Insulation protection device for primary and secondary fusion vacuum circuit breaker disconnecting link

Abstract

The utility model relates to the technical field of metal conductive insulation protection, in particular to an insulation protection device for a primary and secondary fusion vacuum circuit breaker disconnecting link. The device comprises a protective device and an adjusting device, wherein the protective device comprises a protective cover body and a limiting device; the protective cover body comprises a first protective shell and a second protective shell, a sliding groove is formed in the top of the first protective shell, a protruding block is arranged at the top of the second protective shell, and the protruding block is arranged in the sliding groove; the limiting device comprises two symmetrical limiting plates and a torsional spring device, and the two limiting plates abut against each other; the limiting plate is in sliding connection with the first protective shell, and the torsional spring device is wound on the limiting plate and connected with the side wall of the first protective shell. According to the utility model, the knife switch can enter the protective cover body without dismounting the insulation protective device, so that the problem of high protection complexity of the knife switch in the prior art is solved, and insulation protection can be carried out on knife switches of various different specifications according to the flexible adaptability of the insulation protective device.

Description

TECHNICAL FIELD

[0001] The utility model relates to metal conductive insulation protection technical field, especially relate to a kind of insulation protection device for primary-secondary fusion vacuum circuit breaker knife switch. BACKGROUND

[0002] In the operation process of the current primary-secondary fusion vacuum circuit breaker, its knife switch belongs to conductive device, and the knife switch needs to be insulated to avoid the risk of electric shock. In some existing insulation protection devices, the knife switch is usually placed in the insulation cover after the insulation device is partially disassembled. This obviously has the problem of high complexity and tediousness of protection assembly. At the same time, these existing insulation protection devices can only be applied to a certain specific size of knife switch, and cannot be flexibly protected according to different models of primary-secondary fusion vacuum circuit breaker knife switch, greatly limiting its application diversity and flexible adaptability. SUMMARY

[0003] The utility model provides a kind of insulation protection device for primary-secondary fusion vacuum circuit breaker knife switch to solve one or more technical problems existing in the prior art, at least provide a beneficial choice or create conditions.

[0004] Other characteristics and advantages of the utility model will become apparent from the following detailed description, or learned in part by the practice of the utility model.

[0005] According to one aspect of the embodiments of the utility model, an insulation protection device for a primary-secondary fusion vacuum circuit breaker knife switch is provided. The device includes a protection device and an adjusting device. The protection device includes a protection cover and a limiting device at the lower end of the protection cover.

[0006] The protection cover includes a first protection shell and a second protection shell. A sliding groove is formed in the top of the first protection shell. A protruding block is provided on the top of the second protection shell. The protruding block is located in the sliding groove to allow the first protection shell and the second protection shell to be slidably connected.

[0007] The limiting device includes two limiting plates that are symmetrical to each other and a torsion spring device. The two limiting plates abut each other. The limiting plates are slidably connected to the first protection shell. The torsion spring device is wound around the limiting plates and connected to the side wall of the first protection shell.

[0008] In the process that the primary and secondary fused vacuum circuit breaker switch enters the protective cover, the primary and secondary fused vacuum circuit breaker switch continuously pushes and rotates the two limiting plates, and the torsion spring device abuts on the limiting plates to form an opening through which the primary and secondary fused vacuum circuit breaker switch can enter the protective cover; after the primary and secondary fused vacuum circuit breaker switch completely enters the protective cover, the two limiting plates are reset to close the opening.

[0009] In an embodiment of the utility model, based on aforementioned scheme, the limiting plate includes rotating shaft, rotatable plate and two positioning blocks arranged on the rotatable plate, two ends of the rotating shaft are connected with the first protective shell, the rotatable plate is connected with the rotating shaft;

[0010] In the state that the opening is closed, the two positioning blocks contact each other.

