A graphite sintering furnace

Abstract

The present application relates to a graphite sintering furnace having four spliced insulation panels that can be removably spliced to form a square insulation lining. The insulation lining is mounted on a support seat, and an adjustable tightening device abuts and tightens against a second side surface. Multiple adjustable tightening devices are used to tighten the four spliced insulation panels. The spliced insulation panels are, from the outside to the inside, sequentially composed of a first ceramic fiber board layer, an asbestos felt layer, a first graphite felt layer, and a first graphite board layer, with the asbestos felt layer and the first graphite felt layer being filled and disposed between the first ceramic fiber board layer and the first graphite board layer. Only the burned spliced insulation panels need to be replaced, without replacing the entire insulation lining, thereby avoiding waste of a portion (the unburned side) of the insulation lining and reducing the replacement and maintenance costs of the insulation lining. Furthermore, the spliced insulation panels have good thermal insulation performance, thereby improving the thermal insulation performance of the insulation lining and preventing heat dissipation within the insulation lining to the greatest extent possible, thereby resolving related problems in the prior art.

Description

Technical Field

[0001] The present application relates to the technical field of graphite sintering furnaces, and in particular to a graphite sintering furnace. Background Art

[0002] A sintering furnace is a type of furnace that, at high temperatures, causes the solid particles of a ceramic green body to bond with each other, leading to grain growth and a gradual reduction in voids (pores) and grain boundaries. Through the transfer of matter, the overall volume shrinks, the density increases, and ultimately, a dense polycrystalline sintered body with a specific microstructure is formed. Existing sintering furnaces generally use graphite as the insulation lining and graphite heating rods for heating. This type of sintering furnace is called a graphite sintering furnace.

[0003] In traditional graphite sintering furnaces, the insulation lining of the graphite sintering furnace is generally formed by winding multiple layers of carbon felt. The insulation effect of this insulation lining composed of multiple layers of carbon felt is limited and the thermal insulation performance is poor. Therefore, there is serious heat loss in the heating zone of the graphite sintering furnace. The higher the operating temperature of the heating zone, the higher the energy consumption of the graphite sintering furnace, which greatly increases the production cost. The dissipated heat greatly increases the temperature near the graphite sintering furnace, putting the workers in a harsh environment, posing a threat to their health and safety. In addition, the serious heat loss in the heating zone will affect the sintering effect of the product.

[0004] At the same time, since this type of insulation lining is made of multiple layers of carbon felt wrapped around it, this type of insulation lining is an integrated structural component and is usually square in shape. After the graphite sintering furnace has been used for a long time, the carbon felt layer in the insulation lining will inevitably burn out (the carbon felt layer contains tiny pores, and the air in the pores is not easy to be extracted. At the same time, since the graphite sintering furnace is not completely oxygen-free, the part adjacent to the carbon felt layer and the furnace is also easily exposed to oxygen and carbon dioxide. Under high temperature conditions, the carbon felt layer reacts with air or carbon dioxide to produce carbon monoxide. The carbon monoxide produced by the reaction The carbon felt layer will also change from fibrous to powdery, causing it to burn out. Over time, this will also reduce the thermal insulation capacity of the carbon felt layer. When one side of a square insulation furnace lining is burned out while the other side is not, the insulation furnace lining is an integrated structural component and cannot be separated from the adjacent two sides. Therefore, the entire insulation furnace lining must be replaced, including the unburned side. The replaced insulation furnace lining is then scrapped, resulting in the waste of a portion of the insulation furnace lining (the unburned side), leading to high replacement and maintenance costs for the insulation furnace lining. Summary of the Invention

[0005] Based on this, it is necessary to address the problem that the insulation furnace lining in the existing technology is an integrated structural part formed by winding and surrounding multiple layers of carbon felt, which has poor insulation performance, resulting in serious heat loss in the heating zone of the graphite sintering furnace. When one side of the insulation furnace lining is burned while the other side is not burned, the entire insulation furnace lining can only be replaced, resulting in waste of part of the insulation furnace lining (the side without burnt), leading to high replacement and maintenance costs of the insulation furnace lining. The present application provides a graphite sintering furnace, which can complete the replacement of the spliced insulation plates by adjusting the tightening degree of the spliced insulation plates by an adjustable tightening device, that is, complete the replacement and maintenance of the insulation furnace lining, and only the burned spliced insulation plates need to be replaced, without replacing the entire insulation furnace lining, thereby avoiding the waste of a part of the insulation furnace lining (the non-burned side), thereby reducing the replacement and maintenance cost of the insulation furnace lining. At the same time, the spliced insulation plates have good thermal insulation performance, so that the insulation furnace lining has good thermal insulation performance, which can prevent heat dissipation in the insulation furnace lining to the greatest extent, and thus can solve the relevant problems in the prior art.

