Vertical lifting steel plate pliers is a sling type steel plate pliers series products, mainly used for lifting and handling steel plates and steel pipes that need to be placed upright. It has the advantages of simple structure, flexible use and easy maintenance, and can improve work efficiency and reduce labor intensity. Due to these advantages, in recent years, its varieties and specifications have developed rapidly, and new products such as long-distance wire pull control and electromagnetic control have come out one after another, playing an outstanding role in the construction operations of profile loading and unloading, equipment maintenance and static pressure steel pipe piles in industrial and mining, chemical, shipbuilding and construction industries.

　　Structure, working principle and main parameters of vertical lifting steel plate pliers

　　The principle of cam-lever clamping is generally adopted for vertical lifting steel plate tongs. Through the lifting ring 8 and the connecting arm (the lifting ring and the lifting ring shaft can move up and down along the shaft groove of both sides of the plate together), the clamping plate 3 is rotated under the action of the lifting object's own weight. Plus a stable self-locking device with working handle 12. The clamp body adopts welding structure, and the wearing parts can be easily removed and replaced. There are two positions of the working handle. When the working handle is rotated to the position, under the action of the stabilizing spring force of the self-locking device, the steel plate hoist can obtain the torque of the steering clamping, generate an auxiliary pre-clamping force, and clamp the plate within the specified thickness range. The principle of cam-lever forcing-increase is used in lifting. Under the action of gravity of lifting object, the clamping force N is amplified by connecting arm and clamping plate forcing-increase mechanism. To remove the lift from the pliers body, turn the handle to position. At this time, the clamp plate is in a large opening position, and the stabilizing self-locking device is locked in place, so that the clamp body can fall off from the lifting object smoothly.

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