CN104148772B - A kind of fluid-tight fast shut-off method and shearing device - Google Patents
A kind of fluid-tight fast shut-off method and shearing device Download PDFInfo
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- CN104148772B CN104148772B CN201410370935.9A CN201410370935A CN104148772B CN 104148772 B CN104148772 B CN 104148772B CN 201410370935 A CN201410370935 A CN 201410370935A CN 104148772 B CN104148772 B CN 104148772B
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- fluid
- tight
- control valve
- tight case
- liquid tank
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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
- F16K13/00—Other constructional types of cut-off apparatus; Arrangements for cutting-off
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/02—Pipe-line systems for gases or vapours
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D3/00—Arrangements for supervising or controlling working operations
- F17D3/01—Arrangements for supervising or controlling working operations for controlling, signalling, or supervising the conveyance of a product
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Pipe Accessories (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The present invention relates to a kind of fluid-tight fast shut-off method and shearing device,, damp medium flammable for low pressure is quickly, reliably cut off, including: admission line (1), fluid-tight case (2), dividing plate (3), liquid injecting pipeline (4), note hydraulic control valve (5), reserving liquid tank (7), outlet pipe (8), reserving liquid tank (7) bottom is connected with liquid injecting pipeline (4)；Liquid injecting pipeline (4) is connected with fluid-tight case (2) middle part；Liquid injecting pipeline (4) is provided with note hydraulic control valve (5), controls reserving liquid tank (7) to fluid-tight case (2) interior fluid injection。When fluid-tight quick cutting device obtains shutdown signal, note hydraulic control valve (5) is opened, working solution (10) is rapidly injected fluid-tight case (2) by reserving liquid tank (7) by liquid injecting pipeline (4), it is achieved the fast shut-off of conveyance conduit。It is an advantage of the current invention that cut off rapidly media flow with working solution and avoid the friction in shearing device and shock to be likely to the harm to medium, can guarantee that cut-out zero leakage。
Description
Technical field
The invention belongs to shearing device technical field, relate to a kind of fluid-tight fast shut-off method and shearing device, particularly relate to a kind of for low pressure combustibility, the damp medium cutting-off method cut off quick, reliable and shearing device, in case of emergency can cut off rapidly media flow with working solution and avoid the friction in shearing device and shock to be likely to the harm to medium, can guarantee that shearing device zero leakage。
Background technology
Conventional quick cutting device adopts electric and pneumatic actuator driven solid flap quickly to move, block medium channel, thus reaching to cut off the purpose of media flow。But, solid flap rapid movement, put in place after stop process in, inevitably with between the cavity of shearing device exist friction or clash into；During particularly in shearing device fault, friction, shock between flap and shearing device cavity are likely to very violent。This is a kind of potential safety hazard for flammable medium, especially explosive medium。It addition, no matter contact how tight between flap and shearing device cavity, life-time service be deformed and by the contaminating impurity in medium after, shearing device all cannot avoid leakage problem completely。For solve leakage problem, partial cut device adopt fluid-tight seal, namely after flap puts in place in valve body filling liquid, it is achieved that shearing device zero leakage。But existing fluid-tight shearing device maybe cannot realize fast shut-off, the friction between cavity and flap, Impact Problems maybe cannot be solved during fast shut-off。
Summary of the invention
For overcoming existing quick cutting device function, the disadvantages mentioned above of structure and deficiency, it is an object of the invention to: a kind of fluid-tight quick cutting device and cutting-off method are provided, fast and reliable flammable suitable in low pressure, damp medium is cut off, liquid medium (working solution) is adopted to replace the solid flap rapid occlusion medium channel of traditional valve, it is possible not only to realize in emergency circumstances cutting off rapidly media flow, and it can be avoided that friction or shock in valve body are likely to the harm to gas medium, can guarantee that shearing device zero leakage simultaneously。
