Elevator maintenance on the wire rope test is divided into external inspection and internal inspection. External inspection refers to the observation of the surface of the wire rope corrosion, deformation and other external defects, with a vernier caliper to measure the diameter of the wire rope to reduce the degree of wear and visual inspection of the wire rope saw the number of broken lines exceeded the retirement standard. The experience of copper wire rope testing and scrapping in use shows that internal damage to the wire rope is mainly due to corrosion and normal fatigue, which is the primary cause of many wire rope failures. The usual external test can not find the extent of internal damage, even to the point of danger of approaching the fault, so the internal inspection of the wire rope is necessary.
1, how is the elevator running up?
The elevator has a car and a counterweight, which is connected by wire ropes. The rope is driven by the traction of the drive (hoisting machine), causing the elevator car and the weight to be moved up and down on the inner rail of the elevator.
2, the elevator rope will be broken?
The rope for the elevator is dedicated to the elevator, and the country has special regulations and requirements. The configuration of the wire rope is not only to bear the elevator car and the rated load, but also take into account the size of the traction, so the tensile strength of the rope is much greater than the elevator load, their safety factor is above 12, usually the elevator are With more than four wire rope, under normal circumstances the elevator wire rope is not broken at the same time. The safety factor of the elevator is very high if the wire rope broken, then the elevator will be disabled, to be replaced after the wire rope and then put into use.
3, the elevator running a sudden power outage is dangerous?
Elevator running in the event of a sudden power failure or power supply lines failure, the elevator will automatically stop running, there will be no danger. Because the elevator itself is equipped with electrical and mechanical safety devices, once the power failure, the elevator brake will automatically brake, so that the elevator can not run. In addition, the power supply department if a planned power outage, prior notice, the elevator or stop the operation in advance. When the elevator power failure, the lower part of the car safety gear, it will be caught in the rail, the car is fixed on the rail above, will not fall. Some elevator control cabinet inside the emergency power supply, when the sudden power failure, the emergency power inside the car enough to the car to the nearest floor, open the door for passengers to safety out.
The overall design of the lifting equipment does not allow the wire rope to have an infinite service life. Strictly speaking, the rope from the put into use, its performance began to decrease. Wire rope during use, must be carried out in accordance with the provisions of regular inspection, through the real-time monitoring of wire rope, for the safe and effective use of wire rope to provide the basis. In general, the inspection of the wire rope is divided into external inspection and internal inspection. External inspection refers to the observation of the surface of the wire rope corrosion, deformation and other external defects, with a vernier caliper to measure the diameter of the wire rope to reduce the degree of wear and visual inspection of the wire rope saw the number of broken lines exceeded the retirement standard.
The mechanical part of the elevator is relatively stable quality, but some of the useful life is too long, serious mechanical wear or institutional design in the existence of congenital problems, such as the old-style domestic elevator door institutions, with various conditions change and the emergence of various Different failures, seriously affecting the use. On the basis of the original on the elevator for local or a wide range of transformation, to achieve safe and reliable use, reduce the failure rate and the transformation of the elevator to reach the current level of technology.