JPH0672404B2 - Cooling vehicle for paved road - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention, in asphalt pavement construction, after the asphalt is laid and suppressed, the asphalt is quickly cooled,
The present invention relates to a method for cooling a paved road that can be solidified and a cooling vehicle for a paved road, and more particularly to a cooling vehicle for a paved road that can improve the cooling efficiency of water spray.

[Conventional technology]

FIG. 13 is a perspective view of a conventional road roller 150 used for asphalt laying in asphalt pavement construction and cooling of the asphalt after pressure suppression. Road roller 150
It is equipped with one front crushing roller 152 and a plurality of crushing tires 154 on the rear side in one row in the left-right direction so that it can move forward and backward. A water tank 156 is installed at the rear of the road roller 150 to store water, and a nozzle pipe 158 is attached to the crushing tire 1.
It is arranged at a height near the upper end of the crushing tire 154 on the rear side of 54 and extends in the left-right direction of the road roller 150 by substantially the left-right width of the road roller 150. Watering nozzle 160
Are mounted on the load roller 150 downward at equal intervals in the left-right direction, and are driven by a water pump (not shown) to drive the water tank.
The water in 156 is supplied through the nozzle pipe 158 and is sprayed on the asphalt surface 23.

In the asphalt paving work, the road roller 150
The forward and backward movements are repeated within a predetermined length range of the asphalt surface 23, and the asphalt surface 23 is suppressed by the compression roller 152 and the compression tire 154. Also, asphalt after laying,
Since it easily deforms at high temperatures (about 80 ° C or higher),
While the road roller 150 is moving forward and backward, water is sprayed from the water spray nozzle 160 onto the asphalt surface 23 to cool the asphalt surface 23.

[Problems to be Solved by the Invention]

The problems of such a conventional paved road cooling device are listed below.

(A) Water sprinkled from the sprinkling nozzle 160 onto the asphalt surface 23 forms a warm water film on the surface of the asphalt surface 23, and the hot water film inhibits heat radiation from the asphalt surface 23 and is sprinkled later. Cooling water and asphalt surface 23
Inhibit contact with. Therefore, the cooling effect of the asphalt surface 23 deteriorates, the time for cooling work increases, and
The weight of the load roller 150 may cause an overpressurized state, which may cause a step or undulation on the asphalt surface 23. Also, the amount of cooling water consumed becomes large.

(B) The sprinkling width is smaller than the width of the road roller 150,
In addition, the work is fixed in the left-right direction, which causes a loss of work in cooperation with the asphalt laying work vehicle and increases the overall work time of the asphalt pavement work.

(C) The sprinkling place is limited to the place where the road roller 150 has passed. Therefore, in order to spray water on the asphalt surface 23 over the entire left-right direction, or to change the left-right direction spraying place, it is necessary to move the load roller 150 finely in the left-right direction. It becomes complicated.

(D) Since the position of the sprinkling nozzle 160 is fixed in the height direction, the height of the sprinkling nozzle 160 is determined in consideration of the movement of the load roller 150 during non-sprinkling work without hindrance. From the standpoint of work, the height of the sprinkling nozzle 160 is set higher by an appropriate height.

An object of the present invention is to overcome the above-mentioned problems (a), (b), (c), and to increase the sprinkling width beyond the left and right width of a paved road cooling vehicle, and depending on the situation. As well as being able to adjust the watering width, the watering location in the lateral direction of the paved road cooling vehicle is not limited to only the lower side of the cooling vehicle,
It is also possible to set it to the side.

[Means for Solving the Problems] The present invention will be described using the reference numerals of the drawings corresponding to the embodiments.

