Automatic butt joint device for bottom anode circuit of direct current furnace

Abstract

The utility model belongs to the field of metallurgical industry, and relates to a direct current furnace bottom anode line automatic butt joint device which comprises a conductive plate connected with a power supply. The conductive tube is fixedly connected to a bottom anode of the direct current furnace and is electrically connected with the bottom anode, and when the conductive tube is in contact with the upper surface of the conductive plate, the bottom anode is electrified; a sliding sleeve is slidably arranged in the butt joint direction of the conductive tubes, a first butt joint head is fixedly arranged on the lower surface of the conductive plate, and a first butt joint seat matched with the first butt joint head is fixedly arranged on the top face of the sliding sleeve. An elastic piece is arranged in the sliding sleeve, and the elastic piece is configured to apply elastic force for moving towards the first butt joint head to the first butt joint seat after the first butt joint seat is pressed. According to the device provided by the utility model, automatic butt joint of the conductive tube and the conductive plate can be realized, the conductive plate has self-adaptive capability due to the two groups of butt joint mechanisms below the conductive plate and the elastic piece, even if the conductive tube is slightly inclined, the conductive tube can be adaptively attached to the surface of the conductive plate, and the accuracy and stability of butt joint are ensured.

Description

Technical Field

[0001] This utility model belongs to the field of metallurgical industry and relates to an automatic docking device for DC furnace bottom anode lines. Background Technology

[0002] In electric arc furnace steelmaking, the installation location and connection method of the DC hearth anode are crucial to steelmaking efficiency and equipment maintenance. The DC hearth anode is typically installed inside the furnace body, with its lower part connected to a cable via a flexible compensator and bolted connections to ensure stable current transmission and efficient utilization.

[0003] However, during steelmaking, the refractory materials inside the furnace must withstand the continuous scouring and erosion of molten steel at high temperatures, resulting in a relatively short service life. To meet production demands, severely corroded furnace bodies often need to be taken offline and replaced with brand new ones. Each time a furnace body is replaced, workers must manually remove dozens of bolts connecting the flexible compensator and the bottom electrode. These bolts are not only numerous, but also present extremely harsh working conditions due to the high-temperature environment at the furnace bottom and the confined space, making the removal work time-consuming. More seriously, if bolts are accidentally missed during removal, they will pose a serious threat to the cables when the furnace body is subsequently lifted, potentially causing damage to the lines or even irreversible damage, severely affecting the continuity and safety of steelmaking production. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide an automatic connection device for DC furnace bottom anode lines, which can quickly disconnect the connection between the bottom electrode and the power supply when replacing the old furnace body, and automatically connect the bottom electrode and the power supply when installing a new furnace body, thus avoiding the problems of low work efficiency, high labor intensity, harsh working environment and equipment damage caused by manually removing and installing a large number of connecting bolts.

[0005] To achieve the above objectives, this utility model provides an automatic docking device for the bottom anode line of a DC furnace, including a conductive plate connected to a power source; a conductive tube fixedly connected to and electrically connected to the bottom anode of the DC furnace, wherein the bottom anode is energized when the conductive tube contacts the upper surface of the conductive plate; a sliding sleeve is slidably disposed along the docking direction of the conductive tube; a first pair of connectors is fixedly disposed on the lower surface of the conductive plate; a first docking seat that cooperates with the first pair of connectors is fixedly disposed on the top surface of the sliding sleeve; an elastic element is disposed in the sliding sleeve, and the elastic element is configured to apply an elastic force toward the first docking seat to the first docking seat after the first docking seat is pressed.

[0006] Optionally, the opposite ends of the first pair of connectors and the first mating seat respectively have spherical protrusions and spherical grooves that fit together.

[0007] Optionally, the first connecting bolt is fixed in the first connecting seat and penetrates into the first connecting head along the axial direction of the first connecting seat; the first connecting bolt connects the first connecting head and the first connecting seat in a manner allowing the first connecting head to roll in the first connecting seat.

[0008] Optionally, a first connecting hole extending along the axial direction of the first connecting seat is formed in the first connecting seat, and a second connecting hole communicating with the first connecting hole is formed in the first connecting head; the first connecting bolt is fixed in the first connecting seat and penetrates through the first connecting hole and the second connecting hole to connect the first connecting head and the first connecting seat.

