SU1036829A1 - Working member for repairing joints in concrete pavements - Google Patents

Abstract

1. THE WORKING BODY FOR THE RESTORATION OF THE SEAMS OF CONCRETE COATINGS, containing a frame with a vibration device 4 installed on it, rigidly attached to the knife, so that, in order to improve the quality of the seams by increasing their strength edges due to the superimposition of bending oscillations of the knife on the surface of the edges of the seams, it is made in the form of two plates-waves; They are located in mutually perpendicular planes with a gap one relative to the other, and are equipped with additional vibration exciters, each of the waveguide plates being rigidly connected to the latter. 2. The body according to claim 1, wherein the additional vibration stimuli are made magnetostrictive, rigidly attached to the frame at a distance between their longitudinal axes, a multiple of the half-wavelength of the flexural vibrations, and connected to the waveguide plates by means of subs. .

Description

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- qjjjpz., 411111 The invention relates to road-building machines used in the repair of cement concrete pavements of roads and airfields, and is aimed at reducing labor intensity and improving the quality of repair work.

Closest to the present invention is a working body to the machine for repairing the seams of concrete pavements, including a frame with vibration exciter mounted on it and a knife with a compound cutting edge.

A disadvantage of the known organ is that the knife does not provide high-quality cutting of seams in the freshly laid mixture. The strength of the edges in the weld ede is reduced in comparison with the strength of the coating.

The aim of the invention is to improve the quality of the seams by increasing the strength of their edges by overlapping bend vibrations on the surface of the seam edges.

The goal is achieved by the fact that in the working body for repairing the seams of concrete pavements containing a frame with an exciter mounted on it rigidly connected to the knife, it is made in the form of two plates-waveguides arranged in mutually perpendicular planes with a gap relative to each other, and provided with additional vibration excitation bodies, each of the waveguide plates being rigidly connected to the latter.

In addition, additional vibration exciters are made magnetostrictive, rigidly attached to the frame. The distance between their longitudinal axes, multiple lengths, half-wave of bending vibrations, and connected to the waveguide plates by means of subs.

FIG. 1 shows the working body for the restoration of the seams of concrete coatings with the plots of bending vibrations of plate-waveguides, a general view; in fig. 2 — node 1 in FIG. Ij in FIG. 3 is a section A-A in FIG. 2, in FIG. 4 is a section BB in FIG. 2

The working body for restoring concrete pits contains frame 1, on which vibration exciter 2 is installed. Frame 1 and vibration exciter 2 are rigidly connected to the knife, made in the form of two plastic-wave waves 3 and 4, located in mutually perpendicular planes. other. Waveguide plates 3 and 4 are connected. between themselves jumpers 5 in the nodes of bending vibrations (Fig. 2). Each of the waveguide plates 3 and 4 is independently rigidly connected by means of the sub to additional magnetostrictive vibration exciters 7 and 8, which are rigidly attached to the frame 1 at the location c between their longitudinal axes, the multiple j of the half-wavelength of bending vibrations., Recovery the seams of concrete pavements are carried out as follows.

After cleaning, for example, using a brush / and blowing a jet of compressed air, the seam of the concrete coating is filled with polymer mixture to a certain level. Then, the working body is placed in the seam before the horizontal plate of the waveguide 3 is installed at the level of the concrete cover and the working body is moved along the seam. Vibro-exciter 2 provides action of the disturbing force on the working body, which contributes to the compaction of the concrete mix inside the seam and reduces the friction of the working body over the concrete mix. Simultaneously in waveguide plates

0 3 and 4, under the action of magnetostrictive vibration exciters 7 and 8, high-frequency bending vibrations propagate in mutually perpendicular planes (which are

5 superimposed on the vertical and horizontal surfaces of the seam edges / ensuring acceleration of the polymerization process in the polymer concrete mixture, the de-phase of the boundary layer of the mixture,

0 improving the mix of fresh polymer concrete mixture in the reconstructed edges of the joint with a concrete coating.

Since jumpers 5 are located in the nodes of bending vibrations / then

the effect of the waveguide plates 3 and 4 on each other, when there is a gap between them, is minimized. At the same time, synchronous and in-phase propagation of high-frequency ones. flexural vibrations in plates 0 of waveguides 3 and 4, expressed by the coincidence of nodes and antinodes on the wave plots of 9 and 10 flexural vibrations (Fig. 1 provides comprehensive volume sealing of the edges of the seams. Excess mixture is squeezed out by the unbalance vibrator 2 along the seam.

The application of the invention provides a significant improvement in the quality of the restoration of joints in concrete coatings due to an increase of B or 3-5 times more than the strength of the edges of the joints under the action of high-frequency bending vibrations of the knife under the conditions of comprehensive volumetric compaction of the polymer concrete mix. The process is accelerated 5 and more times.

0 strength of the seam edges, increased efficiency of repair of coatings and the performance of repairs, 24% decrease in the coefficient of abrasion of the coating in the area

5 seam edges.

FIG.

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Claims (2)

1. A WORKING BODY FOR RESTORING SEAMS OF CONCRETE COATINGS, containing a frame with a vibration exciter installed on it, rigidly connected to the knife, characterized in that ·, in order to improve the quality of the seams by increasing the strength of their edges due to. On the surface of the edges of the joints of the bending vibrations of the knife, it is made in the form of two waveguide plates located in mutually perpendicular planes with a gap relative to one another, and is equipped with additional vibration exciters, each of the waveguide plates being rigidly connected to the latter. 2. The organ according to π. 1, characterized in that the additional exciters are magnetostrictive, rigidly attached to the frame at a distance between their longitudinal axes, a multiple of the half-wave length of bending vibrations, and connected to the waveguide plates by means of adapters A □ o