A high-voltage cabinet grounding knife interlocking device

Abstract

The utility model relates to high pressure cabinet ground connection sword field especially relates to a high pressure cabinet ground connection sword interlocking device, and one side of cabinet body is equipped with operating knife gap, and operating knife gap is connected with drive main shaft transmission coupling through connecting block, and drive main shaft other end links with ground connection sword through connecting rod mechanism, and is driven ground connection sword to carry out the switching operation through operating knife gap, in the utility model, the relevant components of partial ground connection sword interlocking mechanism are installed on the rotatable maintenance board, and the connection of drive main shaft and operating knife gap can be disconnected through the push block mechanism on the removal maintenance board, and the corresponding components can be unfolded from the cabinet body outside through the rotation to directly maintain, and the maintenance efficiency and the operation stability of interlocking mechanism are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage switchgear grounding switch technology, and in particular to a high-voltage switchgear grounding switch interlocking device. Background Technology

[0002] The high-voltage switchgear grounding interlock device is a mandatory mechanical safety mechanism installed inside metal-enclosed switchgear. It is a key means of achieving the "preventing accidental entry into energized compartments" requirement in the "five defenses" of the power system.

[0003] Currently, existing interlocking devices mainly consist of a grounding knife operating main shaft, a transmission linkage mechanism, and a cabinet door locking tongue. Although such interlocking devices effectively ensure safety in principle, the traditional design highly integrates the entire linkage mechanism inside the high-voltage cabinet, which brings significant challenges to operation and maintenance. When problems such as linkage mechanism failure or jamming are found, operators need to crawl into the narrow space to complete the maintenance. Once a fault occurs, maintenance personnel cannot directly observe the complete status and movement trajectory of the mechanism, which brings great difficulties to fault location. Utility Model Content

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by proposing a high-voltage switch grounding interlock device.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: A high-voltage switch grounding switch interlocking device includes a cabinet. An operating switch is provided on one side of the cabinet. The operating switch is connected to the drive spindle via a connecting block. The other end of the drive spindle is connected to the grounding switch via a linkage mechanism. The operating switch drives the grounding switch to perform opening and closing operations. The connecting block is installed on a rotatable maintenance plate on the side of the cabinet. One end of the connecting block is connected to the drive spindle via a sliding key, and the other end is connected to the drive head of the operating knife switch via a plug-in connection to achieve torque transmission. The outer wall of the maintenance plate is provided with a push block, which is connected to the connecting block to achieve synchronous movement. The side of the push block is provided with a positioning slot, which can be used to lock the horizontal position by vertically inserting it with a card.

[0006] In addition, a preferred structure is that one end of the operating switch extends into the cabinet and is connected to a drive head, and a rectangular slot matching the connector is provided on one side of the drive head.

[0007] In addition, a preferred structure is that a slot is provided on one side of the outer wall of the cabinet, and a maintenance plate is hinged to the bottom of the slot. Under normal working conditions, the maintenance plate covers the outer wall of the cabinet.

[0008] In addition, in a preferred structure, one end of the maintenance plate is rotatably mounted with a drive spindle via a bracket, one end of the drive spindle is sleeved with a connecting block via a sliding key, and the other end passes through the internal partition of the cabinet and is connected to a linkage mechanism, the bottom of the linkage mechanism is connected to a grounding knife via a universal joint.

[0009] In addition, a preferred structure is that the outer wall of the maintenance plate is provided with a groove for mounting a push block, one end of the push block passes through the groove and is connected to the connecting block, and a slot is provided on the side away from the groove for vertically limiting and slidingly installing a card, the card moves vertically in the slot and hangs down naturally under its own weight.

[0010] The beneficial effects of this utility model are as follows: In this invention, some components of the grounding switch interlocking mechanism are mounted on a rotatable maintenance plate. The connection between the drive spindle and the operating switch can be disconnected by moving the push block mechanism on the maintenance plate. The corresponding components can be displayed from outside the cabinet for direct maintenance by rotating the plate, which effectively improves maintenance efficiency and the operational stability of the interlocking mechanism. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external structure of a high-voltage switchgear grounding interlocking device proposed in this utility model; Figure 2 This is a schematic diagram of the drive spindle mounting structure proposed in this utility model; Figure 3 This is a schematic diagram of the installation structure of the linkage mechanism proposed in this utility model; Figure 4 This is a schematic diagram of the drive head connection structure proposed in this utility model; Figure 5 This is a schematic diagram of the unfolded structure of the maintenance plate proposed in this utility model; Figure 6 This is a schematic diagram of the connecting block connection structure proposed in this utility model; Figure 7 This is a schematic diagram of the push block connection structure proposed in this utility model.

[0012] In the diagram: 1. Cabinet; 2. Operating switch; 21. Drive head; 3. Maintenance plate; 4. Connecting block; 41. Connecting head; 5. Return spring; 6. Drive spindle; 61. Linkage mechanism; 62. Universal joint; 7. Grounding switch; 8. Slide; 9. Push block; 10. Card. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0014] Reference Figure 1-7 A high-voltage switch grounding switch interlocking device includes a cabinet 1. An operating switch 2 is provided on one side of the cabinet 1. The operating switch 2 is connected to the drive spindle 6 via a connecting block 4. The other end of the drive spindle 6 is connected to the grounding switch 7 via a linkage mechanism 61. The operating switch 2 drives the grounding switch 7 to perform opening and closing operations. The connecting block 4 is installed on the rotatable maintenance plate 3 on the side of the cabinet 1. One end of the connecting block 4 is connected to the drive spindle 6 through a sliding key, and the other end is connected to the drive head 21 of the operating knife switch 2 through a plug-in connection to achieve torque transmission. One end of the operating knife switch 2 extends into the cabinet 1 and is connected to the drive head 21. A rectangular slot matching the connector 41 is opened on one side of the drive head 21.

