High-temperature heating furnace

Abstract

The utility model discloses a high-temperature heating furnace which specifically comprises a furnace shell, a plurality of heating units are arranged in the furnace shell, and the power connection ends of the heating units are located on the same side wall of the furnace shell. The heating unit comprises a first splicing shell, a second splicing shell and a heating element, the power connection end is arranged on the heating element, the first splicing shell is detachably connected with the second splicing shell, and an accommodating space for accommodating the heating element is formed after the first splicing shell and the second splicing shell are connected; and one of the first splicing shell and the second splicing shell is provided with a limiting piece for limiting the heating element from being heated and deformed. The form that the power connection end of the heating element extends out of the side wall of the furnace shell can slow down the problem of rapid aging of the heating wire at the opening of the furnace shell in an external overlarge-temperature-difference environment when the furnace shell is opened, and meanwhile, the detachable heating unit can conveniently extend out of the power connection end of the heating element from the side wall of the furnace shell, so that the heating element is convenient to use. And when each unit part is damaged, maintenance and replacement can be carried out.

Description

Technical Field

[0001] This utility model belongs to the technical field of high-temperature heating equipment, and in particular relates to a high-temperature heating furnace. Background Technology

[0002] A heating furnace is a device that heats materials or workpieces to the rolling or forging temperature. It is widely used in many industries such as petroleum, chemical, metallurgy, materials, and light industry.

[0003] Taking the production of photovoltaic materials as an example, the core part of the material is the heating furnace, where a chemical reaction is carried out under a stable high temperature and high pressure atmosphere to form a diffusion effect on the surface of the predetermined material.

[0004] Currently, the common structure of heating furnaces usually includes a furnace cylinder and heating wires. The furnace cylinder is a whole, and the heating wires extend into the furnace cylinder from the opening. For example, a new type of high temperature bell furnace disclosed in utility model patent application number 202022027354.9 adopts the above-mentioned heating wire setting method. The conventional shape of the heating wires includes U-shaped, wavy, and other forms.

[0005] When using the heating furnace described above, the heating method of the resistance wire can lead to two problems: firstly, uneven heating is likely to occur; secondly, during use, the resistance wire at the furnace inlet and outlet is located at the interface between the furnace and the external environment. This part is prone to a shorter lifespan due to the hot and cold exchange environment during material feeding and discharging, which may result in the need to replace the integrated heating wire. Utility Model Content

[0006] The purpose of this invention is to provide a high-temperature heating furnace to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention adopts a technical solution that includes a furnace shell, wherein a plurality of heating units are provided inside the furnace shell, and the electrical terminals of the plurality of heating units are located on the same side wall of the furnace shell.

[0008] The heating unit includes a first splicing housing, a second splicing housing, and a heating element. The electrical terminal is placed on the heating element. The first splicing housing and the second splicing housing are detachably connected. After the first splicing housing and the second splicing housing are connected, an accommodating space is formed to accommodate the heating element.

[0009] One of the first and second splicing housings is provided with a limiting member to restrict the thermal deformation of the heating element.

[0010] Preferably, the limiting members are evenly distributed along the circumference of the accommodating space.

[0011] Preferably, the heating units are distributed along the length of the furnace shell.

[0012] Preferably, one of the first or second splicing housings has a fitting groove for the power connection end to extend out, and the other has a fitting block that is attached to the power connection end.

[0013] Preferably, the inner wall of the furnace shell is provided with a heat insulation layer.

[0014] Preferably, the furnace shell includes a detachably connected shell one and a shell two.

[0015] Preferably, the side wall of the furnace shell is provided with a wire groove for storing wire harnesses.

[0016] Preferably, the furnace shell is provided with a clearance groove for the electrical terminal of the heating element to extend out.

[0017] Preferably, the furnace shell is provided with a sealing plate that fits against the electrical connection terminal to cover the clearance groove.

[0018] Preferably, the heating wire is made of silicon molybdenum.

[0019] The beneficial effects of this utility model are as follows: In this solution, the form in which the electrical terminal of the heating element extends from the side wall of the furnace shell can alleviate the problem of rapid aging of the heating element at the opening when the furnace shell is opened due to the large temperature difference in the external environment. At the same time, the detachable heating unit can facilitate the extension of the electrical terminal of the heating element from the side wall of the furnace shell, and the setting of the limiting part can prevent the collapse of the heating element after it is deformed by heat.

[0020] In this design, the modular arrangement of the first and second assembly shells facilitates the uniform distribution of heating wires. Furthermore, the inclusion space design effectively prevents the heating elements near the opening from direct contact with the air entering the furnace. Moreover, compared to the current method of scrapping the entire integrated furnace cylinder when it breaks down, this design facilitates the inspection and replacement of the furnace cylinder or heating wires, thus reducing future maintenance costs.

