WO2019080896A1 - Structure de raccordement de tuyau métallique à revêtement anticorrosion de haute résistance - Google Patents

Structure de raccordement de tuyau métallique à revêtement anticorrosion de haute résistance

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Publication number
WO2019080896A1
WO2019080896A1 PCT/CN2018/111857 CN2018111857W WO2019080896A1 WO 2019080896 A1 WO2019080896 A1 WO 2019080896A1 CN 2018111857 W CN2018111857 W CN 2018111857W WO 2019080896 A1 WO2019080896 A1 WO 2019080896A1
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WO
WIPO (PCT)
Prior art keywords
snap ring
metal
ring
metal pipe
groove
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2018/111857
Other languages
English (en)
Chinese (zh)
Inventor
周庆念
余张法
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of WO2019080896A1 publication Critical patent/WO2019080896A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • F16L25/00—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00
    • F16L25/10—Sleeveless joints between two pipes, one being introduced into the other
    • 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
    • F16L58/00—Protection of pipes or pipe fittings against corrosion or incrustation
    • F16L58/02—Protection of pipes or pipe fittings against corrosion or incrustation by means of internal or external coatings

Definitions

  • the invention relates to a metal pipe connection structure, in particular to a metal pipe snap ring connection structure with a high-strength anti-corrosion coating.
  • 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.
  • 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 be closely attached.
  • the metal pipe (for example, steel pipe) functions to seal and stop the water.
  • the socket section M is pressed by the hexagon, and the metal pipe and the pipe 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 wall thickness of the snap-in metal pipe fitting must be thin to meet the requirements of sufficient deformation at the time of crimping, and at the same time help to reduce the weight of the product.
  • it must have sufficient strength. Thickening the wall thickness of course helps to improve the strength, but reduces the formation of sufficient deformation and increases the weight of the product. Excessive pursuit of thin walls results in insufficient strength.
  • it is necessary to meet the requirements of fluid corrosion resistance.
  • Stainless steel pipe fittings or copper pipe fittings may be used in piping systems that have certain corrosion resistance requirements (for example, fire sprinkler systems in buildings), but this also leads to an increase in material costs.
  • the amount of material used to connect the pipe is greater than that of the pipe as the connector, and the use of stainless steel or copper pipes results in a more serious cost increase.
  • 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 62 and the pressed pipe member 91 has been destroyed.
  • Carbon steel pipes and fittings are eroded and oxidized under the action of water flow, thereby making the service life of the pipes greatly reduced.
  • the insertion end easily causes damage or displacement of the rubber sealing ring, resulting in a tight seal.
  • the object of the present invention is to provide a metal pipe connecting structure with a high-strength anti-corrosion coating, which can make the connecting pipe itself in the connecting structure have a thin wall thickness, good strength, and thus good crimping deformation performance. At the same time, it has better corrosion resistance.
  • the invention provides a metal pipe connection structure with a high-strength anti-corrosion coating, which comprises a snap ring type pipe, wherein a sealing groove and a snap ring groove are arranged on an inner circumferential surface of the socket end; and a sealing ring is disposed on the And a metal snap ring in a ring shape having a notch, thereby being disposed in the snap ring groove and facilitating compression deformation, wherein the snap ring pipe member is made of a metal pipe base body and covers a high strength of at least an inner wall of the pipe base body The anti-corrosion coating is formed.
  • the sealing groove and the snap ring groove of the snap ring type pipe are pressed by the crimping tool to deform, thereby being tightened by the metal snap ring.
  • the metal tube is correspondingly deformed, whereby the sealing connection between the metal tube snap ring tubes is achieved by the sealing ring.
  • the anticorrosive coating layer is formed of a polyethylene material.
  • the metal pipe base is a thin-walled steel pipe.
  • the snap ring groove is located axially outward of the seal groove.
  • the guide ring is made of engineering plastic.
  • the inner peripheral surface of the metal snap ring has a toothed structure.
  • the inner peripheral 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. More preferably, the elliptical cross section of the cross section of the sealing ring.
  • the connecting pipe itself in the connecting structure has a thin wall thickness and good strength, and thus has good performance.
  • Crimp deformation performance while having better corrosion resistance. Therefore, ordinary metal materials can be used to achieve good crimp deformation properties, thereby improving sealing performance, reducing material cost, and reducing product weight.
  • the order of the sealing groove and the snap ring groove is adopted, so that the fluid which penetrates between the snap ring pipe and the inserted metal pipe can reach the galvanizing.
  • the damaged part of the layer is blocked by the sealing ring before it will cause corrosion to the metal pipe, thereby increasing the life of the entire connecting 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 construction of a snap ring type pipe joint structure with a high strength anticorrosive coating according to the present invention.
