Connecting device of bottom electrode and short net and direct current submerged arc furnace
The connection device using frame components and elastic connecting components solves the problem of increased contact resistance between the bottom electrode and the short grid at high temperatures, achieving a stable electrical connection between the electrode and the short grid, reducing the risk of arc discharge, and improving equipment safety and power transmission efficiency.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NING XIA NING PING TAN SU YOU XIAN ZE REN GONG SI
- Filing Date
- 2025-05-15
- Publication Date
- 2026-05-15
AI Technical Summary
In the existing technology, the connection method between the bottom electrode and the short grid is prone to increase in contact resistance at high temperatures, which can lead to arc discharge and endanger equipment safety.
The connection device, which uses frame components and elastic connecting components, achieves an elastic connection between the bottom electrode and the short mesh through the cooperation of clamping and adjusting components. This adapts to electrode expansion and deformation and dynamically adjusts the clamping force to reduce contact resistance.
It effectively reduces the frequency of arc discharge, improves power transmission efficiency, and ensures equipment safety.
Smart Images
Figure CN224246716U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of DC submerged arc furnace technology, and in particular to a connection device between the bottom electrode and the short grid, and a DC submerged arc furnace. Background Technology
[0002] A DC submerged arc furnace is an industrial furnace that uses DC power as its energy input and achieves high-temperature smelting of ores through resistance heating. It is widely used in metallurgy, chemical engineering, and other fields. As a high-temperature smelting device, the submerged arc furnace introduces a strong current into the furnace through top and bottom electrodes to generate a large amount of Joule heat under the resistance of the furnace charge, meeting the requirements for melting and reduction reactions. As a crucial link connecting the power supply to the internal conductive system, the reliability of the connection between the bottom electrode and the short grid directly affects the power transmission efficiency and the safety of the submerged arc furnace operation.
[0003] Currently, the industry commonly uses bolt fastening to connect the bottom electrode and the short grid. Conductive bolts are used to fix the bottom electrode to the connecting plate of the short grid to achieve electrical connection between the bottom electrode and the short grid. However, during the operation of a DC submerged arc furnace, the bottom electrode is prone to expansion and deformation under high temperature. As a rigid connection method, bolt fastening makes it difficult for the conductive bolts to dynamically adjust the clamping force according to the expansion and deformation of the bottom electrode. This results in local gaps at the contact surface between the bottom electrode and the short grid, leading to increased contact resistance and potentially causing arc discharge. The high temperature generated by the arc can not only burn electrical components such as the short grid conductive plate and insulating parts, but in severe cases, it can even cause equipment failure or safety accidents. Utility Model Content
[0004] In view of this, it is necessary to provide a connection device between the bottom electrode and the short grid and a DC submerged arc furnace, which can dynamically adjust the clamping force as the bottom electrode expands and deforms, so as to reduce the increase in contact resistance between the bottom electrode and the short grid, thereby reducing the frequency of arc discharge.
[0005] In a first aspect, this utility model provides a connection device for a bottom electrode and a short mesh, including a frame member and at least four connecting members with the same structure. Each connecting member is uniformly arranged along the circumference of the frame member. Each connecting member includes a clamping component and an adjusting component. The clamping component is installed inside the frame member. One end of the clamping component is used to clamp the bottom electrode, and the other end is used to clamp the short mesh, so that the bottom electrode and the short mesh are electrically connected. The fixed end of the adjusting component is fixedly installed outside the frame member, and the telescopic end extends into the inside of the frame member and is elastically connected to the clamping component. The telescopic end is used to adjust the distance between the inner sides of the clamping components of each connecting member, or to adapt to the expansion and deformation of the bottom electrode through the elastic connection, so as to adjust the clamping force of the clamping component on the bottom electrode and the short mesh.
[0006] Preferably, the clamping assembly includes a first clamping member, a second clamping member, and at least one connecting member. The inner side of the first clamping member is used to clamp the bottom electrode, and the inner side of the second clamping member is used to clamp the short net. The two ends of each connecting member are fixedly connected to the first clamping member and the second clamping member, respectively, for electrically connecting the first clamping member and the second clamping member.
