High-flow-rate butterfly valve

Abstract

The utility model relates to a butterfly valve with high flow velocity, which comprises a valve body, a valve clack, an anti-vibration mechanism, a transmission rocker arm, a driving oil cylinder, a positioning wall plate and a hydraulic system, the valve clack adopts a shaft-clack integrated design and is arranged in the valve body, and a shaft of the valve clack extends out from two sides of the valve body; the anti-vibration mechanism is mounted on one side of the valve body and is connected with the overhanging shaft on one side of the valve clack; and the transmission rocker arm is located on the other side of the valve body and is in transmission connection with an overhanging shaft on the other side of the valve clack, the transmission rocker arm is driven by a driving oil cylinder, and the driving oil cylinder is supported by a positioning wall plate and is powered by a hydraulic system. Compared with the prior art, the utility model has the advantages of low opening and closing pressure difference, large flow area, good dynamic characteristic, good vibration absorption effect, strong vibration resistance and the like, and is suitable for control and application of a high-flow-speed working condition with the maximum flow speed of 10m / s.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a high-flow-rate butterfly valve. Background Art

[0002] With the development of the industrial system, high-flow hydraulic conditions in water conservancy and hydropower systems are becoming more and more common, and the demand for control performance, efficiency, and functions of opening and closing equipment is becoming more and more eager. Previously, when some butterfly valves and ball valves were used in medium-flow conditions, they always encountered large and small problems and failures after a period of time: such as flow area problems, loose joint pin problems, vibration and jitter problems, etc., which greatly affected the operation of their own equipment and downstream equipment, and were even more unsuitable for high-flow systems.

[0003] For example, the utility model with publication number CN117967805A discloses a wear-resistant sealed butterfly valve, which controls the butterfly valve through an opening and closing control mechanism and a hand wheel; the utility model with publication number CN117989336A discloses a high-sealing and anti-scour butterfly valve, which controls the butterfly valve through a closing component, and the closing component includes a coaxially connected seal 2 and a seal 1.

[0004] The above existing solutions for butterfly valve control cannot ensure the stability of the structure in a high flow rate system. Utility Model Content

[0005] The purpose of the utility model is to provide a high-flow rate butterfly valve in order to overcome the defects of the prior art that the existing butterfly valves and ball valves cannot ensure the stability of the structure in a high-flow rate system.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A high-flow rate butterfly valve comprises a valve body, a valve disc, an anti-vibration mechanism, a transmission rocker arm, a driving cylinder, a positioning wall plate and a hydraulic system, wherein the valve disc is of an integrated shaft-disc design and is installed in the valve body, and the shaft of the valve disc extends from both sides of the valve body; the anti-vibration mechanism is installed on one side of the valve body and is connected to the outwardly extending shaft on one side of the valve disc; the transmission rocker arm is located on the other side of the valve body and is transmission-connected to the outwardly extending shaft on the other side of the valve disc, the transmission rocker arm is driven by the driving cylinder, the driving cylinder is supported by the positioning wall plate and is powered by the hydraulic system.

[0008] Furthermore, the valve body comprises a left valve body and a right valve body which are assembled together, and the valve body is also connected with a misalignment pin, and the left valve body and the right valve body are positioned relative to each other through the misalignment pin.

[0009] Furthermore, the anti-vibration mechanism includes an adjustment mechanism, a disc spring bracket, a disc spring leaf group, a disc spring cylinder, a small rocker arm, a travel switch, a travel dial and an anti-vibration box. The disc spring cylinder is fixed by the disc spring bracket, and the disc spring leaf group is installed in the inner cavity of the disc spring cylinder to balance the load; the adjustment mechanism is installed at the upper end of the disc spring cylinder to adjust the disc spring stroke in the disc spring cylinder; one end of the small rocker arm is transmission-connected to the outward extension shaft of the valve disc, and the other end is connected to the bottom output end of the disc spring cylinder; the anti-vibration box is installed on the valve body and supports the disc spring bracket, and the small rocker arm, the travel switch and the travel dial are all located in the anti-vibration box; the travel dial is fixed on the small rocker arm and rotates synchronously with the small rocker arm; there are multiple travel switches, which are located at different positions in the anti-vibration box and correspond to the rotation path of the travel dial to sense the opening and closing state of the valve disc.

