CN115559830B - Electromagnetic pilot control valve - Google Patents
Electromagnetic pilot control valve Download PDFInfo
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- CN115559830B CN115559830B CN202211208046.3A CN202211208046A CN115559830B CN 115559830 B CN115559830 B CN 115559830B CN 202211208046 A CN202211208046 A CN 202211208046A CN 115559830 B CN115559830 B CN 115559830B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/44—Feeding propellants
- F02K9/56—Control
- F02K9/58—Propellant feed valves
Abstract
The application provides an electromagnetic pilot control valve, which comprises a main valve unit and an electromagnetic pilot valve unit, wherein an inlet, an outlet and a first exhaust port are arranged in the main valve unit, the inlet is used for introducing working medium, the outlet is used for discharging the working medium, and the first exhaust port is used for discharging residual medium; the main valve unit is connected with the inlet end of the electromagnetic pilot valve unit through a medium inflow channel, and the outlet end of the electromagnetic pilot valve unit is connected with the main valve unit through a medium outflow channel; the electromagnetic pilot valve unit is provided with a second exhaust port; the second exhaust port is used for exhausting residual medium; the electromagnetic pilot valve unit is used for opening or closing a communication channel of the electromagnetic pilot valve unit and the main valve unit, so that working medium flowing in through the inlet can drive the inlet to be communicated with or separated from the outlet, and the opening or closing of the main valve unit is realized. The application can realize the action requirement of opening or closing control by the working medium, and can eliminate the dependence on a control system.
Description
Technical Field
The application belongs to the field of control valves, and particularly relates to an electromagnetic pilot control valve.
Background
The electromagnetic pilot control valve can be widely applied to a propellant supply system in a normal-temperature environment of the space engine. Valves for rocket engine propellant supply systems typically require high pressure control gas as a control element, which requires the addition of control systems, such as those comprised of components such as cylinders, conduits, and control valves with high pressure control gas. Because the control system is added, the structure, the layout and the weight of the engine are increased, and the control system also has the problems that the air source is insufficient to control the valve and the like due to leakage risk, the use requirement of commercial aerospace is difficult to meet; therefore, the inventor finds that technical breakthrough is required in the aspect of realizing the valve structure in the research and development process, so that the action requirement of controlling opening or closing of the engine valve is realized, and the dependence on a control system is reduced.
Disclosure of Invention
In order to overcome the problems in the related art to at least a certain extent, the present application provides an electromagnetic pilot control valve.
According to an embodiment of the present application, the present application provides an electromagnetic pilot control valve, which includes a main valve unit and an electromagnetic pilot valve unit, wherein an inlet, an outlet and a first exhaust port are provided in the main valve unit, the inlet is used for introducing a working medium, the outlet is used for discharging the working medium, and the first exhaust port is used for discharging a residual medium;
the main valve unit is connected with the inlet end of the electromagnetic pilot valve unit through a medium inflow channel, and the outlet end of the electromagnetic pilot valve unit is connected with the main valve unit through a medium outflow channel;
a second exhaust port is arranged in the electromagnetic pilot valve unit; the second exhaust port is used for exhausting residual medium;
the electromagnetic pilot valve unit is used for opening or closing a communication channel of the electromagnetic pilot valve unit and the main valve unit, so that working medium flowing in through the inlet can drive the inlet to be communicated with or separated from the outlet, and the opening or closing of the main valve unit is realized;
the electromagnetic pilot valve unit comprises a left valve cover, a right valve cover and an electromagnetic assembly; the left valve cover and the right valve cover are respectively and fixedly connected to two ends of the electromagnetic assembly in the length direction; the electromagnetic assembly comprises an electromagnetic shell and a coil arranged in the electromagnetic shell;
an elastic opening and closing piece is arranged between the left valve cover and the electromagnetic assembly and is used for pressing or opening a sealing surface in the length direction of the electromagnetic shell;
a pilot valve core and a pilot spring are arranged between the right valve cover and the electromagnetic assembly; an exhaust hole is formed in the right valve cover, and an exhaust valve core is arranged in the exhaust hole; the pilot valve core is connected with the exhaust valve core;
the pilot valve core is used for driving the exhaust valve core to be pressed on the sealing surface of the right valve cover after overcoming the elasticity of the pilot spring when the coil is electrified and pushing the elastic opening and closing piece to open the sealing surface of the electromagnetic shell in the length direction; the elastic opening and closing piece is used for pushing the pilot valve core to move in a direction away from the left valve cover when the coil is powered off, the pilot valve core drives the exhaust valve core to be separated from the sealing surface of the right valve cover, and the elastic opening and closing piece is tightly pressed on the sealing surface of the electromagnetic shell in the length direction.
