CN111306333B - Safety valve - Google Patents
Safety valve Download PDFInfo
- Publication number
- CN111306333B CN111306333B CN202010133318.2A CN202010133318A CN111306333B CN 111306333 B CN111306333 B CN 111306333B CN 202010133318 A CN202010133318 A CN 202010133318A CN 111306333 B CN111306333 B CN 111306333B
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- Prior art keywords
- port
- hole
- valve
- sleeve
- magnetic conduction
- 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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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 44
- 229910052742 iron Inorganic materials 0.000 claims description 22
- 238000013016 damping Methods 0.000 claims description 8
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Images
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
- 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
- F16K17/044—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 with more than one spring
-
- 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
- F16K17/048—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 combined with other safety valves, or with pressure control devices
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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
- 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
- F16K17/06—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 with special arrangements for adjusting the opening pressure
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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
- 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
- F16K17/10—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 with auxiliary valve for fluid operation of the main valve
-
- 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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/36—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor
- F16K31/40—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor
- F16K31/406—Actuating devices; Operating means; Releasing devices actuated by fluid in which fluid from the circuit is constantly supplied to the fluid motor with electrically-actuated member in the discharge of the motor acting on a piston
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetically Actuated Valves (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a safety valve, which comprises a valve sleeve, wherein a valve hole is formed in the valve sleeve, a through hole is formed in the bottom of the valve hole in the valve sleeve, 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 slidably connected in the valve hole, and a magnetic conduction sleeve is fixedly arranged at the upper end of the valve hole; a screw sleeve is fixedly arranged at the upper end of the magnetic conduction sleeve, a coil is arranged on the lateral surface of the outer circumference of the magnetic conduction sleeve, and a pilot valve core, an armature and a first spring are arranged in the magnetic conduction sleeve; the safety valve can realize the switching of unloading and safety protection functions through electric control, and has the advantages of simple structure, compact volume and low cost.
Description
Technical Field
The invention belongs to the technical field of valves, and particularly relates to a safety valve.
Background
The safety valve is a valve commonly used in industrial control and fluid pipelines, and is used for limiting the highest use pressure in the pipelines to play a role in safety protection. In the prior art, in order to realize the safety protection and unloading functions of the pipeline, an electromagnetic valve and a safety valve are adopted, whether the pipeline is unloaded or not is controlled by the energization of the electromagnetic valve, and the safety protection function is realized by the safety valve when the electromagnetic valve is in a non-unloading state, so that the use cost and the complexity of installation are increased, and the whole volume is also increased.
Disclosure of Invention
The invention aims to provide a safety valve which can realize an unloading function and a safety protection function.
In order to achieve the above purpose, the present invention provides the following technical solutions:
the 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 for controlling the on-off of the through hole is slidingly connected in the valve hole, a magnetic conduction sleeve is fixedly arranged at the opening at the upper end of the valve hole, and a control cavity is formed between the valve core and the magnetic conduction sleeve in the valve hole; the magnetic conduction sleeve is internally provided with a magnetic conduction sleeve through hole penetrating along the axial direction, the magnetic conduction sleeve through hole comprises a sliding hole, a mounting hole and a pilot valve port from top to bottom, the mounting hole is communicated with the T port through a communication flow passage arranged on the magnetic conduction sleeve and the valve sleeve, the upper end of the magnetic conduction sleeve is fixedly provided with a screw sleeve, and the outer circumferential side surface of the magnetic conduction sleeve is provided with a coil between the screw sleeve and the valve sleeve; a movable iron is connected in the sliding hole in a sliding way, and a pilot valve core matched with the pilot valve port to control the on-off of the control cavity and the mounting hole is arranged in the mounting hole; a first spring is arranged in the magnetic conduction sleeve through hole, one end of the first spring is propped against the lower end face of the moving iron, and the other end of the first spring is propped against the pilot valve core, so that the pilot valve core keeps a downward movement to block the trend of the pilot valve port; a first damping hole used for communicating the P port and the control cavity is formed in the valve core, and a second damping hole is formed in the pilot valve port; when the coil is powered off, the first spring is in a natural extension state, the valve core is in an opening state under the pressure difference between the P port and the control cavity, and the P port is communicated with the T port; when the coil is electrified, the moving iron moves downwards to compress the first spring, so that the pilot valve core is tightly pressed on the pilot valve port, when the pressure of the P port is lower than the set pressure of the first spring, the valve core is in a closed state, the P port is blocked from the T port, when the pressure of the P port is higher than the set pressure of the first spring, the pilot valve core moves upwards to open the pilot valve port, the valve core is in an open state under the pressure difference between the P port and the control cavity, and the P port is communicated with the T port.
