JPH0133604B2 - - Google Patents

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to an apparatus for regenerating waste asphalt by heating and melting it. It relates to an asphalt waste recycling device that heats and melts the asphalt while stirring as it rotates, transfers it to the rear, passes through a rotor provided in a rotating drum, and then discharges it from a discharge port.

``Prior art'' In this type of asphalt waste recycling equipment, especially when the rostol becomes clogged, the amount of recycled material decreases significantly, so cleaning it is one of the essential maintenance tasks after the recycling work is completed. .

However, in the past, as shown in, for example, Japanese Utility Model Application Publication No. 57-187806 and Japanese Patent Application Publication No. 59-404, the rear end of the rotating drum was closed, and recycled asphalt waste material was inserted into the rear end of the rotating drum. A small outlet was provided for the sole purpose of discharging the liquid, and the rostle (screen) was fixed in place within the rotating drum without movement.

``Problem to be Solved by the Invention'' Therefore, in order to clean the inside of the rotating drum and the roost before reuse, it is necessary to clean the asphalt that adheres to the rostol, the inner surface of the rotating drum, the stirring blades, etc., and to prevent it from being discharged. In order to remove impurities such as stones and metals remaining in the drum, a worker had to enter the rotating drum through the raw material input port at the front end. Since this work can only be done after the rotating drum has cooled down, the residual asphalt will completely harden and adhere firmly, and the mesh of the rostol in particular will be completely blocked, so it must be removed. To do this, the solidified asphalt must be manually destroyed by repeatedly hitting the same spot with a chisel and a hammer in a rotating drum, which already has very poor working conditions. Each task had to be done one by one, and although it was not hard labor, it was a difficult task that took a long time.

Therefore, it may be possible to ignite the burner in an empty state without putting asphalt into the rotating drum, and wait for the solidified asphalt adhering to the rotor to melt before starting the regeneration process again. In reality, this method could not be adopted because not only was there a risk that the rotating drum would become abnormally hot and be damaged, but it would also waste fuel.

For this reason, with conventional methods, the above removal work must be performed as if it were a daily routine before starting the regeneration work.
During one use (one day), it sometimes took more effort and time to remove the solidified asphalt than to regenerate it, which shortened the operating time per day and forced a decrease in the amount of regeneration. .
In addition, the damage caused by the solidification of the residual asphalt was extremely large, as destroying and removing the solidified asphalt also destroyed the rostol.

The object of the present invention is to be able to immediately clean the inside of the rostre and the rotating drum to extinguish the burner without the need for an operator to enter the inside of the rotating drum. To provide an apparatus for recycling asphalt waste material which can be easily removed with good workability.

"Means for Solving the Problems" The asphalt waste recycling apparatus of the present invention opens the rear end of the drum main body of the rotating drum over the entire surface to provide a rear end working opening, and in the vicinity of the rear end working opening. A rotor is swingably supported on a shaft protruding inward from the drum body, and a cleaning work door that opens and closes the entire surface of the rear end work opening is screwed to the outside of the drum body so that it can be opened and closed. It is characterized by

``Function'' Therefore, when the cleaning work door is opened, the entire surface of the working opening at the rear end of the drum body is opened, that is, the entire circular surface of the rear end of the drum body is completely opened facing forward. Lostle through the rear end work opening,
The inside of the drum body and the inside of the cleaning work door can be easily cleaned from the outside, that is, residual asphalt and foreign matter can be easily removed. Since the rostol is located near the rear end work opening, the rostol can be cleaned or replaced without the need for an operator to enter the drum body. Moreover, since the rostol can be rotated back and forth, by reversing it back and forth, the front surface can be easily cleaned through the rear end working opening, and by rotating the rostol, there is a space between the outer periphery and the drum body. By forming the gap, residual asphalt in front of the rostol and foreign matter that did not pass through it can be easily removed from the rear end working opening.

"Example" Hereinafter, an example of the present invention will be described in detail 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 by being 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 thereof. The left and right side walls of hopper 3 are input chute 6.
The asphalt waste material introduced into the hopper 3 is smoothly guided to the input chute 6.

As shown in FIGS. 3 and 4, the lower end of the input chute 6 is a cylinder that extends through the fixed disk 7 and projects into the input port 8 of the rotary drum 4, that is, at the center of the lid plate 9 of the rotary drum 4. The asphalt waste material slides on the input chute 6 and enters the input port 8.
It enters into the rotating drum 4. Although the fixed disk 7 and the cylindrical mouth part 10 are fitted, the fixed disk 7 cannot rotate, whereas the cylindrical mouth part 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 has a burner protection cylinder 14 in the center below the input chute 6.
There is a feed cylinder 15 on one side and a thermostat 1 on the other side.
6 and a temperature sensor 17 are penetrated and 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 screw 19 so as to be openable and closable. Burner device 1
When 8 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. Burner device 18 is normally automatically controlled by 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 can be determined by a thermometer 21 (FIG. 2) connected to the temperature sensor 17.

