A pole-mounted circuit breaker

Abstract

The present application relates to the technical field of circuit breaker, in particular to a pole-mounted circuit breaker, which comprises an isolating switch and a circuit breaker connected in series, a linkage mechanism, the linkage mechanism comprises a radial rod fixedly connected with the isolating switch, a connecting rod rotatably connected with the radial rod, and a second elastic member rotatably connected with the connecting rod, the second elastic member is used for pushing and pulling the radial rod through the connecting rod to realize the opening and closing of the isolating switch. The closing action of the isolating switch is automatically completed in the energy storage process; in the opening process, the opening action of the isolating switch is automatically completed by continuing to pull down the opening handle, which significantly reduces the switching operation steps and improves the work efficiency. When opening, only the circuit breaker is triggered to open and the opening handle is continuously pulled down, the isolating switch can be unlocked by the limiting mechanism and opened, which fundamentally eliminates the vicious misoperation accident of "pulling the isolating switch with load", and does not need to rely on the memory of the operator or external identification.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, specifically to a pole-mounted circuit breaker. Background Technology

[0002] Pole-mounted circuit breakers are widely used protection and control devices in 10kV overhead power distribution lines. They are typically used in conjunction with disconnecting switches to form a visible disconnect point required for safe maintenance. Most existing pole-mounted circuit breakers employ spring-operated mechanisms, and their normal closing operation must follow a strict sequence: First, the operator must pull the energy storage handle or have the energy storage motor drive the cam to rotate, stretching the closing spring to the over-center position and holding it in place by the positioning element. At this point, the circuit breaker is in a ready-to-close state and cannot store energy again. After energy storage is complete, the operator can pull the closing handle, causing the closing half-shaft to roll and unlock. The closing spring releases energy, driving the transmission shaft to close the circuit breaker. During the opening operation, the operator pulls the opening handle, causing the opening half-shaft to roll and unlock. The circuit breaker opens under the action of the opening spring. Based on this, according to the "five-proof" interlocking requirements, a strict switching operation sequence must be followed between the disconnecting switch and the circuit breaker: When de-energizing, the circuit breaker must be disconnected first, then the disconnecting switch opened; when energizing, the disconnecting switch must be closed first, then the circuit breaker closed. The above operating procedures are widely adopted and are the basic norms for ensuring the safe operation of the power system.

[0003] However, the above operating procedures have the following shortcomings in practical applications: First, the operation of the circuit breaker and the disconnector is isolated and completely independent. Operators need to complete multiple steps, including energy storage, closing / opening, and opening / closing the disconnector, separately. The entire switching operation is lengthy and affects work efficiency. Second, the existing operating procedures have extremely high requirements for the operators' standardization. If the operating sequence is incorrect, such as opening or closing the disconnector under load before the circuit breaker is open, it will cause an arcing short circuit accident, resulting in equipment damage or even personal injury.

[0004] Existing technologies include interlocking devices for circuit breakers and disconnectors, such as the "Interlocking Device for Circuit Breaker and Disconnector for Pole-Mounted Circuit Breaker" in Chinese Patent Application No. 2022103208449. This device uses a main shaft crank arm and a shift fork block to achieve interlocking and action time intervals. While it achieves interlocking with the disconnector during closing / opening, the circuit breaker does not store energy during closing and opening, resulting in slow movement of the moving contacts in the arc-extinguishing chamber. This fails to meet the circuit breaker's operational requirements and can easily lead to the risk of contact welding failure or even explosion. Therefore, there is an urgent need for a solution that mechanically integrates the circuit breaker's energy storage, closing / opening operations, and disconnector's operation to reduce operational steps and complexity. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a pole-mounted circuit breaker, comprising: Disconnecting switches and circuit breakers connected in series; The linkage mechanism includes a radial rod fixedly connected to the disconnecting switch, a connecting rod rotatably connected to the radial rod, and a second elastic element rotatably connected to the connecting rod. The second elastic element is used to push and pull the radial rod through the connecting rod to realize the opening and closing of the disconnecting switch. A limiting mechanism includes a rotatable limiting plate and a supporting block that rotates synchronously with the limiting plate. The limiting plate is used to compress a second elastic element when rotating. The limiting mechanism also includes a rotatable supporting rod and a third elastic element that pulls the supporting rod to reset. The supporting rod is used to engage with the supporting block after the limiting plate compresses the second elastic element to limit the second elastic element. The closing mechanism includes a ratchet wrench fixedly connected to the energy storage device in the circuit breaker, a rope reel fixedly sleeved on the output end of the ratchet wrench, and a first pull rope fixedly connected at both ends to the rope reel and the limiting plate respectively. The ratchet wrench is used to pull the limiting plate to compress the second elastic element through the first pull rope during reciprocating motion. The triggering mechanism includes a slidable connecting block located below the trip handle in the circuit breaker, and a second pull rope fixedly connected at both ends to the connecting block and the abutment rod, respectively. The connecting block is used to pull the abutment rod away from the abutment block by the second pull rope when it is pushed by the trip handle.

