NEW ARRANGEMENT OF AGITATORS APPLICABLE TO THE MOVEMENT OF HIGH SPECIFIC WEIGHT PRECIPITATION PRODUCTS

Description

BACKGROUND OF THE INVENTION

[0001] The present specification relates to a tank containing a new arrangement of agitators, applicable to the movement of high specific weight precipitation products, the evident purpose of which is to obtain, starting from same, that in the products incorporated into a closed - tank, and, of course, into which water has been incorporated which contains suspended precipitation products having a high specific weight, the final precipitation of the product on the tank inner parts distant from the agitators will be avoided, so that, consequently, the - product will be processed in an adequate way.

FIELD OF THE INVENTION

[0002] This invention will find application in the industry dedicated to the manufacture of machines, apparatus and devices intended for the recovery of cement and concrete.

RELATED ART

[0003] It is known that, previous to the concrete hardening, the material remaining from a transport, such as the material remaining in a concrete mixer, is incorporated into a tank, which, fitted with appropiate protecting means, gets to recover the different - products configuring it, such as, for example, fines, cement, water, and so on.

[0004] For the recovery of cement powder, large tanks are used, which, fitted with agitators of greater or lesser power, move the cement in suspension in the water, obtaining, on the one hand, a more or less purified - water, while on the other hand, the cement powder.

[0005] Nevertheless, it is a fact that even using agitators having a great power, the flow from the agitator on the liquid mass which contains suspended cement, configured as a product having a high specific weight of precipitation, implies that the material incorporated into the water, the cement in this particular case, precipitates into the more distant zone of the agitator itself, generating a pluraility of drawbacks in the recovery of cement powder.

[0006] The applicant is aware of the existence, at present, of a Patent of Invention applied for as US-A-4.226.542, which describes and claims a system and method for transporting and moving cement, by using a set of propellers moving and transporting, at the same time, the cement.

[0007] This invention contains, unlike the Patent of Invention considered as suitable, a vertical tank, while the tank embodied in the invention deemed as necessary, is horizontal, owing to the fact that inside it there are agitators located which need a minimum of adequate space in order to provoke the performance and output as expected from the agitators.

[0008] It has been also proved that said Patent uses a wall or partition practically subdividing the tank into two portions, although keeping a communication at the lower part, since the wall or partition does not come into - contact with the bottom of the tank, but due to this - characteristic, if incorpored in the invention considered as suitable, the wall or partition would prevent the action provoked by the agitators facing each other.

[0009] Said agitators are faced each other, and, nevertheless, the agitators considered as existing in the recovered Patent of Invention are located in parallel, due to the fact that they perform different purposes.

[0010] The agitators described in the recovered Patent of Invention are configured as propellers each of them, the only and possible function of which is to generate a movement within the liquid which contains the cement by means of more or less slow circular flows to facilitate its move, while in the invention considered as suitable, the propellers cause turbulence effects due to the high rotation speed and the specific design of the used propellers.

[0011] The inventor is aware of the fact that the slurry returns to the left hand of the tank referenced with (27) in the recovered Patent of Invention, this tank - being divided by a wall or partition (69), as above - mentioned, and when the agitators do not operate,the most time, due to a larger amount of slurry at the intake, a hydrostatic pressure is created forcing the water to pass over the lower part of the wall or partition edge, to the upper part of the right side of the tank.

[0012] As a result, the liquid presents, at the right portion of the tank, a more markedly diluted formation, and - over the tank bottom, the main portion compressing the clarified water.

[0013] Initially, when the tank is empty, it operates like a split pool.

[0014] When the slurry drains into the tank (27), the fine sands and the fine cement settle on the bottom, and the more diluted portions of the slurry pass underneath th wall or partition on the right-hand side.

[0015] When the amount of drained slurry grows, the drained fine sands form a filter-mat (70), and the most diluted portions pass through a thicker filter underneath the wall or partition (69), and they accumulate on the right-hand side of the partition.

[0016] When the liquid accumulated on the right-hand side is of inferior density to that situated on the left-hand - side, the liquid surface raises to level (71), under level (72).

[0017] When the clarified water is placed on the upper part of the right-hand column of the liquid, level (71) passes to level (71')

[0018] It should be pointet out that, in the recovered Patent of Invention, a couple of agitators, which are - of identical configuration, are mounted adjacent on the tank bottom of slurry.

[0019] In page 12 of that invention, it is also stated that the end extremity of each agitator referenced (65) and (65") is usually secured against longitudinal displacements by means of vertical shackles.

[0020] Also, page 12 states that, apparently, each agitator (65) and (65') propels the portions of the slurry in movement in the tank (27) in order to keep the cement in suspension and to protect the slurry to be used by the mixing plant (12).

