A tool for connecting electrodes to a lf refining furnace

Abstract

The utility model discloses a special tool of electrode of LF refining furnace, including electrode clamping device and labor -saving stick, electrode clamping device includes two half circular rings, and the first end of two is hinged together through hinged axle, and the tail end is detachably connected through the thread tension mechanism, makes two half circular rings splicing into a circular ring and clamping electrode, and the outside of circular ring is fixed with a plurality of labor -saving stick insertion slot that evenly distributes around electrode, one end of labor -saving stick is inserted into a labor -saving stick insertion slot, and the rotating moment is applied to electrode clamping device. The utility model utilizes the thread tension mechanism to make two half circular rings clamp the electrode of LF refining furnace, and the electrode diameter fluctuates greatly without replacing the tool, has very strong versatility, and the hindrance of electrode is avoided by inserting the labor -saving stick into different labor -saving stick insertion slots, eliminates the limitation to the length of force arm, and can provide larger torsional moment. Utilize this tool to reduce the labor intensity of operating personnel, improve the connection quality and connection efficiency of electrode.

Description

Technical Field

[0001] This utility model relates to a special tool for connecting electrodes in an LF refining furnace, which can improve the connection quality and efficiency of the electrodes in the LF refining furnace, and belongs to the technical field of LF refining furnace electrode maintenance tools. Background Technology

[0002] The LF refining furnace is the most common ladle refining equipment in the metallurgical industry. It mainly relies on graphite electrodes to heat the molten steel in the ladle and slag. During the heating process of the molten steel in the ladle by the graphite electrodes, the graphite electrodes will be continuously worn. When the electrodes are worn to a certain extent, an electrode connection operation must be performed to ensure that the electrodes are of sufficient length.

[0003] The electrodes in the LF refining furnace are connected by threads, requiring operators to enter the protective mesh door after power is off to tighten the graphite electrodes and prevent them from loosening or falling off during heating. Due to the high temperature, confined space, and heavy electrodes inside the mesh door, electrode connection is difficult and inefficient. Therefore, the usability of the electrode connection tools significantly impacts the operator's workload and the quality of the connection.

[0004] Utility model patent application number CN201621091644.7 discloses a quick electrode connection torque wrench for LF refining furnaces. The technical solution is as follows: the clamp is a semi-circular steel structure. The upper end of the clamp is connected to the upper connecting seat via a rotating shaft. The lower end of the lever arm is connected to the upper part of the upper connecting seat via a locking bolt. A friction plate is connected to the lower surface of the upper connecting seat. The lower end of the clamp is connected to the lower connecting seat via a locking bolt. A friction plate is connected to the upper surface of the lower connecting seat. The friction plates of the upper and lower connecting seats are parallel and opposite to each other. This utility model has a simple structure, is easy to carry, requires no multiple operators, causes minimal damage to the electrode surface, and achieves complete tightening. Tightened electrodes are less prone to loosening or gaps under vibration during subsequent heating, preventing electrode breakage accidents caused by loose connections. It is particularly suitable for online connection of three-phase electrodes with special layouts, greatly shortening the electrode tightening time. However, due to the large number of graphite electrode manufacturers and the varying processing precision of their electrodes, it is common for electrodes of the same specifications from the same manufacturer to have diameter differences exceeding 10mm. This means that existing electrode connection tools cannot adapt to the fluctuations in electrode diameter, necessitating the use of multiple sizes of connection tools. This not only increases tooling costs but also reduces work efficiency due to frequent tool replacements. Furthermore, because the three-phase electrode spacing in the LF refining furnace is small, connecting one phase electrode can obstruct the rotation of the long lever arm tool when connecting the other two phase electrodes. Therefore, existing electrode connection tools are all short-torque tools with low torsional torque, which cannot guarantee the connection quality of the electrodes, thus requiring improvement. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a special electrode connection tool for LF refining furnaces, thereby reducing the labor intensity of operators and improving the connection quality and efficiency of LF refining furnace electrodes.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A special electrode-connecting tool for an LF refining furnace includes an electrode clamping device and a force-saving bar. The electrode clamping device includes two semi-circular rings, the first ends of which are hinged together by a hinge shaft, and the second ends are detachably connected by a threaded tightening mechanism, so that the two semi-circular rings are spliced ​​into a circular ring and clamp the electrode of the LF refining furnace. Multiple force-saving bar slots evenly distributed around the electrode are fixed on the outer side of the circular ring. One end of the force-saving bar is inserted into a force-saving bar slot to apply a rotational torque to the electrode clamping device.

