CN2207487Y - Complex sealing stop valve for chlorine alkali and steam - Google Patents
Complex sealing stop valve for chlorine alkali and steam Download PDFInfo
- Publication number
- CN2207487Y CN2207487Y CN 94231738 CN94231738U CN2207487Y CN 2207487 Y CN2207487 Y CN 2207487Y CN 94231738 CN94231738 CN 94231738 CN 94231738 U CN94231738 U CN 94231738U CN 2207487 Y CN2207487 Y CN 2207487Y
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- CN
- China
- Prior art keywords
- seal
- valve
- steam
- high temperature
- alkali
- 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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Abstract
The utility model relates to a double-duty double seal type stop valve for chlorine alkali and steam universally used on chlorine alkali pipelines as well as steam pipelines. Elastic seal material with corrosion resistance and high temperature resistance is pressed and sintered in the heterogeneous slot of a lower sealing element in the valve, an annular circumference-shaped sealing surface in a flat form arranged on the sealing surface of an upper sealing element is connected with a tapered sealing surface, and an elastic seal element with corrosion resistance and high temperature resistance is pressed and sintered in the heterogeneous slot of an inverted sealing element. A tapered boss is arranged on a valve rod. A guide structure is composed of a guide sleeve which is cast with a valve cover into integration and the upper sealing element. Favorable concentricity of the upper sealing element and the lower sealing element is ensured, and the utility model has the advantages of tight seal, corrosion resistance, high temperature resistance, safe use and long service life.
Description
The utility model is on a kind of pipeline that is used for the Production in Chemical Plant chlor-alkali or control media flows on the steam line a kind of chlor-alkali, steam two-purpose double seal type stop valve.
Relevant by retrieval patent documentation is not found the valve identical with the utility model structure as yet.China's chemical industry is not specialized in the chlor-alkali stop valve at present, does not more have corrosion resistant, resistant to elevated temperatures chlor-alkali, steam two-purpose valve, and the valve that is used for chlor-alkali pipeline and steam line is common stop valve.Because the sealing surface of the Sealing of common stop valve, filler be corrosion resistant not, is used for chlor-alkali pipeline rapid wear, change frequently, cause economic loss.And the sealing configuration of common stop valve routine does not reach the seal request of Chemical Manufacture, and common stop valve is not because of there being stronger resistance to high temperature, is installed on the steam line of continuous operation perishablely, causes leakage.
The purpose of this utility model provides a kind of good seal performance, corrosion resistant is high temperature resistant, safe and reliable, the life-span is long, has chlor-alkali, the steam two-purpose double seal type stop valve of double seal function.
Technical characteristics of the present utility model is: chlor-alkali, steam two-purpose double seal type stop valve comprise valve gap assembly, valve body, lower seal, middle flange gasket, handwheel, it is characterized in that: be provided with below valve gap and valve gap guide pin bushing cast in block and last Sealing formation guide structure; On lower seal, be provided with special-shaped groove, in special-shaped groove, be suppressed with the high temperature resistant elaxtic seal of corrosion resistant.All shape sealing surfaces of ring and conical seal (contact) face that the sealing surface of last Sealing is provided with plane form link.
On the valve rod that links with valve gap, be provided with the cone boss that to fit with back seal spare, surfacing hard alloy layer on the conical seal (contact) face of boss, back seal spare is housed below valve gap, which is provided with special-shaped groove, in special-shaped groove, be suppressed with the high temperature resistant elaxtic seal of the corrosion resistant that can satisfy usage requirement, and be sintered into one with base material.
Be installed in chlor-alkali, steam two-purpose double seal type stop valve on the pipeline, when electronic, surging opens and closes or during artificial opening/shutting valve, valve rod moves up and down in by valve gap and guide pin bushing guide structure cast in block, has guaranteed the concentricity of upper and lower Sealing, obtains good sealing effect.Because the die casting sintering has the high temperature resistant elaxtic seal of corrosion resistant in the special-shaped groove of lower seal, last sealing surface of sealing is provided with the plane sealing face and conical seal (contact) face links, when valve rod descends, at first go up the conical seal (contact) face of Sealing and the elaxtic seal tapering contact seal of lower seal, valve rod continues to descend, then the elaxtic seal of lower seal produces resiliently deformable, reach sealing for the first time, when valve rod drops to extreme lower position, plane sealing face on the sealing surface of last Sealing promptly with the elastic element of lower seal on the plane firmly fit, realize double seal.After valve rod rises to back seal spare and fully opens, the boss conical seal (contact) face on the valve rod promptly with valve gap on the conical seal (contact) face of back seal spare fit tightly, both guaranteed not leak, can under the valve working state, change filler again.
