JPH0624007U - Recycle drier Recycled pavement material adhesion prevention device - Google Patents

Abstract

(57) [Summary] (Modified) [Purpose] The present invention forcibly removes the regenerated pavement-generating material adhering to flights, etc. to prevent the regenerated pavement-generating material from adhering and accumulating, and to provide a rotary drum dryer The purpose is to suppress the decrease in heating efficiency of. A flight 10 having a rotation moment on one end side larger than that on the other end side is rotatably attached to a support member provided on the inner wall surface of the rotating drum 3 so that one end side of the flight comes into contact with the rotating drum. A stopper 11 for preventing a certain amount of rotation in the direction opposite to the rotation direction of the flight is provided on the inner wall surface of the support member or the rotating drum, and
The rotation preventing member 12 for preventing the rotation of the same direction or more in the same direction as the rotating drum through the one end side thereof is provided between the support member, the inner wall surface of the rotating drum or the inner wall surface of the rotating drum and the flight. I set it in the crab.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is, for example, a recycle drier used for reclaiming regenerated pavement materials such as asphalt pavement generated from excavation of paved roads, etc. The present invention relates to a pavement generation material adhesion prevention device.

[0002]

[Prior art]

 Generally, a rotary drum type dryer device is used to recycle the waste material generated when the asphalt paved road is replaced.

In this dryer device, the burner combustion gas is fed into the rotary drum while the rotary drum having the inclined axis (drum shaft) is rotated by the drive device, and the waste material is introduced into the rotary drum from the inlet through the conveyor. However, while repeatedly scraping up and dropping by the flight provided in the rotary drum, the fluid flows with stirring toward the discharge port. During this period, the waste material is dried and heated by the hot air of the burner combustion to be regenerated and discharged from the discharge port.

However, in the dryer, the waste material adheres to the surface of the flight or the like and is secondarily deposited, and the heating efficiency of the rotating drum is reduced. Further, the work of peeling off the adhered / accumulated matter inside the rotary drum requires a great deal of labor and time.

Therefore, for example, a device for preventing attachment of recycled pavement generation material of a recycle drier, which is disclosed in Japanese Utility Model Publication No. 51-105058, has been devised. As shown in Fig. 4, the recycle drier adhesion prevention device for regenerated pavement material heats and regenerates the regenerated pavement generation material including asphalt, aggregates, etc. The body 22 is suspended so as to bridge it, and the cords 22 are used to remove the deposits such as asphalt and aggregates deposited and deposited in the flight 21.

[0006]

[Problems to be solved by the device]

 However, in the conventional recycle drier pavement generation material adhesion prevention device, asphalt mortar and other deposits adhere and grow starting from the base of the flight 21, and if left unattended, the flight 21 will be filled up. Sometimes. Although the shape and position of the fly 21 have been variously devised, the results have not necessarily been satisfactory.

As a result, the attached matter such as asphalt mortar attached to the cord 22 cannot be peeled off from the inside of the fried food 21, and the accumulated and gradually spread to the central portion as well. Therefore, although there was an effect of removing deposits at the beginning of operation, the effect of removing deposits declined over time, and there was a problem that the heating efficiency of the rotary drum dryer was reduced. The work of peeling off the deposits once deposited / accumulated on the rotary drum requires a manual chipping work, which requires a lot of time and labor.

The present invention has been made in order to solve the above-mentioned problems, and an object thereof is to forcibly remove the regenerated pavement generating material adhering to the frit or the like and to attach the regenerated pavement generating material. -It is an object of the present invention to provide a device for preventing the adherence of recycled pavement generation material in a recycle dryer that can prevent accumulation and prevent a decrease in heating efficiency of a rotary drum dryer.

[0009]

[Means for Solving the Problems]

 The present invention arranges a plurality of lights inward on the inner wall surface of a rotating drum that heats and regenerates the regenerated pavement generating material, and reproduces the regenerated pavement generating material that adheres to and accumulates on this flight, etc. In the device for preventing the adherence of recycled pavement material from the recycle drier to be removed from the recycle drier, the flutter whose rotation moment on one end side is greater than that on the other end side is rotatably supported by the support member provided on the inner wall surface of the rotating drum. A stopper on the inner wall surface of the support member or on the rotary drum to prevent the rotary drum from rotating more than a certain amount in the direction opposite to the rotation direction of the rotary drum. A rotation blocking member that blocks a certain amount or more of rotation in the same direction as the rotary drum is installed between the support member, the inner wall surface of the rotary drum or the inner wall surface of the rotary drum and the flight. Characterized in that provided on or Re.

