• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
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    • 专利摘要:

    公开号:FR3017689A1
    申请号:FR1451250
    申请日:2014-02-17
    公开日:2015-08-21
    发明作者:Alain-Christophe Tiberghien；Christophe Durieux；Igor Bahno
    申请人:Staeubli Faverges SCA；
    IPC主号:
    专利说明:

    [0001] The present invention relates to a bayonet fitting adapted for the detachable joining of pipes. EP-A-2 141 402 discloses a bayonet connection comprising a female element for receiving a male element in fitting. The female member comprises a body, an inner locking ring mounted around the body and an outer safety ring superimposed on the locking ring. The locking ring has notches provided to receive protruding locking pins disposed on the male member, so as to achieve a bayonet-type attachment. Two seals are located in the fluid stream, at the respective valves of the male and female elements, which makes them difficult to access. A third seal is inaccessible because it is disposed in an internal groove of the body of the female member, and covered by the female valve when the connector is in a disengaged configuration. This connection is not suitable for high temperature fluids and / or chemically active because the joints are then deteriorated gradually by the fluid and need to be replaced frequently.
    [0002] In addition, the safety ring has a complex geometry and it is preferably made from a synthetic material to obtain elastic locking claws, which is contraindicated for a thermoregulation application because the high temperatures of the fluid affect the mechanical characteristics of the claws.
    [0003] The safety ring is mounted by the rear of the body of the female element, over the locking ring. In addition, the locking ring is itself mounted around the body of the female element by the rear, which further limits the outer diameter of the rear end of the body and imposes, for applications in which the female element must be connected to pipes of greater diameter, the addition of an intermediate part, and thus also the addition of additional sealing elements. The object of the present invention is to provide a bayonet fitting adapted to high temperature fluids, especially temperatures above 200 ° C, having a simplified maintenance and including a simplified geometry locking ring suitable in particular for a thermoregulation application injection molding molds. Another object of the invention is to provide a coupling element whose body is adapted to cooperate directly with a fluid pipe of relatively large diameter. For this purpose, the subject of the invention is a fitting adapted for the detachable joining of pipes, comprising a coupling element and a complementary coupling element capable of being engaged one inside the other along a longitudinal axis, the connecting element comprises: - a first body, - a locking ring mounted around the first body, - means for securing in translation the first body with the locking ring. The locking ring comprises: - a groove adapted to receive a radially projecting portion of a second body of the complementary element, - a locking notch in which the projecting portion is adapted to be axially locked along the longitudinal axis compared to the first body. The coupling element comprises a lever movable in rotation radially in the groove between a locking position in which the lever blocks the projecting portion in the notch and a release position in which the lever allows the protruding portion to pass therethrough between the notch and the groove, in that elastic means are able to return the lever to the locking position. The coupling element comprises a seal mounted in a housing formed on an outer surface of the first body and the seal is adapted to cooperate radially with the second body in coupled configuration.
    [0004] Thanks to the connection according to the invention, a single seal placed at the outer surface of the body is biased to the coupling and uncoupling, which facilitates the coupling maneuvers and maintenance because it suffices to replace the only seal, which is accessible in uncoupled configuration. In addition, the locking ring has a simplified geometry because it does not include elastically deformable parts. Thanks to the elastic means of return of the lever on the locking ring, it is not necessary to make the locking ring in a flexible material, which allows to use a material that is resistant to high temperatures, such as steel . According to other advantageous features of the coupling according to the invention, taken in any technically permissible combination: - The coupling element and / or the complementary coupling element comprise a valve loaded elastically in the direction of a seat formed in the body of the coupling element receiving this valve. In uncoupled configuration, each valve is in direct sealed contact with the seat. - The seal is disposed in an annular space delimited radially between the first body and the locking ring, and the minimum radial thickness of the annular space in front of the seal is greater than the maximum radial dimension of the radial section of the seal . - The securing means comprise at least one axial abutment and a securing element, such as a ball, cooperating with a rear portion of the locking ring. Along the length of a front portion of the coupling member, delimited by the rear portion of the locking ring and taken along the longitudinal axis, the maximum outer radial dimension of the first body is less than the internal radial dimension minimum of the rear part of the locking ring. - A rear surface of the first body cooperating with the rear portion of the locking ring has a diameter smaller than the minimum internal radial dimension of the rear portion of the locking ring. A first distance, measured parallel to the longitudinal axis between the securing element and the bottom wall of the groove, is less than a second distance, measured parallel to the longitudinal axis between the rear portion of the locking ring and the rear end of the rear surface. - The securing means comprise a ring of balls disposed in an outer groove of the first body and radially covered by the locking ring. - The outer surface of the first body comprises two outer stages whose diameters increase along the longitudinal axis, in a direction from the front end to the rear end of the first body, the inner surface of the second body comprises two floors respectively complementary internal two external stages and the two external stages cooperate with the two internal stages in the coupled configuration of the connection. - During coupling of the coupling, the two outer stages cooperate with the two inner stages before the seal cooperates radially in a sealed manner with the second body. - The connector comprises indexing means for positioning the locking ring and the second body relative to one another about the longitudinal axis in an indexed configuration which occurs during coupling of the coupling, before the contact between the protruding part and the lever. - When the protruding portion is locked in the notch, a side surface of the projecting portion is adapted to come into surface