A high-voltage switch cabinet internal contact protection isolation assembly

Abstract

The utility model is suitable for high -voltage switch cabinet technical field provides a high -voltage switch cabinet internal contact protection isolation subassembly, including hinged frame, the hinged frame is installed with upper baffle and lower baffle, the same locking device is installed to the front of upper baffle and lower baffle, the locking device is equipped with limit device in card, the locking device includes hook and clamping plate. In the utility model, when carrying out high -voltage switch cabinet overhaul, the operator pulls hook outward, and hook drives the synchronous movement of the pull rod on the frame body, and simultaneously makes the sliding rod slide along the movable rod inner chamber, in this process, the sliding rod can rotate freely around the fixed shaft, when hook displacement reaches above clamping plate, unhook, and the restoring force of back -and -forth spring drives the reset of pull rod and sliding rod, and the sliding of sliding rod in movable rod cooperates the elastic action of back -and -forth spring, makes hook reliably clamping in clamping plate, thereby realizes the mechanical limit of upper and lower baffle, effectively prevents the security risk of baffle separation due to misoperation.

Description

Technical Field

[0001] This utility model belongs to the field of high voltage switchgear technology, and in particular relates to an internal contact protection and isolation component for high voltage switchgear. Background Technology

[0002] High-voltage switchgear is a complete set of electrical equipment used in power systems to receive, distribute, and control electrical energy. It is mainly used in power distribution systems in substations, industrial and mining enterprises, and large buildings. Its core functions include circuit switching, load control, and fault protection such as short circuits and overloads. It is usually composed of components such as circuit breakers, disconnecting switches, instrument transformers, protection devices, and instruments. It has good insulation, mechanical strength, and reliability. High-voltage switchgear can be divided into fixed type and handcart type according to its structure, and into air-insulated and SF6 gas-insulated types according to its insulation medium. It is widely applicable to voltage levels of 3.6kV to 40.5kV and is a key piece of equipment in the power transmission and distribution process to ensure the safe and stable operation of the system.

[0003] In existing technologies, high-voltage switchgear typically employs a valve mechanism to ensure operational safety. However, during maintenance, if the hinged frame of the valve mechanism is subjected to improper external force, the upper baffle may accidentally detach from the lower baffle, leading to mechanical separation or protection failure, posing a potential safety risk. This structural defect may affect the reliability of the equipment and the safety of maintenance personnel, requiring further design optimization to improve stability. Utility Model Content

[0004] This utility model provides an internal contact protection and isolation component for high-voltage switchgear, aiming to solve the problem that in the prior art, high-voltage switchgear usually uses a valve mechanism to ensure operational safety. However, during maintenance, if the hinge frame of the valve mechanism is subjected to improper external force, the upper baffle and the lower baffle may accidentally separate, leading to mechanical separation or protection failure, which poses a potential safety risk. This structural defect may affect the reliability of the equipment and the safety of maintenance personnel, and further design optimization is needed to improve stability.

[0005] This utility model is implemented as follows: a contact protection and isolation component inside a high-voltage switchgear includes: a hinge frame, an upper baffle and a lower baffle installed inside the hinge frame, the same locking device installed on the front of the upper baffle and the lower baffle, and a limiting device being engaged inside the locking device; The locking device includes a hook and a locking plate. The locking plate is fixedly connected to the front of the upper baffle, and the hook is locked inside the locking plate. Both limit the upper baffle and the lower baffle respectively.

[0006] Preferably, the locking device further includes a mounting plate, which is fixedly connected to the front of the lower baffle. Two connecting blocks are fixedly connected to the front of the mounting plate. The same fixed shaft is installed in the two connecting blocks. A movable rod is rotatably connected to the fixed shaft. A sliding rod is provided in the movable rod. A pull rod is fixedly connected to one end of the sliding rod. A pin is provided in the pull rod. A frame is hinged to the pin. The frame is sleeved on the pull rod. A hook is fixedly connected to the outside of the frame.

