JP2017172888A - Heat treatment device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method to simultaneously improve heat transfer performance from an outer cylinder pipe to an inner cylinder pipe and torque transmission in a double cylinder structure in which the inner cylinder pipe and the outer cylinder pipe are partially kept into contact with each other in a circumferential direction, in a heat treatment device performing heat treatment on a powder or granular charged material while transferring the same by rotating motion.SOLUTION: A heat treatment device A for powder or granular material, includes a rotatable inner cylinder pipe 11 connected to a supply port of a charged material B, an external heat-type outer cylinder pipe 12 rotatably provided on a rotation center 12a not agreed with a rotation center 11a of the inner cylinder pipe 11, a spatial portion 13 disposed between the inner cylinder pipe 11 and the outer cylinder pipe 12 excluding a part of them in a circumferential direction, and a heat transfer portion 14 and a rotation transmitting portion 15 disposed on a contact region of a part in a circumferential direction of an outer peripheral face 11b of the inner cylinder pipe 11 and a part in a circumferential direction of an inner peripheral face 12b of the outer cylinder pipe 12.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat treatment apparatus used for heat treatment (heat treatment) while transferring a charged material such as powder or powder.

Conventionally, as this kind of heat treatment equipment, it has been equipped with a cylindrical core tube that transfers ceramic raw material along with its own rotating operation, and this core tube heat-resistant the inner cylinder made of high-purity and high-density ceramic material. There is a ceramic calciner having a structure inserted in an outer cylinder made of a conductive metal (see, for example, Patent Document 1).
A gap formed in the diametrical direction between the inner cylinder and the outer cylinder is filled with an amorphous heat insulating material such as a ceramic fiber blanket, and the inner cylinder and the outer cylinder are integrally rotated. .
A heater is disposed inside the furnace body that is disposed around the outer periphery of the core tube, and the ceramic raw material charged into the core tube is heated by the heater while being transferred by the rotation of the core tube itself. It is calcined. As a result, the reaction between the heavy metal vapor generated by calcination of the ceramic raw material and the inner cylinder is sufficiently suppressed.

JP-A-06-003054

However, in such a conventional heat treatment apparatus, since the inner cylinder and the outer cylinder are integrated by filling the gap between the inner cylinder and the outer cylinder, which are the core tube, with the heater, the outer cylinder is heated by the heater. Even so, the heat transmitted to the inner cylinder is limited only to convection and radiation. As a result, there is a problem that heat from the heater is not easily transmitted to the inner cylinder and is inferior in thermal efficiency for calcining the ceramic raw material.
In addition, in order to efficiently transmit the rotational force of the outer cylinder to the inner cylinder in order to realize the rotation operation of the reactor core tube itself, a uniform heat insulating material is packed in the gap between the inner cylinder and the outer cylinder at a high density to achieve complete integration. It is necessary to create a structured structure. However, in this case, the higher the density of the amorphous heat insulating material, the more difficult the heat of the heater is transferred from the outer cylinder to the inner cylinder, and the efficiency of the heat treatment decreases.
In order to solve this problem, if the density of the amorphous heat insulating material packed in the gap between the inner cylinder and the outer cylinder is reduced, the frictional resistance between the inner cylinder and the outer cylinder is also reduced. There is a problem that the rotating force of the outer cylinder cannot be efficiently transmitted to the inner cylinder.
That is, the heat transfer from the outer cylinder to the inner cylinder and the transmission of the rotational force are contradictory and cannot be achieved with high efficiency.

  In order to achieve such a problem, a heat treatment apparatus according to the present invention is a heat treatment apparatus for heat-treating a powdered or powdered charge while being transferred by a rotating operation, and is in communication with the charge supply port. Between the inner cylinder pipe and the outer cylinder pipe, and an outer heat-type outer cylinder pipe rotatably provided at a rotation center that does not coincide with the rotation center of the inner cylinder pipe, Are provided at a contact portion of a space portion provided excluding a part in the circumferential direction of the two, a part in the circumferential direction of the outer peripheral surface of the inner cylindrical tube, and a part of the circumferential direction of the inner peripheral surface of the outer cylindrical tube. A heat transfer section and a rotation transmission section are provided.

