CN115899363A - Electromagnetic valve - Google Patents

Abstract

The application discloses a solenoid valve. A main valve core cavity is arranged in the middle of a main valve seat of the electromagnetic valve, an electromagnetic valve inlet communicated with the main valve core cavity is formed in the middle of the main valve seat, an electromagnetic valve outlet communicated with the main valve core cavity is formed in the first end of the main valve seat, an elastic part cavity communicated with the main valve core cavity is formed in the second end of the main valve seat, a first medium channel is further formed in the main valve seat and communicated between the main valve core cavity and the elastic part cavity, the main valve core can be arranged in the middle of the main valve seat along the axial movement of the main valve seat, the end face of the first end of the main valve core corresponds to the electromagnetic valve inlet, a sealing part is arranged between the first end of the main valve core and the electromagnetic valve outlet, the elastic part is arranged in the elastic part cavity, and the elastic part is connected with the second end of the main valve core. The utility model provides a sealing force that the sealing member received can be changed through the rigidity of adjusting the elastic component to the solenoid valve to avoided the sealing member to damage because of the effort that receives is too big.

Description

Electromagnetic valve

Technical Field

The application belongs to the technical field of liquid rocket engines, and particularly relates to an electromagnetic valve.

Background

High-pressure gas is often stored in a gas cylinder of a liquid rocket engine and used for engine blowing and valve control, and the gas supply of the high-pressure gas cylinder is often controlled by a valve, so that the valve is required to have strong pressure-bearing capacity and reliable performance, and can be opened and closed at any time.

In the related art, the electromagnetic valve directly controls the valve core to move to realize the opening and closing of the valve, the electromagnetic valve is in a high-pressure working state, in order to overcome medium force, the electromagnetic force of the electromagnetic valve is generally designed to be larger, so that the sealing force of a plastic sealing part used for sealing a valve port on the valve core is too large, the plastic sealing part of the valve core is damaged after the electromagnetic valve works for many times due to too high sealing specific pressure, and high-pressure gas directly impacts the sealing part of the valve core, the valve core is also easily damaged, so that the sealing performance and the service life of the valve are influenced, and the working reliability of the valve is reduced.

Disclosure of Invention

The present application aims to solve, at least to some extent, the technical problem that the sealing member on the valve element in the related art is easily damaged. To this end, the present application provides a solenoid valve.

The technical scheme of the application is as follows:

the application provides a solenoid valve, includes:

the main valve seat is provided with a first end and a second end which are opposite, a main valve core cavity is arranged in the middle of the main valve seat, the middle of the main valve seat is provided with a solenoid valve inlet communicated with the main valve core cavity, the first end of the main valve seat is provided with a solenoid valve outlet communicated with the main valve core cavity, the second end of the main valve seat is provided with an elastic part cavity communicated with the main valve core cavity, a first medium channel is also arranged in the main valve seat, and the first medium channel is communicated between the main valve core cavity and the elastic part cavity;

the main valve core is provided with a first end and a second end which are opposite, and can be arranged in the middle of the main valve seat in an axial movement mode along the main valve seat, the end face of the first end of the main valve core is arranged corresponding to the inlet of the electromagnetic valve, a gap is formed between the peripheral surface of the first end of the main valve core and the wall surface of the cavity of the main valve core, and the peripheral surface of the second end of the main valve core is connected with the wall surface of the cavity of the main valve core in a sealing mode;

a seal disposed between the first end of the main spool and the solenoid valve outlet, the seal disposed on the first end of the main spool and within an end face of the first end of the main spool;

an elastic member disposed within the elastic member chamber, the elastic member coupled to the second end of the main poppet,

the auxiliary valve seat is provided with a first end and a second end which are opposite, and the first end of the auxiliary valve seat is connected with the middle part of the main valve seat;

the auxiliary valve core is provided with a first end and a second end which are opposite, the auxiliary valve core can be arranged in the auxiliary valve seat in a way of moving along the axial direction of the auxiliary valve seat, and the first end of the auxiliary valve core is hermetically arranged in the first medium channel in a penetrating way and can block the first medium channel;

a drive seat having opposite first and second ends, the first end of the drive seat being connected opposite the second end of the secondary valve seat;

the armature is connected with the second end of the auxiliary valve core and is arranged in the middle of the driving seat in a way of moving along the axial direction of the driving seat;

the first electromagnet is arranged in the first end of the driving seat;

and the second electromagnet is arranged in the second end of the driving seat.

