CN113363027B

CN113363027B - Insulating sheath of conductive bar connector

Info

Publication number: CN113363027B
Application number: CN202110647662.8A
Authority: CN
Inventors: 王玮; 王彬
Original assignee: Siemens Switchgear Ltd
Current assignee: Siemens Switchgear Ltd
Priority date: 2021-06-10
Filing date: 2021-06-10
Publication date: 2023-05-05
Anticipated expiration: 2041-06-10
Also published as: CN113363027A

Abstract

An insulating sheath for a busbar joint comprises two elastic half-shells (10) mutually covering in a first direction (D1). The two elastic half-shells can enclose a receiving chamber (70). Each elastic half-shell comprises a cut-out (20), the cut-outs of the two elastic half-shells being joined in a first direction. The two mutually engaging cutouts serve to close a channel of the receiving space into which the conductor bars can be inserted in an insertion direction (S), wherein the insertion direction is perpendicular to the first direction. Each cutting part comprises an engagement part (21) and an extension part (23). The joint part is arranged at one end of the cutting part along the first direction and is used for jointing the joint part of the other elastic half shell. The extending part gradually extends from the joint part to the other end of the cutting part along the first direction along the corresponding inserting direction. The insulating sheath has higher universality.

Description

Insulating sheath of conductive bar connector

Technical Field

The invention relates to an insulating sheath, in particular for a busbar joint.

Background

A switchgear is an electrical device that is widely used in power systems. Copper bars in switchgear are commonly used as power transmission media. Insulating sheaths are often installed at the copper bar lap joints of the switch cabinets so as to improve the insulating performance of the switch cabinets. However, the specifications of the copper bar connectors are different according to different current levels. Therefore, in the prior art, special insulation sheaths are designed for copper bar connectors with different specifications, so that the universality of the special insulation sheaths is low.

Disclosure of Invention

The invention aims to provide an insulating sheath of a conductive bar connector, which has high universality.

The invention provides an insulating sheath of a conductive bar joint, which comprises two elastic half-shells mutually covered along a first direction. The two elastic half-shells can enclose a receiving chamber. Each elastic half-shell comprises at least one cutting part, and the cutting parts of the two elastic half-shells are jointed along the first direction. The two mutually engaging cutouts serve to close a channel of the receiving chamber into which the conductor bars can be inserted in an insertion direction, wherein the insertion direction is perpendicular to the first direction. Each cutting portion includes an engagement portion and an extension portion. The joint part is arranged at one end of the cutting part along the first direction and is used for jointing the joint part of the other elastic half shell. The extending part gradually extends from the joint part to the other end of the cutting part along the first direction along the corresponding inserting direction.

The insulating sheath of the conductive bar connector can be properly cut according to the specification of the conductive bar so as to be suitable for conductive bars of different specifications, and if a plurality of cutting parts are provided, the insulating sheath can also be suitable for conductive bar connectors of various types, thereby having higher universality. The slope design of the extension part enables the sheared part to be bent at a small angle to be abutted against the conductive bar, so that the installation is facilitated, and the slope design is also beneficial to improving the cutting precision.

In a further exemplary embodiment of the insulating sheath of the busbar joint, the projection of the cutout on a plane perpendicular to the insertion direction is rectangular. Therefore, the insulation sheath and the conductive bars can be matched more compactly.

In a further exemplary embodiment of the insulating sheath of the busbar joint, the elastic half-shell has a first cut-out along the edge of the cut-out. Thereby facilitating clipping.

In a further exemplary embodiment of the insulating sheath of the busbar joint, the extension is plate-shaped and is arranged parallel to a direction perpendicular to both the first direction and the corresponding insertion direction. The structure is simple and convenient to process.

In a further exemplary embodiment of the insulating sheath of the busbar joint, the elastic half-shell is provided with four cutouts. The four cutting parts are distributed along the circumference of the elastic half shell, which is perpendicular to the first direction. The insertion directions corresponding to every two adjacent cutting parts are mutually perpendicular. Thereby, the universality of the insulating sheath can be further improved.

In a further exemplary embodiment of the insulating sheath of the busbar joint, each elastic half-shell is further provided with four connection portions. The four connecting portions and the four cutting portions are alternately connected in a circumferential direction perpendicular to the first direction. Each connecting part is provided with a fixing part which is in a flat plate shape perpendicular to the first direction and is attached to one fixing part of the other elastic half shell. Thereby facilitating the connection and fixation of the elastic half-shell.

In yet another exemplary embodiment of the insulating jacket of the busbar joint, the insulating jacket further comprises four fasteners. Each fixing piece is arranged on the two mutually attached fixing parts in a penetrating way so as to fix the relative positions of the two fixing parts. Thereby facilitating the connection and fixation of the elastic half-shell.

In a further exemplary embodiment of the insulating sheath of the busbar joint, each elastic half-shell further comprises a top part which is located on one side of the receiving chamber in the first direction and connects the cut-out and the connection part along a circumferential outer edge perpendicular to the first direction. The top portion includes an annular portion and a spacing portion. The annular portion has a flat plate shape perpendicular to the first direction. The outer edge of the annular part is connected with the cutting part and the connecting part. The limiting part is connected with the inner edge of the annular part and provided with a concave cavity extending along the first direction so as to accommodate the fixing part of the conductive bar connector. Thereby improving the stability in use.

In a further exemplary embodiment of the insulating sheath of the busbar joint, the annular portion is provided with a second cut groove surrounding the limit portion. Thereby facilitating clipping.

In a further exemplary embodiment of the insulating sheath of the busbar joint, the elastic half-shell further comprises a number of reinforcements. Each reinforcing portion has a columnar shape extending from the annular portion in a direction parallel to the first direction. The reinforcement parts of the two elastic half-shells are in contact with each other in a first direction. Thereby being beneficial to improving the deformation resistance of the integral structure of the insulating sheath.

In yet another exemplary embodiment of the insulating sheath of the busbar joint, the busbar is a copper busbar.

Drawings

The following drawings are only illustrative of the invention and do not limit the scope of the invention.

Fig. 1 is a schematic structural view of an exemplary embodiment of an insulating sheath of a copper bar joint.

FIG. 2 is a cross-sectional view taken along IV-IV in FIG. 1.

Fig. 3 is an exploded view of two elastic half-shells of the insulating sheath shown in fig. 1.

Fig. 4 is a top view of the insulating sheath shown in fig. 1.

Fig. 5 is a schematic view for explaining a method of using the insulating sheath shown in fig. 1.

Fig. 6 is a schematic view of the insulating sheath of fig. 1 in a use state.

Fig. 7 is a schematic view of another use state of the insulating sheath shown in fig. 1.

Description of the reference numerals

10. Elastic half shell

11. First cutting groove

12. Second cutting groove

13. Expansion hole

20. Cutting part

21. Joint part

23. Extension part

30. Connecting part

31. Fixing part

40. Top part

41. Annular part

42. Limiting part

43. Concave cavity

50. Reinforcing part

70. Accommodating chamber

80. Fixing piece

91. Copper bar

92. Fixing component

93. External structure

D1 First direction

R circumference direction

S insertion direction

Detailed Description

For a clearer understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the drawings, in which like reference numerals refer to identical or structurally similar but functionally identical components throughout the separate views.

In this document, "schematic" means "serving as an example, instance, or illustration," and any illustrations, embodiments described herein as "schematic" should not be construed as a more preferred or advantageous solution.

Herein, "first", "second", etc. do not indicate the degree of importance or order thereof, etc., but merely indicate distinction from each other to facilitate description of documents.

For the sake of simplicity of the drawing, the parts relevant to the present invention are shown only schematically in the figures, which do not represent the actual structure thereof as a product.

The conducting bars are used for connecting two or more components to conduct electricity, copper bars or aluminum bars are generally adopted in the switch cabinet, and the copper bars are widely used. For convenience of description, a copper bar will be described as an example. Fig. 1 is a schematic structural view of an exemplary embodiment of an insulating jacket of a copper bar joint, and fig. 2 is a cross-sectional view taken along iv-iv in fig. 1. As shown in fig. 1 and 2, the insulating sheath of the copper bar joint includes two elastic half-shells 10 that are mutually covered along one first direction D1, and the elastic half-shells 10 are integrally molded from insulating rubber, for example. Fig. 3 is an exploded view of two elastic half-shells of the insulating sheath shown in fig. 1. As shown in fig. 2, the two elastic half-shells 10 can enclose a receiving chamber 70 after being closed.

Each elastic half-shell 10 comprises at least one cutting portion 20, and the number of cutting portions 20 can be set according to practical needs, for example, 1, 2, 3 or 4, or even more. Since the types of the copper bar connectors are various, for example, there are a straight shape, an L shape, a T shape and a cross shape, if the number of the cutting portion 20 is four, it can be applied to the four types of copper bar connectors, and it is very convenient. Therefore, an insulating sheath having four cutouts 20 will be described below as an example.

Fig. 4 is a top view of the insulating sheath shown in fig. 1 along a first direction D1, and as shown in fig. 4, each elastic half shell 10 includes four cut-out portions 20, four connection portions 30, and one top portion 40. As shown in fig. 1 and 4, four cutouts 20 are distributed along a circumferential direction R of the elastic half shell 10 perpendicular to the first direction D1. The four connecting portions 30 and the four cutout portions 20 are alternately connected in the circumferential direction R perpendicular to the first direction D1. The top 40 is located at one side of the accommodation chamber 70 in the first direction D1, and connects the cutout 20 and the connection 30 along an outer edge of the circumferential direction R perpendicular to the first direction D1.

As shown in fig. 1 and 2, the cut-out portions 20 of the two elastic half-shells 10 are joined in the first direction D1 in one-to-one correspondence. The two mutually engaging cutouts 20 serve to close a passage of the receiving chamber 70 into which the copper bar can be inserted in an insertion direction S, wherein the insertion direction S is perpendicular to the first direction D1. I.e. each two interengaged cutouts 20 have a respective one of their insertion directions S in which the copper bar is blocked by the two interengaged cutouts 20 when inserted into the receiving cavity 70. As shown in fig. 4, in the present exemplary embodiment, the insertion directions S corresponding to each adjacent two of the cutting portions 20 are perpendicular to each other.

As shown in fig. 1 and 2, each cutout portion 20 includes one engagement portion 21 and one extension portion 23. The engaging portion 21 is provided at one end of the cutout portion 20 in the first direction D1 and is for engaging the engaging portion 21 of the other elastic half-shell 10. The extension portion 23 extends gradually from the engagement portion 21 toward the other end of the cutout portion 20 in the first direction D1 along the insertion direction S corresponding thereto. Specifically, in the present exemplary embodiment, the extension portion 23 is formed in a flat plate shape and is provided in parallel to a direction perpendicular to both the first direction D1 and the insertion direction S corresponding thereto (the direction in the cutting portion 20 on both the left and right sides in fig. 2, that is, the direction perpendicular to the drawing plane in fig. 2), and thus the extension portion 23 is formed in an inclined shape, but not limited thereto, and in other exemplary embodiments, the extension portion 23 may be formed in a curved plate shape, for example.

Fig. 5 shows a view of the cutting portion along the insertion direction S corresponding thereto, and as shown in fig. 5, in the present exemplary embodiment, the projection of the cutting portion 20 on the plane perpendicular to the insertion direction S is a rectangle with left and right opposite sides parallel to the first direction D1, and the rectangular shape matches with the cross-sectional shape of the copper bar, so that the matching between the insulating sheath and the copper bar can be made more compact, but is not limited thereto. The elastic half-shell 10 has a first cutting groove 11 along the edge of the cutting portion 20, whereby cutting may be facilitated, but is not limited thereto, and in other exemplary embodiments, the first cutting groove may not be provided or the cutting position may be marked with a drawn pattern.

As shown in fig. 1, each connecting portion 30 has one fixing portion 31, and the fixing portion 31 is flat perpendicular to the first direction D1 and is attached to one fixing portion 31 of the other elastic half shell 10. As shown in fig. 1 and 4, the insulating sheath further includes four fixing members 80. Each fixing piece 80 is inserted into the two attached fixing portions 31 to fix the relative positions of the two fixing portions 31. In the present exemplary embodiment, the fixing member 80 is a pair of rivets, but is not limited thereto, and the pair of rivets are made of plastic, for example. In other exemplary embodiments, the two elastic half-shells 10 of the insulating sheath can also be fastened by other means, such as, for example, a snap fit or an adhesive.

