Fishing device for electric arc furnace and refining furnace electrode falling into steel ladle

Abstract

The utility model discloses a fishing device for electric arc furnace and refining furnace electrodes falling into a steel ladle, belongs to the technical field of electric arc furnace and refining furnace maintenance tools, and is used for fishing the electric arc furnace and refining furnace electrodes falling into the steel ladle. According to the technical scheme, the upper portions of hanging rods are straight rods, the lower portions of the hanging rods are provided with clamps, the clamps are triangularly bent, the two hanging rods are arranged at the lower ends of the straight rods in a crossed and overlapped mode, and concave faces of the triangularly bent clamps on the lower portions of the two hanging rods are opposite. The rotating bolt penetrates through the shaft holes in the lower ends of the straight rods of the two hanging rods and is connected with the screw hole in one side of the sleeve in a screwed mode, the shaft holes in the lower ends of the straight rods of the two hanging rods are in rotating fit with the rotating bolt, the ejector rod is placed in the sleeve and is in sliding fit with the sleeve, and the lower end of the ejector rod is opposite to a cavity between the concave faces of the clamps on the lower portions of the two hanging rods. The electrode fishing device is simple in structure and convenient to use, the electrode can be fished out in time after falling, the situation that the quality of molten steel exceeds the standard and safety accidents are caused due to electrode melting is avoided, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to a salvaging device for electrodes dropped into a ladle of an electric arc furnace or a refining furnace, belonging to the technical field of maintenance tools for electric arc furnaces and refining furnaces. Background Art

[0002] Electric arc furnaces and refining furnaces utilize the thermal effect of an electric arc to heat the charge for melting. Alternating current is fed into the furnace through three graphite electrodes, generating an arc between the lower ends of the electrodes and the metal charge. The high temperature of the arc directly heats the charge, enabling the steelmaking process. Electric arc furnaces use electricity as a heat source, avoiding sulfur contamination from gaseous heat sources. They offer flexible operation, allowing both slag and furnace gases to be controlled to either oxidizing or reducing properties. The strong reducing properties minimize the loss of valuable elements such as chromium, nickel, tungsten, molybdenum, vanadium, and titanium contained in the charge. The furnace temperature is high, easily controlled, and the product quality is high.

[0003] However, during the production process, electrodes may fall into the ladle. Currently, the method for dealing with dropped electrodes in electric arc furnaces and refining furnaces is to dump the molten steel from the ladle and then remove the dropped electrodes. However, this method can easily cause the electrodes to melt if not removed in time, resulting in excessive molten steel quality and waste. In addition, the molten steel can easily splash during the dumping process, which can also cause safety accidents. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a salvage device for electrodes dropped into the ladle of an electric arc furnace or a refining furnace. The salvage device can promptly salvage the electrodes after they have fallen, thereby avoiding excessive steel quality and safety accidents caused by untreated electrodes, thereby reducing production costs, improving production efficiency and product quality, and effectively preventing safety accidents.

[0005] The technical solution to the above technical problems is:

[0006] A salvage device for electrodes dropped into a ladle in an electric arc furnace or a refining furnace comprises a lifting ring, a lifting chain, a lifting rod, a sleeve, a rotating bolt, and a mandrel. The lifting ring is an elliptical ring connected to the upper ends of two lifting chains, the lower ends of the two lifting chains are respectively connected to the upper ends of two lifting rods, the upper part of the lifting rod is a straight rod, the lower part of the lifting rod is a clamp, the clamp is triangularly bent, the two lifting rods respectively have an axial hole at the lower end of the straight rod, the two lifting rods are cross-over and overlapped at the lower end of the straight rod, and the concave surfaces of the triangular bends of the clamps at the lower parts of the two lifting rods face each other. The sleeve is placed vertically on the outside of the intersection of the two hangers. There is a screw hole on one side of the sleeve. The screw hole of the sleeve is opposite to the axial hole at the lower end of the straight rods of the two hangers. The rotating bolt passes through the axial hole at the lower end of the straight rods of the two hangers and is tightened with the screw hole on one side of the sleeve. The axial hole at the lower end of the straight rods of the two hangers is rotationally matched with the rotating bolt. The push rod is a round rod. The push rod is placed in the sleeve. The diameter of the push rod matches the inner hole diameter of the sleeve. The push rod and the sleeve are slidingly matched. The lower end of the push rod is opposite to the cavity between the concave surfaces of the clamps at the lower part of the two hangers.

[0007] The above-mentioned salvage device for electrodes dropped into the ladle of an electric arc furnace and a refining furnace also has a cross bar, which is located between the middle parts of the straight bars of the two booms. The cross bar is in a horizontal position. One end of the cross bar is connected to one boom through a rotating shaft. The other end of the cross bar has a slot, and the opening of the slot faces downward. A pin is fixed on the rod body of the other boom. The slot opening of the cross bar is clamped on the pin, and the slot and the pin are in sliding fit. The upper end of the top rod is connected to the middle part of the cross bar by the top shaft.

