Pipe joint

Abstract

The utility model relates to the field of pipeline connection. The utility model aims to provide a pipe joint which comprises an outer sleeve and a clamping sleeve arranged in the outer sleeve, the outer sleeve and the clamping sleeve are both of a through type structure, the left end of the outer sleeve is used for being detachably connected with an outer joint to be connected, and the right end of the outer sleeve is used for allowing an outer connecting pipe to be connected to be inserted and extends into the clamping sleeve; the clamping sleeve comprises a sleeve body and a deformation clamping part arranged at the right end of the sleeve body, and the inner wall of the outer sleeve is provided with a guide surface for guiding the deformation clamping part to be folded inwards and clamping the external pipe; the outer connector is inserted into the clamping sleeve through the left end of the outer sleeve and pushes and extrudes the clamping sleeve, and the deformation clamping part is stressed to be folded inwards to clamp the outer connecting pipe. By means of the connector composed of the outer sleeve and the clamping sleeve, manual reaming operation is avoided, operation difficulty is lowered, meanwhile, material loss is reduced, and the effect that installation is easy and convenient is achieved.

Description

Technical Field

[0001] The utility model relates to the field of pipeline connection, in particular to a pipe joint. Background Art

[0002] At present, when installing the refrigerant connection copper pipe of the indoor and outdoor units of the air conditioner, the operator needs to use a manual pipe expander to expand the bell mouth of the copper pipe to be connected, and then connect it to the air conditioner angle valve through a brass pin. During the manual expansion process, the operator needs to cut the pipe flat and then perform manual trimming. During the operation, the pipe expander cannot clamp the pipe crookedly. Any of the above operating errors will cause the expansion mouth to crack and crooked and scrapped. Manual pipe expansion requires high installation skills of the operator and has low installation efficiency.

[0003] The use of an electric pipe expander based on the manual installation technology also has the above problems, and the operator needs to carry a whole set of tools, which brings great inconvenience to the air conditioning installation work. Utility Model Content

[0004] The utility model aims to provide a pipe joint to solve the problems in the above-mentioned background technology, namely, high requirements on the installation skills of operators, low installation efficiency and easy loss of materials.

[0005] The purpose of the utility model is achieved through the following technical solutions: a pipe joint, which includes an outer sleeve and a clamping sleeve arranged in the outer sleeve; the outer sleeve and the clamping sleeve are both left-right through-type structures, the left end of the outer sleeve is used for detachable connection with an external joint to be connected (such as an air conditioning angle valve), and the right end of the outer sleeve is used for inserting the external pipe to be connected, and the external pipe extends into the clamping sleeve;

[0006] The clamping sleeve comprises a sleeve body and a deformable clamping portion arranged at the right end of the sleeve body, and the inner wall of the outer sleeve is provided with a guide surface for guiding the deformable clamping portion to converge toward the central axis direction of the outer sleeve and clamp the external tube;

[0007] The external joint is inserted into the left end of the outer sleeve and pushed to squeeze the clamping sleeve, and the deformed clamping part is forced to close and clamp the external pipe toward the central axis direction of the outer sleeve.

[0008] The deformable clamping portion is an annular structure made of a flexible material, and its annular width is smaller than the thickness of the tube wall of the sleeve body.

[0009] The sleeve body and the deformation clamping portion are integrally formed.

[0010] The inner wall of the right end of the deformable clamping portion is provided with an annular convex edge extending toward the central axis direction thereof.

[0011] The guide surface is a conical surface that converges from left to right toward the central axis of the outer sleeve.

[0012] A matching surface that matches the guide surface is arranged on the periphery of the right end of the deformation clamping portion.

[0013] The left end of the clamping sleeve is recessed with a receiving cavity for matching the head of the external joint.

[0014] A first annular groove is formed on the inner wall of the left end of the outer sleeve, and a sealing ring A is embedded in the first annular groove.

[0015] A second annular groove is formed on the inner wall of the right end of the outer sleeve, and a sealing ring B is embedded in the second annular groove.