[0007] The electrode connection tool for the aforementioned LF refining furnace includes a threaded tightening mechanism comprising a rotating shaft, a connecting stud, and a sleeve. Connecting seats are fixed to the outer sides of the tail ends of both semicircular rings. The head end of the connecting stud is rotatably connected to the connecting seat on the outer side of the tail end of the second semicircular ring via the rotating shaft. A groove matching the connecting stud is provided on the connecting seat on the outer side of the tail end of the first semicircular ring. The width of the groove is greater than the diameter of the connecting stud but smaller than the diameter of the sleeve. An internal thread matching the external thread of the connecting stud is provided on the inner wall of the sleeve. The head end of the sleeve and the tail end of the connecting stud are threaded together. A rotating handle is installed at the tail end of the sleeve.

[0008] The electrode connection tool for the aforementioned LF refining furnace includes a sleeve in the labor-saving bar slot. One end of the sleeve is vertically welded to the outside of a semi-circular ring, and reinforcing ribs are welded to both sides of the sleeve. The central hole of the sleeve matches one end of the labor-saving bar.

[0009] The electrode connection tool for the aforementioned LF refining furnace includes a labor-saving rod comprising a rotating rod and a rotating tube. One end of the rotating rod is fixedly connected to one end of the rotating tube, and the center hole of the sleeve matches the rotating rod. The center hole of the rotating tube matches the rotating handle at the tail end of the sleeve.

[0010] The electrode-connecting tool for the aforementioned LF refining furnace has multiple anti-slip blocks evenly distributed around the electrode fixed on the inner sides of the two semi-circular rings. The anti-slip blocks have anti-slip textures at the parts corresponding to the electrodes of the LF refining furnace.

[0011] The electrode-connecting tool for the aforementioned LF refining furnace has two semi-circular rings made of steel strips.

[0012] The electrode connection tool for the aforementioned LF refining furnace has three to six slots for the effort-saving bar and six anti-slip blocks.

[0013] This invention utilizes a threaded tensioning mechanism to clamp the electrodes of the LF refining furnace between two semicircular rings. It eliminates the need to change tools when the electrode diameter fluctuates significantly, demonstrating exceptional versatility. By inserting a lever into different lever slots to avoid electrode obstruction, it eliminates limitations on lever arm length and provides a larger torsional torque. Using this tool reduces operator workload and improves electrode connection quality and efficiency. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0015] Figure 1 This is a schematic diagram of the use of this utility model, wherein (a) is the state when the sleeve is tightened; and (b) is the state when the electrode is tightened. Figure 2 This is a schematic diagram of the structure of the labor-saving rod; Figure 3 This is a schematic diagram of the electrode clamping device in the closed state; Figure 4 yes Figure 3 View from direction A; Figure 5 yes Figure 3 View from direction B; Figure 6 This is a schematic diagram of the electrode clamping device in the open state.

[0016] The labels in the diagram are as follows: 1. Electrode clamping device; 2. Force-saving rod. 1-1, First semicircular ring; 1-2, Second semicircular ring; 1-3, Hinge shaft; 1-4, Threaded tensioning mechanism; 1-5, Force-saving bar slot; 1-6, Anti-slip block; 1-41, Rotating shaft; 1-42, Connecting stud; 1-43, Sleeve; 1-44, Slot; 1-45, Connecting seat; 1-51, Sleeve; 1-52, Reinforcing Rib; 2-1. Rotating rod; 2-2. Rotating tube. Detailed Implementation

[0017] This utility model addresses the shortcomings of existing technologies by providing a special electrode connection tool for LF refining furnaces. This tool can adapt to the product size deviations of different electrode manufacturers, improve the connection quality and efficiency of LF refining furnace electrodes, reduce electrode detachment accidents, and reduce the labor intensity of employees.