In terms of existing technologies, the innovative point of the present invention is in that: 1, be provided with the reserving liquid tank below fluid-tight case in shearing device, reserving liquid tank is connected to supercharging equipment, when needing to cut off the medium flowing through shearing device, open supercharging equipment and the note hydraulic control valve connected with reserving liquid tank, working solution in reserving liquid tank injects fluid-tight case by liquid injecting pipeline under the effect of the pressure, medium is blocked with working solution, flow process does not rub in shearing device and clashes into, it is ensured that being perfectly safe of flow media flammable, explosive；2, supercharging equipment includes boost electromagnetic valve and pressurization air source, closes in shearing device process to the working solution supercharging in reserving liquid tank, makes working solution be rapidly injected fluid-tight case under pressure, it is achieved fast shut-off function；3, the working solution of fluid-tight case and the interior filling of reserving liquid tank can be anti-icing fluid, liquid metal etc., it is to avoid fluid-tight shearing device freezed in winter, it is ensured that normally use under severe cold condition。
Specifically, according to an aspect of the present invention, the present invention solves its technical problem, it is provided that a kind of fluid-tight quick cutting device, specifically adopt the technical scheme that:
A kind of fluid-tight quick cutting device, including fluid-tight case and reserving liquid tank, it is characterized in that: near side, described fluid-tight box top is provided with admission line, opposite side is provided with outlet pipe, described fluid-tight case is provided with the first dividing plate, the roof of described first dividing plate and fluid-tight case and sidewall is tightly connected and leaves gap between the diapire of fluid-tight case, and described admission line and outlet pipe set up separately in the both sides of described first dividing plate；Described fluid-tight case be connected with reserving liquid tank, the bottom of described fluid-tight case is provided with the Drainage pipe that the top board with described reserving liquid tank connects, described Drainage pipe is provided with row's hydraulic control valve, the liquid injecting pipeline being provided with bottom described reserving liquid tank and connect in the middle part of fluid-tight case, described liquid injecting pipeline is provided with note hydraulic control valve；Described reserving liquid tank top is provided with supercharging equipment。
Preferably, described supercharging equipment includes supercharger control valve and pressurization air source。Described supercharging equipment, in order to control the pressure in increase reserving liquid tank, improves the reserving liquid tank fluid injection speed to fluid-tight case；Preferably, described pressurization air source is be equipped with the nitrogen cylinder of air relief valve, compressed air piping or air compressor machine etc.。
Preferably, described note hydraulic control valve, row's hydraulic control valve, supercharger control valve are electromagnetic valve。
Preferably, except the first dividing plate, it is additionally provided with several dividing plates in described fluid-tight case, these dividing plate interlaced arrangement are in described fluid-tight case, or be tightly connected with the diapire of described fluid-tight case, or be tightly connected with the roof of described fluid-tight case, and be all tightly connected with the sidewall of described fluid-tight case, fluid-tight case is separated into labyrinth shape passage。
The fluid-tight quick cutting device of the present invention is when opening, and fill duty liquid in reserving liquid tank, note hydraulic control valve is closed, and without working solution in fluid-tight case, gas medium is along labyrinth shape passage proper flow；When needs cut off gas medium, open note hydraulic control valve and supercharger control valve, working solution in reserving liquid tank is rapidly injected fluid-tight case by liquid injecting pipeline under the pressure effect of pressurization air source, and working solution blocks fluid-tight lower box part labyrinth shape passage, blocks gas medium flowing；Gas medium flowing closes note hydraulic control valve and supercharger control valve after blocking。When needing to open fluid-tight quick cutting device, the row's of unlatching hydraulic control valve, the working solution in fluid-tight case is discharged from Drainage pipe under gravity, and refills reserving liquid tank；After working solution in fluid-tight case is discharged, hydraulic control valve is arranged in closedown。
Preferably, the working solution of described fluid-tight case and the interior filling of reserving liquid tank can be anti-icing fluid, liquid metal etc., it is to avoid fluid-tight shearing device freezed in winter, it is ensured that normally use under severe cold condition。
Preferably, in the height of fluid-tight case, the height of dividing plate and fluid-tight case, the liquid level of working solution is adjustable, by adjusting the height of liquid level in the height of fluid-tight case, the height of dividing plate and fluid-tight case, it is possible to be conveniently adjusted, set the operating pressure of shearing device。
Preferably, described fluid-tight quick cutting device also includes the liquidometer being installed on fluid-tight case and reserving liquid tank respectively, for the duty of field observation quick cutting device。
