Isolating switch

Abstract

The invention belongs to the technical field of electric power, and discloses an isolating switch which comprises a base, a second insulating column fixedly mounted at the top of the base, a static contact pad fixedly mounted at the top of the second insulating column, and a disconnecting link assembly hinged to the static contact pad, and the butt joint assembly is fixedly arranged at the top of the base. According to the invention, the disconnecting link main body is driven by an electric motor or a hand wheel to rotate by taking the hinged part of the disconnecting link main body and the static contact pad as a center shaft, so that the butt joint piece falls into the top of the moving contact pad, the butt joint piece pushes the two sliding frames, the conductive piece and the butt joint toothed plate to move relatively, and the butt joint toothed plate is engaged with racks on two sides of the butt joint piece; the contact area of the butt-joint piece and the butt-joint toothed plate is increased through meshing of the multiple racks, the phenomenon of deformation caused by thermal expansion and cold contraction is avoided, meanwhile, the butt-joint piece and the butt-joint toothed plate are in surface contact all the time, the effective conductive section is guaranteed, local overheating and arc discharge are avoided, and the reliability of circuit on-off is guaranteed.

Description

Technical Field

[0001] The invention belongs to the technical field of electric power, in particular to an isolating switch. Background Art

[0002] Isolators are high-voltage switchgear used in power systems to safely isolate electrical equipment or circuits. Their core function is to disconnect the circuit under no-load or very low-current conditions, creating a visible disconnect point and ensuring the safety of maintenance personnel and equipment. Isolators typically consist of a conductive component (blades, contacts), an insulating component (porcelain bottle, insulators, etc.), a transmission mechanism (handwheel or electric operating mechanism), and a base.

[0003] Isolating switches use electric or handwheel-operated blades to switch circuits on and off. Their contact structures are exposed to the outdoor environment for long periods of time, and most contacts utilize copper sheet contact designs. Under the continuous influence of diurnal temperature differences and changes in load current, the copper material repeatedly undergoes thermal expansion and contraction. The periodic thermal stress accumulated during operation causes the copper sheet to undergo plastic deformation, and the amount of deformation increases with years of operation. Contact deformation disrupts the uniformity of pressure distribution on the contact surface, causing the actual contact mode to degenerate from surface contact to point contact, significantly reducing the effective conductive cross-sectional area. This contact degradation dramatically increases contact resistance, leading to local overheating and arc discharge, ultimately compromising the on-off reliability of the circuit. Therefore, an isolating switch is proposed. Summary of the Invention

[0004] In order to solve the problems raised in the above-mentioned background technology, the present invention provides an isolating switch, which solves the problem that the deformation of the contacts of the existing isolating switch will destroy the uniformity of the pressure distribution on the contact surface, causing the actual contact mode to degenerate from surface contact to point contact, causing local overheating and arc discharge, and damaging the circuit on-off reliability.

[0005] To achieve the above object, the present invention provides the following technical solution: an isolating switch, comprising a base, a second insulating column fixedly mounted on the top of the base, a static contact pad fixedly mounted on the top of the second insulating column, and further comprising: A knife switch assembly, the knife switch assembly being hinged to the static contact pad; A docking assembly, the docking assembly being fixedly mounted on the top of the base; The knife switch assembly comprises a knife switch body hinged on the static contact pad, a docking piece is hinged at the end of the knife switch body, and a stabilizing transverse groove is provided on the knife switch body; The docking assembly includes a first insulating column fixedly mounted on the top of the base, and a moving contact pad is fixedly mounted on the top of the first insulating column; A sliding frame is symmetrically arranged on the moving contact pad, a conductive member is arranged on the outside of the sliding frame, and an end of the conductive member is connected to a docking tooth plate through a first reset elastic member; Racks are equidistantly provided on both sides of the docking piece. When the docking piece is located on the moving contact pad, two docking tooth plates are engaged with the racks on both sides of the docking piece.