[0006] A graphite sintering furnace, comprising a furnace drum, a plurality of adjustable tightening devices and four spliced insulation plates, the inner wall of the furnace drum is provided with a support seat and a plurality of mounting seats, the four spliced insulation plates can be detachably spliced to form a square insulation furnace lining, the insulation furnace lining is mounted on the support seat, the insulation furnace lining has a first side surface in contact with the support seat and three second side surfaces, the first side surface and the three second side surfaces enclose the circumferential outer side surface of the insulation furnace lining, and the plurality of adjustable tightening devices are mounted on the plurality of mounting seats in a one-to-one correspondence. , the adjustable tightening device is abutted against the second side surface, and each of the second side surfaces is abutted with multiple adjustable tightening devices. The multiple adjustable tightening devices are used to tighten four of the spliced insulation boards to form the insulation furnace lining. In the direction from the outside to the inside of the insulation furnace lining, the spliced insulation boards are successively a first ceramic fiber board layer, an asbestos felt layer, a first graphite felt layer and a first graphite board layer, and the asbestos felt layer and the first graphite felt layer are filled between the first ceramic fiber board layer and the first graphite board layer.

[0007] Preferably, the above-mentioned graphite sintering furnace further includes a furnace door and an insulation door, wherein the insulation door is arranged on one side of the furnace door, and the furnace door can be sealed and covered on the port of the furnace barrel. When the furnace door is sealed and covered on the port of the furnace barrel, the insulation door covers the port of the insulation furnace lining, and the insulation furnace lining and the insulation door are enclosed to form a heating space, and a heating device is provided in the heating space.

[0008] Preferably, in the above-mentioned graphite sintering furnace, in the direction of the thermal insulation door toward the heating space, the thermal insulation door is sequentially composed of a second ceramic fiber board layer, a second graphite felt layer and a second graphite board layer, and the second graphite felt layer is filled and arranged between the second ceramic fiber board layer and the second graphite board layer.

[0009] Preferably, in the above-mentioned graphite sintering furnace, a reflective heat insulation film is bonded to the inner wall of the first graphite plate layer facing away from the first graphite felt layer and / or the inner wall of the second graphite plate layer facing away from the second graphite felt layer.

[0010] Preferably, in the above-mentioned graphite sintering furnace, the insulation door includes a main body and a raised portion protruding from the main body toward the heating space. When the furnace door seal is covered on the port of the furnace barrel, the main body covers the port of the insulation furnace lining, and the raised portion is located inside the insulation furnace lining and fits against the inner wall of the insulation furnace lining.

[0011] Preferably, in the above-mentioned graphite sintering furnace, the mounting seat includes a connecting section connected to the inner wall of the furnace barrel and a mounting section for installing the adjustable tightening device, the mounting section is provided with a through hole, and the adjustable tightening device includes a tightening plate, a screw rod and two nuts, one end of the screw rod is connected to the tightening plate, and the other end passes through the through hole, the nut is threadedly engaged with the screw rod, and the nuts are provided on both sides of the mounting section, the mounting section is clamped between the two nuts located on both sides thereof, and the tightening plate abuts against the second side surface.

[0012] Preferably, in the above-mentioned graphite sintering furnace, the splicable insulation plates are provided with splicing steps, and under the tightening action of the adjustable tightening device, four splicable insulation plates are spliced through the splicing steps to form the insulation furnace lining.

[0013] Preferably, the above-mentioned graphite sintering furnace further includes an elastic sealing strip, and a sealing groove is provided on the splicing step. When four splicable insulation boards are spliced together to form the insulation furnace lining, the sealing grooves on two adjacent adjustable tightening devices are arranged relative to each other, and the elastic sealing strip is compressed and clamped in the sealing groove.