It is explanatory drawing which shows the whole structure of the heat processing apparatus which concerns on embodiment of this invention, (a) is a longitudinal front view, (b) is an expansion longitudinal section along the (1B)-(1B) line | wire of Fig.1 (a). It is a side view. It is explanatory drawing which shows the modification of the heat processing apparatus which concerns on embodiment of this invention, (a) is a longitudinal front view, (b) is an expansion longitudinal section along the (2B)-(2B) line | wire of Fig.1 (a). It is a side view. It is explanatory drawing which shows the modification of the heat processing apparatus which concerns on embodiment of this invention, (a) is a longitudinal front view, (b) is an expansion longitudinal section along the (3B)-(3B) line | wire of Fig.1 (a). It is a side view.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
As shown in FIGS. 1 to 3, the heat treatment apparatus A according to the embodiment of the present invention transfers the charge B supplied into the core tube 10 to the downstream side by the rotation operation of the core tube 10. A heat treatment (heat treatment) is performed by the outer heating unit 20 and discharged. The charge B is made of powder or granular material, such as barium titanate dielectric material, lead zirconate titanate piezoelectric material, lithium battery material, thin display panel phosphor, etc. Body material is included.
More specifically, the core tube 10 of the heat treatment apparatus A according to the embodiment of the present invention includes an inner tube 11 that is rotatably connected to the supply port 31 of the charge B, and a rotation center of the inner tube 11. An outer-heated outer tube 12 that is rotatably provided at a rotation center 12a that does not coincide with 11a, and a space 13 that is provided between the inner tube 11 and the outer tube 12 except for a part in the circumferential direction thereof. The heat transfer part 14 provided at the contact portion of the circumferential portion of the outer peripheral surface 11b of the inner cylindrical tube 11 and the circumferential portion of the inner peripheral surface 12b of the outer cylindrical tube 12, and the outer peripheral surface 11b of the inner cylindrical tube 11 The rotation transmission part 15 provided in the contact part of the circumferential direction part and the circumferential direction part of the internal peripheral surface 12b of the outer cylinder pipe 12 is provided as a main component.

The inner cylindrical tube 11 is formed in a cylindrical shape with a material containing a heat-resistant non-metal such as ceramic (ceramics) mainly composed of alumina or carbon whose at least the inner peripheral surface 11c or the whole is excellent in heat resistance, for example. It is arranged to be rotatable around the center. For this reason, the charge B during the heat treatment is prevented from coming into contact with the hot metal surface.
An inlet portion 11 d is formed at one axial end of the inner tube 11 and communicates with the supply port 31 for the charge B. An outlet portion 11e is formed on the other end side in the axial direction which is the downstream side in the transfer direction of the charge B in the inner tube 11 and communicates with the discharge port 32 of the charge B.
For this reason, the inner tube 11 is rotated around the axis thereof, while a certain amount of the charge B supplied from the supply port 31 to the inlet 11d flows toward the outlet 11e, while the outer tube 12 It is configured to be heated by conduction heat from and discharged from the outlet portion 11e to the discharge port 32.

The outer tube 12 as a whole is excellent in heat resistance and superior in strength than heat-resistant nonmetals such as ceramic and carbon. For example, nickel-based alloys such as Inconel (registered trademark), cobalt-based alloys, chromium-based alloys, etc. It is formed in a cylindrical shape having an inner diameter that is larger than the outer diameter of the inner tube 11.
The outer cylinder tube 12 is supported in a double cylinder shape surrounding the outer side of the inner cylinder tube 11 so as to be rotatable about its axis, and the rotation center 12 a of the outer cylinder tube 12 coincides with the rotation center 11 a of the inner cylinder tube 11. Are arranged separately without.
Furthermore, a part of the outer tube 12 is linked to a rotation drive unit (not shown) such as a motor via a transmission member (not shown) such as a chain. By the operation of the rotation driving unit, the outer tube 12 is configured to rotate and move continuously or intermittently around the axis.

