Disconnecting switch protection device and disconnecting switch

Abstract

This utility model belongs to the field of power equipment technology and discloses a disconnecting switch protection device and a disconnecting switch. The disconnecting switch protection device includes a contact finger protection structure for protecting the stationary contact assembly. The stationary contact assembly includes a contact support with a first opening on its side. The contact finger protection structure includes a slide rail, a sliding plate, and a first elastic element. The slide rail is mounted on the contact support, and the sliding plate is slidably connected to the slide rail. The sliding plate has a first clearance state with the first opening open and a first protection state with the first opening blocked. The sliding plate can move to the first protection state under the pull of the first elastic element and can move from the first protection state to the first clearance state under the push of the moving contact. This disconnecting switch protection device can effectively protect the contact fingers, reduce the risk of contact finger icing, and thus improve the reliability of the disconnecting switch operation.

Description

Technical Field

[0001] This utility model relates to the field of power equipment technology, and in particular to a disconnecting switch protection device and a disconnecting switch. Background Technology

[0002] Disconnecting switches are important switching devices in power systems. Their main function is to ensure the safety of high-voltage electrical appliances and equipment during maintenance and to isolate voltage.

[0003] Most disconnect switches are installed outdoors, and the closing mechanism (including moving contacts and stationary contacts) in the disconnect switch is directly exposed to the air. In the cold winter environment, the disconnect switch is prone to icing disaster, which causes the disconnect switch contacts and contact fingers to be isolated by ice, resulting in poor contact, increased contact resistance, and serious overheating, ultimately affecting the safe operation of the substation and even the power grid.

[0004] Therefore, there is an urgent need to propose a protective device for disconnecting switches and a disconnecting switch to solve the above-mentioned technical problems. Utility Model Content

[0005] According to one aspect of the present invention, the present invention provides a protective device for disconnecting switches, which can effectively protect the contact fingers, reduce the risk of icing on the contact fingers, and thus improve the reliability of the disconnecting switch operation.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A disconnector switch protection device includes a contact finger protection structure for protecting a stationary contact assembly, wherein the stationary contact assembly includes a contact support, and the side of the contact support has a first opening;

[0008] The finger protection structure includes a slide rail, a sliding plate, and a first elastic element. The slide rail is disposed on the contact bracket, and the sliding plate is slidably connected to the slide rail.

[0009] The skateboard has a first avoidance state with the first opening open and a first protection state with the first opening blocked. The skateboard can move to the first protection state under the pull of the first elastic member, and can move from the first protection state to the first avoidance state under the push of the moving contact.

[0010] Optionally, the contact support has a second opening communicating with the first opening on both sides of the first opening;

[0011] Each second opening is provided with a first protective cover. The first protective cover includes a mounting frame and a flexible protective plate. The mounting frame is located on the top of the contact bracket. One end of the flexible protective plate is connected to the mounting frame, and the other end extends obliquely downward. The flexible protective plate is used to protect the second opening.

[0012] Optionally, the mounting bracket is provided with an inclined surface, and one end of the flexible protective plate is attached to and connected to the inclined surface.

[0013] Optionally, one end of the slide rail is provided with a limiting part, and the slide plate can abut against the limiting part under the pull of the first elastic member. One end of the first elastic member is connected to the limiting part, and the other end is connected to the slide plate.

[0014] Optionally, one end of the slide rail is bent to form the limiting portion.

[0015] Optionally, the slide rail is provided with an elongated hole, and a guide pin passes through the slide plate, with one end of the guide pin near the slide rail slidably connected to the elongated hole;

[0016] And / or, the top of the slide plate is provided with a connecting edge, and the surface of the connecting edge facing the slide rail is provided with a sliding groove, the sliding groove extends along the sliding direction of the slide plate and passes through the connecting edge, the slide rail is a plate-shaped structure, and the sliding groove is slidably connected to the top edge of the slide rail.

