CN103939631B - The safe gate valve in self-powered external control double loop - Google Patents
The safe gate valve in self-powered external control double loop Download PDFInfo
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- CN103939631B CN103939631B CN201410168193.1A CN201410168193A CN103939631B CN 103939631 B CN103939631 B CN 103939631B CN 201410168193 A CN201410168193 A CN 201410168193A CN 103939631 B CN103939631 B CN 103939631B
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- valve
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- powered
- fluid cylinder
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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
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/02—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing faces; Packings therefor
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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
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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
- F16K31/1221—Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston one side of the piston being spring-loaded
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Fluid-Driven Valves (AREA)
Abstract
The present invention relates to the safe gate valve in a kind of self-powered external control double loop, comprise valve body and the valve gap being arranged on valve body upper end, the both sides being positioned at valve pocket in valve body are provided with valve seat groove, in valve seat groove, valve seat is installed, between two valve seats, is provided with valve plate, the upper end fixed installation lower valve rod of valve plate, lower valve rod is fixedly connected with upper valve rod through valve gap mesopore, upper valve rod overcoat has the fluid cylinder of mouth down, and in the outlet of the lower end of fluid cylinder, be provided with the piston be arranged on upper valve rod, piston is connected with valve gap by elastic reset assembly; The side of fluid cylinder is communicated with the fluid inlet of gate valve by the self-powered loop of the first electromagnetic valve, and opposite side is connected with hydraulic control system by the external control loop of the second electromagnetic valve, and first, second solenoid valve is by control box control switch.Advantage of the present invention is reasonable in design, is skillfully constructed, and adopt flowing medium self-powered to control and hydraulic oil external control two kinds of loop designs, handling safety is convenient, energy saving.
Description
Technical field
The present invention relates to one to surge safe gate valve, the safe gate valve in especially a kind of self-powered external control double loop.
Background technique
Flap type is widely used in the fields such as oil, rock gas and chemical industry, in order to switch on or off pipeline medium.At present, the on-off mode of flap type has manually, surge and pneumatic three kinds of modes, wherein hand switch mode is subject to the impact of moment factor, there is switch motion slow, the shortcomings such as switching time is long, and surge or jettron mode to have switch motion timely, switching time is short, remote controlled, the advantages such as handling safety, but pneumatic valve is subject to the pressure fluctuations of compressed air, and low temperature condition can cause drive part to freeze, be failure to actuate, and wet environment can make source of the gas band water, affect pneumatic valve and use.The switch of existing hydraulic operated valve is all controlled by double-acting hydraulic cylinder, not only need longer time throttle down, and require higher to hydraulic control system, if hydraulic system failure, valve just can not be closed in time, needs manually-operable throttle down, consuming time longer, and because hydraulic control system is comparatively complicated, installation and maintenance bother, and cost is higher.
Summary of the invention
The object of the invention is to: for above-mentioned prior art Problems existing, the safe gate valve in a kind of self-powered external control double loop is proposed, employing double loop is designed, both realize valve self-powered by fluid self-powered loop to open, valve is opened again by Remote Hydraulic control loop, handling safety is convenient, valve switch excellent performance, energy-conserving and environment-protective.
In order to reach above object, the safe gate valve in self-powered external control double loop of the present invention, comprise valve body and be arranged on the valve gap of valve body upper end by bolt, the both sides being positioned at valve pocket in valve body are provided with valve seat groove, in valve seat groove, valve seat is installed, valve plate is provided with between two valve seats, the upper end fixed installation lower valve rod of valve plate, its improvements are, lower valve rod is fixedly connected with upper valve rod through valve gap mesopore, upper valve rod overcoat has the fluid cylinder of mouth down, and in the outlet of the lower end of fluid cylinder, be provided with the piston be arranged on upper valve rod, piston is connected with valve gap by elastic reset assembly; The side of fluid cylinder is communicated with the fluid inlet of gate valve by the self-powered loop of the first electromagnetic valve, and opposite side is connected with hydraulic control system by the external control loop of the second electromagnetic valve, and first, second solenoid valve described is by control box control switch; Described gate valve has flowing medium self-powered state of a control and hydraulic oil external control state; When being in flowing medium self-powered state of a control, described first solenoid valve is in the form starting self-powered loop, and described second solenoid valve is in the form of cutting out external control loop; When being in hydraulic oil external control state, described first solenoid valve is in the form of cutting out self-powered loop, and described second solenoid valve is in the form starting external control loop, and described hydraulic control system is in the form to automatic control loop fuel feeding.In summary, gate valve has two kinds of control loops, one is fluid self-powered loop, realize gate valve by driving fluid to open, another kind is hydraulic oil drive circuit, open valve by remote hydraulic control system, these two kinds of loops are switched by first, second solenoid valve of switch.
