Interlocking mechanism of disconnecting switch and circuit breaker of high-voltage switchgear
By adopting an interlocking mechanism consisting of a first circuit breaker interlocking plate, a second circuit breaker interlocking plate and a three-position mechanism interlocking slider in a high-voltage switchgear, the interlocking structure is simplified, the problems of complex mechanical interlocking and inconvenient maintenance are solved, and the effects of preventing misoperation and improving maintenance efficiency are achieved.
Patent Information
- Application Number
- CN202422987925.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-04
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-04
AI Technical Summary
The mechanical interlocking structure of existing high-voltage switchgear is complex and inconvenient to maintain, and cannot effectively prevent misoperation.
An interlocking mechanism including a first circuit breaker interlocking plate, a second circuit breaker interlocking plate and a three-position mechanism interlocking slider is adopted. The interlocking of the disconnector and the circuit breaker is achieved through a plug-in structure and a slot structure, which simplifies the interlocking structure and improves the convenience of maintenance.
The interlocking structure is simple, misoperation is prevented, and operational safety and maintenance efficiency are improved.
Smart Images
Figure CN223462152U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-voltage switchgear, in particular to an interlocking mechanism between an isolating switch and a circuit breaker of a high-voltage switchgear. Background Art
[0002] The main switch and ground switch of a conventional disconnector are placed separately, which may lead to misoperation of the main switch and ground switch during use. In the prior art, a three-position disconnector is commonly used to replace the conventional disconnector. The three positions of the three-position disconnector are: the closed position (where the disconnector's main terminals are connected), the disconnecting position (where the main terminals are disconnected), and the grounding position (where the disconnector's grounding is connected). The three-position disconnector integrates the functions of both the disconnector and the grounding switch, performing them with a single disconnector. This allows for mechanical interlocking to prevent the ground switch from closing when the main circuit is energized. To further protect operators and implement the switchgear's "five protections" (preventing the misoperation or misclosing of circuit breakers, preventing the disconnector from pulling or closing under load, preventing the grounding wire (switch) from closing under power (hanging), preventing the circuit breaker (disconnector) from closing with the grounding wire (switch) on, and preventing the operator from mistakenly entering a live compartment), conventional three-position disconnectors are generally equipped with anti-misoperation devices. These anti-misoperation locking devices include: microcomputer anti-misoperation, electrical interlocking, electromagnetic interlocking, mechanical interlocking, mechanical program lock, mechanical lock, and live display device. The mechanical interlocking structure has the advantages of good interlocking effect and wide application range, but the mechanical interlocking structure currently on the market has the disadvantage of complex structure. Utility Model Content
[0003] The technical problem to be solved by the utility model is to provide an interlocking mechanism for an isolating switch and a circuit breaker of a high-voltage switchgear, which has the advantages of a simple interlocking structure and convenient maintenance.
[0004] The utility model provides an interlocking mechanism for an isolating switch and a circuit breaker of a high-voltage switchgear, characterized in that: it comprises a first circuit breaker interlocking plate, a second circuit breaker interlocking plate and a three-position mechanism interlocking slider; the three-position mechanism interlocking slider is fixed on a paddle linkage rod of the isolating switch, the first circuit breaker interlocking plate and the second circuit breaker interlocking plate are both located below the three-position mechanism interlocking slider, the lower end of the first circuit breaker interlocking plate is connected to a main shaft linkage movable pin of the circuit breaker, and the lower end of the second circuit breaker interlocking plate is connected to a limit connecting rod of the circuit breaker; a concave cavity for vertically inserting the upper end of the second circuit breaker interlocking plate is provided in the middle of the lower end of the three-position mechanism interlocking slider; a plug-in structure is provided on the upper end of the first circuit breaker interlocking plate, and a slot structure for vertically cooperating with the plug-in structure is provided on the three-position mechanism interlocking slider located on one side of the concave cavity.
[0005] The utility model discloses a structure which can realize interlocking of disconnecting switch and circuit breaker through the vertical fitting of the upper end of the second circuit breaker interlocking plate and the vertical embedding structure of the cavity and the cooperation and fitting of the plug-in structure of the upper end of the first circuit breaker interlocking plate and the slot structure of the three-position mechanism interlocking slider, compared with the three-position interlocking mechanism of the disconnecting switch and circuit breaker on the market, the utility model has the advantages of simple interlocking structure and convenient maintenance.
