10 Ton Electric Overhead Crane

10 Ton Electric Overhead Crane

Single beam crane is a common handling tool in enterprise production, and belongs to special equipment. So there is nothing to lose on security protection. Generally, the overloading limiter, upper and lower limit and stroke switch are essential for single beam crane. Below is a brief introduction to the role and importance of these three kinds of protection devices.

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10 ton electric overhead crane

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Single girder crane three kinds of safety protection device (2016-05-23 10:07:59) introduced important reprint print

Label: Crane classification for single beam crane: Crane knowledge

Single beam crane is a common handling tool in enterprise production, and belongs to special equipment. So there is nothing to lose on security protection. Generally, the overloading limiter, upper and lower limit and stroke switch are essential for single beam crane. Below is a brief introduction to the role and importance of these three kinds of protection devices.

A limiter for overload limiter to prevent overloading, usually by a wire rope. When the lifting weight reaches 90% of the rated lifting weight, it sends out the intermittent alarm sound, the green sound indicator is bright, and the weight of the weight is displayed. When the lifting weight and the rated weight are the same, the intermittent alarm is sent out again, the yellow indicator light is on, and the weight of the heavy goods is displayed. When the lifting weight exceeds the rated lifting weight, Again a continuous alarm sound, the red indicator light, and the delay 2 seconds automatically cut off the crane rising contactor power. At this time, the single beam crane will not be able to carry out the lifting work.

The function of the upper and lower limits is to control the safe position of the hoisting hook, and to prevent the safety accidents of the hoisting hook and so on. When the hoist of a single beam crane rises or falls, the guide rope will run with blocks. When running up to the limit, the block will disconnect the two groups of normal closed points of the upper limit loop, and the motor can't rise after power failure, so as to prevent the punching top. But the two sets of closed points in the descent loop are no action or closed, so it can run down. General electric hoist of the upper and lower limit two ways, one is the limit switch (cam or split), the switch connection and common control circuit; there is a broken firearm more common, it is not disconnect contactor control circuit, power supply directly off electric hoist.

The trip switch, also called the collision avoidance device, makes use of the collision of the moving parts of the production machinery to make the contact action to connect or break the control circuit, so as to achieve certain control purposes. Usually, this kind of switch is used to restrict the position or the stroke of the mechanical movement, so that the moving machine can automatically stop, reverse motion, variable speed movement or automatic round-trip motion according to a certain position or stroke.

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