CN103672115B - Sylphon seal solenoid valve - Google Patents
Sylphon seal solenoid valve Download PDFInfo
- Publication number
- CN103672115B CN103672115B CN201310661148.5A CN201310661148A CN103672115B CN 103672115 B CN103672115 B CN 103672115B CN 201310661148 A CN201310661148 A CN 201310661148A CN 103672115 B CN103672115 B CN 103672115B
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- valve
- valve body
- bellows
- housing
- piston
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Classifications
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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
- 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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- 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
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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
- F16K1/42—Valve seats
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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
- F16K1/46—Attachment of sealing rings
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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
- 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
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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
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
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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
- F16K41/00—Spindle sealings
- F16K41/10—Spindle sealings with diaphragm, e.g. shaped as bellows or tube
Abstract
Sylphon seal solenoid valve, comprises valve component, flap assembly, bellows component, bonnet assemblies, electromagnet, support.Valve body has a medium entrance and a media outlet, valve body epicoele is loaded after flap assembly and bellows component assemble, compress with valve gap and seal with sealing gasket, the cavity that formation one is closed between valve body and bellows component, ensures that corrosive medium does not contact with valve rod and armature.Valve gap upper end hole, built with V-type filler, ensures that medium is without leaking outside after bellows damages.The shell that the outside of electromagnet has Austenitic Stainless Steel and permeability alloys to combine, coil block is contained in inside, and compress with concentrating flux plate and gland, shell upper compresses with coil cap and uses seal with O ring, and the lead-in wire of coil is drawn by cable ejector.Support is for connecting electromagnet and valve gap.The present invention can be used for high temperature, is corrosive, the control of poisonous, hazardous medium, can meet the requirement of nuclear chemical industry and nuclear waste disposal system.
Description
Technical field
The present invention relates to solenoid valve, particularly relate to the sylphon seal solenoid valve for nuclear chemical industry and nuclear waste disposal system.
Background technique
As important accessory---the sylphon seal solenoid valve of nuclear chemical industry and nuclear waste disposal system, in the control system in nuclear chemical industry and nuclear waste disposal field, play very crucial effect.In the nuclear waste to content Korrosionsmedium, there is Powdered crystal, it is gaseous state at temperature is higher than 160 DEG C, this Powdered crystal has very strong chemical corrosivity, its technical process control adopts high temperature nitrogen as delivery vehicles, with a normally open solenoid valve as control unit, when after closed electromagnetic valve, temperature decrease after valve, this Powdered crystalline solid is caused to be attached on solenoid valve housing inner tubal wall and armature cylindrical, because it has very strong adhesive quality and corrosivity, and the corrosion resistance of the permeability magnetic materials such as armature is poor, cause armature to be corroded and produce stuck cannot action, be not improved after cleaning, and the rough surface produced after corrosion more easily adsorbs this dusty raw materials, just cannot use after short-term job to making solenoid valve.
The technical problem to be solved in the present invention is, provides one can prevent the Powdered crystal of corrosivity from contacting with permeability magnetic materials such as armature, can bear fluorine dielectric corrosion, resistant to elevated temperatures sylphon seal solenoid valve.
