JP5787401B2 - Asphalt pavement waste recycling dryer - Google Patents

Description

  The present invention relates to an asphalt pavement waste recycling dryer that heats and regenerates asphalt pavement waste generated by road construction and the like.

  A dryer that heats and recycles asphalt pavement waste (hereinafter referred to as “waste material”) has a drum that is rotatably supported in an inclined manner, and repeatedly scrapes and drops the waste with a large number of scraping blades that are provided around the inner surface of the drum. However, while rolling down the inside of the drum, the waste material is heated to a predetermined temperature by contacting with hot air fed from the burner. When waste material is heated in the drum, the stickiness of the asphalt that adheres to the waste material increases, so the waste material gradually adheres and grows on the scraping blades in the drum, and finally the function of the scraping blades It can be detrimental. For this reason, in order to restore the function of the scraping blade, it is troublesome in terms of maintenance and management, for example, an operator needs to periodically remove and remove the waste material adhering to the scraping blade after entering the drum. Had a problem.

  In order to solve the above problem, for example, Patent Document 1 (Japanese Patent Laid-Open No. 2005-16139) discloses a configuration in which a scraping blade is formed of a cylindrical body. According to Patent Document 1, the scraping blade made of a cylindrical body has a curved surface on the blade surface, so that the adhesion area of the waste material is small because the surface area with the waste material is small, and the conventional scraping blade with a plate shape. It is harder to adhere compared to, and is easy to peel off even if waste material adheres.

JP 2005-16139 A

  As described above, the scraping blade configured of the cylindrical body as described above can suppress the adhesion of the waste material as much as possible, but cannot completely eliminate the adhesion to the scraping blade. Therefore, it is always desired to improve the scraping blade so that it has an excellent effect of preventing the adhesion of the waste material to the scraping blade and can easily remove the deposit.

  In view of the above points, the present invention has an object to provide a dryer for asphalt pavement waste material recycling that makes it difficult for waste material to adhere to the scraping blades, and even if it adheres, the removal work can be performed efficiently, and has excellent maintainability. To do.

In order to solve the above-mentioned problems, in the asphalt pavement waste material recycling dryer according to claim 1 according to the present invention, asphalt pavement waste material regeneration in which a number of scraping blades are provided around the inner peripheral wall of a drum that is rotatably supported in an inclined manner. In the dryer, the scraper blade is formed of a cylindrical body whose surface is slippery and hardly causes waste materials to adhere, and the longitudinal direction of the cylindrical body is substantially parallel to the longitudinal direction of the drum and between the inner peripheral wall of the drum. The cylindrical body is supported on a support piece standing on the inner peripheral wall of the drum so that the cylindrical body can be rotated manually, and the cylindrical body is rotated little by little over the entire circumferential surface of the cylindrical body. It is characterized in that the waste material adhering to the surface can be peeled and removed .

  In the dryer for recycling asphalt pavement waste according to claim 2, a short pipe having a diameter smaller than the inner diameter of the cylindrical body is fixed to the support piece substantially parallel to the longitudinal direction of the drum, and the end of the cylindrical body is fixed to the short pipe. It is characterized in that the cylindrical body is rotatably supported by loosely fitting the part opening.

  In the dryer for recycling asphalt pavement waste according to claim 3, a through hole having a diameter larger than the outer diameter of the cylindrical body is formed in the support piece, and an end of the cylindrical body is inserted into the through hole. The cylindrical body is rotatably supported.