[0017] Optionally, the disconnector switch protection device further includes a contact protection structure for protecting the moving contact, the moving contact being disposed at one end of the conductive arm, and the contact protection structure comprising:

[0018] A connecting component is installed at the end of the conductive arm near the moving contact;

[0019] The support member has one end connected to the connecting assembly and the other end extending upwards.

[0020] The second protective cover is rotatably connected to the other end of the support member. The second protective cover has a second protective state covering the moving contact and a second avoidance state away from the moving contact.

[0021] The second elastic element is configured to always have a tendency to pull the second protective cover to rotate to the second protective state;

[0022] During the process of the conductive arm rotating in the closing direction and driving the moving contact into the contact bracket, the second protective cover is in the second protective state and is higher than the contact bracket under the pull of the second elastic element; during the process of the conductive arm driving the moving contact to rotate around the axis of the conductive arm so that the moving contact contacts the contact finger set in the contact bracket, the second protective cover abuts against the contact bracket and rotates to the second avoidance state.

[0023] Optionally, the connection component includes:

[0024] A first clamping element is disposed at the lower end of the conductive arm;

[0025] The second clamping member is disposed at the upper end of the conductive arm, and the support member is connected to the second clamping member;

[0026] Fasteners connect the first clamping member and the second clamping member to clamp the conductive arm.

[0027] Optionally, the second protective cover includes a flat plate portion and guide edges disposed on both sides of the flat plate portion, the guide edges being disposed at an angle downward away from the flat plate portion.

[0028] According to another aspect of the present invention, the present invention also provides a disconnecting switch, including a stationary contact assembly, a moving contact, and a disconnecting switch protection device as described in any of the above technical solutions, wherein the contact finger protection structure of the disconnecting switch protection device is used to protect the stationary contact assembly.

[0029] The beneficial effects of this utility model are:

[0030] This utility model provides a disconnecting switch protection device, including a contact finger protection structure for protecting the stationary contact assembly, which includes a contact support. The contact finger protection structure includes a slide rail, a sliding plate, and a first elastic element. When the disconnecting switch is in the open state, the sliding plate is held in a first protective state, blocking the first opening of the contact support, under the pull of the first elastic element, to protect the contact fingers inside the contact support. During the closing process of the disconnecting switch, the moving contact can contact the sliding plate and push the sliding plate from the first protective state to a first clearance state, opening the first opening, to ensure that the moving contact can normally close with the stationary contact assembly. That is, this disconnecting switch protection device can protect the contact fingers during the opening process while ensuring that the disconnecting switch can open and close normally, reducing the risk of contact finger icing and thus improving the reliability of the disconnecting switch.

[0031] The skateboard switches between a first protective state and a first avoidance state by sliding, and its structure is simple and easy to operate.

[0032] This utility model also provides a disconnecting switch, including a stationary contact assembly, a moving contact, and the aforementioned disconnecting switch protection device. Because this disconnecting switch employs the aforementioned disconnecting switch protection device, it has a lower risk of icing and higher operational reliability. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0034] Figure 1 This is a schematic diagram of the disconnecting switch in the open state provided in this embodiment of the utility model;

[0035] Figure 2 yes Figure 1 Enlarged view at point A;

[0036] Figure 3 This is a schematic diagram of the skateboard in the first protective state provided in an embodiment of the present invention;

[0037] Figure 4 This is a schematic diagram of the skateboard in the first avoidance state provided in an embodiment of the present utility model;

[0038] Figure 5 This is a partial view of a schematic diagram of the disconnecting switch in the closed state provided in an embodiment of this utility model;

[0039] Figure 6 This is a schematic diagram of the cooperation between the slide rail and the slide plate provided in this embodiment of the utility model;

[0040] Figure 7 This is a partial schematic diagram of the first protective cover provided in an embodiment of the present utility model;

[0041] Figure 8 This is an assembly diagram of the contact protection structure and the moving contact provided in this embodiment of the utility model.