[0018] See Figures 1-6This utility model mainly includes an electrode clamping device 1 and a force-saving rod 2. The two adopt a split structure. The force-saving rod 2 can be flexibly inserted into or separated from the electrode clamping device 1. The size of the force-saving rod 2 can be appropriately increased, which solves the problem that when connecting one phase electrode, the other two phase electrodes hinder the rotation of the long lever arm tool and improves the connection quality of the electrodes.

[0019] The electrode clamping device 1 includes two semicircular rings, namely the first semicircular ring 1-1 and the second semicircular ring 1-2. The first ends of the two semicircular rings are hinged together by the hinge shaft 1-3, and the two semicircular rings can rotate relative to each other about the hinge shaft 1-3. The tail ends of the two semicircular rings are connected by the threaded tensioning mechanism 1-4, so that the two semicircular rings are spliced ​​into a ring. The threaded tensioning mechanism 1-4 includes a rotating shaft 1-41, a connecting stud 1-42, a sleeve 1-43, a groove 1-44, and a connecting seat 1-45. The outer sides of the tail ends of the two semicircular rings are fixed with connecting seats 1-45. The head end of the connecting stud 1-42 is rotatably connected to the connecting seat 1-45 on the outer side of the tail end of the second semicircular ring 1-2 via the rotating shaft 1-41. The connecting seat 1-45 on the outer side of the tail end of the first semicircular ring 1-1 is provided with a groove 1-44 that matches the connecting stud 1-42. The width of the groove 1-44 is greater than the diameter of the connecting stud 1-42 but smaller than the diameter of the sleeve 1-43. The inner wall of the sleeve 1-43 is provided with an internal thread that matches the external thread of the connecting stud 1-42. The head end of the sleeve 1-43 is threadedly engaged with the tail end of the connecting stud 1-42. A rotating handle is installed at the tail end of the sleeve 1-43. The threaded tightening mechanism 1-4 can be tightened or loosened by turning the rotating handle at the end of the sleeve 1-43. Three or more labor-saving rod slots 1-5 are welded to the outer sides of the two semicircular rings. Each labor-saving rod slot 1-5 includes a sleeve 1-51, one end of which is vertically welded to the outer side of the semicircular ring. Reinforcing ribs 1-52 are welded to both sides of the sleeve 1-51 to reinforce it. Three or more anti-slip blocks 1-6 are welded to the inner sides of the two semicircular rings. The labor-saving rod 2 consists of a rotating rod 2-1 and a rotating tube 2-2. One end of the rotating rod 2-1 is welded to one end of the rotating tube 2-2. The diameter of the rotating rod 2-1 is slightly smaller than the inner diameter of the sleeve 1-51; the inner diameter of the rotating tube 2-2 is slightly larger than the diameter of the rotating handle at the end of the sleeve 1-43.

[0020] When using this special tool to clamp the electrode, first place the two semicircular rings on the electrode, then rotate the connecting stud 1-42 into the slot 1-44, and continuously tighten the sleeve 1-43 by rotating the handle, so that the two semicircular rings slowly clamp the electrode. When tightening the sleeve 1-43 is difficult, the rotating tube 2-2 of the labor-saving rod 2 can be placed around the rotating handle at the end of the sleeve 1-43, and the sleeve 1-43 can be tightened by rotating the labor-saving rod 2. The labor-saving effect is achieved by extending the rotation arm. When using this special tool to tighten the electrode, insert the rotating rod 2-1 of the labor-saving rod 2 into the sleeve 1-51, and tighten the electrode by rotating the labor-saving rod 2. The labor-saving effect is achieved by extending the rotation arm. When the labor-saving rod 2 is obstructed by other electrodes, the rotating rod 2-1 of the labor-saving rod 2 can be inserted into another sleeve 1-51 to continue rotating the electrode until the electrode is tightened.

