A manual tripping device for a 1.5kV DC circuit breaker
By designing a manual tripping device that includes a connecting plate, crank arm, rotating rod, and limit rod, the problem of the lack of a locking structure in traditional 1.5kV DC circuit breakers is solved, achieving convenient and safe operation, ensuring stable positioning of the pin, and reducing wear and the risk of misoperation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI TONGYONG ELECTRIC SWITCHES CO LTD
- Filing Date
- 2025-01-23
- Publication Date
- 2026-05-26
AI Technical Summary
Traditional 1.5kV DC circuit breakers lack an effective locking structure, which leads to inconvenience in operation and safety hazards, especially in case of misoperation, which may cause equipment failure.
A manual release device was designed, comprising components such as a connecting plate, a crank arm, a rotating rod, a limiting rod, and a pin. By using the limiting effect of the card and the pin, combined with the operation of rotating the rotating rod and pulling the rod, the connecting plate can be locked and unlocked, ensuring stable positioning of the pin and avoiding friction and wear.
It improves the convenience and safety of manual tripping operation, prevents the pin from coming off, reduces wear, facilitates maintenance and replacement, and enhances the reliability of the equipment.
Smart Images
Figure CN224288131U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of DC circuit breaker technology, and more particularly to a manual tripping device for a 1.5kV DC circuit breaker. Background Technology
[0002] DC circuit breakers in DC systems can conduct, carry, and interrupt normal circuit current within a specified time. Unlike AC systems, DC systems do not have a natural zero-crossing point, and DC lines have low inductance, resulting in a rapid rise in fault current. Therefore, shutting down DC faults is more difficult, and manual tripping devices are required during operation. Traditional manual control of DC circuit breakers lacks an effective locking structure, leading to inconvenience and safety hazards during use, especially as operator error can cause equipment failure.
[0003] Therefore, a manual tripping device with reliable locking function is needed to improve the safety and convenience of operating 1.5kV DC circuit breakers. Utility Model Content
[0004] In view of the shortcomings of the prior art, this utility model provides a manual tripping device for a 1.5kV DC circuit breaker, which overcomes the shortcomings of the prior art and aims to solve the problems in the background art.
[0005] To achieve the above objectives, this application adopts the following technical solution: a manual tripping device for a 1.5kV DC circuit breaker, comprising a connecting plate one and a connecting plate two, wherein the outer sides of both connecting plate one and connecting plate two are rotatably connected to crank arms via rotating shafts, and rotating rods are inserted into the inner walls of the crank arms. The bottoms of connecting plate one and connecting plate two are rotatably connected to the middle position of manual tripping drive block one and manual tripping drive block two, and a manual tripping drive block three is fixedly connected to the outer side of manual tripping drive block two, the manual tripping drive block three being located away from the manual tripping device. A round tube is fixedly installed on one side of the drive block two. A card is fixedly installed on the inner wall of the round tube. A manual release drive shaft is rotatably connected to the inner wall of the round tube. An insertion hole is opened on the inner wall of the manual release drive shaft. A pin is inserted into the inner wall of the insertion hole. A positioning disc is fixedly connected to the inner cavity of the manual release drive shaft. One end of a return spring is fixedly connected to the bottom of the positioning disc. A limit bead is fixedly connected to the other end of the return spring. A pull rod is fixedly connected to the outer edge of the limit bead. A hook is fixedly connected to the top of the pull rod.
[0006] In a preferred embodiment, a limit rod is fixedly installed on the inner wall of the rotating rod, and a through hole adapted to the shape of the rotating rod is opened on the inner wall of the crank arm, and the rotating rod is inserted into the inner wall of the through hole.
[0007] By adopting the above technical solution, the user's convenience in rotating the lever is increased, which in turn facilitates the rotation of the lever to drive the crank arm to rotate and adjust the connecting plate one and the connecting plate two to the locked position.
[0008] In a preferred embodiment, a positioning rod is provided at the middle position of the connecting plate one and the connecting plate two, and a limiting rod two is fixedly installed on the inner wall of the positioning rod. The end of the positioning rod away from the limiting rod two is fixedly connected to the DC circuit breaker.
