Sealing structure for double-loose-joint ball valve

Abstract

The utility model discloses a sealing structure for a double-loose-joint ball valve, which belongs to the technical field of sealing structures and comprises a valve body and two connecting pipes, loose joint rings are fixedly connected to two side surfaces of the valve body through threads, the loose joint rings are sleeved on the connecting pipes, and the connecting pipes are connected with the valve body through threads. One sides of the two connecting pipes are located on the two sides of the valve body through abutting parts correspondingly, and a rotating ring is rotationally arranged in the loose joint ring. When a connecting pipe is prepared to be connected to a through opening in one side of the valve body, the loose joint ring can be rotated and can be in threaded connection to the valve body through the threads, during the period, the loose joint ring can drive the rotating ring to conduct threaded displacement, the rotating ring can extrude the abutting ring block and the spring through displacement, the spring can retract in the extrusion cavity, and therefore the valve body can be connected to the valve body. And the loose joint ring is pressed and rebounded by the spring, so that the thread fixation of the loose joint ring on the valve body is firmer, the loose joint ring is not easy to deflect and loosen, and the sealing stability of the connection of the connecting pipe is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of sealing structures, and particularly relates to a sealing structure for a double union ball valve. Background Art

[0002] The double union ball valve is a kind of valve. Both ends are made of PPR material, and the middle is a copper ball valve. The double union ball valve can be conveniently disassembled and replaced by the movable connection of the two union rings at both ends.

[0003] In traditional double union ball valves, both ends are often connected to pipes through union rings. However, the union rings are often fixedly connected by threads. Sometimes, the threads are prone to looseness due to external vibration or rubbing, resulting in poor sealing performance at the connection between the pipe and the valve body. Therefore, a sealing structure for a double union ball valve is needed to solve the above problems. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a sealing structure for a double union ball valve to solve the problems raised in the above background art.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A sealing structure for a double union ball valve includes a valve body and two connecting pipes. Both side surfaces of the valve body are fixedly connected with union rings through threads. The union rings are sleeved on the connecting pipes. One side of each of the two connecting pipes is respectively located on both sides of the valve body through abutting parts. A rotating ring is rotatably arranged inside the union ring. An extrusion cavity is formed inside the union ring in cooperation with the connecting pipe and the abutting part. A pressing ring block is slidably arranged inside the extrusion cavity. One side of the pressing ring block is fixedly provided with a spring. The other end of the spring is fixedly provided on the abutting part. The spring is sleeved on the corresponding connecting pipe.

[0006] By setting the above structure, when the connecting pipe is about to be connected to the through hole on one side of the valve body, the union ring can be rotated. The union ring will be connected to the valve body through threads. During this period, the union ring will drive the rotating ring to perform a threaded displacement. The rotating ring will displace and press the pressing ring block and the spring, causing the spring to retract inside the extrusion cavity. Then, the spring will rebound and press the union ring, making the threaded fixation of the union ring on the valve body more firm, so that the union ring will not easily deflect and loosen, which helps to ensure the sealing stability of the connection of the connecting pipe.

[0007] As a preferred embodiment, the abutting part is slidably arranged inside the union ring.

[0008] As a preferred embodiment, two connecting ring blocks are fixedly provided on the valve body.

[0009] As a preferred embodiment, sealing ring rings are fixedly arranged on one side of each of the two connecting ring blocks.

[0010] As a preferred embodiment, pressing ring grooves are formed on one side of each of the two union rings.

[0011] As a preferred embodiment, the pressing ring groove is adapted to the sealing ring ring.

[0012] By providing the sealing ring ring, when the union ring is displaced to one side of the connecting ring block through the thread, one side of the union ring presses and wraps the sealing ring ring through the pressing ring groove, so that the whole sealing ring ring is located at the gap between the union ring and the connecting ring block. Furthermore, it is difficult for external water vapor to enter the valve body through the union ring and the connecting ring block, which helps to improve the sealing performance of the connection between the valve body and the connecting pipe.

[0013] Compared with the prior art, the beneficial effects of the present utility model are:

[0014] In the present utility model, by providing a spring, when the connecting pipe is ready to be connected to the through port on one side of the valve body, the union ring can be rotated. The union ring will be threadedly connected to the valve body. During this period, the union ring will drive the rotating ring to perform threaded displacement. The rotating ring will displace and press the pressing ring block and the spring, so that the spring will retract in the extrusion cavity. Furthermore, the spring rebounds and presses against the union ring to make the threaded fixation of the union ring on the valve body more firm, so that the union ring will not easily deflect and loosen, which helps to ensure the sealing stability of the connection of the connecting pipe.

[0015] In the present utility model, by providing the sealing ring ring, when the union ring is displaced to one side of the connecting ring block through the thread, one side of the union ring presses and wraps the sealing ring ring through the pressing ring groove, so that the whole sealing ring ring is located at the gap between the union ring and the connecting ring block. Furthermore, it is difficult for external water vapor to enter the valve body through the union ring and the connecting ring block, which helps to improve the sealing performance of the connection between the valve body and the connecting pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the front three-dimensional structure of the present utility model;

[0017] Figure 2 is a schematic diagram of the partial cross-sectional three-dimensional structure of the present utility model;

[0018] Figure 3 is a schematic diagram of the cross-sectional three-dimensional structure of the union ring of the present utility model.

[0019] In the figure: 1, valve body; 2, connecting pipe; 3, union ring; 4, abutting part; 5, rotating ring; 6, extrusion cavity; 7, pressing ring block; 8, spring; 9, connecting ring block; 10, sealing ring ring; 11, pressing ring groove; 12, thread. Detailed implementation mode

[0020] The following further describes the present utility model in conjunction with embodiments.

