CN111075957B - Bidirectional on-off control high-pressure pilot electromagnetic valve - Google Patents
Bidirectional on-off control high-pressure pilot electromagnetic valve Download PDFInfo
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- CN111075957B CN111075957B CN201911376531.XA CN201911376531A CN111075957B CN 111075957 B CN111075957 B CN 111075957B CN 201911376531 A CN201911376531 A CN 201911376531A CN 111075957 B CN111075957 B CN 111075957B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
- F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/0263—Construction of housing; Use of materials therefor of lift valves multiple way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/02—Construction of housing; Use of materials therefor of lift valves
- F16K27/029—Electromagnetically actuated valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0603—Multiple-way valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
- F16K31/0675—Electromagnet aspects, e.g. electric supply therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
- F16K31/406—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston
Abstract
The invention belongs to the technical field of high-pressure gas control, and discloses a bidirectional on-off high-pressure pilot electromagnetic valve.A main valve component adopts a split structure, so that the condition that the piston area C of a pilot cavity is larger than the main valve area D and larger than the back pressure piston area E is realized, the gas pressure is converted into equivalent sealing acting force, the reliable action and sealing of high-pressure gas are realized, and the on-off of the high-pressure gas can be controlled by a pilot structure electromagnetic coil only by overcoming small-diameter sealing force and small spring force; the main flow passage is connected with a two-way one-way valve in parallel, the outlet of the two-way one-way valve is only connected with the inlet of the higher pressure end, and the higher pressure can seal the lower pressure end, namely, the gas of the pilot cavity is only connected with the inlet of the higher pressure end, so that the two-way pilot function of the pilot structure is realized; the sealing structure of the main runner adopts a soft material double-boss screw plug to compress and seal, so that the sealing performance and the reliability of the sealing structure are improved to a greater degree. The invention has small volume, light weight and wide application range, and can realize bidirectional on-off pilot electromagnetic control for high-pressure gas within the range of 67.5 MPa.
Description
Technical Field
The invention belongs to the technical field of high-pressure gas control, and particularly relates to a bidirectional on-off control high-pressure pilot electromagnetic valve.
Background
The existing electric control high-pressure sealing structure for gas above 35MPa in China is very lacking, no matter balanced or unloading type pilot electromagnetic control is adopted, bidirectional on-off sealing cannot be reliably realized, and meanwhile, strict requirements are imposed on the sealing pressure range.
Disclosure of Invention
The high-pressure pilot electromagnetic valve has the advantages of small volume, stable and reliable structure, wide control pressure, wide application range, zero air pressure leakage and capability of being switched on and off bidirectionally, and overcomes the defects of the conventional high-pressure electromagnetic valve.
The technical scheme of the invention is as follows:
a bidirectional on-off control high-pressure pilot electromagnetic valve comprises a shell, a first air inlet, a second air inlet, a main valve, a bypass flow channel P, a bypass flow channel Q, a bidirectional one-way valve, a pilot valve and an electromagnet;
the main valve comprises a back pressure cavity piston, a main flow channel cavity F, a main flow channel cavity G, a main valve seat, a main valve, a pilot cavity I and a pilot cavity piston;
the first air inlet is communicated with the main runner cavity F, and the second air inlet is communicated with the main runner cavity G;
the pilot cavity I is positioned above the pilot cavity piston; the main valve is arranged below the pilot cavity piston;
the back pressure cavity piston is positioned below the pilot cavity piston;
the main valve, the pilot cavity piston and the backpressure cavity piston are matched for controlling the on-off of the main flow channel cavity F and the main flow channel cavity G;
the first air inlet is connected with the bypass flow channel P, and the second air inlet is connected with the bypass flow channel Q;
the two-way one-way valve comprises an inlet P, an inlet Q and an outlet, and is used for controlling the on-off of the inlet P or the inlet Q and the outlet;
the bypass flow passage P is connected with an inlet P of the two-way one-way valve, and the bypass flow passage Q is connected with an inlet Q;
the pilot valve comprises a pilot cavity H, a pilot air inlet valve and a pilot air inlet valve opening;
an outlet of the two-way check valve is connected with the pilot cavity H;
the pilot cavity H is connected with the pilot cavity I through a pilot air inlet valve port;
the electromagnet controls the on-off of the pilot air inlet valve through controlling the action of the pilot air inlet valve.
