Guanhua

Products

Rail Transit Guanhua

Housing

Rail Transit

Housing

Our company specializes in the R&D, production, and manufacturing of sheet metal components for rail transit vehicle enclosures. Our core products cover four major series: high and low voltage end boxes, air conditioning control cabinets, traction boxes, and sheet metal assemblies for onboard air conditioning units. All products strictly comply with rail transit industry standards and the customized requirements of Chongqing Light Rail. They are fabricated using high-quality base materials such as high-strength aluminum alloy, cold-rolled steel plates, and stainless steel plates, through precision laser cutting, CNC bending, welding, and multiple anti-corrosion treatment processes. The products feature light weight, high protection, and stable structural performance. They are widely adaptable to complex installation environments such as underfloor and interior spaces of rail vehicles, providing solid and reliable sheet metal structural support and protection for the safe transmission of train electrical systems, efficient drive of traction systems, and stable operation of HVAC systems. Our company is a high-quality supplier of core auxiliary components for Chongqing Light Rail vehicles.

CLASSIFICATION

Product

categories

Sheet metal assembly for onboard air conditioning units

It covers a full range of components including the air conditioning unit housing, air duct chambers, mounting frames, and access panels, serving as the core structural foundation of the onboard AC system. The streamlined air duct optimization design reduces air resistance and noise while improving heat exchange efficiency. The lightweight design effectively lowers the vehicle body load, and the IP54 protection rating prevents the ingress of moisture and dust. The modular structure, combined with quick-disconnect interfaces, greatly enhances operation and maintenance convenience, providing comprehensive support for the efficient operation of the air conditioning system.

High and low voltage end boxes

As the core sheet metal hub of the train's electrical system, the product features a high/low voltage zone isolation design and achieves an IP54 or higher protection rating. It efficiently integrates core components such as power distribution, circuit protection, and signal transmission, perfectly adapting to the complex underfloor space. It withstands vibration, humidity, heat, dust, and other harsh conditions, ensuring the safe and stable operation of the train's traction, braking, and auxiliary power supply systems.

Air conditioning control cabinet

The air conditioning control cabinet realizes control over various operating modes of the urban rail transit vehicle's air conditioning system, including heating, ventilation, and cooling, through the control circuit and the air conditioning controller (which consists of core control components such as a PLC, touch screen, and MVB gateway). It also enables various software and hardware protection functions for the air conditioning system, making it an important part of the overall system.

The cabinet body of the air conditioning control cabinet adopts an aluminum alloy/stainless steel riveted or welded structure, featuring robustness, compactness, and ease of maintenance.

Traction box

A key sheet metal load-bearing component of the train's power system, specifically designed for core power components such as traction converters and controllers. The product features high structural strength, excellent vibration resistance, and undergoes multiple anti-corrosion treatments, making it suitable for harsh underfloor operating environments. Its precision machining accuracy ensures stable installation of power components, providing solid support for the train's efficient traction and reliable operation.

TECHNICAL

Technical

support

Mass customization manufacturing support

Leveraging high-precision sheet metal processing and modular assembly technology, we can achieve mass production of various types of enclosures, including high/low voltage end boxes, air conditioning control cabinets, and traction boxes, to meet the supporting needs of different vehicle types such as subways, light rail trains, and EMUs. Customization of enclosure structures and internal layouts is supported based on vehicle dimensions, installation space, and functional requirements.

Integrated electrical design and integration services

The R&D team, leveraging customer-specific onboard electrical system parameters, can provide integrated layout design of enclosures and internal components, as well as thermal optimization solutions. They also support protection rating upgrades (IP65+), electromagnetic compatibility (EMC) shielding design, and customized anti-corrosion processes, all tailored to the complex operating environment of rail transit.

Full-scenario reliability quality control

A full-process quality control system has been established, ranging from inspection of sheet metal base materials and verification of welding/assembly processes to full-performance testing of finished products, covering stringent rail transit industry test standards such as voltage withstand insulation, vibration and shock, temperature cycling, and salt spray corrosion, ensuring long-term stable operation of the products.

Resolution of technical challenges under special operating conditions

We can assist customers in resolving core pain points of enclosures in rail transit scenarios, such as wiring optimization in confined spaces, improving heat dissipation efficiency under high-temperature environments, structural reinforcement and sealing/leakage prevention under vehicle vibration, and achieving a balanced design between lightweight and high strength.