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Bellows guided stop check valve for nuclear power island core

A pipe-guided, bellows technology, applied in the direction of lift valves, control valves, valve devices, etc., can solve the problems of easy wear of valve sealing surfaces and high frequency of use, and achieve long service life, good sealing, and long corrosion resistance.

Active Publication Date: 2020-11-27
NANTONG GUODIAN VALVE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Bellows-guided stop check valve, one valve is multi-purpose, the frequency of use is high, the sealing surface of the valve is easy to wear, the valve seat must be detachable, and it is easy to maintain

Method used

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  • Bellows guided stop check valve for nuclear power island core

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Embodiment approach

[0025] 1. User research → determine the technical requirements and technical conditions of the project → design calculations, determine the technical parameters such as the wall thickness of the valve pressure parts → the overall design of the valve scheme → design review → select qualified suppliers according to the technical requirements and technical conditions of the design Party→Purchase raw materials required for product production→Check and accept according to standards and technical requirements→Organize production according to design drawings→Assembly→Perform various performance tests and tests on valve prototypes according to standards and technical requirements of design→Send to the authoritative department recognized by the state for inspection Inspection → After passing the inspection, the process and production departments formulate a suitable mass production process → organize mass production.

[0026] 2. Process route:

[0027] Outsourced casting blank→inspecti...

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Abstract

The invention belongs to the field of high temperature pipeline equipment and discloses a bellow guide type stop check valve for a nuclear power island. The bellow guide type stop check valve for thenuclear power island is characterized in that the bellow guide type stop check valve comprises a valve body, a valve seat, a valve cover, a valve disc, a valve disc cover, a valve stem, a middle headgasket, filler, a filler pad, a press plate, a pressure sleeve, a gear head, a guide plate, bellows, valve disc guide ring, a screw plug and an opening and closing position indicator; both ends of thevalve body are an inlet and outlet of the valve body; the valve body is provided with a low groove cavity and a high groove cavity; the inlet of the valve body is a low groove side, while the outletof the valve body is a high groove side; the valve seat is disposed between the low groove cavity and the high groove cavity; the valve disc cover is disposed on the valve cover, and the guide plate is arranged under the valve cover; the valve disc cover is connected with the bellows; the valve stem located in the cavities of the valve disc cover and the bellows moves up and down along the cavities; the bellows are elastic tubes and raise the valve disc through the valve disc cover.

Description

technical field [0001] The invention relates to a bellows-guided cut-off check valve for a nuclear power island core in the field of high-temperature pipeline equipment. Background technique [0002] The function of the traditional globe valve is to cut off or connect the medium in the pipeline; the function of the check valve is to control the backflow of the medium. At present, the cut-off and check valves used in China have the disadvantages of high manufacturing requirements, easy leakage, and short service life. The bellows-guided stop check valve has a reasonable sealing structure and corrosion resistance, long service life, less maintenance times, and reduced operating costs. Robust and durable bellows seal design ensures zero leakage of the valve stem and provides maintenance-free conditions. The opening and closing torque of the valve is small, reducing labor intensity. The outer seal of the valve adopts bellows seal and graphite, stainless steel gasket seal, the...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16K1/02F16K1/36F16K1/42F16K15/06F16K41/10
CPCF16K1/02F16K1/36F16K1/42F16K15/06F16K41/10
Inventor 徐永明胡永祥倪剑韩健莉张益龙徐赟
Owner NANTONG GUODIAN VALVE TECH CO LTD
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