A convenient maintenance-friendly integrated primary and secondary pole-mounted circuit breaker

Abstract

This invention relates to the field of circuit breaker technology and discloses a primary and secondary integrated pole-mounted circuit breaker that is easy to maintain. The circuit breaker body is mounted on a distribution pole and includes outgoing terminals, isolating blades, incoming terminals, and a mechanism box. It also includes an isolation device, which comprises an isolation cloth, a spiral track, and two adjusting ring seats fixed to the distribution pole. The upper and lower ends of the spiral track are fixed to the adjusting ring seats. The spiral track is spirally wound around the distribution pole and has a sliding groove. The side of the isolation cloth slides within the sliding groove. The isolation cloth is a flexible insulating cloth. A winding device is provided within the adjusting ring seats to control the sliding of the isolation cloth on the sliding groove. When the isolating blade is in a closed or pre-closed state, the isolation cloth is controlled to move below the isolating blade. When the isolating blade is open, the isolation cloth is controlled to rise, passing between the isolating blade and the incoming terminals, and rising to the top of the spiral track to unfold.

Description

Technical Field

[0001] This invention relates to the field of circuit breaker technology, specifically to a primary and secondary integrated pole-mounted circuit breaker that is easy to maintain. Background Technology

[0002] In power systems, integrated primary and secondary pole-mounted circuit breakers are widely used in overhead distribution lines and are key equipment for realizing overhead line distribution automation. Existing integrated primary and secondary pole-mounted circuit breakers typically include a switch body, feeder terminals, power supply voltage transformers, and connecting cables. The switch body is used to close and interrupt load current, overload current, and short-circuit current in the power system. It generally contains isolating switches and incoming terminals to control circuit continuity. The feeder terminals are responsible for collecting data such as three-phase current, line voltages on both sides of the switch, zero-sequence current, and zero-sequence voltage, thereby enabling the calculation and acquisition of active power, reactive power, power factor, frequency, and electrical energy. They also have the function of flexibly configuring operating parameters and control logic according to actual operating conditions, and can handle single-phase grounding and phase-to-phase short-circuit faults, directly tripping to clear the fault. However, existing technologies have the following problems.

[0003] Electromagnetic interference issue: Existing pole-mounted circuit breakers generate electromagnetic pulses when the isolating switch operates during the opening and closing process. Due to the lack of effective isolation measures, these electromagnetic pulses can easily interfere with the circuit breaker's communication equipment. Once the communication equipment is interfered with, it may lead to data transmission errors or interruptions, affecting the accurate detection of line parameters and the timely diagnosis and handling of faults, thereby reducing the reliability and stability of the entire power distribution system.

[0004] Arc extinguishing effectiveness needs improvement: Existing arc extinguishing methods have certain limitations when the isolating switch is opened. For example, some circuit breakers using SF6 arc extinguishing, although SF6 gas has good arc extinguishing performance, will see a significant reduction in arc extinguishing effectiveness if the gas leaks or its purity decreases during actual operation. For circuit breakers using vacuum arc extinguishing, the vacuum level of the vacuum chamber gradually decreases with increasing operating time and number of interruptions, leading to a reduction in breaking capacity and withstand voltage levels, and in severe cases, even causing malfunctions. Furthermore, existing arc extinguishing methods cannot quickly and effectively extinguish the arc at the moment the isolating switch is opened; continued arc burning may damage equipment, affecting its service life and the normal operation of the power system.

[0005] Maintenance inconvenience: When maintaining pole-mounted circuit breakers, the lack of effective shielding and protection from the overhead power grid necessitates the installation of additional protective devices such as safety nets. This not only increases preparation time and workload but also raises maintenance costs. Furthermore, setting up safety nets at heights poses certain safety risks, hindering efficient and safe maintenance work. Summary of the Invention

[0006] (a) Technical problems to be solved

[0007] To address the shortcomings of existing technologies, this invention provides a primary and secondary integrated pole-mounted circuit breaker that is easy to maintain. It features the advantages of isolating electromagnetic pulses with an insulating cloth to avoid interfering with communication equipment, using the insulating cloth to extinguish arcs and improve the arc extinguishing effect, and covering the power grid with an umbrella-shaped insulating cloth to eliminate the need for a separate insulating net, thus facilitating maintenance. This invention solves the problems of electromagnetic pulse interference affecting communication equipment detection, poor arc extinguishing effect, and the inconvenience caused by the need for a separate insulating net during maintenance in existing technologies.

[0008] (II) Technical Solution

[0009] To achieve the above objectives, the present invention provides the following technical solution:

[0010] A primary and secondary integrated pole-mounted circuit breaker that is easy to maintain includes a circuit breaker body mounted on a distribution pole. The circuit breaker body includes outgoing terminals, isolating blades, incoming terminals, and a mechanism box. It also includes an isolation device, which includes an isolation cloth, a spiral track, and two adjusting ring seats fixed on the distribution pole. The upper and lower ends of the spiral track are fixed on the adjusting ring seats. The spiral track is spirally wound on the distribution pole. The spiral track is provided with a sliding groove. The side of the isolation cloth slides within the sliding groove. The isolation cloth is a flexible insulating cloth. The adjusting ring seats are provided with a winding device for controlling the sliding of the isolation cloth on the sliding groove.

