JP6151552B2 - Rotary kiln seal structure and rotary kiln - Google Patents

Description

  The present invention relates to a rotary kiln seal structure and a rotary kiln for conveying an object to be processed in the axial direction while swinging in a circumferential direction.

  Patent Document 1 discloses a rotary kiln seal structure. The opening on the downstream side of the retort is covered with a discharge cylinder. A rotating flange portion projects from the outer peripheral surface of the retort. On the other hand, a fixed flange portion is arranged in the discharge cylinder. The fixed flange portion includes a sealing material. The sealing material is in sliding contact with the outer peripheral surface of the rotating flange portion. By the said sealing material, it can suppress that the atmospheric gas inside a retort leaks outside the rotary kiln. Patent Document 2 exemplifies high-purity quartz glass as a retort material.

JP 2003-21461 A Japanese Patent Laid-Open No. 10-148469

  If the retort of Patent Document 1 is made of quartz glass of Patent Document 2, the following problems occur. That is, the retort made of quartz glass is transparent. On the other hand, the workpiece is heated in the retort. For this reason, radiant heat is generated from the object to be processed. Radiant heat is transmitted through the side wall of the transparent retort, transmitted to the rotating flange, and absorbed. For this reason, a sealing material will be heated via a rotation flange part.

  As described above, when the seal interface between the rotating flange portion and the seal member is disposed on the radially outer side of the retort and the retort is transparent, the seal member is damaged by the radiant heat from the workpiece. There is a risk of receiving.

  SUMMARY OF THE INVENTION An object of the present invention is to provide a rotary kiln seal structure and a rotary kiln in which radiant heat from an object to be processed in a rotating cylinder portion is hardly transmitted to a seal interface.

  (1) In order to solve the above-mentioned problems, the rotary kiln seal structure of the present invention has a heat treatment chamber in which heat treatment can be performed on an object to be processed that can rotate about its own axis and flow in the axial direction. A rotary kiln seal structure having a transparent rotating cylinder part, the rotating side radial extending part projecting radially outward from the outer peripheral surface of the rotating cylinder part, and the rotating side radial extending part in the axial direction A rotating flange portion having an annular rotation-side axial extension portion; and a rotation flange portion that is disposed independently of the rotation cylinder portion on the radially outer side of the rotation-side axial extension portion, and the rotation-side axial direction. A fixed flange portion having an annular fixed-side axial extension portion that forms an annular seal interface with the extension portion, and inserted between the rotary cylinder portion and the rotary-side axial extension portion, Radiant heat generated from the object to be processed in the rotating cylinder part is in the axial direction of the rotating side. And suppresses heat shielding portion from being transferred to the stationary section, characterized in that it comprises a.

  Here, “arranged independently from the rotating cylinder part” means that the rotating cylinder part is not fixed. That is, it means not rotating together with the rotating cylinder portion. Radiant heat is generated when electromagnetic waves generated from an object to be processed are absorbed by an object (for example, a rotating cylinder). Therefore, “transparent” of the rotating cylinder portion means that the electromagnetic wave from the object to be processed is less likely to be absorbed than when the rotating cylinder portion is colored. “Transparent” includes colorless and transparent, colored and transparent, totally transparent, translucent (for example, frosted glass) and the like.

  According to the seal structure of the rotary kiln of the present invention, the heat shield portion is disposed between the rotating cylinder portion and the rotating side axially extending portion. For this reason, it can suppress that radiant heat is transmitted to the rotation side axial direction extension part and by extension, a seal interface. Therefore, the lifetime of the member that forms the seal interface can be extended. As a result, the running cost of the rotary kiln can be reduced.

  (1-1) Preferably, in the configuration of (1) above, the rotating cylinder portion is preferably made of quartz glass. The rotating cylinder portion of this configuration is excellent in heat resistance and workability.

  (2) Preferably, in the configuration of the above (1), the heat shield portion is preferably a heat reflecting portion that reflects at least a part of the radiant heat. According to this configuration, by reflecting at least a part of the radiant heat, it is possible to suppress the radiant heat from being transmitted to the rotating side axially extending portion, and hence to the seal interface.

  (3) Preferably, in the configuration of (2) above, the heat reflecting portion is made of metal, and is preferably a heat reflecting member disposed on the outer peripheral surface of the rotating cylinder portion. According to this structure, the metal heat reflection member excellent in heat resistance and reflectivity can be arrange | positioned on the outer peripheral surface of a rotation cylinder part.

  (3-1) Preferably, in the configuration of the above (3), the heat reflecting member is formed by applying a paint containing metal to the outer peripheral surface of the rotating cylinder portion. Good. According to this configuration, the heat reflecting member can be easily manufactured.

  (3-2) Preferably, in the configuration of (3) above, the heat reflecting member is preferably formed by covering the outer peripheral surface of the rotating cylinder portion with a metal foil. According to this configuration, the heat reflecting member can be easily manufactured.

  (4) Preferably, in the configuration of the above (1), the heat shield portion may be a heat absorption portion that absorbs at least a part of the radiant heat. According to this configuration, by absorbing at least a part of the radiant heat, it is possible to suppress the radiant heat from being transmitted to the rotation side axially extending portion, and hence to the seal interface.

  (5) Preferably, in any one of the configurations (1) to (4), a gap is defined between the heat shield portion and the rotation side axially extending portion. Is good. According to this configuration, the gas in the gap acts as a heat insulating material. For this reason, it can suppress that the heat of thermal insulation part itself is transmitted to the rotation side axial direction extension part.

  (6) Preferably, in any one of the configurations (1) to (5), it is preferable to provide a cooling unit that cools the seal interface. According to this configuration, the seal interface can be cooled by the cooling unit while blocking the radiant heat from the object to be processed by the heat blocking unit.

  (6-1) Preferably, in the configuration of the above (6), the cooling unit cools the seal interface from the radially inner side of the rotation side axially extending portion and supplies the cooling interface to the cooling unit. It is better to have a configuration including a refrigerant adjusting unit that adjusts at least one of the temperature and flow rate of the refrigerant.

  The rotary kiln seal structure of this configuration includes a refrigerant adjustment unit. The refrigerant adjustment unit can adjust at least one of the temperature and flow rate (volume flow rate) of the refrigerant. That is, the temperature of the refrigerant can be lowered. Further, the flow rate of the refrigerant can be increased. For this reason, according to this configuration, the seal interface can be sufficiently cooled.

  (6-2) Preferably, in the configuration of (6), the cooling unit is inserted between the rotating cylinder unit, the rotating side radial extending unit, and the rotating side axial extending unit, It is better to have a refrigerant supply part that supplies the refrigerant toward the rotation side axially extending part.

  If the refrigerant is supplied to the rotating cylinder part, the seal interface is indirectly cooled via the rotating cylinder part, the rotation-side radial extension part, and the rotation-side axial extension part. For this reason, the seal interface cannot be sufficiently cooled.

  On the other hand, according to this structure, a refrigerant | coolant is supplied from the refrigerant | coolant supply part of a cooling part to the rotation side axial direction extension part instead of a rotation cylinder part. That is, the refrigerant is supplied to the rotating side axially extending portion that forms the seal interface. For this reason, the seal interface can be sufficiently cooled.

