JP2860813B2 - Asphalt pavement surface cooling device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION <Field of Industrial Application> The present invention relates to an asphalt pavement surface cooling device capable of cooling a paved asphalt in a short time when asphalt paving a road. In particular, the cooling width can be arbitrarily adjusted according to the road width.

<Conventional technology> Generally, asphalt pavement surfaces have to be excavated and re-paved after a certain period of time after construction, because asphalt deteriorates over time and deforms due to ruts. I do.

However, since this type of construction works on the surface of the road, even if construction is performed one lane at a time, it will cause problems in vehicle traffic and cause traffic congestion, which is a social problem. .

Therefore, in order to solve this problem, it is only necessary to shorten the time from when the asphalt is laid to when it is used for transportation. It is advisable to lower the temperature of asphalt, which has been clarified by past studies and experiences. Asphalt originally 14
It has a temperature of about 0 ° C and 90 ° C when the rolling work is completed
However, if it is not lowered to at least 40 ° C, it is not a desirable traffic opening temperature, and if it is higher than that, vehicles passing there will cause so-called initial ruts. .

Therefore, in order to lower the temperature in this way, it takes several hours to expect the natural atmospheric temperature, regardless of the temperature. Therefore, in order to actively cool the asphalt pavement surface, a water spraying device and a blowing device are mounted on a compacted vehicle, and cooling is performed while performing compaction work (see JP-A-2-8402). There has been proposed an apparatus in which a water sprinkler and a blower are mounted on a vehicle having no rolling function and cooling is performed after the rolling operation is completed (see Japanese Patent Application Laid-Open No. 2-49804). These devices have been found to have a remarkable effect compared to natural cooling, and especially in the case of vehicles that do not have a rolling compaction function, cooling work can be performed without initial ruts even if the vehicle repeatedly reciprocates on the same pavement surface. It has been found that the cooling time can be greatly reduced and the cooling operation can be performed without damaging the surface.

<Problems to be solved by the invention> However, when installing such a cooling device in a vehicle, the width of the vehicle is limited to a maximum of about 2 m, so the width that can be cooled at a time is necessarily limited to about 2 m. Is done. 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 operation cannot be completed in a short time.

In order to cool to the desired temperature, it is necessary to reciprocate a plurality of times to cool the same pavement surface. However, even if the vehicle does not have a compaction function, the surface may be damaged when the same pavement surface is repeatedly cooled, and in order to prevent this, the vehicle does not pass through 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 disposes an asphalt pavement surface cooling unit including a water spray nozzle and a ventilation hole to a vehicle. The cooling unit is disposed in a laterally movable frame provided in a laterally movable manner, and further disposed in the laterally movable frame so as to be laterally movable in the vehicle width direction. Then, each of them can be moved in the vehicle width direction, and two cooling units arranged side by side can be moved in the same direction at the same time. Cooling at the same time to improve the efficiency of the cooling operation, and by moving the entire cooling unit at the same time, the supporting position of the vehicle with respect to the cooling unit without changing the width can be changed. Even if the cooling operation is performed a plurality of times by reciprocating on the road surface, the passing position of the vehicle can be changed.

<Embodiment> Next, an embodiment of an asphalt pavement surface cooling device according to the present invention will be described with reference to the drawings. Reference numeral 1 denotes an asphalt pavement surface cooling device main body according to the present invention. Middle or front (rear in this embodiment)
And a cooling mechanism 3. The vehicle 2 may be a self-propelled type or a towed type, and may or may not have a rolling function.

In the drawing, reference numeral 4 denotes a frame disposed at the rear of the vehicle 2 and a hydraulic cylinder 5 is suspended from the frame 4 in the vehicle width direction. The hydraulic cylinder 5 is of a double-acting type, so that its piston rod 6 can move in either direction. 7 is the hydraulic cylinder 5
This is a gate-type lateral movement frame connected to the piston rod 6 of the first embodiment. Two rails 8 are fixed to the lateral movement frame 7 so as to face the inside thereof. Also 2
A hydraulic motor 10 having a sprocket 9 attached thereto is disposed in the middle of the rail 8. Reference numeral 9 'denotes another sprocket corresponding to the sprocket 9, and both sprockets 9, 9' are connected by a chain 11. A cooling unit suspension arm 12 is engaged with each of the two rails 8 so as to be slidable in the vehicle width direction, and a plurality of ventilation holes 13 are formed on the lower surface of the cooling unit suspension arm 12. The formed hollow blower pipe 14 is provided. And two water pipes 15, 15 'are arranged on both sides before and after the blow pipe 14,
A plurality of water spray nozzles 16 are provided in the water supply pipes 15, 15 '. The water spray nozzle 16 and the blow hole 13 constitute a cooling section for asphalt pavement surface. The cooling unit suspension arm 12 is connected to the chain 11 by a connecting member 17, and the rotation of the chain 11 causes the cooling unit suspension arm 12 to slide in the vehicle width direction along the rail 8,
The two cooling unit suspension arms 12 arranged side by side are simultaneously moved in opposite directions, and are configured to be widened or housed. Further, according to the above-described embodiment, two cooling units for asphalt pavement surface are described in parallel.
It is also possible to provide more than one.

