CN112503225A - Tank root valve hydraulic system suitable for emergency fire - Google Patents
Tank root valve hydraulic system suitable for emergency fire Download PDFInfo
- Publication number
- CN112503225A CN112503225A CN202110156812.5A CN202110156812A CN112503225A CN 112503225 A CN112503225 A CN 112503225A CN 202110156812 A CN202110156812 A CN 202110156812A CN 112503225 A CN112503225 A CN 112503225A
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- oil
- hydraulic
- valve
- control valve
- hydraulic control
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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
- F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
- F16K17/36—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position
- F16K17/38—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature
- F16K17/383—Safety valves; Equalising valves, e.g. pressure relief valves actuated in consequence of extraneous circumstances, e.g. shock, change of position of excessive temperature the valve comprising fusible, softening or meltable elements, e.g. used as link, blocking element, seal, closure plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
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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
- F16K17/40—Safety valves; Equalising valves, e.g. pressure relief valves with a fracturing member, e.g. fracturing diaphragm, glass, fusible joint
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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
- F16K31/12—Actuating devices; Operating means; Releasing devices actuated by fluid
- F16K31/122—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
- F16K31/124—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated
- F16K31/1245—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston servo actuated with more than one valve
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a hydraulic system of a tank root valve applicable to an emergency fire, which comprises a hydraulic cylinder, an fusible plug, an oil-gas energy accumulator and a first hydraulic control valve, wherein the fusible plug is communicated with an inflation cavity of the oil-gas energy accumulator, an oil filling cavity of the oil-gas energy accumulator is communicated with a control cavity of the first hydraulic control valve, the first hydraulic control valve is in a normally closed state, and two oil ports of the first hydraulic control valve are respectively connected with an oil tank and one oil port of the hydraulic cylinder. The invention solves the problem of discharging hydraulic oil after the fusible plug is melted by arranging the fusible plug, the oil gas accumulator and the hydraulic control valve, avoids the discharge of the hydraulic oil polluting the environment or continuously supporting combustion and increasing the fire, quickly and automatically closes the valve after a fire disaster occurs, protects the system, reduces the loss, greatly improves the safety, keeps the integrity of the whole hydraulic system after the fire disaster occurs, has no loss of function and does not influence the basic valve opening and closing function.
Description
Technical Field
The invention relates to a hydraulic system, in particular to a hydraulic system of a tank root valve, which is suitable for emergency fire.
Background
The oil depot storage tank root valve is the key equipment that the oil tank oil storage goes out oil, under emergency such as meeting with the conflagration, needs to turn off fast, avoids the expansion of accident, and in the use of reality, the fusible alloy plug device is in the same place with hydraulic system direct mount, because the fusible alloy plug device is in the same place with hydraulic system, fusible alloy plug device itself is disposable again, and conflagration high temperature leads to the work back of fusible alloy plug device, appears three condition:
(1) hydraulic oil is released and leaked out through the fusible alloy plug device to pollute the environment, or the combustion is continuously supported and the fire is increased;
(2) the fusible alloy plug device damaged at high temperature causes the working hydraulic oil of the system to be discharged and a hydraulic circuit to be damaged, the original hydraulic system is not complete any more, a new fusible alloy plug device is required to be supplemented, the hydraulic oil released due to leakage is compensated, and then the hydraulic system of the actuator can be recovered to be normal again;
(3) this directly results in the actuator for emergency shutdown not being able to restore the normal opening or closing operation in an emergency situation in a good, urgent and rapid manner.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a hydraulic system of a tank root valve, which has the advantages of no leakage of hydraulic oil, intact original hydraulic system, no influence on basic switching function and higher safety performance after a fire disaster occurs.
The purpose of the invention is realized by the following technical scheme:
the hydraulic system of the tank root valve suitable for the emergency fire comprises a hydraulic cylinder, an fusible plug, an oil-gas energy accumulator and a hydraulic control valve, wherein the fusible plug is communicated with an inflation cavity of the oil-gas energy accumulator, an oil filling cavity of the oil-gas energy accumulator is communicated with a control cavity of the hydraulic control valve, the hydraulic control valve is in a normally closed state, and two oil ports of the hydraulic control valve are respectively connected with one of the oil ports of the oil tank and the hydraulic cylinder.
