Nuclear power station main pump rotating speed measurement system and method

A rotational speed measurement, nuclear power plant technology, applied in linear/angular velocity measurement, velocity/acceleration/shock measurement, measurement device, etc., can solve the problems of small output signal amplitude, low reliability, narrow rotational speed measurement range, etc. Current loop interference, the effect of improving anti-interference ability and improving anti-interference ability

Inactive Publication Date: 2018-06-01
中广核工程有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The output signal amplitude of this kind of sensor is small, especially at low speed, it is easily overwhelmed by environmental noise, the speed measurement range is narrow, and the installation and debugging of this kind of sensor is difficult, and the target pin and the sensor are easy to collide and damage the target pin, resulting in common cause failure , the redundant channel cannot output the speed signal
In addition, the cables used in the system are coaxial cables, which have limited anti-interference ability and low reliability

Method used

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  • Nuclear power station main pump rotating speed measurement system and method
  • Nuclear power station main pump rotating speed measurement system and method
  • Nuclear power station main pump rotating speed measurement system and method

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Experimental program
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Embodiment 1

[0048] Such as figure 1 As shown, this embodiment provides a nuclear power plant main pump rotation speed measurement system, including:

[0049] The target 1 is set on the main pump and used to follow the rotation of the main pump;

[0050] The sensor assembly 2 is fixedly arranged on the support of the rotation plane of the target 1, and makes the target 1 have a gap with the sensor assembly 2 when it rotates and the projection does not intersect. The sensor assembly 2 is used for each generating a pulse signal when the target 1 meets; and,

[0051] The rotational speed signal processing module 3 is connected to the sensor assembly 2 through a triaxial cable, and is used to process the pulse signal and obtain the rotational speed of the main pump.

[0052] It should be noted that the target and the sensor assembly are arranged in the containment, and the sensor assembly is radially fixed on the rotation plane of the target. When the target rotates to the sensor assembly, the...

Embodiment 2

[0090] The present invention also provides a method for measuring the rotational speed of the main pump of the nuclear power plant, which can be applied to the rotational speed measurement system of the main pump of the nuclear power plant in the first embodiment.

[0091] see Figure 5 , is a schematic flow chart of an embodiment of a method for measuring the rotational speed of a main pump of a nuclear power plant provided by the present invention, the method comprising:

[0092] S1. The target follows the rotation of the main pump;

[0093] S2. The sensor assembly generates a pulse signal every time it meets the target; the sensor assembly is fixedly arranged on the support of the rotation plane of the target, and the target has a gap with the sensor assembly when rotating and projection without intersection;

[0094] S3. The rotational speed signal processing module processes the pulse signal to obtain the rotational speed of the main pump; the rotational speed signal pr...

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Abstract

A nuclear power station main pump rotating speed measurement system disclosed by the present invention comprises a target arranged on a main pump and used for following the main pump to rotate; a sensor assembly fixedly arranged on a support in a rotation plane of the target, enabling the target to have a gap with the sensor assembly when the target rotates and enabling the projection not to havethe intersection and used for generating a pulse signal when meeting the target every time; and a rotating speed signal processing module connected with the sensor assembly via three coaxial cables and used for processing the pulse signals and obtaining the rotating speed of the main pump. The present invention also discloses a nuclear power station main pump rotating speed measurement method. According to the present invention, the rotating speed of the main pump can be measured accurately and reliably under a harsh electromagnetic interference environment of a nuclear power station and on the long-distance transmission condition.

Description

technical field [0001] The invention relates to the technical field of nuclear power plants, in particular to a system and method for measuring the rotational speed of a main pump of a nuclear power plant. Background technique [0002] The system for measuring the speed of the main pump mainly includes sensors, cables and signal processing modules. In nuclear power plants, the reactor coolant pump is the key equipment to ensure the normal operation of the nuclear power plant. The speed is an important parameter to monitor the operation status of the main pump. The main pump speed signal is one of the reactor coolant flow protection signals. It is essential for the normal operation of nuclear power plants. Most of the main pump speed measurement adopts the principle of magnetoelectricity, and the signal amplitude is proportional to the speed. At low speed, weak signals are easily overwhelmed by environmental noise, and long-distance transmission is also easy to introduce int...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01P3/486
CPCG01P3/486
Inventor 张岚夏祖国樊树斌张华李宏敬仁春齐盼进
Owner 中广核工程有限公司
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