Large-sized all-closed nickel-iron electric furnace electrode column insulation device

Abstract

The utility model provides a large -scale full -enclosed nickel -iron electric furnace electrode post insulation device, including first insulation structure, second insulation structure, third insulation structure, fourth insulation structure, fifth insulation structure, sixth insulation structure and seventh insulation structure, first insulation structure sets up in the connecting place of copper bus suspension device and suspension sleeve, second insulation structure sets up in the connecting place of copper tile suspension and suspension sleeve, third insulation structure sets up in the connecting place of pressure ring suspension and suspension sleeve, fourth insulation structure sets up in the connecting place of pressure ring and bottom ring, fifth insulation structure sets up in the connecting place of protection cover and suspension sleeve, sixth insulation structure sets up in the connecting place of protection cover and bottom ring, seventh insulation structure sets up in the connecting place of suspension sleeve and pipeline, suspender, the utility model discloses can improve the insulation performance between each core spare part, improves system structure overall stability bad and short service life etc. Influence safety and production problem.

Description

Technical Field

[0001] This utility model relates to the field of ferroalloy smelting technology, and in particular to an electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace. Background Technology

[0002] In the electric furnace production process, the insulation between the various internal components of the electric furnace is an extremely important design aspect, which directly affects whether the electric furnace can produce stably. As the core component of the electric furnace equipment, the insulation performance of the electrode column directly affects the production of the electric furnace, thereby affecting the final output and economic benefits.

[0003] The difference between nickel-iron electric furnaces and other types of electric furnaces lies in their higher operating voltage, which is several times higher than that of other types of electric furnaces. Due to the characteristics of high-voltage operation, higher requirements are placed on the insulation form and insulation performance between various components of the electric furnace.

[0004] In recent years, with the continuous advancement of electric furnace production technology and design capabilities, the capacity of nickel-iron electric furnaces has also been continuously increasing, gradually upgrading from the original 48MVA and 60MVA to 75MVA. This increase in furnace capacity brings with it higher voltage and current, as well as more complex operating conditions. The insulation materials and methods originally suitable for small and medium-sized electric furnaces can no longer meet the operating conditions of current capacity electric furnaces.

[0005] In view of the above problems, there is an urgent need to develop a new type of electrode post insulation device to address the challenges of using it under the complex operating conditions of large nickel-iron electric furnaces. Utility Model Content

[0006] To address the aforementioned technical problems, a large-scale, fully enclosed electrode column insulation device for nickel-iron electric furnaces is provided. The technical means employed in this invention are as follows:

[0007] An insulation device for electrode columns of a large-scale fully enclosed nickel-iron electric furnace includes: a first insulation structure, a second insulation structure, a third insulation structure, a fourth insulation structure, a fifth insulation structure, a sixth insulation structure, and a seventh insulation structure. The first insulation structure is located at the connection between the copper busbar suspension device and the suspension sleeve. The second insulation structure is located at the connection between the copper tile suspension device and the suspension sleeve. The third insulation structure is located at the connection between the pressure ring suspension device and the suspension sleeve. The fourth insulation structure is located at the connection between the pressure ring and the bottom ring. The fifth insulation structure is located at the connection between the protective sleeve and the suspension sleeve. The sixth insulation structure is located at the connection between the protective sleeve and the bottom ring. The seventh insulation structure is located at the connection between the suspension sleeve and the pipeline and the suspension rod.

[0008] Furthermore, the first insulation structure includes an insulating sleeve I, an insulating plate II, and an insulating gasket I. The copper busbar suspension device is connected to the suspension sleeve via a flange. The insulating plate II is disposed between the first flange of the copper busbar suspension device and the second flange of the suspension sleeve. The first flange and the second flange are connected by a first bolt. The insulating sleeve I is fitted over the outer wall of the first bolt and penetrates through the first flange and the second flange. The insulating gasket I is fitted over the outside of the insulating sleeve I. At least two insulating gaskets I are provided, respectively placed between the first flange and the first bolt and between the second flange and the first bolt.

[0009] Furthermore, the second insulation structure includes an insulating sleeve II and two insulating gaskets II. The copper tile hanger and the hanger base of the hanger sleeve are connected by a first screw. The insulating sleeve II is fitted between the outer wall of the first screw and the inner wall of the hanger base. Nuts are connected to both sides of the first screw. A steel gasket is provided between each nut, the hanger base, and the insulating sleeve II. The two insulating gaskets II are respectively fitted on the outer ends of the insulating sleeve II. Each insulating gasket II is placed between the hanger base and the steel gasket.