[0006] The knife switch body is driven by an electric motor or a hand wheel to rotate around the hinged joint with the static contact pad, so that the docking piece falls on the top of the moving contact pad. The docking piece pushes the two sliding frames, the conductive piece and the docking tooth plate to move relative to each other, so that the docking tooth plate engages with the racks on both sides of the docking piece. The contact area between the docking piece and the docking tooth plate is increased by the engagement of multiple racks to avoid deformation due to thermal expansion and contraction. At the same time, the docking piece and the docking tooth plate are always in surface contact to ensure an effective conductive cross-section, avoid local overheating and arc discharge, and ensure the reliability of circuit switching.

[0007] Preferably, a guide connecting column is movably sleeved on the top of the moving contact pad, an insulating plate is fixedly mounted on the top of the guide connecting column, and a second reset elastic member for supporting the insulating plate upward is provided on the moving contact pad.

[0008] Preferably, both ends of the top of the moving contact pad are fixed with protruding support plates, and the protruding support plates are provided with guide grooves; A connecting frame is installed at the bottom of the guide connecting column. The sliding frame slides in the guide groove. The sliding frame is hinged to the connecting frame at the bottom of the guide connecting column through a connecting piece.

[0009] Preferably, the racks on both sides of the docking member and the racks on the docking tooth plate are both in a vertical state, and the racks on the docking tooth plate and the racks on the side of the docking member are staggered.

[0010] Preferably, the top and bottom of the knife switch body close to the docking piece are fixedly installed with limit baffles, and the interior of the upper limit baffle is fixedly installed with an elastic sheet, and the end of the elastic sheet contacts the docking piece; The knife switch body and the docking piece rotate with the hinged joint of the static contact pad as the central axis. Under the action of the elastic sheet, the docking piece is in a vertical state and contacts the top of the insulating plate.

[0011] Preferably, the protective assembly includes a protective kit that is movably mounted on the outside of the knife switch body through a sliding member, a slot is provided in the middle of the protective kit, a connecting rod is hinged at the bottom of the protective kit, and the bottom end of the connecting rod is connected to the base through a connecting plate.

[0012] Preferably, a notch is provided in the middle of the protective kit, and an arc piece is provided at one end of the inner wall of the notch; The length of the notch is greater than the length of the docking piece; During the initial rotation of the knife switch body toward the docking assembly, the docking member is located at the notch and contacts the insulating plate.

[0013] Preferably, during the process of disconnection between the docking piece and the insulating plate, the protective assembly moves along the stabilizing transverse groove toward the second insulating column end under the action of the connecting rod, so that the docking piece is located inside the protective assembly.

[0014] Preferably, a protective cover is fixed on the top of the protruding support plate, the sliding frame, the conductive member and the docking tooth plate are slidably located in the protective cover, and L-shaped blocking plates are fixed on both sides of the protective kit.

