High-capacity medium-frequency electric furnace heat exchange system

Abstract

The utility model relates to the technical field of medium-frequency electric furnaces, in particular to a high-capacity medium-frequency electric furnace heat exchange system. Which comprises a main supporting frame and is characterized in that the main supporting frame is formed by combining a top upper knotting material plate, a bottom insulating plate, a front insulating plate, a rear insulating plate, a left side plate and a right side plate, a hearth is arranged in the main supporting frame, a heat exchange assembly is arranged on the outer wall of the hearth, and mounting supports are arranged on the two sides of the main supporting frame; the installation support is formed by combining a stand column, a rib plate, a maintenance plate and a cover plate, a U-shaped groove is formed in the cover plate, the comprehensive performance of the system is improved through innovative design, a high-temperature-resistant ceramic insulation plate forms a closed barrier, and electromagnetic leakage and heat radiation are effectively isolated; the multi-layer copper induction coil is matched with the double-area cooling pipeline and the metal supporting frame, so that efficient and uniform heat dissipation is realized; the hydraulic system adopts multi-stage transmission and U-shaped groove guiding, and it is ensured that the furnace body tilts stably and accurately.

Description

Technical Field

[0001] This utility model relates to the field of medium-frequency electric furnace technology, and in particular to a heat exchange system for a large-capacity medium-frequency electric furnace. Background Technology

[0002] In modern metallurgy, casting, and metal smelting industries, medium-frequency induction furnaces are widely used due to their high heating efficiency and precise temperature control. However, with the increasing demand for large-capacity smelting, traditional medium-frequency induction furnaces face challenges in terms of heat exchange efficiency, structural stability, and insulation protection. In existing technologies, the furnace body insulation layer is susceptible to high-temperature oxidation and failure, uneven heat dissipation in the cooling system leads to a shortened coil life, and uneven force on the hydraulic tilting mechanism affects casting accuracy.

[0003] Chinese patent discloses a medium-frequency electric furnace (publication number: CN 210892675 U) comprising: a frame, a furnace body mounted on the frame, a side wall of the furnace body rotatably connected to the frame and equipped with a drive device, a tong pot mounted inside the furnace body, a furnace opening communicating with the tong pot, an induction coil surrounding the tong pot, an outlet connected to the tong pot on the furnace opening, an elastic element on the bottom wall of the tong pot, and an impurity filter screen on the top of the elastic element. However, this medium-frequency electric furnace has defects such as insufficient insulation performance, low heat exchange efficiency, and poor mechanical structure stability, making it difficult to meet the long-term reliable operation requirements of large-capacity smelting. Therefore, a large-capacity medium-frequency electric furnace heat exchange system is needed. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of traditional medium-frequency electric furnaces in the prior art, such as insufficient insulation performance, low heat exchange efficiency, and poor mechanical structure stability, which make it difficult to meet the long-term reliable operation requirements of large-capacity smelting. Therefore, this invention proposes a heat exchange system for a large-capacity medium-frequency electric furnace.

[0005] The technical solution adopted by this utility model to solve its technical problem is as follows: A large-capacity medium-frequency electric furnace heat exchange system of this utility model includes a main support frame, characterized in that: the main support frame is composed of a top bridging plate, a bottom insulating plate, front and rear insulating plates, a left side plate and a right side plate; a furnace chamber is provided inside the main support frame; a heat exchange component is provided on the outer wall of the furnace chamber; mounting brackets are provided on both sides of the main support frame; the number of mounting brackets is two sets and they are correspondingly arranged; the mounting bracket is composed of a column, a stiffening plate, a maintenance plate and a cover plate; a U-shaped groove is provided on the cover plate; a hydraulic component is provided in the U-shaped groove; a fixed insulating rod is provided at the bottom of the main support frame; a base plate is provided at the bottom of the fixed insulating rod; and the base plate is associated with the mounting bracket. Fully enclosed insulation protection: The multi-layer insulation board combination structure effectively blocks electromagnetic leakage and prevents thermal radiation damage to external components from high temperatures; Modular quick maintenance: The detachable mounting bracket and inspection plate design facilitates the maintenance of the hydraulic system and the internal maintenance of the furnace body; Stable load-bearing and insulation isolation: The linkage design between the fixed insulation rod and the bottom plate ensures the load-bearing stability of the furnace body and achieves electrical insulation isolation.

