Butterfly valve opening mechanism

Abstract

The utility model discloses a butterfly valve opening mechanism contains pneumatic actuator, butterfly valve spare and gas filter drying spare. Pneumatic actuator is equipped with cylinder, and there are two pistons and the rack connected with it in the cylinder, and there is reset spring on the cylinder cover. When working, gas pushes the piston, drives the rack, pinion column and valve rod to rotate, realizes butterfly valve opening and closing, and the reset spring can reset the piston. Butterfly valve spare includes valve body, valve rod and butterfly piece, and the valve rod is rotatably connected with the cylinder and valve body, and there is the valve seat of adapting butterfly piece in the valve body. The gas filter drying spare has air pressure regulating valve, end cover, drying tank and filter tank, and the outside air is filtered through the air filter element of filter tank, dried by drying tank, and then enters the cylinder after being adjusted by air pressure regulating valve. In addition, the cylinder is equipped with air pressure feedback ware, can real -time feedback air pressure situation, and the performance and stability of butterfly valve opening mechanism are improved as a whole.

Description

Technical Field

[0001] This utility model relates to the field of pneumatic butterfly valve actuator technology, specifically to a butterfly valve opening mechanism. Background Technology

[0002] Butterfly valves are widely used as a key flow regulation and shut-off device in industrial production and various fluid control scenarios. Traditional butterfly valve opening mechanisms mostly employ manual or simple electric actuation. Manual actuation relies on manual operation, which is not only labor-intensive but also poses significant safety hazards in some large equipment or high-risk environments, and makes it difficult to achieve rapid and precise control.

[0003] While simple electrically driven butterfly valve opening mechanisms achieve a degree of automation, they lack effective handling of the driving gas. In actual working environments, air often contains moisture, dust, and other impurities. These impurities, once introduced into the pneumatic system, accelerate the wear of pneumatic components, reduce their service life, and may also cause the pneumatic actuator to become sluggish or unstable, affecting the opening and closing accuracy of the butterfly valve and consequently impacting the normal operation of the entire fluid control system. Furthermore, traditional structures have shortcomings in reset and pneumatic pressure feedback, making it difficult to meet the high reliability and stability requirements of butterfly valve opening mechanisms under complex operating conditions. Therefore, based on the aforementioned deficiencies, a new butterfly valve opening mechanism solution is proposed. Utility Model Content

[0004] The purpose of this utility model is to provide a technical solution for a butterfly valve opening mechanism to overcome the shortcomings mentioned in the background art. To address the drawbacks and defects described in the background art, this technical solution includes the following:

[0005] It includes a pneumatic actuator, a butterfly valve is provided at the bottom of the pneumatic actuator, and a gas filter and dryer is provided on the front side wall of the pneumatic actuator;

[0006] The pneumatic actuator includes a cylinder, two pistons movably disposed on the left and right sides of the cylinder cavity, and two racks movably disposed on the side of the pistons that are close to each other and arranged in a rotationally symmetrical manner. Cylinder covers are fixed on both the left and right end faces of the cylinder, and 6-10 return springs are fixed on the side of the cylinder covers that are close to each other.

[0007] The butterfly valve includes a valve body fixed to the bottom surface of the cylinder and a valve stem that penetrates the valve body. The bottom section of the valve stem is fixed with a butterfly plate, and the top section of the valve stem is located inside the cylinder and is fixed with a gear column that meshes with a rack.

[0008] The gas filtration and drying component includes a pressure regulating valve, two end caps fixed to the front and rear ports of the pressure regulating valve, a drying tank fixed to the bottom of the rear end cap, and a filter tank fixed to the bottom of the front end cap. Drying particles are placed in the inner cavity of the drying tank, and an air filter element is fixedly connected to the inner cavity of the filter tank.

[0009] As a preferred embodiment of this utility model: the front end face of the cylinder is provided with two through holes, and a pressure feedback device and a gas delivery pipe are respectively installed inside the through holes.

