CN112855960A - Double-valve-core electromagnetic valve - Google Patents

Double-valve-core electromagnetic valve Download PDF

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Publication number
CN112855960A
CN112855960A CN202110268670.1A CN202110268670A CN112855960A CN 112855960 A CN112855960 A CN 112855960A CN 202110268670 A CN202110268670 A CN 202110268670A CN 112855960 A CN112855960 A CN 112855960A
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CN
China
Prior art keywords
valve core
assembly
spool
block
valve
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202110268670.1A
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Chinese (zh)
Inventor
杨阳
张瑞琦
何志新
张卫佳
赵路遥
谢智能
曹振玲
俞畅
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Anhui East China Institute of Optoelectronic Technology
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Anhui East China Institute of Optoelectronic Technology
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Publication date
Application filed by Anhui East China Institute of Optoelectronic Technology filed Critical Anhui East China Institute of Optoelectronic Technology
Priority to CN202110268670.1A priority Critical patent/CN112855960A/en
Publication of CN112855960A publication Critical patent/CN112855960A/en
Pending legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/36—Valve members
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/02—Filters adapted for location in special places, e.g. pipe-lines, pumps, stop-cocks
    • B01D35/04—Plug, tap, or cock filters filtering elements mounted in or on a faucet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32—Details
    • F16K1/34—Cutting-off parts, e.g. valve members, seats
    • F16K1/44—Details of seats or valve members of double-seat valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/02—Construction of housing; Use of materials therefor of lift valves
    • F16K27/029—Electromagnetically actuated valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0644—One-way valve
    • F16K31/0655—Lift valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00—Actuating devices; Operating means; Releasing devices
    • F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
    • F16K31/06—Actuating devices; Operating means; Releasing devices electric; magnetic using a magnet, e.g. diaphragm valves, cutting off by means of a liquid
    • F16K31/0675—Electromagnet aspects, e.g. electric supply therefor

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Water Supply & Treatment (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Magnetically Actuated Valves (AREA)

Abstract

The invention relates to the field of electromagnetic valves, in particular to a double-valve-core electromagnetic valve which comprises a coil assembly and a valve core assembly; the coil assembly is sleeved on the valve core assembly; the coil assembly comprises a shell, the inner side of the shell is hollow to form a main flow channel, and a coil is arranged on the outer side of the shell; the valve core assembly comprises an upper valve core assembly and a lower valve core assembly, and the upper valve core assembly and the lower valve core assembly are distributed at two ends of the coil assembly. The invention discloses a double-valve-core electromagnetic valve, which adopts a double-valve-core structure for sealing, can keep a long-term sealing effect, and can shorten the response time of the electromagnetic valve by adopting a cylindrical spring and a disc spring to realize the return of a valve core block.

