CN102931499B - Electric connection assembly - Google Patents

Abstract

The invention discloses an electrical connection assembly electrically connected with a tubular busbar. The electrical connection assembly includes an outer conduit having an inner liner. Wherein, at least one end of the outer conduit with an inner liner is inserted into the tubular busbar, and the tubular busbar and the insertion end of the outer conduit are crimped together on the outer peripheral surface of the tubular busbar in a multi-point crimping manner. Compared with the prior art, the present invention has simple structure, fewer parts, easy manufacture, low cost, convenient on-site installation and simple operation. In addition, the tubular busbar and the electrical connection assembly are crimped together by means of hydraulic point pressure, so that the outer wall of the electrical connection assembly is in close contact with the inner wall of the tubular busbar, and the contact surface pressure is high, ensuring the reliability of the electrical connection.

Description

electrical connection components

technical field

The invention relates to an electrical connection assembly, in particular to a connection device for electrical connection with a tubular busbar, especially suitable for electrical connection with a large cross-section tubular busbar.

Background technique

In various high-voltage places such as power plants, distribution substations, and large-scale industrial and mining fields, tubular busbars that transmit power frequency and high currents are required. This high-voltage tubular busbar has a large cross-section. In the prior art, for the connection operation of such a large cross-section high-pressure tubular busbar, the following three traditional connection methods are generally adopted:

1) Hoop connection method

The hoop connection method hugs the tubular busbar from the outside. The mechanical structure is complex, the size is large, and the shape is irregular. The outer covering shielding layer is not firm, and it is not easy to do shielding.

2) Welding cladding pipe connection method

The quality of clad copper pipe/wrapped steel pipe and tubular busbar welding is affected by the personal skills of the on-site operators, and the quality is difficult to control. Once the welding terminal is welded, it is difficult to disassemble and overhaul. Even if welding defects are found, it is difficult to make up for them. Moreover, the handling and operation of welding equipment and fixtures is time-consuming and labor-intensive. After long-term use, the welding part is easy to be oxidized, especially when steel is used as the auxiliary clamping material, which will increase the internal resistance and affect the transmission efficiency.

3) Screw connection method

The screw connection method needs to drill holes on the tubular busbar on site and install positioning pins, which is cumbersome and time-consuming.

In view of the above-mentioned technical problems in the prior art, it is necessary to design a connection device that is electrically connected to the tubular busbar with convenient operation, fast speed and low cost.

Contents of the invention

The object of the present invention is to solve at least one aspect of the above-mentioned problems and deficiencies in the prior art.

According to one aspect of the present invention, there is provided an electrical connection assembly, comprising: a tubular busbar; and an outer conduit having an inner liner. Wherein at least one end of the outer conduit with the inner liner is inserted into the tubular busbar, and the tubular busbar and the outer conduit are crimped together through a plurality of crimping points on the outer peripheral surface of the tubular busbar.

According to an exemplary embodiment of the present invention, the outer conduit has a first end inserted into the first tubular busbar and crimped with it, and a first end inserted into the second tubular busbar and crimped therewith. The second end together, so that the first tubular busbar and the second tubular busbar are electrically connected to each other.

According to another exemplary embodiment of the present invention, the outer catheter further has a cylindrical protrusion located between the first end and the second end, and the cylindrical protrusion is used for positioning the first tube The ends to be connected of the shaped busbar and the second tubular busbar.

According to another exemplary embodiment of the present invention, the outer diameter of the cylindrical protrusion is approximately equal to the outer diameters of the first and second tubular generatrices.

According to another exemplary embodiment of the present invention, the outer diameters of the first end and the second end of the outer conduit are respectively approximately equal to or slightly smaller than the inner diameters of the first and second tubular busbars.

According to another exemplary embodiment of the present invention, it also includes: a non-tubular busbar type outer conductor, the outer conduit having a cylindrical first end inserted into a tubular busbar and crimped together; and The outer conduit has a plate-shaped second end opposite to the first end, and the plate-shaped second end is electrically connected to the non-tubular busbar type external conductor, so that the tubular busbar and the non-tubular busbar The bus bar type external conductors are electrically connected to each other.

