JP2004131958A - Emulsion spray - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To shorten a time for changing works and prevent a misoperation such as a forgetful mistake of a changing operation of the changeover valve of an emulsion circuit or an erroneous changingover operation. <P>SOLUTION: The emulsion spray is provided with an emulsion circulation path leading an emulsion from an emulsion tank storing the emulsion to an emulsion spray bar having a built-in spray nozzle through an emulsion return path and a cleaning solution passage making the solution converge through a cleaning solution tank storing the solution after bifurcation from the emulsion return path. And further, this spray is provided with a first changeover valve 27 interposed in the converging part where the cleaning solution path converges on the emulsion advancing path and a second changeover valve 28 where the solution is jointed with the bifurcation section bifurcating from the emulsion return path. Moreover, the emulsion spray is provided with a spray control unit 47b controlling changeover for the stream directions of the first changeover valve 27 and the second changeover valve 28, so that the emulsion flows in the return path from the emulsion tank via the first changeover valve and the second changeover valve 28. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an emulsion spraying device in asphalt pavement work.
[0002]
[Prior art]
Generally, in asphalt pavement work, an asphalt emulsion is sprayed by an emulsion spraying device as an adhesive between a ground surface to be ground and an asphalt mixture to be paved from above. When spraying an emulsion, the emulsion sprayer sends the emulsion stored in the emulsion tank from the emulsion tank to the emulsion spray bar via the emulsion outward path, and sprays the emulsion onto the road from a plurality of spray nozzles built in the emulsion spray bar. . When the dispersion of the emulsion is stopped, the emulsion stored in the emulsion tank is circulated in the emulsion circulation path from the emulsion tank to the emulsion spray bar via the emulsion outward path and from the emulsion spray bar to the emulsion tank via the emulsion return path.
[0003]
At the end of the emulsion spraying, the washing liquid for washing the inside of the emulsion circulation path is sent from the washing liquid tank to the emulsion outward path via the washing liquid path, sent to the emulsion return path via the emulsion spray bar, and branched off on the emulsion return path to branch off the washing liquid path. And return to the cleaning solution tank. Further, the emulsion in the emulsion tank is sent from the emulsion outward path to the emulsion return path via the emulsion spray bar, branches off in the emulsion return path, enters the cleaning liquid path, branches off in the cleaning liquid path, and is discharged from the discharge path. A switching valve for switching the direction of the flow path is interposed at a branch point or a junction of the path constructed in such a configuration, and the switching valve is manually switched for each operation (for example, see Patent Document 1). .).
[0004]
[Patent Document 1]
JP-A-11-256511 (Pages 2-6, FIG. 5)
[0005]
[Problems to be solved by the invention]
However, in the above-described conventional emulsion spraying apparatus, since a plurality of switching valves are manually switched for each operation, erroneous operations such as forgetting to switch the switching valve or making a mistake in switching are often seen, and the plurality of switching valves are manually switched. Therefore, there is a problem that a long time is required for the switching operation.
[0006]
The present invention has been made in consideration of the above-described problem, and has as its object to suppress an erroneous operation such as forgetting to switch a switching valve or making a mistake in switching. Another object is to reduce the time required for the switching operation.
[0007]
[Means for Solving the Problems]
The invention according to claim 1 is an emulsion circulation path from an emulsion tank for storing emulsion to an emulsion spray bar containing a spray nozzle via an emulsion outward path and returning the emulsion from the emulsion spray bar to the emulsion tank via an emulsion return path. A washing liquid path that branches from the emulsion return path and joins the emulsion outward path via a washing liquid tank that stores the washing liquid, and a first switch disposed at a junction where the cleaning liquid path joins the emulsion outward path. An emulsion dispersing apparatus comprising a valve and a second switching valve interposed at a branch portion where the washing liquid path branches off from the emulsion return path, wherein the first liquid flows from the emulsion tank into the emulsion circulation path, and A spray control unit that controls switching of the flow direction of the first switching valve and the second switching valve so as to return to the emulsion tank via the switching valve and the second switching valve. It is a symptom.
[0008]
With such a feature, the switching operation of the plurality of switching valves corresponding to the spraying operation of spraying the emulsion in the emulsion tank on the road is controlled by the spraying control unit.