The invention has the technical characteristics and further improvement that:
1. the two-way check valve further comprises a pressure selecting cavity P, a pressure selecting cavity Q, a check valve seat, a check valve return spring, a first check valve and a second check valve;
the bypass flow passage P is connected with the inlet P of the one-way valve through the pressure selecting cavity P;
the bypass flow passage Q is connected with a one-way valve inlet Q through a pressure selecting cavity Q;
the first check valve and the second check valve are fixed in a sealing cavity of the check valve seat through a check valve return spring; the first check valve and the second check valve are symmetrically arranged at the outlet of the check valve.
2. The diameter of the section of the pilot cavity I is the same as that of the section of the pilot cavity piston; the diameter of the section of the pilot cavity piston is larger than that of the section of the main valve; the diameter of the section of the main valve is larger than that of the section of the back pressure piston.
3. The pilot valve also comprises an air inlet spring, and the air inlet spring is used for resetting the pilot air inlet valve.
4. The main valve further comprises a main return spring, and the main return spring is used for resetting the back pressure cavity piston.
5. The pilot valve also comprises a pilot exhaust valve, a pilot exhaust valve opening, an exhaust spring, an exhaust cavity and an exhaust port;
the pilot exhaust valve port is communicated with the pilot intake valve port through a first flow passage of the T-shaped flow passage; the pilot exhaust valve and the pilot intake valve are connected through a connecting rod, the connecting rod is positioned in a first flow passage of the T-shaped flow passage, and the diameter of the connecting rod is smaller than that of the first flow passage; meanwhile, a second flow passage vertical to the first flow passage in the T-shaped flow passage is communicated with the guide cavity I; the exhaust port is communicated with the exhaust cavity; the exhaust spring is arranged between the pilot exhaust valve and the top of the exhaust cavity; the pilot exhaust valve is used for controlling the on-off of the pilot exhaust valve opening.
6. The main valve also comprises an upper sealing pair and a lower sealing pair; the main valve also comprises an upper sealing pair and a lower sealing pair; the upper sealing pair is arranged on the side wall between the main return spring and the main valve opening, and the lower sealing pair is arranged on the side wall below the main return spring; the upper sealing pair and the lower sealing pair are used for sealing high-pressure gas in the main flow channel cavity F or the main flow channel cavity Q together with the shell, the main valve seat, the main valve, the first check valve or the second check valve.
7. The air conditioner also comprises a third air inlet which is communicated with the second air inlet.
The main valve assembly is split, the designed diameter is from large to small, and air pressure zero leakage sealing can be realized. The high-pressure gas acting force is eliminated by adopting the pilot piston type structure, the electromagnet assembly can realize the on-off control of the high-pressure gas only by overcoming the spring force of the pilot valve and the pressure of the small-diameter gas, the on-off of the high-pressure gas can be controlled by the electromagnetic force supplied by the small electromagnetic coil, and the product has the advantages of compact integral structure, small volume and light weight.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure;
in the figure: 1-shell, 2-air inlet spring, 3-pilot air inlet valve, 4-pilot air outlet valve, 5-electromagnet, 6-first one-way valve, 7-one-way valve seat, 8-one-way valve return spring, 9-second one-way valve, 10-pilot chamber piston, 11-main return spring, 12-main valve seat, 13-third air inlet, 14-main valve opening, 15-main flow passage chamber F, 16-main flow passage chamber G, 17-double-way one-way brake outlet, 18-pressure selection chamber P, 19-one-way brake inlet P, 20-pressure selection chamber Q, 21-one-way brake inlet Q, 22-bypass flow passage P, 23-bypass flow passage Q, 24-pilot flow passage, 25-pilot chamber H, 26-pilot chamber I, 27-a pilot inlet valve port, 28-a pilot outlet valve port, 29-a T-shaped flow passage, 30-an exhaust port, 31-a first inlet and 32-a second inlet.
