High-temperature hot box, preparation method of heating unit of high-temperature hot box and false twist texturing machine

Abstract

The embodiment of the invention provides a high-temperature hot box, a preparation method of a heating unit of the high-temperature hot box and a false twist texturing machine. The preparation method comprises the following steps: carrying out ceramic treatment on a carbon-carbon composite material to generate a ceramic carbon-carbon composite material; a heating part of the heating unit is made of the ceramic carbon-carbon composite material; a supporting part of the heating unit is made of high-temperature-resistant metal; and the heat source, the supporting part and the heating part of the heating unit are fixed through the fixing part, so that at least one part of the heat source is fixed between the supporting part and the heating part in the first direction and makes contact with the heating part. Through the embodiment of the invention, the cost of the heating unit of the high-temperature hot box can be reduced, the heat conduction efficiency can be improved, meanwhile, the oxidation resistance of the heating unit is enhanced, and the purpose of high-temperature self-cleaning can be achieved, so that the labor cost and the cleaning time are saved, and the production efficiency is improved.

Description

Technical Field

[0001] Embodiments of the present application relate to the field of textile equipment, and in particular, to a high-temperature hot box, a preparation method for a heating unit of the high-temperature hot box, and a false-twist texturing machine. Background Art

[0002] In the existing textile industry, a false-twist texturing machine is a unit for increasing the elasticity of formed yarn. During the process of increasing the elasticity of the yarn, it is necessary to heat the yarn by using the high-temperature hot box of the false-twist texturing machine. Currently, the heating unit for heating the yarn in the high-temperature hot box is usually made of aluminum bronze, and the heat from the heat source (heating rod) is transferred to the yarn passing through the heating unit through the heat conduction ability of the aluminum bronze, so as to heat the yarn.

[0003] It should be noted that the above introduction of the background art is only for the convenience of clearly and completely explaining the technical solutions of the present application and facilitating the understanding of those skilled in the art. It cannot be considered that the above technical solutions are well-known to those skilled in the art just because these solutions are described in the background art part of the present application. Summary of the Invention

[0004] The inventors found that in the above existing heating method, the cost of the aluminum bronze used in the heating unit is relatively high and the heat conduction ability is not very strong; and, due to the breakage of the yarn during the heating of the yarn, the splashing of the grease of the yarn, and the copper green generated by the weak antioxidant property of the aluminum bronze during the heating process (for example, 500°C), etc., it is necessary to clean the heating unit. Performing this cleaning work requires shutting down the machine, which is time-consuming, costly, and results in a reduction in production efficiency.

[0005] In order to solve at least one of the above problems or other similar problems, embodiments of the present application provide a high-temperature hot box, a preparation method for a heating unit of the high-temperature hot box, and a false-twist texturing machine, so as to reduce the cost of the heating unit of the high-temperature hot box and improve the heat conduction efficiency, and at the same time enhance the antioxidant ability of the heating unit.

[0006] According to the first aspect of the embodiments of the present application, a preparation method for a heating unit of a high-temperature hot box is provided, wherein the preparation method includes: performing ceramization treatment on a carbon-carbon composite material to generate a ceramized carbon-carbon composite material; using the ceramized carbon-carbon composite material to make a heating part of the heating unit; using a high-temperature resistant metal to make a support part of the heating unit; and fixing the heat source, the support part, and the heating part of the heating unit through a fixing part, so that at least a part of the heat source is fixed between the support part and the heating part in a first direction and is in contact with the heating part.

[0007] According to the second aspect of the embodiments of the present application, a high-temperature hot box is provided, wherein the high-temperature hot box includes: a heating unit prepared according to the foregoing first aspect.

[0008] According to the third aspect of the embodiments of the present application, a false-twist texturing machine is provided, wherein the false-twist texturing machine includes the high-temperature hot box according to the foregoing second aspect.

[0009] The beneficial effects of the embodiments of the present application are at least as follows: By using a ceramized carbon-carbon composite material to prepare the heating part of the heating unit, the preparation cost of the heating unit is reduced, the heat conduction efficiency of the heating unit is improved, the antioxidant ability of the heating unit is enhanced, and based on the high temperature resistance of the ceramized carbon-carbon composite material (aluminum bronze in the prior art will soften at high temperatures during cleaning (for example, 700-800 °C) and cannot perform high-temperature self-cleaning), so the heating part can be processed by unmanned high-temperature self-cleaning, thereby saving labor costs and cleaning time and improving production efficiency.

