JPH0546401B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an apparatus for manufacturing asphalt mixture, which is a road paving material, and in particular, a device for manufacturing asphalt mixture, which is a road paving material, and in particular, for producing heated aggregate mixed based on the composition of asphalt mixture in an asphalt plant. The present invention relates to an apparatus for manufacturing asphalt mixture by storing heated aggregates in aggregate silos according to their composition and extracting heated aggregates from a desired aggregate silo when necessary.

[Prior art] Asphalt plants use asphalt in order to cope with the temporary concentration of shipments of asphalt mixture, or to reduce fuel consumption by minimizing the intermittent operation of the dryer that heats and dries the aggregate. Asphalt mixture silos are installed side by side to temporarily store the asphalt mixture mixed and adjusted at the plant.

[Problems to be solved by the invention] However, in an asphalt mixture silo, storing the asphalt mixture for a long time may cause oxidative deterioration of the asphalt contained in the asphalt mixture or volatilization of the low boiling point of asphalt. Although various efforts have been made to address these problems, it is considered difficult to maintain the initial quality. Therefore, in the present invention, a high-quality asphalt mixture can be manufactured by storing heated aggregates that have been formulated without asphalt, which affects the quality of the product, and adding asphalt at the time of shipment to adjust the mixture. In addition, it is an object of the present invention to provide an apparatus that can reduce the cost of the apparatus by devising a mixing adjustment mechanism when a plurality of aggregate silos are installed.

[Means for solving the problems] In view of the above points, in order to achieve the above object, the present invention has an input port at the top and a discharge port at the bottom,
A running rail is installed below the discharge port of a plurality of aggregate silos with a heat-retaining structure that stores heated aggregate, and a support frame that can freely run along the running rail is installed on the running rail. A mixer equipped with a measuring means and an asphalt measuring tank are arranged on the support frame, and piping with asphalt injection nozzles facing downward and arranged at appropriate intervals is installed inside the mixer, and the piping is connected to the mixer. The mixer is connected to the discharge part of the asphalt measuring tank via a pump, and the mixer and asphalt measuring tank placed on the support frame are moved to the lower part of a predetermined aggregate silo, and asphalt is added to the discharged aggregate. The present invention provides an asphalt mixture manufacturing apparatus characterized in that it is configured to manufacture asphalt mixture.

[Function] According to the present invention, in a known asphalt plant, heated aggregates mixed based on the composition of asphalt mixture are stored in advance in aggregate silos according to their composition, and placed on a support frame at the time of shipment. A mixer equipped with a measuring device and an asphalt measuring tank are moved to a lower level of a predetermined aggregate silo, the heated aggregate stored in the aggregate silo is measured by the mixer for one batch, and the asphalt is weighed in the asphalt measuring tank. A predetermined amount of asphalt is measured, and the asphalt measured in the asphalt measuring tank is pumped from an asphalt injection nozzle installed in the upper part of the mixer through piping and injected, mixed and adjusted, and shipped as a desired asphalt mixture. That's what I do.

[Example] An embodiment of the present invention will be described based on the drawings.

The asphalt mixture manufacturing device includes an aggregate silo 1 for temporarily storing heated aggregate, a conveying device 2 for conveying the heated aggregate above the aggregate silo 1, a mixer 3 disposed below the aggregate silo 1, and asphalt weighing. Device 4
It consists of

The aggregate silo 1 is placed on a pedestal 5, has a material input port 6 at the top and a material discharge port 7 at the bottom, and temporarily stores heated aggregates mixed based on the composition of asphalt mixture according to their composition. It has a heating and insulation structure, and several of them are installed in parallel as appropriate.

The conveying device 2 has a pair of guide rails 8 whose sliding surfaces are channel-shaped steel inner surfaces facing each other at a predetermined interval, and is pulled out horizontally from the lower position of the mixer 9 of the known asphalt plant A, and is moved from the lower part of the aggregate silo to the upper part. A lifting rope 12 such as a wire rope is connected to a bucket 11 for transporting heated aggregates, which is installed across the material input port 6 and rotatably equipped with a roller 10 that rotates in sliding contact with the sliding surface of the guide rail 8. One end of the lifting cable 12 is fastened, and the other end of the lifting cable 12 is fastened to a winch 14 via a rotatably arranged pulley 13 in order.
The bucket 11 for conveying heated aggregates is raised and lowered by rolling in and feeding out the heated aggregate 2, and reciprocated between a position below the mixer 9 and a position directly above the material input port 6 of the aggregate silo 1.

The mixer 3 has approximately the same structure as the mixer 9 of the known asphalt plant A, and has an arm pivoted in a radial direction to two parallel kneading shafts rotating in opposite directions, and has an arm attached to the tip of the arm. It is equipped with mixing blades and mixes materials by a drive motor 15, and is placed on a weighing frame 16. The weighing frame 16 on which the mixer 3 is mounted has a load cell 18 on a support frame 17. The weight of the heated aggregate suspended from the aggregate silo 1 to the mixer 3 can be detected.

