Switch cabinet electric grounding switch locking mechanism

Abstract

The utility model discloses a locking mechanism for an electric ground knife switch of a switch cabinet, which belongs to the technical field of switch cabinets, solves the problem that the existing electric ground knife switch occupies too large internal space of an electronic switch cabinet, and comprises a mounting plate, an electric ground knife switch assembly, a circuit connecting assembly, a side plate and a matching piece. According to the utility model, the opening and closing condition of the electric grounding knife-switch can be observed and blocked, and the operation mode that a grounding switch operation shaft is linked with a slip sheet to move up and down in the switch cabinet to disconnect a circuit is changed; according to the utility model, the space occupied by the existing electric grounding knife switch closing structure in the switch cabinet is reasonably utilized, the electric grounding knife switch is ensured to be in an off state when internal parts of the switch cabinet are overhauled, the safety of equipment operation is ensured, the internal space of the switch cabinet is effectively saved, and the practicability is strong.

Description

Technical Field

[0001] The utility model belongs to the technical field of switch cabinets, and particularly relates to an electric grounding knife locking mechanism for a switch cabinet. Background Technique

[0002] The grounding knife, whose full name is the grounding disconnecting switch, is a safety interlocking mechanism installed in a high-voltage switch cabinet to replace the grounding wire. According to the requirements of the five-prevention, the grounding knife can only be closed when the equipment is under maintenance and the circuit breaker and disconnector are disconnected, which is equivalent to a grounding wire. During normal operation, the grounding knife must be disconnected, and usually, a mechanical interlocking device is provided in the equipment. When the circuit breaker is closed, the grounding knife cannot be closed; similarly, when the grounding knife is closed, the high-voltage circuit breaker cannot be closed.

[0003] Chinese Utility Model Patent CN202121241U discloses an anti-misoperation locking device for an electric grounding knife of a medium-voltage switch cabinet, which includes: a connecting sleeve for the grounding switch operating shaft of the grounding switch group, a cam, a stop washer, and a display identification ring are fixed at one end of the sleeve; in the guide vane assembly, a bearing seat rotatably connected to the sleeve is sleeved on the side of the sliding vane, the sliding vane can slide up and down relative to the bearing seat, and a guide pin for positioning the up and down movement of the sliding vane is provided on the sliding vane; the rotating shaft of the bearing bracket of the guide rail assembly is hinged to the top of the sliding vane through a crank and a pull rod; the U-shaped swing frame of the bearing bracket is sleeved in the U-shaped fixed frame, a torsion spring is sleeved on the rotating shaft and its two ends are in contact with the swing frame and the top of the bearing bracket; a movable rod in the long strip-shaped hole groove on the fixed frame is connected to the middle of the telescopic piece, and the two wings of the swing frame are connected to the two ends of the movable rod.

[0004] The above anti-misoperation locking device for the electric grounding knife of the medium-voltage switch cabinet can flexibly and stably complete the opening and closing operations of the electric grounding knife through the design and use of multiple groups of components. However, in actual use, this design requires the linkage of the grounding switch operating shaft to move the sliding vane up and down during operation, and the swing frame drives the telescopic piece to move horizontally to complete the locking or unlocking of the electric grounding knife. This method requires sufficient space to be reserved inside the switch cabinet, further compressing the already limited internal space of the switch cabinet, thereby affecting the practical effect of the equipment itself. Summary of the Utility Model

[0005] The purpose of this part is to outline some aspects of the embodiments of the present utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this part, as well as in the abstract and the name of the utility model of this application, to avoid obscuring the purpose of this part, the abstract of the specification, and the name of the utility model. However, such simplifications or omissions cannot be used to limit the scope of the present utility model.

[0006] To solve the problems raised in the above background technique, the present utility model adopts the following technical solutions.

