CN220581801U - Solenoid valve, cylinder valve and gas cylinder - Google Patents

Abstract

The utility model provides an electromagnetic valve, a cylinder valve and a gas cylinder, and relates to the technical field of gas cylinders; the fixed part is magnetically connected with the movable part in an electrified state, the fixed part is positioned at one end of the fastener, and the movable part penetrates through the fastener along the axial direction of the fastener and is in sliding fit with the fastener; the shell is provided with a hemming structure, and the shell is clamped outside the fastening piece and the fixing part through the hemming structure so as to limit the axial position of the fixing part relative to the fastening piece. The shell in the electromagnetic valve provided by the utility model is not required to be fixed by adopting a bolt structure, and can be clamped outside the fastener and the fixing part through the hemming structure of the shell, so that the structure is more compact, and the structural size of the electromagnetic valve is reduced.

Description

Solenoid valve, cylinder valve and gas cylinder

Technical Field

The utility model relates to the technical field of gas cylinders, in particular to an electromagnetic valve, a cylinder valve and a gas cylinder.

Background

In on-vehicle hydrogen storage system field, the import of hydrogen cylinder installs the bottle valve, and this bottle valve contains filter, hand valve (manual stop valve), solenoid valve, emergent bleeder valve, temperature-driven safety pressure relief device (TPRD), temperature sensor, overflow valve etc. module for control hydrogen supply, hydrogenation of hydrogen cylinder, when surpassing certain temperature, carry out the release of hydrogen. The electromagnetic valve module is used for controlling the hydrogen supply of the hydrogen cylinder, when the electromagnetic valve is electrified, the hydrogen cylinder supplies hydrogen, and when the electromagnetic valve is deenergized, the hydrogen cylinder stops supplying hydrogen.

The existing electromagnetic valves for high-pressure hydrogen are divided into an internal electromagnetic valve and an external electromagnetic valve according to the difference that the electromagnetic valves are placed at the inner and outer positions of the hydrogen cylinder. External solenoid valves now have the following disadvantages: 1. the shell of the electromagnetic valve is fixed by bolts, so that the electromagnetic valve has large structural size; 2. the main sealing structure of the electromagnetic valve adopts a hard sealing structure, and larger electromagnetic force is needed during sealing, so that the electromagnetic valve has high power and is easy to generate heat; 3. the magnetic leakage rate of the electromagnetic valve is high.

Therefore, how to provide a solenoid valve and a gas cylinder capable of solving at least one of the above technical problems is one of the technical problems to be solved by those skilled in the art.

Disclosure of Invention

The utility model aims to provide the electromagnetic valve, the upper shell of the electromagnetic valve can be clamped outside the fastener and the fixing part through the hemming structure of the upper shell, the structure is more compact, and the structural size of the electromagnetic valve is reduced. There is also provided a cylinder valve including the above-described solenoid valve, and a gas cylinder including the above-described solenoid valve or the above-described cylinder valve.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

in a first aspect, the present utility model provides a solenoid valve comprising a fastener, a magnetomotive assembly and a housing, the magnetomotive assembly having a fixed portion and a movable portion slidably engaged with the fixed portion along an axial direction of the fastener;

the fixed part is magnetically connected with the movable part in an electrified state, the fixed part is positioned at one end of the fastener, and the movable part penetrates through the fastener along the axial direction of the fastener and is in sliding fit with the fastener;

the housing has a hemming structure by which the housing is clamped to the fastener and the exterior of the fixing portion to define an axial position of the fixing portion relative to the fastener.

Further, the fixing portion includes a stationary armature and a coil located between the stationary armature and the fastener in an axial direction of the fastener;

one end of the static armature, which is away from the coil, is clamped with the hemming structure so that the coil is clamped between the fastening piece and the static armature, and the other end of the static armature stretches into a space surrounded by the coil;

one end of the movable part penetrates through the fastening piece and is in sliding fit with the fastening piece, the other end of the movable part stretches into a space surrounded by the coil and is opposite to the static armature, and the movable part has a sliding degree of freedom relative to the coil along the axial direction of the coil.

Further, the fixed part further comprises a leakage-proof magnetic sleeve sleeved outside the static armature and the movable part, and the coil is sleeved outside the leakage-proof magnetic sleeve;

and/or the material of the shell is austenitic stainless steel.