Detailed Description
As shown in fig. 1, a two-way on-off control high-pressure pilot electromagnetic valve includes a housing 1, a first air inlet 31, a second air inlet 32, a main valve, a bypass flow passage P22, a bypass flow passage Q23, a two-way check valve, a pilot valve, and an electromagnet 5; the main valve comprises a back pressure cavity piston, a main flow channel cavity F15, a main flow channel cavity G16, a main valve seat 12, a main valve, a pilot cavity I26 and a pilot cavity piston 10; the first inlet port 31 communicates with the primary flow passage chamber F15, and the second inlet port 32 communicates with the primary flow passage chamber G16; the pilot chamber I26 is located above the pilot chamber piston 10; the main valve is arranged below the pilot cavity piston 10; the back pressure cavity piston is positioned below the pilot cavity piston 10; the main valve, the pilot chamber piston 10 and the back pressure chamber piston are matched to control the on-off of the main flow channel chamber F15 and the main flow channel chamber G16; the first inlet 31 is connected to the bypass flow passage P22, and the second inlet 32 is connected to the bypass flow passage Q23; the two-way check valve comprises an inlet P19, an inlet Q21 and an outlet 17, and is used for controlling the connection and disconnection of the inlet P19 or the inlet Q21 and the outlet 17; the bypass flow passage P22 is connected with the inlet P19 of the two-way check valve, and the bypass flow passage Q23 is connected with the inlet Q21; the pilot valve comprises a pilot cavity H25, a pilot air inlet valve 3 and a pilot air inlet valve opening 27; the two-way check valve outlet 17 is connected with the pilot cavity H25; the pilot cavity H25 is connected with the pilot cavity I26 through a pilot air inlet valve opening 27; the electromagnet 5 controls the operation of the pilot inlet valve 3 so as to control the on-off of the pilot inlet valve opening 27.
Further, the two-way check valve also comprises a pressure selecting cavity P18, a pressure selecting cavity Q20, a check valve seat 7, a check valve return spring 8, a first check valve 6 and a second check valve 9; the bypass flow passage P22 is connected with a one-way valve inlet P19 through a pressure selecting cavity P18; the bypass flow passage Q23 is connected with a one-way valve inlet Q21 through a pressure selecting cavity Q20; the first check valve 6 and the second check valve 9 are fixed in a sealing cavity of the check valve seat 7 through a check valve return spring 8; the first check valve 6 and the second check valve 9 are symmetrically installed with a two-way check valve outlet 17. The first check valve 6 and the second check valve 9 close the check valve inlet P19 and the inlet Q21, respectively, under the action of the check valve return spring 8. The main runner is connected with the two-way check valve in parallel, the outlet of the two-way check valve is only connected with the inlet of the higher pressure end, and meanwhile, the higher pressure can seal the lower pressure end, so that the two-way on-off of the pilot structure can be realized.
Further, the cross-sectional diameter of the pilot chamber I26 is the same as the cross-sectional diameter of the pilot chamber piston 10; the diameter of the section of the pilot cavity piston 10 is larger than that of the main valve; the diameter of the section of the main valve is larger than that of the section of the back pressure cavity piston. The diameters are designed from top to bottom in sequence from large to small, and no matter air is fed from the first air inlet or the second air inlet, the air pressure can always contribute to sealing; namely, the larger the gas pressure is, the higher the actual sealing specific pressure of the main valve port is, and the gas pressure zero leakage sealing can be realized.
Further, the pilot valve also comprises a pilot exhaust valve 4, a pilot exhaust valve opening 28, an exhaust spring 2, an exhaust cavity and an exhaust opening 30; the pilot exhaust valve port 28 communicates with the pilot intake valve port 27 through a first flow passage of the T-shaped flow passage 29; the pilot exhaust valve 4 and the pilot intake valve 3 are connected through a connecting rod, the connecting rod is positioned in a first flow passage of the T-shaped flow passage, and the diameter of the connecting rod is smaller than that of the first flow passage; meanwhile, a second flow passage vertical to the first flow passage in the T-shaped flow passage is communicated with a guide cavity I26; the exhaust port 30 is communicated with the exhaust cavity; the exhaust spring is arranged between the pilot exhaust valve 4 and the top of the exhaust cavity; the pilot exhaust valve 4 is used for controlling the on-off of the pilot exhaust valve opening. The pilot valve also comprises an air inlet spring, and the air inlet spring is used for resetting the pilot air inlet valve 3.