[0042] In the picture:

[0043] 10. Stationary contact assembly; 11. Contact support; 101. First opening; 102. Second opening; 12. Contact finger; 20. Moving contact; 30. Conductive arm;

[0044] 100. Finger protection structure; 110. Slide rail; 111. Limiting part; 112. Elongated hole; 113. Connecting edge; 1131. Slide groove; 120. Slide plate; 130. First elastic element; 140. Guide pin; 150. First protective cover; 151. Mounting bracket; 1511. Inclined surface; 152. Flexible protective plate;

[0045] 200. Contact protection structure; 210. Connecting assembly; 211. First clamping member; 212. Second clamping member; 213. Fastener; 220. Support member; 230. Second protective cover; 231. Flat plate section; 232. Guide edge; 240. Second elastic member. Detailed Implementation

[0046] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0047] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0048] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0050] like Figure 1 and Figure 2 As shown, the disconnecting switch includes a stationary contact assembly and a moving contact. The stationary contact assembly includes a contact support and a contact finger disposed within the contact support. In one possible embodiment, the moving contact can rotate to contact the contact finger, thereby closing the disconnecting switch; the moving contact can also rotate to separate from the contact finger, thereby opening the disconnecting switch.

[0051] This embodiment provides a disconnector switch protection device that can effectively protect the contact fingers, reduce the risk of icing on the contact fingers, and thus improve the reliability of the disconnector switch operation.

[0052] Specifically, see [link to relevant documentation] Figure 1 and Figure 2 The disconnector switch protection device includes a contact finger protection structure 100. The contact finger protection structure 100 is used to protect the contact fingers 12 of the stationary contact assembly 10.

[0053] The finger protection structure 100 includes a slide rail 110, a slide plate 120, and a first elastic element 130. The slide rail 110 is mounted on the contact support 11. The slide plate 120 is slidably connected to the slide rail 110.

[0054] like Figure 2 and Figure 3 As shown, the slide plate 120 has a first protective state that blocks the first opening 101 on the side of the contact bracket 11. When the disconnecting switch is in the open state, the slide plate 120 can move to the first protective state under the pull of the first elastic member 130 to protect the contact finger 12 inside the contact bracket 11.

[0055] like Figure 4 and Figure 5 As shown, the slide plate 120 also has a first clearance state with the first opening 101 open. During the closing process of the disconnecting switch, the moving contact 20 will contact the slide plate 120 and push the slide plate 120 from the first protection state to the first clearance state, so that the moving contact 20 can contact the contact finger 12 to realize the closing.

[0056] This disconnector switch protection device ensures the normal opening and closing of the disconnector switch while protecting the contact finger 12 during opening, reducing the risk of ice accumulation on the contact finger 12 and thus improving the reliability of the disconnector switch. Furthermore, the sliding plate 120 switches between the first protection state and the first avoidance state via a sliding mechanism, resulting in a simple structure and easy operation.

[0057] Furthermore, such as Figure 2 and Figure 5 As shown, one end of the slide rail 110 is provided with a limiting part 111, and the slide plate 120 can abut against the limiting part 111 under the pull of the first elastic member 130. By setting the limiting part 111 to restrict the movement of the slide plate 120, the reliability of the slide plate 120 maintaining the first protective state is improved. Optionally, one end of the first elastic member 130 is connected to the limiting part 111, and the other end is connected to the slide plate 120.

[0058] Alternatively, in one possible embodiment, one end of the slide rail 110 is bent to form a limiting portion 111. This configuration results in a simple structure and facilitates manufacturing.

[0059] Optionally, such as Figures 2-4 As shown, in one possible embodiment, the slide rail 110 has an elongated hole 112, and a guide pin 140 passes through the slide plate 120. The end of the guide pin 140 near the slide rail 110 is slidably connected to the elongated hole 112. The sliding connection between the slide plate 120 and the slide rail 110 is achieved through the cooperation of the guide pin 140 and the elongated hole 112. The structure is simple, and the smoothness and reliability of the slide plate 120's sliding are also good. It can be understood that the extending direction of the elongated hole 112 is the sliding direction of the slide plate 120.

