Gas-liquid dual-purpose intelligent pressure balancing device for expansion joint fatigue test

Abstract

The invention discloses a gas-liquid dual-purpose intelligent pressure balancing device for an expansion joint fatigue test. The gas-liquid dual-purpose intelligent pressure balancing device comprisesan oil tank; the upper end of the oil tank is connected with a filter; the oil tank is connected with a hydraulic pump through the filter; one side of the hydraulic pump is electrically connected with a motor; the other side of the hydraulic pump is connected with one end of a first electromagnetic overflow valve; the upper end of a water tank is connected with a water pressure circulating system; the upper end of the water pressure circulating system is connected with an air pressure circulating system in parallel; the water pressure circulating system and the air pressure circulating systemare both connected with a pressure balance converter; an electronic digital display ammeter is used to monitor experiment data in real time. When the pressure of a test product drops sharply or a system breaks down, the test is stopped emergently, safety and reliability of the test are guaranteed, a double-insurance structure is adopted, overvoltage and overload protection can be achieved, one-key start and stop and unattended operation can be achieved through the PLC system and the four-column hydraulic machine, the automation degree is high, the structure is simple, operation is convenient,and maintenance is easy.

Description

technical field [0001] The invention relates to the technical field of expansion joints, and specifically relates to a gas-liquid dual-purpose intelligent pressure balance device for expansion joint fatigue tests. Background technique [0002] With the continuous development of my country's economy, the country's emphasis on scientific and technological innovation is also deepening, especially in the fields of electric power, semiconductors, instrumentation, aerospace, medical care, locomotives, petrochemicals, valves, etc. The country has issued many policies one after another. It has promoted the implementation of a large number of national and local key projects. As a flexible compensating element in the layout of pressure piping, the expansion joint not only needs to be used as a pressure piping element to compensate for the thermal expansion and contraction of the pipeline caused by temperature changes and the vibration reduction and vibration isolation of the equipment ...

AI Technical Summary

Problems solved by technology

Nowadays, expansion joints are mostly used in complex working conditions and harsh environmental conditions, and are not easy to maintain and replace. This requires a long service life and high fatigue times for expansion joints. Accuracy and efficiency put forward higher requirements, and the actual engineering situation shows that most of the failures of expansion joints are caused by fatigue, mainly manifested in unpredictable fatigue damage caused by tension or compression of expansion joints under load , so in order to check the reliability of the product, it is very important to verify the fatigue life of the product

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