A longitudinal automatic compensation device for thermal expansion and cold contraction of a busbar for high current power supply of an electrolytic cell

Abstract

The utility model relates to the field of aluminium smelting especially relates to a longitudinal automatic compensation device of electrolytic cell large current power supply busbar thermal expansion and cold shrink, including support base, be provided with insulating support on the support base, the top of insulating support is provided with leveling device, the top of leveling device is provided with bottom plate, the top surface of bottom plate is provided with a plurality of recesses of side -by -side arrangement, each recess is provided with roller body in, the top of bottom plate is provided with busbar clamping seat, the bottom of busbar clamping seat leans on roller body. The utility model adopts the automatic compensation function of longitudinal deformation when large current power supply busbar thermal expansion and cold shrink is realized to the rolling friction pair, and adopts the insulating support at the same time, and it is to ensure that the live bus does not short circuit with the ground under any circumstances, causes busbar blasting accident, ensures the safety of series busbar.

Description

Technical Field

[0001] This utility model relates to the field of aluminum smelting, and in particular to an automatic longitudinal compensation device for thermal expansion and contraction of a high-current power supply busbar in an electrolytic cell. Background Technology

[0002] With the development of domestic aluminum smelting technology, large electrolytic cells of 500KA and above have become the main type of electrolytic cells for aluminum smelting, and the current passing through the busbar of the electrolytic cell is getting larger and larger. The increase in busbar current leads to higher heat generated by the busbar, and with the change in ambient temperature, the longitudinal deformation of the busbar caused by thermal expansion and contraction is also greater. The busbar needs to be equipped with a structure to eliminate the deformation caused by thermal expansion and contraction. In the past, small electrolytic cells usually used soft strip bundles to eliminate the longitudinal deformation caused by thermal expansion and contraction of the busbar due to the small busbar current. The problem with this method of using soft strip bundles to eliminate the thermal expansion and contraction of the busbar for high current power supply busbars in electrolytic cells is: (1) When the busbar current is small, the longitudinal deformation caused by thermal expansion and contraction of the busbar is small. A certain number of soft strip bundle connection parts can be set at a certain distance to eliminate the deformation effect. However, the welding of soft strip bundles during busbar installation increases the amount of busbar construction work. At the same time, the deformation caused by thermal expansion and contraction of high current busbars is large. The traditional method of using soft strip bundles to eliminate thermal expansion and contraction deformation is difficult to meet the requirements of busbar construction process. (2) Regardless of the welding quality, the welded part of the busbar soft strip bundle will definitely produce a voltage drop. This voltage drop is generally more than 1.05 times that of the busbar of the same length, or even more. Excessive soft strip bundle increases the overall line voltage drop of the electrolytic cell power supply busbar, which is not conducive to energy saving and consumption reduction in electrolytic production. (3) While the soft strip bundle eliminates the longitudinal deformation of the busbar due to thermal expansion and contraction, the deformation of the soft strip bundle itself has certain limitations. After the deformation reaches a certain degree, it will generate a reverse thrust, preventing the busbar deformation from being eliminated. Utility Model Content

[0003] Based on the above problems, the purpose of this utility model is to provide an automatic longitudinal compensation device for thermal expansion and contraction of the high-current power supply busbar in an electrolytic cell. The technical solution adopted by this utility model is as follows:

[0004] This utility model provides an automatic longitudinal compensation device for thermal expansion and contraction of a high-current power supply busbar in an electrolytic cell, including a support base, an insulating bracket on the support base, a leveling device on the top of the insulating bracket, a base plate on the top of the leveling device, a plurality of grooves arranged side by side on the top surface of the base plate, a roller body in each groove, a busbar clamping seat above the base plate, and the bottom of the busbar clamping seat abutting against the roller body.

[0005] Preferably, the supporting foundation is a concrete foundation.

[0006] Preferably, the insulating support includes a support plate, and the bottom of the support plate is connected to the supporting foundation through a plurality of insulators.

[0007] Preferably, the leveling device includes a lead screw and a connecting sleeve, the lead screw and the connecting sleeve are threadedly connected, the upper end of the lead screw abuts against the bottom of the base plate, and the connecting sleeve is fixed on the insulating bracket.

[0008] Preferably, the busbar clamping seat includes two clamping plates arranged vertically, and the two sides of the two clamping plates are fixedly connected by a bolt assembly; two L-shaped insulating bricks are arranged symmetrically on the clamping surface of the clamping plates.

[0009] Preferably, the groove is coated with butter.

[0010] Compared with the prior art, the beneficial technical effects of this utility model are as follows:

[0011] This utility model uses a rolling friction pair to achieve automatic compensation for longitudinal deformation when the high-current power supply busbar expands and contracts due to thermal expansion and contraction; at the same time, the use of an insulating support ensures that the energized busbar will not short-circuit with the ground under any circumstances, thus preventing a busbar explosion accident and ensuring the safety of the series of busbars. Attached Figure Description

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

[0013] Figure 1 This is a front view of the automatic longitudinal compensation device for thermal expansion and contraction of the high-current power supply busbar in the electrolytic cell according to this utility model.

[0014] Figure 2 This is a side view of the longitudinal automatic compensation device for thermal expansion and contraction of the high current power supply busbar in the electrolytic cell according to this utility model.