The technological scheme adopted is:
Sylphon seal solenoid valve, comprises valve component, flap assembly, bellows component, bonnet assemblies, filler assembly, electromagnet, support.Described valve component comprises the valve seat having valve body, valve body lumen that flange end medium imports and exports and be threaded.Described valve body has a medium entrance end A, a media outlet end B, and there are the screw be connected with bonnet assemblies and the shoulder installing bellows component in valve body Zhong Kou upper-end surface, and bonnet assemblies adopts bolt 8 and valve component fastening by the screw of valve body Zhong Kou upper-end surface.Described bellows component comprises valve rod, stop pin, supporting disk, bellows.Bellows and valve rod and supporting disk are welded as a whole, supporting disk outer rim is supported on the shoulder of valve body Zhong Kou upper-end surface, there is seal washer between valve body and supporting disk, bellows component is loaded valve body epicoele, the cavity that formation one is closed between valve body and bellows.Stop pin is arranged in the hole in the middle part of valve rod, rotates damage bellows for preventing assembling rear valve rod.Valve rod lower end is processed with the annular keyway installing semi-ring card key, be connected with flap assembly by semi-ring card key, flap assembly is arranged on valve seat, and support is in order to connection valve cap assemblies and electromagnet, pedestal lower end adopts with bonnet assemblies and is threaded, and upper end and electromagnet adopt 4 screws to fix.Described electromagnet comprises housing, cable ejector, upper cover, concentrating flux plate, armature, coil, housing.Housing is by the good Austenitic Stainless Steel inner lining of casing permeability alloys of antiseptic property, coil is placed in housing, armature is installed on coil endoporus, concentrating flux plate is placed on the coil top gland being spun on armature upper end and compresses, upper cover is arranged on housing upper end, and with seal with O ring between housing and upper cover, upper end nut compresses, cable ejector is arranged on housing upper side, for the input of solenoid controlled lead-in wire.There is the armature of tapered end to be arranged in housing endoporus, in housing, have conical end armature seat.Porose on the disk of housing bottom, for fixing with support.Valve rod keeps in touch through endoporus on valve gap and armature lower end surface, and valve rod overcoat Returnning spring, Returnning spring two ends are supported respectively on spring seat and valve gap, ensure that flap is opening state when power-off.Described filler assembly is arranged in the hole of bonnet assemblies upper end, and compresses with Gland.
The valve seat that above-mentioned valve body lumen is threaded, is provided with polytetrafluoroethylsealed sealed circle between its valve body and valve seat.
Above-mentioned flap assembly, comprises piston 30, piston gasket 32, piston pressing plate 33, locking nut 34.The axle of piston there is screw thread, annular deep gouge is arranged at plunger disc bottom, piston gasket is contained in deep gouge, and compress with the piston pressing plate be contained on piston axle, locking nut, with cotter pin through locking nut and piston lower portion axle, prevent from loosening, there is circular counter bore piston upper end, there is the groove of mounting spring back-up ring outside counterbore, fixed by check ring and bellows component.
Above-mentioned bonnet assemblies, comprise valve gap, anti-rotation lining, rotating prevention sleeve endoporus is provided with the axially directed groove of stop pin on valve rod, ensures that valve rod can only move axially, under anti-rotation lining interference fit loading valve gap in stomidium, ensure between anti-rotation lining and valve gap without relatively rotating.
Valve body epicoele is placed on after above-mentioned bellows component and flap assembled, supporting disk outer rim is supported on the shoulder of mouth in valve body, have sealing gasket between valve body and supporting disk, valve gap is pressed on sealing gasket, forms a closed cavity between valve body and bellows 28.
Above-mentioned bellows component and flap assembly adopt semi-ring card key to be connected, and fix with check ring.
Above-mentioned valve rod passes from valve gap and filler center hole, and Gland is pressed on filler upper end, and after preventing bellows from damaging, medium leaks from valve rod.
The housing of above-mentioned piston, valve rod, bellows, supporting disk, coil all uses austenite stainless steel making.
Above-mentioned Sealing is by teflon manufacture.
Above-mentioned valve seat adopts monel metal manufacture.
Major advantage of the present invention:
1, solenoid valve sealing adopts sylphon seal, by corrosive crystal dust shielding in valve body lumen, armature and housing, valve rod and valve gap etc. have the component of relative movement all outside at bellows, avoid attachment and the corrosion of corrosive crystal powder.
2, solenoid valve adopts bellows and V-arrangement tetrafluoro filler double-layer seal, guarantees that solenoid valve leaks outside without any.
3, solenoid valve sealing used adopts poly-four vinyl materials, high temperature resistant, corrosion resistance and good.
4, valve seat adopts the monel metal of corrosion resistance and good, the longer service life of valve.
5, underslung valve flap structure, is more conducive to sealing.
7, the flap mounting type of semi-ring card key formula, easy to maintenance.
8, electromagnetic coil of the present invention adopts heatproof can reach the polyimide enameled wire of 220 DEG C, can improve the resistance to high temperature of product, can improve again the radiation resistance of product.
