RU213653U1 - concrete mixer - Google Patents

Abstract

The utility model relates to the construction industry and can be used for the preparation of concrete and mortar. A concrete mixer containing a fixed cylindrical body in the form of a mixing bowl with a bladed mixing body of a rotary type, cleaning scrapers and a drive, characterized in that a cover is installed on the mixing bowl, in which loading windows are made for separate loading of inert materials and cement, an inspection hatch and a branch pipe for pouring dosed water, and at the bottom of the mixing bowl there is a sector opening for unloading the mixture, closed by a shutter by means of a pneumatic cylinder, while the holders of mixing blades and cleaning scrapers are fixed on the rotor driven by an electric motor, and the inner cleaning scraper is rigidly fixed to the rotor, and the outer cleaning scraper the scraper and holders of the mixing blades are spring-loaded, while on the upper part of the rotor there are adjusting bolts for setting the gap between the blades and the bottom and the spring tension, and limit switches are fixed on the outer wall of the mixing bowl, signaling when the shutter is in the extreme positions and turn off the electric motor when the mixing bowl doors are opened. The technical result of the claimed utility model is to improve the quality of the resulting mixture. 3 ill., 1 tab.

Description

The utility model relates to the construction industry and can be used for the preparation of concrete and mortar.

Known development of the company JSC "Kulonenergomash", Kazan. This is a concrete mixer BP-1500, which is designed for the preparation of rigid (hardness Zh1 - Zh3) and mobile (mobility P1 - P4) concrete mixes in production lines of precast concrete plants, concrete mixing plants, concrete mixing plants.

The disadvantage of analogue is the low quality of manufactured concrete mixtures.

The closest analogue of the claimed utility model can be adopted a concrete mixer containing a mixing bowl, a drive, a bladed mixing body of a rotary type, a cleaning scraper connected to the mixing body by means of a beam, characterized in that, in order to reduce energy consumption and increase reliability, the mixing body is equipped with a lever element with stops at one of the ends, wherein the lever element is hinged at one end to the beam, and at the other - hinged to the scraper, while the axis of the hinged connection of the beam with the lever element is located between the stops, and the hinged connection of the scraper with the lever element is installed in front of the hinged connection of the lever element with a beam in the direction of rotation of the mixing body (RU 2005601 C1, B28C 5/16, 01/15/1994).

The disadvantage of this technical solution is the low quality of the manufactured concrete mix.

The technical problem to be solved by the claimed utility model is the elimination of the above disadvantages.

The technical result of the claimed utility model is to improve the quality of the resulting mixture.

The technical result of the claimed utility model is achieved by the fact that the concrete mixer contains a fixed cylindrical body in the form of a mixing bowl with a bladed mixing body of a rotary type, cleaning scrapers and a drive, a cover is installed on the mixing bowl, in which loading windows are made for separate loading of inert materials and cement , an inspection hatch and a branch pipe for pouring metered water, and at the bottom of the mixing bowl there is a sector opening for unloading the mixture, which is closed by a shutter by means of a pneumatic cylinder, while holders of mixing blades and cleaning scrapers are fixed on the rotor driven by an electric motor, and the inner cleaning scraper is rigidly fixed to rotor, and the outer scraper and holders of the mixing blades are spring-loaded, while on the upper part of the rotor there are adjusting bolts for setting the gap between the blades and the bottom and the spring tension, and on the outer wall of the mixing bowl Limit switches are attached to signal that the shutter is in the extreme positions and turn off the electric motor when the mixing bowl doors are opened.

The utility model is illustrated by drawings, where:

In FIG. 1 shows the EC-1500 concrete mixer.

In FIG. 2 shows a top view of the EC-1500 concrete mixer without a lid.

In FIG. 3 is a top view of the EC-1500 concrete mixer with cover.

The EC-1500 concrete mixer is designed for the production of mortars, concrete mixtures, as well as mixtures used in the construction industry, foundry, glass and chemical production, the main technical data and characteristics (properties) of which are given in Table 1.

In FIG. 1-3 shows the EC-1500 concrete mixer, which consists of a fixed cylindrical body of the mixing bowl 1, a rotor 2, a glass 3, an unloading gate 4, a cover 5, blades 6, a loading window 7, cleaning scrapers 8, inspection hatches 9, lower armor 10 , side wall armor 11, cup armor 12, planetary gear 13, electric motor 14, pneumatic cylinder 15.

The concrete mixer contains a fixed cylindrical body in the form of a mixing bowl (1) with a bladed mixing body of a rotary type, a glass (3), an opening gate for unloading (4) the finished mixture, a cover (5) of the mixer body, blades (6) of various shapes, a window (7) for loading mixed material, cleaning scrapers (8), inspection hatches for maintenance (9), wear-resistant steel armor to protect the body from abrasion (10,11,12), planetary gearbox (13) with an electric motor (14), and pneumatic cylinder (15) with a control unloading gate.

