The function and working principle of attachment height limiter for single beam crane

[BONOVO]

The travel switch is combined with the convex and concave stay structure, the structure design is simple, the action is sensitive, effectively by restraining the occurrence of major personal injury accidents, to ensure the safety management and production of construction engineering construction enterprises. When the lifting device can be placed on the ground or below the top surface of the track, the lowering distance is called the descent depth. That is, the vertical distance between the lower working position of the spreader and the horizontal supporting surface of the crane. The intelligent crane is a multi-action lifting machine that lifts vertically and carries heavy objects horizontally within a certain range.

The work is characterized by intermittent movement, that is, the corresponding mechanism of taking material, migration, unloading and other actions in the more work cycle is alternately working, and the development and use of cranes in the market is more and more extensive. For the boom type crane, its rated lifting weight changes with the amplitude, and its lifting characteristics are characterized by lifting torque. The value indicated on the sign is the larger lifting weight. After several years of use, the effect is remarkable.

Structure and installation: The travel switch is bolted in the thin steel plate semi-closed protective box. The bottom of the protective box is welded with two guide rails, and the convex and concave tie rods can move around the guide rails in the guide rails. Drill a small hole in the lower end of the male and female rope to fix the fine wire rope or nylon rope. Thin wire rope Veneron rope is used to set the height limit.

Lift height limiter can be installed next to the winch or in the distribution cabinet. When installing, the better end of the fine wire rope or nylon rope is firmly fixed in the hole at the end of the artificial convex and concave tie rod, and the other end is fixed on the top of the suspension cage. The trip switch leads are connected to the AC contactors in the power distribution cabinet.

The working principle of the single beam crane: when the construction elevator lifting cage runs upward, the small roller on the travel switch is in the power position of the concave point of the convex and concave stay. When the elevator has a mechanical failure or the operator misoperates, the lifting cage always rises to the limit height, that is, the height set by the lifting height limiter.

As the lifting cage beam pulls the fine wire rope and the convex and concave bracing, at the same time, the small roller on the travel switch moves upward to the convex part of the bracing bar under the action of external force, the small roller moves from the mouth power position to the convex point, so that the travel switch is powered off, the upward power is cut off, the lifting motor stops running, and the lifting cage stops running. Manually lift the convex and concave brace of the height limiter to reset the small roller on the travel switch from the convex point to the concave point, and then start the car.

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