JP2019002529A - Heat insulation device - Google Patents

Abstract

To provide a heat insulation device which can prevent damage caused by heat while improving heat insulation performance.SOLUTION: A heat insulation device 1 provided at an outer wall 8 of a heating furnace 7 includes a high temperature side panel 10, a low temperature side panel 20, and a seal member 30. The low temperature side panel 20 is formed separately from the high temperature side panel 10 provided at the outer wall 8 and is provided at the opposite side of the heating furnace 7 when viewed from the high temperature side panel 10 in a state where the low temperature side panel 20 is separated from the high temperature side panel 10. The seal member 30 is provided between the high temperature side panel 10 and the low temperature side panel 20 and can deform in response to relative movement of the high temperature side panel 10 and the low temperature side panel 20. The seal member 30 can maintain air-tightness of a heat insulation chamber 100 which is formed between the high temperature side panel 10 and the low temperature side panel 20 and can be decompressed.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat insulating device that suppresses heat transfer between a high temperature side and a low temperature side.

  2. Description of the Related Art Conventionally, a heat insulating device that has a reduced pressure heat insulating chamber and suppresses heat transfer between a high temperature side and a low temperature side is known. For example, Patent Document 1 describes a heat insulating device including a high temperature side panel provided on the heat source side and a low temperature side panel capable of forming a plurality of heat insulating chambers between the high temperature side panel.

JP 2014-95426 A

  In the heat insulation apparatus described in Patent Document 1, a plurality of independent heat insulation chambers are formed by connecting a high temperature side panel and a low temperature side panel at a constant interval. However, since heat is transferred from the high temperature side panel toward the low temperature side panel due to heat transfer at the connection location, the heat insulation performance indicating the degree of heat transfer from the heat source is reduced when the number of heat insulation chambers is increased. Further, when the number of the heat insulating chambers is reduced, there is a possibility that the heat insulating chamber cannot be kept airtight due to deformation caused by a difference in thermal expansion due to a temperature difference between the high temperature side panel and the low temperature side panel.

  This invention is made | formed in view of said problem, The objective is to provide the heat insulation apparatus which can prevent the failure | damage by heat, improving the heat insulation performance.

The present invention is a heat insulating device that suppresses heat transfer between a high temperature side and a low temperature side, and includes a high temperature side member (10), a low temperature side member (20), and a seal member (30).
The high temperature side member is provided on the high temperature side.
The low temperature side member is formed separately from the high temperature side member, and is provided on the low temperature side in a state of being separated from the high temperature side member.
The seal member is provided between the high temperature side member and the low temperature side member, and can be deformed corresponding to the relative movement between the high temperature side member and the low temperature side member. The sealing member is formed between the high temperature side member and the low temperature side member and can maintain the airtightness of the heat insulating chamber (100) that can be decompressed.

In the heat insulating device of the present invention, since the high temperature side member and the low temperature side member are provided in a state of being separated from each other, the movement of heat due to heat transfer between the high temperature side member and the low temperature side member can be reduced to zero. it can. Thereby, since the heat insulation apparatus of this invention can reduce the heat transfer amount between a high temperature side member and a low temperature side member, it can improve heat insulation performance.
Moreover, in the heat insulation apparatus of this invention, a high temperature side member and a low temperature side member move relatively by the thermal expansion difference resulting from the temperature difference of a high temperature side member and a low temperature side member. Even if there is a relative movement between the high temperature side member and the low temperature side member, the seal member capable of maintaining the air tightness of the heat insulation chamber is deformed following the relative movement, and the heat insulation chamber can be kept airtight. Thereby, the damage by the deformation | transformation resulting from a thermal expansion difference can be prevented compared with the case where a high temperature side member and a low temperature side member are connected directly.
Thus, the heat insulating device of the present invention reduces the amount of heat transfer between the high temperature side member and the low temperature side member by providing the high temperature side member and the low temperature side member apart from each other, and can be deformed. Can prevent damage due to the difference in thermal expansion. Therefore, the heat insulating device of the present invention can prevent breakage due to heat while improving the heat insulating performance.

It is sectional drawing of the heat insulation apparatus by 1st embodiment. It is the II-II sectional view taken on the line of FIG. It is sectional drawing of the heat insulation apparatus by 2nd embodiment. It is sectional drawing of the heat insulation apparatus by 3rd embodiment.

  Hereinafter, a plurality of embodiments of the present invention will be described with reference to the drawings. Note that, in a plurality of embodiments, substantially the same components are denoted by the same reference numerals, and description thereof is omitted.

