A Portable Electro-hydraulic Proportional Valve Fault Diagnosis Instrument

Abstract

The invention relates to a portable electro-hydraulic proportional valve fault diagnosis instrument, which comprises a box body and a testing device arranged in the box body. The test device includes an operating table, a power supply unit, a current signal type test unit, a current signal type test unit, a voltage signal type test unit, a PWM signal type test unit and an enabling switch group. The current signal type test unit, the voltage signal type test unit and the PWM signal type test unit are respectively connected with the output end of the power supply unit and the enabling switch group. The operating table is provided with a current signal interface device, a voltage signal interface device and a PWM signal interface device for connecting to the electro-hydraulic proportional valve, and a data communication interface for connecting with an external programmer. The portable electro-hydraulic proportional valve fault diagnosis instrument is easy to carry to various equipment sites, can quickly identify whether the electro-hydraulic proportional valve is faulty, and can also be used as a signal generator for the electro-hydraulic proportional valve.

Description

technical field [0001] The invention relates to a portable electro-hydraulic proportional valve fault diagnosis instrument applied to the production site. Background technique [0002] At present, since the electro-hydraulic proportional valve can be combined with the electronic control device, it is convenient to process various electrical signals and realize complex control functions. At the same time, it has the characteristics of anti-pollution, low cost and fast response, and is widely used in hydraulic control equipment in many industries such as metallurgy and machinery manufacturing. Because electro-hydraulic proportional valves are widely used and technically difficult, effective monitoring of the working status of electro-hydraulic proportional valves and rapid identification and handling of electro-hydraulic proportional valve failures are a strong guarantee for the stable operation of equipment used in electro-hydraulic proportional valves . [0003] Most of th...

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Problems solved by technology

[0003] Most of the equipment using electro-hydraulic proportional valves has complex functions, a large number of devices, a high degree of automation and is closely integrated with the electrical control system

For example, the Chinese invention patent "An Electro-hydraulic Proportional Valve Test System for Variable Nozzle Ring Section Turbocharger" with the authorized announcement number CN101566530B (application number 200910039345.7), and the Chinese patent with publication number CN1702007A (application number 200510040235.4) Invention patent application "Vehicle Four-wheel Independent Steering Mechanism and Its Control Method", in which the electro-hydraulic proportional valve is used in the disclosed schemes to realize the control of the system, but once the equipment with the electro-hydraulic proportional valve fails, the judgment Whether the fault is caused by the abnormality of the electro-hydraulic proportional valve, due to the interference of various factors such as abnormal electrical components, complex interlocking conditions of the control program, and large technical differences between mechanical and electrical majors, it will bring great difficulties to the search for the cause of the fault. It is very difficult and leads to longer troubleshooting time, which brings huge economic losses to the production enterprises

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