Connecting device for facilitating maintenance of bottom electrode and short net and direct current electric arc furnace

Abstract

This utility model relates to the field of DC submerged arc furnace technology, and particularly to a connection device and a DC submerged arc furnace that facilitates the inspection and maintenance of the bottom electrode and short grid. The device is disposed between the bottom electrode and the short grid, and includes a connecting component and a telescopic component. The connecting component includes two identical and electrically connected contact components. Both ends of the telescopic component are retractable and fixedly connected to the inner sides of the two contact components. The outer sides of the two contact components are used to contact the bottom electrode and the short grid, respectively. The telescopic component controls the extension or retraction of the two contact components to connect or disconnect the bottom electrode and the short grid. Thus, the bottom electrode and the short grid are electrically connected through the two contact components. When inspection and maintenance of the bottom electrode and the short grid are required, simply retracting the two contact components via the telescopic component separates the bottom electrode and the short grid, shortening the inspection and maintenance time and improving efficiency.

Description

Technical Field

[0001] This utility model relates to the field of DC submerged arc furnace technology, and in particular to a connection device and DC submerged arc furnace that facilitates inspection and maintenance of the bottom electrode and short grid. 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, thereby meeting the requirements for melting and reduction reactions of the materials. The bottom electrode and the short grid are key components connecting the power supply and the conductive system inside the furnace; the reliability of their connection directly affects the power transmission efficiency and the safety of the submerged arc furnace operation. Currently, the mainstream connection method for the bottom electrode and the short grid is bolt fastening. Conductive bolts are used to fix the connection plate between the bottom electrode and the short grid, thus achieving electrical connection between the bottom electrode and the short grid.

[0003] Because the electric arc furnace operates under high temperature, high load, strong corrosion and vibration conditions for a long time, the connection between the bottom electrode and the short mesh is prone to oxidation, rust and loose bolts, which increases the contact resistance between the bottom electrode and the short mesh, causing overheating at the connection and increased energy consumption of the electric arc furnace. At the same time, the bottom electrode and the short mesh may develop cracks and wear under thermal stress, posing safety hazards such as short circuits and furnace leakage, thus affecting the stability of the electric arc furnace smelting. Therefore, it is necessary to regularly inspect and maintain the bottom electrode and the short mesh of the electric arc furnace.

[0004] The existing bolt fastening connection method has the following problems in the inspection and maintenance process: the bottom electrode and the short mesh rely on multiple sets of bolts for mechanical fixation. However, the bolts are exposed to high temperature, high load, strong corrosion and vibration environment for a long time, and the surface is prone to rust, which makes it difficult for operators to disassemble, prolongs the inspection and maintenance time and reduces the efficiency of inspection and maintenance. Utility Model Content

[0005] In view of this, it is necessary to provide a connection device and a DC submerged arc furnace that facilitates the inspection and maintenance of the bottom electrode and short grid, thereby shortening the inspection and maintenance time of the bottom electrode and short grid and improving the inspection and maintenance efficiency.

[0006] In a first aspect, this utility model provides a connection device for easy inspection and maintenance of the bottom electrode and the short network. It is disposed between the bottom electrode and the short network and includes a connecting member and a telescopic member. The connecting member includes two contact components with the same structure and electrically connected. Both ends of the telescopic member can be extended and retracted, and both ends are fixedly connected to the inner side of the two contact components respectively. The outer side of the two contact components is used to contact the bottom electrode and the short network respectively, so as to control the extension or retraction of the two contact components through the telescopic member to connect or disconnect the bottom electrode and the short network.

[0007] Preferably, the two contact components are connected by at least one conductive flexible connection component, each of which consists of several connectors with the same structure.

[0008] Preferably, each contact component includes a conductive connecting cavity and a set of movable wheels. The top surface of the connecting cavity is provided with a water inlet and a water outlet for injecting coolant into the connecting cavity to cool it down. The set of movable wheels is installed at the bottom of the connecting cavity to facilitate the extension and retraction of the connecting cavity under the drive of the telescopic component.

[0009] Preferably, the telescopic component includes at least one telescopic component and a linkage component. The fixed end of each telescopic component is installed between two contact components, and the telescopic end is fixedly connected to one of the contact components to extend or retract the contact component. The two ends of the linkage component are respectively connected to the two contact components to enable the two contact components to extend or retract synchronously.

[0010] Preferably, the telescopic assembly includes a telescopic frame and at least one telescopic member. The telescopic frame is located between two contact components. The fixed end of the telescopic member is fixedly installed on the top surface of the telescopic frame, and the telescopic end is fixedly connected to the contact components to extend or retract the contact components.

