CN101839362A - Normally closed semiautomatic gas emergency cut-off magnetic valve - Google Patents
Normally closed semiautomatic gas emergency cut-off magnetic valve Download PDFInfo
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- CN101839362A CN101839362A CN 201010202079 CN201010202079A CN101839362A CN 101839362 A CN101839362 A CN 101839362A CN 201010202079 CN201010202079 CN 201010202079 CN 201010202079 A CN201010202079 A CN 201010202079A CN 101839362 A CN101839362 A CN 101839362A
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Abstract
The invention discloses a normally closed semiautomatic gas emergency cut-off magnetic valve comprising a magnetic coil assembly, a valve cover assembly, a valve body and an open valve handle assembly, wherein the magnetic coil assembly and the valve cover assembly are mutually blocked and can be disassembled; the valve cover assembly is in threaded connection and fixed with a gas inlet cavity of the valve body, the gas outlet cavity of the valve body is provided with the open valve handle assembly, the open valve handle assembly is fixedly connected with a check ring, the check ring is in threaded connection with a mandrel, a flat seal film is sleeved on a lower lug boss of the check ring, and a spring is sleeved on the excircle of the mandrel; a circuit board and a coil frame are arranged in the magnetic coil assembly, a charging capacitor is arranged on the circuit board, and a coil is coiled on the coil frame; a permanent magnet and a built-in iron core are arranged in the valve cover assembly; when the magnetic valve is energized, the capacitor is charged; when the magnetic valve is deenergized, the capacitor releases electric energy to lead the coil to work in order to generate an electromagnetic field which has opposite polarity with a permanent magnetic field, and the magnetic force of the permanent magnetic field is weakened to lead the spring to push the mandrel and the check ring to move in order to close the valve. The normally closed semiautomatic gas emergency cut-off magnetic valve is easier to replace the magnetic coil for being separating from the permanent magnet, has low power consumption, can be automatically closed and manually opened only when deenergized, can automatically recover when energized, and improves the safety.
Description
Technical field
The present invention relates to a kind of emergency cut-off magnetic valve that is used for the interlock of town gas pipe and fuel gas alarm, particularly a kind of low power consumption, SELV (SELV) continued power, outage automatic closing and normally closed semiautomatic gas emergency cut-off magnetic valve that can only be manually opened.
Background technique
The semi-automatic normally closed solenoid valve that prior art is called, when manually driving valve, during with opening the valve Handleset and move on to the enable possition in the valve, spring force is pinned in the magnetic field adhesive that utilizes the electromagnetic coil energising to produce, and makes valve be held open state; Utilize magnetic field, outage back to disappear rapidly, retracting spring power is closed valve automatically.Manually driving valve also has a kind of mode in addition, and promptly enforced opening is when coil is not powered, and opens by force with the armstrong's patent device, and this can cause valve control disabler, even coil electricity can not recover automatically.This emergency cut-off magnetic valve exists following lacking to flatter:
1, the electromagnetic coil power consumption is big: if use SELV (SELV), as powering below the DC24V, then the power supply capacity of existing fuel gas alarm can't satisfy the supporting requirement of interlock, so coil power supply often adopts civil power, and this may cause the Security of product and application to reduce;
2, the coil intensification is high, and usually greater than 100 ℃: because the applying working condition of gas emergency cut-off valve is to be in opening state for a long time, this can make electromagnetic coil be in the condition of high temperature for a long time, has directly influenced the life-span of coil;
3, if adopt the enforced opening mode, the untimely manual reversion of sending a telegram here, then the automatic closing function of valve still is in failure state, and this is fatal scarce flattering.
The semi-automatic normally open solenoid valve that prior art is called; when manually driving valve; during with opening the valve Handleset and move on to the enable possition in the valve; utilize the mechanical latch structure or utilize permanent magnetism power to pin spring force; make valve when not powering, protect opening state; utilize instantaneous electric flux pulse mechanical lock to be opened or permanent magnet circuit is disconnected, retracting spring power is closed valve automatically, and this emergency cut-off magnetic valve exists following lacking to flatter:
1, no power failure automatic closing function: close the external control that places one's entire reliance upon of valve function, this is fatal scarce flattering, because the power failure automatic closing function is international relevant criterion and the Chinese combustion gas design code Compulsory Feature to Emergeny Cutoff Valves;
2, structure exist to lack and to flatter: as the extraction location of the manual operating device air inlet chamber at valve body, Safety performance is low; Electromagnetic coil is difficult for changing; Impurity in mouthful easy collection conduit causes the pass defective valve, or fits badly; After removing valve body outdoor non-metal parts, can produce and leak, security of valve body is not enough.
