CN111288192B - Pilot operated safety valve - Google Patents
Pilot operated safety valve Download PDFInfo
- Publication number
- CN111288192B CN111288192B CN202010280475.6A CN202010280475A CN111288192B CN 111288192 B CN111288192 B CN 111288192B CN 202010280475 A CN202010280475 A CN 202010280475A CN 111288192 B CN111288192 B CN 111288192B
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- valve body
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- 239000007788 liquid Substances 0.000 claims abstract description 28
- 238000007789 sealing Methods 0.000 claims abstract description 12
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000005540 biological transmission Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification 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
- F16K17/048—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
- F16K17/044—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
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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
- 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
- F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Safety Valves (AREA)
Abstract
The invention discloses a pilot operated safety valve, which is characterized in that: the valve body is internally provided with a liftable outer valve rod, an inner valve rod is rotationally arranged in the outer valve rod, the lower end of the outer valve rod is provided with a valve clack, a liquid inlet cavity is arranged in the valve clack, a liquid inlet hole communicated with the liquid inlet cavity is formed in the side wall of the valve clack, the lower end of the inner valve rod extends into the liquid inlet cavity, a pre-tightening spring is arranged between the lower end of the inner valve rod and the bottom of the liquid inlet cavity, the lower end of the inner valve rod is provided with a guide flap extending in the radial direction, a lower vertical hole is formed in the outer valve rod, and the lower port of the lower vertical hole is in sealing fit with the guide flap; a discharge cavity is arranged in the lower part of the valve body, a discharge hole for communicating the discharge cavity with the outside is arranged on the side wall of the valve body, a water inlet for communicating the discharge cavity with the main valve is arranged at the lower end of the valve body, a valve seat is arranged at the water inlet, and the valve clack is arranged on the lower side of the valve seat in a sealing fit manner; the valve body is also provided with a pressure taking structure and an inner valve rod driving structure. The invention has simple structure and stable operation.
Description
Technical Field
The invention relates to an improved safety valve, in particular to an improved pilot operated safety valve.
Background
The traditional pilot operated safety valve consists of a pilot valve and a main valve, wherein the pilot valve is of an independent spring type safety valve structure, and when the medium pressure in a container or a pipeline is abnormally boosted and exceeds a preset set pressure value, the pilot valve is opened, and then the main valve is driven to be opened to discharge the medium, so that the traditional pilot operated safety valve has the defects that: because a plurality of valves form a set of relief device, the relief device has the technical defects of high cost, complex structure, difficulty in opening the pilot valve and driving the main valve to open, complex maintenance and complexity.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a pilot operated safety valve with a simple structure and stable operation.
In order to solve the technical problems, the invention is realized by adopting the following technical scheme: this kind of pilot-operated formula relief valve, including the valve body, the valve body upper end is equipped with the block, and the valve body lower extreme is along being equipped with flange, its characterized in that: the valve body is internally provided with a liftable outer valve rod, an inner valve rod is rotationally arranged in the outer valve rod, the lower end of the outer valve rod is provided with a valve clack, a liquid inlet cavity is arranged in the valve clack, a liquid inlet hole communicated with the liquid inlet cavity is formed in the side wall of the valve clack, the lower end of the inner valve rod extends into the liquid inlet cavity, a pre-tightening spring is arranged between the lower end of the inner valve rod and the bottom of the liquid inlet cavity, the lower end of the inner valve rod is provided with a guide flap extending in the radial direction, a lower vertical hole is formed in the outer valve rod, and the lower port of the lower vertical hole is in sealing fit with the guide flap; a discharge cavity is arranged in the lower part of the valve body, a discharge hole for communicating the discharge cavity with the outside is arranged on the side wall of the valve body, a water inlet for communicating the discharge cavity with the