[0006] As a preferred embodiment of the present invention: the linkage mechanism further includes a stationary baffle fixedly installed on the circuit breaker, a movable baffle located between the connecting rod and the second elastic member, and a telescopic rod whose two ends are fixedly connected to the stationary baffle and the movable baffle respectively. The connecting rod is rotatably connected to the movable baffle. The second elastic member wraps around the telescopic rod and its two ends are fixedly connected to the stationary baffle and the movable baffle respectively. The telescopic rod is used to fix the telescopic direction of the second elastic member.

[0007] As a preferred technical solution of the present invention: the limiting mechanism further includes a rotating column rotatably connected to the circuit breaker, the limiting plate and the abutment block are both fixedly installed on the side wall of the rotating column to achieve synchronous rotation, a columnar protrusion that contacts the moving baffle is fixedly installed on the side of the limiting plate away from the rotating column, and a limiting column for limiting the maximum rotation angle of the limiting plate is fixedly installed on the circuit breaker.

[0008] As a preferred technical solution of the present invention: the limiting mechanism further includes a fixing plate fixedly connected to the circuit breaker, the third elastic element is fixedly installed on the fixing plate, the abutment block is provided with a slot adapted to the abutment rod, and the side of the abutment block near the abutment rod is arc-shaped protrusion.

[0009] As a preferred embodiment of the present invention: the closing mechanism further includes a reversing rod fixedly connected to the ratchet wrench, the reversing rod being used to change the output direction of the ratchet wrench, a support shaft fixedly connected to the circuit breaker, a connecting column rotatably connected to the output end of the ratchet wrench on the support shaft, the connecting column, the ratchet wrench and the energy storage device being coaxial, and the rope reel being sleeved on the connecting column.

[0010] As a preferred embodiment of the present invention, the circumference of the rope wound by the rope coil, the compression length of the second elastic element, and the total angle of rotation required for the energy storage device to store energy are matched.

[0011] As a preferred technical solution of the present invention: the circuit breaker includes a closing switch and a first elastic element. One end of the closing switch is fixedly installed with a closing handle, and the other end is rotatably connected with a closing handle. The two ends of the first elastic element are fixedly connected to the closing switch and the closing handle, respectively. The deformation tension of the first elastic element is greater than the resistance when the closing switch rotates. The connecting block is located below the closing handle.

[0012] As a preferred technical solution of the present invention: the triggering mechanism further includes an arc-shaped plate fixedly installed on the top of the connecting block, the top of the arc-shaped plate is open and adapted to the trip handle, and the distance between the arc-shaped plate and the trip handle is not less than the rotation distance of the trip handle when the circuit breaker is tripped.

[0013] As a preferred embodiment of the present invention, the triggering mechanism further includes a slide rail embedded in the circuit breaker, and the connecting block is fixedly connected to the movable end of the slide rail to achieve a sliding connection of the connecting block.

[0014] As a preferred embodiment of the present invention, it further includes two sets of through-rod rings, both sets of through-rod rings being fixedly installed on the circuit breaker, and the first pull rope and the second pull rope passing through the two sets of through-rod rings respectively to achieve guidance.

[0015] The present invention has the following beneficial effects: Through the coordination of the linkage mechanism, closing mechanism, and limit mechanism, the closing action of the disconnecting switch is automatically completed during the energy storage process; during the opening process, the opening action of the disconnecting switch is automatically completed by continuing to pull down the opening handle. This significantly reduces the number of switching operation steps and improves work efficiency. Because the closing action of the disconnecting switch is mechanically coupled with the energy storage process of the circuit breaker, the disconnecting switch must have already been closed before the circuit breaker closes; during opening, only by first triggering the circuit breaker to open and continuing to pull down the opening handle can the limit mechanism be released from locking the disconnecting switch and the disconnecting switch be opened. This mechanical interlocking fundamentally eliminates the serious misoperation accident of "closing or opening the disconnecting switch under load," without relying on the operator's memory or external markings. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure provided by the present invention.

[0017] Figure 2 This is a schematic diagram of the concealed outer shell provided by the present invention.

[0018] Figure 3 This invention provides Figure 2 Enlarged diagram of point A in the diagram.

[0019] Figure 4 This is a cross-sectional schematic diagram of the telescopic rod provided by the present invention.

[0020] Figure 5 This is a front view of the mounting base provided by the present invention.

[0021] Figure 6 This is a schematic diagram of the ratchet wrench provided by the present invention.

[0022] Figure 7 This is a schematic diagram of the state of the second elastic element after compression provided by the present invention.

