• 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
  • 优先权
    • 专利摘要:
    Gas cylinder comprising a main body (1) with an annular groove (12) extending along the circular contour of an outer surface (13) of the main body (1), a piston (2) displaceable linearly and longitudinally, a bushing (3) arranged between the piston (2) and the main body (1), a ring (4) arranged between the main body (1) and the bushing (3) for coupling said main body (1) and said bushing (3) with respect to each other, and a safety elevation (30) formed as a vertical extension of the bushing (3) and protruding from an upper surface (14) of the main body (1). The distance (d1) between the ring (4) and a lower surface (15) of the main body (1) is smaller than the distance (d2) between the annular groove (12) and said lower surface (15). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2638539A1
    申请号:ES201630489
    申请日:2016-04-18
    公开日:2017-10-23
    发明作者:Luis DEL TESO DÍEZ；Beatriz CANALES RODRIGUEZ
    申请人:Nitrogas Group S L；Nitrogas Group SL；
    IPC主号:
    专利说明:

    "Gas cylinder"
    5SECTOR OF THE TECHNIQUE
    The present invention relates to pressurized gas cylinders, and more specifically to those pressurized gas cylinders that comprise safety to prevent explosion and
    10 accidents that can cause gas cylinders in the event of exceeding the working conditions for which they are designed.
    PREVIOUS STATE OF THE TECHNIQUE
    15 Gas cylinders are widely used in industry, and comprise a jacket
    or hollow main body and closed at one end, and a piston that moves linearly with respect to the main body actuated by an actuating element (for example a die). The main body, together with the piston, defines a gas chamber that houses a
    20 pressurized gas.
    The gas cylinder is set so that the piston accompanies a press die on a programmed route and makes a maximum displacement (a nominal stroke). If the piston is caused to make a displacement greater than the displacement for the
    25 which is designed (phenomenon known as overcarrera), or encounters an obstacle (screw, tool, etc.) during its journey, there is a risk of causing an explosion of the gas cylinder due to the breakage of the main body due to the impact of the press die.
    30 There are different solutions to avoid this problem, or at least to minimize the risk, and most of them consist in causing gas leakage from the gas chamber when the piston exceeds its nominal stroke.


    In patent documents WO2010102994A1 and EP2177783A2 for example, a gas cylinder with such a solution is described. The gas cylinders disclosed in these documents comprise an annular body (or bushing) disposed between the main body and the piston, which only moves directly actuated by the actuating element. The annular body comprises a safety elevation that protrudes from the main body, such that the actuating element contacts said safety elevation before contacting the main body. An o-ring is arranged between the main body and the annular body to provide a seal between the two and prevent gas leakage 10 between them. The main body comprises a recess in an inner surface, and when the actuation element contacts the safety lift, causing the displacement of the annular body pushed by the actuation element, the O-ring also moves and reaches the height of said break. Upon reaching that height, the tightness between the main body and the annular body is lost, and the gas present in the chamber of
    15 gas is evacuated from said gas chamber between both bodies.
    EXHIBITION OF THE INVENTION
    The object of the invention is to provide a gas cylinder, as defined in the claims.
    The gas cylinder comprises a cylindrical main body comprising an upper opening and an annular groove in an outer surface that extends along the entire
    25 circular contour of said outer surface and which serves to mount the gas cylinder in its operative position, and a linearly and longitudinally movable piston inside the main body, which defines a gas chamber with pressurized gas inside inside of the main body, together with said cylindrical body, and protruding from the main body through the upper opening.
    The gas cylinder further comprises a bushing arranged between the piston and the main body, a ring disposed between the bushing and the main body for coupling said


    bushing to said main body, and a safety lift formed as a vertical extension of the bushing and protruding from an upper surface of the main body. Thus, if the piston is forced, by means of a press (in particular a die of a press), to move beyond a maximum displacement
    5 predetermined (nominal stroke), a phenomenon known as overcarriage, the die contacts said safety lift before contacting the main body, and this fact can be used to prevent an explosion of said main body (or to reduce the risk of there is an explosion).
    The distance between the ring and a lower surface of the main body, opposite the upper surface of said main body, is less than the distance between the annular groove of the main body and said lower surface of said main body. Thus, for the same length of the gas cylinder, which is usually imposed by regulations regarding gas cylinders (for example VDI 3003 and ISO1191) and the customer,
    The height of the main body of the cylinder can be reduced in height, since the part of the main body required on the annular groove can be greatly reduced. This fact makes it possible to increase the distance between an upper surface of the safety lift and the upper surface of the main body, requiring a larger overcarriage so that the die that pushes the piston contacts the main body.
    20 As a consequence, the risk of causing an explosion of the main body due to direct contact between the die and said main body is decreased.
    These and other advantages and features of the invention will become apparent in view of the figures and the detailed description of the invention.
    DESCRIPTION OF THE DRAWINGS
    Figure 1 shows a preferred embodiment of the gas cylinder of the invention, with the piston in its extended position.
    Figure 2 shows the gas cylinder of Figure 1, with the piston offset the stroke


