Vertical opening type disconnecting switch main grounding knife mechanical interlocking device and disconnecting switch

Abstract

The utility model provides a main grounding knife mechanical interlocking device of a vertical opening type disconnecting switch and the disconnecting switch, which comprises a frame body, a main knife operating shaft, a grounding knife operating shaft, a main knife limiting disc, a grounding knife limiting disc and a limiting rod, and is characterized in that the main knife operating shaft and the grounding knife operating shaft are rotationally connected to the frame body; the main knife limiting disc is coaxially and fixedly connected to the main knife operating shaft, the ground knife limiting disc is coaxially and fixedly connected to the ground knife operating shaft, a first groove is formed in the main knife limiting disc, a second groove is formed in the ground knife limiting disc, and the limiting rod is arranged in a sliding mode in the direction of the connecting line of the center of the main knife limiting disc and the center of the ground knife limiting disc; when the main cutter limiting disc rotates, the end, away from the main cutter limiting disc, of the limiting rod is located in the second groove, and the end, close to the main cutter limiting disc, of the limiting rod is located outside the first groove. According to the mechanical locking device, the number of parts of the whole structure is small, connection is tight, the situations of jamming and locking incapability are not likely to occur, the failure rate is reduced while mechanical locking is met, and the stability of equipment operation is improved.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage disconnect switch technology, specifically to a mechanical interlocking device for the main grounding switch of a vertical disconnect switch and a disconnect switch. Background Technology

[0002] In power transmission and distribution systems, outdoor high-voltage disconnect switches often use the main disconnector and grounding disconnector together (in AC voltage levels, 1kV and below are generally referred to as low voltage, above 1kV and below 35kV as medium voltage, and above 35kV and below 220kV as high voltage). Due to their size, vertical disconnect switches mostly use a manual mechanism with built-in interlocking to achieve interlocking. When such a mechanism is not applicable to the main disconnector and grounding disconnector, in order to prevent misoperation and ensure the safe operation of the power grid, a mechanical interlock must be installed between the main disconnector and grounding disconnector to ensure that the grounding disconnector cannot be closed when the main disconnector of the disconnect switch is closed, and the main disconnector of the disconnect switch cannot be closed when the grounding disconnector is closed (it should be noted that the main and grounding disconnectors mentioned in the title refer to both the main disconnector and the grounding disconnector).

[0003] Existing mechanical interlocking devices for disconnecting switches often employ a multi-link connection. Taking CN117976457A as an example, it includes a main rotating plate, interlocking linkages, a support shaft, a locking plate, and a grounding rotating plate. The main rotating plate is mounted on the rotating shaft of the main disconnect switch. The support shaft is mounted on the base frame and located between the rotating shafts of the main disconnect switch and the grounding disconnect switch. The locking plate is rotatably connected to the support shaft. The grounding rotating plate is mounted on the rotating shaft of the grounding disconnect switch. The interlocking linkages connect the main rotating plate and the locking plate. When the main disconnect switch is connected to the first terminal, the locking plate is positioned on the rotation trajectory of the grounding rotating plate to prevent the grounding disconnect switch from rotating towards the second terminal. When the grounding disconnect switch is connected to the second terminal, the grounding rotating plate is positioned on the rotation trajectory of the locking plate to prevent the main disconnect switch from rotating towards the second terminal. The interlocking linkages are hinged to the main rotating plate via rotating pins, and the interlocking linkages are also hinged to the locking plate via rotating pins (from the appendix of the prior art). Figure 4 and attached Figure 6 As can be seen from the diagram, this locking device has many parts, resulting in higher production costs. Furthermore, due to the large number of parts and the complex structure, it is prone to jamming or the rotating pin falling off, leading to malfunctions that prevent normal operation.