[0011] When the isolating switch is in the closed or pre-closed state, the control isolating cloth moves to below the isolating switch. When the isolating switch is open, the control isolating cloth rises, passes between the isolating switch and the incoming terminal, and rises to the top of the spiral track to unfold.

[0012] Preferably, the spiral track is a multi-pitch spiral coil, and the pitch of the spiral track gradually decreases from bottom to top.

[0013] Preferably, the winding device in the adjusting ring seat includes a pull rope, the two ends of which are fixed in the upper and lower adjusting ring seats, and the middle part is set in the slide groove for sliding. The isolation cloth is provided with multiple support ribs, and the ends of the support ribs are provided with pull rings. The pull rings slide in the slide groove, and the pull rope passes through each pull ring. The top side of the isolation cloth is called the top edge, and the pull ring at the end of the support rib of the top edge of the isolation cloth is the top edge pull ring. The pull rope is provided with limit rings at the front and rear positions of the pull ring at the top edge.

[0014] The adjusting ring seat includes a pull wire seat, which has a pull wire groove for coiling the pull rope. A pull wire driven ring is provided in the pull wire groove, and the pull wire driven ring fixes the end of the pull rope. A pull wire motor is fixed on the pull wire seat, and a pull wire driving wheel is provided on the output shaft of the pull wire motor. The pull wire driving wheel drives the pull wire driven ring to rotate.

[0015] Preferably, the adjusting ring seat is further provided with a support seat, the support seat is fixed on the power distribution pole, the pull wire seat is rotatably connected to the support seat, the pull wire seat has a built-in rotating driven wheel below it, the support seat is fixed with a rotating motor, the output shaft of the rotating motor is provided with a rotating driving wheel, and the rotating driving wheel is connected to the rotating driven wheel in a transmission manner.

[0016] By rotating the pull wire seat, the spiral track is driven to rotate on the power distribution pole, and the rotation of the spiral track causes the isolation cloth to rotate horizontally along the power distribution pole.

[0017] Preferably, the socket on the isolating knife for closing with the incoming terminal is a slot, and there are slidingly connected pressure blocks on both sides of the slot. The inner side of the pressure block rests against the slot, and the outer side of the pressure block protrudes from the side of the isolating knife. A return spring is provided between the pressure block and the isolating knife, and the return spring provides elastic force for the pressure block to slide into the slot.

[0018] The top edge of the isolation cloth is also provided with multiple lengthening stiffeners, and there are gaps between each lengthening stiffener. When the isolation knife is closed or pre-closed, each isolation knife is located in the gap of the lengthening stiffener.

[0019] Preferably, the circuit breaker body includes three sets of outgoing terminals, vacuum bulbs, current transformers, isolating blades, and incoming terminals. The outgoing terminals are connected to the current transformers via vacuum bulbs. The current transformers are rotatably connected to the isolating blades. The isolating blades are closed with the incoming terminals. The three vacuum bulbs are mounted on the mechanism box. An mounting plate is also fixed to the outside of the mechanism box. The bottom of each incoming terminal is fixed to multiple incoming insulators. Each incoming insulator is fixed to the mounting plate. A crank is rotatably mounted on the mounting plate. A protrusion on the crank is rotatably connected to one end of multiple levers. The other end of each lever is rotatably connected to the middle position of the corresponding isolating blade. A rotating pull rod is provided at the end of the crank. Pull rings are provided at both ends of the rotating pull rod. By pulling the rotating pull rod, the crank is rotated, thereby controlling the isolating blade to close or open.

[0020] Preferably, an upper clamp and a lower clamp are fixed on the distribution pole, an upper support plate is fixed to the side of the lower clamp, the mechanism box is supported and fixed above the upper support plate, the lower clamp is lower in height than the upper clamp, a lower support plate is fixed on the lower clamp, and the other end of the lower support plate is fixed to the bottom of the upper support plate away from the distribution pole. The upper support plate, the lower support plate and the distribution pole form a triangular support structure.

[0021] Preferably, the upper and lower adjusting ring seats are also provided with waterproof covers. The waterproof cover on the lower adjusting ring seat is fixed to the pull wire seat, and the waterproof cover on the upper adjusting ring seat is fixed to the support seat.

[0022] Furthermore, the waterproof cover is connected to the pull wire seat or support seat by bolt fixing or snap-fit ​​fixing.

[0023] Preferably, the spiral track has a multi-segment structure, and the segments of the spiral track are fixed together by bolts.

[0024] Preferably, each pull wire holder, pull wire driven ring, support base, and waterproof cover is a ring structure formed by assembling two symmetrical half-rings. The two half-rings are fixed together by bolts or clips, which facilitates the installation of the pull wire holder, pull wire driven ring, support base, and waterproof cover on the distribution pole.