[0014] Preferably, in the above-mentioned graphite sintering furnace, at least two sealing grooves are provided on the splicing step, and among the at least two sealing grooves, the opening directions of two of the sealing grooves are perpendicular to each other.

[0015] Preferably, in the above-mentioned graphite sintering furnace, the four corners of the second side surface are all in contact with the adjustable tightening device.

[0016] The technical solution adopted in this application can achieve the following beneficial effects:

[0017] In a graphite sintering furnace disclosed in an embodiment of the present application, four spliced insulation plates are spliced together under the tightening action of multiple adjustable tightening devices to form an insulation furnace lining. When one of the spliced insulation plates is burned out and needs to be replaced, it is only necessary to adjust the tightening degree of the spliced insulation plate by the adjustable tightening device so that the adjustable tightening device leaves the second side. At this time, the four spliced insulation plates are simply placed together by gravity, and the spliced insulation plate that needs to be replaced due to burnout can be replaced effortlessly. After replacement, the adjustable tightening device can be readjusted to tighten the spliced insulation plate. The tightening degree of the plate is adjusted so that the adjustable tightening device rests on the second side surface and is re-spliced to form the insulation furnace lining. In the graphite sintering furnace with this structure, the spliced insulation plates can be replaced by adjusting the tightening degree of the spliced insulation plates by the adjustable tightening device, that is, the replacement and maintenance of the insulation furnace lining are completed, making the replacement and maintenance of the insulation furnace lining very convenient, and only the burned spliced insulation plates need to be replaced, without replacing the entire insulation furnace lining, avoiding the waste of a part of the insulation furnace lining (the non-burned side), thereby reducing the replacement and maintenance cost of the insulation furnace lining. At the same time, the heat insulation performance of the spliced insulation board is good, so that the heat insulation performance of the insulation furnace lining is good, which can prevent the heat dissipation in the insulation furnace lining to the greatest extent, avoid serious heat loss in the insulation furnace lining, thereby avoiding the increase in energy consumption of the graphite sintering furnace and effectively reducing production costs. At the same time, it reduces the heat loss near the graphite sintering furnace, avoids the staff in a harsh environment, and prevents the lost heat from posing a threat to the health and safety of the staff. When the heat loss in the insulation furnace lining is less, the temperature in the insulation furnace lining is more stable, which improves the sintering quality of the product and prevents the sintering effect of the product from being affected by serious heat loss in the heating zone, thereby solving the relevant problems in the existing technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of a graphite sintering furnace disclosed in an embodiment of the present application;

[0019] Figure 2 This is a schematic diagram of a graphite sintering furnace disclosed in an embodiment of the present application with its door open;

[0020] Figure 3 This is a schematic diagram of a graphite sintering furnace disclosed in an embodiment of the present application with its door open from another perspective;

[0021] Figure 4 This is a partial structural diagram of a graphite sintering furnace disclosed in an embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of a partial structural cross-section of a graphite sintering furnace disclosed in an embodiment of the present application;

[0023] Figure 6This is another schematic cross-sectional view of a partial structure of a graphite sintering furnace disclosed in an embodiment of the present application;

[0024] Figure 7 for Figure 6 A partial enlarged schematic diagram;

[0025] Figure 8 This is another cross-sectional schematic diagram of a partial structure of a graphite sintering furnace disclosed in an embodiment of the present application;

[0026] Figure 9 A schematic diagram of a splicable insulation board disclosed in an embodiment of the present application;

[0027] Figure 10 for Figure 9 A partial enlarged schematic diagram.

[0028] Among them: furnace drum 100, support seat 110, mounting seat 120, connecting section 121, mounting section 122, adjustable tightening device 200, tightening plate 210, screw rod 220, nut 230, splicable insulation plate 300, first ceramic fiber board layer 310, asbestos felt layer 320, first graphite felt layer 330, first graphite board layer 340, splicing step 350, sealing groove 360, furnace door 400, insulation door 500, second ceramic fiber board layer 510, second graphite felt layer 520, second graphite board layer 530, main body 540, protrusion 550, heating space 600, elastic sealing strip 700. DETAILED DESCRIPTION

[0029] To facilitate understanding of the present application, a more comprehensive description of the present application will be provided below with reference to the accompanying drawings. The accompanying drawings illustrate preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and comprehensive understanding of the disclosure of the present application.

