Bidirectional sealing ball valve

Abstract

The utility model belongs to the field of ball valves, and particularly relates to a two-way sealing ball valve which comprises a valve body of the two-way sealing ball valve, two sealing valve seats are installed on the inner side of the valve body in a sliding mode, and a plurality of protrusions are arranged on the outer sides of the two sealing valve seats. A valve cavity is formed in the valve body, a ball valve is rotatably mounted on the inner wall of the valve cavity, a linkage column is fixedly mounted at the top of the ball valve, a hexagonal groove is formed in the top of the linkage column, a valve sleeve is fixedly mounted at the top of the valve body, and a valve rod is slidably mounted on the inner side of the valve sleeve. And a buffer mechanism is arranged on the valve rod. When the ball valve is closed, the sealing valve seat can be tightly attached to the ball valve through the thrust of a medium, so that the leakage condition is effectively prevented, the influence of impact force on the valve rod can be effectively relieved through the arranged buffering mechanism, the service life of the valve rod is prolonged, and the durability of equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a bidirectional sealing ball valve. Background Art

[0002] Ball valves, whose opening and closing parts are driven by the valve stem and rotate around the axis of the ball valve, can also be used for regulating and controlling fluids. The hard-sealed V-type ball valve has a strong shear force between its V-type ball core and the metal valve seat with hard alloy surfacing, which is particularly suitable for media containing fibers, tiny solid particles, etc. The multi-way ball valve can not only flexibly control the confluence, diversion and flow direction switching of the media in the pipeline, but also close any channel to make the other two channels open;

[0003] When in use, a two-way sealing ball valve is often used to open and close the pipeline. However, when the existing two-way sealing ball valve is in use, it is easy for the valve seat and the ball valve to be loosely connected, resulting in leakage, which greatly affects the sealing performance of the ball valve. In addition, when opening or closing the ball valve, the medium pressure is too high, and sometimes the valve stem is subjected to excessive pressure and is damaged;

[0004] Therefore, we propose a two-way sealing ball valve to solve the above problems. Utility Model Content

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A two-way sealed ball valve comprises a valve body of the two-way sealed ball valve, two sealing valve seats are slidably mounted on the inner side of the valve body, and a plurality of protrusions are provided on the outer sides of the two sealing valve seats; a valve cavity is provided inside the valve body, a ball valve is rotatably mounted on the inner wall of the valve cavity, a linkage column is fixedly mounted on the top of the ball valve, a hexagonal groove is provided on the top of the linkage column, a valve sleeve is fixedly mounted on the top of the valve body, a valve stem is slidably mounted on the inner side of the valve sleeve, and a buffer mechanism is provided on the valve stem.

[0007] Specifically, barrier metal blocks are fixedly mounted on both sides of the valve body, and water inlet holes are opened on one side of the two barrier metal blocks to facilitate buffering of the medium.

[0008] Specifically, flanges are fixedly sleeved on the two blocking metal blocks to facilitate connection with pipelines.

[0009] Specifically, two buffer metal blocks are fixedly installed on the inner side of the valve body, and the sides of the two buffer metal blocks that are away from each other are both set as arc surfaces.

[0010] Specifically, a plurality of sliding grooves are provided on the inner side of the valve body, and a plurality of protrusions are slidably installed in the corresponding sliding grooves respectively. Sealing rubber rings are fixedly installed on the sides of the two sealing valve seats close to each other, and the two sealing rubber rings are in contact with the same ball valve, so as to enhance the sealing performance of the valve.

[0011] Specifically, a reinforcing rib is fixedly installed on the inner side of the ball valve to enhance the structural stability of the ball valve.

[0012] Specifically, the buffer mechanism includes a buffer spring, a limit ring and a positioning metal block. The limit ring and the positioning metal block are fixedly installed on the inner side of the valve sleeve. The valve stem slides through the limit ring and the positioning metal block. The outer side of the valve stem is sleeved with a buffer spring. The two ends of the buffer spring are respectively fixedly connected to the top of the linkage column and the bottom of the positioning metal block. A threaded groove is provided on the outer side of the valve stem, and a threaded hole is provided on the top of the positioning metal block. The threaded groove is matched with the threaded hole, and the positioning metal block can assist the movement of the valve stem.

[0013] Specifically, a hexagonal protrusion is provided at the bottom end of the valve stem, and the hexagonal protrusion is matched with the hexagonal groove. A hand wheel is fixedly installed at the other end of the valve stem, and the valve stem can be driven to rotate by the hand wheel.

