Portable hoisting device

Abstract

The invention relates to a hoisting device. A central air conditioner shell-and-tube heat exchanger comprises a shell, an end cover and a heat exchanger main body arranged in the shell. A flange plateis arranged on the shell, and a pair of hoisting holes are formed in the flange plate. The device is characterized by further comprising a hoisting device, wherein the hoisting device comprises a cross beam, a support, a lifting hoist and a lifting hook, a cross rod of the support is provided with a cross beam stretcher positioning frame, the two ends of the cross beam penetrate through the crossbeam stretcher positioning frame and are placed on the support, a vertical rod of the support is detachably mounted on the hoisting holes, the lifting hoist is lifted on the cross beam, and a liftingnostril capable of being lifted by the lifting hook is arranged on the end cover. The device has the advantages of simple structure, flexible arrangement, large bearing capacity, convenience carryingand universality.

Description

technical field [0001] The invention relates to the technical field of air-conditioning heat exchangers, in particular to a portable lifting device for removing and lifting the end cover of a central air-conditioning shell-and-tube heat exchanger. Background technique [0002] Water-cooled central air conditioners have been widely installed in hotels, shopping malls, hospitals, office buildings and factory buildings. The two key components of the refrigeration system, the evaporator and the condenser, are both shell-and-tube heat exchangers, commonly known as blisters. It is a large cylindrical structure, the shell is formed by cast iron or rolled by thick steel plate, and the end caps at both ends are also cast or billet processed. As a water-air heat exchange device, it needs to meet the cooling load of the whole building or multiple buildings, so the volume of the water bubble is very large and heavy, and the end cover is also very heavy. [0003] The water-cooled shell-...

AI Technical Summary

Problems solved by technology

The disassembly and installation of the bulky end cover is a very troublesome thing. The general method is to use a hoist, but due to the limited space in the machine room, it is difficult to place the poles, and it is impossible to lift, disassemble and install them in the correct position.

In many cases, we can only adopt a stupid method: the lighter end cover is lifted by many people, and the heavier end cover is installed with bolts on the ceiling, but the owner is often not allowed to drill the ceiling

There are various other lifting methods, and it is difficult to align the screw holes during installation, which makes the disassembly and installation of the heat exchanger end cover very time-consuming and laborious, and often strains the screw holes and threads.

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