Interlocking device of vacuum circuit breaker

Abstract

The invention relates to the technical field of vacuum circuit breakers, and particularly discloses an interlocking device of a vacuum circuit breaker, which comprises a circuit breaker main body, and one end of the circuit breaker main body is provided with an operating lever I and an operating lever II; the locking mechanism is located in the circuit breaker main body, and the locking mechanism can lock the first operating rod; and the interlocking mechanism is located in the circuit breaker main body, and the interlocking mechanism can interlock the operating rod II when the locking mechanism locks the operating rod I. When the interlocking mechanism is used, the operating rod I of the circuit breaker main body is pushed to switch on the circuit breaker main body, the operating rod I locks the operating rod I through the locking mechanism, and the operating rod II is locked through the interlocking mechanism. Meanwhile, the second operating rod is interlocked through the interlocking mechanism, it is ensured that when the first operating rod is pushed to enable the circuit breaker body to be switched on, the second operating rod cannot conduct switching-on operation, the using safety of the circuit breaker is improved, and safe and stable operation of an electrical system and related equipment is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of vacuum circuit breakers, in particular to an interlocking device for a vacuum circuit breaker. Background Art

[0002] A circuit breaker is a switching device that can close, carry and interrupt current under normal circuit conditions, and can close, carry and interrupt current under abnormal circuit conditions within a specified time. When the circuit is operating normally, it can control the on and off of the circuit like an ordinary switch; when a circuit fault occurs, it can quickly and automatically cut off the circuit to prevent the fault from expanding and protect electrical equipment and personal safety.

[0003] Circuit breakers are divided into automatic and manual operations according to their operation mode. Among them, manually operated circuit breakers rely entirely on manual operation when closing. Especially when multiple circuit breaker states need to be switched simultaneously or quickly, manual operation is prone to misoperation, such as closing two or more operating levers at the same time, which may lead to serious consequences such as circuit overload and short circuit. Therefore, this paper proposes an interlocking device for vacuum circuit breakers. Summary of the Invention

[0004] The object of the present invention is to provide an interlocking device for a vacuum circuit breaker to solve the problem raised in the above-mentioned background art that manual operation is completely dependent on manual operation, especially when multiple circuit breaker states need to be switched simultaneously or quickly. Manual operation is prone to misoperation, such as closing two or more operating levers at the same time, which may lead to serious consequences such as circuit overload and short circuit.

[0005] To achieve the above object, the present invention provides the following technical solution: an interlocking device for a vacuum circuit breaker, comprising a circuit breaker body, wherein a first operating lever and a second operating lever are provided at one end of the circuit breaker body; A locking mechanism, located inside the circuit breaker body, capable of locking the operating lever; An interlocking mechanism is located inside the circuit breaker body and can interlock the second operating lever when the locking mechanism locks the first operating lever.

[0006] Wherein, the locking mechanism includes a connecting rod provided at one end of the operating rod, the operating rod is fixedly connected to the connecting rod, the connecting rod is located inside the circuit breaker body, and a ratchet is fixedly connected to the outer wall of the connecting rod.

[0007] Among them, a fixed block is provided under the ratchet, one end of the fixed block is fixedly connected to a locking rod, the outer wall of the locking rod is fixedly connected to a torsion spring 1, the end of the torsion spring 1 away from the locking rod is fixedly connected to a pawl, the pawl is rotatably connected to the locking rod, and the pawl is clamped with the ratchet.

[0008] A fixing plate is fixedly connected to the inner wall of the circuit breaker body, a spring is fixedly connected to the upper end of the fixing plate, and one end of the spring away from the fixing plate is fixedly connected to the fixing block.

[0009] Wherein, a rope hole is provided on one side of the fixing block, and the rope hole is L-shaped.

[0010] Wherein, a rope is fixedly connected to the bottom of the fixing block, the rope is located in the center of the spring, and the rope passes through the rope hole and is slidably connected to the rope hole.

[0011] The outer wall of the joystick is fixedly connected to a torsion spring 2, the end of the torsion spring 2 away from the joystick is fixedly connected to a rotating ring, and the end of the rope away from the fixed block is wrapped around the outer periphery of the rotating ring and fixedly connected to the rotating ring.

