CN105757270A - Gear and rack flat plate gate valve - Google Patents
Gear and rack flat plate gate valve Download PDFInfo
- Publication number
- CN105757270A CN105757270A CN201610262235.7A CN201610262235A CN105757270A CN 105757270 A CN105757270 A CN 105757270A CN 201610262235 A CN201610262235 A CN 201610262235A CN 105757270 A CN105757270 A CN 105757270A
- Authority
- CN
- China
- Prior art keywords
- rack
- flashboard
- valve body
- medium channel
- valve
- 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.)
- Pending
Links
Classifications
-
- 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
-
- 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
- F16K3/0227—Packings
-
- 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
- F16K3/0254—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 being operated by particular means
-
- 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
- F16K3/30—Details
- F16K3/314—Forms or constructions of slides; Attachment of the slide to the spindle
-
- 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
- F16K31/44—Mechanical actuating means
- F16K31/53—Mechanical actuating means with toothed gearing
- F16K31/54—Mechanical actuating means with toothed gearing with pinion and rack
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanically-Actuated Valves (AREA)
Abstract
The invention provides a gear and rack flat plate gate valve, and relates to the valve technology.The valve comprises a valve body.A medium channel is arranged in the valve body.A gate plate capable of closing the medium channel is further arranged on the valve body.A rack is arranged on the gate plate.A gear is arranged on the valve body and meshed with the rack.The gear rotates to drive the gate plate to vertically move in the tangent direction of the gear in a reciprocating mode so as to open or close the medium channel, and the valve can be switched on or switched off.A valve rod is omitted, the problem that the valve rod stretches and moves to abrade filler and cause leakage is effectively solved, the sealing performance of the gear and rack flat plate gate valve is improved, and the operation height and installation height of the valve are reduced.
Description
Technical field
The present invention relates to valve gate technology, particularly relate to a kind of rack-and-pinion flat gate valve.
Background technology
It is being that in the course of conveying of the exploitation of oil, natural gas etc. and oil plant, gas piping, rack-and-pinion flat gate valve is widely adopted.Rack-and-pinion flat gate valve is generally made up of valve body, valve gap, flashboard, valve rod and handwheel；Handwheel is arranged on valve gap, and handwheel is fixed with the head end of valve rod and is connected；Being formed with medium channel in valve body, flashboard is arranged in medium channel, and flashboard is fixed with the tail end of valve rod and is connected；Can move up and down by band ovable valve stem by rotating handwheel, and then drive flashboard move up and down to open or block medium channel.
In prior art, owing to the control system working pressure in the device such as oil drilling, oil recovery is significantly high, the sealing property of the rack-and-pinion flat gate valve adopted in device is required also significantly high, therefore, in order to improve the sealing property of rack-and-pinion flat gate valve, between valve rod and valve seat, generally it is provided with airtight and watertight padding；Back and forth move up and down yet with valve rod, very easily scratch airtight and watertight padding and cause revealing, so that the sealing reliability of rack-and-pinion flat gate valve is poor.Particularly large bore valves, operates highly high-leveled and difficult operation, and setting height(from bottom) is high, captures space bigger.
Summary of the invention
For drawbacks described above of the prior art, the present invention provides a kind of rack-and-pinion flat gate valve, and sealing reliability is higher.
The first aspect of the invention is to provide a kind of rack-and-pinion flat gate valve, including: valve body, it is provided with medium channel in described valve body, described valve body is additionally provided with the flashboard that can block described medium channel；Being provided with tooth bar on described flashboard, described valve body is provided with gear, described gear engages with described tooth bar, drives described flashboard move back and forth to open along the tangential direction of described gear or block described medium channel by described pinion rotation.
Further, described rack and pinion includes two or more respectively, and each described gear engages with corresponding described tooth bar.
Further, gear described at least two is connected by a power transmission shaft.
Further, described power transmission shaft is rotatably arranged on described valve body, and described power transmission shaft stretches out in one end of described valve body and is provided with the driving mechanism for driving described power transmission shaft to rotate.
Further, described power transmission shaft is provided with circular hole towards described driving mechanism one end, is embedded with the first sealing ring for improving sealing between described power transmission shaft and valve body in described circular hole；Described power transmission shaft is provided with sealant towards filling out between described driving mechanism one end and described valve body.
