JPH03287903A - Cooler for asphalt-paved face - Google Patents

Abstract

PURPOSE:To raise the cooling effect of paved face by a method in which air holes directed downwards over the width of a vehicular body are provided, and water-spreading jet nozzles directed downwards are arranged before and behind the advancing direction of the vehicular body with the interposition of the air holes. CONSTITUTION:Two water supply pipes 15 and 15' are set on both sides of an air pipe 14, water-spreading jet nozzles 16 are provided to the pipes 15 and 15', and a cooling part 3 consisting of the nozzles 16 and an air hole 13 is formed. An air blower and a water pump 23 are actuated to jet water from the nozzles 16 and also to blow air from the nozzle 13, and the vehicular body 2 is moved at a desired speed to cool asphalt-paved face. Water is spread and jet only from the front nozzles 16 in the advancing direction, and the supply of water to the rear nozzles 16 is stopped. The water on the road is blown away by the air pressure immediately thereafter for cooling. The paved face can thus be effectively cooled.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an asphalt pavement surface cooling device that can cool the paved asphalt in a short time when paving a road with asphalt. In particular, it uses a combination of water and air for cooling, and it can be adjusted according to the direction of travel of the cooling device, and unnecessary water does not remain on the top surface of the asphalt, and after cooling, further asphalt pavement can be added immediately on top of it. It is designed so that it can be done.

<Conventional technology> Generally, asphalt pavement surfaces deteriorate over time and become deformed due to ruts, so there are situations where it is necessary to dig up again and re-pave after a certain period of time has passed after construction. do.

However, since this type of construction involves constructing the surface of the road, even if construction were carried out one lane at a time, it would create a problem for vehicle traffic and cause traffic congestion, which would become a social problem. ing.

Therefore, in order to solve this problem, it is necessary to shorten the time from when the asphalt is paved until it can be used for traffic, but in order to do this, it is necessary to increase the compaction of the asphalt and at the same time forcefully pave it. It is said that it is better to lower the temperature of asphalt, and this has been made clear from past research and experience. Asphalt was originally 14
The temperature is around 0℃, and the temperature reaches 90℃ when the compaction work is completed.
℃ to 100℃, but further at least 40℃
Unless the temperature is lowered to below 0.3°C, it cannot be said to be the desired opening temperature for traffic; if the temperature is higher than that, so-called initial ruts will occur due to vehicles passing through the temperature.

Therefore, in order to lower the temperature in this way, if we relied on the natural atmospheric temperature, it would take several hours, depending on the temperature. Therefore, in order to actively cool the asphalt pavement surface, there are devices in which a water sprinkler and a blower are mounted on a compaction vehicle to perform cooling while performing compaction work (see Japanese Patent Application Laid-Open No. 2-8402). A device has been proposed (see Japanese Patent Laid-Open No. 2-49804) in which a water sprinkler and a blower are mounted on a vehicle that does not have a compaction function, and cooling is performed after completion of compaction work. These devices were found to be significantly more effective than natural cooling.

<Problems to be solved by the invention> In a vehicle that does not have a compaction function and is equipped with a cooling device, it is possible to shorten the cooling time by repeatedly reciprocating the paved surface. However, no consideration was given to the method of blowing water and air onto the road surface.
The idea is simply to spray water and air onto the road surface. In other words, unless the air is blown away immediately after water is sprayed onto the road surface, a thin film of water will form on the asphalt pavement, which will isolate it from the outside air and prevent the temperature of the asphalt layer from decreasing. In addition, since cooling is usually performed by moving the cooling device back and forth on a certain road,
It is necessary to adjust the order of water spray and air blowing depending on the direction of movement of the cooling device. That is, by blowing air after water spraying, the vaporization of water is promoted, which brings about a decrease in temperature, but conventional systems do not take this order of cooling operations into consideration.

<Means for Solving the Problems> Therefore, in order to solve the above-mentioned problems, the asphalt pavement surface cooling device according to the present invention is provided with a plurality of ventilation holes facing downward in the width direction of the vehicle, and Arranging water spray nozzles facing forward and downward in the direction of travel of the vehicle across this ventilation hole, detecting the direction of travel of the vehicle, and causing water to come out from the row of water spray nozzles on the front side in the direction of travel of the vehicle, This enables effective cooling of the asphalt road surface and prevents unnecessary water from remaining on the upper surface of the asphalt after cooling.