[0023] Appendix Figure 1-7 The structures represented by each label are listed below: 1. Disconnecting switch; 11. Mounting beam; 12. Static insulating column; 13. Conductive terminal; 14. Conductive column; 15. Dynamic insulating column; 16. Switch shaft; 17. Base rod; 2. Circuit breaker; 21. Mounting base; 22. Arc-extinguishing chamber; 23. Opening / closing indicator; 24. Energy storage handle; 25. Opening / closing switch; 251. Opening handle; 252. Closing handle; 26. First elastic element; 27. Energy storage indicator; 3. Linkage mechanism; 31. Radial rod; 32. Connecting rod; 33. Moving baffle; 34. Stationary baffle; 35. Second elastic element; 36. Telescopic rod; 361. Inner rod; 362. Outer rod; 4. Limiting mechanism; 41. Rotating column; 42. Limiting plate; 43. Columnar protrusion; 44. Support block; 45. Fixing plate; 46. Support rod; 47. Third elastic element; 48. Limiting column; 5. Closing mechanism; 51. First pull rope; 52. Connecting post; 53. Rope reel; 54. Reversing rod; 55. Support shaft rod; 56. Ratchet wrench; 561. Housing; 562. Gear; 563. Limit ball; 564. Reversing wheel; 565. Rotating shaft; 566. Movable groove; 567. Fourth elastic element; 6. Triggering mechanism; 61. Second pull rope; 62. Slide rail; 63. Connecting block; 64. Curved plate; 7. Rope loop; Detailed Implementation

[0024] The principles and features of the present invention are described below. The embodiments given are only for explaining the present invention and are not intended to limit the scope of the present invention.

[0025] It should be noted that when a part or component is considered to be "connected to," "located on," or "assembled" to another part or component, it can be directly mounted on the other part or component, or it may be located in an intermediate part or component. The terms "left," "right," "upper," "lower," and similar expressions used in this document are for illustrative purposes only.

[0026] Example 1, as Figure 1-7 As shown, a pole-mounted circuit breaker includes: Disconnecting switch 1 and circuit breaker 2 are connected in series electrically.

[0027] The disconnector switch 1 includes three sets of mounting beams 11. Two stationary insulating posts 12 are fixedly mounted on each set of mounting beams 11. A conductive post 14 is rotatably connected to the stationary insulating post 12 closest to the circuit breaker 2. Conductive terminals 13 are fixedly mounted on the top of the stationary insulating post 12 and the end of the conductive post 14. The conductive post 14 is electrically connected to the circuit breaker 2 through the conductive terminals 13. The conductive post 14 can be rotated so that the conductive terminal 13 at its end is electrically connected to the conductive terminal 13 on the stationary insulating post 12 furthest from the circuit breaker 2 to achieve a circuit. The disconnector switch 1 also includes a switch shaft 16 that passes through the three mounting beams 11 and is rotatably connected to them. Three base rods 17 are fixedly connected to the switch shaft 16. Each base rod 17 corresponds to one of the three conductive posts 14. A movable insulating post 15 is rotatably connected to the end of each base rod 17 furthest from the switch shaft 16. The end of the movable insulating post 15 furthest from the base rod 17 is rotatably connected to the conductive post 14. Rotating the switch shaft 16 will drive the three base rods 17 to rotate synchronously. When the three base rods 17 rotate downwards at the same time, the moving insulating column 15 pulls the conductive column 14 downwards to achieve closing. When the three base rods 17 rotate upwards at the same time, the moving insulating column 15 pushes the conductive column 14 upwards to achieve opening.

[0028] The circuit breaker 2 includes a mounting base 21 and three arc-extinguishing chambers 22 fixedly mounted on the mounting base 21. The mounting base 21 also includes an opening / closing indicator 23, an energy storage handle 24, an opening / closing switch 25, an energy storage indicator 27, and an energy accumulator. The opening / closing indicator 23 indicates the opening / closing status of the circuit breaker 2. The energy accumulator is used to store energy by repeatedly rotating at a certain angle. The energy storage indicator 27 indicates whether energy storage is complete. The opening / closing switch 25 controls the opening and closing of the circuit breaker 2. An energy storage handle 24 is fixedly mounted at the end of the energy accumulator for easy operation by a pull rod. The end of the conductive post 14 near the rotating shaft is electrically connected to the terminal of the arc-extinguishing chamber 22.

[0029] The linkage mechanism 3 includes a radial rod 31 fixedly connected to the disconnector switch 1, and a connecting rod 32 rotatably connected to the radial rod 31. Specifically, one end of the radial rod 31 is fixedly connected to the switch shaft 16, and the other end is rotatably connected to the connecting rod 32, so that when the connecting rod 32 is pushed or pulled, it can drive the switch shaft 16 to rotate through the radial rod 31, thereby realizing the opening and closing of the disconnector switch 1. A second elastic element 35 is rotatably connected to the connecting rod 32. The second elastic element 35 is used to push or pull the radial rod 31 through the connecting rod 32 to realize the opening and closing of the disconnector switch 1. The extension and retraction direction of the second elastic element 35 is fixed, and the relative rotation planes of the connecting rod 32 and the second elastic element 35, the relative rotation planes of the connecting rod 32 and the radial rod 31, and the relative rotation planes of the moving insulating column 15 and the bottom rod 17 are parallel to each other.