contact with a bottom wall of the notch. - When the protruding portion is locked in the notch, a side surface of the projecting portion is adapted to come into surface contact with the lever, the normal surface contact between the lateral surface of the projecting portion and the lever is oriented in a direction parallel to the axis of rotation of the lever. - When the protruding portion is locked in the notch, a rear end of the projecting portion is adapted to come into surface contact with a leading edge of the notch. - The notch extends in a circumferential direction relative to the longitudinal axis. - Each groove is oriented along the longitudinal axis, and for each groove, the locking notch comprises a first portion and a second portion extending on either side of the groove, the projecting element can be received in the first or second part of the notch. - The outer surface of the locking ring is provided with a tool recess, including hexagon, formed around the longitudinal axis. The invention will be better understood on reading the following description, given solely by way of non-limiting example and with reference to the appended drawings, in which: FIG. 1 is a perspective view of an element of connection and a complementary connecting element forming part of a bayonet connection according to the present invention, in uncoupled configuration; FIG. 2 is a longitudinal section of the elements of the coupling of FIG. 1, in uncoupled configuration; FIG. 3 is an exploded perspective view of the coupling element; - Figure 4 is a top view of the connecting element during assembly; - Figure 5 is a longitudinal section of the connector in an indexed configuration of the coupling element with the complementary coupling element; - Figure 6 is a section of the coupling being mated - Figure 7 is a longitudinal section of the connection in locked configuration, the complementary coupling member being screwed onto a support; - Figure 8 is a cross section on a larger scale along line VIII-VIII in Figure 7, the support is not shown; - Figure 9 is a perspective view and on a larger scale seen in the direction of the arrow F9 in Figure 8; - Figure 10 is a section similar to Figure 8 of the coupling configuration coupled; - Figure 11 is a section similar to Figure 8 showing the unscrewing of the complementary element of its support; FIG. 12 is a view on a larger scale of the connecting element of FIG. 1; 13 is a perspective view of a connecting element according to a variant of the invention, FIG. 14 is a section similar to FIG. 8 of the connecting element of FIG. at 12 represent a bayonet connection 1, comprising a connecting element 4 shaped as a female element, and a complementary coupling element 2 shaped as a male element. Each element 2 and 4 is adapted for the removable connection of two pipes and comprises a rear portion respectively fluidly connected to a pipe C1 or C2, shown in phantom only in Figure 2. The two elements 2 and 4 are generally tubular and complementary from each other, so that they are able to move along a longitudinal axis XX common to these two elements. The term "front" designates the parts of the elements 2 and 4 which are situated, along the longitudinal axis XX, towards the other element 2 or 4 when the elements 2 and 4 are disjoint and the coupling 1 is on the to be connected, in opposition to the parts of the elements described as "rear" which are located, along the longitudinal axis XX, on the side of the pipe C1 or C2 connected to this element 2 or 4. The terms "Inner" or "internal" and "external" or "external" refer to a channel C for the passage of fluid in the coupling 1 coupled. The "inner" or "inner" elements are turned towards the C channel and the "outer" or "outer" elements are turned away from the C channel.
    [0005] The term "radial" or "radially" refers to a direction perpendicular and secant to the longitudinal axis X-X. The complementary coupling element 2 comprises a body 6, said second body, generally tubular and circular section which delimits the channel C. The body 6 comprises two locking pins 8, each projecting radially outward relative to the 6. The pins 8 extend on either side of two diametrically opposed planes of symmetry D8 diametrically opposed forming between them an angle of 180 ° in the representation of Figure 8. Each pin 8 is generally in the form of a ring portion centered on the axis XX and delimited laterally, on each side, by first and second surfaces S81A and S81B not parallel to each other. The first surface S81A is a convex surface shaped cylinder portion whose generator is oriented generally parallel to the plane D8, preferably to plus or minus 15 ° at most with respect to a perfectly radial direction. The second surface S81 B is flat and forms an obtuse angle [3 with a generatrix of the surface S81A, the angle [3 being situated on the side of the median zone of the pin 8 in the representation of FIG. 8. maximum of each pin 8, measured between the first lateral surfaces S81A in a circumferential direction, that is to say a direction orthoradiale with respect to the longitudinal axis XX. The front and rear ends of each pin 8 are each delimited by a flat surface S82 generally shaped ring portion, which is perpendicular to the longitudinal axis X-X. The outer surface of the body 12 is able to cooperate radially with the body 6 in coupled configuration of the connector 1. A valve 7 is mounted in the body 6 and is resiliently loaded by a spring 9 towards a seat 61 formed by the body 6. The rear end of the spring 9 is in abutment against a ring 10 mounted inside the body 6 and axially retained by a first metal elastic ring 11 housed in a groove formed inside the body 6. When the valve 7 is supported on the seat 61, the seal between the valve 7 and the body 6 is ensured only by the direct sealing contact between the metal materials that make up the valve 7 and the body 6. In other words, in position sealing, the entire area of contact between the body 6 and the valve 7 is formed by the metal surfaces of the body 6 and the valve 7. Thus, no reported seal is necessary to ensure the tanchéité between the valve 7 and the body 6. The contact zone is formed by a frustoconical seat surface 61 and a convex curved surface of the valve 7 of complementary shape. The connecting element 4 comprises a body 12, said first body, generally tubular and circular section which defines the channel C. A locking ring 14 of generally circular section, coaxial with the body 12 and centered on the longitudinal axis XX , is mounted around the body 12.
    [0006] A second external metal elastic ring 17 is mounted in a groove 124 formed in an outer surface of the body 12 and forms an axial stop for the ring 14. A ring of several balls 18 is disposed around the longitudinal axis XX in an external groove 122 of the body 12, visible in Figure 3 and located on the side of a front end 12A of the body 12 relative to the groove 124. The balls 18 and the second elastic ring 17 form means for securing in translation of the ring of locking 14 with the body 12. The rear end 12B of the body 12 has an internal thread 127 provided to cooperate with an external thread of the pipe C2.
