UA151587U - Paver for vibrating, placing and compacting concrete mix - Google Patents

Abstract

A concrete paver for vibrating, placing and compacting concrete mixtures includes a self-propelled portal with a hopper mounted on its supporting frame. A vibrating box made in the form of longitudinal vertical and inclined end walls is suspended from the hopper on elastic shock absorbers. The end walls are deviated from the vertical by an angle of 12...17.5 each and a circular vibration exciter is installed on one of them with the axis of the unbalance shaft parallel to the inclination of this end wall. A smoothing plate is rigidly fixed to the end wall. Vertical plates connecting the end walls of the box are rigidly fixed inside the vibration box. The amplitude of the vibration exciter is equal to Q=(0,0012÷0,0015)(m1+m2))2, where m1 is the mass of the vibration box with vertical plates, kg; m2 is the mass of the smoothing plate, kg; r is the angular frequency of forced oscillations of the vibration exciter, which is equal to 0.85...1.0 angular frequency of the industrial electric current in rad/s. The width of the exit mouth of the vibration box is equal to L1=(0.5÷2)H1, the height of the vibration box is equal to H2=(2÷3.5)L1, the length of the smoothing plate is equal to L2=(2÷3.5)L1. Vertical plates are equidistant from each other and from the vertical walls of the vibrating box at a distance equal to b=(2÷4)L1, where H1 is the thickness of the concrete mixture layer to be placed.

Description

The utility model belongs to the construction industry, namely to machines for forming cement concrete and other similar materials.

To form concrete products, factories still use a well-known concrete paver (A.A. Borshchevskii, A.S. Ilyin. Mechanical equipment for production of construction materials. - M.: Alyans, 2014. - 368 p.), which has low productivity and does not provide vibration processing and compaction of the concrete mixture, as it contains a self-propelled portal with a hopper mounted on it, a belt feeder and a plow for leveling the concrete mixture, which leads to a complex and expensive process of manufacturing concrete products.

The closest analogue to the proposed useful model is a concrete paver, which contains a self-propelled portal with a hopper mounted on its supporting frame, to which a rocking smoothing plate is hinged (patent KO Mo 105306, IPK EO1С 19/48 (2006.01).

Publ. 10.06.2011, Bull. Mo 16).

The task of the proposed useful model is to reduce the energy consumption and increase the productivity of the production of concrete products.

The task is solved by the fact that the concrete paver for vibration processing, laying and compaction of the concrete mixture, which contains a self-propelled portal, on the supporting frame of which a hopper is mounted, according to a useful model, a vibration box is suspended from the hopper on elastic shock absorbers, made in the form of longitudinal vertical and inclined end walls, and the end walls are deviated from the vertical by an angle of 12...17.5 each, and a vibration exciter of circular oscillations with the axis of the unbalanced shaft parallel to the slope of this end wall is installed on one of them, and a smoothing plate is rigidly fixed on this end wall , and vertical plates connecting the end walls of the box are rigidly fixed inside the vibrating box, and the amplitude of the vibration exciter is equal to О-(0.0012--0.00153(t:-ntg2)о-, where t: is the mass of the vibrating box together with vertical plates, kg; t is the mass of the smoothing plate, kg; w is the angular frequency of forced oscillations of the vibration exciter, which is equal to 0.85...1.0 kuto industrial electric current frequency in rad/s; at the same time, the width of the output gap of the vibrating box is equal to 1 1-(0.5--2)Н:, the height of the vibrating box is

At (2-3.5)3/th, the length of the smoothing plate is equal to 12-(2-3.5)Her, and the vertical plates are equidistant from each other and from the vertical walls of the vibrating box at a distance equal to B -(2-4) And 1, where No is the thickness of the layer of concrete mixture being laid.

A fundamentally new concrete paver for vibration processing, laying and compaction of the concrete mixture has a structure different from traditional machines, and the overall dimensions and the proposed range of the amplitude of the vibration exciter influence the increase in the productivity of the production of concrete products.

The drawing shows the general appearance of a concrete paver for vibration treatment, laying and compaction of concrete mixture.