[0010] Referring to the following description and the accompanying drawings, specific embodiments of the present application are disclosed in detail, indicating the ways in which the principles of the present application can be employed. It should be understood that the embodiments of the present application are not limited in scope thereby. Within the spirit and terms of the appended claims, the embodiments of the present application include many changes, modifications, and equivalents. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The accompanying drawings included are used to provide a further understanding of the embodiments of the present application, which form a part of the specification, illustrate the embodiments of the present application, and together with the written description explain the principles of the present application. Obviously, the following drawings are only some embodiments of the present application, and those of ordinary skill in the art can obtain other drawings based on these drawings without creative efforts. In the drawings:

[0012] [[ID=…]] Figure 1 is a schematic diagram of a method for preparing a heating unit of a high-temperature hot box according to an embodiment of the first aspect of the present application;

[0013] Figure 2 is Figure 1 a schematic diagram of a specific implementation method of step 101;

[0014] Figure 3 is a flowchart of a method for preparing a heating unit of a high-temperature hot box according to an embodiment of the first aspect of the present application;

[0015] Figure 4 is a schematic diagram of a high-temperature hot box according to an embodiment of the second aspect of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Referring to the accompanying drawings, the foregoing and other features of the present application will become apparent from the following description. In the description and drawings, specific embodiments of the present application are specifically disclosed, which show some embodiments in which the principles of the present application can be adopted. It should be understood that the present application is not limited to the described embodiments. On the contrary, the present application includes all modifications, variations and equivalents falling within the scope of the appended claims.

[0017] In the embodiments of the present application, terms such as "first" and "second" are used to distinguish different elements in terms of appellation, but do not represent the spatial arrangement or time sequence of these elements, and these elements should not be limited by these terms. The term "and / or" includes any one and all combinations of one or more of the related listed terms. Terms such as "comprising", "including", "having" and the like mean the presence of the stated features, elements, components or assemblies, but do not exclude the presence or addition of one or more other features, elements, components or assemblies.

[0018] In the embodiments of the present application, the singular forms "a", "the" and the like include the plural forms and should be broadly understood as "a kind" or "a class" rather than being limited to the meaning of "one"; in addition, the term "the" should be understood to include both the singular form and the plural form unless the context clearly indicates otherwise. In addition, the term "according to" should be understood as "at least partially according to...", and the term "based on" should be understood as "at least partially based on...", unless the context clearly indicates otherwise.

[0019] In the following description of the present application, unless otherwise specified, the direction in which the fixing part penetrates the heating part and the supporting part (the up and down direction in Figure 4 the following) is referred to as the "first direction", wherein the direction pointing from the heating part to the supporting part is called "upward" or "upper side", and the opposite direction is called "downward" or "lower side"; the direction in which the yarn penetrates the heating unit is called the "second direction", wherein the direction in which the yarn is first inserted is "front" (the left side in Figure 4 the following is the front), and the direction in which the yarn is inserted later is "rear" (the right side in Figure 4 the following is the rear); the direction perpendicular to both the first direction and the second direction is called the "third direction". It should be noted that the definition of these directions is only for the convenience of description and does not limit the orientation during the use and manufacture of the high-temperature hot box.

[0020] The following describes the embodiments of the present application with reference to the accompanying drawings.

[0021] Embodiments of the first aspect

[0022] Embodiments of the first aspect of the present application provide a method for preparing a heating unit of a high-temperature hot box.

[0023] Figure 1 It is a schematic diagram of a preparation method of a heating unit of a high-temperature hot box according to an embodiment of the first aspect of the present application.

[0024] As Figure 1 shown, the preparation method of the heating unit of the high-temperature hot box may include:

[0025] 101. Perform ceramization treatment on the carbon-carbon composite material to generate a ceramized carbon-carbon composite material;

[0026] 102. Use the ceramized carbon-carbon composite material to make the heating part of the heating unit;

[0027] 103. Use a high-temperature resistant metal to make the support part of the heating unit; and

[0028] 104. Fix the heat source, support part and heating part of the heating unit through the fixing part, so that at least a part of the heat source is fixed between the support part and the heating part in the first direction and is in contact with the heating part.

