Double valve plate linkage regulated flow control butterfly valve

Abstract

The utility model belongs to butterfly valve technical field especially is a kind of flow control butterfly valve of double valve plate linkage adjustment, including valve pipe, the inside installation of valve pipe has valve plate assembly;Valve plate assembly, including two rotating shafts that are rotatably connected in valve pipe by bearing, the bottom of rotating shaft is all fixed with support disc.The utility model is provided with two groups of support disc that are made of valve plate by being arranged in the inside of valve pipe, even if the sealing ring on one of support disc fails when being damaged by accident, the sealing ring on another support disc still can play effective sealing effect, greatly improve the reliability and security of valve, and when valve is closed, multiple springs on the same support disc can push arc block to move outward, make it more tightly press on the inner surface of sealing ring, to realize automatic compensation sealing gap caused by temperature change, wear or slight deformation of sealing ring, further guarantee the sealing effect of two groups of support disc that are made of valve plate.

Description

Technical Field

[0001] This utility model relates to the field of butterfly valve technology, specifically a flow control butterfly valve with dual valve plate linkage regulation. Background Technology

[0002] Butterfly valves, as a simple and quick-opening flow control device, are widely used in pipeline systems in water conservancy, chemical industry, HVAC, and shipbuilding. Traditional butterfly valves typically use a single valve plate structure, where the valve plate rotates around an axis to change the channel opening and achieve flow control. When the single valve plate is closed, its circumferential edge relies on the compression of the elastic valve seat to achieve sealing. Under high pressure, when the medium contains particles, or when the valve plate undergoes slight deformation due to long-term use, problems such as poor sealing and leakage are prone to occur. Furthermore, once the single sealing valve plate fails, the entire valve loses its sealing function. Therefore, we propose a flow control butterfly valve with dual valve plate linkage regulation to solve the above problems. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this utility model provides a flow control butterfly valve with dual-valve plate linkage regulation, which solves the problems mentioned in the background art.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, this utility model specifically adopts the following technical solution:

[0007] A flow control butterfly valve with dual valve plate linkage regulation includes a valve tube, wherein a valve plate assembly is installed inside the valve tube;

[0008] The valve plate assembly includes two rotating shafts rotatably connected to a valve tube via bearings. Each shaft has a support plate fixed to its bottom end. Circular plates are fixed to the side walls of both support plates, and sealing rings are fixed between corresponding circular plates. Mounting grooves are arranged in a circular array on both support plates, and springs are fixed inside each groove. T-shaped blocks with limiting sliding are arranged in a circular array on each support plate. The other end of each spring is fixedly connected to a corresponding T-shaped block. An arc-shaped block is fixed to one end of each T-shaped block, and the arc-shaped block is in contact with the inner surface of the corresponding sealing ring. A drive mechanism for synchronously rotating the two shafts is installed on the valve tube.

[0009] Furthermore, the drive mechanism includes two connecting plates fixed on the valve pipe. The side walls of the connecting plates are rotatably connected to drive shafts via bearings. The surfaces of the drive shafts are fixed with driving bevel gears, and the surfaces of the rotating shafts are fixed with driven bevel gears. The driven bevel gears are respectively meshed with the corresponding driving bevel gears. A dual-axis motor is fixed on the valve pipe, and one end of each of the two drive shafts is fixedly connected to the output end of the dual-axis motor.

[0010] Furthermore, a protective cover that can be detachably mounted on the valve pipe is provided above the dual-axis motor. Heat dissipation vents are provided on both sides of the protective cover, and filter screens are fixed inside the heat dissipation vents.

[0011] Furthermore, a filter assembly is installed at one end of the valve pipe. The filter assembly includes a filter tube that is fixedly connected to the valve pipe. A filter cylinder is placed inside the filter tube. A limit frame is fixed on the surface of the filter cylinder. A cover plate for limiting the limit frame is detachably installed on the top of the filter tube.

[0012] Furthermore, the filter tube is internally fixed with four guide rails that are adapted to the limiting frame, and the limiting frame is slidably inserted between the four guide rails.

[0013] Furthermore, a conical elastic cover is fixed inside the filter cartridge.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, this utility model provides a flow control butterfly valve with dual valve plate linkage regulation, which has the following beneficial effects:

[0016] This invention features a valve plate composed of two sets of support discs inside the valve pipe. Even if the sealing ring on one support disc fails due to accidental damage, the sealing ring on the other support disc can still provide an effective seal, greatly improving the reliability and safety of the valve. Furthermore, when the valve is closed, multiple springs on the same support disc can push the arc-shaped block outward, pressing it more tightly against the inner surface of the sealing ring. This automatically compensates for sealing gaps caused by temperature changes, wear, or slight deformation of the sealing ring, further ensuring the sealing effect of the valve plate composed of the two sets of support discs. The filter assembly at the front end of the valve can effectively intercept solid particles and impurities in the pipeline medium, reducing scratches and wear on the sealing ring, thereby extending the service life of the butterfly valve. Attached Figure Description

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

[0018] Figure 2 This is a cross-sectional view of the valve pipe structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the support disk structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the filter assembly structure of this utility model;

[0021] Figure 5 This is a schematic diagram of the filter cartridge structure of this utility model;

[0022] Figure 6 This is a schematic diagram of the cover plate structure of this utility model.

[0023] In the diagram: 1. Valve pipe; 2. Valve plate assembly; 21. Rotating shaft; 22. Support plate; 23. Circular plate; 24. Sealing ring; 25. Mounting groove; 26. Spring; 27. T-block; 28. Arc block; 291. Connecting plate; 292. Drive shaft; 293. Driving bevel gear; 29. ​​Drive mechanism; 294. Driven bevel gear; 295. Dual-axis motor; 296. Protective cover; 297. Heat dissipation port; 298. Filter screen; 3. Filter assembly; 31. Filter tube; 32. Filter cylinder; 33. Limiting frame; 34. Cover plate; 35. Guide rail; 36. Conical elastic cover. Detailed Implementation

[0024] 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.

[0025] Example

[0026] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the present invention provides a flow control butterfly valve with dual valve plate linkage adjustment, including a valve tube 1, and a valve plate assembly 2 is installed inside the valve tube 1.

[0027] The valve plate assembly 2 includes two rotating shafts 21 rotatably connected to the valve pipe 1 via bearings. Each rotating shaft 21 has a support plate 22 fixed at its bottom end. Both sides of the two support plates 22 are fixed with circular plates 23. A sealing ring 24 is fixed between the two corresponding circular plates 23. The two support plates 22 are provided with mounting grooves 25 in a circular array. Springs 26 are fixed inside the mounting grooves 25. The springs 26 are made of stainless steel and have good fatigue resistance and long service life. The support plates 22 are provided with T-shaped blocks 27 for limiting sliding in a circular array. The other end of the springs 26 is fixedly connected to the corresponding T-shaped blocks 27. An arc-shaped block 28 is fixed to one end of each T-shaped block 27. The arc-shaped blocks 28 are respectively attached to the inner surface of the corresponding sealing ring 24. A drive mechanism 29 for driving the two rotating shafts 21 to rotate synchronously is installed on the valve pipe 1.

[0028] The working principle and usage process of this utility model are as follows: When in use, starting the drive mechanism 29 can drive the two rotating shafts 21 to rotate. After the two rotating shafts 21 rotate, they can drive the support plate 22 to rotate respectively. After the support plate 22 rotates, it will drive the circular plate 23 and the sealing ring 24 fixed on its surface to rotate. When the two support plates 22 rotate and are perpendicular to the flow channel of the valve pipe 1, the butterfly valve is in the closed state. When the two support plates 22 rotate and are parallel to the flow channel of the valve pipe 1, the butterfly valve is in the open state. By controlling the opening angle of the two support plates 22, the flow rate of the valve pipe 1 can be controlled.