  Further, the seal interface is at a lower temperature than the outer peripheral surface of the rotating cylinder portion. In this respect, according to this configuration, the seal interface can be cooled without going through the high-temperature rotating cylinder portion. For this reason, less energy is required for cooling the seal interface. Thus, this structure is excellent in energy saving property.

  (6-3) Preferably, in the configuration of (6-1), the refrigerant is a liquid, and the cooling portion protrudes radially inward from an inner peripheral surface of the rotation-side axially extending portion. An annular partition wall, an annular cooling tank that is partitioned between the partition wall, the rotation-side axially extending portion, and the rotation-side radial extending portion, and in which the liquid is accumulated near the lowermost portion; and the cooling An annular liquid absorption part that is laid on the bottom of the tank and absorbs the liquid, and the refrigerant adjustment part includes a heat exchanger that forms a circulation path of the liquid with the cooling tank, and the circulation A flow meter for measuring the flow rate of the liquid in the path, a thermometer for measuring the temperature of the liquid in the circulation path, a pump for adjusting the flow rate of the liquid in the circulation path, the flow meter and the thermometer Control at least one of the pump and the heat exchanger based on the transmitted detection signal A control unit that is better configured to have a.

  The cooling unit includes a partition wall, a cooling tank, and a liquid absorption unit. The cooling tank is disposed between a partition wall extending in the radial direction, a rotation side axial extension portion extending in the axial direction, and a rotation side radial extension portion extending in the radial direction. Yes. The cooling tank is arranged in an annular shape on the entire circumference outside the rotating cylinder portion in the radial direction. In the vicinity of the lowermost part of the cooling tank, a liquid that is a refrigerant accumulates due to its own weight. Even if the cooling tank rotates together with the rotating cylinder, the liquid stays near the lowermost part of the cooling tank due to its own weight.

  The liquid absorbing portion is laid on the bottom surface of the cooling tank (the inner peripheral surface of the rotating side axially extending portion). Similar to the cooling tank, the liquid absorption part is arranged annularly around the entire circumference of the rotating cylinder part in the radial direction. The liquid absorption part can absorb liquid.

  When the liquid absorbing part rotates together with the rotating cylinder part, the liquid absorbing part passes near the lowermost part of the cooling tank. That is, it passes through the liquid. At this time, the liquid absorber is cooled. Moreover, when the liquid absorption part is in a state capable of absorbing the liquid (when the saturated absorption amount is not reached), the liquid is absorbed. The liquid absorbing portion rotates with the rotation of the rotating cylinder portion.

  Thus, according to this structure, the liquid absorption part containing a liquid is arrange | positioned to the outer periphery of the radial direction of a rotation cylinder part perimeter with rotation of a rotation cylinder part. For this reason, the seal interface can be cooled all around.

  Moreover, the refrigerant | coolant adjustment part is provided with the heat exchanger, the flow meter, the thermometer, the pump, and the control part. For this reason, in the liquid absorption part and the cooling tank, the liquid heated by the cooling of the seal interface can be cooled by the heat exchanger and returned to the liquid absorption part and the cooling tank again. That is, the liquid can be circulated and used. Therefore, the running cost of the rotary kiln can be reduced. Further, the control unit can control at least one of the pump and the heat exchanger based on the detection signal transmitted from the flow meter and the thermometer. For this reason, at least one of the flow rate (circulation amount) and temperature of the liquid can be adjusted.

  (6-4) Preferably, in the configuration of (6-3), the refrigerant adjustment unit includes a level meter that measures a liquid level in the cooling tank, and the control unit includes the flow meter, the temperature, In addition to the meter, it is preferable to control at least one of the pump and the heat exchanger based on a detection signal transmitted from the level meter.

  According to this configuration, the control unit can control at least one of the pump and the heat exchanger based on the detection signal transmitted from the flow meter, the thermometer, and the level meter. For this reason, at least one of the flow rate (circulation amount) and temperature of the liquid can be adjusted more precisely. Moreover, the overflow of the liquid from a cooling tank can be controlled.

  (6-5) Preferably, in the configuration of (6-3) above, the cooling section is interposed between the partition wall and the rotation side radial extending section, and divides the cooling tank into a plurality of parts. A partition wall and a refrigerant discharge section that discharges the refrigerant, and one of the plurality of cooling tanks is supplied with the liquid from the refrigerant adjustment section via the refrigerant supply section. A cooling tank, and another one of the plurality of cooling tanks is a cooling tank that discharges the liquid to the refrigerant adjustment unit via the refrigerant discharge unit. It is preferable that the cooling tanks are configured to flow in order from the supply side to the discharge side.

  According to this structure, a liquid contacts a liquid absorption part, flowing between several cooling tanks. For this reason, heat exchange can be performed efficiently between the cooling tank and the liquid absorption part. That is, with the rotation of the rotating cylinder part, the liquid absorbing part that starts around the lowermost part of the cooling tank, goes around the rotating cylinder part, and arrives again near the lowermost part of the cooling tank, in other words, the axial direction of the rotating side The liquid absorbing part heated by heat exchange with the extending part (seal interface) can be efficiently cooled.

  Further, the liquid flows through a path of the refrigerant supply unit → the plurality of cooling tanks → the refrigerant discharge unit. For this reason, it can suppress that the place (for example, a factory floor, a mount stand, etc.) where a rotary kiln is arrange | positioned gets wet with a liquid.

  (6-6) Preferably, in the configuration of (6-2), the refrigerant is a gas, and the cooling unit includes the rotating cylinder unit, the rotating side radial extending unit, and the rotating side axial direction. A cooling unit main body that is annularly disposed between the extension unit, and a plurality of the refrigerant supply units are arranged in the cooling unit main body at a predetermined interval in the circumferential direction, and the refrigerant adjustment unit includes: , A compressor, and a gas interposed between the compressor and the cooling unit main body, and pumped from the compressor, is separated into a low temperature gas and a high temperature gas, and the low temperature gas is separated into the cooling unit main body. It is better to have a configuration having a vortex tube to be supplied.

  The cooling unit includes a cooling unit main body and a plurality of refrigerant supply units. The cooling unit main body is disposed between the rotating cylinder portion extending in the axial direction, the rotating side radial extending portion extending in the radial direction, and the rotating side axial extending portion extending in the axial direction. Has been. The cooling unit main body is annularly arranged on the outer circumference in the radial direction of the rotating cylinder part. The plurality of refrigerant supply units are arranged at predetermined intervals in the circumferential direction in the cooling unit main body.

  According to this structure, the several refrigerant | coolant supply part is arrange | positioned by the cooling part main body at the perimeter. For this reason, the seal interface can be cooled all around.

  Moreover, the refrigerant | coolant adjustment part is provided with the compressor and the vortex tube. For this reason, the gas pumped from the compressor can be separated into a low temperature gas and a high temperature gas by the vortex tube. Of these, the refrigerant adjustment unit selectively supplies only the low-temperature gas to the cooling unit main body. Therefore, the temperature of the gas that is the refrigerant can be lowered. Moreover, since gas is used as the refrigerant, it is possible to prevent the place where the rotary kiln is disposed (for example, a factory floor or a stand) from being contaminated.

