JP4173084B2 - Asphalt injection pipe for asphalt plant - Google Patents

Description

  The present invention relates to an asphalt injection pipe installed in an asphalt plant for producing an asphalt mixture that is a road pavement material.

In recent years, demands for special asphalt mixtures having different properties from ordinary asphalt mixtures, such as drainage asphalt mixtures, are increasing, and accordingly, the opportunity to use special asphalt with strong tackiness is increasing. When this sticky asphalt is used, asphalt often adheres to the inner wall of the asphalt injection pipe, and when this asphalt grows, it is necessary to periodically remove the asphalt.

  4, the asphalt supply apparatus of the asphalt plant includes an asphalt metering tank 103 in the vicinity of the mixing tank 102 of the mixer 101, and an asphalt injection pipe 105 having a plurality of injection nozzles 104 above the mixing tank 102. The asphalt measured by the asphalt measuring tank 103 is sent to the asphalt injection pipe 105 by the supply pump 106, and the asphalt is injected from the injection nozzle 104 toward the entire area of the mixing tank 102.

  If asphalt with high adhesiveness is used, asphalt adheres to the inner wall of the asphalt injection pipe 105, and when it adheres to some extent, the asphalt injection pipe 105 is removed and the asphalt adhering to the pipe is removed.

  However, as mentioned above, removing asphalt adhering in the asphalt injection pipe requires considerable work time and is troublesome work, and the operation of the plant must be stopped during the work. A plan was desired.

  This invention makes it a subject to provide the asphalt injection pipe of an asphalt plant which can maintain an asphalt injection pipe easily in view of said point.

In order to solve the above-mentioned problems, an asphalt injection pipe of an asphalt plant according to claim 1 is provided with an injection pipe body having a plurality of injection nozzles disposed above a mixing tank of a mixer for mixing asphalt mixture , and the injection In the asphalt injection pipe of the asphalt plant in which the asphalt supplied through the pipe body is injected from the injection nozzle into the mixing tank, the asphalt injection pipe of the asphalt plant is slightly smaller in diameter than the injection pipe body , and one end is opened and the other end is closed. and the replacement pipe body formed by drilled hole to a position that matches the ejection nozzle position, is characterized in that mounted by inserting from the front end opening portion of the injection pipe body.

  The asphalt injection pipe of the asphalt plant according to claim 2 is characterized in that a heater for asphalt heat insulation is attached to the inside of the replacement pipe body.

According to the asphalt blowpipe asphalt plant according to claim 1, wherein according to the present invention, slightly smaller diameter than the blowpipe body with a plurality of injection nozzles, and closing the other end with one end open, and the injection nozzle Since the replacement tube made by drilling a through hole at a position that matches the position is inserted from the tip opening of the injection pipe body and attached, it is only necessary to replace the replacement tube even if asphalt adheres Well, it can cope in a short time and is easy to maintain.

  According to the asphalt injection pipe of the asphalt plant according to claim 2, since the heater for asphalt heat insulation is attached to the inside of the replacement pipe body, the asphalt can be easily maintained at an appropriate temperature, and can be replaced by heating at an appropriate temperature. Adhesion to the tube can be suppressed as much as possible.

According to the asphalt injection pipe according to claim 1, wherein according to the present invention, slightly smaller diameter than the blowpipe body with a plurality of injection nozzles, and closing the other end with one end open, and matches the injection nozzle position A replacement tube having a through-hole formed at a position to be inserted is inserted from the tip opening of the injection pipe body and attached. As a result, the asphalt to be supplied passes through the replacement pipe and is injected from the injection nozzle. Asphalt adheres to the inner wall of the replacement pipe, but the asphalt does not contact the inner wall of the injection pipe body . There is little adhesion.

In addition, even if asphalt adheres to the replacement tube, this replacement tube is simply a cylinder and is inexpensive, and can be removed and replaced with a new one. To do. Note that the replacement tube removed, for not adhered well as Heater on the side surface of the tube, it is possible to heat the tube side at the burner, remove the asphalt adhered by the heat easily be able to. It is possible to reuse the replacement pipe from which the asphalt has been removed, but if there is an extra replacement pipe, it will be easier to maintain if it is stored as a spare for the next replacement. It will be a thing.

In this way, if the replacement tube is inserted and installed in the injection pipe body , even if the asphalt adheres, the replacement tube is simply replaced, and the operation is completed in a short time. Maintenance is easy without stopping for a long time.

  According to the asphalt supply pipe of the mixer of the second aspect, the heater for asphalt heat insulation is attached inside the replacement pipe. As a result, the asphalt in the replacement pipe can be directly heated, so that it can be heated more uniformly and effectively than an external heater. Can be reduced as much as possible to extend the replacement life.

  Embodiments of the present invention will be described below with reference to FIGS.

FIG. 1 shows an asphalt supply apparatus mounted on a plant main body of an asphalt plant, which includes an asphalt metering tank 3 in the vicinity of a mixing tank 2 of a mixer 1 and a plurality of injection nozzles 4 at an upper level of the mixing tank 2. and the injection pipe body 5, are disposed asphalt injection pipes consisting of the replacement tube 10 for insertion into the injection pipe body 5.