    nominal.
    Figure 3 shows the gas cylinder of Figure 1, in an overcarriage position in which the deformable area of the bushing has been broken.
    5 Figure 4 shows the gas cylinder of Figure 1, when the piston rise speed is high.
    Figure 5 shows detail A of Figure 1.
    10 Figure 6a shows another embodiment of the gas cylinder of the invention, with the piston in its extended position.
    Figure 6b shows the gas cylinder of Figure 6a, in an overcarriage position in which an annular groove of the main body and an annular groove of the bushing are facing each other.
    Figure 7a shows another embodiment of the gas cylinder of the invention, with the piston in its extended position.
    Figure 7b shows the gas cylinder of Figure 7a, in an overcarriage position where the deformable area of the bushing has been broken.
    25 DETAILED EXHIBITION OF THE INVENTION
    A preferred embodiment of the gas cylinder 100 of the invention is shown in Figures 1 to 4. The gas cylinder 100 comprises an annular main body 1 and a piston 2 partially housed inside the main body 1, concentric to said main body 30, and which can be moved linearly and longitudinally with respect to the main body 1, in a axial direction 9 (both ways). The main body 1 comprises a base 19 and an upper opening at the opposite end of the base 19, allowing the


    upper opening the displacement of the piston 2, and said piston 2 protruding from the main body 1 through said upper opening. The main body 1 further defines a gas chamber 10 therein, together with the piston 2, where pressure gas is provided, which is delimited by the interior of the main body 1 and by the piston 2.
    5 The main body 1 further comprises an annular groove 12 on an outer surface 13, which extends along the entire circular contour of said outer surface 13 and which is adapted to be used in the assembly of the gas cylinder 100 in its operational position, also used to keep it in position. A mounting tool does not
    10 shown in the figures is coupled to this type of annular grooves 12, to keep the gas cylinder 100 in said position.
    The gas cylinder 100 further comprises a bushing 3 disposed between the piston 2 and the main body 1, a ring 4, preferably metal, arranged between the bushing 3 and the main body 1, for coupling, and keeping coupled, said bushing 3 to said main body 1, and a safety lift 30 formed as a vertical extension of the bushing 3. The safety lift 30 axially protrudes from an upper surface 14 of the main body 1, such that the bushing 3 (specifically the safety lift 30), is contacted before the main body 1 by an actuator
    20 causing the displacement of the piston 2 (preferably a die of a press), when the piston 2 exceeds a nominal stroke previously established (by design). The phenomenon of exceeding said nominal stroke is known as gas cylinder 100 overload (or piston 2 overcarriage).
    25 Being able to contact the safety lift 30 makes it possible to provide a safety against over-racing, to avoid, or try to avoid, an explosion of the gas cylinder 100 due to the pressurized gas disposed in the gas chamber 10 defined by the main body
    1. Contact with the safety lift 30 may cause, for example, a displacement of said safety lift 30, which causes in a manner
    30 determined the generation of an escape route for the pressurized gas of the gas chamber 10, which reduces the risk of an explosion of the gas cylinder 100 due to the breakage of the main body 1 (container) due to an excessive displacement of the piston 2.


