CN106594362A - Pilot type fire-fighting electromagnetic valve - Google Patents
Pilot type fire-fighting electromagnetic valve Download PDFInfo
- Publication number
- CN106594362A CN106594362A CN201611200632.8A CN201611200632A CN106594362A CN 106594362 A CN106594362 A CN 106594362A CN 201611200632 A CN201611200632 A CN 201611200632A CN 106594362 A CN106594362 A CN 106594362A
- Authority
- CN
- China
- Prior art keywords
- iron core
- piston
- dynamic iron
- valve
- electromagnetic 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.)
- Withdrawn
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 59
- 238000000034 method Methods 0.000 claims abstract description 7
- 238000007789 sealing Methods 0.000 claims description 16
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 15
- 229910052742 iron Inorganic materials 0.000 claims description 7
- 210000000481 breast Anatomy 0.000 claims description 3
- 229910000859 α-Fe Inorganic materials 0.000 claims 1
- 239000000463 material Substances 0.000 abstract description 4
- 239000000306 component Substances 0.000 abstract 1
- 239000008358 core component Substances 0.000 abstract 1
- 230000000694 effects Effects 0.000 abstract 1
- 230000001939 inductive effect Effects 0.000 abstract 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 239000003921 oil Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 241001347978 Major minor Species 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910001208 Crucible steel Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000010720 hydraulic oil Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a pilot type fire-fighting electromagnetic valve which comprises an electronic valve controller outer shell. An electromagnetic valve body is arranged below the electronic valve controller outer shell, and a movable iron core piston is arranged in the middle of the interior of the electronic valve controller outer shell. A movable iron core is arranged on the movable iron core piston. A piston lower supporting column is arranged under the movable iron core piston. Inductive coils are arranged on the two sides of the movable iron core piston. According to the pilot type fire-fighting electromagnetic valve, a structure combining the direct stepped mode with the pilot mode is adopted, and the phenomenon that the valve cannot be opened due to pressure difference is avoided. Parts and components, such as a valve deck and main and auxiliary valve elements, in contact with media are plastic products which are made of special materials through a special technique, failures such as rust and jamming caused by materials are completely eradicated, and the effect that the valve can be opened normally even though the valve is not used for years is guaranteed. By the adoption of the special technique, the movable iron core component space is completely isolated from the media, and rusting is prevented.
Description
Technical field
The invention belongs to Solenoid Valve Technology field, and in particular to pilot-operated type electromagnetic valve for fire control.
Background technology
It, with the industrial equipment of Electromagnetic Control, is the automatic foundamental element for controlling fluid that magnetic valve is, belongs to execution
Device, however it is not limited to hydraulic pressure, pneumatic.Direction, flow, speed and other parameters of medium are adjusted in industrial control system.
Magnetic valve can coordinate different circuits to realize expected control, and the precision and flexibility that control can ensure.Electromagnetism
Valve has many kinds, and different magnetic valves play a role in the diverse location of control system, most commonly check valve, safety valve,
Directional control valve, speed-regulating valve etc..There is closed chamber in magnetic valve, in diverse location through hole is provided with, each hole connection is different
Oil pipe, be piston in the middle of chamber, two sides is two blocks of electromagnet, and which side the magnet coil energization valve body in which face will be attracted to,
Different outages are turned on and off by the movement of application valve body, and fuel feed hole is normally opened, hydraulic oil will be entered not
Same oil exit pipe, then promotes the piston of oil cylinder, piston to drive piston rod, piston rod driving mechanical dress again by the pressure of oil
Put.So mechanical movement is just controlled by the current switching of control electromagnet.It is that a kind of direct acting and pilot-operated type combine
Principle, when entrance and outlet do not have pressure reduction, after energization, electromagnetic force directly successively upwards carries the little valve of guide and main valve closure member
Rise, valve is opened.When entrance and outlet reach switch DP, after energization, the little valve of electromagnetic force guide, under main valve on cavity pressure
Rise, upper cavity pressure declines, so as to main valve is pushed open upwards using pressure reduction；During power-off, pilot valve is using spring force or pressure medium
Closure member is promoted, is moved down, make valve closing.
