JPS6323324B2 - - Google Patents

Description

Detailed Description of the Invention "Industrial Application Field" The present invention relates to an apparatus for recycling asphalt waste by heating and melting it, in particular, asphalt waste is charged into a horizontally long rotating drum from one side, and the asphalt waste is fed into a horizontally long rotating drum from one side. It relates to an asphalt waste recycling device that heats and melts the asphalt while stirring as it rotates, transfers it to the other side, passes through a rotor provided in a rotating drum, and then discharges it from a discharge port that is opened and closed by a lid.

``Conventional technology'' This type of conventional asphalt waste recycling equipment is
For example, as shown in Japanese Patent Application Laid-Open No. 59-404,
The rotating drum was a single cylindrical body that was continuous from the input port to the discharge port, and a rostle (screen) was fixed halfway inside the drum. In addition, the lid for opening and closing the discharge port is attached to the vertical rear wall of the dome-shaped heat insulating cover that covers the rotating drum so that it can move back and forth.

``Problems to be Solved by the Invention'' However, according to this, it is necessary to clean the inside of the rotating drum after the regeneration work is completed, in other words, it is necessary to remove the residue that adheres to the rotor, the inner surface of the rotating drum, the stirring and feeding blades, etc. In order to remove asphalt and other impurities such as stones and metals that have not been discharged, a worker must enter the rotating drum through the input port and perform the work. Since this work can only be done after the rotating drum has cooled down, the residual asphalt will completely harden and adhere firmly.
In particular, the lattice of rostol is completely blocked, and in order to remove it, it is necessary to use a chisel and a hammer to strike the same spot many times in a rotating drum, which already has very poor working conditions. The hardened asphalt had to be manually destroyed by strong hammering, and this had to be done for each grid, which was a difficult task that required long hours and not hard labor.

If regeneration work is performed with the lattice of the rostol blocked by solidified asphalt, the regeneration ability will be significantly reduced, so this must be avoided as much as possible. Therefore, it is possible to ignite the burner in an empty state without putting any asphalt waste into the rotating drum, wait for the solidified asphalt adhering to the rotor to melt, and then start a new regeneration operation. Not only is there a risk that the rotating drum will become abnormally hot and be damaged, but it will also waste fuel, so it cannot be used in reality.

For this reason, with conventional methods, the above removal work must be performed as if it were a daily routine before starting new regeneration work.
In one use (one day), it may take more effort and time to remove the consolidated asphalt than to regenerate it, and destroying and removing the consolidated asphalt may also damage the rostol. The negative effects caused by the solidification of residual asphalt were extremely large.

In addition, the rear side of the outlet is always covered by the cap-shaped part at the rear end of the heat insulation cover, and the lid is structured so that the outlet opens and closes inside this cap-shaped part, so that residual asphalt can be removed from the outlet. Not only is it naturally impossible to remove the asphalt, but it is also difficult to remove the solidified asphalt that has adhered to the vicinity of the outside and to the lid.

The object of the present invention is to be able to clean the rostol immediately after extinguishing the burner without the need for an operator to enter the rotating drum; in other words, to easily remove residual asphalt adhering to the rostol while it is still soft before hardening; An object of the present invention is to provide an asphalt waste recycling device that can easily remove asphalt adhering to the outside of a lid and a discharge port.

"Means for Solving the Problems" In the present invention, a rotating drum is composed of a discharge body having a discharge port and a drum body, and the discharge body is attached to the drum body so as to be openable and closable. A heat-shielding exhaust opening/closing door that covers the rear side of the exhaust body is pivotally attached to the machine base or the like so as to be freely openable and closable, and a lid body for opening and closing the exhaust port is attached to this exhaust opening/closing door.

