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Rod position indicator

An indicator and rod position technology, applied in the field of rod position indicators, can solve the problems of complex coding system and high manufacturing process requirements, and achieve the effect of simple coding system, meeting engineering application requirements and high measurement accuracy

Active Publication Date: 2013-11-20
中广核工程有限公司 +1
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

[0008] However, the coding system adopted by the above rod position indicator is complex and requires high manufacturing process

Method used

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Embodiment Construction

[0031] In order to make the purpose, technical solution and beneficial technical effects of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.

[0032] see figure 2 , is a structural schematic diagram of an embodiment of the rod position indicator of the present invention.

[0033] figure 2 The markings in are described as follows: 1-Pressure vessel top cover, 2-Drive rod, 3-Rod travel sleeve, 4-Primary coil, 5-Secondary coil (including multiple discrete coils), 61-Top compensation coil, 62 - Bottom compensating coil, 7- lifting coil, 8- moving coil, 9- fixed coil.

[0034] Among them, the driving rod 2, the rod travel sleeve 3, the lifting coil 7, the moving coil 8 and the fixed coil...

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Abstract

The present invention discloses a rod position indicator, which comprises a primary coil, a first secondary coil, a signal conversion circuit and a processor, wherein the primary coil is arranged along a rod stroke sleeve wrapping a measured control rod driving mechanism driving rod, the first secondary coil comprises n discrete coils, the discrete coils form sleeve connections on the periphery of the primary coil, and are divided into at least m sets of coils, the signal conversion circuit is provided for measuring electric quantity signals of every set of the coil in the m sets of the coils, and encoding the electric quantity signals into binary codes, and the processor calculates a stroke position of the measured control rod according to the binary codes corresponding to the m sets of the coils and the spaces of the n discrete coils. The rod position indicator can be used for measuring a stroke position of a control rod, and has characteristics of high measurement accuracy and simple structure.

Description

technical field [0001] The invention belongs to the field of nuclear reactor equipment, and more specifically, the invention relates to a rod position indicator. Background technique [0002] The Control Rod Drive Mechanism (CRDM) is a step-by-step lifting mechanism whose lower end is connected with the control rod assembly in the pressurized water reactor, and is used to lift, insert or hold the control rod assembly in the core. Appropriate position for reactive control. Each control rod assembly is operated by a separate CRDM. [0003] Since CRDM is a step-by-step lifting mechanism, the control rod assembly driven by it is an important mechanism to realize the start-up, power regulation, safety shutdown and emergency shutdown of the pressurized water reactor. Therefore, it is necessary to measure the axial position of the reactor control rod assembly in the core, thereby introducing a rod position indicator (Rod Position Indicator, RPI for short). [0004] Since the con...

Claims

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Application Information

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IPC IPC(8): G21C17/10
CPCY02E30/30
Inventor 安宝鹏孙振国李跃忠张逸飞魏乔苑郑茂溪赵毛毛刘森
Owner 中广核工程有限公司
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