An on-line serviceable gap ceramic ball insulation structure for a thermal field of vapor deposition

Abstract

The utility model discloses a kind of on-line maintenance gap type ceramic ball insulation structures for vapor deposition hot field, belong to carbon-carbon composite material preparation equipment technical field, including the heater for providing high-temperature environment, heat insulation felt and graphite electrode for wrapping heater, insulation structure is installed between heat insulation felt and graphite electrode, including coaxially arranged inner ceramic ring and outer ceramic ring, the outer ceramic ring is sleeved in the outside of inner ceramic ring, annular gap is equipped between the inner ceramic ring outer wall and outer ceramic ring inner wall, the lower portion of the inner ceramic ring and outer ceramic ring is equipped with step structure;Still including ceramic ball filled in the annular gap between the inner ceramic ring and outer ceramic ring, the ceramic ball is equipped with several, and the diameter D of the ceramic ball is greater than the width L1 of annular gap, the utility model has the technical effect that insulation performance is reliable, prevent short circuit, heat loss is small and can on-line restore insulation performance, on-line maintenance.

Description

Technical Field

[0001] This utility model belongs to the technical field of carbon-carbon composite material preparation equipment, and particularly relates to an online maintainable gap-type ceramic ball insulation structure for vapor deposition thermal fields. Background Technology

[0002] In the vapor deposition process of carbon-carbon composite materials, the thermal insulation structure is a core component. Traditional integral ceramic insulators are prone to short circuits due to conductive paths formed by carbon deposition; gap insulation methods result in significant heat loss due to thermal convection and radiation, increasing energy consumption. Therefore, there is an urgent need for an insulation structure that offers reliable insulation performance, low heat loss, and ease of maintenance. Utility Model Content

[0003] To address the problems existing in the prior art, this utility model provides an online maintainable gap-type ceramic ball insulation structure for vapor deposition thermal fields. It has the advantages of reliable insulation performance, prevention of short circuits, low heat loss, online restoration of insulation performance, and online maintenance. It solves the problems of easy short circuits in integral ceramic insulation components, large heat loss of gap insulation, and the need to dismantle the furnace for maintenance in the prior art.

[0004] This invention is implemented as follows: an online maintainable gap-type ceramic ball insulation structure for a vapor deposition thermal field includes a heater for providing a high-temperature environment, an insulating felt surrounding the heater, and a graphite electrode. The insulation structure is installed between the insulating felt and the graphite electrode and includes an inner ceramic ring and an outer ceramic ring arranged coaxially. The outer ceramic ring is sleeved outside the inner ceramic ring. An annular gap is provided between the outer wall of the inner ceramic ring and the inner wall of the outer ceramic ring. The lower part of the inner and outer ceramic rings has a stepped structure for positioning and maintaining the width L1 of the annular gap constant. It also includes ceramic balls filling the annular gap between the inner and outer ceramic rings. There are several ceramic balls, and the diameter D of the ceramic balls is greater than the width L1 of the annular gap.

[0005] As a preferred embodiment of the present invention, the stepped structure includes an inner ring step formed on the lower part of the outer wall of the inner ceramic ring, the upper surface of which is used to support the ceramic ball, and an outer ring step formed on the lower part of the inner wall of the outer ceramic ring and adapted to the inner ring step, wherein the inner sidewall of the outer ring step and the outer wall of the inner ceramic ring are used to define the annular gap.

[0006] This setting allows for precise positioning of the relative positions of the inner and outer ceramic rings, ensuring a uniform and consistent gap width between the rings. This prevents the ceramic balls from falling off and guarantees stable insulation and heat preservation performance, thus solving the performance fluctuation problem caused by assembly misalignment.

[0007] In a preferred embodiment of this invention, the width L1 of the annular gap between the inner and outer ceramic rings is 6-10 mm, and the diameter D of the ceramic ball is 7-11 mm, satisfying D>L1.

