JP6591925B2 - Rotary kiln - Google Patents

Description

  The present invention relates to an externally heated rotary kiln used for manufacturing battery materials, for example.

  As shown in Patent Document 1, an externally heated rotary kiln includes a furnace core tube and a heating unit. The heating unit includes a heating chamber and a heater. The intermediate portion in the axial direction of the core tube is accommodated in the heating chamber. The heater is disposed in the heating chamber. In the heating chamber, the heater heats the core tube from the outside in the radial direction. An object to be processed is accommodated in the core tube. The workpiece is indirectly heated by a heater through the side peripheral wall of the core tube.

JP 2011-058885 A

  The heating chamber is isolated from the outside by an outer shell and a heat insulating material. For this reason, the operator cannot directly confirm the state of the core tube in the heating chamber. Then, an object of this invention is to provide the rotary kiln which can detect the deformation | transformation of the core tube in a heating chamber.

  In order to solve the above-mentioned problems, a rotary kiln according to the present invention is disposed inside a heating core tube that rotates about its own axis, a heating unit having a heating chamber through which the core tube is inserted, and the core. A support member that is disposed below the tube by a predetermined interval and that can support the core tube deformed downward beyond the predetermined interval, and the deformed core tube is in contact with the support member And a sensor for detecting. Here, “deformation” includes elastic deformation and plastic deformation. In addition, “deformation” includes, for example, bending or breaking of the core tube in whole or in part.

  According to the rotary kiln of the present invention, the support member is arranged at a predetermined interval below the core tube. When the core tube is deformed downward beyond a predetermined interval, the core tube comes into contact with the support member. The sensor detects contact of the core tube with the support member. Thus, according to the rotary kiln of the present invention, the deformation of the core tube in the heating chamber can be detected via the sensor.

It is a front-back direction sectional view of the rotary kiln of a first embodiment. It is an enlarged view in the frame II of FIG. It is the III-III direction sectional drawing of FIG. It is a schematic diagram of the detection circuit of the rotary kiln. It is an axial sectional view of the vicinity of the heating part of the rotary kiln when the core tube is deformed. FIG. 6 is a cross-sectional view in the VI-VI direction of FIG. 5. It is radial direction sectional drawing of the heating part vicinity of the rotary kiln of 2nd embodiment. It is a schematic diagram of the detection circuit of the rotary kiln. It is radial direction sectional drawing of the heating part vicinity of the rotary kiln at the time of a furnace core tube deformation | transformation. It is radial direction sectional drawing of the heating part vicinity of the rotary kiln of 3rd embodiment. It is radial direction sectional drawing of the heating part vicinity of the rotary kiln at the time of a furnace core tube deformation | transformation. It is radial direction sectional drawing of the heating part vicinity of the rotary kiln of other embodiment (the 1). It is radial direction sectional drawing of the heating part vicinity of the rotary kiln of other embodiment (the 2).

  Hereinafter, embodiments of the rotary kiln of the present invention will be described.

<First embodiment>
[Composition of rotary kiln]
First, the structure of the rotary kiln of this embodiment is demonstrated. In the following drawings, the front side corresponds to the supply side (upstream side), and the rear side corresponds to the discharge side (downstream side). In FIG. 1, the front-back direction (axial direction) sectional drawing of the rotary kiln of this embodiment is shown. As shown in FIG. 1, the rotary kiln 1 of the present embodiment includes a supply unit 2, a discharge unit 3, a rotation unit 4, a heating unit 5, a detection unit (not shown), and a control device (not shown). And a display device (not shown) and a gantry 9.

{Stand 9, rotating part 4}
The gantry 9 includes a base 90, a supply table 91, and a discharge table 92. The rotating unit 4 includes a supply-side rotation shaft 40, a supply-side gear 41, a supply-side holder 42, a core tube 43, a discharge-side rotation shaft 44, a discharge-side gear 45, and a discharge-side holder 46. ing. The core tube 43 is made of carbon (conductor) and has a cylindrical shape extending in the front-rear direction. The core tube 43 is disposed substantially horizontally (specifically, so as to gently descend from the front side toward the rear side). The core tube 43 is rotatable around its own axis. The battery material (object to be processed) moves inside the core tube 43 from the front side toward the rear side. A plurality of discharge ports 430 are formed in the side peripheral wall at the rear end of the core tube 43.

  The supply side holder 42 covers the front end opening of the furnace core tube 43 from the front side. The supply side holder 42 is fixed to the core tube 43 by bolts (not shown). The supply-side rotating shaft 40 has a cylindrical shape extending in the front-rear direction. The supply side rotating shaft 40 is fixed to the supply side holder 42. The supply side rotating shaft 40 passes through the supply side holder 42. The supply side gear 41 is mounted on the supply side rotation shaft 40.