9, electromagnet housing of the present invention is that Austenitic Stainless Steel and permeability alloys combine, and improves the decay resistance of product.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
Embodiment
Sylphon seal solenoid valve, comprise valve component 1, flap assembly 2, bellows component 3, bonnet assemblies 4, electromagnet 5, V-type tetrafluoro filler 11, spring seat 16, support 15, described valve component 1 is made up of valve body 35, valve seat 7, valve base sealing pad 6, valve body is cast carbon steel, be provided with a medium entrance end A, a media outlet end B, flange end is processed at two ends, and end face is processed into concave surface.There are the screw be connected with bonnet assemblies 4 and the shoulder installing bellows component 3 in valve body 35 Zhong Kou upper-end surface, bonnet assemblies 4 adopts bolt 8 and valve component 1 fastening by the screw of valve body 35 Zhong Kou upper-end surface, valve body 35 lumen is processed with tapped hole, for fixed valve base 7.Described flap assembly 2, comprise piston 30, piston gasket 32, piston pressing plate 33, locking nut 34, the axle of piston 30 lower end there is screw thread, annular deep gouge is arranged at plunger disc bottom, piston gasket 32 is contained in deep gouge, and compress with the piston pressing plate 33 be contained on piston axle, locking nut 34, flap assembly 2 semi-ring card key 31 and check ring are fixed on bellows component 3 valve rod 25 lower end.Described bellows component 3 comprises valve rod 25, stop pin 26, supporting disk 27, bellows 28.Supporting disk 27 outer rim of bellows component 3 is placed on the annular shoulder of flange in valve body, has sealing gasket 29 between supporting disk and valve body, and the boss of bonnet assemblies 4 lower end is pressed on sealing gasket 29, ensures that the medium in valve pocket does not leak outside.Stop pin 26 on valve rod 25 coordinates with the keyway on anti-rotation lining 10, prevent the valve rod when assembling and electromagnetic valve work from rotating and damage bellows, the optical axis of valve rod upper end is through filler assembly 12 hole, and filler assembly 12 Gland 13 compresses, and after preventing bellows from damaging, medium leaks outside.Valve rod upper end is processed with screw thread, Returnning spring 14 loads from valve rod upper end, lower end is supported on the shaft shoulder of valve gap 9 upper end, upper end is supported on spring seat 16, spring seat two nuts are fixed on valve rod, reactive spring force, by bellows component and flap assembly together hanging valve seat 7, ensure that valve is opening state, and valve rod upper end contacts with armature 22 lower end surface.Described electromagnet is made up of housing 17, cable ejector 18, upper cover 19, gland 20, concentrating flux plate 21, armature 22, coil groups 23, housing 24, the disk of housing bottom there is stepped throughhole, for fixed support and electromagnet, shielding sleeve is through coil case 24, coil groups 23, concentrating flux plate 21 center hole, gland adopts with housing upper end and is threaded, gland compresses concentrating flux plate 21, coil housing, coil, concentrating flux plate are tightened together, armature is placed in housing center hole, and lower end surface contacts with valve rod 25 upper-end surface; Coil upper cover 19 is placed on solenoid housing top, and centre adds seal with O ring, and upper end is fastening with an acorn nut, and solenoid housing upper side has cable leading to export, and cable ejector 18 is arranged on cable outlet place, fixes with four screws.Described support 15 is for connecting valve gap and electromagnet, and pedestal upper end is processed with 4 tapped holes, is connected with hole, four, armature 22 lower end with four screws.Described formation sylphon seal solenoid valve.
Working principle of the present invention
This solenoid valve is direct-acting type normally open solenoid valve, adopt corrugated stainless steel tubing as shielding element, the moving element such as armature, valve rod is all in the outside of bellows, consider the principle of Security and reliability, increase by one group of teflon V-type filler in bellows outside, there is corrosive medium and cannot contact with valve rod and armature under the shielding of bellows.Structure is shown in Fig. 1.
Working principle is as follows:
When the solenoid is activated, coil generating electromagnetic power, armature in housing is at the moved downward of electromagnetic force, and promote valve rod overcome spring force, filler frictional force, bellows deformation force, bellows place medium reaction force make closing motion downwards, because electromagnetic attraction is greater than above-mentioned active force sum, flap is final plant closure valve under the thrust of valve rod, during valve closing, leaving certain closed gap between armature and armature seat, ensureing that valve has downward electromagnetic force on flap all the time when closing.When after coil blackout, electromagnetic force disappears, Returnning spring gram
Take medium active force, dynamic iron core deadweight, filler frictional force, bellows deformation force pull the upwards action of valve rod, flap, valve open.