Description

Double-valve-core electromagnetic valve
Technical Field
The invention relates to the field of electromagnetic valves, in particular to a double-valve-core electromagnetic valve.
Background
The solenoid valve is a commonly used control component, and because the application fields of the solenoid valve are different, the sealing performance and the response requirement of the solenoid valve are different, so when the solenoid valve is required to be applied to equipment with good sealing performance and fast response, the traditional direct-acting solenoid valve may not meet the practical use requirements, such as some systems in the fields of satellites, weapons, electric propulsion and the like.
It is now necessary to optimize the design of conventional solenoid valves.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide the electromagnetic valve structure with low part manufacturing requirement precision and good sealing performance.
In order to achieve the purpose, the invention adopts the technical scheme that:
a double-spool electromagnetic valve comprises a coil assembly and a spool assembly; the coil assembly is sleeved on the valve core assembly; the coil assembly comprises a shell, the inner side of the shell is hollow to form a main flow channel, and a coil is arranged on the outer side of the shell; the valve core assembly comprises an upper valve core assembly and a lower valve core assembly, and the upper valve core assembly and the lower valve core assembly are distributed at two ends of the coil assembly.
The upper valve core assembly comprises an upper valve seat and a valve core piece which are arranged on the main flow channel, the upper valve seat is matched with the valve core piece for use, and a first connecting hole is formed in the upper valve seat; the lower valve core assembly comprises a valve core piece arranged in the main flow channel and a lower valve seat arranged at the end part of the coil assembly; the lower valve seat and the valve core piece are oppositely arranged and matched for use; the lower valve seat is provided with a second communicating hole; the valve core piece comprises a valve core block, and a communicating channel is arranged on the valve core block.
And a sealing part is arranged on one side of the valve core block, which is attached to the lower valve seat or the upper valve seat.
The sealing part comprises a connecting groove arranged on the valve core block, and a sealing block is arranged in the connecting groove; the sealing block is arranged in a protruding connection groove.
The valve core piece is further connected with a return mechanism, and the return mechanism comprises a cylindrical spring connected with the valve core block.
One end of a cylindrical spring in the upper valve core assembly is connected with the valve core block, the other end of the cylindrical spring is connected to a spring block, and the spring block is arranged at the end part of the main flow channel; a third communicating hole is formed in the spring block; one end of a cylindrical spring in the lower valve core component is connected with the corresponding valve core block, and the other end of the cylindrical spring is connected with an upper valve seat in the upper valve core piece.
The return mechanism also comprises a disc spring arranged in the upper valve core assembly or the lower valve core assembly; a disc spring for assisting in returning is arranged between the spring block and the valve core block in the upper valve core assembly; and a disc spring for assisting the return is arranged between an upper valve seat in the upper valve core assembly and a valve core block in the lower valve core assembly.
The end part of the shell is provided with a communicating nozzle, a nozzle channel is arranged on the communicating nozzle, and a filtering component is arranged in the nozzle channel; the filter component comprises a filter screen bracket, and a filter screen is arranged on the filter screen bracket; the filter screen is connected with the filter screen bracket through the supporting net.
The filter assembly further comprises a baffle ring, and the baffle ring is pressed on the filter screen.
Adjusting gaskets are arranged between the communicating nozzle and the shell and between the lower valve seat and the shell.
The invention has the advantages that:
the invention discloses a double-valve-core electromagnetic valve, which adopts a double-valve-core structure for sealing, can keep a long-term sealing effect, and can shorten the response time of the electromagnetic valve by adopting a cylindrical spring and a disc spring to realize the return of a valve core block.
Drawings
The contents of the expressions in the various figures of the present specification and the labels in the figures are briefly described as follows:
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic structural view of a coil assembly according to the present invention.
