Integrated heat preservation cylinder structure

Abstract

The application provides an integrated heat preservation cylinder structure, which comprises carbon-carbon composite material, viscose-based soft felt and PAN-based hard composite felt arranged in the heat preservation cylinder; the carbon-carbon composite material is in a cylindrical shape, the carbon-carbon composite material comprises an inner carbon-carbon cylinder and an outer carbon-carbon cylinder; the inner carbon-carbon cylinder is located at the innermost side of the heat preservation cylinder; the viscose-based soft felt is in a cylindrical shape and is located at the radial outer side of the inner carbon-carbon cylinder; the outer carbon-carbon cylinder is located at the radial outer side of the viscose-based soft felt; and the PAN-based hard composite felt is in an annular shape and is located between the inner carbon-carbon cylinder and the outer carbon-carbon cylinder.

Description

Technical Field

[0001] This utility model relates to the field of powder metallurgy technology, and in particular to an integrated heat preservation cylinder structure. Background Technology

[0002] When powder metallurgy furnaces operate at high temperatures, heat is lost outwards. Therefore, insulation materials with low density, high porosity, and low thermal conductivity are typically used to reduce heat loss, improve furnace thermal efficiency, and reduce energy consumption. Due to its low thermal conductivity, excellent insulation performance, and resistance to ablation, carbon fiber graphite felt, rigid composite felt, and carbon-carbon composite materials are all suitable for thermal insulation in powder metallurgy furnaces. Currently, rigid carbon fiber composite felt is a commonly used insulation material in powder metallurgy furnaces, possessing high strength and rigidity, good insulation performance, and ease of processing.

[0003] However, rigid carbon fiber composite felt may delaminate or crack during high-temperature thermal cycling, leading to decreased insulation performance and shortened service life. Compared to soft carbon fiber felt, rigid composite felt has a higher thermal conductivity and slightly inferior insulation effect. Furthermore, the mechanical strength of rigid composite felt is also slightly inferior to that of carbon-carbon composite materials. Therefore, a composite structure integrated insulation cylinder was designed, combining different materials to improve the overall performance of the insulation cylinder. Utility Model Content

[0004] This application provides an integrated insulation cylinder structure, including a carbon-carbon composite material, a viscose-based soft felt, and a PAN-based rigid composite felt disposed inside the insulation cylinder;

[0005] The carbon-carbon composite material is cylindrical, and the carbon-carbon composite material includes a carbon-carbon inner cylinder and a carbon-carbon outer cylinder;

[0006] The carbon-carbon inner cylinder is located on the innermost side of the insulation cylinder;

[0007] The adhesive-based soft felt is cylindrical and is located radially outside the carbon inner cylinder;

[0008] The carbon-carbon outer cylinder is located radially outside the viscose-based soft felt;

[0009] The PAN-based rigid composite felt is ring-shaped and is located between the carbon-carbon inner cylinder and the carbon-carbon outer cylinder.

[0010] In one possible implementation, the integrated heat-insulating cylinder structure provided in this application embodiment includes a carbon-carbon inner cylinder comprising a lower carbon-carbon inner cylinder and an upper carbon-carbon inner cylinder, wherein the upper carbon-carbon inner cylinder is located directly above the lower carbon-carbon inner cylinder, and the lower carbon-carbon inner cylinder is connected to the upper carbon-carbon inner cylinder.

[0011] In one possible implementation, the integrated heat-insulating cylinder structure provided in this application embodiment includes a carbon-carbon outer cylinder comprising a carbon-carbon lower outer cylinder and a carbon-carbon upper outer cylinder;

[0012] The carbon-carbon lower outer cylinder and the carbon-carbon upper outer cylinder are located radially outside the viscose-based soft felt, with the carbon-carbon upper outer cylinder located directly above the carbon-carbon lower outer cylinder and connected to each other.

[0013] In one possible implementation, the integrated thermal insulation cylinder structure provided in this application embodiment includes a PAN-based rigid composite felt comprising a PAN-based top rigid composite felt and a PAN-based bottom rigid composite felt.

[0014] In one possible implementation, the integrated insulation cylinder structure provided in this application embodiment has the PAN-based bottom rigid composite felt located below the adhesive-based soft felt and between the carbon-carbon inner lower cylinder and the carbon-carbon outer lower cylinder, and the PAN-based bottom rigid composite felt is connected to the carbon-carbon inner lower cylinder and the carbon-carbon outer lower cylinder.

