Overhead Engine Lift

1. Product Introduction:

 

The Overhead eot engine lift crane can be used to lift loads from 3 tons to 550 tons, which is widely used to upload and move of normal weight in the fixed crossing space and also can work with various special-purpose hoist in special operations. This Overhead eot crane is consisted of crane bridge, crane traveling mechanism, trolley, electrical equipment, crane hook, etc.

 

If Overhead engine lift crane is used in combustible, explosive or corrosives environment, we recommend QB model to satisfy your need. Explosion proof bridge crane is one of the various types of explosion-proof and hazardous environment material handling equipment, with all the motors and electrical equipment of the explosion proof crane manufactured in line with international standards and regulations. The lifting capacity of the explosion proof bridge crane is 5 to 75 tons and the working class is A4 and A5.

 

3. Component:

 

The bridge is the basic component of the bridge crane, which consists of the main beam, end beam, walkway and other parts. The main beam spans above the span, and has box-shaped, truss, web, round tube and other structural forms. The end beams are connected to both ends of the main beam, and walkways are installed on the outside of the two main beams, with safety railings. The trolley moving mechanism is installed on the walkway on one side of the cab, and the device for supplying power to the trolley electrical equipment, i.e., the sliding wire, is installed on the walkway on the other side. A guide rail is laid above the main beam for the trolley to move. The entire bridge crane moves on the guide rail along the length of the workshop under the drag of the trolley moving mechanism.

 

The trolley moving mechanism is composed of trolley drag motor, transmission shaft, reducer, wheels and brakes, and the driving mode has two types: centralized drive and separate drive.

 

The trolley is placed on the bridge rail and can move along the width of the workshop. The trolley is mainly welded by steel plates, and consists of a trolley frame and the trolley moving mechanism and lifting mechanism thereon.

 

The trolley travel mechanism consists of a trolley motor, brake, coupling, reducer and wheels. The trolley motor drives the trolley driving wheel through the reducer, dragging the trolley along the guide rail. Since the driving wheels of the trolley are close to each other, it is driven by one motor.

 

There are two transmission forms of the trolley travel mechanism: one is that the reduction box is between the two driving wheels; the other is that the reduction box is installed on one side of the trolley. The reduction box is installed between the two driving wheels to make the torque on the transmission shaft more uniform; the reduction box is installed on one side of the trolley to make installation and maintenance more convenient.

 

4. Applicable Environment:

 

Overhead engine lift crane are generally suitable for dusty workplaces, smelting, casting, heat treatment, etc. In these processes, high-temperature dust will inevitably be generated. These dusts float in the air and adhere to various surfaces of the crane, and even affect the normal operation of electrical equipment.

 

5. Wearing Parts:

 

Rope guides, Travel switches, Travel limiters and Brake.

 

6. Environmental conditions for the use of metallurgical cranes:

 

1. The power supply of the crane is generally three-phase AC, with a frequency of 50Hz and a voltage of 380V. The upper limit of the allowable voltage fluctuation on motors and electrical appliances is: +10% of the rated voltage; the low voltage value (peak current) is -15% of the rated voltage; the rated voltage of the ingot stripping crane, clamp crane, guide frame integral mold crane, and slab turning crane shall not exceed 5%.
If there are special requirements for power supply, it can be determined by negotiation between the supply and demand parties according to user needs.

 

2. The altitude of the installation and use site of the lifting machinery shall not exceed 2000m (when it exceeds 1000m, the motor capacity shall be calibrated in accordance with the relevant provisions of GB755).

 

3. Crane working environment temperature and humidity

 

Under normal circumstances, the working environment temperature of the crane is -10~+50℃.

 

The relative humidity shall not exceed 50% at a temperature of +40℃.

 

4. There shall be no flammable, explosive and corrosive gases in the site where the crane is used, and it shall comply with relevant standards and document regulations.

 

5. The installation of crane running tracks should generally comply with the requirements of GB10183GB10183. In special circumstances, separate regulations may be made.

 

7. Transportation:

8. The difference between metallurgical bridge crane and ordinary bridge crane

 

There are significant differences between metallurgical cranes and ordinary cranes in terms of design, construction, material use, operating environment and safety performance. The following is a detailed introduction:

 

Design aspect. Metallurgical cranes usually adopt simpler beam or double-beam structures to adapt to high-temperature working environments, while ordinary cranes adopt truss or open structure designs, focusing on load-bearing and handling capabilities, and usually have stronger load-bearing capacity and stability .

 

Material usage. Because metallurgical cranes need to work in high-temperature environments, they are usually made of alloy materials such as high-strength steel, copper, zirconium and chromium, while ordinary cranes generally use ordinary steel.
operating environment. Metallurgical cranes are designed to be used in harsh environments, such as high temperatures, heavy pollution, etc., and need to be fireproof, explosion-proof, anti-corrosion and high temperature resistant. Ordinary cranes are suitable for relatively mild environments, such as factories, docks, construction sites, etc.

 

Safety performance. Metallurgical cranes have higher requirements in terms of safety performance, including stable driving speed and emergency stopping devices, as well as stricter safety measures. The design of ordinary cranes pays more attention to operational flexibility and basic safety guarantees.control system. Metallurgical cranes pay more attention to the accuracy and safety of control, while the control system of ordinary cranes is relatively simple and focuses on the convenience of operation and ease of maintenance.

 

In summary, metallurgical cranes are designed for harsher environmental conditions requiring greater safety and reliability, while ordinary cranes are suitable for more conventional working environments.

 

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