首页>
外国专利>
Hydraulic telescopic concrete mine support column formwork - has diametrally opposite piston units clamped to top and bottom half shells
Hydraulic telescopic concrete mine support column formwork - has diametrally opposite piston units clamped to top and bottom half shells
展开▼
机译:液压伸缩式混凝土防雷柱模板-径向相对的活塞单元固定在上半壳和下半壳上
展开▼
页面导航
摘要
著录项
相似文献
摘要
Two telescoping tubular formwork housing units, with the bottom one supporting a hydraulic thrust-piston assembly, in contact with the roof, for the top one, make up a mechanism for erecting a concrete or similar pillar-type support in a mine. Both bottom and top housing units are in the form of open-ended interconnectable half-shells. Two diametrally opposed hydraulically activated piston assemblies are clampable, by means of hinge plates on the bottom unit for the cylinders and on the top unit for the piston rods. A number of axially spaced grooves may be worked in the upper units periphery.
展开▼