The high-pressure gas acting force is eliminated by adopting the pilot piston type structure, the electromagnet assembly can realize the on-off control of the high-pressure gas only by overcoming the spring force of the pilot valve and the pressure of the small-diameter gas, the on-off of the high-pressure gas can be controlled by the electromagnetic force supplied by the small electromagnetic coil, and the product has the advantages of compact integral structure, small volume and light weight.
Meanwhile, the change of the area of the pilot valve can control the change of the sensitivity of the product.
Further, the main valve further comprises a main return spring 11, and the main return spring 11 is used for resetting the pilot chamber piston 10 and the back pressure chamber piston. The main valve also comprises an upper sealing pair and a lower sealing pair; the main valve also comprises an upper sealing pair and a lower sealing pair; the upper sealing pair is arranged on the side wall between the main return spring 11 and the main valve opening 14, and the lower sealing pair is arranged on the side wall below the main return spring 11; the upper sealing pair and the lower sealing pair are used for sealing high-pressure gas in the main flow channel chamber F15 or the main flow channel chamber G16 together with the shell 1, the main valve seat 12, the main valve, the first check valve 6 or the second check valve 9. The sealing structure of the main runner adopts a soft material double-boss screw plug to compress and seal, so that the sealing performance and the reliability of the sealing structure can be improved to a greater degree. Gas control and sealing up to 67.5MPa pressure can be achieved.
Further, a third intake port 13 is included, and the third intake port 13 communicates with the second intake port 32.
As shown in fig. 2, the working principle of the present invention is as follows:
high-pressure gas enters from the first gas inlet 31; when the electromagnet 5 is powered off, high-pressure gas is limited in the main runner cavity F15 by the shell 1, the main valve seat 12 and the side effects of upper and lower sealing;
high-pressure gas simultaneously enters a pressure selecting cavity P18 through a parallel bypass flow passage P22, overcomes the elasticity of a return spring 8 of the check valve, pushes a second check valve 9 open, opens an inlet P19 of the check valve and enters an outlet 17 of the two-way check valve; meanwhile, the first check valve 6 closes the check valve inlet Q21 under the action of the elastic force of the check valve return spring 8 and the gas pressure entering the check valve;
when the electromagnet 5 is powered off, the gas entering the outlet of the one-way valve is accumulated in the pilot cavity H25 under the sealing action of the shell 1, the pilot air inlet valve 3 and the pilot air inlet valve opening 27;
when the electromagnet 5 is electrified, the electromagnet 5 acts to overcome the elasticity of the air inlet spring and push the pilot exhaust valve 4 to open the pilot air inlet valve opening 27 sealed by the pilot air inlet valve 3, and meanwhile, the pilot exhaust valve 4 continues to move to be attached to the pilot air outlet valve opening 28 and seal the pilot air outlet valve opening 28; the high-pressure gas accumulated in the pilot chamber H25 enters the pilot chamber I26 through the T-shaped flow passage 29;
due to the design of area difference, high-pressure gas pushes the pilot chamber piston 10 and the back pressure chamber piston to act, the main piston port 14 is opened, the main flow passage chamber F15 is communicated with the main flow passage chamber G16, and the high-pressure gas is output through the second gas inlet 32;
when the electromagnet 5 is powered off, the pilot air inlet valve 3 moves upwards under the action of the air inlet spring and the aerodynamic force of the pilot air outlet valve 4, the pilot air inlet valve 3 is attached to the pilot air inlet valve opening 28, and the connection between the pilot cavity H25 and the pilot cavity I26 is cut off; at the same time, the pilot exhaust valve 4 leaves the pilot exhaust valve opening 28; the high-pressure gas in the pilot cavity I26 is exhausted into the atmosphere through the T-shaped flow passage 29, the pilot exhaust valve opening 28 and the exhaust port 30;
the pneumatic force in the pilot chamber I26 disappears, the pilot chamber piston 10 and the back pressure chamber piston are reset under the action of the main return spring 11, and the connection between the main flow passage chamber F15 and the main flow passage chamber Q16 is cut off.
