An internet of things circuit breaker with residual current protection

Abstract

The application relates to the technical field of circuit breakers, in particular to an Internet-of-Things circuit breaker with residual current protection, which comprises a shell, a lock frame, a lock rod and a lock box fixedly connected to the lock frame, a handle is rotationally arranged on the shell, two opposite frame strips of the lock frame arranged along the rotation direction of the handle are locking frame strips, a threaded hole is formed in one of the locking frame strips, the other locking frame strip can abut against the handle, the lock rod comprises a rod cap for hand holding, the lock rod can be screwed into the threaded hole of the locking frame strip and abut against the handle, the lock box is arranged along the arrangement direction of the two locking frame strips, the lock box has an inner cavity and is used for containing the rod cap, a door body is movably arranged on the lock box, the door body can be moved to open the lock box, and the door body can also be moved to close the lock box. While realizing the locking function, the problem of space interference with adjacent circuit breakers caused by the oversize padlock is avoided, and the Internet-of-Things circuit breaker with residual current protection is especially suitable for densely-installed power distribution environments.

Description

Technical Field

[0001] This application relates to the field of circuit breakers, and more particularly to an Internet of Things (IoT) circuit breaker with residual current protection. Background Technology

[0002] A circuit breaker is an automatic safety switch used to protect circuits from overload and short-circuit damage; it is a type of power electronic component. Its core function is to automatically disconnect the circuit (trip) when an abnormal current is detected, thereby preventing wire overheating, fire risks, and equipment damage.

[0003] When it is necessary to lock the circuit breaker in the "open" state for maintenance, a padlock needs to be added to the circuit breaker handle. However, the sizes of common padlocks on the market vary. Large padlocks may be too big and cause spatial interference with the handle of the adjacent circuit breaker that is already "closed" when locked, making it impossible to operate the adjacent circuit breaker. Summary of the Invention

[0004] To prevent the padlock from interfering with adjacent circuit breakers, this application provides an IoT circuit breaker with residual current protection.

[0005] This application provides an IoT circuit breaker with residual current protection, which adopts the following technical solution: An IoT circuit breaker with residual current protection includes a housing, a lock frame, a lock rod, and a lock box fixedly connected to the lock frame. A handle is rotatably mounted on the housing. Two opposing frames of the lock frame, arranged along the rotation direction of the handle, are locking strips. One locking strip has a threaded hole, and the other locking strip can abut against the handle. The lock rod includes a handle cap for holding. The lock rod can be screwed into the threaded hole of the locking strip and abut against the handle. The lock box and lock frame are arranged along the direction of the two locking strips. The lock box has an inner cavity for accommodating the handle cap. A door is movably mounted on the lock box. The door can be moved to open the lock box and also to close the lock box.

[0006] By adopting the above technical solution, a lock frame, lock rod, and lock box with a door are provided, resulting in a compact locking mechanism. The lock rod can be screwed into the threaded hole of the lock frame and the handle is pressed against the lock frame bar, achieving mechanical locking of the handle and enabling self-locking of the handle to prevent accidental operation. The lock box is used to house the rod cap, and the opening and closing of the door controls the hiding or rotation of the rod cap. The rod cap can only be rotated when the door is open; if the door is closed, the rod cap cannot be operated, improving the security and tamper resistance of the lock. The overall design achieves the locking function while reducing the use of external padlocks, avoiding spatial interference with adjacent circuit breakers due to excessively large padlock size, making it particularly suitable for densely installed power distribution environments.

[0007] Optionally, the handle has a locking groove for inserting the end of the locking bar away from the bar cap.

[0008] By adopting the above technical solution, a locking groove is opened on the handle for the end of the locking rod to be inserted, which allows the locking rod to more stably fix the handle after being screwed in, thereby enhancing the reliability and vibration resistance of the locking. The matching structure between the locking groove and the locking rod is simple and easy to operate, while reducing the risk of locking failure due to the locking rod slipping, further improving the safety of the circuit breaker in the open maintenance state.

[0009] Optionally, the housing has a pressure relief hole communicating with the inner cavity. The lock frame can be slidably fitted onto the housing along the height direction. When the handle is in the closed state, the lock frame can cover the pressure relief hole. When the handle is in the open state, the lock frame can slide away from the pressure relief hole, exposing the pressure relief hole.

