Liquid level measurement instrument

Abstract

The invention relates to a liquid level measurement instrument. The liquid level measurement instrument comprises a pipe body, a sensor base, a protective cover, a sensor, a rear cover, an outgoing cable, a circuit board and a compression ring, wherein the sensor base is connected with the pipe body in a laser welding mode, the connecting seam between the sensor base and the pipe body serves as a first laser welding point, the outer edge of the sensor base on the right side of the first laser welding point is provided with a first seal ring mounting groove, and an O-shaped seal ring is mounted in the first seal ring mounting groove; the rear cover is connected with the pipe body in a laser welding mode, the connecting seam between the rear cover and the pipe body serves as a second laser welding point, the outer edge of the rear cover on the left side of the second laser welding point is provided with a second seal ring mounting groove, and an O-shaped seal ring is mounted in the second seal ring mounting groove. By the adoption of dual sealing through the seal rings and welding, corrosion and leakage of media can be effectively prevented; by the adoption of a reverse sealing cone blocking structure, the compression ring is effectively protected against corrosion by the media, and assembly space and technology are better.

Description

technical field [0001] The invention relates to the technical field of a sensor for oil field development, in particular to a liquid level measuring device. Background technique [0002] Liquid level measuring instrument is an instrument commonly used in industrial practice and instrumentation control, also called "liquid level gauge". And widely used in oil well industry. At present, the liquid level instruments on the market have different functions, and the price difference is also relatively large. The main disadvantages of domestic liquid level gauges are: first, long-term use of medium corrodes the liquid level gauge tube body and causes the tube body to leak. Second, the structural design is unreasonable and the sealing performance is poor. Third, the power consumption is high, and its control circuit cannot be intelligently protected when the voltage is too large, lightning strikes, etc. [0003] For other products on the market, adjustments need to be made thr...

AI Technical Summary

Problems solved by technology

The main disadvantages of domestic liquid level gauges are: first, long-term use of medium corrodes the liquid level gauge tube body and causes the tube body to leak

Second, the structural design is unreasonable and the sealing performance is poor

Third, the power consumption is high, and its control circuit cannot be intelligently protected when the voltage is too large, lightning strikes, etc.

[0003] For other products on the market, adjustments need to be made through software or special additional function modules. Even if there are buttons, they can only be operated at 5VDC low voltage, which requires high personnel, high cost, and low reliability. Port protection is only a simple overvoltage method. , or with lightning protection but bulky

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