Composite busbar for mining frequency converter

Abstract

A composite busbar for a mining frequency converter comprises a pole plate main body and an insulation assembly. The pole plate main body comprises a negative pole plate and an alternating current pole plate arranged on the negative pole plate. And the negative plate comprises a second copper column. And a third mounting hole is formed in the alternating current plate. And the third mounting hole is connected with a copper column on the polar plate main body or the equipment. And the copper column on the alternating-current pole plate is riveted with the reinforcing screw. The insulating component comprises an insulating plate arranged between the alternating current plate and the negative plate, insulating films arranged on the two sides of the polar plate main body or the two sides of the insulating plate, and insulating strips arranged in gaps between the copper columns and the mounting holes. The insulating plate comprises a plurality of avoiding holes formed in the insulating plate. According to the composite busbar, the insulating plate and the insulating film are arranged to enhance the insulating property of the reinforcing screw and the composite busbar, and the insulating strip is arranged to maintain the creepage distance and the air gap of the copper column in a severe environment.

Description

Technical Field

[0001] The utility model relates to the field of composite busbars, in particular to a composite busbar for a mine frequency converter. Background Art

[0002] Composite busbar is also called composite busbar, electronic busbar, laminated busbar. Composite busbar is a circuit connected by a multi-layer composite structure composed of one or more layers of conductive materials and insulating materials. It is a multi-layer composite structure connection bar with repeatable electrical performance, low inductance impedance, strong anti-interference ability and other characteristics. Composite busbar for industrial inverter is widely used in various types of industrial inverters, directly responsible for connecting various electronic components and ensuring their safe and reliable performance, such as composite busbar for mining inverter.

[0003] Mining inverters are mostly used in humid and highly corrosive environments, which often makes the equipment run unstable and frequently causes failures and maintenance problems caused by insulation damage. Therefore, mining inverters have strict standards for the insulation performance and creepage distance of composite busbars used in mining inverters. Utility Model Content

[0004] In view of this, the utility model provides a composite busbar for a mining frequency converter to solve the above problems.

[0005] The composite busbar for the mine frequency converter includes a plate body, at least one AC component arranged on the plate body, and multiple insulating components arranged on the plate body and the AC components. The plate body includes at least one positive plate and at least one negative plate arranged on the positive plate. The positive plate includes multiple copper pillars arranged on the positive plate and multiple mounting holes arranged in a straight line with the copper pillars. The negative plate includes multiple second copper pillars arranged on the negative plate and multiple second mounting holes arranged in a straight line with the second copper pillars. The AC component includes at least one AC plate arranged on the plate body and at least one screw arranged on the AC plate. The AC plate is arranged above the negative plate, and multiple AC plates are arranged at intervals along the side of the negative plate. The insulating component includes at least one insulating plate arranged between the AC plate and the negative plate, multiple insulating strips arranged between the copper pillars, and multiple insulating films respectively arranged on both sides of the plate body and the AC plate. The insulating strip is used to ensure the minimum creepage distance between adjacent copper pillars in a harsh environment. The insulating film is used to ensure the insulation between the plate body and the AC plate.

[0006] Furthermore, positions of the copper column and the second copper column correspond to positions of the second mounting hole and the mounting hole.

[0007] Furthermore, the copper column and the second copper column arranged on the positive electrode plate and the negative electrode plate are arranged at intervals, and the mounting hole and the second mounting hole are arranged at intervals.

[0008] Furthermore, the AC component includes at least one avoidance hole arranged on the AC pole plate.

[0009] Furthermore, a protrusion is provided at the bottom of the screw.

[0010] Furthermore, the insulating strips are rectangular strips, and the cross-sections of the plurality of insulating strips are in a mountain-shaped structure.

[0011] Furthermore, the height of the insulating strip is greater than or equal to the height of the copper column.

[0012] Furthermore, the insulating film is hot-pressed by a vacuum hot press so that the mounting holes or the avoidance holes provided on the pole plate and the insulating plate are closed to increase the insulation thereof.

[0013] Compared with the prior art, the utility model provides a composite busbar for a mine frequency converter. The composite busbar is provided with the insulating plate and the insulating film that closes the mounting hole and the avoidance hole to enhance the insulation of the screws and the composite busbar, and also enables the screws to be stacked. The insulating strip is provided between adjacent copper columns to maintain the creepage distance and air gap of the copper columns in a harsh environment to meet the minimum requirements of safety regulations. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 The utility model provides a structural schematic diagram of a composite busbar for a mine frequency converter.