[0006] Preferably, the hydraulic assembly includes a hydraulic cylinder, with a hydraulic rod at one top end of the hydraulic cylinder. A first drive shaft is connected to the top end of the hydraulic rod. A connecting plate is located at one end of the first drive shaft, and a second drive shaft is located at the other end of the connecting plate. A vertical bearing seat is located at one end of the second drive shaft, and the bottom of the vertical bearing seat is connected to a column. The segmented drive shaft design disperses local stress, avoiding the risk of deformation caused by single-point force. The rigid connection between the vertical bearing seat and the column ensures smooth and non-deviation-free tilting of the furnace body.

[0007] Preferably, the top bridging material has a circular opening at its center, which is concentric and coaxial with the furnace chamber. A nozzle is located on one side of the circular opening. The concentric circular opening ensures turbulent flow of the molten metal, and the nozzle structure enables precise control of the pouring direction. The circular opening also evenly distributes the thermal stress at the top of the furnace chamber, preventing sharp corner cracking.

[0008] Preferably, the heat exchange assembly includes a medium-frequency induction coil, which is made of multiple layers of tightly wound copper coils. A metal support frame surrounds and encloses the medium-frequency induction coil. The medium-frequency induction coil has multiple holes and connectors. The multiple layers of copper coils enhance the magnetic field concentration, the metal frame suppresses thermal deformation of the coil, the hole structure promotes air convection inside the coil, and the connectors enable rapid heat conduction.

[0009] Preferably, the intermediate frequency induction coil is provided with multiple cooling pipes at both the upper and lower parts, and the cooling pipes are in contact with the intermediate frequency induction coil. Synchronous cooling from top to bottom eliminates axial temperature differences in the coil, preventing localized overheating and failure; the external contact design of the pipes does not damage the coil insulation layer, and maintenance does not require disassembly of the coil.

[0010] Preferably, the top bonding plate, bottom insulating plate, and front and rear insulating plates are all made of high-temperature resistant insulating ceramic material with a temperature resistance rating of not less than 1500℃ and an anti-oxidation coating on the surface. The ceramic substrate resists molten metal splashes, and the coating delays high-temperature oxidation of the material; the multi-layer insulation structure ensures that the overall insulation performance is maintained even if a single layer is damaged.

[0011] The advantages of this utility model are:

[0012] This application achieves comprehensive performance enhancement through a multi-layered insulating frame, high-efficiency heat exchange components, and optimized mechanical structure design. Firstly, the top, bottom, and front / rear insulating plates, made of high-temperature resistant ceramic material and coated with an anti-oxidation layer, form a closed insulating barrier, effectively isolating electromagnetic leakage and the heat radiation from molten metal, and significantly extending the equipment's service life. Secondly, the intelligent heat exchange system, employing multi-layered copper induction coils and upper / lower dual-zone cooling pipes, enhances mechanical strength through a metal support frame while utilizing a perforated design to promote air convection, achieving uniform heat dissipation and a significant improvement in heat exchange efficiency. This design avoids localized overheating. Furthermore, the hydraulic system, through the linkage of multi-stage drive shafts and vertical bearing seats with a U-shaped groove guide design, ensures the smoothness of the furnace tilting process and precise control of the pouring angle. In addition, the integrated maintenance plate and detachable cover plate mounting bracket design, combined with the linkage structure of the fixed insulating rod and the base plate, not only ensures load-bearing stability but also simplifies the maintenance of the insulation structure, greatly improving the maintainability of the equipment. Finally, the synergistic effect of the concentric circular opening at the top of the furnace and the side nozzle structure optimizes the flow path of the molten metal, significantly reducing turbulent splashing, thereby improving pouring quality and production efficiency. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This utility model Figure 1 Enlarged view of I in the middle.

[0016] Figure 3 This is a schematic diagram of the internal structure of this utility model.

[0017] Figure 4This is a schematic diagram of the right-side structure of this utility model.

[0018] Figure 5 This is a schematic diagram of the structure of the medium-frequency induction coil of this utility model.

[0019] In the diagram: 1. Furnace nozzle; 2. Circular opening; 3. Main support frame; 4. Upper bridging plate; 5. Right side plate; 6. Front and rear insulation plates; 7. Base plate; 8. Fixed insulation rod; 9. Cover plate; 10. Inspection plate; 11. Rib plate; 12. Left side plate; 13. Mounting bracket; 14. Column; 15. Connecting plate; 16. Second drive shaft; 17. Vertical bearing seat; 18. First drive shaft; 19. Hydraulic rod; 20. Hydraulic cylinder; 21. Furnace chamber; 22. Medium frequency induction coil; 23. Hole; 24. Cooling pipe; 25. Metal support frame; 26. Connecting parts. Detailed Implementation

[0020] 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 of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Example