In addition, high pressure gas may also enter from the second gas inlet 32; when the electromagnet 5 is powered off, high-pressure gas is limited in the main flow passage chamber G16 by the shell 1, the main valve seat 12 and the side effects of upper and lower sealing;
high-pressure gas simultaneously enters a pressure selecting cavity Q20 through a parallel bypass flow passage Q23, overcomes the elasticity of a return spring 8 of the check valve, pushes open a first check valve 6, opens an inlet Q21 of the check valve and enters an outlet 17 of the check valve; meanwhile, the second check valve 9 closes the check valve inlet P19 under the action of the elastic force of the check valve return spring 8 and the gas pressure entering the check valve;
when the electromagnet 5 is powered off, the gas entering the outlet of the one-way valve is accumulated in the pilot cavity H25 under the sealing action of the shell 1, the pilot air inlet valve 3 and the pilot air inlet valve opening 27;
when the electromagnet 5 is electrified, the electromagnet 5 acts to overcome the elasticity of the air inlet spring 2, push the pilot exhaust valve 4 to open the pilot air inlet valve opening 27 sealed by the pilot air inlet valve 3, and meanwhile, the pilot exhaust valve 4 continues to move to be attached to the pilot air outlet valve opening 28 and seal the pilot air outlet valve opening 28; the high-pressure gas accumulated in the pilot chamber H25 enters the pilot chamber I26 through the T-shaped flow passage 29;
due to the design of area difference, high-pressure gas pushes the pilot chamber piston 10 and the back pressure chamber piston to act, the main piston port 14 is opened, the main flow passage chamber F15 is communicated with the main flow passage chamber G16, and the high-pressure gas is output through the first gas inlet 31;
when the electromagnet is powered off, the pilot air inlet valve 3 moves upwards under the action of the air inlet spring 2 and aerodynamic force of the pilot air outlet valve 4, the pilot air inlet valve 3 is attached to the pilot air inlet valve opening 27, and the connection between the pilot cavity H25 and the pilot cavity I26 is cut off; at the same time, the pilot exhaust valve 4 leaves the pilot exhaust valve opening 28; the high-pressure gas in the pilot cavity I26 is exhausted into the atmosphere through the T-shaped flow passage 29, the pilot exhaust valve opening 28 and the exhaust port 30;
the pneumatic force in the pilot chamber I26 disappears, the pilot chamber piston 10 and the back pressure chamber piston are reset under the action of the main return spring 11, and the connection between the main flow passage chamber F15 and the main flow passage chamber Q16 is cut off.
Claims (8)
1. A bidirectional on-off control high-pressure pilot electromagnetic valve is characterized in that the electromagnetic valve comprises a shell, a first air inlet, a second air inlet, a main valve, a bypass flow passage P, a bypass flow passage Q, a two-way one-way valve, a pilot valve and an electromagnet;
the main valve comprises a back pressure cavity piston, a main flow channel cavity F, a main flow channel cavity G, a main valve seat, a main valve, a pilot cavity I and a pilot cavity piston;
the first air inlet is communicated with the main runner cavity F, and the second air inlet is communicated with the main runner cavity G;
the pilot cavity I is positioned above the pilot cavity piston; the main valve is arranged below the pilot cavity piston;
the back pressure cavity piston is positioned below the pilot cavity piston;
the main valve, the pilot cavity piston and the backpressure cavity piston are matched for controlling the on-off of the main flow channel cavity F and the main flow channel cavity G;
the first air inlet is connected with the bypass flow channel P, and the second air inlet is connected with the bypass flow channel Q;
the two-way one-way valve comprises an inlet P, an inlet Q and an outlet, and is used for controlling the on-off of the inlet P or the inlet Q and the outlet;
the bypass flow passage P is connected with an inlet P of the two-way one-way valve, and the bypass flow passage Q is connected with an inlet Q;
the pilot valve comprises a pilot cavity H, a pilot air inlet valve and a pilot air inlet valve opening;
an outlet of the two-way check valve is connected with the pilot cavity H;
the pilot cavity H is connected with the pilot cavity I through a pilot air inlet valve port;
the electromagnet controls the on-off of the pilot air inlet valve through controlling the action of the pilot air inlet valve.
2. The bidirectional on-off control high-pressure pilot solenoid valve according to claim 1, characterized in that: the two-way check valve further comprises a pressure selecting cavity P, a pressure selecting cavity Q, a check valve seat, a check valve return spring, a first check valve and a second check valve;
the bypass flow passage P is connected with the inlet P of the one-way valve through the pressure selecting cavity P;
the bypass flow passage Q is connected with a one-way valve inlet Q through a pressure selecting cavity Q;
the first check valve and the second check valve are fixed in a sealing cavity of the check valve seat through a check valve return spring; the first check valve and the second check valve are symmetrically arranged at the outlet of the check valve.