According to another exemplary embodiment of the present invention, the outer conduit further has a cylindrical protrusion, and the cylindrical protrusion is used for positioning the end of the tubular busbar.

According to another exemplary embodiment of the present invention, the outer diameter of the cylindrical protrusion is approximately equal to the outer diameter of the tubular busbar.

According to another exemplary embodiment of the present invention, the outer diameter of the first end of the outer conduit is approximately equal to or slightly smaller than the inner diameter of the tubular busbar.

According to another exemplary embodiment of the present invention, the inner liner is accommodated in the outer catheter in an interference fit manner.

According to another exemplary embodiment of the present invention, the hardness of the inner liner is greater than that of the outer conduit.

According to another exemplary embodiment of the present invention, hydraulic point crimping pliers are used to perform multi-point crimping on the outer peripheral surface of the tubular busbar.

According to another exemplary embodiment of the present invention, the plurality of crimping points are evenly spaced and distributed in the circumferential direction and/or the axial direction of the tubular busbar.

Compared with the prior art, the present invention has at least one of the following advantages:

(1) Simple structure, few parts, easy manufacture and low cost;

(2) Convenient on-site installation and simple operation;

(3) The tubular busbar and the electrical connection component are crimped together by means of hydraulic point pressure, so that the outer wall of the electrical connection component is in close contact with the inner wall of the tubular busbar, and the contact surface pressure is high, ensuring the reliability of the electrical connection;

(4) Since the outer diameter of the limiting protrusion of the electrical connection assembly is approximately equal to the outer diameter of the tubular busbar, the electric field is evenly distributed, which is beneficial to the insulation recovery of the tubular busbar.

Description of drawings

Fig. 1 shows a schematic longitudinal sectional view of an electrical connection assembly according to a first exemplary embodiment of the present invention;

Fig. 2 shows a schematic longitudinal cross-sectional view of the electrical connection assembly and the first and second tubular bus bars according to the first exemplary embodiment of the present invention;

Fig. 3 shows a schematic longitudinal sectional view of the electrical connection assembly according to the first exemplary embodiment of the present invention when the first and second tubular busbars are crimped together;

4 shows a cross-sectional view of the electrical connection assembly according to the first exemplary embodiment of the present invention when the first and second tubular busbars are crimped together;

Fig. 5 shows a schematic perspective view when the electrical connection assembly is crimped with the first and second tubular busbars according to the first exemplary embodiment of the present invention;

FIG. 6 shows a schematic longitudinal sectional view of an electrical connection assembly according to a second exemplary embodiment of the present invention;

Fig. 7 shows a schematic longitudinal sectional view of an electrical connection assembly and a tubular busbar crimped together according to a second exemplary embodiment of the present invention;

8 shows a cross-sectional view of an electrical connection assembly according to a second exemplary embodiment of the present invention when it is crimped together with a tubular busbar; and

FIG. 9 shows a schematic perspective view of an electrical connection assembly according to a second exemplary embodiment of the present invention.

Detailed ways

Exemplary embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals designate the same or similar elements. The embodiments described below with reference to the figures are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[first embodiment]

FIG. 1 shows a schematic longitudinal sectional view of an electrical connection assembly according to a first exemplary embodiment of the present invention.

As shown in FIG. 1 , in the present invention, the electrical connection assembly mainly includes tubular busbars 10 , 20 , an outer conduit 30 and an inner liner 40 accommodated in the lumen of the outer conduit 30 . In order to be able to conduct electricity, both the outer conduit 30 and the inner liner 40 are made of electrically conductive materials.

In an exemplary embodiment of the present invention, the hardness of the inner liner 40 is much greater than that of the outer conduit 30 . In this way, the inner liner 40 can provide enough supporting strength for the outer conduit 30 to prevent the outer conduit 30 from excessive deformation or damage under the action of external crimping force (to be described later).

In addition, in an exemplary embodiment of the present invention, the inner liner 40 can be accommodated in the outer catheter 30 in an interference fit manner.

