Split type furnace body and furnace tube

Abstract

The utility model provides a split type furnace body and a furnace tube, and relates to the technical field of photovoltaic cells. A split type furnace body comprises a connecting piece, a shell, a heat preservation body, a main furnace body of an outer heating body and a branch furnace body, the shell, the heat preservation body and the outer heating body are sequentially arranged from outside to inside, the two ends of the branch furnace body are communicated, one end of the branch furnace body is in butt joint with the opening end of the main furnace body, and the connecting piece is used for tightly connecting the branch furnace body to the opening end of the main furnace body. The furnace tube is provided with the split type furnace body. The furnace body is divided into the main furnace body and the sub-furnace body, and the sub-furnace body is arranged at the opening end of the main furnace body, so that when the structure of the sub-furnace body is damaged, the sub-furnace body can be quickly disassembled and replaced, the maintenance period of the furnace body is shortened, and the maintenance difficulty and cost are reduced; and meanwhile, when the main furnace body / branch furnace body is damaged and cannot be maintained, only the damaged furnace body needs to be replaced, so that the maintenance cost is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of photovoltaic cells, in particular to a split furnace body and a furnace tube. Background Art

[0002] In the field of solar photovoltaic cells, boron diffusion, phosphorus diffusion and other process steps are required. For example, a boron source is diffused on the front of a silicon wafer to form a PN junction on the front of the silicon wafer. The boron source can be BCl3, which reacts with oxygen under high temperature conditions to generate silicon oxide and boron atoms. The boron atoms diffuse into the silicon wafer, changing the conductivity of the silicon surface and forming a PN junction. Similar diffusion processes need to be carried out in a reactor.

[0003] In the existing furnace tube design structure, more heat is dissipated at the end cover at the open end of the furnace tube, and the heat loss of the reaction cavity close to the end cover of the furnace tube is fast. Therefore, the heating element in this part needs to be in a working / load state for a long time to ensure the temperature in the furnace is stable.

[0004] The heating element is in working / load state for a long time, which shortens the service life of the heating element and the heat-insulating fixing structure used to fix the heating element. When the heating element or the heat-insulating fixing structure is damaged and repaired, the existing furnace body structure needs to be dismantled for repair or replacement, which has extremely high maintenance costs. Therefore, a split furnace body is urgently needed to reduce the maintenance cost of the furnace body. Utility Model Content

[0005] The utility model provides a split furnace body, which is divided into an independent main furnace body and a split furnace body structure, thereby reducing the maintenance cost of the furnace body, and also provides a furnace tube with the furnace body structure.

[0006] The technical solution adopted by the utility model is: a split furnace body, including a connecting piece, and a main furnace body and a sub-furnace body which are sequentially provided with an outer shell, a heat-insulating body, and an external heating body from the outside to the inside, the two ends of the sub-furnace body are through-connected, and one end of the sub-furnace body is butted with the open end of the main furnace body, and the connecting piece is used to tightly connect the sub-furnace body to the open end of the main furnace body.

[0007] Optionally, one end of the main furnace body is open and the other end is closed, and the sub-furnace body is provided with one and is butt-jointed with the open end of the main furnace body.

[0008] Optionally, both ends of the main furnace body are connected, and two sub-furnace bodies are provided, and are respectively connected to two open ends of the main furnace body.

[0009] Preferably, the external heating body is detachably connected to the heat-insulating body, and the heat-insulating body is detachably connected to the outer shell.

[0010] Preferably, the external heating body is composed of a plurality of independent annular heating units, and the annular heating units are evenly distributed in the main furnace body and the sub-furnace body, so as to form a plurality of temperature zones in the split furnace body.

[0011] Furthermore, a protective cover and a mounting seat for fixing the terminals of the annular heating units are provided on the outer shell.

[0012] Preferably, a connecting flange is provided at the connecting end of the sub-furnace body and the main furnace body.

[0013] Preferably, a matching concave-convex structure is provided at the connecting end of the sub-furnace body and the main furnace body.

[0014] The present utility model also provides a furnace tube, which includes an outer furnace tube, a furnace cover, and the split furnace body as described above. The outer furnace tube is arranged in the split furnace body, and the furnace cover can cover the open end of the split furnace body, so as to form a sealed cavity in the outer furnace tube.

[0015] Preferably, the furnace tube further includes an inner furnace tube, an internal heating body is provided on the inner furnace tube, the inner furnace tube is arranged in the outer furnace tube, and an annular cavity is formed between the inner furnace tube and the outer furnace tube.

