High-temperature heating furnace

Abstract

The high-temperature heating furnace 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] The invention belongs to the technical field of high-temperature heating equipment, and in particular relates to a high-temperature heating furnace. Background Art

[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 industry, 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, in which a diffusion effect is formed on the surface of the predetermined material through chemical reactions in a stable high-temperature and high-pressure atmosphere.

[0004] At present, the common structure of a heating furnace usually includes a furnace barrel and a heating wire. The furnace barrel is an integral whole, and the heating wire extends from the opening of the furnace barrel into the furnace barrel. For example, a new high-temperature bell-shaped furnace disclosed in the invention patent with application number 202022027354.9 adopts the above-mentioned heating wire setting method, wherein the conventional shapes of the heating wire include U-shaped, wavy, etc.

[0005] The heating furnace of the above-mentioned form is affected by the setting method of the resistance wire when in use. Firstly, uneven heating is prone to occur. Secondly, during use, the resistance wire at the inlet and outlet of the furnace is at the junction of the furnace and the external environment. This part is prone to have a short service life in the hot and cold exchange environment of the inlet and outlet materials, so that the integrated heating wire needs to be replaced. Summary of the invention

[0006] The object of the present invention is to provide a high temperature heating furnace to solve the problems raised in the above background technology.

[0007] To achieve the above object, a technical solution adopted by the present invention is: comprising a furnace shell, wherein a plurality of heating units are arranged in the furnace shell, and the power connection ends of the plurality of heating units are located on the same side wall of the furnace shell;

[0008] The heating unit comprises a first spliced ​​shell, a second spliced ​​shell and a heating element, the electrical connection terminal is placed on the heating element, the first spliced ​​shell and the second spliced ​​shell are detachably connected, and the first spliced ​​shell and the second spliced ​​shell are connected to form an accommodating space for accommodating the heating element;

[0009] One of the first spliced ​​shell and the second spliced ​​shell is provided with a limiting member for limiting the deformation of the heating element due to heat.

[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 direction of the furnace shell.

[0012] Preferably, one of the first splicing shell or the second splicing shell is provided with an engaging groove for the electrical terminal to extend out, and the other is provided with an engaging block attached to the electrical terminal.

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

[0014] Preferably, the furnace shell includes a shell 1 and a shell 2 which are detachably connected.

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

[0016] Preferably, the furnace shell is provided with an avoidance groove for the power connection end of the heating element to extend out.

[0017] Preferably, the furnace shell is provided with a sealing plate which is arranged in close contact with the power connection end and is used to shield the avoidance groove.

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

[0019] Beneficial effects of the present invention: In the present solution, the power connection end of the heating element extends from the side wall of the furnace shell, which can alleviate the problem of rapid aging of the heating element at the opening in an external environment with a large temperature difference when the furnace shell is opened. At the same time, the detachable heating unit can facilitate the extension of the power connection end of the heating element from the side wall of the furnace shell, and the setting of the limiter can prevent the collapse of the heating element after being deformed by heat.

[0020] The arrangement of the assembled first and second spliced ​​shells in this solution is conducive to the uniform layout of the heating wires. At the same time, the arrangement of the accommodating space allows the heating element located near the opening to effectively avoid direct contact with a large area of ​​air entering the heating furnace. Moreover, compared with the overall scrapping of the current integrated furnace drum when it breaks down, the design of this solution is also convenient for the inspection and replacement of the furnace drum or the heating wire, which can reduce the subsequent maintenance costs.

[0021] Among them, currently in the heating of the photovoltaic circle, the heating temperature of the heating element is generally around 1050°C. This solution uses silicon-molybdenum material that can withstand a high temperature of up to 1700°C, so that the furnace can reach a higher temperature. In this case, the reaction efficiency can be improved in the diffusion reaction in the photovoltaic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the casing when it is closed in the present invention;

[0023] Figure 2 It is a schematic diagram of the overall structure when the casing is opened in the present invention;

[0024] Figure 3 This is a schematic diagram of the explosion of the spliced ​​body in the present invention. Figure 1 ;

[0025] Figure 4 This is a schematic diagram of the explosion of the spliced ​​body in the present invention. Figure 2 ;

[0026] Figure 5 It is a cross-sectional view of the splicing body in the present invention Figure 1 ;

[0027] Figure 6 It is a cross-sectional view of the splicing body in the present invention Figure 2 ;

[0028] In the figure: 1, furnace shell; 101, shell one; 102, shell two; 2, heating unit; 21, first spliced ​​shell; 211, first vertical surface; 22, second spliced ​​shell; 221, clamping part; 23, heating element; 24, power terminal; 3, accommodating space; 4, limiting member; 5, fitting groove; 6, fitting block; 7, avoidance groove; 8, wire trough; 9, wiring assembly; 10, support leg; 11, sealing plate. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention are described in detail below in conjunction with 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 protection scope of the present invention.

