Diaphragm microvalve

Abstract

The diaphragm micro valve comprises a connecting body, a safety bolt is rotationally installed on the upper end face of the connecting body in a threaded mode, a connecting base is installed on the outer wall of the safety bolt in a threaded mode, a release head is fixedly installed on the bottom wall of the connecting body, and a conical surface seal is connected to the outer wall of the release head in a sliding mode. A guide ring is slidably mounted on the bottom wall of the connecting base through a connecting groove, a supporting column is slidably mounted in the guide ring, the upper end face of the supporting column is connected with the outer wall of the connecting base through an elastic mechanism, and a sealing body is slidably mounted on the inner wall of the connecting base through a sealing groove. Through the arrangement of the sealing body, the inner sealing ring, the position ring and other components, under the limiting of the position ring, a seal can be located at a fixed position and is prevented from moving, so that the sealing effect on the inner wall of the connecting body is achieved, the sealing effect of the sealing outer wall and the inner wall of the connecting body can be improved through the matching of the inner sealing ring, and the sealing effect is improved. Therefore, the gas can be prevented from diffusing in the connecting body.

Description

Technical Field

[0001] The utility model relates to the technical field of blocking valves, in particular to a diaphragm microvalve. Background Art

[0002] The diaphragm valve is a special form of shut-off valve. Its opening and closing parts are diaphragms made of soft materials. This diaphragm separates the inner cavity of the valve body from the inner cavity of the valve cover and the driving components, thereby achieving isolation between the inner cavity of the valve body and the inner cavity of the valve cover.

[0003] The diaphragm valve has a simple structure, good sealing and anti-corrosion properties, and low fluid resistance. It is suitable for low-pressure, low-temperature, highly corrosive media and media containing suspended matter. The pneumatic diaphragm valve consists of two interconnected valve bodies with a diaphragm in the middle. When the air source is ventilated, the air pressure in the pneumatic actuator pushes the diaphragm in one direction, causing the diaphragm between the valve bodies to shift, thereby changing the degree of opening of the valve. In the prior art, most pneumatic diaphragm valves have poor internal sealing effects during use. When the gas enters the valve body through the pores, it will diffuse inside the valve body, resulting in the inability to gather the gas, resulting in insufficient driving pressure, and thus the inability to open the valve. The diaphragm microvalve is not practical enough, so it is necessary to redesign the diaphragm microvalve to address the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a diaphragm micro valve.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The diaphragm microvalve comprises a connector, the upper end surface of the connector is threadedly rotatably mounted with a safety bolt, the outer wall of the safety bolt is threadedly mounted with a connecting seat, the bottom wall of the connector is fixedly mounted with a release head, the outer wall of the release head is slidably connected with a conical seal, the bottom wall of the connecting seat is slidably mounted with a guide ring through a connecting groove, a support column is slidably mounted inside the guide ring, the upper end surface of the support column is connected to the outer wall of the connecting seat through an elastic mechanism, a sealing body is slidably mounted on the inner wall of the connector through a sealing groove, an inner sealing ring that cooperates with the inner wall of the connector is fixedly mounted on the outer wall of the sealing body through a third mounting groove, and the outer wall of the support column is A piston plate is slidably installed on the wall, a guide telescopic column is slidably installed on the bottom wall of the support column through a positioning groove, a piston seat is slidably installed on the outer wall of the guide telescopic column, a retaining spring is slidably installed on the outer wall of the piston seat through a first retaining groove, a second retaining groove matching the retaining spring is provided on the inner wall of the positioning groove, the telescopic end of the guide telescopic column is fixedly connected to the inside of the conical seal, a piston seat is slidably installed on the outer wall of the guide telescopic column, an air seal matching the inner wall of the sealing body is slidably installed on the outer wall of the guide telescopic column through a position ring, an isolation membrane is slidably installed on the bottom wall of the connecting body, and a plurality of air holes connected to the interior are provided on the outer wall of the connecting body.

[0007] Preferably, the elastic mechanism comprises a spring installed inside the connecting body, and two ends of the spring are elastically connected to the outer wall of the connecting seat and the upper end surface of the supporting column respectively.

[0008] Preferably, a first installation groove is formed on the outer wall of the connector, and an upper sealing ring is fixedly installed inside the first installation groove.

[0009] Preferably, a second installation groove is formed on the outer wall of the connector, and a lower sealing ring is fixedly installed inside the second installation groove.

[0010] Preferably, a conical limiting groove is provided on the inner wall of the connector, and a limiting ring cooperating with the conical limiting groove is fixedly mounted on the outer wall of the guiding telescopic column.

[0011] Preferably, a face sealing ring is fixedly mounted on the outer bottom wall of the connecting body, and the face sealing ring is made of vulcanized rubber.

