CN101063627A - Inductance type single-point liquid metal level meter - Google Patents

Abstract

Translated fromChinese

本发明公开了一种电感式单点液态金属液位计，它由液位传感器、交流稳压电源箱和报警装置组成，其中液位传感器是一种非接触式液态金属液位传感器，它由一个一端密封的套管和插在套管中的敏感元件组成，所述的敏感元件由2根双芯铠装电缆中的两根芯线分别作为桥路的4个绕组盘绕在一根铁芯的上、下段上而组成的。本发明的液位传感器是一种非接触式液态金属液位探测手段，避免了电接点式液态金属液位计所固有的那些缺点，可以承受高达600℃高温的长期作用，可靠性高，具有良好的灵敏度和准确度，适合于单点高温液态金属液位精确测量。

The invention discloses an inductive single-point liquid metal level meter, which is composed of a liquid level sensor, an AC stabilized power supply box and an alarm device. The liquid level sensor is a non-contact liquid metal level sensor, which is composed of It consists of a casing sealed at one end and a sensitive element inserted in the casing. The sensitive element is composed of two core wires in two double-core armored cables, each serving as a bridge and four windings coiled around an iron core. It is composed of upper and lower sections. The liquid level sensor of the present invention is a non-contact liquid metal level detection method, which avoids the shortcomings inherent in the electric contact liquid metal level meter, can withstand long-term effects at high temperatures up to 600°C, has high reliability, and has Good sensitivity and accuracy, suitable for precise measurement of single-point high-temperature liquid metal level.

Description

Electric inductance type single-point fluent metal juice level indicator

Technical field

The invention belongs to the level gauging technical field, be specifically related to a kind of electric inductance type single-point fluent metal liquid level emasuring device.

Background technology

Liquid metal is the metal of high conductivity, and its level measuring method all is based on the technology of conductivity at present, and its liquid level emasuring device commonly used is the electric contact type liquid metal level meter.The electric contact type liquid metal level meter is a kind of direct contact type liquid level gauge, and its running principle is very simple, promptly is elevated to when contacting with electrode the external circuit connection when the liquid metal liquid level.The shortcoming of electric contact type liquid metal level meter is: (1) liquid metal steam may condense in the insulation, destroys insulation, causes misconnection logical; (2) metal oxide is deposited on the electric contact, when making this conducting and can not connect.Therefore it only is applicable to the short-term measurement that temperature is lower.

Summary of the invention

The objective of the invention is to design a kind of simple in structure, safe and reliable, accuracy is high, can be used as normative reference is carried out field calibration to the liquid metal level meter of other form liquid metal level meter.

The present invention is to provide a kind of electric inductance type single-point fluent metal juice level indicator, it is made up of liquid level sensor, alternating current steady voltage plug and light beam display alarm instrument.Key is that used liquid level sensor is a kind of contactless liquid metal liquid level sensor, it is made up of the sleeve pipe of one one end sealing and the sensitive element that is inserted in the sleeve pipe, and described sensitive element is coiled in upper and lower period last composition of an iron core respectively as 4 windings of bridge circuit by two heart yearns in 2 twin-core sheathed cables.

Said alternating stable source case is made up of sine-wave oscillator, power amplification and voltage stabilizing-pressure regulation unit, AC-DC converting unit and amplifying unit.

Described twin-core sheathed cable is to be that involucrum, magnesium oxide are the twin-core sheathed cable of insulation with the stainless steel.

Liquid level sensor provided by the present invention is a kind of contactless liquid metal level detection means, its sensitive element is contained in the stainless steel sleeve pipe of radicle sealing, do not destroy the sealing of liquid metal equipment, can under the equipment operation situation, change and keep in repair.Avoided the electric contact type liquid metal level meter intrinsic those shortcomings, can bear long term up to 600 ℃ of high temperature, the reliability height has good sensitivity and accuracy, is suitable for single-point high temperature fluent metal liquid level and accurately measures.

Description of drawings

Fig. 1 electric inductance type single-point fluent metal liquid level sensor principle assumption diagram;

Fig. 2 sensor winding bridge circuit figure;

Fig. 3 sensor output voltage and liquid metal flood the height relationships curve;

Fig. 4 measuring system block diagram.

Embodiment

Below in conjunction with accompanying drawing the present invention is described in further detail.

Fig. 1 represents the principle assumption diagram of electric inductance type single-point fluent metal liquid level sensor.Sensor mainly comprises the stainless steel sleeve pipe (4) of sensitive element and end sealing, and wherein sensitive element is inserted in the stainless steel sleeve pipe (4), and this sleeve pipe (4) then is immersed in the liquid metal.Sensitive element be with the stainless steel be cladding materials, magnesium oxide be the insulation the twin-core sheathed cable in two heart yearns be coiled on iron core (2) epimere and the hypomere as winding 1A-2A, 1B-2B and 3A-4A, 3B-4B respectively, sheathed cable is through in the cable duct tube (1) and draws.Iron core (2) is fixed on the cable duct tube (1).Form as shown in Figure 2 bridge circuit by winding 1A-2A, 1B-2B, 3A-4A and 3B-4B.Bridge circuit is the alternating current steady voltage plug power supply of 4～8kHz by frequency, and present embodiment uses the alternating current steady voltage plug power supply of optimum frequency 6kHz.Take out the output voltage E of sensor from the bridge circuit diagonal line.