However, the magnetic valve of traditional fire-fighting domain is not used throughout the year, internal valve body structure can get rusty, once there is fire
During calamity, it is impossible to ensure its rapid normally-open operating mode, and be not the structure combined using multiple step format and pilot-operated type.
The content of the invention
It is an object of the invention to provide pilot-operated type electromagnetic valve for fire control, to solve above-mentioned background technology in propose it is traditional
The magnetic valve of fire-fighting domain is not used throughout the year, and internal valve body structure can get rusty, when there is fire, it is impossible to ensure that its is rapid
Normally-open operating mode, and be not the structure problem combined using multiple step format and pilot-operated type.
For achieving the above object, the present invention provides following technical scheme：Pilot-operated type electromagnetic valve for fire control, including electronic valve control
Device shell body, is provided with electromagnetic valve body below the electronic valve controller shell body, and electronic valve controller shell body
Dynamic iron core piston is provided with bosom position, dynamic iron core, and dynamic iron core piston are provided with above the dynamic iron core piston
Lower section be provided with piston lower portion support column, the both sides of the dynamic iron core piston are provided with inductance coil, and dynamic iron core piston
Lower section tower spring is provided with the outside of piston lower portion support column, fixed core, institute are provided with above the dynamic iron core
The lower inside for stating electronic valve controller shell body is provided with sealing piston stop collar, and the inside of electronic valve controller shell body
Both sides near sealing piston stop collar are provided with seal washer, and below the piston lower portion support column sealing is provided with
Head, the interior side of the electromagnetic valve body is provided with water inlet, and opposite side is provided with delivery port, the inductance coil and determines iron
Core is electrically connected with the power supply.
Preferably, the inductance coil is provided with altogether two, and two inductance coils are separately mounted to dynamic iron core piston
Both sides.
Preferably, the seal washer is provided with altogether two, and two seal washers to be separately mounted to sealing piston spacing
The lower section of set.
Preferably, the dynamic iron core piston passes through tower spring elastic connection with electronic valve controller shell body.
Preferably, the electronic valve controller shell body is bolted to connection with water inlet.
Preferably, the piston lower portion support column is bolted to connection with dynamic iron core piston.
Compared with prior art, the invention has the beneficial effects as follows：
（1）In the present invention, the structure combined using direct step-by-step and pilot-operated type prevents the phenomenon that cannot be opened because of pressure reduction.
（2）In the present invention, the parts that the valve valve gap major-minor valve element etc. is contacted with medium adopt special process, special material
Plastic products made by matter, prevent that it causes because of material get rusty, the failure such as stuck, it is ensured that throughout the year not under service condition, still
It is normally-open.
（3）In the present invention, the valve, by dynamic iron core space of components, is completely cut off completely using special process with medium, prevents from getting rusty.
（4）In the present invention, " covered wire " coil breaks through the manufacture craft of conventional coil, and coil is divided into " startup power "
" holding power " two kinds of working conditions, and by the way that " micro contact switch was " to realize the switching between two kinds of working conditions, both
Electromagnetic attraction is increased, its resistance is overcome, coil large power long time service is overcome again, cause the phenomenon burnt, while
Brand-new technological approaches is opened in energy-saving field for magnetic valve.
（5）In the present invention, coil also uses " pure iron " casting pressure on shell and forms.Not only overcome because of high-power adhesive
Produced enormous impact force, and considerably increase coil magnetic field suction.
（6）In the present invention, using valve gap made by special substance, special process, major-minor valve parts, tradition is breached
Cast steel, the category of stainless steel, realize and do not use the requirement for remaining to normal work throughout the year, succeeded in developing " covered wire "
Structure coil, substantially increases the electromagnetic attraction of coil, saves coil cost of manufacture, and opens new way for energy-saving and emission-reduction
Footpath.
