Mechanical locking structure for disconnecting switch and circuit breaker of electric appliance switch cabinet

Abstract

The utility model relates to a mechanical locking structure for an isolating switch and a circuit breaker of an electric appliance switch cabinet, which comprises a switch cabinet, a first isolating switch operating mechanism aluminum support, a second isolating switch operating mechanism aluminum support and a locking mounting groove plate which are arranged on the switch cabinet, and the locking mounting groove plate is vertically arranged. The first isolating switch operating mechanism aluminum support and the second isolating switch operating mechanism aluminum support are arranged up and down and are positioned on the side surface of the locking mounting groove plate; a first operating mechanism linkage bent plate and a second operating mechanism linkage bent plate are vertically and slidably installed in the first isolating switch operating mechanism aluminum support and the second isolating switch operating mechanism aluminum support respectively and are connected with a locking linkage plate through positioning screws. And the locking linkage plate vertically slides in the locking mounting groove plate. The isolating switch is installed on a cabinet body of a medium-voltage cabinet, the mechanical operation is reliable, and electrical accidents caused by hot-line operation of the isolating switch are avoided.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical cabinets and relates to a mechanical interlocking structure for isolating switches and circuit breakers used in electrical switch cabinets. Background Technique

[0002] The medium-voltage cabinet, also known as the metal-clad medium-voltage draw-out switchgear, belongs to the high-voltage power distribution device. A circuit breaker is installed in the medium-voltage cabinet. When the circuit breaker is in the working position, it is necessary to ensure that the outside cannot operate the isolating switch inside the medium-voltage cabinet. At present, the common interlocking method for isolating switches and circuit breakers in 10kV double-bus medium-voltage switchgear is to install electromagnetic locks on the operating mechanisms of two isolating switches to achieve interlocking through an electrical method, but this method has certain safety hazards. Summary of the Invention

[0003] The purpose of the utility model is to provide a mechanical interlocking structure for isolating switches and circuit breakers used in electrical switch cabinets, which can solve the above problems.

[0004] According to the technical solution provided by the utility model: a mechanical interlocking structure for isolating switches and circuit breakers used in electrical switch cabinets includes a switch cabinet, on which an aluminum support for the first isolating switch operating mechanism, an aluminum support for the second isolating switch operating mechanism, and a locking installation groove plate are installed. The locking installation groove plate is arranged vertically, and the aluminum support for the first isolating switch operating mechanism and the aluminum support for the second isolating switch operating mechanism are arranged up and down and are located on the side of the locking installation groove plate; a first operating mechanism linkage bent plate and a second operating mechanism linkage bent plate are vertically slidably installed in the aluminum support for the first isolating switch operating mechanism and the aluminum support for the second isolating switch operating mechanism respectively. The first operating mechanism linkage bent plate and the second operating mechanism linkage bent plate are connected to a locking linkage plate through positioning screws, and the locking linkage plate slides vertically in the locking installation groove plate; a first operating hole and a second operating hole are respectively opened in the aluminum support for the first isolating switch operating mechanism and the aluminum support for the second isolating switch operating mechanism; an interlocking mechanism and a circuit breaker guide rail are arranged below the locking linkage plate.

[0005] As a further improvement of the utility model, the interlocking mechanism includes an interlocking frame, in which an interlocking main shaft is horizontally rotatably installed. Transmission plates and driving plates are fixedly installed at both ends of the interlocking main shaft. The transmission plate drives the locking linkage plate to move up and down. The driving plate is connected to a movable rod through a pin shaft. Movable openings are opened in the interlocking frame and the circuit breaker guide rail, and the end of the movable rod moves in the movable opening.

[0006] As a further improvement of the utility model, a circuit breaker is slidably installed in the circuit breaker guide rail, and a circuit breaker limit strip is installed outside the circuit breaker.

[0007] As a further improvement of the utility model, a linkage bottom plate is installed at the bottom of the locking linkage plate. A sliding groove is horizontally opened on the linkage bottom plate. A transmission pin is installed at the end of the transmission plate, and the middle part of the transmission pin is located in the sliding groove.

[0008] As a further improvement of the present utility model, the driving plate is connected to the movable rod through a pin shaft.

[0009] The positive and progressive effects of this application are as follows:

[0010] The present utility model is installed on the medium-voltage cabinet body, and the mechanical operation is reliable, avoiding electrical accidents caused by operating the disconnector under live conditions. Description of the Drawings

[0011] Figure 1 It is a schematic structural diagram of the present utility model.

[0012] Figure 2 It is a schematic structural diagram of the interlocking mechanism in the present utility model.