[0025] (III) Beneficial Effects

[0026] Compared with the prior art, the present invention provides a primary and secondary integrated pole-mounted circuit breaker that is easy to maintain, and has the following beneficial effects:

[0027] 1. This easy-to-maintain integrated primary and secondary pole-mounted circuit breaker, by installing an isolation cloth on the circuit breaker body, when the isolating switch is closed or pre-closed, the isolation cloth is located below the isolating switch. At this time, the isolation cloth is used to block the electromagnetic pulse generated when the isolating switch and the incoming terminal are connected. After the isolating switch is opened, the isolation cloth passes between the isolating switch and the incoming terminal. At this time, the isolation cloth is used to extinguish the electric arc between the isolating switch and the incoming terminal. When the isolation cloth rises to the top of the spiral track, the isolation cloth unfolds to form an isolation net. At this time, the isolation cloth is used to isolate the power grid above, which facilitates the maintenance of the circuit breaker body by the staff.

[0028] 2. This easy-to-maintain integrated primary and secondary pole-mounted circuit breaker, by setting the pitch of the spiral track to gradually decrease from bottom to top, allows the isolation cloth to be nearly vertical when it is at the bottom of the spiral track, thus improving the isolation effect on the closing point of the isolating switch. When the isolation cloth is at the top of the spiral track, it can be horizontally deployed to improve the isolation effect on the power grid above.

[0029] 3. This easy-to-maintain integrated primary and secondary pole-mounted circuit breaker uses a support base to drive the pull wire base and spiral track to rotate, causing the isolation cloth to rotate horizontally along the distribution pole. When the isolating knife is pre-closed, the rotation of the isolation cloth ensures that the top of the isolation cloth is attached to the underside of the raised isolating knife. When the isolation cloth encounters a cable obstruction while rising along the spiral track, it can be rotated to bypass the cable. For example, when a cable obstructs the front of the distribution pole, the support base is controlled to rotate the isolation cloth to the rear, and then the isolation cloth is controlled to rise along the spiral track. At this point, when the isolation cloth spirally slides to the front of the distribution pole, its height is already higher than the previously obstructed cable, thus achieving the purpose of bypassing the cable.

[0030] 4. This easy-to-maintain integrated primary and secondary pole-mounted circuit breaker features a pressure block inside the isolating switch and an extension rib on the isolating cloth. The extension rib strengthens the isolating effect of the cloth. When the isolating switch is closed, the pressure block reinforces the clamping effect on the incoming terminal and is pushed outward. The pressure block limits and supports the extension rib. Since the height of the incoming terminal is generally lower than the rotation axis of the isolating switch, when the isolating cloth is perpendicular to the isolating switch, it is tilted towards the incoming terminal. At this time, the outward protrusion of the pressure block supports the extension rib and prevents the isolating cloth from directly contacting the incoming terminal. When the isolating switch is open, the pressure block retracts into the slot. At this time, the extension rib is not obstructed by the pressure block and can rise smoothly along the spiral track. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of the circuit breaker body 1 according to Embodiment 1 of the present invention.

[0032] Figure 2This is a schematic diagram of the circuit breaker body 1 installed on the distribution pole 4 according to Embodiment 1 of the present invention. At this time, the isolating switch 14 is in the closed state.

[0033] Figure 3 This is a side view of the circuit breaker body 1 and the isolation cloth 21 in embodiment 1 of the present invention, at which time the isolation knife 14 is in the closed state.

[0034] Figure 4 This is a schematic diagram of the circuit breaker body 1 installed on the distribution pole 4 according to an embodiment of the present invention. At this time, the isolating knife 14 is in the open state, and the isolating cloth 21 is folded inside the circuit breaker body 1.

[0035] Figure 5 This is a side view of the circuit breaker body 1 and the isolation cloth 21 in accordance with Embodiment 1 of the present invention. At this time, the isolation knife 14 is in the open state, and the isolation cloth 21 is folded inside the circuit breaker body 1.

[0036] Figure 6 This is a schematic diagram of the circuit breaker body 1 installed on the distribution pole 4 according to an embodiment of the present invention. At this time, the isolating switch 14 is in the open state, and the isolating cloth 21 is unfolded on the distribution pole 4.

[0037] Figure 7 This is a schematic diagram of the structure of the isolation cloth 21 and the pull rope 24 in Embodiment 1 of the present invention.

[0038] Figure 8 This is Embodiment 1 of the present invention. Figure 7 A magnified view of a portion of region A in the middle.

[0039] Figure 9 This is a schematic diagram of the structure of the isolation device 2 installed on the power distribution pole 4 according to Embodiment 1 of the present invention.

[0040] Figure 10 This is a schematic diagram of the isolation device 2 in Embodiment 1 of the present invention.

[0041] Figure 11 This is a cross-sectional perspective view of the adjusting ring seat 23 according to Embodiment 1 of the present invention.

[0042] Figure 12 This is an exploded view of the adjusting ring seat 23 in Embodiment 1 of the present invention.

[0043] Figure 13 This is a schematic diagram of the structure of the adjusting ring seat 23 after the waterproof cover 233 is removed in Embodiment 1 of the present invention.

[0044] Figure 14 This is a schematic diagram of the structure of the pull wire holder 231 in Embodiment 1 of the present invention.