Moreover, the outer cylinder pipe | tube 12 is arrange | positioned so that the charging part 20 in the inner cylinder pipe | tube 11 may be heated via the outer cylinder pipe | tube 12 with the heating part 20 from the outer side.
The heating unit 20 preferably has a heating atmosphere 21 provided so as to cover the outside of the outer tube 12 and a heat source (not shown) provided in the heating atmosphere 21.
The heating atmosphere 21 is formed in a cylindrical shape or a similar cylindrical shape so as to be surrounded by the furnace wall 22 outside the outer cylindrical tube 12.
As a heat source used for the heating unit 20, an electrical device such as a heater or a device other than electricity such as a gas burner is used. In the case where the charge B made of a powder or granular material is heat-treated at a firing temperature of about 850 to 1000 ° C. inside the inner tube 11, the heating atmosphere 21 and the outer tube 12 are set to 1000 ° C. or more. Heating.

As specific examples of the inner tube 11 and the outer tube 12, in the example shown in FIGS. 1A, 1B and 3A, 3B, the entire inner tube 11 is made of ceramic and is long. The outer tube 12 is formed of a nickel-base alloy into a long integrated tube.
The inner cylinder pipe 11 and the outer cylinder pipe 12 are respectively inclined from the inlet portion 11d of the inner cylinder pipe 11 by tilting the rotation center 11a and the rotation center 12a, which are the respective axis lines, at an appropriate angle θ with respect to the installation floor surface F. Also, the outlet portion 11e is installed so as to be lower. As a result, the charge B supplied from the supply port 31 to the inlet portion 11d is slid while swinging toward the outlet portion 11e by the rotation of the inner tube 11, while the conduction heat from the heating unit 20 is transferred. It is heated with.
More specifically, the charge B is lifted in the circumferential direction associated with the rotation of the inner tube 11, and slipped down in the circumferential direction opposite to the weight of the charge B and to the lower direction in the inclination direction of the core tube 1. Are repeated alternately. For this reason, the charge B slides and moves downstream along the inner peripheral surface 11c of the inner tube 11 while swinging in the circumferential direction.
Although not shown in the drawings as other examples, either the inner tube 11 or the inner tube 11 or both the inner tube 11 and the outer tube 12 are formed from a single tube type, and are divided into a plurality of short shapes. It is also possible to change to the short divided connection type in which the tubes are connected to each other and integrated. In particular, when the inner tube 11 is changed to a short connection type, even a heat-resistant nonmetal such as ceramic can be easily increased in size (increased in diameter and lengthened).

A gas introduction port 33 for supplying a gas such as an inert gas or hot air toward the outlet portion 11 e of the inner tube 11 is provided on the other axial end of the inner tube 11 and the outer tube 12. Thereby, while preventing the oxidation of the charge B, harmful exhaust gas generated from the charge B by the heat treatment is discharged from the exhaust port 34 provided on one end side in the axial direction of the inner tube 11 and the outer tube 12. The exhaust pipe is configured to be exhausted to the outside of the inner tube 11 and the outer tube 12. That is, an exhaust line 34 a for passing exhaust gas is formed between the inlet portion 11 d of the inner tube 11 and the tubular supply port 31.
Further, in the case of the illustrated example as a specific example of the heating unit 20, only the intermediate portion in the axial direction of the outer tube 12 is covered with the cylindrical heating atmosphere 21 and heated indirectly.
Although not shown in the drawings as other examples, the heating atmosphere 21 is used instead of direct heating with a heat source, the entire axial direction of the outer tube 12 is heated indirectly with the heating atmosphere 21, or the outer tube 12 It is also possible to change, for example, directly heating the entire axial direction with a heat source.

The arrangement (attachment position) of the inner cylindrical tube 11 with respect to the outer cylindrical tube 12 is such that a part of the outer circumferential surface 11b of the inner cylindrical tube 11 extends in the axial direction and an axial direction of the inner circumferential surface 12b of the outer cylindrical tube 12. And a part in the circumferential direction extending to each other are brought into contact with each other by gravity or support means.
In particular, a part of the outer peripheral surface 11b of the inner cylindrical tube 11 that extends substantially over the entire axial direction and a part of the inner peripheral surface 12b of the outer cylindrical tube 12 that extends substantially over the entire axial direction. The parts are preferably brought into contact with each other.
The “substantially the entire axial direction” here is not limited to the total axial length of the inner cylindrical tube 11 and the outer cylindrical tube 12, and in addition to this, the axial end portions of the inner cylindrical tube 11 and the outer cylindrical tube 12 are defined. Excluding the overall length.
By such contact between the inner tube 11 and the outer tube 12, the inner tube 11 is supported so as to be free to rotate with respect to the outer tube 12. A space portion 13 is partially formed between the inner tube 11 and the outer tube 12 except for the contact portion between the inner tube 11 and the outer tube 12.