[0016] The clamping sleeve and the outer sleeve are clearance-matched.

[0017] The inner diameter of the right end of the outer sleeve matches the outer diameter of the external pipe.

[0018] The left end of the outer sleeve is connected to the external joint by threaded connection to achieve detachable connection; the end of the external joint is provided with an external thread, and the inner wall of the left end of the outer sleeve is provided with an internal thread that matches the external thread of the external joint.

[0019] Compared with the prior art, the advantages of the utility model are: a joint consisting of an outer sleeve and a clamping sleeve is used to connect the external joint (such as an air-conditioning angle valve) and the external pipe, without the need for the operator to manually expand the hole, the installation is simple and convenient, and does not rely on the operator's installation technology. While improving the installation efficiency, material loss is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of a pipe joint of the utility model;

[0021] Figure 2 This is a front view of a pipe joint of the utility model;

[0022] Figure 3 This is a front view of the clamping sleeve of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the clamping sleeve of the utility model;

[0024] Figure 5 The utility model is a use state diagram of a pipe joint inserted into an external pipe.

[0025] Explanation of reference numerals: 1 outer sleeve, 2 clamping sleeve, 21 sleeve body, 22 deformation clamping portion, 3 guide surface, 4 accommodating cavity, 5 annular convex edge, 6 first annular groove, 7 sealing ring A, 8 second annular groove, 9 sealing ring B, external pipe 10. DETAILED DESCRIPTION

[0026] The present invention is described in detail below with reference to the accompanying drawings and embodiments:

[0027] like Figures 1 to 4 Shown is a schematic diagram of an embodiment of a pipe joint provided by the utility model.

[0028] A pipe joint, comprising an outer sleeve 1 and a clamping sleeve 2 arranged in the outer sleeve 1, wherein the outer sleeve 1 and the clamping sleeve 2 are both left-right through-type structures, the left end of the outer sleeve 1 is used for detachable connection with an external joint to be connected, and the right end of the outer sleeve 1 is used for inserting an external pipe 10 to be connected, and the external pipe 10 extends into the clamping sleeve 2;

[0029] The entire pipe joint can be made of copper, aluminum, iron, plastic, stainless steel, etc. The corresponding external pipe 10 is the corresponding copper pipe, aluminum pipe, iron pipe, stainless steel pipe or plastic pipe to be connected, and the external joint is the corresponding copper, aluminum, iron, plastic or stainless steel joint.

[0030] When the pipe joint is made of copper, the external joint can be an air-conditioning angle valve, and the external pipe is a copper pipe. The pipe joint can be used to connect the air-conditioning angle valve and the copper pipe, solving the technical problems pointed out in the background technology.

[0031] Of course, the external connector may also be any other connector that needs to be connected to the external pipe except the air conditioning angle valve.

[0032] The clamping sleeve 2 comprises a sleeve body 21 and a deformable clamping portion 22 arranged at the right end of the sleeve body 21, and the inner wall of the outer sleeve 1 is provided with a guide surface 3 for guiding the deformable clamping portion 22 to converge toward the central axis direction of the outer sleeve 1 and clamp the external tube 10;

[0033] The left end of the outer sleeve is connected to the external joint by a threaded connection to achieve detachable connection; the end of the external joint (such as an air-conditioning angle valve) is provided with an external thread, and the inner wall of the left end of the outer sleeve 1 is provided with an internal thread that matches the external thread of the external joint.

[0034] The external joint is screwed into the left end of the outer sleeve 1 and pushed to squeeze and clamp the sleeve 2 , and the deformed clamping part 22 is forced to close and clamp the external pipe 10 toward the central axis direction of the outer sleeve 1 .

[0035] Furthermore, the outer periphery of the left end of the outer sleeve 1 is a hexagonal structure protruding outwardly to improve the installation efficiency of the operator.