In the exemplary embodiment shown in FIG. 1, the outer catheter 30 has a cylindrical first end 30a, a cylindrical second end 30b, and a cylindrical end located between the first end 30a and the second end 30b. raised portion 30c.

Fig. 2 shows a schematic longitudinal sectional view of the electrical connection assembly and the first and second tubular busbars sleeved together according to the first exemplary embodiment of the present invention.

As shown in FIG. 2 , the first end 30 a of the outer conduit 30 is inserted into the first tubular busbar 10 , and the second end 30 b of the outer conduit 30 is inserted into the second tubular busbar 20 . The end of the first tubular busbar 10 is positioned and limited by one end of the cylindrical protrusion 30c, and the end of the second tubular busbar 20 is positioned and limited by the other end of the cylindrical protrusion 30c.

Please continue to refer to FIG. 2 , in an exemplary embodiment of the present invention, the outer diameter of the cylindrical protrusion 30 c is approximately equal to the outer diameters of the first and second tubular busbars 10 , 20 . Because of this structural feature, the electric field distribution is uniform, which is beneficial to the insulation recovery of the tubular busbar.

In an exemplary embodiment of the present invention, the outer diameters of the first end 30 a and the second end 30 b of the outer conduit 30 are approximately equal to or slightly smaller than the inner diameters of the first and second tubular busbars 10 , 20 respectively. In this way, the first end 30a and the second end 30b of the outer conduit 30 can be easily inserted into the first and second tubular busbars 10, 20, which is convenient for on-site operation.

Fig. 3 shows a schematic longitudinal sectional view of the electrical connection assembly according to the first exemplary embodiment of the present invention when the first and second tubular busbars are crimped together. Fig. 4 shows a cross-sectional view of the electrical connection assembly according to the first exemplary embodiment of the present invention when the first and second tubular busbars are crimped together. and FIG. 5 shows a schematic perspective view of the electrical connection assembly according to the first exemplary embodiment of the present invention when the first and second tubular busbars are crimped together.

As shown in FIGS. 3 to 5 , the first tubular busbar 10 and the first end 30a of the outer conduit 30 are crimped together on the outer peripheral surface of the first tubular busbar 10 by crimping at multiple points 50a, so that The outer wall of the first end 30a of the outer conduit 30 is tightly contacted and bonded with the inner wall of the first tubular busbar 10, and the pressure on the contact surface is high to ensure the reliability of the electrical connection.

Similarly, as shown in FIGS. 3 to 5 , the second tubular busbar 20 and the second end 30b of the outer conduit 30 are crimped on the outer peripheral surface of the second tubular busbar 20 in a multi-point 50b crimping manner. Together, the outer wall of the second end 30b of the outer conduit 30 is closely contacted and bonded with the inner wall of the second tubular busbar 20, and the contact surface pressure is high, ensuring the reliability of the electrical connection.

In this way, the first tubular busbar 10 and the second tubular busbar 20 are electrically connected to each other through the electrical connection assembly.

As shown in FIG. 3 , the plurality of crimping points 50 a or 50 b are evenly spaced in three groups in the axial direction (longitudinal direction) of the first or second tubular bus bar 10 or 20 . Please note that the present invention is not limited thereto, and a plurality of crimping points 50a or 50b may be evenly spaced in the axial direction (longitudinal direction) of the first or second tubular bus bar 10 or 20 and distributed into 2 groups, 4 groups or more a.

As shown in FIG. 4 , a plurality of crimping points 50 a or 50 b are evenly distributed into four groups at intervals of 90 degrees in the circumferential direction of the first or second tubular bus bar 10 or 20 . Please note that the present invention is not limited thereto, and the plurality of crimping points 50a or 50b may be evenly distributed in 12 groups or 6 groups at intervals of 30 degrees or 60 degrees in the circumferential direction of the first or second tubular bus bar 10 or 20 .

Although not shown, in an exemplary embodiment of the present invention, hydraulic point crimping pliers are used to perform multi-point crimping on the outer peripheral surfaces of the tubular busbars 10 , 20 .

