JPH0628716B2 - Liquid supply device for horizontal axis mixer - Google Patents

Description

The present invention relates to a liquid supply device used for supplying a liquid (water, admixture ...) To the inside of a mixing tank in a horizontal shaft type mixer having a horizontal mixing shaft. It is a thing.

In such a horizontal axis type mixer, it should be noted that the mixed material is evenly dispersed and supplied into the mixing tank.
Particularly important in the liquid supply device, in addition to supplying the liquid evenly scattered on the upper surface of the mixed material, in addition to deposits adhering to mechanical parts such as the mixing blade and the mixing shaft in the mixing tank. Effectively cleaning and removing with the falling energy of the liquid.

Considering the above-mentioned cleaning and removal of adhered substances, the amount of liquid to be added during the kneading of the mixture is a limited small amount of supply, so this is used for cleaning and removal of adhered substances. While there are many technical difficulties in effective use, the amount of liquid used only for removing the deposits is not limited, and it is possible to supply a large amount and unlimitedly. There are no technical difficulties.

In a conventional device (for example, in Japanese Utility Model Publication No. Sho 49-61768)
(Described in Japanese Patent Publication) is the latter, which is an apparatus used only for deposit removal work performed in the evening after the completion of the shipping work on one day. Therefore, since the deposit removal work is not performed at all while the mixture is being kneaded, deposits are likely to adhere to the mechanical parts where the mixture comes into contact, and once attached, the deposits will be mixed again. Each time it grows more and more, the grown deposit hinders the movement of the mixture in the mixing tank, resulting in a significant decrease in the kneading performance.

The present invention is to solve the above-mentioned drawbacks in such a conventional device, and is characterized in that a mixing shaft provided with a mixing member around a horizontal rotation shaft and both ends of the mixing shaft are supported. A mixing tank having a side wall, a cover for closing an upper opening of the mixing tank, and a liquid supply pipe for supplying liquid disposed inside the cover, the liquid supply pipe being an axial center of the mixing shaft. And a vertical supply means which is arranged in a vertically upper part along the whole area of the area where the mixing member is attached and which is made up of a large number of holes drilled downward in the vertical direction, and is inclined with respect to the vertical downward direction. A liquid supply device of a horizontal axis type mixer, which is formed of an inclined supply means composed of a large number of holes drilled in the direction.

A concrete embodiment of the device of the present invention will be described in detail below with reference to FIGS. 1 to 5 as to an example of a water supply device used for concrete production.

FIG. 1 shows a water supply device provided in a horizontal biaxial mixer.
The mixing axis of the present invention is not limited to such biaxial. Reference numeral 11 in the drawing denotes a mixing shaft, and around the shaft, a mixing member (mixing blade 41, auxiliary mixing blade 42, mixing arm 43,
An auxiliary mixing arm 44 ...) is attached. A mixing tank 12 supports both ends of the kneading shaft 11 by bearings attached to both side walls thereof. Reference numeral 13 is a driving means for rotating the mixing shaft 11, and 14 shown in FIG. 3 is a discharge gate, which is provided with its rotation center 33 eccentric with respect to the arc center of the discharge port of the mixing tank 12 for opening and closing. Cylinder 31, 31 '
The structure is such that the expansion and contraction operation of (1) is transmitted to the connecting rod 32 to be opened and closed.

Then, as also shown in FIG. 2, a water supply pipe for supplying water into the mixing tank 12 is arranged at a vertically upper portion along the axis of the mixing shaft 11 and in the entire region where the mixing member is attached. ing. A concrete example of the water supply pipe is a hollow pipe 1.
A plurality of hollow nozzles 16 for guiding a fixed length of water are provided in 5 vertically downward or in a direction inclined with respect to the vertical downward direction, and a rotary joint 17 is interposed to mechanically or manually. It is configured to rotate freely and is attached to the cover 16 above the mixing tank 12 so as to be supported. 18A and 18B are flow rate regulators, and the respective flow rate regulators have the following functions.