In some embodiments, the solenoid valve further comprises a spring seat disposed within the spring cavity, the spring seat disposed between the spring and the second end of the main spool.

In some embodiments, the solenoid valve further comprises a stem lifter connected between the spring seat and the second end of the main spool.

In some embodiments, the solenoid valve further includes an end cover having a first end and a second end opposite to each other, the end cover is disposed between the middle of the main valve seat and the second end of the main valve seat, the first end of the end cover is disposed in the main valve spool cavity, the second end of the main valve spool is disposed in the first end of the end cover in a sealing manner, the second end of the end cover is opened with a second medium passage, an inlet of the second medium passage is connected to an outlet of the first medium passage, an outlet of the second medium passage is opened on a surface of the second end of the end cover opposite to an end surface of the second end of the main valve spool, and the push rod is disposed on the second end of the end cover in a sealing manner.

In some embodiments, the second end of the main valve seat is a cartridge, the spring chamber opens into the cartridge, and the cartridge is coupled to the second end of the end cap.

In some embodiments, the interior of the secondary valve seat communicates with the first media passage, the first end of the secondary spool may seal the inlet of the first media passage, and the second end of the secondary spool may seal the second end of the secondary valve seat.

In some embodiments, the solenoid valve further comprises a connecting rod, and the armature and the secondary valve spool are connected through the connecting rod.

In some embodiments, the solenoid valve further comprises a carrier having first and second opposite ends, the first end of the carrier being disposed within the secondary valve seat, the secondary valve spool being disposed within the first end of the carrier, and the connecting rod being disposed through the second end of the carrier.

In some embodiments, the solenoid valve further comprises a coupling member through which the secondary valve seat is coupled to the drive seat.

In some embodiments, the electromagnetic valve further includes a magnetic steel, the magnetic steel is disposed in the driving seat and disposed between the first electromagnet and the second electromagnet, and the armature is disposed in the first electromagnet, the magnetic steel, and the second electromagnet in a penetrating manner.

The embodiment of the application has at least the following beneficial effects:

when the electromagnetic valve is in an initial state, a medium is not introduced into the electromagnetic valve at the moment, the main valve core abuts against the first end of the main valve seat under the elastic action of the elastic piece, and the sealing piece arranged on the first end of the main valve core seals the outlet of the electromagnetic valve.

When the first electromagnet is electrified and the second electromagnet is not electrified, the armature moves towards the first end of the driving seat under the action of the electromagnetic force of the first electromagnet, and the armature drives the auxiliary valve core to move along the direction from the second end to the first end of the auxiliary valve seat until the first end of the auxiliary valve core blocks the first medium channel. The medium enters the cavity of the main valve core from the inlet of the solenoid valve, and the sealing element is positioned in the end face of the first end of the main valve core because the first medium channel is in a broken circuit state, so that the medium can apply medium force to a part, not provided with the sealing element, on the end face of the first end of the main valve core, the direction of the medium force is the direction from the first end to the second end of the main valve core, along with the rise of the medium pressure, the medium force acting on the end face of the first end of the main valve core can be increased more and more until the medium force is larger than the elastic force of the elastic element, so that the main valve core moves along the direction from the first end to the second end of the main valve core, and the sealing element is separated from the outlet of the solenoid valve, and the valve of the solenoid valve is opened.

