CN111271477A - Electromagnetic stop safety valve - Google Patents
Electromagnetic stop safety valve Download PDFInfo
- Publication number
- CN111271477A CN111271477A CN202010109732.XA CN202010109732A CN111271477A CN 111271477 A CN111271477 A CN 111271477A CN 202010109732 A CN202010109732 A CN 202010109732A CN 111271477 A CN111271477 A CN 111271477A
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- CN
- China
- Prior art keywords
- hole
- valve
- sleeve
- spring
- pilot 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.)
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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
- 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
-
- 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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
- F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
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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
- 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 an electromagnetic cut-off safety valve which comprises a valve sleeve, wherein a valve hole is formed in the valve sleeve, a through hole is formed in the valve sleeve at the bottom of the valve hole, the lower end of the through hole is a P port, a T port is formed in the side surface of the valve sleeve, a valve core is connected in the valve hole in a sliding mode, and a magnetic sleeve is fixedly installed at the upper end of the valve hole; a slide hole is arranged in the magnetic conduction sleeve, a threaded sleeve is fixedly arranged at the upper end of the magnetic conduction sleeve, and a coil is arranged on the outer circumferential side surface of the magnetic conduction sleeve; a plug is fixedly arranged in the screw sleeve, a moving iron is connected in the sliding hole in a sliding manner, and a pilot valve rod which penetrates through the moving iron and the magnetic sleeve and extends into the valve hole is connected in the plug in a sliding manner; a convex shoulder is arranged on the pilot valve rod; a first spring is arranged in the sliding hole; a first damping hole is formed in the side face of the valve core, and a second damping hole is formed in the lower end of the valve core; the lower end of the pilot valve rod is provided with a convex tip; the electromagnetic stop safety valve can not only realize the electromagnetic stop function, but also realize the safety valve function.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to an electromagnetic stop safety valve.
Background
The electromagnetic cut-off valve and the safety valve are two valves commonly used in industry and pipelines, the electromagnetic cut-off valve controls the on-off of two flow passages through the electrification of a coil or not, and the safety valve is used for limiting the highest service pressure in the pipeline to play a safety protection role. In the prior art, an electromagnetic stop valve and a safety valve are used as two independent valves, namely, in order to control the on-off of two flow passages and the highest working pressure in a pipeline, the electromagnetic stop valve and the safety valve are adopted, so that the use cost and the installation complexity are increased, and the integral volume is also increased.
Disclosure of Invention
The invention aims to provide an electromagnetic stop safety valve which can realize the electromagnetic stop function and the safety valve function.
In order to achieve the purpose, the invention provides the following technical scheme:
an electromagnetic cut-off safety valve comprises a valve sleeve, wherein a valve hole with an opening at the upper end is arranged in the valve sleeve, a through hole is arranged at the bottom of the valve hole in the valve sleeve, the lower end of the through hole is a P port, a T port communicated with the valve hole is arranged on the side surface of the valve sleeve, a valve core used for controlling the through hole to be switched on and off is connected in the valve hole in a sliding mode, a magnetic sleeve is fixedly arranged at the opening at the upper end of the valve hole, and a control cavity is formed between; a sliding hole is formed in the magnetic conduction sleeve, a threaded sleeve is fixedly arranged at the upper end of the magnetic conduction sleeve, and a coil is arranged on the outer circumferential side surface of the magnetic conduction sleeve between the threaded sleeve and the valve sleeve; a plug is fixedly arranged at the upper end of the magnetic conduction sleeve in the screw sleeve, and the lower end of the plug extends into the sliding hole; the sliding hole is internally and slidably connected with a moving iron, and the plug is slidably connected with a pilot valve rod which penetrates through the moving iron and the magnetic sleeve and extends into the control cavity; a convex shoulder is arranged between the moving iron and the bottom of the sliding hole on the outer circumferential side surface of the pilot valve rod; a first spring used for forcing the pilot valve rod and the moving iron to move upwards is arranged between the shoulder and the bottom of the sliding hole in the sliding hole; the side surface of the valve core is provided with a first damping hole for communicating the T port with the control cavity, and the lower end of the valve core is provided with a second damping hole communicated with the control cavity; the lower end of the pilot valve rod is provided with a convex tip for controlling the on-off of the first damping hole; when the coil loses power, the pilot valve rod moves upwards under the action of the first spring, the convex tip leaves the first damping hole, and the electromagnetic stop safety valve is in a conducting state; when the coil is electrified, the moving iron drives the pilot valve rod to move downwards, the convex tip is tightly pressed on the first damping hole, meanwhile, the pilot valve rod drives the valve core to tightly press the opening at the upper end of the through hole, and the electromagnetic stop safety valve is in a stop state and plays a role of a safety valve at the same time.
