SU937144A2 - Vibration table for compacting concrete mixtures - Google Patents

Description

(54) VIBRATION PLATFORM FOR SEALING CONCRETE MIXTURES IN THE FORM

one

The invention of otosit for the production of products from precast concrete and reinforced concrete.

According to the main author. St. No. 611777 known vibroplatform for compacting concrete mixes in a mold containing a movable frame mounted on elastic supports with a central window to which a hammer with vibration oscillator and buffer elements is suspended by elastic elements and the vibration exciter is electromagnetic and its measles is placed in the movable window frame and fixed to the bottom of the form 1.

The drawbacks of the device are the poor quality of the molded products and low productivity.

The purpose of the invention is to intensify the compaction process and increase the quality of the molded products.

The goal is achieved by the fact that in the vibroplatform for compacting concrete mixes in the shape of a drummer there are hydrochambers connected to a pressure source through drainage and pressure pipelines with membranes on which buffer elements are fixed.

The drawing schematically shows the proposed vibroplatform, a general view.

The vibrating plate contains a movable frame 1 mounted on elastic supports 2. To the movable frame on elastic elements .3 a drummer 4 is placed on which the electromagnetic exciter 5 oscillations are mounted. The movable frame 1 is made with a window 6 located against the 5 electromagnetic oscillation driver. The anchor 7 of the electromagnetic vibration exciter is placed in the window 6 and fixed on the bottom of the mold 8, freely mounted on the movable frame 1. On the impactor there are hydro chambers 9 with membranes 10 on which the buffer elements 11 are fixed. Between the buffer elements and the movable frame there is

15 clearance. Hydraulic chambers 9 are connected to a pressure source (not shown) by means of a drain 12 and a pressure 13 pipelines via a switch 14.

The vibrating platform works as follows.

On the movable frame 1 set the form 8 with a mixture to be compacted.

A pulsating current is supplied to the electromagnetic exciter 5, the constant component of which provides the clamping of the mold 8 to the movable frame 1, preventing the mold from tearing off the frame. The variable component of the pulsating current excites oscillations of the striker 4, anti-phase oscillations of the form 8 and the frame 1.

At the beginning of the sealing process of the hydraulic chamber 9, the switch 14 is connected to the pressure pipe 13. The working fluid entering the chambers shifts the buffer elements 11 upward, reducing the gap. At a given pulsating current, oscillations of the striker 4 begin to be accompanied — with the blows of the buffer elements 11 against the frame 1 with the shape 8, which contributes to the intensive compaction of the mixture.

At the final stage of the compaction process, the hydraulic chambers 9 are disconnected from the pressure pipe 13 by a switch 14 and connected to a drain pipe 12. The buffer elements 11 return to their original position. The gap increases and the oscillation of the striker 4 and form 8 at the same pulsating current value

unaccented, which excludes stratification of the mixture, violation of its density.

The use of the proposed vibroplatform will allow to intensify the compaction process and improve the quality of the molded products.

Claims (1)

Invention Formula Vibration platform for compacting concrete mixtures in the form according to ed. St. No. 611777, characterized in that, in order to intensify the process and increase the quality of the products by adjusting to the optimum mode, the striker is provided with hydrochambers with diaphragms on which the buffer elements are attached to the pressure source, Sources of information taken into account during the examination 1. USSR Author's Certificate No. 611777, cl. B 28 B 1/08, 1976.