Pneumatic diaphragm regulating valve with high sealing performance

Abstract

The utility model discloses a pneumatic diaphragm regulating valve with strong sealing performance, which comprises a regulating valve body, a valve core sealing sleeve is fixedly arranged on the outer side of a valve core in the regulating valve body, a flange sealing washer is arranged in a flange on the side surface of the regulating valve body, a valve cover is fixedly arranged on the upper surface of the regulating valve body through a bolt, and a valve core is arranged in the valve cover. A support is fixedly installed on the upper surface of the valve deck, a positioner is fixedly installed on the outer side of the support, and a pneumatic film actuator is fixedly installed at the upper end of the support. According to the pneumatic diaphragm regulating valve with the high sealing performance, multi-layer sealing is formed between the valve seat and the valve element of the pneumatic diaphragm regulating valve through the valve element sealing sleeve, the sealing effect is better, insertion of the valve element into the valve seat is not affected, after the pneumatic diaphragm regulating valve is installed, the pneumatic diaphragm regulating valve is better attached to the surface of a flange plate through the flange sealing gasket, and the sealing effect is better. And in addition, after the pneumatic diaphragm regulating valve is dismounted, the flange sealing washer cannot fall onto the ground.

Description

Technical Field

[0001] This utility model relates to the technical field of pneumatic diaphragm regulating valve structure, and in particular to a pneumatic diaphragm regulating valve with strong sealing performance. Background Technology

[0002] A pneumatic diaphragm control valve typically consists of two parts: a pneumatic actuator and a valve body. The pneumatic actuator receives a control signal and generates thrust or pull force, which is transmitted to the valve core through a push rod or other mechanism, thereby changing the valve opening. The valve body contains components such as the fluid passage and valve seat, ensuring that the fluid flows according to the set parameters. Pneumatic diaphragm control valves can be classified into various types according to their structure, function, and application. Structurally, they mainly include straight-through single-seat, straight-through double-seat, angle, and three-way types. The working principle of a pneumatic diaphragm control valve is based on the movement of the pneumatic actuator and the relative position change between the valve core and valve seat. When a control signal is applied to the pneumatic actuator, the actuator generates thrust or pull force, pushing the valve core to move within the valve body. The movement of the valve core changes the size of the fluid passage, thereby regulating the flow rate. By adjusting the magnitude and direction of the control signal, the valve opening and parameters such as flow rate and pressure can be precisely controlled.

[0003] The main sealing locations of pneumatic diaphragm control valves are between the valve flange and the pipe flange, and between the valve seat and the valve core. In the existing technology, the valve flange and the pipe flange are sealed by a flange gasket, and the valve seat and the valve core are sealed by a rubber sleeve. This sealing method has several problems: First, the sealing structure between the valve seat and the valve core is simple, and a seal cannot be achieved if the valve core is not fully inserted into the valve seat; second, the flange gasket is too thin and cannot fit the surface of the valve flange well. Utility Model Content

[0004] The main objective of this invention is to provide a pneumatic diaphragm regulating valve with strong sealing performance, which can effectively solve the problems in the background art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] A pneumatic diaphragm control valve with strong sealing performance includes a control valve body. A valve core sealing sleeve is fixedly installed on the outside of the valve core inside the control valve body. A flange sealing gasket is provided inside the side flange of the control valve body. A valve cover is fixedly installed on the upper surface of the control valve body by bolts. A bracket is fixedly installed on the upper surface of the valve cover. A positioner is fixedly installed on the outside of the bracket. A pneumatic diaphragm actuator is fixedly installed at the upper end of the bracket. An exhaust port is provided at the center of the upper surface of the pneumatic diaphragm actuator.

[0007] Preferably, the valve core sealing sleeve includes a rubber sleeve, a horn-shaped rubber ring, a rubber ring, a No. 1 sponge ring, and a pressure plate.

[0008] Preferably, the rubber sleeve is fixedly installed on the outside of the valve core inside the regulating valve body, the horn rubber ring is fixedly installed on the outside of the rubber sleeve, the rubber ring is fixedly installed on the upper surface of the rubber sleeve, and there are several horn rubber rings installed, which are evenly distributed on the outside of the rubber sleeve.

[0009] Preferably, the first sponge ring is fixedly installed on the upper surface of the rubber ring, the pressure plate is fixedly installed on the surface of the first sponge ring, and the pressure plate is fixedly connected to the valve stem of the regulating valve body.

[0010] Preferably, the flange sealing gasket includes a rubber ring sleeve, a rubber inner ring, an embedded circular ring, and a second sponge ring.