[0010]

[Action]

 In the present invention, during use of the recycle drier, the regenerated pavement generating material is heated and regenerated while moving in the longitudinal direction inside the rotating drum, and asphalt mortar and other deposits are accumulated in each flight of the rotating drum. It adheres to, but is removed as follows.

First, when the flight is located directly below the rotary drum, the flight is vertical to the inner surface of the rotary drum with one end side thereof facing downward due to gravity. Along with the rotation of the rotating drum, the flight revolves from directly below the inner wall surface of the rotating drum through the inclined portion to just above and rises. In this case, the flight tries to rotate by gravity with its one end side facing downward, but since the one end side of the flight is supported by the stopper, the flights are balanced in that state. By the revolution of this flight, the supplied recycled pavement generating material is scraped up, and the flight ascends while changing its attitude while the recycled pavement generating material is placed on the flight. Then, this flight takes a horizontal posture, and then changes its posture to a state where one end side of the flight is tilted upward, and the regenerated pavement generation material gradually falls from the flight due to gravity. .

When the flight is located just above the rotary drum due to the rotation of the rotary drum, the flight is in a posture with one end side facing upward, and the pavement generation material to be regenerated by gravity from the flight is rotated. Gradually falls to the bottom of the drum.

Further, when the flight passes directly above the rotary drum as the rotary drum rotates, one end side with a large rotational moment loses the balance state, and the one end side is inverted and turned downward. To try. One end side of the flight is turned over by a certain amount, and then turned further by the turning preventing member. Along with this, the regenerated paving material adhered to the fly is peeled off from the flight surface by the impact force of the flight whose rotation is blocked by the rotation prevention member, so that the regenerated paving material is generated on the flight of the rotating drum. Generation / accumulation of material deposits is prevented.

[0014]

【Example】

 An embodiment of the present invention will be described below with reference to the drawings. 1 to 3 show a recycled pavement material adhesion preventing device for a recycle dryer according to an embodiment of the present invention.

In the drawing, reference numeral 1 is a rotary drum type dryer installed on a pedestal 2 with its axis inclined, and includes a rotary drum 3, a hot air stove 3 A provided at one end of the rotary drum 3, and a hot air stove 3 A. A burner 3B provided on the rotary drum 3, a material feeding device 4 including a belt conveyor arranged at one end of the rotary drum 3, and a discharge port 5 provided at the other end of the rotary drum 3.

On the inner wall surface 6 of the rotary drum 3, a plurality of pairs of support brackets 7, 7 facing in the axial direction are provided so as to project along the circumferential direction of the inner wall surface 6 at predetermined intervals. Ring supports 8 and 8 are fixedly attached to the brackets 7 and 7 concentrically with the inner wall surface 6 of the rotary drum 3, respectively.

Each ring support 8 is provided with a plurality of brackets 9 fixed at a predetermined interval along the circumferential direction toward the center of the rotary drum 3. The support brackets 7 and the brackets 9 are annular as a whole. Are arranged in. The support bracket 7, the ring support 8, and the bracket 9 form a support member.

A flight 10 is arranged between the tips of the pair of support brackets 7, 7 and between the tips of the pair of brackets 9, 9, and a support shaft 10A is inserted into a pipe 10S integral with the flight. Both ends of the support shaft 10A are supported by the support brackets 7, 7 and the brackets 9, 9. That is, the flight 10 is rotatably mounted on the support brackets 7, 7 and the brackets 9, 9 with the support shaft 10A as the center. The flights 10 are arranged in a ring-shaped group, and a plurality of the groups are arranged at predetermined intervals along the longitudinal direction of the rotary drum 3. Another flight 10 is also arranged between the flights 10 in the circumferential direction of the rotary drum 3 of this group, and the other flight 10 is arranged as another group configured in one annular shape. The groups are arranged at predetermined intervals along the longitudinal direction of the rotary drum 3. Each of the flights 10 has a V-shaped cross section, the side of one end side 10B from the support shaft 10A is formed longer than the side of the other end side 10C, and the rotation moment thereof is the rotation moment of the other end side 10C. It is getting bigger.

A stopper 11 is fixedly attached to the ring support 8 corresponding to each of the support brackets 7 and 9, and one end side 10B of the flight 10 abuts against the rotation direction X of the rotary drum 3. It is designed to prevent a certain amount of rotation in the opposite direction.