[0004] In summary, there is an urgent need for a vertically opening disconnector main grounding switch mechanical interlock device and disconnector switch to solve or at least partially solve the problems existing in the prior art. Utility Model Content

[0005] The purpose of this utility model is to provide a mechanical interlocking device for the main grounding switch of a vertically opening disconnector and the disconnector itself, aiming to solve the problems of complex structure and high failure rate in existing technologies. The specific technical solution is as follows:

[0006] A mechanical interlock device for the main and grounding switches of a vertically opening disconnector includes a frame, a main switch operating shaft, and a grounding switch operating shaft. Both the main switch operating shaft and the grounding switch operating shaft are rotatably connected to the frame. The device also includes a main switch limiting plate, a grounding switch limiting plate, and a limiting rod. The main switch limiting plate is coaxially and fixedly connected to the main switch operating shaft, and the grounding switch limiting plate is coaxially and fixedly connected to the grounding switch operating shaft. The main switch limiting plate has a first groove, and the grounding switch limiting plate has a second groove. The limiting rod is slidably arranged along the line connecting the center of the main switch limiting plate and the center of the grounding switch limiting plate. When the main switch limiting plate rotates, the end of the limiting rod away from the main switch limiting plate is in the second groove, and the end of the limiting rod near the main switch limiting plate is outside the first groove. When the grounding switch limiting plate rotates, the end of the limiting rod away from the grounding switch limiting plate is in the first groove, and the end of the limiting rod near the grounding switch limiting plate is outside the second groove.

[0007] Preferably, the main cutter limiting plate, the limiting rod, and the ground cutter limiting plate satisfy the following relationship:

[0008]

[0009] Wherein, D1 is the diameter of the main blade limiting plate; D2 is the diameter of the ground blade limiting plate; H1 is the depth of the first groove; H2 is the depth of the second groove; L1 is the distance between the center of the main blade limiting plate and the center of the ground blade limiting plate; and L2 is the total length of the limiting rod.

[0010] Preferably, the main cutter operating shaft is used to control the external main cutter gate, and the ground cutter operating shaft is used to control the external ground cutter gate. When the first groove is opposite to the limit rod, the external main cutter gate is in the open position, and when the second groove is opposite to the limit rod, the external ground cutter gate is in the open position.

[0011] Preferably, the main blade limiting plate has a first circumferential surface, a first concave surface and a first transition surface, and the first circumferential surface and the first concave surface are smoothly connected by the first transition surface;

[0012] The ground knife limiting plate has a second circumferential surface, a second concave surface, and a second transition surface. The second circumferential surface and the second concave surface are smoothly connected through the second transition surface.

[0013] Preferably, when the limiting rod abuts against the second circumferential surface, the end of the limiting rod away from the second circumferential surface is inserted into the first groove, and when the limiting rod abuts against the first circumferential surface, the end of the limiting rod away from the first circumferential surface is inserted into the second groove.

[0014] Preferably, two sets of main blade limiting plates, ground blade limiting plates, and limiting rods are arranged, with the two sets of main blade limiting plates, ground blade limiting plates, and limiting rods symmetrically arranged at both ends of the frame.

[0015] Preferably, it also includes a mounting bracket, which is fixedly connected to the frame, and the limiting rod is slidably connected to the mounting bracket.

[0016] Preferably, the mounting bracket is provided with a sliding sleeve, which is arranged along the line connecting the center of the main cutter limiting plate and the center of the ground cutter limiting plate, and the limiting rod is slidably connected inside the sliding sleeve.

[0017] Preferably, the sliding sleeve is made of a wear-resistant material.

[0018] On the other hand, this application also provides a disconnecting switch, the specific solution of which is as follows:

[0019] A disconnecting switch includes the aforementioned vertical disconnecting switch main grounding mechanical interlock device, and further includes a first insulator, a first contact, a second insulator, a second contact, a main disconnect switch, an operating insulator, a rocker arm, and a grounding switch. The first and second insulators are fixedly connected to the frame at intervals. The first contact is fixedly connected to the top of the first insulator, and the second contact is fixedly connected to the top of the second insulator. The rocker arm is fixedly connected to the outer wall of the main disconnect operating shaft. The main disconnect switch is connected to the end of the rocker arm away from the main disconnect operating shaft via the operating insulator. The first end of the operating insulator is hinged to the rocker arm, and the second end of the operating insulator is hinged to the middle of the main disconnect switch. The grounding switch is fixedly connected to the outer wall of the grounding switch operating shaft.

