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

Abstract

The invention provides a vertical opening type disconnecting switch main grounding knife mechanical interlocking device and a disconnecting switch, the vertical opening type disconnecting switch main grounding knife mechanical interlocking device comprises a frame body, a main knife operation shaft and a grounding knife operation shaft, the main knife operation shaft and the grounding knife operation shaft are both rotatably connected to the frame body, the vertical opening type disconnecting switch main grounding knife mechanical interlocking device further comprises a main knife limiting disc, a grounding knife limiting disc and a limiting rod, the main knife limiting disc is coaxially and fixedly connected to the main knife operation shaft, and the limiting rod is coaxially and fixedly connected to the grounding knife operation shaft. The grounding switch limiting disc is coaxially and fixedly connected to the grounding switch operating shaft, a first groove is formed in the main switch limiting disc, a second groove is formed in the grounding switch 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 switch limiting disc and the center of the grounding switch 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] The invention relates to the technical field of high-voltage disconnectors, and in particular to a main earthing switch mechanical interlocking device for a vertically-opened disconnector and the disconnector. Background Art

[0002] In the power transmission and distribution system, the main knife switch and the ground knife switch of the outdoor high-voltage disconnector are often used in combination (in the AC voltage level, 1kV and below are usually called low voltage, above 1kV and 35kV and below are called medium voltage, and above 35kV and below 220kV are called high voltage). Due to the size, most vertical open disconnectors use a manual mechanism with a built-in lock to achieve locking. When the main knife switch and the ground knife switch are not suitable for such a mechanism, in order to prevent misoperation and ensure the safe operation of the power grid, a mechanical lock must be installed between the main knife switch and the ground knife switch to ensure that the ground knife switch cannot be closed when the main knife switch of the disconnector is closed, and when the ground knife switch is closed, the main knife switch of the disconnector cannot be closed (it should be noted that the main ground knife in the main ground knife mechanical interlocking device mentioned in the title refers to the main knife switch and the ground knife switch).

[0003] The mechanical interlocking device of the existing isolating switch is often connected in a multi-link manner. Taking the public text CN117976457A as an example, it includes a main rotating plate, an interlocking link, a support shaft, a locking plate and a grounding rotating plate; the main rotating plate is arranged on the rotating shaft of the main knife switch; the support shaft is arranged on the base frame and is located between the rotating shaft of the main knife switch and the rotating shaft of the grounding knife switch; the locking plate is rotatably connected to the support shaft; the grounding rotating plate is arranged on the rotating shaft of the grounding knife switch; the interlocking link is connected to the main rotating plate and the locking plate; when the main knife switch is connected to the first wiring position, the locking plate is located on the rotating track of the grounding rotating plate to prevent the grounding knife switch from rotating in the direction close to the second wiring position; when the grounding knife switch is connected to the second wiring position, the grounding rotating plate is located on the rotating track of the locking plate to prevent the main knife switch from rotating in the direction close to the second wiring position. The interlocking link is hinged to the main rotating plate by a rotating pin, and the interlocking link is also hinged to the locking plate by a rotating pin (from the attached document in the comparative document) Figure 4 and attached Figure 6 As can be seen in the figure, this locking device has many spare parts and a high production cost. Secondly, because there are many parts and the structure is complex, it is easy to get stuck or the rotating pin falls off, resulting in a malfunction that cannot operate normally.

[0004] In summary, there is an urgent need for a mechanical interlocking device for the main earth switch of a vertical opening isolating switch and an isolating switch to solve or at least partially solve the problems existing in the prior art. Summary of the invention

[0005] The purpose of the present invention is to provide a mechanical interlocking device for the main earthing switch of a vertical opening isolating switch and an isolating switch, aiming to solve the problem of complex structure and high failure rate of the prior art. The specific technical solution is as follows:

[0006] A mechanical interlocking device for the main earth knife of a vertical open isolating switch comprises a frame, a main knife operating shaft and a ground knife operating shaft, wherein the main knife operating shaft and the ground knife operating shaft are both rotatably connected to the frame, and further comprises a main knife limit plate, a ground knife limit plate and a limit rod, wherein the main knife limit plate is coaxially fixedly connected to the main knife operating shaft, and the ground knife limit plate is coaxially fixedly connected to the ground knife operating shaft, the main knife limit plate is provided with a first groove, and the ground knife limit plate is provided with a second groove, and the limit rod is slidably arranged along the direction of the line connecting the center of the main knife limit plate and the center of the ground knife limit plate; when the main knife limit plate rotates, the end of the limit rod away from the main knife limit plate is in the second groove, and the end of the limit rod close to the main knife limit plate is outside the first groove; when the ground knife limit plate rotates, the end of the limit rod away from the ground knife limit plate is in the first groove, and the end of the limit rod close to the ground knife limit plate is outside the second groove.