[0009]
The invention according to claim 2 is the emulsion spraying apparatus according to claim 1, wherein the discharge path branches from the cleaning liquid path to the outside of the cleaning liquid tank and reaches the outside, and the discharge path branches from the cleaning liquid path. A third switching valve interposed in a portion thereof, and a cleaning liquid flowing from the cleaning liquid tank into the emulsion circulation path via the first switching valve, and flowing into the emulsion circulation path via the second switching valve. Flow through the cleaning liquid path and return to the cleaning liquid tank via the third switching valve in the flow direction of the first switching valve, the second switching valve, and the third switching valve. A line cleaning control unit for controlling switching.
[0010]
With such a feature, the switching operation of the plurality of switching valves corresponding to the line cleaning operation for cleaning the emulsion adhering in the emulsion circulation path with the cleaning liquid is controlled by the line cleaning control unit.
[0011]
According to a third aspect of the present invention, there is provided the emulsion spraying apparatus according to the first or second aspect, wherein the second switching valve flows from the emulsion tank into the emulsion circulation path, passes through the first switching valve, and then passes through the first switching valve. The first switch valve and the second switch are configured to flow into the cleaning liquid path via a valve, flow into the discharge path via the third switch valve, and discharge from the discharge path to the outside. And an emulsion extraction control unit for controlling the switching of the flow direction of the valve and the third switching valve.
[0012]
With such a feature, the switching operation of the plurality of switching valves corresponding to the emulsion extracting operation for discharging the emulsion in the emulsion tank to the outside is controlled by the emulsion extracting control unit.
[0013]
According to a fourth aspect of the present invention, there is provided the emulsion dispersing apparatus according to any one of the first to third aspects, wherein a fourth switching valve interposed in an emulsion supply path connected from the emulsion supply source to the emulsion outward path. And an emulsion loading controller for controlling the opening and closing of the second switching valve.
[0014]
With such a feature, the switching operation of the plurality of switching valves corresponding to the loading operation of supplying the emulsion stored in the emulsion tank from the emulsion supply source is controlled by the emulsion loading control unit.
[0015]
According to a fifth aspect of the present invention, there is provided the emulsion dispersing apparatus according to any one of the first to fourth aspects, wherein a fifth switching valve interposed in an air supply path connected from the air supply source to the emulsion outward path. And an air control unit for controlling the opening and closing of the air conditioner.
[0016]
With such a feature, the air operation for applying the air pressure in the emulsion circulation path, the cleaning liquid path, and the discharge path is controlled by the air control unit.
[0017]
According to a sixth aspect of the present invention, there is provided the emulsion spraying apparatus according to any one of the first to fifth aspects, wherein the second liquid is supplied from the emulsion return path to the emulsion tank through the second switching valve. And an emulsion return control unit for switching the flow direction of the switching valve.
[0018]
With such a feature, the operation of switching the plurality of switching valves corresponding to the operation of returning the emulsion in the emulsion circulation path to the emulsion tank is controlled by the emulsion return control section.
[0019]
The invention according to claim 7 is the emulsion spraying apparatus according to any one of claims 2 to 6, wherein the third switching is performed from the emulsion return path to the cleaning liquid path via the second switching valve. The cleaning liquid return control unit controls switching of the flow direction of the second switching valve and the third switching valve so as to reach the cleaning liquid tank via a valve.
[0020]
With such a feature, the operation of switching the plurality of switching valves corresponding to the operation of returning the cleaning liquid in the emulsion circulation path to the cleaning liquid tank is controlled by the cleaning liquid return control unit.
[0021]
The invention according to claim 8 is the emulsion spraying apparatus according to claim 7, wherein the line cleaning control unit, the emulsion return control unit, and the cleaning liquid return control unit are each connected to a power supply device via a cleaning control unit. It is characterized by being connected.
[0022]
With such a feature, the line cleaning control unit, the emulsion return control unit, and the cleaning liquid return control unit are enabled only when the cleaning control unit is in operation.
[0023]
The invention according to claim 9 is the emulsion spraying device according to claim 8, wherein the emulsion loading control unit, the spraying control unit, the washing control unit, and the emulsion extracting control unit are each controlled by a first monolever. It is characterized by being switchable.
[0024]
With such a feature, the emulsion loading control unit, the spraying control unit, the washing control unit, and the emulsion extraction control unit are not switched over.
[0025]
The invention according to claim 10 is the emulsion spraying apparatus according to any one of claims 7 to 9, wherein the line cleaning control unit, the emulsion return control unit, and the cleaning liquid return control unit are controlled by a second monolever. It is characterized in that each can be switched.