Reference numeral 18 denotes a hydraulic pump, which is connected to the hydraulic cylinder 5 and the hydraulic motor 10 by a hydraulic pipe 19 to supply oil. Reference numeral 20 denotes a water supply tube connecting the water tank 22 (see FIG. 7) of the vehicle 2 and the water supply pipes 15, 15 '. Reference numeral 21 denotes a water supply tube which is installed in the vehicle 2 and has a blower blower (not shown) and a blower pipe 14. It is a blower tube to be connected. The water supply tube 20 and the air supply tube 21 are formed of flexible members so as to be able to cope with the movement of the cooling section in the vehicle width direction (see FIGS. 1 to 4 and 8 for the above).

FIG. 5 and FIG. 6 show another embodiment. The difference from the above-mentioned embodiment is that two hydraulic cylinders 5 'are used instead of the chain 11 in order to move the cooling portion in the lateral direction. The point is to use. That is, in each of the figures, the lateral movement frame 7 'is a lateral movement frame fixed to the rear portion of the vehicle 2, and the lateral movement frame 7'
A hydraulic cylinder 5 'is provided. This hydraulic cylinder 5 'is also of the double-acting type, so that its piston rod 6' is movable in either the left or right direction. The same cooling unit suspension arms 12 as described above are suspended and fixed to the piston rods 6 'of the hydraulic cylinders 5', respectively. Each of the cooling unit suspension arms 12 can be widened or stored independently. ing. Also cooling unit suspension arm
A blower pipe 14 and water feed pipes 15, 15 'are arranged on the lower surface of 12, which is the same as in the previous embodiment. Reference numeral 18 'denotes a hydraulic pump, and a hydraulic pipe 19 is connected to the hydraulic cylinder 5'.
Is to be refueled.

FIG. 7 shows a switching mechanism of water supply to two water supply pipes 15, 15 'connected to the water spray nozzle 16, and 22 denotes a water tank provided at an arbitrary position of the vehicle 2. Yes, water is supplied to the water supply pipes 15, 15 'by the water supply pump 23. 24 is a switching valve, and two water pipes 15, 15 '
Is switched by a signal from the forward / reverse switching lever 25.

FIG. 8 shows an example in which various measuring instruments and the like are provided on the vehicle 2 in order to know the cooling state of the asphalt pavement surface, and a and b are surfaces for detecting the temperature of the road surface near the cooling section. A thermometer, c is a radiation thermometer, d is an outside air thermometer, and e is a distance meter. Measurement data from these measuring instruments is input to a computer f and processed.

<Operation> The asphalt pavement surface cooling device 1 is then run on the asphalt pavement surface on which the compaction work has been completed, and the asphalt cooling surface is cooled.

Therefore, the operation of the hydraulic cylinder 5 will be described first. The hydraulic cylinder 5 is used to move the entire lateral movement frame 7 provided with the cooling unit suspension arm 12, the blower pipe 14, the water pipe 15, and the like in the vehicle width direction. This is effective for preventing the vehicle 2 from traveling along the same trajectory and damaging the surface during work. Therefore, first, the hydraulic pump 18 is started, the piston rod 6 of the hydraulic cylinder 5 is moved by the oil sent through the hydraulic pipe 19, and the lateral movement frame 7 is moved to one of the left or right in the vehicle width direction. Move and adjust the position of the cooling section.

Next, the blowing pipe 14, the water pipe 15, and the water pipe 15 '
To explain the operation, the hydraulic pump 18 is started, oil is sent to the hydraulic motor 10, and the hydraulic motor 10 is rotated. When the hydraulic motor 10 rotates, the sprockets 9, 9 '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 unit suspension arm 12 moves while sliding on the rail 8, and each cooling unit suspension arm 12 simultaneously moves in the opposite direction. Then, the cooling unit suspension arm 12 is expanded to fit the width requiring cooling. In this case, two cooling unit suspension arms
In the overlapping portion, one of the overlapping valves 26 is closed, and in the overlapping portion, water is discharged from one of the water spray nozzles 16. Then, the blower blower and the water pump 23 are started, water is sprayed from the water spray nozzle 16 and air is blown out from the blow nozzle 13 to move the vehicle 2 at a desired speed to cool the asphalt pavement surface. Normally, the temperature of the asphalt pavement surface does not decrease to a desired temperature in a single operation. Therefore, the cooling operation is performed by reciprocating the cooling operation range a plurality of times. At this time, in the early stage of the cooling operation, the temperature of the asphalt has not yet dropped and may not be settled. Therefore, when the vehicle 2 reciprocates on the same trajectory, the road surface is solidified by the ground pressure of the vehicle 2 to form a rut. May be done. 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 to shift the position of the lateral movement frame 7 with respect to the vehicle 2 so that the passage of the vehicle 2 on the road surface changes while the widening width of the cooling unit remains unchanged.