[0007] Preferably, each connector is made of a flexible conductive material so that the distance between the first clamping member and the second clamping member can be adapted to change.
[0008] Preferably, both the first clamping member and the second clamping member are provided with a liquid inlet and a liquid outlet. The liquid inlet is used to introduce coolant into the first clamping member or the second clamping member, and the liquid outlet is used to discharge the coolant from the first clamping member or the second clamping member, so as to cool the first clamping member and the second clamping member by circulating coolant.
[0009] Preferably, the adjustment assembly includes a telescopic member, a fixed plate, and at least two mounting members. The fixed end of the telescopic member is fixedly installed on the outer edge of the frame member, and the telescopic end of the telescopic member extends into the frame member and is fixedly connected to the fixed plate. Both sides of the fixed plate are fixedly connected to the side of at least one mounting member. The bottom surface of each mounting member is used to elastically connect with the top surface of the first clamping member or the second clamping member.
[0010] Preferably, each mounting component has at least one spring assembly on its bottom surface. Each spring assembly includes a first fixing component, a second fixing component, a telescopic rod, and a spring component. The top surface of the first fixing component is fixedly connected to the bottom surface of the mounting component. The bottom surface is provided with a telescopic cylinder. One end of the telescopic rod is slidably connected to the telescopic cylinder, and the other end is fixedly connected to the top surface of the second fixing component. The distance between the first fixing component and the second fixing component can be adjusted by moving the telescopic rod inside the telescopic cylinder. The bottom surface of the second fixing component is rotatably connected to the top surface of each first clamping component or each second clamping component. The spring component is sleeved on the telescopic rod, and both ends are fixedly connected to the bottom surface of the first fixing component and the top surface of the second fixing component, respectively, so that the telescopic rod extends out of the telescopic cylinder under the action of the spring component.
[0011] Preferably, the bottom surface of the second fixing member is provided with a connecting hole, and the top surfaces of the first clamping member and the second clamping member are each provided with at least one connecting group. The number of connecting groups is the same as the number of spring groups, and they are evenly arranged on the top surface of the first clamping member or the second clamping member. The connecting group includes two connecting plates and a connecting rod. The two connecting plates are symmetrically arranged, and the two ends of the connecting rod are fixedly connected to the two connecting plates respectively. The connecting rod is also rotatably connected to the connecting hole.
[0012] Secondly, this utility model provides a DC submerged arc furnace, including a furnace body, N bottom electrodes, N short grids, and N connection devices for the bottom electrodes and short grids as described in the first aspect. Each bottom electrode is uniformly installed on the bottom of the furnace body, and each short grid is positioned opposite a bottom electrode. The connection devices for the bottom electrodes and short grids are uniformly installed on the outside of the furnace body, and each connection device for the bottom electrodes and short grids is positioned opposite a bottom electrode for electrically connecting the bottom electrodes and short grids; wherein, N≥1.
[0013] The aforementioned connection device between the bottom electrode and the short mesh includes a frame member and at least four identical connecting members. Each connecting member is evenly arranged along the circumference of the frame member. Each connecting member includes a clamping assembly and an adjusting assembly. The clamping assembly is installed inside the frame member, with one end clamping the bottom electrode and the other end clamping the short mesh to electrically connect the bottom electrode and the short mesh. The adjusting assembly has a fixed end fixedly installed on the outside of the frame member and a telescopic end extending into the inside of the frame member and elastically connected to the clamping assembly. This telescopic end allows adjustment of the distance between the inner sides of the clamping assemblies of each connecting member, or allows the elastic connection to accommodate the expansion of the bottom electrode. The clamping force of the clamping assembly on the bottom electrode and the short mesh is adjusted by the adjustment components of each connecting member. In this way, the clamping assembly is adjusted so that the inner side of the clamping assembly can tightly clamp the bottom electrode and the short mesh, so as to electrically connect the bottom electrode and the short mesh. When the bottom electrode of the electric arc furnace expands and deforms under the action of high temperature, since the clamping assembly and the adjustment assembly are elastically connected, the clamping assembly moves towards the adjustment assembly under the push of the outer surface of the bottom electrode, increasing the distance between the inner sides of each clamping assembly. This makes the clamping force of the clamping assembly on the bottom electrode change with the change of the shape of the bottom electrode, thereby reducing the increase in contact resistance between the bottom electrode and the short mesh, and thus reducing the frequency of arc discharge. Attached Figure Description
[0014] Figure 1 This is a perspective view of the connection device between the bottom electrode and the short mesh in this application.