[0011] Preferably, the inner rubber ring is fixedly installed on the inner side of the rubber ring sleeve. The front and rear surfaces of the rubber ring sleeve are provided with annular grooves, and the outer side of the inner rubber ring is provided with annular grooves. There are a number of annular grooves on the front and rear surfaces of the rubber ring sleeve and a number of annular grooves on the outer side of the inner rubber ring. The annular grooves on the front and rear surfaces of the rubber ring sleeve and the annular grooves on the outer side of the inner rubber ring are evenly distributed.

[0012] Preferably, the embedded ring is fixedly installed on the inner side of the rubber inner ring, and the second sponge ring is located inside the rubber ring sleeve.

[0013] This utility model, through the setting of the valve core sealing sleeve, enables the valve seat and valve core of the pneumatic diaphragm regulating valve to form a multi-layer seal, resulting in a better sealing effect without affecting the insertion of the valve core into the valve seat.

[0014] With the addition of a flange sealing gasket, the flange sealing gasket fits more closely to the surface of the flange after the pneumatic diaphragm control valve is installed, resulting in a stronger seal. Furthermore, the flange sealing gasket will not fall to the ground after the pneumatic diaphragm control valve is removed. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a pneumatic diaphragm regulating valve with strong sealing performance according to this utility model.

[0016] Figure 2 This is a schematic diagram of the valve core sealing sleeve structure of a pneumatic diaphragm regulating valve with strong sealing performance according to this utility model.

[0017] Figure 3 This utility model relates to a pneumatic diaphragm regulating valve with strong sealing performance. Figure 2 Enlarged diagram of part A in the middle;

[0018] Figure 4 This is an exploded view of the valve core sealing sleeve structure of a pneumatic diaphragm regulating valve with strong sealing performance according to this utility model.

[0019] Figure 5 This is an exploded view of the flange sealing gasket structure of a pneumatic diaphragm regulating valve with strong sealing performance according to this utility model.

[0020] In the diagram: 1. Control valve body; 2. Valve core sealing sleeve; 201. Rubber sleeve; 202. Horn rubber ring; 203. Rubber ring; 204. No. 1 sponge ring; 205. Pressure plate; 3. Flange sealing gasket; 301. Rubber ring sleeve; 302. Rubber inner ring; 303. Embedded ring; 304. No. 2 sponge ring; 4. Valve cover; 5. Bracket; 6. Positioner; 7. Pneumatic diaphragm actuator; 8. Exhaust port. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1-5 As shown, a pneumatic diaphragm control valve with strong sealing performance includes a control valve body 1. A valve core sealing sleeve 2 is fixedly installed on the outside of the valve core inside the control valve body 1. A flange sealing gasket 3 is provided inside the side flange of the control valve body 1. A valve cover 4 is fixedly installed on the upper surface of the control valve body 1 by bolts. A bracket 5 is fixedly installed on the upper surface of the valve cover 4. A positioner 6 is fixedly installed on the outside of the bracket 5. A pneumatic diaphragm actuator 7 is fixedly installed at the upper end of the bracket 5. An exhaust port 8 is provided at the center of the upper surface of the pneumatic diaphragm actuator 7. The valve core sealing sleeve 2 forms a multi-layer seal between the valve seat and the valve core of the pneumatic diaphragm control valve, resulting in a better sealing effect and without affecting the insertion of the valve core into the valve seat. After the pneumatic diaphragm control valve is installed, the flange sealing gasket 3 fits the surface of the flange more closely, resulting in stronger sealing performance. Furthermore, the flange sealing gasket 3 will not fall to the ground after the pneumatic diaphragm control valve is removed.

[0023] In this embodiment, the valve core sealing sleeve 2 includes a rubber sleeve 201, a horn rubber ring 202, a rubber ring 203, a first sponge ring 204, and a pressure plate 205.

[0024] In this embodiment, the rubber sleeve 201 is fixedly installed on the outside of the valve core inside the regulating valve body 1, the horn rubber ring 202 is fixedly installed on the outside of the rubber sleeve 201, the rubber ring 203 is fixedly installed on the upper surface of the rubber sleeve 201, and there are several horn rubber rings 202 installed. The horn rubber rings 202 are evenly distributed on the outside of the rubber sleeve 201. When the valve core of the regulating valve body 1 is inserted into the valve seat, the horn rubber rings 202 make the valve core of the regulating valve body 1 and the valve seat form a multi-layer seal.