Further, between the tip of the one end side 10 B of the flight 10 and the mounting portion of the inner wall surface 6 of the rotary drum 3, a rotation preventing member made of a cord 12 is attached. A group of a plurality of cords 12 is arranged at a predetermined interval to form a ring shape, and the ring group is arranged at predetermined intervals along the longitudinal direction of the rotary drum 3. Are arranged in. The length of the cord 12 is shorter than the distance connecting the support shaft 10A of the flight 10 and the attachment portion of the cord 12 by a predetermined dimension. Therefore, the cords 12 prevent the flight 10 from rotating more than a certain amount in the same direction as the rotating direction of the rotating drum 3.

Therefore, in the present embodiment, the gas burned in the hot stove 3 A is blown into the rotary drum 3 by the burner 3 B while the rotary drum 3 is rotated. After that, the regenerated pavement generating material made of asphalt, aggregate, etc. is sent into the rotary drum 3 by the material feeding device 4, is sequentially scraped up by the flight 10, and then falls and rolls to the discharge port 5. Stir to flow. During this time, the regenerated pavement generating material is heated and regenerated by the hot air of the hot air oven 3A, and is discharged from the discharge port 5.

While the recycle drier 1 is in use, the regenerated pavement-generating material is heated and regenerated while moving in the rotary drum 3, and the deposits try to attach to the flight 10 of the rotary drum 3. It is removed as follows.

Here, although the rotary drum 3 rotates, the flight 10 is rotatably attached to the support bracket 77 and the brackets 9 and 9, and the rotary moment on one end side 10B thereof is on the other end side. Since it is larger than the rotation moment of 10C, the one end side 10B of the flight 10 tends to become vertical due to gravity as the rotation drum 3 rotates.

Under such circumstances, first, when the flight 10 is located directly below the rotary drum 3, the flight 10 has a rotational moment larger than the rotational moment of the other end side 10C, and one end side 10B faces downward. And is perpendicular to the inner wall surface 6 of the rotating drum 3. As will be described later, the recycled pavement generating material falls into the flight 10. The cord 12 is bent in a loose state.

With the rotation of the rotary drum 3, the flight 10 moves from directly below the inner wall surface 6 of the rotary drum 3 (state a) to a lower inclined portion (state b) to a horizontal state (state c) and an upper inclination. It revolves around the slope (state D) and directly above (state E) and rises. In this case, as described above, the one end side 10B of the flight 10 tries to rotate in the direction opposite to the rotating direction of the rotating drum 3 by gravity, but the one end side 10B of the flight 10 is supported by the stopper 11. Since the flight 10 is in the state, the side of the one end side 10B of the flight 10 is perpendicular to the inner wall surface 6 of the rotating drum 3, and the flight 10 is balanced in that state. By the revolution of the flight 10, the supplied regenerated pavement generating material is scraped up, and the flight 10 rises while changing its posture while the regenerated pavement generating material is placed on the flight 10.

Then, this flight 10 takes a horizontal posture (state C), and further changes its posture to an upper inclined portion (state D) which is inclined with its one end side 10B facing upward. Gravity of the regenerated paving material gradually slips off from the 10 scraping surface.

When the flight 10 is located just above the rotary drum 3 due to the rotation of the rotary drum 3, the flight 10 is in a posture in which one end side 10B is directed upward, and the flight 10 receives gravity from the fly 10. The regenerated pavement generation material gradually falls to the lower part of the rotary drum 3.

Further, when the flight 10 passes directly above the rotating drum 3 (state E) as the rotating drum 3 rotates, the one end side 10B having a large rotational moment loses the balance state and the reversal start portion (state F). Then, the one end side 10B thereof is oriented downward. The one end side 10B of the flight 10 is pulled by the cord 12 and is prevented from rotating beyond a certain level. Along with this, the regenerated pavement generating material adhering to the flight 10 is peeled off from the surface of the flight 10 by the impact force of the flight 10 which is prevented from rotating by the cords 12, so that the flight 10 of the rotating drum 3 is prevented. It is possible to prevent the generation and accumulation of deposits of recycled pavement generation material.

Then, the flight 10 is lowered while revolving in a posture in which it is prevented from being rotated by the cords 12, and the upper inclined portion (state G) is in a horizontal state (state C) and the lower inclined portion ( State re), revolves directly below (state a), and reaches directly below (state a). In the vicinity of the fly 10 just below the lower inclined portion (state B) (state B), the cord 12 is slack, and one end side 10B of the flight 10 faces downward to the inner wall surface 6 of the rotary drum 3. It is vertical.