[0010] By adopting the above technical solution, a pressure relief hole is provided on the housing, and the pressure relief hole is covered or exposed by the sliding of the locking frame along the height direction, realizing the linkage between the pressure relief function and the handle status. When the handle is in the closed position, the locking frame covers the pressure relief hole, keeping the housing sealed, which can prevent dust and insects; when the handle is open, the sliding of the locking frame exposes the pressure relief hole, which is conducive to the release of internal heat or pressure. This design not only improves the heat dissipation and safety performance of the circuit breaker, but also simplifies the operation steps through structural linkage.

[0011] Optionally, the door body is rotatably mounted on the lock box, and the rotation axis of the door body extends along the arrangement direction of the two locking frame bars. When the lock frame is slidably fitted onto the housing, the door body is opened, and the locking rod can rotate around the rotation axis of the handle. When the handle is rotated to the open position, the locking rod can rotate to the end to abut against and push the door body.

[0012] By adopting the above technical solution, the door is in the open state when the lock frame is slidably fitted onto the housing, allowing the lock rod to rotate around the handle's rotation axis. When the handle is rotated to the open position, the lock rod can rotate and push the door, thereby lifting the lock frame to expose the pressure relief hole, forming a mechanical linkage and reducing operational complexity.

[0013] Optionally, the rod cap is provided with a locking block, and the handle is provided with a locking groove. When the locking rod rotates around the rotation axis of the handle, the locking block is inserted into the locking groove.

[0014] By adopting the above technical solution, a locking block is set on the rod cap, and a corresponding locking groove is opened on the handle. This allows the locking block to insert into the groove during the rotation of the locking rod, forming a positioning and fixing function, so that the handle directly drives the locking rod to rotate. This locking structure enhances the rotational stability of the locking rod, prevents it from rotating accidentally due to vibration or external force, and ensures response speed.

[0015] Optionally, the housing has a rotating hole, the rotating shaft of the handle is located in the rotating hole, the locking block is located on the surface of the rod cap near the rod portion of the locking rod, the rod portion of the locking rod has a threaded hole, a screw is threaded into the threaded hole of the locking rod, and the shank of the screw passes through the threaded hole of the locking rod and is inserted into the rotating hole.

[0016] By adopting the above technical solution, the locking bar is first inserted into the slot on the handle, and then the screw is screwed into the threaded hole so that the end is inserted into the rotating hole, thus achieving direct fixation between the locking bar and the handle. This connection method has a stable structure, is easy to install, and further enhances the connection strength between the locking bar and the handle, preventing the locking bar from shifting or loosening during rotation.

[0017] Optionally, the door body is provided in two symmetrical arrangements, and when the lock frame is slidably fitted onto the housing, the two door bodies can clamp the housing and slide.

[0018] By adopting the above technical solution, two symmetrical door bodies are designed so that when the lock frame slides onto the housing, the two door bodies can clamp the housing and slide synchronously. This symmetrical structure improves the smoothness and centering of the door body sliding, making the sliding of the lock frame smoother.

[0019] Optionally, a glow-in-the-dark sticker is provided on the surface of the handle where the locking groove is opened.

[0020] By adopting the above technical solution, a luminous sticker is placed on the surface of the handle with the locking groove. When the handle is in the closed position, the luminous sticker faces the housing and is not visible to the operator. When the handle is in the open position, the luminous sticker faces away from the housing and is visible to the operator. This allows for clear identification of the circuit breaker's open position even in low-light conditions, facilitating quick and accurate decision-making by the user. This design improves the product's ease of use and safety, and is particularly suitable for emergency maintenance or nighttime operation scenarios.

[0021] In summary, this application includes at least one of the following beneficial technical effects: 1. While achieving the locking function, the lock is also miniaturized, avoiding spatial interference with adjacent circuit breakers due to excessively large padlock size, making it particularly suitable for densely installed power distribution environments; 2. When the handle is in the closed position, the lock frame blocks the pressure relief hole, keeping the housing sealed, which can prevent dust and insects. When the handle is open, the lock frame slides to expose the pressure relief hole, which is conducive to the release of internal heat or pressure. This design not only improves the heat dissipation and safety performance of the circuit breaker, but also simplifies the operation steps through structural linkage. 3. First, insert the locking block on the rod cap into the slot on the handle, then screw the screw into the threaded hole and insert the end into the rotating hole. This achieves direct fixation between the locking rod and the handle. This connection method is structurally stable and easy to install, further enhancing the connection strength between the locking rod and the handle and preventing the locking rod from shifting or loosening during rotation. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the lock frame in the locked handle state and the door closed.

[0023] Figure 2 This is a schematic diagram of the structure of the lock frame in the locked handle state and the door is open.

[0024] Figure 3 This is a schematic diagram of the structure of the lock frame slidingly sleeved on the housing and the handle in the open position.

[0025] Figure 4 This is a schematic diagram of the structure of the lock frame slidingly sleeved on the housing and the handle in the closed state.

[0026] Figure 5 This is an exploded view of the housing, locking rod, and screws of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Housing; 11. Pressure relief hole; 12. Rotation hole; 2. Lock frame; 21. Locking frame strip; 3. Locking rod; 31. Rod cap; 4. Lock box; 5. Handle; 51. Lock groove; 52. Card slot; 6. Door body; 7. Card block; 8. Screw. Detailed Implementation

[0028] The following combination Figures 1-5 This application will be described in further detail.

[0029] This application discloses an Internet of Things (IoT) circuit breaker with residual current protection. (Refer to...) Figure 1 and Figure 2 The residual current protected IoT circuit breaker includes a housing 1, a lock frame 2, a lock rod 3, and a lock box 4. A handle 5 is rotatably mounted on the housing 1. When the lock frame 2 locks the handle 5, the lock frame 2 and lock box 4 are arranged along the height direction of the housing 1. Two opposing frame edges of the lock frame 2 arranged along the height direction of the housing 1 are locking frame bars 21. One locking frame bar 21 has a threaded hole, and the other locking frame bar 21 can abut against the handle 5. The lock rod 3 includes a handle cap 31 for holding, and the lock rod 3 can be screwed into the threaded hole on the lock frame 2 and abut against the handle 5. The lock box 4 is used to accommodate the handle cap 31, and a door 6 is movably mounted on the lock box 4, which can be moved to open or close the lock box 4. This application provides a compact locking mechanism that reduces the use of external padlocks and avoids the problem of spatial interference with adjacent circuit breakers due to excessively large padlock sizes.

[0030] Reference Figure 1 The housing 1 is the main support structure of the circuit breaker, usually made of high-strength plastic, which has good insulation and durability.

[0031] Reference Figure 2 The handle 5 is used to control the opening and closing operations of the circuit breaker. Its rotating shaft can be mounted on the housing 1 via bearings and other components to ensure flexible rotation. The handle 5 has a locking groove 51 for inserting the end of the locking rod 3 away from the rod cap 31. The shape and size of the locking groove 51 match the end of the locking rod 3, allowing the locking rod 3 to more stably fix the handle 5 after being screwed in. The locking groove 51 improves the reliability and vibration resistance of the locking mechanism, reducing the risk of locking failure due to slippage of the locking rod 3.

[0032] Reference Figure 1 The lock frame 2 can be made of plastic, making it lightweight. The lock frame 2 is square and has four edges. When locking the handle 5, the lock frame 2 can fit over the handle 5, with the handle 5 extending into the inner cavity of the lock frame 2.

[0033] Reference Figure 1 and Figure 2 The threaded hole on the lock frame 2 can be set at an angle, and the lock groove 51 is also set at an angle, so that the lock rod 3 is also set at an angle after being screwed into the threaded hole, and the included angle between it and the surface of the handle 5 is as close as possible to 90°, which can improve the fixing effect.

[0034] Reference Figure 1 and Figure 2 The locking bar 3 can be made of metal materials, such as stainless steel or aluminum alloy. The bar cap 31 can be designed in a shape that is easy to grip, such as round or oval, and the surface can also be provided with anti-slip texture to increase grip friction.

[0035] Reference Figure 1 The lock box 4 can be made of plastic, and its shape can be designed according to the shape and size of the rod cap 31 to ensure that the rod cap 31 can be inserted smoothly. The lock box 4 is fixedly connected to the lock frame 2 by bolts or other means.

[0036] Reference Figure 1 and Figure 2 The door body 6 is rotatably connected to the lock box 4 via hinges or other means, allowing the door body 6 to rotate 90° to open or close the lock box 4. The rotation axis of the door body 6 extends along the arrangement direction of the lock box 4 and the lock frame 2. In other embodiments, the door body 6 can be slidably mounted on the lock box 4 via a slide rail, thus enabling the lock box 4 to be opened or closed by sliding.

[0037] Reference Figure 1 and Figure 2There are two door bodies 6 arranged symmetrically. One door body 6 has a locking groove, and the other door body 6 has a slidable latch and a keyhole. The operator can lock the two door bodies 6 by inserting a special key into the keyhole and driving the latch into the locking groove, so that the door body 6 is kept in the closed lock box 4 state, preventing anyone from accidentally operating the lock rod 3.

[0038] Reference Figure 3 and Figure 4 The housing 1 has a pressure relief hole 11 communicating with the inner cavity. When the circuit breaker is operating normally, the locking frame 2 can slide onto the housing 1 along its height. When the handle 5 is in the closed position, the locking frame 2 can cover the pressure relief hole 11, serving to prevent dust and insects; when the handle 5 is in the open position, the locking frame 2 can slide away from the pressure relief hole 11, exposing the pressure relief hole 11, which is beneficial for the release of internal heat or pressure. The setting of the pressure relief hole 11 improves the heat dissipation and safety performance of the circuit breaker, and simplifies the operation steps through structural linkage.

[0039] Reference Figure 3 When the lock frame 2 is slidably fitted onto the housing 1, the door 6 is in the open state, and the locking rod 3 is removed from the lock frame 2 and can rotate around the rotation axis of the handle 5. When the handle 5 is rotated to the open state, the handle 5 can drive the locking rod 3 to rotate until its end abuts against and pushes the door 6, thereby causing the lock frame 2 to rise to expose the pressure relief hole 11. This mechanical linkage reduces the complexity of operation and improves the convenience of use.

[0040] Reference Figure 3 and Figure 5 A locking block 7 is integrally formed or welded to the surface of the rod cap 31 near the rod portion of the locking rod 3. A slot 52 is provided on the handle 5. When the locking rod 3 rotates around the rotation axis of the handle 5, the locking block 7 inserts into the slot 52. The cooperation between the locking block 7 and the slot 52 provides positioning and fixing, allowing the handle 5 to directly drive the locking rod 3 to rotate, enhancing the rotational stability of the locking rod 3 and preventing accidental rotation due to vibration or external force. In other embodiments, the locking block 7 and slot 52 may be omitted, and the locking rod 3 and handle 5 may be fixed together by bolts.

[0041] Reference Figure 5 A rotating hole 12 is provided on the side of the housing 1, and the rotating shaft of the handle 5 is installed in the rotating hole 12. A threaded hole is provided on the rod of the locking rod 3, and a screw 8 is threaded into the threaded hole. The rod of the screw 8 passes through the threaded hole and is inserted into the rotating hole 12, so that the locking rod 3 can rotate around the screw 8. In other embodiments, a pin can be used instead of the screw 8.

[0042] In other embodiments, a sensor and a drive source can be installed on the housing 1. The sensor is used to detect the opening and closing status of the handle 5 and ultimately control the start and stop of the drive source. The drive source is used to drive the lifting and lowering of the lock frame 2.

[0043] Reference Figure 3 and Figure 4 When the lock frame 2 is slidably fitted onto the housing 1, the two door bodies 6 can clamp the housing 1 and slide. The symmetrically arranged door bodies 6 improve the smoothness and centering of the sliding of the door bodies 6, making the sliding of the lock frame 2 smoother. In other embodiments, guide structures can be added to the door bodies 6 and the housing 1 to guide the sliding of the door bodies 6.

[0044] A glow-in-the-dark sticker (not shown in the figure) is affixed to the surface of the handle 5 where the locking groove 51 is located. The glow-in-the-dark sticker can emit light in low-light environments, allowing the operator to clearly identify the handle 5 when it is in the open position, facilitating quick and accurate judgment of opening and closing, and improving the ease of use and safety of the product.

[0045] The housing 1 also integrates an IoT communication module, sensors, and control unit (not shown in the figure) to achieve real-time monitoring and data acquisition functions: remote real-time monitoring of line voltage, current, power, power factor, and power consumption; once a trip occurs (whether due to overload, short circuit, or leakage), it will immediately alarm the administrator via APP, SMS, etc., and record the trip cause, trip time, and current and voltage data before and after the trip; it can also display and upload the current residual current value in real time, allowing the administrator to promptly detect potential hazards such as line insulation aging (e.g., a slow increase in residual current value) and provide early warning and maintenance before a trip occurs; the administrator can also remotely turn the circuit breaker on or off anytime, anywhere via mobile APP, computer web terminal, or management platform.

[0046] The working principle of an IoT circuit breaker with residual current protection according to an embodiment of this application is as follows: The circuit breaker is used in electrical equipment such as electricity metering boxes. When the electrical equipment needs to be repaired, the handle 5 needs to be turned to the open state. At this time, the handle 5 is locked by the lock frame 2 and the lock rod 3. When the circuit breaker is working normally, the door 6 on the lock box 4 is opened, the lock frame 2 is fitted onto the housing 1, and the lock rod 3 is rotated and installed on the housing 1 and fixed to the handle 5. At this time, the lock frame 2 blocks the pressure relief hole 11. If the circuit breaker trips, the handle 5 is turned to the open state, and at the same time, the lock rod 3 is rotated to push the door 6 to rise, thereby driving the lock frame 2 to rise to expose the pressure relief hole 11.

[0047] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An IoT circuit breaker with residual current protection, characterized in that: The lock includes a housing (1), a lock frame (2), a lock rod (3), and a lock box (4) fixedly connected to the lock frame (2). A handle (5) is rotatably provided on the housing (1). The two opposite frames of the lock frame (2) arranged along the rotation direction of the handle (5) are locking frame bars (21). One locking frame bar (21) has a threaded hole, and the other locking frame bar (21) can abut against the handle (5). The lock rod (3) includes a rod cap (31) for holding. The lock rod (3) can be screwed into the threaded hole of the locking frame bar and abut against the handle (5). The lock box (4) and the lock frame (2) are arranged along the arrangement direction of the two locking frame bars (21). The lock box (4) has an inner cavity for accommodating the rod cap (31). A door (6) is movably provided on the lock box (4). The door (6) can be moved to open the lock box (4) and the door (6) can also be moved to close the lock box (4).

2. The IoT circuit breaker with residual current protection according to claim 1, characterized in that: The handle (5) has a locking groove (51) for inserting the end of the locking bar (3) away from the bar cap (31).

3. The IoT circuit breaker with residual current protection according to claim 1, characterized in that: The housing (1) has a pressure relief hole (11) communicating with the inner cavity. The lock frame (2) can slide on the housing (1) along the height direction of the housing (1). When the handle (5) is in the closed state, the lock frame (2) can block the pressure relief hole (11). When the handle (5) is in the open state, the lock frame (2) can slide away from the pressure relief hole (11) so that the pressure relief hole (11) is exposed.

4. The IoT circuit breaker with residual current protection according to claim 3, characterized in that: The door body (6) is rotatably mounted on the lock box (4). The rotation axis of the door body (6) extends along the arrangement direction of the two locking frame bars (21). When the lock frame (2) is slidably mounted on the housing (1), the door body (6) is opened. The locking rod (3) can rotate around the rotation axis of the handle (5). When the handle (5) is rotated to the open state, the locking rod (3) can rotate to the end to abut against and push the door body (6).

5. The IoT circuit breaker with residual current protection according to claim 4, characterized in that: The rod cap (31) is provided with a locking block (7), and the handle (5) is provided with a slot (52). When the locking rod (3) rotates around the rotation axis of the handle (5), the locking block (7) is inserted into the slot (52).

6. The IoT circuit breaker with residual current protection according to claim 5, characterized in that: The housing (1) has a rotating hole (12), the rotating shaft of the handle (5) is located in the rotating hole (12), the locking block (7) is located on the surface of the rod cap (31) near the rod part of the locking rod (3), the rod part of the locking rod (3) has a threaded hole, and a screw (8) is threaded into the threaded hole of the locking rod (3). The rod part of the screw (8) passes through the threaded hole of the locking rod (3) and is inserted into the rotating hole (12).

7. The IoT circuit breaker with residual current protection according to claim 4, characterized in that: The door body (6) is provided in two symmetrical arrangements. When the lock frame (2) is slidably sleeved on the housing (1), the two door bodies (6) can clamp the housing (1) and slide.

8. The IoT circuit breaker with residual current protection according to claim 1, characterized in that: The handle (5) has a glow-in-the-dark sticker on its surface where a locking groove (51) is opened.

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