CN113363027A

CN113363027A - Insulating sheath for contact of conducting bar

Info

Publication number: CN113363027A
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: 2021-09-07
Anticipated expiration: 2041-06-10
Also published as: CN113363027B

Abstract

The insulating sheath of the contact of the conductor bar comprises two elastic half-shells (10) which cover each other in a first direction (D1). The two elastic half-shells can enclose a receiving chamber (70). Each resilient half-shell comprises a cutout (20), the cutouts of the two resilient half-shells being joined in a first direction. The two mutually engaging cutouts serve to close a passage of the receiving space, into which the conductor bar can be inserted in an insertion direction (S), wherein the insertion direction is perpendicular to the first direction. Each cutout portion includes an engaging portion (21) and an extending portion (23). The joint part is arranged at one end of the cutting part along the first direction and is used for being jointed with the joint part of the other elastic half shell. The extending portion gradually extends from the engaging portion along the insertion direction corresponding thereto toward the other end of the cutout portion along the first direction. The insulating sheath has high universality.

Description

Insulating sheath for contact of conducting bar

Technical Field

The invention relates to an insulating sheath, in particular to an insulating sheath for a contact of a conducting bar.

Background

A switchgear is an electrical device, which is widely used in an electric power system. Copper bars in the switch cabinet are generally used as electric energy transmission media. An insulating sheath is often installed at the copper bar lap joint of the switch cabinet to improve the insulating property of the switch cabinet. But the specifications of the copper bar connector are different according to different current grades. Therefore, in the prior art, the special insulating sheath is designed for the copper bar connectors with different specifications, so that the universality of the special insulating sheath is low.

Disclosure of Invention

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

The invention provides an insulating sheath of a contact of a conductive bar, which comprises two elastic half shells which cover each other along a first direction. The two elastic half-shells can enclose a receiving chamber. Each of the resilient half-shells includes at least one cutout, the cutouts of the two resilient half-shells being joined in a first direction. The two mutually engaging cutouts serve to close a passage of the receiving space, into which the conductor bar can be inserted in an insertion direction, wherein the insertion direction is perpendicular to the first direction. Each cutout 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 being jointed with the joint part of the other elastic half shell. The extending portion gradually extends from the engaging portion along the insertion direction corresponding thereto toward the other end of the cutout portion along the first direction.

The insulating sheath of the contact of the conductive bar can be properly cut according to the specification of the conductive bar so as to be suitable for the conductive bars with different specifications, and if a plurality of cutting parts are arranged, the insulating sheath can be suitable for the contact of the conductive bars with various types, thereby having higher universality. The slope type design of the extension part enables the cut part of the cutting part to be bent at a small angle to be attached to the conducting bar, so that the installation is convenient, and the slope type design is also beneficial to improving the cutting precision.

In another exemplary embodiment of the insulating sheath of the contact bank, the projection of the cutout onto a plane perpendicular to the insertion direction is rectangular. The cooperation of insulating sheath and conductive row can be made more compact by this.

In a further exemplary embodiment of the insulating sheath of the contact bank, the elastic half shell has a first cut-out along the edge of the cut-out. Thereby facilitating cutting.

In a further exemplary embodiment of the insulating sheath of the contact bank, the extension portion is flat and arranged parallel to a direction perpendicular to both the first direction and the insertion direction corresponding thereto. The structure is simple and the processing is convenient.

In a further exemplary embodiment of the insulating sheath of the contact bank, the elastic half shell is provided with four cutouts. The four cutouts are distributed along a circumferential direction of the elastic half shell perpendicular to the first direction. The inserting directions corresponding to every two adjacent cutting parts are mutually vertical. Thereby further improving the versatility of the insulating sheath.

In a further exemplary embodiment of the insulating sheath of the busbar joint, each elastic half-shell is further provided with four connecting portions. The four connecting portions and the four cutout 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 fastening of the resilient half-shells.

