JPH1072805A - Asphalt emulsion spraying machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a spraying machine wherein spray density can be made uniform without complicated adjustment working even if the spraying width of asphalt emulsion is modified. SOLUTION: In this asphalt emulsion spraying machine, a collector 30 collecting asphalt emulsion jetted from a nozzle 21 at a part overlapped to the other spray bar 4B is provided. Thereby even if the spraying width of asphalt emulsion is modified, spray density can be kept constant without closing the nozzle 21 at the part where the spray bar 4A overlaps with the spray bar 4B by collecting an excess part by the collector 30.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention combines an asphalt emulsion spraying machine dedicated to spraying an asphalt emulsion onto a lower road surface, and other functions such as spreading an asphalt mixture to an asphalt emulsion spray. The present invention relates to an asphalt emulsion spraying machine.

[0002]

2. Description of the Related Art Asphalt finishers, repavers, remixers, etc. are used as asphalt finishers, repavers or remixers to spread an asphalt mixture on an unpaved roadbed, an asphalt pavement, its cut surface, or a lower pavement such as a concrete pavement. A hopper containing asphalt mixture, an asphalt mixture delivery device, an emulsion dispersing device for dispersing asphalt emulsion, and a screed are provided, and while the asphalt emulsion is dispensed on the lower road surface by the emulsion dispersing device, the hopper is (Japanese Patent Application Laid-Open No. Hei 4-203006, U.S. Pat. No. 5,062) discloses a method in which an asphalt mixture is fed onto a spray emulsion on a lower road surface by a sending device and spread by a screed.
9,578). Also, there is known an asphalt distributor dedicated to spraying an emulsion in which a traveling vehicle is equipped with only an emulsion spraying device and sprays asphalt emulsion on a lower road surface (Japanese Utility Model Publication No. 1-1775). An emulsion spraying apparatus applied to such a machine includes a plurality of spray bars in which a plurality of nozzles for ejecting asphalt emulsion supplied from an emulsion tank are arranged in a state where the spray bars are arranged along the arrangement direction of the nozzles. There is one that adjusts a spray width by being provided so as to be relatively movable along a direction. In the above-mentioned emulsion spraying device, when the spray bars overlap in the arrangement direction of the nozzles, the nozzles of both the spray bars exist in the overlapping portion. Then, the spray density of the asphalt emulsion is increased only in the overlapping portion. Therefore, conventionally, it is necessary to close the nozzle in the overlapping portion of one spray bar with respect to the other.

[0003]

However, in practice, when the nozzles are closed as described above, the amount of asphalt emulsion ejected from other open nozzles varies depending on the number of closed nozzles. Therefore, a problem arises in spraying accuracy. For this reason, there has been a problem that a complicated operation of adjusting the emulsion flow rate to the spray bar having the closed nozzle has to be further performed. Accordingly, an object of the present invention is to provide an asphalt emulsion spraying machine capable of making the spray density uniform without performing complicated adjustment work even if the spray width of the asphalt emulsion is changed.

[0004]

According to a first aspect of the present invention, there is provided an asphalt emulsion spraying machine comprising a plurality of nozzles for spraying asphalt emulsion supplied from an emulsion tank to a traveling vehicle. A plurality of arranged spray bars are provided so as to be relatively movable along the arrangement direction of the nozzles along the arrangement direction of the nozzles, and any one of the spray bars may include another spray bar. It is characterized in that a collecting device is provided for collecting asphalt emulsion ejected from a nozzle at a portion overlapping the spray bar in the arrangement direction.

According to a second aspect of the present invention, the asphalt emulsion spraying machine according to the second aspect of the present invention is configured such that the asphalt emulsion ejected from the nozzle as the recovery device is opposed to a nozzle at a portion overlapping the other spray bar in the arrangement direction. And a pump for returning asphalt emulsion received by the receiving member to the emulsion tank.

According to a third aspect of the present invention, in the asphalt emulsion spraying machine, the receiving member is fixed to the another spray bar.

According to a fourth aspect of the present invention, in the asphalt emulsion spraying machine, the receiving member is provided with heating means for heating the received asphalt emulsion.

