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Power station boiler rotary air preheater gap sensor

A technology of air preheater and gap sensor, which is applied in the direction of electrical components, instruments, electromechanical devices, etc., to achieve the effect of signal stability

Inactive Publication Date: 2004-10-06
上海东方机电科技公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of existing gap measurement sensors, and to provide a power plant boiler rotary air sensor that can continuously detect the gap between the upper fan-shaped plate of the air preheater and the radial seal of the rotor, with high precision and a large measurement range. preheater gap sensor

Method used

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  • Power station boiler rotary air preheater gap sensor
  • Power station boiler rotary air preheater gap sensor
  • Power station boiler rotary air preheater gap sensor

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Embodiment Construction

[0011] The gap sensor of the rotary air preheater of the utility boiler is composed of a probe, a signal transmitter and a high temperature cable. The probe is an inductive probe. figure 1 As shown, it mainly includes an iron core, a coil and a casing. It is characterized in that the iron core includes a reference iron core 13 and a measurement iron core 14, and the reference iron core and the measurement iron core are installed in a stainless steel casing 3; the iron core adopts C Shaped structure; the gap between the iron core and the shell is filled with magnesium oxide powder. The specific structure of the probe is as figure 1 As shown, it consists of an upper iron core that is the reference iron core 13 and a lower iron core that is the measuring iron core 14, a high-temperature wire 15, a magnetic field line isolation copper plate 5, a coil mounting bracket 6, a coil positioning copper block 7, and a fixed gap Iron plate 10, fixed gap pressing iron plate 12, probe shell...

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Abstract

A gap sensor for the rotary air preheater of boiler used in steam-power plant is composed of the inductor-type probe consisting iron core, coil and shell, signal transducer and refractory electric cable. It features that the reference and measuring iron cores are installed in stainless steel shell and the magnesium oxide powder is filled in the gap in the probe. Its advantages are continuous measuring, large range, self temp compensation, and long service life.

Description

technical field [0001] The invention relates to a gap sensor for a rotary air preheater of a power station boiler, which belongs to the field of detection instruments. Background technique [0002] In the safe and economical operation of modern utility boilers, the safe and stable operation of the rotary air preheater gap control system has a direct impact on the boiler's economy and long-term operation indicators, so it has always been concerned by power generation companies. Rotary air preheater refers to a kind of air preheater in which the rotor rotates and the windshield is fixed. The high-temperature flue gas flows through one side of the rotor from top to bottom, heating the heat storage element in the rotor. When the heated heat storage element is turned to the other side, that is, the air side, the air flows through the heat storage element from bottom to top to take away the heat to achieve the purpose of preheating the air. Because there is a temperature differe...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23L15/00G01B7/15H01F1/36H02K5/04
CPCY02E20/34
Inventor 何荣仁
Owner 上海东方机电科技公司