The utility model has the advantages that: structural design is new reasonable, owing to be provided with valve gap and guide pin bushing guide structure cast in block, has guaranteed the concentricity of upper and lower Sealing; Compacting sintering has the high temperature resistant elaxtic seal of corrosion resistant in the lower seal abnormity groove owing to be provided with, and last sealing surface of sealing is provided with taper and plane shape sealing surface, has double sealing structure, and sealing effect is better than common stop valve greatly; Valve body, valve gap, gland adopt spheroidal graphite cast iron or No. 25 Fine Steel Casting irons or 20-35 forging to cause type, and its mechanical strength is better than common stop valve; Owing to be suppressed with the high temperature resistant elaxtic seal material of corrosion resistant in the special-shaped groove of back seal spare and matrix is sintered to one, do not come off.Safe and reliable, long service life all can satisfy the usage requirement of operation continuously on chlor-alkali pipeline, the high temperature steam pipeline.Its every index all reaches the regulation of the countries concerned's standard.
Below in conjunction with description of drawings the utility model embodiment:
Fig. 1 is the structural representation of chlor-alkali, steam two-purpose double seal type stop valve.
Among the figure: 1, valve body, 2, lower seal, 3, go up Sealing, 4, middle flange gasket, 5, back seal spare, 6, valve gap, 7, filler, 8, gland, 9, valve rod, 10, Stem Mut, 11, handwheel.
Below valve gap 6, be provided with guide pin bushing, valve gap and guide pin bushing cast solid constitute guide structure, at the top of valve gap 6 Stem Mut 10 are housed, and in the bottom of valve rod back seal spare 5 are housed, on back seal spare, be processed with special-shaped groove, in groove the compacting sintering corrosion resistant anti-≤ elaxtic seal of 425 ℃ of high temperature.In valve gap filler chamber both sides, the bolt of the gland 8 of control filler is housed, be processed with cone boss on the valve rod 9, surfacing hard alloy layer on its conical seal (contact) face, valve rod 9 is inserted filler after passing filler chamber, overlaps upper press cover 8 again, valve rod 9 is twisted mutually with Stem Mut again.In valve rod 9 bottoms Sealing 3 is housed, thereby constitutes the valve gap assembly.Be processed with the plane sealing face on the outer ring of last Sealing 3 bottom surfaces, the conical seal (contact) face and the plane sealing face of processing link in the middle of the bottom surface.In last Sealing top, be provided with the space, divided ring is set in it,, reach upper and lower Sealing good concentricity to control the swing degree of Sealing.The cleaning valve body dregs, lower seal 2 is housed in valve body 1, on lower seal, be processed with special-shaped groove, in groove the compacting sintering corrosion resistant anti-≤ 425 ℃ of high temperature elaxtic seals.Flange gasket 4 during the sealing concave surface of flange is placed in the valve body middle part connects the valve gap assembly with valve body 1 usefulness bolton.At valve rod 9 tops handwheel 11 is housed.Valve body, valve gap, gland adopt spheroidal graphite cast iron or No. 25 Fine Steel Casting irons or 20-35 forging to cause type.Element is corrosion resistant in filler and the back seal spare abnormity groove anti-≤ 425 ℃ of high temperature elaxtic seals, the material of upper and lower sealing surface of sealing is ferrous alloy, nickel base alloy spray welding, the built-up welding of Ovshinsky stainless steel.
Claims (3)
1, a kind of chlor-alkali, steam two-purpose double seal type stop valve, comprise valve gap assembly, valve body, lower seal, middle flange gasket, handwheel, it is characterized in that: below valve gap, be provided with and valve gap guide pin bushing cast in block and last Sealing formation guide structure, be provided with special-shaped groove on lower seal, compacting sintering has corrosion resistant, high temperature resistant elaxtic seal in special-shaped groove; All shape sealing surfaces of ring and conical seal (contact) face that the sealing surface of last Sealing is provided with plane form link.
2, chlor-alkali according to claim 1, steam two-purpose double seal type stop valve, it is characterized in that: back seal spare is housed below valve gap, which is provided with special-shaped groove, compacting sintering has the high temperature resistant elaxtic seal of corrosion resistant in special-shaped groove.
3, chlorine according to claim 1, alkali steam two-purpose double seal type stop valve, it is characterized in that: be provided with the cone boss that can fit with back seal spare on the valve rod that links with valve gap, surfacing has corrosion resistant high temperature cemented carbide layer on the conical seal (contact) face of boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231738 CN2207487Y (en) | 1994-12-26 | 1994-12-26 | Complex sealing stop valve for chlorine alkali and steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231738 CN2207487Y (en) | 1994-12-26 | 1994-12-26 | Complex sealing stop valve for chlorine alkali and steam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2207487Y true CN2207487Y (en) | 1995-09-13 |
Family
ID=33843506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94231738 Expired - Fee Related CN2207487Y (en) | 1994-12-26 | 1994-12-26 | Complex sealing stop valve for chlorine alkali and steam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2207487Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081324A1 (en) * | 2008-12-30 | 2010-07-22 | 广东联塑科技实业有限公司 | Double seal valve structure |
-
1994
- 1994-12-26 CN CN 94231738 patent/CN2207487Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2010081324A1 (en) * | 2008-12-30 | 2010-07-22 | 广东联塑科技实业有限公司 | Double seal valve structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |