JP3797958B2 - Emulsion sprayer in asphalt finisher with emulsion sprayer - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an emulsion spraying apparatus in an asphalt finisher equipped with an emulsion spraying apparatus that sprays an asphalt emulsion on a lower road surface on which an asphalt mixture is spread.
[0002]
[Prior art]
Conventionally, as an asphalt finisher equipped with an emulsion spraying device, a plurality of spray nozzles are provided at intervals in a spray bar disposed in the width direction of a traveling vehicle, and the spray bar is installed from the emulsion tank mounted on the traveling vehicle. The asphalt emulsion supplied to the hopper is sprinkled on the lower road surface such as an unpaved roadbed, asphalt pavement, or concrete pavement by the spray nozzle, and the asphalt mixture charged in the hopper is sent out by the delivery device. In order to prevent the asphalt emulsion from adhering to the spray nozzle and clogging of the spray nozzle, it is sent out on the sprayed asphalt emulsion and spread with a screed. A device that supplies cleaning air is known (see Japanese Patent Application Laid-Open No. 11-256511).
[0003]
[Problems to be solved by the invention]
However, in the asphalt finisher equipped with the emulsion spraying device, the spray nozzles simultaneously open and close the emulsion valve that opens and closes the flow path for supplying the asphalt emulsion from the spray bar into the spray nozzle. All spray nozzles that control the spraying of the emulsion onto the lower surface of the road are in a batch control system. If the spray width of the asphalt emulsion on the lower surface of the road changes, the asphalt emulsion is selectively sprayed from the required spray nozzle according to the width of the spray. I couldn't. For this reason, there has been a need for surplus emulsion recovery means for receiving the asphalt emulsion sprayed from the spray nozzle that does not need to be sprayed with respect to the spray width in a tray and returning it to the emulsion tank.
The circuit for supplying cleaning air to the spray nozzles from the compressed air supply source is provided with an open / close valve on the upstream side so that when the open / close valve is opened, the cleaning air is supplied to all the spray nozzles all at once. Therefore, cleaning air is supplied even to spray nozzles that do not require cleaning, and only the spray nozzles that need to be cleaned are selectively concentrated to send cleaning air to efficiently spread the spray nozzles. There was dissatisfaction that could not be cleaned.
[0004]
The present invention has been made in view of the above circumstances, and it is possible to appropriately spray an asphalt emulsion by selecting a spray nozzle corresponding to the spray width, and selectively and efficiently clean the necessary spray nozzle. An object of the present invention is to provide an emulsion dispersing apparatus in an asphalt finisher with an emulsion dispersing apparatus.
[0005]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a spray bar disposed in the width direction of a traveling vehicle with a plurality of spray nozzles spaced from each other, and the spray bar is disposed from an emulsion tank mounted on the traveling vehicle. In the asphalt finisher provided with the emulsion spraying device for spraying the asphalt emulsion supplied to the lower surface of the asphalt mixture by the spray nozzles, the spray nozzles are arranged in the spray nozzles from the spray bar. An emulsion valve which is individually opened and closed by the operation of an electromagnetic on-off valve for emulsion which is provided corresponding to each spray nozzle and is individually operated by an emulsion changeover switch, the flow path for supplying the cleaning air into said respective spray nozzle from the compressed air supply source mounted on the vehicle, corresponding individually to each spray nozzle It is characterized in that the cleaning valve is provided to open and close individually by the operation of the cleaning change-over switch kicked.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an emulsion dispersing apparatus for an asphalt finisher with an emulsion dispersing apparatus according to an embodiment of the present invention will be described with reference to the drawings.