[0014] Compared with the prior art, the beneficial effects of the utility model are: through the provided valve seat mechanism, the sealing valve seat and the ball valve can be tightly fitted together by the thrust of the medium when the ball valve is closed, thereby effectively preventing the occurrence of leakage, and through the provided buffer mechanism, the impact of the impact force on the valve stem can be effectively alleviated, thereby extending the service life of the valve stem and improving the durability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a three-dimensional structural schematic diagram of a bidirectional sealing ball valve proposed by the utility model;

[0016] Figure 2 This is a schematic cross-sectional view of the three-dimensional structure of a bidirectional sealing ball valve proposed by the utility model;

[0017] Figure 3 This is a schematic diagram of the three-dimensional structure of a valve seat mechanism of a bidirectional sealing ball valve proposed by the utility model;

[0018] Figure 4 It is a three-dimensional structural cross-sectional schematic diagram of a buffer mechanism of a bidirectional sealing ball valve proposed by the utility model;

[0019] Figure 5 The utility model is a schematic diagram of the three-dimensional structure disassembly of a buffer mechanism of a bidirectional sealing ball valve.

[0020] In the figure: 1. valve body; 2. flange; 3. blocking metal block; 4. valve chamber; 5. ball valve; 6. reinforcing ribs; 7. buffer metal block; 8. sealing valve seat; 9. sealing rubber ring; 10. linkage column; 11. sliding groove; 12. valve stem; 13. buffer spring; 14. threaded groove; 15. hand wheel; 16. limit ring; 17. positioning metal block; 18. valve sleeve. DETAILED DESCRIPTION

[0021] Reference Figure 1-5 A two-way sealed ball valve comprises a valve body 1 of the two-way sealed ball valve, two sealing valve seats 8 are slidably mounted on the inner side of the valve body 1, and a plurality of protrusions are arranged on the outer sides of the two sealing valve seats 8; a valve cavity 4 is opened inside the valve body 1, a ball valve 5 is rotatably mounted on the inner wall of the valve cavity 4, a linkage column 10 is fixedly mounted on the top of the ball valve 5, a hexagonal groove is opened on the top of the linkage column 10, a valve sleeve 18 is fixedly mounted on the top of the valve body 1, a valve stem 12 is slidably mounted on the inner side of the valve sleeve 18, and a buffer mechanism is arranged on the valve stem 12.

[0022] In this embodiment, barrier metal blocks 3 are fixedly mounted on both sides of the valve body 1 , and water inlet holes are opened on one side of the two barrier metal blocks 3 to facilitate buffering of the medium.

[0023] In this embodiment, flanges 2 are fixedly sleeved on the two blocking metal blocks 3 to facilitate connection with pipelines.

[0024] In this embodiment, two buffer metal blocks 7 are fixedly installed on the inner side of the valve body 1, and the sides of the two buffer metal blocks 7 that are away from each other are both configured as arc surfaces.

[0025] In this embodiment, a plurality of sliding grooves 11 are provided on the inner side of the valve body 1, and a plurality of protrusions are slidably installed in the corresponding sliding grooves 11 respectively. Sealing rubber rings 9 are fixedly installed on the sides of the two sealing valve seats 8 close to each other, and the two sealing rubber rings 9 are in contact with the same ball valve 5, so as to enhance the sealing performance of the valve.

[0026] In this embodiment, a reinforcing rib 6 is fixedly installed on the inner side of the ball valve 5 to enhance the structural stability of the ball valve 5 .

[0027] In this embodiment, the buffer mechanism includes a buffer spring 13, a limit ring 16 and a positioning metal block 17. The limit ring 16 and the positioning metal block 17 are fixedly installed on the inner side of the valve sleeve 18. The valve stem 12 slides through the limit ring 16 and the positioning metal block 17. The outer side of the valve stem 12 is sleeved with a buffer spring 13. The two ends of the buffer spring 13 are respectively fixedly connected to the top of the linkage column 10 and the bottom of the positioning metal block 17. A threaded groove 14 is opened on the outer side of the valve stem 12, and a threaded hole is opened on the top of the positioning metal block 17. The threaded groove 14 is adapted to the threaded hole, and the positioning metal block 17 can assist the movement of the valve stem 12.

[0028] In this embodiment, a hexagonal protrusion is provided at the bottom end of the valve stem 12, and the hexagonal protrusion is matched with the hexagonal groove. A hand wheel 15 is fixedly installed at the other end of the valve stem 12, and the valve stem 12 can be driven to rotate by the hand wheel 15.

