Electrohydraulic control system for rotation motion of pipe splicing machine

Abstract

The invention discloses an electrohydraulic control system for rotation motion of a pipe splicing machine. The electrohydraulic control system comprises a motor, a constant displacement pump, three overflow valves, an oil return pipe, two three-position four-way proportional reversing valves, a hydraulic lock, a hydraulic motor, a force moment and rotating speed sensor and two pressure sensors. Since the electrohydraulic control system disclosed by the invention adopts the two three-position four-way proportional reversing valves to carry out independent control on the flow of an oil inlet of the hydraulic motor and the backpressure of an oil return port of the hydraulic motor; by controlling the backpressure of the oil return port of the hydraulic motor during an accelerated motion process, a constant motion process and a decelerated motion process of the rotation motion of the pipe splicing machine, the acceleration during the accelerated motion process of the rotation motion of the pipe splicing machine can be increased, the energy consumption during the constant motion process of the rotation motion of the pipe splicing machine and the speed fluctuation under the action of external load variation interference can be reduced, and the stability and the locating accuracy during the decelerated motion process of the rotation motion of the pipe splicing machine can be increased, so that the dynamic characteristic and the stability accuracy of the electrohydraulic control system for the rotation motion of the pipe splicing machine can be increased.

Description

technical field [0001] The invention relates to a fluid pressure actuator, in particular to an electro-hydraulic control system for the rotary motion of a segment assembly machine of a shield tunneling machine. Background technique [0002] The shield tunneling machine is a large and complex excavation equipment used in the construction of non-hard rock geological tunnels. It can realize factory-like and automated operations in the steps of excavation, support, slag discharge, and lining during tunnel construction. Compared with the tunnel construction method using manual excavation, shield tunnel construction is not only safe and efficient, but also greatly improves the quality of the tunnel and reduces the impact on the surrounding environment of the tunnel. Therefore, more and more tunnels use shield tunneling. Tunneling machine for excavation. [0003] The segment assembly machine is a key component of the shield tunneling machine. It is mainly responsible for splicing ...

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