Voltage-sharing connecting device and switch cabinet

Abstract

The utility model belongs to the technical field of electrical equipment, and discloses a voltage-sharing connecting device and a switch cabinet. The voltage-sharing connecting device comprises a voltage-sharing rod with conductive performance, the outer surface of the voltage-sharing rod is smooth, and a first connecting part and a second connecting part are arranged in the voltage-sharing rod; the first connecting part comprises a first slot and a fastening part, the first slot is in plug-in connection with a conductive column of the incoming and outgoing line sleeve, the fastening part is used for being connected with an electric connecting piece, the electric connecting piece is used for fixing the conductive column in the first slot, and the electric connecting piece is arranged in the uniformizing rod; the second connecting part comprises a second slot, and the second slot is electrically connected with one end of the in-out bus in an inserted mode. According to the voltage-sharing connecting device, the connection between the incoming and outgoing line sleeve and the incoming and outgoing bus is realized, the electric field at the joint of the incoming and outgoing line sleeve and the incoming and outgoing bus can be equalized, and the insulating property of the switch cabinet is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to electrical equipment technical field especially relates to a kind of voltage-sharing connecting device and switch cabinet. BACKGROUND

[0002] In switch cabinet, the incoming and outgoing line bushing on cabinet body is generally connected with incoming and outgoing circular busbar by bolt connection mode.Specifically, to facilitate connection, the connecting part of incoming and outgoing circular busbar needs to be die-cast into a plane, and a through hole is formed in the plane, so that the bolt is screwed with the conductive column on the through hole and the incoming and outgoing line bushing to realize the connection between the incoming and outgoing circular busbar and the incoming and outgoing line bushing. This connection mode needs to process the connecting part of the incoming and outgoing circular busbar, which is time-consuming and laborious. Moreover, the end of the processed incoming and outgoing circular busbar and the end face of the bolt both have many sharp corners, which leads to large electric field distortion at this point, and this point is prone to discharge to the side plate or bottom plate of the switch cabinet close to it during the operation of the switch cabinet, which has insulation risks.

[0003] Therefore, it is urgent to provide a voltage-sharing connecting device and switch cabinet to solve the above technical problems. SUMMARY

[0004] According to one aspect of the utility model, the utility model provides a kind of voltage-sharing connecting device, while realizing the connection between incoming and outgoing line bushing and incoming and outgoing busbar, it can evenly incoming and outgoing line bushing and the electric field of the connecting part of incoming and outgoing busbar, improve the insulation performance of switch cabinet.

[0005] To achieve this purpose, the utility model adopts the following technical solutions:

[0006] The voltage-sharing connecting device is used for connecting incoming and outgoing line bushing and incoming and outgoing busbar, and includes a voltage-sharing rod with conductive performance, the outer surface of the voltage-sharing rod is smooth, and the voltage-sharing rod is provided with a first connecting part and a second connecting part inside;

[0007] The first connecting part includes a first slot and a fastening part, the first slot is inserted with the conductive column of the incoming and outgoing line bushing, and the fastening part is used to be connected with an electric connector, the electric connector is used to fix the conductive column in the first slot, and the electric connector is placed in the voltage-sharing rod; The second connecting part includes a second slot, and the second slot is inserted with one end of the incoming and outgoing busbar to be electrically connected.

[0008] Optionally, an annular groove is provided on the inner circumferential wall of the second slot, and an elastic snap ring with conductive performance is installed in the annular groove, and the elastic snap ring is elastically pressed against the outer circumferential wall of the incoming and outgoing busbar.

[0009] Optionally, a plurality of the annular grooves are arranged along the axial direction of the second slot, and one of the elastic snap rings is arranged in each of the annular grooves.

[0010] Optionally, a first circular arc transition section is arranged on the equalizing rod at the outer edge of the opening of the first slot, and a second circular arc transition section is arranged on the equalizing rod at the outer edge of the opening of the second slot.

[0011] Optionally, the fastening part is a through hole in communication with the first slot, and the electric connecting piece is arranged through the through hole and connected with the conductive column.

[0012] Optionally, the first slot, the through hole and the second slot are coaxially arranged, the through hole is arranged between the first slot and the second slot, and the end of the electric connecting piece, which is not connected with the conductive column, is arranged at the bottom of the second slot.