Preferably, the signal input part of control box is connected with the pressure transducer being arranged on fluid inlet, and control output end is connected with first, second solenoid valve and hydraulic control system.
Preferably, the upper end of valve plate is shaped with the first inserting groove, and the lower end of lower valve rod is arranged in the first inserting groove, and is shaped with pin-and-hole at lower valve rod and the first inserting groove joint, coordinates be provided with locating stud with pin-and-hole.The upper end of lower valve rod is shaped with tapped second inserting groove, be inserted with lower end in second inserting groove and there is externally threaded upper valve rod, upper and lower threaded stem is connected, and upper valve rod is positioned at above the second inserting groove and is provided with nut, and is provided with lock screw with upper valve rod joint on nut.
Preferred further, between the step that piston is arranged on upper valve rod bottom and nut, and with step and nut location, between nut and piston, be also provided with packing ring.
Preferred further again, elastic reset assembly comprises spring seat and is arranged on the Returnning spring in spring seat, the upper end of spring seat is fixedly mounted in the outlet of fluid cylinder, lower end is fixedly connected with valve gap, and the spring chamber that the upper and lower valve rod of tolerable passes through is shaped with in the inside of spring seat, the inwall of spring chamber is provided with spring fitting groove, and the upper end of spring is fixedly connected with the lower end surface of piston, and lower end is fixed in spring fitting groove.The upper end of spring seat is shaped with the outside thread be connected with the screw-internal thread fit being positioned at fluid cylinder opening inner side, spring seat is threaded with fluid cylinder, lower end is shaped with the internal thread be connected with the outside thread of valve gap upper end, spring seat is threaded with valve gap, and is also respectively equipped with lock screw in the upper end of spring seat and fluid cylinder joint and lower end and valve gap joint.When opening gate valve, spring is by piston compression in the inner chamber of spring seat, and such gate valve is closed and just realized by Returnning spring, improves the switch performance of gate valve, to ensure that site safety is produced, has saved the energy.
Further preferred, the one end in self-powered loop is connected with valve body screw thread by pipe nipple, the first mounting hole grafting on the other end and fluid cylinder sidewall, pipe nipple is communicated with the fluid inlet of gate valve by being arranged on the pipeline on valve body, and the first mounting hole penetrates fluid cylinder sidewall is communicated with fluid cylinder inside; One end of external control loop is fixedly connected with valve gap by the link that cross section is L shape, the second mounting hole grafting on the other end and fluid cylinder sidewall, and the second mounting hole penetrates fluid cylinder sidewall is communicated with fluid cylinder inside.The one end in self-powered loop is shaped with the outside thread be connected with the screw-internal thread fit being positioned at the first mounting hole, and self-powered loop is threaded with fluid cylinder; The minor face of L shape link be fixed on be positioned at external control loop one end steering knuckle on, long limit is connected with valve gap by bolt, steering knuckle is communicated with the hydraulic oil output pipe of hydraulic control system, the other end of external control loop is shaped with the outside thread be connected with the screw-internal thread fit being positioned at the second mounting hole, and external control loop is threaded with fluid cylinder.
Further preferred, the upper end of fluid cylinder is provided with the fixed base that can be socketed limited cap, and the inside of fixed base is provided with the valve pocket that tolerable upper valve rod passes through; The upper end of fixed base is provided with fluid cylinder lid, and is provided with seal ring in the valve pocket of fixed base; The outer wall of fixed base is shaped with the outside thread with the screw-internal thread fit of limited cap, by internal and external screw thread, limited cap is socketed on fixed base.
The invention has the advantages that: the safe gate valve in self-powered external control double loop of the present invention is reasonable in design, be skillfully constructed, flowing medium self-powered is adopted to control and hydraulic oil external control two kinds of loop designs, borehole fluid pressure can be utilized to open gate valve voluntarily, hydraulic control system can be utilized to open gate valve from outside again, handling safety is convenient, not only there is the superior function of quick, reliable switch gate valve, also a saving the energy, hydraulic pressure cavity and spring chamber separate design simultaneously, when gate valve is opened, spring is compressed in spring chamber, reduces the whole height of safety valve.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, invention is further described.
Fig. 1 is the structural representation of the embodiment of the present invention one.
