Semi-gantry crane
A Semi-Gantry Crane is a type of crane where the supports are built on the ground and the cantilever beam extends into the work area creating a semi-gantry appearance. It is typically used for light and medium lifting tasks such as loading and unloading of cargo, maintenance of machines and equipment, docks and various applications within factories.
Types of Semi-Gantry Cranes
Mode of Operation
Semi-Grantry cranes are operated in three main ways: manual control, electric control and automated control. Manual control is usually realized by manually pulling ropes or chains, etc., which is simple and suitable for smaller lifting tasks; electric control is usually realized by remote control or control box, etc., which is convenient and suitable for medium-sized lifting tasks; automation control is realized by computer control and sensors, etc., which is able to automatically carry out complex lifting tasks.
Lifting capacity
The lifting capacity of semi-portal cranes is usually divided according to the weight of the load. Light semi-portal cranes have a lifting capacity of several hundred kilograms to several tons, which is suitable for small factories and workshops; medium semi-portal cranes have a lifting capacity of tens of tons to more than a hundred tons, which is suitable for large-scale factories and wharves and other scenarios; heavy semi-portal cranes have a lifting capacity of several hundreds of tons to more than a thousand tons, which is suitable for high-intensity lifting tasks such as large-scale steel enterprises.
Jib Girder Structure
The cantilever girder structure of semi-portal cranes usually has two kinds of truss structure and girder plate structure. Semi-portal cranes with truss structure are characterized by high strength and light weight, and are suitable for small and medium-sized lifting tasks; Semi-portal cranes with girder plate structure have stronger loading capacity and are more suitable for large lifting tasks.
Use of the environment
Semi-portal cranes are usually used in indoor and outdoor environments. Indoor semi-portal cranes are usually used in factories and workshops for small and medium-sized lifting tasks; outdoor semi-portal cranes are usually used in docks and harbors for medium and large lifting tasks.
Structural characteristics of semi-gantry cranes
The structural characteristics of semi-gantry cranes include components such as bracket, cantilever beam, trolley, trolley, hoisting mechanism, and electric control system.
Bracket: The bracket of semi-gantry crane is usually built on the ground to support the weight and load of the whole crane through the support of the bracket. The support is usually composed of steel structure with sufficient strength and stability to ensure the safe operation of the crane.
Jib Girder: The jib girder of a semi-gantry crane is one of its most important components, which extends into the working area to support the hoisting mechanism and the load. The structure of cantilever beam is usually divided into truss structure and girder plate structure, which can be selected according to the needs of lifting tasks.
Jumbo Truck: The Jumbo Truck is an integral part of the Semi-Gantry Crane that moves along the Jib Girder and is responsible for moving the load from one position to another. The trolley usually consists of components such as motor, reducer, wheels and brakes.
Trolley: The trolley is another component of the Semi-Grantry Crane, which is responsible for moving the hoisting mechanism on the Big Trolley to the correct position for raising and lowering the load. The trolley usually consists of components such as motor, reducer, wheels and brake.
Hoisting Mechanism: The hoisting mechanism is one of the core components of a semi-Gantry crane and is responsible for raising and lowering the load. The hoisting mechanism usually consists of components such as winches, wire ropes, hooks and weight gauges.
Electric control system: the electric control system is another important part of the semi-portal crane, which is responsible for controlling the operation of the crane. The electronic control system usually includes components such as control box, cables, motors and sensors.
2.8T Semi-Gantry Crane
Working Levels of Semi-Gantry Cranes
The working class of semi-gantry cranes is usually divided according to the frequency of its use, operating time and load weight. According to the European standard EN 14492-2, the working level of semi-gantry cranes is divided into the following four types:
Class A: Suitable for light and medium lifting tasks, used for no more than 10 hours per day, with a lifting capacity between 1 and 20 tons.
Class B: Suitable for light and medium lifting tasks, used for no more than 20 hours per day, with a lifting capacity between 1 and 20 tons.
Class C: For medium and heavy lifting tasks, up to 20 hours of use per day, with a lifting capacity between 1 and 20 tons.
Class D: applicable to heavy and super heavy lifting tasks, daily use time does not exceed 20 hours, lifting capacity of more than 20 tons.
Applicable environment of semi-gantry cranes
Semi-portal cranes are usually suitable for indoor or semi-indoor environments, such as factories, warehouses, logistics centers, processing plants, steel mills, automobile factories and so on. The operating environment of the crane should meet the following conditions:
Temperature range: the crane should operate within the temperature range, generally -20℃ to +40℃.
Humidity: Cranes should be operated in an environment with suitable humidity, generally below 85%.
Air: Cranes should operate in an environment that meets air quality standards and is free from corrosive gases, flammable gases, dust and pollutants.
Power: the crane should receive a stable power supply and the voltage range should be within the specified range.
Operation mode of semi-gantry crane
The operation mode of half-gantry crane includes manual operation and unattended automatic operation.
Manual operation: manual operation is the most basic operation mode of semi-portal crane. The operator controls the movement of the crane through the control box or wireless remote control to complete the lifting task.
Unattended automatic operation: unattended automatic operation is an efficient and safe operation method. The crane is equipped with an automated control system, which can automatically complete the lifting task according to the preset program. Unattended automatic operation can improve the efficiency of the crane and reduce the risk of human operation.
The Four Main Advantageous Features of The New Manual Hoist For Crane
Semi-portal crane is an important lifting equipment with the advantages of simple structure, large lifting capacity, wide range of application, safety and reliability. When choosing a semi-portal crane, comprehensive consideration should be made based on the demand for lifting tasks, the working environment, the working level and the mode of operation, etc., to choose the most suitable semi-portal crane for your needs. At the same time, during the use and maintenance of the crane, it should be operated and maintained in strict accordance with the relevant regulations to ensure the operational safety and life of the crane.
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