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Basic knowledge of Weihua crane

Weihua crane general bridge crane types mainly include: hook (QD), electromagnetic (QC), grab (QZ) three categories, of course, and derived from such as the morning of dual-use, three-use crane.The lifting weight of weihua crane now ranges from 5t to 800t, and the maximum tonnage of girder crane made in 2009 is 900t.gantry crane is mainly composed of bridge frame, truck running mechanism, trolley, electrical equipment, etc.Hoisting trolley is equipped with lifting mechanism and trolley operating mechanism, lifting mechanism is mainly composed of motor - reducer - brake - drum and so on.The general operation mode is as follows: the bridge frame runs on the workshop track with the trolley driven by the truck operation mechanism, the trolley runs on the bridge frame with the trolley driven by the trolley operation mechanism, and the lifting mechanism runs up and down with the heavy objects.

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According to the different working environment, QDY hook bridge casting crane is useful for lifting molten metal metallurgy and casting places. The working level of the whole machine is generally A7. Heat insulation layer device is added at the bottom of the main beam.Cranes larger than 74 tons, the model is YZ. By far, the largest casting crane made by weihua crane is YZ320t/50t A7.QY type insulation hook bridge crane, it is mainly used for electrolyze non-ferrous metals such as aluminum and magnesium materials factory workshop, the general may charged or hanging objects with magnetic, general requirements for stainless steel hook of the equipment, from the hook to the cart wheel added a few class insulation device, ensure no current on charged by hanging on the component to the crane.QB explosion-proof bridge crane is suitable for handling materials in flammable and explosive media. Its working speed is generally low. Explosion-proof products are used for electrical equipment, explosion-proof measures are taken for mechanical parts, and cables are used for power supply for large cranes and trolleys.General other crane truck power supply mainly adopts Angle steel or safety sliding contact line, each metallurgical sound field used together with the crane or shipbuilding crane, truck power supply useful high voltage power supply, high voltage transformer price is more expensive.There are also used in steel mills or cargo plants of the electromagnetic beam crane, clamp crane.Refuse grab crane used in refuse power plant.In 2009, our company provided tianjin binhai environmental protection with three garbage grab cranes, which have a higher working level, A8 level, higher degree of automation, full vehicle frequency conversion, PLC control and so on.

Note the following:

1, to pay attention to the crane used by the environment temperature, humidity, whether there is explosive gas.

2, according to the working requirements of the crane, determine the lifting weight of the crane, working level, lifting height, the working speed of the mechanism and other parameters, to determine whether the mechanism needs speed regulation or speed change.

3, when talking about grab crane to explain the characteristics of materials, such as specific gravity, granularity, viscosity and so on.

4, for the lifting of liquid hot metal or important items (such as nuclear power plant), it should be noted that the lifting double brake or add safety brake.

4, when talking about the electromagnetic bridge crane, it is necessary to specify the power failure magnetic protection measures and time of electromagnetic chuck.

5. For cranes working in explosion-proof environment, detailed explosion-proof gas characteristics and required explosion-proof grade shall be required when ordering.Explosion-proof grade is generally divided into Diibt4 and Diict4.

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