Sealing structure for conducting bar of transformer of electroslag furnace

Abstract

The utility model discloses a sealing structure for a conducting bar of an electroslag furnace transformer. The sealing structure comprises a cover plate and the conducting bar of the electroslag furnace transformer, the conducting bar is hermetically inserted into the cover plate, and the lower end of the conducting bar extends into the transformer and is connected to the wiring board; a sealing structure; the sealing structure comprises a bottom plate and a sealing block, the bottom plate is installed on the cover plate, the cover plate covers jacks of the conducting bar on the cover plate, a boss is arranged on the bottom plate, a groove communicated with the jacks of the conducting bar is formed in the boss, the sealing block is connected to the conducting bar in a sleeving mode, a protruding block is arranged at the lower end of the sealing block, the protruding block is matched with the groove, and the sealing block is arranged on the bottom plate. The top of the sealing block is provided with a sheath which wraps the conducting bar. The device is simple in structure and convenient to use, effectively improves the sealing performance between the conducting bar and the transformer through the design of the sealing structure, prevents the invasion of gas, liquid or impurities, and guarantees the safe operation of the transformer.

Description

Technical Field

[0001] The utility model relates to the technical field of the sealing structure of a current-carrying busbar, in particular to a sealing structure for a current-carrying busbar of an electroslag furnace transformer. Background Technique

[0002] An electroslag furnace is a special smelting device that melts a consumable electrode inserted into a slag bath by the heat generated by an electric arc. In an electroslag furnace, metal droplets are cleaned through the slag liquid and then crystallize into an electroslag ingot in a water-cooled mold. This smelting method utilizes the inclusion-removing effect of the slag liquid and good crystallization conditions to produce metal materials with high purity and excellent tissue properties. The working principle of an electroslag furnace is that when an electric current passes through a liquid slag bath, the slag resistance heat melts the metal electrode. The melted metal gathers into droplets, which pass through the slag layer when dripping and enter the metal molten pool, and finally solidify into an ingot in the mold. The electroslag furnace transformer is a power transformer designed specifically for an electroslag furnace and is designed according to the technological requirements of producing special steel and products by the electroslag method. This transformer has the characteristics of low output voltage, large current, large and fine pressure regulation range, smooth external characteristics, and stable operation.

[0003] In an electroslag furnace transformer, a current-carrying busbar is a component for transmitting current. After retrieval, the Chinese patent application number: CN202021155693.9 discloses a current-carrying busbar structure applied to a transformer, including a current-carrying busbar body, and connecting plates are fixedly installed at the top and bottom of the current-carrying busbar body. For the current-carrying busbar structure applied to the transformer, through the connecting substrate arranged on the connecting plate, it is convenient to fix the rotating shaft, and thus the functions of connection and support are achieved. Through two mounting holes arranged inside the connecting plate, quick positioning is convenient, avoiding the instability of a single mounting hole and the cumbersome loading and unloading of multiple mounting holes. Through the rotating shaft and the connecting sleeve being rotatably connected, it is convenient to form a rotatable manner between the current-carrying busbar body and the mounting plate, and thus it can be applied to the conductive connection of different transformers, and the angle between the current-carrying busbar body and the mounting plate can be changed, which is convenient to adjust the angle during installation and avoids the problem that the traditional integral structure cannot be angle-changed and is not convenient for installation.

[0004] When the above technical solution and the traditional current-carrying busbar are connected to an electroslag furnace transformer, they both rely on a single-layer seal for sealing, and there are often problems such as poor sealing and easy leakage. These problems may lead to a decline in the performance of the transformer or even a failure. Therefore, we need to propose a sealing structure for a current-carrying busbar of an electroslag furnace transformer. Content of the Utility Model

[0005] The purpose of the present utility model is to provide a sealing structure for the conductive busbar of an electroslag furnace transformer. The device has a simple structure and is convenient to use. Through the design of the sealing structure, the sealing performance between the conductive busbar and the transformer is effectively improved, preventing the intrusion of gas, liquid or impurities, and ensuring the safe operation of the transformer, so as to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present utility model provides the following technical solutions:

[0007] A sealing structure for the conductive busbar of an electroslag furnace transformer, comprising: a cover plate and a conductive busbar of the electroslag furnace transformer; the conductive busbar is hermetically inserted into the cover plate, and the lower end of the conductive busbar extends into the transformer and is connected to a wiring board; a sealing structure for connecting between the conductive busbar and the cover plate is included; the sealing structure includes a bottom plate and a sealing block, the bottom plate is installed on the cover plate, and the cover plate covers the jack of the conductive busbar on the cover plate. A boss is provided on the bottom plate, and a groove communicating with the jack of the conductive busbar is opened on the boss. The sealing block is sleeved on the conductive busbar, a convex block is provided at the lower end of the sealing block, the convex block is adapted to the groove, and a sheath is provided at the top of the sealing block, and the sheath covers the conductive busbar.

[0008] Preferably, a surrounding edge is provided on the sealing block, and the surrounding edge is located outside the convex block.

[0009] Preferably, a clamping groove is provided on the boss of the bottom plate, the clamping groove is located outside the groove, and the clamping groove corresponds to the surrounding edge.

[0010] Preferably, the sealing block, the convex block, the surrounding edge and the sheath are integrally formed, and the sealing block, the convex block, the surrounding edge and the sheath are all made of rubber material.

[0011] Preferably, a pressing mechanism is further included, and the pressing mechanism includes a pressing plate, and the pressing plate is arranged in a mouth shape.

[0012] Preferably, support plates are symmetrically arranged on both sides of the boss on the bottom plate, the support plates are arranged in an inverted L shape, and the pressing plate is arranged between the upper ends of the two groups of support plates through a screw rod.

[0013] Preferably, connecting plates are integrally formed on both sides of the pressing plate, first through holes are opened on the connecting plates, and second through holes corresponding to the first through holes are opened at the upper ends of the support plates.

[0014] Preferably, a limiting block is provided at the upper end of the screw rod, the lower end of the screw rod sequentially penetrates through the second through hole and the first through hole and is threadedly connected with a nut, and a compression spring is sleeved on the screw rod between the connecting plate and the support plate.

[0015] Compared with the prior art, the beneficial effects of the present utility model are:

[0016] The utility model installs a bottom plate on the cover plate of the electroslag furnace transformer. A boss is arranged on the bottom plate, a groove and a clamping groove are arranged on the boss, a sealing block is sleeved on the current-carrying bar, a convex block and a peripheral edge are arranged at the bottom of the sealing block, and a sheathing is arranged at the top of the sealing block. The device has a simple structure and is convenient to use. Through the design of the sealing structure, the sealing performance between the current-carrying bar and the transformer is effectively improved, the intrusion of gas, liquid or impurities is prevented, and the safe operation of the transformer is ensured. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the utility model;

[0018] Figure 2 is a schematic structural diagram of the sealing block of the utility model;

[0019] Figure 3 is a schematic structural diagram of the groove of the utility model;

[0020] Figure 4 is a schematic structural diagram of the pressing plate of the utility model.

[0021] In the figure: 1, cover plate; 2, current-carrying bar; 3, bottom plate; 4, sealing block; 5, convex block; 6, peripheral edge; 7, sheathing; 8, groove; 9, clamping groove; 10, pressing plate; 11, connecting plate; 12, first through hole; 13, support plate; 14, second through hole; 15, screw; 16, limiting block; 17, nut; 18, compression spring. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0022] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0023] Please refer to Figures 1-3 , the present utility model provides a technical solution: a sealing structure for the current-carrying bar 2 of an electroslag furnace transformer, including:

[0024] The cover plate 1 and the current-carrying bar 2 of the electroslag furnace transformer; the current-carrying bar 2 is hermetically inserted into the cover plate 1, and the lower end of the current-carrying bar 2 extends into the transformer and is connected to the wiring board;

