CN107255171A - A kind of non-maintaining hermetically sealed cut-out cover plate valve - Google Patents
A kind of non-maintaining hermetically sealed cut-out cover plate valve Download PDFInfo
- Publication number
- CN107255171A CN107255171A CN201710693932.2A CN201710693932A CN107255171A CN 107255171 A CN107255171 A CN 107255171A CN 201710693932 A CN201710693932 A CN 201710693932A CN 107255171 A CN107255171 A CN 107255171A
- Authority
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- China
- Prior art keywords
- valve
- chamber
- gap
- hermetically sealed
- inlet plenum
- 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.)
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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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/16—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members
- F16K1/18—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps
- F16K1/22—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure-members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
- F16K1/226—Shaping or arrangements of the sealing
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
-
- 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
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/36—Valve members
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Details Of Valves (AREA)
- Sliding Valves (AREA)
Abstract
The invention discloses the non-maintaining hermetically sealed cut-out cover plate valve of one kind, it is related to valve technology field.The cut-out cover plate valve, by setting the anti-leakage chamber being connected with the first gap in the outside of inlet plenum, the anti-interior leakage chamber being connected with the second gap is set at the steam vent of valve body, realize the sealing gland between inlet plenum and outside air, and the sealing gland between inlet plenum and exhaust chamber, it is to avoid there is the leakage of gas and interior leakage；And due to contactless between valve rod and the side wall of inlet plenum, it is also contactless between valve cover and dividing plate, it is to avoid valve rod and valve cover wear and tear, and realize non-maintaining；Meanwhile, the wooden partition by the use of live rectangle breather line can effectively reduce cost as valve body.
Description
Technical field
The present invention relates to valve technology field, more particularly to a kind of non-maintaining hermetically sealed cut-out cover plate valve.
Background technology
With economic development, industrial automatic control level is constantly being improved, thus to regulating valve in process control
Reliability, the requirement of economy are also constantly being improved.This just it is also proposed higher requirement to valve body structure.
The valve used at present is generally sealed using soft seal or hard sealedly form, still, either using soft
, there is the contact between physical components, cause valve plate, valve rod during motion in seal form, or hard seal form,
Constantly come in contact between seal, so that valve plate, valve rod and seal can be worn, decline its life-span, let out
Divulge a secret it is dangerous improve, and need often safeguard change, because the structure of such valve is more complicated, and relatively it is heavy, so,
The maintenance of parts is changed and is extremely difficult；Further, since valve mechanism is complicated, weight is big, so production cost is higher.
The content of the invention
It is an object of the invention to provide the non-maintaining hermetically sealed cut-out cover plate valve of one kind, so as to solve to exist in the prior art
Foregoing problems.
To achieve these goals, the technical solution adopted by the present invention is as follows：
A kind of non-maintaining hermetically sealed cut-out cover plate valve, including：Valve rod, valve cover, high pressure gas pipeline, it is anti-in leakage chamber and anti-
Leaked outside chamber, and the high pressure gas pipeline is connected with the anti-interior leakage chamber and the anti-leakage chamber respectively, and the valve rod is installed
On rectangle breather line, the rectangle breather line is divided into inlet plenum and exhaust chamber, one end of the valve rod by dividing plate
Outside positioned at the inlet plenum is connected with drive device, is provided between the side wall of the valve rod and the inlet plenum between first
Gap, the other end of the valve rod is located in the exhaust chamber through the dividing plate, and steam vent, the valve are offered on the dividing plate
Cover plate is arranged on the valve rod, and the valve cover is located in the inlet plenum, and the valve cover is just set to the steam vent
Put, the valve cover can be moved left and right with the valve rod in the inlet plenum, when the valve cover is located at low order end, the valve
The second gap is provided between the side wall of cover plate and the anti-interior leakage chamber；
The anti-leakage chamber is located at the outside of the inlet plenum, and the anti-leakage chamber is connected with first gap；
Described to prevent that interior leakage chamber is located at the steam vent, the anti-interior chamber that leaks is connected with second gap.
Preferably, the thickness in first gap is less than 2mm.
Preferably, the thickness in second gap is less than 2mm.
Preferably, the anti-interior leakage chamber is annular compartment, and the width x thickness of the annular compartment is：50x60mm.
Preferably, the annular compartment, which is located on the wall of second gap side, is provided with spilehole.
Preferably, a diameter of 4-6mm of the spilehole, all spileholes are evenly arranged in the annular compartment
Wall on, and the distance between two adjacent spileholes are 35-40mm.
