SU1238963A1 - Vibration-percussive apparatus for compacting concrete articles - Google Patents

Description

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

The purpose of the invention is to intensify the processes of compaction of products of specified sizes from building mixtures of various rigidity.

FIG. 1 schematically shows a vibro-impact device, a slit; in fig. 2 is a section A-A in FIG. one; in fig. 3 - anvil, bottom view; in fig. 4 is a view B in FIG. one.

Vibro-shock device consists of installed with the help of elastic supports 1 on the basis of 2 drummer 3 and installed above the working body 4, in contact with the latter with the help of the anvil 5.

The elastic supports 1 are provided with bashmaks 6 with sets of interchangeable adjusting shims 7, with the help of which the height of the elastic supports 1 is set.

Between the working body 4 and the drummer 3 is placed a cuff-valve 8 with a flexible part 9 and a valve edge 10. In the cuff-valve 8 one or more exhaust ports 11 are made. The cuff-valve 8 forms between the working body 4 and the drummer 3 a power chamber 12, enclosing the last one and communicated by sampling-groove 13, made on the lower surface of the working body 4, channel 14, and inlet fixture 15 with hose 16 with pressure source (not shown). The ends of the working body 4 are fitted with upper 17 and lower 18 guide plates, in which horizontally-movable stops 20 are fixed with retainers 19, made, for example, in the form of plates mounted with the approach to the flexible part 9 of the cuff-valve 8, thus that it is possible to limit the mobility of the flexible part 9 and thereby change the working stroke of the valve edge 10 of the cuff-valve 8, for which the circuit 21 of the horizontal-movable stop 20 is made similar to the contour 22 of the valve edge 10 and is parallel to it. When several exhaust ports 11 are made, their total valve edge looks like a straight line. On the horizontally movable stops 20, the scale of 23 readings of the magnitudes of the oscillation amplitudes of the working member 4 is applied, and on the upper guide plate 17 — the corresponding pointer 24. The reverse arrangement of the scale and the pointer is also possible, i.e. scales 23 on the top 17 of the guide plate, and pointer 24 on the horizontally movable stop 20.

On the working body 4 set the form 25 with a concrete mix, on top of which is placed the weights 26.

Vibro shock device works as follows.

A mold 25 with a concrete mix is installed on the working organ 4, the weights 26 are placed on top of it and with the help of a hose 16, an inlet device, a channel 14 and 5

Borki-groove 13 serves energy - compressed air into the power chamber 12, in which an overpressure is created. Under the action of this pressure working body 4

starts moving up and drummer 3 down. Under the action of this pressure, the flexible part 9 of the cuff-valve 8 follows the movement of the working body 4, whereby the valve edge 10 attached to the hammer 3 retains the tightness of the force chamber 12. The elastic supports 1, preloaded by the mass of the working body itself, help the movement of the working body 4 upwards. of the body and the form 25 on it with the concrete mix, and when the drummer 3 moves down its elastic supports 4, compressing, accumulate a part of the energy supplied to the force chamber 12. By the end of the opposite movement of the working body 4 and the drummer 3 of the increase of the distance between a sealing edge 10 of the cuff valve 8 otry0 vaets from the striker 3, whereby obnazhayuts exhaust ports 11 and exhaust pressurized air from the power chamber 12 vyhlopyvaets outwardly. The pressure in the power chamber 12 drops sharply, and the working body 4, together with the mold 25, begin to accelerate downwards under the action of gravity, and the striker 3 at the same time also begins to accelerate upwardly under the action of elastic supports 1, giving away the energy stored in them. As a result

Q mutually directed to each other of the movement of the working body 4 and the striker 3, their collision occurs, creating a vibro-impact loading, transmitted to the form 25 and the concrete mix inside it, which causes the compression of the latter. So

5, a working stroke is made in the device.

By the end of the working stroke of the working member 4 and the striker 3, the sealing edge 10 of the cuff-valve 8 comes into contact with the striker 3, the force chamber is sealed again, the pressure in it rises and the cycle repeats.

The tuning to the optimal mode is performed as follows. Latch 18 is released and horizontally movable stops 20 move to the left or right. When moving, the horizontally movable stop 20 enters the flexible part 9 of the cuff-valve 8 and limits its mobility, so that the valve

0, the edge 10 is previously detached from the impactor 3, the exhaust from the version 11 is exposed earlier, respectively, the exhaust from the power chamber 12 of the exhausted compressed air comes earlier, the amplitude of oscillations of the working element 4 is reduced. With

5, the movement of the horizontally movable stop 20 to the left is the reverse process — an increase in the amplitude of oscillations of the working member 4 is achieved, which reaches its maximum value determined by the limb of the valve edge 10, which is set constructively. On a scale of 23 using the pointer 24 set

horizontally movable stop 20 in accordance with a given amplitude of oscillations of the working body.

25. 3

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Fi. H

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Claims (2)

1. VIBRATING DEVICE FOR SEALING PRODUCTS FROM CONCRETE MIXTURES, containing the drummer supported on the base by means of elastic supports and contacting one another, and a working body mounted above it and an exciter of vibration in the form of an elastic cuff-valve, forming connected to the pressure source and a power chamber enveloping the striker, characterized in that, in order to intensify the processes of compaction of products of specified sizes from building mixtures of different stiffness, it is equipped with a the magnitude and frequency of the power pulses, made in the form of upper and lower guide plates fixed at the ends of the working body with clamps and horizontally movable and opposed stops placed between them, in contact with the outer surface of the elastic valve cuff, and the contour of the valve part of the latter is parallel to the contour of the stops. 2. The device according to π. 1, characterized in that the elastic supports of the working body and the hammer are equipped with shoes with sets of adjusting plates. SU „„ 1238963 Figure 1