CN112197037A

CN112197037A - Bidirectional normally closed pneumatic poppet valve

Info

Publication number: CN112197037A
Application number: CN202010987691.4A
Authority: CN
Inventors: 林福明
Original assignee: Ningbo Zhenhai Tiandi Hydraulic Co ltd
Current assignee: Ningbo Zhenhai Tiandi Hydraulic Co ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-01-08

Abstract

The invention relates to the technical field of pneumatic elements, in particular to a bidirectional normally closed pneumatic poppet valve which comprises a top cover, a connecting ring sleeve, a valve seat, an oil port connecting sleeve and a valve sleeve, wherein the upper part of the connecting ring sleeve is fixedly connected with the top cover, the lower part of the connecting ring sleeve is fixedly connected with the upper part of the valve seat, the oil port connecting sleeve is rotatably sleeved on the valve seat, the lower part of the valve seat is fixedly connected with the valve sleeve, the valve sleeve is provided with a first working port and a second working port, a main valve core capable of moving up and down is arranged in the valve sleeve, the first working port and the second working port are communicated or closed through the up and down movement of the main valve core, a control valve core capable of moving up and down is arranged in the valve seat, a spring seat capable of moving up and down is arranged in the connecting ring sleeve, the. With such a structural arrangement, it has bi-directionality.

Description

Bidirectional normally closed pneumatic poppet valve

Technical Field

The invention relates to the technical field of pneumatic elements, in particular to a bidirectional normally closed pneumatic lift valve.

Background

The pneumatic poppet valve refers to various pneumatic elements which control the pressure, flow rate and flow direction of air flow in a pneumatic system and ensure the normal work of a pneumatic actuator or mechanism. The structure of the pneumatic lift valve can be decomposed into a valve body and a valve core, wherein the valve body comprises structural components such as a valve seat, a valve hole and the like, and the pneumatic lift valve has a normally closed type and a normally open type according to the relative position of the valve body and the valve core. The element that controls and regulates the pressure of the compressed air is called a pressure control valve, the element that controls and regulates the flow of the compressed air is called a flow control valve, and the element that changes and controls the direction of the flow of the air is called a directional control valve.

At present, most switch valves of sprinklers are used in combination with one-way valves, and the one-way valves have the defect of no bi-directionality, so that it is necessary to develop a pneumatic lift valve with bi-directionality for use in combination with the switch valves of sprinklers.

Disclosure of Invention

Aiming at the problems, the invention provides a bidirectional normally closed pneumatic poppet valve which effectively solves the defects in the prior art.

In order to achieve the purpose, the technical scheme applied by the invention is as follows:

a bidirectional normally closed pneumatic poppet valve comprises a top cover, a connecting ring sleeve, a valve seat, an oil port connecting sleeve and a valve sleeve, wherein the upper part of the connecting ring sleeve is fixedly connected with the top cover, the lower part of the connecting ring sleeve is fixedly connected with the upper part of the valve seat, the oil port connecting sleeve is rotatably sleeved on the valve seat, the lower part of the valve seat is fixedly connected with the valve sleeve, the valve sleeve is provided with a first working port and a second working port, a main valve core capable of moving up and down is arranged in the valve sleeve, the first working port and the second working port are communicated or closed by the up and down movement of the main valve core, a control valve core capable of moving up and down is arranged in the valve seat, a spring seat capable of moving up and down is arranged in the connecting ring sleeve, the upper part of the control valve core is fixed on the spring seat through a set screw, the lower part of the, one end of the first channel is communicated with the first cavity, the other end of the first channel is communicated with the second working port, one end of the second channel is correspondingly plugged with the conical end of the control valve core, a steel ball and an elastic pin are arranged in the other end of the second channel, the oil port connecting sleeve is provided with a control port, a third channel and the second cavity are formed between the valve seat and the spring seat, one end of the third channel is communicated with the second cavity, and the other end of the third channel is communicated with the control port.

According to the scheme, a filter screen and a filter screen compression ring are arranged at the joint of the first channel and the second working opening, and the filter screen is fixed on the main valve core through the filter screen compression ring.

According to the scheme, the top cover is provided with the air holes.

According to the scheme, the valve seat is provided with the copper pressure ring convenient for the control valve core to penetrate, and the rubber ring III is arranged between the copper pressure ring and the valve seat.

According to the scheme, the rubber ring I is sleeved on the upper portion of the outer wall of the valve sleeve, and the gasket I and the rubber ring II are sleeved on the lower portion of the outer wall of the valve sleeve.

According to the scheme, a second gasket, a third rubber ring and a second thread sealing glue are arranged between the inner wall of the valve sleeve and the outer wall of the valve seat.