[0020] The application of the technical solution of this utility model has the following beneficial effects:

[0021] When it is necessary to close the external main switch, rotate the grounding switch operating shaft so that the second groove of the grounding switch limit plate aligns with the limit rod. At this time, the external grounding switch is in the open state. Rotating the main switch operating shaft closes the external main switch. At this time, the main switch limit plate drives one end of the limit rod to move into the second groove and limits the grounding switch limit plate, thus preventing accidental operation of the grounding switch operating shaft when the external main switch is closed. When it is necessary to close the grounding switch, rotate the main switch operating shaft so that the first groove of the main switch limit plate aligns with the limit rod. At this time, the external main switch is in the open state. Rotating the grounding switch operating shaft closes the external grounding switch. At this time, the grounding switch limit plate drives one end of the limit rod to move into the first groove and limits the main switch limit plate, thus preventing accidental operation of the main switch operating shaft when the external grounding switch is closed. This achieves the function of mechanical interlocking between the main switch operating shaft and the grounding switch operating shaft.

[0022] In addition, the overall structure of this application has fewer parts and tighter connections, making it less prone to jamming and locking failures. While satisfying mechanical locking requirements, it reduces the failure rate and improves the stability of equipment operation, while also reducing the production cost of the equipment.

[0023] In addition to the objectives, features, and advantages described above, this utility model has other objectives, features, and advantages. These will be described below with reference to... Figures 1-7 The present invention will be described in further detail below. Attached Figure Description

[0024] The accompanying drawings, which form part of this application, are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0025] Figure 1 This is one of the overall structural schematic diagrams of a mechanical interlocking device for the main grounding switch of a vertically opening disconnector according to this application;

[0026] Figure 2 This is the second schematic diagram of the overall structure of the mechanical interlocking device for the main grounding switch of a vertically opening disconnector according to this application;

[0027] Figure 3 This is the third schematic diagram of the overall structure of the mechanical interlocking device for the main grounding switch of a vertically opening disconnector according to this application;

[0028] Figure 4 This is an enlarged view of the main blade limit plate in the mechanical interlock device of the main blade of a vertically opening disconnector switch according to this application;

[0029] Figure 5 This is an enlarged view of the grounding limit plate in the mechanical interlocking device of the main grounding switch of a vertically opening disconnector according to this application;

[0030] Figure 6 This is a schematic diagram of the overall structure of a disconnecting switch in the open state according to this application;

[0031] Figure 7 This is a schematic diagram of the overall structure of a disconnecting switch in the closed state according to this application.

[0032] The components are as follows: 1. Frame; 2. Main knife operating shaft; 3. Ground knife operating shaft; 4. Main knife limiting plate; 41. First groove; 42. First circumferential surface; 43. First concave surface; 44. First transition surface; 5. Ground knife limiting plate; 51. Second groove; 52. Second circumferential surface; 53. Second concave surface; 54. Second transition surface; 6. Limiting rod; 7. Main knife switch; 8. Ground knife switch; 9. Mounting frame; 91. Sliding sleeve; 11. First insulator; 12. First contact; 13. Second insulator; 14. Second contact; 15. Operating insulator; 16. Rocker arm. Detailed Implementation

[0033] To facilitate understanding of this invention, a more comprehensive description is provided below, along with preferred embodiments. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of this invention.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

[0035] Example:

[0036] See Figures 1-7 This embodiment provides a mechanical interlock device for the main and grounding switches of a vertically opening disconnector, including a frame 1, a main operating shaft 2, and a grounding switch operating shaft 3. Both the main operating shaft 2 and the grounding switch operating shaft 3 are rotatably connected to the frame 1. It also includes a main operating limit plate 4, a grounding switch limit plate 5, and a limit rod 6. The main operating limit plate 4 is coaxially and fixedly connected to the main operating shaft 2, and the grounding switch limit plate 5 is coaxially and fixedly connected to the grounding switch operating shaft 3. The main operating limit plate 4 has a first groove 41, and the grounding switch limit plate 5 has a second groove 42. The second groove 51 has a limiting rod 6 that slides along the line connecting the center of the main blade limiting plate 4 and the center of the ground blade limiting plate 5. When the main blade limiting plate 4 rotates, the end of the limiting rod 6 away from the main blade limiting plate 4 is in the second groove 51, and the end of the limiting rod 6 near the main blade limiting plate 4 is outside the first groove 41. When the ground blade limiting plate 5 rotates, the end of the limiting rod 6 away from the ground blade limiting plate 5 is in the first groove 41, and the end of the limiting rod 6 near the ground blade limiting plate 5 is outside the second groove 51.

