CN101358665A - Miniature passive bidirectional vacuum valve - Google Patents
Miniature passive bidirectional vacuum valve Download PDFInfo
- Publication number
- CN101358665A CN101358665A CNA2008100131750A CN200810013175A CN101358665A CN 101358665 A CN101358665 A CN 101358665A CN A2008100131750 A CNA2008100131750 A CN A2008100131750A CN 200810013175 A CN200810013175 A CN 200810013175A CN 101358665 A CN101358665 A CN 101358665A
- Authority
- CN
- China
- Prior art keywords
- valve
- vacuum
- key
- valve body
- piston
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 230000002457 bidirectional effect Effects 0.000 title claims abstract description 25
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004698 Polyethylene Substances 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 235000012055 fruits and vegetables Nutrition 0.000 abstract description 2
- 238000004321 preservation Methods 0.000 abstract 3
- 238000007789 sealing Methods 0.000 description 10
- 230000002045 lasting effect Effects 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000012856 packing Methods 0.000 description 3
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- 235000014676 Phragmites communis Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003032 molecular docking Methods 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003670 easy-to-clean Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000741 silica gel Substances 0.000 description 1
- 229910002027 silica gel Inorganic materials 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Images
Landscapes
- Details Of Valves (AREA)
Abstract
A micro-passive bidirectional vacuum valve arranged on a vacuum container is suitable for being arranged on a frequently used vacuum container with a small size under the environment without a power in particular. A piston, a piston rod, a bidirectional locking mechanism and a key are connected inside a valve body in turn. One end of the piston rod comprises the bidirectional locking mechanism. One end of the key is contacted and connected with the bidirectional locking mechanism in the valve body; the other end is a spherical body which is inserted in a soft vacuum connection pipe outside the valve body in dynamic fit. The valve is opened and closed by the key by being isolated from the wall of the pipe. The side of the valve is equal to or less than Phi 8mmX4cm; the seal is long; the service life is long; the micro-passive bidirectional vacuum valve is simply and conveniently used and is suitable for various vacuum flat solar heat collector, indoor and outdoor vacuum heat preservation conduit pipes, vacuum preservation and conveying containers for fruits and vegetables. The vacuum preservation containers the surface pressure of which can achieve 0.1MPa below zero have the foundation for existence as the matching of the valve and the convenient passive vacuum valve, thus leading the areas without a power to be capable of using economic and practical ''fridges''.
Description
(1) technical field under
The present invention relates to a kind of miniature passive bidirectional vacuum valve that is installed on the various vacuum vessels.Especially under the non-transformer environment, be installed in frequently, repeat to take out on the small volume vacuum vessel of system vacuum.
(2) background technique
At present, solenoid valve, pneumatic valve, mechanical valve are though glass valves kind and model are a lot., the valve that is used for vacuum equipment is few, especially the small volume vacuum valve.Various solenoid valves open and cut out all is electromagnetic structure.The mechanical valve that material such as glass, metal is made, all from not the structure of running shaft.All there is unsatisfactory place.
It is very little that the solenoid vacuum valve volume can't be done.And also the power line of an inconvenience in tow is restricted vacuum vessel displacement distance, is subjected to the puzzlement of not having electricity and having a power failure.Mechanical vacuum valve not only volume is big, and all has a handle that exposes.Take out in the system vacuum process, the handle shaft sealing exists different bypass gas leak phenomenon of degree and short problem of associated seal life-span.Therefore, the bidirectional vacuum valve that the vacuum crisper on the market does not have to be fit to can be used, and can only adopt easy one-way sealing valve.This valve that utilizes the power opening and closing of pressure difference generation has been offset the limited degree of vacuum of partial vacuum pump.The self seal performance of valve is also very poor.So, also do not have gauge pressure to reach the real vacuum crisper of negative 0.1Mpa so far.
Some energy-conserving products power supply that do not need in service, for example, suspension type serrated face vacuum panel solar thermal collector, indoor and outdoor vacuum heat-preserving conduit pipe, vacuum heat-preserving transport pipe, fruit and vegetable vacuum freshness retaining cask, family's food vacuum fresh keeping vessel, vacuum fresh-keeping bag etc. outside window.All need a kind of valve that does not use that power supply, volume are little, the sealing endurance is good, the opening and closing valve is simple and convenient, do not have bypass gas leakage when taking out the system vacuum.
The supporting of this valve and portable passive vacuum pump arranged, made frequently, repeat to take out the gauge pressure of making vacuum and can reach the basis that family's food vacuum fresh keeping vessel of bearing 0.1Mpa has had existence.Make power free pastoral area, borderland, island, remote districts, can use economical and practical " refrigerator ".
