JPH0539847Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The invention relates to a material discharge gate at the bottom of a mixing tank located above a twin-shaft mixer installed in a batcher plant for producing ready-mixed concrete. .

[Prior Art] A two-shaft mixer has two kneading shafts supporting kneading blades arranged in parallel between opposing side walls of a kneading tank, and scrapes the kneaded material by rotating the kneading shafts in opposite directions. When mixing and manufacturing ready-mixed concrete, the gravel measuring tank above the mixer and the discharge gate at the bottom of the sand measuring tank are opened and gravel and sand are poured into the mixer all at once. As a result, the kneading load on the mixer increases temporarily. Therefore, as in the invention described in Japanese Patent Publication No. 60-15445, a method has been proposed in which the gravel input gate, which has the greatest effect on the kneading load, is jogged to intermittently introduce gravel to reduce the kneading load.

[Problems to be solved by the invention] However, although the mixing load on the mixer can be reduced by intermittently adding gravel, this type of method requires that the materials be mixed uniformly in a short time. For mixers like this, intermittent input of gravel is not the best method.

Therefore, the present invention prevents a temporary increase in the mixing load by continuously feeding gravel and sand into the mixer in appropriate amounts rather than all at once, and allows the materials to be mixed uniformly in a short period of time. The purpose is to propose a material release gate that can be mixed.

[Means for Solving the Problems] In view of the above points, the present invention aims to achieve the above object by rotating two kneading shafts arranged in parallel in a kneading tank in opposite directions to produce a kneaded material. A rotary leaf feeder with cutting blades arranged radially around the rotating shaft is installed at the material discharge port at the bottom of the measuring tank for the kneaded materials, which is located above the two-shaft mixer that mixes the materials. The present invention provides a material discharge gate for a two-shaft mixer, characterized in that the rotary feeder is equipped with a drive motor that rotates the rotary feeder at a speed such that the materials are dispersed.

[Function] According to the present invention, a rotary feeder having cutting blades arranged radially around the rotating shaft is disposed at the material discharge port at the bottom of the measuring tank above the two-shaft mixer, and after measuring the gravel and sand, When the rotary feeder is rotated at an appropriate speed by the drive device, the gravel and sand in the measuring tank are cut out in fixed quantities by the cutting blades, so the materials are not thrown into the mixer all at once, and the kneading load is reduced temporarily. There is no sharp increase in the target. In addition, since the materials are continuously dispersed into the mixer in fixed amounts, the materials are properly mixed at the time they are introduced into the mixer, so that kneading is carried out quickly.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

1 is a biaxial mixer, in which two parallel kneading shafts 2 and 2' pass through a kneading tank 3 and are rotatably supported in opposite directions, and the kneading shafts 2 and 2' have an axis line. A number of arms (not shown) protrude perpendicularly to the axis in a spiral shape along the axis, and a kneading blade (not shown) is attached to the tip of the arm. The kneaded material is moved along the axis while being scraped up and kneaded. 4 is a gravel measuring tank, and 5 is a sand measuring tank, which are disposed above the two-shaft mixer 1 and measure a predetermined amount of gravel and sand.

The material discharge ports 6 and 7 at the bottom of the gravel measuring tank 4 and sand measuring tank 5 have material discharge gates for cutting out a fixed amount of material. As shown in FIG. 3, this material discharge gate consists of a rotary leaf feeder 10 having an appropriate number of cut-out blades 9 arranged radially around a rotating shaft 8.
The rotary feeder 10 is controlled by bearings 11 attached to both sides of the material discharge ports 6 and 7.
A sprocket 12 is rotatably supported and fixed to one side of the rotating shaft 8, a gravel measuring tank 4, and a sand measuring tank 5.
A chain 15 is wound around a sprocket 14 attached to a drive motor 13 provided on the side of the shaft, and the chain 15 is rotated by the drive motor 13 at a predetermined number of rotations. At this time, the rotation speed of the motor 13 may be made variable by an inverter, and the motor 13 may be rotated while changing the rotation speed. Numeral 16 is a rubber plate disposed on the lower side wall of the gravel measuring tank 4 and the sand measuring tank 5, which comes into contact with the cut-out blade 9 of the rotary leaf feeder 10 and prevents the material from falling out when measuring the material, and is necessary. Attach accordingly.

After measuring a predetermined amount of gravel and sand in the gravel measuring tank 4 and the sand measuring tank 5, when the rotary feeders 10 at the bottom of the gravel measuring tank 4 and the sand measuring tank 5 are rotated inwardly, the inside of the measuring tank is The material is continuously cut into the two-shaft mixer 1 in fixed quantities by the rotating cutting blade 9, so that when the material is fed into the two-shaft mixer 1, the gravel and sand are appropriately mixed. This allows the materials to be mixed more uniformly within a short time.

In addition, as a secondary effect, since the material is cut out quantitatively and put into the twin-screw mixer 1, the kneading load on the mixer does not temporarily increase, and there is a margin in the power required during kneading. It is also possible to reduce the motor capacity of the shaft mixer 1, and it is also possible to use a motor with the same capacity to increase the rotation speed and shorten the kneading time.

Although the rotary leaf feeder 10 is arranged below the gravel measuring tank 4 and sand measuring tank 5, a charging chute is arranged below the gravel measuring tank 4 and sand measuring tank 5, and a rotary leaf feeder is installed below the charging chute. Ida may also be placed.

[Effect of the invention] As described above, in the present invention, the two-shaft mixer 1
A rotary leaf feeder 10 having rotatable cut-out blades at the bottom of a kneading material measuring tank disposed above the kneading material measuring tank.
is arranged, and when the kneaded material is introduced, the cut-out blades 9 of the rotary feeder 10 are rotated inwardly to each other, and the kneaded material is continuously dispersed into the biaxial mixer 1 in fixed amounts, so that the kneaded materials are mixed with each other. The mixture is put into the kneading tank in the same state, thereby shortening the kneading time and increasing the kneading efficiency.

In addition, since the materials are not fed into the two-shaft mixer 1 all at once, but are fed quantitatively and continuously, the kneading load does not increase temporarily and there is sufficient power during kneading, allowing the motor capacity to be increased. It is also possible to reduce the kneading time by increasing the rotational speed while keeping the motor capacity the same.

[Brief description of the drawings]

FIG. 1 is a partially sectional front view showing an embodiment of the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a perspective view of the rotary leaf feeder of the present invention. 1...Two-shaft mixer, 2,2'...Kneading shaft, 3...
...kneading tank, 4...gravel measuring tank, 5...sand measuring tank,
6... Gravel discharge port, 7... Sand discharge port, 8... Rotating shaft, 9... Cutting blade, 10... Rotary leaf feeder.

Claims (1)

[Scope of utility model registration request] Two kneading shafts arranged in parallel in the kneading tank are rotated in opposite directions to mix the kneaded materials.The material discharge port at the bottom of the measuring tank for the kneaded materials located above the two-shaft mixer rotates in opposite directions to rotate the two kneading shafts arranged in parallel in the kneading tank. A rotary feeder having cutting blades arranged around it in a radial manner is provided, and the rotary feeder is equipped with a drive motor that rotates the rotary feeder at a speed such that the material to be discharged is dispersed within the mixer. A material discharge gate to a two-shaft mixer featuring: