Dejun Overhead Cranes & Dejun Gantry Cranes

Dejun Overhead Cranes & Dejun Gantry Cranes

Dejun Crane Machinery is a large-scale enterprise that provides lifting equipment transportation, installation, and other related services. It leads the design and production of customized single and double-girder bridge gantry cranes, electric hoists, etc. It can adjust the products to the best quality according to your needs. In the best condition, if you have any special requirements, please get in touch with us and we will customize the products according to your needs.

1 What are overhead cranes & gantry cranes?

An overhead crane, commonly called a bridge crane, is a type of crane found in industrial environments. An overhead crane consists of two parallel rails seated on longitudinal I-beams attached to opposite steel columns by means of brackets. The traveling bridge spans the gap. A hoist, the lifting component of a crane, travels along the bridge. If the bridge is rigidly supported on two or more legs running on two fixed rails at ground level, the crane is called a gantry crane.

2 What are the common types of bridge gantry machines?

There are thousands of types and models of bridge gantry cranes. The common types of bridge cranes and gantry cranes are (if you have special requirements, please contact us for customization):

2.1 Bridge crane

2.1.1 Single girder overhead crane

A single-girder bridge crane has only one beam. It is a lifting device that is used to lift materials across workshops, warehouses, and stockyards. Because its two ends are located on tall cement pillars or metal supports, it looks like a bridge. The bridge of the single-girder bridge crane runs longitudinally along the tracks laid on the elevated structures on both sides, making full use of the space under the bridge to lift materials without being hindered by ground equipment.

2.1.2 Suspension bridge crane

A suspended single-beam crane is a lifting device that can be moved and adjusted. It usually consists of a single beam suspended on an elevated frame and a manual or electric winch. It can be hung on the roof or superstructure of the building. The crane track does not require additional auxiliary support. Whether it serves part or all of the workshop, it can be installed at a low cost. It is usually used for loading and unloading goods, repairing machines, etc.

2.1.3 Grab bridge crane

A bridge crane using a grab bucket as a spreader can perform operations such as unloading, stockpiling, unloading, retrieving, and loading materials during raw material preparation operations. Grab bridge cranes are widely used for hoisting general cargo in various factories and mines, and are equipped with special spreaders such as grabs for special operations.

2.1.4 Electromagnetic bridge crane

An electromagnetic overhead crane is an electric overhead crane that uses magnets to carry metal loads. It is designed and manufactured to lift and move magnetic metal products and materials such as steel rods and plates in workshops. Widely found in steel rolling production lines, warehouses, stockyards, and workshops.

2.1.5 Explosion-proof bridge crane

Explosion-proof bridge cranes are mainly used for lifting in explosive gas environments. Its basic structure is similar to ordinary bridge cranes, but explosion-proof measures are taken in mechanical parts such as motors, electrical parts, and metal contact surfaces to ensure the safety of use in explosion-proof environments.

2.1.6 Metallurgical casting bridge crane

Casting bridge cranes refer to metallurgical and casting sites with a lifting capacity of 75t (including 75t) and below, which are used to lift ladles or other molten metals. The working level of the whole machine is A7, and a heat insulation layer device is installed at the bottom of the main beam.

2.2 Gantry crane

2.2.1 Semi-gantry crane

The electric hoist semi-gantry crane is a small and medium-sized rail-operated lifting equipment. It is mainly composed of a gantry (main beam, outriggers, lower beams, etc.), a lifting mechanism, a running mechanism, and an electronic control part. The electric hoist is used as the lifting device. The lifting mechanism runs along the lower flange of the main beam I-beam when working. One side of the gantry is equipped with outriggers and runs along the ground track. The other side has no outriggers and runs along the upper track of the factory building. The rest of the structure and configuration is consistent with the MH-type electric hoist gantry crane.

2.2.2 Single main beam gantry crane

The single-beam gantry crane is a crane suitable for lifting large items. It usually consists of two columns and a single beam spanning between the two columns. It is characterized by a solid structure and strong carrying capacity and is suitable for lifting large-tonnage items. Single-girder gantry cranes are commonly used in shipbuilding, dockyards, railways, automobile manufacturing, and other industries.

2.2.3 Double main beam gantry crane

Double-girder bridge cranes have a double-girder structure and are divided into three working levels: A5, A6, and A7 according to the frequency of use. It is suitable for loading and unloading in open-air warehouses, material yards, railway cargo stations, ports and terminals, etc. It can also be equipped with a variety of special spreaders for a variety of special operations.

3 What industries can cranes be used for?

3.1 Mining Industry >

3.2 Metallurgical Industry >

QDY metallurgical crane ≤75T; YZ casting crane >75T

Mainly used in steel plant smelting workshops to lift ladles; working level is at least A7, can be used in an environment of 60-80 degrees Celsius, with a heat insulation layer under the main beam, equipped with a closed driver's cab and industrial air conditioning, protection grade IP55, insulation grade H.