[0015] Preferably, a transmission rod is provided on the base, the transmission rod is hinged to the knife switch body through a third insulating column, and the transmission rod is driven by a hand wheel or a motor.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention drives the knife switch body to rotate around the hinged joint with the static contact pad by an electric motor or a hand wheel, so that the docking piece falls on the top of the moving contact pad. The docking piece pushes the two sliding frames, the conductive piece and the docking tooth plate to move relative to each other, so that the docking tooth plate engages with the racks on both sides of the docking piece. The engagement of multiple racks increases the contact area between the docking piece and the docking tooth plate, avoiding deformation caused by thermal expansion and contraction. At the same time, the docking piece and the docking tooth plate are always in surface contact, ensuring an effective conductive cross section, avoiding local overheating and arc discharge, and ensuring the reliability of circuit switching. When the knife switch body of the present invention moves in the reverse direction, the protective kit moves in the reverse direction along the stable transverse groove through the sliding member under the action of the connecting rod. Since an arc piece is provided at one end of the inner wall of the groove, the arc piece guides the docking member to retract into the interior of the protective kit and compresses the elastic sheet to ensure that the docking member can normally enter the interior of the protective kit. During this process, the protective kit is sheathed on the outside of the docking member, preventing the docking member from being exposed to the outside and eroded by rainwater, thereby increasing the service life of the docking member and ensuring the circuit connection and disconnection effect. The present invention drives the knife switch body and the docking piece to rotate and dock with the docking assembly through the third insulating column. During the rotation process, the protective kit gradually slides, so that the docking piece is located at the slot, and the insulating plate is pressed down to make the docking tooth plate and the docking piece contact and connect. The L-shaped sealing plate will contact with the protective cover, and the connection between the protective kit and the protective cover is blocked, thereby realizing protection of the contact point and ensuring the stability of the circuit conduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall appearance of the present invention; Figure 2 This is a schematic diagram of the matching structure of the docking assembly and the knife switch assembly of the present invention; Figure 3 This is a schematic diagram of the coordination structure of the docking assembly, the knife switch assembly and the protection assembly of the present invention; Figure 4This is a schematic diagram of the disassembled structure of the knife switch assembly and the docking assembly of the present invention; Figure 5 This is a schematic diagram of the disassembled structure of the docking assembly of the present invention; Figure 6 This is a schematic diagram of the appearance structure of the butt-jointed tooth plate and the first resetting elastic member of the present invention; Figure 7 This is a schematic diagram of the motion structure of the knife switch assembly and the protection assembly of the present invention; Figure 8 This is a schematic diagram of the coordination structure of the knife switch assembly and the protection assembly of the present invention; Figure 9 This is a schematic diagram of the disassembled structure of the knife switch assembly and the protective assembly of the present invention; Figure 10 This is a schematic diagram of the appearance and structure of the knife switch assembly of the present invention.

[0018] In the figure: 1. base; 2. docking assembly; 21. first insulating column; 22. moving contact pad; 23. protruding support plate; 24. guide guide groove; 25. sliding frame; 26. conductive member; 27. first reset elastic member; 28. docking tooth plate; 211. insulating plate; 212. second reset elastic member; 213. guide connecting column; 214. connecting member; 3. second insulating column; 4. static contact pad; 5. knife switch assembly; 51. knife switch body; 52. stabilizing transverse groove; 53. limit baffle; 54. docking member; 55. third insulating column; 56. transmission rod; 57. elastic sheet; 6. protective assembly; 61. protective kit; 62. protective cover; 63. L-shaped blocking plate; 64. notch; 65. sliding member; 66. connecting rod; 67. connecting plate. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example

[0020] like Figures 1 to 10 As shown, the present invention provides an isolating switch, comprising a base 1, a second insulating column 3 is fixedly mounted on the top of the base 1, a static contact pad 4 is fixedly mounted on the top of the second insulating column 3, and further comprising: The knife switch assembly 5 is hinged on the static contact pad 4; The docking assembly 2 is fixed on the top of the base 1; The knife switch assembly 5 includes a knife switch body 51 hinged on the static contact pad 4, a docking piece 54 is hinged at the end of the knife switch body 51, and a stabilizing transverse groove 52 is provided on the knife switch body 51; The docking assembly 2 includes a first insulating column 21 fixedly mounted on the top of the base 1, and a moving contact pad 22 fixedly mounted on the top of the first insulating column 21; A sliding frame 25 is symmetrically provided on the moving contact pad 22, and a conductive member 26 is provided on the outside of the sliding frame 25. The end of the conductive member 26 is connected to a docking tooth plate 28 through a first reset elastic member 27; Racks are equidistantly provided on both sides of the docking member 54 . When the docking member 54 is located on the moving contact pad 22 , the two docking tooth plates 28 engage with the racks on both sides of the docking member 54 .