[0008] This design allows the ceramic balls to be stably held in the gap to form an effective accumulation, while also providing space for rolling to facilitate maintenance and agitation. It adapts to different thermal field size requirements and prevents the filler from falling off or getting stuck.

[0009] In a preferred embodiment of this invention, the width L1 of the annular gap between the inner and outer ceramic rings is 8 mm, and the diameter D of the ceramic ball is 9 mm.

[0010] This design achieves an optimal balance between insulation performance and heat preservation effect, improves the rolling flexibility of the ceramic balls, and makes it easier to break the carbon film during maintenance, further enhancing structural reliability and maintenance efficiency.

[0011] As a preferred embodiment of this invention, the inner ceramic ring and the outer ceramic ring are made of high-temperature insulating ceramic material, and the material is selected from alumina, silicon nitride or reaction-sintered silicon carbide.

[0012] This design ensures stable insulation performance and structural strength in high-temperature thermal environments, resists carbon deposition corrosion, extends service life, and solves the problem of performance degradation of traditional materials at high temperatures.

[0013] As a preferred embodiment of this invention, the ceramic ball is a zirconia ceramic ball or a silicon carbide ceramic ball.

[0014] This design utilizes the high hardness and wear resistance of the material to reduce wear caused by long-term agitation, while the low thermal conductivity enhances the insulation effect and prevents filler loss from affecting structural stability.

[0015] As a preferred embodiment of this invention, it also includes an insulating rod for insertion into the annular gap between the inner and outer ceramic rings. When the insulation performance of the ceramic ball decreases due to the formation of a carbon film on the surface of the ceramic ball caused by carbon deposition, the insulating rod is inserted through the maintenance hole on the side wall of the vapor deposition furnace to agitate the ceramic ball in the annular gap.

[0016] This setup allows for relative rolling and displacement between the ceramic balls, thereby scraping and breaking the deposited carbon film on the surface, disconnecting potential conductive paths, breaking the conductive carbon film on the surface of the ceramic balls online, and quickly restoring insulation performance without dismantling the furnace or stopping the machine. This significantly improves equipment utilization and solves the problem of production interruption required for maintenance of traditional structures.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows: Excellent short-circuit protection: The ceramic ball point contact structure combined with online stirring maintenance can effectively prevent carbon deposition from forming a continuous conductive bridge, ensuring the reliability of thermal field insulation.

[0018] Outstanding thermal insulation performance: The ceramic ball stack significantly reduces heat convection and radiation loss, greatly improving the thermal insulation effect compared to air gaps and saving process energy consumption.

[0019] Online maintenance is possible: insulation performance can be restored by simply stirring with an insulating rod without disassembling the furnace body, thus extending the service life of the equipment and improving production efficiency.

[0020] Easy and reliable installation: The stepped structure ensures precise positioning of the inner and outer ceramic rings, and the overall structure is stable, making it easy to assemble in the hot zone of the vapor deposition furnace. Attached Figure Description

[0021] Figure 1 This is an overall schematic diagram of the insulation structure provided in this embodiment of the utility model; Figure 2 This is a schematic diagram of the internal structure provided in an embodiment of the present utility model; Figure 3 This is a schematic diagram of the uninstalled insulation structure provided in an embodiment of this utility model.

[0022] In the diagram: 1. Graphite electrode; 3. Insulation felt; 5. Inner ceramic ring; 6. Outer ceramic ring; 7. Ceramic ball. Detailed Implementation

[0023] To further understand the utility model content, features and effects of this utility model, the following embodiments are provided, and detailed descriptions are given in conjunction with the accompanying drawings.

[0024] The structure of this utility model will now be described in detail with reference to the accompanying drawings.

[0025] refer to Figures 1 to 3 As shown in the figure, this utility model provides an online maintainable gap-type ceramic ball insulation structure for a vapor deposition thermal field, including a heater for providing a high-temperature environment, an insulation felt 3 for wrapping the heater, and a graphite electrode 1. The insulation structure is installed between the insulation felt 3 and the graphite electrode 1, including an inner ceramic ring 5 and an outer ceramic ring 6 arranged coaxially. The outer ceramic ring 6 is sleeved outside the inner ceramic ring 5. An annular gap is provided between the outer wall of the inner ceramic ring 5 and the inner wall of the outer ceramic ring 6. The lower part of the inner ceramic ring 5 and the outer ceramic ring 6 is provided with a stepped structure for positioning and maintaining the width L1 of the annular gap constant. It also includes ceramic balls 7 filling the annular gap between the inner ceramic ring 5 and the outer ceramic ring 6. There are a plurality of ceramic balls 7, and the diameter D of the ceramic balls 7 is greater than the width L1 of the annular gap.

[0026] Specifically, the stepped structure includes an inner ring step formed on the lower part of the outer wall of the inner ceramic ring 5, the upper surface of which is used to support the ceramic ball 7, and an outer ring step formed on the lower part of the inner wall of the outer ceramic ring 6 and adapted to the inner ring step, wherein the inner sidewall of the outer ring step and the outer wall of the inner ceramic ring 5 are used to define the annular gap.

[0027] By adopting the above solution, the relative positions of the inner and outer ceramic rings 6 can be accurately located, ensuring that the ring gap width is uniform and consistent. This not only prevents the ceramic ball 7 from falling off, but also ensures stable insulation and heat preservation performance, thus solving the performance fluctuation problem caused by assembly misalignment.

[0028] Specifically, the width L1 of the annular gap between the inner ceramic ring 5 and the outer ceramic ring 6 is 8 mm, and the diameter D of the ceramic ball 7 is 9 mm.

[0029] The above solution not only allows the ceramic balls 7 to be stably stuck in the gap to form an effective accumulation, but also reserves rolling space for easy maintenance and stirring. It adapts to different thermal field size requirements, avoids the filling material falling off or getting stuck, and achieves the optimal balance between insulation performance and heat preservation effect. The ceramic balls 7 have better rolling flexibility and are easier to break the carbon film during maintenance, further improving structural reliability and maintenance efficiency.

[0030] Specifically, the inner ceramic ring 5 and the outer ceramic ring 6 are made of high-temperature insulating ceramic material, and the material is selected from alumina.

[0031] By adopting the above solution, stable insulation performance and structural strength are ensured in high-temperature thermal fields, resistance to carbon deposition corrosion is achieved, service life is extended, and the problem of performance degradation of traditional materials at high temperatures is solved.

[0032] Specifically, the ceramic ball 7 is a zirconia ceramic ball 7.

[0033] By adopting the above solution, the high hardness and wear resistance of the material can be used to reduce wear caused by long-term agitation. At the same time, the low thermal conductivity can enhance the insulation effect and avoid the loss of filler components from affecting the structural stability.

[0034] Specifically, it also includes an insulating rod for insertion into the annular gap between the inner ceramic ring 5 and the outer ceramic ring 6. When the insulation performance of the ceramic ball 7 decreases due to the formation of a carbon film on the surface of the ceramic ball 7 by carbon deposition, the insulating rod is inserted through the maintenance hole on the side wall of the vapor deposition furnace to stir the ceramic ball 7 in the annular gap.

[0035] By adopting the above scheme, relative rolling and displacement are generated between the ceramic balls 7, thereby scraping and breaking the deposited carbon film on the surface, disconnecting potential conductive paths, breaking the conductive carbon film on the surface of the ceramic balls 7 online, quickly restoring insulation performance, without dismantling the furnace and stopping the machine, significantly improving equipment utilization, and solving the problem of production interruption required for maintenance of traditional structures.

