SU841969A2 - Concrete-compacting vibration unit - Google Patents

Description

(54) VIBRATION SYSTEM FOR CONCRETE SEAL

MIXTURES

one

This invention relates to the manufacture of precast concrete and reinforced concrete products.

According to the main author. St. 663587 is a known vibratory installation for compacting a concrete mix containing a base-mounted infrasonic oscillator with a main waveguide, a form with a pallet, an elastic gasket installed between the base and the pallet, around the perimeter of which a seal is mounted in the form of a knife placed in a groove of the base with the formation of the working chamber connected to the main waveguide 1.

The disadvantage of the known vibration installation is greater power consumption and low reliability due to its external load (frame and form with concrete) permanently connected to the generator, which causes large overvoltages in the basic elements of the generator during start-up, and when the engine is disconnected the so-called stopping resonance resulting from the natural oscillations of the moving parts of the installation on the elastic stopper, which leads to a discontinuity of the molded concrete and worse iju quality of manufactured articles.

The purpose of the invention is to reduce energy intensity and increase reliability.

This goal is achieved by the fact that the vibratory plant for compacting concrete. a mixture containing an infrasonic oscillator mounted on a base with a main waveguide, a shape with a pallet, an elastic gasket installed between the base and a pallet, around the perimeter of which a seal is fixed in the form of a knife placed in the groove of the base to form a working chamber connected to the main waveguide provided with an additional waveguide, and a switch in the form of a housing connected by channels to the atmosphere with the main and additional waveguides, and a rotary slide valve, and the infrasound generator to oscillations formed piston, wherein a further waveguide connected to the last opozitno main waveguide.

Claims (1)

FIG. 1 schematically shows a vibratory installation for compacting a concrete mix, general view, section; in fig. 2 - position of the rotary two-channel spool during the start-up period; in fig. 3 - the same, in the period of steady state operation; in fig. 4 - the same before stopping. Vibration plant for compacting concrete mix consists of a base 1 with an elastic gasket 2, on which form 3 is installed with an inventory tray 4, on the perimeter of which a seal is fixed in the form of a knife 5 placed in a groove of base I and forming a working chamber 7 connected to the main wave guide 8 and the cavity A of the pneumatic generator 9 of the infrasonic oscillations associated with the water motor 10. The main waveguide 8 has a switch in the form of a housing 11 connected to the atmosphere, the main 8 and an additional 12 waveguides channels 13, 14 and 15, respectively. Inside the case 11 a rotary valve 16 with channels 17 and 18 is placed, the cross section of each of them is equal to the cross section of the main waveguide 8. The switch body 11 is connected by an additional waveguide 12 to the cavity 5 of the 9 generator of infrasonic vibrations. The area of the cross section of the channel 19 at the inlet of the housing 11 is twice the cross section of the waveguide 20 connecting the channel 19 with the cavity A of the generator 9 of infrasonic vibrations. Vibration plant for compacting concrete mix works as follows. Before turning on the motor 10 of the generator 9 of infrasonic vibrations, the spool 16 is rotated so that the cavity B of the generator 9 of infrasonic oscillations through the additional waveguide 12, the channels 15, 17 and 19 of the switch and the waveguide 20 is connected directly to the cavity A of the generator 9 of infrasonic vibrations, and the external load disabled. After starting the engine 10 and moving the surfaces 21 to the right in the cavity 9 of the generator 9, a compression wave is created, and in cavity B a vacuum is created. As Porsch 21 moves to the right to its extreme position, the pressure pulse through the additional waveguide 12 is transmitted to cavity B, creating an additional force acting in the direction of movement of Porsch 21 and facilitating the operation of engine 10 of generator 9. During reverse, Porsch 21 is consumed by engine 10 power decreases. After the output of the infrasonic oscillations generator 9 into the operating mode, the spool 16 rotates so that cavity A through waveguide 20, channels 19, 17 and 14 is connected to the main waveguide 8, while the infrasonic pulses generated in cavity A of generator 9 are transmitted to the working chamber 7, where mold 3 is affected by the concrete mix, and cavity B through the additional waveguide 12, the channels 15, 18 and 13 are connected to the atmosphere. Upon completion of the compaction of the concrete mix, the spool 16 is transferred through an intermediate position, in which the cavities A and B of the generator 9 of infrasonic vibrations communicate with the atmosphere, to the initial position, after which the engine 10 is turned off. Invention formula Vibrator for compacting the concrete mix by author. St. No. 663587, characterized in that, in order to reduce energy intensity and increase reliability, it is equipped with an additional waveguide and a switch in the form of a housing connected to a secondary crystal with an atmosphere, a main and additional waveguides, and a rotary slide valve, and the generator of infrasonic vibrations is made piston, moreover, the additional waveguide is connected to the last opozitno main wave guide. Sources of information taken into account during the examination 1. USSR Author's Certificate No. 663587, cl. B 28 B 1/08, 1977U /, / // / 3 // / 2. °: o:., :: /. :: .. - :. . .-..-....about;;:; : O-.Y: O:};,: o.- .0,.:; About: .- :: About. ::; -; ь: .- 5.-.-. .e; -V.V:: fU2. 841969 / 2 V / 9 2U