The space portion 13 includes a radial gap 13 a formed in the radial direction of the inner cylindrical pipe 11 and the outer cylindrical pipe 12, and an axial gap 13 b formed in the axial direction of the inner cylindrical pipe 11 and the outer cylindrical pipe 12. .
The radial gap 13 a is formed between the outer peripheral surface 11 b of the inner cylindrical tube 11 and the inner peripheral surface 12 b of the outer cylindrical tube 12 in a non-cylindrical shape that is divided at a contact portion between the inner cylindrical tube 11 and the outer cylindrical tube 12. The The outer diameter of the inner tube 11 and the inner diameter of the outer tube 12 that specify the radial gap 13a are different from each other in the radial direction due to the difference in the coefficient of thermal expansion (thermal expansion coefficient) of the constituent materials of the inner tube 11 and the outer tube 12. Even if a difference in expansion / contraction due to thermal deformation (expansion / contraction) occurs, the radial gap 13a between them is set so as not to disappear.
The axial gap 13 b is formed in a cylindrical shape between the axial end of the inner tube 11 and the axial end of the outer tube 12. The axial lengths of the inner cylindrical tube 11 and the outer cylindrical tube 12 that specify the axial gap 13b depend on the difference in the thermal expansion coefficient (thermal expansion coefficient) of the constituent materials of the inner cylindrical tube 11 and the outer cylindrical tube 12 in the axial direction. Even if a difference in expansion / contraction due to heat deformation (expansion / contraction) occurs, the axial gap 13b between the two is not set to disappear in the attached state.
As a specific example of the radial gap 13a and the axial gap 13b, when the coefficient of thermal expansion of the constituent material of the outer cylindrical tube 12 is larger than the coefficient of thermal expansion of the constituent material of the inner cylindrical tube 11, the heat treatment of the charge B Even if the outer tube 12 is cooled and contracted later, the outer tube 11 is set so as not to contact the outer peripheral surface 11b of the inner tube 11 in the radial direction and the axial direction.

As an example of the arrangement of the inner tube 11 with respect to the outer tube 12, in the example shown in FIGS. 1A, 1B and 3A, 3B, the circumference of the outer peripheral surface 11b of the inner tube 11 is shown. A long part over substantially the whole axial direction in a part of the direction and a long part over almost the whole axial direction in a part of the inner peripheral surface 12b of the outer tube 12 are brought into contact with each other by gravity.
More specifically, by placing the inner tube 11 inside the outer tube 12, the circumferential portion (bottom) of the outer peripheral surface 11b of the inner tube 11 is caused by the weight of the inner tube 11 so that the outer tube 11 The pipe 12 is in contact with a part (bottom part) of the inner circumferential surface 12 b in the circumferential direction.
A non-cylindrical radial gap 13a is defined as a space 13 in most of the circumferential direction excluding the contact parts (bottom parts).
Further, an annular axial gap 13 b is formed as a space 13 on the upper axial end side of the inclined inner cylinder tube 11 and outer cylinder tube 12. For this reason, even if a difference in expansion and contraction due to thermal deformation (expansion / contraction) occurs in the axial direction due to the difference in thermal expansion coefficient between the constituent materials of the inner cylinder pipe 11 and the outer cylinder pipe 12, the inner cylinder pipe is formed in the axial gap 13b. 11 and the expansion / contraction difference of the outer tube 12 can be sufficiently absorbed.
Although not shown in the drawings as another example, a part of the outer circumferential surface 11b of the inner cylinder tube 11 in the circumferential direction (predetermined part other than the bottom) is formed by suspending the inner cylinder pipe 11 inside the outer cylinder pipe 12. It is also possible to change so as to come into contact with a part of the inner peripheral surface 12b of the outer tube 12 in the circumferential direction (a predetermined part other than the bottom). In the inclined inner cylinder tube 11 and outer cylinder tube 12, it is also possible to partition the axial gap 13b on the lower axial other end side.