3.3 Waste Incineration Industry >

Grab bridge crane

The garbage grab bridge crane is the core equipment of the garbage feeding system of various garbage incineration power plants in modern cities. It is located above the garbage storage pit and is mainly responsible for the feeding, transportation, mixing, retrieval, and weighing of garbage. The garbage grab crane produced by our company can perform strict lifting and conveying operations to ensure the normal operation of the waste incineration power plant. This crane can realize manual, semi-automatic, and fully automatic control.

3.4 Transportation Industry >

3.5 Automobile Industry >

3.6 Aerospace Industry >

3.7 Construction Machinery Industry >

3.8 Food Pharmaceutical Industry >

Clean room bridge crane

Since ordinary electric hoists produce a large number of fine particles during operation, they cannot meet the cleanliness requirements of special workshops in high-precision electronics, food, aviation, and other industries.

According to the strict requirements of dust-free space, on the one hand, parts that are less likely to produce particles are selected, and on the other hand, moving parts that may produce tiny particles are designed to be closed to prevent particles from leaking out and contaminating other workpieces or products in the workshop. At the same time, components that require lubrication such as bearings and drums are sealed and maintenance-free, and leak-proof measures are adopted to ensure no oil dripping.

Compared with general-purpose cranes, dust-free cranes used in clean-room dust-free workshops are required to have the characteristics of wear resistance, wide clean range, low failure rate, large speed range, and accurate positioning. Dust-free cranes are not only required to be dust-proof, do not generate dust, and do not absorb dust, but also have the characteristics of beautiful appearance and long maintenance cycle.

3.9 Military Manufacturing >

3.10 Nuclear PowerEnergy Industry >

The circular bridge crane used in nuclear power plants is a special heavy-duty bridge crane that provides lifting services for the installation and maintenance of heavy equipment in the reactor building and reactor refueling during the construction and operation stages of the nuclear power plant. Because its wheels move along the circular ostium the upper rail runs, so it is called a circular bridge crane.

3.11 Paper Industry >

3.12 Petrochemical Industry >

Explosion-proof bridge crane

Explosion-proof cranes are widely used in flammable and explosive production sites with explosive gases, steam, dust, fibers, or flying catkins. More than 50% of places in coal mines are explosive hazardous areas, 60% of places in the petrochemical industry are explosive hazardous areas, and more than 80% of production workshops in the chemical industry are explosive hazardous areas. Explosion-proof cranes adapt to environmental protection requirements by preventing the generation of dangerous sparks and dangerously high temperatures.

3.13 Ship Industry >

3.14 Tunnel Industry >

3.15 Wind Power Industry >

3.16 Metal Processing Industry >

4. What parameters do you need to provide when purchasing a bridge gantry crane?

4.1 Lifting capacity

Lifting capacity refers to the maximum weight that the crane can lift under standard conditions. This parameter is one of the most important parameters of the crane and one of the parameters that require the most attention when purchasing a crane. Depending on different needs, the lifting capacity can range from a few tons to hundreds of tons.

4.2 Lifting Height

Height refers to the distance from the ground to the hook of the crane, which is the highest height the crane can reach. This parameter will directly affect the hoisting effect of the crane. Therefore, when purchasing a crane, the height should be determined according to actual needs.

4.3 Hook speed

Hook speed refers to the lifting speed of the crane. This parameter is of great significance for the efficiency and safety of the crane. If the hook speed is too fast, accidents may occur, and if it is too slow, work efficiency will be affected. Therefore, when purchasing a crane, the hook speed should also be considered.

4.4 Working environment

The working environment of the crane is also a very important parameter. Different cranes are suitable for different working environments. For example, cranes that work in high-temperature environments need to choose high-temperature-resistant materials, while cranes that work in low-temperature environments need to choose low-temperature-resistant materials. Therefore, when purchasing a crane, you must also consider the working environment.

5 Our after-sales service:

5.1 Warranty period

Strictly follow the manufacturer's warranty period, which is twelve months after the final acceptance of the goods.

5.2 Equipment installation and commissioning

We are responsible for delivering the equipment to the buyer's location/warehouse according to the buyer's requirements after the initial acceptance inspection and providing online installation guidance services for the equipment.

Note: If the purchaser requires offline installation services (paid), we will be responsible for organizing professional technicians to install and debug the equipment. Please inquire for details.

5.3 Maintenance service

We promise to respond within 24 hours after receiving the technical service request of the purchasing unit and eliminate the fault of the goods as soon as possible according to the difficulty of the fault.

During the warranty period, we are responsible for the repair and replacement of spare parts and goods that need to be replaced not due to improper operation.

After the end of the warranty period, we will continue to provide maintenance and repairs. We will provide maintenance plans within 24 hours after receiving the user's request for repairs. The maintenance charges will be implemented according to our standards.

6 Collection of shipping pictures/video materials:

6.1 5 ton single girder overhead crane shipped to UAE

6.2 2 ton bridge suspension crane shipped to Uzbekistan

6.3 32 ton double beam gantry crane sent to Uzbekistan