  The discharge side holder 46 covers the rear end opening of the core tube 43 from the rear side. The arrangement of the discharge side member (discharge side holder 46, discharge side rotating shaft 44, discharge side gear 45) and the arrangement of the supply side member (supply side holder 42, supply side rotating shaft 40, supply side gear 41) are front and rear. Symmetric.

{Supply unit 2, discharge unit 3}
The supply unit 2 is disposed on the supply table 91. The supply unit 2 includes a pair of front and rear bearings 20, a supply side cover 21, a supply hopper 22, and a screw feeder 23. The supply side cover 21 covers the supply side holder 42 from the front side. The supply side rotating shaft 40 penetrates the supply side cover 21. The supply hopper 22 is disposed on the front side of the supply side rotating shaft 40. The screw feeder 23 extends from the bottom of the supply hopper 22 to the rear side. The screw feeder 23 is inserted into the supply side rotating shaft 40. The pair of front and rear bearing portions 20 support the supply-side rotating shaft 40 in a rotatable manner.

  The discharge unit 3 is disposed on the discharge table 92. The discharge part 3 includes a pair of front and rear bearing parts 30 and a discharge side cover 31. The discharge side cover 31 covers the discharge side holder 46 from the rear side. The discharge side rotation shaft 44 penetrates the discharge side cover 31. A discharge port 310 is opened at the lower end of the discharge side cover 31. The pair of front and rear bearing portions 30 support the discharge side rotation shaft 44 so as to be rotatable.

{Heating unit 5, detection unit 6, control device 70, display device 71}
FIG. 2 shows an enlarged view in the frame II of FIG. FIG. 3 shows a cross-sectional view in the III-III direction of FIG. As shown in FIGS. 1 to 3, the heating unit 5 is disposed on the base 90. The heating unit 5 is disposed between the supply unit 2 and the discharge unit 3. The heating unit 5 includes an outer shell 50, a heat insulating material 51, a heating chamber 52, and a plurality of heaters 53.

  The outer shell 50 has a box shape. The heat insulating material 51 is made of refractory brick (insulator) and is lined on the inner surface of the outer shell 50. The heating chamber 52 is partitioned inside the heat insulating material 51. The core tube 43 passes through the heating chamber 52 in the front-rear direction. The heater 53 includes a protective tube and an electrothermal heater main body. The heater 53 penetrates the heating chamber 52 in the left-right direction. The plurality of heaters 53 are arranged in the heating chamber 52 in two upper and lower stages. The plurality of upper heaters 53 are arranged above the core tube 43. The plurality of upper heaters 53 are arranged in the front-rear direction at a predetermined interval. The plurality of lower heaters 53 are arranged below the core tube 43. The plurality of lower heaters 53 are arranged in the front-rear direction with a predetermined interval.

  The detection unit 6 includes a plurality of support members 60, a plurality of electrodes 61, an electrode 62, an ohmmeter 63, and a power source 64. The ohmmeter 63 is included in the concept of the “sensor” of the present invention. The support member 60 is made of carbon (conductor) and has a block shape. The support member 60 protrudes upward from the heat insulating material 51 that partitions the bottom surface of the heating chamber 52. The support member 60 is disposed directly below the core tube 43. The support member 60 includes a support surface 600. The support surface 600 has a planar shape extending in the horizontal direction. The support surface 600 is disposed at a higher position than the lower heater 53. The support surface 600 is disposed at a lower position than the core tube 43. As shown in FIG. 3, the core tube 43 and the support surface 600 are separated by a predetermined distance A. As shown in FIG. 2, the plurality of support members 60 are arranged in the front-rear direction at a predetermined interval.

  Here, the distance A (that is, the altitude (the vertical position) of the support surface 600) is, for example, the mass of the core tube 43, the mass of the battery material inside the core tube 43, the amount of thermal deformation of the core tube 43, It is determined in consideration of the degree of softening due to heat, the inclination angle of the core tube 43, the rotational speed of the core tube 43, and the like. The interval A is determined by trial operation, experiment, simulation, or the like. When the altitude of the support surface 600 is a, the altitude of the support surface 600 that interferes with the core tube 43 during normal operation is b, and the uppermost altitude of the lower heater 53 is c, the altitude c <the altitude a <the altitude b. A relationship is established.

  The electrode 61 extends in the vertical direction. The upper end of the electrode 61 is in contact with the support member 60. As shown in FIG. 3, the lower end of the electrode 61 is exposed to the outside of the outer shell 50 while being insulated from the outer shell 50. As shown in FIG. 2, the same number of electrodes 61 as the support members 60 are arranged. The plurality of electrodes 61 are arranged in the front-rear direction at a predetermined interval.