A kind of a lot of new energy saving product all is sought after, and volume is little, nothing exposes handle, sealing machine two-way vacuum valve lasting, easy to use also is in space state.
(3) summary of the invention
The objective of the invention is to promote the development of Chinese new energy saving product in order to fill up the blank of this kind vacuum valve.Provide a kind of without power supply, nothing exposes handle, volume is little, the sealing endurance is good, the life-span is long, easy to use, price is low, take out and make the miniature passive bidirectional vacuum valve that does not have the bypass gas leak phenomenon in the vacuum process.The technical problem to be solved in the present invention:
Be to remove and expose handle, design a kind of new mode valve.Specifically be, design new can open, the mechanism of throttle down, and the mechanism of new two-way Locked valve.Difficult point is that new opening ways is simple and convenient, and valve body will strive minimizing, and does not have the bypass gas leak phenomenon when taking out the system vacuum, and sealing is more lasting than other valve
The technical solution used in the present invention:
A kind of miniature passive bidirectional vacuum valve, it is characterized in that, mainly constitute by valve body, piston, bi-directional locking arrangement, key, piston, bi-directional locking arrangement, key are linked in sequence at valve inner, one end of piston rod is a piston, the other end comprises with involved a bi-directional locking arrangement, bi-directional locking arrangement has multiple mode, bi-directional locking arrangement contact in one end of key and the valve body is connected, the other end of key extends to the valve body outside by the opening of valve body movingly, extend in the vacuum hose connector, be to insert movingly in the vacuum hose connector always.
According to such scheme, the present invention also has following concrete measure: said is to insert movingly in the vacuum hose connector, and the part key in the vacuum hose connector is that one or more spheroid constitutes.Though other shape also can move in pipe,, spheroid and pipe friction resistance minimum, feel is best.So, with the single or key combined spheroid of making in the vacuum hose connector.The bi-directional locking arrangement of this valve has multiple mode, by ball constitute, by metal spring leaf or steel wire constitute, by dead bolt become with snap, by being with externally threaded piston rod to constitute.Between this valve and the vacuum pump, adopt the vacuum hose connector to connect.Said vacuum hose connector is to be made by polyethylene or other plastics, perhaps is made of telescopic bellows.The vacuum hose connector directly is socketed on the valve openings to stationary fit.Simple and fast in order to use makes the joint sealing better, does not damage seal ring, adopts the movable joint mode to dock here.With after valve body openings is docked, across the tube wall of vacuum hose connector, towards the valve body direction, straight line squeezes the ball that pushes away on the key center-pole, i.e. throttle down continuously along pipeline with the movable joint on the vacuum hose connector.If towards the valve body direction, straight line squeezes the ball that pushes away on the key sleeve pipe, i.e. Open valve continuously along pipeline.
This valve adopts compound mode, stops a life goods.Any one parts damages or lose can recruit, and make the best use of everything.Just in case dirt stops up valve opening, cleaning for convenience detach.
Beneficial effect of the present invention:
This vacuum valve seals endurance in various vacuum valves best.Because for example the solenoid vacuum valve spring force that is used to seal cannot surpass the electromagnetic force of opening, otherwise has just lost control, can't open or throttle down.And that the spring force that this vacuum valve is used to seal can be got is enough big.So the sealing endurance is best.
This vacuum valve does not have and exposes handle without any the place of bypass gas leakage, has fundamentally removed the root of bypass gas leakage.Create very favorable condition to reduced volume.
This valve of △ does not use power supply, and Security is good, energy saving.The distance of mobile vacuum vessel is not subjected to the restriction of power line.
△ takes out and does not have handle shaft bypass gas leakage problem in the system vacuum process.
△ sealing endurance is good, and the life-span is long.
The △ volume is little.(volume is no more than φ 8mm * 4Cm)
△ opening and closing valve simply, easily and fast.
The piston of △ valve decomposes simple, cleans easily.
△ price performance height.
(4) description of drawings
Fig. 1 ball type miniature passive bidirectional vacuum valve, (101) valve base plate, (102) valve opening, (103) lock nut, (104) spring, (105) valve cylinder, (106) regulate nut, (107) movable joint seal ring, (108) movable joint nut, (109) piston rod, (110) vacuum hose connector, (111) articulated joint, (112) inner seal ring, (113) piston, (114) vacuum vessel, (115) seal ring, (116) locking spring, (117) sliding tube, (118) ball slideway, (119) ball, (120) jump ring, (121) sleeve pipe, (122) key ball.
Fig. 2 drum posture miniature passive bidirectional vacuum valve, (201) Packing spring, (202) drum type frame.