In the electromagnetic pilot control valve, an inlet cavity, an outlet cavity, an exhaust cavity and a working cavity which can be mutually communicated are sequentially arranged in the main shell; the inlet is arranged at the inlet cavity, and the inlet cavity is connected with the inlet end of the electromagnetic pilot valve unit through the medium inflow channel; the outlet is arranged at the outlet cavity, the first exhaust port is arranged at the exhaust cavity, and the working cavity is connected with the outlet end of the electromagnetic pilot valve unit through the medium outflow channel.
Further, the main valve unit comprises a main shell, a main valve core, a main spring, a piston, a push rod and a corrugated pipe;
the main valve core stretches across the inlet cavity, the outlet cavity and the exhaust cavity along the length direction of the main shell and is used for controlling the on-off of the inlet cavity and the outlet cavity and the on-off of the outlet cavity and the exhaust cavity;
the main spring is arranged in the inlet cavity, one end of the main spring is connected with the side wall of the inlet cavity along the length direction of the main shell, and the other end of the main spring is connected with one end of the main valve core;
the push rod spans the exhaust cavity and the working cavity along the length direction of the main shell, and the piston and the bellows are arranged in the working cavity; one end of the push rod is connected with the other end of the main valve core, and the other end of the push rod is connected with the piston; one end of the bellows is connected with the piston, and the other end of the bellows is connected with the side wall of the main shell, close to the exhaust cavity, of the working cavity, so that dynamic seal is formed between the piston and the side wall of the main shell, close to the exhaust cavity, of the working cavity.
Further, a discharge channel is arranged between the inner cavity of the corrugated pipe and the exhaust cavity in the working cavity, and the discharge channel is used for communicating the inner cavity of the corrugated pipe with the exhaust cavity.
Furthermore, the main valve core adopts a cylindrical structure with two horn-shaped ends, and the two ends of the main valve core are used for switching on and switching off the inlet cavity and the outlet cavity and the exhaust cavity.
Further, the elastic opening and closing piece comprises an auxiliary spring and a steel ball, a first assembly hole is formed in one end, connected with the left valve cover, of the electromagnetic shell, and one end, connected with the electromagnetic shell, of the left valve cover is installed in the first assembly hole;
the left valve cover is provided with a first inner hole at one end connected with the electromagnetic assembly, the auxiliary spring is arranged in the first inner hole, one end of the auxiliary spring is connected with the bottom of the first inner hole in the length direction, and the other end of the auxiliary spring is in contact with the steel ball.
Further, a second assembly hole is formed in one end, connected with the right valve cover, of the electromagnetic shell, and the second assembly hole is matched with the contour of the pilot valve core; a second inner hole is formed in the outer side of the second assembly hole along the circumferential direction of the second assembly hole; the pilot valve core is arranged in the second assembly hole, and the pilot spring is arranged in the second inner hole.
Further, a first channel, a second channel and a third channel are arranged in the pilot valve core, one end of the first channel is communicated with the second channel, the other end of the first channel is communicated with the third channel, and the third channel is communicated with the medium outflow channel.
