Heat preservation device, single crystal furnace equipment and wrapping method of heat preservation device

Abstract

The invention provides a heat preservation device, single crystal furnace equipment and a wrapping method of the heat preservation device, and particularly relates to the technical field of single crystal furnace thermal fields. The heat preservation device comprises a heat preservation barrel, a first heat preservation layer and a second heat preservation layer. Wherein the first heat preservation layer is located on the outer side wall of the heat preservation barrel, and the first heat preservation layer and the heat preservation barrel are fixed. The inner surface of the second heat preservation layer is attached to the outer side wall of the first heat preservation layer, and the outer surface of the second heat preservation layer is cured. Thus, through the mode that the first heat preservation layer and the second heat preservation layer are matched to wrap the heat preservation barrel, the second heat preservation layer and the first heat preservation layer sequentially wrap the heat preservation barrel, the second heat preservation layer is cured, the first heat preservation layer can be evenly stressed, and therefore it is guaranteed that the first heat preservation layer is not damaged, and the heat preservation performance of the heat preservation device is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of single crystal furnace thermal field technology, and in particular to a heat preservation device, single crystal furnace equipment, and a wrapping method for the heat preservation device. Background Art

[0002] During the growth of a single crystal, the temperature distribution and heat transfer in the single crystal furnace are the single crystal furnace thermal field. It is understandable that a single crystal furnace is usually used to produce high-purity single crystal materials, such as silicon single crystals, which have important applications in the semiconductor and photovoltaic industries.

[0003] Among them, in the thermal field structure of the single crystal furnace, the insulation cylinder is an important insulation component. Its function is to provide an insulation system for the thermal field, reduce heat loss, and provide effective insulation to ensure the temperature uniformity and stability in the furnace, thereby affecting the efficiency and quality of the single crystal growth process.

[0004] However, in the existing insulation tube structure, the outside of the insulation tube is usually wrapped with graphite felt and fixed with metal clamps. There are generally some problems: First, the uneven fixation of the metal clamps may cause the graphite felt to be too tight in one area and too loose in another area, resulting in uneven insulation performance of the insulation tube. Second, due to the uneven stretching and fixation of the graphite felt, it may cause uneven heat distribution in the thermal field, thereby affecting the growth quality and efficiency of the single crystal material. Third, the outer side of the graphite felt may be deformed or damaged during use, and it needs to be replaced and maintained regularly. The maintenance cost is high, which increases the production cost. Summary of the invention

[0005] The embodiment of the present application provides a heat preservation device, a single crystal furnace device, and a wrapping method for the heat preservation device. The heat preservation cylinder is wrapped with the first heat preservation layer and the second heat preservation layer, so that the second heat preservation layer and the first heat preservation layer are wrapped in the heat preservation cylinder in sequence, and the second heat preservation layer is solidified to make the first heat preservation layer evenly stressed, thereby ensuring that the first heat preservation layer is not damaged and the heat preservation performance of the heat preservation device is guaranteed.

[0006] The first aspect of the present application provides a heat preservation device, comprising:

[0007] Insulation cylinder;

[0008] A first heat-insulating layer, the first heat-insulating layer is located on the outer wall of the heat-insulating cylinder, and the first heat-insulating layer and the heat-insulating cylinder are fixed;

[0009] The second thermal insulation layer has an inner surface that is in contact with the outer wall of the first thermal insulation layer, and an outer surface of the second thermal insulation layer is solidified.

[0010] The thermal insulation device provided in the first aspect of the embodiment of the present application includes a thermal insulation cylinder, a first thermal insulation layer and a second thermal insulation layer. The first thermal insulation layer is located on the outer wall of the thermal insulation cylinder, and the first thermal insulation layer and the thermal insulation cylinder are fixed. The inner surface of the second thermal insulation layer is in contact with the outer wall of the first thermal insulation layer, and the outer surface of the second thermal insulation layer is solidified. In this way, by combining the first thermal insulation layer and the second thermal insulation layer to wrap the thermal insulation cylinder, the second thermal insulation layer and the first thermal insulation layer are sequentially wrapped in the thermal insulation cylinder, and the curing treatment of the second thermal insulation layer can make the first thermal insulation layer evenly stressed, thereby ensuring that the first thermal insulation layer is not damaged and ensuring the thermal insulation performance of the thermal insulation device.