<Embodiment> Next, an embodiment of the asphalt pavement surface cooling device according to the present invention will be described based on the drawings. l is the asphalt pavement surface cooling device main body according to the present invention, and the rear part of an arbitrary vehicle 2, The cooling mechanism 3 is provided in the middle part or the front part (in this embodiment, the rear part). The vehicle 2 may be self-propelled or towed, and may or may not have a rolling function.

In the figure, 4 is a frame disposed at the rear of the vehicle 2, and a hydraulic cylinder 5 is suspended from the frame 4 in the width direction of the vehicle. This hydraulic cylinder 5 is of a double-acting type, and therefore its piston rod 6 is movable in either left or right direction. Reference numeral 7 denotes a gate-shaped lateral movement frame connected to the piston rod 6 of the hydraulic cylinder 5, and two rails 8 are fixedly disposed inside the lateral movement frame 7 so as to face each other. be. Further, a hydraulic motor 10 having a sprocket 9 attached thereto is arranged between the two rails 8. 9° is another sprocket corresponding to the sprocket 9, and both sprockets 9° and 9° are connected by a chain 11. A cooling component lower arm 12 is slidably engaged with each of the two rails 8 in the vehicle width direction, and a plurality of ventilation holes 13 are formed on the lower surface of the cooling component lower arm 12. A hollow ventilation vibrator 14 is provided. There are two water pipes 15 and 15 degrees on both sides of the front and rear of the blower vibrator 14.
A plurality of water spray nozzles 16 are arranged on this water pipe 15, 15'. The water spray nozzle 16 and the air blowing hole 13 constitute an asphalt pavement cooling section. Further, the cooling component lower arm 12 is connected to the chain 11 by a connecting member 17, and as the chain 11 rotates, the cooling component lower arm 12 slides along the rail 8 in the vehicle width direction. The cooling component lower arms 12 are configured to move simultaneously in opposite directions and to be widened or retracted. Further, in the above embodiment, two cooling units for asphalt pavement surfaces are installed in parallel, but two or more cooling units can also be installed in parallel. In addition, 18 is a hydraulic pump,
The hydraulic cylinder 5 and the hydraulic motor 10 are connected to each other by a hydraulic vibrator 19, thereby supplying oil. 20 again
is the water tank 22 of the vehicle 2 (see Figure 7) and the water supply vibrator 1.
5 and 15 degrees, and 21 is a water supply tube that is installed in the vehicle 2 and connected to the ventilation floor (not shown) and the ventilation vibrator 14.
This is the ventilation tube that connects the The water supply tube 20 and the air supply tube 21 are made of flexible members so as to be able to accommodate movement of the cooling section in the vehicle width direction (see FIGS. 1 to 4 and 8 for the above).

In addition, in the above embodiment, there are two cooling parts for the asphalt pavement surface.
Although we have shown an example in which they are installed side by side, if widening is not required, you can simply arrange the water blower vibrator 15, 15° with 16 rows of water spray nozzles on both sides of the blower vibrator 14 in which the blower hole 13 is formed. Bye.

5 and 6 show another embodiment, and the difference from the above embodiment is that two hydraulic cylinders 5° are used instead of the chain 11 to move the cooling section laterally. This is the point of using it. That is, in each figure, the lateral movement frame 7° is a lateral movement frame fixed to the rear of the vehicle 2, and the lateral movement frame 7° is 2 degrees in the vehicle width direction.
The main hydraulic cylinder is arranged at 5°. This hydraulic cylinder 5° is also of a double-acting type, so its piston rod 6° can move in either left or right direction. Cooling component lower arms 12 similar to those described above are suspended from and fixed to the piston rods 6 degrees of the hydraulic cylinders 5', and each cooling component lower arm 12 is designed to be widened or housed independently. . Further, on the lower surface of the cooling component lower arm '12, there are a ventilation vibrator 14 and a water supply vibrator 15.
15 degrees, which is the same as in the previous embodiment. 18° is a hydraulic pump, hydraulic cylinder 5°
A hydraulic vibrator 19 is used to supply oil.