[0010] As a preferred embodiment of this utility model: the piston and rack are both arranged in a rotationally symmetrical manner with respect to the axis of the cylinder, and the ends of the return springs that are close to each other are fixedly connected to the opposite sides of the pistons.

[0011] As a preferred embodiment of this utility model: the top end of the valve stem is rotatably connected to the top side wall of the inner cavity of the cylinder, and the bottom end of the valve stem is rotatably connected to the bottom side wall of the inner cavity of the valve body.

[0012] As a preferred embodiment of this utility model, a valve seat adapted to the butterfly disc is fixed in the inner cavity of the valve body.

[0013] As a preferred embodiment of this utility model: the interior of the rear end cap is provided with L-shaped through holes arranged in a mirror image symmetrical arrangement. An L-shaped gas tube is fixed in the front L-shaped through hole, and the bottom end of the L-shaped gas tube extends into the bottom of the drying tank cavity and is buried in the dried particles. The rear L-shaped through hole is used to transmit the dried gas to the gas delivery pipe.

[0014] As a preferred embodiment of this utility model: the air outlet of the air pressure regulating valve is connected to the air inlet of the rear end cover for supplying air into the L-shaped air pipe, and the air inlet of the air pressure regulating valve is connected to the air outlet of the front end cover.

[0015] As a preferred embodiment of this utility model: the bottom surface of the filter canister is provided with an air inlet, and the bottom port of the front end cap is connected to the top air outlet port of the filter canister, for delivering the air filtered by the air filter element to the inside of the air pressure regulating valve.

[0016] The technical effects and advantages provided by this utility model in the above technical solution are as follows:

[0017] The air filter element in the gas filtration and drying unit filters out impurities from the outside air, while the drying particles in the drying tank remove moisture from the air. After being regulated by the air pressure regulating valve, clean and dry gas is provided to the cylinder, ensuring stable operation of the pneumatic actuator. Inside the cylinder, the piston, rack, gear column, and valve stem work together to convert gas pressure into mechanical rotational force, enabling precise opening and closing of the butterfly valve. The return spring resets the piston when the air pressure changes, driving all components back to their original positions, ensuring that the butterfly valve returns to its initial state in a timely manner. The air pressure feedback device provides real-time feedback on the air pressure inside the cylinder, facilitating monitoring and adjustment. The overall structure is compact and reasonable, with all components working in concert, improving the reliability, stability, and control accuracy of the butterfly valve opening mechanism. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of a pneumatic butterfly valve.

[0020] Figure 2 This is a schematic diagram of the pneumatic actuator and valve body;

[0021] Figure 3 This is a schematic diagram of a gas filter drying element.

[0022] Explanation of reference numerals in the attached figures:

[0023] 1. Pneumatic actuator; 11. Cylinder; 12. Gear column; 13. Piston; 14. Pressure feedback device; 15. Rack; 16. Return spring; 17. Cylinder head; 2. Butterfly valve components; 21. Valve body; 22. Butterfly plate; 23. Valve seat; 24. Valve stem; 3. Gas filter and dryer components; 31. Pressure regulating valve; 32. End cap; 33. Gas delivery pipe; 34. L-shaped air pipe; 35. Dryer; 36. Air filter element; 37. Filter canister. Detailed Implementation

[0024] To provide a clearer explanation and illustration of the technical solution and implementation of this utility model, several preferred specific embodiments for implementing the technical solution of this utility model are described below. The following description is merely exemplary and not intended to limit the scope, application, or use of this disclosure. It should be understood that in all these drawings, the same or similar reference numerals indicate the same or similar parts and features. The various drawings only schematically illustrate the concept and principle of the embodiments of this disclosure and do not necessarily show the specific dimensions and proportions of the various embodiments of this disclosure. The technical solution of this utility model will be clearly and completely described below in conjunction with embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model.