Summary of the invention
Technical problem to be solved by this invention is that a kind of above-mentioned all scarce normally closed semiautomatic gas emergency cut-off magnetic valves of flattering that overcome on function and structure will be provided, make function and structure safety and reliability, realized low power consumption, and the long-term powered operation of the SELV (SELV) that allows fuel gas alarm output, electromagnetic coil does not generate heat and the long lifetime, outage automatic closing and can only be manually opened, the incoming call back is closed valve control function and is recovered automatically, electromagnetic circuit and permanent magnet circuit can safe separating can reliably make up again, electromagnetic coil assembly adopts whole plastic packaging structure and can safety dismantle and change under the situation that does not influence sealing, satisfy and water the envelope explosion-proof criteria, security level reaches more than the IP54, manual operating device is drawn from the valve body chamber of giving vent to anger, permanent magnet circuit adhesive face can be prevented impurity and dirt.
In order to solve above technical problem, the invention provides a kind of normally closed semiautomatic gas emergency cut-off magnetic valve, this solenoid valve comprises electromagnetic coil assembly, bonnet assembly, valve body and opens the valve Handleset that valve body contains the bottom flange assembly; Described electromagnetic coil assembly and bonnet assembly are to engage mutually, and the two can be dismantled each other; The air inlet cavity seal of bonnet assembly and valve body is fastenedly connected, the chamber of giving vent to anger of valve body is equipped with out the valve Handleset, pull bar one end of opening the valve Handleset is drawn with handle from the cavity seal of giving vent to anger of valve body and is connected, the other end firmly is connected with flap, flap and mandrel are spirally connected, and are with the plain seal film on the lower convex platform of flap, and the mandrel cylindrical is with spring, the bonnet assembly has the coupling limit structure of spring and mandrel, and the other end has the spring limit structure on the flap; Be provided with circuit board assemblies and coil rack in the described electromagnetic coil assembly, capacitance group and charge-discharge control circuit assembly are arranged on the circuit board assemblies, be wound with coil on the coil rack, coil is connected with outgoing cable; Be provided with permanent magnet and built-in iron core in the described bonnet assembly; When manual mobile mandrel makes its end face reliably contact with built-in iron core end face, the permanent magnet circuit conducting, the permanent magnetism power of generation firmly holds the mandrel end face, and reliably pins spring force valve is held open; When valve is in opening state, to the coil assemblies of solenoid valves continued power, capacitance group is full of fast by outgoing cable; When solenoid valve cuts off the power supply, the capacitance group that is full of electricity discharges electric energy automatically, coil is produced and the opposite polarity electromagnetic force of permanent magnetism power, utilize this electromagnetic force to disconnect permanent magnet circuit, retracting spring power, it is spacing mobile that spring force promotes mandrel, and the plain seal film that the coupled flap of mandrel drive moves on the flap is pressed on ending on the mouth of solenoid valve, realizes the pass valve.
Described electromagnetic coil assembly is a whole plastic packaging structure; circuit board assemblies is done the protectiveness encapsulation; place and be fixed in the element protection box of a structure matching and with closure; or adopt the electron pouring sealant embedding to water the envelope protection; the circuit board assemblies of packaging protection is connected with the electromagnetic coil skeleton that has outgoing cable and contact pin again; Placement adopts welding or crimping or bonding; this assembly parts is positioned in the special plastic packaging housing mould; adopt the Shooting Technique moulding; produce the electromagnetic coil assembly of whole plastic packaging structure; the outgoing cable of electromagnetic coil assembly and external control device connect as fuel gas alarm.
Described circuit board assemblies is provided with relay, and its normally-closed contact is connected in the capacitance group discharge loop, during energising capacitance group is carried out current-limiting charge; Contact pin on the coil rack is welded on the circuit board, and coil is communicated with circuit board assemblies, and the outgoing cable of circuit board assemblies and external control device connect as fuel gas alarm.
Described electromagnetic coil assembly engages the place with the bonnet assembly and is provided with the O RunddichtringO.
In the described bonnet assembly permanent magnet assembly is housed, this permanent magnet assembly is permanent magnet to be packed into form in the lower convex platform of T sections core of structure matching.
