Pneumatic butterfly valve convenient to adjust

Abstract

The utility model relates to the technical field of pneumatic butterfly valves, and discloses a pneumatic butterfly valve convenient to adjust, which comprises a valve body and a main butterfly plate rotatably connected in the valve body, the top of the valve body is provided with a first pneumatic actuator used for driving the main butterfly plate to rotate, and the top of the main butterfly plate is fixedly connected with a first rotating rod. The first rotating rod penetrates through the valve body and is fixedly connected with the first pneumatic actuator, a first rotating block is fixedly connected to the bottom of the main butterfly plate, a first rotating groove is formed in the inner wall of the bottom of the valve body, and the end, away from the main butterfly plate, of the first rotating block is rotationally connected with the first rotating groove; an auxiliary butterfly plate is rotationally connected into the fine adjustment hole, and the end, away from the first pneumatic actuator, of the auxiliary butterfly plate is connected with a rotating assembly. According to the pneumatic butterfly valve convenient to adjust, the small auxiliary butterfly plate is arranged on the main butterfly plate, so that small flow control can be achieved by rotating the auxiliary butterfly plate when small flow is needed, and the precision of flow control is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic butterfly valves, in particular to a pneumatic butterfly valve which is easy to adjust. Background Art

[0002] Pneumatic butterfly valve is composed of pneumatic actuator and butterfly valve. Pneumatic butterfly valve is a pneumatic valve that uses a circular butterfly plate that rotates with the valve stem to open and close to achieve the activation action. It is mainly used as a shut-off valve, and can also be designed to have the function of regulation or section valve and regulation. Butterfly valves are increasingly used in low-pressure large and medium-diameter pipelines.

[0003] For example, the patent with patent number CN220435444U discloses a pneumatic butterfly valve that is easy to adjust, including a valve body and a valve plate rotatably installed in the valve body, the bottom of the valve plate is fixedly connected with a connecting column, the connecting column rotates and penetrates to the bottom of the valve body, an adjusting hole is opened on the surface of the valve plate, a groove is opened inside the valve plate, an adjusting plate is arranged in the groove, a nut is rotatably connected to the lower end of the connecting column, a screw is connected to the internal thread of the nut, and the upper end of the screw is fixedly connected to the adjusting plate; through the arrangement of the connecting column, the adjusting hole, the adjusting plate, the nut and the screw, when it is necessary to finely adjust the flow of the pneumatic butterfly valve, the nut can be rotated so that the nut drives the screw to move in the connecting column, the screw drives the adjusting plate to slide in the groove, and the adjusting plate blocks the adjusting hole, thereby adjusting the flow of the adjusting hole to avoid excessive or insufficient flow, thereby improving the applicability of the pneumatic butterfly valve.

[0004] However, the pneumatic butterfly valve in the above technology still has the following problems:

[0005] Although the adjustment plate slides up and down in the groove to block the adjustment hole, so that the flow of the pneumatic butterfly valve can be finely adjusted, part of the flow will enter the groove when the flow passes through the adjustment hole. When the adjustment plate blocks and closes the adjustment hole, the flow in the groove will hinder the upward adjustment of the adjustment plate. If a gap is set at the connection between the adjustment plate and the groove so that the flow in the groove can be squeezed out of the groove when the adjustment plate is adjusted, the sealing performance of the pneumatic butterfly valve will be reduced, which has great disadvantages in use. Utility Model Content

[0006] In view of the deficiencies of the prior art, the utility model provides a pneumatic butterfly valve that is easy to adjust, such as: while ensuring the sealing performance of the pneumatic butterfly valve, the flow control of the original pneumatic butterfly valve can be finely adjusted.

[0007] To achieve the above-mentioned objectives, the utility model provides the following technical solutions: an adjustable pneumatic butterfly valve, comprising a valve body and a main butterfly plate rotatably connected in the valve body, a first pneumatic actuator for driving the main butterfly plate to rotate is provided on the top of the valve body, a first rotating rod is fixedly connected to the top of the main butterfly plate, the first rotating rod passes through the valve body and is fixedly connected to the first pneumatic actuator, a first rotating block is fixedly connected to the bottom of the main butterfly plate, a first rotating groove is provided on the inner wall of the bottom of the valve body, an end of the first rotating block away from the main butterfly plate is rotatably connected to the first rotating groove, a fine-adjustment hole is provided through the middle side surface of the main butterfly plate, a secondary butterfly plate is rotatably connected in the fine-adjustment hole, and a rotating assembly is connected to the end of the secondary butterfly plate away from the first pneumatic actuator.

