Unit for detecting liquor level of molten steel by using magnet coil

A technology for liquid level detection and molten steel, which is used in measuring devices, liquid level indicators for physical variable measurement, liquid/fluid solid measurement, etc., which can solve the problems of short measuring range, low sensitivity and high background signal.

Active Publication Date: 2009-09-02
田志恒
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage of the existing technology is that the transmitting coil and the receiving coil in the sensor are separated in space, the volume is large, the sensitivity is low, and the measuring range is short
The sensor coils of the patent CN2318619Y are respectively wound on the coaxially nested inner and outer cylinders to reduce the volume of the sensor, but the mutual inductance coefficient between the transmitting coil and the receiving coil of this coaxial layout is relatively large, and the transmitting coil is generated in the receiving coil. The background signal is high, which affects the measurement sensitivity and stability

Method used

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  • Unit for detecting liquor level of molten steel by using magnet coil
  • Unit for detecting liquor level of molten steel by using magnet coil

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Embodiment Construction

[0013] The first embodiment of the present invention is figure 1 shown. The shell (partially cut) (101a) of the cylindrical sensor (101) installed on the upper flange (103a) of the billet crystallizer (103) (101a) has a relatively small compensation coil (c 1 ) and the transmitting coil (p 1 ) is coaxially wound, which is a geometric condition where the coupling coefficient of the electromagnetic mutual induction between the two coils is relatively large. The receiving coil with more turns (s 1 ) set in the coaxial transmitting coil (p 1 ) and compensation coil (c 1 ) close to one end of the copper tube (103b), and three coils form a nested layout. Receive coil(s 1 ) and the transmitting coil (p 1 ) axes are perpendicular to each other, which is a geometric arrangement with a small electromagnetic mutual induction coupling coefficient between the two coils. This layout makes the transmit coil (p 1 ) and receiving coil (s 1 ) between the electromagnetic mutual induct...

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Abstract

A detection device for detecting the molten steel level of a continuous casting machine crystallizer, which is composed of a sensor, a signal cable and a signal processor. The sensor has a transmitting coil, a receiving coil and a compensation coil nested in each other. The receiving coil and the transmitting coil The axis of the coil is vertical. The sensor can be installed at the mouth of the copper tube of the crystallizer, on the upper flange of the crystallizer or on the top of the copper tube of the crystallizer. The sensor of the liquid level detection device has the advantages of compact structure, high sensitivity and long measurement range, and can be used for detection and control of molten steel liquid level in slab and billet molds.

Description

technical field [0001] The invention belongs to the field of liquid level measurement, and in particular relates to a liquid-steel liquid-level detection device for a crystallizer of a continuous casting machine. technical background [0002] The use of electromagnetic coils to detect the molten steel level in the mold of a continuous casting machine has the advantage of not using radioactive sources. This technology can be divided into two types according to its installation method: the sensor is installed at the mouth of the copper tube of the crystallizer, which is usually called the eddy current type (DE3432987A1), and the sensor is installed on the top of the copper tube of the crystallizer or on the upper flange of the crystallizer. Usually called electromagnetic type (CZ278413B6). The disadvantage of the prior art is that the transmitting coil and the receiving coil in the sensor are separated in space, the volume is bulky, the sensitivity is low, and the measurement...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): G01F23/22B22D11/18
CPCB22D2/003G01F23/26G01F23/261B22D2/00B22D11/00B22D11/16
Inventor田志恒姜虹
Owner田志恒