[0013] Optionally, the equalizing rod is in the shape of an ellipsoid.

[0014] Optionally, the end of the through hole, which is away from the first slot, is provided with a counterbore, the counterbore, the through hole and the first slot are coaxially arranged and penetrate through the equalizing rod, the end of the electric connecting piece, which is not connected with the conductive column, is arranged in the counterbore, and the axis of the second slot is perpendicular to the axis of the first slot.

[0015] Optionally, the bottom of the second slot is provided with a threaded hole in communication with the second slot, one end of the incoming and outgoing bus is provided with an external thread, and one end of the incoming and outgoing bus is connected with the threaded hole through the external thread.

[0016] Optionally, the equalizing rod comprises a cylindrical structure and a hemispherical structure which are connected smoothly, the second slot is arranged on the cylindrical structure and coaxially arranged with the cylindrical structure, and the first slot, the through hole and the counterbore are arranged between the bottom of the second slot and the bottom of the hemispherical structure.

[0017] According to another aspect of the utility model, the utility model also provides a switch cabinet, including cabinet, incoming and outgoing line sleeve, incoming and outgoing bus and the equalizing connecting device of any one of the above technical schemes, the incoming and outgoing line sleeve is installed on the lateral wall of the cabinet, and the equalizing connecting device connects the incoming and outgoing line sleeve with the incoming and outgoing bus.

[0018] The utility model has the advantages of:

[0019] The utility model provides a kind of voltage-sharing connecting device, including the voltage-sharing rod with the electrically conductive performance, first connecting part and second connecting part are equipped in voltage-sharing rod. When using the voltage-sharing connecting device to connect incoming and outgoing line bushing and incoming and outgoing bus, first slot on first connecting part is inserted on the electrically conductive column of incoming and outgoing line bushing first, realize pre-fixing, then using electric connector, electrically conductive column is fixed in first slot, realize the electric connection of electrically conductive column and voltage-sharing connecting device, finally, the end of incoming and outgoing bus is inserted in the second slot of second connecting part, the connection between incoming and outgoing line bushing and incoming and outgoing bus can be realized. By setting first slot and electrically conductive column pre-connection, the assembly difficulty between electrically conductive column and voltage-sharing rod can be reduced;The connection of incoming and outgoing bus and voltage-sharing rod is realized by the way of incoming and outgoing bus and second slot insertion, simple structure, easy to install and disassemble, conducive to improving the assembly and disassembly efficiency of incoming and outgoing bus.

[0020] And, setting electric connector is placed in voltage-sharing rod, so that voltage-sharing rod can be wrapped to electric connector, while the outer surface of voltage-sharing rod is smoothly arranged, avoid the existence of sharp corner at the connection of incoming and outgoing line bushing and incoming and outgoing bus, and then the electric field at the connection of incoming and outgoing line bushing and incoming and outgoing bus is reached, the risk of discharge of the side plate or bottom plate of the switch cabinet close to it is reduced, and the insulation performance of the switch cabinet is improved.

[0021] The utility model also provides a kind of switch cabinet, including cabinet, incoming and outgoing line bushing, incoming and outgoing bus and above-mentioned voltage-sharing connecting device. The switch cabinet is because using above-mentioned voltage-sharing connecting device, and insulation performance and work reliability are all better. ACCURACY

[0022] In order to more clearly illustrate the technical scheme in the embodiment of the utility model, the drawings needed to be used in the embodiment of the utility model will be simply introduced as follows, and obviously, the drawings in the following description are only some embodiments of the utility model, and other drawings can be obtained according to the content of the embodiment of the utility model and these drawings without creating creative labor for those skilled in the art.

[0023] Figure 1 It is the assembly view of voltage-sharing connecting device, incoming and outgoing line bushing and incoming and outgoing bus provided by the utility model embodiment one, and it is the sectional view of voltage-sharing connecting device provided by the utility model embodiment one;

[0024] Figure 2 It is the sectional view of voltage-sharing connecting device provided by the utility model embodiment one;

[0025] Figure 3 It is the structural schematic view of voltage-sharing connecting device provided by the utility model embodiment one;

[0026] Figure 4is the assembly view of the voltage-sharing connecting device, the incoming and outgoing line sleeve and the incoming and outgoing bus provided by the second embodiment of the utility model;

[0027] Figure 5 is the assembly view of the voltage-sharing connecting device provided by the second embodiment of the utility model;

[0028] Figure 6 is the structure schematic view of the voltage-sharing connecting device provided by the second embodiment of the utility model.

