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Jak si vybrat přenosný rámový portálový jeřáb pro váš projekt?

A Brief Introduction to Portable Frame Gantry Cranes

The mobile gantry crane is a kind of widely used industrial crane. It is a bridge-type crane that is used to run on an elevated track. The single-girder gantry crane runs longitudinally along the track. Its main purpose is to lay the bridge on the elevated track. Run on both sides. The lifting trolley of the single-girder gantry crane is horizontal along the running track on the bridge. This forms a certain square working area, within which you can work and lift various items without being affected by the equipment on the ground.

Portable frame gantry cranes have a wide range of applications and can be used indoors, outdoors, factories, open spaces, docks and other places. Single-girder gantry cranes can be divided into three types, one is an ordinary single-girder gantry crane, the other is a simple single-girder gantry crane, and the other is a single-girder gantry crane dedicated to metallurgy.

Ordinary single-girder gantry cranes are composed of three parts: the lifting trolley, the bridge metal structure, and the bridge operating mechanism. The lifting trolley is divided into three parts, including the lifting mechanism and the trolley operating mechanism. There is also a small frame.

The lifting mechanism is divided into several parts, mainly including motor, reducer, drum and pulley block, and brake. The motor passes through the reducer to rotate the drum, so that the wire rope can lift and lower heavy objects on the drum. The trolley frame is generally a welded structure. It is a frame that supports and installs the lifting mechanism and the trolley operation.

The mobilní portálový jeřáb is an excellent piece of equipment for us, especially in some steel industries, because the weight of steel is unbearable for ordinary people. The gantry crane does the transportation job very well, so it is used in some heavy-duty applications. It plays an excellent role in material handling. If you want to buy this kind of equipment, you must pay attention to it when purchasing. How to choose and buy? We can understand it from three aspects.

1. How to choose single-girder and double-girder gantry cranes

Generally speaking, the lifting quality of the crane is controlled below 50 tons, and the span of the crane is controlled within 35 meters. If there are no special instructions on the use requirements, we can choose a single-girder crane. But if there are requirements for the width of the door legs, for example, the width of the door legs should not be too small, but should be large, and the working speed should not be low, fast or high, or heavy items, large and long items need to be frequently lifted, then we can Choose a double-girder gantry crane.

2. Requirements for span and arm length

The quality of the portálový jeřáb is affected by the span. When we make a selection, we should reduce spans as much as possible when everything meets our usage requirements and meets the required standards for spans.

3. Principles for determining wheelbase

1. The stability of the mast must be maintained when running along the crane track.

2. The size of the flat steel frame of the outriggers should be larger than the overall size of the cargo, so that the cargo can pass smoothly.

3. The span S and the wheel base B must be in a certain proportion. Generally, the wheel base is between one-quarter and one-sixth of the span.

4. Determine the spacing size of the portable gantry crane.

In addition, when operating the přenosný portálový jeřáb, the crane operator should pay attention to a certain distance between the outside of the crane and the cargo or other vehicles, leaving enough space to facilitate the loading and unloading of the crane. Sometimes the space needs to be larger. When the transport vehicle is working within the span, it is necessary to ensure that there is a distance of more than 0.7 meters between the transport vehicle and the door legs. When the transport vehicle is not working, the distance between the transport vehicle and the spreader can be smaller, more than half a meter. That’s it. When hanging goods pass the door legs, a distance of more than half a meter must be maintained.