CN110985733A

CN110985733A - Self-operated pressure balance valve

Info

Publication number: CN110985733A
Application number: CN201911233565.3A
Authority: CN
Inventors: 吴金海
Original assignee: Zhongshan Dahai Automatic Control Valve Co ltd
Current assignee: Zhongshan Dahai Automatic Control Valve Co ltd
Priority date: 2019-12-05
Filing date: 2019-12-05
Publication date: 2020-04-10

Abstract

The invention provides a self-operated pressure balance valve, and relates to the technical field of self-operated balance valves. This formula of relying on oneself pressure balance valve, including the upper diaphragm cover, be equipped with the signal pressure opening in the middle of the upper diaphragm cover, the upper diaphragm cover passes through hexagon bolt fixedly connected with valve body, and is provided with the rubber diaphragm between upper diaphragm cover and the valve body, the inside and the deflector of valve body pass through crew cut bolt fixed connection, the lower extreme fixedly connected with upper seal ring of push pedal, the lateral wall fixedly connected with valve rod of upper seal ring, the valve rod inner wall is provided with adverse current pressure release hole, the outer wall fixedly connected with gasket of valve rod, the upper end fixedly connected with lower sealing ring of gasket, the lower extreme fixedly connected with spring of gasket, the lower extreme fixedly connected with lower valve gap of spring. In the invention, the opening of the valve is adjusted by utilizing the signal pressure input by the signal pressure port, so that the opening of the valve is changed or kept at a certain opening along with the change of the signal pressure, thereby achieving the effect of reducing or stabilizing pressure.

Description

Self-operated pressure balance valve

Technical Field

The invention relates to the technical field of self-operated balance valves, in particular to a self-operated pressure balance valve.

Background

The self-operated pressure balance valve is a valve with pressure regulation and pressure stabilization functions, is mainly applied to the occasions of pressure reduction or pressure stabilization of a pressure pipeline or a pressure container, and ensures that the pressure of the pressure pipeline or the pressure container at the outlet of the valve is kept in a stable state balanced with the signal pressure by adjusting the signal pressure to the pressure value required by the pressure pipeline or the pressure container at the outlet of the valve, and the pressure balance valve needle is used for non-corrosive gas.

Because the existing domestic self-operated pressure balance valve has the defects of complex structure, low control precision, poor pressure stabilizing effect and the like, some domestic high-end equipment needing to be matched with the balance valve mainly adopts the matching of imported balance valve products, and therefore the pressure balance valve with the specification is optimally designed.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides a self-operated pressure balance valve, which solves the problems of complex structure, low control precision and poor pressure stabilizing effect of the conventional self-operated pressure balance valve.

(II) technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme: the utility model provides a formula of relying on oneself pressure balance valve, includes the upper diaphragm cover, be equipped with the signal pressure opening in the middle of the upper diaphragm cover, the upper diaphragm cover is through first hexagon bolt fixedly connected with valve body, and is provided with the rubber diaphragm between upper diaphragm cover and the valve body, the inside and the deflector of valve body pass through flat head bolt fixed connection, the lower extreme fixedly connected with upper seal ring of push pedal, the valve rod inner wall is provided with adverse current pressure release hole, the outer wall fixedly connected with gasket of valve rod, the upper end fixedly connected with lower sealing ring of gasket, the lower extreme fixedly connected with spring of gasket, the lower extreme fixedly connected with lower valve gap of spring.

Preferably, a gas outlet is formed in one side of the valve body, a gas inlet is formed in the other side of the valve body, an upper gas chamber is formed in the inner sides of the rubber diaphragm and the upper diaphragm cover, and a lower gas chamber is formed in the upper ends of the rubber diaphragm and the guide plate.

Preferably, the pressing plate and the rubber diaphragm are fixedly connected with the pushing plate through a hexagon nut, and the upper diaphragm cover, the valve body and the rubber diaphragm are fixedly connected through a first hexagon bolt.

Preferably, a bushing is fixedly connected between the valve body and the lower sealing ring, and a filter screen is fixedly connected to the inner wall of the bushing.