Further, the left valve cover adopts a T-shaped structure, a fifth channel is arranged in the transverse part of the T-shaped structure, a sixth channel is arranged along the circumferential direction of the fifth channel from the side wall of the fifth channel, the fifth channel is communicated with the sixth channel and the medium inflow channel, and the sixth channel is communicated with a fourth channel formed by one end, connected with the left valve cover, of the first assembly hole; the fourth channel is used for communicating with the second channel under the control of the steel ball.
Further, a first boss is arranged at the end part of the pilot valve core of the second channel and is used for pushing the steel ball; the end part of the pilot valve core of the third channel is provided with a second boss, and the second boss is used for extending into the exhaust hole to be connected with the exhaust valve core.
According to the above specific embodiments of the present application, at least the following advantages are achieved: the electromagnetic pilot control valve provided by the application is characterized in that a main valve unit and an electromagnetic pilot valve unit are arranged, the main valve unit is connected with the inlet end of the electromagnetic pilot valve unit through a medium inflow channel, and the outlet end of the electromagnetic pilot valve unit is connected with the main valve unit through a medium outflow channel; the electromagnetic pilot valve unit opens or closes a communication channel thereof with the main valve unit by utilizing electromagnetic force, so that working medium flowing in through the inlet can drive the inlet to be communicated with or blocked off from the outlet, and the opening or closing of the main valve unit is realized; the electromagnetic pilot control valve provided by the application is opened or closed by means of a working medium during working, and a high-pressure control gas and control system is not needed, so that the structure of the engine can be simplified, and part of weight can be reduced.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the scope of the application, as claimed.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description, serve to explain the principles of the application.
Fig. 1 is a schematic structural diagram of an electromagnetic pilot control valve according to an embodiment of the present application.
Fig. 2 is a schematic structural diagram of a pilot valve core in an electromagnetic pilot control valve according to an embodiment of the present application.
Reference numerals illustrate:
1. a main valve unit; 11. an inlet; 12. an outlet; 13. a first exhaust port; 14. a main housing; 15. a main spool; 16. a main spring; 17. a piston; 18. a push rod; 19. a bellows; 101. an inlet chamber; 102. an outlet chamber; 103. an exhaust chamber; 104. a working chamber; 105. a discharge passage;
2. an electromagnetic pilot valve unit;
20. a second exhaust port;
21. a left valve cover; 211. a first bore; 212. a fifth channel; 213. a sixth channel;
22. a right valve cover; 221. an exhaust hole;
23. an electromagnetic assembly; 231. an electromagnetic housing; 2311. a second fitting hole; 2312. a second bore; 232. a coil; 233. a first fitting hole; 2331. a fourth channel;
24. an auxiliary spring; 25. a steel ball;
26. a pilot spool; 261. a first channel; 262. a second channel; 263. a third channel; 264. a first boss; 265. a second boss;
27. a pilot spring; 28. an exhaust valve core;
3. a medium inflow passage;
4. the medium flows out of the channel.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present application more apparent, the spirit of the present disclosure will be clearly described in the following drawings and detailed description, and any person skilled in the art, after having appreciated the embodiments of the present disclosure, may make alterations and modifications by the techniques taught by the present disclosure without departing from the spirit and scope of the present disclosure.
The exemplary embodiments of the present application and the descriptions thereof are intended to illustrate the present application, but not to limit the present application. In addition, the same or similar reference numerals are used for the same or similar parts in the drawings and the embodiments.
The terms "first," "second," …, and the like, as used herein, do not denote a particular order or sequence, nor are they intended to limit the application, but rather are merely used to distinguish one element or operation from another in the same technical term.
As used herein, the terms "comprising," "including," "having," "containing," and the like are intended to be inclusive and mean an inclusion, but not limited to.
As used herein, "and/or" includes any or all combinations of such things.
Reference herein to "a plurality" includes "two" and "more than two"; the term "plurality of sets" as used herein includes "two sets" and "more than two sets".
Certain words used to describe the application will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the application.
