Anti-sagging graphitization furnace insulation layer structure

Abstract

The utility model provides an anti-sagging graphitization furnace heat preservation layer structure, heat preservation layer structure sets up in the graphitization furnace is used for placing the muffle cavity around of material to be heated, and provides the heating pipe both ends of graphitization furnace heat respectively erects on heat preservation layer structure, and it includes fibreboard layer, hard felt component and soft felt, fibreboard layer constitutes heat preservation layer structure frame, heating pipe erects between heat preservation layer structure, is provided with hard felt component on fibreboard layer, hard felt component supports heating pipe in preset position, the rest is filled by soft felt, makes hard felt component keep in preset position. The design of heat preservation layer structure in the utility model can play the buffering and support effect, improves the stability and rigidity of heat preservation layer structure, and then improves the security and economic benefits in the production process.

Description

Technical Field

[0001] This utility model belongs to the technical field of high-temperature heat treatment equipment, and in particular relates to a heat insulation layer structure for a graphitization furnace that is resistant to sagging. Background Technology

[0002] Currently, high-temperature graphitization furnaces operate at 2500℃ and above for extended periods, facing multiple technical bottlenecks and exhibiting numerous technical defects in practical applications. The soft felt in the insulation structure exhibits high-temperature shrinkage. Due to prolonged operation at ultra-high temperatures, the shrinkage of the soft felt in the original insulation structure causes the insulation structure to sink. The graphite sheath embedded in the insulation layer and placed outside the heating tubes also sinks, leading to overlap with the heating tubes and sparking, resulting in significant energy loss. In severe cases, it can cause the insulation layer to overheat, with temperature surges to the furnace shell, manifesting as localized high temperatures externally. Therefore, improving the stability and rigidity of the insulation structure can enhance both safety and economic efficiency in the production process. Utility Model Content

[0003] In view of this, the present invention aims to propose an anti-sagging insulation layer structure for graphitization furnaces, so as to solve the problem of stabilizing the insulation structure and the graphite sheath and heating tube mounted on the insulation structure in a preset position.

[0004] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0005] A graphitization furnace insulation layer structure with anti-sagging is provided. The insulation layer structure is arranged around the muffle cavity of the graphitization furnace for placing the material to be heated, and the heating tubes that provide heat to the graphitization furnace are respectively mounted on the insulation layer structure at both ends. The insulation layer structure includes a fiberboard layer, a hard felt assembly and a soft felt.

[0006] Fiberboard layers form the insulation layer structure framework, heating tubes are installed between the insulation layer structures, and rigid felt assemblies are installed on the fiberboard layers. The rigid felt assemblies support the heating tubes in a preset position, and the remaining part is filled with soft felt, so that the rigid felt assemblies are kept in the preset position.

[0007] Furthermore, the rigid felt assembly includes a supporting rigid felt, with supporting rigid felts provided above and below the heating tube, which support the heating tube in a preset position.

[0008] Furthermore, the rigid felt assembly also includes a stepped rigid felt, with a supporting rigid felt disposed on the fiberboard layer. A stepped rigid felt is also disposed between the supporting rigid felt and the fiberboard layer. One side wall of the stepped rigid felt is stepped and contacts the soft felt, while the other side wall of the stepped rigid felt contacts the supporting rigid felt.

[0009] Furthermore, at least two sets of supporting rigid felts are mounted on one end of a heating tube. The ends of the two sets of supporting rigid felts are not on the same horizontal plane and are mounted on the same fiberboard layer through stepped rigid felts. A support plate is also provided between the set of supporting rigid felts farther away from the fiberboard layer and the stepped rigid felts.

[0010] Furthermore, the heating tube is supported at two predetermined positions by two sets of rigid supporting felts at both ends. The ends of the two sets of rigid supporting felts are not on the same horizontal plane, and they are supported on the same fiberboard layer by stepped rigid felts. A support plate is also provided between the set of rigid supporting felts farther away from the fiberboard layer and the stepped rigid felts.

[0011] One side of the stepped hard felt, except for the bottom layer, is on the same horizontal plane and abuts against another set of supporting hard felts. The bottom layer of the stepped hard felt supports the set of supporting hard felts. The other side of the stepped hard felt is stepped.

[0012] The space between the stepped hard felt below both ends of the heating tube is filled with soft felt;

[0013] The space between the supporting rigid felt frame and the fiberboard layer corresponding to each heating tube is filled with soft felt.

[0014] Furthermore, graphite sheaths are wrapped around both ends of the heating tube, and the rigid felt assembly is used to support the outside of the graphite sheaths.

[0015] Furthermore, the fiberboard layer includes a fiberboard layer one placed vertically on both sides and a fiberboard layer two placed horizontally. The fiberboard layer two is laid at the bottom of the graphitization furnace, the fiberboard layer one is vertically placed inside the graphitization furnace and is used to support the heating pipes, the supporting rigid felt is placed on the fiberboard layer two, and the space between the supporting rigid felt and the fiberboard layer one is filled with soft felt.

