JP3416838B2 - Asphalt emulsion spraying machine - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an asphalt emulsion spraying machine dedicated to emulsion spraying for spreading an asphalt emulsion on a lower road surface, and a combination of asphalt emulsion spraying with other functions such as leveling an asphalt mixture. It relates to an asphalt emulsion spraying machine.

[0002]

2. Description of the Related Art An asphalt compounding machine for laying asphalt mixture on an unpaved roadbed, an asphalt pavement or its cutting surface, or a lower road surface of a concrete pavement is used as a leveling machine such as an asphalt finisher, repaver or remixer. A hopper for containing the material, a delivery device for the asphalt mixture, an emulsion spraying device for spraying the asphalt emulsion,
A screed is provided, and while asphalt emulsion is sprayed on the lower road surface by an emulsion spraying device, the asphalt mixture is sent from the hopper onto the sprayed emulsion on the lower road surface, sent out by the device and spread by the screed. (JP-A-4-203006, US Pat. No. 5,069,5)
No. 78). There is also known an asphalt distributor dedicated to emulsion spraying, in which a traveling vehicle is equipped only with an emulsion spraying device and an asphalt emulsion is sprayed on a lower road surface (JP-B-11-11775). The emulsion spraying device applied to such a machine is provided with a plurality of nozzles for spraying the asphalt emulsion supplied from the emulsion tank, and all the nozzles spray the asphalt emulsion at the same constant spray amount. It has become.

[0003]

As described above, in the conventional apparatus in which all the nozzles eject the asphalt emulsion with the same constant injection amount, it is necessary to change the injection amount of the asphalt emulsion. In that case, there is a problem in that it is necessary to replace the nozzle with a type having a different injection amount, which requires a great deal of labor. Therefore, an object of the present invention is to provide an asphalt emulsion spraying machine capable of changing the injection amount of asphalt emulsion without complicated work.

[0004]

In order to achieve the above object, an asphalt emulsion spraying machine according to a first aspect of the present invention comprises a traveling vehicle provided with a nozzle for injecting an asphalt emulsion. In addition, a plurality of types of nozzles having different jetting amounts and a switching means for selectively switching the type of the nozzle for jetting the asphalt emulsion are provided.

The asphalt emulsion spraying machine according to a second aspect of the present invention is characterized in that the plurality of types of nozzles have different injection amounts due to the difference in the diameter of the ejection port for ejecting the asphalt emulsion.

The asphalt emulsion spraying machine according to a third aspect of the present invention is characterized in that the switching means opens and closes the nozzle.

In the asphalt emulsion spraying machine according to a fourth aspect of the present invention, the asphalt mixture is sent from the nozzle of the traveling vehicle to the lower part of the road surface, and the asphalt mixture is sent to the lower road surface. A screed for laying and leveling the asphalt mixture sent out onto the lower road surface by the sending-out device is provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described based on examples with reference to the drawings. 1 to 5 show an embodiment of an asphalt emulsion spraying machine according to the present invention. This asphalt emulsion spraying machine is an asphalt finisher that spreads the asphalt emulsion and spreads the asphalt mix. The self-propelled traveling vehicle 1 has a hopper 2 for storing the asphalt mix and a delivery of the asphalt mix. An asphalt emulsion is provided with a sushi device 3, a pair of spray bars 4A and 4B that are elastically divided into left and right, front and rear, and a pair of screeds 5A and 5B that are elastically divided into left, right, and front and rear. Spray bar 4A, 4B
While spraying on the unpaved roadbed 6 as the lower road surface,
The asphalt mixture is sent from the hopper 2 onto the sprayed emulsion on the roadbed 6, sent out by the device 3, and spread by the screeds 5A and 5B.