[0029] The elastic compensation sealing structure, composed of spring 26, T-block 27, and arc-shaped block 28, ensures that there is no leakage under any adjustment angle of the double valve plate. The specific functions are as follows: the spring 26 in the support plate 22 always applies an outward elastic force to the T-block 27, pushing the T-block 27 to slide along the inside of the mounting groove 25. The T-block 27 drives the arc-shaped block 28 to fit tightly against the inner surface of the sealing ring 24, so that the sealing ring 24 always has an outward expansion tendency, ensuring its fit with the inner wall of the valve pipe 1. Therefore, the sealing gap caused by temperature changes, wear, or slight deformation of the sealing ring 24 can be compensated by deformation, thereby continuously maintaining the sealing pressure and preventing fluid leakage from the gap between the valve plate and the wall of the valve pipe 1.

[0030] like Figure 2As shown, in some embodiments, the drive mechanism 29 includes two connecting plates 291 fixed on the valve pipe 1. The sidewalls of the connecting plates 291 are rotatably connected to drive shafts 292 via bearings. The surfaces of the drive shafts 292 are fixed with driving bevel gears 293, and the surfaces of the rotating shafts 21 are fixed with driven bevel gears 294. The driven bevel gears 294 mesh with their corresponding driving bevel gears 293. A dual-axis motor 295 is fixed on the valve pipe 1. The dual-axis motor 295 is a servo motor with a self-locking function, and its two outputs rotate in opposite directions, thus ensuring that the two rotating shafts 21 rotate in the same direction when they rotate synchronously. A protective cover 296 is detachably mounted on the valve pipe 1 above the dual-axis motor 295. Heat dissipation vents 297 are provided on both sides of the protective cover 296, and filters 298 are fixed inside the heat dissipation vents 297. The protective cover 296... The 96 shield protects the dual-axis motor 295, the driving bevel gear 293, and the driven bevel gear 294. The heat generated by the dual-axis motor 295 during operation can be dissipated through the heat dissipation vent 297, while the filter screen 298 prevents dust from the outside air from entering the interior of the shield 296 through the heat dissipation vent 297. One end of each of the two drive shafts 292 is fixedly connected to the output end of the dual-axis motor 295. When in use, starting the dual-axis motor 295 will drive the two drive shafts 292 to rotate. After the two drive shafts 292 rotate, they will drive the driving bevel gear 293 fixed on their surfaces to rotate. When the driving bevel gear 293 rotates, it will drive the driven bevel gear 294 that meshes with it to rotate. Since the driven bevel gears 294 are fixed on the surface of the rotating shaft 21, the two rotating shafts 21 can be driven to rotate synchronously when the dual-axis motor 295 is started.

[0031] like Figure 4 , Figure 5 and Figure 6As shown, in some embodiments, a filter assembly 3 is installed at one end of the valve pipe 1. The filter assembly 3 includes a filter pipe 31 that is fixedly connected to the valve pipe 1. A filter cylinder 32 is placed inside the filter pipe 31, and a conical elastic cover 36 is fixed inside the filter cylinder 32. The conical elastic cover 36 utilizes the dynamic balance between fluid pressure and its own elasticity to achieve automatic switching between "no flow obstruction during flow and prevention of leakage when flow stops". A limit frame 33 is fixed on the surface of the filter cylinder 32, and four guide rails 35 that are adapted to the limit frame 33 are fixed inside the filter pipe 31. The limit frame 33 is slidably inserted between the four guide rails 35. The limit frame 33 on the surface of the filter cylinder 32 and the four guide rails 35 inside the filter pipe 31 slide in cooperation, thereby forming a "four-point positioning" structure. This structure can limit the radial displacement of the filter cylinder 32 under fluid impact, ensuring that the filter cylinder 32 is always in the center position of the filter pipe 31, and preventing the filter cylinder 32 from colliding with the filter. The inner wall of the filter tube 31 is rubbed. The top of the filter tube 31 is detachably installed with a cover plate 34 for limiting the position of the limit frame 33. In order to enhance the sealing performance of the cover plate 34, a square sealing gasket that matches its shape is fixed at the bottom of the cover plate 34. When in use, when the fluid flows into the interior of the filter tube 31, the filter cylinder 32 installed inside it can intercept solid particles and impurities in the fluid, allowing only clean fluid to pass through the filter cylinder 32 and finally flow into the downstream valve tube 1. This can prevent impurities in the fluid from causing the valve plate to jam or the sealing ring 24 to wear. When the filter cylinder 32 needs to be removed for cleaning, the cover plate 34 can be separated from the filter tube 31 first, and then the filter cylinder 32 can be slid out from the interior of the filter tube 31 by holding the limit frame 33. During installation, the cleaned filter cylinder 32 is slidably inserted into the interior of the filter tube 31, and then the cover plate 34 is fixed to the filter tube 31 again.