[0029] Working principle: When in use, after the staff connects the valve to the pipeline through the flange 2, the ball valve 5 is in a closed state. The medium in the pipeline first impacts the blocking metal block 3, and part of the medium enters the valve body 1 through the blocking metal block 3. At this time, the arc shape of the buffer metal block 7 and the enlarged space can effectively alleviate the impact force of the medium. The medium then flows into the valve cavity 4. The inertia and pressure of the medium itself push the sealing valve seat 8 to move, so that the sealing rubber ring 9 fits tightly with the surface of the ball valve 5, thereby effectively preventing leakage. When the valve needs to be opened, the staff turns the hand wheel 15, and the hand wheel 15 drives the valve stem 12 to rotate. The rotation of the valve stem 12 drives the linkage column 10 to rotate and then drives the ball valve 5 to rotate. The instant the ball valve 5 is opened, the medium flow generates an impact force, which easily causes the ball valve 5 to vibrate. The vibration is transmitted to the valve stem 12 through the linkage column 10, and the valve stem 12 is slightly moved upward by the impact. At this time, the buffer spring 13 sleeved on the valve stem 12 relieves the impact force and assists the valve stem 12 to reset, thereby effectively protecting the valve stem 12 and extending its service life.

[0030] The technical progress achieved by the utility model compared with the prior art is that when the ball valve 5 is closed, the sealing valve seat 8 can be tightly fitted with the ball valve 5 through the thrust of the medium, thereby effectively preventing the occurrence of leakage, and the buffer mechanism is set to effectively alleviate the impact of the impact force on the valve stem 12, thereby extending the service life of the valve stem 12 and improving the durability of the equipment.

Claims

1. A two-way sealing ball valve, characterized in that: A valve body (1) of a bidirectional sealing ball valve is provided, wherein two sealing valve seats (8) are slidably mounted on the inner side of the valve body (1), and the outer sides of the two sealing valve seats (8) are each provided with a plurality of protrusions; A valve cavity (4) is provided inside the valve body (1), a ball valve (5) is rotatably mounted on the inner wall of the valve cavity (4), a linkage column (10) is fixedly mounted on the top of the ball valve (5), a hexagonal groove is provided on the top of the linkage column (10), a valve sleeve (18) is fixedly mounted on the top of the valve body (1), a valve stem (12) is slidably mounted on the inner side of the valve sleeve (18), and a buffer mechanism is provided on the valve stem (12).

2. A two-way sealing ball valve according to claim 1, characterized in that: Blocking metal blocks (3) are fixedly mounted on both sides of the valve body (1), and one side of the two blocking metal blocks (3) is provided with a water inlet hole.

3. A two-way sealing ball valve according to claim 2, characterized in that: The two blocking metal blocks (3) are both fixedly sleeved with flanges (2).

4. A two-way sealing ball valve according to claim 1, characterized in that: Two buffer metal blocks (7) are fixedly mounted on the inner side of the valve body (1), and the sides of the two buffer metal blocks (7) that are away from each other are both configured as arc surfaces.

5. A two-way sealing ball valve according to claim 1, characterized in that: The valve body (1) is provided with a plurality of sliding grooves (11) on the inner side thereof, and the plurality of protrusions are slidably mounted in the corresponding sliding grooves (11). A sealing rubber ring (9) is fixedly mounted on the mutually adjacent sides of the two sealing valve seats (8), and the two sealing rubber rings (9) are in contact with the same ball valve (5).

6. A two-way sealing ball valve according to claim 1, characterized in that: A reinforcing rib (6) is fixedly mounted on the inner side of the ball valve (5).

7. A two-way sealing ball valve according to claim 1, characterized in that: The buffer mechanism comprises a buffer spring (13), a limit ring (16) and a positioning metal block (17); the limit ring (16) and the positioning metal block (17) are fixedly installed on the inner side of the valve sleeve (18); the valve stem (12) slides through the limit ring (16) and the positioning metal block (17); the outer side of the valve stem (12) is sleeved with a buffer spring (13); the two ends of the buffer spring (13) are respectively fixedly connected to the top of the linkage column (10) and the bottom of the positioning metal block (17); the outer side of the valve stem (12) is provided with a threaded groove (14); the top of the positioning metal block (17) is provided with a threaded hole; the threaded groove (14) is adapted to the threaded hole.

8. A two-way sealing ball valve according to claim 7, characterized in that: A hexagonal protrusion is provided at the bottom end of the valve stem (12), the hexagonal protrusion is matched with the hexagonal groove, and a hand wheel (15) is fixedly mounted on the other end of the valve stem (12).

Images