Fig. 3 is a schematic structural view of the valve core member of the present invention.
Fig. 4 is a schematic structural view of the valve core member of the present invention after optimization.
FIG. 5 is a schematic view of the filter assembly of the present invention.
The labels in the above figures are:
1. coil pack, 2, case subassembly, 3, intercommunication nipple, 4, filtering component, 5, adjusting shim.
Detailed Description
The following description of preferred embodiments of the invention will be made in further detail with reference to the accompanying drawings.
A double-spool electromagnetic valve comprises a coil assembly 1 and a spool assembly 2; the coil component 1 is sleeved on the valve core component 2; the coil assembly 1 comprises a shell 12, wherein the inner side of the shell 12 is hollow to form a main flow passage 1-1, and a coil 11 is arranged on the outer side of the shell 12; the valve core assembly 2 comprises an upper valve core assembly 21 and a lower valve core assembly 22, and the upper valve core assembly 21 and the lower valve core assembly 22 are distributed at two ends of the coil assembly 1; the invention discloses a double-valve-core electromagnetic valve, which mainly comprises a coil assembly 1, wherein the coil assembly 1 provides a basic connection function, and simultaneously facilitates the subsequent generation of a magnetic field to enable a valve core assembly 2 to move so as to realize the flowing of a medium in the electromagnetic valve; meanwhile, the valve core assembly 2 comprises an upper valve core assembly 21 and a lower valve core assembly 22, the upper valve core assembly 21 and the lower valve core assembly 22 are distributed at two ends of the coil assembly 1, and the upper valve core assembly 21 and the lower valve core assembly 22 are distributed at two ends of the main flow channel 1-1 during actual assembly; namely, the electromagnetic valve disclosed by the invention adopts two valve cores to be matched for use, so that the set sealing effect can be easily achieved; for example, the solenoid valve used in a system such as a satellite generally requires an internal leakage rate of less than or equal to 1 × 10-6Pa · m3/s, and the solenoid valve using a single valve core needs to realize the leakage rate requirement by using a complex process method, and the leakage is easy to generate if the solenoid valve has a long on-track time; by adopting the two valve core assemblies 2, the invention can easily achieve the internal leakage rate of less than or equal to 1 x 10 < -7 > Pa.m 3/s without precise processing, and can keep the on-track leakage rate index for a long time and still meet the requirement.
Based on the above structure, the main structure of the upper and lower spool assemblies 21 and 22 of the present invention is as follows:
in the invention, the upper valve core assembly 21 comprises an upper valve seat 212 arranged on the main flow passage 1-1 and a valve core component 2-1, the upper valve seat 212 is matched with the valve core component 2-1 for use, and a first communication hole 213 is arranged on the upper valve seat 212; during actual assembly, the upper valve seat 212 is arranged inside the main flow channel 1-1 and is fixedly connected with the inner wall of the main flow channel 1-1, the structure of the upper valve seat 212 can be selected according to requirements, and a cylindrical block is generally adopted to fill the inside of the main flow channel 1-1; meanwhile, in order to ensure the normal circulation of the medium, a first connection hole 213 is formed in the upper valve seat 212, and the first connection hole penetrates through the upper valve seat 212; the valve core component 2-1 in the upper valve core component 21 is matched with the upper valve seat 212 for use, when the valve core component 2-1 is contacted with the upper valve seat 212, a closing effect is achieved, circulation of media in the electromagnetic valve is avoided, and when the valve core component 2-1 is separated from the upper valve seat 212, the media can pass through the upper valve core component 21 and circulate in the electromagnetic valve; in addition, the lower spool assembly 22 in the present invention includes a spool member 2-1 disposed in the main flow passage 1-1 and a lower valve seat 221 disposed at an end of the coil assembly 1; the lower valve seat 221 and the valve core component 2-1 are oppositely arranged and matched for use; the lower valve seat 221 is provided with a second communicating hole; the valve core piece 2-1 comprises a valve core piece 2-11, and a communication channel is arranged on the valve core piece 2-11; the matching mode and function of the valve core component 2-1 and the lower valve seat 221 in the lower valve core component 22 are similar to those of the upper valve core component 21, and the description is omitted; according to the invention, the double valve core assemblies 2 are adopted to seal and control the on-off of the electromagnetic valve, so that the manufacturing precision of parts can be reduced, and the internal leakage rate of the electromagnetic valve can be kept lower than a set standard for a long time by matching the two valve core assemblies 2; not only can improve the processing efficiency, but also can reduce the production cost.