Preferably, the lower oil port of the hydraulic cylinder is connected with one end of a lower oil pipeline, the other end of the lower oil pipeline is connected with an oil tank, a second manual reversing valve is arranged on the lower oil pipeline, an electric pump is connected in parallel on the lower oil pipeline, the upper oil port of the hydraulic cylinder is connected with a normally-open oil port of the second hydraulic control valve, the other normally-open oil port of the second hydraulic control valve is connected with the oil tank, a first manual reversing valve is arranged between the second hydraulic control valve and the oil tank, a normally-closed oil port of the second hydraulic control valve is connected with the lower oil pipeline, a control cavity of the second hydraulic control valve is connected with the normally-closed oil port of the first hydraulic control valve, the other normally-closed oil port of the first hydraulic control valve is connected with the lower oil pipeline, a first manual valve is arranged between the first hydraulic control valve and the lower oil pipeline, a second energy accumulator is connected in parallel on the lower oil pipeline.
Preferably, the lower oil pipeline is also connected with a manual pump in parallel.
Preferably, a liquid level meter is arranged in the oil tank.
Preferably, the oil feeding port of the hydraulic cylinder is connected with a standby nitrogen cylinder.
Preferably, the oil tank is a double-layer heat insulation oil tank.
The invention has the beneficial effects that:
(1) through setting up fusible plug, oil gas energy storage ware, hydraulic control valve, solved the problem that the fusible plug melts the back hydraulic oil and discharged, avoided hydraulic oil to discharge the polluted environment, perhaps continue combustion-supporting, increase the intensity of a fire, quick self-closing of valve after the conflagration breaing out, protection system, loss reduction have improved the security greatly.
(2) The whole hydraulic system still keeps integrity after a fire disaster happens, the function is not lost, and the basic valve opening and closing function is not influenced.
Drawings
FIG. 1 is a schematic diagram of the basic structure of the present invention;
FIG. 2 is a schematic diagram of a hydraulic system according to an embodiment;
in the figure, 1-fusible plug, 2-oil gas accumulator, 3-first hydraulic control valve, 4-second accumulator, 5-liquid level meter, 6-manual pump, 7-electric pump, 8-oil drain pipeline, 9-oil tank, 10-second manual reversing valve, 11-hydraulic cylinder, 12-standby nitrogen cylinder, 13-second hydraulic control valve, 14-first manual reversing valve, 15-first manual valve and 16-second manual valve.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, the hydraulic system of the canister root valve applicable to an emergency fire includes a hydraulic cylinder 11, an fusible plug 1, an oil-gas accumulator 2 and a hydraulic control valve 3, wherein the fusible plug 1 is communicated with an inflation cavity of the oil-gas accumulator 2, an oil filling cavity of the oil-gas accumulator 2 is communicated with a control cavity of the hydraulic control valve 3, the hydraulic control valve 3 is in a normally closed state, and two oil ports of the hydraulic control valve 3 are respectively connected with one of the oil ports of an oil tank 9 and the hydraulic cylinder 11.
If the oil inlet is connected, when a fire disaster occurs, the fusible plug 1 is melted, high-pressure gas in an inflation cavity of the oil-gas energy accumulator 2 is discharged to release the pressure for a hydraulic system, after the oil-gas energy accumulator 2 loses the pressure, the first hydraulic control valve 3 is switched from a normally closed state to a normally open state, hydraulic oil enters the oil inlet of the hydraulic cylinder 11 from the oil tank 9, a piston rod of the hydraulic cylinder 11 is lowered, and the valve is closed; if connect the hydraulic fluid port down, when the conflagration breaing out, fusible plug 1 melts, and oil gas energy storage ware 2 aerifys intracavity high-pressure gas and lets out, for hydraulic system pressure release, after oil gas energy storage ware 2 loses pressure, hydraulic control valve 3 is switched into normally open state by normally closed state, and hydraulic oil gets into oil tank 9 from hydraulic cylinder 11 lower hydraulic fluid port, makes hydraulic cylinder 11 piston rod descend to this closes the valve.
