CN104676031B - Two way seal knife gate valve with self sealss and elastic compensating valve seat - Google Patents
Two way seal knife gate valve with self sealss and elastic compensating valve seat Download PDFInfo
- Publication number
- CN104676031B CN104676031B CN201510070866.4A CN201510070866A CN104676031B CN 104676031 B CN104676031 B CN 104676031B CN 201510070866 A CN201510070866 A CN 201510070866A CN 104676031 B CN104676031 B CN 104676031B
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- Prior art keywords
- valve
- valve seat
- pedestal
- valve body
- spring
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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
- 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
- F16K3/16—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 with special arrangements for separating the sealing faces or for pressing them together
- F16K3/18—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 with special arrangements for separating the sealing faces or for pressing them together by movement of the closure members
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K3/00—Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing
- F16K3/30—Details
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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
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sliding Valves (AREA)
Abstract
The present invention relates to a kind of knife gate valve, the two way seal knife gate valve specifically with self sealss and elastic compensating valve seat belongs to knife gate valve technical field.It includes valve body, and the transit chamber both sides of valve body are provided with trim ring, and trim ring inner side is provided with pedestal, spring is provided between pedestal and trim ring, and spring compresses pedestal.Pedestal is provided with the valve seat of connection T-shaped in the valve seat groove of T-shaped, valve seat groove towards knife plate side, and by spring compression, valve seat inner side can be in close contact knife plate.The present invention utilizes valve seat stress surface product moment, it is ensured that valve seat is pressed towards knife plate all the time；Set up compression spring so that even if valve remains to sealing very well under low-pressure work shape.Spring isolation structure is effectively isolated compression spring, it is to avoid slurry, containing the impure filter medium clogging compression spring mounting hole such as particle, causes compression spring and dead.
Description
Technical field
The present invention relates to a kind of knife gate valve, the two way seal disconnecting link specifically with self sealss and elastic compensating valve seat
Valve, belongs to knife gate valve technical field.
Background technology
Knife gate valve, is also called blade type flat gate valve, because its simple structure, installing space are small, lightweight, more and more
It is used for the regulation of various low pressure operating modes and cut-out；Simultaneously because valve body is thin, flow resistance is small, be particularly well-suited to all kinds of powders, slurry,
Occasion containing particle and containing suspension medium.
In many chemical enterprises, knife gate valve not only as finished product outlet valve, is also applied to the pan feeding valve of reactor.Medium
Knife gate valve is driven across by pump and flows to reactor, medium is cut off during valve closing, and when reactor reacts, pressure rise is situated between
Matter pressure reversal acts on knife gate valve, and knife gate valve needs reversely to seal.The process knife gate valve acts frequently, two way seal requirement
Height, and medium is often slurry form, the anti-blocking and anti-wear performance requirement for knife gate valve is high.
The main restricting element of knife gate valve is the parallel knife plate in a two sides, and switch motion direction and the medium of knife plate are flowed to
Perpendicular, main seal pattern is knife plate rigid seal, knife plate self sealss.The wedge shape that knife plate rigid seal passes through knife plate bottom
Knife plate is pressed to valve seat by angle, pressure, and the structure has good one-way sealing property, but two way seal effect is poor.Knife plate is from close
Knife plate is pressed to valve seat by envelope by pressure medium, and the structure valve seat has a preferable sealing property using quality of rubber materials, but
The operating modes such as particle, slurry are not wear-resistant due to rubber, and the life-span is shorter；Four fluorine class material valve seats are such as used, in low-pressure work
Because seal pressure is small under condition, sealing effectiveness is poor.Both the above sealing structure can cause knife plate radial direction position in seal process
Move, be easily caused valve stuffing box leakage.
The content of the invention
It is an object of the present invention to overcome the above deficiencies, so as to provide a kind of with self sealss and elastic compensating valve seat
Two way seal knife gate valve, substantially increase sealing property.
According to the technical scheme that the present invention is provided, the two way seal knife gate valve with self sealss and elastic compensating valve seat includes
Valve body, valve body lower portion is provided with the transit chamber of left and right insertion, and medium can flow through along the transit chamber of valve body, is provided with body cavity
Knife plate, knife plate can be slided up and down so as to control the opening and closing of transit chamber along body cavity, it is characterized in that：Valve body it is logical
Cross chamber both sides and be provided with trim ring, trim ring inner side is provided with pedestal, spring is provided between pedestal and trim ring, and spring compresses pedestal；Pedestal
The valve seat of connection T-shaped in the valve seat groove of T-shaped, valve seat groove is provided with towards knife plate side, by spring compression, valve seat inner side can be tight
Contiguity contact knife plate.
Further, the first sealing ring is provided between trim ring and pedestal, the second sealing ring is provided between pedestal and valve body.
Further, sealed diameter of the sealed diameter of the first sealing ring more than valve seat.
