Insulation baffle plate of isolation switch
By designing an insulating baffle that can be slidably connected to the baffle body and the stop assembly, the problem that the insulating baffle cannot adapt to different specifications of disconnecting switches in the prior art is solved, ensuring the stable installation of the insulating baffle and preventing the insulator from slipping out, thus improving the reliability and safety of the installation.
Patent Information
- Application Number
- CN202520213350.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-11
- Publication Date
- 2025-12-26
- Estimated Expiration
- 2035-02-11
AI Technical Summary
The existing insulating baffles of disconnect switches cannot be adapted to disconnect switches of different specifications, and after installation, the insulators are prone to slipping out of the fixing holes, resulting in unstable installation.
An insulating baffle is designed, comprising a slidably connected baffle body and a stop assembly. By rotating the stop assembly to switch states, it can adapt to different specifications of disconnecting switches and prevent the insulator from sliding out of the fixing hole when in the stop state.
It achieves compatibility with disconnect switches of different specifications, ensures stable installation of insulating baffles, prevents insulators from slipping out, and improves the reliability and safety of installation.
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Figure CN223729217U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the technical field of insulation protection of disconnectors, in particular to an insulation baffle of a disconnector. BACKGROUND
[0002] In the current distribution network system, high-voltage disconnectors and other devices play a crucial role. However, the traditional insulation baffles of disconnectors equipped with these devices have a series of significant problems. First, these insulation baffles cannot adapt to disconnectors of different specifications, and there is a low adaptability problem. After installation, the insulators of the disconnectors may slide out of the fixing holes of the insulation baffles, causing the insulation baffles to separate from the disconnectors. SUMMARY
[0003] The utility model provides an insulation baffle of a disconnector, which can adapt to disconnectors of different specifications. In the stop state of the stop assembly, the distance between the two stop pieces is less than the width of the insulator, preventing the insulator from sliding out of the corresponding fixing hole and ensuring the stability of the insulation baffle installation.
[0004] Other characteristics and advantages of the utility model will become apparent from the following detailed description, or will be learned partly by practice of the utility model.
[0005] According to an aspect of the utility model embodiment, an insulation baffle of a disconnector is provided, comprising:
[0006] Two baffle bodies, one of which is slidingly connected to the other; the baffle body is provided with a fixing hole for the insulator of the disconnector to pass through; the baffle body is provided with an opening, and the opening is communicated with the fixing hole from the edge of the baffle body;
[0007] Two stop assemblies, one of which is corresponding to the baffle body; the stop assembly has a stop state and an avoidance state, and the stop assembly comprises two stop pieces arranged on both sides of the opening; the stop piece rotates relative to the baffle body, so that the stop assembly switches between the stop state and the avoidance state;
[0008] In the stop state of the stop assembly, part of the stop piece extends into the opening, and the distance between the two stop pieces is less than the width of the insulator, preventing the insulator from sliding out of the corresponding fixing hole; in the avoidance state of the stop assembly, the distance between the two stop pieces is greater than or equal to the width of the insulator, so that the insulator can enter the fixing hole from the opening.
[0009] In an embodiment of the utility model, the insulating baffle further includes connecting shaft and reset torsional spring, the stop piece is rotatably connected with the baffle body through the connecting shaft, and the reset torsional spring is sleeved on the outside of the connecting shaft.
[0010] In an embodiment of the utility model, the stop piece includes stop section, one end of the stop section is rotatably connected with the baffle body, the other end extends into the opening, and the stop section extends towards the fixed hole.
[0011] In an embodiment of the utility model, the stop piece further includes limiting section connected with the stop section, the baffle body is provided with limiting block, and in the avoiding state of the stop assembly, the limiting block is abutted with the limiting section to limit the corresponding stop section from moving towards the direction away from another stop section.
[0012] In an embodiment of the utility model, the limiting section is a shell, the limiting section has oppositely arranged first inner wall and second inner wall, and the limiting block is located in the inside of the shell; in the stop state of the stop assembly, the limiting block is abutted with the first inner wall to limit the corresponding stop section from moving towards another stop section; and in the avoiding state of the stop assembly, the limiting block is abutted with the second inner wall to limit the corresponding stop section from moving towards the direction away from another stop section.
