SU80312A1 - Method and device for manufacturing prestressed reinforced straight linear elements - Google Patents

Description

A known method of manufacturing prestressed reinforced concrete rectilinear elements is that the winding wire is produced by straining the parts of the concrete mold and in which the wire is cut at the ends of the elements after the concrete is cured to separate the obtained block into individual elements.

. SUMMARY OF THE INVENTION The essence of the invention is that the wire is directly rolled onto the dividing walls of the mold for the concrete of several concrete elements.

FIG. 1 shows a view of a dividing wall with coils of wire in front; in fig. 2 is a top view of a drawer with dividing walls mounted on it; in fig. 3 is a transverse section of the bead of the separation wall

A block or dividing wall 1, rotated in centers around its transverse axis 2, is wound under a constant tension on a metal or other material, or the wire 3 is preheated to a certain temperature, the ends of which are fixed on the dividing wall. To the smaller sides of the dividing wall 1, which has a rectangular shape, are welded to Qszi iron strip 4, which ensures a gap of a certain size between the wire 5 and the surfaces of the wall 1 when winding. when concreting the protective layer over the reinforcement.

At the ends of the separation walls, onto which the wire is wound, grooves 5 are made to facilitate cutting the turns of the wire after the concrete has hardened.

No. 80312-2 -

For winding several rows of reinforcing wire, additional strips of U-shaped cross-section are used, worn on the ends of the separation walls after each row of wire is wound on them.

The rebar, without prestressing, is reinforced on the longitudinal turns of the wire.

A number of such dividing walls (with wire 3 wound on them) is laid in the grooves 5 of the rectangular crate 7. Gaps 5 are formed between each pair of adjacent walls /, the size of which determines the thickness of the plates to be made.

The gaps S at the same time fill in the vibrated concrete. Vibrations are mounted on the walls of the crate or else a vibrating table is used.

Stripping of finished slabs, obtained in each of the gaps 8, is carried out after the concrete has reached sufficient strength.

To speed up the build-up of strength, concrete can be applied or it can be heated.

After removal of the wall, a package is obtained that is interconnected between alternating plates and separating walls. By cutting the sections of the wire around the ends of the walls, final stripping is carried out. In order to facilitate the removal of the surface of the walls, before concreting, they are smeared with some substance that prevents their adhesion to concrete.

At the moment of biting, the wires, lastly, will shrink, crush the plates, which will ensure the preliminary compression of the concrete.

Thus, each wall serves at the same time as formwork and a part that receives the temporary effort of prestressing the wire.

Due to the fact that the upper and lower reinforcement of each plate is wound into two different pads, it is possible to obtain different reinforcement in the stretched and compressed areas of the product. The difference can be obtained both in terms of the tagging of windings, diameter and properties of the rolled wire, and in relation to the values of the preliminary tensions. This is achieved by alternating pads with the corresponding character winding.

Thus, the proposed method and device allows for the continuous application of continuous reinforcement, which can be carried out both under factory conditions and by the forces of any construction site.

Subject invention

Claims (6)

1. Saw manufacturing of pre-roller reinforced concrete molded elements, in which the reinforcing wire is wound with tension on the details of the mold for concrete casting and in which this wire is cut at the ends of the elements after hardening the concrete, in order to divide the resulting block of elements into individual elements so that wire winding is carried out directly i: a dividing walls of the form for the concrete of several reinforced concrete elements, 2. A device for carrying out the method according to claim 1, characterized in that the partition walls, holding the wire packed under them under tension, have protruding beads in order to form a protective layer above the reinforcement during concreting. 3. The device according to claim 2, characterized in that the ends of the partition walls, on which the wires are wound, are made grooves in order to facilitate cutting the turns of the wire after the concrete has hardened. 4. Device on PP. 2 and 3, characterized in that the partition walls are made removable, in order to facilitate wire winding on them. 5. Device on PP. 2-4, characterized in that, for the purpose of winding several rows of reinforcing wire, additional pads are applied, which are worn on the ends of the separation walls after each row of wire is wound on them. 6. The device according to claim 5, characterized in that the additional pads have a U-shaped cross-section, in order to more conveniently mount them on the ends of the partition walls. jii: K w 7 r / Wy //: 7 | v: f5 Ib) FIG. 2