According to a fifth aspect of the present invention, there is provided an asphalt emulsion spraying machine, comprising: a delivery device for delivering an asphalt mixture from a delivery portion onto a lower road surface behind the spray bar of the traveling vehicle; and the delivery device. And a screed that spreads the asphalt mixture sent out onto the lower road surface.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described based on embodiments 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 asphalt mixture while spreading asphalt emulsion. A self-propelled traveling vehicle 1 is provided with a hopper 2 for storing asphalt mixture and a delivery of asphalt mixture. And a pair of screeds 5A and 5B, which are provided to extend and contract in left and right and front and back, and a pair of screeds 5A and 5B are provided to extend and contract in left and right and front and back. Spray bar 4A, 4B
While spraying on unpaved subgrade 6 as a lower road surface,
The asphalt mixture is sent from the hopper 2 onto the spray emulsion on the roadbed 6 by the sending device 3 and spread by the screeds 5A and 5B.

[0010] The delivery device 3 includes a bar feeder 3a for carrying out the asphalt mixture from the hopper 2, and a bar feeder 3a.
traveling vehicle 1 with asphalt mixture carried by a
And a spreading screw (bending unit) 3b which is spread in the width direction of the base and sent out onto the roadbed 6. Spray bar 4
A, 4B and the screeds 5A, 5B are supported by the vehicle 1 such that a pair of left and right is shifted in parallel to the front and rear of the traveling direction of the traveling vehicle 1 as described above, and the width direction (left and right) of the vehicle 1 Direction), so that the dispersion width of the emulsion and the spread width of the asphalt mixture A can be arbitrarily adjusted. The traveling vehicle 1 in the figure is a crawler type, but there is also a wheel type.

Each of the spray bars 4A and 4B is provided with a duct structure in front of the spreading screw 3b, and a pair of duct structures provided in front of and in front of the spray bars 4A and 4B in the same manner as the left and right and front and rear. Suction devices 10A and 10B are provided. Each suction device 10
A and 10B are used to remove water from the roadbed 6 by suctioning it from a number of nozzle openings on the lower surface. Although not shown in the drawing, the water is collected after being connected to a cyclone-type water / water separator by a flexible suction hose. Connected to the tank.

Like the spray bars 4A and 4B, the suction devices 10A and 10B are supported by the vehicle 1 such that a pair of right and left is shifted in front and rear in the traveling direction of the traveling vehicle 1, and the width of the vehicle 1 is adjusted. It is provided to be able to expand and contract in the direction. Each of the spray bars 4A, 4B and each of the suction devices 10A, 10B are connected to the side plates 8 of the respective screeds 5A, 5B by their outer ends.
(Omitted in FIG. 1) and supported by the traveling vehicle 1, and has a structure in which the screeds 5A and 5B expand and contract together when the screeds 5A and 5B expand and contract. Spray bar 4
A, 4B, screeds 5A, 5B, suction devices 10A, 1
OB may be individually expanded and contracted.

Next, the spray bars 4A and 4B 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 provided with support plates 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 12A. A plurality of pairs of grooved support rollers 13 are formed on both support plate portions 11 of the support member 12 at inner sides and outer sides at appropriate intervals in the left-right direction. The support shafts 12B, 12B fixed to the support plates 11 in the traveling direction of the traveling vehicle 1 are rotatably supported in the left-right direction. Each of the inner support rollers 13 engages with the upper and lower ridges of a slide member 14 extending in the left-right direction of the traveling vehicle 1 in the groove so that the inner support rollers 13 can be moved substantially horizontally only in the left-right direction. And a spray bar 4A extending in the left-right direction is fixed to a lower portion of the slide member 14 via a connecting piece 14A. Also, the support member 1
The outer supporting roller 13 provided on the rear side of the traveling vehicle 1
And supports the rear slide member 15 extending in the left-right direction so as to be movable only in the left-right direction.
The outer support roller 13 provided on the front side of the support member 12 is
The front slide member 16 extending in the left-right direction is supported so as to be substantially horizontally movable only in the left-right direction.

Below the rear slide member 15, a spray bar 4 B is connected in parallel with the front spray bar 4 A in the length direction, and the connecting member 17 is shifted to the rear side.
Has been fixed through. Spray bar 4B on the rear side
A connecting member 18 is fixed to the connecting member. Between the connecting member 18 and the connecting member 19 fixed to the front slide member 16, a rectangular parallelepiped collection box (receiving member) 20 having an open upper part is fixed. Have been. As a result, the rear slide member 15, the connecting member 17, and the rear spray bar 4 are formed.
B, the connecting member 18, the collection box 20, the connecting member 19, and the front slide member 16 are integrally formed.
Each of the spray bars 4A, 4B is provided with a plurality of nozzles 21 with the ejection ports directed downward, arranged at equal intervals along the length direction of each of the spray bars 4A, 4B.