Further, one of the leakage preventing magnetic sleeve and the static armature is formed with a clamping groove, and the other is formed with a protrusion clamped into the clamping groove so as to limit the axial position of the leakage preventing magnetic sleeve relative to the static armature.

Further, the movable part comprises a force storage elastic piece, a movable armature, a pilot valve seat, a limiting component and a valve core;

one end of the movable armature extends into the fixed part and is in sliding fit with the fixed part, the other end of the movable armature penetrates through the fastening piece and is in sliding fit with the fastening piece, and the force storage elastic piece is arranged between one end of the movable armature extending into the fixed part and the fixed part;

the pilot valve seat is arranged on the end face of the movable armature, which is away from the fixed part, the limiting assembly is sleeved outside one end of the movable armature, which is away from the fixed part, the valve core is arranged in the limiting assembly in a sliding manner along the axial direction of the limiting assembly and is opposite to the pilot valve seat, and one end of the valve core, which is away from the pilot valve seat, extends out of the limiting assembly.

Further, a first seal assembly is disposed between the moving armature and the fastener.

Further, the limiting assembly comprises a sleeve and a fixing seat, the sleeve is sleeved outside one end of the movable armature, which is away from the fixing portion, the fixing seat is fixedly arranged inside one end of the sleeve, which is away from the movable armature, and the valve core is in sliding fit with the sleeve and extends out of the fixing seat.

Further, the valve further comprises a main valve seat with an air outlet, the main valve seat is used for being matched with the magnetomotive assembly to realize opening and closing of the air outlet, and the main valve seat is made of nonmetal materials.

In a second aspect, the utility model further provides a bottle valve, which comprises a housing and the electromagnetic valve according to the above scheme, wherein one end of the fastener and the magnetomotive assembly, which is away from the housing, is inserted into the housing together and forms a gas supply channel with the housing, a second sealing assembly is arranged between the fastener and the housing, and the magnetomotive assembly is configured to switch the on-off state of the gas supply channel by changing the energizing state of the fixing part.

In a second aspect, the utility model also provides a gas cylinder, which comprises the electromagnetic valve or the cylinder valve.

The electromagnetic valve, the cylinder valve and the gas cylinder provided by the utility model have the following beneficial effects:

in the solenoid valve provided by the first aspect of the utility model, the housing has a hemming structure, and the housing is clamped outside the fastener and the fixing part through the hemming structure to limit the axial position of the fixing part relative to the fastener. Compared with the prior art, the electromagnetic valve has the advantages that the shell in the electromagnetic valve does not need to be fixed by adopting a bolt structure, and can be clamped outside the fastener and the fixing part through the hemming structure of the electromagnetic valve, so that the electromagnetic valve is more compact in structure, and the structural size of the electromagnetic valve is reduced.

Compared with the prior art, the bottle valve provided by the second aspect of the utility model comprises the shell and the electromagnetic valve, and has all the beneficial effects of the electromagnetic valve provided by the first aspect of the utility model, and the second sealing assembly is arranged between the fastener and the shell in the bottle valve provided by the second aspect of the utility model, so that the leakage of gas from the matching position of the fastener and the shell can be effectively prevented.

The gas cylinder provided by the third aspect of the utility model is provided with the electromagnetic valve provided by the first aspect of the utility model or the cylinder valve provided by the second aspect of the utility model, so that the gas cylinder has all the beneficial effects of the electromagnetic valve provided by the first aspect of the utility model or the cylinder valve provided by the second aspect of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a partial cross-sectional view of a bottle valve according to an embodiment of the present utility model;

FIG. 2 is an enlarged schematic view of a portion of FIG. 1;

FIG. 3 is an enlarged partial schematic view of the housing in cooperation with a fastener and a static armature provided in an embodiment of the utility model;

fig. 4 is a partially enlarged schematic view illustrating a portion of the housing where the housing and the fixing portion are engaged.