[0025] Example 1: The butterfly valve opening mechanism includes a pneumatic actuator 1, a butterfly valve component 2 at the bottom of the pneumatic actuator 1, and a gas filter and dryer component 3 on the front side wall. Two pistons 13 are movably mounted on the left and right sides of the cylinder 11 of the pneumatic actuator 1. Two rotationally symmetrical racks 15 are movably mounted on the side of the pistons 13 that are close to each other. Cylinder covers 17 are fixed to the left and right end faces of the cylinder 11. Six return springs 16 are fixed to the side of the cylinder covers 17 that are close to each other. The ends of the return springs 16 that are close to each other are fixedly connected to the side of the pistons 13 that are far apart from each other. Two through holes are provided on the front end face of the cylinder 11, for mounting a pressure feedback device 14 and a gas delivery pipe 33, respectively. The valve body 21 of the butterfly valve component 2 is fixed to the bottom surface of the cylinder 11. The valve stem 24 passes through the valve body 21. The bottom section of the valve stem 24 is fixed with the butterfly plate 22, and the top section is located inside the cylinder 11 and fixed with the gear column 12 that meshes with the rack 15. The top end of the valve stem 24 is rotatably connected to the top side wall of the inner cavity of the cylinder 11, and the bottom end is rotatably connected to the bottom side wall of the inner cavity of the valve body 21. The valve seat 23 that is adapted to the butterfly plate 22 is fixed in the inner cavity of the valve body 21. The gas filter drying component 3 has two end caps 32 fixed to the front and rear ports of the pressure regulating valve 31. The bottom of the rear end cap 32 is fixed to the drying tank 35, and the bottom of the front end cap 32 is fixed to the filter tank 37. Drying particles are placed inside the drying tank 35, and the air filter element 36 is fixedly connected to the inner cavity of the filter tank 37. The rear end cap 32 has an L-shaped through hole that is mirror-symmetrical from front to back. The front L-shaped through hole is fixed to an L-shaped air pipe 34. The bottom end of the L-shaped air pipe 34 extends into the bottom of the inner cavity of the drying tank 35 and is buried in the drying particles. The rear L-shaped through hole is used to transmit the dried gas to the gas delivery pipe 33. The outlet port of the pressure regulating valve 31 is connected to the inlet port of the rear end cap 32, and the inlet port is connected to the outlet port of the front end cap 32. An air inlet is provided on the bottom surface of the filter tank 37, and the bottom port of the front end cap 32 is connected to the top outlet port of the filter tank 37. In use, gas enters from the bottom air inlet of the filter canister 37, is filtered by the air filter element 36, and then enters the air pressure regulating valve 31. After passing through the L-shaped air pipe 34, it enters the drying canister 35 for drying. After drying, the gas enters the cylinder 11 through the gas delivery pipe 33, which pushes the piston 13 to move. The piston 13 drives the rack 15 to move, the rack 15 drives the gear column 12 to rotate, the gear column 12 drives the valve stem 24 to rotate, and the valve stem 24 drives the butterfly plate 22 to rotate, thereby opening or closing the butterfly valve. When the air pressure in the cylinder 11 changes, the air pressure feedback device 14 can provide feedback on the air pressure information.

