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External thread connecting type high-temperature resistant corrugated pipe stop valve

A bellows globe valve and connection type technology, applied in the field of globe valves, to achieve the effects of reasonable product structure, convenient disassembly, good corrosion resistance and anti-friction performance

Inactive Publication Date: 2009-11-04
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.

Method used

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  • External thread connecting 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. External thread connection type external 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. Resistance High temperature gasket, 6. Bolt, 7. Spring washer, 8. Nut, 9. Jack screw, 10. Jack nut, 11 valve cover, 12 valve stem nut, 13. hand wheel, 14 valve stem nut tightening nut, 15 keys, 16. packing gland, 17. packing, 18. lower packing pad.

[0009] exist figure 1 In the example shown: Co-based hard alloy sealing ring 2 is surfacing welded on the external threaded valve body 1, and Co-based hard alloy is surfacing welded on the sealing surface, which is wear-resistant, corrosion-resistant, anti-friction, and has a long service life. Titanium-plated austenitic stainless steel double bellows device 3 is actively m...

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PUM

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Abstract

The invention discloses an external thread connecting type high-temperature resistant corrugated pipe stop valve and relates to a stop valve which comprises an external thread connecting type valve body, wherein a Co-based hard alloy seal ring is welded on the external thread connecting type valve body; a titanizing austenite stainless steel dual corrugated pipe device is loosely and mechanically connected under a valve rod; and a handwheel rotates and causes a lifting rod of the valve rod to drive the titanizing austenite stainless steel dual corrugated pipe device to lift by a valve rod nut. A dual, hard and durable corrugated pipe is convenient for disassembly, external threads are convenient for connection and disassembly, a product has reasonable structure and reliable seal, and the zero leakage of the valve rod is ensured. The external thread connecting type high-temperature resistant corrugated pipe stop valve has the advantages of Co-based hard alloy welded on the seal surface, good abrasion resistance, corrosion resistance and friction resistance of corrugated pipe titanizing austenite stainless steel and long service life, is suitable for switching off or on a pipeline medium on a pipeline under various working conditions of petroleum, chemical industry, pharmacy, fertilizer, power industry, and the like and is particularly used for conduction oil boiler pipeline engineer.

Description

Technical field: [0001] The invention relates to a cut-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 diameter of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/34F16K41/02F16K41/00F16K25/00F16K27/02F16K31/60
Inventor 季祝华
Owner SHANGHAI HAIXING VALVE FACTORY
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