[0007] Preferably, the main knife limit plate, the limit rod and the ground knife limit plate satisfy the following relationship:

[0008]

[0009]

[0010]

[0011] Among them, D1 is the diameter of the main cutter limit plate; D2 is the diameter of the ground cutter limit 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 cutter limit plate and the center of the ground cutter limit plate; L2 is the total length of the limit rod.

[0012] Preferably, the main knife operating shaft is used to control the external main knife switch, and the ground knife operating shaft is used to control the external ground knife switch. When the first groove is opposite to the limit rod, the external main knife switch works in the open position, and when the second groove is opposite to the limit rod, the external ground knife switch works in the open position.

[0013] Preferably, the main tool limiting disc 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 transitionally connected via the first transition surface;

[0014] The ground cutter limiting disk is provided with a second circumferential surface, a second concave surface and a second transition surface, and the second circumferential surface and the second concave surface are smoothly transitionally connected via the second transition surface.

[0015] 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.

[0016] Preferably, the main knife limit plate, the ground knife limit plate and the limit rod are arranged in two groups, and the two groups of main knife limit plates, the ground knife limit plates and the limit rod are symmetrically arranged at both ends of the frame.

[0017] Preferably, it also includes a mounting frame, which is fixedly connected to the frame body, and the limiting rod is slidably connected to the mounting frame.

[0018] Preferably, a sliding sleeve is provided on the mounting frame, and the sliding sleeve is arranged along the line connecting the center of the main knife limiting disc and the center of the ground knife limiting disc, and the limiting rod is slidably connected in the sliding sleeve.

[0019] Preferably, the sliding sleeve is made of wear-resistant material.

[0020] On the other hand, the present application also provides an isolating switch, the specific scheme is as follows:

[0021] A disconnector, comprising the above-mentioned mechanical interlocking device for the main earth switch of a vertical open disconnector, and also comprising a first insulator, a first contact, a second insulator, a second contact, a main knife switch, an operating insulator, a rocker arm and an earth switch; the first insulator and the second insulator are fixedly connected to a frame at intervals, the first contact is fixedly connected to the top of the first insulator, the second contact is fixedly connected to the top of the second insulator, and the rocker arm is fixedly connected to the outer side wall of the main knife operating shaft; the main knife switch is connected to an end of the rocker arm away from the main knife operating shaft through 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 part of the main knife switch; the earth switch is fixedly connected to the outer side wall of the earth knife operating shaft.

[0022] The application of the technical solution of the present invention has the following beneficial effects:

[0023] When it is necessary to close the external main knife switch, the ground knife operating shaft is rotated to make the second groove of the ground knife limit disk correspond to the limit rod. At this time, the external ground knife switch is in the open state. The main knife operating shaft is rotated to close the external main knife switch. At this time, the main knife limit disk drives one end of the limit rod to move into the second groove, and limits the ground knife limit disk, thereby preventing the ground knife operating shaft from being misoperated when the external main knife switch is closed; when it is necessary to close the ground knife, the main knife operating shaft is rotated to make the first groove of the main knife limit disk correspond to the limit rod. At this time, the external main knife switch is in the open state. The ground knife operating shaft is rotated to close the external ground knife switch. At this time, the ground knife limit disk drives one end of the limit rod to move into the first groove, and limits the main knife limit disk, thereby preventing the main knife operating shaft from being misoperated when the external ground knife switch is closed, thereby realizing the function of mechanical interlocking of the main knife operating shaft and the ground knife operating shaft.

[0024] In addition, the overall structure of the present application has fewer parts and is tightly connected, which makes it less likely to get stuck or be unable to lock. While meeting the requirements of mechanical locking, it reduces the failure rate, improves the stability of equipment operation, and on the other hand reduces the production cost of the equipment.

