SU1031534A1 - Pneumatic vibrator - Google Patents

Abstract

1. A pneumatic actuator comprising a cylindrical body with supply and discharge channels, in the cavity of which a slider is placed in contact with its top axial protrusions, characterized in that it is equipped with a sleeve located at the bottom of the body made with symmetrical annular grooves on the ends, and the lower end of the body - with an additional channel; the upper part of the sleeve is placed in the lower annular groove of the slider. 2. Pneumatic vibrator according to claim 1, characterized in that the sleeve is made of an anti-friction material. (P c

Description

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This invention relates to the manufacture of concrete products.

A device for compacting a concrete mix is known, comprising a housing with inlet and outlet openings and debalance with axial ynoiia-5 Cl.

The disadvantage of this device lies in the complexity of the design, due to the large number of channels, grooves and grooves in the core of the vibrator, and inadequate reliability, since the unbalance during rotation of the third of the device faces the device.

Closest to the proposed j pneumovibrator is a device for compacting concrete; a housing with inlet and outlet openings and central stops and unbalance with axial stops at the ends 23.

The known device is ineffective for vibrators with a large kinematic moment of unbalance, since a significant part of the input energy is spent on overcoming the HVie friction force arising between the unbalance and the body at the initial moment of rotation.

The purpose of the invention is to increase work efficiency. thirty

This goal is achieved by the fact that a pneumatic vibrator comprising a cylindrical body with supply and discharge channels, in the cavity of which a slider is placed contacting with its end axial protrusions is provided with a sleeve disposed at the bottom i of the body; the ends, and the lower end of the housing 40, with an additional inlet channel, the upper part of the sleeve being placed in the lower annular groove of the slider.

In addition, the sleeve is made of

45

anti-friction material.

FIG. 1 shows a pneumatic vibrator, a general view of FIG. 2 is a section A-A in FIG. one.

The pneumatic vibrator includes a cylindrical body 1 with inlets 2 50

and discharge 3 channels and nozzles 4. A slider 5 is placed in the cavity of the cylindrical body 1, contacting with its end axial projections b and 7.

The slider 5 is made with symmetrical annular grooves 8 and 9 at the ends and contacts its central part 10 with the end axial protrusions 6 and 7. The lower end of the cy-; Lindrical body 1 is made with an additional air passage 11.

The pneumatic vibrator is equipped with a sleeve 12 made of antifriction material and freely mounted in the lower annular groove 9 of the slider 5. When operated, the sleeve 12 rests on the bottom end axial protrusion 7 of the housing 1 and the seal between the housing 1 and the slider 5.

The device works as follows.

The device is attached to a mold filled with concrete. Through the pipes 4, compressed air is supplied, which enters the housing 1 through the supply ducts-2. The slider 5 under the action of jets of compressed air begins to move in the housing 1. At the same time, the central parts 10 of the slider 5 surround the end axial projections 6 and 7 of the housing 1. At the same time, the compressed air from the nozzle 4 enters the additional air passage 11 and further under the slider 5 , causing it to rise as a result of an increase in pressure in the groove 9. At the same time, the sleeve 12 remains on the housing, sealing between the housing 1 and the slider 5 and thereby preventing air from leaking out of the groove 9. When raising the slide 5, the friction against the housing 1 decreases, resulting This increases the efficiency of the device. The movement of the slider 5 causes the vibration of the housing 1, providing a dilution and compaction of the concrete mix. The exhaust air through the exhaust ducts 3 enters the atmosphere.

Thus, the proposed design of a pneumovibrator will increase its efficiency.

Claims (2)

1. A PNEUMO VIBRATOR comprising a cylindrical body with inlet and outlet channels, in the cavity of which there is a runner in contact with its wrestling axial protrusions, characterized in that, in order to increase work efficiency, it is provided with a sleeve located in the lower part of the body, the runner is made with symmetrical annular grooves at the ends, and the lower end of the housing with an additional supply channel, and the upper part of the sleeve is placed in ¹ lower annular groove of the runner. 2. Pneumatic vibrator according to π. 1, characterized in that the sleeve is made of antifriction material.