According to the scheme, a rubber ring IV is arranged between the outer wall of the valve seat and the inner wall of the oil port connecting sleeve, a rubber ring V is arranged between the inner wall of the valve seat and the outer wall of the spring seat, and a rubber ring VI and a thread sealing rubber I are arranged between the outer wall of the valve seat and the inner wall of the connecting sleeve.

According to the scheme, a rubber ring seven is arranged between the inner wall of the connecting ring sleeve and the outer wall of the spring seat, and a thread sealant III is arranged between the inner wall of the connecting ring sleeve and the outer wall of the top cover.

The invention has the beneficial effects that:

the invention adopts the structure arrangement, the working port I and the working port II are in a normally closed non-communicated state under the normal state, when high-pressure fluid medium is input into the working port I, the fluid of the working port I cannot enter the channel II due to the blocking of the steel ball, the fluid at the working port I can exert integral upward acting force on the main valve core under the action of pressure, the main valve core drives the control valve core which is butted on the channel II of the main valve core to move upwards together, the control valve core is fixed on the spring seat through the set screw, so that the spring seat is driven to move upwards, the elastic force of the spring is overcome, the main valve core, the control valve core and the spring seat move upwards synchronously, and when the main valve core moves upwards to a certain distance, the working port I is communicated with the working port II; when a high-pressure fluid medium is input into the working port II, the working port II is communicated with the cavity I through the channel I, so that the pressure of the cavity I and the working port II is balanced, the pressure at the working port II cannot push the main valve core upwards, at the moment, compressed gas needs to be introduced into the control port in addition when the working port II is communicated with the working port I, the compressed gas at the control port flows to the cavity II through the channel, the pressure of the cavity II rises, the spring seat is pushed upwards to overcome the elastic force of the spring and move upwards, the control valve core also moves upwards due to the fixed connection of the spring seat and the control valve core, the conical end at the bottom of the control valve core is separated from the channel II, at the moment, the cavity I is communicated with the channel II, the fluid of the cavity I enters the channel II, and the steel ball overcomes the elastic force of the elastic pin under the action of the pressure and moves downwards, at the moment, the fluid entering the second channel flows out from the working port, at the moment, the pressure of the first cavity is smaller than that of the second working port, the pressure at the second working port can push the main valve core to move upwards integrally, the first working port is communicated with the second working port, and the bidirectional effect is achieved.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a cross-sectional view of the overall structure of the present invention.

1. A valve housing; 2. a main valve element; 3. an oil port connecting sleeve; 4. a valve seat; 5. a spring seat; 6. a control valve core; 7. tightening the screw; 8. a connecting ring sleeve; 9. a spring; 10. a top cover; 11. a steel ball; 12. an elastic pin; 13. a rubber ring I; 14. a first gasket; 15. a second rubber ring; 16. a second gasket; 17. a third rubber ring; 18. a third rubber ring; 19. a rubber ring IV; 20. a rubber ring five; 21. a rubber ring six; 22. a rubber ring seven; 23. filtering with a screen; 24. a filter screen is pressed; 25. a copper pressure ring; 26. air holes are formed; 27. a control port; 28. thread sealing glue I; 29. thread sealant II; 30. a first working opening; 31. a second working opening; 32. a first channel; 33. a second channel; 34. a third channel; 35. a first cavity; 36. a second cavity; 37. and (5) thread sealant III.

Detailed Description

The technical solution of the present invention is described below with reference to the accompanying drawings and examples.

As shown in fig. 1 and 2, the bidirectional normally closed pneumatic poppet valve of the present invention comprises a top cover 10, a coupling sleeve 8, a valve seat 4, an oil port connecting sleeve 3 and a valve sleeve 1, wherein the upper part of the coupling sleeve 8 is fixedly connected with the top cover 10, the lower part of the coupling sleeve 8 is fixedly connected with the upper part of the valve seat 4, the oil port connecting sleeve 3 is rotatably sleeved on the valve seat 4, the lower part of the valve seat 4 is fixedly connected with the valve sleeve 1, the valve sleeve 1 is provided with a first working port 30 and a second working port 31, a main valve element 2 capable of moving up and down is arranged in the valve sleeve 1, the first working port 30 and the second working port 31 are communicated or closed by the up and down movement of the main valve element 2, a control valve element 6 capable of moving up and down is arranged in the valve seat 4, a spring seat 5 capable of moving up and down is arranged in the coupling sleeve 8, the upper part of the control, a spring 9 is arranged between the spring seat 5 and the top cover 10, a first cavity 35 is arranged between the main valve element 2 and the valve seat 4, a first channel 32 and a second channel 33 are arranged on the main valve element 2, one end of the first channel 32 is communicated with the first cavity 35, the other end of the first channel 32 is communicated with a second working port 31, one end of the second channel 33 is correspondingly blocked with the conical end of the control valve element 6, a steel ball 11 and an elastic pin 12 are arranged in the other end of the second channel 33, a control port 27 is arranged on the oil port connecting sleeve 3, a third channel 34 and a second cavity 36 are formed between the valve seat 4 and the spring seat 5, one end of the third channel 34 is communicated with the second cavity 36, and the other end of the. The above constitutes the basic structure of the present invention.

