What are the advantages and disadvantages of European ...

In recent years, the introduction of light cranes, imitation, and promotion of the domestic lifting industry, driven by the interests of the European cranes began to imitate the design concept, without sufficient R & D and design capacity is more to bring in direct accordance with foreign design manufacturing. Plagiarism of suspicion not to mention, the curse of hidden dangers can not be said! The core features of the so-called European cranes are nothing more than the word light and stable. As the saying goes, "stable", "stable" source is "heavy", in the "light" premise of talking about "Steady", it is necessary to mention "slow", whether it is slow working speed or acceleration and deceleration slow, in short, not fast. Although the development of modern electrical technology has brought some guarantee for smooth, the vision of stability is still full of hidden dangers, this paper through the comparison of the two main beam structure of the electric single girder crane to do some analysis and comment.

Yongyang contains other products and information you need, so please check it out.

1. Finite Element Analysis Comparison

In order to visually compare the structural advantages and disadvantages of the main girder of the two types of E.S.G. cranes, span-to-strain simulation is conducted through two groups of main girder sections with identical cross-sectional areas. The finite element comparison tests were as follows.

1.1 Compare model settings

Cross-section of the main beam of two electric single girder cranes. (European-style main beam on left, traditional main beam on right)

1.2 Constraints and loading

Tensile test boundary load conditions for two cross-sectional main girders

1.3 Equivalent effect forces

Equivalent force cloud plots for two cross-sectional main beams (European main beam stress distribution is more uniform than traditional main beam)

1.4 Stiffness comparison

Overall deformation of two cross-sectional main beams (The deformation of the European main beam is slightly greater than that of the traditional main beam)

2 Summary.

2.1 Traditional electric single girder crane main beam.

• This structure gives priority to the operability of the welding sequence, the group of welding parts between the parts are achieved weldability, the main load-bearing I-beams through the lower flange plate and spacer and the main beam fully connected, so that the integrity of the structure is fully guaranteed, but due to the electric hoist wheel pressure concentrated action on the I-beam lower flange, the wheel contact position stress concentration is more obvious.
• In the welding and material level constraints of processing conditions, I-beams through two full welds and a number of spacer connection welds and the main beam firmly connected as one, and hot-rolled I-beams to overcome the stress concentration problem is higher than the reliability of the welded structure, which effectively improves the safety of the structure. The main beam of this structure is still in good condition under hard-start high-inertia impact conditions and even under brutal operating conditions, as shown by decades of use.
• The main beam of this structure, with its low rail position, takes up more height space when used in conjunction with traditional electric hoists (such as CD). At the same time, the close spacing of the hoist wheels on both sides of the track causes the electric hoist to easily swing in the horizontal plane perpendicular to the direction of the main beam.

2.2 European-style electric single girder crane main beam.

• Because the hoist wheels are centered or lowered, the space utilization rate in the height direction is improved, which improves the problem of low lifting space of the main beam of traditional single girder cranes.
• The distance between the hoist wheels is enlarged and the contact length of the wheels is increased, which effectively improves the problem of stress concentration at the walking track and the horizontal oscillation of the electric hoist in the direction perpendicular to the main beam.
• The main load-bearing parts of the structure were changed from I-beams to thicker lower flange plates, and although the wheel pressure was evenly distributed to both sides of the main beam, due to the smaller web spacing, the internal welds were only processed on three sides of &#;, and the partition and lower flange were not welded. The concentrated stresses caused by the wheel pressures act directly on the lower flange, which is connected to the web only by a single corner weld, and the local tensile stresses of this weld are very unfavorable to the fatigue of the weld. The stress level of the upper flange is much higher than that of the upper flange of the main girder of the traditional electric single girder crane, which makes the main girder of this structure more prone to collapse and failure during fatigue and high-strength operation.

Personal view.

The main beam of European-style electric hoist single girder cranes has higher requirements on the level of materials and welding to a certain extent and even has high requirements on the operation and use, so it is more "pretentious" in production and use, and even needs to be protected by reliable inverter technology. In comparison, the main beam of traditional single girder cranes has obvious characteristics of the times, with a rugged, thick, and durable design. Of course, the main beam of traditional single girder cranes can also become taller with the addition of modern frequency conversion technology and the overall boring and milling process; but there is no escaping the need to face the problem of low lifting space and hoist lateral swinging easily. In short, two kinds of single girder cranes need to be selected strictly according to the manufacturing conditions and use environment. With the advancement of welding technology, the welding robot can be used to carry out welding operation in a small space, which also improves the welding quality, which is an advantage for the above two main girder structures.

Goliath Cranes or Portal Cranes Explained. What is a goliath crane?

Goliath cranes, sometimes called portal cranes, are similar to overhead travelling cranes (OHTC&#;s), but instead of running on rails at high level, or on a free standing gantry structure, they run on rails on the floor. The main advantage of a goliath crane is the lack of supporting gantry rails can save money.

Access is often better as goliath cranes do not have crane columns every 6 meters, therefore saving money. Traditional OTC&#;s require free standing columns, markedly having more impact on the factory floor. Crane floor rails are sometimes seen as a disadvantage, especially as fork trucks cannot drive over them. In addition, people may occasionally trip on them. To prevent this, rails for goliath cranes are sometimes sunk into the floor. This involves digging out a small channel for the rail to be dropped into, and fastened down securely. We usually leave the top of the rail at floor level, to assist vehicle movement over the tracks and prevent the raised rail becoming a tripping hazard.

Sunken floor rails (image below) helps to reduce the trip hazard, and can be driven over with fork lift trucks. with sunken rail it can occasionally get contaminated with stones, leaves and other debris. Regular cleaning and inspections can avoid this as part of a maintenance program.

The company is the world’s best Crane Rail for Sale supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.

Are goliath cranes dangerous?

In addition, staff and visitors to site will need to be wary as a moving goliath crane can cause serious injury to pedestrians. Your site should have walkways and staff should wear high visibility clothing at the very least. Your safety officer will be able to advise you, and will know about restrictions you need to implement locally.

We purchased the goliath below and the client added a safety barrier, to prevent injury as people walked though a side door.

As well as goliath cranes some end users purchase semi goliath cranes from us. A semi goliath crane is where one side runs on the floor, as with traditional goliath&#;s, but the opposite side runs on either the building or on a free standing gantry structure.

10 things you need to know or ask about Goliath Cranes.

1. What SWL, safe working load do you require?
2. Do you require a goliath crane or a semi goliath crane?
3. What span to you require, between the upright powered legs?
4. How high to you need from hook to floor?
5. Do you require the floor rails to sunk into the floor to avoid trip hazards?
6. Do you require additional hand rails for personnel protection.
7. Is it for indoor or outdoor use?
8. Do you require a pendant control or a radio remote control to operate the crane?
9. Voltage for electrically driven goliath&#;s in the UK is normally; 3 phase and earth, 415 volts.
10. Will the power be fed from buzz bar or a cable reeling drum?

Please use our search facility to find out what goliath cranes we have in stock. We currently have a good stock of goliath cranes for sale.

Or contact us to speak to specialist crane adviser. Never be afraid to ask our experts to explain simply &#;what is a goliath crane?&#;

Lastly, visit our YouTube channel.

Want more information on Heavy Steel Rail Manufacturer? Feel free to contact us.