In a further exemplary embodiment of the insulating sheath of the busbar joint, the insulating sheath further comprises four fixing elements. Each fixing piece penetrates through the two fixing parts which are attached to each other to fix the relative positions of the two fixing parts. Thereby facilitating the fastening of the resilient half-shells.

In a further exemplary embodiment of the insulating sheath of the contact bank, each of the resilient half-shells further comprises a top portion which is located on one side of the receiving cavity in the first direction and which connects the cut-out portion and the connecting portion along a circumferential outer edge perpendicular to the first direction. The top portion includes an annular portion and a retaining portion. The annular portion is flat and 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 is provided with a concave cavity extending along the first direction so as to accommodate the fixing part of the conductive bar joint. 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 limiting portion. Thereby facilitating cutting.

In a further exemplary embodiment of the insulating sheath of the contact block, the resilient half-shell further comprises several reinforcements. Each of the reinforcing portions is in the shape of a column extending from the annular portion in a direction parallel to the first direction. The reinforcing portions of the two elastic half-shells contact each other in the first direction. Therefore, the deformation resistance of the integral structure of the insulating sheath is improved.

In a further exemplary embodiment of the insulating sheath of the contact terminal of the busbar, the busbar is a copper bar.

Drawings

The following drawings are only schematic illustrations and explanations of the present invention, and do not limit the scope of the present invention.

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

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

Fig. 3 is an exploded view of two resilient 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 a state of use of the insulating sheath shown in fig. 1.

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

Description of the reference symbols

10 elastomeric half shell

11 first cutting groove

12 second cutting groove

13 expanded hole

20 cutting part

21 joint part

23 extension part

30 connecting part

31 fixed part

40 top part

41 annular part

42 position limiting part

43 concave cavity

50 reinforcing part

70 accommodating cavity

80 fastener

91 copper bar

92 fixing part

93 outer structure

D1 first direction

R circumferential direction

S direction of insertion

Detailed Description

In order to more clearly understand the technical features, objects and effects of the present invention, embodiments of the present invention will now be described with reference to the accompanying drawings, in which the same reference numerals indicate the same or structurally similar but functionally identical elements.

"exemplary" means "serving as an example, instance, or illustration" herein, and any illustration, embodiment, or steps described as "exemplary" herein should not be construed as a preferred or advantageous alternative.

In this document, "first", "second", etc. do not mean their importance or order, etc., but merely mean that they are distinguished from each other so as to facilitate the description of the document.

For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product.

The conducting bar is used for connecting two or more components and parts to make the components and parts conduct electricity, a copper bar or an aluminum bar is generally adopted in the switch cabinet, and the copper bar is more widely used. For convenience of description, the copper bar is taken as an example for explanation. Fig. 1 is a schematic structural view of an exemplary embodiment of an insulating sheath of a copper busbar joint, and fig. 2 is a sectional view taken along line iv-iv in fig. 1. As shown in fig. 1 and 2, the insulating sheath of the copper busbar joint comprises two elastic half shells 10 which cover each other along a first direction D1, and the elastic half shells 10 are integrally cast with insulating rubber, for example. Fig. 3 is an exploded view of two resilient 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 space 70 when they are closed.

Each elastic half-shell 10 comprises at least one cutout 20, the number of cutouts 20 being set according to the actual requirements, for example 1, 2, 3 or 4, or even more. Because the copper bar connector has various types, such as a straight line type, an L type, a T type and a cross type, if there are four cutting portions 20, the cutting portions can be applied to the four types of copper bar connectors, which is very convenient. Therefore, the following description will be given taking an insulating sheath having four cutouts 20 as an example.

