JP7577355B2 - Conveyor drying device and conveyor drying method - Google Patents

Description

The present invention relates to a conveyor-type drying apparatus that dries an object to be dried while conveying it, and a conveyor-type drying method that uses the conveyor-type drying apparatus.

The present applicant has proposed an apparatus for drying materials while transporting them on a conveyor in which a number of plates form a transport surface (see Patent Document 1). In this apparatus, a pair of endless chains are wound around a pair of sprockets that are horizontally spaced apart from each other and rotate. A number of plates are located between the pair of endless chains, rotatably supported by both of the endless chains by shafts parallel to the width direction, and move with the movement of the endless chains. If the sprocket that rotates the endless chain from top to bottom is the first sprocket and the sprocket that rotates the endless chain from bottom to top is the second sprocket, in the section where the endless chain moves horizontally from the second sprocket to the first sprocket, the plates are held horizontally by the upper rail, and the upper surfaces of the plates form the upper transport surface. Materials to be dried are supplied from above to this upper transport surface and are dried while being transported.

When the plate approaches the first sprocket and comes off the upper rail, it rotates downward around the support shaft due to its own weight, causing the material to fall. The plate, which goes around the first sprocket while hanging from the support shaft, rotates upward around the support shaft while being guided to the lower rail. In the section where the endless chain moves horizontally from the first sprocket to the second sprocket, the plate is held horizontally by the lower rail, and the upper surface of the plate forms the lower conveying surface.

The material to be dried falls as the plate approaches the first sprocket and rotates downward, and is placed on the lower conveying surface and further dried while being conveyed. When the plate approaches the second sprocket and comes off the lower rail, the plate rotates downward around the support shaft due to its own weight, and the material to be dried falls outside the device. The plate, hanging from the support shaft and going around the second sprocket, rotates upward around the support shaft while being guided to the upper rail.

With the device of Patent Document 1 having such a configuration, the material to be dried is supplied to the upper conveying surface, while being transported on both the upper and lower conveying surfaces and dried, and the dried material that falls due to the rotation of the plate approaching the second sprocket is collected, thereby allowing the drying process to be carried out continuously.

However, in the device of Patent Document 1, the material to be dried that is transported on the upper transport surface and approaches the first sprocket is not yet sufficiently dried. Therefore, the material to be dried adheres to the plate and does not fall when the plate approaches the first sprocket and rotates downward. If the plate with the material to be dried still attached rotates around the first sprocket and the material falls in the process, there is no horizontal plate below to receive the material, so the undried material falls onto the installation surface of the device. This causes problems such as insufficient drying and failure to recover all of the material to be dried.

International Publication No. 2016/046928

In view of the above-mentioned situation, the present invention has an object to provide a conveying-type drying apparatus that dries materials to be dried while transporting them, which can perform a drying process sufficiently while reducing the amount of materials to be dried that cannot be recovered, and a conveying-type drying method that uses the conveying-type drying apparatus.