[0030] The limiting mechanism 4 includes a rotatable limiting plate 42 and a supporting block 44 that rotates synchronously with the limiting plate 42. The limiting plate 42 is used to compress the second elastic element 35 when rotating, that is, the extension and contraction direction of the second elastic element 35 coincides with the rotation plane of the limiting plate 42. It also includes a rotatable supporting rod 46 and a third elastic element 47 that pulls the supporting rod 46 back to its original position. The supporting rod 46 is used to engage with the supporting block 44 after the limiting plate 42 compresses the second elastic element 35 to restrict it. The rotation plane of the supporting rod 46 is parallel to the rotation plane of the limiting plate 42. During the process of the limiting plate 42 rotating to compress the second elastic element 35, the supporting block 44 rotates to contact the supporting rod 46 and drives the supporting rod 46 to rotate. After the second elastic element 35 is compressed, the limiting plate 42 rotates to a vertical position, and the supporting rod 46 engages with the supporting block 44 to fix the limiting plate 42, thereby keeping the second elastic element 35 in a compressed state.

[0031] The closing mechanism 5 includes a ratchet wrench 56 fixedly connected to the energy storage device in the circuit breaker 2, with the rotation axis of the ratchet wrench 56 coinciding with the rotation axis of the energy storage device. A rope reel 53 is fixedly sleeved on the output end of the ratchet wrench 56, and the rope reel 53 is coaxial with the ratchet wrench 56. A first pull rope 51 is fixedly connected at both ends to the rope reel 53 and the limiting plate 42, respectively. The ratchet wrench 56 is used to pull the limiting plate 42 to compress the second elastic element 35 through the first pull rope 51 during reciprocating motion. The rotating end of the ratchet wrench 56 is fixedly connected to the rotating end of the energy storage device, so that when the energy storage device is storing energy, it drives the rotating end of the ratchet wrench 56 to rotate back and forth. This drives the rope winding disc 53 to rotate multiple times in the same direction through the driving end of the ratchet wrench 56, causing the rope winding disc 53 to shrink the exposed length of the first pull rope 51, thereby pulling the limit plate 42 to rotate. This causes the limit plate 42 to compress the second elastic element 35. When the second elastic element 35 is compressed, it pulls the connecting rod 32, causing the connecting rod 32 to drive the switch shaft 16 to rotate through the radial rod 31, causing the bottom rod 17 to rotate downwards to close the isolating switch 1.

[0032] The triggering mechanism 6 includes a slidable connecting block 63 located below the trip handle 251 in the circuit breaker 2, and a second pull rope 61 fixedly connected at both ends to the connecting block 63 and the abutment rod 46, respectively. When the connecting block 63 is pushed by the trip handle 251, the second pull rope 61 pulls the abutment rod 46 away from the abutment block 44. It is worth noting that when the connecting block 63 is pushed by the trip handle 251, i.e., when the connecting block 63 moves, it can pull the second pull rope 61. Specifically, the pulling direction of the second pull rope 61 near the connecting block 63 cannot be opposite to the movement direction of the connecting block 63, to prevent the connecting block 63 from moving closer to the second pull rope 61 and thus making it impossible to pull the second pull rope 61.

[0033] When closing the circuit after maintenance / installation, the ratchet wrench 56 and the rotating end of the energy accumulator are pulled down repeatedly. After each pull, the energy accumulator drives the ratchet wrench 56 to reset until energy storage is complete. During energy storage, the ratchet wrench 56 drives the rope reel 53 to rotate, pulling the first pull rope 51. The first pull rope 51 pulls the limit plate 42, compressing the second elastic element 35, thereby closing the disconnect switch 1. After closing, the abutment block 44 rotates to engage with the abutment rod 46, causing the abutment rod 46 to lock the abutment block 44, preventing the limit plate 42 from rotating. This keeps the second elastic element 35 compressed. Figure 7 As shown.

[0034] That is, when circuit breaker 2 completes energy storage, disconnector 1 simultaneously completes the closing action, so that only circuit breaker 2 needs to be closed subsequently, simplifying the operation steps. In this invention, the operation steps cannot be changed when performing the closing operation. Since circuit breaker 2 must undergo energy storage before closing, otherwise circuit breaker 2 cannot close, and the energy storage simultaneously drives disconnector 1 to close, the closing operation of disconnector 1 always precedes the closing operation of circuit breaker 2, making the operation safer.

[0035] When the circuit breaker needs to be opened for maintenance, the circuit breaker 2 is opened by directly pulling down the trip handle 251, which drives the trip switch 25 to rotate. Then, the trip handle 251 is pulled down further, which pushes the connecting block 63 to move and pulls the second pull rope 61, causing the abutment block 44 to separate from the abutment rod 46. The second elastic element 35 returns to its original deformation and elongates, thereby pushing the disconnecting switch 1 to open.

