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1.发明授权Devices for limiting the stroke of a hydraulic ram used in mining apparatus 失效用于限制采矿设备中使用的液压油缸行程的装置
公开(公告)号：US4379424A
公开(公告)日：1983-04-12
申请号：US158628
申请日：1980-06-11
IPC分类号： F15B15/24
CPC分类号： F15B15/24 , Y10T403/12
摘要： A device for limiting the stroke of a hydraulic ram of mining apparatus employs a segmental stop which partly surrounds the piston rod of the ram. The stop locates between the cylinder of the ram and a head piece at the end of the piston rod. The cylinder of the ram makes contact with the stop during retraction of the ram thereby limiting the stroke of the ram. The stop is connected to the head piece via replaceable or adjustable pins. These pins permit the distance between the head piece and the stop element to be altered at will. The connection pins also enable the stop to be arranged to partly surround the piston rod periphery over different regions thereof.
摘要翻译： 用于限制采矿设备的液压柱塞的行程的装置采用部分地围绕柱塞的活塞杆的节段停止。 止动件位于柱塞的气缸和活塞杆端部的头部件之间。 在压头的回缩过程中，冲头的气缸与止动件接触，从而限制冲头的行程。 止动器通过可更换或可调节的销连接到头部件。 这些销允许头部件和止动件之间的距离随意改变。 连接销还使得止动件能够布置成在其不同区域上部分地围绕活塞杆周边。
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公开(公告)号：US3983789A
公开(公告)日：1976-10-05
申请号：US541312
申请日：1975-01-15
申请人： Jurgen Dodt , Harry Rosenberg , Karl-Heinz Plester
发明人： Jurgen Dodt , Harry Rosenberg , Karl-Heinz Plester
CPC分类号： F16J15/002 , E21D15/44 , F15B15/16 , F16J15/32
摘要： A three-stage hydraulically-operated telescopic prop is disclosed having working chambers which can be charged with hydraulic pressure fluid to extend a central prop member relative to an outer prop member and an inner prop member relative to the central member. A pressure-operated spring biased non-return valve is operated by pressure to open communication between the working chambers to extend the inner member once the central member has been fully extended. The valve is also operated mechanically to open communication between the working chambers to allow retraction of the inner member when the central member has been retracted to a certain extent. Further chambers are provided between the central and outer member, and between the central and inner member, and these chambers can be charged with hydraulic pressure fluid to retract the central member relative to the outer member and the inner member relative to the central member. Guide bushings with sealing and/or packing rings are secured to the upper ends of the outer and central members to locate and guide the central and inner members during their movement.
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公开(公告)号：US4457212A
公开(公告)日：1984-07-03
申请号：US365467
申请日：1982-04-05
CPC分类号： E21D23/08 , E21B7/20 , E21F13/086 , F16C11/06
摘要： A hydraulic ram for use in thrust-jacking of tunnel linings comprises a cylindrical outer member, a cylindrical inner member reciprocable within the outer member, and an extension member reciprocable within the inner member. A two-part clamping ring is provided for releasably locking the extension member to the inner member. An auxiliary drive is provided for retracting the extension member rapidly within the inner member. The auxiliary drive may be a mechanical spindle drive, or a hydraulic drive having an auxiliary piston reciprocable within an axial bore formed in the extension member. The clamping ring comprises spring means for urging the parts of the clamping ring in to the closed position, and piston-and-cylinder means for urging the parts of the clamping ring apart, against the biasing force of the spring means, to open the clamping ring.
摘要翻译： 一种用于隧道衬里推力推顶的液压柱塞包括圆柱形外部构件，可在外部构件内往复运动的圆柱形内部构件和可在内部构件内往复运动的延伸构件。 提供两部分的夹紧环，用于将延伸构件可释放地锁定到内部构件。 提供辅助驱动器用于在内部构件内快速缩回延伸构件。 辅助驱动器可以是机械主轴驱动器，或具有可在形成在延伸构件中的轴向孔内往复运动的辅助活塞的液压驱动器。 夹紧环包括用于将夹紧环的部分推动到关闭位置的弹簧装置，以及克服弹簧装置的偏置力而使夹紧环的部分分开的活塞和缸体装置，以打开夹紧 环。
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公开(公告)号：US4449859A
公开(公告)日：1984-05-22
申请号：US384877
申请日：1982-06-04
摘要： A mineral mining installation includes a longwall conveyor and a plurality of roof support units positioned side-by-side on the goaf side of the conveyor. The conveyor is braced longitudinally by a block bracing system having a plurality of hydraulic bracing rams each of which is disposed at an acute angle to the conveyor. The bracing rams act between the conveyor and floor girders of the roof support units. Each bracing ram is attached to a respective floor girder by means of a bracket. Each bracket has first and second bracket parts welded together, the first bracket part comprising means for connecting the bracket to its floor girder, and the second bracket part forming an extension of the first bracket part and carrying a pivot joint member for pivotally supporting the cylinder of the associated bracing ram. The first bracket part is a standard cast member, to which second bracket parts of differing lengths can be welded.
