Low-power arc high-temperature smelting furnace
By designing a low-power electric arc high-temperature melting furnace, which utilizes a ceramic shell and graphite electrodes to generate an electric arc for high-temperature melting, the high cost and short lifespan of high-temperature melting in existing technologies are solved, achieving a low-cost and high-efficiency high-temperature melting effect.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-09
- Publication Date
- 2026-03-03
AI Technical Summary
Existing resistive and electromagnetic heating electro-thermal converters are difficult to achieve high-temperature melting efficiently, and are also costly and have a short service life.
The low-power electric arc high-temperature melting furnace utilizes a ceramic shell, anode electrode, and cathode electrode design to generate temperatures above 1000 degrees Celsius through electric arc heating. The ceramic shell has insulation and thermal conductivity, while the anode and cathode electrodes are made of graphite material. The electric arc is generated between the anode and cathode electrodes and conducts heat through the ceramic shell.
It achieves high-temperature melting at lower power, is low-cost and has a long service life, avoids electrode leakage and dielectric damage, and improves heating efficiency and equipment durability.
Smart Images
Figure CN223965864U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electric arc heating technology, and in particular to a low-power electric arc high-temperature melting furnace. Background Technology
[0002] When electricity is needed for high-temperature smelting in industrial or commercial applications, an electric-to-heat converter with a high conversion rate is required.
[0003] In existing technologies, resistive heating electro-thermal converters have a characteristic: if long-term high-temperature heating is required without melting the resistance wire, the cross-section of the resistance wire needs to be increased. Based on the conductivity properties of metallic materials, the cross-section of the resistance wire is inversely proportional to its resistance. When the cross-section of the resistance wire increases, the resistance decreases, resulting in a larger current during operation and a proportional amplification of the heating power. To control the current, the length of the resistance wire needs to be increased. However, ordinary resistance wires are difficult to convert into high-power heat in a small volume, requiring a large or multi-stage electro-thermal converter. This makes the manufacturing process of the electro-thermal converter complex and costly, and the converter itself also requires a large amount of electrical energy to heat up.
[0004] In existing technologies, electromagnetic heating electro-to-heat converters generate heat by passing an electromagnetic field through a magnetic iron product. However, due to the property that iron demagnetizes above 600 degrees Celsius, electromagnetic heating electro-to-heat converters are unlikely to generate temperatures above 600 degrees Celsius.
[0005] Therefore, the currently used resistive heating and electromagnetic heating electro-thermal converters are difficult to achieve high-temperature melting efficiently.
[0006] In conclusion, the existing structure obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content
[0007] To address the aforementioned shortcomings, the purpose of this utility model is to provide a low-power electric arc high-temperature melting furnace that can generate temperatures above 1000 degrees Celsius for melting when heated electrically, and is also low in cost and has a long service life.
[0008] To achieve the above objectives, this utility model provides a low-power electric arc high-temperature melting furnace, including a ceramic shell, an anode electrode, and a cathode electrode; the ceramic shell includes an inner wall and an outer wall; a melting chamber is formed inside the inner wall;
[0009] A first inner cavity adapted to the anode electrode is formed between the inner and outer walls of one end of the ceramic shell along the axial direction; the anode electrode is fastened in the first inner cavity; a second inner cavity adapted to the cathode electrode is formed between the inner and outer walls of the other end of the ceramic shell along the axial direction; the cathode electrode is fastened in the second inner cavity; the first inner cavity and the second inner cavity are in communication, and there is a preset distance between the first anode electrode and the first cathode electrode.
[0010] According to the low-power electric arc high-temperature melting furnace described above, the ceramic outer shell is cylindrical.
[0011] According to the low-power electric arc high-temperature melting furnace described above, the anode electrode is ring-shaped; the first inner cavity is ring-shaped to match the anode electrode;
[0012] The cathode electrode is conical at one end facing the anode electrode and cylindrical at the other end; the second inner cavity is cylindrical to match the cathode electrode.
[0013] According to the low-power electric arc high-temperature melting furnace described above, multiple cathode electrodes are provided, and the multiple cathode electrodes form a ring; multiple second inner cavities are provided corresponding to the cathode electrodes, and the multiple second inner cavities are arranged sequentially along the circumference of the ceramic shell.
[0014] According to the low-power electric arc high-temperature melting furnace described above, the outer wall located between the first inner cavity and the second inner cavity protrudes toward the inner wall to form an annular first limiting ring;
[0015] A second limiting ring is located between the first inner cavity and the second inner cavity, with the inner wall protruding towards the outer wall to form a ring shape; the two end faces of the second limiting ring in the axial direction are respectively flush with the two end faces of the first limiting ring in the axial direction;
[0016] The end of the anode electrode facing the cathode electrode abuts against one end of the first limiting ring and one end of the second limiting ring;
[0017] The end of the cathode electrode facing the anode electrode abuts against the other end of the first limiting ring and the second limiting ring;
[0018] There is an arc forming space between the first limiting ring and the second limiting ring.