  (6-7) Preferably, in the configuration of (6-6) above, the gas is supplied from the refrigerant supply unit in the vicinity of the inner peripheral surface of the rotation-side axial extension portion and the rotation-side radial extension portion. A structure that flows out from between the rotating cylinder part, the rotating side radial extending part, and the rotating side axial extending part through the vicinity of one axial surface of the rotating cylinder part and the outer peripheral surface of the rotating cylinder part. Better to do.

  According to this configuration, the gas flows from the outer side in the radial direction along the path of the vicinity of the inner peripheral surface of the rotation-side axial extension portion → the vicinity of one axial surface of the rotation-side radial extension portion → the vicinity of the outer peripheral surface of the rotation cylinder portion. It flows so as to turn in a C shape inward. For this reason, the gas heated by the heat exchange with the rotation side axial extension part (seal interface) is between the rotation cylinder part, the rotation side radial extension part, and the rotation side axial extension part. It is hard to stay in space.

  (7) In order to solve the above-mentioned problems, the rotary kiln of the present invention is characterized by including a rotary kiln seal structure having any one of the constitutions (1) to (6). According to the rotary kiln of the present invention, at least a part of the radiant heat generated from the object to be processed in the rotating cylinder portion can be reflected by the heat reflecting portion. Therefore, it can suppress that radiant heat is transmitted to the rotation side axial direction extension part and by extension, a seal interface.

  Moreover, according to the rotary kiln of the present invention, the rotating cylinder portion is transparent. For this reason, the state of the workpiece on the radially inner side of the rotating cylinder part can be visually recognized from the radially outer side of the rotating cylinder part. Therefore, it is suitable for use as, for example, an experimental furnace.

  According to the present invention, it is possible to provide a rotary kiln seal structure and a rotary kiln in which radiant heat from an object to be processed in the rotating cylinder portion is hardly transmitted to the seal interface.

It is an axial sectional view of the rotary kiln of a first embodiment. It is an axial sectional view near the seal structure on the rear side of the rotary kiln. It is the III-III direction sectional drawing of FIG. It is an enlarged view in the frame IV of FIG. It is an axial sectional view near the seal structure on the rear side of the rotary kiln of the second embodiment. FIG. 6 is a sectional view in the VI-VI direction of FIG. 5. It is an enlarged view in the frame VII of FIG.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a rotary kiln seal structure and a rotary kiln embodiment 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 FIG. 1, the axial sectional view of the rotary kiln of this embodiment is shown. As shown in FIG. 1, the rotary kiln 1 of the present embodiment includes a rotating cylinder portion 2, a supply device 3, a pair of front and rear seal structures 4, a heating device 5, and a pair of front and rear tire receiving devices 60. ing.

(Rotating cylinder part 2)
The rotating cylinder portion 2 is made of quartz glass and has a cylindrical shape. The rotating cylinder part 2 is transparent. The rotary cylinder portion 2 extends in the front-rear direction (axial direction). The rotating cylinder portion 2 is disposed substantially horizontally. Specifically, the rotating cylinder portion 2 is slightly inclined downward from the front side (upstream side) to the rear side (downstream side).

  A pair of front and rear tires 200 is mounted on the outer peripheral surface of the rotating cylinder portion 2. A heat treatment chamber 210 is defined inside the rotating cylinder portion 2. In addition, atmospheric gas is supplied to the inside of the rotating cylinder portion 2. As shown by the arrows in FIG. 1, the workpiece W flows through the heat treatment chamber 210 from the front side toward the rear side. The rotating cylinder part 2 is transparent. For this reason, the to-be-processed object W inside the rotation cylinder part 2 can be visually recognized from the exterior of the rotation cylinder part 2 via the side surrounding wall of the rotation cylinder part 2. FIG.

(Tire receiving device 60)
The pair of front and rear tire receiving devices 60 are fixed to a gantry (not shown). Each of the pair of front and rear tire receiving devices 60 includes a pair of left and right receiving rollers 600. The front tire receiving device 60 is mounted with a front tire 200 of the rotary cylinder portion 2. A rear tire 200 is mounted on the rear tire receiving device 60. For this reason, the rotating cylinder part 2 is rotatable around the center axis A of itself on the pair of front and rear tire receiving devices 60.

(Heating device 5)
The heating device 5 includes an outer wall 50, a heat insulating wall 51, and a number of heaters 52. The outer wall 50 is made of stainless steel and has a rectangular parallelepiped box shape. The heat insulating wall 51 is formed by combining a large number of refractory bricks. The heat insulating wall 51 is fixed to the inner surface of the outer wall 50. A large number of heaters 52 are inserted into the heat insulating wall 51. A large number of heaters 52 heats the heat treatment chamber 210 of the rotating cylinder portion 2 from the outside.

(Supply device 3)
The supply device 3 includes a supply hopper 30 and a screw feeder 31. The supply device 3 is fixed to the gantry. The supply device 3 is disposed on the front side of the rotary cylinder portion 2. The screw feeder 31 is inserted into the opening 2 f on the front side of the rotating cylinder portion 2. The supply hopper 30 is disposed above the screw feeder 31. The workpiece W is supplied from the supply hopper 30 to the rotating cylinder portion 2 via the screw feeder 31.

(Seal structure 4)
The pair of front and rear seal structures 4 seals the openings 2 f and 2 r on both front and rear sides of the rotating cylinder portion 2. The configuration of the pair of front and rear seal structures 4 is substantially the same. That is, the difference between the two is that, as will be described later, the front seal structure 4 includes a cover member 43, whereas the rear seal structure 4 includes a discharge cylinder 44. The arrangement of the pair of front and rear seal structures 4 is symmetrical in the front-rear direction. Here, as a representative of the pair of front and rear seal structures 4, the rear seal structure 4 will be described.

  FIG. 2 shows an axial sectional view of the vicinity of the seal structure on the rear side of the rotary kiln of the present embodiment. FIG. 3 shows a cross-sectional view in the III-III direction of FIG. FIG. 4 shows an enlarged view in the frame IV of FIG. As shown in FIGS. 2 to 4, the rear seal structure 4 includes a rotating flange portion 40, a fixed flange portion 41, a flexible tube 42, a discharge cylinder 44, a cooling portion 47, and a refrigerant adjusting portion 48. And a heat reflecting member 49.

  The heat reflecting member 49 is made of an aluminum plate and has a cylindrical shape. The heat reflecting member 49 is fixed to the outer peripheral surface of the rear end portion of the rotating tube portion 2 by a binding band (not shown).

  The rotating flange portion 40 includes a rotating side radial extending portion 400 and a rotating side axial extending portion 401. The rotation side radially extending portion 400 includes an extending portion main body 400a and a radial seal material 400b. The extension part main body 400a is made of quartz glass and has an annular shape. The extending portion main body 400a is provided so as to protrude radially outward from the outer peripheral surface of the rotating cylinder portion 2 (the rear portion of the heat reflecting member 49). The radial direction sealing material 400b is made of a gland packing and has an annular shape. The radial direction sealing material 400b is fixed to the extending portion main body 400a.

