RU2336163C1 - Mixing machine - Google Patents

Abstract

FIELD: construction.

SUBSTANCE: mixing machine includes body frame with supports, support frame for drum with inner blades, drum rotary drive, motor, reducing gear with output pinion shaft engaged with ring mounted perpendicular to drum shaft and mechanism for drum axis deviation. Additionally, mixing drum contains high-speed drive and consists of three parts: medium cylinder part with pivot-hinged blades with retainers-stops and vibration limiters for high-speed drive, top and bottom parts in the from of truncated cones. Bottom part contains stuffing box. Drum support frame is made of two parts: top cylinder part with bearing-tappet rollers and stops lockers of support frame axis deviation, and bottom part in the form of truncated cone.

EFFECT: equipment functionality enhancement and service life increase; quality improvement and cost reduction for manufactured products.

8 dwg

Description

The invention relates to equipment for the industry for the production of building materials, in particular to equipment for the production of heavy concrete, mortars, as well as foam concrete.

Known concrete mixer of gravitational action (RF Patent No. 2059461, IPC В28С 5/18), containing a U-shaped frame with the main wheel and mounted on the main additional supports, and the main supports are mounted on the frame with the ability to adjust position along the U-shaped frame and rotate in planes perpendicular to the ends of the U-shaped frame mounted on the frame of the engine and gearbox with an output shaft, on which through a quick-detachable connection mounted removable drum. The concrete mixer can be equipped with an additional gearbox for transmitting force from the handle to the drum. The disadvantages of this concrete mixer are limited functionality due to the low working speed, which is reduced only to the gravitational method of mixing the constituent components, which is facilitated by the laminar flow, i.e. calm with low mobility, randomness, disorder of mixing particles of components. And as a result, the low quality of mixing, which leads to a decrease in the quality of concrete.

Known equipment for the production of concrete and mortar OJSC "Stroymash" Lebedyansk, Lipetsk region., Taken as a prototype. The concrete mixer includes a housing frame with supports, a drum supporting frame with internal blades, a drum rotation drive, an engine, a gearbox with an output shaft with a gear, meshed with a crown fixed perpendicular to the axis of the drum, and a mechanism for deflecting the axis of the drum.

The disadvantage of this equipment is the gravitational method of mixing the components, which leads to a decrease in the characteristics of concrete due to the limited functionality of the equipment, as well as the low reliability of the equipment during the rollover of the drum due to the occurrence of additional bending moments affecting the supporting elements: bearing, crown with gear.

The invention is aimed at expanding the functionality of the equipment through the production of concrete, mortars, as well as foam concrete and other types of high-strength concrete, improving the quality and reducing the cost of production, increasing the life of the equipment.

The problem is solved as follows. The mixer includes a housing frame with supports, a drum supporting frame with internal blades, a drum rotation drive, an engine, a gearbox with an output shaft with gear, meshed with a crown fixed perpendicular to the axis of the drum, and a mechanism for deflecting the axis of the drum, the mixer drum further comprising a high-speed the drive is made of three parts: a middle cylindrical one with blades pivotally mounted on it with stops-chippers and oscillation limiters of the shaft of the high-speed drive, upper and lower parts truncated cones, the lower part comprising a stuffing box; the supporting frame of the drum is made of two parts: the upper cylindrical part with the supporting thrust rollers and the stop-clamps of the deviation of the axis of the supporting frame and the lower part in the form of a truncated cone.

Figure 1 - General view of the mixer;

Figure 2 is a top view of the mixer;

Figure 3 is a side view of the mixer;

Figure 4 is a sectional packing device;

Figure 5 is a cross section of the lower part of the mixer drum;

Figure 6 - position of the blades in the production of solutions; drive operation.

In Fig.7 - the position of the blades in the production of heavy concrete; drive operation.