The delivery device 3 includes a bar feeder 3a for carrying out the asphalt mixture from the hopper 2, and a bar feeder 3
Asphalt mixture carried by a.
And a spreading screw (sending part) 3b which spreads out in the width direction and is sent out onto the roadbed 6. Spray bar 4
As described above, the left and right pair of the A and 4B and the screeds 5A and 5B are supported by the vehicle 1 with their positions shifted in parallel to the front and rear of the traveling direction of the traveling vehicle 1, and the width direction of the vehicle 1 It is provided so as to be expandable and contractible in the left-right direction, and the dispersion width of the emulsion and the spread width of the asphalt mixture A can be arbitrarily adjusted. Illustrated vehicle 1
Is a crawler type, but there is also a wheel type.

Each of the spray bars 4A and 4B has a duct structure and is provided immediately in front of the spreading screw 3b. Also, immediately before each of the spray bars 4A and 4B, a pair of duct structures is provided so as to be expandable and contractable in the left and right directions. Suction devices 10A and 10B are provided. Each suction device 10
A and 10B are for removing the moisture of the roadbed 6 by suction from a large number of nozzle openings on the lower surface, and although not shown, they are connected to a cyclone type water-water separator by a flexible suction hose and connected to a recovery tank. It is connected.

Like the spray bars 4A and 4B, the suction devices 10A and 10B are supported by the vehicle 1 such that a pair of left and right are displaced from each other in the forward and backward direction of the traveling direction of the traveling vehicle 1 and are supported by the vehicle 1. It is provided so that it can expand and contract in any direction. The outer ends of the spray bars 4A, 4B and the suction devices 10A, 10B are located at the side plates 8 of the screeds 5A, 5B.
It is connected to (not shown in FIG. 1) and is supported by the traveling vehicle 1, and has a structure in which the screeds 5A and 5B are expanded and contracted together when the screeds 5A and 5B are expanded and contracted. Spray bar 4
A, 4B, screed 5A, 5B, suction device 10A, 1
OB may be individually expanded and contracted.

Next, the spray bars 4A, 4B and the like will be described in more detail with reference to FIGS. In the traveling vehicle 1, a support member 12 having a U-shaped cross section, which is provided with support plate portions 11 extending in the left-right direction and extending downward at both ends in the front-rear direction, is suspended and supported via a support tool 12A. A plurality of pairs of support rollers 13 each having a pair of inside and outside are provided on both support plate portions 11 of the support member 12 at appropriate intervals in the left-right direction. Further, the support shafts 12B and 12B fixed to both support plate portions 11 are provided so as to be rotatable in the left-right direction in the traveling direction of the traveling vehicle 1. Then, each of the inner supporting rollers 13 engages with the grooves by the upper and lower ridges of the slide member 14 extending in the left-right direction of the traveling vehicle 1 so as to be movable substantially horizontally only in the left-right direction. The slide member 14 is supported, and the slide member 14
A spray bar 4A extending in the left-right direction is fixed to the lower part of the via a connecting piece 14A. In addition, the support member 12
An outer support roller 13 provided on the rear side supports a rear slide member 15 extending in the left-right direction of the traveling vehicle 1 so as to be movable only in the left-right direction. An outer support roller 13 provided on the front side supports a front slide member 16 extending in the left-right direction so as to be movable substantially horizontally only in the left-right direction.

Below the slide member 15 on the rear side, the spray bar 4B is arranged in parallel with the spray bar 4A on the front side in the lengthwise direction, and the spray bar 4B is displaced to the rear side and the connecting member 17 is provided.
Is fixed through. Spray bar 4B behind this
The connecting member 18 is fixed to the connecting member 18, and between the connecting member 18 and the connecting member 19 fixed to the slide member 16 on the front side, a rectangular parallelepiped recovery box (receiving member) 20 having an open top is fixed. Has been done. As a result, the rear slide member 15, the connecting member 17, and the rear spray bar 4 are provided.
B, the connecting member 18, the recovery box 20, the connecting member 19 and the front slide member 16 are integrally formed.
Each of the spray bars 4A and 4B has a first nozzle 4 and a second nozzle 4 having different nozzle diameters along the lengthwise direction.
A plurality of pairs of 0 and 41 are arranged at equal intervals and are attached with the ejection direction facing downward.

