An axial compression pipe coupling assembly, pipe coupling and method of use

Abstract

The present application relates to the technical field of pipe connection, in particular to an axial extrusion pipe joint assembly, a pipe joint and a use method. The pipe joint assembly comprises an outer ring component and an inner ring component; the inner surface of the outer ring component is provided with a first clamping groove; the outer surface of the inner ring component is respectively provided with a first clamping boss and a second clamping boss in the direction away from the end face; the outer diameter of the second clamping boss is greater than that of the first clamping boss; when the first clamping groove and the first clamping boss are positionally matched, the outer ring component and the inner ring component can be limited from being separated; when the first clamping groove and the second clamping boss are positionally matched, the outer ring component and the inner ring component form a self-locking connection; the inner surface of the inner ring component is provided with a gear slot structure. The first clamping boss and the first clamping groove are matched to realize the pre-assembly of the inner ring component and the outer ring component; when further extruded, the first clamping groove and the second clamping boss are matched to be more easily formed into a stable tight self-locking connection after deformation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe connection, in particular to an axial extrusion pipe joint assembly, a pipe joint and a use method. BACKGROUND

[0002] During the whole life cycle of an aircraft, the maintenance and repair of the hydraulic pipes of the aircraft is a very important work. The damage of the hydraulic pipes has various forms, such as rupture, corrosion, indentation, pit, wear and the like. Due to the complex working environment of the hydraulic system, some small defects existing on the pipes gradually develop and eventually lead to the failure of the hydraulic system, affecting the performance of the aircraft and even causing catastrophic flight accidents. The pipe joint with high connection strength, good sealing performance and simple assembly is the core target of the connection and repair of the hydraulic pipes.

[0003] The axial extrusion joint comprises an inner ring and an outer ring. The outer ring is pushed along the inner ring in the axial direction by a special tool, and the outer ring extrudes the inner ring and the pipe. The tooth groove structure of the inner ring is embedded on the pipe to form a mechanical connection and a metal seal. In the current axial extrusion joint, the inner ring and the outer ring are separately arranged. In use, the inner ring is sleeved on the sleeve pipe, and then the outer ring is extruded and connected. The above-mentioned separate arrangement of the inner ring and the outer ring is prone to movement and sliding off along the pipe during assembly when the pipe arrangement is complex, causing inconvenience in operation. SUMMARY

[0004] The present application aims at the problem that the inner ring part is prone to sliding off during assembly of the axial extrusion structure in the prior art, causing inconvenience in operation. The present application provides an axial extrusion pipe joint assembly. The pipe joint assembly is pre-assembled by arranging a first clamping groove on the inner ring part and a first clamping groove on the outer ring part, so as to avoid separation of the inner ring and the outer ring during operation.

[0005] In order to achieve the above-mentioned purpose, the technical scheme adopted by the present application is as follows:

[0006] An axial extrusion pipe joint assembly comprises an outer ring part and an inner ring part.

[0007] The inner surface of the outer ring part is provided with a first clamping groove. The outer surface of the inner ring part is respectively provided with a first clamping groove and a second clamping groove in the direction away from the end face. The outer diameter of the second clamping groove is larger than that of the first clamping groove.

[0008] When the first clamping groove and the first clamping groove are positionally matched, the separation of the outer ring part and the inner ring part can be limited. When the first clamping groove and the second clamping groove are positionally matched, the outer ring part and the inner ring part form a self-locking connection.

[0009] The inner surface of the inner ring part is provided with a tooth groove structure. The tooth groove structure is used to form a connection and a seal with the pipe during the axial extrusion process.

[0010] The first clamping groove on the inner surface of the outer ring component and the first clamping post on the outer surface of the inner ring component are matched to realize pre-assembly of the inner ring component and the outer ring component, so that the parts are prevented from falling and the operation is more convenient; when further self-locking, the first clamping groove is in close contact with the second clamping post to avoid a gap between the outer ring component and the inner ring component, so that the self-locking is more easily formed after deformation and the stability of the connection is improved.

