WO2019080894A1 - Structure de raccordement de type à bague de serrage pour tuyau métallique - Google Patents

Structure de raccordement de type à bague de serrage pour tuyau métallique

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Publication number
WO2019080894A1
WO2019080894A1 PCT/CN2018/111851 CN2018111851W WO2019080894A1 WO 2019080894 A1 WO2019080894 A1 WO 2019080894A1 CN 2018111851 W CN2018111851 W CN 2018111851W WO 2019080894 A1 WO2019080894 A1 WO 2019080894A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring
snap ring
groove
metal
sealing
Prior art date
Application number
PCT/CN2018/111851
Other languages
English (en)
Chinese (zh)
Inventor
周庆念
余张法
Original Assignee
周庆念
余张法
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 周庆念, 余张法 filed Critical 周庆念
Publication of WO2019080894A1 publication Critical patent/WO2019080894A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/02—Sealings between relatively-stationary surfaces
    • F16J15/06—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces
    • F16J15/10—Sealings between relatively-stationary surfaces with solid packing compressed between sealing surfaces with non-metallic packing
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/03—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings placed in the socket before connection
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L21/00—Joints with sleeve or socket
    • F16L21/08—Joints with sleeve or socket with additional locking means

Definitions

  • the invention relates to a metal pipe connection structure, in particular to a metal pipe snap ring connection structure.
  • Fluid delivery pipes are often used in the construction and industrial sectors.
  • Conventional fluid delivery pipes are connected by pipe fittings, which are usually threaded to form various piping systems.
  • pipe fittings which are usually threaded to form various piping systems.
  • the installation efficiency of the threaded connection is not high, and there are certain requirements for the working space, and a series of problems such as preventing leakage at the joint are also solved.
  • connection structure of the snap-in metal pipe fittings has been gradually developed.
  • the thin-walled metal tube design uses a special tool to crimp and deform the thin wall, so that the pipe connection is completed instantaneously.
  • the crimping tool simultaneously presses the two portions of the socket section M and the sealing groove N, and the sealing groove portion is compressed, forcing the O-ring seal in the groove to closely adhere to the steel pipe.
  • the function of sealing and stopping water is that the socket section M is pressed by the hexagon, and the steel pipe and the pipe fitting are pressed and deformed, and the rigidity of the metal material itself is utilized to resist the drawing.
  • the structure is simple in construction, short in operation time, no threaded connection of the joint, no complicated threading operation, no high temperature open flame, no pre-treatment during welding, no oil pollution or welding slag pollution during construction cutting or joining.
  • the key can be made of various metal materials, such as stainless steel, copper, carbon steel pipe, and the like.
  • stainless steel or copper fittings can be used, but this also leads to an increase in material costs. Therefore, in the current card-type connecting pipeline, more carbon steel galvanized thin-walled tubes are still used, and the connection method is still stuck-type, so that the cost performance is higher than that of the stainless steel tube and the copper tube.
  • Fig. 1B shows an enlarged view of a portion B of the snap-in metal pipe connecting structure of Fig. 1A.
  • the socket portion M of the snap-in tubular member 91 is subjected to hexagonal pressing, the galvanized carbon steel pipe 92 and the pipe member are frictionally deformed, resulting in the outer wall of the galvanized carbon steel pipe 92 and the inner wall of the pressed tubular member 91.
  • the galvanized layer is destroyed, and the water flow F in the pipe flows from the gap of the cannula to the hex extrusion deformation portion, and the galvanized layer of the inner wall of the galvanized carbon steel pipe 92 and the pressed pipe member 91 has been destroyed.
  • Carbon steel pipes and snap-in pipe fittings are eroded and oxidized under the action of water flow, thereby making the service life of the pipe greatly reduced.
  • the insertion end easily causes damage or displacement of the rubber sealing ring, resulting in a tight seal.
  • the present invention provides a metal pipe snap ring type connecting structure, comprising: a snap ring type pipe member having at least a sealing groove and a snap ring groove on an inner circumferential surface of the socket end, wherein the snap ring groove is located in the sealing groove An axially outer side; a sealing ring disposed in the sealing groove; a guiding ring disposed in the snap ring groove and located axially outside the sealing ring, the inner diameter of the guiding ring being smaller than the inner diameter of the sealing ring and larger than the metal tube An outer diameter; and a metal snap ring having a notched annular shape disposed in the snap ring groove and located axially outward of the guide ring, wherein the pressure is utilized when the metal tube is inserted into the socket of the snap ring tube
  • the connecting tool presses the sealing groove of the snap ring type pipe fitting and the snap ring groove to deform, so that the metal pipe is deformed correspondingly by the tightening deformation of the snap ring, thereby achieving the
  • a guide ring disposed in the snap ring groove and located between the seal ring and the snap ring may be further included, the inner diameter of the guide ring being smaller than the inner diameter of the seal ring and larger than the metal The outer diameter of the tube.
  • the guide ring is made of polyethylene.
  • the anti-seepage ring disposed on the axially outer side of the snap ring is further included, so that the snap ring type pipe and the metal pipe are realized from the axially outer side when the snap ring type pipe member is pressed.
