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Specific heat liquid level meter

A technology of specific heat and heating liquid, which is applied in the field of material level measurement method and device for realizing the method, can solve the problem of reducing measurement accuracy, the inability of radar level gauge to measure the liquid level of high temperature medium, and the inability to measure the liquid level of non-conductive medium, etc. problems, to achieve the effect of a wide range of applications

Active Publication Date: 2015-10-28
BEIJING JTKS INSTR TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Among them, the ultrasonic level gauge cannot measure the liquid level in a vacuum state; the nuclear radiation level gauge will cause radiation damage to the human body; there are air bubbles in the reactor, and the measurement of the radar level gauge or ultrasonic level gauge will be interfered, reducing the measurement accuracy , radar level gauges and ultrasonic level gauges are not suitable for liquid level measurement of high-temperature media; capacitive liquid level gauges cannot measure the liquid level of non-conductive media
In combination with the above, it can be seen that in non-applicable conditions, the measurement accuracy of the corresponding liquid level gauge is greatly reduced, and even cannot be measured normally. Therefore, the existing liquid level gauge has a narrow application range and cannot meet a multi-purpose liquid level measurement.

Method used

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Examples

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Effect test

Embodiment 1

[0060] Such as figure 1 As shown, taking liquid level measurement as an example, this embodiment provides a material level gauge for measuring liquid level, that is, a liquid level gauge. The liquid level gauge utilizes the specific heat and heat transfer coefficient of liquid and gaseous states Different characteristics, combined with the circulating fluid (circulating medium), detect the detection temperature in the liquid phase and the gas phase through several temperature detection elements, and determine the liquid level position according to the change of the detection temperature.

[0061] Specifically, the liquid level gauge includes a "U"-shaped circulation pipe, a cooling device, an insertion part and a transmitter 106; wherein, the cooling device is composed of a compressor 101, a Freon tube 102, a Freon 104, a refrigeration thermometer 105, The pressure transmitter 103 and the insulating material are filled with oblique lines. The insertion part is composed of a f...

Embodiment 2

[0068] Such as figure 2 As shown, the liquid level gauge in this embodiment includes a "U"-shaped circulation pipe, a cooling device, an insertion part and a transmitter 206. Wherein, the cooling device is composed of a compressor 201, a freon tube 202, a freon 204, a refrigeration thermometer 205, a pressure transmitter 203 and an oblique line filling of an insulating material. The insertion part is composed of a flange 207 , a material level temperature detection element 208 , an insulating material 209 between temperature sensors, a material level temperature detection element 210 , a medium temperature detection element 211 , and an outer casing 212 . Transmitter 206 receives all temperature sensor signals, pressure transmitter signals and external power supply, provides power and control signals to the compressor, and sends out a 4-20mADC current signal corresponding to the liquid level. The signal lines of each material level temperature detection element are separatel...

Embodiment 3

[0070] Such as image 3 As shown, the liquid level gauge in this embodiment includes a "U"-shaped circulation pipe, a cooling device, an insertion part and a transmitter 306. Wherein, the cooling device is composed of a compressor 301, a freon tube 302, a freon 304, a freon thermometer 305, a pressure transmitter 303 and an oblique line filling of insulating material. The insertion part is composed of flange 307, material level temperature detection element 308, heat insulating material 309 between temperature sensors, material level temperature detection element 310, medium temperature detection element 311, and outer casing 312. Because the container is stirred, it also includes a resistant Agitate the support tube (not shown). Transmitter 306 receives all temperature sensor signals, pressure transmitter signals and external power supply, provides power and control signals to the compressor, and sends out 4-20mADC current signals corresponding to the liquid level. The diff...

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Abstract

The invention discloses a specific heat liquid level meter. With the specific heat liquid level meter adopted, problems such as narrow use range and being seriously affected by measurement work conditions existing in an existing liquid level meter can be solved. According to the specific heat liquid level meter, a circulating medium of which the temperature is different from that of a to-be-measured medium is adopted; and based on a situation that the specific heat and heat transfer coefficient of the to-be-measured medium in a container are different from those of a non to-be-measured medium, detection temperature in the to-be-measured medium and the non to-be-measured medium is detected through a plurality of temperature detecting elements, and an interface of the to-be-measured medium and the non to-be-measured medium is determined according to the change of the detection temperature. The specific heat liquid level meter is practical and reliable, and is not limited of any measurement work conditions, and has a wide application range.

Description

technical field [0001] The invention relates to a measuring device, in particular to a material level measuring method and a device for realizing the method. Background technique [0002] In chemical production, it is often necessary to measure the liquid level of containers or reactors (hereinafter collectively referred to as containers), and liquid level measurement is realized by liquid level gauges. In the prior art, liquid level gauges mainly include radar liquid level gauges, ultrasonic liquid level gauges Level gauge, capacitive level gauge, nuclear radiation level gauge. Among them, the ultrasonic level gauge cannot measure the liquid level in a vacuum state; the nuclear radiation level gauge will cause radiation damage to the human body; there are air bubbles in the reactor, and the measurement of the radar level gauge or ultrasonic level gauge will be interfered, reducing the measurement accuracy , Radar level gauges and ultrasonic level gauges are also not suitab...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F23/22
Inventor 张洪彬张俊英
Owner BEIJING JTKS INSTR TECH CO LTD
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