[0021] Please see Figure 1-5 As shown, a large-capacity medium-frequency electric furnace heat exchange system includes a main support frame 3. The main support frame 3 is characterized by being composed of a top bridging plate 4, a bottom insulating plate, front and rear insulating plates 6, a left side plate 12, and a right side plate 5. The main support frame 3 has an internal furnace chamber 21, and the outer wall of the furnace chamber 21 is provided with heat exchange components. Two sets of mounting brackets 13 are provided on both sides of the main support frame 3, and each mounting bracket 13 is composed of a column 14, a stiffening plate 11, a maintenance plate 10, and a cover plate 9. A U-shaped groove is provided on the cover plate 9, and a hydraulic component is installed within the U-shaped groove. A fixed insulating rod 8 is provided at the bottom of the main support frame 3, and a base plate 7 is provided at the bottom of the fixed insulating rod 8. The base plate 7 is associated with the mounting bracket 13. Fully enclosed insulation protection: The multi-layer insulation board combination structure effectively blocks electromagnetic leakage and prevents thermal radiation damage to external components from high temperatures; Modular quick maintenance: The design of detachable mounting brackets 13 and inspection plates 10 facilitates the maintenance of the hydraulic system and the internal maintenance of the furnace body; Stable load-bearing and insulation isolation: The linkage design of fixed insulation rods 8 and bottom plate 7 ensures the load-bearing stability of the furnace body and achieves electrical insulation isolation.

[0022] In this embodiment, the hydraulic assembly includes a hydraulic cylinder 20. A hydraulic rod 19 is located at one top end of the hydraulic cylinder 20. A first drive shaft 18 is connected to the top end of the hydraulic rod 19. A connecting plate 15 is located at one end of the first drive shaft 18, and a second drive shaft 16 is located at the other end of the connecting plate 15. A vertical bearing seat 17 is located at one end of the second drive shaft 16, and the bottom of the vertical bearing seat 17 is associated with a column 14. The segmented drive shaft design disperses local stress, avoiding the risk of deformation caused by single-point force. The rigid connection between the vertical bearing seat 17 and the column 14 ensures smooth and non-displaced tilting of the furnace body.

[0023] In this embodiment, a circular opening 2 is provided at the center of the top bridging material. The circular opening 2 is concentrically and coaxially arranged with the furnace chamber 21, and a nozzle 1 is provided on one side of the circular opening 2. The concentric circular opening ensures that the molten liquid flows without turbulence, and the structure of the nozzle 1 enables precise control of the pouring direction; the circular opening 2 evenly disperses the thermal stress at the top of the furnace chamber 21, avoiding sharp corner cracking.

[0024] In this embodiment, the heat exchange assembly includes a medium-frequency induction coil 22, which is made of multiple layers of tightly wound copper coils. A metal support frame 25 is provided around the medium-frequency induction coil 22 and surrounds it. The medium-frequency induction coil 22 has multiple holes 23 and connectors 26. The multiple layers of copper coils enhance the magnetic field concentration, the metal frame suppresses thermal deformation of the coil, the holes 23 promote air convection inside the coil, and the connectors 26 enable rapid heat conduction.

[0025] In this embodiment, multiple cooling pipes 24 are provided at both the upper and lower parts of the intermediate frequency induction coil 22, and the cooling pipes 24 are in contact with the intermediate frequency induction coil 22. Simultaneous cooling from top to bottom eliminates axial temperature differences in the coil, preventing localized overheating and failure; the external contact design of the pipes does not damage the coil insulation layer, and maintenance does not require disassembling the coil.

[0026] In this embodiment, the top knotting plate 4, the bottom insulating plate, and the front and rear insulating plates 6 are all made of high-temperature resistant insulating ceramic material, with a temperature resistance rating of not less than 1500℃ and an anti-oxidation coating on the surface. The ceramic substrate resists molten metal splashes, and the coating delays the high-temperature oxidation of the material; the multi-layer insulation structure ensures that the overall insulation performance can be maintained even if a single layer is damaged.

[0027] The implementation principle of this embodiment is as follows:

[0028] 1. Heating and heat exchange processes

[0029] When the medium-frequency induction furnace starts, the medium-frequency induction coil 22 (made of multiple layers of tightly wound high-purity copper coils) is energized, generating a high-frequency alternating magnetic field that rapidly heats and melts the metal material inside the furnace chamber 21. Due to the large amount of heat generated during high-power operation, the heat exchange components immediately activate to dissipate heat: the metal support frame 25 surrounding the copper coil not only enhances structural strength but also helps to conduct heat evenly; the holes 23 and connectors 26 on the coil surface form airflow channels, promoting natural convection heat dissipation; simultaneously, cooling pipes 24 distributed at the upper and lower ends of the induction coil carry circulating cooling water, directly absorbing the heat generated by the coil.