As described above, with the rotation of the rotary drum 3, the flight 10 is (a) → (b) → (c) → (d) → (e) → (e) → (t) → (ch) ) → (ri) → (b), but the impact force is received by the cord 12 at the reversal start part (to the state), so the regenerated paving material adhered to the flight 10 receives the impact. By the force, it is peeled from the surface of the flight 10, and the generation / accumulation of deposits of the regenerated pavement generation material on the flight 10 of the rotary drum 3 is prevented.

According to the above-mentioned configuration, even if the adhered matter of the regenerated pavement generation material tries to adhere / accumulate inside the rotary drum 3, as the rotary drum 3 rotates, it is immediately above the rotary drum 3 (state). The flight 10 located in (e) is released from the support by the stopper 11 and is inverted by gravity, and one end side 10B thereof is rotated by the cord 12 at the inversion start portion (to the state) in the same direction as the rotating direction of the rotating drum 3. Rotation beyond a certain direction is blocked, and the impact force of flight 10 at that time causes the deposits that adhere to or accumulate on the surface of flight 10 to separate or drop, so that the surface of flight 10 must be regenerated. It is possible to reliably prevent the attachment and accumulation of deposits of pavement generation materials.

As a result, it is possible to prevent the heating efficiency of the rotating drum 3 from being lowered due to the adhered matter on the surface of the flight 10 as much as possible, and it is not necessary to remove the adhered matter deposited or accumulated in the rotary drum 3. Or can be easier.

Although the shape of the flight 10 is V-shaped in cross section in the present embodiment, it is not limited to such a shape and may be, for example, an L-shaped cross section, and is composed of a planar member. You can also do it.

Further, in this embodiment, as the rotation preventing member, the cord 12 is mounted between the tip of the one end side 10 B of the flight 10 and the mounting portion of the inner wall surface 6 of the rotating drum 3. However, without being limited to this, for example, a stopper as a rotation blocking member may be fixedly provided on the ring support 8 or may be provided so as to project from the inner wall surface 6 of the rotary drum 3. One end side 10B of the flight 10 comes into contact with this stopper, and the impact force peels off and drops the deposits that are to be deposited or deposited on the surface of the flight 10.

Further, in this embodiment, the stopper 11 is fixedly attached to the ring support 8, but it can be fixedly attached to the support bracket 7 or the bracket 9, or the stopper 11 of the rotary drum 3 can be attached. It is also possible to project on the inner wall surface 6.

[0036]

[Effect of device]

 As described above, according to the present invention, even if the deposits of the regenerated pavement generation material try to adhere and accumulate in the rotary drum, the flight located immediately above the rotary drum is accompanied by the rotation of the rotary drum. Is released from the support by the stopper and tries to reverse due to gravity, one end side of which is prevented from rotating beyond a certain direction in the same direction as the rotating direction of the rotating drum by the rotation preventing member, and due to the impact force of the flight at that time, Since the adhering matter that is about to be attached / accumulated on the flight surface peels off / falls, it is possible to reliably prevent the adhering / accumulating matter of the regenerated pavement generation material on the flight surface.

As a result, it is possible to suppress the decrease in the heating efficiency of the rotating drum due to the adhered matter on the surface of the flight as much as possible, and it becomes unnecessary to remove the adhered matter that has adhered / accumulated in the rotary drum. Or, there is an effect that can be made easier.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a recycled pavement generation material adhesion preventing device for a recycle dryer according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional side view of the recycle dryer.

FIG. 3 is a cross-sectional view showing a mounted state of the flight shown in FIG.

FIG. 4 is a side view showing a main part of a conventional pavement generation material adhesion preventing device for a recycled dryer.

[Explanation of symbols]

 3 Rotating Drum 6 Inner Wall Surface 10 Flight 10B One End Side 10C Other End Side 11 Stopper 12 Cord-like Body (Rotation Blocking Member)

Claims (1)

[Scope of utility model registration request] 1. A plurality of flights are arranged inwardly on an inner wall surface of a rotating drum for heating and regenerating the regenerated pavement-generating material, and the regenerated pavement-generating material adhered to and deposited on the flights,
In a recycling drier removal prevention device for recycled pavement material that is removed from flights, a flight in which the rotation moment on one end side is greater than the rotation moment on the other end side can be freely rotated on a support member provided on the inner wall surface of the rotating drum. A stopper is provided on the inner wall surface of the support member or the rotating drum, which is attached to the shaft and prevents one end side of the flight from contacting the rotating drum in a direction opposite to the rotating direction of the rotating drum. A rotation blocking member that blocks a certain amount of rotation in the same direction as that of the rotary drum via the support member, the inner wall surface of the rotary drum, or the inner wall surface of the rotary drum and the flight. This is a device for preventing the attachment of recycled pavement materials to recycled dryers.