[0060] Furthermore, one end of the first elastic member 130 is connected to the limiting part 111, and the other end of the first elastic member 130 is connected to the end of the guide pin 140 away from the slide rail 110. The first elastic member 130 is fixed by the limiting part 111 and the guide pin 140, which has a simple structure. In addition, the first elastic member 130 is located on the side of the slide plate 120 away from the slide rail 110, which facilitates assembly.

[0061] Optionally, the first elastic element 130 can be a spring, with one end of the spring hanging on the guide pin 140 and the other end hanging on the through hole of the limiting part 111. This configuration is simple in structure and easy to assemble.

[0062] Optionally, such as Figure 6As shown, in another possible embodiment, the top of the slide plate 120 is provided with a connecting edge 113, and a groove 1131 is provided on the surface of the connecting edge 113 facing the slide rail 110. The groove 1131 extends along the sliding direction of the slide plate 120 and passes through the connecting edge 113. The slide rail 110 has a plate-like structure, and the groove 1131 is slidably connected to the top edge of the slide rail 110. With this configuration, the slide plate 120 can be hung on the slide rail 110 through the connecting edge 113, which helps to improve the connection strength between the slide plate 120 and the slide rail 110. Furthermore, the sliding connection between the slide plate 120 and the slide rail 110 is achieved through the cooperation of the groove 1131 and the slide rail 110, resulting in a simple structure and better smoothness and stability of the slide plate 120.

[0063] In this embodiment, the slide rail 110 has an elongated hole 112, and a guide pin 140 passes through the slide plate 120. The end of the guide pin 140 near the slide rail 110 is slidably connected to the elongated hole 112. Furthermore, the top of the slide plate 120 has a connecting edge 113, and the surface of the connecting edge 113 facing the slide rail 110 has a sliding groove 1131. The sliding groove 1131 extends along the sliding direction of the slide plate 120 and passes through the connecting edge 113. The slide rail 110 has a plate-like structure, and the sliding groove 1131 is slidably connected to the top edge of the slide rail 110. That is, in this embodiment, two sliding fit structures are provided between the slide plate 120 and the slide rail 110, effectively improving the reliability of the sliding fit between the slide plate 120 and the slide rail 110.

[0064] Furthermore, such as Figure 2 , Figure 3 and Figure 7 As shown, on the contact support 11, there are second openings 102 on both sides of the first opening 101 that communicate with the first opening 101. In one possible embodiment, when the disconnecting switch is closed, the moving contact 20 enters the interior of the contact support 11 through the second opening 102 and the first opening 101 and contacts the contact finger 12. When the moving contact 20 moves to the closed position, the moving contact 20 is in the state of passing through the first opening 101.

[0065] Furthermore, each second opening 102 is provided with a corresponding first protective cover 150. The first protective cover 150 includes a mounting frame 151 and a flexible protective plate 152. The mounting frame 151 is located on the top of the contact support 11. One end of the flexible protective plate 152 is connected to the mounting frame 151, and the other end extends obliquely downward. The flexible protective plate 152 is used to protect the second opening 102.

[0066] By setting the first protective cover 150, the risk of rainwater entering the contact bracket 11 through the second opening 102 and coming into contact with the contact finger 12 is reduced, thereby reducing the risk of icing of the contact finger 12 and improving the reliability of the disconnecting switch.

[0067] The protective cover has a simple structure. By tilting the flexible protective plate 152, it can guide rainwater away from the second opening 102, resulting in good protection.

[0068] Understandably, during the closing process of the disconnecting switch, the moving contact 20 will enter the interior of the contact bracket 11 through the second opening 102. Therefore, the moving contact 20 will come into contact with the flexible protective plate 152. At this time, the flexible protective plate 152 can avoid the moving contact 20 through its own deformation properties, thereby ensuring that the moving contact 20 and the contact finger 12 can make reliable contact and achieve closing.