[Second embodiment]

FIG. 6 is a schematic longitudinal sectional view of an electrical connection assembly according to a second exemplary embodiment of the present invention. Fig. 7 shows a schematic longitudinal cross-sectional view of an electrical connection assembly and a tubular busbar sleeved together according to a second exemplary embodiment of the present invention.

As shown in FIG. 6 , the electrical connection assembly of the second embodiment mainly includes a tubular busbar 100 , an outer conduit 300 and an inner liner 400 accommodated in the lumen of the outer conduit 300 . In order to be able to conduct electricity, both the outer conduit 300 and the inner liner 400 are made of conductive materials.

In an exemplary embodiment of the present invention, the hardness of the inner liner 400 is much greater than that of the outer catheter 300 . In this way, the inner liner 400 can provide sufficient supporting strength for the outer catheter 300, preventing the outer catheter 300 from excessive deformation or damage under the action of external crimping force (to be described later).

In addition, in an exemplary embodiment of the present invention, the inner liner 400 can be accommodated in the outer catheter 300 in an interference fit manner.

In the exemplary embodiment shown in FIG. 6, the outer catheter 300 has a cylindrical first end 300a and a plate-shaped second end 300b opposite to the first end 300a. A cylindrical protrusion 300c is also formed on the cylindrical first end 300a.

As shown in FIG. 7 , the first end 300 a of the outer conduit 300 is inserted into the tubular busbar 100 . The end of the tubular busbar 100 is positioned and limited by the cylindrical protrusion 300c of the outer conduit 300 .

Please continue to refer to FIG. 7 , in an exemplary embodiment of the present invention, the outer diameter of the cylindrical protrusion 300 c is approximately equal to the outer diameter of the tubular bus bar 100 . Because of this structural feature, the electric field distribution is uniform, which is beneficial to the insulation recovery of the tubular busbar.

In an exemplary embodiment of the present invention, the outer diameter of the first end 300 a of the outer conduit 300 is substantially equal to or slightly smaller than the inner diameter of the tubular busbar 100 . In this way, the first end 300a of the outer conduit 300 can be easily inserted into the tubular busbar 100, which is convenient for on-site operation.

Fig. 8 shows a cross-sectional view of an electrical connection assembly and a tubular busbar crimped together according to a second exemplary embodiment of the present invention. and FIG. 9 shows a schematic perspective view of an electrical connection assembly according to a second exemplary embodiment of the present invention.

As shown in FIGS. 7 to 9 , the tubular busbar 100 and the first end 300a of the outer conduit 300 are crimped together on the outer peripheral surface of the tubular busbar 100 by crimping at multiple points 500a, so that the outer conduit 300 The outer wall of the first end 300a of the first end 300a closely contacts and joins with the inner wall of the tubular busbar 100, and the pressure on the contact surface is high, which ensures the reliability of the electrical connection.

Although not shown, the plate-shaped second end 300b of the outer conduit 300 is electrically connected to a non-tubular busbar type external conductor (not shown), so that the tubular busbar 100 and the nontubular busbar are electrically connected to each other through an electrical connection assembly. together.

In an exemplary embodiment of the present invention, referring to FIG. 6 , a plurality of bolt holes 300d for inserting connecting bolts are formed on the plate-shaped second end 300b, so that the plate-shaped second end 300b can use bolts and The aforementioned non-tubular busbar type external conductors are electrically connected.

As shown in FIG. 7 , a plurality of crimping points 500 a are evenly spaced in three groups in the axial direction (longitudinal direction) of the tubular bus bar 100 . Please note that the present invention is not limited thereto, and the plurality of crimping points 500a may be evenly spaced in the axial direction (longitudinal direction) of the tubular bus bar 100 in 2, 4 or more groups.

As shown in FIG. 8 , a plurality of crimping points 500 a are evenly distributed into four groups at intervals of 90 degrees in the circumferential direction of the tubular bus bar 100 . Please note that the present invention is not limited thereto, and the plurality of crimping points 500 a may be evenly distributed into 12 or 6 groups at intervals of 30 degrees or 60 degrees in the circumferential direction of the tubular bus bar 100 .

Although not shown, in an exemplary embodiment of the present invention, hydraulic point crimping pliers are used to perform multi-point crimping on the outer peripheral surface of the tubular bus bar 100 .

While embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that changes may be made in these embodiments without departing from the principles and spirit of the invention. The scope of application of the present invention is defined by the appended claims and their equivalents.

Claims (13)

1. An electrical connection assembly, characterized in that, the electrical connection assembly comprises: tubular bus bars (10, 20); and an outer conduit (30) with an inner liner (40), Wherein at least one end (30a, 30b) of the outer conduit (30) with the inner liner (40) is inserted into the tubular busbar (10, 20), and the tubular busbar (10, 20) is connected to the outer conduit (30) ) are crimped together through multiple crimping points (50a, 50b) on the outer peripheral surface of the tubular bus bars (10, 20), Wherein, both the inner lining pipe (40) and the outer conduit (30) are made of conductive material, and the inner lining pipe (40) supports the outer conduit (30). 2. The electrical connection assembly according to claim 1, characterized in that, The electrical connection assembly includes two tubular busbars (10, 20), which are respectively referred to as a first tubular busbar (10) and a second tubular busbar ( 20), The outer conduit (30) has a first end (30a) and a second end (30b) opposite the first end (30a), The first end (30a) of the outer conduit (30) is inserted into the first tubular bus bar (10) and crimped together with it, and the second end (30b) of the outer conduit (30) is inserted into the first The two tubular busbars (20) are crimped together, so that the first tubular busbar (10) and the second tubular busbar (20) are electrically connected to each other. 3. The electrical connection assembly according to claim 2, characterized in that, The outer catheter (30) also has a cylindrical protrusion (30c) between the first end (30a) and the second end (30b), the cylindrical protrusion (30c) is used to position the The ends to be connected of the first tubular busbar (10) and the second tubular busbar (20). 4. The electrical connection assembly according to claim 3, characterized in that, The outer diameter of the cylindrical protrusion (30c) is approximately equal to the outer diameter of the first tubular generatrix (10) or the second tubular generatrix (20). 5. The electrical connection assembly according to claim 4, characterized in that, The outer diameters of the first end (30a) and the second end (30b) of the outer conduit (30) are approximately equal to or slightly smaller than the first tubular busbar (10) and the second tubular busbar (20) respectively. ) inner diameter. 6. The electrical connection assembly according to claim 1, further comprising: External conductors of the non-tubular busbar type, The outer conduit (300) has a first end (300a) and a second end (300b) opposite to the first end (300a), the first end (300a) of the outer conduit (300) is cylindrical, the The second end (300b) of the outer conduit (300) is plate-shaped, the first end (300a) of the outer conduit (300) is inserted into and crimped with one of the tubular busbars; and The second end (300b) of the outer conduit (300) is electrically connected to the non-tubular busbar type external conductor, so that the tubular busbar and the non-tubular busbar type external conductor are electrically connected to each other. 7. The electrical connection assembly according to claim 6, characterized in that, the outer conduit (300) also has a cylindrical protrusion (300c), and the cylindrical protrusion (300c) is used for positioning the The end of the tubular busbar. 8. The electrical connection assembly according to claim 7, characterized in that, The outer diameter of the cylindrical protrusion (300c) is approximately equal to the outer diameter of the tubular busbar. 9. The electrical connection assembly according to claim 8, characterized in that, The outer diameter of the cylindrical first end (300a) of the outer conduit (300) is approximately equal to or slightly smaller than the inner diameter of the tubular busbar. 10. The electrical connection assembly according to claim 1, characterized in that, the inner liner (40) is accommodated in the outer conduit (30) in an interference fit manner. 11. The electrical connection assembly according to claim 1, characterized in that, the hardness of the inner lining tube (40) is greater than the hardness of the outer conduit (30). 12. The electrical connection assembly according to claim 1, characterized in that hydraulic point crimping pliers are used to perform multi-point crimping on the outer peripheral surface of the tubular busbar (10, 20). 13. The electrical connection assembly according to claim 1, characterized in that, The plurality of crimping points (50a, 50b) are evenly spaced in the circumferential direction and/or the axial direction of the tubular busbar (10, 20).