Each of the spray bars 4A and 4B has a duct structure, and the inside thereof is connected to the emulsion tank 22 by an introducing pipe 23 as shown in FIG. Then, with the spray pump 24 provided in the introduction pipe 23,
The asphalt emulsion sucked from the emulsion tank 22 through the filter 23A is introduced into each of the spray bars 4A and 4B, so that the first and second nozzles 40 communicating with the inside of each of the spray bars 4A and 4B. , 41 to eject asphalt emulsion. The nozzles 40 and 41 are provided with first and second opening / closing cylinders (switching means) 40a and 4 for switching the opening and closing of the nozzles.
1a are provided respectively.

The first opening / closing cylinder 40a of the first nozzle 40 having the same diameter is driven by air pressure, and the first switching valve (switching means) 43 causes one of the air compressor (switching means) 42 to move to one side. When the air pressure is introduced into the chamber and the air pressure is released from the other chamber, the ejection port of the first nozzle 40 is closed, and conversely, the air pressure is released from the one chamber and the other by the first switching valve 43. When the air pressure is introduced into the chamber, the ejection port of the first nozzle 40 is opened. Similarly, in the second opening / closing cylinder 41a of the second nozzle 41 having the same diameter, air pressure is introduced from the air compressor 42 into one chamber and air pressure is supplied from the other chamber by the second switching valve (switching means) 44. When it is released, the ejection port of the second nozzle 41 is closed, and conversely, when air pressure is released from the one chamber and air pressure is introduced into the other chamber by the second switching valve 44, the second nozzle is released. It is designed to open the nozzle 41.

The above-mentioned recovery box 20 is provided for the front spray bar 4A, and the front spray bar 4A at the portion where the spray bar 4A overlaps the rear spray bar 4B in the longitudinal direction. First,
By being arranged to face the second nozzles 40, 41, the first and second nozzles 40,
It is designed to receive the asphalt emulsion ejected from No. 41. Here, the collection box 20 has the same length as the rear spray bar 4B, and the position in the width direction (horizontal direction) of the traveling vehicle 1 is matched with that of the spray bar 4B as described above. It is fixed to the spray bar 4B on the rear side. This allows each spray bar 4
Regardless of the relative movement positions of A and 4B, it always receives the asphalt emulsion ejected from the nozzles 40 and 41 in the portion of the front spray bar 4A overlapping the rear spray bar 4B. .

A surplus recovery pipe 27 is connected to the bottom surface of the recovery box 20. The surplus recovery pipe 27 communicates with the emulsion tank 22, and the surplus recovery pump 28 provided on the way filters the emulsion in the recovery box 20 into a filter 27A.
It is designed to be sucked via the and returned to the emulsion tank 22.

Here, the spray pump 24 and the surplus recovery pump 28 are hydraulically driven pumps, and are rotated by hydraulic oil supplied from a hydraulic pump 47 driven by a diesel engine 46. The diesel engine 46 also includes a hot oil pump 48 that circulates hot oil.
The recovery box 20 is provided with a heater 29, which is an oil jacket for heating the received asphalt emulsion with the hot oil, on the bottom surface, the periphery, or both of them. The working oil and the hot oil are shared, and therefore, the oil tank 49 for storing the same is also shared. The heater 29 may be formed of a flexible pipe arranged inside the collection box 20. Further, the diesel engine 46 is the generator 5
1 also drives the electric power generated by the generator 51 to heat the asphalt emulsion in the emulsion tank 22 with the electric heater 52 and the oil in the oil tank 49 with the electric heater 53. . In FIG. 5, reference numeral 31 designates both nozzles 40 and 4 so as to stop emulsion dispersion.
In the state where 1 is closed, there is a circulation pipe for circulating the asphalt emulsion in order to maintain the fluidity, and in the middle thereof is opened during the circulation of the asphalt emulsion,
An open / close valve 32 that is closed at other times is provided. The on-off valve 32 is operated by compressed air supplied from an air compressor 42.