[0030] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be an element centered thereon. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an element centered thereon. The terms "vertical," "horizontal," "left," "right," "top," "bottom," "bottom end," "top end," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this application pertains. The terms used herein in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Please refer to Figures 1 to 10 The present embodiment discloses a graphite sintering furnace, comprising a furnace drum 100, a plurality of adjustable tightening devices 200, and four splicable insulation plates 300, wherein:

[0033] The furnace drum 100 is the furnace shell of the graphite sintering furnace, which is usually a two-layer structure with a cooling jacket in the middle. The inner wall of the furnace drum 100 is provided with a support base 110 and a plurality of mounting bases 120. Specifically, the support base 110 and the plurality of mounting bases 120 can be welded to the inner wall of the furnace drum 100. The four splicable insulation panels 300 can be removably spliced to form a square insulation furnace lining, and the insulation furnace lining is installed on the support seat 110. The insulation furnace lining has a first side surface in contact with the support seat 110 and three second side surfaces. The first side surface and the three second side surfaces together constitute the circumferential outer side surface of the insulation furnace lining, that is, the four splicable insulation panels 300 each have an outer side surface. Since the insulation furnace lining is installed on the support seat 110, the outer side surface of one of the splicable insulation panels 300 is in contact with the support seat 110, which is the first side surface, and the outer sides of the other three splicable insulation panels 300 are the three second sides. The outer sides of the four splicable insulation panels 300 together constitute the circumferential outer side surface of the insulation furnace lining, so the first side surface and the three second side surfaces together constitute the circumferential outer side surface of the insulation furnace lining.

[0034] The adjustable tightening device 200 is installed on the mounting seat 120, and multiple adjustable tightening devices 200 correspond to multiple mounting seats 120 one by one, that is, each mounting seat 120 is installed with an adjustable tightening device 200, the adjustable tightening device 200 abuts against the second side surface, and each second side surface abuts against multiple adjustable tightening devices 200. The multiple adjustable tightening devices 200 are used to tighten the four spliced insulation boards 300, and the four spliced insulation boards 300 are spliced to form an insulation furnace lining under the tightening action of the multiple adjustable tightening devices 200. Please refer again Figure 6The lower side of the four spliced insulation panels 300 is a support base 110, and the upper side, left side and right side of the four spliced insulation panels 300 are each provided with an adjustable tightening device 200, so that the four spliced insulation panels 300 can be abutted against each other and spliced together to form an insulation furnace lining. At the same time, the four spliced insulation panels 300 can also be fixed in the furnace barrel 100. The adjustable tightening device 200 has an adjustment function, and the degree of tightening can be adjusted. Under the tightening action of multiple adjustable tightening devices 200, the four spliced insulation panels 300 overlap and approach each other to form an insulation furnace lining. By adjusting the degree of tightening of the spliced insulation panels 300 by the adjustable tightening device 200, the four spliced insulation panels 300 can be tightly spliced, avoiding looseness or large gaps at the splicing, which leads to poor insulation effect.

[0035] During the specific installation process, first place the first spliceable insulation board 300 on the support seat 110, then place the other three spliceable insulation boards 300 on the first spliceable insulation board 300 by gravity, and then install the adjustable tightening device 200 on the mounting seat 120 so that the adjustable tightening device 200 rests on the second side surface, and then continuously adjust the tightening degree of the adjustable tightening device 200 on the spliceable insulation board 300 so that the four spliceable insulation boards 300 are spliced together to form an insulation furnace lining, and the splicing is tight. During the specific disassembly process, it is only necessary to adjust the tightening degree of the adjustable tightening device 200 on the spliced insulation board 300 so that the adjustable tightening device 200 leaves the second side. At this time, the four spliced insulation boards 300 are simply leaning against each other by gravity, and one of the spliced insulation boards 300 can be taken and replaced effortlessly. Therefore, when one of the four spliced insulation boards 300 is burned, the burned spliced insulation board 300 can be replaced and then reinstalled, which makes the replacement and maintenance of the insulation furnace lining very convenient.