[0045] Figure 15 This is a schematic diagram of the structure of the pull rope 24 and the pull wire driven ring 234 in embodiment one of the present invention.

[0046] Figure 16 This is a schematic diagram of the structure of the isolation knife 14, the isolation cloth 21 and the incoming terminal 15 in Embodiment 2 of the present invention. At this time, the isolation knife 14 is in the open state.

[0047] Figure 17 This is a schematic diagram of the structure of the isolation knife 14, the isolation cloth 21 and the incoming terminal 15 in embodiment 2 of the present invention. At this time, the isolation knife 14 is in the closed state.

[0048] Figure 18 This is a schematic diagram of the structure of the isolation knife 14 in Embodiment 2 of the present invention.

[0049] Figure 19 This is a cross-sectional perspective view of the slot 142 of the isolation knife 14 in Embodiment 2 of the present invention.

[0050] In the diagram: 1. Circuit breaker body; 11. Outgoing terminal; 12. Vacuum bulb; 13. Current transformer; 14. Isolating blade; 15. Incoming terminal; 16. Mechanism box; 17. Incoming insulator; 141. Pressure block; 142. Slot; 18. Crank rod; 19. Lever;

[0051] 2. Isolation device; 21. Isolation cloth; 211. Supporting stiffener; 212. Pull ring; 213. Extended stiffener; 22. Spiral track; 221. Slide groove; 23. Adjusting ring seat; 231. Pull wire seat; 2311. Pull wire groove; 2312. Pull wire motor; 2313. Pull wire drive wheel; 2314. Rotary driven wheel; 232. Support seat; 2321. Rotary motor; 2322. Rotary drive wheel; 2323. Rotating block; 233. Waterproof cover; 234. Pull wire driven ring; 24. Pull rope; 241. Limiting ring;

[0052] 31. Upper clamp; 32. Upper support plate; 33. Lower clamp; 34. Lower support plate;

[0053] 4. Power distribution poles. Detailed Implementation

[0054] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0055] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention 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 invention.

[0056] In addition, a fixed connection refers to a connection in which parts or components are fixed and there is no relative movement; a transmission connection refers to a connection in which mechanical motion or torque is transmitted to other working parts through a transmission component; a sliding connection refers to a connection in which two objects are in contact but not fixed and can slide relative to each other; and a rotational connection refers to a connection in which two objects are in contact but not fixed and can rotate relative to each other.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0058] Example 1:

[0059] This embodiment provides a primary and secondary integrated pole-mounted circuit breaker that is easy to maintain and has the following technical features.

[0060] Please see Figure 1-15 A primary and secondary integrated pole-mounted circuit breaker that is easy to maintain includes a circuit breaker body 1, which is mounted on a distribution pole 4. The circuit breaker body 1 includes an outgoing terminal 11, an isolating blade 14, an incoming terminal 15, and a mechanism box 16. It also includes an isolation device 2, which includes an isolation cloth 21, a spiral track 22, and two adjusting ring seats 23 fixed on the distribution pole 4. The upper and lower ends of the spiral track 22 are fixed on the adjusting ring seats 23. The spiral track 22 is spirally wound on the distribution pole 4. A sliding groove 221 is provided on the spiral track 22. The side of the isolation cloth 21 slides in the sliding groove 221. The isolation cloth 21 is a flexible insulating cloth. A winding device for controlling the sliding of the isolation cloth 21 on the sliding groove 221 is provided in the adjusting ring seats 23.

[0061] When the isolating switch 14 is in the closed or pre-closed state, the control isolating cloth 21 moves to below the isolating switch 14. When the isolating switch 14 is open, the control isolating cloth 21 rises, passes between the isolating switch 14 and the incoming terminal 15, and rises to the top of the spiral track 22 to unfold.

[0062] Through the above improvements, by installing an isolation cloth 21 on the circuit breaker body 1, when the isolating switch 14 is closed or pre-closed, the isolation cloth 21 is located below the isolating switch 14. At this time, the isolation cloth 21 is used to block the electromagnetic pulse generated when the connection between the isolating switch 14 and the incoming terminal 15 is closed or opened. After the isolating switch 14 is opened, the isolation cloth 21 passes between the isolating switch 14 and the incoming terminal 15. At this time, the isolation cloth 21 is used to extinguish the electric arc between the isolating switch 14 and the incoming terminal 15. When the isolation cloth 21 rises to the top of the spiral track 22, the isolation cloth 21 unfolds to form an isolation net. At this time, the isolation cloth 21 is used to isolate the power grid above, making it easier for staff to maintain the circuit breaker body 1.

[0063] Furthermore, the spiral track 22 is designed to be a multi-pitch spiral coiled, with the pitch of the spiral track 22 gradually decreasing from bottom to top.

[0064] Through the above improvements, by setting the pitch of the spiral track 22 to gradually decrease from bottom to top, when the isolation cloth 21 is located at the bottom of the spiral track 22, the isolation cloth 21 can be nearly vertical to improve the isolation effect on the closing point of the isolation knife 14. When the isolation cloth 21 is located at the top of the spiral track 22, the isolation cloth 21 can be horizontally unfolded to improve the isolation effect on the power grid above.