[0026]
Due to such features, the line cleaning control unit, the emulsion return control unit, and the cleaning liquid return control unit are not switched over.
[0027]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of an emulsion spraying apparatus according to the present invention will be described with reference to the drawings. In the present embodiment, an asphalt finisher with an emulsion spraying device that simultaneously spreads the emulsion and spreads the asphalt mixture will be described.
[0028]
As shown in FIGS. 1 and 2, the asphalt finisher with an emulsion spraying device is a road paving machine in which the emulsion spraying device 21 is mounted on an asphalt finisher of a self-propelled machine for spreading an asphalt mixture.
[0029]
The asphalt finisher mainly includes a front wheel 1a and a rear wheel 1b, a vehicle body 2, an engine 3, a hopper 4 containing an asphalt mixture, a bar feeder 5 for carrying out the asphalt mixture in the hopper 4, and an asphalt carried by the bar feeder 5. It comprises a spreading screw 6 for feeding the mixture to the road surface and a screed 7 for spreading the asphalt mixture sent to the road surface 8.
[0030]
The front wheel 1a and the rear wheel 1b are respectively in contact with the road surface 8, the four front wheels 1a are arranged in two rows, and the two rear wheels 1b are arranged in one row, and are arranged at intervals. The vehicle body 2 is supported by a front wheel 1a and a rear wheel 1b, and a driver's seat 9 is mounted on a rear portion of the vehicle body 2. At the center of the vehicle body 2 is mounted a box-shaped engine room 10 surrounded by metal plates on the upper, lower, and four sides. The engine 3 is installed in the center of the engine room 10. The hopper 4 is installed at the front of the vehicle body 2, and the spreading screw 6 is installed behind the rear wheel 1 b in the width direction of the vehicle body 2. A bar feeder 5 is interposed between the hopper 4 and the spreading screw 6. The bar feeder 5 is installed below the engine room 10 along the front-back direction of the vehicle body 2. Behind the spreading screw 6, a screed 7 is installed supported by the vehicle body 2. The screed 2 is a pair of members provided so as to be able to expand and contract separately in right and left, front and rear.
[0031]
As shown in FIG. 1, FIG. 2, and FIG. 3, the emulsion dispersing apparatus 21 includes an emulsion tank 11 for storing asphalt emulsion, an emulsion forward path 12 for guiding the asphalt emulsion in the emulsion tank 11, and an emulsion forward path 12 through the emulsion forward path 12. It comprises an emulsion spray bar 13 for distributing a part of the asphalt emulsion sent from the tank 11 to a plurality of spray nozzles 13a, and an emulsion return path 14 for returning the asphalt emulsion sent to the emulsion spray bar 13 to the emulsion tank 11.
[0032]
The emulsion tank 11 is installed between the engine room 10 and the driver's seat 9, and is installed between the left and right rear wheels 1 b and the spreading screw 6 via an emulsion forward path 12 that branches right and left on the way. One end of each of the left emulsion spray bar 13b and the right emulsion spray bar 13c is connected. An emulsion filter 15 is interposed before the branch of the emulsion outward path 12. The emulsion filter 15 is installed below the engine room 10 and between the front wheel 1a and the rear wheel 1b, and is a device for filtering and sending out the asphalt emulsion sent from the emulsion tank 11.
[0033]
An emulsion pump 16 is provided in front of the emulsion filter 15 just before the branch of the emulsion outward path 12. The emulsion pump 16 is a device installed next to the emulsion filter 15 and rotated by a hydraulic motor (not shown) to pump the asphalt emulsion in the emulsion filter 15 to the emulsion spray bar 13. The emulsion pump 16 is a device that is operated by an emulsion circulation switch (not shown) provided in the driver's seat, and includes, for example, a gear pump, but the type is arbitrary and other pumps can be used.
[0034]
A plurality of spray nozzles 13a for spraying asphalt emulsion on the road surface 8 are built in the emulsion spray bar 13 downward. The other ends of the left emulsion spray bar 13b and the right emulsion spray bar 13c are respectively connected to two emulsion return paths 14 which join on the way, and are connected to the emulsion tank 11 via the emulsion return path 14. As described above, the emulsion forward path 12 and the emulsion return path 14 form an emulsion circuit closed via the emulsion tank 11 and the emulsion spray bar 13, and form an emulsion circulation path 17.
