What if the crane doesn't work? How to solve the problem of tower crane operation failure?
In the operation of the tower crane should always pay attention to the operation status of the tower crane, in order to ensure the safe work of the tower crane so as to improve the efficiency of the work. If problems are found, it will be late to prevent them, especially in large-scale engineering operations. It is likely to cause major tower crane accidents. So tower drivers have to be extra careful at work. How to solve the operation failure of the safety protection device when overloading or overloading.
Electrical system or hydraulic system failure, can cause tower crane operation failure. Below, to the circuit, the liquid road inspection work, do the following analysis.
1, Circuit detection
The purpose of circuit detection is to check whether the power moment limiter and the limit switch can also transmit the electrical signal to the discharge solenoid valve while providing the panel indicator signal. If so, the discharge loop will be connected to achieve safe unloading. Otherwise, Safety discharge will fail.
2, check the liquid road
After checking the circuit, check the liquid road. First, check the cloth pipe. There was no error. Finally, the attention was focused on the logical valve. It was suspected that the spring of the one-way valve in the logic valve was harder or the diameter in the valve was smaller, making the discharge oil. Road back pressure is larger, Cause unloading oil road is not smooth, unloading is difficult. Therefore, in the state of alarm, the pressure of an or BN corresponding to the action was measured and the pressure was found to be about 1 MPa. The main valve only needed about 0.6 MPa of pilot pressure to open. This proves that the suspicion is correct. It is precisely because the back pressure in the logic valve is large. To make it difficult to unload.
Problems noted in daily inspection, maintenance and use of steel wire rope for tower lifting
The strength of the wire rope must be regularly checked during use. Generally, a full inspection or strength test must be performed at least six months.
Second, steel wire ropes are strictly forbidden to be overloaded during use, and should not be subjected to impact. When tying or lifting requirements, care must be taken not to make the wire ropes directly in contact with the sharp corners of the fast mouth of the object, and they should be laid at their contact points. Canvas, Sacks, or other linings to prevent damage to the wire rope by the sharp corners of the object, resulting in equipment and life accidents.
Third, during the use of wire ropes, if the length is not enough, the buckle connection must be used, and it is strictly forbidden to use the wire rope head to wear the fine wire rope method to connect the long hanging objects, so as to avoid the resulting shear force.
Fourth, the edge of the roller used for wire rope wear shall not be broken or cut.
Fifth, during the use of steel wire rope, especially steel wire rope in the movement should not be rubbed with other objects, and should not be dragged diagonally with the edge of the steel edge, so as not to cut the steel wire rope, directly affect the service life of steel wire rope.
When using a wire rope on a high-temperature object, insulation measures must be used because the wire rope will be greatly reduced in strength after being subjected to high temperature.
After the wire rope is used for a period of time, it must be lubricated. On the one hand, it can prevent the wire rope from rusting. On the other hand, the wire rope is used during the use process. Sliding friction occurs between the steel wire and the steel wire in the same strand of its sub-rope per share, especially when the wire rope is subjected to bending force. This friction is more stimulated and can be reduced by adding lubricant.
When the wire rope is stored, the dirt on the wire rope must be washed and lubricated according to the above method, and then wound and stored in a dry place. Under the wire rope, wooden plates or sleepers must be used. Periodic inspection.
During the use of wire ropes, particular attention is paid to preventing the wire rope from contacting the wire. Due to the impact of electricity, the wire rope will be damaged, affecting the smooth operation.
During the use of wire ropes, constant care must be taken to check for breakage and use, or to replace new ropes to ensure safety.
