CN2207490Y - Dual-purpose stop valve for chlorine alkali and steam - Google Patents
Dual-purpose stop valve for chlorine alkali and steam Download PDFInfo
- Publication number
- CN2207490Y CN2207490Y CN 94231741 CN94231741U CN2207490Y CN 2207490 Y CN2207490 Y CN 2207490Y CN 94231741 CN94231741 CN 94231741 CN 94231741 U CN94231741 U CN 94231741U CN 2207490 Y CN2207490 Y CN 2207490Y
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- Prior art keywords
- valve
- seal
- steam
- sealing element
- sealing
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- 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 stop valve for chlorine alkali and steam universally used for chlorine alkali pipelines as well as boiler steam pipelines. Because the sealing surfaces of an upper sealing element and a lower sealing element adopt the structure of plane seal, elastic seal material with corrosion resistance and high temperature resistance is pressed and sintered in the heterogeneous slot of the upper sealing element, an alloy layer with corrosion resistance and high temperature resistance is sprayed and welded on the sealing surface of the lower sealing element, and the elastic seal material with high temperature resistance is pressed and sintered in the heterogeneous slot of an inverted sealing element. A guide structure is composed of the upper sealing element and a guide sleeve which is cast with a valve cap into integration. The favorable concentricity of the upper sealing element and the lower sealing element and strict seal can be ensured, and the utility model has the advantages of corrosion resistance, high temperature resistance, safe use and long service life.
Description
The utility model is a kind ofly to be used on the Production in Chemical Plant chlor-alkali pipeline or control media flows on the steam line a kind of chlor-alkali, steam two-purpose 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 frequent.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 generation accident.
The purpose of this utility model provides a kind of novel seal structure that has, good seal performance, and corrosion resistant is high temperature resistant, safe and reliable chlor-alkali steam two-purpose stop valve.
Technical characteristics of the present utility model is: chlor-alkali, steam two-purpose stop valve comprise valve gap assembly, valve body, lower seal, middle flange gasket, handwheel, it is characterized in that: be provided with guide pin bushing below valve gap, guide pin bushing and valve gap guide structure cast in block; The sealing surface of upper and lower Sealing adopts plane sealing structure.
The sealing surface surfacing of lower seal has corrosion resistant high-temperature alloy material layer; Last Sealing is provided with special-shaped groove, is suppressed with the resistant to elevated temperatures elaxtic seal of corrosion resistant in the groove, and is sintered to one with last Sealing.
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 valve on the pipeline, when electronic, surging opens and closes or artificial board when starting to take turns 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 compacting sintering has corrosion resistant in the special-shaped groove of the last Sealing anti-≤ elaxtic seal of 425 ℃ of high temperature, when valve rod descends, the sealing plane of last Sealing is close to the lower seal plane, at this moment, sealed elastomer material production resiliently deformable in the last Sealing abnormity groove, upper and lower sealing surface firmly is adjacent to, and sealing is tight.After going up Sealing on the valve rod and fully opening, 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, guarantees the concentricity of upper and lower sealing surface; Compacting sintering has the high temperature resistant elaxtic seal material of corrosion resistant in the special-shaped groove of last Sealing, and its sealing effect is better than common stop valve; Because the sealing surface surfacing of lower seal has the anticorrosion alloy material layer, makes the corrosion resistant performance of valve good.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 elastic 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 chemical industry life cycle requirement of operation continuously.Its every index all reaches the regulation of the countries concerned's standard.
Below in conjunction with accompanying drawing, the utility model embodiment is described:
Fig. 1 is chlor-alkali, steam two-purpose valve arrangement schematic representation.
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 is housed, in the bottom of valve gap back seal spare 5 is housed, on back seal spare, be processed with special-shaped groove, compacting sintering has the resistant to elevated temperatures elaxtic seal of corrosion resistant in groove, and is sintered to one with base material.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 7 after passing filler chamber, overlaps upper press cover 8 again, valve rod 9 is twisted mutually with Stem Mut 10 again.Sealing 3 on stem bottom is equipped with, and are processed with special-shaped groove on last Sealing, and compacting sintering has the high temperature resistant elaxtic seal of corrosion resistant in groove, and are one with the base material burning.
Be provided with the space in last Sealing, the open loop of being rivals in a contest in it to control the swing degree of Sealing, reaches upper and lower Sealing good concentricity.Thereby constitute the valve gap assembly.Cleaning valve body dregs are equipped with lower seal 2 in valve body 1, surfacing has corrosion resistant high-temperature alloy material layer on the sealing plane of lower seal.Flange seal pad 4 during the sealing concave surface of flange is placed in valve body top connects with valve body the valve gap assembly with bolton.At the valve rod top 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.The sealing surface of upper and lower Sealing and back seal spare adopts ferrous alloy, nickel-base alloy, Austenitic Stainless Steel surfacing or built-up welding.
Claims (4)
1, a kind of chlor-alkali, steam two-purpose 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 guide pin bushing, guide pin bushing and valve gap are cast or are welded into one, constitute guide structure, the sealing surface of upper and lower Sealing is made as plane sealing structure.
2, chlor-alkali according to claim 1, steam two-purpose valve, it is characterized in that: go up Sealing and be provided with special-shaped groove, compacting sintering has the high temperature resistant elaxtic seal of corrosion resistant in the groove, and is one with the base material burning, and the sealing surface surfacing of lower seal has corrosion resistant high-temperature alloy layer.
3, chlor-alkali according to claim 1, steam two valves is characterized in that: back seal spare is housed below valve gap, which is provided with special-shaped groove, compacting sintering has high temperature resistant elaxtic seal of corrosion resistant and base material to be sintered to one in special-shaped groove.
4, chlor-alkali according to claim 3, steam two-purpose valve 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 the resistant to elevated temperatures hard alloy layer of corrosion resistant on the conical seal (contact) face of boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231741 CN2207490Y (en) | 1994-12-26 | 1994-12-26 | Dual-purpose stop valve for chlorine alkali and steam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231741 CN2207490Y (en) | 1994-12-26 | 1994-12-26 | Dual-purpose stop valve for chlorine alkali and steam |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2207490Y true CN2207490Y (en) | 1995-09-13 |
Family
ID=33843509
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94231741 Expired - Fee Related CN2207490Y (en) | 1994-12-26 | 1994-12-26 | Dual-purpose stop valve for chlorine alkali and steam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2207490Y (en) |
-
1994
- 1994-12-26 CN CN 94231741 patent/CN2207490Y/en not_active Expired - Fee Related
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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 |