[0011] In a possible implementation, the thermal insulation cylinder is made of carbon-carbon composite material, the first thermal insulation layer is made of soft graphite felt, and the second thermal insulation layer is made of cured graphite felt.

[0012] In a possible implementation, the invention further includes: at least three first fasteners;

[0013] Each first fastener is arranged around the first insulation layer along the circumferential direction of the first insulation layer, and at least three first fasteners are arranged at intervals along the first direction, so that the first insulation layer and the insulation cylinder are fixedly connected through the first fasteners.

[0014] In a possible implementation, the invention further includes: at least four second fasteners;

[0015] Each second fastener is arranged around the second thermal insulation layer along the circumferential direction of the second thermal insulation layer, and at least four second fasteners are arranged at intervals along the first direction, so that the second thermal insulation layer and the first thermal insulation layer are fixedly connected through the second fasteners.

[0016] In a possible implementation, the second thermal insulation layer is spliced ​​and connected on the outer side wall of the first thermal insulation layer along the circumferential direction of the first thermal insulation layer.

[0017] In a possible implementation, the second thermal insulation layer includes a first connecting portion and a second connecting portion;

[0018] The first connection part has a first step structure, the second connection part has a second step structure, and the first step structure and the second step structure abut against each other, so that the first connection part and the second connection part are spliced ​​and connected.

[0019] A second aspect of the present application provides a single crystal furnace device, including: the above-mentioned insulation device.

[0020] The single crystal furnace equipment provided in the second aspect of the embodiment of the present application includes the above-mentioned heat preservation device. In this way, the heat preservation device is applied to the single crystal furnace equipment, and the heat preservation device has uniform heat preservation performance, which helps to maintain a stable thermal field environment, thereby improving the quality and consistency of products such as single crystal silicon. Not only does it improve the heat preservation efficiency and safety, it also helps to reduce costs and improve product quality.

[0021] A third aspect of the present application provides a method for wrapping a heat preservation device, the method comprising:

[0022] Providing a heat-insulating cylinder, a first heat-insulating layer and a second heat-insulating layer;

[0023] Attaching the first thermal insulation layer to the outer wall of the thermal insulation cylinder, and fixing the first thermal insulation layer and the thermal insulation cylinder;

[0024] The second thermal insulation layer is attached to the outer side wall of the first thermal insulation layer, and the second thermal insulation layer and the first thermal insulation layer are fixed.

[0025] The third aspect of the embodiment of the present application provides a method for wrapping a heat-insulating device, including providing a heat-insulating cylinder, a first heat-insulating layer, and a second heat-insulating layer; attaching the first heat-insulating layer to the outer wall of the heat-insulating cylinder, and fixing the first heat-insulating layer and the heat-insulating cylinder; attaching the second heat-insulating layer to the outer wall of the first heat-insulating layer, and fixing the second heat-insulating layer and the first heat-insulating layer. In this way, a method for wrapping a heat-insulating device is provided, the wrapping sequence of the heat-insulating cylinder, the first heat-insulating layer, and the second heat-insulating layer is determined, and a standardized wrapping process is adopted to ensure that the first heat-insulating layer and the second heat-insulating layer can be closely attached to the surface of the heat-insulating cylinder to avoid the generation of air gaps.

[0026] In a possible implementation, attaching the first thermal insulation layer to the outer side wall of the thermal insulation cylinder includes:

[0027] The first thermal insulation layer is evenly attached to the outer wall of the thermal insulation cylinder, and the thickness of each part of the thermal insulation layer wrapped around the thermal insulation cylinder is the same;

[0028] Fixing the first insulation layer and the insulation cylinder includes:

[0029] The first thermal insulation layer and the thermal insulation cylinder are fixed by molybdenum wire.