[0011] Preferably, the telescopic assembly further includes a set of transport wheels, which are mounted on the bottom surface of the telescopic frame for moving the telescopic frame; and the transport wheels have a locking function for locking the telescopic frame after it has been moved to a suitable position.

[0012] Preferably, the linkage component includes a fixed frame and two identical linkage groups. The fixed frame is fixedly installed on the top surface of the telescopic frame, and the two linkage groups are respectively installed on both sides of the fixed frame. The two ends of the two linkage groups are respectively connected to two contact components to enable the two contact components to move synchronously.

[0013] Preferably, the connecting cavity has two identical mounting groups symmetrically arranged along the vertical direction of the connecting cavity on the side facing the telescopic member. Each mounting group includes a top mounting component and a bottom mounting component. The top mounting component and the bottom mounting component are symmetrically arranged along the horizontal direction of the connecting cavity, and the top mounting component is located above the bottom mounting component. Each linkage group includes two identical connecting rods. The middle of the two connecting rods can be rotatably mounted on the fixed frame. One end of each connecting rod is rotatably connected to the top mounting component of one connecting cavity, and the other end is rotatably connected to the bottom mounting component of the other connecting cavity. The two ends of the connecting rods can slide up and down in the top mounting component or the bottom mounting component, so that the two connecting cavities move synchronously under the action of the two connecting rods.

[0014] Preferably, the connection device for facilitating inspection and maintenance of the bottom electrode and short network further includes a heat dissipation component, which includes at least one heat dissipation fan. Each heat dissipation fan is evenly installed in the fixed frame and blows air upwards to reduce the temperature inside the two contact components. The connecting cavity is evenly provided with a number of heat dissipation fins on the side facing the telescopic component to reduce the temperature of the connecting cavity under the blowing of each heat dissipation fan.

[0015] Secondly, this utility model provides a DC submerged arc furnace, including a furnace body and at least one connection device as described in the first aspect for facilitating the inspection and maintenance of the bottom electrode and the short grid. The bottom of the furnace body is provided with at least one bottom electrode, and each bottom electrode is provided with a corresponding short grid. Each connection device for facilitating the inspection and maintenance of the bottom electrode and the short grid is disposed between a bottom electrode and the corresponding short grid for electrically connecting the bottom electrode and the short grid.

[0016] The aforementioned connection device, which facilitates the inspection and maintenance of the bottom electrode and the short network, is positioned between the bottom electrode and the short network. This device includes a connecting component and a telescopic component. The connecting component comprises two identical and electrically connected contact assemblies. Both ends of the telescopic component are retractable and fixedly connected to the inner sides of the two contact assemblies. The outer sides of the two contact assemblies are used to contact the bottom electrode and the short network, respectively. The telescopic component controls the extension or retraction of the two contact assemblies to connect or disconnect the bottom electrode and the short network. Thus, the bottom electrode and the short network are electrically connected via the two contact assemblies. When inspection and maintenance are required, simply retracting the two contact assemblies via the telescopic component separates the bottom electrode and the short network. After inspection and maintenance, extending the two contact assemblies via the telescopic component reconnects the bottom electrode and the short network. Compared to existing bolt-fastened connections, the connection device provided by this invention offers more convenient disassembly, shortening the inspection and maintenance time of the bottom electrode and the short network, thereby improving inspection and maintenance efficiency. Attached Figure Description

[0017] Figure 1 This is a perspective view of the connection device for facilitating inspection and maintenance of the bottom electrode and the short wire, as described in this application, installed between the bottom electrode and the short wire.

[0018] Figure 2 This is a perspective view of the connection device for facilitating inspection and maintenance of the bottom electrode and short network according to this application.

[0019] Figure 3 This is a perspective view of the contact component of this application.

[0020] Figure 4 This is a perspective view of the telescopic component of this application.

[0021] Figure 5 This is a perspective view of the DC submerged arc furnace of this application.

[0022] The diagram shows: a connecting device 10 for easy inspection and maintenance of the bottom electrode and short mesh, a connecting component 20, a contact component 21, a connecting cavity 211, a water inlet 212, a drain outlet 213, a set of moving wheels 214, a mounting assembly 215, a top mounting component 2151, a bottom mounting component 2152, a heat sink 216, a flexible connecting component 22, a connecting component 221, a telescopic component 30, a telescopic assembly 31, a telescopic frame 311, a telescopic component 312, a set of transporting wheels 313, a linkage assembly 32, a fixed frame 321, a connecting rod assembly 322, a connecting rod 3221, a heat dissipation component 40, a heat dissipation fan 41, a DC electric arc furnace 50, an electric arc furnace body 51, a bottom electrode 511, and a short mesh 512. Detailed Implementation

[0023] 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.

