CN221347891U - Filter screen anti-blocking pilot type electromagnetic valve structure for hydrogen - Google Patents

Abstract

The utility model discloses a pilot-operated hydrogen electromagnetic valve structure with a filter screen preventing blockage, which comprises a valve body and a main valve core arranged in the valve body, wherein an electromagnet assembly is arranged on the valve body, and the electromagnet assembly is arranged in the pilot assembly, and is characterized in that: the main valve core is provided with an orifice which is communicated to the pressure relief cavity through a pressure relief channel, and filter components are arranged at the outlets of the orifice and the pressure relief channel. The filter screen anti-blocking pilot type electromagnetic valve structure for hydrogen has the advantages of simple structure, effective prevention of blocking of the electromagnetic valve, guarantee of normal use of the electromagnetic valve, prolonged service life, strong practicability and good application prospect.

Description

Filter screen anti-blocking pilot type electromagnetic valve structure for hydrogen

Technical Field

The utility model belongs to the technical field of automobiles, and particularly relates to an anti-blocking pilot type electromagnetic valve structure for hydrogen of a filter screen.

Background

Normally closed solenoid valves used in high pressure hydraulic or pneumatic systems often use pilot solenoid valves in order to ensure that the solenoid valve does not leak under high pressure. After the power is on, electromagnetic force attracts the pilot valve core, at the moment, the pilot channel is communicated with the pressure relief hole, the pressure of the cavity at the upper end of the main valve core is reduced, and the main valve core pushes the main valve core to open under the action of pressure difference between the upper cavity and the lower cavity.

The existing pilot electromagnetic valve has the main defects of low response speed, serious abrasion of sealing elements, easy blockage and the like, and causes the failure of the electromagnetic valve.

In the prior patent with the publication number of CN 110594479A, a pilot-operated electromagnetic valve in a bottleneck valve is disclosed, and the upper section of a valve body is connected with a valve cover with a sealing structure; the top surface of the valve body is provided with a sliding channel and a connecting through hole; the sliding valve core penetrates through the sliding channel, a connecting hole and a pilot hole are formed in the top surface of the sliding valve core, the fixed iron core is propped against the valve cover, the lower section of the fixed iron core is fixed to the top of the sliding channel through the connecting sleeve, and an electromagnetic coil is arranged among the fixed iron core, the connecting sleeve and the valve cover; a movable iron core formed by a first movable iron core and a second movable iron core is arranged in the connecting sleeve, and the second movable iron core is inserted into the connecting hole; the top of the sleeve is clamped and embedded in an annular clamping groove on the side wall of the first movable iron core through a clamping plate, and the bottom of the sleeve is blocked below a collar at the top end of the sliding valve core through an annular baffle plate; a spring is arranged between the fixed iron core and the movable iron core; the side wall of the sliding valve core is provided with a plurality of small holes which penetrate through the side wall of the bottom of the connecting hole at intervals. The connecting sleeve in the electromagnetic valve is connected with the valve body and the fixed iron core, the movable iron core drives the sleeve to move up and down, the moving part formed by the movable iron core is large in mass, the fixed part is easy to generate large impact to cause abrasion, and large particles generated by the impact are easy to fall into the pressure release hole to cause blockage. Therefore, there is a need to develop a pilot operated solenoid valve for hydrogen to meet the needs of fuel cell technology development and other industries.

Disclosure of utility model

The utility model aims to solve the problems in the prior art and provides a filter screen anti-blocking pilot type hydrogen electromagnetic valve structure which is simple in structure, can effectively prevent electromagnetic valves from being blocked, ensures normal use of the electromagnetic valves and prolongs service life.

In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: the provided filter screen anti-blocking pilot type electromagnetic valve structure for hydrogen comprises a valve body and a main valve core arranged in the valve body, wherein an electromagnet assembly is arranged on the valve body, and the electromagnet assembly is arranged in the pilot assembly, and is characterized in that: the main valve core is provided with an orifice which is communicated to the pressure relief cavity through a pressure relief channel, and filter components are arranged at the outlets of the orifice and the pressure relief channel.

In order to make the above technical solution more detailed and concrete, the present utility model further provides the following preferred technical solutions, so as to obtain a satisfactory practical effect:

The throttle hole is provided with a filter screen A which is connected to the threaded sleeve and is connected to the valve body through the threaded sleeve.

The pressure relief channel outlet is provided with a filter screen B, and the filter screen B is connected to the threaded cover plate and connected to the upper end of the valve body through the threaded cover plate.

And a sealing ring is arranged on the side wall of the valve body.