1 and 2, reference numeral 1 denotes an asphalt finisher with an emulsion spraying device. This asphalt finisher 1 with an emulsion spraying device has a vehicle body 2 supported by front wheels (steering wheels) 2a and rear wheels (drive wheels) 2b, and travels by the power of an engine in a power unit 3 mounted on the vehicle body 2. a self-propelled vehicle (vehicles) 4, a hopper 5 for receiving a asphalt mixture which is provided at a front portion of the vehicle 4, a rear portion in the width direction of the vehicle body 2 of the vehicle 4 (the plane in FIG. 1 its front-rear direction to the vehicle body 2 between the vertical direction, a spreading screw (delivery device) 6 that is supported lifting toward the vertical direction) in FIG. 2, the bottom and the spray Proceedings chestnut Interview 6 of the hopper 5 to A bar feeder (delivery device) 7 provided along (the left and right direction in FIGS. 1 and 2) and a front end are rotatably supported on both sides in the center of the vehicle 4 in the front-rear direction, and the rear end is Can move up and down on the body 2 with the cylinder 8a , A screed 9 that is supported by the rear end of the leveling arm 8 and that can be turned up and down by a cylinder 8a and that can be expanded and contracted in the width direction of the vehicle 4, and an emulsion spraying device 10. And a driver's seat 12 having a control device 11. This configuration is basically the same as that of an asphalt finisher equipped with a conventional emulsion spraying device.
[0007]
Said emulsion spray apparatus 10 includes a emulsion tank 13 mounted on top of the central definitive before the rear direction of the vehicle body 2, is installed at one side lower portion of the center in the longitudinal direction of the vehicle body 2, the asphalt emulsion in the emulsion tank 13 Emulsion pump 14 for sucking the oil through emulsion pipe n (see FIGS. 3 and 4) and the emulsion pump 14 supported by the vehicle body 2 at the rear of the rear wheel 2b and in front of the spreading screw 6. An emulsion distribution mechanism 15 that distributes asphalt emulsion supplied through the emulsion pipe n (see FIGS. 3 and 4) to the lower road surface, and the emulsion distribution mechanism that is installed on the other side of the center of the vehicle body 2 in the front-rear direction. Compressor (compressed air supply source) 16 for supplying cleaning air (compressed air) to 15, and control device 1 for controlling the supply of asphalt emulsion and cleaning air to the emulsion spraying mechanism 15 And a (see FIG. 3).
[0008]
As shown in FIGS. 3 and 4, the emulsion spraying mechanism 15 includes a rectangular cylindrical spray bar 18 extending along the width direction of the vehicle 4, and the longitudinal direction of the spray bar 18 (the width direction of the vehicle 4). And a plurality of spray nozzles 19 attached to the lower part of the spray bar 18 at a predetermined interval, and an emulsion valve 21 for opening and closing a flow path 20 for supplying the asphalt emulsion from the spray bar 18 to the spray nozzle 19. Yes.
The spray nozzle 19 has a nozzle 23 attached to the lower end of a nozzle body 22, is fixed to the spray bar 18 by passing it up and down, and communicates with the inside of the spray bar 18 through a through hole 24a. The nozzle body 22 is connected to the lower end of 24.
[0009]
Further, an air pipe a from the compressor 16 is connected to a side portion of the nozzle body 22 so as to communicate with the inside 22 a of the nozzle body 22. The emulsion valve 21 includes a conical valve body 21b below a valve shaft 21a inserted into the support cylinder 24, and the valve shaft 21a is in an air cylinder 21c fixed to the upper end of the support cylinder 24. It is connected to the piston. An air pipe a from the compressor 16 is connected to the air cylinder 21c, and when compressed air is supplied into the air cylinder 21c, the nozzle is pressed by a piston that is constantly pressed downward by a biasing force of a spring. The valve body 21b that is in contact with the valve seat 22c at the upper end of the sleeve 22b mounted inside the main body 22 is pushed upward to connect the inside of the spray bar 18 and the inside 22a of the nozzle main body 22 with each other. When the supply of compressed air to the air cylinder 21c is stopped, the valve body 21b descends and comes into contact with the valve seat 22c, whereby the flow path 20 is closed.