[0016] Furthermore, the stepped hard felt is installed on the second fiberboard layer.

[0017] Furthermore, the fiberboard layer is made of ceramic material.

[0018] Compared with existing technologies, the anti-sagging insulation layer structure for graphitization furnaces described in this utility model has the following advantages:

[0019] The design of this utility model's insulation layer structure can play a buffering and supporting role, improve the stability and rigidity of the insulation layer structure, and thus improve the safety and economic benefits in the production process.

[0020] Using a combination of stepped hard felt and supporting hard felt can further enhance the ability to disperse and support the cushioning force. Using soft felt for filling can also prevent the overall insulation layer structure from collapsing when only soft felt is used for cushioning. Attached Figure Description

[0021] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0022] Figure 1 A schematic diagram of a heating pipe mounted on an anti-sagging graphitization furnace insulation layer structure according to an embodiment of this utility model;

[0023] Figure 2 for Figure 1 AA magnified image.

[0024] Explanation of reference numerals in the attached figures:

[0025] 1. Insulation layer structure; 2. Heating tube; 3. Fiberboard layer; 301. Fiberboard layer one; 302. Fiberboard layer two; 4. Muffle cavity; 7. Supporting rigid felt one; 8. Stepped rigid felt; 9. Soft felt; 10. Support plate; 11. Graphite sheath; 12. Supporting rigid felt two; Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments of the present invention can be combined with each other.

[0027] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0030] like Figure 1-2 As shown, the insulation layer structure 1 is set around the muffle cavity 4, and the heating pipe 3 that provides heat to the graphitization furnace is mounted on the insulation layer structure 1 at both ends.

[0031] The insulation layer structure 1 includes a fiberboard layer 3 and a supporting rigid felt arranged longitudinally relative to the heating pipe 2. The fiberboard layer 3 forms the frame of the insulation layer structure 1. The heating pipe 2 is installed between the insulation layer structures 1. The supporting rigid felt is set on the fiberboard layer. A stepped rigid felt 8 is also provided between the supporting rigid felt and the fiberboard layer 3. The remaining positions are filled with soft felt 9.

[0032] The fiberboard layer 3 is a ceramic fiberboard layer 3.

[0033] The insulation layer structure 1 adopts an anti-sagging interlayer constraint structure to solve the problem of poor deformation due to shrinkage of soft felt 9 and expansion of hard felt 9.

[0034] At least two sets of supporting hard felts are mounted on one end of a heating tube. The ends of the two sets of supporting hard felts are not on the same horizontal plane and are mounted on the same fiberboard layer by a stepped hard felt 8. A support plate 10 is also provided between the set of supporting hard felts far from the fiberboard layer and the stepped hard felt 8.

[0035] The heating tube 2 is mounted at two preset positions by two sets of supporting hard felts at both ends. One side of the stepped hard felt 8 is on the same horizontal plane except for the bottom layer and abuts against another set of supporting hard felts 7. The bottom layer of the stepped hard felt 8 supports the set of supporting hard felts 7. The other side of the stepped hard felt 8 is stepped.

[0036] The space between the stepped hard felt 8 below both ends of the heating tube 2 is filled with soft felt 9.

[0037] The fiberboard layer 3 includes a first fiberboard layer 301 placed vertically on both sides and a second fiberboard layer 302 placed horizontally. The second fiberboard layer 302 is laid at the bottom of the graphitization furnace, the first fiberboard layer 301 is vertically placed inside the graphitization furnace and is used to support the heating tube 2. The supporting rigid felt is placed on the second fiberboard layer 302, and the space between the supporting rigid felt and the first fiberboard layer 301 is filled with soft felt 9.

[0038] Furthermore, the stepped hard felt 8 is installed on the fiberboard layer 302.