[0011] As a preferred scheme of the present application, the inner ring component has a first end face, and the outer surface of the inner ring component is sequentially provided with a first taper, a second taper, a second cylindrical surface, the second clamping post, a third cylindrical surface and a flange along a direction away from the first end face; the first taper gradually increases in diameter along a direction away from the first end face, and the second taper gradually increases in diameter along a direction away from the first end face; the minimum diameter of the second taper is smaller than the maximum diameter of the first taper; the first taper and the second taper are smoothly connected to form the first clamping post; the side surface of the flange close to the first end face serves as a termination surface of axial extrusion; and the side surface of the flange away from the first end face serves as a first extrusion surface of axial extrusion.

[0012] As a preferred scheme of the present application, the first end face and the first taper are connected through a first cylindrical surface.

[0013] As a preferred scheme of the present application, the outer ring component has a second end face, and the inner surface of the outer ring component is sequentially provided with a fourth taper and a third taper along a direction away from the second end face; the fourth taper gradually decreases in diameter along a direction away from the second end face, and the third taper gradually decreases in diameter along a direction away from the second end face; the maximum diameter of the third taper is greater than the minimum diameter of the fourth taper; the fourth taper and the third taper are smoothly connected to form the first clamping groove; and the side surface of the outer ring component away from the second end face serves as a second extrusion surface of axial extrusion.

[0014] As a preferred scheme of the present application, the second extrusion surface and the third taper are connected through a fourth cylindrical surface.

[0015] As a preferred scheme of the present application, the third taper and the first taper are adapted, and the fourth taper and the second taper are adapted. After the outer ring component and the inner ring component are self-locked, the first taper and the third taper are in closer contact after deformation, and the second taper and the fourth taper are in closer contact after deformation.

[0016] As a preferred scheme of the present application, the tooth groove structure comprises a plurality of grooves sequentially and spacedly arranged, and a convex tooth is formed between adjacent grooves.

[0017] As a preferred scheme of the present application, the tooth groove structure is located between the first clamping post and the second clamping post.

[0018] A pipe joint comprising a joint body and a compression ring, the pipe joint comprising an axial compression pipe joint assembly as described above;

[0019] The joint body comprises 1-3 connecting ends, at least one of which is formed by the inner ring component; the compression ring is formed by the outer ring component.

[0020] As a preferred scheme of the present application, the pipe joint is a straight-through pipe joint.

[0021] As a preferred scheme of the present application, the pipe joint is a tee pipe joint.

[0022] The method for using the pipe joint as described above comprises the following steps: first, axially compressing the inner ring component and the outer ring component to form a pre-assembly in which the first clamping groove exceeds the first clamping post; then, inserting a pipe to be connected into the inner ring component and continuing to axially compress until the outer ring component, the inner ring component and the pipe are plastically deformed to form a self-locking.

[0023] As described above, due to the adoption of the technical scheme, the present application has the following beneficial effects:

[0024] 1. The axial compression pipe joint assembly of the present application realizes the pre-assembly of the inner ring component and the outer ring component through the cooperation of the first clamping post on the outer surface of the inner ring component and the first clamping groove on the inner surface of the outer ring component, avoids the falling of parts and is more convenient to operate; when further self-locked, the first clamping groove and the second clamping post are more likely to form a close contact after deformation, which is beneficial to improving the stability of the connection.

[0025] 2. The axial compression pipe joint assembly of the present application is provided with a corresponding matching of the conical surface and the cylindrical surface, and the cooperation of the first clamping groove and the second clamping post, so that after the self-locking of the outer ring component and the inner ring component, the first conical surface and the third conical surface, the second conical surface and the fourth conical surface, and the first clamping groove and the second clamping post are in close contact, which is beneficial to improving the connection stability.

