A dummy electrode clamp for a bipolar series electroslag furnace

Abstract

This utility model relates to a dummy electrode clamp for a bipolar series electroslag furnace, belonging to the technical field of electroslag furnace equipment in the metallurgical industry. The technical solution includes an arc-shaped clamp A (1), a pin (2), an arc-shaped clamp B (3), a bolt (4), a nut (5), a washer (6), and an asbestos fiber felt (7). The arc-shaped clamp A (1) and the arc-shaped clamp B (3) are both semi-circular and cooperate with the dummy electrode (12). One side of the arc-shaped clamp A (1) and the arc-shaped clamp B (3) are rotatably connected together, and the other side of the arc-shaped clamp A (1) and the arc-shaped clamp B (3) are connected together by bolts (4), nuts (5), and washers (6). The inner side of the arc-shaped clamp A (1) and the arc-shaped clamp B (3) is provided with asbestos fiber felt (7) wrapped around the dummy electrode (12). The beneficial effect of this utility model is that it can ensure a safe distance between the electrode and the crystallizer wall, thereby achieving reasonable selection of electrode size and reducing energy consumption.

Description

Technical Field

[0001] This utility model relates to a dummy electrode clamp for a bipolar series electroslag furnace, belonging to the technical field of electroslag furnace equipment in the metallurgical industry. Background Technology

[0002] Electroslag remelting (ESR) furnaces are specialized metallurgical equipment, which can be classified into single-pole ESR furnaces, bipolar series ESR furnaces, and multi-pole ESR furnaces based on their electrode structure. Bipolar series ESR furnaces use two parallel electrodes connected in series, forming a circuit with a transformer and a short-circuit network. They offer advantages such as low network reactance, high thermal efficiency, fast melting speed, and low energy consumption, and are widely used.

[0003] The electrodes of a bipolar series electroslag remelting furnace are welded together from dummy electrodes and metal electrodes, typically 3-4 meters long. The electrode arms clamp the upper part of the dummy electrode, while the lower part of the metal electrode is immersed in the slag pool of the electroslag remelting furnace for melting. During the melting process, influenced by the electromagnetic force of the bipolar series circuit, the two parallel electrodes generate repulsive forces and open outwards. The longer the electrode, the wider the opening at the bottom. When the opening width of the two electrodes is large, the distance between the electrode and the crystallizer wall decreases. In severe cases, contact with the crystallizer wall can cause short circuits, damaging the crystallizer and causing safety accidents. Reducing the electrode size can increase the safe distance between the electrode and the crystallizer wall during smelting, but this results in a lower fill ratio and increased energy consumption. Therefore, without sacrificing economic indicators, safely and effectively controlling the safe distance between the electrode and the crystallizer wall during the smelting process in a bipolar series electroslag remelting furnace, and reducing potential safety hazards, is of great significance. Utility Model Content

[0004] The purpose of this invention is to provide a dummy electrode fixture for a bipolar series electroslag furnace, which can ensure a safe distance between the electrode and the crystallizer wall, thereby enabling the rational selection of electrode size, reducing energy consumption, and solving the problems existing in the background technology.

[0005] The technical solution of this utility model is: A dummy electrode clamp for a bipolar series electroslag furnace includes an arc-shaped clamp A, a pin, an arc-shaped clamp B, bolts, nuts, washers, and asbestos fiber felt. The arc-shaped clamp A and the arc-shaped clamp B are both semi-circular and cooperate with the dummy electrode. One side of the arc-shaped clamp A and the arc-shaped clamp B are rotatably connected together by the pin, and the other side of the arc-shaped clamp A and the arc-shaped clamp B are connected together by bolts, nuts, and washers. The inner side of the arc-shaped clamp A and the arc-shaped clamp B is provided with asbestos fiber felt wrapped around the dummy electrode.

