Eccentric butterfly valve

Abstract

The utility model discloses an eccentric butterfly valve, which belongs to the technical field of regulating valves and comprises a butterfly valve body, the butterfly valve body comprises a valve body, a rotating seat is mounted at the top of the valve body, a transmission shaft is rotatably mounted in the center of the rotating seat, and a hand wheel is fixedly mounted at the top of the transmission shaft. A limiting groove is formed in the periphery of the top of the rotating seat, and a connecting ring is rotationally mounted in the limiting groove; the device further comprises a protection assembly. The multiple sets of pin rods are arranged on the periphery of the transmission shaft, the structure is simple, convenience and practicability are achieved, the transmission shaft can be protected, the transmission shaft is prevented from being directly extruded or collided, and the service life of the device is prolonged; the structural strength of connection between the hand wheel and the rotating seat can be improved, the probability of bending deformation of the transmission shaft can be reduced when the hand wheel is extruded or collided, and the service life of the device is further prolonged.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically an eccentric butterfly valve. Background Technology

[0002] A butterfly valve, also known as a flap valve, is a simple regulating valve used for on / off control of low-pressure pipeline media. It refers to a valve where the closing element is a disc that rotates around the valve shaft to open and close. Butterfly valves can control the flow of various types of fluids, including air, water, steam, various corrosive media, mud, oil, liquid metals, and radioactive media. In pipelines, they primarily function as shut-off and throttling devices. The opening and closing element of a butterfly valve is a disc-shaped disc that rotates around its own axis within the valve body to achieve opening, closing, or regulation. An eccentric butterfly valve is a type of butterfly valve where the valve stem axis is offset from the center of the disc, so that the upper and lower ends of the disc are no longer the axis of rotation, thus dispersing and reducing excessive pressure between the upper and lower ends of the disc and the valve seat.

[0003] A search revealed that Chinese Patent Publication No. CN219493078U discloses an eccentric butterfly valve, relating to the field of butterfly valve technology. The valve includes: a valve body with a rotating shaft; a valve plate fixedly connected to the rotating shaft; two reinforcing ribs on the rotating shaft; a handwheel fixedly connected to the upper part of the rotating shaft via an external shaft; a socket fixedly connected to the lower part of the rotating shaft; a base fixedly connected to the lower part of the valve body; a protective shell engaged with the base; slots evenly distributed on the circumference of the socket; and a placement seat fixedly connected to the circumference of the valve body. An emergency lever is installed inside the placement seat. Through the socket, plug, emergency lever, and limit block, when the external shaft breaks and cannot be controlled by the handwheel, the emergency lever can be inserted into the slot of the socket for emergency control, thus preventing continuous water flow, saving water resources, and being highly suitable for emergency use.

[0004] However, this device also has the following drawbacks:

[0005] When the handwheel or drive shaft of an eccentric butterfly valve is subjected to external force or collision, the rotating shaft will bend and deform. The deformation of the rotating shaft will increase wear, reduce the service life of the eccentric butterfly valve, and may even directly render the eccentric butterfly valve unusable. This device does not solve this problem. Utility Model Content

[0006] The purpose of this utility model is to provide an eccentric butterfly valve. By setting multiple sets of pins around the drive shaft, the drive shaft can be protected, preventing it from being directly squeezed or impacted, thus improving the service life of the device. Furthermore, by setting the first pin hole and the second pin hole and other structures in conjunction with the pins, the structural strength of the connection between the handwheel and the rotating seat can be improved. When the handwheel is squeezed or impacted, the probability of the drive shaft bending and deforming can be reduced, further improving the service life of the device, thereby solving the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] An eccentric butterfly valve includes a butterfly valve body, the butterfly valve body including a valve body, a rotating seat mounted on the top of the valve body, a drive shaft rotatably mounted at the center of the rotating seat, a handwheel fixedly mounted on the top of the drive shaft, and a limit groove formed around the top of the rotating seat, with a connecting ring rotatably mounted in the limit groove.

[0009] It also includes a protective component, which includes a movable plate. Multiple sets of pins are symmetrically arranged at the bottom center of the movable plate. The pins are located on the outside of the drive shaft. The surface of the handwheel has a first pin hole that cooperates with the pins. The surface of the connecting ring has a second pin hole that cooperates with the pins.

