SU1502883A2 - Device for applying concrete mix by compressed air - Google Patents

Abstract

The invention relates to construction. The purpose of the invention is to increase productivity. The device comprises a movable frame 1 with a bell 2 and a hopper 3 placed inside it with a discharge pipe 4. When the movable frame 1 is moved, the device is installed near the surface to be treated. The compressed air is supplied and the vibrators 7 of the vibrating plate 6 are turned on. The spinning air flow from the nozzle with screw blades in the ejection chamber forms a vacuum. Through the vibration of the hopper 3 on the vibrating plate 6, the concrete mixture from it enters the discharge pipe 4, forming therein a metered uniform flow as it passes through the narrowed and widened part of its opening. From the discharge nozzle 4, the concrete mixture under the influence of vacuum in the ejection chamber 9 is sucked into it, twists and then, together with the compressed air, through the material pipe 11 is transformed into the nozzle 12, from which, at high speed, a uniform torch is applied to the surface to be treated. 2 Il.

Description

IND

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 14)

3150

The invention relates to building; it can be used to spray concrete and mortars onto the surface of concrete and reinforced concrete surfaces and is an improvement of the invention according to Aut. No. 1038443.

The purpose of the invention is to increase productivity.

FIG. 1 shows a pneumatic spraying device for concrete mixtures; general view; in fig. 2 — node I in FIG. one.

The device contains a movable frame 1, a bell 2, a bunker 3 placed inside the socket, and a discharge pipe 4, which by means of the gaskets 5 form an annular gap with it. The discharge pipe of the bunker is made with a hole narrowed in the middle part and has a curved inner surface. The trumpet is mounted on a shaker 6, equipped with vibrators 7 and coupled springs of an ammonia 8. The ejection chamber 9 is tangentially connected to the neck 10 and to the narrow part of the socket, and through the built-in diffuser and material pipeline 11 - to the nozzle 12. Supply compressed air into the ejection chamber is carried out through the air duct 13 and the nozzle 14, inside which I have screw blades 15 installed.

The device works as follows.

By means of the movable frame 1, the device is installed near the surface to be treated. The compressed air is supplied to the air duct 13 and the vibrators 7 of the vibratory plate 6 are turned on.

Using a swirling flow of air flowing out of the nozzle 14

with screw blades 15, a vacuum is formed in the ejection chamber 9.

Through the vibration of the hopper 3 on the vibrating unit 6, the concrete mixture from it enters the discharge pipe 4, forming in it a metered uniform flow when the narrowed and expanded part of its opening passes. From the discharge nozzle 4, the concrete mixture under the influence of vacuum in the ejection chamber 9 is sucked into it, twists and then, together with the compressed air, is transported through the material pipe 11 into the nozzle 12, from which, at high speed, with a uniform torch, is applied to the surface to be treated. With this, through the annular gap between the bell 2 and the discharge pipe 4 of the bunker 3, some amount of air is drained from the outside, by means of which the reverse turbulent air flows in the ejection chamber 9 are obstructed, preventing the concrete mixture from being evenly fed.

Due to the swirling flow of the dry mixture into the ejection chamber and the vortex motion in the ejector, the performance of the shotcrete machine increases compared with the existing ones.

Claims (1)

Invention Formula Pneumatic spraying device - concrete mixtures according to auth.St. No. 1038443, characterized in that, in order to increase productivity, the ejection chamber is attached tangentially to the vibrobunct nozzle and the air nozzle located in the ejection chamber is made with fixed blades mounted on the inner surface of the nozzle exit part. FIG. 2