Leak-proof hard sealing butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, and discloses a leakproof hard sealing butterfly valve which comprises a valve body, a driving device is installed on the top of the valve body, a butterfly plate is arranged in the valve body, the driving device is used for driving the butterfly plate to rotate, a round hole is formed in the side wall, close to the valve body, of the butterfly plate, and the round hole is communicated with the valve body. A firing pin is arranged in the round hole, the end, away from the butterfly plate, of the firing pin penetrates through the valve body, a spherical operation head is arranged on the outer wall of the valve body, and the side, close to the valve body, of the spherical operation head is fixedly connected to the firing pin. According to the butterfly valve, the butterfly valve is closed through the driving device and the butterfly plate; the firing pin is driven to move towards the butterfly plate by pressing the spherical operating head, so that the firing pin slides towards the circular hole; whether the butterfly plate is really closed or not is judged according to whether the spherical operating head can be pressed or not; therefore, the situation that the traditional mode is not direct or accurate enough to detect the fitting condition of the sealing surface is improved.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, and in particular to a leak-proof hard-seal butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve that can be used for on / off control of low-pressure pipeline media. A butterfly valve is a type of valve whose closing element is a disc that rotates around the valve shaft to achieve opening and closing. The valve can be used to control the flow of various types of fluids such as air, water, steam, oil, liquid metals, and radioactive media.

[0003] Traditional butterfly valve closure determination methods mainly rely on limit indicators and limit switches. However, when impurities are stuck in the pipeline or the valve body expands thermally, a "false closure" situation may occur where the limit indicator is aligned but the butterfly plate and valve seat are not truly in contact and sealed. This makes the traditional method insufficiently direct and accurate in detecting the sealing surface contact, and it is difficult to meet the needs of some application scenarios with extremely high sealing requirements. Utility Model Content

[0004] To overcome the above shortcomings, this utility model provides a leak-proof hard-seal butterfly valve, which aims to improve the situation where the detection of the sealing surface fit is not direct and accurate enough by traditional methods.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a leak-proof hard-seal butterfly valve, comprising a valve body, a driving device installed on the top of the valve body, a butterfly plate disposed inside the valve body, the driving device being used to drive the butterfly plate to rotate, a circular hole being opened on the side wall of the butterfly plate near the valve body, a striking pin being disposed inside the circular hole, the end of the striking pin away from the butterfly plate passing through the valve body, and a spherical operating head being disposed on the outer wall of the valve body, the side of the spherical operating head near the valve body being fixedly connected to the striking pin.

[0006] Preferably, the driving device includes a driving assembly and a valve stem, the upper end of the valve stem is fixedly disposed on the lower side of the driving assembly, the outer wall of the valve stem passes through the upper part of the valve body, the lower end of the valve stem is rotatably connected to the lower part of the valve body, and the outer wall of the valve stem is fixedly connected to the rear side of the butterfly plate.

[0007] Preferably, the drive assembly includes a reducer and a handle, with the left side of the handle fixedly disposed on the right side of the reducer, and the lower side of the reducer fixedly disposed on the upper end of the valve stem.

[0008] Preferably, a through hole is provided on one side of the valve body, through which the striking pin passes.

[0009] Preferably, a rubber sealing box and a protective box are fixedly connected to one side of the valve body, the rubber sealing box is disposed inside the protective box, and the spherical operating head is disposed inside the rubber sealing box.

[0010] Preferably, the upper side of the protective box is connected to a hinge, the right side of the protective box is provided with a box cover, the upper right side of the box cover is connected to the hinge, the lower side of the box cover is provided with a duckbill buckle, and one side of the duckbill buckle is provided on the box cover.

[0011] Preferably, a sealing gasket is provided on the left side of the box lid.

[0012] Preferably, the outer wall of the firing pin is provided with an anti-corrosion layer.