main valve is arranged at the lower end of the valve body, a valve seat is arranged at the water inlet, and the valve clack is arranged on the lower side of the valve seat in a sealing fit manner; the lower end of the valve body is also provided with a pressure taking hole, a liftable pressure taking plate is arranged in the pressure taking hole, the upper end of the pressure taking plate is abutted with an adjusting spring, the upper end of the adjusting spring is abutted against an adjusting sleeve, the adjusting sleeve is in threaded connection with the pressure taking hole, and the pressure taking plate is also provided with a push plate penetrating through the adjusting sleeve; the upper end of the discharge cavity is provided with a positioning plate, the upper end of the positioning plate is provided with a hydraulic cylinder, the hydraulic cylinder is internally provided with a piston, a piston cavity positioned above the piston and a reset spring positioned below the piston, the piston is connected with an outer valve rod, the piston cavity is communicated with the upper port of a lower vertical hole of the outer valve rod, the upper end of the inner valve rod is provided with an upper vertical hole, the outer valve rod is provided with a liquid discharge hole communicated with the lower port of the upper vertical hole and the piston cavity, and the upper port of the upper vertical hole is communicated with the outside; the positioning plate is provided with fan-shaped plates, the fan-shaped plates are movably connected with the positioning plate through connecting sleeves, arc-shaped guide grooves for the connecting sleeves to penetrate through are formed in the corresponding fan-shaped plates, the inner ends of the fan-shaped plates axially slide and are circumferentially connected with the inner valve rods in a transmission mode, hollow portions are arranged on the corresponding outer valve rods, driving grooves are formed in the outer ends of the fan-shaped plates, the push plate penetrates into the driving grooves, and driving cambered surfaces are formed in the push plate.
The upper end of the reset spring is abutted against the piston, the lower end of the reset spring is abutted against the spring seat, and the spring seat is installed on the inner wall of the hydraulic cylinder.
The upper end of the hydraulic cylinder is provided with a pressing plate which is fixed in the valve body, and the corresponding pressing plate is provided with a hole for the outer valve rod and the inner valve rod to pass through.
The cap is provided with an opening which is communicated with the upper port of the upper vertical hole and the outside.
The improved pilot operated safety valve has the advantages that the structure is simple, the work is stable, the safety valve is used as a pilot valve of a main valve and is provided with a relief structure, the condition that the main valve cannot be driven to open and relieve is avoided, and the relief pressure value of the safety valve is adjustable.
Drawings
The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a cross-sectional view E-E of fig. 1 according to the present invention.
FIG. 3 is a schematic view of the invention taken along line C of FIG. 1.
Detailed Description
The drawings show the structure of the invention, and the details thereof are further described below with reference to the drawings. In the embodiment, the pilot operated safety valve comprises a valve body 2, a cap 15 is arranged at the upper end of the valve body 2, a connecting flange 1 is arranged at the lower end edge of the valve body 2, the connecting flange 1 is used for connecting with a main valve, a liftable outer valve rod 3 is arranged in the valve body 2, an inner valve rod 5 which is coaxially arranged is rotatably arranged in the outer valve rod 3, a valve clack 30 is arranged at the lower end of the outer valve rod 3, a liquid inlet cavity 26 is arranged in the valve clack 30, a liquid inlet hole 29 communicated with the liquid inlet cavity 26 is formed in the side wall of the valve clack 30, the lower end of the inner valve rod 5 extends into the liquid inlet cavity 26, a pre-tightening spring 11 is arranged between the lower end of the inner valve rod 5 and the bottom of the liquid inlet cavity 26, a guide flap 28 which radially extends is arranged at the lower end of the inner valve rod 5, a lower vertical hole 7 is arranged in the outer valve rod 3, and the lower port of the lower vertical hole 7 is in sealing fit with the guide flap 28; a discharge cavity 6 is arranged in the lower part of the valve body 2, a discharge hole 4 for communicating the discharge cavity 6 with the outside is arranged on the side wall of the valve body 2, a water inlet 33 for communicating the discharge cavity 6 with a main valve is arranged at the lower end of the valve body 2, a valve seat 31 is arranged at the water inlet 33, and the valve clack 30 is arranged on the lower side of the valve seat 31 in a sealing fit manner; the lower end of the valve body 2 is