CN104676031A - Two-way sealed knife gate valve with self-sealing and elastic compensation valve seats - Google Patents
Two-way sealed knife gate valve with self-sealing and elastic compensation valve seats Download PDFInfo
- Publication number
- CN104676031A CN104676031A CN201510070866.4A CN201510070866A CN104676031A CN 104676031 A CN104676031 A CN 104676031A CN 201510070866 A CN201510070866 A CN 201510070866A CN 104676031 A CN104676031 A CN 104676031A
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- China
- Prior art keywords
- valve
- valve seat
- valve body
- knife gate
- knife
- 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
- 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 invention relates to a knife gate valve, in particular to a two-way sealed knife gate valve with self-sealing and elastic compensation valve seats, and belongs to the technical field of the knife gate valve. The knife gate valve comprises a valve body, the two sides of a through cavity of the valve body are provided with pressing rings, bases are arranged in the pressing rings and springs used for pressing the bases are arranged between the bases and the pressing rings; the sides, facing a knife board, of the bases are provided with T-shaped valve seat slots in which T-shaped valve seats are connected, and the inner sides of the valve seats can be closely in contact with the knife board by pressing the springs. According to the knife gate valve provided by the invention, the valve seat can be enabled to press to the knife board all the time due to the poor stressed area of the valve seat; furthermore, the valve can be sealed well at the low pressure working station by additionally installing the compression springs; in addition, the compression springs can be effectively isolated by the spring isolation structure, therefore the compression springs can be prevented from being locked because compression spring mounting holes are blocked by a sizing agent, non-pure mediums containing particulates and the like.
Description
Technical field
The present invention relates to a kind of knife gate valve, there is the two way sealed knife gate valve of selfsealings and elastic compensating valve seat specifically, belong to knife gate valve technical field.
Background technique
Knife gate valve, is also called blade type plate valve, because its structure is simple, installing space is little, lightweight, is more and more used to adjustment and the cut-out of various low pressure operating mode; Simultaneously because valve body is thin, flow resistance is little, be specially adapted to all kinds of powder, slurry, containing particle and the occasion containing suspended matter medium.
At a lot of chemical enterprise, knife gate valve is not only used as finished product discharge valve, is also applied to the pan feeding valve of reactor.Medium is driven across knife gate valve by pump and flows to reactor, cuts off medium during valve closing, and when reactor reacts, pressure raises, and pressure medium acting in opposition is in knife gate valve, and knife gate valve needs oppositely to seal.This process knife gate valve acts frequently, and two way sealed requires high, and medium is often slurry form, requires high for the anti-blocking of knife gate valve and wear-resisting property.
The main throttle element of knife gate valve is the parallel knife plate in a two sides, and the switch motion direction of knife plate and MEDIA FLOW are to perpendicular, and main seal pattern is knife plate rigid seal, knife plate selfsealings.Knife plate rigid seal is by the key groove bottom knife plate, and force knife plate to press to valve seat, this structure has good one-way sealing property, but two way sealed weak effect.Knife plate is pressed to valve seat by pressure medium by knife plate selfsealings, and this structure valve seat adopts quality of rubber materials to have good sealability, but in the operating mode such as particle, slurry because rubber product is not wear-resistant, the life-span is shorter; As adopted tetrafluoro class material valve seat, because seal pressure is little under low-pressure operating mode, sealing effect is poor.Above two kinds of sealing configurations all can cause knife plate radial displacement in seal process, easily cause valve stuffing box to leak outside.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, thus a kind of two way sealed knife gate valve with selfsealings and elastic compensating valve seat is provided, substantially increase sealability.
According to technological scheme provided by the invention, the two way sealed knife gate valve with selfsealings and elastic compensating valve seat comprises valve body, valve body lower portion be provided with left and right through pass through chamber, medium can flowing through by chamber along valve body, and be provided with knife plate in body cavity, knife plate can slide up and down along body cavity thus control the opening and closing by chamber, it is characterized in that: valve body be provided with trim ring by both sides, chamber, be provided with pedestal inside trim ring, be provided with spring between pedestal and trim ring, pedestal compresses by spring; Seat surface is provided with the valve seat groove of T-shaped to knife plate side, connect the valve seat of T-shaped in valve seat groove, by spring compression, and can close contact knife plate inside valve seat.