    [0007] The locking ring 14 is axially integral with the body 12. A rear portion 14B of the locking ring 14 is retained axially on the body 12 between the second elastic ring 17 and the balls 18. Along the longitudinal axis XX and in a first direction from a rear end 12B of the body 12 and towards its front end 12A, the rear portion 14B of the locking ring 14 is retained by the balls 18. Along the longitudinal axis XX and in an opposite direction from the front end 12A of the body 12 towards its rear end 12B, the rear portion 14B of the locking ring 14 is retained by the second elastic ring 17. The body 12 is equipped with an outer seal 19, that is, mounted on the outside of the body 12, preferably an elastomer, which is housed in an outer peripheral groove 126 of the body 12 near its front end 12A. The seal 19 is the only sealing element attached to the connection 1. The connecting element 4 thus comprises a single attached seal, namely the seal 19, and the complementary coupling element 2 has no element reported sealing. The body 12 of the connecting element 4 has an internal groove 128 which receives a third metal elastic ring 20 housed inside the body 12, against which an internal ring 21 acts as a stop for a spring 22 which exerts an elastic force on a valve 13 so as to press against a seat 120 formed in the body 12. A4 is a front portion of the connecting element 4, extending along the axis XX between the end before 12A of the body 12 and the rear portion 14B of the locking ring 14 secured axially on the body 12. The front portion A4 delimits a front portion of the body 12. Over the entire length of the front portion A4, along the longitudinal axis XX, the maximum external radial dimension of the body 12 is smaller than the minimum radial internal dimension of the locking ring 14. In particular, this maximum external radial dimension of the body 12 is smaller than the internal diameter D14 of the party e back 14B. Thus, over the entire length of the front portion A4 of the connecting element 4, taken along the longitudinal axis XX, the maximum external radial dimension of the body 12 is smaller than the minimum internal radial dimension of the rear portion 14B of the locking ring 14. At the front portion A4, the outer surface of the body 12 of the connecting member 4 comprises a front stage 121 and an intermediate stage 123 forming external stages. The stages 121 and 123 are circular cylindrical outer surfaces, connected to one another by a frustoconical surface S12. The diameter D121 of the front stage 121 is slightly smaller than the diameter D123 of the intermediate stage 123. The diameter of the stages 121 and 123 increases along the longitudinal axis XX and in a direction from the front end 12A of the body 12 towards its rear end 12B. The inner radial surface of the body 6 of the complementary coupling element 2 comprises a front stage 62 and a rear stage 63 which are two circular cylindrical inner surfaces whose respective internal diameters D62 and D63 increase while approaching axially the front end 6A of the body 6. The rear stage 63 has a larger diameter D63 than the front stage D62 and is axially closer to the front end 6A. The portions 62 and 63 are connected to each other by a frustoconical surface 65. The internal diameter D62 of the front portion 62 is substantially equal to the diameter D123 of the rear portion 123. The internal diameter D63 of the rear portion 63 is substantially equal to the diameter D121 of the front portion 121. Thus, the stages 62 and 123 on the one hand, and the stages 63 and 121 on the other hand, are complementary. The stage 123 of the body 12 is extended towards the rear end 12B by a rear surface 129 whose diameter D129 is constant and strictly greater than the diameter D123 of the stage 123. The outer rear surface 129 houses the balls 18 and the elastic ring 17. The diameter D129 is strictly smaller than the internal diameter of the rear portion 14B to allow the rear portion 14B of the ring 14 to be placed around the rear surface 129. In a variant, the diameter D129 is variable along the longitudinal axis XX while remaining smaller than the inner diameter of the rear portion 14B.
    [0008] The rear surface 129 is limited towards the rear end 12B of the body 12 by a rear end 129B from which the body 12 has a radial dimension greater than the internal diameter of the rear portion 14B. The seal between the body 12 and the valve 13 is made similarly to the seal between the body 6 and the valve 7. When the valve 13 bears on the seat 120, the seal between the valve 13 and the body 12 is provided solely by the direct sealing contact between the metallic materials that make up the valve 13 and the body 12. In other words, in sealing position, the entire contact area between the body 12 and the valve 13 is formed by the metal surfaces of the body 12 and the valve 13. Thus, no added seal is necessary to seal between the valve 13 and the body 12. The contact area is formed by a frustoconical surface of the seat 120 and a convex curved surface of the valve 13, of complementary shape. The locking ring 14 of the connecting element 4 is rotatable relative to the body 12 about the longitudinal axis X-X. The locking ring 14 is provided with two longitudinal grooves 141, regularly distributed around the longitudinal axis XX so as to simultaneously receive the two locking pins 8 of the complementary coupling element 2. Each groove 141 is open on the front of the locking ring 14, that is to say at its front face 14A. Each groove 141 extends over the entire radial thickness of the locking ring 14, from a mouth 143 formed in the front face 14A. Each groove 141 ends, opposite the mouth 143, by a bottom wall 144 located on the side of the rear portion 14B of the locking ring 14 relative to the mouth 143. The grooves 141 are of shape rectilinear and extend parallel to the longitudinal axis XX.
    [0009] Each groove 141 extends on either side of a median plane P141 passing through the axis X-X and extending in a radial direction. The plane P141 is a plane of symmetry for the groove 141. Between the mouth 143 and the bottom wall 144, each groove 141 is extended in a circumferentially oriented direction, that is to say a direction orthoradial with respect to the groove 141. XX longitudinal axis, by a locking notch 145 which comprises a first portion 145A extending from a first side of the groove 141, and a second portion 145B extending from the other side of the groove 141. Parts 145A and 145B extend at the same level along the axis XX and are located on either side of the plane P141.
    [0010] Each portion 145A and 145B respectively has a mouth 146A or 146B which opens into the groove 141, and a bottom wall 147A or 147B opposite the corresponding mouth 146A or 146B. Two levers 15 are hingedly mounted on the locking ring 14. Each lever 15 is designed to be partially received in one of the grooves 141 of the locking ring 14, in a coupled and uncoupled configuration of the coupling 1.
