SU897515A1 - Vibration table - Google Patents

Description

I

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

The closest to the present invention is a vibro-slug containing an air-cushion chamber installed on the base and communicating with it the pneumocylinders to which. an intermediate plate supported in contact with the anvil by means of anvils placed in a hermetic casing connected to a vacuum source (1

A disadvantage of the known device is that in order to create a counter-stroke intermediate feed of the movable frame, the presence of a double drive is required, leading to a considerable air flow and complicating the process of controlling the vibrating plate.

The purpose of the invention is to reduce energy consumption and ensure stable operation.

This goal is achieved by the fact that the vibrating plate containing the air bed chamber installed on the base with communicating pneumocylinders with it, on which the intermediate plate is supported, in contact with the movable frame by means of anvils placed in a sealed casing connected to a vacuum source, is provided with interim vacuum distributors and a power cylinder placed between the mobile paMofi and the intermediate plate and connected to the source of compressed air through one of the distributors, and the source The vacuum unit is connected via another distributor and vacuum unit with a hermetic casing.

In the drawing, a schematic image of the hen vibrating plate, general view, section.

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Claims (2)

The vibrating plate consists of a movable frame 1, an intermediate plate, a disc plate 2 mounted on air bellows 3, an air cushion chamber 4, a vacuum 38 of the tank 5, an airtight elastic casing 6, elastic elements 7, a return cylinder 1, the distributor 9 and 10 and a source of compressed air 11 connected through a distributor 9 to a power cylinder 8 and through a valve 12 to a cavity 13 of a chamber 9; an airbag communicating through openings 14 with pneumatic cylinders 3. In cavity 15 of a hermetic casing 6 are placed anvils 16, mounted on the movable frame 1 and the intermediate plate 2. On the movable frame 1, a sealing gasket 18 is fixed along the perimeter 17, on which the latter rests, forming a closed cavity 19 connected by pipeline 20 through regulator 21 to pipe 22 connected to the vacuum source 23. The vacuum source 23 is also connected by pipes 22 and 24 through a vacuum container 5, a distributor 10 with a cavity 15 of an elastic hermetic casing 6. The vibrating board works as follows. A form 17 is mounted on the movable frame 1 and secured thereto by means of a vacuum clamp. In this case, the cavity 19 between the bottom of the mold 7 and the plane of the movable frame 1 is sealed with a gasket 18. Thereafter, the cavity 19 through the pipes 20 and 22 and the regulator 21 is connected to the vacuum pump 12 and the mold 17 when; chemise to the frame 1. In the initial position, the cavity 15 through distribution box 10 (working distribution channel is in position B) connect the atmosphere with the atmosphere. With the help of the elastic element 8 (PRUGSIN). or the ram 7 of the frame 1 is in its highest position, and the intermediate plate, 2 in its extreme position. In this case, the working channel of the distributor 9 (position A is connected by a source 11 of compressed air and compressed air enters the power cylinder 8. Air is supplied to the cavity 13 of the airbag chamber 4 through the regulator 12. The working cycle starts with the fact that 13 the air cushion chamber 4 is supplied with compressed air of the specified characteristic, which fills it and fills the air bellows 3 through the holes 14. At the same time, the movable frame with the form 17 rises to a predetermined height through its elastic connections, i.e. on the pneumatic support (air cushion). At the next moment, the working channel of the distributor 9 is set to position B and the working cavity of the cylinder 8 is connected to the atmosphere. At the same time, the working channel of the distributor 10 is set to position A and the cavity 15 is connected via pipeline 24 with a vacuum capacity 5, through a conduit 22, it is all the time connected to a vacuum source 23. In this case, vacuum is created in cavity 15. The movement of frame 1 due to gravity and atmospheric pressure forces acting on it rushes of. The intermediate plate 2 under the action of the elastic forces of the air cushion and the forces of atmospheric pressure rushes upwards. There is a collision of anvils 16, mounted on the frame 1 and the plate 2. The impact energy is transferred to the concrete mix — it is compacted. The next moment distributors; 9 and 10 are set to their original position. The cavity 15 is connected to the atmosphere, compressed air enters the cylinder 8, and the frame I and the wound 2 under the action of the elastic forces of the spring 7 or cylinder 8 move away from each other. The cycles are repeated periodically. By adjusting the air pressure in the air support (cushion) and the magnitude of the vacuum created in cavity 15, a different impact force of the frame 1 and plate 2 can be achieved, which provides a wide range of technological capabilities of the equipment - allowing different types of concrete to be molded in one type of equipment , for example, according to: The practical application of the present invention allows to simplify the design of shock vibration platforms on an air cushion, reduces air consumption during their operation, simplifies the system for adjusting the frequency and impact force, enhances safety. Claims of the invention: a platform containing a camera mounted on the base of the air pillows with air bellows communicating with it, on which an intermediate plate is supported, in contact with a movable frame by means of anvils, placed in a hermetic casing connected to a vacuum source, characterized in that, in order to reduce energy consumption and ensure stable operation, it is equipped with a distributor mi, intermediate vacuum capacity and power cylinder, size 56 A scaffold frame and an intermediate plate and connected to a source of compressed air through one of the distributors, and a vacuum source connected through another distributor and vacuum cleaner with a sealed casing. Sources of information taken into account in the examination . USSR Author's Certificate No. 659380, cl. B 28 B / 08, 1977.