In a further technical scheme, the upper end of the moving iron is provided with an inverted T-shaped limiting chute, the threaded sleeve is internally and in threaded connection with an adjusting rod, the lower end of the adjusting rod extends into the inverted T-shaped limiting chute, and the lower end of the adjusting rod is provided with a shoulder which is in sliding connection with the inverted T-shaped limiting chute; when the shoulder is close to the screw sleeve, the coil is electrified, the downward movement distance of the moving iron is short, and when the shoulder is far away from the screw sleeve, the coil is electrified, and the downward movement distance of the moving iron is long.
In a further technical scheme, a second spring is arranged in the control cavity, one end of the second spring is propped against the magnetic conduction sleeve, and the other end of the second spring is propped against the valve core, so that the valve core keeps a downward movement to cut off the communication trend of the P port and the T port.
In a further technical scheme, the adjusting rod is in threaded connection with a lock nut above the screw plug.
In a further technical scheme, the communication flow passage comprises a first through flow hole arranged on the magnetic conduction sleeve and a second through flow hole arranged on the valve sleeve, one end of the first through flow hole is communicated with the mounting hole, the other end of the first through flow hole is communicated with one end of the second through flow hole, and the other end of the second through flow hole is communicated with the T-shaped opening.
Advantageous effects
Compared with the prior art, the technical scheme of the invention has the following advantages:
the invention can lead the valve core to be in an open state by controlling the power failure of the coil, thereby leading the P port to be communicated with the T port and completing the unloading function; the valve core can be in a closed state by controlling the electrification of the coil, so that the safety protection function is realized; and the adjustment of the set pressure can be conveniently realized through the adjusting rod. Compared with the prior art, the invention realizes the functions of two valves through one valve, and has compact volume, simple structure and low cost.
Drawings
FIG. 1 is a cross-sectional view of the present invention;
fig. 2 is a schematic diagram of a three-dimensional structure of a moving iron according to the present invention.
Detailed Description
Referring to fig. 1-2, a safety valve comprises a valve sleeve 1, wherein a valve hole with an opening at the upper end is arranged in the valve sleeve 1, a through hole is arranged at the bottom of the valve hole in the valve sleeve 1, 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 2 for controlling the on-off of the through hole is slidingly connected in the valve hole, a magnetic conduction sleeve 4 is fixedly arranged at the opening at the upper end of the valve hole, and a control cavity 1a is formed between the valve core 2 and the magnetic conduction sleeve 4 in the valve hole; the magnetic conduction sleeve 4 is internally provided with a magnetic conduction sleeve through hole penetrating along the axial direction, the magnetic conduction sleeve through hole comprises a sliding hole, a mounting hole and a pilot valve port from top to bottom, the mounting hole is communicated with the T port through a communication flow passage arranged on the magnetic conduction sleeve 4 and the valve sleeve 1, the upper end of the magnetic conduction sleeve 4 is fixedly provided with a screw sleeve 8, and the outer circumferential side surface of the magnetic conduction sleeve 4 is provided with a coil 9 between the screw sleeve 8 and the valve sleeve 1; a moving iron 6 is slidably connected in the sliding hole, and a pilot valve core 5 which is matched with the pilot valve port to control the on-off of the control cavity 1a and the mounting hole is arranged in the mounting hole; a first spring 32 is arranged in the magnetic conduction sleeve