[0036] The working principle of this utility model: When in use, the insulation principle is as follows: the inner and outer ceramic rings 6 have high-temperature insulation properties. The ceramic balls 7 in the annular gap have a diameter larger than the gap width, forming a point contact stacking structure. Under this structure, even if a carbon film is formed on the surface of the ceramic balls 7 due to carbon deposition, it is difficult to form a continuous conductive path, thereby effectively avoiding insulation short circuit. Insulation principle: The ceramic spheres 7 are packed together to fill the annular gap. Compared with air gaps, this can significantly suppress heat convection and heat radiation, reduce heat loss through the gap, improve the thermal insulation efficiency, and reduce process energy consumption. Online maintenance principle: During the vapor deposition process, carbon produced by the pyrolysis of the carbon source gas will be deposited on the surface of ceramic balls 7 to form a carbon film. Long-term operation may cause local carbon film connection. At this time, an insulating rod is inserted through the maintenance hole on the side wall of the furnace body to stir the ceramic balls 7 in the annular gap, so that the ceramic balls 7 generate relative rolling and displacement, thereby scraping and breaking the deposited carbon film on the surface, disconnecting the potential conductive path, restoring the insulation performance, and realizing online maintenance without dismantling the furnace.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An online maintainable gap-type ceramic ball insulation structure for a vapor deposition thermal field, comprising a heater for providing a high-temperature environment, an insulating felt (3) enclosing the heater, and a graphite electrode (1), wherein the insulation structure is installed between the insulating felt (3) and the graphite electrode (1), characterized in that: It includes an inner ceramic ring (5) and an outer ceramic ring (6) arranged coaxially. The outer ceramic ring (6) is sleeved on the outside of the inner ceramic ring (5). An annular gap is provided between the outer wall of the inner ceramic ring (5) and the inner wall of the outer ceramic ring (6). The lower part of the inner ceramic ring (5) and the outer ceramic ring (6) is provided with a stepped structure for positioning and keeping the width L1 of the annular gap constant. It also includes ceramic balls (7) filling the annular gap between the inner ceramic ring (5) and the outer ceramic ring (6), wherein there are a plurality of ceramic balls (7), and the diameter D of the ceramic balls (7) is greater than the width L1 of the annular gap.

2. The online maintainable gap-type ceramic ball insulation structure for vapor deposition thermal fields as described in claim 1, characterized in that: The stepped structure includes an inner ring step formed on the lower part of the outer wall of the inner ceramic ring (5) and the upper surface of the inner ring step is used to support the ceramic ball (7), and an outer ring step formed on the lower part of the inner wall of the outer ceramic ring (6) and adapted to the inner ring step, and the inner sidewall of the outer ring step and the outer wall of the inner ceramic ring (5) are used to define the annular gap.

3. The online maintainable gap-type ceramic ball insulation structure for vapor deposition thermal fields as described in claim 1, characterized in that: The width L1 of the annular gap between the inner ceramic ring (5) and the outer ceramic ring (6) is 6-10 mm, and the diameter D of the ceramic ball (7) is 7-11 mm, satisfying D>L1.

4. The online maintainable gap-type ceramic ball insulation structure for vapor deposition thermal fields as described in claim 3, characterized in that: The width L1 of the annular gap between the inner ceramic ring (5) and the outer ceramic ring (6) is 8 mm, and the diameter D of the ceramic ball (7) is 9 mm.

5. The online maintainable gap-type ceramic ball insulation structure for vapor deposition thermal fields as described in claim 1, characterized in that: The inner ceramic ring (5) and the outer ceramic ring (6) are made of high-temperature insulating ceramic material, and the material is alumina, silicon nitride or reaction sintered silicon carbide.

6. The online maintainable gap-type ceramic ball insulation structure for vapor deposition thermal fields as described in claim 1, characterized in that: The ceramic ball (7) is a zirconia ceramic ball (7) or a silicon carbide ceramic ball (7).

7. The online maintainable gap-type ceramic ball insulation structure for vapor deposition thermal fields as described in claim 1, characterized in that: It also includes an insulating rod for inserting into the annular gap between the inner ceramic ring (5) and the outer ceramic ring (6). When the insulation performance of the ceramic ball (7) decreases due to the formation of a carbon film on the surface of the ceramic ball (7) by carbon deposition, the insulating rod is inserted through the maintenance hole on the side wall of the vapor deposition furnace to stir the ceramic ball (7) in the annular gap.

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