[0029] In the embodiment of the present application, since the cost of the ceramized carbon-carbon composite material is lower than the cost of aluminum bronze, the cost of preparing materials is saved. Also, since the heat conduction efficiency of the ceramized carbon-carbon composite material is higher than that of aluminum bronze (usually, the thermal conductivity of aluminum bronze is 59 W / (m·K), while the thermal conductivity of carbon material is 110 W / (m·K)), the heat conduction efficiency of the heating part is improved. And because the carbon-carbon composite material used to prepare the heating part has been subjected to ceramization treatment, the antioxidant ability of the heating part is enhanced; and because of the high temperature resistance of the ceramized carbon-carbon composite material, the heating part can be subjected to unmanned high-temperature self-cleaning treatment, thus saving labor costs and cleaning time and improving production efficiency.

[0030] Therefore, according to the above embodiment, by using the ceramized carbon-carbon composite material to prepare the heating part of the heating unit, the preparation cost of the heating unit is reduced, the heat conduction efficiency of the heating unit is improved, the antioxidant ability of the heating unit is enhanced at the same time, and labor costs and cleaning time can be saved, and production efficiency is improved.

[0031] In the embodiments of the present application, the heating part of the heating unit is a carbon-carbon composite material with antioxidant ability. That is to say, any material with antioxidant ability can be used to perform antioxidant treatment on the carbon-carbon composite material. In the embodiments of the present application, it is exemplified that ceramics are used to perform antioxidant treatment on the carbon-carbon composite material, but the present application is not limited thereto. Other metals with high antioxidant ability (for example, inert metals) or other materials (for example, other materials containing silicides) can also be used to perform antioxidant treatment on the carbon-carbon composite material; that is, a carbon-carbon composite material with antioxidant ability or a silicified carbon-carbon composite material can be used to prepare the heating part of the heating unit. For the purpose of cost saving and the like, the embodiments of the present application use a ceramized carbon-carbon composite material.

[0032] In the embodiments of the present application, in the ceramized carbon-carbon composite material, the proportion of ceramics is about 30% - 40%. The carbon-carbon composite material is pure carbon (graphite) + carbon fiber. After removing the proportion of ceramics, the proportion of graphite and carbon fiber in the remaining proportion is approximately 1.1:1 - 1.4:1 (for example, graphite 55%, carbon fiber 45%).

[0033] In the embodiments of the present application, the heat source is, for example, a heating rod. In order to make the heating rod in fixed contact with the heating part, a support part and a fixing part are used. The support part is made of a high-temperature resistant metal material, and the metal material is not easily broken, so the fixation of the heating rod and the heating part can be made more stable. The high-temperature resistant metal can be, for example, stainless steel.

[0034] In the embodiments of the present application, for the purpose of achieving unmanned high-temperature self-cleaning treatment of the heating part, for example, the power of the heating rod can be increased to make the heating part generate a high temperature of, for example, 700°C - 800°C. ]

[0035] Figure 2 is Figure 1 a schematic diagram of the specific implementation method of step 101.

[0036] As Figure 2 shown, step 101 may include:

[0037] 201, preheat the carbon-carbon composite material in a vacuum chamber;

[0038] 202, pressurize the vacuum chamber, and after pressurization, fill nitrogen, hydrogen, and methane into the vacuum chamber;

[0039] 203, spray the preheated carbon-carbon composite material with gasified ceramics, and during the spraying process, perform secondary heating on the carbon-carbon composite material to cause gas-phase infiltration deposition of the gasified ceramics and the carbon-carbon composite material;

[0040] 204, cooling the carbon-carbon composite material after gas-phase infiltration deposition; and

[0041] 205, reheating the cooled carbon-carbon composite material to generate a ceramized carbon-carbon composite material by saturating the carbon-carbon composite material after gas-phase infiltration deposition.