As shown in FIG. 2, the electrode 62 is in contact with the outer peripheral surface of the side peripheral wall at the rear end of the core tube 43 from below. The electrode 62 has a pantograph shape. For this reason, the electrode 62 can be deformed while following the deformation of the core tube 43 and maintaining the contact state with the core tube 43.
In FIG. 4, the schematic diagram of the detection circuit of the rotary kiln of this embodiment is shown. As shown in FIGS. 2 and 4, a detection circuit C is set between the detection unit 6 and the core tube 43. The detection circuit C passes through a power source 64, a plurality of electrodes 61, a plurality of contacts S, an electrode 62, and an ohmmeter 63. The contact S includes a support member 60 and a core tube 43 (specifically, a portion of the core tube 43 that is disposed immediately above an arbitrary support member 60). The power supply 64 is a constant pressure power supply. The resistance meter 63 can detect the electrical resistance value R of the detection circuit C. The electric resistance value R is included in the concept of “electric quantity” of the present invention. The resistance meter 63, the control device 70, and the display device 71 are electrically connected. The storage unit (not shown) of the control device 70 stores a resistance threshold value Rth related to the electrical resistance value R. The electrical resistance value R is transmitted from the resistance meter 63 to the control device 70. Control device 70 compares electric resistance value R with resistance threshold value Rth.

[Behavior when manufacturing battery materials]
Next, the movement at the time of battery material manufacture of the rotary kiln of this embodiment is demonstrated. First, the supply side gear 41 and the discharge side gear 45 shown in FIG. 1 are rotated by a motor (not shown). The rotational force is transmitted from the supply side gear 41 to the front end of the core tube 43 via the supply side rotation shaft 40 and the supply side holder 42. In addition, the rotational force is transmitted from the discharge side gear 45 to the rear end of the core tube 43 through the discharge side rotation shaft 44 and the discharge side holder 46. For this reason, the core tube 43 rotates around its own axis.

  Subsequently, the battery material is supplied from the supply hopper 22 to the inside of the core tube 43 by driving the screw feeder 23. In the rotating core tube 43, the battery material moves from the front side toward the rear side. As shown in FIG. 2, the axial intermediate portion of the core tube 43 is accommodated in the heating chamber 52. An intermediate portion in the axial direction of the core tube 43 is heated by a plurality of heaters 53 in the heating chamber 52 in a predetermined temperature pattern. By passing the intermediate portion of the core tube 43 in the axial direction (that is, the heating chamber 52), the battery material can be subjected to a predetermined heat treatment.

  Thereafter, the battery material after the heat treatment is discharged from the discharge port 430 of the rotating core tube 43. The discharged battery material is taken out from the discharge port 310 of the discharge side cover 31. In this way, the battery material is manufactured. At the time of manufacturing the battery material, the interior of the heating chamber 52 and the interior of the furnace core tube 43 are set in advance in a nitrogen gas (non-oxidizing gas) atmosphere.

[Motion during core tube deformation]
Next, the movement of the rotary kiln of the present embodiment when the core tube is deformed will be described. FIG. 5 shows an axial cross-sectional view of the vicinity of the heating section of the rotary kiln of the present embodiment when the core tube is deformed (when the core tube is broken). FIG. 6 is a cross-sectional view in the VI-VI direction of FIG. 5 corresponds to FIG. 2, and FIG. 6 corresponds to FIG.

  As shown in FIG. 3, during normal operation, a predetermined interval A is secured between the core tube 43 and the support surface 600. For this reason, the core tube 43 does not interfere with the support surface 600. Therefore, all the contacts S shown in FIG. 4 are opened. That is, the electrical resistance value R detected by the ohmmeter 63 remains infinite and does not change. Therefore, during normal operation, the electrical resistance value R continues to exceed the resistance threshold value Rth (R> Rth).

  Here, as shown in FIG. 5, it is assumed that the core tube 43 is broken in the section between the third support member 60 from the front and the fourth support member 60 from the front. When the core tube 43 is broken, the front portion 43a of the core tube 43 is supported in a cantilever shape from the front side only by the pair of bearing portions 20 shown in FIG. For this reason, the rear end of the front portion 43a falls due to gravity. As shown in FIGS. 5 and 6, the rear end of the front portion 43 a abuts on the support surface 600 of the third support member 60 from the front. Therefore, as shown by a dotted line in FIG. 4, the third contact S from the front is closed.

