Isolation circuit breaker interlocking mechanism of switchgear

Abstract

The utility model discloses an isolation circuit breaker interlocking mechanism of switch equipment, which comprises an isolation circuit breaker interlocking plate, an interlocking rod and an interlocking crank arm, the isolation circuit breaker interlocking plate is arranged on an isolation mechanism in a manner of moving up and down, and the interlocking crank arm is rotatably arranged on a circuit breaker mechanism through a rotating shaft; the two ends of the interlocking rod are hinged to the isolation circuit breaker interlocking plate and the interlocking crank arm respectively, and the interlocking crank arm drives the isolation circuit breaker interlocking plate to move up and down through the interlocking rod. According to the utility model, the design and processing difficulty is reduced, the space is saved, and the cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of power distribution cabinets for power grids, in particular to an isolating circuit breaker interlocking mechanism for switch equipment. Background Art

[0002] Environmental protection cabinet refers to the electrical equipment (high voltage switchgear) installed in metal or non-metallic insulation cabinet or made into assembled interval ring network power supply unit. It is widely used in distribution stations and box-type substations in urban residential areas, high-rise buildings, large public buildings, factories and enterprises and other load centers. Environmental protection cabinets are divided into upper isolation environmental protection cabinets (isolating switch on the top, circuit breaker on the bottom) and lower isolation environmental protection cabinets (isolating switch on the bottom, circuit breaker on the top) according to the different upper and lower positions of the isolating switch.

[0003] In order to ensure the safety during operation in the upper isolation environmental protection cabinet, the following safety points need to be ensured: (1) After the isolation operating mechanism completes the isolation opening (or grounding opening), the circuit breaker operating mechanism cannot perform the circuit breaking and closing operation. If it does, there will be safety hazards; (2) The circuit breaker can only perform the circuit breaking and closing operation after the isolation operating mechanism completes the isolation closing or grounding closing; (3) When the grounding operating shaft rotates to the grounding opening position, the cabinet door cannot be opened; (4) Ensure that the grounding state cannot be broken when the cabinet door is open, that is, at this time, the grounding switch and the circuit breaker cannot be opened. Therefore, in order to ensure safe operation, in the upper isolation environmental protection cabinet, an isolation and circuit breaker interlocking mechanism and a door interlocking mechanism are usually set.

[0004] Chinese utility model patent 202121521860.1 discloses an interlocking mechanism for isolating and opening the circuit breaker to close the circuit breaker. A first interlocking mechanism is arranged between the isolating mechanism and the circuit breaker mechanism. The first interlocking mechanism includes an isolating interlocking plate, an opening interlocking cam piece, and a closing interlocking limit block. The opening interlocking cam piece is arranged on the indicating shaft of the isolating mechanism, and the closing interlocking limit block is arranged on the closing half shaft of the circuit breaker mechanism. The indicating shaft can drive the isolating interlocking plate to move up and down through the opening interlocking cam piece, so as to realize the locking or releasing of the closing interlocking limit block by the isolating interlocking plate, thereby realizing the interlocking between the isolating mechanism and the circuit breaker mechanism to ensure safe operation. The isolating interlocking plate includes an upper locking plate and a lower locking plate fastened by bolts, and the lower locking plate cooperates with the closing interlocking limit block of the circuit breaker mechanism by a snap connection. The lower locking plate of the interlocking mechanism needs to realize the up and down movement and the engagement with the closing interlocking limit block at the same time. Therefore, in addition to opening a number of sliding slots (long round holes) on the lower locking plate that cooperate with the guide pillars to enable it to move up and down stably, a bayonet for engaging with the closing interlocking limit block is also provided: on the one hand, the structure of the lower locking plate is relatively complex, and the processing procedure is relatively cumbersome. In addition, the sliding slots and bayonet must also take into account the coordination with the guide pillars and the closing interlocking limit block. Therefore, there are specific requirements for the size and assembly of the sliding slots and bayonet, which increases the design and processing difficulty of the lower locking plate; on the other hand, since the lower locking plate needs to move up and down and cooperate with the closing interlocking limit block, in order to ensure reliability, the upper locking plate is usually a relatively large piece and needs to occupy a large space, which will not only make the internal structure of the environmental protection cabinet less compact, but also increase the overall volume of the environmental protection cabinet, which will not only increase the installation space requirements of the environmental protection cabinet, but also increase the cost of the environmental protection cabinet. Utility Model Content

[0005] In view of the shortcomings of the above-mentioned existing interlocking mechanisms, the applicant provides a switchgear isolating circuit breaker interlocking mechanism with a reasonable structure, which simplifies the interlocking structure between the isolating mechanism and the circuit breaker mechanism, reduces the difficulty of design and processing, saves space, and makes the overall structure more compact.