[0015] Figure 2 This is a perspective view of the clamping component of this application.
[0016] Figure 3 This is a perspective view of the adjustment components of this application.
[0017] Figure 4 This is a side view of the spring assembly of this application.
[0018] Figure 5 This is a perspective view of the DC submerged arc furnace of this application.
[0019] In the figure: bottom electrode and short mesh connection device 10, frame component 20, connecting component 30, clamping assembly 31, first clamping component 311, second clamping component 312, connecting component 313, liquid inlet 314, liquid outlet 315, connecting group 316, connecting plate 3161, connecting rod 3162, adjusting assembly 32, telescopic component 321, fixing plate 322, mounting component 323, spring group 324, first fixing component 3241, second fixing component 3242, telescopic rod 3243, spring component 3244, telescopic cylinder 3245, connecting hole 3246, DC electric arc furnace 40, electric arc furnace body 41, bottom electrode 42, short mesh 43. Detailed Implementation
[0020] The technical solutions and effects of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.
[0021] Please refer to Figures 1 to 2 In one aspect, the present invention provides a connection device 10 for a bottom electrode and a short mesh, comprising a frame member 20 and at least four identical connecting members 30. Each connecting member 30 is uniformly arranged along the circumference of the frame member 20. Each connecting member 30 includes a clamping assembly 31 and an adjusting assembly 32. The clamping assembly 31 is installed inside the frame member 20, with one end clamping the bottom electrode 42 and the other end clamping the short mesh 43, thus electrically connecting the bottom electrode 42 and the short mesh 43. The fixed end of the adjusting assembly 32 is fixedly installed on the outside of the frame member 20, and the telescopic end extends into the inside of the frame member 20 and is elastically connected to the clamping assembly 31. This telescopic end is used to adjust the distance between the inner sides of the clamping assemblies 31 of each connecting member 30, or to adapt to the expansion and contraction of the bottom electrode 42 through the elastic connection. The clamping assembly 31 is adjusted to increase the clamping force of the clamping assembly 31 on the bottom electrode 42 and the short mesh 43. Thus, the clamping assembly 31 is adjusted by the adjusting assemblies 32 of each connecting member 30, ensuring that the inner side of the clamping assembly 31 tightly clamps the bottom electrode 42 and the short mesh 43, electrically connecting them. When the bottom electrode 42 of the electric arc furnace expands and deforms under high temperature, the clamping assembly 31 and the adjusting assembly 32 are elastically connected. The clamping assembly 31 moves towards the adjusting assembly 32 under the push of the outer surface of the bottom electrode 42, increasing the distance between the inner sides of the clamping assemblies 31. This causes the clamping force of the clamping assembly 31 on the bottom electrode 42 to change with the shape of the bottom electrode 42, reducing the increase in contact resistance between the bottom electrode 42 and the short mesh 43, thereby reducing the frequency of arc discharge.
[0022] In this embodiment, the shape of the frame member 20 changes with the shape of the bottom electrode 42, and the number of connecting members 30 also changes accordingly. For example, when the bottom electrode 42 is square, the shape of the frame member 20 is square, and the number of connecting members 30 is four.
