DE3206772A1 - DEVICE FOR MIXING AND MIXING, ESPECIALLY OF CEMENT, MORTAR AND ADDITIVES FOR CONSTRUCTION SITES - Google Patents

Description

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Device for mixing and mixing especially cement, mortar and aggregates for construction sites

The present invention relates to a device for mixing and mixing especially cement, mortar and aggregates for construction sites.

As is well known, efforts are being made to supply the construction sites by means of motor vehicles that fcum. Transport of prepared Concrete from the appropriate concrete mixers are suitable and the completion, dosing and mixing of the concrete should perform.

The use of machines for the production of small or medium-sized quantities on the construction site - so-called "Construction site concrete mixer" or "bucket concrete mixer". There are two types:

- Reversible cup mixer with or without self-discharge,

- Cup mixer · with only one direction of rotation. Basic feature of the reversible concrete mixer is "that one There is no need to tilt the container with the mix: to unload the finished concrete; when rotating in one direction around the horizontal. On the axis of the tank, mixing takes place thanks to the scoops attached to the inner walls, turning in the opposite direction causes the discharge.

This machine can also be equipped with water dosing devices and mechanical filling with the material to be mixed. .

The second, more common concrete mixer is characterized above all by a simpler construction, accordingly a smaller Kor.tenau.fwand. '. U · ,.

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For example, this concrete mixer (more on this later) essentially consists of a substructure on which the arm rests based, which in turn carries the container. The arm can rotate around a geometric horizontal axis in relation to the substructure, the container around its geometrical axis and perpendicular to the axis around which the arm rotates.

A motor, which is also based on the substructure, drives the container (through suitable transmission elements) to rotate around its axis. · Ι

A handwheel is provided to effect the rotation of the arm. The mixture of the different ingredients in the Inside the container takes place during the rotation, by means of the blades fixed to the container walls. As explained in more detail below, this concrete mixer has several disadvantages.

A significant disadvantage is, for example, that the container run at a fairly low angular velocity nut; the speed of rotation of the container would be higher, i.e. would it exceed a certain limit, then were the components of higher density are thrown against the inner wall of the container as a result of the centrifugal force, i.e. separated. The mixture of very dry concrete, as it is usually used for floor substrates, deserves further consideration will.

This type of concrete is usually mixed by hand because of the low speed of the tank and dos in this case required low water content can be achieved with

no mixing of the components with the construction site mixer.

In order to exclude the aforementioned kisstands and further, ■ To achieve important advantages, as will become apparent from the following description, a device for mixing and Mixing built according to the present invention, which in the is essentially characterized in that there is a container for receiving the various Comprises substances, an assembly arranged in the interior of the container consisting of one or more correspondingly shaped Elements for acting on the material, as well as devices for generating relative rotational movements between unit and tank; the unit is designed in such a way that · it during the relative rotational movement ■ Movement of the material between the unit and the container caused with vertical and horizontal components.

In order to better zx \ illustrate the characteristics and advantages of the apparatus of this invention, a conventional concrete mixer, and an example will now be described of the device for mixing and stirring in the embodiment of the present invention with reference to beigeschlosscnGr sketches; show in it:

Fig. 1 - an elevation of a conventional concrete mixer; Fig. -2 - elevation of a device according to the present invention, with partial cut; · ·

Fig. 3 - Elevation of an essential part of the device. of this invention (FIG. 2), with a container (shown in section according to a running through the geometric axis Level), as well as one arranged inside the container

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Rotary unit;

pig, 4 _ plan view of the part of FIG. 3; Fig. 5 - Outline of a variant with respect to the part of Fig.

The concrete mixer of known construction Fig. 1 has a substructure 1 for receiving the following parts:

An arm 2 supported by substructure 1 is designed so that it can rotate around a horizontal geometric axis A relative to the substructure.

3 denotes a container or "cup" carried by arm 2 in such a way that it is around its geometric shape in relation to the arm Axis B can rotate.