Through setting up fusible plug, oil gas energy storage ware, hydraulic control valve, solved the problem that fusible plug melts back hydraulic oil and discharges, avoid hydraulic oil to discharge the polluted environment, perhaps continue combustion-supporting, increase the intensity of a fire, quick self-closing of valve after the conflagration breaks out, protection system, loss reduction, and improved the security greatly.
Referring to fig. 2, the present invention provides a detailed embodiment: the hydraulic cylinder 11 is connected with one end of a lower oil pipeline 8 through a lower oil port, the other end of the lower oil pipeline 8 is connected with an oil tank 9, a second manual reversing valve 10 is arranged on the lower oil pipeline 8, an electric pump 7 is connected to the lower oil pipeline 8 in parallel, an upper oil port of the hydraulic cylinder 11 is connected with a normally-open oil port of a second hydraulic control valve 13, the other normally-open oil port of the second hydraulic control valve 13 is connected with the oil tank 9 through the lower oil pipeline 8, a first manual reversing valve 14 is arranged between the second hydraulic control valve 13 and the oil tank 9, a normally-closed oil port of the second hydraulic control valve 13 is connected with the lower oil pipeline 8, a control cavity of the second hydraulic control valve 13 is connected with the normally-closed oil port of the first hydraulic control valve 3, the other normally-closed oil port of the first hydraulic control valve 3 is connected with the lower oil pipeline 8, a first manual valve 15 is arranged between the first hydraulic control valve 3 and the lower oil pipeline 8, a second energy accumulator 4 is connected to the lower oil pipeline 8 in parallel, and a.
The working process and principle are as follows: the first manual valve 15 and the second manual valve 16 are kept in a normally open state, before the system runs, the electric pump 7 is started to charge the second energy accumulator 4, and the second energy accumulator 4 absorbs part of the pressure of the hydraulic system and stores the pressure. In a conventional state, when a valve needs to be opened, the first manual reversing valve 14 is closed, the second manual reversing valve 10 is opened, the electric pump 7 is opened, and hydraulic oil is pumped into a lower oil port of the hydraulic cylinder 11 from the oil tank 9 to lift a piston rod of the hydraulic cylinder 11, so that the valve is opened; when the valve needs to be closed, the first manual reversing valve 14 is opened, and the second manual reversing valve 10 is closed, and the process and the principle are not described in detail. After a fire disaster occurs, the fusible plug 1 is melted, high-pressure gas in an inflation cavity of the oil-gas energy accumulator 2 is discharged to release pressure for a hydraulic system, after the oil-gas energy accumulator 2 loses pressure, the first hydraulic control valve 3 is switched from a normally closed state to a normally open state, the hydraulic system loses pressure at the moment, the second energy accumulator 4 releases pressure, hydraulic oil reaches the second hydraulic control valve 13 from the second energy accumulator 4 through the first hydraulic control valve 3, the second hydraulic control valve 13 is reversed, the oil pressure enters the top of the hydraulic cylinder 11 along an oil inlet of the hydraulic cylinder 11, a piston rod of the hydraulic cylinder 11 is lowered, and the valve is closed. In this case, when the valve needs to be opened or closed again, the one-number manual valve 15 is closed, and the valve opening and closing operation is performed. The integrality of the hydraulic system is guaranteed, the valve can be closed or opened under emergency, and meanwhile, the execution mechanism can quickly recover to work normally only by supplementing pressure to the oil-gas accumulator subsequently.
Further, the lower oil pipeline 8 is also connected with a manual pump 6 in parallel, double protection is provided, and the lower oil pipeline is used under the condition that the electric pump 7 fails; the liquid level meter 5 is arranged in the oil tank 9, so that the liquid level in the oil tank 9 can be conveniently observed, and whether the energy accumulator 4 is completely charged or not can be conveniently determined through the liquid level meter 5; an oil feeding port of the hydraulic cylinder 11 is connected with a standby nitrogen cylinder 12 to provide double protection and provide standby power for closing a valve; the oil tank 9 is a double-layer heat insulation oil tank, and safety performance is improved.
Furthermore, in this embodiment, the hydraulic cylinder 11 may adopt a straight stroke thrust output mechanism (application number: CN 201720007160.8) based on a guide structure invented by the company, and a dual-guide transmission structure (application number: CN 201630605906.6), where the dual-guide structure eliminates the offset force and prevents the valve rod from tilting or deforming, and in the long-distance thrust transmission, the piston output shaft does not deform and the thrust does not change direction, so as to improve the service life of the actuator and effectively protect the valve rod and the valve rod packing.
