CN201475485U - Special knife gate valve for power - Google Patents
Special knife gate valve for power Download PDFInfo
- Publication number
- CN201475485U CN201475485U CN2009201903749U CN200920190374U CN201475485U CN 201475485 U CN201475485 U CN 201475485U CN 2009201903749 U CN2009201903749 U CN 2009201903749U CN 200920190374 U CN200920190374 U CN 200920190374U CN 201475485 U CN201475485 U CN 201475485U
- Authority
- CN
- China
- Prior art keywords
- valve body
- sealing
- valve
- sealing cover
- flashboard
- 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.)
- Expired - Fee Related
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- Sliding Valves (AREA)
Abstract
The utility model relates to a special knife gate valve for powder, which comprises a valve body, a gate plate, a valve rod, a transmission mechanism, a bracket, a sealing piece and an installation part, wherein one side surface of the gate plate is in contact with the sealing surface of the valve body, the lower part of the other side surface takes the shape of an inclined plane, the inclined plane is in contact with a compacting wedge block at the lower part of a through hole when the gate plate is closed, and the upper part of the valve body is sealed by filling materials. The utility model is mainly characterized in that a sealing cover is arranged between the valve body and the bracket, a sealed cavity is formed between the sealing cover and the filling material, and a blowing hole is formed on the sealing cover so as to prevent powder from leaking from the filling material part. The utility model has the advantages of good sealing performance, environmental protection and the like, and is suitable for switch equipment on PTA production lines.
Description
Technical field
The utility model relates to a kind of valve, particularly about a kind of knife-shape gate valve.
Background technique
Knife-shape gate valve comprises valve body, flashboard, valve rod, driving mechanism, support, Sealing and assembling set.As publication number is the knife-shape gate valve of CN2384057, a side of its flashboard contacts with valve body sealing surface, the bottom of another side is angular surface type, this inclined-plane contacts with the voussoir that compresses that is positioned at the through hole bottom, close the foul that can strike off sealing surface in the closed procedure automatically at gate valve, reduce the wearing and tearing to sealing surface, packing seal is adopted on valve body top, is widely used on the PTA production line.Its shortcoming is: flashboard is produced wearing and tearing to stuffing box packing in the using process, causes the filler position to leak, and causes the environment dust pollution.
Summary of the invention
The purpose of this utility model is the shortcoming that exists at prior art, provides a kind of and prevents that powder from leaking outside, the special-purpose knife-shape gate valve of the powder of good airproof performance.
The technical solution of the utility model comprises valve body, flashboard, valve rod, driving mechanism, support, Sealing and assembling set, a side of flashboard contacts with valve body sealing surface, the bottom of another side is angular surface type, this inclined-plane contacts with the voussoir that compresses that is positioned at the through hole bottom when flashboard cuts out, packing seal is adopted on valve body top, mainly be to be provided with sealing cover between valve body and support, constitute Seal cage between sealing lid and the filler, sealing cover is provided with purge hole.
In above technological scheme, sealing cover is provided with inflation inlet.
The utility model beneficial effect compared with prior art is to be provided with sealing cover between valve body and support, prevents that powder from leaking outside from filler portion, has advantages such as good seal, environmental protection.
Description of drawings
Fig. 1 is a structure sectional view of the present utility model.
Embodiment
The special-purpose knife-shape gate valve of powder as shown in Figure 1 comprises valve body 2, flashboard 4, valve rod 11, driving mechanism 18, support 16, Sealing and assembling set.Fixedlyed connected with flashboard 4 by lower bearing pin 8 in the lower end of valve rod 11, the upper end is connected with rotatingshaft 17 by upper pin 15.A side of flashboard 4 contacts with valve body 2 sealing surfaces, the bottom of another side is angular surface type, this inclined-plane contacts with the voussoir 3 that compresses that is positioned at the through hole bottom when flashboard 4 cuts out, valve body 2 passage upsides in flashboard 4 inclined-planes one side are provided with jacking block 5, this jacking block 5 holds out against flashboard 4, make flashboard 4 be close to valve body 2 sealing surfaces, increase the sealing force between flashboard 4 and valve body 2 sealing surfaces.By filler 6 sealings, this filler 6 is fitted between valve body 2 and the flashboard 4 by Gland 7, screw 20 between valve body 2 tops and the flashboard 4.Be provided with sealing cover 19 between valve body 2 and support 16, formation Seal cage 21 between sealing lid 19 and the filler 6 prevents from that dust from leaking outside to cause environmental pollution.Sealing cover 19 is provided with purge hole 10, and this purge hole 10 is by cover plate 9 sealing, opens cover plate 9 and can clean dust in the Seal cage 21.Be provided with stuffing box packing 13 between sealing cover 19 and the support 16, sealing filler 13 is fitted between valve rod 11 and the sealing cover 19 by gland 14.Sealing cover 19 is provided with inflation inlet 12, and this inflation inlet 12 is communicated with Seal cage 21, charges into nitrogen by inflation inlet 12 to Seal cage 21, and its pressure prevents that greater than pipeline medium pressure the medium dust from leaking into Seal cage 21 from filler 6.Be provided with purge hole 1 down in valve body 2 bottoms, prevent that powder is in the gathering of valve pocket bottom.
Claims (2)
1. the special-purpose knife-shape gate valve of a powder, valve body (2), flashboard (4), valve rod (11), driving mechanism (18), support (16), Sealing and assembling set, a side of flashboard (4) contacts with valve body (2) sealing surface, the bottom of another side is angular surface type, this inclined-plane contacts with the voussoir (3) that compresses that is positioned at the through hole bottom when closing at flashboard (4), filler (6) sealing is adopted on valve body (2) top, it is characterized in that between valve body (2) and support (16), being provided with sealing cover (19), constitute Seal cage (21) between sealing lid (19) and the filler (6), sealing cover (19) is provided with purge hole (12).
2. the special-purpose knife-shape gate valve of powder according to claim 1 is characterized in that sealing cover (19) is provided with inflation inlet (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201903749U CN201475485U (en) | 2009-08-03 | 2009-08-03 | Special knife gate valve for power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201903749U CN201475485U (en) | 2009-08-03 | 2009-08-03 | Special knife gate valve for power |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201475485U true CN201475485U (en) | 2010-05-19 |
Family
ID=42411735
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201903749U Expired - Fee Related CN201475485U (en) | 2009-08-03 | 2009-08-03 | Special knife gate valve for power |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201475485U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI836912B (en) * | 2022-12-15 | 2024-03-21 | 大陸商西安奕斯偉材料科技股份有限公司 | throttle valve |
-
2009
- 2009-08-03 CN CN2009201903749U patent/CN201475485U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI836912B (en) * | 2022-12-15 | 2024-03-21 | 大陸商西安奕斯偉材料科技股份有限公司 | throttle valve |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20100519 Termination date: 20170803 |