[0036] In the direction from the outside to the inside of the insulation furnace lining, the insulation board 300 can be spliced in sequence as the first ceramic fiber board layer 310, the asbestos felt layer 320, the first graphite felt layer 330 and the first graphite board layer 340, and the asbestos felt layer 320 and the first graphite felt layer 330 are filled and arranged between the first ceramic fiber board layer 310 and the first graphite board layer 340. The spliced insulation board 300 is composed of multiple layers of materials with thermal insulation functions, and the high-temperature resistance of each thermal insulation layer gradually increases from the outside to the inside. On the one hand, it prevents heat dissipation to the greatest extent, makes the temperature in the insulation furnace lining more stable, and improves the sintering quality of the product. On the other hand, the first graphite plate layer 340 of the inner layer has good high-temperature resistance and can meet the requirements of high-temperature sintering in the insulation furnace lining. After the first graphite plate layer 340 of the inner layer is insulated, the temperature of the outer layer is reduced, so the high-temperature resistance requirements of the thermal insulation layer of the outer layer are reduced. The spliced insulation board 300 with this structure is more scientific and reasonable, which is conducive to reducing equipment costs.

[0037] At the same time, the first ceramic fiber board layer 310 and the first graphite board layer 340 form a hard thermal insulation layer, the asbestos felt layer 320 and the first graphite felt layer 330 form a flexible thermal insulation layer, and the flexible thermal insulation layer is filled between the hard thermal insulation layers. This arrangement can ensure that the flexible thermal insulation layer is filled more solidly, tightly and densely, thereby improving the thermal insulation performance, and avoiding the use of all flexible thermal insulation layers, which leads to poor structural stability of the spliced insulation board 300, thereby ensuring the structural stability of the spliced insulation board 300.

[0038] In a graphite sintering furnace disclosed in an embodiment of the present application, four spliced insulation plates 300 are spliced together under the tightening action of multiple adjustable tightening devices 200 to form an insulation furnace lining. When one of the spliced insulation plates 300 is burned out and needs to be replaced, it is only necessary to replace it by adjusting the tightening degree of the adjustable tightening device 200 on the spliced insulation plates 300 so that the adjustable tightening device 200 leaves the second side. At this time, the four spliced insulation plates 300 are simply leaned against each other by gravity, and the spliced insulation plates 300 that need to be replaced due to burnout can be replaced effortlessly. After replacement, the adjustable tightening device 200 is readjusted to The degree of tightening of the spliced insulation plate 300 can be adjusted so that the adjustable tightening device 200 rests on the second side surface, and the insulation furnace lining is re-spliced to form the insulation furnace lining. In the graphite sintering furnace with this structure, the spliced insulation plate 300 can be replaced by adjusting the degree of tightening of the spliced insulation plate 300 by the adjustable tightening device 200, that is, the replacement and maintenance of the insulation furnace lining can be completed, making the replacement and maintenance of the insulation furnace lining very convenient, and only the burned spliced insulation plate 300 needs to be replaced, without replacing the entire insulation furnace lining, thereby avoiding the waste of a part of the insulation furnace lining (the non-burned side), thereby reducing the replacement and maintenance cost of the insulation furnace lining. At the same time, the heat insulation performance of the spliced insulation board 300 is good, so that the heat insulation performance of the insulation furnace lining is good, which can prevent the heat dissipation in the insulation furnace lining to the greatest extent, avoid serious heat loss in the insulation furnace lining, thereby avoiding the increase in energy consumption of the graphite sintering furnace and effectively reducing production costs. At the same time, it reduces the heat loss near the graphite sintering furnace, avoids the staff in a harsh environment, and prevents the lost heat from posing a threat to the health and safety of the staff. When the heat loss in the insulation furnace lining is small, the temperature in the insulation furnace lining is more stable, the sintering quality of the product is improved, and the sintering effect of the product is affected by the serious heat loss in the heating zone, thereby solving the relevant problems in the existing technology.

[0039] Preferably, a graphite sintering furnace disclosed in the present application may further include a furnace door 400 and an insulation door 500. The insulation door 500 is arranged on one side of the furnace door 400. The furnace door 400 can be sealed and covered on the port of the furnace drum 100. When the furnace door 400 is sealed and covered on the port of the furnace drum 100, the insulation door 500 covers the port of the insulation furnace lining. That is to say, the insulation door 500 moves with the furnace door 400. When the insulation door 500 covers the port of the insulation furnace lining, the insulation furnace lining and the insulation door 500 are enclosed to form a heating space 600. A heating device is provided in the heating space 600. The product to be sintered is placed in the heating space 600, and the product is sintered under the heating of the heating device. When the furnace door 400 is sealed and covers the port of the furnace drum 100, the thermal insulation door 500 covers the port of the thermal insulation furnace lining. The thermal insulation door 500 also has a heat insulation function. By covering the port of the thermal insulation furnace lining with the thermal insulation door 500, the heat in the heating space 600 is prevented from being lost through the port of the thermal insulation furnace lining, so that the inner wall of the heating space 600 has a heat insulation function, thereby further avoiding excessive heat loss in the heating space 600, further preventing heat loss in the thermal insulation furnace lining, and avoiding serious heat loss in the thermal insulation furnace lining.