  Similarly, when the core tube 43 is bent, the rear portion 43b of the core tube 43 is supported in a cantilever shape from the rear side only by the pair of bearing portions 30 shown in FIG. For this reason, the front end of the rear portion 43b falls due to gravity. As shown in FIG. 5, the front end of the rear portion 43 b contacts the support surface 600 of the fourth support member 60 from the front. Therefore, as shown by a dotted line in FIG. 4, the fourth contact S from the front is closed.

  Thus, when the two contacts S of the detection circuit C are closed, a current flows through the detection circuit C. For this reason, the electrical resistance value R detected by the ohmmeter 63 becomes small. Therefore, when the core tube 43 is broken, the electric resistance value R is equal to or less than the resistance threshold value Rth (R ≦ Rth). The control device 70 can determine from the change in the electrical resistance value R that the core tube 43 has been deformed. In response to an instruction from the control device 70, the display device 71 displays a warning message (for example, a message such as “the core tube has been deformed”) on a screen (not shown). The message is included in the “information” concept of the present invention. The operator can confirm that the core tube 43 is deformed inside the heating chamber 52 that cannot be visually observed by viewing the message.

[Function and effect]
Next, the effect of the rotary kiln of this embodiment is demonstrated. Gravity acts on the core tube 43 and the battery material inside the core tube 43. Further, the centrifugal force resulting from the rotation of the core tube 43 acts on the core tube 43 and the battery material inside the core tube 43. For this reason, the core tube 43 is easily deformed downward (outside in the radial direction). In this regard, according to the rotary kiln 1 of the present embodiment, as shown in FIG. 3, the support member 60 is disposed at a predetermined interval A below the core tube 43. As shown in FIG. 6, when the core tube 43 is deformed downward beyond the interval A, the core tube 43 contacts the support member 60. The resistance meter 63 shown in FIG. 4 detects the contact of the core tube 43 with the support member 60 via the electric resistance value R. Thus, according to the rotary kiln 1 of the present embodiment, the deformation of the core tube 43 in the heating chamber 52 can be detected via the resistance meter 63.

  Further, as shown in FIG. 3, the altitude a of the support surface 600 is set to a position higher than the uppermost altitude c of the lower heater 53. Therefore, as shown in FIG. 5, even if the core tube 43 is deformed, the lower heater 53 can be protected from the core tube 43.

  In addition, as shown in FIGS. 2 and 5, the ohmmeter 63 is disposed outside the heating chamber 52. For this reason, the resistance meter 63 can be protected from the heat of the heating chamber 52. Further, an inexpensive resistance meter 63 having low heat resistance can be employed.

  The core tube 43 is made of carbon (conductor). For this reason, as shown in FIG. 4, the core tube 43 that is a deformation detection target can be incorporated in the detection circuit C. Therefore, compared with the case where the detection circuit C is provided independently of the furnace core tube 43, the circuit configuration of the detection circuit C is simplified. In addition, the number of parts is reduced.

  Also. As shown in FIG. 4, the display device 71 can display a warning message regarding the deformation of the core tube 43. The operator can confirm that the core tube 43 is deformed inside the heating chamber 52 that cannot be visually observed by viewing the message. Therefore, the rotary kiln 1 can be quickly stopped. Therefore, it can suppress that battery material leaks out into the heating chamber 52, and a foreign material mixes in battery material.

  As shown in FIGS. 2 and 5, the electrode 62 has a pantograph shape. For this reason, the electrode 62 can be deformed while following the deformation of the core tube 43 and maintaining the contact state with the core tube 43.

  The core tube 43 is made of carbon. For this reason, compared with the case where the furnace core tube 43 is made of metal (iron, stainless steel, etc.), it is possible to suppress the metal powder that adversely affects the battery material from being mixed into the battery material. Further, the carbon core tube 43 is excellent in workability. Further, the carbon core tube 43 is excellent in thermal shock resistance.

  Further, nitrogen gas is supplied into the heating chamber 52. For this reason, it can suppress that the outer peripheral surface of the core tube 43 oxidizes. In addition, nitrogen gas is supplied into the core tube 43. For this reason, it can suppress that the internal peripheral surface of the core tube 43 oxidizes.

  Moreover, according to the rotary kiln 1 of this embodiment, not the core tube 43 but the supply side rotating shaft 40 and the discharge side rotating shaft 44 are rotationally driven. For this reason, it is not necessary to arrange a gear directly in the core tube 43. Therefore, the core tube 43 can be easily processed.

<Second embodiment>
The difference between the rotary kiln of this embodiment and the rotary kiln of the first embodiment is that a detection circuit is individually set for each of the plurality of support members. Here, only differences will be described.