    [0011] Each lever 15 has the overall shape of a torus portion centered on the axis X-X, delimited by two longitudinal edges parallel to each other. The longitudinal edges are parallel to a radial plane of symmetry of the lever 15 passing through the axis X-X. The width L15 of each lever, measured in a circumferential direction with respect to the longitudinal axis XX, is substantially equal, with the functional clearances, to the width L141 of the groove 141 receiving this lever 15. Each lever 15 is rotatably mounted on the locking ring 14, by means of a shaft 161 aligned on an axis X 15 orthoradial with respect to the longitudinal axis XX, perpendicular to the plane of symmetry of the groove 141 and the lever 15. The shaft 161 extends on the along the axis XX, between the rear portion 14B of the locking ring 14 and the notch 145. The levers 15 are movable radially in the grooves 141. The ends of the shafts 161 are housed in openings in the ring locking 14. Thus, the levers 15 are rotatable relative to the ring 14, about orthoradial X15 axes with respect to the longitudinal axis XX. In a first direction of rotation tending to radially move the front ends 15A of the levers 15 of the locking ring 14, the rotational movement of the levers 15 is limited by the support of the rear end 15B of the levers 15 against the ring of locking 14. In the other direction, the rotation of the levers 15 is limited by shafts 162 serving as a stop lever 15. The shafts 162 are parallel to the shafts 161 and their ends are housed in holes in the locking ring 14 An elastic return means 23, such as a compression spring, is interposed radially between the locking ring 14 and the rear end of each lever 15, and exerts an elastic force which pushes the lever 15 against the deflector by default. shaft 162, in a locking position in which the lever 15 is housed inside the grooves 141.
    [0012] The outer peripheral groove 126 of the seal 19 is disposed at the level of the front stage 121, near the front end 15A of the levers 15, more particularly along the axis XX between the notches 145 and the front end 15A levers 15. During the manufacture of the element 4, the assembly of the element 4 is made by first mounting a single lever 15 on the locking ring 14, by means of a first shaft 161. A spring 23 is arranged radially between the rear end 15B of the lever 15 and the rear portion 14B of the locking ring 14. The second shaft 162 is placed in the openings of the locking ring 14 provided for this purpose. Then, the locking ring 14 is mounted around the body 12, more precisely around the rear surface 129, by the front end 12A of the body 12, to a retracted position in which, on the one hand, the end rear end 14B is axially aligned with the rear end 129B of the rear surface 129 and, secondly, the rear portion of the groove 141 without lever 15 is aligned axially along the longitudinal axis XX with the groove 122 intended to receive the balls 18. This retracted position makes it possible to introduce the balls 18 into the groove 122. In the secured configuration of the locking ring 14 on the body 12, a distance d1, measured parallel to the axis longitudinal XX between the balls 18, at the rear end of the groove 122, and the bottom wall 144 of the groove 141, is less than a distance d2, measured parallel to the longitudinal axis XX between the end rear end of the rear portion 14B and the rear end 129B of the rear surface 129, which makes it possible to introduce the balls 18 into the groove 122 by the groove 141 with the locking ring 14 in the retracted position for assembly of the element 4. Then, the balls 18 are introduced one by one in the groove 122 by the groove 141 without lever 15. The grooves 141 pass through the entire thickness of the locking ring 14, as shown in FIG. The distance d2 forms a clearance of the locking ring 14 towards the rear end 12B of the body 12, at the rear surface 129, allowing the balls 18 to be introduced into the groove 141 with the locking ring 14 in position. steephead Valley. Indeed, the rear surface 129 is limited to the rear end 12B of the body 12 by a portion 130 of diameter greater than the diameter D129. To allow the introduction of the balls 18, the diameter of the balls 18 is less than or equal to the width L141 of the grooves 141, measured in a direction orthoradial to the longitudinal axis X-X. The diameter of the balls 18 corresponds to the maximum dimension of the balls 18. Then, once the ring of balls 18 is put in place in the groove 122, the locking ring 14 is advanced until the rear portion 14B of the ring 14 comes into contact with the balls 18, which are then all covered radially by the ring 14. The rear portion 14B of the locking ring 14 then cooperates with the rear surface 129 of the body 12. Then, the elastic ring 17 is placed in the groove 124 to axially immobilize the ring 14. Finally, the second lever 15 is mounted on the locking ring 14, by means of the second shaft 161. In uncoupled configuration, the elements 2 and 4 are disjointed , as shown in Figures 1 and 2. To connect, the user brings the two elements 2 and 4 according to the arrows F1, whose orientation is parallel to the longitudinal axis XX. The coupling 1 is then brought into an indexed configuration, represented in FIG. 5, in which the front end 6A of the body 6 of the complementary coupling element 2 is introduced into the coupling element 4, in an annular space E delimited radially between the body 12 and the locking ring 14.
    [0013] At the front portion A4 of the connecting element 4, the maximum external dimension D12 of the body 12 is strictly smaller than the minimum internal dimension D14 of the locking ring 14, so as to provide the annular space E. note D1 a minimum thickness of the annular space E, measured radially forward of the seal 19, that is to say along the longitudinal axis XX between the rear end of the groove 126 and the front end 12A of the body 12. Along the longitudinal axis XX, the seal 19 is set back inside the annular space E with respect to the front end 12A of the body 12 of the element 4. Each peg of 8 engages in one of the grooves 141 of the locking ring 14, so as to perform an angular indexing, around the longitudinal axis XX, of the complementary coupling element 2 relative to the element of 4. The locking pins 8 and the grooves 141 therefore form the means s of indexing around the longitudinal axis XX of the body 6 with respect to the locking ring 14. The width L141 of the grooves 141 is substantially equal to the width L8 of the locking pins 8, so as to carry out translational guidance of the complementary coupling element 2 with respect to the locking ring 14. During the progression of the complementary element 2 in the element 4, this angular indexing occurs before the contact between the rear stage 63 of the body 6 of the complementary coupling element 2 and the seal 19 and before the contact of the pins 8 with the levers 15, as can be seen in FIG. 5. During the coupling, the front stage 62 of the complementary element 2 cooperates with the front stage 121 of the element 4, with a significant radial clearance between the surfaces of these two stages. This radial clearance results from the difference of diameters D62 and D121. Then, the front stage 62 engages around the rear stage 123 with a reduced radial clearance and the rear stage 63 engages around the front stage 121 with a reduced radial clearance, so as to achieve a double translational guiding of the complementary coupling element 2 in the connecting element 4. The double guiding starts before the pegs 8 come into contact with the levers 15. FIG. 6 represents a configuration being mated, posterior to the indexed configuration , in which the body 6 of the complementary element 2 has continued to progress in the element 4, so that the pins 8 have advanced towards the bottom wall 144 of the grooves 141. The levers 15 are lifted by the pins 8, thanks to a sliding contact between the pins 8 and the parts of the levers 15 previously engaged in the grooves 141. The levers 15 are raised against the elastic forces exerted by the springs 23 in a release position, in which e the levers 15 allow the passage of the pins 8 between the parts 145A and 145B of the notch 145 and the groove 141.