[0013] In an embodiment of the utility model, the included angle between the stop section and the limiting section of the same stop piece is greater than ninety degrees, and the limiting section extends towards the direction away from another stop piece.
[0014] In an embodiment of the utility model, the stop piece is located on the side of the baffle body away from another baffle body.
[0015] The utility model has at least the following advantages:
[0016] The two baffle bodies are slidably connected, the distance between the two openings can be adjusted to adapt to disconnectors of different specifications; in the avoiding state of the stop assembly, the distance between the two stop pieces is greater than or equal to the width of the insulator, so that the insulator can enter the fixed hole from the opening, and the insulator can be quickly installed; the stop piece rotates relative to the baffle body, so that the stop assembly is switched to the stop state, at this time, part of the stop piece extends into the opening, and the distance between the two stop pieces is less than the width of the insulator, so as to prevent the insulator from sliding out of the corresponding fixed hole, effectively prevent the insulator from sliding out of the fixed hole due to accident, and ensure the stability of the installation of the insulating baffle.
[0017] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory and are not restrictive of the application. BRIEF DESCRIPTION OF DRAWINGS
[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and serve to explain the principles of the application. It is readily apparent to one skilled in the art that the following described embodiments are only exemplary and that other embodiments can be realized based on these drawings without paying creative labor. In the drawings:
[0019] Figure 1 FIG. 1 is a structural schematic diagram of an insulating baffle of a disconnecting switch according to an embodiment of the application;
[0020] Figure 2 FIG. 1 is a structural schematic diagram of an insulating baffle of a disconnecting switch according to an embodiment of the application;
[0021] Figure 3 FIG. 1 is a structural schematic diagram of an insulating baffle of a disconnecting switch according to an embodiment of the application; Figure 2 FIG. 1 is a structural schematic diagram of an insulating baffle of a disconnecting switch according to an embodiment of the application;
[0022] Figure 4 FIG. 1 is a structural schematic diagram of an insulating baffle of a disconnecting switch according to an embodiment of the application;
[0023] Figure 5 FIG. 1 is a structural schematic diagram of an insulating baffle of a disconnecting switch according to an embodiment of the application;
[0024] REFERENCE NUMERALS
[0025] 100, baffle body; 110, fixing hole; 120, opening; 130, limiting block; 140, first baffle;
[0026] 150, second baffle;
[0027] 200, stop component; 210, stop piece; 211, stop section; 212, limiting section; 212a, first inner wall;
[0028] 212b, second inner wall; 220, first stop piece; 230, second stop piece;
[0029] 300, connecting shaft;
[0030] 400, reset torsional spring;
[0031] 500, iron stand;
[0032] 600, main body of disconnecting switch;
[0033] 700, insulator. DETAILED DESCRIPTION
[0034] Example implementations are now described in greater detail with reference to the figures. Like reference numerals can be used to denote like elements throughout the description. The example implementations can be implemented in numerous ways, and are not limited to the examples described herein. Rather, examples are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the example implementations to those skilled in the art.
[0035] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to give a thorough understanding of embodiments of the present application. One skilled in the relevant art will recognize, however, that the
[0036] It should be noted that: the "multiple" mentioned in this paper refers to two or more than two. The association relationship of "and / or" describes the associated object, which means that there can be three relationships, for example, A and / or B can represent: A exists alone, A and B exist together, and B exists alone. The character " / " generally represents that the associated objects before and after are a "or" relationship.
[0037] In order to more fully understand the technical content of the present application, the technical scheme of the present application will be further introduced and explained below in combination with specific embodiments, but not limited to this.
[0038] The technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.
[0039] It should be understood that when used in the specification and the appended claims, the terms "comprise" and "include" indicate the presence of described features, integers, steps, operations, elements, and / or components, but do not exclude one or more other features, integers, steps, operations, elements, components, and / or groups thereof.
