Pneumatic control valve with high sealing performance

Abstract

The utility model relates to the field of pneumatic control valves, and particularly discloses a high-sealing-performance pneumatic control valve which comprises a valve body, a pneumatic execution component, a limiting pipe and a sealing plug block. A liquid inlet is formed in one end of the valve body, a liquid outlet is formed in the other end of the valve body, flanges are arranged on the liquid inlet and the liquid outlet, the pneumatic execution component is arranged on the top of the side, close to the liquid outlet, of the valve body, the air pump connecting pipe is arranged on the top of the pneumatic execution component, and the limiting pipe is arranged at the bottom of the pneumatic execution component. The pneumatic pipe is arranged at the bottom of the limiting pipe, the top of the pneumatic pipe is connected with the limiting pipe, the bottom of the pneumatic pipe is connected to the valve body, the pneumatic pipe is communicated with the interior of the valve body, the pneumatic pipe is communicated with the interior of the limiting pipe, and the sealing plug block is arranged in the valve body. According to the pneumatic control valve with the high sealing performance, the influence of the valve body on the water flow speed is reduced, and the sealing performance of the valve body is high.

Description

Technical Field

[0001] The utility model relates to the field of pneumatic control valves, and particularly to a pneumatic control valve with high sealing performance. Background Technique

[0002] Generally, a switching valve forms a switching effect by rotating or sucking a valve ball, and such switching valves all have certain inconveniences. For example, the switching speed of a rotary ball valve is slow and cannot meet special working environments, while the working environment requirements of an electromagnetic switching valve are relatively high and it is not easy to use. To improve this situation, a pneumatic valve appears.

[0003] During the use of the existing pneumatic control valve, due to the angle of the internal pipeline of the valve body, there is resistance to the water flow, reducing the water flow speed. And the existing pneumatic control valve has low sealing performance during use. Therefore, a pneumatic control valve with high sealing performance is proposed. Content of the Utility Model

[0004] The purpose of the utility model is to provide a pneumatic control valve with high sealing performance to solve the problems raised in the above background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A pneumatic control valve with high sealing performance, including a valve body, a pneumatic actuator, a limit pipe, and a sealing plug; a liquid inlet is arranged at one end of the valve body, a liquid outlet is arranged at the other end of the valve body, flanges are arranged on the liquid inlet and the liquid outlet, a pneumatic actuator is arranged on the top of the side of the valve body close to the liquid outlet, an air pump connecting pipe is arranged on the top of the pneumatic actuator, the limit pipe is arranged at the bottom of the pneumatic actuator, a pneumatic pipe is arranged at the bottom of the limit pipe, the top of the pneumatic pipe is connected to the limit pipe, and the bottom of the pneumatic pipe is connected to the valve body. The pneumatic pipe is internally communicated with the valve body, and the pneumatic pipe is internally communicated with the limit pipe. The sealing plug is arranged inside the valve body.

[0006] Preferably, a structural plate is arranged on the valve body near the pneumatic pipe, a support rod is arranged on the structural plate, the bottom of the support rod is fixed on the structural plate, and the top of the support rod is connected to the bottom of the pneumatic actuator. The structural plate and the support rod provide support for the pneumatic actuator.

[0007] Preferably, a sealing arc surface is arranged on the sealing plug, and the sealing arc surface is consistent with the internal structure of the valve body. A limit sealing convex block is arranged on the sealing plug. The sealing arc surface improves the continuity of the water flow inside the valve body, reduces the water flow resistance, and increases the water flow speed.

[0008] Preferably, arc surfaces are arranged on the top and bottom of the limit sealing convex block, and the arc surfaces are consistent with the arc surfaces of the internal pipelines of the valve body. The arc surfaces fit on the inner wall of the valve body pipeline to play a sealing role, and the limit sealing convex block also limits the position of the sealing plug.

[0009] Preferably, a pneumatic rod is provided on the top of the sealing plug. The pneumatic rod is arranged inside a pneumatic tube. A limiting plate is provided on the top of the pneumatic rod. The limiting plate is arranged inside a limiting tube. The movement range of the sealing plug is limited by the limiting plate. A connecting rod is provided on the top of the limiting plate. The connecting rod is connected to a pneumatic actuator. The pneumatic actuator drives the sealing plug to move through the connecting rod.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: When water flows through the valve body, the set sealing arc surface reduces the water flow resistance and the speed loss of the water flow passing through the inside of the valve body; The pneumatic actuator drives the sealing plug to move to seal the pipeline inside the valve body, thereby closing the pipeline valve. The set limiting and sealing convex block strengthens the bottom of the sealing plug to improve the sealing performance of the sealing plug; The set limiting plate limits the moving position of the sealing plug. Description of the Drawings

[0011] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0012] Figure 2 is a schematic diagram of the internal structure of the present utility model;

[0013] Figure 3 is a schematic diagram of the sealing structure of the present utility model;

[0014] Reference numerals in the figures: 1, valve body; 11, liquid inlet; 12, liquid outlet; 13, flange; 2, pneumatic actuator; 21, structural plate; 22, support rod; 23, air pump connecting pipe; 3, limiting tube; 31, pneumatic tube; 4, sealing plug; 41, sealing arc surface; 42, limiting and sealing convex block; 43, pneumatic rod; 44, limiting plate; 45, connecting rod. Detailed Embodiments