[0010]
The control device 17 is provided with an emulsion electromagnetic opening / closing valve 25 corresponding to each emulsion valve 21 of each spraying nozzle 19 in the emulsion spraying mechanism 15, and each emulsion electromagnetic switching valve 25 is provided in the control device. These are individually operated by an emulsion changeover switch 26 that is selectively operated via an operation switch (not shown) provided. When the emulsion changeover switch 26 is ON, the valve is opened, and compressed air from the compressor 16 is opened. Is supplied to the air cylinder 21c of the emulsion valve 21, the valve body 21b is raised and the flow path 20 is opened, and the valve is closed when the emulsion changeover switch 26 is OFF, and the emulsion is fed from the compressor 16 to the emulsion. The supply of compressed air to the air cylinder 21c of the valve 21 is stopped, the valve body 21b is lowered, and the flow path 20 is closed.
[0011]
Further, the control device 17 is provided with a cleaning electromagnetic opening / closing valve (cleaning valve) 27 corresponding to each spraying nozzle 19 in the emulsion spraying mechanism 15, and each cleaning electromagnetic switching valve 27 is controlled. Individually operated by a cleaning changeover switch 28 that is selectively operated via an operation switch (not shown) provided in the apparatus, and when the cleaning changeover switch 28 is ON, the valve is opened, Cleaning air is supplied to the inside 22a of the nozzle body 22 of the spray nozzle 19 to clean the inside of the nozzle 23. When the cleaning changeover switch 28 is OFF, the valve is opened and the emulsion valve 21 is supplied from the compressor 16 to the emulsion valve 21. The supply of the cleaning air to the interior 22a of the nozzle body 22 is stopped, and the air cleaning in the nozzle 23 is stopped.
The emulsion electromagnetic on-off valves 25 and the washing electromagnetic on-off valves 27 are combined into one electromagnetic valve block, or are combined into individual electromagnetic valve blocks, and the emulsion pump 14, the compressor 16, or the spray bar. It is installed on the vehicle body 2 near 18 or attached to the spray bar 18.
[0012]
Further, although not shown, the control device 17 has an operation time timer for setting an operation time (a supply time of the cleaning air to the spray nozzle 19) from the ON operation to the OFF operation of the cleaning changeover switch 28, and a cleaning device. A cycle timer for setting a cycle in which the changeover switch 28 is turned on, a cleaning cycle setter 29 for changing and adjusting the cycle of the cycle timer, and the operation time timer and the cycle timer are operated to automatically perform air cleaning. equipped with an automatic cleaning change-over switch 30 for selecting whether or not to perform, the automatic cleaning changeover switch 30 at the time of oN operation, the cleaning solenoid valve 27 is periodically opened and closed, cleaning the spray nozzles 19 Air is supplied, and the spray nozzle 19 is cleaned with air at a cycle determined by the cleaning cycle setter 29.
[0013]
Next, the operation of the emulsion spraying device 10 of the asphalt finisher with emulsion spraying device according to the above embodiment will be described.
When paving the road with the asphalt finisher 1 with emulsion spraying device, the start switch of the control device 11 is operated to make the asphalt finisher 1 with emulsion spraying device operable, and then the vehicle 4 is moved forward. When the pavement operation is started, each emulsion changeover switch 26 is turned ON in response to a command from the control device 17 to open each emulsion electromagnetic on-off valve 25, and compressed air is supplied from the compressor 16 to each emulsion valve 21 of the emulsion spraying mechanism 15. Since each emulsion valve 21 is opened by being sent to the air cylinder 21 c, the asphalt emulsion sent from the emulsion tank 13 to the spray bar 18 passes through the through hole 24 a of the support cylinder 24 and the flow path 20 to the nozzle 23. It is sprayed on the lower surface F of the road to be paved from the tip. Then, the asphalt mixture put in the hopper 5 of the vehicle 4 is sent to the front of the spreading screw 6 by the bar feeder 7 and dropped onto the lower road surface F on which the asphalt emulsion is dispersed, and the spreading screw. 6, the asphalt composite material spread in the width direction of the vehicle 4 and spread on the lower road surface F is spread by the screed 9.