[0012] Beneficial effects of the utility model:

[0013] 1. By setting up components such as a sealing body, an inner sealing ring and a position ring, the seal can be kept in a fixed position under the limitation of the position ring to prevent it from moving, thereby achieving a sealing effect on the inner wall of the connector, and through the cooperation of the inner sealing ring, the sealing effect between the outer wall of the seal and the inner wall of the connector can be increased, thereby preventing gas from diffusing inside the connector.

[0014] 2. By setting up components such as an upper sealing ring, a lower sealing ring and a face sealing ring, the face sealing ring installed on the bottom wall of the connector can increase the sealing performance with the bottom wall of the valve chamber, and through the cooperation of the upper sealing ring and the lower sealing ring, the sealing performance between the outer wall of the connector and the inside of the valve chamber can be increased, thereby preventing liquid from entering the interior of the connector through the gap between the valve chamber and the connector, preventing the piston assembly inside it from getting stuck. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of the diaphragm microvalve proposed by the utility model;

[0016] Figure 2 This is a schematic diagram of the vertical cross-section structure of the diaphragm microvalve proposed by the utility model.

[0017] In the figure: 1 safety bolt, 2 connecting body, 3 upper sealing ring, 4 lower sealing ring, 5 release head, 6 cone seal, 7 guide ring, 8 support column, 9 piston seat, 10 sealing body, 11 position ring, 12 air seal, 13 limit ring, 14 isolation membrane, 15 guide telescopic column, 16 piston plate, 17 inner sealing ring, 18 spring, 19 surface sealing ring. 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] Reference Figure 1-2 The diaphragm microvalve includes a connector 2, a safety bolt 1 is rotatably installed on the upper end surface of the connector 2, a connector seat is threadedly installed on the outer wall of the safety bolt 1, a first installation groove is provided on the outer wall of the connector 2, an upper sealing ring 3 is fixedly installed inside the first installation groove, a second installation groove is provided on the outer wall of the connector 2, a lower sealing ring 4 is fixedly installed inside the second installation groove, a release head 5 is fixedly installed on the bottom wall of the connector 2, a conical seal 6 is slidably connected to the outer wall of the release head 5, a guide ring 7 is slidably installed on the bottom wall of the connector seat through the connecting groove, a support column 8 is slidably installed inside the guide ring 7, the upper end surface of the support column 8 is connected to the outer wall of the connector seat through an elastic mechanism, and the elastic mechanism includes a spring 18 installed inside the connector 2, and the two ends of the spring 18 are elastically connected to the outer wall of the connector seat and the upper end surface of the support column 8 respectively.

[0020] The inner wall of the connecting body 2 is slidably mounted with a sealing body 10 through a sealing groove, and the outer wall of the sealing body 10 is fixedly mounted with an inner sealing ring 17 that matches the inner wall of the connecting body 2 through a third mounting groove, and the outer wall of the support column 8 is slidably mounted with a piston plate 16, and the bottom wall of the support column 8 is slidably mounted with a guide telescopic column 15 through a positioning groove, and the outer wall of the guide telescopic column 15 is slidably mounted with a piston seat 9, and the outer wall of the piston seat 9 is slidably mounted with a retaining spring through a first retaining groove, and the inner wall of the positioning groove is provided with a second retaining groove that matches the retaining spring, and the telescopic end of the guide telescopic column 15 is fixedly connected to the inside of the conical seal 6, and the outer wall of the guide telescopic column 15 is slidably mounted with a piston seat 9, and the guide telescopic column An air seal 12 cooperating with the inner wall of the sealing body 10 is slidably installed on the outer wall of 15 through a position ring 11, a conical limit groove is provided on the inner wall of the connecting body 2, a limit ring 13 cooperating with the conical limit groove is fixedly installed on the outer wall of the guide telescopic column 15, an isolation membrane 14 is slidably installed on the inner bottom wall of the connecting body 2, a plurality of air holes connected with the interior are provided on the outer wall of the connecting body 2, a face sealing ring 19 is fixedly installed on the outer bottom wall of the connecting body 2, and the face sealing ring 19 is made of vulcanized rubber. Vulcanized rubber refers to vulcanized rubber, which has the characteristics of not changing viscosity and not being easy to break, and also has high elasticity, heat resistance, tensile strength and insolubility in organic solvents.

[0021] When the utility model is used, the connector 2 is first installed as a whole inside the valve cavity. The surface sealing ring 19 installed on the bottom wall of the connector 2 can increase the sealing performance with the bottom wall of the valve cavity, and the upper sealing ring 3 and the lower sealing ring 4 cooperate to increase the sealing performance between the outer wall of the connector 2 and the inside of the valve cavity. Then, the safety bolt 1 can be rotated and removed from the upper end surface of the connector 2, thereby releasing the lock on the connector seat. At this time, the spring 18 is in a tensioned state, and under the elastic action of the spring 18, the guide telescopic column 15 can drive the conical surface seal 6 to move downward, thereby allowing the conical surface seal 6 to squeeze and seal the outlet inside the valve cavity, thereby achieving liquid blocking.