When the naked dew of sensitive element, when not flooded by liquid metal, by adjusting balanced potentiometer R, making sensor output voltage E is minimum value.When the liquid metal liquid level rises, along with the No.1 winding is flooded by liquid metal, produce inductive loop in the liquid metal, make 1A-2A, the impedance of 1B-2B winding change, cause bridge circuit uneven further.When the liquid metal liquid level arrived sensitive element central area M, bridge circuit reached maximum uneven point, and this moment, sensor output voltage was maximal value Em.When the liquid metal liquid level continued to rise, along with the No.2 winding is flooded by liquid metal, bridge circuit returned to equilibrium state again, and this moment, sensor output voltage E returned to minimum value again.Like this, the sensing station absolute altitude in the time of can the sensor output voltage peak value occurring by measurement is accurately measured the liquid metal liquid level.Fig. 3 expresses sensor output voltage floods height with liquid metal situation of change.No.1 shown in Figure 1 and No.2 winding all adopt dual winding, and dual winding is arranged on as shown in Figure 2 the bridge circuit opposite side, and purpose is to improve sensitivity.The remolding sensitivity simplex winding bridge circuit that this bridge circuit is arranged has improved 1 times.

Fig. 4 represents the measuring system block diagram of the electric inductance type single-point fluent metal juice level indicator that present embodiment provides.Wherein, it is the stable sine wave of 6kHz that sine-wave oscillator (5) produces frequency, through power amplification and voltage stabilizing-pressure regulation unit (6), provides the interchange burning voltage that frequency is constant, effective value is adjustable U₁Give the bridge circuit of sensor (7).Output voltage E on the sensor bridge circuit diagonal line provides 0-5V DC voltage U behind AC-DC converting unit (8) and amplifying unit (9)₂Give light band alarm indicator (10).When occurring the light beam peak value on the light band alarm indicator, just know that this moment, the liquid metal liquid level was in the sensitive element central area of sensor, and can determine the liquid metal liquid level thus.

In Fig. 4, unit (5), (6), (8), (9) are combined in a cabinet---in the alternating stable source case (11).Sensor is connected with 4 core sockets of alternating stable source case rear panel by two double core shielding cables (12), (13).Light band alarm indicator (10) is connected with the twin-core socket of alternating stable source case rear panel by double core shielding cable (14).Take commercially available SXG type light band alarm indicator." zeroing of the sensor bridge circuit " potentiometer that is furnished with " sensor output voltage test " terminal and matches on the front plate of alternating stable source case, the latter is used for bridge balancing and regulates." voltage-regulation " potentiometer that also is furnished with " test of sensor input voltage " terminal on the front plate and matches, the latter is used to regulate the input voltage of sensor, that is the output voltage of alternating current steady voltage plug.The front plate lower right corner is furnished with power switch and pilot lamp.

The electric inductance type single-point fluent metal juice level indicator that uses present embodiment to provide can be used for the level gauging of liquid metal sodium, potassium, Na-K alloy, sn-bi alloy.Its measuring accuracy reaches ± 2mm.

Obviously, those skilled in the art can carry out various changes and modification to the present invention and not break away from the spirit and scope of the present invention.Like this, if of the present invention these are revised and modification belongs within the scope of claim of the present invention and equivalent technologies thereof, then the present invention also is intended to comprise these changes and modification interior.

Claims (5)

Translated fromChinese

1.一种电感式单点液态金属液位计，它由液位传感器、交流稳压电源箱(11)和光柱显示报警仪(10)组成的测量系统，其特征在于所述的液位传感器是一种非接触式液态金属液位传感器，它由一个一端密封的套管(4)和插在套管(4)中的敏感元件组成，所述的敏感元件由2根双芯铠装电缆中的两根芯线分别作为桥路的4个绕组(3)盘绕在铁芯(2)的上、下段上而组成。当光柱显示报警仪出现光柱峰值时，就可知道此时液态金属液位正处于传感器的敏感元件中心区域，并由此可以精确确定液态金属的液位高度。1. An inductive single-point liquid metal liquid level gauge, it is a measuring system made up of a liquid level sensor, an AC stabilized power supply box (11) and a beam display alarm (10), characterized in that the liquid level sensor It is a non-contact liquid metal liquid level sensor, which consists of a sleeve (4) sealed at one end and a sensitive element inserted in the sleeve (4). The sensitive element is composed of two double-core armored cables The two core wires in the bridge form four windings (3) coiled on the upper and lower sections of the iron core (2). When the light column shows the peak value of the light column on the alarm instrument, it can be known that the liquid metal level is in the central area of the sensitive element of the sensor at this time, and thus the liquid level height of the liquid metal can be accurately determined.2.根据权利要求1所述的电感式单点液态金属液位计，其特征在于，所述的交流稳压电源箱是由正弦波振荡器(5)、功率放大与稳压-调压单元(6)、交流-直流转换单元(8)和放大单元(9)组成。2. The inductive single-point liquid metal level gauge according to claim 1, characterized in that, the AC stabilized power supply box is composed of a sine wave oscillator (5), a power amplifier and a voltage stabilizing-voltage regulating unit (6), an AC-DC conversion unit (8) and an amplification unit (9).3.根据权利要求1所述的电感式单点液态金属液位计，其特征在于，所述的双芯铠装电缆是以不锈钢为包壳、氧化镁为绝缘的双芯铠装电缆。3. The inductive single-point liquid metal level gauge according to claim 1, wherein the double-core armored cable is a double-core armored cable with stainless steel as the sheath and magnesium oxide as the insulation.4.根据权利要求1所述的电感式单点液态金属液位计，其特征在于，传感器(7)的桥路使用的电源频率为4～8kHz。4. The inductive single-point liquid metal level gauge according to claim 1, characterized in that the power supply frequency used by the bridge circuit of the sensor (7) is 4-8 kHz.5.根据权利要求4所述的电感式单点液态金属液位计，其特征在于，传感器(7)桥路使用的电源最佳频率为6kHz。5. The inductive single-point liquid metal level gauge according to claim 4, characterized in that the optimal frequency of the power supply used by the sensor (7) bridge circuit is 6kHz.

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