[0015] Figure 3 This is a cross-sectional view of the busbar clamping seat of this utility model.

[0016] Explanation of reference numerals in the attached drawings: 1. Supporting foundation; 2. Insulating bracket; 201. Support plate; 202. Insulator; 3. Leveling device; 301. Lead screw; 302. Connecting sleeve; 4. Base plate; 401. Groove; 5. Roller body; 6. Busbar clamp; 601. Clamping plate; 602. Bolt assembly; 603. L-shaped insulating brick; 7. Busbar. Detailed Implementation

[0017] To make the technical problems, technical solutions and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 and 2As shown in the figure, this embodiment discloses an automatic longitudinal compensation device for thermal expansion and contraction of a high-current power supply busbar in an electrolytic cell. It includes a support base 1, an insulating bracket 2 on the support base 1, a plurality of leveling devices 3 on the top of the insulating bracket 2, a base plate 4 on the top of the leveling devices 3, a plurality of grooves 401 arranged side by side on the top surface of the base plate 4, a roller body 5 in each groove 401, a busbar clamping seat 6 above the base plate 4, the busbar clamping seat 6 is used to clamp and fix the busbar 7, and the bottom of the busbar clamping seat 6 abuts against the roller body 5.

[0019] This invention utilizes the principle of rolling friction pairs, so that when the busbar expands and contracts longitudinally due to thermal expansion and contraction, the busbar can drive the busbar clamping seat 6 to roll on the roller body 5. With the help of the grease in the groove, the rolling friction resistance is reduced, and the longitudinal movement is more labor-saving.

[0020] In this embodiment, the supporting foundation 1 is a concrete foundation.

[0021] The insulating support 2 includes a support plate 201, the bottom of which is connected to the supporting base 1 via multiple insulators 202. Mounting holes are provided at both the upper and lower ends of the insulators 202, which are then fixed to the support plate 201 and the supporting base 1 using bolts.

[0022] The busbar clamp 6 includes two clamping plates 601 arranged vertically, with their sides fixedly connected by bolt assemblies 602. Two symmetrically arranged L-shaped insulating bricks 603 are provided on the clamping surfaces of the clamping plates 601. The L-shaped insulating bricks 603 are used to insulate the busbar 7 from the clamp 6. The four L-shaped insulating bricks 603 in the busbar clamp 6 are engaged at the four corner positions of the busbar 7, thereby fixing the busbar 7 in the busbar clamp 6.

[0023] In this embodiment, the clamping plate 601, the support plate 201, and the base plate 4 are all made of steel.

[0024] The leveling device 3 is used to ensure the levelness of the base plate 4 with rolling grooves during installation. For example... Figure 3 As shown, in this embodiment, the leveling device 3 includes a lead screw 301 and a connecting sleeve 302. The lead screw 301 and the connecting sleeve 302 are threadedly connected. The upper end of the lead screw 301 abuts against the bottom of the base plate 4. The bottom of the base plate 4 is provided with a positioning groove corresponding to the abutment position of the lead screw 301. The upper end of the lead screw 301 abuts in the positioning groove, and the connecting sleeve 302 is fixed on the insulating bracket 2.

[0025] The embodiments described above are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made to the technical solutions of the present utility model by those skilled in the art without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A longitudinal automatic compensation device for thermal expansion and contraction of a high-current power supply busbar in an electrolytic cell, characterized in that: The system includes a support base (1), an insulating bracket (2) is provided on the support base (1), a leveling device (3) is provided on the top of the insulating bracket (2), a base plate (4) is provided on the top of the leveling device (3), a plurality of grooves (401) are arranged side by side on the top surface of the base plate (4), a roller (5) is provided in each groove (401), a busbar clamping seat (6) is provided above the base plate (4), and the bottom of the busbar clamping seat (6) abuts against the roller (5).

2. The automatic longitudinal compensation device for thermal expansion and contraction of the high-current power supply busbar of the electrolytic cell according to claim 1, characterized in that: The supporting foundation (1) is a concrete foundation.

3. The automatic longitudinal compensation device for thermal expansion and contraction of the high-current power supply busbar of the electrolytic cell according to claim 1, characterized in that: The insulating support (2) includes a support plate (201), the bottom of which is connected to the supporting base (1) by a plurality of insulators (202).

4. The automatic longitudinal compensation device for thermal expansion and contraction of the high-current power supply busbar of the electrolytic cell according to claim 1, characterized in that: The leveling device (3) includes a lead screw (301) and a connecting sleeve (302). The lead screw (301) and the connecting sleeve (302) are threaded together. The upper end of the lead screw (301) abuts against the bottom of the base plate (4). The connecting sleeve (302) is fixed on the insulating bracket (2).

5. The automatic longitudinal compensation device for thermal expansion and contraction of the high-current power supply busbar of the electrolytic cell according to claim 1, characterized in that: The busbar clamp (6) includes two clamping plates (601) arranged vertically, and the two sides of the two clamping plates (601) are fixedly connected by bolt assembly (602); two L-shaped insulating bricks (603) are arranged symmetrically on the clamping surface of the clamping plate (601).

6. The automatic longitudinal compensation device for thermal expansion and contraction of the high-current power supply busbar of the electrolytic cell according to claim 1, characterized in that: The groove (401) is coated with butter.

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