In this invention, the pressurized air to the paved road (23) is sprayed in parallel with the watering to the paved road (23), and the cooling vehicle (10) for the paved road (23) is A plurality of air nozzles (40) that are arranged in the left-right direction and blow pressurized air to the paved road (23), and a plurality of water nozzles (44) that are arranged in the lateral direction and spray water on the paved road (23). Equipped with a row of air nozzles (40) and water nozzles (44)
And two rows of nozzle supports (124a, 124b) that can project laterally are provided, and these nozzle supports (124a, 124b) are moved by the left-right relative movement means (130). Relative displacement is possible in the left-right direction. Thus, it has a common support body (120) for commonly supporting the nozzle support bodies (124a, 124b), and a left-right direction integral movement means (128) for displacing the common support body (120) in the left-right direction. It becomes.

[Action]

In the present invention, water is sprinkled onto the paved road (23) to cool the paved road (23) while the water is transferred to the paved road (2).
There is a tendency to form a hot water film on the surface of 3). The pressurized air is blown onto the paved road (23) to remove the hot water film from the surface of the paved road (23). As a result, the surface of the paved road (23) is exposed and brought into contact with the cooling water spattered later.

From the water nozzles (44) arranged in the horizontal direction to the paved road (2
Water was sprinkled on 3), and the water sprayed on the paved road (2
3) Cool. On the other hand, this water tends to form a warm water film on the surface of the paved road (23). The pressurized air is blown onto the paved road (23) from the air nozzles (40) arranged in the left-right direction to remove the hot water film from the surface of the paved road (23). As a result, the surface of the paved road (23) is exposed and brought into contact with the cooling water spattered later.

The two nozzle supports (124a, 124b) are relatively displaced in the left-right direction by the operation of the left-right direction relative movement means (130). In addition, the nozzle supports (124a, 124b) are
It protrudes sideways beyond the left and right ends of (0). As a result, the sprinkling width and the pressurized air blowing width change and can be increased beyond the lateral width of the cooling vehicle (10).

When the left-right direction integral moving means (128) is activated, the common support body (120) is displaced in the left-right direction. The two nozzle supports (124a, 124b) are integrally displaced with the common support (120) in the left-right direction, and as a result, the water spraying and pressurized air blowing positions in the left-right direction of the cooling vehicle (10) are It is also possible to change the location to the side of the cooling vehicle (10).

〔Example〕

The present invention will be described below with reference to the embodiments shown in FIGS. 1 to 12.

FIG. 3 is a perspective view of the cooling vehicle 10. The cooling vehicle 10 is provided with front tires 12 and rear tires 14 at the front and rear, respectively, and can move forward and backward, and has a driver's seat 16, a water tank 18, and a machine room 20 in order from the front side. 50 water in the water tank 18 (Fig. 5)
Are stored and the supporting device 22 is mounted on the rear end of the cooling vehicle 10.

FIG. 4 is a structural diagram of the inside of the machine room 20. The cooling vehicle 10 repeatedly sprays back and forth on the asphalt surface 23 in the asphalt pavement work, and sprays water and pressurizes air onto the asphalt surface 23, as will be described later. Blower 24, Engine 26
The air outside the machine chamber 20 is sucked from the silencer 29 via the suction hose 28 and discharged to the discharge hose 30. The branch pipe 32 connects the downstream end of the discharge hose 30 to the air hose 34.
It is connected to a and 34b. The water pump 36 is also driven by the engine 26, sucks the water in the water tank 18, and pumps it. The air pipes 38a, 38b are respectively arranged at the front and rear, extend horizontally in the left-right direction of the cooling wheel 10, and have a length substantially equal to the left-right width of the cooling wheel 10. The air pipes 38a, 38b are connected to the downstream ends of the air hoses 34a, 34b at their left and right ends, respectively, and pressurized air is supplied from the blower 24 via them. The air nozzles 40 are attached to the lower surfaces of the air pipes 38a, 38b downward at equal intervals in the longitudinal direction of the air pipes 38a, 38b at equal intervals, and pressurized air supplied from the air pipes 38a, 38b is supplied. To the asphalt surface 23. Water pipe
The air pipes 42a, 42b are arranged in front of and behind the respective air pipes 38a, 38b so as to extend in parallel with each other and by the same length.
It is mounted on 38a, 38b and receives water from a water pump. The water nozzles 44 are attached to the lower surfaces of the respective water pipes 42a, 42b downward in the longitudinal direction thereof and at equal intervals over the entire length thereof, and the water supplied from the water pipes 42a, 42b is used as cooling water for the asphalt surface 23. Sprinkle on.