[0036] Example 2, as Figure 1-7 As shown, this embodiment is a further improvement based on Embodiment 1: The linkage mechanism 3 also includes a stationary baffle 34 fixedly installed on the circuit breaker 2, a movable baffle 33 located between the connecting rod 32 and the second elastic member 35, and a telescopic rod 36 whose two ends are fixedly connected to the stationary baffle 34 and the movable baffle 33 respectively. The connecting rod 32 is rotatably connected to the movable baffle 33, and the second elastic member 35 is fixedly connected to the movable baffle 33 to achieve a rotatable connection with the connecting rod 32. The second elastic member 35 wraps around the telescopic rod 36 and its two ends are fixedly connected to the stationary baffle 34 and the movable baffle 33 respectively. The movable baffle 33 and the stationary baffle 34 are parallel and perpendicular to the extension and retraction direction of the second elastic member 35, so that the second elastic member 35 is subjected to balanced forces during extension and retraction and will not bend. The telescopic rod 36 is used to fix the extension and retraction direction of the second elastic member 35, preventing the second elastic member 35 from bending, and at the same time fixing the extension and retraction angle of the second elastic member 35, preventing the connecting rod 32 from being unable to be pushed / pulled or the push / pull distance from being insufficient.

[0037] The telescopic rod 36 includes an inner rod 361 and an outer rod 362. The inner rod 361 is fixedly connected to the stationary baffle 34, and the outer rod 362 is slidably connected to the inner rod 361 and has one end fixedly connected to the movable baffle 33, so that the movable baffle 33 can only move along the telescopic direction of the telescopic rod 36 and always remains parallel to the stationary baffle 34. Both the inner rod 361 and the outer rod 362 are hollow structures. The first pull rope 51 passes through the stationary baffle 34, the inner rod 361, the outer rod 362 and the movable baffle 33 in sequence and is fixedly connected to the limiting plate 42. That is, the angle between the direction of the force of the first pull rope 51 pulling the limiting plate 42 and the telescopic direction of the second elastic member 35 is less than 90 degrees, so that when the first pull rope 51 pulls the limiting plate 42, the limiting plate 42 can rotate in the direction of compressing the second elastic member 35. It is worth noting that a sliding sleeve is fixedly installed at the connection between the stationary baffle 34 and the first pull rope 51 and at the connection between the moving baffle 33 and the first pull rope 51. The first pull rope 51 passes through the sliding sleeve to reduce the friction between the first pull rope 51 and the stationary baffle 34 and the moving baffle 33, and to prevent damage to the first pull rope 51.

[0038] The limiting mechanism 4 also includes a rotating column 41 rotatably connected to the circuit breaker 2. Limiting plates 42 and abutment blocks 44 are fixedly installed on the side wall of the rotating column 41 to achieve synchronous rotation. There are two limiting plates 42, located on the front and rear sides of the connecting rod 32. That is, during rotation, the movement path of the two limiting plates 42 on the moving baffle 33 is located on both sides of the connecting rod 32, preventing the connecting rod 32 from jamming the limiting plates 42. The two limiting plates 42 ensure that the moving baffle 33 is subjected to balanced forces. The first pull rope 51 is divided into two strands on the side near the limiting plate 42, and the two strands of the first pull rope 51 are fixedly connected to the two limiting plates 42 respectively.

[0039] A columnar protrusion 43, which contacts the moving baffle 33, is fixedly installed on the side of the limiting plate 42 away from the rotating column 41. The columnar protrusion 43 is integrally formed with the limiting plate 42. The first pull rope 51 is fixedly connected to the columnar protrusion 43. The columnar protrusion 43 is located at one corner of the limiting plate 42 and protrudes from both sides of the limiting plate 42. A limiting post 48 is fixedly installed on the circuit breaker 2 to limit the maximum rotation angle of the limiting plate 42. After the limiting plate 42 rotates to contact the limiting post 48, the moving baffle 33 simultaneously contacts both the limiting plate 42 and the columnar protrusion 43. Figure 3 As shown, disconnector 1 has now been tripped.

[0040] The limiting mechanism 4 also includes a fixing plate 45 fixedly connected to the circuit breaker 2. The third elastic element 47 is fixedly installed on the fixing plate 45. The abutment block 44 has a slot adapted to the abutment rod 46. The side of the abutment block 44 near the abutment rod 46 has an arc-shaped protrusion. That is, the lower part of the side of the abutment block 44 away from the rotating column 41 has an arc-shaped protrusion, and the upper part of the side of the abutment block 44 away from the rotating column 41 has a slot. When the first pull rope 51 pulls the columnar protrusion 43 to compress the second elastic element 35, the abutment block 44 rotates until the arc-shaped protrusion contacts the abutment rod 46, causing the abutment rod 46 to rotate and slide along the arc-shaped protrusion of the abutment block 44. After sliding past the arc-shaped protrusion, the third elastic element 47 pulls the abutment rod 46 to rotate and reset, so that the abutment rod 46 is inserted into the abutment block 44, completing the fixation of the second elastic element 35. Figure 7 As shown, at this time, disconnector switch 1 is closed.

