Movable joint

Abstract

The utility model relates to a movable joint, which comprises a nut and a joint, one end of the outer peripheral wall of the joint is provided with external threads, the joint is connected with a pipeline through the external threads, the other end of the outer peripheral wall of the joint is provided with a circle of radial convex block, the radial convex block is inserted into a socket hole arranged on the nut through the joint, and the radial convex block and the inner end face of the socket hole abut against each other and are limited; the inner circumferential wall of the connector is provided with a pulling protruding block used for being matched with a special tool to pull the connector. According to the anti-theft connector, the wrenching protruding block is arranged on the inner circumferential wall of the connector, threaded connection between the connector and a pipeline can be achieved through a special tool, the connector can be prevented from being wrenched by any person, the anti-theft performance is more outstanding after installation, meanwhile, the wrenching protruding block is arranged on the inner circumferential wall of the connector, machining is more convenient, and the anti-theft performance is better. And the material utilization rate is higher.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline connectors, in particular to a flexible joint. Background Art

[0002] The flexible joint is now widely used in pipeline connection. It can be widely used in pipelines of different diameters, and can also be used in water meters and valves. It is a common pipeline connector that can be easily installed and disassembled. It has the advantages of wide application, easy installation and disassembly, quick connection, and easy management and maintenance. However, the outer wall of the joint of the existing flexible joint is hexagonal or has a protrusion, which not only wastes materials and is inconvenient to process, but also cannot prevent anyone from arbitrarily turning the joint with a wrench, which may cause uncontrollable phenomena after the pipeline is installed. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a flexible joint which is easy to process and can prevent anyone from turning it.

[0004] The purpose of the utility model is achieved through the following technical scheme. The flexible joint includes a nut and a joint. One end of the outer peripheral wall of the joint is provided with an external thread, which is connected to the pipeline through the external thread. The other end of the outer peripheral wall of the joint is provided with a circle of radial protrusions, which are inserted into the socket hole provided by the nut through the joint, so that the radial protrusions are abutted and limited by the inner end surface of the socket hole; the inner peripheral wall of the joint is provided with a lever protrusion for cooperating with a special tool to lever the joint.

[0005] The beneficial effects of the utility model are as follows: compared with the prior art, by providing a lever protrusion on the inner circumferential wall of the joint, a threaded connection between the joint and the pipe can be achieved by a special tool, which can prevent anyone from moving the joint, and the anti-theft performance after installation is more prominent; at the same time, by providing a lever protrusion on the inner circumferential wall of the joint, processing is more convenient and material utilization is higher.

[0006] Preferably, the lever protrusion block is arranged along the length direction of the inner circumferential wall of the joint, and one end of the lever protrusion block is flush with one end of the inner circumferential wall of the joint, and the other end of the lever protrusion block is flush with the other end of the inner circumferential wall of the joint; through the arrangement of the above structure, it is convenient for special tools to be inserted from either end, and the versatility is better. At the same time, the molding between the lever protrusion block and the inner circumferential wall of the joint is also more convenient, that is, the production and demolding of the blank are convenient.

[0007] Preferably, two actuating protrusions are provided and are symmetrically distributed along the axis of the joint; this makes the special tool more stable when actuating the joint and is less likely to slip during rotation.

[0008] Preferably, the cross section of the lever protrusion is a spire-shaped structure; this not only makes processing more convenient, but also makes it easier to match with special tools, and the firmness between the lever protrusion and the inner wall of the joint is also better.

[0009] Preferably, both ends of the lever protrusion along the length direction of the inner wall of the joint are provided with inwardly inclined chamfers; this makes the insertion and engagement of the special tool into the lever protrusion smoother and more convenient to use.

[0010] Preferably, the outer diameter of the other end of the outer peripheral wall of the joint is smaller than the outer diameter of the joint, and the outer peripheral wall of the joint at this end forms a step surface with the radial protrusion block, and a sealing ring is installed and limited by the step surface; the installation of the sealing ring is facilitated by setting the step surface.

[0011] Preferably, the inner wall of the nut is provided with an internal thread, which is connected to the pipeline through the internal thread, and the inner diameter of the internal thread is larger than the outer diameter of the radial protrusion block; this facilitates the connection between the nut and the pipeline, and also facilitates the insertion between the joint and the nut.

[0012] Preferably, the external thread is in the shape of a tapered thread and is inclined upward along the axial core line from the end face of the joint; by providing the tapered thread, the sealing performance of the connection between the joint and the pipeline is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the main cross-sectional structure of the movable joint of the utility model.

[0014] Figure 2 It is a schematic diagram of the side structure of the joint of the utility model.