[0006] The technical solution adopted by the utility model is as follows:

[0007] The invention discloses an isolating circuit breaker interlocking mechanism of a switch device, comprising an isolating circuit breaker interlocking plate, an interlocking rod and an interlocking crank arm. The isolating circuit breaker interlocking plate can be movably arranged on the isolating mechanism up and down, and the interlocking crank arm can be rotatably arranged on the circuit breaker mechanism through a rotating shaft; the two ends of the interlocking rod are respectively hinged on the isolating circuit breaker interlocking plate and the interlocking crank arm, and the interlocking crank arm drives the isolating circuit breaker interlocking plate to move up and down through the interlocking rod.

[0008] As a further improvement of the above technical solution:

[0009] The interlocking crank arm is fixedly connected to the rotating shaft, and the rotating shaft is rotatably arranged on the circuit breaker mechanism.

[0010] A plurality of slide grooves are provided on the isolation circuit breaker interlocking plate, and a plurality of guide pillars are correspondingly provided on the isolation mechanism. The guide pillars are inserted into the slide grooves, and the isolation circuit breaker interlocking plate realizes up and down movement through the cooperation of the slide grooves and the guide pillars.

[0011] A parallel inner plate is arranged on the isolating circuit breaker interlocking plate at a corresponding position of at least one slide slot, the inner plate is provided with a corresponding slide slot, and the guide column is passed through the slide slots on the inner plate and the outer plate surface.

[0012] The slide is a vertical oblong hole.

[0013] An isolation shaft shielding portion and a grounding shaft shielding portion are provided on the isolation circuit breaker interlocking plate corresponding to the isolation operating shaft and the grounding operating shaft; when the circuit breaker mechanism is in the open position, the isolation shaft shielding portion blocks the isolation operating shaft, and the grounding shaft shielding portion blocks the grounding operating shaft.

[0014] The beneficial effects of the utility model are as follows:

[0015] The isolating circuit breaker interlocking plate of the isolating circuit breaker interlocking mechanism of the utility model is interlocked with the circuit breaker mechanism through the hinged interlocking rod, interlocking crank arm and rotating shaft transmission, which has the following advantages: on the one hand, since the interlocking rod, interlocking crank arm and rotating shaft only transmit motion, the structure, size and assembly requirements of the interlocking rod, interlocking crank arm and rotating shaft are greatly reduced, and the interlocking rod, interlocking crank arm and rotating shaft can be designed to be simpler and smaller, which reduces the difficulty of design and processing; on the other hand, since the interlocking rod, interlocking crank arm and rotating shaft only perform the task of transmission, other matching requirements are exempted, even if the interlocking rod is designed to be slender and the interlocking crank arm is designed to be smaller, sufficient reliability can be guaranteed, so a lot of space can be saved, not only can the internal structure of the environmental protection cabinet be made more compact, but also the environmental protection cabinet can be designed to be smaller, which not only reduces the requirements of the environmental protection cabinet on the installation space, but also helps to reduce the cost of the environmental protection cabinet.

[0016] An inner plate is arranged on the isolation circuit breaker interlocking plate of the utility model, and a slide groove is correspondingly arranged on the inner plate. The slide groove of the inner plate cooperates with the guide column to provide a limiting effect on the isolation circuit breaker interlocking plate in the axial direction, thereby preventing the isolation circuit breaker interlocking plate from shaking axially along the guide column during the up and down movement, so that the up and down movement of the isolation circuit breaker interlocking plate is smoother and more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 This is a schematic diagram of the mechanism structure of the utility model. At this time, the circuit breaker mechanism is in the open position and the isolation mechanism can be operated.

[0019] Figure 3This is a schematic diagram of the mechanism structure of the utility model. At this time, the circuit breaker mechanism is in the open position and the closed position, and the isolation mechanism is inoperable.

[0020] Figure 4 It is a structural schematic diagram of the isolation circuit breaker interlocking board.