[0035]
The emulsion circulation path 17 is provided with an emulsion cleaning device 22 for cleaning the inside of the emulsion circulation path 17 and the like. The emulsion cleaning device 22 includes a cleaning liquid tank 18 for storing a cleaning liquid, and a cleaning liquid path 19 for flowing the cleaning liquid into the emulsion circulation path 17.
[0036]
The cleaning liquid tank 18 is installed in the engine room 10 next to the engine 3 and stores a cleaning liquid for removing asphalt emulsion adhering to the emulsion circulation path 17. The cleaning liquid path 19 has both ends connected to the emulsion circulation path 17, respectively, and a cleaning liquid tank 18 is interposed in the middle. One end of the washing liquid path 19 is connected to the emulsion forward path 12 before the emulsion filter 15, and the other end is connected to the emulsion return path 14.
[0037]
A first switching valve 27 is provided at the junction of the emulsion outward path 12 and the cleaning liquid path 19. The first switching valve 27 is provided with a first switching valve 27 a provided in the emulsion outward path 12 and a cleaning liquid. And a first switching valve 27b interposed in the path 19. A second switching valve 28 is provided at a branch point between the emulsion return path 14 and the washing liquid path 19, and the second switching valve 28 is connected to a second switching valve 28 a provided in the emulsion return path 14. And a second switching valve 28b interposed in the cleaning liquid pipe 19. Each of the first switching valve 27 and the second switching valve 28 is a two-way solenoid valve, and is a device for controlling a flow of a fluid such as an asphalt emulsion, a cleaning liquid, and air.
[0038]
A discharge path 20 leading to the outside is connected via a third switching valve 29 in front of the cleaning liquid tank 18 with respect to the cleaning liquid pipe 19. The third switching valve 29 is a three-way solenoid valve, and is a device that controls the direction of the flow path in the direction of the cleaning liquid tank 18 or in the direction of the discharge path 20.
[0039]
An emulsion supply path 24 leading to an emulsion supply source 23 and an air supply path 26 leading to an air supply source 25 are connected to the emulsion forward path 12 at a point beyond a first switching valve 27a interposed in the emulsion forward path 12. Have been. A fourth switching valve 30 is interposed in the emulsion supply path 24, and a fifth switching valve 31 is interposed in the air supply path 26. The fourth switching valve 30 and the fifth switching valve 31 are two-way solenoid valves, and are devices that control the flow of asphalt emulsion or air. The first switching valve 27, the second switching valve 28, the fourth switching valve 30, and the fifth switching valve 31 are each in a normally closed state, and the third switching valve 29 is constantly switched from the cleaning liquid path 19 to the discharge path 20. Flow direction.
[0040]
The first switching valve 27, the second switching valve 28, the third switching valve 29, the fourth switching valve 30, and the fifth switching valve 31 are connected to an operation panel (not shown), respectively. The operation panel includes a control circuit 46 shown in FIG. 4 and a plurality of switches (loading switch 33, spraying switch 34, washing switch 35, air switch 36, emulsion It comprises a return switch 37, a line cleaning switch 38, a cleaning liquid return switch 39, and an emulsion extracting switch 40). As shown in FIG. 4, the plurality of switches are connected to a first switching valve 27, a second switching valve 28, a third switching valve 29, a fourth switching valve 30, a fifth switching valve via a control circuit 46. Each is connected to a valve 31. Further, as shown in FIG. 1, the switch box 32 is installed in a driver's seat.
[0041]
The loading switch 33 is connected to the second switching valve 28a and the fourth switching valve 30 interposed in the emulsion return path 14. The spray switch 34 is connected to a first switching valve 27a provided on the emulsion outward path 12 and connected to a second switching valve 28a provided on the emulsion return path 14 via a relay 41. I have. The relay 41 is a device that opens and closes a switch section 41a of the relay in conjunction with an electric signal received by a relay 41b connected to the emulsion control panel 42.
[0042]
The washing switch 35 is connected to an emulsion returning switch 37, a line washing switch 38, and a washing liquid returning switch 39, respectively. The emulsion returning switch 37 is connected to a second switching valve 28a interposed in the emulsion returning path 14, and the line washing is performed. The switch 38 is connected to the first switching valve 27b disposed in the cleaning liquid path 19 and the second switching valve 28b and the third switching valve 29 disposed in the cleaning liquid pipe 19, and the cleaning liquid return switch 39 is connected to the cleaning liquid path. 19 are connected to a second switching valve 28b and a third switching valve 29, respectively. The emulsion extracting switch 40 is connected to a first switching valve 27a interposed in the emulsion outward path 12 and a second switching valve 28b interposed in the washing liquid pipe 19, respectively.