A heat transfer section 14 and a rotation transmission section 15 are formed at the contact portion between the inner tube 11 and the outer tube 12.
The heat transfer part 14 passes through a contact portion between a part in the circumferential direction of the outer peripheral surface 11b of the inner cylindrical pipe 11 and a part in the circumferential direction of the inner peripheral surface 12b of the outer cylindrical pipe 12 and heats the outer cylindrical pipe 12. This is a heat conduction mechanism that transmits to the inner tube 11. For this reason, it is preferable to set the area of the contact portion, that is, the contact area of the inner tube 11 to the outer tube 12 as wide as possible.
As a specific example of the heat transfer section 14, in the case of the example shown in FIGS. 1A, 1 </ b> B to 3 </ b> A, 3 </ b> B, in a part in the circumferential direction of the inner peripheral surface 12 b of the outer tube 12. A linear heat transfer section 14 is formed across the contact portion that extends over substantially the entire axial direction and the contact portion that extends over substantially the entire axial direction in a portion of the outer peripheral surface 11 b of the inner tube 11.
Although not shown in the drawings as another example, a part of the contact portion in the axial direction in a part of the inner peripheral surface 12b of the outer cylindrical tube 12 and a part of the peripheral direction of the outer peripheral surface 11b of the inner cylindrical tube 11 in the axial direction It is also possible to form the heat transfer section 14 over a part of the contact portion.

The rotation transmission portion 15 is a rotation of the outer cylindrical tube 12 by utilizing a contact portion between a part of the outer peripheral surface 11b of the inner cylindrical tube 11 in the circumferential direction and a part of the inner peripheral surface 12b of the outer cylindrical tube 12 in the circumferential direction. This is a power transmission mechanism that transmits force to the inner tube 11.
Examples of the rotation transmission from the outer cylindrical tube 12 to the inner cylindrical tube 11 by the rotation transmission unit 15 include oscillation transmission due to sliding friction, constant-speed continuous rotation transmission, and intermittent vibration generation transmission.

As shown in FIGS. 1 (a) and 1 (b), the swing transmission due to sliding friction is a part of the outer peripheral surface 11 b of the inner tube 11 and a part of the inner surface 12 b of the outer tube 12. The sliding friction part 15a is provided as the rotational transmission part 15 in the contact part.
The sliding friction portion 15 a is configured to rotate (forward) the inner tube 11 in conjunction with continuous rotation (forward) of the outer tube 12, and move the weight of the charge B accompanying the rotation of the inner tube 11. Thus, it is configured to repeat the reverse rotation (inversion) movement in which the inner tube 11 slides in the reverse direction. Thereby, the inner tube 11 is swung in a predetermined angle region. The swinging of the inner tube 11 due to the forward rotation and the reverse rotation does not necessarily require regularity or periodicity. The striking vibration for preventing adhesion of the charge B by the striking mechanism 30 described later, and the inner tube If any of the effects of reducing the thickness of the deposit in 11 is obtained, irregular and irregular oscillation may be used.
More specifically, first, due to the frictional resistance generated in the sliding friction portion 15a, the inner tube 11 is rotated forward in the same direction in conjunction with continuous forward rotation in one direction of the outer tube 12. Along with this, the charge B is lifted in the circumferential direction (forward rotation direction) by the frictional resistance generated between the inner cylindrical tube 11 and the inner peripheral surface 11c. Next, when the charge B is lifted to a predetermined angular position in the circumferential direction along with the forward rotation of the inner tube 11, the outer peripheral surface 11 b of the inner tube 11 is removed by the weight movement of the charge B. The inner tube 11 starts to reverse in the reverse direction in the circumferential direction by sliding with respect to the inner peripheral surface 12b of the tube 12. Thereafter, when the central portion of the charge B reaches a vertical position, the reverse sliding movement of the inner tube 11 stops. Thereafter, the above-described operation is repeated. For this reason, even if the outer tube 12 is continuously forward rotated in one direction, the inner tube 11 is oscillated by alternately repeating forward rotation and reverse movement over a predetermined angle region.
In the illustrated example, a contact portion that extends over substantially the entire axial direction in a part of the inner peripheral surface 12b of the outer tube 12 and a contact that covers substantially the entire axial direction of a portion of the outer surface 11b of the inner tube 11 in the circumferential direction. A linear sliding friction part 15a is formed over the part.
Further, the sliding friction portion 15a swings the charging material B by swinging the charging tube B over a predetermined angle region in addition to the rocking motion of the charging material B accompanying the rotation of the inner cylindrical tube 11. In order to further increase the width, it is preferable to set the gap with the outer tube 12 so that the inner tube 11 can move easily.
In this case, it is expected that the flow movement of the charge B toward the downstream side is promoted, and at the same time, the thickness of the charge B from the heating bottom surface side to the surface layer B1 is made shallow. As a result, it is possible to realize both transfer promotion and heating uniformity of the charge B with a simple structure, and the charge B can be subjected to high-quality heat treatment at low cost.

As shown in FIGS. 2A and 2B, constant rotation transmission at a constant speed is a part of the outer peripheral surface 11b of the inner tube 11 and a part of the inner surface 12b of the outer tube 12 in the peripheral direction. In the contact area with the rotation transmission section 15, an uneven portion 15 b is provided.
The uneven portion 15b is formed in an uneven shape in which a portion of the outer peripheral surface 11b of the inner tube 11 and a portion of the inner surface 12b of the outer tube 12 are engaged with each other in the circumferential direction. 12, the rotation of the inner tube 11 is restricted. Thus, the inner cylinder tube 11 is configured to continuously and smoothly rotate in the same direction in conjunction with the continuous rotation of the outer cylinder tube 12.
In the illustrated example, an outer gear serving as a concavo-convex portion 15b is provided around the outer peripheral surface 11b of the inner tube 11 at the lower axial other end portion of the inclined inner tube 11 and outer tube 12, An internal gear serving as a concavo-convex portion 15 b is provided around the inner peripheral surface 12 b of the outer tube 12.
Further, although not shown as another example, it is possible to use transmission parts other than gears as the uneven portion 15b.

As shown in FIGS. 3 (a) and 3 (b), intermittent vibration generation and transmission is performed on a part of the outer peripheral surface 11b of the inner tube 11 and a part of the inner surface 12b of the outer tube 12 in the peripheral direction. A polygonal fitting part 15c is provided as the rotational transmission part 15 at the contact part.
The polygonal fitting portion 15c is a regular polygonal concavo-convex shape in which a part of the outer peripheral surface 11b of the inner tube 11 and a part of the inner surface 12b of the outer tube 12 are engaged in the circumferential direction. Formed. As a result, the inner tube 11 is rotated in the same direction in conjunction with the continuous rotation of the outer tube 12, and the vibration is generated intermittently.
In the illustrated example, the regular polygonal convexity that forms the polygonal fitting portion 15c on the outer peripheral surface 11b of the inner tube 11 at the lower axial other end portion of the inclined inner tube 11 and outer tube 12 is shown. The regular polygonal recessed part used as the polygonal fitting part 15c is provided in the inner peripheral surface 12b of the outer cylinder pipe 12 around the part.
Although not shown as another example, the uneven shape of the polygonal engagement portion 15c can be changed to a shape other than the illustrated example in which the regular polygon has a different number of corners.

On the other hand, as shown in FIG. 1B, FIG. 2B, and FIG. 3B, a striking mechanism 30 is provided on the outer side of the outer cylindrical tube 12, and the inner peripheral surface 11c of the inner cylindrical tube 11 is provided. It is preferable to drop the charge B made of a powdery body or a granular material adhering to the surface by impact vibration.
The striking mechanism 30 includes a striking portion 31 that comes into contact with the outer surface 12 c of the outer tube 12, and a striking vibration generator 33 that reciprocates the striking portion 4 a toward the outer surface 12 c of the outer tube 12. By hitting the tip of the striking portion 31 against the outer surface 12c of the outer tube 12 by the operation of the hammering vibration generator 33, the hammering vibration generated in the outer tube 12 is propagated through the contact portion with the inner tube 11, The inner tube 11 is configured to vibrate directly.
In the case of the illustrated example, the striking part 31 penetrates the furnace wall 22 of the heating part 20 and is supported so as to reciprocate, and the striking vibration generator 33 is formed in a low-temperature atmosphere formed with the heating atmosphere 21 and the furnace wall 22 interposed therebetween. Is arranged. In the striking mechanism 30, at least the striking portions 31 are arranged at predetermined intervals in the axial direction of the outer cylindrical tube 12, and generate striking vibrations over the entire axial length of the outer cylindrical tube 12.
Although not shown as another example, the striking mechanism 30 can be changed to a structure other than the illustrated example.