In a further technical scheme, a spring cavity with an opening at the upper end is arranged in the plug, and the upper end of the pilot valve rod extends into the spring cavity; a plug is fixedly installed at an opening at the upper end of the spring cavity, the plug is in threaded connection with an adjusting rod of which the lower end extends into the spring cavity, a second spring for forcing the pilot valve rod to move downwards is arranged between the lower end of the adjusting rod and the upper end of the pilot valve rod in the spring cavity, and the pre-tightening force of the first spring is greater than that of the second spring; the pre-tightening force of the second spring is adjusted through the rotation adjusting rod, so that the opening pressure of the electromagnetic stop safety valve can be adjusted when the electromagnetic stop safety valve serves as a safety valve.
In a further technical scheme, an upper spring cushion is arranged between the upper end of the second spring and the lower end of the adjusting rod in the spring cavity, and a lower spring cushion is arranged between the lower end of the second spring and the upper end of the pilot valve rod.
In a further technical scheme, the adjusting rod is provided with a locking nut in threaded connection above the plug.
In a further technical scheme, the sliding hole comprises an upper sliding hole and a lower sliding hole which is positioned below the upper sliding hole and communicated with the upper sliding hole, the sliding iron is positioned in the upper sliding hole, and the lower end of the first spring is abutted against the lower end of the lower sliding hole; and a shoulder is formed between the upper sliding hole and the lower sliding hole in the magnetic conduction sleeve, and when the coil is electrified, the moving iron moves downwards until the lower end of the moving iron is abutted against the shoulder.
Advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
the electromagnetic stop safety valve can not only realize the electromagnetic stop function, but also realize the safety valve function, thereby saving the cost, and having compact volume and simple processing; when the coil loses power, the pilot valve rod moves upwards under the action of the first spring, the convex tip leaves the first damping hole, and the electromagnetic stop safety valve is in a conducting state; when the coil is electrified, the moving iron drives the pilot valve rod to move downwards, the convex tip is tightly pressed on the first damping hole, meanwhile, the pilot valve rod drives the valve core to tightly press the opening at the upper end of the through hole, and the electromagnetic stop safety valve is in a stop state and plays a role of a safety valve at the same time.
Drawings
FIG. 1 is a cross-sectional view of the coil of the present invention when it is de-energized;
FIG. 2 is a cross-sectional view of the present invention with the coil de-energized and the valve core open;
fig. 3 is a cross-sectional view of the coil of the present invention when energized.
Detailed Description
Referring to fig. 1-3, an electromagnetic cut-off safety valve includes a valve housing 1, a valve hole 102 with an open upper end is arranged in the valve housing 1, a through hole 101 is arranged at the bottom of the valve hole 102 in the valve housing 1, a P port is arranged at the lower end of the through hole 101, a T port communicated with the valve hole 102 is arranged on the side surface of the valve housing 1, a valve core 2 for controlling the on-off of the through hole 101 is connected in the valve hole 102 in a sliding manner, a flux sleeve 4 is fixedly arranged at the opening at the upper end of the valve hole 102, and a control cavity 1a is formed between the valve core 2 and the; a sliding hole is arranged in the flux sleeve 4, the sliding hole comprises an upper sliding hole 41 and a lower sliding hole 42 which is positioned below the upper sliding hole 41 and communicated with the upper sliding hole 41, and a shoulder 43 is formed between the upper sliding hole 41 and the lower sliding hole 42 in the flux sleeve 4; the upper end of the magnetic sleeve 4 is fixedly provided with a threaded sleeve 71, and the outer circumferential side surface of the magnetic sleeve 4 is provided with a coil 11 between the threaded sleeve 71 and the valve sleeve 1; a plug 7 is fixedly arranged at the upper end of the magnetic conductive sleeve 4 in the threaded sleeve 71, and the lower end of the plug 7 extends into the upper sliding hole 41; the inner part of the upper sliding hole 41 is connected with a moving iron 6 in a sliding way, and the plug 7 is connected with a