Gate type rapid locking device

Abstract

The invention provides a gate type rapid locking device. The gate type rapid locking device comprises a left baffle and a right baffle which are arranged side by side in the vertical direction in a front-back mode, the middle of the left baffle is provided with a left through hole, the middle of the right baffle is provided with a right through hole, the left through hole and the right through hole are symmetrical, the edge of the left through hole is welded to the right end of a left rapid connection pipe, the edge of the right through hole is welded to the left end of a right rapid connection pipe, a gate is inserted in a cavity between the left baffle and the right baffle in a clearance fit mode, the upper portion of the left baffle and the upper portion of the right baffle are fixedly connected to the bottom of the gate through two bolts, and a seal leak-proof pin shaft is arranged in the lower portion of the cavity in the front-back horizontal direction. The gate type rapid locking device can be used repeatedly, is beneficial to construction, can guarantee that concrete poured into a tube of a concrete-filled steel tube support is plenty and voidless, makes the supporting intensity of the concrete-filled steel tube support meet design requirements, and prevents the concrete-filled steel tube support from deforming in the use process.

Description

technical field [0001] The invention relates to a gate type fast locking device. Background technique [0002] The Longkou mining area is a well-known difficult area for soft rock support in the country. The geological conditions in the expanded sea area of ​​the Beizao Coal Mine are more complex, and the physical and chemical properties of rocks in each layer are weakened compared with the land area. The mining area in the expanded sea area is mainly concentrated in the oil-bearing mudstone on the roof. The commonly used support form for this layer is the U36 steel shed wall post-casting support method. The support strength requirements cannot be met within the influence range of dynamic pressure. In order to increase the support strength, it is necessary to use concrete-filled steel tube supports. The high-strength bearing capacity of steel tube concrete supports has obvious advantages in the support of soft rock mines, and is a stable area of ​​local high stress concentra...

AI Technical Summary

Problems solved by technology

However, after pouring the concrete-filled steel pipe support, when disassembling the joint between the concrete delivery pump and the concrete-filled steel pipe support, the concrete in the pipe will flow out along the mouth of the pipe due to the inability to seal the joint between the concrete delivery pump and the concrete-filled steel pipe support. When there is a gap, when the roadway is under pressure, the gap becomes the weak point of the force, and the phenomenon of stress concentration occurs, which leads to the deformation of the steel tube concrete support

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