[0030] In a possible implementation, attaching the second thermal insulation layer to the outer side wall of the first thermal insulation layer includes:

[0031] The inner surface of the second thermal insulation layer is evenly attached to the outer wall of the first thermal insulation layer, and the outer surface of the second thermal insulation layer is cured;

[0032] Fixing the second thermal insulation layer to the first thermal insulation layer includes:

[0033] The second thermal insulation layer and the first thermal insulation layer are fixed by a metal clamp.

[0034] It should be understood that the second aspect and the third aspect of the present application correspond to the technical solution of the first aspect, and the beneficial effects achieved by each aspect and the corresponding feasible implementation methods are similar and will not be repeated here.

[0035] In addition to the technical problems solved by the present application, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of the technical solutions described above, other technical problems that can be solved by an insulation device, a single crystal furnace equipment, and a wrapping method for an insulation device provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments of the present application or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only part of the embodiments of the present application. These drawings and text descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application for those skilled in the art by referring to specific embodiments. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 A schematic cross-sectional view of a heat preservation device provided in an embodiment of the present application;

[0038] Figure 2 A schematic structural diagram of the heat preservation device provided in an embodiment of the present application from another angle;

[0039] Figure 3 A schematic flow chart of a wrapping method for a heat preservation device provided in an embodiment of the present application.

[0040] Description of reference numerals:

[0041] 100-heat preservation device;

[0042] 200-heat-insulating cylinder;

[0043] 300-first thermal insulation layer; 310-first fastener;

[0044] 400 - second insulation layer; 410 - second fastener; 420 - first connection portion; 421 - first step structure; 430 - second connection portion; 431 - second step structure. DETAILED DESCRIPTION

[0045] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0046] As described in the background technology, in the existing insulation tube structure, the outer side of the insulation tube is usually wrapped with graphite felt and fixed with a metal clamp. There are generally some problems: First, the uneven fixation of the metal clamp may cause the graphite felt to be too tight in one area and too loose in another area, resulting in uneven insulation performance of the insulation tube. Second, due to the uneven stretching and fixation of the graphite felt, it may cause uneven heat distribution in the thermal field, thereby affecting the growth quality and efficiency of the single crystal material. Third, the outer side of the graphite felt may be deformed or damaged during use, and it needs to be replaced and maintained regularly. The maintenance cost is high, which increases the production cost.

[0047] In response to the above technical problems, the thermal insulation device provided in the first aspect of the embodiment of the present application includes a thermal insulation cylinder, a first thermal insulation layer and a second thermal insulation layer. The first thermal insulation layer is located on the outer wall of the thermal insulation cylinder, and the first thermal insulation layer and the thermal insulation cylinder are fixed. The inner surface of the second thermal insulation layer is in contact with the outer wall of the first thermal insulation layer, and the outer surface of the second thermal insulation layer is solidified. In this way, the first thermal insulation layer and the second thermal insulation layer are combined to wrap the thermal insulation cylinder, so that the second thermal insulation layer and the first thermal insulation layer are sequentially wrapped in the thermal insulation cylinder, and the second thermal insulation layer is solidified to make the first thermal insulation layer evenly stressed, thereby ensuring that the first thermal insulation layer is not damaged and ensuring the thermal insulation performance of the thermal insulation device.

[0048] The single crystal furnace equipment provided in the second aspect of the embodiment of the present application includes the above-mentioned heat preservation device. In this way, the heat preservation device is applied to the single crystal furnace equipment, and the heat preservation device has uniform heat preservation performance, which helps to maintain a stable thermal field environment, thereby improving the quality and consistency of products such as single crystal silicon. Not only does it improve the heat preservation efficiency and safety, it also helps to reduce costs and improve product quality.