The asphalt measuring device 4 has an asphalt measuring tank 20 suspended from a support frame 19 erected on a support frame 17 on the side of the mixer 3 through a hammer 21 and a load cell 22 at its point of action. ) The amount of molten asphalt introduced from the inlet 25 can be measured by switching a three-way valve 24 disposed on a supply pipe 23 connected to the inlet 25. Reference numeral 26 denotes a pipe installed in the upper part of the mixer 3, in which a plurality of asphalt injection nozzles 27 are arranged downward at appropriate intervals. It is connected to the lower discharge part of the asphalt measuring tank 20.

Wheels 29 are provided at the front, rear, left and right of the lower part of the support frame 17.
is provided, and when multiple aggregate silos 1 are installed, a rail 3 that spans between the aggregate silos 1 is provided.
A support frame 17 on which a mixer 3 and an asphalt measuring device 4 are mounted is movable above the silo 1 and is controlled to move below the material discharge port 7 of the aggregate silo 1 from which heated aggregate is discharged.

Thus, the aggregate heated by a dryer (not shown) of a known asphalt plant A is passed through a vibrating sieve 31.
A storage bin 32 in which particles are sieved by particle size and stored.
One batch of heated aggregate is added to the aggregate measuring tank 33 based on the mix of aggregates commonly used as asphalt mix, for example, dense grain size, coarse grain size, etc.
A predetermined amount of stone powder measured in the stone powder measuring tank 34 is added to the mixer 9 and mixed, and then discharged into a heated aggregate transport bucket 11 and transported to the aggregate silo 1. Although it is a thing,
If fine aggregate particles or stone powder are scattered during discharge into the heated aggregate transport bucket 11 or during transportation, which is unfavorable in terms of pollution, an appropriate amount of asphalt is measured and added in the asphalt measuring tank 35 to form fine powder. It is preferable to prevent it from scattering.

The heated aggregate loaded into the heated aggregate transport bucket 11 is transported to the upper part of the aggregate silo 1 and stored in the aggregate silo 1 according to its composition. By repeating this process, heated aggregates of different compositions are stored in the aggregate silo 1. For example, one of the aggregate silos 1 stores dense-grained aggregates, and the other of the aggregate silos 1 stores coarse-grained aggregates. Store the heated aggregate of the composition.

If dense-grain asphalt asphalt is required, the support frame 17 on which the mixer 3 and asphalt weighing device 4 are mounted is mounted on the rail 30 below the material discharge port 7 of the aggregate silo 1 that stores heated aggregate with a dense-grain mixture.
One batch of heated aggregate is put into the mixer 3, weighed, and transferred to the asphalt measuring tank 20.
A predetermined amount of asphalt is weighed, the asphalt is injected from the asphalt injection nozzle 27 by driving the pump 28, and mixed and adjusted to produce dense-grained asphalt and shipped in desired batches. If coarse-grained asphalt is required, the support frame 17 on which the mixer 3 and asphalt weighing device 4 are mounted is placed on the rail 30 below the material discharge port 7 of the aggregate silo 1 that stores heated aggregate with a coarse-grained mixture. This is to manufacture and ship coarse-grained ascon in the same way as described above.

Although the mixer 3 of the apparatus of the present invention has a structure that also serves as a weighing machine, this is to lower the height of the apparatus as much as possible, and a structure in which a measuring tank is disposed above the mixer 3 may also be used.

[Effects of the Invention] As described above, in the apparatus of the present invention, the mixer 3 and the mixer 3 are equipped with a measuring device that stores the heated aggregates heated and mixed in an asphalt plant according to their composition and is placed on the support frame 17 at the time of shipment. The asphalt measuring device 4 is appropriately moved to the lower part of a predetermined aggregate silo 1, one batch of heated aggregate is measured by the mixer 3, and a predetermined amount of asphalt weighed by the asphalt measuring device 4 is injected into the mixer 3 and mixed. Since this adjustment has been made, it is possible to manufacture and ship high-quality asphalt composite material. Furthermore, even if there are a plurality of aggregate silos, only one mixer and asphalt measuring device is required, which makes it possible to lower the cost of the device and lighten the economic burden.

[Brief explanation of the drawing]

FIG. 1 is a schematic configuration diagram showing one embodiment of the present invention, and FIG. 2 is a partially cutaway schematic enlarged view of the lower part of the aggregate silo in FIG. 1. 1... Aggregate silo, 3... Mixer, 4... Asphalt measuring device, 6... Material input port, 7... Material discharge port, 26... Piping, 27... Injection nozzle,
28...Pump.

Claims (1)

[Claims] 1. A running rail is installed below the discharge port of an aggregate silo that has an input port at the top and a discharge port at the bottom and has a heat-retaining structure and stores multiple heated aggregates, and a running rail is installed on the running rail. A support frame that can run freely along a running rail is provided, a mixer equipped with a measuring means and an asphalt measuring tank are arranged on the support frame, and an asphalt injection nozzle is directed downward at an upper part inside the mixer. The mixer and asphalt measuring tank mounted on the support frame are installed in the interior with piping arranged at appropriate intervals, and the pipes are connected to the discharge part of the asphalt measuring tank through a pump, and the mixer and asphalt measuring tank placed on the support frame are connected to the lower part of the specified aggregate silo. 1. An asphalt mixture manufacturing apparatus, characterized in that it is configured to add asphalt to aggregates moved and discharged to produce a desired asphalt mixture.