[0015] Figure 2 The utility model provides an exploded view of a composite busbar for a mining frequency converter. DETAILED DESCRIPTION

[0016] The following is a further detailed description of the specific embodiments of the present invention. It should be understood that the description of the embodiments of the present invention herein is not intended to limit the protection scope of the present invention.

[0017] See also Figure 1 to Figure 2 , which is a schematic diagram of the structure of the composite busbar for a mine frequency converter provided by the utility model. The composite busbar for a mine frequency converter comprises a plate body 10, at least one AC component 20 arranged on the plate body 10, and a plurality of insulating components 30 arranged on the plate body 10 and the AC component.

[0018] It is conceivable that the composite busbar for the mine frequency converter also includes some other functional modules, such as IGBT module group devices, etc., which are technologies well known to those skilled in the art and will not be described in detail here.

[0019] The electrode plate body 10 includes at least one positive electrode plate 11 and at least one negative electrode plate 12 arranged on the positive electrode plate 11. The function of the electrode plate body 10 is the same as that of the busbar, and is used to connect the power auxiliary equipment for operation. Since the paving area of ​​the electrode plate body 10 is larger than that of the ordinary line connection, its resistance is smaller than the resistance of the ordinary line. At the same time, the lines on the electrode plate body 10 are distributed regularly, and the operation and installation are more convenient. This is a general technology and will not be repeated here. The electrode plate body 10 is made of red copper. Red copper is a copper with higher purity, and it has excellent use effects in electrical conductivity, thermal conductivity, ductility and corrosion resistance. The electrode plate body 10 is pressed and bonded by a vacuum hot press. This is a general technology and will not be repeated here.

[0020] The positive plate 11 is used to receive and transmit current. The positive plate 11 includes a plurality of copper pillars 111 arranged on the positive plate 11, and a plurality of mounting holes 112 arranged in a straight line with the copper pillars 111. The copper pillars 111 are used to snap-on connect with other devices. The plurality of copper pillars 111 are arranged in a straight line, and the plurality of copper pillars 111 form a plurality of parallel row structures on the positive plate 11. The mounting holes 112 are arranged at intervals from the copper pillars 111, and are used to sleeve the copper pillars 111 arranged on other plates. The negative plate 12 includes a plurality of second copper pillars 121 arranged on the negative plate 12, and a plurality of second mounting holes 122 arranged in a straight line with the second copper pillars 121. The outer contour shape of the positive plate 11 is the same as that of the negative plate 12, the copper pillars 111 arranged on the positive plate 11 and the negative plate 12 are arranged at intervals from the second copper pillars 121, and the mounting holes 112 and the second mounting holes 122 are arranged at intervals. The positions of the copper pillar 111 and the second copper pillar 121 correspond to the positions of the second mounting hole 122 and the mounting hole 112, so that the installation of the plate overlaps. This is a common technology and will not be described here. It is conceivable that, according to actual conditions, the copper pillar 111 or the second copper pillar 121 can be continuously arranged, and the mounting hole 112 and the second mounting hole 122 can be continuously arranged.

[0021] The AC component 20 includes at least one AC pole plate 21 disposed on the pole plate body 10 , at least one screw 22 disposed on the AC pole plate 21 , and at least one avoidance hole 23 disposed on the AC pole plate 21 .

[0022] The AC pole plate 21 is used to set the screw 22. The AC pole plate 21 is set above the negative pole plate 12. A plurality of the AC pole plates 21 are arranged at intervals along the side of the negative pole plate 12. The number of the AC pole plates 21 is the same as the number of rows of the copper pillars 111. The copper pillars 111 are set on the center line of the AC pole plate 21.

[0023] In this embodiment, the screw 22 uses a rivet. A bump is provided at the bottom of the screw, and the screw 22 is fixed on the AC pole 21 by riveting with a copper column provided on the AC pole 21. This is a common technology and will not be described in detail here. The screw 22 is used to meet the locking requirements of the cable.

[0024] The avoidance holes 23 are used to avoid the overlapped parts, such as copper columns, arranged on other structures on the electrode body 10 to increase the insulation of the AC electrode 21 .

[0025] The insulating assembly 30 includes at least one insulating plate 31 disposed between the AC plate 21 and the negative plate 12, a plurality of insulating strips 32 disposed between the copper pillars, and a plurality of insulating films 33 disposed on both sides of the plate body 10, the AC plate 21, and the insulating plate 31. The insulating assembly 20 is used to keep the plate body 10 and the parts disposed on the plate body 10 insulated to ensure the safety of the user.