Preferably, the lower end of the filter screen is fixedly connected with a lower valve cover, a first O-shaped ring is arranged on the outer side of the lower valve cover and the outer side of the filter screen, and second hexagonal bolts are fixedly connected to two ends of the lower valve cover.

Preferably, the filter screen is made of a material which is not resistant to corrosive gas, and the filter screen is in the shape of a cylindrical hole.

Preferably, the lower end of the valve rod is provided with two second O-rings.

(III) advantageous effects

The invention provides a self-operated pressure balance valve. The method has the following beneficial effects:

1. constantly adjust and keep at a certain aperture with signal pressure port to reach the effect of decompression or steady voltage, thereby realize that the pressure value of air inlet and gas outlet is balanced, not only the precision is high but also steady voltage is effectual.

2. When the signal pressure is adjusted to a zero pressure state, the valve is also in a completely closed state due to the action force of a spring arranged below the valve rod, the residual pressure of the gas outlet enters the lower gas chamber in a reverse flow manner, the reverse thrust is generated to act on the push rod and the diaphragm, so that the diaphragm drives the push plate to move upwards to enable a gap to be generated between the push plate and the valve rod, and therefore the pressure relief hole arranged in the middle of the valve rod is opened to enable the residual pressure in the lower gas chamber and the gas outlet to be exhausted rapidly, and the effect of simultaneously returning to zero of the outlet pressure and.

Drawings

FIG. 1 is a schematic cross-sectional view of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at B;

fig. 3 is an enlarged view of fig. 1 at a.

Wherein, 1, covering a membrane; 2. an upper air chamber; 3. a signal pressure port; 4. a hexagonal nut; 5. pressing a plate; 6. a rubber diaphragm; 7. pushing the plate; 8. a flat head bolt; 9. a guide plate; 10. a valve body; 11. an upper seal ring; 12. a bushing; 13. an air outlet; 14. a lower seal ring; 15. a gasket; 16. a valve stem; 17. a filter screen; 18. a first O-ring; 19. a second O-ring; 20. a reverse flow pressure relief vent; 21. a lower valve cover; 22. an air inlet; 23. a spring; 24. a lower air chamber; 25. a first hexagon bolt; 26. and a second hexagon bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1 to 3, an embodiment of the present invention provides a self-operated pressure balance valve, which includes an upper membrane cover 1, and is characterized in that: go up and be equipped with signal pressure port 3 in the middle of the membrane lid 1, go up membrane lid 1 through first hexagon bolt 25 fixedly connected with valve body 10, and be provided with rubber diaphragm 6 between last membrane lid 1 and the valve body 10, the inside of valve body 10 and deflector 9 pass through flat head bolt 8 fixed connection, the lower extreme fixedly connected with upper seal ring 11 of push pedal 7, the 16 inner walls of valve rod are provided with pressure release hole 20 against the current, the outer wall fixedly connected with gasket 15 of valve rod 16, the upper end fixedly connected with lower seal ring 14 of gasket 15, the lower extreme fixedly connected with spring 23 of gasket 15, valve gap 21 under the lower extreme fixedly connected with of spring 23.

An air outlet 13 is arranged on one side of the valve body 10, an air inlet 22 is arranged on the other side of the valve body 10, an upper air chamber 2 is arranged on the inner sides of the rubber diaphragm 6 and the upper diaphragm cover 1, a lower air chamber 24 is arranged at the upper ends of the rubber diaphragm 6 and the guide plate 9, the pressing plate 5 and the rubber diaphragm 6 are fixedly connected through a hexagon nut 4 and a pushing plate 7, the upper diaphragm cover 1, the valve body 10 and the rubber diaphragm 6 are fixedly connected through a first hexagon bolt 25, a lining 12 is fixedly connected between the valve body 10 and a lower sealing ring 14, a filter screen 17 is fixedly connected to the inner wall of the lining 12, a lower valve cover 21 is fixedly connected to the lower end of the filter screen 17, a first O-shaped ring 18 is arranged on the outer side of the lower valve cover 21 and the outer side of the filter screen 17, second hexagon bolts 26 are fixedly connected to both ends of, the lower end of the stem 16 is provided with second O-rings 19, and the number of the second O-rings 19 is two.