[0009] Optionally, the second connecting hole is a H-shaped stepped hole comprising a first hole section, a second hole section and a third hole section communicating with each other, and the end of the first connecting bolt is located in the first hole section; the second connecting head is sleeved on the end of the first connecting bolt, the second connecting seat is fixed on the inner wall of the first hole section, and the opposite ends of the second connecting head and the second connecting seat have a spherical convex and a spherical recess matching with each other.

[0010] Optionally, an insulating plate is arranged between the sliding sleeve and the first connecting seat, and the third connecting bolt penetrates through the first connecting seat, the insulating plate and the top cover of the sliding sleeve to connect the three; wherein the third connecting bolt is provided with an insulating sleeve.

[0011] Optionally, the automatic butt joint device further comprises a support frame, and the sliding sleeve is slidingly arranged in the support frame in a manner of penetrating out of the top surface of the frame.

[0012] Optionally, the top surface of the frame is fixed with a guide sleeve matched with the sliding sleeve, and the sliding sleeve is slidingly matched with the guide sleeve.

[0013] Optionally, a guide rod is slidingly arranged in the support frame; one end of the guide rod penetrates into the sliding sleeve and is connected to the top surface of the sliding sleeve, and the other end penetrates out of the bottom surface of the frame.

[0014] Optionally, the elastic member is a spring sleeved on the guide rod, and a spring stopper is fixed on the inner surface of the bottom surface of the frame; one end of the spring is connected to the inner wall of the top surface of the sliding sleeve, and the other end is connected to the spring stopper.

[0015] The beneficial effects of the utility model lie in:

[0016] The automatic butt joint device for DC furnace bottom anode circuit provided by the utility model can realize automatic butt joint of the conductive pipe and the conductive plate, and specifically, during the installation process of the furnace body, the conductive pipe moves synchronously with the furnace body, when the conductive pipe is pressed on the upper surface of the conductive plate, the two groups of butt joint mechanisms and the elastic member below the conductive plate make the conductive plate have automatic adjustment capacity, even if the conductive pipe has slight inclination, the conductive plate can also be self-adaptively attached on the surface, and the accuracy and stability of butt joint are ensured.

[0017] Further, when the conductive tube is in contact with the conductive plate, the spring enables the conductive plate to automatically adjust the height. This not only can adapt to the possible error of the installation height of the conductive tube, but also ensures that the two conductive surfaces between the conductive tube and the conductive plate can be closely attached, thereby effectively avoiding the electric erosion phenomenon caused by virtual connection, and prolonging the service life of the equipment.

[0018] More importantly, the utility model solves the problem of manually removing or installing a large number of connecting bolts when replacing the furnace body. The traditional operation mode has many defects such as narrow area, large workload, high temperature, poor working environment and long operation time. The automatic butt joint device of the utility model can realize automatic butt joint and adjustment without manual intervention, and is firmly and reliably attached. This not only greatly liberates manpower and improves work efficiency, but also significantly shortens the equipment maintenance time, and further improves the equipment operation rate. For the steel plant, the automatic butt joint device provided by the utility model will directly bring significant economic benefits.

[0019] Other advantages, objects and features of the utility model will be described in the subsequent specification to some extent, and to some extent, it will be obvious to those skilled in the art based on the study of the following text or can be taught from the practice of the utility model. The objects and other advantages of the utility model can be realized and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to make the purpose, technical scheme and advantages of the utility model more clear, the preferred detailed description of the utility model will be combined with the drawings as follows, wherein:

[0021] Figure 1 Structure schematic view of the automatic butt joint device of the direct current furnace bottom anode circuit provided by the utility model;

[0022] Figure 2 Structure schematic view of the automatic butt joint device of the direct current furnace bottom anode circuit provided by the utility model.

[0023] Reference signs:

[0024] 1 - electrically conductive tube; 2 - electrically conductive plate; 3 - cable; 4 - first pair of connectors; 5 - first pair of connector seats; 6 - second pair of connectors; 7 - second pair of connector seats; 8 - first connecting bolt; 9 - second connecting bolt; 10 - insulating plate; 11 - sliding sleeve; 12 - third connecting bolt; 13 - insulating sleeve; 14 - guide rod; 15 - spring; 16 - spring stopper; 17 - support frame; 17.1 - frame top surface; 17.2 - frame bottom surface; 18 - guide sleeve; 19 - fourth connecting bolt; 20 - fifth connecting bolt; 21 - nut; 22 - washer; 23 - first connector hole; 24 - second connector hole; 24.1 - first hole section; 24.2 - second hole section; 24.3 - third hole section. DETAILED DESCRIPTION

[0025] The above and other advantages and effects of the present application will become readily apparent to those of ordinary skill in the art from the following description in conjunction with the accompanying drawings. The present application can also be applied or implemented in other different embodiments, and various modifications or changes can be made to the details of the application based on different viewpoints and applications without departing from the spirit of the application. It should be noted that the drawings provided in the following embodiments are only used to illustrate the basic concept of the present application in a schematic manner, and the following embodiments and features in the embodiments can be combined with each other without conflict.

