JP2568981B2 - Tank truck for asphalt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tank lorry for liquid asphalt.

[0002]

2. Description of the Related Art A conventional asphalt tank lorry requires that a hot air pipe be provided in a tank so that the asphalt in a tank mounted on an automobile does not harden, and that the temperature be maintained at about 200 ° C. to about 250 ° C. And
As shown in FIG. 3, a pump 6 for transporting asphalt, which is called an external pump, is provided outside the tank 3, and a bottom valve 21 provided at the bottom of the tank 3 is provided on a tank lorry for storing and transporting asphalt into and out of the tank. There is a tank lorry that communicates with the pump 6 through the transfer passage 7 and sucks the asphalt from the discharge port 22 into the tank 3 by the driving force of the pump 6 and carries out the asphalt by the discharge / suction switching valve 10. In addition, a tank lorry that increases the internal pressure of the pressure-resistant tank 3 containing asphalt by a compressor 23 or by introducing engine exhaust (not shown), and only discharging the asphalt from the discharge port 22 of the transport passage 7 is called a pressure feed type. is there.

[0003]

However, the tank lorry with an external pump requires an additional heating / heating device so that the pump and piping are cooled by the outside air and the asphalt does not harden inside. In particular, in recent years, liquid asphalt, which has a higher temperature than conventional ones, has been frequently conveyed, and the temperature difference between the inside and outside of the tank has increased, making it easier to cure. In addition, the pressure-feeding tank lorry has a pain in the pressure-resistant tank quickly, and there is a risk that hot liquid asphalt may be scattered in the event that the tank is cracked.

[0004]

According to the present invention, there is provided an asphalt tank lorry in which a hot air pipe for exhausting a heater for keeping liquid asphalt warm is disposed inside a tank mounted on an automobile in order to solve the above-mentioned problems. Asfu
In Aruto for tank trucks, in the vicinity of the hot air pipe
The pump for discharging the liquid asphalt itself provided, dissipate one end open to the interior of the tank, in the middle of the other end of the liquid asphalt for conveying passage is opened to the outside of the tank,吐吸switching valve is communicated to the pump it was connected
By the pump and the exhalation switching valve, the hot air pipe of the heater and
It is heated by the heat storage of the liquid asphalt of the cargo .

[0005]

[Function] The asphalt tank lorry according to the above configuration is a liquid asphalt separate from the hot air pipe for keeping heat.
Pump and a discharge / suction switching valve are installed in the tank.
Since girder, that the use and the pump body and piping heat accumulation asphalt hot air pipe and cargo heater for heating and insulation
This eliminates the need for a conventional heating / warming device, simplifies the structure of the piping valve, and allows safe and quick work without leaking out of the tank even if there is leakage from a pump or the like.

[0006]

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 is an explanatory view of a tank as viewed from a side of a tank truck for asphalt, and FIG. 2 is an explanatory view in a plane. Reference numeral 1 denotes an asphalt tank lorry vehicle, and its loading platform 2 has a tank 3 mounted thereon. A hot air pipe 4 is piped in the front and rear direction below the inside of the tank 3, and a rear end 4 b thereof is opened below the rear end plate of the tank 3.
It is connected to a burner 5 provided at the rear end of the bed. The front end 4 f of the hot air tube 4 opens above the front end plate of the tank 3 to exhaust the burner 5. The hot air pipe 4 of the hot air supply system may be piped in a U-shape inside the tank 3, and the front end 4f may be attached to the rear end plate of the tank 3 in the same manner as the rear end 4b. Liquid asphalt is placed near the hot air tube 4 separately from the hot air supply system so that the hot air from the hot air tube 4 is conducted among the heaters including the hot air tube 4 and the burner 5.
A pump 6 for discharging is provided. A transport passage 7 is provided substantially parallel to the hot air pipe 4, and one end 8 thereof is opened to the inside of the tank. One end 8 is a front suction port 8 located in front of the tank.
f and a rear suction port 8b located rearward.
When inhaling liquid asphalt, it is possible to efficiently inhale from the bottom surface of the tank 3. Also, the transport path 7
The other end 9 is attached to the upper part of the rear end plate of the tank 3 and is opened to the outside as a discharge port. Reference numeral 10 denotes a discharge / suction switching valve which is connected to the pump 6 and is provided in the middle of the transport passage 7 to switch the communication to one end 8 or the other end 9. Valve operating handle 1 for switching exhalation / suction switching valve 10
1 is attached to the upper part of the tank 3. Reference numeral 12 denotes a manhole for injection.

A pump 6 is provided in the vicinity of a hot air pipe 4 of a heater for keeping liquid asphalt housed in a tank 3 mounted on an automobile 1, and one end 8 is opened into the tank 3 and the other end 9 is opened. Is connected to a transfer passage 7 which is opened to the outside of the tank, and a discharge / suction switching valve 10 connected to the pump 6.
The operation of the asphalt tank lorry provided with is described. When the liquid asphalt is taken into the tank 3, the valve operating handle 11 is operated, and
Is switched from the other end 9 to one end 8 of the transport passage 7 so that the pump 6 can suck the air, and the pump 6 is driven by a propeller shaft from the engine to perform the suction. Conversely, when discharging the liquid asphalt from the tank 3, the valve operating handle 11 is operated to switch the discharge / suction switching valve 10 from one end 8 to the other end 9 of the transport passage 7 so that the pump 6 can discharge the asphalt. At the end of the discharge, the liquid asphalt remaining in the transport passage 7 is sucked, and clogging can be prevented. At this time, the hot air pipe 4 is disposed in the vicinity of the pump 6 and the transport passage 7, and the pump 6 is indirectly heated by the liquid asphalt heated by the hot air pipe 4.
And since the transport path 7 is temperature-maintaining heating, liquid asphalt <br/> belt liquid A <br/> asphalt remaining within the conveying path 7 that is cured during the discharge, inhalation and over time due to movement of the tank truck No longer cures.

[0008]

The present invention according to the present invention, as described above, the asphalt for tank truck, since Pont <br/> flops and吐吸switching valve for discharging the liquid asphalt is disposed in the tank, the liquid asphalt in the transfer passage Because it does not cure and uses the heat storage of the hot air pipe of the heater and the liquid asphalt of the cargo, the conventional heating and warming device for the pump body and piping is unnecessary, and the structure of the piping valve outside the tank can be simplified and the pump can be simplified. Even if liquid asphalt leaks from the tank, etc., it can be safely and quickly performed without flowing out of the tank.

[Brief description of the drawings]

FIG. 1 is a side view of an asphalt tank truck according to the present invention.

FIG. 2 is a plan view of an asphalt tank truck according to the present invention.

FIG. 3 is a side view of a conventional asphalt tank truck.

FIG. 4 is a side view of a conventional asphalt tank lorry.

[Explanation of symbols]

1 ··· Automobile, 3 ·· Tank, 4 ·· Hot air pipe, 6 ·· Pump, 7 ·· Transport path, 8 ·· One end, 9 ··· Other end, 10
..Suction / suction switching valves.

Claims (1)

(57) [Claims] Inside of 1. A tank mounted on an automobile, the liquid
In an asphalt tank lorry in which a hot air pipe for exhausting a heater for keeping the asphalt warm is provided, a pump for discharging liquid asphalt itself is provided near the hot air pipe, and one end is opened to the inside of the tank. And liquid asphalt having the other end opened to the outside of the tank.
In the middle of preparative conveying path, by connecting the吐吸switching valve is communicated to the pump, the pump and吐吸switching valve arsenide
Heat from the hot air pipes of the heater and liquid asphalt
A tank lorry for asphalt characterized by heating .