Preferably, a sealing part 2-5 is arranged on one side of the valve core block 2-11, which is attached to the lower valve seat 221 or the upper valve seat 212; the sealing part 2-5 is arranged, so that the sealing effect of the electromagnetic valve can be optimized, specifically, the sealing part 2-5 comprises a connecting groove 2-51 arranged on a valve core block 2-11, and a sealing block 2-52 is arranged in the connecting groove 2-51; the sealing blocks 2-52 are injection-molded in the connecting grooves 2-51 through an injection molding process, in addition, the vertical sections of the connecting grooves 2-51 are in a trapezoid structure, and one open end of each connecting groove 2-51 faces the outer side of the valve core block 2-11, so that the valve core block 2-11 has a binding effect on the sealing blocks 2-52, and the problem that the sealing blocks 2-52 are separated from the valve core blocks 2-11 is avoided; in addition, in order to guarantee the sealing effect, the sealing block 2-52 is convexly arranged on the connecting groove 2-51; that is, in the specific arrangement, when the sealing block 2-52 has a part of the protruding connecting groove 2-51, that is, when a part of the sealing block 2-52 is in a leakage state, such arrangement enables the sealing block 2-52 to block and seal the first connecting hole 213 or the second connecting hole on the upper valve seat 212 or the lower valve seat 221 by the self-compression deformation when the valve core block 2-11 is in contact with the upper valve seat 212 or the lower valve seat 221, which can better ensure the sealing effect.
Preferably, the valve core component 2-1 is further connected with a return mechanism, and the return mechanism comprises a cylindrical spring 2-2 connected with the valve core block 2-11; the arrangement of the cylindrical spring 2-2 is convenient for the return of the valve core block 2-11, because the valve core block 2-11 can transversely move to be separated from the upper valve seat 212 or the lower valve seat 221 under the driving of electromagnetic force when the electromagnetic valve is used, and the valve core block 2-11 which needs to be moved returns when the electromagnetic valve is not used, the arrangement of the cylindrical spring 2-2 and the cylindrical spring 2-2 can realize the quick return of the moved valve core block 2-11 and continuously press the valve core block 2-11 at the same time, so that the valve core block 2-11 is tightly attached to the lower valve seat 221 or the upper valve seat 212, and the self-sealing performance of the electromagnetic valve is better ensured.
Preferably, one end of a cylindrical spring 2-2 in the upper valve core assembly 21 of the present invention is connected with the valve core block 2-11, and the other end is connected to a spring block 211, wherein the spring block 211 is arranged at the end of the main flow channel 1-1; the spring block 211 is provided with a third communicating hole; the spring block 211 is arranged to facilitate the connection of one end of the cylindrical spring 2-2 far away from the upper valve seat 212, so as to play a supporting role, meanwhile, in order to ensure the connection stability of the cylindrical spring 2-2, the spring block 211 is provided with a spring hole 2-4, the arrangement of the spring hole 2-4 facilitates the direct connection of the cylindrical spring 2-2 and the spring block 211, and the cylindrical spring 2-2 is prevented from being deflected when being compressed; in addition, in the invention, the valve core block 2-11 in the upper valve core assembly 21 is used for pressing the cylindrical spring 2-2 in order to match the spring block 211; the upper valve core assembly 21 can also be provided with a groove structure for placing the cylindrical spring 2-2 on the valve core block 2-11, in order to reduce the production cost, a communication channel on the valve core block 2-11 can be made into a stepped hole at the side close to the cylindrical spring 2-2, and the positioning of the cylindrical spring 2-2 can be realized without influencing the flow of a medium in the valve core block 2-11 by the arrangement, and the specific arrangement mode can be selected according to the requirement; similarly, one end of the cylindrical spring 2-2 in the lower valve core assembly 22 is connected with the corresponding valve core block 2-11, and the other end is connected with the upper valve seat 212 in the upper valve core piece 2-1; in order to ensure the stability of the placement of the cylindrical spring 2-2, a spring hole 2-4 is formed in the upper valve seat 212 of the upper valve core assembly 21 on the side close to the lower valve seat 221, and similarly, the valve core block 2-11 of the lower valve core assembly 22 may also be provided with a groove structure or a communication channel formed as a stepped hole or the like.