Claims (10)
1. sylphon seal solenoid valve, comprise valve component (1), flap assembly (2), bellows component (3), bonnet assemblies (4), filler assembly (12), electromagnet (5), support (15), it is characterized in that described valve component (1) comprises the valve body (35) having flange end medium and import and export, the valve seat (7) that valve body (35) lumen is threaded, described valve body (35) has medium entrance end A media outlet end B, there are the screw be connected with bonnet assemblies (4) and the shoulder installing bellows component (3) in valve body (35) Zhong Kou upper-end surface, bonnet assemblies (4) adopts bolt (8) and valve component (1) fastening by the screw of valve body (35) Zhong Kou upper-end surface, described bellows component (3) comprises valve rod (25), stop pin (26), supporting disk (27), bellows (28), bellows (28) is welded as a whole with valve rod (25) and supporting disk (27), supporting disk (27) outer rim is supported on the shoulder of valve body (35) Zhong Kou upper-end surface, seal washer (29) is had between valve body and supporting disk, bellows component is loaded valve body epicoele, the cavity that formation one is closed between valve body and bellows, stop pin (26) is arranged in the hole at valve rod (25) middle part, valve rod (25) lower end is processed with the annular keyway installing semi-ring card key (31), be connected with flap assembly (2) by semi-ring card key (31), flap assembly (2) is arranged on valve seat (7), support (15) is in order to connection valve cap assemblies and electromagnet, support (15) lower end adopts with bonnet assemblies (4) and is threaded, upper end and electromagnet (5) adopt four screws to fix, described electromagnet (5) comprises housing (17), cable ejector (18), upper cover (19), concentrating flux plate (21), armature (22), coil (23), housing (24), housing is lined with permeability alloys in (24), coil (23) is placed in housing (24), armature (22) is installed on coil (23) endoporus, concentrating flux plate (21) is placed on coil (23) the top gland (20) being spun on armature upper end and compresses, upper cover (19) is arranged on housing (24) upper end, with seal with O ring between housing (24) and upper cover (19), upper end nut compresses, cable ejector (18) is arranged on housing (24) upper side, for the input of solenoid controlled lead-in wire, the armature of tapered end (22) is had to be arranged in housing (17) endoporus, conical end armature seat is had in housing (17), porose on the disk of housing (17) bottom, for fixing with support (15), valve rod (25) keeps in touch through the upper endoporus of valve gap (9) and armature (22) lower end surface, valve rod (25) overcoat Returnning spring (14), Returnning spring (14) two ends are supported respectively on spring seat (16) and valve gap (9), described filler assembly (12) is arranged in the hole of bonnet assemblies (4) upper end, and compresses with Gland (13).
2. sylphon seal solenoid valve according to claim 1, it is characterized in that being provided with polytetrafluoroethylsealed sealed circle (6) between its valve body (35) and valve seat (7) by the valve seat (7) that described valve body (35) lumen is threaded.
3. sylphon seal solenoid valve according to claim 1, it is characterized in that described flap assembly (2), comprise piston (30), piston gasket (32), piston pressing plate (33), locking nut (34), the axle of piston (30) lower end there is screw thread, annular deep gouge is arranged at plunger disc bottom, piston gasket (32) is contained in deep gouge, and with the piston pressing plate (33) be contained on piston axle, locking nut (34) compresses, with cotter pin through locking nut and piston lower portion axle, there is circular counter bore piston (30) upper end, the groove of mounting spring back-up ring is had outside counterbore, fixed by check ring and bellows component.
4. sylphon seal solenoid valve according to claim 1, it is characterized in that described bonnet assemblies (4), comprise valve gap (9), anti-rotation lining (10), anti-rotation lining (10) endoporus is provided with the axially directed groove of stop pin on valve rod (26), under anti-rotation lining (10) interference fit loading valve gap (9) in stomidium.