[0026] Example 2: In this butterfly valve opening mechanism, two pistons 13 are movably arranged on the left and right sides of the inner cavity of the cylinder 11 of the pneumatic actuator 1. Two rotationally symmetrical racks 15 are movably arranged on the side of the pistons 13 that are close to each other. Cylinder covers 17 are fixed on the left and right end faces of the cylinder 11. Eight return springs 16 are fixed on the side of the cylinder covers 17 that are close to each other. The ends of the return springs 16 that are close to each other are fixedly connected to the side of the pistons 13 that are far away from each other. Two through holes are provided on the front end face of the cylinder 11, and a pneumatic pressure feedback device 14 and a gas delivery pipe 33 are installed respectively. The valve body 21 of the butterfly valve component 2 is fixed to the bottom surface of the cylinder 11. The valve stem 24 passes through the valve body 21. The bottom section of the valve stem 24 is fixed with a butterfly plate 22, and the top section is located inside the cylinder 11 and is fixed with a gear column 12 that meshes with the racks 15. The top end of the valve stem 24 is rotatably connected to the top side wall of the inner cavity of the cylinder 11, and the bottom end is rotatably connected to the bottom side wall of the inner cavity of the valve body 21. A valve seat 23 that is adapted to the butterfly plate 22 is fixed in the inner cavity of the valve body 21. The gas filter drying component 3 has two end caps 32 fixed to the front and rear ports of the pressure regulating valve 31. The bottom of the rear end cap 32 is fixed to the drying tank 35, and the bottom of the front end cap 32 is fixed to the filter tank 37. Drying particles are placed inside the drying tank 35, and the air filter element 36 is fixedly connected to the inner cavity of the filter tank 37. The rear end cap 32 has an L-shaped through hole that is mirror-symmetrical from front to back. The front L-shaped through hole is fixed to an L-shaped air pipe 34. The bottom end of the L-shaped air pipe 34 extends into the bottom of the inner cavity of the drying tank 35 and is buried in the drying particles. The rear L-shaped through hole is used to transmit the dried gas to the gas delivery pipe 33. The outlet port of the pressure regulating valve 31 is connected to the inlet port of the rear end cap 32, and the inlet port is connected to the outlet port of the front end cap 32. An air inlet is provided on the bottom surface of the filter tank 37, and the bottom port of the front end cap 32 is connected to the top outlet port of the filter tank 37. During operation, gas enters from the bottom air inlet of the filter tank 37, passes through the air filter element 36 to filter impurities, and then enters the air pressure regulating valve 31. After the air pressure is regulated by the air pressure regulating valve 31, the gas enters the drying tank 35 through the L-shaped air pipe 34 to remove moisture. After drying, the gas enters the cylinder 11 through the gas delivery pipe 33, pushing the piston 13 to move. The piston 13 drives the valve stem 24 to rotate through the rack 15 and the gear column 12. The valve stem 24 drives the butterfly plate 22 to rotate, realizing the butterfly valve function. The air pressure feedback device 14 can monitor the air pressure in the cylinder 11 in real time.

[0027] Example 3: In the pneumatic actuator 1 of this butterfly valve opening mechanism, two pistons 13 are movably arranged on the left and right sides of the inner cavity of the cylinder 11. Two rotationally symmetrical racks 15 are movably arranged on the side of the pistons 13 that are close to each other. Cylinder covers 17 are fixed to the left and right end faces of the cylinder 11. Ten return springs 16 are fixed on the side of the cylinder covers 17 that are close to each other. The ends of the return springs 16 that are close to each other are fixedly connected to the side of the pistons 13 that are far apart from each other. Two through holes are provided on the front end face of the cylinder 11, and a pneumatic pressure feedback device 14 and a gas delivery pipe 33 are respectively installed thereon. The valve body 21 of the butterfly valve component 2 is fixed to the bottom surface of the cylinder 11. The valve stem 24 passes through the valve body 21. The bottom section of the valve stem 24 is fixed with the butterfly plate 22, and the top section is located inside the cylinder 11 and fixed with the gear column 12 that meshes with the rack 15. The top end of the valve stem 24 is rotatably connected to the top side wall of the inner cavity of the cylinder 11, and the bottom end is rotatably connected to the bottom side wall of the inner cavity of the valve body 21. The valve seat 23 that is adapted to the butterfly plate 22 is fixed in the inner cavity of the valve body 21. The gas filter drying component 3 has two end caps 32 fixed to the front and rear ports of the pressure regulating valve 31. The bottom of the rear end cap 32 is fixed to the drying tank 35, and the bottom of the front end cap 32 is fixed to the filter tank 37. Drying particles are placed inside the drying tank 35, and the air filter element 36 is fixedly connected to the inner cavity of the filter tank 37. The rear end cap 32 has an L-shaped through hole that is mirror-symmetrical from front to back. The front L-shaped through hole is fixed to an L-shaped air pipe 34. The bottom end of the L-shaped air pipe 34 extends into the bottom of the inner cavity of the drying tank 35 and is buried in the drying particles. The rear L-shaped through hole is used to transmit the dried gas to the gas delivery pipe 33. The outlet port of the pressure regulating valve 31 is connected to the inlet port of the rear end cap 32, and the inlet port is connected to the outlet port of the front end cap 32. An air inlet is provided on the bottom surface of the filter tank 37, and the bottom port of the front end cap 32 is connected to the top outlet port of the filter tank 37. When the butterfly valve needs to be operated, gas enters from the bottom air inlet of the filter tank 37, and after being filtered by the air filter element 36 to remove dust and other particles, it enters the air pressure regulating valve 31. The air pressure regulating valve 31 adjusts the air pressure according to the requirements. The adjusted gas enters the drying tank 35 through the L-shaped air pipe 34 for drying. After drying, the gas enters the cylinder 11 through the gas delivery pipe 33, pushing the piston 13 to move. The piston 13 drives the rack 15 to move, the rack 15 drives the gear column 12 to rotate, the gear column 12 drives the valve stem 24 to rotate, and the valve stem 24 drives the butterfly plate 22 to rotate, realizing the opening or closing action of the butterfly valve. The air pressure feedback device 14 can provide feedback on the air pressure information in the cylinder 11 for adjustment.

