Rotary atmosphere sintering furnace

Abstract

The utility model provides a rotating atmosphere sintering furnace. The rotating atmosphere sintering furnace comprises a furnace body, a platform, a heat insulation piece, an air inlet pipe, a heating assembly, an exhaust port and a rotating mechanism. The furnace body comprises a bottom wall, a peripheral wall and a top wall, and a closed cavity is defined by the bottom wall, the peripheral wall and the top wall. The platform is located in the closed cavity and is separated from the bottom wall and the peripheral wall; the heat insulation piece is arranged on the platform, is used for insulating heat and supporting a material to be sintered and is separated from the peripheral wall; the gas inlet pipe penetrates through the furnace body, the tail end of the gas inlet pipe is located above the heat insulation piece, and mixed gas containing nitrogen and hydrogen is introduced into the gas inlet pipe. The heating assembly is located above the heat insulation piece and used for providing heat. The exhaust port is formed in the furnace body and used for forming pressure maintained by flowing gas; the rotating mechanism hermetically penetrates through the bottom wall and is used for driving the platform, the heat insulation piece and the to-be-sintered material to rotate; the rotating atmosphere sintering furnace further comprises a heat insulation nitrogen inlet, and the heat insulation nitrogen inlet penetrates through the peripheral wall, is formed in the interval between the bottom wall and the platform in the vertical direction and is used for introducing nitrogen.

Description

Technical Field

[0001] The present disclosure relates to the field of sintering, and more particularly to a rotary atmosphere sintering furnace. Background Art

[0002] Figure 1 It is a schematic structural diagram of a known rotary atmosphere sintering furnace.

[0003] like Figure 1 As shown, the conventional rotary atmosphere sintering furnace 1000' comprises a furnace body 11', a platform 12', a heat insulating member 13', an air inlet pipe 14', a heating assembly 15', an exhaust port 16', and a rotating mechanism 17'.

[0004] The furnace body 11' includes a bottom wall 111', a peripheral wall 112' and a top wall 113', and the bottom wall 111', the peripheral wall 112' and the top wall 113' enclose a closed cavity S'. The platform 12' is located in the closed cavity S', and is separated from the bottom wall 111' in the vertical direction D1, and is separated from the peripheral wall 112' in the horizontal direction D2. The heat insulating member 13' is arranged on the upper surface of the platform 12', and the heat insulating member 13' is used to insulate the platform 12' from above and to support the material 2000 to be sintered. The heat insulating member 13' is separated from the peripheral wall 112' in the horizontal direction D2. The air inlet pipe 14' passes through the furnace body 11', and the end of the air inlet pipe 14' is located above the heat insulating member 13'. The air inlet pipe 14' is used to pass a mixed gas containing nitrogen and hydrogen into the closed cavity S' of the furnace body 11'. The heating assembly 15' is arranged in the furnace body 11', in the closed cavity S' and above the heat insulating member 13', and the heating assembly 15' is used to provide heat to the mixed gas in the closed cavity S' and the material 2000 to be sintered. The exhaust port 16' is arranged in the furnace body 11', and the exhaust port 16' is used to allow the mixed gas in the closed cavity S' of the furnace body 11' to be exhausted through the exhaust port 16' to form a pressure maintained by the flowing gas in the closed cavity S'. The rotating mechanism 17' is sealed through the bottom wall 111', and the rotating mechanism 17' is used to drive the platform 12' above the bottom wall 111', the heat insulating member 13' and the material 2000 to be sintered to rotate.

[0005] In the known rotary atmosphere sintering furnace 1000', since the platform 12', the thermal insulation member 13' and the material 2000 to be sintered above the bottom wall 111' rotate driven by the rotating mechanism 17', the platform 12' and the thermal insulation member 13' are separated from the peripheral wall 112' in the horizontal direction D2, which causes a gap (i.e., a gap) to always exist between the platform 12' and the thermal insulation member 13' and the peripheral wall 112' in the horizontal direction D2.

[0006] Because the platform 12 ′ is spaced apart from the bottom wall 111 ′ in the up-down direction D1 , there is always a space (ie, a gap) between the platform 12 ′ and the bottom wall 111 ′ in the up-down direction D1 .