[0006] The arc-shaped clamping plate A and the arc-shaped clamping plate B are respectively provided with pin holes on one side to cooperate with the pin shaft. The pin hole A of the arc-shaped clamping plate A is located in the middle of the height direction of the arc-shaped clamping plate A, and the pin hole B of the arc-shaped clamping plate B is located in the upper middle and lower middle parts of the arc-shaped clamping plate B.

[0007] The lengths of the pin holes on one side of the arc-shaped clamping plate A and the arc-shaped clamping plate B that mate with the pin shaft are one-third of the heights of the arc-shaped clamping plate A and the arc-shaped clamping plate B, respectively.

[0008] The other side of the arc-shaped clamp A and arc-shaped clamp B extends radially outward to form a connecting plate, and the connecting plate has two bolt holes arranged vertically to cooperate with the bolts.

[0009] The arc-shaped clamping plate A and arc-shaped clamping plate B are respectively welded to the connecting plate with stiffening plates.

[0010] The beneficial effects of this invention are: it can constrain the opening angle of the two electrodes during the melting process of a bipolar series electroslag furnace, ensuring a safe distance between the electrodes and the crystallizer wall, and preventing excessive opening width of the lower parts of the two electrodes due to electromagnetic force, which could lead to short circuits, damage to the crystallizer, and safety accidents. It has a simple structure, is easy to use, ensures reasonable electrode dimensions and normal economic indicators, achieves stable and safe production, and is safe and reliable in use. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure and installation of this utility model; In the diagram: Arc-shaped clamp A1, pin 2, arc-shaped clamp B3, bolt 4, nut 5, washer 6, asbestos fiber felt 7, connecting plate 8, stiffening plate 9, pin hole A10, pin hole B11, dummy electrode 12. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and examples.

[0013] See attached document Figure 1 A dummy electrode clamp for a bipolar series electroslag furnace includes an arc-shaped clamp A1, a pin 2, an arc-shaped clamp B3, a bolt 4, a nut 5, a washer 6, and an asbestos fiber felt 7. The arc-shaped clamp A1 and the arc-shaped clamp B3 are both semi-circular and cooperate with the dummy electrode 12. One side of the arc-shaped clamp A1 and the arc-shaped clamp B3 are rotatably connected together by the pin 2, and the other side of the arc-shaped clamp A1 and the arc-shaped clamp B3 are connected together by the bolt 4, the nut 5, and the washer 6. The inner side of the arc-shaped clamp A1 and the arc-shaped clamp B3 is provided with an asbestos fiber felt 7 wrapped around the dummy electrode 12.

[0014] In this embodiment, refer to the appendix Figure 1 The fixture is assembled at the lower part of the dummy electrode 12 for fixing the dummy electrode 12 during the bipolar series electroslag furnace production process. It includes an arc-shaped clamp A1, a pin 2, an arc-shaped clamp B3, a bolt 4, a nut 5, a washer 6, an asbestos fiber felt 7, a connecting plate 8, a reinforcing plate 9, a pin hole A10, and a pin hole B11, wherein: The arc radius of the arc-shaped clamps A1 and B3 is 5mm larger than that of the dummy electrode 12, which is sufficient to hold the dummy electrode 12 in place. The arc-shaped clamps A1 and B3 are made of 5mm thick ordinary steel plate, are 100mm high, and are lightweight, making them easy to assemble.

[0015] Arc-shaped clamping plates A1 and B3 extend 50mm outward along one side in the radial direction to serve as connecting plates 8. Two bolt holes are arranged longitudinally on the connecting plates 8, and a reinforcing plate 9 is welded between the two bolt holes to improve the strength of the steel plate and prevent the steel plate from deforming when the connecting bolts are tightened.

[0016] Pin holes are welded to the other side of the arc-shaped clamping plate A1 and the arc-shaped clamping plate B3 respectively. The pin hole A10 of the arc-shaped clamping plate A1 is located in the middle of the height direction of the arc-shaped clamping plate A1 and its length is 1 / 3 of the height of the arc-shaped clamping plate A1. The pin hole B11 of the arc-shaped clamping plate B3 is located in the upper middle and lower middle parts of the height direction of the arc-shaped clamping plate B3 and its length is 1 / 3 of the height of the arc-shaped clamping plate B3 respectively.