In order to solve the above problems, the conveyor-type drying device according to the present invention is
"A conveyor-type drying device that dries the material to be dried while conveying it,
A pair of endless chains;
a plurality of pairs of sprockets around which the pair of endless chains are respectively wound;
a plurality of plates located between the pair of endless chains and attached to both of the endless chains so as to be rotatable about support shafts parallel to the width direction, thereby moving in accordance with the movement of the endless chains;
The plurality of pairs of sprockets include a pair of first sprockets, a pair of second sprockets, a pair of third sprockets, and a pair of fourth sprockets, around which the pair of endless chains are wound in sequence and which rotate in conjunction with each other,
The first sprocket is at the same height as the second sprocket, and the endless chain is rotated from top to bottom to move the endless chain horizontally toward the second sprocket;
The second sprocket rotates the endless chain fed from the first sprocket from bottom to top,
The third sprocket has a lower end at the same height as an upper end of the second sprocket, and moves the endless chain horizontally between the third sprocket and the second sprocket and rotates the endless chain from bottom to top.
The fourth sprocket is located above the first sprocket and raises the endless chain sent out from the third sprocket, and then rotates it from top to bottom to send it to the first sprocket.
The plate is
While moving from the second sprocket to the third sprocket, the conveyor is supported by an upper rail to form an upper conveying surface on which the material to be dried is placed in a horizontal state,
When the material is sent from the third sprocket to the fourth sprocket, it rotates downward around the support shaft due to its own weight, rises while hanging from the support shaft, and then goes around the fourth sprocket and is sent to the first sprocket.
When the material is fed from the first sprocket to the second sprocket, the material is guided to a lower rail and rotates upward around the support shaft,
While moving toward the second sprocket, the lower rail is supported to form a lower conveying surface on which the material to be dried is placed in a horizontal state,
When the endless chain is rotated from bottom to top by the second sprocket, it rotates downward around the support shaft due to its own weight, and then rotates upward around the support shaft while being guided to the upper rail while going around the second sprocket.

The "material to be dried" is something that can be dropped during the drying process without any problems, and examples of this include livestock manure, compost, sludge, and food waste.

In the device of Patent Document 1, the pair of endless chains are wound around only the first and second sprockets, whereas in the present configuration, the endless chains are also wound around the third and fourth sprockets. The lower end of the third sprocket is at the same height as the upper end of the second sprocket, and the fourth sprocket is above the first sprocket. Therefore, when the plate is sent from the third sprocket to the fourth sprocket, the plate rotates downward around the support shaft and rises toward the fourth sprocket while hanging from the support shaft. In this way, there is a stage where the plate is raised while hanging before going around the fourth sprocket, so the material to be dried that is attached to the plate is likely to fall off during that time.

In addition to the above configuration, the conveyor-type drying device according to the present invention further comprises:
"The scraping device further includes a long rod-shaped rotating shaft that is suspended from the support shaft and rotates facing the plate moving upward from the third sprocket to the fourth sprocket, and a plurality of scraping rods extending from the rotating shaft in a direction perpendicular to the rotation axis ."

The conveying type drying apparatus of this configuration includes a scraping device having a rotating shaft and a number of scraping rods. The rotating shaft rotates facing a plate (hereinafter, sometimes referred to as the "rising plate") that is suspended from a support shaft and rising from the third sprocket to the fourth sprocket. A number of scraping rods extend from the rotating shaft in a direction perpendicular to the rotating shaft. Therefore, by rotating the scraping rods together with the rotating shaft, even if the material to be dried is attached to the rising plate, the material to be dried can be scraped off by the scraping rods.

In addition to the above configuration, the conveyor-type drying device according to the present invention further comprises:
" The rotation of the third sprocket is transmitted to the rotating shaft via a plurality of driven rotors which rotate in response to the third sprocket, so that the rotating shaft rotates in response to the third sprocket, but the rotation direction of the rotating shaft is opposite to the rotation direction of the third sprocket, and therefore the scraping rod rotates from top to bottom relative to the plate which rises via the third sprocket ."

Since the rotating shaft rotates following the third sprocket, the rotating shaft can be rotated by the mechanism that drives the rotation of the endless chain, which has the advantage that no additional dedicated power is required to rotate the scraping rod.

Here, an example of a configuration in which the rotating shaft is "rotated by the third sprocket" is a configuration in which the rotating shaft rotates integrally with a driven rotor to which the rotation of the third sprocket is transmitted. In this case, the driven rotor can be, for example, a sprocket or pulley to which the rotation of the third sprocket is transmitted by a chain or belt, or a gear that meshes with a gear that rotates integrally with the third sprocket.

