Pneumatic diaphragm valve driving mechanism

Abstract

The utility model relates to the technical field of pneumatic diaphragm valves, in particular to a pneumatic diaphragm valve driving mechanism which comprises a pneumatic driving mechanism, the pneumatic driving mechanism comprises a gas tank, a tank cover, a diaphragm and a gas supplementing mechanism, the diaphragm is arranged at the top in the gas tank, and the periphery of the diaphragm is fixed to the inner wall of the gas tank in an adhesive mode. The tank cover is connected with the top of the gas tank through a flange, and one side of the gas tank is connected with an exhaust connector used for supplying gas to drive the pneumatic diaphragm valve. A pneumatic driving mechanism with high use safety is provided for the pneumatic diaphragm valve through an assembly composed of an air tank, a tank cover, a diaphragm and an air supplementing mechanism, and air used for driving the pneumatic diaphragm valve to operate is kept isolated from outside air, so that the cleanliness of the air used for driving the pneumatic diaphragm valve to operate is guaranteed, and the service life of the pneumatic diaphragm valve is prolonged. The cleanliness of the environment of the pneumatic execution end of the inner cavity of the pneumatic diaphragm valve is guaranteed, and the service life of the pneumatic diaphragm valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of pneumatic diaphragm valves, and particularly relates to a driving mechanism for a pneumatic diaphragm valve. Background Art

[0002] Pneumatic diaphragm valves are widely used, mainly for controlling the flow and pressure of gases, liquids and corrosive media. They are particularly prominent in fields such as semiconductor manufacturing, biopharmaceuticals, food processing and environmental protection water treatment, and are an important part of industrial process automatic control.

[0003] In the existing air supply mechanism for driving a pneumatic diaphragm valve, the driving air entering the pneumatic diaphragm valve is prone to carrying impurities, resulting in relatively large wear during the up and down operation of the pneumatic actuator in the pneumatic diaphragm valve, and affecting the service life of the pneumatic diaphragm valve. Therefore, a driving mechanism for a pneumatic diaphragm valve is proposed to provide a pneumatic driving mechanism with high use safety for the pneumatic diaphragm valve, ensure that the air used to drive the pneumatic diaphragm valve is isolated from the outside world, keep it clean, ensure the safety and reliability of the pneumatic driving mechanism during use, ensure the cleanliness of the air and the tightness of the system, reduce the entry of impurities and pollutants, and thus extend the service life of the pneumatic diaphragm valve. Summary of the Utility Model

[0004] Aiming at the problems in the prior art, the utility model provides a driving mechanism for a pneumatic diaphragm valve to provide a pneumatic driving mechanism with high use safety for the pneumatic diaphragm valve, ensure that the air used to drive the pneumatic diaphragm valve is isolated from the outside world, keep it clean, ensure the safety and reliability of the pneumatic driving mechanism during use, ensure the cleanliness of the air and the tightness of the system, reduce the entry of impurities and pollutants, and thus extend the service life of the pneumatic diaphragm valve.

[0005] The technical solution adopted by the utility model to solve its technical problems is a driving mechanism for a pneumatic diaphragm valve, including a pneumatic driving mechanism. The pneumatic driving mechanism includes an air tank, a tank cover, a diaphragm and a gas supplementing mechanism. The diaphragm is arranged at the inner top of the air tank, and the outer periphery of the diaphragm is adhesively fixed to the inner wall of the air tank. The tank cover is connected to the top of the air tank through a flange. One side of the air tank is connected with an exhaust joint for supplying air to drive the pneumatic diaphragm valve.

[0006] By adopting the above technical solution, a component composed of an air tank, a tank cover, a diaphragm and a gas supplementing mechanism is used to realize providing a pneumatic driving mechanism with high use safety for the pneumatic diaphragm valve, and the air used to drive the pneumatic diaphragm valve to operate is kept isolated from the outside air, so as to ensure the cleanliness of the air used to drive the pneumatic diaphragm valve to operate, ensure the cleanliness of the pneumatic actuator end environment in the inner cavity of the pneumatic diaphragm valve, and improve the service life of the pneumatic diaphragm valve.

[0007] Specifically, an air pump and an electromagnetic three-way valve are installed on the top of the tank cover. The exhaust end of the air pump is connected to one set of interfaces of the electromagnetic three-way valve through a pipeline, and one of the other two sets of interfaces of the electromagnetic three-way valve is connected to the tank cover.

[0008] By adopting the above technical solution, the air pump pressurizes the environment between the tank cover and the diaphragm, causing the diaphragm to be pressured and pressurizing the bottom of the air tank, so that the air at the bottom of the air tank supplies air to the pneumatic diaphragm valve.

[0009] Specifically, the air supplement mechanism is arranged on the other side of the air tank. The air supplement mechanism includes an air inlet joint and a check valve component. The air inlet end of the check valve component is connected to the exhaust end of the air inlet joint, and the exhaust end of the check valve component is connected to the air tank.

[0010] By adopting the above technical solution, the air supplement mechanism supplements air to the bottom of the air tank to continuously ensure the air pressure at the bottom of the air tank.

