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Large-caliber double-piston top-mounted fixing ball valve

A fixed ball valve and double-piston valve technology, applied to the valve details, valve device, valve shell structure, etc., can solve the problems of downstream pollution, waste of time and cost, and reduce the safety of downstream workers, so as to facilitate disassembly and maintenance and ensure valve Rod strength and small torque effect

Inactive Publication Date: 2018-11-30
XINUOWEI VALVE CONTROL SUZHOU CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Conventional fixed ball valves are very inconvenient to disassemble and maintain, and once the upstream seat of a single-piston fixed ball valve is damaged, the downstream will not be able to seal, which will cause pollution to the downstream and greatly reduce the safety of downstream workers, so the single-piston Once the upstream valve seat of the fixed ball valve is damaged, the entire pipeline must be shut down and the valve removed from the pipeline, which will cause a great waste of time and cost

Method used

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  • Large-caliber double-piston top-mounted fixing ball valve
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  • Large-caliber double-piston top-mounted fixing ball valve

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Embodiment Construction

[0023] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0024] Such as Figure 1 to Figure 5 As shown, it is valve body 1, valve cover 2, sphere 3, single-piston valve seat 4, single-piston valve seat sealing ring 5, double-piston valve seat 7, double-piston valve seat sealing ring 8, valve seat support according to the present invention Ring 10, valve stem 11, gland flange 12, connecting support plate 13, gear box 14, pressure spring 15, anti-static device 16, discharge device 20, grease injection device 22, thrust pad 24, metal graphite spiral wound gasket 26. Rubber O-ring 29, sliding bearing 35, fastener 38, and graphite packing 48.

[0025] Ball and seat sealing: the single-piston valve seat 4 is installed in the corresponding valve seat groove of the valve body 1, and a certain number of compression springs 15 are installed in the compression spring hole on the back, so that the single-piston valve se...

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Abstract

The invention discloses a large-caliber double-piston top-mounted fixing ball valve which comprises a valve body, a ball body, a single piston valve seat, a single piston valve seat seal ring, a double piston valve seat, a valve seat supporting ring and a rubber O-shaped ring. The single piston valve seat is installed in a corresponding valve seat groove of the valve body, and back compression spring holes are provided with a specific number of compression springs, so that the single piston valve seat is tightly attached to the ball body to form initial seal. When a pipeline has a medium pressure, a pressure difference is formed by the rubber O-shaped ring and the single piston valve seat, and a unidirectional seal single piston effect is achieved; the double piston valve seat and the valve seat supporting ring are installed in corresponding valve seat grooves of the valve body, the back compression spring holes of the valve seat are provided with the specific number of compression springs, so that the double piston valve seat is tightly attached to the ball body to form initial seal. When the pipeline has a medium pressure, a pressure difference is formed by the rubber O-shaped ring and the double piston valve seat, and sealing is ensured.

Description

technical field [0001] The invention relates to a ball valve, in particular to a large-diameter double-piston top-mounted fixed ball valve. Background technique [0002] Conventional fixed ball valves are very inconvenient to disassemble and maintain, and once the upstream seat of a single-piston fixed ball valve is damaged, the downstream will not be able to seal, which will cause pollution to the downstream and greatly reduce the safety of downstream workers, so the single-piston Once the upstream valve seat of the fixed ball valve is damaged, the entire pipeline must be shut down and the valve removed from the pipeline, which will cause a great waste of time and cost. [0003] In view of the above-mentioned defects of the prior art, it is necessary to design a large-diameter double-piston top-mounted trunnion ball valve. Contents of the invention [0004] The technical problem to be solved by the present invention is to provide a large-diameter double-piston top-mounte...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K5/06F16K5/20F16K27/06F16K27/08F16K41/04
CPCF16K5/06F16K5/0647F16K5/0689F16K5/0694F16K5/201F16K5/205F16K27/067F16K27/08
Inventor 韩泽海
Owner XINUOWEI VALVE CONTROL SUZHOU CO LTD