[0030] Embodiment 1:

[0031] See also Figure 1 , Figure 2 , Figure 3 , Figure 5 , Figure 6 , comprising a furnace shell 1, a heating unit 2 is arranged in the furnace shell 1, the heating unit 2 comprises a first spliced ​​shell 21, a second spliced ​​shell 22 and a heating element 23, an electric terminal 24 of the heating unit 2 is located on the same side wall of the furnace shell 1, the heating unit 2 comprises a first spliced ​​shell 21, a second spliced ​​shell 22 and a heating element 23, the electric terminal 24 is placed on the heating element 23, the first spliced ​​shell 21 and the second spliced ​​shell 22 are detachably connected, and the first spliced ​​shell 21 and the second spliced ​​shell 22 are connected to form an accommodating space 3 for accommodating the heating element 23;

[0032] One of the first spliced ​​shell 21 and the second spliced ​​shell 22 is provided with a limiter 4 for limiting the deformation of the heating element 23 due to heat, and the limiter 4 is evenly distributed along the circumference of the accommodating space 3. Specifically, the furnace shell 1 is cylindrical or other regular prismatic shell, one end of which is open for the feeding of materials, and the opening is placed at one end of the furnace shell 1 and the plane in which it is located is perpendicular to the axis of the furnace shell 1. The heating unit 2 is formed by dividing a plurality of planes perpendicular to the axis of the furnace shell 1, wherein the first spliced ​​shell 21 and the second spliced ​​shell 22 are also formed by dividing a plane perpendicular to the axis of the furnace shell 1, and adjacent heating units 2 can be connected by bolts in combination with connecting plates, the heating element 23 can be made of silicon-molybdenum material, the first spliced ​​shell 21 and the second spliced ​​shell 22 can be selected from high-temperature resistant materials with strong heat insulation effect such as high-temperature resistant fibers and high-temperature resistant ceramics for use in combination, and the furnace shell 1 can be made of steel structure.

[0033] Among them, see Figure 3-Figure 5 , one of the first splicing shell 21 or the second splicing shell 22 is provided with an engaging groove 5 for the electrical terminal 24 to extend out, and the other is provided with an engaging block 6 attached to the electrical terminal 24. The first splicing shell 21 is stepped, and the second splicing shell 22 is provided with a clamping portion 221, and the clamping portion 221 is interference fit with the first vertical surface 211 connecting the two treads on the first splicing shell 21. Of course, the first splicing shell 21 and the second splicing shell 22 can also be connected by bolts and connecting plates to ensure that the connection between the two is stable. Among them, an engaging groove 5 is provided downward on the end surface of the first splicing shell 21 to facilitate the insertion of the heating element 23 / electrical terminal 24, and its shape is consistent with the shape of the heating element 23 / electrical terminal 24 overlapped therewith. At the same time, an engaging block 6 used to cooperate with the engaging groove 5 is provided on the second splicing shell 22, so that the part where the engaging groove 5 is located is sealed after the first splicing shell 21 and the second splicing shell 22 are spliced.

[0034] in, Figure 2 , Figure 3 , Figure 4The furnace shell 1 includes a detachably connected shell 101 and a second shell 102. After a number of heating units 2 are placed in the shell 101 / shell 2 102, the shell 101 and the shell 2 102 are spliced ​​together to cover all the heating units 2. The shell 101 and the shell 2 102 can be hinged to each other. A support leg 10 is provided on the furnace shell 1 for support. During installation, the first spliced ​​shell 21, the heating element 23 and the second spliced ​​shell 22 are first assembled and installed, and then the multiple heating units 2 are sequentially loaded into the furnace shell 1. After all the heating units 2 are installed in the furnace shell 1, it is necessary to ensure that the heating units 2 have an interference fit relationship with the two ends of the inner wall of the furnace shell 1 in the axial direction, so as to ensure the close fit between the heating units 2, thereby reducing heat loss and avoiding the safety hazards caused by the leakage of heat sources. Subsequently, the shell 101 and the shell 2 102 are spliced ​​together.