[0024] Please refer to Figure 1In a first aspect, this utility model provides a connection device 10 for easy inspection and maintenance of the bottom electrode and the short mesh, disposed between the bottom electrode 511 and the short mesh 512. It includes a connecting member 20 and a telescopic member 30. The connecting member 20 includes two identical and electrically connected contact components 21. Both ends of the telescopic member 30 are extendable and retractable, and both ends are fixedly connected to the inner sides of the two contact components 21 respectively. The outer sides of the two contact components 21 are respectively used to contact the bottom electrode 511 and the short mesh 512, so that the extension or retraction of the two contact components 21 can be controlled by the telescopic member 30 to connect or disconnect the bottom electrode 511 and the short mesh 512. The bottom electrode 511 and the short mesh 512 are electrically connected by two contact components 21. When maintenance operations are required on the bottom electrode 511 and the short mesh 512, the bottom electrode 511 and the short mesh 512 can be separated simply by retracting the two contact components 21 through the telescopic member 30. After maintenance is completed, the bottom electrode 511 and the short mesh 512 can be reconnected simply by extending the two contact components 21 through the telescopic member 30. Compared with the existing bolt-fastening connection method, the connection device 10 provided by this utility model is easier to disassemble, thereby shortening the maintenance time of the bottom electrode 511 and the short mesh 512 and improving maintenance efficiency.

[0025] Furthermore, the two contact components 21 are connected by at least one conductive flexible connection component 22. Each flexible connection component 22 is composed of several connectors 221 with the same structure to reduce the resistance when the two contact components 21 are retracted. Specifically, the resistance that needs to be overcome when folding is smaller than that when folding a single connector, just like the difference between folding a single piece of cloth and folding several strips of cloth at the same time.

[0026] In this embodiment, the connector 221 is made of conductive copper strip.

[0027] In this embodiment, two flexible connection components 22 are provided between the two contact components 21 to connect the circuit from both ends of the two contact components 21, thereby improving the stability of the current.

[0028] Please refer to Figures 2 to 3 Furthermore, each contact component 21 includes a conductive connecting cavity 211 and a set of movable wheels 214. The top surface of the connecting cavity 211 is provided with a water inlet 212 and a drain outlet 213 for injecting coolant, such as pure water, into the connecting cavity 211 to cool it down, thereby reducing the probability of deformation of the connecting cavity 211 under high temperature conditions. At the same time, it can also reduce the temperature of the bottom electrode 511 or the short mesh 512 and reduce the deformation of the outer edge of the bottom electrode 511 and the short mesh 512 under high temperature conditions. The set of movable wheels 214 is installed at the bottom of the connecting cavity 211 so that the connecting cavity 211 can extend and retract under the drive of the telescopic member 30.

[0029] In this embodiment, the connecting cavity 211 is made of a conductive material that can operate normally under high temperature conditions, such as copper; the connecting cavity 211 is provided with a cooling pipe for circulating coolant, and the cooling pipe is made of a material with good heat dissipation performance, such as copper.

[0030] Please refer to Figure 2 For further details, please refer to Figure 4 Furthermore, the telescopic component 30 includes at least one telescopic component 31 and a linkage component 32. The fixed end of each telescopic component 31 is installed between two contact components 21, and the telescopic end is fixedly connected to one of the contact components 21 to extend or retract the contact component 21. The two ends of the linkage component 32 are respectively connected to the two contact components 21 to enable the two contact components 21 to extend or retract synchronously.

[0031] In this embodiment, there are two telescopic components 31, which respectively push the two contact components 21 to extend or retract, thereby improving the stability of the movement of the contact components 21.

[0032] Please refer to Figure 4 Furthermore, the telescopic assembly 31 includes a telescopic frame 311 and at least one telescopic member 312. The telescopic frame 311 is located between two contact assemblies 21. The fixed end of the telescopic member 312 is fixedly installed on the top surface of the telescopic frame 311, and the telescopic end is fixedly connected to the contact assembly 21 for extending or retracting the contact assembly 21.

[0033] In this embodiment, the telescopic member 312 is a hydraulic rod to ensure normal operation under high-temperature conditions.

[0034] Please refer to Figure 4 Furthermore, the telescopic assembly 31 also includes a set of transport wheels 313, which is installed on the bottom surface of the telescopic frame 311 for moving the telescopic frame 311; and the set of transport wheels 313 also has a locking function for locking the telescopic frame 311 after it has been moved to a suitable position.

