China Railway Heavy Industry obtained patents related to hydraulic breakers, with hydraulic breaker module connections designed for convenient disassembly and maintenance.

March 21 News: According to the China National Intellectual Property Administration, China Railway Construction Heavy Industry Group Co., Ltd. has applied for a patent titled “Hydraulic Impactor,” with authorization announcement number CN224002655U, granted on March 17, 2026. The application number is CN202520894846.8, with publication date March 17, 2026, and filing date May 7, 2025. Inventors include Xu Aifeng, Yida Yun, Xiao Zhenghang, and Gan Shiyu. The patent agency is Beijing Tongli Juncheng Intellectual Property Agency Co., Ltd., with patent agents Zhou Hui and Wen Xiaoli. The classification codes are E21B1/26 and E21B7/02.

Patent Abstract: The application relates to a hydraulic impactor in the field of drilling equipment, comprising a drill bit tail, and sequentially connected front guide module, gear box module, and impact flow module. The front guide module includes a front guide shell with a through first cavity; the gear box module includes a gear box shell and a rotating component, with a second cavity through the gear box shell; the impact flow module includes an impact flow shell and impact components, with a third cavity. The two ends of the gear box shell are detachably connected to the front guide shell and impact flow shell. The first, second, and third cavities are coaxially aligned, with the inner diameters of the first and third cavities decreasing away from the gear box module, allowing maintenance of internal parts by disassembling only one module when servicing the hydraulic impactor.

China Railway Construction Heavy Industry was established on November 23, 2006, and listed on the Shanghai Stock Exchange on June 22, 2021. Its registered and office address is in Changsha, Hunan Province. It is a leading domestic manufacturer of high-end underground engineering equipment, with core products such as tunneling machines leading the industry and possessing full industry chain advantages.

The company’s industry classification is Mechanical Equipment - Engineering Machinery - Complete Engineering Machinery, involving concepts like railway infrastructure, government holdings, and state-owned enterprise reform. Its main business includes designing, developing, manufacturing, selling, leasing, and servicing tunneling equipment, rail transit equipment, and specialized machinery.

In 2025, China Railway Construction Heavy Industry achieved revenue of 10.045 billion yuan, ranking second among two industry companies, with the top-ranked Shantui Co., Ltd. earning 14.62 billion yuan. The industry average and median are both 12.333 billion yuan. The main business revenue was 9.972 billion yuan, accounting for 99.27%, with other (supplementary) income of 72.84 million yuan (0.73%). Net profit for 2025 was 1.483 billion yuan, ranking first in the industry; the second-ranked Shantui had a net profit of 1.214 billion yuan, with the industry average and median at 1.349 billion yuan.

Recent patent applications by China Railway Construction Heavy Industry include:

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