  The rotation side axially extending portion 401 is made of quartz glass and has a short-axis cylindrical shape. The rotation side axially extending portion 401 projects from the outer peripheral edge of the front surface of the extending portion main body 400a to the front side (one axial direction). The rotation side axially extending portion 401 and the heat reflecting member 49 are opposed to each other in the radial direction. In other words, the heat reflecting member 49 is interposed between the workpiece W inside the rotating cylinder portion 2 and the rotating side axially extending portion 401.

  The fixed flange portion 41 includes a fixed-side radial extending portion 410 and a fixed-side axial extending portion 411. The fixed-side radial extending portion 410 is made of stainless steel and has an annular shape. The fixed side radially extending portion 410 is disposed on the rear side of the rotating side radially extending portion 400. A radial seal interface SB is formed between the front surface of the fixed-side radial extension portion 410 and the rear surface of the rotation-side radial extension portion 400 (specifically, the rear surface of the radial seal member 400b). ing. As shown in FIG. 2, the radial seal interface SB suppresses the atmospheric gas G <b> 4 inside the rotating cylinder portion 2 from leaking outside the rotary kiln 1. Further, the radial seal interface SB suppresses the air outside the rotary kiln 1 from flowing into the rotary cylinder portion 2.

  The fixed-side axial extending portion 411 includes an extending portion main body 411a and two axial seal materials 411b. The fixed-side axially extending portion 411 is disposed on the radially outer side of the rotating-side axially extending portion 401. The extension part main body 411a is made of stainless steel and has a short-axis cylindrical shape. The two axial seal materials 411b are each made of silicon packing and have an annular shape. The two axial direction sealing materials 411b are being fixed to the extension part main body 411a. Between the inner peripheral surface of the fixed-side axial extending portion 411 (specifically, the inner peripheral surfaces of the two axial seal members 411b) and the outer peripheral surface of the rotating-side axial extending portion 401, there are two Two axial seal interfaces SA are formed. Each of the two axial seal interfaces SA is included in the concept of “seal interface” of the present invention. As shown in FIG. 2, the two axial seal interfaces SA prevent the atmospheric gas G <b> 4 inside the rotating cylinder part 2 from leaking outside the rotary kiln 1. In addition, the two axial seal interfaces SA prevent air outside the rotary kiln 1 from flowing into the rotary cylinder portion 2. In the leakage flow path of the atmospheric gas G4, the two axial seal interfaces SA are arranged on the downstream side of the radial seal interface SB.

  As shown in FIG. 2, the discharge cylinder 44 is made of stainless steel and has a cylindrical shape extending in the vertical direction. The discharge cylinder 44 covers the opening 2r on the rear side of the rotary cylinder part 2 from the rear side (the outside in the axial direction). An atmosphere gas G 4 can be supplied into the discharge cylinder 44 through a valve 95. The workpiece W can be discharged through the rotary valve 96 from the opening at the lower end of the discharge cylinder 44.

  The flexible tube 42 is made of stainless steel and has a short-axis cylindrical shape extending in the front-rear direction. The flexible tube 42 has a bellows part. The flexible tube 42 is disposed on the outer side in the radial direction of the rotating cylinder portion 2. The flexible tube 42 connects the fixed flange portion 41 and the discharge tube 44 so as to be able to change the center.

  As shown in FIG. 4, the cooling unit 47 includes a cooling unit main body 470 and twelve refrigerant supply units 471. The cooling unit main body 470 is stainless steel and has an annular shape. The cooling unit main body 470 is an annular pipe (which may be an integral body or may be a combined body formed by connecting a plurality of arc-shaped pipes). The cooling unit main body 470 is accommodated in a space between the heat reflecting member 49, the rotation-side radial extension 400, and the rotation-side axial extension 401. The refrigerant supply unit 471 is a hole formed in the cooling unit main body 470. The refrigerant supply unit 471 faces the radially outer side and the rear side (the inner peripheral surface side of the rotation-side axially extending portion 401). As shown in FIG. 3, the twelve refrigerant supply units 471 are arranged with a central axis A as a center and spaced apart by 30 ° in the circumferential direction. As shown in FIG. 4, the refrigerant adjustment unit 48 includes a compressor 480 and a vortex tube 481.

  The air G1 pumped from the compressor 480 is separated into the low temperature air G2 and the high temperature air G3 by the vortex tube 481. Among these, the low-temperature air G <b> 2 is introduced into the cooling unit main body 470. The low-temperature air G <b> 2 is blown to the inner peripheral surface of the rotation-side axially extending portion 401 via the refrigerant supply portion 471. The blown air G2 flows into the flow path C2 (specifically, near the inner peripheral surface of the rotation-side axially extending portion 401 → the front surface (one surface in the axial direction) of the rotation-side radially extending portion 400 → the heat reflecting member. 49 is discharged from the space between the heat reflecting member 49, the rotation-side radial extending portion 400, and the rotation-side axial extending portion 401 via the flow path C2) passing through the vicinity of the outer peripheral surface of 49.

(Cover member 43 of seal structure 4 on the front side)
As described above, the difference between the pair of front and rear seal structures 4 is that the front seal structure 4 includes the cover member 43, whereas the rear seal structure 4 includes the discharge cylinder 44. is there. That is, as shown in FIG. 1, the front seal structure 4 includes a cover member 43. The cover member 43 is made of stainless steel and has a bottomed cylindrical shape (cup shape) that opens to the rear side. A screw feeder 31 is inserted through the center of the front bottom wall of the cover member 43.

[Movement during heat treatment of rotary kiln]
Next, the movement during the heat treatment of the rotary kiln of the present embodiment will be briefly described. As shown in FIG. 1, the workpiece W is supplied from a supply hopper 30 to the inside of the rotary cylinder portion 2 via a screw feeder 31. As shown in FIG. 2, a predetermined atmospheric gas G <b> 4 is supplied into the rotary cylinder portion 2. The rotating cylinder portion 2 rotates around its own central axis A while being supported by a pair of front and rear tire receiving devices 60. The workpiece W flows from the front side to the rear side in the inside of the rotary cylinder part 2, that is, the heat treatment chamber 210, while swinging by the rotation of the rotary cylinder part 2. When flowing, the workpiece W is heat-treated by heat from the heating device 5. The workpiece W after the heat treatment is discharged from the opening at the lower end of the discharge tube 44 through the rotary valve 96.

