With the increasing sales of permanent magnet two-stage compression air compressors, permanent magnet two-stage compression air compressor accessories have become a good market. The more permanent magnet two-stage compression air compressor accessories are used, the more problems are encountered in permanent magnet two-stage compression air compressor accessories. In addition, the differences in the installation, use and maintenance levels of permanent magnet two-stage compression air compressor accessories personnel make some problems immediately solved, which to a certain extent affects the normal operation of permanent magnet two-stage compression air compressor accessories and even endangers the safety of permanent magnet two-stage compression air compressor accessories.
1. Fault judgment and analysis in the application of permanent magnet two-stage compression air compressor accessories
During the measurement process, the transmitter often has some faults. Timely judgment, analysis and processing of faults are crucial for the ongoing air compressor accessories.
Based on the experience in daily maintenance, we have summarized some judgment and analysis methods and analysis processes.
1. Investigation method: Review the ignition, smoke, odor, power supply changes, lightning strikes, moisture, misoperation, and misrepair before the fault occurs.
2. Intuitive method: observe the external damage of the circuit, leakage of the pressure pipe, overheating of the circuit, power switch status, etc.
3. Permanent magnet two-stage compression air compressor accessories detection method:
(1) Permanent magnet two-stage compression air compressor accessories open circuit detection: separate the suspected faulty part from other parts to check whether the fault disappears. If it disappears, determine the fault location, otherwise you can proceed to the next step.
For example: if the permanent magnet two-stage compression air compressor accessories cannot use remote communication normally, the power supply can be disconnected from the meter body, and the transmitter can be powered on for communication by adding another power supply on site to check whether the cable is superimposed with an electromagnetic signal of about 2kHz and interfere with the communication.
(2) Permanent magnet two-stage compression air compressor accessories short circuit detection: Under the condition of ensuring safety, the relevant part of the circuit is directly short-circuited.
For example, if the output value of the differential transmitter is too small, the pressure pipe can be disconnected, and the differential pressure signal can be directly led from the primary pressure valve to both sides of the permanent magnet two-stage compression air compressor accessories, and the transmitter output can be observed to determine the connectivity of the pressure pipe.
(3) Replacement inspection of permanent magnet two-stage compression air compressor accessories: replace the suspected faulty part to determine the fault location.
For example, if the transmitter circuit board is suspected to be faulty, a piece can be temporarily replaced to determine the cause.
4) Partial inspection: divide the measurement circuit into several parts.
For example, power supply, signal output, signal transmission, signal detection, check according to the parts, from simple to complex, from the outside to the inside, narrow the scope, and find the fault location.
2. Working principle of permanent magnet two-stage compression air compressor accessories
The differential pressure from the double-sided pressure pipe directly acts on the isolation diaphragms on both sides of the transmitter sensor, and is transmitted to the measuring element through the sealing liquid in the diaphragm. The measuring element converts the measured differential pressure signal into a corresponding electrical signal and transmits it to the converter, which is amplified and processed to become a standard electrical signal output.
3. Several application measurement methods of permanent magnet two-stage compression air compressor accessories
1. Combined with the throttling element, the differential pressure value generated before and after the throttling element is used to measure the liquid flow.
2. Use the pressure difference generated by the liquid's own gravity to measure the height of the liquid.
3. Directly measure the pressure difference of liquids in different pipelines and tanks.