[0011] In an embodiment of the utility model, based on aforementioned scheme, the torsion spring device includes winding part, extension part connected with the winding part and bending part connected with one end of the extension part, the winding part is wound on the rotating shaft, the extension part contacts with the rotatable plate;

[0012] In the process that the primary and secondary fused vacuum circuit breaker switch enters the protective cover, the rotatable plates of the two limiting plates rotate and the bending part abuts on the rotatable plate to continuously open the two rotatable plates to form the opening, and the opening is used to make the primary and secondary fused vacuum circuit breaker switch completely pass through.

[0013] In an embodiment of the utility model, based on aforementioned scheme, the first protective shell includes arched gate protective shell, intermediate protective shell and square protective shell, the arched gate protective shell and the square protective shell are respectively arranged at two ends of the intermediate protective shell, and the square protective shell is slidably connected with the second protective shell.

[0014] In an embodiment of the utility model, based on aforementioned scheme, the intermediate protective shell includes top and two lateral extension parts, the sliding groove is arranged on the top, two ends of the top are respectively connected with the arched gate protective shell and the square protective shell; the lateral extension part is below the top and connected with the top, and two ends of the lateral extension part are respectively connected with the arched gate protective shell and the square protective shell.

[0015] In an embodiment of the utility model, based on preceding scheme, the sliding groove includes sliding communication portion and limiting portion, sliding communication portion with limiting portion intercommunication, when convex block is located in limiting portion, second protective shell is inlayed in square protective shell and is fixedly connected with square protective shell, when convex block is located in sliding communication portion, second protective shell is connected with square protective shell sliding.

[0016] In an embodiment of the utility model, based on preceding scheme, the adjusting device includes door-shaped clamping device and adjusting rod device, the adjusting rod device is fixedly connected with the door-shaped clamping device, and the door-shaped clamping device is connected with the arch-shaped protective shell.

[0017] In an embodiment of the utility model, based on preceding scheme, the adjusting rod device includes connecting rod, assembly block arranged at one end of the connecting rod, and fixing block arranged at the other end of the connecting rod, and the fixing block is fixedly connected with the top of the door-shaped clamping device.

[0018] In an embodiment of the utility model, based on preceding scheme, the door-shaped clamping device includes a door-shaped shell, a screw fixing device, and two clamping extension parts extending into the door-shaped shell, the door-shaped shell is connected with the two clamping extension parts, the screw fixing device penetrates the door-shaped shell and is connected with the clamping extension parts and the arch-shaped protective shell, so as to clamp and fix the arch-shaped protective shell.

[0019] In an embodiment of the utility model, based on preceding scheme, the screw fixing device includes a screw rod, a spring, and a bolt, the bolt is arranged on the clamping extension part and contacts the arch-shaped protective shell, the spring is arranged on the screw rod, the screw rod penetrates the door-shaped shell and is threadedly connected with the bolt, and the arch-shaped protective shell is clamped by the screw rod and the clamping extension part.

[0020] The utility model discloses the beneficial effect is: through the first protective shell and the second protective shell between the slidable connection, can expand the protection area and the protection volume of protective cover body, when facing the one two fusion vacuum circuit breaker knife switch of different specifications, can according to the size of knife switch to adjust the protective cover body flexibly, improve the flexible adaptability of the utility model's insulation protection device.

[0021] Further, in the original state where the primary and secondary fused vacuum circuit breaker switch is not placed or the primary and secondary fused vacuum circuit breaker switch has been completely placed into the protective cover body, the two limiting plates abut against each other and form a full-range protective protective cover body with the first protective shell and the second protective shell. In the process of placing the primary and secondary fused vacuum circuit breaker switch into the protective cover body, the primary and secondary fused vacuum circuit breaker switch continuously pushes and rotates the two limiting plates, and the torsion spring device abuts against the limiting plates to form an opening through which the primary and secondary fused vacuum circuit breaker switch can pass, thereby enabling the primary and secondary fused vacuum circuit breaker switch to completely enter the protective cover body. Finally, the two limiting plates are reset to close the opening by the elastic deformation of the torsion spring device, so that the switch enters the protective cover body of the insulation protection device, and the protective cover body effectively insulates and protects the switch.