pilot valve rod 3 which penetrates through the moving iron 6 and the magnetic conduction sleeve 4 and extends into the control cavity 1a in a sliding way; a convex shoulder 32 is arranged on the outer circumferential side surface of the pilot valve rod 3 below the moving iron 6; a first spring 5 for forcing the pilot valve rod 3 and the moving iron 6 to move upwards is arranged between the shoulder 32 and the bottom of the lower sliding hole 42 in the lower sliding hole 42; a first damping hole 21 for communicating the T port with the control cavity 1a is formed in the side face of the valve core 2, and a second damping hole 22 communicated with the control cavity 1a is formed in the lower end of the valve core 2; the lower end of the pilot valve rod 3 is provided with a convex tip 31 for controlling the on-off of the first damping hole 21; when the coil 11 is de-energized, the pilot valve rod 3 moves upwards under the action of the first spring 5, the convex tip 31 leaves the first damping hole 21, and the electromagnetic cut-off safety valve is in a conducting state at the moment; when the coil 11 is electrified, the moving iron 6 drives the pilot valve rod 3 to move downwards until the lower end of the moving iron 6 is abutted to the shoulder 43, the convex tip 31 is pressed on the first damping hole 21, meanwhile, the pilot valve rod 3 drives the valve core 2 to be pressed on the opening at the upper end of the through hole 101, and the electromagnetic stop safety valve is in a stop state and plays a role of a safety valve.
A spring cavity 71 with an opening at the upper end is arranged in the plug 7, and the upper end of the pilot valve rod 3 extends into the spring cavity 71; the upper end opening fixed mounting of spring chamber 71 has plug 9, plug 9 threaded connection has the lower extreme to stretch into the regulation pole 10 in the spring chamber 71, be equipped with the second spring 8 that is used for forcing pilot valve rod 3 downstream between the lower extreme of regulation pole 10 and the upper end of pilot valve rod 3 in spring chamber 71, the pretightning force of first spring 5 is greater than the pretightning force of second spring 8. An upper spring pad 81 is disposed between the upper end of the second spring 8 and the lower end of the adjusting lever 10 in the spring chamber 71, and a lower spring pad 82 is disposed between the lower end of the second spring 8 and the upper end of the pilot valve lever 3. The adjusting rod 10 is provided with a locking nut 83 in threaded connection above the plug 9. Here, the opening pressure when the electromagnetic shut-off safety valve is used as a safety valve can be adjusted by adjusting the biasing force of the second spring 8 by rotating the adjustment lever 10.
When the coil 11 is not charged, because the pretightening force of the first spring 5 is greater than the pretightening force of the second spring 8, under the action of the pretightening force difference value between the first spring 5 and the second spring 8, the pilot valve rod 3 moves upwards to enable the convex tip 31 to open the first damping hole 21, then oil at the port P flows into the port T through the second damping hole 22, the control cavity 1a and the first damping hole 21, because of the damping effect of the second damping hole 22, the pressure at the port P is greater than the pressure of the control cavity 1a, the valve core 2 moves upwards under the action of the pressure difference between the port P and the control cavity 1a to open the through hole 101, the oil flows into the port T from the port P through the through hole 101, and at this time, the electromagnetic shutoff safety valve is in a conduction state.
When the coil 11 is electrified, under the action of a magnetic field generated by the coil 11 and the acting force of the second spring 8, the moving iron 6 overcomes the acting force of the first spring 5 to move downwards to attract the magnetic sleeve 4, so as to drive the pilot valve rod 3 to move downwards, so that the convex tip 31 is sealed and blocked with the first damping hole 21, the pressure of the port P enters the control cavity 1a from the second damping hole 22, at the moment, the pressure of the port P is equal to the pressure of the control cavity 1a, but the downward acting area of the pressure in the control cavity 1a on the valve core 2 is larger than the upward acting area of the pressure of the port P on the valve core 2, the valve core 2 moves downwards under the resultant force action, the through hole 101 is closed, and the port P is not communicated with the port T; at the moment, the electromagnetic cut-off safety valve is in a cut-off state.
