| 摘要 |
An H-beam withdrawing apparatus used for constructing an earth wall is provided to compress the H-beam firmly and to protect the wedge operating hydraulic cylinders by changing an angle of two operating wedges according to the inclined angle of the H-beam. An H-beam withdrawing apparatus used for constructing an earth wall comprises a base body, and a withdrawing operation body. A cylinder body has two main lifting cylinders, two wedge guiders, two operating wedges for withdrawing the H-beam by compressing two surfaces of the center connection part of the H-beam, and two wedge operating hydraulic cylinders. The H-beam withdrawing apparatus includes two auxiliary lifting cylinders(8a,8b), an auxiliary withdrawing casing(82), two operating links, and two auxiliary wedges. The auxiliary lifting cylinders are vertically standing-installed to front and rear sides of the upper surface of the withdrawing operation body. The auxiliary withdrawing casing is formed with H-beam receiving holes(82a), and lifted up and down according to the appearance and disappearance of piston rods(81). The operating links are installed to be rotated on a fixing pin shaft. The auxiliary wedges withdraw the H-beam by compressing two surfaces of the center connection part of the H-beam. |
