Annular pressure connecting structure for pipes

Abstract

The utility model discloses an annular pressure connection structure for pipes, which comprises a metal pipe fitting and a support ring, the support ring is provided with an abutting part and a support part, a slope part is formed at the intersection of the abutting part and the support part of the support ring, and a circle of glue storage diversion trench is formed in the position, adjacent to the slope part, of the support part in a sinking manner. The sunken glue storage flow guide groove is formed in the supporting part of the supporting ring, so that glue in the cavity can be smoothly extruded into a gap between the abutting part and the inner wall of the metal pipe fitting and a gap between the outer wall of the pipe and the inner wall of the metal pipe fitting when the metal pipe fitting is deformed and extruded by ring pressing, and can also be smoothly extruded into a gap between the supporting part and the inner wall of the pipe; the comprehensive filling sealing performance is realized; in addition, a limiting groove is formed in the pipe in a sinking mode, a protruding part in the limiting groove abuts against a supporting part port of the supporting ring, the problem that excessive glue permeates into the inner wall of the pipeline in a gap is solved, meanwhile, a glue layer with a certain size can be formed so that a better sealing effect can be achieved, and meanwhile the end of the pipe fitting can be buckled into the limiting groove in the outer wall of the pipe due to annular pressing deformation. And the tensile force of connection is increased. The structure is ingenious in conception and excellent in practicability, and the long-standing pain points in the industry are solved.

Description

Technical Field

[0001] This utility model relates to pipe butt connection technology, mainly for the port butt connection technology of metal pipes or steel-plastic composite pipes that can deform under external pressure, specifically for the structure of ring pressure connection for such pipes. Background Technology

[0002] For the port connections of metal pipes (such as stainless steel pipes) or steel-plastic composite pipes, in order to ensure the pull-out resistance and sealing performance of the connection, as well as the ease and convenience of on-site construction, there are already a large number of publicly available connection solutions. The current mainstream connection solution is to use the ring compression / press-fit socket connection method. The connection principle is to form a connector with an annular cavity by using a support ring and a metal pipe fitting. The pipe inserted into the connector is sealed with anaerobic adhesive. Then, a hydraulic ring compression tool is used to apply pressure to the metal pipe fitting to cause it to shrink in diameter and deform, thereby achieving a strong pull-out resistant connection.

[0003] However, current ring-press / press-fit socket connections generally have the problem of uniform coverage of the adhesive seal. If adhesive is applied, it depends on the responsibility of the construction workers and their professional coating skills, and it is difficult to cover the entire surface. If glue is poured in, there is a risk that too much glue will seep into the inner wall of the pipe in some gaps, which may lead to the risk of contamination of the transported water / liquid. In addition, there may be no glue in some gaps, resulting in sealing defects. Utility Model Content

[0004] To address the aforementioned issues, this invention aims to provide a ring-pressure connection structure that ensures the adhesive fully fills the connection gap, thereby achieving better sealing performance.

[0005] To achieve this technical objective, the present invention provides a ring-press connection structure for pipes, comprising a metal fitting and a support ring. The pipe is made of metal or a steel-plastic composite material. The inner diameter of the metal fitting matches the outer diameter of the pipe. The support ring has an abutment portion and a support portion. The outer diameter of the abutment portion is the same as the outer diameter of the pipe and matches the inner diameter of the metal fitting. The outer diameter of the support portion matches the inner diameter of the pipe. A slope is formed at the intersection of the abutment portion and the support portion of the support ring. A ring of glue storage and diversion groove is formed at the position of the support portion adjacent to the slope portion.

[0006] Preferably, the end of the pipe is recessed and has a limiting groove. The length of the limiting groove from the pipe port matches the length of the support ring. When the support ring is inserted into the pipe port, the support ring port stops at the protrusion in the limiting groove of the pipe, and the end of the pipe is positioned above the glue storage and guiding groove on the support ring.

[0007] Preferably, the metal fitting has a limiting step ring in its sinking structure. After the support ring is inserted into the pipe end and then the fitting is inserted together, the abutting part of the support ring stops the limiting step ring of the fitting, and the supporting part of the support ring stops the protrusion in the pipe limiting groove. The end of the fitting is positioned above the pipe limiting groove. The length of the limiting step ring from the metal fitting end is greater than the length of the support ring.