[0025] In this embodiment, the first sponge ring 204 is fixedly installed on the upper surface of the rubber ring 203, and the pressure plate 205 is fixedly installed on the surface of the first sponge ring 204. The pressure plate 205 is fixedly connected to the valve stem of the regulating valve body 1. When the valve core of the regulating valve body 1 is inserted into the valve seat, the rubber ring 203 adheres to the surface of the regulating valve body 1 valve seat, and the pressure plate 205 presses down, making the rubber ring 203 adhere more closely to the surface of the regulating valve body 1 valve seat.

[0026] In this embodiment, the flange sealing gasket 3 includes a rubber ring 301, a rubber inner ring 302, an embedded ring 303, and a second sponge ring 304.

[0027] In this embodiment, the inner rubber ring 302 is fixedly installed on the inner side of the rubber ring sleeve 301. Annular grooves are formed on the front and rear surfaces of the rubber ring sleeve 301, and an annular groove is formed on the outer side of the inner rubber ring 302. The number of annular grooves on the front and rear surfaces of the rubber ring sleeve 301 and the number of annular grooves on the outer side of the inner rubber ring 302 are both uniformly distributed. The annular grooves on the outer side of the inner rubber ring 302 increase friction, while the annular grooves on the front and rear surfaces of the rubber ring sleeve 301 enhance the sealing effect.

[0028] In this embodiment, the embedded ring 303 is fixedly installed on the inner side of the rubber inner ring 302, and the second sponge ring 304 is disposed inside the rubber ring sleeve 301. The embedded ring 303 makes it easier for the flange sealing gasket 3 to be inserted into the inner side of the flange of the regulating valve body 1, and the second sponge ring 304 makes the rubber ring sleeve 301 fit the flange surface better.

[0029] The scope of protection of this utility model is not limited to the above embodiments and their variations. Conventional modifications and substitutions made by those skilled in the art based on the content of these embodiments are all within the scope of protection of this utility model.

Claims

1. A pneumatic diaphragm regulating valve with strong sealing performance, characterized in that: The valve body includes a regulating valve body (1), a valve core sealing sleeve (2) is fixedly installed on the outside of the valve core inside the regulating valve body (1), a flange sealing gasket (3) is provided inside the side flange of the regulating valve body (1), a valve cover (4) is fixedly installed on the upper surface of the regulating valve body (1) by bolts, a bracket (5) is fixedly installed on the upper surface of the valve cover (4), a positioner (6) is fixedly installed on the outside of the bracket (5), a pneumatic diaphragm actuator (7) is fixedly installed at the upper end of the bracket (5), and an exhaust port (8) is provided at the center of the upper surface of the pneumatic diaphragm actuator (7). The valve core sealing sleeve (2) includes a rubber sleeve (201), a horn rubber ring (202), a rubber ring (203), a No. 1 sponge ring (204), and a pressure plate (205). The rubber sleeve (201) is fixedly installed on the outside of the valve core inside the regulating valve body (1). The horn rubber ring (202) is fixedly installed on the outside of the rubber sleeve (201). The rubber ring (203) is fixedly installed on the upper surface of the rubber sleeve (201). There are several horn rubber rings (202) installed. The horn rubber rings (202) are evenly distributed on the outside of the rubber sleeve (201).

2. The pneumatic diaphragm regulating valve with strong sealing performance according to claim 1, characterized in that: The first sponge ring (204) is fixedly installed on the upper surface of the rubber ring (203), the pressure plate (205) is fixedly installed on the surface of the first sponge ring (204), and the pressure plate (205) is fixedly connected to the valve stem of the regulating valve body (1).

3. The pneumatic diaphragm regulating valve with strong sealing performance according to claim 2, characterized in that: The flange sealing gasket (3) includes a rubber ring sleeve (301), a rubber inner ring (302), an embedded ring (303), and a second sponge ring (304).

4. A pneumatic diaphragm regulating valve with strong sealing performance according to claim 3, characterized in that: The inner rubber ring (302) is fixedly installed on the inner side of the rubber ring sleeve (301). The front and rear surfaces of the rubber ring sleeve (301) are provided with annular grooves, and the outer side of the inner rubber ring (302) is provided with annular grooves. There are several annular grooves on the front and rear surfaces of the rubber ring sleeve (301) and several annular grooves on the outer side of the inner rubber ring (302). The annular grooves on the front and rear surfaces of the rubber ring sleeve (301) are evenly distributed, and the annular grooves on the outer side of the inner rubber ring (302) are evenly distributed.

5. A pneumatic diaphragm regulating valve with strong sealing performance according to claim 4, characterized in that: The embedded ring (303) is fixedly installed on the inner side of the rubber inner ring (302), and the second sponge ring (304) is located inside the rubber ring sleeve (301).

Images