Conductive short net connecting mechanism for electric furnace

Abstract

The utility model discloses a conductive short net connecting mechanism for an electric furnace, which comprises a connector, the connector is in a hollow tubular shape, a hollow tubular inner cavity is a water path and is used for water cooling, two ends of the connector respectively extend into a transformer outgoing line terminal and an inner hole of a short net copper pipe, and the inner diameter and the outer diameter of the connector are concentric with the transformer outgoing line terminal and the short net copper pipe. The outer walls of the two ends of the connector are sleeved with sealing rings respectively, and a copper clamp is clamped at the position, opposite to the connector, of the transformer outgoing line terminal and the short net copper pipe. According to the utility model, the sealing ring is used for sealing internal circulating water, and internal water does not leak; the copper clamp ensures reliable connection between the outgoing line terminal of the transformer and the short net copper pipe; and the joint is connected with the outgoing line terminal and the short net copper pipe of the transformer, so that the length of a conductive circuit is shortened, and the voltage and current loss is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of the conductive system of metallurgical electric furnaces, and particularly relates to a connecting mechanism for the conductive short network of an electric furnace. Background Art

[0002] The ferroalloy electric furnace is an important device in the steelmaking process. The short network generally refers to the general term of the current-carrying body from the secondary side outlet end of the transformer to the electrode (including the electrode). The copper pipe of the conductive short network in the electric furnace is a high-load moving load circuit, which has the characteristics of low voltage and large current. During smelting, the maximum current can generally reach tens of thousands of amperes or even more than one hundred thousand amperes. Since the short network is a large-current network, such a large current acting on the short network, even a tiny change in the resistance or inductance of the short network will have a great impact on the short network.

[0003] In the prior art, a flexible compensator is usually used to connect the transformer and the conductive short network, so as to play the role of connection and conduction. The copper heads at both ends of the traditional flexible compensator are directly in contact with the terminal of the transformer and the end face of the short network copper pipe at both ends, and a sealing ring is added to seal water. However, due to the very large current flowing through the transformer, the length of the flexible compensator connecting the transformer outlet terminal and the short network copper pipe is about 800 mm, which directly increases the length of the conductive short network, resulting in an increase in the voltage loss at the end of the electrode. At the same time, it increases the current, increases the loss, and reduces the power factor, leading to a reduction in the productivity of the electric furnace and affecting the overall operation index of the electric furnace. Summary of the Utility Model

[0004] The purpose of the utility model is to provide a connecting mechanism for the conductive short network of an electric furnace, which solves the problems of too long length of the conductor and large voltage loss existing in the flexible compensator in the prior art.

[0005] The technical solution adopted by the utility model is that the connecting mechanism for the conductive short network of an electric furnace includes a joint. The joint is in a hollow tubular shape, and the inner cavity of the hollow tubular shape is a waterway for water cooling. The two ends of the joint respectively extend into the inner holes of the transformer outlet terminal and the short network copper pipe. The inner and outer diameters of the joint are concentric with the transformer outlet terminal and the short network copper pipe. Sealing rings are respectively sleeved on the outer walls of the two ends of the joint. A copper fixture is clamped and arranged at the relative connection part of the transformer outlet terminal and the short network copper pipe.

[0006] The utility model is further characterized in that,

[0007] U-shaped grooves are respectively radially opened at both ends of the joint, and O-ring rubber sealing rings are clamped in the U-shaped grooves. During the production of the equipment, it is ensured that the transformer outlet terminal, the short network copper pipe and the joint are fixedly connected.

[0008] The copper fixture includes two semi-circular hollow arc-shaped structures. The two sides of each arc-shaped structure extend along the diameter direction of the semi-circular hollow. A number of bolt holes are respectively opened at the corresponding ends of the extension directions of the two arc-shaped structures, and bolts and nuts are threadedly connected in the bolt holes.

[0009] The outgoing line terminals of the transformer and the copper fixtures are forged. The diameter of the inner processing of the semi-circular hollow is the same as the outer diameters of the outgoing line terminals of the transformer and the short-net copper tubes, ensuring that the clamping contact surfaces completely coincide. They are fixed with bolts to ensure good contact between the copper fixtures and the outgoing line terminals of the transformer and the short-net copper tubes.

[0010] The joints are machined from copper bar stock.