[0025] In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. Figure 1-Figure 7 , the present invention is further described in detail. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0027] Figure 1 This is one of the overall structural schematic diagrams of a mechanical interlocking device for a main earthing switch of a vertical opening isolating switch of the present application;

[0028] Figure 2 This is the second overall structural schematic diagram of a mechanical interlocking device for a main earthing switch of a vertical opening isolating switch of the present application;

[0029] Figure 3 This is the third overall structural schematic diagram of a mechanical interlocking device for a main earthing switch of a vertical opening isolating switch of the present application;

[0030] Figure 4 It is an enlarged view of a main knife limit plate in a main earth knife mechanical interlocking device of a vertical opening isolating switch of the present application;

[0031] Figure 5 It is an enlarged view of a ground knife limit plate in a mechanical interlocking device of a main ground knife of a vertical opening disconnect switch of the present application;

[0032] Figure 6 This is a schematic diagram of the overall structure of an isolating switch in the present application in an open state;

[0033] Figure 7 It is a schematic diagram of the overall structure of an isolating switch in the present application in a closed state.

[0034] Among them, 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 DESCRIPTION

[0035] In order to facilitate the understanding of the present invention, the present invention will be described more fully below, and preferred embodiments of the present invention are provided. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0036] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0037] Example:

[0038] See also Figure 1-Figure 7 The present embodiment provides a mechanical interlocking device for the main grounding knife of a vertical opening disconnector, comprising a frame 1, a main knife operating shaft 2 and a grounding knife operating shaft 3, wherein the main knife operating shaft 2 and the grounding knife operating shaft 3 are both rotatably connected to the frame 1, and further comprising a main knife limiting plate 4, a grounding knife limiting plate 5 and a limiting rod 6, wherein the main knife limiting plate 4 is coaxially fixedly connected to the main knife operating shaft 2, the grounding knife limiting plate 5 is coaxially fixedly connected to the grounding knife operating shaft 3, the main knife limiting plate 4 is provided with a first groove 41, and the grounding knife limiting plate 5 is provided with a first groove 42. Two grooves 51, the limit rod 6 is slidably arranged along the direction of the line connecting the center of the main knife limit disk 4 and the center of the ground knife limit disk 5; when the main knife limit disk 4 rotates, the end of the limit rod 6 away from the main knife limit disk 4 is in the second groove 51, and the end of the limit rod 6 close to the main knife limit disk 4 is outside the first groove 41; when the ground knife limit disk 5 rotates, the end of the limit rod 6 away from the ground knife limit disk 5 is in the first groove 41, and the end of the limit rod 6 close to the ground knife limit disk 5 is outside the second groove 51.

[0039] Specifically, the main knife operating shaft 2 is rotatably connected to the frame body 1 through a bearing, and the ground knife operating shaft 3 is also rotatably connected to the frame body 1 through a bearing, and the main knife operating shaft 2 and the ground knife operating shaft 3 are arranged parallel to each other. When the main knife limit plate 4 rotates, the limit rod 6 slides and inserts into the second groove 51 to put the ground knife disc in a limited state, and when the ground knife limit plate 5 rotates, the limit rod 6 slides and inserts into the first groove 41 to put the main knife disc in a limited state.

[0040] It can be understood that when the external main knife switch 7 needs to be closed, the ground knife operating shaft 3 is rotated to make the second groove 51 of the ground knife limit plate 5 correspond to the limit rod 6. At this time, the external ground knife switch 8 is in the open state, and the main knife operating shaft 2 is rotated to close the external main knife switch 7. At this time, the main knife limit plate 4 drives one end of the limit rod 6 to move into the second groove 51 and limits the ground knife limit plate 5, thereby preventing the ground knife operating shaft 3 from being closed when the external main knife switch 7 is closed. When the ground knife needs to be closed, the main knife operating shaft 2 is rotated to make the first groove 41 of the main knife limit plate 4 correspond to the limit rod 6. At this time, the external main knife switch 7 is in the open state, and the ground knife operating shaft 3 is rotated to close the external ground knife switch 8. At this time, the ground knife limit plate 5 drives one end of the limit rod 6 to move to the first groove 41 and limits the main knife limit plate 4, thereby preventing the main knife operating shaft 2 from being misoperated when the external ground knife switch 8 is closed. The overall structure of the present application has few parts and is tightly connected. It is not easy to get stuck or unable to lock. While meeting the mechanical locking requirements, it reduces the failure rate, improves the stability of the equipment operation, and on the other hand, reduces the production cost of the equipment.

[0041] In some embodiments, the main knife limit disk 4 is fixedly connected to the main knife operating shaft 2 by welding, and the ground knife limit disk 5 is also fixedly connected to the ground knife operating shaft 3 by welding. In other embodiments, a through hole is provided in the middle of the main knife limit disk 4, and the main knife limit disk 4 is sleeved on the main knife operating shaft 2 through the through hole. The end surface of the main knife limit disk 4 protrudes outward with a flange, and a first tightening screw is radially arranged on the flange. The first tightening screw is threadedly connected to the flange, and the end of the first tightening screw is tightened against the outer surface of the main knife operating shaft 2, so as to realize the main knife limit disk 4 being fixedly connected to the main knife operating shaft 2. When the relative position of the main knife limit disk 4 and the main knife operating shaft 2 needs to be adjusted, the relative position of the main knife limit disk 4 on the main knife operating shaft 2 can be adjusted by simply loosening the first tightening screw. Similarly, a through hole is also provided on the ground knife limit plate 5, and a flange is protruded outward at the end of the ground knife limit plate 5, and a second tightening screw is radially provided on the flange, and the ground knife limit plate 5 is fixedly connected to the ground knife operating shaft 3 by the second tightening screw.

[0042] As a preferred embodiment, the main knife limit plate 4, the limit rod 6 and the ground knife limit plate 5 satisfy the following relationship:

[0043]

[0044]

[0045]

[0046] Among them, D1 is the diameter of the main cutter limit plate 4; D2 is the diameter of the ground cutter limit 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 cutter limit plate 4 and the center of the ground cutter limit plate 5; L2 is the total length of the limit rod 6.

[0047] It can be understood that, assuming that the diameter of the main knife limit plate 4 D1, the diameter of the ground knife limit plate 5 D2, the depth of the first groove 41 H1, the depth of the second groove 51 H2 and the distance between the center of the main knife limit plate 4 and the center of the ground knife limit plate 5 L1 remain unchanged, the length of the limit rod 6 is limited by the above relationship so that the limit rod 6 is within a suitable length range. If the limit rod 6 is not long enough, that is, the limit rod 6 cannot play a limiting role on the main knife limit plate 4 and the ground knife limit plate 5, and thus loses the limiting function; if the length of the limit rod 6 is too long, the mechanical interlocking device cannot be installed, that is, the limit rod 6 cannot be installed between the main knife limit plate 4 and the ground knife limit plate 5.

[0048] As a preferred embodiment, the main knife operating shaft 2 is used to control the external main knife switch 7, and the ground knife operating shaft 3 is used to control the external ground knife switch 8. When the first groove 41 is opposite to the limit rod 6, the external main knife switch 7 works in the open position, and when the second groove 51 is opposite to the limit rod 6, the external ground knife switch 8 works in the open position.

[0049] It can be understood that, through such an arrangement, when the first groove 41 is opposite to the limiting rod 6, the external main knife switch 7 is in the open state, at this time, the ground knife operating shaft 3 can be rotated, and the ground knife limiting disk 5 can be driven to rotate, and the ground knife limiting disk 5 pushes the limiting rod 6 away from the ground knife limiting disk 5 to enter the first groove 41 of the main knife limiting disk 4 during the rotation process, and the main knife limiting disk 4 and the main knife operating shaft 2 are limited. When the ground knife operating shaft 3 is rotated, the external ground knife can be conveniently opened or closed. Similarly, when the second groove 51 is opposite to the limiting rod 6, the external ground knife switch 8 is in the open state, and the main knife operating shaft 2 can be rotated to conveniently open or close the external main knife.

[0050] As a preferred embodiment, the main tool limit 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 transitioned to each other through the first transition surface 44; the ground tool limit 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 transitioned to each other through the second transition surface 54.