Fig. 2 is self-powered loop works schematic diagram.
Fig. 3 is external control loop operating diagram.
Fig. 4 is principle of the invention figure.
1. valve bodies, 2. valve plate, 3. valve seat, 4. locating stud in figure, 5. lower valve rod, 6. valve gap, 7. spring seat, 8. spring, 9. nut, 10. piston, 11. upper valve rods, 12. fluid cylinders, 13. limited caps, 14. self-powered loops, 15. external control loops, 16. first solenoid valves, 17. second solenoid valves, 18. fixed bases, 19. packing rings, 20. lock screws, 21. links, 22 pipe nipples, 23, passage.
Embodiment
Embodiment one
The safe gate valve in self-powered external control double loop of the present embodiment, its structure as shown in Figure 1, comprise valve body 1 and be arranged on the valve gap 6 of valve body 1 upper end by bolt, the both sides being positioned at valve pocket in valve body 1 are provided with valve seat groove, in valve seat groove, valve seat 3 is installed, valve plate 2 is provided with between two valve seats, the upper end of valve plate 2 is shaped with the first inserting groove, the lower end of lower valve rod 5 is arranged in the first inserting groove, and be shaped with pin-and-hole at lower valve rod 5 and the first inserting groove joint, coordinate with pin-and-hole and be provided with locating stud 4, by locating stud 4, lower valve rod 5 is fixedly mounted on the upper end of valve plate 2.The upper end of lower valve rod 5 is shaped with tapped second inserting groove, be inserted with lower end in second inserting groove and there is externally threaded upper valve rod 11, lower valve rod 5 is threaded with upper valve rod 11 through valve gap 6 mesopore, and be positioned on upper valve rod 11 above second inserting groove and be provided with nut 9, and be provided with lock screw 20 in nut 9 and upper valve rod 11 joint.In addition, upper valve rod 11 overcoat has the fluid cylinder 12 of mouth down, the upper end of fluid cylinder 12 is provided with the fixed base 18 that can be socketed limited cap 13, the outer wall of wherein fixed base 18 is shaped with the outside thread with the screw-internal thread fit of limited cap 13, by interior, outside thread makes limited cap 13 be socketed on fixed base 18, and have pin-and-hole in the upper end of limited cap 13, coordinate with pin-and-hole and be provided with stop pin, limited cap 13 and fixed base 18 can be fixed further by installing stop pin, the upper end of fixed base 18 is also provided with fluid cylinder lid, the inside of fixed base 18 is provided with the valve pocket that tolerable upper valve rod 11 passes through, and seal ring is provided with in the valve pocket of fixed base 18.The piston 10 be arranged on upper valve rod 11 is provided with in the outlet of the lower end of fluid cylinder 12, between the step that piston 10 is arranged on upper valve rod 11 bottom and nut 9, and locate with this step and nut 9, packing ring 19 is also provided with between nut 9 and piston 10, piston 10 is connected with valve gap 6 by elastic reset assembly, and the side of fluid cylinder 12 is provided with the self-powered loop 14 of the first solenoid valve 16 control switch, opposite side is provided with the external control loop 15 of the second solenoid valve 17 control switch, first, second solenoid valve 16, 17 are connected with the control output end of control box, the signal input part of control box is connected with the pressure transducer be arranged in gate valve fluid inlet, pressure transducer is for measuring gate valve fluid pressure value.In addition, gate valve has flowing medium self-powered and controls and hydraulic oil external control two states, and when being in flowing medium self-powered state of a control, the first solenoid valve 16 is in the form starting self-powered loop 14, and the second solenoid valve 17 is in the form of cutting out external control loop 15; When being in hydraulic oil external control state, the first solenoid valve 16 is in the form of cutting out self-powered loop 14, and the second solenoid valve 17 is in the form starting external control loop 15, and hydraulic control system is in the form to automatic control loop fuel feeding.
The Returnning spring 8 that elastic reset assembly comprises spring seat 7 and is arranged in spring seat 7, the upper end of spring seat 7 is fixedly mounted in the outlet of fluid cylinder 12, lower end is fixedly connected with valve gap 6, and the spring chamber that the upper and lower valve rod 5,11 of tolerable passes through is shaped with in the inside of spring seat 7, the inwall of spring chamber is provided with spring fitting groove, the upper end of spring 8 is fixedly connected with the lower end surface of piston 10, and lower end is fixed in spring fitting groove.Specifically, the upper end of spring seat 7 is shaped with the outside thread be connected with the screw-internal thread fit being positioned at fluid cylinder 12 opening inner side, spring seat 7 is threaded with fluid cylinder 12, lower end is shaped with the internal thread be connected with the outside thread of valve gap 6 upper end, spring seat 7 is threaded with valve gap 6, and is also respectively equipped with lock screw 20 in the upper end of spring seat 7 and fluid cylinder 12 joint and its lower end and valve gap 6 joint.When opening this gate valve, spring 8 is compressed in the spring chamber of spring seat 7 by piston 10, and spring 8 resets and gate valve just can be driven to close.