[0065] Furthermore, the winding device inside the adjusting ring seat 23 includes a pull rope 24. The two ends of the pull rope 24 are fixed inside the upper and lower adjusting ring seats 23, and the middle part is set in the slide groove 221 for sliding. Multiple support ribs 211 are provided on the isolation cloth 21. Pull rings 212 are provided at the ends of the support ribs 211. The pull rings 212 slide in the slide groove 221. The pull rope 24 passes through each pull ring 212. The top side of the isolation cloth 21 is called the top edge. The pull rings 212 at the ends of the support ribs 211 on the top edge of the isolation cloth 21 are called the top edge pull rings 212. Limiting rings 241 are provided in front of and behind the pull rings 212 on the top edge of the pull rope 24.

[0066] The adjusting ring seat 23 includes a pull wire seat 231, a pull wire groove 2311 for coiling the pull rope 24 is provided in the pull wire seat 2311, a pull wire driven ring 234 is provided in the pull wire groove 2311, the pull wire driven ring 234 fixes the end of the pull rope 24, a pull wire motor 2312 is fixed on the pull wire seat 231, a pull wire driving wheel 2313 is provided on the output shaft of the pull wire motor 2312, and the pull wire driving wheel 2313 drives the pull wire driven ring 234 to rotate.

[0067] In a further configuration, the pull wire drive wheel 2313 is a gear, and the outer side of the pull wire driven ring 234, which contacts the pull wire drive wheel 2313, has external teeth that mesh with the pull wire drive wheel 2313. The pull wire drive wheel 2313 drives the pull wire driven ring 234 to rotate through gear transmission. Alternatively, the pull wire drive wheel 2313 is a rubber wheel, and the outer side of the pull wire driven ring 234, which contacts the pull wire drive wheel 2313, has a rubber pad that fits against the pull wire drive wheel 2313. The pull wire drive wheel 2313 drives the pull wire driven ring 234 to rotate through friction.

[0068] With the above improvements, when the isolation cloth 21 needs to be lowered, the controller starts the pull wire motor 2312 in the lower adjusting ring seat 23, driving the pull wire drive wheel 2313 to rotate. The pull wire drive wheel 2313 meshes with the pull wire driven ring 234, thereby driving the pull wire driven ring 234 to rotate. The lower end of the pull rope 24 is fixed to the pull wire driven ring 234. The rotation of the pull wire driven ring 234 drives the pull rope 24 to be wound into the pull wire groove 2311, and controls the pull rope 24 in the upper adjusting ring seat 23 to be released, so that the pull rope 24 drives the isolation cloth 21 to descend. When the isolation cloth 21 needs to be raised, the controller controls the pull wire motor 2312 in the adjusting ring seat 23 above the power distribution pole 4 to drive the pull wire drive wheel 2313 to rotate. The pull wire drive wheel 2313 meshes with the pull wire driven ring 234, thereby driving the pull wire driven ring 234 to rotate. The pull wire driven ring 234 is fixed to the upper end of the pull rope 24. The rotation of the pull wire driven ring 234 drives the pull rope 24 to be wound into the pull wire groove 2311, and controls the pull rope 24 in the adjusting ring seat 23 below to release the pull rope 24, so that the pull rope 24 drives the isolation cloth 21 to rise.

[0069] Furthermore, the adjusting ring seat 23 is also provided with a support seat 232, which is fixed on the power distribution pole 4. The pull wire seat 231 is rotatably connected to the support seat 232. The pull wire seat 231 has a built-in rotating driven wheel 2314 below it. The support seat 232 is fixed with a rotating motor 2321. The output shaft of the rotating motor 2321 is provided with a rotating driving wheel 2322, which is connected to the rotating driven wheel 2314 in a transmission connection.

[0070] By rotating the pull wire seat 231, the spiral track 22 is driven to rotate on the power distribution pole 4. The rotation of the spiral track 22 causes the isolation cloth 21 to rotate horizontally along the power distribution pole 4.

[0071] In a further configuration, the rotating ring drive wheel 2322 is a gear, and the outer side of the rotating ring driven wheel 2314, which contacts the rotating ring drive wheel 2322, has external teeth that mesh with the rotating ring drive wheel 2322. The rotating ring drive wheel 2322 drives the rotating ring driven wheel 2314 to rotate through gear transmission. Alternatively, the rotating ring drive wheel 2322 is a rubber wheel, and the outer side of the rotating ring driven wheel 2314, which contacts the rotating ring drive wheel 2322, has a rubber pad that fits against the rotating ring drive wheel 2322. The rotating ring drive wheel 2322 drives the rotating ring driven wheel 2314 to rotate through friction.

[0072] Furthermore, the support base 232 is provided with a rotating locking block 2323, which slides within the pull wire base 231.

