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Focusing on the technology and innovation is an important factor for Litian Heavy Industry to achieve a leading position in the rock drilling tool and rock breaking tool industry in just over a decade. Our R&D team is composed of product designers and product application experts, who are committed to continuously promoting the development of rock drilling technology and the improvement of rock drilling efficiency.
We work closely with our customers, and every problem and challenge in their operation is the driving force for our research and development and the source of innovation. For research and development, we will conduct a large number of tests in the laboratory and construction sites, and make improvements, and retests again and again according to the test results, until it succeeds.
We are serious about R & D for rock tools！
-Successively obtained patents-
No. | The Name of the Patent | Patent No. | Date |
1 | Welding device for disc cutter retaining ring of tunnel boring machine | ZL 2019 2 0963174.6 | 2020-03-27 |
2 | Tunnel boring machine disc cutter retaining ring | ZL 2019 2 0962528.5 | 2020-03-31 |
3 | Spreader for clamping TBM cutter ring | ZL 2019 2 0962596.1 | 2020-06-23 |
4 | Cutting device for replacing damaged disc cutter ring of tunnel boring machine | ZL 2019 2 0962515.8 | 2020-03-24 |
5 | Adjustable support device for hydraulic drill rod thread processing | ZL 2019 2 0962505.4 | 2020-03-24 |
6 | Hydraulic drill rod carburizing lifting device | ZL 2019 2 0962475.7 | 2020-03-31 |
7 | Heavy-duty TBM disc cutter ring | ZL 2019 1 0554897.5 | 2019-09-20 |
8 | Twin disc center cutter disassembling device of tunnel boring machine | ZL 2019 2 0963103.6 | 2020-04-17 |
9 | Locking block of TBM disc cutter | ZL 2019 2 0963105.5 | 2020-03-24 |
10 | Assembling guide cone device for TBM disc cutter retaining ring | ZL 2019 2 0962502.0 | 2020-03-24 |
11 | Wear-resistant TBM roller cutter structure | ZL 2016 2 1472381.4 | 2017-07-04 |
12 | Starting torque adjusting mechanism for TBM disc cutter | ZL 2016 2 1472705.4 | 2017-07-04 |
13 | Upper end cover removal device of TBM disc cutter | ZL 2016 2 1472384.8 | 2017-07-14 |
14 | Hoisting device of disc cutter hub of tunnel boring machine | ZL 2016 2 1472366.X | 2017-11-28 |
15 | Disc cutter of shield machine | ZL 2016 1 1252233.6 | 2017-04-26 |
16 | Sealing ring seat disassembly device of TBM disc cutter | ZL 2016 2 1472702.0 | 2017-07-04 |
17 | Measuring gauge for wear of TBM cutter ring | ZL 2016 2 1472369.3 | 2017-07-04 |
18 | TBM disc cutter sealing structure | ZL 2016 2 1472695.4 | 2017-06-30 |
19 | Disassembly method of bearing outer ring of TBM disc cutter | ZL 2016 1 1252493.3 | 2017-08-18 |
20 | Sharp-edged TBM disc cutter structure | ZL 2017 2 1472385.2 | 2017-07-04 |
21 | Lubricating grease filling device for TBM disc cutter | ZL 2016 2 1472144.8 | 2017-07-04 |
22 | Hoisting device for disc cutter ring of roadheader | ZL 2016 2 1472368.9 | 2017-11-28 |
23 | Wear-resistant end cover of TBM disc cutter | ZL 2016 2 1472383.3 | 2017-07-04 |
24 | A new type of eccentric drill bit | ZL 2013 2 0191508.5 | 2013-09-11 |
Mar 09-2025
Why Choose T51 Drill Rods for Mining?
Litian is a professional manufacturer focused on the production of rock drilling tools and excavation tools.
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