Improved graphite radiant heater

Abstract

This utility model relates to the field of radiant heating device technology, and in particular to an improved graphite radiant heater, comprising an mounting layer and a graphite resistance wire disc disposed directly below the mounting layer. The graphite resistance wire disc is formed by continuously bending and folding a single graphite resistance wire into a planar spiral disc structure. Electrode posts extending upwards through the mounting layer are fixedly connected to both ends of the graphite resistance wire disc. In this utility model, the original graphite resistance wire disc structure has been scientifically and rationally improved. Both the graphite resistance wire disc and the electrode posts are coated with a SiC coating. Simultaneously, a heat insulation layer, an energy-concentrating layer, an inner cover, and an outer cover are provided between the mounting layer and the graphite resistance wire disc, forming a reinforcing layer on the outer surface of the graphite radiant heater. This effectively improves the oxidation resistance and high-temperature resistance of the graphite radiant heater. Combined with the multi-layered heat insulation mechanism, the heating effect and service life of the graphite radiant heater are comprehensively improved.

Description

Technical Field

[0001] This utility model relates to the field of radiation heating device technology, and in particular to an improved graphite radiation heater. Background Technology

[0002] Currently, various high-temperature heating technologies are available, such as induction heating, graphite heating, plasma heating, flame heating, and SiC heating. Among these, graphite heating offers advantages such as high temperature, high purity, simple equipment structure, low environmental requirements, and no harmonic interference, making it widely used in manufacturing industries such as optical fibers and polycrystalline silicon. However, existing graphite heaters also suffer from drawbacks in their design, including low resistance distribution, susceptibility to burn-out, uneven heating, difficulty in controlling resistance, susceptibility to oxidation, and inability to withstand high temperatures. They are particularly unsuitable for long-term heating in high-oxygen-pressure environments. SiC heating offers advantages such as oxidation resistance and high-temperature resistance, but its high cost makes it uneconomical.

[0003] In view of this, it is particularly important to design and manufacture a graphite radiant heater that can combine the advantages of graphite and SiC and improve the heater's oxidation resistance and high temperature resistance. This is especially important in the design, manufacturing and practical use of graphite radiant heaters. Utility Model Content

[0004] The purpose of this invention is to address the problems of poor oxidation resistance and high-temperature resistance of graphite radiant heaters with single material properties, which are prone to burnout and uneven heating during actual use. Therefore, an improved graphite radiant heater is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: An improved graphite radiant heater includes an mounting layer and a graphite resistance wire disc disposed directly below the mounting layer. The graphite resistance wire disc is formed by continuously bending and folding a single graphite resistance wire into a planar spiral disc structure. Both ends of the graphite resistance wire disc are fixedly connected to electrode posts that extend upward through the mounting layer. A reinforcing layer is provided on the outside of the graphite resistance wire disc and the electrode posts to enhance the heater's oxidation resistance and high-temperature resistance. A heat insulation mechanism is provided between the lower end of the mounting layer and the upper end of the graphite resistance wire disc, and between the mounting layer and the outer end of the graphite resistance wire disc, to enhance the heater's radiation effect and thermal efficiency.

[0006] As a further description of the above technical solution: The reinforcing layer is a SiC coating applied to the outer surface of the graphite resistance wire disk and the electrode post.

[0007] As a further description of the above technical solution: The heat insulation mechanism includes a heat insulation layer installed below the mounting layer, an energy-concentrating layer installed below the heat insulation layer and above the graphite resistance wire disk, and an inner cover and an outer cover installed between the mounting layer and the outside of the graphite resistance wire disk via a sliding insert.

[0008] As a further description of the above technical solution: The sliding part includes multiple mounting tabs that are fixed to the outer side of the upper end of the heat insulation layer by screws and extend outward through the inner cover and the outer cover, and mounting slots that are opened on the inner cover and the outer cover and engage with the multiple mounting tabs.

[0009] As a further description of the above technical solution: An insulating ceramic cylinder is fixedly connected between the two ends of the mounting layer, the heat insulation layer, and the energy-concentrating layer, located on the outside of the electrode post.

[0010] As a further description of the above technical solution: The upper end of the electrode post is fixedly connected to a terminal block by a fixing nut.

[0011] As a further description of the above technical solution: A temperature measuring base is installed at the upper middle part of the mounting layer, and a ceramic armored thermocouple facing the graphite resistance wire disc is installed at the lower end of the temperature measuring base.

[0012] As a further description of the above technical solution: Two mounting brackets are symmetrically installed on the left and right sides of the upper end of the mounting layer.

[0013] As a further description of the above technical solution: Fixed rope seats are fixedly connected to the four corners of the upper end of the mounting layer. Traction ropes are fixedly connected between the lower ends of the four fixed rope seats and below the graphite resistance wire disc. The lower end of the traction rope is fitted with a hollow ceramic rod that abuts against the lower end surface of the graphite resistance wire disc.