Preferably, the diameter of the valve cover is more than the diameter of the steam vent and equal to the external diameter of the annular compartment.
Preferably, the anti-interior leakage chamber is arranged on the dividing plate.
Preferably, in addition to bearing, the bearing is separately mounted on the inlet plenum and the exhaust chamber, the valve rod
On the bearing.
Preferably, the drive device is cylinder.
The beneficial effects of the invention are as follows：The non-maintaining hermetically sealed cut-out cover plate valve of one kind provided in an embodiment of the present invention, passes through
The anti-leakage chamber being connected with the first gap is set in the outside of inlet plenum, sets and connects with the second gap at the steam vent of valve body
The anti-interior leakage chamber connect, realizes the sealing gland between inlet plenum and outside air, and the sealing gland between inlet plenum and exhaust chamber,
Avoid the occurrence of the leakage and interior leakage of gas；And due to contactless between valve rod and the side wall of inlet plenum, valve cover and dividing plate it
Between it is also contactless, it is to avoid valve rod and valve cover wear and tear, and realize non-maintaining；Meanwhile, utilize the rectangle breather pipe at scene
The wooden partition in road can effectively reduce cost as valve body.
Brief description of the drawings
Fig. 1 is the internal structure signal of non-maintaining hermetically sealed cut-out cover plate valve closed mode provided in an embodiment of the present invention
Figure；
Fig. 2 is the close-up schematic view at location A in Fig. 1；
Fig. 3 is the close-up schematic view at B location in Fig. 1；
Fig. 4 is the internal structure signal of non-maintaining hermetically sealed cut-out cover plate valve opening provided in an embodiment of the present invention
Figure.
In figure, the implication of each symbol is as follows：
1 valve rod, 2 valve covers, 3 high pressure gas pipelines, 4 it is anti-in leakage chambers, 5 anti-leakage chambers, 6 rectangle breather lines, 7 every
Plate, 8 inlet plenums, 9 exhaust chambers, 10 drive devices, 11 first gaps, 12 second gaps, 13 spileholes, 14 bearings.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, below in conjunction with accompanying drawing, the present invention is entered
Row is further described.It should be appreciated that embodiment described herein is not used to only to explain the present invention
Limit the present invention.
As Figure 1-4, the embodiments of the invention provide the non-maintaining hermetically sealed cut-out cover plate valve of one kind, including：Valve rod 1,
Valve cover 2, high pressure gas pipeline 3, anti-interior leakage chamber 4 and anti-leakage chamber 5, high pressure gas pipeline 3 in preventing respectively with leaking chamber 4 and anti-
Leakage chamber 5 is connected, and valve rod 1 is arranged on rectangle breather line 6, and rectangle breather line 6 is divided into inlet plenum 8 by dividing plate 7
With exhaust chamber 9, the outside that one end of valve rod 1 is located at inlet plenum 8 is connected with drive device 10, the side wall of valve rod 1 and inlet plenum 8 it
Between be provided with the first gap 11, the other end of valve rod 1 is located in exhaust chamber 9 through dividing plate 7, and steam vent, valve are offered on dividing plate 7
Cover plate 2 is arranged on valve rod 1, and valve cover 2 is located in inlet plenum 8, and valve cover 2 is just set to steam vent, and valve cover 2 can be with valve
Bar 1 is moved left and right in inlet plenum 8, when valve cover 2 is located at low order end, is set between the side wall of valve cover 2 and anti-interior leakage chamber 4
There is the second gap 12；
Anti- leakage chamber 5 is located at the outside of inlet plenum 8, and anti-leakage chamber 5 is connected with the first gap 11；
Leakage chamber 4 is located at the steam vent in preventing, anti-interior leakage chamber 4 is connected with the second gap 12.
The operation principle of said structure is：
In use, drive device can be moved with ovable valve stem left and right horizontal, and valve rod drives valve cover left and right horizontal to move
Dynamic, when valve cover is to left movement, during away from steam vent, gas in inlet plenum can be from steam vent enters exhaust chamber, and from row
The exhaust outlet discharge that air chamber is set, into the equipment being connected or in air, when valve cover is moved right, close to steam vent and
During positioned at low order end, gases at high pressure are inputted by high pressure gas pipeline, gases at high pressure enter in anti-in leakage chamber from high pressure gas pipeline,
Leakage chamber is connected with the second gap in due to preventing, then high pressure gas can enter the second gap, now, the second gap from the anti-interior chamber that leaks
It is filled with high pressure gas, and inlet plenum and exhaust chamber is flowed to from the second gap, because the second gap mesohigh stream pressure is higher than
Gas pressure in inlet plenum and exhaust chamber, so, the high pressure draught in the second gap can constantly flow to inlet plenum and exhaust
Room, and then by high pressure air curtain flow direction each other gas mixing can not possibly occur for the gas in inlet plenum and exhaust chamber.So,
When valve cover is located at low order end, valve cover covers steam vent, meanwhile, realized by the second gap between inlet plenum and exhaust chamber
Sealing gland, it is to avoid there is gas inner leakage.