[0010] Furthermore, the third insulation structure includes an insulating sleeve II and two insulating gaskets II. The pressure ring hanger and the hanger seat of the hanger sleeve are connected by a second screw. The insulating sleeve II is fitted between the outer wall of the second screw and the inner wall of the hanger seat. Nuts are connected to both sides of the second screw. A steel gasket is provided between each nut, the hanger seat, and the insulating sleeve II. The two insulating gaskets II are respectively fitted on the outer ends of the insulating sleeve II. Each insulating gasket II is placed between the hanger seat and the steel gasket.

[0011] Furthermore, the fourth insulating structure includes an insulating sleeve I, an insulating plate II, and an insulating gasket I. The hanger of the bottom ring is flangedly connected to the pressure ring body. The insulating plate II is disposed between the third flange of the hanger and the fourth flange of the pressure ring body. The third flange and the fourth flange are connected by a second bolt. The insulating sleeve I is fitted over the outer wall of the second bolt and penetrates through the third flange and the fourth flange. The insulating gasket I is fitted over the insulating sleeve I. At least two insulating gaskets I are provided, one placed between the third flange and the second bolt, and the other between the fourth flange and the second bolt.

[0012] Furthermore, an insulating structure composed of irregularly shaped high-alumina bricks and refractory ceramic fiber felt is provided between the bottom of the pressure ring and the upper surface of the bottom ring.

[0013] Furthermore, the fifth insulation structure includes insulation structure one and insulation structure two. The hanging sleeve is connected to a cover plate via a fifth screw and a nut. A positioning block is connected to the protective sleeve. The positioning block and the cover plate are connected via a fourth screw and a nut.

[0014] The insulation structure includes an insulating sleeve I, an insulating plate II, and an insulating gasket I. The insulating plate II is disposed between the hanging sleeve and the cover plate. The insulating sleeve I is sleeved on the outside of the third screw. Nuts are connected to both sides of the third screw. The insulating gasket I is sleeved on the outside of the insulating sleeve I on the side away from the hanging sleeve, and is disposed between the cover plate and the nut on that side.

[0015] The second insulation structure includes an insulating sleeve I and an insulating gasket I. The insulating sleeve I is fitted over the outside of the fourth screw. Nuts are connected to both sides of the fourth screw. The insulating gasket I is fitted over both ends of the outside of the insulating sleeve I. The insulating gasket I on each side is placed between the cover plate and the nut.

[0016] Furthermore, a polytetrafluoroethylene (PTFE) insulating plate is provided between the insulating plate II and the hanging sleeve, and the fifth bolt passes through the PTFE insulating plate. The PTFE insulating plate is L-shaped and is located between the hanging sleeve and the protective sleeve.

[0017] Furthermore, the sixth insulation structure includes a shaped alumina ceramic insulating ring and an insulating plate I connected between the protective sleeve and the bottom ring. The bottom ring has a groove structure, and the shaped alumina ceramic insulating ring is arranged in the groove structure of the bottom ring and located below the protective sleeve. The insulating plate I is located between the bottom claw hook of the protective sleeve and the bottom ring retaining ring.

[0018] Furthermore, the seventh insulation structure includes an insulating sleeve III, which is fitted onto the outer wall of the pipe passing through the hanging sleeve flange.

[0019] Compared with the prior art, the present invention has the following advantages:

[0020] 1. The large-scale fully enclosed nickel-iron electric furnace electrode column insulation device provided by this utility model adopts a flange plate insulation structure between the copper busbar device and the hanging sleeve, which has a larger insulation contact area, less insulation stress, and bolt fastening and isolation through insulation sleeve and insulation gasket. The insulation structure is stable and has a long service life.

[0021] 2. The large-scale fully enclosed nickel-iron electric furnace electrode column insulation device provided by this utility model uses a combination of insulated hanging and sleeve to insulate and isolate the copper tile and pressure ring. This design allows the insulation position to be adjusted from inside the electrode to outside, which can greatly save internal electrode space and avoid sparking caused by components being too close together due to the narrow internal space of the electrode. At the same time, the insulation position is far away from the high-temperature area of ​​the electric furnace, which can greatly increase the insulation life, reduce the maintenance rate, and indirectly increase production.

