CN220065536U

CN220065536U - Auxiliary isolation assembly for a switchgear and switchgear

Info

Publication number: CN220065536U
Application number: CN202321610637.3U
Authority: CN
Inventors: 季雪峰; 尤文玉; 庄秧秧; 高晓亮
Original assignee: Schneider Electric Industries SAS
Current assignee: Schneider Electric Industries SAS
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-11-21
Anticipated expiration: 2033-06-21

Abstract

According to embodiments of the present disclosure, an auxiliary isolation assembly for a switchgear and a switchgear are provided. The auxiliary isolation assembly includes: an isolation part arranged between a mechanism fixing plate and a user operation panel of the switching device and at least partially surrounding the outside of a rotary driving block of the switching device, adapted to establish insulation isolation between the mechanism fixing plate and the user operation panel; and at least one fixing portion disposed on a side wall of the partition portion and configured to fix the partition portion and the mechanism fixing plate along a normal direction of the mechanism fixing plate, the fixing portion including a clamping plate coupled to the partition portion and adapted to enter a clamping groove of the mechanism fixing plate along an installation direction to be coupled with the mechanism fixing plate. Thus, on the one hand, the insulation performance between the mechanism fixing plate and the user panel can be improved, and on the other hand, the stability of the coupling of the rotary driving block on the surface of the mechanism fixing plate can be improved.

Description

Auxiliary isolation assembly for a switchgear and switchgear

Technical Field

Example embodiments of the present disclosure relate generally to the field of switching devices, and in particular, to an auxiliary isolation assembly for a switching device and a switching device.

Background

Disconnectors are a common type of power transmission and control device. The method is widely applied to occasions such as substations, power plants, transmission lines, distribution rooms and the like in the power system so as to realize switching, isolation and protection of circuits.

The small-size isolating switch has the characteristics of small occupied working space, simple and convenient installation, high compatibility, and the like in the switch cabinet, so that the isolating switch is widely applied, however, the small-size isolating switch has a compact internal space, and therefore, higher requirements on the insulating property are also provided.

Disclosure of Invention

In a first aspect of the present disclosure, an auxiliary isolation assembly for a switchgear is provided. The auxiliary isolation assembly includes: an isolation part arranged between a mechanism fixing plate and a user operation panel of the switching device and at least partially surrounding the outside of a rotary driving block of the switching device, adapted to establish insulation isolation between the mechanism fixing plate and the user operation panel; and at least one fixing portion disposed on a side wall of the partition portion and configured to fix the partition portion and the mechanism fixing plate along a normal direction of the mechanism fixing plate, the fixing portion including a clamping plate coupled to the partition portion and adapted to enter a clamping groove of the mechanism fixing plate along an installation direction to be coupled with the mechanism fixing plate.

In some embodiments, the mounting direction is arranged parallel to the plane of the mechanism fixing plate.

In some embodiments, the clamping plate is adapted to enter the clamping groove in the mounting direction to be clamped with the mounting plate of the mechanism fixing plate.

In some embodiments, the spacer is configured to couple with a mount of the rotary drive block.

In some embodiments, the spacer is integrally formed with the mount.

In some embodiments, the spacer is annular in cross-section in the radial direction.

In some embodiments, the at least one fixation portion comprises two fixation portions arranged opposite each other in a radial direction of the spacer portion.

In a second aspect of the present disclosure, a switching device is provided. The switching device includes: a mechanism fixing plate; a rotation driving block arranged to be rotatably connected with the mechanism fixing plate; a user operation panel arranged to at least partially shield the rotary drive block; and an auxiliary isolating assembly provided in the first aspect of the present disclosure, disposed between the mechanism fixing plate and the user operation panel, and adapted to establish insulation isolation between the mechanism fixing plate and the user operation panel.

In some embodiments, the user operation panel includes: and the isolation groove is arranged on one side of the user operation panel facing the isolation part and is suitable for embedding one end of the isolation part facing the user operation panel.

In some embodiments, a gap of not less than a threshold value is left between a side of the isolation portion facing the rotary drive block and a side wall of the isolation groove.

In some embodiments, the mechanism fixing plate includes: a mounting plate; and a clamping groove arranged on the mounting plate, wherein the clamping plate of the auxiliary isolation assembly is suitable for entering the clamping groove along the mounting direction and being clamped with the mounting plate.