Next, the operation of the embodiment shown in FIGS. 5 and 6 will be described. Activate the hydraulic pump 18 to send oil to the hydraulic cylinder 5 '. Since the two hydraulic cylinders 5 'arranged side by side can individually change the position of the piston rod 6', the respective piston rods 6 'are moved to adjust the position of each cooling unit suspension arm 12 to obtain the desired width. So that Further, in the case of the present embodiment, the two hydraulic cylinders 5 'can be individually moved. Therefore, by adjusting each of the hydraulic cylinders 5', even if the width of the cooling portion is the same, the vehicle can be moved. 2 can be changed.

As described above, the water supply pipe 15, the water supply pipe 15 '
Are arranged in two rows, respectively.
The water spraying is performed only by the front spraying nozzle 16 in the traveling direction, and the water supply is stopped from the rear spraying nozzle 16 so as not to perform the spraying. This is because it is efficient to cool the water sprayed on the road surface by blowing it off immediately afterward with wind pressure, and to prevent unnecessary water from staying on the road surface. If the device is provided, the switching of the water spray nozzle 16 can be automatically performed. That is, a signal that detects the position of the forward / reverse switching lever 25 is input to the switching valve 24, and the forward spraying spray nozzle
Send water only to 16.

The cooling state of the asphalt pavement surface is measured by surface thermometers a and b, and the amount of water spray is adjusted. If the outside air temperature is high and the adjustment of the watering amount is not sufficient, the speed of the vehicle 2 is reduced. Then, when the asphalt pavement surface has dropped to a desired temperature, the cooling operation is delayed. Then, when the asphalt pavement surface has dropped to the desired temperature, the cooling operation may be completed.

The cooling unit is movable vertically and the water spray nozzle
In some cases, it is convenient to be able to change the height of the ventilation holes 13 and the ventilation holes 13 with respect to the road surface. For example, if water remains on the road surface, asphalt cannot be layered and paved, so that the ventilation holes 13 can be lowered near the road surface to blow off the water, and when the device 1 is loaded on a truck bed or the like. The cooling unit can be raised so that the cooling unit does not contact the road surface.

<Effects of the Invention> As described above, according to the asphalt pavement surface cooling device according to the present invention, the laterally movable laterally movable frame in which the asphalt pavement surface cooling unit constituted by the water spray nozzle and the blow hole is disposed in the vehicle. And in the frame for lateral movement, further laterally movable in the vehicle width direction,
Also, two cooling units are arranged side by side in the front-rear direction of the vehicle, each can be moved in the vehicle width direction, and two cooling units arranged side by side can be simultaneously moved in the same direction. By moving and widening, it is possible to simultaneously cool the width equal to or greater than the vehicle width according to the road width, and it is possible to improve the cooling work efficiency. In addition, the support position of the vehicle with respect to the cooling unit can be changed, and the passing position of the vehicle can be changed even if the cooling operation is performed a plurality of times by reciprocating on the same road surface, so that the effect of preventing the occurrence of ruts can be obtained.

[Brief description of the drawings]

Drawings show an embodiment of an asphalt pavement surface cooling device according to the present invention, FIG. 1 is a side view of a cooling mechanism, FIG. 2 is a plan view showing a widening mechanism of a cooling unit,
(A) shows a closed state, (B) shows an expanded state, FIG. 3 is a bottom view of a cooling unit, FIG. 4 is a plan view showing a lateral moving mechanism, and (A) is a plan view. Neutral state, (B),
(C) shows a state of being shifted to one side, respectively.
FIG. 6 is a side view showing another example of the cooling mechanism, and FIG. 6 is a plan view showing the widening mechanism of the cooling section in FIG. 5, (A) showing a closed state, and (B) showing an expanded state. FIG. 7 is an explanatory view showing a switching mechanism of the water spray apparatus, and FIG. 8 is a side view of the present invention with various measuring instruments attached. 1 ... asphalt pavement surface cooling device main body 2 ... vehicle 3 ... cooling unit 4 ... frame 5,5 '... hydraulic cylinder 6,6' ... piston rod 7,7 '... frame for lateral movement 8 ... ... Rail 9,9 '... Sprocket 10 ... Hydraulic motor 11 ... Chain 12 ... Cooling part hanging arm 13 ... Blower hole 14 ... Blower pipe 15,15' ... Water pipe 16 ... Spray spray nozzle 17 Connection member 18, 18 'Hydraulic pump 19 Hydraulic pipe 20 Water supply tube 21 Blower tube 22 Water tank 23 Water supply pump 24 Switching valve 25 Forward / reverse switching lever 26 Valve a, b Surface thermometer c Radiant heat meter d Outside temperature thermometer e Distance meter f Computer

Claims (3)

(57) [Claims] An asphalt pavement surface cooling section comprising a water spray nozzle and a blow hole is disposed on a laterally movable laterally movable frame disposed in a vehicle, and a vehicle width direction is provided in the laterally movable frame. An asphalt pavement surface cooling device, which is further disposed so as to be able to move laterally. 2. The asphalt pavement surface cooling apparatus according to claim 1, wherein a plurality of asphalt pavement surface cooling units are arranged in the front-rear direction of the vehicle, and each of them is movable in the vehicle width direction. 3. The asphalt pavement surface cooling device according to claim 2, wherein a plurality of asphalt pavement surface cooling units arranged side by side are simultaneously movable in the same direction.