Preferably, described fluid-tight quick cutting device also includes the liquid level sensor being installed on fluid-tight case and reserving liquid tank, in order to remotely to monitor shearing device duty。
Preferably, it is close to the dividing plate of described outlet pipe, and is provided with air distribution plate between the sidewall of described fluid-tight case, for the flowing gaseous medium through air distribution plate is evenly distributed, it is to avoid working solution is taken away by flowing gaseous medium。Further, the position of described first dividing plate bottom close with between adjacent dividing plate also is provided with air distribution plate。
Preferably, described fluid-tight quick cutting device also includes control unit, communicates to connect with each sensor and each control valve respectively。
In actual applications, when air delivering pipeline system needs fast shut-off such as downstream unit catastrophic failure, for ensureing the safety of equipment, it is possible to arrange the fluid-tight quick cutting device of the present invention on gas transmission main pipeline。When fluid-tight quick cutting device obtains shutdown signal, control unit controls note hydraulic control valve and opens, and working solution is rapidly injected fluid-tight case by reserving liquid tank by liquid injecting pipeline, it is achieved the working solution fast shut-off to conveyance conduit。Imflammable gas is dependent on working solution and cuts off, and therefore this shearing device is it can be avoided that friction in shearing device and shock, it is achieved safety cut-off。After working solution fills fluid-tight case, gas medium flowing is blocked completely, it is achieved shearing device zero leakage。Computer remote monitoring shearing device duty can be realized by liquid level sensor。
According to a further aspect in the invention, a kind of fluid-tight fast shut-off method is additionally provided, it is characterised in that described method includes,
--near side, fluid-tight box top arranges admission line, opposite side arranges outlet pipe, described fluid-tight case arranges the first dividing plate, the roof of described first dividing plate and fluid-tight case and sidewall is tightly connected and leaves gap between the diapire of fluid-tight case, and described admission line and outlet pipe set up separately in the both sides of described first dividing plate；
--it is arranged below reserving liquid tank at described fluid-tight case, the bottom of described fluid-tight case arranges the Drainage pipe connected with the top board of described reserving liquid tank, the row's of setting hydraulic control valve on described Drainage pipe, arrange and the liquid injecting pipeline connected in the middle part of fluid-tight case bottom described reserving liquid tank, described liquid injecting pipeline is installed note hydraulic control valve；Described reserving liquid tank top is provided with supercharging equipment；
--on fluid-tight case and reserving liquid tank, install liquid level sensor, in order to remotely to monitor shearing device duty；
--control unit is set, communicates to connect with each sensor and each control valve respectively；
When needs gas medium is normal through fluid-tight case, control unit opens row's hydraulic control valve, and the working solution in fluid-tight case is discharged from Drainage pipe under gravity, and refills reserving liquid tank；When needs cut off gas medium, control unit opens note hydraulic control valve and supercharger control valve, working solution in reserving liquid tank is rapidly injected fluid-tight case by liquid injecting pipeline under the pressure effect of pressurization air source, and working solution blocks fluid-tight lower box part labyrinth shape passage, blocks gas medium flowing；Gas medium flowing closes note hydraulic control valve and supercharger control valve after blocking。
Preferably, except the first dividing plate, it is additionally provided with several dividing plates in described fluid-tight case, these dividing plate interlaced arrangement are in described fluid-tight case, or be tightly connected with the diapire of described fluid-tight case, or be tightly connected with the roof of described fluid-tight case, and be all tightly connected with the sidewall of described fluid-tight case, fluid-tight case is separated into labyrinth shape passage。
Preferably, it is close to the dividing plate of described outlet pipe, and is provided with air distribution plate between the sidewall of described fluid-tight case, for the flowing gaseous medium through air distribution plate is evenly distributed, it is to avoid working solution is taken away by flowing gaseous medium。Further, the position of described first dividing plate bottom close with between adjacent dividing plate also is provided with air distribution plate。
Compare with tradition quick cutting device, it is an advantage of the current invention that:
1. use liquid working solution as the material of confining gas medium circulation passage, it is possible to definitely to avoid the friction in shearing device and shock to be likely to the harm to medium flammable, explosive；Supercharging equipment gives the working solution supercharging in reserving liquid tank in cutting out shearing device process, makes working solution be rapidly injected fluid-tight case under pressure, it is achieved fast shut-off function。