When in use, the cutting part 20 to be cut is selected according to the type of the copper bar connector. Specifically, referring to fig. 4, if the copper bar joint is in a straight shape, two pairs of cutting portions 20 on the upper side and the lower side or two pairs of cutting portions 20 on the left side and the right side may be selected to cut; if the copper bar joint is L-shaped, two adjacent pairs of cutting parts 20 can be selected for cutting; if the copper bar joint is T-shaped, any three pairs of cutting parts 20 can be selected for cutting; if the copper bar joint is cross-shaped, four pairs of cutting portions 20 are required for cutting. The pair of cutout portions 20 refers to two cutout portions 20 that are joined to each other in the first direction D1. The uncut cut-out 20 may serve as a closed insulation. Then, the cutting portion 20 needs to be cut according to the thickness of the copper bar. Referring specifically to fig. 5, the cutting is performed along the dashed line in the drawing, and the cutting dimension is selected according to the thickness of the copper bar, for example, the cross-sectional size of the cut-out portions of the two cutting portions 20 that are mutually joined in the insertion direction S is substantially identical to or slightly larger than the cross-sectional size of the copper bar, and one of the pair of cutting portions 20 may be selected for cutting, or both may be selected for cutting according to the actual situation. Finally, the copper bar connector is clamped between the two elastic half-shells 10 and the two elastic half-shells 10 are fixed by the fixing piece 80, and at this time, the sheared part of the cutting part 20 bends under the abutting of the copper bar and is abutted against the copper bar under the action of the elastic force caused by the bending. Fig. 6 shows a state after the insulating sheath is mounted on the copper bar joint, in which the joint ends of the copper bars 91 are fixed together by fixing members 92, which may be bolts 92. The copper bar joint shown in fig. 6 is in a straight shape.

The insulating sheath of the conductive bar connector can be appropriately cut according to the specification of the conductive bar so as to be suitable for conductive bars with different specifications, and if a plurality of cutting parts are provided, the insulating sheath can also be suitable for conductive bar connectors with various types, such as a straight shape, an L shape, a T shape and a cross shape, thereby having higher universality. The slope design of the extension part enables the sheared part to be bent at a small angle to be abutted against the conductive bar, so that the installation is facilitated, and the slope design is also beneficial to improving the cutting precision.

In the present exemplary embodiment, each elastic half shell 10 includes four clipping portions 20, but not limited thereto, and in other exemplary embodiments, the number of clipping portions 20 may be adjusted as necessary so as to have an appropriate versatility. The number of clips 20 is for example one, in which case additional openings need to be provided in the insulating sheath for inserting the copper bars. It will be appreciated that the greater the number of clips 20, the greater the versatility of the insulating sheath.

In the present exemplary embodiment, the top 40 includes a ring portion 41 and a stopper portion 42. The annular portion 41 has a flat plate shape perpendicular to the first direction D1. The outer edge of the annular portion 41 connects the cutout portion 20 and the connection portion 30. The limiting portion 42 is connected to the inner edge of the annular portion 41 and has a cavity 43 (see fig. 2) extending in the first direction D1 to accommodate the fixing member 92 of the copper bar connector. As shown in fig. 6, in use, the walls of the cavity 43 are able to limit the movement of the copper bar connector relative to the insulating sheath by abutting against the fixing member 92, thereby facilitating increased stability in use.

As shown in fig. 4, in the exemplary embodiment, the annular portion 41 is provided with the second cutting groove 12 surrounding the stopper portion 42. As shown in fig. 7, when an external structure 93 needs to be connected to the copper bar connector in the first direction D1, it may be cut along the second cutting groove 12 to form an expansion hole 13, and the external structure 93 may be connected to the copper bar connector through the expansion hole 13.

As shown in fig. 2 and 3, in the exemplary embodiment, the elastic half-shell 10 further includes a plurality of reinforcements 50. Each reinforcing portion 50 has a columnar shape extending from the annular portion 41 in a direction parallel to the first direction D1. The reinforcing portions 50 of the two elastic half-shells 10 are in contact with each other along the first direction D1. The reinforcing part is arranged to be beneficial to improving the deformation resistance of the integral structure of the insulating sheath. But is not limited thereto, in other exemplary embodiments, the deformation resistance may be increased by increasing the thickness of the partial structure.

