In May 2026, information from the State Intellectual Property Office showed that a patent called “Cutting Head Device and Coal Shearer” applied by China Railway Construction Heavy Industry Group Co., Ltd. was authorized. The authorization announcement number was CN119466768B. The authorization announcement date was May 5, 2026.
The application publication number is CN119466768A, the application number is CN202411778492.7, the application publication date is May 5, 2026, and the application date is December 4, 2024.
The patent summary shows that this cutting head device belongs to the field of mining equipment technology.
It includes a machine body, at least two machine arms and at least two cutting heads. The at least two machine arms are arranged at intervals along the vertical direction. The first end of each machine arm is swingably connected to the front end of the machine body, so that the second end of each machine arm can swing in the vertical plane; at least two cutting heads are respectively connected to the second end of each machine arm, and in the vertical downward direction, the distance between each cutting head and the machine body gradually decreases.
By adding a machine arm and cutting head, the device improves mining efficiency.
At the same time, by adjusting the distance between each cutting head and the machine body, steps can be formed on the coal seam during the coal mining process, thereby reducing the height difference when damaged coal materials fall downward, reducing the splash distance of coal materials, and making coal materials easier to collect.
Railway Construction Heavy Industry was established on November 23, 2006 and listed on the Shanghai Stock Exchange on June 22, 2021. Its registration and office address are Changsha, Hunan Province.
It is a leading high-end equipment manufacturing enterprise in China, focusing on tunnel boring machines and other equipment, and has the advantages of the entire industry chain and strong technical strength.
Shenwan Industry, a subsidiary of China Railway Construction Heavy Industry, covers machinery and equipment – engineering machinery – complete engineering machinery, involving conceptual sectors such as deep-sea economy, low prices, and Xinjiang revitalization.
The company is mainly engaged in the design, research and development, manufacturing, sales, leasing and service of boring machine equipment, rail transit equipment and special professional equipment.
In 2025, the operating revenue of China Railway Construction Heavy Industry will reach 10.045 billion yuan, ranking 8th among the 23 companies in the industry, far lower than the 100.823 billion yuan of XCMG Machinery, the first in the industry, and the 89.231 billion yuan of Sany Heavy Industry, the second place. It is lower than the industry average of 16.765 billion yuan, but higher than the industry median of 6.689 billion yuan.
Among the main businesses, tunnel boring machines accounted for 56.64%, reaching 5.689 billion yuan.
In terms of net profit, it will be 1.483 billion yuan in 2025, ranking 6th in the industry, lower than the 8.488 billion yuan of the first Sany Heavy Industry and the 6.686 billion yuan of the second XCMG Machinery, slightly higher than the industry average of 1.362 billion yuan, and far exceeding the industry median of 530 million yuan.
China Railway Construction Heavy Industry Group Co., Ltd. has recently applied for a number of patents, covering a variety of different technical fields and equipment types, such as large-flow mud circulation systems and slag discharge methods for super-large cross-section shaft construction, steel-concrete composite segment support open rock tunnel boring machines, etc.
The application and research and development of these patents demonstrate China Railway Construction Heavy Industry’s continuous investment and active exploration in technological innovation, and are expected to provide strong technical support for the company’s future development and contribute to the technological progress of the entire industry.