[0026] 3. The pipe joint of the present application is easy to realize pre-assembly, avoids the falling of parts and is more convenient to operate by using the above-mentioned axial compression pipe joint assembly. The axial compression joint is provided with a special compression tool, and the entire compression assembly process only needs to use the tool to push the outer ring along the axial direction to reach the inner ring flange.

[0027] 4, The pipe joint of the present application, in use, the outer ring component is caused to plastically and elastically deform to different degrees between the outer ring component, the inner ring component and the pipe by the radial pressure generated by the axial extrusion, and the three are tightly connected by the deformation to achieve the sealing effect. The connection of the pipe joint and the pipe by the axial extrusion not only relies on the mechanical interference generated by the axial extrusion and the embedded pipe material by the annular tooth groove structure, but also has the self-locking formed by the elastic deformation of the annular clamping shaft into the annular clamping groove, further strengthening the connection reliability and connection strength. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 is a structural schematic diagram of the inner ring component of the pipe joint of the present application.

[0029] Figure 2 is a structural schematic diagram of the outer ring component of the pipe joint of the present application.

[0030] Figure 3 is a cross-sectional structural schematic diagram of one of the inner ring components in the joint body of the present application.

[0031] Figure 4 is a cross-sectional structural schematic diagram of the extrusion ring of the present application.

[0032] Figure 5 is a structural schematic diagram of the pipe joint after pre-assembly in Example 1.

[0033] Figure 6 is Figure 5 is an enlarged view schematic diagram of the ellipse A in

[0034] Figure 7 is Figure 6 is a schematic diagram of the inner ring component part in

[0035] Figure 8 is Figure 6 is a schematic diagram of the outer ring component part in

[0036] Figure 9 is Figure 5 is a full cross-sectional structural schematic diagram of

[0037] Figure 10 is a cross-sectional structural schematic diagram of the pipe pre-assembly and the final assembly state in Example 1.

[0038] Figure 11 is a cross-sectional structural schematic diagram of the pipe joint in Example 2.

[0039] Icon: 1-inner ring component; 11-first end face; 12-first extrusion surface; 13-termination surface; 2-outer ring component; 21-second end face; 22-second extrusion surface; 101-first cylindrical surface; 102-second cylindrical surface; 103-third cylindrical surface; 104-fourth cylindrical surface; 201-first tapered surface; 202-second tapered surface; 203-third tapered surface; 204-fourth tapered surface; 301-first clamping post; 302-second clamping post; 401-first clamping groove; 501-first recess; 502-second recess; 503-third recess; 601-first protruding tooth; 602-second protruding tooth; 701-flange. DETAILED DESCRIPTION

[0040] The application will be described in further detail below with reference to the drawings.

[0041] In order to make the purpose, technical solutions and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present application and do not limit the present application.

[0042] Example 1

[0043] An axial extrusion pipe joint assembly, as shown in Figure 1 , Figure 2 , comprises an outer ring component 2 and an inner ring component 1.

[0044] As shown in Figure 4 , the inner surface of the outer ring component 2 is provided with a first clamping groove 401; as shown in Figure 3 , the outer surface of the inner ring component 1 is respectively provided with a first clamping post 301 and a second clamping post 302 in the direction away from the end face; the outer diameter of the second clamping post 302 is greater than that of the first clamping post 301; when the first clamping groove 401 and the first clamping post 301 are positionally adapted, the outer ring component 2 and the inner ring component 1 can be restricted from being separated; when the first clamping groove 401 and the second clamping post 302 are positionally adapted, the outer ring component 2 and the inner ring component 1 form a self-locking connection; the inner surface of the inner ring component 1 is provided with a tooth groove structure, which is used to form a connection and sealing with the catheter 3 during the axial extrusion process.

