Pipe connection structure

Abstract

The utility model discloses a pipe fitting connecting structure, including pipe fitting and connecting assembly, the pipe fitting end portion has at least one axial first guide surface of setting, the connecting assembly includes the first expansion sleeve of setting, the second expansion sleeve of connecting bolt and connecting nut, connecting bolt one end is connected with connecting nut thread, and the other end is provided with the guide end head that cooperates with first guide surface, when installing connection, screw into connecting nut inward, the connecting bolt is moved axially outward under the cooperation of first guide surface and guide end head, make connecting nut and connecting bolt move to each other, extrude first expansion sleeve and the second expansion sleeve to the middle, make first expansion sleeve and the second expansion sleeve open outward and lean on the pipe fitting inner side wall, and connecting assembly is firmly connected on the end portion of pipe fitting, replace the existing through pipe fitting punching, bolt fixed mode, simplify pipe fitting processing production, effectively solve the existing fixed mode, and the cabinet or shelf structure is not stable because of the problem of bolt loosening.

Description

Technical Field

[0001] This utility model relates to the field of pipe fitting connection technology, and more specifically, to a pipe fitting connection structure. Background Technology

[0002] Cabinets and shelves are common storage tools, and they are often assembled from tubular components to facilitate logistics and transportation.

[0003] Manufacturers typically prefabricate pipe fittings to various specifications to meet the actual needs of assembling cabinets or shelves, and users only need to assemble the pipe fittings.

[0004] The existing pipe fittings are generally connected by bolts, which requires manufacturers to pre-drill threaded holes at the pipe fitting connection ends, making pipe fitting production troublesome. At the same time, the bolt fixing method is prone to loosening after the cabinets and shelves shake for a long time, resulting in structural instability. Utility Model Content

[0005] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a pipe fitting connection structure.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] A pipe fitting connection structure includes a pipe fitting and a connection assembly, wherein the pipe fitting has at least one axially arranged first guide surface at its end;

[0008] The connecting assembly includes a connecting bolt and a connecting nut on which a first expansion sleeve and a second expansion sleeve are fitted. One end of the connecting bolt is threaded to the connecting nut, and the other end is provided with a guide end that mates with a first guide surface.

[0009] Tighten the connecting nut inward, and the connecting bolt moves outward under the cooperation of the first guide surface and the guide end, causing the first expansion sleeve and the second expansion sleeve to squeeze each other and open outward to abut against the inner wall of the pipe.

[0010] The present invention further includes: a wedge-shaped first extrusion part is provided on one side of the first expansion sleeve, and a first insertion groove is provided on the other side;

[0011] The second expansion sleeve has a wedge-shaped second extrusion part on one side and a second insertion groove on the other side;

[0012] The first expansion sleeve and the second expansion sleeve are inserted into each other, and the first extrusion part is inserted into the second insertion groove to extrude the second expansion sleeve outward.

[0013] The second extrusion part is inserted into the first insertion slot and extrudes the second expansion sleeve outward.

[0014] The present invention further includes: an isolation sleeve is provided inside the connecting bolt, and the first expansion sleeve and the second expansion sleeve are sleeved on the outside of the isolation sleeve.

[0015] The present invention further provides that: the outer wall of the isolation sleeve is provided with at least one axially arranged second guide surface, and both the first expansion sleeve and the second expansion sleeve are axially arranged with a third guide surface that cooperates with the second guide surface.

[0016] The present invention further includes: a pair of first guide surfaces are provided on the end of the pipe fitting, wherein the pair of first guide surfaces are arranged opposite to each other.

[0017] The present invention further comprises: the connecting nut is a hexahedron, wherein each face is provided with a connecting screw hole.

[0018] The beneficial effects of this utility model are as follows: The pipe fitting connection structure includes a pipe fitting and a connecting assembly for connecting the pipe fitting. The connecting assembly includes a connecting bolt and a connecting nut. One end of the connecting bolt is threadedly connected to the connecting nut, and the other end is provided with a guide end that mates with a first guide surface inside the pipe fitting. During installation, the connecting nut is screwed inward, and the connecting bolt moves axially outward under the cooperation of the first guide surface and the guide end. This causes the connecting nut and the connecting bolt to move towards each other, squeezing the first expansion sleeve and the second expansion sleeve in the middle. This causes the first expansion sleeve and the second expansion sleeve to open outward and abut against the inner wall of the pipe fitting, firmly connecting the connecting assembly to the end of the pipe fitting. This replaces the existing method of fixing the pipe fitting by drilling holes and bolts, simplifying the pipe fitting processing and production. At the same time, it effectively solves the problem of unstable cabinet or shelf structures caused by loose bolts in the existing fixing method. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a pipe fitting connection structure according to the present invention;

[0020] Figure 2 This is a schematic diagram of the pipe fitting connection structure according to the present invention;

[0021] Figure 3 This is a schematic diagram of the connection assembly of a pipe fitting connection structure according to the present invention;

[0022] Figure 4 This is a diagram showing the fit between the isolation sleeve and the connecting bolts in a pipe fitting connection structure according to this utility model.

[0023] Figure 5 This is a diagram showing the fit between the first expansion sleeve and the second expansion sleeve of a pipe fitting connection structure according to this utility model.

[0024] Explanation of reference numerals in the attached drawings: 1. Pipe fitting; 11. First guide surface; 2. Connecting assembly; 21. Connecting bolt; 211. Guide end; 22. Connecting nut; 221. Connecting screw hole; 23. First expansion sleeve; 231. First extrusion part; 232. First insertion groove; 24. Second expansion sleeve; 241. Second extrusion part; 242. Second insertion groove; 25. Isolation sleeve; 251. Second guide surface; 3. Third guide surface. Detailed Implementation

[0025] See attached document Figures 1 to 5 The present invention provides a more detailed description of a pipe fitting connection structure.