Fig. 3 dead bolt miniature passive bidirectional vacuum valve, (301) inner core, (302) damping spring, (303) pin, (304) latch bolt spring, (305) lockhole, (306) dead bolt, (307) column type slide block.
Fig. 4 screw type miniature passive bidirectional vacuum valve, (401) lock nut, (402) square sleeve pipe, (403) interior nut, (404) universal soft bar.
(5) embodiment
Further introduce structure of the present invention below in conjunction with accompanying drawing.Shown in Fig. 1 to 4, this valve removes and exposes handle, has fundamentally removed the problem of handle shaft bypass gas leakage.Characteristics are that volume is little, and without power supply, during valve opening, the gas between seal container and the atmosphere is two-way perforation, to the limited degree of vacuum of vacuum pump without any influence and loss.Because sealing is lasting and vacuum is taken out when making without any the bypass gas leak phenomenon, so, miniature passive bidirectional vacuum valve be called.
Mainly constitute by valve body, piston (113), bi-directional locking arrangement, key.Piston (113), bi-directional locking arrangement, key are linked in sequence at valve inner.Piston (113) is flexible, makes with silica gel or oil resistant temperature resistant rubber.
Piston rod can be single or knockdown, and an end of piston rod is piston (113), and the other end comprises with involved a bi-directional locking arrangement.
Bi-directional locking arrangement has multiple mode to constitute.1. mainly constitute by being evenly distributed on the piston rod ball more than three (119) on every side.2. the drum type frame of mainly being made up of three above elastic springs or steel wire (202) constitutes, and it is enclosed within on the piston rod movingly.3. mainly be made of latch bolt spring (304), dead bolt (306), lockhole (305), latch bolt spring (304) and dead bolt (306) are embedded in the piston rod.4. mainly be made of lock nut (401), the surface of lock nut (401) includes outside thread, and wherein an end is connected movingly with piston.Bi-directional locking arrangement is two kinds of special positions of locking valve rod, the i.e. two states of lock piston.
It is a part of in valve body having only key, and a part is outside valve body.Key can be single or knockdown.Bi-directional locking arrangement contact in one end of key and the valve body is connected, and the other end of key is extended to outside the valve body by the opening of valve body movingly, extend in the vacuum hose connector (110) always, and be to insert movingly in the vacuum hose connector (110).Key is the two states that is used for changing bi-directional locking arrangement.And then opening and closing valve.
Tube wall across vacuum hose connector (110) can successfully be handled the key in it, is because the key in it is more than one spheroid, scribbles lubricant oil on the ball.And be simple straight line motion.
It is more lasting than other valve to seal, and is because the spring force of closing valve is not subjected to the constraint of any condition, can obtain enough big.For example, the spring force of solenoid valve cannot surpass electromagnetic force, otherwise has just lost control.
As shown in Figure 1, ball type miniature passive bidirectional vacuum valve, valve body are to be made of valve base plate (101), inner seal ring (112), valve cylinder (105).One valve opening (102) that connects is arranged on the valve base plate (101).Valve base plate (101) adopts the benefit of compound mode to be with valve cylinder (105), just in case there is dirt to pollute valve opening (102) or piston (113), region of interest is convenient to dismounting, is easy to clean.Lock nut (103) and seal ring (115) are fastened on valve body on the vacuum vessel (114).Spring (104) links into an integrated entity piston (113) and piston rod (109).Bi-directional locking arrangement is mainly by regulating nut (106), locking spring (116), sliding tube (117) formation.Sustained height in sliding tube (117) has the open-work more than three on the tube wall, i.e. ball slideway (118).Be placed with ball (119) in each hole movingly.Ball diameter is less than the diameter of sliding tube (117).Adjusting nut (106), locking spring (116), sliding tube (117) are enclosed within on the piston rod (109) movingly.Bi-directional locking arrangement be distributed in piston rod around, constituted that an end of piston rod is involved a bi-directional locking arrangement.Sliding tube (117) is assemblied in the valve body movingly.Ball (119) locks piston rod (109) under the force action of inner inclined-plane of valve cylinder (105) and locking spring (116).
Being connected between miniature passive bidirectional vacuum valve and the vacuum pump, adopt vacuum hose connector (110).This pipe adopts vinyl tube, gets its good springiness, ageing-resistant, transparent characteristics.Also can make, perhaps constitute by telescopic bellows with other plastics.Vacuum hose connector (110) adopts the movable joint mode with docking of valve body.Movable joint is made of movable joint seal ring (107), articulated joint (111), movable joint nut (108).Be fixed on the articulated joint (111) to one end stationary fit of vacuum hose connector (110).Tighten movable joint nut (108), promptly finished docking of vacuum hose connector (110) and valve body.Unclamp movable joint nut (108), promptly finished separating of vacuum hose connector (110) and valve body.