[0009] By adopting the above technical solution, the positioning rod can be used to separate connecting plate one and connecting plate two, ensuring that they do not interfere with each other during closure.
[0010] In a preferred embodiment, the top of the manual release drive shaft is provided with a receiving hole, and the hook is disposed on the inner wall of the receiving hole.
[0011] By adopting the above technical solution, users can use auxiliary tools to drag the hook and use the pull rod to move the limit ball upward, which makes it easy to adjust the position of the limit ball. At the same time, the receiving hole ensures that the hook is not directly exposed and will not affect the normal operation of the manual release drive shaft.
[0012] In a preferred embodiment, the outer edge of the pin is provided with an arc groove, and the limiting bead is disposed on the inner wall of the arc groove.
[0013] By adopting the above technical solution, the pin can be stably positioned on the inner wall of the socket using the limiting bead, thereby ensuring that the pin will not easily detach from the inner wall of the socket.
[0014] In a preferred embodiment, the bottom of the receiving hole is provided with a sliding hole that communicates with the inner cavity of the manual release drive shaft, and the pull rod is slidably connected to the inner wall of the positioning disc.
[0015] By adopting the above technical solution, the hook can adjust the pull rod to slide on the inner wall of the positioning disc, thereby dragging the limiting bead upward to move away from the inner wall of the arc groove, so that the pin can be easily removed to the outside for inspection and maintenance.
[0016] In a preferred embodiment, a round rod is fixedly installed on the inner wall of the manual release drive shaft.
[0017] By adopting the above technical solution, the manual release drive shaft can be limited, ensuring that it will not easily disengage from its position.
[0018] In a preferred embodiment, the length of the pin is adapted to the inner diameter of the circular tube.
[0019] By adopting the above technical solution, the pin cannot move arbitrarily when it is in the outer position of the card, but can rotate on the inner wall of the tube when the pin is misaligned with the card.
[0020] The beneficial effects of this application are:
[0021] 1. This manual tripping device for a 1.5kV DC circuit breaker uses a card to limit the pin, ensuring the device is locked. Then, by rotating the limiting rod, the rotating rod and crank arm rotate, which in turn rotates the connecting plate and the connecting plate, thus causing the pin and the card to be misaligned. This allows the pin to enter the inner cavity of the circular tube, avoiding the problems of existing manual opening and closing controls lacking a locking structure, which cause many inconveniences during use.
[0022] 2. This manual tripping device for a 1.5kV DC circuit breaker allows the limit bead to be moved upward by a lever using an auxiliary tool to drag the hook, thereby pulling the limit bead upward and disengaging it from the inner wall of the arc groove. This facilitates the removal of the pin for external maintenance and replacement, preventing excessive wear on both sides of the pin and affecting its normal use, thus improving the convenience of replacement. Attached Figure Description
[0023] Figure 1 This is a three-dimensional structural diagram of the present application;
[0024] Figure 2 This is a partially enlarged structural schematic diagram of this application;
[0025] Figure 3 This is a partial enlarged structural diagram of this application.
[0026] The following are the labels in the diagram: 1. Connecting plate one; 2. Connecting plate two; 3. Rotating shaft; 4. Crank arm; 5. Rotating rod; 6. Limiting rod one; 7. Positioning rod; 8. Limiting rod two; 9. Manual release drive block one; 10. Manual release drive block two; 11. Manual release drive block three; 12. Round tube; 13. Card; 14. Manual release drive shaft; 15. Round rod; 16. Insertion hole; 17. Pin; 18. Positioning disc; 19. Return spring; 20. Limiting bead; 21. Hook; 22. Receiving hole; 23. Pull rod. Detailed Implementation
[0027] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments.
[0028] Reference Figure 1-3A manual tripping device for a 1.5kV DC circuit breaker includes a connecting plate 1 and a connecting plate 2. Both connecting plates 1 and 2 are rotatably connected to a crank arm 4 via a rotating shaft 3. A rotating rod 5 is inserted into the inner wall of the crank arm 4. The bottoms of connecting plates 1 and 2 are rotatably connected to the middle position of a manual tripping drive block 1 9 and a manual tripping drive block 2 10. A manual tripping drive block 3 11 is fixedly connected to the outer side of the manual tripping drive block 2 10. A circular tube 1 is fixedly installed on the side of the manual tripping drive block 3 11 away from the manual tripping drive block 2 10. 2. A card 13 is fixedly installed on the inner wall of the round tube 12. A manual release drive shaft 14 is rotatably connected to the inner wall of the round tube 12. An insertion hole 16 is opened on the inner wall of the manual release drive shaft 14. A pin 17 is inserted into the inner wall of the insertion hole 16. A positioning disc 18 is fixedly connected to the inner cavity of the manual release drive shaft 14. One end of a return spring 19 is fixedly connected to the bottom of the positioning disc 18. A limit bead 20 is fixedly connected to the other end of the return spring 19. A pull rod 23 is fixedly connected to the outer edge of the limit bead 20. A hook 21 is fixedly connected to the top of the pull rod 23.
[0029] See Figure 1 and Figure 2 A limit rod 6 is fixedly installed on the inner wall of the rotating rod 5. A through hole adapted to the shape of the rotating rod 5 is opened on the inner wall of the crank arm 4. The rotating rod 5 is inserted into the inner wall of the through hole, which increases the convenience for the user to rotate the rotating rod 5. This facilitates the rotation of the rotating rod 5 to drive the crank arm 4 to rotate and adjust the connecting plate 1 and connecting plate 2 to the locked position.
[0030] See Figure 1 and Figure 2 A positioning rod 7 is provided in the middle of the connecting plate 1 and the connecting plate 2. A limiting rod 2 8 is fixedly installed on the inner wall of the positioning rod 7. The end of the positioning rod 7 away from the limiting rod 2 8 is fixedly connected to the DC circuit breaker, so that the positioning rod 7 can be used to separate the connecting plate 1 and the connecting plate 2, ensuring that they will not interfere with each other when closed.
[0031] See Figure 3 The top of the manual release drive shaft 14 is provided with a receiving hole 22, and the hook 21 is set in the inner wall of the receiving hole 22. This allows the user to use an auxiliary tool to drag the hook 21 and use the pull rod 23 to drive the limit bead 20 to move upward, thereby facilitating the adjustment of the position of the limit bead 20. At the same time, the receiving hole 22 ensures that the hook 21 is not directly exposed, thus ensuring that it will not affect the normal operation of the manual release drive shaft 14.
[0032] See Figure 3 The outer edge of the pin 17 is provided with an arc groove, and the limiting bead 20 is provided on the inner wall of the arc groove, so that the pin 17 can be stably positioned on the inner wall of the socket 16 by the limiting bead 20, thereby ensuring that the pin 17 will not easily disengage from the inner wall of the socket 16.
[0033] See Figure 3 The bottom of the receiving hole 22 is provided with a sliding hole that communicates with the inner cavity of the manual release drive shaft 14. The pull rod 23 is slidably connected to the inner wall of the positioning disc 18, so that the hook 21 can adjust the pull rod 23 to slide on the inner wall of the positioning disc 18, thereby dragging the limit bead 20 upward to move away from the inner wall of the arc groove, so that the pin 17 can be easily removed to the outside for inspection and maintenance.
[0034] See Figure 2 and Figure 3 A round rod 15 is fixedly installed on the inner wall of the manual release drive shaft 14, which can limit the manual release drive shaft 14 and ensure that it will not easily disengage from the position.
[0035] See Figure 2 and Figure 3 The length of the pin 17 is adapted to the inner diameter of the tube 12, so that the pin 17 cannot move freely when it is in the outer position of the card 13, but can rotate on the inner wall of the tube 12 when the pin 17 and the card 13 are misaligned.