[0021] The two semicircular rings are made of steel strips. Because the steel strips have a certain degree of elasticity, when the diameter of the electrode changes, the shape of the semicircular rings will also change under the tension of the threaded tightening mechanism, so that the inner side of the semicircular rings can always fit with the electrode.

[0022] This utility model has a simple structure, low cost, convenient operation, and wide applicability. It can not only adapt to the size deviation of electrodes from different manufacturers, but also has the advantages of easy operation and reliable electrode connection. It can reduce the labor intensity of operators and reduce the accident of electrode detachment.

Claims

1. A special electrode-connecting tool for an LF refining furnace, characterized in that, The device includes an electrode clamping device (1) and a force-saving rod (2). The electrode clamping device (1) includes two semi-circular rings. The first ends of the two rings are hinged together by a hinge shaft (1-3), and the tail ends are detachably connected by a threaded tensioning mechanism (1-4) so ​​that the two semi-circular rings are spliced ​​into a circular ring and clamp the electrode of the LF refining furnace. Multiple force-saving rod slots (1-5) are fixed on the outside of the circular ring and evenly distributed around the electrode. One end of the force-saving rod (2) is inserted into a force-saving rod slot (1-5) to apply a rotational torque to the electrode clamping device (1).

2. The electrode-connecting tool for an LF refining furnace according to claim 1, characterized in that, The threaded tensioning mechanism (1-4) includes a rotating shaft (1-41), a connecting stud (1-42), and a sleeve (1-43). Connecting seats (1-45) are fixed to the outer sides of the tail ends of both semicircular rings. The head end of the connecting stud (1-42) is rotatably connected to the connecting seat (1-45) on the outer side of the tail end of the second semicircular ring (1-2) via the rotating shaft (1-41). A connecting seat (1-45) on the outer side of the tail end of the first semicircular ring (1-1) is provided with a connecting... A slot (1-44) is provided to match the connecting stud (1-42). The width of the slot (1-44) is greater than the diameter of the connecting stud (1-42) but smaller than the diameter of the sleeve (1-43). The inner wall of the sleeve (1-43) is provided with an internal thread that matches the external thread of the connecting stud (1-42). The first end of the sleeve (1-43) is threadedly engaged with the tail end of the connecting stud (1-42). A rotating handle is installed at the tail end of the sleeve (1-43).

3. The electrode-connecting tool for an LF refining furnace according to claim 2, characterized in that, The labor-saving bar slot (1-5) includes a sleeve (1-51), one end of which is vertically welded to the outside of the semi-circular ring, and reinforcing ribs (1-52) are welded to both sides of the sleeve (1-51). The central hole of the sleeve (1-51) matches one end of the labor-saving bar (2).

4. The electrode-connecting tool for an LF refining furnace according to claim 3, characterized in that, The labor-saving rod (2) includes a rotating rod (2-1) and a rotating tube (2-2). One end of the rotating rod (2-1) is fixedly connected to one end of the rotating tube (2-2). The center hole of the sleeve (1-51) matches the rotating rod (2-1). The center hole of the rotating tube (2-2) matches the rotating handle at the tail end of the sleeve (1-43).

5. A special electrode-connecting tool for an LF refining furnace according to any one of claims 1-4, characterized in that, The inner sides of the two semi-circular rings are fixed with a plurality of anti-slip blocks (1-6) evenly distributed around the electrodes. The anti-slip blocks (1-6) are provided with anti-slip textures at the parts corresponding to the electrodes of the LF refining furnace.

6. The electrode-connecting tool for an LF refining furnace according to claim 5, characterized in that, The two semicircular rings are made of steel strips.

7. A special electrode-connecting tool for an LF refining furnace according to claim 6, characterized in that, The labor-saving bar slot (1-5) and the anti-slip block (1-6) are each provided in three to six pieces.

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