A bonnet seal closure is arranged at described bonnet assembly top, is tightly connected with the bonnet assembly, and permanent magnet assembly is sealed in the bonnet assembly, and Placement can adopt the O RunddichtringO to be threaded, or sealed-for-life connects.The place of being spirally connected of described bonnet assembly and valve body is provided with a plurality of O RunddichtringOs.The structure matching of the corresponding assembled portion of electromagnetic coil assembly of bonnet assembly external structure size and whole plastic packaging can be formed the structure that satisfies electromagnetism and permanent magnetism double loop performance.
One dustproof cushion rubber is housed between the inner face of described bonnet assembly and the mandrel, and dustproof cushion rubber flange place is pressed on the inner face of bonnet assembly, and another side hugs on cylindric mandrel.
The described the other end of opening the valve Handleset is connected with a red handle, and red handle is covered with dust cover, adopts screw thread or buckle mode to connect.Also adopt the dustproof and waterproof structure simultaneously, as the O RunddichtringO; Other is provided with and locks or the structure of lead sealing, prevents that the unauthorized person from manually driving valve, improves Security.
Described opening is provided with seal ring and seal ring pressure ring between valve Handleset and the valve body.
Described seal ring and seal ring pressure ring are that flange turriform or flange finger-type or flange are corrugated.
Superior effect of the present invention is:
1) solenoid valve of the present invention is in the requirement of better satisfying the town gas pipe Emergeny Cutoff Valves aspect function and the Security, realize low power consumption, allow the SELV of fuel gas alarm output (as DC9～24V) long-term powered operation, electromagnetic coil do not generate heat and the long lifetime, the power consumption of holding circuit board component proper functioning is little, can be not more than 1W;
2) solenoid valve of the present invention outage automatic closing and can only be manually opened, incoming call late gate control function is recovered automatically;
3) innovative point of the present invention is that electromagnetic coil assembly is whole plastic packaging structural member, with electromagnetic coil and capacitor charging/discharging controling circuit assembly plastic packaging is one, become modular construction, can improve greatly and produce efficiency of assembling and the working life of product in rugged environment, and satisfy water the envelope explosion-proof criteria, security level reaches more than the IP54.
4) innovative point of the present invention is the structure of bonnet assembly, bonnet adopts the full-metallic overall structure, pack into behind the permanent magnet assembly, the bonnet seal closure of Structural Hardware is covered and reliable sealing by O type circle, form the bonnet assembly, its external structure size and electromagnetic coil assembly coupling, form effective electromagnetism and permanent magnetism double loop structure, and magnetic field range is limited in and can not acts on valve body on mouth, the bonnet assembly adopts seizing type quick release structure with being connected of electromagnetic coil assembly, and dismounting does not influence the sealing of valve body, can guarantee the safety dismounting; The matching structure of bonnet assembly of the present invention and electromagnetic coil assembly had both guaranteed the interactional performance of electromagnetism and permanent magnetism double loop, had guaranteed that again electromagnetic coil assembly can dismantle and change safely and fast.
5) the valve handle device of opening of the present invention is drawn from the cavity seal of giving vent to anger of valve body, has reduced the possible leakage point of air inlet chamber, has improved valve Security in off position; Permanent magnet circuit adhesive face there is not influence.
6) protective roof structure of opening the valve handle device of the present invention can dustproof and waterproof (as the O RunddichtringO), can lock again or lead sealing, prevents that the unauthorized personnel from manually driving valve.
7) a dustproof cushion rubber is housed between bonnet assembly inner face of the present invention and the mandrel, can prevents that granule foreign or pollutant from entering (as water or oil smoke), improved the reliability of permanent magnet circuit adhesive face greatly.
Description of drawings
Sectional view when Fig. 1 works for valve opening solenoid valve of the present invention;
Sectional view when Fig. 2 closes valve for solenoid valve of the present invention;
Fig. 3 is the exploded view of electromagnetic coil assembly of the present invention;
The number in the figure explanation
The 1-electromagnetic coil assembly; 2-subassembly wrapper sealing cover;
The 3-circuit breaker; The 4-capacitance group;
The 5-contact pin; 6-element protection box;
The 7-circuit board assemblies; 8-bonnet seal closure;
9,15,16,27-O RunddichtringO; The 10-iron core;
The 11-permanent magnet; The 12-coil rack;
The 13-bonnet; The 14-screw;
17-plain seal film; The 18-valve body;
19-handle dust cover; The 20-handle;
21-seal ring pressure ring; The 22-seal ring;
23-opens the valve Handleset; The 24-cotter pin;
The 25-flap; The 26-spring;
The 28-mandrel; The 29-screw;
The 30-outgoing cable; 31-protects coil;
33-bonnet assembly.
