Pneumatic interior thread connection type high-temperature-resistant corrugated pipe stop valve

A bellows stop valve, connected technology, applied in the field of pneumatic stop valves, to achieve the effect of easy disassembly, improve the safety of factory equipment, and reduce energy loss

Inactive Publication Date: 2009-12-09
SHANGHAI HAIXING VALVE FACTORY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the technical problem that the shut-off valve is forced to seal, when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. This invention provides a pneumatic internal thread connection type high temperature resistant bellows shut-off valve

Method used

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  • Pneumatic interior thread connection type high-temperature-resistant corrugated pipe stop valve

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Embodiment Construction

[0007] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0008] In the figure: 1. Internal thread connection valve body, 2. Overlay welding Co-based hard alloy sealing ring, 3. Titanium-plated austenitic stainless steel double bellows device, 4. Valve stem, 5. High temperature resistant gasket, 6. Bolt, 7. Spring washer, 8. Nut, 9. Jack screw, 10. Jack nut, 11. Valve cover, 12. Pneumatic head mandrel sleeve, 13. Pneumatic head mandrel, 14. Pneumatic head mandrel Cover horizontal pin, 15. pneumatic head device, 16. packing gland, 17. packing, 18. lower packing pad, 19. valve disc.

[0009] exist figure 1 In the example shown: Co-based hard alloy sealing ring 2 is surfacing welded on the internal thread connection valve body 1, and Co-based hard alloy is surfacing welded on the sealing surface, which has good wear resistance, corrosion resistance, friction resistance and long service life. Titanium-plated aus...

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Abstract

The invention provides a pneumatic interior thread connection type high-temperature-resistant corrugated pipe stop valve and relates to a pneumatic stop valve. The pneumatic interior thread connection type high-temperature-resistant corrugated pipe stop valve comprises an interior thread connection type valve body, wherein a Co-based hard alloy sealing ring is resurfaced and welded on the interior thread connection type valve body. A titanizing austenitic stainless steel dual-corrugated-pipe device is movably and mechanically connected below a valve rod, a lower head of the valve rod is movably and mechanically connected with a valve clack, and a pneumatic head mandrel is rotated to enable a lifting rod of the valve rod to drive the titanizing austenitic stainless steel dual-corrugated-pipe device to lift by a pneumatic head mandrel sleeve. The dual firm and durable corrugated pipes are convenient to disassemble, the interior thread connection is convenient to disassemble, the product structure is reasonable, the sealing is reliable, and the zero leakage of the valve rod is ensured. Co-based hard alloy resurfaced and welded on a sealing face and titanizing austenitic stainless steel of the corrugated pipes have good properties of abrasion resistance, erosion resistance and friction resistance and long service life, and the pneumatic interior thread connection type high-temperature-resistant corrugated pipe stop valve is suitable for switching off or switching on pipeline media on pipelines with various working conditions in the petroleum industry, and the like.

Description

Technical field: [0001] The invention relates to a pneumatic shut-off valve. Background technique: [0002] At present, in the known stop valve, the opening and closing part of the stop valve is a plug-shaped valve disc, the sealing surface is a plane or a conical surface, and the valve disc moves linearly along the center line of the fluid. The movement type of the valve stem has a lifting rod type. The stop valve is only suitable for full opening and full closing, and adjustment and throttling are not allowed. It is a forced sealing valve, so when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. When the medium enters the valve from the bottom of the disc, the resistance that the operating force needs to overcome is the friction between the valve stem and the packing and the thrust generated by the pressure of the medium. The force to close the valve is greater than the force to open the valve, so the valve stem The dia...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K41/10F16K1/34F16K1/46F16K1/48F16K27/02F16K41/02F16K31/12
Inventor 季祝华
Owner SHANGHAI HAIXING VALVE FACTORY
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