[0045] More specific structure, as shown in Figure 3As shown, the inner ring component 1 has a first end face 11, and the outer surface of the inner ring component 1 is sequentially provided with a first cylindrical surface 101, a first tapered surface 201, a second tapered surface 202, a second cylindrical surface 102, the second clamping post 302, a third cylindrical surface 103 and a flange 701 away from the first end face 11; the first end face 11 and the first tapered surface 201 are connected by the first cylindrical surface 101. The first tapered surface 201 gradually increases in diameter away from the first end face 11, and the second tapered surface 202 gradually increases in diameter away from the first end face; the minimum diameter of the second tapered surface 202 is smaller than the maximum diameter of the first tapered surface 201; the minimum diameter of the second tapered surface 202 is greater than the minimum diameter of the first tapered surface 201; the connection between the first tapered surface 201 and the second tapered surface 202 is smoothly transitioned to form the first clamping post 301; the side of the flange 701 close to the first end face 11 serves as the termination surface 13 of axial extrusion; the side of the flange 701 away from the first end face 11 is the first extrusion surface 12 of axial extrusion. The third cylindrical surface 103 and the side of the flange 701 are smoothly transitioned.

[0046] As shown, Figure 4 the outer ring component 2 has a second end face 21, and the inner surface of the outer ring component 2 is sequentially provided with a fourth tapered surface 204 and a third tapered surface 203 away from the second end face 21;

[0047] The fourth tapered surface 204 gradually decreases in diameter away from the second end face 21, and the third tapered surface 203 gradually decreases in diameter away from the second end face 21; the maximum diameter of the third tapered surface 203 is greater than the minimum diameter of the fourth tapered surface 204; the maximum diameter of the third tapered surface 203 is smaller than the maximum diameter of the fourth tapered surface 204; the connection between the fourth tapered surface 204 and the third tapered surface 203 is smoothly transitioned to form the first clamping groove 401; the fourth tapered surface 204 and the second end face 21 are smoothly transitioned. The side of the outer ring component 2 away from the second end face 21 is the second extrusion surface 22 of axial extrusion. The second extrusion surface 22 and the third tapered surface 203 are connected by the fourth cylindrical surface 104.

[0048] Returning to Figure 3 , the tooth groove structure includes a plurality of grooves sequentially and spacedly arranged, and a convex tooth is formed between adjacent grooves. The present embodiment includes a first groove 501, a second groove 502 and a third groove 503, and a first convex tooth 601 is formed between the first groove 501 and the second groove 502; a second convex tooth 602 is formed between the second groove 502 and the third groove 503; the first convex tooth 601 and the second convex tooth 602 each have a certain width.

[0049] The tooth groove structure is located between the first clamping post 301 and the second clamping post 302. More specifically, the width of the first groove 501 and the second groove 502 is less than the width of the third groove 503. The first groove 501 is located at the position corresponding to the second conical surface 202, the second groove 502 is located at the position where the second conical surface 202 and the second cylindrical surface 102 transition, and the third groove 503 is located at the position corresponding to the second cylindrical surface 102. The third groove 503 gradually decreases in diameter in the direction away from the first end surface 11.

[0050] The axial pipe joint assembly is applied to a pipe joint, which comprises a joint body and an extrusion ring. The joint body comprises 1-3 connecting ends, at least one of which is formed by the inner ring part; and the extrusion ring is formed by the outer ring part. The pipe joint in the embodiment is a straight-through pipe joint. Figure 5

[0051] The joint body is integrally formed and symmetrically arranged, and both ends are the inner ring part 1, which is used in cooperation with the two outer ring parts 2.

[0052] In order to facilitate use and prevent loss of parts, the joint is first pre-assembled with the joint body and the extrusion ring before being provided to the user for use. The pre-assembly process is as follows: the outer ring parts 2 of the two extrusion rings are separately sleeved into the inner ring part 1 from both ends of the inner ring part in the axial direction, a special axial extrusion joint pre-assembly tool is applied, and the first extrusion surface 11 and the second extrusion surface 21 are extruded at the same time; the outer ring part 2 is pressed into the inner ring part 1 in the axial direction until the annular first clamping groove 401 of the outer ring part passes over the annular first clamping post 301 of the inner ring part, and the annular first clamping post 301 is clamped into the annular first clamping groove 401 through elastic deformation, as shown in Figure 6