[0022] Therefore, the switch can enter the protective cover body without disassembling the insulation protection device, thereby solving the problem of high complexity of protecting the switch in the prior art, and enabling the insulation protection device to insulate and protect switches of various specifications according to the flexible adaptability of the insulation protection device. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed in the embodiment description will be briefly described below. Obviously, the described drawings are only a part of the embodiments of the present application, not all embodiments, and those skilled in the art can obtain other design schemes and drawings according to these drawings without creative labor.

[0024] Figure 1 is a structural schematic view of a primary and secondary fused vacuum circuit breaker according to an embodiment of the present application;

[0025] Figure 2 is a schematic view of the protective device assembled on the primary and secondary fused vacuum circuit breaker switch to insulate and protect the switch according to an embodiment of the present application;

[0026] Figure 3 is a whole schematic view of the insulation protection device for the primary and secondary fused vacuum circuit breaker switch according to an embodiment of the present application;

[0027] Figure 4 is a schematic view of the limiting plate and the protective cover body in the closed opening state according to an embodiment of the present application;

[0028] Figure 5 is a position connection schematic view between the torsion spring device and the limiting plate when the switch pushes and rotates the limiting plate to enter the protective cover body according to an embodiment of the present application;

[0029] Figure 6 It is a schematic view of the first protective shell according to the embodiment of the utility model;

[0030] Figure 7 It is a state schematic view of the second protective shell according to the embodiment of the utility model;

[0031] Figure 8 It is a specific structure diagram of the adjusting device according to the embodiment of the utility model;

[0032] Figure 9 It is an internal structure schematic view of the fixed block according to the embodiment of the utility model;

[0033] Figure 10 It is a parts unassembled view of the door-shaped clamping device according to the embodiment of the utility model;

[0034] Figure 11 It is a schematic view of the door-shaped clamping device after all parts are assembled according to the embodiment of the utility model;

[0035] Figure 12 It is an internal schematic view of the protective cover body without assembling the limiting device according to the embodiment of the utility model.

[0036] DRAWINGS

[0037] Protective device 1, protective cover 11, first protective shell 111, arch door-shaped protective shell 1111, intermediate protective shell 1112, top 11121, lateral extension 11122, square-shaped protective shell 1113, sliding groove 112, sliding communication part 1121, limiting part 1122, second protective shell 113, protruding block 114, limiting device 12, limiting plate 121, rotating shaft 1211, rotatable plate 1212, positioning block 1213, torsional spring device 122, winding part 1221, extension part 1222, bending part 1223, opening 123, adjusting device 2, door-shaped clamping device 21, door-shaped shell 211, screw fixing device 212, screw rod 2121, spring 2122, bolt 2123, clamping extension part 213, adjusting rod device 22, connecting rod 221, assembling block 222, fixed block 223, primary and secondary fusion vacuum circuit breaker knife switch 3, primary and secondary fusion vacuum circuit breaker 4. DETAILED DESCRIPTION

[0038] Example implementations are now described by reference to the drawings. Example implementations can be implemented in a variety of 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 example implementations to those skilled in the art.

[0039] Moreover, 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

[0040] The block diagrams shown in the drawings are merely functional entities, and do not necessarily have to correspond to physically independent entities. These functional entities can be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller nodes.

[0041] The flowcharts shown in the drawings are merely exemplary illustrations, and do not necessarily include all contents and operations / steps, nor are they necessarily executed in the order described. For example, some operations / steps can be further decomposed, and some operations / steps can be combined or partially combined, so the actual execution order can be changed according to actual conditions.

[0042] It should be noted that "multiple" referred to herein means two or more. The association relationship of "and / or" describes the associated objects, which means that there can be three relationships, for example, A and / or B can represent the three cases of A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0043] The application environment of the embodiments of the present application is introduced as follows:

[0044] As shown in Figure 1 and Figure 2 , the structure of a primary and secondary fusion vacuum circuit breaker 4 is shown in Figure 1 , the structure of a primary and secondary fusion vacuum circuit breaker 4 is shown in Figure 2 The protective device 1 of the present application is assembled on the knife switch 3 of the primary and secondary fusion vacuum circuit breaker to insulate and protect the knife switch. The primary and secondary fusion vacuum circuit breaker knife switch 3 can be shown in Figure 1 , which is a long strip-shaped metal conductive device. The insulation protection device of the present application is used to insulate and protect the primary and secondary fusion vacuum circuit breaker knife switch 3 in all directions, so as to avoid the risk of conduction. Because the primary and secondary fusion vacuum circuit breaker has three knife switches, the risk of conduction may come from some animals climbing between adjacent knife switches. Since animals are generally conductive, the knife switch is easy to conduct between the knife switches.

[0045] The implementation details of the technical solutions of the embodiments of the utility model are described in detail as follows:

[0046] According to an aspect of the embodiments of the utility model, an insulation protection device for a primary and secondary fusion vacuum circuit breaker knife switch is provided, as shown in the drawings, Figures 3-12 The device includes a protection device 1 and an adjusting device 2, the protection device 1 includes a protection cover body 11 and a limiting device 12 arranged at the lower end of the protection cover body 11.

[0047] The protection cover body 11 includes a first protection shell 111 and a second protection shell 113, a sliding groove 112 is formed at the top of the first protection shell 111, a protruding block 114 is arranged at the top of the second protection shell 113, and the protruding block 114 is arranged in the sliding groove 112 to enable the first protection shell 111 and the second protection shell 113 to be slidably connected.

[0048] The limiting device 12 includes two limiting plates 121 and a torsion spring device 122, the two limiting plates 121 abut against each other, the limiting plates 121 are slidably connected with the first protection shell 111, and the torsion spring device 122 is wound on the limiting plates 121 and connected with the side wall of the first protection shell 111.

[0049] During the process of the primary and secondary fusion vacuum circuit breaker knife switch 3 entering the protection cover body 11, the primary and secondary fusion vacuum circuit breaker knife switch 3 continuously pushes and rotates the two limiting plates 121, and the torsion spring device 122 abuts against the limiting plates 121 to form an opening 123 through which the primary and secondary fusion vacuum circuit breaker knife switch 3 can pass, and the primary and secondary fusion vacuum circuit breaker knife switch 3 enters the protection cover body 11 through the opening 123; after the primary and secondary fusion vacuum circuit breaker knife switch 3 completely enters the protection cover body 11, the two limiting plates 121 are reset to close the opening 123.

[0050] Specifically, as shown in the drawings, Figure 3 Figure 3 It is a whole schematic view of the insulation protection device of the utility model. Through the slidable connection between the first protection shell 111 and the second protection shell 113, the protection area and the protection volume of the protection cover body 11 can be expanded, and when facing different specifications of the primary and secondary fusion vacuum circuit breaker knife switch 3, the protection cover body 11 can be flexibly adjusted according to the size of the knife switch, thereby improving the flexible adaptability of the insulation protection device of the utility model.

[0051] ​Furthermore, in the original state where the primary and secondary fusion vacuum circuit breaker disconnector 3 is not placed, or when the primary and secondary fusion vacuum circuit breaker disconnector 3 has been completely placed into the protective cover 11, the two limiting plates 121 abut against each other and form a protective cover 11 with the first protective shell 111 and the second protective shell 113, providing all-round protection. During the process of the primary and secondary fusion vacuum circuit breaker disconnector 3 entering the protective cover 11, the primary and secondary fusion vacuum circuit breaker disconnector 3 continuously pushes the two limiting plates 121 to rotate, and the torsion spring device 122 abuts against the limiting plates 121 to form an opening 123 that allows the primary and secondary fusion vacuum circuit breaker disconnector 3 to pass through, thereby allowing the primary and secondary fusion vacuum circuit breaker disconnector 3 to completely enter the protective cover 11. Finally, the elastic deformation of the torsion spring device 122 causes the two limiting plates 121 to reset and close the opening 123, ultimately allowing the disconnector to enter the protective cover 11 of the insulation protection device, so that the protective cover 11 provides effective insulation protection for the disconnector.