The valve body is characterized in that a main valve seat is arranged below the valve body, an outlet cavity is arranged on the main valve seat, and a main valve seat sealing gasket is arranged between the valve body and the main valve seat.

The electromagnet assembly comprises a nozzle body, a coil and a magnetism isolating sleeve arranged in the coil; a gasket is arranged between the valve body and the nozzle body.

The pilot assembly comprises an armature arranged in the magnetism isolating sleeve.

A tightening cap is arranged above the armature, and a spring is arranged between the tightening cap and the armature.

And a pilot seal piece opposite to the upper end of the main valve core is arranged below the armature.

And the tightening cap is provided with a compression nut.

Compared with the prior art, the utility model has the following advantages: the filter screen anti-blocking pilot type electromagnetic valve structure for hydrogen has the advantages of simple structure, effective prevention of blocking of the electromagnetic valve, guarantee of normal use of the electromagnetic valve, prolonged service life, strong practicability and good application prospect.

Drawings

The contents expressed in the drawings of the present specification and the marks in the drawings are briefly described as follows:

FIG. 1 is a schematic diagram of a pilot-operated hydrogen solenoid valve with a mesh filter screen for preventing clogging in an embodiment of the utility model;

FIG. 2 is a schematic diagram of the solenoid valve structure pilot valve opening operation according to an embodiment of the present utility model;

FIG. 3 is a schematic diagram of the solenoid valve structure of the present utility model illustrating the operation of opening the main valve;

FIG. 4 is a schematic view of a filter assembly of a solenoid valve according to an embodiment of the utility model 1;

FIG. 5 is a schematic view of a filter assembly of a solenoid valve according to an embodiment of the utility model, FIG. 2;

FIG. 6 is a schematic diagram of a solenoid assembly of a solenoid valve according to an embodiment of the utility model;

FIG. 7 is a schematic diagram of a pilot assembly of a solenoid valve according to an embodiment of the utility model;

FIG. 8 is a schematic diagram of a main valve assembly of a solenoid valve according to an embodiment of the utility model.

Marked in the figure as: 01. tightening the cap; 02. a compression nut; 03. a magnetism isolating sleeve; 04. a coil; 05. a spring; 06. a pilot seal; 07. a gasket; 08. a seal ring; 09. a valve body; 10. a primary valve seat sealing gasket; 11. a main valve seat; 12. a main spool; 13. a nozzle body; 14. an armature; 15. an orifice; 16. a pressure relief channel; 17. a pressure relief cavity; 18. an axial passage; 19. an outlet chamber; 20. a threaded sleeve; 21. a filter screen A; 22. a threaded cover plate; 23. and a filter screen B.

Detailed Description

The following description of the embodiments of the present utility model refers to the accompanying drawings, which illustrate in further detail.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "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.

According to the anti-blocking pilot type electromagnetic valve structure for hydrogen of the mesh filter screen, as shown in fig. 1, the button filter screen A is fixed at the inlet of the orifice through the threaded sleeve and is used for filtering large particles in gas entering the electromagnetic valve, so that the large particles in the gas can not enter the orifice to block the orifice, the button filter screen B is fixed at the outlet of the pressure relief channel through the threaded cover plate, worn particles can not enter the pressure relief channel to block the orifice and the pressure relief channel, and when the valve is opened, due to the fact that pressure difference exists between the orifice and the pressure relief channel, even small particles passing through the filter screen can be extruded out of the orifice and the pressure relief channel by air flow under the action of pressure difference between the two sides, and therefore the orifice and the pressure relief channel can not be blocked under the condition of the small particles.

The gas entering the electromagnetic valve may contain particle dust, and the particle causes the pressure relief hole to be blocked along with the gas passing through the pressure relief hole, thereby causing the failure of the pilot valve. The electromagnetic valve armature can be worn under repeated impact, and worn particles can drop into the pressure relief hole to cause blockage, so that the pilot valve is invalid. The utility model adopts the design that the filter component is additionally arranged at the inlet of the throttle orifice 15 of the main valve core, and filters larger particle impurities in the gas entering the electromagnetic valve, thereby ensuring that the throttle orifice 15 and the pressure release channel 16 are not blocked by the gas, and ensuring that the electromagnetic valve can work normally and stably. This patent installs filter unit additional in pressure release passageway export top, has prevented great granule impurity such as wearing and tearing particulate matter to fall into the pressure release hole in to guaranteed that gas can not block orifice 15 and pressure release passageway 16, thereby guaranteed that the solenoid valve can supply normal steady operation. At the moment of opening the main valve, the pilot electromagnetic valve can press out smaller particles by the pressure difference between the throttle orifice 15 and the two sides of the pressure release channel 16, so that the electromagnetic valve is prevented from being blocked by the smaller particles. The utility model is a channel symmetrical pilot electromagnetic valve structure with good durability, good sealing performance, high pressure-resistant grade and high response speed.