The injection pipe body 5 communicates with the asphalt metering tank 3 by a supply pipe 6, and a predetermined amount of asphalt measured in the asphalt metering tank 3 is fed by a supply pump 7 for asphalt pressure feeding interposed in the middle of the supply pipe 6. Asphalt is jetted from the jet nozzle 4 into the mixing tank 2. The injection pipe body 5 is attached heater 8 for heating insulation, also is disposed extraction tube 9 for extracting the asphalt remaining in the injection pipe body 5.

The replacement pipe body 10 having one end opened and the other end closed as shown in FIG. 2 or 3 is inserted into the injection pipe body 5 so that it can be fixed with a bolt or the like. . The outer diameter of the replacement pipe 10 is slightly smaller in diameter than the inner diameter of the injection pipe body 5, inserting a replacement tube 10 into the injection pipe body 5, the inner wall surface of the injection pipe body 5 replacement tube 10 So that it does not come into contact with the asphalt supplied. In addition, the replacement tube 10 is provided with a through hole 11 at a position that matches the position of the injection nozzle 4 of the injection pipe body 5, and asphalt that flows into the replacement tube 10 passes through the through hole 11. It is made to inject toward the inside of the mixing tank 2 from the injection nozzle 4. FIG.

Reference numeral 12 denotes an asphalt heat insulation heater built in the interior of the replacement tube 10, and has a structure in which the periphery of the heater is covered with a protective tube 14 so that the asphalt and the heater body 13 are not in direct contact with each other. The asphalt supplied into the inside 10 is also heated from the inside, and it is structured to be able to efficiently heat and keep it together with the heating from the outer peripheral surface of the injection pipe body 5 by the external heater 8. It should be noted that the external heater 8 may be omitted or only the external heater 8 may be sufficient if a sufficient heat insulation effect can be obtained with only the heater 12 in the replacement tube 10. If there is a heat insulation effect, the heater 12 in the replacement tube 10 can be omitted. Reference numeral 15 denotes a handle used when the replacement tube 10 is inserted into or removed from the injection pipe body 5.

Thus, when the injection pipe body 5 having the above-described configuration is used, the asphalt supplied from the asphalt measuring tank 3 is injected from the injection nozzle 4 through the inside of the replacement pipe body 10 in the injection pipe body 5. At this time, asphalt adheres to the inner wall of the replacement pipe body 10, but the inner wall of the injection pipe body 5 is covered with the replacement pipe body 10, so that asphalt does not adhere. When the asphalt adheres to and clogs the replacement tube 10 due to long-term use, the bolts that fasten the replacement tube 10 are removed, the handle 15 is held, and as shown in FIG. Pull out with 12 and remove. Then, a new replacement tube 10 prepared separately is inserted and fastened with bolts, and the replacement operation is completed when the heater 12 is inserted and attached.

The replacement pipe 10 removed, to the side surface of the tube does not have well as Heater, it is possible to heat the tube side at the burner, be removed asphalt adhered by the heat easily It can be used again, and if there is an extra replacement tube, it is good to store it as a spare for the next replacement.

Thus, the asphalt injection pipes of the present invention, to insert the replacement tube 10 into the injection pipe body 5, asphalt so as to adhere solely to the replacement tube 10, the replacement pipe be advanced adhesion This is performed quickly by exchanging the body 10, so that it is not necessary to stop the plant for a long time, and the asphalt removal work of the removed replacement pipe body 10 is simple, which is very easy in terms of maintenance.

  Moreover, when the heater 12 for asphalt heat insulation is attached to the inside of the replacement pipe body 10, the asphalt in the replacement pipe body 10 can be directly heated, and can be heated more uniformly and effectively than the external heater 8, and the asphalt Can be easily maintained at an appropriate temperature, and by the heating at an appropriate temperature, the adhesion to the replacement tube can be suppressed as much as possible to extend the replacement life.

It is explanatory drawing which shows one Example of the asphalt injection pipe of the asphalt plant which concerns on this invention. It is the principal part enlarged view which abbreviate | omitted a part of FIG. 1, and is the figure which showed a mode that the tubular body for replacement | exchange was taken out. It is AA sectional drawing of FIG. It is a figure explaining the conventional asphalt injection pipe.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Mixer 2 ... Mixing tank 4 ... Injection nozzle 5 ... Injection pipe main body 10 ... Replacement pipe 11 ... Through-hole 12 ... Heater

Claims (2)

An injection pipe body having a plurality of injection nozzles is disposed above the mixing tank of the mixing mixer for asphalt mixture , and asphalt supplied through the injection pipe body is injected from the injection nozzle into the mixing tank. in asphalt blowpipe asphalt plant, and blowpipe slightly smaller diameter than the body, to close the other end with one end open, and the injection nozzle replacement tube made by drilled hole to a position that matches the position An asphalt injection pipe for an asphalt plant, wherein the body is inserted and attached from the tip opening of the injection pipe body .   The asphalt injection pipe for an asphalt plant according to claim 1, wherein a heater for asphalt heat insulation is attached to the inside of the replacement pipe body.

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