According to the asphalt pavement waste material regeneration dryer according to claim 1 of the present invention, in the asphalt pavement waste material regeneration dryer in which a number of scraping blades are provided around an inner peripheral wall of a drum that is rotatably supported in an inclined manner. The blades are made of a cylindrical body whose surface is slippery and is less likely to adhere to waste, and the longitudinal direction of the cylindrical body is substantially parallel to the longitudinal direction of the drum and a predetermined gap is provided between the inner circumferential wall of the drum and the blade. The cylindrical body is supported on a support piece standing on the inner peripheral wall of the drum so that it can be rotated manually, and the waste material adhering to the entire circumferential surface of the cylindrical body is peeled and removed while rotating the cylindrical body little by little. Since it is configured so that the worker can remove the waste material adhering to the cylindrical body that is a scraping blade after entering the drum, the entire circumferential surface of the cylindrical body is rotated little by little by hand. In The waste to be deposited hammer to strike be peeled removed, reasonably without changing the working posture even in a small drum, and can be performed efficiently removing operation. In addition, by supporting the cylindrical body as a scraping blade in a freely rotatable manner, when scraping the waste material staying at the bottom of the drum by the cylindrical body, and further, when the waste material lifted upward by the cylindrical body spills down, The cylinder is rotated little by little while scraping off a part of the waste that has adhered by rubbing the surface of the cylinder, so that the deposit is scraped over the entire circumference of the cylinder. . As a result, it is expected that the growth of the waste material adhering to the scraping blade can be prevented as much as possible, and the maintenance workability is excellent, for example, the frequency of the removal work can be reduced.

  Further, according to the asphalt pavement waste material recycling dryer according to claim 2, a short pipe having a diameter smaller than the inner diameter of the cylindrical body is fixed to the support piece substantially parallel to the longitudinal direction of the drum, and the cylindrical body is fixed to the short pipe. Since the cylindrical body is rotatably supported by loosely fitting the end opening of the cylindrical body, the cylindrical body can be rotatably supported with a simple configuration, and the manufacturing cost is low.

  According to the asphalt pavement waste material recycling dryer according to claim 3, the support piece is formed with a through hole having a diameter larger than the outer diameter of the cylindrical body, and the end of the cylindrical body is formed with respect to the through hole. Since the cylindrical body is rotatably supported by being inserted, the contact area between the cylindrical body and the support piece is small and the cylindrical body rotates more smoothly. It can be expected that the adhering waste material will be scraped off more effectively.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a partially cutaway explanatory view showing an embodiment of an asphalt pavement waste recycling dryer according to the present invention. It is AA sectional drawing of FIG. It is explanatory drawing of a raking blade | wing, Comprising: (a) A partially cutaway front view, (b) It is sectional drawing. It is a figure equivalent to FIG. 3 of another Example.

In the asphalt pavement waste material recycling dryer according to the present invention, the scraper blade provided around the inner peripheral wall of the drum is formed of a cylindrical body that has a slippery surface and is less likely to cause waste material adhesion. The cylindrical body is erected on the inner peripheral wall of the drum with a predetermined gap so that the longitudinal direction of the cylindrical body is substantially parallel to the longitudinal direction of the drum and it is difficult to adhere and hold the waste material between the cylindrical body and the inner peripheral wall of the drum. The support piece is supported so that it can be rotated manually, and the waste material adhering over the entire circumferential surface of the cylindrical body can be peeled and removed while rotating the cylindrical body little by little .

  In addition, as a support structure of the cylindrical body by the support piece, for example, a short pipe having a slightly smaller diameter than the inner diameter of the cylindrical body is fixed to the support piece, and the end opening of the cylindrical body is loosely fitted to the short pipe. Thus, the cylindrical body is rotatably supported. Alternatively, an appropriate support is provided such that a hole having a diameter slightly larger than the outer diameter of the cylindrical body is formed in the support piece, and the end of the cylindrical body is inserted into the through hole so as to be rotatable. The cylindrical body is made rotatable by the structure.

  When the waste material is supplied and heated in the drum having the above-described configuration, the asphalt contained in the waste material is softened and gradually becomes adherent, and easily adheres to the cylindrical body that is the scraping blade. On the other hand, when scraping the waste material staying at the bottom of the drum by the cylinder, and when the waste material lifted upward by the cylinder spills down, the scrap will rub against the surface of the cylinder and adhere to the cylinder. Scrub off some of the waste. At this time, the cylindrical body is rotated little by little by the movement of the waste material, and the rubbing position of the cylindrical surface by the waste material gradually changes, and the waste material that adheres to the entire circumferential surface of the cylindrical body by this repetition. Can be scraped off.