When the first electromagnet is not electrified and the second electromagnet is electrified, the armature moves towards the second end of the driving seat under the action of the electromagnetic force of the second electromagnet, and the armature drives the auxiliary valve core to move along the direction from the first end to the second end of the auxiliary valve seat until the first end of the auxiliary valve core does not block the first medium channel. The medium in the main valve core cavity enters the first medium channel and enters the elastic element cavity from the first medium channel, and the medium in the elastic element cavity exerts medium force on the end face of the second end of the main valve core, and the direction of the medium force is the direction from the second end to the first end of the main valve core. At this time, the resultant force of the medium force exerted by the medium on the end face of the second end of the main valve core and the elastic force of the elastic element is larger than the medium force exerted by the medium on the end face of the first end of the main valve core, so that the main valve core is in the direction from the second end to the first end, and the sealing element seals the outlet of the solenoid valve, thereby closing the valve of the solenoid valve.

In summary, in the electromagnetic valve provided in the present application, when the electromagnetic valve is in an open state, the acting force acting on the sealing element is a medium force applied by a medium on the end face of the first end of the main valve element, and the electromagnetic valve is kept stably open by overcoming the spring force of the elastic element, and when the electromagnetic valve is in a closed state, the acting force acting on the sealing element is a resultant force of the medium force applied by the medium on the end face of the second end of the main valve element and the elastic force of the elastic element minus the medium force applied by the medium on the end face of the first end of the main valve element, so that the sealing force applied to the sealing element can be changed by adjusting the rigidity of the elastic element, and the sealing element is prevented from being damaged due to an excessively large acting force, and the medium directly impacts the circumferential surface of the main valve element after entering the electromagnetic valve element, and is not directly impacts the sealing element of the valve element, and the sealing element is also prevented from being damaged due to the medium impact.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the description below are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.

FIG. 1 is a schematic structural diagram illustrating a valve closing state of a solenoid valve according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram illustrating an open state of a valve of a solenoid valve according to an embodiment of the present disclosure;

FIG. 3 is a schematic diagram of a permanent magnet circuit;

FIG. 4 is a schematic diagram of the opening of the magnetic circuit;

fig. 5 is a schematic view of the closed magnetic circuit.

Reference numerals:

10-main valve seat; 11-a cartridge; 12-a primary spool cavity; 13-solenoid valve inlet; 14-outlet of electromagnetic valve; 15-a spring cavity; 16-a first media channel; 20-main spool; 30-a seal; 40-an elastic member; 50-a counter-valve seat; 60-auxiliary valve core; 70-a drive seat; 80-an armature; 90-a first electromagnet; 100-a second electromagnet; 110-a spring seat; 120-a top rod; 130-an end cap; 131-a second media channel; 140-a connecting rod; 150-a carrier; 160-a connector; 170-magnetic steel; 180-stop iron; 190-block cover.

Detailed Description

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

Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, examples of various specific processes and materials are provided herein, but one of ordinary skill in the art may recognize applications of other processes and/or use of other materials.

The application is described below with reference to specific embodiments in conjunction with the following drawings:

fig. 1 and 2 are schematic structural views of a solenoid valve according to an embodiment of the present invention, and referring to fig. 1 and 2, the solenoid valve includes a main valve seat 10, a main valve element 20, a sealing member 30, an elastic member 40, a sub valve seat 50, a sub valve element 60, an armature 80, a driving seat 70, a first electromagnet 90, and a second electromagnet 100.