[0026] The insulating plate 31 includes a plurality of second avoidance holes 311 disposed on the insulating plate 31 , and the second avoidance holes 311 are used to accommodate the screws 22 , so that the screws 22 are insulated from the plate body 10 , and the problem of the rivet bottom protruding and being unable to be stacked is solved.

[0027] The insulating strip 32 is a rectangular strip, and the cross-section of the plurality of insulating strips 32 is a mountain-shaped structure. It is conceivable that the shape of the insulating strip 32 can be set to other shapes according to actual needs. The plurality of insulating strips 32 are equal in size. The height of the insulating strip 32 is greater than or equal to the height of the copper column, so that the copper column will not contact under the obstruction of the insulating strip 32, which is used to ensure the minimum creepage distance between adjacent copper columns in a harsh environment, thereby ensuring the insulation and safety of the composite busbar for the mine inverter in a mining environment.

[0028] The insulating film 33 is used to ensure the insulation between the plate body 10 and the AC plate 21. The insulating film 33 is hot-pressed by a vacuum hot press so that the mounting holes or the avoidance holes 23 set on the plate and the insulating plate 31 are closed to increase their insulation. When the plate body 10 is integrally formed, the insulating film 22 hot-presses the mounting hole 112, the second mounting hole 122, the avoidance hole 23, and the second avoidance hole 311 to seal them, thereby preventing leakage and enhancing the insulation of the composite motherboard.

[0029] Compared with the prior art, the utility model provides a composite busbar for a mine frequency converter. The composite busbar is provided with the insulating plate 31 and the insulating film 32 that closes the mounting hole and the avoidance hole 23 to enhance the insulation of the screw 22 and the composite busbar, and also enables the screw 22 to be stacked. The insulating strip 32 is provided between adjacent copper columns to maintain the creepage distance and air gap of the copper column in a harsh environment to meet the minimum requirements of safety regulations.

[0030] The above are only preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modification, equivalent substitution or improvement within the spirit of the present invention are included in the scope of the claims of the present invention.

Claims

1. A composite busbar for a mine frequency converter, characterized in that: The composite busbar for the mine frequency converter includes a plate body, at least one AC component arranged on the plate body, and multiple insulating components arranged on the plate body and the AC component. The plate body includes at least one positive plate and at least one negative plate arranged on the positive plate. The positive plate includes multiple copper pillars arranged on the positive plate and multiple mounting holes arranged in a straight line with the copper pillars. The negative plate includes multiple second copper pillars arranged on the negative plate and multiple second mounting holes arranged in a straight line with the second copper pillars. The AC component includes at least one AC plate arranged on the plate body, at least one screw arranged on the AC plate, the AC plate is arranged above the negative plate, and multiple AC plates are arranged at intervals along the side of the negative plate. The insulating component includes at least one insulating plate arranged between the AC plate and the negative plate, multiple insulating strips arranged between the copper pillars, and multiple insulating films respectively arranged on both sides of the plate body and the AC plate. The insulating strip is used to ensure the minimum creepage distance between adjacent copper pillars in a harsh environment, and the insulating film is used to ensure the insulation between the plate body and the AC plate.

2. The composite busbar for a mine frequency converter according to claim 1, characterized in that: Positions of the copper pillar and the second copper pillar correspond to positions of the second mounting hole and the mounting hole.

3. The composite busbar for a mine frequency converter according to claim 1, characterized in that: The copper column and the second copper column arranged on the positive electrode plate and the negative electrode plate are arranged at intervals, and the mounting hole and the second mounting hole are arranged at intervals.

4. The composite busbar for a mine frequency converter according to claim 1, characterized in that: The AC component includes at least one avoidance hole arranged on the AC pole plate.

5. The composite busbar for a mine frequency converter according to claim 1, characterized in that: A convex block is arranged at the bottom of the screw.

6. The composite busbar for a mine frequency converter according to claim 1, characterized in that: The insulating strips are rectangular strips, and the cross sections of the plurality of insulating strips are in a mountain-shaped structure.

7. The composite busbar for a mine frequency converter according to claim 1, characterized in that: The height of the insulating strip is greater than or equal to the height of the copper column.

8. The composite busbar for a mine frequency converter according to claim 4, characterized in that: The insulating film is hot-pressed by a vacuum hot-pressing machine so that the mounting holes or the avoidance holes arranged on the pole plate and the insulating plate are closed to increase the insulation thereof.

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