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Globe valve for welding connected type high-temperature resistant bellows

A bellows globe valve and welding connection technology are applied in the field of globe valves to achieve the effects of simple structure, improved safety of factory equipment and reasonable product structure.

Inactive Publication Date: 2009-12-23
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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  • Globe valve for welding connected type high-temperature resistant bellows

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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. Welded 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 stem nut, 13. hand wheel, 14 stem nut fastening nut, 15 key, 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 on the welded connection valve body 1, and Co-based hard alloy is surfacing on the sealing surface, which has good wear resistance, corrosion resistance, good friction resistance, long service life, and plating Titanium austenitic stainless steel double bellows device 3 is flexibly and mechanically connected under the valve stem 4. The be...

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Abstract

The invention relates to a globe valve for welding connected type high-temperature resistant bellows, in particular to a globe valve. A Co-based hard alloy seal ring is arranged on a welding connected type valve body in a mode of surface welding; an adjustable mechanism of titanizing austenitic stainless steel dual bellows is connected below a valve stem; and a handwheel rotates and passes through a valve stem nut so that the titanizing austenitic stainless steel dual bellows are driven to lift by a lifting rod of the valve stem. The globe valve has the advantages of convenient disassembly for the dual sturdy and durable bellows, reasonable product structure, sealing, reliability and no fluid loss, ensures zero leakage of the valve stem, reduces energy loss and improves the safety of plant equipment. A Co-based hard alloy is arranged on a sealing surface in a mode of the surface welding; and titanizing austenitic stainless steel for the bellows has the advantages of good properties of abrasion resistance, corrosion resistance and friction resistance and long service life. The globe valve for the welding connected type high-temperature resistant bellows is suitable for pipelines of various operating modes in the industry of petroleum, chemical engineering, pharmacy, chemical fertilizer, electrical power, and the like to cut or connect a pipeline medium.

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): F16K41/10F16K1/34F16K27/02F16K41/02F16K31/60
Inventor 季祝华
Owner SHANGHAI HAIXING VALVE FACTORY