Graphite electrode retrieving device in an electric arc furnace

Abstract

This utility model discloses a graphite electrode retrieval device in an electric arc furnace, comprising a first boom, a second boom, a limiting component, a chain, and a connecting component. The first boom and the second boom are rotatably connected in a cross shape via the connecting component. The limiting component is located between the front ends of the first boom and the front ends of the second boom. The chain is located at the ends of both the first boom and the second boom. The first boom includes a first arc hook and a first connecting arm, the first arc hook and the first connecting arm being integrally formed, with a first connecting hole at the connection point. The second boom includes a second arc hook and a second connecting arm, the second arc hook and the second connecting arm being integrally formed, with a second connecting hole at the connection point. This utility model has a simple overall structure and can achieve automatic closure, effectively avoiding the technical problem of the retrieval device failing to open after being suspended in molten steel, thereby effectively improving retrieval efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of graphite electrode retrieval technology, and in particular relates to a graphite electrode retrieval device in an electric arc furnace. Background Technology

[0002] In electric arc furnace smelting, three graphite electrodes are typically used as conductive heating elements. The furnace temperature is raised through the electric arc effect generated between the electrodes and the scrap steel. Due to factors such as electrode material properties, process operation, and the stability of the high-voltage power supply equipment, occasional graphite electrode breakage accidents occur during smelting. The broken electrodes fall onto the surface of the molten steel in the furnace. If not retrieved promptly, this not only delays the smelting cycle and disrupts production, but also causes the broken electrodes to melt after prolonged immersion in the molten steel, leading to an abnormally high carbon content in the steel and severely impacting product quality. Utility Model Content

[0003] To address some or all of the technical problems existing in the prior art, this utility model provides a graphite electrode retrieval device for an electric arc furnace, comprising a first boom, a second boom, a limiting component, a chain, and a connecting component. The first boom and the second boom are rotatably connected in a cross shape via the connecting component. The limiting component is disposed between the front ends of the first boom and the second boom to limit the distance between the first boom and the second boom. The chain is disposed at the ends of the first boom and the second boom, respectively. The first boom includes a first arc hook and a first connecting arm. The first arc hook and the first connecting arm are integrally formed, and a first connecting hole is provided at the connection between the first arc hook and the first connecting arm. The second boom includes a second arc hook and a second connecting arm. The second arc hook and the second connecting arm are integrally formed, and a second connecting hole is provided at the connection between the second arc hook and the second connecting arm.

[0004] Furthermore, in the graphite electrode retrieval device in the electric arc furnace described above, the first arc hook and the second arc hook are semi-circular arcs. The top of the first arc hook is collinear with the outer side of the first connecting arm, and the top of the second arc hook is collinear with the outer side of the second connecting arm. The first arc hook and the second arc hook form a circle after closing.

[0005] Furthermore, in the above-mentioned graphite electrode retrieval device in an electric arc furnace, the limiting component includes a rotating shaft, a rotating rod, and a limiting shaft. The rotating shaft is welded to one end of the rotating rod, and the limiting shaft is welded to the other end of the rotating rod. The top of the first arc hook has an installation hole, and the top of the second arc hook has a limiting groove. The rotating shaft is rotatably installed in the installation hole, and the limiting shaft is slidably disposed in the limiting groove. The rotating rod has an arc-shaped structure.

[0006] Furthermore, in the above-mentioned graphite electrode retrieval device in the electric arc furnace, the connecting assembly includes a connecting pin, a fixing bolt, and a positioning rod. The connecting pin passes through the first connecting hole and the second connecting hole in sequence and engages with the fixing bolt by threads. The positioning rod is arranged in an L-shape, with one end of the positioning rod welded to the end of the connecting pin and the other end of the positioning rod positioned between the angle between the first connecting arm and the second connecting arm.

[0007] Furthermore, in the graphite electrode retrieval device in the above-mentioned electric arc furnace, the chain is welded to the ends of the first connecting arm and the second connecting arm, respectively.

[0008] The graphite electrode retrieval device for electric arc furnace of this invention has the following advantages and beneficial effects: The overall structure is simple. The first and second booms are connected in a cross shape by a connecting component, which effectively ensures that the first and second booms can automatically close when they are lifted. The setting of the limit component ensures that the first and second booms are always in the open and closed state when the electrode is not being grabbed, which effectively avoids the technical problem that the retrieval device cannot open after being suspended into the molten steel, thus effectively improving the retrieval efficiency. Attached Figure Description

[0009] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only for further understanding of the embodiments of the present invention and constitute a part of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. In the drawings: Figure 1 This is a three-dimensional structural diagram of the graphite electrode retrieval device inside the electric arc furnace according to this utility model.