Further, between trim ring and pedestal, be provided with the first seal ring, between pedestal and valve body, be provided with the second seal ring.
Further, the sealed diameter of the first seal ring is greater than the sealed diameter of valve seat.
Further, side pad is provided with between trim ring and valve body.
Further, body base welds three semi-cylindrical pads, and three pads are circumferentially uniformly distributed in direction.
Further, body cavity top is provided with stuffing box, is provided with stuffing box packing in stuffing box, and stuffing box packing upper end is compressed by the Gland being connected to valve body upper end.
Compared with the prior art the present invention has the following advantages:
Structure of the present invention is simple, compact, reasonable, and the present invention utilizes valve seat stress surface product moment, guarantees that valve seat is pressed towards knife plate all the time; Set up Compress Spring, even if make valve still can seal very well under low-pressure work shape; Spring isolation structure effectively isolates Compress Spring, avoids slurry, containing impure filter medium clogging Compress Spring mounting holes such as particles, causes Compress Spring also dead; Second seal ring effective sealing diameter of pedestal lower end is greater than valve seat effective sealing diameter, and pedestal forefront pressure is greater than rear end pressure, and valve seat is pressed to knife plate by pressure medium all the time, and pressure is larger, and sealability is better; Pad is installed between valve body and trim ring, has improve the sealability of valve, avoided medium to leak outside.
Accompanying drawing explanation
Fig. 1 is plan view of the present invention.
Fig. 2 is A place enlarged view in Fig. 1.
Fig. 3 is pad distribution map.
Description of reference numerals: 1-valve body, 2-knife plate, 3-are by chamber, 4-stuffing box packing, 5-Gland, 6-trim ring, 7-pedestal, 8-valve seat, 9-spring, 10-pad, 11-first seal ring, 12-second seal ring, 13-side pad.
Embodiment
Embodiment in is by reference to the accompanying drawings further described by the present invention below:
As shown in Fig. 1 ~ 3, the present invention mainly comprises valve body 1, valve body 1 bottom be provided with left and right through by chamber 3, medium can flowing through by chamber 3 along valve body 1.Be provided with knife plate 2 in valve body 1 inner chamber, knife plate 2 can slide up and down along valve body 1 inner chamber thus control the opening and closing by chamber 3.
Valve body 1 be provided with trim ring 6 by both sides, chamber 3, be provided with pedestal 7 inside trim ring 6, be provided with spring 9 between pedestal 7 and trim ring 6, pedestal 7 compresses by spring 9.Pedestal 7 is provided with the valve seat groove of T-shaped towards knife plate 2 side, connects the valve seat 8 of T-shaped in valve seat groove, is compressed by spring 7, can close contact knife plate 2 inside valve seat 8, thus realizes the sealing of knife plate 2.Valve seat is connected with the valve seat groove of pedestal by T-shaped structure, and its structure is simple, combination is reliable, accurate positioning, valve seat difficult drop-off, and pedestal has reinforcement and protective action to valve seat, extends the working life of valve seat.Valve seat adopts spring compression, ensures all to be pressed on knife plate by tight at any working condition pressure lower valve base, improves sealability.
The first seal ring 11 is provided with between described trim ring 6 and pedestal 7, the second seal ring 12 is provided with between pedestal 7 and valve body 1, spring and medium are fully isolated by the first seal ring 11 and the second seal ring 12, avoid slurry, containing impure filter medium clogging spring mounting holes such as particles, cause spring also dead.The sealed diameter of described first seal ring 11 is greater than the sealed diameter of valve seat 8, and in pedestal 7, end pressure is greater than outer end pressure, and valve seat is pressed to knife plate by pressure medium all the time, and pressure is larger, and sealability is better.
Be provided with side pad 13 between described trim ring 6 and valve body 1, improve the sealability of valve, avoid medium to leak outside.