Each of the spray bars 4A and 4B has a duct structure, and the inside thereof is connected to an emulsion tank 22 through an introduction pipe 23. Then, the asphalt emulsion sucked from the emulsion tank 22 through the filter 23A by the spray pump 24 provided in the introduction pipe 23 is introduced into each of the spray bars 4A and 4B, so that the spray bars 4A and 4B Asphalt emulsion is ejected from each nozzle 21 communicating with the inside. In addition, each nozzle 21 has an opening / closing cylinder 21 which is operated by compressed air and switches between opening and closing of the ejection ports.
a is provided. In addition, the collection box 20
The end wall on the side where the front spray bar 4A exists is provided with a notch 20A to avoid interference with the lower end of the nozzle 21 of the spray bar 4A.

The above-mentioned collection box 20 is provided for the front spray bar 4A, and the front spray bar 4A is located at a portion where the spray bar 4A overlaps the rear spray bar 4B in the longitudinal direction. By being arranged so as to face the nozzle 21, the asphalt emulsion ejected from the nozzle 21 in the overlapping portion is received. Here, this collection box 2
0 is the same length as the rear spray bar 4B, and the rear spray bar 4B is provided with the position in the width direction (left-right direction) of the traveling vehicle 1 coincident with that of the spray bar 4B as described above. Fixed. Thereby, regardless of the relative movement position of each spray bar 4A, 4B,
The asphalt emulsion ejected from the nozzle 21 at the portion where the front spray bar 4A overlaps the rear spray bar 4B is always received.

An excess collection pipe 27 is connected to the bottom of the collection box 20. The surplus recovery pipe 27 communicates with the emulsion tank 22, and the surplus recovery pump (pump) 28 provided on the way sucks the emulsion in the recovery box 20 through the filter 27A and returns the emulsion to the emulsion tank 22. ing. In the collection box 20, a heater (heating means) 29 for heating the received asphalt emulsion is provided.
For example, it is provided on the bottom surface. The heater 29 may be provided on another wall surface of the collection box 20 or on the inside thereof. A collecting device 30 for collecting the asphalt emulsion surplus is constituted by the collecting box 20, the surplus collecting pipe 27, the surplus collecting pump 28 and the like. In FIG. 5, reference numeral 31 denotes a circulation pipe for circulating the asphalt emulsion to maintain the fluidity when the nozzle 21 is closed so as to stop the spraying of the emulsion. An on-off valve 32 is provided which is opened during circulation of the emulsion and closed in other states.

In the asphalt finisher described above, during operation, the delivery device 3, the spray pump 24, and the surplus recovery pump 28 are operated, and the traveling vehicle 1 is operated.
Is moved forward, the asphalt emulsion is sucked from the emulsion tank 22 by the spray pump 24 and
3 to each of the spray bars 4A, 4B. The asphalt emulsion is sprayed on the roadbed 6 from the nozzles 21 of the spray bars 4A and 4B, 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.
The asphalt pavement is spread on the asphalt emulsion spread on the asphalt emulsion, spread by the screeds 5A and 5B, and spread 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 according to the required pavement width, the spray bars 4A and 4B also become screed 5.
A and 5B are expanded and contracted in the same direction together with A and 5B, and the spray width of the asphalt emulsion is changed and adjusted. In the case where the work is temporarily stopped, compressed air is supplied from an air compressor or the like (not shown) to operate the opening / closing cylinder 21a to simultaneously close the nozzles 21a and simultaneously close the opening / closing valve 32 of the circulation pipe 31. Is opened, the asphalt emulsion supplied from the spray pump 24 to the spray bars 4A and 4B is returned to the emulsion tank 22 via the circulation pipe 31 without being sprayed on the roadbed 6, and the emulsion tank 22 And spray bars 4A and 4B. Therefore, when the asphalt emulsion is stopped from being sprayed on the roadbed 6, the inconvenience that the asphalt emulsion stays inside the introduction pipe 23 and the spray bars 4A and 4B and the fluidity is reduced is eliminated. The front spray bar 4A is provided with a collecting device 30 for collecting the asphalt emulsion ejected from the nozzle 21 at a portion overlapping in the longitudinal direction with the rear spray bar 4B, so that the spray width of the asphalt emulsion is reduced. Even if it is changed, since the surplus asphalt emulsion is collected in the emulsion tank 22 by the surplus collection pump 28 of the collection device 30,
The spray density can be made constant without closing the nozzle 21 in the portion of the front spray bar 4A that overlaps with the rear spray bar 4B, so that the spray density can be made uniform without performing a complicated adjustment operation. be able to.
In addition, the spray bar 4A on the front side is used as the collection device 30.
A collection box 20 for receiving the asphalt emulsion ejected from the nozzle 21 facing the nozzle 21 in a portion overlapping the spray bar 4B on the rear side, and an asphalt emulsion received by the collection box 20 in the emulsion tank 2.
Since the pump having the surplus recovery pump 28 for returning to 2 is used, the recovered surplus emulsion can be automatically returned to the emulsion tank 22 and reused for jetting.

