Flow meter convenient to check

Abstract

The invention provides a flow meter convenient to check. The flow meter comprises a flow meter body, a first pipeline connected with the medium inlet of the flow meter body and a second pipeline connected with the medium outlet of the flow meter body, wherein a third pipeline is connected to the first pipeline or the second pipeline, and is communicated with the corresponding pipeline, a switching valve is arranged on the circulation path of the third pipeline, the medium outlet of the third pipeline is used for connection of a plug-in flow meter so as to carry out continuous flow verification on the flow meter body, and the first pipeline or the second pipeline is further provided with an installation part used for installation of an external clamping type flow meter, so that the flow meter body can be calibrated without interrupting flow. Due to the arrangement, the plug-in flow meter and the external clamping type flow meter are convenient to install, so that the processes of point finding, trepanning, welding and the like of the plug-in flow meter in the past are avoided, the processes of point finding, scribing and the like of the outer clamping type flow meter in the past are also avoided, and convenience and quickness are achieved.

Description

technical field [0001] The invention belongs to the technical field of metering equipment, and in particular relates to a flowmeter which is convenient for calibration. Background technique [0002] During the use of the flowmeter, it is usually necessary to regularly check and audit the measurement accuracy of the flowmeter to ensure the accuracy of the flowmeter; Accuracy verification and flow value verification; when the buyer and seller have doubts about their measured values, they also need to verify the accuracy of the flowmeter, so the verification and verification of the flowmeter is inevitable. [0003] In the traditional way of calibrating flowmeters in general pipelines, one needs to periodically remove the flowmeter from the pipeline and send the dismantled flowmeter to a specific agency (authority with credibility) for inspection; however, the When the flowmeter is removed, the supply of the medium to be measured must be stopped first, and the fluid in the pipe...

AI Technical Summary

Problems solved by technology

[0003] In the traditional way of calibrating flowmeters in general pipelines, one needs to periodically remove the flowmeter from the pipeline and send the dismantled flowmeter to a specific agency (authority with credibility) for inspection; however, the When the flowmeter is removed, the supply of the medium to be measured must be stopped first, and the fluid in the pipeline must be emptied. In this way, it is not only extremely difficult to disassemble the flowmeter, but it is also not easy to implement, and it takes a lot of time to disassemble. Operating time and manpower, at the same time, also interrupt the operation, which in turn affects the operating procedures of the industry, which is extremely uneconomical

The second is to use higher-level flowmeters for online calibration and auditing. Most of them use external clamp-on ultrasonic flowmeters for calibration, but the installation of this external clamp-on ultrasonic flowmeter is troublesome and inaccurate. Affects the reliability of calibration and audit; there is also an online continuous flow calibration and audit using an insertion flowmeter; but this method requires drilling and welding of the pipeline, which increases the difficulty of construction

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