[0026] It should be noted that the drawings are only used for illustrative description, and the representation is only a schematic diagram, not a physical diagram, and should not be understood as a limitation on the present application. In order to better illustrate the embodiments of the present application, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size. It is understandable to those skilled in the art that some well-known structures and their descriptions in the drawings may be omitted.

[0027] The same or similar reference numerals in the drawings of the embodiments of the present application correspond to the same or similar components; in the description of the present application, it should be understood that if the terms "upper", "lower", "left", "right", "front", "back" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore the positional relationship described in the drawings is only used for illustrative description, and cannot be understood as a limitation on the present application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0028] In the field of electric furnace steelmaking, the installation and connection mode of the direct current bottom anode is of great significance to improve the efficiency of steelmaking and ensure the convenience of equipment maintenance. Generally, the direct current bottom anode is placed inside the furnace body and is closely connected with the cable through the bolt connection of the soft connection compensator, so as to ensure that the current can be stably and efficiently transmitted. However, during the steelmaking process, the high-temperature molten steel in the furnace continuously erodes and corrodes the refractory, resulting in the need to frequently replace the furnace body. When the furnace body is replaced, workers need to manually remove dozens of bolts connecting the soft connection compensator and the bottom electrode. In addition to the high-temperature environment of the furnace bottom area and the narrow operation space, the removal work becomes extremely difficult and time-consuming. If a bolt is inadvertently missed during the removal process, the cable line may be damaged during the subsequent lifting of the furnace body, which seriously affects the continuity and safety of steelmaking production.

[0029] In view of the many disadvantages of the traditional connection mode, the utility model aims to provide a direct current bottom anode line automatic docking device which can quickly and safely disconnect the connection between the bottom electrode and the power supply when replacing the old furnace body, and can automatically and accurately dock the bottom electrode and the power supply when installing the new furnace body.

[0030] As shown in Figure 1 The utility model provides a direct current bottom anode line automatic docking device, which comprises a conductive plate 2 connected to a power supply, and the power supply is preferably a cable 3 mechanically and electrically connected to one side of the conductive plate 2. The conductive pipe 1 is fixedly arranged on the direct current bottom anode and forms an electrical connection therewith, and the conductive pipe 1 moves synchronously with the furnace body. When the furnace body is installed, the conductive pipe 1 moves along the docking direction to the upper surface of the conductive plate 2. When the conductive pipe 1 contacts the upper surface of the conductive plate 2, the electric energy is transmitted to the conductive pipe 1 through the conductive plate 2, and the bottom anode can be successfully powered.

[0031] In order to ensure the conductive area and the conductive efficiency, the two conductive surfaces of the conductive pipe 1 and the conductive plate 2 after docking need to be closely attached. Therefore, a slidable sliding sleeve 11 is arranged in the docking direction of the conductive pipe 1. The lower surface of the conductive plate 2 is fixedly installed with a first docking head 4, and a matching first docking seat 5 is fixedly arranged on the top surface of the sliding sleeve 11. The sliding sleeve 11 is internally provided with an elastic member 15. When the conductive pipe 1 contacts the conductive plate 2, the conductive plate 2, the first docking head 4 and the first docking seat 5 are pressed. The first docking seat 5 is pressed to push the sliding sleeve 11 to move downward and compress the elastic member 15. The compression of the elastic member 15 applies an elastic force to the first docking seat 5 to move towards the first docking head 4, so that the first docking seat 5 tightly pushes the first docking head 4 upward, thereby ensuring that the conductive plate 2 and the conductive pipe 1 are closely attached, and the tightness and conductivity of the conductive plate 2 and the conductive pipe 1 after docking are ensured.

[0032] Further, the opposite ends of the first connector 4 and the first connector seat 5 are respectively provided with a spherical convex and a spherical concave which match with each other, and the spherical convex and the spherical concave improve the flexibility of the connection. In order to avoid the first connector 4 and the first connector seat 5 from being completely separated and to maintain the stability of the connection, the first connector seat 5 is fixedly provided with a first connecting bolt 8 which penetrates into the first connector 4 along the axial direction of the first connector seat 5.

