Protective casing lifting equipment

Abstract

The invention provides protective casing lifting equipment which comprises a clamping assembly, a remote control assembly and a power assembly for providing power. The clamping assembly comprises a head end clamping block, a tail end clamping block and at least one middle clamping block, the head end clamping block, the middle clamping block and the tail end clamping block are of arc block-shaped structures and are respectively provided with a vertical lifting oil cylinder, and the head end clamping block, the middle clamping block and the tail end clamping block are sequentially hinged to form a cylinder-shaped structure. The head end clamping block and the tail end clamping block are respectively provided with an enclasping arm, the enclasping arms extend towards the outsides of each other and are staggered, and a horizontally-arranged enclasping oil cylinder is hinged between the two enclasping arms. The protective casing lifting equipment can effectively liberate a rotary drilling rig from the construction link of lifting a protective casing, and greatly accelerate the overall process of construction projects. In addition, the enclasping arms are staggered and arranged in a scissor shape, the maximum jacking force of the enclasping oil cylinder can be fully converted into enclasping force of the clamping assembly, and the enclasping oil cylinder can play the greatest role.

Description

technical field [0001] The invention relates to the field of engineering machinery, in particular to a casing lifting device. Background technique [0002] With the rapid development of rotary drilling rigs in my country's piling industry, full casing construction, a new safe and environmentally friendly piling method, has also been vigorously developed. Therefore, the construction equipment matched with the full casing construction has also been rapidly popularized and applied. At present, among the complete casing construction equipment, the equipment for lowering and pulling out the casing by the rotary drilling rig mainly includes the rotary drilling driving fountain, the rotary drilling pipe rubbing machine, and the rotary drilling rig. Among these types of equipment, the rotary drilling rig is complex and expensive (tens of millions); the driving fountain and the tube rubbing machine generally require the cooperation of a rotary drilling rig to construct, that is to s...

AI Technical Summary

Problems solved by technology

[0004] 1. The layout of the hydraulic cylinder and the clamping mechanism is unreasonable. The clamping force obtained by holding the cylinder tightly depends on the pulling force of the cylinder. Not only is the clamping force small, but this layout is also a waste of the maximum force that the cylinder can provide. Make the best use of the oil cylinder;

[0005] 2. The pulling diameter is not variable, the application range is small, and the casing with larger diameter cannot be pulled effectively;

[0006] 3. Most of the control methods are manual control, the control method is backward, the work efficiency is low, and the operation is complicated and cumbersome; the distance between the operator and the equipment is relatively short, and the risk factor is high

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