[0015] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0016] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "vertical", "upper", "lower", "horizontal", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0017] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0018] Please refer to Figures 1-3 , the present utility model provides a technical solution: a pneumatic control valve with high sealing performance, including a valve body 1, a pneumatic actuator 2, a limit pipe 3, and a sealing plug 4; one end of the valve body 1 is provided with a liquid inlet 11, the other end of the valve body 1 is provided with a liquid outlet 12, flanges 13 are provided on the liquid inlet 11 and the liquid outlet 12, a pneumatic actuator 2 is provided on the top of the side of the valve body 1 near the liquid outlet 12, a gas pump connecting pipe 23 is provided on the top of the pneumatic actuator 2, the limit pipe 3 is arranged at the bottom of the pneumatic actuator 2, a pneumatic pipe 31 is provided at the bottom of the limit pipe 3, the top of the pneumatic pipe 31 is connected to the limit pipe 3, the bottom of the pneumatic pipe 31 is connected to the valve body 1, the pneumatic pipe 31 is internally communicated with the valve body 1, the pneumatic pipe 31 is internally communicated with the limit pipe 3, and the sealing plug 4 is arranged inside the valve body 1.

[0019] Furthermore, a structural plate 21 is provided on the valve body 1 near the pneumatic pipe 31, a support rod 22 is provided on the structural plate 21, the bottom of the support rod 22 is fixed on the structural plate 21, the top of the support rod 22 is connected to the bottom of the pneumatic actuator 2, and the structural plate 21 and the support rod 22 provide support for the pneumatic actuator 2.

[0020] Furthermore, a sealing arc surface 41 is provided on the sealing plug 4, the sealing arc surface 41 is consistent with the internal structure of the valve body 1, a limit sealing convex block 42 is provided on the sealing plug 4, and the sealing arc surface 41 improves the coherence of the water flow inside the valve body 1, reduces the water flow resistance, and increases the water flow speed.

[0021] Further, arc surfaces are provided on the top and bottom of the limit sealing bump 42, and the arc surfaces are consistent with the arc surfaces of the internal pipeline of the valve body 1. The arc surfaces are attached to the inner wall of the pipeline of the valve body 1 to play a sealing role, and the limit sealing bump 42 also limits the position of the sealing plug 4.

[0022] Further, a pneumatic rod 43 is provided on the top of the sealing plug 4. The pneumatic rod 43 is arranged inside the pneumatic pipe 31. A limit plate 44 is provided on the top of the pneumatic rod 43. The limit plate 44 is arranged inside the limit pipe 3. The moving range of the sealing plug 4 is limited by the limit plate 44. A connecting rod 45 is provided on the top of the limit plate 44. The connecting rod 45 is connected to the pneumatic actuator 2. The pneumatic actuator 2 drives the sealing plug 4 to move through the connecting rod 45.

[0023] Working principle: The liquid inlet 11 and the liquid outlet 12 are connected to the water pipe through the flange 13. Water flows into the valve body 1. The sealing arc surface 41 reduces the resistance of the water flowing through the valve body 1 and reduces the loss of the water flow velocity. The pneumatic actuator 2 drives the connecting rod 45 to move, so that the sealing plug 4 moves downward. The whole sealing plug 4 moves downward to block the internal pipeline of the valve body 1. The limit sealing bump 42 is provided to seal and reinforce the bottom of the sealing plug 4 to improve the sealing performance. The moving position of the sealing plug 4 is limited by the limit plate 44.

[0024] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pneumatic control valve with high sealing performance, characterized in that: The invention comprises a valve body (1), a pneumatic actuator (2), a limit tube (3), and a sealing block (4); a liquid inlet (11) is arranged at one end of the valve body (1), a liquid outlet (12) is arranged at the other end of the valve body (1), flanges (13) are arranged on the liquid inlet (11) and the liquid outlet (12), a pneumatic actuator (2) is arranged on the top of one side of the valve body (1) close to the liquid outlet (12), and a flange (13) is arranged on the top of the pneumatic actuator (2). An air pump connecting pipe (23), the limiting pipe (3) is arranged at the bottom of the pneumatic actuator (2), a pneumatic pipe (31) is arranged on the bottom of the limiting pipe (3), the top of the pneumatic pipe (31) is connected to the limiting pipe (3), the bottom of the pneumatic pipe (31) is connected to the valve body (1), the pneumatic pipe (31) is connected to the inside of the valve body (1), the pneumatic pipe (31) is connected to the inside of the limiting pipe (3), and the sealing block (4) is arranged inside the valve body (1).

2. A pneumatic control valve with high sealing performance according to claim 1, characterized in that: A structural plate (21) is arranged on the valve body (1) near the pneumatic tube (31), and a support rod (22) is arranged on the structural plate (21). The bottom of the support rod (22) is fixed on the structural plate (21), and the top of the support rod (22) is connected to the bottom of the pneumatic actuator (2).

3. A pneumatic control valve with high sealing performance according to claim 1, characterized in that: The sealing block (4) is provided with a sealing arc surface (41), the sealing arc surface (41) and the internal structure of the valve body (1) are consistent, and the sealing block (4) is provided with a limited position sealing protrusion (42).

4. A pneumatic control valve with high sealing performance according to claim 3, characterized in that: The top and bottom of the position-limiting sealing protrusion (42) are provided with arc surfaces, and the arc surfaces are consistent with the arc surfaces of the pipeline inside the valve body (1).

5. The pneumatic control valve with high sealing performance according to claim 1, characterized in that: A pneumatic rod (43) is arranged on the top of the sealing block (4), and the pneumatic rod (43) is arranged inside the pneumatic tube (31). A limiting plate (44) is arranged on the top of the pneumatic rod (43), and the limiting plate (44) is arranged inside the limiting tube (3). A connecting rod (45) is arranged on the top of the limiting plate (44), and the connecting rod (45) is connected to the pneumatic actuator (2).

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