The semi-cylindrical pad of described valve body 1 bottom welding three 10, three pads 10 are circumferentially uniformly distributed in direction.Pad 10 guarantees that knife plate lower end is spacing spacing for putting, and avoids knife plate lower end to contact with body base face, causes slurry class medium to be killed at body base by knife plate, valve blockage.
Described valve body 1 inner chamber top is provided with stuffing box, is provided with stuffing box packing 4 in stuffing box, and stuffing box packing 4 upper end is compressed by the Gland 5 being connected to valve body 1 upper end.
Working principle of the present invention is as follows: medium enters body cavity from knife gate valve entrance, by the relative movement of knife plate and valve seat to the control of rate-of flow, reaches the flow meeting technique, finally enters next technological process.
Structure of the present invention is simple, compact, reasonable, and the present invention utilizes valve seat stress surface product moment, guarantees that valve seat is pressed towards knife plate all the time; Set up Compress Spring, even if make valve still can seal very well under low-pressure work shape; Spring isolation structure effectively isolates Compress Spring, avoids slurry, containing impure filter medium clogging Compress Spring mounting holes such as particles, causes Compress Spring also dead; Second seal ring effective sealing diameter of pedestal lower end is greater than valve seat effective sealing diameter, and pedestal forefront pressure is greater than rear end pressure, and valve seat is pressed to knife plate by pressure medium all the time, and pressure is larger, and sealability is better; Pad is installed between valve body and trim ring, has improve the sealability of valve, avoided medium to leak outside.
Claims (6)
1. one kind has the two way sealed knife gate valve of selfsealings and elastic compensating valve seat, comprise valve body (1), valve body (1) bottom be provided with left and right through by chamber (3), medium can flow through along the chamber (3) of passing through of valve body (1), knife plate (2) is provided with in valve body (1) inner chamber, knife plate (2) can slide up and down along valve body (1) inner chamber thus control the opening and closing by chamber (3), it is characterized in that: valve body (1) be provided with trim ring (6) by chamber (3) both sides, trim ring (6) inner side is provided with pedestal (7), spring (9) is provided with between pedestal (7) and trim ring (6), pedestal (7) compresses by spring (9), pedestal (7) is provided with the valve seat groove of T-shaped towards knife plate (2) side, connects the valve seat (8) of T-shaped in valve seat groove, is compressed by spring (7), and valve seat (8) inner side can close contact knife plate (2).
2. there is the two way sealed knife gate valve of selfsealings and elastic compensating valve seat as claimed in claim 1, it is characterized in that: between described trim ring (6) and pedestal (7), be provided with the first seal ring (11), between pedestal (7) and valve body (1), be provided with the second seal ring (12).
3. there is the two way sealed knife gate valve of selfsealings and elastic compensating valve seat as claimed in claim 2, it is characterized in that: the sealed diameter of described first seal ring (11) is greater than the sealed diameter of valve seat (8).
4. there is the two way sealed knife gate valve of selfsealings and elastic compensating valve seat as claimed in claim 1, it is characterized in that: between described trim ring (6) and valve body (1), be provided with side pad (13).
5. there is the two way sealed knife gate valve of selfsealings and elastic compensating valve seat as claimed in claim 1, it is characterized in that: described valve body (1) bottom welding three semi-cylindrical pads (10), three pads (10) are circumferentially uniformly distributed in direction.
6. there is the two way sealed knife gate valve of selfsealings and elastic compensating valve seat as claimed in claim 1, it is characterized in that: described valve body (1) inner chamber top is provided with stuffing box, be provided with stuffing box packing (4) in stuffing box, stuffing box packing (4) upper end is compressed by the Gland (5) being connected to valve body (1) upper end.
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 true CN104676031A (en) | 2015-06-03 |
| CN104676031B CN104676031B (en) | 2017-06-06 |
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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) |
Cited By (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 |
Cited By (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 |
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| Publication number | Publication date |
|---|---|
| CN104676031B (en) | 2017-06-06 |
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