[0010] It also includes a clamping assembly, which includes a fixing rod with a spring slidably sleeved on its surface, the bottom of the spring abutting against the top surface of the movable plate.

[0011] Preferably, the movable plate is positioned above the handwheel, and the bottom of the movable plate is fixedly connected to the top of the pin.

[0012] Preferably, the movable plate is slidably engaged with the fixed rod, and the bottom thread of the fixed rod is threaded onto the center of the top surface of the handwheel.

[0013] Preferably, the top of the spring abuts against the limiting plate, and the limiting plate is fixedly installed on the top surface of the fixing rod.

[0014] Preferably, a locking screw is threaded on one side of the connecting ring, and one end of the locking screw abuts against the inner wall of the limiting groove.

[0015] Preferably, flanges are provided at both ends of the valve body, and the flanges are fixedly connected to the valve body.

[0016] Preferably, the bottom of the drive shaft is fixedly connected to the valve plate, and the valve plate is rotatably installed inside the valve body.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] This utility model features multiple sets of pins around the drive shaft, resulting in a simple, convenient, and practical structure. These pins protect the drive shaft from direct pressure or impact, extending its service life. Furthermore, the use of first and second pin holes in conjunction with the pins enhances the structural strength of the connection between the handwheel and the rotating seat. This reduces the probability of the drive shaft bending or deforming when the handwheel is subjected to pressure or impact, further improving the device's lifespan. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of this utility model;

[0020] Figure 2 This is a schematic diagram of the structure in the upward-moving state of the protective component;

[0021] Figure 3 This is a schematic diagram of the handwheel structure;

[0022] Figure 4 This is a schematic diagram of the protective component structure;

[0023] Figure 5 This is a schematic diagram of the explosion separation structure of the limiting groove and the connecting ring.

[0024] In the diagram: 1. Valve body; 2. Rotating seat; 3. Drive shaft; 4. Handwheel; 5. Limiting groove; 6. Connecting ring; 7. Movable plate; 8. Pin rod; 9. First pin hole; 10. Second pin hole; 11. Fixing rod; 12. Spring; 13. Limiting plate; 14. Tightening screw; 15. Flange; 16. Valve plate. Detailed Implementation

[0025] 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.

[0026] Please see Figures 1-5 This utility model provides a technical solution:

[0027] An eccentric butterfly valve includes a butterfly valve body, which includes a valve body 1. A rotating seat 2 is mounted on the top of the valve body 1. A drive shaft 3 is rotatably mounted at the center of the rotating seat 2. A handwheel 4 is fixedly mounted on the top of the drive shaft 3. Flanges 15 are provided at both ends of the valve body 1 and are fixedly connected to the valve body 1. The bottom of the drive shaft 3 is fixedly connected to a valve plate 16, which is rotatably mounted inside the valve body 1.

[0028] By setting a handwheel 4, the operator can easily rotate the drive shaft 3, which in turn drives the valve plate 16 to rotate inside the valve body 1, thereby controlling the opening and closing of the butterfly valve body. Furthermore, by setting flanges 15 on both sides of the valve body 1, the operator can easily connect this device to external pipelines.

[0029] It also includes a protective component, which includes a movable plate 7. Multiple sets of pins 8 are symmetrically arranged at the bottom center of the movable plate 7. The pins 8 are located on the outside of the drive shaft 3. The surface of the handwheel 4 has a first pin hole 9 that cooperates with the pins 8. The top of the rotating seat 2 has a limit groove 5 around its perimeter. A connecting ring 6 is rotatably installed in the limit groove 5. The surface of the connecting ring 6 has a second pin hole 10 that cooperates with the pins 8. The movable plate 7 is located above the handwheel 4. The bottom of the movable plate 7 is fixedly connected to the top of the pins 8. The movable plate 7 is slidably engaged with the fixed rod 11. The bottom of the fixed rod 11 is threadedly installed at the center of the top surface of the handwheel 4. A clamping screw 14 is threadedly installed on one side of the connecting ring 6. One end of the clamping screw 14 abuts against the inner wall of the limit groove 5.