[0011] The beneficial effects of the present utility model are as follows: The present utility model is used for the connecting mechanism of the conductive short net of the electric furnace. It cancels the connection of the outgoing line terminals of the transformer and the short-net copper tubes with a flexible compensator in the prior art, and adopts a rigid connection of the joints. The combination of the built-in joints and the external copper fixtures ensures that when the inside of the transformer and the conductive short net is filled with water, the transformer and the conductive short net play a role in connecting and conducting electricity, with good connection effect, shortening the conductive path length to the electrode end, reducing the active power loss, and reducing the reactive power loss. Description of the Drawings

[0012] Figure 1 is the assembly structure schematic diagram of the connecting mechanism of the conductive short net of the electric furnace of the present utility model;

[0013] Figure 2 is the structure schematic diagram of the connecting mechanism of the conductive short net of the electric furnace of the present utility model;

[0014] Figure 3 is the top view of the connecting mechanism of the conductive short net of the electric furnace of the present utility model.

[0015] In the figure, 1. Copper fixture, 2. Sealing ring, 3. Joint, 4. Bolt, 5. Nut, 6. Transformer, 7. Outgoing line terminal of the transformer, 8. Short-net copper tube, 9. Short-net fixing fixture. Detailed Embodiment

[0016] The technical solution of the present utility model will be described in detail below in conjunction with the description of the drawings and the detailed embodiment.

[0017] Embodiment 1

[0018] As Figure 1As shown in the figure, several transformer outgoing terminals 7 are fixedly arranged on one side of the transformer 6. Each transformer outgoing terminal 7 is connected to the conductive short net connection mechanism for the electric furnace of the present invention. One end of the conductive short net connection mechanism for the electric furnace is connected to the transformer outgoing terminal 7, and the other end of the conductive short net connection mechanism for the electric furnace is connected to the short net copper pipe 8. The copper pipe specifications of the transformer outgoing terminal 7 and the short net copper pipe 8 are the same. The conductive short net connection mechanism for the electric furnace of the present invention has the same current-carrying capacity as the short net copper pipe 8. The two ends of the conductive short net connection mechanism for the electric furnace of the present invention are respectively sleeved on the transformer outgoing terminal 7 and the short net copper pipe 8. Several short net copper pipes 8 are fixed by a short net fixing clamp 9 through a hoop.

[0019] Embodiment 2

[0020] The structure of the conductive short net connection mechanism for the electric furnace of the present invention is as Figure 2 and Figure 3 shown, including a joint 3. The joint 3 is in a hollow tubular shape, and the inner cavity of the hollow tubular shape is a waterway for water cooling. The two ends of the joint 3 respectively extend into the inner holes of the transformer outgoing terminal 7 and the short net copper pipe 8. The inner and outer diameters of the joint 3 are concentric with the transformer outgoing terminal 7 and the short net copper pipe 8. Sealing rings 2 are respectively sleeved on the outer walls at both ends of the joint 3. Copper clamps 1 are clamped and arranged at the positions where the transformer outgoing terminal 7 and the short net copper pipe 8 are oppositely connected to the joint 3. The copper clamps 1 are used for conducting electricity to ensure that the transformer outgoing terminal 7 and the short net copper pipe 8 are relatively fixed and do not loosen during the normal operation of the equipment.

[0021] Embodiment 3

[0022] The joint 3 is machined from a copper rod. U-shaped grooves are respectively opened in the radial directions at both ends of the joint 3, and the sealing rings 2 are clamped in the U-shaped grooves. The sealing rings 2 are O-shaped rubber sealing rings. During the production of the equipment, it is ensured that the transformer outgoing terminal 7, the short net copper pipe 8 and the joint 3 are fixedly connected and there will be no phenomenon of water leakage.

[0023] The copper clamp 1 includes two semi-circular hollow arc structures. Both sides of each arc structure extend along the diameter direction of the semi-circular hollow. A number of bolt holes are correspondingly opened at both ends of the extending directions of the two arc structures. Bolts 4 and nuts 5 are threadedly connected in the bolt holes. The transformer outgoing terminal 7 and the copper clamp 1 are forged. The diameter of the inner part of the semi-circular hollow is the same as the outer diameters of the transformer outgoing terminal 7 and the short net copper pipe 8, ensuring that the clamping contact surfaces completely coincide. Fixed by bolts 4, it is ensured that the copper clamp 1 has good contact with the transformer outgoing terminal 7 and the short net copper pipe 8, and there will be no phenomenon of water leakage.

