JPH03287902A - Cooler for asphalt-paved face - Google Patents

Abstract

PURPOSE:To raise the efficiency of cooling operation by a method in which an asphalt-paved face cooler consisting of a water-spreading jet nozzle and an air hole is set movably in the direction of and on a vehicular body. CONSTITUTION:A hydraulic pump 18 is operated, oil is supplied to a hydraulic motor 10 to turn the motor 10, sprockets 9 and 9' are turned, and a connector 17 is moved with a chain 11 to move the hanging arm 12 of cooling part while slide-contacting the arm 12 with a rail 8. The arm 12 is moved to the opposite direction concurrently and expanded to a width necessary for cooling. Water is then discharged from one water-spreading jet nozzle 16 of the lapped part, and air is blown out from an air nozzle 13 to cool the paved face. The efficiency of operation can thus be raised by moving the cooler, widening the width, and cooling it over the width more than the vehicular width.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to an asphalt pavement surface cooling device that is capable of cooling the paved asphalt in a short time when paving a road with asphalt. In particular, the cooling width can be adjusted arbitrarily depending on the road width.

<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 the construction were done one lane at a time, it would cause problems for vehicular traffic and cause traffic congestion, which has become a social problem. .

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 traffic opening temperature; if the temperature is higher than that, a so-called initial edge 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 the compaction work. These devices are recognized to be significantly more effective than natural cooling, and are particularly effective in the case of vehicles that do not have a compaction function. It has been found that the cooling time can be significantly shortened and the cooling operation can be carried out without damaging the surface.

<Problem to be solved by the invention> However, if such a cooling device is installed in a vehicle, the maximum width of the vehicle is limited to about 2 m, so the width that can be cooled to -degrees will inevitably be about 2 m. limited. However, the width of the road is usually wider than 2 m, and if cooling is performed with a width of 2 m, the cooling work cannot be completed in a short time.

Furthermore, in order to cool the same paved surface to a desired temperature, it is necessary to cool the same paved surface by making multiple trips back and forth. However, even if a vehicle does not have a compaction function, cooling the same paved surface repeatedly can damage the surface, so to prevent this, vehicles should not pass over the same place. It is desirable to do so.

<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 includes an asphalt pavement surface cooling section constituted by a water spray nozzle and an air hole in a vehicle. A plurality of cooling units are arranged so as to be movable in the vehicle width direction, and a plurality of the cooling units are arranged in parallel in the longitudinal direction of the vehicle, each of which is movable in the vehicle width direction, and two cooling units arranged in parallel can be moved in the same direction at the same time. By moving the cooling section and widening it, it is possible to simultaneously cool an area wider than the vehicle width according to the road width, improving cooling efficiency.
In addition, by moving the entire cooling section at the same time, the support position of the vehicle relative to the cooling section can be changed without widening it, and the passing position of the vehicle can be changed even if cooling work is performed multiple times by reciprocating the same road surface. This is what I did.

<Embodiment> Next, an embodiment of the asphalt pavement surface cooling device according to the present invention will be described based on the drawings. 1 is the asphalt pavement surface cooling device main body according to the present invention; A cooler 13 is provided in the middle or 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 disposed 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. On the two rails 8, cooling unit suspension arms 12 are respectively slid in the vehicle width direction. A hollow ventilation vibrator 14, which is movably engaged and has a plurality of ventilation holes 13 formed in the lower surface thereof, is disposed on the lower surface of the cooling unit suspension arm 12. Two water supply vibrators 15, 15° on both front and rear sides
A plurality of water spray nozzles 16 are arranged on this water supply vibrator 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 three or more cooling units can also be installed.

Note that 18 is a hydraulic pump, which is connected to the hydraulic cylinder 5 and the hydraulic motor 10 through hydraulic vibrators 19, thereby supplying oil. 20 is the water tank 22 of vehicle 2.
(See FIG. 7) is a water supply tube that connects the water supply vibrator 15.15°, and 21 is a ventilation tube that is installed in the vehicle 2 and connects the ventilation floor (not shown) and the ventilation vibrator 14.