2. use liquid as encapsulant, can guarantee that shearing device zero leakage；
3. except the control valve controlling working solution flowing, without other executor and power-equipment, simple in construction, maintenance, easy to maintenance。
Accompanying drawing explanation
Fig. 1 is the structural representation of first embodiment of the invention。
Fig. 2 is the structural representation of second embodiment of the invention。
Wherein, admission line 1, fluid-tight case 2, dividing plate 3, liquid injecting pipeline 4, note hydraulic control valve 5, liquidometer 6, reserving liquid tank 7, outlet pipe 8, liquid level sensor 9, working solution 10, air distribution plate 11, row hydraulic control valve 12, supercharger control valve 13, pressurization air source 14。
Detailed description of the invention
For making the purpose of the present invention, technical scheme and advantage clearly understand, developing simultaneously embodiment referring to accompanying drawing, the present invention is described in more detail。
Fig. 1 is the first embodiment of the present invention, the fluid-tight quick cutting device of the present invention, including fluid-tight case 2 and reserving liquid tank 7, near described fluid-tight case 2 top side is provided with admission line 1, opposite side is provided with outlet pipe 8, described fluid-tight case 2 is provided with the first dividing plate 3, the roof of described first dividing plate 3 and fluid-tight case 2 and sidewall is tightly connected and leaves gap between the diapire of fluid-tight case 2, and described admission line 1 and outlet pipe 8 set up separately in the both sides of described first dividing plate 3；Described fluid-tight case 2 be connected with reserving liquid tank 7, the bottom of described fluid-tight case 2 is provided with the Drainage pipe that the top board with described reserving liquid tank 7 connects, described Drainage pipe is provided with row's hydraulic control valve 12, it is provided with bottom described reserving liquid tank 7 and the liquid injecting pipeline 4 connected in the middle part of fluid-tight case 2, described liquid injecting pipeline 4 is provided with note hydraulic control valve 5；Described reserving liquid tank 7 top is provided with supercharging equipment。Supercharging equipment includes supercharger control valve 13 and pressurization air source 14。Supercharging equipment, in order to control the pressure in increase reserving liquid tank 7, improves the reserving liquid tank 7 fluid injection speed to fluid-tight case 2；Described pressurization air source 14 is be equipped with the nitrogen cylinder of air relief valve, compressed air piping or air compressor machine etc.。
Note hydraulic control valve 5, row's hydraulic control valve 12, supercharger control valve 13 all can be selected for electromagnetic valve。
When shearing device is opened, note hydraulic control valve 5 is closed, fill duty liquid 10 in reserving liquid tank 7, and without working solution 10 in fluid-tight case 2, imflammable gas medium enters fluid-tight case 2 by admission line 1, is flowed out by outlet pipe 8, medium proper flow after air distribution plate 11。When needing to cut off the medium flowing through shearing device, opening note hydraulic control valve 5 and supercharger control valve 13, the working solution 10 in reserving liquid tank 7 is rapidly injected fluid-tight case 2 by liquid injecting pipeline 4 under the pressure effect of pressurization air source 14, blocks gas medium flowing；It is then shut off note hydraulic control valve 5 and supercharger control valve 13。When being then turned on shearing device, the row's of unlatching hydraulic control valve 12, the working solution 10 in fluid-tight case 2 to be discharged from row's hydraulic control valve 12, and refills reserving liquid tank 7, gas medium recovers proper flow；The row's of being then shut off hydraulic control valve 12。Liquid level sensor 9 is used for controlling system remote monitoring shearing device duty。Glass-tube liquid level meter 6 is for field observation shearing device duty。
Fig. 2 is the second embodiment of the present invention, arranges three pieces of dividing plates 3 at fluid-tight case 2, and fluid-tight case 2 top is divided into three cavitys。The second embodiment of the present invention, shearing device operation principle is identical with the first embodiment of the present invention。When being characterized in that shearing device dissengaged positions of the second embodiment, is divided into three cavitys by fluid-tight case 2 top, it is possible to form double fluid-tight, and the liquid level discrepancy in elevation sum of double fluid-tight is gas medium pressure。The method producing multiple fluid-tight by increasing dividing plate can improve the operating pressure of fluid-tight shearing device。
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within the scope of the present invention。
Claims (12)