[0036] Working principle: When using this device, the card 13 first acts as a limit to the pin 17, ensuring that the device is locked. Then, by rotating the limiting rod 6, the rotating rod 5 and the crank arm 4 are rotated, which in turn drives the connecting plate 1 and the connecting plate 2 to rotate, thereby causing the pin 17 and the card 13 to be misaligned. This allows the pin 17 to enter the inner cavity of the round tube 12. The limiting bead 20 is engaged with the inner wall of the arc groove, which can stably position the pin 17 in the inner wall of the insertion hole 16. By using the auxiliary tool to drag the hook 21, the pull rod 23 can be used to move the limiting bead 20 upward, thereby dragging the limiting bead 20 upward and removing it from the inner wall of the arc groove. This makes it easy to remove the pin 17 for maintenance and replacement, avoiding excessive wear on both sides of the pin 17, which would affect its normal use and improve the convenience of replacement.
[0037] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," and "the other end," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not 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 this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0038] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0039] The present invention has been described above with reference to specific embodiments. However, those skilled in the art should understand that these descriptions are exemplary and not intended to limit the scope of protection of the present invention. Those skilled in the art can make various modifications and variations to the present invention based on its spirit and principles, and these modifications and variations are also within the scope of the present invention.
Claims
1. A manual tripping device for a 1.5kV DC circuit breaker, comprising a first connecting plate (1) and a second connecting plate (2), characterized in that, Both connecting plate one (1) and connecting plate two (2) are rotatably connected to a crank arm (4) via a pivot (3) on their outer sides. A rotating rod (5) is inserted into the inner wall of the crank arm (4). The bottom of connecting plate one (1) and connecting plate two (2) is rotatably connected to the middle position of manual release drive block one (9) and manual release drive block two (10). A manual release drive block three (11) is fixedly connected to the outer side of manual release drive block two (10). A round tube (12) is fixedly installed on the side of manual release drive block three (11) away from manual release drive block two (10). A card (13) is fixedly installed on the inner wall of the round tube (12). The inner wall of the round tube (12) is rotatably connected to a manual release drive shaft (14). The inner wall of the manual release drive shaft (14) is provided with an insertion hole (16). A pin (17) is inserted into the inner wall of the insertion hole (16). A positioning disc (18) is fixedly connected to the inner cavity of the manual release drive shaft (14). One end of a reset spring (19) is fixedly connected to the bottom of the positioning disc (18). A limit bead (20) is fixedly connected to the other end of the reset spring (19). A pull rod (23) is fixedly connected to the outer edge of the limit bead (20). A hook (21) is fixedly connected to the top of the pull rod (23). A positioning rod (7) is provided at the middle position of the connecting plate 1 (1) and the connecting plate 2 (2). A limiting rod 2 (8) is fixedly installed on the inner wall of the positioning rod (7). The end of the positioning rod (7) away from the limiting rod 2 (8) is fixedly connected to the DC circuit breaker. The top of the manual release drive shaft (14) is provided with a receiving hole (22), and the hook (21) is provided on the inner wall of the receiving hole (22).
2. The manual tripping device for a 1.5kV DC circuit breaker according to claim 1, characterized in that, The inner wall of the rotating rod (5) is fixedly installed with a limiting rod (6), and the inner wall of the crank arm (4) is provided with a through hole that matches the shape of the rotating rod (5). The rotating rod (5) is inserted into the inner wall of the through hole.
3. A manual tripping device for a 1.5kV DC circuit breaker according to claim 1, characterized in that, The outer edge of the pin (17) is provided with an arc groove, and the limiting bead (20) is disposed on the inner wall of the arc groove.
4. A manual tripping device for a 1.5kV DC circuit breaker according to claim 1, characterized in that, The bottom of the receiving hole (22) is provided with a sliding hole that communicates with the inner cavity of the manual release drive shaft (14), and the pull rod (23) is slidably connected to the inner wall of the positioning disc (18).
5. A manual tripping device for a 1.5kV DC circuit breaker according to claim 1, characterized in that, A round rod (15) is fixedly installed on the inner wall of the manual release drive shaft (14).
6. A manual tripping device for a 1.5kV DC circuit breaker according to claim 1, characterized in that, The length of the pin (17) is adapted to the inner diameter of the round tube (12).