also provided with a pressure taking hole 25, a liftable pressure taking plate 24 is arranged in the pressure taking hole 25, the upper end of the pressure taking plate 24 is abutted with an adjusting spring 23, the upper end of the adjusting spring 23 is abutted on an adjusting sleeve 22, the adjusting sleeve 22 is in threaded connection with the pressure taking hole 25, and the pressure taking plate 24 is also provided with a push plate 21 penetrating through the adjusting sleeve 22; the upper end of the discharge cavity 6 is provided with a positioning plate 8, the upper end of the positioning plate 8 is provided with a hydraulic cylinder 9, a piston 12, a piston cavity 13 positioned above the piston 12 and a return spring 27 positioned below the piston 12 are arranged in the hydraulic cylinder 9, the piston 12 is connected with the outer valve rod 3, the piston cavity 13 is communicated with the upper port of the lower vertical hole 7 of the outer valve rod 3, the upper end of the inner valve rod 5 is provided with an upper vertical hole 16, the outer valve rod 3 is provided with a liquid discharge hole 17 communicated with the lower port of the upper vertical hole 16 and the piston cavity 13, and the upper port of the upper vertical hole 16 is communicated with the outside; the valve rod driving mechanism is characterized in that a fan-shaped plate 20 is arranged on the positioning plate 8, the fan-shaped plate 20 is movably connected with the positioning plate 8 through a connecting sleeve 19, an arc-shaped guide groove 34 for the connecting sleeve 19 to penetrate through is formed in the corresponding fan-shaped plate 20, the inner end of the fan-shaped plate 20 is connected with the inner valve rod 5 in an axial sliding mode and a circumferential transmission mode, a hollow portion 18 is formed in the corresponding outer valve rod 3, a driving groove 32 is formed in the outer end of the fan-shaped plate 20, the push plate 21 penetrates into the driving groove 32, and a driving arc surface is formed in the push plate 21.
In a more preferred embodiment, the upper end of the return spring 27 abuts against the piston 12, the lower end of the return spring 27 abuts against the spring seat 10, and the spring seat 10 is attached to the inner wall of the hydraulic cylinder 9.
In a further preferred embodiment, a pressure plate 14 is arranged at the upper end of the hydraulic cylinder 9, the pressure plate 14 is fixed in the valve body 2, and an opening through which the outer valve rod 3 and the inner valve rod 5 pass is arranged on the corresponding pressure plate 14.
In a further preferred embodiment, the cap 15 is provided with an opening, and the opening is communicated with the upper port of the upper vertical hole 16 and the outside.
The relief process of the invention: when the medium pressure in the main valve (container or pipeline) rises abnormally and reaches a preset set pressure value, the medium pushes the pressure taking plate 24 to move upwards through the pressure taking hole 25, the push plate 21 is driven to move upwards, the sector plate 20 is further driven to rotate, the sector plate 20 drives the inner valve rod 5 and the guide flap 28 to rotate, the lower vertical hole 7 is communicated with the air inlet cavity, so that the medium in the container enters the piston cavity 13 through the liquid inlet hole 29, the liquid inlet cavity 26 and the lower vertical hole 7 in sequence, the medium in the piston cavity 13 pushes the piston 12, the outer valve rod 3, the inner valve rod 5 and the valve flap 30 to move downwards, the sealing surface of the valve flap 30 is separated from the sealing surface of the valve seat 31, the safety valve is opened, the medium in the main valve is discharged through the water inlet 33, the discharge cavity 6 and the discharge hole 4 in sequence, and at the moment, the upper vertical hole 16 is separated from the connection of the discharge hole 17 due to the rotation of the inner valve rod 5. When the medium pressure in the main valve is restored to a normal value, the pressure taking plate 24 moves downwards under the action of the adjusting spring 23 and drives the push plate 21 to move downwards, the push plate 21 drives the sector plate 20 to rotate in the opposite direction so as to drive the inner valve rod 5 and the guide flap 28 to rotate in the opposite direction, the guide flap 28 seals the lower end opening of the lower vertical hole 7 again, the lower vertical hole 7 is isolated from the liquid inlet cavity 26, meanwhile, the upper vertical hole 16 is communicated with the liquid outlet hole 17, the medium in the piston cavity 13 is discharged through the liquid outlet hole 17 and the upper vertical hole 16 in sequence, the piston 12 and the valve flap 30 move upwards under the pushing of the upper pre-tightening spring 11 and the medium in the main valve, the sealing surface of the valve flap 30 contacts the sealing surface of the valve seat 31 again, the valve is closed, and the one-time discharging process is completed.