FIG. 5 is a system diagram of cooling water and pressurized air. Blower 24
Are driven by the rotational power transmitted from the engine 26 via the belt 46. The water tank 18 stores water 50 therein, and the water pump 36 is driven by the rotational power transmitted from the engine 26 via the belt 52, and the water 50 in the water tank 18 is passed through the strainer 56 and the water absorption pipe 54. Inhale. Regulator valve
58 is connected to the discharge side of the water pump 36, returns excess water 50 to the water tank 18 via the excess water hose 60, and guides the adjusted water 50 to the water hose 62. Cheese 64 has a water hose 62
The downstream end of the valve is branched to the water pipes 66a, 66b, and the electromagnetic opening / closing valves 68a, 68b are
Are arranged in the water pipes 66a and 66b, respectively, and are opened when electricity is applied.

The shift lever 70 is swingably disposed in the vicinity of the driver's seat of the driver's seat 16 in FIG. 3 and is manually operated by the driver to switch the forward and backward gears of the transmission of the power transmission system of the cooling vehicle 10,
Controls the forward / backward movement of the cooling vehicle 10. Forward / backward detection switch 72
Is switched in relation to the forward / backward swing of the shift lever 70, and the battery 74 is connected to the electromagnetic opening / closing valves 68a and 68b at the forward and backward positions of the shift lever 70 to be energized.

FIG. 6 is a configuration diagram of the position adjusting mechanism of the supporting device 22. The fixed guide frame 76 has a lower end rotatably coupled to a rear end of a bogie 78 of the cooling wheel 10, and the support rod 80 extends obliquely so that upper and lower ends thereof are rotatably upper ends. Also, the fixed guide frame 76 is supported in the vertical direction by being connected to the carriage 78. The moving frame 82 is
The roller 84 is inserted between the fixed guide frames 76 so as to be sandwiched from the front and rear, and is pressed from the front and back by a roller 84 attached to the inner surface side of the fixed guide frame 76, and is guided in the vertical direction. In the upright state, the hydraulic cylinder 86 has a moving frame 82 at the upper and lower ends.
Is rotatably connected to the upper end of the and the carriage 78, and the movable frame 82 is moved up and down by expansion and contraction. The hydraulic pump 88 is driven by rotational power from the engine 26 transmitted via the belt 90, and sucks and discharges the oil 94 in the oil tank 92. Regulator valve
96 is provided on the discharge side of the hydraulic pump 88 and sends the adjusted hydraulic pressure to the line pressure oil passage 98. The vertical movement switch 100, working width adjustment switch 102, and lateral movement switch 104
They are provided inside to control connection between the battery 74 and the electromagnetic switching valve 108, the electromagnetic switching valve 108, and the electromagnetic switching valve 110, respectively. Oil passage 1
12a and 112b are connected to each oil chamber in the hydraulic cylinder 86, and the electromagnetic switching valve 106 controls the connection between the line pressure oil passage 98 and the oil passages 112a and 112b to control the expansion / contraction amount of the hydraulic cylinder 86. . Oil passage
114a and 114b are connected to respective oil chambers in a hydraulic motor 130, which will be described later, and the electromagnetic switching valve 108 includes a line pressure oil passage 98 and oil passages 114a and 114b.
By controlling the connection with the hydraulic motor 130, the hydraulic motor 130 is rotated forward and backward and stopped. The oil passages 116a and 116b are connected to respective oil chambers in a hydraulic motor 128 described later, and the electromagnetic switching valve 110 controls the connection between the line pressure oil passage 98 and the oil passages 116a and 116b to operate the hydraulic motor 128. Forward and reverse and stop.

7 and 8 are vertical sectional views of the cooling vehicle 10 of the horizontal movement mechanism of the support device 22 in the front-rear direction and the left-right direction.