[0010] Furthermore, the small rocker arm is connected to the outwardly extending shaft of the valve disc via a spline.

[0011] Furthermore, the transmission rocker arm is connected to the outwardly extending shaft of the valve disc by a wedge-shaped spline.

[0012] Furthermore, a crank sliding mechanism is formed between the driving oil cylinder and the transmission rocker arm, which is used to transmit the driving torque of the hydraulic system and drive the valve flap to open and close.

[0013] Furthermore, one end of the positioning wall plate is fixed to one side of the valve body, and the bottom surface is fixed to the foundation.

[0014] Furthermore, the hydraulic system's valve opening interface high-pressure pipe is connected to the rodless chamber of the driving cylinder, and the valve closing interface high-pressure pipe is connected to the rod chamber of the driving cylinder, which are used to provide driving force to control the opening and closing of the valve disc under high flow rate conditions.

[0015] Furthermore, the outer circumferential surface of the axial end of the connecting portion between the valve flap and the valve body is provided with wear-resistant and corrosion-resistant special welding steel after surfacing welding and fine processing.

[0016] Furthermore, a sealing ring is provided at the opening and closing contact portion between the valve flap and the inside of the valve body.

[0017] Compared with the prior art, the utility model has the following advantages:

[0018] (1) The high-flow butterfly valve provided by the utility model adopts a valve disc with a large CV value. Under high-flow conditions, the flow area is large and the impact force is small; one end of the valve disc's extended shaft is driven and controlled by a driving mechanism composed of a transmission rocker arm, a driving cylinder and a hydraulic system. The hydraulic transmission method is stable and reliable, with a large driving torque, which is conducive to absorbing and balancing water flow vibration under high-flow conditions; the other end of the valve disc's extended shaft is connected to an anti-vibration mechanism, which can reduce the vibration of the valve disc during the opening and closing process of the valve disc, and effectively reduce the amplitude of the jitter and vibration of the valve disc under high-flow operation; as a whole, it has the advantages of low opening and closing pressure difference, large flow area, good dynamic characteristics, good vibration absorption effect, strong anti-vibration performance, etc., and is suitable for the control and use of high-flow conditions with a maximum flow rate of 10m / s.

[0019] (2) Optimized design of valve body, disc and shaft: The valve body adopts a half design, which is manufactured in parts and assembled in one piece. The disc and valve shaft adopt an integrated design and are cast as a whole. Since the disc shaft adopts a pinless connection design, it avoids the influence of high flow rate vibration and greatly improves the reliability of the connection.

[0020] (3) Good dynamic characteristics: Due to the small eccentric structure of the valve disc, the opening and closing pressure difference is low; the shaft-disc connection distance is short, the flow area is large, the water loss is small, the flow rate is large, and the hydraulic self-closing trend of the valve is utilized when closing the valve to ensure that it can be safely closed under pressure under any working conditions.

[0021] (4) The setting of the hydraulic drive system is conducive to vibration absorption and control: the hydraulic device is used to control the opening and closing, which is stable and reliable, has a large driving torque, overcomes the impact force, and is conducive to absorbing and balancing water flow vibration under high water flow conditions in the fully open state.

[0022] (5) The structural design of the anti-vibration disc spring system is conducive to vibration reduction: The structural design of the anti-vibration disc spring system can effectively reduce the amplitude of the jitter and vibration of the valve disc under high flow rate operation, and reduce the friction fatigue and clearance fluctuation of the connecting mechanism such as the disc shaft and the cylinder relay related pin shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the main structure of a high-flow rate butterfly valve provided in an embodiment of the utility model;

[0024] Figure 2 It is a right view structural schematic diagram of a high flow rate butterfly valve provided in an embodiment of the utility model;

[0025] Figure 3 A structural schematic diagram of a hydraulic system provided in an embodiment of the utility model;

[0026] Figure 4 for Figure 1 AA cross-section diagram;

[0027] Figure 5This is a schematic diagram of the structure of a valve flap provided in an embodiment of the utility model;