[0013] This utility model has the following beneficial effects:

[0014] 1. In this utility model, the butterfly plate is rotated by rotating the drive device to close the butterfly valve. By pressing the ball-shaped operating head, the driving pin moves towards the butterfly plate. When the butterfly plate is fully closed, the pin slides into the round hole. If it is found that the ball-shaped operating head cannot be pressed, it means that the butterfly plate is not fully closed. This improves the traditional method's indirect and inaccurate detection of the sealing surface fit.

[0015] 2. In this utility model, the spherical operating head and the striking pin are sealed by the rubber sealing box, the rubber sealing box is protected by the protective box, and the sealing gasket achieves a seal between the box cover and the protective box, thereby slowing down the aging rate of the rubber sealing box and improving the service life of the device. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of a leak-proof hard-seal butterfly valve proposed in this utility model.

[0017] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0018] Figure 3 This is a side perspective view of a leak-proof hard-seal butterfly valve proposed in this utility model.

[0019] Figure 4 This is a schematic cross-sectional view of the striker section of a leak-proof hard-seal butterfly valve proposed in this utility model.

[0020] Legend:

[0021] 1. Valve body; 2. Drive unit; 20. Drive assembly; 201. Reducer; 202. Handle; 21. Valve stem; 3. Hinge; 4. Protective box; 5. Butterfly plate; 6. Round hole; 7. Through hole; 8. Duckbill buckle; 9. Rubber sealing box; 10. Sealing gasket; 11. Box cover; 12. Anti-corrosion layer; 13. Spherical operating head; 14. Impact pin. Detailed Implementation

[0022] The technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0023] Reference Figure 1 , Figure 2 and Figure 4 An embodiment of this utility model provides a leak-proof hard-seal butterfly valve, comprising a valve body 1, a drive device 2 mounted on the top of the valve body 1, a butterfly plate 5 disposed inside the valve body 1, the drive device 2 being used to drive the butterfly plate 5 to rotate, a circular hole 6 being opened on the side wall of the butterfly plate 5 near the valve body 1, a striking pin 14 being disposed inside the circular hole 6, the end of the striking pin 14 away from the butterfly plate 5 passing through the valve body 1, a spherical operating head 13 being disposed on the outer wall of the valve body 1, the side of the spherical operating head 13 near the valve body 1 being fixedly connected to the striking pin 14.

[0024] In this embodiment, Figure 1 The front, back, left, and right are the directions. When it is necessary to open the butterfly valve, pinch the ball-shaped operating head 13 and pull it outward, thereby pulling the striking pin 14 out of the round hole 6 and releasing the striking pin 14 from the butterfly plate 5; at the same time, the butterfly plate 5 is rotated by the rotation of the driving device 2, thus completing the opening action of the butterfly valve.

[0025] When the butterfly valve needs to be closed, the butterfly plate 5 is rotated by rotating the drive device 2 to close the butterfly valve. By pressing the ball-shaped operating head 13, the striking pin 14 is driven to move towards the butterfly plate 5. When the butterfly plate 5 is fully closed, the striking pin 14 slides into the round hole 6. If the ball-shaped operating head 13 cannot be pressed, it means that the butterfly plate 5 is not fully closed, and there may be foreign objects stuck between the butterfly plate 5 and the valve body 1. By rotating the drive device 2, the butterfly valve is slightly opened, and the foreign objects are flushed away by the flow of substances inside the valve body 1. The drive device 2 is then rotated again to close the butterfly plate 5. If the ball-shaped operating head 13 still cannot be pressed, it means that the butterfly plate 5 is still not fully closed, and the butterfly valve is leaking, which needs to be investigated. This improves the traditional method's inability to directly and accurately detect the sealing surface fit.

[0026] Reference Figure 1 The drive device 2 includes a drive assembly 20 and a valve stem 21. The upper end of the valve stem 21 is fixedly disposed on the lower side of the drive assembly 20. The outer wall of the valve stem 21 passes through the upper part of the valve body 1. The lower end of the valve stem 21 is rotatably connected to the lower part of the valve body 1. The outer wall of the valve stem 21 is fixedly connected to the rear side of the butterfly plate 5.