  In FIG. 7, radial direction sectional drawing of the heating part vicinity of the rotary kiln of this embodiment is shown. FIG. 8 shows a schematic diagram of a detection circuit of the rotary kiln. FIG. 9 is a radial cross-sectional view of the vicinity of the heating part of the rotary kiln when the core tube is deformed (when the core tube is broken). In addition, about the site | part corresponding to FIG.3, FIG.4, FIG.6, it shows with the same code | symbol.

  As shown in FIG. 7, the support member 60 (arbitrary support member 60 among the plurality of support members 60 shown in FIG. 2) includes a pair of left and right supports 60a and 60b. A curved support surface 600a is recessed in the upper right corner of the left support 60a. A curved support surface 600b is recessed in the upper left corner of the right support 60b. The supports 60a and 60b are made of carbon (conductor). An insulating plate 60c made of an insulator is interposed between the pair of left and right supports 60a and 60b. The insulating plate 60c blocks the conduction between the pair of left and right supports 60a and 60b.

  The electrode 61a extends in the vertical direction. The upper end of the electrode 61a is in contact with the left support 60a. The lower end of the electrode 61 a is exposed to the outside of the outer shell 50 while being insulated from the outer shell 50. Similarly, the electrode 61b extends in the vertical direction. The upper end of the electrode 61b is in contact with the right support 60b. The lower end of the electrode 61 b is exposed to the outside of the outer shell 50 while being insulated from the outer shell 50.

  As shown in FIG. 8, the detection circuit C is individually set corresponding to each of the plurality of support members 60. Each of the plurality of detection circuits C passes through a power source 64, an ammeter 65, an electrode 61a, a contact S, and an electrode 61b. The ammeter 65 is included in the concept of the “sensor” of the present invention. The contact S includes support bodies 60a and 60b and a core tube 43 (specifically, a portion of the core tube 43 that is disposed right above the arbitrary support bodies 60a and 60b). The ammeter 65 can detect the current value I of the detection circuit C. The current value I is included in the concept of “electric quantity” of the present invention. The storage unit (not shown) of the control device 70 stores a current threshold value Ith related to the current value I. The current value I is transmitted from the ammeter 65 to the control device 70. Control device 70 compares current value I with current threshold Ith.

  As shown in FIG. 7, during normal operation, a predetermined distance A is secured between the core tube 43 and the support surfaces 600a and 600b. For this reason, the core tube 43 does not interfere with the support surfaces 600a and 600b. Therefore, all the contacts S shown in FIG. 8 are opened. That is, the current value I detected by the ammeter 65 remains zero. Therefore, during normal operation, the current value I continues to be lower than the current threshold value Ith (I <Ith).

  Here, as shown in FIG. 5, it is assumed that the core tube 43 is broken in the section between the third support member 60 from the front and the fourth support member 60 from the front. As shown in FIGS. 5 and 9, when the core tube 43 is folded, the rear end of the front portion 43 a of the core tube 43 abuts on the support surface 600 of the third support member 60 from the front. Therefore, the support surface 600 a and the support surface 600 b are electrically connected via the core tube 43. That is, as indicated by a dotted line in FIG. 8, the contact S of the third detection circuit C from the front is closed.

  Similarly, as shown in FIG. 5, when the core tube 43 is folded, the front end of the rear portion 43 b of the core tube 43 abuts on the support surface 600 of the fourth support member 60 from the front. Therefore, as shown by the dotted line in FIG. 8, the contact S of the fourth detection circuit C from the front is closed.

  Thus, when the contact S of the two detection circuits C is closed, current flows only through the two detection circuits C. For this reason, in each of the two detection circuits C, the current value I detected by the ammeter 65 increases. Therefore, when the core tube 43 is broken, the current value I is equal to or greater than the current threshold value Ith (I ≧ Ith). The control device 70 can determine from the change in the current value I that the core tube 43 has been deformed. In addition, the control device 70 can determine the deformation location of the core tube 43 from the positions of the two detection circuits C where the current value I has changed. In response to an instruction from the control device 70, the display device 71 displays a warning message (for example, a message such as “the core portion of the reactor core tube has been deformed”) on a screen (not shown). The message is included in the “information” concept of the present invention. The operator can confirm that the core tube 43 is deformed inside the heating chamber 52 that cannot be visually observed by viewing the message. In addition, the operator can confirm the deformed portion of the core tube 43.

  The rotary kiln according to the present embodiment and the rotary kiln according to the first embodiment have the same functions and effects with respect to parts having the same configuration. Further, according to the rotary kiln of the present embodiment, the detection circuit C is individually set for each of the plurality of support members 60. For this reason, the operator can confirm the deformation location of the core tube 43 in addition to the presence or absence of the deformation of the core tube 43.

<Third embodiment>
The difference between the rotary kiln of this embodiment and the rotary kiln of the first embodiment is that a mechanical detection unit is arranged instead of an electric type. Here, only differences will be described.