Description of the drawings
Fig. 1 is the structural representation of the present invention；
In figure：1- electromagnetic valve bodies, 2- water inlets, 3- seal washers, 4- sealing piston stop collars, 5- tower springs, 6- inductance
Coil, 7- electronic valve controller shell bodies, 8- fixed cores, 9- dynamic iron cores, 10- dynamic iron core pistons, 11- piston lower portion support columns,
12- seal heads, 13- delivery ports.
Specific embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than the embodiment of whole.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Fig. 1 is referred to, the present invention provides a kind of technical scheme：Pilot-operated type electromagnetic valve for fire control, including outside electronic valve controller
Housing（7）, electronic valve controller shell body（7）Lower section be provided with electromagnetic valve body（1）, and electronic valve controller shell body
（7）Bosom position at be provided with dynamic iron core piston（10）, dynamic iron core piston（10）Top be provided with dynamic iron core（9）,
And dynamic iron core piston（10）Lower section be provided with piston lower portion support column（11）, dynamic iron core piston（10）Both sides be provided with electricity
Sense coil（6）, and dynamic iron core piston（10）Lower section near piston lower portion support column（11）Outside be provided with tower spring
（5）, dynamic iron core（9）Top be provided with fixed core（8）, electronic valve controller shell body（7）Lower inside be provided with sealing
Piston limit set（4）, and electronic valve controller shell body（7）Inside near sealing piston stop collar（4）Both sides be respectively provided with
There is seal washer（3）, piston lower portion support column（11）Lower section be provided with seal head（12）, electromagnetic valve body（1）Inside one
Side is provided with water inlet（2）, opposite side is provided with delivery port（13）, inductance coil（6）And fixed core（8）Electrically connect with power supply
Connect.
In order to increase electromagnetic attraction, in the present embodiment, it is preferred that inductance coil（6）Two, and two inductance are provided with altogether
Coil（6）It is separately mounted to dynamic iron core piston（10）Both sides.
For when magnetic valve sealing just, in the present embodiment, it is preferred that seal washer（3）Two, and two are provided with altogether
Individual seal washer（3）It is separately mounted to sealing piston stop collar（4）Lower section.
Dynamic iron core piston for convenience（10）Playback, in the present embodiment, it is preferred that the dynamic iron core piston（10）With electronics
Valve control shell body（7）By tower spring（5）Elastic connection.
In order that the electronic valve controller shell body（7）With water inlet（2）Connection is even closer, excellent in the present embodiment
Choosing, electronic valve controller shell body（7）With water inlet（2）It is bolted to connection.
In order that the piston lower portion support column（11）With dynamic iron core piston（10）Connection is more fixed, in the present embodiment,
Preferably, piston lower portion support column（11）With dynamic iron core piston（10）It is bolted to connection.
Inductance coil in the present invention（6）The valve coil is made using Special enameled wire, " covered wire " coil, breaks through tradition
The manufacture craft of coil, by coil " startup power " and " holding power " two kinds of working conditions are divided into, and by " opening fine motion contact
Close " to realize the switching between two kinds of working conditions.Electromagnetic attraction was so both increased, its resistance had been overcome, line had been overcome again
Loop high-power works long hours, and causes the phenomenon burnt, while brand-new technology way is opened in energy-saving field for magnetic valve
Footpath.