[0029] In the drawing,

[0030] 10, incoming and outgoing line sleeve; 11, conductive column; 20, incoming and outgoing bus; 30, cabinet body;

[0031] 100, voltage-sharing rod; 101, cylindrical structure; 102, hemispherical structure; 110, first connecting part; 111, first slot; 112, through hole; 120, second connecting part; 121, second slot; 122, elastic snap ring; 130, counterbore; 140, threaded hole;

[0032] 200, electric connecting piece. DETAILED DESCRIPTION

[0033] The utility model will be further explained in detail in combination with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the utility model, and not limited to the utility model. In addition, it should be noted that, in order to facilitate the description, only the part related to the utility model is shown in the drawings, not all structures.

[0034] In the description of the utility model, unless otherwise explicitly specified and limited, the terms "connected", "connected", "fixed" should be understood broadly, for example, it can be fixed connection, can also be detachable connection, or integral; it can be mechanical connection, can also be electrical connection; it can be directly connected, can also be indirectly connected through intermediate medium, can be the communication of two elements or the interaction of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] Example 1

[0038] This embodiment provides a voltage equalization connection device, which can equalize the electric field at the connection point between the incoming and outgoing bushings and the incoming and outgoing busbars while realizing the connection between the incoming and outgoing bushings and the incoming and outgoing busbars, thereby improving the insulation performance of the switchgear.

[0039] Specifically, such as Figures 1-3 As shown, the voltage equalization connection device includes a voltage equalization rod 100 with conductive properties and a smooth outer surface. The voltage equalization rod 100 has a first connecting portion 110 and a second connecting portion 120. The first connecting portion 110 includes a first slot 111 and a fastening portion. The first slot 111 is inserted into the conductive post 11 of the inlet / outlet sleeve 10. The fastening portion is used to connect to an electrical connector 200, which is used to fix the conductive post 11 in the first slot and is placed inside the voltage equalization rod 100. The second connecting portion 120 includes a second slot 121, which is inserted into and electrically connected to one end of the inlet / outlet busbar 20.

[0040] The specific steps for connecting the inlet / outlet bushing 10 and the inlet / outlet busbar 20 using this equalizing connection device are as follows:

[0041] First, the equalizing rod 100 is inserted into the conductive post 11 of the inlet / outlet sleeve 10 through the first slot 111 on the first connecting part 110 to achieve pre-fixation of the equalizing rod 100. This setting can reduce the difficulty of connecting the electrical connector 200 and the conductive post 11 in the future.

[0042] Then, the electrical connector 200 is installed on the fastening part, and the electrical connector 200 is connected to the conductive post 11 in the first slot 111, thereby connecting the conductive post 11 to the equalizing rod 100. After the electrical connector 200 is installed, it is placed inside the equalizing rod 100 to prevent the electrical connector 200 from being exposed, thus preventing the sharp corners on the electrical connector 200 from causing battery distortion at the connection between the inlet / outlet sleeve 10 and the inlet / outlet busbar 20.

[0043] Finally, one end of the incoming / outgoing busbar 20 is inserted into the second slot 121 of the second connecting part 120 to achieve the connection between the incoming / outgoing sleeve 10 and the incoming / outgoing busbar 20. Connecting the incoming / outgoing busbar 20 to the voltage equalization connection device by inserting it into the second slot 121 is a simple structure that facilitates installation and disassembly, thus improving the efficiency of installing and removing the incoming / outgoing busbar 20.

[0044] It is worth noting that, since the equalizing rod 100 has conductive properties, after connecting the inlet / outlet bushing 10 and the inlet / outlet busbar 20 using the equalizing rod 100, a reliable electrical connection can be achieved between the conductive post 11 on the inlet / outlet bushing 10 and the inlet / outlet busbar 20 through the conductivity of the equalizing rod 100. Optionally, the material of the equalizing rod 100 can be a metallic material.