[0042] In an embodiment of the present application, after step 205, a carbon plate (sheet material) can be obtained from the ceramized carbon-carbon composite material, and then the carbon plate can be cut to process and form the heating part of the heating unit. However, the present application is not limited thereto. Before step 201, for example, a carbon plate can also be obtained from the laminated carbon-carbon composite material first, and then the carbon plate can be cut to process and form the heating part of the heating unit, and then subsequent steps such as preheating the heating part of the cut carbon-carbon composite material can be carried out according to 201.

[0043] In an embodiment of the present application, the material of the vacuum chamber for accommodating the carbon-carbon composite material for heating can be stainless steel, and a heating wire can be arranged in the vacuum chamber to heat the carbon-carbon composite material in the vacuum chamber by means of thermal radiation; however, the present application is not limited to this heating method, and any heating method for heating the carbon-carbon composite material by thermal radiation or heat conduction is included in the present application.

[0044] In an embodiment of the present application, the preheating of the carbon-carbon composite material in the vacuum chamber in the above step 201 can include: heating the carbon-carbon composite material to 500°C to 1500°C. Within the above-defined temperature range, as the heating temperature is higher, the molecular pores of the carbon-carbon composite material can be further enlarged, so that the process of ceramizing the carbon-carbon composite material can be further shortened or accelerated. Therefore, heating the carbon-carbon composite material at a higher temperature can further achieve the purpose of improving efficiency and saving the process time cost.

[0045] In an embodiment of the present application, preferably, the carbon-carbon composite material can be heated to 600°C to 1300°C.

[0046] In an embodiment of the present application, in the above step 202, for example, the vacuum chamber can be pressurized to 150 - 300 MPa. Among them, if the pressure is 150 MPa, then the subsequent gas-phase infiltration rate is relatively slow when achieving the same effect; if the pressure is 300 MPa, then the subsequent gas-phase infiltration rate is relatively fast when achieving the same effect. Or rather, if the pressure is 150 MPa, then within the same period of time, in the subsequent gas-phase infiltration step, only the surface layer of the carbon-carbon composite can be infiltrated to achieve the gas-phase infiltration effect (for example, for a 50-cm carbon-carbon composite, the gas-phase infiltration effect with a pressure of 150 MPa can infiltrate and gasify the ceramic in a position about 2 - 3 cm deep in the surface layer of the carbon-carbon composite, that is, only the carbon-carbon composite with a depth of 2 - 3 cm can achieve the gas-phase infiltration effect), while if the pressure is 300 MPa, then within the same period of time, in the subsequent gas-phase infiltration step, the entire carbon-carbon composite can be fully infiltrated to achieve the gas-phase infiltration effect.

[0047] In an embodiment of the present application, the air pressure value during spray pressurization can be selected according to actual needs to achieve different purposes of partial or overall ceramization of the carbon-carbon composite.

[0048] In an embodiment of the present application, for example, when heating the carbon-carbon composite to 600°C - 1300°C, the time for pressurizing the vacuum chamber to 150 - 300 MPa is 5 - 72 hours (preferably, the pressurization time can be 72 hours). At this time, the effect of fully infiltrating and gasifying the ceramic in the entire carbon-carbon composite can be achieved.

[0049] In an embodiment of the present application, in the above step 202, the purpose of filling nitrogen into the vacuum chamber is to protect the carbon material, and the purposes of filling hydrogen and methane are to better catalyze the subsequent gas-phase infiltration deposition reaction. The order of filling nitrogen, hydrogen, and methane into the vacuum chamber can be to fill nitrogen first, then hydrogen, and finally methane, but it can also be to fill the three gases simultaneously. Compared with filling the three gases simultaneously, filling the three gases in the above sequential order can further achieve the purpose of better protecting the carbon material and better catalyzing the gas-phase infiltration deposition reaction.

[0050] In an embodiment of the present application, the proportions of nitrogen, hydrogen, and methane are approximately 35% - 45% for nitrogen, 20% - 35% for hydrogen, and 20% - 35% for methane. Preferably, nitrogen can account for 40%, hydrogen can account for 30%, and methane can account for 30%.

[0051] In the embodiments of the present application, the methane filled may also be a fuel gas including methane components, such as natural gas, etc. Of course, the present application is not limited to the above three gases, and any gas that can achieve the effects of protecting carbon materials and catalyzing gas-phase infiltration deposition reactions, etc. is included in the present application.

[0052] In the embodiments of the present application, in the above step 203, a gasified ceramic is sprayed onto the pre-heated carbon-carbon composite material from top to bottom above the vacuum chamber through a molecular pump, and during the spraying process, the carbon-carbon composite material is heated for the second time. For example, it can be heated to 1500 °C to 2000 °C (preferably, it can be heated to 1580 °C) to achieve the purpose of gas-phase infiltration deposition (which can also be called "chemical vapor infiltration deposition").

[0053] In the embodiments of the present application, the above step 204 of cooling the carbon-carbon composite material after gas-phase infiltration deposition may include cooling the carbon-carbon composite material after gas-phase infiltration deposition to room temperature to obtain the cooled carbon-carbon composite material.

[0054] In the embodiments of the present application, the above step 205 of reheating the cooled carbon-carbon composite material may include reheating the cooled carbon-carbon composite material to 400 °C to 600 °C again; preferably, reheating the cooled carbon-carbon composite material to about 500 °C to perform a saturation treatment on the carbon-carbon composite material, that is, to disperse the ceramic molecules in the carbon-carbon composite material after gas-phase infiltration deposition to achieve homogenization (for example, for the carbon-carbon composite material after gas-phase infiltration deposition generated under a pressure of 300 MPa, the purpose of reheating can be to make the surface of each molecular material of carbon-carbon be covered with ceramics), thereby generating a ceramized carbon-carbon composite material.

[0055] In the embodiments of the present application, in the above step 101, the specific process of "performing ceramization treatment on the carbon-carbon composite material to generate a ceramized carbon-carbon composite material" uses a gasified ceramic to perform a gas-phase infiltration deposition reaction with the carbon-carbon composite material to generate a ceramized carbon-carbon composite material, but the present application is not limited thereto. For example, a liquefied ceramic can also be used to perform a liquid-phase infiltration deposition reaction with the carbon-carbon composite material to generate a ceramized carbon-carbon composite material. Compared with using a liquid-phase infiltration deposition reaction to generate a ceramized carbon-carbon composite material, using a gas-phase infiltration deposition reaction to generate a ceramized carbon-carbon composite material can achieve better effects of lower cost, smaller particles, and controllable flow rate and accuracy.

[0056] The preparation method of the heating unit of the high-temperature hot box is exemplified below by the specific process of preparing the heating unit of the high-temperature hot box.

[0057] Figure 3It is a flowchart of a method for preparing a heating unit of a high-temperature hot box according to an embodiment of the first aspect of the present application.

[0058] As Figure 3 shown, the method for preparing a heating unit of a high-temperature hot box may include:

[0059] 301, obtaining a carbon plate (sheet material) from a carbon-carbon composite material formed by lamination;

[0060] 302, cutting the carbon plate according to the shape of the heating part of the heating unit;

[0061] 303, placing the cut carbon plate in a vacuum chamber to preheat the cut carbon plate (carbon-carbon composite material) in the vacuum chamber;

[0062] For example, heating the carbon-carbon composite material to 500°C to 1500°C, preferably heating the carbon-carbon composite material to 600°C to 1300°C.

[0063] 304, pressurizing the vacuum chamber, and filling nitrogen, hydrogen, and methane into the vacuum chamber after pressurization;

[0064] For example, when the temperature in the vacuum chamber is 600°C to 1300°C, pressurize the vacuum chamber to 150 to 300 MPa for 5 to 72 hours, and then sequentially fill 40% nitrogen, 30% hydrogen, and 30% methane in this order.

[0065] 305, spraying the preheated carbon plate (carbon-carbon composite material) with gasified ceramic, and during the spraying process, secondary heating the carbon plate (carbon-carbon composite material) to generate gas-phase infiltration deposition;

[0066] For example, the carbon plate (carbon-carbon composite material) can be secondary heated to 1500°C to 2000°C.

[0067] 306, cooling the carbon plate (carbon-carbon composite material) after gas-phase infiltration deposition;

[0068] For example, cooling to room temperature.