Further, described valve body also includes the valve seat being arranged on described medium channel inwall, and described valve seat surrounds a part for described medium channel towards the surface of medium channel.
Further, described valve seat is provided with groove towards the surface of described flashboard, is embedded with the second sealing ring for improving sealing between flashboard and valve seat in described groove.
Further, described medium channel includes an inlet and an outlet, and described flashboard is arranged between described entrance and exit, and described flashboard is perpendicular to the axial of described medium channel.
Further, described flashboard is tabular, and the effective surface area of described flashboard is more than or equal to the cross-sectional area of described medium channel.
Further, it is provided with inside described valve body for guaranteeing the deflector apron that described flashboard moves towards preset direction.
Rack-and-pinion flat gate valve provided by the invention, including: valve body, it is provided with medium channel in described valve body, described valve body is additionally provided with the flashboard that can block described medium channel；Described flashboard is provided with tooth bar, described valve body is provided with gear, described gear engages with described tooth bar, described flashboard is driven to move back and forth up and down to open along the tangential direction of described gear or block described medium channel by described pinion rotation, what realize valve is turned on and off operation, eliminates valve rod part, effectively prevent the problem that valve rod extensional motion abrasion filler causes leakage, improve the sealing property of rack-and-pinion flat gate valve, reduce valve operation height and setting height(from bottom).
Accompanying drawing explanation
Fig. 1 is the structural representation of rack-and-pinion flat gate valve of the present invention；
Fig. 2 is that the A of Fig. 1 is to schematic diagram；
Fig. 3 is the partial schematic diagram of Fig. 2.
Wherein,
10-valve body；11-medium channel；
20-flashboard；21-tooth bar；
22-gear；23-power transmission shaft；
24-V type airtight and watertight padding；25-gland；
26-screw；30-valve gap；
31-cavity volume；40-bolt；
50-valve seat；60-the first sealing ring；
70-deflector apron.
Detailed description of the invention
Below in conjunction with accompanying drawing, some embodiments of the present invention are elaborated.When not conflicting, the feature in following embodiment and embodiment can be mutually combined.
In the present invention, the term such as term " installation ", " connection ", " fixing " is all broadly understood, for instance, " connection " can be fixing connection, it is also possible to is removably connect, or connects integratedly.For the ordinary skill in the art, it is possible to understand above-mentioned term concrete meaning in the present invention as the case may be.
Fig. 1 is the structural representation of rack-and-pinion flat gate valve of the present invention；Refer to Fig. 1.
The present embodiment provides a kind of rack-and-pinion flat gate valve, including: valve body 10, it is provided with medium channel 11 in valve body 10, valve body 10 is additionally provided with the flashboard 20 that can block medium channel 11；Being provided with tooth bar 21 on flashboard 20, valve body 10 is provided with gear 22, gear 22 engages with tooth bar 21, is rotated by gear 22 and drives flashboard 20 move back and forth to open along the tangential direction of gear 22 or block medium channel 11.
Specifically, valve body 10 offering the medium channel 11 run through, medium channel 11 can be column；Medium channel 11 can include an inlet and an outlet, and entrance and exit can coaxially and be connected；Which end of concrete medium channel 11 is entrance, it is possible to be set according to actual needs.Flashboard 20 arranges between the inlet, and flashboard 20 can be perpendicular to the axially arranged of medium channel 11；Moving on flashboard 20 can be open medium channel 11, and it can be close medium channel 11 that flashboard 20 moves down.Tooth bar 21 can be fixed by welding on flashboard 20；Or, tooth bar 21 can be connected fixing with flashboard 20 by securing member.
In the present embodiment, the inwall of medium channel 11 is also provided with valve seat 50, valve seat 50 can adopt wear-resistant material to be formed, valve seat 50 can surround a part for medium channel 11 towards the surface of medium channel 11, valve seat 50 is arranged on the both sides of flashboard 20, and valve seat 50 cooperates towards the surface of flashboard 20 and the surface towards valve seat 50 of flashboard 20 sealing.Wherein, flashboard 20 all processes through overspray tungsten on two surfaces of valve seat 50, to improve the performance of the anticorrosive resistance to erosion of flashboard 20.