[0045] The voltage equalization connection device provided in this embodiment places the electrical connector 200 inside the voltage equalization rod 100, so that the voltage equalization rod 100 can wrap the electrical connector 200 to shield the electric field at the end of the electrical connector 200. At the same time, the outer surface of the voltage equalization rod 100 is made smooth to avoid sharp corners at the connection between the inlet / outlet bushing 10 and the inlet / outlet busbar 20. This achieves the purpose of equalizing the electric field at the connection between the inlet / outlet bushing 10 and the inlet / outlet busbar 20, reduces the risk of discharge to the side plate or bottom plate of the nearby switchgear, and thus improves the insulation performance of the switchgear.

[0046] Further, see also Figures 1-3 The inner peripheral wall of the second slot 121 is provided with an annular groove, and a conductive elastic retaining ring 122 is installed in the annular groove. The elastic retaining ring 122 elastically presses against the outer peripheral wall of the inlet / outlet busbar 20. By setting the conductive elastic retaining ring 122 to elastically press against the inlet / outlet busbar 20, the equalizing rod 100 can achieve a reliable electrical connection with the inlet / outlet busbar 20 through the elastic retaining ring 122, thereby improving the reliability of the equalizing rod 100 in achieving the electrical connection between the inlet / outlet bushing 10 and the inlet / outlet busbar 20.

[0047] Optionally, a plurality of annular grooves can be provided, and the plurality of annular grooves are arranged at intervals along the axial direction of the second slot 121, and one elastic snap ring 122 is arranged in each annular groove. By arranging a plurality of elastic snap rings 122, the reliability of the electrical connection between the access bus 20 and the grading rod 100 is further improved.

[0048] In the embodiment, the annular grooves are two. In other embodiments, the number of annular grooves can also be one, three, etc., and can be arranged according to actual needs, which is not limited in the present application.

[0049] Optionally, the elastic snap ring 122 can be an elastic contact finger. Since the structure of the elastic contact finger is prior art, the structure will not be described in detail.

[0050] Further, on the grading rod 100, a first circular arc transition section is arranged at the outer edge of the opening of the first slot 111. On the grading rod 100, a second circular arc transition section is arranged at the outer edge of the opening of the second slot 121. By arranging the first circular arc transition section and the second circular arc transition section, the uniformity of the electric field around the grading rod 100 can be further improved, and the risk of discharge from the connection between the access line bushing 10 and the access bus 20 to the side panel or the bottom panel of the cabinet 30 is further reduced.

[0051] Optionally, the first circular arc transition section can be formed by rounding the opening of the first slot 111. Of course, the second circular arc transition section can also be formed by rounding the opening of the second slot 121.

[0052] Optionally, the fastening part can be a through hole 112 in communication with the first slot 111, and the electrical connecting piece 200 is arranged through the through hole 112 and connected with the conductive column 11.

[0053] Optionally, the electrical connecting piece 200 can be a bolt, and the bolt is threadedly connected with one end of the conductive column 11 of the access line bushing 10. The structure is simple, the connection reliability is high, and the installation and disassembly are also convenient.

[0054] Further, continuing to refer to Figures 1-3 In the embodiment, the first slot 111, the through hole 112 and the second slot 121 are coaxially arranged, the through hole 112 is arranged between the first slot 111 and the second slot 121, and the end of the electrical connecting piece 200 not connected with the conductive column 11 is arranged at the bottom of the second slot 121. By coaxially arranging the first slot 111, the through hole 112 and the second slot 121, the processing is simple; and by arranging the end of the electrical connecting piece 200 not connected with the conductive column 11 in the second slot 121, the second slot 121 realizes "one thing with two uses", and the structure of the grading rod 100 is further simplified.

[0055] Optionally, in the embodiment, the equalizing rod 100 is in the shape of an ellipsoid, and is arranged such that the outer surface of the equalizing rod 100 is relatively smooth, and the effect of the uniform electric field is better.

[0056] Further, the axis of the equalizing rod 100 in the shape of an ellipsoid coincides with the axes of the first slot 111, the through hole 112 and the second slot 121, and is arranged such that the equalizing rod 100 is in an axisymmetric structure, which is convenient for processing and relatively beautiful.

