Packer for Repairing Crack in Concrete Body

Abstract

Disclosed is a packer for repairing a crack in a concrete body. The packer includes an injection main body and a soft sleeve. The injection main body includes an inflow route, a nipple part, a plurality of extension units, each of which has a trapezoidal section injection main body, and a backward flow prevention unit in the end of the inflow route opposite to the nipple part. The packer is obtained by assembling the soft sleeve with the extension units of the injection main body, and is installed along the crack of the concrete body, thus easily repairing the crack in the concrete body.

Description

TECHNICAL FIELD[0001]The present invention relates to a packer for repairing a crack in a concrete body, and more particularly to a packer for repairing a crack in a concrete body, which includes an injection main body including an inflow route formed therethrough in the longitudinal direction and a plurality of extension units, each having a trapezoidal section, consecutively formed at one end thereof, and a soft sleeve having a hollow formed therein corresponding to the shapes of the extension units and inserted into one end of the injection main body, in which, when the packer is inserted into the concrete body along the crack and a resin solution is injected into the injection mainbody, the injection main body is partially pushed out under the condition that the soft sleeve maintains its original position, and thus the soft sleeve is uniformly expanded in the circumferential direction, thus preventing the leakage of the resin solution.BACKGROUND ART[0002]Usually, concrete bodies...

AI Technical Summary

Benefits of technology

[0010]A packer for repairing a crack in a concrete body of the present invention includes an injection main body including an inflow route formed therethrough in the longitudinal direction, two extension units, each having a trapezoidal section, formed at a designated interval at one end of the injection main body, and a nipple part formed at the other end of the injection main body, and a soft sleeve inserted into the extension units, and is inserted into a fixing hole formed in the concrete body along the crack by drilling, in which the soft sleeve maintains its original position and the injection main body is partially pushed out when a resin solution is injected into the injection main body and is returned to a proper position when the injection of the resin solution is stopped, thus allowing the soft sleeve to be uniformly stuck to the fixing hole in the circumferential direction within the range where the concrete body is not damaged, preventing the resin solution from leaking through a gap between the packer and the fixing hole, and easily repairing the crack in the concrete body.

[0011]A backward flow prevention unit, including a spherical check ball and a compressed spring, is formed in the end of the injection main body opposite to the nipple part, thus preventing the injected resin solution from flowing backwardly due to the elasticity of the compressed spring. Since the backward flow prevention unit is inserted into the fixing hole, a portion of the packer, which protrudes from the surface of the concrete body, can be removed just after the resin solution is injected into the injection main body, and thus the packer shortens a time for repairing the crack in the concrete body and reduces labor costs.

[0012]The injection main body is integrally made of polycarbonate, and thus is easily cut and removed.

Problems solved by technology

Usually, concrete bodies are cracked due to various reasons, such as repetition of drying, shrinking, and freezing and melting of concrete, infiltration of salt water or acid materials and corrosion iron reinforcing rods.

Thus, such a packer elongates the construction time, and increase labor costs due to a post process.

Further, when the nut is excessively tightened, the rubber sleeve is bent and strains the concrete body.

Since the packer does not have a portion caught on the concrete body, the position (depth) of the packer fixed to (inserted into) the concrete body is not uniform.

Since the injection main bodyof the packer is usually made of a metal, it is difficult to remove a portion of the packer and a post process for grinding the protruding portion of the packer with a grinder is required.

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