• 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:
    The invention can be used for sealing pipelines, along which liquid is transported under pressure. The purpose of the invention is to increase the reliability of the gasket by improving the fastening and increasing the sealing properties. The outer cylindrical or conical surface (P) of the sealing element of the radial compression diverges relative to the inner conical P. The gasket 2 has an external flange 8 of the fastening from the external cylindrical P. The outer protrusion 12 is made with a diameter greater than the diameter of the inner protrusion, and is located opposite the collar 8. Between the protrusions there is an annular groove. The protrusion 12 is made with a trapezoidal cross-section, tapering towards the inner P. The width of the larger base of the protrusion 12 is equal to the width of the collar 8. The end of the P gasket 2 is formed from the inner protrusion by flat P 18, 19, which passes into the lobe located between them and protruding relative to them . Internal P 16 is made in the form of a conical P, which transforms into a cylindrical one. A projection 20 of a triangular section is formed by P 16, 19 and is made on P 15. P protrusion 12 and P 16 are subjected to only compressive forces, which increases the service life of gasket 2. 2 Cp. f-ly, 4 ill.
    公开号:SU1521288A3
    申请号:SU843805277
    申请日:1984-10-26
    公开日:1989-11-07
    发明作者:Бюше Клод；Лагаб Андре
    申请人:Понта-Муссон Са (Фирма)；
    IPC主号:
    专利说明:

     cm
    ten
    15
    20
    The invention relates to a sealing technique and can be used for sealing pipelines, and KOTOpbiM transports liquid under pressure.
    The aim of the invention is to improve the reliability of the gasket by improving the fastening and increasing the sealing properties.
    Figure 1 shows the connection of pipelines, section; figure 2 - we offer gasket, section; on -fig.Z and 4 - the same, execute options-g
    NIA.i
    The hermetic joint is formed by the inserted end 1 of the tube T1, the annular sealing gasket 2 and the coupling 3 of the tube T2, and the tubes T1 and T2 have a common axis X-X. The front end of the coupling 3 immediately behind the flange 4 is made up of the annular groove-5. Behind the wall 6 of the groove 5, perpendicular to the axis XX of the axis X, there is an internal cylindrical wall 7 of the coupling 3, whose diameter is less than the internal diameter of the groove 5, the wall 6 of the groove 5 has a height h.
    The sealing gasket 2 has on its outer surface a shoulder 8 of the fastener with an outer surface of a cylindrical shape and with a width A corresponding to the shape and width of the groove 5, and a sealing body 9, the outer surface 10 of which has the shape of a cylinder with axis Х-Х. The fastening flange 8 is connected to this body by means of a transverse flange 11, which forms a step between the peripheral surfaces of the collar 8 and the body 9. The outer diameter of the fastening collar 8 corresponds to the inner diameter of the groove 5, and the outer diameter of the body 9 corresponds to the inner diameter
    35
    40
    The sides of the clutch bottom 13 are characterized in that the first inner surface 14, forming an angle of approximately 35, passes into the second inner surface 15 parallel to the axis of the gasket and ending with the inner surface 16 in the shape of a truncated cone, forming an angle of approximately 20 with the axis of the gasket. The opposite shoulder, i.e. The flange of the body 9 facing the bottom 13 of the coupling is characterized in that there is an annular thickening 17 protruding from this flange and two annular surfaces 18 and 19 located on this and the other side of the thickening 17. The surface 19 forms a C-surface 16 a small triangular sponge 20 having the shape of a sawing tooth. The rib 21 located at the junction of surfaces 14 and 15 has a diameter x, the size of which is less than the minimum diameter of the protrusion 12. In addition, there is a triangular groove 22 in the sealing gasket between the protrusion 12 and the body 9 og limited dihedral angle formed by the end face 23 of the protrusion 12 and the surface 14 of the body 9.
    The minimum radial thickness e of the gasket 2 at the bottom of the groove 22 is several times the height of the protrusion (step) of the collar 8.
    The bottom 13, with which the inner cylindrical wall 7 of the sleeve 3 terminates, leaves a wide space in the axial direction for the body 9 of the gasket 2.
    The installation of a hermetic joint is carried out as follows.
    First, a sealing gasket 2 is inserted into the coupling 3 of the tube T2. After an elastic deflection of its shoulder 8 to the crepe meter of the wall 7 of the coupling, On its inner body, it enters the groove 5 provided inside the coupling 3 and is fixed there; Then, an insertion end 1 of the tube T1 is installed coaxially with the sleeve T2 of the pipe. When the end is inserted into the coupling, the protrusion 12 is compressed, as a result of which the fastening shoulder 8 is pressed against the rear wall of the groove 3 of the coupling 3, thus ensuring that the gasket 2 is firmly fixed inside the coupling 3 to prevent the collar 8 from moving beyond the groove 5 with further insertion of the end into the coupling 3 and, consequently, the displacement of the gasket 2 to the bottom 13 of the coupling especially in the case.
    the surface of the gasket is made of an annular protrusion 12 of a trapezoidal shape, forming a radial continuation of the collar B, i.e. located directly opposite the collar 8, the inner diameter of which is less than the minimum outer diameter of the inserted end 1, and the width P of the larger base of the protrusion 12 of a trapezoidal shape is equal to the width A of the collar 8.
