RU105306U1 - CONCRETE LAYER - Google Patents

Abstract

 A paver containing a frame on a self-propelled chassis, sliding forms, a hopper for receiving concrete mixture, a screw mixer, a blower with a plate fixed to its base, a smoothing plate and a drive, characterized in that the screws of the mixer are located inside the hopper, the discharge window of which is aligned with working area of the supercharger, one end of the supercharger plate is connected to the eccentric drive shaft, and the other end of the supercharger plate is connected to the swinging spacer lever, pivotally connected through adjustments full-time device with a self-propelled chassis frame.

Description

The utility model relates to the technique of laying and compacting cement-concrete, asphalt-concrete mixtures, construction, road and other materials.

Known machines for laying and compacting concrete mix (Novikov AN Machines for the construction of cement concrete pavements. - 2nd ed., Revised and additional M .: higher school, 1979. from 183 ... 202), consisting of concrete distributor DS-99 (DS-109) and concrete paver DS-101 (DS-111). The base of these machines is a self-propelled unified four-tracked caterpillar chassis with a frame, a transfer conveyor with a receiving hopper, a milling screw, a metering blade, sliding forms (sliding formwork), a screw (screw) distributor, a metering beam, depth vibrators, a vibratory damper, a front swing beam rear swing beam and floating beam.

Depth and surface vibrators, vibration dampers are equipped with an electric or hydraulic drive. Deep vibrators are the main equipment for compaction of the mixture. They allow you to work out the mixture with a cone draft of at least 2.5 cm. Vibrators are installed in increments of 0.6-0.53 m over the entire width of the laid strip.

The swinging beams make transverse swinging movements and overwrite the surface, and the floating beam finally smooths the surface of the molded cement concrete coating.

This paver is a type of paver with sliding forms and consists of a self-propelled chassis, sliding forms, submersible vibrators, smoothing bars and a screw distributor.

Closest to the claimed utility model is the construction of the paver (RU 2014378, IPC E01C 19/48, decl. 11/21/1989, publ. 06/15/1994).

The paver contains a vehicle placed on the frame of a trailed uniaxial trolley and having a hydraulic cylinder of rotation from a connected receiving and distributing sections, a distributor mounted under the open end of the latter, a vibrating plate articulated with a sliding formwork, mechanisms for translating them into transport position. To increase efficiency in work, it is equipped with a feeder mounted on the frame of the trolley between the distributor and the vibratory hopper, the dispensing section is made in the form of a funnel, the rear wall of which is connected in the direction of travel with the receiving section, which has stops on the opposite side, the hopper is mounted for rotation in the plane symmetry of the paver, and formwork panels with the ability to move in the horizontal plane.

To seal the material to be laid, create vibrations using, for example, deep vibrators, vibration bars, vibrating plates. The main disadvantage of this compaction method is the need to have some excess water in the concrete mixture, which makes it impossible to obtain high strength and frost resistance of concrete. In addition, submersible vibrators form, after their advancement, “channels” that create heterogeneity of the mixture in fractional composition. All this reduces the physical and mechanical properties of the concrete structure and, as a result, worsens its consumer properties.

The noted disadvantages of the prototype are eliminated in the proposed utility model of the paver.

The technical task of the proposed utility model is to obtain higher physical and mechanical properties of concrete mixes to be laid and to expand the functionality of the paver.

This problem is solved in that the paver containing a frame on a self-propelled chassis, sliding molds, a hopper for concrete mix, screw mixers, a blower plate and a smoothing plate and a drive are characterized by the fact that the screws of the distributor are located inside the hopper, the unloading window of which is combined with the working window supercharger plate zone, one end of the supercharger plate is connected to an eccentric drive shaft, and the other end of the supercharger plate is connected to a swinging spacer lever, pivotally connected through a A self-propelled device with a self-propelled chassis frame.

Due to the new mutual arrangement of the main structural elements of the paver, the movement of the supercharger plate is carried out along complex paths with vertical and horizontal components, ensuring the mixture is pressed and grouted with one working body.