The working principle is as follows: inputting given signal pressure to the upper air chamber 2 by an air source interface arranged at the top of the upper membrane cover 1, generating downward thrust by the rubber membrane 6, pushing the valve rod 16 through the push plate 7 to open the valve, enabling pipeline media to enter the lower air chamber 24 and the air outlet 13 after the valve is opened, generating reverse thrust to act on the push plate 7 and the rubber membrane 6 to enable the rubber membrane 6 to drive the push plate 7 to move upwards when the media pass through the lower air chamber 24, enabling the valve to be closed or keeping a certain opening degree along with continuous adjustment of the signal pressure port 3 by the upward thrust generated by a compression spring 23 arranged below the valve rod 16 when the push plate 7 moves upwards, thereby achieving the effect of pressure reduction or pressure stabilization, when the signal pressure port 3 is closed, enabling the valve to be in a completely closed state due to the acting force of the spring 23 arranged below the valve rod 16, enabling residual pressure of the air outlet 13 to reversely flow into the lower air chamber 24 at the moment, generating reverse thrust to act on the push plate 7 and the rubber A clearance is generated between the valve rod 16 so as to open a pressure relief hole arranged in the middle of the valve rod 16, and the residual pressure in the lower air chamber 24 and the air outlet 13 is rapidly exhausted.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a formula of relying on oneself pressure balance valve, includes upper membrane lid (1), its characterized in that: be equipped with signal pressure port (3) in the middle of last membrane lid (1), go up membrane lid (1) through first hexagon bolt (25) fixedly connected with valve body (10), and go up and be provided with rubber diaphragm (6) between membrane lid (1) and valve body (10), the inside and deflector (9) of valve body (10) are through flat head bolt (8) fixed connection, lower extreme fixedly connected with upper seal ring (11) of push pedal (7), valve rod (16) inner wall is provided with adverse current pressure release hole (20), the outer wall fixedly connected with gasket (15) of valve rod (16), the upper end fixedly connected with lower seal ring (14) of gasket (15), the lower extreme fixedly connected with spring (23) of gasket (15), valve gap (21) under the lower extreme fixedly connected with of spring (23).

2. A self-operated pressure balanced valve as claimed in claim 1, wherein: the air-conditioning valve is characterized in that an air outlet (13) is formed in one side of the valve body (10), an air inlet (22) is formed in the other side of the valve body (10), an upper air chamber (2) is formed in the inner sides of the rubber diaphragm (6) and the upper diaphragm cover (1), and a lower air chamber (24) is formed between the rubber diaphragm (6) and the guide plate (9).

3. A self-operated pressure balanced valve as claimed in claim 1 or claim 2, in which: the pressing plate (5) and the rubber diaphragm (6) are fixedly connected through a hexagon nut (4) and a pushing plate (7), and the upper diaphragm cover (1), the valve body (10) and the rubber diaphragm (6) are fixedly connected through a first hexagon bolt (25).

4. A self-operated pressure balanced valve as claimed in claim 1, wherein: equal fixedly connected with bush (12) between valve body (10) and lower sealing ring (14), the outer wall fixedly connected with filter screen (17) of bush (12).

5. A self-operated pressure balanced valve as claimed in claim 1, wherein: the lower end of the filter screen (17) is fixedly connected with a lower valve cover (21), a first O-shaped ring (18) is arranged on the outer side of the lower valve cover (21) and the outer side of the filter screen (17), and two ends of the lower valve cover (21) are fixedly connected with second hexagonal bolts (26).

6. A self-operated pressure balanced valve as claimed in claim 4 or claim 5, in which: the filter screen (17) is made of a material which is not resistant to corrosive gas, and the filter screen (17) is in a cylindrical hole shape.

7. A self-operated pressure balanced valve as claimed in claim 1, wherein: the lower end of the valve rod (16) is provided with two second O-shaped rings (19), and the number of the second O-shaped rings (19) is two.