[0025] It includes a sealing structure for the connection between the busbar 2 and the cover plate 1; the sealing structure includes a bottom plate 3 and a sealing block 4. The bottom plate 3 is installed on the cover plate 1, and the cover plate 1 covers the jack of the busbar 2 on the cover plate 1. There is a boss on the bottom plate 3, and a groove 8 communicating with the jack of the busbar 2 is opened on the boss. The sealing block 4 is sleeved on the busbar 2. There is a convex block 5 at the lower end of the sealing block 4, and the convex block 5 is adapted to the groove 8. There is a sheath 7 at the top of the sealing block 4, and the sheath 7 covers the busbar 2.

[0026] There is a surrounding edge 6 on the sealing block 4, and the surrounding edge 6 is located outside the convex block 5. There is a clamping groove 9 on the boss of the bottom plate 3, and the clamping groove 9 is located outside the groove 8, and the clamping groove 9 corresponds to the surrounding edge 6. The sealing block 4, the convex block 5, the surrounding edge 6, and the sheath 7 are integrally formed, and the sealing block 4, the convex block 5, the surrounding edge 6, and the sheath 7 are all made of rubber material.

[0027] By installing the bottom plate 3 on the cover plate 1 of the electroslag furnace transformer, there is a boss on the bottom plate 3, and a groove 8 and a clamping groove 9 are provided on the boss. The sealing block 4 is sleeved on the busbar 2, there are a convex block 5 and a surrounding edge 6 at the bottom of the sealing block 4, and there is a sheath 7 at the top of the sealing block 4. During use, the bottom plate 3 is installed on the cover plate 1, the sealing strip is sleeved on the busbar 2, the convex block 5 tightly holds the lower part of the busbar 2 to form a seal at the lower part of the busbar 2, and the sheath 7 tightly holds the upper part of the busbar 2 to form a seal for the upper part of the busbar 2. When the busbar 2 is inserted into the jack on the cover plate 1, the convex block 5 just fits into the inside of the groove 8 to block the jack on the cover plate 1 to achieve sealing. At the same time, the surrounding edge 6 just fits into the inside of the clamping groove 9 to achieve secondary sealing. The multiple sealing methods improve the tightness of the connection between the busbar 2 and the transformer cover plate 1;

[0028] Generally speaking, the structure of this device is simple and easy to use. Through the design of the sealing structure, the sealing performance between the busbar 2 and the transformer is effectively improved, preventing the intrusion of gas, liquid or impurities, and ensuring the safe operation of the transformer.

[0029] Among them, the materials of the sealing block 4, the convex block 5, the surrounding edge 6, and the sheath 7 are set as polyurethane rubber, which has excellent wear resistance, high strength, good elasticity within the Shore A60 to Shore A70 hardness range, good buffer and shock absorption performance, the higher the vibration frequency, the greater the energy absorption, good oil resistance and chemical resistance, less affinity with non-polar mineral oil, and hardly eroded in fuel oil and machine oil, and has a relatively high friction coefficient. It can also be replaced with nitrile rubber material according to the actual situation.

[0030] Furthermore, please refer to Figures 1-4 :

[0031] It further includes a pressing mechanism, and the pressing mechanism includes a pressing plate 10 which is arranged in a shape like a mouth. On the bottom plate 3, support plates 13 are symmetrically arranged on both sides of the convex platform. The support plates 13 are arranged in an inverted L shape. The pressing plate 10 is arranged between the upper ends of two groups of support plates 13 through a screw 15. Connecting plates 11 are integrally formed on both sides of the pressing plate 10. First through holes 12 are formed in the connecting plates 11, and second through holes 14 corresponding to the first through holes 12 are formed in the upper ends of the support plates 13. A limiting block 16 is arranged at the upper end of the screw 15. The lower end of the screw 15 sequentially penetrates through the second through hole 14 and the first through hole 12 and is threadedly connected with a nut 17. A compression spring 18 is sleeved on the screw 15 between the connecting plate 11 and the support plate 13.

