Pneumatic two-position three-way diaphragm valve

Abstract

The utility model provides pneumatic two position three way diaphragm valve relates to diaphragm valve technical field, including valve body, the water inlet end of valve body is installed with built -in tube, the pipe orifice of built -in tube side to valve body diaphragm is inclined to set up and is installed with filter plate, the filter plate top edge is close to valve body water inlet end setting and filter plate bottom edge is close to valve body diaphragm setting, when outside board and inside board respectively stick to filter plate outside and inside, the hollow part of built -in tube is located in the space separated by the impurity accumulation, at this moment, through electric telescopic link elongation, piston plate can realize descending in the impurity removal cylinder, until piston plate extends the impurity removal pipe, at this moment, the impurity that filter plate bottom accumulated can drop and discharge through the impurity removal cylinder, realizes the impurity cleaning of internal filtration under the condition of not influencing valve body use.

Description

Technical Field

[0001] This utility model relates to the field of diaphragm valve technology, and in particular to a pneumatic two-position three-way diaphragm valve. Background Technology

[0002] A diaphragm valve is a new type of valve. Its opening and closing element is a diaphragm made of soft material, which separates the valve body cavity from the valve cover cavity and the drive components. In order to protect the internal diaphragm, the pneumatic two-position three-way diaphragm valve has a built-in filter unit. The filter unit can effectively filter out solid particles, impurities and foreign objects in the fluid, protect the diaphragm from damage, and extend the service life of the diaphragm.

[0003] However, the built-in filter unit will clog the filter screen when filtering out enough impurities, so the filter unit needs to be cleaned. When cleaning the built-in filter unit of the pneumatic two-position three-way diaphragm valve, the filter unit usually needs to be removed from the diaphragm valve in order to clean the impurities more thoroughly. When cleaning the filter unit, the diaphragm valve is in a stopped state, which will affect the working efficiency. Utility Model Content

[0004] The purpose of this utility model is to solve the problems existing in the prior art by proposing a pneumatic two-position three-way diaphragm valve.

[0005] To achieve the above objectives, this utility model adopts the following technical solution: a pneumatic two-position three-way diaphragm valve, including a valve body. An internal pipe is installed at the water inlet end of the valve body. The internal pipe is inclined towards the diaphragm side of the valve body and has a filter plate installed thereon. The top edge of the filter plate is located near the water inlet end of the valve body, and the bottom edge of the filter plate is located near the diaphragm of the valve body. Several parallel guide rods are fixedly installed through the filter plate near its bottom edge. The guide rods are parallel to the central axis of the water inlet end of the valve body, and the surfaces of the guide rods are respectively fitted with inner and outer side plates on the inner and outer sides of the filter plate. A discharge cylinder is fixedly installed through the valve body near the bottom edge of the filter plate. The internal pipe is hollowed out at the opening of the discharge cylinder. A piston plate is slidably installed inside the discharge cylinder, and several electric telescopic rods are fixedly installed on the outer wall of the discharge cylinder. The electric telescopic rods are parallel to the central axis of the discharge cylinder, and the bottom edge of the piston plate extends downwards and is fixedly connected to the telescopic ends of the electric telescopic rods.

[0006] Preferably, an inner electric push rod is fixedly installed on the surface of the filter plate, and an outer electric push rod is also fixedly installed through the surface of the filter plate. The telescopic end of the inner electric push rod is connected to the inner plate, and the telescopic end of the outer electric push rod is connected to the outer side surface.

[0007] Preferably, the inner electric push rod cylinder penetrates the outer side surface, and the outer electric push rod cylinder penetrates the inner side plate.

[0008] Preferably, the vertical cross-section of the inner side plate is V-shaped, and one side of the inner side plate is parallel to the central axis of the valve body inlet.

[0009] Preferably, a switch valve is installed through the wall of the discharge cylinder near the top, and an air vent valve is installed through the inner side plate on the side parallel to the central axis of the valve body's water inlet end.

[0010] Preferably, an exhaust pipe is fixedly installed on the surface of one of the guide rods, one end of which is used to connect with the valve port of the exhaust valve, and a solenoid valve is built into the other end of the exhaust pipe.