Self-powered loop 14 is the pipeline of transport borehole fluid, installation first solenoid valve 16 on it, one end of this pipeline is threaded with valve body 1 by pipe nipple 22, the first mounting hole grafting on the other end and fluid cylinder 12 sidewall, pipe nipple 22 is communicated with the fluid inlet of gate valve by the pipeline 23 be arranged on valve body, and the first mounting hole penetrates fluid cylinder 12 sidewall and is communicated with fluid cylinder 12 inside.The inwall of wherein the first mounting hole is shaped with internal thread, and the one end in self-powered loop 14 is shaped with the outside thread be connected with this screw-internal thread fit, and self-powered loop 14 is threaded with fluid cylinder 12.External control loop 15 is hydraulic oil transport pipeline, installation second solenoid valve 17 on it, one end of this pipeline is fixedly connected with valve gap 6 by the link 21 that cross section is L shape, the second mounting hole grafting on the other end and fluid cylinder 12 sidewall, and the second mounting hole penetrates fluid cylinder 12 sidewall is communicated with fluid cylinder 12 inside.Wherein the minor face of L shape link 21 be fixed on be positioned at external control loop 15 one end steering knuckle on, long limit is connected with valve gap 6 by bolt, the inwall of the second mounting hole is shaped with internal thread, and the other end of external control loop 15 is shaped with the outside thread be connected with this screw-internal thread fit, external control loop 15 is threaded with fluid cylinder 12.In addition, external control loop 15 is communicated with the hydraulic oil output pipe of hydraulic control system by steering knuckle 23, wherein hydraulic control system comprises motor and by motor-driven oil pump, oil delivery side of pump is communicated with external control loop by hydraulic oil output pipe, import is communicated with hydraulic oil container by hydraulic oil intake line, and motor is connected with the control output end of control box.
During work, as shown in Figures 2 to 4, in order to ensure that valve works under the poroid state of all-pass, a force value is preset for gate valve fluid pressure, pressure transducer detects the fluid medium pressure of gate valve inlet, and this testing signal is passed to control box, control box is through process, judge that the force value detected is more than or equal to predefined value, now control box controls to start the first solenoid valve 16 on self-powered loop 14, second solenoid valve 17 is in normally off and hydraulic control system is in closed condition, borehole fluid medium is made to enter hydraulic pressure cavity through self-powered loop 14, driven plunger 10 moves downward, and drive upper valve rod 5, lower valve rod 11 and valve plate 2 move downward, open gate valve, because external control loop 15 is closed in fluid driving process, borehole fluid medium just cannot enter and destroy hydraulic control system.When control box judges that detected pressures value is less than predefined value, external drive pressure need be opened, control box controls the first solenoid valve 16 and cuts out, and the second solenoid valve 17 is opened, and primer fluid pressure control system, the hydraulic oil of hydraulic control system enters hydraulic pressure cavity through external control loop 15, and driven plunger 10 moves downward, and then drive upper valve rod 5, lower valve rod 11 and valve plate 2 to move downward, open gate valve, now self-powered loop 14 is closed, avoids hydraulic oil and enters in well through self-powered loop 14 and cause waste.Hydraulic oil control loop can be used as the alternative of self-powered loop 14, when self-powered loop 14 can not use, can guarantee that gate valve is opened.In addition, in gate valve opening procedure, piston 10 move downward compressible spring 8, make in its spring chamber being reduced to spring seat 7, then spring 8 reset drives piston 10 moves upward, and then drives upper valve rod 11, lower valve rod 5 and valve plate 2 also to move upward, throttle down.If gate valve needs to be in open mode for a long time, can on the top fitting seat 18 of fluid cylinder 12 mounting limit cap 13, for lock stem structure and venting outer liquid pressure with reach locking gate valve object, avoid occurring that the gate valve caused due to borehole pressure instability damages phenomenon, when gate valve needs to close, removed by limited cap 13, spring 8 moves upward under the effect of restoring force, drive piston 10, upper valve rod 11, lower valve rod 5 and valve plate 2 to move upward, with closing gate valve simultaneously.
