A butterfly valve that prevents valve plate displacement

Abstract

This utility model discloses a butterfly valve that prevents valve plate displacement, including a valve body and a valve plate connected to the valve body. The valve plate is connected to a valve stem, and a rotating wheel is connected to the end of the valve stem. Flanges are connected to the front and rear ends of the valve body. A transmission housing is connected to the outer side of the valve body, and a positioning mechanism for positioning the valve plate is connected to the transmission housing. The positioning mechanism includes two moving plates, two positioning heads, and two studs. The studs drive the moving plates to reciprocate. The positioning heads are connected to the ends of the moving plates and match positioning grooves provided on the outer side of the valve plate. A drive mechanism is connected to the studs to drive the two studs to rotate. This utility model can achieve valve plate positioning and locking, improve valve plate stability, prevent displacement due to large water flow impacts, and is safe, reliable, simple, convenient, and highly flexible in use.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a butterfly valve that can prevent valve plate displacement. Background Technology

[0002] A valve is a mechanical device that controls the flow of fluids (liquid, gas, slurry media). It controls the flow rate, pressure, or direction of the medium in a pipeline system by opening, closing, regulating, or changing the flow direction. A butterfly valve is a type of valve widely used in pipeline systems for liquids, gases, and certain solid particulate media. It is used to control the flow direction of fluids, regulate the flow rate, or perform simple opening and closing controls. Its design features make butterfly valves ideal for large-diameter pipelines and applications with limited space.

[0003] The authorized publication number is CN220646798U, entitled "A Butterfly Valve Plate Sealing Protection Device." It states that "rotating the adjusting screw 61 on the cover plate 60 brings the sealing blocks 62 closer together. The spring 64 rebounds, causing the arrival block 63 to pop out, making it contact the valve plate 3 and limit its movement. This further seals the valve plate 3, preventing displacement when the water flow in the channel increases." During operation, the two adjusting screws 61 need to be adjusted... Rotation is rather troublesome. Secondly, the rebound of spring 64 will eject the arrival block 63. At this time, spring 64 is in a relatively extended state, which makes the pressure exerted by arrival block 63 on valve plate 3 less. When valve plate 3 is subjected to a large water flow impact, it may cause the valve plate 3 to have a displacement risk. Furthermore, when arrival block 63 is inserted into sealing block 62, sealing block 62 moves backward, and the inner inclined surface of arrival block 63 slides relative to valve pipe 1. It is necessary to overcome the pushing force exerted by spring 64 on arrival block 63, making it more difficult to rotate adjustment screw 61. Utility Model Content

[0004] The purpose of this utility model is to provide a butterfly valve that can prevent valve plate displacement, thereby achieving valve plate positioning and locking, improving valve plate stability, avoiding displacement due to large water flow impact, and offering the advantages of safe and reliable use, simple and convenient operation, thus solving the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a butterfly valve that prevents valve plate displacement, comprising a valve body and a valve plate connected to the valve body, the valve plate being connected to a valve stem, the end of the valve stem being connected to a rotating wheel, flanges being connected to the front and rear ends of the valve body, a transmission housing being connected to the outer side of the valve body, and a positioning mechanism for positioning the valve plate being connected to the transmission housing, the positioning mechanism comprising two moving plates, two positioning heads, and two studs, the studs being used to drive the moving plates to reciprocate, the positioning heads being connected to the ends of the moving plates and matching the positioning grooves provided on the outer side of the valve plate, and the studs being connected to a drive mechanism for driving the two studs to rotate.

[0006] Preferably, the positioning mechanism further includes two sealing grooves, which are disposed in the valve body and match the positioning head.

[0007] Preferably, a sealing surface is provided on the inner side of the sealing groove.

[0008] Preferably, the movable plate has a square cross-section and is slidably connected to the valve body.

[0009] Preferably, the stud is threadedly connected to the movable plate.

[0010] Preferably, the driving mechanism includes a handle, a connecting shaft, a driving gear, a gear, two driven gears, two transmission rods, two conical teeth (first type), and two conical teeth (second type). The handle is used to drive the connecting shaft and the gear to rotate synchronously. The gear meshes with the driving gear. The driving gear is connected to the two driven gears via a transmission chain. The two ends of the transmission rods are connected to the conical teeth (first type) and the driven gears. The conical teeth (first type) mesh with the conical teeth (second type). The conical teeth (second type) are fixed to a stud.

[0011] Preferably, both ends of the connecting shaft are connected to the handle and the gear, and the connecting shaft is rotatably connected to the transmission housing, and the driving gear, the gear and the driven gear are rotatably connected to the transmission housing.