[0037] Specifically, the main blade operating shaft 2 is rotatably connected to the frame 1 via bearings, and the ground blade operating shaft 3 is also rotatably connected to the frame 1 via bearings. The main blade operating shaft 2 and the ground blade operating shaft 3 are arranged parallel to each other. When the main blade limiting disc 4 rotates, the limiting rod 6 slides and inserts into the second groove 51 to keep the ground blade disc in a limited position. When the ground blade limiting disc 5 rotates, the limiting rod 6 slides and inserts into the first groove 41 to keep the main blade disc in a limited position.

[0038] Understandably, when it is necessary to close the external main switch 7, the grounding switch operating shaft 3 is rotated so that the second groove 51 of the grounding switch limit plate 5 corresponds to the limit rod 6. At this time, the external grounding switch 8 is in the open state. The main switch operating shaft 2 is rotated to close the external main switch 7. At this time, the main switch limit plate 4 drives one end of the limit rod 6 to move into the second groove 51 and limits the grounding switch limit plate 5, thereby preventing the grounding switch operating shaft 3 from being closed when the external main switch 7 is closed. To prevent accidental operation, when the grounding switch needs to be closed, the main blade operating shaft 2 is rotated so that the first groove 41 of the main blade limiting disk 4 aligns with the limiting rod 6. At this time, the external main blade switch 7 is in the open state. Rotating the grounding switch operating shaft 3 closes the external grounding switch 8. At this time, the grounding switch limiting disk 5 drives one end of the limiting rod 6 to move into the first groove 41 and limits the main blade limiting disk 4, thereby preventing accidental operation of the main blade operating shaft 2 when the external grounding switch 8 is closed. The overall structure of this application has fewer parts and tighter connections, making it less prone to jamming and locking failures. While meeting mechanical locking requirements, it reduces the failure rate and improves the stability of equipment operation. On the other hand, it also reduces the production cost of the equipment.

[0039] In some embodiments, the main blade limiting disc 4 is fixedly connected to the main blade operating shaft 2 by welding, and the ground blade limiting disc 5 is also fixedly connected to the ground blade operating shaft 3 by welding. In other embodiments, the main blade limiting disc 4 has a through hole in the middle, and the main blade limiting disc 4 is sleeved on the main blade operating shaft 2 through the through hole. The end face of the main blade limiting disc 4 has a flange protruding outward, and a first clamping screw is provided radially on the flange. The first clamping screw is threaded onto the flange, and the end of the first clamping screw abuts against the outer surface of the main blade operating shaft 2, thereby fixing the main blade limiting disc 4 to the main blade operating shaft 2. When it is necessary to adjust the relative position of the main blade limiting disc 4 and the main blade operating shaft 2, simply loosen the first clamping screw to adjust the relative position of the main blade limiting disc 4 on the main blade operating shaft 2. Similarly, the ground knife limit plate 5 is also provided with through holes. The end of the ground knife limit plate 5 has a flange protruding outward. A second clamping screw is radially provided on the flange. The ground knife limit plate 5 is fixedly connected to the ground knife operating shaft 3 by the second clamping screw.

[0040] In a preferred embodiment, the main blade limiting plate 4, the limiting rod 6, and the ground blade limiting plate 5 satisfy the following relationship:

[0041]

[0042] Wherein, D1 is the diameter of the main blade limiting plate 4; D2 is the diameter of the ground blade limiting plate 5; H1 is the depth of the first groove 41; H2 is the depth of the second groove 51; L1 is the distance between the center of the main blade limiting plate 4 and the center of the ground blade limiting plate 5; and L2 is the total length of the limiting rod 6.

[0043] Understandably, assuming that the diameters of the main cutter limiting plate 4 (D1), the ground cutter limiting plate 5 (D2), the depths of the first groove 41 (H1), the second groove 51 (H2), and the distance between the center of the main cutter limiting plate 4 and the center of the ground cutter limiting plate 5 (L1) remain unchanged, the length of the limiting rod 6 is limited by the above-mentioned relationship, ensuring that the limiting rod 6 is within a suitable length range. If the length of the limiting rod 6 is insufficient, it cannot effectively limit the main cutter limiting plate 4 and the ground cutter limiting plate 5, thus losing its limiting function. If the length of the limiting rod 6 is too long, the mechanical interlocking device cannot be installed, meaning the limiting rod 6 cannot be installed between the main cutter limiting plate 4 and the ground cutter limiting plate 5.