[0049] The third aspect of the embodiment of the present application provides a method for wrapping a heat-insulating device, including providing a heat-insulating cylinder, a first heat-insulating layer, and a second heat-insulating layer; attaching the first heat-insulating layer to the outer wall of the heat-insulating cylinder, and fixing the first heat-insulating layer and the heat-insulating cylinder; attaching the second heat-insulating layer to the outer wall of the first heat-insulating layer, and fixing the second heat-insulating layer and the first heat-insulating layer. In this way, a method for wrapping a heat-insulating device is provided, the wrapping sequence of the heat-insulating cylinder, the first heat-insulating layer, and the second heat-insulating layer is determined, and a standardized wrapping process is adopted to ensure that the first heat-insulating layer and the second heat-insulating layer can be closely attached to the surface of the heat-insulating cylinder to avoid the generation of air gaps.

[0050] In order to make the above-mentioned purposes, features and advantages of the embodiments of the present application more obvious and understandable, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of this application.

[0051] The embodiments of the present application provide a heat preservation device, a single crystal furnace device, and a wrapping method for the heat preservation device. The heat preservation cylinder is wrapped with the first heat preservation layer and the second heat preservation layer, so that the second heat preservation layer and the first heat preservation layer are wrapped in the heat preservation cylinder in sequence, and the second heat preservation layer is solidified to make the first heat preservation layer evenly stressed, thereby ensuring that the first heat preservation layer is not damaged and the heat preservation performance of the heat preservation device is guaranteed. The specific structure of a heat preservation device, a single crystal furnace device, and a wrapping method for the heat preservation device provided in the embodiments of the present application are introduced below in conjunction with the accompanying drawings.

[0052] refer to Figure 1 , the embodiment of the present application provides a heat preservation device 100 in the first aspect. Among them, the heat preservation device 100 may include a heat preservation cylinder 200, a first heat preservation layer 300 and a second heat preservation layer 400. In the embodiment of the present application, the heat preservation cylinder 200, the first heat preservation layer 300 and the second heat preservation layer 400 may all be cylindrical structures, and the embodiment of the present application is not limited here. Among them, the first heat preservation layer 300 may be located on the outer side wall of the heat preservation cylinder 200, and the first heat preservation layer 300 may be fixed to the heat preservation cylinder 200. Accordingly, the inner surface of the second heat preservation layer 400 may be in contact with the outer side wall of the first heat preservation layer 300, and the outer surface of the second heat preservation layer 400 may be cured, so as to have good rigidity and stability. In this way, by combining the first insulation layer 300 and the second insulation layer 400 to wrap the insulation cylinder 200, the second insulation layer 400 and the first insulation layer 300 can be wrapped in the insulation cylinder 200 in sequence. The curing treatment of the second insulation layer 400 can make the force applied to the first insulation layer 300 more uniform, so that the first insulation layer 300 is evenly stressed, thereby ensuring that the first insulation layer 300 is not damaged and the insulation performance of the insulation device 100 is guaranteed.

[0053] On the basis of the above embodiments, in the embodiments of the present application, illustratively, the heat-insulating cylinder 200 can be made of carbon-carbon composite material, which has high mechanical strength and temperature resistance. The first heat-insulating layer 300 can be made of soft graphite felt. It can be understood that as a heat-insulating material, soft graphite felt can have good heat-insulating performance and heat-shock resistance. The second heat-insulating layer 400 can be made of cured graphite felt, which has high strength and temperature resistance. The embodiments of the present application are not limited here.

[0054] Continue to refer Figure 1 On the basis of the above embodiment, the heat preservation device 100 may further include: a first fastener 310. In one possible implementation, the number of the first fasteners 310 may be at least three, and the embodiment of the present application does not limit the number of the first fasteners 310. In the embodiment of the present application, an example is given with three first fasteners 310. Each first fastener 310 may be arranged around the first heat preservation layer 300 along the circumferential direction of the first heat preservation layer 300, so that each first fastener 310 is circularly arranged around the first heat preservation layer 300. And the three first fasteners 310 may be arranged at intervals along the first direction and evenly distributed on the outer surface of the first heat preservation layer 300, so that the first heat preservation layer 300 and the heat preservation cylinder 200 can be fixedly connected by the first fasteners 310. In this way, by setting the first fastener 310, the first insulation layer 300 and the insulation cylinder 200 can be tightly fitted, avoiding the first insulation layer 300 being fixed too tightly or too loosely, thereby affecting the insulation effect of the insulation device 100 and causing damage to the first insulation layer 300 and the insulation cylinder 200.