[0033] Further, since the conductive tube 1 has manufacturing errors, it has certain deviations in height or level, which causes the conductive plate 2 to swing to a certain extent during the connection process, which is manifested as the first connector 4 may roll in the first connector seat 5 to a small extent, which makes the first connector 4 and the first connector seat 5 need to have a certain degree of freedom of relative movement while maintaining a stable connection. Based on this, the first connecting bolt 8 is configured to connect the first connector 4 and the first connector seat 5 in a way that allows the first connector 4 to roll in the first connector seat 5, thereby achieving a firm and flexible connection effect.

[0034] Figure 2 (a) is a schematic diagram of the internal structure of the first connector 4 and the first connector seat 5 during normal connection, Figure 2 (b) is a schematic diagram of the internal structure of the first connector 4 and the first connector seat 5 when the first connector 4 rolls in the first connector seat 5 to a small extent. Specifically, the first connector seat 5 is provided with a first connecting hole 23 extending along the axial direction thereof, and the first connector 4 is provided with a second connecting hole 24 which is in communication with the first connecting hole 23. The first connecting bolt 8 is threadedly connected in the first connector seat 5 and penetrates through the first connecting hole 23 and the second connecting hole 24 to tightly connect the first connector 4 and the first connector seat 5 together.

[0035] The second connecting hole 24 is a H-shaped stepped hole which includes a first hole section 24.1, a second hole section 24.2 and a third hole section 24.3 which are in communication with each other, and in particular, the inner diameter of the second hole section 24.2 < the inner diameter of the first hole section 24.1 < the inner diameter of the third hole section 24.3 < the inner diameter of the first connecting hole 23. The end of the first connecting bolt 8 is located in the first hole section 24.1, the second connector 6 is sleeved on the end of the first connecting bolt 8, and the second connector seat 7 is fixedly arranged in the inner wall of the first hole section 24.1. The second connector 6 and the second connector seat 7 are respectively provided with a spherical convex and a spherical concave which match with each other. When the first connector 4 rolls in the first connector seat 5 to a small extent, the second connector 6 and the second connector seat 7 also roll relative to each other, which further enhances the stability and flexibility of the connection of the first connector 4 and the first connector seat 5.

[0036] Further, the automatic butt joint device also comprises a support frame 17, the support frame 17 has a frame top surface 17.1 and a frame bottom surface 17.2, and the sliding sleeve 11 is slidably arranged in the frame top surface 17.1. In order to guide the sliding direction of the sliding sleeve 11, the frame top surface 17.1 is fixedly provided with a guide sleeve 18 matched with the sliding sleeve 11, so that the sliding sleeve 11 can smoothly slide along the direction of the guide sleeve 18. Meanwhile, a guide rod 14 is also slidably arranged in the support frame 17, one end of the guide rod 14 penetrates into the sliding sleeve 11 and is threadedly connected to the top surface of the sliding sleeve 11, and the other end penetrates out of the frame bottom surface 17.2, and the end of the guide rod 14 outside the support frame 17 is provided with a washer 22 and a nut 21.

[0037] Further, the guide rod 14 is sleeved with a spring 15, and a spring block 16 is fixedly arranged on the inner surface of the frame bottom surface 17.2. One end of the spring 15 is connected to the inner wall of the top surface of the sliding sleeve 11, and the other end is connected to the spring block 16. When the sliding sleeve 11 is subjected to pressure, the spring 15 is compressed, thereby exerting an upward restoring force on the sliding sleeve 11, so that the first butt joint seat 5 tightly abuts against the first butt joint 4, thereby ensuring the close abutment of the conductive plate 2 and the end surface of the conductive pipe 1.

[0038] In some optional embodiments, the conductive plate 2 and the first butt joint 4 are fixedly connected through a second connecting bolt 9.

[0039] In some optional embodiments, an insulating plate 10 is arranged between the sliding sleeve 11 and the first butt joint seat 5, and a third connecting bolt 12 penetrates through the first butt joint seat 5, the insulating plate 10 and the top cover of the sliding sleeve 11 to tightly connect the three together. Meanwhile, an insulating sleeve 13 is also sleeved on the third connecting bolt 12 to further enhance the insulation effect.

[0040] In some optional embodiments, the guide sleeve 18 and the frame top surface 17.1 are fixedly connected through a fourth connecting bolt 19.

[0041] In some optional embodiments, the spring block 16 and the frame bottom surface 17.2 are fixedly connected through a fifth connecting bolt 20.

