XCMG XDN450, Operation Manual

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Chapter Two Product Information
2.1 Product Overview
2.1.1 Product usage
XDN450 pipe jacking machine is a kind of construction machinery to set various
underground public utilities in the condition of not or slightly excavating the earth’s surface. This
kind of construction machinery is widely used to set pipes for water, coal gas, electric power,
natural gas and petroleum supply and communication passing though highways, railways,
buildings, rivers, downtown area, historic reservation, crop and vegetation protection zones
which are difficult to excavate.
2.1.2 Product operating principle
The main structural functions of the XDN450 pipe jacking machine are divided into
downhole installation operations, main jacking operations, downhole pipe jacking operations and
well operations.
Downhole installation operations: Install the main jacking device in the initiating well then
perform welding and fixing; Place the main jacking device on the guide rail Z of the main
jacking cylinder device through the lifting device, install the mud pipeline, connect the wire
harness, etc., and then calibrate the laser theodolite, rotation angle and tilt angle.
Main jacking operations: The motor-driven hydraulic pump provides power to the main
jacking cylinder, and pushes the main jacking device through the jacking iron and the jacking
ring, and then pushes the main jacking device into the formation; The main jacking cylinder is
retracted to the end when the jacking is completed.
Downhole pipe jacking operations:The pipe is placed on the guide rail of the main top
device with the lifting device; The mud pipe and the connection harness are installed; the motor
driven hydraulic pump provides power to the main jacking cylinder, and then the pipe is pushed
through the jacking iron and the jacking ring to
complete
. Repeat this operation until all pipes are
laid
Well operation: After the main jacking device reaches the receiving well, dismantle the
shell, mud pipe and wire harness, etc., and remove the head, mud pipe and wire harness through
the lifting device until the top pipe operation is completed.
2.1.3 Method summary
This equipment adopts the slurry pressure balance type jacking method, and the mud type
jacking method uses the mud pump to send the mud pump to the sealed mud room of main
jacking device. The pressurized mud water and the machine head keep the excavation surface
stable and rotate at the same time. The cutterhead of the pipe jacking machine is used to cut and
excavate the soil layer, and then the sludge is sent to the muddy water treatment equipment by
the mud mud pipe, and then the mud water is sent to the mud supply room. Slurry is generally
Product information ! 31