[0039] The insulation layer structure 1 includes the following core design highlights: the ceramic fiber board layer 3 has high strength characteristics below its operating temperature, providing rigid support for the alumina ceramic sheath 15 covering the electrode blocks at both ends of the heating tube 2; support felt 1 7 and support felt 2 12 are set on the front and rear sides of the graphite sheath 11, providing rigid support for it. The support plate 10 and the stepped hard felt 8 jointly support support felt 2 12. The soft felt 9 is pre-laid and filled on top of the support plate 10, and its thickness is determined by calculating the expansion of the hard felt under high temperature conditions. For example, when the expansion of support felt 1 7 or support felt 2 12 in the length direction is 20 mm, the bottom can be filled with 30 mm of soft felt 9. The principle is that at the position of the graphite sheath 11, the expansion of the hard felt should be approximately equal to the sum of the shrinkage and compression of the soft felt 9. In conjunction with the compression / contraction characteristics of the soft felt 9, the displacement of the graphite sheath 11 under ultra-high temperatures is effectively controlled, ensuring that the vertical gap between it and the heating tube remains at approximately 5-10 mm. The front and rear joints of the supporting hard felt also require filling with soft felt 9, controlled using a similar method to ensure that the horizontal gap between the graphite sheath 11 and the heating tube remains at approximately 5-10 mm. The stepped installation of the stepped hard felt 8 prevents the temperature field from continuously spreading outwards due to the shrinkage of the soft felt 9. The soft felt 9 exhibits shrinkage characteristics at high temperatures. Currently, the highest processing temperature for soft felt 9 material in China is 2400℃, and the heat treatment time at this temperature is not long. When the graphitization furnace operates at temperatures above 2400℃ for extended periods, the soft felt 9 installed flat at the bottom will exhibit significant high-temperature shrinkage. If a stepped structure is not designed at the joints of the soft felt 9, the gap at the joint will gradually widen with accumulated operating time, and this gap expansion will extend along the seam, causing the temperature field to continuously spread outwards.

[0040] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A sag-resistant insulation layer structure for a graphitization furnace, wherein the insulation layer structure is disposed around the muffle cavity (4) of the graphitization furnace used to hold the material to be heated, and the heating pipe (2) that provides heat to the graphitization furnace is respectively mounted on the insulation layer structure at both ends, characterized in that: Includes fiberboard layers (3), rigid felt assembly and soft felt (9); The fiberboard layer (3) forms the frame of the insulation layer structure (1), the heating pipe (2) is installed between the insulation layer structures, and a hard felt assembly is provided on the fiberboard layer (3). The hard felt assembly supports the heating pipe (2) in a preset position, and the rest is filled with soft felt (9) so that the hard felt assembly is kept in the preset position.

2. The anti-sagging insulation layer structure for a graphitization furnace according to claim 1, characterized in that: The rigid felt assembly includes a supporting rigid felt, with supporting rigid felts provided above and below the heating tube (2) to support the heating tube (2) in a preset position.

3. The anti-sagging insulation layer structure for a graphitization furnace according to claim 2, characterized in that: The rigid felt assembly also includes a stepped rigid felt (8), on which a supporting rigid felt is provided on the fiberboard layer (3). The supporting rigid felt and the fiberboard layer (3) are further provided with a stepped rigid felt (8). One side wall of the stepped rigid felt (8) is stepped and contacts the soft felt (9). The other side wall of the stepped rigid felt (8) contacts the supporting rigid felt.

4. The anti-sagging insulation layer structure for a graphitization furnace according to claim 3, characterized in that: At least two sets of supporting hard felts are mounted on one end of a heating tube (2). The ends of the two sets of supporting hard felts are not on the same horizontal plane and are mounted on the same fiberboard layer (3) by a stepped hard felt (8). A support plate (10) is also provided between the set of supporting hard felts far from the fiberboard layer (3) and the stepped hard felt (8).

5. The anti-sagging insulation layer structure for a graphitization furnace according to claim 3, characterized in that: The heating tube (2) is mounted at two predetermined positions by two sets of supporting hard felts at both ends. The ends of the two sets of supporting hard felts are not on the same horizontal plane and are mounted on the same fiberboard layer (3) by stepped hard felts (8). A support plate (10) is also provided between the set of supporting hard felts far from the fiberboard layer (3) and the stepped hard felts (8). One side of the stepped hard felt (8) is on the same horizontal plane except for the bottom layer and abuts against another set of supporting hard felts. The bottom layer of the stepped hard felt (8) supports the set of supporting hard felts. The other side of the stepped hard felt (8) is stepped. The space between the stepped hard felt (8) below both ends of the heating tube (2) is filled with soft felt (9); The space between the supporting rigid felt frame and the fiberboard layer (3) corresponding to each heating tube (2) is filled with soft felt (9).

6. The sag-resistant graphitization furnace insulation structure of claim 1, wherein: Graphite sheaths (11) are wrapped around both ends of the heating tube (2), and the rigid felt assembly is used to support the outside of the graphite sheaths (11).

7. An anti-sag graphitization furnace insulation structure according to claim 2, wherein: The fiberboard layer (3) includes a fiberboard layer one (301) placed vertically on both sides and a fiberboard layer two (302) placed horizontally. The fiberboard layer two (302) is laid at the bottom of the graphitization furnace, and the fiberboard layer one (301) is vertically placed inside the graphitization furnace and is used to support the heating tube (2). The supporting hard felt is placed on the fiberboard layer two (302), and the space between the supporting hard felt and the fiberboard layer one (301) is filled with soft felt (9).

8. An anti-sag graphitization furnace insulation structure according to claim 3, wherein: The stepped hard felt (8) is installed on the second layer of fiberboard (302).

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