SU763105A1 - Concrete placing machine - Google Patents

Description

one

This invention relates to the field i of the manufacture of precast concrete products.

A paver containing a self-propelled portal on which a carriage is mounted in the transverse direction with a feed hopper connected by means of a lever system with a vertical moving distribution funnel with a rectangular opening fll is known.

The disadvantage of such a device is spilling the concrete mixture along the edges of the mold during leveling.

The closest technical solution to the invention is a paver that contains a self-propelled portal, on which transversely moving bunkers with belt feeders suspended under them and leveling vibrating nozzles, are mounted.

The disadvantages of this device are a decrease in fire resistance, frost resistance and an increase in the volumetric weight of the product due to the fact that during the molding of three-layer products the upper layer is not maintained.

The purpose of the invention is ease of use and improved product quality.

The goal is achieved by the fact that the paver containing a self-propelled portal, on which transversely movable bins 1C are mounted, are mounted below them and the leveling vibro 10 nozzles are equipped with a smoothing device in the form of a driving roller, and each feeder is equipped with a scraper to clean the elastic band at the dispensing end of the feeder under

15 angle of 10-45 ° to the horizontal plane, and vibrating nozzles are made of trapezoidal shape and installed with a smaller base under the dispensing end of the feeder.

In FIG. 1 shows the proposed paver, general view; in fig. 2 node T in FIG. 1 (dispensing mixture), in FIG. 3-scraper, top view; in fig. 4 - leveling nozzles,

25 The paver consists of a self-propelled gantry 1, on which a smoothing device 2 is installed in the form of a driving roller, leveling the vibrating nozzles 3 and mounted transversely movable

bunkers 4. Under the bunkers 4, belt feeders 5 are suspended. The leveling vibro-nozzles 3 are made of trapezoidal shape and are installed with a smaller base under the dispensing end of the feeder 5.,

The height of the screed vibron cage 3 is set in height by means of fixed nuts 6. Each belt feeder 5 is equipped with a scraper 7 for cleaning the elastic tape, which is installed at the dispensing end of the feeder 5 at an angle of 10-45 to the horizontal plane and creates a wedge that prevents the concrete mix from falling off during the period of disconnection of the belt feeder 5 and during the movement of the paver with the feeder disconnected, it cleans the belt of the feeder during operation, thereby eliminating contamination of the production area in the work zone paver and loss of concrete. The concrete mix does not fall onto the face of a freshly molded product. The described device operates as follows.

When the belt feeder 5 rotates, the concrete mixture is fed from the hopper 4 and goes to the scraper 7, and then in an even layer is fed into the leveling hole of the vibrating head 3, which is adjusted to the clearance above the mold according to the specified protective layer of the product solution.

The leveling vibroapproof 3 evenly spreads and levels the mixture in the form, creating a predetermined amount of concrete beam protruding above the form in an unconsolidated state, and when compacting the concrete, a predetermined value for protective

layer of the product solution, i.e. during compaction, the protruding beam of concrete above the form shrinks a certain amount below the edges of the forks to fill the protective layer with the solution. The leveling vibro-nozzles 3 have trapezoidal holes that, during installation, does not shed the mixture on the edges of the form but collect the concrete mix from the edges to the center of the leveling vibrator 3.

Claims (2)

1. USSR author's certificate number 387845, cl. B 28 B 13/02, 1971. 2. Volkov L.A. Laying machines for the production of precast concrete products. TsNIITEstroymash, M., 1968, p. 64-67, Figure 27.