[0007] During the operation of the known rotary atmosphere sintering furnace 1000', although the heat insulating member 13' can insulate from the upper platform 12', the heat of the mixed gas containing nitrogen and hydrogen and the heat of the material 2000 to be sintered introduced into the heating inlet pipe 14' by the heating assembly 15' above the heat insulating member 13' will enter the gap between the bottom wall 111' and the platform 12' in the vertical direction D1 along with the mixed gas through the gap between the platform 12' and the heat insulating member 13' and the peripheral wall 112' in the horizontal direction D2, and then the platform 12' will be insulated from the bottom. When heated, the platform 12' will overheat, thereby generating thermal stress. This thermal stress forms residual stress as the use process of the platform 12' extends, thereby causing the platform 12' to deform. Because the deformed platform 12' has to rotate with the heat insulation 13' and the material 2000 to be sintered driven by the rotating mechanism 17', the deformed platform 12' will present an axially asymmetric rotation state when rotating, and the rotating material 2000 will also present an axially asymmetric rotation state, which affects the atmosphere sintering quality of the rotating material 2000.

[0008] In addition, since there is a portion where the rotating mechanism 17' is connected to the platform 12' in the gap between the bottom wall 111' and the platform 12' in the vertical direction D1, the heat from the heating assembly 15' above the thermal insulation member 13' that heats the air inlet pipe 14' to pass a mixed gas containing nitrogen and hydrogen and the heat of the material 2000 to be sintered will enter the gap between the bottom wall 111' and the platform 12' in the vertical direction D1 along with the mixed gas through the gap between the platform 12' and the thermal insulation member 13' and the surrounding wall 112' in the horizontal direction D2. The heat will simultaneously heat the portion where the rotating mechanism 17' is connected to the platform 12' in the gap between the bottom wall 111' and the platform 12' in the vertical direction D1, which is not conducive to the cooling protection of the portion where the rotating mechanism 17' is connected to the platform 12'. Utility Model Content

[0009] In view of the problems existing in the background technology, an object of the present disclosure is to provide a rotary atmosphere sintering furnace, which can prevent the platform of the rotary atmosphere sintering furnace from being heated by the heat provided by the heating component.

[0010] Another object of the present disclosure is to provide a rotary atmosphere sintering furnace, which can provide cooling protection for the portion where the rotary mechanism is connected to the platform.

[0011] Thus, a rotary atmosphere sintering furnace is provided, which includes a furnace body, a platform, a heat insulating member, an air inlet pipe, a heating assembly, an exhaust port, and a rotating mechanism; the furnace body includes a bottom wall, a peripheral wall, and a top wall, and the bottom wall, the peripheral wall, and the top wall form a closed cavity; the platform is located in the closed cavity, spaced apart from the bottom wall in the vertical direction, and spaced apart from the peripheral wall in the horizontal direction; the heat insulating member is arranged on the upper surface of the platform, and the heat insulating member is used to insulate the platform from above and to support the material to be sintered, and the heat insulating member is spaced apart from the peripheral wall in the horizontal direction; the air inlet pipe passes through the furnace body, and the end of the air inlet pipe is located above the heat insulating member, and the air inlet pipe is used to introduce a mixed gas containing nitrogen and hydrogen into the closed cavity of the furnace body; the heating assembly is arranged in the furnace body, located in the closed cavity and located above the heat insulating member, and the heating assembly is used to provide the mixed gas in the closed cavity and the material to be sintered. Heat supply; an exhaust port is arranged on the furnace body, and the exhaust port is used to allow the mixed gas in the closed cavity of the furnace body introduced into the air inlet pipe to form a pressure maintained by flowing gas in the closed cavity through the exhaust gas of the exhaust port; a rotating mechanism seals and passes through the bottom wall, and the rotating mechanism is used to drive the platform above the bottom wall, the thermal insulation member and the material to be sintered to rotate; the rotary atmosphere sintering furnace also includes an insulated nitrogen inlet, which is arranged through the peripheral wall in the gap between the bottom wall and the platform in the vertical direction, and the insulated nitrogen inlet is used to pass nitrogen into the gap between the bottom wall and the platform in the vertical direction and the introduced nitrogen enters the part of the closed cavity above the thermal insulation member through the gap between the platform and the thermal insulation member and the peripheral wall in the horizontal direction to prevent the heat provided by the heating component of the rotary atmosphere sintering furnace from entering the gap between the bottom wall and the platform in the vertical direction through the gap between the platform and the thermal insulation member and the peripheral wall in the horizontal direction.

[0012] The beneficial effects of the present disclosure are as follows.