[0027] Specifically, when the butterfly valve is switched on or off, the rotation of the drive assembly 20 causes the valve stem 21 to rotate, and through the connection between the valve stem 21 and the valve body 1, and the connection between the valve stem 21 and the butterfly plate 5, the butterfly plate 5 rotates, thereby realizing the switching on or off of the butterfly valve.

[0028] Reference Figure 1 The drive assembly 20 includes a reducer 201 and a handle 202. The left side of the handle 202 is fixedly disposed on the right side of the reducer 201, and the lower side of the reducer 201 is fixedly disposed on the upper end of the valve stem 21.

[0029] Specifically, the reducer 201 is used for speed matching and torque transmission between the handle 202 and the valve stem 21, which is existing technology; by rotating the handle 202, the torque is converted and transmitted by the reducer 201, which drives the valve stem 21 to rotate, thereby realizing the rotation of the butterfly plate 5.

[0030] Reference Figure 2 and Figure 4 A through hole 7 is provided on one side of the valve body 1, and the firing pin 14 passes through the through hole 7.

[0031] Specifically, through the through hole 7, when the butterfly valve is opened or closed, the striker 14 slides within the through hole 7, thereby allowing the striker 14 to be inserted and removed in the round hole 6, thus locking the butterfly plate 5 and preventing leakage.

[0032] Reference Figure 2 , Figure 3 and Figure 4 A rubber sealing box 9 and a protective box 4 are fixedly connected to one side of the valve body 1. The rubber sealing box 9 is located inside the protective box 4, and the ball-shaped operating head 13 is located inside the rubber sealing box 9.

[0033] Specifically, the rubber sealing box 9 is made of rubber. The rubber sealing box 9 keeps the ball-shaped operating head 13 and the striking pin 14 in a sealed state. When the butterfly valve is opened, by pinching the ball-shaped operating head 13 and pulling it outward, the striking pin 14 slides out of the round hole 6. When the fluid flows inside the valve, the pressure is lower where the flow velocity is higher, and the fluid flows through the through hole 7 through the fit between the striking pin 14 and the through hole 7, preventing the fluid from leaking out of the through hole 7. The protective box 4 protects the rubber sealing box 9 from damage caused by external factors.

[0034] Reference Figure 1 and Figure 3 The upper side of the protective box 4 is connected to a hinge 3, and the right side of the protective box 4 is provided with a box cover 11. The upper right side of the box cover 11 is connected to the hinge 3, and the lower side of the box cover 11 is provided with a duckbill buckle 8. One side of the duckbill buckle 8 is provided on the box cover 11.

[0035] Specifically, the hinge 3 connects the lid 11 and the protective box 4; when the protective box 4 needs to be opened, the duckbill buckle 8 is opened to release the lock between the lid 11 and the protective box 4; when the protective box 4 needs to be closed, the lid 11 is closed to close the duckbill buckle 8, thereby locking the lid 11 and the protective box 4.

[0036] Reference Figure 3 A sealing gasket 10 is provided on the left side of the box lid 11.

[0037] Specifically, the sealing gasket 10 achieves a seal between the cover 11 and the protective box 4, thereby preventing external air, moisture, dust and other substances from entering the protective box 4, and thus slowing down the aging rate of the rubber sealing box 9.

[0038] Reference Figure 4 The outer wall of the firing pin 14 is provided with an anti-corrosion layer 12.

[0039] Specifically, the anti-corrosion layer 12 improves the corrosion resistance of the firing pin 14, thereby increasing its service life.

[0040] Working principle: When the butterfly valve needs to be opened, the cover 11 and the protective box 4 are connected by the hinge 3; the duckbill buckle 8 is opened to release the lock between the cover 11 and the protective box 4, and the cover 11 is flipped upward; the ball-shaped operating head 13 is pinched and pulled outward, so that the striking pin 14 slides out of the round hole 6, releasing the striking pin 14 from the butterfly plate 5; at the same time, by turning the handle 202, after the torque conversion and transmission through the reducer 201, the valve stem 21 is driven to rotate, which in turn drives the butterfly plate 5 to rotate, thus completing the opening of the butterfly valve.