[0040] As described above, the thermal insulation door 500 also has thermal insulation functions. Optionally, in the direction of the thermal insulation door 500 toward the heating space 600, the thermal insulation door 500 is sequentially composed of a second ceramic fiber board layer 510, a second graphite felt layer 520, and a second graphite board layer 530, with the second graphite felt layer 520 filling and disposed between the second ceramic fiber board layer 510 and the second graphite board layer 530. Similar to the thermal insulation principle of the splicable thermal insulation board 300, this configuration can improve the thermal insulation performance of the thermal insulation door 500. By covering the port of the thermal insulation furnace lining with the thermal insulation door 500, the heat within the heating space 600 can be prevented from escaping to the greatest extent, avoiding serious heat loss and resource waste. The thermal insulation effect is good, thereby improving the sintering quality of the product and reducing the power consumption of the graphite sintering furnace.

[0041] Preferably, the inner wall of the first graphite plate layer 340 facing away from the first graphite felt layer 330 can be bonded with a reflective insulation film. This film achieves insulation by reflecting infrared heat, thereby reducing heat transfer to the first graphite plate layer 340. This in turn reduces heat loss at the source, further improving the thermal insulation performance of the insulated furnace lining. Of course, the inner wall of the second graphite plate layer 530 facing away from the second graphite felt layer 520 can also be bonded with a reflective insulation film. Specifically, the reflective insulation film can be graphite paper, which has excellent high-temperature resistance and a smooth, mirror-like surface that can reflect infrared heat to achieve insulation.

[0042] As described above, the insulation door 500 covers the port of the insulation furnace lining, thereby preventing heat within the heating space 600 from being lost through the port of the insulation furnace lining, thereby further preventing excessive heat loss in the heating space 600. Preferably, the insulation door 500 may include a body portion 540 and a raised portion 550 protruding from the body portion 540 toward the heating space 600. When the furnace door 400 is sealed and covers the port of the furnace drum 100, the body portion 540 covers the port of the insulation furnace lining, and the raised portion 550 is located within the insulation furnace lining and in contact with the inner wall of the insulation furnace lining. By having the raised portion 550 fit against the inner wall of the insulation furnace lining, and the main body 540 covering the port of the insulation furnace lining, these two methods improve the degree of coverage between the insulation door 500 and the port of the insulation furnace lining, so that the insulation door 500 can more completely block the port of the insulation furnace lining, avoiding the presence of a gap between the two and causing heat loss, thereby further preventing the heat in the heating space 600 from being lost through the port of the insulation furnace lining, thereby further preventing excessive heat loss in the heating space 600.

[0043] Preferably, the thickness of the spliceable insulation panel 300 can be 100 mm to 120 mm, with the thickness of the first graphite felt layer 330 being greater than 50 mm. The first graphite felt layer 330 has high thermal insulation performance and is inexpensive to manufacture. This configuration increases the proportion of the first graphite felt layer 330 in the spliceable insulation panel 300, thereby helping to reduce the cost of the spliceable insulation panel 300 without affecting the insulation performance of the spliceable insulation panel 300.

