Double-seal ball valve

Abstract

The utility model discloses a double-seal ball valve, and particularly relates to the technical field of ball valves, the double-seal ball valve comprises a first valve body and a second valve body, the top end of the first valve body is fixedly provided with a first connecting pipe communicated with the inside of the first valve body, the top end of the first connecting pipe is provided with a second connecting pipe, and valve cores are arranged in the first valve body and the second valve body. A first valve rod is fixedly connected to the top end of the valve element, and a second valve rod is arranged at the top end of the first valve rod. The outer ends of the valve element, the first valve rod and the second valve rod are sealed and protected through the first sealing ring and the second sealing ring, the elasticity is improved through the multiple first springs and the multiple second springs, the double-sealing effect in the ball valve is good, the first sealing ring and the second sealing ring are arranged at the detachable connecting positions, and the sealing effect is good. And therefore, the first sealing ring and the second sealing ring are simple and convenient to mount and replace, and the practicability is high.

Description

Technical Field

[0001] This utility model relates to the field of ball valve technology, specifically to a double-sealed ball valve. Background Technology

[0002] A ball valve is a valve in which the opening and closing element (ball) is driven by the valve stem and rotates around the valve's axis. It can be used for fluid regulation and control. The opening and closing element (ball) has a through hole. When the ball valve is in the open position, the through hole is aligned with the pipeline, allowing fluid to flow; when the ball valve is in the closed position, the through hole is misaligned with the pipeline, preventing fluid flow. Ball valves are characterized by quick opening and closing, low flow resistance, high pressure resistance, corrosion resistance, high reliability, versatility, and ease of operation.

[0003] Currently, ball valves are mostly sealed with rubber sealing rings inside. However, after prolonged compression and friction, the rubber rings may not make close enough contact with the valve core and valve stem, resulting in leakage. Since the sealing rings are located inside the ball valve, the process of disassembling and replacing them is also quite inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a double-sealed ball valve to address the aforementioned shortcomings in the technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a double-sealed ball valve, comprising:

[0006] A first valve body and a second valve body, wherein a first connecting pipe is fixedly provided at the top of the first valve body and communicates with its interior, and a second connecting pipe is provided at the top of the first connecting pipe, and a valve core is provided inside the first valve body and the second valve body, wherein a first valve stem is fixedly connected at the top of the valve core, and a second valve stem is provided at the top of the first valve stem, the first valve stem is located inside the first connecting pipe, and the top of the second valve stem extends to the top of the second connecting pipe and is rotatably connected to the second connecting pipe.

[0007] The first sealing assembly includes a first mounting groove formed on the inner wall of the connection between the first valve body and the second valve body. A first limiting groove is formed on the inner wall of the first mounting groove. A first sealing ring is provided inside the first limiting groove. The inner end of the first sealing ring is in close contact with the outer end of the valve core. A first limiting ring is fixedly provided at the outer end of the first sealing ring. The first limiting ring is located inside the first limiting groove. A first mounting cavity is formed inside the first sealing ring. A plurality of first springs are fixedly provided inside the first mounting cavity. A second sealing assembly with a similar structure to the first sealing assembly is provided at the connection between the first connecting pipe and the second connecting pipe.

[0008] Preferably, the second sealing assembly includes a second mounting groove formed on the inner wall of the connection between the first connecting pipe and the second connecting pipe, a second limiting groove formed on the inner wall of the second mounting groove, a second sealing ring provided inside the second mounting groove, the inner end of the second sealing ring being in close contact with the outer end of the connection between the first valve stem and the second valve stem, a second limiting ring fixedly provided at the outer end of the second sealing ring, the second limiting ring being provided inside the second limiting groove, a second mounting cavity formed inside the second sealing ring, and a plurality of second springs fixedly provided inside the second mounting cavity.

[0009] Preferably, a first flange is fixedly provided at the outer end of the connection between the first valve body and the second valve body, and the two first flanges are fixedly connected by a plurality of first bolts.