[0019] According to the low-power electric arc high-temperature melting furnace described above, the ceramic shell is an alumina ceramic shell.
[0020] According to the low-power electric arc high-temperature melting furnace described above, the anode electrode is made of graphite material; the cathode electrode is made of graphite material.
[0021] This utility model discloses a low-power electric arc high-temperature melting furnace that achieves arc heating, generating an electric arc at a relatively low power (total power not exceeding 3500 watts, which can also be used with ordinary household electricity). The arc releases heat to generate a high temperature of over 1000 degrees Celsius for melting, and the temperature release is rapid. Furthermore, the generation of the arc does not require a connecting medium; only the anode and cathode electrodes are needed to discharge and generate the arc, avoiding the impact on service life caused by damage to the connecting medium. The low-power electric arc high-temperature melting furnace includes a ceramic shell, an anode electrode, and a cathode electrode. The ceramic shell is insulating, preventing leakage from the anode and cathode electrodes located inside. The ceramic shell also has good thermal conductivity; the surface temperature of the ceramic shell heated by the electric arc can reach over 1000 degrees Celsius, allowing the heat released by the arc generated by the anode and cathode electrodes to be conducted to the melting chamber through the inner wall of the ceramic shell. The ceramic shell has sufficient hardness to prevent cracking and leakage during use. The ceramic shell includes an inner wall and an outer wall; a melting chamber is formed inside the inner wall, where the object to be melted is placed for melting. Specifically, a first inner cavity adapted to the anode electrode is formed between the inner and outer walls of one axial end of the ceramic shell, and the anode electrode is securely installed in the first inner cavity; a second inner cavity adapted to the cathode electrode is formed between the inner and outer walls of the other axial end of the ceramic shell, and the cathode electrode is securely installed in the second inner cavity; the first inner cavity and the second inner cavity are connected, and there is a preset distance between the first anode electrode and the first cathode electrode, so that when the anode electrode and the cathode electrode are energized, an electric arc can be generated between the anode electrode and the cathode electrode. Therefore, this invention can achieve melting at temperatures above 1000 degrees Celsius with relatively low power when using electric heating, and it is low in cost and has a long service life. Attached Figure Description
[0022] Figure 1 This is a cross-sectional view of a low-power electric arc high-temperature melting furnace provided in an embodiment of the present invention;
[0023] Figure 2 This is a schematic diagram of the structure of the ceramic shell with the first inner cavity provided in an embodiment of the present invention;
[0024] Figure 3 This is a schematic diagram of the structure of the ceramic shell with the second inner cavity provided in an embodiment of the present invention;
[0025] Figure 4 This is a schematic diagram of the structure of the anode electrode provided in one embodiment of the present invention;
[0026] Figure 5 This is a schematic diagram of the structure of a cathode electrode provided in one embodiment of the present invention. Detailed Implementation
[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.
[0028] In the description of this application, it should be understood that if terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0029] See Figures 1-5 In one embodiment of the present invention, a low-power electric arc high-temperature melting furnace 100 is provided, including a ceramic shell 10, an anode electrode 20 and a cathode electrode 30; the ceramic shell 10 includes an inner wall 11 and an outer wall 12; a melting chamber 13 is provided inside the inner wall 11;
[0030] A first inner cavity 14 adapted to the anode electrode 20 is formed between the inner wall 11 and the outer wall 12 at one end of the ceramic shell 10 along the axial direction; the anode electrode 20 is fastened in the first inner cavity 14; a second inner cavity 15 adapted to the cathode electrode 30 is formed between the inner wall 11 and the outer wall 12 at the other end of the ceramic shell 10 along the axial direction; the cathode electrode 30 is fastened in the second inner cavity 15; the first inner cavity 14 and the second inner cavity 15 are connected, and there is a preset distance between the first anode electrode 20 and the first cathode electrode 30.