[0012] The interlocking mechanism includes an interlocking plate fixedly connected to the inner wall of the circuit breaker body, the interlocking plate is fixedly connected to a connecting ring at one end away from the circuit breaker body, a transmission cylinder is rotatably connected inside the connecting ring, and the transmission cylinder is fixedly connected to a transmission gear at one end away from the connecting ring.

[0013] Wherein, the connecting rod is far away from the operating rod and is fixedly connected to a driving gear at one end, and the transmission gear is engaged with the driving gear.

[0014] Wherein, a screw rod is provided inside the transmission cylinder, the screw rod is threadedly connected to the transmission cylinder, and an interlocking rod is fixedly connected to one end of the screw rod close to the operating rod.

[0015] The present invention has at least the following beneficial effects: When the present invention is in use, when the operating lever 1 of the circuit breaker body is pushed to close the circuit breaker body, the operating lever 1 is locked by the locking mechanism, and the operating lever 2 is interlocked by the interlocking mechanism, ensuring that when the operating lever 1 is pushed to close the circuit breaker body, the operating lever 2 cannot be closed, thereby improving the safety of circuit breaker use and ensuring the safe and stable operation of the electrical system and related equipment. And to pull down the operating lever, you only need to turn the rotating ring and pull it to open the locking mechanism and release the interlocking mechanism at the same time. This unlocking method greatly simplifies the operation process, reduces the operating steps, improves the operating efficiency, and enables the operator to complete the circuit breaker operation more quickly and conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall structure of the circuit breaker of the present invention; Figure 2 This is a schematic diagram of the back structure of the circuit breaker of the present invention; Figure 3 This is a schematic cross-sectional view of the circuit breaker of the present invention; Figure 4Schematic diagram of the overall structure of the locking mechanism of the present invention; Figure 5 For the present invention Figure 4 Schematic diagram of the enlarged structure of area A; Figure 6 This is a schematic diagram of the cross-sectional structure of the fixing block of the present invention; Figure 7 It is a schematic diagram of the cross-sectional structure of the rotating ring of the present invention.

[0017] In the figure: 1. Circuit breaker body; 11. Operating lever 1; 12. Operating lever 2; 2. Locking mechanism; 21. Connecting rod; 22. Ratchet; 23. Fixed block; 24. Locking rod; 25. Torsion spring 1; 26. Ratchet; 27. Fixed plate; 28. Spring; 29. ​​Rope hole; 210. Rope; 211. Torsion spring 2; 212. Rotating ring; 3. Interlocking mechanism; 31. Interlocking plate; 32. Connecting ring; 33. Transmission cylinder; 34. Transmission gear; 35. Drive gear; 36. Screw; 37. Interlocking rod. DETAILED DESCRIPTION

[0018] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0019] See also Figure 1-Figure 7 The present invention provides a technical solution: an interlocking device for a vacuum circuit breaker, comprising a circuit breaker body 1, wherein one end of the circuit breaker body 1 is provided with a joystick 11 and a joystick 2 12; A locking mechanism 2, located inside the circuit breaker body 1, capable of locking the operating lever 11; An interlocking mechanism 3, located inside the circuit breaker body 1, capable of interlocking the operating lever 2 12 when the locking mechanism 2 locks the operating lever 11; When the present invention is in use, when the operating lever 11 of the circuit breaker body 1 is pushed to close the circuit breaker body 1, the operating lever 11 is locked by the locking mechanism 2, and the operating lever 2 12 is interlocked by the interlocking mechanism 3. This ensures that when the operating lever 11 is pushed to close the circuit breaker body 1, the operating lever 2 12 cannot perform the closing operation, thereby improving the safety of the circuit breaker and ensuring the safe and stable operation of the electrical system and related equipment. And when pulling down the operating lever 11, it is only necessary to rotate the rotating ring 212 and pull it to open the locking mechanism 2 and release the interlocking mechanism 3 at the same time. This unlocking method greatly simplifies the operation process, reduces the operating steps, improves the operating efficiency, and enables the operator to complete the circuit breaker operation more quickly and conveniently.