[Movement of rotary kiln seal structure]
Next, the movement of the seal structure of the rotary kiln of the present embodiment will be described. Connected to the rotary kiln 1 are a supply pipe (not shown) for supplying the atmosphere gas G4 to the inside of the rotating cylinder part 2 and a discharge pipe (not shown) for discharging the atmosphere gas G4 from the inside of the rotating cylinder part 2. ing. However, the atmospheric gas G4 inside the rotating cylinder part 2 includes a rotating side member (for example, the rotating cylinder part 2 and the rotating flange part 40) and a fixed side member (for example, the fixed flange part 41, the flexible tube 42, the cover member 43). And the discharge tube 44). Specifically, as shown in FIG. 4, leakage is attempted from between the rotating flange portion 40 and the fixed flange portion 41. Therefore, a radial seal interface SB extending in the radial direction and two axial seal interfaces SA extending in the axial direction are set between the rotating flange portion 40 and the fixed flange portion 41. . The radial seal interface SB is formed between the front surface of the fixed-side radial extending portion 410 and the rear surface of the radial seal material 400b. Each of the two axial seal interfaces SA is formed between the inner peripheral surface of the axial seal material 411b and the outer peripheral surface of the rotation-side axial extending portion 401. Thus, the seal structure 4 has a total of three seal interfaces (the radial seal interface SB and the two axial seal interfaces SA). For this reason, it can suppress that atmospheric gas G4 inside the rotation cylinder part 2 leaks outside the rotary kiln 1. Further, it is possible to suppress the air outside the rotary kiln 1 from flowing into the rotary cylinder portion 2.

  Here, the rotating cylinder part 2 is transparent. In addition, a high temperature workpiece W flows inside the rotary cylinder portion 2. For this reason, if the heat reflecting member 49 is not disposed, the radiant heat from the workpiece W passes through the heat transfer path H2 as shown by a dotted arrow in FIG. Transmitted to SA. That is, in the heat transfer path H <b> 2, the space between the workpiece W → the rotating cylinder portion 2 → the outer peripheral surface of the rotating cylinder portion 2 and the inner peripheral surface of the rotation side axial extension portion 401 → the rotation side axial extension. Heat is transferred in the order of the existing portion 401 to the two axial seal interfaces SA. Thus, the two axial seal interfaces SA are easily heated by the radiant heat from the workpiece W. For this reason, two axial direction sealing materials 411b are easy to deteriorate.

  Further, the extending portion main body 400a and the rotating side axially extending portion 401 of the rotating side radial extending portion 400 are both made of quartz glass and are transparent. For this reason, the radiant heat from the to-be-processed object W tends to permeate | transmit the extended part main body 400a and the rotation side axial direction extended part 401. FIG. On the other hand, both the fixed-side radial extending portion 410 and the extending-side main body 411a of the fixed-side axial extending portion 411 are made of stainless steel. For this reason, the radiant heat from the to-be-processed object W is easy to be reflected and absorbed by the fixed side radial direction extension part 410 and the extension part main body 411a. Therefore, radiant heat (that is, electromagnetic waves) is likely to be irregularly reflected in the gap between the rotation-side axial extension 401 and the extension main body 411a of the fixed-side extension 411. That is, heat tends to accumulate in the gap. Also in this respect, the two axial seal materials 411b are likely to deteriorate.

  In this regard, the seal structure 4 of the present embodiment includes a heat reflecting member 49. For this reason, as shown by solid line arrows in FIG. 4, the radiant heat from the workpiece W can be reflected on the inner peripheral surface of the heat reflecting member 49. That is, the heat transfer path H2 can be blocked. For this reason, the two axial seal interfaces SA are not easily heated by the radiant heat from the workpiece W. Therefore, the two axial seal materials 411b are unlikely to deteriorate.

  Moreover, as shown in FIG. 4, the heat of the rotating cylinder part 2 is transmitted to the two axial seal interfaces SA via the heat transfer path H1. That is, in the heat transfer path H1, heat is transferred mainly in the order of the rotating cylinder portion 2 → the rotating side radial extending portion 400 → the rotating side axial extending portion 401 → the two axial seal interfaces SA mainly by heat conduction. Communicated. Further, heat is transferred to the radial seal interface SB via the rotation-side radial extending portion 400.

  In this regard, the seal structure 4 of this embodiment includes a cooling unit 47 and a refrigerant adjustment unit 48. The air G2 flows so as to swirl via the flow path C2. For this reason, the rotation side axial direction extension part 401 (two axial direction seal interface SA) and the rotation side radial direction extension part 400 (radial direction seal interface SB) can be cooled with the air G2. Further, the heat reflecting member 49 can be cooled by the air G2.

[Function and effect]
Next, the effect of the rotary kiln of this embodiment is demonstrated. As shown in FIG. 2, the seal structure 4 of the rotary kiln 1 of this embodiment includes a rotating flange portion 40. The rotating flange portion 40 rotates together with the rotating cylinder portion 2. On the other hand, the fixed flange portion 41 is independent from the rotating cylinder portion 2. For this reason, relative positional deviation tends to occur between the rotating flange portion 40 and the fixed flange portion 41. Therefore, the sealing performance of the two axial seal interfaces SA and the radial seal interface SB is likely to deteriorate.

  In this regard, the seal structure 4 of the rotary kiln 1 of this embodiment includes a flexible tube 42. Due to the deformation of the flexible tube 42, it is possible to absorb a relative displacement between the rotating flange portion 40 and the fixed flange portion 41. For this reason, the sealing performance of the two axial seal interfaces SA and the radial seal interface SB is unlikely to deteriorate.

  As shown in FIGS. 1 and 2, the seal structure 4 of the rotary kiln 1 of the present embodiment includes a cover member 43 and a discharge cylinder 44. For this reason, the opening parts 2f and 2r of the rotating cylinder part 2 can be covered in a bag shape from the outside.

  Further, as shown in FIG. 4, the seal structure 4 of the rotary kiln 1 of this embodiment includes a heat reflecting member 49. For this reason, the radiant heat from the workpiece W can be reflected on the inner peripheral surface of the heat reflecting member 49. That is, the heat transfer path H2 can be blocked. For this reason, it can suppress that the radiant heat from the to-be-processed object W is transmitted to the rotation side axial direction extension part 401 and by extension, two axial direction sealing interface SA. Therefore, the lifetime of the two axial direction sealing materials 411b can be extended. As a result, the running cost of the rotary kiln 1 can be reduced.

  In addition, as shown in FIG. 4, the heat reflecting member 49 is disposed on the radially inner side of the cooling unit 47. For this reason, it is possible to suppress the cooling unit 47 from being heated by the radiant heat from the workpiece W. Therefore, the air G2 blown out from the refrigerant supply unit 471 cools the rotation-side axial extension 401 (two axial seal interfaces SA) and the rotation-side radial extension 400 (radial seal interface SB). It is possible to suppress preheating before.

  The rotating cylinder portion 2 is made of quartz glass. For this reason, the rotating cylinder part 2 is excellent in heat resistance and workability. Moreover, the rotating cylinder part 2 has low reactivity with the workpiece W. For this reason, it is suitable when a substance that dislikes metal contamination (for example, LFP (lithium iron phosphate), LMP (lithium manganese phosphate), carbon, etc.) is used as the workpiece W.

  Further, as shown in FIG. 3, a radial gap is defined between the heat reflecting member 49 and the rotation side axially extending portion 401. As shown in FIG. 4, air G2 is supplied to the radial gap. The air G2 acts as a heat insulating material. Further, the air G2 flows through the flow path C2. For this reason, it can suppress that the heat of the heat | fever reflection member 49 itself is transmitted to the rotation side axial direction extension part 401. FIG.