[0013] In the rotary atmosphere sintering furnace disclosed in the present invention, the nitrogen is introduced into the gap between the bottom wall and the platform in the vertical direction through the insulated nitrogen inlet, and the introduced nitrogen enters the closed cavity above the insulator through the gap between the platform, the insulator and the peripheral wall in the horizontal direction to prevent the heat provided by the heating component of the rotary atmosphere sintering furnace from entering the gap between the bottom wall and the platform in the vertical direction through the gap between the platform, the insulator and the peripheral wall in the horizontal direction, so that the nitrogen introduced through the insulated nitrogen inlet forms an insulation protection of nitrogen from the outside (this part of nitrogen is room temperature) on the bottom and side surfaces of the platform, that is, it has an effect similar to air cooling. As a result, the heat will not heat the platform from below, the platform will not be overheated, and thermal stress will not be generated. With the extension of the use process of the platform, residual stress will not be formed, and the platform will not be deformed, ensuring that the platform presents an axisymmetric rotation state when rotating, ensuring that the rotating material presents an axisymmetric rotation state, and finally ensuring the atmosphere sintering quality of the rotating material. In addition, the thermal insulation protection formed on the bottom and surrounding sides of the platform by the nitrogen introduced through the thermal insulation nitrogen inlet and the thermal insulation protection formed on the top surface of the platform by the thermal insulation component form a complete and fully enclosed thermal insulation protection for the platform.

[0014] Since there is a portion where the rotating mechanism is connected to the platform in the gap between the bottom wall and the platform in the vertical direction, and since the nitrogen introduced through the insulated nitrogen inlet will fill the portion where the rotating mechanism is connected to the platform in the gap between the bottom wall and the platform in the vertical direction, the nitrogen will simultaneously cool and protect the portion where the rotating mechanism is connected to the platform in the gap between the bottom wall and the platform in the vertical direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic structural diagram of a known rotary atmosphere sintering furnace.

[0016] Figure 2 It is a schematic structural diagram of a rotary atmosphere sintering furnace according to the present disclosure.

[0017] The reference numerals are described as follows:

[0018] D1 Up and down direction 1000 rotary atmosphere sintering furnace

[0019] D2 horizontal direction 11 furnace body

[0020] 1000' Rotary Atmosphere Sintering Furnace 111 Bottom Wall

[0021] 11' furnace body 112 surrounding wall

[0022] 111' bottom wall 113 top wall

[0023] 112' surrounding wall S closed cavity

[0024] 113' top wall 12 platforms

[0025] S' closed cavity 121 plug-in part

[0026] 12' platform 13 insulation

[0027] 121 plug-in portion 14 air intake pipe

[0028] 13' insulation 141 holes

[0029] 14' intake pipe 15 heating component

[0030] 141' hole 151 outer heating element

[0031] 15' heating component 152 intermediate heating element

[0032] 151' outer heating element 153 upper heating element

[0033] 152' middle heating element 154 lower end heating element

[0034] 153' upper end heating element 155 exhaust port heating element

[0035] 154' lower end heating element 16 exhaust port

[0036] 155' Exhaust port position heating element 17 rotating mechanism

[0037] 16' exhaust port 171 motor

[0038] 17' rotating mechanism 172 driven wheel

[0039] 171' Motor 173 connecting shaft

[0040] 172' driven wheel 174 belt

[0041] 173' connecting shaft 18 insulation nitrogen inlet

[0042] 174' belt 19 bearings

[0043] 19' bearing 191 inner ring

[0044] 191' inner circle 192 outer circle

[0045] 192' outer ring 193 ball

[0046] 193' ball 20 circulating cooling water channel

[0047] 21' limit column 21 limit column

[0048] C' Accommodation Space C Accommodation Space

[0049] 22' support column 22 support column

[0050] 23' Base 23 Base

[0051] 24' setter plate 24 setter plate

[0052] 2000 Materials DETAILED DESCRIPTION

[0053] The accompanying drawings show embodiments of the present disclosure, and it will be understood that the disclosed embodiments are merely examples of the present disclosure, and the present disclosure can be implemented in various forms. Therefore, the specific details disclosed herein should not be interpreted as limiting, but merely as the basis for the claims and as a representative basis for teaching ordinary technicians in the field to implement the present disclosure in various ways.

[0054] Figure 2 It is a schematic structural diagram of a rotary atmosphere sintering furnace according to the present disclosure.

[0055] like Figure 2 As shown, the rotary atmosphere sintering furnace 1000 according to the present disclosure includes a furnace body 11 , a platform 12 , a heat insulating member 13 , an air inlet pipe 14 , a heating assembly 15 , an exhaust port 16 , a rotating mechanism 17 , and a heat insulating nitrogen inlet 18 .