    Gas cylinders have a safety distance marked by regulations or by the user. When the piston of the gas cylinder travels its nominal stroke, there is a safe distance between the body and the axle which is usually 3 mm. In the state of the art, the safety lift invades those 3 mm (or the corresponding safety distance), such that, in addition to maintaining the corresponding safety distance between the main body 1 of the gas cylinder 100 and the nominal stroke of the piston 2, when the nominal stroke is exceeded the displacement of the bushing is caused by the fact that the die pushes it when it hits the safety lift, releasing at least part of the gas present in the corresponding gas chamber.
    In the gas cylinder 100 of the invention the safety lift 30 does not invade the safety distance, which is maintained between the nominal stroke of the piston 2 and the safety lift 30 itself. This causes that, unlike what happens in the state of the art, the action on the safety lift 30 is not carried out as soon as the nominal stroke is exceeded, which increases the distance that the press die has to travel beyond the nominal stroke of the piston 2 to act on the main body 1 of the gas cylinder 100, increasing the security against deterioration and / or the explosion of said main body 1 against the prior art solutions. To this end, in the gas cylinder 100 the ring 4 is arranged such that the distance D1 between said ring 4 and a lower surface 15 of the main body 1, opposite the upper surface 14 of said main body 1, is less than the distance D2 between the annular groove 12 of the main body 1 and said lower surface 15 of said main body 1. In this way, thanks to the arrangement between the ring 4 and the annular groove 12, the length L1 of the main body 1 can be reduced , reducing the distance D3 between the upper surface 14 of the main body 1 and the annular groove 12, without varying the maximum length L100 of the gas cylinder 100 (length of the gas cylinder 100 with the piston extended, as shown in Figure 1), which allows maintaining (or even increasing) the safety distance between an upper surface 30a of the safety lift 30 and the nominal stroke of the piston 2, and increasing the distance between a surface upper 30a of the safety lift 30 and the upper surface 14 of the main body 1. The greater this distance the greater the safety of the gas cylinder 100, since the necessary travel of the die is increased


    Press to contact main body 1 (gas container).
    This increase in the distance between the upper surface 30a of the safety lift 30 and the upper surface 14 of the main body 1 is not possible with the designs of the conventional gas cylinders 100, since this fact could only be generated by acting on the corresponding safety elevation (lengthening it), and this would imply reducing the nominal stroke of the piston 2 if you want to maintain the maximum length L100 of the gas cylinder 100, or increase said maximum length L100 if you want to maintain the maximum stroke of the piston 2, aspects that are limited by the regulations (or by the regulations and the user) and that it is not normally possible to change.
    In the preferred embodiment of the invention, the gas cylinder 100 further comprises an annular safety element 5 disposed on the upper surface 14 of the main body 1, surrounding the safety elevation 30 of the bushing 3. In the preferred embodiment the upper surface 30a of the upper elevation 30 and an upper surface 50 of the safety element 5 are at the same level, as shown for example in Figure 5, that is, the distances between the base 19 of the main body 1 and the point of said surfaces 30a and 50 further from said base 19 are equal. Thus, if the piston 2 exceeds its nominal stroke and the displacement of the bush 3 is also caused due to a thrust provided by the corresponding actuation element, said actuation element also hits the safety element 5 before contacting the main body 1. The safety element 5 moves in solidarity with the bushing 3, but is formed by a deformable material (without memory) or breakable, such as a plastic material, for example, such that when the actuating element collides against the security element 5, said security element 5 is deformed or broken. It could be the case that the piston 2 exceeds its nominal stroke but the actuation element does not reach the main body 1, but a user may not realize this fact and would not act accordingly (to correct this fact
    or even to replace the gas cylinder). However, thanks to the safety element 5, in that case, in the gas cylinder 100 of the invention the safety element 5 would be damaged (deformed or broken) and a user could detect it with the naked eye, thus detecting that the piston 2 has exceeded its nominal career and being able to act accordingly,


    regardless of whether or not the actuation element hits the main body 1 of the gas cylinder 100. Figure 3 shows the safety element 5 split into two parts 51 and 52 (broken), due to the action of the acting element about him.
    In the preferred embodiment, moreover, the upper surface 50 of the security element 5 is adapted to prevent any element from being deposited thereon. It is not anomalous the case in which accidentally some element (a screw or nut for example) is arranged on the main body 1, which can affect the travel of the piston 2, in particular if the height of said element enters the path piston operating
    2. With said upper surface 50 this possibility is avoided, since said element could not be maintained on the security element 5. In said preferred embodiment the upper surface 50 of the security element 5 comprises an area 50a inclined towards the outside of the cylinder of gas 100, the distance between said upper surface 50 and the upper surface 14 of the main body 1 being smaller the further said upper surface 50 moves away from the piston 2, although in other embodiments said upper surface 50 could have a different configuration (such as the entire upper surface 50 is inclined for example, or other configurations).
    In the preferred embodiment, the gas cylinder 100 further comprises sealing means 7 (an O-ring for example) disposed between the main body 1 and the bushing 3, to provide a tight seal between said main body 1 and said bushing 3 and prevent gas leakage from the gas chamber 10 between said main body 1 and said bushing 3. The main body 1 comprises an alteration 16 on its inner surface 16a defining the gas chamber 10, and the bushing 3 comprises a deformable zone 31 which deforms when it contacts the alteration 16 and protrudes from a lower surface 39 of said bushing 3. The bushing 3 comprises a housing 32 for the sealing means 7, on the deformable zone 31, and when the deformable zone 31 contacts the alteration 16, said deformable zone 31 is deformed, or broken, thus modifying said housing 32. By modifying said housing 32 the tightness offered by the m A number of seals 7, and at least part of the gas present in the gas chamber 10 escapes between the main body 1 and the sleeve 3.