[0010] Explanation of reference numerals in the attached figures: 1: First boom; 11: First hook; 111: Mounting hole; 12: First connecting boom; 13: First connecting hole; 2: Second boom; 21: Second hook; 211: Limiting groove; 22: Second connecting arm; 23: Second connecting hole; 3: Limiting component; 31: Rotating shaft; 32: Rotating rod; 33: Limiting shaft; 4: Chain; 5: Connecting component; 51: Connecting pin; 52: Fixing bolt; 53: Positioning rod. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below in conjunction with specific embodiments and corresponding drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.

[0012] like Figure 1 As shown, the graphite electrode retrieval device for an electric arc furnace of this utility model includes a first lifting arm 1, a second lifting arm 2, a limiting component 3, a chain 4, and a connecting component 5. The first lifting arm 1 and the second lifting arm 2 are rotatably connected in a cross shape through the connecting component 5. The limiting component 3 is located between the front end of the first lifting arm 1 and the front end of the second lifting arm 2 to limit the distance between the first lifting arm 1 and the second lifting arm 2. The chain 4 is respectively located at the ends of the first lifting arm 1 and the second lifting arm 2, wherein: The first boom 1 includes a first arc hook 11 and a first connecting arm 12. The first arc hook 11 and the first connecting arm 12 are integrally formed. A first connecting hole 13 is provided at the connection between the first arc hook 11 and the first connecting arm 12. The second boom 2 includes a second arc hook 21 and a second connecting arm 22. The second arc hook 21 and the second connecting arm 22 are integrally formed, and a second connecting hole 23 is provided at the connection between the second arc hook 21 and the second connecting arm 22.

[0013] Furthermore, in the graphite electrode retrieval device in the electric arc furnace described above, the first arc hook 11 and the second arc hook 21 are semi-circular arcs. The top of the first arc hook 11 is collinear with the outer side of the first connecting arm 12, and the top of the second arc hook 21 is collinear with the outer side of the second connecting arm 22. After the first arc hook 11 and the second arc hook 21 are closed, they form a circle, so that when the first boom 1 and the second boom 2 are lifted by the chain 4, the first arc hook 11 and the second arc hook 21 are rotated and closed by gravity through the connecting device.

[0014] Preferably, the diameter of the circle formed by the first arc hook 11 and the second arc hook 21 after they are closed is less than or equal to the diameter of the electrode.

[0015] Furthermore, in the graphite electrode retrieval device in the above-mentioned electric arc furnace, the limiting component 3 includes a rotating shaft 31, a rotating rod 32, and a limiting shaft 33. The rotating shaft 31 is welded to one end of the rotating rod 32, and the limiting shaft 33 is welded to the other end of the rotating rod 32. The top of the first arc hook 11 is provided with an installation hole 111, and the top of the second arc hook 21 is provided with a limiting groove 211. The rotating shaft 31 is rotatably installed in the installation hole 111, and the limiting shaft 33 is slidably arranged in the limiting groove 211. The rotating rod 32 is arranged in an arc shape, so that when the first boom 1 and the second boom 2 enter the molten steel, the first arc hook 11 and the second arc hook 21 can be in an open and closed state. When the limiting shaft 33 is pulled upward after contacting the graphite electrode, it disengages from the limiting groove 211, and the first arc hook 11 and the second arc hook 21 can be closed under the influence of gravity.

[0016] Furthermore, in the graphite electrode retrieval device in the electric arc furnace described above, the connecting component 5 includes a connecting pin 51, a fixing bolt 52, and a positioning rod 53. The connecting pin 51 passes through the first connecting hole 13 and the second connecting hole 23 in sequence and engages with the fixing bolt 52 by thread. The positioning rod 53 is arranged in an L-shape. One end of the positioning rod 53 is welded to the end of the connecting pin 51, and the other end of the positioning rod 53 is located between the angle between the first connecting arm 12 and the second connecting arm 22. Thus, the first boom 1 and the second boom 2 can achieve closed rotation through the connecting pin 51. The setting of the positioning rod 53 effectively avoids the first boom 1 and the second boom 2 from being over-closed, thus preventing the electrode from flipping over and falling again after retrieval.

[0017] Preferably, after the first arc hook 11 and the second arc hook 21 are closed, the included angle between the first connecting arm 12 and the second connecting arm 22 is controlled between 35° and 25°. Therefore, when the first connecting arm 12 and the second connecting arm 22 abut against the positioning rod 53, the included angle between the first connecting arm 12 and the second connecting arm 22 is 25°. Furthermore, in the graphite electrode retrieval device in the electric arc furnace described above, the chain 4 is welded to the end of the first connecting arm 12 and the end of the second connecting arm 22, respectively, so as to facilitate connection with the overhead crane hook.