[0022] When the liquid needs to be conducted, air gas can enter the valve cavity. With the cooperation of the upper sealing ring 3 and the lower sealing ring 4, the gas can enter the connector 2 through multiple air holes. When the gas is inside the connector 2, the cooperation of the sealing body 10 and the inner sealing ring 17 can prevent the gas from diffusing. At this time, under the action of the gas pressure, the piston plate 16 can slide on the outer wall of the support column 8 and squeeze the support column 8. At this time, the support column 8 is subjected to force and can drive the guide telescopic column 15 to move through the cooperation of the piston seat 9, and squeeze the spring 18 in the process. As the guide telescopic column 15 moves, it can drive the conical surface seal 6 moves to the outer wall of the release head 5, at which time the conical seal 6 can release the seal on the internal outlet of the valve cavity, thereby releasing the blockage of the liquid and allowing the liquid to flow out through the internal outlet of the valve cavity. When the gas stops and the pressure is insufficient, the spring 18 can release the elastic potential energy to move the support column 8 to reset, and the support column 8 drives the conical seal 6 to squeeze and seal the internal outlet of the valve cavity again through the guide telescopic column 15, and in this process, the movement stroke of the support column 8 can be limited by the cooperation of the position ring 11 and the limit ring 13, and the guide telescopic column 15 can drive the limit ring 13 to fit with the inner wall of the conical limit groove.

[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. A diaphragm microvalve, comprising a connector (2), characterized in that: The upper end surface of the connecting body (2) is threadedly mounted with a safety bolt (1), the outer wall of the safety bolt (1) is threadedly mounted with a connecting seat, the bottom wall of the connecting body (2) is fixedly mounted with a release head (5), the outer wall of the release head (5) is slidably connected with a conical seal (6), the bottom wall of the connecting seat is slidably mounted with a guide ring (7) through a connecting groove, a support column (8) is slidably mounted inside the guide ring (7), the upper end surface of the support column (8) is connected to the outer wall of the connecting seat through an elastic mechanism, the inner wall of the connecting body (2) is slidably mounted with a sealing body (10) through a sealing groove, the outer wall of the sealing body (10) is fixedly mounted with an inner sealing ring (17) that matches the inner wall of the connecting body (2) through a third mounting groove, and the outer wall of the support column (8) is slidably mounted with a piston plate (16), the bottom wall of the support column (8) is slidably mounted with a guide telescopic column (15) through a positioning groove, the outer wall of the guide telescopic column (15) is slidably mounted with a piston seat (9), the outer wall of the piston seat (9) is slidably mounted with a retaining spring through a first retaining groove, the inner wall of the positioning groove is provided with a second retaining groove that cooperates with the retaining spring, the telescopic end of the guide telescopic column (15) is fixedly connected to the inside of the conical seal (6), the outer wall of the guide telescopic column (15) is slidably mounted with a piston seat (9), the outer wall of the guide telescopic column (15) is slidably mounted with an air seal (12) that cooperates with the inner wall of the sealing body (10) through a position ring (11), the inner bottom wall of the connecting body (2) is slidably mounted with an isolation membrane (14), and the outer wall of the connecting body (2) is provided with a plurality of air holes that are connected to the inside.

2. The diaphragm microvalve according to claim 1, characterized in that: The elastic mechanism comprises a spring (18) installed inside the connecting body (2), and two ends of the spring (18) are elastically connected to the outer wall of the connecting seat and the upper end surface of the supporting column (8) respectively.

3. The diaphragm microvalve according to claim 2, characterized in that: The outer wall of the connecting body (2) is provided with a first installation groove, and an upper sealing ring (3) is fixedly installed inside the first installation groove.

4. The diaphragm microvalve according to claim 3, characterized in that: The outer wall of the connecting body (2) is provided with a second installation groove, and a lower sealing ring (4) is fixedly installed inside the second installation groove.

5. The diaphragm microvalve according to claim 4, characterized in that: The inner wall of the connecting body (2) is provided with a conical limiting groove, and the outer wall of the guiding telescopic column (15) is fixedly mounted with a limiting ring (13) that cooperates with the conical limiting groove.

6. The diaphragm microvalve according to claim 5, characterized in that: A surface sealing ring (19) is fixedly mounted on the outer bottom wall of the connecting body (2), and the surface sealing ring (19) is made of vulcanized rubber.

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