This key is made of jump ring (120), sleeve pipe (121), key ball (122).Sleeve pipe (121) is enclosed within on the key center-pole movingly.One end of sleeve pipe (121) is a spheroid, key ball (122) on center-pole inserts in the vacuum hose connector (110) movingly, in order to reduce the frictional resistance between key and the vacuum hose connector, the end of key is made spherical, and spherome surface scribbles yellow glycerine.The diameter of ball is less than the internal diameter of vacuum hose connector (110).Bi-directional locking arrangement contact in the other end of key and the valve body is connected.Tube wall across vacuum hose connector (110) towards crowded interior key ball (122) of vacuum hose connector (110) or the ball on the sleeve pipe (121) of pushing away of valve body direction straight line, changes the state of bi-directional locking arrangement, and then the opening and closing valve.
As shown in Figure 2, drum posture miniature passive bidirectional vacuum valve, bi-directional locking arrangement mainly are made of Packing spring (201), adjusting nut, drum type frame (202).Piston directly is fixed on the end of piston rod.Packing spring (201), adjusting nut, drum type frame (202) are enclosed within on the piston rod movingly.Drum type frame (202) is made by Ω type elastic spring or steel wire more than three.This key one end is a spheroid, and the other end is a tubular body, and the pipe inboard has the domatic of appropriateness.When key was pushed into valve body, the inner tubal wall of key pipe extruding reed made the reed elongation, and then makes piston leave valve opening, makes valve opening.When extracting key, drum type frame (202) restores to the original state, valve closing.
As shown in Figure 3, dead bolt miniature passive bidirectional vacuum valve, bi-directional locking arrangement mainly are made of inner core (301), damping spring (302), pin (303), latch bolt spring (304), lockhole (305), dead bolt (306), column type slide block (307).Be installed in the valve body to inner core (301) stationary fit, some rectangular lockholes (305) and spacing pin (303) are arranged on the inner core (301).The inboard one side of oblong aperture chamfering be for, only when turning clockwise column type slide block (307), dead bolt (306) could skid off in square hole.Spacing pin (303) on the inner core (301) is to prevent that column type slide block (307) from coming off in valve body, and column type slide block (307) can only be rotated by positive and negative 90 degree in inner core (301) lining.Damping spring (302) links into an integrated entity piston and column type slide block (307).Latch bolt spring (304) and dead bolt (306) are installed in the column type slide block (307).This locking framework has been taken into account the effect of moving of piston rod and control piston, and locking framework is distributed in the inside of piston rod, and an end that has constituted piston rod includes bi-directional locking arrangement.The endoporus of slide block one end has internal thread, in order to connect key.After key turned clockwise on earth, column type slide block (307) began rotation.After slide block revolved and turn 90 degrees, dead bolt (306) skidded off in square hole.Key is outwards pulled out, at this moment valve opening.Connect movable joint, squeeze key ball, valve closing and self-locking along the pipeline straight line.After separating movable joint, be rotated counterclockwise key, key breaks away from valve.
As shown in Figure 4, screw type miniature passive bidirectional vacuum valve, bi-directional locking arrangement mainly are made of lock nut (401) and interior nut (403).Lock nut (401) has outside thread, and an end that docks with key is the square body, and the other end and piston 360 degree link together with rotating freely.Contain exhaust port interior nut (403) stationary fit be fixed in the valve body.Key is made of square sleeve pipe (402), universal soft bar (404), key ball.Universal soft bar (404) is close around forming by steel bar or steel wire.Turn clockwise behind the key valve closing.After being rotated counterclockwise key, valve opening.
Claims (4)
1, a kind of miniature passive bidirectional vacuum valve, it is characterized in that, mainly by valve body, piston, bi-directional locking arrangement, key constitutes, piston, bi-directional locking arrangement, key is linked in sequence at valve inner, one end of piston rod is a piston, the other end comprises with involved a bi-directional locking arrangement, bi-directional locking arrangement has multiple mode, bi-directional locking arrangement contact in one end of key and the valve body is connected, the other end of key extends to the valve body outside by the opening of valve body movingly, extend in the vacuum hose connector, be to insert movingly in the vacuum hose connector always.
2, miniature passive bidirectional vacuum valve according to claim 1 is characterized in that, said is to insert movingly in the vacuum hose connector, and the part key in the vacuum hose connector is that one or more spheroid constitutes.
