Method for continuous measurement of rotational speed of main heat transfer pump in nuclear island from reverse to forward rotation

Abstract

The invention relates to a method for continuously measuring the rotating speed of a main heat transfer pump in a nuclear island from reverse rotation to forward rotation. N inductance approach switches, a rotating speed signal processing unit and a signal modulator are used in the invention. The nuclear control of large foreign companies to the nuclear power field in China and the technology and price monopoly of key products are solved. The method can be popularized in the measurement of the rotating speed of other similar pump shaft pump groups to reduce imported products and improve the localization rate of nuclear power stations.

Description

technical field [0001] The invention relates to a method for continuous on-line measurement of the rotation speed of a main heat transfer pump in a nuclear island from reverse rotation to forward rotation, and belongs to the technical field of monitoring and protection methods for the rotation speed of a rotary mechanical pump shaft. Background technique [0002] The routines for monitoring and protecting the instrumentation of shaft speed of rotating mechanical pumps are as follows: [0003] Rotating mechanical pump shafts are usually equipped with speed monitoring and protection instruments to monitor and protect the speed of the pump shaft online. The main heat transfer pump in the nuclear island is a kind of rotating mechanical pump shaft. In addition to the online monitoring and protection of the speed of the pump shaft that is necessary for the conventional pump shaft, it must also monitor and monitor the reverse rotation of the main heat transfer pump in the nuclear i...

AI Technical Summary

Problems solved by technology

[0004] 1. The current speed monitoring and protection instrument can only continuously monitor the speed of the pump shaft, convert the speed signal into an analog signal and transmit it to other systems such as DCC, but this type of instrument does not have the ability to distinguish whether the current speed signal is the forward rotation of the pump shaft signal or reverse signal

[0005] 2. At present, the reverse rotation monitoring and protection instrument can monitor whether the pump shaft is running forward or reverse, and has a switch output. It can continuously output the analog output of the forward rotation signal of the pump shaft, but it does not have the ability to continuously output the pump shaft from reverse rotation at the same time. Go to forward analog output

[0007] In the past, the speed measurement of the main heat transfer pump in the nuclear island was equipped with a special monitoring and protection instrument produced by a Canadian company. It is an instrument specially designed for the nuclear island pump shaft pump unit. It is expensive and involves nuclear power plant projects. There are nuclear-related controls The problem is that the technology and price of the product are monopolized, and there is no similar product in China to replace it

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