[0022] 3. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace provided by this utility model innovatively adopts a combination insulation structure of irregularly shaped high-alumina brick ring and refractory ceramic fiber felt between the pressure ring and the bottom ring. This structure can effectively compensate for the increase in pressure ring height caused by the increase in the height of the copper tiles in a large electric furnace through the thickness of the high-alumina brick, thereby reducing the overall weight of the electrode and achieving higher economic benefits. At the same time, this structure has higher strength, and the elasticity of the refractory ceramic fiber felt can effectively prevent the pressure ring and bottom ring from being crushed and damaged. In addition, the refractory ceramic fiber felt can effectively block the leakage of flue gas inside the furnace, resulting in better sealing performance.

[0023] 4. The large-scale fully enclosed nickel-iron electric furnace electrode column insulation device provided by this utility model adopts a novel fixing and insulation structure between the protective sleeve and the hanging sleeve. This structure connects the protective screen fixing block to the hanging sleeve flange through a pressure plate. The fixing block can be welded and installed on site. This structure has a high degree of freedom, a large adjustment space, and a good fixing effect, which can effectively prevent the protective screen from shaking with the movement of the electrode, causing the insulation structure of each part to be squeezed and resulting in insulation failure. At the same time, the multi-level insulation structure under the pressure plate effectively insulates the connection between each connecting part, forming multiple protections. Even if one layer of insulation fails, it will not cause a short circuit risk, greatly improving the insulation reliability.

[0024] 5. The large-scale fully enclosed nickel-iron electric furnace electrode column insulation device provided by this utility model features an innovative redesign of the structure between the protective sleeve and the bottom ring. It uniquely adopts a bottom ring groove structure and uses a shaped alumina ceramic insulating ring as the insulating medium between the two. This structure can effectively fix the shaped alumina ceramic insulating ring, reduce the damage to the insulating ring caused by movement. Even if it is damaged, the groove structure can prevent the alumina ceramic insulating ring from falling off and still maintain its insulation performance. At the same time, this structure can prevent the furnace charge and slag from eroding the insulation at this point, significantly improving the service life, reducing the maintenance rate of the electric furnace, improving operating efficiency, and indirectly increasing production benefits.

[0025] 6. The large-scale fully enclosed nickel-iron electric furnace electrode column insulation device provided by this utility model uses a newly designed insulating sleeve to fix and insulate the hanging sleeve from the pipeline and the hanging rod. This insulating sleeve consists of two half-tubes, which can be replaced at any time, facilitating installation and maintenance. The upper boss and lower barb ensure effective fixation and prevent movement, avoiding damage caused by impact or compression. Furthermore, all water pipes are fitted with a silicone rubber and fiberglass refractory sleeve structure, which, while providing fire resistance, effectively protects against sparking and water leakage caused by close proximity of the internal pipelines of the electrode to other components.

[0026] Based on the above reasons, this utility model can be widely promoted in the fields of metallurgy and other fields. Attached Figure Description

[0027] 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 some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is an elevation view of the electrode post of this utility model.

[0029] Figure 2 for Figure 1 Enlarged view at point I, showing the insulation between the copper busbar assembly and the hanging sleeve.

[0030] Figure 3 for Figure 1 Enlarged view at point II in the middle, showing the insulation between the copper tile and the hanging sleeve.

[0031] Figure 4 for Figure 1 Enlarged view of section III, showing the insulation between the pressure ring and the hanging sleeve.

[0032] Figure 5 for Figure 1 Enlarged view at point IV in the middle, showing the pressure ring and bottom ring being insulated.

[0033] Figure 6 for Figure 1 Enlarged view at point V, showing insulation between the protective sleeve and the hanging sleeve.

[0034] Figure 7 for Figure 1 Enlarged view at point VI, showing the insulation between the hanging sleeve and the pipeline and hanger.

[0035] Figure 8 for Figure 1 Enlarged view at point VII, showing insulation between the bottom ring and the protective sleeve.

[0036] Figure 9 for Figure 6 Model diagram of insulating bushing Ⅲ22.

