CN219035723U

CN219035723U - Electric proportion micro-pressure relief valve with self-pressure relief structure

Info

Publication number: CN219035723U
Application number: CN202320233025.0U
Authority: CN
Inventors: 张军亚
Original assignee: Shanghai Woyuan Automatic Control Valve Co ltd
Current assignee: Shanghai Woyuan Automatic Control Valve Co ltd
Priority date: 2023-02-16
Filing date: 2023-02-16
Publication date: 2023-05-16
Anticipated expiration: 2033-02-16

Abstract

The utility model relates to an electric proportion micro-pressure reducing valve with a self-pressure releasing structure, which comprises an electric proportion valve, wherein the electric proportion valve is connected with an air cylinder, the air cylinder is connected with a piston assembly, the piston assembly is connected with a diaphragm assembly, the diaphragm assembly is connected with a valve body assembly, a valve rod assembly is arranged in the valve body assembly and is contacted with the piston assembly, and the micro-pressure reducing valve realizes the self-pressure releasing function under high pressure by arranging the self-pressure releasing structure.

Description

Electric proportion micro-pressure relief valve with self-pressure relief structure

Technical Field

The utility model relates to the technical field of valves, in particular to an electric proportional micro-pressure reducing valve with a self-pressure-releasing structure.

Background

The existing micro-pressure relief valve has no electric proportional control, cannot realize remote control and automatic control, is mainly manually adjusted, for example, the outlet pressure is basically manually adjusted under the pressure of 0.5KPA to 10Kpa, has no self-pressure relief function under high pressure, mainly protects the relief valve and downstream equipment by installing an independent relief valve, and lacks the self-pressure relief function.

Disclosure of Invention

The utility model aims to provide an electric proportional micro-pressure reducing valve with a self-pressure relief structure, so as to solve the problems in the background technology.

In order to achieve the above purpose, the present utility model provides the following technical solutions: the electric proportional micro-pressure reducing valve with the self-pressure relief structure comprises an electric proportional valve, wherein the electric proportional valve is connected with a cylinder, the cylinder is connected with a piston assembly, the piston assembly is connected with a diaphragm assembly, the diaphragm assembly is connected with a valve body assembly, a valve rod assembly is arranged in the valve body assembly, and the valve rod assembly is in contact with the piston assembly; the piston assembly comprises a moving plate arranged in a cylinder, a hollow and internal thread column is arranged on the lower side of the moving plate, one end of the internal thread column is connected with the moving plate through a fixing screw, the other end of the internal thread column is connected with a diaphragm of the diaphragm assembly through a hollow screw, the hollow screw is provided with a first channel penetrating through the hollow screw, a second channel arranged in the internal thread column is arranged between the hollow screw and the fixing screw, a first through hole is formed in the side wall of the internal thread column, a second through hole is formed in the cylinder wall, and the first channel, the second channel, the first through hole and the second through hole are communicated; the valve stem assembly includes a valve stem body in contact with the first passageway.

Optionally, the moving plate is slidably connected to the cylinder wall.

Optionally, the membrane assembly includes a first membrane cover and a second membrane cover, and the membrane is disposed between the first membrane cover and the second membrane cover.

Optionally, the valve body assembly comprises a valve body and a rear cover fixedly connected with the valve body, wherein one side of the valve body is provided with an inlet, and the other side of the valve body is provided with an outlet.

Optionally, a partition plate is arranged in the valve body, and the partition plate is fixedly connected with a pressure taking pipe arranged at the outlet.

Optionally, the bottom end of the valve rod body is connected with a moving block, and a spring is arranged between the moving block and the rear cover.

Compared with the prior art, the utility model has the beneficial effects that:

1. the electric proportional micro-pressure reducing valve with the self-pressure relief structure is additionally provided with the electric proportional valve for providing thrust for the movable plate, and the electric proportional valve can receive 4-20mA signals, generate corresponding thrust and balance with the outlet pressure of the micro-pressure reducing valve, so that the automatic control and the remote control of the micro-pressure reducing valve are realized, and the requirement of automatic control is met.

2. The electric proportional micro-pressure reducing valve with the self-pressure relief structure realizes the self-pressure relief function under high pressure by arranging the self-pressure relief structure.

Drawings

FIG. 1 is a schematic diagram of a micropressure-reducing valve according to the present utility model;

FIG. 2 is a schematic diagram of the location of the components of the present utility model.

Detailed Description

In order to further describe the technical means and effects adopted by the present utility model for achieving the intended purpose, the following detailed description will refer to the specific implementation, structure, characteristics and effects according to the present utility model with reference to the accompanying drawings and preferred embodiments.

1-2, an electric proportional micro-pressure reducing valve with a self-pressure relief structure is characterized by comprising an electric proportional valve 100, wherein the electric proportional valve 100 is connected with a cylinder 200, the cylinder 200 is connected with a piston assembly 300, the piston assembly 300 is connected with a diaphragm assembly 400, the diaphragm assembly 400 is connected with a valve body assembly 500, a valve rod assembly 600 is arranged in the valve body assembly 500, and the valve rod assembly 600 is in contact with the piston assembly 300; the piston assembly 300 comprises a moving plate 301 arranged in the air cylinder 200, a hollow and internally threaded column 302 is arranged on the lower side of the moving plate 301, one end of the internally threaded column 302 is connected with the moving plate 301 through a fixing screw 303, the other end of the internally threaded column 302 is connected with a diaphragm 401 of the diaphragm assembly 400 through a hollow screw 304, the hollow screw 304 is provided with a first channel 305 penetrating through the hollow screw 304, a second channel 306 arranged in the internally threaded column 302 is arranged between the hollow screw 304 and the fixing screw 303, a first through hole 307 is formed in the side wall of the internally threaded column 302, a second through hole 308 is formed in the wall of the air cylinder 200, and the first channel 305, the second channel 306, the first through hole 307 and the second through hole 308 are communicated; the valve stem assembly 600 includes a valve stem body 601, the valve stem body 601 contacts the first channel 305, and the moving plate 301 is slidably connected to the wall of the cylinder 200.

