CN101608711A - A kind of gate valve for external thread connected type high-temperature resistant bellows - Google Patents

A kind of gate valve for external thread connected type high-temperature resistant bellows Download PDF

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Publication number
CN101608711A
CN101608711A CNA2008100390613A CN200810039061A CN101608711A CN 101608711 A CN101608711 A CN 101608711A CN A2008100390613 A CNA2008100390613 A CN A2008100390613A CN 200810039061 A CN200810039061 A CN 200810039061A CN 101608711 A CN101608711 A CN 101608711A
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CN
China
Prior art keywords
valve
bellows
mechanical connection
temperature resistant
stem mut
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.)
Pending
Application number
CNA2008100390613A
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Chinese (zh)
Inventor
季祝华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Haixing Valve General Factory
Original Assignee
Shanghai Haixing Valve General Factory
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Haixing Valve General Factory filed Critical Shanghai Haixing Valve General Factory
Priority to CNA2008100390613A priority Critical patent/CN101608711A/en
Publication of CN101608711A publication Critical patent/CN101608711A/en
Pending legal-status Critical Current

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Abstract

A kind of gate valve for external thread connected type high-temperature resistant bellows relates to a kind of gate valve.Comprise the external screw joint type valve body, built-up welding Co base cemented carbide seal ring on the external screw joint type valve body, the active mechanical connection of the dual bellows arrangement of titanizing Austenitic Stainless Steel is below valve rod, handwheel one changes through Stem Mut makes the valve rod lifting bar drive the dual bellows arrangement lifting of titanizing Austenitic Stainless Steel, dual robust bellows convenient disassembly, outside thread connects convenient disassembly, and product structure is reasonable, sealing is reliable, guarantees the zero leakage of valve rod.Sealing surface weld deposit Co base cemented carbide, bellows titanizing Austenitic Stainless Steel are wear-resisting, corrosion resistant, good, the long service life of friction resistant performance, are applicable on the pipeline of various operating modes such as oil, chemical industry, power industry, cut off or connect the pipeline medium.On conduction oil snail boiler tube road engineering, use especially.

Description

A kind of gate valve for external thread connected type high-temperature resistant bellows
Technical field:
The present invention relates to a kind of gate valve.
Background technique:
At present, known gate valve, the open-shut device with gate valve are the flashboards of plug type, and sealing surface is the plane or the conical surface, the center line moving linearly of flashboard longshore current body.The movement pattern of valve rod has elevating lever-type.Gate 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 flashboard.When medium enters valve by the flashboard 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 gate valve enters valve pocket to just changing by the flashboard 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.When gate valve was opened, the Lift of flashboard was 25% of nominal diameter~30% o'clock, and it is maximum that flow has reached, and the expression valve has reached fully open position.So the fully open position of gate valve should be decided by the stroke of flashboard.
Summary of the invention:
In order to solve gate valve forced seal formula valve, when valve closing, must exert pressure to flashboard, with the technical problem that forced seal face does not leak, the invention provides a kind of gate valve for external thread connected type high-temperature resistant bellows.
Technological scheme: a kind of gate valve for external thread connected type high-temperature resistant bellows, comprise the external screw joint type valve body, it is characterized in that built-up welding Co base cemented carbide seal ring on the external screw joint type valve body, the active mechanical connection of the dual bellows arrangement of titanizing Austenitic Stainless Steel is below valve rod, the external screw joint 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, outside thread 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 oil, chemical industry, pharmacy, chemical fertilizer, 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. external screw joint 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 external screw joint 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, external screw joint 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. a gate valve for external thread connected type high-temperature resistant bellows comprises the external screw joint type valve body, it is characterized in that built-up welding Co base cemented carbide seal ring on the external screw joint type valve body.
2. according to claims 1 described a kind of gate valve for external thread connected type high-temperature resistant bellows, it is characterized in that the active mechanical connection of the dual bellows arrangement of titanizing Austenitic Stainless Steel is below valve rod.
3. according to claims 1 described a kind of gate valve for external thread connected type high-temperature resistant bellows, it is characterized in that the external screw joint 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, 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.
CNA2008100390613A 2008-06-17 2008-06-17 A kind of gate valve for external thread connected type high-temperature resistant bellows Pending CN101608711A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNA2008100390613A CN101608711A (en) 2008-06-17 2008-06-17 A kind of gate valve for external thread connected type high-temperature resistant bellows

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNA2008100390613A CN101608711A (en) 2008-06-17 2008-06-17 A kind of gate valve for external thread connected type high-temperature resistant bellows

Publications (1)

Publication Number Publication Date
CN101608711A true CN101608711A (en) 2009-12-23

Family

ID=41482571

Family Applications (1)

Application Number Title Priority Date Filing Date
CNA2008100390613A Pending CN101608711A (en) 2008-06-17 2008-06-17 A kind of gate valve for external thread connected type high-temperature resistant bellows

Country Status (1)

Country Link
CN (1) CN101608711A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107940089A (en) * 2017-09-22 2018-04-20 郑立新 Gate valve

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107940089A (en) * 2017-09-22 2018-04-20 郑立新 Gate valve

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Open date: 20091223