[0055] On the basis of the above embodiment, illustratively, the first fastener 310 can be a molybdenum wire, which has good high temperature resistance. In a possible implementation, the height dimension of the insulation cylinder 200 can be 530 mm, and the height dimension of the first insulation layer 300 is the same as that of the insulation cylinder 200, so as to ensure that the top and bottom of the first insulation layer 300 are flush with the insulation cylinder 200, and ensure that the first insulation layer 300 can completely cover the outer wall of the insulation cylinder 200. One of the molybdenum wires can be located at a height position of 150-200 mm from the bottom of the first insulation layer 300 to the top, so that the molybdenum wire is at one third of the height of the first insulation layer 300. The other two molybdenum wires can be arranged in sequence on one side of the molybdenum wire, and the distance between the three molybdenum wires can be almost the same, so that the three molybdenum wires can be evenly distributed on the outer surface of the first insulation layer 300, thereby achieving the fixation between the first insulation layer 300 and the insulation cylinder 200.

[0056] refer to Figure 1 as well as Figure 2On the basis of the above embodiment, the heat preservation device 100 may further include: a second fastener 410. In one possible implementation, the number of the second fasteners 410 may be at least four, and the embodiment of the present application does not limit the number of the second fasteners 410. In the embodiment of the present application, an example is given with the number of the second fasteners 410 being four. Each second fastener 410 may be arranged around the second heat preservation layer 400 along the circumferential direction of the second heat preservation layer 400, so that each second fastener 410 is circularly arranged around the second heat preservation layer 400. At least four second fasteners 410 may be arranged at intervals along the first direction and evenly distributed on the outer surface of the second heat preservation layer 400, so that the second heat preservation layer 400 and the first heat preservation layer 300 can be fixedly connected by the second fasteners 410. In this way, by setting the second fastener 410, the second insulation layer 400 and the first insulation layer 300 can be tightly fitted, so that there is no gap between the second insulation layer 400 and the first insulation layer 300, thereby improving the insulation effect of the insulation device 100 and avoiding looseness between the second insulation layer 400 and the first insulation layer 300 to cause thermal field damage.

[0057] Continue to refer Figure 1 as well as Figure 2 , based on the above embodiment, illustratively, the second fastener 410 can be a metal clamp, which also has good high temperature resistance. In a possible implementation, the height dimension of the second thermal insulation layer 400 can be 530 mm, ensuring that the second thermal insulation layer 400 can completely cover the outer wall of the first thermal insulation layer 300. One of the metal clamps can be located at a height of 120-150 mm from the bottom of the second thermal insulation layer 400 toward the top, so that the metal clamp is at one quarter of the height of the first thermal insulation layer 300. The other three metal clamps can be arranged in sequence at intervals on one side of the metal clamp, and the distances between the four metal clamps can be almost the same, so that the four metal clamps can be evenly distributed on the outer surface of the second thermal insulation layer 400, thereby achieving fixation between the second thermal insulation layer 400 and the first thermal insulation layer 300.

[0058] Continue to refer Figure 2 On the basis of the above embodiment, the second insulation layer 400 can be spliced ​​and connected on the outer wall of the first insulation layer 300 along the circumferential direction of the first insulation layer 300, so that the second insulation layer 400 can be completely covered on the outer wall of the first insulation layer 300 by splicing and connecting, further ensuring that the second insulation layer 400, the first insulation layer 300 and the insulation cylinder 200 are tightly fitted.