In the asphalt finisher described above, all the one nozzles 40 are opened by the first switching valve 43 and all the other nozzles 41 are closed by the second switching valve 44 during the work. , The delivery device 3, the spray pump 24, and the excess recovery pump 28.
When the traveling vehicle 1 travels forward as well as activating, the asphalt emulsion is sucked from the emulsion tank 22 by the spray pump 24 and is supplied to each spray bar 4A, 4B through the introduction pipe 23. The asphalt emulsion is sprayed from the nozzle 40 of one of the spray bars 4A and 4B onto the roadbed 6, and the asphalt mixture sent from the hopper 2 to the rear of the traveling vehicle 1 by the bar feeder 3a is spread by the spreading screw 3b. Due to
The asphalt pavement is spread on the dispersed asphalt emulsion, spread by the screws 5A and 5B, and asphalt pavement is constructed on the roadbed 6. At this time, when the screeds 5A and 5B are expanded and contracted in the width direction of the traveling vehicle 1 in accordance with the required pavement width, the spray bars 4A and 4B are also expanded and contracted in the same direction as the screeds 5A and 5B to spread the asphalt emulsion. The width is changed and adjusted. In the above, by adjusting the spray width, the spray bar 4 on the rear side of the spray bar 4A on the front side is adjusted.
The asphalt emulsion ejected from the first nozzle 40 having an overlapping portion with respect to B is received by the recovery box 20, and returned to the emulsion tank 22 by the excess recovery pump 28 via the excess recovery pipe 27. In the above, the asphalt emulsion supplied to each spray bar 4A, 4B is
Only one of the nozzles 40 having the same diameter is sprayed on the roadbed 6 in an injection amount corresponding to the diameter of the jet outlet. When changing the injection amount, all the first nozzles 40 are closed by the first switching valve 43, all the second nozzles 41 are opened by the second switching valve 44, and the spray pump 24 When the asphalt emulsion is supplied to each of the spray bars 4A and 4B with the above, a plurality of second nozzles 41 having the same diameter as the first nozzle 40 are provided.
As a result, the asphalt emulsion is sprayed on the roadbed 6 in an injection amount corresponding to the diameter of the ejection port.

As described above, the two types of the first and second nozzles 40, 40, which have different injection amounts due to the different diameters of the ejection ports,
41 and the type of nozzle for ejecting the asphalt emulsion, that is, the first nozzle 40 or the first nozzle 40.
Nozzle 40 of the second nozzle 4 having a different outlet diameter
Since it has an air compressor 42 for selectively switching between 1 and 2, first and second switching valves 43 and 44, and first and second opening / closing cylinders 40a and 41a, the injection amount of asphalt emulsion Even when it is necessary to change the air compressor 42, the air compressor 42 and the switching valves 43, 44
And the first and second nozzles 40 and 4 for injecting the asphalt emulsion by the first and second opening / closing cylinders 40a and 41a.
It is possible to change the injection amount of the asphalt emulsion by switching the type 1, so that the injection amount of the asphalt emulsion can be easily carried out without the troublesome work of replacing the nozzle with a different type of injection amount. Can be changed. Further, the switching of the types of the first and second nozzles 40 and 41 for injecting the asphalt emulsion is performed by the first and second nozzles.
It is performed by opening and closing the first and second nozzles 40 and 41 by the opening and closing cylinders 40a and 41a of the first and second nozzles 40 and 41, respectively.
Emulsion route other than the nozzles 40 and 41 of the emulsion tank 22
To each spray bar 4A, 4B can be shared.