Icon: 1-a fastener; 11-an air supply port; 2-magnetomotive assembly; 21-a fixing part; 211-static armature; 212-coil; 213-leakage-proof magnetic sleeve; 2131-bumps; 22-a force storage elastic member; 23-moving armature; 24-a pilot valve seat; 25-a limiting assembly; 251-sleeve; 252-fixing seat; 26-valve core; 27-pins; 3-a housing; 31-hemming structure; 4-a first seal assembly; 5-a main valve seat; 51-air outlet; 6-a housing; 7-a second seal assembly.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The following describes specific embodiments of the present utility model in detail with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the utility model, are not intended to limit the utility model.

An embodiment of the first aspect of the present utility model is to provide a solenoid valve, as shown in fig. 1 to 3, comprising a fastener 1, a magnetic assembly 2, and a housing 3, the magnetic assembly 2 having a fixed portion 21 and a movable portion slidably engaged with the fixed portion 21 in an axial direction of the fastener 1;

the fixed part 21 is magnetically connected with the movable part in the electrified state, the fixed part 21 is positioned at one end of the fastener 1, and the movable part penetrates through the fastener 1 along the axial direction of the fastener 1 and is in sliding fit with the fastener 1;

the housing 3 has a hemming structure 31, and the housing 3 is clamped to the fastener 1 and the outside of the fixing portion 21 by the hemming structure 31 to define the axial position of the fixing portion 21 with respect to the fastener 1.

The working principle of the magnetic assembly is similar to that of a traditional electromagnetic valve, the magnetic assembly 2 is in a normally closed state, when the fixed part 21 is electrified, the fixed part 21 and the movable part are mutually adsorbed under the action of magnetic force, and the electromagnetic valve is in an open state to realize gas delivery. In the electromagnetic valve, as shown in fig. 3, the casing 3 has a curled edge structure, the casing 3 is clamped outside the fastener 1 and the fixing portion 21 through the curled edge structure 31, and the end surfaces of the fixing portion 21 and the fastener 1 which are axially arranged along the fixing portion 21 can directly abut against each other, so that the electromagnetic valve is more compact in structure, and meanwhile, a bolt structure is not required to be additionally arranged, so that the structural size of the electromagnetic valve is reduced.

Specifically, as shown in fig. 3, the two ends of the housing 3 in the axial direction of the fastener 1 are respectively provided with a hemming structure 31, thereby effectively realizing axial limitation of the fastener 1 and the fixing portion 21.

The above-described hemming structure 31 can be understood as: the end of the housing 3 is bent a certain length toward the space surrounded by the housing so as to be caught on one end face of the fastener 1 or the fixing portion 21, and the axial position of both is defined by the strength of the hemming structure 31 itself.

In at least one embodiment, in order to make the locking of the hemming structure 31 more firm, as shown in fig. 3, a groove is concavely formed on the inner wall of the hemming structure 31, and the fastener 1 and the fixing portion 21 can be locked in the groove, so that the locking area of the fastener 1 and the fixing portion 21 with the hemming structure 31 is increased.

As shown in fig. 2, the housing 3 preferably has a thin-walled structure, reducing the radial dimension of the solenoid valve.

In some embodiments, as shown in fig. 2 and 3, the fixing portion 21 includes a stationary armature 211 and a coil 212 located between the stationary armature 211 and the fastener 1 in an axial direction of the fastener 1, wherein:

one end of the static armature 211, which is away from the coil 212, is clamped with the hemming structure 31, the coil 212 can be stably clamped between the fastener 1 and the static armature 211 under the limit of the hemming structures 31 at the two ends of the shell 3, and the other end of the static armature 211 extends into a space surrounded by the coil 212;

one end of the movable part penetrates through the fastening piece 1 and is in sliding fit with the fastening piece 1, the other end of the movable part stretches into a space surrounded by the coil 212 and is opposite to the static armature 211, and the movable part has a sliding freedom degree relative to the coil 212 along the axial direction of the coil 212.

When the gas cylinder is used, the coil 212 generates electromagnetic force in an electrified state, the movable part moves relative to the coil 212 until the movable part abuts against the end face of the static armature 211, and the end part of the movable part, which is away from the static armature 211, releases the gas outlet 51, so that the gas cylinder gas supply function is realized.

Specifically, the wire harness of the coil 212 may be led out from the harness outlet.

In some embodiments, as shown in fig. 2 and 4, the fixed portion 21 further includes a leakage preventing magnetic sleeve 213 sleeved outside the fixed armature 211 and the movable portion, and the coil 212 is sleeved outside the leakage preventing magnetic sleeve 213.

