Double-backfill type concrete vibrating rod capable of draining and refining

Abstract

The invention discloses a double-backfill type concrete vibrating rod capable of draining and refining and belongs to the field of concrete vibrating rods. In the vibrating process, negative air pressure is formed, so that concrete and air in the concrete are sucked into a straight cylinder; after the air is exhausted, the concrete is extruded out of the straight cylinder; in this process, on onehand, air in concrete is effectively exhausted through a suction type method; on the other hand, the flowability of concrete is accelerated, so that air, which is not sucked into the straight cylinder, in the concrete also escapes in an accelerated manner due to the flowing of the concrete; therefore, the vibrating effect of the concrete is effectively improved; furthermore, after the vibration isfinished; since a free deformation sleeve is automatically shrunk and refined, the size of the space formed when the free deformation sleeve is drawn out is effectively reduced, the backfill space ofconcrete is effectively reduced, meanwhile, the adsorption force of negative air pressure is matched, the backfill speed of the concrete is increased, the space formed when the free deformation sleeve is drawn out is fully and rapidly filled with the concrete, and the compactness of the concrete is improved.

Description

technical field [0001] The invention relates to the field of concrete vibrating rods, in particular to a dual backfilling concrete vibrating rod capable of drainage and refinement. Background technique [0002] When pouring concrete, it is generally necessary to use a plug-in vibrating rod for vibration. The purpose is to vibrate, and the air in between will rise and discharge along the periphery of the vibrating rod and pass through the concrete layer, so that the concrete will be densely combined and the honeycomb surface of the concrete will be eliminated. to increase its strength. [0003] When using a plug-in vibrator, it should be inserted quickly and pulled out slowly. The insertion points should be evenly arranged, moved point by point, and carried out in sequence, without omission, so as to achieve uniform vibration. The moving distance is not more than 1.5 times of the working radius of the vibrating rod (generally 30-40cm). When vibrating the upper layer, insert...

AI Technical Summary

Problems solved by technology

[0005] However, when the vibrator is pulled out, even if the "slow pull" is achieved, it is easy for the concrete not to fill the space drawn out by the vibrator, resulting in voids in the concrete, and during the concrete vibration process, due to the air in the concrete The discharge speed is slow, and some air bubbles are not discharged in time, and stay inside the concrete, forming voids, which also affects the compactness of the concrete

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