Pipeline air pressure on-line detector and detection method

Abstract

The invention discloses a pipeline air pressure on-line detector, comprising detection parts, a hand valve and an air inlet pipe. The detection parts comprise a piston housing, a piston and a piston rod, wherein one end of the housing is provided with a chamber cover, one end of the piston rod passes through the chamber cover, the piston rod is provided with a scale and both sides of the piston are respectively provided with a detection spring. The invention also discloses another pipeline air pressure on-line detection method. Under the conditions that the air inlet pipe communicates with the pipeline to be detected and the hand valve is opened, the piston moves under the effect of pipeline air pressure and the piston rod is driven to stretch. The air pressure state value of the pipeline can be detected through the reading of the scale. Therefore, the measuring apparatus has advantages such as high measurement accuracy, on-line detection option, positive and negative air pressure detection option, simple and convenient operation, high efficiency and the like.

Description

technical field [0001] The invention relates to pipeline air pressure detection technology, more specifically, to an online pipeline air pressure detector and a detection method. Background technique [0002] In the detection work of the instrument system, the air pressure state of the secondary instrument sampling pipeline has a direct impact on the accuracy of the measurement. Since the pipeline is an effective way to transmit the control object to the detection system through the medium, it needs to be tight and not affected by external factors. Only in this way can the accuracy of the transmission process be guaranteed. Therefore, the correctness of the pipeline air pressure state is to ensure the control One of the important requirements of system reliability. In the actual operation process, the pipeline joints are loosened due to the vibration of the site environment, the pipeline is cracked due to the long-term outdoor layout aging, the pipeline has trachoma due to ...

AI Technical Summary

Problems solved by technology

[0006] (3) For the pipeline detection of important instruments, it cannot be done in real time, and the data must be collected offline

[0007] However, the existing detection method takes a long time from work intervention to problem solving, often requires auxiliary means such as scaffolding due to the problem of the installation position of the pipeline, and if the soap liquid itself is not applied evenly, the fault point is easily overlooked, so it is very important for the staff The operation requirements are very high, and if there is any omission during work, the real cause of the failure cannot be found; and for the negative pressure pipeline, a certain positive pressure must be provided, so an auxiliary air source must be installed, which increases the workload; the most important thing is that the original The detection method will involve multiple devices in the same pipeline. Once it is operated offline, it will have a wide range of impacts. Therefore, the maintenance work requirements for regular status monitoring of important equipment pipelines is even less feasible under the existing detection methods. Until now, it is still cannot effectively solve the above problems

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