Pressure sensing device applied to high voltage environment

A technology of sensing device and pressure sensor, applied in the direction of measuring device, measuring fluid pressure, instruments, etc., can solve the problems of high temperature, high pressure, high corrosion, catastrophic installation, etc., and achieve the effect of good insulation performance and stable measurement

Inactive Publication Date: 2014-04-23
上海洁晟环保科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] In the industrial production of petroleum, chemical industry, alkali making, chemical fiber, pharmaceutical, food, etc., the pressure measurement of medium (solution, melt) usually encounters problems such as high temperature, high pressure, high corrosion, high viscosity, etc., although these problems are in modern times It has been successfully solved in the industry. However, when the measured medium is in a high-voltage electric field (tens of thousands of volts, hundreds of thousands of volts), the pressure sensor or transmitter with wires will introduce high voltage into the circuit. Due to the existing technology The withstand voltage of the general circuit in the industry is only below one thousand volts, which cannot meet the working requirements of the high-voltage environment. If the device for measuring pressure in the prior art is applied to the high-voltage environment, it will obviously bring major problems to industrial production. Set up with disastrous consequences

Method used

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  • Pressure sensing device applied to high voltage environment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The pressure sensing device is arranged on the pipeline 8, and zero calibration is performed. Set a 35kv positive high pressure on the pipeline 8, pump 10% polyvinyl alcohol / dimethyl sulfoxide solution into the pipeline 8, the solution temperature is 80°C, set the power of the pump so that the pressure sensor 1 can sense it. When the solution 9 flows in the pipeline 8, the reading of the pressure gauge can be read as 0.2MPa; continue to increase the power of the pump so that the reading of the pressure gauge is 0.4MPa; continue to increase the power of the pump to make the reading of the pressure gauge It has been increased to 10MPa. Finally, adjust the reading of the pressure gauge to 5MPa and maintain it for 48 hours. The pressure gauge responds normally, and all accessories are not damaged. When the pump is stopped, the pressure gauge is automatically reset. Thus, it is shown that the pressure sensing device utilizes the setting of the interface member 2, the spacer...

Embodiment 2

[0031] The pressure sensing device is arranged on the pipeline 8, and zero calibration is performed. Set a 40kv negative high pressure on the pipeline or box 8, pump the PE melt into the pipeline 8, the temperature of the melt is 250°C, set the power of the pump so that the pressure sensor 1 can sense it, at this time, the melt 9 is in the pipeline When flowing in 8, the reading of the pressure gauge can be read as 3MPa; continue to increase the power of the pump, so that the reading of the pressure gauge is 7MPa; continue to increase the power of the pump, so that the reading of the pressure gauge can increase to 17MPa. Finally, adjust the reading of the pressure gauge to 14MPa and maintain it for 48 hours. The pressure gauge responds normally, and all accessories are not damaged. When the pump is stopped, the pressure gauge is automatically reset. Thus, it is shown that the pressure sensing device utilizes the setting of the interface member 2, the spacer 5 and the insulatin...

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Abstract

The invention relates to a pressure sensing device, which is used for measuring pressure of flow media under a high voltage environment, and comprises a pressure sensor, an interface piece, an isolation piece and insulation liquid, wherein the pressure sensor is provided with a pressure probe, the interface piece is provided with a through hole, the isolation piece is used for isolating the flow media, the pressure probe and the isolation piece are respectively arranged at the two ends of the interface piece and are oppositely arranged for jointly forming a sealing cavity for containing the insulation liquid, the sealing cavity is filled with the insulation liquid for enabling the pressure probe and the flow media to be in mutual electric insulation, and when the pressure of the flow media is measured, the interface piece is arranged on a carrier for containing the flow media, the isolation piece is contacted with the flow media, and the pressure probe acquires the pressure of the flow media through the insulation liquid and the isolation piece. The pressure sensing device is applicable to measuring for the pressure of flowing liquid or melt under the high voltage environment, and is good in insulation and stable in measurement.

Description

technical field [0001] The invention relates to a pressure sensing device applied in a high-voltage environment, in particular to a pressure sensing device for measuring the pressure of a flowing medium in a high-voltage environment. Background technique [0002] In the industrial production of petroleum, chemical industry, alkali making, chemical fiber, pharmaceutical, food, etc., the pressure measurement of medium (solution, melt) usually encounters problems such as high temperature, high pressure, high corrosion, high viscosity, etc., although these problems are in modern times It has been successfully solved in the industry. However, when the measured medium is in a high-voltage electric field (tens of thousands of volts, hundreds of thousands of volts), the pressure sensor or transmitter with wires will introduce high voltage into the circuit. Due to the existing technology The withstand voltage of the general circuit in the industry is only below one thousand volts, wh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01L19/06
Inventor 张秀芳袁建球沈曦李申初方渡飞顾柏林吴明华
Owner 上海洁晟环保科技有限公司
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