Embodiment
Below in conjunction with accompanying drawing structure of the present invention is further described.
As depicted in figs. 1 and 2, the invention provides a kind of normally closed semiautomatic gas emergency cut-off magnetic valve, this solenoid valve comprises electromagnetic coil assembly 1, bonnet assembly 33 (in the figure frame of broken lines), valve body 18 and opens the valve Handleset that valve body 18 contains the bottom flange assembly; Described electromagnetic coil assembly 1 and valve gap assembly 33 are to engage mutually, and the two can be dismantled each other, and the chucking back is fixing with lock screw 14; Bonnet assembly 33 is fastenedly connected with the air inlet cavity seal of valve body 18, as using O RunddichtringO or the crimping of sealing gasket screw threads for fastening; The chamber of giving vent to anger of valve body 18 is equipped with out valve Handleset 23, pull bar one end of opening valve Handleset 23 is drawn with handle from the cavity seal of giving vent to anger of valve body 18 and is connected, the other end firmly is connected with flap 25, flap 25 is spirally connected with mandrel 28, be with plain seal film 17 on the lower convex platform of flap 25, mandrel 28 cylindricals are with spring 26, and bonnet assembly 33 has the coupling limit structure of spring 26 and mandrel 28, and the other end has the spring limit structure on the flap 25; Be provided with circuit board assemblies 7 and coil rack 12 in the described electromagnetic coil assembly 1, capacitance group 4 and charge-discharge control circuit assembly are arranged on the circuit board assemblies 7, be wound with coil on the coil rack 12, coil is connected with outgoing cable 30; Be provided with permanent magnet 11 and built-in iron core 10 in the described bonnet assembly 33; When manual mobile mandrel 28 makes its end face reliably contact with built-in iron core 10 end faces, the permanent magnet circuit conducting, the permanent magnetism power of generation firmly holds mandrel 28 end faces, and reliably pins spring force valve is held open; When valve is in opening state, to coil assemblies of solenoid valves 1 continued power, capacitance group 4 is full of fast by outgoing cable 30; When solenoid valve cuts off the power supply, the capacitance group 4 that is full of electricity discharges electric energy automatically, coil is produced and the opposite polarity electromagnetic force of permanent magnetism power, utilize this electromagnetic force to disconnect permanent magnet circuit, retracting spring power, spring force promotes mandrel 28 spacing moving, and the plain seal film 17 that the coupled flap 25 of mandrel 28 drives moves on the flap 25 is pressed on ending on the mouth of solenoid valve, realizes closing valve.
Described electromagnetic coil assembly 1 is a whole plastic packaging structure; be that circuit board assemblies 7 is done the protectiveness encapsulation; place and be fixed in the element protection box of a structure matching and with closure; or adopt the electron pouring sealant embedding to water the envelope protection; the circuit board assemblies 7 of packaging protection is connected with the electromagnetic coil skeleton 12 that has outgoing cable 30 and contact pin 5 again; Placement adopts welding or crimping or bonding; this assembly parts is positioned in the special plastic packaging housing mould; adopt the Shooting Technique moulding; produce the electromagnetic coil assembly of whole plastic packaging structure; the outgoing cable of electromagnetic coil assembly and external control device connect as fuel gas alarm.
As shown in Figure 3; circuit board 7 assemblies are positioned in the element protection box 6; successively circuit board assemblies 7, protection box 6 bottom surfaces and coil rack 12 threes are tightened up connection with screw 29; element protection box 6 a tops chimeric subassembly wrapper sealing cover 2 airtight being positioned in the plastic packaging housing mould; adopt the Shooting Technique moulding, produce the electromagnetic coil assembly of whole plastic packaging structure.
Described circuit board assemblies 7 is provided with relay 3, and its normally-closed contact is connected in the capacitance group discharge loop, during energising capacitance group 4 is carried out current-limiting charge; Contact pin 5 on the coil rack 12 is welded on the circuit board, and coil is communicated with circuit board assemblies 7, and the outgoing cable 30 and the external control device of circuit board assemblies 7 connect as fuel gas alarm.
Described electromagnetic coil assembly 1 engages the place with bonnet assembly 33 and is provided with O RunddichtringO 27.
In the described bonnet assembly 33 permanent magnet assembly is housed, this permanent magnet assembly is permanent magnet 11 to be packed into form in the lower convex platform of T sections core 10 of structure matching.