[0023] In this embodiment, the frame member 20 is made of an insulating material with high temperature resistance, such as alumina ceramic; the connection between the adjustment component 32 and the clamping component 31 is provided with an insulating structure, such as coating the outside of the clamping component 31 with an insulating coating and making the adjustment component 32 with an insulating material, to prevent current leakage between the bottom electrode 42 and the short network 43.
[0024] Please refer to Figure 3 Furthermore, each clamping assembly 31 includes a first clamping member 311, a second clamping member 312, and at least one connecting member 313. The inner side of the first clamping member 311 is used to clamp the bottom electrode 42, and the inner side of the second clamping member 312 is used to clamp the short mesh 43. The two ends of each connecting member 313 are fixedly connected to the first clamping member 311 and the second clamping member 312 respectively, for electrically connecting the first clamping member 311 and the second clamping member 312, so that the first clamping member 311 of each connecting member 30 clamps the bottom electrode 42, and after the second clamping member 312 of each connecting member 30 clamps the short mesh 43, the bottom electrode 42 and the short mesh 43 can be electrically connected.
[0025] In this embodiment, each of the first clamping members 311 and each of the second clamping members 312 are made of a material with good electrical conductivity, such as copper, so as to make the power transmission between the short mesh 43 and the bottom electrode 42 more stable.
[0026] Furthermore, each connector 313 is made of a flexible conductive material, such as a flexible copper busbar, so that the distance between the first clamping member 311 and the second clamping member 312 can adapt to changes. Specifically, in addition to the bottom electrode 42, the short mesh 43 will also expand under high temperature conditions. When the bottom electrode 42 expands and becomes larger at high temperature, causing the distance between the inner sides of each first clamping member 311 to increase, the distance between the inner sides of each second clamping member 312 will not increase accordingly, ensuring that each second clamping member 312 can clamp the short mesh 43. When the short mesh 43 expands and becomes larger at high temperature, causing the distance between the inner sides of each second clamping member 312 to increase, the distance between the inner sides of each first clamping member 311 will not increase accordingly, ensuring that each first clamping member 311 can clamp the bottom electrode 42. If the connector 313 is made of a rigid material, the above functions cannot be achieved.
[0027] In this embodiment, the first clamping member 311 and the second clamping member 312 have the same structure.
[0028] Please refer to Figure 3Furthermore, both the first clamping member 311 and the second clamping member 312 are provided with a liquid inlet 314 and a liquid outlet 315. The liquid inlet 314 is used to introduce coolant into the first clamping member 311 or the second clamping member 312, and the liquid outlet 315 is used to discharge the coolant from the first clamping member 311 or the second clamping member 312. This is to cool down the first clamping member 311 and the second clamping member 312 by circulating coolant, thereby preventing the first clamping member 311 and the second clamping member 312 from deforming at high temperatures. It can also reduce the surface temperature of the bottom electrode 42 and the short mesh 43, and reduce the amount of deformation caused by thermal expansion of the bottom electrode 42 or the short mesh 43.
[0029] Please refer to Figure 4 Furthermore, each adjustment component 32 includes a telescopic member 321, a fixing plate 322, and at least two mounting members 323. The fixed end of the telescopic member 321 is fixedly installed on the outer edge of the frame member 20, and the telescopic end of the telescopic member 321 extends into the frame member 20 and is fixedly connected to the fixing plate 322. Both sides of the fixing plate are fixedly connected to the side of at least one mounting member. The bottom surface of each mounting member 323 is used to elastically connect with the top surface of the first clamping member 311 or the second clamping member 312.
[0030] In this embodiment, the telescopic member 321 is a device with telescopic function, such as a disc spring hydraulic cylinder.