[0035] Please refer to Figure 4 Furthermore, the linkage component 32 includes a fixed frame 321 and two identical linkage groups 322. The fixed frame 321 is fixedly installed on the top surface of the telescopic frame 311, and the two linkage groups 322 are respectively installed on both sides of the fixed frame 321. Both ends of the two linkage groups 322 are respectively connected to two contact components 21 to enable the two contact components 21 to move synchronously.

[0036] Please refer to Figures 3 to 4Furthermore, on the side of the connecting cavity 211 facing the telescopic member 30, two identical mounting groups 215 are symmetrically arranged along the vertical direction of the connecting cavity 211. Each mounting group 215 includes a top mounting member 2151 and a bottom mounting member 2152. The top mounting member 2151 and the bottom mounting member 2152 are symmetrically arranged along the horizontal direction of the connecting cavity 211, and the top mounting member 2151 is located above the bottom mounting member 2152. Each connecting rod group 322 includes two identical connecting rods 3221. The middle parts of the two connecting rods 3221 are rotatably mounted on the fixed frame 321, and one end of each connecting rod 3221 is connected to a connecting cavity. The top mounting part 2151 of body 211 is rotatably connected, and the other end is rotatably connected to the bottom mounting part 2152 of another connecting cavity 211, and satisfies the following: both ends of the connecting rod 3221 can slide up and down in the top mounting part 2151 or the bottom mounting part 2152, so that the two connecting cavities 211 move synchronously under the action of the two connecting rods 3221; specifically, when one connecting cavity 211 extends or retracts, one end of each connecting rod rotates around the middle of the connecting rod 3221 under the traction of the connecting cavity 211, and the other end rotates synchronously, driving the other connecting cavity 211 to extend or retract, thereby realizing the synchronous movement of the two connecting cavities 211.

[0037] In this embodiment, both the top mounting member 2151 and the bottom mounting member 2152 have rectangular mounting slots. Both ends of each connecting rod 3221 are provided with cylindrical sliding rods. The diameter of each sliding rod is slightly smaller than the width of the mounting slot, and each sliding rod is engaged in the rectangular mounting slot so that both ends of the connecting rod 3221 can slide up and down in the top mounting member 2151 or the bottom mounting member 2152, and are rotatably connected to the top mounting member 2151 and the bottom mounting member 2152.

[0038] Furthermore, the connection device 10, which facilitates inspection and maintenance of the bottom electrode and short network, also includes a heat dissipation component 40. The heat dissipation component 40 includes at least one heat dissipation fan 41, each heat dissipation fan 41 being evenly installed in the fixing frame 321 with the air blowing direction upward, for reducing the temperature inside the two contact components 21. A plurality of heat dissipation fins 216 are evenly provided on the side of the connection cavity 211 facing the telescopic component 30, for reducing the temperature of the connection cavity 211 under the blowing of each heat dissipation fan 41. In this way, the temperature of the connection cavity 211 can be further reduced by the heat dissipation fan 41 and the heat dissipation fins 216, further reducing the probability of deformation of the connection cavity 211 under high temperature conditions.

[0039] Please refer to Figure 5Secondly, this utility model provides a DC submerged arc furnace 50, including a submerged arc furnace body 51 and at least one connection device 10 as described in the first aspect for facilitating the inspection and maintenance of the bottom electrode and the short grid. The bottom of the submerged arc furnace body 51 is provided with at least one bottom electrode 511, and each bottom electrode 511 is provided with a corresponding short grid 512. Each connection device 10 for facilitating the inspection and maintenance of the bottom electrode and the short grid is disposed between a bottom electrode 511 and the corresponding short grid 512 for electrically connecting the bottom electrode 511 and the short grid 512.

[0040] Example 1: Inspection and maintenance process of bottom electrodes and short grid of electric arc furnace 1. Cut off the power supply to the electric arc furnace; 2. The two connecting cavities 211 are retracted by the telescopic component 312, separating them from the bottom electrode 511 and the short mesh 512 respectively; 3. Release the lock on the transport wheel assembly 313; 4. The connecting device 10, which facilitates inspection and maintenance of the bottom electrode and the short network, is pushed out from between the bottom electrode 511 and the short network 512; 5. Perform inspection and maintenance operations on the bottom electrode 511 and the short mesh 512; 6. Push the connecting device 10, which facilitates inspection and maintenance of the bottom electrode and the short network, between the bottom electrode 511 and the short network 512; 7. When the two contact components 21 are aligned with the bottom electrode 511 and the short mesh 512 respectively, the transport wheel assembly 313 is locked; 8. The two connecting cavities 211 are extended through the telescopic component 312 and contact the bottom electrode 511 and the short mesh 512 respectively; 9. Restore power to the electric arc furnace.