[0031] In this embodiment, the low-power electric arc high-temperature melting furnace 100 can generate high temperatures of over 1000 degrees Celsius while using electricity to heat the furnace at a relatively low total power (not exceeding 3500 watts). The anode electrode 20 and cathode electrode 30 are respectively disposed in the first inner cavity 14 and the second inner cavity 15 at opposite ends of the axial direction of the ceramic shell 10. The anode electrode 20 is connected to an external anode power supply, and the cathode electrode 30 is connected to an external cathode power supply. When both are energized, an electric arc is generated between the anode electrode 20 and the cathode electrode 30 because the first inner cavity 14 and the second inner cavity 15 are connected and have a preset distance. The electric arc instantly generates high temperatures, which can reach over 1000 degrees Celsius. The ceramic shell 10 is insulating, preventing leakage of current from the anode electrode 20 and cathode electrode 30 located between its inner wall 11 and outer wall 12. The ceramic shell 10 also has good thermal conductivity; the surface temperature of the ceramic shell 10 heated by the electric arc can reach over 1000 degrees Celsius, allowing the heat released by the electric arc generated by the anode electrode 20 and cathode electrode 30 to be conducted to the melting chamber 13 through the ceramic shell 10. An insulating layer can be wrapped around the outer wall 12 of the ceramic shell 10 to reduce heat loss through the outer wall 12. The ceramic shell 10 has sufficient hardness to prevent cracking and leakage during use. The object to be melted is placed in the melting chamber 13. Due to the thermal conductivity of the ceramic shell 10, the heat generated by the electric arc is conducted to the object to be melted through the inner wall 11, rapidly melting the object.
[0032] As an optional embodiment, see Figures 1-3 The ceramic shell 10 is cylindrical, with a simple structure, and can be arranged around the melting chamber 13 with the anode electrode 20 and the cathode electrode 30 to improve the heating speed. Of course, the ceramic shell 10 can also be prismatic.
[0033] As an optional embodiment, see Figure 2 as well as Figure 4 The anode electrode 20 is ring-shaped; the first inner cavity 14 is ring-shaped to match the anode electrode 20.
[0034] See Figure 3 as well as Figure 5 The cathode electrode 30 is conical at one end facing the anode electrode 20, and cylindrical at the other end; the second inner cavity 15 is cylindrical to match the cathode electrode 30.
[0035] In this embodiment, the anode electrode 20 is ring-shaped, which facilitates the simultaneous generation of multiple electric arcs with multiple cathode electrodes 30, thereby improving heating efficiency. The conical end of the cathode electrode 30 faces the anode electrode 20, and the tip discharge can stably generate an electric arc between the anode electrode 20 and the cathode electrode 30.
[0036] As an optional embodiment, see Figure 3 as well as Figure 5 Multiple cathode electrodes 30 are provided, forming a ring. Multiple second inner cavities 15 are also provided corresponding to the cathode electrodes 30, arranged sequentially along the circumference of the ceramic outer shell 10. The cathode electrodes 30 are arranged around the inner wall 11, allowing multiple electric arcs to be generated between them and the anode electrode 20. These arcs form a ring, ensuring uniform heating of the object to be melted in the melting chamber 13. Furthermore, the multiple arcs generated by the multiple cathode electrodes 30 can simultaneously release more heat, increasing the heating rate.
[0037] As an optional embodiment, see Figure 1 The outer wall 12 located between the first inner cavity 14 and the second inner cavity 15 protrudes toward the inner wall 11 to form an annular first limiting ring 16;
[0038] The inner wall 11 located between the first inner cavity 14 and the second inner cavity 15 protrudes towards the outer wall 12 to form a second limiting ring 17 in the shape of a ring; the two end faces of the second limiting ring 17 in the axial direction are respectively flush with the two end faces of the first limiting ring 16 in the axial direction.
[0039] One end of the anode electrode 20 facing the cathode electrode 30 abuts against one end of the first limiting ring 16 and the second limiting ring 17;
[0040] One end of the cathode electrode 30 facing the anode electrode 20 abuts against the other end of the first limiting ring 16 and the second limiting ring 17;
[0041] An arc forming space 18 is provided between the first limiting ring 16 and the second limiting ring 17.
[0042] In this embodiment, the first limiting ring 16 and the second limiting ring 17 define a preset distance between the anode electrode 20 and the cathode electrode 30. The arc forming space 18 connects the anode electrode 20 disposed in the first inner cavity 14 and the cathode electrode 30 disposed in the second inner cavity 15, so that an arc can be generated within the arc forming space 18.
[0043] As an optional embodiment, the ceramic shell 10 is an alumina ceramic shell. The alumina ceramic shell possesses properties such as insulation, thermal conductivity, high temperature resistance, extremely high hardness, and opacity. Therefore, since the anode electrode 20, cathode electrode 30, and the arc generated by both are all located inside the alumina ceramic shell, not only is the noise reduced, but the opacity of the alumina ceramic shell also prevents the strong light generated by the arc from escaping. Because the alumina ceramic shell possesses insulation and sufficient hardness, it can prevent cracking during use and thus avoid leakage, extending its service life. Due to the alumina ceramic shell's thermal conductivity, the heat generated by the arc can be conducted to the alumina ceramic shell, allowing the surface temperature of the alumina ceramic shell to reach high temperatures exceeding 1000 degrees Celsius. Thus, using an alumina ceramic shell effectively reduces the undesirable characteristics of the arc, such as noise, high brightness, high temperature, and poor conductivity, while efficiently utilizing its high-temperature performance.