[0016] The present utility model can achieve the following beneficial effects by adopting the above technical solutions:

[0017] By dividing the furnace body into a main furnace body and a sub-furnace body, and arranging the sub-furnace body at the open end of the main furnace body, when the structure of the sub-furnace body is damaged, the sub-furnace body can be quickly disassembled and replaced, shortening the maintenance cycle of the furnace body, and reducing the maintenance difficulty and cost; at the same time, when the main furnace body / sub-furnace body is damaged and cannot be repaired, only the damaged part of the furnace body needs to be replaced, effectively reducing the maintenance cost.

[0018] The furnace tube with a split furnace body structure provided by the present utility model is convenient for maintenance and repair, can effectively shorten the maintenance cycle, and reduce the maintenance cost. Description of the Drawings

[0019] Figure 1 is a three-dimensional structural schematic diagram of the split furnace body in Embodiment 1 of the present application;

[0020] Figure 2 is an internal structural schematic diagram of the split furnace body in Embodiment 2 of the present application;

[0021] Figure 3 is an internal structural schematic diagram of the split furnace body in Embodiment 1 of the present application;

[0022] Figure 4 is an internal structural schematic diagram of the furnace tube with the split furnace body in Embodiment 2 of the present application. In the figure,

[0023] 1. Main furnace body; 11. Heat insulation body; 12. Outer shell; 13. Outer heating body; 14. Protective cover; 2. Sub-furnace body; 3. Connecting piece; 4. Outer furnace tube; 5. Furnace cover; 6. Inner furnace tube; 7. Inner heating body. Specific embodiments

[0024] To facilitate the understanding of the present utility model, the present utility model will be described more comprehensively below with reference to the relevant drawings. The preferred embodiments of the present utility model are given in the drawings. However, the present utility model can be implemented in more different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present utility model more thoroughly and comprehensively understood.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0026] In the existing furnace tube design structure, there is more heat dissipation at the end cover of the opening end of the furnace tube, and the heat loss in the reaction cavity close to the end cover of the furnace tube is fast. Therefore, the heating element in this part needs to be in the working / loading state for a long time to ensure the stability of the furnace temperature. The heating element being in the working / loading state for a long time shortens the service life of the heating element and the heat insulation and fixing structural parts for fixing the heating element; on the other hand, during operations such as loading and unloading at the end cover part, there will be a large temperature change in the opening area, which will significantly shorten the service life of the heating element in the opening area and the heat insulation and fixing structural parts for fixing the heating element. When repairing damaged elements in the opening area of the traditional integrated furnace body structure, the entire furnace body needs to be disassembled for maintenance or replacement, and the maintenance cost is extremely high.

[0027] The present utility model provides a split-type furnace body, including a connecting piece 3, and a main furnace body 1 and a sub-furnace body 2 which are sequentially arranged from outside to inside with an outer shell 12, a heat insulation body 11, and an outer heating body 13. Both ends of the sub-furnace body 2 are through, and one end of the sub-furnace body 2 is butted against the opening end of the main furnace body 1, and the connecting piece 3 is used to tightly connect the sub-furnace body 2 to the opening end of the main furnace body 1.

[0028] The above-mentioned butt joint means that the connecting parts of the main furnace body 1 and the sub-furnace body 2 are matched, and the connecting parts are tightly attached, that is, an integral structure can be formed after the two are butted.

[0029] By dividing the furnace body into a main furnace body 1 and a sub-furnace body 2, the sub-furnace body 2 is arranged at the open end of the main furnace body 1, and the positions of the two are locked by the connecting piece 3, the sub-furnace body 2 replaces the heating section of the traditional furnace body with a faster temperature loss, and can be regarded as an auxiliary heating section. In this way, when the structure of the sub-furnace body 2 is damaged, the damaged sub-furnace body 2 can be disassembled and repaired, which can avoid damaging the internal structure of the main furnace body 1 during the repair process, shorten the maintenance cycle of the furnace body, and reduce the difficulty and cost of maintenance; at the same time, when the main furnace body 1 / sub-furnace body 2 is damaged and cannot be repaired, only the damaged part of the furnace body 2 needs to be replaced, which effectively reduces the maintenance cost.

[0030] In the first embodiment of the present utility model, Figure 2 As shown, the main furnace body 1 is a semi-enclosed structure, that is, one end of the main furnace body 1 is open and the other end is closed. Correspondingly, one sub-furnace body 2 is provided and docked with the open end of the main furnace body 1.

[0031] As a preferred solution, in this embodiment, the heat preservation body 11 on the sub-furnace body 2 is detachably connected to the outer shell 12, and the external heating body 13 is detachably connected to the heat preservation body 11. In this way, when the outer shell 12, the heat preservation body 11, and the external heating body 13 of the sub-furnace body 2 are partially damaged, the damaged parts can be replaced and repaired separately to ensure low maintenance costs. Of course, the outer shell 12, the heat preservation body 11, and the external heating body 13 of the sub-furnace body 2 can also be non-detachable. In this way, after the sub-furnace body 2 is damaged, a new sub-furnace body 2 can be directly used to replace the damaged sub-furnace body 2.