[0041] 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 facilitating maintenance of a ground electrode and a short net, provided between the ground electrode and the short net, characterized in that, It includes a connecting member and a telescopic member. The connecting member includes two contact components with the same structure and electrical connection. Both ends of the telescopic member can be extended and retracted, and both ends are fixedly connected to the inner side of the two contact components respectively. The outer side of the two contact components is used to contact the bottom electrode and the short mesh respectively, so as to control the extension or retraction of the two contact components through the telescopic member to connect or disconnect the bottom electrode and the short mesh.

2. The connection device for facilitating maintenance of a bottom electrode and a short net in claim 1, wherein, The two contact components are connected by at least one conductive flexible connection component, each of which consists of several connectors with the same structure.

3. The connection device of claim 1, wherein, Each contact component includes a conductive connecting cavity and a set of movable wheels. The top surface of the connecting cavity is provided with a water inlet and a water outlet for injecting coolant into the connecting cavity to cool it down. The set of movable wheels is installed at the bottom of the connecting cavity to facilitate the extension and retraction of the connecting cavity under the drive of the telescopic component.

4. The connection device of claim 3, wherein the device is configured to facilitate repair of the bottom electrode and the shorting web. The telescopic component includes at least one telescopic component and a linkage component. The fixed end of each telescopic component is installed between two contact components, and the telescopic end is fixedly connected to one of the contact components to extend or retract the contact component. The two ends of the linkage component are respectively connected to the two contact components to enable the two contact components to extend or retract synchronously.

5. The connection device of claim 4, wherein the device is configured to facilitate repair of the bottom electrode and the shorting web. The telescopic assembly includes a telescopic frame and at least one telescopic component. The telescopic frame is located between two contact components. The fixed end of the telescopic component is fixedly installed on the top surface of the telescopic frame, and the telescopic end is fixedly connected to the contact components to extend or retract the contact components.

6. The connection device of claim 5, wherein, The telescopic assembly also includes a set of transport wheels, which are installed on the bottom surface of the telescopic frame for moving the telescopic frame; and the transport wheels have a locking function for locking the telescopic frame after it has been moved to a suitable position.

7. The connection device of claim 6, wherein, The linkage component includes a fixed frame and two identical linkage groups. The fixed frame is fixedly installed on the top surface of the telescopic frame, and the two linkage groups are respectively installed on both sides of the fixed frame. The two ends of the two linkage groups are respectively connected to two contact components to enable the two contact components to move synchronously.

8. The connection device of claim 7, wherein, The connecting cavity has two identical mounting groups symmetrically arranged along the vertical direction of the connecting cavity on the side facing the telescopic member. Each mounting group includes a top mounting component and a bottom mounting component. The top mounting component and the bottom mounting component are symmetrically arranged along the horizontal direction of the connecting cavity, and the top mounting component is located above the bottom mounting component. Each linkage group includes two identical connecting rods. The middle of the two connecting rods can be rotatably mounted on the fixed frame. One end of each connecting rod is rotatably connected to the top mounting component of one connecting cavity, and the other end is rotatably connected to the bottom mounting component of the other connecting cavity. The two ends of the connecting rods can slide up and down in the top mounting component or the bottom mounting component, so that the two connecting cavities move synchronously under the action of the two connecting rods.

9. The connection device of claim 7, wherein, The connection device for facilitating inspection and maintenance of the bottom electrode and short network also includes a heat dissipation component. The heat dissipation component includes at least one heat dissipation fan. Each heat dissipation fan is evenly installed in the fixed frame and blows air upwards to reduce the temperature inside the two contact components. The connecting cavity is evenly provided with several heat dissipation fins on the side facing the telescopic component to reduce the temperature of the connecting cavity under the blowing of each heat dissipation fan.

10. A direct current (DC) arc furnace, characterized by The device includes a submerged arc furnace body and at least one connection device as described in any one of claims 1 to 9 for facilitating inspection and maintenance of the bottom electrode and the short grid. The bottom of the submerged arc furnace body is provided with at least one bottom electrode, and each bottom electrode is provided with a corresponding short grid. Each connection device for facilitating inspection and maintenance of the bottom electrode and the short grid is provided between a bottom electrode and the corresponding short grid for electrically connecting the bottom electrode and the short grid.

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