[0014] In summary, due to the adoption of the above technical solution, the beneficial effects of this utility model are: In this invention, the original graphite resistance wire disc structure has been scientifically and rationally improved. Both the graphite resistance wire disc and the electrode post are coated with a SiC coating. A heat insulation layer, an energy-concentrating layer, an inner cover, and an outer cover are placed between the mounting layer and the graphite resistance wire disc. By continuously bending and folding the graphite resistance wire disc into a planar spiral disc structure, the heating surface of the graphite resistance wire disc becomes more compact, reducing problems such as low resistance distribution and uneven heating. Simultaneously, the SiC coating on the outer surface of the graphite resistance wire disc gives it the characteristics of a SiC heater, effectively improving its oxidation resistance, high-temperature resistance, and burn-out resistance. This structure forms a reinforcing layer on the outer surface of the graphite irradiation heater, effectively improving its oxidation resistance and high-temperature resistance. Combined with the multi-layered heat insulation mechanism, the heating effect and service life of the graphite irradiation heater are comprehensively improved. Attached Figure Description

[0015] Figure 1 This is a three-dimensional top view of an improved graphite radiant heater proposed in this utility model; Figure 2 This is a three-dimensional upward view of the present invention; Figure 3 This is a three-dimensional disassembly diagram of the present invention.

[0016] Legend: 1. Mounting layer; 101. Insulation layer; 102. Energy-concentrating layer; 103. Insulating ceramic cylinder; 104. Terminal block; 105. Fixing nut; 106. Mounting bracket; 2. Graphite resistance wire disc; 201. Electrode post; 3. Inner cover; 4. Outer cover; 5. Mounting slot; 6. Mounting lever; 7. Fixing rope seat; 701. Hollow ceramic rod; 702. Traction rope; 8. Temperature measuring base; 801. Ceramic armored thermocouple. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-3This utility model provides a technical solution: an improved graphite radiant heater, including an installation layer 1 and a graphite resistance wire disk 2 disposed directly below the installation layer 1. The graphite resistance wire disk 2 is formed by continuously bending and folding a whole graphite resistance wire into a planar spiral disk structure. Both ends of the graphite resistance wire disk 2 are fixedly connected to electrode posts 201 that penetrate upward through the installation layer 1. The graphite resistance wire disk 2 and the electrode posts 201 are provided with a reinforcing layer to improve the heater's anti-oxidation and high-temperature resistance. A heat insulation mechanism to improve the heater's radiation effect and thermal efficiency is provided between the lower end of the installation layer 1 and the upper end of the graphite resistance wire disk 2, and between the installation layer 1 and the outer end of the graphite resistance wire disk 2.

[0019] Specifically, such as Figure 1-3 As shown, the reinforcing layer is a SiC coating applied to the outer surfaces of the graphite resistance wire disk 2 and the electrode post 201. This SiC reinforcing layer can effectively prevent the outer surface of the graphite resistance wire disk 2 from being directly exposed to the external environment. At the same time, it can effectively improve the oxidation resistance and high temperature resistance of the graphite resistance wire disk 2, thereby comprehensively improving the heating effect of the graphite resistance wire disk 2 and extending its service life.

[0020] Specifically, such as Figure 1-3 As shown, the heat insulation mechanism includes a heat insulation layer 101 installed below the mounting layer 1, an energy-concentrating layer 102 installed below the heat insulation layer 101 and above the graphite resistance wire disk 2, and an inner cover 3 and an outer cover 4 installed between the mounting layer 1 and the outer side of the graphite resistance wire disk 2 via a sliding insert. The heat insulation layer 101 and the energy-concentrating layer 102 form two heat insulation barriers between the graphite resistance wire disk 2 and the mounting layer 1, which can effectively reduce the upward conduction and dissipation of heat. The inner cover 3 and the outer cover 4 form two heat insulation barriers around the outer periphery of the graphite resistance wire disk 2, which can prevent the heat from the graphite resistance wire disk 2 from diffusing outward. At the same time, in conjunction with the heat insulation layer 101 and the energy-concentrating layer 102, the heat is directed downward and concentrated below the graphite radiation heater, thereby improving the thermal efficiency of the graphite radiation heater.

[0021] The sliding part includes multiple mounting tabs 6 that are fixed to the outer side of the upper end of the heat insulation layer 101 by screws and extend outward through the inner cover 3 and the outer cover 4, and mounting slots 5 that are opened on the inner cover 3 and the outer cover 4 and engage with the multiple mounting tabs 6. The multiple mounting tabs 6 can be adjusted by adjusting the tightness of the screws to achieve lateral sliding adjustment and fixed-point operation. When the mounting tabs 6 slide outward into the reserved mounting slots 5 of the inner cover 3 and the outer cover 4, the inner cover 3 and the outer cover 4 can be supported and fixed between the mounting layer 1 and the outside of the graphite resistance wire disc 2.