The arrangement of the leakage-proof magnetic sleeve 213 can prevent the magnetic leakage of the fixed armature 211 and the movable armature 23 in the movable part, reduce the power consumption loss and effectively alleviate the problem of unstable electromagnetic force.

Specifically, the leakage preventing magnetic sleeve 213 may be a thin-walled metal member.

In some embodiments, to facilitate axial securement of the leakage flux sleeve 213, one of the leakage flux sleeve 213 and the static armature 211 is formed with a detent and the other is formed with a protrusion 2131 that snaps into the detent to define the axial position of the leakage flux sleeve 213 relative to the static armature 211.

Taking fig. 4 as an example for specific illustration, a clamping groove is concavely formed on the outer peripheral surface of the static armature 211, and a protrusion 2131 is convexly formed on the inner wall of the leakage-proof magnetic sleeve 213 facing the static armature 211, so that a connecting piece is not required to be additionally arranged between the static armature 211 and the leakage-proof magnetic sleeve 213, connection of the static armature 211 and the leakage-proof magnetic sleeve 213 is facilitated, and the structure of the electromagnet is more compact.

Specifically, the protrusion 2131 of the leakage preventing magnetic sleeve 213 can be formed by applying a force in the circumferential direction of the groove.

In some embodiments, the material of the housing 3 may be austenitic stainless steel, which also serves to reduce the magnetic leakage rate.

In some embodiments, as shown in fig. 2, the movable portion includes a power storage spring 22, a moving armature 23, a pilot valve seat 24, a stop assembly 25, and a spool 26, wherein:

one end of the movable armature 23 stretches into the fixed part 21 and is in sliding fit with the fixed part 21, the other end of the movable armature 23 penetrates through the fastening piece 1 and is in sliding fit with the fastening piece 1, a power storage elastic piece 22 is arranged between one end of the movable armature 23 stretching into the fixed part 21 and the fixed part 21, and the power storage elastic piece 22 can enable the valve core 26 to seal the air outlet 51 under the action of self elastic force;

the guide valve seat 24 is arranged on the end face of the movable armature 23, which is away from the fixed part 21, the limiting component 25 is sleeved outside one end of the movable armature 23, which is away from the fixed part 21, the valve core 26 is arranged in the limiting component 25 in a sliding manner along the axial direction of the limiting component 25 and is opposite to the guide valve seat 24, and one end of the valve core 26, which is away from the guide valve seat 24, extends out of the limiting component 25 so as to block the air outlet 51 when the fixed part 21 is in a non-energized state.

Specifically, when the fixed portion 21 includes the static armature 211, the coil 212, and the leakage preventing magnetic sleeve 213, one end of the movable armature 23 extends into the leakage preventing magnetic sleeve 213 and slidingly engages with the leakage preventing magnetic sleeve 213, and the force accumulating elastic member 22 is provided between the movable armature 23 and the static armature 211.

In use, as shown in fig. 2, when the solenoid valve is not energized, the internal pressure of the valve core 26 and the elastic force of the force accumulating elastic member 22 can cause the valve core 26 to block the air outlet 51, at this time, the solenoid valve is in a closed state, and the air in the air bottle cannot flow out from the air supply port 11 of the solenoid valve. When the electromagnetic valve is electrified, the static armature 211 generates electromagnetic force, the electromagnetic force overcomes the elastic force of the power accumulating elastic piece 22, the movable armature 23 moves along the axial rightward direction, at the moment, the pilot valve seat 24 is opened rightward along with the movable armature, the distance of the movement of the pilot valve seat 24 is equal to the fit clearance between the pin 27 and the sleeve 251, at the moment, the internal pressure and the external pressure of the gas cylinder are balanced, at the moment, the internal pressure and the external pressure are balanced, the limiting component 25 and the valve core 26 move rightward along with the movable armature 23, at the moment, the valve core 26 is separated from the sealing surface of the main valve seat 5 and gradually moves away from the gas outlet 51, and the gas cylinder supplies gas.

Wherein the power storage elastic member 22 may be a coil spring.

