Air switch capable of preventing mistaken switching-on
By designing a mechanical structure to prevent accidental closing on the air switch, and utilizing the cooperation of the stop lever and the pin, the safety accident problem caused by accidental closing of the air switch in the distribution cabinet is solved, achieving higher operational safety and reliability.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- THREE GORGES JINSHAJIANG CHUANYUN HYDROPOWER DEV CO LTD
- Filing Date
- 2025-06-12
- Publication Date
- 2026-05-15
AI Technical Summary
Traditional air switches are prone to accidental energization due to misjudging the open/closed state in the limited space of the distribution cabinet, which can lead to safety accidents.
The design incorporates a mechanical structure to prevent accidental closing. The combination of a stop lever and a pin prevents the air switch from closing during accidental operation. A rotating shaft and a limit head ensure the stability and detachability of the stop lever.
It effectively prevents accidental closing of air switches, avoids safety hazards, and improves the safety and reliability of operation.
Smart Images
Figure CN224248576U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electrical switch technology, and in particular to an air switch that prevents accidental closing. Background Technology
[0002] An air switch (also known as an air circuit breaker) is an automatic protective electrical device used to quickly cut off power supply in the event of overload, short circuit, or leakage, preventing equipment damage and fire risks. It achieves precise protection through built-in electromagnetic and thermal tripping mechanisms, and can be manually switched on and off as needed, making it an indispensable safety device in modern electrical systems.
[0003] In real-life and work situations, a distribution cabinet typically contains multiple circuit breakers, each corresponding to a different power supply load. Users can switch on or off one or more circuit breakers as needed. However, traditional circuit breakers present the following problems:
[0004] If a circuit breaker in the cabinet is disconnected due to circuit maintenance, and another work requires disconnecting or closing other circuit breakers in the same distribution cabinet, the worker may mistakenly close the circuit breaker that should be kept open, causing an accidental power supply and a safety incident.
[0005] In practice, air switches in distribution cabinets may be arranged horizontally due to space constraints. In this case, their open / closed status may be misjudged. As a result, when workers are working in the distribution cabinet, they may accidentally close the air switch that should be kept open, causing accidental power supply and leading to a safety accident. Utility Model Content
[0006] To address the aforementioned problems, this utility model provides an air switch designed to prevent accidental closing. By designing an anti-accidental closing mechanical structure, a secondary warning is given to the operator when the switch is closed using a mechanical blocking method, preventing accidental closing of the air switch and avoiding safety hazards.
[0007] This utility model provides an air switch to prevent accidental closing, and the specific technical solution is as follows:
[0008] It includes a switch body and an anti-misoperation structure, wherein the anti-misoperation structure includes a stop bar and a pin;
[0009] One end of the stop lever is provided with a rotating shaft, and the stop lever is rotatably connected to the switch body through the rotating shaft;
[0010] The other end of the stop lever is detachably connected to the switch body. When the two ends of the stop lever are respectively placed at the rotatable connection point and the detachable connection point with the switch body, they are located on the opening and closing rotation path of the switch body.
[0011] Furthermore, the end of the rotating shaft is provided with a limiting head, the size of which is larger than the diameter of the rotating shaft.
[0012] The stop lever is prevented from detaching by a limit head.
[0013] Furthermore, the rotating shaft is fixedly connected to the switch body, and the stop lever is rotatably connected to the rotating shaft.
[0014] Furthermore, at the rotatable connection between the stop bar and the rotating shaft, a through hole and a groove are provided on the side away from the switch body. The groove diameter is larger than the through hole diameter. The rotating shaft passes through the through hole, and the limiting head is placed in the groove.
[0015] This structure ensures that the lever will not detach from the pivot while rotating.
[0016] Furthermore, the top of the rotating shaft is provided with an axially threaded hole, and the limiting head is screwed into the threaded hole through a protrusion with external threads, and is detachably connected to the rotating shaft.
[0017] This structure facilitates the removal of the limit head, and subsequently the removal and replacement of the stop lever.
[0018] Furthermore, the other end of the rotating shaft relative to the limiting head is vertically and fixedly connected to the stop rod. The switch body is provided with a rotating hole, which is a slot structure formed by two cylindrical grooves of different diameters superimposed. The end of the rotating shaft where the limiting head is located is placed in the rotating hole and is rotatably connected relative to the switch body.