That is, water from a water meter (not shown in FIG. 2) flows in from above in the direction of the arrow, and is branched and distributed in two directions of the hollow pipe 15 and 15 'at the branching portion. At this time, if the distribution becomes unequal, the first flow rate regulators 18 and 18B 'are adjusted so as to be substantially equal. The water adjusted to an equal amount is discharged into the mixing tank 12 through each of the plurality of hollow nozzles 16.
The amount of water released by is not equal. Therefore, another required number of the second flow rate adjusters 18A are provided in the middle of the hollow pipe 15 so as to have substantially the same amount. However, the supplied water is discharged from each hollow nozzle 16 in equal amounts and is mixed into the mixture on average. A cutout weir may be used as the simplest flow rate adjuster, but a valve structure which will be described later and is easy to adjust may be used.

The feature of this embodiment is that the hollow pipe is arranged vertically above the mixing shaft and the hollow nozzle is provided vertically downward, so that the falling energy of water can be effectively utilized to the maximum extent. Besides, the direction of water supply does not change due to fluctuations in water pressure, and it always points vertically downward. The water discharged from this hollow nozzle constantly cleans the vicinity of the mixing axis, including when kneading the mixture, and the water emitted to the mixing axis first hits the mixing axis and then splashes next. By returning it, the inside of the mixing tank is always washed. That is, the water introduced from the hollow nozzle also removes the deposits other than the deposits on the mechanical parts including the mixing shaft in the process of scattering all over the inside of the mixing tank. This characteristic is that the falling energy of water can be utilized reliably and effectively when compared with the conventional device that radiates only water from an oblique direction to the mixing axis. That is, in the case of an oblique direction, as the water drop energy decreases, the water drop point also changes while moving sequentially, so even if it is added to the wide spread of water, the present proposal When the purpose is to clean the vicinity of the mixing axis, the value becomes negative. In general, the vicinity of the mixing axis has more concrete adhesion than the vicinity of the lining plate inside the mixing tank, and the concrete once adhered is extremely unlikely to peel off, so it is clear that it is preferable to configure the structure as proposed. is there.

The reason why the hollow nozzle is provided as a hollow of a certain length as shown in FIG. 2 is to protect the holes from being blocked from the adhesion of cement dust and to improve the directivity of the water discharge direction. Needless to say, the hollow nozzle may be omitted and hollow pipe holes or slits may be directly provided.

Another feature of this embodiment is that the water discharge direction can be changed because the hollow pipe has a rotatable structure. This feature is excellent in that when the mixture is being kneaded, water is evenly scattered on the surface of the mixture for a short time and efficiently mixed into the mixture, and in addition, washing after the kneading work is completed. During the work, the nozzle can be rotated in the direction of the adhering concrete, which is also effective for the work of washing with water.

As another means for achieving the object of this embodiment, the structure in which the mounting angle of the hollow nozzle can be freely changed to change the water discharge direction, or FIG. As shown in FIG. 5, the hollow pipe 15 is preliminarily radially provided with hollow nozzles 16, 16 ', and a switching device is provided for selectively supplying water only to the hollow nozzles at a desired mounting angle. It is also possible to change the emission direction of the. In both cases, the hollow pipe can be directly fixed to the constituent member of the mixing tank without being rotatable.

Another feature of this embodiment is that water can be uniformly dispersed and added, so that the cement smoke generated inside the mixing tank can be quickly calmed down, and it is effective in preventing dust generation. When the cross-sectional area of the discharge port of the hole in the hollow nozzle can be increased / decreased, it is excellent in that water can be atomized or jetted.