[0037] In the diagram: 1. Hanging sleeve; 2. Copper busbar assembly; 3. Copper busbar hanging device; 4. Protective sleeve; 5. Copper tile; 6. Pressure ring; 7. Bottom ring; 8. Insulating plate I; 9. Irregularly shaped alumina ceramic insulating ring; 10. High alumina brick; 11. Refractory ceramic fiber felt; 12. Insulating sleeve I; 13. Insulating plate II; 14. Insulating gasket I; 15. Insulating sleeve II; 16. Insulating gasket II; 17. Copper tile hanger; 18. Pressure ring hanger; 19. Polytetrafluoroethylene insulating board; 20. Cover plate; 21. Positioning block; 22. Insulating sleeve III; 23. Silicone rubber glass fiber refractory sleeve. Detailed Implementation

[0038] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0039] This invention provides an insulation device for the electrode column of a large-scale, fully enclosed nickel-iron electric furnace, relating to the electrode system of a nickel-iron electric furnace. It improves the insulation performance between core components such as the copper tiles, bottom ring, and pressure ring within the electrode column, addressing issues affecting safety and production, such as poor overall system stability and short service life, thus ensuring stable equipment operation and efficient production. While ensuring insulation between the core components within the electrode column, this invention features individual structural designs for different operating conditions and installation requirements at different application locations, and selects suitable materials based on the usage environment to meet the requirements.

[0040] like Figure 1 As shown, the large-scale fully enclosed nickel-iron electric furnace electrode column insulation device of this utility model mainly includes a first insulation structure, a second insulation structure, a third insulation structure, a fourth insulation structure, a fifth insulation structure, a sixth insulation structure, and a seventh insulation structure. The electrode column mainly includes core components such as a hanging sleeve 1, a copper busbar device 2, a copper busbar hanging device 3, a protective sleeve 4, a copper tile 5, a pressure ring 6, a bottom ring 7, a copper tile hanger 17, and a pressure ring hanger 18. To prevent sparking between components that could damage the equipment, and to prevent electrical conduction between components that could lead to other furnace components and personnel injuries, reliable and stable insulation structures must be installed between each core component.

[0041] The first insulation structure is installed at the connection between the copper busbar suspension device 3 and the suspension sleeve 1; the second insulation structure is installed at the connection between the copper tile suspension 17 and the suspension sleeve 1; the third insulation structure is installed at the connection between the pressure ring suspension 18 and the suspension sleeve 1; the fourth insulation structure is installed at the connection between the pressure ring 6 and the bottom ring 7; the fifth insulation structure is installed at the connection between the protective sleeve 4 and the suspension sleeve 1; the sixth insulation structure is installed at the connection between the protective sleeve 4 and the bottom ring 7; and the seventh insulation structure is installed at the connection between the suspension sleeve 1 and the pipeline and the hanger.

[0042] The specific settings are as follows:

[0043] 1. Insulation between copper busbar assembly 2 and hanging sleeve 1: The first insulation structure includes insulating sleeve I12, insulating plate II13, and insulating gasket I14, such as... Figure 2As shown, the copper busbar device 2 is connected to the hanging sleeve 1 via the copper busbar suspension device 3. The copper busbar suspension device 3 and the hanging sleeve 1 are connected by a flange. The first flange of the copper busbar suspension device 3 and the second flange of the hanging sleeve 1 are insulated and isolated by an insulating plate II 13. The first flange and the second flange are connected by a first bolt. The bolt is insulated by an insulating sleeve I 12 and an insulating gasket I 14. The insulating sleeve I 12 is fitted on the outer wall of the first bolt and passes through the first flange and the second flange. The insulating gasket I 14 is fitted on the outside of the insulating sleeve I 12. There are two insulating gaskets I 14, which are placed between the first flange and the first bolt and between the second flange and the first bolt, respectively. The insulation space here is relatively sufficient, so the insulation design here is a flange plate type insulation, and the bolt fasteners are isolated by the insulating sleeve I12 and the insulating gasket I14. The insulation here is far away from the high temperature area. The insulation material here is 3240 epoxy phenolic laminated glass cloth board and 3641 epoxy laminated glass cloth tube. This material can withstand a temperature of 155℃ while ensuring insulation performance.