According to such a heat treatment apparatus A according to the embodiment of the present invention, a part in the circumferential direction of the outer peripheral surface 11b of the inner tube 11 and a part in the circumferential direction of the inner surface 12b of the outer tube 12 are brought into contact with each other. The heat of the outer tube 12 heated in the heating atmosphere 21 is transmitted to the inner tube 11 by the heat transfer section 14 provided at the contact portion.
At the same time, the rotational force of the outer tube 12 is transmitted to the inner tube 11 by the rotation transmission portion 15 provided at the contact portion.
Therefore, the charge B supplied from the supply port 31 to the inside of the inner tube 11 is smoothly transferred to the downstream side by the rotational transmission from the outer tube 12 to the inner tube 11, and at the same time, the outer tube Charge B is quickly heat-treated by the conduction heat from 12 to the inner tube 11.
Therefore, it is possible to simultaneously improve the heat transfer from the outer tube 12 to the inner tube 11 and the transmission of the rotational force with a double tube structure in which parts of the inner tube 11 and the outer tube 12 are partially in contact with each other in the circumferential direction. it can.
As a result, heat transfer and rotational force from the outer tube 12 to the inner tube 11 compared to the conventional one in which the inner tube and the outer tube are integrated by filling the gap between the inner tube and the outer tube with an amorphous heat insulating material. Both can be achieved with high efficiency. For this reason, heat energy can be reduced and heat treatment time can be shortened, and high-quality heat treatment can be realized efficiently and inexpensively with a simple structure.

Further, between the outer peripheral surface 11b of the inner cylindrical tube 11 and the inner peripheral surface 12b of the outer cylindrical tube 12, the space portion 13 can be formed larger in the radial direction except for a part in the circumferential direction thereof.
For this reason, even if a difference in expansion and contraction due to thermal deformation (expansion / contraction) occurs in the radial direction due to the difference in thermal expansion coefficient between the constituent materials of the inner tube 11 and the outer tube 12, the inner tube 11 in the space 13. And the expansion-contraction difference of the outer cylinder pipe 12 can fully be absorbed.
Therefore, even if the outer cylindrical tube 12 excellent in hardness after the heat treatment of the charge B is cooled and contracted first, damage to the inner cylindrical tube 11 inferior in hardness can be prevented.
As a result, the inner tube 11 having inferior hardness can be used for a long period of time, and is excellent in maintainability and economy.

In particular, a part of the outer peripheral surface 11b of the inner cylindrical tube 11 that extends substantially over the entire axial direction and a part of the inner peripheral surface 12b of the outer cylindrical tube 12 that extends substantially over the entire axial direction. The parts are preferably brought into contact with each other.
In this case, it is not necessary to positively consider the self-weight deflection in the long structure of the inner tube 11.
For this reason, the freedom degree in structural design, such as material selection of the inner cylinder pipe 11, and a short division | segmentation connection, improves.
Therefore, the design restriction of the inner tube 11 associated with the lengthening and enlargement of the core tube 10 is reduced, and the required strength of the inner tube 11 can be reduced.
As a result, the structure of the inner tube 11 can be simplified, and the manufacturing cost can be reduced.

Furthermore, it is preferable that a part in the circumferential direction of the outer peripheral surface 11b of the inner tube 11 and a part in the circumferential direction of the inner surface 12b of the outer tube 12 are brought into contact with each other by gravity.
In this case, only the outer peripheral surface 11b of the inner cylindrical tube 11 is placed on the inner peripheral surface 12b of the outer cylindrical tube 12, and the assembly of both is completed without requiring a jig or a support.
Therefore, the inner tube 11 can be assembled to the outer tube 12 with a simple structure.
As a result, further simplification of the structure can be realized, and further improvement in maintainability and economy can be achieved.