In addition, if the dryer is operated for a long period of time, the waste material inevitably grows on the scraping blade, so it is necessary for the worker to enter the drum and remove the waste material adhering to the scraping blade. Come. At this time, the worker turns the cylindrical body of the scraping blade little by little by hand, and strikes the part where the waste material is attached toward the front side where it is easy to work with a hammer etc. The attached waste material is peeled and removed. In this way, the cylindrical body of the lifting blade can be manually rotated, so that even in a narrow drum, the removal operation can be performed efficiently and without changing the working posture.

As described above, according to the asphalt pavement waste material recycling dryer according to the present invention, when the scrap material adhered and grown on the scraping blade is removed by configuring the scraper blade with the cylindrical body rotatably supported, By rotating the cylinder little by little by hand, the waste material adhering to the entire peripheral surface of the cylinder can be easily peeled and removed with a hammer or the like without changing the working posture in the narrow drum. Further, when scraping or dropping the waste material in the drum by the cylindrical body, it can be expected that the waste material adhering over the entire circumferential surface of the cylindrical body is scraped off by rotating the cylindrical body little by little.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

  In the figure, reference numeral 1 denotes a dryer for reclaiming asphalt pavement waste, and a cylindrical drum 3 around which a number of scraping blades 2 are provided is rotatably supported on a machine base 4 so that a drive motor ( (Not shown) and rotated at a predetermined speed.

  The drum 3 includes a burner 5, and burns the burner 5 to supply hot air while forming a flame in the drum 3, while supplying waste material from the belt conveyor 6 into the drum 3, The waste material is heated to a predetermined temperature while rolling down the drum 3 while scraping the waste material.

  The front half of the drum 3 on the burner 5 side is lined with a heat-resistant steel material 7 without the scraping blades 2, and forms a stable burner flame in the drum 3. The inner wall surface of the drum 3 is protected.

  FIG. 2 is a cross-sectional view taken along the line AA of FIG. 1. As shown in the drawing, a large number of scraping blades 2 are provided around the rear half of the drum 3. For example, the scraper blade 2 is made of a steel cylindrical body 8 having an outer diameter of about 90 mm and a length of about 1700 to 1800 mm so that the surface is slippery and the waste material is difficult to adhere. The cylindrical body 8 is disposed substantially parallel to the longitudinal direction of the drum 3 and both ends thereof are rotatably supported with respect to support pieces 9 erected on the inner peripheral wall of the drum 3 at a predetermined interval. In addition, it is appropriate to consider the size and properties of the waste material so that the waste material is difficult to adhere and hold between the cylindrical body 8 and the inner peripheral wall of the drum 3 and has a predetermined scraping function by the cylindrical body 8. A width, for example, a gap of about 60 mm is provided.

  As a support structure of the cylindrical body 8 and the support piece 9, for example, as shown in FIGS. 3A and 3B, a pair of support pieces 9 erected on the inner peripheral wall of the drum 3 is attached to the cylindrical body 8. A short tube 10 having a diameter slightly smaller than the inner diameter, for example, an outer diameter of about 80 mm is fixed substantially parallel to the longitudinal direction of the drum 3, and both ends of the cylindrical body 8 are loosely fitted to the pair of short tubes 10. By doing so, the cylindrical body 8 is rotatably supported. At this time, as shown in FIG. 3, the entire outer peripheral surface of the short tube 10 is covered with the cylindrical body 8 so that the waste material does not adhere to the outer peripheral surface of the short tube 10. In addition, by preventing the gap between the outer peripheral surface of the short tube 10 and the inner peripheral surface of the cylindrical body 8 from having a very large gap, fine waste material is caught in the gap, and the rotational performance of the cylindrical body 8 is improved. It is preferable not to damage.

  Further, the scraping blade 2 preferably has a cylindrical body 8 having an appropriate width, for example, a gap of about 60 mm and arranged in parallel so as to lift more waste material up to the upper part of the drum 3 and generate hot air. This improves the heating efficiency of the dryer 1.

  When the waste material is supplied into the drum 3 of the dryer 1, the scrap material is scraped up by the scraping blades 2, and while it rolls down and rolls down inside the drum 3, it comes into contact with the hot air from the burner 5 and reaches a predetermined temperature. It will be heated. When the waste material is heated, the asphalt contained in the waste material is softened and gradually becomes sticky, and gradually adheres to the cylindrical body 8 of the scraping blade 2 and the like.