[0008] Furthermore, the rotating assembly includes a second rotating rod and a second pneumatic actuator, and one end of the auxiliary butterfly plate away from the first pneumatic actuator is fixedly connected to the second rotating rod, and one end of the second rotating rod away from the auxiliary butterfly plate passes through the main butterfly plate, the first rotating block and the valve body in sequence, and is fixedly connected to the second pneumatic actuator, and the second pneumatic actuator is fixedly connected to the outer wall of the valve body.

[0009] Furthermore, the first pneumatic actuator and the second pneumatic actuator are components of the same type.

[0010] Furthermore, a second rotating block is fixedly connected to a side of the auxiliary butterfly plate away from the second rotating rod, a second rotating groove is formed on a side of the fine adjustment hole close to the first pneumatic actuator, and the second rotating block is rotatably connected to the second rotating groove.

[0011] Furthermore, a sealing gasket is provided between the auxiliary butterfly plate and the fine adjustment hole.

[0012] Compared with the prior art, the utility model has the following beneficial effects:

[0013] This pneumatic butterfly valve which is easy to adjust has a small auxiliary butterfly plate arranged on the main butterfly plate. When a smaller flow rate is required, the auxiliary butterfly plate can be rotated to achieve smaller flow control, thereby further improving the accuracy of flow control. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the overall appearance connection structure of the utility model;

[0015] Figure 2 This is a cross-sectional schematic diagram of the valve body connection structure of the utility model;

[0016] Figure 3 Based on Figure 2 Schematic diagram of valve body cross-section;

[0017] Figure 4 This is a schematic diagram of another connection structure of the auxiliary butterfly plate of the utility model;

[0018] Figure 5 Based on Figure 4 Exploded diagram of the connection structure.

[0019] In the figure: 1, valve body; 2, main butterfly plate; 3, first pneumatic actuator; 4, first rotating rod; 5, first rotating block; 6, auxiliary butterfly plate; 7, second rotating rod; 8, second pneumatic actuator; 9, second rotating block; 101, first rotating groove; 201, fine adjustment hole; 202, second rotating groove. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] See also Figure 1 - Figure 5 A pneumatic butterfly valve that is easy to adjust comprises a valve body 1 and a main butterfly plate 2 rotatably connected in the valve body 1. A first pneumatic actuator 3 for driving the main butterfly plate 2 to rotate is provided on the top of the valve body 1. A first rotating rod 4 is fixedly connected to the top of the main butterfly plate 2. The first rotating rod 4 penetrates the valve body 1 and is fixedly connected to the first pneumatic actuator 3. A first rotating block 5 is fixedly connected to the bottom of the main butterfly plate 2. A first rotating groove 101 is provided on the inner wall of the bottom of the valve body 1. One end of the first rotating block 5 away from the main butterfly plate 2 is rotatably connected to the first rotating groove 101. A fine adjustment hole 201 is penetrated and provided on the middle side surface of the main butterfly plate 2. A secondary butterfly plate 6 is rotatably connected in the fine adjustment hole 201. A rotating component is connected to one end of the secondary butterfly plate 6 away from the first pneumatic actuator 3.

[0022] like Figure 1 - Figure 5 As shown, the pneumatic butterfly valve that is easy to adjust in the utility model is similar to the existing pneumatic butterfly valve that is easy to adjust, such as the pneumatic butterfly valve that is easy to adjust disclosed in the patent with publication number CN220435444U. The main improvement of the utility model is that it can ensure that the flow in the valve body 1 does not leak while performing more precise flow control, such as Figures 1 to 5As shown, when the pneumatic butterfly valve that is easy to adjust in the utility model is in use, when a larger flow rate is required to pass through the valve body 1, the first pneumatic actuator 3 can be used to drive the first rotating rod 4 to rotate, thereby driving the main butterfly plate 2 inside the valve body 1 to flip, so that the flow in the valve body 1 can flow. When a smaller flow rate is required to flow, the auxiliary butterfly plate 6 in the fine-adjusting hole 201 can be driven to flip by the rotating component while the main butterfly plate 2 does not move, so that a smaller flow rate can flow from the main butterfly plate 2 through the fine-adjusting hole 201, away from the circulation operation mode similar to the main butterfly plate 2, thereby avoiding leakage of flow in the valve body 1 when the auxiliary butterfly plate 6 is closed, and at the same time as being able to control a smaller flow rate, the airtightness of the butterfly valve inside the valve body 1 is improved.