[0051] It can be understood that the first circumferential surface 42 and the first concave surface 43 are smoothly transitioned through the first transition surface 44, and the first concave surface 43 is an arc-shaped concave surface. During the rotation process, the arc-shaped concave surface and the transition surface have a guiding effect on the limit rod 6. When the main tool limit disk 4 rotates, the limit rod 6 is guided, so that the limit rod 6 can be smoothly pushed toward the ground tool limit disk 5. The first transition surface 44 is an arc-shaped transition surface; the second circumferential surface 52 and the second concave surface 53 are smoothly transitioned through the second transition surface 54, and the second concave surface 53 is an arc-shaped concave surface. During the rotation process, the arc-shaped concave surface and the transition surface have a guiding effect on the limit rod 6. When the ground tool limit disk 5 rotates, the limit rod 6 is guided, so that the limit rod 6 can be smoothly pushed toward the main tool limit 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 play a guiding role, and the first transition surface 44 and the second transition surface 54 may also be other arc-shaped surfaces that can play a smooth transition role.

[0052] As 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; 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.

[0053] It can be understood that when the limiting rod 6 abuts against the second circumferential surface 52, the ground knife limiting disc 5 and the ground knife operating shaft 3 can rotate smoothly, and at this time the limiting rod 6 is in a state of being inserted into the first groove 41, and at this time the main knife limiting disc 4 and the main knife operating shaft 2 are in a limited state, and at this time the main knife switch 7 corresponding to the main knife operating rod is in an open state, so that when the ground knife operating shaft 3 is operated, the main knife operating shaft 2 and the main knife limiting disc 4 are limited. When the limiting rod 6 abuts against the first circumferential surface 42, the main knife limiting disc 4 and the main knife operating shaft 2 can rotate smoothly, and at this time the limiting rod 6 is in a state of being inserted into the second groove 51, and at this time the ground knife limiting disc 5 and the ground knife operating shaft 3 are in a limited state, and at this time the ground knife switch 8 corresponding to the ground knife operating rod is in an open state, so that when the main knife operating shaft 2 is operated, the ground knife operating shaft 3 and the ground knife limiting disc 5 are limited.

[0054] As a preferred embodiment, the main knife limit plate 4, the ground knife limit plate 5 and the limit rod 6 are arranged in two groups, and the two groups of main knife limit plates 4, the ground knife limit plates 5 and the limit rod 6 are symmetrically arranged at both ends of the frame 1.

[0055] It can be understood that by arranging two groups symmetrically, when the main knife operating shaft 2 rotates together with the main knife limiting disk 4 fixedly connected to the two ends of the main knife operating shaft 2, and pushes the two limiting rods 6 to move toward the two ground knife limiting disks 5 at the two ends of the ground knife operating shaft 3, the two limiting rods 6 are respectively inserted into the two second grooves 51 of the two ground knife limiting disks 5, and the ground knife operating rod and the two ground knife limiting disks 5 are limited, and then the external ground knife installed on the ground knife limiting disk 5 is limited, so as to prevent the ground knife switch 8 from closing due to the erroneous operation of the ground knife when the external main knife switch 7 is closed, causing a safety accident. It can be known that the ground knife limiting disks 5 at both ends of the ground knife operating shaft 3 or the main knife limiting disks 4 at both ends of the main knife operating shaft 2 are limited at the same time, so that the limiting force of the ground knife operating shaft 3 and the main knife operating shaft 2 is more uniform, and the limiting stability of the main knife limiting shaft and the ground knife limiting shaft is improved.

[0056] As a preferred embodiment, the mechanical interlocking device further comprises a mounting frame 9 , the mounting frame 9 is fixedly connected to the frame body 1 , and the limiting rod 6 is slidably connected to the mounting frame 9 .

[0057] It can be understood that the mounting frame 9 is fixedly connected to one side of the frame body 1 by welding or bolting, and the limiting rod 6 is supported by the mounting frame 9 so that the limiting rod 6 can slide back and forth smoothly. In the actual production process, two mounting frames 9 are arranged along the length direction of the limiting rod 6 to enhance the support and guiding effect on the limiting rod 6.

[0058] As a preferred embodiment, a sliding sleeve 91 is installed on the mounting frame 9 , and the sliding sleeve 91 is arranged along the line connecting the center of the main knife limiting disk 4 and the center of the ground knife limiting disk 5 , and the limiting rod 6 is slidably connected in the sliding sleeve 91 .