According to the described miniature passive bidirectional vacuum valve of claim 1 to 2, it is characterized in that 3, said bi-directional locking arrangement has multiple mode, by ball constitute, by metal spring leaf or steel wire constitute, by dead bolt become with snap, by being with externally threaded piston rod to constitute.
According to the described miniature passive bidirectional vacuum valve of claim 1 to 3, it is characterized in that 4, said vacuum hose connector is to be made by polyethylene or other plastics, perhaps is made of telescopic bellows.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100131750A CN101358665B (en) | 2008-09-12 | 2008-09-12 | Miniature passive bidirectional vacuum valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2008100131750A CN101358665B (en) | 2008-09-12 | 2008-09-12 | Miniature passive bidirectional vacuum valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101358665A true CN101358665A (en) | 2009-02-04 |
| CN101358665B CN101358665B (en) | 2011-06-01 |
Family
ID=40331200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2008100131750A Expired - Fee Related CN101358665B (en) | 2008-09-12 | 2008-09-12 | Miniature passive bidirectional vacuum valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101358665B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900875A (en) * | 2012-11-03 | 2013-01-30 | 李先强 | Temperature-identifying automatic water switch |
| CN103742714A (en) * | 2014-01-24 | 2014-04-23 | 侯马经济开发区日祥科技有限公司 | Internal vacuum valve |
| CN107548735A (en) * | 2017-08-28 | 2018-01-09 | 重庆洁邦电器有限公司 | The vacuum grain storage device of end cap integrated air flow passage |
| CN118499481A (en) * | 2024-07-17 | 2024-08-16 | 山西兴益化工有限公司 | Vacuum extraction valve on vacuum tank capable of realizing self-locking and working method thereof |
-
2008
- 2008-09-12 CN CN2008100131750A patent/CN101358665B/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102900875A (en) * | 2012-11-03 | 2013-01-30 | 李先强 | Temperature-identifying automatic water switch |
| CN103742714A (en) * | 2014-01-24 | 2014-04-23 | 侯马经济开发区日祥科技有限公司 | Internal vacuum valve |
| CN103742714B (en) * | 2014-01-24 | 2016-03-30 | 侯马经济开发区日祥科技有限公司 | Internal vacuum valve |
| CN107548735A (en) * | 2017-08-28 | 2018-01-09 | 重庆洁邦电器有限公司 | The vacuum grain storage device of end cap integrated air flow passage |
| CN118499481A (en) * | 2024-07-17 | 2024-08-16 | 山西兴益化工有限公司 | Vacuum extraction valve on vacuum tank capable of realizing self-locking and working method thereof |
| CN118499481B (en) * | 2024-07-17 | 2024-10-01 | 山西兴益化工有限公司 | Vacuum extraction valve on vacuum tank capable of realizing self-locking and working method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101358665B (en) | 2011-06-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101358665A (en) | Miniature passive bidirectional vacuum valve | |
| CN201434140Y (en) | Miniature passive bidirectional vacuum valve | |
| CN204420200U (en) | Cylinder-rotating three-way diverter valve | |
| CN101520097B (en) | Hard-sealing ball valve | |
| CN104613183A (en) | High-pressure butterfly valve | |
| CN102434680A (en) | Quick disconnection valve | |
| CN108953658B (en) | A kind of ball valve | |
| CN203614787U (en) | Ball valve | |
| CN213273363U (en) | Freezer is sealed prevents heat preservation door of air conditioning loss | |
| CN203548969U (en) | Two-position two-way control valve | |
| CN2633799Y (en) | Freshness preserving beer bucket | |
| CN201954032U (en) | Hand-operated hydraulic ball valve | |
| CN206708404U (en) | A kind of heat-preserving cut-off valve | |
| CN206972967U (en) | A kind of electrical ball valve | |
| CN202348225U (en) | Kelly bar plug valve | |
| CN113639079B (en) | Break valve for pipeline fluid conveying control | |
| CN220540354U (en) | But quick connect's ball valve | |
| CN211716001U (en) | Integrated chlorine gas supply device | |
| CN210036414U (en) | Explosion-proof mouth device of heat exchanger | |
| CN201872765U (en) | Angle cock | |
| CN213017829U (en) | Pneumatic single-seat bidirectional sealing track ball valve | |
| CN218913816U (en) | Kettle bottom discharge valve | |
| CN219062515U (en) | Leakage-proof double-layer diaphragm valve | |
| CN222352111U (en) | Heating pipe leakage prevention device | |
| CN217130487U (en) | Sealing valve convenient to install |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110601 Termination date: 20140912 |
|
| EXPY | Termination of patent right or utility model |