Enclosed uplift pressure measuring structure

Abstract

The invention discloses a closed type uplift pressure measuring structure, and discloses a closed type structure for measuring the water level. A pressure transmitter does not make contact with waterin the measurement process, and thus, tends not to corrode and is long in service life. The structure comprises a measuring tube, the pressure transmitter and plugs, and is characterized in that twoends of the measuring tube are sealed by the plugs; the pressure transmitter is installed on a plug at the top of the measuring pipe, a sensing unit of the pressure transmitter goes deep into the measuring pipe, and the measuring pipe is formed by connecting a plurality of hollow pipes through a connecting sleeve so that the hollow pipes can be spliced according to the water depth in the using process.

Description

technical field [0001] The invention discloses a closed uplift pressure measuring structure, which relates to a closed structure for measuring water level and belongs to the field of water conservancy equipment. In particular, it relates to a structure with reliable performance for measuring the water level by detecting the air pressure in the pipe. Background technique [0002] At present, in the field of water conservancy, water seepage occurs in reservoir dams due to quality problems. If local seepage exceeds a certain limit, the dam may deform and collapse, which will cause great losses to the downstream watershed. In order to ensure the safe operation of the reservoir, several logging wells lined with steel pipes and with a diameter of about 10cm are generally opened at various parts of the dam during construction of the dam, so as to regularly measure the water level elevation value of each well (that is, the uplift pressure), and timely Find hidden dangers and carry ...

AI Technical Summary

Problems solved by technology

[0002] At present, in the field of water conservancy, water seepage occurs in reservoir dams due to quality problems. If local water seepage exceeds a certain limit, the dam may deform and collapse, which will cause great losses to the downstream watershed.

In order to ensure the safe operation of the reservoir, several logging wells lined with steel pipes and with a diameter of about 10cm are generally opened at various parts of the dam during construction of the dam, so as to regularly measure the water level elevation value of each well (that is, the uplift pressure), and timely Find hidden dangers and carry out maintenance. The traditional measuring pipe used to observe the uplift pressure of the dam is a seepage pipe with a sealed bottom. Most of the piezometric pipes are equipped with water level transmitters for electrical measurement. It is easy to be blocked during use, and due to The bottom is sealed, it is difficult to clean and repair after clogging, and it is scrapped, and the water level transmitter is soaked in water during the measurement process, which is easy to corrode, has a short life, and is not effective in use. The way to measure the water level is troublesome to install and the cost is high;

[0003] Publication number CN205620079U discloses a new type of piezometric pipe for hydraulic engineering uplift pressure, which includes a U-shaped pipe body. The conduit and the U-shaped connecting pipe connecting the lower ends of the two water-permeable pipes. The U-shaped pipe body is covered with a U-shaped sleeve. The diameter of the U-shaped sleeve is larger than that of the U-shaped pipe body. The pipe wall inside the casing, and there is a cavity between the U-shaped pipe body and the pipe wall outside the U-shaped casing. The permeable pipe is provided with a plurality of permeable holes. There is a through hole matching the permeable hole on the U-shaped casing, and a vent hole is provided at the bottom of the U-shaped connecting pipe. The outside of the vent hole is covered with a polytetrafluoroethylene air filter membrane. The electrical measuring sensor is connected with a cable lead wire, which is led out from the nozzle of the U-shaped tube body. When in use, the sensor needs to be submerged in water to perform measurement. Long-term immersion is prone to corrosion, which affects the measurement accuracy, and the production cost of the device is high. Application Ineffective

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