[0043]
As shown in FIG. 5, the switch box 32 includes a loading switch 33, a spray switch 34, a washing switch 35, and a first switch 43 for switching an emulsion extracting switch 40; an emulsion return switch 37; a line washing switch 38; A second switch 44 for switching the return switch 39 and a third switch 45 for switching the air switch 36 are provided.
[0044]
The first switch 43 turns on the loading switch 33 when the mono lever 43a installed at the center is moved leftward, turns on the scatter switch 34 when moved upward, and moves the washing switch 35 on when moved rightward, and moves downward. And an emulsion extraction switch 40. Further, the first switch 43 is provided with a display section 43b that lights up when the switch is turned on above, and a display section 43c that lights up when the switch is turned on to the right. The second switch 44 is a switch in which the emulsion return switch 37 is turned on when the mono lever 44a installed at the center is moved upward, the line cleaning switch 38 is turned on when the mono lever 44a is moved rightward, and the cleaning liquid return switch 39 is turned on when moved downward. is there. The third switch 45 is a switch that turns on the air switch 36 when the mono lever 45a installed at the center is moved upward, and turns off the air switch 36 when the mono lever 45a is moved downward.
[0045]
In the above configuration, the loading switch 33 and the control circuit 46 constitute a loading control unit 47a. The spray switch 34 and the control circuit 46 constitute a spray control unit 47b. The cleaning switch 35 and the control circuit 46 constitute a cleaning control unit 47c. The emulsion extraction switch 40 and the control circuit 46 constitute an emulsion extraction control unit 47d. The line cleaning switch 38 and the control circuit 46 constitute a line cleaning controller 47e. The emulsion return switch 37 and the control circuit 46 constitute an emulsion return control unit 47f. The cleaning liquid return switch 39 and the control circuit 46 constitute a cleaning liquid return control unit 47g. The air switch 36 and the control circuit 46 constitute an air control unit 47h.
[0046]
Next, a method of spraying asphalt emulsion by the above-described emulsion spraying apparatus 21 will be described.
[0047]
First, the mono lever 43a of the first switch 43 installed in the switch box 32 shown in FIG. 5 is moved to the left, and the loading switch 33 shown in FIG. 4 is turned on. When the loading switch 33 is turned on, the second switching valve 28a and the fourth switching valve 30 interposed in the emulsion return path 14 are opened. At this time, the emulsion pump 16 is operated by an emulsion circulation switch (not shown) provided in the driver's seat. Due to the pressure of the emulsion pump 16, the asphalt emulsion enters the emulsion forward path 12 from the emulsion supply source 23 via the emulsion supply path 24, enters the emulsion return path 14 via the emulsion spray bar 13, and is inserted into the emulsion return path 14. The emulsion enters the emulsion tank 11 via the second switching valve 28a.
[0048]
Next, the mono lever 43a of the first switch 43 shown in FIG. 5 is moved upward, and the scatter switch 34 shown in FIG. 4 is turned on. When the spray switch 34 is turned on, the first switching valve 27a interposed in the emulsion outward path 12 is opened. At this time, the emulsion pump 16 is operated by an unillustrated emulsion circulation switch. By the pressure of the emulsion pump 16, the asphalt emulsion enters the emulsion forward path 12 from the emulsion tank 11, and reaches the emulsion spray bar 13 via the emulsion filter 15 and the emulsion pump 16 interposed in the emulsion forward path 12, and the emulsion spray bar. The asphalt emulsion is sprayed on the road surface 8 from a spray nozzle 13a built in the apparatus. At this time, a spraying method changeover switch (not shown) provided on the driver's seat is linked to start / stop, and a spraying amount changeover switch (not shown) provided on the driver's seat is linked to speed. As a result, the asphalt emulsion is sprayed only when the vehicle is moving, and the spray amount is automatically controlled in accordance with the speed of the vehicle.
