SU1511413A1 - Shotcreting apparatus - Google Patents

Abstract

The invention relates to construction and to the mining industry and can be used for the preparation and application of sprayed concrete. The purpose of the invention is to improve the quality of spray-concrete preparation. For this, the device has a water metering device, which consists of a drum 11 and a housing (K) 10, and the shafts located inside the tank 1 for storing the dry mixture components one above the other augers 2 and 5 are hollow and a water metering device is fixed at one of the ends of the upper screw 5 . At the same time, the K 10 dispenser is rigidly connected to the tank 1, and the drum 11 is installed inside the screw auger shaft 5. The drum 11 and K 10 have openings arranged to coaxially interact with them. The hole installed on K 10 is intended for supplying compressed air from a pneumatic gun 12. Ring valves 16 are installed on the outer surface of the lower screw 2, and between the turns of the screw there are 2 blades in the form of rods 9. A glass is installed on the free screw 2 interacts with the pneumatic chamber, over which it is located by means of coaxially arranged holes in them. By screw 2, the metering aggregate is delivered to the cement compartment of tank 1. From the cement compartment by screw 5, cement is dosed and fed to the loading compartment. A water dispenser prepares a portion of water, filling the drum 11. For one revolution of the screw 5, a portion of water enters the portion of cement through an opening in K 10. Mixing with cement, water under the action of compressed air in the form of cement milk enters the loading opening in the pipe 7. A filler is fed to this by the screw 2. 1 hp ff, 5 ill.

Description

(L

WITH

00

3151

screw 5 fixed dispenser water. At the same time, the K 10 dispenser is rigidly connected to the tank 1, and the drum 11 is installed inside the screw auger shaft 5. The drum 11 and K 10 have openings arranged to coaxially interact with them. The hole installed on K 10 is intended for supplying compressed air from a pneumatic gun 12. Ring valves 1b are installed on the outer surface of the lower screw 2, and between the turns of the screw, 2 blades are in the form of rods 9. A glass is installed on the free end of the screw, which interacts with the pneumatic chamber above which the Invention relates to the construction and mining industries and can be used to prepare: and apply a spray-concrete mixture to the surface of structures and mine workings.

The aim of the invention is to improve the quality of the preparation of sprayed - concrete.

FIG. 1 schematically shows the proposed device with a longitudinal section along the ends of the screw; FIG. 2 shows a longitudinal section of the device, enlarged; in fig. 3 shows section A-A in FIG. one; in fig. - node I in FIG. one; in fig. 5 - section BB on

FIG. t.

I.

The spraying device is a tank 1 with compartments for the components of the concrete mix mounted on a carriage. The screw 2 is connected to the drive at one end, and the second is secured by gear 3, which interacts with the neck 4 attached to the screw 5 installed in the cement compartment. At the end of the screw 2, the glass 6 is fixedly fixed with two coaxial holes. The end of the screw 2 is placed in the pipe 7 with a connector in the form of a half cylinder covered by a lid 8. The end of the screw 2 is equipped with rods 9 placed along the helix between the turns of the screw 2 so that they protrude on both sides of the shaft. The end of the screw 5 is provided with a water dispenser consisting of a body 10 fixed in the tank 1 and a drum 11 rigidly

four

with by means of coaxially located holes in them. A screw 2 metering aggregate is delivered to

the cement compartment of the tank 1. From the cement compartment by screw 5, cement is dosed and fed to the loading compartment. A water dispenser is preparing a portion of water filling the drum 11. For

one turn of the screw 5 in a portion of cement through a hole in K 10 gets a portion of water. Mixed with cement, the water enters under the action of compressed air in the form of cement milk.

in the loading opening in the pipe 7. A filler is fed here by the screw 2. 1 hp f-ly, 5 ill.

five

0 d

0

five

screw auger fastened to the shaft 5. At the end of tank 1, there is a pneumatic gun 12. Pneumatic chamber 13 is located under cup 6. Plunger 15 is screwed into the pneumatic chamber 13. The pipe from the pneumogun 12 through the rotor 1. .) tightly with rubber O-rings, simultaneously inserted inside the part of the drum 11. On the part of the screw 2 located in the filling compartment, there are three ring valves 1b, each with one hole (Fig. 1 and 3). the valves 16 are fixed on the turns of the screw and on three spokes 17 each. Ring valves 16 cover the bottom of the constricted part of the bottom of the tank 1, having the bottom shape of a semi-cylinder of small diameter. In the constricted lower part of the bottom of the tank 1, opposite to each annular valve 1b there are openings to which pipelines from one air gun 12 are connected (Fig. 3)

The device works as follows.

The screw 2, the metering aggregate, delivers it from left to right to the cement compartment. From the cement compartment, cement 5 is dosed out by the screw 5 and is fed to the loading opening. A water dispenser is preparing a portion of water, filling the drum 11 for one screw of the screw 5 and corresponding to the volume of cement delivered by one turn of the screw 5 at a ratio of / c 0.5. When one opening of the drum 11 coincides with the opening for feeding

one

compressed air, and the second with a drain, then water, flowing out and mixing with cement, is blown in the form of cement milk through a loading opening into pipe 7i where screw 2 moves the aggregate. The cavity is filled with a concrete mixture by screw 2 (FIG. 1) through pipe 7, repeatedly mixed by rod 9, is fed to glass 6 (FIG. 2). Through the holes in the glass by 6 pneumatic explosions from the pneumatic gun 12 through the upper hole, the concrete mixture is fed from above into the pneumatic chamber 13. When the hole in the rotor 14 coincides with the pipeline running to the side, into the pneumatic chamber 13, periodically once per screw rotation, the mixture blows through material sleeve and nozzle (not shown). In the process of spraying-concreting, the elimination of material hang-ups is performed automatically. Along the auger 2, three annular valves 1b are installed, evenly along the length of the portion of the tank 1 filled with aggregate. In order for valves 1b to be turned on non-simultaneously, the opening of each of them is offset relative to the previous one by 36oV3 120 °.

Air guns through each of the three valves 1b are made in series, three times per screw auger, when the holes in the valves 16 coincide with the holes in the bottom of the tank 1, to which the pipelines from the air gun 12 are connected.

The w / c is controlled by the plunger 15 before switching on the machine in operation by changing the capacity of the drum 11 by inserting the plunger 15 into the drum 11.

11 (13

If necessary, clean

the end of the screw 2, through which the mixture is moving, the cover 8 is removed.

Claims (2)

1. A device for sprayed-on concrete, including a container for storing components of a dry mixture, an actuator mounted on the outside of the container and interacting with screws located inside the container 15 one above the other in parallel, a pneumatic chamber connected to a pneumatic gun, characterized in that, in order to improve the quality of the preparation of sprayed concrete, the device is equipped with a water dispenser, which is sealed in the form of a drum and casing, and the shafts of screws made hollow, while the water dispenser is fixed on one of the ends of the shaft of the upper screw, 25 wherein the dispenser housing is rigidly coupled to the container, and the drum is mounted inside the screw shaft and rigidly clamped. flax with the latter, while the water dispenser drum and its body have from 30 40 verstied with the possibility they coaxially interact with each other, and one of them, located on the body, is associated with an airgun, while the outer surface of the shaft of the lower auger is provided with annular 35 valves and rods located between the turns of the auger. 2. The device according to claim 1, wherein the lower screw has a cup at a free end of the shaft fixedly mounted above the pneumatic chamber with the possibility of their interaction with each other by means of coaxial orifices located in the cup and. -five " rJ fui.Z 15 (Reg. 4 A-A .3 Phi2.5