CN101586695A - Internal-thread connection type high-temperature resisting bellow cut-off valve - Google Patents
Internal-thread connection type high-temperature resisting bellow cut-off valve Download PDFInfo
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- CN101586695A CN101586695A CNA2008100378429A CN200810037842A CN101586695A CN 101586695 A CN101586695 A CN 101586695A CN A2008100378429 A CNA2008100378429 A CN A2008100378429A CN 200810037842 A CN200810037842 A CN 200810037842A CN 101586695 A CN101586695 A CN 101586695A
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Abstract
The invention relates to an internal-thread connection type high-temperature resisting bellow cut-off valve which belongs to cut-off valves. The cut-off valve comprises an internal-thread connection type valve body on which a Co-based hard alloy seal ring is welded, a titanized austenitic stainless steel dual bellow device is movably and mechanically connected to the lower part of a valve rod, a handwheel is rotated to enable a lifting rod of the valve rod to drive the titanized austenitic stainless steel dual bellow device to ascend and descend by a valve rod nut, the dual bellow which is firm and durable can be disassemble conveniently, the internal-thread connection and disassembly are convenient, and the Co-based hard alloy and the bellow titanized austenitic stainless steel which are welded on a sealing face have good properties of wearing resistance, corrosion resistance, abrasion resistance and long service life. The invention is suitable for cutting or communicating pipeline mediums on pipelines of various working conditions, such as the power industry, and the like and especially suitable for being used on heat-conduction oil boiler pipeline engineering.
Description
Technical field
The present invention relates to a kind of stop valve.
Background technique:
At present, known stop valve, the open-shut device with stop valve are the flaps of plug type, and sealing surface is the plane or the conical surface, the center line moving linearly of flap longshore current body.The movement pattern of valve rod has elevating lever-type.Stop valve only is applicable to standard-sized sheet and complete shut-down, does not allow to do to regulate and throttling.Belong to forced seal formula valve,, do not leak with forced seal face so when valve closing, must exert pressure to flap.When medium enters valve by the flap below, the required resistance that overcomes of steering force is the frictional force of valve rod and filler with by the thrust that pressure produced of medium, the power that the force rate of closing valve is opened valve is big, so it is big that the diameter of valve rod is wanted, otherwise the fault of valve rod bending can take place.In recent years, after occurring from self-packing valve, the MEDIA FLOW of stop valve enters valve pocket to just changing by the flap top, and at this moment, under the pressure medium effect, the power of closing valve is little, and it is big to open the power of valve, and the diameter of valve rod can correspondingly reduce.Simultaneously, under the medium effect, the valve of this pattern is also tighter.
Summary of the invention:
In order to solve stop valve forced seal formula valve, when valve closing, must exert pressure to flap, with the technical problem that forced seal face does not leak, the invention provides a kind of internal-thread connection type high-temperature resisting bellow cut-off valve.
Technological scheme: a kind of internal-thread connection type high-temperature resisting bellow cut-off valve, comprise the internal-thread connection type valve body, it is characterized in that built-up welding Co base cemented carbide seal ring on the internal-thread connection type valve body, the active mechanical connection of the dual bellows arrangement of titanizing Austenitic Stainless Steel is below valve rod, the internal-thread connection type valve body contacts the convex-concave place and is embedded with bolt spring pad nut mechanical connection by high temperature resistant pad with valve gap, put down in the stuffing box on the valve gap Packing seat filler by Gland with the jack screw on the valve gap by very heavy nut mechanical connection, the valve rod top fits over mechanical connection in the Stem Mut, Stem Mut fits in the handwheel by the key mechanical connection, handwheel one changes through Stem Mut makes the valve rod lifting bar drive the dual bellows arrangement lifting of titanizing Austenitic Stainless Steel, valve gap top endoporus is joined the Stem Mut mechanical connection, and outer tennis partner's wheel is embedded by Stem Mut tightening nut mechanical connection by key on the Stem Mut.
Technique effect: owing to adopt such scheme, simple in structure, easy for installation, dual robust bellows convenient disassembly, interior spiral shell connects convenient disassembly, and product structure is reasonable, sealing is reliable, dual robust sylphon seal design guarantees the zero leakage of valve rod.Do not have fluid loss, reduce energy loss, improve safety of factory equipment.Sealing surface weld deposit Co base cemented carbide, wear-resisting, corrosion resistant, good, the long service life of friction resistant performance, bellows titanizing Austenitic Stainless Steel is wear-resisting, corrosion resistant, good, the long service life of friction resistant performance, modified and the surfaces nitrided processing of valve rod has good anti-corruption and friction resistant performance; The indication of valve rod lifting position, more directly perceived, be applicable on the pipeline of various operating modes such as power industry, cut off or connect the pipeline medium.On conduction oil snail boiler tube road engineering, use especially.