[0008] The beneficial effects of the utility model are:

[0009] The lower parts of the two booms of the utility model are placed crosswise and overlapping, and the two booms are respectively connected to the casing at the intersection by rotating bolts. The two booms can rotate around the rotating bolts to realize the opening and closing of the clamps at the lower ends of the booms; the cross bar is connected to the middle of the upper parts of the two booms, and the cross bar is rotatably connected to the upper end of the mandrel, and the lower end of the mandrel passes through the casing and is located between the clamps of the two booms. When the lower end of the mandrel is pressed against the electrode, the upper end of the mandrel pushes the cross bar upward, and the two booms rotate and close around the rotating bolts of the casing, and the two clamps at the lower parts of the booms merge toward the middle to clamp the electrode; the overhead crane lifts the booms through the lifting rings and lifting chains to complete the action of salvaging the electrode.

[0010] The utility model has a simple structure and is easy to use. After the electrode falls, it can be fished out in time to avoid excessive steel quality and safety accidents caused by electrode melting, thereby reducing production costs, improving production efficiency and product quality, and effectively preventing safety accidents. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural diagram of the utility model;

[0012] Figure 2It is a side view of the figure;

[0013] Figure 3 It is a schematic diagram of the working state of the utility model.

[0014] The markings in the figure are as follows: lifting ring 1, lifting chain 2, lifting rod 3, sleeve 4, rotating bolt 5, push rod 6, cross bar 7, straight rod 8, clamp 9, rotating shaft 10, slot 11, pin 12, push shaft 13, electrode 14. DETAILED DESCRIPTION

[0015] The utility model is composed of a lifting ring 1, a lifting chain 2, a lifting rod 3, a sleeve 4, a rotating bolt 5, a top rod 6 and a cross rod 7.

[0016] Figure 1 、 2 It is shown that the lifting ring 1 is an elliptical ring, which is connected to the upper ends of two lifting chains 2. The lower ends of the two lifting chains 2 are respectively connected to the upper ends of two suspension rods 3. The overhead crane lifts the suspension rods 3 through the lifting ring 1 and the lifting chains 2.

[0017] Figure 1 、 2 The upper portion of the suspension rod 3 is shown as a straight rod 8, and the lower portion of the suspension rod 3 is a clamp 9, which is triangularly bent. The two suspension rods 3 each have an axial hole at the lower end of the straight rod 8. The two suspension rods 3 are placed crosswise and overlapping at the lower end of the straight rod 8, with the concave surfaces of the triangular bends of the clamps 9 at the lower ends of the two suspension rods 3 facing each other.

[0018] Figure 1 、 2 As shown, the two suspension rods 3 are not connected by a conventional rotating shaft at the intersection and overlap, but are connected by a sleeve 4 with a top rod 6 placed inside. The sleeve 4 is placed vertically on the outside of the intersection of the two suspension rods 3. The sleeve 4 has a screw hole on the side opposite the suspension rods 3. The screw hole of the sleeve 4 is opposite the axial hole at the lower end of the straight rod 8 of the two suspension rods 3. The rotating bolt 5 passes through the axial hole at the lower end of the straight rod 8 of the two suspension rods 3 and is tightened with the screw hole on one side of the sleeve 4. The axial hole at the lower end of the straight rod 8 of the two suspension rods 3 and the rotating bolt 5 are in rotational cooperation, and the two suspension rods 3 can be rotated by rotating the bolt 5.

[0019] Figure 1 、 2 The figure shows a round push rod 6 placed within the casing 4. Its diameter matches the inner diameter of the casing 4, forming a sliding fit. The lower end of the push rod 6 faces the cavity between the concave surfaces of the clamps 9 at the bottom of the two suspension rods 3. A circular disc is welded to the lower end of the push rod 6, which is used to contact the upper end of the electrode 14 dropped into the electric furnace.

[0020] Figure 1 、 2It is shown that a cross bar 7 is connected to the upper end of the top rod 6, and the cross bar 7 serves to open the two suspension rods 3 and the clamp 9. The cross bar 7 is located between the middle parts of the straight rods 8 of the two suspension rods 3, and the cross bar 7 is in a horizontal position. One end of the cross bar 7 is connected to one suspension rod 3 through a rotating shaft 10. The other end of the cross bar 7 has a slot 11, and the opening of the slot 11 is downward. A pin 12 is fixed to the rod body of the other suspension rod 3. The slot opening of the cross bar 7 is stuck on the pin 12, and the slot 11 and the pin 12 are in a sliding fit. The upper end of the top rod 6 is connected to the middle part of the cross bar 7 by a top shaft 13. The top rod 6 can push the cross bar 7 upward through the top shaft 13, causing the cross bar 7 to rotate around the rotating shaft 10, thereby losing the function of supporting the two suspension rods 3 to open.