Further, side pad is provided between trim ring and valve body.
Further, body base welds three pads of semi-cylindrical, and three pads are circumferentially uniformly distributed in direction.
Further, body cavity top is provided with stuffing-box, and airtight and watertight padding is provided with stuffing-box, and airtight and watertight padding upper end passes through
The gland for being connected to valve body upper end is compressed.
Compared with the prior art the present invention has advantages below：
Simple structure of the present invention, compact, reasonable, present invention utilization valve seat stress surface product moment, it is ensured that valve seat is pressed towards all the time
Knife plate；Set up compression spring so that even if valve remains to sealing very well under low-pressure work shape；Spring isolation structure is effectively isolated
Compression spring, it is to avoid slurry, containing the impure filter medium clogging compression spring mounting hole such as particle, causes compression spring and dead；Pedestal
The effective sealed diameter of second sealing ring of lower end is more than the effective sealed diameter of valve seat, and pedestal forefront pressure is more than rear end pressure, is situated between
Valve seat is pressed to knife plate by matter pressure all the time, and pressure is bigger, and sealing property is better；Pad is mounted between valve body and trim ring, is improved
The sealing property of valve, it is to avoid medium leaks outside.
Brief description of the drawings
Fig. 1 is front view of the present invention.
Fig. 2 is enlarged drawing at A in Fig. 1.
Fig. 3 is pad distribution map.
Description of reference numerals：1- valve bodies, 2- knife plates, 3- transit chambers, 4- airtight and watertight paddings, 5- glands, 6- trim rings, 7- bases
Seat, 8- valve seats, 9- springs, 10- pads, the sealing rings of 11- first, the sealing rings of 12- second, 13- sides pad.
Specific embodiment
The present invention will be further described with reference to the embodiment in accompanying drawing below：
As shown in Fig. 1 ~ 3, the invention mainly comprises valve body 1, the bottom of valve body 1 is provided with the transit chamber 3 of left and right insertion, medium energy
Enough transit chambers 3 along valve body 1 flow through.Knife plate 2 is provided with the inner chamber of valve body 1, knife plate 2 can be slided up and down along the inner chamber of valve body 1
So as to control the opening and closing of transit chamber 3.
The both sides of transit chamber 3 of valve body 1 are provided with trim ring 6, and the inner side of trim ring 6 is provided with pedestal 7, bullet is provided between pedestal 7 and trim ring 6
Spring 9, spring 9 compresses pedestal 7.Pedestal 7 is provided with the valve seat of connection T-shaped in the valve seat groove of T-shaped, valve seat groove towards the side of knife plate 2
8, compressed by spring 7, the inner side of valve seat 8 can be in close contact knife plate 2, so as to realize the sealing of knife plate 2.Valve seat and pedestal pass through
The valve seat groove connection of T-shaped structure, its simple structure, combination reliability, accurate positioning, valve seat is difficult for drop-off, and pedestal has to valve seat
Strengthen and protective effect, extend the service life of valve seat.Valve seat uses spring compression, it is ensured that in any working condition pressure lower valve base
Can be pressed on knife plate by tight, improve sealing property.
The first sealing ring 11 is provided between the trim ring 6 and pedestal 7, the second sealing ring is provided between pedestal 7 and valve body 1
12, with medium be adequately isolated spring by the first sealing ring 11 and the second sealing ring 12, it is to avoid slurry, containing the impure medium such as particle
Spring blocking mounting hole, causes spring simultaneously dead.The sealed diameter of first sealing ring 11 is more than the sealed diameter of valve seat 8, base
End pressure is more than outer end pressure in seat 7, and valve seat is pressed to knife plate by pressure medium all the time, and pressure is bigger, and sealing property is better.
Side pad 13 is provided between the trim ring 6 and valve body 1, the sealing property of valve is improve, it is to avoid medium leaks outside.
The valve body 1 bottom welding, three pads of semi-cylindrical 10, three pads 10 are circumferentially uniformly distributed in direction.Pad
Piece 10 ensures that knife plate lower end is spacing spacing to put, it is to avoid knife plate lower end contacts with body base face, causes slurry class medium by knife
Plate is killed in body base, valve blockage.
The inner chamber top of the valve body 1 is provided with stuffing-box, and airtight and watertight padding 4 is provided with stuffing-box, and the upper end of airtight and watertight padding 4 is by connecting
The gland 5 for being connected on the upper end of valve body 1 is compressed.
Operation principle of the invention is as follows：Medium enters body cavity from disconnecting link valve inlet, by the phase of knife plate and valve seat
To the mobile control to rate-of flow, the flow for meeting technique is reached, eventually enter into next technological process.