[0011] Preferably, one of the guide rods is fixedly installed with an extension tube integrally formed with the other end of the exhaust pipe on the inner side of the filter plate, and a threaded insertion tube is provided through the surface of the valve body. One end of the threaded insertion tube is provided through the wall of the inner tube and is threadedly connected to the extension tube.

[0012] Compared with the prior art, the advantages and positive effects of this utility model are as follows:

[0013] 1. In this utility model, when the outer side plate and the inner side plate are respectively attached to the outer side and the inner side of the filter plate, the hollow part of the built-in tube is located in the space separated by the accumulated impurities. At this time, the piston plate can be lowered in the discharge cylinder by extending the electric telescopic rod until the piston plate extends out of the discharge pipe. At this time, the impurities accumulated at the bottom of the filter plate can be discharged through the discharge cylinder, and the internal filter impurities are cleaned without affecting the use of the valve body.

[0014] 2. In this utility model, by opening the exhaust valve, solenoid valve, and switching valve, liquid of the same type as the medium flowing in the valve body is injected into the discharge cylinder through the switching valve until the discharge cylinder is full. Then, the switching valve is closed, and the piston block continues to rise, causing the liquid in the discharge cylinder to enter the space between the inner side plate and the filter plate. The air originally located in the space between the inner side plate and the filter plate enters the exhaust pipe through the opened exhaust valve and solenoid valve, and finally enters the extension pipe and threaded insertion pipe for discharge. Then, the exhaust valve and solenoid valve are closed, and the inner side plate and outer side plate move away from the filter plate. The filter plate can then be reused to filter the liquid, and air will not enter the valve body. Attached Figure Description

[0015] Figure 1 A three-dimensional structural diagram of a pneumatic two-position three-way diaphragm valve is provided for this utility model.

[0016] Figure 2 This utility model proposes a pneumatic two-position three-way diaphragm valve. Figure 1 A schematic diagram of the cross-sectional structure;

[0017] Figure 3 This utility model proposes a pneumatic two-position three-way diaphragm valve. Figure 2 A schematic diagram of the rear section structure;

[0018] Figure 4 This utility model proposes a pneumatic two-position three-way diaphragm valve. Figure 3 A cross-sectional structural diagram.

[0019] Legend: 1. Valve body; 2. Internal tube; 3. Filter plate; 4. Outer plate; 5. Inner electric push rod; 6. Guide rod; 7. Waste discharge cylinder; 8. Electric telescopic rod; 9. Extension tube; 10. Exhaust pipe; 11. Inner plate; 12. Threaded insert; 13. Exhaust valve; 14. Piston plate; 15. Outer electric push rod; 16. Switch valve. Detailed Implementation

[0020] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described below with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0021] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the present invention is not limited to the specific embodiments disclosed in the following specification.

[0022] like Figures 1-4 As shown, a pneumatic two-position three-way diaphragm valve includes a valve body 1. An internal pipe 2 is installed at the water inlet end of the valve body 1. The internal pipe 2 is bolted to the water inlet port of the valve body 1. The internal pipe 2 is inclined towards the diaphragm side of the valve body 1 and a filter plate 3 is installed thereon. The top edge of the filter plate 3 is positioned near the water inlet end of the valve body 1, and the bottom edge of the filter plate 3 is positioned near the diaphragm of the valve body 1. Figure 4As shown, the inclined filter plate 3, while filtering and intercepting impurities in the water, also helps impurities accumulate at the bottom of the filter plate 3. Several parallel guide rods 6 are fixedly installed through the filter plate 3 near its bottom edge. The guide rods 6 are parallel to the central axis of the valve body 1's inlet end, and inner side plates 11 and outer side plates 4 are respectively fitted onto the inner and outer sides of the filter plate 3. The inner side plate 11 has a V-shaped vertical section, and one side of the inner side plate 11 is parallel to the central axis of the valve body 1's inlet end. In use, the guide rods 6 guide the outer side plate 4 and inner side plate 11 to move relative to each other until they are respectively attached to the outer and inner sides of the filter plate 3, thus creating a space in the area where impurities accumulate at the bottom of the inner side of the filter plate 3. The valve body 1 is fixedly installed through the filter plate 3 near its bottom edge. A discharge cylinder 7 is installed, and the internal tube 2 is hollowed out at the opening of the discharge cylinder 7. A piston plate 14 is slidably installed inside the discharge cylinder 7, and several electric telescopic rods 8 are fixedly installed on the outer wall of the discharge cylinder 7. The electric telescopic rods 8 are parallel to the central axis of the discharge cylinder 7, and the bottom edge of the piston plate 14 extends downward and is fixedly connected to the telescopic ends of the electric telescopic rods 8. When the outer side plate 4 and the inner side plate 11 are respectively attached to the outer and inner sides of the filter plate 3, the hollow part of the internal tube 2 is located in the space separated by the accumulated impurities. At this time, the piston plate 14 can be lowered in the discharge cylinder 7 by extending the electric telescopic rods 8 until the piston plate 14 extends out of the discharge pipe. At this time, the impurities accumulated at the bottom of the filter plate 3 can fall out through the discharge cylinder 7 and be discharged, thus cleaning the impurities in the internal filter without affecting the use of the valve body 1.