The standby nitrogen cylinder 12 can adopt a gas-liquid spring energy storage system (application number: CN 201610722404.0) designed by the gas-liquid combination invented by the company, the gas-liquid spring stores energy by utilizing the compressibility of nitrogen, and provides a power source for opening and closing a valve and an emergency valve of an actuating mechanism by utilizing hydraulic oil as an energy transmission medium, the gas-liquid combination spring has the characteristics of no reduction in rigidity, no failure in elasticity, adjustable release speed of the spring, lockable energy storage and the like, the weight, the overall dimension and the installation height of a product are reduced, and convenience is provided for field installation and equipment maintenance.
The manual pump 6 can adopt a universal manual pump (application number: CN 201210115198.9) invented by the company, can be operated at 360 degrees, and provides operation convenience for a narrow operation space on site.
The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (6)
1. Tank root valve hydraulic system suitable for urgent conflagration, its characterized in that: including pneumatic cylinder (11), fusible plug (1), oil gas energy storage ware (2), hydraulic control valve (3), fusible plug (1) and the chamber intercommunication of aerifing of oil gas energy storage ware (2), the oil charge chamber of oil gas energy storage ware (2) and the control chamber intercommunication of hydraulic control valve (3), hydraulic control valve (3) are in the normal close state, one of them hydraulic fluid port of oil tank (9) and pneumatic cylinder (11) is connected respectively to two hydraulic fluid ports of hydraulic control valve (3).
2. The canister root valve hydraulic system for an emergency fire of claim 1, wherein: the hydraulic cylinder (11) is connected with one end of a lower oil pipeline (8) through a lower oil port, the other end of the lower oil pipeline (8) is connected with an oil tank (9), a second manual reversing valve (10) is arranged on the lower oil pipeline (8), an electric pump (7) is connected on the lower oil pipeline (8) in parallel, the upper oil port of the hydraulic cylinder (11) is connected with a normally open oil port of a second hydraulic control valve (13), the other normally open oil port of the second hydraulic control valve (13) is connected with the oil tank (9), a first manual reversing valve (14) is arranged between the second hydraulic control valve (13) and the oil tank (9), a normally closed oil port of the second hydraulic control valve (13) is connected with the lower oil pipeline (8), a control cavity of the second hydraulic control valve (13) is connected with the normally closed oil port of a first hydraulic control valve (3), the other normally closed oil port of the first hydraulic control valve (3) is connected with the lower oil pipeline (8), and a first manual valve (15) is arranged between the first hydraulic valve (3) and the, a second energy accumulator (4) is connected in parallel on the lower oil pipeline (8), and a second manual valve (16) is arranged between the second energy accumulator (4) and the lower oil pipeline (8).
3. The canister root valve hydraulic system for an emergency fire of claim 2, wherein: and the lower oil pipeline (8) is also connected with a manual pump (6) in parallel.
4. The canister root valve hydraulic system for an emergency fire of claim 1, wherein: a liquid level meter (5) is arranged in the oil tank (9).
5. The canister root valve hydraulic system for an emergency fire of claim 1, wherein: and an oil feeding port of the hydraulic cylinder (11) is connected with a standby nitrogen cylinder (12).
