FR2901503A1 - Device for preparing product such as concrete or mortar, comprises mixing tank has upper opening to discharge pulverulent material contained in malleable bag, and unit to avoid dust during discharging of material contained in bag - Google Patents

Abstract

The device for preparing a product such as concrete or mortar, comprises a mixing tank (9) has an upper opening to discharge a pulverulent material contained in a malleable bag, a unit to avoid dust during the discharging of the pulverulent material contained in the bag, and a shower distributed under a cover (3) in a tight way around the opening of the tank. The unit for avoiding the dust is constituted of cover, which is tightly assembled on the opening of the mixing tank. The cover is equipped with a truncated circular opening. The device for preparing a product such as concrete or mortar, comprises a mixing tank (9) has an upper opening to discharge a pulverulent material contained in a malleable bag, a unit to avoid dust during the discharging of the pulverulent material contained in the bag, and a shower distributed under a cover (3) in a tight way around the opening of the tank. The unit for avoiding the dust is constituted of cover, which is tightly assembled on the opening of the mixing tank. The cover is equipped with a truncated circular opening, whose perimeter corresponds to a dimension of perimeter of the bag. Between the cover and the opening of the mixing tank, sealing is carried out by two peripheral wall-shaped elements. One of the element is attached with an upper part of the tank and the other is attached with a lower part of the cover, which is placed on the tank. The cover has a circular grid and a chopper in a form of saw to cut the bag, where the chopper is diametrically placed. The truncated opening has an upper base with a diameter of 28-35 cm and a lower base with a diameter of 23-32 cm. The bag has a globally parallelepiped shape with height, width and length. The diameter of opening of the cover is equal to the length of the bag.

Description

disadvantages mentioned above, especially in terms of the flight of dust. A

  Another object of the present invention is to provide a device that is rustic, easy to use and with a lower cost. Other aims and advantages of the invention will become apparent from the description which follows, which is given for information only and which is not intended to limit it. The invention relates to a device for preparing a product, such as concrete or mortar, comprising a mixing tank, having an upper discharge opening, through which at least one pulverulent material contained in a bag is capable of to be discharged, and means to prevent the flight of dust during the discharge of said bag containing said powdery material. According to the present invention, said means for preventing the flight of dust are constituted by a lid, sealingly mounted on the upper opening of said mixing tank, and equipped with a circular opening whose perimeter corresponds to the perimeter dimensions said bag. The invention will be better understood on reading the following description accompanied by the appended drawings in which: FIG. 1 shows a perspective view showing the cover according to the present invention; FIG. 2 shows a schematic perspective view showing the upper opening of said mixing vessel according to the present invention; - Fig. 3 is a schematic perspective view showing the lid and upper opening of said mixing vessel secured to each other; A diagrammatic perspective view showing the discharge of the pulverulent material into the mixing tank; FIG. 5 shows a schematic partial perspective view showing the means for preventing the flight of dust. The present invention relates to a device for preparing a product, such as concrete or mortar. According to the present invention, said device comprises a mixing tank (not shown) having an upper opening 1 of discharge, through which at least one pulverulent material contained in a bag 2 can be poured. Said device further comprises means for preventing the flight of dust, during the discharge of said bag 2 containing said powdery material. According to the present invention, and as shown in FIGS. 3 and 4, said means for preventing the flight of dust consist of a lid 3 sealingly mounted on the upper opening 1 of said mixing tank (not shown) . In addition, said lid is equipped with a circular opening 8 whose perimeter corresponds to the perimeter dimensions of said bag 2.