[0056] The furnace body 11 includes a bottom wall 111, a peripheral wall 112 and a top wall 113, and the bottom wall 111, the peripheral wall 112 and the top wall 113 enclose a closed cavity S. The platform 12 is located in the closed cavity S, and is separated from the bottom wall 111 in the vertical direction D1, and is separated from the peripheral wall 112 in the horizontal direction D2. The heat insulating member 13 is arranged on the upper surface of the platform 12, and the heat insulating member 13 is used to insulate the platform 12 from above and to support the material 2000 to be sintered. The heat insulating member 13 is separated from the peripheral wall 112 in the horizontal direction D2. The air inlet pipe 14 passes through the furnace body 11, and the end of the air inlet pipe 14 is located above the heat insulating member 13. The air inlet pipe 14 is used to pass a mixed gas containing nitrogen and hydrogen into the closed cavity S of the furnace body 11. The heating assembly 15 is disposed in the furnace body 11, in the closed cavity S and above the heat insulating member 13, and is used to provide heat to the mixed gas in the closed cavity S and the material 2000 to be sintered. The exhaust port 16 is disposed in the furnace body 11, and is used to allow the mixed gas in the closed cavity S of the furnace body 11 to be exhausted through the exhaust port 16 by the air inlet pipe 14 to form a pressure maintained by the flowing gas in the closed cavity S. The rotating mechanism 17 seals through the bottom wall 111, and is used to drive the platform 12 above the bottom wall 111, the heat insulating member 13 and the material 2000 to be sintered to rotate. The insulated nitrogen inlet 18 passes through the peripheral wall 112 and is arranged in the gap in the vertical direction D1 between the bottom wall 111 and the platform 12. The insulated nitrogen inlet 18 is used to pass nitrogen into the gap in the vertical direction D1 between the bottom wall 111 and the platform 12, and the introduced nitrogen enters the part of the closed cavity S above the thermal insulation member 13 through the gap between the platform 12 and the thermal insulation member 13 and the peripheral wall 112 in the horizontal direction D2 to prevent the heat provided by the heating assembly 15 of the rotary atmosphere sintering furnace 1000 from entering the gap in the vertical direction D1 between the bottom wall 111 and the platform 12 through the gap between the platform 12 and the thermal insulation member 13 and the peripheral wall 112 in the horizontal direction D2.

[0057] In the rotary atmosphere sintering furnace 1000 disclosed in the present invention, the insulated nitrogen inlet 18 is used to pass nitrogen into the gap between the bottom wall 111 and the platform 12 in the vertical direction D1, and the introduced nitrogen enters the closed cavity S above the thermal insulation member 13 through the gap between the platform 12 and the thermal insulation member 13 and the surrounding wall 112 in the horizontal direction D2 to prevent the heat provided by the heating component 15 of the rotary atmosphere sintering furnace 1000 from entering the gap between the bottom wall 111 and the platform 12 in the vertical direction D1 through the gap between the platform 12 and the thermal insulation member 13 and the surrounding wall 112 in the horizontal direction D2. In this way, the nitrogen passed through the insulated nitrogen inlet 18 forms thermal insulation protection from external nitrogen (this part of nitrogen is at room temperature) on the bottom surface and the surrounding side surface of the platform 12, which has an effect similar to air cooling. Therefore, the heat will not heat the platform 12 from below, the platform 12 will not be overheated, and thus thermal stress will not be generated. As the use process of the platform 12 is extended, residual stress will not be formed, and the platform 12 will not deform, ensuring that the platform 12 presents an axisymmetric rotation state when rotating, ensuring that the rotating material 2000 presents an axisymmetric rotation state, and ultimately ensuring the atmosphere sintering quality of the rotating material 2000. In addition, the heat insulation protection formed by the nitrogen introduced through the heat insulation nitrogen inlet 18 on the bottom and peripheral side surfaces of the platform 12 and the heat insulation protection formed by the heat insulation member 13 on the top surface of the platform 12 form a complete and fully enclosed heat insulation protection for the platform 12.

[0058] Since there is a portion where the rotating mechanism 17 and the platform 12 are connected in the gap in the up-down direction D1 between the bottom wall 111 and the platform 12, and since the nitrogen introduced through the insulated nitrogen inlet 18 will fill the portion, the nitrogen will simultaneously cool and protect the portion where the rotating mechanism 17 and the platform 12 are connected in the gap in the up-down direction D1 between the bottom wall 111 and the platform 12.