[0044] 2. Insulation between copper tile 5 and hanging sleeve 1: The second insulation structure includes insulating sleeve II15 and insulating gasket II16, such as... Figure 3 As shown, the copper tile 5 and the hanging sleeve 1 are connected by a copper tile hanger 17. Insulation is provided at the hanging seat of the hanging sleeve 1 (the hanging seat is welded to the hanging sleeve 1 and is integral with the hanging sleeve 1, used to connect the copper tile hanger 17), and is insulated by an insulating sleeve II 15 and an insulating gasket II 16. The copper tile hanger 17 and the hanging sleeve 1 are connected by a first screw. The insulating sleeve II 15 is fitted between the outer wall of the first screw and the inner wall of the hanging seat. Nuts are connected to both sides of the first screw. A steel gasket is placed between each nut and the hanging seat and the insulating sleeve II 15. Two insulating gaskets II 16 are respectively fitted on the outer ends of the insulating sleeve II 15, and each insulating gasket II 16 is placed between the hanging seat and the steel gasket. Because the copper tile 5 is located inside the electric furnace during production, where the production environment is at a high temperature, and because it is a conductive core component, its insulation stability and lifespan are particularly important. Therefore, this utility model innovatively combines insulation with hanging and places it outside the furnace. In the event of occasional flame ejection during the electric furnace production process, the temperature resistance requirements for this position are even higher. Therefore, fluorophlogopite is selected as the insulation material for this position. This material can withstand temperatures above 1000℃ while ensuring insulation, which can effectively prevent high-temperature failure caused by flame ejection.

[0045] 3. Insulation between pressure ring 6 and hanging sleeve 1: The third insulation structure includes insulating sleeve II 15 and insulating gasket II 16, such as... Figure 4As shown, the pressure ring 6 and the hanging sleeve 1 are connected by a pressure ring hanger 18. Insulation is provided at the hanging seat of the hanging sleeve 1 (the hanging seat is welded to the hanging sleeve 1 and is integral with the hanging sleeve 1, used to connect the pressure ring hanger 18), and is insulated by an insulating sleeve II 15 and an insulating gasket II 16. The pressure ring hanger 18 and the hanging seat of the hanging sleeve 1 are connected by a second screw. The insulating sleeve II 15 is fitted between the outer wall of the second screw and the inner wall of the hanging seat. Nuts are connected to both sides of the second screw. A steel gasket is placed between the nut on each side and the hanging seat and the insulating sleeve II 15. Two insulating gaskets II 16 are respectively fitted on the outer ends of the insulating sleeve II 15, and each insulating gasket II 16 is placed between the hanging seat and the steel gasket. Because it is located inside the furnace chamber during production, where the production environment is at a high temperature, and as a core component of the electric furnace, its insulation stability and lifespan are particularly important. Therefore, this utility model innovatively combines insulation with hanging and places it outside the furnace chamber. In the event of occasional flame ejection during the electric furnace production process, the temperature resistance requirements for this location are even higher. Therefore, fluorophlogopite is selected as the insulation material for this location. This material can withstand temperatures above 1000℃ while ensuring insulation performance, which can effectively prevent high-temperature failure caused by flame ejection.

