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Buckling connection type high-corrosion resisting bellow cut-off valve

A bellows globe valve and connection type technology, applied in the field of globe valves, can solve the problems that common materials cannot withstand high corrosion and affect the service life, and achieve the effects of improving the safety of factory equipment, reducing energy loss and facilitating disassembly.

Inactive Publication Date: 2009-11-25
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 of the stop valve forced sealing type valve, when the valve is closed, pressure must be applied to the disc to force the sealing surface not to leak. Ordinary materials are not resistant to high corrosion, which affects the technical problem of service life.

Method used

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  • Buckling connection type high-corrosion resisting bellow cut-off 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 picture: 1. Snap-fit ​​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 welded on the snap-fit ​​connection 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 mechanically connected under the valve stem 4. The bellows...

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Abstract

The invention relates to a buckling connection type high-corrosion resisting bellow cut-off valve which belongs to cut-off valves. The buckling connection type high-corrosion resisting bellow cut-off valve comprises a buckling connecting type valve body on which a Co-based hard alloy seal ring is welded, a titanized austenitic stainless steel bellow device is movably connected to the lower part of a valve rod, a handwheel is rotated to enable a lifting rod of the valve rod to drive the titanized austenitic stainless steel dual bellow device to ascend and descend by a valve rod nut, the dual bellow which is firm and durable is assembled conveniently, the buckling connection and disassembly are convenient, and the product has reasonable structure and reliable sealing; and the Co-based hard alloy and the bellow titanized austenitic stainless steel which are welded on a sealing face have good properties of wearing resistance, corrosion resistance, abrasion resistance and long service life. The invention is suitable for cutting or communicating mediums on pipelines of various working conditions, such as petroleum and chemical industries, and the like.

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): F16K41/10F16K1/34F16K1/48F16K1/46F16K27/02F16K41/02F16K31/60
Inventor 季祝华
Owner SHANGHAI HAIXING VALVE FACTORY
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