[0006] In a possible implementation mode, the plug-in structure comprises two plug-in plates arranged on the upper end of the first circuit breaker interlocking plate, and the two plug-in plates are symmetrically arranged on the upper end of the first circuit breaker interlocking plate; the slot structure comprises two slots symmetrically arranged on the front and rear sidewalls of the three-position mechanism interlocking slider; when the circuit breaker is in the closed state, the two plug-in plates are vertically fitted with one of the slots to limit the horizontal movement of the three-position mechanism interlocking slider; after the above structure is adopted, when the disconnecting switch is in the open state and the circuit breaker is in the closed state, the second circuit breaker interlocking plate can be moved upward under the pushing action of the limiting connecting rod of the circuit breaker, at this time, the upper end of the second circuit breaker interlocking plate can be embedded into the cavity on the lower end of the three-position mechanism interlocking slider, and the first circuit breaker interlocking plate can be moved upward under the pushing action of the main shaft linkage movable pin in the circuit breaker, at this time, the two plug-in plates on the upper end of the first circuit breaker interlocking plate can be vertically fitted with one of the slots on the three-position mechanism interlocking slider, so that the horizontal limiting of the three-position mechanism interlocking slider can be realized, that is, when the circuit breaker is in the closed state, the disconnecting switch can be prevented from being switched to the isolation working state or the grounding working state; when the disconnecting switch is in the open state and the circuit breaker is in the open state, the first circuit breaker interlocking plate and the second circuit breaker interlocking plate can be moved downward to reset, so that the horizontal limiting of the three-position mechanism interlocking slider can be contacted; when the disconnecting switch is in the isolation working state, the toggle linkage rod of the disconnecting switch can drive the three-position mechanism interlocking slider to be in the left limiting position, and when the disconnecting switch is in the grounding working state, the toggle linkage rod of the disconnecting switch can drive the three-position mechanism interlocking slider to be in the right limiting position, that is, at this time, the cavity and the upper end of the second circuit breaker interlocking plate can be in the horizontally staggered state, and the slot on the three-position mechanism interlocking slider can be in the horizontally staggered state with the plug-in plate on the upper end of the first circuit breaker interlocking plate, that is, in this state, when the circuit breaker is closed and the first circuit breaker interlocking plate and the second circuit breaker interlocking plate are moved upward, the first circuit breaker interlocking plate and the second circuit breaker interlocking plate will interfere with the three-position mechanism interlocking slider, so that the accidental closing of the circuit breaker can be avoided.
[0007] In a possible implementation, an inner wall of the lower end of each slot is provided with a guide slope, which is used to guide the side wall of the plug-in board to facilitate the insertion of the plug-in board into the slot; after the adoption of this structure, under the action of the guide slope, when the first circuit breaker interlocking plate drives the two plug-in boards to move upward, each plug-in board can be guided by the corresponding side guide slope to facilitate the insertion of the plug-in board into the slot at the corresponding position.
[0008] In a possible implementation, the interlocking mechanism further comprises a guide plate; the guide plate is fixed on the shell of the circuit breaker, and the guide plate is provided with a first through hole and a second through hole; the first circuit breaker interlocking plate and the second circuit breaker interlocking plate are vertically movably arranged in the first through hole and the second through hole respectively; after the adoption of this structure, when the first circuit breaker interlocking plate moves vertically, the first through hole can play a vertical guiding role for the first circuit breaker interlocking plate, thereby improving the reliability of the vertical movement of the first circuit breaker interlocking plate; similarly, when the second circuit breaker interlocking plate moves vertically, the second through hole can play a vertical guiding role for the second circuit breaker interlocking plate, thereby improving the reliability of the vertical movement of the second circuit breaker interlocking plate; in addition, under the action of the first through hole, the horizontal limiting of the first circuit breaker interlocking plate can be realized, and under the action of the second through hole, the horizontal limiting of the second circuit breaker interlocking plate can be realized.
[0009] In a possible implementation, the interlocking mechanism further comprises a guide bracket and a sliding plate; the guide bracket is fixed on the shell of the circuit breaker, and the guide bracket is provided with a sliding groove; the two ends of the sliding plate are vertically slidably connected in the sliding groove, and the first circuit breaker interlocking plate is fixed to the sliding plate; after the adoption of this structure, under the combined action of the guide bracket and the sliding plate, since the sliding plate is vertically slidably connected to the guide bracket and the first circuit breaker interlocking plate is fixed to the sliding plate, the vertical sliding of the first circuit breaker interlocking plate can be further guided, thereby improving the reliability of the vertical sliding of the first circuit breaker interlocking plate. BRIEF DESCRIPTION OF DRAWINGS
[0010] Fig. 1 It is a schematic diagram of the three-dimensional structure of the utility model;
[0011] Fig. 2 It is a schematic diagram of the front view structure of the utility model;
[0012] Fig. 3 It is a schematic diagram of the three-dimensional structure of the utility model after removing part of the structure. DETAILED DESCRIPTION
[0013] First of all, those skilled in the art should understand that these implementations are only used to explain the technical principles of the embodiments of the present application, and are not intended to limit the protection scope of the embodiments of the present application. Those skilled in the art can make adjustments as needed in order to adapt to specific application occasions.