[0017] The asbestos fiber felt 7 is about 160mm high and 10mm thick. During installation, about 30mm of the upper and lower edges of the arc-shaped clamp A1 and arc-shaped clamp B3 are exposed, completely covering the entire circumference of the dummy electrode to ensure reliable and safe isolation between the arc-shaped clamp A1 and arc-shaped clamp B3 and the dummy electrode.

[0018] One side of the arc-shaped clamps A1 and B3 is connected by a pin 2, allowing them to rotate and open. Asbestos fiber felt 7 wraps around the dummy electrode 12, providing insulation between the dummy electrode 12 and the arc-shaped clamps A1 and B3, preventing direct contact and electrical connection. The other end of the arc-shaped clamps A1 and B3 is secured by two sets of bolts 4, nuts 5, and washers 6, tightening them to prevent the two electrodes from opening outwards due to electromagnetic force.

[0019] In use, after the dummy electrode with welded metal electrodes is installed on the electrode clamping arm of the bipolar series electroslag furnace, first wrap the lower part of the dummy electrode 12 with asbestos fiber felt 7, then install the arc-shaped clamping plate A1 and arc-shaped clamping plate B3 to clamp the asbestos fiber felt 7, and connect them with fasteners such as bolts 4, nuts 5 and washers 6. Tighten the nuts 5 with a wrench to fix and clamp the dummy electrode. The whole process is convenient, safe and reliable.

Claims

1. A dummy electrode clamp for a bipolar series electric-shock furnace, characterized by: It includes an arc-shaped clamp A (1), a pin (2), an arc-shaped clamp B (3), a bolt (4), a nut (5), a washer (6), and an asbestos fiber felt (7). The arc-shaped clamp A (1) and the arc-shaped clamp B (3) are both semi-circular and cooperate with the dummy electrode (12). One side of the arc-shaped clamp A (1) and the arc-shaped clamp B (3) are rotatably connected together by the pin (2), and the other side of the arc-shaped clamp A (1) and the arc-shaped clamp B (3) are connected together by the bolt (4), the nut (5), and the washer (6). The inner side of the arc-shaped clamp A (1) and the arc-shaped clamp B (3) is provided with an asbestos fiber felt (7) wrapped around the dummy electrode (12).

2. A dummy electrode clamp for a bipolar series electric-shock furnace according to claim 1, characterized in that: The arc-shaped clamp A (1) and arc-shaped clamp B (3) are respectively provided with pin holes that cooperate with pins (2) on one side. The pin hole A (10) of the arc-shaped clamp A (1) is located in the middle of the height direction of the arc-shaped clamp A (1), and the pin hole B (11) of the arc-shaped clamp B (3) is located in the upper middle and lower middle parts of the arc-shaped clamp B (3).

3. A dummy electrode clamp for a bipolar series electric-shock furnace according to claim 2, characterized in that: The lengths of the pin holes on one side of the arc-shaped clamp A (1) and arc-shaped clamp B (3) that mate with the pin (2) are one-third of the heights of the arc-shaped clamp A (1) and arc-shaped clamp B (3), respectively.

4. A dummy electrode fixture for a bipolar series electroslag furnace according to claim 2, characterized in that: The other side of the arc-shaped clamp A (1) and arc-shaped clamp B (3) extends radially outward to form a connecting plate (8), and the longitudinal arrangement of the connecting plate (8) has two bolt holes arranged vertically to cooperate with the bolt (4).

5. A dummy electrode clamp for a bipolar series electric-shock furnace according to claim 4, characterized in that: The arc-shaped clamping plate A (1) and arc-shaped clamping plate B (3) are respectively welded to the connecting plate (8) with stiffening plates (9).

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