The rack-and-pinion flat gate valve that the present embodiment provides, including: valve body 10, it is provided with medium channel 11 in valve body 10, valve body 10 is additionally provided with the flashboard 20 that can block medium channel 11；Flashboard 20 is provided with tooth bar 21, valve body 10 is provided with gear 22, gear 22 engages with tooth bar 21, rotated by gear 22 and drive flashboard 20 move back and forth to open along the tangential direction of gear 22 or block medium channel 11, what realize valve is turned on and off operation, effectively prevent prior art stem movement abrasion filler and cause the problem of leakage, improve the sealing property of rack-and-pinion flat gate valve.
Further, valve seat 50 is provided with groove towards the surface of flashboard 20, the second sealing ring for improving sealing between flashboard 20 and valve seat 50 it is embedded with in groove, to avoid the medium in medium channel 11 to flow into the cavity volume 31 in valve gap 30, thus improving the sealing property of rack-and-pinion flat gate valve further.
Fig. 2 is that the A of Fig. 1 is to schematic diagram；Refer to Fig. 2.
Further, tooth bar 21 and gear 22 include two or more respectively, and each gear 22 engages with corresponding tooth bar 21.It is preferred that tooth bar 21 is two, being separately positioned on the two ends of flashboard 20, correspondingly, the gear 22 being meshed with tooth bar 21 is also two, so that moving up and down of flashboard 20 is more steady, helps to ensure that the performance of rack-and-pinion flat gate valve.
Further, at least two gear 22 is connected by a power transmission shaft 23, and power transmission shaft 23 is rotatably arranged on valve body 10.
Specifically, valve body 10 is provided with installing hole, and power transmission shaft 23 can pass through bearings in the installing hole of valve body 10, and power transmission shaft 23 stretches out in one end of valve body 10 and is provided with the driving mechanism (not shown) for driving power transmission shaft 23 to rotate.Wherein, driving device can be handle or bevel gearing.
In the present embodiment, gear 22 can with power transmission shaft 23 interference fit；Or, gear 22 can be fastened on power transmission shaft 23 by key.
Fig. 3 is the partial schematic diagram of Fig. 2；Refer to Fig. 3.
Further, power transmission shaft 23 is provided with circular hole towards driving mechanism one end, is embedded with the first sealing ring 60 for improving sealing between power transmission shaft 23 and valve body 10 in circular hole；Power transmission shaft 23 is filled out between the installing hole hole wall of driving mechanism one end and valve body 10 and is provided with sealant.Wherein, circular hole is disposed circumferentially around along power transmission shaft 23, to form groove-like.Wherein, installing hole is used for installing power transmission shaft 23.
Specifically, power transmission shaft 23 is also formed with gap between one end and installing hole hole wall of driving mechanism, sealant it is filled with in gap, sealant can include V-seal filler 24, airtight and watertight padding compresses in the gap by gland 25, and gland 25 is connected fixing with valve body 10 by screw 26.Wherein, the first sealing ring 60 between power transmission shaft 23 and valve body 10 is arranged on airtight and watertight padding and deviates from one end of driving mechanism.
In the present embodiment, when rotating drive mechanism, power transmission shaft 23 is followed driving mechanism and is rotated together, and the gear 22 on power transmission shaft 23 rotates along with power transmission shaft 23, and then is moved up and down with the drive flashboard 20 that engages of tooth bar 21 by gear 22.In this process, power transmission shaft 23 only rotates, do not do tension and compression campaign, it is to avoid the damage that airtight and watertight padding is caused.
Further, flashboard 20 can be tabular, and the outline of flashboard 20 matches with the Internal periphery of medium channel 11, and the effective surface area of flashboard 20 is more than or equal to the cross-sectional area of medium channel 11.
Further, rack-and-pinion flat gate valve can also include valve gap 30, and valve gap 30 is arranged on the top of valve body 10, and the centrage of valve gap 30 can be vertical with the axis of medium channel 11, and valve gap 30 can be connected by least two bolt 40 is fixing with valve body 10；Such as, valve gap 30 is provided with bonnet flange towards one end of valve body 10, bonnet flange offers the bolt hole coordinated with bolt 40, valve body 10 is provided with valve flange towards one end of valve gap 30, also offering the bolt hole coordinated with bolt 40 on valve flange, valve gap is fixedly connected with the valve body by bolt 40 through the bolt hole in bonnet flange and the bolt hole on valve flange；Form a cavity volume 31 in valve gap 30, during for moving when medium channel 11 is opened and on flashboard 20, house flashboard 20.