[0010] Preferably, a second flange is fixedly provided at the outer end of the connection between the first connecting pipe and the second connecting pipe, and the two second flanges are fixedly connected by a plurality of second bolts.

[0011] Preferably, a connecting square rod is fixedly provided at the bottom end of the second valve stem, and a connecting square groove corresponding to the size of the connecting square rod is provided at the top end of the first valve stem, with the connecting square rod disposed inside the connecting square groove.

[0012] Preferably, a handle is fixedly provided at the top of the second valve stem.

[0013] Preferably, a third flange is fixedly provided on the exterior of the ends of the first valve body and the second valve body that are far apart from each other.

[0014] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0015] The valve core, the first valve stem, and the outer ends of the second valve stem are sealed and protected by the first and second sealing rings. Multiple first and second springs are used to increase the elasticity, resulting in a good double sealing effect inside the ball valve. Both the first and second sealing rings are located at detachable connection points, making the installation and replacement of the first and second sealing rings simple and convenient, and highly practical. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2This is a schematic diagram of the overall three-dimensional sectional structure of this utility model;

[0019] Figure 3 This is a three-dimensional sectional view of the first and second valve bodies of this utility model.

[0020] Figure 4 This is a three-dimensional cross-sectional view of the first sealing ring and the first limiting ring of this utility model;

[0021] Figure 5 This is a three-dimensional cross-sectional view of the first connecting pipe and the second connecting pipe of this utility model;

[0022] Figure 6 This is a three-dimensional cross-sectional view of the second sealing ring and the second limiting ring of this utility model;

[0023] Figure 7 This is a schematic diagram of the connection structure of the valve core, the first valve stem, and the second valve stem of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. First valve body; 2. Second valve body; 3. First connecting pipe; 4. Second connecting pipe; 5. Valve core; 6. First valve stem; 7. Second valve stem; 8. First mounting groove; 9. First limiting groove; 10. First sealing ring; 11. First limiting ring; 12. First mounting cavity; 13. First spring; 14. Second mounting groove; 15. Second limiting groove; 16. Second sealing ring; 17. Second limiting ring; 18. Second mounting cavity; 19. Second spring; 20. First flange; 21. First bolt; 22. Second flange; 23. Second bolt; 24. Connecting square rod; 25. Connecting square groove; 26. Handle; 27. Third flange. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0027] This utility model provides, for example Figures 1 to 7 The double-sealed ball valve shown includes:

[0028] A first valve body 1 and a second valve body 2 are provided. The top end of the first valve body 1 is fixedly provided with a first connecting pipe 3 that communicates with its interior. The top end of the first connecting pipe 3 is provided with a second connecting pipe 4. The first valve body 1 and the second valve body 2 are provided with a valve core 5. The top end of the valve core 5 is fixedly connected with a first valve stem 6. The top end of the first valve stem 6 is provided with a second valve stem 7. The first valve stem 6 is located inside the first connecting pipe 3. The top end of the second valve stem 7 extends to the top of the second connecting pipe 4 and is rotatably connected to the second connecting pipe 4. Rotating the second valve stem 7 and the first valve stem 6 drives the valve core 5 to rotate. The through hole on the valve core 5 will be connected or closed as it rotates, so as to regulate the opening and closing of the ball valve.