By the aid of the auxiliary isolating device, the creepage distance of an electric arc between the mechanism fixing plate and the user operation panel can be prolonged, and therefore the insulating performance of the switch device is improved. On the other hand, the auxiliary isolating device couples the rotary driving block on the mechanism fixing plate, so that the internal structure of the switch device is simplified, and the coupling stability of the rotary driving block and the mechanism fixing plate is improved.

It should be understood that what is described in this section of the disclosure is not intended to limit key features or essential features of the embodiments of the disclosure, nor is it intended to limit the scope of the disclosure. Other features of the present disclosure will become apparent from the following description.

Drawings

The above and other features, advantages and aspects of embodiments of the present disclosure will become more apparent by reference to the following detailed description when taken in conjunction with the accompanying drawings. In the drawings, wherein like or similar reference numerals denote like or similar elements, in which:

fig. 1 is a schematic view showing an internal structure of a conventional scheme in which a switching device conceals a user operation panel;

FIG. 2 shows a schematic overall structure of a switching device of an embodiment of the present disclosure;

FIG. 3 illustrates a schematic cross-sectional view of a switching device of an embodiment of the present disclosure along line A-A in FIG. 2;

FIG. 4 illustrates an overall structural schematic of an auxiliary isolation assembly and a rotary drive block of an embodiment of the present disclosure;

fig. 5 is a schematic view showing an internal structure of a switching device according to an embodiment of the present disclosure after hiding a user operation panel;

FIG. 6 illustrates a schematic cross-sectional view of a switching device of an embodiment of the present disclosure along line B-B in FIG. 5; and

fig. 7 shows a schematic view of a creepage path of an arc at an isolation slot portion in a switchgear of an embodiment of the present disclosure.

Detailed Description

Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While certain embodiments of the present disclosure have been illustrated in the accompanying drawings, it is to be understood that the present disclosure may be embodied in various forms and should not be construed as limited to the embodiments set forth herein, but rather, these embodiments are provided so that this disclosure will be more thorough and complete. It should be understood that the drawings and embodiments of the present disclosure are for illustration purposes only and are not intended to limit the scope of the present disclosure.

In describing embodiments of the present disclosure, the term "comprising" and its like should be taken to be open-ended, i.e., including, but not limited to. The term "based on" should be understood as "based at least in part on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The term "some embodiments" should be understood as "at least some embodiments". Other explicit and implicit definitions are also possible below. The terms "first," "second," and the like, may refer to different or the same object. Other explicit and implicit definitions are also possible below.

As mentioned briefly above, the small-sized isolating switch has high insulation difficulty due to its compact internal space. For some small-volume, high-voltage, direct-current disconnectors, in some wet or high-altitude areas, the arc on the side of the disconnector mechanism tends to climb to the operating side, thus creating a safety hazard. The existing isolating switch mainly comprises a main body and a user operation panel. The body has disposed therein the mechanical structure and electronic components necessary for performing the function of the disconnector. Fig. 1 is a schematic view showing the internal structure of a switch device in a conventional scheme after hiding a user operation panel. As shown in fig. 1, a mechanism fixing plate 1 is coupled to a side of a switchgear main body facing a user operation panel in a conventional scheme, and the mechanism fixing plate 1 shields a mechanical structure and an electronic component in the main body to provide protection. An actuating mechanism for operating the isolating switch is further arranged on the mechanism fixing plate 1, and the actuating mechanism can act, such as sliding, rotating, swinging and the like, relative to the mechanism fixing plate 1 so as to control the on-off of the isolating switch. Fig. 1 illustrates a rotary example. The actuator may be a rotary drive block 2, the rotary drive block 2 comprising a fixed member 21 coupled to the mechanism fixing plate 1 and a rotary member 22 pivotally arranged with respect to the fixed member 21, the fixed member 21 being coupled to the mechanism fixing plate 1, the rotary member 22 controlling at least the on-off of the isolating switch by rotation about its own axis. The pressing piece 6 is further arranged on the isolating piece, the pressing piece 6 is located on one side, away from the mechanism fixing plate 1, of the isolating room, two ends of the pressing piece 6 are respectively coupled with the mechanism fixing plate 1 through fasteners, and accordingly the pressing piece 6 compresses and fixes the isolating room on the mechanism fixing plate 1. The user operation panel is fastened to the mechanism fixing plate 1, and a through hole is formed in the user operation panel to accommodate at least the rotary piece 22 of the rotary driving block 2 to pass through.

However, such a fixing structure easily causes a creepage distance or an electric gap between the mechanism fixing plate 1 and the user operation panel to be shortened, thereby affecting the insulating performance of the user panel.

