SU1221303A1 - Arrangement for prestraining ferroconcrete reservoirs - Google Patents

Description

i.

The invention relates to devices for conveying artifacts to cylindrical concrete tanks on the surface for creating prestr.

The aim of the invention is to improve the quality of the pre-voltage reservoirs.

FIG. 1 shows the device, a general view; on fng. 2 is a view A of FIG. one; in fig. 3 - part of the circuit with contributions; in fig. 4 shows a section BB in FIG. 3

The device contains a movable frame 2 mounted on the tank 1, on which is placed the mechanism of tension and installation of reinforcement consisting of drum 3 with reinforcement 4, movable 5 and stationary 6 blocks, which are looped around the reinforcement, and the equipment for swinging movable block 5 in the vertical plane, made in the form of a rocker arm 7, at one end of which the block 5 is fixed, and the other rings are pivotally connected to the force Bbtt-j cylinder 8.

Frame 2 also has a movement mechanism 9 with a sprocket 10, which interacts with chain 1 I, which is placed in the ring niche 12 of reservoir 1. The chain consists of links 13 and hinged with alternate reels 14 with longitudinal wedge-shaped grooves 15, into which Sway out the first turn of the rebar using deflecting rollers 16.

The sprocket 10 is made with teeth, the pitch of which is increased by the pitch of securing the inserts 14. The tension mechanism 17 serves to tension the chain.

Frame 2 is also fitted with a tape 18 with a tape 19 made of rigid material, which is placed with a ring of 1 to 11 in the annular niche 12 of the tank 1 under the chain 11 in the case of multilayer winding of the valve 4 on the tank surface, and the tape thickness is equal to the diameter of the armature ,

The device works as follows.

The movable frame 2 is mounted on the side surface of the tank 1, while the sprocket 10 of the kex9 movement 9 is connected to a chain 115 laid in the ring niche 12 of the tank 1.

O

5 0 5

about

five

O

five

3033

On frame 2, drum 1 with reinforcement 4, the end of which is fixed, is fixed on the surface of the tank. The device then makes one revolution around the tank, while placing the reinforcement 4 with deflecting rollers 16 in the wedge-shaped grooves of the insert 14 of the chain 11 without tension,

Then, the end of the reinforcement 4 is unfastened and stored through blocks 5 and 6 and fixed to the side surface of the tank. The device begins to move around the tank along the chain 11, with this using the tilting unit 5. and the deflecting rollers 16, the armature 4 is shifted from the well 12 to the side surface of the reservoir 1. Due to the fact that the circumference of the niche 12 is less than the circumference of the lateral surface of the tank by the magnitude of the elongation of the reinforcement at the design tension force, the reinforcement is tightened while crimping the tank.

Simultaneously with rewinding rebar 4 from the recess to the side surface of the tank, rebar rebar 4 is being rolled from drum 3 to chain 1I in the recess. Thus, at any time the device operates on a chain in the wedge-shaped grooves of the liners 14 there is a round of reinforcement. Since the chain J1 consists of. links 13 and 14, then in all asterisks in engagement with the chain, each second tooth is missing to form a tooth pitch equal to the chain pitch, folded with the insert step 14. The absence of each second tooth in the sprocket does not affect its strength The risks as a principle of operation of the device consist not in stretching the reinforcement to the design effort and winding it onto the lateral surface of the tank, but in rewinding it from a small diameter (nipple) to a large one (body), which requires much less energy.

For winding the next layer of reinforcement, the tensioning mechanism 17 weakens the chain 11 and, when the device moves underneath it into the niche 12, the tape 19 is removed from the reel 18. Then the reinforcement is wound in the same way.

If you need to pave another layer of reinforcement under the chain 1I in niche 12, one more layer of tape 19 is cozy.

The use of the invention improves the quality of the prestressing of the reservoir by eliminating the slippage of the reinforcement during its winding, which is wedged in the wedge-shaped grooves of the chain inserts. At the same time, high-quality winding of several layers of reinforcement is also provided.

Type A

11 8

Vuz. g

(rig. 3

7J

6-6

FIG. V

Claims (2)

1. DEVICE FOR PRELIMINARY VOLTAGE OF REINFORCED CONCRETE RESERVOIRS, comprising a movable frame on which a mechanism for laying reinforcement and a movement mechanism with a sprocket interacting with the chain spanning the reservoir, characterized in that, in order to improve the quality of the reservoir prestressing, the circuit is equipped inserts with longitudinal wedge-shaped grooves pivotally fixed with alternation between its links, and the pitch of the teeth of the sprocket is increased by the step of fixing the insert, at m chain is mounted in the annular recess of the tank, and first Free of tension coil reinforcement is laid in the wedge-shaped grooves of its inserts. 2. The device according to p. ^ Characterized in that, in order to ensure the possibility of multi-row winding of the reinforcement, it is equipped with a drum mounted on a movable frame with a tape of rigid material laid in layers in the annular tank niche under the chain, while the thickness of the tape is equal to the diameter of the winding fittings. Figure 1 1 .12