Alternatively, the rotating shaft may be "rotated by the third sprocket" by transmitting the rotation of the third sprocket to the rotating shaft via a plurality of driven rotors. In this case, the plurality of driven rotors may be a combination of a plurality of gears, a combination of a plurality of sprockets or pulleys, or a combination of a gear and a sprocket or pulley. In this way, transmitting the rotation of the third sprocket to the rotating shaft via a plurality of driven rotors makes it possible to change the positional relationship between the third sprocket and the rotating shaft, the rotational direction of the rotating shaft, and the rotational speed of the rotating shaft.

Next, the conveying type drying method according to the present invention is as follows:
"A conveyor-type drying method using the conveyor-type drying device described above,
A material to be dried is supplied onto the plurality of plates forming the upper conveying surface;
When the plate is sent from the third sprocket to the fourth sprocket, the plate rotates downward around the support shaft, so that the material to be dried is dropped from the plate, and the material to be dried is placed on the plurality of plates forming the lower conveying surface;
The plate is raised toward the fourth sprocket while being suspended from the support shaft, thereby dropping any objects to be dried that have not yet fallen, and
The material to be dried adhering to the plate, which is suspended from the support shaft and rising toward the fourth sprocket, is scraped off by the scraping rod, which rotates as the rotating shaft rotates.

This is a conveying drying method using a conveying drying apparatus equipped with a scraping device. By providing a stage in which the plate is raised in a suspended state, the material to be dried can be easily dropped from the plate even if it is attached, and the material to be dried can be more reliably dropped onto the plate forming the lower conveying surface because the material to be dried is scraped off by the rotation of the scraping rod. This reduces the amount of material to be dried that falls onto the installation surface of the apparatus without being dried, so that almost the entire amount of material to be dried supplied to the upper conveying surface can be dried and then dropped and collected from the lower conveying surface.

As described above, according to the present invention, it is possible to provide a conveying-type drying apparatus that dries materials to be dried while transporting them, which can thoroughly perform drying processing and reduce the amount of materials to be dried that cannot be recovered, and a conveying-type drying method that uses the conveying-type drying apparatus.

1 is a configuration diagram of a conveyor-type drying device according to an embodiment of the present invention; FIG. 2 is an enlarged view of a main part of the conveyor-type drying device of FIG. 1 . FIG. 2 is a perspective view of a main part of the conveyor-type drying device of FIG. 1 . FIG. 4 is an enlarged view of range A in FIG. 3 . 4A and 4B are explanatory diagrams of the operation of the scraping device in the conveyor-type drying apparatus of FIG. 1 . 2A is a perspective view of a scraping device in the conveyor-type drying apparatus of FIG. 1 , and FIG. 2B is a perspective view of a scraping device of a modified example.

Hereinafter, a conveyor-type drying apparatus 1 according to an embodiment of the present invention will be described with reference to the drawings. Here, a case where the present invention is applied to a conveyor-type drying apparatus that conveys and dries chicken droppings that are discharged in large quantities from chicken coops every day will be described as an example.

The conveyor-type drying apparatus 1 of this embodiment conveys poultry manure containing moisture as the material to be dried. Air is supplied to the space in which the conveyor-type drying apparatus 1 is installed by a ventilation device. The material to be dried is dried by the circulation of air while being conveyed. For example, the conveyor-type drying apparatus 1 is placed in a building adjacent to a large chicken coop in which many birds are raised in multi-tiered cages. Air warmed by the body temperature of the birds in the chicken coop is exhausted from the chicken coop by an exhaust fan and simultaneously supplied to the space in which the conveyor-type drying apparatus 1 is installed.

The conveyor-type drying device 1 includes a pair of endless chains, a plurality of pairs of sprockets around which the pair of endless chains are respectively wound, and a large number of plates 30 that move as the pair of endless chains rotate.