Further, can be provided with outside valve body 10 for guaranteeing the deflector apron 70 that flashboard 20 moves towards preset direction.Specifically, deflector apron 70 can be two, is separately positioned on the both sides of flashboard 20；Deflector apron 70 can be fixed on valve gap 30, for instance, deflector apron 70 deviates from one end of flashboard 20 and is weldingly fixed on valve gap 30, thus avoiding flashboard 20 to rock when moving towards valve gap 30.
The first sealing ring and the second sealing ring in the various embodiments described above can be made entirety with elastomeric material and have elastic component, and its cross section can be circular or rectangle.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, it is not intended to limit；Although the present invention being described in detail with reference to foregoing embodiments, it will be understood by those within the art that: the technical scheme described in foregoing embodiments still can be modified by it, or wherein some or all of technical characteristic is carried out equivalent replacement；And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (10)
1. a rack-and-pinion flat gate valve, including: valve body, it is provided with medium channel in described valve body, described valve body is additionally provided with the flashboard that can block described medium channel；It is characterized in that, described flashboard is provided with tooth bar, described valve body is provided with gear, and described gear engages with described tooth bar, drives described flashboard move back and forth to open along the tangential direction of described gear or block described medium channel by described pinion rotation.
2. rack-and-pinion flat gate valve according to claim 1, it is characterised in that described rack and pinion includes two or more respectively, and each described gear engages with corresponding described tooth bar.
3. rack-and-pinion flat gate valve according to claim 2, it is characterised in that gear described at least two is connected by a power transmission shaft.
4. rack-and-pinion flat gate valve according to claim 3, it is characterised in that described power transmission shaft is rotatably arranged on described valve body, and described power transmission shaft stretches out in one end of described valve body and is provided with the driving mechanism for driving described power transmission shaft to rotate.
5. rack-and-pinion flat gate valve according to claim 4, it is characterised in that described power transmission shaft is provided with circular hole towards described driving mechanism one end, is embedded with the first sealing ring for improving sealing between described power transmission shaft and valve body in described circular hole；Described power transmission shaft is provided with sealant towards filling out between described driving mechanism one end and described valve body.
6. the rack-and-pinion flat gate valve according to any one of claim 1-5, it is characterised in that described valve body also includes the valve seat being arranged on described medium channel inwall, described valve seat surrounds a part for described medium channel towards the surface of described medium channel.
7. rack-and-pinion flat gate valve according to claim 6, it is characterised in that described valve seat is provided with groove towards the surface of described flashboard, is embedded with the second sealing ring for improving sealing between flashboard and valve seat in described groove.
8. the rack-and-pinion flat gate valve according to any one of claim 1-5, it is characterised in that described medium channel includes an inlet and an outlet, and described flashboard is arranged between described entrance and exit, and described flashboard is perpendicular to the axial of described medium channel.
9. the rack-and-pinion flat gate valve according to any one of claim 1-5, it is characterised in that described flashboard is tabular, and the effective surface area of described flashboard is more than or equal to the cross-sectional area of described medium channel.