    The body of the trapezoidal section, directly behind the protrusion 12, has a small base on the side of the protrusion 12 and a large base with
    0
    five
    0
    five
    0
    five
    0
    The sides of the clutch bottom 13 are characterized in that the first inner surface 14, forming an angle of approximately 35, passes into the second inner surface 15 parallel to the axis of the gasket and ending with the inner surface 16 in the shape of a truncated cone, forming an angle of approximately 20 with the axis of the gasket. The opposite shoulder, i.e. The flange of the body 9 facing the bottom 13 of the coupling is characterized in that there is an annular thickening 17 protruding from this flange and two annular surfaces 18 and 19 located on this and the other side of the thickening 17. The surface 19 forms a C-surface 16 a small triangular sponge 20 having the shape of a sawing tooth. The rib 21 located at the junction of surfaces 14 and 15 has a diameter x, the size of which is less than the minimum diameter of the protrusion 12. In addition, there is a triangular groove 22 in the sealing gasket between the protrusion 12 and the body 9, o boundedness dihedral angle formed by the end face 23 of the ridge 12 and the body surface 14 September.
    The minimum radial thickness e of the gasket 2 at the bottom of the groove 22 is several times the height of the protrusion (step) of the collar 8.
    The bottom 13, with which the inner cylindrical wall 7 of the sleeve 3 terminates, leaves a wide space in the axial direction for the body 9 of the gasket 2.
    Installation of a sealed interface as follows.
    First, a sealing gasket 2 is inserted into the coupling 3 of the tube T2. After elastic def.rmatsiya its collar 8 of the mount enters the groove 5, providing
    inside the sleeve 3, and fixed there; Then, an insertion end 1 of the tube T1 is installed coaxially with the sleeve T2 of the pipe. When the end is inserted into the coupling, the protrusion 12 is compressed, as a result of which the fastening shoulder 8 is pressed against the rear wall of the groove 3 of the coupling 3, thus ensuring that the gasket 2 is firmly fixed inside the coupling 3 to prevent the collar 8 from moving beyond the groove 5 with further insertion of the end into the coupling 3 and, consequently, the displacement of the gasket 2 to the bottom 13 of the coupling especially in the case.
    when the radial height h of the collar 8 and the depth of the groove 5 are small compared with the minimum radial thickness e of the body of the sealing gasket and accordingly compared with the maximum radial thickness a of this body at a right angle to its / - flat surface 10,
    In this case, in order to protrusion
    12 fulfilled its barrier function, for the penetration of solid particles (if the pipeline is buried in the ground) or the barrier for air penetration (if the pipeline is air), its internal diameter, in a place located at right angles to its maximum protrusion, should be substantially less than diameter t of the inserted end 1, even when this outer diameter has a minimum value due to dimensional tolerances, but mainly due to the fact that the inner diameter of the protrusion 1 2 is smaller than the outer diameter t inserted This end 1, this leg provides a radial compression and, therefore, the clamping of the fastening collar 8 (opposite the leg) in the groove 5, made in the ufta 3.
    Groove 22 allows Extra rubber, formed as a result of compression of the leg, to find a place for itself without deformation of the gasket body 9, ensuring tightness.
    Further insertion of the insertion end 1 into the sleeve 3 causes a radial contraction of the body 9, which can be freely extended in a direction parallel to the axis enclosed between the outer surface of the insertion end and the inner surface of the coupling, Osc: no shoulder on the inner height of the coupling does not prevent TaKoii Deformations; Indeed, the potential (the spice formed by the wall 7 and the bottom
    13 of the body 9 in the clutch 3, sufficiently spacious in the axial direction for
    This will allow such free elongation. In addition, the mounting of the sealing gasket 2 at the inlet of the coupling 3 is designed to prevent any axial movement of this gasket 2, and the axial elongation of the sealing gasket 2 occurs without displacing the rest of this gasket 2 and can vary depending on its axial compression due to a larger or smaller diameter t of the inserted end 1 within the dimensional tolerances. The sponge 20 makes it possible to seal the uneven, smooth surface of the insertion end, since, after compression, it fills the cavities and closes the projections.
    Q Promotion of the inserted end through the sealing gasket stops when part of this end enters the sleeve 3, the length of which significantly exceeds the axial length
    5 pads 2,
    Due to the combination of the protrusion, flat surfaces 18 and 19 on the end of the body 9, facing the bottom of the coupling 13, and the grooves 22 on the inner surface of the gasket when the body is compressed 9 At the end it does not form an internal fold as a result of the concentration of forces. Due to this combination, the insertion force of the insertion end into the coupling is less than in the known constructions.
