Manually-operated jigger mechanism for emergency power device of pressurized water reactor nuclear power station

Abstract

The invention discloses a manually-operated jigger mechanism for an emergency power device of a pressurized water reactor nuclear power station, which comprises a manually-operated jigger switching device and a spring valve. The manually-operated jigger switching device is arranged on the emergency power device; the spring valve consists of a spring valve body and a spring valve seat and is also connected with a positioning mechanism; and the positioning mechanism is fixed to a diesel engine base and is pressed against the spring valve seat so as to prevent the spring valve seat from moving backwards relatively to the manually-operated jigger switching device. The manually-operated jigger mechanism avoids the phenomenon that the manually-operated jigger switching device make the spring valve seat move backwards in the prior art, so a distance between a pressure lever and the valve head is increased and a valve head cannot be pressed to cause a failure; and the spring valve has convenient operation and high reliability in a manual jigger switching process.

Description

technical field [0001] The invention belongs to the technical field of million-kilowatt advanced pressurized water reactor nuclear power, and relates to a manual cranking mechanism of emergency power equipment of a nuclear power plant, in particular to a manual cranking mechanism of a diesel engine of a power generation system of a nuclear power plant. Background technique [0002] The emergency power equipment of the nuclear power plant needs to be cranked to check the operation status of the equipment after shutting down or before starting up. The cranking is divided into manual cranking and automatic cranking. In order to facilitate inspection and not cause equipment damage, manual cranking must be performed first. The manual cranking mechanism is described in detail below by taking the diesel engine power generation system as an example. refer to figure 1 , is the manual cranking mechanism of the diesel engine, including a manual conversion device and a spring valve 11'...

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a manual cranking mechanism for emergency power equipment in PWR nuclear power plants, which can prevent the pressure rod of the cranking manual conversion device in the prior art from moving the spring valve seat backward, thereby making the pressure The distance between the rod and the valve head increases and the failure caused by the valve head cannot be pressed, and the spring valve is easy to operate and has high reliability during the manual conversion process of the crank

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