  • the anti-seepage ring is made of engineering plastic.
  • the metal pipe is a galvanized pipe.
  • the inner side of the metal snap ring has a toothed structure.
  • the inner circumferential surface of the metal snap ring has a tapered surface.
  • the width of the cross section of the seal ring is greater than the height. Further preferably, the elliptical cross section of the cross section of the sealing ring.
  • the invention also provides a metal pipe snap ring type connecting structure, comprising: a snap ring type pipe member, the bearing end is provided with a sealing groove and a snap ring groove; a sealing ring is disposed in the sealing groove; the snap ring, It has a ring-shaped annular shape so as to be disposed in the snap ring groove and facilitates compression deformation; and a guide ring disposed in the snap ring groove, the inner diameter of the guide ring being smaller than the inner diameter of the seal ring and larger than the outer diameter of the metal pipe
  • the invention also provides a metal pipe snap ring connection structure, comprising: a snap ring type pipe member, the bearing end is provided with a sealing groove and a snap ring groove; a sealing ring is disposed in the sealing groove; the metal snap ring , which has an annular shape with a notch so as to be disposed in the snap ring groove and facilitate compression deformation; and an anti-seepage ring which is disposed at the outermost axial direction in the socket of the snap ring type pipe, the diameter of the anti-seepage ring is smaller than The diameter of the seal ring is slightly larger than the diameter of the metal tube, so that the seal between the snap ring tube and the metal tube is realized from the axially outer side when the snap ring tube is pressed.
  • the present invention can be blocked by the sealing ring before the fluid penetrating between the snap ring type pipe member and the inserted metal pipe reaches the damaged portion of the galvanized layer, thereby preventing corrosion of the metal pipe, thereby improving the entire The life of the connection structure.
  • the present invention can prevent damage to the seal ring during the insertion of the metal pipe member into the joint structure.
  • 1A is a schematic view showing a connection structure of a snap-in metal pipe fitting in the prior art.
  • Fig. 1B shows an enlarged view of a portion B of the snap-in metal pipe connecting structure of Fig. 1A.
  • FIG. 2 is a half cross-sectional view showing the structure of a snap ring type pipe fitting of the metal pipe snap ring type connection structure of the present invention.
  • FIG. 3 is a half cross-sectional view showing the metal pipe snap ring connection structure of the present invention, in which the inside of the snap ring pipe member has been mounted with a seal ring, a guide ring, a snap ring, and an anti-seepage ring, but has not been assembled with the metal pipe.
  • FIG. 4 is a cross-sectional view showing the metal pipe snap ring connection structure of the present invention, in which the inside of the snap ring pipe member has been installed with a seal ring, a guide ring, a snap ring, an anti-seepage ring, and a metal pipe is inserted and carried out. Crimp assembly.
  • Fig. 5 is an enlarged view showing a portion A of the metal pipe clasp type connection structure of Fig. 4.
  • Fig. 6 shows a toroidal snap ring of the present invention, wherein the right side view is a cross-sectional view of the left side view.
  • Figure 7 shows a ring gear type snap ring of the present invention.
  • the snap ring type pipe fitting 1 of the metal pipe snap ring type connecting structure of the present invention has a socket at one end for inserting a desired metal pipe.
  • the socket of the snap ring type pipe fitting 1 is provided with a seal groove 2 and a snap ring groove 3 in this order from the inside to the outside.
  • the inner diameter of the seal groove 2 and the snap ring groove 3 is larger than the inner diameter of the other portions of the snap ring type pipe member 1 to accommodate the rubber seal ring and the snap ring.
  • the snap ring type pipe fitting 1 shown in the drawing is integrally formed.
  • FIG. 3 is a half cross-sectional view showing the metal pipe snap ring connection structure of the present invention.
  • the seal ring 4, the guide ring 5, the snap ring 6 and the anti-seepage ring 8 have been mounted in the seal groove 2 and the snap ring groove 3 of the snap ring type pipe member 1, but have not been assembled with the metal pipe.
  • the guide ring 5 is not necessary.
  • the guide ring 5 has a circular shape whose inner diameter is smaller than the inner diameter of the seal ring 4 and larger than the outer diameter of the metal pipe 7 to be inserted.
  • Fig. 4 is a cross-sectional view showing the metal pipe clasp type connection structure of the present invention.
  • Fig. 5 is an enlarged view showing a portion A of the snap ring type metal pipe connecting structure of Fig. 4.
  • the sealing ring 4, the guiding ring 5, the snap ring 6 and the anti-seepage ring 8 are sequentially installed in the sealing groove 2 and the snap ring groove 3 of the snap ring type pipe fitting 1, and the metal is inserted.
  • Tube 7 was crimped and assembled.
  • the guide ring 5 has a metal tube 7 which helps to guide the insertion, avoiding damage or moving the sealing ring 4, thereby better ensuring the sealing effect.
  • the inner diameter of the guide ring 5 is smaller than the inner diameter of the sealing ring 4 and larger than the outer diameter of the metal tube 7, thereby achieving a guiding effect on the insertion of the metal tube 7.
  • the guide ring 5 can be made of any suitable material as long as it meets the requirements of strength toughness and corrosion resistance, and produces sufficient deformation under pressure without being damaged. It is preferred to use an engineering plastic such as polyethylene or the like.
  • the anti-seepage ring 8 is not required.