    The surface of the protrusion and the surface 16 in the shape of a truncated cone are subjected only to compressive forces, which
    0 increases the service life of the gasket. Thus, due to the combination of the protrusion 12 and the collar 8 opposite to each other and the absence of a shoulder on the inner surface of the sleeve, limiting the axis 5
    The extension of the body 9, the effort required to mount the joint, is greatly reduced.
    Due to the presence of the groove 22, the insertion force of the insertion end 1 into the sleeve 3, due to the compression of the sealing gasket 2, is significantly reduced compared to the force required to insert the same insertion end 1 into the same coupling 3, but when using a radial seal gasket type of compression.
    Due to the combination of the protrusion 12 and the fastening collar 8, to ensure a firm fastening of the collar 8 c. To the groove 5, when inserting the insertion end, it is not necessary to provide a shoulder on the inner surface of the coupling to create an axial stop for the sealing body to provide axial stability of the sealing gasket in the coupling.
    Due to the elimination of the support for the body 9 on the inner surface of the coupling 3, it can freely extend. hinge in the annular space formed by the wall 7 and the bottom 13 between the inserted end 1 and the sleeve 3, which allows insertion of the insert. an end with a force that increases quite a bit with an increase in the outer diameter of the insertion end within the dimensional tolerances, since the connection mounting force is mainly due to the compression force of the body 9,
    By reducing the force required to mount the joint, the deviations of the dimensions of the inserted kenz and the coupling can reach several millimeters, and the satisfactory tightness of the joint is maintained at operating pressures in the order of 40-60 bar. Thus, deviations of sizes up to 8.5 mm with a diameter of the inserted End of 150 mm and up to 11.5 microns with a diameter of the inserted end of 600 mm are possible.
    Due to the small height of the protrusion H, limited by the protrusion 1 2, it is possible to use a protrusion, the radial thickness of which and, consequently, the depth of the groove where it enters may be less. This reduces the radial size i of the coupling 3.
    Due to the protrusion 12 and the fastening collar 8, the body 9 is protected from damage due to contact with oxygen in the case of air pipelines or with solid particles in the case of underground pipelines.
    By protecting the body, 9 from exposure to physicochemical agents, the risk of premature aging of the elastomer is eliminated.
    By increasing the dimensional tolerances of both the inside diameter of the sleeve and the outer diameter of the insert end, it is possible to bore the chill molds used for the manufacture of pipes by the centrifugal method, since the size requirements are less rigid. As a result, the life of these molds is increased.
    When inside the coupling there is a frusto-conical wall extending to the bottom of the coupling, this outer surface 24 of the body 9 of the gasket makes an appropriate shape.
    0
    five
    0

    five
    Q
    five
    0
    five
    50
    five
    in the form of a truncated cone, widened from the securing of the fastening collar 8, with a small base on the side of this mounting collar 8, which provides the best axial expansion of the body 9 during its radial compression and, consequently, the constant force of insertion of the inserted end 1 into coupling 3 regardless of the outer diameter of the insertion end 1 within the dimensional tolerances.
    The groove may be made trapezoid-shaped, as a result of which the groove is made wider and the entire gasket lengthens, although the dimensions of the body 9 remain the same. This increases the weight of the gasket, but reduces its resistance to displacement inside the pipe.
    权利要求:
    Claims (2)
    [1]
    Invention Formula
    . 1. An annular sealing gasket for cast iron pipes with a narrow one. an inserted bunk in one pipe and a bell in the other, cast in a mold by a centrifugal method, containing a sealing element of radial compression with an outer cylindrical or conical surface that diverges with a relative inner conical surface, with a ring of fastening on the outer surface in the form collar, with an outer radial inwardly protruding gasket annular protrusion and an inner annular protrusion on the inner surface, and the outer protrusion is made with a diameter larger than the innermost protrusion Pa, located opposite the shoulder, and between the protrusions formed annular groove of ayuscha difference ga me. "in that, in order to increase reliability. the outer protrusion is made with a trapezoidal cross-section, tapering to the inner surface, the width of its larger base is equal to the width of the collar, and the front surface of the gasket is formed from the inner protrusion by flat surfaces passing into the lobe located between them and protruding relatively of them.
    [2]
    2. The gasket according to claim 1, about tl and which is so that the inner surface of the gasket is made in the form of a conical surface, the transition to cylindrical, with a diameter less than the diameter of the outer protrusion.
    152128810
    3, Gasket according to PP, 1 and 2, o t — developed by a conical surface and characterized by the inner flat surface of the bore cylindrical surface of the gauge. is filled with a triangular protrusion about
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    引用文献:
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    FR2396914B1|1977-07-08|1982-01-15|Everitube|
    JPS5814311Y2|1977-11-22|1983-03-22|
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    FR2621376B1|1987-10-01|1989-12-22|Pont A Mousson|SEALING FOR TELESCOPIC LOCKED GASKETS|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    FR8317444A|FR2554205B1|1983-10-28|1983-10-28|SEALING FOR CAST IRON PIPE JOINTS|
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