[0057] Optionally, continuing to refer to Figure 1 In a possible embodiment, the incoming-outgoing line bushing 10 is installed on the side wall of the cabinet body 30 of the switch cabinet, the conductive column 11 of the incoming-outgoing line bushing 10 is arranged horizontally, and the axes of the first slot 111, the through hole 112 and the second slot 121 are also arranged horizontally.

[0058] Embodiment Two

[0059] The embodiment provides an equalizing connecting device which is substantially the same as the structure of the first embodiment and is only improved on the basis of the first embodiment. Therefore, only the differences between the two embodiments are described, and the same structure of the first embodiment is not described again.

[0060] In the embodiment, the same or corresponding technical features as those in the first embodiment are denoted by the same reference numerals.

[0061] Specifically, as shown in Figures 4-6 In the embodiment, the end of the through hole 112 away from the first slot 111 is provided with a counterbore 130, the counterbore 130, the through hole 112 and the first slot 111 are coaxially arranged and penetrate the equalizing rod 100, and the other end of the electric connecting piece 200 is connected with the conductive column 11 in the first slot 111 in sequence after the other end of the electric connecting piece 200 penetrates the counterbore 130 and the through hole 112, and the other end of the electric connecting piece 200 is arranged in the counterbore 130, so as to avoid that the other end of the electric connecting piece 200 is exposed outside and affects the uniformity of the electric field, and the structure is simple and convenient for processing.

[0062] It is worth noting that the diameter of the through hole 112 is smaller than the diameters of the first slot 111 and the counterbore 130, so as to facilitate fixing of the electric connecting piece 200.

[0063] Optionally, the axis of the second slot 121 can be arranged perpendicularly to the axis of the first slot 111, so as to facilitate vertical installation between the incoming-outgoing line bushing 10 and the incoming-outgoing bus 20.

[0064] In the embodiment, the axis of the second slot 121 coincides with the axis of the equalizing rod 100.

[0065] Further, the bottom of the second slot 121 is provided with a threaded hole 140 in communication with the threaded hole 140, and one end of the incoming and outgoing busbar 20 is provided with an external thread, and the one end of the incoming and outgoing busbar 20 is connected to the threaded hole 140 through the external thread. In this way, the connection strength between the incoming and outgoing busbar 20 and the grading rod 100 can be improved, the shaking of the incoming and outgoing busbar 20 caused by the dynamic stability effect of the current can be reduced, and the stability of the conductive loop between the incoming and outgoing bushing 10 and the incoming and outgoing busbar 20 can be improved.

[0066] It should be noted that according to the installation space, the external thread on the incoming and outgoing busbar 20 and the threaded hole 140 can not be completely tightened to ensure that the inner peripheral wall of the first slot 111 and the outer peripheral wall of the conductive column 11 are completely matched.

[0067] Further, referring to Figure 5 and Figure 6 , the grading rod 100 includes a cylindrical structure 101 and a hemispherical structure 102 connected smoothly, and the cylindrical structure 101 is provided with a second slot 121, and the second slot 121 is coaxially arranged on the cylindrical structure 101. The first slot 111, the through hole 112 and the counterbore 130 are located between the bottom of the second slot 121 and the bottom of the hemispherical structure 102. By arranging the grading rod 100 to include the cylindrical structure 101 and the hemispherical structure 102 connected smoothly, the outer surface of the grading rod 100 is relatively smooth, which is beneficial to improve the uniformity of the electric field around the grading rod 100.

[0068] Embodiment three

[0069] As shown in Figure 1 and Figure 4 , the embodiment provides a switch cabinet, which includes a cabinet body 30, an incoming and outgoing bushing 10, an incoming and outgoing busbar 20 and the grading connection device provided in the embodiment one or the embodiment two. The incoming and outgoing bushing 10 is installed on the side wall of the cabinet body 30, and the grading connection device connects the incoming and outgoing bushing 10 and the incoming and outgoing busbar 20.

[0070] The switch cabinet has good insulation performance and working reliability due to the use of the above-mentioned grading connection device.

[0071] Obviously, the above embodiments of the present application are only examples for clearly illustrating the present application, and are not intended to limit the implementation modes of the present application. For ordinary skilled in the art, various obvious changes, re-adjustments and replacements can be made without departing from the protection scope of the present application. Here, it is not necessary and impossible to enumerate all the implementation modes. Any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the claims of the present application.

Claims

1. An equalizing connection device for connecting an incoming and outgoing line bushing (10) to an incoming and outgoing busbar (20), characterized in that, The equalizing connection device comprises an equalizing rod (100) with electrically conductive performance, the outer surface of the equalizing rod (100) is smooth, and the equalizing rod (100) is internally provided with a first connecting part (110) and a second connecting part (120); The first connecting part (110) comprises a first slot (111) and a fastening part, the first slot (111) is inserted with the electrically conductive column (11) of the inlet and outlet line sleeve (10), the fastening part is used for being connected with an electric connector (200), the electric connector (200) is used for fixing the electrically conductive column (11) in the first slot (111), and the electric connector (200) is arranged in the equalizing rod (100); the second connecting part (120) comprises a second slot (121), and the second slot (121) is inserted and electrically connected with one end of the inlet and outlet bus (20).

2. The equalizing connection device according to claim 1, characterized in that An annular groove is arranged on the inner circumferential wall of the second slot (121), an elastic snap ring (122) with electrically conductive performance is arranged in the annular groove, and the elastic snap ring (122) is elastically pressed against the outer circumferential wall of the inlet and outlet bus (20).

3. The equalizing connection device according to claim 2, characterized in that A plurality of annular grooves are arranged, and the plurality of annular grooves are arranged in the axial direction of the second slot (121) and are spaced apart from each other, and one elastic snap ring (122) is arranged in each annular groove.

4. The equalizing connection device according to claim 1, characterized in that A first circular arc transition section is arranged at the outer edge of the opening of the first slot (111) on the equalizing rod (100), and a second circular arc transition section is arranged at the outer edge of the opening of the second slot (121) on the equalizing rod (100).

5. The equalizing connection device according to claim 1, characterized in that The fastening part is a through hole (112) in communication with the first slot (111), and the electric connector (200) is connected with the electrically conductive column (11) through the through hole (112).

6. The equalizing connection device according to claim 5, characterized in that The first slot (111), the through hole (112) and the second slot (121) are coaxially arranged, the through hole (112) is arranged between the first slot (111) and the second slot (121), and one end of the electric connector (200) not connected with the electrically conductive column (11) is arranged at the bottom of the second slot (121).

7. The equalizing connection device according to claim 6, characterized in that The equalizing rod (100) is in an ellipsoidal shape.

8. The equalizing connection device according to claim 5, characterized in that One end of the through hole (112) away from the first slot (111) is provided with a counterbore (130), the counterbore (130), the through hole (112) and the first slot (111) are coaxially arranged and penetrate through the equalizing rod (100), and one end of the electric connector (200) not connected with the electrically conductive column (11) is arranged in the counterbore (130); the axis of the second slot (121) is perpendicular to the axis of the first slot (111).

9. The equalizing connection device according to claim 8, characterized in that The bottom of the second slot (121) is provided with a threaded hole (140) in communication therewith, one end of the inlet and outlet bus (20) is provided with an external thread, and one end of the inlet and outlet bus (20) is connected with the threaded hole (140) through the external thread.

10. The equalizing connection device according to claim 8, characterized in that The equalizing rod (100) comprises a cylindrical structure (101) and a hemispherical structure (102) connected smoothly, the second slot (121) is arranged on the cylindrical structure (101), the first slot (111), the through hole (112) and the counterbore (130) are located between the bottom of the second slot (121) and the bottom of the hemispherical structure (102).

11. Switchgear cabinet, characterized in that The equalizing connecting device of any one of claims 1-10 is used in a switchgear, which comprises a cabinet (30), an incoming and outgoing line bushing (10), an incoming and outgoing bus (20), and the equalizing connecting device, the incoming and outgoing line bushing (10) is installed on the side wall of the cabinet (30), and the equalizing connecting device connects the incoming and outgoing line bushing (10) and the incoming and outgoing bus (20).

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