[0059] Continue to refer Figure 2On the basis of the above embodiment, further, the second thermal insulation layer 400 may include a first connection part 420 and a second connection part 430. In one possible implementation, the first connection part 420 may have a first step structure 421, and correspondingly, the second connection part 430 may have a second step structure 431, and the first step structure 421 may be adapted to the second step structure 431. In this way, the first step structure 421 may abut against the second step structure 431, so that the first connection part 420 and the second connection part 430 are spliced ​​and connected.

[0060] In a second aspect, the embodiment of the present application provides a single crystal furnace device (not shown in the figure). The single crystal furnace device may include the above-mentioned heat preservation device 100. In this way, the heat preservation device 100 can be applied to the single crystal furnace device. Since the heat preservation device 100 provided in the embodiment of the present application has a uniform heat preservation performance, it helps the single crystal furnace device to maintain a stable thermal field environment, thereby improving the quality and consistency of products such as single crystal silicon. In this way, not only the heat preservation efficiency and safety of the single crystal furnace device are improved, but also it helps to reduce costs and improve product quality.

[0061] refer to Figure 3 In a third aspect, the embodiment of the present application provides a wrapping method for a heat preservation device 100. The wrapping method may include providing a heat preservation cylinder 200, a first heat preservation layer 300, and a second heat preservation layer 400; attaching the first heat preservation layer 300 to the outer wall of the heat preservation cylinder 200, and fixing the first heat preservation layer 300 and the heat preservation cylinder 200; attaching the second heat preservation layer 400 to the outer wall of the first heat preservation layer 300, and fixing the second heat preservation layer 400 and the first heat preservation layer 300.

[0062] Figure 3 A schematic diagram of a wrapping method of a heat preservation device 100 provided in an embodiment of the present application, referring to Figure 3 As shown, a method for wrapping a heat preservation device 100 provided in an embodiment of the present application includes:

[0063] S301 , providing a heat-insulating cylinder 200 , a first heat-insulating layer 300 , and a second heat-insulating layer 400 .

[0064] In an embodiment of the present application, providing an insulation cylinder 200 may include providing an insulation cylinder 200 made of a carbon-carbon composite material, providing a first insulation layer 300 may include providing a first insulation layer 300 made of soft graphite felt, and providing a second insulation layer 400 may include providing a second insulation layer 400 made of cured graphite felt.

[0065] S302 , attaching the first thermal insulation layer 300 to the outer wall of the thermal insulation cylinder 200 , and fixing the first thermal insulation layer 300 and the thermal insulation cylinder 200 .

[0066] In the embodiment of the present application, the first thermal insulation layer 300 is attached to the outer wall of the thermal insulation cylinder 200. The thermal insulation cylinder 200 is first cleaned to remove the residue on the surface of the thermal insulation cylinder 200 to enhance the adhesion of the first thermal insulation layer 300, and then the first thermal insulation layer 300 of a suitable size is cut according to the size of the thermal insulation cylinder 200 to ensure that the first thermal insulation layer 300 can completely cover the outer surface of the thermal insulation cylinder 200, thereby achieving the initial wrapping of the first thermal insulation layer 300.

[0067] Furthermore, the first insulation layer 300 is evenly wrapped around the outer wall of the insulation cylinder 200, and the thickness of the first insulation layer 300 is kept consistent at every location to avoid wrinkles and gaps between the first insulation layer 300 and the insulation cylinder 200, thereby ensuring that the first insulation layer 300 can fit tightly against the outer surface of the insulation cylinder 200.

[0068] In the embodiment of the present application, fixing the first thermal insulation layer 300 and the thermal insulation cylinder 200 may include fixing the first thermal insulation layer 300 and the thermal insulation cylinder 200 by molybdenum wires. Three molybdenum wires are used to preliminarily fix the first thermal insulation layer 300 and the thermal insulation cylinder 200, one of which is located in the middle of the outer surface of the first thermal insulation layer 300, and the other two molybdenum wires are located between the top and the bottom of the outer surface of the first thermal insulation layer 300, avoiding too tight or too loose fixing methods to avoid affecting the thermal insulation effect or causing damage to the first thermal insulation layer 300.

