Butterfly valve with purging valve seat

Abstract

The utility model discloses a butterfly valve with a purging valve seat, belongs to the technical field of butterfly valves, and solves the problem that a valve plate is easy to damage once solid impurity particles attached to the butterfly valve collide when the valve plate rotates to be closed. The valve seat is fixedly connected to an inner ring of the valve body, the valve plate is rotationally connected into the valve body and can be attached to the valve seat, and an air injection hole is formed in the end face, facing the valve plate, of the valve seat. The rotating angles of the valve rod and the valve plate are monitored through the angle sensor, when the angle between the valve plate and the valve seat is close to 0-10 degrees, the angle sensor sends a signal to the controller, the controller immediately starts the air pump, air is sucked in through a series of connecting pipelines and sprayed outwards from the one-way valve, and the cleaning effect on the valve plate and the valve seat is achieved. In the process, impurities on the edge of the valve plate are removed, spraying cleaning is carried out on the valve seat, attachment of solid particles is effectively prevented, and damage to the valve plate and the valve seat during closing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to a butterfly valve with a valve seat and purge function. Background Art

[0002] The butterfly valve is a regulating valve with a simple structure, small size and light weight. It mainly opens or closes the fluid in the pipeline by rotating a disc-shaped butterfly plate around the axis. The butterfly plate of the butterfly valve is located in the diameter direction of the pipeline. When the butterfly plate fits tightly with the sealing surface of the valve seat, the valve is in a closed state, which can effectively cut off the flow of the medium; when the butterfly plate rotates to be parallel to the pipeline, the valve is in a fully open state, allowing the medium to pass through unimpeded. The butterfly valve has the characteristics of small fluid resistance, rapid opening and closing, and easy operation. It is suitable for the transportation and control of various media such as water, air, and natural gas. In addition, the butterfly valve also has a good flow regulation function. It can adjust the flow rate by changing the opening angle of the butterfly plate. It is widely used in the fields of petroleum, chemical industry, metallurgy, hydropower, etc. Due to the structural characteristics of the butterfly valve, it is particularly suitable for high pressure, large diameter or space-constrained occasions.

[0003] The butterfly valve body is fixedly connected with a valve seat which contacts the valve plate to ensure that the valve plate can seal the valve body. During the long-term transportation of the fluid, certain solid impurities will remain on the end surface of the valve seat and adhere to it. Once the solid impurity particles attached to it collide with the valve plate when it rotates and closes, the valve plate is prone to damage. Even after these solid impurities are removed later, the sealing effect between the valve plate and the valve seat is still problematic.

[0004] Therefore, a butterfly valve with a valve seat and purge function is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a butterfly valve with a valve seat and a purge function.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A valve seat with a purge butterfly valve comprises a valve body, a valve seat fixedly connected to the inner ring of the valve body, a valve plate rotatably connected to the valve body and capable of being arranged in close contact with the valve seat, wherein the valve seat is provided with an air jet hole on the end surface facing the valve plate, and the valve body is provided with a connecting groove connected to a plurality of the air jet holes, and the connecting groove is connected to a pump air component.

[0008] Preferably, the air pump assembly includes a connecting pipe connected to the connecting groove, and an air pump connected to the connecting pipe.

[0009] Preferably, a one-way valve is fixedly connected inside the jet hole, and the one-way valve guides the fluid to flow from the jet hole to the outside.

[0010] Preferably, the outer ring of the valve body is fixedly connected to a plurality of connecting frames, the connecting pipe is fixedly connected to an external connecting air pipe, the external connecting air pipe is connected to a plurality of branch pipes, the branch pipes pass through the valve body into the connecting groove, and the external connecting air pipe is fixedly connected to the connecting frame.

[0011] Preferably, it also includes a valve stem, an angle sensor, and a controller, the valve stem is arranged to pass through the valve body, and the valve plate is fixedly connected to the valve stem, the angle sensor is coaxially connected to the valve stem, and the output end of the angle sensor is coupled to the input end of the controller, and the output end of the controller is coupled to the air pump.

[0012] Preferably, it also includes a connecting seat fixedly connected to the valve body and communicated with the valve body, and a casing fixedly connected to the connecting seat, the valve stem passes through the connecting seat into the casing, and the angle sensor is fixedly connected to the inner top surface of the casing, a servo motor is fixedly connected to the side wall of the casing, the output shaft of the servo motor passes through the casing, and the output shaft of the servo motor is connected to the valve stem via a worm gear transmission, and the servo motor is coupled to a controller.

[0013] Preferably, both end surfaces of the valve body are fixedly connected with connecting flanges.

[0014] The utility model has the following beneficial effects:

[0015] The utility model uses an angle sensor to monitor the rotation angle of the valve stem and the valve plate. When the angle between the valve plate and the valve seat is close to 0-10°, the angle sensor sends a signal to the controller which is a single chip microcomputer. The controller then starts the air pump. Through a series of connecting pipes, air is sucked in and sprayed outward from the one-way valve to form a cleaning effect on the valve plate and the valve seat. This process not only removes impurities on the edge of the valve plate, but also sprays and cleans the valve seat, effectively preventing the adhesion of solid particles, avoiding damage to the valve plate and the valve seat when closed, and ensuring the stability of the sealing performance. After spraying for a certain period of time, the controller stops the air pump and continues to drive the servo motor to close the valve plate and the valve seat through the worm gear structure to achieve the sealing of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] 1. Valve body; 2. Connecting flange; 3. Connecting seat; 4. Casing; 5. Servo motor; 6. Connecting frame; 7. External connecting air pipe; 8. Valve stem; 9. Valve plate; 10. Valve seat; 11. Connecting pipe. DETAILED DESCRIPTION

[0018] 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.