[0059] It is additionally explained here that in the rotary atmosphere sintering furnace 1000 of the present disclosure, since the exhaust gas through the exhaust port 16 forms a pressure maintained by flowing gas in the closed cavity S, the nitrogen introduced in this way is also in the form of a flowing nitrogen flow. That is, the nitrogen introduced through the insulated nitrogen inlet 18 is a continuous process like the operation of introducing the mixed gas containing nitrogen and hydrogen into the closed cavity S of the furnace body 11 through the air inlet pipe 14, rather than a one-time introduction process.

[0060] In the rotary atmosphere sintering furnace 1000 of the present disclosure, the nitrogen introduced through the insulated nitrogen inlet 18 will not introduce different gases in gas type into the atmosphere of the mixed gas formed by nitrogen and hydrogen, which is beneficial to ensure the quality of atmosphere sintering.

[0061] Note that, Figure 1The only difference between the conventional rotary atmosphere sintering furnace 1000 ′ and the rotary atmosphere sintering furnace 1000 of the present disclosure is the heat-insulated nitrogen inlet 18 and the circulating cooling water flow channel 20 described later.

[0062] In one example, the top wall 113 is a detachable component relative to the peripheral wall 112. During operation, the top wall 113 is opened to place the material 2000 to be sintered, and then the top wall 113 is closed and sealed on the top of the peripheral wall 112.

[0063] The material of the platform 12 is, for example but not limited to, steel, which has the characteristics of being resistant to high temperatures and not easily deformed.

[0064] The material of the thermal insulation member 13 is, for example but not limited to, alumina fiber thermal insulation material.

[0065] like Figure 2 As shown, the intake pipe 14 is arranged at the top wall 113 at the upper end and extends downward. The intake pipe 14 is provided with a plurality of holes 141 arranged at intervals in the axial direction and penetrating in the radial direction, thereby improving the uniformity of the mixed gas introduced into the closed cavity S by the intake pipe 14. In the example shown in the figure, two intake pipes 14 are arranged at the center of the platform 12, and a plurality of intake pipes 14 are arranged around the platform 12 along the circumference. The intake pipes 14 arranged along the circumference can be arranged at 90 degree intervals.

[0066] like Figure 2 As shown, the heating assembly 15 includes an outer heating element 151, an intermediate heating element 152, an upper heating element 153, a lower heating element 154, and an exhaust port heating element 155. The outer heating element 151 is suspended from the top wall 113 of the furnace body 11 and arranged around the circumference of the platform 12, and heats the material 2000 to be sintered from the radial outside. The intermediate heating element 152 is suspended from the top wall 113 of the furnace body 11 and is located at the center of the platform 12, and heats the material 2000 to be sintered from the radial inside. The upper heating element 153 is located on the peripheral wall 112 of the furnace body 11 at a radially outer position above the material 2000 to be sintered, and is used to perform compensatory heating when the temperature of the uppermost material 2000 to be sintered is lower than the overall temperature of all the materials 2000 to be sintered. The lower end heating element 154 is located on the peripheral wall 112 of the furnace body 11 and radially outward below the material 2000 to be sintered, and is used to perform compensatory heating when the temperature of the lowest material 2000 to be sintered is lower than the overall temperature of all the materials 2000 to be sintered. The exhaust port position heating element 155 is arranged on the inner surface of the top wall 113 and near the exhaust port 16 to compensate for the temperature near the exhaust port 16.

[0067] The exhaust port 16 is disposed on the top wall 113 of the furnace body 11 and near the intermediate heating element 152 .

[0068] like Figure 2As shown, in one example, the rotating mechanism 17 includes a motor 171, a driven wheel 172, a connecting shaft 173, and a belt 174. The motor 171 is located below the bottom wall 111, and the driven wheel 172 is located below the bottom wall 111 and is spaced and arranged side by side with the motor 171 in the horizontal direction D2; the connecting shaft 173 passes through the bottom wall 111 in a sealed manner along the up-down direction D1, the upper end of the connecting shaft 173 is fixedly connected to the platform 12 from below, and the lower end of the connecting shaft 173 is fixedly connected to the driven wheel 172 from above; the belt 174 is connected to the motor 171 and the driven wheel 172, and the belt 174 is used to move under the rotation drive of the motor 171 to drive the driven wheel 172, the connecting shaft 173, and the platform 12 to rotate. In addition, a bearing (not shown) is provided at the portion where the connecting shaft 173 passes through the bottom wall 111 in a sealed manner along the up-down direction D1.

