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Method for continuously measuring rotating speed of main heat transfer pump in nuclear island from reverse rotation to forward rotation

A transfer pump, forward rotation technology, applied in the fields of nuclear reactor monitoring, reactors, nuclear engineering, etc., can solve the problems of high price, no analog output, no ability to distinguish between forward rotation signals and reverse rotation signals, etc., to reduce imported products, The effect of increasing the localization rate

Active Publication Date: 2015-04-22
SHANGHAI POWER EQUIP RES INST +1
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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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  • Method for continuously measuring rotating speed of main heat transfer pump in nuclear island from reverse rotation to forward rotation
  • Method for continuously measuring rotating speed of main heat transfer pump in nuclear island from reverse rotation to forward rotation
  • Method for continuously measuring rotating speed of main heat transfer pump in nuclear island from reverse rotation to forward rotation

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Embodiment Construction

[0021] In order to make the present invention more obvious and comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings.

[0022] The method provided by the present invention uses a rotational speed conversion regulator, which includes two inductive proximity switches, a rotational speed signal processing unit and a signal modulator.

[0023] like figure 1 As shown, the inductive proximity switch consists of three parts: oscillator, switch circuit and amplifier output circuit. The oscillator generates an alternating magnetic field, and when it reaches the sensing distance, an eddy current is generated in the gear disc under test, which causes the oscillation to decay and even stop the vibration. The changes of oscillator oscillation and vibration stop are processed by the post-amplifier circuit and converted into switching signals and input to the rotational speed signal processing unit, so as to achieve the purpose of no...

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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 online measurement of the rotational speed of a main heat transfer pump in a nuclear island from reverse rotation to forward rotation, and belongs to the technical field of rotational speed monitoring and protection methods for rotating mechanical pump shafts. Background technique [0002] The routines for monitoring and protecting instruments for rotating machinery pump shaft speed are as follows: [0003] Rotating mechanical pump shafts are usually equipped with speed monitoring and protection instruments to monitor and protect the speed of pump shafts online. The main heat transfer pump in the nuclear island is a type of rotating mechanical pump shaft. In addition to the on-line monitoring and protection of the speed of the pump shaft necessary for the conventional pump shaft, it must also monitor and monitor the reversal of the main heat transfer pump in the nuclear island. Protection, because the o...

Claims

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Application Information

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IPC IPC(8): G21C17/00
CPCG21C17/00G21C17/10G21C17/12Y02E30/30
Inventor 程卫国吴炜新陆文华苏国权刘玉杰岳春生钱安家陈海兵罗良盖石磊
Owner SHANGHAI POWER EQUIP RES INST
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