  In FIG. 10, radial direction sectional drawing of the heating part vicinity of the rotary kiln of this embodiment is shown. FIG. 11 is a radial cross-sectional view of the vicinity of the heating part of the rotary kiln when the core tube is deformed (when the core tube is broken). In addition, about the site | part corresponding to FIG. 3, FIG. 6, it shows with the same code | symbol.

  As shown in FIGS. 10 and 11, a bottomed cylindrical spring case 55 that opens upward is provided on the lower wall opening of the outer shell 50. The detection unit 6 includes a pair of left and right coil springs 66, a shaft 67, and a limit switch 68. The limit switch 68 is included in the concept of “sensor” of the present invention. The limit switch 68, the control device 70 and the display device 71 shown in FIG. 4 are electrically connected. The pair of left and right coil springs 66 are interposed between the inner surface of the bottom wall of the spring case 55 and the support member 60 (any support member 60 among the plurality of support members 60 shown in FIG. 2). The support member 60 is made of refractory brick (insulator). The limit switch 68 is disposed on the outer surface of the bottom wall of the spring case 55. The shaft 67 passes through the bottom wall of the spring case 55. The shaft 67 is interposed between the lever 680 of the limit switch 68 and the support member 60.

  As shown in FIG. 10, during normal operation, a predetermined distance A is secured between the core tube 43 and the support surface 600. For this reason, the core tube 43 does not interfere with the support surface 600. Therefore, the lever 680 does not swing.

  Here, as shown in FIG. 5, it is assumed that the core tube 43 is broken in the section between the third support member 60 from the front and the fourth support member 60 from the front. As shown in FIGS. 5 and 11, when the core tube 43 is broken, the rear end of the front portion 43 a of the core tube 43 comes into contact with the support surface 600 of the third support member 60 from the front. By pressing the front portion 43a from above, the support member 60 moves downward while compressing the pair of left and right coil springs 66. Further, the shaft 67 moves downward by being pressed by the support member 60 from above. Further, when the shaft 67 is pressed from above, the lever 680 swings downward. That is, the limit switch 68 is turned on. Similarly, the limit switch 68 corresponding to the fourth support member 60 from the front is also turned on. These ON signals are transmitted to the control device 70 shown in FIG. The control device 70 can determine from the ON signal that the core tube 43 has been deformed. In addition, the control device 70 can determine the deformation location of the core tube 43 from the positions of the two limit switches 68 to which the ON signal is transmitted. In response to an instruction from the control device 70, the display device 71 displays a warning message (for example, a message such as “the core portion of the reactor core tube has been deformed”) on a screen (not shown). The message is included in the “information” concept of the present invention. The operator can confirm that the core tube 43 is deformed inside the heating chamber 52 that cannot be visually observed by viewing the message. In addition, the operator can confirm the deformed portion of the core tube 43.

  The rotary kiln according to the present embodiment and the rotary kiln according to the first embodiment have the same functions and effects with respect to parts having the same configuration. Further, according to the rotary kiln of the present embodiment, the limit switch 68 is individually set for each of the plurality of support members 60. For this reason, the operator can confirm the deformation location of the core tube 43 in addition to the presence or absence of the deformation of the core tube 43.

  Moreover, according to the rotary kiln of this embodiment, the detection circuit C is unnecessary. For this reason, it is not necessary to incorporate the core tube 43 into a part of the detection circuit C. That is, the core tube 43 need not be made of a conductor (of course, it may be made of a conductor). Therefore, even if the core tube 43 is made of an insulator such as ceramic or quartz glass, the deformation of the core tube 43 in the heating chamber 52 can be detected via the limit switch 68.

  Moreover, according to the rotary kiln of this embodiment, the detection circuit C is unnecessary. For this reason, it is not necessary to incorporate the support member 60 into a part of the detection circuit C. That is, the support member 60 does not need to be made of a conductor (of course, it may be made of a conductor). Therefore, an insulator such as ceramic can be employed as the material of the support member 60.

  Further, according to the rotary kiln of the present embodiment, the pair of left and right coil springs 66 can absorb the impact applied to the support member 60 when the broken core tube 43 falls. For this reason, the core tube 43 and the support member 60 are not easily damaged by an impact at the time of dropping.

<Others>
The embodiment of the rotary kiln of the present invention has been described above. However, the embodiment is not particularly limited to the above embodiment. Various modifications and improvements that can be made by those skilled in the art are also possible.