The conveyor-type drying device 1 has multiple pairs of sprockets, including a pair of first sprockets 11, a pair of second sprockets 12, a pair of third sprockets 13, and a pair of fourth sprockets 14. The casing of the conveyor-type drying device 1 has two pairs of side walls, and the first sprocket 11, the second sprocket 12, the third sprocket 13, and the fourth sprocket 14 are rotatably supported on one pair of opposing side walls 90 at the same height so as to face their respective counterparts.

The first sprocket 11 and the second sprocket 12 have the same diameter, tooth pitch, and height. The third sprocket 13 has the same tooth pitch as the first sprocket 11 and the second sprocket 12, but a smaller diameter. The third sprocket 13 is located between the first sprocket 11 and the second sprocket 12, and closer to the first sprocket 11. The height of the bottom end of the third sprocket 13 is equal to the height of the top ends of the first sprocket 11 and the second sprocket 12.

The fourth sprocket 14 has the same diameter and tooth pitch as the first sprocket 11 and the second sprocket 12. The fourth sprocket 14 is located above the first sprocket 11, but slightly closer to the third sprocket 13 than directly above the first sprocket 11. A line extending vertically from the end of the fourth sprocket 14 facing the third sprocket 13 approximately coincides with a line extending vertically from the end of the third sprocket 13 facing the fourth sprocket 14.

The endless chain is wound around the multiple types of sprockets arranged in this manner, in the order of the first sprocket 11, the second sprocket 12, the third sprocket 13, and the fourth sprocket 14. The endless chain rotates from top to bottom along the first sprocket 11, rotates from bottom to top along the second sprocket 12, rotates from bottom to top along the third sprocket 13, and rotates from top to bottom along the fourth sprocket 14.

A motor 95 is installed on the top surface 91 of the casing to rotate the rotating shafts 14a of the pair of fourth sprockets 14. An endless chain 72 is wound around a sprocket 95p that rotates integrally with the output shaft of the motor 95 and a sprocket 14p that rotates integrally with the rotating shafts 14a of the fourth sprocket 14. This causes the rotating shafts 14a of the fourth sprocket 14 to rotate when driven by the motor 95. Although not shown in the figure, the second sprocket 12 is also provided with a mechanism that drives the rotation of the fourth sprocket 14, and the rotations of both are synchronized. Therefore, when both rotation drive mechanisms are operated, the second sprocket 12 and the fourth sprocket 14 rotate in the same direction at the same speed, and the pair of endless chains rotates while rotating the third sprocket 13 and the first sprocket 11.

The endless chain is formed by connecting a large number of link pairs, each of which is made up of two parallel link plates 22, rotatably connected by connecting pins 23. The connecting pins 23 have free rollers 25 inserted between the two link plates 22, and the free rollers 25 rotate freely around the connecting pins 23. In each of the pair of endless chains, the connecting pins 23 extend beyond the inner link plate 22 at a constant interval. A plurality of plates 30 are rotatably connected from both sides by the connecting pins 23 extending inward from each of the endless chains while positioned between the pair of endless chains. Therefore, the axial centers of the connecting pins 23 that connect the plates 30 at a constant interval among the connecting pins 23 correspond to the support shafts 21 of the present invention.

Each plate 30 has a plate body 31 which is a rectangular flat plate having many small holes (not shown) formed therein, and a side surface portion 32 which extends in one direction at a right angle from a pair of sides in the width direction of the plate body 31. The above-mentioned connecting pin 23, whose axis is the support shaft 21, is inserted through this side surface portion 32 and then fastened. A guide roller 40 is attached to the side surface portion 32 by a rotating shaft 42 at a position separated from the support shaft 21 so as to be rotatable. The guide roller 40 attached to the plate 30 and the free roller 25 incorporated in the endless chain both roll on a rail.

The rails include a pair of upper rails 81 that guide the rolling of the guide rollers 40 and the free rollers 25 when the plate 30 moves from the second sprocket 12 to the third sprocket 13, and a pair of lower rails 82 that guide the rolling of the guide rollers 40 and the free rollers 25 when the plate 30 moves from the first sprocket 11 to the second sprocket 12. The upper rails 81 and the lower rails 82 are attached to a pair of side walls 90 of the casing so as to extend horizontally, respectively.

