JPS6120089Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a storage device for granular materials such as filler (stone powder) and dust that are mixed with asphalt together with aggregate in an asphalt plant to form an asphalt mixture.

Asphalt plants generally produce an asphalt mixture by mixing aggregate, asphalt, and filler (stone powder).

By the way, the dust collected by dust removal back filters installed in asphalt plants has a composition and particle size similar to those of the filler, so it cannot be mixed into the filler and used as part of the filler. can. Conventionally, in order to utilize the above-mentioned dust, a dust storage silo was provided separately from the filler storage silo, and the filler and dust were taken out separately from the filler and dust storage silos and accumulated in one measuring device. It was then weighed, mixed and used to produce asphalt mixture.

However, if the filler and dust are cumulatively weighed using one measuring device as described above, there is a drawback that the measuring time becomes long. Moreover, having a dust storage silo separate from the filler storage silo will cause an increase in the overall plant footprint or, if the plant footprint is limited, the need for other equipment. There is a risk that the installation space will be limited.

This idea was made to solve the above-mentioned drawbacks and problems, and by housing the second silo inside the first silo and installing flow rate regulating valves at the discharge ports of both silos, it is possible to It is an object of the present invention to provide a storage device for powder and granular material that can simultaneously discharge a fixed amount of powder and granular material while requiring a smaller installation space than before.

This invention will be explained below with reference to the drawings.

FIG. 1 shows an embodiment of the storage device for powder and granular materials according to this invention, in which a first discharge part 1b having a first discharge port 1a at the lower end is attached to a funnel-shaped bottom part 1c. A second silo 2 is provided with a second discharge part 2b having a second discharge port 2a at the lower end. penetrates the bottom 1c of the
Moreover, the second discharge port 2a is opened to the outside of the first silo 1 and stored. And the above first
The discharge part 1b includes a first flow rate regulating valve 3, and a first flow rate regulating valve 3.
A second flow rate regulating valve 4 is installed near the second outlet 2a of the second discharge part 2b projecting outside the silo 1, and by operating the regulating valves 3 and 4, The filler etc. stored in the first silo 1 can now separately flow out predetermined amounts of the first granular material A and the second granular material B such as dust stored in the second silo 2. ing. On the other hand, the upper end 2c of the second silo 2 is lower than the ceiling plate 1d of the first silo 1.
It is opened towards. A closing switching chute 7 is attached to both sides of the upper end 2c, and is configured by attaching a switching plate 6 vertically rotatably by a hinge 5. The upper end 2c of the silo 2 can be opened and closed. In addition, the second
One end of an overflow pipe 8 is attached to a side wall near the upper end 2c of the silo 2, with the other end of the overflow pipe 8 extending outside the first silo 1.

Also, the first silo 1 above the second silo 2
An input hole 1e is formed in the ceiling plate 1d, while a separation device is provided above the ceiling plate 1d to separate the pumped air that transports the powder or granular material A or B from the powder or granular material A or B. (Back filter, cyclone, etc.) 9 is the rotary valve 1 for air lock.
0 and is connected to the input hole 1e.

11 is a first pipe connected to one side of the separator 9 for pumping the first granular material A, and 12 is a second pipe connected to the other side of the separator 9 for pumping the second granular material B. The pipes 11a and 12a are the first and second pipes, respectively.
Powder B attached to the pipes 11 and 12 and flowing from the separation device 9 to the first and second pipes 11 and 12,
first and second check valves for preventing spraying of A; 13;
14 is a screw conveyor that conveys and mixes the first and second powder particles A and B flowing out from the first and second discharge ports 1a and 2a; This is a leveler for detecting the full amount of powder and granules attached to the side wall of silo 1.

Next, the operation of the storage device according to the invention constructed as described above will be explained.

First, when storing the first granular material A in the first silo 1, after closing the second silo 2 with the input switching chute 7 as shown by the two-dot chain line in FIG. Powder A is pumped together with air. Then, the air and the first granular material A are separated by the separating device 9, and the first granular material 1 passes through the rotary valve 10 and the input hole 1e, falls onto the upper surface of the switching plate 6, and then It falls from the top surface of the switching plate 6 toward the bottom 1c of the first silo 1 and is stored in the first silo 1.

On the other hand, when storing the second granular material B in the second silo 2, the switching plate 6 of the input switching chute 7 is
The second silo 2 is opened by moving it to the position indicated by the solid line in the figure, and then the second granular material B is pumped together with air from the second pipe 12 and separated by the separation device 9, and the second silo 2 is moved to the position shown by the solid line in the figure. The second granular material B is stored in the container.

