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    • 7. 发明申请
    • 一种液压支架
    • WO2006076828A1
    • 2006-07-27
    • PCT/CN2005/000090
    • 2005-01-21
    • 李泽宇李薇薇
    • 李泽宇李薇薇
    • E21D17/01
    • E21D17/003E21D17/01
    • The utility model relates to a hydraulic roof support, comprising a left top beam (2), a right top beam (4), connecting means (5), hydraulic props (3), pushing oil cylinder (12) between the two top beams, wherein the pushing oil cylinder (12) is articulated to the connecting means (5) at one end and articulated to the rear end of the right top beam (4) at the other end, the connecting means (5) is articulated to the right side of the left top beam (2) at the one end, and the other end of the connecting means (5) may side along the inner side of the right top beam (4) by means of the sliding block (15). This kind of hydraulic roof support can prevent the top beams from tipping over when supporting the irregular or soft roof, so it is beneficial to the production safety. Moreover, this kind of hydraulic roof support is simple in structure, light in weight, low in cost, easy to assemble and disassemble, convenient to operate. It can be used as supporting apparatus at the working face under the coal mine, especially at the working face having soft roof and the cave-in coal working face having the big change in coal thickness.