SU617269A1 - Mortar mixture continuous mixing/pumping unit - Google Patents

Description

one

The invention relates to devices for preparing building mixtures by driven mechanical means and transporting the resulting mortar mixture to the site of use, it can be used in construction and mining for the preparation and injection of mortar mixture, mainly gypsum with water.

A device for continuous mixing and injection of the mortar mixture is known, which has a screw pump and a mixer fixed to the suction port of the pump. The mixer contains buixr and a perforated tube placed inside it. The lower part of the bunker in the perforation zone of the tube is a mixing chamber where the dry plaster loaded is displaced with water due to the special arrangement of the holes in the tube. The mortar mixture from the mixing chamber is sucked in by pump 1.

However, in this device, mixing the mortar mixture on the inner walls of the mixing chamber leads to a decrease in its cross section. In connection with this, the amount of gypsum entering the displacement decreases and, consequently, the ratio of the amount of water to gypsum in the mortar mixture increases, i.e. the quality of the mixture deteriorates.

Closest to the invention is a device for the continuous displacement and injection of the mortar mixture, which contains the working body in the form of a screw pump with a paddle shaft mounted coaxially, a hopper with a charging nozzle and a diffuser on the nozzle, a housing with a mixing chamber and water supply nozzles. The loading nozzle and the upper part of the body form an annular space with an annular gap between the edge of the diffuser and the inner wall of the body,

allowing to obtain a float of water along the inner walls of the mixing chamber, creating a kind of “water jacket” into which the flow of dry gypsum from the bunker is enclosed.

The flow of water along the walls of the mixing chamber prevents the mortar 2 from sticking to them 2.

The disadvantage of such a device lies in the low quality of the displacement of gypsum with water due to the uneven wetting of dry gypsum due to the fact that its flow from the loading nozzle before mixing is cut by only one water jet from a nozzle installed in the lower part of the mixing chamber to the frontal paddle shaft .

The purpose of the invention is to improve mixing.

This is achieved by the fact that in the device, which includes a housing with a mixing chamber, a working body in the form of a screw pump with a coaxially mounted impeller shaft, a loading nozzle forming an annular space with the upper part of the housing, a nozzle for supplying water to the annular space n installed in the lower part of the chamber water supply nozzle, the loading nozzle in the lower part is made conical with trapezoidal grooves, and the nozzle is in contact with the housing.

Such an embodiment of the feed-in pipe makes it possible not only to get a continuous flow of water along the inner walls of the casing, which prevents the gnns from building on the walls of the mixing chamber, but also to cut the flow of dry gypsum with a large number of water jets and, therefore, evenly moisten it before the working tool, after which ; produce high-quality mixing of the components.

FIG. 1 shows the proposed device, a general view; in fig. 2 - housing with mixing chamber, longitudinal section; in fig. 3 is a view along arrow A in FIG. 2; in fig. 4 shows but arrow B in FIG. 3

The device contains a single-screw pump 1, a hopper 2 with a loading nozzle 3, a housing 4 with a mixing chamber, a nozzle 5 for supplying water and a nozzle 6, a shaft 7 with blades fixed to the end of coil 8 of pump 1. The pump 1 is coupled to an electric motor 9.

The nozzle 6 is installed in the lower part of the mixing chamber of the housing 4 for supplying water to the vane shaft 7 of the front.

The boot nozzle 3 forms with the upper part of the body 4 an annular space filled with water. Through the nozzle 5. The nozzle 3 in the lower part is made conical with trapezoidal slots

forms. The number of grooves and their cross-section in shape and size are chosen so that the neighbors of the water jet intersect each other before they encounter a note of dry gypsum coming out of the loading pipe 3. The conical surface of the pipe 3 fits without a gap to the conical surface top of housing 4.

The device works as follows.

In the mixing chamber of the housing 4 through the pipe 5 and the nozzle 6 supply water and include the electric motor 9 of the pump 1. Bunker

2 are continuously filled with gins, which, however, the feed nozzle 3 enters the mixing chamber. A uniformly moistened gypsum stream is moved by the shaft blades 7. The resulting mortar

the mixture is sucked from the chamber by a screw pump 1 and is injected through the pipeline to the place of its use.

The use of the proposed device allows to increase the strength of structures.

from a gypsum mortar by an average of 18%.

Claims (2)

Invention Formula A device for continuous mixing and pumping of a mortar mixture, mainly gypsum with water, comprising a housing with a mixing chamber, a working member in the form of a screw pump with a coaxially mounted lamellar shaft, a loading pipe that forms an annular space with the upper part of the housing, a pipe to supply water to the annular space and a water supply nozzle installed in the lower part of the chamber, characterized in that, in order to improve mixing, the loading nozzle in the lower part is made conical with the slots of the ladder eidalpoy shape, the sleeve is in contact with the housing. Information sources, taken into account during the examination 1. R. Muller. Hydromechanical method of erection of saarlite-bergbaugs, “Glukauf, No. 15, 1972, p. 6-7. 2. USSR author's certificate No. 484295, cl. In 28C 5/14, 1971. Rig. 2 ffaffff FIG.