[0014]
In this paving operation, for example, when the road width to be paved becomes narrow and it becomes unnecessary to spray the asphalt emulsion from all the spray nozzles 19 over the entire length of the spray bar 18, an operation switch (not shown) of the control device 17 is used. When the emulsion changeover switch 26 corresponding to the spraying nozzles 19 (necessary number of spraying nozzles located on both sides of the spray bar 18) 19 which are no longer required for spraying is individually selected and turned off. The emulsion electromagnetic open / close valve 25 corresponding to the emulsion changeover switch 26 is closed, the air supply from the compressor 16 to the air cylinder 21c of the selected emulsion valve 21 is stopped, and the emulsion valve 21 is closed to spray. Supply of asphalt emulsion from the bar 18 to the nozzle 23 in the spray nozzle 19 that does not require spraying is stopped. Thereby, useless consumption of the asphalt emulsion can be eliminated.
[0015]
Although an example in which one spray bar 18 is provided along the width direction of the vehicle 4 has been described above, the spray bar 18 is usually provided with a pair of sprays provided with a position shifted in the front-rear direction of the vehicle 4. The bar is configured as an expandable / contractible spray bar configured to move relatively in the width direction of the vehicle 4. In this case, when the spray bar is expanded and contracted according to the width of the road to be paved, the front and rear spray bars are overlapped at the center in the width direction of the vehicle 4, and the asphalt emulsion is overlapped on this part. Therefore, asphalt emulsion spraying from the spray nozzle 19 of one spray bar corresponding to the overlapping portion is selectively stopped in the same manner as described above, so that surplus asphalt emulsion is sprayed on the lower road surface F. by Ru can be prevented. For this reason, it is not necessary to provide a surplus emulsion collecting means for receiving the surplus asphalt emulsion in the receiving tray and collecting it in the emulsion tank 13 as in the prior art.
[0016]
Next, when a problem occurs in which the emulsion adheres to the nozzle 23 of the spray nozzle 19 of the emulsion spraying mechanism 15 and the spray angle becomes narrow by continuing the paving work for a long time, When the control device 17 operates an operation switch (not shown) or the like to individually select the cleaning changeover switch 28 corresponding to the spray nozzle 19 in which a problem has occurred and perform an ON operation, the selected cleaning changeover switch 28 is selected. Therefore, the air is supplied from the compressor 16 to the interior 22a of the nozzle body 22 of the spray nozzle 19 selected, and the cleaning air is strongly jetted from the nozzle 23. It can be performed 22a and asphalt emulsion adhering to the nozzle 23 the entire air cleaning of the spray nozzles 19 which are selected are discharged to the outside at the same time .
Accordingly, the spray nozzle 19 can be preferentially air-washed by concentrating only on the spray nozzle 19 clogged with the asphalt emulsion, and the spray nozzle 19 can be preferentially air-cleaned, and the air cleaning work can be performed efficiently. Can do.
[0017]
In addition to the above air cleaning, when the automatic cleaning changeover switch 30 is turned on in the control device 17, the operation time timer and the cycle timer in the control device 17 operate, and the cleaning cycle setting device 29. All the electromagnetic on-off valves 27 for cleaning are operated at the time period set by the period timer, for example, at a time interval until the pavement advances by a predetermined distance. Opening all at once for a predetermined time set in the timer, the cleaning air is sent from the compressor 16 to all the spray nozzles 19 and the spray nozzles 19 are automatically cleaned with air. It goes without saying that the paving operation is interrupted when this automatic air cleaning is performed.
[0018]
In this way, all the spray nozzles 19 attached to the spray bar 18 are periodically (automatically) and automatically cleaned by air so that all the spray nozzles 19 have an asphalt spray angle of the nozzle 23. Therefore, a uniform asphalt emulsion can always be dispersed without being narrowed. For this reason, it is not necessary for the operator of the machine to constantly monitor the state of spraying of the asphalt emulsion from the spray nozzle 19 and find the clog of the spray nozzle 19 during the paving work, thereby reducing the burden on the operator. can do.