    [0014] The front end 6A of the body 6 of the complementary element 2 comes into abutment against an external shoulder 125 formed in the body 12 of the connecting element 4. A flat front face 72 of the valve 7 of the connecting element 2 complements contact with a flat front face 132 of the valve 13 of the connecting element 4. The valves 7 and 13 are pushed out of their seat 61 or 120, against the return forces of the springs 9 and 22. The circulation of the fluid in the channel C between the elements 2 and 4 is then allowed. In order to lock the connection 1, it is necessary to rotate the locking ring 14 relative to the body 6 of the complementary coupling element 2, in order to bring the pins 8 into one of the parts 145A or 145B of the locking notches 145. When the complementary element 2 is previously connected to the pipe C1, the pins 8 can be brought indifferently into the portion 145A or 145B of the notches 145. The pins 8 are all brought into the part 145A notches 145, or alternatively all brought into the 145B portion of the notches 145, depending on the direction of the rotational movement. The pins 8 are then angularly offset relative to the levers 15, which are elastically biased into the locking position by the springs 23. In the locking position, the levers 15 block the pins 8 in the notches 145 and prevent the release of the pins 8 outside the notches 145 to the grooves 141, thanks to the surface support of the second lateral surfaces S81 B of the pins 8 against a longitudinal edge of the levers 15. The connection 1 is then in a locked configuration, in which the pins 8 are locked axially relative to the body 12 in the notches 145. In other words, the locking ring 14 blocks the withdrawal of the complementary element 2 from the element 4.
    [0015] Figure 7 shows the connection 1 and a support 100 of the pipe C1. In Figure 7 the channel Cl is not shown for the sake of clarity. The coupling 1 is in a coupled and locked configuration, in which the fluid can pass through the channel C between the elements 2 and 4. The rear end 6B of the body 6 of the complementary element 2 is provided with an internal thread 64 which cooperates sealingly with an external thread of the pipe C1. In the configuration of FIG. 7, the element 2 is screwed in a sealed manner on the pipe C1 before coupling of the elements 2 and 4. During locking, the operator rotates the locking ring 14 with respect to the complementary element 2 to place the pins 8 in one of the two parts 145A or 145B of the notches 145, indifferently.
    [0016] In the case where the complementary coupling element 2 is not screwed to the support 100 prior to the coupling of the elements 2 and 4, the connecting element 4 is used to screw the complementary element 2 on the support 100. For this purpose, when the front end 6A of the body 6 of the element 2 is in abutment against the shoulder 125 of the body 12 of the element 4, the locking pins 8 are engaged in the notch 145 by performing a rotational movement of the body 6 of the element 2 in the direction corresponding to the screwing direction of the element 2 on the support 100. For example, in the example of FIG. 8, the thread is on the right and the pins 8 are brought into the parts 145A of the notches 145. To screw the element 2 on the support 100, the outer surface of the locking ring 14 is provided with a tool recess 148, for example with external hexagon , intended to cooperate with a complementary tool such as a key, allowing transme the tightening torque to the locking ring 14 and thereby rotate the body 6 through the contact between the first surfaces S81A of the pins 8 and the bottom wall 147A of the notches 145A. This contact is a surface contact to ensure a satisfactory transmission of the screwing torque, which can be high.
    [0017] The tool allows the element 2 to be screwed onto the pipe Cl in the case where the support 100 forms a well 102 which surrounds the coupling 1 and makes the complementary element 2 inaccessible by hand. The tool recess 148 protrudes axially from the well 102 when the complementary element 2 is completely screwed with the pipe C1. In other words, the tool recess 148 is disposed axially at least partially at the rear of the outer shoulder 125, which makes it possible to reduce the radial dimensions of the well 102. When the complementary element 2 is completely screwed onto the pipe C1, it is then possible to feed the pipe Cl or C2 to circulate a fluid in the channel C between the coupling element 4 and the complementary coupling element 2. When the coupling is in the coupled configuration, the forces repulsion of the elements 2 and 4 generated by the springs 22 and 9 are transmitted from the element 2 to the element 4 by the rear plane surfaces S82 of the pins 8, which are in contact in the longitudinal direction with the front edges 145.1 of the Notches 145. This surface contact has an extended area, which ensures good transmission of the spacing forces of the bodies 12 and 6. In addition, the levers 15 do not support these repulsion efforts, which is favorable for the mechanical strength of the fitting 1. In locked configuration of the connector 1, the levers 15 oppose the unlocking of the pins 8 out of the notches 145, for example in case of vibrations. The levers 15 extend over the entire depth of the notches 145, which makes it possible to obtain an extended surface contact between the second surfaces S81 B of the pins 8 and the longitudinal edges of the levers 15, and secures the locking of the connector 1. The normal to this surface contact is oriented in an orthoradial direction parallel to the axis X15. As a variant, the normal forms an angle inclined at most by plus or minus 15 ° with respect to this orthoradial direction. Thus, the forces of the pins 8 received in the notches 145A or 145B against the levers 15 in the locked position do not cause the levers 15 to be lifted towards their position of release of the pins 8.