[0012] Preferably, the end of the stud is rotatably connected to the transmission housing.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: This utility model is equipped with a positioning mechanism and a driving mechanism. When the valve is closed, rotating the handle drives the gear to rotate, the gear drives the drive gear to rotate, and then drives the two driven gears to rotate. The driven gears drive the transmission rod and the first conical gear to rotate. The first conical gear and the second conical gear cooperate to realize the rotation of the stud, which can drive the moving plate and the positioning head to move forward. The positioning head is connected to the positioning groove of the valve plate to realize the positioning and locking of the valve plate, improve the stability of the valve plate, and avoid displacement caused by the valve plate being impacted by a large water flow. It is safe and reliable to use, simple and convenient to operate, and highly flexible. Attached Figure Description

[0014] Figure 1 This is a frontal perspective view of the present invention;

[0015] Figure 2 This is a schematic diagram of the connection structure between the driving tooth and the driven tooth of this utility model.

[0016] Figure 3 This is a schematic diagram of the connection structure between the driven tooth and the moving plate of this utility model;

[0017] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0018] Figure 5 This is a schematic diagram of the connection structure between the movable plate and the valve body of this utility model;

[0019] Figure 6 for Figure 5 A partial view.

[0020] In the diagram: 1. Valve body; 2. Transmission housing; 3. Valve plate; 4. Flange; 5. Rotating wheel; 6. Valve stem; 7. Handle; 8. Drive gear; 9. Gear; 10. Driven gear; 11. Transmission rod; 12. Moving plate; 13. Conical gear one; 14. Conical gear two; 15. Stud; 16. Positioning groove; 17. Sealing groove; 18. Positioning head. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 6 This utility model provides a butterfly valve that can prevent valve plate displacement, including a valve body 1 and a valve plate 3 connected inside the valve body 1. The valve plate 3 is connected to a valve stem 6, and the end of the valve stem 6 is connected to a rotating wheel 5. The front and rear ends of the valve body 1 are connected to flanges 4, which facilitate connection to a conveying pipeline. A transmission housing 2 is connected to the outside of the valve body 1. The transmission housing 2 is connected to a positioning mechanism for positioning the valve plate 3. The positioning mechanism includes two moving plates 12, two positioning heads 18, and two studs 15. The studs 15 are used to drive the moving plates 12 to reciprocate. The positioning heads 18 are connected to the ends of the moving plates 12 and match the positioning grooves 16 provided on the outside of the valve plate 3. The studs 15 are connected to a drive mechanism for driving the two studs 15 to rotate.

[0023] In use, rotating the rotating wheel 5 drives the valve stem 6 to rotate, and the valve stem 6 drives the valve plate 3 to rotate, which facilitates multi-angle adjustment of the valve plate 3 and realizes water flow control.

[0024] When the valve plate 3 is in the closed state, rotating the handle 7 drives the gear 9 to rotate, the gear 9 drives the drive gear 8 to rotate, and the drive gear 8 drives the two driven gears 10 to rotate synchronously through the transmission chain. The driven gears 10 drive the transmission rod 11 and the first conical gear 13 to rotate. The first conical gear 13 and the second conical gear 14 cooperate to realize the rotation of the stud 15, which can push the moving plate 12 and the positioning head 18 forward, so that the positioning head 18 connects with the positioning groove 16 of the valve plate 3, realizing good limiting and fixing of the valve plate 3, avoiding displacement due to the impact of large water flow on the valve plate 3, making it safe and reliable to use, simple and convenient to operate, and highly flexible.

[0025] The positioning mechanism also includes two sealing grooves 17, which are located on the valve body 1 and match the positioning head 18. A sealing surface is provided on the inner side of each sealing groove 17. When the valve plate 3 is in the open state, the positioning head 18 is pressed against the sealing groove 17, meaning the positioning head 18 connects with the sealing surface, achieving a good seal and preventing leakage.

[0026] The movable plate 12 has a square cross-section and is slidably connected to the valve body 1. This not only improves the stability of the reciprocating movement of the movable plate 12 and makes the positioning head 18 move steadily, but also facilitates the precise docking of the positioning head 18 with the positioning groove 16. It also improves the sealing performance of the connection between the movable plate 12 and the valve body 1.

[0027] The stud 15 is threadedly connected to the movable plate 12, and the forward and reverse rotation of the stud 15 facilitates the reciprocating movement of the movable plate 12.

[0028] The drive mechanism includes a handle 7, a connecting shaft, a drive gear 8, a gear 9, two driven gears 10, two transmission rods 11, two conical teeth 13, and two conical teeth 14. The handle 7 drives the connecting shaft and gear 9 to rotate synchronously. Gear 9 meshes with drive gear 8, and drive gear 8 is connected to the two driven gears 10 via a transmission chain. Both ends of transmission rods 11 are connected to conical teeth 13 and driven gears 10. Conical teeth 13 mesh with conical teeth 14, and conical teeth 14 are fixed to studs 15. Drive gear 8 has internal teeth on its inner side and external teeth on its outer side. Gear 9 is connected to the internal teeth, while the external teeth are connected to the two driven gears 10 via a transmission chain. The diameter of drive gear 8 is larger than that of driven gear 10, which helps to form a larger wrap angle, thereby improving the stability and efficiency of the transmission.