The proposed new concrete paver consists of a self-propelled gantry, on the supporting frame 1 of which a hopper 2 is mounted. A vibrating box, made in the form of longitudinal vertical 4 and inclined end walls 5 and 6, is suspended from the hopper 2 on elastic shock absorbers Z, and the end walls 5 and 6 are deviated from vertical at an angle of 12...17.57 each. On the end wall 5, a vibration exciter of circular oscillations 7 is installed, in which the axis of the unbalanced shaft is parallel to the slope of this end wall. A smoothing plate 8 is rigidly fixed on this end wall 5, and vertical plates 9 are rigidly fixed inside the vibrating box, connecting the end walls of the box 5 and 6. The amplitude of the vibration exciter 7 is

O-(0.0012-0.0015U3(t1-nt2)sh», where t! is the mass of the vibrating box together with the vertical plates,

Kg; t" - weight of the smoothing plate, kg; oyu - the angular frequency of forced oscillations of the vibration exciter, which is equal to 0.85...1.0 of the angular frequency of industrial electric current in rad/s.

At the same time, the width of the output gap of the vibrating box is equal to 1 -(0.5-2)No, where No is the thickness of the layer of the concrete mixture being laid; the height of the vibrating box is equal to Но-(2-53.5)І і, the length of the smoothing plate 8 is equal to И 2-(2-3.5)І і, and the vertical plates 9 are equidistant from each other and from the vertical walls 4 of the vibrating box on distance equal to p-(2-4

The work of the concrete paver for vibration processing, laying and compaction of the concrete mixture is carried out as follows. The concrete paver is installed above the form 10 and the hopper 2 is filled with concrete mixture 11. First, the vibration exciter of circular oscillations 7 is included, and after some time, the mechanism for moving the concrete paver is included. Under the action of the vibration exciter of circular oscillations 7, the vibrating box and the smoothing plate 8 experience complex spatial oscillations in the form of horizontally directed oscillations with an amplitude of 0.9...1.2 mm and vertically directed oscillations with an amplitude of 0.2...0.35 mm. As a result, the concrete mixture that has entered the hopper and passes through the vibrating box is subjected to vibration in it from the inclined end walls 5 and 6, vertical walls 4 and vertical plates 9. At the same time, elastic-plastic waves of deformations arise in the concrete environment, which destroy the initial tension, cement particles are retained.

The mixture becomes more mobile, the process of enveloping the mineral particles with viscous material accelerates.

The mixture is compacted.

As a result, along with the vibration treatment, the necessary compaction of the concrete mixture takes place, and in this compacted form it fills the form and falls under the influence of the smoothing plate, which additionally compacts and smooths the surface of the concrete layer placed in the form.

The use of the proposed concrete paver for vibration processing, laying and compaction of the concrete mixture allows you to abandon additional vibration devices for compaction of the concrete mixture, for example in the form of a vibrating platform, to increase the strength of the concrete product by 30-40 percent as a result of vibration processing, to reduce it by 2.5-3 times energy intensity of the process of forming concrete products.

Claims (1)

USEFUL MODEL FORMULA Concrete paver for vibration processing, laying and compaction of concrete mixture, containing a self-propelled gantry, on the supporting frame of which a hopper is mounted, which is distinguished by the fact that a vibrating box, made in the form of longitudinal vertical and inclined end walls, is suspended from the hopper on elastic shock absorbers, and the end walls are deviated from the vertical by an angle of 12...17.5 each, and a vibration exciter of circular oscillations with the axis of the unbalanced shaft parallel to the inclination of this end wall is installed on one of them, and a smoothing plate is rigidly fixed on this end wall, and vertical plates are rigidly fixed inside the vibrating box, connecting the end walls of the box, and the amplitude of the vibration exciter of oscillations is equal to СО-(0.0012-0.0015)(t:--tg2g)o-, where they are the mass of the vibrating box together with vertical plates, kg; tg - mass of the smoothing plate, kg; o - angular frequency of forced oscillations of the vibration exciter, which is equal to 0.85...1.0 angular frequency of industrial electric current in rad/s; at the same time, the width of the output opening of the vibrating box is 11-(0.5--2)Ниi, the height of the vibrating box is Не-(2-3.53Йи), the length of the smoothing plate is equal to 1 2-(2-3.5) And 1, and the vertical plates are equidistant from each other and from the vertical walls of the vibrating box at a distance equal to p-(2-4)Yi, where Ni is the thickness of the layer of the concrete mixture being laid.