In addition to the implementation, the present invention also can have other mode of executions.All employings are equal to the technological scheme of replacement or equivalent transformation formation, drop on the protection domain of application claims.
Claims (9)
1. the safe gate valve in self-powered external control double loop, comprise valve body and the valve gap being arranged on valve body upper end, the both sides being positioned at valve pocket in described valve body are provided with valve seat groove, in described valve seat groove, valve seat is installed, valve plate is provided with between two valve seats, the upper end fixed installation lower valve rod of described valve plate, it is characterized in that: described lower valve rod is fixedly connected with upper valve rod through valve gap mesopore, described upper valve rod overcoat has the fluid cylinder of mouth down, be provided with the piston be arranged on upper valve rod in the outlet of described fluid cylinder, described piston is connected with valve gap by elastic reset assembly; The side of described fluid cylinder is communicated with the fluid inlet of gate valve by the self-powered loop of the first electromagnetic valve, and opposite side is connected with hydraulic control system by the external control loop of the second electromagnetic valve, and first, second solenoid valve described is by control box control switch; Described gate valve has flowing medium self-powered state of a control and hydraulic oil external control state; When being in flowing medium self-powered state of a control, described first solenoid valve is in the form starting self-powered loop, and described second solenoid valve is in the form of cutting out external control loop; When being in hydraulic oil external control state, described first solenoid valve is in the form of cutting out self-powered loop, and described second solenoid valve is in the form starting external control loop, and described hydraulic control system is in the form to automatic control loop fuel feeding; The signal input part of described control box is connected with the pressure transducer being arranged on fluid inlet, and control output end is connected with first, second solenoid valve and hydraulic control system.
2. the safe gate valve in self-powered external control double loop according to claim 1, it is characterized in that: the upper end of described valve plate is shaped with the first inserting groove, the lower end of described lower valve rod is arranged in the first inserting groove, and be shaped with pin-and-hole at described lower valve rod and the first inserting groove joint, coordinate with described pin-and-hole and be provided with locating stud.
3. the safe gate valve in self-powered external control double loop according to claim 2, it is characterized in that: the upper end of described lower valve rod is shaped with tapped second inserting groove, be inserted with lower end in described second inserting groove and there is externally threaded upper valve rod, described upper valve rod is positioned at above the second inserting groove and is provided with nut, and is provided with lock screw with upper valve rod joint on described nut.
4. the safe gate valve in self-powered external control double loop according to claim 3, is characterized in that: between the step that described piston is arranged on upper valve rod bottom and nut, and be also provided with packing ring between described nut and piston.
5. the safe gate valve in self-powered external control double loop according to claim 1, it is characterized in that: described elastic reset assembly comprises spring seat and is arranged on the Returnning spring in spring seat, the upper end of described spring seat is fixedly mounted in the outlet of fluid cylinder, lower end is fixedly connected with valve gap, and the spring chamber that the upper and lower valve rod of tolerable passes through is shaped with in the inside of described spring seat, the inwall of described spring chamber is provided with spring fitting groove, the upper end of described spring is fixedly connected with the lower end surface of piston, and lower end is fixed in spring fitting groove.
6. the safe gate valve in self-powered external control double loop according to claim 5, it is characterized in that: the upper end of described spring seat is shaped with the outside thread be connected with the screw-internal thread fit being positioned at fluid cylinder opening inner side, lower end is shaped with the internal thread be connected with the outside thread of valve gap upper end, and is also respectively equipped with lock screw in the upper end of described spring seat and fluid cylinder joint and lower end and valve gap joint.
7. the safe gate valve in self-powered external control double loop according to claim 1, it is characterized in that: the one end in described self-powered loop is connected with valve body screw thread by pipe nipple, the first mounting hole grafting on the other end and fluid cylinder sidewall, described pipe nipple is communicated with the fluid inlet of gate valve by being arranged on the pipeline on valve body, and the first mounting hole penetrates fluid cylinder sidewall and fluid cylinder inside is communicated with; One end of described external control loop is fixedly connected with valve gap by the link that cross section is L shape, the second mounting hole grafting on the other end and fluid cylinder sidewall, and the second mounting hole penetrates fluid cylinder sidewall is communicated with fluid cylinder inside.