A bonnet seal closure 8 is arranged at described bonnet assembly 33 tops, is tightly connected with bonnet assembly 33, and permanent magnet assembly is sealed in 33 of the bonnet groups, and Placement can adopt the O RunddichtringO to be threaded, or sealed-for-life connects.Described bonnet assembly 33 is provided with a plurality of O RunddichtringOs 15,16 with the place of being spirally connected of valve body 18.The structure matching of the electromagnetic coil assembly 1 corresponding assembled portion of bonnet assembly 33 external structure sizes and whole plastic packaging can be formed the structure that satisfies electromagnetism and permanent magnetism double loop performance.
One dustproof cushion rubber is housed between the inner face of described bonnet assembly 33 and the mandrel 28, and dustproof cushion rubber flange place is pressed on the inner face of bonnet assembly 33, and another side hugs on cylindric mandrel 28.
The described the other end of opening valve Handleset 23 is connected with a red handle 20, and red handle 20 is covered with dust cover 19, adopts screw thread or buckle mode to connect.Also adopt the dustproof and waterproof structure simultaneously, as the O RunddichtringO; Other is provided with and locks or the structure of lead sealing, prevents that the unauthorized person from manually driving valve, improves Security.
Described opening is provided with seal ring 22 and seal ring pressure ring 21 between valve Handleset 23 and the valve body 18.
Described seal ring 22 and seal ring pressure ring 21 are that flange turriform or flange finger-type or flange are corrugated.
Claims (10)
1. normally closed semiautomatic gas emergency cut-off magnetic valve is characterized in that:
This solenoid valve comprises electromagnetic coil assembly, bonnet assembly, valve body and opens the valve Handleset, and described electromagnetic coil assembly and bonnet assembly are to engage mutually, and the two can be dismantled each other; The air inlet cavity seal of bonnet assembly and valve body is fastenedly connected, and the chamber of giving vent to anger of valve body is equipped with out the valve Handleset, opens the valve Handleset and tightens up with flap and be connected, and flap and mandrel are spirally connected, and are with the plain seal film on the lower convex platform of flap, and the mandrel cylindrical is with spring; Be provided with circuit board assemblies and coil rack in the described electromagnetic coil assembly, capacitance group is arranged on the circuit board assemblies, be wound with coil on the coil rack; Be provided with permanent magnet and built-in iron core in the described bonnet assembly; During the solenoid valve energising, capacitance group is charged; When solenoid valve cut off the power supply, capacitance group discharged electric energy, and coil is produced and the opposite polarity electromagnetic field of permanent magnetic field, disconnected permanent magnet circuit, made spring promotion mandrel, flap move throttle down.
2. normally closed semiautomatic gas emergency cut-off magnetic valve according to claim 1 is characterized in that:
Described electromagnetic coil assembly is a whole plastic packaging structure; circuit board assemblies is done the protectiveness encapsulation; place and be fixed in the element protection box of a structure matching and with closure; or adopt the electron pouring sealant embedding to water the envelope protection; the circuit board assemblies of packaging protection is connected with the electromagnetic coil skeleton that has outgoing cable and contact pin again; this assembly parts is positioned in the special plastic packaging housing mould; adopt the Shooting Technique moulding; produce the electromagnetic coil assembly of whole plastic packaging structure, the outgoing cable of electromagnetic coil assembly is connected with the external control device.
3. normally closed semiautomatic gas emergency cut-off magnetic valve according to claim 1 and 2 is characterized in that:
Described circuit board assemblies is provided with relay, and its normally-closed contact is connected in the capacitance group discharge loop, during energising capacitance group is carried out current-limiting charge; Contact pin on the coil rack is welded on the circuit board, and coil is communicated with circuit board assemblies, and the outgoing cable of circuit board assemblies is connected with the external control device.
4. normally closed semiautomatic gas emergency cut-off magnetic valve according to claim 1 is characterized in that:
Described electromagnetic coil assembly engages the place with the bonnet assembly and is provided with the O RunddichtringO.
5. normally closed semiautomatic gas emergency cut-off magnetic valve according to claim 1 is characterized in that:
In the bonnet assembly permanent magnet assembly is housed, this permanent magnet assembly is permanent magnet to be packed into form in the lower convex platform of T sections core of structure matching; One bonnet seal closure and the sealing of bonnet assembly are fastenedly connected, and are provided with the O RunddichtringO between bonnet seal closure and the iron core.
6. normally closed semiautomatic gas emergency cut-off magnetic valve according to claim 1 or 5 is characterized in that:
The place of being spirally connected of described bonnet assembly and valve body is provided with a plurality of O RunddichtringOs.