    [0018] The outer radial surfaces of the stages 121 and 123 of the body 12 are complementary to the internal radial surfaces of the stages 62 and 63 of the internal surface of the body 6. In the completely fitted configuration of the elements 2 and 4, the stage 121 of smaller diameter of the element 4 is fitted at the level of the smaller diameter stage 63 of the complementary element 2, and the stage 121 covers the stage 63 over a covering length L121 / 63. Likewise, in this configuration, the larger diameter stage 123 of the element 4 is fitted at the level of the smaller diameter stage 62 of the complementary element 2, and the stage 123 covers the stage 62 over a lap length L123 / 62. When coupling elements 2 and 4, double guiding begins before there is a frank contact between the body 6, at the rear stage 63, and the entire periphery of the seal 19, that is, that is to say before the seal 19 cooperates radially in a sealed manner with the body 6. The jamming of the body 12 in the body 6 is avoided and the guide of the element 12 in the body 6 is favored. To unlock the connection 1, it is necessary that an operator simultaneously maneuver each lever 15 by pressing on its rear end 15B against the return forces of the springs 23. The front ends 15A of the levers 15 are radially disengaged out of the grooves 141 at the axial level of the notches 145, and reach their release position, wherein the levers 15 do not block the pins 8 in the notches 145. The pins 8 can then out of the notches 145 when an operator performs a rotational movement of the body 6 of the complementary element 2 with respect to the locking ring 14. When each pin 8 leaves its notch 145, the repulsion forces generated by the valves 7 and 13, which are elastically loaded by the springs 9 and 22, cause the pins 8 towards the mouth 143 of the grooves 141, which has the effect of separating the elements 2 and 4 and bring the fitting 1 in disactivated configuration uplée. In order to unscrew the complementary element 2 of its pipe C1, when the coupling 1 is in coupled configuration and the pins 8 are locked in the notches 145, the operator previously closes the fluid supply to interrupt the flow of fluid in the channel C, between the channels C1 and C2.
    [0019] An operator makes a tool cooperate with the impression 148 of the locking ring 14, and causes the ring 14 to rotate in the direction corresponding to the unscrewing of the complementary element 2 with the support 100. The surface contacts between the pins 8 and the levers 15 transmit this torque to the body 6 of the complementary element 2, which has the effect of unscrewing the element 2 of the pipe C1. When the unscrewing torque is high, especially for connections 1 having a large diameter channel C, the unscrewing force applied to the levers 15 tends to damage the levers 15. Also, it is preferable, before unscrewing the complementary element 2, uncoupling the coupling 1 and re-coupling it by engaging the pins 8 in the 145B part of the notches 145 opposite that used for the screwing of the complementary element 2 on the support 100, in order to drive in rotation the body 6 of the complementary element 2 via the surface contact between the pins 8 and the bottom 1478 of the portion 1458 of the notches 145, as shown in Figure 9. The locking of the elements 2 and 4 is performed by the bayonet system and the levers 15, which can be visually controlled from the outside, which is advantageous. In addition, during the locking, when the levers 15 are returned to the locking position at the end of the locking phase, the impact between the levers 15 and the shafts 162 produces a sound allowing the operator to ensure the locking correct fitting 1.
    [0020] The connector 1 comprises a single attached seal 19, which is disposed on the outer surface of the body 12 of the element 4, outside the channel C of the fluid circulation. The seal 19 is disposed in the annular space E, which is accessible in uncoupled configuration without disassembling the locking ring 14 or the levers 15, which facilitates maintenance while protecting the seal 19 by the locking ring 14 in uncoupled configuration In particular, the seal 19 is formed by a torus of radial section, that is to say in a plane of radial direction section passing through the longitudinal axis XX, circular and the outer diameter D19 of the radial section of the seal 19, corresponding to the maximum radial dimension of the radial section of the seal 19, is smaller than the minimum radial dimension D1 of the portion of the annular space E in front of the seal 19, that is to say defined axially by the housing 126 and the front face 14A of the ring 14. This provides sufficient space for the assembly and disassembly of the seal 19 to or from the housing 126. The seal 19 can be easily replaced by e Before each coupling, it is possible to use a conventional low-cost seal. For example, in the case of a high temperature fluid, the gasket 19 is not necessarily designed to withstand high temperatures, which is less expensive.
    [0021] The seal 19 provides a radial seal between the bodies 6 and 12, that is to say that the seal 19 cooperates radially sealingly with the body 6 in coupled configuration, which ensures tightness even in case of vibration. The locking ring 14 can be mounted by the front of the body 12 of the element 4. Thus, unlike the connection according to EP-A-2 141 402, the choice of the diameter of the rear end 12B of the body 12, connected to the pipe C2, is independent of the minimum internal diameter of the locking ring 14. It is therefore not necessary to provide an intermediate ring in the case of applications where the pipe C2 has a large diameter, which allows s also free from the presence of additional sealing elements. This limits the risk of leaks for high temperature applications. The balls 18 are mounted by the groove 141 so that no other arrangement is necessary on the locking ring 14. The mounting of the locking ring 14 around the body 12 is made simply by the balls 18 and the second metal elastic ring 17. The disassembly of the locking ring 14, according to the reverse procedure to that described for its mounting, is also simple, non-destructive and does not require disassembly of the pipe C2 of the element 4, this which makes it possible to regularly clean the external surface of the body 12 and in particular the housing 126 of the gasket 19. The double guiding of the bodies 6 and 12 of the elements 2 and 4 makes it possible to limit the mechanical stresses of the gasket 19 in the event of vibrations. In particular, during the coupling, the double cooperation of the stages 62 and 63 with the stages 121 and 123 begins before the contact of the front end 6A of the body 6 of the complementary element 2 with the seal 19. This limits the mechanical forces entered by the seal 19, which increases the life of the seal 19 and improve the seal.
    [0022] The angular indexing of the elements 2 and 4 is effective before the contact of the pins 8 with the levers 15, which facilitates coupling blindly, for example when the entire length of the complementary element 2 is embedded in its support 100. As a variant, the indexing may be carried out prior to the engagement of the pins 8 in the grooves 141, by the cooperation of elements of the body 6 other than the pins 8 with the body 12.
    [0023] To allow the screwing and unscrewing of the complementary element 2 with its support 100, when the complementary element 2 is locked in the element 4, the locking ring 14 can be operated, instead of using a specific tooling maneuvering the complementary element 2. This reduces the axial size of the complementary element 2, which must not necessarily exceed the well formed by the support 100.