[0020] The locking mechanism 2 includes a connecting rod 21 provided at one end of the operating rod 11, the operating rod 11 is fixedly connected to the connecting rod 21, the connecting rod 21 is located inside the circuit breaker body 1, and a ratchet 22 is fixedly connected to the outer wall of the connecting rod 21; A fixing block 23 is provided below the ratchet 22, one end of the fixing block 23 is fixedly connected to a locking rod 24, an outer wall of the locking rod 24 is fixedly connected to a torsion spring 25, an end of the torsion spring 25 away from the locking rod 24 is fixedly connected to a pawl 26, the pawl 26 is rotatably connected to the locking rod 24, and the pawl 26 is engaged with the ratchet 22; A fixing plate 27 is fixedly connected to the inner wall of the circuit breaker body 1, a spring 28 is fixedly connected to the upper end of the fixing plate 27, and the end of the spring 28 away from the fixing plate 27 is fixedly connected to the fixing block 23; A rope hole 29 is provided on one side of the fixing block 23, and the rope hole 29 is L-shaped; The bottom of the fixing block 23 is fixedly connected with a rope 210, the rope 210 is located in the center of the spring 28, and the rope 210 passes through the rope hole 29 and is slidably connected to the rope hole 29; The outer wall of the joystick 11 is fixedly connected to a torsion spring 211, and the end of the torsion spring 211 away from the joystick 11 is fixedly connected to a rotating ring 212. The end of the rope 210 away from the fixed block 23 is wrapped around the outer periphery of the rotating ring 212 and is fixedly connected to the rotating ring 212. When the circuit breaker body 1 is closed, the operating lever 11 is pushed, and the operating lever 11 drives the ratchet 22 to rotate through the connecting rod 21. The pawl 26 located below the ratchet 22 engages the ratchet 22 until the operating lever 11 is rotated into place. When the ratchet 22 rotates, the pawl 26 rotates around the locking rod 24, and the torsion spring 1 25 accumulates force. When the ratchet 22 passes the pawl 26, the torsion spring 1 25 pulls the pawl 26 back and re-engages the ratchet 22, thereby locking the ratchet 22 and prohibiting reverse rotation. After the pawl 26 engages the ratchet 22, it can lock the ratchet 22 to prevent the connecting rod 21 from rotating, and prevent the circuit breaker from accidentally opening due to the rotation of the connecting rod 21, and avoid malfunction caused by vibration or external force. Moreover, the pawl 26 can accurately engage the tooth groove of the ratchet 22, and cooperate with the accumulation and release of the torsion spring 1 25 to make the locking state tight and stable. When the joystick 11 needs to be pulled down, the rotating ring 212 is rotated first, and the rotating ring 212 rotates around the joystick 11. At this time, the torsion spring 211 stores force, and at the same time, the rope 210 located outside the rotating ring 212 is wound around the rotating ring 212. The rope 210 slides in the rope hole 29. Since the rope hole 29 is L-shaped, the end of the rope 210 is located at the lower end of the fixed block 23. When the rotating ring 212 is wound around the rope 210, the rope 210 can pull the fixed block 23 downward. At this time, the spring 28 stores force. The force is applied, and the pawl 26 at the upper end of the fixed rod is disengaged from the ratchet 22. At this time, the ratchet 22 and the connecting rod 21 can rotate. At this time, pulling down the operating lever 11 can control the closing and opening of the circuit breaker body 1. The opening and closing operations are simple and convenient. The linkage mechanism simplifies the operation process, reduces the difficulty of operation and the risk of error. At the same time, the pre-action of the rotating ring 212 ensures that the pawl 26 is disengaged before operation, avoiding mechanical obstruction or impact that may occur when the rod is directly pulled, making the operation smoother and more reliable. In actual use, operators can complete the closing, opening and unlocking of the circuit breaker without complicated operations, saving time, improving work efficiency, reducing the probability of accidents caused by operational errors, and ensuring operational safety; for the electrical system, the locking mechanism 2 ensures the stability of the circuit breaker after closing, reduces equipment damage and power outages caused by accidental operation of the circuit breaker, ensures the normal operation of the system, reduces maintenance costs and economic losses caused by power outages, and the compact structural design makes the circuit breaker installation more flexible and can adapt to different installation environments.