Preferably, the return mechanism in the invention further comprises a disc spring 2-3 arranged in the upper valve core assembly 21 or the lower valve core assembly 22; a disc spring 2-3 for assisting return is arranged between the spring block 211 and a valve core block 2-11 in the upper valve core assembly 21; a disc spring 2-3 for assisting in returning is arranged between an upper valve seat 212 in the upper valve core assembly 21 and a valve core block 2-11 in the lower valve core assembly 22; the disc spring 2-3 is arranged to have an effect of quickly realizing the return of the valve core; the structure type that the cylindrical spring 2-2 and the disc spring are loaded together is adopted, acting force is provided for closing and releasing of the valve core assembly 2, the releasing speed is improved by utilizing the characteristic of larger instantaneous loading force of the disc spring, the response time of the electromagnetic valve is shortened, and meanwhile, the disc spring 2-3 plays a role in magnetic isolation when the valve core is opened, so that the response time of the electromagnetic valve is further shortened; the cylindrical spring 2-2 is used for providing continuous reset force and sealing closing force in the valve core releasing process, and the combined loading structure saves the installation space and improves the performance of the electromagnetic valve; meanwhile, the size of the disc spring 2-3 can be selected according to the requirement, and the connection mode of the disc spring 2-3 and the adjacent part can adopt a proper connection mode according to the requirement, such as welding, cementing and the like.
Preferably, the end of the shell 12 is provided with the communicating nozzle 3, the communicating nozzle 3 is provided with the nozzle channel 31, and the communicating nozzle 3 is arranged, so that the connection between the electromagnetic valve and the adjacent component is facilitated; meanwhile, as optimization, the filter assembly 4 is arranged in the nozzle channel 31; the filter assembly 4 comprises a filter screen bracket 42, and a filter screen 41 is arranged on the filter screen bracket 42; the filter screen 41 is connected with the filter screen bracket 42 through a supporting screen 43; the filter screen 41 is arranged to filter impurities in the medium, so that the impurities are prevented from entering the valve core assembly 2 to influence the matching or sealing between the valve core assemblies 2; the filter screen bracket 42 plays a good supporting role, and avoids the damage of the filter screen 41 caused by the large impact of the overlarge flow velocity of the medium; simultaneously for the intensity of better assurance filter screen 41, be equipped with supporting net 43 between filter screen 41 and filter screen support 42, supporting net 43 from the side, supporting net 43 and filter screen 41 pile up the setting, and supporting net 43 can provide more comprehensive support for filter screen 41, the structural strength of filter screen 41 that has guaranteed better.
Preferably, the filter assembly 4 of the present invention further comprises a baffle ring 44, wherein the baffle ring 44 is pressed on the filter screen; the baffle ring 44 and the filter screen support are distributed on two sides of the filter screen 41, so that the connection of the filter screen 41 is facilitated, and the later arrangement is also facilitated; the filter screen bracket 42 comprises a bracket body, a limiting bulge 421 is arranged at the edge of the bracket body, and the limiting bulge 421 of the filter screen bracket 42 is clamped in a limiting groove 441 on the baffle ring 44; due to the arrangement, the filter screen bracket 42 and the baffle ring 44 are in clamping connection, so that the baffle ring 44 and the filter screen bracket 42 can be conveniently connected; meanwhile, in order to ensure the stability of the whole device, the filter screen bracket 42 and the baffle ring 44 can be connected in a welding mode in the invention; the specific arrangement relation can be shown by referring to the attached drawings.
