Beyond Petroleum Equipment

29

2021

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01

Disassembly and assembly of vulnerable parts of horizontal directional drilling mud pump

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The horizontal directional drilling mud pump consists of a power system, drilling rig system, directional control system, drilling tools, mud system, and auxiliary equipment.

The horizontal directional drilling mud pump consists of a power system, drilling rig system, directional control system, drilling tools, mud system, and auxiliary equipment. At present, this type of machine is used in many projects and can be widely used. The horizontal directional drilling mud pump can be completely disassembled or partially disassembled, that is, completely disassembled during major repairs, and partially disassembled during major repairs or troubleshooting. The following article will introduce the disassembly and assembly of its vulnerable parts.
Disassembly of vulnerable parts of horizontal directional drilling mud pump:
Piston: First remove the cylinder head pressure plate nut, loosen the inner pull rod nut and thin nut of the cylinder liner, and then use a piston disassembly tool to remove the piston.
Cylinder liner: First remove the pump head, remove the piston, and fork the special tool top plate between the pull rod and the cylinder liner. Rotate the pump and push out the cylinder liner with a pull rod.
Valve seat: First remove the valve cover, and then use a valve seat disassembly tool to remove the valve seat.
Pull rod sealing ring: After removing the cylinder liner, loosen the connection between the pull rod and the crosshead, remove the pull rod, and then open the gland on the pull rod sealing ring to replace it.
Safety valve: Open the upper cover, loosen the adjustment screw, remove the valve cover, and replace the spring.
Unloading valve: First remove the handle rod, then loosen the flat nut, round nut, and sealing ring nut, then replace the V-shaped sealing ring, sealing ring seat, valve stem and valve, loosen the connecting bolts under the valve body, and replace the valve seat.
Assembly of vulnerable parts of horizontal directional drilling mud pump:
The crankshaft bearing gland can only be correctly seated and cannot be interchanged. The tightening torque of the bolts and nuts is 120~140Nm; The tightening torque of the connecting rod screw is 80-100Nm, and it is stopped with a locking washer; All connecting bolts and nuts should be tightened without looseness; When assembling the inlet and outlet valve seats, special attention should be paid to ensuring that there are no inclusions between the valve seat hole and the mating surface of the valve seat. The valve seat should not loosen after being firmly installed.

 

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