Anti-corrosion Treatment Brackets should be treated with anti-corrosion measures to prevent rust and deterioration over time. This is crucial as they are often exposed to various environmental conditions, such as moisture, tolm, and chemicals. Corrosion can weaken the structural integrity of the brackets, potentially leading to instability and safety hazards. Näiteks, in industrial settings where there may be corrosive gases or liquids present, proper anti-corrosion coating or treatment can significantly extend the lifespan of the brackets and ensure the continuous safe operation of the trolley conductor system.
Continuous Welding Continuous welding of the brackets is required to ensure their strength and stability. A continuous weld provides a seamless connection, reducing the risk of cracks or breaks. This is especially important in applications where the trolley conductor system may experience vibrations or mechanical stresses. If the welding is intermittent or of poor quality, the brackets may become loose or even detach, causing disruptions in the power supply and posing a danger to nearby personnel and equipment.
Firm Installation and Consistent Mounting Hole Positions The brackets must be installed firmly to support the weight and movement of the trolley conductor. Consistent mounting hole positions are essential for proper alignment and installation of the conductor system. If the mounting holes are misaligned, it can lead to difficulties in assembling the components and may result in an uneven or unstable installation. This could cause the trolley conductor to deviate from its intended path, leading to power interruptions or damage to the conductor and associated equipment.
Below 300A, the bracket spacing should be less than or equal to 1.5 meters.
Above 400A, the bracket spacing should be less than or equal to 3 meters.
For multi-line seamless trolley conductors, the bracket spacing is typically 1.0 – 1.5 meters. For 导管型 trolley conductors, the bracket spacing is also 1.0 – 1.5 meters. For cable trolley type, the bracket spacing is 1.0 – 2.0 meters. For arc section brackets, the spacing should be less than 1.0 meter depending on the site conditions.
Proper bracket spacing is crucial for maintaining the stability and functionality of the trolley conductor system. If the brackets are spaced too far apart, the conductor may sag or vibrate excessively, leading to poor electrical contact and potential power losses. On the other hand, if the spacing is too close, it may increase the cost and complexity of installation without significant performance improvements.
III. Hanging Components The hanging components should be installed in the correct position, firmly fixed, and the quantity should meet the requirements. These components play a vital role in suspending the trolley conductor and ensuring its proper alignment. Incorrect installation or insufficient quantity of hanging components can cause the conductor to sag or shift, affecting the smooth operation of the system and potentially causing damage to the conductor and other equipment.
IV. Trolley Conductor Body
Gap between Protective Enclosure and Conductor The gap between the protective enclosure and the conductor should be less than or equal to 2mm. This small gap is designed to prevent foreign objects from entering and interfering with the electrical contact while still allowing for proper heat dissipation. If the gap is too large, debris or moisture could enter, leading to short circuits or other electrical failures. If it is too small, it may impede the expansion and contraction of the conductor due to temperature changes and cause mechanical stress.
Straightness – Deviation from Track Center Height The straightness of the trolley conductor in relation to the track center height should have an allowable deviation of less than ±15mm. This ensures that the trolley collector can maintain proper contact with the conductor as it moves along the track. If the height deviation is too large, the collector may experience uneven wear or lose contact with the conductor, resulting in power interruptions and potential damage to the collector and conductor surfaces.
Straightness – Longitudinal Deviation from Track Center The longitudinal deviation of the trolley conductor from the track center should also be less than ±15mm. This helps to maintain the alignment of the conductor and ensures that the trolley can move smoothly without veering off course. A significant longitudinal deviation can cause the trolley to experience lateral forces, leading to increased wear on the wheels and rails and potential derailment.
Twist Degree The twist degree of the trolley conductor should be less than 15mm per 10 meters. Excessive twisting can affect the electrical conductivity and mechanical integrity of the conductor. It can also cause the collector to misalign and have difficulty maintaining proper contact, leading to power fluctuations and potential damage to the system.
V. Expansion Joints
Quantity in Accordance with Regulations The number of expansion joints should comply with the specified requirements. Expansion joints are essential for accommodating the thermal expansion and contraction of the trolley conductor due to temperature changes. If the number of expansion joints is incorrect, it may lead to stress on the conductor and its supporting structures, potentially causing damage or failure.
Gap Distance to Accommodate Theoretical Expansion The gap distance of the expansion joints should be sufficient to accommodate the theoretical expansion and contraction caused by the maximum temperature difference at the installation site. This ensures that the conductor can expand and contract freely without causing damage or affecting the electrical connection. If the gap is too small, the conductor may be compressed or stretched, leading to mechanical stress and potential electrical problems. If it is too large, it may affect the stability and alignment of the conductor system.
VI. Current Collectors
Firm Welding of Square Steel Frame and Perpendicularity to Trolley Conductor The square steel frame of the current collector should be welded firmly, and the perpendicularity to the trolley conductor should have an allowable deviation of ±3mm. A firm weld ensures the stability of the current collector, and proper perpendicularity is crucial for maintaining good electrical contact. If the frame is not welded properly or the perpendicularity is off, the collector may not make full and even contact with the conductor, resulting in power losses and potential arcing.
Size Relationship between Square Steel Bracket and Trolley Conductor The size relationship between the square steel bracket and the trolley conductor should ensure that the movable arm of the current collector is parallel to the trolley conductor body, with an allowable deviation of ±3mm. This parallel alignment is necessary for consistent and reliable electrical contact. If the movable arm is not parallel, it can cause uneven wear on the collector and conductor and affect the power transfer efficiency.
Smooth Sliding and Appropriate Pressure The current collector should slide smoothly on the plane of the trolley conductor and maintain the specified pressure. The proper pressure is essential for ensuring good electrical contact without excessive wear or damage. If the pressure is too low, there may be poor conductivity and power interruptions. If it is too high, it can cause excessive friction and wear on the collector and conductor surfaces, reducing their lifespan.
VII. Fasteners The torque of the fastening nuts should conform to the manufacturer’s recommended values. The recommended values are: M10 – 28NM, M8 – 12NM, M6 – 6.5NM. Using the correct torque is crucial for ensuring the proper tightness of the fasteners. If the torque is too low, the fasteners may become loose over time, leading to instability and potential disassembly of the components. If it is too high, it can cause damage to the threads or the components themselves, affecting the overall performance and safety of the system.
VIII. Power Incoming Line The incoming line end should be firmly fixed and not subjected to tensile forces. A loose or poorly fixed incoming line can lead to power interruptions, electrical arcing, and potential damage to the electrical connections. It is essential to ensure that the incoming line is properly secured to provide a stable and reliable power supply to the trolley conductor system.
In conclusion, strict adherence to these installation and acceptance standards for trolley conductors is essential for ensuring the safe, efficient, and reliable operation of the entire system. Each component and parameter plays a crucial role in maintaining the integrity of the power transmission and the smooth movement of trolleys or other equipment that rely on the trolley conductor system. Regular inspections and maintenance should also be carried out to ensure that the system continues to meet these standards over its operational lifespan.