[0021] The above scheme is adopted: the knife switch body 51 is driven by an electric motor or a hand wheel to rotate with the hinged connection with the static contact pad 4 as the central axis, so that the docking piece 54 falls on the top of the moving contact pad 22, and the two sliding frames 25, the conductive piece 26 and the docking tooth plate 28 are pushed by the docking piece 54 to move relative to each other, so that the docking tooth plate 28 is engaged with the racks on both sides of the docking piece 54. The contact area between the docking piece 54 and the docking tooth plate 28 is increased by the engagement of multiple racks to avoid deformation caused by thermal expansion and contraction. At the same time, the docking piece 54 and the docking tooth plate 28 are always in surface contact, ensuring an effective conductive cross-section, avoiding local overheating and arc discharge, and ensuring the reliability of circuit switching.

[0022] On the contrary, when the knife switch body 51 and the docking piece 54 rotate in the opposite direction, the two docking tooth plates 28 move in the opposite direction synchronously, and the circuit between the docking tooth plates 28 and the docking piece 54 can be disconnected. Example

[0023] This embodiment is a second embodiment of the engagement of the butt-jointed tooth plate 28 with the racks on both sides of the butt-jointed member 54. The same parts as the above technical solutions will not be repeated here. Figure 2 and Figure 4 As shown, further, in order to better implement the present invention, the racks on both sides of the docking member 54 and the racks on the docking tooth plate 28 are replaced by a plurality of arc-shaped teeth with the hinge between the knife switch body 51 and the static contact pad 4 as the origin, and the arc-shaped teeth on the docking member 54 and the arc-shaped teeth on the docking tooth plate 28 are staggered. The sliding frame 25, the elastic member 27 and the docking tooth plate 28 are fixedly arranged on the support plate 23, and the docking member 54 is fixedly connected to the knife gate body 51; The knife switch body 51 and the docking piece 54 are driven by a motor or a handwheel to rotate at the hinge between the knife switch body 51 and the static contact pad 4, and the arc-shaped teeth on both sides of the docking piece 54 engage with the arc-shaped teeth on the docking tooth plate 28. In this process, the contact effect between the docking tooth plate 28 and the docking piece 54 can be guaranteed, and the docking efficiency between the docking tooth plate 28 and the docking piece 54 can be guaranteed.

[0024] like Figure 4 and Figure 5 As shown, the top of the moving contact pad 22 is movably sleeved with a guide connecting column 213, the top of the guide connecting column 213 is fixedly mounted with an insulating plate 211, and the moving contact pad 22 is provided with a second reset elastic member 212 for supporting the insulating plate 211 upwards; Both ends of the top of the moving contact pad 22 are fixed with protruding support plates 23, and the protruding support plates 23 are provided with guide grooves 24; A connecting frame is installed at the bottom of the guide connecting column 213 . The sliding frame 25 slides in the guide groove 24 . The sliding frame 25 is hinged to the connecting frame at the bottom of the guide connecting column 213 through a connecting piece 214 .

[0025] The above scheme is adopted: the knife switch body 51 and the docking piece 54 are driven to rotate by an electric or hand wheel, so that the docking piece 54 contacts the top of the insulating plate 211, and the insulating plate 211, the guide connecting column 213 and the connecting frame are pressed down by the docking piece 54, and the second reset elastic piece 212 is compressed. During the downward movement of the connecting frame, the two sliding frames 25 and the docking tooth plate 28 are pulled synchronously relative to each other through the connecting piece 214, so that the docking tooth plate 28 is engaged with the racks on both sides of the docking piece 54, so that the circuit is turned on, and the first reset elastic piece 27 is compressed. The first reset elastic piece 27 ensures the contact effect between the docking tooth plate 28 and the docking piece 54 to avoid poor contact.

[0026] At the same time, when the docking member 54 presses down the insulating plate 211 and pushes the two docking tooth plates 28 to move relative to each other, the first reset elastic member 27 is in a compressed state until the docking member 54 is in a horizontal state, and the rack on the docking tooth plate 28 engages with the rack on the docking member 54, ensuring that the docking member 54 and the docking tooth plate 28 can be accurately docked, and the first reset elastic member 27 is always in a compressed state.

[0027] like Figure 4-Figure 6 As shown, the racks on both sides of the docking member 54 and the racks on the docking tooth plate 28 are in a vertical state, and the racks on the docking tooth plate 28 and the racks on the side of the docking member 54 are staggered; The top and bottom of the knife switch body 51 near the docking member 54 are fixedly mounted with limit baffles 53. The interior of the upper limit baffle 53 is fixedly mounted with an elastic piece 57. The end of the elastic piece 57 contacts the docking member 54. The elastic force of the elastic piece 57 is greater than that of the second resetting elastic member 212. The knife switch body 51 and the docking piece 54 rotate around the hinge of the static contact pad 4 as the central axis, and the docking piece 54 contacts the top of the insulating plate 211 under the action of the elastic sheet 57.

[0028] The above-mentioned solution is adopted: by rotating the knife gate body 51 and the docking piece 54, the docking piece 54 contacts the top of the insulating plate 211 under the action of the elastic sheet 57, pressing down the insulating plate 211. As the knife gate body 51 continues to rotate, the docking piece 54 is in a horizontal state, so that the two docking tooth plates 28 move relatively synchronously and precisely engage with the racks on both sides of the docking piece 54 under the action of the first reset elastic piece 27.

[0029] like Figure 3 、 Figure 4 、 Figures 8-10 As shown, the protection assembly 6 includes a protection kit 61 that is movably mounted on the outside of the knife switch body 51 through a sliding member 65. A notch 64 is opened in the middle of the protection kit 61. A connecting rod 66 is hinged at the bottom of the protection kit 61. The bottom end of the connecting rod 66 is connected to the base 1 through a connecting plate 67. A notch 64 is formed in the middle of the protective assembly 61, and an arc piece is provided at one end of the inner wall of the notch 64; The length of the notch 64 is greater than the length of the docking member 54; During the initial rotation of the knife switch body 51 toward the docking assembly 2, the docking member 54 is located at the notch 64 and contacts the insulating plate 211. During the process of disconnecting the docking member 54 from the insulating plate 211 , the protective assembly 61 moves along the stabilizing transverse groove 52 toward the end of the second insulating column 3 under the action of the connecting rod 66 , so that the docking member 54 is located inside the protective assembly 61 .

[0030] With the above solution, when the switch body 51 is rotated by an electric motor or a hand wheel, the protective assembly 61, under the action of the connecting rod 66, moves along the stabilizing transverse groove 52 via the sliding member 65 toward the end away from the second insulating column 3, so that the docking member 54 is located at the notch 64. At this time, the docking member 54 can contact the top of the insulating plate 211, thereby achieving circuit conduction. When the knife switch body 51 moves in the reverse direction, the protective kit 61 moves in the reverse direction along the stable transverse groove 52 through the sliding part 65 under the action of the connecting rod 66. Since an arc piece is provided at one end of the inner wall of the slot 64, the arc piece guides the docking part 54 to make it shrink into the interior of the protective kit 61, and compresses the elastic piece 57 to ensure that the docking part 54 can normally enter the interior of the protective kit 61. In this process, the protective kit 61 is sleeved on the outside of the docking part 54 to prevent the docking part 54 from being exposed to the outside and eroded by rainwater, thereby increasing the service life of the docking part 54 and ensuring the effect of circuit on-off docking.

[0031] like Figure 3 and Figure 7 As shown, a protective cover 62 is fixed on the top of the protruding support plate 23, and the sliding frame 25, the conductive member 26 and the docking tooth plate 28 are slidably located in the protective cover 62. L-shaped blocking plates 63 are fixed on both sides of the protective kit 61. A transmission rod 56 is provided on the base 1 . The transmission rod 56 is hinged to the knife switch body 51 through a third insulating column 55 . The transmission rod 56 is driven by a hand wheel or a motor.