[0021] The following embodiments are used to illustrate the present utility model, but cannot be used to limit the protection scope of the present utility model. The conditions in the embodiments can be further adjusted according to specific conditions. Any simple improvement of the method of the present utility model under the premise of the concept of the present utility model belongs to the scope protected by the present utility model.

[0022] Please refer to Figures 1-3 , the present utility model provides a sealing structure for a double-ferrule ball valve, including a valve body 1 and two connecting pipes 2. Both side surfaces of the valve body 1 are fixedly connected with ferrule rings 3 through threads 12. The ferrule rings 3 are sleeved on the connecting pipes 2. One side of each of the two connecting pipes 2 is respectively located on both sides of the valve body 1 through abutting parts 4. A rotating ring 5 is rotatably arranged inside the ferrule ring 3. An extrusion cavity 6 is formed inside the ferrule ring 3 in cooperation with the connecting pipe 2 and the abutting part 4. A pressing ring block 7 is slidably arranged inside the extrusion cavity 6. One side of the pressing ring block 7 is fixedly provided with a spring 8. The other end of the spring 8 is fixedly provided on the abutting part 4. The spring 8 is sleeved on the corresponding connecting pipe 2. By setting the above structure, when the connecting pipe 2 is about to be connected to the through port on one side of the valve body 1, the ferrule ring 3 can be rotated. The ferrule ring 3 will be threadedly connected to the valve body 1 through the thread 12. During this period, the ferrule ring 3 will drive the rotating ring 5 to perform a threaded displacement. The rotating ring 5 will displace and press the pressing ring block 7 and the spring 8, so that the spring 8 will retract inside the extrusion cavity 6. Then, the spring 8 will press and rebound against the ferrule ring 3 to make the threaded fixation of the ferrule ring 3 on the valve body 1 more firm, so that the ferrule ring 3 will not easily deflect and loosen, which helps to ensure the sealing stability of the connection between the connecting pipe 2 and the valve body 1.

[0023] The abutting part 4 is slidably arranged inside the ferrule ring 3.

[0024] Two connecting ring blocks 9 are fixedly arranged on the valve body 1.

[0025] One side of each of the two connecting ring blocks 9 is fixedly provided with a sealing ring ring 10.

[0026] One side of each of the two ferrule rings 3 is provided with a pressing ring groove 11.

[0027] The pressing ring groove 11 is adapted to the sealing ring ring 10. By setting the sealing ring ring 10, when the ferrule ring 3 is threadedly displaced to one side of the connecting ring block 9, one side of the ferrule ring 3 presses and wraps the sealing ring ring 10 through the pressing ring groove 11, so that the sealing ring ring 10 is integrally located at the gap between the ferrule ring 3 and the connecting ring block 9. Thus, it is difficult for external water vapor to enter the valve body 1 through the ferrule ring 3 and the connecting ring block 9, which helps to improve the sealing performance of the connection between the valve body 1 and the connecting pipe 2.

[0028] The working principle and usage process of the present utility model are as follows: First, when the connecting pipe 2 is ready to be connected to the through port on one side of the valve body 1, the movable joint ring 3 can be rotated. The movable joint ring 3 will be threadedly connected to the valve body 1 through the thread 12. During this period, the movable joint ring 3 will drive the rotating ring 5 to perform threaded displacement. The rotating ring 5 will displace and press the pressing ring block 7 and the spring 8 through displacement, so that the spring 8 will retract in the extrusion cavity 6. Furthermore, the spring 8 will rebound and press the movable joint ring 3 to make the threaded fixation of the movable joint ring 3 on the valve body 1 more firm, so that the movable joint ring 3 will not easily deflect and loosen. In addition, by setting the sealing ring 10, when the movable joint ring 3 is threadedly displaced to one side of the connecting ring block 9, one side of the movable joint ring 3 presses and wraps the sealing ring 10 through the pressing ring groove 11, so that the whole sealing ring 10 is located at the gap between the movable joint ring 3 and the connecting ring block 9. Furthermore, it is difficult for external water vapor to enter the valve body 1 through the movable joint ring 3 and the connecting ring block 9, which helps to improve the sealing performance of the connection between the valve body 1 and the connecting pipe 2.

[0029] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A sealing structure for a double joint ball valve, comprising a valve body (1) and two connecting pipes (2), characterized in that: Both side surfaces of the valve body (1) are fixedly connected with a movable ring (3) through a thread (12); the movable ring (3) is sleeved on the connecting pipe (2); one side of the two connecting pipes (2) is respectively located on both sides of the valve body (1) through abutment parts (4); a rotating ring (5) is rotatably arranged inside the movable ring (3); the interior of the movable ring (3) cooperates with the connecting pipe (2) and the abutment part (4) to form an extrusion chamber (6); a pressing ring block (7) is slidably arranged inside the extrusion chamber (6); a spring (8) is fixedly arranged on one side of the pressing ring block (7); the other end of the spring (8) is fixedly arranged on the abutment part (4); and the spring (8) is sleeved on the corresponding connecting pipe (2).

2. A sealing structure for a double joint ball valve according to claim 1, characterized in that: The abutment portion (4) is slidably arranged inside the movable ring (3).

3. A sealing structure for a double joint ball valve according to claim 1, characterized in that: Two connecting ring blocks (9) are fixedly arranged on the valve body (1).

4. A sealing structure for a double joint ball valve according to claim 3, characterized in that: A sealing ring (10) is fixedly arranged on one side of the two connecting ring blocks (9).

5. A sealing structure for a double joint ball valve according to claim 4, characterized in that: One side of the two movable rings (3) is provided with a pressing ring groove (11).

6. A sealing structure for a double joint ball valve according to claim 5, characterized in that: The pressure ring groove (11) is adapted to the sealing ring (10).

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