  • Figure 3 is a half cross-sectional view of the metal pipe connection structure of the present invention with a high-strength anti-corrosion coating, wherein the inside of the snap-in pipe fitting has been installed with a sealing ring, a guide ring, a metal snap ring, an anti-seepage ring, but not yet Assemble with metal tubes.
  • FIG. 4 is a cross-sectional view showing a metal pipe connection structure with a high-strength anti-corrosion coating of the present invention, in which a seal ring, a guide ring, a metal snap ring, an anti-seepage ring, and an insertion have been installed inside the snap-in pipe fitting.
  • Metal tube and crimped assembly
  • Fig. 5 is an enlarged view showing a portion A of the metal pipe connecting structure of Fig. 4 with a high-strength anticorrosive coating.
  • 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 member 1 of the metal pipe joint structure with high strength anticorrosive coating of the present invention is formed of a metal pipe base body 101 and a high strength anticorrosive coating layer 102 covering at least the inner wall of the pipe member base.
  • the high-strength anti-corrosion coating 102 may cover only the inner wall of the metal pipe base 101 to provide corrosion resistance to the fluid to be conveyed.
  • the high strength anticorrosive coating 102 can also be applied to the entire surface of the metal pipe base 101 to provide a comprehensive corrosion resistance.
  • the high strength anticorrosive coating 102 can be formed from a suitable material, such as high strength polyethylene.
  • the high strength anticorrosive coating 102 can be formed on the metal pipe base 101 by any suitable process.
  • the metal pipe base 101 can be made of any suitable metal material, such as plain carbon steel, without regard to corrosion resistance, thereby helping to reduce material costs.
  • the high-strength anti-corrosion coating 102 itself has high strength and density, and is easy to overcome the microscopic defects unique to the metal material, such as blisters, cracks, etc., so that the wall thickness can be made thin. Therefore, it helps to improve the deformation performance of the pipe fitting, thereby improving the quality of the compression seal. And help to reduce the weight of the product.
  • one end of the snap ring type pipe fitting 1 has a socket for inserting a desired metal pipe.
  • the socket of the snap ring type pipe member 1 shown in Fig. 2 is provided with a seal groove 2 and a snap ring groove 3 in this order from the inside to the outside.
  • this arrangement sequence helps to prevent corrosion of the connected galvanized steel pipe (which will be described later).
  • 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 metal snap ring.
  • the snap ring type pipe fitting 1 shown in the drawing is integrally formed.
  • Figure 3 is a half cross-sectional view showing the metal pipe connection structure of the present invention with a high strength anticorrosive coating.
  • the seal ring 4, the guide ring 5, the metal snap ring 6 and the anti-seepage ring 8 have been installed 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 ring 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.
  • Figure 4 is a cross-sectional view showing a metal pipe connection structure with a high strength anticorrosive coating of the present invention.
  • Fig. 5 is an enlarged view showing a portion A of the metal pipe connecting structure of Fig. 4 with a high-strength anticorrosive coating.
  • the sealing ring 4, the guide ring 5, the metal snap ring 6 and the anti-seepage ring 8 have been 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 is not necessary.
  • the guide ring 5 has a metal tube 7 that helps guide the insertion to avoid damage or movement of 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 plastic material as long as it meets 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 barrier ring 8 is also not required.
  • the seepage ring 8 is annular, and is disposed at the axially outermost side in the socket of the snap ring type pipe member 1, thereby preventing external moisture from infiltrating into the snap ring type pipe member 1 to cause corrosion.
  • the seepage prevention ring 8 realizes a seal between the snap ring type pipe member 1 and the metal pipe 7 from the axially outer side.
  • 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 metal 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, in order to meet the sealing requirements.
  • 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 metal snap ring 6 has an annular shape with a notch to reduce the inner diameter when subjected to radial compression.
  • the metal 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 peripheral surface of the metal snap ring 6 has a tapered surface.
  • this is only an exemplary cross section, and it is also possible to adopt a rectangular cross section as shown in FIGS. 4 and 5.
  • the engagement of the tapered structure with the deformed metal tube provides axial pressure to further compress the rubber seal, thereby providing a better sealing effect.
  • Fig. 7 shows a ring-type snap ring 6 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.
  • the metal pipe joint structure with high strength anticorrosive coating 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 metal snap ring 6 and the anti-seepage ring 8 have been mounted as shown in Fig. 3, and then the card is pressed using the pressing tool. The seal groove 2 and the snap ring groove 3 on the ring-shaped pipe member 1 are simultaneously compressed to a predetermined size.
  • 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 metal 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 When 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 connection structure with the high-strength anti-corrosion coating is only compressed and deformed in the sealing groove 2 and the snap ring groove 3 (in the same area) on the snap ring type pipe member 1, and the other portions are not Will be deformed.
  • 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)
  • Flanged Joints, Insulating Joints, And Other Joints (AREA)