[0013] Figure 3 It is a schematic structural diagram of the circuit breaker of the present utility model in the test position.

[0014] Figure 4 It is a schematic structural diagram of the circuit breaker of the present utility model in the working position. Detailed Embodiments

[0015] It should be noted that, without conflict, the embodiments in the present utility model and the features in the embodiments can be combined with each other. The present utility model will be described in detail below with reference to the drawings and in combination with the embodiments.

[0016] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0017] It should be noted that the terms "first", "second", etc. in the description, claims and the above-mentioned drawings of the present utility model are used to distinguish similar objects, and do not necessarily need to describe a specific order or sequence. It should be understood that such used data can be interchanged under appropriate circumstances, so as to implement the embodiments of the present utility model described herein. In addition, similar terms such as "including" and "having" mean that in addition to the content already listed in "including" and "having", other content that has not been listed can also be "included" and "had"; for example, a process, method, system, product or device that may include a series of steps or units does not have to be limited to those steps or units that have been clearly listed, but may include other steps or units that have not been clearly listed or are inherent to these processes, methods, products or devices.

[0018] Due to the drawing angle problem, some components may not be drawn, but their positions and connection relationships can be understood according to the text expression part.

[0019] Such as Figure 1 As shown, the present utility model is a mechanical interlocking structure for a disconnecting switch and a circuit breaker of an electrical switch cabinet, including a switch cabinet 38, on which a first disconnecting switch operating mechanism aluminum support 3, a second disconnecting switch operating mechanism aluminum support 4, and a locking installation groove plate 7 are installed. The locking installation groove plate 7 is vertically arranged, and the first disconnecting switch operating mechanism aluminum support 3 and the second disconnecting switch operating mechanism aluminum support 4 are arranged up and down and located on the side of the locking installation groove plate 7.

[0020] A first operating mechanism linkage bent plate 5 and a second operating mechanism linkage bent plate 6 are respectively vertically slidably installed in the first disconnecting switch operating mechanism aluminum support 3 and the second disconnecting switch operating mechanism aluminum support 4. The first operating mechanism linkage bent plate 5 and the second operating mechanism linkage bent plate 6 are connected to a locking linkage plate 8 through positioning screws 10, and the locking linkage plate 8 vertically slides in the locking installation groove plate 7. First operating holes and second operating holes are respectively opened in the first disconnecting switch operating mechanism aluminum support 3 and the second disconnecting switch operating mechanism aluminum support 4, and the opening and closing of the first operating hole and the second operating hole are realized by the up and down movement of the first operating mechanism linkage bent plate 5 and the second operating mechanism linkage bent plate 6.

[0021] An interlocking mechanism and a circuit breaker guide rail 30 are provided below the locking linkage plate 8. Such as Figure 2 As shown, the interlocking mechanism includes an interlocking frame 11. An interlocking main shaft 31 is horizontally rotatably installed in the interlocking frame 11. Transmission plates 12 and driving plates 32 are fixedly installed at both ends of the interlocking main shaft 31. The transmission plate 12 drives the locking linkage plate 8 to move up and down. The driving plate 32 is connected to a movable rod 13 through a pin shaft. Moving openings are provided on the interlocking frame 11 and the circuit breaker guide rail 30, and the end of the movable rod 13 moves in the moving opening. A circuit breaker 17 is slidably installed in the circuit breaker guide rail 30, and a circuit breaker limit strip 17-1 is installed outside the circuit breaker.

[0022] Specifically, a linkage bottom plate 9 is installed at the bottom of the locking linkage plate 8. A sliding groove is horizontally formed on the linkage bottom plate 9. A transmission pin is installed at the end of the transmission plate 12, and the middle part of the transmission pin is located in the sliding groove. When the interlock main shaft 31 rotates, it drives the transmission plate 12 and the transmission pin to rotate. While the transmission pin horizontally moves in the sliding groove, it drives the linkage bottom plate 9 and the locking linkage plate 8 to move up and down.

[0023] Specifically, the driving plate 32 is connected to the movable rod 13 through a pin shaft, and the movable port limits the movable range of the movable rod 13.

[0024] In order to ensure that the first operating mechanism linkage bent plate 5 and the second operating mechanism linkage bent plate 6 are in the upper position, tension springs are installed between the first operating mechanism linkage bent plate 5 and the locking installation groove plate 7 and between the second operating mechanism linkage bent plate 6 and the locking installation groove plate 7. The upper end of the tension spring is connected to the locking installation groove plate 7, and the lower end of the tension spring is connected to the operating mechanism linkage bent plate.