[0044] In a preferred embodiment, the main blade operating shaft 2 is used to control the external main blade gate 7, and the ground blade operating shaft 3 is used to control the external ground blade gate 8. When the first groove 41 is opposite to the limit rod 6, the external main blade gate 7 is in the open position. When the second groove 51 is opposite to the limit rod 6, the external ground blade gate 8 is in the open position.

[0045] Understandably, with this arrangement, when the first groove 41 is opposite to the limit rod 6, the external main switch 7 is in the open state. At this time, the ground switch operating shaft 3 can be rotated, which in turn drives the ground switch limit plate 5 to rotate. During the rotation of the ground switch limit plate 5, the end of the limit rod 6 away from the ground switch limit plate 5 is pushed into the first groove 41 of the main switch limit plate 4, limiting the main switch limit plate 4 and the main switch operating shaft 2. Rotating the ground switch operating shaft 3 allows for convenient opening or closing operations of the external ground switch. Similarly, when the second groove 51 is opposite to the limit rod 6, the external ground switch 8 is in the open state, and rotating the main switch operating shaft 2 allows for convenient opening or closing operations of the external main switch.

[0046] In a preferred embodiment, the main blade limiting plate 4 has a first circumferential surface 42, a first concave surface 43 and a first transition surface 44, and the first circumferential surface 42 and the first concave surface 43 are smoothly connected through the first transition surface 44; the ground blade limiting plate 5 has a second circumferential surface 52, a second concave surface 53 and a second transition surface 54, and the second circumferential surface 52 and the second concave surface 53 are smoothly connected through the second transition surface 54.

[0047] Understandably, the first transition surface 44 smoothly transitions the first circumferential surface 42 and the first concave surface 43. The first concave surface 43 is an arc-shaped concave surface. During rotation, the arc-shaped concave surface and the transition surface guide the limiting rod 6. When the main blade limiting disk 4 rotates, the limiting rod 6 is guided, thus smoothly pushing the limiting rod 6 toward the ground blade limiting disk 5. The first transition surface 44 is an arc-shaped transition surface. Similarly, the second transition surface 54 smoothly transitions the second circumferential surface 52 and the second concave surface 53. The second concave surface 53 is an arc-shaped concave surface. During rotation, the arc-shaped concave surface and the transition surface guide the limiting rod 6. When the ground blade limiting disk 5 rotates, the limiting rod 6 is guided, thus smoothly pushing the limiting rod 6 toward the main blade limiting disk 4. The second transition surface 54 is an arc-shaped transition surface. In some other embodiments, the first concave surface 43 and the second concave surface 53 may also be V-shaped surfaces or other arc-shaped concave surfaces that can serve as guides, and the first transition surface 44 and the second transition surface 54 may also be other arc-shaped surfaces that can serve as smooth transitions.

[0048] In a preferred embodiment, when the limiting rod 6 abuts against the second circumferential surface 52, the end of the limiting rod 6 away from the second circumferential surface 52 is inserted into the first groove 41, and when the limiting rod 6 abuts against the first circumferential surface 42, the end of the limiting rod 6 away from the first circumferential surface 42 is inserted into the second groove 51.

[0049] Understandably, when the limiting rod 6 abuts against the second circumferential surface 52, the ground knife limiting plate 5 and the ground knife operating shaft 3 can rotate smoothly. At this time, the limiting rod 6 is inserted into the first groove 41, and the main knife limiting plate 4 and the main knife operating shaft 2 are in a limited state. Furthermore, the main knife gate 7 corresponding to the main knife operating rod is in an open state, thus limiting the main knife operating shaft 2 and the main knife limiting plate 4 when the ground knife operating shaft 3 is operated. Similarly, when the limiting rod 6 abuts against the first circumferential surface 42, the main knife limiting plate 4 and the main knife operating shaft 2 can rotate smoothly. At this time, the limiting rod 6 is inserted into the second groove 51, and the ground knife limiting plate 5 and the ground knife operating shaft 3 are in a limited state. Furthermore, the ground knife gate 8 corresponding to the ground knife operating rod is in an open state, thus limiting the ground knife operating shaft 3 and the ground knife limiting plate 5 when the main knife operating shaft 2 is operated.

[0050] In a preferred embodiment, two sets of main blade limiting disc 4, ground blade limiting disc 5 and limiting rod 6 are arranged, with the two sets of main blade limiting disc 4, ground blade limiting disc 5 and limiting rod 6 symmetrically arranged at both ends of the frame 1.

[0051] Understandably, by symmetrically arranging two sets, when the main blade operating shaft 2 rotates together with the main blade limiting discs 4 fixedly connected to both ends of the main blade operating shaft 2, it pushes the two limiting rods 6 towards the two ground blade limiting discs 5 at both ends of the ground blade operating shaft 3. This causes the two limiting rods 6 to insert into the two second grooves 51 of the two ground blade limiting discs 5, respectively, limiting the ground blade operating rods and the two ground blade limiting discs 5. This, in turn, limits the external grounding switch installed on the ground blade limiting discs 5, preventing the grounding switch 8 from closing due to misoperation of the external main blade switch 7 during closing, thus avoiding a safety accident. It can be seen that simultaneously limiting the ground blade limiting discs 5 at both ends of the ground blade operating shaft 3 or simultaneously limiting the main blade limiting discs 4 at both ends of the main blade operating shaft 2 makes the limiting force on the ground blade operating shaft 3 and the main blade operating shaft 2 more uniform and improves the limiting stability of the main blade limiting shaft and the ground blade limiting shaft.

[0052] In a preferred embodiment, the mechanical interlock device further includes a mounting frame 9, which is fixedly connected to the frame 1, and the limiting rod 6 is slidably connected to the mounting frame 9.

[0053] Understandably, the mounting bracket 9 is fixedly connected to one side of the frame 1 by welding or bolting. The mounting bracket 9 supports the limiting rod 6, allowing the limiting rod 6 to slide smoothly back and forth. In actual production, two mounting brackets 9 are arranged along the length of the limiting rod 6 to enhance the support and guiding effect on the limiting rod 6.

[0054] In a preferred embodiment, a sliding sleeve 91 is installed on the mounting bracket 9. The sliding sleeve 91 is arranged along the line connecting the center of the main blade limiting plate 4 and the center of the ground blade limiting plate 5. The limiting rod 6 is slidably connected inside the sliding sleeve 91.

[0055] Understandably, the sliding sleeve 91 guides the limiting rod 6, allowing it to slide along the line connecting the center of the main cutter limiting plate 4 and the center of the ground cutter limiting plate 5, thus improving the stability of the limiting rod 6's movement. In this embodiment, the sliding sleeve 91 is circular, and the limiting rod 6 is cylindrical, sliding through the sliding sleeve 91. Arranging the sliding sleeve 91 in a circular shape facilitates its production and processing. Furthermore, the prototype sliding sleeve 91 can be replaced with an oil-free bushing, which is a standard part that can be purchased directly without further manufacturing. Standard parts are often mass-produced, resulting in low manufacturing costs. When the bushing is damaged, it can be directly purchased and replaced, reducing subsequent maintenance costs and saving maintenance time, thereby enhancing the product's market competitiveness.

[0056] In a preferred embodiment, the two ends of the limiting rod 6 are arc-shaped, specifically, both ends of the limiting rod 6 are spherical.

[0057] Understandably, the spherical surface guides the limiting rod 6, allowing the first concave surface 43 on the first groove 41 or the second concave surface 53 on the second groove 51 to push the spherical surface on the limiting rod 6 to move during the rotation of the main blade limiting plate 4 and the ground blade limiting plate 5. Under the guidance of the spherical surface, the limiting rod 6 can slide back and forth more easily.

[0058] As a preferred embodiment, the slide sleeve 91 is made of a wear-resistant material.

[0059] As can be seen, the sliding sleeve 91 is made of wear-resistant material to increase its wear resistance and improve its service life. Additionally, the sliding sleeve 91 is made of a material with a low coefficient of friction, which reduces the sliding resistance of the limiting rod 6 when it slides back and forth within the sliding sleeve 91, making the sliding of the limiting rod 6 smoother. Specifically, the sliding sleeve 91 can be made of one of tin bronze, aluminum bronze, or polytetrafluoroethylene. Of course, in some other embodiments, the sliding sleeve 91 can also be made of other wear-resistant materials with a low coefficient of friction.