As shown in fig. 1, the electromagnetic pilot control valve provided by the embodiment of the application comprises a main valve unit 1 and an electromagnetic pilot valve unit 2, wherein an inlet 11, an outlet 12 and a first exhaust port 13 are arranged in the main valve unit 1, the inlet 11 of the main valve unit 1 is used for introducing working medium, the inner outlet end of the main valve unit is connected with the inlet end of the electromagnetic pilot valve unit 2 through a medium inflow channel 3, and the outlet end of the electromagnetic pilot valve unit 2 is connected with the inner inlet end of the main valve unit 1 through a medium outflow channel 4. The outlet end of the electromagnetic pilot valve unit 2 is provided with a second exhaust port 20.
The electromagnetic pilot valve unit 2 opens or closes a communication passage of the electromagnetic pilot valve unit 2 and the main valve unit 1 by electromagnetic force, so that the working medium flowing in through the inlet 11 in the main valve unit 1 can drive the inlet 11 and the outlet 12 to communicate or shut off to achieve opening or closing of the main valve unit 1.
The electromagnetic pilot control valve provided by the embodiment of the application is of a normally closed structure, is opened or closed by means of a working medium, does not need to use a high-pressure control gas and control system during working, and can simplify the structure of an engine and reduce part of weight.
In a specific embodiment, the main valve unit 1 comprises a main housing 14, a main spool 15, a main spring 16, a piston 17, a push rod 18 and a bellows 19. Wherein, the main housing 14 is provided with an inlet chamber 101, an outlet chamber 102, an exhaust chamber 103 and a working chamber 104 which can be communicated with each other in sequence.
The inlet 11 is arranged at the inlet cavity 101, and working medium can be introduced into the inlet cavity 101 through the inlet 11; the inlet chamber 101 is connected to the inlet end of the electromagnetic pilot valve unit 2 through a medium inflow channel 3. The outlet 12 is arranged at the outlet chamber 102, through which outlet 12 the working medium can be discharged. The first exhaust port 13 is provided at the exhaust chamber 103, and the medium remaining in the outlet chamber 102 can be discharged through the first exhaust port 13. The working chamber 104 is connected to the outlet end of the electromagnetic pilot valve unit 2 through a medium outflow channel 4.
The main valve core 15 spans in the inlet cavity 101, the outlet cavity 102 and the exhaust cavity 103 along the length direction of the main housing 14, and the main valve core 15 forms two seals with the side walls of the main housing 14 at the inlet cavity 101, the outlet cavity 102 and the exhaust cavity 103, and is used for controlling the on-off of the inlet cavity 101 and the outlet cavity 102 and the on-off of the outlet cavity 102 and the exhaust cavity 103 respectively.
The main spring 16 is provided in the inlet chamber 101, one end of the main spring 16 is connected to a side wall of the inlet chamber 101 along the length direction of the main housing 14, and the other end is connected to one end of the main spool 15.
The push rod 18 spans the exhaust chamber 103 and the working chamber 104 along the length of the main housing 14, and the piston 17 and the bellows 19 are disposed in the working chamber 104. One end of the push rod 18 is connected to the other end of the main valve element 15, and the other end is connected to the piston 17. One end of the bellows 19 is connected to the piston 17 and the other end is connected to the side wall of the main housing 14 of the working chamber 104 near the exhaust chamber 103, so that the piston 17 forms a dynamic seal with the side wall of the main housing 14 of the working chamber 104 near the exhaust chamber 103, by which the exhaust chamber 103 and the working chamber 104 are isolated.
When the bellows 19 moves left and right along the length direction of the main housing 14, in order to prevent the inner cavity of the bellows 19 from generating holding pressure, a discharge channel 105 is arranged between the inner cavity of the bellows 19 and the exhaust cavity 103 in the working cavity 104, and the discharge channel 105 can be communicated with the inner cavity of the bellows 19 and the exhaust cavity 103, so that medium in the bellows 19 can be timely discharged through the exhaust cavity 103, and back pressure which is unfavorable for the opening of the main valve unit 1 is prevented.