[0015] The PAN-based top rigid composite felt is located above the adhesive-based soft felt and between the carbon-carbon inner upper cylinder and the carbon-carbon outer upper cylinder. The PAN-based top rigid composite felt is connected to the carbon-carbon inner upper cylinder and the carbon-carbon outer upper cylinder.

[0016] Beneficial Effects: The integrated insulation cylinder structure provided in this application is manufactured using a composite structure of carbon-carbon, soft felt, and rigid composite felt, achieving the functions of outer layer load-bearing, middle buffering, and end sealing. It also improves the structural strength of the insulation cylinder, comprehensively enhances thermal field performance, reduces energy consumption, and strengthens its high-temperature resistance, corrosion resistance, and pressure resistance, thus extending the service life of the insulation cylinder. This design has significant advantages in metallurgical applications requiring long-term high-temperature insulation. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the cross-sectional structure of the integrated insulation cylinder of this application;

[0019] Figure 2 yes Figure 1 Enlarged structural diagram at point I;

[0020] Figure 3 yes Figure 1 Enlarged structural diagram at point II;

[0021] Figure 4 yes Figure 1 Enlarged structural diagram at point III;

[0022] Explanation of reference numerals in the attached figures

[0023] 1. Carbon-carbon inner lower cylinder; 2. Carbon-carbon inner upper cylinder; 3. Carbon-carbon outer lower cylinder; 4. Carbon-carbon outer upper cylinder; 5. Adhesive-based soft felt; 6. PAN-based bottom rigid composite felt; 7. PAN-based top rigid composite felt. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions in the embodiments of this application will be described in more detail below with reference to the accompanying drawings. In the drawings, the same or similar reference numerals denote the same or similar components or components having the same or similar functions throughout. The described embodiments are some, but not all, of the embodiments of this application. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0025] like Figure 1 As shown, an integrated insulation cylinder structure includes a carbon-carbon composite material, an adhesive-based soft felt, and a PAN-based rigid composite felt. The carbon-carbon composite material, the adhesive-based soft felt, and the rigid composite felt are all placed inside the insulation cylinder. The carbon-carbon composite material is cylindrical, consisting of inner and outer layers, each further divided into upper and lower parts: a lower inner carbon-carbon cylinder 1, an upper inner carbon-carbon cylinder 2, a lower outer carbon-carbon cylinder 3, and an upper outer carbon-carbon cylinder 4. The lower inner carbon-carbon cylinder 1 is located at the innermost edge of the insulation cylinder, and the upper inner carbon-carbon cylinder 2 is located at the innermost edge of the insulation cylinder and directly above the lower inner carbon-carbon cylinder 1. The lower inner carbon-carbon cylinder 1 and the upper inner carbon-carbon cylinder 2 are connected. The adhesive-based soft felt 5... The inner carbon cylinder is cylindrical and located radially outside the inner carbon cylinder. The outer lower carbon cylinder 3 and the outer upper carbon cylinder 4 are located radially outside the adhesive soft felt 5. The outer upper carbon cylinder 4 is located directly above the outer lower carbon cylinder 3 and is connected to each other. The rigid composite felt is annular, consisting of a top rigid composite felt 7 and a bottom rigid composite felt 6. The bottom rigid composite felt 6 is located below the soft felt cylinder 5 and between the inner lower carbon cylinder 1 and the outer lower carbon cylinder 3, and is connected to the inner lower carbon cylinder 1 and the outer lower carbon cylinder 3. The top rigid composite felt 7 is located above the soft felt cylinder 5 and between the inner upper carbon cylinder 2 and the outer upper carbon cylinder 4, and is connected to the inner upper carbon cylinder 2 and the outer upper carbon cylinder 4.

[0026] During installation, the carbon-carbon inner lower cylinder 1 and carbon-carbon inner upper cylinder 2 are first connected at the joint using carbon nails, with one carbon nail used for fixation every 20 degrees. Then, using a rolling platform, the carbon-carbon inner cylinder is fixed to the clamp, and clamps are used to fix it to the rotating bracket. The carbon-carbon inner cylinder is rotated, and the soft felt 5 is wrapped around the outside of the carbon-carbon inner cylinder layer by layer. Each layer of soft felt is spirally wound with carbon wire, and the joints are sewn to ensure that the soft felt will not slip or shift. After that, the carbon-carbon outer lower cylinder 3 and carbon-carbon outer upper cylinder 4 are connected and fixed using carbon nails. The combination of the carbon-carbon inner cylinder and the soft felt 5 is placed into the carbon-carbon outer cylinder, ensuring that there are no gaps between the carbon-carbon inner cylinder and the outer cylinder. Finally, the bottom rigid composite felt 6 and the top rigid composite felt 7 are placed below and above the soft felt cylinder 6, respectively. Carbon nails are also used to fix the junction of the carbon-carbon cylinder and the rigid composite felt, realizing the integrated structure of the insulation cylinder.