In addition, no matter valve cover is to left movement or moves right, also or inactive state is presented, all by gases at high pressure
By high pressure gas pipeline be input to it is anti-leakage chamber in, due to it is anti-leakage chamber be connected with the first gap, then high pressure gas can from prevent
The chamber that leaks outside enters the first gap so that the first gap is full of high pressure gas, and enters inlet plenum and external world's sky by the first gap
In gas.And in view of the pressure of high pressure draught is higher than inlet plenum and extraneous gas pressure, high pressure draught can be constantly into entering
In air chamber and ambient atmosphere, and the gas and extraneous gas in inlet plenum can not enter anti-leakage chamber, and pass through anti-leakage
Chamber is mutually mixed, so as to realize the sealing gland between inlet plenum and outside air by the first gap, effectively prevent air inlet
Indoor gas is entered in atmospheric environment by the first gap, realizes zero leakage.
In said structure, because the first gap and the second gap location are hermetic seal, valve rod with rectangle breather line (quite
In valve body) side wall between it is contactless, it is also contactless between valve cover and rectangle breather line (equivalent to valve body), so as to avoid
Valve rod and valve cover constantly rub between rectangle breather line (equivalent to valve body) in continuous motion process, from
And wear and tear, so, valve rod, valve cover and rectangle breather line (equivalent to valve body) are realized non-maintaining without changing.
In addition, valve provided in an embodiment of the present invention by the use of the rectangle breather line at scene wooden partition as valve body, can be with
Effectively reduce cost；Meanwhile, valve cover can be designed as demountable structure, and in-site installation is easy to use.
In the present embodiment, the thickness in the first gap 11 is less than 2mm.
First gap must have a certain distance, in order to which blanket gas forms higher-pressure region by and the region.
The size in first gap is less than 2mm, can effectively reduce the area of passage in the first gap, and ensureing blanket gas, (pressure is high
) all the time on the premise of rectangle breather line and extraneous (pressure is low) flowing, reduce the flow of blanket gas.It is finally reached logical
A small amount of blanket gas is crossed, the purpose of valve interior air-flow (pressure is low) zero leakage (leakage) is realized.
In the present embodiment, the thickness in the second gap 12 is less than 2mm.
Second gap must have a certain distance, in order to which blanket gas forms higher-pressure region by and the region.
The size in second gap is less than 2mm, can effectively reduce the area of passage in the second gap, and ensureing blanket gas, (pressure is high
) all the time on the premise of inlet plenum and exhaust chamber (pressure is low) flowing, reduce the flow of blanket gas.It is finally reached by few
Blanket gas is measured, the purpose of the valve cover left and right sides air-flow (pressure is low) zero leakage (interior leakage) is realized.
In a preferred embodiment of the invention, leakage chamber 4 is annular compartment, the width x of the annular compartment in preventing
Thickness is：50x60mm.
The effect of annular compartment is, by blanket gas, to be evenly supplied to all spileholes, and its area of section have to be larger than institute
There is the summation of stingy hole area, so just can guarantee that the pressure in the second gap is consistently higher than the pressure of the valve cover left and right sides.
In another preferred embodiment of the invention, the annular compartment is located on the wall of the side of the second gap 12 and set
It is equipped with spilehole 13.
A diameter of 4-6mm of spilehole 13, all spileholes 13 are evenly arranged on the wall of the annular compartment, and
The distance between two adjacent spileholes 13 are 35-40mm.
In actual use, groove can be opened up on the wall of annular compartment, and opens up on groove spilehole,
Spilehole is evenly distributed in the groove of annular compartment upper wall surface, and spacing distance is 35-40mm, can be caused blanket gas, be passed through
Each spilehole is equably reached in the groove of annular compartment upper wall surface, and is equably reached by the annular groove between second
Gap, finally flows so that blanket gas reaches airtight out of above and below the second gap two lateral inlet plenums and exhaust chamber (pressure is low)
The effect of envelope.