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 rear end of the drum body 23 of the rotating drum 4 is open over its entire surface, and has a vertical circular rear end working opening 2.
It has become 4. A cylindrical cleaning door 25 having a frustoconical shape is screwed to the outer right edge of the rear end work opening 24 by a hinge 26 so as to be able to open and close laterally. Flanges 27 and 28 are provided on the periphery of the rear end work opening 24 and the front end periphery of the cleaning work door 24, respectively.
The cleaning work door 25 is locked by a locking mechanism using these flanges 27 and 28. That is, by passing bolts 29 through holes in both flanges 27 and 28 and tightening them with nuts 30, cleaning work door 25 is firmly held at the rear end of drum body 23 when closed.

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 decelerated and transmitted to the rotating drum 4.

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 with 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, forming a plurality of spiral rows. Each protrusion 41 is the fifth
As shown in the figure, it 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. 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 the nut 46 is attached to the outside of the drum body 23.
It can be removed from the drum body 23 by loosening and removing it, and its 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 installed in the drum body 23 near the rear end working port 24.

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.

The rotor 42 is rotatably supported back and forth by bearing the double shaft protrusions 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 abuts on the rear side. In other words, the rostle 48 can be reversed in its front and rear surfaces. Lostle 48
Normally, the other set of joint plates 51 is connected to the stopper 5.
8, pass bolts through these fixing holes, tighten with nuts, and hold in the front facing state shown in FIGS. 1 and 3.

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 swirled and radiated diagonally forward, swirling around the flames that are injected straight and flowing backwards, merging to form a pulsating flow, and the flames are near the front side of the rostre 48. There is no concentration of heat, and therefore, the range from the front end of the drum body 23 to the rostol 48 can be heated evenly and repeatedly with good heat convection, so the asphalt waste material can be rapidly melted with thermal efficiency.

Therefore, compared to the conventional flame reflecting disk which is simply a vertical disk without flame swirling blades, the reproducing ability is dramatically improved. Since the rostol 48 is curved in a conical shape toward the rear, the molten asphalt is radiated diagonally backward from the periphery of the flame reflecting disk 49 and is pushed out through the grid lines 53.
pass smoothly. 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) swept away in this way, a plurality of screw blades 59 are provided protruding from the inner peripheral surface of the cleaning work door 25. The front end of the screw blade 59 protrudes from the front opening 60 of the cleaning work door 25, and when the cleaning work door 25 is closed, it enters into the drum body 23 and faces a position close 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 cleaning work door 25 rotates together with the drum body 23, it is swept backward by the screw blades 59, and the cleaning work door 25 is swept away by the screw blades 59. The liquid is converged toward the discharge port 61, which is the rear opening of the housing, 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 connected to the machine base 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 pivotably mounted on 1. 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 discharge body 25 with a predetermined interval, and its opening 66 is connected to the lip protrusion 61a of the discharge port 61 of the cleaning work door 35 with a required gap. Form and fit. A latching fitting 78 is fixed to the lower side of this opening 66.
By hooking the hook 80 of the discharge chute 79 to the opening 66, the discharge chute 79 is removably attached to the lower side of the opening 66.

Therefore, the molten asphalt (recycled asphalt) discharged from the discharge port 61 is discharged through the discharge chute 79.
They fall down the river while being guided by the river. 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
It is tightly closed and will not be accidentally opened by the molten asphalt that is washed away.

Therefore, while opening the lid 62 and discharging the molten recycled asphalt from the discharge port 61, the hopper 3
If asphalt waste material is continuously fed into the tank, recycled asphalt can be continuously obtained, which can be used for road paving, etc. immediately.