[0021] One of the issues in current photovoltaic heating is that the heating element temperature is generally around 1050℃. This solution uses silicon molybdenum material, which can withstand a maximum temperature of 1700℃, allowing the furnace to reach a higher temperature. Under these conditions, the reaction efficiency in the diffusion reaction in the photovoltaic field can be improved. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the protective sleeve when it is closed in this utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of the protective sleeve when it is opened in this utility model;

[0024] Figure 3 This is an exploded view of the spliced ​​body in this utility model. Figure 1 ;

[0025] Figure 4 This is an exploded view of the spliced ​​body in this utility model. Figure 2 ;

[0026] Figure 5 This is a cross-sectional view of the spliced ​​body in this utility model. Figure 1 ;

[0027] Figure 6 This is a cross-sectional view of the spliced ​​body in this utility model. Figure 2 ;

[0028] In the diagram: 1. Furnace shell; 101. Shell 1; 102. Shell 2; 2. Heating unit; 21. First spliced ​​shell; 211. First vertical surface; 22. Second spliced ​​shell; 221. Snap-fit ​​part; 23. Heating element; 24. Power connection terminal; 3. Accommodating space; 4. Limiting component; 5. Fitting groove; 6. Fitting block; 7. Clearance groove; 8. Cable groove; 9. Wiring assembly; 10. Support leg; 11. Sealing plate. Detailed Implementation

[0029] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0030] Example 1:

[0031] See Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 The furnace includes a furnace shell 1, and a heating unit 2 is provided inside the furnace shell 1. The heating unit 2 includes a first splicing shell 21, a second splicing shell 22, and a heating element 23. The power connection terminal 24 of the heating unit 2 is located on the same side wall of the furnace shell 1. The heating unit 2 includes a first splicing shell 21, a second splicing shell 22, and a heating element 23. The power connection terminal 24 is placed on the heating element 23. The first splicing shell 21 and the second splicing shell 22 are detachably connected. After the first splicing shell 21 and the second splicing shell 22 are connected, an accommodating space 3 is formed to accommodate the heating element 23.

[0032] One of the first splicing shell 21 and the second splicing shell 22 is provided with a limiting member 4 to restrict the thermal deformation of the heating element 23. The limiting member 4 is evenly distributed along the circumference of the accommodating space 3. Specifically, the furnace shell 1 is cylindrical or other regular prismatic shell, with one end open for material feeding. The opening is located at one end of the furnace shell 1 and its plane is perpendicular to the axis of the furnace shell 1. The heating unit 2 is formed by dividing several planes perpendicular to the axis of the furnace shell 1. The first splicing shell 21 and the second splicing shell 22 are also formed by dividing planes perpendicular to the axis of the furnace shell 1. Adjacent heating units 2 can be connected by bolts and connecting plates. The heating element 23 can be made of silicon molybdenum. The first splicing shell 21 and the second splicing shell 22 can be made of high-temperature resistant materials with strong heat insulation effect, such as high-temperature resistant fibers and high-temperature resistant ceramics. The furnace shell 1 can be made of steel.

[0033] Among them, see Figures 3-5 One of the first splicing housing 21 or the second splicing housing 22 is provided with a fitting groove 5 for the extension of the power terminal 24, and the other is provided with a fitting block 6 attached to the power terminal 24. The first splicing housing 21 is stepped, and the second splicing housing 22 is provided with a snap-fit ​​part 221. The snap-fit ​​part 221 is interference-fitted with the first vertical surface 211 of the first splicing housing 21 that connects the two tread surfaces. Of course, the first splicing housing 21 and the second splicing housing 22 can also be connected by bolts and connecting plates, etc., to ensure that the connection between the two is stable. The end face of the first splicing housing 21 is provided with a fitting groove 5 facing downward so that the heating element 23 / power terminal 24 can be inserted. Its shape is consistent with the shape of the heating element 23 / power terminal 24 that it is inserted with. At the same time, the second splicing housing 22 is provided with a fitting block 6 that is used to cooperate with the fitting groove 5, so that the part where the fitting groove 5 is located is sealed after the first splicing housing 21 and the second splicing housing 22 are spliced.

[0034] in, Figure 2 , Figure 3 , Figure 4The furnace shell 1 includes a detachably connected shell 101 and shell 2 102. Several heating units 2 are placed inside shell 101 / shell 2 102, and then shell 101 and shell 2 102 are joined together to cover all heating units 2. Shell 101 and shell 2 102 can be hinged to each other. Support legs 10 are provided on the furnace shell 1 for support. During installation, the first splicing shell 21, heating element 23 and second splicing shell 22 are first assembled and installed. Then, multiple heating units 2 are sequentially installed into the furnace shell 1. After all heating units 2 are installed into the furnace shell 1, it is necessary to ensure that the heating units 2 have an interference fit with the two ends of the inner wall of the furnace shell 1 in the axial direction. This ensures that the heating units 2 are tightly fitted together, thereby reducing heat loss and avoiding safety hazards caused by heat source leakage. Finally, shell 101 and shell 2 102 are spliced ​​together.