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).

Figures 5 and 6 show another embodiment, which differs from the previous embodiment in 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 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 and fixed to the piston rods 6'' of the hydraulic cylinders 5'', and each of the cooling component lower arms 12 is designed to be widened or housed independently. . Further, on the lower surface of the cooling component lower arm 12, an air blower vibrator 14 and a water feeder vibrator 15.degree. Reference numeral 18 is a hydraulic pump, which supplies oil to the hydraulic cylinder 5° by means of a hydraulic vibrator 19.

FIG. 7 shows a mechanism for switching water supply to two water supply vibrators 15 and 15 degrees connected to the water spray nozzle 16, and 22 is a water tank located at an arbitrary location in the vehicle 2. The water supply vibrator 15, 15 is operated by the water supply pump 23.
Send water 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.

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 component lower arm 12. This is to move the entire lateral movement frame 7 on which the air blower vibrator 14, water feeder vibrator 15, etc. are arranged, in the vehicle width direction, and to prevent the vehicle 2 from running on the same trajectory during work and damaging the surface. It is effective for Therefore, first, the hydraulic pump 18 is started, and the oil sent via the hydraulic vibrator 19 is used to move the piston rod 6 of the hydraulic cylinder 5.
, and 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, it starts the hydraulic bomb 18 and sends oil 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. The hydraulic pump 18 is started to 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, two hydraulic cylinders 5'
can be moved individually, and therefore, by adjusting the respective hydraulic cylinders 5', the position relative to the vehicle 2 can be changed even if the width of the cooling section is the same.

In addition, as mentioned above, the water supply vibrator 15. Water supply vibe 15
are arranged in two rows, but water is sprayed 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 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, the asphalt pavement surface cooling section constituted by the water spray nozzle and the ventilation hole is disposed in the vehicle so as to be movable in the vehicle width direction. In addition, the cooling section is arranged in two directions in the longitudinal direction of the vehicle.
They are installed side by side, each movable in the vehicle width direction, and two cooling units installed side by side can be moved in the same direction at the same time, so by moving and widening the cooling units, it is possible to extend the width beyond the vehicle width. It is now possible to simultaneously cool the road according to the width of the road, improving cooling work efficiency.Also, by moving the entire cooling section at the same time, the support position of the vehicle relative to the cooling section can be changed without widening the road. Even if the cooling operation is performed multiple times by reciprocating the same road surface, the passing position of the vehicle can be changed, which has the effect of preventing the occurrence of ruts.

[Brief Description of the Drawings] The drawings show an embodiment of the asphalt pavement cooling device according to the present invention, and FIG. 1 shows a side view of the cooling mechanism, and FIG. 2 shows the cooling section widening mechanism. It is a plan view (
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 another example of the cooling mechanism, and FIG. 6 is a plan view showing the cooling section widening mechanism shown in FIG. 5. (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 O...Hydraulic motor...Chain 2...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 0...Water feed tube...Blower tube 2...Water Tank 3...Water pump 4...Switching valve 5...Forward/backward switching lever 6...Pulp a, b...Surface thermometer C...Radiant heat needle d...Outside air temperature gauge e. ...Distance meter f...Computer

Claims (1)

[Scope of Claims] 1. An asphalt pavement surface cooling device, characterized in that an asphalt pavement surface cooling unit configured with a water spray nozzle and an air vent is disposed in a vehicle so as to be movable in the width direction of the vehicle. 2. The asphalt pavement cooling device according to claim 1, wherein a plurality of asphalt pavement cooling units are arranged in parallel in the longitudinal direction of the vehicle, and each of them is movable in the vehicle width direction. 3. The asphalt pavement cooling device according to claim 2, wherein the plurality of asphalt pavement cooling units arranged in parallel are movable in the same direction at the same time.