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Pressure resistance valve for nuclear grade air passage

An air duct and pressure-resistance technology, which is applied in the direction of valve lift, valve details, valve devices, etc., can solve problems affecting normal work, valve pressure difference increase, and exceeding closing pressure, etc., to achieve flexible actions and meet the requirements of exhaust air , the effect of simple structure

Active Publication Date: 2012-02-22
SHIJIAZHUANG NO 1 VALVE FACTORY
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0002] The same kind of valve used in foreign nuclear power plants includes valve body, valve seat and blade reset mechanism, but it has no emergency protection mechanism. Large, and exceeds the closing pressure of the valve, which will cause the valve to be forced to close and affect its normal work
The valve of this structure cannot meet the requirements of the nuclear power plant for the exhaust system

Method used

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  • Pressure resistance valve for nuclear grade air passage
  • Pressure resistance valve for nuclear grade air passage
  • Pressure resistance valve for nuclear grade air passage

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Embodiment Construction

[0018] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0019] Depend on Figure 1-9 It can be seen from the illustrated embodiment that this embodiment includes a valve body 1, a valve seat, a blade and its automatic reset mechanism and an emergency protection mechanism; In the example, the number of leaves is 5). The rotating shaft 3 corresponding to each blade, the rocker arm 5, and a pair of symmetrical left and right reset sub-mechanisms, the blade 2 is fixed on its corresponding rotating shaft 3 by bolts 4, and the two ends of the rotating shaft 3 pass through bearings 22 and the bearing cover 19 are installed on the rotating shaft support 21 fixed on the valve body 1; the two ends of the rotating shaft 3 are respectively fixedly connected with one end of the corresponding rocker arm 5 through keys; the left and right reset sub-mechanisms The structure is the same, the left reset s...

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Abstract

The invention relates to a pressure resistance valve for a nuclear grade air passage, which is used in a ventilation system of a nuclear power station and comprises a valve body, a valve seat, blades, an automatic blade reset mechanism of the blades and an emergency protection mechanism, wherein the blades and the automatic blade reset mechanism of the blades comprise more than three blades in vertical arrangement, and rotating shafts, a rocker arm and a pair of symmetrical left and right reset sub mechanisms corresponding to each blade, the valve seat comprises an upper sealing valve seat, a lower sealing valve seat and a side sealing seat, the emergency protection mechanism comprises an electric device and an electric fitting rocker bar, the electric device is fixed on a steel plate welded on the valve body through screw bolts, the electric rocker bar is arranged on an output shaft of the electric device, and one end of the electric fitting rocker bar presses the upper end of a connecting rod when the electric fitting rocker bar leftwards rotates for 90 degrees. The structure is simple, the action is flexible, the emergency protection capability is realized, and the back ventilation system can be ensured not to be damaged when pipe bursting accidents occur in a cabin chamber of the nuclear power station, so the ventilation requirement of the nuclear power station is met.

Description

technical field [0001] The invention relates to a nuclear-grade air duct pressure resistance valve, which is used in the exhaust system of a nuclear power plant to ensure that the rear exhaust system will not be damaged when a pipe breakage accident occurs in a cabin of the nuclear power plant. Background technique [0002] The same kind of valve used in foreign nuclear power plants includes valve body, valve seat and blade reset mechanism, but it has no emergency protection mechanism. Large, and exceeds the closing pressure of the valve, which will cause the valve to be forced to close and affect its normal work. The valve with this structure cannot meet the requirements of the nuclear power plant for the exhaust system. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a nuclear grade air duct pressure resistance valve with emergency protection capability. [0004] In order to solve the above technical problems...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F16K1/18F16K31/04F16K1/42F16K1/46
Inventor 贾正才王庆芳严梅英张庆涛吴璟常俊平马进山李雨明
Owner SHIJIAZHUANG NO 1 VALVE FACTORY
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