The upper rail 81 extends from near the upper end of the second sprocket 12 to near the lower end of the third sprocket 13 at a height slightly lower than the upper end of the second sprocket 12 and the lower end of the third sprocket 13. The lower rail 82 extends from near the lower end of the first sprocket 11 toward the second sprocket 12 at a height slightly lower than the lower ends of the first sprocket 11 and the second sprocket 12. A gap equal to or greater than the length of one of the plates 30 in the traveling direction is provided between the end of the lower rail 82 and the second sprocket 12.

A guide surface 83 is provided radially outward of the first sprocket 11 and slightly spaced from the first sprocket 11, curving in an arc along the outer periphery of the first sprocket 11, with the lower end of the guide surface 83 reaching the lower rail 82. The diameter of the arc of the guide surface 83 is set to be slightly larger than the diameter of the first sprocket 11. A guide surface 84 is provided radially inward of the second sprocket 12 and slightly spaced from the second sprocket 12. The diameter of the arc of the guide surface 84 is set to be slightly smaller than the diameter of the second sprocket 12. The upper end of the guide surface 84 reaches the upper rail 81.

Furthermore, a guide surface 85 is provided vertically from slightly below the end of the third sprocket 13 on the fourth sprocket 14 side to slightly below the end of the fourth sprocket 14 on the third sprocket 13 side. This is the surface along which the rollers 40 of the plate 30, which is sent out from the third sprocket 13 and rises toward the fourth sprocket 14 in a suspended state, are guided.

In addition to the above configuration, the conveying type drying device 1 of this embodiment is equipped with a scraping device 50. The scraping device 50 has a rotating shaft 50a that rotates following the third sprocket 13, and a plurality of scraping rods 51. The rotating shaft 50a is long and rod-shaped, and both ends thereof are rotatably attached to each of a pair of side walls 90. Both ends of the rotating shaft 50a penetrate the side walls 90, respectively, and a first driven rotor that rotates coaxially and integrally is provided at each end. On the other hand, both ends of the rotating shaft 13a of the third sprocket 13 also penetrate the side walls 90, respectively, and a sprocket 13p that rotates coaxially and integrally is provided at each end. In each of the side walls 90, a second driven rotor is rotatably attached to the side walls 90 between the sprocket 13p and the first driven rotor. The rotation of the rotating shaft 13a is transmitted to the first driven rotor via the second driven rotor. In this example, the second driven rotor is composed of a sprocket 60p and a spur gear 60g that rotate coaxially and integrally, and the first driven rotor is a spur gear 50g that meshes with the spur gear 60g. An endless chain 71 is wound around the sprocket 60p and the sprocket 13p.

With this configuration, when the rotating shaft 13a of the third sprocket 13 rotates, the rotation of the sprocket 13p, which rotates integrally with the rotating shaft 13a, is transmitted to the sprocket 60p via the endless chain 71. As a result, the spur gear 60g, which rotates integrally with the sprocket 60p, rotates in the same direction as the rotating shaft 13a, and the spur gear 50g meshing with the spur gear 60g rotates in the opposite direction. As a result, the rotating shaft 50a, which rotates integrally with the spur gear 50g, rotates in the opposite direction to the rotating shaft 13a. In addition, because the diameter of the sprocket 60p is smaller than the diameter of the sprocket 13p and the number of teeth of the spur gear 50g is set to be smaller than the number of teeth of the spur gear 60g, the rotation speed of the rotating shaft 50a is increased in comparison with the rotation speed of the third sprocket 13. In this way, by transmitting the rotation of the rotating shaft 13a to the rotating shaft 50a via the multiple driven rotors, it is possible to adjust the positional relationship between the rotating shaft 13a and the rotating shaft 50a, the rotational direction of the rotating shaft 50a, and the rotational speed of the rotating shaft 50a. The position of the rotating shaft 50a is set so as to face the guide surface 85 above the third sprocket 13.

A plurality of scraping rods 51 are attached to the rotating shaft 50a in a direction perpendicular to the axis of rotation of the rotating shaft 50a. The length of the scraping rods 51 is set so that the distance between the tip of the scraping rod 51 and the guide surface 85 is slightly greater than the thickness of the plate 30 when the tip of the scraping rod 51 approaches the guide surface 85 most closely due to the rotation of the rotating shaft 50a.

In the space below the third sprocket 13, an impact plate 88 is supported by a support bar (not shown) attached to the side wall 90 of the casing. The position of the impact plate 88 is set directly below the support shaft 21 at the time when the guide roller 40 of the plate 30 sent out from the third sprocket 13 toward the fourth sprocket 14 leaves the end of the upper rail 81.

With the above configuration, in the conveyor-type drying device 1 of this embodiment, a conveying surface is formed by the multiple plates 30. Since each plate 30 is connected to the endless chain by the support shaft 21, it moves with the movement of the endless chain that is wound around the first sprocket 11 to the fourth sprocket 14. The lower ends of the first sprocket 11 and the second sprocket 12 are at the same height, and the lower end of the third sprocket 13 is at the same height as the upper end of the second sprocket 12. Therefore, the endless chain that rotates from top to bottom on the first sprocket 11 moves horizontally toward the lower end of the second sprocket 12 (referred to as "downward movement"), rotates from bottom to top on the second sprocket 12, and then moves horizontally toward the third sprocket 13 (referred to as "upward movement").

The guide rollers 40, which are rotatably attached around the rotation shafts 42 to both side portions 32 of each plate 30, roll on the upper rail 81 as the plate 30 moves upward, and roll on the lower rail 82 as the plate 30 moves downward. The heights of the upper rail 81 and the lower rail 82 are set in relation to the height of the support shaft 21 connected to the endless chain so that the plate 30 is horizontal while the guide rollers 40 are rolling on the rails. In this embodiment, the free rollers 25 of the endless chain also roll on the upper rail 81 and the lower rail 82.

In addition, the support shaft 21 connecting the plates 30 to the endless chain moving upward is located forward of the rotation shaft 42 of the guide roller 40. As a result, the plates 30 move by being pulled by the endless chain moving upward. An upper conveying surface S1 is formed by the multiple plates 30 moving horizontally along the upper rail 81. The material to be dried can be placed on the upper conveying surface S1 and conveyed by supplying the material to be dried to the upper conveying surface S1 by a supplying device such as a conveyor belt or a hopper.

When the upwardly moving plate 30 reaches the third sprocket 13, the third sprocket 13, which rotates the endless chain from bottom to top, changes the traveling direction of the plate to an upward direction, and sends it out toward the fourth sprocket 14. When the guide roller 40 comes off the end of the upper rail 81, the plate 30 rotates downward around the support shaft 21 due to its own weight. The rotation of the plate 30 causes the objects to be dried that had been placed thereupon to fall. As the plate 30 rotates downward, it collides with the collision plate 88, and the objects to be dried that have been attached to the plate 30 can be brushed off by the impact.

The plate 30, suspended from the support shaft 21 and supported by the endless chain, rises toward the fourth sprocket 14. At this time, the rollers 40 come into contact with the guide surfaces 85, thereby guiding the vertical ascent of the plate 30. In this way, since there is a stage in which the plate 30 rises vertically in a suspended state, even if the material to be dried is attached to the plate 30, it is likely to fall off at this stage.

Since the rotating shaft 50a faces the guide surface 85, the surface of the rising plate 30 that formed the upper conveying surface S1 faces the rotating shaft 50a. Therefore, even if the material to be dried adheres to the plate 30, the material is scraped off by the scraping rod 51 that rotates with the rotation of the rotating shaft 50a. In particular, since the rotation direction of the rotating shaft 50a is opposite to the rotation direction of the third sprocket 13, the scraping rod 51 rotates downward relative to the rising plate 30. This makes it possible to more reliably drop the material to be dried that adheres to the plate 30 by interference with the scraping rod 51.

After that, the plate 30 goes around the fourth sprocket 14 and is further sent toward the first sprocket 11. Then, the plate 30 moves together with the endless chain rotating from top to bottom on the first sprocket 11, and is sent from the first sprocket 11 toward the second sprocket 12. At that time, the guide roller 40 is guided by the guide surface 83 curved in an arc shape, so that the plate 30 gradually rotates upward around the support shaft 21. When the guide roller 40 reaches the lower rail 82, the plate 30 moves in a horizontal state while rolling the guide roller 40 on the lower rail 82. At this time, the same surface that formed the upper conveying surface S1 faces upward and forms the lower conveying surface S2. As described above, the material to be dried that falls when the plate 30 reaches the third sprocket 13 and is sent to the fourth sprocket 14 is placed on the lower conveying surface S2 and conveyed. Note that when the endless chain moves downward, the support shaft 21 is behind the rotating shaft 42, so the plate 30 moves as if it is pushed by the endless chain.

When the plate 30 approaches the second sprocket 12 and the guide roller 40 comes off the end of the lower rail 82, the plate 30 rotates around the support shaft 21 due to its own weight. This rotation of the plate 30 causes the material to fall. The plate 30 suspended from the support shaft 21 moves upward together with the endless chain rotating from bottom to top on the second sprocket 12. At that time, the guide roller 40 is guided by the arc-shaped guide surface 84, and the plate 30 gradually rotates upward around the support shaft 21. When the guide roller 40 reaches the upper rail 81 and the plate 30 moves toward the third sprocket 13 while rolling the guide roller 40 on the upper rail 81, the plate 30 becomes horizontal again and the upper conveying surface S1 is formed. The material to be dried is supplied to the upper conveying surface S1, and the above operation is repeated thereafter.

In this way, in the conveyor-type drying device 1, the objects to be dried are dried while being conveyed on the upper conveying surface S1 and the lower conveying surface S2 formed by the multiple plates 30 that move with the revolution of the endless chain. Since the plate body 31 is provided with a large number of small holes, air flows through the plates 30 and the objects to be dried placed on the plates 30. This allows the objects to be conveyed to be dried efficiently.

The material to be dried is supplied to the upper conveying surface S1 at the initial stage of the upward movement of the endless chain, is dropped onto the lower conveying surface S2 at the end of the upward movement, and is then dropped outside the device at the end of the downward movement, thereby enabling the material to be continuously supplied, conveyed, dried and discharged.

The dried material that has dropped from the plate 30 at the end of the downward movement is discharged outside the system by a discharge device such as a screw conveyor or a mobile scraper. Alternatively, a plurality of conveying-type drying devices 1 having the same configuration may be stacked, and the material discharged from the conveying-type drying device 1 in the upper tier may be supplied to the conveying-type drying device 1 in the lower tier, and further dried while being conveyed.

The present invention has been described above with reference to preferred embodiments, but the present invention is not limited to the above embodiments, and various improvements and design changes are possible without departing from the spirit of the present invention.

For example, in the above embodiment, the scraping device 50 has a needle-shaped scraping rod 51, but as shown in Fig. 6B, a scraping device 50B may be used that includes a scraping rod 55 having a blade at the tip. Also, a scraping device having only the scraping rod 55 may be used.

In the above embodiment, the rotating shaft 50a rotates following the third sprocket 13, but a dedicated rotation drive mechanism may be provided to drive the rotation of the rotating shaft 50a. In this case, the rotation of the rotating shaft 50a does not need to be synchronized with the rotation of the first sprocket 11 to the fourth sprocket 14.