[0021] Likewise, it is stated that the duration of each agitator (65) and (65') operation is very limited, and each agitation period is repeated at infrequent intervals lacking cadence not at all.

[0022] In page 13 of the known Patent of Invention, it is - stated that the amount of power required to keep the - slurry in a usable condition is inferior to other systems, and the configuration of transverse cut of each agitator has been designed to essentially reduce the - slurry placed on the agitator surface, so reducing the energy consumption when each agitator operates.

[0023] Lastly, in page 14, it is read that if a power failure or error occurs for a relatively long period, the slurry deposited on the bottom of the tank (27) may acquire a viscosity sufficiently great to prevent the agitators (65) and (65') to rotate, i.e to impede them to move, that which involves the absolute necessity to lift one of the agitators (65) or (65'), allowing only one motor of less power to be used, without sacrificing the performance.

[0024] An evident solution to the present problems in this matter, would be to rely on a tank containing cement - fines and water. This solution, according to the characteristics of the agitators used, would obviate the precipitation problems above mentioned.

[0025] However, the applicant is not aware of the existence of an invention fitted with the characteristics considered as suitable.

SUMMARY OF THE INVENTION

[0026] The tank containing a new arrangement of agitators, applicable to the movement of high specific weight precipitation products as proposed by the invention, is configured per se as a solution having a great value as regards its application, since it obviates, in a clear and specific way, the drawbacks existing at present in this matter.

[0027] In a most concrete way, the tank containing a new arrangement of agitators, applicable to the movement of high specific weight precipitation products, which is the object of the present invention, is constituted - starting from the incorporation into a tank having an appropiate volume, of two conventional immersible agitators, which, once placed in a closed tank, and duly positioned and facing each other at each of the extremity of the tank, can avoid the final precipitation of the products on the tank zone distant from the agitators, so allowing for the agitation sought for the desired purpose.

DESCRIPTION OF THE DRAWINGS

[0028] In order to complement this description and aid to a better understanding of the characteristics of the invention, a sheet of drawing, forming an integral part of same, is attached herewith, showing, by way of illustrative and non-limiting nature, the following:

[0029] Figure 1 shows a sectional side elevational view of a tank comprising the incorporation of two conventional immersible agitators, which configure the invention related to a tank containing a new arrangement of agitators applicable to the movement of high specific weight precipitation products.

PREFERRED EMBODIMENT OF THE INVENTION

[0030] In the light of the only figure 1, it can be seen that the tank containing a new arrangement of agitators applicable to the movement of high specific weight precipitation products of the invention, is constituted - starting from the incorporation into a tank (1) of two conventional immersible agitators (2) and (2'), facing each other at the extremities of the inner area of the tank, in order to generate two facing flows (3) and - (3') in a liquid mass (4) which contains an indeterminated amount of a high specific weight precipitation product, such as cement.

[0031] The performance of the two conventional immersible agitators (2) and (2'), configured in their flows (3) and (3'), determines that the high specific weight - precipitation product incorporated into the water (4), does not deposit on the extremities of the tank, the latter being kept in a continuous movement together - with the water.

Claims

1. Tank containing a new arrangement of agitators applicable to the movement of high specific weight precipitation products, comprising the incorporation into the tank (1) of two conventional submersible agitators (2,2') positioned at each internal end of the tank and facing each other at the extremities of the tank (1), in order to generate two facing flows (3,3') in the longitudinal direction of the tank in a liquid mass (4), which contains high specific weigh precipitation products.

Ansprüche

1. Tank, der eine neue Anordnung von Rührern enthält, die für das Bewegen von Niederschlagsprodukten mit einem hohen spezifischen Gewicht verwendet werden, der den Einbau von zwei herkömmlichen Tauchrührern (2, 2') in dem Tank (1) umfasst, wobei diese jeweils an einem inneren Ende des Tanks angeordnet sind und jeweils an den Enden des Tanks (1) einander gegenüberliegend angeordnet sind, um so in der Längsrichtung des Tanks, in einer flüssigen Masse (4), die Niederschlagsprodukte mit einem hohen spezifischen Gewicht enthält, zwei einander entgegengerichtete Strömungen (3, 3') zu bewirken.

Revendications

1. Réservoir contenant un nouveau système d'agitateurs prévu pour des produits à fort poids spécifique en précipitation comprenant l'incorporation au sein d'un réservoir (1) de deux agitateurs immergés classiques (2, 2'), mis en place à chaque extrémité intérieure du réservoir et mis en regard l'un de l'autre aux extrémités du réservoir (1), afin de générer deux flux en regard (3, 3') dans le sens longitudinal du réservoir dans une masse liquide (4), contenant des produits à fort poids spécifique en précipitation.

Drawing