Specifically, the main valve element 15 adopts a cylindrical structure with bell mouth-shaped ends, and under the action of the piston 17, the push rod 18 and the main spring 16, the two ends of the main valve element 15 can be used for switching on and switching off the inlet cavity 101 and the outlet cavity 102 and the exhaust cavity 103.
In a specific embodiment, the electromagnetic pilot valve unit 2 comprises a left valve cover 21, a right valve cover 22 and an electromagnetic assembly 23. Wherein, left valve gap 21 and right valve gap 22 are fixed connection respectively at electromagnetic assembly 23 length direction's both ends.
The electromagnetic assembly 23 includes an electromagnetic housing 231 and a coil 232 disposed in the electromagnetic housing 231. The electromagnetic housing 231 is provided with a first fitting hole 233 at one end connected to the left valve cover 21. One end of the left valve cover 21 connected to the electromagnetic housing 231 is installed in the first fitting hole 233.
An elastic opening and closing member is arranged between the left valve cover 21 and the electromagnetic assembly 23, the elastic opening and closing member comprises an auxiliary spring 24 and a steel ball 25, a first inner hole 211 is formed in one end, connected with the electromagnetic assembly 23, of the left valve cover 21, the auxiliary spring 24 is arranged in the first inner hole 211, one end of the auxiliary spring is connected with the bottom of the first inner hole 211 in the length direction, and the other end of the auxiliary spring is used for pushing the steel ball 25, so that the steel ball 25 can be tightly pressed on a sealing surface of the electromagnetic shell 231 in the length direction to form a seal.
A pilot spool 26 and a pilot spring 27 are provided between the right valve cover 22 and the solenoid assembly 23.
A second assembly hole 2311 is formed at one end of the electromagnetic housing 231 connected to the right cap 22. A second inner hole 2312 is opened at the outer side of the second fitting hole 2311 in the circumferential direction of the second fitting hole 2311. The pilot spool 26 is disposed in the second fitting hole 2311, and the pilot spring 27 is disposed in the second inner hole 2312. The pilot spring 27 presses the pilot spool 26 against the end face of the end of the right valve cover 22 to which the solenoid assembly 23 is connected. The second fitting hole 2311 is provided in matching with the contour of the pilot spool 26.
An exhaust hole 221 is provided in the right valve cover 22. The exhaust valve core 28 is provided in the exhaust hole 221.
As shown in fig. 2, a first channel 261, a second channel 262 and a third channel 263 are provided inside the pilot valve 26 along the length direction of the pilot valve 26, one end of the first channel 261 communicates with the second channel 262, the other end communicates with the third channel 263, and the third channel 263 communicates with the medium outflow channel 4. At the end of the pilot spool 26 of the second passage 262 is provided a first boss 264, the first boss 264 being for pushing the steel ball 25. A second boss 265 is provided at an end of the pilot spool 26 of the third passage 263, and the second boss 265 is adapted to extend into the exhaust hole 221 to be connected with the exhaust valve core 28.
Under the action of electromagnetic force, the pilot valve core 26 moves towards the direction of the steel ball 25 with the exhaust valve core 28, and the exhaust valve core 28 is pressed on the sealing surface of the right valve cover 22, so that the working cavity 104 is isolated from the second exhaust port 20; the first boss 264 pushes the steel ball 25 to move in a direction away from the sealing surface of the electromagnetic housing 231 in the length direction, so that the fourth passage 2331 formed at the end of the first fitting hole 233 connected to the left valve cover 21 (since the end of the left valve cover 21 connected to the electromagnetic housing 231 is smaller in size than the first fitting hole 233, when the end of the left valve cover 21 connected to the electromagnetic housing 231 is installed in the first fitting hole 233, a passage space, that is, the fourth passage 2331) is formed between the side wall of the end of the left valve cover 21 connected to the electromagnetic housing 231 and the side wall of the electromagnetic housing 231 at the first fitting hole 233, and is in communication with the second passage 262 in the pilot spool 26 provided in the second fitting hole 2311, thereby allowing the working medium in the inlet chamber 101 of the main spool 15 to flow into the working chamber 104 of the main spool 15 through the medium inflow passage 3, the electromagnetic assembly 23, and the medium outflow passage 4.
