JPS6215282Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an asphalt plant that produces asphalt mixture used for the surface base layer and roadbed of asphalt pavement.

As is well known, in an asphalt plant, aggregate is dried and heated using a dryer, a predetermined amount of the aggregate is measured in an aggregate measuring tank, and the aggregate is fed into a mixer and mixed with filler, asphalt, etc. in a predetermined mixing ratio. The mixture is mixed to produce asphalt composite material.

Incidentally, the exhaust gas generated by the dryer contains a large amount of dust, and this dust is collected by a dust collector. Then, along with the filler taken out from the filler tank, the filler
The dust is sent to the dust measuring tank, where it is weighed, and mixed with aggregate, etc., in the mixer mentioned above. However, in the past, in the process of sending the filler and dust to the filler dust measuring tank, dedicated equipment was customarily used for each of the filler and dust.
The overall equipment of the asphalt plant was becoming more complex.

The present invention was developed in view of the above circumstances, and is designed to transport filler and dust to a shared storage pin using a shared transport device, and then take out a predetermined amount from this storage pin and send it to the filler/dust measuring tank. The purpose of the present invention is to provide an asphalt plant that simplifies the entire equipment, reduces equipment costs, and improves operability.

Hereinafter, the present invention will be explained based on the drawings.

Figure 1 shows an embodiment of the asphalt plant of the present invention, showing an aggregate yard 1 that stores aggregate Ag and aggregates taken out from this aggregate yard 1.
A dryer 2 for drying and heating Ag, a hot elevator 3 for transporting aggregate Ag dried and heated by this dryer 2, a screen 4 for classifying aggregate Ag transported by this hot elevator 3, and a screen 4 for classifying aggregate Ag transported by this hot elevator 3. A hot pin 5 that accommodates the classified aggregate Ag, and aggregate Ag from this hot pin 5.
It has an aggregate measuring tank 6 for taking out and weighing a predetermined amount of aggregate, a filler tank 7 for storing filler F, and a screw conveyor 8 to transport the filler F taken out from the filler tank 7 together with dust D to be described later. A bucket elevator (transport device) 9 and a storage pin 1 that accommodates the filler F and dust D transported by the bucket elevator 9.
0, and a filler/dust measuring tank 11 for taking out and weighing a predetermined amount of filler F and dust D from this accommodation pin 10. Then, the aggregate Ag weighed in the aggregate measuring tank 6 and the filler F and dust D weighed in the filler/dust measuring tank 11 are fed into a mixer 12 to asphalt As.
Asphalt composite material is now being manufactured by mixing with other materials.

Further, an exhaust fan 14 is connected to the dryer 2 via a duct 15, which sucks exhaust gas generated in the dryer 2 and releases it into the atmosphere from a chimney 13. A two-stage cyclone (dust collector) 16 and a bag filter (dust collector) 17 are provided to remove dust and collect dust D in the exhaust gas. The dust D collected by the cyclone 16 is fed into the input port 3a of the hot elevator 3, and the dust D collected by the bag filter 17 is fed into the bag filter 1.
The screw conveyor 18 provided at the lower part of the bucket elevator 9 is configured to input the screws into the input ports 9a of the bucket elevator 9, respectively.

In the figure, reference numeral 19 denotes an asphalt measuring tank, and asphalt As sent from an asphalt tank (not shown) is measured in this asphalt measuring tank 19 and supplied to the mixer 12. Further, 20 in the figure is a duct that guides scavenging air generated in the screen 4 and the like to the cyclone 16.

Next, the operation of the present invention configured as described above will be explained.