In the embodiment of the present application, main valve seat 10 has a first end and a second end opposite to each other, a main valve core chamber 12 is disposed in the middle of main valve seat 10, a solenoid valve inlet 13 communicating with main valve core chamber 12 is disposed in the middle of main valve seat 10, a solenoid valve outlet 14 communicating with main valve core chamber 12 is disposed at the first end of main valve seat 10, an elastic member chamber 15 communicating with main valve core chamber 12 is disposed at the second end of main valve seat 10, a first medium passage 16 is further disposed in main valve seat 10, first medium passage 16 communicates between main valve core chamber 12 and elastic member chamber 15, main valve core 20 has a first end and a second end opposite to each other, and is disposed in the middle of main valve seat 10 in an axially movable manner along the axial direction of main valve seat 10, an end face of the first end of main valve core 20 is disposed corresponding to solenoid valve inlet 13, and a gap is provided between a peripheral surface of the first end of main valve core 20 and a wall surface of main valve core chamber 12, a sealing connection is provided between the peripheral surface of the second end of main spool 20 and the wall surface of main spool chamber 12, a sealing member 30 is provided between the first end of main spool 20 and solenoid valve outlet 14, sealing member 30 is provided on the first end of main spool 20 and in the end surface of the first end of main spool 20, an elastic member 40 is provided in elastic member chamber 15, elastic member 40 is connected to the second end of main spool 20, a sub-valve seat 50 has opposite first and second ends, the first end of sub-valve seat 50 is connected to the middle of main valve seat 10, sub-spool 60 has opposite first and second ends, sub-spool 60 is provided in sub-valve seat 50 movably in the axial direction of sub-valve seat 50, the first end of sub-spool 60 is sealingly inserted in first medium passage 16 and blocks first medium passage 16, armature 80 is connected to the second end of sub-spool 60, armature 80 is provided in the middle of drive seat 70 movably in the axial direction of drive seat 70, the driving seat 70 has opposite first and second ends, the first end of the driving seat 70 is connected opposite to the second end of the sub-valve seat 50, the first electromagnet 90 is disposed in the first end of the driving seat 70, and the second electromagnet 100 is disposed in the second end of the driving seat 70.

Specifically, when the solenoid valve is in an initial state, in which no medium is introduced into the solenoid valve, main poppet 20 abuts against the first end of main poppet 10 under the elastic force of elastic member 40, and sealing member 30 disposed on the first end of main poppet 20 seals solenoid valve outlet 14.

As shown in fig. 1, when the first electromagnet 90 is energized and the second electromagnet 100 is not energized, the armature 80 moves toward the first end of the driving seat 70 under the electromagnetic force of the first electromagnet 90, and the armature 80 drives the auxiliary valve element 60 to move in the direction from the second end to the first end of the auxiliary valve seat 50 until the first end of the auxiliary valve element 60 blocks the first medium passage 16. Media enters main spool chamber 12 from solenoid valve inlet 13, and because first media passage 16 is in the open circuit state, seal 30 is located in the end face of the first end of main spool 20, so that media can apply a media force to a portion of the end face of the first end of main spool 20 where seal 30 is not located, the media force is in a direction from the first end to the second end of main spool 20, and as the media pressure increases, the media force acting on the end face of the first end of main spool 20 becomes larger and larger until the media force is larger than the elastic force of elastic member 40, main spool 20 moves in the direction from the first end to the second end thereof, so that seal 30 is separated from solenoid valve outlet 14, thereby realizing the opening of the solenoid valve.

As shown in fig. 2, when the first electromagnet 90 is not energized and the second electromagnet 100 is energized, the armature 80 moves toward the second end of the driving seat 70 under the electromagnetic force of the second electromagnet 100, and the armature 80 drives the auxiliary valve element 60 to move in the direction from the first end to the second end of the auxiliary valve seat 50 until the first end of the auxiliary valve element 60 no longer blocks the first medium passage 16. The medium in the main valve core chamber 12 will enter the first medium channel 16, and enter the elastic element chamber 15 through the first medium channel 16, and the medium in the elastic element chamber 15 will apply a medium force to the end face of the second end of the main valve core 20, where the direction of the medium force is the direction from the second end to the first end of the main valve core 20. At this time, the resultant of the medium force of the medium applied to the end surface of the second end of main poppet 20 and the elastic force of elastic member 40 is greater than the medium force of the medium applied to the end surface of the first end of main poppet 20, causing main poppet 20 to move in the direction from the second end to the first end thereof, thereby causing sealing member 30 to seal solenoid valve outlet 14, thereby effecting closing of the solenoid valve.

That is, when the solenoid valve is in an open state, the acting force acting on the sealing element 30 is the medium force applied by the medium on the end face of the first end of the main valve element 20, and the solenoid valve is kept stably open by overcoming the spring force of the elastic element 40, and when the solenoid valve is in a closed state, the acting force acting on the sealing element 30 is the medium force applied by the medium on the end face of the second end of the main valve element 20 and the medium force applied by the medium on the end face of the first end of the main valve element 20 subtracted from the resultant force of the medium force applied by the medium on the end face of the second end of the main valve element 20, so that the sealing force applied on the sealing element 30 can be changed by adjusting the rigidity of the elastic element 40, and the sealing element 30 is prevented from being damaged due to the excessive acting force, and the medium directly impacts the peripheral surface of the main valve element 20 after entering the solenoid valve, and is prevented from directly impacting the sealing element 30.

Although first medium passage 16 communicates between main spool chamber 12 and spring chamber 15, after main spool 20 is disposed in main spool chamber 12, since there is a gap between the peripheral surface of the first end of main spool 20 and the wall surface of main spool chamber 12, the peripheral surface of the second end of main spool 20 and the wall surface of main spool chamber 12 are sealingly connected, and thus the medium introduced into spring chamber 15 can only act on the end surface of the second end of main spool 20 and cannot flow back to main spool chamber 12.

In some embodiments, as shown in fig. 1, the solenoid valve further includes an elastic member seat 110, the elastic member seat 110 is disposed in the elastic member cavity 15, the elastic member seat 110 is disposed between the elastic member 40 and the second end of the main spool 20, an end of the elastic member 40 facing toward the main spool 20 is fixed by the elastic member seat 110, and an end of the elastic member 40 facing away from the main spool 20 is fixed by a bottom of the elastic member cavity 15, so that smooth extension and retraction of the elastic member 40 in the elastic member cavity 15 is realized to apply a force to the main spool 20 better.

In some embodiments, as shown in FIG. 1, the solenoid valve further includes a stem 120, the stem 120 being coupled between the spring seat 110 and the second end of the main poppet 20 to enable coupling between the spring seat 110 and the main poppet 20 via the stem 120.

In some embodiments, as shown in fig. 1, the solenoid valve further includes an end cap 130, the end cap 130 has a first end and a second end opposite to each other, the end cap 130 is disposed between a middle portion of the main valve seat 10 and the second end of the main valve seat 10, the first end of the end cap 130 is disposed in the main valve core chamber 12, the second end of the main valve core 20 is disposed in the first end of the end cap 130 in a sealing manner, the second end of the end cap 130 is opened with a second medium passage 131, an inlet of the second medium passage 131 is connected to an outlet of the first medium passage 16, an outlet of the second medium passage 131 is opened on a face of the second end of the end cap 130 opposite to an end face of the second end of the main valve core 20, and the ejector rod 120 is disposed on the second end of the end cap 130 in a sealing manner. In order to enable the medium to exert a better medium force on the end face of the second end of the valve element, main valve element chamber 12 and spring element chamber 15 are separated by end cap 130, the medium enters second medium channel 131 from first medium channel 16, and after exiting from the outlet of second medium channel 131, the medium acts directly on the end face of the second end of main valve element 20. It should be noted that, no matter the main spool chamber 12 and the elastic member chamber 15 are separately arranged or arranged in a communicating manner, the effect of the electromagnetic valve provided in the embodiment of the present application is not affected.

In some embodiments, as shown in fig. 1, the second end of the main valve seat 10 is a barrel 11, the resilient member cavity 15 opens in the barrel 11, and the barrel 11 is connected to the second end of the end cap 130. To facilitate the positioning of main poppet 20, stem 120, spring 40, and spring seat 110, main poppet 20 is positioned within main poppet chamber 12, stem 120 is coupled to main poppet 20, cap 130 is then installed, a first end of cap 130 is positioned within main poppet chamber 12, main poppet 20 is positioned within a first end of cap 130, stem 120 is threaded onto a second end of cap 130, spring 40 and spring seat 110 are then installed into spring chamber 15 of barrel 11, spring seat 110 is coupled to stem 120, and barrel 11 is finally coupled to cap 130.

