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Pilot control and remote control of electro-hydraulic proportional valve of construction machinery
Technological advances in electro-hydraulic proportional valves and other special devices have made it possible to control the electrical control of various systems such as gear, steering, braking and working devices of engineered vehicles. For the general need for displacement output of the mechanism can be used proportional servo control manual multi-way valve driver to complete. Electrical operation has a sound
Should be fast, flexible wiring, can realize the advantages of integrated control and easy interface with the computer, so modern construction machinery hydraulic valve has been more and more the use of electrically controlled pilot control electro-hydraulic proportional valve (or electro-hydraulic switch valve) instead of manual direct operation or hydraulic pilot control of the multi-way valve. Another significant advantage of using electro-hydraulic proportional valves (or electro-hydraulic on-off valves) is that the number of operating handles can be greatly reduced on engineering vehicles, which not only makes the cab layout simple, but also effectively reduces the complexity of operation, which has important practical significance for improving the quality and efficiency of work. With the rapid development of digital wireless communication technology, there has been a wireless remote control system with stable performance, reliable work and suitable for construction machinery. The remote control receiving device arranged on the mobile machinery can convert the received radio signal into the proportional signal controlling the electro-hydraulic proportional valve and the switch signal controlling the electro-hydraulic switching valve, as well as the corresponding signal controlling other devices. So that the original manual operation of each component can accept the command of the remote control electrical signal and carry out the corresponding action, at this time the construction machinery has actually become a remote control type of construction machinery.