[0040] It should also be understood that the term "and / or" used in the specification and the appended claims means any combination of one or more of the associated listed items and all possible combinations thereof, and includes these combinations.
[0041] The implementation details of the technical solution of this utility model embodiment are described in detail below:
[0042] First, it should be noted that the insulation protection scheme for disconnecting switches proposed in this utility model can be applied to related technical fields of insulation protection for disconnecting switches. For further information, please refer to... Figure 5 As shown, Figure 5 This is a schematic diagram of the installation of an insulator 700 in an existing disconnecting switch. The insulator 700 is used to isolate the grounded iron frame 500 and the body 600 of the disconnecting switch. If there are any conductive objects (such as wires or animals) between the iron frame 500 and the body 600 of the disconnecting switch, causing conductive connection between the iron frame 500 and the body 600 of the disconnecting switch, it will bring serious conductive risks. Therefore, it is necessary to block the connection between the iron frame 500 and the body 600 of the disconnecting switch, so that the iron frame 500 and the body 600 of the disconnecting switch are insulated.
[0043] Existing disconnect switches all use fixed insulating baffles, which limits the size of the baffles. When encountering larger or smaller disconnect switches, the fixed-size baffle body 100 is clearly unsuitable. At the same time, the positional relationship between the two insulators 700 may also change due to different disconnect switch specifications, causing the distance between the two insulators 700 to change. Existing disconnect switch insulating baffles cannot solve the problem of incompatibility caused by different disconnect switch specifications.
[0044] The first aspect of this utility model provides an insulating baffle for a disconnecting switch, such as... Figures 1 to 4 As shown, the insulating baffle includes two baffle bodies 100 and two stop assemblies 200, with one baffle body 100 slidably connected to the other baffle body 100. Each baffle body 100 has a fixing hole 110 through which an insulator 700 of the disconnecting switch passes. Each baffle body 100 has an opening 120 that connects to the fixing hole 110 from the edge of the baffle body 100. Each stop assembly 200 corresponds to a baffle body 100. Each stop assembly 200 has a stopping state and a clearance state, and includes two stop members disposed on opposite sides of the opening 120. 210, the stop member 210 rotates relative to the baffle body 100, causing the stop assembly 200 to switch between a stop state and a clearance state; in the stop state of the stop assembly 200, a portion of the stop member 210 extends into the opening 120, and the distance between the two stop members 210 is less than the width of the insulator 700, so as to prevent the insulator 700 from sliding out of the corresponding fixing hole 110; in the clearance state of the stop assembly 200, the distance between the two stop members 210 is greater than or equal to the width of the insulator 700, so that the insulator 700 can enter the fixing hole 110 through the opening 120.
[0045] The two baffle bodies 100 are slidably connected, and the distance between the two openings 120 can be adjusted to adapt to disconnectors of different specifications; in the avoiding state of the stopper assembly 200, the distance between the two stoppers 210 is greater than or equal to the width of the insulator 700, so that the insulator 700 can enter the fixing hole 110 from the opening 120, thereby realizing quick installation of the insulating baffle; the stopper 210 rotates relative to the baffle body 100, so that the stopper assembly 200 is switched to the stop state, at this time, part of the stopper 210 extends into the opening 120, and the distance between the two stoppers 210 is less than the width of the insulator 700, so as to prevent the insulator 700 from sliding out of the corresponding fixing hole 110, effectively preventing the insulator 700 from accidentally sliding out of the fixing hole 110, and ensuring the stability of the installation of the insulating baffle.
[0046] It should be noted that, as shown in Figure 5 , the insulator 700 is generally in the form of a corrugated pipe, and the width of the insulator 700 generally refers to the maximum diameter of the insulator 700, so that the insulator 700 can pass through the opening 120. The distance between the two stoppers 210 refers to the minimum distance between the two stoppers 210; in the avoiding state of the stopper assembly 200, part of the stopper 210 can also extend into the opening 120, as long as the distance between the two stoppers 210 is less than the width of the insulator 700.