[0046] 4. Insulation between pressure ring 6 and bottom ring 7: The fourth insulation structure includes insulating sleeve I12, insulating plate II13, and insulating gasket I14, such as... Figure 5As shown, the bottom ring 7 is mounted on the pressure ring 6 body via a hanger. The hanger and the pressure ring 6 body are connected by a flange. The flanges are insulated from each other by an insulating plate II 13. The bolt fastenings are insulated from each other by an insulating sleeve I 12 and an insulating gasket I 14. The insulating plate II 13 is positioned between the third flange of the hanger and the fourth flange of the pressure ring 6 body. The third and fourth flanges are connected by a second bolt. The insulating sleeve I 12 is fitted over the outer wall of the second bolt and penetrates both the third and fourth flanges. At least two insulating gaskets I 14 are fitted over the insulating sleeve I 12, one between the third flange and the second bolt, and the other between the fourth flange and the second bolt. This location is inside the electric furnace chamber, where the temperature is high. Therefore, fluorophlogopite is selected as the insulation material for this location. This material can withstand temperatures above 1000℃ while ensuring insulation performance, effectively preventing high-temperature failure. After the pressure ring 6 is suspended and connected to the bottom ring 7, the pressure ring 6 will rest on the upper surface of the bottom ring 7. Conventional electric furnaces use insulating plates for isolation, but this area is subject to certain pressure and is located inside the furnace chamber, where the working environment is extremely harsh, resulting in a short service life. This utility model innovatively adopts an insulating structure composed of irregularly shaped high-alumina bricks 10 and refractory ceramic fiber felt 11, which are placed between the bottom of the pressure ring 6 and the upper surface of the bottom ring 7. The thickness of the high-alumina bricks 10 can effectively compensate for the increase in the height of the pressure ring 6 caused by the increase in the height of the copper tiles 5 in large electric furnaces, thereby reducing the overall weight of the electrode and achieving higher economic benefits. The original design did not have the high-alumina bricks 10 of this utility model, but only a 20mm thick insulating plate. With the increase in furnace size, the copper tiles need to be raised, and the pressure ring 6 also needs to be raised accordingly (because the pressure ring 6 needs to rest on the bottom ring 7). This invention designs a high-alumina brick 10, which is relatively thick, thus replacing part of the height of the pressure ring 6. This allows for a lower height of the pressure ring 6, while the price of the high-alumina brick 10 is significantly lower than that of the stainless steel pressure ring 6. Furthermore, it improves hardness and insulation performance. The high-alumina brick 10 has a temperature resistance of 1700℃ and high hardness, effectively resisting harsh working conditions in this location. Simultaneously, the refractory ceramic fiber felt 11 effectively compensates for errors in the high-alumina brick 10 and installation, while also providing better sealing performance.

[0047] 5. Insulation between protective sleeve 4 and hanging sleeve 1: The fifth insulation structure includes insulation structure one and insulation structure two, such as... Figure 6As shown, the protective sleeve 4 and the hanging sleeve 1 are connected by a cover plate 20 and a positioning block 21. The cover plate 20 needs to be insulated from both the protective sleeve 4 and the hanging sleeve 1. Therefore, both ends are insulated with insulating sleeves I12 and insulating gaskets I14. The hanging sleeve 1 is connected to the cover plate 20 by two sets of third screws and nuts. The protective sleeve 4 is connected to the positioning block 21, and the positioning block 21 is connected to the cover plate 20 by a fourth screw and nut. Insulation structure one includes an insulating sleeve I12, an insulating plate II13, and an insulating gasket I14. The insulating plate II13 is positioned between the hanging sleeve 1 and the cover plate 20. The insulating sleeve I12 is fitted over the third screw, with nuts connected to both sides of the third screw. The insulating gasket I14 is fitted over the side of the insulating sleeve I12 away from the hanging sleeve 1 and positioned between the cover plate 20 and the nut on that side. Insulation structure two includes an insulating sleeve I12 and an insulating gasket I14. The insulating sleeve I12 is fitted over the fourth screw, with nuts connected to both sides of the fourth screw. The insulating gasket I14 is fitted over both ends of the insulating sleeve I12, with each insulating gasket I14 positioned between the cover plate 20 and the nut. This invention's insulation structure effectively fixes the protective screen and prevents its movement, while ensuring at least two layers of insulation protection between each component. Furthermore, the fasteners prevent the pressure plate from loosening, effectively avoiding insulation failure caused by compression. This location is situated above the electrode sealing ring. During the electric furnace production process, occasional flameouts occur, requiring higher temperature resistance at this position. Therefore, fluorophlogopite is selected as the insulation material for this location. Simultaneously, to prevent the protective sleeve 4 from shaking and crushing the insulation plate II 13 due to the vertical movement of the electrode, this invention employs a polytetrafluoroethylene (PTFE) insulation plate 19 as the base. This material has high hardness and can effectively prevent insulation breakage failure caused by compression, providing dual protection. The PTFE insulation plate 19 is positioned between the insulation plate II 13 and the hanging sleeve 1, with the fifth bolt penetrating through it. The PTFE insulation plate 19 is L-shaped and located between the hanging sleeve 1 and the protective sleeve 4.