[0028] Figure 6 This is a schematic diagram of a valve body assembly state provided in an embodiment of the utility model;

[0029] Figure 7 A schematic diagram of a valve body separation state and a valve disc position state provided in an embodiment of the utility model;

[0030] Figure 8 This is a schematic diagram of the assembly state of a valve body, a valve flap, an anti-vibration mechanism and a driving mechanism provided in an embodiment of the utility model;

[0031] In the figure, 1. valve body, 2. valve disc, 3. sealing ring, 4. anti-vibration mechanism, 4-1. adjustment mechanism, 4-2. disc spring bracket, 4-3. disc spring assembly, 4-4. disc spring cylinder, 4-5. small rocker arm, 4-6. travel switch, 4-7. travel dial plate, 4-8. anti-vibration box, 5. transmission rocker arm, 6. offset pin, 7. driving cylinder, 8. positioning wall panel, 9. hydraulic system. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0035] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, or are the directions or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model.

[0036] Example 1

[0037] like Figure 1 , Figure 2 , Figure 3 and Figure 8 As shown, this embodiment provides a high-flow rate butterfly valve, including a valve body 1, a valve disc 2, an anti-vibration mechanism 4, a transmission rocker arm 5, a driving cylinder 7, a positioning wall plate 8 and a hydraulic system 9. The valve disc 2 is an integrated shaft-disc design and is installed in the valve body 1. The shaft of the valve disc 2 extends from both sides of the valve body 1; the anti-vibration mechanism 4 is installed on one side of the valve body 1 and is connected to the extended shaft on one side of the valve disc 2; the transmission rocker arm 5 is located on the other side of the valve body 1 and is transmission-connected to the extended shaft on the other side of the valve disc 2. The transmission rocker arm 5 is driven by the driving cylinder 7, the driving cylinder 7 is supported by the positioning wall plate 8, and is powered by the hydraulic system 9.

[0038] Working principle: The valve disc and the valve shaft are integrated into a single piece and cast to form the valve disc 2. Since the disc shaft adopts a pinless connection design, it avoids the influence of high flow rate vibration and greatly improves the reliability of the connection.

[0039] The transmission rocker arm 5, the driving cylinder 7 and the hydraulic system 9 are connected to the outward extension shaft at one end of the valve disc 2. The opening and closing of the high-flow rate butterfly valve is controlled by the driving structure composed of the hydraulic system 9, the transmission rocker arm 5, the driving cylinder 7 and the valve disc 2. The hydraulic transmission method is stable and reliable, with a large driving torque to overcome the impact force. It is conducive to absorbing and balancing the water flow vibration under the high water flow condition in the fully open state;

[0040] The anti-vibration mechanism 4 is connected to the outwardly extending shaft at the other end of the valve flap 2, and can reduce the vibration of the valve flap during the opening and closing process of the valve flap 2, effectively reducing the amplitude of the jitter and vibration of the valve flap under high flow rate operation.

[0041] Preferably, Figure 6 and Figure 7 As shown, the valve body 1 includes a left valve body 1-1 and a right valve body 1-2 which are assembled, and the valve body 1 is also connected with a dislocation pin 6, and the left valve body 1-1 and the right valve body 1-2 are positioned relative to each other through the dislocation pin 6. After the left valve body 1-1 and the right valve body 1-2 are assembled, two pins can be used to install them in a high and low dislocation, so as to ensure that the left valve body 1-1 and the right valve body 1-2 are accurately positioned and not easily offset.

[0042] Preferably, the outer cylindrical surface of the shaft end of the connecting part of the valve flap 2 and the valve body 1 needs to be clad with wear-resistant and corrosion-resistant special welding steel and then fine-processed to improve the stability of the connection; the opening and closing contact part of the valve flap 2 and the inside of the valve body 1 is also provided with a sealing ring 3 to improve the sealing performance of the valve flap 2; wherein the length of the solid cross-section of the two ends and the middle hollow area of ​​the valve flap 2 is less than 1.2 times the shaft diameter of the valve flap 2, such as Figure 5 shown.