(First embodiment)
The heat insulation apparatus by 1st embodiment is demonstrated based on FIG. The heat insulating device 1 according to the first embodiment is used in, for example, a heating furnace 7 that performs baking for hardening a resin that seals a winding of a motor, drying of a member, and the like. The heat insulating device 1 includes a high temperature side panel 10 as a “high temperature side member”, a low temperature side panel 20 as a “low temperature side member”, a seal member 30, a sphere 35 as a plurality of “intermediate members”, and a “regulator” The positioning member 37 and the pressing part 40 are provided. The heat insulating device 1 is provided on the outer wall 8 of the heating furnace 7. 1 and 2, a direction substantially perpendicular to the outer wall 8 of the heating furnace 7 is referred to as an “axial direction”, and a direction perpendicular to the axial direction is referred to as a “radial direction”. 1 and 2 describe that the seal member 30, the sphere 35, the positioning member 37, and the pressing portion 40 are relatively large in order to make the configuration of the heat insulating device 1 easy to understand.

  The high temperature side panel 10 is provided so as to cover the outer wall 8 of the heating furnace 7. The high temperature side panel 10 is a member formed in a flat plate shape from a metal having high heat resistance. In the first embodiment, the high temperature side panel 10 is formed in a substantially square shape, and is provided so that one flat surface 101 abuts on the outer wall surface 81.

  The low temperature side panel 20 is provided in a state of being separated from the high temperature side panel 10 on the low temperature side opposite to the outer wall 8 when viewed from the high temperature side panel 10. The low temperature side panel 20 is formed separately from the high temperature side panel 10. The low temperature side panel 20 includes a flat surface portion 21, an outer peripheral protrusion portion 22, an inner peripheral protrusion portion 23, and a passage forming portion 24.

  The flat surface portion 21 is a flat plate-like portion provided to face the high temperature side panel 10. In the first embodiment, the flat portion 21 is formed in a substantially square shape having substantially the same size as the high temperature side panel 10. The flat portion 21 is provided such that one flat surface 211 as the “low temperature side facing surface” faces the other flat surface 102 as the “high temperature side facing surface” of the high temperature side panel 10. The flat surface portion 21 has a communication hole 210 that communicates one flat surface 211 side of the flat surface portion 21 with the other flat surface 212 side of the flat surface portion 21. The communication hole 210 communicates with a heat insulating chamber 100 described later.

  The outer peripheral projection 22 is provided on the outer peripheral edge of one flat surface 211 of the flat surface portion 21. The outer peripheral protrusion 22 is formed so as to protrude from the one flat surface 211 toward the high temperature side panel 10. In the first embodiment, the outer peripheral projection 22 is formed to have a substantially square ring shape as shown in FIG. A gap 200 is formed between the end surface 221 of the outer peripheral protrusion 22 on the high temperature side panel 10 side and the other flat surface 102 of the high temperature side panel 10. The gap 200 is formed all around in the radially outward direction of the seal member 30 described later.

  The inner circumferential protrusion 23 is provided in the plane portion 21 at a position away from the outer circumferential protrusion 22 by a certain distance in the radially inward direction of the outer circumferential protrusion 22. The inner peripheral protrusion 23 is formed so as to protrude from the one flat surface 211 toward the high temperature side panel 10. In the first embodiment, as shown in FIG. 2, the inner peripheral projection 23 is formed in a substantially square ring shape. The height of the inner peripheral protrusion 23 from one plane 211 is lower than the height of the outer peripheral protrusion 22 from one plane 211. That is, a gap larger than the gap 200 is formed between the end surface 231 of the inner peripheral protrusion 23 on the high temperature side panel 10 side and the other flat surface 102 of the high temperature side panel 10. The inner circumferential protrusion 23 holds the heat insulation chamber 100 in a predetermined position so that the seal member 30 is not displaced when the pressure is reduced.

  The passage forming part 24 is a cylindrical part provided on the other flat surface 212 of the flat surface part 21. The passage forming portion 24 is formed to extend from the other flat surface 212 in the direction opposite to the outer wall 8. The passage 240 included in the passage formation portion 24 communicates with the communication hole 210.

  The seal member 30 is provided between the high temperature side panel 10 and the low temperature side panel 20. In the first embodiment, as shown in FIG. 2, the seal member 30 is formed in a square ring shape so as to be provided along the outer circumferences of the high temperature side panel 10 and the low temperature side panel 20. The seal member 30 includes a high temperature side contact portion 31 and a low temperature side contact portion 32.