FIG. 7 shows a mechanism for switching water supply to two water supply vibrators 15 and 15' that are connected to the water spray nozzle 16, and 22 is a water tank that can be provided at any location in the vehicle 2. Yes, water supply vibration 15, 15° by water supply pump 23
Water is sent to 24 is a switching valve, and the water supply to the two water supply vibrators 15, 15° is switched by a signal from a forward/reverse switching lever 25. Note that this device is not necessary when manually adjusting the water supply to the water supply vibrator 15, 15°. However, if such a device is installed, the water spray nozzle 1 can be adjusted depending on the direction of travel of the vehicle 2.
6 can be changed freely, which is very convenient. Incidentally, when the forward/reverse switching lever 25 is in the neutral state, water is not supplied to any of the water supply vibrators 15, 15'.

Fig. 8 shows an example in which the vehicle 2 is equipped with various measuring instruments in order to know the cooling state of the asphalt pavement surface, and a and b are the surfaces for detecting the temperature of the road surface near the cooling section. A thermometer, C is a radiant heat needle, d is an outside temperature gauge, and e is a distance meter. Measurement data from these measuring instruments is input to the computer f and processed.

<Function> The asphalt pavement cooling device 1 is run on the asphalt pavement surface on which the compaction work has been completed to cool the asphalt cooling surface.

First, let's talk about the action of the hydraulic cylinder 5.
This hydraulic cylinder 5 has a cooling unit suspension arm 12. This is to move the entire lateral movement frame 7 on which the air blower vibrator 14, the water feeder vibrator 15, etc. are arranged, in the width direction of the vehicle, and is effective in preventing the vehicle 2 from running and damaging the surface during work. be. Therefore, first, the hydraulic pump 18 is started, and the piston rod 6 of the hydraulic cylinder 5 is moved by the oil sent via the hydraulic vibrator 19.
Move the lateral movement frame 7 to either the left or right in the vehicle width direction to adjust the position of the cooling section.

Next, the air blower vibrator 14 and the water blower vibrator 15. Water supply vibe 1
To explain the action of 5', the hydraulic pump 18 is started and oil is sent to the hydraulic motor 10.
Rotate. When the hydraulic motor 10 rotates, the sprockets 9 and 9 degrees rotate, and the chain 11 rotates. When the chain 11 rotates, the connecting member 17 moves together with the chain 11, so that the cooling component lower arms 12 move while slidingly contacting the rails 8, and each cooling component lower arm 12 simultaneously moves in opposite directions. Then, the cooling component lower arm 12 is expanded to fit the width that requires cooling. In this case, the part where the two cooling component lower arms 12 overlap is
One of the valves 26 in the overlapping area is closed so that water comes out from one of the water spray nozzles 16 in the overlapping area. Then, the air blower and water pump 2
3 is activated, water is sprayed from the water spray nozzle 16, wind is blown from the air blowing nozzle 13, and the vehicle 2 is moved at a desired speed to cool the asphalt paved surface. Usually 1
Since the temperature of the asphalt pavement surface does not drop to the desired temperature during the cooling process, the area to be cooled is reciprocated multiple times to perform the cooling process. At this time, at the beginning of the cooling process, the temperature of the asphalt has not yet decreased and may not have settled down yet, so when vehicle 2 reciprocates on the same trajectory, the ground pressure of vehicle 2 hardens the road surface and forms ruts. There is a risk of

Therefore, in order to prevent the vehicle 2 from passing through the same place, the piston rod 6 of the hydraulic cylinder 5 is moved, and the position of the lateral movement frame 7 relative to the vehicle 2 is shifted. Change the passing location on the road surface.

Next, the operation of the embodiment shown in FIGS. 5 and 6 will be explained. Start the hydraulic pump 18 and send oil to the hydraulic cylinder 5°. Since the position of the piston rod 6° of each of the two hydraulic cylinders 5° arranged in parallel can be changed individually, move each piston rod 6° to adjust the position of each cooling component lower arm 12 to achieve the desired width. I will make it happen.

In addition, in the case of this embodiment, the two hydraulic cylinders 5° can be moved independently, so by adjusting the 5° of each hydraulic cylinder, the width of the cooling section can be made the same. However, the position relative to the vehicle 2 can be changed.

