Container spreader

Container spreader refers to a special spreader for loading and unloading containers. It is connected with the top corner fittings of the container through the screw lock at the four corners of the end beam. The driver operates and controls the opening and closing of the screw lock to carry out container loading and unloading operations.

Components

1. Rotary lock device

The floating rotary lock can swing in the rotary box to adapt to the manufacturing error and working deformation of the container.

2. Guide device

The guide device plays a positioning role when the spreader approaches the container. It is commonly used as a guide plate. The end is made of steel plate, which can rotate 180 ° up and down, and can be turned up when it is not working.

3. Suspension and tilting device

When the container ship has trim or heeling, it is required that the spreader can also be ± 5 in the front, rear, left and right directions. Tilt of. This is generally achieved through the expansion and contraction of the hydraulic cylinder or the retraction and retraction of the drum wire rope.

4. Control device

The control device includes the rotary lock drive device, the guide plate drive device, the spreader fore-and-aft tilt device and the spreader telescopic device, all of which adopt hydraulic transmission.

5. Control device

The four corner fittings of the spreader are equipped with indicator lights. Only when the four corner fittings are screwed together at the same time, the indicator lights are all on, and then the container can be lifted.

Transportation mode

According to the different connection methods between container spreader and loading and unloading machinery, that is, according to the different lifting methods, the lifting methods of container spreader mainly include:

1. Four lifting points lifting

Four lifting points lifting method there are four lifting points when lifting the container. The lifting appliance connects the container from the four lifting points and winds it on the lifting drum of the lifting mechanism of the loading and unloading machinery through the wire rope pulley system on the lifting appliance.

Special container handling machinery, such as quayside container cranes (container loading and unloading bridges), container straddle trucks, container gantry cranes, etc., all use this kind of container lifting appliances.

2. Single lifting point lifting

When using portal crane or ship suspender to lift containers, there is only one lifting point of the spreader. After the sling is lifted with four ropes and concentrated on one point of the hook, the connection between the sling and the corner pieces of the container can be operated by electric, electro-hydraulic or manual methods.

Slings used to lift containers with shackles, wire ropes and hooks are called riggings. The structure of simple container spreader is mainly composed of spreader frame and manual rotary lock mechanism. They all belong to single lifting point slings.