[0052] Therefore, this utility model allows the knife switch to enter the protective cover 11 without disassembling the insulation protection device, solving the problem of high complexity in the protection of knife switches in the prior art. At the same time, it can provide insulation protection for various knife switches of different specifications based on the flexible adaptability of the insulation protection device of this utility model.

[0053] Furthermore, the limiting plate 121 includes a rotating shaft 1211, a rotatable plate 1212, and two positioning blocks 1213 disposed on the rotatable plate 1212. The two ends of the rotating shaft 1211 are connected to the first protective shell 111, and the rotatable plate 1212 is connected to the rotating shaft 1211.

[0054] When the opening 123 is closed, the two positioning blocks 1213 are in contact with each other.

[0055] See Figure 4 As shown, Figure 4 This diagram shows the limiting plate 121 and the protective cover 11 in the closed state of the opening 123. The closed state of the opening 123 can be divided into two situations: the first situation is the original state where the primary and secondary fusion vacuum circuit breaker disconnector 3 is not placed; the second situation is when the primary and secondary fusion vacuum circuit breaker disconnector 3 has been completely placed into the protective cover 11. The two ends of the rotating shaft 1211 are rotatably connected to the first protective housing 111, so that the rotatable plate 1212 can be rotated through the rotating shaft 1211, thereby forming an open opening 123 to allow the primary and secondary fusion vacuum circuit breaker disconnector 3 to enter the protective cover 11.

[0056] Further, the torsion spring device 122 comprises a winding part 1221, an extension part 1222 connected with the winding part 1221, and a bending part 1223 connected with one end of the extension part 1222, the winding part 1221 is wound on the rotating shaft 1211, the extension part 1222 is in contact with the rotatable plate 1212;

[0057] In the process that the primary and secondary fused vacuum circuit breaker switch 3 enters the protective cover 11, the rotatable plates 1212 of the two limiting plates 121 rotate and the bending part 1223 is in abutment with the rotatable plate 1212, so that the two rotatable plates 1212 continuously open to form the opening 123, the opening 123 is used to make the primary and secondary fused vacuum circuit breaker switch 3 pass completely.

[0058] Specifically, referring to Figure 5 shown, Figure 5 is a schematic view of the position connection between the torsion spring device 122 and the limiting plate 121 when the switch extrusion limiting plate 121 enters the protective cover 11. In the process that the primary and secondary fused vacuum circuit breaker switch 3 enters the protective cover 11, the rotatable plate 1212 rotates through the rotating shaft 1211 under the extrusion of the primary and secondary fused vacuum circuit breaker switch 3, the bending part 1223 of the torsion spring device 122 is not in contact with the rotatable plate 1212 in the original state, but the bending part 1223 is in contact with the rotatable plate 1212 as the rotatable plate 1212 continuously rotates, and after the contact, the primary and secondary fused vacuum circuit breaker switch 3 can continuously extrude the rotatable plate 1212 to rotate to make the rotatable plate 1212 move together with the torsion spring device 122, so that the area of the opening 123 is larger, so as to accommodate the primary and secondary fused vacuum circuit breaker switch 3 with larger size. Of course, the primary and secondary fused vacuum circuit breaker switch 3 with smaller size can completely enter the protective cover 11 without the contact of the torsion spring device 122 to the rotatable plate 1212. Wherein, as Figure 12 shown, Figure 12 is a specific schematic view of the torsion spring device 122 and the limiting device 12.

[0059] Further, the first protective shell 111 comprises an arch-shaped protective shell 1111, an intermediate protective shell 1112, and a square-shaped protective shell 1113, the arch-shaped protective shell 1111 and the square-shaped protective shell 1113 are respectively arranged at two ends of the intermediate protective shell 1112, and the square-shaped protective shell 1113 is slidably connected with the second protective shell 113.

[0060] Specifically, referring to Figure 6 shown, Figure 6As a schematic view of the first protective shell 111, the two ends of the primary and secondary fused vacuum circuit breaker switch 3 can be insulated and protected by the arched protective shell 1111 at both ends and the square protective shell. If the second protective shell 113 is needed to expand the protective volume, then the second protective shell 113 and the arched protective shell 1111 are used to insulate and protect the two ends of the primary and secondary fused vacuum circuit breaker switch 3.

