The surface quality of the steel pipe is improved by removing the outer surface of the steel pipe with high-pressure water. With the market for hot-rolled seamless steel pipe on the outer surface of the increasingly high demand, the operating conditions of descaling water system problems are highlighted.
Improvement measures:
1) Improve the water seal between the plunger and seal. The original plunger and seal letters between the seal life is short. At least once a week, or leakage of the system pressure and flow can not meet the production requirements. The original water seal is the material for the nylon plus graphite ring seal. Sealing material is too hard, deformation is small, leaking adjustment of the packing box water seal gland has no effect. The improved water seal material for the tetrafluoroethylene + graphite material + copper ring alternate combination of ring seal. Improved water seal life of up to 2 to 4 months, during which a little water leakage to adjust the packing box water seal can be.
2) To improve the structure of the check valve to improve the one-way valve sealing. The original one-way valve for the vertical one-way valve, the direction of water flow into the high, the seal between the valve core and valve seat for the plane seal, spool positioning and orientation by the valve cover. If the spool and the valve seat between the mechanical impurities, spool and seat Seal lax, while the valve cover and the stem easily deformed, the valve cover on the spool positioning guide down, between the valve core and the valve seat seal further Down until the system does not work properly. The improved one-way valve is a tubular one-way valve, the horizontal direction of water flow activities, sealing between the valve core and the valve seat for the cone seal. The spool has a guide rod along the axial direction, the spool has a strong spring with the spool to strengthen the one-way with the role of one-way guide with the spool and guide sleeve with the orientation of guidance is not chaos good, good sealing effect.
3) To improve the suction valve, drain valve and pump the seal between the spring. The original suction valve, drain valve and the seal between the pump body profile trapezoidal shape, the material is nylon. Deformation is very small, the sealing effect is poor. Benxi high-pressure water pump factory to improve suction valve, drain valve and the seal between the rubber material to rubber O-ring. The improvement of the sealing between the suction valve, the drain valve and the pump body solves the problem that the high-pressure water of the system goes into the low-pressure inlet end, destroys the pump body and forms the hornet's nest-type cylinder block; and solves the problem that the high- Water pipes, damaged piping and components. The original suction valve, drain valve spring material improved to 1Cr18Ni9Ti, to solve the suction valve, drain valve original spring due to lack of elasticity and rupture, resulting in high pressure water fleeing into the low-pressure water really a problem. Improved system conditions are not chaotic, suction, drain valve maintenance cycle from the original uniform week increased to about a month and a half.
4) To improve the life of the plunger. The original plunger often produces longitudinal scratches. The reason is mainly because the plunger in the high-speed reciprocating motion in the stuffing box with the friction function of the seal box, the outer surface of the plunger Ni60 plated Ni thick layer of 30μm plunger plunged into the longitudinal scratches significantly reduced.