through hole, one end of the first spring 32 is propped against the lower end face of the moving iron 6, and the other end of the first spring is propped against the pilot valve core 5, so that the pilot valve core 5 keeps moving downwards to block the trend of the pilot valve port; a first damping hole 21 for communicating the P port with the control cavity 1a is arranged in the valve core 2, and a second damping hole 42 is arranged in the pilot valve port; when the coil 9 is powered off, the first spring 32 is in a natural extension state, the valve core 2 is in an opening state under the internal pressure difference between the P port and the control cavity 1a, and the P port is communicated with the T port; when the coil 9 is electrified, the moving iron 6 moves downwards to compress the first spring 32, so that the pilot valve core 5 is tightly pressed on the pilot valve port, when the pressure of the P port is lower than the set pressure of the first spring 32, the valve core 2 is in a closed state, the P port is blocked from the T port, when the pressure of the P port is higher than the set pressure of the first spring 32, the pilot valve core 5 moves upwards to open the pilot valve port, the valve core 2 is in an open state under the pressure difference between the P port and the control cavity 1a, and the P port is communicated with the T port.
The upper end of the moving iron 6 is provided with an inverted T-shaped limiting chute 61, the threaded sleeve 8 is internally and in threaded connection with an adjusting rod 7, the lower end of the adjusting rod 7 extends into the inverted T-shaped limiting chute 61, and the lower end of the adjusting rod 7 is provided with a shoulder 71 which is in sliding connection with the inverted T-shaped limiting chute; when the shoulder 71 is close to the screw sleeve 8, the coil 9 is electrified, the downward movement distance of the moving iron 6 is short, and when the shoulder 71 is far away from the screw sleeve 8, the coil 9 is electrified, and the downward movement distance of the moving iron 6 is long.
And a second spring is arranged in the control cavity, one end of the second spring is propped against the magnetic conduction sleeve, and the other end of the second spring is propped against the valve core, so that the valve core keeps a downward movement to cut off the communication trend of the P port and the T port.
The adjusting rod is connected with a lock nut above the screw plug in a threaded manner.
The communication runner comprises a first through flow hole and a second through flow hole, wherein the first through flow hole is formed in the magnetic conduction sleeve, the second through flow hole is formed in the valve sleeve, one end of the first through flow hole is communicated with the mounting hole, the other end of the first through flow hole is communicated with one end of the second through flow hole, and the other end of the second through flow hole is communicated with the T-shaped opening.
The working principle of the invention is as follows:
the maximum safety pressure of the present invention can be set by adjusting the adjusting lever 7, wherein the more the adjusting lever 7 is adjusted downward, the longer the moving iron 6 moves downward, so that the greater the compression amount of the first spring 32, the higher the maximum safety pressure.
When the coil 9 is not electrified, the moving iron 6 is at the uppermost position, so that the first spring 32 is in a natural extension state, a medium at the P port pushes away the pilot valve core 5 to enter the mounting hole after passing through the first damping hole 21 and the control cavity 1a, and then returns to the T port after passing through the first through hole 41 and the second through hole 101 in sequence, and due to the effect of the first damping hole 21, a pressure difference exists between the P port and the control cavity 1a, and the pressure difference acts on the valve core 2, so that the valve core 2 moves upwards to open the through hole, the P port is communicated with the T port, and the unloading function is realized.