[0044] As described above, by adjusting the degree of tightening of the adjustable tightening device 200 on the splicable insulation board 300, the adjustable tightening device 200 can be tightened against the second side or away from the second side. Specifically, the mounting seat 120 may include a connecting section 121 connected to the inner wall of the furnace drum 100 and a mounting section 122 for mounting the adjustable tightening device 200. The mounting section 122 is provided with a through hole. The adjustable tightening device 200 includes a tightening plate 210, a screw rod 220 and two nuts 230. One end of the screw rod 220 is connected to the tightening plate 210, and the other end passes through the through hole. The nut 230 is threadedly engaged with the screw rod 220. There are nuts 230 on both sides of the mounting section 122. The mounting section 122 is sandwiched between the two nuts 230 located on both sides thereof, and the tightening plate 210 is pressed against the second side. By rotating the two nuts 230 to change the positions of the two nuts 230 on the screw rod 220, the length of the screw rod 220 between the mounting section 122 and the second side surface is adjusted, thereby adjusting the magnitude of the tightening force applied by the tightening plate 210 to the second side surface, thereby adjusting the tightening degree of the adjustable tightening device 200 on the spliced insulation board 300. The adjustable tightening device 200 of this structure is simple in structure. Compared with electric, hydraulic, and pneumatic telescopic rods, due to the harsh conditions (high temperature) of the furnace drum 100, electric, hydraulic, and pneumatic telescopic rods have poor stability at high temperatures and are prone to failure. The adjustable tightening device 200 disclosed in this application is a mechanical structure, which is convenient for installation in the furnace drum 100 and has high reliability and stability.

[0045] In the present application, four splicable insulation panels 300 are spliced together to form an insulation furnace lining under the tightening action of multiple adjustable tightening devices 200. The four splicable insulation panels 300 need to withstand forces from different directions of up, down, left and right. In order to enable the four splicable insulation panels 300 to be stably spliced together under the action of force, in an optional embodiment, the splicable insulation panels 300 may be provided with a splicing step 350. Under the tightening action of the adjustable tightening device 200, the four splicable insulation panels 300 are spliced together through the splicing step 350 to form an insulation furnace lining. Through the splicing steps 350, the four splicable insulation panels 300 can be stably spliced together under the action of force, with high stability, and the splicing steps 350 can also play a positioning role, so that the splicing accuracy of the four splicable insulation panels 300 is high. At the same time, after the splicing is formed into the insulation furnace lining through the splicing steps 350, the contact area of the splicing is increased, which helps to improve the sealing of the splicing, and when the heat in the insulation furnace lining is dissipated through the splicing, the splicing steps 350 can make the heat dissipation path longer and more tortuous, which helps to improve the insulation of the splicing, avoid a large amount of heat being lost through the splicing, and improve the insulation performance of the insulation furnace lining.

[0046] Preferably, a graphite sintering furnace disclosed in the present application may further include an elastic sealing strip 700, and a sealing groove 360 is opened on the splicing step 350. When four splicable insulation boards 300 are spliced together to form an insulation furnace lining, the sealing grooves 360 on two adjacent adjustable tightening devices 200 are arranged relative to each other, and the elastic sealing strip 700 is compressed and clamped in the sealing groove 360. By arranging the elastic sealing strip 700 at the splicing, the sealing of the splicing can undoubtedly be further improved, and the insulation of the splicing can be improved, thereby improving the sealing and insulation performance of the insulation furnace lining.

[0047] Specifically, at least two sealing grooves 360 can be formed on the splicing step 350. Providing at least two sealing grooves 360 increases the number of elastic sealing strips 700 provided at the splicing location, undoubtedly further improving the sealing performance of the splicing, as well as the thermal insulation performance of the splicing location, further enhancing the sealing and thermal insulation performance of the insulated furnace lining. Furthermore, the opening directions of at least two sealing grooves 360 are perpendicular to each other, so that the splicing location has elastic sealing strips 700 with perpendicular sealing directions, further improving the sealing and thermal insulation performance of the splicing location.

[0048] In order to improve the tightening effect of the adjustable tightening device 200 on the joint and avoid poor sealing and heat preservation at the joint due to poor tightening effect, in an optional embodiment, the four corners of the second side face are all abutted with the adjustable tightening device 200, so that the adjustable tightening device 200 has a better tightening effect on the joint and improves the sealing and heat preservation of the joint.