In the present embodiment, the left valve cover 21 adopts a T-shaped structure, and the first inner hole 211 is provided in a lateral portion of the T-shaped structure. A fifth passage 212 is further provided in the lateral portion of the T-shaped structure, and a sixth passage 213 is provided in the circumferential direction of the fifth passage 212 from the side wall of the fifth passage 212, the fifth passage 212 communicating with the sixth passage 213. The sixth passage 213 communicates with a fourth passage 2331 formed at an end where the first fitting hole 233 and the left valve cover 21 are connected.
After the electromagnetic pilot control valve provided by the embodiment of the application is assembled, the main spring 16 pushes the main valve core 15 out towards the direction of the piston 17 along the length direction of the main shell 14, so that the main valve core 15 isolates the inlet cavity 101 from the outlet cavity 102, and the outlet cavity 102 is communicated with the exhaust cavity 103. The auxiliary spring 24 in the electromagnetic pilot valve pushes the steel ball 25 to be pressed at the sealing surface in the length direction of the electromagnetic shell 231, the inlet cavity 101 and the working cavity 104 are cut off, and the working cavity 104 is communicated with the second exhaust port 20.
When the coil 232 is electrified, the pilot valve core 26 moves towards the direction approaching the left valve cover 21 after overcoming the elastic force of the pilot spring 27 under the action of electromagnetic force, so that the exhaust valve core 28 is driven to be pressed on the sealing surface of the right valve cover 22, and the working cavity 104 is isolated from the second exhaust port 20; during the movement of the pilot spool 26 in the direction approaching the left valve cover 21, the first boss 264 pushes the steel ball 25 to move in the direction away from the sealing surface in the length direction of the electromagnetic housing 231, so that the fourth channel 2331 communicates with the second channel 262, and the working medium in the inlet chamber 101 may sequentially pass through the medium inflow channel 3, the fifth channel 212, the sixth channel 213, the fourth channel 2331, the second channel 262, the first channel 261, the third channel 263 and the medium outflow channel 4 to enter the working chamber 104. The working medium in the working chamber 104 pushes the piston 17 to move towards the inlet chamber 101, the piston 17 pushes the main valve core 15 to move towards the direction close to the inlet chamber 101 through the push rod 18, the main valve core 15 cuts off the outlet chamber 102 and the exhaust chamber 103, the inlet chamber 101 and the outlet chamber 102 are communicated, and the electromagnetic pilot control valve works.
When the coil 232 is powered off, the pilot valve core 26 moves away from the left valve cover 21 under the action of the elastic force of the pilot spring 27, so as to drive the exhaust valve core 28 to be separated from the sealing surface of the right valve cover 22, and the working cavity 104 is communicated with the second exhaust port 20; in the process that the pilot valve core 26 moves towards the direction away from the left valve cover 21, the steel ball 25 is pressed on the sealing surface of the electromagnetic shell 231 in the length direction again under the action of the elastic force of the auxiliary spring 24, the fourth channel 2331 and the second channel 262 are separated, so that working medium cannot enter the working cavity 104, the working medium in the working cavity 104 is discharged to the second exhaust port 20 through the medium outflow channel 4 and a seventh channel 2313 formed by connecting the second boss 265 of the pilot valve core 26 with the right valve cover 22 (wherein the seventh channel 2313 is arranged on one side of the exhaust hole 221, and because the size of the second boss 265 is smaller than that of a channel at the joint of the second boss 265 and the right valve cover 22, when the second boss 265 stretches into the exhaust hole 221, a channel space is formed by the side wall of the channel at the joint of the second boss 265 and the right valve cover 22, and the channel space is the seventh channel 2313), and the working cavity 104 is decompressed. The main valve core 15 moves away from the inlet cavity 101 under the action of the elastic force of the main spring 16, the main valve core 15 cuts off the inlet cavity 101 and the outlet cavity 102, and the electromagnetic pilot control valve is closed; the main spool 15 communicates with the outlet chamber 102 and the exhaust chamber 103, and the working medium remaining in the outlet chamber 102 can be discharged through an exhaust port in the exhaust chamber 103.