[0032] As a preferred solution, the shell 12 is preferably made of an alloy material, and of course, it can also be made of other metal materials, which is not specifically limited in the present invention; the insulation body 11 is made of a high temperature resistant insulation material, such as aluminum nitride, ceramics, etc., which is not specifically limited in the present invention;

[0033] As a preferred solution, the external heating body 13 in this embodiment is composed of a plurality of independent annular heating units, which are evenly distributed in the main furnace body 1 and the sub-furnace body 2, so that a plurality of temperature zones are formed in the split furnace body. By providing independent annular heating units, when individual independent annular heating units are damaged, the independent annular heating units can be replaced individually, thereby reducing the difficulty and cost of maintenance. In addition, the annular heating units are evenly distributed to form a plurality of insulation zones in the split furnace body, wherein a plurality of constant temperature insulation zones can be provided in the main furnace body 1, and an auxiliary heating zone or an auxiliary heating zone and an insulation zone can be provided in the sub-furnace body 2, so as to facilitate the control and monitoring of the temperature in the split furnace body.

[0034] Of course, in this embodiment, when setting up an independent ring-shaped heating unit, mounting seats for fixing the terminals of the ring-shaped heating unit are synchronously provided on the outer shell 12. These mounting seats are made of insulating materials. By making the mounting seats of insulating materials, electric leakage can be effectively avoided, ensuring production safety. Moreover, these mounting seats are preferably arranged side by side. By installing a protective cover 14 on the outer shell 12, the mounting seats can be hidden under the protective cover 14, further ensuring production safety.

[0035] In addition, to ensure stable docking between the sub-furnace body 2 and the main furnace body 1, a connecting flange is provided at the connecting end of the sub-furnace body 2 and the main furnace body 1. The connecting flange can increase the structural strength of the connecting end of the sub-furnace body 2 and the main furnace body 1. At the same time, locking holes are provided on the connecting flange. By tightening the connecting flange with bolts, stable docking between the sub-furnace body 2 and the main furnace body 1 can be ensured. It should be noted that the connecting flange can also be a connecting flange with a sealing function. That is to say, when using this connecting flange, the airtightness at the docking part of the sub-furnace body 2 and the main furnace body 1 can be ensured, and the heat preservation effect can be improved.

[0036] It should be noted that the above bolts are one way of selecting the connecting member 3. Of course, other connecting members 3 can also be used to lock the sub-furnace body 2 and the main furnace body 1. The present utility model does not make specific limitations on this. For example, the connecting member 3 is a hoop, and the corresponding connecting flange is locked by the hoop.

[0037] When no flange is provided, angle irons can be directly welded on the outer shell 12, and locking holes are provided on the angle irons. By tightening the connecting flange with bolts, stable docking between the sub-furnace body 2 and the main furnace body 1 can be ensured.

[0038] Of course, mutually matching concave and convex structures can also be provided at the connecting end of the sub-furnace body 2 and the main furnace body 1, such as mutually matching stepped structures (as Figure 2 shown), or mutually matching groove and convex ring structures. The present utility model does not make specific limitations on the specific structural forms of the concave and convex structures. Through the cooperation of the concave and convex structures, the heat preservation effect of the docking part can be ensured. The interlocking structure here can be provided on one or more of the heat preservation body 11, the outer shell 12, and the connecting flange, and can be selectively set according to actual needs. When necessary, a high-temperature resistant gasket can be provided at the concave and convex structures.

[0039] The split furnace body provided in the second embodiment of the present utility model, as Figure 1 、 Figure 3 shown. In this embodiment, both ends of the main furnace body 1 are through, and there are two sub-furnace bodies 2, which are respectively docked with the two open ends of the main furnace body 1. For the docking of the main furnace body 1 and the sub-furnace body 2, by analogy with the first embodiment, this embodiment will not be elaborated here.

[0040] For the split furnace body, whether to adopt a through type or a non-through type can be selected according to actual needs.

[0041] The present utility model also provides a furnace tube, which includes a split furnace body as described in Embodiment 1 (not shown in the figure). An outer furnace tube 4 is arranged in the furnace body. The outer furnace tube 4 is hoisted at the top of the furnace body. The split furnace body includes a furnace cover 5 (i.e., the lower furnace door). After the lower furnace door is moved to cover the split furnace body, when the lower furnace door abuts against the lower furnace opening, it also abuts against the outer furnace tube 4 at the same time, so as to form a sealed cavity in the outer furnace tube 4. During operation, the external heating body 13 heats the materials in the sealed cavity through the outer furnace tube 4 and completes the processing process.