[0025] The working process of the present utility model is as follows:

[0026] As Figure 3 shown, in working state 1 where the circuit breaker is in the test position: Press down the first operating mechanism linkage bent plate 5 or the second operating mechanism linkage bent plate 6, push the positioning screw 10 to press the locking linkage plate 8 to move downward. The locking linkage plate 8 drives the transmission plate 12 to move downward through the linkage bottom plate 9. The downward rotation of the transmission plate 12 drives the movable rod 13 to move towards the circuit breaker side. At this time, the circuit breaker limit bar 17-1 is located at a place where it does not contact the side of the movable rod 13, and the movable rod 13 can be fully extended. After the first operating mechanism linkage bent plate 5 or the second operating mechanism linkage bent plate 6 moves downward, the corresponding first operating hole or second operating hole is exposed. At this time, insert an external operating handle into the operating hole to perform relevant operations.

[0027] As Figure 4 shown, in working state 2 where the circuit breaker is in the working position: Press down the first operating mechanism linkage bent plate 5 or the second operating mechanism linkage bent plate 6, push the positioning screw 10 to press the locking linkage plate 8 to move downward. The locking linkage plate 8 drives the transmission plate 12 to move downward through the linkage bottom plate 9. The downward rotation of the transmission plate 12 drives the movable rod 13 to move towards the circuit breaker side. At this time, the circuit breaker limit bar 17-1 is located directly in front of the movable rod 13, and the two come into contact, causing the first operating mechanism linkage bent plate 5 or the second operating mechanism linkage bent plate 6 not to be able to move downward, and the first operating hole and the second operating hole cannot be exposed. At this time, it is prohibited to operate the disconnector operating mechanism.

[0028] It is understandable that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present utility model. However, the present utility model is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these modifications and improvements are also regarded as the protection scope of the present utility model.

Claims

1. A mechanical interlocking structure for a disconnector and a circuit breaker of an electrical switchgear cabinet, including a switchgear cabinet (38), characterized in that, On the switch cabinet (38), a first isolating switch operating mechanism aluminum support (3), a second isolating switch operating mechanism aluminum support (4), and a locking installation groove plate (7) are installed. The locking installation groove plate (7) is arranged vertically. The first isolating switch operating mechanism aluminum support (3) and the second isolating switch operating mechanism aluminum support (4) are arranged vertically one above the other and are located on the side of the locking installation groove plate (7). A first operating mechanism linkage bent plate (5) and a second operating mechanism linkage bent plate (6) are vertically slidably installed in the first isolating switch operating mechanism aluminum support (3) and the second isolating switch operating mechanism aluminum support (4) respectively. The first operating mechanism linkage bent plate (5) and the second operating mechanism linkage bent plate (6) are connected to a locking linkage plate (8) by positioning screws (10). The locking linkage plate (8) slides vertically in the locking installation groove plate (7). A first operating hole and a second operating hole are respectively formed in the first isolating switch operating mechanism aluminum support (3) and the second isolating switch operating mechanism aluminum support (4). An interlocking mechanism and a circuit breaker guide rail (30) are arranged below the locking linkage plate (8).

2. The mechanical interlock structure of the disconnecting switch and the circuit breaker for the electrical switchgear as described in claim 1, characterized in that, The interlocking mechanism includes an interlocking frame (11). An interlocking main shaft (31) is horizontally rotatably installed in the interlocking frame (11). A driving plate (12) and a driving plate (32) are fixedly installed at both ends of the interlocking main shaft (31). The driving plate (12) drives the locking linkage plate (8) to move up and down. The driving plate (32) is connected to a movable rod (13) through a pin shaft. An activity opening is formed in the interlocking frame (11) and the circuit breaker guide rail (30). The end of the movable rod (13) moves in the activity opening.

3. The mechanical interlocking structure for the disconnecting switch and the circuit breaker of the electrical switchgear cabinet according to claim 1, characterized in that, A circuit breaker (17) is slidably installed in the circuit breaker guide rail (30). A circuit breaker limit strip (17-1) is installed outside the circuit breaker.

4. The mechanical interlock structure for the disconnecting switch and the circuit breaker of the electrical switchgear cabinet according to claim 1, characterized in that, A linkage bottom plate (9) is installed at the bottom of the locking linkage plate (8). A chute is horizontally formed in the linkage bottom plate (9). A transmission pin is installed at the end of the driving plate (12). The middle part of the transmission pin is located in the chute.

5. The mechanical interlock structure for the disconnecting switch and the circuit breaker of the electrical switchgear cabinet according to claim 1, characterized in that, The driving plate (32) is connected to the movable rod (13) through a pin shaft.

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