[0007] A motorized grounding knife locking mechanism for a switch cabinet, comprising a mounting plate, a motorized grounding knife assembly, a circuit connection assembly, side plates, and a fitting. The motorized grounding knife assembly is fixedly mounted on the surface of the mounting plate, and one side of the surface of the mounting plate is fixedly mounted with the circuit connection assembly. The side plates are fixedly mounted on the side of the mounting plate, and the fitting is slidably mounted inside the side plates. A blocking mechanism is fixedly mounted on the upper surface of the mounting plate. The blocking mechanism includes a blocking component, a limiting groove, and a limiting rod. The limiting rods are symmetrically and fixedly mounted on the upper surface of the mounting plate. The blocking component is slidably mounted between the two limiting rods. Limiting grooves are symmetrically formed inside the blocking component, and the limiting rods are slidably connected with the limiting grooves.

[0008] As a preferred technical solution of the present invention, the blocking component includes a blocking rod and an insulating sleeve. The blocking rod is slidably mounted outside the limiting rod, and the insulating sleeves are equidistantly and fixedly mounted on the outer surface of the blocking rod.

[0009] As a preferred technical solution of the present invention, the blocking component further includes a linkage frame. The linkage frame is fixedly mounted on the side of the blocking rod, and the linkage frame is fixedly connected with the fitting.

[0010] As a preferred technical solution of the present invention, the fitting includes a shielding plate, an observation slot, a linkage slot, and a fitting component. An observation slot is formed inside the side plate. The shielding plate is slidably mounted inside the side plate. A linkage slot is formed on the side of the side plate. The linkage frame is slidably connected inside the linkage slot, and the linkage frame is fixedly connected with the shielding plate. A fitting component is arranged on the side of the shielding plate.

[0011] As a preferred technical solution of the present invention, the observation slot is integrally rectangular in shape. The observation slot penetrates through the side plate and is arranged on one side of the end of the motorized grounding knife assembly.

[0012] As a preferred technical solution of the present invention, the fitting component includes a pulling frame, a first magnet, and a second magnet. The pulling frame is fixedly mounted on the side of the shielding plate, the second magnet is fixedly mounted on the side of the side plate, and the first magnet is fixedly mounted on the upper surface of the pulling frame. The first magnet is magnetically connected with the second magnet.

[0013] As a preferred technical solution of the present invention, the second magnet is arranged directly above the pulling frame, and a handle groove is formed at the lower end of the pulling frame.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model provides a blocking mechanism and a matching piece, so that the opening and closing of the electric ground knife can be observed and blocked. When the staff needs to inspect the internal components of the switch cabinet, the staff can observe the angle and position of the electric ground knife assembly in real time by using the matching piece. In the process of moving the matching piece, the blocking rod can be driven to move synchronously, and the blocking rod can be moved to the moving trajectory of the electric ground knife to block the closing and opening of the ground knife. This changes the operating mode of disconnecting the circuit by moving the sliding piece linked to the operating shaft of the ground switch up and down inside the switch cabinet. Instead, the blocking assembly is installed between the electric ground knife assembly and the circuit connection assembly, which reasonably utilizes the space occupied by the existing electric ground knife closing structure itself inside the switch cabinet, ensuring that the electric ground knife is in a disconnected state when the internal components of the switch cabinet are receiving inspection. The utility model effectively saves the internal space of the switch cabinet while ensuring the safety of the equipment during operation, and has strong practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional diagram of the overall structure of the utility model.

[0017] Figure 2 It is a three-dimensional diagram of the structure after the electric floor knife assembly and the circuit connection assembly of the utility model are connected.

[0018] Figure 3 It is a three-dimensional diagram of the blocking mechanism structure of the utility model.

[0019] Figure 4 It is a structural schematic diagram of the blocking component in the utility model.

[0020] Figure 5 It is a structural schematic diagram of the matching parts in the utility model.

[0021] Figure 6 It is a structural schematic diagram of the matching components in the utility model.