[0030] 2. Furnace body structure and insulation protection

[0031] The entire heating system is enclosed within a main support frame 3, consisting of a top-mounted baffle plate 4 (with a central circular opening 2 and side nozzles 1), a bottom insulating plate, front and rear insulating plates 6, and left and right side plates 5. These insulating plates are all made of ceramic material resistant to temperatures up to 1500℃, coated with a special anti-oxidation coating to isolate electromagnetic leakage and prevent damage from molten metal splashes. The bottom of the furnace body is connected to the base plate 7 via fixed insulating rods 8, ensuring both load-bearing stability and electrical insulation.

[0032] 3. Hydraulic tilting and pouring control

[0033] When the metal is fully melted and needs to be poured, the hydraulic cylinder 20 pushes the hydraulic rod 19 to extend. Through the linkage mechanism of the first drive shaft 18-connecting plate 15-second drive shaft 16, the power is transmitted to the vertical bearing seat 17, causing the entire furnace body to tilt smoothly along the column 14. The U-shaped groove precisely limits the stroke of the hydraulic rod 19. Together with the mounting bracket 13 system consisting of the column 14, stiffening plate 11, inspection plate 10 and cover plate 9, it ensures that the furnace body can still achieve a tilting accuracy within 0.5° under maximum load. During daily operation, the detachable inspection plate 10 and cover plate 9 on the mounting bracket 13 facilitate quick inspection of the hydraulic system and coil status. If in-depth maintenance is required, the connecting plate 15 can be separated to disconnect the hydraulic transmission connection.

[0034] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model.

Claims

1. A large-capacity medium-frequency electric furnace heat exchange system, comprising a main support frame (3), characterized in that... The main support frame (3) is composed of a top top bridging plate (4), a bottom insulating plate, front and rear insulating plates (6), a left side plate (12), and a right side plate (5). The main support frame (3) has a furnace chamber (21) inside. The outer wall of the furnace chamber (21) is provided with a heat exchange component. The main support frame (3) has mounting brackets (13) on both sides. There are two sets of mounting brackets (13) and they are set accordingly. The mounting brackets (13) are composed of columns (14), stiffening plates (11), inspection plates (10), and cover plates (9). The cover plate (9) has a U-shaped groove. The U-shaped groove is provided with a hydraulic component. The bottom of the main support frame (3) is provided with a fixed insulating rod (8). The bottom of the fixed insulating rod (8) is provided with a base plate (7). The base plate (7) is associated with the mounting brackets (13).

2. The large-capacity medium-frequency electric furnace heat exchange system according to claim 1, characterized in that: The hydraulic assembly includes a hydraulic cylinder (20), with a hydraulic rod (19) at one top end of the hydraulic cylinder (20). A first drive shaft (18) is connected to one top end of the hydraulic rod (19). A connecting plate (15) is provided at one end of the first drive shaft (18), and a second drive shaft (16) is provided at the other end of the connecting plate (15). A vertical bearing seat (17) is provided at one end of the second drive shaft (16), and the bottom of the vertical bearing seat (17) is associated with a column (14).

3. The large-capacity medium-frequency electric furnace heat exchange system according to claim 1, characterized in that: The top bridging material has a circular opening (2) at its center. The circular opening (2) is coaxially arranged with the furnace chamber (21). A nozzle (1) is provided on one side of the circular opening (2).

4. The large-capacity medium-frequency electric furnace heat exchange system according to claim 1, characterized in that: The heat exchange assembly includes an intermediate frequency induction coil (22), which is made of multiple layers of tightly wound copper coils. The intermediate frequency induction coil (22) is surrounded by a metal support frame (25) and is wrapped with the intermediate frequency induction coil (22). The intermediate frequency induction coil (22) is provided with multiple holes (23) and connectors (26).

5. A large-capacity medium-frequency electric furnace heat exchange system according to claim 4, characterized in that: The intermediate frequency induction coil (22) is provided with multiple cooling pipes (24) at both the upper and lower parts, and the cooling pipes (24) are in contact with the intermediate frequency induction coil (22).

6. The large-capacity medium-frequency electric furnace heat exchange system according to claim 1, characterized in that: The top knotting plate (4), bottom insulation plate and front and rear insulation plates (6) are all made of high temperature resistant insulating ceramic material, with a temperature resistance of not less than 1500℃ and an anti-oxidation coating on the surface.

Images