Fig. 4 is a top view of the insulating sheath shown in fig. 1, taken along a first direction D1, as shown in fig. 4, each elastic half shell 10 comprising four cutouts 20, four connecting portions 30 and a top portion 40. As shown in fig. 1 and 4, the four cutouts 20 are distributed along a circumferential direction R of the resilient half shell 10 perpendicular to the first direction D1. The four connecting portions 30 and the four cutouts 20 are alternately connected in a circumferential direction R perpendicular to the first direction D1. The top 40 is located on one side of the receiving cavity 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 cutouts 20 of the two elastic half shells 10 are joined in a one-to-one correspondence along the first direction D1. The two mutually engaging cutouts 20 serve to close off a passage of the accommodating cavity 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. That is, each two mutually engaging cutouts 20 have a corresponding insertion direction S, and when the copper bar is inserted into the accommodating cavity 70 along the insertion direction S, the copper bar is blocked by the two mutually engaging cutouts 20. As shown in fig. 4, in the present exemplary embodiment, the insertion directions S corresponding to each adjacent two cutouts 20 are perpendicular to each other.

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

While fig. 5 shows the cut-out portion viewed along the corresponding inserting direction S, as shown in fig. 5, in the present exemplary embodiment, the projection of the cut-out portion 20 on the plane perpendicular to the inserting direction S is a rectangle with the left and right opposite sides parallel to the first direction D1, and the rectangle shape matches with the cross-sectional shape of the copper bar, thereby making the fitting of the insulating sheath and the copper bar more compact, but not limited thereto. The elastic half shell 10 has a first cutting groove 11 along the edge of the cutout 20, by which cutting is 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 of the connecting portions 30 has one fixing portion 31, and the fixing portion 31 is shaped like a flat plate perpendicular to the first direction D1 and is attached to the 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 member 80 is inserted through the two attached fixing portions 31 to fix the relative positions of the two fixing portions 31. In the exemplary embodiment, the fixing member 80 is an opposite insertion rivet, but is not limited thereto, and the opposite insertion rivet is made of plastic, for example. In other exemplary embodiments, the two elastic half-shells 10 of the insulating sheath may also be fixed by other means, such as clamping or gluing.

When in use, the cutting part 20 to be cut is selected according to the type of the copper bar joint. 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 for cutting; 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 to be cut. One pair of cutouts 20 refers to two cutouts 20 that are joined to each other in the first direction D1. The uncut cutouts 20 can serve as a closed insulator. Then, the cutting portion 20 needs to be cut according to the thickness of the copper bar. Referring to fig. 5, the line is cut along the dotted line, and the cut size is selected according to the thickness of the copper bar, for example, the size of the cut section of the two cutting portions 20 that are joined to each other along the insertion direction S is substantially the same as or slightly larger than the size of the cross section of the copper bar, one of the two cutting portions 20 may be selected to cut according to actual conditions, or both of the two cutting portions may be selected to cut. Finally, the copper bar joint 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 the moment, the cut-off part of the cutting part 20 is bent 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 the copper busbar joint after the insulating sheath is mounted thereon, wherein the joint ends of the copper busbar 91 are fixed together by a fixing member 92, and the fixing member 92 can be a bolt. The copper bar joint shown in fig. 6 is in a straight line shape.

The insulating sheath of the contact of the conductive bar can be properly cut according to the specification of the conductive bar so as to be suitable for the conductive bars with different specifications, and if a plurality of cutting parts are arranged, the insulating sheath can also be suitable for the contact of the conductive bar with various types, such as a straight shape, an L shape, a T shape and a cross shape, thereby having higher universality. The slope type design of the extension part enables the cut part of the cutting part to be bent at a small angle to be attached to the conducting bar, so that the installation is convenient, and the slope type design is also beneficial to improving the cutting precision.

In the present exemplary embodiment, each elastic half-shell 10 comprises four cutouts 20, but this is not limiting, and in other exemplary embodiments, the number of cutouts 20 may also be adjusted as needed to provide suitable versatility. The number of cutouts 20 is for example one, in which case additional openings for inserting copper bars need to be provided in the insulating sheath. It will be appreciated that the greater the number of cutouts 20, the greater the versatility of the insulating sheath.