[0022] The corresponding relationship between the illustrations and component names in the figure is as follows:

[0023] 1. Mounting plate; 2. Electric ground knife assembly; 3. Circuit connection assembly; 4. Side panel; 5. Matching piece; 51. Shielding plate; 52. Observation slot; 53. Linkage slot; 54. Matching assembly; 541. Pulling frame; 542. First magnet; 543. Second magnet; 6. Blocking mechanism; 61. Blocking assembly; 611. Blocking rod; 612. Insulating ferrule; 613. Linkage frame; 62. Limiting slot; 63. Limiting rod. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0025] In the following description, many specific details are set forth in order to provide a thorough understanding of the present utility model. However, the present utility model may also be implemented in other ways different from those described herein. Those skilled in the art may make similar extensions without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0026] Secondly, as used herein, "an embodiment" or "embodiment" refers to a specific feature, structure, or characteristic that may be included in at least one implementation manner of the present utility model. The phrase "in an embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor is it an individual or alternative embodiment that is mutually exclusive with other embodiments. The present utility model provides the following embodiments.

[0027] As shown by Figure 1 , Figure 2 and Figure 3 , a motorized grounding knife locking mechanism for a switch cabinet includes a mounting plate 1, a motorized grounding knife assembly 2, a circuit connection assembly 3, a side plate 4, and a fitting 5. The motorized grounding knife assembly 2 is fixedly installed on the surface of the mounting plate 1, the circuit connection assembly 3 is fixedly installed on the surface of the mounting plate 1, the side plate 4 is fixedly installed on the side of the mounting plate 1, the fitting 5 is slidably installed inside the side plate 4, a blocking mechanism 6 is fixedly installed on the upper surface of the mounting plate 1. The blocking mechanism 6 includes a blocking component 61, a limiting groove 62, and a limiting rod 63. The limiting rods 63 are symmetrically and fixedly installed on the upper surface of the mounting plate 1. The blocking component 61 is slidably installed between the two limiting rods 63. Limiting grooves 62 are symmetrically formed inside the blocking component 61, and the limiting rods 63 are slidably connected with the limiting grooves 62.

[0028] In use, the device is integrally installed inside the switchgear cabinet. Then, by using the electric knife-switch assembly 2 and the internal controller of the switchgear cabinet, the angle of the electric knife-switch assembly 2 itself is controlled, enabling the knife-switch part of the electric knife-switch assembly 2 to flexibly rotate into or out of the circuit connection assembly 3, thereby completing the control of the opening and closing of the knife-switch. When the staff needs to repair the internal components of the switchgear cabinet, by using the cooperating part 5, the blocking mechanism 6 is driven to work. As the cooperating part 5 moves, the blocking assembly 61 is driven to move up and down synchronously. When the cooperating part 5 moves under the pull of the staff, the blocking assembly 61 moves synchronously in the moving direction of the cooperating part 5 under the cooperation of the limiting groove 62 and the limiting rod 63. When the cooperating part 5 moves to the target position, the blocking assembly 61 will move to the upper end of the circuit connection assembly 3 and fit on the upper surface of the circuit connection assembly 3. At this time, the blocking assembly 61 is on the moving track when the electric knife-switch assembly 2 rotates. When the electric knife-switch assembly 2 is triggered, the knife-switch part of the electric knife-switch assembly 2 will rotate in a circular motion along the steering shaft of the electric knife-switch assembly 2 itself. At this time, the blocking assembly 61 is on the moving track of the knife-switch assembly, hindering the rotation of the knife-switch. The knife-switch cannot enter the circuit connection assembly 3 to complete the closing operation, preventing the electric knife-switch assembly 2 from automatically closing the circuit due to a malfunction. Moreover, during use, there is no need to change or adjust the positions of components such as the electric knife-switch. Instead, a blocking mechanism 6 that can slide up and down is installed on the side of the circuit connection assembly 3, and the entire blocking mechanism 6 is installed between the electric knife-switch assembly 2 and the circuit connection assembly 3, without occupying additional space inside the switchgear cabinet, reducing the space occupancy rate during device use, thereby ensuring the stability and safety during equipment operation and maintenance.