[0028] Based on the above-described preferred technical solution, the workflow of this technical solution is explained as follows:

[0029] When the butterfly valve opening mechanism is working, the pneumatic actuator 1 is the core driving component. Its cylinder 11 has two through holes on its front end face, where a pressure feedback device 14 and a gas delivery pipe 33 are respectively installed. The outlet port of the pressure regulating valve 31 of the gas filter drying component 3 is connected to the inlet port of the rear end cover 32, and the inlet port is connected to the outlet port of the front end cover 32. The bottom port of the front end cover 32 is connected to the top outlet port of the filter canister 37. The bottom surface of the filter canister 37 has an air inlet, allowing outside air to enter from the bottom of the filter canister 37. Air enters through the intake nozzle, is filtered by the air filter element 36 fixed in the inner cavity, and then enters the air pressure regulating valve 31. The air pressure regulating valve 31 regulates the air pressure, and then the air is delivered through the L-shaped air pipe 34 fixed in the L-shaped through hole on the front side inside the rear end cover 32. The bottom end of the L-shaped air pipe 34 extends into the bottom of the inner cavity of the drying tank 35 and is buried in the drying particles. After the air is dried by the drying particles, it is transmitted to the gas delivery pipe 33 through the L-shaped through hole on the rear side inside the rear end cover 32, and then enters the inner cavity of the cylinder 11.

[0030] The gas entering the inner cavity of cylinder 11 pushes two pistons 13, which are arranged on the left and right sides of the inner cavity of cylinder 11. Both pistons 13 and racks 15 are rotationally symmetrical about the axis of cylinder 11. The movement of pistons 13 causes the two racks 15, which are rotationally symmetrical about the side of pistons 13 that are close to each other, to move. The racks 15 mesh with a gear column 12 fixed to the top section of valve stem 24 and located inside cylinder 11. The movement of racks 15 causes the gear column 12 to rotate, which in turn causes valve stem 24 to rotate. The top end of valve stem 24 is rotatably connected to the top side wall of the inner cavity of cylinder 11, and the bottom end is rotatably connected to the bottom side wall of the inner cavity of valve body 21 fixed to the bottom surface of cylinder 11. The valve stem 24 rotates... The rotation of the valve stem 24 drives the butterfly plate 22, which is fixed at the bottom of the valve stem 24, to rotate. The valve seat 23, which is adapted to the butterfly plate 22, is fixed in the inner cavity of the valve body 21. The rotation of the butterfly plate 22 realizes the opening or closing action of the butterfly valve. When the gas pressure in the inner cavity of the cylinder 11 changes or needs to be reset, 6-10 return springs 16, which are fixed on the cylinder cover 17, which is fixed on both the left and right end faces of the cylinder 11, are fixed on the side close to each other. The ends of the return springs 16 are fixedly connected to the side of the piston 13 that is far away from each other. The return springs 16 play a role in resetting the piston 13, which in turn drives the rack 15, the gear column 12, the valve stem 24 and the butterfly plate 22 to reset. At the same time, the air pressure feedback device 14 can provide real-time feedback on the air pressure in the inner cavity of the cylinder 11.