  The high temperature side contact portion 31 is in contact with the other flat surface 102 of the high temperature side panel 10. The high temperature side contact portion 31 has two contact surfaces 311 that contact the other flat surface 102. The two contact surfaces 311 are subjected to surface treatment or application of a treatment agent so as to be able to slide on the other flat surface 102. A groove 310 is formed between the two contact surfaces 311. The groove 310 can be deformed when the high temperature side panel 10 moves relative to the seal member 30. Thereby, the contact state of the two contact surfaces 311 and the other flat surface 102 is maintained.

  The low temperature side contact portion 32 is in contact with one flat surface 211 of the low temperature side panel 20. The low temperature side contact portion 32 is accommodated between the outer peripheral protrusion 22 and the inner peripheral protrusion 23. Thereby, the movement of the low temperature side contact part 32 on the one plane 211 of the low temperature side panel 20 is regulated.

  The seal member 30 is made of a material that can be deformed corresponding to the relative movement between the high temperature side panel 10 and the low temperature side panel 20, for example, silicone rubber. The seal member 30 forms a heat-insulating chamber 100 that can be decompressed together with the high temperature side panel 10 and the low temperature side panel 20. At this time, the sealing member 30 can maintain airtightness with the other flat surface 102 of the high temperature side panel 10 and with one flat surface 211 of the low temperature side panel 20.

  A plurality of spheres 35 are provided in the heat insulating chamber 100. The sphere 35 has a strength capable of withstanding the atmospheric pressure acting on the high temperature side panel 10 and the low temperature side panel 20 when the heat insulating chamber 100 is depressurized, and has a relatively low thermal conductivity. It is made of zirconia. In the first embodiment, nine spheres 35 are provided in the heat insulating chamber 100 as shown in FIG. The sphere 35 is formed to be able to contact the other flat surface 102 of the high temperature side panel 10 and the one flat surface 211 of the low temperature side panel 20 in a relatively small area. The spherical body 35 maintains a state where the high temperature side panel 10 and the low temperature side panel 20 are separated from each other.

  The positioning member 37 is provided so as to be spread over almost the entire area of the heat insulating chamber 100. As shown in FIG. 2, the positioning member 37 is formed in a mesh shape from a plurality of thin plate-like members. The length of the positioning member 37 in the axial direction is a length that does not contact both the high temperature side panel 10 and the low temperature side panel 20 even if the high temperature side panel 10 or the low temperature side panel 20 is deformed by the pressure reduction or heat of the heat insulating chamber 100. It has become. As shown in FIG. 1, a notch 371 is formed on the positioning member 37 on the high temperature side panel 10 side. Thereby, the contact area between the positioning member 37 and the high temperature side panel 10 is reduced.

  One spherical body 35 is accommodated in each of the plurality of meshes 370 included in the positioning member 37. Thereby, the positioning member 37 regulates the movement of the sphere 35 in the heat insulating chamber 100. The mesh 370 of the positioning member 37 is formed to be larger than the size of the sphere 35. Thereby, even if the high temperature side panel 10 and the low temperature side panel 20 move relatively, the sphere 35 accommodated in the mesh 370 rotates so that the high temperature side panel 10 and the low temperature side panel 20 are separated from each other. It is possible to maintain.

  The holding portion 40 is provided on the opposite side of the low temperature side panel 20 from the high temperature side panel 10 and in the radially outward direction of the high temperature side panel 10 and the low temperature side panel 20. The pressing portion 40 includes a heat insulating member 41, a plurality of contact members 42, a plurality of springs 43, and a support member 44.

The heat insulating member 41 is made of rock wool, for example. The heat insulating member 41 includes a first heat insulating part 411 and a second heat insulating part 412.
The first heat insulating portion 411 is provided on the other flat surface 212 of the low temperature side panel 20. A contact member 42 and a spring 43 are accommodated in the first heat insulating portion 411. The first heat insulating part 411 is a separate body and holds the low temperature side panel 20 together with the spring 43 so that the heat insulating chamber 100 is formed by the replaceable high temperature side panel 10 and the low temperature side panel 20. Moreover, the 1st heat insulation part 411 ensures the airtightness of the heat insulation chamber 100 by the sealing member 30 by maintaining the low temperature side panel 20 in a predetermined position, when depressurizing the heat insulation chamber 100.