[0032] The above scheme is adopted: the transmission rod 56 is driven to rotate by a handwheel or a motor, and the knife switch body 51 and the docking part 54 are driven to rotate and dock with the docking component 2 through the third insulating column 55. During the rotation, the protective kit 61 gradually slides, so that the docking part 54 is located at the slot 64, and the insulating plate 211 is pressed down to make the docking tooth plate 28 and the docking part 54 contact and connect. The L-shaped blocking plate 63 will contact with the protective cover 62, and the connection between the protective kit 61 and the protective cover 62 is blocked to realize the protection of the contact point, ensure the stability of the circuit conduction, and improve the service life of the docking part 54 and the docking tooth plate 28. On the contrary, when the conduction is disconnected, the docking tooth plate 28, the first reset elastic part 27, the conductive part 26 and the sliding frame 25 enter the protective cover 62.

[0033] The working principle and use process of the present invention: The transmission rod 56 is driven to rotate by a hand wheel or a motor, and the knife switch body 51 and the docking piece 54 are driven to rotate and dock with the docking assembly 2 through the third insulating column 55. During the rotation, the protective kit 61 slides along the stable transverse groove 52 through the sliding piece 65, so that the docking piece 54 is located at the notch 64. The docking piece 54 contacts the top of the insulating plate 211 under the action of the elastic sheet 57, and presses down the insulating plate 211, the guiding connecting column 213 and the connecting frame through the docking piece 54, and compresses the second reset elastic piece 212. During the downward movement of the connecting frame, the two sliding frames 25 and the docking piece are pulled by the connecting piece 214. The tooth plates 28 move synchronously relative to each other, so that the butt tooth plates 28 engage with the racks on both sides of the butt piece 54, thereby conducting the circuit and compressing the first reset elastic member 27. The first reset elastic member 27 ensures the contact effect between the butt tooth plates 28 and the butt piece 54, thereby avoiding poor contact. At the same time, the engagement of multiple racks increases the contact area between the butt piece 54 and the butt tooth plates 28, thereby avoiding deformation caused by thermal expansion and contraction. At the same time, the butt piece 54 and the butt tooth plates 28 are always in surface contact, thereby ensuring an effective conductive cross section, avoiding local overheating and arc discharge, and ensuring the reliability of the circuit. After the docking piece 54 and the docking tooth plate 28 are docked, the L-shaped blocking plate 63 contacts the protective cover 62, blocking the connection between the protective kit 61 and the protective cover 62, thereby protecting the contact point, ensuring the stability of the circuit conduction, and improving the service life of the docking piece 54 and the docking tooth plate 28. On the contrary, when the conduction is disconnected, the docking tooth plate 28, the first reset elastic member 27, the conductive member 26 and the sliding frame 25 enter the protective cover 62 to avoid exposure and improve the service life. When the knife switch main body 51 moves reversely driven by the motor or hand wheel, the protection kit 61 moves reversely along the stable transverse groove 52 under the action of the connecting rod 66 through the sliding piece 65, and the butt joint piece 54 is guided to shrink into the interior of the protection kit 61 through the arc piece arranged at one end of the inner wall of the slot 64, and the elastic piece 57 is compressed, so that the butt joint piece 54 can normally enter the interior of the protection kit 61, and in this process, the protection kit 61 is arranged outside the butt joint piece 54, so that the butt joint piece 54 is prevented from being exposed to the outside and eroded by rainwater, the service life of the butt joint piece 54 is improved, and the effect of circuit on-off butt joint is ensured.