[0053] The third conical surface and the first conical surface are adapted, and the fourth conical surface and the second conical surface are adapted. Figure 7 Figure 8 Figure 6 ​​​​The components after magnification. The position and proportion of each surface are more clearly presented. The length of the third conical surface 203 is substantially the same as the length of the first conical surface 201. The length of the fourth conical surface 204 is substantially the same as the length of the second conical surface 202. The length of the third conical surface 203 is greater than the length of the fourth conical surface 204, and the corresponding conical angle of the third conical surface 203 is greater than the corresponding conical angle of the fourth conical surface. The length of the first conical surface 201 is greater than the length of the second conical surface 202, and the corresponding conical angle of the first conical surface 201 is greater than the corresponding conical angle of the second conical surface 202. The diameter of the second cylindrical surface 102 is substantially the same as the maximum diameter of the first conical surface 201. The diameter of the third cylindrical surface 103 is substantially the same as the diameter of the second cylindrical surface 102. When the second end surface 21 is in contact with the termination surface 13, the first clamping groove 401 is located on the side of the second clamping post 302 close to the termination surface 13, the fourth conical surface 204 is in close contact with the third cylindrical surface 103 after deformation, and the third conical surface 203 is in close contact with the second cylindrical surface 102 after deformation.

[0054] The cross-sectional view of the pre-assembled pipe joint is shown in Figure 9 The two pipes 3 are inserted into the pipe joint from both ends to a certain depth, and there is a gap between the two pipes. The axial extrusion is performed again by the tool until the end surface 21 of the outer ring component 2 is in contact with the termination surface 13 of the flange 701 of the inner ring component 1. Then the extrusion tool is removed, and the elastic-plastic deformation of the outer ring component, the inner ring component, and the pipe during the extrusion process forms a radial clamping. The tooth groove structure on the inner surface of the inner ring component 1 is embedded into the pipe, and the annular second clamping post 302 on the outer surface of the inner ring component 1 is clamped into the annular first clamping groove 401 on the inner surface of the outer ring component 2 by elastic deformation, forming a self-locking. As shown in Figure 10 Figure 10 In the figure, the left side is a structural schematic diagram of the pipe 3 and the pre-assembled pipe joint. The right side is a schematic diagram of the connection relationship after the axial extrusion and self-locking deformation.

[0055] In another embodiment of the straight-through pipe joint, one end of the joint body adopts the axial pipe joint assembly described above, and the other end can adopt other detachable connection methods suitable for the connection of aviation pipes. Thus, a detachable straight-through pipe joint is formed.

[0056] Example 2

[0057] This example is based on Example 1, and the axial pipe joint assembly in Example 1 is applied to a tee pipe joint, i.e., the pipe joint is a tee pipe joint. As shown in Figure 11 The three connection ends of the tee joint body all adopt the inner ring component in Example 1, which is used in cooperation with the three outer ring components 2. In other embodiments, one or two of the connection ends can be connected by other methods suitable for the connection of aviation pipes.