The filter screen anti-blocking pilot type electromagnetic valve structure for hydrogen consists of a tightening cap 01, a compression nut 02, a magnetism isolating sleeve 03, a coil 04, a spring 05, a pilot sealing piece 06, a gasket 07, a sealing ring 08, a valve body 09, a main valve seat sealing gasket 10, a main valve seat 11, a main valve core 12, a nozzle body 13, an armature 14, a threaded sleeve 20, a button type filter screen A21, a threaded cover plate 22 and a button type filter screen B23, and is structurally divided into a filter assembly, an electromagnet assembly, a pilot valve assembly and a main valve assembly, and is structurally divided into an armature limiting structure and a main valve limiting structure from the limiting function.

As shown in fig. 4, 5 and 8, an inlet is formed in the valve body, a cavity between the main valve core 12 and the armature 14 is a pressure relief cavity 17, an orifice 15 and a pressure relief channel 16 are formed in the main valve core 12, the orifice 15 is communicated with inlet gas through a button type filter screen a21, the orifice 15 is communicated with the pressure relief channel 16, the pressure relief channel 16 is communicated with the pressure relief cavity 17 through a button type filter screen B23, the main valve core 12 is provided with an axial channel 18, the axial channel 18 is communicated with an outlet cavity 19 on the main valve seat 11, the button type filter screen a21 is fixed at the inlet of the orifice 15 through a threaded sleeve 20, the effect is that large particles in gas entering the electromagnetic valve are filtered, the large particles in the gas are guaranteed not to enter the orifice 15 so as to block the orifice 15, the button type filter screen B23 is fixed at the outlet of the pressure relief channel through a threaded cover plate 22, the worn particles are guaranteed not to enter the pressure relief channel so as to block the orifice and the pressure relief channel, and when the valve is opened, due to the fact that the pressure difference between the orifice 15 and the pressure relief channel 16 is formed, even small particles passing through the filter screen are extruded out of the air flow under the pressure difference on both sides of the pressure difference effect of the orifice and the pressure relief channel, so that the pressure is guaranteed not to block the pressure relief channel.

As shown in fig. 4 and 5, the above-mentioned filter assembly is composed of a threaded sleeve 20, a button-type filter screen a21, a threaded cover plate 22, and a button-type filter screen B23, the threaded sleeve 20 is fixed to the main valve core 12 by screwing, the button-type filter screen a21 is fixed to a through hole of the threaded sleeve 20 for filtering gas entering the orifice 15, the threaded cover plate 22 is fixed to the main valve core 12 by screwing, and the button-type filter screen B23 is fixed to the through hole of the threaded sleeve 20 for preventing particles above from falling into the pressure release hole. The button type filter screen A21 is fixed by the threaded sleeve 20, the button type filter screen B23 is fixed by the threaded cover plate 22, and the threaded installation is convenient for disassembling and cleaning the filter screen.

As shown in fig. 8, the main valve assembly comprises a main valve core 12, a sealing ring 08, a gasket 07, a valve body 09, a main valve seat 11 and a main valve seat sealing gasket 10, wherein the sealing ring 08 is positioned at a sealing ring groove on the main valve core 12, clearance leakage between the valve body 09 and the main valve core 12 is eliminated through the sealing ring 08, a cavity in the valve body is divided by the sealing ring 08, the upper end of the sealing ring 08 is communicated with the pressure release cavity 17, the lower end of the sealing ring 08 is communicated with the inlet of the valve body 09, the gasket 07 is installed at an inner hole of a nozzle body 13 and is used for axially positioning the main valve core 12, the main valve core 12 moves up and down between the main valve seat sealing gasket 10 and the gasket 07, the main valve seat sealing gasket 10 is installed on the valve body through the main valve seat, and a sealing mode between the main valve seat sealing gasket 10 and the main valve core 12 is a plane sealing mode, or a conical surface sealing mode.

As shown in fig. 7, the pilot valve assembly comprises an armature 14, a pilot seal 06 and a spring 05, wherein the pilot seal 06 is nested at the lower end of the armature 14, and the armature 14 drives the pilot seal 06 to move up and down. The sealing mode between the pilot sealing piece 06 and the main valve core is plane sealing, conical surface sealing or spherical sealing, two ends of the spring 05 are respectively connected with the spring pressure-resistant seat and the armature 14 in the pilot valve assembly, and the armature 14 can move up and down.