[0047] Specifically, as shown in Figure 1 , the two baffle bodies 100 are slidably connected, that is, when the specifications of the disconnectors are different, the distance between the two insulators 700 changes, at this time, the positions can be adapted by sliding the two baffle bodies 100, compared with the fixed insulating baffle for protecting the disconnectors in the prior art, the adaptability of the insulating protection can be improved.
[0048] In some embodiments, as Figure 3As shown, the insulating baffle further comprises a connecting shaft 300 and a reset torsion spring 400, the stopper 210 is rotatably connected to the baffle body 100 through the connecting shaft 300 to achieve the slidable connection of the two baffle bodies 100, which is conducive to adapting to different specifications of the disconnecting switch; wherein the reset torsion spring 400 is sleeved outside the connecting shaft 300, so that the stopper assembly 200 can be quickly reset to the stop state. It can be understood that when the insulating baffle is installed, the insulator 700 is extruded by the insulator 700 during the process of entering the fixing hole 110 from the opening 120, the stopper 210 rotates relative to the baffle body 100, so that the distance between the two stoppers 210 increases, at this time the stopper assembly 200 is switched from the stop state to the avoidance state, the reset torsion spring 400 stores elastic force, the distance between the two stoppers 210 is greater than or equal to the width of the insulator 700, so that the insulator 700 passes through the opening 120 and enters the fixing hole 110; under the condition that the insulator 700 is located in the fixing hole 110, the reset torsion spring 400 releases the elastic force, so that the two stoppers 210 rotate relative to the baffle body 100, the stopper assembly 200 is switched from the avoidance state to the stop state, and the distance between the two stoppers 210 is less than the width of the insulator 700, so as to limit the insulator 700 in the fixing hole 110, and further ensure that the relative position between the insulating baffle and the disconnecting switch does not change.
[0049] In some embodiments, the stopper 210 comprises a stopper segment 211, one end of the stopper segment 211 is rotatably connected to the baffle body 100, the other end extends into the opening 120, and the stopper segment 211 extends towards the fixing hole 110, so that the stopper segment 211 can abut against the insulator 700 located in the fixing hole 110 in the stop state of the stopper assembly 200, further limiting the movement of the insulator 700 in the fixing hole 110, avoiding the insulator 700 from sliding out of the fixing hole 110 due to shaking or other factors. The stopper segment 211 extends towards the fixing hole 110, therefore, the insulator 700 cannot apply a force to the stopper 210 to separate the two stoppers 210, that is, during the process of the insulator 700 entering the fixing hole 110 from the opening 120, the insulator 700 can push the stopper 210 to rotate, so that the distance between the two stoppers 210 increases, and then the insulator 700 enters the fixing hole 110, and the insulator 700 located in the fixing hole 110 cannot apply a pushing force to the stopper 210 to increase the distance between the two stoppers 210, therefore, the insulator 700 can be locked in the fixing hole 110. If it is necessary to disassemble the insulating baffle, it is only necessary to manually rotate the stopper 210, so that the distance between the two stoppers 210 is sufficient to accommodate the insulator 700 to pass through.
[0050] In some embodiments, the stopper 210 further comprises a limiting segment 212 connected with the stopper segment 211, and the baffle body 100 is provided with a limiting block 130, which abuts against the limiting segment 212 in the avoiding state of the stopper assembly 200, so as to limit the movement of the corresponding stopper segment 211 towards the direction away from the other stopper segment 211. The rotation angle of the stopper 210 can be limited by the limiting block 130, so as to improve the efficiency of the stopper 210 returning to the stop state. The limiting block 130 is arranged corresponding to the stopper 210, so as to limit the rotation angle of the corresponding stopper 210.