[0036] The deformable clamping portion 22 is an annular structure made of flexible material, and its ring width is smaller than the wall thickness of the sleeve body 21, so that when the clamping sleeve 2 is pushed and squeezed by the external joint, the deformable clamping portion 22 cooperates with the guide surface 3 to deform and shrink toward the center.

[0037] The flexible material is copper material, aluminum material, plastic material, thin iron sheet, thin stainless steel sheet, etc.

[0038] The sleeve body 21 and the deformable clamping portion 22 are integrally formed and made of the same material, thereby ensuring the stability and reliability of the clamping sleeve 2 structure.

[0039] The inner wall of the right end of the deformable clamping portion 22 is provided with an annular convex edge 5 extending toward the central axis thereof.

[0040] Furthermore, the annular convex edges may be in a plurality of groups, so as to improve the clamping effect of the deformable clamping portion 22 on the external tube 10 .

[0041] The guide surface 3 is a conical surface that converges from left to right toward the central axis of the outer sleeve 1, so as to facilitate smooth convergence of the deformation clamping portion 22 when it is deformed, thereby further enhancing the clamping effect.

[0042] The right end periphery of the deformable clamping portion 22 is provided with a matching surface that fits with the guide surface 3 .

[0043] The left end of the clamping sleeve 2 is recessed with a receiving cavity 4 for matching the head of the external joint. The receiving cavity is used to increase the stability of the external joint inside the outer sleeve 1.

[0044] For example, when the external joint is an air-conditioning angle valve, the outer periphery of the end of the air-conditioning angle valve is not only provided with an external thread, but its end is also conical (that is, the air-conditioning angle valve is a conical external thread joint). At this time, the accommodating cavity 4 can accommodate the conical end of the air-conditioning angle valve.

[0045] Of course, the external connector can also be any connector with a conical surface and external threads except the air conditioning angle valve.

[0046] A first annular groove 6 is formed on the inner wall of the left end of the outer sleeve 1 , and a sealing ring A7 is embedded in the first annular groove. The sealing ring A7 is used to improve the sealing performance between the outer joint and the outer sleeve 1 .

[0047] A second annular groove 8 is formed on the inner wall of the right end of the outer sleeve 1 , and a sealing ring B9 is embedded in the second annular groove. The sealing ring B9 is used to improve the sealing performance between the external pipe 10 and the outer sleeve 1 .

[0048] The clamping sleeve 2 and the outer sleeve 1 are clearance-matched.

[0049] The inner diameter of the right end of the outer sleeve 1 matches the outer diameter of the external pipe 10 .

[0050] A specific application of this embodiment is a pipe joint, and its working principle is:

[0051] This embodiment includes an outer sleeve 1 and a clamping sleeve 2, both of which are through-type structures. The left end of the outer sleeve 1 is used to be connected with the external joint to be connected, which is convenient for the installation and removal of the joint. The right end of the outer sleeve 1 is used for the insertion of the external pipe 10, and the external pipe 10 further extends to the inside of the clamping sleeve 2 to achieve the connection between the external pipe 10 and the external joint;

[0052] The clamping sleeve 2 includes a sleeve body 21 and a deformable clamping portion 22. The deformable clamping portion 22 is arranged at the right end of the sleeve body 21, and is made of a flexible material, and has a certain elasticity and deformation capacity. The inner wall of the outer sleeve 1 is provided with a guide surface 3, which is a conical structure, and gradually converges from left to right toward the central axis direction of the outer sleeve 1;

[0053] When the outer joint is screwed in through the left end of the outer sleeve 1 and the extrusion clamping sleeve 2 is pushed, the deformable clamping portion 22 is guided by the guide surface 3 and will be retracted toward the central axis of the outer sleeve 1 and tightly clamp the outer tube 10. This makes the retraction process of the deformable clamping portion 22 smoother, thereby enhancing the clamping effect on the outer tube 10;