[0011] Specifically, a metal filter mesh is welded inside the air inlet end of the air inlet joint.

[0012] By adopting the above technical solution, the metal filter mesh filters the gas passing through the air inlet joint to ensure the cleanliness of the air supplemented into the air tank.

[0013] Specifically, the check valve component includes a connecting sleeve. A cover plate is arranged at the exhaust end inside the connecting sleeve. Support blocks integral with it are equidistantly arranged on the inner circumference of the exhaust end of the connecting sleeve. A spring is arranged between the support block and the cover plate. Both ends of the spring are connected to the support block and the cover plate, and the diameter of the cover plate is larger than the diameter of the through hole of the connecting sleeve.

[0014] By adopting the above technical solution, the check valve component enables the air supplement mechanism to only intake air unidirectionally.

[0015] The beneficial effects of the present utility model: The assembly composed of the air tank, the tank cover, the diaphragm and the air supplement mechanism realizes providing a pneumatic driving mechanism with high use safety for the pneumatic diaphragm valve, and the air used to drive the pneumatic diaphragm valve operates while being kept isolated from the outside air, thereby ensuring the cleanliness of the air used to drive the pneumatic diaphragm valve, ensuring the cleanliness of the pneumatic execution end environment inside the pneumatic diaphragm valve, improving the service life of the pneumatic diaphragm valve. The whole pneumatic driving mechanism adopts a sealed design to ensure that the air used to drive the pneumatic diaphragm valve is isolated from the outside and remains clean, ensuring the safety and reliability of the pneumatic driving mechanism during use. Since the cleanliness of the air and the tightness of the system are ensured, the entry of impurities and pollutants is reduced, thereby prolonging the service life of the pneumatic diaphragm valve, and solving the problem that in the existing air supply mechanism for driving the pneumatic diaphragm valve, the driving air entering the pneumatic diaphragm valve is easy to carry impurities, resulting in large wear during the up and down operation of the pneumatic actuator inside the pneumatic diaphragm valve, and affecting the service life of the pneumatic diaphragm valve. Brief Description of the Drawings

[0016] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0017] Figure 1 is the overall schematic diagram of the present utility model;

[0018] Figure 2 is the schematic diagram of the can lid opening of the present utility model;

[0019] Figure 3 is the schematic diagram of the air supplement mechanism of the present utility model;

[0020] Figure 4 is the schematic side cross-sectional view of the check valve member of the present utility model;

[0021] In the figure: 1, pneumatic drive mechanism; 11, air tank; 12, can lid; 13, diaphragm; 14, air pump; 15, electromagnetic three-way valve; 16, exhaust joint; 17, air supplement mechanism; 171, intake joint; 172, check valve member; 1721, connecting sleeve; 1722, cover plate; 1723, support block; 1724, spring; 173, metal filter mesh sheet. Detailed Description of the Preferred Embodiments

[0022] In order to make the technical means, creative features, achieved purposes and functions of the present utility model easy to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0023] In order to improve the service life of the pneumatic diaphragm valve, as Figures 1-4 shown, a pneumatic diaphragm valve drive mechanism of the present utility model includes a pneumatic drive mechanism 1, and the pneumatic drive mechanism 1 includes an air tank 11, a can lid 12, a diaphragm 13 and an air supplement mechanism 17. The diaphragm 13 is arranged at the inner top of the air tank 11, and the outer periphery of the diaphragm 13 is adhesively fixed to the inner wall of the air tank 11. The can lid 12 is connected to the top of the air tank 11 through a flange. One side of the air tank 11 is connected with an exhaust joint 16 for supplying air to drive the pneumatic diaphragm valve.

[0024] During use, the air tank 11, the can lid 12, the diaphragm 13 and the air supplement mechanism 17 are used to provide a pneumatic drive mechanism with high use safety for the pneumatic diaphragm valve, and the air used to drive the pneumatic diaphragm valve is kept isolated from the outside air, so as to ensure the cleanliness of the air used to drive the pneumatic diaphragm valve and the cleanliness of the pneumatic execution end environment in the inner cavity of the pneumatic diaphragm valve, and improve the service life of the pneumatic diaphragm valve.

[0025] The utility model also includes that an air pump 14 and an electromagnetic three-way valve 15 are installed on the top of the tank cover 12, the exhaust end of the air pump 14 is connected to one group of interfaces of the electromagnetic three-way valve 15 through a pipeline, and one of the other two groups of interfaces of the electromagnetic three-way valve 15 is connected to the tank cover 12.

[0026] The air replenishing mechanism 17 is arranged on the other side of the gas tank 11, and the air replenishing mechanism 17 includes an air inlet connector 171 and a one-way valve component 172, the air inlet end of the one-way valve component 172 is connected to the exhaust end of the air inlet connector 171, and the exhaust end of the one-way valve component 172 is connected to the gas tank 11.

[0027] The utility model also includes that a metal filter mesh 173 is welded inside the air inlet end of the air inlet connector 171 .

[0028] When in use, the air passing through the air inlet connector 171 is filtered by the metal filter mesh 173 .