[0019] Butterfly valve with purge seat, such as Figure 1 As shown, it includes a valve body 1, a valve seat 10 fixedly connected to the inner ring of the valve body 1, and a valve plate 9 rotatably connected to the valve body 1 and can be arranged in a fit with the valve seat 10. Both end faces of the valve body 1 are fixedly connected with connecting flanges 2. The end face of the valve seat 10 facing the valve plate 9 is provided with an injection hole. A connecting groove connected with the plurality of injection holes is provided in the valve body 1, and the connecting groove is connected with a pump gas component.

[0020] The pump air assembly includes a connecting pipe 11 connected to the connecting groove, and an air pump connected to the connecting pipe 11. A one-way valve is fixedly connected in the jet hole, and the one-way valve guides the fluid to flow from the jet hole to the outside. The outer ring of the valve body 1 is fixedly connected to a plurality of connecting frames 6. The connecting pipe 11 is fixedly connected to an external connecting air pipe 7. The external connecting air pipe 7 is connected to a plurality of branch pipes. The branch pipes pass through the valve body 1 to the connecting groove. The external connecting air pipe 7 is fixedly connected to the connecting frame 6.

[0021] It also includes a connecting seat 3 fixedly connected to the valve body 1 and communicated therewith, a casing 4 fixedly connected to the connecting seat 3, a valve stem 8, an angle sensor, and a controller. The valve stem 8 passes through the valve body 1, and the valve plate 9 is fixedly connected to the valve stem 8. The angle sensor is coaxially connected to the valve stem 8, and the output end of the angle sensor is coupled to the input end of the controller, and the output end of the controller is coupled to the air pump. The valve stem 8 passes through the connecting seat 3 to the casing 4, and the angle sensor is fixedly connected to the inner top surface of the casing 4. A servo motor 5 is fixedly connected to the side wall of the casing 4, and the output shaft of the servo motor 5 passes through the casing 4, and the output shaft of the servo motor 5 is connected to the valve stem 8 through a worm gear transmission, and the servo motor 5 is coupled to the controller.

[0022] The utility model can detect the rotation angle of the valve stem 8 and the valve plate 9 through the angle sensor. When the angle between the valve plate 9 and the valve seat 10 is only 0-10°, the angle sensor detects this situation and transmits the signal to the controller, which controls the air pump through the controller of the single-chip microcomputer, so that the air pump can suck the outside air through the connecting pipe 11, the external connecting air pipe 7, the branch pipe, and the jet hole in sequence, and spray it from the outside to the inside through the one-way valve, so that the fast-flowing air can be sprayed on the valve plate 9. Since the distance between the valve plate 9 and the valve seat 10 is small at this time, the valve seat 10 The gas ejected from the top can also act in the opposite direction to the valve seat 10, not only cleaning the edge of the valve plate 9, but also cleaning the valve seat 10 itself, thereby preventing solid impurity particles from adhering to the valve seat 10, and preventing the valve plate 9 from colliding and being damaged when the valve seat 10 is fitted and closed, thereby ensuring the stability of the sealing performance between the two. After a certain period of injection, the controller controls the air pump to stop working, and then continues to control the servo motor 5 to drive using the worm gear structure, so that the valve stem 8 can drive the valve plate 9 to cooperate with the valve seat 10 to close the inside of the valve body 1.

[0023] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. The valve seat has a purge butterfly valve, which is characterized by: The invention comprises a valve body (1), a valve seat (10) fixedly connected to the inner ring of the valve body (1), and a valve plate (9) rotatably connected to the valve body (1) and capable of being arranged in close contact with the valve seat (10); the valve seat (10) is provided with an injection hole on the end surface facing the valve plate (9); the valve body (1) is provided with a connecting groove connected to a plurality of the injection holes; the connecting groove is connected to a pump gas component.

2. The butterfly valve with valve seat purge according to claim 1, characterized in that: The air pump assembly comprises a connecting pipe (11) connected to the connecting groove, and an air pump connected to the connecting pipe (11).

3. The butterfly valve with valve seat purge according to claim 2, characterized in that: A one-way valve is fixedly connected in the jet hole, and the one-way valve guides the fluid to flow outward from the jet hole.

4. The butterfly valve with valve seat purge according to claim 3, characterized in that: The outer ring of the valve body (1) is fixedly connected to a plurality of connecting frames (6), the connecting pipe (11) is fixedly connected to an external connecting air pipe (7), the external connecting air pipe (7) is connected to a plurality of branch pipes, the branch pipes pass through the valve body (1) to the connecting groove, and the external connecting air pipe (7) is fixedly connected to the connecting frame (6).

5. The butterfly valve with valve seat purge according to claim 1, characterized in that: It also includes a valve stem (8), an angle sensor, and a controller, wherein the valve stem (8) is arranged to pass through the valve body (1), and the valve plate (9) is fixedly connected to the valve stem (8), the angle sensor is coaxially connected to the valve stem (8), and the output end of the angle sensor is coupled to the input end of the controller, and the output end of the controller is coupled to the air pump.

6. The butterfly valve with valve seat purge according to claim 5, characterized in that: It also includes a connecting seat (3) fixedly connected to the valve body (1) and communicated therewith, and a casing (4) fixedly connected to the connecting seat (3); the valve stem (8) passes through the connecting seat (3) into the casing (4); the angle sensor is fixedly connected to the inner top surface of the casing (4); a servo motor (5) is fixedly connected to the side wall of the casing (4); the output shaft of the servo motor (5) passes through the casing (4); the output shaft of the servo motor (5) is connected to the valve stem (8) via a worm gear transmission; and the servo motor (5) is coupled to a controller.

7. The seat-sweeping butterfly valve according to claim 1, characterized in that: Both end surfaces of the valve body (1) are fixedly connected with connecting flanges (2).

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