[0015] The numbers in the accompanying drawings are: 1, nut; 2, joint; 3, lever protrusion; 11, socket; 12, internal thread; 21, external thread; 22, radial protrusion; 23, step surface; 31, chamfer. DETAILED DESCRIPTION

[0016] The following is a detailed introduction to the utility model in conjunction with the accompanying drawings: Figure 1 , 2 As shown, the utility model includes a nut 1 and a joint 2, one end of the outer circumferential wall of the joint 2 is provided with an external thread 21, and is connected to the pipeline through the external thread 21, and the other end of the outer circumferential wall of the joint 2 is provided with a circle of radial protrusions 22, which are inserted into the socket hole 11 provided in the nut 1 through the joint 2, and the radial protrusions 22 are abutted against and limited by the inner end surface of the socket hole 11; the inner circumferential wall of the joint 2 is provided with a lever protrusion 3 for cooperating with a special tool to lever the joint 2.

[0017] The lever protrusion block 3 is arranged along the length direction of the inner circumferential wall of the joint 2, and one end of the lever protrusion block 3 is flush with one end of the inner circumferential wall of the joint 2, and the other end of the lever protrusion block 3 is flush with the other end of the inner circumferential wall of the joint 2.

[0018] There are two pull-protruding blocks 3 , which are symmetrically distributed along the axis of the joint 2 .

[0019] The cross section of the lever protrusion block 3 is a spire-shaped structure, the bottom of the lever protrusion block 3 is integrally formed with the inner circumferential wall of the joint 2 , and the top of the lever protrusion block 3 faces the axial core line of the joint 2 .

[0020] Both ends of the lever protrusion block 3 along the length direction of the inner wall of the joint 2 are provided with inwardly inclined chamfers 31 .

[0021] The outer diameter of the other end of the outer peripheral wall of the joint 2 is smaller than the outer diameter of the joint 2 , and the outer peripheral wall of the joint 2 at this end forms a step surface 23 with the radial protrusion block 22 , and a sealing ring is installed and limited by the step surface 23 .

[0022] The inner circumferential wall of the nut 1 is provided with an internal thread 12 , which is connected to a pipeline via the internal thread 12 , and the inner diameter of the internal thread 12 is greater than the outer diameter of the radial protrusion 22 .

[0023] The external thread 21 is in the shape of a tapered thread and is inclined upward along the axial core line from the end surface of the joint 2 .

[0024] The working principle of the utility model is as follows: first, the joint 2 is passed through the socket 11, and the radial protrusion block 22 is abutted against and limited by the inner end surface of the socket 11, then, the sealing ring is inserted into the step surface 23, and finally, the external thread 21 of the joint 2 is screwed and connected to the pipeline by a special tool, and the nut 1 is screwed and fixed to the pipeline by the internal thread 12.

[0025] The present invention is not limited to the above-mentioned embodiments. Regardless of any changes in shape or material composition, any structural design provided by the present invention is a variation of the present invention and should be considered within the protection scope of the present invention.

Claims

1. A flexible joint, comprising a nut (1) and a joint (2), characterized in that: One end of the outer peripheral wall of the joint (2) is provided with an external thread (21) and is connected to a pipeline via the external thread (21); the other end of the outer peripheral wall of the joint (2) is provided with a circle of radial protrusions (22) and is inserted into the socket (11) provided in the nut (1) through the joint (2), so that the radial protrusions (22) abut against and limit the inner end surface of the socket (11); the inner peripheral wall of the joint (2) is provided with a moving protrusion (3) for cooperating with a special tool to move the joint (2).

2. The flexible joint according to claim 1, characterized in that: The actuating protrusion block (3) is arranged along the length direction of the inner peripheral wall of the joint (2), and one end of the actuating protrusion block (3) is flush with one end of the inner peripheral wall of the joint (2), and the other end of the actuating protrusion block (3) is flush with the other end of the inner peripheral wall of the joint (2).

3. The flexible joint according to claim 1 or 2, characterized in that: Two actuating protrusions (3) are provided and are symmetrically distributed along the axis of the joint (2).

4. The flexible joint according to claim 3, characterized in that: The cross section of the lever protrusion (3) is a spire-shaped structure.

5. The flexible joint according to claim 3, characterized in that: Both ends of the lever protrusion block (3) along the length direction of the inner wall of the joint (2) are provided with inwardly inclined chamfers (31).

6. The flexible joint according to claim 1, characterized in that: The outer diameter of the other end of the outer peripheral wall of the joint (2) is smaller than the outer diameter of the joint (2), and the outer peripheral wall of the joint (2) at this end and the radial protrusion block (22) form a step surface (23), and a sealing ring is installed and limited through the step surface (23).

7. The flexible joint according to claim 1, characterized in that: The inner peripheral wall of the nut (1) is provided with an internal thread (12), which is connected to a pipeline via the internal thread (12), and the inner diameter of the internal thread (12) is greater than the outer diameter of the radial protrusion (22).

8. The flexible joint according to claim 1, characterized in that: The external thread (21) is in the shape of a tapered thread and is inclined upward along the axial core line from the end surface of the joint (2).

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