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    • 13. 发明授权
    • Hydraulic steel mine prop
    • 液压钢矿
    • US5205676A
    • 1993-04-27
    • US781223
    • 1992-01-06
    • Robert W. Heiliger
    • Robert W. Heiliger
    • E21D15/44
    • E21D15/44
    • A hydraulic steel mine prop having a bottom ram including an outer cylindrical tube with a cylinder foot at one end and a collar ring at the other end, and with a top ram coaxially guided in the bottom ram. The top ram is substantially a cylindrical tube with a piston at its one end, whereby the piston is guided in and sealed relative to the inner wall of the outer cylindrical tube, and with a prop head at its other end. The top ram includes an inner prop extension stop and a return spring formed as a screw spring which is secured with one end to the prop head and with the other end to the cylinder foot. The return spring passes through a bore in the piston, whereby a further tube which encloses the spring, is arranged coaxially between the prop head and the piston. The piston includes a safety valve which relieves the pressure from a compression chamber when the piston assumes a predetermined end position. To simplify operating the safety valve in a positive manner the screw spring is divided into two separate spring members.
    • PCT No.PCT / EP91 / 00706 Sec。 371日期1992年1月6日 102(e)日期1992年1月6日PCT 1991年4月13日PCT PCT。 WO91 / 18186 PCT公开号 日期:1991年11月28日。一种具有底部柱塞的液压钢矿井支柱,该底部压头包括在一端具有气缸底部的外圆柱形管和另一端的套环,并且具有在底部压头中同轴引导的顶部压头。 顶部冲头基本上是一个圆柱形管,其一端具有活塞,由此活塞被引导并相对于外圆柱形管的内壁被密封,并在其另一端具有支柱头。 顶部压头包括内部支撑延伸止动件和形成为螺钉弹簧的复位弹簧,螺钉弹簧的一端固定到支柱头部,另一端固定到气缸脚部。 复位弹簧通过活塞中的孔,由此将包围弹簧的另一个管同轴地布置在支柱头和活塞之间。 活塞包括安全阀,当活塞呈现预定的终止位置时,该安全阀可以减轻来自压缩室的压力。 为了简化安全阀的操作,螺杆弹簧被分成两个单独的弹簧部件。
    • 15. 发明授权
    • Shield supports suitable for use in mines
    • 盾牌支架适用于矿山
    • US4629368A
    • 1986-12-16
    • US698602
    • 1985-02-05
    • Nigel Hill
    • Nigel Hill
    • E21D23/04E21D15/44E21D19/00
    • E21D23/0427
    • A shield support, suitable for use in mines, comprising a floor-engaging structure, a roof-engageable canopy, extendible and contractible prop means disposed between the floor-engaging structure and the canopy, and a shield assembly pivotally-connected to the canopy at or near its rearward end portion. The shield assembly includes a lazy tongs linkage, one element of which is pivotally-connected directly to the floor-engaging structure and another element of which is pivotally-connected to the floor-engaging structure through the intermediary of a further element.
    • 适用于矿山的护罩支架,包括设置在地板接合结构和罩之间的地板接合结构,屋顶可接合的顶篷,可伸缩和可收缩的支撑装置,以及屏蔽组件,该屏蔽组件枢转地连接到顶篷 或靠近其后端部分。 屏蔽组件包括一个懒惰的钳子连接件,其一个元件直接枢转地​​连接到地板接合结构,另一个元件通过另一个元件枢转地连接到地板接合结构。
    • 16. 发明授权
    • Mine roof support system
    • 矿山屋顶支撑系统
    • US4552488A
    • 1985-11-12
    • US457424
    • 1983-01-12
    • Peter Elliott-Moore
    • Peter Elliott-Moore
    • E21D23/16E21D15/44E21D23/26
    • E21D23/16Y10T137/7905
    • A mine roof support system including a relief valve communicable with the props of each roof support through respective control valve means, and a main return pipe for receiving liquid discharged, by way of the relief valve, from the props when liquid at high pressure is no longer supplied thereto and the roof support is being advanced. A movable element of the relief valve comprises at least two relatively-movable and connected parts and is so co-operable with its seating as to ensure that when the support is so advancing a substantially constant predetermined back-pressure is maintained in the props sufficient to maintain the support in contact with the mine roof. If the pressure in the main return pipe exceeds the pressure then subsisting in the control valve means, one of the parts of said element is caused automatically to close onto the seating.
    • 一种矿山屋顶支撑系统,包括通过相应的控制阀装置与每个屋顶支撑件的道具可通信的安全阀;以及主回流管,用于当高压液体为高压时,通过溢流阀接收从道具排出的液体 更长时间地供应并且屋顶支撑件正在进行。 安全阀的可移动元件包括至少两个相对可移动和连接的部件,并且与其座部可共同操作,以确保当支撑件如此前进时,支撑件中保持基本上恒定的预定背压足以 保持与矿山屋顶的接触。 如果主回流管中的压力超过控制阀装置中的压力,则所述元件的一部分被自动地关闭到座上。