[0031] Please refer to Figures 4 to 5Furthermore, each mounting component 323 has at least one spring assembly 324 mounted on its bottom surface. Each spring assembly 324 includes a first fixing component 3241, a second fixing component 3242, a telescopic rod 3243, and a spring component 3244. The top surface of the first fixing component 3241 is fixedly connected to the bottom surface of the mounting component 323, and the bottom surface is provided with a telescopic cylinder 3245. One end of the telescopic rod 3243 is slidably connected to the telescopic cylinder 3245, and the other end is fixedly connected to the top surface of the second fixing component 3242. The distance between the first fixing component 3241 and the second fixing component 3242 can be adjusted by moving the telescopic rod 3243 within the telescopic cylinder 3245. The bottom surface of the second fixing component 3242 is rotatably connected to the top surface of each first clamping component 311 or each second clamping component 312. When the first clamping component 311 or the second clamping component 312 moves toward the adjusting assembly 32, its The bottom surface can be tilted to better fit the surface of the bottom electrode 42 or short mesh 43, resulting in a lower increase in contact resistance. The spring 3244 is sleeved on the telescopic rod 3243, and its two ends are fixedly connected to the bottom surface of the first fixing member 3241 and the top surface of the second fixing member 3242, respectively. Under the action of the spring 3244, the telescopic rod 3243 extends out of the telescopic cylinder 3245. Thus, when clamping the bottom electrode 42 or short mesh 43, the first clamping member 311 or the second clamping member 312 can clamp the bottom electrode 42 or short mesh 43 under the elastic force of the spring 3244. When the bottom electrode 42 or short mesh 43 expands and deforms under high temperature, the first clamping member 311 or the second clamping member 312 can move towards the adjustment assembly 32 by compressing the spring 3244 to adjust the clamping force on the bottom electrode 42 or short mesh 43.
[0032] In this embodiment, the bottom surface of the second fixing member is provided with a connecting hole 3246, and the top surfaces of the first clamping member and the second clamping member are each provided with at least one connecting group 316. The number of connecting groups 316 is the same as the number of spring groups 324, and they are evenly arranged on the top surface of the first clamping member or the second clamping member. The connecting group 316 includes two connecting plates 3161 and a connecting rod 3162. The two connecting plates 3161 are symmetrically arranged, and the two ends of the connecting rod 3162 are fixedly connected to the two connecting plates 3161 respectively. The connecting rod 3162 is also rotatably connected to the connecting hole 3246 to realize the rotatable connection between the second fixing member 3242 and the first clamping member or the second clamping member.
[0033] Secondly, this utility model provides a DC submerged arc furnace 40, including a furnace body 41, N bottom electrodes 42, N short meshes 43, and N connection devices 10 for the bottom electrodes and short meshes as described in the first aspect. Each bottom electrode 42 is uniformly installed on the bottom of the furnace body 41, and each short mesh 43 is positioned opposite a bottom electrode 42. Each connection device 10 for the bottom electrodes and short meshes is uniformly installed on the outside of the furnace body 41, and each connection device 10 for the bottom electrodes and short meshes is positioned opposite a bottom electrode 42, for electrically connecting the bottom electrode 42 and the short mesh 43; wherein, N≥1.
[0034] In one embodiment, the connection device 10 between the bottom electrode and the short grid is not directly fixed to the body 41 of the electric arc furnace. The bottom of the connection device 10 between the bottom electrode and the short grid and the DC electric arc furnace 40 are provided with a transport device for removing the connection device 10 between the bottom electrode and the short grid and the DC electric arc furnace 40 from the connection point between the bottom electrode 42 and the short grid 43, so as to facilitate the inspection and maintenance of the bottom electrode 42 and the short grid 43.
[0035] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A connection device for a bottom electrode and a short mesh, characterized in that, The device includes a frame member and at least four identical connecting members. Each connecting member is evenly arranged along the circumference of the frame member. Each connecting member includes a clamping component and an adjusting component. The clamping component is installed inside the frame member. One end of the clamping component is used to clamp the bottom electrode, and the other end is used to clamp the short mesh, so that the bottom electrode and the short mesh are electrically connected. The fixed end of the adjusting component is fixedly installed on the outside of the frame member, and the telescopic end extends into the inside of the frame member and is elastically connected to the clamping component. The telescopic end is used to adjust the distance between the inner sides of the clamping components of each connecting member, or to adapt to the expansion and deformation of the bottom electrode through the elastic connection, so as to adjust the clamping force of the clamping component on the bottom electrode and the short mesh.