[0029] As shown in the attached Figure 4 In this embodiment, as shown, the blocking assembly 61 includes a blocking rod 611 and an insulating sleeve 612. The blocking rod 611 is slidably installed outside the limiting rod 63, and the insulating sleeves 612 are equidistantly and fixedly installed on the outer surface of the blocking rod 611. During use, by using the blocking rod 611, the blocking rod 611 slides up and down along the outer surface of the limiting rod 63, and subsequently, it can block the knife-switch part of the electric knife-switch assembly 2, preventing the electric knife-switch assembly 2 from automatically rotating into the circuit connection assembly 3 to complete the closing of the circuit. Moreover, due to the setting and use of the insulating sleeves 612, the insulation effect of the blocking rod 611 itself is enhanced, ensuring the stability and safety during equipment operation.

[0030] As shown in the attached Figure 5 In this embodiment, as shown, the blocking assembly 61 further includes a linkage bracket 613. The linkage bracket 613 is fixedly installed on the side of the blocking rod 611, and the linkage bracket 613 is fixedly connected to the cooperating part 5. During use, by installing the linkage bracket 613, it is convenient for the blocking rod 611 to move up and down synchronously with the cooperating part 5 under the cooperation and linkage of the linkage bracket 613.

[0031] As shown in the appended Figure 5 In this embodiment, the fitting member 5 includes a shielding plate 51, an observation slot 52, a linkage slot 53, and a fitting assembly 54. An observation slot 52 is provided inside the side plate 4. The shielding plate 51 is slidably installed inside the side plate 4. A linkage slot 53 is provided on the side of the side plate 4. The linkage frame 613 is slidably connected in the linkage slot 53. The linkage frame 613 is fixedly connected to the shielding plate 51. A fitting assembly 54 is provided on the side of the shielding plate 51. During use, through the use of the fitting assembly 54, the position of the shielding plate 51 itself is fixed to prevent the shielding plate 51 from automatically moving downward under the drive of the blocking mechanism 6 and gravity. When it is necessary to check the opening and closing condition of the electric knife switch, by pulling the shielding plate 51, the shielding plate 51 slides along the inner slot of the side plate 4. Through the cooperation of the linkage slot 53 and the linkage frame 613, the shielding plate 51 can drive the blocking assembly 61 to move up and down synchronously. Once the shielding plate 51 slides downward, the blocking assembly 61 stably moves to the upper surface of the circuit connection assembly 3 and is in the rotation trajectory of the electric knife assembly 2 to block the operation of the electric knife assembly 2 itself and prevent the subsequent automatic closing of the electric knife assembly 2 due to a malfunction.

[0032] As shown in the appended Figure 5 In this embodiment, the observation slot 52 is generally rectangular in shape. The observation slot 52 penetrates the side plate 4 and is provided on one side of the end of the electric knife assembly 2. During use, through the provision of the observation slot 52, the staff can observe the electric knife assembly 2 through the observation slot 52. A calibration block is installed on the side of the electric knife assembly 2. By observing the position and angle of the calibration block on the side of the electric knife assembly 2, the position of the knife switch inside the electric knife assembly 2 can be quickly identified.

[0033] As shown in the appended Figure 6 In this embodiment, the fitting assembly 54 includes a pulling frame 541, a first magnet 542, and a second magnet 543. The pulling frame 541 is fixedly installed on the side of the shielding plate 51. The second magnet 543 is fixedly installed on the side of the side plate 4. The first magnet 542 is fixedly installed on the upper surface of the pulling frame 541. The first magnet 542 is magnetically connected to the second magnet 543. During use, through the use of the pulling frame 541, the position of the shielding plate 51 itself can be quickly adjusted and changed. With the cooperation of the first magnet 542 and the second magnet 543, by utilizing the magnetism generated by both of them, the first magnet 542 and the second magnet 543 are adsorbed to each other to complete the locking of the position of the shielding plate 51 itself.