For example, since the coupling stability between the fixing member 21 and the mechanism fixing plate 1 largely depends on the strength of the pressing sheet 6 itself and the coupling stability between the pressing sheet 6 and the mechanism fixing plate 1. Therefore, the pressing sheet 6 is made of metal in some isolating switches. This further shortens the electrical gap between the user operation panel 3 and the mechanism fixing plate 1, thereby making it more difficult for the small-sized disconnecting switch to secure the insulation requirement.

Embodiments of the present disclosure propose an auxiliary isolation assembly for a switchgear to solve or at least partially solve the above-mentioned and other potential problems present in conventional approaches. According to various embodiments of the present disclosure, the auxiliary isolating member is disposed between the mechanism fixing plate 1 and the user operation panel 3 of the switching device, and thus the insulation performance between the mechanism fixing plate 1 and the user operation panel 3 can be improved. In addition, the auxiliary isolating component is coupled with the mechanism fixing plate 1 through the fixing part 5 of the auxiliary isolating component, so that the creepage distance between the mechanism fixing plate 1 and the user operation panel 3 can be prolonged, and the insulating performance of the switching device is further improved.

Fig. 2 shows a schematic overall structure of a switching device according to an embodiment of the present disclosure, and fig. 3 shows a schematic cross-sectional view of the switching device according to an embodiment of the present disclosure along a line A-A in fig. 2. As shown in fig. 2 and 3, generally, a switching device provided according to an embodiment of the present disclosure includes a main body to which a mechanism fixing plate 1 is coupled at a side facing a user, the mechanism fixing plate 1 being configured to shield and protect key parts within the main body. A rotation driving block 2 is arranged on the mechanism fixing plate 1. The rotary drive block 2 includes a fixed member 21 coupled to the mechanism fixing plate 1 and a rotary member 22 rotatably connected to the fixed member 21. The manner of coupling the drive block to the mechanism fixing plate 1 will be described below. One end of the rotating member 22 facing the main body is coupled with an actuating mechanism in the main body, so that the rotating member 22 can rotate to drive the actuating mechanism in the main body to actuate, thereby controlling the on-off of the switching device. The side of the mechanism fixing plate 1 facing the user is also buckled with a user operation panel 3, and a cavity is formed in the side of the user operation panel 3 facing the mechanism fixing plate 1 and is at least used for accommodating the rotary driving block 2. The user operation panel 3 is also provided with a through hole 32. The rotary member 22 passes through the through hole 32 and protrudes from the side of the user operation panel 3 facing away from the mechanism fixing plate 1. Thus, when the user operation panel 3 is fastened on the surface of the mechanism fixing plate 1, the user can control the on-off of the switching device by operating the rotating member 22. An isolation assembly is further provided between the mechanism fixing plate 1 and the user operation panel 3 for providing insulation and isolation between the mechanism fixing plate 1 and the user operation panel 3.

Fig. 3 shows a schematic diagram of the overall structure of the auxiliary isolation assembly and the rotary drive block according to an embodiment of the present disclosure. As shown in fig. 3, in particular, the insulation assembly comprises an insulation part 4 and at least one fixing part 5. The spacer 4 at least partially surrounds the outside of the rotary drive block 2. For example, in some embodiments, the spacer 4 is annular, and the spacer 4 is aligned with the rotating member 22 of the rotary drive block 2 in the axial direction. The isolating part 4 surrounds the outside of the rotary driving block 2 to isolate and protect the rotary member 22, reduce arc creepage to the rotary member 22, and reduce injury of a user due to electrification of the rotary member 22 when the rotary member 22 is used.

In some alternative embodiments, the partition 4 may be part-circular arc-shaped to fit into the space within the cavity.

One end of the isolation part 4 facing the mechanism fixing plate 1 is abutted on the mechanism fixing plate 1, and a distance between the side of the isolation part 4 facing the user operation panel 3 and the user panel is not smaller than a threshold value. For example, in some embodiments, the distance between the side of the partition 4 facing the user operation panel 3 and the user operation panel 3 may be 1mm, 0.8mm, or the like.