[0021] The interlocking mechanism 3 includes an interlocking plate 31 fixedly connected to the inner wall of the circuit breaker body 1. The end of the interlocking plate 31 away from the circuit breaker body 1 is fixedly connected to a connecting ring 32. The connecting ring 32 is internally connected to a transmission cylinder 33 for rotation. The end of the transmission cylinder 33 away from the connecting ring 32 is fixedly connected to a transmission gear 34. The connecting rod 21 is fixedly connected to a driving gear 35 at one end away from the operating lever 11, and the transmission gear 34 is engaged with the driving gear 35; A screw rod 36 is provided inside the transmission cylinder 33, and the screw rod 36 is threadedly connected to the transmission cylinder 33. An interlocking rod 37 is fixedly connected to one end of the screw rod 36 near the operating rod 2 12; When the operating lever 11 is pushed, the operating lever 11 drives the connecting rod 21 to rotate, and the driving gear 35 at the end of the connecting rod 21 can drive the transmission gear 34 to rotate. At this time, the transmission gear 34 drives the transmission cylinder 33 located inside the connecting ring 32 to rotate. When the transmission cylinder 33 rotates, the screw rod 36 located inside the connecting ring 32 rotates and moves towards the operating lever 2 12. The interlocking rod 37 at the end of the screw rod 36 engages the operating lever 2 12 to prevent the operating lever 2 12 from closing, and cooperates with the locking mechanism 2 to achieve interlocking of the operating lever 11 and the operating lever 2 12. When the joystick 11 is pushed to close the switch, the interlocking rod 37 engages the joystick 2 12, effectively preventing the joystick 2 12 from closing at the same time. In an electrical system, closing two joysticks at the same time can cause abnormal current, leading to serious faults such as overload and short circuit, and even damage to electrical equipment and fire. The interlocking mechanism 3 prevents this dangerous situation from happening through the interlocking rod 37, thereby ensuring the safety of the electrical system and operators. In addition, in actual operation, operators may operate the two joysticks at the same time due to negligence or misjudgment. The existence of the interlocking mechanism 3 prevents such misoperation, thereby reducing the probability of safety accidents caused by human error. After the two joysticks are interlocked, electrical accidents such as overload and short circuit caused by the simultaneous closing of the two joysticks can be eliminated. In scenarios such as factory power distribution, the risk of equipment line burning and fire can be avoided; it can also prevent operators from being injured by electric shock and arc damage due to misoperation, and at the same time ensure the continuous and stable operation of the power system in places with high requirements for power supply stability; it reduces the mechanical shock and vibration caused by the simultaneous closing of the two joysticks, extends the service life of the equipment, and can reduce the risk of damage to the circuit breaker body 1 due to misoperation, reduce the occurrence rate of failures, save spare parts and labor maintenance costs; reduce the number of equipment shutdowns, and reduce the indirect losses caused by shutdowns.

[0022] The working principle and use process of the present invention: When the circuit breaker body 1 is closed, the operating lever 11 is pushed, and the operating lever 11 drives the ratchet 22 to rotate through the connecting rod 21. The pawl 26 located below the ratchet 22 engages the ratchet 22 until the operating lever 11 is rotated into place. When the ratchet 22 rotates, the pawl 26 rotates around the locking rod 24, and the torsion spring 25 accumulates force. When the ratchet 22 passes the pawl 26, the torsion spring 25 pulls the pawl 26 back and re-engages the ratchet 22, thereby locking the ratchet 22 and prohibiting the circuit breaker from being closed. For the purpose of reverse rotation, the pawl 26 can lock the ratchet 22 after engaging the ratchet 22, thereby preventing the connecting rod 21 from rotating. When the circuit breaker body 1 is opened, the rotating ring 212 is rotated first, and the rotating ring 212 rotates around the operating rod 11. At this time, the torsion spring 211 accumulates force, and at the same time, the rope 210 located outside the rotating ring 212 is wound around the rotating ring 212. The rope 210 slides in the rope hole 29. Since the rope hole 29 is L-shaped, the rope 210 The end is located at the lower end of the fixed block 23. When the rotating ring 212 is wrapped around the rope 210, the rope 210 can pull the fixed block 23 downward. At this time, the spring 28 accumulates force, and the pawl 26 at the upper end of the fixed rod is disengaged from the ratchet 22. At this time, the ratchet 22 and the connecting rod 21 can rotate. At this time, pulling down the operating lever 11 can control the closing and opening of the circuit breaker body 1. When pushing the operating lever 11, the operating lever 11 drives the connecting rod 21 to rotate, and the driving gear 35 at the end of the connecting rod 21 can drive the transmission gear 34 to rotate. At this time, the transmission gear 34 drives the transmission cylinder 33 to rotate inside the connecting ring 32. When the transmission cylinder 33 rotates, the screw rod 36 inside the connecting ring 32 rotates and moves towards the operating rod 2 12. The interlocking rod 37 at the end of the screw rod 36 engages the operating rod 2 12 to prevent the operating rod 2 12 from closing, and cooperates with the locking mechanism 2 to achieve interlocking of the operating lever 11 and the operating lever 2 12.