[0069] Optionally, see [link to relevant documentation] Figure 7 The mounting bracket 151 has an inclined surface 1511, and one end of the flexible protective plate 152 is attached to and connected to the inclined surface 1511. It can be understood that the inclination direction of the flexible protective plate 152 is the same as the inclination direction of the inclined surface 1511. That is, the inclination angle of the flexible protective plate 152 is limited by the connection between the inclined surface 1511 and the flexible protective plate 152. The structure is simple and easy to assemble.

[0070] Optionally, the flexible protective plate 152 and the inclined surface 1511 can be connected by bolts. The bolt connection structure is simple and easy to assemble.

[0071] Alternatively, in one possible embodiment, the included angle between the flexible protective plate 152 and the second opening 102 is 45°.

[0072] Furthermore, such as Figure 1 , Figure 5 and Figure 8 As shown, the disconnector switch protection device also includes a contact protection structure 200 for protecting the moving contact 20, which is located at one end of the conductive arm 30. By providing the contact protection structure 200, the risk of contact icing is reduced, further improving the reliability of the disconnector switch operation.

[0073] Optionally, such as Figure 1 , Figure 5 and Figure 8 As shown, the contact protection structure 200 includes a connecting component 210, a support member 220, a second protective cover 230, and a second elastic member 240.

[0074] The connecting component 210 is installed at the end of the conductive arm 30 near the moving contact 20. One end of the support member 220 is connected to the connecting component 210, and the other end extends upward. The second protective cover 230 is rotatably connected to the other end of the support member 220. The second protective cover 230 has a second protective state covering the moving contact 20 and a second avoidance state away from the moving contact 20. When the second protective cover 230 is in the second protective state, it can protect the moving contact 20 and prevent rainwater from falling on the moving contact 20, which could cause the moving contact 20 to freeze in cold winter weather. The second elastic member 240 is configured to always have a tendency to pull the second protective cover 230 to rotate to the second protective state.

[0075] It is worth noting that the length of the support member 220 is set according to actual needs to ensure that the second protective cover 230 is located above the contact support 11 during the closing process of the moving contact 20, so as to avoid mutual interference between the second protective cover 230 and the contact support 11.

[0076] Specifically, during the process of the conductive arm 30 rotating in the closing direction to drive the moving contact 20 into the contact support 11, the second protective cover 230 is in the second protective state and is higher than the contact support 11 under the pull of the second elastic element (240).

[0077] As the conductive arm 30 drives the moving contact 20 to rotate around the axis of the conductive arm 30, the moving contact 20 comes into contact with the contact finger 12 located in the contact support 11. During this process, the second protective cover 230 abuts against the contact support 11 and rotates to the second avoidance state.

[0078] To facilitate understanding, the working principle of the contact protection structure 200 during the closing and opening processes is briefly introduced below:

[0079] like Figure 1 and Figure 8 As shown, at this time, the moving contact 20 is in the open position, separated from the stationary contact assembly 10. When the disconnecting switch begins to close, the conductive arm 30 drives the moving contact 20 to rotate in the closing direction, and the moving contact 20 gradually approaches the stationary contact assembly 10, as shown. Figure 5 As shown, the moving contact 20 first contacts the flexible protective plate 152 and pushes it to deform. As the moving contact 20 moves further, it contacts the sliding plate 120 and pushes it towards the first avoidance state. During this process, the moving contact 20 gradually enters the contact support 11. To ensure the reliability of the closing movement of the moving contact 20, the support member 220 should be made higher to ensure that the second protective cover 230 is located above the contact support 11. (Continue to see...) Figure 5When the moving contact 20 reaches its position, it rotates around the axis of the conductive arm 30 under the influence of the conductive arm 30, eventually contacting the contact finger 12 to achieve closing. During this process, the second protective cover 230 abuts against the contact support 11 and rotates to the second clearance state due to the limiting action of the contact support 11. When the disconnecting switch is opened, the conductive arm 30 drives the moving contact 20 to rotate and reset around the axis of the conductive arm 30. During this process, the second protective cover 230 resets to the second protection state under the action of the second elastic element 240 to protect the moving contact 20. Afterward, the conductive arm 30 drives the moving contact 20 to rotate away from the stationary contact assembly 10 along the opening direction.

[0080] The contact protection structure 200 ensures the reliability of the moving contact 20 during closing and opening operations, while also protecting the moving contact 20 after opening. It has a simple structure and good protection reliability.

[0081] Optionally, such as Figure 5 As shown, in one possible embodiment, the connecting assembly 210 includes a first clamping member 211, a second clamping member 212, and a fastener 213. The first clamping member 211 is located at the lower end of the conductive arm 30. The second clamping member 212 is located at the upper end of the conductive arm 30, and the support member 220 is connected to the second clamping member 212. The fastener 213 connects the first clamping member 211 and the second clamping member 212, so that the first clamping member 211 clamps the conductive arm 30. The connection between the connecting assembly 210 and the conductive arm 30 is achieved through clamping, resulting in a simple structure that facilitates installation and disassembly.

[0082] Furthermore, the first clamping member 211 can be a clamping rod, which can have an arc surface that contacts the conductive arm 30. This configuration increases the contact area between the clamping rod and the conductive arm 30, thereby improving the reliability of the clamping operation. Of course, the second clamping member 212 can also include a clamping rod and a connecting plate, with the connecting plate connected to the clamping rod and one end of the support member 220 connected to the connecting plate.

[0083] Optionally, the fastener 213 can be a bolt and nut assembly, which has a simple structure, is easy to assemble, and has good connection reliability.

[0084] Optionally, fasteners 213 can be provided at both ends of the first clamping member 211 and the second clamping member 212, that is, the fasteners 213 are located on both sides of the conductive arm 30 in the radial direction. This arrangement makes the clamping effect of the first clamping member 211 and the second clamping member 212 on the conductive arm 30 better, and improves the reliability of the connection between the connecting component 210 and the conductive arm 30.

[0085] Optionally, the support member 220 can be a pin.

[0086] Optionally, the second elastic element 240 can be a torsion spring, with the helical portion of the torsion spring sleeved on the support 220. The first torsion arm of the torsion spring is connected to the connecting assembly 210, and the second torsion arm is connected to the second protective cover 230.

[0087] Furthermore, such as Figure 8 As shown, the second protective cover 230 includes a flat plate portion 231 and guide edges 232 disposed on both sides of the flat plate portion 231. The guide edges 232 are inclined downwards away from the flat plate portion 231. This arrangement allows rainwater to be guided away from the moving contact 20 through the guide edges 232, further improving the protective effect.

[0088] This embodiment also provides a disconnecting switch, including a stationary contact assembly 10, a moving contact 20, and the aforementioned disconnecting switch protection device. The contact finger protection structure 100 of the disconnecting switch protection device is used to protect the stationary contact assembly 10.

[0089] Because of the aforementioned disconnector protection device, this disconnector has a low risk of icing and high operational reliability.

[0090] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Disconnector guard, characterized in that Includes a finger protection structure (100) for protecting a stationary contact assembly (10), the stationary contact assembly (10) including a contact support (11), the side of which is provided with a first opening (101); The finger protection structure (100) includes a slide rail (110), a slide plate (120) and a first elastic element (130). The slide rail (110) is disposed on the contact support (11), and the slide plate (120) is slidably connected to the slide rail (110). The slide plate (120) has a first avoidance state with the first opening (101) open and a first protection state with the first opening (101) blocked. The slide plate (120) can move to the first protection state under the pull of the first elastic member (130) and can move from the first protection state to the first avoidance state under the push of the moving contact (20).