Arm 2 is driven by handwheel 4 on the part of the operator; the handwheel can be fixed to the arm 2 or the movement can be transmitted by suitable gowns.

A motor is used to rotate the cup 3 (about axis b) 5 is provided, which drives a pulley 7 via belt 6; this is fixed by a shaft to a pinion which engages in a ring gear 8 fixed to cup 3. ■ Motor 5 is firmly on substructure 1.

9 denotes a belt-motor safety room. The loading through the filling opening 10 is mostly done by hand. Both for loading and for mixing the ingredients, the cup 3 must first be inclined by about 45 ° with respect to its axis A. will.

The substances are mixed by a number of blades which form a unit with the cup 3 and which knead the mixture as it rotates. The finished product is unloaded by means of the handwheel 4 by tilting the cup.
The concrete mixer described of the known construction (Fig. 1)

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has the disadvantages mentioned, e.g. must Run cup 3 at a fairly low speed (to avoid the indicated centrifugal effect), in addition, the concrete mixer itself is (as previously mentioned) practically unsuitable for very dry mixtures.

B is now based on FIGS. 2, 3 »4, 5 an example the implementation of the device according to the present invention will be discussed.

In the case of the one in Fig. 2, 3, 4 (only as an example) Apparatus according to this invention is provided with a substructure or frame 11 which contains the parts to be explained here ■ records.

The device comprises a container 12 in the (particularly expedient jug bucket shape attached to frame 11 (fixed to it).

The container 12 has a discharge nozzle 13 with a sealing closure on the lower part. Inside the container is coaxial with this a rotary unit - designated as a whole with 14 - attached, which (in the example according to 2, 3, 4) from a central body 15 designed as a cone or truncated cone with a seated thereon Element in the form of a conical screw 16 consists. Unit 14- (from body 15 and the element 16 fixed to it) forms a unit with a vJelle 17, that of frame 11 is held in such a way that it ur.i its geometric axis Z (geometric axis of the body 15) can rotate. Kit in other words, the unit can be opposite the container 12 rotate and the rotation takes place around the geometrical one

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vertical axis Z (which is also the geometric axis of the container 12).

Unit 14 is fastened to frame 11 by a device Motor 22 via a pulley 18 (fixed to the motor shaft), belt 19 and pulley 20, which are fixed to V / elle 17, i.e. to Unit 14 is seated, driven.

Wheels 21 are used to move the device on the site intended.

The open-topped container 12 is loaded P. In order to produce by introducing according to substances to be mixed from the top, arrow the mixing process, unit 14 '(Vermengungsaggregat) by the above-mentioned organs motor 22, pulleys 18 and 20, belt 19' brought to rotation . The device for mixing and blending according to FIGS Container 12 filled substances in motion.

The resulting movement of the material is shown in simplified form in FIGS. 3 and 4 by arrows. The element 16, which as a cone or truncated cone and with appropriate inclination against the vertical axis Z causes the transport, i.e. movement of the material to be mixed from bottom to top (see arrows in Fig. 3 ') »as a result of the It then returns by gravity to the lower part of the container 12 to resume the cycle, and so on. As a result, the substances are mixed together, the separation is thanks to the inclination of the screw 16 against the

Axis of rotation Z prevented. ■

Mixing is also promoted by the fact that the material (see arrows in Fig. 4) except for the upward thrust also a slow orbital movement (around the geometric Axis z) is subject to ..

By making the mass the described two kinds of movements .subjected "(upward and circular movement), becomes the homogenization of the product is promoted and a more favorable production / time ratio is achieved. This is how you get a good result, to which the fact also contributes; that the speed of rotation of the unit 14 can be quite high and definitely higher than with a conventional concrete mixer.

After completing the operation, the operator takes care of the The container 12 is emptied by opening the outlet nozzle 13.