In the above description, the case where the two types of the first and second nozzles 40 and 41 having different injection amounts are switched has been described as an example, but the switching is also possible when switching three or more types of nozzles having different injection amounts. This can be dealt with by increasing the number of valves and nozzles. In the above, when the work is temporarily stopped, the first and second switching valves 43 and 44
By switching the first and second opening / closing cylinders 4
0a, 41a through all the first and second nozzles 40,
When 41 is closed and the opening / closing valve 32 of the circulation pipe 31 is opened, the spray pump 24 causes the spray bars 4A, 4
The asphalt emulsion supplied to B is returned to the emulsion tank 22 through the circulation pipe without being sprayed on the roadbed 6, and the emulsion tank 22 and each spray bar 4
It circulates between A and 4B. Therefore, when the asphalt emulsion is stopped from being sprayed on the roadbed 6, the introduction pipe 23,
The inconvenience that the fluidity is reduced by staying inside the spray bars 4A, 4B and the like is eliminated. Further, in the above embodiment, the recovery box 2 is provided on the spray bar 4B on the rear side.
0 is provided to collect the excess asphalt emulsion from the front spray bar 4A, but the recovery box 20 is provided in the front spray bar 4A to provide the asphalt from the rear spray bar 4B. You may make it collect the surplus of an emulsion. In addition, as long as it spreads the asphalt emulsion, it can be applied to a leveling machine other than the asphalt finisher, for example, a repaver or a remixer, and of course, it can be applied to a machine dedicated to the spraying of the asphalt emulsion. You can

[0022]

As described above, in the asphalt emulsion spraying machine according to the present invention, by providing a plurality of types of nozzles having different injection amounts and switching means for switching the type of nozzles for injecting the asphalt emulsion, Even when it is necessary to change the injection amount of asphalt emulsion, the injection amount of asphalt emulsion can be changed by switching the type of nozzle that ejects the asphalt emulsion with the switching means. It is possible to easily change the injection amount of the asphalt emulsion without the complicated work of exchanging it with a different type.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of an asphalt emulsion spraying machine according to the present invention.

2 is a plan view of the asphalt emulsion spraying machine of FIG. 1. FIG.

FIG. 3 is a perspective view showing a spray bar.

FIG. 4 is a cross-sectional view showing a spray bar and a recovery device.

FIG. 5 is a piping diagram showing a system for spraying and collecting asphalt emulsion.

[Explanation of symbols]

1 traveling vehicle 3 sending device 3b Spreading screw (delivery part) 4A, 4B spray bar 5A, 5B screed 6 roadbed 40, 41 nozzles 40a, 41a open / close cylinder (switching means) 42 Air compressor (switching means) 43,44 Switching valve (switching means)

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Publication 6-104963 (JP, B2) Actual Public Publication 2-18095 (JP, Y2) Actual Public Publication 4-47217 (JP, Y2) Actual Publication 6- 47929 (JP, Y2) Patent 2541874 (JP, B2) (58) Fields investigated (Int.Cl. ⁷ , DB name) E01C 19/16 E01C 19/12 E01C 19/48 E01C 19/21

Claims (4)

(57) [Claims] 1. In an asphalt emulsion spraying machine in which a traveling vehicle is provided with a nozzle for injecting an asphalt emulsion, a switch for selectively switching a plurality of types of nozzles having different injection amounts and a type of a nozzle for injecting the asphalt emulsion. And an asphalt emulsion spraying machine. 2. The asphalt emulsion spraying machine according to claim 1, wherein the plurality of types of nozzles have different injection amounts depending on the difference in the diameter of the ejection port for ejecting the asphalt emulsion. 3. The asphalt emulsion spraying machine according to claim 1 or 2, wherein the switching means opens and closes the nozzle. 4. The delivery part of the delivery device for delivering the asphalt mixture from the delivery part to the lower road surface behind the nozzle of the traveling vehicle, and the asphalt mixture to the lower road surface by the delivery device. The asphalt emulsion spraying machine according to any one of claims 1 to 3, further comprising a screed for laying and spreading the asphalt mixture.