In FIG. 7, the support base 118 is fixed to the fixed guide frame 76, projects to the rear, and moves up and down integrally with the fixed guide frame 76. The floating plate 120 is fitted into the support base 118 and mounted on a support roller 122 attached to the support base 118, and the support roller 122 rolls to the support base 118 in the left-right direction of the cooling vehicle 10. It is freely displaceable. The nozzle supports 124a, 124b are arranged on the front side and the rear side, respectively, and have a U-shaped cross section.
The lower edge of 0 is inserted inside the U-shaped cross section, and the lower edge of the floating plate 120 is mounted on a support roller 126 rotatably attached to the upper surface of the lower edge of the floating plate 120.
By the rolling of the cooling plate 10, the cooling plate 10 can be displaced in the left-right direction of the cooling plate 10. Air tube 38a, 38
b is suspended from the nozzle supports 124a and 124b, respectively, and is displaced in the left-right direction integrally with the nozzle supports 124a and 124b. The hydraulic motor 128 is fixedly installed on the upper surface of the support base 118 and is supplied with hydraulic pressure via the oil passages 116a and 116b shown in FIG. Hydraulic motor 1
30 is fixed to the lower surface of the floating plate 120,
Hydraulic pressure is supplied through the oil passages 114a and 114b in FIG.

In FIG. 8, the sprocket 132 is integrally and rotatably attached to the output shaft of the hydraulic motor 128, and a pair of sprockets 13 are provided.
4 is rotatably attached to the upper wall of the support base 118 on both lower sides of the sprocket 132. Both ends of the chain 136 are locked to the left and right ends of the upper wall of the floating plate 120 and are hung on the sprocket 132 and the sprocket 134. Rotation of sprocket 132 causes chain 1
36 moves with respect to the sprocket 132, and as a result, the horizontal position of the floating plate 120 changes.

FIG. 9 is a plan view of a chain mechanism that relatively displaces the nozzle supports 124a and 124b in the left-right direction. Sprocket 138
Is attached to the output shaft of the hydraulic motor 130 so as to rotate integrally, and the two sprockets 140 are attached to the floating plate 1.
It is rotatably attached to both left and right ends of 20. The endless chain 142 is hung on the sprocket 138 and the sprocket 140, and the couplers 144a and 144b connect the endless chain 142 and the ends of the nozzle supports 124a and 124b. As the sprocket 138 rotates, the couplers 144a and 144b are
138 towards the nozzle support 124a, 124b
Respectively project to the left and right of the cooling vehicle 10. In the state of FIG. 9, the nozzle supports 124a and 124b are aligned in the left-right direction, and the widths of spraying water and the pressurized air sprayed from the air nozzle 40 and the water nozzle 44 are the same as those of the cooling vehicle 10 in the left-right direction. It is almost equal to the left and right width, and is the minimum.

10 and 11 show the horizontal positions of the nozzle supports 124a, 124b with respect to the horizontal center line C of the cooling vehicle 10 when the floating plate 120 is displaced leftward and rightward, respectively. It is the figure shown in the state seen from. The nozzle supports 124a, 124b are displaced leftward and rightward with respect to each other, and the overlapping dimension in the left-right direction is small,
The width of water sprayed from the air nozzle 40 and the water nozzle 44 and the width of the pressurized air blow are almost twice as large as those in the case of FIG. 9, and are maximum. In FIG. 10, the center of the floating plate 120 is displaced leftward with respect to the horizontal center line C of the cooling vehicle 10,
The water spraying position and the pressurized air spraying position from the air nozzle 40 and the water nozzle 44 reach the left side of the left end of the cooling vehicle 10. In contrast, in FIG. 11, the floating plate
The center of 120 is displaced to the right with respect to the left-right center line C of the cooling vehicle 10, and the spraying position and the pressurized air blowing position from the air nozzle 40 and the water nozzle 44 reach the right side from the right end of the cooling vehicle 10. ing.