10. the rack-and-pinion flat gate valve according to any one of claim 1-5, it is characterised in that be provided with inside described valve body for guaranteeing the deflector apron that described flashboard moves towards preset direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610262235.7A CN105757270A (en) | 2016-04-22 | 2016-04-22 | Gear and rack flat plate gate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610262235.7A CN105757270A (en) | 2016-04-22 | 2016-04-22 | Gear and rack flat plate gate valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105757270A true CN105757270A (en) | 2016-07-13 |
Family
ID=56324409
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610262235.7A Pending CN105757270A (en) | 2016-04-22 | 2016-04-22 | Gear and rack flat plate gate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105757270A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139949A (en) * | 2018-10-30 | 2019-01-04 | 湖南金炉科技股份有限公司 | Gauche form high-temperature exhaust air valve for Industrial Stoves |
| CN112943954A (en) * | 2021-01-28 | 2021-06-11 | 尧舜(上海)环保科技有限公司 | Valve for ecological closestool and ecological closestool applying same |
| CN114076037A (en) * | 2020-08-21 | 2022-02-22 | 比亚迪股份有限公司 | Throttle valve flashboard, throttle valve main body, throttle valve device and vehicle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1381938A (en) * | 1920-01-29 | 1921-06-21 | Homer D Martindale | Valve |
| CN2045448U (en) * | 1989-04-17 | 1989-10-04 | 王佐才 | Adjustable sealing specific pressure slurry valve |
| US20050242316A1 (en) * | 2004-04-30 | 2005-11-03 | Senior Investments Ag | Rack and pinion wheel drive for an industrial sliding blade damper |
| CN104832669A (en) * | 2015-05-26 | 2015-08-12 | 中国船舶重工集团公司第七�三研究所 | High-tightness high-temperature flue gas gate plate valve |
| CN205715718U (en) * | 2016-04-22 | 2016-11-23 | 凯瑞特阀业有限公司 | Rack-and-pinion flat gate valve |
-
2016
- 2016-04-22 CN CN201610262235.7A patent/CN105757270A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1381938A (en) * | 1920-01-29 | 1921-06-21 | Homer D Martindale | Valve |
| CN2045448U (en) * | 1989-04-17 | 1989-10-04 | 王佐才 | Adjustable sealing specific pressure slurry valve |
| US20050242316A1 (en) * | 2004-04-30 | 2005-11-03 | Senior Investments Ag | Rack and pinion wheel drive for an industrial sliding blade damper |
| CN104832669A (en) * | 2015-05-26 | 2015-08-12 | 中国船舶重工集团公司第七�三研究所 | High-tightness high-temperature flue gas gate plate valve |
| CN205715718U (en) * | 2016-04-22 | 2016-11-23 | 凯瑞特阀业有限公司 | Rack-and-pinion flat gate valve |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109139949A (en) * | 2018-10-30 | 2019-01-04 | 湖南金炉科技股份有限公司 | Gauche form high-temperature exhaust air valve for Industrial Stoves |
| CN109139949B (en) * | 2018-10-30 | 2024-01-26 | 湖南金炉科技股份有限公司 | Deflection type high-temperature exhaust valve for industrial kiln |
| CN114076037A (en) * | 2020-08-21 | 2022-02-22 | 比亚迪股份有限公司 | Throttle valve flashboard, throttle valve main body, throttle valve device and vehicle |
| CN112943954A (en) * | 2021-01-28 | 2021-06-11 | 尧舜(上海)环保科技有限公司 | Valve for ecological closestool and ecological closestool applying same |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105757270A (en) | Gear and rack flat plate gate valve | |
| CN205715718U (en) | Rack-and-pinion flat gate valve | |
| EP3105481B1 (en) | In-line control valve | |
| CN111720569A (en) | Flat gate valve | |
| RU191873U1 (en) | Axial Flow Axial Flow Control Valve | |
| RU181161U1 (en) | Axial Flow Control Valve | |
| KR20200123970A (en) | Vacuum Gate Valve | |
| CN111173951B (en) | Gate valve | |
| CN109357021A (en) | One kind can compensate pressing sleeve formula shut-off valve and method automatically | |
| CN104847917A (en) | Electric split axial-flow type regulating valve | |
| CN201487237U (en) | Pilot operated stop valve | |
| CN103953735A (en) | Special angle stop valve for chlor-alkali | |
| CN103711933A (en) | Top-mounted double-sealing three-section ball valve | |
| US10036485B2 (en) | Dual seal fire safe stem packing orientation | |
| KR20100085880A (en) | Butterfly valve | |
| KR101577709B1 (en) | Slide Gate Valve with cooling structure | |
| CN109139943B (en) | Regulating valve with displacement fine-tuning device | |
| CN105370935A (en) | Y-shaped stop-check valve | |
| KR20180054299A (en) | Automatic valve apparatus | |
| CN204784980U (en) | Magnetic drive ne -leakage valve | |
| CN112943978A (en) | Double helix line switching-over structure of multichannel plunger valve | |
| CN207333757U (en) | A kind of fuel charger shut-off valve | |
| CN221097500U (en) | Pneumatic butterfly valve | |
| RU204190U1 (en) | Axial shut-off and control valves | |
| CN220470680U (en) | Closed isolation valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20160713 |
|
| RJ01 | Rejection of invention patent application after publication |