[0015] The outer wall of the maintenance plate 3 is provided with a push block 9, which is connected to the connecting block 4 to achieve synchronous movement. The side of the push block 9 is provided with a positioning slot, which can be vertically inserted with the card 10 to achieve horizontal position locking.

[0016] A slot is provided on one side of the outer wall of the cabinet 1. A maintenance plate 3 is hinged to the bottom of the slot. Under normal working conditions, the maintenance plate 3 covers the outer wall of the cabinet 1. One end of the maintenance plate 3 is rotatably mounted with a drive spindle 6 via a bracket. One end of the drive spindle 6 is connected to the connecting block 4 via a sliding key. The drive spindle 6 and the connecting block 4 are connected by a return spring 5. The return spring 5 provides the lateral movement reset function of the connecting block 4 and does not participate in torque transmission.

[0017] Furthermore, the other end of the drive spindle 6 passes through the internal partition of the cabinet 1 and is connected to the linkage mechanism 61. The bottom of the linkage mechanism 61 is connected to the grounding knife 7 through the universal joint 62. The outer wall of the maintenance plate 3 is provided with a groove 8 for mounting a push block 9. One end of the push block 9 passes through the groove 8 and is connected to the connecting block 4. A slot is provided on the side away from the groove 8 for vertically limiting and sliding installation of a card 10. The card 10 moves vertically in the slot and hangs down naturally under its own weight.

[0018] In this embodiment, the push block 9 is unlocked by moving the card 10 upward to disengage it from the vertical slot in the middle of the push block 9, and then the push block 9 is moved to drive the connector 41 to disengage from the drive head 21 of the operating knife switch 2, thus disconnecting the connection between the operating knife switch 2 and the connector 41. At this time, the maintenance plate 3 is slowly flipped to drive the disconnected connecting block 4, drive spindle 6, and linkage mechanism 61 to detach from the cabinet 1. The linkage mechanism 61 is connected to the grounding knife 7 through the universal joint 62. After the maintenance plate 3 is flipped, the universal joint 62 realizes the rotation displacement function. The linkage mechanism 61 is used to transmit power in the vertical direction to control the grounding knife 7 to realize the locking function. In order to adapt to the rotation adjustment needs of the system after locking, the universal joint 62 is set in the linkage mechanism 61 so that it can still maintain the effective transmission of motion when the axial angle changes, thereby ensuring that the normal operation of the grounding knife 7 is not affected under various working conditions.

[0019] At this point, the main shaft and linkage mechanism, once removed, can be maintained from the outside. Compared to the traditional structure that requires operators to enter the cabinet for maintenance, this mechanism significantly improves the ease of maintenance for the grounding interlock mechanism.

[0020] It should be noted that the grounding switch 7 uses an interlocking mechanism to achieve the locking function, which is a mature existing technology. Its specific working principle will not be elaborated here.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A high-voltage switchgear grounding interlocking device, comprising a cabinet (1), characterized in that, The cabinet (1) is provided with an operating switch (2) on one side. The operating switch (2) is connected to the drive spindle (6) via a connecting block (4). The other end of the drive spindle (6) is connected to the grounding switch (7) via a linkage mechanism (61). The operating switch (2) drives the grounding switch (7) to perform opening and closing operations. The connecting block (4) is installed on the rotatable maintenance plate (3) on the side of the cabinet (1). One end of the connecting block (4) is connected to the drive spindle (6) through a sliding key, and the other end is connected to the drive head (21) of the operating knife switch (2) through a plug-in connection to achieve torque transmission. The outer wall of the maintenance plate (3) is provided with a push block (9), which is connected to the connecting block (4) to achieve synchronous movement. The side of the push block (9) is provided with a positioning slot, which can be vertically inserted with the card (10) to achieve horizontal position locking.

2. The high-voltage switchgear grounding interlocking device according to claim 1, characterized in that, One end of the operating knife switch (2) extends into the cabinet (1) and is connected to the drive head (21). A rectangular slot matching the connector (41) is provided on one side of the drive head (21).

3. The high-voltage switchgear grounding switch interlocking device according to claim 1, characterized in that, A slot is provided on one side of the outer wall of the cabinet (1), and a maintenance plate (3) is hinged to the bottom of the slot. Under normal working conditions, the maintenance plate (3) covers the outer wall of the cabinet (1).

4. The high-voltage switchgear grounding switch interlocking device according to claim 3, characterized in that, One end of the maintenance plate (3) is rotatably mounted with a drive spindle (6) via a bracket. One end of the drive spindle (6) is connected to the connecting block (4) via a sliding key, and the other end passes through the internal partition of the cabinet (1) and is connected to the linkage mechanism (61). The bottom of the linkage mechanism (61) is connected to the grounding knife (7) via a universal joint (62).

5. A high-voltage switchgear grounding switch interlocking device according to claim 1, characterized in that, The outer wall of the maintenance plate (3) is provided with a sliding groove (8) to assemble a push block (9). One end of the push block (9) passes through the sliding groove (8) and is connected to the connecting block (4). A slot is provided on the side away from the sliding groove (8) to vertically limit the sliding installation of a card (10). The card (10) moves vertically in the slot and hangs down naturally under its own weight.

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