  As shown in FIG. 4, the seal structure 4 of the rotary kiln 1 according to the present embodiment includes a cooling unit 47. For this reason, the two axial seal interfaces SA can be cooled by the cooling unit 47 while blocking the radiant heat from the workpiece W by the heat reflecting member 49.

  Moreover, the rotating cylinder part 2 is transparent. Moreover, as shown in FIG. 1, the rotation cylinder part 2 is a single cylinder. That is, a protective cylinder for protecting the rotary cylinder part 2 is not arranged on the radially outer side of the rotary cylinder part 2. Further, most of the rotating cylinder portion 2 (a portion other than the portion covered with the pair of front and rear seal structures 4, the pair of front and rear tires 200, and the heating device 5) is exposed to the outside. For this reason, the to-be-processed object W which flows through the inside of the rotation cylinder part 2 can be visually recognized from the exterior of the rotation cylinder part 2 through the side surrounding wall of the transparent rotation cylinder part 2. FIG.

  As shown in FIG. 3, according to the cooling unit 47 of the rotary kiln 1 of the present embodiment, twelve refrigerant supply units 471 are arranged in the cooling unit main body 470 around the entire circumference. The cooling unit 47 cools the two axial seal interfaces SA and the radial seal interface SB from the radially inner side of the rotation-side axially extending portion 401 around the entire circumference. For this reason, the two axial seal interfaces SA and the radial seal interface SB can be cooled over the entire circumference. Therefore, it is possible to suppress the two axial seal materials 411b and the radial seal material 400b from being locally degraded by heat. Therefore, the lifetimes of the two axial seal materials 411b and the radial seal material 400b can be extended. As a result, the running cost of the rotary kiln 1 can be reduced.

  Further, as shown in FIG. 4, the refrigerant adjustment unit 48 includes a vortex tube 481. For this reason, the temperature of the air G2 which is a refrigerant | coolant can be lowered | hung with respect to the air G1 of the compressor 480 exit side. Moreover, since the air G2 is used as the refrigerant, it is possible to prevent the place where the rotary kiln 1 is disposed (for example, a factory floor or a stand) from being contaminated.

  Moreover, as shown in FIG. 4, according to the cooling part 47 of the rotary kiln 1 of this embodiment, the air G2 flows so that it may turn via the flow path C2. For this reason, it is heated by heat exchange with the rotation-side axial extension 401 (two axial seal interfaces SA), the rotation-side radial extension 400 (radial seal interface SB), and the heat reflecting member 49. The air G <b> 2 is less likely to stay in the space between the heat reflecting member 49, the rotation-side radial extending portion 400, and the rotation-side axial extending portion 401. In addition, the air G <b> 2 injected from the refrigerant supply unit 471 is directly blown to the rotation-side axial extension unit 401. For this reason, the two axial seal interfaces SA can be preferentially cooled with respect to the radial seal interface SB.

<Second embodiment>
The difference between the rotary kiln of the present embodiment and the rotary kiln of the first embodiment is that the cooling unit is not air-cooled but water-cooled. Here, only differences will be described.

  FIG. 5 shows an axial sectional view of the vicinity of the seal structure on the rear side of the rotary kiln of the present embodiment. In addition, about the member corresponding to FIG. 2, it shows with the same code | symbol. FIG. 6 is a cross-sectional view in the VI-VI direction of FIG. In addition, about the member corresponding to FIG. 3, it shows with the same code | symbol. FIG. 7 shows an enlarged view in the frame VII of FIG. In addition, about the member corresponding to FIG. 4, it shows with the same code | symbol.

  As shown in FIGS. 5 to 7, the rear seal structure 4 includes a cooling unit 45, a refrigerant adjustment unit 46, and a heat reflecting member 49. As shown in FIG. 7, the cooling unit 45 includes a refrigerant supply unit 450, a partition wall 451, two cooling tanks 452, two water absorbing materials 453, a dividing wall 454, and a refrigerant discharge unit 455. ing. Each of the two water absorbing materials 453 functions as a liquid absorbing portion that absorbs and holds the liquid.

  The partition wall 451 is made of stainless steel and has an annular shape. The partition wall 451 protrudes radially inward from the front end of the inner peripheral surface of the rotation-side axially extending portion 401. The dividing wall 454 is made of stainless steel and has an annular shape. The dividing wall 454 protrudes radially inward from a substantially center in the front-rear direction of the inner peripheral surface of the rotation-side axially extending portion 401.

  The two cooling tanks 452 each have an annular shape. The two cooling tanks 452 are arranged in the front-rear direction. The front cooling tank 452 is partitioned between the rear surface of the partition wall 451 and the front surface of the dividing wall 454. The rear cooling tank 452 is partitioned between the rear surface of the dividing wall 454 and the front surface of the extension part main body 400a. As shown in FIG. 6, the cooling water L is accumulated near the lowermost part of the two cooling tanks 452 due to its own weight. The cooling water L is water. The two cooling tanks 452 can rotate around the central axis A of the rotating cylinder part 2 together with the rotating cylinder part 2. However, the cooling water L is always accumulated near the lowermost part of the cooling tank 452 due to its own weight.

  The two water absorbing materials 453 each have an annular shape. The two water absorbing materials 453 are each made of ceramic fiber. The two water absorbing materials 453 are arranged in the front-rear direction. As shown in FIGS. 6 and 7, the two water absorbing materials 453 can rotate around the central axis A of the rotating cylinder portion 2 together with the cooling tank 452 and the rotating cylinder portion 2. The front water-absorbing material 453 is laid on the bottom surface of the front cooling tank 452 (the inner peripheral surface of the rotation-side axially extending portion 401). The front water-absorbing material 453 can absorb the cooling water L accumulated in the front cooling tank 452. The rear water-absorbing material 453 is laid on the bottom surface of the rear cooling tank 452 (the inner peripheral surface of the rotation-side axially extending portion 401). The rear water absorbent 453 can absorb the cooling water L accumulated in the rear cooling tank 452.

  The refrigerant supply unit 450 is made of stainless steel and has a cylindrical shape. The refrigerant supply unit 450 supplies the cooling water L to the cooling tank 452 on the front side from the upper side (in the radial direction). The refrigerant discharge part 455 is made of stainless steel and has a cylindrical shape. The refrigerant discharge unit 455 discharges the cooling water L from the rear cooling tank 452. In this way, the cooling water L is supplied from the refrigerant supply unit 450 to the cooling tank 452 on the front side. The supplied cooling water L flows from the front cooling tank 452 to the rear cooling tank 452 by overflowing the dividing wall 454. The flowing cooling water L is discharged from the cooling tank 452 on the rear side by the refrigerant discharge portion 455.