[0029] The first sealing assembly includes a first mounting groove 8 formed on the inner wall of the connection between the first valve body 1 and the second valve body 2. A first limiting groove 9 is formed on the inner wall of the first mounting groove 8. A first sealing ring 10 is provided inside the first limiting groove 9. The inner end of the first sealing ring 10 is in close contact with the outer end of the valve core 5. A first limiting ring 11 is fixedly provided at the outer end of the first sealing ring 10. The first limiting ring 11 is located inside the first limiting groove 9. A first mounting cavity 12 is formed inside the first sealing ring 10. A plurality of first springs 13 are fixedly provided inside the first mounting cavity 12. A second sealing assembly with a similar structure to the first sealing assembly is provided at the connection between the first connecting pipe 3 and the second connecting pipe 4. The first sealing ring 10 can provide a first sealing at the contact position of the connection between the valve core 5 and the first valve body 1 and the second valve body 2. The plurality of first springs 13 will keep the elasticity of the first sealing ring 10 in a good state, thereby giving the first sealing ring 10 a continuous elastic force against the outer end of the valve core 5, so that its sealing effect is good.

[0030] The second sealing assembly includes a second mounting groove 14 formed on the inner wall of the connection between the first connecting pipe 3 and the second connecting pipe 4. A second limiting groove 15 is formed on the inner wall of the second mounting groove 14. A second sealing ring 16 is provided inside the second mounting groove 14. The inner end of the second sealing ring 16 is in close contact with the outer end of the connection between the first valve stem 6 and the second valve stem 7. A second limiting ring 17 is fixedly provided on the outer end of the second sealing ring 16. The second limiting ring 17 is located inside the second limiting groove 15. A second mounting cavity 18 is formed inside the second sealing ring 16. A plurality of second springs 19 are fixedly provided inside the second mounting cavity 18. The second sealing ring 16 can provide a second sealing at the contact position between the inner wall of the first connecting pipe 3 and the second connecting pipe 4 and the outer end of the first valve stem 6 and the second valve stem 7. The plurality of second springs 19 will keep the elasticity of the second sealing ring 16 in a good state, thereby giving the second sealing ring 16 a continuous elastic force against the outer end of the first valve stem 6 and the second valve stem 7, so that its sealing effect is better.

[0031] A first flange 20 is fixedly provided at the outer end of the connection between the first valve body 1 and the second valve body 2. The two first flanges 20 are fixedly connected by a plurality of first bolts 21. By removing the first bolts 21, the second valve body 2 can be removed from one end of the first valve body 1. At this time, the first sealing ring 10 and the first limiting ring 11 inside the first mounting groove 8 and the first limiting groove 9 can be removed, and then the first sealing ring 10 and the first limiting ring 11 can be replaced.

[0032] A second flange 22 is fixedly provided at the outer end of the connection between the first connecting pipe 3 and the second connecting pipe 4. The two second flanges 22 are fixedly connected by multiple second bolts 23. By removing the second bolts 23, the second connecting pipe 4 and the second valve stem 7 are removed from the top of the first connecting pipe 3 and the first valve stem 6. At this time, the connecting square rod 24 will leave the inside of the connecting square groove 25. In this way, the second sealing ring 16 and the second limiting ring 17 inside the second mounting groove 14 and the second limiting groove 15 can be removed, and then the second sealing ring 16 and the second limiting ring 17 can be replaced.

[0033] The bottom end of the second valve stem 7 is fixed with a connecting square rod 24, and the top end of the first valve stem 6 is provided with a connecting square groove 25 corresponding to the size of the connecting square rod 24. The connecting square rod 24 is located inside the connecting square groove 25. The insertion method of the connecting square rod 24 and the connecting square groove 25 makes the connection and disassembly process between the first valve stem 6 and the second valve stem 7 more convenient.

[0034] The top of the second valve stem 7 is fixed with a handle 26. It is easier to rotate the second valve stem 7 and the first valve stem 6 by turning the handle 26.

[0035] A third flange 27 is fixedly provided on the outside of the two valve bodies 1 and 2 at their opposite ends. The two third flanges 27 can be connected to external pipes by bolts.