  The second heat insulating portion 412 is provided on the outer wall surface 81 of the outer wall 8 in the radially outward direction of the high temperature side panel 10 and the low temperature side panel 20. Specifically, as shown in FIG. 2, the second heat insulating portion 412 is formed so as to cover the radially outer side of the high temperature side panel 10 and the radially outer side of the outer peripheral projection 22 of the low temperature side panel 20. .

  The contact member 42 is provided on the other flat surface 212 of the low temperature side panel 20. Specifically, the contact member 42 is provided so as to contact the portion of the low temperature side panel 20 where the seal member 30 is provided.

  Each of the plurality of springs 43 is supported at one end by one of the plurality of contact members 42. The other end is supported by the support member 44. The spring 43 has a biasing force that biases the low temperature side panel 20 in the direction of the outer wall 8 via the contact member 42. The spring 43 ensures airtightness of the heat insulation chamber 100 by the seal member 30 when the heat insulation chamber 100 is decompressed.

  The support member 44 is provided so as to cover the heat insulating member 41 on the opposite side of the heat insulating member 41 from the low temperature side panel 20. The support member 44 is detachably fixed to a fixing member (not shown). The support member 44 supports the spring 43 so that the urging force of the spring 43 becomes a force that urges the low temperature side panel 20 toward the high temperature side panel 10.

(A) In the heat insulating device 1 according to the first embodiment, the high temperature side panel 10 and the low temperature side panel 20 are provided in a separated state, and therefore heat generated by the transfer of heat from the high temperature side panel 10 to the low temperature side panel 20. Can be moved to zero. Thereby, since the heat insulation apparatus 1 can reduce the heat transfer amount from the high temperature side panel 10 to the low temperature side panel 20, it can improve heat insulation performance.
Moreover, in the heat insulation apparatus 1, the high temperature side panel 10 and the low temperature side panel 20 move relatively by the thermal expansion difference resulting from the temperature difference between the high temperature side panel 10 and the low temperature side panel 20. Even if there is a relative movement between the high temperature side panel 10 and the low temperature side panel 20, the seal member 30 is deformed following the relative movement, and the heat insulation chamber 100 can be kept airtight. Thereby, compared with the case where the high temperature side panel 10 and the low temperature side panel 20 are connected directly, the damage by the deformation | transformation resulting from a thermal expansion difference can be prevented.
Thus, the heat insulation apparatus 1 according to the first embodiment reduces the amount of heat transfer from the high temperature side panel 10 to the low temperature side panel 20 by providing the high temperature side panel 10 and the low temperature side panel 20 in a separated state, The deformable seal member 30 can prevent damage due to a difference in thermal expansion. Therefore, the heat insulation apparatus 1 according to the first embodiment can prevent breakage due to heat while improving the heat insulation performance.

  (B) In the heat insulating device 1, the seal member 30 is provided along the outer periphery of the high temperature side panel 10 and the low temperature side panel 20. Thereby, since the area of the heat insulation chamber 100 decompressed can be enlarged, the heat insulation performance of the heat insulation apparatus 1 can further be improved.

(C) The two contact surfaces 311 of the seal member 30 are subjected to surface treatment or application of a treatment agent so that the other flat surface 102 can slide. Thereby, when the high temperature side panel 10 and the low temperature side panel 20 move relatively, the sealing member 30 can maintain airtightness of the heat insulation chamber 100 while sliding smoothly with respect to the high temperature side panel 10.
A groove 310 is formed between the two contact surfaces 311. Accordingly, the groove 310 is deformed when the high temperature side panel 10 and the low temperature side panel 20 are relatively moved, so that the contact state between the contact surface 311 and the other flat surface 102 is maintained, and the seal member 30 and the high temperature side are maintained. Airtightness with the panel 10 can be reliably maintained. Further, by having the groove 310, the contact area of the sealing member 30 with the high temperature side panel 10 is reduced, and a seal for ensuring airtightness between the sealing member 30 and the high temperature side panel 10 and the low temperature side panel 20. The force that deforms the member 30 can be reduced. Moreover, the reliability of the airtightness of the sealing member 30 and the high temperature side panel 10 can be improved by contacting twice.

  (D) In the heat insulating device 1, the high temperature side panel 10 and the low temperature side panel 20 are kept separated by the sphere 35. Since the contact area between the high temperature side panel 10 and the low temperature side panel 20 and the sphere 35 is relatively small, the amount of heat transfer through the sphere 35 can be reduced. Therefore, the heat insulating performance of the heat insulating device 1 can be further improved.