[0069] Because the insulated nitrogen inlet 18 is used to form an insulated nitrogen flow that flows from the gap between the bottom wall 111 and the platform 12 in the vertical direction D1 to the gap between the platform 12 and the insulation member 13 and the peripheral wall 112 in the horizontal direction D2 and finally enters the closed cavity S to prevent the heat provided by the heating component 15 of the rotary atmosphere sintering furnace 1000 from entering the gap between the bottom wall 111 and the platform 12 in the vertical direction D1 through the gap between the platform 12 and the insulation member 13 and the peripheral wall 112 in the horizontal direction D2, the pressure formed by the insulated nitrogen flow is greater than the pressure maintained by the flowing gas formed by the air inlet pipe 14 and the exhaust port 16 in the closed cavity S. In one example, the pressure formed by the insulated nitrogen flow is slightly greater than the pressure formed between the pressures maintained by the flowing gas formed by the air inlet pipe 14 and the exhaust port 16 in the closed cavity S.

[0070] The adiabatic nitrogen inlet 18 is arranged in multiple locations to facilitate controlling the pressure of the adiabatic nitrogen flow.

[0071] like Figure 2 As shown, in one example, the rotary atmosphere sintering furnace 1000 further includes a bearing 19. The top of the inner ring 191 of the bearing 19 is fixedly connected to the platform 12 from below. The connecting shaft 173 is inserted into and fixedly connected to the inner ring 191 of the bearing 19. Further, the platform 12 is provided with a plug-in portion 121 extending downward; the plug-in portion 121 is inserted into the inner ring 191 of the bearing 19 from top to bottom and fixed to the inner ring 191 of the bearing 19. Thus, the assembly mode of the platform 12 and the connecting shaft 173 via the bearing 19 is realized.

[0072] Furthermore, if Figure 2 As shown, the top of the outer ring 192 of the bearing 19 is lower than the top of the inner ring 191 of the bearing 19, and the top of the outer ring 192 of the bearing 19 is spaced apart from the platform 12 in the up and down direction D1; a ball 193 is provided between the inner ring 191 and the outer ring 192 of the bearing 19.

[0073] In one example, if Figure 2As shown, the rotary sintering gasification furnace further includes a circulating cooling water channel 20, which is disposed on the bottom wall 111 and is used to cool and control the temperature of the bottom wall 111. By disposing the circulating cooling water channel 20, the platform 12 is cooled via the rotating mechanism 17 and the bottom wall 111, thereby preventing the platform 12 from being heated by the heat generated by the rotation of the rotating mechanism 17.

[0074] In one example, if Figure 2 As shown, the rotary atmosphere sintering furnace 1000 also includes a plurality of limit columns 21, a plurality of support columns 22, a plurality of bases 23, and a plurality of sintering plates 24. The plurality of limit columns 21 are respectively inserted and fixed in the heat insulating member 13, and the plurality of limit columns 21 are spaced into a plurality of accommodating spaces C in the circumferential direction, and the same radial upper limit limit columns 21 are spaced apart from each other in the circumferential direction. The corresponding support columns 22 are located between adjacent limit columns 21 and are inserted and fixed in the heat insulating member 13. Each base 23 is located in the corresponding accommodating space C, supported on the corresponding support column 22, and limited by the corresponding limit column 21 on both sides of the circumferential direction. Each sintering plate 24 is supported on the corresponding base 23 and limited by the corresponding limit column 21 on both sides of the circumferential direction, and the top surface of each sintering plate 24 is used to support the material 2000 to be sintered.

[0075] By each base 23 being on the corresponding support column 22, the corresponding support column 22 forms a suspended space under the base 23, and the suspended space is conducive to the heat of the aforementioned middle heating element 152 being heated from the bottom of all the bases 23, thereby improving the uniformity of heating the material 2000 to be sintered. Similarly, the suspended space is conducive to the heat of the aforementioned outer heating element 151 being heated from the bottom of all the bases 23, thereby improving the uniformity of heating the material 2000 to be sintered. Similarly, the suspended space is conducive to the heat of the aforementioned lower end heating element 154 being heated from the bottom of all the bases 23, thereby improving the uniformity of heating the material 2000 to be sintered.