In addition, when storing the second granular material B in the first silo 1, the second granular material B may be force-fed from the second pipe 12 after the second silo 2 is closed by the input switching chute 7. Furthermore, when storing the first granular material A in the second silo 2, the input switching chute 7
After opening the second silo 2, the first granular material A may be force-fed from the first pipe 11.

As mentioned above, when storing the powders A and B, two types of powders A and B are stored in the first silo 1. Therefore, the installation space for the silo can be made as small as possible compared to the case where a separate silo is provided.

When using the powder and granular materials A and B, the first and second flow regulating valves 3 and 4 are opened and the powder and granular materials A and B are transferred from the first and second discharge ports 1a and 2a to the screw conveyor 13. A predetermined amount of B is discharged. Then, the discharged powders A and B are conveyed and mixed by the screw conveyor 13. At this time, since the powder particles A and B are discharged in a predetermined amount by the first and second flow rate regulating valves 3 and 4, there is no need to weigh each powder particle separately as in the conventional method. Therefore, powder and granular materials can be weighed at once in a short time.

In addition, the powder and granular materials A and B are transported to the screw conveyor 13.
Since the particles are mixed uniformly by the granules A and B, the quality of the asphalt mixture produced using these powders A and B is stabilized.

FIG. 2 shows another embodiment of the storage device of this invention, in which the same reference numerals as those shown in FIG. 1 indicate the same constituent elements, and their explanation will be omitted. In this embodiment, the purpose is achieved by forming the second outlet 2a in the center of the first outlet 1a.

In addition, in the above embodiment, the first silo 1
Although only the second silo 2 is provided within the first silo 1, it is possible to provide a plurality of silos within the first silo 1. In that case, it is preferable to provide the same number of separation devices 9 as the number of other silos provided in the first silo 1. Additionally, third and fourth silos (not shown) may be further provided within the second silo 2. In this case, third and fourth pipes (not shown) are attached to the separator 9 so that different types of powder can be fed under pressure.

As explained above, this invention has a configuration in which a second silo is provided within the first silo, and a flow rate adjustment valve is provided at each of the discharge ports of the first and second silos. The space can be made smaller than before. Further, with a similar configuration, it is possible to separately discharge a predetermined amount of various types of powder and granular materials, so that the measurement of powder and granular materials can be carried out in a short time. Furthermore, since a charging switching device is provided below the charging hole of the first silo and at the upper end of the second silo, it is possible to separate and smoothly store various types of powder and granules into each silo, and Since the overflow pipe is installed from near the top of the silo to the outside of the first silo, in the event that the second silo becomes full of powder and granules, the powder and granules will pass through the overflow pipe. By quickly leading out of the first silo, it is possible to prevent the powder and granules contained in each silo from mixing with each other without overflowing to the first silo side.

[Brief explanation of the drawing]

FIG. 1 is a schematic cross-sectional view showing one embodiment of the storage device for powder and granular materials of this invention, and FIG. 2 is a schematic cross-sectional view showing another embodiment of the same storage device. 1...First silo, 1a...First discharge port, 1e
...Input hole, 2...Second silo, 2a...Second outlet, 2c...Top end, 3...First flow rate adjustment valve, 4
...Second flow rate adjustment valve, 7...Doing switching chute (doing switching device), 8...Overflow pipe, 9...
...separation device, 10... rotary valve (air lock device), A... first powder and granule, B... second powder and granule.

Claims (1)

[Scope of utility model registration request] An input hole 1e of a first silo 1 having a first discharge port 1a is connected to a separation device 9 for compressed air for transporting the powder and granular materials A and B via an air lock device 10. A second silo 2 having a second discharge port 2a therein is connected to the second discharge port 2a.
a is opened to the outside of the first silo 1, and each of the discharge ports 1a and 2a is provided with flow rate regulating valves 3 and 4, respectively, and the lower part of the input hole 1e of the first silo 1 is At the upper end 2c of the second silo 2, there is provided a charging switching device 7 for switching the charging of the powder and granular materials A and B to each of the silos 1 and 2.
is provided at the upper end 2c of the second silo 2.
Nearby, an overflow pipe 8 has its end connected to a first
A storage device for powder and granular material, characterized in that it is provided to extend outside a silo 1.