  (E) The heat insulating device 1 includes a pressing portion 40 that can press the low temperature side panel 20 in the direction of the high temperature side panel 10. Thereby, since the adhesion degree of the high temperature side panel 10 and the low temperature side panel 20 and the sealing member 30 is increased, when the heat insulating chamber 100 is first decompressed, the air tightness of the heat insulating chamber 100 can be stably and reliably maintained. .

  (F) Moreover, the holding | suppressing part 40 has the 2nd heat insulation part 412 which covers the radial direction outer side of the high temperature side panel 10, and the radial direction outer side of the outer peripheral protrusion 22 of the low temperature side panel 20. FIG. Thereby, the amount of heat released in the radial direction of the high temperature side panel 10 and the low temperature side panel 20 can be reduced. Therefore, the heat insulating performance of the heat insulating device 1 can be further improved.

  (G) The heat insulating device 1 includes a passage forming portion 24 that can communicate the heat insulating chamber 100 with the outside of the heat insulating device 1. Thereby, after attaching the heat insulation apparatus 1 to the outer wall 8 of the heating furnace 7, before operating the heating furnace 7 and becoming high temperature, the heat insulation performance of the heat insulation apparatus 1 can be confirmed by reducing the pressure with a pump or the like. Moreover, when the pressure of one of the plurality of heat insulation chambers 100 increases during use of the heat insulation device 1 and the heat insulation performance cannot be maintained, the heat insulation performance of the heat insulation device 1 is recovered by decompressing the heat insulation chamber 100 with a pump or the like. be able to. Therefore, the heat insulating device 1 can easily perform maintenance for improving the heat insulating performance.

  (H) In the heat insulating device 1, the high temperature side panel 10 and the low temperature side panel 20 are formed separately and are provided in a separated state. Thereby, when it becomes impossible to maintain the airtightness of the heat insulation chamber 100 due to deformation caused by a difference in thermal expansion or deterioration due to repeated heating and cooling, only the problematic part of the high temperature side panel 10 or the low temperature side panel 20 is easily replaced. be able to.

(Second embodiment)
The heat insulation apparatus by 2nd embodiment is demonstrated based on FIG. The second embodiment differs from the first embodiment in that the shape of the intermediate member is different.

  The heat insulating device 2 according to the second embodiment includes a high temperature side panel 10, a low temperature side panel 20, a seal member 30, a plurality of spheres 35, a mesh member 57 as an “intermediate member”, and a pressing portion 40. In FIG. 3, the seal member 30, the sphere 35, the mesh member 57, and the pressing portion 40 are described to be relatively large in order to make the configuration of the heat insulating device 2 easy to understand.

  The mesh member 57 is provided so as to be spread over almost the entire heat insulating chamber 100. The mesh member 57 is provided so as to be movable relative to the high temperature side panel 10 and the low temperature side panel 20. The mesh member 57 has a mesh shape formed by combining a plurality of plate members 571. The plate-like member 571 is a thin plate-like member so that the contact area between the high-temperature side panel 10 and the low-temperature side panel 20 is small, and is formed from a material having a relatively low thermal conductivity.

  In the heat insulating device 2 according to the second embodiment, the high temperature side panel 10 and the low temperature side panel 20 are provided in a state of being separated by a mesh member 57 while maintaining a certain distance. Thereby, the heat insulation apparatus 2 by 2nd embodiment has the effect (a)-(c), (e)-(h) of 1st embodiment.

(Third embodiment)
The heat insulation apparatus by 3rd embodiment is demonstrated based on FIG. In 3rd embodiment, the shape of the outer wall in which a heat insulation apparatus is provided differs from 1st embodiment.

  The heat insulating device 3 according to the third embodiment includes a high temperature side panel 10, a low temperature side panel 20, a seal member 30, a plurality of spheres 35, a positioning member 37, and a pressing portion 40. As shown in FIG. 4, the heat insulating device 3 is provided so as to close the opening 80 formed in the outer wall 8. The opening 80 is used for maintenance of the heating furnace 7, for example. In FIG. 4, the seal member 30, the sphere 35, the positioning member 37, and the pressing portion 40 are shown to be relatively large for easy understanding of the configuration of the heat insulating device 3.

  The heat insulating device 3 according to the third embodiment is provided so as to close the opening 80 formed in the outer wall 8. Thereby, 3rd embodiment has the same effect as 1st embodiment, and can also serve as the outer wall of a heat source.

