JP3122645B2 - Apparatus for producing both asphalt mixture and form asphalt mixture - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing ordinary asphalt mixture and foamed asphalt mixture, and more particularly to a combined production apparatus for asphalt mixture and foamed asphalt mixture for surely preventing clogging of an injection nozzle. About.

[0002]

2. Description of the Related Art FIG. 4 shows an example of a conventional production apparatus for producing an ordinary asphalt mixture. This manufacturing apparatus is roughly divided into an asphalt supply section A, an aggregate supply section B, and a mixing / kneading section C. Liquid asphalt supplied from the asphalt tank 7 by the asphalt supply pump 8 is measured in the asphalt measuring tank 9, and a predetermined amount of asphalt is injected from the asphalt injection pump 10 into the supply pipe 11. Aggregate measuring tank 13 of aggregate supply unit B disposed at the tip of supply pipe 11
Supplies the aggregate corresponding to the asphalt supply amount. The asphalt in the supply pipe 11 is supplied from a spray nozzle 12 disposed on the tip side thereof into the tank 14 of the mixing / kneading section C, and is mixed with the aggregate in the tank 14. A blade 15 is provided in the tank 14, and asphalt and aggregate are kneaded to produce an asphalt mixture.

[0003]

Conventionally, a foam door asphalt mixture has been produced in which steam, hot water or water is injected into a molten asphalt supply system to form asphalt into a foam and mix it with aggregate. Have been. However, asphalt mixture is not generally included in the category of special asphalt mixture, so the asphalt mixture production equipment naturally needs to also produce general asphalt mixture. Conventional asphalt manufacturing equipment
When a general asphalt mixture is manufactured, the molten asphalt flows back to the injection nozzle for spraying steam, hot water or water necessary for manufacturing the form asphalt, and the nozzle is blocked, so that the foam asphalt mixture is manufactured. In doing so, the entire device had to be cleaned.

As a known technique for producing the asphalt mixture or full O over Mudo asphalt, for example, Kokoku 5-1
No. 841 and Japanese Utility Model Laid-Open No. 57-26408.
The former is intended to disclose a technique for mixing and stirring the mixture, and a full O over Mudo asphalt produced Separately, etc. between the aggregate and the mineral fine material and the fluid. On the other hand, after the user is to disclose a technique for producing a water good foamed asphalt having the mixing ratio is injected to within the asphalt heated by a heater or the like is injected into the asphalt <br/> Aruto.

[0005] A foam door asphalt manufacturing apparatus in which an injection nozzle (not shown) is provided in a supply pipe 11 of the conventional asphalt manufacturing apparatus shown in FIG. In the case of the manufacturing apparatus described in the above, if an ordinary asphalt mixture is to be manufactured by the manufacturing apparatus, asphalt adheres to the injection nozzle and clogging occurs. Therefore, foam door asphalt cannot be manufactured unless the injection nozzle is clogged. However, in order to remove asphalt adhering to the injection nozzle, it is necessary to remove the injection nozzle, which is extremely troublesome and has a problem of lowering the operation rate of the apparatus.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, prevents clogging of an injection nozzle, can produce both a foam door asphalt mixture and an asphalt mixture with a single device, and reduces equipment costs. It is an object of the present invention to provide an asphalt mixture and a foamed asphalt mixture dual-purpose production apparatus having a relatively simple structure capable of reducing and saving space.

[0007]

According to the present invention, an asphalt injection pump for injecting a predetermined amount of liquid asphalt that has been metered in order to achieve the above object is provided by an apparatus for producing both asphalt mixture and foamed asphalt mixture according to the present invention. And a supply line connected to the asphalt injection pump, a detachable injection nozzle for injecting water or air provided in the supply line, and an aggregate supply disposed at a distal end side of the supply line. parts and the mixing and kneading section for mixing and kneading the aggregate where quantification that will be supplied supply line asphalt or foamed bitumen is sprayed from a spray nozzle provided at an end of the from the aggregate supply unit A pressure medium supply unit for supplying pressurized water or pressurized air via a distribution valve to the injection nozzle for injecting water or air. The dispensing valve, during normal asphalt mixture fabrication communicated with said injection nozzle and compressed air, at the time of foamed asphalt mixture produced is characterized by communicating the said injection nozzle and pressurized water.
Also, during the production of foam asphalt mixture,
Is said water or injection nozzle injection nozzle with a check valve for injecting air, asphalt of the liquid is Isa injection at pressures of about 3-4 kg / c m @ 2 from the asphalt injection pump, supplied from the pressure medium supply unit the water is characterized in that it is injected at a pressure of 25~100kg / c m2 from the injection nozzle with the check valve, furthermore, at the time of manufacture of the asphalt mixture, an injection nozzle for injecting the water or air check a valved injection nozzle, the air injected from the injection nozzle is characterized in that it is injected at 4 kg / c m @ 2 or more pressure thereon, asphalt liquid to be injected into the supply conduit of the asphalt In the discharging time, the pressurized water from the injection nozzle is injected with a delay of one second at the same time as the start of asphalt injection.

