| 摘要 |
FIELD: construction. ^ SUBSTANCE: invention pertains to the field of mining engineering and construction, in particular to excavation works under sunken pipes for removal of earth from under the sunken pipe, laid underground close to its surface. System of earth excavation from under the sunken pipe contains a pair of rotating cutting mechanisms withhold with a possibility of a hold fasting from above of the laid underground pipe. Each of the rotating cutting mechanisms contains a cylindrical supporting case resting on the main frame of the system and a cutting drum withhold by the above said supporting case with a slewing capacity. The system contains driven motor actuating rotating cutting mechanism set inside the supporting case and a gear reducing device connected with the driven motor and set in the cutting drum. ^ EFFECT: creation of compact system for earth excavation from under the sunken pipe, securing motors protection and having firm and stable design. ^ 8 cl, 12 dwg |