[0060] See Figures 1-7 This application also provides a disconnecting switch, the specific solution of which is as follows:

[0061] A disconnecting switch includes the aforementioned mechanical interlocking device for the main grounding switch of a vertical disconnecting switch, and further includes a first insulator 11, a first contact 12, a second insulator 13, a second contact 14, a main disconnector 7, an operating insulator 15, a rocker arm 16, and a grounding switch 8. The first insulator 11 and the second insulator 13 are fixedly connected to the frame 1 at intervals. The first contact 12 is fixedly connected to the top of the first insulator 11, and the second contact 14 is fixedly connected to the top of the second insulator 13. The rocker arm 16 is fixedly connected to the outer wall of the main disconnector operating shaft 2. The main disconnector 7 is connected to the end of the rocker arm 16 away from the main disconnector operating shaft 2 via the operating insulator 15. The first end of the operating insulator 15 is hinged to the rocker arm 16, and the second end of the operating insulator 15 is hinged to the middle of the main disconnector 7. The grounding switch 8 is fixedly connected to the outer wall of the grounding switch operating shaft 3.

[0062] As can be seen, taking the initial state of the main knife switch 7 being closed and the ground knife switch 8 being open as an example, in the initial state, the limit rod 6 is inserted into the second groove 51 of the ground knife limit plate 5, and the ground knife is restricted from rotating. At this time, the main knife limit plate 4 is in the unlocked state and can rotate. When high-voltage lines need maintenance, the disconnecting switch needs to be disconnected. The operator rotates the main blade operating shaft 2, which in turn rotates the rocker arm 16, thereby actuating the operating insulator 15 and the main blade switch 7, causing the main blade switch 7 to open and breaking the circuit between the first contact 12 and the second contact 14. After the main blade switch 7 opens, the first groove 41 on the main blade limit plate 4 is aligned with the limit rod 6. At this time, the grounding switch operating shaft 3 is driven to rotate, which in turn drives the grounding switch 8 to rotate. The second contact 14 has a grounding contact point until the grounding switch 8 rotates to connect with the grounding contact point. During the rotation of the grounding switch operating shaft 3, the grounding switch limit plate 5 is driven to rotate. The grounding switch limit plate 5 pushes the limit rod 6 to move into the first groove 41, limiting the main blade limit plate 4 and preventing misoperation of the main blade operating shaft 2, thus completing the disconnecting switch opening operation. Similarly, when the disconnecting switch needs to be closed, the grounding switch operating shaft 3 is rotated to open the grounding switch 8, so that the second groove 51 on the grounding switch limit plate 5 corresponds to the limit rod 6. At this time, the main switch limit plate 4 is unlocked. The main switch operating shaft 2 is rotated, which drives the main switch limit plate 4 to rotate. At this time, the main switch limit plate 4 pushes the limit rod 6 into the second groove 51 to limit the grounding switch limit plate 5, thereby preventing accidental operation of the grounding switch operating shaft 3. In addition, when the main switch operating shaft 2 rotates, it drives the rocker arm 16 to move. The rocker arm 16 drives the operating insulator 15 and the main switch 7 to move, so that the two ends of the main switch 7 are engaged with the first contact 12 and the second contact 14 respectively, realizing the closing operation of the main switch 7.

[0063] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mechanical interlock device for the main and grounding blades of a vertically opening disconnector switch, comprising a frame (1), a main blade operating shaft (2), and a grounding blade operating shaft (3), wherein the main blade operating shaft (2) and the grounding blade operating shaft (3) are rotatably connected to the frame (1), characterized in that: It also includes a main blade limiting plate (4), a ground blade limiting plate (5) and a limiting rod (6). The main blade limiting plate (4) is coaxially fixedly connected to the main blade operating shaft (2), and the ground blade limiting plate (5) is coaxially fixedly connected to the ground blade operating shaft (3). The main blade limiting plate (4) is provided with a first groove (41), and the ground blade limiting plate (5) is provided with a second groove (51). The limiting rod (6) is slidably arranged along the line connecting the center of the main blade limiting plate (4) and the center of the ground blade limiting plate (5). When the main blade limiting plate (4) rotates, the end of the limiting rod (6) away from the main blade limiting plate (4) is in the second groove (51), and the end of the limiting rod (6) close to the main blade limiting plate (4) is outside the first groove (41). When the ground knife limiting plate (5) rotates, the end of the limiting rod (6) away from the ground knife limiting plate (5) is in the first groove (41), and the end of the limiting rod (6) close to the ground knife limiting plate (5) is outside the second groove (51).