(Other embodiments)
In the above-described embodiment, the heat insulating device is configured to prevent heat generated in the heating furnace having a relatively high temperature from moving from the high temperature side panel to the low temperature side panel. However, the field to which the heat insulating device is applied is not limited to this. It may be used to prevent the cold generated from the cold heat generation source having a relatively low temperature from moving from the low temperature side panel to the high temperature side panel.

  In the above-described embodiment, the high temperature side panel and the low temperature side panel are formed in a flat plate shape. However, the high temperature side panel and the low temperature side panel may not be flat. It may be formed in a curved surface shape.

  In the above-described embodiment, the contact surface of the high temperature side contact portion of the seal member is subjected to surface treatment or application of a treatment agent so as to be able to slide on the other flat surface of the high temperature side panel. However, the location where the surface treatment or the treatment agent is applied is not limited thereto. Surface treatment or application of a treatment agent may be performed so that the low temperature side contact portion of the seal member can move with respect to the low temperature side panel.

  In the first embodiment, the heat insulating device includes a plurality of spheres for maintaining a state in which the high temperature side panel and the low temperature side panel are separated from each other. In the second embodiment, the heat insulating device includes a mesh member for maintaining a state in which the high temperature side panel and the low temperature side panel are separated from each other. However, the “intermediate member” for maintaining the state where the high temperature side panel and the low temperature side panel are separated from each other is not limited thereto.

  In the above-described embodiment, the low temperature side panel is biased toward the outer wall by the biasing force of the spring. However, the force for urging the low temperature side panel toward the outer wall is not limited to this. The acting force by the actuator, the fastening force of the bolt, or the gravity of the weight may be used.

  In the above-described embodiment, the low-temperature side panel has a passage forming portion capable of communicating the heat insulating chamber and the outside of the heat insulating device. There may not be a passage formation part.

  In the first embodiment, the positioning member has a notch on the high temperature side panel side. The cutout may be on the low temperature panel side. In this case, heat transfer from the high temperature side panel to the positioning member can be suppressed. Moreover, this notch may be applied to the mesh member of the second embodiment.

  As mentioned above, this invention is not limited to such embodiment, It can implement with a various form in the range which does not deviate from the summary.

1, 2, 3 ... heat insulation device 10 ... high temperature side panel (high temperature side member)
20 ... Low temperature side panel (low temperature side member)
30 ... Sealing member 100 ... Insulation chamber

Claims (10)

A heat insulating device that suppresses heat transfer between the high temperature side and the low temperature side,
A high temperature side member (10) provided on the high temperature side;
A low temperature side member (20) formed separately from the high temperature side member and provided on the low temperature side in a state of being separated from the high temperature side member;
It is provided between the high temperature side member and the low temperature side member, can be deformed corresponding to the relative movement of the high temperature side member and the low temperature side member, and the high temperature side member and the low temperature side member A sealing member (30) formed between and capable of maintaining the hermeticity of the heat-insulating chamber (100) capable of depressurization;
Insulation device comprising.   The seal member moves along a high temperature side facing surface (102) facing the low temperature side member of the high temperature side member or a low temperature side facing surface (211) facing the high temperature side member of the low temperature side member. The heat insulation apparatus of Claim 1 formed so that it was possible.   The heat insulating device according to claim 1, wherein the seal member is provided along an outer periphery of at least one of the high temperature side member or the low temperature side member.   The heat insulation apparatus as described in any one of Claims 1-3 further equipped with the intermediate member (35,57) accommodated in the said heat insulation chamber and which can maintain the state which the said high temperature side member and the said low temperature side member separated. .   The said intermediate member is a heat insulation apparatus of Claim 4 formed so that a movement corresponding to the relative movement of the said high temperature side member and the said low temperature side member was possible.   The heat insulating device according to claim 4, wherein the intermediate member is formed in a spherical shape.   The heat insulating device according to claim 6, further comprising a restriction portion (37) for restricting movement of the intermediate member formed in a spherical shape.   The heat insulation apparatus according to any one of claims 1 to 7, wherein the high temperature side member and the low temperature side member are formed in a flat plate shape.   The heat insulation as described in any one of Claims 1-8 further equipped with the holding | suppressing part (40) which presses one of the said high temperature side member or the said low temperature side member toward the other of the said low temperature side member or the said high temperature side member. apparatus.   When the high temperature side member and the low temperature side member are formed in a flat plate shape, the pressing portion is provided in a radially outward direction of the high temperature side member and the low temperature side member, and the high temperature side member and the low temperature side member The heat insulation apparatus of Claim 9 which has a heat insulation member (41) formed so that a radial direction outer side may be covered.

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