[0035] Wherein, a heat-insulating layer (not shown) is provided between the furnace shell 1 and the heating unit 2. The heat-insulating layer can be attached to the inner wall of the furnace shell 1, and heat-insulating cotton can be selected for the heat-insulating layer.

[0036] The furnace shell 1 is provided with an avoidance groove 7 for the power terminal 24 of the heating element 23 to extend out, and the furnace shell 1 is provided with a wire groove 8 for storing the wire harness, and 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 wiring terminal and the power line can also be provided on the furnace shell 1, and its specific structure can be Figure 1 The above structure fixes the power cord and the terminal through two relatively arranged L-shaped sheet metals and bolts threadedly connected to the sheet metal, wherein several groups of wiring components 9 can be fixed together on a sealing plate 11. For example, in the case of 9 heating units 2, 3 groups of wiring components 9 can be arranged on a sealing plate 11, and a total of 3 sealing plates 11 are arranged. The sealing plates 11 are respectively fixed to the shell 1 101 and the shell 2 102 to realize the connection of the entire furnace shell 1, wherein the sealing plate 11 plays the role of connecting and covering the avoidance groove 7 to reduce heat loss.

[0038] When assembling the heating furnace of the present scheme, the heating element 23 is placed on the lower tread of the first spliced ​​shell 21, and then the second spliced ​​shell 22 is spliced ​​with the first spliced ​​shell 21. After a tight fit, a heating unit 2 is spliced, and then several heating units 2 are placed into shell one 101 / shell two 102. It should be noted that it is necessary to ensure that the heating unit 2 and the inner wall of shell one 101 / shell two 102 are in an interference fit relationship to ensure the sealing between the heating units 2, and then the furnace shell 1 can be closed.

[0039] Embodiment 2:

[0040] Based on the contents described in the second embodiment, different from the second embodiment, the shell 101 and the shell 2 102 can be a structure that is completely separated into two parts, and the avoidance groove 7 is a through-hole design opened in the middle of the shell 101 or the shell 2 102. During installation, the power connection end 24 of the heating element 23 is inserted through the avoidance groove 7. After all the spliced ​​bodies are installed in one shell 101 / shell 2 102, the shell 1 101 and the shell 2 102 are combined, and the fixation between the shell 2 102 and the shell 2 102 can be realized by welding or the like. Finally, the avoidance groove 7 (through-hole) is covered by installing the sealing plate 11 to reduce heat loss.

[0041] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structural transformations made using the contents of the present invention's specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A high-temperature heating furnace, comprising a furnace shell (1), wherein a plurality of heating units (2) are arranged in the furnace shell (1), and power connection 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) comprises a first spliced ​​shell (21), a second spliced ​​shell (22) and a heating element (23); the power connection terminal (24) is placed on the heating element (23); the first spliced ​​shell (21) and the second spliced ​​shell (22) are detachably connected; and after the first spliced ​​shell (21) and the second spliced ​​shell (22) are connected, an accommodating space (3) for accommodating the heating element (23) is formed; One of the first spliced ​​shell (21) and the second spliced ​​shell (22) is provided with a limiting member (4) for limiting the deformation of the heating element (23) due to heat.

2. A high temperature heating furnace according to claim 1, characterized in that: The limiting members (4) are 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 units (2) are distributed along the length direction of the furnace shell (1).

4. A high temperature heating furnace according to claim 1, characterized in that: One of the first spliced ​​shell (21) or the second spliced ​​shell (22) is provided with an engaging groove (5) for the electrical terminal (24) to extend out, and the other is provided with an engaging block (6) attached to the electrical 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-insulating layer.

6. A high temperature heating furnace according to claim 1, characterized in that: The furnace shell (1) comprises a detachably connected shell body 1 (101) and a detachably connected shell body 2 (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 accommodating a wire harness.

8. A high temperature heating furnace according to claim 1, characterized in that: The furnace shell (1) is provided with an avoidance groove (7) for the power connection end (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) which is arranged in contact with the power connection terminal (24) and is used to shield the avoidance groove (7).

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

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