FIG. 1 and FIG. 2 are views showing the structure of the inside of the machine room 20 together with the sprinkling state and spraying of pressurized air when the cooling wheel 10 is moving forward and backward. The forward / backward movement of the cooling vehicle 10 is detected by the forward / backward movement detection switch 72 (Fig. 5), and the electromagnetic opening / closing valves 68a and 68b (Fig. 5) are selectively opened. Thus
When moving forward, water is sprinkled from the water nozzle 44 of the water pipe 42a on the front side in the front-rear direction of the cooling vehicle 10 with respect to the air pipes 38a, 38b, and when traveling backward, the water nozzles on the rear side in the front-rear direction of the cooling vehicle 10 with respect to the air tubes 38a, 38b. Water is sprayed from the water nozzle 44 of the water pipe 42b.

The operation of the embodiment will be described.

Asphalt paving work, asphalt laying,
After squeezing, cool down to the place of asphalt surface 23 to cool
Move 10

By operating the vertical movement switch 100, the hydraulic cylinder 86 is expanded and contracted, and the air nozzle 40 and the water nozzle 44 are moved to the asphalt surface 23.
Position it at an appropriate height from. Further, by operating the working width adjustment switch 102, the hydraulic motor 130 is normally and reversely rotated, the nozzle supports 124a, 124b are relatively moved in the left and right directions, and the pressurized air spraying width from the air nozzle 40 and the water nozzle 44 are moved. water
Change the spraying width of 50 (hereinafter referred to as the "working width" including the spraying width and the spraying width). Further, the lateral movement switch 104 is operated to rotate the hydraulic motor 128 in the forward and reverse directions to move the floating plate 120 relative to the support base 118 in the left-right direction, so that the pressurized air is blown from the air nozzle 40 and the water nozzle 44. The spraying position of the water 50 from (hereinafter, referred to as “working position” including the spraying position and the spraying position) is changed.

12 (a) to 12 (d) show various examples of the working width L and the working position. Working width L is the minimum cooling vehicle
It is adjustable from almost the left and right width of 10 to twice the left and right width of the cooling vehicle 10 as the maximum. Further, the work position can be extended to the left and right of the cooling vehicle 10 by moving the floating plate 120 in the left-right direction.

The cooling wheel 10 travels back and forth on the asphalt surface 23 within a predetermined range, and at that time, jets pressurized air and water 50 from the air nozzle 40 and the water nozzle 44 toward the asphalt surface 23, respectively. When the cooling vehicle 10 is moved forward and backward, the shift lever 70 is switched, and the water pipes 66a, 66b are selectively opened via the solenoid valves 68a, 68b interlocking with the shift lever 70 to selectively water the water pipes 42a, 42b.
50 is led. As a result, as shown in FIGS. 1 and 2, water 50 is always jetted toward the asphalt surface 23 from the water pipe 42a or 42b which is always in the forward direction of the cooling vehicle 10 with respect to the air pipes 38a, 38b. To be done.

Water 50 sprinkled on the asphalt surface 23 is asphalt surface
While cooling 23, it tends to form a hot water film on the asphalt surface 23. The pressurized air blown from the air nozzle 40 onto the asphalt surface 23 removes the warm water film from the asphalt surface 23. As a result, the asphalt surface 23 is exposed and heat dissipation is promoted, and the asphalt surface 23 is efficiently contacted with the water 50 that is sprayed later, and the cooling efficiency of the asphalt surface 23 by the water 50 that is sprayed later is increased. .

When the cooling vehicle 10 is moved after the cooling work of the asphalt surface 23 is completed, the vertical movement switch 100 is operated to extend the hydraulic cylinder 86 and hold the support device 22 at a high position, thereby cooling the cooling vehicle 10. Run 10. This allows the air nozzle
It is possible to avoid the collision of the water nozzle 44 and the water nozzle 44 with the obstacle on the road, and allow the cooling vehicle 10 to travel smoothly.