[0076] Because multiple limit columns 21 are spaced apart in the circumferential direction to form multiple accommodating spaces C, the limit columns 21 and the base 23 are alternately arranged in the circumferential direction to form a mutual limiting effect, thereby improving the stability of the base 23 and the limit columns 21, and further improving the stability of the sintering plate 24 together with the material 2000 to be sintered.

[0077] The limiting column 21 and the supporting column 22 are inserted and fixed in the heat insulating member 13 to a depth sufficient to ensure that the limiting column 21 and the supporting column 22 are stable.

[0078] A plurality of accommodating spaces C are formed by circumferentially spacing a plurality of limiting columns 21, and the same radial upper limiting columns 21 are spaced apart from each other in the radial direction, which is beneficial for the heat generated by the aforementioned intermediate heating element 152 to heat the material 2000 to be sintered more effectively and evenly from the radial inner side, and is beneficial for the heat generated by the aforementioned outer heating element 151 to heat the material 2000 to be sintered more effectively and evenly from the radial outer side.

[0079] The material of the limiting column 21 is, for example, but not limited to, zirconium oxide. The material of the supporting column 22 is, for example, but not limited to, zirconium oxide. The material of the base 23 is, for example, but not limited to, silicon nitride. The material of the sintering plate 24 is, for example, but not limited to, alumina as a whole or a material with a zirconium oxide coating on the surface.

[0080] In addition, depending on the structure of the board 24, for example, the board 24 may be used. Figure 2 In the structure shown, the material 2000 to be sintered can also be placed on the top surface of the base 23, which improves space utilization and sintering efficiency.

[0081] exist Figure 2 In the example shown, in each accommodating space C, the baking plates 24 on each base 23 are stacked up and down in a stack; a plurality of accommodating spaces C are arranged at intervals along a full circle of 360 degrees, that is, each accommodating space C forms a fan-shaped form.

[0082] like Figure 2 As shown, each base 23 is slightly larger than the corresponding firing plate 24 in the circumferential direction. In other words, each firing plate 24 is slightly smaller than the corresponding base 23 in the circumferential direction.

[0083] The above detailed description is used to describe multiple exemplary embodiments, but this document is not intended to be limited to the explicitly disclosed combinations. Therefore, unless otherwise stated, the various features disclosed herein can be combined together to form multiple additional combinations that are not shown for the sake of simplicity.

Claims

1. A rotary atmosphere sintering furnace, characterized in that: The rotary atmosphere sintering furnace (1000) comprises a furnace body (11), a platform (12), a heat insulating member (13), an air inlet pipe (14), a heating assembly (15), an exhaust port (16), and a rotary mechanism (17); The furnace body (11) comprises a bottom wall (111), a peripheral wall (112) and a top wall (113), and the bottom wall (111), the peripheral wall (112) and the top wall (113) form a closed cavity (S); The platform (12) is located in the closed cavity (S), is spaced apart from the bottom wall (111) in the vertical direction (D1), and is spaced apart from the peripheral wall (112) in the horizontal direction (D2); A heat insulating member (13) is disposed on the upper surface of the platform (12), the heat insulating member (13) is used to insulate the platform (12) from above and to support the material (2000) to be sintered, and the heat insulating member (13) is spaced apart from the peripheral wall (112) in a horizontal direction (D2); An air inlet pipe (14) is arranged through the furnace body (11), the end of the air inlet pipe (14) is located above the heat insulating member (13), and the air inlet pipe (14) is used to introduce a mixed gas containing nitrogen and hydrogen into the closed cavity (S) of the furnace body (11); The heating component (15) is arranged on the furnace body (11), located in the closed cavity (S) and above the heat insulating member (13), and the heating component (15) is used to provide heat to the mixed gas in the closed cavity (S) and the material (2000) to be sintered; An exhaust port (16) is provided on the furnace body (11), and the exhaust port (16) is used to allow the mixed gas introduced into the closed cavity (S) of the furnace body (11) through the air inlet pipe (14) to form a pressure maintained by the flowing gas in the closed cavity (S) through the exhaust port (16); The rotating mechanism (17) is sealed and passes through the bottom wall (111), and the rotating mechanism (17) is used to drive the platform (12), the heat insulating member (13) and the material (2000) to be sintered above the bottom wall (111) to rotate; The rotary atmosphere sintering furnace (1000) further comprises a heat-insulated nitrogen inlet (18), The heat-insulating nitrogen inlet (18) is arranged through the peripheral wall (112) in the gap between the bottom wall (111) and the platform (12) in the vertical direction (D1). The heat-insulating nitrogen inlet (18) is used to pass nitrogen into the gap between the bottom wall (111) and the platform (12) in the vertical direction (D1), and the nitrogen passed into the portion of the closed cavity (S) above the heat-insulating member (13) via the gap between the platform (12) and the heat-insulating member (13) and the peripheral wall (112) in the horizontal direction (D2) to prevent heat provided by the heating component (15) of the rotary atmosphere sintering furnace (1000) from entering the gap between the bottom wall (111) and the platform (12) in the vertical direction (D1) via the gap between the platform (12) and the heat-insulating member (13) and the peripheral wall (112) in the horizontal direction (D2).