Fig. 5 is a schematic view showing an internal structure of the switchgear of the embodiment of the present disclosure after hiding a user operation panel, and fig. 6 is a schematic view showing a section of the switchgear of the embodiment of the present disclosure along line B-B in fig. 5. As shown in fig. 5 and 6, the auxiliary isolating assembly further comprises at least one fixing portion 5. At least one securing portion 5 is configured to couple with the mechanism securing plate 1 and secure the auxiliary isolating assembly with the mechanism securing plate 1 along a normal direction of the mechanism securing plate 1. The fixing portion 5 may include a catching plate 53 coupled to the partition portion 4. To facilitate coupling with the at least one fixing portion 5, the mechanism fixing plate 1 includes a catching groove 52. The catch plate 53 can be inserted into the catch groove 52 in the mounting direction. In some embodiments, the mechanism fixing plate 1 includes a mounting plate 51. The clamping groove 52 is clamped on the mounting plate 51, and the opening direction of the clamping groove 52 is parallel to the plane of the mechanism fixing plate 1. After the clamping plate 53 is clamped into the clamping groove 52 along the installation direction, the clamping plate 53 is clamped with the side wall of the clamping groove 52, so that the clamping groove 52 limits the displacement of the clamping plate 53 along the direction perpendicular to the mechanism fixing plate 1. In this way, the auxiliary isolating component is fixed to the mechanism fixing plate 1 along the normal direction of the mechanism fixing plate 1.

In addition, the clamping connection between the mounting plate 51 and the clamping plate 53 also prolongs the creepage distance in the switch device. Specifically, when the arc climbs from the mechanism fixing plate 1 to the user operation panel 3, the arc needs to bypass the surfaces of the clamping groove 52 and the clamping plate 53 and extend to the user operation panel 3 through the isolating part 4, which greatly prolongs the creepage path of the arc, and thus improves the insulation performance between the mechanism fixing plate 1 and the user operation panel 3 and the rotator 22.

In some embodiments, the mounting direction may be a circumferential direction about the axis of the rotary member 22, i.e. parallel to the plane in which the mechanism fixing plate 1 lies. After the isolation part 4 of the auxiliary isolation assembly is sleeved outside the rotary driving block 2, the auxiliary isolation assembly is rotated along the installation direction, so that the clamping plate 53 is clamped into the clamping groove 52, and the auxiliary isolation assembly is coupled with the mechanism fixing plate 1.

In some alternative embodiments, the mounting direction may also be a straight direction parallel to the plane of the mechanism fixing plate 1. After the auxiliary isolation assembly slides along the installation direction, the isolation part 4 slides to the outer side of the rotary driving block 2, and meanwhile, the clamping plate 53 is clamped into the clamping groove 52, and the auxiliary isolation assembly is coupled with the mechanism fixing plate 1.

In some embodiments, the fixing portions 5 may be provided in two, and the two fixing portions 5 are arranged on opposite sides of the partition wall in the radial direction of the rotary member 22. The two fixing portions 5 are arranged along the diagonal direction of the isolating portion 4, so that the stability of fixing the auxiliary isolating assembly with the mechanism fixing plate 1 can be improved.

In some embodiments, the mounting plate 51 may be integrally formed with the mechanism fixing plate 1, for example, the mounting plate 51 may be formed by sheet metal bending a portion of the mechanism fixing plate 1. In alternative embodiments, the mounting plate 51 may be manufactured separately from the mechanism fixing plate 1 and coupled to the mechanism fixing plate 1 by welding, bonding, or fastening such as bolts and nuts.

In some embodiments, the spacer 4 is coupled to the mount 21 of the rotary drive block 2. Specifically, the partition 4 is fitted over the outside of the fixing member 21 and the partition 4 is integrally formed with the fixing member 21. In other alternative embodiments, the fixing member 21 and the partition 4 may be coupled together by welding or bonding, or the like.

After the isolation part 4 is fixedly coupled with the rotary driving block 2, the rotary driving block 2 can be further coupled with the mechanism fixing plate 1 through the auxiliary isolation assembly, so that the structures of the rotary driving block 2 and the mechanism fixing plate 1 are optimized, and the internal space of the switching device is saved.

In order to further extend the creepage distance between the mechanism fixing plate 1 and the user operation panel 3 and the rotator 22, the surface of the user operation panel 3 facing the mechanism fixing plate 1 is further provided with a separation groove 31, and the separation part 4 is embedded in the separation groove 31 toward the end of the user operation panel 3. The isolation groove 31 may be annular in shape as a whole, and the isolation groove 31 is aligned on the axis with the through hole 32 on the user operation panel 3. The side wall of the partition 4 on the side facing the user operation panel 3 is close to the bottom wall of the partition groove 31. In some embodiments, the spacer 4 and the bottom wall of the spacer groove 31 have a gap therebetween of not more than 1mm, so that the user operation panel 3 and the auxiliary spacer assembly can be stably coupled without interfering with each other. Meanwhile, a gap is reserved between the side wall of the isolation part 4 facing the rotary driving block 2 and the inner ring side wall of the isolation groove 31, for example, the gap can be 1mm, 1.5mm and the like, so that an electric arc can climb on the surface of the isolation part 4 in the isolation groove 31, the creepage distance of the electric arc is prolonged, and the insulation performance between the mechanism fixing plate 1 and the user operation panel 3 is improved.