The invention adopts the structure arrangement, the working port I30 and the working port II 31 are in a normally closed non-communicated state under the normal state, when high-pressure fluid medium is input into the working port I30, because of the blockage of the steel ball 11, the fluid of the working port I30 can not enter the channel II 33, the fluid at the working port I30 can exert integral upward acting force on the main valve element 2 under the action of pressure, the main valve element 2 drives the control valve element 6 which is propped against the channel II 33 of the main valve element 2 to move upwards together, because the control valve element 6 is fixed on the spring seat 5 through the set screw 7, the spring seat 5 is driven to move upwards, the elastic force of the spring 9 is overcome, the main valve element 2, the control valve element 6 and the spring seat 5 move upwards synchronously, and when the main valve element 2 moves upwards to a certain distance, the working port I30 is communicated with the working port;

when high-pressure fluid medium is input into the working port II 31, the channel I32 communicates the working port II 31 with the cavity I35, so that the pressure of the cavity I35 is balanced with that of the working port II 31, therefore, the pressure at the working port II 31 cannot push the main valve element 2 upwards, at this time, in order to communicate the working port II 31 with the working port I30, compressed gas needs to be additionally introduced into the control port 27, the compressed gas at the control port 27 flows to the cavity II 36 through the channel III 34, the pressure of the cavity II 36 rises, the spring seat 5 is pushed upwards, the spring seat 5 overcomes the elastic force of the spring 9 to move upwards, as the spring seat 5 is fixedly connected with the control valve element 6, the control valve element 6 also moves upwards, the conical end at the bottom of the control valve element 6 is separated from the channel II 33, at this time, the cavity I35 is communicated with the channel II 33, the fluid of the cavity I35 enters the channel II 33, and, the steel ball 11 overcomes the elasticity of the elastic pin 12 and moves downwards, at the moment, the second channel 33 is communicated with the first working port 30, the fluid entering the second channel 33 flows out of the first working port 30, at the moment, the pressure of the first cavity 35 is smaller than the pressure of the second working port 31, the pressure at the second working port 31 can push the main valve element 2 to move upwards integrally, and the first working port 30 is communicated with the second working port 31.

In this embodiment, a filter screen 23 and a filter screen compression ring 24 are arranged at a connection position of the first channel 32 and the second working opening 31, and the filter screen 23 is fixed on the main valve element 2 through the filter screen compression ring 24. By adopting the structure, impurities are prevented from entering when high-pressure fluid medium is input.

In this embodiment, the top cover 10 is provided with air holes 26. By adopting the structure, the inside of the top cover 10 is communicated with the outside, and the vacuum of an inner cavity between the spring seat 5 and the top cover 10 is avoided.

In this embodiment, a copper pressing ring 25 is disposed on the valve seat 4 for the control valve element 6 to pass through, and a third rubber ring 18 is disposed between the copper pressing ring 25 and the valve seat 4. By adopting the structure, the control valve core 6 is limited by the copper pressure ring 25, so that the control valve core is prevented from offsetting when moving up and down, and the sealing between the copper pressure ring 25 and the valve seat 4 is realized by the rubber ring III 18.

In this embodiment, the upper portion of the outer wall of the valve housing 1 is sleeved with a first rubber ring 13, and the lower portion of the outer wall of the valve housing 1 is sleeved with a first gasket 14 and a second rubber ring 15. By adopting the structure, the valve sleeve 1 is sealed with the switch valve of the sprinkler.

In this embodiment, a second gasket 16, a third gasket 17 and a second thread sealing glue 29 are disposed between the inner wall of the valve housing 1 and the outer wall of the valve seat 4. With such a structural arrangement, sealing between the inner wall of the valve housing 1 and the outer wall of the valve seat 4 is achieved.

In this embodiment, a rubber ring four 19 is disposed between the outer wall of the valve seat 4 and the inner wall of the oil port connection sleeve 3, a rubber ring five 20 is disposed between the inner wall of the valve seat 4 and the outer wall of the spring seat 5, and a rubber ring six 21 and a thread sealing rubber one 28 are disposed between the outer wall of the valve seat 4 and the inner wall of the connection sleeve 8. By adopting the structure, the sealing between the outer wall of the valve seat 4 and the inner wall of the oil port connecting sleeve 3, the sealing between the inner wall of the valve seat 4 and the outer wall of the spring seat 5 and the sealing between the outer wall of the valve seat 4 and the inner wall of the connecting sleeve 8 are realized.

