A high-voltage cabinet safety protection interlocking mechanism

Abstract

The utility model discloses a high -voltage cabinet safety protection interlock mechanism, the utility model relates to high -voltage cabinet technical field. Including high -voltage cabinet main part, be provided with for high -voltage cabinet safety protection construction's interlock mechanism on high -voltage cabinet main part, interlock machine machine includes, the utility model spring telescopic link is connected with fixed block and lock bar through the rotation axis of both ends respectively, and its elastic force continuously pulls lock bar, ensures that lock bar is stably engaged in lock groove, when needing to open the cabinet door, through the key reverse rotation lock catch, overcome the elastic force of spring telescopic link, drive lock bar to separate from lock groove, can open cabinet door main body, and the elastic reset action of spring telescopic link avoids the accidental drop of lock bar, ensures that the cabinet door always keeps locking under the non -operating state, improves the basic security of high -voltage cabinet, and the continuous tension of it makes lock bar and lock groove keep close engagement, increases the difficulty of accidental opening, improves the stability and security of lockset.

Description

Technical Field

[0001] This utility model relates to the field of high-voltage switchgear technology, specifically a high-voltage switchgear safety protection interlocking mechanism. Background Technology

[0002] High-voltage switchgear, as a crucial piece of equipment in the power system, is widely used in power plants, substations, industrial plants, and other locations. It undertakes critical tasks such as power distribution, control, and protection. The stability and safety of its operation directly affect the reliable operation of the entire power system. If a high-voltage switchgear malfunctions or experiences a safety accident, it can not only lead to localized power outages, disrupting normal production and daily life, but also potentially trigger fires, explosions, and other serious consequences, causing enormous casualties and property damage. Therefore, ensuring the safe operation of high-voltage switchgear is one of the core aspects of power system management.

[0003] Current high-voltage switchgear is generally equipped with mechanical door locks. The lock is operated by a key, which engages the locking rod and lock slot to open and close the switchgear door. However, this basic mechanical locking method has significant safety hazards. In actual operation and maintenance, it relies on the operator's self-discipline and awareness of procedures, and there is a risk of improper operation. That is, the operator may not first turn off the power switch at the front end of the high-voltage switchgear, and directly use the key to open the switchgear door for maintenance while the wiring inside the switchgear is still energized. This behavior is extremely dangerous and can easily cause serious electric shock accidents, posing a huge threat to the life safety of the operator. Therefore, this utility model provides a high-voltage switchgear safety protection interlocking mechanism. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a safety interlocking mechanism for high-voltage switchgear. This mechanism solves the problem that, during actual operation and maintenance, reliance on the operator's self-discipline and awareness of procedures can lead to the risk of unauthorized operations. Specifically, operators may not first disconnect the power switch at the front end of the high-voltage switchgear and directly use a key to open the cabinet door for maintenance while the internal wiring is still energized. This behavior is extremely dangerous and can easily cause serious electric shock accidents, posing a significant threat to the life safety of operators.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a high-voltage switchgear safety protection interlocking mechanism, comprising a high-voltage switchgear body, wherein the high-voltage switchgear body is provided with an interlocking mechanism for the high-voltage switchgear safety protection mechanism, the interlocking mechanism comprising: The locking assembly includes a cabinet door body located at the front end of the high-voltage switchgear body. The cabinet door body has a latch inside, a locking rod on the latch, and an elastic component for resetting at the lower end of the locking rod. The locking assembly includes a locking rod fixed to one side of the latch, a first slot being provided inside the locking rod, a slide rod connected by a gear assembly being provided on the inner wall of the cabinet body, a locking rod being fixed at the upper end of the slide rod, a locking block being fixed on the inner wall of the high-voltage cabinet body, a second slot being provided inside the locking block, and a locking bolt being inserted into the second slot.

[0006] Preferably, the inner wall of the high-voltage cabinet body is fixed with a locking groove, and one end of the locking rod is engaged with the locking groove.

[0007] Preferably, the elastic component includes a fixing block fixed to the inner wall of the cabinet door body, and a spring telescopic rod rotatably connected to the upper end of the fixing block via a rotating shaft. The other end of the spring telescopic rod is rotatably connected to the locking rod via the rotating shaft.