[0032] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the 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 this utility model should be included within the protection scope of this utility model.

Claims

1. A flow control butterfly valve with dual-valve plate linkage regulation, comprising a valve tube (1), characterized in that: A valve plate assembly (2) is installed inside the valve tube (1); The valve plate assembly (2) includes two rotating shafts (21) rotatably connected to the valve tube (1) via bearings. The bottom end of each rotating shaft (21) is fixed with a support plate (22). The two side walls of the two support plates (22) are fixed with circular plates (23). A sealing ring (24) is fixed between the two corresponding circular plates (23). The two support plates (22) are provided with mounting grooves (25) in an annular array. A spring (26) is fixed inside the mounting groove (25). The support plates (22) are provided with T-shaped blocks (27) for limiting sliding in an annular array. The other end of the spring (26) is fixedly connected to the corresponding T-shaped block (27). One end of the T-shaped block (27) is fixed with an arc-shaped block (28). The arc-shaped block (28) is respectively attached to the inner surface of the corresponding sealing ring (24). The valve tube (1) is equipped with a drive mechanism (29) for driving the two rotating shafts (21) to rotate synchronously.

2. The flow control butterfly valve with dual valve plate linkage regulation according to claim 1, characterized in that: The drive mechanism (29) includes two connecting plates (291) fixed on the valve pipe (1). The side walls of the connecting plates (291) are rotatably connected to drive shafts (292) via bearings. The surfaces of the drive shafts (292) are fixed with active bevel gears (293), and the surfaces of the rotating shafts (21) are fixed with driven bevel gears (294). The driven bevel gears (294) are respectively meshed with the corresponding active bevel gears (293). A dual-axis motor (295) is fixed on the valve pipe (1), and one end of each of the two drive shafts (292) is fixedly connected to the output end of the dual-axis motor (295).

3. The flow control butterfly valve with dual valve plate linkage regulation according to claim 2, characterized in that: The dual-axis motor (295) is provided with a protective cover (296) that can be detachably installed on the valve pipe (1). The protective cover (296) has heat dissipation vents (297) on both sides. The heat dissipation vents (297) are all fixed with filter screens (298).

4. The flow control butterfly valve with dual-valve plate linkage regulation according to claim 1, characterized in that: A filter assembly (3) is installed at one end of the valve pipe (1). The filter assembly (3) includes a filter pipe (31) that is fixed in communication with the valve pipe (1). A filter cylinder (32) is placed inside the filter pipe (31). A limit frame (33) is fixed on the surface of the filter cylinder (32). A cover plate (34) for limiting the limit frame (33) is detachably installed on the top of the filter pipe (31).

5. The flow control butterfly valve with dual valve plate linkage regulation according to claim 4, characterized in that: The filter tube (31) has four guide rails (35) that are adapted to the limiting frame (33) inside, and the limiting frame (33) is slidably inserted between the four guide rails (35).

6. The flow control butterfly valve with dual valve plate linkage regulation according to claim 4, characterized in that: The filter cartridge (32) has a conical elastic cover (36) fixed inside.

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