[0035] A heat insulation layer (not shown) is provided between the furnace shell 1 and the heating unit 2. The heat insulation layer can be attached to the inner wall of the furnace shell 1, and the heat insulation layer can be made of heat insulation cotton.

[0036] The furnace shell 1 is provided with a relief groove 7 for the heating element 23 to extend the electrical terminal 24, and the furnace shell 1 is provided with a wire groove 8 for storing wire harnesses. The wire groove 8 can be provided with a wire outlet to facilitate the extension and connection of the wire harness.

[0037] In addition, a wiring assembly 9 for fixing the terminals and power cord can be provided on the furnace shell 1, the specific structure of which can be as follows: Figure 1 The above-described structure uses two opposing L-shaped sheet metal pieces and threaded connections to bolt the power cord and the terminal block. Several sets of wiring components 9 can be fixed together on a sealing plate 11. For example, in the case of 9 heating units 2, 3 sets of wiring components 9 can be set on a sealing plate 11, with a total of 3 sealing plates 11. The sealing plates 11 are fixed to the first housing 101 and the second housing 102 respectively to achieve the connection of the entire furnace shell 1. The sealing plates 11 serve to connect and cover the clearance groove 7 to reduce heat loss.

[0038] When assembling the heating furnace of this scheme, the heating element 23 is placed on the lower step surface of the first splicing shell 21. Then, the second splicing shell 22 is spliced ​​with the first splicing shell 21. After a tight fit, a heating unit 2 is spliced. Then, several heating units 2 are placed into the shell 1 101 / shell 2 102. It should be noted that the heating unit 2 and the inner wall of the shell 1 101 / shell 2 102 need to be interference fit to ensure the sealing between the heating units 2. Then, the furnace shell 1 is sealed.

[0039] Example 2:

[0040] Based on the content of Embodiment 2, unlike Embodiment 2, the housing 101 and housing 202 can be completely separated into two parts. The clearance groove 7 is a through hole design opened in the middle of housing 101 or housing 202. During installation, the power terminal 24 of the heating element 23 is inserted through the clearance groove 7. After all the splicing bodies are installed in one housing 101 / housing 202, housing 101 and housing 202 are combined and fixed between housing 202 and housing 202 by welding or other means. Finally, the clearance groove 7 (through hole) is covered by the sealing plate 11 to reduce heat loss.

[0041] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A high-temperature heating furnace, characterized in that: It includes a furnace shell (1), and a plurality of heating units (2) are provided inside the furnace shell (1). The electrical terminals (24) of the plurality of heating units (2) are located on the same side wall of the furnace shell (1). The heating unit (2) includes a first splicing housing (21), a second splicing housing (22), and a heating element (23). The power terminal (24) is placed on the heating element (23). The first splicing housing (21) and the second splicing housing (22) are detachably connected. After the first splicing housing (21) and the second splicing housing (22) are connected, a receiving space (3) for accommodating the heating element (23) is formed. One of the first splicing housing (21) and the second splicing housing (22) is provided with a limiting member (4) to restrict the thermal deformation of the heating element (23).

2. The high-temperature heating furnace according to claim 1, characterized in that: The limiting member (4) is evenly distributed along the circumference of the accommodating space (3).

3. A high-temperature heating furnace according to claim 1, characterized in that: The heating unit (2) is distributed along the length of the furnace shell (1).

4. A high-temperature heating furnace according to claim 1, characterized in that: One of the first splicing housing (21) or the second splicing housing (22) is provided with a fitting groove (5) for the power supply terminal (24) to extend out, and the other is provided with a fitting block (6) attached to the power supply terminal (24).

5. A high-temperature heating furnace according to claim 1, characterized in that: The inner wall of the furnace shell (1) is provided with a heat insulation layer.

6. A high-temperature heating furnace according to claim 1, characterized in that: The furnace shell (1) includes a detachably connected shell one (101) and shell two (102).

7. A high-temperature heating furnace according to claim 1, characterized in that: The side wall of the furnace shell (1) is provided with a wire groove (8) for storing wire harnesses.

8. A high-temperature heating furnace according to claim 1, characterized in that: The furnace shell (1) is provided with a clearance groove (7) for the electrical terminal (24) of the heating element (23) to extend out.

9. A high-temperature heating furnace according to claim 8, characterized in that: The furnace shell (1) is provided with a sealing plate (11) that fits the electrical terminal (24) and is used to cover the clearance groove (7).

10. A high-temperature heating furnace according to claim 1, characterized in that: The heating element (23) is made of silicon molybdenum.

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