[0061] Further, the intermediate protective shell 1112 includes a top portion 11121 and two lateral extension portions 11122. The sliding groove 112 is arranged on the top portion 11121, and the two ends of the top portion 11121 are connected with the arched protective shell 1111 and the square protective shell 1113 respectively. The lateral extension portions 11122 are below the top portion 11121 and connected with the top portion 11121, and the two ends of the lateral extension portions 11122 are connected with the arched protective shell 1111 and the square protective shell 1113 respectively.

[0062] Specifically, continuing to refer to Figure 6 As shown, the top portion 11121 of the intermediate protective shell 1112 is provided with the sliding groove 112, and the top portion of the square protective shell 1113 is also provided with the sliding groove 112, that is, the sliding groove 112 extends from the top portion 11121 of the intermediate protective shell 1112 to the top portion of the square protective shell 1113. The lateral extension portions 11122 are below the top portion 11121 and are used to expand the area of the protective cover 11 in the lateral direction, so as to insulate and protect the switch of a larger size.

[0063] Further, the sliding groove 112 includes a sliding communication portion 1121 and a limiting portion 1122. When the protruding block 114 is located in the limiting portion 1122, the second protective shell 113 is embedded in the square protective shell 1113 and fixedly connected with the square protective shell 1113. When the protruding block 114 is located in the sliding communication portion 1121, the second protective shell 113 is slidably connected with the square protective shell 1113.

[0064] Specifically, continuing to refer to Figure 6As shown, the sliding groove 112 extends from the top 11121 of the middle protective shell 1112 to the top of the square protective shell 1113, and the limiting portion 1122 in the sliding groove 112 is used to place the protruding block 114. In the embodiment of the utility model, the number of protruding blocks 114 is exemplarily 2. When the protruding block 114 is placed in the limiting portion 1122, the position between the first protective shell 111 and the second protective shell 113 can be limited to a certain extent, and the sliding connection is changed to fixed connection. When the protruding block 114 is in the sliding communication portion 1121, the protruding block 114 can freely slide in the sliding communication portion 1121, so as to adjust the expansion area and volume of the second protective shell 113. Referring to Figure 7 As shown, Figure 7 It is a state diagram of the second protective shell 113.

[0065] Further, the adjusting device 2 comprises a door-shaped clamping device 21 and an adjusting rod device 22, the adjusting rod device 22 is fixedly connected with the door-shaped clamping device 21, and the door-shaped clamping device 21 is connected with the arch-shaped protective shell 1111.

[0066] Referring to Figure 8 As shown, Figure 8 It is a specific structure diagram of the adjusting device 2. Through the connection of the adjusting rod device 22 and the door-shaped clamping device 21, the adjusting rod device 22 can be disassembled and assembled. After the position and angle of assembly are adjusted, the position and angle of the door-shaped clamping device 21 can be adjusted, that is, the position and angle of the arch-shaped protective shell 1111 connected with the door-shaped clamping device 21 can also be adjusted.

[0067] Further, the adjusting rod device 22 comprises a connecting rod 221, an assembly block 222 arranged at one end of the connecting rod 221 and a fixed block 223 arranged at the other end of the connecting rod 221; and the fixed block 223 is fixedly connected with the top of the door-shaped clamping device 21.

[0068] Specifically, the flexible adjustment angle and the corresponding position adjustment of the adjusting rod device 22 can be increased by further assembling the connecting rod with the assembly block. Referring to Figure 9 As shown, Figure 9 It is an internal structure diagram of the fixed block 223. The fixed block 223 can be freely disassembled and assembled. The assembly mode can be adjusted in advance so that the mutual angle between the assembled fixed block 223 and the door-shaped clamping device 21 reaches the required target angle. In this way, during the process of placing the primary and secondary fusion vacuum circuit breaker switch 3 into the protective cover 11, the angle and position do not need to be adjusted, and the situation that the primary and secondary fusion vacuum circuit breaker switch 3 cannot enter the protective cover 11 due to improper angle and position is avoided.

