SU1693175A1 - Concrete spreader - Google Patents

Abstract

The invention relates to devices for compacting concrete mixtures and may find application in reclamation, road and other construction sites. The purpose of the invention is to improve the quality of a concrete coating by increasing the stability of its thickness and flatness of the surface. The sealing 8 and the smoothing 9 vibrating bars of the positional paver are interconnected by a flexible gasket 10 attached to the rear and front edges of the bottom sheets of the compacting and smoothing vibrating bars bent up. The rotation of the vibrator 11 of the sealing bar is counterclockwise. This creates a uniformly spaced limited volume of cement-sand mortar in front of the smoothing bar, which prevents the occurrence of non-impacted forces capable of changing its geometric position, and creates favorable conditions for the effective finishing of the concrete pavement. 2 Il.

Description

The invention relates to devices for compacting concrete mixtures and is intended for use in reclamation, road and other construction sites.

The purpose of the invention is to improve the quality of a concrete coating by increasing the stability of its thickness and flatness of the surface.

FIG. 1 shows the structure of a vibrating compactor on a positioning concrete paver; in fig. 2 - vibrating compactor consisting of double vibration bars, cross section.

The position paver includes a frame 1 (see FIG. 1), which in

the work process at one end rests on the lower support 2, and the other on the frame of the base machine 3.

A carriage 4 is moved along the frame, to which the frame with the working equipment is attached by means of hinged bolts 5 and 6 (see Fig. 2). The working equipment includes a frame 7, a front sealing vibrator 8, a rear smoothing vibrator 9 and an elastic sealing compound 10.

Vibrator 11 is mounted on the compacted vibrator 8, driven by an electric motor 12, and vibrating rod 9 is mounted on a vibrator 13 driven by an electric motor 14.

Vibrating structures of the compacting and smoothing vibrating bars

w

Vi ate

Dineni with the frame of the machine through the elastic shock absorbers 15 and 16. The rear end of the sealing and front smoothing bars are bent upward so that a cavity 17 is formed to collect and accumulate the mortar part of the concrete mix. To seal the cavity 17, the bent ends of both vibrating bars are connected by a continuous rubber band. The rotation of the vibrators of the compaction bar is always opposite to the direction of the working movement of the vibrating bars, and the drive of the vibrators of the smoothing bar is reversible.

The paver works as follows.

First, a concrete mix is laid out on the strip to be concreted in some way, such as a crane-bucket. The working equipment at this time is located at the next edging edge in its initial position for concreting. The working process of concreting begins with the inclusion of vibrators and the mechanism for moving the carriage to the working equipment, while the rotation of the vibrator of the compacting bar is made opposite to the working movement of the vibrating bars.

The front vibrating bar thrust over the previously unfolded and not yet compacted hard concrete mix, similarly to the bulldozer, forms in front of itself a roller of the concrete mix (zone 18, see Fig. 2), which must be at least 20 in thickness to completely fill the concrete pavement. 25 cm in height from the sole of the vibrating bar, taking into account the unevenness of the previously distributed concrete mix on the slope.

The reaction from moving in the concrete mixture zone 18 causes significant horizontal and vertical forces on the compacting bar.

In addition, since the first compaction bar is installed with a significant angle of attack, ensuring that the initial seal allowance is almost completely absorbed, it experiences significant vertical loads.

The kinetostatic nature of the working process of the compaction bar, associated both with the movement of a large-sized roller of the concrete mix in zone 18, and the construction of the bar, the bottom of which is made with an angle of attack, also causes significant horizontal and vertical displacements that prevent it from meeting the specified concrete coating thickness

in the case of its single (vibratory) application.

This drawback in the proposed design is eliminated by installing a flexible joint between the first and second bar and arranging a small constant volume of the liquid phase (cement-sand mortar) evenly spaced before the start of smoothing.

0 timber in the cavity 17.

The working process of twin vibrating bars is as follows.

The vibrator of the first compacting bar switches on necessarily in the opposite direction relative to the working movement of the vibrating bars. In this case, the sealing bar acquires circular oscillations (see Fig. 2). The reaction for the concrete mix to these fluctuations is counterbalanced. Due to circular vibration, the vibrating beam draws off the liquid phase, creates a transport effect, directing the cement-sand mortar from the beginning of the vibrating bar to its end,

5 i.e. into the cavity 17.

Since the cavity 17, created by the bends of the bottom sheets of the vibrating bars and the sealing sheet of rubber, is small in volume, the second (smoothing) bar is not

0 is experiencing any major efforts that can change its geometric position, and at the same time, in front of its leading edge, in a small and constant volume in height and length, the cement-sand mortar necessary for effective finishing and smoothing down the concrete pavement. In addition, using the reversing drive of the smoothing bar vibrator, one can either contribute to an increase in the release of cement-sand paste under its bottom, imparting a clockwise rotation of the vibrator or vice versa.

five

Claims (1)

The invention of the paver, including a hinged frame attached to the base machine and a frame along the slope 0 guides of which a carriage is installed with a hinge fastening to it by means of two pairs of t with a frame with sealing and smoothing vibrations with bent edges of the bottom sheets, in order to improve the quality of the concrete pavement by increasing stability of its thickness and surface evenness; vibrobar is interconnected by a flexible gasket attached to the rear and back days, the edges of the bottom sheets are compacted against the direction of the working vibrating bars, moving the vibrating bars, and the vibrating bar is driven by the vibrating bars of the flattening bars of the smoothing bar Filled with the direction of rotation of the meeting-reversible. five