JPS6323325B2 - - Google Patents

Description

Detailed Description of the Invention "Field of Industrial Application" The present invention relates to an apparatus for recycling asphalt waste by heating and melting it. Equipped with a reflective disc, the flame from the burner device is directed toward the flame reflective disc and injected into the rotating drum, while the asphalt waste material is introduced into the rotating drum from one side and agitated as the rotating drum rotates. This relates to an asphalt waste recycling device that melts the asphalt waste and transfers it to the other side, passes through a rostol, and then discharges it from a discharge port.

``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 flame reflector disc was simply a vertical flat plate.

``Problem to be Solved by the Invention'' Therefore, the flame that collides with the flame reflection disk simply diffuses slightly in the circumferential direction along the rostre, and instead of flowing backwards, it concentrates near the front of the rostre. As a result, it is not possible to evenly heat the range from the inlet of the rotating drum to the rostol, which not only makes it impossible to melt the asphalt waste material thermally efficiently, but also makes it impossible to heat the asphalt particularly strongly near the front of the rostol. Therefore, there were problems such as significant deterioration.

The present invention aims to solve these problems.

"Means for Solving the Problems" The present invention is characterized in that the flame reflection disk is provided with flame swirling vanes.

It is preferable that the flame swirling blade is spirally shaped.
Furthermore, it is desirable to provide them radially as a whole. Further, it is preferable that the flame reflecting disk has a conically curved shape.

``Operation'' Therefore, as the flame reflecting disk rotates together with the rotating drum, the flame that collides with the flame reflecting disk is reflected while being rotated by the flame swirling blades, and the flame is reflected inside the rotating drum. It flows backwards while spreading widely.

If the flame swirling blades are made spiral, the swirling reflection of the flame will be even better, if they are arranged radially as a whole, the flame will spread even better, and if the flame reflecting disk is curved into a conical shape, the flame will be centrifugal. Since it flows backward while radiating in the direction, its diffusion and backflow are performed even better.

"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 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 rotary drum 4 through the input port 8. Although the fixed disc 7 is fitted with the cylindrical mouth part 10, the fixed disc 7
is not rotatable, whereas 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 screw 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 discharge body 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 at the front end of the ejector 25, respectively, and by passing bolts 29 through holes in both of the brim 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 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 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.

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 peripheral edge, respectively. The protrusion 55 on the inner periphery protrudes diagonally forward and its tip is located slightly in front of the periphery of the flame reflection disk 49 in order to prevent the pushed asphalt from coming into contact with the flame reflection disk 49. A shaft protrusion 56 is provided protruding from the rear surface of one opposing set of the four joining plates 51, and a stop hole is bored in the other set. The rotor 48 is rotatably supported back and forth by bearing the double shaft projections 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 which is curved into a conical shape. As a result, the flames are rotated and radiated diagonally forward, and the flames flow backwards while circling around the flames that are injected straight, and the flames do not concentrate near the front side of the rostre 48. , therefore the drum body 2
Since the range from the front end of 3 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 rostle 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 molten asphalt is 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 heat shield plate 65 that curves backward 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.
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 tightly closes the discharge port 61 and will not be accidentally opened due to the molten asphalt being washed 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 reversing 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, the asphalt waste recycling device of the present invention has flame swirling vanes on the flame reflection disk of the rostre, so that the flames colliding with the flame reflection disk can be
As the rotating drum rotates, it rotates and reflects the flames, allowing it to swirl around the flames that are being injected straight and cause them to flow backwards. Therefore, since the range from the input port of the rotating drum to the rostol can be heated evenly with good heat convection, the asphalt waste material can be melted quickly and thermally efficiently, and the regeneration ability is dramatically improved compared to the conventional method. Furthermore, since the flames do not concentrate near the front of the rostol unlike in the past, the asphalt does not deteriorate significantly.

[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, 4
8... Lostle, 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 cylinder, 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)

[Scope of Claims] 1. A rostle is disposed within a horizontally long rotating drum, and a flame reflecting disk is provided in the center of the rostle, and the flame from the burner device is directed toward the flame reflecting disk and sprayed into the rotating drum. Asphalt waste material is put into the rotating drum from one side, melted while being stirred as the rotating drum rotates, and transferred to the other side.After passing through the rostle, the asphalt waste material is discharged from the discharge port. In the playback device,
An asphalt waste recycling device characterized in that the flame reflecting disk is provided with flame swirling vanes. 2. The asphalt waste material recycling device according to claim 1, characterized in that the flame swirling blades are spiral-shaped. 3. Claim 1 or 2, characterized in that the flame swirling blades are provided radially as a whole.
The asphalt waste material recycling equipment described in . 4. The asphalt waste recycling device according to any one of claims 1, 2, and 3, characterized in that the flame reflecting disk is curved into a conical shape.