[0069] Further, the door-shaped clamping device 21 comprises a door-shaped shell 211, a screw fixing device 212, and two clamping extensions 213 extending into the door-shaped shell 211; the door-shaped shell 211 is connected with the two clamping extensions 213, and the screw fixing device 212 penetrates through the door-shaped shell 211 and is connected with the clamping extensions 213 and the arched door-shaped protective shell 1111, so as to clamp and fix the arched door-shaped protective shell 1111.

[0070] Referring to Figure 10 , the door-shaped shell 211 is connected with the two clamping extensions 213, and the screw fixing device 212 penetrates through the door-shaped shell 211 and is connected with the clamping extensions 213 and the arched door-shaped protective shell 1111, so as to clamp and fix the arched door-shaped protective shell 1111. Figure 10 Further, the screw fixing device 212 comprises a screw rod 2121, a spring 2122, and a screw bolt 2123, the screw bolt 2123 is arranged on the clamping extension 213 and is in contact with the arched door-shaped protective shell 1111; the spring 2122 is arranged on the screw rod 2121, the screw rod 2121 penetrates through the door-shaped shell 211 and is threadedly connected with the screw bolt 2123, wherein the arched door-shaped protective shell 1111 is clamped by the screw rod 2121 and the clamping extension 213.

[0071] Referring to

[0072] , the screw rod 2121 is threadedly connected with the screw bolt 2123, the screw rod 2121 is continuously rotated, the screw bolt 2123 is continuously pressed, and the arched door-shaped protective shell 1111 clamped between the screw bolt 2123 and the clamping extension 213 is continuously pressed, so as to clamp the arched door-shaped protective shell 1111. When disassembling, only the screw bolt 2123 is rotated to loosen the thread connection with the screw bolt 2123, the spring 2122 on the screw rod 2121 is reset, the screw rod 2121 is pushed outward, so that the complexity of disassembly is reduced, the screw rod 2121 is only slightly twisted to release the connection with the screw bolt 2123, and the spring 2122 is reset to automatically realize the disassembly of the screw rod 2121 and the screw bolt 2123. Figure 11 Figure 11 is a schematic view of the inside of the protective cover 11 without assembling the limiting device 12, wherein the protective cover 11 can be used to accommodate a secondary fusion vacuum circuit breaker knife switch 3.

[0073] Figure 12 is a schematic view of the inside of the protective cover 11 without assembling the limiting device 12, wherein the protective cover 11 can be used to accommodate a secondary fusion vacuum circuit breaker knife switch 3.

[0074] ​In addition, the above-mentioned figures are only schematic illustrations of the processes included in the method according to the exemplary embodiments of the present application, and are not for limiting purposes. It is easy to understand that the processes shown in the above-mentioned figures do not indicate or limit the time sequence of these processes. In addition, it is also easy to understand that these processes can be executed synchronously or asynchronously in multiple modules.

[0075] It should 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 made without departing from the scope thereof. The scope of the present application is limited only by the claims which follow.

Claims

1. An insulation protection device for a secondary fusion vacuum circuit breaker knife switch, characterized in that, The device comprises a protection device and an adjusting device, the protection device comprises a protection cover body and a limiting device arranged at the lower end of the protection cover body; The protection cover body comprises a first protection shell and a second protection shell, a sliding groove is arranged at the top of the first protection shell, a protruding block is arranged at the top of the second protection shell, and the protruding block is arranged in the sliding groove to enable the first protection shell and the second protection shell to be slidably connected; The limiting device comprises two limiting plates which are symmetrical to each other and a torsion spring device, the two limiting plates abut against each other; the limiting plates are slidably connected with the first protection shell, and the torsion spring device is wound on the limiting plates and connected with the side wall of the first protection shell; During the process that the primary and secondary fused vacuum circuit breaker switch enters the protection cover body, the primary and secondary fused vacuum circuit breaker switch continuously pushes and pushes the two limiting plates to rotate, and the torsion spring device abuts against the limiting plates to form an opening through which the primary and secondary fused vacuum circuit breaker switch can pass, and the primary and secondary fused vacuum circuit breaker switch enters the protection cover body through the opening; after the primary and secondary fused vacuum circuit breaker switch completely enters the protection cover body, the two limiting plates are reset to close the opening.