Setting a set pressure value: the precompression amount of the adjusting spring 23 is controlled by rotating the adjusting sleeve 22, so that the magnitude of a downward force value applied to the pressure plate 24 is controlled to set a set pressure value, thereby adjusting a relief pressure value.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a pilot operated relief valve, is equipped with the block including the valve body, valve body upper end, and the valve body lower extreme is along being equipped with flange, its characterized in that: the valve body is internally provided with a liftable outer valve rod, an inner valve rod is rotationally arranged in the outer valve rod, the lower end of the outer valve rod is provided with a valve clack, a liquid inlet cavity is arranged in the valve clack, a liquid inlet hole communicated with the liquid inlet cavity is formed in the side wall of the valve clack, the lower end of the inner valve rod extends into the liquid inlet cavity, a pre-tightening spring is arranged between the lower end of the inner valve rod and the bottom of the liquid inlet cavity, the lower end of the inner valve rod is provided with a guide flap extending in the radial direction, a lower vertical hole is formed in the outer valve rod, and the lower port of the lower vertical hole is in sealing fit with the guide flap; a discharge cavity is arranged in the lower part of the valve body, a discharge hole for communicating the discharge cavity with the outside is arranged on the side wall of the valve body, a water inlet for communicating the discharge cavity with the main valve is arranged at the lower end of the valve body, a valve seat is arranged at the water inlet, and the valve clack is arranged on the lower side of the valve seat in a sealing fit manner; the lower end of the valve body is also provided with a pressure taking hole, a liftable pressure taking plate is arranged in the pressure taking hole, the upper end of the pressure taking plate is abutted with an adjusting spring, the upper end of the adjusting spring is abutted against an adjusting sleeve, the adjusting sleeve is in threaded connection with the pressure taking hole, and the pressure taking plate is also provided with a push plate penetrating through the adjusting sleeve; the upper end of the discharge cavity is provided with a positioning plate, the upper end of the positioning plate is provided with a hydraulic cylinder, the hydraulic cylinder is internally provided with a piston, a piston cavity positioned above the piston and a reset spring positioned below the piston, the piston is connected with an outer valve rod, the piston cavity is communicated with the upper port of a lower vertical hole of the outer valve rod, the upper end of the inner valve rod is provided with an upper vertical hole, the outer valve rod is provided with a liquid discharge hole communicated with the lower port of the upper vertical hole and the piston cavity, and the upper port of the upper vertical hole is communicated with the outside; the positioning plate is provided with fan-shaped plates, the fan-shaped plates are movably connected with the positioning plate through connecting sleeves, arc-shaped guide grooves for the connecting sleeves to penetrate through are formed in the corresponding fan-shaped plates, the inner ends of the fan-shaped plates axially slide and are circumferentially connected with the inner valve rods in a transmission mode, hollow portions are arranged on the corresponding outer valve rods, driving grooves are formed in the outer ends of the fan-shaped plates, the push plate penetrates into the driving grooves, and driving cambered surfaces are formed in the push plate.
2. A pilot operated safety valve according to claim 1, wherein: the upper end of the reset spring is abutted against the piston, the lower end of the reset spring is abutted against the spring seat, and the spring seat is installed on the inner wall of the hydraulic cylinder.
3. A pilot operated safety valve according to claim 1, wherein: the upper end of the hydraulic cylinder is provided with a pressing plate which is fixed in the valve body, and the corresponding pressing plate is provided with a hole for the outer valve rod and the inner valve rod to pass through.
