Grabbing beam fall prevention locking device and locking method

Abstract

The invention discloses a grabbing beam fall prevention locking device and a locking method. The grabbing beam fall prevention locking device comprises a limiting frame, a fixed frame, a rolling mechanism, a bearing pedestal, a limiting mechanism and a locking mechanism, wherein the bearing pedestal is connected with the limiting frame and the fixed frame; the rolling mechanism passes through thelimiting frame and the fixed frame and is cooperated with the bearing pedestal in a rolling manner; the limiting mechanism is connected with the limiting frame in an inserting manner and is cooperated with the rolling mechanism and the locking mechanism; the locking mechanism vertically slides along the limiting frame in a cooperative manner; and the rolling of the rolling mechanism is limited through the cooperation of the limiting mechanism and the locking mechanism. The grabbing beam fall prevention locking device overcomes the problem that a potential safety hazard is existed because a lifting hook is easily unhooked in the lifting and descending process of an original grabbing beam, is simple in structure, locks the rolling mechanism when lifting the door, locks the rolling mechanismin descending door earlier stage, unlocks the rolling mechanism when a gate is descended to a bottom sill, and then unlocks the lifting hook of the grabbing beam to avoid the accidental release of the lifting hook, and has the characteristics of being safe and reliable, and simple and convenience in operation.

Description

technical field [0001] The invention belongs to the technical field of hydraulic engineering gate lifting, and relates to a locking device and a locking method for preventing falling of a grasping beam. Background technique [0002] The mobile hoist of a hydropower station is used to lift multi-port gates or trash racks. In order to avoid frequent assembly and disassembly of booms, it is generally equipped with automatic grab beams. The heavy hammer hook type grabbing beam is a kind of mechanical automatic grabbing beam that is often used on small gates or trash racks. ) grab off. [0003] Before the door is lifted, the grabbing beam is separated from the gate. At this time, on the dam surface, manually move the weight to the right to make the hook vertical. When the automatic grabbing beam is lowered to touch the pin on the gate, The arc surface of the outer edge of the hook slides over the pin shaft of the lifting lug of the gate, the hook tilts and continues to fall to ...

AI Technical Summary

Problems solved by technology

If the gate is stuck in the door slot, the hook will come out by itself. At this time, the gate is in an unstable state and may continue to descend and fall into the door slot, causing an accident.

In response to this situation, at present, the program is set in the electrical circuit, and the lower door is stopped immediately when the output signal of the load sensor is zero, but it may be uncoupled when the load is zero, and due to the inertia of the lifting mechanism , the grab beam may continue to slide for a short distance, so electrical control is not reliable

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