[0014] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "connected", "connected to", "connection" should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.
[0015] In the embodiments of the present application, unless specifically defined and limited otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.
[0016] The present application will be further described in detail below in combination with the drawings and specific embodiments.
[0017] Referring to Figs. 1-3 As shown in the drawings, the embodiments of the present application disclose an interlocking mechanism of disconnector and circuit breaker of high-voltage switchgear, characterized in that: comprising a first circuit breaker interlocking plate 1, a second circuit breaker interlocking plate 2 and a three-position mechanism interlocking slider 3; the three-position mechanism interlocking slider 3 is fixed on the toggle linkage rod of the disconnector, the first circuit breaker interlocking plate 1 and the second circuit breaker interlocking plate 2 are both below the three-position mechanism interlocking slider 3, the lower end of the first circuit breaker interlocking plate 1 is connected to the main shaft linkage movable pin of the circuit breaker, and the lower end of the second circuit breaker interlocking plate 2 is connected to the limiting connecting rod of the circuit breaker; the middle part of the lower end of the three-position mechanism interlocking slider 3 is provided with a recess cavity 31 for vertically inserting the upper end of the second circuit breaker interlocking plate 2; the upper end of the first circuit breaker interlocking plate 1 is provided with a plug-in structure, and the three-position mechanism interlocking slider 3 on one side of the recess cavity 31 is provided with a plug-in groove structure for vertically cooperating with the plug-in structure.
[0018] The plug-in structure comprises two plug plates 11 arranged on the upper end of the first circuit breaker interlocking plate 1, and the two plug plates 11 are symmetrically arranged on the upper end of the first circuit breaker interlocking plate 1; the slot structure comprises two slots 32 symmetrically arranged on the front and rear sidewalls of the three-position mechanism interlocking slider 3; when the circuit breaker is in the closed state, the two plug plates 11 are vertically matched with one of the slots 32 to limit the horizontal movement of the three-position mechanism interlocking slider 3; by adopting the above structure, when the disconnecting switch is in the open state and the circuit breaker is in the closed state, the second circuit breaker interlocking plate can be moved upward under the pushing action of the limiting connecting rod of the circuit breaker, at this time, the upper end of the second circuit breaker interlocking plate can be embedded into the recess on the lower end of the three-position mechanism interlocking slider, and the first circuit breaker interlocking plate can be moved upward under the pushing action of the main shaft linkage movable pin in the circuit breaker, and at this time, the two plug plates on the upper end of the first circuit breaker interlocking plate can be vertically matched with one of the slots on the three-position mechanism interlocking slider to limit the horizontal movement of the three-position mechanism interlocking slider, that is, when the circuit breaker is in the closed state, the disconnecting switch can be prevented from being switched to the isolation working state or the grounding working state; when the disconnecting switch is in the open state and the circuit breaker is in the open state, the first circuit breaker interlocking plate and the second circuit breaker interlocking plate can be moved downward to reset, so as to limit the horizontal movement of the three-position mechanism interlocking slider; when the disconnecting switch is in the isolation working state, the tab linkage rod of the disconnecting switch can drive the three-position mechanism interlocking slider to the left limiting position, and when the disconnecting switch is in the grounding working state, the tab linkage rod of the disconnecting switch can drive the three-position mechanism interlocking slider to the right limiting position, that is, at this time, the recess and the upper end of the second circuit breaker interlocking plate are in a horizontal misalignment state, and the slot on the three-position mechanism interlocking slider is in a horizontal misalignment state with the plug plate on the upper end of the first circuit breaker interlocking plate, that is, in this state, when the circuit breaker is closed and the first circuit breaker interlocking plate and the second circuit breaker interlocking plate are moved upward, the first circuit breaker interlocking plate and the second circuit breaker interlocking plate will interfere with the three-position mechanism interlocking slider, thereby preventing the accidental closing of the circuit breaker.
[0019] The inner wall of the lower end of each slot 32 is provided with a guide slope 33, which is used to cooperate with the sidewall of the plug plate 11 to guide the plug plate 11 to be inserted into the slot 32; by adopting this structure, under the action of the guide slope, when the first circuit breaker interlocking plate drives the two plug plates to move upward, each plug plate can cooperate with the guide slope on the corresponding side to guide the plug plate to be inserted into the slot on the corresponding position.