[0073] Through the above improvements, by setting the support base 232 to drive the pull wire base 231 and the spiral track 22 to rotate, the isolation cloth 21 rotates horizontally along the distribution pole 4. When the isolation knife 14 is pre-closed, the rotation of the isolation cloth 21 makes the top of the isolation cloth 21 fit against the bottom of the isolation knife 14 when it is raised. When the isolation cloth 21 rises along the spiral track 22 and encounters a cable obstruction, the isolation cloth 21 can be rotated to bypass the wire. For example, when the cable obstruction is encountered at the front of the distribution pole 4, the support base 232 is controlled to rotate the isolation cloth 21 to the rear side, and then the isolation cloth 21 is controlled to rise along the spiral track 22. At this time, when the isolation cloth 21 slides spirally along the spiral track 22 to the front of the distribution pole 4, the height of the isolation cloth 21 is higher than the previously obstructed cable, thus achieving the purpose of bypassing the cable.

[0074] Further configured, the circuit breaker body 1 includes three sets of outgoing terminals 11, vacuum bulbs 12, current transformers 13, isolating blades 14, and incoming terminals 15. The outgoing terminals 11 are connected to the current transformers 13 through the vacuum bulbs 12. The current transformers 13 are rotatably connected to the isolating blades 14. The isolating blades 14 are closed with the incoming terminals 15. The three vacuum bulbs 12 are mounted on the mechanism box 16. A mounting plate is also fixed on the outside of the mechanism box 16. The bottom of each incoming terminal 15 is fixed to multiple incoming insulators 17. Each incoming insulator 17 is fixed to the mounting plate. A crank rod 18 is rotatably mounted on the mounting plate. A protrusion on the crank rod 18 is rotatably connected to one end of multiple levers 19. The other end of each lever 19 is rotatably connected to the middle position of the corresponding isolating blade 14. A rotating pull rod is provided at the end of the crank rod 18. Pull rings are provided at both ends of the rotating pull rod. By pulling the rotating pull rod, the crank rod 18 is rotated, thereby controlling the isolating blades 14 to close or open.

[0075] Furthermore, an upper clamp 31 and a lower clamp 33 are fixed on the distribution pole 4. An upper support plate 32 is fixed to the side of the lower clamp 33. The mechanism box 16 is supported and fixed above the upper support plate 32. The lower clamp 33 is lower than the upper clamp 31. A lower support plate 34 is fixed on the lower clamp 33. The other end of the lower support plate 34 is fixed to the bottom of the upper support plate 32 away from the distribution pole 4. The upper support plate 32, the lower support plate 34 and the distribution pole 4 form a triangular support structure.

[0076] Furthermore, waterproof covers 233 are provided on the upper and lower adjustment ring seats 23. The waterproof cover 233 on the lower adjustment ring seat 23 is fixed on the pull wire seat 231, and the waterproof cover 233 on the upper adjustment ring seat 23 is fixed on the support seat 232.

[0077] Furthermore, the waterproof cover 233 is connected to the cable holder 231 or the support seat 232 by bolt fixing or snap-fit ​​fixing.

[0078] Furthermore, the spiral track 22 is a multi-segment structure, and the segments of the spiral track 22 are fixed together by bolts.

[0079] Furthermore, each of the pull wire holders 231, pull wire driven rings 234, support seats 232, and waterproof covers 233 is a ring structure formed by assembling two symmetrical half-rings. The two half-rings are fixed together by bolts or clips, which facilitates the installation of pull wire holders 231, pull wire driven rings 234, support seats 232, and waterproof covers 233 on the distribution pole 4.

[0080] Furthermore, a control box is installed on the power distribution pole 4, and a controller is installed inside the control box. The controller controls the rotation of the pull-wire motor 2312 and the ring motor 2321 through a wireless transmission module.

[0081] It should be noted that the wireless transmission module is either Bluetooth or Wi-Fi.

[0082] Furthermore, the surface of the isolation cloth 21 is coated with a high-temperature resistant coating, which is a ceramic coating or an organosilicon high-temperature resistant coating, with a coating thickness of 0.1 to 0.3 mm.

[0083] Furthermore, the isolation cloth 21 has a three-layer sandwich structure, with a conductive fiber layer in the middle and a coated fabric layer on the outer layer. The base fabric of the coated fabric layer is nylon or polyester, and the surface is coated with polytetrafluoroethylene, which gives it flexibility, electromagnetic shielding and insulation properties.

[0084] Furthermore, the supporting stiffener 211 and the extended stiffener 213 are configured as a three-layer sandwich structure, with a conductive alloy layer in the middle and an insulating rubber layer on the outer layer, giving them rigidity, electromagnetic shielding, and insulation properties.

[0085] Furthermore, wear-resistant strips are provided inside the groove 221 of the spiral track 22. The wear-resistant strips are made of polytetrafluoroethylene and are fixed to the inner wall of the groove 221 by bolts.

[0086] Furthermore, the control box is equipped with a position sensor, which is used to detect the real-time position of the isolation cloth 21 and transmit the signal to the controller. The controller adjusts the operating status of the pull wire motor 2312 and the rotating ring motor 2321 according to the position signal.