[0041] When the butterfly valve needs to be closed, rotate the butterfly plate 5 to close the butterfly valve. By pressing the rubber sealing box 9, the rubber sealing box 9 applies force to the ball operating head 13, thereby driving the striker 14 to move towards the butterfly plate 5. When the butterfly plate 5 is fully closed, the striker 14 slides into the round hole 6 to lock the butterfly plate 5.

[0042] If the ball-shaped operating head 13 cannot be pressed, it indicates that the striking pin 14 is not aligned with the round hole 6, the butterfly plate 5 is not fully closed, and there may be foreign objects stuck between the butterfly plate 5 and the valve body 1. By rotating the drive device 2, the butterfly valve is slightly opened to flush away the foreign objects. Continue to rotate the drive device 2 to close the butterfly plate 5 again, so that the striking pin 14 slides into the round hole 6 to lock the butterfly plate 5. If the ball-shaped operating head 13 still cannot be pressed, it indicates that the butterfly plate 5 is still not fully closed, and the butterfly valve has a leak, which needs to be investigated. This improves the situation where the traditional method is not direct and accurate enough in detecting the sealing surface fit.

[0043] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A leak-proof hard-seal butterfly valve, comprising a valve body (1), characterized in that: A drive device (2) is installed on the top of the valve body (1). A butterfly plate (5) is provided inside the valve body (1). The drive device (2) is used to drive the butterfly plate (5) to rotate. A round hole (6) is opened on the side wall of the butterfly plate (5) near the valve body (1). A striker (14) is provided inside the round hole (6). The end of the striker (14) away from the butterfly plate (5) passes through the valve body (1). A spherical operating head (13) is provided on the outer wall of the valve body (1). The side of the spherical operating head (13) near the valve body (1) is fixedly connected to the striker (14).

2. The leak-proof hard-seal butterfly valve according to claim 1, characterized in that: The drive device (2) includes a drive assembly (20) and a valve stem (21). The upper end of the valve stem (21) is fixedly disposed on the lower side of the drive assembly (20). The outer wall of the valve stem (21) passes through the upper part of the valve body (1). The lower end of the valve stem (21) is rotatably connected to the lower part of the valve body (1). The outer wall of the valve stem (21) is fixedly connected to the rear side of the butterfly plate (5).

3. The leak-proof hard-seal butterfly valve according to claim 2, characterized in that: The drive assembly (20) includes a reducer (201) and a handle (202). The left side of the handle (202) is fixedly disposed on the right side of the reducer (201), and the lower side of the reducer (201) is fixedly disposed on the upper end of the valve stem (21).

4. The leak-proof hard-seal butterfly valve according to claim 1, characterized in that: A through hole (7) is provided on one side of the valve body (1), and the firing pin (14) passes through the through hole (7).

5. The leak-proof hard-seal butterfly valve according to claim 1, characterized in that: A rubber sealing box (9) and a protective box (4) are fixedly connected to one side of the valve body (1). The rubber sealing box (9) is located inside the protective box (4), and the spherical operating head (13) is located inside the rubber sealing box (9).

6. A leak-proof hard-seal butterfly valve according to claim 5, characterized in that: The upper side of the protective box (4) is connected to a hinge (3), and a box cover (11) is provided on the right side of the protective box (4). The upper right side of the box cover (11) is connected to the hinge (3), and a duckbill buckle (8) is provided on the lower side of the box cover (11). One side of the duckbill buckle (8) is provided on the box cover (11).

7. A leak-proof hard-seal butterfly valve according to claim 6, characterized in that: A sealing gasket (10) is provided on the left side of the box cover (11).

8. The leak-proof hard-seal butterfly valve according to claim 1, characterized in that: The outer wall of the firing pin (14) is provided with an anti-corrosion layer (12).

Images