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Measures to Maintain Accuracy of Crane Rail Installation


Measures to Maintain Accuracy of Crane Rail Installation
The cleanliness installation of the bridge crane rail is an important factor to ensure its safe operation. However, its solid reliability is an important condition that cannot be ignored. When the overhead crane brakes, a longitudinal thrust is generated. If the car brakes, a lateral thrust is generated. If the large and small cars are braking at the same time, a combined braking force is generated to subject the track to an oblique thrust. If the crane rail square steel is installed with one side generally higher than the other side, the overhead crane will move to the lower side as a whole, which will increase the lateral force that the crane rail square steel is subjected to. Thereby, the rail pressing plate is loosened and detached under the action of the above-mentioned forces, and the crane rail square steel is displaced accordingly, causing the bridge crane to run the ramp, the cart is twisted, shaken, unable to stabilize the hook, and is prone to collision and accident. In particular, open-air bridge cranes, in order to prevent wind blowing and tipping, in the non-working state, the rail clamp is on the clamping rail, so the solid reliability of the track laying is particularly important. In addition to the rigid reliability of the crane rail square steel installation, it must be considered for easy replacement. Especially in continuous production sites, this cannot be ignored. For this reason, most of the permanent connection methods such as welding are not used. At present, the crane rail square steel connection generally include plate fixing method and hook bolt fixing method, etc. When the bridge crane is caused by some mechanical or electrical reasons (such as the accuracy of the installation of the wheel, the error of the diagonal, the adjustment of the brake and the asynchronous motor, etc.), rail gnawing will be caused, which is bound to cause large wheel edge to generate a lateral thrust to the crane square steel. This force is transmitted from the rail to the pressure plate (the distance between the pressure plate needs to be adjusted, so the bolt hole is made into a long hole). Even if the pressure plate is installed, the wooden wedge or square pad spot welding is added, and the large-tonnage bridge crane track is difficult to ensure that displacement will not happen, because the platen fixing method has only vertical pressure and no lateral force, the lateral displacement of the track is unavoidable.
After years of use on the crane rail square steel, the repair experience proves that the above two joint methods are combined, that is, two pairs of platen joint methods, and a pair of hook bolt fixing methods are effective. This not only exerts the advantage of large vertical pressure of the pressure plate connection, but also ensures that the bottom plate of the rail is not easy to be stringed out, the elevation is constant, and the advantage of the lateral force of the hook bolt fixing method is fully utilized to ensure that the track does not produce side bends. This type of structure ensures that the installation accuracy of the track is not easily changed, and the reliability of the track connection is ensured. It is also not necessary to adjust the track elevation frequently, and the side plate bends the clamping plate nut, thereby improving the utilization of the bridge crane and ensuring its safe and reliable operation.

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