[0023] like Figure 1 - Figure 5 As shown, the rotating assembly includes a second rotating rod 7 and a second pneumatic actuator 8, and the end of the auxiliary butterfly plate 6 away from the first pneumatic actuator 3 is fixedly connected to the second rotating rod 7. The end of the second rotating rod 7 away from the auxiliary butterfly plate 6 passes through the main butterfly plate 2, the first rotating block 5 and the valve body 1 in sequence, and is fixedly connected to the second pneumatic actuator 8. The second pneumatic actuator 8 is fixedly connected to the outer wall of the valve body 1. When the auxiliary butterfly plate 6 is rotated to adjust the flow, the second rotating rod 7 is driven to rotate by starting the second pneumatic actuator 8. The second rotating rod 7 passes through the valve body 1, the first rotating block 5 and the main butterfly plate 2, and drives the auxiliary butterfly plate 6 to rotate, so that when the auxiliary butterfly plate 6 is rotated, the state of the main butterfly plate 2 will not be affected, and the movements between the first pneumatic actuator 3 and the second pneumatic actuator 8 will not interfere with each other, so that the flow can be more finely controlled and smoother.

[0024] like Figure 1 - Figure 5 As shown, the first pneumatic actuator 3 and the second pneumatic actuator 8 are components of the same type. The first pneumatic actuator 3 and the second pneumatic actuator 8 are designed as components of the same type to facilitate the manufacture and installation of the butterfly valve.

[0025] like Figure 1 - Figure 5 As shown, the side of the auxiliary butterfly plate 6 away from the second rotating rod 7 is fixedly connected with the second rotating block 9, the side of the fine adjustment hole 201 close to the first pneumatic actuator 3 is provided with a second rotating groove 202, and the second rotating block 9 is rotatably connected with the second rotating groove 202. When the second pneumatic actuator 8 drives the auxiliary butterfly plate 6 to rotate through the second rotating rod 7, the other end of the auxiliary butterfly plate 6 is connected between the second rotating block 9 and the second rotating groove 202, so that the upper and lower ends of the auxiliary butterfly plate 6 are connected to the main butterfly plate 2, thereby improving the connection firmness of the auxiliary butterfly plate 6.

[0026] like Figure 1 - Figure 5As shown, a sealing gasket is provided between the auxiliary butterfly plate 6 and the fine adjustment hole 201. A sealing gasket is provided between the auxiliary butterfly plate 6 and the fine adjustment hole 201 to further improve the tightness of the connection between the auxiliary butterfly plate 6 and the main butterfly plate 2, and to avoid leakage of the flow inside the valve body 1 when the auxiliary butterfly plate 6 is closed.

[0027] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention.

Claims

1. A pneumatic butterfly valve that is easy to adjust, comprising a valve body (1) and a main butterfly plate (2) rotatably connected to the valve body (1), a first pneumatic actuator (3) for driving the main butterfly plate (2) to rotate is provided on the top of the valve body (1), and is characterized in that: The top of the main butterfly plate (2) is fixedly connected to a first rotating rod (4), the first rotating rod (4) passes through the valve body (1) and is fixedly connected to the first pneumatic actuator (3), the bottom of the main butterfly plate (2) is fixedly connected to a first rotating block (5), the inner wall of the bottom of the valve body (1) is provided with a first rotating groove (101), one end of the first rotating block (5) away from the main butterfly plate (2) is rotatably connected to the first rotating groove (101), a fine adjustment hole (201) is passed through the middle side surface of the main butterfly plate (2), an auxiliary butterfly plate (6) is rotatably connected in the fine adjustment hole (201), and one end of the auxiliary butterfly plate (6) away from the first pneumatic actuator (3) is connected to a rotating assembly.

2. The pneumatic butterfly valve that is easy to adjust according to claim 1 is characterized in that: The rotating assembly comprises a second rotating rod (7) and a second pneumatic actuator (8); one end of the auxiliary butterfly plate (6) away from the first pneumatic actuator (3) is fixedly connected to the second rotating rod (7); one end of the second rotating rod (7) away from the auxiliary butterfly plate (6) passes through the main butterfly plate (2), the first rotating block (5) and the valve body (1) in sequence, and is fixedly connected to the second pneumatic actuator (8); the second pneumatic actuator (8) is fixedly connected to the outer wall of the valve body (1).

3. The pneumatic butterfly valve that is easy to adjust according to claim 2 is characterized in that: The first pneumatic actuator (3) and the second pneumatic actuator (8) are components of the same type.

4. A pneumatic butterfly valve that is easy to adjust according to claim 1, 2 or 3, characterized in that: A second rotating block (9) is fixedly connected to the side of the auxiliary butterfly plate (6) away from the second rotating rod (7), a second rotating groove (202) is provided on the side of the fine adjustment hole (201) close to the first pneumatic actuator (3), and the second rotating block (9) is rotatably connected to the second rotating groove (202).

5. The pneumatic butterfly valve that is easy to adjust according to claim 1, 2 or 3, characterized in that: A sealing gasket is provided between the auxiliary butterfly plate (6) and the fine adjustment hole (201).

6. The pneumatic butterfly valve that is easy to adjust according to claim 4 is characterized in that: A sealing gasket is provided between the auxiliary butterfly plate (6) and the fine adjustment hole (201).

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