    [0024] The rotation guide of the locking ring 14 is formed by the balls 18, which provide good guiding accuracy. During rotation of the ring 14 for locking or unlocking, screwing or unscrewing, the pipe C2 is not stressed in torsion.
    [0025] The double guiding of the bodies 6 and 12 of the elements 2 and 4 in the locked position of the coupling 1 ensures precise rotation of the body 6 of the complementary element 2, which makes it possible to screw or unscrew the complementary element 2 without jamming and without damage to the seal 19. The structure of the connector 1, with two grooves 141 and two diametrically opposed pins 8, optimizes the geometry of the surfaces in contact during screwing and unscrewing operations. Alternatively, the pins 8 may be distributed around the X-X axis with an angle α different from 180 °. In addition, the pieces 8 can be of different widths. The grooves 141 are then also different widths L141 to adapt to the width L8 of each pin 8. These variants allow keying, advantageous not to confuse the circuits if several type 1 connectors are used nearby. The non-parallel portions S81A and S81B of the lateral surfaces S81 of the pins 8 make it possible to optimize the contacts according to whether the pins 8 abut at the bottom of the notch 147A, 147B or against the lever 15. The surfaces S81A and S81B are provided on each surface S81 side to optimize the contacts as the pins 8 are placed in one of the 145A or 145B parts of the notches 145. In the coupled configuration, the axial surface contacts between the rear surfaces S82 of the pins 8 and the notches 145, as well as the surface contacts between the first surfaces S81A of the pins 8 and the bottom walls 147 and the surface contacts between the second surfaces S81B of the pins 8 and the levers 15, have an extended area. Thus, the bayonet lock is very robust, especially when the connector 1 is subjected to vibrations. The flat face 132 of the valve 13 is flush in the longitudinal direction with the front face of the front end 12A of the body 12 in uncoupled configuration of the connector 1, to limit the risk of pollution. Figures 13 and 14 show a coupling element 4000 according to a variant of the invention, wherein the notches 145 each comprise a single portion 145A extending from one side of the groove 141 corresponding. In this case, the locking of the ring 14 is possible due to a rotation of the ring 14 only in one direction, corresponding to the direction of entry of the pins 8 into the notches 145A.
    [0026] In another variant of the invention, not shown, the balls 18 are replaced by other securing elements such as rollers or by simple obstacles such as pins mounted in housings distributed around the axis X-X. In the latter case, the locking ring 14 may not be rotatable relative to the body 12. In the embodiments shown in the figures, the rotation of the locking ring 14 relative to the body 12 allows, during the locking and unlocking, do not bias the C2 pipe when the latter is connected to the element 4 before locking or unlocking.
    [0027] When the locking ring 14 is not movable around the body 12, the levers 15 can be mounted articulated in rotation on the body 12 in the groove 141. In another variant of the invention, the orientation of the notches 145 is oblique with respect to the longitudinal axis XX and comprises both an axial component and a circumferential component. When the axial component is directed forward in the direction of progression of the pins 8 in the notches 145, the axial size of the connector 1 is increased and an overtravel of the complementary element 2 in the element 4 is necessary for the 'coupling. When the axial component is directed towards the rear, the locking forces received by the levers 15 are accentuated. The threads 64 and 127 for connecting the bodies 6 and 12 of the elements 2 and 4 to the pipes C1 and C2 are internal but alternatively they may be external. The pins 8 may be replaced by parts of different geometry projecting radially from the body 6 of the complementary element 2. In another variant not shown, only the element 4 or the complementary element 2 is equipped with a valve 13 or 17.
    [0028] In the context of the invention, the various variants described can be combined with each other, at least partially. For example, it is conceivable to provide a locking ring 14 having notches 145 which comprise only one portion 145A or 145B, in combination with a notch 145 oriented obliquely.
    权利要求:
    Claims (15)
    [0001]
    CLAIMS1.- Fitting (1) adapted for the detachable connection of pipes (C1, C2), comprising a connecting element (4) and a complementary coupling element (2) capable of fitting into each other according to a longitudinal axis (XX), the connecting element (4) comprising: - a first body (12), - a locking ring (14) mounted around the first body (12), - means for securing in translation of the first body (12) with the locking ring (14), the locking ring (14) comprising: - a groove (141) adapted to receive a projecting portion (8) radial of a second body (6) of the complementary element (2), - a locking notch (145) in which the projecting portion (8) is adapted to be axially locked along the longitudinal axis (XX) relative to the first body (12), characterized in that that the connecting element (4) comprises a lever (15) movable in rotation radially in the groove (141) between a blast position cage in which the lever (15) blocks the protruding portion (8) in the notch (145) and a release position in which the lever (15) allows the projecting portion (8) to pass between the notch (145) and the groove (141), in that resilient means (23) are adapted to bias the lever (15) towards the locking position, in that the connecting element (4) comprises a seal of sealing (19) mounted in a housing (126) formed on an outer surface of the first body (12) and in that the seal (19) is adapted to cooperate radially with the second body (6) in coupled configuration.
    [0002]
    2. A coupling (1) according to claim 1, characterized in that the connecting element (4) and / or the complementary coupling element (2) comprises a resiliently loaded valve (7, 13) (9, 22 ) towards a seat (61, 120) formed in the body (6, 12) of the connecting element (2, 4) receiving this valve and in that in uncoupled configuration, each valve (7, 13) ) is in direct sealing contact with the seat (61, 120).
    [0003]
    3.- Fitting (1) according to one of the preceding claims, characterized in that the seal (19) is disposed in an annular space (E) delimited radially between the first body (12) and the locking ring (14). ), and in that the radialimaging thickness (D1) of the annular space (E) in front of the seal (19) is greater than the maximum radial dimension (D19) of the radial section of the seal (19).
