CN201526680U - Pneumatic high temperature resistant bellows stop valve - Google Patents

Abstract

The utility model discloses a pneumatic high temperature resistant bellows stop valve, and relates to a stop valve which comprises a valve body, wherein a titanizing austenitic stainless steel bellows device is movably and mechanically connected between the lower part of a valve rod and the upper part of a valve clack; the upper part of the valve rod is matched in a pneumatic head core shaft sleeve for mechanical connection; the lower part of the valve rod is movably and mechanically connected with the valve clack; the pneumatic head core shaft sleeve is matched in a pneumatic head core shaft and mechanically connected by a pneumatic head device; one pivot of the pneumatic head core shaft leads a valve rod lifting rod to drive the titanizing austenitic stainless steel bellows device to go up and down through the pneumatic head core shaft sleeve; the inner hole at the upper side of the valve clack is matched with the pneumatic head core shaft sleeve for mechanical connection; and the pneumatic head core shaft sleeve is internally provided with the pneumatic head core shaft and mechanically connected by a pneumatic head core shaft sleeve traverse pin. The dual sturdy and durable bellows has convenient dismounting and reliable seal, and is applicable to pipelines of various conditions such as oil, fertilizer and the like.

Description

A kind of pneumatic high-temperature resisting bellow cut-off valve

Technical field:

The utility model relates to a kind of pneumatic 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, and lifting rotation rod-type is also arranged.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.When stop valve was opened, the Lift of flap 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 stop valve should be decided by the stroke of flap.

The model utility content:

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 utility model provides a kind of pneumatic high-temperature resisting bellow cut-off valve.

Technological scheme: a kind of pneumatic high-temperature resisting bellow cut-off valve, comprise valve body, it is characterized in that built-up welding Co base cemented carbide seal ring on the valve body, the active mechanical connection of titanizing Austenitic Stainless Steel bellows arrangement is below the valve rod and between above the flap, 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 pneumatic the core sleeve, the active mechanical connection of square toes and flap under the valve rod, pneumatic core sleeve fits in pneumatic the mandrel by pneumatic head unit mechanical connection, pneumatic mandrel one changes through pneumatic core sleeve makes the valve rod lifting bar drive the lifting of titanizing Austenitic Stainless Steel bellows arrangement, the moving core sleeve's mechanical connection of valve gap top endoporus distribution, the moving mandrel of interior distribution is by pneumatic core sleeve's lateral pin mechanical connection in pneumatic the core sleeve.

Technique effect: owing to adopt such scheme, simple in structure, easy for installation, flange connects convenient disassembly, dual robust bellows 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 utility model embodiment's a schematic representation.

Embodiment:

Below in conjunction with drawings and Examples the utility model is further specified.

In the drawings: 1. valve body, 2. built-up welding Co base cemented carbide seal ring, 3. titanizing Austenitic Stainless Steel bellows arrangement, 4. valve rod, 5. high temperature resistant pad, 6. bolt, 7. compression spring, 8. nut, 9. jack screw, 10. very heavy nut, 11. valve gap, 12 pneumatic core sleeves, 13. pneumatic mandrels, 14. pneumatic core sleeve's lateral pin, 15. pneumatic head units, 16. Glands, 17. filler, 18. times Packing seats, 19. flaps.

In the example shown in the figure: built-up welding Co base cemented carbide seal ring 2 on the valve body 1, sealing surface weld deposit Co base cemented carbide, wear-resisting, corrosion resistant, the friction resistant performance is good, long service life, titanizing Austenitic Stainless Steel bellows arrangement 3 active mechanical connections are below the valve rod 4 and between above the flap 19, bellows titanizing Austenitic Stainless Steel is wear-resisting, corrosion resistant, the friction resistant performance is good, long service life, 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 Pneumatic Transmission core sleeve 12,4 times square toes of valve rod and flap 19 active mechanical connections, pneumatic core sleeve 12 fits in pneumatic the mandrel 13 and consolidates it by pneumatic head unit 15, pneumatic mandrel 13 1 changes through pneumatic core sleeve 12 makes valve rod 4 lifting bars drive 2 liftings of titanizing Austenitic Stainless Steel bellows arrangement, forced seal face does not leak, a core sleeve 12 is moved in valve gap 11 top endoporus distributions, the moving mandrel 13 of distribution is consolidated it by pneumatic core sleeve's lateral pin 14 in pneumatic the core sleeve 12, rotates on valve gap 11.Flange connects convenient disassembly, dual robust bellows convenient disassembly, and product structure is reasonable, sealing is reliable, and dual robust sylphon seal design guarantees the zero leakage of valve rod.

Claims (2)

1. pneumatic high-temperature resisting bellow cut-off valve, comprise valve body, it is characterized in that built-up welding Co base cemented carbide seal ring on the valve body, the active mechanical connection of titanizing Austenitic Stainless Steel bellows arrangement is below the valve rod and between above the flap, 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.

2. a kind of pneumatic 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 pneumatic the core sleeve, the active mechanical connection of square toes and flap under the valve rod, pneumatic core sleeve fits in pneumatic the mandrel by pneumatic head unit mechanical connection, pneumatic mandrel one changes through pneumatic core sleeve makes the valve rod lifting bar drive the lifting of titanizing Austenitic Stainless Steel bellows arrangement, the moving core sleeve's mechanical connection of valve gap top endoporus distribution, the moving mandrel of interior distribution is by pneumatic core sleeve's lateral pin mechanical connection in pneumatic the core sleeve.

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