    In another embodiment of the gas cylinder 100 of the invention, shown by way of example in Figures 6a and 6b, the bushing 3 does not comprise a deformable zone. Instead it comprises an annular groove 38 facing the main body 1, and said main body 1 5 in turn comprises an annular groove 18 facing the sleeve 3, where the sealing means 7 are housed. The main body 1 and the sleeve 3 they are configured in such a way that the annular grooves 18 and 38 face only when the piston 2 exceeds its nominal stroke, and when the sealing means 7 are faced they are not able to prevent gas leakage (see figure 6b), decreasing the risk of a
    10 explosion of the main body 1 due to excessive pressure increase in the gas chamber 10.
    The deformable zone 31 is at the opposite end of the bushing 3 to the lifting element 30, and the alteration 16 and said deformable zone 31 are configured to come into contact 15 when the bushing 3 travels as a result of a piston 2 overcarriage. In this way, when there is an overload, in addition to the safety discussed above, at least part of the gas present in the gas chamber 10 is escaped, avoiding or greatly reducing the risk that the gas in said gas chamber 10 reaches high pressures that could result in an explosion of the gas cylinder 100 (of the body
    20 main 1).
    If the piston 2 is caused to rise at a higher speed for which it is designed, there is a risk of causing a rupture of the piston 2, thus being able to leave said piston 2 fired from the main body 2. Solutions for this problem are known, such as
    An example is disclosed in WO9941520A1. This document discloses a solution to reduce the speed of a piston that is moving at high speed to zero when there is a failure in the use of the gas cylinder, and said solution comprises breakable means to prevent ejection of the piston from the body main of said gas cylinder.
    To avoid or reduce this risk, the gas cylinder 100 of the invention can comprise, as in the case of the preferred embodiment for example, a bushing 3 defining


    an annular housing 33 and an annular groove 34. The annular housing 33 is delimited between the bushing 3 itself and the piston 2, and the gas cylinder 100 comprises sealing means 8 housed in said annular housing 33 to prevent gas leakage of the gas chamber 10 through a possible gap between the bushing 3 and the piston 2. The annular groove 34 is delimited between the bushing 3 itself and the main body 1, and the bushing 3 comprises an annular zone 35 between said annular groove 34 and annular housing 33. The annular housing 33, the annular groove 34 and the annular zone 35 are configured such that when the bushing 3 supports a force equal to or greater than a predetermined value, said annular zone 35 is broken at least in part by opening a track 36 connecting the piston 2 with the main body 1 through the bush 3 and passing through the annular housing 33 and the annular groove 34, at least part of the gas escaping present in the gas chamber 100 by said route 36 towards the outside of the gas cylinder
    100. The track 36 can also be generated when there is a piston 2 overcarriage that causes the deformable zone 31 to break (as shown in the example in Figure 3), or it can be generated without the deformable zone 31 being broken or broken. deformed (as shown by way of example in figure 4).
    Thus, in situations where the bushing 33 withstands high pressures, due to said rupture of the annular zone 34 and said gas evacuation the risk of said gas cylinder 100 exploding is reduced or avoided. This excess pressure can occur, for example, in the event that the piston 2 tends to move in an outward direction of the main body 1 with excessive speed or even when the piston 2 travels a stroke greater than that designed (overcarrera). The predetermined value of the force depends on the gas cylinder 100 that is used at all times, in particular its configuration and the maximum force that said gas cylinder 100 must withstand.
    In another embodiment of the gas cylinder 100 of the invention, shown by way of example in Figures 7a and 7b, to facilitate the alteration 16 cooperates in some circumstances so that the annular zone 35 is broken at least in part, opening the path 36 commented above. When it is intended to exceed the nominal stroke of the piston 2, said piston 2 collides with the alteration preventing said additional displacement, and that generates excessive pressure that facilitates the rupture of said annular zone 35 (which is the weakest zone).