Simple structure of the present invention, compact, reasonable, present invention utilization valve seat stress surface product moment, it is ensured that valve seat is pressed towards all the time
Knife plate；Set up compression spring so that even if valve remains to sealing very well under low-pressure work shape；Spring isolation structure is effectively isolated
Compression spring, it is to avoid slurry, containing the impure filter medium clogging compression spring mounting hole such as particle, causes compression spring and dead；Pedestal
The effective sealed diameter of second sealing ring of lower end is more than the effective sealed diameter of valve seat, and pedestal forefront pressure is more than rear end pressure, is situated between
Valve seat is pressed to knife plate by matter pressure all the time, and pressure is bigger, and sealing property is better；Pad is mounted between valve body and trim ring, is improved
The sealing property of valve, it is to avoid medium leaks outside.
Claims (1)
1. a kind of two way seal knife gate valve with self sealss and elastic compensating valve seat, including valve body（1）, valve body（1）Bottom sets
There is the transit chamber of left and right insertion（3）, medium can be along valve body（1）Transit chamber（3）Flow through, valve body（1）Knife is provided with inner chamber
Plate（2）, knife plate（2）Can be along valve body（1）Inner chamber is slided up and down so as to control transit chamber（3）Opening and closing, its feature
It is：Valve body（1）Transit chamber（3）Both sides are provided with trim ring（6）, trim ring（6）Inner side is provided with pedestal（7）, pedestal（7）And trim ring（6）
Between be provided with spring（9）, spring（9）By pedestal（7）Compress；Pedestal（7）Towards knife plate（2）Side is provided with the valve seat groove of T-shaped, valve
The valve seat of connection T-shaped in seat slot（8）, by spring（9）Compress, valve seat（8）Inner side can be in close contact knife plate（2）；
The trim ring（6）And pedestal（7）Between be provided with the first sealing ring（11）, pedestal（7）And valve body（1）Between to be provided with second close
Seal（12）；First sealing ring（11）Sealed diameter be more than valve seat（8）Sealed diameter；The trim ring（6）And valve body
（1）Between be provided with side pad（13）；The valve body（1）Three pads of semi-cylindrical of bottom welding（10）, three pads（10）
Circumferentially direction is uniformly distributed；The valve body（1）Inner chamber top is provided with stuffing-box, and airtight and watertight padding is provided with stuffing-box（4）, sealing
Filler（4）Upper end is by being connected to valve body（1）The gland of upper end（5）Compress.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510070866.4A CN104676031B (en) | 2015-02-10 | 2015-02-10 | Two way seal knife gate valve with self sealss and elastic compensating valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510070866.4A CN104676031B (en) | 2015-02-10 | 2015-02-10 | Two way seal knife gate valve with self sealss and elastic compensating valve seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104676031A CN104676031A (en) | 2015-06-03 |
| CN104676031B true CN104676031B (en) | 2017-06-06 |
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ID=53311458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510070866.4A Active CN104676031B (en) | 2015-02-10 | 2015-02-10 | Two way seal knife gate valve with self sealss and elastic compensating valve seat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104676031B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107504209A (en) * | 2017-09-20 | 2017-12-22 | 圣博莱阀门有限公司 | Detachable single valve seat two-way sealing knife gate valve |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4562992A (en) * | 1983-12-26 | 1986-01-07 | Fuji Seiko Kabushiki Kaisha | Seal device for gate valve |
| CN202501029U (en) * | 2012-02-14 | 2012-10-24 | 温州市铁龙阀门有限公司 | A compensable bidirectional sealed gate valve |
| CN202545860U (en) * | 2012-01-18 | 2012-11-21 | 山东中力机械制造有限公司 | Loop gate valve |
| CN102829203A (en) * | 2012-09-12 | 2012-12-19 | 无锡杰尔压缩机有限公司 | Seal structure of diamond valve |
| CN204533612U (en) * | 2015-02-10 | 2015-08-05 | 无锡智能自控工程股份有限公司 | There is the two way sealed knife gate valve of selfsealings and elastic compensating valve seat |
-
2015
- 2015-02-10 CN CN201510070866.4A patent/CN104676031B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4562992A (en) * | 1983-12-26 | 1986-01-07 | Fuji Seiko Kabushiki Kaisha | Seal device for gate valve |
| CN202545860U (en) * | 2012-01-18 | 2012-11-21 | 山东中力机械制造有限公司 | Loop gate valve |
| CN202501029U (en) * | 2012-02-14 | 2012-10-24 | 温州市铁龙阀门有限公司 | A compensable bidirectional sealed gate valve |
| CN102829203A (en) * | 2012-09-12 | 2012-12-19 | 无锡杰尔压缩机有限公司 | Seal structure of diamond valve |
| CN204533612U (en) * | 2015-02-10 | 2015-08-05 | 无锡智能自控工程股份有限公司 | There is the two way sealed knife gate valve of selfsealings and elastic compensating valve seat |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104676031A (en) | 2015-06-03 |
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