  In FIG. 12, radial direction sectional drawing of the heating part vicinity of the rotary kiln of other embodiment (the 1) is shown. In addition, about the site | part corresponding to FIG. 3, it shows with the same code | symbol. As illustrated in FIG. 12, the support member 60 partitions the heating chamber 52 into a plurality of small rooms arranged in the front-rear direction. That is, the support member 60 has a function as a partition wall (partition wall). According to the rotary kiln of the present embodiment, the temperature can be easily set for each small room. For this reason, the freedom degree of the setting of the temperature pattern in the heating chamber 52 becomes high.

  In addition, like the support member 60 shown in FIG. 12, in order to give the support member 60 shown in FIG. 7 a function as a partition wall, the support member 60 is turned upside down in the space above the support member 60. What is necessary is just to fill with the shape supporting member (including the insulating plate 60c).

  In FIG. 13, radial direction sectional drawing of the heating part vicinity of the rotary kiln of other embodiment (the 2) is shown. In addition, about the site | part corresponding to FIG. 3, it shows with the same code | symbol. As shown in FIG. 13, the curvature of the support surface 600 coincides with the curvature of the core tube 43. According to the rotary kiln of the present embodiment, as shown by the alternate long and short dash line in FIG. 13, when the core tube 43 is deformed, the support surface 600 can completely receive the falling core tube 43. Therefore, the core tube 43 and the support member 60 are not easily damaged by the impact at the time of dropping.

  The type of the object to be processed that is the heating target of the rotary kiln 1 is not particularly limited. For example, it may be a raw material of various products, waste, food, or the like. Moreover, the property of a to-be-processed object is not specifically limited. For example, it may be in the form of powder, granule, or block. The material of the core tube 43 is not particularly limited. It may be made of a conductor (carbon, metal, etc.) or an insulator (ceramic, glass, etc.).

  Compared to a metal core tube, the carbon core tube 43 has low toughness and is easily broken. Further, in order to suppress consumption due to oxidation, the carbon core tube 43 needs to be heated inside the heating chamber 52 in a non-oxidizing gas atmosphere. Therefore, when the carbon core tube 43 is employed, it is difficult to confirm the state of the core tube 43 from the outside even though the toughness is low. In this regard, according to the rotary kiln of the present invention, even when the carbon core tube 43 is employed, the state of the core tube 43 in the heating chamber 52 is determined by a sensor (resistance meter 63, ammeter 65, limit switch 68, etc. ) Can be easily confirmed. As described above, the rotary kiln of the present invention is particularly suitable when the core tube 43 is made of carbon and the object to be processed is an object that dislikes mixing of metal powder (for example, battery material).

  An elastic member (for example, a disc spring or a coil spring 66 shown in FIG. 10) may be interposed between the support member 60 shown in FIG. 3 and the heat insulating material 51 below the support member 60. Thus, the elastic member can absorb the impact applied to the support member 60 when the deformed core tube 43 falls. For this reason, the core tube 43 and the support member 60 are not easily damaged by an impact at the time of dropping. Further, an elastic member made of a conductor may be interposed between the support member 60 and the electrode 61. In this case, the support member 60 and the electrode 61 can be electrically connected via the elastic member.

  The front-rear direction positions of the plurality of support members 60 shown in FIG. 2 are not particularly limited. For example, when the core tube 43 is formed by combining a plurality of short-axis cylindrical tubes, the support member 60 may be disposed at a joint between a pair of tubes adjacent in the front-rear direction. In other words, the support member 60 may be intensively arranged at a position where the core tube 43 is easily deformed. Further, a single support member 60 may be disposed on the rotary kiln 1. Even in this case, the operator can confirm whether the core tube 43 is deformed.

  The position of the electrode 62 shown in FIG. 1 is not particularly limited. For example, the electrode 62 may be disposed so as to be in contact with any one of the vicinity of the front end of the core tube 43, the supply side holder 42, the supply side rotation shaft 40, the discharge side holder 46, and the discharge side rotation shaft 44. The electrode 62 does not have to be a pantograph. What is necessary is just to ensure a contact state with the core tube 43. FIG.

  The timing at which the display device 71 shown in FIG. 4 displays a message (the state of the core tube 43) is not particularly limited. When the interval A shown in FIG. 3 is set small, a message can be displayed before the core tube 43 is completely broken. For example, the message can be displayed at a stage where the core tube 43 is cracked or at a stage where the core tube 43 is bent. In addition, in the stage before the core tube 43 is completely broken, the core tube 43 and the support surface 600 may repeat contact and separation periodically depending on the rotation angle of the core tube 43. In this case, the electrical resistance value R changes periodically. The control device 70 may issue a message display instruction to the display device 71 based on the periodic change of the electrical resistance value R. When the interval A shown in FIG. 3 is set large, a message can be displayed after the core tube 43 is completely broken.