``Operation'' Therefore, when the ejector is opened after opening the ejector opening/closing door, the rotary drum is opened so as to be separated into front and rear parts in the middle of the process. The inside of the discharge body can be easily cleaned from the outside, in other words, residual asphalt and foreign matter can be easily removed. Furthermore, by opening the discharge opening/closing door, the lid can be positioned far from the discharge port, and asphalt adhering to the inside and outside of the lid and the discharge port can be easily removed.

"Example" An example of the present invention will be described in detail below based on the drawings.

As shown in FIGS. 1 and 2, the entire asphalt regeneration apparatus is installed on a machine base 1, and is used, for example, at a recycled asphalt construction site, either installed on the ground or mounted on the bed of a truck.

A hopper 3 is installed on the front end of the machine 1 by a support 2, and an oblong rotary drum 4 is supported horizontally on the rear side, and a discharge section opening/closing door 5 is provided at the rear end. It is pivoted so that it can be opened and closed on one side.

The hopper 3 has a charging chute 6 that is inclined downwardly toward the rotating drum 4 side and is integrally connected to the lower center of the hopper 3. The left and right side walls of the hopper 3 are narrowed in two stages while being inclined toward both side edges of the input chute 6, and the asphalt waste materials input into the hopper 3 are smoothly guided to the input chute 6. As shown in FIGS. 3 and 4, the lower end of the input chute 6 passes through the fixed disk 7 and connects to the input port 8 of the rotating drum 4.
The asphalt waste material slides on the input chute 6 and enters the rotary drum 4 through the input port 8. Fixed disk 7 and cylindrical mouth 1
Although the fixed disk 7 is not rotatable, the cylindrical mouth portion 10 rotates together with the rotating drum 4. An annular protrusion 8a is formed on the inner opening edge of the input port 8 for pushing the asphalt waste backward and for reinforcement.

A heat shield plate 11 is attached to the lower side of the input chute 6 for safety because the area below the hopper 3 is a driving machine installation space. Furthermore, a cover plate 12 is provided on one side wall of the input chute 6 so that the inside of the rotating drum 4 can be seen from the outside.
There is a viewing window that can be opened and closed by. Further, the opening frame 13 of the hopper 3 has a groove formed above it so as to be convenient for mounting a larger hopper or for hanging a belt conveyor for carrying in asphalt waste material.

As shown in FIG. 4, the fixed disc 7 is further penetrated with a burner protection cylinder 14 in the center below the input chute 6, a feed cylinder 15 on one side thereof, and a thermostat 16 and a temperature sensor 17 on the other side. It is fixed. As shown in FIGS. 2 and 3, a burner device 18 equipped with a fan is attached to the outer end of the burner protection cylinder 14 by a hinge 19 so as to be openable and closable. When the burner device 18 is closed, the flame spouting part 20 enters into the burner protection cylinder 14, and when it is opened, the flame jetting part 20 is pulled out of the burner protection cylinder 14, making it easy to clean. The burner device 18 is normally automatically controlled by the thermostat 16, but can also be manually controlled. The flame from the burner device 18 is vigorously injected into the rotating drum 4 through the inlet 8. The temperature inside the rotating drum 4 is measured by a thermometer 21 connected to a temperature detector 17.
(Figure 2).

On the other hand, an air intake fan 22 whose air intake amount can be adjusted is attached to the outer end of the air intake cylinder 15.
By introducing air into the rotary drum 4 through the rotary drum 4, the combustibility within the rotary drum 4 can be improved.

The rotating drum 4 is composed of a drum body 23 and a truncated conical cylindrical discharge body 25 that opens and closes a rear end opening 24 .

The ejector 25 has a hinge 2 at the rear end of the drum body 23.
6 so that it can be opened and closed. Flanges 27 and 28 are provided at the rear end of the drum body 23 and the front end of the ejector 25, respectively, and by passing bolts 29 through holes in both of these brims and tightening them with nuts 30, the ejector 25 is closed. is firmly held.