4. A pilot operated safety valve according to claim 1, wherein: the cap is provided with an opening which is communicated with the upper port of the upper vertical hole and the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010280475.6A CN111288192B (en) | 2020-04-10 | 2020-04-10 | Pilot operated safety valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010280475.6A CN111288192B (en) | 2020-04-10 | 2020-04-10 | Pilot operated safety valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111288192A CN111288192A (en) | 2020-06-16 |
| CN111288192B true CN111288192B (en) | 2021-08-24 |
Family
ID=71029558
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010280475.6A Active CN111288192B (en) | 2020-04-10 | 2020-04-10 | Pilot operated safety valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111288192B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203880205U (en) * | 2014-06-23 | 2014-10-15 | 福建中石特种阀门制造有限公司 | Automotive emergency cut-off valve |
| CN205036925U (en) * | 2015-10-14 | 2016-02-17 | 开封市瑞发高中压阀门有限公司 | Split type pilot valve of lower valve clack of guide's formula relief valve |
| CN107355573A (en) * | 2017-09-09 | 2017-11-17 | 罗浮阀门集团有限公司 | Double control run-in index safety valve |
| CN108679279A (en) * | 2018-08-15 | 2018-10-19 | 永阀门集团有限公司 | Inner safety-valve |
| CN208764401U (en) * | 2018-07-13 | 2019-04-19 | 四川长仪油气集输设备股份有限公司 | A kind of low-pressure pilot-type safety valve |
| CN110230717A (en) * | 2019-07-12 | 2019-09-13 | 乐山市前沿油气设备制造有限公司 | Pilot operated safety valve |
| CN110307347A (en) * | 2019-07-19 | 2019-10-08 | 永嘉企达知识产权咨询有限公司 | A kind of high sealing pressure reducing valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106051208B (en) * | 2016-07-27 | 2019-11-29 | 路达(厦门)工业有限公司 | Switch the external member of valve cell, fluid switch and fluid switch |
-
2020
- 2020-04-10 CN CN202010280475.6A patent/CN111288192B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203880205U (en) * | 2014-06-23 | 2014-10-15 | 福建中石特种阀门制造有限公司 | Automotive emergency cut-off valve |
| CN205036925U (en) * | 2015-10-14 | 2016-02-17 | 开封市瑞发高中压阀门有限公司 | Split type pilot valve of lower valve clack of guide's formula relief valve |
| CN107355573A (en) * | 2017-09-09 | 2017-11-17 | 罗浮阀门集团有限公司 | Double control run-in index safety valve |
| CN208764401U (en) * | 2018-07-13 | 2019-04-19 | 四川长仪油气集输设备股份有限公司 | A kind of low-pressure pilot-type safety valve |
| CN108679279A (en) * | 2018-08-15 | 2018-10-19 | 永阀门集团有限公司 | Inner safety-valve |
| CN110230717A (en) * | 2019-07-12 | 2019-09-13 | 乐山市前沿油气设备制造有限公司 | Pilot operated safety valve |
| CN110307347A (en) * | 2019-07-19 | 2019-10-08 | 永嘉企达知识产权咨询有限公司 | A kind of high sealing pressure reducing valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111288192A (en) | 2020-06-16 |
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| PB01 | Publication | ||
| PB01 | Publication | ||
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| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Peixin Inventor after: Shi Jiebo Inventor after: Sun Gang Inventor after: Xiang Fei Inventor after: Lan Jingjing Inventor before: Lan Jingjing |
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| CB03 | Change of inventor or designer information | ||
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| TA01 | Transfer of patent application right |
Effective date of registration: 20210811 Address after: Room 602, 177 Gongwang street, Fuchun street, Fuyang District, Hangzhou City, Zhejiang Province Applicant after: Hangzhou Puchang Technology Co.,Ltd. Address before: 325500 Luoyang Zhen Subei Cun Beishan, Taishun County, Wenzhou City, Zhejiang Province Applicant before: Lan Jingjing |
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| TA01 | Transfer of patent application right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231122 Address after: 315600 No. 35, Keji Avenue, science and Technology Industrial Park, Ninghai County, Ningbo City, Zhejiang Province Patentee after: NINGBO HUAPING INTELLIGENT CONTROL TECHNOLOGY CO.,LTD. Address before: Room 602, 177 Gongwang street, Fuchun street, Fuyang District, Hangzhou City, Zhejiang Province Patentee before: Hangzhou Puchang Technology Co.,Ltd. |
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| TR01 | Transfer of patent right |