摘要翻译： 矿物开采装置包括长边输送机和在输送机的侧壁上并排定位的多个屋顶支撑单元。 传送带通过具有多个液压支撑杆的块支撑系统纵向地支撑，每个液压支撑杆与输送机成锐角地设置。 支撑杆在屋顶支撑单元的输送机和地板梁之间起作用。 每个支撑柱通过支架连接到相应的地板梁上。 每个支架具有焊接在一起的第一和第二支架部分，第一支架部分包括用于将支架连接到其地板梁的装置，第二支架部分形成第一支架部分的延伸部分，并且承载枢转接头部件以枢转地支撑汽缸 的相关支撑压头。 第一支架部分是标准铸件，可以焊接不同长度的第二支架部件。
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公开(公告)号：US4549469A
公开(公告)日：1985-10-29
申请号：US548405
申请日：1983-11-03
CPC分类号： F15B15/2861
摘要： A hydraulic ram for use as an advance ram in mining operations has a plurality of permanent magnets embedded in its piston rod. At least one sensor is associated with a guide bush fixed to the piston rod end of the cylinder of the ram. The or each sensor is accommodated within a respective pocket formed in the guide bush. The pocket(s) can be closed off by a detachable closure member.
摘要翻译： 用作采矿操作中的推进柱塞的液压柱塞具有嵌入其活塞杆中的多个永磁体。 至少一个传感器与固定到柱塞的气缸的活塞杆端的导套相关联。 所述传感器或每个传感器容纳在形成在导向衬套中的相应凹部内。 口袋可以由可拆卸的封闭构件封闭。
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公开(公告)号：US4523512A
公开(公告)日：1985-06-18
申请号：US450611
申请日：1982-12-17
申请人： Heinz Hessel , Karl Heinz Plester
发明人： Heinz Hessel , Karl Heinz Plester
CPC分类号： F15B15/16
摘要： A telescopic prop for use in mine workings extends and retracts over three stages. The prop has an outer main base member 1 with respective first, second and third concentric inner members 2, 3, 4 disposed one within another. The first inner member has a piston 6 in which is arranged a non-return valve 23 which normally shuts off communication between a working chamber 20 associated with the first and base members and the working chambers 22, 27, 29 pertaining to the other members. A plunger 24 is provided to open the non-return valve when the first inner member is nearly fully retracted inside the base member so that after retraction of this stage the other stages can be retracted. The second or intermediate member also employs a piston 9 which is connected via a rod 13 with an auxiliary piston 15 disposed in a working chamber associated with the uppermost third member. The areas of the working faces of the respective pistons are designed so that the prop has a practically equal supporting force over the its entire range of displacement.
摘要翻译： 用于矿井作业的望远镜支撑在三个阶段延伸和缩回。 该支柱具有外主体部件1，其中相应的第一，第二和第三同心内部构件2,3,4一个设置在另一个中。 第一内部构件具有活塞6，其中布置有止回阀23，该止回阀23通常切断与第一和底部构件相关联的工作室20与与其它构件相关的工作室22,27,29之间的连通。 当第一内部构件几乎完全缩回到基座构件内部时，设置有柱塞24以打开止回阀，使得在该阶段缩回之后，可以缩回其他阶段。 第二或中间构件还采用活塞9，其通过杆13与设置在与最上面的第三构件相关联的工作室中的辅助活塞15连接。 各个活塞的工作面的区域被设计成使得支柱在整个位移范围内具有几乎相等的支撑力。
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公开(公告)号：US4227833A
公开(公告)日：1980-10-14
申请号：US1652
申请日：1979-01-08
CPC分类号： E21D23/086 , E21F13/10
摘要： A mineral mining installation comprises a longwall structure, such as a conveyor or a winning installation, and a roof support assembly constituted by a plurality of roof support units positioned side-by-side. At least some of the roof support units are provided with hydraulic bracing rams for bracing the longwall structure longitudinally. Each bracing ram is pivotally connected between the longwall structure and the floor sill of a respective roof support unit. Each ram is connected to its floor sill by connection means constituted by a bracket slidably mounted on that floor sill for movement towards, and away from, the longwall structure. Means are provided for securing each of the brackets to its floor sill in any one of a plurality of positions.
摘要翻译： 一种矿物开采设备包括诸如输送机或获胜设备的长壁结构，以及由并排定位的多个屋顶支撑单元构成的屋顶支撑组件。 至少一些屋顶支撑单元设置有用于纵向地支撑长壁结构的液压支撑柱塞。 每个支撑柱头枢转地连接在相应屋顶支撑单元的长壁结构和底板之间。 每个压头通过由可滑动地安装在该底板上的支架构成的连接装置连接到其底板上，以便朝向和远离长壁结构移动。 提供了用于将每个支架固定到多个位置中的任一个中的其底板的装置。
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