    [0004]
    4. Fitting (1) according to one of the preceding claims, characterized in that the securing means comprise at least one axial abutment (17) and a securing element (18), such as a ball, cooperating with a rear portion (14B) of the locking ring (14), and in that along the length of a front portion (A4) of the connecting member (4), delimited by the rear portion (14B) of the ring for locking (14) and taken along the longitudinal axis (XX), the maximum external radial dimension of the first body (12) is smaller than the minimum internal radial dimension of the rear portion (14B) of the locking ring ( 14).
    [0005]
    5. A coupling (1) according to claim 4, characterized in that a rear surface (129) of the first body (12) cooperating with the rear portion (14B) of the locking ring (14) has a diameter (D129 ) less than the minimum internal radial dimension of the rear portion (14B) of the locking ring (14) and that a first distance (d1) measured parallel to the longitudinal axis (XX) between the fastening (18) and the bottom wall (144) of the groove (141) is smaller than a second distance (d2), measured parallel to the longitudinal axis (XX) between the rear portion (14B) of the groove locking (14) and the rear end (129B) of the rear surface (129).
    [0006]
    6. Fitting (1) according to one of claims 4 or 5, characterized in that the securing means comprise a ring of balls (18) disposed in an outer groove (122) of the first body (12) and radially covered by the locking ring (14).
    [0007]
    7. Fitting (1) according to one of the preceding claims, characterized in that the outer surface of the first body (12) comprises two outer stages (121, 123) whose diameters (D121, D123) increase along the l longitudinal axis (XX), in a direction from the front end (12A) to the rear end (12B) of the first body (12), in that the inner surface of the second body (6) comprises two internal stages (62, 63) respectively complementary to the two outer stages (121, 123) and in that the two outer stages (121, 123) cooperate with the two inner stages (62, 63) in the coupled configuration of the coupling (1). 35
    [0008]
    8. Fitting (1) according to claim 7, characterized in that during coupling of the connector (1), the two outer stages (121, 123) cooperate with the two inner stages (62, 63) before the seal (19) cooperates radially sealingly with the second body (6).
    [0009]
    9. A coupling (1) according to one of the preceding claims, characterized in that the connector comprises indexing means (141, 8) for positioning the locking ring (14) and the second body (6) l relative to one another about the longitudinal axis (XX) in an indexed configuration which occurs, during coupling of the coupling (1), before contact between the projecting portion (8) and the lever ( 15).
    [0010]
    10. Fitting (1) according to one of the preceding claims, characterized in that when the projecting portion (8) is locked in the notch (145), a lateral surface (S81A) of the projecting part (8) ) is able to come into surface contact with a bottom wall (147) of the notch (145).
    [0011]
    11. A coupling (1) according to one of the preceding claims, characterized in that, when the projecting portion (8) is locked in the notch (145), a lateral surface (S81B) of the projecting portion ( 8) is able to come into surface contact with the lever (15) and in that the normal in surface contact between the lateral surface (S81 B) of the projecting part (8) and the lever (15) is oriented according to a direction parallel to the axis of rotation (X15) of the lever (15).
    [0012]
    12. Fitting (1) according to one of the preceding claims, characterized in that when the projecting portion (8) is locked in the notch (145), a rear end (S82) of the projecting portion (8) ) is able to come into surface contact with a front edge (145.1) of the notch (145).
    [0013]
    13.- Fitting (1) according to one of the preceding claims, characterized in that the notch (145) extends in a circumferential direction relative to the longitudinal axis (X-X).
    [0014]
    14.- Fitting (1) according to one of the preceding claims, characterized in that each groove (141) is oriented along the longitudinal axis (XX), and in that for each groove, the locking notch (145 ) comprises a first portion (145A) and a second portion (145B) extending on either side of the groove (141), the projecting member (8) being receivable in the first or second portion of the notch (145).
    [0015]
    15.- coupling (1) according to one of the preceding claims, characterized in that the outer surface of the locking ring (14) is provided with a tool recess (148), including hexagon, arranged around the longitudinal axis (XX).
    类似技术:
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    同族专利:
    公开号 | 公开日
    US9863566B2|2018-01-09|
    US20150233509A1|2015-08-20|
    EP2908042A1|2015-08-19|
    CN104847992A|2015-08-19|
    CN104847992B|2019-05-14|
    DK2908042T3|2016-10-10|
    FR3017689B1|2016-03-11|
    PT2908042T|2016-08-19|
    ES2589120T3|2016-11-10|
    EP2908042B1|2016-08-03|
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    法律状态:
    2015-02-19| PLFP| Fee payment|Year of fee payment: 2 |
    2016-02-17| PLFP| Fee payment|Year of fee payment: 3 |
    2017-02-23| PLFP| Fee payment|Year of fee payment: 4 |
    2018-11-30| ST| Notification of lapse|Effective date: 20181031 |
    优先权:
    申请号 | 申请日 | 专利标题
    FR1451250A|FR3017689B1|2014-02-17|2014-02-17|BAIONNETTE CONNECTOR SUITABLE FOR REMOVABLE JUNCTION OF PIPELINES|FR1451250A| FR3017689B1|2014-02-17|2014-02-17|BAIONNETTE CONNECTOR SUITABLE FOR REMOVABLE JUNCTION OF PIPELINES|
    US14/608,933| US9863566B2|2014-02-17|2015-01-29|Bayonet coupling for the disconnectable connection of pipelines|
    PT151551777T| PT2908042T|2014-02-17|2015-02-16|Bayonet-type connector suitable for removable connection of pipes|
    CN201510085093.7A| CN104847992B|2014-02-17|2015-02-16|The bayonet joint device being detachably connected for pipeline|
    EP15155177.7A| EP2908042B1|2014-02-17|2015-02-16|Bayonet-type connector suitable for removable connection of pipes|
    DK15155177.7T| DK2908042T3|2014-02-17|2015-02-16|Bayonet coupling for detachable connection of pipelines|
    ES15155177.7T| ES2589120T3|2014-02-17|2015-02-16|Bayonet closure adapted for removable pipe connection|
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