Elevator dragging method and equipment

Abstract

The elevator dragging device comprises a lifting cage, a balance weight, a guide mechanism for the lifting cage and the balance weight to move up and down, a traction machine, a first guide wheel set and a second guide wheel set, the upper end of the balance weight is provided with an upper wheel set, and the lower end of the balance weight is provided with a lower wheel set; one end of the first traction cable is relatively fixed with the cage and is connected with the first coded disc, and the other end of the first traction cable upwards bypasses the first guide wheel group and then is downwards connected with the counterweight; and one end of the second traction cable is relatively fixed with the lower part of the hoistway and is connected with the second coded disc, and the other end of the second traction cable is wound on the traction machine after upwards bypassing the lower wheel set, then upwards wound on the second guide wheel set, downwards wound on the upper wheel set and finally upwards fixed with the hoistway sky beam through a rope head combination. The length of the traction cable and the length of the guide mechanism can be continuously adjusted through the coded disc to meet the height change of a building. And through an indirect driving mode, the cycle frequency and number of the traction cable are reduced, reactive power loss caused by the quality of a traction cable system is reduced, and the operation efficiency is improved.

Description

technical field [0001] The invention relates to construction equipment for construction projects, in particular to equipment for construction elevators in wells, and in particular to methods and equipment for dragging elevators. Background technique [0002] At present, construction elevators are generally located outside the building, relying on standard section guidance and the up and down operation of the cage that supports people or goods. The outdoor elevator is greatly affected by the weather, and is generally directly driven by hoisting wire ropes or gear racks. They are basically rack and pinion construction lifts (SC type construction lifts), which have high energy consumption and high operating noise. Because the standard section and the building body are often softly connected, in strong winds and thunderstorms and large lifting heights, the standard The increase of the section guide deviation reduces the safety and reliability of the elevator; it is prone to risk...

AI Technical Summary

Problems solved by technology

[0002] At present, construction elevators are generally located outside buildings, relying on standard joints to guide and support people or goods to move up and down. The outdoor elevator is greatly affected by the weather, and is generally directly driven by hoisting wire rope or rack and pinion. The current domestic use Basically, they are rack and pinion construction elevators (SC type construction elevators). The elevator has high energy consumption and high operating noise. Since the standard section and the building body are often connected softly, the standard The increase in the guide deviation of the joints reduces the safety and reliability of the elevator; it is prone to risks such as instability and tipping, and the hanging cage falls to the top; the entire equipment is outdoors, and the requirements for the surface protection of the equipment itself are also high

[0003] There is also a kind of construction hoist located in the elevator shaft of the building, which adopts the traction transmission of the traction machine installed under the way, the rope winding ratio is 1:1, and the traction machine is a three-phase asynchronous geared traction machine. The efficiency of the traction machine is low, and the energy consumption is high; since the brake is located between the motor and the gearbox, the braking performance of the traction machine is also weak, and the upward overspeed protection of the cage needs to be realized with the help of a complex mechanism

[0004] There is also a construction hoist located in the elevator shaft of the building, which adopts the traction transmission of the traction machine bottom pit installation method, the rope winding ratio is 2:1, and the traction machine is a permanent magnet synchronous gearless traction machine. There are hanging cages and counterweights on both sides. The weight of the system acts on the traction machine, and the main shaft bears a large load, which has a great impact on the life of the traction machine bearings. This installation method also requires a large hoistway area , the hoistway efficiency utilization rate is not high, and the number of steel wire ropes that need to be configured is large; in addition, the traction machine is fixed in the bottom pit, and the water accumulation and humid environment in the bottom pit have a great impact on its safety and reliability.

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