[0087] Working principle: The circuit breaker body 1 is fixed by the triangular support structure formed by the upper clamp 31, lower clamp 33, upper support plate 32, and lower support plate 34 on the distribution pole 4. The closing and opening of its isolating switch 14 is controlled by mechanical structures such as the crank 18 and lever 19 on the outside of the mechanism box 16. The isolation cloth 21 in the isolation device 2 is raised and lowered through the spiral track 22 and the winding device in the adjusting ring seat 23: When the isolation knife 14 is closed or pre-closed, the pull rope 24 in the adjusting ring seat 23 is driven by the winding device such as the pull wire motor 2312, the pull wire drive wheel 2313, and the pull wire driven ring 234, which controls the isolation cloth 21 to slide along the slide groove 221 of the spiral track 22 to below the isolation knife 14. At this time, the isolation cloth 21 blocks the electromagnetic pulse generated at the connection between the isolation knife 14 and the incoming terminal 15. When the isolation knife 14 is open, the winding device drives the isolation cloth 21 to rise, so that it passes between the isolation knife 14 and the incoming terminal 15, and uses the insulation properties to extinguish the arc between the two. When the isolation cloth 21 continues to rise to the top of the spiral track 22, because the pitch of the spiral track 22 gradually decreases from bottom to top, the isolation cloth 21 unfolds to form an isolation net, isolating the power grid above for maintenance by personnel. Meanwhile, the rotating ring motor 2321, rotating ring drive wheel 2322, and rotating ring driven wheel 2314 on the support seat 232 of the adjusting ring seat 23 can drive the pull wire seat 231 and the spiral track 22 to rotate, so that the isolation cloth 21 can bypass the cable obstruction and ensure smooth lifting.

[0088] Example 2:

[0089] This embodiment provides a primary and secondary integrated pole-mounted circuit breaker that is easy to maintain. In addition to the technical solutions of the above embodiments, it also has the following technical features.

[0090] Please see Figure 16-19 The socket on the isolating knife 14 for closing with the incoming terminal 15 is a slot 142. Sliding pressure blocks 141 are provided on both sides of the slot 142. The inner side of the pressure block 141 presses against the slot 142, and the outer side of the pressure block 141 protrudes from the side of the isolating knife 14. A return spring is provided between the pressure block 141 and the isolating knife 14. The return spring provides elastic force for the pressure block 141 to slide into the slot 142.

[0091] The top edge of the isolation cloth 21 is also provided with multiple lengthening stiffeners 213, and there are gaps between each lengthening stiffener 213. When the isolation blade 14 is closed or pre-closed, each isolation blade 14 is located in the gap of the lengthening stiffener 213.

[0092] Furthermore, the inner side of the pressure block 141 that contacts the inlet terminal 15 is provided with an inclined chamfer, which facilitates the insertion of the inlet terminal 15 between the two pressure blocks 141 and pushes the pressure blocks 141 outward.

[0093] Furthermore, the outer part of the pressure block 141 used to support the pressure block 141 is provided with insulating material, and the inner part of the pressure block 141 used to connect the incoming terminal 15 and the isolation knife 14 is provided with conductive material.

[0094] Furthermore, the insulating material is epoxy resin, polytetrafluoroethylene, ceramic or glass fiber reinforced plastic, and the conductive material is copper, aluminum, copper alloy or aluminum alloy.

[0095] Through the above improvements, a pressure block 141 is provided inside the isolating knife 14, and an extended stiffener 213 is provided on the isolating cloth 21. The extended stiffener 213 strengthens the isolation effect of the isolating cloth 21. When the isolating knife 14 is closed, the pressure block 141 strengthens the clamping effect on the incoming terminal 15, and the pressure block 141 is pushed outward. The pressure block 141 limits and supports the extended stiffener 213. Since the height of the incoming terminal 15 is generally lower than the rotation axis of the isolating knife 14, when the isolating cloth 21 is perpendicular to the isolating knife 14, the isolating cloth 21 is inclined towards the incoming terminal 15. At this time, the outward protrusion of the pressure block 141 can support the extended stiffener 213 and prevent the isolating cloth 21 from directly contacting the incoming terminal 15. When the isolating knife 14 is open, the pressure block 141 retracts into the slot 142. At this time, the extended stiffener 213 is not blocked by the pressure block 141 and can rise smoothly along the spiral track 22.