8. the safe gate valve in self-powered external control double loop according to claim 7, is characterized in that: the one end in described self-powered loop is shaped with the outside thread be connected with the screw-internal thread fit being positioned at the first mounting hole; The minor face of described L shape link is fixed on and is positioned on the steering knuckle of external control loop one end, long limit is connected with valve gap by bolt, described steering knuckle is communicated with the hydraulic oil output pipe of hydraulic control system, and the other end of described external control loop is shaped with the outside thread be connected with the screw-internal thread fit being positioned at the second mounting hole.
9. the safe gate valve in self-powered external control double loop according to claim 1, is characterized in that: the upper end of described fluid cylinder is provided with the fixed base that can be socketed limited cap, and the inside of described fixed base is provided with the valve pocket that tolerable upper valve rod passes through; The upper end of described fixed base is provided with fluid cylinder lid, and is provided with seal ring in the valve pocket of described fixed base; The outer wall of described fixed base is shaped with the outside thread with the screw-internal thread fit of limited cap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410168193.1A CN103939631B (en) | 2014-04-24 | 2014-04-24 | The safe gate valve in self-powered external control double loop |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410168193.1A CN103939631B (en) | 2014-04-24 | 2014-04-24 | The safe gate valve in self-powered external control double loop |
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| CN103939631A CN103939631A (en) | 2014-07-23 |
| CN103939631B true CN103939631B (en) | 2016-03-30 |
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| CN201410168193.1A Active CN103939631B (en) | 2014-04-24 | 2014-04-24 | The safe gate valve in self-powered external control double loop |
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| CN106855129A (en) * | 2015-12-09 | 2017-06-16 | 王翔 | A kind of hydraulic sluice valve |
| CN106481830B (en) * | 2016-11-16 | 2019-03-29 | 江苏科技大学 | A kind of hydraulic underwater gate valve of high reliability |
| CN108692046B (en) * | 2018-07-02 | 2019-09-06 | 长沙理工大学 | A kind of Double-wing-plate supports by force decompression gate valve |
| CN108533557B (en) * | 2018-07-02 | 2019-09-06 | 长沙理工大学 | A kind of control pressurer system |
| CN108757969B (en) * | 2018-07-02 | 2019-09-06 | 长沙理工大学 | A kind of Double-wing-plate supports by force the O&M method of decompression gate valve |
| CN109139947B (en) * | 2018-09-19 | 2023-11-17 | 江苏金石机械集团有限公司 | Non-penetrating hydraulic valve piston device |
| CN109237062B (en) * | 2018-11-27 | 2024-04-26 | 美钻深海能源科技研发（上海）有限公司 | Hydraulic gate valve easy to debug |
| CN110307202A (en) * | 2019-08-13 | 2019-10-08 | 湖北拓宇水电科技股份有限公司 | Hydraulic spring grease cup energy storage type power station air admission valve |
| CN112303293B (en) * | 2020-11-17 | 2022-01-07 | 自贡自高阀门有限公司 | Three-way fluid control valve |
| CN113494621A (en) * | 2021-07-30 | 2021-10-12 | 欧冠阀门科技有限公司 | Gate valve convenient to open and close |
| CN114534137A (en) * | 2022-02-28 | 2022-05-27 | 李斯特测试设备(上海)有限公司 | Vehicle-mounted power battery fire extinguishing device and system |
| CN115929962B (en) * | 2023-01-05 | 2023-05-26 | 无锡斯考尔自动控制设备有限公司 | Emergency cut-off valve |
| CN117685383B (en) * | 2024-02-04 | 2024-04-09 | 什邡慧丰采油机械有限责任公司 | 175MPa high pressure resistant flat valve capable of being opened and closed rapidly |
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| US3958592A (en) * | 1974-02-06 | 1976-05-25 | Willis Oil Tool Co. | Safety shut-off valve |
| US4585207A (en) * | 1985-09-03 | 1986-04-29 | Joy Manufacturing Company | Expanding gate valve with pneumatic actuator |
| CN1070998C (en) * | 1996-02-09 | 2001-09-12 | 王虎儒 | Hand-operated pneumatic hydraulic electric storm driven valve |
| CN201747324U (en) * | 2010-07-30 | 2011-02-16 | 金湖金石阀业有限公司 | Hydraulic actuator for valve |
| CN202195087U (en) * | 2011-08-28 | 2012-04-18 | 张俊中 | Self-locking anti-crack flat gate valve |
| CN203463715U (en) * | 2013-07-29 | 2014-03-05 | 上海申吉仪表有限公司 | Pneumatic and manual transformable three-way control valve |
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