SU1161394A1 - Installation for moulding concrete mix articles - Google Patents

Description

The invention relates to a vibration technique for use in the building materials industry, for forming predominantly hollow concrete products and other 5

similar materials.

The closest in technical essence to the present invention is a vibroplatform in the form of a body mounted on the base with a sealed resonator cavity, a closed membrane and connected by a waveguide with an exciter, and equipped with a vibrating load in the form of an additional body located opposite the vibrating plate with a sealed cavity with a causative agent oscillations, and in the resonator cavities of the vibrating plate and vibroprigruzu 20 resilient vertik limiters are placed ial movement membranes [1].

This installation implements a stable two-way * vibro-impact effect on the concrete mix, however, on it, without significant success. falsification of the design and an additional increase in energy intensity, it is impossible to excite oscillations in the hollow cores. zo

The purpose of the invention is the intensification of the compaction process.

This goal is achieved by the fact that the installation for molding concrete concrete products, containing a movable frame mounted on the base and placed above it with weights with resonator cavities connected by means of pipelines with an exciter of vibrations, is provided with hollow hollow cores attached to their internal surfaces are elastic buffer elements and placed between 45

they are hinged bilami, the causative agent of oscillations made in the form of a pressure source and kinematically connected with the common drive of the upper and lower bleed 50

devices, the cavity of the emptying device is connected at one end through the lower etching device, the resonator cavity of the movable frame to the pressure source, and the other through the resonator cavity of the weights and the upper etching device to the atmosphere.

The elastic buffer elements and the beaters in each hollow core are set uniformly along the helix.

FIG. 1 schematically shows the proposed installation; in fig. 2 node I in Fig. · 1; FIG. 3 is a section A-A in FIG. one; in fig. 4 shows a section BB in FIG. one.

Installation for molding products and concrete mixes contains a movable frame 1, located above it prigruzhnik 2 and formed by the housings 3 and 4 and elastic cuffs 5 and 6 resonator cavities 7 and 8, in which the elastic stops 9 vertical displacements of the movable frame 1 and the weights 2 are placed. The last elastic suspensions 10 is connected with the housing 4. The resonator cavity 7 is connected by means of the pipeline 1 1 to the valve device 12 with a source 13 of pressure.

On the movable frame 1, a pallet with a frame 14 is installed, on which hollow cores 15 are placed with elastic buffer elements 16 fixed on their inner surfaces along a helical line and spaced between them by hinged bars 17.

The ends of the formers are combined into manifolds 18 and 19 with a central hole of conical shape in its upper part 20, and the caps 21 are made in the form of a housing with an opening, the cavities of the emptying formers are connected by one ends through the lower etching device 22, the resonator cavity 7 of the movable frame 1 with the source 13 and another through the resonator cavity 8 of the weight 2 and the upper release device 23 with the atmosphere. The bottom 22 and top 23 pits are made in the form of closed hermetic cavities 24 and 25, in which the diaphragms 26 and 27 with slots 28 and 29 and the disks 30 and 31 with holes 32 and 33 are mounted on a two-shaft electric motor 34.

The conical bore holes of the collectors 18 and 19, as well as the etching devices 22 and 23, are made of a different material (for example, rubber or plastic).

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The installation works as follows.

in a way.

Before starting work vibropriue 2 is in the upper position. A pallet with a frame 14 is inserted into the movable frame 1 into which the void-forming units 15 are pushed. In this case, conical caps 21 enter into the openings of the conical shape of the collector 19 connected by a waveguide with the upper cavity of the lower etching device 22.

The frame, which also performs the function of the sides of the form, is filled with concrete mix. The electric motor 34 is turned on, which begins to rotate the disks 30 and 31, thus blocking ^} periodically the slots 28 and 29 of the diaphragms 26 and 27. "

When opening the valve device 12 compressed air through the pipeline 11 enters the resonator cavity 7 and further along the waveguide into the lower part of the sealed cavity 24. 25

Encountering a diaphragm 26, slit 28, closed by disk 30, on its road. The compressed air creates an increased pressure in the resonator cavity 7, thereby raising the moving frame 1 by 30 degrees of oscillation amplitude. the slit 28 of the diaphragm 26 is bleed air in the top 35

part of the cavity 24, as a result of which the pressure in the resonator cavity 7 falls and the movable frame 1 hits the elastic stopper 9 displacements. 40

As the disk 30 rotates, the latter closes the gap 28 of the diaphragm 26 and the bleeding stops, while the injection into the resonator cavity 7 from the source 13 45

pressure continues, with the result that there is a regular rise of the movable frame 1 and separation from its elastic stopper 9 movements.

From the top of the sealed 50

cavity 24 a portion of compressed air, moving through the waveguide, enters the collector 19 and then through the holes 21 - into the working cavity of void-forming 15. 55

Encountering on its way, installed uniformly along a helix with. interval to each other beat 17,

the compressed air alternately deflects them from the normal position to the elastic buffer elements 16. When the pressure is interrupted, the blow 17, coming back, hits the opposite buffer element 16.

As a result of this movement, a collision occurs against the elastic buffer elements, initiating complex circular vibrations with a horizontal component in the body of the core former.

The exhaust air enters the collector 18 and is released into the atmosphere.

At the final stage of compaction, without interrupting its process, as provided for by the technology, the vibration load 2 is lowered onto the product.

At the same time, the conical waveguide caps enter the conical holes of the collectors and the comparing device, thereby connecting the hermetic resonator cavity 8 of the vibration unit to the source of oscillations.

After the installation of the vibrating unit, the compressed air enters the resonator cavity 8 of the vibrating unit 2 and then through the waveguide, the top bleed-in device 23 - outwards, providing, due to its pulsating effect, vibro-impact vibrations of the vibrating unit 2.

Thus, during this period, the concrete mix is simultaneously affected by vertically directed vibro-impact vibrations of the vibrating plate, vibrating cargo and circular vibratory impact vibrations of the void-forming vibrations with a horizontal component, using the same “portion” of compressed air to excite vibrations.

Changing the parameters of the installation units is achieved by using the diaphragm with the required number of holes, while increasing the number of the latter significantly increases the oscillation frequency. .

Technical and economic efficiency of the proposed installation is due to the possibility of increasing the degree of compaction of the concrete mix and reduce energy consumption due to the excitation of vibro-impact vibrations of complex shape in hollow cores,

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acting on the concrete mix from three sides and (using the same “portion” of compressed air (i.e.

one flow), as well as the possibility of optimal settings for a given vibro-impact mode of the installation

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Rig 1

FIG. 2

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Ζ 6 10 8 9 15 2.

Fig.Z

Bb

6 10 21 2 19

FIG. C

Claims (2)

1. INSTALLATION FOR FORMING PRODUCTS FROM CONCRETE MIXTURES, containing a movable frame mounted on the base and placed above it a load with resonator cavities connected by means of pipelines with an oscillation pathogen, characterized in that The purpose of intensification of the compaction process is that it is equipped with hollow hollow cores with elastic buffer elements fixed on their inner surfaces and placed between them by hinged bars, the oscillation pathogen is made in the form of a pressure source and is kinematically connected with the common drive of the upper and lower etching devices, the hollow core cavity is connected by one the end through the bottom of the etching device, the resonator cavity of the movable frame with a pressure source, and the other Through the resonator cavity 3 weights and the top of the etching device - with the atmosphere. 2. Installation according to Claim. 1, characterized in that the elastic buffer elements and the beaters in each hollow core are installed uniformly along a helical line. > ι 1161394 2