Equipment repair for smoothing equipment commonly used in rolling mills

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Equipment repair for smoothing equipment commonly used in rolling mills

Source: Bearing network time: 2014-06-12
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(1) Equipment of the equipment: carefully check the piping drawings of the smooth equipment, smooth equipment and mechanical equipment, view the foundation drawing; recognize the connection and the equipment connection is correct; carry out the equipment. Check the equipment and components before the equipment, the product must be qualified. Certificates; necessary equipment and components to be cleared; then pre-equipment (for more messy systems). After pre-equipment; clear pipes, view components and connectors; if lost, damaged; should be disposed of in a timely manner.
Removal method: degreasing with carbon tetrachloride, or degreasing with sodium hydroxide; remove with warm water. Reuse hydrochloric acid (mass fraction) 10-15%; urotropine (mass fraction) 1%, impregnation or removal 20- 30min, solution temperature is 40-50 ° C; then with warm water to remove. Reuse 1% ammonia solution; immersion and removal 10-15min; solution temperature 30-40 ° C after neutralization; with steam or warm water to remove. Finally Dry with hygienic dry air; apply anti-rust oil; be used in official equipment.
(2) Equipment removal, pressure test, commissioning: After the equipment is officially installed; it is better to clear the cycle once again; to ensure reliable. The dry oil and thin oil system cycle time is 8-12 hours; the thin oil pressure is 5-3MPa, The degree of hygiene can reach NAS11 and 12 levels.
For the system after the removal; the pressure should be maintained for 10-15min with additional pressure. Gradually boost; timely investigate and dispose of the problem. After the experiment; read the pressure relay, temperature conditioning, liquid level conditioning and electrical interlock according to the instructions. Then you can put it into use.
(3) Equipment repair: on-site operators; must try to know the equipment, equipment, component drawings; instructions and operating principles and other materials; technically grasp the use and protection of related materials; in order to apply protection and repair.
(4) Common incidents and disposals of thin oil stations and dry oil stations:
a. Thin oil pump bearing heating (slider pump): The reason is that the bearing clearance is too small, the lack of smooth oil; view the gap; from the beginning of the study; the gap adjustment 0. 06-0. 08mm,
b. Sudden increase in pressure at the station: the pipeline is blocked; check the pipeline; remove the obstruction.
c. Thin oil pump heat: the gap of the pump is not proper; adjust the gap of the pump, the viscosity of the oil is too large; reasonably select the oil, the pressure is not properly adjusted; exceed the actual pressure required; reasonably adjust the various pressures in the system, the leakage of the joints of the oil pump Formed; lost volume and heat; tighten the joints; and check the seal; avoid leakage.
d. Pressure operated valve push rod measures when the pressure is very low: the check valve is not normal; check the spring and steel ball; and carry out the repair or replacement.
e. The pressure gauge of the dry oil station can't hold the pressure: the safety valve is broken; the oil supply piston is poorly cooperating; the reversing valve plunger cooperation is not strict; the oil pump plunger gap is too large; the safety valve is repaired; the bad oil feeder is replaced; Air inside the tube, replace the plunger; research the plunger clearance.
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Socket Weld Flanges

Socket-Weld Flanges has a female socket in which pipe is fitted. Fillet welding is done from outside on the pipe. The socket welding flange is similar to a slip-on flange except it has a bore and a counterbore dimension.

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