SU1161402A1 - Device for making voids in concrete - Google Patents

Description

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 The invention relates to the construction industry and can be applied to the formation of voids in concrete, for example, in the manufacture of glass basements.

The purpose of the invention is to simplify the technology of manufacturing voids, mainly in the form of cylindrical glasses.

FIG. 1 shows a device, side view; in fig. 2 is a section A-A in FIG. one; in fig. 3 is a section BB in FIG. 1 (core in plan) j in FIG. 4 shows a section B-B in FIG. 3

The device for the formation of voids in concrete contains an abutment 1, which encloses incomplete semi-cylinders 2, fitted with device position latches 3, and at the base there are half-half 4 fixed obliquely to the diametral plane of the cylinder and hinges 5 connected to each other at the apex of the corner. the core is located, consisting of longitudinal bars 6 with shoulder 7, connected by hinged levers 8 mounted at an angle to them, with longitudinal pull 9, provided with a loop 10 and a hole 11 for a pin for fixing and the core in the initial position. - To impart rigidity to the longitudinal bars 6, they are provided with reinforcing gussets 12. For fastening the half-cylinders 2 in the outer part of the device, a clamping element 13 is used attached to the stiffening ribs 14 of the half-cylinders 2.

The device works as follows.

Initially, it is assembled by inserting the core fixed in the initial position with a finger inserted into the hole 11, between the semicylinders 2, fastened with their clamping element 13. Then, using a lifting mechanism, the device is inserted into the opening of the enclosing support form 1. Fill the mold with concrete, compact it and place the molded structure in a steam chamber. After steaming, when the concrete scored enough. exact strength, the device is dismantled, for this purpose, the fixing pin is first taken out of the hole 11, and then hit the sledge hammer on the outwardly protruding ends of the longitudinal bars 6, reinforced with kerchiefs 12. In this case, the ends of the longitudinal bars 6 are gradually detached from the concrete and the core is folded. After the longitudinal bars 6 detach from the concrete and come out of the engagement with the semi-cylinders 2, the latter are hit, disrupting the adhesion of the metal to the concrete, the semi-cylinders 2 are displaced towards the center, and the device is removed from the tumbler by means of a winch or using hydraulic cylinders.

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Claims (2)

D. DEVICE FOR FORMING HOLLOWS IN CONCRETE, containing shuttering boards installed with a gap in which the folding core is located, and an abutment covering the boards for fixing the device in the form, characterized in that, in order to simplify the technology of manufacturing voids, mainly in the form of cylindrical glasses, the core 'is made in the form of longitudinal bars installed in the working position by means of a longitudinal rod pivotally attached to them by means of levers, shuttering boards - in the form of incomplete half-cylinders, and rigidly end half-flanges attached to them, pivotally connected to each other and forming the bottom of the glass. 2. The device according to π. 1, which means that the half-cylinders at the base are made with bevels to a horizontal plane passing through the cylinder diameter, with the half-sides forming dihedral angles with it, at the top of which a hinge is located on the inside with an offset relative to the beginning of the bevels.