[0069] S303 , attaching the second thermal insulation layer 400 to the outer wall of the first thermal insulation layer 300 , and fixing the second thermal insulation layer 400 and the first thermal insulation layer 300 .

[0070] In the embodiment of the present application, the second insulation layer 400 is attached to the outer side wall of the first insulation layer 300. The inner side wall of the second insulation layer 400 can be attached to the first insulation layer 300, and the second insulation layer 400 can make the force applied to the first insulation layer 300 more uniform, so that there is no gap between the second insulation layer 400 and the first insulation layer 300, so as to improve the overall insulation effect of the insulation device 100. The outer side wall of the first insulation layer 300 is effectively protected to avoid damage to the first insulation layer 300 due to uneven force or high temperature environment, while improving the insulation performance of the insulation device 100, reducing energy consumption, and extending the service life of the first insulation layer 300.

[0071] In the embodiment of the present application, fixing the second thermal insulation layer 400 and the first thermal insulation layer 300 may include fixing the second thermal insulation layer 400 and the first thermal insulation layer 300 by metal clamps. Four metal clamps are used to fix the second thermal insulation layer 400 and the first thermal insulation layer 300, and the four metal clamps are divided into four equal parts on the outer surface of the second thermal insulation layer 400, so as to ensure that the second thermal insulation layer 400, the first thermal insulation layer 300 and the thermal insulation cylinder 200 are closely fitted to avoid looseness resulting in thermal field damage and reduced thermal insulation.

[0072] In the embodiment of the present application, after the second insulation layer 400 and the first insulation layer 300 are fixed, the overall insulation effect of the insulation device 100 is checked to ensure that there are no leakage hot spots. In addition, the insulation device 100 is regularly inspected and maintained to promptly detect and replace damaged first insulation layer 300 and second insulation layer 400.

[0073] In an embodiment of the present application, a wrapping method for an insulation device 100 is provided, a wrapping order of the insulation cylinder 200, the first insulation layer 300 and the second insulation layer 400 is determined, and a streamlined wrapping process is adopted to ensure that the first insulation layer 300 and the second insulation layer 400 can fit tightly to the surface of the insulation cylinder 200 to avoid the generation of air gaps.

[0074] In the embodiment of the present application, it can be understood that the uniform wrapping of the second insulation layer 400 ensures that the insulation performance of the first insulation layer 300 is evenly distributed to avoid local overheating or overcooling. The second insulation layer 400 provides additional protection, thereby protecting the first insulation layer 300 from being stretched or damaged, and extending the service life of the insulation material. The fixing effect of the second insulation layer 400 can prevent the first insulation layer 300 from deforming under high temperature and pressure. The use of the second insulation layer 400 also improves the thermal stability of the overall insulation structure and reduces heat loss caused by temperature fluctuations. The combination of the second insulation layer 400 and the first insulation layer 300 provides a better thermal insulation effect and reduces the loss of heat through conduction and radiation. Due to the protective effect of the second insulation layer 400, it is easier to maintain and replace the first insulation layer 300. By reducing energy consumption and extending the service life of insulation materials, production costs can be reduced. Uniform insulation performance helps to maintain a stable thermal field environment, thereby improving the quality and consistency of products such as single crystals.

[0075] The various embodiments or implementation methods in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0076] It should be noted that the phrases "in specific implementation", "in some embodiments", "in this embodiment", "exemplarily" and the like mentioned in the specification indicate that the described embodiment may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing specific features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments that are explicitly or not explicitly described.

[0077] In general, terms should be understood, at least in part, by the context in which they are used. For example, the term "one or more" as used herein may be used to describe any feature, structure, or characteristic in a singular sense, or may be used to describe a combination of features, structures, or characteristics in a plural sense, depending, at least in part, on the context. Similarly, terms such as "a," "an," or "the" may also be understood to convey singular usage or to convey plural usage, depending, at least in part, on the context.