[0031] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A butterfly valve opening mechanism, comprising a pneumatic actuator (1), characterized in that: A butterfly valve (2) is provided at the bottom of the pneumatic actuator (1), and a gas filter and dryer (3) is provided on the front side wall of the pneumatic actuator (1). The pneumatic actuator (1) includes a cylinder (11), two pistons (13) movably disposed on the left and right sides of the inner cavity of the cylinder (11), and two racks (15) movably disposed on the side of the pistons (13) that are close to each other in a rotationally symmetrical manner. The cylinder (11) is fixed with cylinder heads (17) on both the left and right end faces. 6-10 return springs (16) are fixed on the side of the cylinder heads (17) that are close to each other. The butterfly valve (2) includes a valve body (21) fixed to the bottom surface of the cylinder (11) and a valve stem (24) penetrating the valve body (21). The bottom section of the valve stem (24) is fixed with a butterfly plate (22), and the top section of the valve stem (24) is located inside the cylinder (11) and is fixed with a gear column (12) that meshes with the rack (15). The gas filter drying component (3) includes a pressure regulating valve (31), two end caps (32) fixed on the front and rear ports of the pressure regulating valve (31), a drying tank (35) fixed at the bottom of the rear end cap (32), and a filter tank (37) fixed at the bottom of the front end cap (32). Drying particles are placed in the inner cavity of the drying tank (35), and an air filter element (36) is fixedly connected in the inner cavity of the filter tank (37).

2. The butterfly valve opening mechanism according to claim 1, characterized in that: The front end face of the cylinder (11) is provided with two through holes, and a pressure feedback device (14) and a gas delivery pipe (33) are respectively installed inside the through holes.

3. The butterfly valve opening mechanism according to claim 1, characterized in that: The piston (13) and rack (15) are both arranged in a rotationally symmetrical manner with respect to the axis of cylinder (11). The ends of the return springs (16) that are close to each other are fixedly connected to the sides of the pistons (13) that are far apart from each other.

4. The butterfly valve opening mechanism according to claim 1, characterized in that: The top end of the valve stem (24) is rotatably connected to the top side wall of the inner cavity of the cylinder (11), and the bottom end of the valve stem (24) is rotatably connected to the bottom side wall of the inner cavity of the valve body (21).

5. The butterfly valve opening mechanism according to claim 1, characterized in that: A valve seat (23) adapted to the butterfly plate (22) is fixed in the inner cavity of the valve body (21).

6. The butterfly valve opening mechanism according to claim 1, characterized in that: The rear end cap (32) has an L-shaped through hole arranged in a mirror image symmetrical arrangement. An L-shaped air tube (34) is fixed in the front L-shaped through hole. The bottom end of the L-shaped air tube (34) extends into the bottom of the drying tank (35) and is buried in the dried particles. The rear L-shaped through hole is used to transmit the dried gas to the gas delivery pipe (33).

7. The butterfly valve opening mechanism according to claim 1, characterized in that: The outlet port of the pressure regulating valve (31) is connected to the inlet port of the rear end cap (32) for supplying air into the L-shaped air pipe (34), and the inlet port of the pressure regulating valve (31) is connected to the outlet port of the front end cap (32).

8. The butterfly valve opening mechanism according to claim 1, characterized in that: The bottom surface of the filter canister (37) is provided with an air inlet, and the bottom port of the front end cap (32) is connected to the top air outlet port of the filter canister (37) to deliver the air filtered by the air filter element (36) to the inside of the air pressure regulating valve (31).

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