  One of the advantages of the device, as described in the present application, is to prevent the flight of dust thus avoiding their contact with the operator of the mixing tank. According to a particular embodiment of the present invention, and as shown in FIG. 1, said lid 3 has an upper opening 8 of frustoconical profile of discharge of said powdery material, thus constituting a kind of funnel for receiving the parts of the bag. empty. According to another embodiment of the present invention, and as shown in FIG. 5, the seal between said lid 3 and said upper opening 1 of said mixing tank is effected by means of two elements 5 and 6 peripherals, shaped skirt, complementary and adaptable to each other. By way of non-limiting example, the two elements 5 and 6 have a shape, as shown in FIG. 5 consisting of an inclined section 51, 61, provided over the entire lower periphery of the cover 3 and over the entire upper periphery. of the mixing tank 9, vertically extended by a return 52, 62, the respective inner and outer surfaces coinciding to form a baffle and a seal by closed and sealed contact. However, any other form known to those skilled in the art and able to adapt to it is possible. One of the advantages of the use of these two elements 5 and 6, 5 in the form of a skirt, is to prevent the exit of dust at the time of discharge of said powdery material between the upper opening 1 of the tank and its cover 3. According to the present invention, and as shown in Figure 5, one of the skirted elements 5, 6 is subject at the upper part 9 of said mixing tank and the other element 5, 6 is secured to the lower part of the lid 3 mounted on the mixing tank. By way of non-limiting example, the two elements 5 and 6 are respectively subject to the lower part of the lid 3 and the upper part 9 of said welding kneading vat. Furthermore, according to the present invention, said lid 3, sealingly mounted on said upper discharge opening 1 of said pulverulent material, comprises at its circular opening 8, a circular grid 4 and a saw-shaped chopper 7. to tear said bag 2 containing said powdery material, as shown in FIGS. 1, 3 and 4. Alternatively, said circular grid 4 and the slicer 7 may be secured on the upper opening 1 of said mixing tank. Said saw 7 for tearing said bag 2 containing said powdery material is placed diametrically on the circular opening 8 of said lid 3 sealingly mounted on the upper opening 1 of the mixing tank. In addition, and according to the present invention, said device, as described in the present invention, further has a shower water supply (not shown) distributed under said cover 3 sealingly mounted around the circular opening 8 of the cover said mixing tank.

  The shower water supply allows, in addition, to wet the dust generated by the discharge of said bag 2 inside said mixing tank and thus prevent their exit. By way of nonlimiting example, said frustoconical opening 8 5 has an upper base with a diameter of between 28 and 35 cm and a lower base with a diameter between 23 and 32. In particular, said frustoconical opening 8 has an upper base with a diameter of 32 cm. and a lower base of diameter 30 cm. According to the present invention, the bag 2, in particular paper, 10 containing: said powdery material has a generally parallelepiped shape of height h, width 1 and length L as shown in Figure 3. This being said, said perimeter of the opening 8 of said cover 3 substantially corresponds to twice the base of the bag, that is to say more precisely to the sum of 2 (L + 21).

Furthermore, according to the present invention, the diameter of the opening 8 of said cover 3 is substantially equal to the length L of said bag 2 containing said powdery material. This allows to introduce the bag into the opening 8 so as to prevent the flight of dust to the outside. As shown in FIG. 4, once the bag 2 is torn substantially into two equal parts, each of said portions 21 and 22 are introduced into the opening 8, one on each side of the cutter 7. Each of said portions 21 and 22 of the bag fits the circular opening and fills half of the opening 8 by blocking the exit of the dust.

Of course, other embodiments, within the reach of those skilled in the art, can be envisaged without departing from the scope of the invention.

Claims (10)

  A device for preparing a product, such as concrete or mortar, comprising a mixing tank, having an upper discharge opening (1), through which at least one pulverulent material contained in a bag (2) ) is capable of being discharged, and means for preventing the flight of dust, during the discharge of said bag (2) containing said pulverulent material, characterized in that said means for preventing the flight of dust consist of a cover (3), sealingly mounted on the upper opening (1) of said mixing tank, and equipped with a circular opening (8) whose perimeter corresponds to the perimeter dimensions of said bag (2).   2. Device according to claim 1, characterized in that said lid (3) has a circular opening (8) frustoconical profile discharge of said powder material.   3. Device according to claim 1, characterized in that the seal between said cover (3) and said upper opening (1) of said mixing vessel is effected by means of two peripheral elements (5, 6). , skirt-shaped, complementary and adaptable to one another.   4. Device according to claim 3, characterized in that one of the elements (5, 6) in the form of a skirt is secured to the upper part (1) of said mixing tank, and the other element is subject to the lower part of the lid (3) mounted on the mixing tank.   5. Device according to claim 2, characterized in that said cover (3) sealingly mounted on said upper opening (1) of discharge of said powder material comprises a circular grid (4) and a trencher (7) in the form of saw for tearing said bag (2) containing said powdery material.   6. Device according to claim 5, characterized in that the saw-shaped chopper (7) is placed diametrically.   7. Device according to claim 1, characterized in thatprovided furthermore a shower water supply distributed under said cover (3) sealingly mounted around the upper opening (1) of said mixing tank.   8. Device according to claim 2, characterized in that said frustoconical opening (8) has an upper base diameter of the order of 28 to 35 cm and a lower base diameter of about 23 to 32 cm.   9. Device according to claim 1, characterized in that the bag (2) containing said pulverulent material is deformable and has a generally parallelepiped shape of height h, width I, and length L, and said perimeter of the opening of said cover corresponds substantially to the sum 2 (L + 21).   10. Device according to claim 1, characterized in that the diameter of the opening (8) of said cover is substantially equal to the length of said bag (2) containing said powdery material.