Power Station Gantry Crane

The application scenarios of power station gantry cranes mainly include the following aspects:

• Unidirectional gantry crane: suitable for places with fixed work direction and sufficient space, such as hydropower stations with narrow rivers or limited space, to take advantage of its compact structure and convenient operation.
• Bidirectional gantry crane: suitable for large and complex hydropower stations, requiring frequent adjustment of operation direction and response to complex tasks. Its high flexibility and versatility are particularly prominent in such scenarios.
• Mobile gantry crane: With good mobility, it can be used in irrigation, sedimentation, water diversion, and sealing fields in hydraulic engineering, such as sealing and plugging water outlets, opening gates for water diversion, etc., to ensure the normal operation of hydraulic engineering and provide reliable water sources for irrigation and human life.
• Intelligent gantry crane: By applying advanced technologies such as precise positioning and visual AI gate library management, unmanned automatic control of the entire operation process of the gantry crane is achieved, improving operational accuracy and efficiency, reducing safety risks, and meeting the development needs of modern power stations.

In summary, different types of power station gantry cranes are suitable for different engineering scenarios based on their design characteristics and functional diversity. When choosing, comprehensive consideration should be given to the actual needs and site conditions of the power station to ensure the selection of the most suitable type of gantry crane

The technical characteristics of power station gantry cranes mainly include the following aspects:

• The lifting load is inconsistent with the operating load: The opening and closing force of the power station gantry crane not only includes the gravity of the gate and the resistance of the gate slot, silt, rust, dirt, and water pressure, but also needs to be multiplied by a larger safety factor. This force varies during the lifting process, and the operating load generally only refers to the load of the lifting device plus the gate.
• Small span: Due to the characteristics of hydraulic structures, the width of the dam crest or tailwater platform is limited, so the span of the power station gantry crane is usually small, with larger spans of more than ten meters and smaller spans of only a few meters.
• Low speed: In order to facilitate operation, ensure that the lifting device is aligned with the gate and that the lifted gate runs up and down along the gate slot, with a lower speed requirement for the operating mechanism. At the same time, in order to avoid excessive impact when the gate descends, the speed of the lifting mechanism should not be too fast.
• Large lifting range: Due to the fact that the power station gate is located at a certain depth underwater, the lifting range of the power station gantry crane is relatively large, with a minimum lifting range of more than 20 meters and maximum lifting range of over 100 meters.
• Special requirements for steel wire ropes and lifting appliance: Considering the underwater working environment, galvanized steel wire ropes should be used for steel wire ropes. Sliding bearings are generally used for pulley bearings, and if rolling bearings are used, sealing devices need to be considered. The shaft generally requires chrome plating or other anti-corrosion treatment.
• Equipped with auxiliary cranes and specialized lifting equipment: To meet the functional requirements of power stations, the hoist is usually equipped with auxiliary cranes and specialized lifting equipment, such as grabbing beams, cleaning buckets, small slewing cranes, etc.
• Specific raw materials need to be considered in the design: When designing a gantry crane, basic raw materials such as the basic external dimensions of the gate or trash rack, rated opening and closing force, rated operating load of the operating mechanism, lifting speed of the crane and trolley, maximum lifting range, lifting height above and below the rail, working level of the whole machine and mechanism, and environmental conditions should be provided

The power station gantry crane has the following advantages:

• Operational flexibility: Unidirectional gantry cranes are suitable for places with fixed work directions and sufficient space, while bidirectional gantry cranes are equipped with rotating mechanisms that can operate flexibly in both directions, adapting to changing work needs, especially for complex tasks.
• Functional diversity: power station gantry cranes are not only used for lifting and moving heavy objects, but some designs such as modular cleaning gantry cranes can also achieve gate opening and closing and cleaning functions, meeting various functional requirements.
• Efficiency: The operation of the dam crest gantry crane in power stations is relatively simple and fast, with the option of remote control and on-site control. No additional operating mechanism is required, which can accelerate the opening and closing speed of the power station dam. The opening and closing force is large, and even large power stations can use it.
• Strong adaptability: The design of the power station gantry crane takes into account the special environment of the power station, such as a large lifting range, special requirements for steel wire ropes and cranes, as well as environmental conditions such as wind load, temperature, earthquake magnitude, humidity, etc., making it adaptable to complex working environments.
• Economy: In the case of limited space, a modular cleaning door machine is used to combine the cleaning machine with a traditional door opening and closing machine, maximizing the use of the original structure and achieving "one machine for two purposes", saving space and costs

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