[0036] This invention uses a first sealing ring 10 and a second sealing ring 16 to seal and protect the outer ends of the valve core 5, the first valve stem 6, and the second valve stem 7. Multiple first springs 13 and second springs 19 are used to enhance the elasticity, resulting in a better double sealing effect inside the ball valve. Furthermore, both the first sealing ring 10 and the second sealing ring 16 are located at detachable connection points, making installation and replacement of the first sealing ring 10 and the second sealing ring 16 simple and convenient, and highly practical. This embodiment specifically solves the problem in the prior art where ball valves, in actual use, mostly use internal rubber sealing rings for sealing. However, after prolonged compression and friction, the contact between the rubber ring and the valve core and valve stem becomes insufficient, leading to leakage. Moreover, because the sealing ring is located inside the ball valve, its disassembly and replacement are inconvenient.

[0037] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A double-sealed ball valve, characterized in that, include: A first valve body (1) and a second valve body (2). The top end of the first valve body (1) is fixedly provided with a first connecting pipe (3) that communicates with its interior. The top end of the first connecting pipe (3) is provided with a second connecting pipe (4). The first valve body (1) and the second valve body (2) are provided with valve cores (5). The top end of the valve core (5) is fixedly connected with a first valve stem (6). The top end of the first valve stem (6) is provided with a second valve stem (7). The first valve stem (6) is located inside the first connecting pipe (3). The top end of the second valve stem (7) extends to the top of the second connecting pipe (4) and is rotatably connected to the second connecting pipe (4). The first sealing assembly includes a first mounting groove (8) on the inner wall of the connection between the first valve body (1) and the second valve body (2). A first limiting groove (9) is provided on the inner wall of the first mounting groove (8). A first sealing ring (10) is provided inside the first limiting groove (9). The inner end of the first sealing ring (10) is in close contact with the outer end of the valve core (5). A first limiting ring (11) is fixedly provided at the outer end of the first sealing ring (10). The first limiting ring (11) is located inside the first limiting groove (9). A first mounting cavity (12) is provided inside the first sealing ring (10). A plurality of first springs (13) are fixedly provided inside the first mounting cavity (12). A second sealing assembly with a structure similar to the first sealing assembly is provided at the connection between the first connecting pipe (3) and the second connecting pipe (4).

2. The double-sealed ball valve according to claim 1, characterized in that: The second sealing assembly includes a second mounting groove (14) formed on the inner wall of the connection between the first connecting pipe (3) and the second connecting pipe (4). A second limiting groove (15) is formed on the inner wall of the second mounting groove (14). A second sealing ring (16) is provided inside the second mounting groove (14). The inner end of the second sealing ring (16) is in close contact with the outer end of the connection between the first valve stem (6) and the second valve stem (7). A second limiting ring (17) is fixedly provided on the outer end of the second sealing ring (16). The second limiting ring (17) is provided inside the second limiting groove (15). A second mounting cavity (18) is formed inside the second sealing ring (16). A plurality of second springs (19) are fixedly provided inside the second mounting cavity (18).

3. A double-sealed ball valve according to claim 1, characterized in that: The outer ends of the connection between the first valve body (1) and the second valve body (2) are both fixedly provided with a first flange (20), and the two first flanges (20) are fixedly connected by a plurality of first bolts (21).

4. A double-sealed ball valve according to claim 1, characterized in that: The outer ends of the connection between the first connecting pipe (3) and the second connecting pipe (4) are both fixedly provided with a second flange (22), and the two second flanges (22) are fixedly connected by a plurality of second bolts (23).

5. A double-sealed ball valve according to claim 1, characterized in that: The bottom end of the second valve stem (7) is fixedly provided with a connecting square rod (24), and the top end of the first valve stem (6) is provided with a connecting square groove (25) corresponding to the size of the connecting square rod (24). The connecting square rod (24) is located inside the connecting square groove (25).

6. A double-sealed ball valve according to claim 1, characterized in that: The second valve stem (7) has a handle (26) fixedly provided at its top end.

7. A double-sealed ball valve according to claim 1, characterized in that: A third flange (27) is fixedly provided on the exterior of the ends of the first valve body (1) and the second valve body (2) that are far apart from each other.

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