Claims (4)

A conveying type drying device that dries an object to be dried while conveying the object,
A pair of endless chains;
a plurality of pairs of sprockets around which the pair of endless chains are respectively wound;
a plurality of plates located between the pair of endless chains and attached to both of the endless chains so as to be rotatable about support shafts parallel to the width direction, thereby moving in accordance with the movement of the endless chains;
The plurality of pairs of sprockets include a pair of first sprockets, a pair of second sprockets, a pair of third sprockets, and a pair of fourth sprockets, around which the pair of endless chains are wound in sequence and which rotate in conjunction with each other,
The first sprocket is at the same height as the second sprocket, and the endless chain is rotated from top to bottom to move the endless chain horizontally toward the second sprocket;
The second sprocket rotates the endless chain fed from the first sprocket from bottom to top,
The third sprocket has a lower end at the same height as an upper end of the second sprocket, and moves the endless chain horizontally between the third sprocket and the second sprocket and rotates the endless chain from bottom to top.
The fourth sprocket is located above the first sprocket and raises the endless chain sent out from the third sprocket, and then rotates it from top to bottom to send it to the first sprocket.
The plate is
While moving from the second sprocket to the third sprocket, the conveyor is supported by an upper rail to form an upper conveying surface on which the material to be dried is placed in a horizontal state,
When the material is sent from the third sprocket to the fourth sprocket, it rotates downward around the support shaft due to its own weight, rises while hanging from the support shaft, and then goes around the fourth sprocket and is sent to the first sprocket.
When the material is fed from the first sprocket to the second sprocket, the material is guided to a lower rail and rotates upward around the support shaft,
While moving toward the second sprocket, the lower rail is supported to form a lower conveying surface on which the material to be dried is placed in a horizontal state,
When the endless chain is rotated from bottom to top by the second sprocket, the endless chain rotates downward around the spindle due to its own weight, and then rotates upward around the spindle while being guided to the upper rail while going around the second sprocket,
a scraping device including a long rod-shaped rotating shaft that is suspended from the support shaft and rotates facing the plate moving upward from the third sprocket to the fourth sprocket, and a plurality of scraping rods extending from the rotating shaft in a direction perpendicular to the rotation axis ,
The rotation of the third sprocket is transmitted to the rotating shaft via a plurality of driven rotors that rotate following the third sprocket, so that the rotating shaft rotates following the third sprocket, but the rotating direction of the rotating shaft is opposite to the rotating direction of the third sprocket, so that the scraping rod rotates from top to bottom relative to the plate that rises via the third sprocket.
A conveyor-type drying device characterized by the above. The conveying-type drying device according to claim 1, characterized in that the multiple driven rotors include multiple gears with different numbers of teeth, and the multiple gears mesh with each other, so that the rotating shaft of the scraping device rotates at a speed higher than the rotational speed of the third sprocket . The conveying-type drying device according to claim 1 or 2, characterized in that the rotation of the third sprocket is transmitted to the rotating shaft of the scraping device via a plurality of the driven rotors, so that the rotating shaft driven by the rotation of the third sprocket is located at a higher position than the rotation axis of the third sprocket . A conveying-type drying method using the conveying-type drying device according to claim 1 ,
A material to be dried is supplied onto the plurality of plates forming the upper conveying surface;
When the plate is sent from the third sprocket to the fourth sprocket, the plate rotates downward around the support shaft, so that the material to be dried is dropped from the plate, and the material to be dried is placed on the plurality of plates forming the lower conveying surface;
The plate is raised toward the fourth sprocket while being suspended from the support shaft, thereby dropping any objects to be dried that have not yet fallen, and
A conveying drying method characterized in that the material to be dried adhering to the plate, which is suspended from the support shaft and rising toward the fourth sprocket, is scraped off by the scraping rod, which rotates as the rotating shaft rotates.

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