[0069] 307, reheating the cooled carbon plate (carbon-carbon composite material) to generate a ceramicized carbon plate (carbon-carbon composite material);

[0070] For example, heating to 400°C to 600°C, preferably heating to 500°C. According to the above embodiment, by using the ceramicized carbon-carbon composite material to prepare the heating part of the heating unit, the preparation cost of the heating unit is reduced, the heat conduction efficiency of the heating unit is improved, the antioxidant ability of the heating unit is enhanced, and the labor cost and cleaning time can be saved, and the production efficiency is improved.

[0071] Embodiments of the second aspect

[0072] Embodiments of the second aspect of the present application provide a high-temperature hot box.

[0073] Figure 4 It is a schematic diagram of the high-temperature hot box of the embodiments of the second aspect of the present application, showing a front view of the high-temperature hot box when observed along the third direction.

[0074] As Figure 4 shown, the high-temperature hot box 400 may include a heating unit 401 for heating an object to be heated (e.g., yarn). The heating unit 401 is the heating unit prepared by the preparation method of the embodiments of the first aspect. In the embodiments of the first aspect, the content of the heating unit 401 is included herein and will not be elaborated herein.

[0075] In the embodiments of the present application, as Figure 4 shown, the heating unit 401 may include: a heating part 4011, a support part 4012, a heat source 4013, and a fixing part 4014. The support part 4012 is disposed above the heating part 4011 and in contact with the heating part 4011. At least a part of the heat source (heating rod) 4013 is disposed between the support part 4012 and the heating part 4011 in the first direction and is in contact with the heating part 4011. The fixing part 4014 penetrates through the heating part 4011 and the support part 4012 in the first direction for fixing the heat source (heating rod) 4013, the support part 4012, and the heating part 4011, so that the heat source 4013 is fixed between the support part 4012 and the heating part 4011 in the first direction and is in contact with the heating part 4011.

[0076] In the embodiments of the present application, the material of the support part 4012 may be, for example, stainless steel (a heat-resistant metal). As Figure 4 shown, the number of the support parts 4012 is two, and there is a gap P1 between the two support parts 4012 in the second direction. Thus, through the gap, it is possible to prevent the carbon material of the heating part 4011 from cracking due to the different degrees of thermal expansion and contraction of the support part 4012 (stainless steel) and the heating part 4011 (carbon material).

[0077] In the embodiments of the present application, Figure 4 the case where the number of the support parts 4012 is two is exemplified, but the present application is not limited thereto. There may be multiple support parts 4012 in the second direction, and there are gaps between each of the support parts 4012.

[0078] In the embodiments of the present application, as Figure 4As shown, a support part 4012 may be provided with a plurality of fixing parts 4014, and the plurality of fixing parts 4014 are respectively located at both ends of the support part 4012 in the second direction.

[0079] In the embodiment of the present application, as Figure 4 shown, the fixing part 4014 may be a bolt. However, the present application is not limited thereto, and any fixing method for fixedly connecting the heat source 4013, the support part 4012, and the heating part 4011 may be included in the present application.

[0080] In the embodiment of the present application, the material of the fixing part 4014 may be stainless steel.

[0081] Only the components related to the high-temperature hot box of the embodiment of the present application are described above. The present application is not limited thereto, and the high-temperature hot box may further include other conventional components. For details, reference may be made to the related art, and the description is omitted here.

[0082] According to the above embodiment, since the material of the heating part 4011 of the heating unit 401 of the high-temperature hot box 400 is a ceramicized carbon-carbon composite material, the preparation cost of the heating unit 401 is reduced, the heat conduction efficiency of the heating unit 401 is improved, the antioxidant capacity of the heating unit 401 is enhanced, and the labor cost and cleaning time can be saved, thereby improving the production efficiency.

[0083] Embodiments of the third aspect

[0084] The embodiment of the third aspect of the present application provides a false twist texturing machine.

[0085] The false twist texturing machine has the high-temperature hot box 400 described in the embodiment of the second aspect.

[0086] Among them, in the embodiment of the second aspect, the main structure of the high-temperature hot box 400 has been described in detail, and its content is included herein and will not be repeated here.

[0087] Only the components related to the false twist texturing machine of the embodiment of the present application are described above. The present application is not limited thereto, and the false twist texturing machine may further include other conventional components. For details, reference may be made to the related art, and the description is omitted here.