[0021] In the figure: 100, cabinet;

[0022] 1. Isolation mechanism; 11. Isolation operating shaft; 12. Grounding operating shaft;

[0023] 2. Circuit breaker mechanism;

[0024] 3. Isolation circuit breaker interlocking mechanism; 31. Isolation circuit breaker interlocking plate; 311. Slide groove; 312. Inner plate; 313. Isolation shaft shielding part; 314. Grounding shaft shielding part; 32. Interlocking rod; 33. Interlocking crank arm; 34. Guide column; 35. Rotating shaft. DETAILED DESCRIPTION

[0025] The specific implementation of the utility model is described below in conjunction with the accompanying drawings.

[0026] like Figures 1 to 4 As shown, the environmental protection cabinet described in the utility model is an upper isolation environmental protection cabinet. An isolation mechanism 1 and a circuit breaker mechanism 2 are arranged on and above the cabinet body 100 of the environmental protection cabinet. An isolation circuit breaker interlocking mechanism 3 is arranged between the isolation mechanism 1 and the circuit breaker mechanism 2. The isolation circuit breaker interlocking mechanism 3 realizes the interlocking operation between the isolation mechanism 1 and the circuit breaker mechanism 2.

[0027] An isolation operating shaft 11 and a grounding operating shaft 12 are provided on the isolation mechanism 1. The isolation operating shaft 11 rotates between an isolation closing position and an isolation opening position, and the grounding operating shaft 12 rotates between a grounding closing position and a grounding opening position.

[0028] like Figures 2 to 4 As shown, the isolating circuit breaker interlocking mechanism 3 includes an isolating circuit breaker interlocking plate 31, an interlocking rod 32, an interlocking arm 33 and a rotating shaft 35. The two ends of the interlocking rod 32 are respectively hinged on the isolating circuit breaker interlocking plate 31 and the interlocking arm 33. The isolating circuit breaker interlocking plate 31 can be moved up and down on the isolating mechanism 1, close to the isolating operating shaft 11 and the grounding operating shaft 12; the interlocking arm 33 is fixedly connected to the rotating shaft 35, and the rotating shaft 35 is rotatably arranged on the circuit breaker mechanism 2. The rotating shaft 35 can drive the interlocking arm 33 to rotate within the angle range of opening and closing. Figure 2 As shown, when the circuit breaker mechanism 2 is in the open position, the rotating shaft 35 drives the interlocking arm 33 to rotate, and the interlocking arm 33 drives the isolation circuit breaker interlocking plate 31 to move to the upper position through the interlocking rod 32, and the isolation mechanism 1 can be operated. Figure 3As shown, when the circuit breaker mechanism 2 is in the closed position, the rotating shaft 35 drives the interlocking arm 33 to rotate, and the interlocking arm 33 drives the isolating circuit breaker interlocking plate 31 to move down to the lower position through the interlocking rod 32. At this time, the isolating mechanism 1 is inoperable. The isolating circuit breaker interlocking plate 31 of the isolating circuit breaker interlocking mechanism 3 is interlocked with the circuit breaker mechanism 2 through the hinged interlocking rod 32, the interlocking arm 33, and the rotating shaft 35. Compared with the lower locking plate in the prior art, which needs to have the tasks of motion transmission and coordination at the same time, the interlocking rod 32, the interlocking arm 33, and the rotating shaft 35 of the utility model only undertake the transmission task. This has the following advantages: on the one hand, since the interlocking rod 32, the interlocking arm 33, and the rotating shaft 35 only perform motion transmission, the requirements for the structure, size, and assembly of the interlocking rod 32, the interlocking arm 33, and the rotating shaft 35 are greatly reduced. The interlocking rod 32, the interlocking arm 33, and the rotating shaft 35 can be designed to be simpler and more compact, which reduces the difficulty of design and processing; on the other hand, since the interlocking rod 32, the interlocking arm 33, and the rotating shaft 35 only perform the task of transmission, other matching requirements are eliminated. Even if the interlocking rod 32 is designed to be more slender and the interlocking arm 33 is designed to be more compact, sufficient reliability can be guaranteed. Therefore, a lot of space can be saved, which can not only make the internal structure of the environmental protection cabinet more compact, but also make the environmental protection cabinet smaller, which not only reduces the requirements of the environmental protection cabinet for installation space, but also helps to reduce the cost of the environmental protection cabinet.