[0048] 6. Insulation between the protective sleeve 4 and the bottom ring 7: The sixth insulation structure includes a shaped alumina ceramic insulating ring 9 and an insulating plate I8 connected between the protective sleeve 4 and the bottom ring 7. The bottom ring 7 has a groove structure, and the shaped alumina ceramic insulating ring 9 is arranged in the groove structure of the bottom ring 7, located below the protective sleeve 4. The insulating plate I8 is located between the bottom claw hook of the protective sleeve 4 and the retaining ring of the bottom ring 7. In conventional small and medium-sized electric furnaces, this position is insulated using the insulating plate I8. The insulation at this position can be damaged and fail due to the shaking and squeezing of the protective screen. Moreover, this position is the direct fire-facing surface of the electric furnace, where the temperature inside the furnace reaches 1000℃ and is subject to the erosion of the furnace charge. The lifespan of conventional structures and insulation materials cannot meet the requirements of long-term use of the electric furnace. This utility model innovatively redesigns the structure at this position, uniquely adopting a bottom ring groove structure, combined with a shaped alumina ceramic insulating ring. This structure can effectively fix the shaped alumina ceramic insulating ring and prevent the furnace charge and slag from eroding the insulation at this position. The protective sleeve 4 is fixed to the inside of the groove baffle of the bottom ring 7 by claw hooks, which can effectively prevent the screen from shaking, and is insulated by using a 6mm insulating board I8.

[0049] 7. Insulation between the hanging sleeve 1 and the pipeline and hanger: such as Figure 7 As shown, both the pipes and the flanges where the hangers pass through the hanging sleeve 1 require insulating sleeves III 22 for insulation to ensure insulation between the components. The insulating sleeve III 22 is fitted over the outer wall of the pipe, and a silicone rubber fiberglass refractory sleeve 23 is installed below it, also fitted over the outer wall of the pipe. This utility model uses an innovatively designed insulating sleeve III 22 for hanging and pipe insulation, such as... Figure 9 As shown, the insulating sleeve Ⅲ22 consists of two half-tubes, which can be replaced at any time for easy installation and maintenance. The upper boss and lower barb ensure effective fixation and prevent movement, avoiding damage caused by impact or compression. All water pipes inside the electrode are fitted with a silicone rubber and glass fiber fire-resistant sleeve structure, which is fire-resistant and effectively protects against sparking and water leakage caused by close proximity of the internal pipes to other components.

[0050] The newly developed insulation solution, through careful design and reasonable material selection for the insulation structure of each component, can effectively reduce equipment damage and personnel casualties caused by insulation failure in electric furnaces, greatly extend the service life of electric furnaces, effectively control equipment maintenance rates, thereby improving production efficiency and significantly enhancing the competitive advantage of general contracting.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A large-scale fully-closed ferronickel electric furnace electrode column insulation device, characterized in that, include: The first insulation structure comprises a first insulation structure, a second insulation structure, a third insulation structure, a fourth insulation structure, a fifth insulation structure, a sixth insulation structure, and a seventh insulation structure. The first insulation structure is located at the connection between the copper busbar hanging device (3) and the hanging sleeve (1). The second insulation structure is located at the connection between the copper tile hanging device (17) and the hanging sleeve (1). The third insulation structure is located at the connection between the pressure ring hanging device (18) and the hanging sleeve (1). The fourth insulation structure is located at the connection between the pressure ring (6) and the bottom ring (7). The fifth insulation structure is located at the connection between the protective sleeve (4) and the hanging sleeve (1). The sixth insulation structure is located at the connection between the protective sleeve (4) and the bottom ring (7). The seventh insulation structure is located at the connection between the hanging sleeve (1) and the pipeline and the hanger.

2. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace according to claim 1, characterized in that, The first insulation structure includes an insulating sleeve I (12), an insulating plate II (13), and an insulating gasket I (14). The copper busbar hanging device (3) is connected to the hanging sleeve (1) through a flange. The insulating plate II (13) is placed between the first flange of the copper busbar hanging device (3) and the second flange of the hanging sleeve (1). The first flange and the second flange are connected by a first bolt. The insulating sleeve I (12) is fitted on the outer wall of the first bolt and passes through the first flange and the second flange. The insulating gasket I (14) is fitted on the outside of the insulating sleeve I (12). There are at least two insulating gaskets I (14), which are placed between the first flange and the first bolt and between the second flange and the first bolt, respectively.

3. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace according to claim 1, characterized in that, The second insulation structure includes an insulating sleeve II (15) and two insulating gaskets II (16). The copper tile hanger (17) and the hanger seat of the hanger sleeve (1) are connected by a first screw. The insulating sleeve II (15) is fitted between the outer wall of the first screw and the inner wall of the hanger seat. Nuts are connected to both sides of the first screw. A steel gasket is provided between the nut on each side and the hanger seat and the insulating sleeve II (15). The two insulating gaskets II (16) are respectively fitted on the outer ends of the insulating sleeve II (15). The insulating gaskets II (16) on each side are placed between the hanger seat and the steel gasket.

4. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace according to claim 1, characterized in that, The third insulation structure includes an insulating sleeve II (15) and two insulating gaskets II (16). The pressure ring hanger (18) is connected to the hanger seat of the hanger sleeve (1) by a second screw. The insulating sleeve II (15) is fitted between the outer wall of the second screw and the inner wall of the hanger seat. Nuts are connected to both sides of the second screw. A steel gasket is provided between the nut on each side and the hanger seat and the insulating sleeve II (15). The two insulating gaskets II (16) are respectively fitted on the outer ends of the insulating sleeve II (15). The insulating gaskets II (16) on each side are placed between the hanger seat and the steel gasket.

5. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace according to claim 1, characterized in that, The fourth insulation structure includes an insulating sleeve I (12), an insulating plate II (13), and an insulating gasket I (14). The hanging seat of the bottom ring (7) is flange-connected to the body of the pressure ring (6). The insulating plate II (13) is located between the third flange of the hanging seat and the fourth flange of the body of the pressure ring (6). The third flange and the fourth flange are connected by a second bolt. The insulating sleeve I (12) is fitted on the outer wall of the second bolt and penetrates the third flange and the fourth flange. The insulating gasket I (14) is fitted on the outside of the insulating sleeve I (12). There are at least two insulating gaskets I (14), which are respectively placed between the third flange and the second bolt and between the fourth flange and the second bolt.

6. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace according to claim 5, characterized in that, An insulating structure composed of irregularly shaped high-alumina bricks (10) and refractory ceramic fiber felt is also provided between the bottom of the pressure ring (6) and the upper surface of the bottom ring (7).

7. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace according to claim 1, characterized in that, The fifth insulation structure includes insulation structure one and insulation structure two. The hanging sleeve (1) is connected to a cover plate (20) by a third screw and nut. The protective sleeve (4) is connected to a positioning block (21). The positioning block (21) and the cover plate (20) are connected by a fourth screw and nut. The insulation structure includes an insulating sleeve I (12), an insulating plate II (13), and an insulating gasket I (14). The insulating plate II (13) is disposed between the hanging sleeve (1) and the cover plate (20). The insulating sleeve I (12) is sleeved on the outside of the third screw. Nuts are connected to both sides of the third screw. The insulating gasket I (14) is sleeved on the outside of the insulating sleeve I (12) on the side away from the hanging sleeve (1) and is disposed between the cover plate (20) and the nut on that side. The second insulating structure includes an insulating sleeve I (12) and an insulating gasket I (14). The insulating sleeve I (12) is fitted over the outside of the fourth screw. Nuts are connected to both sides of the fourth screw. The insulating gasket I (14) is fitted over both ends of the outside of the insulating sleeve I (12). The insulating gasket I (14) on each side is placed between the cover plate (20) and the nut.

8. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace according to claim 7, characterized in that, A polytetrafluoroethylene (PTFE) insulating plate (19) is provided between the insulating plate II (13) and the hanging sleeve (1), and the fifth bolt passes through the PTFE insulating plate (19). The PTFE insulating plate (19) is L-shaped and is located between the hanging sleeve (1) and the protective sleeve (4).

9. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace according to claim 1, characterized in that, The sixth insulating structure includes a shaped alumina ceramic insulating ring (9) and an insulating plate I (8) connected between the protective sleeve (4) and the bottom ring (7). The bottom ring (7) has a groove structure. The shaped alumina ceramic insulating ring (9) is installed between the groove structure of the bottom ring (7) and the protective sleeve (4). The insulating plate I (8) is located between the bottom claw hook of the protective sleeve (4) and the retaining ring of the bottom ring (7).

10. The electrode column insulation device for a large-scale fully enclosed nickel-iron electric furnace according to claim 1, characterized in that, The seventh insulation structure includes an insulating sleeve III (22), which is fitted onto the outer wall of the pipe passing through the flange of the hanging sleeve (1).

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