[0008] Preferably, the gear assembly includes an electric switch installed inside the cabinet door body, a gear on the outer wall of the electric switch, a fixing plate fixed to the inner wall of the cabinet door body, a limit rod fixed to the inner wall of the fixing plate, a sliding rod slidably connected to the outer wall of the limit rod, and a rack fixed to one side wall of the sliding rod, the rack meshing with the gear.

[0009] Preferably, the engaging rod is engaged with the first slot, one end of the locking bolt is fixed with a connecting block, and the connecting block is fixedly connected to the slide rod.

[0010] Preferably, a guide rod is slidably connected inside the connecting block, and a cross block is fixed at one end of the guide rod.

[0011] Beneficial effects This utility model provides a safety protection interlocking mechanism for high-voltage switchgear. Compared with the prior art, it has the following advantages: Firstly, the spring telescopic rod of this utility model is connected to the fixed block and the locking rod respectively through the rotating shafts at both ends. Its elastic force continuously pulls the locking rod, ensuring that the locking rod is stably engaged in the lock groove. When it is necessary to open the cabinet door, the lock is rotated in the opposite direction by the key to overcome the elastic force of the spring telescopic rod and drive the locking rod to disengage from the lock groove, thereby opening the cabinet door. The elastic reset function of the spring telescopic rod prevents the locking rod from accidentally falling off, ensuring that the cabinet door remains locked when not in operation, thus improving the basic safety of the high-voltage cabinet. Its continuous pulling force keeps the locking rod and the lock groove tightly engaged, increasing the difficulty of accidental opening and improving the stability and safety of the lock.

[0012] Secondly, when the high-voltage switchgear is energized, the circuit breaker is in the closed position, and the gear on its outer wall meshes with the rack on one side of the slide rod. At this time, the slide rod is in a specific position under the guidance of the limit rod, and the locking rod at its upper end engages in the first slot of the locking rod. Simultaneously, the slide rod drives the locking bolt to insert into the second slot of the locking block through the connecting block, thus doubly locking the cabinet door body. Even if the lock is turned with a key, the cabinet door cannot be opened. When it is necessary to inspect the internal wiring of the high-voltage switchgear, the circuit breaker must be turned to disconnect the power first. At this time, the gear rotates with the circuit breaker, driving the rack and slide rod to slide along the limit rod. When the slide rod slides... The locking lever disengages from the first locking slot, and simultaneously the connecting block causes the locking bolt to disengage from the second locking slot, thus releasing the double locking. At this point, the cabinet door can only be opened by rotating the lock with the key. This solves the problem of electric shock hazards caused by unauthorized operators opening the cabinet door directly with the key to inspect the internal electrical circuits of the high-voltage cabinet without turning off the power switch. The gear assembly links the state of the power switch with the locking state of the cabinet door. Only by turning off the power switch and releasing the locking assembly from the cabinet door can the cabinet door be opened for inspection, effectively ensuring the safety of maintenance personnel and improving the safety of high-voltage cabinet operation. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the internal structure of the cabinet door body of this utility model; Figure 3 This is a schematic diagram of the locking rod structure of this utility model; Figure 4 This is a schematic diagram of the locking rod structure of this utility model.

[0014] In the diagram: 1. High-voltage switchgear body; 2. Cabinet door body; 201. Lock; 202. Locking rod; 203. Lock groove; 3. Fixing block; 301. Spring telescopic rod; 4. Locking rod; 401. First slot; 5. Fixing plate; 501. Limiting rod; 502. Sliding rod; 503. Engaging rod; 6. Power switch; 601. Gear body; 602. Rack; 7. Locking block; 701. Second slot; 702. Locking bolt; 703. Connecting block; 704. Horizontal block; 705. Guide rod. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] Please see Figures 1-4 This utility model provides a technical solution: a high-voltage switchgear safety protection interlocking mechanism, including a high-voltage switchgear body 1, on which an interlocking mechanism for the high-voltage switchgear safety protection mechanism is provided, the interlocking mechanism including: The locking assembly includes a cabinet door body 2 located at the front end of the high-voltage cabinet body 1. A latch 201 is provided inside the cabinet door body 2. A locking rod 202 is provided on the latch 201. An elastic component for resetting is provided at the lower end of the locking rod 202. The locking assembly includes a locking rod 4 fixed to one side of the latch 201, a first slot 401 inside the locking rod 4, a slide rod 502 connected by a gear assembly on the inner wall of the cabinet body 2, a locking rod 503 fixed at the upper end of the slide rod 502, a locking block 7 fixed on the inner wall of the high voltage cabinet body 1, a second slot 701 inside the locking block 7, and a locking bolt 702 inserted into the second slot 701.