  The display device 71 may display marks and figures instead of the message or together with the message. Further, the display device 71 may turn on or blink the lamp instead of or together with the message. Further, the display device 71 may sound an alarm instead of or together with the message.

  The control device 70 may not display a message on the display device 71. For example, when the core tube 43 is deformed, the control device 70 may automatically stop the operation of the rotary kiln 1. That is, the control device 70 may perform interlock control.

  The power supply 64 and the ammeter 65 of the plurality of detection circuits C shown in FIG. 8 may be shared. That is, a single power supply 64 may sequentially apply voltages to the plurality of detection circuits C in a scanning manner. Similarly, a plurality of detection circuits C may be connected to the single ammeter 65 sequentially in a scanning manner.

  The contact S shown in FIG. 4 may be closed during normal operation and may be opened during deformation. For example, a pair of electrodes are disposed at both ends in the front-rear direction of the core tube 43 (including the supply side holder 42, the supply side rotation shaft 40, the discharge side holder 46, and the discharge side rotation shaft 44). It suffices to pass a current between them. At the time of deformation, the contact S is opened (conduction does not have to be completely interrupted). For this reason, the conduction area of the core tube 43 is reduced. Therefore, the electrical resistance value R increases. The deformation of the core tube 43 may be detected by detecting the change of the electric resistance value R with the resistance meter 63.

  A stopper that restricts the maximum compression amount of the coil spring 66 may be disposed around the coil spring 66 shown in FIG. This can prevent the altitude a of the support surface 600 from falling below the altitude c of the lower heater 53 when the core tube 43 shown in FIG. 11 is dropped. For this reason, the lower heater 53 can be reliably protected from the core tube 43. Further, by adjusting the restriction amount of the stopper, the maximum descending amount of the support surface 600 can be set to be equal to or less than the stroke amount of the lever 680 of the limit switch 68 in the vertical direction. In this way, the lever 680 can be protected from the shaft 67 (that is, the core tube 43).

  Instead of the limit switch 68 shown in FIG. 10, a contact sensor such as a strain gauge or a load sensor may be arranged as a sensor. Further, a non-contact type sensor such as a proximity sensor may be arranged.

  1: rotary kiln, 2: supply part, 20: bearing part, 21: supply side cover, 22: supply hopper, 23: screw feeder, 3: discharge part, 30: bearing part, 31: discharge side cover, 310: discharge port 4, rotating part, 40: supply side rotating shaft, 41: supply side gear, 42: supply side holder, 43: core tube, 43a: front side part, 43b: rear side part, 430: discharge port, 44: discharge side Rotation shaft, 45: discharge side gear, 46: discharge side holder, 5: heating unit, 50: outer shell, 51: heat insulating material, 52: heating chamber, 53: heater, 55: spring case, 6: detection unit, 60 : Support member, 60a: support, 60b: support, 60c: insulating plate, 600: support surface, 600a: support surface, 600b: support surface, 61: electrode, 61a: electrode, 61b: electrode, 62: electrode, 63: Resistance meter (sensor), 64: Electricity , 65: ammeter (sensor), 66: coil spring, 67: shaft, 68: limit switch (sensor), 680: lever, 70: control device, 71: display device, 9: mount, 90: base, 91: Supply stand, 92: Discharge stand, A: Interval, C: Detection circuit, S: Contact, ac: Altitude

Claims (6)

A core tube that rotates around its own axis;
A heating section having a heating chamber through which the core tube is inserted;
A support member that is disposed inside the heating chamber, is disposed at a predetermined interval below the core tube, and is capable of supporting the core tube deformed downward beyond the predetermined interval;
A sensor for detecting that the deformed core tube is in contact with the support member;
Rotary kiln with The heating unit is disposed inside the heating chamber, and has a heater for heating the core tube from below.
The support member has a support surface capable of supporting the core tube,
The rotary kiln according to claim 1, wherein the support surface is disposed at a position higher than the heater.   The rotary kiln according to claim 1 or 2, wherein the sensor is disposed outside the heating chamber. The core tube and the support member are both made of a conductor,
And a detection circuit that passes through at least a part of the core tube, the support member, and a power source,
The rotary kiln according to any one of claims 1 to 3, wherein the sensor detects a change in the amount of electricity when the furnace core tube abuts on the support member and a contact of the detection circuit is closed or opened. . The support member is movable downward;
The rotary kiln according to any one of claims 1 to 3, wherein the sensor detects movement of the support member when the furnace core tube contacts the support member. And a control device electrically connected to the sensor, and a display device electrically connected to the control device,
The control device determines the state of the core tube based on the signal detected by the sensor,
The rotary kiln according to any one of claims 1 to 5, wherein the display device displays information related to a determination result of the control device.

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