On June 17, 2026, information from the State Intellectual Property Office showed that a patent titled “A pipe welding equipment for the production of coal shearers” applied by Linzhou Heavy Machinery Group Co., Ltd. was authorized. The authorization announcement number is CN224359641U, and the authorization announcement date is June 16, 2026.
The patent application number is CN202520879624.9, and the application date is May 7, 2025.
The patent summary shows that the pipe welding equipment used for the production of coal shearers involves the technical field of products made by brazing, welding or cutting.
It includes a workbench, a placement slot is provided on the upper side of the workbench, and the workbench extends from the front and rear sides of the placement groove. The workbench is also provided with two connecting grooves, which are respectively arranged on the left and right sides of the placement groove.
There are two limit chute inside the workbench, which are also respectively arranged on the left and right sides of the placement groove. The bottom walls of the two connecting grooves respectively extend into the interior of the two limit chute.
There are two fixing mechanisms and a control mechanism on the workbench.
Through this design, the thickness of the welding pipe can be adjusted, so that the welding equipment can be used in the production of different types of coal shearers, greatly increasing the scope of application of the welding equipment.
Linzhou Heavy Machinery was established on May 8, 2002 and listed on the Shenzhen Stock Exchange on January 11, 2011. Its registered address and office address are both in Henan Province.
The company is an important domestic enterprise in the field of fully mechanized coal mining machinery and equipment. It has strong technical strength and full industry chain advantages in coal-related equipment and services.
Linzhou Heavy Machinery’s main business covers the coal mining machinery and equipment sector, coal mine construction and other coal-related sectors, as well as oil and gas energy technical service business and high-end intelligent equipment business.
The company’s Shenwan industry is machinery and equipment – special equipment – energy and heavy equipment, and its conceptual sectors include micro-cap stocks, ultra-micro cap stocks, and low prices.
In 2025, Linzhou Heavy Machinery’s operating income was 1.128 billion yuan, ranking 32nd among the 58 companies in the industry, far lower than the industry first place of 41.354 billion yuan and the second place of 36.26 billion yuan. The industry average was 4.515 billion yuan, and the median was 1.159 billion yuan.
Among the main business components, coal machinery revenue was 975 million yuan, accounting for 86.41%.
The net profit was -46.6751 million yuan, ranking 52 in the industry. There was a clear gap with the first place of 4.357 billion yuan and the second place of 3.788 billion yuan. The industry average was 309 million yuan and the median was 91.3369 million yuan.
Linzhou Heavy Machinery Group Co., Ltd. has a rich patent situation recently, involving various types of equipment and processes.
For example, there are invention patents such as “an automated zinc spraying production line for hydraulic support structural parts” and “an integrated casting method based on in-situ synthesis of 3DP sand molds and wear-resistant layers”, as well as utility model patents such as “a vibration and noise reduction device for a new coal shearer electronic control system” and “an explosion-proof coal shearer motor electronic control device”.
These patents reflect the company’s active investment and innovation capabilities in technology research and development, and provide strong technical support for the company’s development in the industry.