After extinguishing the burner device 18 and completing the regeneration work, open the discharge section opening/closing door 5 and the cleaning work door 25 before the inside of the rotary drum 4 cools down.
The rear end working port 24 of No. 3 is opened. At this point, the residual asphalt is still soft, so Rostre 4
The residual asphalt adhering to the lattice 53 of No. 8 and the rear surface can be easily scraped off from the outside through the rear end work opening 24, and the cleaning work door 2
Residual asphalt inside 5 can also be easily removed from the outside. Further, by removing the rostol 48 from the stopper 58, rotating it, and reversing its front and rear surfaces, residual asphalt adhering to the front surface can be scraped off. By opening both the left and right sides of the rostol 48, it is possible to scrape off the residual asphalt further in front of the rostre 48 from the outside using a scraping stick, etc., and remove stones that have not passed through the rostol 48.
Contaminants such as metals can also be removed through the rear end working port 24. Further, in this case, the rear end work port 24 faces the front and is completely opened, and since the rostol 48 is located near the rear end work port 24, the operator must clean and replace the rotor 48 inside the drum body 23. This can be easily done without having to enter the burner device 18, and it is also convenient for checking the state of the flame when testing the ignition of the burner device 18. Since the cleaning work door 25 opens horizontally, it does not get in the way of the work. Lid body 62 and discharge port 6
1 and 1, it is easy to remove asphalt adhering to the inside and outside of the lid 62 and the discharge port 61.

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.

"Effects of the Invention" As described above, the present invention has the following effects.

When the cleaning work door is opened sideways, the entire rear end of the drum body is opened, meaning that the entire circular rear end of the drum body is completely opened facing forward. Easily cleans the inside of the rostol, the drum body, and the inside of the cleaning work door from the outside. In other words, the residual asphalt adhering to the rostol and the residual asphalt inside the drum body and cleaning work door can be easily scraped from the outside while it is still soft. You can take it. Therefore, each time the rotary drum is reused, the worker has to wait for it to cool down and then enter the rotary drum to destroy the hardened asphalt, which is a very labor-intensive process. Since time-consuming removal work is no longer necessary, the amount of regeneration per day can be dramatically increased compared to conventional methods.

Since the rostol is located near the rear end work opening, the operator can clean the rostol and replace it without entering the drum body.

Since the rostle can be rotated back and forth, by reversing it back and forth, the front surface can be easily cleaned through the rear end work opening, and by rotating the rostle, a gap is created between its outer periphery and the drum body. By doing so, residual asphalt in front of the rostol and foreign matter that did not pass through it can be easily removed from the rear end working opening.

The work opening at the rear end of the drum body faces the front and is completely open, making it easy to work and convenient for checking the flame condition when testing the ignition of the burner device.

[Brief explanation of drawings]

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. FIG. 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... Support, 3... Hotsupa, 4...
... Rotating drum, 5 ... Discharge part opening/closing door, 6 ... Input chute, 7 ... Fixed disk, 8, 8a ... Input port 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, 1
6...Thermostat, 17...Temperature detector, 1
8... Burner device, 19... Hinge, 20... Flame spout, 21... Temperature type, 22... Air supply fan,
23...Drum body, 24...Rear end work opening, 25
...Cleaning work door, 26...Hinge, 27...Tsuba, 2
8... Tsuba, 29... Boruto, 30... Natsuto, 3
1...Double roller, 32...Single roller,
33... Lateral movement prevention collar, 34... Engine, 3
5...Large sprocket wheel, 36...Reducer, 37...Small sprocket wheel, 38...
Chain, 39... Pulley, 40, 40a... Brake and its lever, 41... Crushing protrusion,
42... Rib, 41a... Anti-rotation protrusion, 41b
... Male thread, 43 ... Stirring feed blade, 44 ...
Hole, 45... Detent frame piece, 46... Nut, 4
7... Bracket, 48... Rostle, 49...
Flame reflecting disk, 50... Lattice plate, 51... Joining plate, 52... Flame swirling blade, 53... Lattice, 5
4...Protrusion, 55...Protrusion, 56...Shaft protrusion, 5
7...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, 67...bracket, 68...upper stile,
69...bracket, 70...shaft, 71...
... Gear block, 72 ... Bearing, 73 ... Arm, 74 ... Bearing, 75 ... Handle, 76 ...
Male thread, 77...Stopper, 78...Latching metal fitting,
79...Ejection chute, 80...Hook, 81...
...Heat shield cover.

Claims (1)

[Claims] 1. Asphalt waste is put into a horizontally long rotating drum from the front end, heated and melted while stirring as the rotating drum rotates, and transferred to the rear. After passing through a rostol installed in the rotating drum, it is passed through a discharge port. In an apparatus for recycling asphalt waste material that is discharged from a drum, the rear end of the drum body of the rotating drum is opened over the entire surface to provide a rear end work opening, and a rear end work opening is provided that protrudes inward from the drum body in the vicinity of the rear end work opening. The asphalt waste material is characterized in that the above-mentioned rostol is swingably supported on the shaft portion of the drum body, and a cleaning work door for opening and closing the entire surface of the rear end work opening is hinged to the outside of the drum body so as to be able to open and close. playback device.