When producing asphalt mixture in the asphalt plant of the present invention, first, aggregate Ag of various particle sizes is taken out from the aggregate yard 1 and transported together to the dryer 2, where it is dried and heated until it reaches a predetermined temperature. Dry and heated aggregate Ag is sent to a screen 4 by a hot elevator 3, classified according to particle size, and stored in a hot pin 5. Next, a predetermined amount of aggregate Ag is taken out from the hot pin 5, weighed in an aggregate measuring tank 6, and charged into a mixer 12. Further, the exhaust gas generated by the dryer 2 is removed in multiple stages by a cyclone 16 and a bag filter 17, and the dust D collected by the cyclone 16 is transferred to the hot elevator 3.
Further, the dust D collected by the bag filter 17 is taken out by the screw conveyor 18 and thrown into the bucket elevator 9. Furthermore, the filler F is taken out from the filler tank 7 by the screw conveyor 8 and put into the bucket elevator 9, and is conveyed together with the dust D to the storage pin 10 and stored therein. Then, a predetermined amount of filler F and dust D are taken out from this accommodation pin 10, and the filler
The dust is weighed in the dust measuring tank 11, and the weighed filler F and dust D are placed in the asphalt.
When it is put into the mixer 12 together with As, additives, etc., and mixed with the aggregate Ag, an asphalt composite material is manufactured.

Here, in the process of conveying the filler F taken out from the filler tank 7 and the dust D collected by the bag filter 17 to the filler/dust measuring tank 11, the bucket elevator 9 and the accommodation pin 10 move both the filler F and the dust D. Since it is shared by
The configuration of the entire equipment is simplified.

By the way, the amount of filler F that is mixed to produce, for example, one ton of normal quality asphalt mixture is about 50 to 80 kg, but the amount of dust D that is recovered is only 3 to 5 kg. . Therefore, the dust D is not always supplied to the mixer 12 little by little, but may be supplied in a predetermined amount all at once.

Further, in the above, the filler F and dust D taken out from the filler tank 7 and the bag filter 17 were separately put into the common bucket elevator 9, but as shown in FIG. Screw conveyor 8
The outlet 8a of the bucket elevator 9 is connected to the inlet 9 of the bucket elevator 9.
When the discharge port 18a of the screw conveyor 18 for taking out the dust D is connected to a predetermined position of the screw conveyor 8, the filler F
This is advantageous because the dust D is mixed with the filler F as it is transferred by the screw conveyor 8. Furthermore, as shown in FIG. 3, an outlet 8a of the screw conveyor 8 disposed at the input opening 9a of the bucket elevator 9 is rotated in conjunction with the rotation of the shaft 8b of the screw conveyor 8. A stirring blade 21 is provided, and a dust D
Discharge port 18 of screw conveyor 18 for taking out
It is also possible to connect a to mix the filler F and the dust D using the stirring blade 21.

As described above, in the asphalt plant of the present invention, common equipment is provided for both the filler and dust in the process of transporting the filler and dust from the filler tank and dust collector to the filler/dust measuring tank. This simplifies the overall configuration of the equipment. Therefore, the equipment cost is reduced and the operability is improved.

[Brief explanation of drawings]

Figure 1 is an overall schematic diagram showing one embodiment of the present invention, Figure 2 is an enlarged view of the main part showing an example of equipment that takes into account the mixing performance of filler and dust, and Figure 3 is an enlarged view of the main part of the same part broken. It is a diagram. F... Filler, D... Dust, 2... Dryer, 6... Aggregate measuring tank, 7... Filler tank,
8...Screw conveyor, 9...Bucket elevator (conveyance device), 10...Accommodating pin, 11...
Filler/dust measuring tank, 12...Mixer, 17
... Buzz filter (dust collector), 18 ... Screw conveyor.

Claims (1)

[Scope of utility model registration request] The aggregate is dried and heated in a dryer, and a predetermined amount of it is measured in an aggregate measuring tank. Dust in the exhaust gas generated by the dryer is collected by a dust collector, and this dust is collected together with the filler in the filler tank as filler dust. While sending it to a measuring tank and weighing a predetermined amount, the aggregate measured in the aggregate measuring tank and the filler and dust measured in the filler/dust measuring tank are mixed together with asphalt etc. in a mixer to produce an asphalt mixture. In an asphalt plant, there is a shared transport device that transports the dust collected by the dust collector and the filler in the filler tank, and a filler/dust measuring tank that accommodates the dust and filler transported by this shared transport device. An asphalt plant characterized by comprising: a shared storage bin for sending to the asphalt plant;