After an electromagnetic pilot valve unit 2 in the electromagnetic pilot control valve provided by the embodiment of the application is opened, a working medium enters a working cavity 104 through an inlet cavity 101, a medium inflow channel 3, the electromagnetic pilot valve unit 2 and a medium outflow channel 4, so that a main valve unit 1 is opened; after the electromagnetic pilot valve unit 2 is closed, the working medium in the working chamber 104 is timely discharged from the second exhaust port 20. The electromagnetic pilot control valve provided by the embodiment of the application can realize the action requirement of controlling to open or close by itself, and eliminates the dependence on a control system.
The foregoing is merely illustrative of the embodiments of this application and any equivalent and equivalent changes and modifications can be made by those skilled in the art without departing from the spirit and principles of this application.
Claims (10)
1. The electromagnetic pilot control valve is characterized by comprising a main valve unit and an electromagnetic pilot valve unit, wherein an inlet, an outlet and a first exhaust port are arranged in the main valve unit, the inlet is used for introducing working medium, the outlet is used for discharging the working medium, and the first exhaust port is used for discharging residual medium;
the main valve unit is connected with the inlet end of the electromagnetic pilot valve unit through a medium inflow channel, and the outlet end of the electromagnetic pilot valve unit is connected with the main valve unit through a medium outflow channel;
a second exhaust port is arranged in the electromagnetic pilot valve unit; the second exhaust port is used for exhausting residual medium;
the electromagnetic pilot valve unit is used for opening or closing a communication channel of the electromagnetic pilot valve unit and the main valve unit, so that working medium flowing in through the inlet can drive the inlet to be communicated with or separated from the outlet, and the opening or closing of the main valve unit is realized;
the electromagnetic pilot valve unit comprises a left valve cover, a right valve cover and an electromagnetic assembly; the left valve cover and the right valve cover are respectively and fixedly connected to two ends of the electromagnetic assembly in the length direction; the electromagnetic assembly comprises an electromagnetic shell and a coil arranged in the electromagnetic shell;
an elastic opening and closing piece is arranged between the left valve cover and the electromagnetic assembly and is used for pressing or opening a sealing surface in the length direction of the electromagnetic shell;
a pilot valve core and a pilot spring are arranged between the right valve cover and the electromagnetic assembly; an exhaust hole is formed in the right valve cover, and an exhaust valve core is arranged in the exhaust hole; the pilot valve core is connected with the exhaust valve core;
the pilot valve core is used for driving the exhaust valve core to be pressed on the sealing surface of the right valve cover after overcoming the elasticity of the pilot spring when the coil is electrified and pushing the elastic opening and closing piece to open the sealing surface of the electromagnetic shell in the length direction; the elastic opening and closing piece is used for pushing the pilot valve core to move in a direction away from the left valve cover when the coil is powered off, the pilot valve core drives the exhaust valve core to be separated from the sealing surface of the right valve cover, and the elastic opening and closing piece is tightly pressed on the sealing surface of the electromagnetic shell in the length direction.
2. The electromagnetic pilot control valve according to claim 1, wherein an inlet chamber, an outlet chamber, an exhaust chamber and a working chamber which can be communicated with each other are sequentially provided in the main housing; the inlet is arranged at the inlet cavity, and the inlet cavity is connected with the inlet end of the electromagnetic pilot valve unit through the medium inflow channel; the outlet is arranged at the outlet cavity, the first exhaust port is arranged at the exhaust cavity, and the working cavity is connected with the outlet end of the electromagnetic pilot valve unit through the medium outflow channel.
3. The electromagnetic pilot control valve of claim 2, wherein the main valve unit comprises a main housing, a main spool, a main spring, a piston, a pushrod, and a bellows;
the main valve core stretches across the inlet cavity, the outlet cavity and the exhaust cavity along the length direction of the main shell and is used for controlling the on-off of the inlet cavity and the outlet cavity and the on-off of the outlet cavity and the exhaust cavity;
the main spring is arranged in the inlet cavity, one end of the main spring is connected with the side wall of the inlet cavity along the length direction of the main shell, and the other end of the main spring is connected with one end of the main valve core;
the push rod spans the exhaust cavity and the working cavity along the length direction of the main shell, and the piston and the bellows are arranged in the working cavity; one end of the push rod is connected with the other end of the main valve core, and the other end of the push rod is connected with the piston; one end of the bellows is connected with the piston, and the other end of the bellows is connected with the side wall of the main shell, close to the exhaust cavity, of the working cavity, so that dynamic seal is formed between the piston and the side wall of the main shell, close to the exhaust cavity, of the working cavity.
4. The electromagnetic pilot control valve according to claim 3, wherein a discharge passage is provided between the inner cavity of the bellows and the exhaust chamber in the working chamber, the discharge passage being for communicating the inner cavity of the bellows with the exhaust chamber.
5. The electromagnetic pilot control valve of claim 3, wherein the main valve spool is of a cylindrical structure with bell-mouthed ends, and the two ends of the main valve spool are used for switching on and off the inlet chamber and the outlet chamber and the exhaust chamber.
6. The electromagnetic pilot control valve according to claim 1, wherein the elastic opening and closing member includes an auxiliary spring and a steel ball, a first assembly hole is formed at one end of the electromagnetic housing connected with the left valve cover, and one end of the left valve cover connected with the electromagnetic housing is installed in the first assembly hole;
the left valve cover is provided with a first inner hole at one end connected with the electromagnetic assembly, the auxiliary spring is arranged in the first inner hole, one end of the auxiliary spring is connected with the bottom of the first inner hole in the length direction, and the other end of the auxiliary spring is in contact with the steel ball.
7. The electromagnetic pilot control valve according to claim 6, wherein a second assembly hole is formed in one end, connected with the right valve cover, of the electromagnetic shell, and the second assembly hole is matched with the contour of the pilot valve core; a second inner hole is formed in the outer side of the second assembly hole along the circumferential direction of the second assembly hole; the pilot valve core is arranged in the second assembly hole, and the pilot spring is arranged in the second inner hole.
8. The electromagnetic pilot control valve according to claim 6, characterized in that a first passage, a second passage, and a third passage are provided inside the pilot spool, one end of the first passage being in communication with the second passage, the other end thereof being in communication with the third passage, the third passage being in communication with a medium outflow passage.
9. The electromagnetic pilot control valve according to claim 8, wherein the left valve cover adopts a T-shaped structure, a fifth passage is provided in a lateral portion of the T-shaped structure, a sixth passage is provided in a circumferential direction of the fifth passage from a side wall of the fifth passage, the fifth passage communicates with a sixth passage and a medium inflow passage, and the sixth passage communicates with a fourth passage formed at an end where the first fitting hole and the left valve cover are connected; the fourth channel is used for communicating with the second channel under the control of the steel ball.
10. The electromagnetic pilot control valve according to claim 8, characterized in that a first boss is provided at an end of the pilot spool of the second passage, the first boss being for pushing the steel ball; the end part of the pilot valve core of the third channel is provided with a second boss, and the second boss is used for extending into the exhaust hole to be connected with the exhaust valve core.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211208046.3A CN115559830B (en) | 2022-09-30 | 2022-09-30 | Electromagnetic pilot control valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211208046.3A CN115559830B (en) | 2022-09-30 | 2022-09-30 | Electromagnetic pilot control valve |
Publications (2)
| Publication Number | Publication Date |
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| CN115559830A CN115559830A (en) | 2023-01-03 |
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