7. normally closed semiautomatic gas emergency cut-off magnetic valve according to claim 1 or 5 is characterized in that:
One dustproof cushion rubber is housed, the turriform that this dustproof cushion rubber is a flange, fingerstall shape or corrugated between described bonnet assembly inner face and the mandrel.
8. normally closed semiautomatic gas emergency cut-off magnetic valve according to claim 1 is characterized in that:
The described the other end of opening the valve Handleset is connected with a red handle, and red handle is covered with dust cover.
9. according to claim 1 or 8 described normally closed semiautomatic gas emergency cut-off magnetic valves, it is characterized in that:
Described opening is provided with seal ring and seal ring pressure ring between valve Handleset and the valve body.
10. normally closed semiautomatic gas emergency cut-off magnetic valve according to claim 9 is characterized in that:
Described seal ring and seal ring pressure ring are that flange turriform or flange finger-type or flange are corrugated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102020798A CN101839362B (en) | 2010-06-18 | 2010-06-18 | Normally closed semiautomatic gas emergency cut-off magnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102020798A CN101839362B (en) | 2010-06-18 | 2010-06-18 | Normally closed semiautomatic gas emergency cut-off magnetic valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101839362A true CN101839362A (en) | 2010-09-22 |
| CN101839362B CN101839362B (en) | 2011-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102020798A Active CN101839362B (en) | 2010-06-18 | 2010-06-18 | Normally closed semiautomatic gas emergency cut-off magnetic valve |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359646A (en) * | 2011-09-07 | 2012-02-22 | 上海埃科燃气测控设备有限公司 | Switch device for driving and locking guide type electromagnetic gas quick action emergency valve |
| CN103775717A (en) * | 2012-10-22 | 2014-05-07 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
| CN107420552A (en) * | 2017-05-02 | 2017-12-01 | 华北电力大学 | A kind of passive valve |
| CN107620824A (en) * | 2016-07-14 | 2018-01-23 | 浙江三花汽车零部件有限公司 | Electric expansion valve |
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| CN1113559A (en) * | 1995-02-28 | 1995-12-20 | 朱殿臣 | Electromagnetic valve opened by external force and closed by pulse |
| EP0942214A1 (en) * | 1996-12-01 | 1999-09-15 | FUJIKIN Inc. | Fluid control valve and fluid supply/exhaust system |
| CN2449030Y (en) * | 2000-09-29 | 2001-09-19 | 李恩涛 | Pulse electromagnetic valve |
| CN101476632A (en) * | 2008-01-03 | 2009-07-08 | 富良 | Reinforcement type electromagnetic safety valve |
| CN201696719U (en) * | 2010-06-18 | 2011-01-05 | 欧好光电控制技术（上海）有限公司 | Normally closed type semi-automatic gas emergency cut-off magnetic valve |
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| US5029807A (en) * | 1988-04-30 | 1991-07-09 | Messerschmitt-Boelkow-Blohm Gmbh | Solenoid valve |
| CN1113559A (en) * | 1995-02-28 | 1995-12-20 | 朱殿臣 | Electromagnetic valve opened by external force and closed by pulse |
| EP0942214A1 (en) * | 1996-12-01 | 1999-09-15 | FUJIKIN Inc. | Fluid control valve and fluid supply/exhaust system |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102359646A (en) * | 2011-09-07 | 2012-02-22 | 上海埃科燃气测控设备有限公司 | Switch device for driving and locking guide type electromagnetic gas quick action emergency valve |
| CN102359646B (en) * | 2011-09-07 | 2013-08-21 | 上海埃科燃气测控设备有限公司 | Switch device for driving and locking guide type electromagnetic gas quick action emergency valve |
| CN103775717A (en) * | 2012-10-22 | 2014-05-07 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
| CN103775717B (en) * | 2012-10-22 | 2017-08-29 | 艾默生环境优化技术(苏州)有限公司 | Electronic expansion valve |
| CN107620824A (en) * | 2016-07-14 | 2018-01-23 | 浙江三花汽车零部件有限公司 | Electric expansion valve |
| CN107620824B (en) * | 2016-07-14 | 2020-04-03 | 浙江三花汽车零部件有限公司 | Electronic expansion valve |
| CN111188933A (en) * | 2016-07-14 | 2020-05-22 | 浙江三花汽车零部件有限公司 | Electronic expansion valve |
| CN107420552A (en) * | 2017-05-02 | 2017-12-01 | 华北电力大学 | A kind of passive valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101839362B (en) | 2011-06-15 |
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