When the coil 11 is electrified to enable the valve to be in a cut-off state, if the resultant force (upward) of the upward thrust generated by the pressure of the port P acting on the pilot valve rod 3 and the pretightening force of the first spring 5 is greater than the resultant force (downward) of the pretightening force and the electromagnetic force of the second spring 8, the pilot valve rod 3 moves upward to open the first damping hole 21, so that the pressure of the control cavity 1a is smaller than the pressure of the port P, the valve core 2 moves upward under the action of pressure difference to open the through hole 101, and the oil liquid of the port P flows into the port T to play a role of safety protection; when the pressure of the port P is reduced, the pilot valve rod 3 closes the first damping hole 21 again, the valve core 2 closes the through hole 101 again, and the present invention is in a cut-off state. The maximum safe pressure of the port P can be adjusted by the adjusting rod 10.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the technical principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.
Claims (5)
1. An electromagnetic cut-off safety valve comprises a valve sleeve and is characterized in that a valve hole with an opening at the upper end is arranged in the valve sleeve, a through hole is formed in the valve sleeve at the bottom of the valve hole, the lower end of the through hole is a P port, a T port communicated with the valve hole is formed in the side face of the valve sleeve, a valve core used for controlling the through hole to be switched on and off is connected in the valve hole in a sliding mode, a magnetic sleeve is fixedly installed at the opening at the upper end of the valve hole, and a control cavity is formed between the; a sliding hole is formed in the magnetic conduction sleeve, a threaded sleeve is fixedly arranged at the upper end of the magnetic conduction sleeve, and a coil is arranged on the outer circumferential side surface of the magnetic conduction sleeve between the threaded sleeve and the valve sleeve; a plug is fixedly arranged at the upper end of the magnetic conduction sleeve in the screw sleeve, and the lower end of the plug extends into the sliding hole; the sliding hole is internally and slidably connected with a moving iron, and the plug is slidably connected with a pilot valve rod which penetrates through the moving iron and the magnetic sleeve and extends into the control cavity; a convex shoulder is arranged between the moving iron and the bottom of the sliding hole on the outer circumferential side surface of the pilot valve rod; a first spring used for forcing the pilot valve rod and the moving iron to move upwards is arranged between the shoulder and the bottom of the sliding hole in the sliding hole; the side surface of the valve core is provided with a first damping hole for communicating the T port with the control cavity, and the lower end of the valve core is provided with a second damping hole communicated with the control cavity; the lower end of the pilot valve rod is provided with a convex tip for controlling the on-off of the first damping hole; when the coil loses power, the pilot valve rod moves upwards under the action of the first spring, the convex tip leaves the first damping hole, and the electromagnetic stop safety valve is in a conducting state; when the coil is electrified, the moving iron drives the pilot valve rod to move downwards, the convex tip is tightly pressed on the first damping hole, meanwhile, the pilot valve rod drives the valve core to tightly press the opening at the upper end of the through hole, and the electromagnetic stop safety valve is in a stop state and plays a role of a safety valve at the same time.
2. The electromagnetic cut-off safety valve according to claim 1, characterized in that the plug is provided with a spring cavity with an open upper end, and the upper end of the pilot valve rod extends into the spring cavity; the upper end opening fixed mounting in spring chamber has the plug, plug female connection has the lower extreme to stretch into the regulation pole of spring intracavity, be equipped with the second spring that is used for forcing pilot valve pole downstream between the lower extreme of regulation pole and the upper end of pilot valve pole in the spring chamber, the pretightning force of first spring is greater than the pretightning force of second spring.
3. The electromagnetic shut-off safety valve of claim 2 wherein an upper spring pad is disposed in the spring chamber between the upper end of the second spring and the lower end of the adjustment lever and a lower spring pad is disposed between the lower end of the second spring and the upper end of the pilot valve lever.
4. The electromagnetic shut-off and safety valve of claim 2 wherein the adjusting rod is provided with a lock nut in threaded connection above the plug.