[0030] By setting multiple sets of pins 8 around the drive shaft 3, the drive shaft 3 can be protected, preventing it from being directly squeezed or impacted, thus improving the service life of the rotating seat 2. Furthermore, by using the first pin hole 9 and the second pin hole 10 in conjunction with the pins 8, the structural strength of the connection between the handwheel 4 and the rotating seat 2 can be improved. When the handwheel 4 is squeezed or impacted, the probability of the drive shaft 3 bending and deforming can be reduced, further improving the service life of the device. Finally, by setting the locking screw 14, the position of the connecting ring 6 can be fixed, thereby fixing the position of the handwheel 4 through the pins 8. This allows the operator to lock the handwheel 4 in place after use, preventing accidental rotation.

[0031] It also includes a clamping assembly, which includes a fixing rod 11. A spring 12 is slidably sleeved on the surface of the fixing rod 11. The bottom of the spring 12 abuts against the top surface of the movable plate 7, and the top of the spring 12 abuts against the limiting plate 13. The limiting plate 13 is fixedly installed on the top surface of the fixing rod 11.

[0032] By setting spring 12, the movable plate 7 can be pushed downward by the elastic force of spring 12, thereby preventing the pin 8 from disengaging from the first pin hole 9 and the second pin hole 10.

[0033] In practical use, the device is installed in the designated position. When the handwheel 4 needs to be used, the handles on both sides of the movable plate 7 are used to pull the movable plate 7 upward to compress the spring 12, causing the pin 8 to disengage from the first pin hole 9 and the second pin hole 10. Then, the movable plate 7 is rotated to offset the pin 8 from the first pin hole 9, thereby reducing the resistance for the operator to rotate the handwheel 4. After use, the movable plate 7 is rotated to align the pin 8 with the first pin hole 9, and the connecting ring 6 is rotated to align the second pin hole 10 with the pin 8. Then, the movable plate 7 is released, and the compressed spring 12 pushes the movable plate 7 and the pin 8 downward, causing the pin 8 to insert into the first pin hole 9 and the second pin hole 10, protecting the drive shaft 3 and improving the structural strength of the connection between the handwheel 4 and the rotating seat 2. The operator can then tighten the locking screw 14 to prevent the handwheel 4 from rotating accidentally.

[0034] 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. An eccentric butterfly valve, characterized in that: The valve body includes a valve body (1), a rotating seat (2) is mounted on the top of the valve body (1), a drive shaft (3) is rotatably mounted on the center of the rotating seat (2), a handwheel (4) is fixedly mounted on the top of the drive shaft (3), and a limit groove (5) is opened around the top of the rotating seat (2), and a connecting ring (6) is rotatably mounted in the limit groove (5). It also includes a protective component, which includes a movable plate (7). Multiple sets of pins (8) are symmetrically arranged at the bottom center of the movable plate (7). The pins (8) are located on the outside of the transmission shaft (3). The surface of the handwheel (4) is provided with a first pin hole (9) that cooperates with the pins (8). The surface of the connecting ring (6) is provided with a second pin hole (10) that cooperates with the pins (8). It also includes a clamping assembly, which includes a fixing rod (11) with a spring (12) slidably sleeved on the surface of the fixing rod (11) and the bottom of the spring (12) abutting against the top surface of the movable plate (7).

2. The eccentric butterfly valve according to claim 1, characterized in that: The movable plate (7) is positioned above the handwheel (4), and the bottom of the movable plate (7) is fixedly connected to the top of the pin (8).

3. An eccentric butterfly valve according to claim 1, characterized in that: The movable plate (7) is slidably engaged with the fixed rod (11), and the bottom thread of the fixed rod (11) is threaded onto the center of the top surface of the handwheel (4).

4. An eccentric butterfly valve according to claim 1, characterized in that: The top of the spring (12) abuts against the limiting plate (13), which is fixedly installed on the top surface of the fixing rod (11).

5. An eccentric butterfly valve according to claim 1, characterized in that: A locking screw (14) is threaded on one side of the connecting ring (6), and one end of the locking screw (14) abuts against the inner wall of the limiting groove (5).

6. An eccentric butterfly valve according to claim 1, characterized in that: The valve body (1) is provided with flanges (15) at both ends, and the flanges (15) are fixedly connected to the valve body (1).

7. An eccentric butterfly valve according to claim 6, characterized in that: The bottom of the drive shaft (3) is fixedly connected to the valve plate (16), and the valve plate (16) is rotatably installed inside the valve body (1).

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