[0078] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0079] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0080] Finally, it should be noted that those skilled in the art will readily conceive of other embodiments of the present invention after considering the specification and practicing the invention disclosed herein. The present invention is intended to cover any variations, uses or adaptations of the present invention, which follow the general principles of the present invention and include common knowledge or customary technical means in the art not disclosed by the present invention, are not limited to the precise structure described above and shown in the drawings, and may be modified and changed in various ways without departing from the scope thereof. The scope of the present invention is limited only by the appended claims.

Claims

1. A heat preservation device, characterized in that: include: Insulation cylinder; A first heat-insulating layer, wherein the first heat-insulating layer is located on the outer wall of the heat-insulating cylinder, and the first heat-insulating layer and the heat-insulating cylinder are fixed; A second thermal insulation layer, wherein the inner surface of the second thermal insulation layer is in contact with the outer wall of the first thermal insulation layer, and the outer surface of the second thermal insulation layer is cured.

2. The heat preservation device according to claim 1, characterized in that: The thermal insulation cylinder is made of carbon-carbon composite material, the first thermal insulation layer is made of soft graphite felt, and the second thermal insulation layer is made of cured graphite felt.

3. The heat preservation device according to claim 2, characterized in that: Also includes: at least three first fasteners; Each of the first fasteners is arranged around the first thermal insulation layer along the circumferential direction of the first thermal insulation layer, and at least three of the first fasteners are arranged at intervals along the first direction, so that the first thermal insulation layer and the thermal insulation cylinder are fixedly connected through the first fasteners.

4. The heat preservation device according to claim 3, characterized in that: Also includes: at least four second fasteners; Each second fastener is arranged around the second thermal insulation layer along the circumferential direction of the second thermal insulation layer, and at least four second fasteners are arranged at intervals along the first direction, so that the second thermal insulation layer and the first thermal insulation layer are fixedly connected through the second fasteners.

5. The heat preservation device according to any one of claims 1 to 4, characterized in that: The second thermal insulation layer is spliced ​​and connected on the outer side wall of the first thermal insulation layer along the circumferential direction of the first thermal insulation layer.

6. The heat preservation device according to claim 5, characterized in that: The second thermal insulation layer includes a first connecting portion and a second connecting portion; The first connection portion has a first step structure, the second connection portion has a second step structure, and the first step structure and the second step structure abut against each other so that the first connection portion and the second connection portion are spliced ​​and connected.

7. A single crystal furnace device, characterized in that: include: The heat preservation device according to any one of claims 1 to 6 above.

8. A method for wrapping a heat preservation device, characterized in that: The packaging method comprises: Providing a heat-insulating cylinder, a first heat-insulating layer and a second heat-insulating layer; Attaching the first thermal insulation layer to the outer wall of the thermal insulation cylinder, and fixing the first thermal insulation layer and the thermal insulation cylinder; The second thermal insulation layer is attached to the outer side wall of the first thermal insulation layer, and the second thermal insulation layer and the first thermal insulation layer are fixed.

9. The method for wrapping a heat preservation device according to claim 8, characterized in that: The step of attaching the first heat-insulating layer to the outer wall of the heat-insulating cylinder comprises: The first heat-insulating layer is evenly attached to the outer wall of the heat-insulating cylinder, and the thickness of each part where the first heat-insulating layer wraps the heat-insulating cylinder is the same; The fixing of the first heat-insulating layer and the heat-insulating cylinder comprises: The first heat-insulating layer and the heat-insulating cylinder are fixed by molybdenum wire.

10. The method for wrapping a heat preservation device according to claim 9, characterized in that: The step of attaching the second thermal insulation layer to the outer side wall of the first thermal insulation layer comprises: The inner surface of the second thermal insulation layer is evenly attached to the outer side wall of the first thermal insulation layer, and the outer surface of the second thermal insulation layer is cured; The fixing of the second thermal insulation layer and the first thermal insulation layer comprises: The second thermal insulation layer and the first thermal insulation layer are fixed by a metal clamp.

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