[0027] The inner and outer layers of the insulation cylinder consist of a lower carbon-carbon inner cylinder 1, an upper carbon-carbon inner cylinder 2, a lower carbon-carbon outer cylinder 3, and an upper carbon-carbon outer cylinder 4, which serve as load-bearing layers, providing a rigid outer shell to resist mechanical impacts and external loads. The carbon-carbon composite material has high thermal conductivity, allowing for rapid and uniform heat distribution, reducing localized thermal stress, protecting the inner layers, and extending the service life of the insulation cylinder in high-temperature corrosive environments. An adhesive-based soft felt 5 layer serves as the main insulation layer, significantly reducing heat loss. The soft felt 5 also adapts to the deformation of the inner and outer layers, filling gaps, ensuring no thermal bridges in the interlayer, and further reducing the overall weight of the insulation cylinder for easier handling and installation. Top and bottom rigid composite felt 7 and 6 are used as end caps to prevent heat leakage from the top and bottom, maintaining temperature uniformity inside the cylinder and protecting the soft felt 5 interlayer from compression damage.

[0028] like Figure 2 As shown, both the carbon-carbon inner cylinder and the carbon-carbon outer cylinder are divided into a lower cylinder and an upper cylinder, reducing the cylinder height to facilitate machining.

[0029] like Figure 1 , 3 As shown, the outer top and bottom of the carbon-carbon inner lower cylinder 1, carbon-carbon inner upper cylinder 2, carbon-carbon outer lower cylinder 3, and carbon-carbon outer upper cylinder 4 all have increased wall thickness compared to the middle. During machining, the thickened top and bottom can serve as clamping areas for the machine tool, preventing deformation of the thin walls under stress. Furthermore, thin-walled carbon-carbon cylinders are prone to vibration due to radial cutting forces during turning; the thickened ends can enhance the rigidity of the carbon-carbon cylinder, suppress vibration, and prevent the formation of chatter marks on the thin-walled surface or increased dimensional tolerances.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. An integrated heat-insulating cylinder structure, characterized in that, This includes carbon-carbon composite materials, viscose-based soft felt, and PAN-based rigid composite felt placed inside the insulation cylinder; The carbon-carbon composite material is cylindrical, and the carbon-carbon composite material includes a carbon-carbon inner cylinder and a carbon-carbon outer cylinder; The carbon-carbon inner cylinder is located on the innermost side of the insulation cylinder; The adhesive-based soft felt is cylindrical and is located radially outside the carbon inner cylinder; The carbon-carbon outer cylinder is located radially outside the viscose-based soft felt; The PAN-based rigid composite felt is ring-shaped and is located between the carbon-carbon inner cylinder and the carbon-carbon outer cylinder.

2. The integrated heat-insulating cylinder structure according to claim 1, characterized in that, The carbon-carbon inner cylinder includes a lower carbon-carbon inner cylinder and an upper carbon-carbon inner cylinder. The upper carbon-carbon inner cylinder is located directly above the lower carbon-carbon inner cylinder, and the lower carbon-carbon inner cylinder is connected to the upper carbon-carbon inner cylinder.

3. The integrated heat-insulating cylinder structure according to claim 2, characterized in that, The carbon-carbon outer cylinder includes a carbon-carbon lower outer cylinder and a carbon-carbon upper outer cylinder; The carbon-carbon lower outer cylinder and the carbon-carbon upper outer cylinder are located radially outside the viscose-based soft felt, with the carbon-carbon upper outer cylinder located directly above the carbon-carbon lower outer cylinder and connected to each other.

4. The integrated heat-insulating cylinder structure according to claim 3, characterized in that, The PAN-based rigid composite felt includes a PAN-based top rigid composite felt and a PAN-based bottom rigid composite felt.

5. The integrated heat-insulating cylinder structure according to claim 4, characterized in that, The PAN-based rigid composite felt is located below the adhesive-based soft felt and between the inner carbon cylinder and the outer carbon cylinder. The PAN-based rigid composite felt is connected to the inner carbon cylinder and the outer carbon cylinder. The PAN-based top rigid composite felt is located above the adhesive-based soft felt and between the carbon-carbon inner upper cylinder and the carbon-carbon outer upper cylinder. The PAN-based top rigid composite felt is connected to the carbon-carbon inner upper cylinder and the carbon-carbon outer upper cylinder.

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