Rail hook device for floating dock portal crane

Abstract

The invention relates to a rail hook device for a floating dock portal crane, which is arranged on the bottom of a compensating beam of a walking mechanism along a rail. The device comprises a pulling plate, a yoke plate and at least a pair of hook plates, wherein the pulling plate is in rigid connection with the bottom of the walking mechanism; the yoke plate is hinged on the bottom of the pulling plate, and is provided with a plurality of travelling wheels rolling along the rail on the bottom of the yoke plate; the pair of the hook plates are symmetrically arranged on two sides of the yoke plate along the rail; the plane direction of the hook plate is vertical to the length direction of the rail; the hook plates are respectively hooked with rail jaws on two sides of the rail; at least one side of each hook plate is provided with two hinge lugs; and the hinge lug is hinged with a horizontal guide wheel which rolls along the side surface of the rail. The lower part of the hook rail device is arranged on the rail through the travelling wheels; an upper pulling point has a vertical floating structure, and can adapt to errors on the rail height direction, namely the vertical direction, such as unevenness, deflexion and the like. The rail hook device can effectively adapt to the errors on the rail horizontal direction by adopting guidance of the horizontal guide wheels. The front pulling point has a left right floating structure.

Description

technical field [0001] The invention relates to the field of wharf lifting, in particular to a hook rail device for safety protection of a floating dock portal crane. Background technique [0002] With the recovery of the global shipbuilding industry, the demand for floating dock portal cranes for shipbuilding and ship repairing industry is also increasing. Due to the limitation of the hull size of the floating dock, the gauge of the portal crane installed on the floating dock is much smaller than the base distance, and the gauge value is small, usually only 3 to 5 meters, so the dangerous overturning line of the crane is one side The track, that is, the anti-overturning stability of the crane perpendicular to the track direction is poor. Similar to port cranes, the non-working windproof and anti-typhoon safety facilities of floating dock cranes include devices such as windproof cables and cart anchors, and their non-working safety protection measures are sufficient and rel...

AI Technical Summary

Problems solved by technology

Once the hook rail device of this structure is installed in place, the height position (ie vertical position) of the hook plate 34 cannot be adjusted.

In the design and manufacture, if the track 35 crossing hole on the hook plate 34 is opened larger, that is, the upper and lower gap between the hook plate 34 and the track 35 is too large, when an accident occurs, the time for the hook plate 34 to lift and hook the track 35 Delay, the kinetic energy of the overturning of the crane that needs to be overcome increases, and the size of the corresponding hook rail device required is relatively large; at the same time, due to the delay in the time when the hook plate 34 hooks the track 35, the tread of the traveling wheel of the cart and even the wheel rim may have off track 35

When the accidental factor causing the crane to overturn is eliminated, when the traveling mechanism resets and falls off the rails, the wheel rim may fall on the tread of the track 35, which is extremely unsafe.

Conversely, if the track 35 crossing hole on the hook plate 34 is opened smaller, that is, the upper and lower gap between the hook plate 34 and the track 35 is too small, because the track 35 is uneven, the hook plate 34 may be on the same track when the crane cart is running. 35 contacts

In addition, the horizontal position of the hook plate 34 can be slid and adjusted axially along the pin shaft 32, but this adjustment is realized by rubbing and pushing with the rail 35, which is sliding friction, the friction force is large, and the reliability is poor.

Therefore, during the reciprocating movement of the cart, the hook plate 34 is in constant contact with the track 35 vertically and horizontally and relatively moves, causing more sliding friction and noise between the hook rail device and the track 35, making the hook rail device safe and reliable. greatly reduced sex

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