Moreover, the rotation transmission part 15 mutually engages in the circumferential direction at the contact part of the circumferential direction part of the outer peripheral surface 11b of the inner cylinder pipe 11, and the circumferential direction part of the inner peripheral surface 12b of the outer cylinder pipe 12. It is preferable to have the uneven part 15b.
In this case, the inner tube 11 continuously rotates and moves in the same direction in conjunction with the continuous rotation of the outer tube 12.
Therefore, the rotational force can be smoothly and reliably transmitted from the outer tube 12 to the inner tube 11 with a simple structure.
As a result, thermal energy can be reduced and heat treatment time can be further shortened, and high-quality heat treatment can be realized more efficiently and inexpensively.

Moreover, the rotation transmission part 15 mutually engages in the circumferential direction at the contact part of the circumferential direction part of the outer peripheral surface 11b of the inner cylinder pipe 11, and the circumferential direction part of the inner peripheral surface 12b of the outer cylinder pipe 12. It is preferable to have a polygonal fitting portion 15c.
In this case, each time the corner portions of the polygonal fitting portion 15c come into contact with each other while the inner tube 11 rotates and moves in the same direction in conjunction with the continuous rotation of the outer tube 12, the inner tube 11 is intermittently applied to the entirety of 11.
Therefore, the vibration propagation property to the inner tube 11 can be improved with a simple structure.
As a result, even if the number of hitting mechanisms 30 for dropping the charge B adhering to the inner peripheral surface 11c of the inner tube 11 is reduced or eliminated, the inner tube 11 is intermittently vibrated. The charge B adhering to the inner peripheral surface 11c can be reliably dropped.
Thereby, the whole structure of the heat processing apparatus A can be simplified and the further improvement of maintainability and economical efficiency can be aimed at.

In the above-described embodiment, the case where the outer tube 12 is continuously rotated by the operation of the rotation drive unit has been described. However, the present invention is not limited to this. By rotating the tube 12 intermittently, the rotation transmission unit 15 may transmit intermittent rotation to the inner tube 11.
Also in this case, the same effect as the example shown in FIGS. 3A and 3B can be obtained.

A Heat treatment apparatus 11 Inner tube 11a Rotation center 11b Outer surface 11c Inner surface 12 Outer tube 12a Rotation center 12b Inner surface 13 Space portion 14 Heat transfer portion 15 Rotation drive portion 15a Friction portion 15b Uneven portion 15c Polygonal fitting Part B Charge 31 Supply port

Claims (5)

A heat treatment device for heat treatment while transferring powdered or powdered charge by rotating operation,
An inner tube that is rotatably connected to the supply port of the charge;
An externally-heated outer tube that is rotatably provided at a rotation center that does not coincide with the rotation center of the inner tube;
A space provided between the inner tube and the outer tube excluding a part of the circumferential direction of both,
A heat transfer portion and a rotation transmission portion provided at a contact portion of a part in the circumferential direction of the outer peripheral surface of the inner cylindrical tube and a part of the outer peripheral tube in the circumferential direction of the inner peripheral surface. Heat treatment equipment.   A long part over substantially the whole axial direction in a part in the circumferential direction of the outer peripheral surface of the inner tube, and a long part over almost the whole axial direction in a part in the circumferential direction of the inner peripheral surface of the outer tube The heat treatment apparatus according to claim 1, wherein the two are in contact with each other.   3. The heat treatment apparatus according to claim 1, wherein a part in the circumferential direction of the outer peripheral surface of the inner cylindrical tube and a part in the circumferential direction of the inner peripheral surface of the outer cylindrical tube are in contact with each other by gravity. .   The rotation transmission part has an uneven part engaged with each other in the circumferential direction at a contact part between a part in the circumferential direction of the outer peripheral surface of the inner cylindrical pipe and a part in the circumferential direction of the inner peripheral surface of the outer cylindrical pipe. The heat treatment apparatus according to claim 1, 2 or 3.   Polygonal fitting in which the rotation transmission portion engages with each other in the circumferential direction at a contact portion between a part in the circumferential direction of the outer peripheral surface of the inner tube and a part in the circumferential direction of the inner surface of the outer tube The heat treatment apparatus according to claim 1, wherein the heat treatment apparatus has a combined portion.

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