[0043] Preferably, Figure 4 As shown, the anti-vibration mechanism 4 includes an adjustment mechanism 4-1, a disc spring bracket 4-2, a disc spring leaf group 4-3, a disc spring cylinder 4-4, a small rocker arm 4-5, a travel switch 4-6, a travel dial plate 4-7 and an anti-vibration box 4-8. The disc spring cylinder 4-4 is fixed by the disc spring bracket 4-2, and the disc spring leaf group 4-3 is installed in the inner cavity of the disc spring cylinder 4-4 to balance the vibration load;

[0044] The adjustment mechanism 4-1 is installed at the upper end of the disc spring cylinder 4-4, and is mainly used to adjust the disc spring stroke corresponding to the fluctuating impulse load generated under different flow rates, ensuring that different flow rates can maintain a balanced state and avoid large vibration fluctuations and mismatching; the adjustment mechanism 4-1 can be any structure that can dynamically adjust the stroke of the disc spring group and can provide elastic expansion and contraction.

[0045] One end of the small rocker arm 4-5 is connected to the outward extension shaft of the valve disc 2, and the other end is connected to the bottom output end of the disc spring cylinder 4-4. The anti-vibration box 4-8 is installed on the valve body 1 and supports the disc spring bracket 4-2. The small rocker arm 4-5, the travel switch 4-6 and the travel dial plate 4-7 are all located in the anti-vibration box 4-8;

[0046] The travel plate 4-7 is fixed on the small rocker arm 4-5 and rotates synchronously with the small rocker arm 4-5; there are multiple travel switches 4-6, which are respectively located at different positions in the anti-vibration box 4-8 and correspond to the rotation path of the travel plate 4-7, and are used to sense the opening and closing state of the valve disc 2;

[0047] There are two optional travel switches 4-6, which are respectively installed at the upper and lower ends of the anti-vibration box 4-8, and are used to sense and send signals of the position of the travel dial plate 4-7, that is, the opening and closing position and the opening position of the valve disc;

[0048] Optionally, the small rocker arm 4 - 5 is connected to the outwardly extending shaft of the valve disc 2 through a spline to transmit the flow velocity load.

[0049] Preferably, one end of the transmission rocker arm 5 is connected to the outward shaft of the valve disc 2 by a wedge-shaped spline, and the other end is connected to the relay end of the driving cylinder 7. The spline connection is mainly used to evenly distribute the driving torque of the hydraulic system 9.

[0050] One end of the driving cylinder 7 is installed at the bottom of the positioning wall panel 8, and the other end is connected to the pin of the transmission rocker arm 5. This structure is connected to the transmission rocker arm 5 as a crank sliding mechanism, which is used to transmit the driving torque of the hydraulic system; a crank sliding mechanism is formed between the driving cylinder 7 and the transmission rocker arm 5, which is used to transmit the driving torque of the hydraulic system 9 and drive the valve flap 2 to open and close.

[0051] Preferably, one side of the positioning wall plate 8 is fixed to the side of the valve body 1, and the bottom is fixed to the foundation. Optionally, the side of the positioning wall plate 8 is locked to one side end of the valve body 1 with screws, and the bottom is fixed to the foundation with expansion anchor bolts to ensure the accurate installation and execution of the parallelism and verticality of the oil cylinder to the valve body, and reduce the rotation wear of the shaft pin.

[0052] Optionally, the valve opening interface high-pressure pipe of the hydraulic system 9 is connected to the rodless chamber of the driving cylinder 7, and the valve closing interface high-pressure pipe is connected to the rod chamber of the driving cylinder 7, which is used to provide a driving force to control the opening and closing of the valve flap 22 under high flow rate conditions.

[0053] A specific embodiment example of the high flow rate butterfly valve is provided below:

[0054] A high-flow butterfly valve, the valve is composed of main parts such as a valve body 1, a valve disc 2, a sealing ring 3, an anti-vibration mechanism 4, a transmission rocker arm 5, a dislocation pin 6, a driving oil cylinder 7, a positioning wall plate 8, and a hydraulic system 9; the valve body is composed of two half bodies, a left valve body 1-1 and a right valve body 1-2; the valve disc is an integrated shaft disc design and is integrally cast; the anti-vibration mechanism is composed of an adjustment mechanism 4-1, a disc spring bracket 4-2, a disc spring plate group 4-3, a disc spring cylinder body 4-4, a small rocker arm 4-5, a travel switch 4-6, a travel dial plate 4-7, and an anti-vibration box body 4-8 components to realize the technical solution;

[0055] The valve body 1 is a semi-cylindrical split structure, which is assembled into a combined body by two semi-circular Half bodies, the left valve body 1-1 and the right valve body 1-2, and the inlet and outlet of the valve body are standard flanges.

