Control system and self-travelling type construction machinery with same

Abstract

The invention relates to a control system, which is characterized in that a concrete pump drives a reversing electromagnetic valve of a cylinder to reverse after time is delayed for 500ms to 1000ms when the reversing electromagnetic valve receives a signal transmitted from a magnetic switch, an emergency pumping power control oil inlet port is connected with an emergency arm support operation preselector valve, a port P of the emergency arm support operation preselector valve is connected with a diesel driving high-pressure water pump preselector valve, a motor normal driving arm support, a supporting leg and cable reel operation function control oil inlet port, a port P of the diesel driving high-pressure water pump preselector valve is connected with a steering priority control valve, a port P of the steering priority control valve is connected with a brake priority control valve, and a port P of the brake priority control valve is connected with a hydraulic oil pump which is arranged on a chassis and used for controlling braking and steering functions. In another technical scheme, the invention provides self-travelling construction machinery with the control system. The control system and the self-travelling construction machinery meet requirements of concrete pumping, simultaneously are simple in structure of mechanisms, and save cost.

Description

technical field [0001] The invention relates to a system for controlling a self-propelled construction machine when the electric motor is powered off or when the internal combustion engine power of the walking chassis is used, and the self-propelled construction machine with the system. Background technique [0002] Self-propelled construction machinery is mainly used in underground engineering, geotechnical engineering, municipal engineering, especially water conservancy engineering and tunnel engineering construction. The self-propelled construction machinery is used for spray casting of rock walls after tunnel excavation, slope protection and water conservancy construction, and realizes the application of special requirements for concrete quick-setting. [0003] The self-propelled construction machinery involving concrete wet spraying unit is composed of five parts: concrete pump and spray arm, accelerator pumping system, air compressor system and chassis moving system. ...

AI Technical Summary

Problems solved by technology

However, in the construction of tunnels, etc., the following power supply problems are often encountered: due to power failures and other reasons, power outages on the construction site occur from time to time; Thick, so that the voltage received by the self-propelled construction machinery cannot get the normal required voltage due to line loss, usually about 5% lower than normal, and in severe cases it can reach 20% or even lower, and the motor cannot work normally at this time

The disadvantages of this system are: 1. Manual operation is inconvenient, pumping is discontinuous, and pumping displacement is slow; 2. External hydraulic station drives or an independent auxiliary oil pump is installed, which is expensive and inconvenient to operate

Images