  The refrigerant adjustment unit 46 includes a cooling tower 460, two flow meters 461, a thermocouple 462, a pump 463, a control unit 464, and a level meter 465. The cooling tower 460 forms a circulation path C1 of the cooling water L between the two cooling tanks 452. A flow meter 461 is disposed on the downstream side of the cooling tower 460. The flow meter 461 can measure the flow rate (volume flow rate) of the cooling water L on the outlet side of the cooling tower 460. On the downstream side of the flow meter 461, the above-described refrigerant supply unit 450 is disposed. On the other hand, a thermocouple 462 is arranged on the downstream side of the refrigerant discharge portion 455 described above. The thermocouple 462 can measure the temperature of the cooling water L on the outlet side of the refrigerant discharge portion 455. Another flow meter 461 is disposed on the downstream side of the thermocouple 462. The flow meter 461 can measure the flow rate (volume flow rate) of the cooling water L on the outlet side of the refrigerant discharge unit 455. A pump 463 is disposed on the downstream side of the flow meter 461 and the upstream side of the cooling tower 460. The pump 463 circulates the cooling water L. The level meter 465 can measure the water level of the cooling water L in the cooling tank 452. The control unit 464 includes an input / output interface (not shown) and a calculation unit. Detection signals are input from the two flow meters 461, the thermocouple 462, and the level meter 465 to the arithmetic unit via the input / output interface. Based on the input detection signal, the arithmetic unit issues an instruction to the pump 463. In response to the instruction, the pump 463 adjusts the flow rate of the cooling water L in the circulation path C1. Further, based on the input detection signal, the calculation unit issues an instruction to the cooling tower 460. In response to the instruction, the cooling tower 460 adjusts the temperature of the cooling water L.

  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, the seal structure 4 of the present embodiment includes a cooling unit 45 and a refrigerant adjustment unit 46. The cooling water L is pumped by the pump 463 and is injected from the cooling tower 460 into the cooling tank 452 on the rear side via the refrigerant supply unit 450. The injected cooling water L overflows the dividing wall 454 and flows into the cooling tank 452 on the front side. The cooling water L that has flowed in returns to the cooling tower 460 again via the refrigerant discharge portion 455.

  While the cooling water L stays in the two cooling tanks 452, the two cooling tanks 452 and members around the two cooling tanks 452 (two water-absorbing materials 453, partition walls 451, dividing walls 454, rotation side diameters) The heat exchange is performed between the direction extending portion 400 and the rotation side axial extending portion 401). By the heat exchange, the two axial seal interfaces SA and the radial seal interface SB are cooled.

  In particular, as shown in FIG. 6, the two water-absorbing materials 453 rotate around the central axis A of the rotating cylinder portion 2 and around the lowermost portions of the two cooling tanks 452 (portions where the cooling water L is accumulated). Pass periodically. For this reason, the two water-absorbing materials 453 heated in the circulation of the right portion → the upper portion → the left portion can be cooled with the cooling water L in the lower portion and then sent out to the right portion again. That is, the two water-absorbing materials 453 can cool the two axial seal interfaces SA and the radial seal interface SB all over the circumference.

  Further, as shown in FIG. 7, the two cooling tanks 452 are arranged so as to block the heat transfer path H <b> 2 of the radiant heat from the workpiece W. For this reason, it is possible to suppress the radiant heat from being transmitted to the two axial seal interfaces SA via the heat transfer path H2.

  Further, as shown in FIG. 7, the seal structure 4 of the rotary kiln 1 of the present embodiment includes a refrigerant adjustment unit 46. The refrigerant adjustment unit 46 can adjust the temperature and flow rate of the cooling water L. That is, the temperature of the cooling water L can be lowered by controlling the cooling tower 460. Further, the flow rate of the cooling water L can be increased by controlling the pump 463. For this reason, the two axial seal interfaces SA and the radial seal interface SB can be sufficiently cooled. Therefore, it can suppress that the two axial direction sealing materials 411b and the radial direction sealing material 400b deteriorate with a heat | fever all around. Therefore, the lifetimes of the two axial seal materials 411b and the radial seal material 400b can be extended. As a result, the running cost of the rotary kiln 1 can be reduced. In addition, a member having low heat resistance can be used as a member for forming the two axial seal materials 411b and the radial seal material 400b. For this reason, the freedom degree of member selection becomes high.

  Further, as shown in FIG. 7, according to the seal structure 4 of the rotary kiln 1 of the present embodiment, the cooling water L extends from the refrigerant supply part 450 of the cooling part 45 not in the rotating cylinder part 2 but in the rotation side axial direction. Supplied to the unit 401. That is, the cooling water L is supplied from the radially inner side to the rotation-side axial extending portion 401 that forms the two axial seal interfaces SA. For this reason, the two axial seal interfaces SA and the radial seal interface SB can be sufficiently cooled.

  As shown in FIG. 6, according to the seal structure 4 of the rotary kiln 1 of the present embodiment, when the water absorbing material 453 rotates together with the rotating cylinder portion 2, the water absorbing material 453 passes near the lowermost part of the cooling tank 452. . That is, it passes through the accumulated cooling water L. At this time, the water absorbing material 453 is cooled by the accumulated cooling water L. Further, when the water absorbing material 453 is in a state capable of absorbing the cooling water L (for example, the cooling water L in the water absorbing material 453 is vaporized by heat exchange at the time of circulation, and the water absorbing material 453 reaches the saturated absorption amount. If not, the cooling water L in the cooling tank 452 is absorbed. The water absorbing material 453 rotates with the rotation of the rotating cylinder portion 2.

  As described above, according to the seal structure 4 of the rotary kiln 1 of the present embodiment, the water absorbing material 453 containing the cooling water L is disposed on the outer circumference in the radial direction of the rotating cylinder portion 2 as the rotating cylinder portion 2 rotates. Will be arranged. For this reason, the two axial seal interfaces SA and the radial seal interface SB can be cooled over the entire circumference.

  As shown in FIG. 7, according to the seal structure 4 of the rotary kiln 1 of the present embodiment, the cooling water L contacts the water absorbing material 453 while flowing between the two cooling tanks 452. For this reason, the contact time of the cooling tank 452 and the water absorbing material 453 becomes long. Further, the contact area between the cooling tank 452 and the water absorbing material 453 is increased. Therefore, heat exchange can be performed efficiently.

  Further, the cooling water L circulates through the circulation path C1. For this reason, compared with the case where the cooling water L is disposable, the running cost of the rotary kiln 1 can be reduced. Moreover, since the cooling water L circulates in the circulation path C1, it can suppress that the place (for example, a factory floor, a stand, etc.) where the rotary kiln 1 is arrange | positioned gets wet with the cooling water L.

<Others>
The sealing structure and the rotary kiln according to the present invention have 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.

  The structure of the heat reflecting member 49 is not particularly limited. The cylindrical heat reflecting member 49 may be manufactured by combining a plurality of partial arc-shaped pieces. Alternatively, the tubular heat reflecting member 49 may be produced by winding a belt-shaped metal plate around the outer peripheral surface of the rotating tube portion 2 in an annular shape or a spiral shape. Moreover, you may produce the heat | fever reflection member 49 with metal foil (for example, aluminum foil, gold foil, silver foil, platinum foil, etc.). Alternatively, the heat reflecting member 49 may be produced by applying a paint containing metal (for example, a gold solution, a silver solution, a platinum solution, a palladium solution, or the like) to the outer peripheral surface of the rotating cylinder portion 2. Further, the heat reflecting member 49 may be produced by vapor-depositing a metal on the outer peripheral surface of the rotating cylinder portion 2.