[0049]
When the emulsion spraying is stopped, the mono lever 43a of the first switch 43 shown in FIG. 5 is moved upward to turn on the spraying switch 34 shown in FIG. 4, and the spraying method changeover switch and the spraying amount changeover switch (not shown) are turned off. At this time, the emulsion pump 16 is operated by an emulsion circulation switch (not shown), and an electric signal is sent from the emulsion control panel 42 to the relay 41 to open the second switching valve 28a interposed in the emulsion return path 14. I do. The asphalt emulsion enters the emulsion forward path 12 from the emulsion tank 11 by the pressure of the emulsion pump 16, reaches the emulsion return path 14 via the emulsion spray bar 13, and operates the second switching valve 28 a interposed in the emulsion return path 14. Then, the process returns to the emulsion tank 11. By circulating the asphalt emulsion in this way, solidification of the asphalt emulsion is prevented.
[0050]
Next, the case where the emulsion circulation path 17 is washed by the emulsion washing apparatus 22 will be described.
[0051]
First, the mono lever 43a of the first switch 43 shown in FIG. 5 is moved rightward, and the cleaning switch 35 shown in FIG. 4 is turned on. Next, the mono lever 44a of the second switch 44 is moved upward to turn on the emulsion return switch 37 shown in FIG. At this time, the emulsion pump 16 is operated by an emulsion circulation switch (not shown), and the mono lever 45a of the third switch 45 shown in FIG. 5 is moved upward to turn on the air switch 36 shown in FIG. The air switch 36 is turned on for a few seconds, and this is repeated a few times. When the emulsion return switch 37 is turned on, the second switching valve 28a provided in the emulsion return path 14 is opened, and when the air switch 36 is turned on, the fifth switching valve 31 is opened, and air is released. It flows into the emulsion circulation path 17. Due to the pressure of the air and the pressure of the emulsion pump 16, the asphalt emulsion in the emulsion circulation path 17 passes from the emulsion outward path 12 to the emulsion return path 14 via the emulsion spray bar 13, and is interposed in the emulsion return path 14. And enters the emulsion tank 11 via the switching valve 28a.
[0052]
Next, the mono-lever 43a of the first switch 43 shown in FIG. 5 is moved to the right, the cleaning switch 35 shown in FIG. 4 is turned on, and the mono-lever 44a of the second switch 44 is moved to the right, so that the line shown in FIG. The cleaning switch 38 is turned on. When the line cleaning switch 38 is turned on, the first switching valve 27b disposed in the cleaning liquid path 19, the second switching valve 28b and the third switching valve 29 disposed in the cleaning liquid pipe 19 are opened. become. At this time, the emulsion pump 16 is operated by an unillustrated emulsion circulation switch. Due to the pressure of the emulsion pump 16, the cleaning liquid stored in the cleaning liquid tank 18 passes through the cleaning liquid path 19 from the cleaning liquid tank 18 and passes through the first switching valve 27b interposed in the cleaning liquid path 19. It flows into the emulsion outward path 12.
[0053]
The washing liquid that has flowed into the emulsion outward path 12 reaches the emulsion return path 14 from the emulsion outward path 12 via the emulsion spray bar 13, and flows into the washing liquid pipe 19 connected to the emulsion return path 14. The cleaning liquid that has flowed into the cleaning liquid pipe 19 reaches the third switching valve 29 via the second switching valve 28 b provided in the cleaning liquid pipe 19, and passes through the third switching valve 29 to the cleaning liquid tank 18. Return to
[0054]
Next, the mono-lever 43a of the first switch 43 shown in FIG. 5 is moved rightward to turn on the cleaning switch 35 shown in FIG. 4, and the mono-lever 44a of the second switch 44 is moved downward to return the cleaning liquid shown in FIG. Switch 39 is turned on. At this time, the emulsion pump 16 is operated by an emulsion circulation switch (not shown), and the mono lever 45a of the third switch 45 shown in FIG. 5 is moved upward to turn on the air switch 36 shown in FIG. The air switch 36 is turned on for a few seconds, and this is repeated a few times.
