Semi Gantry Crane with Electric Hoist

Semi gantry crane with electric hoist has a lifting capacity range of 2t-10t, a span of 10m-20m, and a lifting height of 1m-30m. Semi gantry crane has a light working duty of A3 or A4. Semi gantry crane has a light structure and a beautiful shape, making it visually appealing. Semi gantry crane also has good technology and a long life, ensuring that it can be used for a long time. The operation of the semi gantry crane is flexible and smooth, and it is safe and reliable to use. Semi gantry crane with electric hoist has a wide range of applications and high cost performance. Additionally, non-standard products can be Dongqi Crane supplied according to customer requirements.

Semi gantry crane applications:

Semi gantry crane is particularly well-suited for outdoor environments, making it an ideal choice for various settings.
The semi gantry crane is primarily used for lifting, transporting, and loading heavy objects, ensuring efficient and precise material handling in a wide range of applications.

• Stations: Semi gantry crane can be employed at railway and transportation stations for loading and unloading cargo onto trains or trucks.
• Wharves: Wharves and docks benefit from its versatility in handling cargo arriving by ship or vessel.
• Warehouses and Yards: Semi gantry crane are used in warehouses and open yards to efficiently move and organize materials, enhancing storage and logistics processes.
• Construction Sites: Construction sites leverage semi gantry crane's mobility and lifting capabilities for tasks like placing heavy construction materials or equipment.
• Cement Products Factories: Semi gantry crane assist in the production and transportation of cement products.
• Mechanical and Structural Assembly Plants: They are employed to assemble and move heavy machinery and structural components.
• Hydropower Stations: Hydropower stations use semi-gantry crane for maintenance and installation of hydropower equipment.

Semi gantry crane structure and characteristics

The semi-gantry crane Mainly consists of bridge, crane traveling mechanism, lifting mechanism and electrical system, etc.

1. Bridge: The main girder, made of durable materials, supports heavy loads with a well-distributed camber. Safety bumpers ensure secure trolley movement.
2. Crane Traveling Mechanism: Featuring independent drive, it's simple, compact, quiet, and reliable. Aesthetic design complements functionality.
3. Lifting Mechanism: Employs electric hoists for powerful, efficient, and safe load handling. Easy installation, load limiters, and intelligent controls enhance usability.
4. Electrical System: Manages crane operations, offering safety, load monitoring, alarms, and seamless integration. It's designed for easy maintenance and compact intelligence.

Semi gantry crane overall mechanical design drawing:

Semi gantry Crane wire and cable: 

• Wire and cable with Copper, multistrand and insulating sheath used allover the crane
• Multistrand single cable, whose cross area of control wire≥1.5mm2 and 1.0mm2 multistrand multicore cable, cross area of power line≥2.5mm2 
• The cables set in trunkings or tubes with thickness of 1.5mm~2mm
• Protection devices at the parts of mechanical injury, chemical corrosion or oil erosion

Semi gantry Crane control mode: 

1. Pendant: control the actions of all mechanisms by pressing the buttons 
2. Remote control: control the actions of all mechanisms with industrial remote control 
3. Cabin control: control the actions of all mechanisms with the buttons, master switches, cam controller or linkage in the cabin

The crane could also have two sets control devices, such as: pendant + remote control or cabin + remote control. Two control modes could not be used together for safety. 

Semi gantry crane's electric protection system:

The semi-gantry crane's electric protection system ensures safety and reliability through various features:

1. Short Circuit Protection: It employs an automatic air-breaker switch in the main power circuit to protect the control circuit from short circuits.
2. Voltage-Loss Protection: This function requires the start button to be repressed after a power restoration to prevent unintended crane operation.
3. Emergency Power Switch: The crane has a rotating reset-type emergency power switch, conveniently located for quick power shutdown in emergencies.
4. Overload Limiter: It issues a hint alarm at 90% of the rated load capacity and cuts power for lifting, accompanied by a prohibitive alarm at 110% of the rated load capacity. The sensor is resilient, moistureproof, anti-seismic, and interference-resistant.
5. Position Limiter: Fire and traveling limiters restrict lifting height, protect the controller, and ensure safe crane movement. Wind-proof rail clamps outdoors interlock with the main power switch, preventing crane startup while locked.
6. Zero Position and Interlock Protection: The cabin control crane prevents motor automatic operation after power restoration, and interlocking door and switches prevent accidents when doors open suddenly as the crane starts.
7. Fault Protection: In case of three-phase faults or voltage issues, the system automatically cuts off the main power, safeguarding people and equipment.
8. Ground Protection: The crane, metal shell, raceway, and electric equipment components are grounded for safety. Grounding resistance is ≤4Ω, and the crane rails serve as ground wires. Insulation resistance to ground is ≥1MΩ at normal temperature (measured with a 500V megger).