In the present exemplary embodiment, the top portion 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 connecting portion 30. The stopper 42 is connected to the inner edge of the annular portion 41 and has a cavity 43 (see fig. 2) extending along a first direction D1 for accommodating the fixing member 92 of the copper bar connector. As shown in fig. 6, the walls of the cavity 43 can limit the movement of the copper busbar joint relative to the insulating sheath by abutting against the fixing member 92 when in use, thereby contributing to an improved stability when in use.

As shown in fig. 4, in the exemplary embodiment, the ring portion 41 is provided with a second cut groove 12 surrounding the stopper portion 42. When an external structure 93 is required to connect the copper bar connectors in the first direction D1, as shown in fig. 7, it may be cut along the second cut 12 to form an expanded hole 13, and the external structure 93 may pass through the expanded hole 13 to connect the copper bar connectors.

As shown in fig. 2 and 3, in the exemplary embodiment, the elastic half-shell 10 also comprises several 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 resilient half-shells 10 are in mutual contact along the first direction D1. The arrangement of the reinforcing part is beneficial to improving the deformation resistance of the integral structure of the insulating sheath. Without being limited thereto, in other exemplary embodiments, the deformation resistance may also be improved by increasing the thickness of the partial structure.

It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications such as combinations, divisions or repetitions of features, which do not depart from the technical spirit of the present invention, should be included in the scope of the present invention.

Claims

1. Insulating sheath for electrical busbar splices, characterized in that it comprises two elastic half-shells (10) that cover each other along a first direction (D1), two elastic half-shells (10) being able to enclose a housing chamber (70), each elastic half-shell (10) comprising at least one cutout (20), the cutouts (20) of the two elastic half-shells (10) being engaged along the first direction (D1), two mutually engaged cutouts (20) being intended to close a passage of the housing chamber (70) into which an electrical busbar can be inserted along an insertion direction (S) perpendicular to the first direction (D1), each cutout (20) comprising:

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

an extension portion (23) gradually extending from the engagement portion (21) in the insertion direction (S) corresponding thereto toward the other end of the cutout portion (20) in the first direction (D1).

2. Insulating sheath according to claim 1, characterized in that the projection of the cut-out (20) on a plane perpendicular to the insertion direction (S) is rectangular.

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

4. Insulating sheath according to claim 1, characterized in that the extension (23) is flat and arranged parallel to a direction perpendicular to both the first direction (D1) and the insertion direction (S) to which it corresponds.

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

6. The insulating sheath according to claim 5, characterized in that each of the elastic half-shells (10) is further provided with four connecting portions (30), the four connecting portions (30) and the four cutouts (20) being alternately connected along a circumferential direction (R) perpendicular to the first direction (D1); each of the connecting portions (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 of the fixing portions (31) of the other of the elastic half shells (10).

7. The insulating sheath according to claim 6, characterized in that it further comprises four fixing elements (80), each fixing element (80) being arranged through two fixing portions (31) which are mutually attached so as to fix the relative positions of the two fixing portions (31).

8. The insulating sheath according to claim 6, characterized in that each of the elastic half-shells (10) further comprises a top portion (40) located on one side of the housing cavity (70) in the first direction (D1) and connecting the cutout 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 cutout portion (20) and the connecting portion (30), and

a retainer portion (42) connected to an inner edge of the ring portion (41) and having a cavity (43) extending in the first direction (D1) for receiving a securing member of a contact bar.

9. An insulating sheath according to claim 8, characterized in that the annular portion (41) is provided with a second cut groove (12) surrounding the limiting portion (42).

10. An insulating sheath according to claim 8, characterized in that the elastic half-shell (10) further comprises a plurality of reinforcing portions (50), each reinforcing portion (50) having a cylindrical 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) being in mutual contact along the first direction (D1).

11. The insulating sheath of claim 1, wherein the conductive row is a copper row.