1. a fluid-tight quick cutting device, including fluid-tight case and reserving liquid tank, it is characterized in that: near side, described fluid-tight box top is provided with admission line, opposite side is provided with outlet pipe, described fluid-tight case is provided with the first dividing plate, the roof of described first dividing plate and fluid-tight case and sidewall is tightly connected and leaves gap between the diapire of fluid-tight case, and described admission line and outlet pipe set up separately in the both sides of described first dividing plate；Described fluid-tight case be connected with reserving liquid tank, the bottom of described fluid-tight case is provided with the Drainage pipe that the top board with described reserving liquid tank connects, described Drainage pipe is provided with row's hydraulic control valve, the liquid injecting pipeline being provided with bottom described reserving liquid tank and connect in the middle part of fluid-tight case, described liquid injecting pipeline is provided with note hydraulic control valve；Described reserving liquid tank top is provided with supercharging equipment, and described supercharging equipment includes supercharger control valve and pressurization air source；Described note hydraulic control valve, row's hydraulic control valve, supercharger control valve are electromagnetic valve；
Described fluid-tight quick cutting device is when opening, and fill duty liquid in described reserving liquid tank, described note hydraulic control valve is closed, and without working solution in described fluid-tight case, gas medium is along gas channel proper flow；When needs cut off gas medium, open described note hydraulic control valve and supercharger control valve, working solution in described reserving liquid tank is rapidly injected described fluid-tight case by described liquid injecting pipeline under the pressure effect of pressurization air source, and working solution blocks described fluid-tight lower box part gas channel, blocks gas medium flowing；Gas medium flowing closes described note hydraulic control valve and supercharger control valve after blocking；When fluid-tight quick cutting device opened by needs, open described row's hydraulic control valve, working solution in described fluid-tight case is discharged from described Drainage pipe under gravity, and refills described reserving liquid tank, and the working solution in described fluid-tight case closes described row's hydraulic control valve after discharging。
2. fluid-tight quick cutting device according to claim 1, it is characterized in that, except the first dividing plate, it is additionally provided with several dividing plates in described fluid-tight case, these dividing plate interlaced arrangement are in described fluid-tight case, or are tightly connected with the diapire of described fluid-tight case, or are tightly connected with the roof of described fluid-tight case, and be all tightly connected with the sidewall of described fluid-tight case, fluid-tight case is separated into labyrinth shape passage。
3. fluid-tight quick cutting device according to claim 1, it is characterised in that in described fluid-tight case and reserving liquid tank, the working solution of filling is anti-icing fluid or liquid metal。
4. the fluid-tight quick cutting device according to any of the above-described claim, it is characterized in that, in the height of fluid-tight case, the height of dividing plate and fluid-tight case, the liquid level of working solution is adjustable, by adjusting the height of liquid level in the height of fluid-tight case, the height of dividing plate and fluid-tight case, it is convenient to regulate, set the operating pressure of shearing device。
5. the fluid-tight quick cutting device according to any one of claims 1 to 3, it is characterised in that described fluid-tight quick cutting device also includes the liquidometer being installed on fluid-tight case and reserving liquid tank respectively, for the duty of field observation quick cutting device。
6. the fluid-tight quick cutting device according to any one of claims 1 to 3, it is characterised in that described fluid-tight quick cutting device also includes the liquid level sensor being installed on fluid-tight case and reserving liquid tank, in order to remotely to monitor shearing device duty。
7. the fluid-tight quick cutting device according to any one of claims 1 to 3, it is characterized in that, be close to the dividing plate of described outlet pipe, and be provided with air distribution plate between the sidewall of described fluid-tight case, for the flowing gaseous medium through air distribution plate is evenly distributed, it is to avoid working solution is taken away by flowing gaseous medium。
8. fluid-tight quick cutting device according to claim 2, it is characterised in that the position of described first dividing plate bottom close with between adjacent dividing plate also is provided with air distribution plate。
9. fluid-tight quick cutting device according to claim 6, it is characterised in that described fluid-tight quick cutting device also includes control unit, communicates to connect with each sensor and each control valve respectively。
10. a fluid-tight fast shut-off method, it is characterised in that described method includes,