[0019] This structure ensures the stability of the lever's rotation.
[0020] Furthermore, one end of the stop bar that is detachably connected to the switch body is provided with a through hole, and the switch body is provided with a slot, the through hole and the slot having the same axial direction.
[0021] Furthermore, the horizontal height of the insertion end of the socket and the slot is higher than the horizontal height of the tail.
[0022] To prevent the pin from falling out when it is inserted.
[0023] Furthermore, the switch body is also provided with a placement groove, which is adapted to the pin.
[0024] This allows for easy placement of the removed pin when preparing to turn the stop lever.
[0025] Furthermore, the horizontal height of the insertion end of the placement slot is not lower than the horizontal height of the tail.
[0026] To prevent the pin from falling out of the slot.
[0027] The beneficial effects of this utility model are as follows:
[0028] This utility model incorporates an anti-accidental closing structure based on an air switch. The structure features a stop lever directly above the air switch's opening / closing handle. The stop lever rotates via a shaft. When the switch is closed, the stop lever rotates counter-clockwise until it is perpendicular to the opening / closing handle, without affecting the switch's opening position. When the switch is open, the stop lever is horizontal with the opening / closing handle. One end of the stop lever is detachably connected to the switch body and is fixedly attached to the switch body. If the detachable anti-accidental closing end is not unlocked, the switch handle will contact and be blocked by the stop lever when closing, preventing the switch from closing. This solves the problem of accidental energization and safety accidents caused by accidental closing of traditional air switches under certain circumstances. Attached Figure Description
[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0030] Figure 2 This is a schematic diagram of the stop bar structure of this utility model.
[0031] Figure 3 This is a schematic diagram of the assembly structure of this utility model.
[0032] Figure 4 This is a schematic diagram of the detachable connection end of the stop bar of this utility model.
[0033] Explanation of reference numerals in the attached diagram: 1-Switch body, 2-Handle, 3-Stop bar, 4-Shaft, 5-Socket, 6-Slot, 7-Pin, 8-Placement slot. Detailed Implementation
[0034] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, and not all of them. The components of the embodiments of the present utility model described and shown in the accompanying drawings can be arranged and designed in various different configurations. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0035] In the description of the embodiments of this utility model, it should be noted that the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, or the orientation or positional relationship commonly understood by those skilled in the art, or the orientation or positional relationship commonly used when the utility model product is in use. These are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model. Furthermore, the terms "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.
[0036] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0037] Example 1
[0038] Embodiment 1 of this utility model discloses an air switch to prevent accidental closing, such as... Figure 1 As shown, the details are as follows:
[0039] It includes a switch body 1 and an anti-misoperation structure, wherein the anti-misoperation structure includes a stop bar 3 and a pin 7;
[0040] like Figure 2 As shown, one end of the stop lever 3 is provided with a rotating shaft 4, and the stop lever 3 is rotatably connected to the switch body 1 through the rotating shaft 4;
[0041] like Figure 3 As shown, the other end of the stop lever 3 is detachably connected to the switch body 1. When the two ends of the stop lever 3 are respectively placed at the rotational connection point and the detachable connection point with the switch body 1, they are located on the opening and closing rotation path of the switch body 1, that is, above the opening and closing handle 2.
[0042] When both ends of the stop lever 3 are connected to the switch body 1, it blocks the closing operation of the switch knife, thus avoiding safety risks.
[0043] In a preferred embodiment, the end of the rotating shaft 4 is provided with a limiting head, the size of which is larger than the diameter of the rotating shaft 4, to prevent the stop bar 3 from disengaging from the rotating shaft 4.
[0044] The rotating shaft 4 is fixedly connected to the switch body 1, and the stop rod 3 is rotatably connected to the rotating shaft 4, that is, the stop rod 3 rotates around the rotating shaft 4.
[0045] At the rotatable connection between the stop bar 3 and the rotating shaft 4, a through hole and a groove are provided on the side away from the switch body 1. The groove diameter is larger than the through hole diameter. The rotating shaft 4 passes through the through hole, and the limiting head is placed in the groove.