  Further, instead of the heat reflecting member 49, a heat absorbing portion may be arranged. As the heat absorbing portion, for example, a black carbon heat absorbing member may be disposed on the outer peripheral surface of the rotating cylinder portion 2. Moreover, you may arrange | position the heat-absorbing member made from a ceramic on the outer peripheral surface of the rotating cylinder part 2 by methods, such as thermal spraying, as a heat absorption part. When the heat absorbing member and the cooling parts 45 and 47 are used in combination, the heat absorbing member heated by the absorption of radiant heat can be cooled by the cooling parts 45 and 47. Further, the heat shield portion may be disposed on the inner peripheral surface of the rotating cylinder portion 2. Further, a gap may be defined between the heat shield part and the outer peripheral surface of the rotating cylinder part 2.

  Moreover, the transparency of the rotating cylinder part 2 is not particularly limited. It suffices if it can be visually recognized from the outside of the rotating cylinder portion 2 that the workpiece W flows through the side peripheral wall and flows inside the rotating cylinder portion 2. Moreover, the rotating cylinder part 2 may be colored and transparent or translucent.

The kind of atmospheric gas G4 is not specifically limited. An inert gas, an oxidizing gas, a reducing gas, or the like may be used. Specifically, N ₂ , He, Ar, CO, H ₂ or the like may be used. The radial cross-sectional shape of the rotating cylinder part 2 is not particularly limited. Of course, the shape may be a polygonal shape (for example, a triangular shape, a quadrangular shape, a pentagonal shape, or a hexagonal shape).

  The kind of rotary kiln 1 is not specifically limited. As shown in FIG. 1, in addition to an external heating type rotary kiln that heats the heat treatment chamber 210 from the outside of the rotating cylinder portion 2, an internal heating rotary kiln that heats the heat treatment chamber 210 from the inside of the rotating cylinder portion 2 may be used. The heat source of the heating device 5 is not particularly limited. An electric heater, a burner, or the like may be used.

  The material of the axial direction sealing material 411b and the radial direction sealing material 400b is not specifically limited. For example, a silicon system, a fluororesin system, a graphite system, or the like can be used. The number of arrangement of the axial direction sealing material 411b and the radial direction sealing material 400b is not particularly limited. Further, the number of arrangement of the axial seal interface SA and the radial seal interface SB is not particularly limited.

  As shown in FIG. 4, in the above embodiment, the axial seal material 411 b is disposed in the fixed-side axial extension portion 411. However, you may arrange | position the axial direction sealing material 411b in the rotation side axial direction extension part 401. FIG. Moreover, you may arrange | position the some axial direction sealing material 411b separately in the fixed side axial direction extension part 411 and the rotation side axial direction extension part 401. FIG.

  As shown in FIG. 4, in the said embodiment, the radial direction sealing material 400b was arrange | positioned in the rotation side radial direction extension part 400. As shown in FIG. However, the radial sealing material 400b may be disposed in the fixed-side radial extending portion 410. Moreover, you may arrange | position the some radial direction sealing material 400b in the rotation side radial direction extension part 400, and the fixed side radial direction extension part 410 separately.

  In the first embodiment, air G2 is used as the gas. However, the type of gas is not particularly limited. For example, an inert gas, an oxidizing gas, a reducing gas, or the like may be used.

  In the second embodiment, the cooling water L is used as the liquid. However, the type of liquid is not particularly limited. For example, pure water, oil, coolant, industrial water, etc. may be used. Further, the type of the water absorbing material 453 is not particularly limited. What is necessary is just to be able to contain a liquid. For example, a foamed material such as sponge, a porous material such as ceramic, a ceramic fiber, a water-absorbing polymer, or the like can be used.

  As shown in FIG. 7, in the second embodiment, the cooling tower 460 and the pump 463 are controlled by the control unit 464. However, the cooling tower 460 or the pump 463 may be controlled by the control unit 464. That is, the temperature or flow rate of the cooling water L may be controlled alternatively. In the second embodiment, the cooling tower 460 is used as a heat exchanger. However, the type of heat exchanger is not particularly limited. For example, a cooler or the like can be used.

  The kind of the cooling units 45 and 47 is not particularly limited. Either water cooling type or air cooling type may be used. For example, the heat reflecting member 49, the axial seal interface SA, and the radial seal interface SB may be cooled by wetting the outer peripheral surface of the heat reflecting member 49 with water. The cooling units 45 and 47 may not be arranged.

1: Rotary kiln.
2: rotating cylinder, 2f: opening, 2r: opening, 200: tire, 210: heat treatment chamber.
3: Supply device, 30: Supply hopper, 31: Screw feeder.
4: seal structure, 40: rotating flange portion, 400: rotating side radially extending portion, 400a: extending portion main body, 400b: radial sealing material, 401: rotating side axial extending portion, 41: fixed flange portion 410: fixed side radially extending portion, 411: fixed side axial extending portion, 411a: extending portion main body, 411b: axial direction sealing material, 42: flexible tube, 43: cover member, 44: discharge tube, 45: Cooling unit, 450: Refrigerant supply unit, 451: Partition wall, 452: Cooling tank, 453: Water absorbing material, 454: Partition wall, 455: Refrigerant discharge unit, 46: Refrigerant adjustment unit, 460: Cooling tower, 461: Flow rate 462: Thermocouple, 463: Pump, 464: Control unit, 465: Level meter, 47: Cooling unit, 470: Cooling unit body, 471: Refrigerant supply unit, 48: Refrigerant adjustment unit, 480: Compressor 481: vortex tube, 49: heat reflecting member.
5: heating device, 50: outer wall, 51: heat insulation wall, 52: heater.
60: Tire receiving device, 95: Valve, 96: Rotary valve.
A: central axis, C1: circulation path, C2: flow path, G1 to G3: air, G4: atmospheric gas, H1: heat transfer path, H2: heat transfer path, L: cooling water, SA: axial seal interface ( Seal interface), SB: radial seal interface, W: workpiece.

Claims (4)

A rotary kiln seal structure comprising a transparent rotating cylinder portion having a heat treatment chamber inside which is rotatable around its own axis and heat-treats a workpiece flowing in the axial direction,
A rotating-side radial extending portion that protrudes radially outward from the outer peripheral surface of the rotating cylinder portion, and an annular rotating-side axial extending portion that extends in the axial direction from the rotating-side radial extending portion, A rotating flange portion having,
An annular fixed-side axial extension that is arranged on the radially outer side of the rotary-side axially extending part, independently of the rotary cylinder part, and forms an annular seal interface with the rotary-side axially extended part. A fixed flange portion having an existing portion;
A heat shield that is inserted between the rotating cylinder part and the rotating side axially extending part and suppresses radiant heat generated from the workpiece in the rotating cylinder part from being transmitted to the rotating side axially extending part. And
With
The heat shield part is made of metal, and is a heat reflecting member disposed on the outer peripheral surface of the rotary cylinder part.   The rotary kiln seal structure according to claim 1, wherein a gap is defined between the heat reflecting member and the rotation-side axially extending portion. Seal structure of the rotary kiln according to claim 1 or claim 2 comprising a cooling unit for cooling the seal interface.   A rotary kiln comprising the rotary kiln seal structure according to any one of claims 1 to 3.

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