  • the anti-seepage ring 8 has a circular shape and is disposed at the axially outermost side in the socket of the snap ring type pipe member 1. When the snap ring type pipe member 1 is pressed, the anti-seepage ring 8 and the metal pipe 7 are brought into close contact, and the seal is realized from the axially outer side, so that external moisture can be prevented from infiltrating into the snap ring type pipe member 1 to cause corrosion.
  • the diameter of the anti-seepage ring 8 can be set smaller than the diameter of the seal ring 4 and larger than the diameter of the metal pipe 7. At this time, the anti-seepage ring 8 can function as a guide ring (centering the inserted metal pipe 7 to avoid damage or moving the seal ring 4), whereby the guide ring 5 can be omitted.
  • the anti-seepage ring 8 can be made of any suitable material as long as it can satisfy the strength toughness and corrosion resistance requirements, and produces sufficient deformation under pressure without being damaged. It is preferred to use an engineering plastic such as polyethylene or the like.
  • the arrangement order of the seal ring 4, the guide ring 5, the snap ring 6 and the anti-seepage ring 8 shown in the drawing is only a preferred fact.
  • the basic function of the guide ring 5 is to guide the metal tube 7 to be inserted in the center to avoid damage or to move the sealing ring 4.
  • the basic function of the anti-seepage ring 8 is to prevent external moisture from infiltrating into the snap ring tube 1 and causing corrosion.
  • Other arrangements are also possible on request.
  • the guide ring 5 is placed in the axial direction of the seal ring 4 in the socket of the snap ring type pipe member 1.
  • the seepage prevention ring 8 is disposed in the axially outermost side in the socket of the snap ring type tubular member 1.
  • the sealing ring 4 preferably adopts a relatively flat structure, that is, a cross section having a width larger than the height to increase the contact area with the sealed tubular member, thereby improving the sealing effect.
  • a relatively flat structure that is, a cross section having a width larger than the height to increase the contact area with the sealed tubular member, thereby improving the sealing effect.
  • the snap ring 6 has an annular shape with a notch to reduce the inner diameter when subjected to radial compression.
  • the snap ring 6 can take various forms. As an example, Figure 6 shows a toroidal snap ring.
  • the right side view of Fig. 6 is a cross-sectional view of the left side view.
  • the right side view of Fig. 6 shows that the inner circumferential surface of the snap ring 6 has a tapered surface.
  • this is only an exemplary cross section, which may also take the form of a rectangular cross section as shown in FIG.
  • Fig. 7 shows a ring-shaped snap ring having a tooth-like structure distributed in the circumferential direction inside. This toothed structure helps to be inserted into the metal tube when subjected to radial compression to increase the tensile strength. Similarly, the inner peripheral surface structure of the tapered surface of the snap ring 6 shown in Fig. 7 can also be applied to the annular snap ring shown in Fig. 6.
  • the metal pipe snap ring connection structure shown in Fig. 4 is assembled as such. First, the metal pipe 7 is inserted into the socket of the snap ring pipe 1 in which the seal ring 4, the guide ring 5, the snap ring 6 and the anti-seepage ring 8 have been mounted as shown in Fig. 3, and then the retaining tool is used to the snap ring. The seal groove 2 and the snap ring groove 3 on the tubular member 1 are simultaneously compressed to a predetermined size. At this time, the circumferential compression of the sealing groove 2 forces the inner sealing ring 4 to abut against the metal pipe 8 to form a one-side seal, which prevents fluid leakage in the pipe and satisfies the sealing requirements.
  • the snap ring groove 3 is circumferentially compressed, forcing the inner snap ring 6 to be tightly inserted into the metal tube 7 to form a compression groove embedded in the metal tube, which satisfies the pipe pull-out performance.
  • the guide ring 5 is also simultaneously compressed inwardly on the circumference so as to abut against the outer surface of the metal tube 7 and the inner surface of the snap ring tube 1 to form a further seal.
  • the anti-seepage ring 8 is provided, the anti-seepage ring 8 is also simultaneously compressed inwardly on the circumference so as to be in close contact with the outer surface of the metal pipe 7 and the inner surface of the snap-in tubular member 1 to form a further seal.
  • the test data shows that the pull-out force of the snap ring connection of the same specification is 2.2 times or more of the pull-out force of the snap-fit connection.
  • the modified pull-up force of the snap-on connection is the same specification. More than 4 times the pull resistance.
  • the metal pipe snap ring connection structure is only subjected to compression deformation of the seal groove 2 and the snap ring groove 3 (in the same region) on the snap ring type pipe member 1, and the other portions are not deformed.
  • FIG. 5 shows that although the snap ring 6 is tightly embedded in the metal tube 7 to cause the galvanized layer of the outer wall of the galvanized steel pipe to be broken, the water flow infiltrated between the snap ring type pipe member 1 and the inserted metal pipe 7 is reached. The damaged portion of the galvanized layer is blocked by the sealing ring 4, so that the metal tube 7 is not corroded.
  • Figure 5 also shows that although the snap ring 6 is tightly embedded in the metal tube 7 to cause the galvanized layer of the outer wall of the galvanized steel pipe to be broken, the anti-seepage ring 8 forms a seal on the axially outermost side in the socket of the snap ring type pipe member 1.
  • the structure of the present invention allows the connected galvanized steel pipe to not deteriorate in service life due to destruction of the galvanized layer.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