[0034] It should be noted that the relational terms herein such as first and second and the like are used solely to distinguish one entity or action from another, without necessarily requiring or implying any such actual relationship or order between such entities or actions. Moreover, the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0035] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. An isolating switch, comprising a base (1), a second insulating column (3) fixedly mounted on the top of the base (1), a static contact pad (4) fixedly mounted on the top of the second insulating column (3), characterized in that: Also includes: A knife switch assembly (5), the knife switch assembly (5) being hinged to the static contact pad (4); A docking assembly (2), the docking assembly (2) being fixedly mounted on the top of the base (1); The knife switch assembly (5) comprises a knife switch body (51) hinged on the static contact pad (4), a docking piece (54) is hinged at the end of the knife switch body (51), and a stabilizing transverse groove (52) is provided on the knife switch body (51); The docking assembly (2) comprises a first insulating column (21) fixedly mounted on the top of the base (1), and a moving contact pad (22) is fixedly mounted on the top of the first insulating column (21); A sliding frame (25) is symmetrically provided on the moving contact pad (22), a conductive member (26) is provided on the outside of the sliding frame (25), and an end of the conductive member (26) is connected to a docking tooth plate (28) via a first reset elastic member (27); Racks are equidistantly provided on both sides of the docking piece (54); when the docking piece (54) is located on the moving contact pad (22), two docking tooth plates (28) engage with the racks on both sides of the docking piece (54).

2. The isolating switch according to claim 1, characterized in that: The top movable sleeve of the moving contact pad (22) is provided with a guide connecting column (213), the top of the guide connecting column (213) is fixed with an insulating plate (211), and the moving contact pad (22) is provided with a second reset elastic member (212) for supporting the insulating plate (211) upward.

3. The disconnector according to claim 2, characterized in that: Both ends of the top of the moving contact pad (22) are fixed with protruding support plates (23), and the protruding support plates (23) are provided with guide grooves (24); A connecting frame is installed at the bottom of the guide connecting column (213), and the sliding frame (25) slides in the guide groove (24). The sliding frame (25) is hinged to the connecting frame at the bottom of the guide connecting column (213) through a connecting piece (214).

4. The disconnector according to claim 1, characterized in that: The racks on both sides of the docking member (54) and the racks on the docking tooth plate (28) are both in a vertical state, and the racks on the docking tooth plate (28) and the racks on the side of the docking member (54) are staggered.

5. The disconnector according to claim 4, characterized in that: The top and bottom of the knife gate body (51) close to the docking piece (54) are fixedly provided with a limit baffle (53), and an elastic sheet (57) is fixedly provided inside the upper limit baffle (53), and the end of the elastic sheet (57) contacts the docking piece (54); The knife switch body (51) and the docking piece (54) rotate with the hinge of the static contact pad (4) as the central axis, and the docking piece (54) is in a vertical state under the action of the elastic sheet (57) and contacts the top of the insulating plate (211).

6. The disconnector according to claim 3, characterized in that: The protection assembly (6) includes a protection kit (61) that is movably mounted on the outside of the knife switch body (51) through a sliding member (65), a notch (64) is provided in the middle of the protection kit (61), a connecting rod (66) is hinged at the bottom of the protection kit (61), and the bottom end of the connecting rod (66) is connected to the base (1) through a connecting plate (67).

7. The disconnector according to claim 6, characterized in that: A notch (64) is provided in the middle of the protective kit (61), and an arc piece is provided at one end of the inner wall of the notch (64); The length of the notch (64) is greater than the length of the docking piece (54); During the initial process of the knife switch body (51) rotating toward the docking assembly (2) to conduct, the docking member (54) is located at the notch (64) and contacts the insulating plate (211).

8. The disconnector according to claim 7, characterized in that: During the process of disconnection between the docking member (54) and the insulating plate (211), the protective assembly (61) moves along the stabilizing transverse groove (52) toward the end of the second insulating column (3) under the action of the connecting rod (66), so that the docking member (54) is located inside the protective assembly (61).

9. The disconnector according to claim 8, characterized in that: A protective cover (62) is fixedly mounted on the top of the protruding support plate (23); the sliding frame (25), the conductive member (26) and the docking tooth plate (28) are slidably positioned within the protective cover (62); and L-shaped blocking plates (63) are fixedly mounted on both sides of the protective kit (61).

10. The disconnector according to claim 8, characterized in that: A transmission rod (56) is provided on the base (1), the transmission rod (56) is hinged to the knife switch body (51) via a third insulating column (55), and the transmission rod (56) is driven by a hand wheel or a motor.

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