2. The connection device between the bottom electrode and the short mesh as described in claim 1, characterized in that, The clamping assembly includes a first clamping member, a second clamping member, and at least one connecting member. The inner side of the first clamping member is used to clamp the bottom electrode, and the inner side of the second clamping member is used to clamp the short net. The two ends of each connecting member are fixedly connected to the first clamping member and the second clamping member, respectively, for electrically connecting the first clamping member and the second clamping member.
3. The connection device between the bottom electrode and the short mesh as described in claim 2, characterized in that, Each connector is made of flexible conductive material so that the distance between the first clamping member and the second clamping member can be adapted to change.
4. The connection device between the bottom electrode and the short mesh as described in claim 2, characterized in that, Both the first clamping member and the second clamping member are provided with a liquid inlet and a liquid outlet. The liquid inlet is used to introduce coolant into the first clamping member or the second clamping member, and the liquid outlet is used to discharge the coolant from the first clamping member or the second clamping member, so as to cool the first clamping member and the second clamping member by circulating coolant.
5. The connection device between the bottom electrode and the short mesh as described in claim 2, characterized in that, The adjustment assembly includes a telescopic component, a fixed plate, and at least two mounting components. The fixed end of the telescopic component is fixedly installed on the outer edge of the frame component, and the telescopic end of the telescopic component extends into the frame component and is fixedly connected to the fixed plate. Both sides of the fixed plate are fixedly connected to the side of at least one mounting component. The bottom surface of each mounting component is used to elastically connect with the top surface of the first clamping component or the second clamping component.
6. The connection device between the bottom electrode and the short mesh as described in claim 5, characterized in that, Each mounting component has at least one spring assembly on its bottom surface. Each spring assembly includes a first fixing component, a second fixing component, a telescopic rod, and a spring component. The top surface of the first fixing component is fixedly connected to the bottom surface of the mounting component. The bottom surface is provided with a telescopic cylinder. One end of the telescopic rod is slidably connected to the telescopic cylinder, and the other end is fixedly connected to the top surface of the second fixing component. The distance between the first fixing component and the second fixing component can be adjusted by moving the telescopic rod inside the telescopic cylinder. The bottom surface of the second fixing component is rotatably connected to the top surface of each first clamping component or each second clamping component. The spring component is sleeved on the telescopic rod, and both ends are fixedly connected to the bottom surface of the first fixing component and the top surface of the second fixing component, respectively, so that the telescopic rod extends out of the telescopic cylinder under the action of the spring component.
7. The connection device between the bottom electrode and the short mesh as described in claim 6, characterized in that, The bottom surface of the second fixing member is provided with a connecting hole, and the top surfaces of the first clamping member and the second clamping member are each provided with at least one connecting group. The number of connecting groups is the same as the number of spring groups, and they are evenly arranged on the top surface of the first clamping member or the second clamping member. The connecting group includes two connecting plates and a connecting rod. The two connecting plates are symmetrically arranged, and the two ends of the connecting rod are fixedly connected to the two connecting plates respectively. The connecting rod is also rotatably connected to the connecting hole.
8. A DC submerged arc furnace, characterized in that, The device includes a submerged arc furnace body, N bottom electrodes, N short meshes, and N connection devices for the bottom electrodes and short meshes as described in any one of claims 1 to 7. Each bottom electrode is uniformly installed on the bottom of the submerged arc furnace body, and each short mesh is positioned opposite a bottom electrode. Each connection device for the bottom electrodes and short meshes is uniformly installed on the outside of the submerged arc furnace body, and each connection device for the bottom electrodes and short meshes is positioned opposite a bottom electrode, for electrically connecting the bottom electrodes and short meshes; wherein, N≥1.