Meanwhile, as a larger optimization, in the invention, one side of the spring block 211, which is close to the communication connector 3, is provided with a positioning groove 2111, and the positioning groove 2111 is matched with the filter screen bracket 42; the arrangement of the positioning groove 2111 enables the filter component 4 to be clamped at the end part of the spring block 211, and the positioning groove 2111 has a positioning and limiting effect; during actual assembly, the communicating nozzle 3 is connected with the shell 12 in a welding mode, and the communicating nozzle 3 interacts with the spring block 211 to compress and fix the filter assembly 4; of course, if a more stable connection is desired, the adjacent components may be secured by welding.
Preferably, in the present invention, adjusting gaskets 5 are disposed between the communication nozzle 3 and the housing and between the lower valve seat 221 and the housing; the setting of the adjusting shim 5 can adjust the stroke of the upper valve core assembly 21 or the lower valve core assembly 22 according to the requirement, and the application range of the invention can be improved to a certain extent.
The above-mentioned statements are respectively to discuss the electromagnetic valve disclosed by the invention, and are discussed below by combining with a specific structure;
the invention particularly discloses a double-spool electromagnetic valve which comprises a coil assembly 1, a spool assembly 2, a filter screen assembly, a communication nozzle 3, a spring block 211, a disc spring 2-3, a cylindrical spring 2-2, an upper valve seat 212, a lower valve seat 221, a disc spring 2-3, an adjusting gasket 5 and the like.
The valve core assembly 2 comprises an upper valve core assembly 21, and the upper valve core assembly 21 is arranged in a left cavity of the coil assembly 1 and forms a first seal with the upper valve seat 212; the upper valve core assembly 21 is arranged in a left cavity of the coil assembly 1, and the upper valve core assembly 21 is tightly pressed at a sealing edge of the left cavity of the coil assembly 1 through a cylindrical spring 2-2 and a disc spring 2-3; one end of the cylindrical spring 2-2 is arranged in a spring hole 2-4 of a spring block 211 in the upper valve core assembly 21, and the other end of the cylindrical spring is arranged in a groove of the valve core block 2-11; the spring block 211 is fixed on the left side of the upper valve core assembly 21 through the communicating nozzle 3 and compresses the cylindrical spring 2-2; the disc spring 2-3 is arranged between the spring block 211 and the upper valve core assembly 21; the filter screen assembly is arranged in the communicating nozzle 3; the communicating nozzle 3 is connected with the coil assembly 1 through welding;
meanwhile, the valve core assembly 2 further comprises a lower valve core assembly 22, and the lower valve core assembly 22 is arranged in a right cavity of the coil assembly 1; one end of a cylindrical spring 2-2 in the lower valve core assembly 22 is arranged in a spring hole 2-4 on the right side of the upper valve core, the other end of the cylindrical spring is arranged in a groove hole of a valve core block 2-11 in the lower valve core assembly 22, the lower valve core assembly 22 is pressed on the cylindrical spring 2-2 through a lower valve seat 221, and the lower valve core assembly 22 and the lower valve seat 221 are sealed at the cutting edge of the lower valve seat 221 through the pressing spring force; the lower valve seat 221 is connected with the right cavity of the coil assembly 1 through threads; the lower valve seat 221 is screwed into the right cavity of the coil component 1 through threads, and the lower valve core component 22 and the spring are tightly pressed to realize a second sealing; the shim 5 is mounted under the threads of the lower valve seat 221.
In addition, the upper valve core assembly 21 and the lower valve core assembly 22 are approximately the same in structure, the valve core assembly 2-1 is mainly formed by thermoplastic molding of a valve core block 2-11 and a sealing block 2-52, and meanwhile, a communication channel on the valve core block 2-11 comprises a main channel 2-12 and a flow dividing channel 2-13; the main channels 2-12 and the spring holes 2-4 are coaxially arranged, the main channels 2-12 can be made into stepped holes according to requirements, the main channels 2-12 can be used for placing and limiting the cylindrical spring 2-2, the flow dividing channels 2-13 are intersected with the main channels 2-12 and are arranged along the axis of the valve core block 2-11, generally 4 flow dividing channels are arranged, and the four flow dividing channels 2-13 are uniformly distributed on the valve core block 2-11 in the circumferential direction in actual arrangement; an included angle of 60 degrees is formed between the flow dividing channel 2-13 and the axis of the valve core block 2-11; through the angle arrangement, the medium can flow conveniently, in addition, the end part of the valve core block is provided with the avoidance ring grooves 2-14, and the influence on the normal circulation of the medium caused by too tight fit of the end wall of the valve core block and the main flow channel is reduced.