    权利要求:
    Claims (8)
    [1]
    1. Gas cylinder comprising a cylindrical main body (1) comprising an upper opening and comprising an annular groove (12) extending along the entire circular contour of an outer surface (13) of said body main (1) and used to mount the gas cylinder (100) in its operative position, a piston (2) partially housed in the main body (1) which together with the main body (1) defines a gas chamber ( 10) inside said main body (1), which is linearly and longitudinally movable and protruding from the main body (1) through 10 of the upper opening, a bushing (3) disposed between the piston (2) and the main body (1), a ring (4) disposed between the bushing (3) and the main body (1) for coupling said bushing (3) to said main body (1), and a safety lift (30) formed to vertical extension mode of the bushing (3) and axially protruding from an upper surface ( 14) of the main body (1), characterized in that the distance
    15 (D1) between the ring (4) and a lower surface (15) of the main body (1), opposite the upper surface (14) of said main body (1), is less than the distance (D2) between the annular groove (12) of the main body (1) and said lower surface (15) of said main body (1).
    A gas cylinder according to claim 1, comprising a safety element (5) disposed on the upper surface (14) of the main body (1) surrounding the bushing (3), said security element (5) being of a deformable material without memory, or breakable, before blows.
    A gas cylinder according to claim 2, wherein the security element (5) comprises an upper surface (50) adapted to prevent any element from being deposited on it.
    [4]
    4. A gas cylinder according to claim 3, wherein the upper surface (50) of the
    The safety element (5) is inclined with the distance between said upper surface (50) and the upper surface (14) of the main body (1) being smaller the further said upper surface (50) moves away from the piston (2).

    [5]
    5. Gas cylinder according to any one of claims 1 to 4, comprising
    sealing means (7) between the main body (1) and the bushing (3) for
    provide a tight seal between both bodies (1, 3) and prevent gas leakage from the
    5 gas chamber (10), the main body (1) comprising an alteration (16) in its
    inner surface (16a) defining the gas chamber (10) and comprising the bushing
    (3) a deformable zone (31) that deforms when it contacts the alteration (16)
    breaking the tightness between the main body (1) and the bushing (3)
    provided by the sealing means (7), said alteration (16) and said
    10 deformable zone (31) configured to come into contact when the bushing (3) is
    displaces as a result of a piston overcarriage (2).
    [6]
    6. Gas cylinder according to claim 5, wherein the deformable zone (31) is
    configured to break when hitting the alteration (16) of the main body (1),
    fifteen the bushing (3) comprising a housing (32) where the means of
    tightness (7) and which is delimited at least in part by the deformable zone (31),
    said housing (32) being modified when said deformable zone (31) is broken and
    thus causing the loss of tightness offered by the sealing means
    (7).
    twenty
    [7]
    7. Gas cylinder according to claim 5, wherein the deformable zone (31) is
    configured to deform when hitting the alteration (16) of the main body (1),
    the bushing (3) comprising a housing (32) where the means of
    tightness (7) and which is delimited at least in part by the deformable zone (31),
    25 said housing (32) being modified when said deformable zone (31) is deformed and
    thus causing the loss of tightness offered by the sealing means
    (7).
    [8]
    8. Gas cylinder according to any one of claims 1 to 7, wherein the bushing (3)
    30 defines an annular housing (33) delimited between the bushing (3) and the piston (2),
    the cylinder (100) comprising sealing means (8) arranged in said
    annular housing (33) to prevent gas leakage from the gas chamber (10) between the
    Bushing (3) and piston (2).
    [9]
    9. A gas cylinder according to claim 8, wherein the bushing (3) defines an annular groove (34) delimited between the bushing (3) and the main body (1), the bushing (3) comprising an annular zone ( 35) between said annular groove (34) and the annular housing (33), the annular housing (33), the annular groove (34) and the annular area (35) being configured such that when the bushing (3) supports a force equal to or greater than a predetermined value, said annular zone (35) is broken at least in part by opening a path (36) that connects the piston (2) with the main leather (1) through the
    10 bushing (3).
    [10]
    10. A gas cylinder according to claim 9, wherein the track (36) crosses the annular housing (33) and the annular groove (34).

     Fig. 1 

     Fig 2 

     Fig. 3 

     Fig. 4 

     Fig. 5 

     Fig. 6a 

     Fig. 6b 

     Fig. 7a 

    Fig. 7b
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    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201630489A|ES2638539B1|2016-04-18|2016-04-18|Gas cylinder|ES201630489A| ES2638539B1|2016-04-18|2016-04-18|Gas cylinder|
    EP17382105.9A| EP3236102B1|2016-04-18|2017-03-01|Gas cylinder|
    ES17382105T| ES2713485T3|2016-04-18|2017-03-01|Gas cylinder|
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