In the illustrated cooling vehicle 10, as shown in FIGS. 1 and 2, water is sprayed from the water pipe 42a or 42b located on the front side of the air pipes 38a, 38b with respect to the traveling direction of the cooling vehicle 10, and after spraying. It is designed to blow pressurized air from
On the contrary, water is sprayed from the water pipe 42b or 42b behind the air pipes 38a, 38b with respect to the traveling direction of the cooling vehicle 10, and the hot water film is removed from the surface of the asphalt surface 23 by pressurized air spraying before water spraying. You may do it.

〔The invention's effect〕

In the present invention, by spraying pressurized air onto the pavement in parallel with watering the pavement,
The hot water film formed on the surface of the paved road by the cooling water previously sprayed is removed. Therefore, the heat radiation from the paved road and the contact of the cooling water sprinkled on the paved road later are promoted, the heat radiation efficiency and the cooling efficiency by the cooling water are improved, the cooling work time is shortened, and the overpayment of the paved road is suppressed. And the consumption of cooling water can be reduced.

Further, two nozzle supports equipped with rows of water nozzles and air nozzles are provided, and these can be projected laterally relative to the cooling vehicle and can be displaced relative to each other by a lateral relative movement means. Therefore, the sprinkling width and the blowing width of the cooling wheel can be adjusted according to the situation, and the width can be increased beyond the width of the cooling wheel, so that efficient water sprinkling and pressurized air blowing work can be performed.

Furthermore, the nozzle support body can be moved in the left-right direction by the operation of the left-right integrated moving means, and the water spraying and pressurized air spraying positions can be set at a side position of the cooling vehicle. As a result, it is possible to omit the trouble of moving the cooling wheel in the left-right direction one by one when changing the water spraying and the pressurized air spraying positions in the left-right direction, which simplifies the driving operation of the cooling vehicle and enhances the work efficiency. it can.

[Brief description of drawings]

FIGS. 1 to 12 relate to an embodiment of the present invention, and FIGS. 1 and 2 are views showing the structure of the inside of a machine room with water spraying and pressurized air blowing when the cooling wheel is moving forward and backward, respectively. FIG. 3 is a perspective view of a cooling vehicle, FIG. 4 is a structural view of a machine room, FIG. 5 is a system diagram of cooling water and pressurized air, and FIG. 6 is a configuration diagram of a position adjusting mechanism of a supporting device. 7 and 8 are vertical cross-sectional views of the cooling vehicle of the horizontal movement mechanism of the supporting device in the front-rear direction and the left-right direction, and FIG. 10 and 11 show the horizontal position of the nozzle support body with respect to the left-right center line C of the cooling vehicle when the floating plate is displaced leftward and rightward, respectively, as viewed from the rear and the upper side of the cooling vehicle. The drawings shown in FIGS. 12 (a) to 12 (d) show the working width L and Shows various examples of work positions,
FIG. 13 is a perspective view of a conventional road roller used for asphalt laying in asphalt pavement work and cooling of asphalt after pressure suppression. 10 …… Cooling car, 23 …… Asphalt surface (paved road), 40
...... Air nozzle, 44 …… Water nozzle, 86 …… Hydraulic cylinder (vertical moving means), 120 …… Floating plate (common support), 124a, 124b …… Nozzle support, 128…
… Hydraulic motor (left-right integrated moving means), 130… hydraulic motor (left-right relative moving means).

Claims (1)

[Claims] 1. The sprayed air to the paved road (23) is sprayed with the compressed air to the paved road (23) in parallel with the spraying of the pressurized air to the paved road (23). In a cooling vehicle for a paved road, comprising a plurality of air nozzles (40) and a plurality of water nozzles (44) arranged in the left-right direction and spraying water on the paved road (23), a row of the air nozzles (40) And two rows of water nozzles (44) are provided, and two nozzle supports (124a, 124b) that can project laterally are provided, and these nozzle supports (124a, 124b) move in the left-right relative direction. A common support (120), which is relatively displaceable in the left-right direction by means (130), supports the nozzle supports (124a, 124b) in common, and the common support (1).
Horizontally moving means (12)
8) A cooling vehicle for paved roads, characterized by comprising: