JP5405985B2 - Drying equipment and screw conveyor - Google Patents

Description

  The present invention relates to a screw conveyor that houses a spiral wing that rotates inside a cylindrical casing, and a drying device that dries while transporting an object to be dried by the screw conveyor.

  Conventionally, as a drying device that efficiently dries the object to be dried in a short time, the screw conveyor is covered with a heat source, and the screw conveyor conveys the object to be dried (conveyed object) while utilizing the heat conduction from the heat source. A vertical drying apparatus that heats and uniformly dries the object to be dried is used (see, for example, Patent Document 1).

  In this vertical drying apparatus, a screw conveyor 101 shown in FIG. 10 is used. In the screw conveyor 101, a rotating shaft 103 is attached to the inner center of a cylindrical casing 102, and a spiral wing body 104 is formed on the outer peripheral surface of the rotating shaft 103. The rotating shaft 103 is connected to the drive motor 105 at the upper end of the casing 102, and is supported by a bearing 106 at the lower end of the casing 102. The casing 102 is formed with an inlet 107 for feeding an object to be dried at the lower end, and an outlet 108 for discharging the object to be dried at the upper end.

  Then, the drive motor 105 is driven to rotate the rotating shaft 103 so that the material to be dried is conveyed upward from the inlet 107 to the outlet 108.

  In the screw conveyor 101 used in this conventional drying apparatus, as shown in FIG. 10B, the wing body 104 is formed in a horizontal shape perpendicular to the rotating shaft 103 and the inner wall surface of the casing 102. Yes.

  In the conventional drying device, centrifugal force acts on the object to be dried by rotating the wing body 104, the object to be dried is pressed against the inner wall surface of the casing 102, and the action of the frictional force generated by the reaction force. The object to be dried slides on the wing body 104 to obtain an ascending force and is transported upward without falling down, and the object to be dried by heat conduction from the heat source on the inner wall surface of the casing 102 Is supposed to be dried.

JP 2002-235984 A

  However, in the screw conveyor 101 used in the above-described conventional drying apparatus, the blade body 104 is formed orthogonal to the inner wall surface of the casing 102, so that the object to be dried is pressed toward the inner wall surface of the casing 102. Since the force is generated only by the centrifugal force generated by the rotation of the wing body 104, the ascending force generated on the object to be dried is small, and the object to be dried easily falls down along the wing body 104, and it takes a long time to transport and dry. In addition, the wing body 104 had to be rotated at a high speed in order to increase the centrifugal force.

Therefore, in the present invention according to claim 1, a spiral wing body is rotatably arranged inside a cylindrical casing, and the object to be dried is rotated from the base end of the casing by the rotating spiral wing body. In a drying apparatus that performs drying while transporting toward the distal end portion, the outer peripheral edge portion of the wing body is formed so as to be inclined toward the proximal end portion side rather than orthogonally with respect to the inner wall surface of the casing. A circulation path that provides a rotation shaft, forms a wing body on the outer peripheral surface of the rotation shaft, forms a circulation path for circulating the material to be dried inside the rotation shaft, and communicates with the circulation path at the tip of the rotation shaft While forming the inlet, a circulation path outlet communicating with the circulation path is formed at the base end portion of the rotation shaft, and the inner peripheral edge of the blade body at the tip is closer to the tip than the orthogonal to the outer peripheral surface of the rotation shaft. It was decided to incline toward the surface .

  Further, in the present invention according to claim 2, in the present invention according to claim 1, the base end of the wing body is formed at the base end of the casing while forming an input port for supplying the material to be dried. It was decided to form so as to be orthogonal to the inner wall surface of the casing.

Further, in the present invention according to claim 3 , a spiral wing body is rotatably disposed inside a cylindrical casing, and the object to be conveyed is rotated from the base end of the casing by the rotating spiral wing body. In the screw conveyor that conveys toward the front end, the outer peripheral edge of the wing body is formed to be inclined toward the base end side rather than perpendicular to the inner wall surface of the casing, and a cylindrical rotating shaft is provided in the casing At the same time, a wing body is formed on the outer peripheral surface of the rotating shaft, a circulation path for circulating the conveyed object is formed inside the rotating shaft, and a circulation path inlet communicating with the circulation path is formed at the tip of the rotating shaft. On the other hand, a circulation path outlet that communicates with the circulation path is formed at the base end of the rotating shaft, and the inner peripheral edge of the blade body at the distal end is inclined toward the distal end side rather than perpendicular to the outer peripheral surface of the rotating shaft. Decided to form .