On Fig - the position of the blades in the production of foam; drive operation. The mixer comprises a housing frame 1 with supports 2, a supporting frame 3, with a drum 4 mounted on it with internal blades 5, a rotary drive 6 of the drum 4, an engine 7, a gearbox 8 with an output shaft 9 with a pinion gear 10 engaged with the crown 11 fixed in a plane perpendicular to the axis of the drum 4, the deflection mechanism 12 of the axis of the drum 4. The mixer 4 drum further comprises a high-speed drive 13 and is made of three parts: the middle 14, on which the blades 5 are mounted with hinges 15 with stops-chippers 16 and established at an angle, the limiters 17 of the oscillations of the shaft 18 of the high-speed drive 13, the upper 19 and the lower 20 parts are in the form of truncated cones, the lower 20 of the drum containing the stuffing box 21; the supporting frame 3 of the drum 4 is made of two parts: the upper 22 of the cylindrical part with the support-stop rollers 23 mounted on it in the upper and lower parts and the lower stops by the stoppers 24 deflecting the axis of the supporting frame 3 of the drum 4 and the lower 25 part in the form of a truncated cone. A rotor 26 and vanes 27 are mounted on the shaft 18 of the high-speed drive 13 in the inner part of the drum, and a pulley 28 is installed on the outer end of the shaft 18, which receives torque through a V-belt transmission 29 from the engine 30 of the high-speed drive 13. The engine 30 of the high-speed drive 13 is mounted on the lower 25 parts of the support frame 3.

The mixer operates as follows.

1. The manufacture of solutions. The drum 4 is fixed in an upright position by the stoppers 24. The drive 6 rotates the drum 4 and the speed drive 13. The drum 4 is loaded with the original components and mixed using the reversers of the drives 6 and 13 in various operating modes. The quality of the solution is controlled by the previously obtained control parameters.

2. Production of heavy concrete. The solution described above is obtained, then the high-speed drive 13 is turned off, the crushed stone is loaded into the drum 4, having previously deflected it with the deflection mechanism 12 by the angle generally accepted in the production of heavy concrete, and fixing it with stop-clamps 24, continue to mix using only the drive 6. Quality the solution is controlled according to previously obtained control parameters.

3. Production of foam concrete. The drum 4 is fixed in an upright position by the stoppers 24. The high-speed drive 13 is launched, which rotates the rotor 26 counterclockwise when viewed from above the drum 4. The components necessary for the production of foam concrete are loaded. The rotor 26, pumping the liquid suspension, presses the blades 16 against the inner cylindrical surface of the drum 4. The stop bumpers 17 are installed at an angle that reflects the pressure of the suspension upward. Spatulas 27, rotating, create a cavitation cavity behind them, where the pressure is below atmospheric, which creates a condition for the suction of air bubbles from the funnel formed along the axis of rotation of the shaft 18, which ultimately leads to porosity of the suspension - the production of foam concrete. The quality of the production of foam concrete is controlled according to previously obtained parameters.

Upon completion of the mixer, it is installed in any position and loaded onto 25-30% of the drum volume with water and drives 6 and 13 are turned on, using reverse in different modes and the deflection mechanism 12 by 15-20 °, and the drum is thoroughly washed.

Claims (1)

The mixer, comprising a housing frame with supports, a supporting frame, a drum with internal blades, a drum rotation drive, an engine, a gearbox with an output shaft with a gear, meshed with a crown fixed perpendicular to the axis of the drum, a mechanism for deflecting the axis of the drum, characterized in that the mixer drum additionally contains a high-speed drive and is made of three parts: a middle cylindrical one with blades pivotally mounted on it with stops, chippers and oscillation limiters of the shaft of the high-speed drive, top her and the lower parts in the form of truncated cones, and the lower part contains the stuffing box; the supporting frame of the drum is made of two parts: the upper cylindrical part with the supporting thrust rollers and the stop-clamps of the deviation of the axis of the supporting frame and the lower part in the form of a truncated cone.

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