[0055]
When the cleaning liquid return switch 39 is turned on, the second switching valve 28b and the third switching valve 29 provided in the cleaning liquid pipe 19 are opened, and when the air switch 36 is turned on, the fifth switching valve is turned on. 31 is opened, and air flows into the emulsion circulation path 17. Due to the pressure of the air and the pressure of the emulsion pump 16, the washing liquid in the emulsion circulation path 17 reaches the emulsion return path 14 from the emulsion forward path 12 via the emulsion spray bar 13, and flows into the washing liquid pipe 19 connected to the emulsion return path 14. I do. The cleaning liquid that has flowed into the cleaning liquid pipe 19 reaches a third switching valve 29 via a second switching valve 28 b provided in the cleaning liquid pipe 19, and passes through the third switching valve 29 to the cleaning liquid tank 18. Return to
[0056]
Next, the mono lever 43a of the first switch 43 shown in FIG. 5 is moved downward, and the emulsion extraction switch 40 shown in FIG. 4 is turned on. When the emulsion extraction switch 40 is turned on, the first switching valve 27a provided in the emulsion outward path 12 and the second switching valve 28b provided in the washing liquid pipe 19 are opened. At this time, the emulsion pump 16 is operated by an unillustrated emulsion circulation switch. By the pressure of the emulsion pump 16, the asphalt emulsion in the emulsion tank 11 enters the emulsion forward path 12 from the emulsion tank 11, reaches the emulsion return path 14 via the emulsion spray bar 13, and is connected to the washing liquid pipe 19 connected to the emulsion return path 14. Flows into. The asphalt emulsion flowing into the cleaning liquid pipe 19 reaches the discharge path 20 via the second switching valve 28b provided in the cleaning liquid pipe 19, and is discharged to the outside.
[0057]
Next, the mono lever 43a of the first switch 43 shown in FIG. 5 is moved to the center, and the spraying method changeover switch (not shown) is set to forced spraying. As a result, the asphalt emulsion is sprayed on the road surface 8 from the spray nozzle 13a built in the emulsion spray bar 13 regardless of whether the vehicle starts or stops. At this time, the mono lever 45a of the third switch 45 shown in FIG. 5 is moved upward to turn on the air switch 36 shown in FIG. The air switch 36 is turned on for a few seconds, and this is repeated a few times. When the air switch 36 is turned on, the fifth switching valve 31 is opened, and air flows into the emulsion outward path 12. The air reaches the emulsion spray bar 13 from the emulsion outward path 12, and is sprayed on the road surface 8 from the spray nozzle 13a built in the emulsion spray bar 13 to wash the spray nozzle 13a.
[0058]
As described above, the operation from loading of the asphalt emulsion to cleaning at the end of the operation is controlled by a plurality of switches provided for each operation installed in the driver's seat. Therefore, the circuit can be easily switched, the ejection of the asphalt emulsion to the outside due to an erroneous operation or the like can be prevented, and the circuit switching operation can be performed by a single driver in a short time.
[0059]
Although the embodiment according to the present invention has been described above, the emulsion spraying apparatus 21 of the present invention is not limited to the above-described embodiment, and can be appropriately applied without departing from the gist thereof. is there. For example, in the embodiment, the emulsion spraying device in the asphalt finisher with the emulsion spraying device has been described. However, the present invention is not limited to the type of vehicle and may be used for a distributor or the like. Further, in the embodiment, the first switching valve 27 includes a first switching valve 27a provided in the emulsion outward path 12 and a first switching valve 27b provided in the washing liquid path 19. , The second switching valve 28 comprises a second switching valve 28a provided in the emulsion return path 14 and a second switching valve 28b provided in the washing liquid pipe 19, respectively. One three-way solenoid valve may be used.
[0060]
【The invention's effect】
By automating the switching operation of the switching valve that controls a different flow path direction for each operation, and controlling the switching operation of the switching valve by the switch for each operation, the switching operation of the switching valve can be easily performed. It is possible to suppress erroneous operations such as forgetting or mistaken switching, and to switch the switching valve in a short time by one driver.
[Brief description of the drawings]
FIG. 1 is an overall side view of an asphalt finisher equipped with an emulsion spraying device according to the present invention.
FIG. 2 is an overall plan view of an asphalt finisher equipped with an emulsion spraying device according to the present invention.
FIG. 3 is a piping diagram of the emulsion spraying apparatus according to the present invention.
FIG. 4 is an electric circuit diagram of the emulsion spraying apparatus according to the present invention.
FIG. 5 is a plan view of a switching valve switch box of the emulsion spraying apparatus according to the present invention.