[0058] ​The above merely describes preferred embodiments of the present application, and is not used to limit the present application, any modification, equivalent replacement and improvement within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. An axial compression pipe coupling assembly, characterized by, The outer ring component (2) and the inner ring component (1) are provided; The inner surface of the outer ring component (2) is provided with a first clamping groove (401); The outer surface of the inner ring component (1) is provided with a first clamping groove (401) and a second clamping groove (302) in the direction away from the end face respectively; the outer diameter of the second clamping groove (302) is greater than that of the first clamping groove (301); When the first clamping groove (401) and the first clamping groove (301) are matched in position, the outer ring component (2) and the inner ring component (1) can be separated; when the first clamping groove (401) and the second clamping groove (302) are matched in position, the outer ring component (2) and the inner ring component (1) form a self-locking connection; The inner surface of the inner ring component (1) is provided with a tooth groove structure, which is used to form a connection and sealing with the catheter during axial extrusion; The inner ring component (1) has a first end face (11), and the outer surface of the inner ring component (1) is sequentially provided with a first taper surface (201), a second taper surface (202), a second cylindrical surface (102), the second clamping groove (302), a third cylindrical surface (103) and a flange (701) in the direction away from the first end face (11); The diameter of the first taper surface (201) gradually increases in the direction away from the first end face (11), and the diameter of the second taper surface (202) gradually increases in the direction away from the first end face (11); the minimum diameter of the second taper surface (202) is smaller than the maximum diameter of the first taper surface (201); the first taper surface (201) and the second taper surface (202) are smoothly connected to form the first clamping groove (301); The side of the flange (701) close to the first end face (11) serves as an axial extrusion termination surface (13), and the side of the flange (701) away from the first end face (11) serves as an axial extrusion first extrusion surface (12); The outer ring component (2) has a second end face (21), and the inner surface of the outer ring component (2) is sequentially provided with a fourth taper surface (204) and a third taper surface (203) in the direction away from the second end face (21); The diameter of the fourth taper surface (204) gradually decreases in the direction away from the second end face (21), and the diameter of the third taper surface (203) gradually decreases in the direction away from the second end face (21); the maximum diameter of the third taper surface (203) is greater than the minimum diameter of the fourth taper surface (204); the fourth taper surface (204) and the third taper surface (203) are smoothly connected to form the first clamping groove (401); The side of the outer ring component (2) away from the second end face (21) serves as an axial extrusion second extrusion surface (22); The third taper surface (203) and the first taper surface (201) are matched, and the fourth taper surface (204) and the second taper surface (202) are matched. The third taper surface (203) and the first taper surface (201) have the same length, the fourth taper surface (204) and the second taper surface (202) have the same length, the length of the third taper surface (203) is greater than that of the fourth taper surface (204), and the corresponding conical angle of the third taper surface (203) is greater than that of the fourth taper surface (204); the length of the first taper surface (201) is greater than that of the second taper surface (202), and the corresponding conical angle of the first taper surface (201) is greater than that of the second taper surface (202); the diameter of the second cylindrical surface (102) is the same as the maximum diameter of the first taper surface (201), and the diameter of the third cylindrical surface (103) is the same as that of the second cylindrical surface (102); The first end surface (11) and the first taper surface (201) are connected by a first cylindrical surface (101); The second extrusion surface (22) and the third taper surface (203) are connected by a fourth cylindrical surface (104); When the second end surface (21) is in contact with the termination surface (13), the first clamping groove (401) is located on the side of the second clamping post (302) close to the termination surface (13), the fourth taper surface (204) and the third cylindrical surface (103) form a close contact after deformation, and the third taper surface (203) and the second cylindrical surface (102) form a close contact after deformation.

2. The axial compression pipe coupling assembly of claim 1, wherein, The tooth groove structure comprises a plurality of grooves arranged in sequence and spaced, and a protruding tooth is formed between adjacent grooves; the tooth groove structure is located between the first clamping post (301) and the second clamping post (302).

3. A pipe joint comprising a joint body and an extruded ring, characterised in that, The axial extrusion pipe joint assembly comprises the axial extrusion pipe joint assembly according to any one of claims 1-2; The joint body comprises 1-3 connecting ends, at least one of which is formed by the inner ring component (1); the extrusion ring is formed by the outer ring component (2).

4. The pipe joint of claim 3, wherein, The pipe joint is a straight-through pipe joint or a three-way pipe joint.

5. A method of using a pipe joint according to claim 3 or 4, characterized in that The inner ring component and the outer ring component are axially extruded to form a pre-assembly in which the first clamping groove exceeds the first clamping post; then the to-be-connected conduit is inserted into the inner ring component, and the axial extrusion is continued until the outer ring component, the inner ring component and the conduit are elastically and plastically deformed to form a self-locking.

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