It should be understood that although the present disclosure has been described in terms of various embodiments, not every embodiment is provided with a separate technical solution, and this description is for clarity only, and those skilled in the art should consider the disclosure as a whole, and the technical solutions in the various embodiments may be combined appropriately to form other embodiments that will be understood by those skilled in the art.

The above list of detailed descriptions is only specific to practical examples of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications, such as combinations, divisions or repetitions of features, without departing from the technical spirit of the present invention are included in the scope of the present invention.

Claims

1. Insulating sheath for a busbar joint, characterized in that it comprises two elastic half-shells (10) mutually covering along a first direction (D1), two of said elastic half-shells (10) being able to enclose a housing cavity (70), each of said elastic half-shells (10) comprising a plurality of trimmings (20), the trimmings (20) of two of said elastic half-shells (10) being joined along said first direction (D1), the two interengaged trimmings (20) being intended to close a passage of said housing cavity (70) into which a busbar can be inserted along an insertion direction (S), said insertion direction (S) being perpendicular to said first direction (D1), each of said trimmings (20) comprising:

an engaging portion (21) provided at one end of the cutout portion (20) in the first direction (D1) for engaging the engaging portion (21) of the other elastic half-shell (10), and

an extension (23) extending from the engagement portion (21) in the direction of the top of the elastic half-shell (10) along the corresponding insertion direction (S);

the projection of the cutting section (20) on a plane perpendicular to the insertion direction (S) is rectangular.

2. Insulating sheath according to claim 1, characterized in that the elastic half-shell (10) has a first cut-out groove (11) along the edge of the cut-out (20).

3. Insulating sheath according to claim 1, characterized in that the extension (23) is flat.

4. Insulating sheath according to claim 1, characterized in that the elastic half-shell (10) is provided with four said cutting portions (20), the four cutting portions (20) being distributed along a circumference (R) of the elastic half-shell (10) perpendicular to the first direction (D1), the insertion directions (S) corresponding to each adjacent two cutting portions (20) being mutually perpendicular.

5. Insulating sheath according to claim 4, characterized in that each elastic half-shell (10) is further provided with four connecting portions (30), four of said connecting portions (30) and four of said cutting portions (20) being alternately connected along a circumferential direction (R) perpendicular to said first direction (D1); each connecting portion (30) has a fixing portion (31), and the fixing portion (31) is in a flat plate shape perpendicular to the first direction (D1) and is attached to one fixing portion (31) of the other elastic half-shell (10).

6. The insulating sheath according to claim 5, further comprising four fixing members (80), each of the fixing members (80) penetrating the two fixing portions (31) to be fitted to each other to fix the relative positions of the two fixing portions (31).

7. The insulating sheath according to claim 5, characterized in that each elastic half-shell (10) further comprises a top portion (40) located on one side of the housing cavity (70) in the first direction (D1) and connecting the cut-out portion (20) and the connecting portion (30) along an outer edge of the circumferential direction (R) perpendicular to the first direction (D1), the top portion (40) comprising:

an annular portion (41) having a flat plate shape perpendicular to the first direction (D1), an outer edge of the annular portion (41) connecting the cutting portion (20) and the connecting portion (30), and

and a limiting part (42) connected with the inner edge of the annular part (41) and provided with a concave cavity (43) extending along the first direction (D1) so as to accommodate the fixing part of the conductive bar connector.

8. Insulating sheath according to claim 7, characterized in that the annular portion (41) is provided with a second cutting groove (12) surrounding the limit portion (42).

9. Insulating sheath according to claim 7, characterized in that the elastic half-shell (10) further comprises a plurality of stiffening portions (50), each stiffening portion (50) being in the shape of a column extending from the annular portion (41) in a direction parallel to the first direction (D1), the stiffening portions (50) of two elastic half-shells (10) being in contact with each other in the first direction (D1).

10. The insulating sheath of claim 1, wherein the conductive bars are copper bars.