Tower crane torque limiter will fail, how to avoid?

First of all we want to know, what is the role of tower crane torque limiter: torque limiter in weight overload or working radius beyond, beyond the technical performance of the tower crane at the moment, immediately cut off their own lifting or variable power source, also issued a warning signal, accident prevention. You see, the accessories function is not very important?! Related to the equipment and personal safety?! So how terrible is it if the tower crane torque limiter fails?

Today, in order to improve the safety of the moment limiter of tower crane, this paper sums up some specific measures to avoid the failure of the moment limiter of tower crane.

1. Improvement of movable stroke switch

The main function of the movable stroke switch is to control its stroke and limit the terminal protection. The movable stroke switch is transformed into a combination switch with high sensitivity and accuracy, that is, combination warning switch and combined cut off switch. The structure is divided into single arm type operation with roller, automatic reset operation; fork arms with roller, with 2 conversion position; worm gear drive cam is operated by Trident shaped arm operation 3 conversion position; with roller arms 2 position conversion operation. The improved dynamic stroke switch adds the control bottom line of the torque limiter, that is, when the abnormal condition occurs. The control element of the torque limiter must touch the control bottom line first. Immediately alarm, disconnect the lifting power, only allowed to drop.

2. transportation, disassembly and protection

The transportation, disassembly and assembly process of the torque limiter, like many special equipment, requires that the person, the machine and the duty be set up, and the personnel must be relatively fixed even if there are fewer personnel. In the demolition marked dismantled gently, proper protection, do not squeeze each other, so as to avoid collision damage. When the equipment is removed, the crane operator or professional electrician must properly handle the display instrument, connecting cable, force taking device parts and sensors. The best installation should be restored in the original order and position, and then debugging and calibration. The tower crane generally has a lot of working curve, such as the main arm and an auxiliary arm working condition, and the side arm condition has three long arms, and three conditions, as long as the boom length, weight ratio, the hook has a parameter change, so as to adapt to the call limiter with the curve. Therefore, because components of the moment limiter after long-term use will cause wear or other affected by the natural environment, to display the weight error, so every time (period is generally 3 to 6 months) to periodically check the accuracy of the system, the deviation exceeds the national standard range to re adjust the weight and calibration, and the relevant documentation for reference, reasonable use and maintenance of this is particularly important.

3. the wire is fixed, and the electric wire is provided with multilayer protective sleeve

The torque limiter limit switch has poor waterproof performance and often acts wrongly. The tower crane driver is afraid of replacing the trouble, and the electric circuit is dismantled without permission. The moment limiter loses the safety protection function. The electric wire can be fixed, and the electric wire is provided with a multi-layer protective sleeve, which can effectively prevent the torque limiter from losing efficacy, and the lifting moment limiter can be closed or locked, so as to protect the moment limiter of the tower crane.

I hope this article can let you learn some knowledge, so that your work more secure.

Related recommendation:

31 swordsman two mobile phone market "double eleven" auction over ten million

The first auction of Jiangsu 31: 25 second-hand pumps are all taken out

Mountain reconstruction machine two mobile auction storm struck again