SU1395497A1 - Vibratory platform - Google Patents

Abstract

The invention relates to the production of precast concrete and reinforced concrete products and allows to intensify the compaction process and to improve the quality of the molded products due to polyfrequency vibrations. This is achieved by the fact that the vibrating area includes a working body 1 mounted on the base 3 by means of elastic supports 2, a hydraulic exciter and inertial masses 9 and 10. The exciter is composed of upper and lower sections placed in a common body 4. the outer ends of the pistons 5 and 6 of which are fixed respectively inertial masses 9 and 10. The housing 4 is placed under the working body 1 and is rigidly connected with it. 1 il. (L 00 co 4el CP 3

Description

 I

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

The purpose of the invention is to intensify the compaction process and improve the quality of the molded products due to polyfrequency vibrations.

The drawing shows vibroplatform, longitudinal section.

The vibrating platform consists of a working body 1j mounted on the base 3 by means of elastic supports 2, and located under the working body 1 and rigidly connected to a hydraulic vibration exciter, made of a composite of upper and lower sections placed in a common body 4, each of which includes, respectively, power pistons 5 and 6 connected by rods 7 and 8 to inertial masses 9 and 10 ,,, regulators in the form of distribution sleeves 11 and 12, inside of which there are gold13

NIKI 13 and 14, subjugally connected with piston 5 and 6 by means of rods 15 and 16 with limit stops 17 and 18,

Distributor sleeves 11 and 12 are made with annular grooves 19 and 20, connected by a pressure pipe 21 to a hydraulic pump 22, and annular grooves 23-26 connected by a drain pipe 27 to a tank 28. Rod cavities 31 are connected to the slide valve 32. Zokhutniki 13 and 14 are made with an annular recess 33 Nabokovoy surface connected to the grooves 34 through the channels 35.

A safety valve 36 is installed between the pressure pipe 21 and the drain pipe 27. A pressure divider 37 is placed in the pressure pipe 21, which distributes the working fluid from the hydraulic pump 22 to the distributor klugs 19 and 20: bushings 11 and 12

The vibrating platform works in the following way.

Inertial masses: 9 and 10. Move pistons 5 and 6 and spools 13 and 14 to the lower position. In this case, the annular grooves 19 through the through channel 35 in the spool 13 are connected to the cavity 38 of the upper section of the hydraulic exciter, and the annular groove 20 through the through channel 35 at

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the lower spool 14 through the roller 32 and the pipe 30 are connected to the cavity 31 of the lower section of the hydraulic exciter. The annular groove 24 is connected to the cavity 31 of the upper section, and the groove 26 is connected to the cavity of the lower section of the hydraulic exciter.

When the hydraulic pump 22 is turned on, the working fluid flows through the pipe 21 to the flow divider 37, which distributes it to the annular channels. navkah 19 and 20 in the distribution bushings 11 and 12 of the controller. Next, the working fluid enters the cavity 38 of the upper section and the cavity 32 and 31 of the lower section of the hydraulic exciter. The spools 13 and 14 are displaced in the lower position to the restrictive stops 17 and 18 on the rods 15 and 16. The pistons 5 and 6 begin to move up and move the spools 13 and 14 up to the neutral. The working fluid from the cavity 31 of the upper section through the pipe 29, the cavity 32, through channels 35 in the spool is forced into the annular groove 24 and further along the pipeline 27 into the tank 28. From the cavity 38 of the lower lower section the liquid is forced into the tank 28 through through channels 35 in the lower spool 14 and the annular groove 26. The spools are shifted to the neutral, and thanks to the inertia of masses 9 and 10 - above it. When this ring groove 19

connects with cavities 32 and 31 of the upper section of the cylinder, and a groove 20 tons with a cavity 38 of the lower section. Correspondingly, the cavities 38 of the upper section and 31 of the lower section are connected to the tank 28. The spools 13 and 14 are transferred to the lower position defined by restrictive stops 17 and 18 on the rods 15 and 16. The pistons 5 and 6 begin to move down and move the spools again to neutral. Thus, oscillations of inertial masses 9 and 10 are created. The distances on the rods 15 and 1.6 between the restrictive stops 17 and 18 are a gap in the feedback links, and since these distances are different, the frequency of the oscillations of the masses 9 and 10 also different. The smaller the feedback gap, the higher the oscillation frequency.

Thus, on the housing 4 of the hydraulic exciter and at work

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Claims (1)

than organ 1, the oscillations are aggregated by a ring, ring grooves on the sides of two different frequencies. your surface is connected to the grooves through the channels, and the formula of the invention is connected to the piston by means of a rod with a restrictive vibration table, which is provided with washable supports, characterized by a base, in that, in order to intensify the elastic supports, the working member and the seal sizes and to increase the hydraulic excitability under it on the molded parts the oscillation maker, upper and lower: total vibration, its supply, the cavities of which are connected to the hydronan by inertial masses, the causative agent by means of pressure and discharge vibrations is made of different pipelines through the upper sections regulated in the common case and in the form of the lower sections installed in the exciter 15, the outer ends of the piston bushing forks of the pistons are fixed with inertial grooves and the event masses are placed axial valve spool with a working body.