[0023] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0024] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An interlocking device for a vacuum circuit breaker, comprising: A circuit breaker body (1), wherein one end of the circuit breaker body (1) is provided with a first operating lever (11) and a second operating lever (12); It is characterized by further comprising: A locking mechanism (2), the locking mechanism (2) being located inside the circuit breaker body (1), and the locking mechanism (2) being capable of locking the operating lever (11); An interlocking mechanism (3) is located inside the circuit breaker body (1), and the interlocking mechanism (3) can interlock the second operating lever (12) when the locking mechanism (2) locks the first operating lever (11).

2. The interlocking device of a vacuum circuit breaker according to claim 1, characterized in that: The locking mechanism (2) comprises a connecting rod (21) provided at one end of an operating rod (11), the operating rod (11) being fixedly connected to the connecting rod (21), the connecting rod (21) being located inside the circuit breaker body (1), and a ratchet (22) being fixedly connected to the outer wall of the connecting rod (21).

3. The interlocking device of a vacuum circuit breaker according to claim 2, characterized in that: A fixing block (23) is provided below the ratchet (22), one end of the fixing block (23) is fixedly connected to a locking rod (24), an outer wall of the locking rod (24) is fixedly connected to a torsion spring (25), an end of the torsion spring (25) away from the locking rod (24) is fixedly connected to a pawl (26), the pawl (26) is rotatably connected to the locking rod (24), and the pawl (26) is engaged with the ratchet (22).

4. The interlocking device of a vacuum circuit breaker according to claim 3, characterized in that: A fixing plate (27) is fixedly connected to the inner wall of the circuit breaker body (1), a spring (28) is fixedly connected to the upper end of the fixing plate (27), and the end of the spring (28) away from the fixing plate (27) is fixedly connected to the fixing block (23).

5. The interlocking device of a vacuum circuit breaker according to claim 4, characterized in that: A rope hole (29) is provided on one side of the fixing block (23), and the rope hole (29) is L-shaped.

6. The interlocking device of a vacuum circuit breaker according to claim 5, characterized in that: A rope (210) is fixedly connected to the bottom of the fixed block (23), and the rope (210) is located in the center of the spring (28). The rope (210) passes through the rope hole (29) and is slidably connected to the rope hole (29).

7. The interlocking device of a vacuum circuit breaker according to claim 6, characterized in that: The outer wall of the joystick 1 (11) is fixedly connected to a torsion spring 2 (211), and one end of the torsion spring 2 (211) away from the joystick 1 (11) is fixedly connected to a rotating ring (212), and one end of the rope (210) away from the fixed block (23) is wound around the outer periphery of the rotating ring (212) and is fixedly connected to the rotating ring (212).

8. The interlocking device of a vacuum circuit breaker according to claim 2, characterized in that: The interlocking mechanism (3) comprises an interlocking plate (31) fixedly connected to the inner wall of the circuit breaker body (1); an end of the interlocking plate (31) away from the circuit breaker body (1) is fixedly connected to a connecting ring (32); a transmission cylinder (33) is rotatably connected inside the connecting ring (32); and an end of the transmission cylinder (33) away from the connecting ring (32) is fixedly connected to a transmission gear (34).

9. The interlocking device of a vacuum circuit breaker according to claim 8, characterized in that: The connecting rod (21) is fixedly connected to a driving gear (35) at one end away from the operating rod (11), and the transmission gear (34) is meshed with the driving gear (35).

10. The interlocking device of a vacuum circuit breaker according to claim 8, characterized in that: A screw rod (36) is provided inside the transmission cylinder (33), and the screw rod (36) is threadedly connected to the transmission cylinder (33). An interlocking rod (37) is fixedly connected to one end of the screw rod (36) close to the second operating rod (12).

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