[0088] In this way, according to the false twist texturing machine including the high-temperature hot box 400, since the material of the heating part 4011 of the heating unit 401 of the high-temperature hot box 400 is a ceramicized carbon-carbon composite material, the preparation cost of the heating unit 401 is reduced, the heat conduction efficiency of the heating unit 401 is improved, the antioxidant capacity of the heating unit 401 is enhanced, and the labor cost and cleaning time can be saved, thereby improving the production efficiency.

[0089] The above description of the present application is made in conjunction with specific embodiments, but those skilled in the art should understand that these descriptions are exemplary and not a limitation on the protection scope of the present application. Those skilled in the art can make various variations and modifications to the present application according to the spirit and principle of the present application, and these variations and modifications are also within the scope of the present application.

[0090] The preferred embodiments of the present application have been described above with reference to the accompanying drawings. Many features and advantages of these embodiments are clear from this detailed description, and the appended claims are therefore intended to cover all such features and advantages of these embodiments that fall within their true spirit and scope. In addition, since many modifications and changes are readily envisioned by those skilled in the art, the embodiments of the present application are not to be limited to the exact structures and operations illustrated and described, but may cover all suitable modifications and equivalents that fall within their scope.

Claims

1. A preparation method of a heating unit of a high-temperature hot box, characterized in that, The preparation method includes: Ceramizing the carbon-carbon composite material to generate a ceramized carbon-carbon composite material; Manufacturing the heating part of the heating unit by using the ceramized carbon-carbon composite material; Manufacturing the support part of the heating unit by using a high-temperature resistant metal; and Fixing the heat source, the support part and the heating part of the heating unit through a fixing part, so that at least a part of the heat source is fixed between the support part and the heating part in a first direction and contacts the heating part.

2. The preparation method according to claim 1, characterized in that, The ceramizing treatment of the carbon-carbon composite material includes: Preheating the carbon-carbon composite material in a vacuum chamber; Pressurizing the vacuum chamber, and after pressurization, filling nitrogen, hydrogen and methane into the vacuum chamber; Spraying the preheated carbon-carbon composite material with gasified ceramic, and during the spraying process, secondarily heating the carbon-carbon composite material so that the gasified ceramic and the carbon-carbon composite material undergo gas-phase infiltration deposition; Cooling the carbon-carbon composite material after gas-phase infiltration deposition; and Reheating the cooled carbon-carbon composite material to generate the ceramized carbon-carbon composite material by saturating the carbon-carbon composite material after gas-phase infiltration deposition.

3. The preparation method according to claim 2, wherein The preheating of the carbon-carbon composite material in the vacuum chamber includes: Heating the carbon-carbon composite material to 500°C to 1500°C.

4. The preparation method according to claim 2, characterized in that, The preheating of the carbon-carbon composite material in the vacuum chamber includes: Heating the carbon-carbon composite material to 600°C to 1300°C.

5. The preparation method according to claim 2, characterized in that, The pressurization of the vacuum chamber includes: Pressurizing the vacuum chamber to 150 - 300 MPa.

6. The preparation method according to claim 5, characterized in that, Pressurizing the vacuum chamber to 150 - 300 MPa includes: When the temperature in the vacuum chamber is 600°C to 1300°C, the time for pressurizing the vacuum chamber to 150 - 300 MPa is 5 to 72 hours.

7. The preparation method according to claim 2, wherein The secondary heating of the carbon-carbon composite material includes: Secondarily heating the carbon-carbon composite material to 1500°C to 2000°C.

8. The preparation method according to claim 2, wherein The cooling of the carbon-carbon composite material after gas-phase infiltration deposition includes: Cooling the carbon-carbon composite material after gas-phase infiltration deposition to room temperature.

9. The preparation method according to claim 2, wherein The reheating of the cooled carbon-carbon composite material includes: Heating the cooled carbon-carbon composite material to 400°C to 600°C.

10. The preparation method according to claim 2, wherein The material of the vacuum chamber is stainless steel.

11. The preparation method according to claim 1, wherein The high-temperature resistant metal is stainless steel.

12. A high-temperature hot box, characterized in that, The high-temperature hot box includes: The heating unit prepared according to any one of claims 1 to 11.

13. A false-twist texturing machine, characterized in that, The false-twist texturing machine includes the high-temperature hot box according to claim 12.

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