[0022] Specifically, such as Figure 1-3As shown, an insulating ceramic cylinder 103 is fixedly connected to both ends of the mounting layer 1, the heat insulation layer 101, and the energy focusing layer 102, located outside the electrode post 201. On the one hand, the mounting layer 1, the heat insulation layer 101, and the energy focusing layer 102 can be combined and fixed. On the other hand, it provides a channel for the electrode post 201 to be inserted and installed, which can prevent the electrode post 201 from directly contacting the mounting layer 1, the heat insulation layer 101, and the energy focusing layer 102, thereby improving the heat insulation and insulation effect of the electrode post 201 installed between the mounting layer 1, the heat insulation layer 101, and the energy focusing layer 102. The upper end of the electrode post 201 is fixedly connected to a terminal 104 by screwing in a fixing nut 105. The terminal 104 is provided to facilitate the establishment of a circuit connection between the external cable and the electrode post 201.

[0023] Specifically, such as Figure 1-3 As shown, a temperature measuring seat 8 is installed at the upper middle part of the mounting layer 1, and a ceramic armored thermocouple 801 facing the graphite resistance wire disk 2 is installed at the lower end of the temperature measuring seat 8. In the working state, the working temperature of the graphite resistance wire disk 2 can be monitored in real time, so that the operator can understand the working temperature of the graphite radiation heater and dynamically adjust the heating temperature of the graphite radiation heater.

[0024] Specifically, such as Figure 1 As shown, two mounting brackets 106 are symmetrically installed on the left and right sides of the upper end of the mounting layer 1, which facilitates the overall suspension of the graphite radiation heater on the upper inner side of the electric heating furnace.

[0025] Specifically, such as Figure 1-3 As shown, four fixed rope seats 7 are fixedly connected to the upper corners of the mounting layer 1. Traction ropes 702 are fixedly connected between the lower ends of the four fixed rope seats 7 and below the graphite resistance wire disc 2. The lower end of the traction rope 702 has a hollow ceramic rod 701 that abuts against the lower end face of the graphite resistance wire disc 2. In actual use, the hollow ceramic rod 701 can be inserted under the traction rope 702 and then pressed against the lower end face of the graphite resistance wire disc 2. Then the end of the traction rope 702 is fixed to the fixed rope seat 7, so that the graphite resistance wire disc 2 can be supported and fixed below the mounting layer 1, thereby comprehensively improving the effect of the graphite radiation heater assembly after fixing.

[0026] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An improved graphite radiant heater, comprising a mounting layer (1) and a graphite resistance wire disk (2) disposed directly below the mounting layer (1), characterized in that, The graphite resistance wire disc (2) is a planar spiral disc structure formed by continuously bending and folding a whole graphite resistance wire. Both ends of the graphite resistance wire disc (2) are fixedly connected to electrode posts (201) that penetrate upward through the mounting layer (1). The graphite resistance wire disc (2) and the electrode posts (201) are provided with a reinforcing layer to enhance the antioxidant and high temperature resistance of the heater. A heat insulation mechanism to enhance the radiation effect and thermal efficiency of the heater is provided between the lower end of the mounting layer (1) and the upper end of the graphite resistance wire disc (2) and between the mounting layer (1) and the outer end of the graphite resistance wire disc (2).

2. The improved graphite radiant heater according to claim 1, characterized in that, The reinforcing layer is a SIC coating applied to the outer surfaces of the graphite resistance wire disk (2) and the electrode post (201).

3. The improved graphite radiant heater according to claim 1, characterized in that, The heat insulation mechanism includes a heat insulation layer (101) installed below the mounting layer (1), an energy-concentrating layer (102) installed below the heat insulation layer (101) and above the graphite resistance wire disk (2), and an inner cover (3) and an outer cover (4) installed between the mounting layer (1) and the outside of the graphite resistance wire disk (2) by means of a sliding insert.

4. The improved graphite radiant heater according to claim 3, characterized in that, The sliding part includes a plurality of mounting tabs (6) that are fixed to the outer side of the upper end of the heat insulation layer (101) by screw adjustment and extend outward through the inner cover (3) and the outer cover (4), and mounting slots (5) that are opened on the inner cover (3) and the outer cover (4) and engage with the plurality of mounting tabs (6).

5. The improved graphite radiant heater according to claim 3, characterized in that, An insulating ceramic cylinder (103) is fixedly connected between the two ends of the mounting layer (1), the heat insulation layer (101) and the energy-concentrating layer (102) on the outside of the electrode post (201).

6. The improved graphite radiant heater according to claim 1, characterized in that, The upper end of the electrode post (201) is fixedly connected to a terminal block (104) by screwing in a fixing nut (105).

7. The improved graphite radiant heater according to claim 1, characterized in that, A temperature measuring seat (8) is installed at the upper middle part of the mounting layer (1), and a ceramic armored thermocouple (801) facing the graphite resistance wire disc (2) is installed at the lower end of the temperature measuring seat (8).

8. The improved graphite radiant heater according to claim 1, characterized in that, Two mounting brackets (106) are symmetrically installed on the left and right sides of the upper end of the mounting layer (1).

9. A modified graphite radiant heater according to claim 1, characterized in that, Fixed rope seats (7) are fixedly connected to the four corners of the upper end of the mounting layer (1). Traction ropes (702) are fixedly connected between the lower ends of the four fixed rope seats (7) and below the graphite resistance wire disc (2). A hollow ceramic rod (701) that abuts against the lower end surface of the graphite resistance wire disc (2) is slidably sleeved at the lower end of the traction rope (702).

Images