[0023] An inner electric push rod 5 is fixedly installed on the surface of the filter plate 3, and an outer electric push rod 15 is also fixedly installed through the surface of the filter plate 3. The telescopic end of the inner electric push rod 5 is connected to the inner side plate 11, and the telescopic end of the outer electric push rod 15 is connected to the outer side surface. The cylinder of the inner electric push rod 5 penetrates through the outer side surface, and the cylinder of the outer electric push rod 15 is set through the inner side plate 11. A sealing gasket is set between the inner side plate 11 and the cylinder of the outer electric push rod 15 to achieve waterproofing. Similarly, the contact part between the outer side plate 4 and the cylinder of the inner electric push rod 5 is also sealed by installing a sealing gasket. By retracting the outer electric push rod 15 and the inner electric push rod 5, the outer side plate 4 and the inner side plate 11 can be moved relative to each other.

[0024] A switch valve 16 is installed through the wall of the discharge cylinder 7 near the top. An air vent valve 13 is installed through the inner side plate 11, parallel to the central axis of the water inlet end of the valve body 1. An air vent pipe 10 is fixedly installed on the surface of one of the guide rods 6. One end of the air vent pipe 10 is used to connect with the valve port of the air vent valve 13, and a solenoid valve is built into the other end of the air vent pipe 10. An extension pipe 9, integrally formed with the other end of the air vent pipe 10, is fixedly installed on the inner side of one of the guide rods 6 in the direction of the filter plate 3. A threaded insertion tube 12 is installed through the surface of the valve body 1. One end of the threaded insertion tube 12 is installed through the wall of the built-in tube 2 and is threadedly connected to the extension pipe 9. After the impurities are cleaned, the piston block retracts with the electric telescopic rod 8 and re-enters the discharge cylinder 7. At this time, the inner side plate 11 is in contact with the inner side of the filter plate 3, and the valve port of the air vent valve 13 installed on its surface will be aligned with the port of the air vent pipe 10. A sealing gasket is installed at the port to achieve a seal. At this time, by opening the exhaust valve 13, the solenoid valve, and the switching valve 16, the same liquid as the medium flowing in the valve body 1 is injected into the discharge cylinder 7 through the switching valve 16 until the injected liquid fills the discharge cylinder 7. The volume of the discharge cylinder 7 is equal to the volume of the space formed by the inner side plate 11 and the inner side of the filter plate 3. Then the switching valve 16 is closed, and the piston block continues to rise, driving the liquid in the discharge cylinder 7 into the space between the inner side plate 11 and the filter plate 3. When the liquid enters, the air originally located in the space between the inner side plate 11 and the filter plate 3 enters the exhaust pipe 10 through the opened exhaust valve 13 and the solenoid valve, and finally enters the extension pipe 9 and the threaded insertion pipe 12 to be discharged. Then the exhaust valve 13 and the solenoid valve are closed, and the inner side plate 11 and the outer side plate 4 are moved away from the filter plate 3, so that the filter plate 3 can be reused to filter the liquid.