Abstract

L'invention concerne une structure de raccordement de tuyau métallique pourvue d'un revêtement anticorrosion de haute résistance, comprenant : un raccord de tuyau de type circlips (1), une gorge d'étanchéité (2) et une gorge de circlips (3) étant disposées sur une surface circonférentielle interne d'une extrémité de douille de celle-ci; une bague d'étanchéité (4), disposée dans la gorge d'étanchéité (2); et un circlips métallique (6), qui présente une forme annulaire entaillée, est disposé dans la gorge correspondante (3) et facilite la déformation, le raccord de tuyau de type circlips (1) étant formé par un corps de base de raccord de tuyau métallique (101) et un revêtement anticorrosion de haute résistance (102) qui recouvre la paroi interne du corps de base de raccord de tuyau. Lorsqu'un tuyau métallique (7) est inséré dans une douille du raccord de tuyau de type circlips (3), la gorge d'étanchéité (2) et la gorge de circlips (3) du raccord de tuyau de type circlips (1) sont comprimées à l'aide d'un outil de sertissage de sorte que la gorge d'étanchéité (2) et la gorge de circlips (3) se déforment, ce qui permet de réaliser un raccordement étanche entre le raccord de tuyau métallique de type circlips (1) et le tuyau métallique. Comme la paroi interne du corps de base de raccord de tuyau comporte un revêtement anticorrosion de haute résistance, le raccord de tuyau de raccordement dans la structure de raccordement peut avoir une épaisseur de paroi mince, et le raccord de tuyau présente une haute résistance ainsi qu'une meilleure résistance à la corrosion. Ainsi, des matériaux métalliques ordinaires peuvent être utilisés pour obtenir de bonnes propriétés de déformation par sertissage, ce qui permet d'améliorer les performances d'étanchéité et de réduire le coût des matériaux.
PCT/CN2018/111857 2017-10-26 2018-10-25 Structure de raccordement de tuyau métallique à revêtement anticorrosion de haute résistance Ceased WO2019080896A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201711012059.2A CN109707935A (zh) 2017-10-26 2017-10-26 带有高强度防腐涂层的金属管道连接结构
CN201711012059.2 2017-10-26

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Publication Number Publication Date
WO2019080896A1 true WO2019080896A1 (fr) 2019-05-02

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117553186A (zh) * 2022-08-04 2024-02-13 中油国家油气钻井装备工程技术研究中心有限公司 双密封高压活动弯头

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CN112178309A (zh) * 2020-10-20 2021-01-05 国琳(天津)科技有限公司 厚壁卡压式管件
CN112113046A (zh) * 2020-10-24 2020-12-22 浙江班尼戈中捷管业有限公司 一种卡压式涂覆管道连接件防损保护装置
CN113898796A (zh) * 2021-11-10 2022-01-07 北京中捷北方管道设备有限公司 一种厚壁卡压式管件压接自防腐装置

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CN207599202U (zh) * 2017-10-26 2018-07-10 周庆念 带有高强度防腐涂层的金属管道连接结构

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AU2007201605A1 (en) * 2006-04-12 2007-11-01 Orrcon Operations Pty Ltd Pipe and pipe joining method
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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
CN207599202U (zh) * 2017-10-26 2018-07-10 周庆念 带有高强度防腐涂层的金属管道连接结构

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117553186A (zh) * 2022-08-04 2024-02-13 中油国家油气钻井装备工程技术研究中心有限公司 双密封高压活动弯头

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