The present invention operation principle and use flow process：After the present invention is installed, respectively by water inlet（2）With delivery port
（13）Fixing pipe in connection, and switch on power, work as inductance coil（6）After energization, inductance coil（6）By fixed core（8）Will
Dynamic iron core can be attracted（9）Overcome tower spring（5）Elastic force move up, dynamic iron core（9）Make dynamic iron core piston（10）Move upwards
It is dynamic, dynamic iron core piston（10）Drive piston lower portion support column（11）Move up, this results in sealing piston stop collar（4）Even
Under the hydraulic pressure of adapter, without piston lower portion support column（11）During support, move up, this results in water inlet（2）With go out
The mouth of a river（13）Left and right connection, reaches the purpose that water can pass through, and works as inductance coil（6）After power-off, electromagnetic attraction moment does not have, tower
Formula spring（5）Make dynamic iron core piston（10）Playback, piston lower portion support column（11）Again sealing piston stop collar is supported（4）, will
The path blocking of water pipe or so, reaches the purpose of throttling.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding can carry out various changes, modification, replacement to these embodiments without departing from the principles and spirit of the present invention
And modification, the scope of the present invention be defined by the appended.
Claims (7)
1. pilot-operated type electromagnetic valve for fire control, including electronic valve controller shell body（7）, it is characterised in that：The electronic valve controller
Shell body（7）Lower section be provided with electromagnetic valve body（1）, and electronic valve controller shell body（7）Bosom position at set
It is equipped with dynamic iron core piston（10）, the dynamic iron core piston（10）Top be provided with dynamic iron core（9）, and dynamic iron core piston（10）'s
Lower section is provided with piston lower portion support column（11）, the dynamic iron core piston（10）Both sides be provided with inductance coil（6）, and it is dynamic
Ferrite core piston（10）Lower section near piston lower portion support column（11）Outside be provided with tower spring（5）, the dynamic iron core（9）
Top be provided with fixed core（8）, the electronic valve controller shell body（7）Lower inside be provided with sealing piston stop collar
（4）, and electronic valve controller shell body（7）Inside near sealing piston stop collar（4）Both sides be provided with seal washer
（3）, the piston lower portion support column（11）Lower section be provided with seal head（12）, the electromagnetic valve body（1）Interior side
It is provided with water inlet（2）, opposite side is provided with delivery port（13）, the inductance coil（6）And fixed core（8）It is electrical with power supply
Connection.
2. pilot-operated type electromagnetic valve for fire control according to claim 1, it is characterised in that：The inductance coil（6）It is provided with altogether
Two, and two inductance coils（6）It is separately mounted to dynamic iron core piston（10）Both sides.
3. pilot-operated type electromagnetic valve for fire control according to claim 1, it is characterised in that：The seal washer（3）It is provided with altogether
Two, and two seal washers（3）It is separately mounted to sealing piston stop collar（4）Lower section.
4. pilot-operated type electromagnetic valve for fire control according to claim 1, it is characterised in that：The dynamic iron core piston（10）With electronics
Valve control shell body（7）By tower spring（5）Elastic connection.
5. pilot-operated type electromagnetic valve for fire control according to claim 1, it is characterised in that：The electronic valve controller shell body
（7）With water inlet（2）It is bolted to connection.
6. pilot-operated type electromagnetic valve for fire control according to claim 1, it is characterised in that：The piston lower portion support column（11）With
Dynamic iron core piston（10）It is bolted to connection.