[0024] The working principle of the connecting mechanism for the conductive short network of the electric furnace in the present utility model is that the joint 3 is a rigid connection. The joint 3 is placed inside the transformer outgoing terminal 7 and opposite to the short network copper pipe 8, shortening the distance from the transformer to the electrode end. Sealing rings 2 are arranged on both sides of the outer diameter of the joint 3 to ensure the water tightness during water passing, and there will be no water leakage during the water passing process. After the joint 3 is installed, the concentricity of the outer diameters of the connected transformer outgoing terminal 7 and the short network copper pipe 8 is ensured, and then the transformer outgoing terminal 7 and the short network copper pipe 8 are connected and fixed together by the copper fixture 1.

[0025] The working process of the connecting mechanism for the conductive short network of the electric furnace in the present utility model is that the joint 3 connects each transformer outgoing terminal 7 to the short network copper pipe 8. After the three are assembled together, the copper fixture 1 enables the current conduction between the transformer outgoing terminal 7 and the short network copper pipe 8, and is tightened by the bolt 4. The voltage and current connected to the transformer 6 pass through the transformer outgoing terminal 7, reach the short network copper pipe 8 through the copper fixture 1, and then reach the electrode end through the short network copper pipe 8. During the operation of the overall equipment, heat is generated by the copper fixture 1 and is cooled by the internal water passing through the joint 3 to ensure that the temperature of the copper pipe body is within the normal range.

[0026] The connecting mechanism for the conductive short network of the electric furnace in the present utility model adopts a direct rigid connection between the transformer outgoing terminal and the short network copper pipe, and there is no redundant flexible compensator connection to achieve current conduction and water passing. In the conductive circuit, the overall length of the conductive circuit is reduced, the installation process is reduced, that is, the loss of voltage drop is reduced, the reactive power loss is reduced, the effective power is increased, and the operation index of the equipment is improved. Under the condition of lower power consumption, the production capacity of the electric furnace is increased.

Claims

1. A short-circuit conductive connection mechanism for an electric furnace, characterized in that: The invention comprises a joint (3), the joint (3) is in the shape of a hollow tube, the inner cavity of the hollow tube is a water channel for water cooling, the two ends of the joint (3) respectively extend into the inner holes of the transformer output terminal (7) and the short-net copper tube (8), the inner and outer diameters of the joint (3) are concentric with the transformer output terminal (7) and the short-net copper tube (8), the outer walls of the two ends of the joint (3) are respectively sleeved with sealing rings (2), and the transformer output terminal (7) and the short-net copper tube (8) are clamped by a copper clamp (1) at the connection joint (3).

2. The conductive short-circuit connection mechanism for an electric furnace according to claim 1, characterized in that: U-shaped grooves are radially provided at both ends of the joint (3), and a sealing ring (2) is clamped in the U-shaped groove. The sealing ring (2) is an O-shaped rubber sealing ring, which ensures that the transformer outlet terminal (7), the short-net copper tube (8) and the joint (3) are fixedly connected during equipment production.

3. The conductive short-circuit connection mechanism for an electric furnace according to claim 1, characterized in that: The copper clamp (1) comprises two semicircular hollow arc structures, the two sides of each arc structure extending along the diameter direction of the semicircular hollow, and a plurality of bolt holes correspondingly provided at both ends of the extending direction of the two arc structures, wherein the bolt holes are threadedly connected to the bolts (4) and nuts (5).

4. The conductive short-circuit connection mechanism for an electric furnace according to claim 3, characterized in that: The transformer outlet terminal (7) and the copper clamp (1) are forged, and the diameter of the semicircular hollow interior is consistent with the outer diameter of the transformer outlet terminal (7) and the short-net copper tube (8), ensuring that the clamping contact surface completely overlaps, and are fixed by bolts (4) to ensure that the copper clamp (1) has good contact with the transformer outlet terminal (7) and the short-net copper tube (8).

5. The conductive short-circuit connection mechanism for an electric furnace according to claim 1, characterized in that: The joint (3) is machined from copper bar stock.

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