When the coil 9 is electrified, under the action of a magnetic field, the moving iron 6 moves downwards to compress the first spring 32 until the upper end surface of the shoulder 71 is propped against the step surface of the inverted T-shaped limiting chute 61, and the pilot valve core 5 is pressed on the pilot valve port under the action of the first spring 32. When the pressure of the port P is lower than the set pressure of the first spring 32, the pilot spool 5 is in a closed state, the spool 2 is in a closed state under the urging force of the second spring 31, and the port P is blocked from the port T. When the pressure of the port P is greater than the set pressure of the first spring 32, the pilot valve core 5 moves upwards to open the pilot valve port, the medium in the control cavity 1a flows into the port T after passing through the pilot valve port, the mounting hole, the first through hole 41 and the second through hole 101, the valve core 2 moves upwards under the action of the pressure difference between the port P and the control cavity 1a, the through hole is opened, and the medium of the port P flows into the port T to realize overflow, so that the safety protection function is realized.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (4)
1. The 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 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 for controlling the on-off of the through hole is slidingly connected in the valve hole, a magnetic conduction sleeve is fixedly arranged at the opening at the upper end of the valve hole, and a control cavity is formed between the valve core and the magnetic conduction sleeve in the valve hole; the magnetic conduction sleeve is internally provided with a magnetic conduction sleeve through hole penetrating along the axial direction, the magnetic conduction sleeve through hole comprises a sliding hole, a mounting hole and a pilot valve port from top to bottom, the mounting hole is communicated with the T port through a communication flow passage arranged on the magnetic conduction sleeve and the valve sleeve, the upper end of the magnetic conduction sleeve is fixedly provided with a screw sleeve, and the outer circumferential side surface of the magnetic conduction sleeve is provided with a coil between the screw sleeve and the valve sleeve; a movable iron is connected in the sliding hole in a sliding way, and a pilot valve core matched with the pilot valve port to control the on-off of the control cavity and the mounting hole is arranged in the mounting hole; a first spring is arranged in the magnetic conduction sleeve through hole, one end of the first spring is propped against the lower end face of the moving iron, and the other end of the first spring is propped against the pilot valve core, so that the pilot valve core keeps a downward movement to block the trend of the pilot valve port; a first damping hole used for communicating the P port and the control cavity is formed in the valve core, and a second damping hole is formed in the pilot valve port; when the coil is powered off, the first spring is in a natural extension state, the valve core is in an opening state under the pressure difference between the P port and the control cavity, and the P port is communicated with the T port; when the coil is electrified, the moving iron moves downwards to compress the first spring, so that the pilot valve core is tightly pressed on the pilot valve port, when the pressure of the P port is lower than the set pressure of the first spring, the valve core is in a closed state, the P port is blocked from the T port, when the pressure of the P port is higher than the set pressure of the first spring, the pilot valve core moves upwards to open the pilot valve port, the valve core is in an open state under the pressure difference between the P port and the control cavity, and the P port is communicated with the T port;
the upper end of the moving iron is provided with an inverted T-shaped limiting chute, the inner thread of the threaded sleeve is connected with an adjusting rod, the lower end of the adjusting rod extends into the inverted T-shaped limiting chute, and the lower end of the adjusting rod is provided with a shoulder which is in sliding connection with the inverted T-shaped limiting chute; when the shoulder is close to the screw sleeve, the coil is electrified, the downward movement distance of the moving iron is short, and when the shoulder is far away from the screw sleeve, the coil is electrified, and the downward movement distance of the moving iron is long.
2. The safety valve according to claim 1, wherein a second spring is arranged in the control cavity, one end of the second spring is propped against the magnetic conduction sleeve, and the other end of the second spring is propped against the valve core, so that the valve core keeps a downward movement to cut off the communication trend of the port P and the port T.