[0032] After inserting the busbar 2 into the jack on the cover plate 1 and completing the combination of the sealing block 4 and the convex platform on the bottom plate 3, place the pressing plate 10 on the top of the sealing block 4. Pass the screw 15 through the second through hole 14 and the first through hole 12 in sequence and lock it with the nut 17. Since the compression spring 18 is sleeved on the screw 15, under the action of the compression spring 18, the pressing plate 10 can firmly fit on the top surface of the sealing block 4, so as to achieve the pressing effect, avoid the sealing block 4 easily detaching from the convex platform on the bottom plate 3, further improve the tightness of the connection between the busbar 2 and the cover plate 1, and has high practical value.

[0033] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A sealing structure for a conductive bar of an electroslag furnace transformer, characterized in that: include: A cover plate (1) and a conductive bar (2) of an electroslag furnace transformer, wherein the conductive bar (2) is sealed and plugged into the cover plate (1); The lower end of the conductive bar (2) extends into the interior of the transformer and is connected to a terminal board; It comprises a sealing structure for connecting a conductive bar (2) and a cover plate (1).

2. The sealing structure for the conductive bar of an electroslag furnace transformer according to claim 1, characterized in that: The sealing structure comprises: A bottom plate (3) and a sealing block (4), wherein the bottom plate (3) is mounted on the cover plate (1), and the cover plate (1) covers the insertion holes of the conductive bar (2) on the cover plate (1); The bottom plate (3) is provided with a boss, and the boss is provided with a groove (8) connected to the plug hole of the conductive bar (2); The sealing block (4) is sleeved on the conductive bar (2), a protrusion (5) is arranged at the lower end of the sealing block (4), the protrusion (5) and the groove (8) are matched, and a sleeve (7) is arranged on the top of the sealing block (4), and the sleeve (7) covers the conductive bar (2).

3. The sealing structure for the conductive bar of an electroslag furnace transformer according to claim 2, characterized in that: The sealing block (4) is provided with a peripheral edge (6), and the peripheral edge (6) is located at the periphery of the protrusion (5).

4. The sealing structure for the conductive bar of an electroslag furnace transformer according to claim 3, characterized in that: A clamping groove (9) is provided on the boss on the bottom plate (3), the clamping groove (9) is located at the periphery of the groove (8), and the clamping groove (9) corresponds to the surrounding edge (6).

5. The sealing structure for the conductive bar of an electroslag furnace transformer according to claim 4, characterized in that: The sealing block (4), the protruding block (5), the surrounding edge (6) and the sleeve (7) are integrally formed.

6. The sealing structure for the conductive bar of an electroslag furnace transformer according to claim 5, characterized in that: It also comprises a pressing mechanism, wherein the pressing mechanism comprises a pressing plate (10), and the pressing plate (10) is arranged in a slot shape.

7. The sealing structure for the conductive bar of an electroslag furnace transformer according to claim 6, characterized in that: Support plates (13) are symmetrically arranged on both sides of the boss on the bottom plate (3), and the support plates (13) are arranged in an inverted L shape. The pressing plate (10) is arranged between the upper ends of the two groups of support plates (13) through a screw rod (15).

8. The sealing structure for the conductive bar of an electroslag furnace transformer according to claim 7, characterized in that: The two sides of the pressure plate (10) are integrally formed with connecting plates (11), a first through hole (12) is provided on the connecting plate (11), and a second through hole (14) corresponding to the first through hole (12) is provided at the upper end of the support plate (13).

9. The sealing structure for the conductive bar of an electroslag furnace transformer according to claim 8, characterized in that: A limit block (16) is arranged at the upper end of the screw rod (15); the lower end of the screw rod (15) passes through the second through hole (14) and the first through hole (12) in sequence and is threadedly connected with a nut (17); and a compression spring (18) is sleeved on the screw rod (15) and located between the connecting plate (11) and the supporting plate (13).

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