Remote real-time liquid pressure measurement system

A technology of real-time measurement and liquid pressure, which is applied in the direction of fluid pressure measurement using liquid as a pressure-sensitive medium. It can solve the problems of difficult replacement and maintenance, and easy damage of pressure components, so as to avoid difficult replacement and maintenance, avoid damage, and ensure safety. high effect

Active Publication Date: 2017-07-07
TSINGHUA UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of this invention is to propose a remote real-time measurement system for liquid pressure, so that the pressure sensing element of the system is far away from the measurement point, without continuous gas input, thereby solving the problem that the pressure element is easily damaged and difficult to replace and maintain under harsh measurement conditions, and at the same time Avoid the adverse effect of gas input on the system to be measured, so as to better realize the real-time monitoring of liquid pressure in the nuclear chemical process and ensure the normal operation of nuclear chemical equipment

Method used

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  • Remote real-time liquid pressure measurement system

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Embodiment 1

[0020] Evaporation and enrichment equipment is one of the commonly used equipment in the nuclear fuel reprocessing industry, and its common form is an evaporation kettle. During the evaporation process, it is necessary to monitor the liquid level in the kettle to control the heating power and determine the end point of evaporation. One of the most commonly used methods is to determine the liquid level by measuring the pressure of the liquid at the bottom of the tank. A remote pressure measurement system is installed at the bottom of the evaporator, and the liquid level can be monitored in real time through a simple conversion of the relationship between the pressure and the liquid level. The pressure measuring box is installed on the side of the kettle, and the comparison tube and measuring tube with a length of about 5 meters are remotely connected to the differential pressure sensor, solenoid valve, pressure measuring instrument and other components to realize remote measure...

Embodiment 2

[0022] Pulse extraction column is one of the commonly used extraction equipment in nuclear chemical industry. Its column weight and pressure drop is one of the main parameters of its hydraulic performance. In nuclear chemical industry, it is often used to judge the operation of pulse column and determine whether it has liquid pan. A remote pressure measurement system is installed at the bottom of the pulse column, which can monitor the change of its column weight over time in real time. The pressure measurement box is installed on the bottom side of the pulse extraction column, and the remote measurement is realized by remotely connecting the differential pressure sensor, solenoid valve, pressure measuring instrument and other components through the comparison tube and the measuring tube with a length of about 20 meters. The pressure measuring instrument uses a pressure sensor connected to the computer to monitor the pressure drop of the column weight in real time on the compu...

Embodiment 3

[0024] By installing remote pressure measurement systems on the upper and lower parts of the liquid-liquid two-phase interface of the pulse column, and measuring the pressure difference, the interface position can be calculated, thereby realizing real-time monitoring of the pulse column interface. The monitoring of the interface position is crucial to the operation control of the pulse column. It is used as an input signal to feed back to the discharge system, and the discharge system controls the interface to change within a reasonable range to ensure the normal operation of the pulse column. In actual implementation, two pressure measuring boxes are installed on the upper and lower parts of the liquid-liquid two-phase interface of the pulse column, with a height difference of 300 mm, and the respective differential pressure sensors and solenoid valves are remotely connected through a comparison tube and a measuring tube with a length of about 20 meters. and other components, ...

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Abstract

The invention discloses a remote real-time liquid pressure measurement system, which belongs to the technical field of nuclear chemical equipment. The system comprises a device stored with a to-be-measured liquid, a pressure measurement box and an air supplementing system, wherein the pressure measurement box is connected with the device stored with the to-be-measured liquid through a connection pipe; the pressure measurement box is separated into a pressure room and a measurement room vertically communicated through a separator; the upper half part of the measurement room is provided with an inverted cup to be connected with a measurement pipe; the top part of the pressure measurement box is connected with a pressure difference sensor through a comparison pipe; the pressure difference sensor measures the pressure difference between the comparison pipe and the measurement pipe, an electromagnetic valve is controlled through the pressure difference signals, compressed air is then controlled to supplement air to the pressure measurement box, the liquid level in the pressure measurement box is ensured to be lower than the bottom part of the inverted cup, and the air is ensured not to enter the to-be-measured liquid at the same time; and the measurement pipe is connected with a pressure measurement end, and the pressure of the to-be-measured liquid is obtained through measuring the air pressure. According to the measurement system of the invention, while remote measurement is realized, interference influences on a to-be-measured system are little, and the measurement system has an important application prospect in nuclear chemical industry and particularly in the field of irradiated fuel reprocessing.

Description

technical field [0001] The invention belongs to the technical field of chemical and chemical industry measurement, in particular to a remote measurement system for liquid pressure in nuclear chemical process equipment. Background technique [0002] In many fields such as chemical industry, petrochemical, pharmaceutical and food, especially in the process of nuclear chemical industry, the remote measurement of liquid pressure in equipment is an important technology. For the liquid pressure measurement of general chemical process, the pressure sensing element can be directly set at the measurement point for measurement, but for some chemical processes with relatively harsh conditions, this method cannot be applied. For example, for the pressure measurement of radioactive fluid in nuclear chemical industry, the life of the pressure sensing element set at the measurement point is greatly shortened by the influence of radiation, and the replacement and maintenance of the element ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L7/18
CPCG01L7/18
Inventor 李少伟景山吴秋林
Owner TSINGHUA UNIV
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