[0008] Preferably, the adhesive used is a high-viscosity anaerobic adhesive.

[0009] The beneficial effects of this utility model are as follows: By constructing a sunken glue storage and guiding groove at the support part of the support ring, the glue in the cavity can be smoothly squeezed into the gaps between the abutment part and the inner wall of the metal pipe, the gaps between the outer wall of the pipe and the inner wall of the metal pipe, and the gap between the support part and the inner wall of the pipe when the metal pipe is squeezed by the ring compression deformation, achieving comprehensive filling and sealing performance. In addition, the limiting step ring stops the abutment part port of the support ring, and the protrusion in the pipe limiting groove stops the support part port of the support ring, which helps to prevent excessive glue from seeping into the inner wall of the pipe through the gaps. The pipe end is pressed into the limiting groove of the pipe by the ring compression deformation, and at the same time, the pipe end is pressed into the glue storage and guiding groove on the support ring and the pressure groove formed by the ring compression deformation on the pipe, which together greatly increases the pull-out force of the connection between the pipe and the pipe. This structure is ingeniously designed, has excellent practicality, and solves a long-standing pain point in the industry. Attached Figure Description

[0010] Figure 1 This is an axial cross-sectional view of the preferred embodiment of the present invention before ring compression connection;

[0011] Figure 2 for Figure 1 Enlarged view of the circled area;

[0012] Figure 3 This is an axial cross-sectional view of the preferred embodiment of the present invention after ring compression connection;

[0013] Figure 4 for Figure 3 A magnified view of the circled area.

[0014] Wherein: 10 is pipe, 11 is limiting groove, 21 is support part, 22 is abutment part, 23 is glue storage and guide groove, 24 is slope part, 30 is metal pipe fitting, 31 is limiting step ring, and 40 is glue. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the following detailed description, only certain exemplary preferred embodiments of the present invention are described by way of illustration. Undoubtedly, those skilled in the art will recognize that various modifications can be made to the described embodiments without departing from the spirit and scope of the present invention. Therefore, the drawings and description are illustrative in nature and not intended to limit the scope of the claims.

[0016] The pipes involved in this utility model are mainly metal pipes (such as stainless steel pipes) or steel-plastic composite pipes. The connection of these pipes is commonly achieved by ring compression connection. The connection principle is to form a connector with an annular cavity by a support ring and a metal pipe fitting. Anaerobic adhesive is used to seal the pipe inserted into the connector. Then, a hydraulic ring compression tool is used to apply pressure to the metal pipe fitting to cause it to shrink in diameter and deform, thereby achieving a strong pull-out resistant connection.

[0017] like Figure 1-4 As shown, this utility model discloses a ring-compression connection structure for pipes, comprising a metal fitting 30 and a support ring. The pipe 10 is made of metal or steel-plastic composite material. The inner diameter of the metal fitting 30 matches the outer diameter of the pipe. The support ring has an abutment portion 22 and a support portion 21. The outer diameter of the abutment portion 22 is the same as the outer diameter of the pipe and matches the inner diameter of the metal fitting 30. The abutment portion 22 is used to cooperate with the metal fitting 30 to form a stable seal and pull-out resistant connection. The outer diameter of the support portion 21 matches the inner diameter of the pipe 10. The support portion 21 provides internal support to the pipe 10, ensuring deformation engagement between the metal fitting 30 and the pipe 10 during ring compression. A slope portion 24 is formed at the intersection of the abutment portion 22 and the support portion 21 of the support ring. A ring of glue storage and guiding groove 23 is recessed at the position adjacent to the slope portion 24 of the support portion 21. By constructing a sunken glue storage and diversion channel 23 in the support portion 21 of the support ring, the glue in the glue storage cavity formed by the support portion 21 can be smoothly squeezed into the gap between the abutment portion 22 and the inner wall of the metal pipe 30, the gap between the outer wall of the pipe 10 and the inner wall of the metal pipe 30, and the gap between the support portion 21 and the inner wall of the pipe 10 when the metal pipe 30 is squeezed by the ring compression deformation (the ring compression deformation part is selected at the position of the metal pipe corresponding to the slope part), thus achieving comprehensive filling and sealing performance, as shown in the attached figure. Figure 3 , 4 As shown. If the glue storage and diversion channel 23 is not designed, it will be more difficult for the glue to enter evenly into the gap between the support 21 and the inner wall of the tube 10.