As shown in fig. 6, the electromagnet assembly comprises a magnetism isolating sleeve 03, a coil 04, a compression nut 02, a tightening cap 01, a spring pressure-resistant seat and a nozzle body 13 which are connected. The armature 14 moves up and down in the inner holes of the magnetism isolating sleeve 03 and the nozzle body 13, the armature 14 contacts with the tight cap 01 when moving up to the top to form an upper limit, and the armature moves down to form a lower limit when the pilot seal 06 contacts with the main valve core 12.

The gasket 07 is mounted on the nozzle body 13 by the valve body 09, the main valve core 12 is mounted in the valve body 09, the main valve seat sealing gasket 10 is mounted on the valve body 09 through the main valve seat 11, so that the upper limit is reached when the main valve core 12 moves upwards to be in contact with the gasket 07, and the lower limit is reached when the main valve core 12 moves downwards to be in contact with the main valve seat sealing gasket 10.

As shown in fig. 2 and 3, in operation, the coil 04 is energized, the armature 14 moves upward against the force of the spring 05, the pressure relief chamber 17 becomes larger in space, the pressure of the pressure relief chamber of the lower chamber of the sealing ring 08 communicated with the inlet is greater than the pressure of the pressure relief chamber of the lower chamber of the sealing ring 08, the main valve core 12 moves upward under the action of the pressure difference until reaching the upper limit when contacting the gasket 07, at this time, the inlet of the valve body is communicated with the outlet chamber 19 on the main valve seat 11, and the valve is opened.

The filter screen anti-blocking pilot type electromagnetic valve structure for hydrogen has the advantages of simple structure, effective prevention of blocking of the electromagnetic valve, guarantee of normal use of the electromagnetic valve, prolonged service life, strong practicability and good application prospect.

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. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

The utility model has been described above by way of example with reference to the accompanying drawings, but the utility model is not limited to the above, as long as various insubstantial modifications by the method concepts and technical solutions of the utility model or direct application to other applications are within the scope of the utility model.

Claims (10)

1. The utility model provides a filter screen anti-blocking pilot formula solenoid valve structure for hydrogen, includes the valve body and locates the internal main valve core of valve be equipped with electromagnet assembly on the valve body, locate pilot assembly in the electromagnet assembly, its characterized in that: the main valve core is provided with an orifice which is communicated to the pressure relief cavity through a pressure relief channel, and filter components are arranged at the outlets of the orifice and the pressure relief channel.

2. The filter screen anti-clogging pilot operated hydrogen solenoid valve structure as set forth in claim 1, wherein: the throttle hole is provided with a filter screen A which is connected to the threaded sleeve and is connected to the valve body through the threaded sleeve.

3. The filter screen anti-clogging pilot operated hydrogen solenoid valve structure as set forth in claim 1, wherein: the pressure relief channel outlet is provided with a filter screen B, and the filter screen B is connected to the threaded cover plate and connected to the upper end of the valve body through the threaded cover plate.

4. A filter screen anti-clogging pilot operated hydrogen solenoid valve structure according to any one of claims 1 to 3, characterized in that: and a sealing ring is arranged on the side wall of the valve body.

5. The filter screen anti-clogging pilot operated hydrogen solenoid valve structure as set forth in claim 4, wherein: the valve body is characterized in that a main valve seat is arranged below the valve body, an outlet cavity is arranged on the main valve seat, and a main valve seat sealing gasket is arranged between the valve body and the main valve seat.

6. The filter screen anti-clogging pilot operated hydrogen solenoid valve structure as set forth in claim 5, wherein: the electromagnet assembly comprises a nozzle body, a coil and a magnetism isolating sleeve arranged in the coil; a gasket is arranged between the valve body and the nozzle body.

7. The filter screen anti-clogging pilot operated hydrogen solenoid valve structure as set forth in claim 6, wherein: the pilot assembly comprises an armature arranged in the magnetism isolating sleeve.

8. The filter screen anti-clogging pilot operated solenoid valve for hydrogen according to claim 7, wherein: a tightening cap is arranged above the armature, and a spring is arranged between the tightening cap and the armature.

9. The filter screen anti-clogging pilot operated solenoid valve for hydrogen according to claim 8, wherein: and a pilot seal piece opposite to the upper end of the main valve core is arranged below the armature.

10. The filter screen anti-clogging pilot operated solenoid valve for hydrogen according to claim 8, wherein: and the tightening cap is provided with a compression nut.