[0007] Preferably, the movable rod has a sliding groove, and the sliding rod and the sliding groove form a sliding connection.

[0008] Preferably, the slide bar is fitted with a pull spring, one end of which is fixedly connected to the bottom of the pull rod, and the other end of which is fixedly connected to the movable rod.

[0009] Preferably, the limiting device includes a housing and a limiting hole. The housing is fixedly connected to the front of the lower baffle. A circular hole is provided inside the housing. A limiting rod is provided inside the circular hole. A circular plate is fixedly connected to the front of the limiting rod. A return spring is sleeved on the limiting rod.

[0010] Preferably, the mounting plate is fitted inside the housing, and the limiting hole is formed inside the mounting plate.

[0011] Preferably, one end of the return spring is fixedly connected to the outside of the circular plate, and the other end of the return spring is fixedly connected to the outside of the housing.

[0012] Preferably, the diameter of the cross-section of the limiting rod is slightly smaller than the inner diameter of the limiting hole, and the limiting rod is engaged within the limiting hole.

[0013] Compared with related technologies, the contact protection and isolation component inside a high-voltage switchgear provided by this utility model has the following beneficial effects: 1. In this utility model, when performing maintenance on a high-voltage switchgear, the operator pulls the hook outward, causing the hook to move synchronously with the pull rod on the frame, and simultaneously causing the slide rod to slide along the inner cavity of the movable rod. During this process, the slide rod can rotate freely around the fixed axis. When the hook is displaced above the clamping plate, the hook is released, and the restoring force generated by the return spring drives the pull rod and slide rod to reset. The sliding of the slide rod in the movable rod, combined with the elastic action of the return spring, reliably engages the hook in the clamping plate, thereby achieving mechanical limiting of the upper and lower baffles and effectively preventing the safety hazard of baffle separation due to misoperation.

[0014] 2. In this utility model, after the maintenance work is completed, the operator pulls the circular plate outward, and the circular plate drives the limiting rod to slide along the axial direction of the circular hole. When the limiting rod is completely disengaged from the limiting hole, the mounting plate can be removed from the housing to achieve quick disassembly. This design avoids interference of the contact connection by the extra structure during normal operation of the equipment, and ensures the reliability of electrical contact. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the locking device of this utility model; Figure 3 This is a three-dimensional cross-sectional structural diagram of the movable rod of this utility model; Figure 4 This is a schematic diagram of the structure of the present invention with the shell and mounting plate separated.

[0016] Reference numerals: 1. Hinge frame; 2. Upper baffle; 3. Lower baffle; 4. Locking device; 401. Mounting plate; 402. Connecting block; 403. Fixed shaft; 404. Movable rod; 405. Slide rod; 406. Pull rod; 407. Pin; 408. Frame; 409. Hook; 410. Clamping plate; 411. Return spring; 5. Limiting device; 51. Housing; 52. Round hole; 53. Limiting hole; 54. Limiting rod; 55. Round plate; 56. Return spring. Detailed Implementation

[0017] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0018] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0019] This utility model embodiment provides a contact protection and isolation component for the internal contacts of a high-voltage switchgear, such as... Figure 1-4As shown, it includes: a hinge frame 1, an upper baffle 2 and a lower baffle 3 installed inside the hinge frame 1, the same locking device 4 installed on the front of the upper baffle 2 and the lower baffle 3, and a limiting device 5 locked inside the locking device 4; The locking device 4 includes a hook 409 and a locking plate 410. The locking plate 410 is fixedly connected to the front of the upper baffle 2, and the hook 409 is locked inside the locking plate 410. Both limit the upper baffle 2 and the lower baffle 3 respectively.

[0020] In a further preferred embodiment of this utility model, the locking device 4 further includes a mounting plate 401, which is fixedly connected to the front of the lower baffle 3. Two connecting blocks 402 are fixedly connected to the front of the mounting plate 401. The same fixed shaft 403 is installed in the two connecting blocks 402. A movable rod 404 is rotatably connected to the fixed shaft 403. A sliding rod 405 is provided in the movable rod 404. A pull rod 406 is fixedly connected to one end of the sliding rod 405. A pin 407 is provided in the pull rod 406. A frame 408 is hinged to the pin 407. The frame 408 is sleeved on the outside of the pull rod 406. A hook 409 is fixedly connected to the outside of the frame 408. A sliding groove is opened in the movable rod 404, and a sliding connection is formed between the sliding rod 405 and the sliding groove.

[0021] In this embodiment, the slide bar 405 slides within the groove of the movable rod 404. This engagement ensures the linear motion accuracy of the hook 409 during the pulling process, preventing offset or jamming. The guide effect of the groove on the slide bar 405 makes the movement of the pull rod 406 more stable. At the same time, the restoring force of the return spring 411 is evenly transmitted through the slide bar 405, ensuring that the hook 409 can accurately engage with the locking plate 410, thus improving the reliability of the locking device 4. The slide bar 405 is fitted with a return spring 411. One end of the return spring 411 is fixedly connected to the lower part of the pull rod 406, and the other end is fixedly connected to the movable rod 404. The return spring 411 is sleeved on the outside of the slide bar 405, with one end fixed to the pull rod 406 and the other end fixed to the movable rod 404. This layout makes full use of the axial guiding effect of the slide bar 405, ensuring that the extension and contraction of the spring always proceed in a straight line, avoiding spring twisting or failure caused by uneven load. At the same time, the compact structural design saves space and enhances the response speed of the overall mechanism.

[0022] In a further preferred embodiment of this utility model, the limiting device 5 includes a housing 51 and a limiting hole 53. The housing 51 is fixedly connected to the front of the lower baffle 3. A circular hole 52 is provided inside the housing 51. A limiting rod 54 is provided inside the circular hole 52. A circular plate 55 is fixedly connected to the front of the limiting rod 54. A return spring 56 is provided on the outer sleeve of the limiting rod 54. A mounting plate 401 is snapped into the housing 51. The limiting hole 53 is opened in the mounting plate 401. One end of the return spring 56 is fixedly connected to the outside of the circular plate 55, and the other end of the return spring 56 is fixedly connected to the outside of the housing 51. The diameter of the cross-section of the limiting rod 54 is slightly smaller than the inner diameter of the limiting hole 53, and the limiting rod 54 is snapped into the limiting hole 53.

[0023] In this embodiment, the return spring 56 is sleeved on the outside of the limiting rod 54, with one end fixed to the circular plate 55 and the other end abutting against the outer wall of the housing 51. This design utilizes the axial elastic force of the return spring 56 to ensure that the limiting rod 54 always tends to return to the limiting hole 53 when not in operation. When the circular plate 55 is pulled, the return spring 56 is compressed and stores energy; after being released, the return spring 56 releases energy to push the limiting rod 54 back to its precise position and into the limiting hole 53. The linear extension and contraction characteristics of the return spring 56 combined with the rigid guidance of the limiting rod 54 not only avoids skewing during the reset process, but also improves the response speed and positioning reliability of the operation, while reducing the impact wear on the inner wall of the housing 51.

[0024] In summary, when performing maintenance on the high-voltage switchgear, the operator pulls the hook 409 outward. The hook 409 drives the pull rod 406 on the frame 408 to move synchronously, while the slide rod 405 slides along the inner cavity of the movable rod 404. During this process, the slide rod 405 can rotate freely around the fixed shaft 403. When the hook 409 moves above the clamping plate 410, the hook 409 is released, and the restoring force generated by the return spring 411 drives the pull rod 406 and the slide rod 405 to reset. The slide rod 405 slides within the movable rod 404. The elastic action of the pull-back spring 411 ensures that the hook 409 is reliably engaged in the clamping plate 410, thereby achieving mechanical limiting of the upper and lower baffles 3 and effectively preventing the safety hazard of baffle separation due to misoperation. After the maintenance work is completed, the operator pulls the circular plate 55 outward, and the circular plate 55 drives the limiting rod 54 to slide axially along the circular hole 52. When the limiting rod 54 is completely disengaged from the limiting hole 53, the mounting plate 401 can be removed from the housing 51 to achieve quick disassembly. This completes the protection during the maintenance of the high-voltage switchgear.

[0025] It is worth noting that the circuits, electronic components, and modules involved in this utility model are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this utility model does not involve any improvement to the software and methods.

[0026] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0027] The above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit the scope of protection of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Although this utility model has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of this utility model according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of this utility model. These technical solutions are also within the scope of protection of this utility model.

Claims

1. A contact protection and isolation assembly for internal contacts of a high-voltage switchgear, comprising a hinged frame (1), characterized in that, The hinge frame (1) is equipped with an upper baffle (2) and a lower baffle (3). The upper baffle (2) and the lower baffle (3) are equipped with the same locking device (4) on their front sides. The locking device (4) is equipped with a limiting device (5). The locking device (4) includes a hook (409) and a locking plate (410). The locking plate (410) is fixedly connected to the front of the upper baffle (2). The hook (409) is locked inside the locking plate (410), and both limit the upper baffle (2) and the lower baffle (3) respectively.

2. The internal contact protection and isolation assembly of a high-voltage switchgear according to claim 1, characterized in that, The locking device (4) further includes a mounting plate (401), which is fixedly connected to the front of the lower baffle (3). Two connecting blocks (402) are fixedly connected to the front of the mounting plate (401). The same fixed shaft (403) is installed in the two connecting blocks (402). A movable rod (404) is rotatably connected to the outside of the fixed shaft (403). A sliding rod (405) is provided in the movable rod (404). A pull rod (406) is fixedly connected to one end of the sliding rod (405). A pin (407) is provided in the pull rod (406). A frame (408) is hinged to the outside of the pin (407). The frame (408) is sleeved on the outside of the pull rod (406). A hook (409) is fixedly connected to the outside of the frame (408).

3. The internal contact protection and isolation assembly of a high-voltage switchgear according to claim 2, characterized in that, The movable rod (404) has a sliding groove, and the sliding rod (405) and the sliding groove form a sliding connection.

4. The internal contact protection and isolation assembly of a high-voltage switchgear according to claim 2, characterized in that, The slide bar (405) is fitted with a pull spring (411), one end of which is fixedly connected to the pull rod (406), and the other end of which is fixedly connected to the movable rod (404).

5. The internal contact protection and isolation assembly of a high-voltage switchgear according to claim 2, characterized in that, The limiting device (5) includes a housing (51) and a limiting hole (53). The housing (51) is fixedly connected to the front of the lower baffle (3). A circular hole (52) is provided in the housing (51). A limiting rod (54) is provided in the circular hole (52). A circular plate (55) is fixedly connected to the front of the limiting rod (54). A return spring (56) is provided on the outer sleeve of the limiting rod (54).

6. The internal contact protection and isolation assembly of a high-voltage switchgear according to claim 5, characterized in that, The mounting plate (401) is fitted inside the housing (51), and the limiting hole (53) is opened inside the mounting plate (401).

7. The internal contact protection and isolation assembly of a high-voltage switchgear according to claim 5, characterized in that, One end of the reset spring (56) is fixedly connected to the outside of the circular plate (55), and the other end of the reset spring (56) is fixedly connected to the outside of the housing (51).

8. The internal contact protection and isolation assembly of a high-voltage switchgear according to claim 5, characterized in that, The diameter of the cross-section of the limiting rod (54) is slightly smaller than the inner diameter of the limiting hole (53), and the limiting rod (54) is locked inside the limiting hole (53).

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