[0021] Figure 3 It is shown that when the present invention is in use, the slot 11 of the crossbar 7 is clamped on the pin 12 of one side of the suspension rod 3, so that the straight rods 8 at the upper parts of the two suspension rods 3 are in a separated state, and at the same time, the clamps 9 at the lower parts of the two suspension rods 3 are also opened relative to each other, and the upper end of the top rod 6 is connected to the middle part of the horizontal crossbar 7, and the top rod 6 is in its lowest position;

[0022] The overhead crane lifts the suspension rods 3 through the suspension rings 2 and the suspension chains 3, and places the two suspension rods 3 into the furnace body of the electric furnace. When the clamps 9 at the bottom of the two suspension rods 3 touch the electrode 14, the two suspension rods 3 are moved so that the clamps 9 at the bottom of the two suspension rods 3 are respectively on both sides of the electrode 14;

[0023] Then, the boom 3 is lowered, and the lower end of the push rod 6 between the two clamps 9 is pressed against the electrode 14. The boom 3 is further lowered, and the push rod 6 moves upward along the sleeve 4 on one side of the boom 3. When the push rod 6 moves upward, the upper end of the push rod 6 pushes the cross bar 7 upward, and the slot 11 at one end of the cross bar 7 disengages from the pin 12, so that the cross bar 7 rotates around the rotating shaft 10 at the other end. The cross bar 7 loses its opening effect on the two booms 3, and the two booms 3 rotate and close around the rotating bolt 5 of the sleeve 4, so that the two clamps 9 at the lower part of the boom 3 merge toward the middle and clamp the electrode 14.

[0024] The overhead crane hoists the boom 3 through the hoist ring 1 and the hoist chain 2 to complete the action of salvaging the electrode 14 .

[0025] An embodiment of the present invention is as follows:

[0026] The diameter of the boom 3 is 50 mm, the length of the straight rod 8 is 1000 mm, and the length of the clamp 9 is 750 mm;

[0027] The length of the sleeve 4 is 75 mm, the outer diameter is 50 mm, the inner diameter is 22 mm, and the diameter of the side screw hole is 22 mm;

[0028] The diameter of the rotating bolt 5 is 16 mm and the length is 80 mm;

[0029] The length of the top rod 6 is 770 mm and the diameter is 20 mm;

[0030] The crossbar 7 has a diameter of 20 mm and a length of 550 mm, the rotating shaft 10 has a diameter of 10 mm, the slot 11 has a length of 20 mm, the pin 12 has a diameter of 10 mm, and the top shaft 13 has a diameter of 10 mm.

Claims

1. A salvage device for electrodes dropped into a ladle in an electric arc furnace or a refining furnace, characterized by: It comprises a lifting ring (1), a lifting chain (2), a lifting rod (3), a sleeve (4), a rotating bolt (5), and a top rod (6). The lifting ring (1) is an elliptical ring. The lifting ring (1) is connected to the upper ends of the two lifting chains (2). The lower ends of the two lifting chains (2) are respectively connected to the upper ends of the two lifting rods (3). The upper part of the lifting rod (3) is a straight rod (8). The lower part of the lifting rod (3) is a clamp (9). The clamp (9) is triangularly bent. The two lifting rods (3) have axial holes at the lower ends of the straight rod (8). The two lifting rods (3) are placed crosswise and overlapped at the lower ends of the straight rod (8). The concave surfaces of the triangular bends of the clamps (9) at the lower parts of the two lifting rods (3) are opposite. The sleeve (4) is vertically placed between the two lifting rods. On the outside of the intersection of the rod (3), one side of the sleeve (4) has a screw hole, and the screw hole of the sleeve (4) is opposite to the axial hole at the lower end of the straight rod (8) of the two suspenders (3). The rotating bolt (5) passes through the axial hole at the lower end of the straight rod (8) of the two suspenders (3) and is tightened with the screw hole on one side of the sleeve (4). The axial hole at the lower end of the straight rod (8) of the two suspenders (3) and the rotating bolt (5) are in rotational cooperation. The top rod (6) is a round rod. The top rod (6) is placed in the sleeve (4). The diameter of the top rod (6) matches the inner hole diameter of the sleeve (4). The top rod (6) and the sleeve (4) are in sliding cooperation. The lower end of the top rod (6) is opposite to the cavity between the concave surfaces of the clamp (9) at the lower part of the two suspenders (3).

2. The salvage device for arc furnace and refining furnace electrodes dropped into the ladle according to claim 1, characterized in that: It also has a cross bar (7), which is located between the middle parts of the straight bars (8) of the two suspension bars (3). The cross bar (7) is in a horizontal position. One end of the cross bar (7) is connected to one suspension bar (3) through a rotating shaft (10). The other end of the cross bar (7) has a slot (11). The opening of the slot (11) faces downward. A pin (12) is fixed on the rod body of the other suspension bar (3). The slot opening of the cross bar (7) is stuck on the pin (12). The slot (11) and the pin (12) are in sliding cooperation. The upper end of the top bar (6) is rotatably connected to the middle part of the cross bar (7) by the top shaft (13).

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