In some embodiments, as shown in fig. 2, to facilitate the installation of the valve core 26, the limiting assembly 25 includes a sleeve 251 and a fixing base 252, the sleeve 251 is sleeved outside one end of the moving armature 23 facing away from the fixing portion 21, and a through hole is formed along the axial direction of the sleeve 251, the fixing base 252 is fixedly installed inside one end of the sleeve 251 facing away from the moving armature 23, the valve core 26 is slidably engaged with the sleeve 251 and extends out from the through hole on the fixing base 252, and the fixing base 252 can play a role of axially limiting the valve core 26.

The movable armature 23 and the sleeve 251 can be connected through a pin 27, the pin adopts an open thin-wall pin, and the pin and the movable armature 23 adopt interference fit and larger clearance fit with the sleeve 251.

In addition, the fixing base 252 can be in interference fit with the sleeve 251, and a gap is reserved between the fixing base 252 and the valve core 26, so that the valve core 26 can move freely in the axial direction.

In some embodiments, as shown in fig. 2, a first seal assembly 4 is provided between the moving armature 23 and the fastener 1, the first seal assembly 4 being configured to prevent leakage of gas from the engagement of the fastener 1 with the moving armature 23.

The first seal assembly 4 may include at least one of a first seal ring and a first retainer ring.

In at least one embodiment, the first seal ring is located on a side of the first collar facing away from the fixed portion 21. The first sealing ring and the first check ring can be made of materials with low friction coefficient, so that friction resistance during axial movement of the movable armature 23 is reduced, and electromagnetic force is not weakened.

In some embodiments, as shown in fig. 2, the electromagnetic valve further comprises a main valve seat 5 with an air outlet 51, and the main valve seat 5 is used to cooperate with the magnetomotive assembly 2 to realize opening and closing of the air outlet 51.

When the electromagnetic valve is not electrified, the inner pressure of the valve core 26 and the elastic force of the power storage elastic piece 22 can enable the valve core 26 to prop against the main valve seat 5, so that the air outlet 51 is blocked.

In at least one embodiment, the main valve seat 5 is made of non-metal materials, so that soft sealing is formed between the main valve seat 5 and the valve core 26, and larger electromagnetic force is not needed during sealing, so that the power of the electromagnetic valve is reduced, and heat generation is reduced.

An embodiment of the second aspect of the present utility model is to provide a bottle valve, as shown in fig. 1 and 2, where the bottle valve includes a housing 6 and the electromagnetic valve, an end of the fastener 1 and the magnetic assembly 2, which is away from the housing 3, is inserted into the housing 6 and forms an air supply channel with the housing 6, a second sealing assembly 7 is disposed between the fastener 1 and the housing 6, and the magnetic assembly 2 is configured to switch the on/off state of the air supply channel by changing the energizing state of the fixing portion 21.

Wherein, the side wall of the fastener 1 is provided with an air supply port 11. When the solenoid valve is energized, one end of the air supply passage communicates with the air supply port 11, and the other end communicates with the air outlet 51 via the space between the sleeve 251 and the fastener 1 and the space between the sleeve 251 and the housing 6.

The gas supply channel can be used for supplying hydrogen.

In some embodiments, the second seal assembly 7 may include at least one of a second seal ring and a second retainer ring.

In at least one embodiment, the second seal ring is located on a side of the second collar facing away from the fixed portion 21.

The bottle valve has the advantages of good sealing performance, compact structure, small size and the like.

An embodiment of the third aspect of the present utility model is to provide a gas cylinder, where the gas cylinder provided by the embodiment of the third aspect of the present utility model includes the above-mentioned electromagnetic valve or the above-mentioned cylinder valve.

The gas cylinder provided by the third aspect of the utility model is provided with the electromagnetic valve provided by the embodiment of the first aspect of the utility model or the cylinder valve provided by the embodiment of the second aspect of the utility model, so that the gas cylinder has all the beneficial effects of the electromagnetic valve provided by the embodiment of the first aspect of the utility model or the cylinder valve provided by the embodiment of the second aspect of the utility model.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. A solenoid valve, characterized by comprising a fastener (1), a magnetic assembly (2) and a housing (3), wherein the magnetic assembly (2) is provided with a fixed part (21) and a movable part which is in sliding fit with the fixed part (21) along the axial direction of the fastener (1);

the fixed part (21) is magnetically connected with the movable part in an electrified state, the fixed part (21) is positioned at one end of the fastener (1), and the movable part penetrates through the fastener (1) along the axial direction of the fastener (1) and is in sliding fit with the fastener (1);

the housing (3) has a hemming structure (31), and the housing (3) is clamped to the outside of the fastener (1) and the fixing portion (21) through the hemming structure (31) so as to define the axial position of the fixing portion (21) relative to the fastener (1).