[0046] As a preferred embodiment, such as Figure 2 and Figure 4 As shown, the end of the stop bar 3 that is detachably connected to the switch body 1 is provided with a through hole 5 that passes through the stop bar 3, and the switch body 1 is provided with a slot 6, with the through hole 5 and the slot 6 having the same axial direction.
[0047] In a preferred embodiment, the horizontal height of the insertion end of the socket 5 and the slot 6 is higher than the horizontal height of the tail, that is, the axial direction of the socket 5 and the slot 6 is at an angle to the horizontal plane where the stop bar 3 is located, so as to ensure that the pin 7 will not fall out after passing through the socket 5 and being inserted into the slot 6.
[0048] In a preferred embodiment, the switch body 1 is further provided with a placement groove 8, which is adapted to the pin 7 and is used to place the pin 7 removed from the socket 5 and the slot 6.
[0049] Specifically, the placement slot 8 is located below the slot 6.
[0050] In a preferred embodiment, the horizontal height of the insertion end of the placement slot 8 is not lower than the horizontal height of the tail end, ensuring that the pin 7 can be stably placed in the placement slot 8.
[0051] Based on the structure of this embodiment, the locking and unlocking of the anti-misalignment structure are as follows:
[0052] Anti-misoperation locking structure: The stop lever rotates around the pivot 4. Then, the end of the stop lever with the insertion hole 5 rotates until the insertion hole 5 is axially aligned with the slot 6. Next, the pin 7 is removed from the placement groove 8, passes through the insertion hole 5, and inserted into the slot 6, thus horizontally fixing the stop lever. Figure 3 As shown, if the circuit breaker is closed at this time, handle 2 will touch the stop lever and be blocked, making it impossible to close the circuit breaker.
[0053] Unlocking the anti-misoperation structure: When it is necessary to close the circuit, remove the pin 7 from the socket 5 and slot 6 and place it in the placement slot 8. The stop lever will naturally rotate downward under the action of gravity through the rotating shaft 4 to a position perpendicular to the handle 2, and the air switch can be closed normally.
[0054] Example 2
[0055] Embodiment 2 of this utility model discloses an air switch to prevent accidental closing, such as... Figure 1As shown, the details are as follows:
[0056] It includes a switch body 1 and an anti-misoperation structure, wherein the anti-misoperation structure includes a stop bar 3 and a pin 7;
[0057] like Figure 2 As shown, one end of the stop lever 3 is provided with a rotating shaft 4, and the stop lever 3 is rotatably connected to the switch body 1 through the rotating shaft 4;
[0058] like Figure 3 As shown, the other end of the stop lever 3 is detachably connected to the switch body 1. When the two ends of the stop lever 3 are respectively placed at the rotational connection point and the detachable connection point with the switch body 1, they are located on the opening and closing rotation path of the switch body 1, that is, above the opening and closing handle 2.
[0059] When both ends of the stop lever 3 are connected to the switch body 1, it blocks the closing operation of the switch knife, thus avoiding safety risks.
[0060] In a preferred embodiment, the end of the rotating shaft 4 is provided with a limiting head, the size of which is larger than the diameter of the rotating shaft 4, to prevent the stop bar 3 from disengaging from the rotating shaft 4.
[0061] The rotating shaft 4 is fixedly connected to the switch body 1, and the stop rod 3 is rotatably connected to the rotating shaft 4, that is, the stop rod 3 rotates around the rotating shaft 4.
[0062] At the rotatable connection between the stop bar 3 and the rotating shaft 4, a through hole and a groove are provided on the side away from the switch body 1. The groove diameter is larger than the through hole diameter. The rotating shaft 4 passes through the through hole, and the limiting head is placed in the groove.
[0063] In a preferred embodiment, the top of the rotating shaft 4 is provided with an axial threaded hole, and the limiting head is screwed into the threaded hole through a protrusion with external threads, and is detachably connected to the rotating shaft 4.
[0064] Based on this structure, it is easy to disassemble and replace the limiting head and the stop bar 3.
[0065] As a preferred embodiment, such as Figure 2 and Figure 4 As shown, the end of the stop bar 3 that is detachably connected to the switch body 1 is provided with a through hole 5 that passes through the stop bar 3, and the switch body 1 is provided with a slot 6, with the through hole 5 and the slot 6 having the same axial direction.