2. The disconnector guard according to claim 1, characterized in that On the contact support (11), a second opening (102) communicating with the first opening (101) is provided on both sides of the first opening (101); Each second opening (102) is provided with a first protective cover (150). The first protective cover (150) includes a mounting bracket (151) and a flexible protective plate (152). The mounting bracket (151) is located on the top of the contact support (11). One end of the flexible protective plate (152) is connected to the mounting bracket (151), and the other end extends obliquely downward. The flexible protective plate (152) is used to protect the second opening (102).

3. The disconnector guard according to claim 2, characterized in that The mounting bracket (151) is provided with an inclined surface (1511), and one end of the flexible protective plate (152) is attached to the inclined surface (1511) and connected to the inclined surface (1511).

4. The disconnector guard according to claim 1, characterized in that One end of the slide rail (110) is provided with a limiting part (111), and the slide plate (120) can abut against the limiting part (111) under the pull of the first elastic member (130). One end of the first elastic member (130) is connected to the limiting part (111), and the other end is connected to the slide plate (120).

5. The disconnector guard according to claim 4, characterized in that One end of the slide rail (110) is bent to form the limiting part (111).

6. The disconnector guard according to claim 1, characterized in that The slide rail (110) is provided with an elongated hole (112), and a guide pin (140) passes through the slide plate (120). The end of the guide pin (140) near the slide rail (110) is slidably connected to the elongated hole (112). And / or, the top of the slide plate (120) is provided with a connecting edge (113), and the connecting edge (113) is provided with a groove (1131) on the plate surface facing the slide rail (110). The groove (1131) extends along the sliding direction of the slide plate (120) and passes through the connecting edge (113). The slide rail (110) is a plate-shaped structure, and the groove (1131) is slidably connected to the top edge of the slide rail (110).

7. The disconnector switch protection device according to any one of claims 1-6, characterized in that, The disconnector switch protection device further includes a contact protection structure (200) for protecting the moving contact (20), the moving contact (20) being disposed at one end of the conductive arm (30), and the contact protection structure (200) comprising: A connecting component (210) is installed at one end of the conductive arm (30) near the moving contact (20); The support member (220) is connected at one end to the connecting assembly (210) and extends upward at the other end; The second protective cover (230) is rotatably connected to the other end of the support member (220). The second protective cover (230) has a second protective state covering the moving contact (20) and a second avoidance state away from the moving contact (20). The second elastic element (240) is configured to always have a tendency to pull the second protective cover (230) to rotate to the second protective state; During the process of the conductive arm (30) rotating in the closing direction to drive the moving contact (20) into the contact bracket (11), the second protective cover (230) is in the second protective state and higher than the contact bracket (11) under the pull of the second elastic element (240); during the process of the conductive arm (30) driving the moving contact (20) to rotate around the axis of the conductive arm (30) to make the moving contact (20) contact the contact finger (12) set in the contact bracket (11), the second protective cover (230) abuts against the contact bracket (11) and rotates to the second avoidance state.

8. The disconnector switch protection device according to claim 7, characterized in that, The connection component (210) includes: The first clamping member (211) is disposed at the lower end of the conductive arm (30); The second clamping member (212) is disposed at the upper end of the conductive arm (30), and the support member (220) is connected to the second clamping member (212); Fastener (213) connects the first clamp (211) and the second clamp (212) so that the first clamp (211) and the second clamp (212) clamp the conductive arm (30).

9. The disconnector switch protection device according to claim 7, characterized in that, The second protective cover (230) includes a flat plate portion (231) and guide edges (232) disposed on both sides of the flat plate portion (231), wherein the guide edges (232) are disposed obliquely downward away from the flat plate portion (231).

10. A disconnecting switch, characterized in that, The device includes a stationary contact assembly (10), a moving contact (20), and a disconnector protection device according to any one of claims 1-9, wherein the finger protection structure (100) of the disconnector protection device is used to protect the stationary contact assembly (10).

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