[0051] In some embodiments, the limiting segment 212 is a shell, and the limiting segment 212 has a first inner wall 212a and a second inner wall 212b arranged oppositely, and the limiting block 130 is located inside the shell. In the stop state of the stopper assembly 200, the limiting block 130 abuts against the first inner wall 212a, so as to limit the movement of the corresponding stopper segment 211 towards the other stopper segment 211. In the avoiding state of the stopper assembly 200, the limiting block 130 abuts against the second inner wall 212b, so as to limit the movement of the corresponding stopper segment 211 towards the direction away from the other stopper segment 211. The limiting block 130 is located inside the shell, and the stopper 210 can be limited within a certain angle range by one limiting block 130.
[0052] For example, the stopper assembly 200 comprises two stoppers 210, i.e., a first stopper 220 and a second stopper 230, which are arranged corresponding to the two sides of the opening 120. In the stop state of the stopper assembly 200, the distance between the first stopper 220 and the second stopper 230 is smaller than the width of the insulator 700, so that the stopper assembly 200 is sufficient to prevent the insulator 700 from sliding. At this time, the limiting block 130 corresponding to the first stopper 220 abuts against the first inner wall 212a of the limiting segment 212 of the first stopper 220, so as to limit the movement of the stopper segment 211 of the first stopper 220 towards the stopper segment 211 of the second stopper 230. In the avoiding state of the stopper assembly 200, the distance between the first stopper 220 and the second stopper 230 is greater than or equal to the width of the insulator 700, so that the insulator 700 can enter the fixing hole 110 from the opening 120. The limiting block 130 corresponding to the first stopper 220 abuts against the second inner wall 212b of the stopper segment 211 of the first stopper 220, so as to limit the movement of the stopper segment 211 of the first stopper 220 towards the direction away from the stopper segment 211 of the second stopper 230.
[0053] In some embodiments, the stopper segment 211 is a shell, and the limiting segment 212 and the stopper segment 211 are integrally formed.
[0054] In some embodiments, the included angle between the stop segment 211 and the limiting segment 212 of the same stop piece 210 is greater than ninety degrees, and the limiting segment 212 extends towards the direction away from the other stop piece 210, so that the normal projection plane of the limiting segment 212 in the thickness direction of the baffle body 100 is located as far as possible in the baffle body 100, avoiding the interference of the limiting segment 212 with the entry of the insulator 700 into the fixing hole 110 through the opening 120.
[0055] That is, the included angle between the stop segment 211 and the limiting segment 212 of the first stop piece 220 is greater than ninety degrees, and the limiting segment 212 of the first stop piece 220 extends towards the direction away from the second stop piece 230, the included angle between the stop segment 211 and the limiting segment 212 of the second stop piece 230 is greater than ninety degrees, and the limiting segment 212 of the second stop piece 230 extends towards the direction away from the first stop piece 220.
[0056] In some embodiments, the stop piece 210 is located on the side of the baffle body 100 away from the other baffle body 100, avoiding the influence of the stop piece 210 on the relative movement between the two baffle bodies 100. One of the baffle bodies 100 is set as the first baffle 140, and the other baffle body 100 is set as the second baffle 150. The first stop piece 220 is installed on the side of the first baffle 140 away from the second baffle 150, and the second stop piece 230 is installed on the side of the second baffle 150 away from the first baffle 140.
[0057] Referring to Figure 5 If there is some conductive body (such as a wire, an animal) between the iron stand 500 and the main body 600 of the disconnector, so that the iron stand 500 and the main body 600 of the disconnector are in conductive communication, it will bring serious conductive risk, so it is necessary to block the iron stand 500 and the main body 600 of the disconnector, so that the iron stand 500 and the main body 600 of the disconnector are insulated, therefore, the part of the stop piece 210 extends into the opening 120 of the baffle to limit the sliding of the insulator 700 out of the fixing hole 110, so as to ensure that the insulating baffle is located between the iron stand 500 and the main body of the disconnector, which can effectively prevent the conductive body from entering the gap between the iron stand 500 and the main body 600 of the disconnector to make the iron stand 500 and the main body 600 of the disconnector conductive communication.
[0058] In summary, the utility model discloses the sliding connection between the two baffle bodies 100 to adapt to different specifications of the disconnector, and the limiting of the insulator 700 by the stop assembly 200, so that the relative position of the baffle body 100 and the main body 600 of the disconnector does not change, so as to solve the problems of the locking mechanism not firm, easy to be affected by environmental factors, difficult to install and maintain and the like.