[0044] As an optional embodiment, both the anode electrode 20 and the cathode electrode 30 are made of graphite. The anode electrode 20 and cathode electrode 30 made of graphite are not only low-cost but can also withstand temperatures up to 3000 degrees Celsius, preventing both electrodes from ceasing operation when the temperature reaches 1000 degrees Celsius.
[0045] In summary, the low-power electric arc high-temperature melting furnace of this invention can achieve arc heating, generating temperatures above 1000 degrees Celsius with rapid temperature release. Furthermore, the arc generation does not require a connecting medium; only the anode and cathode electrodes are needed to discharge and generate the arc, avoiding the impact on service life caused by damage to the connecting medium. The low-power electric arc high-temperature melting furnace includes a ceramic shell, an anode electrode, and a cathode electrode. The ceramic shell is insulating, preventing leakage from the anode and cathode electrodes located inside. The ceramic shell also has good thermal conductivity; the surface temperature of the ceramic shell heated by the electric arc can reach above 1000 degrees Celsius, allowing the heat released by the arc generated by the anode and cathode electrodes to be conducted to the melting chamber through the ceramic shell. The ceramic shell possesses sufficient hardness to prevent cracking and leakage during use. The ceramic shell includes an inner wall and an outer wall; a melting chamber is formed inside the inner wall, where the object is placed for heating and melting. Specifically, a first inner cavity adapted to the anode electrode is formed between the inner and outer walls of one axial end of the ceramic shell, and the anode electrode is securely installed in the first inner cavity; a second inner cavity adapted to the cathode electrode is formed between the inner and outer walls of the other axial end of the ceramic shell, and the cathode electrode is securely installed in the second inner cavity; the first inner cavity and the second inner cavity are connected, and there is a preset distance between the first anode electrode and the first cathode electrode, so that when the anode electrode and the cathode electrode are energized, an electric arc can be generated between the anode electrode and the cathode electrode. Therefore, this invention can achieve a high temperature of over 1000 degrees Celsius when using electric heating, and it is low in cost and has a long service life.
[0046] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.
Claims
1. A low power arc high temperature smelting furnace characterized by, The ceramic shell comprises an inner wall and an outer wall; an inner part of the inner wall is provided with a smelting cavity; An inner wall and an outer wall of an axial end of the ceramic shell form a first inner cavity matched with the anode electrode; the anode electrode is tightly installed in the first inner cavity; an inner wall and an outer wall of an axial other end of the ceramic shell form a second inner cavity matched with the cathode electrode; the cathode electrode is tightly installed in the second inner cavity; the first inner cavity and the second inner cavity are communicated, and the first anode electrode and the first cathode electrode have a preset interval.
2. The low-power arc high-temperature smelting furnace according to claim 1, characterized in that, The ceramic shell is in a cylindrical shape.
3. The low-power arc high-temperature smelting furnace according to claim 1, characterized in that, The anode electrode is in a ring shape; the first inner cavity is in a ring shape matched with the anode electrode; The cathode electrode is in a conical shape at one end thereof facing the anode electrode, and is in a cylindrical shape at the other end thereof; the second inner cavity is in a cylindrical shape matched with the cathode electrode.
4. The low-power arc high-temperature smelting furnace according to claim 3, characterized in that The cathode electrode is provided with a plurality of cathode electrodes, and the plurality of cathode electrodes form a ring shape; the second inner cavity is provided with a plurality of second inner cavities corresponding to the cathode electrodes, and the plurality of second inner cavities are sequentially arranged along a circumferential direction of the ceramic shell.
5. The low-power arc high-temperature smelting furnace according to claim 1, characterized in that, The outer wall between the first inner cavity and the second inner cavity is protruded towards the inner wall to form a first limiting ring in a ring shape; The inner wall between the first inner cavity and the second inner cavity is protruded towards the outer wall to form a second limiting ring in a ring shape; two end faces of the second limiting ring in an axial direction are flush with two end faces of the first limiting ring in an axial direction respectively; The anode electrode is abutted to one end of the first limiting ring and the second limiting ring at one end thereof facing the cathode electrode; The cathode electrode is abutted to the other end of the first limiting ring and the second limiting ring at one end thereof facing the anode electrode; The first limiting ring and the second limiting ring have an arc forming space therebetween.
6. The low-power arc high-temperature smelting furnace of claim 1, wherein, The ceramic shell is an alumina ceramic shell.
7. The low-power arc plasma furnace of claim 1, wherein, The anode electrode is made of a graphite material; The cathode electrode is made of a graphite material.