In addition, as mentioned above, the water supply vibrator 15. Water supply vibe 15
° are arranged in two rows, but the water spray is performed only by the water spray nozzle 16 at the front in the direction of travel of the vehicle 2, and water is supplied from the rear water spray nozzle 16 so as not to spray water. Stop. This is because it is efficient to cool the water sprayed onto the road surface by blowing it off immediately afterward using wind pressure, and also to prevent unnecessary water from accumulating on the road surface. Equipped with equipment,
This switching of the water spray nozzle 16 can be performed automatically. That is, a signal that detects the position of the forward/reverse switching lever 25 is input to the switching valve 24, and water is sent only to the water spray nozzle 16 on the forward side. The sprayed water is blown away by the air, which prevents water from remaining on the asphalt road surface, and allows you to immediately lay asphalt on top of it, making it possible to create two or three layers of asphalt pavement. This can be done immediately after the cooling of the lower layer is completed.

The cooling state of the asphalt pavement surface is measured using surface thermometers a and b, and the amount of water sprinkled is adjusted. If the outside air temperature is high and adjusting the amount of watering is insufficient, the speed of the vehicle 2 is slowed down. Then, once the asphalt pavement surface has cooled to the desired temperature, the cooling operation can be completed.

In addition, the cooling part is movable in the vertical direction, and the water spray nozzle 1
It may be convenient to be able to change the heights of the air vents 6 and the air vents 13 relative to the road surface. For example, if water remains on the road surface, asphalt cannot be layered to pave it, so the air vents 13 can be lowered close to the road surface to blow away the water. , the cooling part can be raised so that it does not come into contact with the circuit surface.

<Effects of the Invention> As described above, according to the asphalt pavement surface cooling device according to the present invention, a plurality of ventilation holes are provided in the width direction of the vehicle and are directed downward, and the vehicle is prevented from moving across the ventilation holes. Water spray nozzles are arranged at the front and rear of the vehicle and facing downward to detect the direction of travel of the vehicle, and water comes out from the row of water spray nozzles on the front side in the direction of travel of the vehicle, so water and air can be used together. The asphalt road surface can be effectively cooled, water can be blown off with air immediately after being injected onto the asphalt road surface, and unnecessary water can be prevented from accumulating on the asphalt upper surface.

[Brief explanation of the drawing]

The drawings show an embodiment of the asphalt pavement cooling device according to the present invention, and FIG. 1 is a side view of the cooling mechanism, and FIG. 2 is a plan view showing the cooling section widening mechanism.
A) shows the closed state, (B) shows the expanded state, Fig. 3 is a bottom view of the cooling section, Fig. 4 is a plan view showing the lateral movement mechanism, and (A) shows the neutral state. State, (B), (C
5 is a side view showing the other side of the cooling mechanism, and FIG. 6 is a plan view showing the widening mechanism of the cooling section in FIG. 5. (A) (B) shows the closed state, (B) shows the expanded state, FIG. 7 is an explanatory diagram showing the switching mechanism of the water spray device, and FIG. 8 is a side view of the present invention with various measuring instruments attached. . 1... Asphalt pavement cooling device body 2... Vehicle 3... Cooling section 4... Frame 5.5°... Hydraulic cylinder 6.6゛... Piston rod 7.7゛... - Lateral movement frame 8...Rail 9.9゛...Sprocket 10...Hydraulic motor 11...Chain 12...Cooling unit suspension arm 3...Blower hole 4...Blower vibe 5.15'...Water feed vibro...Water spray nozzle 7...Connection member 8.18°...Hydraulic pump 9...Hydraulic vibrator O...Water feed tube...Blower tube 2... Water tank 3...Water pump 4...Switching valve 5...Forward/backward switching lever 6...Valves a, b...Surface thermometer C...Radiant heat needle d...Outside air temperature gauge e ...Distance meter

Claims (1)

[Scope of Claims] 1. A plurality of ventilation holes are provided in the width direction of the vehicle and directed downward, and water spray nozzles are arranged across the ventilation holes in front and rear of the traveling direction of the vehicle and directed downward. An asphalt pavement surface cooling device characterized by: 2. The asphalt pavement surface cooling device according to claim 1, wherein the asphalt pavement surface cooling device detects the traveling direction of the vehicle and causes water to come out from a row of water spray nozzles on the front side in the traveling direction of the vehicle.