SU119114A1 - A method of manufacturing reinforced concrete tubings for lining tunnels on centrifugal installations and an apparatus for carrying out the method - Google Patents

Description

It is known to manufacture reinforced concrete tubing by the centrifugal method and a device for implementing the method.

The disadvantage of this method is that it does not provide the compaction of the concrete mixture required for the tubing, and the inner surface of the tubing can be obtained only with a smooth cylindrical shape.

The proposed method provides the possibility of increasing the strength of the obtained products, as well as the creation of a given shape on the inner side of the product.

The essence of the invention is that in the manufacture of tubing on centrifugal installations with a vertical axis on the inside of the product, weights are used, which, under the action of centrifugal force, additionally press concrete and create the necessary shape of the outline of the product.

For the implementation of the method, a device is proposed, made in the form of a centrifuge with a vertical drive shaft and rocker arms attached to it, at the ends of which the molds for products are hinged. Each of the molds is provided, made respectively to the outline of the inner wall of the molded article, with a loading plate with a STOCK moving in the guide block.

FIG. 1 shows a general view of the centrifuge in section along AA; in fig. 2 - a general view of the centrifuge in the section along the BB; in fig. 3 - a form node.

The centrifuge consists of a vertical shaft (with two rocker arms 2 diametrically attached to it), at the ends of which two metal molds 3 are suspended, in which tubing are concrete. The form (see Fig. 3) consists of a guide block 4, a stationary frame 5 and a loading plate 6 with a rod 7.

No. 119114

A removable tray 8 is installed in the fixed frame 5.

When the centrifuge is idle, the forms hang vertically (shown in dotted lines in Fig. 1), while rotating the centrifuge, they occupy a horizontal position:

The radius of rotation of the form corresponds to the radius of the shape of the form.

When centrifuged, the chemically unbound water is removed from the concrete mass through the sheet, covering the mold and under the load. There are corresponding holes in the mold and the delivery plate.

The canvas, in addition, serves to freely remove the product from the mold.

Subject invention

Claims (2)

1. A method of manufacturing reinforced concrete tubings for lining tunnels and similar products on centrifugal installations with a vertical axis, characterized in that, in order to obtain more durable products having a smooth surface on all sides, on the inner side, weights that The force additionally presses the concrete and creates the necessary shape of the outline of the product, for example, tubing. 2. A device for carrying out the method according to claim 1, made in the form of a centrifuge with a vertical drive shaft and rocker arms diametrically attached to it, at the ends of which are hingedly hung forms for forming tubing and the like, characterized in that each provided with, respectively, the outlines of the inner wall of the molded product, a loading plate with a brush moving in the guide block.