5B and 5C show another embodiment of the flow rate regulator. The same figure (b) and the same figure (c) are D of FIG.
Each embodiment of the flow rate regulator when viewed from the same direction as the arrow view seen from -D is shown, and FIG. 9D is a view showing a cross section of the side surface of the main part of FIG. The flow controller shown in FIG. 8B has a simple structure in which a screw 18A screwed into the hollow pipe 15 is used, and the screw 18A is advanced and retracted to change the cross-sectional area of the pipe 15 to adjust the flow rate of water. It is a thing. The flow rate adjusters shown in FIGS. 3C and 3D are provided so that the flat plate Y inserted into the hollow pipe 15 can freely rotate, and also serves to stop and fix the rotation. Stop screw X
Thus, the flat plate Y can be fixed at a desired position. Thus, the flat plate is inclined to change the cross-sectional area of the pipe 15 to adjust the flow rate of water, and it is free to provide a notch or a cavity in a part of the flat plate.

As is clear from the above embodiments, the present invention is effective in removing deposits of mechanical parts in the mixing tank, which was a drawback of the horizontal axis type mixing device, and even in the average dispersion of water. It is a prominent proposal, is an excellent one that uses the falling energy of water most reasonably, and can maximize the original mixing function of the horizontal axis type mixing device.

The above is an example of concrete kneading, but it has been difficult to mix the liquid in the horizontal axis type mixer (dispersed on average into the mixing tank). The problem of charging is that it requires a long time for kneading, and it has many drawbacks such as increasing the variation in the mixing ratio of the mixture. The present invention is also very effective in solving such conventional problems.

[Brief description of drawings]

FIG. 1 is a front view including a partial cross-sectional view showing an embodiment of a liquid supply apparatus according to the present invention, which is attached to a horizontal biaxial mixer used for concrete production, and FIG. 2 is a left side drawing. And FIG. 3 is a right side drawing and FIG. 4 is an AA arrow view showing an internal structure. FIG. 5 (a) is a sectional view taken along the line D-D in FIG. 1, and FIG. 5 (b), (c) and (d) are the respective embodiments of the flow rate regulator viewed from the direction D-d in FIG. FIG. 11, 11 '... Mixing shaft 12 ... Mixing tank 15, 15' ... Hollow pipe (liquid supply pipe) 50, 50 '... Vertical supply means (liquid supply pipe) 60, 60' ... Inclined supply means ( Liquid supply pipe) 16, 16 '... Hollow nozzle (liquid supply pipe) 17 ... Rotary joint 18B, 18B' ... First flow rate regulator (flow rate regulator) 18A, 18A '... Second flow rate regulator ( Flow rate controller) 19 ... Cover 41 ... Mixing blade (mixing member) 43 ... Mixing arm (mixing member) Mixing shaft + Mixing member + ... = Machine parts

Claims (4)

[Claims] 1. A mixing shaft provided with a mixing member around a horizontal rotation axis, a mixing tank having side walls for supporting both ends of the mixing shaft, a cover for closing an upper opening of the mixing tank, A liquid supply pipe for supplying a liquid disposed inside the cover, and the liquid supply pipe is arranged at a vertically upper portion along the axis of the mixing shaft and in the entire region where the mixing member is attached. And a vertical supply means composed of a large number of holes drilled downward in the vertical direction and an inclined supply means composed of a large group of holes drilled in a direction inclined with respect to the vertical downward direction. Liquid supply device for horizontal axis mixer. 2. The horizontal shaft type according to claim 1, wherein the liquid supply pipe is provided with a rotary joint, and the liquid supply pipe is attached to the cover by forming a rotatable structure through the rotary joint. Liquid supply device for mixer. 3. When a liquid from above the outside is branched and distributed to a plurality of liquid supply pipes, each liquid supply pipe is provided with a first flow rate adjuster 18B at an inflow position of the liquid, and further the liquid flows. The second flow rate regulator 18 in the middle of the flow path
The liquid supply device for a horizontal shaft type mixer according to claim 1 or 2, wherein the liquid supply device is configured to include A. 4. The liquid supply pipe according to claim 1, wherein a large number of holes formed in the liquid supply pipe have a structure in which a hollow nozzle for guiding a liquid of a fixed length is attached.
A liquid supply device for a horizontal axis mixer according to any one of items.