In addition, the coil assembly 1 in the invention comprises a shell 12 formed by welding soft magnetic materials and stainless steel, a coil 11 wound on the outer wall of the shell 12 and used for generating a magnetic field, and a cover 13 sleeved outside the coil 11 and used for forming a magnetic field loop; the coil component 1 comprises a shell 12, a coil 11 and a cover 13, wherein the coil 11 is wound on the shell 12, and the cover 13 is sleeved on the shell 12 and fixed by welding; the coil block 1 is partitioned into left and right chambers by the upper valve seat 212.
The double-valve-core electromagnetic valve has the characteristics of compact structure, high response speed, reliable sealing in long-term in-orbit use and the like, and is suitable for propulsion systems of satellites, weapons and the like.
The invention has the following effects based on the disclosure of the structure;
the electromagnetic valve used in satellite system generally requires internal leakage rate less than or equal to 1 x 10 < -6 > Pa.m 3/s, and the leakage rate requirement is realized by using a complicated process method for the electromagnetic valve using a single valve core, and the leakage is easy to generate if the electromagnetic valve has long on-track time.
The invention adopts two valve core assemblies 2, the internal leakage rate is less than or equal to 1 x 10 < -7 > Pa.m 3/s without precise processing, and the leakage rate index can still meet the requirement for a long time on track.
The valve core assembly 2 is reset, a structural type that a cylindrical spring 2-2 and a disc spring are loaded together is adopted, acting force is provided for closing and releasing the valve core assembly 2, the releasing speed is improved by utilizing the characteristic of larger instantaneous loading force of the disc spring, the response time of the electromagnetic valve is shortened, and meanwhile, the disc spring 2-3 plays a role in isolating magnetism when the valve core is opened, so that the response time of the electromagnetic valve is further shortened; the cylindrical spring 2-2 is used for providing continuous reset force and sealing closing force in the valve core releasing process, and the combined loading structure saves the installation space and improves the performance of the electromagnetic valve.
Compared with the traditional cold press molding, the valve core assembly 2 has the advantages that the valve core assembly 2 is formed by injection molding, the bonding force between the sealing material and the valve body is higher, the valve core assembly is not easy to loosen, and the welding is reduced, so that the structure of the valve core assembly 2 is more compact and smaller.
The working principle is as follows:
the invention discloses a double-valve-core electromagnetic valve which is a normally closed electromagnetic valve and is used for controlling the on-off of a medium flow passage of an engine.
Under the condition that the coil 11 is not electrified, the two valve core assemblies 2 (the upper valve core assembly 21 and the lower valve core assembly 22) are in a closed state under the action of respective spring force and medium pressure, the upper valve core assembly 21 is attached to the upper valve seat 212 to form a first seal, and the lower valve core assembly 22 is attached to the lower valve seat 221 to form a second seal.
After the coil 11 is electrified, a magnetic field is generated around the coil, and the valve body, the housing 13, the spring block 211 and the valve core assembly 2 are all magnetized.
Under the action of a magnetic field, magnetic poles are respectively formed between the upper valve core assembly 21 and the spring block 211 and between the lower valve core assembly 22 and the upper valve seat 212 to generate mutual attraction, after the spring force and the medium pressure are overcome, the valve core assembly 2 moves leftwards to the limit position, at the moment, the valve core assembly 2-1 in the upper valve core assembly 21 is separated from the upper valve seat 212, the valve core assembly 2-1 in the lower valve core assembly 22 is separated from the lower valve seat 221, a circular seam flow channel is formed at the separation position, all the flow channels are opened, and the medium flows out of an outlet of the electromagnetic valve.
After the coil 11 is powered off, the magnetic field disappears, and the upper and lower valve core assemblies 22 are reset under the action of the respective springs and the disc springs 2-3 to enable the electromagnetic valve to be sealed again, so that a medium flowing channel is cut off.
It is clear that the specific implementation of the invention is not restricted to the above-described embodiments, but that various insubstantial modifications of the inventive process concept and technical solutions are within the scope of protection of the invention.

