Brief description of the design for coke quenching cars and electric locomotives in rammed coke ovens

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Brief Description of the Design for the Quenching Vehicle and Electric Locomotive in Tamped Coke Ovens 4.1 This electric locomotive is intended for wet quenching (with an interface reserved for conversion to dry quenching). This motorcar can meet the requirements of wet coking operations. A motor car is used to pull a wet coking car (two coke tank cars) to transport red coke. 4.2 A motorcar is mainly composed of a car body, a driver’s cab, running gear, braking equipment, an air system, an air conditioning system, an electrical system, etc. The vehicle body consists of a driver’s cab, an electrical compartment, a mechanical compartment, etc. 4.2.1 Mechanical design: The vehicle structure is designed using 3D simulation, ensuring accurate calculations. This ensures technical parameters such as a low center of gravity for the vehicle body and equal wheel pressure, thereby laying a solid foundation for smooth transmission and operation of the locomotive. Our company has designed two types of traveling drive mechanisms: shaft-enclosed type. The control room is located in the middle of the locomotive (it can be placed at the end upon the customer’s request), allowing safe passage through the wet coking tower and other components on the coke side. On the motorcar, access to the driver’s cab, electrical room, and mechanical room is possible through built-in corridors, with power slide contacts located near the coke side. 4.2.2 Electrical design: Centralized control is achieved using Siemens’ PLC as the core, with distributed control facilitated through a network, enabling all functions specified in the requirements document. This solution features a hot standby configuration using Siemens S7-400 PLCs; this model is a high-end product. Industrial computers are also arranged in a hot standby setup with dual networks, thereby ensuring more reliable operation. The uninterruptible power supply UPS ensures 30 minutes of backup in case of a power outage. Its powerful capabilities and high processing speed are sufficient to ensure that users can undergo future technical upgrades without the need to replace hardware. It adopts centralized PLC control, featuring simple wiring, few failure points, and easy maintenance; the use of a network further enhances these advantages. The operation mode supports manual control as well as unit program control (automatic unit operation), and interfaces related to dry quenching operations are provided on this basis. 5. Main technical features: In addition to the functions of a regular motorcar, this motorcar also possesses the following technical features: 5.1 The motorcar is designed with a low center of gravity, ensuring smooth operation. 5.2 The vehicle body portion above the motorcar trolley frame can be lifted as a whole, facilitating the maintenance of the trolley. 5.3 The motor car is equipped with an internal staircase; the driver accesses the cab via an internal corridor on the upper platform, with the entrance located on the machine side to ensure easy and safe access. 5.4 Transmission system: Built-in shaft-clutch transmission, dual-drive transmission. It has a compact design; the reducer is mounted around the shaft, located between the two wheels beneath the trolley, and can rotate synchronously with the shaft. The motor is rigidly installed on the frame and connected flexibly to the reducer. This structure eliminates completely any drawbacks caused to the transmission mechanism by vehicle oscillations resulting from uneven tracks, **increasing the service life of the gears. The reducer is installed between the two wheels beneath the trolley; the transmission mechanism offers excellent strength. It is manufactured using a hard-tooth surface grinding process, ensuring that no major repairs are required for the reducer over a period of five years ； The disc caliper brakes installed on the side of the motor car facing the coke are pneumatic normally open brakes that serve both as primary brakes and as alignment brakes; they are easy to adjust and provide accurate positioning. Axle box: An articulated, swinging spring-damped self-centering axle box is used. It enables the motor vehicle to operate smoothly and reliably during starting and braking, which facilitates its precise positioning. 5.5 Braking System The braking system consists of energy-consuming (inverter-generated) braking, air disc braking, and air brake pads for coke cars; it features compressed air braking controlled by electrical commands, thereby ensuring more stable operation. This locomotive design takes full account of emergency measures in case of failures during production, to ensure the smooth operation of production. The braking system is equipped with a foot brake, which allows for emergency braking in the event of a failure in the electrical system. 5.6 The driver’s cab features a fully sealed and insulated structure to ensure a clear view for the driver; it is equipped with an operation console, air conditioning units (capable of both cooling and heating), industrial television, and other devices. Hollow channels are provided at the bottom and along the walls to facilitate the installation of concealed wires and maintenance, thus ensuring ease in electrical wiring. Anti-slip, flame-retardant, wear-resistant, and insulated floor coverings are installed on the indoor floors. The cab features a user-friendly design, with tempered glass that provides insulation. The control panel is managed in separate zones for electricity and gas; real-time alarms are issued at each fault point to alert the driver. Inside the vehicle, there are also two compartments: an electrical compartment and a mechanical compartment. The electrical room is a sealed and insulated structure, with its inner walls made of galvanized steel plates. It houses an electrical control cabinet and a valve station, and it has a removable lid and hollow passages at the bottom to facilitate the maintenance of the motors. An air compressor is installed inside the machine room. There is a maintenance access hole on the top of the two chambers. 5.7 Air Supply System 5.7.1 Air Compressor: The air supply system of this motor car is equipped with a high-performance, low-noise screw air compressor with a capacity of 2.0 m3/min. The air compressor is installed in a **mechanical room**, ensuring that it operates in a clean environment to extend its service life. 5.7.2 In the pneumatic control system, an oil-water separator and filters are installed between the two air storage tanks with a total volume of 2.0 m3 and the air compressor; these components filter out moisture, oil, and dust from the air, ensuring that the pneumatic control system can function properly in the harsh conditions of the coke oven area. 5.8 Air Conditioning System 5.8.1 Both the driver’s cab and the electrical room are equipped with metallurgical high-temperature resistant air conditioning systems, which enable the driver to work in a suitable temperature environment and also help reduce electrical failures. 5.8.2 To facilitate the maintenance of the air conditioner, its outdoor unit is installed outside. 5.9 The surface of the motor car is coated with fluorocarbon paint. Bright, attractive, heat-resistant, corrosion-resistant, self-cleaning, crack-free, non-falling off, and durable. The rest shall be carried out according to the buyer’s requirements. 5.10 Characteristics of electrical control design: