A locking device for a main power supply of a control cabinet

Abstract

The utility model provides a kind of control cabinet main power locking device, belong to control cabinet technical field, comprising: cabinet, it is provided with main power circuit breaker, the main power circuit breaker is provided with rotatable circuit breaker switch, the circuit breaker switch can be rotated to open position or closed position;Movable plate, it is rotatably connected with the cabinet, the movable plate can be rotated to unlock position or locking position, when the movable plate rotates to the unlock position, the circuit breaker switch can be freely rotated between the open position and the closed position, when the movable plate rotates to the locking position, the circuit breaker switch is limited to the closed position.The utility model has the beneficial effect that: by setting rotatable movable plate and the linkage cooperation of circuit breaker switch of main power circuit breaker, the mechanical type locking control to main power on-off state is realized.

Description

Technical Field

[0001] This utility model belongs to the field of control cabinet technology and relates to a main power supply locking device for control cabinets. Background Technology

[0002] In fields such as elevators, industrial equipment, and power distribution systems, control cabinets, as core electrical integrated units, typically contain key switching devices such as main power circuit breakers. They are used to control the power supply to the entire machine or system. During equipment maintenance, repair, or emergency response, in order to ensure the personal safety of the operators, it is essential to ensure that the main power supply is reliably disconnected and to prevent others from accidentally reconnecting the power. This safety measure is explicitly required in international and domestic safety standards.

[0003] However, the main power circuit breakers in traditional control cabinets are usually manually operated by a handle, lacking an effective mechanical locking structure. Although some products can physically lock the circuit breaker handle with an external lock, this method often relies on the lock hole of a specific model of circuit breaker, resulting in poor versatility. Moreover, without a dedicated lock hole, it is difficult to achieve reliable limit switching, posing a risk of being forcibly moved or accidentally reset. In addition, existing solutions are mostly temporary measures, cumbersome to operate, poorly visible, and cannot be organically integrated with the cabinet structure. They are easily overlooked or bypassed, making it difficult to meet the requirements of standardized safety operating procedures. Therefore, there is considerable room for improvement. Summary of the Invention

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a main power supply locking device for a control cabinet.

[0005] The objective of this utility model can be achieved through the following technical solution: a main power supply locking device for a control cabinet, comprising:

[0006] The cabinet is equipped with a main power circuit breaker, which has a rotatable circuit breaker switch that can be rotated to the open or closed position.

[0007] A movable plate is rotatably connected to the cabinet. The movable plate can be rotated to an unlocked position or a locked position. When the movable plate is rotated to the unlocked position, the circuit breaker can rotate freely between the open position and the closed position. When the movable plate is rotated to the locked position, the circuit breaker is restricted to the closed position.

[0008] In the aforementioned main power supply locking device for a control cabinet, the cabinet is further provided with a fixed plate, and the movable plate is rotatably connected to the cabinet via the fixed plate. The fixed plate is provided with an exposed hole, through which the main power circuit breaker is exposed.

[0009] In the aforementioned main power supply locking device for a control cabinet, the cabinet body is further provided with a locking seat, the locking seat is provided with a first locking hole, and the movable plate is provided with a second locking hole. When the movable plate is rotated to the locking position, the first locking hole and the second locking hole are aligned.

[0010] The aforementioned main power supply locking device for a control cabinet also includes a padlock. When the first locking hole and the second locking hole are aligned, the padlock can pass through the first locking hole and the second locking hole in sequence to restrict the rotation of the movable plate.

[0011] In the above-mentioned main power supply locking device for control cabinet, the movable plate is provided with a limiting part. When the movable plate rotates to the locked position, the movable plate restricts the rotation of the circuit breaker through the limiting part.

[0012] In the aforementioned control cabinet main power locking device, the cabinet is further provided with a first mounting bracket, and the main power circuit breaker is mounted on the first mounting bracket.

[0013] In the aforementioned control cabinet main power locking device, the cabinet is further provided with a car lighting control power circuit breaker, which is mounted on the first mounting bracket.

[0014] In the aforementioned control cabinet main power locking device, the exposed hole exposes the car lighting control power circuit breaker.

[0015] In the aforementioned control cabinet main power locking device, the cabinet is further provided with a mounting rail, and the locking seat, the main power circuit breaker, and the car lighting control power circuit breaker are all mounted on the mounting rail and mounted on the first mounting bracket via the mounting rail.

[0016] In the aforementioned control cabinet main power supply locking device, the cabinet is further provided with a second mounting bracket, and the fixing plate is disposed on the second mounting bracket.

[0017] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0018] 1. By setting a rotatable movable plate that works in conjunction with the circuit breaker of the main power supply, mechanical locking control of the on / off state of the main power supply is achieved. When the movable plate is in the locked position, the circuit breaker is forcibly restricted to the closed (power off) position, effectively preventing others from accidentally closing the circuit breaker and powering it on during maintenance, thus fundamentally protecting the personal safety of maintenance personnel. When the movable plate is in the unlocked position, it does not affect normal operation, thus balancing the flexibility of daily use and the safety of operation.

[0019] 2. By adding a fixed plate inside the cabinet and installing the movable plate with the fixed plate as the pivot, the stability and positioning accuracy of the movable plate rotation are improved. At the same time, the exposed holes on the fixed plate allow the operating handle of the main power circuit breaker to be exposed, which is convenient for observing and operating the circuit breaker, and avoids the inability to judge the power status due to the panel being completely closed, thus improving the intuitiveness of human-machine interaction and operating efficiency.

[0020] 3. The alignment design of the first and second locking holes provides a precise locking point for padlocks and other locking components, ensuring that the movable plate can be reliably fixed in the locked position. This prevents the padlock from failing to install or from failing to lock due to hole misalignment, and enhances the operability and anti-accidental opening capability of the locking mechanism.

[0021] 4. The introduction of padlocks as a physical locking medium gives the locked state a "personal exclusive" attribute, which complies with the "locked and tagged" specification in industrial safety standards. After the padlock passes through the aligned locking holes, it completely restricts the rotation of the movable plate from a structural point of view, thereby indirectly locking the main power circuit breaker, eliminating the risk of accidental power supply, and significantly improving the safety level of maintenance operations. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the hidden part of the cabinet structure in the main power locking device of the control cabinet of this utility model.

[0023] Figure 2 This is a schematic diagram of the structure of the main power supply locking device of the control cabinet of this utility model, showing the movable plate rotating to the unlocked position.

[0024] Figure 3 This is a schematic diagram of the structure of the main power supply locking device of the control cabinet of this utility model, showing the movable plate rotating to the locked position.

[0025] In the diagram, 100 is the cabinet; 200 is the main power circuit breaker; 210 is the circuit breaker; 300 is the movable plate; 310 is the second locking hole; 320 is the limiting part; 400 is the fixing plate; 410 is the exposed hole; 500 is the padlock; 600 is the first mounting bracket; 700 is the car lighting control power circuit breaker; 800 is the mounting rail; 810 is the locking seat; 811 is the first locking hole; and 900 is the second mounting bracket. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0029] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0030] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0031] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0032] like Figures 1-3 As shown, a main power supply locking device for a control cabinet includes:

[0033] The cabinet 100 is equipped with a main power circuit breaker 200, and the main power circuit breaker 200 is equipped with a rotatable circuit breaker 210, which can be rotated to the open position or the closed position.

[0034] A movable plate 300 is rotatably connected to the cabinet 100. The movable plate 300 can be rotated to an unlocked position or a locked position. When the movable plate 300 is rotated to the unlocked position, the circuit breaker 210 can rotate freely between the open position and the closed position. When the movable plate 300 is rotated to the locked position, the circuit breaker 210 is restricted to the closed position.

[0035] It is worth noting that, Figure 2 , Figure 3 The circuit breakers 210 in the circuit are all in the closed position, while the open position corresponds to the circuit breaker 210 being rotated to the top.

[0036] In this embodiment, a mechanical locking control of the main power supply's on / off state is achieved by linking the rotatable movable plate 300 with the circuit breaker 210 of the main power circuit breaker 200. When the movable plate 300 is in the locked position, the circuit breaker 210 is forcibly restricted to the closed (power-off) position, effectively preventing others from accidentally closing the circuit breaker and powering it on during maintenance, thus fundamentally ensuring the personal safety of maintenance personnel; while in the unlocked position, normal operation is not affected, thus balancing the flexibility of daily use with operational safety.

[0037] like Figures 1-3 As shown, based on the above embodiment, the cabinet 100 is further provided with a fixing plate 400, and the movable plate 300 is rotatably connected to the cabinet 100 through the fixing plate 400. The fixing plate 400 is provided with an exposure hole 410, and the exposure hole 410 exposes the main power circuit breaker 200.

[0038] In this embodiment, by adding a fixed plate 400 inside the cabinet 100 and installing the movable plate 300 with the fixed plate 400 as the pivot, the stability and positioning accuracy of the movable plate 300 rotation are improved. At the same time, the exposed hole 410 on the fixed plate 400 exposes the operating handle of the main power circuit breaker 200, which facilitates observation and operation of the circuit breaker 210 and avoids the inability to judge the power status due to the panel being completely closed, thus improving the intuitiveness of human-machine interaction and operating efficiency.

[0039] like Figures 1-3 As shown, based on the above embodiment, the cabinet is also provided with a locking seat 810, the locking seat 810 is provided with a first locking hole 811, and the movable plate 300 is provided with a second locking hole 310. When the movable plate 300 is rotated to the locking position, the first locking hole 811 and the second locking hole 310 are aligned.

[0040] In this embodiment, the alignment design of the first locking hole 811 and the second locking hole 310 provides a precise locking point for the padlock 500 and other locking components, ensuring that the movable plate 300 can be reliably fixed in the locked position, preventing the padlock 500 from failing to be installed or from failing to lock due to hole position deviation, and enhancing the operability and anti-accidental opening capability of the locking mechanism.

[0041] like Figures 1-3 As shown, based on the above embodiment, a padlock 500 is also included. When the first locking hole 811 is aligned with the second locking hole 310, the padlock 500 can pass through the first locking hole 811 and the second locking hole 310 in sequence to restrict the rotation of the movable plate 300.

[0042] In this embodiment, a padlock 500 is introduced as a physical locking medium, giving the locking state a "personal exclusive" attribute, which complies with the "locked and tagged" specification in industrial safety standards. After the padlock 500 passes through the aligned locking holes, it completely restricts the rotation of the movable plate 300 from a structural perspective, thereby indirectly locking the main power circuit breaker 200, eliminating the risk of accidental power supply, and significantly improving the safety level of maintenance operations.

[0043] like Figures 1-3 As shown, based on the above embodiment, the movable plate 300 is provided with a limiting part 320. When the movable plate 300 rotates to the locked position, the movable plate 300 restricts the rotation of the circuit breaker 210 through the limiting part 320.

[0044] In this embodiment, the limiting part 320 on the movable plate 300 acts directly on the circuit breaker 210, forming a rigid mechanical block in the locked position. Even if the padlock 500 is not installed or fails, it can prevent the circuit breaker 210 from being turned on to a certain extent, providing a double insurance mechanism. The limiting structure is integrated into the body of the movable plate 300, requiring no additional parts, simplifying the overall structure and improving the reliability of the locking action.

[0045] like Figures 1-3 As shown, based on the above embodiment, the cabinet 100 is further provided with a first mounting bracket 600, and the main power circuit breaker 200 is disposed on the first mounting bracket 600.

[0046] In this embodiment, the main power circuit breaker 200 is securely installed in the cabinet 100 by the first mounting bracket 600, which not only improves the shock resistance and installation firmness of the electrical components, but also provides a structural basis for subsequent modular layout, facilitating standardized assembly and later maintenance and replacement.

[0047] like Figures 1-3As shown, based on the above embodiment, the cabinet 100 is further provided with a car lighting control power circuit breaker 700, which is disposed on the first mounting bracket 600.

[0048] In this embodiment, the car lighting control power circuit breaker 700 and the main power circuit breaker 200 share the same mounting bracket, which optimizes the internal space layout of the cabinet, reduces the number of brackets, and lowers manufacturing costs; at the same time, it allows the two types of key power switches to be arranged in a centralized manner, which facilitates unified management and synchronous power-off operation and improves maintenance efficiency.

[0049] like Figures 1-3 As shown, based on the above embodiment, the exposed hole 410 exposes the car lighting control power circuit breaker 700.

[0050] In this embodiment, the exposed hole 410 of the fixing plate 400 simultaneously exposes the car lighting control power circuit breaker 700, so that the operator can intuitively confirm or operate the power status of the lighting / control circuit while performing the main power lock, avoiding the safety hazards caused by only disconnecting the main power while the control circuit is still energized, and achieving more comprehensive energy isolation.

[0051] like Figures 1-3 As shown, based on the above embodiment, the cabinet 100 is also provided with a mounting rail 800. The locking seat 810, the main power circuit breaker 200 and the car lighting control power circuit breaker 700 are all provided on the mounting rail 800 and are provided on the first mounting bracket 600 through the mounting rail 800.

[0052] In this embodiment, a mounting rail 800 (such as a T35-DIN rail) is used as a universal mounting carrier for the main power circuit breaker 200 and the car lighting control power circuit breaker 700, realizing modular and standardized installation of electrical components. The rail and the first mounting bracket 600 cooperate to ensure installation rigidity and facilitate quick disassembly and replacement of components, greatly improving assembly efficiency and maintenance convenience, which is in line with the design trend of modern control cabinets.

[0053] like Figures 1-3 As shown, based on the above embodiment, the cabinet 100 is further provided with a second mounting bracket 900, and the fixing plate 400 is disposed on the second mounting bracket 900.

[0054] In this embodiment, the fixed plate 400 is independently supported by the second mounting bracket 900, which structurally decouples the locking mechanism (fixed plate 400 + movable plate 300) from the electrical installation area (first mounting bracket 600), avoiding the impact of vibration or thermal deformation of electrical components on the positioning accuracy of the locking mechanism; at the same time, it enhances the installation rigidity of the fixed plate 400, ensuring smooth rotation and reliable locking of the movable plate 300, and improving the long-term stability of the overall device.

[0055] like Figures 1-3 As shown above, this utility model provides a control cabinet main power supply locking device with reasonable structure, safety and reliability, and convenient operation. Through the organic combination of mechanical linkage and modular layout, it effectively solves the safety hazard of the main power supply being accidentally closed during maintenance of traditional control cabinets.

[0056] The device uses a rotatable movable plate 300 as the core actuator, which works in conjunction with the circuit breaker 210 of the main power circuit breaker 200. When in the locked position, the circuit breaker 210 is rigidly restricted by the limiting part 320, forcing it to remain in the power-off state. When in the unlocked position, the operating freedom is completely released, without affecting daily use. In conjunction with the exposed hole 410 on the fixed plate 400, it not only enables intuitive visibility of the main power supply and car lighting control power status, but also facilitates synchronous operation and improves human-machine interaction efficiency.

[0057] Furthermore, through the precise alignment design of the first locking hole 811 and the second locking hole 310, combined with the padlock 500, a personal locking system that complies with the "locked and tagged" security standard is achieved, physically eliminating the risk of accidental power supply. The integrated design of the limit unit 320 provides mechanical redundancy protection in the event of a padlock 500 failure, forming a dual safety guarantee.

[0058] In terms of structural layout, the device adopts a mounting rail 800 + double bracket system: the main power circuit breaker 200 and the car lighting control power circuit breaker 700 share the mounting rail 800 and are fixed to the first mounting bracket 600, realizing the standardized and modular installation of electrical components; the locking mechanism independently supports the fixing plate 400 through the second mounting bracket 900, decoupling the mechanical locking system from the electrical installation area structure, effectively isolating vibration and thermal deformation interference, and ensuring long-term operational stability and operational accuracy.

Claims

1. A main power supply locking device for a control cabinet, characterized in that, include: The cabinet is equipped with a main power circuit breaker, which has a rotatable circuit breaker switch that can be rotated to the open or closed position. A movable plate is rotatably connected to the cabinet. The movable plate can be rotated to an unlocked position or a locked position. When the movable plate is rotated to the unlocked position, the circuit breaker can rotate freely between the open position and the closed position. When the movable plate is rotated to the locked position, the circuit breaker is confined to the closed position.

2. The main power supply locking device for a control cabinet as described in claim 1, characterized in that: The cabinet is also provided with a fixed plate, and the movable plate is rotatably connected to the cabinet through the fixed plate. The fixed plate is provided with an exposed hole, through which the main power circuit breaker is exposed.

3. The main power supply locking device for a control cabinet as described in claim 2, characterized in that: The cabinet is also provided with a locking seat, which has a first locking hole, and the movable plate has a second locking hole. When the movable plate is rotated to the locking position, the first locking hole and the second locking hole are aligned.

4. The main power supply locking device for a control cabinet as described in claim 3, characterized in that: It also includes a padlock, which can pass through the first locking hole and the second locking hole in sequence when the first locking hole is aligned with the second locking hole, thereby restricting the rotation of the movable plate.

5. The main power supply locking device for a control cabinet as described in claim 1, characterized in that: The movable plate is provided with a limiting part. When the movable plate rotates to the locked position, the movable plate restricts the rotation of the circuit breaker through the limiting part.

6. The main power supply locking device for a control cabinet as described in claim 3, characterized in that: The cabinet is also provided with a first mounting bracket, and the main power circuit breaker is mounted on the first mounting bracket.

7. A control cabinet main power supply locking device as described in claim 6, characterized in that: The cabinet is also equipped with a car lighting control power circuit breaker, which is mounted on the first mounting bracket.

8. The main power supply locking device for a control cabinet as described in claim 7, characterized in that: The exposed hole exposes the car lighting control power circuit breaker.

9. A control cabinet main power supply locking device as described in claim 8, characterized in that: The cabinet is also equipped with a mounting rail. The locking seat, the main power circuit breaker, and the car lighting control power circuit breaker are all mounted on the mounting rail and mounted on the first mounting bracket via the mounting rail.

10. A control cabinet main power supply locking device as described in claim 2, characterized in that: The cabinet is also provided with a second mounting bracket, and the fixing plate is disposed on the second mounting bracket.

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