The essence of the claimed utility model is illustrated by drawings, where Fig. 1 shows a diagram of a device for producing products of high-density structure with the upper position of the supercharger; in Fig. 2 - the same with the lower position of the supercharger.

The paver contains a frame 1 of a self-propelled chassis, sliding forms 2, a receiving hopper 3, a screw distributor 4 located inside the hopper, an eccentric drive shaft 5, a blower 6, a replacement plate 7, a smoothing plate 8. The discharge window 9 of the hopper 3 is aligned with the working area 10 of the blower 6. Bearing housings connected to the eccentric drive shaft 5 are installed at one end of the supercharger plate 6, and the other end of the plate 6 is suspended from the spacer lever 11, which is connected to the adjusting device 12 and the frame 1 of the self-propelled chassis.

The paver works as follows. Upon receipt of the concrete mixture in the hopper 3, the concrete mixture with a screw distributor 4 moves along the entire width of the stacked layer. The eccentric drive shaft 5 moves the supercharger 6, which, under the influence of the spacer lever 11, begins to make a complex movement according to the principle of operation of a jaw crusher with a complex swing of the movable cheek. The supercharger 6 makes complex movements in space, occupying either a horizontal position, or at a certain angle α to the horizontal (no more than 20 ° is recommended). When the supercharger moves upward, the bulk material from the hopper 3 under its own weight moves down and fills the working area of the supercharger 6. When the supercharger 6 moves down, a new portion of the material is pressed into the volume of the underlying material, increasing its density. Excess condensed material, water and air are squeezed out into the open zone. The screed plate 8 supports the material being pressed, providing directional movement of air and excess water in the direction of least resistance, i.e. towards open space.

Excess water is squeezed out of the concrete mixture and flows down the side of the road. Compression of the mixture is combined with grouting due to the complex movement of the supercharger plate. When grouting the surface of the concrete mixture, increased mechanical wear of the blower may be observed, so the latter is made integral with a removable plate 7.

For the device to operate successfully, the following condition must be observed: the maximum angle of inclination of the plate 7 of the blower 6 to the horizontal should not exceed the angle of friction between the material being sealed and the working surface of the plate 7 (usually this is 18 ... 23 degrees and in the calculations you can take 20 °), in this case the material does not slip out from under the supercharger plate back into the hopper 3. By sliding or pushing the wedges of the adjusting device 12 together, the height of the supercharger 6 can be adjusted in height. The paver can be self-propelled with creeping forms or stationary, but with mobile forms.

Compared with the prototype, in the proposed paver can be used mixtures with any amount of excess water, which is removed from the mixture during laying and compaction and does not further reduce the strength characteristics of concrete.

The proposed paver provides:

- obtaining increased physical and mechanical properties of concrete mixes laid by the maximum possible displacement of water and air from the pressed material, that is, a denser pressing is carried out, ceteris paribus.

- expanding the functionality by obtaining vertical and horizontal movements of the supercharger plate, creating both pressing and grouting of the material to be laid, as well as due to the possibility of laying concrete mixtures in a wide range of water-cement ratios (from cast to hard mixtures);

In addition, the paver provides concrete structures with increased strength and frost resistance due to the direction of flow of bulk material into the working area of the supercharger and by removing excess (mobile) water from the original concrete mixture.

When using the proposed paver, the cement consumption is reduced by reducing the water-cement ratio during the laying and compaction of the concrete mixture.

Claims (1)

A paver containing a frame on a self-propelled chassis, sliding forms, a hopper for receiving concrete mixture, a screw mixer, a blower with a plate fixed to its base, a smoothing plate and a drive, characterized in that the screws of the mixer are located inside the hopper, the discharge window of which is aligned with working area of the supercharger, one end of the supercharger plate is connected to an eccentric drive shaft, and the other end of the supercharger plate is connected to a swinging spacer lever, pivotally connected through adjustments full-time device with a self-propelled chassis frame.