2. The rotary atmosphere sintering furnace according to claim 1, characterized in that: The top wall (113) is a component that can be detached from the peripheral wall (112).

3. The rotary atmosphere sintering furnace according to claim 1, characterized in that: The insulated nitrogen inlet (18) is provided in multiple configurations.

4. The rotary atmosphere sintering furnace according to claim 1, characterized in that: The rotating mechanism (17) includes a motor (171), a driven wheel (172), a connecting shaft (173), and a belt (174). The motor (171) is located below the bottom wall (111). The driven wheel (172) is located below the bottom wall (111) and is spaced apart and arranged side by side with the motor (171) in the horizontal direction (D2); The connecting shaft (173) is sealed and passes through the bottom wall (111) along the up-down direction (D1); the upper end of the connecting shaft (173) is fixedly connected to the platform (12) from the bottom, and the lower end of the connecting shaft (173) is fixedly connected to the driven wheel (172) from the top; The belt (174) is connected to the motor (171) and the driven wheel (172). The belt (174) is used to move under the rotation drive of the motor (171) to drive the driven wheel (172), the connecting shaft (173) and the platform (12) to rotate.

5. The rotary atmosphere sintering furnace according to claim 4, characterized in that: The rotary atmosphere sintering furnace (1000) further includes a bearing (19); The top of the inner ring (191) of the bearing (19) is fixedly connected to the platform (12) from below; The connecting shaft (173) is inserted into and fixedly connected to the inner ring (191) of the bearing (19).

6. The rotary atmosphere sintering furnace according to claim 5, characterized in that: The platform (12) is provided with a plug-in portion (121) extending downward; The plug-in portion (121) is inserted into the inner ring (191) of the bearing (19) from top to bottom and is fixed to the inner ring (191) of the bearing (19).

7. The rotary atmosphere sintering furnace according to claim 5, characterized in that: The top of the outer ring (192) of the bearing (19) is lower than the top of the inner ring (191) of the bearing (19), and the top of the outer ring (192) of the bearing (19) is spaced apart from the platform (12) in the up-down direction (D1); A ball (193) is provided between the inner ring (191) and the outer ring (192) of the bearing (19).

8. The rotary atmosphere sintering furnace according to claim 1, characterized in that: The rotary sintering gas condensation furnace also includes a circulating cooling water flow channel (20). The circulating cooling water flow channel (20) is arranged on the bottom wall (111), and the circulating cooling water flow channel (20) is used to cool and control the temperature of the bottom wall (111).

9. The rotary atmosphere sintering furnace according to claim 1, characterized in that: The rotary atmosphere sintering furnace (1000) further comprises a plurality of limiting columns (21), a plurality of supporting columns (22), a plurality of bases (23), and a plurality of sintering plates (24). A plurality of limiting columns (21) are respectively inserted into and fixed in the heat insulating member (13); the plurality of limiting columns (21) are spaced apart in the circumferential direction to form a plurality of accommodating spaces (C); and the limiting columns (21) in the same radial direction are spaced apart from each other in the circumferential direction; The corresponding support columns (22) are located between adjacent limiting columns (21) and are inserted into and fixed in the thermal insulation member (13); Each base (23) is located in a corresponding accommodating space (C), supported on a corresponding supporting column (22), and limited by corresponding limiting columns (21) on both sides of the circumference; Each sintering plate (24) is supported on a corresponding base (23) and is limited by corresponding limiting columns (21) on both sides in the circumferential direction. The top surface of each sintering plate (24) is used to support the material (2000) to be sintered.

10. The rotary atmosphere sintering furnace according to claim 9, characterized in that: In each accommodating space (C), the burning plates (24) on each base (23) are stacked up and down in a stack; The plurality of accommodating spaces (C) are arranged at intervals along a full circle of 360 degrees.

Images