[0041] Example 3, as Figure 1-7 As shown, this embodiment is a further improvement based on Embodiment 1 or Embodiment 2: The closing mechanism 5 also includes a reversing rod 54 fixedly connected to the ratchet wrench 56, the reversing rod 54 being used to change the output direction of the ratchet wrench 56, a support shaft 55 fixedly connected to the circuit breaker 2, a connecting post 52 fixedly connected to the output end of the ratchet wrench 56 being rotatably connected to the support shaft 55, the connecting post 52, the ratchet wrench 56 and the energy storage device being coaxial, and a rope reel 53 being sleeved on the connecting post 52.

[0042] The ratchet wrench 56 includes a housing 561 fixedly connected to an energy storage device. A rotating shaft 565 is rotatably connected to the housing 561. A reversing lever 54 is fixedly connected to the rotating shaft 565. A reversing wheel 564 is fixedly sleeved on the rotating shaft 565. A gear 562 is rotatably connected inside the housing 561. The gear 562 meshes with the reversing wheel 564 in one direction. The two ends of the reversing wheel 564 near the gear 562 are respectively fixedly provided with teeth in the opposite direction of meshing with the gear 562. When the reversing lever 54 rotates to drive the reversing wheel 564 to rotate, different teeth can be changed to mesh with the gear 562 to achieve reversing. The ratchet wrench 56 also includes a movable groove 566 fixedly installed inside the housing 561. A limit ball 563 is fixedly installed at the output end of the movable groove 566. The reversing wheel 564 has two ball holes corresponding to the limit ball 563. The limit ball 563 is elastically engaged into different ball holes by the fourth elastic element 567 to fix the reversing wheel 564. When using the reversing lever 54 to change direction, the limiting ball 563 engages with another ball hole.

[0043] The connecting column 52 is fixedly connected to the gear 562, and the rope reel 53 is sleeved on the connecting column 52. The gear 562, the connecting column 52, and the energy storage device are coaxial. The energy storage handle 24 can also be directly fixed to the end of the housing 561, using the housing 561 to replace the rotating end of the energy storage device. When the operator pulls the energy storage handle 24 up and down by pulling the lever, the housing 561 drives the gear 562 to drive the connecting column 52 and the rope reel 53 to rotate in one direction, while the energy storage device completes the energy storage of the internal spring.

[0044] When the energy storage device reciprocates up and down, it causes the outer casing 561 to swing, thereby causing the connecting column 52 to rotate in one direction. This, in turn, causes the rope reel 53 to rotate, controlling the exposed length of the first pull rope 51. After energy storage is completed, i.e., the disconnecting switch 1 is closed, the abutment rod 46 engages with the abutment block 44. Pushing / pulling the reversing lever 54 reverses the ratchet wrench 56, ensuring that when the second elastic element 35 is released, the ratchet wrench 56 will not jam the rope reel 53. This allows the rope reel 53 to rotate, increasing the exposed length of the first pull rope 51, so that the second elastic element 35 can smoothly push the disconnecting switch 1 to open.

[0045] The circumference of the rope winding disc 53, the compression length of the second elastic element 35, and the total angle of rotation required for the energy storage device to store energy are matched. The compression length of the second elastic element 35 refers to the difference between the length of the second elastic element 35 when the limiting plate 42 contacts the limiting post 48 and the length of the second elastic element 35 when the abutting rod 46 is inserted into the abutting block 44, denoted as k. The circumference of the rope winding disc 53 is denoted as c, and the total angle of rotation (one-way) required for the energy storage device is denoted as d, where d is a fixed value. When the limiting plate 42 contacts the limiting post 48, the length of the first pull rope 51 from the end near the limiting plate 42 to the end that contacts the moving baffle 33 is denoted as b. When the second elastic element 35 is compressed, the connection point between the first pull rope 51 and the limiting plate 42 and the connection point between the first pull rope 51 and the moving baffle 33 coincide, that is, when the second elastic element 35 is compressed, the length of the first pull rope 51 on the side of the moving baffle 33 near the connecting rod 32 is zero. It can be concluded that k + b = d / 360 * c. k and b can be determined by measurement. After determination, the size of c can be obtained, thereby calculating the required diameter of the rope winding disc 53.