[0029] like Figures 2 to 4 As shown, the isolation circuit breaker interlocking plate 31 is provided with a plurality of slide grooves 311, which are vertical oblong holes. A plurality of guide pillars 34 are correspondingly provided on the isolation mechanism 1, and the guide pillars 34 are inserted into the slide grooves 311. The isolation circuit breaker interlocking plate 31 is moved up and down by the cooperation between the slide grooves 311 and the guide pillars 34. A parallel inner plate 312 is provided on the isolating circuit breaker interlock plate 31 at a corresponding position of at least one slide groove 311. There is a certain distance between the inner plate 312 and the outer plate surface of the isolating circuit breaker interlock plate 31. The inner plate 312 is also provided with a corresponding slide groove 311. The guide column 34 is passed through the slide groove 311 between the inner plate 312 and the outer plate surface of the isolating circuit breaker interlock plate 31. The slide groove 311 of the inner plate 312 cooperates with the guide column 34 to provide a limiting effect on the axial direction of the guide column 34 for the isolating circuit breaker interlock plate 31, thereby preventing the isolating circuit breaker interlock plate 31 from shaking axially along the guide column 34 during the up and down movement, thereby making the up and down movement of the isolating circuit breaker interlock plate 31 smoother and more reliable. An isolating shaft shielding portion 313 and a grounding shaft shielding portion 314 are provided on the isolating circuit breaker interlock plate 31 corresponding to the isolating operating shaft 11 and the grounding operating shaft 12. Figure 2 As shown, when the circuit breaker mechanism 2 is in the open position, the isolating shaft shielding portion 313 blocks the isolating operating shaft 11, and the grounding shaft shielding portion 314 blocks the grounding operating shaft 12. At this time, the isolating operating shaft 11 and the grounding operating shaft 12 are prohibited from operating.

[0030] The above description is an explanation of the utility model, not a limitation of the utility model. The utility model can be modified in any form without violating the spirit of the utility model.

Claims

1. An isolating circuit breaker interlocking mechanism for a switchgear, characterized in that: The invention comprises an isolating circuit breaker interlocking plate (31), an interlocking rod (32) and an interlocking crank arm (33); the isolating circuit breaker interlocking plate (31) is movably arranged on the isolating mechanism (1) up and down; the interlocking crank arm (33) is rotatably arranged on the circuit breaker mechanism (2) via a rotating shaft (35); two ends of the interlocking rod (32) are respectively hinged on the isolating circuit breaker interlocking plate (31) and the interlocking crank arm (33); the interlocking crank arm (33) drives the isolating circuit breaker interlocking plate (31) to move up and down via the interlocking rod (32).

2. The isolating circuit breaker interlocking mechanism of the switchgear according to claim 1, characterized in that: The interlocking crank arm (33) is fixedly connected to the rotating shaft (35), and the rotating shaft (35) is rotatably arranged on the circuit breaker mechanism (2).

3. The isolating circuit breaker interlocking mechanism of the switchgear according to claim 1, characterized in that: A plurality of slide grooves (311) are provided on the isolation circuit breaker interlocking plate (31), and a plurality of guide pillars (34) are correspondingly provided on the isolation mechanism (1). The guide pillars (34) are inserted into the slide grooves (311), and the isolation circuit breaker interlocking plate (31) moves up and down through the cooperation between the slide grooves (311) and the guide pillars (34).

4. The isolating circuit breaker interlocking mechanism of the switchgear according to claim 1, characterized in that: A parallel inner plate (312) is provided on the isolating circuit breaker interlocking plate (31) at a position corresponding to at least one slide groove (311), the inner plate (312) is provided with a corresponding slide groove (311), and the guide column (34) is inserted through the slide groove (311) between the inner plate (312) and the outer plate surface.

5. The isolating circuit breaker interlocking mechanism of the switchgear according to claim 3 or 4, characterized in that: The slide groove (311) is a vertical oblong hole.

6. The isolating circuit breaker interlocking mechanism of the switchgear according to claim 1, characterized in that: An isolating shaft shielding portion (313) and a grounding shaft shielding portion (314) are provided on the isolating circuit breaker interlock plate (31) corresponding to the isolating operating shaft (11) and the grounding operating shaft (12); when the circuit breaker mechanism (2) is in the open position, the isolating shaft shielding portion (313) blocks the isolating operating shaft (11), and the grounding shaft shielding portion (314) blocks the grounding operating shaft (12).

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