[0042] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model and are not limited, although the utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the utility model can be modified or replaced equivalently without departing from the purpose and scope of the technical solutions, and all should be covered in the claim scope of the utility model.

Claims

1. An automatic docking device for DC furnace bottom anode lines, characterized in that: The device comprises a conductive plate (2) connected with a power supply; a conductive pipe (1) is fixedly connected with and electrically connected to a bottom anode of a direct current furnace, and the bottom anode is powered when the conductive pipe (1) is in contact with the upper surface of the conductive plate (2). A sliding sleeve (11) is arranged to slide along the butt joint direction of the conductive pipe (1), and a first butt joint (4) is fixedly arranged on the lower surface of the conductive plate (2); a first butt joint seat (5) matched with the first butt joint (4) is fixedly arranged on the top surface of the sliding sleeve (11). An elastic member is arranged in the sliding sleeve (11), and the elastic member is configured to apply an elastic force to the first butt joint seat (5) to move towards the first butt joint (4) after the first butt joint seat (5) is pressed.

2. The automatic butt-welding device for DC bottom anode line according to claim 1, characterized in that: The opposite ends of the first butt joint (4) and the first butt joint seat (5) respectively have a spherical convex and a spherical recess which match with each other.

3. The automatic butt-welding device for DC bottom anode busbar according to claim 1, characterized in that: A first connecting bolt (8) is fixedly arranged in the first butt joint seat (5) and penetrates into the first butt joint (4) along the axial direction of the first butt joint seat (5); the first connecting bolt (8) connects the first butt joint (4) and the first butt joint seat (5) in a manner allowing the first butt joint (4) to roll in the first butt joint seat (5).

4. The automatic butt-welding device for DC bottom anode busbars according to claim 3, characterized in that: A first butt joint hole (23) extending along the axial direction of the first butt joint seat (5) is arranged in the first butt joint seat (5), and a second butt joint hole (24) communicated with the first butt joint hole (23) is arranged in the first butt joint (4); the first connecting bolt (8) is fixedly arranged in the first butt joint seat (5) and penetrates through the first butt joint hole (23) and the second butt joint hole (24) to connect the first butt joint (4) and the first butt joint seat (5).

5. The automatic butt-welding device for DC bottom anode busbars according to claim 4, characterized in that: The second butt joint hole (24) is a I-shaped stepped hole comprising a first hole section (24.1), a second hole section (24.2) and a third hole section (24.3) communicated with each other, and the end of the first connecting bolt (8) is located in the first hole section (24.1); A second butt joint (6) is sleeved on the end of the first connecting bolt (8), and a second butt joint seat (7) is fixedly arranged on the inner wall of the first hole section (24.1); the opposite ends of the second butt joint (6) and the second butt joint seat (7) respectively have a spherical convex and a spherical recess which match with each other.

6. The automatic butt-stripping device for DC bottom anode bus line according to claim 1, characterized in that: An insulating plate (10) is arranged between the sliding sleeve (11) and the first butt joint seat (5), and a third connecting bolt (12) penetrates through the first butt joint seat (5), the insulating plate (10) and the top cover of the sliding sleeve (11) to connect them; an insulating sleeve (13) is arranged on the third connecting bolt (12).

7. The automatic butt-stripping device for DC bottom anode bus line according to claim 1, characterized in that: The automatic butt joint device further comprises a support frame (17), and the sliding sleeve (11) is arranged in the support frame (17) in a manner penetrating through the top surface (17.1) of the frame.

8. The automatic butt-stripping device for DC bottom anode bus line according to claim 7, characterized in that: The frame top surface (17.1) is fixedly provided with a guide sleeve (18) matched with the sliding sleeve (11), and the sliding sleeve (11) is in sliding cooperation with the guide sleeve (18).

9. The automatic butt-stripping device for DC bottom anode bus line according to claim 7, characterized in that: A guide rod (14) is slidably arranged in the support frame (17); one end of the guide rod (14) penetrates into the sliding sleeve (11) and is connected to the top surface of the sliding sleeve (11), and the other end penetrates out of the frame bottom surface (17.2).

10. The automatic butt-stripping device for DC bottom anode bus line according to claim 9, characterized in that: The elastic member is a spring (15) sleeved on the guide rod (14), and a spring stopper (16) is fixedly arranged on the inner surface of the frame bottom surface (17.2); one end of the spring (15) is connected to the inner wall of the top surface of the sliding sleeve (11), and the other end is connected to the spring stopper (16).

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