[0059] In conclusion, the utility model discloses the sliding connection between the baffle body of two insulating disconnector is adapted to different specifications, and the relative position of the baffle body and the main body of the insulating disconnector does not change by the limiting of the stopper assembly, so as to solve the problem of the locking mechanism not firm, vulnerable to environmental factors, difficult installation and maintenance.
[0060] Furthermore, the above-described figures are merely schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, and are not intended for limiting purposes. It is readily understood that the processes shown in the above-described figures do not indicate or limit the time sequence of these processes. In addition, it is readily understood that these processes can be executed, for example, synchronously or asynchronously in a plurality of modules.
[0061] It is to be understood that the present application is not limited to the precise construction which has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be effected therein without departing from the scope of the application. The scope of the application should only be limited by the appended claims.
[0062] It should be noted that, in this document, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another, without necessarily requiring or implying any actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus. An element proceeded by "comprises... a" does not, without more constraints, exclude the existence of additional identical elements in the process, method, article, or apparatus that comprises the element.
[0063] The above description is merely that of the specific embodiments of the present application, making it possible for those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the present application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. An insulating shutter of a disconnector, characterized in that, The application relates to an insulating baffle for an isolating switch, which comprises two baffle bodies, one of which is slidingly connected to the other; the baffle bodies are provided with fixed holes for the insulating sub of the isolating switch to pass through; the baffle bodies are provided with openings which are communicated with the fixed holes from the edges of the baffle bodies; two stop components are provided for the baffle bodies; the stop components have a stop state and a avoiding state; the stop components comprise two stop pieces which are arranged on the two sides of the openings; the stop pieces are rotated relative to the baffle bodies so that the stop components are switched between the stop state and the avoiding state; in the stop state of the stop components, the stop pieces are partially inserted into the openings, and the distance between the two stop pieces is smaller than the width of the insulating sub so as to prevent the insulating sub from sliding out of the corresponding fixed hole; in the avoiding state of the stop components, the distance between the two stop pieces is greater than or equal to the width of the insulating sub so that the insulating sub can enter the fixed hole through the openings. The insulating baffle further comprises a connecting shaft and a reset torsion spring; the stop pieces are rotatably connected to the baffle bodies through the connecting shaft; and the reset torsion spring is arranged outside the connecting shaft. The stop pieces comprise stop segments; one end of the stop segments is rotatably connected to the baffle bodies; the other end of the stop segments is inserted into the openings; and the stop segments extend towards the fixed holes. The stop pieces further comprise limiting segments which are connected to the stop segments; the baffle bodies are provided with limiting blocks; in the avoiding state of the stop components, the limiting blocks abut against the limiting segments so as to limit the movement of the corresponding stop segments towards the direction away from the other stop segments.
2. The insulating shutter of a disconnector according to claim 1, characterised in that, The limiting segments are housings; the limiting segments have oppositely arranged first inner walls and second inner walls; and the limiting blocks are arranged inside the housings; in the stop state of the stop components, the limiting blocks abut against the first inner walls so as to limit the movement of the corresponding stop segments towards the other stop segments; in the avoiding state of the stop components, the limiting blocks abut against the second inner walls so as to limit the movement of the corresponding stop segments towards the direction away from the other stop segments.
3. The insulating shutter of a disconnector according to claim 1, characterized in that, The included angle between the stop segments and the limiting segments of the same stop piece is greater than 90 degrees; and the limiting segments extend towards the direction away from the other stop piece.
4. An insulating shutter for a disconnector according to claim 3, characterised in that The stop pieces are arranged on the side of the baffle bodies away from the other baffle body.
5. An insulating shutter for a disconnector according to claim 4, characterised in that 6. An insulating shutter for a disconnecting switch according to claim 4, characterised in that 7. An insulating shutter for a disconnector according to any one of claims 1 to 6, characterised in that,