  And in this invention, there exists an effect described below.

  That is, in the present invention, a spiral wing body is rotatably disposed inside a cylindrical casing, and the object to be dried is directed from the base end portion of the casing to the tip end portion by the rotating spiral wing body. In a drying device that performs drying while transporting, the outer peripheral edge of the wing body is inclined to the base end side rather than perpendicular to the inner wall surface of the casing. As the object to be dried can be pressed against the inner wall surface of the casing not only by the centrifugal force caused by the force but also by the component force along the wing of the gravity acting on the object to be dried, the ascending force generated on the object to be dried And the material to be dried is less likely to fall downward along the wing body, and the conveyance and drying can be performed in a short time without increasing the rotation speed of the wing body.

  In particular, when the base end of the casing is formed with an inlet for feeding the material to be dried and the wing body at the base end is formed so as to be orthogonal to the inner wall surface of the casing, The material to be dried thrown in at the base end can be scooped up well at the base end of the wing body, and the material to be dried can be prevented from clogging at the base end of the wing body.

  In addition, the casing is provided with a cylindrical rotating shaft, a wing body is formed on the outer peripheral surface of the rotating shaft, a circulation path for circulating the material to be dried is formed inside the rotating shaft, and the tip of the rotating shaft is formed. While forming a circulation path inlet that communicates with the circulation path, a circulation path outlet that communicates with the circulation path is formed at the base end portion of the rotation shaft, and the inner peripheral edge of the blade body at the distal end portion with respect to the outer peripheral surface of the rotation shaft If it is decided to incline toward the tip side rather than perpendicular, the material to be dried can be smoothly introduced from the wing body to the circulation path at the circulation path inlet, and the object to be dried is dried at the circulation path inlet. It is possible to prevent clogging.

  Further, in the present invention, a spiral wing body is rotatably disposed inside a cylindrical casing, and the object to be conveyed is directed from the base end portion to the tip end portion of the casing by the rotating spiral wing body. In the screw conveyor to be transported, the outer peripheral edge of the wing body is inclined toward the base end side rather than perpendicular to the inner wall surface of the casing. In addition, since the object to be conveyed can be pressed against the inner wall surface of the casing by the component force in the direction along the wing of the gravity acting on the object to be conveyed, the rising force generated on the object to be dried increases. The object to be dried is less likely to drop downward along the wing body, and the conveyance can be performed in a short time.

Side surface partial sectional drawing which shows a drying apparatus. FIG. Explanatory drawing which shows the inclination-angle of a wing | blade body. Side surface partial sectional drawing which shows a screw conveyor. FIG. Side surface partial sectional drawing which shows another screw conveyor. FIG. Side surface partial sectional drawing which shows another drying apparatus. FIG. Side surface sectional drawing (a) and side surface sectional drawing (b) which show the conventional screw conveyor.

  Below, the specific structure of the drying apparatus and screw conveyor which concern on this invention is demonstrated, referring drawings.

Example 1
As shown in FIGS. 1 to 3, the drying apparatus 1 covers a circulation conveyance mechanism 2 that conveys a material to be dried while circulating it with a heating mechanism 3 serving as a heat source, and causes the material to be dried to circulate by the circulation conveyance mechanism 2. While being conveyed, the object to be dried is heated by the heating mechanism 3 so that the object to be dried is dried evenly and efficiently.

  A specific configuration of the drying device 1 will be described below by dividing it into a circulation conveyance mechanism 2 and a heating mechanism 3.

  First, the configuration of the heating mechanism 3 will be described. The heating mechanism 3 surrounds the outer periphery of the intermediate portion from the lower end portion (base end portion) of the circulation transport mechanism 2 with a hollow cylindrical main body 4, and the upper end portion (tip end) of the main body 4. A supply port 5 for supplying heating steam to the supply port 5, and a supply source of heating steam is connected to the supply port 5 via a supply pipe 6, while heating steam is connected to the lower end (base end) of the main body 4. A discharge port 7 for discharging the water is formed, and a discharge pipe 8 is connected to the discharge port 7.

  The heating mechanism 3 supplies heated steam from the supply port 5 to a space formed in a sealed state between the main body 4 and the circulation conveyance mechanism 2 and circulates using heat conduction from the space to the circulation conveyance mechanism 2. An object to be dried inside the transport mechanism 2 is heated.

  Next, the configuration of the circulation and conveyance mechanism 2 will be described. The circulation and conveyance mechanism 2 can rotate a hollow cylindrical rotating shaft 10 that is vertically extended into a hollow cylindrical casing 9 that is vertically elongated. The inner peripheral edge of the spiral wing body 11 is attached to the outer peripheral surface of the rotating shaft 10. Here, the rotary shaft 10 is connected to the drive motor 12 at the upper end portion (tip portion) of the casing 9 and is pivotally supported by the bearing 13 at the lower end portion (base end portion) of the casing 9.

  The casing 9 forms a spiral conveyance path 14 along the wing body 11 inside a hollow shape, and forms an inlet 15 for feeding an object to be dried into the conveyance path 14 at the outer periphery of the lower end. While the inclined inlet pipe 16 is connected to the outlet 15, a recovery port 17 for recovering the material to be dried from the transport path 14 is formed in the upper-end-side middle outer peripheral portion, and the inclined recovery pipe 18 is connected to the recovery port 17. Are connected via an open / close shutter 19. Note that the input port 15 and the recovery port 17 may be positioned at either the upper part or the lower part of the casing 9.

  Here, the recovery port 17 is formed so as to communicate with the outer peripheral edge of the wing body 11 without a step, and the recovery port 17 and the recovery pipe 18 are provided with an inclination angle (the wing body 11) of the wing body 11 described later. And the inner wall surface of the casing 9 facing the outer peripheral edge of the casing 9 is inclined downward at an inclination angle equal to or greater than the angle inclined to the lower side than orthogonal. As a result, the material to be dried can be smoothly discharged from the wing body 11 to the recovery pipe 18 at the recovery port 17, and the recovery port 17 can be prevented from being clogged with the material to be dried.

  The rotary shaft 10 forms a circulation path 20 for circulating the material to be dried from the lower end (base end) of the hollow interior to the upper end (tip), and the circulation path from the transport path 14 to the upper end. 20 forms a circulation path inlet 21 for introducing the material to be dried into the circulation path 20, while communicating with the conveyance path 14 from the circulation path 20 to the conveyance path 14 at the lower end portion. A circulation path outlet 22 for leading out is formed, and an inclined plate 23 that is inclined toward the circulation path outlet 22 is attached to the lower end portion.

  Here, the circulation path inlet 21 is formed so as to communicate with the inner peripheral edge of the wing body 11 without a step, and the inclination angle of the wing body 11 described later (rotation with the inner peripheral edge of the wing body 11 attached) The angle is inclined downward with respect to the outer peripheral surface of the shaft 10 at an angle equal to or greater than the angle inclined downward from the orthogonal direction. As a result, the material to be dried can be smoothly introduced from the wing body 11 to the circulation path 20 at the circulation path inlet 21, and the circulation path inlet 21 can be prevented from being clogged with the material to be dried.

  The wing body 11 is spirally attached to the outer peripheral surface of the rotating shaft 10 from the lower end (base end) to the upper end (tip end) so that the outer peripheral portion faces the inner wall surface of the casing 9. ing. The wing body 11 has a flat plate-like cross section from the inner peripheral edge to the outer peripheral edge.

  The wing body 11 is formed in a horizontal state perpendicular to the inner wall surface of the casing 9 facing the outer peripheral surface of the rotating shaft 10 to which the inner peripheral edge portion is attached and the outer peripheral edge portion at the lowermost end portion. The outer peripheral edge portion is formed in a horizontal shape (inclination angle 0 degree) perpendicular to the inner wall surface of the casing 9 from the portion, and the casing 9 and the lowermost end portion (base end portion) of the wing body 11 are brought into close contact with each other without a gap. Yes. As a result, it is possible to satisfactorily scoop up the to-be-dried object introduced at the inlet 15 at the lower end of the casing 9 at the horizontal lower end of the wing body 11, and the to-be-dried object is clogged at the lower end of the wing body 11. Can be prevented.

  In addition, the wing body 11 gradually changes the inclination angle at the lower end portion, and extends from the lower end side midway portion to the upper end side midway recovery port 17 with respect to the outer peripheral surface of the rotary shaft 10 to which the inner peripheral edge portion is attached. And formed in a state inclined downward to the base end side from the orthogonal direction and inclined upward to the distal end side than orthogonal to the inner wall surface of the casing 9 facing the outer peripheral edge portion. Thus, the outer peripheral edge portion is formed so as to be inclined downward (inclination angle minus) from the inner peripheral edge portion toward the base end side rather than the horizontal shape orthogonal to the inner wall surface of the casing 9. As a result, not only the centrifugal force due to the rotation of the wing body 11 but also the component force in the direction along the wing body 11 inclined downward from the inner peripheral edge to the outer peripheral edge of the gravity acting on the object to be dried. As a result, the dry matter is pressed toward the inner wall surface of the casing 9, and as a result, the frictional force generated when the object to be dried receives a reaction force from the inner wall surface of the casing 9 increases, and the rising force generated on the object to be dried increases. The material to be dried is less likely to fall down along the wing body 11 and can be transported in a short time. In addition, heat conduction by direct contact from the heat source to the material to be dried is good, and drying is performed. Can be performed in a short time.

  Further, the wing body 11 gradually changes the inclination angle from minus to plus from the recovery port 17 at the upper end side middle part to the circulation path inlet 21 at the upper end part. And is formed so as to be inclined upwardly toward the tip end side rather than perpendicular to the outer peripheral surface of the rotating shaft 10 to which the portion is attached, and based on the inner wall surface of the casing 9 facing the outer peripheral edge portion. It is formed so as to be inclined downward toward the end portion, and the outer peripheral edge portion is inclined upward from the inner peripheral edge portion toward the tip end side rather than the horizontal shape orthogonal to the inner wall surface of the casing 9 (inclination angle). Plus). As a result, the material to be dried can be smoothly introduced from the wing body 11 to the circulation path 20 at the circulation path inlet 21, and the circulation path inlet 21 can be prevented from being clogged with the material to be dried.

  The drying apparatus 1 is configured as described above, and drives the drive motor 12 with the open / close shutter 19 closed to rotate the rotating shaft 10 and the wing body 11, and the object to be dried is supplied from the inlet 15. , And transport the dried material along the transport path 14 from the lowermost end to the circulation path inlet 21 at the upper end and then repeatedly circulate through the circulation path 20 to the circulation path outlet 22 for a predetermined time. In the meantime, the object to be dried is heated by the heating mechanism 3 to be dried, and the opening / closing shutter 19 is opened after a predetermined time has elapsed, and the dried object to be dried is recovered from the recovery port 17.

  As described above, in the drying apparatus 1, the spiral wing body 11 is rotatably disposed inside the cylindrical casing 9, and the object to be dried is casing by the rotating spiral wing body 11. It is comprised so that it may dry, conveying from 9 base end parts toward a front-end | tip part.

  In addition, in the drying device 1, the outer peripheral edge portion of the wing body 11 is formed to be inclined toward the base end side (downward) rather than perpendicular to the inner wall surface of the casing 9.

  For this reason, in the drying apparatus 1 having the above-described configuration, the object to be dried is contained in the casing 9 not only by the centrifugal force caused by the rotation of the blade body 11 but also by the component force in the direction along the blade body 11 of the gravity acting on the object to be dried. Since it can be pressed toward the wall surface, the ascending force generated on the object to be dried is increased, and the object to be dried is less likely to fall down along the wing body 11, and transport and drying can be performed in a short time. As described above, in the drying apparatus 1 having the above-described configuration, the conveyance capability increases, so that the time required for conveyance and drying can be made the same as before even if the number of rotations of the rotary shaft 10 is reduced as compared with the conventional one. In addition, the drying device 1 can be driven with less energy consumption than before, and the running cost of the drying device 1 can be reduced.

  Further, in the drying apparatus 1, the inlet 15 for feeding the material to be dried is formed at the base end portion of the casing 9, and the base end portion of the wing body 11 is formed so as to be orthogonal to the inner wall surface of the casing 9. doing.

  Therefore, in the drying device 1, the material to be dried put in the base end portion of the casing 9 can be scooped up at the base end portion of the wing body 11, and the material to be dried is present at the base end portion of the wing body 11. It is possible to prevent clogging.

  Further, in the drying apparatus 1, the casing 9 is provided with the cylindrical rotary shaft 10, the wing body 11 is formed on the outer peripheral surface of the rotary shaft 10, and the circulation for circulating the material to be dried inside the rotary shaft 10. Forming the path 20, forming the circulation path inlet 21 communicating with the circulation path 20 at the distal end of the rotation shaft 10, while forming the circulation path outlet 22 communicating with the circulation path 20 at the base end of the rotation shaft 10, The inner peripheral edge portion of the tip portion of the wing body 11 is formed so as to be inclined toward the tip portion side (upward) rather than perpendicular to the outer peripheral surface of the rotating shaft 10.

  Therefore, in the drying apparatus 1 having the above-described configuration, the material to be dried can be smoothly introduced from the blade body 11 to the circulation path 20 at the circulation path inlet 21, and the matter to be dried is clogged in the circulation path inlet 21. Can be prevented.

  In the drying apparatus 1, the circulation conveyance mechanism 2 can be used as an independent circulation conveyance apparatus, or can be used simply as a conveyance apparatus (screw conveyor) without a circulation function.

(Example 2)
For example, the screw conveyor 24 shown in FIGS. 4 and 5 has a solid cylindrical rotary shaft 26 that is vertically extended in a hollow cylindrical casing 25 that is vertically extended, and is rotatably attached. The inner peripheral edge of the spiral wing body 27 is attached to the outer peripheral surface of 26. Here, the rotary shaft 26 is connected to the drive motor 28 at the upper end portion (tip portion) of the casing 25 and is pivotally supported by the bearing 29 at the lower end portion (base end portion) of the casing 25.

  The casing 25 forms an inlet 30 for feeding an object to be conveyed at the outer periphery of the lower end, and connects an inclined inlet tube 31 to the inlet 30 while collecting the object to be conveyed at the upper edge of the upper edge. The recovery port 32 is formed, and an inclined recovery pipe 33 is connected to the recovery port 32.

  Here, the recovery port 32 is formed so as to communicate with the outer peripheral edge of the wing body 27 without any step, and the recovery port 32 and the recovery pipe 33 are provided with an inclination angle (the wing body 27) of the wing body 27 described later. And the inner wall surface of the casing 25 facing the outer peripheral edge of the casing 25 is inclined downward at an inclination angle equal to or greater than the angle inclined to the lower side than orthogonal. As a result, the object to be conveyed can be smoothly discharged from the wing body 27 to the collection pipe 33 at the collection port 32, and the collection object can be prevented from being clogged with the collection port 32.

  The wing body 27 is spirally attached to the outer peripheral surface of the rotating shaft 26 from the lower end portion (base end portion) to the upper end portion (tip end portion) so that the outer peripheral edge portion faces the inner wall surface of the casing 25. ing. The wing body 27 has a flat plate-like cross section from the inner peripheral edge to the outer peripheral edge.

  The wing body 27 is formed in a horizontal state perpendicular to the inner wall surface of the casing 25 facing the outer peripheral surface of the rotating shaft 26 to which the inner peripheral edge portion is attached and the outer peripheral edge portion at the lowermost end portion. The outer peripheral edge is formed in a horizontal shape (inclination angle 0 degree) perpendicular to the inner wall surface of the casing 25, and the casing 25 and the lowermost end portion (base end portion) of the wing body 27 are brought into close contact with each other without a gap. Yes. As a result, it is possible to satisfactorily scoop up the object to be transported introduced at the insertion port 30 at the lower end of the casing 25 at the horizontal lower end of the wing body 27, and the object to be transported is clogged at the lower end of the wing body 27. Can be prevented.

  In addition, the wing body 27 gradually changes the inclination angle at the lower end portion, and is orthogonal to the outer peripheral surface of the rotating shaft 26 to which the inner peripheral edge portion is attached from the lower end side midway portion to the upper end recovery port 32. And formed in a state inclined downward to the base end side, and in a state inclined upward to the distal end side rather than orthogonal to the inner wall surface of the casing 25 facing the outer peripheral edge, The outer peripheral edge from the inner peripheral edge is inclined downward (inclination angle minus) toward the base end side rather than the horizontal shape orthogonal to the inner wall surface of the casing 25. As a result, not only the centrifugal force due to the rotation of the wing body 27 but also the component force in the direction along the wing body 27 inclined downward from the inner peripheral edge portion toward the outer peripheral edge portion of the gravity acting on the conveyed object. As a result, the object to be conveyed is pressed against the inner wall surface of the casing 25. As a result, the frictional force generated when the object to be conveyed receives the reaction force from the inner wall surface of the casing 25 increases, and the rising force generated on the object to be dried increases. This increases so that the object to be dried is less likely to fall down along the wing body 27, and the conveyance can be performed in a short time.

(Example 3)
The screw conveyor 34 shown in FIGS. 6 and 7 forms a hollow casing 38 that can be bent by a base end portion 35, a flexible portion 36 having flexibility, and a tip end portion 37. A hollow spiral wing body 39 is accommodated in the housing. Here, the wing body 39 is connected to the drive motor 40 via the drive shaft 41 at the distal end portion 37 of the casing 38, and is supported by the bearing 43 via the rotary shaft 42 at the proximal end portion 35 of the casing 38. .

  The casing 38 forms an inlet 44 for feeding an object to be transported to the base end portion 35, and connects an inlet pipe 45 to the inlet 44 while collecting the object to be conveyed at the distal end portion 37. A port 46 is formed, and a recovery pipe 47 is connected to the recovery port 46.

  The wing body 39 has a distal end portion formed in a hollow spiral shape from a base end portion, and an outer peripheral edge portion faces an inner wall surface of the casing 38. The wing body 39 has a flat plate-like cross section from the inner peripheral edge to the outer peripheral edge.

  The wing body 39 is formed so as to be inclined upward rather than orthogonally with respect to the inner wall surface of the casing 38 facing the outer peripheral edge portion, and the outer peripheral edge portion from the inner peripheral edge portion to the inner wall surface of the casing 38 is formed. Thus, it is inclined downward (inclination angle minus) toward the base end side rather than orthogonally. As a result, not only the centrifugal force due to the rotation of the wing body 39 but also the component force in the direction along the wing body 39 inclined downward from the inner peripheral edge portion toward the outer peripheral edge portion of the gravity acting on the conveyed object. As a result, the object to be conveyed is pressed against the inner wall surface of the casing 38. As a result, the friction force generated when the object to be conveyed receives a reaction force from the inner wall surface of the casing 38 increases, and the rising force generated on the object to be dried increases. It increases, and it becomes difficult for a to-be-dried object to fall below along the wing | blade body 39, and conveyance can be performed in a short time.

  As described above, in the screw conveyors 24 and 34, the spiral wing bodies 27 and 39 are rotatably disposed inside the cylindrical casings 25 and 38, and the spiral wing bodies 27 that rotate. 39 to convey the object to be conveyed from the base end portion of the casing 25, 38 toward the tip end portion, and the outer peripheral edge portion of the wing bodies 27, 39 to the inner wall surface of the casing 25, 38. It is formed so as to be inclined toward the base end side (downward) from the orthogonal direction.

  Therefore, in the screw conveyors 24 and 34 having the above configuration, not only the centrifugal force due to the rotation of the wing bodies 27 and 39 but also the component force in the direction along the wing bodies 27 and 39 in the gravity acting on the object to be conveyed. Since the object can be pressed toward the inner wall surface of the casing 25, 38, the rising force generated in the object to be transported increases, and the object to be transported is less likely to slide downward along the wing bodies 27, 39, thereby shortening the transport. Can be done in time.

Example 4
In the drying apparatus 1, the circulation path 20 is formed inside the rotation shaft 10 of the circulation conveyance mechanism 2. However, as in the drying apparatus 48 shown in FIGS. 8 and 9, the rotation shaft 10 and the blade body 11. A circulation path 20 may be formed between the two.

  In this drying device 48, the outer peripheral surface of the rotating shaft 10 and the inner peripheral edge of the wing body 11 are connected by a support 49 at a predetermined interval, and the outer peripheral surface of the rotating shaft 10 and the inner peripheral edge of the wing body 11 are connected. A gap that communicates from the upper end portion (tip portion) to the lower end portion (base end portion) is formed, and this gap is used as a circulation path 20.

  Then, the drying device 48 drives the drive motor 12 with the open / close shutter 19 closed to rotate the rotary shaft 10 and the wing body 11, and feeds the material to be dried from the insertion port 15, and the circulation conveyance mechanism 2 The material to be dried is transported upward along the transport path 14 from the lowermost end portion, and the material to be dried is circulated by repeatedly dropping from the wing body 11 to the lowermost end portion via the circulation path 20, and a heating mechanism in between. The object to be dried is heated and dried in step 3, and the opening / closing shutter 19 is opened after a lapse of a predetermined time so that the dried object to be dried is recovered from the recovery port 17.

  Also in this drying device 48, since the outer peripheral edge of the wing body 11 is inclined toward the base end side (downward) rather than perpendicular to the inner wall surface of the casing 9, The object to be dried can be pressed against the inner wall surface of the casing 9 not only by the centrifugal force due to rotation but also by the component force in the direction along the wing body 11 of the gravity acting on the object to be dried. Ascending force generated increases, and it becomes difficult for the material to be dried to fall down along the wing body 11, and transport and drying can be performed in a short time. As described above, in the drying apparatus 1 having the above-described configuration, the conveyance capability increases, so that the time required for conveyance and drying can be made the same as before even if the number of rotations of the rotary shaft 10 is reduced as compared with the conventional one. In addition, the drying device 1 can be driven with less energy consumption than before, and the running cost of the drying device 1 can be reduced.

DESCRIPTION OF SYMBOLS 1 Drying apparatus 2 Circulation conveyance mechanism 3 Heating mechanism 4 Main body 5 Supply port 6 Supply tube 7 Discharge port 8 Discharge tube 9 Casing 10 Rotating shaft
11 Wings 12 Drive motor
13 Bearing 14 Transport path
15 Input port 16 Input tube
17 Collection port 18 Collection pipe
19 Open / close shutter 20 Circuit
21 Circuit entrance 22 Circuit exit
23 Inclined plate 24 Screw conveyor
25 Casing 26 Rotating shaft
27 Wings 28 Drive motor
29 Bearing 30 slot
31 Input pipe 32 Collection port
33 Recovery pipe 34 Screw conveyor
35 Base end 36 Flexible part
37 Tip 38 Casing
39 Wing body 40 Drive motor
41 Drive shaft 42 Rotary shaft
43 Bearing 44 Slot
45 Input pipe 46 Collection port
47 Recovery tube 48 Drying equipment
49 Support
101 Screw conveyor 102 Casing
103 Rotating shaft 104 Wing body
105 Drive motor 106 Bearing
107 Input port 108 Output port

Claims (3)

A spiral wing body is rotatably arranged inside a cylindrical casing, and drying is performed while the object to be dried is conveyed from the base end portion to the tip end portion of the casing by the rotating spiral wing body. In the drying device,
The outer peripheral edge of the wing body is inclined toward the base end side rather than perpendicular to the inner wall surface of the casing, and the casing is provided with a cylindrical rotating shaft, and the wing body is provided on the outer peripheral surface of the rotating shaft. Forming a circulation path for circulating the material to be dried inside the rotation shaft, and forming a circulation path inlet communicating with the circulation path at the tip of the rotation shaft, while forming a circulation path at the base end of the rotation shaft The drying apparatus is characterized in that a circulation path outlet communicating with the outer periphery of the rotary shaft is formed, and the inner peripheral edge of the blade body at the tip is inclined toward the tip side rather than perpendicular to the outer peripheral surface of the rotating shaft .   2. The inlet of the base end portion of the casing for introducing an object to be dried is formed, and the wing body of the base end portion is formed so as to be orthogonal to the inner wall surface of the casing. Drying equipment. In a screw conveyor that spirally arranges a spiral wing body inside a cylindrical casing and conveys an object to be conveyed from the base end portion of the casing to the tip end portion with the rotating spiral wing body,
The outer peripheral edge of the wing body is inclined toward the base end side rather than perpendicular to the inner wall surface of the casing, and the casing is provided with a cylindrical rotating shaft, and the wing body is provided on the outer peripheral surface of the rotating shaft. Forming a circulation path for circulating the object to be conveyed inside the rotation shaft, forming a circulation path inlet communicating with the circulation path at the tip of the rotation shaft, and forming a circulation path at the base end of the rotation shaft A screw conveyor, characterized in that a circulation path outlet communicating with the outer periphery of the rotary shaft is formed, and the inner peripheral edge of the blade body at the tip is inclined toward the tip side rather than perpendicular to the outer peripheral surface of the rotating shaft .

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