2. The mechanical interlocking device for the main grounding switch of a vertical disconnector according to claim 1, characterized in that: The main blade limiting plate (4), the limiting rod (6), and the ground blade limiting plate (5) satisfy the following relationship: Among them, D1 is the diameter of the main blade limiting plate (4); D2 is the diameter of the ground knife limiting disc (5); H1 is the depth of the first groove (41); H2 is the depth of the second groove (51); L1 is the distance between the center of the main blade limiting plate (4) and the center of the ground blade limiting plate (5); L2 is the total length of the limit rod (6).

3. The mechanical interlocking device for the main grounding switch of a vertical disconnector according to claim 2, characterized in that: The main blade operating shaft (2) is used to control the external main blade gate (7), and the ground blade operating shaft (3) is used to control the external ground blade gate (8). When the first groove (41) is opposite to the limit rod (6), the external main blade gate (7) is in the open position. When the second groove (51) is opposite to the limit rod (6), the external ground blade gate (8) is in the open position.

4. The mechanical interlocking device for the main grounding switch of a vertical disconnector according to claim 2, characterized in that: The main blade limiting plate (4) has a first circumferential surface (42), a first concave surface (43) and a first transition surface (44), and the first circumferential surface (42) and the first concave surface (43) are smoothly connected through the first transition surface (44); The ground knife limiting plate (5) has a second circumferential surface (52), a second concave surface (53) and a second transition surface (54), and the second circumferential surface (52) and the second concave surface (53) are smoothly connected through the second transition surface (54).

5. The mechanical interlocking device for the main grounding switch of a vertical disconnector according to claim 4, characterized in that: When the limiting rod (6) abuts against the second circumferential surface (52), the end of the limiting rod (6) away from the second circumferential surface (52) is inserted into the first groove (41). When the limiting rod (6) abuts against the first circumferential surface (42), the end of the limiting rod (6) away from the first circumferential surface (42) is inserted into the second groove (51).

6. A mechanical interlocking device for the main grounding switch of a vertical disconnector according to any one of claims 1-5, characterized in that: Two sets of the main blade limiting plate (4), the ground blade limiting plate (5), and the limiting rod (6) are arranged, and the two sets of the main blade limiting plate (4), the ground blade limiting plate (5), and the limiting rod (6) are symmetrically arranged at both ends of the frame (1).

7. A mechanical interlocking device for the main grounding switch of a vertical disconnector according to any one of claims 1-5, characterized in that: It also includes a mounting bracket (9), which is fixedly connected to the frame (1), and the limiting rod (6) is slidably connected to the mounting bracket (9).

8. The mechanical interlocking device for the main grounding switch of a vertical disconnector according to claim 7, characterized in that: The mounting bracket (9) is provided with a sliding sleeve (91), which is arranged along the line connecting the center of the main blade limiting plate (4) and the center of the ground blade limiting plate (5). The limiting rod (6) is slidably connected inside the sliding sleeve (91).

9. The mechanical interlocking device for the main grounding switch of a vertical disconnector according to claim 8, characterized in that: The sliding sleeve (91) is made of wear-resistant material.

10. A disconnecting switch, characterized in that: The mechanical interlocking device for the main grounding switch of the vertical disconnecting switch according to any one of claims 1-9 further includes a first insulator (11), a first contact (12), a second insulator (13), a second contact (14), a main disconnecting switch (7), an operating insulator (15), a rocker arm (16), and a grounding switch (8); The first insulator (11) and the second insulator (13) are fixedly connected to the frame (1) at intervals. The first contact (12) is fixedly connected to the top of the first insulator (11), the second contact (14) is fixedly connected to the top of the second insulator (13), and the rocker arm (16) is fixedly connected to the outer wall of the main blade operating shaft (2). The main knife switch (7) is connected to the rocker arm (16) at one end away from the main knife operating shaft (2) via the operating insulator (15). The first end of the operating insulator (15) is hinged to the rocker arm (16), and the second end of the operating insulator (15) is hinged to the middle of the main knife switch (7). The grounding switch (8) is fixedly connected to the outer wall of the grounding switch operating shaft (3).

Images