[0019]
【The invention's effect】
As described above, according to the emulsion spraying apparatus of the asphalt finisher with an emulsion spraying apparatus according to the present invention, a plurality of spraying nozzles attached to the spray bar of the emulsion spraying mechanism are provided from the spray bar into each spray nozzle. An emulsion valve for individually opening and closing a flow path for supplying the emulsion, which is provided corresponding to each spray nozzle and operated individually by an emulsion changeover switch, and a compressed air supply source has a configuration that includes a flush valve for opening and closing individually by said supplying passage cleaning air in each spray nozzle, the operation of the cleaning change-over switch provided corresponding individually to each of the spray nozzle from since, by selectively opening and closing the emulsion valve by operation of the emulsion for solenoid valves by emulsion change-over switch, by the road width to be paved asphalt To be able to spray the belt emulsion stop sprayed select unnecessary spraying nozzles suitably, it is possible to eliminate wasteful consumption of bitumen emulsion.
[0020]
If the emulsion spraying mechanism has a spray bar that expands and contracts in the width direction of the vehicle, select the spray nozzle of one spray bar in the overlapping part of the spray bar according to the pavement width, and select the spray nozzle from the selected spray nozzle. Therefore, it is necessary to provide a surplus emulsion collecting means for collecting the surplus asphalt emulsion sprayed from the spray nozzle of one spray bar in the overlapping portion to the emulsion tank as in the prior art. Absent.
In addition, by selectively opening and closing the cleaning valve using the cleaning switch , cleaning air can be supplied to multiple spray nozzles individually, so select the spray nozzle that requires air cleaning and concentrate on it. Then, cleaning air can be sent to efficiently perform air cleaning.
[Brief description of the drawings]
FIG. 1 is a side view showing an asphalt finisher with an emulsion spraying device provided with an emulsion spraying device according to an embodiment of the present invention.
FIG. 2 is also a plan view.
FIG. 3 is a system diagram showing an emulsion spraying apparatus in an asphalt finisher with an emulsion spraying apparatus according to an embodiment of the present invention.
FIG. 4 is a longitudinal sectional view showing a spray nozzle portion of the emulsion spray apparatus.
[Explanation of symbols]
1 Asphalt finisher with emulsion sprayer 2 Body 4 Vehicle (traveling vehicle)
5 Hopper 6 Spreading screw 7 Bar feeder 9 Screed 10 Emulsion spraying device 13 Emulsion tank 14 Emulsion pump 15 Emulsion spraying mechanism 16 Compressor (compressed air supply source)
17 Control device 18 Spray bar 19 Spray nozzle 20 Flow path 21 Emulsion valve 21b Valve body 21c Air cylinder 22 Nozzle body 23 Nozzle 25 Emulsion electromagnetic open / close valve 26 Emulsion changeover switch 27 Washing electromagnetic open / close valve (cleaning valve)
28 Cleaning selector switch 29 Cleaning cycle setter 30 Automatic cleaning switch

Claims (1)

A plurality of spray nozzles are provided at intervals in a spray bar arranged in the width direction of the traveling vehicle, and asphalt emulsion supplied to the spray bar from an emulsion tank mounted on the traveling vehicle is mixed with asphalt mixture. In the asphalt finisher equipped with the emulsion spraying device sprayed by each spray nozzle on the lower level road surface to be spread,
Each spray nozzle is provided with a flow path for supplying asphalt emulsion from the spray bar into each spray nozzle , corresponding to each spray nozzle and individually operated by an emulsion changeover switch. the emulsion valves individually opened and closed by operation of the valve, a flow path for supplying the cleaning air into said respective spray nozzle from the compressed air supply source mounted on the traveling vehicle, provided corresponding individually to each spray nozzle And an asphalt finisher emulsion spraying device with an emulsion spraying device, wherein the cleaning valve is individually opened and closed by the operation of the cleaning switch .

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