In some embodiments, as shown in fig. 1, the interior of the counter valve seat 50 communicates with the first media passage 16, a first end of the counter spool 60 may seal an inlet of the first media passage 16, and a second end of the counter spool 60 may seal a second end of the counter valve seat 50. The main body of the first medium passage 16 is arranged in the axial direction of the main valve seat 10, the inlet passage of the first medium passage 16 communicates between the main spool chamber 12 and the main body of the first medium passage 16, the inside of the sub valve seat 50 communicates with the main body of the first medium passage 16, the first end of the sub spool 60 is arranged opposite to the inlet passage of the first medium passage 16, and when the first electromagnet 90 is energized and the second electromagnet 100 is not energized, the sub spool 60 moves in the direction from the second end to the first end thereof, so that the first end of the sub spool 60 seals the inlet passage of the first medium passage 16. The second end of the secondary valve seat 50 is provided with an opening for connecting the second end of the secondary valve element 60 to the armature 80, and when the first electromagnet 90 is not energized and the second electromagnet 100 is energized, the secondary valve element 60 moves in the direction from the first end to the second end thereof, so that the second end of the secondary valve element 60 seals the opening at the second end of the secondary valve seat 50.

Further, the auxiliary valve body 60 and the auxiliary valve seat 50 are connected in a non-sealing manner, and the first medium passage 16, the second medium passage 131, and the medium in the main valve chamber 12 corresponding to the second end of the main valve body 20 can be discharged from the second end of the auxiliary valve seat 50 through a gap between the auxiliary valve body 60 and the auxiliary valve seat 50, via the first end of the auxiliary valve seat 50. That is, when the solenoid valve changes from the closed state to the open state, the secondary spool 60 moves in the direction from the second end to the first end thereof, so that the second end of the secondary valve seat 50 is opened, and simultaneously, as the main spool 20 moves in the direction from the first end to the second end thereof, the main spool 20 presses the medium located at the second end thereof, so that the medium in the first medium passage 16, the second medium passage 131, and the main spool chamber 12 corresponding to the second end of the main spool 20 enters the secondary valve seat 50, and is discharged out of the secondary valve seat 50 through the first end and the second end of the secondary valve seat 50, thereby ensuring the movement of the main spool 20 in the direction from the first end to the second end thereof.

In some embodiments, as shown in fig. 1, the solenoid valve further includes a connecting rod 140, the connecting rod 140 being connected between the armature 80 and the secondary spool 60 to enable connection between the armature 80 and the secondary spool 60 through the connecting rod 140. The connecting rod 140 is inserted through the second end of the sub-valve seat 50, so that the size of the opening at the second end of the sub-valve seat 50 can be reduced, and the second end of the sub-valve body 60 can be better sealed against the opening at the second end of the sub-valve seat 50.

In some embodiments, as shown in fig. 1, the solenoid valve further comprises a carrier 150, the carrier 150 having opposite first and second ends, the first end of the carrier 150 being disposed within the sub-valve seat 50, the sub-valve spool 60 being disposed within the first end of the carrier 150, and the connecting rod 140 being disposed through the second end of the carrier 150. To facilitate the positioning of the secondary spool 60 within the secondary valve seat 50, a carrier 150 is used, the secondary spool 60 is first positioned within the secondary valve seat 50, then the first end of the carrier 150 is positioned within the secondary valve seat 50, and simultaneously the secondary spool 60 is positioned within the first end of the carrier 150, and the connecting rod 140 is threaded onto the second end of the carrier 150.