[0049] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0050] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A graphite sintering furnace, characterized in that: The invention comprises a furnace drum (100), a plurality of adjustable top tightening devices (200) and four splicable insulation boards (300), wherein the inner wall of the furnace drum (100) is provided with a support seat (110) and a plurality of mounting seats (120), and the four splicable insulation boards (300) are detachably spliced to form a square insulation furnace lining, and the insulation furnace lining is mounted on the support seat (110), and the insulation furnace lining has a first side surface and three second side surfaces in contact with the support seat (110), and the first side surface and the three second side surfaces enclose a circumferential outer side surface of the insulation furnace lining, and the plurality of adjustable top tightening devices (200) are mounted on the plurality of mounting seats (120) in a one-to-one correspondence, and the adjustable top tightening devices (200) abuts against and presses against the second side surface, and each of the second side surfaces is abutted against a plurality of the adjustable pressing devices (200), and the plurality of the adjustable pressing devices (200) are used to press against four pieces of the splicable insulation boards (300) to splice and form the insulation furnace lining. In the direction from the outside to the inside of the insulation furnace lining, the splicable insulation boards (300) are sequentially a first ceramic fiber board layer (310), an asbestos felt layer (320), a first graphite felt layer (330) and a first graphite board layer (340), and the asbestos felt layer (320) and the first graphite felt layer (330) are filled and arranged between the first ceramic fiber board layer (310) and the first graphite board layer (340); The mounting seat (120) includes a connecting section (121) connected to the inner wall of the furnace drum (100) and a mounting section (122) for mounting the adjustable tightening device (200), wherein the mounting section (122) is provided with a through hole, and the adjustable tightening device (200) includes a tightening plate (210), a screw rod (220) and two nuts (230), wherein one end of the screw rod (220) is connected to the tightening plate (210) and the other end passes through the through hole, and the nut (230) is threadedly engaged with the screw rod (220), and both sides of the mounting section (122) have the nuts (230), and the mounting section (122) is sandwiched between the two nuts (230) located on both sides thereof, and the tightening plate (210) is abutted against the second side surface.

2. A graphite sintering furnace according to claim 1, characterized in that: The invention also includes a furnace door (400) and a heat-insulating door (500), wherein the heat-insulating door (500) is arranged on one side of the furnace door (400), and the furnace door (400) can be sealed and covered on the port of the furnace barrel (100). When the furnace door (400) is sealed and covered on the port of the furnace barrel (100), the heat-insulating door (500) covers the port of the heat-insulating furnace lining, and the heat-insulating furnace lining and the heat-insulating door (500) are enclosed to form a heating space (600), and a heating device is arranged in the heating space (600).

3. A graphite sintering furnace according to claim 2, characterized in that: In the direction of the thermal insulation door (500) toward the heating space (600), the thermal insulation door (500) is sequentially composed of a second ceramic fiber board layer (510), a second graphite felt layer (520), and a second graphite board layer (530), and the second graphite felt layer (520) is filled and arranged between the second ceramic fiber board layer (510) and the second graphite board layer (530).

4. A graphite sintering furnace according to claim 3, characterized in that: A reflective heat-insulating film is bonded to the inner wall of the first graphite plate layer (340) facing away from the first graphite felt layer (330) and / or the inner wall of the second graphite plate layer (530) facing away from the second graphite felt layer (520).

5. The graphite sintering furnace according to claim 2, characterized in that: The thermal insulation door (500) includes a main body (540) and a raised portion (550) raised from the main body (540) toward the heating space (600). When the furnace door (400) is sealed and covered on the port of the furnace barrel (100), the main body (540) covers the port of the thermal insulation furnace lining, and the raised portion (550) is located in the thermal insulation furnace lining and is in contact with the inner wall of the thermal insulation furnace lining.

6. The graphite sintering furnace according to claim 1, characterized in that: The splicable insulation panels (300) are provided with splicing steps (350), and under the tightening action of the adjustable tightening device (200), four splicable insulation panels (300) are spliced together via the splicing steps (350) to form the insulation furnace lining.

7. The graphite sintering furnace according to claim 6, characterized in that: It also includes an elastic sealing strip (700), and a sealing groove (360) is provided on the splicing step (350). When four splicable insulation boards (300) are spliced together to form the insulation furnace lining, the sealing grooves (360) on two adjacent adjustable tightening devices (200) are arranged opposite to each other, and the elastic sealing strip (700) is compressed and clamped in the sealing groove (360).

8. The graphite sintering furnace according to claim 7, characterized in that: At least two sealing grooves (360) are provided on the splicing step (350), and among the at least two sealing grooves (360), the opening directions of two of the sealing grooves (360) are perpendicular to each other.

9. The graphite sintering furnace according to claim 1, characterized in that: The four corners of the second side surface are all in contact with the adjustable tightening device (200).

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