Position compensation extendable-and-retractable type boarding trestle hydraulic system

Abstract

The invention discloses a position compensation extendable-and-retractable type boarding trestle hydraulic system. The position compensation extendable-and-retractable type boarding trestle hydraulicsystem comprises a power system, a rotation hydraulic system, an extending-and-retracting hydraulic system and variable amplitude hydraulic systems. The power system comprises a hydraulic oil tank, main pump sets and a high-low pressure pump set. The rotation hydraulic system comprises a rotation selection valve, a direction and speed control valve, a brake control valve, a mode selection valve, afirst balance valve, a second balance valve, a two-way direction valve, a sequence valve, a hydraulic motor and brakes. The extending-and-retracting hydraulic system comprises an extending-and-retracting selection valve, a direction and speed control valve, a brake control valve, a mode selection valve, a first balance valve, a second balance valve, a two-way direction valve, a sequence valve, ahydraulic motor and an extending-and-retracting brake. Each variable amplitude hydraulic system comprises a variable amplitude selection valve, a variable amplitude direction and speed control valve,a variable amplitude energy accumulator control valve, a variable amplitude energy accumulator switch valve, a variable amplitude energy accumulator oil charging control valve, a plunger type energy accumulator and a variable amplitude oil cylinder. By means of the system, manual overlapping, active compensation and servo compensation can be achieved, and footbridges can be overlapped reliably andsafely.

Description

Technical field [0001] The invention relates to hydraulic systems. Background technique [0002] The bridge or trestle bridge is mainly used to transport people or goods. On land, the construction of the bridge is relatively simple, but the bridge used to transport people and materials between two ships at sea is relatively difficult to construct. Because the ship moves with each other, the bridge is generally built on a ship. If it needs to be used, a bridge is set between the two ships by overlapping. In the lap process, in order to achieve better overlap, the relative position between the bridge and another ship needs to be considered, otherwise the bridge and the ship will collide due to the floating of the ship; after the overlap is completed, It is also necessary to consider the relative position between the two ships. According to the relative position of the two ships, let the bridge be in a passive compensation state, so that normal use can be ensured; in addition, in a...

AI Technical Summary

Problems solved by technology

The structure adjusts the position of the platform through active wave compensation, and then realizes the lap joint. However, since the ship is shaking, it is difficult to ensure the position between the gangway and the ship during the lap joint process. The lap joint is very difficult. After the lap joint, if If the gangway cannot be followed, it is easy to damage the structure, and it is impossible to pass people and transport materials smoothly

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