In some embodiments, as shown in fig. 1, the solenoid valve further comprises a connecting member 160, the connecting member 160 being connected between the counter valve seat 50 and the driving seat 70 to enable connection between the counter valve seat 50 and the driving seat 70 through the connecting member 160. In the embodiment of the present invention, the coupling member 160 is a nut, and external threads are formed on the outer circumferential surfaces of the sub-valve seat 50 and the driving seat 70, so that the sub-valve seat 50 and the driving seat 70 are coupled to each other by the threaded coupling between the sub-valve seat 50 and the driving seat 70 and the coupling member 160.

In some embodiments, the elastic member 40 may be a spring, a rubber, or other elastic structure, which is not limited by the embodiments of the present application. As shown in fig. 1, the elastic member 40 in the embodiment of the present application is a spring.

In some embodiments, as shown in fig. 1, the solenoid valve further includes a magnetic steel 170, the magnetic steel 170 is disposed in the driving seat 70 and between the first electromagnet 90 and the second electromagnet 100, and the armature 80 is disposed through the first electromagnet 90, the magnetic steel 170, and the second electromagnet 100. Therefore, after the first electromagnet 90 is electrified and the second electromagnet 100 is not electrified, and the armature 80 moves to the first end of the driving seat 70, and after the first electromagnet 90 is not electrified and the second electromagnet 100 is electrified and the armature 80 moves to the second end of the driving seat 70, the first electromagnet 90 is electrified and the second electromagnet 100 is in a non-electrified state, and the magnetic steel 170 can keep the armature 80 in a preset state. That is, after the first electromagnet 90 or the second electromagnet 100 is energized, as long as the armature 80 moves to a required position, the first electromagnet 90 or the second electromagnet 100 can be de-energized, so that the state of the electromagnetic valve is locked, and the phenomenon that the electromagnet generates heat after being energized for a long time, which shortens the service life of the electromagnetic valve, is avoided.

In some embodiments, as shown in fig. 1, the solenoid valve further includes a stop iron 180, the stop iron 180 is disposed in the driving seat 70 and connected to an end of the second electromagnet 100 opposite to the first electromagnet 90, and the driving seat 70, the armature 80 and the stop iron 180 are made of soft magnetic alloy material, so as to form a magnetic conductive loop, where the electromagnetic loop includes a permanent magnetic loop, an opening magnetic loop and a closing magnetic loop. Fig. 3 is a schematic diagram of a permanent magnet circuit, which is a magnetic circuit when both the first electromagnet 90 and the second electromagnet 100 are not energized. Fig. 4 is a schematic diagram of the open magnetic circuit, with first electromagnet 90 energized and second electromagnet 100 de-energized. Figure 5 is a schematic diagram of the closed magnetic circuit with the first electromagnet 90 de-energized and the second electromagnet 100 energized.

In some embodiments, as shown in fig. 1, the solenoid valve further includes a cap 190, and the second end of the driving seat 70 is opened, so that the first electromagnet 90, the magnetic steel 170, the second electromagnet 100, the stop iron 180, and the armature 80 are sequentially disposed in the driving seat 70, and then the cap 190 is disposed on the second end of the driving seat 70.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. "beneath," "under" and "beneath" a first feature includes the first feature being directly beneath and obliquely beneath the second feature, or simply indicating that the first feature is at a lesser elevation than the second feature.

In the description of the present application, it is to be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise" indicate orientations or positional relationships based on the orientation or positional relationships illustrated in the drawings, and are used merely for convenience in describing the present application and for simplicity in description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present application.

It should be noted that all the directional indications in the embodiments of the present application are only used for explaining the relative position relationship, the motion condition, and the like between the components in a certain posture, and if the certain posture is changed, the directional indication is changed correspondingly.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as the case may be.

In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.

In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

In addition, technical solutions between the embodiments may be combined with each other, but must be based on the realization of the technical solutions by a person skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope claimed in the present application.