7. a kind of using method of pilot-operated type electromagnetic valve for fire control as claimed in claim 1, it is characterised in that：Respectively by water inlet
（2）With delivery port（13）Fixing pipe in connection, and switch on power, work as inductance coil（6）After energization, inductance coil（6）Pass through
Fixed core（8）Dynamic iron core will be attracted（9）Overcome tower spring（5）Elastic force move up, dynamic iron core（9）Make dynamic iron core piston
（10）Move up, dynamic iron core piston（10）Drive piston lower portion support column（11）Move up, this results in sealing piston limit
Position set（4）Under the hydraulic pressure of connecting tube, without piston lower portion support column（11）During support, move up, this result in into
The mouth of a river（2）With delivery port（13）Left and right connection, reaches the purpose that water can pass through, and works as inductance coil（6）After power-off, electromagnetic attraction
Moment does not have, tower spring（5）Make dynamic iron core piston（10）Playback, piston lower portion support column（11）Again sealing piston limit is supported
Position set（4）, the path of water pipe or so is blocked, reach the purpose of throttling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611200632.8A CN106594362A (en) | 2016-12-22 | 2016-12-22 | Pilot type fire-fighting electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611200632.8A CN106594362A (en) | 2016-12-22 | 2016-12-22 | Pilot type fire-fighting electromagnetic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106594362A true CN106594362A (en) | 2017-04-26 |
Family
ID=58602901
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611200632.8A Withdrawn CN106594362A (en) | 2016-12-22 | 2016-12-22 | Pilot type fire-fighting electromagnetic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106594362A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111734876A (en) * | 2020-08-19 | 2020-10-02 | 广东三方利精密技术有限公司 | Pilot-operated high-pressure electromagnetic valve |
| CN112303317A (en) * | 2019-07-29 | 2021-02-02 | 浙江三花制冷集团有限公司 | Pilot-operated type electromagnetic valve |
| CN112648403A (en) * | 2020-12-24 | 2021-04-13 | 何飞 | Pilot-operated electromagnetic ball valve |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06235478A (en) * | 1993-02-08 | 1994-08-23 | Ckd Corp | Pilot type solenoid valve |
| JP2008115978A (en) * | 2006-11-07 | 2008-05-22 | Yoshitake Inc | Pilot type solenoid valve |
| KR20110003767U (en) * | 2011-03-09 | 2011-04-15 | 곽현오 | valve |
| CN103185164A (en) * | 2011-12-31 | 2013-07-03 | 丹佛斯（天津）有限公司 | Electromagnetic valve |
| CN103791101A (en) * | 2012-11-02 | 2014-05-14 | 宁波开灵气动元件制造有限公司 | Pilot type anti-corrosion electromagnetic valve |
| CN104455650A (en) * | 2014-09-30 | 2015-03-25 | 宁波星箭航天机械有限公司 | Pilot electromagnetic valve |
| CN206299874U (en) * | 2016-12-22 | 2017-07-04 | 上海巨良电磁阀制造有限公司 | Pilot-operated type electromagnetic valve for fire control |
-
2016
- 2016-12-22 CN CN201611200632.8A patent/CN106594362A/en not_active Withdrawn
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06235478A (en) * | 1993-02-08 | 1994-08-23 | Ckd Corp | Pilot type solenoid valve |
| JP2008115978A (en) * | 2006-11-07 | 2008-05-22 | Yoshitake Inc | Pilot type solenoid valve |
| KR20110003767U (en) * | 2011-03-09 | 2011-04-15 | 곽현오 | valve |
| CN103185164A (en) * | 2011-12-31 | 2013-07-03 | 丹佛斯（天津）有限公司 | Electromagnetic valve |
| CN103791101A (en) * | 2012-11-02 | 2014-05-14 | 宁波开灵气动元件制造有限公司 | Pilot type anti-corrosion electromagnetic valve |
| CN104455650A (en) * | 2014-09-30 | 2015-03-25 | 宁波星箭航天机械有限公司 | Pilot electromagnetic valve |
| CN206299874U (en) * | 2016-12-22 | 2017-07-04 | 上海巨良电磁阀制造有限公司 | Pilot-operated type electromagnetic valve for fire control |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303317A (en) * | 2019-07-29 | 2021-02-02 | 浙江三花制冷集团有限公司 | Pilot-operated type electromagnetic valve |
| CN111734876A (en) * | 2020-08-19 | 2020-10-02 | 广东三方利精密技术有限公司 | Pilot-operated high-pressure electromagnetic valve |
| CN111734876B (en) * | 2020-08-19 | 2020-12-22 | 广东三方利精密技术有限公司 | Pilot-operated high-pressure electromagnetic valve |
| CN112648403A (en) * | 2020-12-24 | 2021-04-13 | 何飞 | Pilot-operated electromagnetic ball valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170426 |
|
| WW01 | Invention patent application withdrawn after publication |