[0025] The method of using this utility model is as follows: When in use, the liquid entering the valve body 1 is filtered by the filter plate 3 to trap impurities. When it is necessary to clean the impurities in the internal tube 2, the outer electric push rod 15 and the inner electric push rod 5 are retracted to move the outer plate 4 and the inner plate 11 relative to each other and fit against the outer and inner sides of the filter plate 3 respectively. The electric telescopic rod 8 is extended to allow the piston plate 14 to descend in the discharge cylinder 7 until the piston plate 14 extends out of the discharge pipe. At this time, the impurities accumulated at the bottom of the filter plate 3 can fall out through the discharge cylinder 7 and be discharged, thus cleaning the impurities filtered inside the valve body 1 without affecting its use.

[0026] The wiring diagrams for the valve body 1, inner electric push rod 5, electric telescopic rod 8, outer electric push rod 15, exhaust valve 13, switching valve 16, and solenoid valve in this utility model are common knowledge in the field. Their working principles are known technologies, and the appropriate models are selected according to actual use. Therefore, the control methods and wiring arrangements for the valve body 1, inner electric push rod 5, electric telescopic rod 8, outer electric push rod 15, exhaust valve 13, switching valve 16, and solenoid valve will not be explained in detail.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A pneumatic two-position three-way diaphragm valve, comprising a valve body (1), characterized in that: An internal pipe (2) is installed at the water inlet end of the valve body (1). The internal pipe (2) is inclined toward the diaphragm side of the valve body (1) and a filter plate (3) is installed thereon. The top edge of the filter plate (3) is close to the water inlet end of the valve body (1) and the bottom edge of the filter plate (3) is close to the diaphragm of the valve body (1). Several parallel guide rods (6) are fixedly installed through the filter plate (3) near the bottom edge. The guide rods (6) are parallel to the central axis of the water inlet end of the valve body (1) and the surfaces of the guide rods (6) are located on the inner and outer sides of the filter plate (3). An inner side plate (11) and an outer side plate (4) are fitted together. A discharge cylinder (7) is fixedly installed through the surface of the valve body (1) near the bottom edge of the filter plate (3). The built-in tube (2) is hollowed out at the opening of the discharge cylinder (7). A piston plate (14) is slidably installed inside the discharge cylinder (7), and several electric telescopic rods (8) are fixedly installed on the outer wall of the discharge cylinder (7). The electric telescopic rods (8) are parallel to the central axis of the discharge cylinder (7), and the bottom edge of the piston plate (14) extends downward and is fixedly connected to the telescopic end of the several electric telescopic rods (8).

2. The pneumatic two-position three-way diaphragm valve according to claim 1, characterized in that: An inner electric push rod (5) is fixedly installed on the surface of the filter plate (3), and an outer electric push rod (15) is also fixedly installed through the surface of the filter plate (3). The telescopic end of the inner electric push rod (5) is connected to the inner plate (11), and the telescopic end of the outer electric push rod (15) is connected to the outer side surface.

3. The pneumatic two-position three-way diaphragm valve according to claim 2, characterized in that: The inner electric push rod (5) cylinder body penetrates the outer side surface, and the outer electric push rod (15) cylinder body penetrates the inner side plate (11).

4. The pneumatic two-position three-way diaphragm valve according to claim 1, characterized in that: The inner side plate (11) has a V-shaped vertical section, and one side of the inner side plate (11) is parallel to the central axis of the water inlet end of the valve body (1).

5. The pneumatic two-position three-way diaphragm valve according to claim 1, characterized in that: A switch valve (16) is installed through the top of the wall of the discharge cylinder (7), and an air vent valve (13) is installed through the inner side plate (11) on the side parallel to the central axis of the water inlet end of the valve body (1).

6. The pneumatic two-position three-way diaphragm valve according to claim 5, characterized in that: One of the guide rods (6) has an exhaust pipe (10) fixedly installed on its surface. One end of the exhaust pipe (10) is used to connect with the valve port of the exhaust valve (13), and a solenoid valve is built into the other end of the exhaust pipe (10).

7. The pneumatic two-position three-way diaphragm valve according to claim 6, characterized in that: One of the guide rods (6) is fixedly installed on the inner side of the filter plate (3) with an extension tube (9) integrally formed with the other end of the exhaust pipe (10). A threaded insert (12) is provided through the surface of the valve body (1). One end of the threaded insert (12) is provided through the wall of the built-in tube (2) and is threadedly connected to the extension tube (9).

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