[0046] Example 4, as Figure 1-7 As shown, this embodiment is a further improvement based on Embodiment 1 or Embodiment 2: The circuit breaker 2 includes a closing switch 25 and a first elastic element 26. A closing handle 252 is fixedly mounted on one end of the closing switch 25, and a closing handle 251 is rotatably connected to the other end. Both ends of the first elastic element 26 are fixedly connected to the closing switch 25 and the closing handle 251, respectively. The deformation tension of the first elastic element 26 is greater than the resistance when the closing switch 25 rotates. The connecting block 63 is located below the closing handle 251. That is, when the closing handle 251 is pulled to open the circuit breaker, the first elastic element 26 restricts the closing handle 251 from rotating independently, causing the closing handle 251 to drive the closing switch 25 to rotate and trigger the circuit breaker 2 to open. After pulling down to the maximum rotation angle of the closing switch 25, the pulling force on the closing handle 251 is increased, causing the closing handle 251 to stretch the first elastic element 26 and rotate, allowing the closing handle 251 to push the connecting block 63.

[0047] The triggering mechanism 6 also includes an arc-shaped plate 64 fixedly installed on the top of the connecting block 63. The top of the arc-shaped plate 64 is open and adapted to the trip handle 251, that is, the diameter of the arc-shaped plate 64 is larger than the diameter of the trip handle 251, and the distance between the arc-shaped plate 64 and the trip handle 251 is not less than the rotation distance of the trip handle 251 when the circuit breaker 2 is tripped. This ensures that the trip handle 251 will not push the connecting block 63 before the circuit breaker 2 is tripped, and that the trip handle 251 rotates into the arc-shaped plate 64 after the circuit breaker 2 is tripped, preventing the trip handle 251 from rotating excessively and disengaging from the connecting block 63.

[0048] The triggering mechanism 6 also includes a slide rail 62 embedded in the circuit breaker 2, and a connecting block 63 is fixedly connected to the movable end of the slide rail 62 to achieve a sliding connection of the connecting block 63. The sliding path of the connecting block 63 partially coincides with the rotation path of the trip handle 251.

[0049] A cover plate is fixedly installed on the front surface of the trip handle 251. The cover plate extends downwards from the trip handle 251 to cover the connecting block 63 and the arc plate 64, preventing operation errors caused by directly pulling the connecting block 63 and the arc plate 64.

[0050] The above-mentioned pole-mounted circuit breakers can be further optimized and / or improved according to actual needs: It also includes two sets of guide loops 7, both of which are fixedly installed on the circuit breaker 2. The first pull rope 51 and the second pull rope 61 pass through the two sets of guide loops 7 respectively to achieve guidance. It is particularly noteworthy that one of the guide loops 7 is located on the side of the connecting block 63. The second pull rope 61 passes through this guide loop 7 and is fixedly connected to the connecting block 63, so that the length direction of the side of the second pull rope 61 closest to the connecting block 63 is nearly perpendicular to the sliding direction of the connecting block 63. Moreover, the guide loop 7 is as close to the connecting block 63 as possible, so that when the connecting block 63 slides, the distance between the guide loop 7 and the connecting block 63 is increased, thereby allowing the second pull rope 61 to smoothly pull the abutment rod 46.

[0051] It also includes a housing cover, which is located on the side of the circuit breaker 2 and encloses the components on the side of the mounting base 21 to prevent components such as the second elastic element 35 from being exposed. Figure 1 As shown.

[0052] In summary: Through the coordination of the linkage mechanism 3, the closing mechanism 5, and the limit mechanism 4, the closing action of the disconnecting switch 1 is automatically completed during the energy storage process; during the opening process, the opening action of the disconnecting switch 1 is automatically completed by continuing to pull down the opening handle 251. This significantly reduces the number of switching operation steps and improves work efficiency. Because the closing action of the disconnecting switch 1 is mechanically coupled with the energy storage process of the circuit breaker 2, the disconnecting switch 1 must have already been closed before the circuit breaker 2 closes; during opening, only by first triggering the circuit breaker 2 to open and continuing to pull down the opening handle can the limit mechanism 4 be released from locking the disconnecting switch 1 and the opening of the disconnecting switch 1 be completed. This mechanical interlocking fundamentally eliminates the serious misoperation accident of "closing or opening the disconnecting switch under load," without relying on the operator's memory or external markings.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the description above. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, using the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A pole-mounted circuit breaker, characterized in that: include: Electrically connected in series: disconnecting switch (1) and circuit breaker (2); The linkage mechanism (3) includes a radial rod (31) fixedly connected to the disconnector switch (1), a connecting rod (32) rotatably connected to the radial rod (31), and a second elastic element (35) rotatably connected to the connecting rod (32). The second elastic element (35) is used to push and pull the radial rod (31) through the connecting rod (32) to realize the opening and closing of the disconnector switch (1). The limiting mechanism (4) includes a rotatable limiting plate (42) and a retaining block (44) that rotates synchronously with the limiting plate (42). The limiting plate (42) is used to compress the second elastic member (35) when rotating. It also includes a rotatable retaining rod (46) and a third elastic member (47) that pulls the retaining rod (46) to reset. The retaining rod (46) is used to lock into the retaining block (44) after the limiting plate (42) compresses the second elastic member (35) to limit the second elastic member (35). The closing mechanism (5) includes a ratchet wrench (56) fixedly connected to the energy storage device in the circuit breaker (2), a rope reel (53) fixedly sleeved on the output end of the ratchet wrench (56), and a first pull rope (51) fixedly connected at both ends to the rope reel (53) and the limiting plate (42) respectively. The ratchet wrench (56) is used to pull the limiting plate (42) to compress the second elastic element (35) through the first pull rope (51) during reciprocating motion. The triggering mechanism (6) includes a slidable connecting block (63) located below the trip handle (251) in the circuit breaker (2), and a second pull rope (61) fixedly connected at both ends to the connecting block (63) and the abutment rod (46) respectively. The connecting block (63) is used to pull the abutment rod (46) away from the abutment block (44) by the second pull rope (61) when it is pushed by the trip handle (251).