[0018] Specifically, during the electrode retrieval operation, the first boom 1 and the second boom 2 are first opened, so that the distance between the first arc hook 11 and the second arc hook 21 is greater than the electrode diameter. At this time, the rotating shaft 31 is rotated within the mounting hole 111 by rotating the rotating rod 32 until the limiting shaft 33 is engaged in the limiting groove 211. Then, the chain 4 is connected to the overhead crane hook, and the overhead crane is controlled to send the first boom 1 and the second boom 2 into the electric arc furnace, and move closer to the electrode on the surface of the molten steel until the electrode is between the first arc hook 11 and the second arc hook 21. At this time, the overhead crane is controlled to drive the first boom 1 and the second boom 2 through the chain 4. As boom 1 and boom 2 rise, the electrode first presses against the arc surface of the rotating rod 32 during the ascent because the rotating rod 32 is arc-shaped. The rotating rod 32 rotates outward, causing the limiting shaft 33 to disengage from the limiting groove 211. At the same time, the first boom 1 and boom 2 are affected by gravity and chain 4, and the angle between the first connecting arm 12 and the second connecting arm 22 decreases. This causes the first arc hook 11 and the second arc hook 21 to close and clamp the electrode. When the angle between the first connecting arm 12 and the second connecting arm decreases, the positioning rod 53 limits its movement to prevent excessive rotation.

[0019] In summary, compared with the prior art, the graphite electrode retrieval device for electric arc furnace of this utility model has the following advantages and beneficial effects: The overall structure is simple. The first and second booms are connected in a cross shape by a connecting component, which effectively ensures that the first and second booms can automatically close when they are lifted. The setting of the limit component ensures that the first and second booms are always in the open and closed state when the electrode is not being grabbed, which effectively avoids the technical problem that the retrieval device cannot open after being suspended into the molten steel, thus effectively improving the retrieval efficiency.

[0020] It should be noted that, unless otherwise expressly specified and limited, the term "connection" or its synonyms should be interpreted broadly in this document. For example, "connection" can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be the internal communication of two elements or the interaction between two elements. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances. Furthermore, expressions such as "first" and "second" are merely used to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Meanwhile, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. In addition, the terms "front," "rear," "left," "right," "upper," and "lower" in this document refer to the placement states shown in the accompanying drawings.

[0021] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A device for retrieving graphite electrodes from an electric arc furnace, characterized in that, The graphite electrode retrieval device inside the electric arc furnace includes a first boom, a second boom, a limiting component, a chain, and a connecting component. The first boom and the second boom are rotatably connected in a cross shape via the connecting component. The limiting component is disposed between the front ends of the first boom and the second boom to limit the distance between the first boom and the second boom. The chain is disposed at the ends of the first boom and the second boom, respectively. The first boom includes a first arc hook and a first connecting arm. The first arc hook and the first connecting arm are integrally formed, and a first connecting hole is provided at the connection between the first arc hook and the first connecting arm. The second boom includes a second arc hook and a second connecting arm. The second arc hook and the second connecting arm are integrally formed, and a second connecting hole is provided at the connection between the second arc hook and the second connecting arm.

2. The graphite electrode retrieval device in an electric arc furnace according to claim 1, characterized in that, The first arc hook and the second arc hook are semi-circular arcs. The top of the first arc hook is collinear with the outer side of the first connecting arm, and the top of the second arc hook is collinear with the outer side of the second connecting arm. When the first arc hook and the second arc hook are closed, they form a circle.

3. The graphite electrode retrieval device in an electric arc furnace according to claim 1, characterized in that, The limiting component includes a rotating shaft, a rotating rod, and a limiting shaft. The rotating shaft is welded to one end of the rotating rod, and the limiting shaft is welded to the other end of the rotating rod. The top of the first arc hook has a mounting hole, and the top of the second arc hook has a limiting groove. The rotating shaft is rotatably installed in the mounting hole, and the limiting shaft is slidably disposed in the limiting groove. The rotating rod has an arc-shaped structure.

4. The graphite electrode retrieval device in an electric arc furnace according to claim 1, characterized in that, The connecting assembly includes a connecting pin, a fixing bolt, and a positioning rod. The connecting pin passes through the first connecting hole and the second connecting hole in sequence and engages with the fixing bolt by threads. The positioning rod is arranged in an L-shape. One end of the positioning rod is welded to the end of the connecting pin, and the other end of the positioning rod is located between the angle between the first connecting arm and the second connecting arm.

5. The graphite electrode retrieval device in an electric arc furnace according to claim 1, characterized in that, The chain is welded to the ends of the first connecting arm and the second connecting arm, respectively.

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