[0034] As shown in the appended Figure 6As shown, in this embodiment, the second magnet 543 is disposed directly above the pulling frame 541, and a handle groove is formed at the lower end of the pulling frame 541. During use, the formation of the handle groove in the pulling frame 541 facilitates the fitting of the staff's hand to the inner wall of the pulling frame 541, making it more convenient for subsequent adjustment of the position of the shielding plate 51 itself. Moreover, the setting of the position of the second magnet 543 enables more accurate adsorption between the first magnet 542 and the second magnet 543.

[0035] The above content further elaborates on the present utility model in conjunction with specific implementation manners. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model pertains, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, which should all be regarded as falling within the protection scope determined by the claims submitted for the present utility model.

Claims

1. A motorized grounding knife locking mechanism for a switch cabinet, comprising a mounting plate (1), a motorized grounding knife assembly (2), a circuit connection assembly (3), a side plate (4) and a fitting (5). The motorized grounding knife assembly (2) is fixedly installed on the surface of the mounting plate (1), and the circuit connection assembly (3) is fixedly installed on one side of the surface of the mounting plate (1). The side plate (4) is fixedly installed on the side of the mounting plate (1), and the fitting (5) is slidably installed inside the side plate (4), characterized in that: On the upper surface of the mounting plate (1), a blocking mechanism (6) is fixedly installed. The blocking mechanism (6) includes a blocking component (61), a limiting groove (62), and a limiting rod (63). The limiting rods (63) are symmetrically and fixedly installed on the upper surface of the mounting plate (1). The blocking component (61) is slidably installed between the two limiting rods (63). Limiting grooves (62) are symmetrically formed inside the blocking component (61), and the limiting rods (63) are slidably connected to the limiting grooves (62).

2. The electric grounding knife interlocking mechanism for switchgear according to claim 1, wherein: The blocking component (61) includes a blocking rod (611) and an insulating sleeve (612). The blocking rod (611) is slidably installed outside the limiting rod (63), and the insulating sleeves (612) are equidistantly and fixedly installed on the outer surface of the blocking rod (611).

3. The electric knife locking mechanism for switchgear according to claim 1, characterized in that: The blocking component (61) further includes a linkage frame (613). The linkage frame (613) is fixedly installed on the side of the blocking rod (611), and the linkage frame (613) is fixedly connected to the fitting (5).

4. The motorized grounding switch interlocking mechanism of the switch cabinet according to claim 3, wherein: The fitting (5) includes a shielding plate (51), an observation groove (52), a linkage groove (53), and a fitting component (54). An observation groove (52) is formed inside the side plate (4). The shielding plate (51) is slidably installed inside the side plate (4). A linkage groove (53) is formed on the side of the side plate (4). The linkage frame (613) is slidably connected inside the linkage groove (53), and the linkage frame (613) is fixedly connected to the shielding plate (51). A fitting component (54) is arranged on the side of the shielding plate (51).

5. The electric knife blocking mechanism for switchgear according to claim 4, characterized in that: The overall shape of the observation groove (52) is rectangular. The observation groove (52) penetrates the side plate (4) and is arranged on one side of the end of the electric grounding knife assembly (2).

6. The electric knife blocking mechanism for switchgear according to claim 5, characterized in that: The fitting component (54) includes a pulling frame (541), a first magnet (542), and a second magnet (543). The pulling frame (541) is fixedly installed on the side of the shielding plate (51). The second magnet (543) is fixedly installed on the side of the side plate (4). The first magnet (542) is fixedly installed on the upper surface of the pulling frame (541), and the first magnet (542) is magnetically connected to the second magnet (543).

7. The electric grounding knife locking mechanism of the switch cabinet according to claim 6, characterized in that: The second magnet (543) is arranged directly above the pulling frame (541), and a handle groove is formed at the lower end of the pulling frame (541).

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