[0017] In a preferred embodiment, a lock groove 203 is fixed to the inner wall of the high-voltage cabinet body 1. One end of the lock rod 202 is engaged with the lock groove 203. The elastic component includes a fixing block 3 fixed to the inner wall of the cabinet body 2. A spring telescopic rod 301 is provided on the upper end surface of the fixing block 3 and is rotatably connected to the spring telescopic rod 301 via a rotating shaft. The other end of the spring telescopic rod 301 is rotatably connected to the lock rod 202 via a rotating shaft. The lock 202 can be rotated by rotating the lock buckle 201 with a key, thereby engaging the lock rod 202 with the lock groove 203 and realizing the mechanized opening and closing of the cabinet body 2. At the same time, the spring telescopic rod 301 pulls the lock rod 202 to engage inside the lock groove 203, preventing accidental dislodgement.

[0018] In a preferred embodiment, the gear assembly includes an electric switch 6 disposed inside the cabinet door body 2, a gear 601 disposed on the outer wall of the electric switch 6, a fixing plate 5 fixed to the inner wall of the cabinet door body 2, a limit rod 501 fixed to the inner wall of the fixing plate 5, a sliding rod 502 slidably connected to the outer wall of the limit rod 501, a rack 602 fixed to one side wall of the sliding rod 502, the rack 602 meshing with the gear body 601, a locking rod 503 engaging with the first locking groove 401, a connecting block 703 fixed to one end of the locking bolt 702, the connecting block 703 being fixedly connected to the sliding rod 502, and the connecting block 703 being fixed to the connecting bolt 702. The internal sliding connection of 03 has a guide rod 705, and a horizontal block 704 is fixed to one end of the guide rod 705. The horizontal block 704 is fixedly connected to the cabinet door body 2. When it is necessary to inspect the wiring inside the high-voltage cabinet, the power switch 6 is turned, which drives the gear body 601 to rotate. This solves the problem of preventing unauthorized operators from not turning off the power switch 6 and directly using the key to open the lock 201, and then opening the cabinet door body 2 to inspect the wiring inside the high-voltage cabinet. At this time, the wiring inside the high-voltage cabinet is still energized, which is extremely dangerous and poses a risk of electric shock.

[0019] Specifically, when the high-voltage switchgear is energized, the switch 6 is in the closed position, and the gear 601 on its outer wall meshes with the rack 602 on one side of the slide rod 502. At this time, the slide rod 502 is in a specific position under the guidance of the limit rod 501, and the locking rod 503 at its upper end is engaged in the first slot 401 of the locking rod 4. At the same time, the slide rod 502 drives the locking bolt 702 to be inserted into the second slot 701 of the locking block 7 through the connecting block 703, thus doubly locking the cabinet door body 2. Even if the lock buckle 201 is rotated by the key, the cabinet door cannot be opened.

[0020] When it is necessary to inspect the internal wiring of the high-voltage cabinet, the power switch 6 must be turned first to disconnect the power. At this time, the gear 601 rotates with the power switch 6, driving the rack 602 and the slide rod 502 to slide along the limit rod 501. When the slide rod 502 slides, the locking rod 503 disengages from the first slot 401, and at the same time, the connecting block 703 drives the locking bolt 702 to disengage from the second slot 701, thus releasing the double lock. At this time, the cabinet door body 2 can be opened by rotating the lock buckle 201 with the key.

[0021] The guide rod 705 inside the connecting block 703 cooperates with the cross block 704 to ensure the stability of the sliding process of the slide rod 502 and avoid jamming.

[0022] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

[0023] When the high-voltage cabinet is powered on, the switch 6 is in the closed position. The gear 601 on its outer wall meshes with the rack 602 on one side of the slide rod 502. At this time, the slide rod 502 is in a specific position under the guidance of the limit rod 501. The locking rod 503 at its upper end is engaged in the first slot 401 of the locking rod 4. At the same time, the slide rod 502 drives the locking bolt 702 to be inserted into the second slot 701 of the locking block 7 through the connecting block 703, forming a double lock to fix the cabinet door body 2. Even if the lock buckle 201 is rotated by the key, the cabinet door cannot be opened. When it is necessary to inspect the internal wiring of the high-voltage cabinet, the power switch 6 must be turned first to disconnect the power. At this time, the gear 601 rotates with the power switch 6, driving the rack 602 and the slide rod 502 to slide along the limit rod 501. During the sliding of the slide rod 502, the locking rod 503 disengages from the first slot 401, and at the same time, the connecting block 703 drives the locking bolt 702 to disengage from the second slot 701, thus releasing the double lock. At this time, by rotating the lock buckle 201 with the key, the lock buckle 201 drives the locking rod 202 to rotate, overcoming the elasticity of the spring telescopic rod 301 and causing the locking rod 202 to disengage from the lock groove 203, so that the cabinet door body 2 can be opened. When closing the cabinet door, the lock buckle 201 is rotated in the opposite direction to drive the locking rod 202 to rotate, so that the locking rod 202 is locked into the lock groove 203. The spring telescopic rod 301 then pulls the locking rod 202 to maintain the locked state and prevent accidental disengagement.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A safety interlocking mechanism for a high-voltage switchgear, comprising a high-voltage switchgear body (1), characterized in that: The high-voltage switchgear body (1) is provided with an interlocking mechanism for the safety protection structure of the high-voltage switchgear, the interlocking mechanism including: The locking assembly includes a cabinet door body (2) located at the front end of the high voltage cabinet body (1), a latch (201) is provided inside the cabinet door body (2), a locking rod (202) is provided on the latch (201), and an elastic component for resetting is provided at the lower end of the locking rod (202). The locking assembly includes a locking rod (4) fixed on one side of the latch (201), the locking rod (4) having a first slot (401) inside, the inner wall of the cabinet body (2) having a slide rod (502) connected by a gear assembly, the upper end of the slide rod (502) having a locking rod (503) fixed, the inner wall of the high voltage cabinet body (1) having a locking block (7), the inner wall of the locking block (7) having a second slot (701) inside, and a locking bolt (702) inserted into the second slot (701).

2. The high-voltage switchgear safety protection interlocking mechanism according to claim 1, characterized in that: The inner wall of the high-voltage cabinet body (1) is fixed with a lock groove (203), and one end of the lock rod (202) is engaged with the lock groove (203).

3. The high-voltage switchgear safety protection interlocking mechanism according to claim 1, characterized in that: The elastic component includes a fixing block (3) fixed to the inner wall of the cabinet door body (2). The upper end of the fixing block (3) is provided with a spring telescopic rod (301) rotatably connected by a rotating shaft. The other end of the spring telescopic rod (301) is rotatably connected to the locking rod (202) by a rotating shaft.

4. The high-voltage switchgear safety protection interlocking mechanism according to claim 1, characterized in that: The gear assembly includes an electric switch (6) installed inside the cabinet door body (2), a gear (601) installed on the outer wall of the electric switch (6), a fixing plate (5) fixed on the inner wall of the cabinet door body (2), a limit rod (501) fixed on the inner wall of the fixing plate (5), a sliding rod (502) located on the outer wall of the limit rod (501) in a sliding connection, a rack (602) fixed on one side wall of the sliding rod (502), and the rack (602) meshing with the gear (601).

5. The high-voltage switchgear safety protection interlocking mechanism according to claim 1, characterized in that: The locking rod (503) is engaged with the first slot (401), and a connecting block (703) is fixed to one end of the locking bolt (702). The connecting block (703) is fixedly connected to the slide rod (502).

6. The high-voltage switchgear safety protection interlocking mechanism according to claim 5, characterized in that: The connecting block (703) is internally slidably connected to a guide rod (705), and a cross block (704) is fixed to one end of the guide rod (705).

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