In this embodiment, a rubber ring seven 22 is arranged between the inner wall of the coupling sleeve 8 and the outer wall of the spring seat 5, and a thread sealing rubber three 37 is arranged between the inner wall of the coupling sleeve 8 and the outer wall of the top cover 10. With this arrangement, sealing between the inner wall of the coupling sleeve 8 and the spring seat 5 and sealing between the inner wall of the coupling sleeve 8 and the outer wall of the top cover 10 are achieved.

While the embodiments of the present invention have been described, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make various modifications without departing from the spirit and scope of the present invention as defined by the appended claims.

Claims

1. A two-way normally closed pneumatic poppet valve is characterized in that: comprises a top cover (10), a connecting ring sleeve (8), a valve seat (4), an oil port connecting sleeve (3) and a valve sleeve (1), wherein the upper part of the connecting ring sleeve (8) is fixedly connected with the top cover (10), the lower part of the connecting ring sleeve (8) is fixedly connected with the upper part of the valve seat (4), the oil port connecting sleeve (3) is rotatably sleeved on the valve seat (4), the lower part of the valve seat (4) is fixedly connected with the valve sleeve (1), a first working port (30) and a second working port (31) are arranged on the valve sleeve (1), a main valve core (2) capable of moving up and down is arranged in the valve sleeve (1), the first working port (30) and the second working port (31) are communicated or closed through the up and down movement of the main valve core (2), a control valve core (6) capable of moving up and down is arranged in the valve seat (4), and a spring seat (5) capable of moving up and down, the upper part of the control valve core (6) is fixed on a spring seat (5) through a set screw (7), the lower part of the control valve core (6) is abutted against a main valve core (2), a spring (9) is arranged between the spring seat (5) and a top cover (10), a first cavity (35) is arranged between the main valve core (2) and a valve seat (4), a first channel (32) and a second channel (33) are arranged on the main valve core (2), one end of the first channel (32) is communicated with the first cavity (35), the other end of the first channel (32) is communicated with a second working opening (31), one end of the second channel (33) is correspondingly blocked with a conical end of the control valve core (6), a steel ball (11) and an elastic pin (12) are arranged in the other end of the second channel (33), a control opening (27) is arranged on the oil port connecting sleeve (3), a third channel (34) and a second cavity (36) are formed between the valve seat (4) and the spring seat (5), one end of the third channel (34) is communicated with the second cavity (36), and the other end of the third channel (34) is communicated with the control port (27).

2. A bi-directional normally closed pneumatic poppet valve as defined in claim 1, wherein: the junction of the first channel (32) and the second working opening (31) is provided with a filter screen (23) and a filter screen compression ring (24), and the filter screen (23) is fixed on the main valve core (2) through the filter screen compression ring (24).

3. A bi-directional normally closed pneumatic poppet valve as defined in claim 1, wherein: the top cover (10) is provided with air holes (26).

4. A bi-directional normally closed pneumatic poppet valve as defined in claim 1, wherein: be equipped with copper clamping ring (25) that be convenient for control case (6) to pass on disk seat (4), be equipped with rubber ring three (18) between copper clamping ring (25) and disk seat (4).

5. A bi-directional normally closed pneumatic poppet valve as defined in claim 1, wherein: the upper part of the outer wall of the valve sleeve (1) is sleeved with a first rubber ring (13), and the lower part of the outer wall of the valve sleeve (1) is sleeved with a first gasket (14) and a second rubber ring (15).

6. A bi-directional normally closed pneumatic poppet valve as defined in claim 1, wherein: and a second gasket (16), a third rubber ring (17) and a second thread sealing glue (29) are arranged between the inner wall of the valve sleeve (1) and the outer wall of the valve seat (4).

7. A bi-directional normally closed pneumatic poppet valve as defined in claim 1, wherein: be equipped with rubber ring four (19) between the outer wall of disk seat (4) and the inner wall of hydraulic fluid port nipple (3), be equipped with rubber ring five (20) between the inner wall of disk seat (4) and the outer wall of spring holder (5), be equipped with rubber ring six (21) and screw thread sealing glue (28) between the outer wall of disk seat (4) and the inner wall of link cover (8).

8. A bi-directional normally closed pneumatic poppet valve as defined in claim 1, wherein: a rubber ring seven (22) is arranged between the inner wall of the connecting ring sleeve (8) and the outer wall of the spring seat (5), and a thread sealing rubber three (37) is arranged between the inner wall of the connecting ring sleeve (8) and the outer wall of the top cover (10).