In the present embodiment, the diameter of valve cover 2 is more than the diameter of the steam vent and equal to the external diameter of the annular compartment.
Said structure, can directly determine the sealability in the second gap, can also determine the sealing effect of valve cover both sides
Really.The diameter of valve cover and the external diameter of annular compartment are identical in the present invention, so that the region in the second gap is maximum so that
The sealability in the second gap is most strong, and then so that the sealing effectiveness of the second gap left and right sides is optimal.
In the present embodiment, anti-interior leakage chamber 4 may be mounted on dividing plate 7.
In the present embodiment, anti-interior leakage chamber can be fixed on dividing plate by bolt etc..
As will be understood by the skilled person in the art, it can also carry out leaking the detachable of chamber in anti-using other modes
Connection.
Non-maintaining hermetically sealed cut-out cover plate valve provided in an embodiment of the present invention, can also include the bearing of bearing 14,14 can be with
It is separately mounted on inlet plenum 8 and exhaust chamber 9, valve rod 1 is arranged on bearing 14.
In use, drive device band ovable valve stem carries out left right horizontal movement to said structure, and is carried out by bearing
Slide, during motion, drive valve cover to carry out left right horizontal movement in inlet plenum, when valve cover is to left movement, far
During from dividing plate, the gas of inlet plenum is entered in exhaust chamber by steam vent, and when valve cover is moved right, close dividing plate simultaneously reaches most
During right-hand member, steam vent is covered by valve cover, and the second gap between valve cover and anti-interior leakage chamber sidewall is carried out by high pressure gas
Sealing, so as to realize the hermetic seal of valve.
Wherein, the bearing used in the present embodiment is self-lubricating, resistant to elevated temperatures sliding bearing, with existing with sealing ring
Valve (200 DEG C) is compared, and its temperature tolerance is more preferably (400 DEG C).
In the present embodiment, drive device 10 can be cylinder.
Cylinder horizontal movement drives valve rod, and then drives valve cover, it is only necessary to overcome frictional force, without overcoming valve certainly
Weight, flexible operation is fast, steadily, contactless.
By using above-mentioned technical proposal disclosed by the invention, following beneficial effect has been obtained：The embodiment of the present invention is carried
A kind of non-maintaining hermetically sealed cut-out cover plate valve of confession, by setting the anti-leakage chamber being connected with the first gap in the outside of inlet plenum
Room, the anti-interior leakage chamber being connected with the second gap is set at the steam vent of valve body, is realized between inlet plenum and outside air
Sealing gland, and the sealing gland between inlet plenum and exhaust chamber, it is to avoid the leakage of gas and interior leakage occur；And because valve rod is with entering
It is between the side wall of air chamber contactless, it is also contactless between valve cover and dividing plate, it is to avoid valve rod and valve cover wear and tear, realize
It is non-maintaining；Meanwhile, the wooden partition by the use of live rectangle breather line can effectively reduce cost as valve body.
Described above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
Depending on protection scope of the present invention.
Claims (10)
1. a kind of non-maintaining hermetically sealed cut-out cover plate valve, it is characterised in that including：Valve rod, valve cover, high pressure gas pipeline, it is anti-in
Chamber and anti-leakage chamber are leaked, the high pressure gas pipeline is connected with the anti-interior leakage chamber and the anti-leakage chamber respectively, institute
Valve rod is stated on rectangle breather line, the rectangle breather line is divided into inlet plenum and exhaust chamber by dividing plate, described
The outside that one end of valve rod is located at the inlet plenum is connected with drive device, is set between the side wall of the valve rod and the inlet plenum
The first gap is equipped with, the other end of the valve rod is located in the exhaust chamber through the dividing plate, the row of offering on the dividing plate
Stomata, the valve cover is arranged on the valve rod, and the valve cover is located in the inlet plenum, and the valve cover is just to institute
Steam vent setting is stated, the valve cover can be moved left and right with the valve rod in the inlet plenum, and the valve cover is located at most right
During end, the second gap is provided between the side wall of the valve cover and the anti-interior leakage chamber；
The anti-leakage chamber is located at the outside of the inlet plenum, and the anti-leakage chamber is connected with first gap；
Described to prevent that interior leakage chamber is located at the steam vent, the anti-interior chamber that leaks is connected with second gap.
2. non-maintaining hermetically sealed cut-out cover plate valve according to claim 1, it is characterised in that the thickness in first gap
Less than 2mm.
3. non-maintaining hermetically sealed cut-out cover plate valve according to claim 1, it is characterised in that the thickness in second gap
Less than 2mm.