Structure de raccordement de type à bague de serrage pour un tuyau métallique, la structure de raccordement comprenant : un raccord de tuyau (1) de type à bague de serrage, au moins une rainure d'étanchéité (2) et une rainure (3) de bague de serrage étant disposées dans une surface périphérique intérieure au niveau d'une extrémité femelle de celle-ci, et la rainure (3) de bague de serrage étant située axialement à l'extérieur de la rainure d'étanchéité (2) ; une bague d'étanchéité (4) disposée dans la rainure étanche (2) ; une bague de guidage (5) disposée dans la rainure (3) de bague de guidage et située axialement à l'extérieur de la bague d'étanchéité (4), le diamètre intérieur de la bague de guidage (5) étant inférieur à celui de la bague d'étanchéité (4) et étant supérieur au diamètre extérieur d'un tuyau métallique (7) ; et une bague de serrage métallique (6) de forme annulaire avec une encoche de façon à être disposée dans la rainure (3) de bague de serrage et située axialement à l'extérieur de la bague de guidage (5) lorsque le tuyau métallique (7) est introduit en place dans l'extrémité femelle du raccord de tuyau (1) de type à bague de serrage, la rainure étanche (2) et la rainure (3) de bague de serrage du raccord de tuyau (1) de type à bague de serrage sont comprimées pour être déformées à l'aide d'un outil de sertissage, de façon à déformer le tuyau métallique par serrage et de la déformation de la bague de serrage, ce qui permet de réaliser le raccordement étanche entre le tuyau métallique et le raccord de tuyau de type à bague de serrage au moyen de la bague d'étanchéité.
PCT/CN2018/111851 2017-10-26 2018-10-25 Structure de raccordement de type à bague de serrage pour tuyau métallique WO2019080894A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711022022.8 2017-10-26
CN201711022022.8A CN109707928A (zh) 2017-10-26 2017-10-26 金属管道卡环式连接结构