[0066] In a preferred embodiment, the horizontal height of the insertion end of the socket 5 and the slot 6 is higher than the horizontal height of the tail, that is, the axial direction of the socket 5 and the slot 6 is at an angle to the horizontal plane where the stop bar 3 is located, so as to ensure that the pin 7 will not fall out after passing through the socket 5 and being inserted into the slot 6.
[0067] In a preferred embodiment, the switch body 1 is further provided with a placement groove 8, which is adapted to the pin 7 and is used to place the pin 7 removed from the socket 5 and the slot 6.
[0068] Specifically, the placement slot 8 is located below the slot 6.
[0069] In a preferred embodiment, the horizontal height of the insertion end of the placement slot 8 is not lower than the horizontal height of the tail end, ensuring that the pin 7 can be stably placed in the placement slot 8.
[0070] Based on the structure of this embodiment, the locking and unlocking of the anti-misalignment structure are as follows:
[0071] Anti-misoperation locking structure: The stop lever rotates around the pivot 4. Then, the end of the stop lever with the insertion hole 5 rotates until the insertion hole 5 is axially aligned with the slot 6. Next, the pin 7 is removed from the placement groove 8, passes through the insertion hole 5, and inserted into the slot 6, thus horizontally fixing the stop lever. Figure 3 As shown, if the circuit breaker is closed at this time, handle 2 will touch the stop lever and be blocked, making it impossible to close the circuit breaker.
[0072] Unlocking the anti-misoperation structure: When it is necessary to close the circuit, remove the pin 7 from the socket 5 and slot 6 and place it in the placement slot 8. The stop lever will naturally rotate downward under the action of gravity through the rotating shaft 4 to a position perpendicular to the handle 2, and the air switch can be closed normally.
[0073] Example 3
[0074] Embodiment 3 of this utility model discloses an air switch to prevent accidental closing, such as... Figure 1 As shown, the details are as follows:
[0075] It includes a switch body 1 and an anti-misoperation structure, wherein the anti-misoperation structure includes a stop bar 3 and a pin 7;
[0076] like Figure 2 As shown, one end of the stop lever 3 is provided with a rotating shaft 4, and the stop lever 3 is rotatably connected to the switch body 1 through the rotating shaft 4;
[0077] like Figure 3As shown, the other end of the stop lever 3 is detachably connected to the switch body 1. When the two ends of the stop lever 3 are respectively placed at the rotational connection point and the detachable connection point with the switch body 1, they are located on the opening and closing rotation path of the switch body 1, that is, above the opening and closing handle 2.
[0078] When both ends of the stop lever 3 are connected to the switch body 1, it blocks the closing operation of the switch knife, thus avoiding safety risks.
[0079] In a preferred embodiment, the end of the rotating shaft 4 is provided with a limiting head, the size of which is larger than the diameter of the rotating shaft 4, to prevent the stop bar 3 from disengaging from the rotating shaft 4.
[0080] In a preferred embodiment, the other end of the rotating shaft 4 relative to the limiting head is vertically fixedly connected to the stop rod 3. The switch body 1 is provided with a rotating hole, which is a slot structure formed by two cylindrical grooves of different diameters superimposed. The end of the rotating shaft 4 where the limiting head is located is placed in the rotating hole and is rotatably connected to the switch body 1.
[0081] Specifically, the rotating shaft 4 is placed in a cylindrical slot structure outside the rotating hole, and the limiting head is placed in a cylindrical slot structure inside the rotating hole. The size of the rotating shaft 4 is adapted to the diameter of the slot in the rotating hole.
[0082] Compared to the preferred structure provided in Embodiment 1, this structure provides better rotational stability for the stop bar 3, but the stop bar cannot be disassembled.
[0083] As a preferred embodiment, such as Figure 2 and Figure 4 As shown, the end of the stop bar 3 that is detachably connected to the switch body 1 is provided with a through hole 5 that passes through the stop bar 3, and the switch body 1 is provided with a slot 6, with the through hole 5 and the slot 6 having the same axial direction.
[0084] In a preferred embodiment, the horizontal height of the insertion end of the socket 5 and the slot 6 is higher than the horizontal height of the tail, that is, the axial direction of the socket 5 and the slot 6 is at an angle to the horizontal plane where the stop bar 3 is located, so as to ensure that the pin 7 will not fall out after passing through the socket 5 and being inserted into the slot 6.
[0085] In a preferred embodiment, the switch body 1 is further provided with a placement groove 8, which is adapted to the pin 7 and is used to place the pin 7 removed from the socket 5 and the slot 6.
[0086] Specifically, the placement slot 8 is located below the slot 6.
[0087] Based on the structure of this embodiment, the locking and unlocking of the anti-misalignment structure are as follows:
[0088] Anti-misoperation locking structure: The stop lever rotates around the pivot 4. Then, the end of the stop lever with the insertion hole 5 rotates until the insertion hole 5 is axially aligned with the slot 6. Next, the pin 7 is removed from the placement groove 8, passes through the insertion hole 5, and inserted into the slot 6, thus horizontally fixing the stop lever. Figure 3 As shown, if the circuit breaker is closed at this time, handle 2 will touch the stop lever and be blocked, making it impossible to close the circuit breaker.
[0089] Unlocking the anti-misoperation structure: When it is necessary to close the circuit, remove the pin 7 from the socket 5 and slot 6 and place it in the placement slot 8. The stop lever will naturally rotate downward under the action of gravity through the rotating shaft 4 to a position perpendicular to the handle 2, and the air switch can be closed normally.
[0090] In a preferred embodiment, the horizontal height of the insertion end of the placement slot 8 is not lower than the horizontal height of the tail end, ensuring that the pin 7 can be stably placed in the placement slot 8.
[0091] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.
Claims
1. An air switch designed to prevent accidental closure, characterized in that, It includes a switch body and an anti-misoperation structure, wherein the anti-misoperation structure includes a stop bar and a pin; One end of the stop lever is provided with a rotating shaft, and the stop lever is rotatably connected to the switch body through the rotating shaft; The other end of the stop lever is detachably connected to the switch body. When the two ends of the stop lever are respectively placed at the rotatable connection point and the detachable connection point with the switch body, they are located on the opening and closing rotation path of the switch body.
2. The air switch for preventing accidental closing according to claim 1, characterized in that, The end of the rotating shaft is provided with a limiting head, the size of which is larger than the diameter of the rotating shaft.
3. The air switch for preventing accidental closing according to claim 2, characterized in that, The rotating shaft is fixedly connected to the switch body, and the stop lever is rotatably connected to the rotating shaft.
4. The air switch for preventing accidental closing according to claim 3, characterized in that, At the rotatable connection between the stop bar and the rotating shaft, a through hole and a groove are provided on the side away from the switch body. The groove diameter is larger than the through hole diameter. The rotating shaft passes through the through hole, and the limiting head is placed in the groove.
5. The air switch for preventing accidental closing according to claim 4, characterized in that, The top of the rotating shaft is provided with an axial threaded hole, and the limiting head is screwed into the threaded hole through a protrusion with external threads, and is detachably connected to the rotating shaft.
6. The air switch for preventing accidental closing according to claim 2, characterized in that, The other end of the rotating shaft relative to the limiting head is vertically and fixedly connected to the stop rod. The switch body is provided with a rotating hole, which is a slot structure formed by two cylindrical grooves of different diameters superimposed. The end of the rotating shaft where the limiting head is located is placed in the rotating hole and is rotatably connected relative to the switch body.
7. The air switch for preventing accidental closing according to any one of claims 1-6, characterized in that, The end of the stop bar that is detachably connected to the switch body is provided with a through hole, and the switch body is provided with a slot, the through hole and the slot having the same axial direction.
8. The air switch for preventing accidental closing according to claim 7, characterized in that, The insertion end of the socket and the slot is at a higher level than the tail.
9. The air switch for preventing accidental closing according to claim 8, characterized in that, The switch body is also provided with a placement slot, which is adapted to the pin.
10. The air switch for preventing accidental closing according to claim 9, characterized in that, The horizontal height of the insertion end of the placement slot is not lower than the horizontal height of the tail.