An auto-joint pre-stressed metal top beam

The utility model discloses an auto-joint pre-stressed metal top beam which comprises a main plate, an auxiliary plate and a positioning plate. The section structure of the auto-joint pre-stressed metal top beam sequentially includes the main plate, the auxiliary plate and the positioning plate; the...

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Bibliographic Details
Main Author SUN QIJUN
Format Patent
LanguageChinese
English
Published 09.09.2009
Subjects
EARTH DRILLING
FIXED CONSTRUCTIONS
GALLERIES
LARGE UNDERGROUND CHAMBERS
MINING
SHAFTS
TUNNELS
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Summary:The utility model discloses an auto-joint pre-stressed metal top beam which comprises a main plate, an auxiliary plate and a positioning plate. The section structure of the auto-joint pre-stressed metal top beam sequentially includes the main plate, the auxiliary plate and the positioning plate; the main plate, the auxiliary plate and the positioning plate are fixedly connected into a whole through rivets. The length of the main plate is more than the length of the auxiliary plate; the left part of the main plate gradually bends upwards and the left end part tilts up and is provided with a recovery hole. The length of the auxiliary plate is less than the length of the main plate; the left part of the auxiliary part bends upwards gradually along with the main plate. The width of the auxiliary plate is less than the width of the main plate. The length of the positioning plate is less than the length of the auxiliary plate; the width of the positioning plate is also less than the width of the auxiliary plate; mo
Bibliography:Application Number: CN20082211665U