2. The electromagnetic valve according to claim 1, characterized in that the fixed part (21) comprises a stationary armature (211) and a coil (212) located between the stationary armature (211) and the fastener (1) in the axial direction of the fastener (1);

one end of the static armature (211) deviating from the coil (212) is clamped with the hemming structure (31) so that the coil (212) is clamped between the fastener (1) and the static armature (211), and the other end of the static armature (211) stretches into a space surrounded by the coil (212);

one end of the movable part penetrates through the fastening piece (1) and is in sliding fit with the fastening piece (1), the other end of the movable part stretches into a space surrounded by the coil (212) and is arranged opposite to the static armature (211), and the movable part has a sliding degree of freedom relative to the coil (212) along the axial direction of the coil (212).

3. The electromagnetic valve according to claim 2, characterized in that the fixed part (21) further comprises a leakage-proof magnetic sleeve (213) sleeved outside the fixed armature (211) and the movable part, and the coil (212) is sleeved outside the leakage-proof magnetic sleeve (213);

and/or the material of the shell (3) is austenitic stainless steel.

4. A solenoid valve according to claim 3, characterised in that one of said leakage-proof magnetic sleeve (213) and said static armature (211) is shaped with a clamping groove and the other is shaped with a projection (2131) clamped into said clamping groove to define the axial position of said leakage-proof magnetic sleeve (213) with respect to said static armature (211).

5. The solenoid valve according to claim 1, characterized in that said movable portion comprises a force accumulating elastic member (22), a movable armature (23), a pilot valve seat (24), a limiting assembly (25) and a valve core (26);

one end of the movable armature (23) stretches into the fixed part (21) and is in sliding fit with the fixed part (21), the other end of the movable armature penetrates through the fastener (1) and is in sliding fit with the fastener (1), and the force accumulating elastic piece (22) is arranged between one end of the movable armature (23) stretching into the fixed part (21) and the fixed part (21);

the pilot valve seat (24) is installed in the movable armature (23) deviates from the end face of the fixed part (21), the limiting component (25) is sleeved outside the movable armature (23) deviating from one end of the fixed part (21), the valve core (26) is installed in the limiting component (25) in a sliding mode along the axial direction of the limiting component (25) and is opposite to the pilot valve seat (24), and one end of the valve core (26) deviating from the pilot valve seat (24) extends out of the limiting component (25).

6. The solenoid valve according to claim 5, characterized in that a first sealing assembly (4) is provided between the moving armature (23) and the fastener (1).

7. The electromagnetic valve according to claim 5, characterized in that the limit assembly (25) comprises a sleeve (251) and a fixed seat (252), the sleeve (251) is sleeved outside one end of the movable armature (23) facing away from the fixed portion (21), the fixed seat (252) is fixedly arranged inside one end of the sleeve (251) facing away from the movable armature (23), and the valve core (26) is slidably engaged with the sleeve (251) and extends from the fixed seat (252).

8. The electromagnetic valve according to claim 1, further comprising a main valve seat (5) having an air outlet (51), said main valve seat (5) being adapted to cooperate with said magnetomotive assembly (2) to effect opening and closing of said air outlet (51), said main valve seat (5) being of non-metallic material.

9. A bottle valve characterized by comprising a shell (6) and the electromagnetic valve according to any one of claims 1-8, wherein one end of the fastener (1) and the magnetic assembly (2) which jointly deviate from the shell (3) is inserted into the shell (6) and forms a gas supply channel with the shell (6), a second sealing assembly (7) is arranged between the fastener (1) and the shell (6), and the magnetic assembly (2) is configured to switch the on-off state of the gas supply channel by changing the energizing state of the fixing part (21).

10. A gas cylinder comprising a solenoid valve according to any one of claims 1 to 8 or a cylinder valve according to claim 9.