[Explanation of symbols]
11 Emulsion tank
12 Emulsion outbound
13 Emulsion spray bar
13a spray nozzle
14 Emulsion return
17 Emulsion circuit
18 Cleaning liquid tank
19 Cleaning solution path
20 discharge route
21 Emulsion sprayer
22 Emulsion cleaning equipment
23 Emulsion source
24 Emulsion supply path
25 Air supply source
26 Air supply path
27 First switching valve
28 Second switching valve
29 Third switching valve
30 Fourth switching valve
31 Fifth switching valve
33 Loading switch
34 scatter switch
35 Cleaning switch
36 Air switch
37 Emulsion return switch
38 Line wash switch
39 Cleaning liquid return switch
40 Emulsion extraction switch
43 1st switch
44 Second switch
45 3rd switch
47a loading control unit
47b spraying control unit
47c cleaning control unit
47d emulsion extraction control unit
47e line cleaning control unit
47f emulsion return control unit
47g cleaning liquid return control unit
47h air control unit

Claims (10)

An emulsion circulation path from the emulsion tank storing the emulsion to an emulsion spray bar containing a spray nozzle via an emulsion outward path, and returning the emulsion from the emulsion spray bar to the emulsion tank via an emulsion return path, and a branch from the emulsion return path. A cleaning liquid path that merges with the emulsion outward path via a cleaning liquid tank that stores the cleaning liquid, a first switching valve disposed at a junction where the cleaning liquid path merges with the emulsion outward path, and the cleaning liquid path includes the cleaning liquid path. An emulsion spraying device comprising: a second switching valve interposed at a branch portion branched from the emulsion return path;
The first switching valve and the second switching valve flow from the emulsion tank into the emulsion circulation path, and return to the emulsion tank via the first switching valve and the second switching valve. A spray control unit for controlling the switching of the flow direction of the emulsion. The emulsion spraying device according to claim 1,
A discharge path that branches from the cleaning liquid path to the front of the cleaning liquid tank and extends to the outside, a third switching valve disposed at a branch portion where the discharge path branches from the cleaning liquid path, and a cleaning liquid path extending from the cleaning liquid tank to the cleaning liquid path. And flows into the emulsion circulation path via the first switching valve, flows into the cleaning liquid path via the second switching valve, and flows through the cleaning liquid path via the third switching valve. An emulsion dispersing apparatus, comprising: a line washing control unit that controls switching of the flow direction of the first switching valve, the second switching valve, and the third switching valve so as to return to the tank. The emulsion spraying device according to claim 1 or 2,
The liquid flows from the emulsion tank into the emulsion circulation path, passes through the first switching valve, flows into the cleaning liquid path via the second switching valve, and exits through the third switching valve. An emulsion extraction control unit that controls switching of the flow direction of the first switching valve, the second switching valve, and the third switching valve so as to flow into the path and discharge to the outside from the discharge path. An emulsion spraying device, comprising: The emulsion spraying apparatus according to any one of claims 1 to 3, further comprising controlling the opening and closing of a fourth switching valve interposed in an emulsion supply path connected from the emulsion supply source to the emulsion outward path, and controlling the opening and closing of the second switching valve. An emulsion dispersing apparatus comprising an emulsion loading control unit for controlling opening and closing of a switching valve. The emulsion spraying device according to any one of claims 1 to 4, further comprising an air control unit configured to control opening and closing of a fifth switching valve interposed in an air supply path connected from the air supply source to the emulsion outward path. An emulsion spraying device characterized by the above-mentioned. 6. The emulsion dispersing apparatus according to claim 1, wherein a flow direction of said second switching valve is switched from said emulsion return path to said emulsion tank via said second switching valve. An emulsion spraying device comprising a return control unit. 7. The emulsion spraying device according to claim 2, wherein the emulsion returns to the cleaning liquid path via the second switching valve, and reaches the cleaning liquid tank via the third switching valve. The emulsion dispersing apparatus further includes a washing liquid return control unit for controlling the switching of the flow direction of the second switching valve and the third switching valve. The emulsion spraying device according to claim 7,
The emulsion dispersing apparatus, wherein the line cleaning control unit, the emulsion return control unit, and the cleaning liquid return control unit are connected to a power supply device via a cleaning control unit. The emulsion spraying device according to claim 8,
The emulsion spraying apparatus, wherein the emulsion loading control unit, the spraying control unit, the washing control unit, and the emulsion extracting control unit are respectively switched by a first monolever. The emulsion spraying device according to any one of claims 7 to 9,
The line spraying control unit, the emulsion return control unit, and the cleaning liquid return control unit are each switched by a second monolever.

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