2. The insulation shield for a secondary fused vacuum interrupter knife switch according to claim 1, wherein, The limiting plate comprises a rotating shaft, a rotatable plate and two positioning blocks arranged on the rotatable plate, the two ends of the rotating shaft are connected with the first protection shell, and the rotatable plate is connected with the rotating shaft; In the state that the opening is closed, the two positioning blocks contact each other.

3. The insulation shield for a secondary fused vacuum interrupter knife switch according to claim 2, wherein, The torsion spring device comprises a winding part, an extension part connected with the winding part and a bending part connected with one end of the extension part, the winding part is wound on the rotating shaft, and the extension part contacts the rotatable plate; During the process that the primary and secondary fused vacuum circuit breaker switch enters the protection cover body, the rotatable plates of the two limiting plates rotate and the bending part abuts against the rotatable plate to enable the two rotatable plates to continuously open to form the opening through which the primary and secondary fused vacuum circuit breaker switch can completely pass.

4. The insulation shield for a secondary fused vacuum interrupter knife switch according to claim 3, wherein, The first protection shell comprises an arch-shaped protection shell, an intermediate protection shell and a square-shaped protection shell, the arch-shaped protection shell and the square-shaped protection shell are arranged at the two ends of the intermediate protection shell respectively, and the square-shaped protection shell is slidably connected with the second protection shell.

5. The insulation shield for a secondary fused vacuum interrupter knife switch according to claim 4, wherein, The intermediate protection shell comprises a top and two lateral extension parts, the sliding groove is arranged at the top, the two ends of the top are connected with the arch-shaped protection shell and the square-shaped protection shell respectively, the lateral extension parts are below the top and connected with the top, and the two ends of the lateral extension parts are connected with the arch-shaped protection shell and the square-shaped protection shell respectively.

6. The insulation shield for a double-ponch vacuum interrupter of a switch according to claim 4, wherein The sliding groove comprises a sliding communication part and a limiting part, the sliding communication part communicates with the limiting part, when the convex block is located in the limiting part, the second protective shell is embedded in the square protective shell and fixedly connected with the square protective shell; when the convex block is located in the sliding communication part, the second protective shell is slidingly connected with the square protective shell.

7. The insulation shield for a secondary fused vacuum interrupter knife switch according to claim 4, wherein, The adjusting device comprises a door-shaped clamping device and an adjusting rod device, the adjusting rod device is fixedly connected with the door-shaped clamping device, and the door-shaped clamping device is connected with the arch-shaped protective shell.

8. The insulation shield for a secondary fused vacuum interrupter knife switch according to claim 7, wherein, The adjusting rod device comprises a connecting rod, an assembling block arranged at one end of the connecting rod, and a fixing block arranged at the other end of the connecting rod; the fixing block is fixedly connected with the top of the door-shaped clamping device.

9. The insulation shield for a secondary fused vacuum interrupter of a switch according to claim 8, wherein The door-shaped clamping device comprises a door-shaped shell, a screw fixing device, and two clamping extension parts extending into the door-shaped shell; the door-shaped shell is connected with the two clamping extension parts, the screw fixing device penetrates through the door-shaped shell and is connected with the clamping extension parts and the arch-shaped protective shell, so as to clamp and fix the arch-shaped protective shell.

10. The insulation shield for a secondary fused vacuum interrupter of a switch according to claim 9, wherein The screw fixing device comprises a screw rod, a spring, and a bolt, the bolt is arranged on the clamping extension part and in contact with the arch-shaped protective shell; the spring is arranged on the screw rod, the screw rod penetrates through the door-shaped shell and is threadedly connected with the bolt, wherein the arch-shaped protective shell is clamped by the screw rod and the clamping extension part.

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