Claims (10)

1. A double-spool electromagnetic valve is characterized by comprising a coil assembly and a spool assembly; the coil assembly is sleeved on the valve core assembly; the coil assembly comprises a shell, the inner side of the shell is hollow to form a main flow channel, and a coil is arranged on the outer side of the shell; the valve core assembly comprises an upper valve core assembly and a lower valve core assembly, and the upper valve core assembly and the lower valve core assembly are distributed at two ends of the coil assembly.
2. The dual-spool electromagnetic valve according to claim 1, wherein the upper spool assembly comprises an upper valve seat and a spool piece which are arranged on the main flow channel, the upper valve seat is matched with the spool piece for use, and a first communication hole is arranged on the upper valve seat; the lower valve core assembly comprises a valve core piece arranged in the main flow channel and a lower valve seat arranged at the end part of the coil assembly; the lower valve seat and the valve core piece are oppositely arranged and matched for use; the lower valve seat is provided with a second communicating hole; the valve core piece comprises a valve core block, and a communicating channel is arranged on the valve core block.
3. The dual spool solenoid valve according to claim 2, wherein a sealing portion is provided on a side of the spool piece abutting against the lower valve seat or the upper valve seat.
4. A dual spool solenoid valve according to claim 3 wherein said seal portion includes a connecting groove provided on the spool block, said connecting groove having a seal block disposed therein; the sealing block is arranged in a protruding connection groove.
5. A dual spool solenoid valve according to claim 2 wherein a return mechanism is further connected to the spool member, said return mechanism comprising a cylindrical spring connected to the spool block.
6. A dual spool solenoid valve according to claim 5 wherein the cylindrical spring in the upper spool assembly is connected at one end to the spool block and at the other end to a spring block disposed at the end of the main flow passage; a third communicating hole is formed in the spring block; one end of a cylindrical spring in the lower valve core component is connected with the corresponding valve core block, and the other end of the cylindrical spring is connected with an upper valve seat in the upper valve core piece.
7. The dual spool solenoid valve of any of claims 5-6, wherein the return mechanism further comprises a disc spring disposed in the upper spool assembly or the lower spool assembly; a disc spring for assisting in returning is arranged between the spring block and the valve core block in the upper valve core assembly; and a disc spring for assisting the return is arranged between an upper valve seat in the upper valve core assembly and a valve core block in the lower valve core assembly.
8. The dual spool solenoid valve according to any one of claims 1 to 6 wherein the end of the housing is provided with a communication nipple, the communication nipple is provided with a nipple passage, and the nipple passage is provided with a filter assembly; the filter component comprises a filter screen bracket, and a filter screen is arranged on the filter screen bracket; the filter screen is connected with the filter screen bracket through the supporting net.
9. A dual spool solenoid valve according to claim 8 wherein the filter assembly further comprises a retainer ring that overlies the screen.
10. A dual spool solenoid valve according to claim 8 wherein spacer shims are positioned between the communication nipple and the housing and between the lower seat and the housing.
CN202110268670.1A 2021-03-12 2021-03-12 Double-valve-core electromagnetic valve Pending CN112855960A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110268670.1A CN112855960A (en) 2021-03-12 2021-03-12 Double-valve-core electromagnetic valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110268670.1A CN112855960A (en) 2021-03-12 2021-03-12 Double-valve-core electromagnetic valve

Publications (1)

Publication Number Publication Date
CN112855960A true CN112855960A (en) 2021-05-28

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202110268670.1A Pending CN112855960A (en) 2021-03-12 2021-03-12 Double-valve-core electromagnetic valve

Country Status (1)

Country Link
CN (1) CN112855960A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113757388A (en) * 2021-09-08 2021-12-07 安徽华东光电技术研究所有限公司 Pilot-operated high-pressure self-locking valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113757388A (en) * 2021-09-08 2021-12-07 安徽华东光电技术研究所有限公司 Pilot-operated high-pressure self-locking valve

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