4. non-maintaining hermetically sealed cut-out cover plate valve according to claim 1, it is characterised in that the anti-interior leakage chamber is ring
Shape chamber, the width x thickness of the annular compartment is：50x60mm.
5. non-maintaining hermetically sealed cut-out cover plate valve according to claim 4, it is characterised in that the annular compartment is located at institute
Spilehole is provided with the wall for stating the second gap side.
6. non-maintaining hermetically sealed cut-out cover plate valve according to claim 5, it is characterised in that the spilehole it is a diameter of
4-6mm, all spileholes are evenly arranged on the wall of the annular compartment, and two adjacent spileholes it
Between distance be 35-40mm.
7. non-maintaining hermetically sealed cut-out cover plate valve according to claim 4, it is characterised in that the diameter of the valve cover is big
Diameter in the steam vent and the external diameter equal to the annular compartment.
8. non-maintaining hermetically sealed cut-out cover plate valve according to claim 1, it is characterised in that the anti-interior leakage chamber is installed
On the dividing plate.
9. non-maintaining hermetically sealed cut-out cover plate valve according to claim 1, it is characterised in that also including bearing, the axle
Hold and be separately mounted on the inlet plenum and the exhaust chamber, the valve rod is arranged on the bearing.
10. non-maintaining hermetically sealed cut-out cover plate valve according to claim 1, it is characterised in that the drive device is gas
Cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710693932.2A CN107255171B (en) | 2017-08-14 | 2017-08-14 | Maintenance-free full-sealed cut-off cover plate valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710693932.2A CN107255171B (en) | 2017-08-14 | 2017-08-14 | Maintenance-free full-sealed cut-off cover plate valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107255171A true CN107255171A (en) | 2017-10-17 |
| CN107255171B CN107255171B (en) | 2023-09-05 |
Family
ID=60026814
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710693932.2A Active CN107255171B (en) | 2017-08-14 | 2017-08-14 | Maintenance-free full-sealed cut-off cover plate valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107255171B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB782836A (en) * | 1954-10-22 | 1957-09-11 | Glenfield & Kennedy Ltd | Improvements in or relating to butterfly valves |
| CN85200166U (en) * | 1985-04-01 | 1986-01-29 | 中国科学院金属研究所 | Airseal high-temperature stop valve |
| CN202812245U (en) * | 2012-09-27 | 2013-03-20 | 扬州高标机械有限公司 | Elastic gas sealing butterfly valve for waste heat power generation |
| CN203067800U (en) * | 2013-02-06 | 2013-07-17 | 鞍山亨通阀门有限公司 | Sealing device for negative-pressure butterfly valve for recovering converter gas |
| CN106090256A (en) * | 2016-08-17 | 2016-11-09 | 上海开纯洁净室技术工程有限公司 | Floating type pressure reduction confined gas valve |
| CN206268473U (en) * | 2016-12-12 | 2017-06-20 | 江苏大信环境科技有限公司 | A kind of zero leakage sealing gland playing card valve |
| CN207080619U (en) * | 2017-08-14 | 2018-03-09 | 维珂瑞（北京）环境科技有限公司 | A kind of non-maintaining hermetically sealed cut-out cover plate valve |
-
2017
- 2017-08-14 CN CN201710693932.2A patent/CN107255171B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB782836A (en) * | 1954-10-22 | 1957-09-11 | Glenfield & Kennedy Ltd | Improvements in or relating to butterfly valves |
| CN85200166U (en) * | 1985-04-01 | 1986-01-29 | 中国科学院金属研究所 | Airseal high-temperature stop valve |
| CN202812245U (en) * | 2012-09-27 | 2013-03-20 | 扬州高标机械有限公司 | Elastic gas sealing butterfly valve for waste heat power generation |
| CN203067800U (en) * | 2013-02-06 | 2013-07-17 | 鞍山亨通阀门有限公司 | Sealing device for negative-pressure butterfly valve for recovering converter gas |
| CN106090256A (en) * | 2016-08-17 | 2016-11-09 | 上海开纯洁净室技术工程有限公司 | Floating type pressure reduction confined gas valve |
| CN206268473U (en) * | 2016-12-12 | 2017-06-20 | 江苏大信环境科技有限公司 | A kind of zero leakage sealing gland playing card valve |
| CN207080619U (en) * | 2017-08-14 | 2018-03-09 | 维珂瑞（北京）环境科技有限公司 | A kind of non-maintaining hermetically sealed cut-out cover plate valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107255171B (en) | 2023-09-05 |
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