[0029] The two ends of the connecting shaft are connected to the handle 7 and the gear 9, and the connecting shaft is rotatably connected to the transmission housing 2. The driving gear 8, the gear 9 and the driven gear 10 are rotatably connected inside the transmission housing 2, which improves the stability of the rotation of the driving gear 8, the gear 9 and the driven gear 10.

[0030] The end of the stud 15 is rotatably connected to the transmission housing 2, ensuring stable rotation of the stud 15 and effectively driving the moving plate 12 to reciprocate. Secondly, the second conical tooth 14 also rotates stably, ensuring the transmission effect between the second conical tooth 14 and the first conical tooth 13.

[0031] Working principle: When valve plate 3 is closed, rotating wheel 5 drives valve stem 6 to rotate, which in turn drives valve plate 3 to rotate, making valve plate 3 perpendicular to the water flow direction. Then, manually drive handle 7 to rotate, which drives connecting shaft and gear 9 to rotate. Gear 9 drives drive gear 8 to rotate, and drive gear 8 drives two driven gears 10 to rotate through transmission chain. Driven gear 10 drives transmission rod 11 and conical gear 13 to rotate. Conical gear 13 and conical gear 14 cooperate to rotate stud 15. Stud 15 drives moving plate 12 and positioning head 18 to move forward, so that positioning head 18 connects with positioning groove 16, which facilitates positioning and locking of valve plate 3, improves the stability of valve plate 3, and prevents displacement of valve plate 3 due to large water flow impact. The operation is simple and convenient. When the valve plate 3 is opened, the rotary wheel 5 drives the drive gear 8 to rotate. Then, through the mutual cooperation of the driven gear 10, the transmission rod 11, the first conical gear 13, and the second conical gear 14, the stud 15 drives the moving plate 12 and the positioning head 18 to move backward. The positioning head 18 presses against the sealing groove 17 to achieve good sealing and avoid leakage. At this time, the valve plate 3 is completely loosened, making it convenient to open.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A butterfly valve capable of preventing displacement of a valve plate, comprising a valve body (1) and a valve plate (3) connected to the valve body (1), the valve plate (3) being connected with a valve rod (6), an end of the valve rod (6) being connected with a rotating wheel (5), the front and rear ends of the valve body (1) being connected with flanges (4), characterized in that, The valve body (1) is connected to a transmission housing (2) on the outside. The transmission housing (2) is connected to a positioning mechanism for positioning the valve plate (3). The positioning mechanism includes two moving plates (12), two positioning heads (18), and two studs (15). The studs (15) are used to drive the moving plates (12) to move back and forth. The positioning heads (18) are connected to the ends of the moving plates (12) and are matched with the positioning grooves (16) provided on the outside of the valve plate (3). The studs (15) are connected to a driving mechanism for driving the two studs (15) to rotate.

2. The butterfly valve for preventing valve plate displacement according to claim 1, characterized in that, The positioning mechanism also includes two sealing grooves (17), which are disposed on the valve body (1) and match the positioning head (18).

3. A butterfly valve for preventing valve plate displacement according to claim 2, characterized in that, A sealing surface is provided on the inner side of the sealing groove (17).

4. A butterfly valve for preventing valve plate displacement according to claim 1, characterized in that, The cross-section of the movable plate (12) is square, and the movable plate (12) is in a sealed sliding connection with the valve body (1).

5. A butterfly valve according to claim 4 that prevents valve plate displacement, characterized in that, The stud (15) is threadedly connected to the movable plate (12).

6. A butterfly valve for preventing valve plate displacement according to claim 1, characterized in that, The drive mechanism includes a handle (7), a connecting shaft, a drive gear (8), a gear (9), two driven gears (10), two transmission rods (11), two conical teeth (13) and two conical teeth (14). The handle (7) is used to drive the connecting shaft and the gear (9) to rotate synchronously. The gear (9) meshes with the drive gear (8). The drive gear (8) is connected to the two driven gears (10) through a transmission chain. The two ends of the transmission rod (11) are connected to the conical teeth (13) and the driven gears (10). The conical teeth (13) mesh with the conical teeth (14). The conical teeth (14) are fixed to the stud (15).

7. A butterfly valve for preventing valve plate displacement according to claim 6, characterized in that, The two ends of the connecting shaft are connected to the handle (7) and the gear (9), and the connecting shaft is rotatably connected to the transmission housing (2). The driving gear (8), the gear (9) and the driven gear (10) are rotatably connected inside the transmission housing (2).

8. A butterfly valve for preventing valve plate displacement according to claim 1, characterized in that, The end of the stud (15) is rotatably connected to the transmission housing (2).

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