[0059] It can be understood that the setting of the sleeve 91 plays a guiding role on the limit rod 6, so that the limit rod 6 slides along the direction of the line connecting the center of the main knife limit disk 4 and the center of the ground knife limit disk 5, thereby improving the stability of the movement of the limit rod 6. In this embodiment, the sleeve 91 is a circular sleeve 91, and the limit rod 6 is a cylindrical limit rod 6, and the limit rod 6 is arranged to slide through the sleeve 91. Arranging the sleeve 91 in a circular shape is conducive to the production and processing of the sleeve 91. Secondly, the prototype sleeve 91 can be replaced by an oil-free sleeve. The oil-free sleeve is a standard part and can be purchased directly without production and processing. Moreover, the production of standard parts is often mass-produced, with low manufacturing costs, and when the sleeve is damaged, it can be directly purchased and replaced, which is conducive to reducing the later maintenance cost of the equipment and saving maintenance time, and is conducive to improving the market competitiveness of the product.

[0060] As a preferred embodiment, both ends of the limiting rod 6 are in the shape of arc surfaces, and specifically, both ends of the limiting rod 6 are spherical surfaces.

[0061] It can be understood that the spherical surface guides the limit rod 6, so that during the rotation of the main tool limit disk 4 and the ground tool limit disk 5, the first concave surface 43 on the first groove 41 or the second concave surface 53 on the second groove 51 pushes the spherical surface on the limit rod 6 to move, and under the guiding action of the spherical surface, the limit rod 6 can slide back and forth more easily.

[0062] As a preferred embodiment, the sliding sleeve 91 is made of wear-resistant material.

[0063] It can be known that the sleeve 91 is made of wear-resistant material to increase the wear resistance of the sleeve 91 and improve the service life of the sleeve 91. In addition, the sleeve 91 is made of a material with a small friction coefficient. When the limit rod 6 slides back and forth in the sleeve 91, the sliding resistance of the limit rod 6 is reduced, so that the limit rod 6 can slide back and forth in the sleeve 91 more smoothly. Specifically, the sleeve 91 can be made of one of tin bronze, aluminum bronze, and polytetrafluoroethylene. Of course, in some other embodiments, the sleeve 91 can also be made of other wear-resistant materials with a low friction coefficient.

[0064] See also Figure 1-Figure 7 , the present application also provides an isolating switch, the specific scheme is as follows:

[0065] A disconnector, comprising the above-mentioned mechanical interlocking device for the main earth switch of a vertical open disconnector, also includes a first insulator 11, a first contact 12, a second insulator 13, a second contact 14, a main switch 7, an operating insulator 15, a rocker arm 16 and an earth 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 side wall of the main switch operating shaft 2; the main switch 7 is connected to one end of the rocker arm 16 away from the main switch operating shaft 2 through 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 switch 7; the earth switch 8 is fixedly connected to the outer side wall of the earth switch operating shaft 3.

[0066] It can be known that, taking the initial state in which the main knife switch 7 is closed and the ground knife switch 8 is 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 an unlocked state and can rotate. When the high-voltage line needs to be inspected and repaired, the isolating switch needs to be disconnected. The operator operates the main knife operating shaft 2 to rotate, and the main knife operating shaft 2 drives the rocker arm 16 to rotate together, thereby driving the operating insulator 15 and the main knife switch 7 to operate, so that the main knife switch 7 is opened, and the circuit is broken between the first contact 12 and the second contact 14. After the main knife switch 7 is opened, the first groove 41 on the main knife limit disk 4 is opposite to the limit rod 6, and the ground knife operating shaft 3 is driven to rotate, and the ground knife operating shaft 3 drives the ground knife switch 8 to rotate, and the second contact 14 has a ground knife contact until the ground knife switch 8 rotates to connect with the ground knife contact; during the rotation of the ground knife operating shaft 3, the ground knife limit disk 5 is driven to rotate, and the ground knife limit disk 5 pushes the limit rod 6 to move to the first groove 41, limits the main knife limit disk 4, prevents the main knife operating shaft 2 from being operated incorrectly, and completes the opening operation of the isolating switch. Similarly, when it is necessary to close the disconnector, the earth knife operating shaft 3 is rotated to open the earth knife switch 8, so that the second groove 51 on the earth knife limit plate 5 corresponds to the limit rod 6. At this time, the main knife limit plate 4 is unlocked, and the main knife operating shaft 2 is rotated to rotate, and the main knife limit plate 4 is driven to rotate. At this time, the main knife limit plate 4 pushes the limit rod 6 to insert into the second groove 51, and the earth knife limit plate 5 is limited, thereby preventing the earth knife operating shaft 3 from being operated incorrectly; in addition, when the main knife operating shaft 2 rotates, it drives the rocker arm 16 to move, and drives the operating insulator 15 and the main knife switch 7 to move through the rocker arm 16, so that the two ends of the main knife switch 7 are respectively engaged with the first contact 12 and the second contact 14, thereby realizing the closing operation of the main knife switch 7.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mechanical interlocking device for a main earthing knife of a vertical opening isolating switch, comprising a frame (1), a main knife operating shaft (2) and an earthing knife operating shaft (3), wherein the main knife operating shaft (2) and the earthing knife operating shaft (3) are both rotatably connected to the frame (1), characterized in that: It also comprises a main knife limiting disk (4), a ground knife limiting disk (5) and a limiting rod (6), wherein the main knife limiting disk (4) is coaxially fixedly connected to the main knife operating shaft (2), the ground knife limiting disk (5) is coaxially fixedly connected to the ground knife operating shaft (3), the main knife limiting disk (4) is provided with a first groove (41), the ground knife limiting disk (5) is provided with a second groove (51), and the limiting rod (6) is slidably arranged along the direction of the line connecting the center of the main knife limiting disk (4) and the center of the ground knife limiting disk (5); When the main knife limiting disk (4) rotates, the end of the limiting rod (6) away from the main knife limiting disk (4) is located in the second groove (51), and the end of the limiting rod (6) close to the main knife limiting disk (4) is located outside the first groove (41); When the ground cutter limiting disk (5) rotates, the end of the limiting rod (6) away from the ground cutter limiting disk (5) is located in the first groove (41), and the end of the limiting rod (6) close to the ground cutter limiting disk (5) is located outside the second groove (51).