The annular mixing space of the bowl (1) is enclosed between the bottom, outer and inner cylindrical shells and inside is protected by replaceable armor (10, 11, 12).

At the bottom of the mixing bowl (1) there is a sector opening for unloading the mixture, which is closed by a shutter (4).

The shutter is opened and closed by a pneumatic cylinder (15). Limit switches (not shown) are mounted on the outer wall of the mixing bowl (1), signaling that the shutter is in the extreme positions, as well as limit switches (not shown) that turn off the electric motor when opening inspection hatches (9) of the cover (5) during operation of the mixer .

From above, on the body of the mixing bowl there is a cover (5), which contains:

- loading windows (7) for separate loading of inert materials and cement;

- viewing hatch;

- a pipe for pouring metered water.

Holders of mixing blades (6) and cleaning scrapers (8) are fixed on the rotor body (2). The inner cleaning scraper is rigidly fixed to the rotor (2), while the outer cleaning scrapers and paddle holders are spring-loaded. The blade holders are connected to the fists through the key and installed in the body on metal-graphite bushings. The spring suspension of the blades protects the rotor (2) and gearbox (13) from breakage when jammed with crushed stone, which also improves the quality of the resulting mixture.

Adjusting bolts are located on the upper part of the rotor (2), with the help of which the gap between the scrapers (8) and the bottom of the bowl is set, and the spring is tensioned, which improves the quality of the resulting mixture.

The transmission of rotation to the gearbox (13) of the concrete mixer is carried out from the electric motor (14) mounted on the input shaft and connected to the planetary gearbox, which includes two sequential planetary gears of the first and second stages. The gearbox uses "floating" rims and a gear clutch, which ensures a uniform load on the gears. The output shaft of the gearbox (13) is rigidly fixed to the bowl (1) of the concrete mixer, and the torque is transmitted through the rotating housing of the gearbox (13). To reduce the dynamic loads on the gears, the electric motor (14) is connected by a rubber shock absorber to the cover (5).

The gears and bearings of the planetary gear (13) are lubricated with oil. The oil is drained through the drain plug of the gearbox housing.

The concrete mixer works as follows. When the rotor (2) is rotating, the dosed components of the mixture are loaded through the loading windows (7) and a predetermined dose of water is supplied. The rotating rotor (2) with its blades (6) acts on the mixed materials, forming a homogeneous mixture.

The finished mixture is unloaded through the sector gate (4) for unloading the mixture, which is controlled by a pneumatic cylinder (15).

The EC-1500 concrete mixer makes it possible to obtain a high quality mixture regardless of the difference in the density of the components due to the uniform mixing of the components throughout the entire volume of the mixer.

Thus, the above essential features of the EC-1500 concrete mixer complement each other and are in a causal relationship with the claimed technical result, which consists in improving the quality of the resulting mixture.

In addition, the EC-1500 concrete mixer has transport dimensions, so no additional costs and special permits for transportation are required during transportation.

Table 1 The name of indicators Values
(nominal) Loading volume, l
The volume of the finished batch, l
concrete mixtures
mortars
Mixing time, s
concrete mixtures (no more)
mortars (no more)
Aggregate size, mm, no more
Rotor speed, rpm
Installed electric motor power, kW
Working pressure in the pneumatic cylinder, MPa (kgf/cm ² )
Overall dimensions, mm
(a) (no more than) length
(c) (no more than) width
(b) (no more than) height
Weight, kg, no more
Current frequency, Hz
Control circuit voltage, V
Voltage of power circuits, V 1500±150
1000±100
1200±120
thirty
65
70
24
37
6
2649
2389
1973
3400
fifty^+2.5%
_-2.5%
220^{+10%
-fifteen%}
380^{+10%
-fifteen%}

Claims (1)

A concrete mixer containing a fixed cylindrical body in the form of a mixing bowl with a bladed mixing body of a rotary type, cleaning scrapers and a drive, characterized in that a cover is installed on the mixing bowl, in which loading windows are made for separate loading of inert materials and cement, an inspection hatch and a branch pipe for pouring dosed water, and at the bottom of the mixing bowl there is a sector opening for unloading the mixture, closed by a shutter by means of a pneumatic cylinder, while the holders of mixing blades and cleaning scrapers are fixed on the rotor driven by an electric motor, and the inner cleaning scraper is rigidly fixed to the rotor, and the outer cleaning scraper the scraper and holders of the mixing blades are spring-loaded, while on the upper part of the rotor there are adjusting bolts for setting the gap between the blades and the bottom and the spring tension, and limit switches are fixed on the outer wall of the mixing bowl, signaling when the shutter is in the extreme positions and turn off the electric motor when the mixing bowl doors are opened.

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