SU1260195A1 - Vibrated platform - Google Patents

Description

The invention relates to well-developed industry and can be used primarily for the production of concrete and reinforced concrete structures, as well as in other branches of the national economy for various materials.

The purpose of the invention is to increase reliability and ease of operation.

Figure 1 shows the vibratory area; a general view; figure 2 - structural scheme of the exciter.

The vibrating platform contains a movable frame 3 mounted on the base 1 by means of elastic elements 2 in the form of pneumatic supports and a drummer 4 placed under it, which are in contact with each other through elastic buffer elements 5. Vertically directed oscillations are fixed on the impactor 4. The latter is made in the form of an annular body 7 fixed on the hammer 4, covering the last cup 8 with a split skirt 9.

On its inner surface is fixed friction elements 10. In addition, the glass 8 covers the article on the yoke 11, and the end cap 1,2; connected by a perimeter by means of an elastic cuff 13, forming a force chamber 14 with the cup 8. The force along the shaft of the friction elements 10 to the ring body 7 is chosen from the condition

,

where p is the maximum force developed by a power chamber J P is the maximum force of interaction between the hammer and the moving frame,

f is the coefficient of friction. The compressed air is supplied to the exciter 6 through the pneumatic valve 15 through the duct 16.

The operation of the exciter and elastic elements is controlled from an off-site control panel. The console is equipped with valves, pressure gauges, a pressure reducing valve for pneumatic pressure control valves and an electric control unit for operating a pneumatic valve.

The vibrating platform is configured for operation as follows.

Compressed air is supplied to the elastic elements 2, the pressure is adjusted to a value that provides a complete choice of the gap inside the oscillator between the end cap 12 and the glass 8, the initial gap S between the buffer elements 5 and the moving frame 3 is chosen from 0.02 m (01m) The clamping ring 11 is then weakened until the friction elements 10 begin to slip relative to the annular body 7.

The pressure in the elastic elements increases to a level that ensures that the gap decreases to zero, and then with the help of the clip 11, the glass in the region of the slits together with the friction elements 10 is pressed against the ring body with a force F, the value of which is

 ,

The platform works as follows.

Turn on the compressed air supply into the elastic elements 2, which raise the drummer 4 until the buffer elements 5 are pressed against the movable frame 3. Then, the last form is set to 0 with a concrete mix. The compressed air supply to the exciter 6 exciter is turned on, which is pressed down by the impactor 4, overcoming the elasticity of the elastic elements 2, in which the pressure rises and potential energy accumulates.

0

five

five

When the striker reaches a certain position, the pneumatic valve 15 is activated, air is exhausted from the exciter 6 oscillations and the compressed elastic elements force up the striker 4, which hits the bottom with buffer elements 5

on the movable frame 3, the latter transmits a blow to the form with a concrete mix. Then oscillations occur on the elastic gaskets, by means of which the frame is fixed on the foundation.

50

55

At the moment of impact, the pneumatic valve 15 is again activated, compressed air is introduced into the exciter 6 oscillation and the cycle: repeats with a frequency of 2-3 strokes per second.

. 2

Claims (1)

VIBRATION AREA, containing a movable frame mounted on the basis of elastic elements and in contact with each other through elastic buffer elements and a striker placed under it with a vertical exciter, which is characterized by the fact that, in order to increase reliability and ease of use, the pathogen of vertically directed oscillations is made in the form of an annular body fixed to the drummer, covering the last glass with a split skirt, frictional mounted on its inner surface elements, a retaining clip and a headband connected around the perimeter by means of an elastic cuff forming a force chamber with a glass, and the force F of compressing the friction elements to the annular body is selected from the condition p / f <F <P / f, where p is the maximum force, developed by the power chamber; P is the maximum force of interaction of the striker with the moving frame; f is the coefficient of friction. SU. „, 1260195