What is HONGHUA Mud Pump Extension Rod?
Mud pump piston rod is main accessories between drilling mud pump
power end and hydraulic end , is also one of the drilling pump
vulnerable parts. The piston rod is forged by 42CrMo.
What is the production process of HONGHUA Mud Pump Extension Rod?
The strength of the product is improved after heat treatment. The
product is processed by numerical control. The big end of the
piston rod is connected with the power end of the mud pump through
the clamp and transfer power;
The small end is equipped with a piston, which makes reciprocating
linear motion in the cylinder sleeve, generating pressure. Small
piston -- high pressure and low flow;
Large piston - low pressure and high flow. A locked-nut with an
anti-loose seal is tightened to prevent piston looseness and seal.
Clean piston and piston rod when installing piston rod to ensure no
burrs and scratches.
Install the piston seal ring into the groove of the piston core.
Attach the piston to the piston rod and take care not to let the
o-ring slip. Tighten the nut on the piston rod with the torque of
1625 ~ 2165n.m (1200 ~ 1600ft.lbs).
Smear grease on inner circle of cylinder sleeve and outer circle of
piston plug.Check the piston rod and the end of the intermediate
rod, and make sure it is clean and free of burrs.
How to insert the Mud Pump Expendables Piston Rod into the cylinder
liner?
Insert the piston rod into the cylinder liner so that the piston
rod stays in alignment behind the cylinder liner and drives the
piston into the cylinder liner with hardwood or special tools.
Note that the positioning boss at the end of the piston rod shall
not be damaged when approaching the intermediate rod, and the
piston rod shall be supported to enter the positioning hole.
Dismantle the connection clamp between piston rod and extension
rod, and crank mud pump to separate the extension rod from piston
rod. Then use the lifting tool to hold liner inside.
There is no need to remove piston core from piston rod when
replacing piston rubber. Replacing the rubber only needs to remove
the retainer (circlip) and clamping plate at the front of piston
core.
The piston rod is connected to extension rod through clamp, the
piston and piston rod are connected by piston nut.
Check if any abnormal sound exist at connection clamp between
piston rod and extension rod.
Tighten the clamp bolts or replace qualified clamp, piton rod or
extension rod if any abnormal sound occurred.