The drum body 23 is rotatably supported by a pair of left and right double rollers 31 on the front side and a pair of left and right single rollers 32 on the rear side, which are pivotally supported on the machine stand 1. The drum main body 23 is firmly prevented from moving back and forth by a lateral movement prevention collar 33 fixed to the front end of its outer circumferential surface and fitted between the front and rear rollers of the double rollers 31.

The rotating drum 4 is rotated in a fixed direction by an engine 34 mounted on the machine base 1.

That is, the chain 3 is connected between the large sprocket wheel 35 fixed to the outer peripheral surface of the cylindrical mouth portion 10 and the small sprocket wheel 37 of the reducer 36.
8 is hung around, and the reducer 36 is connected to the pulley 39.
It is linked to the output shaft of the engine 34 via a belt and a belt, and the rotation of this output shaft is transmitted to the rotating drum 4 after being decelerated.

Rotation of the rotating drum 4 can be restricted by a brake 40 that grips the cylindrical mouth portion 10. The brake 40 can be operated by a lever 40a, and the rotation of the rotary drum 4 is regulated by the brake 40 when the present asphalt waste recycling apparatus is transported.

On the inner circumferential surface of the drum body 23, a large number of crushing protrusions 41, ribs 42, and stirring feed blades 43 are arranged in a predetermined manner as shown below.
It protrudes within a range from the front end to a predetermined midway position.

The protrusions 41 are generally arranged in a spiral shape toward the rear side of the drum body 23 to form a plurality of spiral rows. As shown in FIG. 5, each protrusion 41 is made of heat-treated hard iron and has a conical shape, and has a rectangular anti-rotation protrusion 41a formed on its base end surface, and a male thread 41b integrally protruding from the center thereof. ing. Each protrusion 41 has its male thread 41b penetrated from the inside into a hole 44 formed in the drum body 23, and the rotation stopper protrusion 41a is fixed to the inner peripheral surface of the drum body 23. Fit the frame piece 45, and screw the male screw 4
It is attached to the drum body 23 by screwing a nut 46 onto 1b from the outside of the drum body 23 and tightening it. Therefore, each protrusion 41 is firmly attached to the drum body 23 without rotating, but if the nut 46 is loosened and removed on the outside of the drum body 23, the drum body 2 can be removed.
It can be removed from 3, and replacement is easy.

The ribs 42 are arranged parallel to the axis of the drum body 23 and with a predetermined phase difference from each other in the circumferential direction of the drum body 23. Each rib 42 has a rod shape with a triangular cross section, and is welded to the inner peripheral surface of the drum body 23.

The stirring and feeding blades 43 are arranged in rows between adjacent ribs 42, for example two at a time, separated from each other in the axial direction, and the blades in the adjacent rows are arranged in a different manner in the axial direction. Each stirring feed blade 43 is fixed to a pair of brackets 47 welded to the inner circumferential surface of the drum body 23 using bolts and nuts so that it can be removed, and is fixed with respect to the axis of the drum body 23. is inclined in the direction of

Therefore, the asphalt waste material charged into the drum body 23 is crushed by the protrusions 41 as the drum body 23 rotates, and at the same time is stirred by the stirring feed blades 43 and the ribs 42 and sent to the burner device 18. While being melted by the heat of the flame, it is pushed backward mainly by the stirring and feeding blades 43, and since the protrusions 41 are arranged in a spiral, it is also pushed backward by this, and furthermore, new It is also pushed backward by asphalt waste material thrown into the area.

In order to allow only the molten asphalt waste material pushed forward to pass through, a rostol 48 is attached to the rear side of the drum body 23.

