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Turbine valve stroke measuring device, turbine valve stroke monitoring system and turbine valve stroke monitoring method

A technology of measuring device and monitoring system, applied in the field of steam turbine, can solve the problems such as the limitation of LVDT installation method, and achieve the effect of solving the problem of easy breakage, improving reliability and reducing the risk of tripping

Inactive Publication Date: 2017-05-24
CHINA SHENHUA ENERGY CO LTD +2
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Problems solved by technology

[0010] The purpose of the present invention is to provide a stroke measuring device, stroke monitoring system and control method for steam turbine valves, which are used to solve the problems of limitations in traditional LVDT-based steam turbine valve stroke monitoring schemes and LVDT installation methods

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  • Turbine valve stroke measuring device, turbine valve stroke monitoring system and turbine valve stroke monitoring method
  • Turbine valve stroke measuring device, turbine valve stroke monitoring system and turbine valve stroke monitoring method

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Embodiment Construction

[0042] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.

[0043] In the embodiment of the present invention, the steam turbine valve mainly refers to the high-pressure control valve (also called high-pressure control valve) of the oil motor of the steam turbine.

[0044] The embodiment of the present invention provides a stroke measuring device for a steam turbine valve, figure 2 is a structural schematic diagram of the stroke measuring device, and it is a top view. Such as figure 2 As shown, the stroke measuring device includes a valve lead-out rod 21 ( figure 2 not shown in ), the first LVDT displacement sensor 22, the second LVDT displacement sensor 23 and the third LVDT displacement sensor 24, wherein the fir...

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Abstract

The invention relates to the technical field of turbines, and specifically relates to a turbine valve stroke measuring device and a turbine valve stroke monitoring system. The turbine valve stroke measuring device comprises a first LVDT (Linear Variable Differential Transformer) displacement sensor, a second LVDT displacement sensor and a third LVDT displacement sensor, wherein the first LVDT displacement sensor, the second LVDT displacement sensor and the third LVDT displacement sensor are connected with a leading-out rod of a turbine valve, the first LVDT displacement sensor is mounted at the side of an anti-rotation rod of the turbine valve, and the second LVDT displacement sensor and the third LVDT displacement sensor are mounted on a weld at the side of a LVDT connecting rod of the turbine valve in parallel. According to the turbine valve stroke measuring device disclosed by the invention, as a triple-redundancy structure of the LVDT displacement sensors is arranged, reliability of the LVDT displacement sensors of the turbine valve is improved, the problem on easiness for fracture of a LVDT displacement sensor at an adverse environment in the spot is solved, and meanwhile an out-of-control valve caused by failure of the LVDT displacement sensor is solved.

Description

technical field [0001] The invention relates to the field of steam turbines, in particular to a stroke measuring device for a steam turbine valve, a stroke monitoring system and a method. Background technique [0002] LVDT (linear Variable Different Transformer, linear variable differential transformer) displacement sensor (hereinafter referred to as LVDT displacement sensor referred to as LVDT) using the principle of differential inductance, can convert the mechanical change of the linear motion of an object into the corresponding electrical signal, so as to automatically monitor and control the displacement (or stroke). Such as figure 1 As shown, a conventional LVDT displacement sensor usually includes a cable 11, a sleeve 12 (a coil and an iron core are included in the sleeve, figure 1 Not shown in), iron core 13 (a part of the iron core is included in the sleeve, figure 1 Not shown in, the other part extends out of the sleeve) and the nut 14. In practical application,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01B7/02F01D17/10F01D21/00
CPCG01B7/02F01D17/10F01D21/003F05D2270/706
Inventor 赵锐孙月刘英尹武昌康二红商勇志刘洋曾宪涛赵宇
Owner CHINA SHENHUA ENERGY CO LTD
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