3. The bidirectional on-off control high-pressure pilot solenoid valve according to claim 2, characterized in that:
the diameter of the section of the pilot cavity I is the same as that of the section of the pilot cavity piston; the diameter of the section of the pilot cavity piston is larger than that of the section of the main valve; the diameter of the section of the main valve is larger than that of the section of the back pressure piston.
4. A bi-directional on-off control high pressure pilot solenoid valve as claimed in claim 3, wherein: the pilot valve also comprises an air inlet spring, and the air inlet spring is used for resetting the pilot air inlet valve.
5. The bidirectional on-off control high-pressure pilot solenoid valve according to claim 4, characterized in that: the main valve further comprises a main return spring, and the main return spring is used for resetting the back pressure cavity piston.
6. The bidirectional on-off control high-pressure pilot solenoid valve according to claim 5, characterized in that: the pilot valve also comprises a pilot exhaust valve, a pilot exhaust valve opening, an exhaust spring, an exhaust cavity and an exhaust port;
the pilot exhaust valve port is communicated with the pilot intake valve port through a first flow passage of the T-shaped flow passage; the pilot exhaust valve and the pilot intake valve are connected through a connecting rod, the connecting rod is positioned in a first flow passage of the T-shaped flow passage, and the diameter of the connecting rod is smaller than that of the first flow passage; meanwhile, a second flow passage vertical to the first flow passage in the T-shaped flow passage is communicated with the guide cavity I; the exhaust port is communicated with the exhaust cavity; the exhaust spring is arranged between the pilot exhaust valve and the top of the exhaust cavity; the pilot exhaust valve is used for controlling the on-off of the pilot exhaust valve opening.
7. The bidirectional on-off control high-pressure pilot solenoid valve according to claim 6, characterized in that: the main valve also comprises an upper sealing pair and a lower sealing pair; the upper sealing pair is arranged on the side wall between the main return spring and the main valve opening, and the lower sealing pair is arranged on the side wall below the main return spring; the upper sealing pair and the lower sealing pair are used for sealing high-pressure gas in the main flow channel cavity F or the main flow channel cavity Q together with the shell, the main valve seat, the main valve, the first check valve or the second check valve.
8. The bidirectional on-off control high-pressure pilot solenoid valve according to claim 1, characterized in that: the air conditioner also comprises a third air inlet which is communicated with the second air inlet.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911376531.XA CN111075957B (en) | 2019-12-27 | 2019-12-27 | Bidirectional on-off control high-pressure pilot electromagnetic valve |
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| CN201911376531.XA CN111075957B (en) | 2019-12-27 | 2019-12-27 | Bidirectional on-off control high-pressure pilot electromagnetic valve |
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| CN111075957A CN111075957A (en) | 2020-04-28 |
| CN111075957B true CN111075957B (en) | 2022-02-22 |
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| CN112855643B (en) * | 2021-01-12 | 2022-08-16 | 宜宾三江机械有限责任公司 | Solenoid valve control circuit and double-circuit solenoid valve that constitutes thereof |
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| CN101655165B (en) * | 2008-08-21 | 2012-01-04 | 上海立新液压有限公司 | Novel three-way pressure reducing valve |
| CN103062462B (en) * | 2012-12-27 | 2014-12-24 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Incremental digital plug-in mounting overflow valve |
| DE102017212331A1 (en) * | 2017-07-19 | 2019-01-24 | Continental Teves Ag & Co. Ohg | Electromagnetic valve, in particular for slip-controlled motor vehicle brake systems |
| EP3460329B1 (en) * | 2017-09-20 | 2020-01-15 | Copreci, S.Coop. | Electromagnetic gas valve, gas regulating valve and gas cooking appliance |
| CN109654255B (en) * | 2017-10-11 | 2020-06-09 | 中国航发西安动力控制科技有限公司 | Bidirectional pilot pressure regulating valve |
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|---|---|
| CN111075957A (en) | 2020-04-28 |
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