At this time, when the waste material staying at the bottom of the drum 3 is scraped up by the cylindrical body 8 and further when the waste material lifted upward by the cylindrical body 8 spills down, the waste material adheres by rubbing the surface of the cylindrical body 8. A part of the waste material is scraped off. In addition, since the cylindrical body 8 is rotatable, it is rotated little by little by the movement of the waste material. When the cylindrical body 8 is rotated, the position of rubbing the surface of the cylindrical body 8 by the waste material is gradually changed, and the waste material adhering over the entire circumferential surface of the cylindrical body 8 is scraped off by this repetition.

In addition, when the waste material has to adhere to and grow on the cylindrical body 8 and is removed, the worker performs the removal work by striking the waste material that has entered the drum 3 and attached to the cylindrical body 8 with a hammer or the like. At this time, the worker peels and removes the adhering matter by striking the entire circumference of the cylindrical body 8 while rotating the cylindrical body 8 little by little by hand. As described above, the removal work is performed by rotating the cylindrical body 8 little by little by hand, so that the waste material adhering to the entire circumferential surface of the cylindrical body 8 without changing the working posture in the narrow drum 3 can be easily pushed with a hammer or the like. It can be struck and can be removed efficiently.

  4A and 4B show another embodiment of the support structure of the cylindrical body 8, and the support piece 9 that supports the cylindrical body 8 has an outer diameter of the cylindrical body 8. Is formed with a circular through hole 11 having a diameter of about 100 mm, for example, and a cylindrical body 8 having a diameter of about 90 mm is inserted into the through hole 11, and a plate body 12 at the end of the cylindrical body 8 is inserted. The cylindrical body 8 is prevented from coming off. At this time, as shown in FIG. 4, if the cylindrical body 8 is supported by a plate-like support piece 9, the contact area with the cylindrical body 8 can be reduced and the cylindrical body 8 can be easily rotated. It can be expected that the waste material adhering to the entire peripheral surface of the steel can be scraped off more efficiently.

  In the above-described embodiment, the two cylindrical bodies 8 of the scraping blade 2 are arranged in parallel. However, although the scraping ability is lowered, the cylindrical body 8 is made one or the scraping ability is reduced. In order to further improve, three or more cylindrical bodies 8 may be arranged in parallel.

DESCRIPTION OF SYMBOLS 1 ... Heating dryer for asphalt pavement waste material reproduction 2 ... Scooping blade 3 ... Drum 5 ... Burner 8 ... Cylindrical body 9 ... Supporting piece 10 ... Short pipe

Claims (3)

In the asphalt pavement waste material recycling dryer with a large number of scraping blades on the inner wall of the drum that is supported in a freely tilting manner, the scraping blades are made of a cylindrical body that is easy to slip on the surface and hardly adheres to the scrap material. The cylindrical body can be rotated manually by a support piece standing on the inner peripheral wall of the drum, with the longitudinal direction of the cylindrical body approximately parallel to the longitudinal direction of the drum and a predetermined gap between the cylindrical inner peripheral wall and the drum. supported so that, asphalt pavement waste regeneration dryer, characterized in that the waste material that is deposited over the entire circumferential surface of the cylindrical body while rotating slightly to the cylindrical body and configured to be separated and removed.   2. The asphalt pavement waste recycling dryer according to claim 1, wherein a short pipe having a diameter smaller than the inner diameter of the cylindrical body is fixed to the support piece substantially parallel to the longitudinal direction of the drum, and an end opening of the cylindrical body is opened to the short pipe. An asphalt pavement waste material reclaimer characterized in that the cylindrical body is rotatably supported by loosely fitting the part.   The asphalt pavement waste material recycling dryer according to claim 1, wherein a through hole having a diameter larger than the outer diameter of the cylindrical body is formed in the support piece, and an end of the cylindrical body is inserted into the through hole to form a cylinder. An asphalt pavement recycling material dryer characterized by supporting the body in a freely rotatable manner.

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