3. The safety valve of claim 1, wherein the adjustment rod is threaded with a lock nut over the plug.
4. The safety valve according to claim 1, wherein the communication flow passage comprises a first through-flow hole formed in the magnetic sleeve and a second through-flow hole formed in the valve sleeve, one end of the first through-flow hole is communicated with the mounting hole, the other end of the first through-flow hole is communicated with one end of the second through-flow hole, and the other end of the second through-flow hole is communicated with the T-port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133318.2A CN111306333B (en) | 2020-03-01 | 2020-03-01 | Safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010133318.2A CN111306333B (en) | 2020-03-01 | 2020-03-01 | Safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111306333A CN111306333A (en) | 2020-06-19 |
| CN111306333B true CN111306333B (en) | 2023-05-16 |
Family
ID=71145309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010133318.2A Active CN111306333B (en) | 2020-03-01 | 2020-03-01 | Safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111306333B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112032377B (en) * | 2020-08-21 | 2021-09-14 | 浙江大学 | Quick-response pilot operated safety valve and system overpressure quick protection method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0432608A (en) * | 1990-05-29 | 1992-02-04 | Toto Ltd | Method of supplying fuel to hot water maker |
| JP2004185840A (en) * | 2002-11-29 | 2004-07-02 | Keihin Corp | Solenoid valve for fuel cell |
| CN102650305A (en) * | 2012-05-02 | 2012-08-29 | 浙江工业大学 | 2D hydraulic-power-assisted electro-hydraulic proportional reversing valve |
| CN103032619A (en) * | 2012-12-14 | 2013-04-10 | 兰溪市中元电器有限公司 | Two-position three-way inverse proportion decompression electromagnetic valve for AT (Automatic Transmission) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0989142A (en) * | 1995-09-27 | 1997-03-31 | Smc Corp | Direct-acting electromagnetic valve |
| US6692409B2 (en) * | 2001-02-28 | 2004-02-17 | Kubota Corporation | Hydraulic change speed system for a working vehicle |
| JP5938378B2 (en) * | 2013-09-18 | 2016-06-22 | Ckd株式会社 | solenoid valve |
| CN104358914A (en) * | 2014-10-15 | 2015-02-18 | 浙江华益机械有限公司 | Novel proportional valve |
| CN107725517B (en) * | 2017-09-30 | 2019-12-27 | 中国第一汽车股份有限公司 | Proportional flow solenoid valve |
| CN107631041B (en) * | 2017-11-08 | 2019-05-21 | 江苏华展石油机械有限公司 | A kind of ratio one-way flow valves of double-direction control |
| CN108223864B (en) * | 2018-01-22 | 2019-05-07 | 合肥海源机械有限公司 | A kind of No leakage proportional velocity regulating valve |
| CN209743277U (en) * | 2019-04-26 | 2019-12-06 | 宁波汉商液压有限公司 | Stacked overflow valve |
| CN110686105B (en) * | 2019-10-12 | 2021-02-26 | 浙江锋源仪表有限公司 | Pilot-operated type pressure reducing valve |
-
2020
- 2020-03-01 CN CN202010133318.2A patent/CN111306333B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0432608A (en) * | 1990-05-29 | 1992-02-04 | Toto Ltd | Method of supplying fuel to hot water maker |
| JP2004185840A (en) * | 2002-11-29 | 2004-07-02 | Keihin Corp | Solenoid valve for fuel cell |
| CN102650305A (en) * | 2012-05-02 | 2012-08-29 | 浙江工业大学 | 2D hydraulic-power-assisted electro-hydraulic proportional reversing valve |
| CN103032619A (en) * | 2012-12-14 | 2013-04-10 | 兰溪市中元电器有限公司 | Two-position three-way inverse proportion decompression electromagnetic valve for AT (Automatic Transmission) |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111306333A (en) | 2020-06-19 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20230426 Address after: Oubei Town and Er Village, Yongjia County, Wenzhou City, Zhejiang Province, 325100 Applicant after: Zhejiang Renyi Valve Manufacturing Co.,Ltd. Address before: No. 201, building 2, zone 1, No. 2, headquarters 2nd Road, Songshanhu hi tech Industrial Development Zone, Dongguan City, Guangdong Province, 523000 Applicant before: DONGGUAN HAITE PAWO HYDRAULIC TECHNOLOGY Co.,Ltd. |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A safety valve Effective date of registration: 20231202 Granted publication date: 20230516 Pledgee: Industrial and Commercial Bank of China Limited Yongjia sub branch Pledgor: Zhejiang Renyi Valve Manufacturing Co.,Ltd. Registration number: Y2023330002920 |