The diaphragm assembly 400 includes a first diaphragm cover 402 and a second diaphragm cover 403, the diaphragm 401 being disposed between the first diaphragm cover 402 and the second diaphragm cover 403.

It should be noted that, the output pressure of the normal pressure electric proportional valve 100 is 0.5-5bar, the thrust after the combination of the cylinder 200 and the diaphragm assembly 400 is unchanged, the area of the diaphragm 401 is increased, the outlet pressure of the pressure reducing valve is reduced, compressed air enters the electric proportional valve 100, the electric proportional valve 100 receives a 4-20mA signal, air enters the cylinder 200 from the electric proportional valve 100, the moving plate 301 drives the internal thread column 302 to move to push the diaphragm 401, the medium pressure of the outlet 504 is balanced with the pressure of the diaphragm 401, so that the electric proportional valve 100 receives the 4-20mA signal and the micro pressure reducing valve outlet pressure in proportion, the automatic control, the remote control and the micro pressure reducing valve of the electric proportional control are realized, and the requirement of automatic control is met.

It should be further noted that, in a high pressure environment, the pressure on the lower side of the diaphragm 401 increases, so that the valve stem body 601 is separated from the first channel 305, and the gas enters the first channel 305 and passes through the second channel 306, the first through hole 307, and the second through hole 308 in order, and then is discharged out of the valve body.

The present structure is applied to the working condition of gas, such as the working condition applied to liquid, and a liquid recovery device is further required to be disposed at the second through hole 308.

The valve body assembly 500 comprises a valve body 501 and a rear cover 502 fixedly connected with the valve body 501, wherein an inlet 503 is formed in one side of the valve body 501, an outlet 504 is formed in the other side of the valve body 501, a partition plate 505 is arranged in the valve body 501, the partition plate 505 is fixedly connected with a pressure taking pipe 506 arranged at the outlet 504, and the pressure taking pipe 506 enables the pressure at the outlet to be more stable.

The bottom end of the valve rod body 601 is connected with a moving block 602, a spring 603 is arranged between the moving block 602 and the rear cover 502, and a sealing gasket is arranged at the contact position of the valve rod body 601 and the first channel 305.

The present utility model is not limited to the above embodiments, but is capable of modification and variation in detail, and other modifications and variations can be made by those skilled in the art without departing from the scope of the present utility model.

Claims

1. The electric proportional micro-pressure reducing valve with the self-pressure relief structure is characterized by comprising an electric proportional valve (100), wherein the electric proportional valve (100) is connected with a cylinder (200), the cylinder (200) is connected with a piston assembly (300), the piston assembly (300) is connected with a diaphragm assembly (400), the diaphragm assembly (400) is connected with a valve body assembly (500), a valve rod assembly (600) is arranged in the valve body assembly (500), and the valve rod assembly (600) is contacted with the piston assembly (300);

the piston assembly (300) comprises a moving plate (301) arranged in the air cylinder (200), a hollow inner threaded column (302) is arranged at the lower side of the moving plate (301), one end of the inner threaded column (302) is connected with the moving plate (301) through a fixing screw (303), the other end of the inner threaded column (302) is connected with a membrane (401) of the membrane assembly (400) through a hollow screw (304), a first channel (305) penetrating the hollow screw (304) is arranged on the hollow screw (304), a second channel (306) arranged in the inner threaded column (302) is arranged between the hollow screw (304) and the fixing screw (303), a first through hole (307) is formed in the side wall of the inner threaded column (302), a second through hole (308) is formed in the wall of the air cylinder (200), and the first channel (305), the second channel (306), the first through hole (307) and the second through hole (308) are communicated with each other.

The valve stem assembly (600) includes a valve stem body (601), the valve stem body (601) being in contact with the first passageway (305).

2. An electric proportional micro-pressure reducing valve with self-pressure relief structure according to claim 1, characterized in that said moving plate (301) is slidingly connected to the wall of the cylinder (200).

3. The electrical proportional micro-relief valve with self-relief structure of claim 2, wherein the diaphragm assembly (400) comprises a first diaphragm cap (402) and a second diaphragm cap (403), the diaphragm (401) being disposed between the first diaphragm cap (402) and the second diaphragm cap (403).

4. An electric proportional micro-pressure reducing valve with a self-pressure relief structure according to claim 3, wherein the valve body assembly (500) comprises a valve body (501) and a rear cover (502) fixedly connected with the valve body (501), one side of the valve body (501) is provided with an inlet (503), and the other side of the valve body (501) is provided with an outlet (504).

5. The electric proportional micro-pressure reducing valve with the self-pressure relief structure according to claim 4, wherein a partition plate (505) is arranged in the valve body (501), and the partition plate (505) is fixedly connected with a pressure taking pipe (506) arranged at the outlet (504).

6. The electric proportional micro-pressure reducing valve with the self-pressure relief structure according to claim 5, wherein the bottom end of the valve rod body (601) is connected with a moving block (602), and a spring (603) is arranged between the moving block (602) and the rear cover (502).