[0008] Foam door asphalt is manufactured by injecting pressurized water from an injection nozzle into liquid asphalt injected into a supply pipe. In this case, since the pressure of the pressurized water from the injection nozzle is higher than the injection pressure of asphalt, clogging of the injection nozzle does not occur. Further, in the case where the injection nozzle with the check valve is used, even when the pressure of the pressurized water becomes lower than the injection pressure of the asphalt, the check valve operates to prevent the injection nozzle from being blocked. On the other hand, when producing a normal asphalt mixture, the injection of the pressurized water from the injection pump is stopped, but the compressed air is injected from the injection pump. Since the injection pressure of the compressed air is higher than the injection pressure of the asphalt, clogging of the injection nozzle is also eliminated in this case. Even in this case, when the injection nozzle with the check valve is used, the injection nozzle does not close even when the injection pressure of the compressed air becomes lower than the injection pressure of the asphalt. Switching between the pressurized water and the pressurized air is easily performed by a distributing operation of a distributing valve interposed between the injection pump and the pressurized water supply unit and the pressurized air supply unit.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an embodiment of an asphalt mixture and foamed asphalt mixture production apparatus according to the present invention will be described in detail with reference to the drawings. As shown in FIG. 1, an asphalt mixture and a foamed asphalt mixture dual-purpose production apparatus are roughly classified into asphalt supply units A.
, An aggregate supply section B, a mixing / kneading section C, and a pressure medium supply section D for injecting pressurized water and air. Hereinafter, A to D will be described in order.

The asphalt supply section A comprises an asphalt tank 7, an asphalt supply pump 8, an asphalt measuring tank 9, an asphalt injection pump 10, and the like. A predetermined amount of liquid asphalt measured from the asphalt tank 7 is supplied from the asphalt injection pump. It is injected into the pipeline 11. The asphalt supply pump 8 is, for example, a gear pump, and the asphalt injection pump 1
From 0, molten asphalt at a temperature of about 160 DEG C. is injected at a pressure of about 3-4 kg / cm @ 2. Further, a spray nozzle 12 is provided at the tip of the supply pipe 11.

The aggregate supply section B has an aggregate measuring tank 13 and the like, and has a structure capable of storing and supplying a predetermined amount of aggregate mixed with asphalt. The structure is known. Various known materials are also used as the aggregate. The amount of asphalt sent out from the supply line 11 is supplied in an amount corresponding to the amount of a predetermined amount of aggregate supplied from the aggregate supply section B, and the asphalt and aggregate discharged from the spray nozzle 12 are mixed. And mixing / kneading part C
Supplied to

The mixing / kneading section C comprises a tank 14 for kneading asphalt and aggregate, a blade 15 rotatably provided in the tank 14, blade driving means (not shown), and the like.

The pressure medium supply section D includes a detachable injection nozzle 1 disposed at an intermediate portion in the supply pipe 11, an electromagnetic valve 2 which is one of distribution valves connected thereto, and an electromagnetic valve. 2, a pressurizing pump 3 and an air compressor 6, etc.
A water tank 4 is connected to the pressurizing pump 3, and the water tank 4 is connected to a water source 5. The solenoid valve 2 includes a switching valve, and is configured to selectively send out pressurized water or pressurized air to the injection nozzle 1 side. With the above structure, the water introduced into the pressurizing pump 3 from the water source 5 via the water tank 4 is injected from the injection nozzle 1 as approximately 25 to 100 kg / cm 2 of pressure water. On the other hand, the compressed air from the air compressor 6 is injected from the injection nozzle as a pressure of 4 kg / cm2 or more, for example, 7 kg / cm2.

Next, a method for producing a foam door asphalt mixture by the production apparatus will be described with reference to FIGS. 1 and 2. When manufacturing foam door asphalt, only pressurized water is injected from a normal injection nozzle 1 or an injection nozzle 1 with a check valve. That is, asphalt from the asphalt supply section A is supplied to the supply pipe 11 at 160 ° C. at about 4 kg / cm 2 by the asphalt injection pump 10 as described above.
It is injected in the state of. The pressure injected from the injection nozzle 1 to this asphalt in a molten state is 25 to 100 kg / cm.
When pressure water is applied, asphalt reacts with water and becomes hollow. This hollow asphalt is called foam door asphalt, and its surface area is about ten times as large as that of ordinary asphalt in a non-hollow state. Therefore, the mixture with the aggregate becomes extremely dense, and a highly uniform mixture can be formed. The foamed asphalt is sprayed from a spray nozzle 12, is charged into the tank 14 of the mixing / kneading section C in a state of being mixed with the aggregate from the aggregate supply section B, is kneaded by the blade 15, and is formed by the foamed asphalt. It becomes a mixture. When manufacturing foam door asphalt, as described above, it is necessary that the pressure, injection amount, temperature, pressure water injection amount, pressure, etc. of the injected asphalt satisfy predetermined conditions. In general, the control of the injection amount of asphalt and pressure water is performed by the ejection time. For example, in this example, a method of injecting asphalt for about 5 seconds and ejecting pressure water with a delay of about 0.5 seconds is applied. In addition, asphalt is generally weighed by an asphalt weighing tank 9, but a method of discharging asphalt for a predetermined time and calculating an injection amount per hour is also theoretically adopted as a simple means.