[0042] The present utility model also provides another furnace tube, as Figure 4 shown, which includes a split furnace body as described in Embodiment 2. Furnace covers 5 are provided at both the upper and lower ends of the split furnace body. Among them, the upper furnace cover is the top cover, and the top cover is fixedly installed at the upper opening end of the split furnace body. An outer furnace tube 4 is also installed on the top cover. A heat insulation layer is provided between the top cover and the outer furnace tube 4. The bottom of the outer furnace tube 4 extends out of the lower opening end of the split furnace body and is connected to the support flange installed at the lower opening end of the split furnace body. The lower furnace cover is the furnace door. When the furnace door is closed, it abuts against the support flange. In this way, a sealed cavity can be formed in the outer furnace tube 4.

[0043] At the same time, an inner furnace tube 6 is installed in the furnace tube. The inner furnace tube 6 is arranged inside the outer furnace tube 4. An inner heating body 7 is installed inside the inner furnace tube 6. After the furnace door is closed, an annular cavity is formed between the inner furnace tube 6 and the outer furnace tube 4. In this way, when the materials are placed in the annular cavity, the external heating body 13 heats the materials in the sealed cavity through the outer furnace tube 4, and the inner heating body 7 heats the materials in the sealed cavity through the inner furnace tube 6. The materials are heated simultaneously inside and outside, and the heating is more uniform.

[0044] In the present utility model, the furnace tube can be vertical or horizontal, and the utility model does not make specific limitations in this regard. The inner furnace tube 6 and the outer furnace tube 4 can be integrally arranged, that is, the outer edge of the upper end of the inner furnace tube 6 is integrally connected to the inner edge of the upper end of the outer furnace tube 4. In addition, when the inner furnace tube 6 and the outer furnace tube 4 are independently arranged, the inner furnace tube 6 can be a semi-closed structure and can be installed on the upper furnace cover or the lower furnace cover; the inner furnace tube 6 can also be a through-type structure. When the through-type structure is adopted, it is installed on both the upper furnace cover and the lower furnace cover at the same time. At this time, an independent feeding channel and a corresponding small furnace door are provided on the lower furnace cover. The specific shape selection and installation position selection of the inner furnace tube 6 and the outer furnace tube 4 can be selected according to actual needs, and the utility model does not make specific limitations in this regard.

[0045] Although the embodiments of the present utility model have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A split furnace body, characterized in that, It includes a connecting piece (3), and a main furnace body (1) and a sub-furnace body (2) which are provided with a housing (12), a heat-insulating body (11), and an external heating body (13) in sequence from outside to inside. The two ends of the sub-furnace body (2) are through, and one end of the sub-furnace body (2) is butted against the open end of the main furnace body (1). The connecting piece (3) is used to tightly connect the sub-furnace body (2) to the open end of the main furnace body (1).

2. The split furnace body according to claim 1, wherein, One end of the main furnace body (1) is open and the other end is closed. There is one sub-furnace body (2) which is butted against the open end of the main furnace body (1).

3. The split furnace body according to claim 1, characterized in that, Both ends of the main furnace body (1) are through. There are two sub-furnace bodies (2) which are respectively butted against the two open ends of the main furnace body (1).

4. The split furnace body according to claim 1, wherein The external heating body (13) is detachably connected to the heat-insulating body (11), and the heat-insulating body (11) is detachably connected to the housing (12).

5. A split furnace body according to claim 1, characterized in that, The external heating body (13) is composed of a plurality of independent annular heating units which are evenly distributed in the main furnace body (1) and the sub-furnace body (2) so as to form a plurality of temperature zones in the split-type furnace body.

6. The split furnace body according to claim 5, wherein, A protective cover (14) and a mounting seat for fixing the terminals of the annular heating units are provided on the housing (12).

7. A split furnace body according to claim 1, characterized in that, A connecting flange is provided at the connecting end of the sub-furnace body (2) and the main furnace body (1).

8. A split furnace body according to claim 1, characterized in that, A matching concave-convex structure is provided at the connecting end of the sub-furnace body (2) and the main furnace body (1).

9. A furnace tube, characterized in that, It includes an outer furnace tube (4), a furnace cover (5), and the split-type furnace body according to any one of claims 1-8. The outer furnace tube (4) is arranged in the split-type furnace body, and the furnace cover (5) can cover the open end of the split-type furnace body so as to form a sealed cavity in the outer furnace tube (4).

10. A furnace tube according to claim 9, characterized in that, It further includes an inner furnace tube (6) which is provided with an internal heating body (7). The inner furnace tube (6) is arranged in the outer furnace tube (4), and an annular cavity is formed between the inner furnace tube (6) and the outer furnace tube (4).

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