Description of drawings:
Fig. 1 is the schematic representation of the embodiment of the invention.
Embodiment:
The present invention is further described below in conjunction with drawings and Examples.
In the drawings: 1. internal-thread connection type valve body, 2. built-up welding Co base cemented carbide seal ring, the 3. dual bellows arrangement of titanizing Austenitic Stainless Steel, 4. valve rod, 5. high temperature resistant pad, 6. bolt, 7. compression spring, 8. nut, 9. jack screw, 10. very heavy nut, 11 valve gaps, 12 Stem Muts, 13. handwheel, 14 Stem Mut tightening nuts, 15 keys, 16. Gland, 17. fillers, 18. times Packing seats.
In example shown in Figure 1: built-up welding Co base cemented carbide seal ring 2 on the internal-thread connection type valve body 1, sealing surface weld deposit Co base cemented carbide, wear-resisting, corrosion resistant, the friction resistant performance is good, long service life, the dual bellows arrangement 3 active mechanical connections of titanizing Austenitic Stainless Steel are below valve rod 4, bellows titanizing Austenitic Stainless Steel is wear-resisting, corrosion resistant, the friction resistant performance is good, long service life, internal-thread connection type valve body 1 contacts the convex-concave place and embeds with bolt 6 compression springs 7 nuts 8 fastening by high temperature resistant pad 5 with valve gap 11, putting down Packing seat 18 in the stuffing box on the valve gap 11 is tightened up by the jack screw 9 on the Gland 16 usefulness valve gaps 11 filler 17 by very heavy nut 10 adjustment, valve rod 4 tops fit in the Stem Mut 12, Stem Mut 12 fits in the handwheel 13 consolidates it by key 15, handwheel 13 1 changes through Stem Mut 12 makes valve rod 4 lifting bars drive dual bellows arrangement 2 liftings of titanizing Austenitic Stainless Steel, forced seal face does not leak, valve gap 11 top endoporus are joined Stem Mut 12, on the Stem Mut 12 outer tennis partner take turns 13 by key 15 embed by Stem Mut tightening nut 14 solid it, on valve gap 11, rotate.
Claims (3)
1. internal-thread connection type high-temperature resisting bellow cut-off valve, comprise internal-thread connection type internal-thread connection type valve body, it is characterized in that built-up welding Co base cemented carbide seal ring on the internal-thread connection type valve body, the active mechanical connection of the dual bellows arrangement of titanizing Austenitic Stainless Steel is below valve rod.
2. a kind of internal-thread connection type high-temperature resisting bellow cut-off valve according to claim 1, it is characterized in that the internal-thread connection type valve body contacts the convex-concave place and embedded with bolt spring pad nut mechanical connection by high temperature resistant pad with valve gap, put down in the stuffing box on the valve gap Packing seat filler by Gland with the jack screw on the valve gap by very heavy nut mechanical connection.
3. a kind of internal-thread connection type high-temperature resisting bellow cut-off valve according to claim 1, it is characterized in that the valve rod top fits over mechanical connection in the Stem Mut, Stem Mut fits in the handwheel by the key mechanical connection, handwheel one changes through Stem Mut makes the valve rod lifting bar drive the dual bellows arrangement lifting of titanizing Austenitic Stainless Steel, valve gap top endoporus is joined the Stem Mut mechanical connection, and outer tennis partner's wheel is embedded by Stem Mut tightening nut mechanical connection by key on the Stem Mut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100378429A CN101586695A (en) | 2008-05-22 | 2008-05-22 | Internal-thread connection type high-temperature resisting bellow cut-off valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2008100378429A CN101586695A (en) | 2008-05-22 | 2008-05-22 | Internal-thread connection type high-temperature resisting bellow cut-off valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101586695A true CN101586695A (en) | 2009-11-25 |
Family
ID=41371067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2008100378429A Pending CN101586695A (en) | 2008-05-22 | 2008-05-22 | Internal-thread connection type high-temperature resisting bellow cut-off valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101586695A (en) |
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2008
- 2008-05-22 CN CNA2008100378429A patent/CN101586695A/en active Pending
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| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091125 |