While embodiments of the present application have been shown and described, it will be understood by those of ordinary skill in the art that: numerous changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the application, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A solenoid valve, comprising:

the main valve seat is provided with a first end and a second end which are opposite, a main valve core cavity is arranged in the middle of the main valve seat, the middle of the main valve seat is provided with a solenoid valve inlet communicated with the main valve core cavity, the first end of the main valve seat is provided with a solenoid valve outlet communicated with the main valve core cavity, the second end of the main valve seat is provided with an elastic part cavity communicated with the main valve core cavity, a first medium channel is also arranged in the main valve seat, and the first medium channel is communicated between the main valve core cavity and the elastic part cavity;

the main valve core is provided with a first end and a second end which are opposite, and can be arranged in the middle of the main valve seat in an axial movement mode along the main valve seat, the end face of the first end of the main valve core is arranged corresponding to the inlet of the electromagnetic valve, a gap is formed between the peripheral surface of the first end of the main valve core and the wall surface of the cavity of the main valve core, and the peripheral surface of the second end of the main valve core is connected with the wall surface of the cavity of the main valve core in a sealing mode;

a seal disposed between the first end of the main spool and the solenoid valve outlet, the seal disposed on the first end of the main spool and within an end face of the first end of the main spool;

an elastic member disposed within the elastic member chamber, the elastic member coupled to the second end of the main poppet,

the auxiliary valve seat is provided with a first end and a second end which are opposite, and the first end of the auxiliary valve seat is connected with the middle part of the main valve seat;

the auxiliary valve element is provided with a first end and a second end which are opposite, the auxiliary valve element can be arranged in the auxiliary valve seat in a way of moving along the axial direction of the auxiliary valve seat, and the first end of the auxiliary valve element is hermetically arranged in the first medium channel in a penetrating way and can block the first medium channel;

a drive seat having opposite first and second ends, the first end of the drive seat being connected opposite the second end of the secondary valve seat;

the armature is connected with the second end of the auxiliary valve core and is arranged in the middle of the driving seat in a way of moving along the axial direction of the driving seat;

the first electromagnet is arranged in the first end of the driving seat;

and the second electromagnet is arranged in the second end of the driving seat.

2. The solenoid valve of claim 1 further comprising a spring seat disposed within the spring cavity, the spring seat disposed between the spring and the second end of the main poppet.

3. The solenoid valve of claim 2, further comprising a poppet connected between the spring seat and the second end of the main spool.

4. The solenoid valve according to claim 3, further comprising an end cap having a first end and a second end opposite to each other, the end cap being disposed between a middle portion of the main valve seat and the second end of the main valve seat, the first end of the end cap being disposed in the cavity of the main valve spool, the second end of the main valve spool being disposed in the first end of the end cap in a sealing manner, the second end of the end cap being opened with a second medium passage, an inlet of the second medium passage being connected to an outlet of the first medium passage, an outlet of the second medium passage being opened on a face of the second end of the end cap opposite to an end face of the second end of the main valve spool, and the plunger being disposed in the sealing manner at the second end of the end cap.

5. The solenoid valve of claim 4 wherein said second end of said main valve seat is a barrel, said spring chamber opening in said barrel, said barrel being connected to said second end of said end cap.

6. The solenoid valve of claim 1 wherein the interior of the secondary valve seat communicates with the first media passage, the first end of the secondary spool seals the inlet of the first media passage, and the second end of the secondary spool seals the second end of the secondary valve seat.

7. The solenoid valve of claim 6 further comprising a connecting rod, wherein the armature and the secondary spool are connected by the connecting rod.

8. The solenoid valve of claim 7 further comprising a carrier having opposing first and second ends, the first end of the carrier disposed within the secondary valve seat, the secondary spool disposed within the first end of the carrier, the connecting rod disposed through the second end of the carrier.

9. The solenoid valve of claim 1 further comprising a coupling member through which said secondary valve seat is coupled to said drive seat.

10. The electromagnetic valve according to any one of claims 1 to 9, further comprising a magnetic steel, wherein the magnetic steel is disposed in the driving seat and between the first electromagnet and the second electromagnet, and the armature is disposed through the first electromagnet, the magnetic steel, and the second electromagnet.

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