[0026] A pipe fitting connection structure includes a pipe fitting 1 and a connection assembly 2, wherein the pipe fitting 1 has at least one axially arranged first guide surface 11 inside its end;

[0027] The connecting assembly 2 includes a connecting bolt 21 and a connecting nut 22 on which a first expansion sleeve 23 and a second expansion sleeve 24 are fitted. One end of the connecting bolt 21 is threadedly connected to the connecting nut 22, and the other end is provided with a guide end 211 that mates with the first guide surface 11.

[0028] During installation, the connecting nut 22 is screwed inward. The connecting bolt 21 moves outward axially under the cooperation of the first guide surface 11 and the guide end 211, causing the connecting nut 22 and the connecting bolt 21 to move towards each other, pressing the first expansion sleeve 23 and the second expansion sleeve 24 towards the middle. This causes the first expansion sleeve 23 and the second expansion sleeve 24 to open outward and abut against the inner wall of the pipe fitting 1, firmly connecting the connecting assembly 2 to the end of the pipe fitting 1. This replaces the existing method of fixing the pipe fitting 1 by drilling holes and bolts, simplifying the processing and production of the pipe fitting 1. At the same time, it effectively solves the problem of unstable cabinet or shelf structure caused by loose bolts in the existing fixing method.

[0029] The first expansion sleeve 23 has a wedge-shaped first extrusion part 231 on one side and a first insertion groove 232 on the other side; the second expansion sleeve 24 has a wedge-shaped second extrusion part 241 on one side and a second insertion groove 242 on the other side.

[0030] Tighten in the connecting nut 22. The connecting nut 22 and the connecting bolt 21 drive the first expansion sleeve 23 and the second expansion sleeve 24 to move towards each other. The first expansion sleeve 23 and the second expansion sleeve 24 insert into each other. The first pressing part 231 is inserted into the second insertion groove 242 and presses the second expansion sleeve 24 outward. The second pressing part 241 is inserted into the first insertion groove 232 and presses the second expansion sleeve 24 outward. This causes the outer walls of the first expansion sleeve 23 and the second expansion sleeve 24 to press the inner wall of the pipe fitting 1 outward, thus firmly connecting the connecting assembly 2 to the pipe fitting 1.

[0031] The connecting bolt 21 is fitted with an isolation sleeve 25, and the first expansion sleeve 23 and the second expansion sleeve 24 are fitted on the outside of the isolation sleeve 25. The first expansion sleeve 23 and the second expansion sleeve 24 are interlocked on the outside of the isolation sleeve 25 to avoid interference between the connecting bolt 21 and the first expansion sleeve 23 and the second expansion sleeve 24 during movement.

[0032] The outer wall of the isolation sleeve 25 is provided with at least one axially arranged second guide surface 251, and the first expansion sleeve 23 and the second expansion sleeve 24 are both axially arranged with a third guide surface 3 that cooperates with the second guide surface 251; such that when the connecting nut 22 is screwed in, the connecting nut 22 squeezes the first expansion sleeve 23 and the second expansion sleeve 24, and the first expansion sleeve 23 and the second expansion sleeve 24 move towards each other and are squeezed and deformed by the cooperation of the corresponding third guide surface 3 and the second guide surface 251.

[0033] The pipe fitting 1 has a pair of first guide surfaces 11 at its end, which are arranged opposite to each other; this better restricts the connecting bolt 21, so that the connecting bolt 21 can only move outward axially during the process of screwing the connecting nut 22 inward.

[0034] The connecting nut 22 is a hexahedron, with connecting screw holes 221 on each face, allowing users to connect the pipe fitting 1 according to their actual needs and assemble it.

[0035] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A pipe fitting connection structure, characterized in that: Includes pipe fittings and connecting assemblies, wherein the pipe fitting has at least one axially arranged first guide surface inside its end; The connecting assembly includes a connecting bolt and a connecting nut on which a first expansion sleeve and a second expansion sleeve are fitted. One end of the connecting bolt is threaded to the connecting nut, and the other end is provided with a guide end that mates with a first guide surface. Tighten the connecting nut inward, and the connecting bolt moves outward under the cooperation of the first guide surface and the guide end, causing the first expansion sleeve and the second expansion sleeve to squeeze each other and open outward to abut against the inner wall of the pipe.

2. The pipe fitting connection structure according to claim 1, characterized in that: The first expansion sleeve has a wedge-shaped first extrusion part on one side and a first insertion groove on the other side; The second expansion sleeve has a wedge-shaped second extrusion part on one side and a second insertion groove on the other side; The first expansion sleeve and the second expansion sleeve are inserted into each other, and the first extrusion part is inserted into the second insertion groove to extrude the second expansion sleeve outward. The second extrusion part is inserted into the first insertion slot and extrudes the second expansion sleeve outward.

3. The pipe fitting connection structure according to claim 2, characterized in that: An isolation sleeve is provided inside the connecting bolt, and the first expansion sleeve and the second expansion sleeve are sleeved on the outside of the isolation sleeve.

4. The pipe fitting connection structure according to claim 3, characterized in that: The outer wall of the isolation sleeve is provided with at least one axially arranged second guide surface, and both the first expansion sleeve and the second expansion sleeve are axially provided with a third guide surface that cooperates with the second guide surface.

5. A pipe fitting connection structure according to claim 1, 2, 3, or 4, characterized in that: The pipe fitting has a pair of first guide surfaces at its end, wherein the pair of first guide surfaces are arranged opposite to each other.

6. A pipe fitting connection structure according to claim 1, 2, 3, or 4, characterized in that: The connecting nut is a hexahedron, with a connecting screw hole provided on each face.

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