SU874372A1 - Concrete placer to plants for moulding bodies of revolution from concrete mixes - Google Patents

Description

(54) CONCRETE CONVERTER SETTINGS FOR FORMING TELENT ROTATION FROM CONCRETE MIXTURES

I

This invention relates to the manufacture of precast concrete and reinforced concrete products.

A known apparatus for forming rotation bodies comprising a horizontal centrifuge with a roller rolling around the inner surface of the product, made in the form of a pressing head with a spherical band 1.

The closest solution to the proposed invention is a paver, containing a bunker mounted on a self-propelled portal with a screw feeder, at the end of which a smoothing device is fixed in the form of a rotary curved iron 2.

The disadvantages of these devices are concluded in the low quality of the finishing of the internal surfaces of pipes, as well as significant loss of concrete mix during the molding of products.

The purpose of the invention is to improve the quality of the molded products and reduce the consumption of the bituminous mixture.

This goal is achieved by the fact that the paver containing the feed bin mounted on the carriage, in the lower part of which there is a horizontal screw feeder with a smoothing device made in the form of a female thread mounted on the feeder, the pitch of which corresponds to the screw pitch, is provided with a removable support that contacts with the last feeder-conic stop fixed on the free end of the screw.

FIG. 1 shows a paver schematically, a general view; in fig. 2 shows section A-A in FIG. one.

ten

The paver installation for forming rotation bodies from concrete mixes consists of a feed bin 2 mounted on a carriage 1, inside of which is placed a two-roll blower 3.

A screw feeder 6 with a conical stop 7 fixed on the free end is located inside the mold 4 installed on the polycarbonate 5, the latter is located in the fifth of the 8 brackets 9. The fifth 8 is made, for example, in the form of a radial-resistant bearing.

Claims (2)

The smoothing device 10 is made in the form of a piston feeder 6 mounted on the screw BOM with an internal thread, the pitch of which corresponds to the screw pitch, and the outer diameter of the piston is equal to the inner diameter of the molded product. The drive of the screw feeder 6, mounted on the carriage 1, is connected with the drive of the form 4 through the transmission 11 with the detachable coupling 12. The concrete paver works in the following way. When vrach, mold 4 and screw feeder b are fed from the feed bin by a two-roll supercharger 3 into the cavity of form 4, a concrete mix is fed, which is distributed by a screw feeder 6. For more intensive leveling of the concrete mix, form 4 and screw auger 6 rotate in opposite directions. When the concrete mixture in the form of a predetermined degree of compaction is reached, the drive of the vrah, form 4 and drain is turned off by means of the coupling 12 and the drying is carried out, the screw feeder 6 is reversed. The piston 10 due to adhesion to the surface of the concrete is mixed with He cleaned it while grouting the inner surface of the molded product. The concrete mix, coming from the screw feeder b under the piston 10, is pressed into the pipe surface or, if it is impossible to press further, it is transported to the feed hopper 2, which indicates the required degree of compaction of the inner surface of the molded product. In order to distribute the concrete mixture during the compaction process, the screw feeder 6 and form 4 are reversed. In this case, the piston 10, under the action of adhesion forces with the inner surface of the molded product, moves along the screw feeder 6, forcibly redistributing the concrete mixture. Due to the insufficient amount of concrete mix in a separate area of the molded product, the adhesion force between the concrete mix and the piston 10 decreases, which causes the latter to stop. In this case, additional concrete is supplied to the stop zone of the piston 10. To further move the piston 10 into the cavity of the hopper 2, the mold 4 and the screw feeder 6 are reversed. The mold 4 and screw auger 6 can be further reversed to allow the piston 10 to move further the hopper 2, after which the screw feeder 6 is pushed out of the cavity of the mold 4. Formula of the invention of the paver of installations for forming bodies of rotation from concrete mixtures, containing bunker with a lower portion of which is placed a horizontal screw feeder with a smoothing device, characterized in that, in order to increase the quality of molded articles and reduce the consumption of bitumen mixture, it is provided with a removable support, in contact with the last feeder conical abutment ,. fixed on the free end of the screw, and the smoothing device is made in the form of a piston mounted on the feeder with an internal thread, the pitch of which corresponds to the pitch of the screw. Sources of information taken into account during the examination 1. USSR author's certificate No. 370061, cl. In 28 In 21/34, 1970. 2. USSR author's certificate number 442069, cl. In 28B 2} / 34, 1972 (prototype). g / a I {yd / / 1, vanity (l l / v ///} // / // y ////// // l l l A l;. °. ° -. °. °° l ° °°. ° Tf, .y, V: ////// /// ////////////////// l