--near side, fluid-tight box top arranges admission line, opposite side arranges outlet pipe, described fluid-tight case arranges the first dividing plate, the roof of described first dividing plate and fluid-tight case and sidewall is tightly connected and leaves gap between the diapire of fluid-tight case, and described admission line and outlet pipe set up separately in the both sides of described first dividing plate；
--it is arranged below reserving liquid tank at described fluid-tight case, the bottom of described fluid-tight case arranges the Drainage pipe connected with the top board of described reserving liquid tank, the row's of setting hydraulic control valve on described Drainage pipe, arrange and the liquid injecting pipeline connected in the middle part of fluid-tight case bottom described reserving liquid tank, described liquid injecting pipeline is installed note hydraulic control valve；Described reserving liquid tank top is provided with supercharging equipment；Described supercharging equipment includes supercharger control valve and pressurization air source；Described note hydraulic control valve, row's hydraulic control valve, supercharger control valve are electromagnetic valve；
--on fluid-tight case and reserving liquid tank, install liquid level sensor, in order to remotely to monitor shearing device duty；
--control unit is set, communicates to connect with each sensor and each control valve respectively；
When needs gas medium is normal through fluid-tight case, control unit opens row's hydraulic control valve, and the working solution in fluid-tight case is discharged from Drainage pipe under gravity, and refills reserving liquid tank；When needs cut off gas medium, control unit opens note hydraulic control valve and supercharger control valve, working solution in reserving liquid tank is rapidly injected fluid-tight case by liquid injecting pipeline under the pressure effect of pressurization air source, and working solution blocks fluid-tight lower box part labyrinth shape passage, blocks gas medium flowing；Gas medium flowing closes note hydraulic control valve and supercharger control valve after blocking。
11. fluid-tight fast shut-off method according to claim 10, it is characterized in that, except the first dividing plate, it is additionally provided with several dividing plates in described fluid-tight case, these dividing plate interlaced arrangement are in described fluid-tight case, or are tightly connected with the diapire of described fluid-tight case, or are tightly connected with the roof of described fluid-tight case, and be all tightly connected with the sidewall of described fluid-tight case, fluid-tight case is separated into labyrinth shape passage。
12. fluid-tight fast shut-off method according to claim 10, it is characterized in that, be close to the dividing plate of described outlet pipe, and be provided with air distribution plate between the sidewall of described fluid-tight case, for the flowing gaseous medium through air distribution plate is evenly distributed, it is to avoid working solution is taken away by flowing gaseous medium。
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410370935.9A CN104148772B (en) | 2014-07-30 | 2014-07-30 | A kind of fluid-tight fast shut-off method and shearing device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410370935.9A CN104148772B (en) | 2014-07-30 | 2014-07-30 | A kind of fluid-tight fast shut-off method and shearing device |
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| CN104148772A CN104148772A (en) | 2014-11-19 |
| CN104148772B true CN104148772B (en) | 2016-06-22 |
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| CN201410370935.9A Expired - Fee Related CN104148772B (en) | 2014-07-30 | 2014-07-30 | A kind of fluid-tight fast shut-off method and shearing device |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1396716A (en) * | 1971-11-09 | 1975-06-04 | Maritime Protection As | Liquid seals |
| CN101672428A (en) * | 2009-09-18 | 2010-03-17 | 于连第 | Gas cutting-off machine |
| CN102226476A (en) * | 2011-04-27 | 2011-10-26 | 金莉 | Cleaning-free coal gas breaker |
| CN203694817U (en) * | 2013-12-16 | 2014-07-09 | 江苏航天惠利特环保科技有限公司 | Novel liquid sealing type washing tower |
| CN203992739U (en) * | 2014-07-30 | 2014-12-10 | 北京矿大节能科技有限公司 | A kind of fluid-tight quick cutting device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8141577B2 (en) * | 2006-08-01 | 2012-03-27 | Franklin Fueling Systems, Inc. | Liquid filled pressure/vacuum valve for petroleum underground storage tanks |
-
2014
- 2014-07-30 CN CN201410370935.9A patent/CN104148772B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1396716A (en) * | 1971-11-09 | 1975-06-04 | Maritime Protection As | Liquid seals |
| CN101672428A (en) * | 2009-09-18 | 2010-03-17 | 于连第 | Gas cutting-off machine |
| CN102226476A (en) * | 2011-04-27 | 2011-10-26 | 金莉 | Cleaning-free coal gas breaker |
| CN203694817U (en) * | 2013-12-16 | 2014-07-09 | 江苏航天惠利特环保科技有限公司 | Novel liquid sealing type washing tower |
| CN203992739U (en) * | 2014-07-30 | 2014-12-10 | 北京矿大节能科技有限公司 | A kind of fluid-tight quick cutting device |
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| CN104148772A (en) | 2014-11-19 |
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