As shown in FIGS. 1, 3, and 6, the rostre 48 is constructed by firmly connecting a flame reflecting disk 49 in the center and four fan-shaped lattice plates 50 around it by connecting plates 51. The overall shape is an umbrella shape that curves backwards. The flame reflecting disk 49 is curved into a conical shape, and has a plurality of spiral flame swirling blades 52 projecting radially from the front surface thereof. The lattice plate 50 has a large number of lattice holes 53, and a large number of protrusions 54 and 55 integrally formed on the outer peripheral edge and the inner periphery, respectively. The protrusion 55 on the inner peripheral edge protrudes diagonally forward and its tip is located slightly in front of the peripheral edge of the flame reflective disc 49 in order to prevent the pushed asphalt from coming into contact with the flame reflective disc 49. A shaft protrusion 56 is provided protruding from the rear surface of one set of the four joining plates 51 facing each other, and a stop hole is bored in the other set. And Lostle 4
8 is supported so as to be rotatable back and forth by bearing the double shaft protrusion 56 on a pair of bearing tubes 57 fixed to the inner circumferential surface of the drum body 23. A pair of stoppers 58 are protruded from the inner circumferential surface of the drum body 23 with a phase difference of 90 degrees from the bearing tube 57. It can be rotated approximately 180 degrees until it comes into contact with the rear side.
In other words, the rostle 48 can be reversed in its front and rear surfaces. Normally, the rotor 48 is held in the front-facing state shown in FIGS. 1 and 3 by bringing the other set of joint plates 51 into contact with the stopper 58, passing bolts through these retaining holes, and tightening them with nuts. I'll keep it.

Therefore, the flame injected straight from the burner device 18 collides with the flame reflection disk 49 and is reflected. This reflected flame is absorbed by a spiral flame swirling blade 52 protruding from the front surface of the flame reflecting disk 49, which rotates together with the rotating drum 4, and the flame reflecting disk 49 is curved into a conical shape. As a result, the flames are rotated and radiated diagonally forward, swirling around the flames that are injected straight and flowing backwards, and the flames do not concentrate near the front side of the rostre 48. Therefore, the drum body 23
Since the range from the front end to the rostol 48 can be heated evenly with good heat convection, the asphalt waste material can be melted quickly and thermally efficiently. Therefore, compared to the conventional flame reflecting disk, which is simply a vertical disk without flame swirling blades,
Regeneration ability improves dramatically. Since the rostol 48 is conically curved to the rear, the molten asphalt smoothly passes through the lattice 53 so as to be radiated obliquely backward from the periphery of the flame reflecting disk 49 and pushed out. In other words, the molten asphalt is radiated from the periphery of the flame reflecting disk 49 in a centrifugal direction and is pushed toward the rear.

In order to actively discharge the molten asphalt (recycled asphalt) that is swept away in this way,
A plurality of screw blades 59 are provided protruding from the inner peripheral surface of the discharge body 25. The front end of the screw blade 59 protrudes from the front opening 60 of the ejector 25, and when the ejector 25 is closed, it enters the drum body 23 and comes into close proximity to the roistle 48.

Therefore, the molten asphalt that has passed through the roaster 48 is immediately captured by the screw blades 59, and as the discharge body 25 rotates together with the drum body 23, it is pushed backward by the screw blades 59, and the It is collected toward the discharge port 61, which is the rear opening, and is discharged from there.

In order to open and close the discharge port 61, a disc-shaped lid 62 is attached to the discharge section opening/closing door 5 described above as follows.

That is, the discharge section opening/closing door 5 is connected to the left and right vertical frames 6.
A rearwardly curved heat shield plate 65 is stretched between 3 and 64, and a circular opening 66 is formed in the center of the heat shield plate 65. A shaft 70 is horizontally supported between a bracket 69 projecting from the center of the stile 68 by a gear block 71 and a bearing 72.
The base end (upper end) of a J-shaped arm 73 is fixed to this shaft 70. The lid body 62 is rotatably supported by a bearing 74 at the tip (lower end) of the arm 73, and when the handle 75 of the gear block 71 is turned in the forward direction to rotate the shaft 70 in the forward direction, the arm 73 is rotated in the forward direction. is rotated downward so that the lid body 62 faces into the opening 66 in an almost vertical state, and the handle 7
5 in the opposite direction, the arm 73 is rotated upward and the lid 62 is moved away from the opening 66.

The discharge section opening/closing door 5 is opened by fitting a bearing cylinder built into the vertical stile 63 to a vertical shaft (not shown) installed upright at the corner of the rear end of the machine base 1. It is pivotally mounted on the table 1 so as to be freely rotatable. This door 5 is secured by passing a male screw 76 protruding from the lower end of the vertical stile 64 through a hole in a stopper 77 fixed to the rear end of the machine base 1, as shown in FIG. 2, and tightening it with a nut. This will keep it closed. In this state, the heat shield plate 65 covers most of the outer surface of the exhaust body 25 with a predetermined interval, and the opening 66 forms a required gap between the lip protrusion 61a of the discharge port 61 of the exhaust body 25. and then mate. A hook 78 is fixed to the lower side of the opening 66, and by hooking a hook 80 of the discharge chute 79 to the hook 78, the discharge chute 79 is removably attached to the lower side of the opening 66. There is.

Therefore, the molten asphalt (recycled asphalt) discharged from the discharge port 61 is discharged through the discharge chute 79.
It falls down the river while being guided by. Discharge port 61
is closed with a lid 62 when the recycled asphalt is not yet to be discharged. The lid body 62 tightly fits into the lip protrusion 61a of the discharge port 61 and rotates together with the rotating drum 4. This lid body 62 is J
Since it is attached to the tip of the arm 73 which is bent into a letter shape, the moment at the tip of the arm 73 in the vertical state with the outlet 61 closed is straight in the axial direction of the outlet 61 with respect to the lid body 62, and with maximum force. act. Therefore, the lid body 62 tightly closes the discharge port 61 and will not be accidentally opened due to the molten asphalt being swept away.

Thus, by opening the lid 62 and discharging the molten recycled asphalt from the discharge port 61, if asphalt waste material is continuously introduced into the hopper 3 one after another, recycled asphalt can be obtained continuously. As a result, road paving, etc. can be carried out immediately.

When the burner device 18 is extinguished and the regeneration work is completed, the discharge section opening/closing door 5 and the discharge body 25 are opened to open the rear opening 24 of the drum body 23 before the inside of the rotary drum 4 is cooled down. At this point, the residual asphalt is still soft, so the residual asphalt adhering to the lattice 53 and rear surface of the rostol 48 can be easily scraped off from the outside through the rear opening 24, and the residual asphalt in the discharge body 25 can also be removed from the outside. can be easily removed from Also,
By removing the rostol 48 from the stopper 58, rotating it, and inverting its front and rear surfaces, the residual asphalt adhering to the front surface can be scraped off. Furthermore, by rotating the rostol 48 by an appropriate angle, By opening both the left and right sides, you can scrape off the residual asphalt further in front of the rostre 48 from the outside using a scraping rod, etc., and also remove foreign matter such as stones and metals that did not pass through the rostol 48 from the rear. It can be removed through opening 24. Furthermore, since the lid 62 and the discharge port 61 are far apart from each other, asphalt adhering to the inside and outside of the lid 62 and the discharge port 61 can be easily removed.

Note that during the regeneration work, the drum body 23 is covered with a dome-shaped heat shielding cover 81. Heat shield cover 81
is removably mounted on the machine base 1 and can be separated from this asphalt waste recycling apparatus.

In the above embodiment, the rostle 48 is connected to the drum body 23.
Although it is installed inside the exhaust body 25, it may be installed inside the ejector 25. In this case, the drum body 2 is placed on the front side of the ejector 25.
It is preferable to extend a cylindrical portion having the same diameter as 3 and attach the rostrtle 48 to the front opening of this cylindrical portion.

Moreover, as a drive source for rotating the rotating drum 4, a motor operated by a generator may be used.