2. The pole-mounted circuit breaker according to claim 1, characterized in that: The linkage mechanism (3) further includes a stationary baffle (34) fixedly installed on the circuit breaker (2), a movable baffle (33) located between the connecting rod (32) and the second elastic member (35), and a telescopic rod (36) whose two ends are fixedly connected to the stationary baffle (34) and the movable baffle (33) respectively. The connecting rod (32) is rotatably connected to the movable baffle (33). The second elastic member (35) wraps around the telescopic rod (36) and its two ends are fixedly connected to the stationary baffle (34) and the movable baffle (33) respectively. The telescopic rod (36) is used to fix the telescopic direction of the second elastic member (35).

3. A pole-mounted circuit breaker according to claim 2, characterized in that: The limiting mechanism (4) also includes a rotating column (41) rotatably connected to the circuit breaker (2). The limiting plate (42) and the abutment block (44) are both fixedly installed on the side wall of the rotating column (41) to achieve synchronous rotation. A columnar protrusion (43) that contacts the moving baffle (33) is fixedly installed on the side of the limiting plate (42) away from the rotating column (41). A limiting column (48) for limiting the maximum rotation angle of the limiting plate (42) is fixedly installed on the circuit breaker (2).

4. A pole-mounted circuit breaker according to claim 3, characterized in that: The limiting mechanism (4) also includes a fixing plate (45) fixedly connected to the circuit breaker (2), the third elastic element (47) is fixedly installed on the fixing plate (45), the abutment block (44) is provided with a slot that matches the abutment rod (46), and the abutment block (44) has an arc-shaped protrusion on the side near the abutment rod (46).

5. A pole-mounted circuit breaker according to claim 1, characterized in that: The closing mechanism (5) also includes a reversing rod (54) fixedly connected to the ratchet wrench (56), the reversing rod (54) is used to change the output direction of the ratchet wrench (56), a support shaft rod (55) fixedly connected to the circuit breaker (2), a connecting column (52) fixedly connected to the output end of the ratchet wrench (56) is rotatably connected to the support shaft rod (55), the connecting column (52), the ratchet wrench (56) and the energy storage device are all coaxial, and the rope reel (53) is sleeved on the connecting column (52).

6. A pole-mounted circuit breaker according to claim 5, characterized in that: The circumference of the rope winding disc (53), the compression length of the second elastic element (35), and the total angle of rotation required for the energy storage device to store energy are matched.

7. A pole-mounted circuit breaker according to claim 1, characterized in that: The circuit breaker (2) includes a closing switch (25) and a first elastic element (26). One end of the closing switch (25) is fixedly installed with a closing handle (252), and the other end is rotatably connected with a closing handle (251). The two ends of the first elastic element (26) are fixedly connected to the closing switch (25) and the closing handle (251) respectively. The deformation tension of the first elastic element (26) is greater than the resistance when the closing switch (25) rotates. The connecting block (63) is located below the closing handle (251).

8. A pole-mounted circuit breaker according to claim 7, characterized in that: The triggering mechanism (6) also includes an arc plate (64) fixedly installed on the top of the connecting block (63). The top of the arc plate (64) is open and adapted to the trip handle (251). The distance between the arc plate (64) and the trip handle (251) is not less than the rotation distance of the trip handle (251) when the circuit breaker (2) is tripped.

9. A pole-mounted circuit breaker according to claim 8, characterized in that: The triggering mechanism (6) also includes a slide rail (62) embedded in the circuit breaker (2), and the connecting block (63) is fixedly connected to the movable end of the slide rail (62) to realize the sliding connection of the connecting block (63).

10. A pole-mounted circuit breaker according to claim 1, characterized in that: It also includes two sets of through-rod rings (7), both sets of through-rod rings (7) are fixedly installed on the circuit breaker (2), and the first pull rope (51) and the second pull rope (61) pass through the two sets of through-rod rings (7) respectively to achieve guidance.

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