SU1630905A1 - Device for stacking and packing items made from concrete mixtures - Google Patents

Description

(21) 4647773/33

(22) 12.22.88

(46) 28 02091. Bull. № 8

(71) Dnepropetrovsk branch of the Research Institute of Construction Production of the Gosstro of the Ukrainian SSR

(72) Yu.L.Izotov, N.P. Chuvpilo, N.G.Lapshin and V.A. Prusakov

(53) 693.546 (088.8)

(56) USSR Author's Certificate No. 334075, cl. B 28 B 13/00, 1967.

(54) DEVICE FOR LAYING AND SEALING PRODUCTS FROM CONCRETE MIXTURES

(57) The invention relates to construction and can be used in the manufacture of products from a concrete mixture by the method of vibroprotection. purpose

invention - increased productivity. This is achieved by the fact that in the device the width of the dispensing window of the hopper 7 exceeds the diameter of the rod oscillators 18 by 4-5 times, and the base 15 of the exciter 16 oscillations is suspended by means of flexible couplings 14 to the lower edge of the bunker, and the height of the latter is 1.2-1. 25 times the width of the distributor window, the distance between the longitudinal axes of the vibrating emitters 18 exceeds their diameter, and the number of core vibrating emitters 18 is determined by the formula n BH / 31m1g; B - width of the hopper's dispensing window; H is the height of the base of the exciter of oscillations. 1 dw., 2 tab.

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17 18 11

 The invention relates to the construction and can be used in the manufacture of products from concrete mixtures by the method of vibroprotection.

The purpose of the invention is to improve the performance of the device.

The drawing shows the proposed device.

The device consists of a movable portal 1, on which frame 2 is mounted with hydraulic cylinders 3 of vertical movement of the frame and wheels 4 for resting on the sides of form 5. On frame 2 through the damper device 6, a bunker 7 is mounted with a gate 8 and a device 9 for its horizontal movement 9. In the opening of the rear wall of the hopper 7, a smoothing vibrating plate 11 and a mechanism adjusted by means of a screw connection are mounted through flexible couplings 10. 12 vertical movements. In the lower part of the front wall 13 of the hopper 7 is fixed by means of a flexible link 14, the base 15 of the exciter 16 oscillations on which the inner side is rigidly fixed in staggered order on the uprights 17 of the rod vibrator 18, the number and dimensions of which are depending on the width hopper outlet 7.

The number and size of vibration emitters, as well as vibrating plates, are directly dependent on the width of the hopper's dispensing window and are expressed by the following dependencies:

H (1.2-1.25) V;

d (0.2-0.25) B;

VN

P- ;

 time,

where B is the width of the outlet

bunker; d is the diameter of the rod diluents;

H - the height of the plate; n is the number of thinners. The above dependencies were obtained experimentally. So to confirm the connection of the height of the vibrating plate with the width of the output leg, a whole series of experiments was carried out. With a constant width At the outlet, the height H of the plate was changed.

The ratio of these values (N / V) and the expiration time of 1 m3 of concrete mix of constant composition and stiffness from the device hopper are given in Table 1.

Table 1

As follows from the table. 1, the optimum ratio is a value of 2-1.25. This is due to the fact that as the height of the vibrating plate increases, the volume of the concrete mix affected by the vibrating plate increases, drives it to the thixotropic state and, thus, reduces the time it fully expires from the hopper. However, as the height of the slab increases further, the additional flow path of the concrete mix increases, which leads to an increase in time for its complete drainage.

Studying the radius of action of cylindrical vibrators of various diameters, i obtained the dependence R (5.0-5, 5) d where R is the radius of action; d - diameter of the vibrator.

Replacing the value of R with the width B of the dispensing window we obtain the dependence

du (0.1-0.25) b.

The number of internal vibration emitters is determined by the area (H "B), which is subject to vibration exposure, and is determined by the formula obtained experimentally

VN

zgz

P / S TT

As follows from the table. 2, the relative density of the samples will increase as the required number of vibration emitters is installed. As this amount increases, the concrete mix is jammed at the hopper's transfer window.

The device works as follows.

In the bunker 7 with the closed gate 8 serves the concrete mix. The movable portal 1 is moved to the beginning of the form 5. The hydraulic cylinders 3 lower the frame 2 until the wheels 4 are supported on the sides of the form 5. The vertical movement mechanism 12 sets the required thickness of the molded product. Then, the oscillation driver 16 is driven and the vibrating plate 11 is actuated. The gate 8 is opened, as a result of which 18 oscillations are transmitted to the entire mass of concrete directly at the hopper distribution window 7 under the influence of directional oscillations of the exciter exciter 16 the concrete mix thixotropically liquefies and begins to fill the mold 5. At the same time, the device begins to move relative to the mold 5 and is smoothing - the plate 11 distributes, shapes

table 2

a layer of a given thickness and compacted concrete mix in the form of 5.

Claims (1)

30, Formula of the Invention A device for laying and flattening of products from concrete mixtures, comprising a bunker mounted on the frame with horizontal rod vibrator radiators placed under the split, receptacle window and connected in a staggered manner with the base of the wobbler of oscillations and smoothing the vibrating plate , in order to increase productivity, the width B of the hopper's dispensing box is 4-5 times as large as the diameter of the core vibration emitters, and the base of the exciter is oscillated with oscillations m flexible connections to the lower edge of the bunker,. moreover, the height of the latter is 1.2-1.25 times the width B of the distributing window, the distance between the longitudinal Q axes of the vibration emitters exceeds their diameter, and the number n of rod vibration emitters is determined by the formula VN p- 3 where H is the height of the base of the exciter fluctuations; d - diameter of rod vibration emitters.