[0018] To ensure that the ramp portion 24 and the glue storage channel 23 are not completely squeezed by the end of the pipe, thus preserving the glue storage cavity and preventing excessive glue seepage into the inner wall of the pipe through certain gaps, this solution preferably includes a recessed limiting groove 11 at the end of the pipe 10 inserted into the metal fitting 30. The length of the limiting groove 11 from the end of the pipe 10 matches the length of the support ring 21. Its function is to restrict further insertion of the pipe 10 when the protrusion within the limiting groove 11 is blocked by the support ring end. This ensures that the end of the pipe moderately squeezes the glue storage cavity, preventing excessive glue compression, and does not completely obstruct the glue storage channel 23, ensuring smooth glue flow; it also forms a glue layer of a certain volume for better sealing.

[0019] To facilitate the insertion and positioning of the support ring, the metal fitting 30 is recessed and equipped with a limiting step ring 31. The length of the limiting step ring 31 from the end of the metal fitting is greater than the length of the support ring. After the support ring is inserted into the end of the pipe and then the fitting is inserted together, the abutting end of the support ring stops the limiting step ring of the fitting, and the supporting end of the support ring stops the protrusion in the limiting groove of the pipe. The end of the fitting is positioned above the limiting groove of the pipe.

[0020] The design of the bidirectional top-stop inner support ring of the recessed inner protrusion of the limiting step ring 31 and the pipe limiting groove 11 effectively limits the penetration of glue into the inner wall of the pipe.

[0021] In addition, the limiting groove 11 can also form a good engagement with the metal fitting 30, that is, the ring-pressed metal fitting 30 corresponds to the position of the limiting groove 11, so that its deformation is snapped into the limiting groove 11; at the same time, the pipe end is snapped into the glue storage and guiding groove on the support ring by the ring-pressed deformation of the fitting, and the pressure groove formed by the ring-pressed deformation on the fitting together greatly increases the pull-out force of the connection between the fitting and the pipe. Figure 3 As shown, better tensile strength is achieved.

[0022] Preferably, the adhesive used in this solution is a high-viscosity anaerobic adhesive. During construction, the viscous anaerobic adhesive is first squeezed and wrapped around the sloping part of the support ring, then the support ring is inserted into the metal pipe, and then the pipe is inserted into the annular gap formed by the support ring and the metal pipe. Finally, the metal pipe is pressed together using a ring pressing device (such as hydraulic pressing). The pressing positions must be the positions of the metal pipe corresponding to the sloping part and the positions corresponding to the limiting groove 11. Of course, in order to further enhance the pull-out resistance of the connection, the pipe can also be subjected to overall internal compression deformation.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A ring pressure connection structure for a pipe, comprising a metal pipe fitting and a support ring, the pipe being made of metal or steel-plastic composite material, the inner diameter of the metal pipe fitting matching the outer diameter of the pipe, the support ring having an abutting portion and a supporting portion, the outer diameter of the abutting portion being the same as the outer diameter of the pipe and matching the inner diameter of the metal pipe fitting, the outer diameter of the supporting portion matching the inner diameter of the pipe; characterized in that: The abutment part of the support ring and the support part form a slope part, and the support part is sunk to form a circle of glue storage flow guide grooves.

2. The ring pressure joining structure for pipe materials according to claim 1, characterized by The end of the pipe is sunk to form a circle of limiting grooves, the length of the limiting grooves from the pipe port matches the length of the support part of the support ring, when the support ring is inserted into the pipe port, the end port of the support ring stops at the protruding part in the limiting groove of the pipe, and the end of the pipe is above the glue storage flow guide grooves of the support ring.

3. The ring pressure connection structure for pipe according to claim 2, characterized by The metal pipe is sunk to form a circle of limiting step rings, after the pipe port is inserted into the support ring and then the pipe and the support ring are inserted into the pipe, the end port of the support ring stops at the limiting step ring of the pipe, the support part of the support ring stops at the protruding part in the limiting groove of the pipe, and the end of the pipe is above the limiting groove of the pipe; the length of the limiting step ring from the pipe port is greater than the length of the support ring.

4. The ring pressure connection structure for pipe materials according to any one of claims 1 to 3, characterized by, The used glue is anaerobic glue with high viscosity.

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