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WO2019080894A1 true WO2019080894A1 (fr) 2019-05-02

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WO (1) WO2019080894A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112113045A (zh) * 2020-10-19 2020-12-22 绍兴康林顿管业有限公司 一种硬密封卡压管件

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CN201621393U (zh) * 2010-01-21 2010-11-03 河南康泰塑业科技有限公司 一种环压加强式薄壁金属管件
AU2014201808B2 (en) * 2006-04-12 2016-02-04 Orrcon Operations Pty Ltd Pipe and pipe joining method
CN205136880U (zh) * 2015-11-06 2016-04-06 苏光彬 金属管道卡环式连接结构
CN208311707U (zh) * 2017-10-26 2019-01-01 周庆念 金属管道卡环式连接结构

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Publication number Priority date Publication date Assignee Title
US4229025A (en) * 1978-04-25 1980-10-21 Perfection Corporation Stab-type coupling
CN2437938Y (zh) * 2000-07-27 2001-07-04 贵州凯撒铝业有限公司 双环锁紧内套式快装管道接头
KR200347218Y1 (ko) * 2004-01-26 2004-04-08 김석윤 배관용 조인트
CN2823753Y (zh) * 2005-05-26 2006-10-04 董阿能 快插接头
CN201748082U (zh) * 2010-06-28 2011-02-16 王德明 快速卡式管接头

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2014201808B2 (en) * 2006-04-12 2016-02-04 Orrcon Operations Pty Ltd Pipe and pipe joining method
CN201621393U (zh) * 2010-01-21 2010-11-03 河南康泰塑业科技有限公司 一种环压加强式薄壁金属管件
CN205136880U (zh) * 2015-11-06 2016-04-06 苏光彬 金属管道卡环式连接结构
CN208311707U (zh) * 2017-10-26 2019-01-01 周庆念 金属管道卡环式连接结构

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