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(1) The power supply safety series products are developed and produced by our factory based on relevant foreign materials and advanced products, and in response to the accidents prone to occur with exposed sliding lines in domestic lifting facilities. This series has three types: composite type, square tube type, and spliced type safety sliding contact lines, which are patented products of our factory.
(2) The power supply safety sliding contact line series developed by our institute has complete varieties and wide applications. It can be used for lifting machinery in factories, mines, warehouses, stations, ports, and docks, such as electric hoists, beam cranes, and overhead cranes; elevators, automated production lines, and other mobile operating conductive equipment.
(3) Users can correctly select the appropriate specification of power supply safety sliding contact line according to the model of lifting machinery, so as to meet the electricity needs of lifting machinery, and also achieve technical and economic indicators such as electricity saving, energy saving, and reduced energy consumption.
(4) Correct selection of power supply safety sliding contact line is the key to obtaining the best technical and economic effect. According to reliability research, using this sliding contact line can improve the reliability of the system by two orders of magnitude. Users should refer to this manual in detail when selecting power supply sliding contact lines to fully understand product performance and characteristics, thereby achieving the best usage effect.
2. Product Working Principle, Characteristics, and Applications
(1) Main Components and Working Principle
The power supply safety sliding contact line device consists of two main components, the conduit and the current collector, as well as some auxiliary components, as shown in the figure:
1. Conduit: It is a semi-enclosed special-shaped tubular component and is the main part of the safety sliding contact line. Inside, 2-9 bare guide rails can be embedded as power supply conductors as needed. The guide rails are insulated from each other and from the shell, ensuring the safety of power supply. It also effectively prevents electric shock accidents for maintenance personnel during live maintenance. Each conduit produced by our factory is 4m in length and can be connected to any required length. Generally, conduits are made in straight shapes, but can also be made in arc shapes or other special shapes according to special requirements.
2. The current collector is a set of brush frames that run inside the conduit. It is driven by a fork (or traction chain, etc.) installed on the electrical mechanism (such as a traveling crane, trolley, electric hoist, etc.), making it run synchronously with the electrical mechanism. It transmits the electrical energy from the guide rails and brushes to the motor or other control elements. The number of poles of the current collector brushes ranges from 3 to 16, corresponding to the number of guide rails in the conduit.
(2) Product Characteristics
1. Safety: The shell of the power supply safety sliding contact line is made of engineering plastic with high insulation performance. The protection level of the shell can reach IP13 and IP55 levels as needed, providing protection against rain, snow, frost, and ice attacks as well as contact with foreign objects. The product has been tested under various environmental conditions. It has good insulation performance and causes no harm to maintenance personnel touching the outside of the power transmission conduit.
2. Reliability: The power transmission guide rail has excellent conductivity, fast heat dissipation, high allowable current density, low impedance, and low line loss. The brushes are made of metal copper and carbon alloy materials with high conductivity and high wear resistance. The current collector moves flexibly and has good directional performance, effectively controlling contact arcs and series arcs.
3. Economy: The power supply safety sliding contact line device has a simple structure, high allowable current density, low resistivity, and low voltage loss, saving about 10% of electricity. It uses plastic instead of steel and copper, has a novel design, requires no additional insulation structure or compensation wires, and is installed on the same side as the crane control room, saving installation materials and costs.
4. Convenience: The power supply safety sliding contact line device integrates multiple poles of busbars into one conduit, making assembly simple. Its fixing brackets, connecting clamps, and suspension devices are supplied as universal parts. Installation, disassembly, adjustment, and maintenance are also very convenient.
(3) Applications: The power supply safety sliding contact line device can be used for electric hoists, electric beam cranes, and overhead cranes; stacker cranes, automatic testing lines for electromechanical products, automated production lines; mobile electric tools and other mobile conductive equipment, as well as fixed busway installations in factories, mines, workshops, and office areas.
Note: The above information and technical parameters are compiled and released by Yangzhou Darui Electric Co., Ltd.