[0020] The interlocking mechanism further comprises a guide plate 4 fixed on the housing of the circuit breaker, and the guide plate 4 is provided with a first through hole 41 and a second through hole 42, and the first circuit breaker interlocking plate 1 and the second circuit breaker interlocking plate 2 are vertically movably arranged in the first through hole 41 and the second through hole 42 respectively. By adopting the structure, the first through hole can play a vertical guiding role for the first circuit breaker interlocking plate when the first circuit breaker interlocking plate vertically moves, thereby improving the reliability of the vertical movement of the first circuit breaker interlocking plate. Similarly, the second through hole can play a vertical guiding role for the second circuit breaker interlocking plate when the second circuit breaker interlocking plate vertically moves, thereby improving the reliability of the vertical movement of the second circuit breaker interlocking plate. In addition, the first through hole can realize horizontal limiting of the first circuit breaker interlocking plate, and the second through hole can realize horizontal limiting of the second circuit breaker interlocking plate.
[0021] The interlocking mechanism further comprises a guide bracket 5 and a sliding plate 6. The guide bracket 5 is fixed on the housing of the circuit breaker, and the guide bracket 5 is provided with a sliding groove 51, and both ends of the sliding plate 6 are vertically slidably connected in the sliding groove 51, and the first circuit breaker interlocking plate 1 is fixed with the sliding plate 6. By adopting the structure, under the cooperation of the guide bracket and the sliding plate, since the sliding plate is vertically slidably connected with the guide bracket and the first circuit breaker interlocking plate is fixed with the sliding plate, the vertical sliding of the first circuit breaker interlocking plate can be further guided, thereby improving the reliability of the vertical sliding of the first circuit breaker interlocking plate.
[0022] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.
Claims
1. An interlocking mechanism of a disconnector and a circuit breaker of a high voltage switchgear, characterized in that: The utility model relates to a kind of interlocking mechanism of three-position mechanism, including first circuit breaker interlocking plate (1), second circuit breaker interlocking plate (2) and three-position mechanism interlocking slider (3);The three-position mechanism interlocking slider (3) is fixed on the toggle linkage lever of isolator, and the first circuit breaker interlocking plate (1) and the second circuit breaker interlocking plate (2) are located below the three-position mechanism interlocking slider (3), and the lower end of the first circuit breaker interlocking plate (1) is connected in the main shaft linkage movable pin of circuit breaker, and the lower end of the second circuit breaker interlocking plate (2) is connected in the limiting link of circuit breaker;The middle part of the lower end of the three-position mechanism interlocking slider (3) is provided with recess cavity (31) for the vertical insertion of the upper end of second circuit breaker interlocking plate (2);The upper end of the first circuit breaker interlocking plate (1) is provided with plug-in structure, and the three-position mechanism interlocking slider (3) on the side of the recess cavity (31) is provided with insertion slot structure for vertical cooperation with plug-in structure.
2. The interlocking mechanism of the disconnector and the circuit breaker of the high voltage switchgear according to claim 1, characterized in that: The plug-in structure includes two plug-in plates (11) arranged on the upper end of the first circuit breaker interlocking plate (1), and the two plug-in plates (11) are symmetrically arranged on the upper end of the first circuit breaker interlocking plate (1) in front and back;The insertion slot structure includes two insertion slots (32), and the two insertion slots (32) are symmetrically arranged on the front and back two side walls of the three-position mechanism interlocking slider (3) in front and back;When the circuit breaker is in the closing state, the two plug-in plates (11) are vertically matched with one of the insertion slots (32) to limit the horizontal movement of the three-position mechanism interlocking slider (3).
3. The interlocking mechanism of the disconnector and the circuit breaker of the high voltage switchgear according to claim 2, characterized in that: The inner wall of the lower end of each insertion slot (32) is provided with a guide slope (33), and the guide slope (33) is used for cooperating with the side wall of the plug-in plate (11) to guide the plug-in plate (11) to be inserted into the insertion slot (32).
4. The interlocking mechanism of a disconnector and a circuit breaker of a high voltage switching device according to any one of claims 1 to 3, characterized in that: The interlocking mechanism further includes a guide plate (4), and the guide plate (4) is fixed on the housing of the circuit breaker, and the guide plate (4) is provided with a first through hole (41) and a second through hole (42), and the first circuit breaker interlocking plate (1) and the second circuit breaker interlocking plate (2) are vertically arranged in the first through hole (41) and the second through hole (42) respectively.
5. The interlocking mechanism of a disconnector and a circuit breaker of a high voltage switching device according to any one of claims 1 to 3, characterized in that: The interlocking mechanism further includes a guide bracket (5) and a sliding plate (6), and the guide bracket (5) is fixed on the housing of the circuit breaker, and the guide bracket (5) is provided with a sliding groove (51), and the two ends of the sliding plate (6) are vertically connected in the sliding groove (51), and the first circuit breaker interlocking plate (1) is fixed with the sliding plate (6).