Next, a method for producing a general asphalt mixture using the present production apparatus will be described with reference to FIGS.
In this case as well, pressurized air is injected from the normal injection nozzle 1 or the injection nozzle 1 with a check valve instead of the pressurized water. In the case of ordinary asphalt, there is no need to actually inject anything from the spray nozzle 1, and molten asphalt of about 4 kg / cm 2 at about 160 ° C. is sprayed into the supply pipe 11, and this is sprayed by the spray nozzle 12. Mixing / kneading part C
Side, and an aggregate corresponding to the asphalt supply amount may be supplied from the aggregate supply section B. However,
The injection nozzle 1 is provided in the supply pipe 11 and the diameter of the injection nozzle 1 is small, so that the injection nozzle 1 is clogged in this state. Therefore, in the present invention, during the production of general asphalt, the solenoid valve 2 is switched, the injection nozzle 1 is connected to the air compressor 6 instead of the pressure water, and the injection pressure of the asphalt from the injection nozzle 1 is 4 kg.
A pressure air higher than 2 kg / cm @ 2, for example, 7 kg / cm @ 2 is injected. As described above, clogging of the injection nozzle 1 is completely prevented.
When clogging is used, clogging of the injection nozzle 1 can be reliably prevented.

As described above, by switching the solenoid valve 2, both the foam door asphalt mixture and the general asphalt mixture can be manufactured using the same manufacturing apparatus, and no problems such as clogging occur. . In the above description, the solenoid valve 2 is used as the distribution valve, but the present invention is not limited to this. Further, the configuration of the pressure medium supply unit D is not limited to the illustrated one.

[0017]

According to the present invention, a normal asphalt mixture and a foam door asphalt mixture can be produced smoothly and without clogging by a single production apparatus, thereby reducing equipment costs and saving space. be able to.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an asphalt mixture and a foam door asphalt mixture production apparatus according to the present invention.

FIG. 2 is a schematic diagram for explaining a method for producing a foam door asphalt mixture by the combined production apparatus for asphalt mixture and foam asphalt mixture of the present invention.

FIG. 3 is a schematic diagram for explaining a method for producing a normal asphalt mixture by the combined production apparatus for asphalt mixture and foamed asphalt mixture of the present invention.

FIG. 4 is a configuration diagram of a conventional manufacturing apparatus for manufacturing an asphalt mixture.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Injection nozzle 2 Solenoid valve 3 Pressure pump 4 Water tank 5 Water source 6 Air compressor 7 Asphalt tank 8 Asphalt supply pump 9 Asphalt measuring tank 10 Asphalt injection pump 11 Supply pipeline 12 Spray nozzle 13 Aggregate measuring tank 14 Tank 15 Blade A Asphalt supply section B Aggregate supply section C Mixing / kneading section D Pressure medium supply section

Claims (4)

(57) [Claims] An asphalt injection pump for injecting a predetermined amount of liquid asphalt, a supply pipe connected to the asphalt injection pump, and a detachable pipe for injecting water or air provided in the supply pipe. A flexible spray nozzle, an aggregate supply unit disposed on the tip side of the supply line, asphalt or foam door asphalt ejected from a spray nozzle provided at an end of the supply line, and the aggregate supply the apparatus having a mixing and kneading section for mixing and kneading the aggregate where quantification that will be supplied from the parts, the pressure water supply or compressed air via a distributor valve to the injection nozzle for injecting the water or air A pressure medium supply unit for supplying is connected, and the distribution valve communicates the pressurized air with the injection nozzle during normal asphalt mixture production, and when the foamed asphalt mixture is produced. Combined apparatus for producing asphalt mixture and foamed asphalt mixture, characterized in that communicating with the injection nozzle with the pressure water. 2. In the production of a foam door asphalt mixture, the injection nozzle for injecting water or air is an injection nozzle with a check valve, and the liquid asphalt is supplied from an asphalt injection pump by about 3 to 3 times. in the pressure of 4kg / c m2
Is Isa injection, according to claim 1, the water supplied is characterized in that it is injected at a pressure of 25~100kg / c m2 from the injection nozzle with the <br/> check valve from the pressure medium supply unit A combined production device for asphalt mixture and foam door asphalt mixture. 3. During the production of the asphalt mixture,
The injection nozzle for injecting water or air is an injection nozzle with a check valve, and the air injected from the injection nozzle is 4k.
The combined production apparatus for an asphalt mixture and a foamed asphalt mixture according to claim 1, wherein the mixture is sprayed at a pressure of at least g / cm2. 4. Within a time period during which liquid asphalt injected into the asphalt supply pipe is discharged,
The combined production apparatus for asphalt mixture and foam door asphalt mixture according to claim 1 or 2, wherein the pressurized water from the injection nozzle is injected within one second from the start of asphalt injection.