2. A mechanical interlocking device for the main earth switch of a vertical opening disconnector according to claim 1, characterized in that: The main knife limit plate (4), the limit rod (6) and the ground knife limit plate (5) satisfy the following relationship: Wherein, D1 is the diameter of the main tool limit plate (4); D2 is the diameter of the ground knife limit 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 cutter limit plate (4) and the center of the ground cutter limit plate (5); L2 is the total length of the limiting rod (6).

3. A mechanical interlocking device for the main earth switch of a vertical opening disconnector according to claim 2, characterized in that: The main knife operating shaft (2) is used to control an external main knife switch (7), and the ground knife operating shaft (3) is used to control an external ground knife switch (8); when the first groove (41) is opposite to the limit rod (6), the external main knife switch (7) works in an open position, and when the second groove (51) is opposite to the limit rod (6), the external ground knife switch (8) works in an open position.

4. A mechanical interlocking device for a main earth switch of a vertical opening disconnector according to claim 2, characterized in that: The main tool limiting disc (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 transitionally connected via the first transition surface (44); The ground cutter limiting disc (5) has a second circumferential surface (52), a second concave surface (53) and a second transition surface (54); the second circumferential surface (52) and the second concave surface (53) are smoothly transitionally connected via the second transition surface (54).

5. A mechanical interlocking device for the main earth switch of a vertical opening 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 a main earth switch of a vertical opening disconnector according to any one of claims 1 to 5, characterized in that: The main knife limiting disc (4), the ground knife limiting disc (5) and the limiting rod (6) are each arranged in two groups, and the two groups of the main knife limiting disc (4), the ground knife limiting disc (5) and the limiting rod (6) are symmetrically arranged at both ends of the frame (1).

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

8. The mechanical interlocking device for the main earth switch of a vertical opening disconnector according to claim 7 is characterized in that: The mounting frame (9) is provided with a sliding sleeve (91), the sliding sleeve (91) being arranged along the line connecting the center of the main knife limiting disk (4) and the center of the ground knife limiting disk (5), and the limiting rod (6) being slidably connected in the sliding sleeve (91).

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

10. An isolating switch, characterized in that: A mechanical interlocking device for a main earthing switch of a vertical opening disconnector according to any one of claims 1 to 9, further comprising a first insulator (11), a first contact (12), a second insulator (13), a second contact (14), a main switch (7), an operating insulator (15), a rocker arm (16) and an earthing 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 side wall of the main knife operating shaft (2); The main knife switch (7) is connected to an end of the rocker arm (16) away from the main knife operating shaft (2) through 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 part of the main knife switch (7); The ground knife switch (8) is fixedly connected to the outer side wall of the ground knife operating shaft (3).

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