Fig. 7 shows a schematic view of a creepage path of an arc at an isolation slot portion in a switchgear of an embodiment of the present disclosure, wherein the creepage path of the arc at the isolation slot portion is shown with dashed arrows. As shown in fig. 7, the arc climbs to the isolation groove 31 on the outside of the isolation part 4, bypasses the end of the isolation part 4 toward the user operation panel 3, and continues to climb on the inner wall of the isolation part 4. Thereby the creepage distance of the arc is prolonged, and the safety performance of the user operation panel 3 is improved.

The foregoing description of implementations of the present disclosure has been provided for illustrative purposes, is not exhaustive, and is not limited to the implementations disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the various implementations described. The terminology used herein was chosen in order to best explain the principles of each implementation, the practical application, or the improvement of technology in the marketplace, or to enable others of ordinary skill in the art to understand each implementation disclosed herein.

Claims

1. An auxiliary isolation assembly for a switchgear, comprising:

an isolation part (4) arranged between a mechanism fixing plate (1) and a user operation panel (3) of the switching device and at least partially surrounding the outside of a rotation driving block (2) of the switching device, and adapted to establish insulation isolation between the mechanism fixing plate (1) and the user operation panel (3); and

at least one fixing portion (5) arranged on a side wall of the partition portion (4) and configured to fix the partition portion (4) and the mechanism fixing plate (1) along a normal direction of the mechanism fixing plate (1), the fixing portion (5) comprising:

and a clamping plate (53) coupled to the isolation part (4) and adapted to enter a clamping groove (52) of the mechanism fixing plate (1) along the installation direction to be coupled with the mechanism fixing plate (1).

2. Auxiliary screen assembly according to claim 1, characterized in that the mounting direction is arranged parallel to the plane of the mechanism fixing plate (1).

3. Auxiliary isolation assembly according to claim 2, characterized in that the clamping plate (53) is adapted to enter the clamping groove (52) in the mounting direction to be clamped with the mounting plate (51) of the mechanism fixing plate (1).

4. A secondary isolation assembly according to any of claims 1-3, wherein the isolation portion (4) is configured to be coupled with a fixture (21) of the rotary drive block (2).

5. Auxiliary insulation assembly according to claim 4, characterized in that the insulation (4) is integrally formed with the fixing (21).

6. Auxiliary insulation assembly according to any of claims 1-3 and 5, characterized in that the section of the insulation (4) in radial direction is ring-shaped.

7. An auxiliary insulation assembly according to any one of claims 1-3 and 5, characterized in that the at least one fixing portion (5) comprises two fixing portions (5), the two fixing portions (5) being arranged opposite each other in the radial direction of the insulation portion (4).

8. A switching device, comprising:

a mechanism fixing plate (1);

a rotary drive block (2) arranged in rotary connection with the mechanism fixing plate (1);

a user operation panel (3) arranged to at least partially shield the rotary drive block (2); and

auxiliary isolating assembly according to any of claims 1-7, arranged between the mechanism fixing plate (1) and the user operating panel (3), and adapted to establish an insulating isolation between the mechanism fixing plate (1) and the user operating panel (3).

9. Switching device according to claim 8, characterized in that the user operation panel (3) comprises:

and an isolation groove (31), wherein the isolation groove (31) is arranged on one side of the user operation panel (3) facing the isolation part (4) and is suitable for embedding one end of the isolation part (4) facing the user operation panel (3).

10. Switching device according to claim 9, characterized in that a gap of not less than a threshold value is left between the side of the partition (4) facing the rotary drive block (2) and the side wall of the partition groove (31).

11. Switching device according to any one of claims 8-10, characterized in that the mechanism fixing plate (1) comprises:

a mounting plate (51); and

a clamping groove (52) arranged on the mounting plate (51) and

wherein the clamping plate (53) of the auxiliary isolation assembly is suitable for entering the clamping groove (52) along the installation direction and is clamped with the mounting plate (51).