SU1222795A1 - Shotcreting apparatus - Google Patents

Description

The invention relates to construction, in particular to devices for applying shotcrete, and can be used in the manufacture of concrete works.

The purpose of the invention is to improve the performance and reliability of the device in operation.

On fi | -. 1 shows a guncrete application device, general view; in fig. 2 shows section A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; on fi1. 4 — node I in FIG. one.

The device contains a vibrating hopper 1 with a flap shutter 2 and a pneumatic vibrator 3, carrying the carriage 4, the vibrating device mounted above the loading opening works as follows.

When the shutter 2 is closed, a dry concrete mix is loaded through the sieve 5 into the vibrating hopper 1. After this, the compressed air is supplied from the air duct 9 to the tip 8 of the ejected tube 7 and partially discharged from it through the nozzle 21 and the pneumatic chamber 20 to the confuser channels 19 of the conical nozzle 18 Then the shutter 2 opens, and compressed air is fed into the pneumatic vibrator 3 of the vibrating hopper 1, from which, when vibrated, the dry concrete mix enters the funnel 15, in which it is evenly distributed by the flap 16. From the funnel 15 of ha, the concrete mix enters the channels obliquely installing the 1 sieve 5, which is located the inclined lengthened tubular element 14, and from the floor of the vibrating hopper 1, the output end to the bottom of the ejection chamber 6 with the injector tube 7, having an end 8 at one end and connected to the air end 9 of the compressor at one end (not shown), a displacement chamber 10 with a diffuser 11, connected to the outlet end of the ejection chamber 6, and a material pipe 12 connected to the diffuser 11 with a nozzle 13. A propeller is placed in the ejection chamber 6 into a conical nozzle 18. air that blunt through confused channels 19 loosens the dry concrete mix in the conical nozzle 18 from the bottom upwards, and it doesn’t let the concrete mix inside it. In the loosened state, the dry concrete mixture is entrained by the air flow coming out of the tip 8 of the ejected tube 7, by creating a discharge inside the tubular element 14. The starting element 14 leaving the tapering element, at one end of which is 25 cage 18 dry concrete

The hopper 15 is installed with a hinged flap 16, the longitudinal partitions 17 are radially located inside it, and a tapered nozzle 18 s is fixed at the other end of the tubular element 14

the mixture creates a discharge in chamber 6, which, together with the inclined position of this chamber, contributes to the removal of dry concrete mix that was not included in the funnel 15 of the tubular element 14. Next, the flow

air confusing air into it with a dry concrete mix enters the

channels 19, formed at the bottom of its wall and located at an acute angle to the axis of the conical nozzle 18 in the direction to its outlet. The tubular element 14 is mounted in an ejection chamber 6. with an inclination, moreover, it is placed in it with a funnel 15 upwards under the folding shutter 2 of the vibrating hopper 1 and oriented with a cone attachment 18 to the displacement chamber 10. At the same time, the ejection tube 7 is located in the tubular element 14 coaxially with it with the possibility of contacting with its longitudinal partitions 17 with which it forms inside the tubular element 14 channels for supplying dry concrete mix.

In order to supply compressed air to the confuser chamber 10, a displacement tank where the dry concrete mix is finally mixed with air and from where it is in the aerated state through the diffuser 11, which reduces the flow rate, is introduced into the material-Baud 12 and from it into the nozzle 13, in which wetting dry concrete mix.

The moistened concrete mixture is ejected at high speed from the nozzle and applied on the surface to be concreted in the form of a layer: gunned concrete.

The design of the proposed device provides for the possibility of continuous

Conical channels 19 cone nozzle 18 has its work by preventing the air chamber 20 from having a tension pipe 21, which is connected to the ejection tube 7, and a water pipe 22 is attached to the nozzle to moisten the dry concrete mix.

Research Institute of units, more complete use of the kinetic energy of compressed air, which allows to improve the performance of the device, and the reliability of its work.

The device works as follows.

When the shutter 2 is closed, a dry concrete mix is loaded through the sieve 5 into the vibrating hopper 1. After this, the compressed air is supplied from the air duct 9 to the tip 8 of the ejected tube 7 and partially discharged from it through the nozzle 21 and the pneumatic chamber 20 to the confuser channels 19 of the conical nozzle 18 Then the shutter 2 opens, and compressed air is fed into the pneumatic vibrator 3 of the vibrating hopper 1, from which, when vibrated, the dry concrete mix enters the funnel 15, in which it is evenly distributed by the flap 16. From the funnel 15 is dry concrete mixture enters the channels obliquely installed tubular member 14, and from it - in the conical nozzle 18. The incoming channels 19 through the convergent air disintegrating a dry concrete mixture into the bowl 18 from the bottom upwards, without va da s settle therein. In the loosened state, the dry concrete mixture is entrained by the air flow coming out of the tip 8 of the ejected tube 7, by creating a discharge of air inside the tubular element 14. The air flow from the cone nozzle 18 is air flow from the dry concrete

the mixture creates a discharge in chamber 6, which, together with the inclined position of this chamber, contributes to the removal of dry concrete mix that was not included in the funnel 15 of the tubular element 14. Next, the flow

air with a dry concrete mix enters

 air with a dry concrete mix enters

The chamber 10 is displaced, where the dry concrete mix is finally mixed with air and from where it is in the aerated state through the diffuser 11, which reduces the flow rate, is introduced into the material-Baud 12 and from it into the nozzle 13, in which the dry concrete mix is moistened.

The moistened concrete mixture is ejected at high speed from the nozzle and applied on the surface to be concreted in the form of a layer: gunned concrete.

The design of the proposed device provides for the possibility of continuous

 its operation by preventing blockage of the nodes, more complete utilization of the kinetic energy of compressed air, which allows to improve the performance of the device, and the reliability of its operation.

A- A /

Figg

6-6

17

Fig.Z

sixteen

anal /

21

when

Editor S. Saenko Order 1679/30

Compiled by B. Lebedev

Tehred I. VeresKorrektor G. Reshetnik

Circulation 728Podisisoe

VNIIPI USSR State Committee

for inventions and discoveries

1 13035, Moscow, Zh-35, Raushsk nab. 4/5

Branch PPP "Patent, Uzhgorod, st. Project, 4

Claims (1)

DEVICE FOR APPLYING TORCRET CONCRETE, containing a vibrating hopper with a shutter, an ejection chamber with an ejected tube, a mixing chamber, material pipelines and a nozzle, characterized 0ig. 1 in that, in order to increase productivity and reliability in operation, it is equipped with a tubular element with longitudinal partitions radially located in it and a funnel mounted on one of its ends with a shutter pivotally mounted in it, fixed at the other end with a conical nozzle with air-ducting confuser channels located at an acute angle to its axis in the direction of the outlet, and the tubular element is mounted with a slope in the ejection chamber, its funnel is placed under the shutter of the hopper, and usny nozzles directed to the mixing chamber, the tube is ejected in a tubular element coaxial to it and to come into contact with its longitudinal § partitions. ~ SU „„ 1222795