[0029] In order to make the air supply mechanism one-way air intake, for example, Figure 3 , 4 As shown, the utility model also includes that the one-way valve member 172 includes a connecting sleeve 1721, a cover plate 1722 is provided at the exhaust end of the connecting sleeve 1721, and a support block 1723 integral with the exhaust end of the connecting sleeve 1721 is equidistantly provided on the inner circumference of the exhaust end, a spring 1724 is provided between the support block 1723 and the cover plate 1722, and both ends of the spring 1724 are connected to the support block 1723 and the cover plate 1722, and the diameter of the cover plate 1722 is larger than the through hole diameter of the connecting sleeve 1721.

[0030] When in use, the spring 1724 pushes the cover plate 1722 to cover the exhaust end of the connecting sleeve 1721. When the connecting sleeve 1721 is exhausted facing the air inlet connector 171, the spring 1724 on the cover plate 1722 is compressed to open the connecting sleeve 1721 for ventilation, so that the air in the gas tank 11 can be exhausted through the connecting sleeve 1721.

[0031] When the utility model is in use, the exhaust joint 16 is connected to the intake end of the pneumatic diaphragm valve that needs to be driven and operated through a pipeline, and the power supply component in the working site provides power for the electrical components in this application. When it is necessary to drive the flow channel switch of the pneumatic diaphragm valve to operate, the air pump 14 supplies air to the electromagnetic three-way valve 15, and the electromagnetic three-way valve 15 discharges the air to the top inside the air tank 11, so that the air presses on the diaphragm 13. Due to this pressure, the diaphragm 13 presses on the air at the bottom inside the air tank 11, so that the air at the bottom inside the air tank 11 is discharged into the pneumatic diaphragm valve through the exhaust joint 16, thereby providing pneumatic driving force for the pneumatic diaphragm valve. Subsequently, the air pump 14 stops working. When the pneumatic diaphragm valve needs to be released from the closed state, the electromagnetic three-way valve 15 switches, so that the air at the top inside the air tank 11 is discharged to the outside, the diaphragm 13 loses pressure, and the pneumatic diaphragm valve also loses pressure. Moreover, the air inside the pneumatic diaphragm valve will be discharged back into the air tank 11. During this period, the air driving the pneumatic diaphragm valve does not contact the outside air, thereby ensuring the use stability inside the pneumatic diaphragm valve;

[0032] When it is necessary to supplement air to the bottom inside the air tank 11, the air tank 11 can be supplemented with air through the air supplementing mechanism 17 with a one-way valve member 172, and the incoming air is filtered through the metal filter mesh 173, thereby improving the cleanliness of the incoming air;

[0033] Among them, the tank cover 12 can be regularly opened to clean and maintain the space at the top inside the air tank 11.

[0034] The above shows and describes the basic principles, main features and advantages of the utility model. Those skilled in the art of this industry should understand that the utility model is not limited by the above embodiments. The above embodiments and the descriptions in the specification only illustrate the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements all fall within the scope of protection required by the utility model. The scope of protection required by the utility model is defined by the appended claims and their equivalents.

Claims

1. A pneumatic diaphragm valve drive mechanism, characterized in that: The pneumatic drive mechanism (1) comprises a gas tank (11), a tank cover (12), a diaphragm (13) and an air supply mechanism (17); the diaphragm (13) is arranged at the top of the gas tank (11), and the outer periphery of the diaphragm (13) is glued and fixed to the inner wall of the gas tank (11); the tank cover (12) is connected to the top of the gas tank (11) via a flange; and one side of the gas tank (11) is connected to an exhaust joint (16) for supplying air to drive a pneumatic diaphragm valve.

2. A pneumatic diaphragm valve drive mechanism according to claim 1, characterized in that: An air pump (14) and an electromagnetic three-way valve (15) are installed on the top of the tank cover (12); an exhaust end of the air pump (14) is connected to one set of interfaces of the electromagnetic three-way valve (15) through a pipeline, and one of the other two sets of interfaces of the electromagnetic three-way valve (15) is connected to the tank cover (12).

3. A pneumatic diaphragm valve drive mechanism according to claim 2, characterized in that: The air replenishing mechanism (17) is arranged on the other side of the gas tank (11), and comprises an air intake connector (171) and a one-way valve component (172), wherein the air intake end of the one-way valve component (172) is connected to the exhaust end of the air intake connector (171), and the exhaust end of the one-way valve component (172) is connected to the gas tank (11).

4. A pneumatic diaphragm valve drive mechanism according to claim 3, characterized in that: A metal filter mesh (173) is welded inside the air inlet end of the air inlet connector (171).

5. A pneumatic diaphragm valve driving mechanism according to claim 4, characterized in that: The one-way valve component (172) comprises a connecting sleeve (1721), a cover plate (1722) being arranged at the exhaust end of the connecting sleeve (1721), a support block (1723) being arranged integrally with the exhaust end of the connecting sleeve (1721) at equal distances on the inner circumference of the exhaust end, a spring (1724) being arranged between the support block (1723) and the cover plate (1722), two ends of the spring (1724) being connected to the support block (1723) and the cover plate (1722), and the diameter of the cover plate (1722) being larger than the diameter of the through hole of the connecting sleeve (1721).

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