5. sylphon seal solenoid valve according to claim 1, it is characterized in that described bellows component (3) and flap assembly (2) are placed on valve body epicoele after assembling, supporting disk (27) outer rim is supported on the shoulder of mouth in valve body (35), sealing gasket (29) is had between valve body (35) and supporting disk (27), valve gap (9) is pressed on sealing gasket (29), forms a closed cavity between valve body (35) and bellows (28).
6. sylphon seal solenoid valve according to claim 1, is characterized in that described bellows component (3) and flap assembly (2) adopt semi-ring card key (31) to be connected, fixes with check ring.
7. sylphon seal solenoid valve according to claim 1, it is characterized in that described valve rod (25) passes from valve gap (9) and filler center hole, Gland (13) is pressed on filler upper end.
8. sylphon seal solenoid valve according to claim 1, is characterized in that the housing (24) of piston (30), valve rod (25), bellows (28), supporting disk (27), coil all uses austenite stainless steel making.
9. sylphon seal solenoid valve according to claim 1, is characterized in that Sealing is by teflon manufacture.
10. sylphon seal solenoid valve according to claim 1, is characterized in that described valve seat (7) adopts monel metal manufacture.
Priority Applications (1)
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CN201310661148.5A CN103672115B (en) | 2013-12-10 | 2013-12-10 | Sylphon seal solenoid valve |
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CN201310661148.5A CN103672115B (en) | 2013-12-10 | 2013-12-10 | Sylphon seal solenoid valve |
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CN103672115A CN103672115A (en) | 2014-03-26 |
CN103672115B true CN103672115B (en) | 2015-09-23 |
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Families Citing this family (11)
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CN104455493A (en) * | 2014-11-28 | 2015-03-25 | 浙江万龙机械有限公司 | Liquid chlorine regulating valve |
CN105673913B (en) * | 2016-03-16 | 2018-06-26 | 鞍山电磁阀有限责任公司 | Nuclear power station turbine driven auxiliary feed-water pump 3 grades of electromagnetic drivers of nuclear safety |
CN105673914A (en) * | 2016-03-16 | 2016-06-15 | 鞍山电磁阀有限责任公司 | Nuclear-security third-level steam solenoid valve for stream-driven auxiliary water-feeding pump of nuclear power station |
CN105840849A (en) * | 2016-04-26 | 2016-08-10 | 邵阳富鑫实业有限公司 | Automatic control valve for molten aluminum pipelining |
CN107489772A (en) * | 2017-09-27 | 2017-12-19 | 无锡正大轴承机械制造股份有限公司 | A kind of sealed electromagnetic valve |
CN108318292B (en) * | 2018-01-29 | 2020-07-28 | 成都思创睿智科技有限公司 | Piston bottle |
CN108083199B (en) * | 2018-02-07 | 2019-04-23 | 西安交通大学 | A kind of multifunction electromagnetic lifting device and method |
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CN110274038B (en) * | 2019-06-17 | 2021-02-19 | 天津大学 | Small-flow electromagnetic regulating valve |
CN113266697A (en) * | 2021-06-29 | 2021-08-17 | 浙江中孚流体机械有限公司 | Bellows solenoid valve convenient to switch |
CN113431674B (en) * | 2021-07-08 | 2022-04-12 | 哈尔滨工程大学 | Air storage intercooler of cylinder-separating free piston generator |
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CN1098431C (en) * | 1997-10-13 | 2003-01-08 | 赵文轩 | leakless safety valve |
JP4203906B2 (en) * | 2004-03-31 | 2009-01-07 | 株式会社デンソー | Solenoid valve and evaporative fuel processing system using the same |
JP2006258135A (en) * | 2005-03-15 | 2006-09-28 | Denso Corp | Solenoid valve |
CN101122341A (en) * | 2006-08-09 | 2008-02-13 | 天津市津南区凯达电子有限公司 | Gas meter electromagnetic valve |
CN102032384B (en) * | 2010-09-10 | 2012-08-29 | 西安航天远征流体控制股份有限公司 | Pneumatic pulse valve capable of continuously and automatically opening and closing |
CN203614872U (en) * | 2013-12-10 | 2014-05-28 | 鞍山电磁阀有限责任公司 | Corrugated pipe sealing solenoid valve |
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