5. The electromagnetic cut-off safety valve according to claim 1, wherein the slide hole comprises an upper slide hole and a lower slide hole which is positioned below the upper slide hole and communicated with the upper slide hole, the sliding iron is positioned in the upper slide hole, and the lower end of the first spring is abutted against the lower end of the lower slide hole; and a shoulder is formed between the upper sliding hole and the lower sliding hole in the magnetic conduction sleeve, and when the coil is electrified, the moving iron moves downwards until the lower end of the moving iron is abutted against the shoulder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010109732.XA CN111271477A (en) | 2020-02-22 | 2020-02-22 | Electromagnetic stop safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010109732.XA CN111271477A (en) | 2020-02-22 | 2020-02-22 | Electromagnetic stop safety valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111271477A true CN111271477A (en) | 2020-06-12 |
Family
ID=71003672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010109732.XA Withdrawn CN111271477A (en) | 2020-02-22 | 2020-02-22 | Electromagnetic stop safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111271477A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677922A (en) * | 2020-06-16 | 2020-09-18 | 东莞海特帕沃液压科技有限公司 | Safety valve |
| CN111692388A (en) * | 2020-06-16 | 2020-09-22 | 邵玉强 | Electromagnetic valve and working method thereof |
| CN111749942A (en) * | 2020-06-16 | 2020-10-09 | 宁波源码智能机械科技有限公司 | Hydraulic machine pressure control system and control method |
| CN111747218A (en) * | 2020-06-16 | 2020-10-09 | 武芳 | Controller for winding device of textile machine |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000274555A (en) * | 1999-03-23 | 2000-10-03 | Toyooki Kogyo Co Ltd | Opening and closing valve |
| JP2000356275A (en) * | 1999-06-15 | 2000-12-26 | Seiko Instruments Inc | Variable pressure valve |
| CN1447051A (en) * | 2002-03-22 | 2003-10-08 | 刘峰 | Electromagnet cut off valve and four-way valve with three positions |
| CN202118266U (en) * | 2011-06-10 | 2012-01-18 | 山东泰丰液压股份有限公司 | Safety electromagnetic stopping cartridge valve |
| CN102506208A (en) * | 2011-12-19 | 2012-06-20 | 铜陵市三圆特种铸造有限责任公司 | Gas electromagnetic valve |
| CN104948792A (en) * | 2014-03-27 | 2015-09-30 | 姚丽 | Pilot operated compound relief valve |
| CN108266431A (en) * | 2018-01-23 | 2018-07-10 | 邵立坤 | A kind of secondary pressure bidirectional relief valve |
| CN108709007A (en) * | 2018-06-12 | 2018-10-26 | 东莞海特帕沃液压科技有限公司 | A kind of electromagnet cut off valve |
-
2020
- 2020-02-22 CN CN202010109732.XA patent/CN111271477A/en not_active Withdrawn
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000274555A (en) * | 1999-03-23 | 2000-10-03 | Toyooki Kogyo Co Ltd | Opening and closing valve |
| JP2000356275A (en) * | 1999-06-15 | 2000-12-26 | Seiko Instruments Inc | Variable pressure valve |
| CN1447051A (en) * | 2002-03-22 | 2003-10-08 | 刘峰 | Electromagnet cut off valve and four-way valve with three positions |
| CN202118266U (en) * | 2011-06-10 | 2012-01-18 | 山东泰丰液压股份有限公司 | Safety electromagnetic stopping cartridge valve |
| CN102506208A (en) * | 2011-12-19 | 2012-06-20 | 铜陵市三圆特种铸造有限责任公司 | Gas electromagnetic valve |
| CN104948792A (en) * | 2014-03-27 | 2015-09-30 | 姚丽 | Pilot operated compound relief valve |
| CN108266431A (en) * | 2018-01-23 | 2018-07-10 | 邵立坤 | A kind of secondary pressure bidirectional relief valve |
| CN108709007A (en) * | 2018-06-12 | 2018-10-26 | 东莞海特帕沃液压科技有限公司 | A kind of electromagnet cut off valve |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111677922A (en) * | 2020-06-16 | 2020-09-18 | 东莞海特帕沃液压科技有限公司 | Safety valve |
| CN111692388A (en) * | 2020-06-16 | 2020-09-22 | 邵玉强 | Electromagnetic valve and working method thereof |
| CN111749942A (en) * | 2020-06-16 | 2020-10-09 | 宁波源码智能机械科技有限公司 | Hydraulic machine pressure control system and control method |
| CN111747218A (en) * | 2020-06-16 | 2020-10-09 | 武芳 | Controller for winding device of textile machine |
| CN111677922B (en) * | 2020-06-16 | 2023-08-08 | 涉县民安特种设备检测有限公司 | Safety 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 | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200612 |