6. The canister root valve hydraulic system for an emergency fire of claim 1, wherein: the oil tank (9) is a double-layer heat insulation oil tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110156812.5A CN112503225B (en) | 2021-02-05 | 2021-02-05 | Tank root valve hydraulic system suitable for emergency fire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110156812.5A CN112503225B (en) | 2021-02-05 | 2021-02-05 | Tank root valve hydraulic system suitable for emergency fire |
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| Publication Number | Publication Date |
|---|---|
| CN112503225A true CN112503225A (en) | 2021-03-16 |
| CN112503225B CN112503225B (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110156812.5A Active CN112503225B (en) | 2021-02-05 | 2021-02-05 | Tank root valve hydraulic system suitable for emergency fire |
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| Country | Link |
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| CN (1) | CN112503225B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483143A (en) * | 2021-09-08 | 2021-10-08 | 成都迈可森流体控制设备有限公司 | Quick and accurate response split-range actuator |
| CN114198347A (en) * | 2021-12-15 | 2022-03-18 | 中国石化销售股份有限公司华南分公司 | Hydraulic control system of safety cut-off valve |
| CN114370524A (en) * | 2021-12-15 | 2022-04-19 | 西安航天动力研究所 | Fireproof emergency shutdown electro-hydraulic control system |
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| JPS61223382A (en) * | 1985-09-26 | 1986-10-03 | Showa Aircraft Ind Co Ltd | Emergency closing device for bottom valve in tank lorry |
| CN2138226Y (en) * | 1992-06-19 | 1993-07-14 | 郑荣俊 | Support type heat-sensitive pipe for fire-proof valve |
| CN201255259Y (en) * | 2008-08-25 | 2009-06-10 | 杨建国 | Self-power hydraulic emergency cut-off valve |
| CN103410808A (en) * | 2013-07-17 | 2013-11-27 | 丽水中德石化设备有限公司 | Intrinsic safety type fire-proof and explosion-proof electro-hydraulic actuator and control method thereof |
| CN107191635A (en) * | 2017-06-30 | 2017-09-22 | 徐州八方安全设备有限公司 | A kind of long-tube trailer temperature/pressure bleeder valve |
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| CN108019538A (en) * | 2018-01-05 | 2018-05-11 | 浙江中德自控科技股份有限公司 | A kind of atmospheric control of tank pump isolation quick action emergency valve |
| CN108843844A (en) * | 2018-08-23 | 2018-11-20 | 沈阳东北电力调节技术有限公司 | Fire prevention electro-hydraulic actuator |
| CN111720093A (en) * | 2020-06-19 | 2020-09-29 | 维特力（深圳）流体工程有限公司 | Intelligent wellhead safety control system with flow monitoring function |
-
2021
- 2021-02-05 CN CN202110156812.5A patent/CN112503225B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2502901A1 (en) * | 1974-02-06 | 1975-08-07 | Willis Oil Tool Co | SAFETY DEVICE FOR FLUID PRESSURE MONITORING |
| JPS61223382A (en) * | 1985-09-26 | 1986-10-03 | Showa Aircraft Ind Co Ltd | Emergency closing device for bottom valve in tank lorry |
| CN2138226Y (en) * | 1992-06-19 | 1993-07-14 | 郑荣俊 | Support type heat-sensitive pipe for fire-proof valve |
| CN201255259Y (en) * | 2008-08-25 | 2009-06-10 | 杨建国 | Self-power hydraulic emergency cut-off valve |
| CN103410808A (en) * | 2013-07-17 | 2013-11-27 | 丽水中德石化设备有限公司 | Intrinsic safety type fire-proof and explosion-proof electro-hydraulic actuator and control method thereof |
| JP2018025272A (en) * | 2016-08-12 | 2018-02-15 | 日立オートモティブシステムズメジャメント株式会社 | Emergency shut-off valve device |
| CN107191635A (en) * | 2017-06-30 | 2017-09-22 | 徐州八方安全设备有限公司 | A kind of long-tube trailer temperature/pressure bleeder valve |
| CN108019538A (en) * | 2018-01-05 | 2018-05-11 | 浙江中德自控科技股份有限公司 | A kind of atmospheric control of tank pump isolation quick action emergency valve |
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| CN111720093A (en) * | 2020-06-19 | 2020-09-29 | 维特力（深圳）流体工程有限公司 | Intelligent wellhead safety control system with flow monitoring function |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113483143A (en) * | 2021-09-08 | 2021-10-08 | 成都迈可森流体控制设备有限公司 | Quick and accurate response split-range actuator |
| CN114198347A (en) * | 2021-12-15 | 2022-03-18 | 中国石化销售股份有限公司华南分公司 | Hydraulic control system of safety cut-off valve |
| CN114370524A (en) * | 2021-12-15 | 2022-04-19 | 西安航天动力研究所 | Fireproof emergency shutdown electro-hydraulic control system |
| CN114198347B (en) * | 2021-12-15 | 2024-03-19 | 中国石油化工股份有限公司 | Safety cut-off valve hydraulic control system |
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| Publication number | Publication date |
|---|---|
| CN112503225B (en) | 2021-04-20 |
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