"Effects of the Invention" As described above, in the asphalt waste recycling apparatus of the present invention, the rotating drum is separated into the drum body and the discharge body, and the discharge body is attached to the drum body so that it can be opened and closed, so that the discharge body cannot be opened. The rotating drum can be opened midway through the opening, and the inside of the rostol, drum body, and ejector can be cleaned from the outside through the opening. In other words, the residual asphalt adhering to the rostol and the residual asphalt inside the drum body and ejector can be cleaned from the outside. It can be easily scraped off from the outside when it is still soft. Therefore, there is no longer any need for a worker to enter the rotating drum and smash and destroy the solidified asphalt each time it is reused, which is a very laborious and time-consuming removal process, as in the past. The amount of regeneration per day will increase dramatically compared to before.

In addition, by opening the discharge opening/closing door, the lid can be positioned far from the discharge port.
It is also easy to remove asphalt adhering to the lid and the inside and outside of the outlet.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, in which Fig. 1 is a partially cutaway perspective view of the whole, Fig. 2 is a side view, Fig. 3 is a sectional view of the hopper and rotating drum, and Fig. 4 is the rotating drum. 5 is an exploded perspective view showing the attachment structure of the crushing protrusion, and FIG. 6 is a rear view of the rear opening of the drum body as seen from the rear with the roaster reversed. . 1...Machine base, 2...Strut, 3...Hopper, 4...Rotating drum, 5...Discharge section opening/closing door, 6...Insertion chute, 7
...Fixed disc, 8, 8a...Inlet and its protrusion, 9
... Lid plate, 10... Cylindrical mouth part, 11... Heat shield plate, 12...
Lid plate, 13... Opening frame, 14... Burner protection tube, 15
... Supply cylinder, 16 ... Thermostat, 17 ... Temperature detector, 18 ... Burner device, 19 ... Hinge, 20 ... Flame spout, 21 ... Thermometer, 22 ... Air supply fan, 2
3... Drum body, 24... Rear end opening, 25... Discharge body, 26... Hinge, 27... Flange, 28... Flange, 29... Bolt, 30... Nut, 31... Double roller, 32
... Single roller, 33 ... Lateral movement prevention collar, 34
...Engine, 35...Large sprocket wheel, 3
6...Reducer, 37...Small sprocket wheel, 3
8... Chain, 39... Pulley, 40, 40a... Brake and its lever, 41... Crushing protrusion, 4
2... Rib, 41a... Anti-rotation protrusion, 41b... Male thread, 43... Stirring feed blade, 44... Hole, 45... Anti-rotation frame piece, 46... Nut, 47... Bracket, 48
...Rostle, 49...Flame reflecting disk, 50...Grid plate, 51...Joint plate, 52...Flame swirling blade, 53...
Lattice, 54...Protrusion, 55...Protrusion, 56...Shaft protrusion, 57...Bearing tube, 58...Stopper, 59...Screw blade, 60...Front opening, 61, 61a...Discharge port and its mouth edge protrusion, 62 ...Lid body, 63... Vertical stile, 64... Vertical stile, 65... Heat shield plate, 66... Opening, 6
7...Bracket, 68...Upper stile, 69...Bracket, 70...Shaft, 71...Gear block, 7
2...Bearing, 73...Arm, 74...Bearing, 75...Handle, 76...Male thread, 77...Stopper, 78...
Latch fitting, 79...Discharge chute, 80...Hook,
81...Heat shield cover.

Claims (1)

[Claims] 1. Asphalt waste is put into a horizontally long rotating drum from one side, heated and melted while stirring as the rotating drum rotates, and transferred to the other side. After passing through the rostle provided in the rotating drum, In an asphalt waste recycling device that discharges from a discharge port that is opened and closed by a lid, the rotary drum is composed of a discharge body in which the discharge port is formed and a drum body, and the discharge body can be opened and closed on the drum body. In addition, a discharge opening/closing door capable of covering the outer surface of the discharge body around the discharge port is pivotally attached to the machine base, etc., and the lid body is attached to the discharge opening/closing door so as to be openable/closable. Asphalt waste recycling equipment featuring: