Pneumatic system for internal welding machine

Abstract

The invention provides a pneumatic system for an internal welding machine. The technical problem that in the prior art, walking of an internal welding machine cannot be effectively controlled is solved. The pneumatic system for the internal welding machine comprises a main gas storage tank, a remote-control pressure reducing valve, an adjusting pressure reducing valve, a pneumatic motor and a first electromagnetic valve. The pneumatic motor is used for driving a walking mechanism of the internal welding machine. A gas outlet of the main gas storage tank is connected with the pneumatic motor through a first gas inlet pipeline. The remote-control pressure reducing valve is connected to the first gas inlet pipeline. One end of the adjusting pressure reducing valve is connected with the remote-control pressure reducing valve, and the other end of the adjusting pressure reducing valve is connected with the gas outlet of the main gas storage tank. The first electromagnetic valve is connected between the remote-control pressure reducing valve and the pneumatic motor and is used for controlling the on-off states of the first gas inlet pipeline so as to control starting and closing of the pneumatic motor. The adjusting pressure reducing valve is used for controlling the remote control pressure reducing valve to reduce pressure of inlet gas according to a preset pressure reducing valve so that the gas inlet pressure generated when the pneumatic motor is started can be changed, and therefore the walking speed of the internal welding machine is controlled.

Description

technical field [0001] The invention relates to an intelligent pipeline internal welding system, in particular to a pneumatic system of an internal welding machine. Background technique [0002] At present, the domestic intelligent pipeline internal welding system includes welding unit, traveling mechanism, programmable controller, motor drive unit, sensor, etc. For the forward and backward and braking of the internal welding machine, the expansion and contraction of the positioning cylinder, and the expansion and contraction of the front and rear tension rods In the control process, the main operation panel and the remote operation panel send signals, and the PLC receives the signals, and completes the interlocking of various actions and the sending of signals. The existing walking needs to be driven by the motor drive unit. Since the control range of the motor is difficult to adjust, the existing walking mechanism has the technical problem of inconvenient adjustment of t...

AI Technical Summary

Problems solved by technology

[0004] The embodiment of the present invention solves the technical problem that the walking speed of the internal welding machine cannot be effectively controlled in the prior art by providing a pneumatic system of the internal welding machine, and further realizes the technical effect of being able to effectively control the walking speed of the internal welding machine

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