Pipe jacking machine propulsion system

Main jacking cylinder: The main jacking cylinder is the main equipment of the main jacking device. It is customarily called a jack in engineering. It is the driving force of the pipe section. The main jacking oil cylinder is installed in the pipe jacking operation well and is generally evenly arranged on both sides of the pipe wall. The cylinder is mainly composed of a cylinder block, a piston, a piston rod and a seal. Most of the use of telescopic hydraulic drive piston double-acting cylinder form.

The complete pipe jacking construction generally includes five parts: working well, propulsion system, grouting system, positioning correction system and auxiliary system.
Main Top Unit
The main jacking device is mainly composed of main jacking oil cylinder, main jacking hydraulic pump station, control system, oil pipe, etc.

① Main jacking cylinder: The main jacking cylinder is the main equipment of the main jacking device. It is customarily called a jack in engineering. It is the driving force of the pipe section. The main jacking oil cylinder is installed in the pipe jacking operation well and is generally evenly arranged on both sides of the pipe wall. The cylinder is mainly composed of a cylinder block, a piston, a piston rod and a seal. Most of the use of telescopic hydraulic drive piston double-acting cylinder form.
② Main jacking hydraulic pump station: The pressure oil of the main jacking hydraulic pump station is supplied by the main jacking oil pump through the high-pressure oil pipe.

③ Control system: the advance and retreat of the main top cylinder are controlled by the control system. There are two control modes: electric and manual. The former uses a solenoid valve or electro-hydraulic valve, the latter uses a manual valve.
④ Oil pipe: commonly used oil pipe has steel pipe, high pressure hose, etc., according to the system pressure to choose the form of pipe joints. Commonly used pipe joints are ferrule type and welding type.

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