[0054] The ring width of the deformable clamping part 22 is smaller than the wall thickness of the sleeve body 21, so that the deformable clamping part 22 can be deformed more easily when squeezed, thereby firmly clamping the external tube 10. The sleeve body 21 and the deformable clamping part 22 are manufactured by an integrated molding process to ensure the stability and reliability of the structure of the clamping sleeve 2;

[0055] In order to further improve the sealing performance between the external joint and the external pipe 10, a first annular groove 6 is provided on the inner wall of the left end of the outer sleeve 1, and a sealing ring A7 is embedded therein, thereby improving the sealing performance between the external joint and the outer sleeve 1. A second annular groove 8 is provided on the inner wall of the right end of the outer sleeve 1, and a sealing ring B9 is embedded therein, thereby improving the sealing performance between the external pipe 10 and the outer sleeve 1;

[0056] The left end of the clamping sleeve 2 is provided with a receiving cavity 4, which is used to fit the head of the external joint, thereby increasing the stability of the external joint inside the outer sleeve 1;

[0057] The right end of the deformable clamping portion 22 is also designed with an annular convex edge 5 to increase the clamping force on the external pipe 10 and improve the stability of the connection. In addition, the annular convex edge 5 can be a plurality of groups to further enhance the clamping effect.

[0058] In summary, this embodiment achieves a stable connection between the external connector and the external tube 10, ensures the sealing performance of the connection, improves the traditional manual process of connecting the external connector to the external tube 10, avoids material waste, and is easy to install without relying on the operator's installation experience.

[0059] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A pipe joint, characterized in that: It comprises an outer sleeve (1) and a clamping sleeve (2) arranged in the outer sleeve (1); the outer sleeve (1) and the clamping sleeve (2) are both left-right through-type structures, the left end of the outer sleeve (1) is used for detachable connection with an external joint to be connected, and the right end of the outer sleeve (1) is used for inserting an external pipe (10) to be connected, and the external pipe (10) extends into the clamping sleeve (2); The clamping sleeve (2) comprises a sleeve body (21) and a deformable clamping portion (22) arranged at the right end of the sleeve body (21); the inner wall of the outer sleeve (1) is provided with a guide surface (3) for guiding the deformable clamping portion (22) to converge toward the central axis direction of the outer sleeve (1) and clamp the external tube (10); The external joint is inserted into the left end of the outer sleeve (1) and pushed to squeeze the clamping sleeve (2), and the deformable clamping part (22) is forced to close and clamp the external pipe (10) toward the central axis direction of the outer sleeve (1).

2. A pipe joint according to claim 1, characterized in that: The deformable clamping portion (22) is an annular structure made of a flexible material, and its annular width is smaller than the wall thickness of the sleeve body (21).

3. A pipe joint according to claim 2, characterized in that: The sleeve body (21) and the deformable clamping portion (22) are integrally formed.

4. A pipe joint according to claim 2, characterized in that: The inner wall of the right end of the deformable clamping portion (22) is provided with an annular convex edge (5) extending in the direction of the central axis thereof.

5. A pipe joint according to claim 1, characterized in that: The guide surface (3) is a conical surface that converges from left to right toward the central axis of the outer sleeve (1).

6. A pipe joint according to claim 5, characterized in that: The outer periphery of the right end of the deformable clamping portion (22) is provided with a matching surface that fits with the guide surface (3).

7. A pipe joint according to claim 1, characterized in that: The left end of the clamping sleeve (2) is recessed into the interior thereof to form a receiving cavity (4) that matches the head of the external joint.

8. A pipe joint according to claim 1, characterized in that: A first annular groove (6) is provided on the inner wall of the left end of the outer sleeve (1), and a sealing ring A (7) is embedded in the first annular groove.

9. A pipe joint according to claim 1, characterized in that: A second annular groove (8) is provided on the inner wall of the right end of the outer sleeve (1), and a sealing ring B (9) is embedded in the second annular groove.

10. A pipe joint according to claim 1, characterized in that: The clamping sleeve (2) and the outer sleeve (1) are clearance-matched.

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