The derivation of the product is determined by the helical shape of the Elements 16 facilitates the discharge process practically acts as a shovel that feeds the material to outlet 13. . . '"·" ■ "

If you want to discharge in a shorter time, you can turn the direction of rotation of the unit 14. · The example in FIG. 5 with the unit 14A for mixing the substances in the container 12 is among the possible variants particularly noteworthy. This unit 1ΊΛ also has eiri Element with conical screw 16Λ, which with body 15A a Forms unity; unlike the body 15 mentioned, this body 15A is of cylindrical construction.

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The elements in the form of the conical screw can be continuous, like 15 and 15A, but also interrupted; instead of a continuous element you can e.g. Provide a number of blades with a suitable shape that cause the mix to move as desired. The outlet 13 can be equipped with a further closure, a cut-off valve, to prevent the unloading of the ' To facilitate checkout by subdividing them. Other means can be used, such as a Reduction gears for the drive; hand-operated or mechanical devices for filling the container 12; Devices (especially taps) for introducing and metering the water, as well as water tanks, etc. The rotating element for mixing the substances can be designed as a spiral or screw, running through the screw or be interrupted.

The device described here according to the present invention allows the achievement of very favorable results and the Exclusion of the above-mentioned ice stalls, which are to be lamented with conventional concrete mixers.

Since the container 12 forms a unit with the substructure 11, can In addition, the arm that carries the cup of the usual concrete mixer can be dispensed with, which means that the corresponding Operations for the rotation (loading and unloading) are omitted.

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Claims (10)

Dr. F. Zumstein Sr. - Dr. E. Assmann - DY.W.Koenigsberger Dipl.-Ing. F. Klingseisen - Dr. F. Zumstein jun. PATENT LAWYERS APPROVED REPRESENTATIVES AT THE EUROPEAN PATENT OFFICE REPRESENTATIVES BEFORE THE EUROPEAN PATENT OFFICE claims 1. Device for mixing and mixing, especially cement, Mortar and other materials, characterized in that it comprises a container for containing the various includes components to be mixed, a built in the container unit with one or more elements of suitable design to act on the material to be mixed, as well as suitable means for generating a .relativen Umlaufbev / between the unit and the container, because the unit is designed in such a way that it causes movements of the material with vertical components and horizontal components during the relative movement between the unit and the container. 2. Device for mixing and stirring according to claim 1 with the Feature that said aggregate consists of a central body and an element, essentially in shape a tapered screw, such that it causes the register to both move upwards and close it .i fall off (and so on), as well as a slow revolving movement around the geometric axis of the conical Screw. 3. Device for mixing and stirring according to claim 1 with the Feature that said aggregate consists of a central body and a non-continuous element, i: n essential in the form of a number of blades or ribs, arranged one after the other to form a conical screw and designed in such a way that that they should move up with the crowd subsequent falling away (and so on), be it to a slow revolving movement around the geometric axis the tapered screw. 4. Device for mixing and stirring according to claim 2 or 3 with the feature that said container (12) with the Frame (11) of the device forms a unit, while said Unit is held in the interior of the container so that it is opposite the frame, thus the container (12) to its own geometric axis can rotate. 5. Device for mixing and stirring according to claim 4 with the feature that said container (12) in the lower part ■ Has a side outlet nozzle for emptying the container. 6. Device for mixing and stirring according to claim 5 with the Feature that the element in the form of a conical screw ■ - which can be continuous or non-continuous - in is able to derive the finished product through. to effect the side exit. 7. Device for mixing and stirring according to claim 4 with the feature that there is a motor carried by the device frame includes, as well as suitable connections between the engine and the named unit to transfer the drive from the engine to the unit. 8. Apparatus according to claim 2 or 3 with the feature that the central body (15) is designed as a cone. 9. Device according to claim 2 or 3 with the feature that the central body (i5A) has a cylindrical shape. 10. Device according to claim 2 or 3 with the feature, - that the element acting on the mass is designed as a spiral or screw.