The first phase of Lan 'Zhou City Rail Transit Line 1, my country's first rail transit line under the Yellow River, which has attracted much attention from all walks of life, was officially opened for trial operation on June 23. The project is also the first rail transit line in Gansu Province. Line 1 starts from Donggang, Chengguan District in the east and ends at Chenguanying, Xigu District in the west. It is the backbone line of Lanzhou's rail transit line network and the main east-west transportation line of the city. It connects Chengguan District, Qilihe District, Anning District, and Xigu District in series. The main line of the entire line is about 25.9 kilometers long, all underground lines, with a total of 20 stations and a total investment of 19.816 billion yuan.

As an important backbone of urban public transportation, Lan 'Zhou City Rail Transit Line 1 is of great significance for improving urban functions, saving urban space, alleviating urban traffic congestion, enriching citizens' travel methods, promoting economic and social development, and enhancing Lanzhou's city image.

The Weiman Door Industry Rail Transit System Opening Solution provides wind-resistant and fire-proof doors for the section communication channel for the Lan 'Zhou City Rail Transit Line 1 project. As an important facility installed in the tunnel, the fire door of the section communication passage is subject to the reciprocating action of the train piston wind pressure for a long time. It is very easy to be damaged, and even falls off and intrudes into the train operating limits, threatening the operation safety of urban rail transit.

The wind-resistant fire door products provided by Weiman Door Industry and Asa Abloy for Lan 'Zhou City Rail Transit Line 1 are suitable for subway communication channels and occasions with wind-resistant requirements. The product adopts a strengthened design, and the door frame adopts a double-layer composite structure, which has good overall strength and is not easy to deform. The door leaf is a combined armored structure with strong overall deformation resistance and overcomes the damage to the door caused by the alternating wind pressure in the subway tunnel.

At the same time, the hardware accessories of the product have also been optimized and specially designed to meet the special requirements for wind pressure resistance in subway tunnels. Relevant hardware parts strictly follow the principles of high quality, high safety and ease of use, and are configured and selected according to the basic functions of suspension, locking, control and protection. ANSI American standard products, the highest standard for hardware standards, are selected:

In order to ensure the firm connection between the door body and the door frame, the product adopts American Standard heavy-duty door shaft connection.

In order to ensure that the door is locked without being blown open by strong piston wind, and considering the dusty use environment in the section, an open-mounted multi-point locking escape lock is used to ensure effective locking.

The door closer is made of ANSI A156.4, the highest standard for hardware, to meet its continuous opening life requirements and harsh environment use requirements.

Through comprehensive technical solution cooperation in the project and advisory service support in the project, Weiman Doors has been recognized by relevant departments of Lanzhou Metro for its high-quality products and services to protect passenger safety.

In the field of rail transit, Weiman Doors has rich project experience and a complete range of product lines. In terms of door type configuration and accessory selection, it conducts technical research and development and improvement closely around the actual needs of the rail transit environment. It provides this market segment with a series of products including fire doors, fire and smoke doors, fire and closed doors, fire and sound insulation doors, wind pressure resistant fire doors, emergency escape doors, steel interior doors, roller shutter doors, door control hardware and other products.

At present, the company has cooperated with many domestic rail transit systems, such as: Nanjing Metro Line 3, Nanjing Metro Line 4, Nanjing Ninggao Line S9, Shanghai Metro Line 5 South Extension Line, Changzhou Metro Line 1, Chongqing Rail Line 5, Chongqing Rail Line 10, Fuzhou Metro Line 2, Lanzhou Metro Line 1, Xuzhou Metro Line 1, Hohhot Metro Line 1, etc.