[0056] The valve flap 2 is an integrated shaft flap design and is integrally cast. The shaft flap is pinless connected, and the outer cylindrical surface of the shaft end of the connection part between the valve flap 2 and the valve body 1 needs to be surfacing welded with wear-resistant and corrosion-resistant special welding steel and then finely processed.

[0057] The anti-vibration mechanism 4 is composed of an adjustment mechanism 4-1, a disc spring bracket 4-2, a disc spring leaf group 4-3, a disc spring cylinder 4-4, a small rocker arm 4-5, a travel switch 4-6, a travel dial plate 4-7, and an anti-vibration box 4-8. The adjustment mechanism 4-1 is installed at the upper end of the disc spring cylinder 4-4, and is mainly used to adjust the disc spring stroke corresponding to the impulse load generated under different flow rates to ensure that different flow rates can maintain balance and avoid larger vibration fluctuations and mismatching. The disc spring bracket 4-2 is used to fix the disc spring cylinder 4-4. The disc spring leaf group 4-3 is installed in the inner cavity of the disc spring cylinder 4-4 to balance the load. The small rocker arm 4-5 is connected to the shaft of the valve disc 2 with a spline to transmit the flow rate load; the travel switch 4-6 is installed at the upper and lower ends of the box body to sense and send a signal of the position of the travel dial plate 4-7, that is, the opening and closing position of the valve disc; the travel dial plate 4-7 is fixed to a determined position of the small rocker arm 4-5 and rotates synchronously with the small rocker arm 4-5; the anti-vibration box body 4-8 is fixed to one end of the valve body to fix the disc spring bracket 4-2.

[0058] One end of the transmission rocker arm 5 is mounted on the valve disc extension shaft and connected by a wedge spline, and the other end is connected to the servo end of the driving cylinder 7 to transmit the driving torque of the hydraulic system;

[0059] After the left valve body 1-1 and the right valve body 1-2 are assembled, the offset pin 6 is installed with two pins in a high and low offset manner to ensure that the two half bodies are accurately positioned;

[0060] One end of the driving cylinder 7 is installed at the bottom of the positioning wall plate 8, and the other end is connected to the column pin of the transmission rocker arm 5. This structure is connected to the transmission rocker arm 5 as a crank sliding mechanism, which is used to transmit the driving torque of the hydraulic system; the positioning wall plate 8 is locked to one side of the valve body 1 with screws, and the bottom surface and the foundation are fixed with expansion anchor bolts to ensure the accurate installation and execution of the cylinder with respect to the parallelism and verticality of the valve body, and reduce the rotational wear of the shaft pin; the hydraulic system 9, the high-pressure pipe of the valve opening interface is connected to the rodless cavity of the driving cylinder 7, and the high-pressure pipe of the valve closing interface is connected to the rod cavity of the driving cylinder 7, which is used to provide a driving force to control the opening and closing of the valve disc 2 under high flow rate conditions.

[0061] The high-flow butterfly valve provided by this solution adopts a large CV value design. Under high-flow conditions, the flow area is large and the impact force is small, so this design allows the valve to withstand a maximum flow rate of up to 10m / s. The adaptability to high flow rates is much better than that of traditional water conservancy system butterfly valves and ball valves. The hydraulic system and anti-vibration disc spring mechanism design with wedge-shaped spline connection at the end of the valve ensure that the entire valve structure operates smoothly under high-flow conditions, has good vibration absorption and strong vibration resistance.

[0062] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A high flow rate butterfly valve, characterized in that: The invention comprises a valve body (1), a valve flap (2), an anti-vibration mechanism (4), a transmission rocker arm (5), a driving oil cylinder (7), a positioning wall plate (8) and a hydraulic system (9), wherein the valve flap (2) is designed as an integrated shaft flap and is installed in the valve body (1), and the shaft of the valve flap (2) extends from both sides of the valve body (1); the anti-vibration mechanism (4) is installed on one side of the valve body (1) and is connected to the protruding shaft on one side of the valve flap (2); the transmission rocker arm (5) is located on the other side of the valve body (1) and is transmission-connected to the protruding shaft on the other side of the valve flap (2); the transmission rocker arm (5) is driven by the driving oil cylinder (7), and the driving oil cylinder (7) is supported by the positioning wall plate (8) and is powered by the hydraulic system (9).

2. A high flow rate butterfly valve according to claim 1, characterized in that: The valve body (1) comprises a left valve body (1-1) and a right valve body (1-2) which are assembled together. The valve body (1) is also connected to a dislocation pin (6). The left valve body (1-1) and the right valve body (1-2) are positioned relative to each other via the dislocation pin (6).

3. A high flow rate butterfly valve according to claim 1, characterized in that: The anti-vibration mechanism (4) comprises an adjustment mechanism (4-1), a disc spring bracket (4-2), a disc spring leaf group (4-3), a disc spring cylinder (4-4), a small rocker arm (4-5), a travel switch (4-6), a travel dial plate (4-7) and an anti-vibration box (4-8); the disc spring cylinder (4-4) is fixed by the disc spring bracket (4-2); the disc spring leaf group (4-3) is installed in the inner cavity of the disc spring cylinder (4-4) for balancing the vibration load; the adjustment mechanism (4-1) is installed at the upper end of the disc spring cylinder (4-4) for adjusting the disc spring travel in the disc spring cylinder (4-4); one end of the small rocker arm (4-5) is connected to the outer end of the valve flap (2); The extension shaft is connected to the bottom output end of the disc spring cylinder (4-4) at one end, and the other end is connected to the bottom output end of the disc spring cylinder (4-4). The anti-vibration box (4-8) is installed on the valve body (1) and supports the disc spring bracket (4-2). The small rocker arm (4-5), the travel switch (4-6) and the travel dial plate (4-7) are all located in the anti-vibration box (4-8); the travel dial plate (4-7) is fixed on the small rocker arm (4-5) and rotates synchronously with the small rocker arm (4-5); there are multiple travel switches (4-6), which are respectively located at different positions in the anti-vibration box (4-8) and correspond to the rotation path of the travel dial plate (4-7) to sense the opening and closing state of the valve flap (2).

4. A high flow rate butterfly valve according to claim 3, characterized in that: The small rocker arm (4-5) is connected to the outwardly extending shaft of the valve flap (2) via a spline.

5. A high flow rate butterfly valve according to claim 1, characterized in that: The transmission rocker arm (5) is connected to the outwardly extending shaft of the valve flap (2) by means of a wedge-shaped spline.

6. A high flow rate butterfly valve according to claim 1, characterized in that: A crank sliding mechanism is formed between the driving oil cylinder (7) and the transmission rocker arm (5), which is used to transmit the driving torque of the hydraulic system (9) and drive the valve flap (2) to open and close.

7. A high flow rate butterfly valve according to claim 1, characterized in that: One side of the positioning wall plate (8) is fixed to the side surface of the valve body (1), and the bottom surface is fixed to the foundation.

8. A high flow rate butterfly valve according to claim 1, characterized in that: The valve opening interface high-pressure pipe of the hydraulic system (9) is connected to the rodless chamber of the driving cylinder (7), and the valve closing interface high-pressure pipe is connected to the rod chamber of the driving cylinder (7), so as to provide a driving force to control the opening and closing of the valve flap (2) under high flow rate conditions.

9. A high flow rate butterfly valve according to claim 1, characterized in that: The outer cylindrical surface of the axial end of the connection part between the valve flap (2) and the valve body (1) is provided with wear-resistant and corrosion-resistant special welding steel after surfacing welding and fine processing.

10. A high flow rate butterfly valve according to claim 1, characterized in that: The opening and closing contact portion between the valve flap (2) and the interior of the valve body (1) is also provided with a sealing ring (3).

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