Further, the collection box 20 is fixed to the rear spray bar 4B, which moves relatively to the front spray bar 4A where the surplus is collected and adjusts the length of the overlapping portion. Therefore, even if the length of the overlapping portion changes, the collection box 20 is always automatically
Can be opposed to the overlapping portion of the spray bar 4A. In addition, since the recovery box 20 is provided with the heater 29 for heating the received asphalt emulsion, the asphalt emulsion can be maintained in a flow state without lowering the temperature in the recovery box 20, and thus the excess recovery pump 28 Asphalt emulsion in emulsion tank 2
2 can be returned. Further, the suction device 10 is operated when necessary, for example, when the roadbed 6 is wet due to rainfall, and immediately before the spray bars 4A, 4B spray the emulsion on the roadbed 6, the suction device 10 sucks the moisture of the roadbed 6. Therefore, even when it is raining or when the roadbed 6 is wet with moisture, the work of leveling the asphalt mixture can be performed without hindrance by setting the roadbed 6 in a good condition without moisture on the roadbed 6 in advance.

In the above embodiment, the collection box 20 is provided on the rear spray bar 4B so as to collect the surplus of asphalt emulsion from the front spray bar 4A. A collection box 20 may be provided in 4A to collect the surplus of asphalt emulsion from the rear spray bar 4B.
The present invention is not limited to asphalt finishers, as long as it sprays an asphalt emulsion, for example, it can be carried out on a leveling machine such as a repaver or a remixer,
Of course, the present invention can be applied to a machine dedicated to spraying asphalt emulsion. In addition, even when the spray bar is composed of three or more spray bars, the same effect can be obtained by applying the above structure to the spray bars having overlapping portions.

[0021]

As described above, in the asphalt emulsion spraying machine according to the present invention, one of the spray bars collects the asphalt emulsion ejected from the nozzle at the portion overlapping the other spray bar. Even if the spray width of the asphalt emulsion is changed, by collecting the surplus, the spray density can be kept constant without closing the nozzle of the overlapping part of the spray bar even if the spray width of the asphalt emulsion is changed. Therefore, the spraying density can be made uniform without performing complicated adjustment work.

[Brief description of the drawings]

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

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

FIG. 3 is a perspective view showing a spray bar and a collecting device.

FIG. 4 is a sectional view showing a spray bar and a collecting device.

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

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 traveling vehicle 3 delivery device 3b spreading screw (delivery unit) 4A, 4B spray bar 5A, 5B screed 6 roadbed 21 nozzle 22 emulsion tank 20 recovery box 28 surplus recovery pump (pump) 29 heater (heating means) 30 recovery apparatus

Claims (5)

[Claims] 1. A traveling vehicle, comprising: a plurality of spray bars, each having a plurality of nozzles for ejecting asphalt emulsion supplied from an emulsion tank, arranged along a direction in which the nozzles are arranged; In an asphalt emulsion spraying machine movably provided, any one of the spray bars is provided with a collecting device for collecting asphalt emulsion ejected from a nozzle in a portion overlapping with the other spray bar in the arrangement direction. An asphalt emulsion spraying machine characterized by being used. 2. A receiving member for receiving asphalt emulsion ejected from the nozzle opposite to a nozzle in a portion overlapping in the arrangement direction with the another spray bar, and receiving the asphalt emulsion by the receiving member. 2. The asphalt emulsion spraying machine according to claim 1, further comprising a pump for returning the asphalt emulsion to the emulsion tank. 3. The asphalt emulsion spraying machine according to claim 2, wherein said receiving member is fixed to said another spray bar. 4. The asphalt emulsion spraying machine according to claim 2, wherein said receiving member is provided with heating means for heating the received asphalt emulsion. 5. A delivery device for delivering an asphalt mixture from a delivery unit onto a lower road surface behind the spray bar of the traveling vehicle, and an asphalt mixture delivered to the lower road surface by the delivery device. And a screed for laying down the screed is provided.
The asphalt emulsion spraying machine according to any one of the above.