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Fastener connecting bellows stop valve

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

Inactive Publication Date: 2009-04-01
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 stop valve is forced to seal, when the valve is closed, pressure must be applied to the valve disc to force the sealing surface not to leak. The invention provides a ferrule connection bellows stop valve

Method used

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  • Fastener connecting bellows 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. ferrule-connected valve body, 2. surfacing 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, 19. Ferrule nut.

[0009] exist figure 1 In the example shown: the ferrule-connected valve body 1 is surfacing welding Co-based hard alloy sealing ring 2, and the sealing surface is surfacing welding Co-based hard alloy, which has good wear resistance, corrosion resistance, friction resistance and long service life. Titanium-plated austenitic stainless steel double bellows device 3 is actively mechanically connected under the va...

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Abstract

The invention discloses a clamp-connecting globe valve of a corrugated tube, relating to a globe valve. The clamp-connecting globe valve comprises a clamp-connecting valve body; Co-based cemented-carbide sealing ring is welded on the valve body in a resurfacing manner; a double corrugated tube device coated with austenitic titanium stainless steel is detachably and mechanically connected to the lower part of a valve stem; and when a hand-wheel is turned, a lifting poker of the valve stem drives the double corrugated tube device coated with austenitic titanium stainless steel to rise and fall through a valve stem nut. The strong durable double corrugated tube is convenient to detach, a clamp connection is also convenient to detach, a product is simple in structure and reliable in sealing, and zero leakage of the valve stem is guaranteed. The clamp-connecting globe valve has no fluid loss, reduces energy loss and increases safety to the plant equipment. The sealing surface is welded with Co-based cemented carbide in a surfacing manner; the corrugated tube is coated with austenitic titanium stainless steel, thereby being wear-proof and corrosion-poof and having good anti-friction performance and long service life; the clamp-connecting globe valve is applicable to engineering pipelines with clamp-connecting nut externally connecting a conduit under various engineering conditions in petroleum industry, chemistry industry, pharmacy industry, fertilizer industry, electricity industry and the like to cut off or connect the pipeline media, particularly to the engineering of a heat-conducting oil boiler pipeline.

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): F16K1/00F16K1/42F16K41/10F16K27/02
Inventor 季祝华季芳芳季艳艳
Owner SHANGHAI HAIXING VALVE FACTORY
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