[0096] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0097] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A primary and secondary integrated pole-mounted circuit breaker that is easy to maintain, comprising a circuit breaker body (1), the circuit breaker body (1) being mounted on a distribution pole (4), the circuit breaker body (1) comprising an outgoing terminal (11), an isolating blade (14), an incoming terminal (15), and a mechanism box (16), characterized in that: It also includes an isolation device (2), which includes an isolation cloth (21), a spiral track (22) and two adjusting ring seats (23) fixed on the power distribution pole (4). The upper and lower ends of the spiral track (22) are fixed on the adjusting ring seats (23). The spiral track (22) is spirally wound on the power distribution pole (4). A sliding groove (221) is provided on the spiral track (22). The side of the isolation cloth (21) slides in the sliding groove (221). The isolation cloth (21) is a flexible insulating cloth. A winding device for controlling the sliding of the isolation cloth (21) on the sliding groove (221) is provided in the adjusting ring seat (23). When the isolating knife (14) is in the closed or pre-closed state, the control isolating cloth (21) moves to below the isolating knife (14). When the isolating knife (14) is open, the control isolating cloth (21) rises. The isolation cloth (21) passes between the isolating knife (14) and the incoming terminal (15) and rises to the top of the spiral track (22) to unfold. The spiral track (22) is a multi-pitch spiral coiled, and the pitch of the spiral track (22) gradually decreases from bottom to top; The winding device inside the adjusting ring seat (23) includes a pull rope (24). The two ends of the pull rope (24) are fixed inside the upper and lower adjusting ring seats (23), and the middle part is set in the slide groove (221) for sliding. The isolation cloth (21) is provided with multiple support ribs (211). The end of the support ribs (211) is provided with a pull ring (212). The pull ring (212) slides in the slide groove (221). The pull rope (24) passes through each pull ring (212). The top side of the isolation cloth (21) is called the top edge. The pull ring (212) at the end of the support rib (211) on the top edge of the isolation cloth (21) is called the top edge pull ring (212). The pull rope (24) is provided with limit rings (241) at the front and rear positions of the top edge pull ring (212). The adjusting ring seat (23) includes a pull wire seat (231), which has a pull wire groove (2311) for coiling the pull rope (24) inside. The pull wire groove (2311) has a pull wire driven ring (234) inside. The pull wire driven ring (234) fixes the end of the pull rope (24). The pull wire seat (231) is fixed with a pull wire motor (2312). The pull wire driven wheel (2313) is provided on the output shaft of the pull wire motor (2312). The pull wire driven wheel (2313) drives the pull wire driven ring (234) to rotate.

2. The easy-to-maintain integrated primary and secondary pole-mounted circuit breaker according to claim 1, characterized in that, The adjusting ring seat (23) is also provided with a support seat (232), the support seat (232) is fixed on the power distribution pole (4), the pull wire seat (231) is rotatably connected to the support seat (232), the pull wire seat (231) has a built-in rotating driven wheel (2314) below it, the support seat (232) is fixed with a rotating motor (2321), the output shaft of the rotating motor (2321) is provided with a rotating driving wheel (2322), and the rotating driving wheel (2322) is connected to the rotating driven wheel (2314) in a transmission. By rotating the pull wire seat (231), the spiral track (22) is driven to rotate on the power distribution pole (4). The rotation of the spiral track (22) drives the isolation cloth (21) to rotate horizontally along the power distribution pole (4).

3. The easy-to-maintain integrated primary and secondary pole-mounted circuit breaker according to claim 2, characterized in that, The socket on the isolating knife (14) for closing with the incoming terminal (15) is a slot (142). There are slidingly connected pressure blocks (141) on both sides of the slot (142). The inner side of the pressure block (141) is pressed against the slot (142), and the outer side of the pressure block (141) extends out from the side of the isolating knife (14). A return spring is provided between the pressure block (141) and the isolating knife (14). The return spring provides the pressure block (141) with elastic force to slide into the slot (142). The top edge of the isolation cloth (21) is also provided with multiple lengthening stiffeners (213), and there are gaps between each lengthening stiffener (213). When the isolation knife (14) is closed or pre-closed, each isolation knife (14) is located in the gap of the lengthening stiffener (213).

4. The easy-to-maintain integrated primary and secondary pole-mounted circuit breaker according to claim 1, characterized in that, The circuit breaker body (1) includes three sets of outgoing terminals (11), vacuum bulbs (12), current transformers (13), isolating blades (14), and incoming terminals (15). The outgoing terminals (11) are connected to the current transformers (13) through the vacuum bulbs (12). The current transformers (13) are rotatably connected to the isolating blades (14). The isolating blades (14) are closed with the incoming terminals (15). The three vacuum bulbs (12) are mounted on the mechanism box (16). A mounting plate is also fixed on the outside of the mechanism box (16). Each incoming terminal (11) is connected to the isolating blades (14). 5) The bottom is fixed on multiple incoming line insulators (17), each incoming line insulator (17) is fixed on the mounting plate, and a crank rod (18) is rotatably provided on the mounting plate. The protrusion on the crank rod (18) is rotatably connected to one end of multiple levers (19), and the other end of each lever (19) is rotatably connected to the middle position of the corresponding isolating knife (14). A rotating pull rod is provided at the end of the crank rod (18), and pull rings are provided at both ends of the rotating pull rod. By pulling the rotating pull rod, the crank rod (18) is rotated, thereby controlling the isolating knife (14) to close or open.

5. A primary and secondary integrated pole-mounted circuit breaker for easy maintenance as described in claim 4, characterized in that, The power distribution pole (4) is fixed with an upper clamp (31) and a lower clamp (33). The lower clamp (33) is fixed with an upper support plate (32) on its side. The mechanism box (16) is fixed above the upper support plate (32). The lower clamp (33) is lower than the upper clamp (31). The lower clamp (33) is fixed with a lower support plate (34). The other end of the lower support plate (34) is fixed to the bottom of the upper support plate (32) away from the power distribution pole (4). The upper support plate (32), the lower support plate (34) and the power distribution pole (4) form a triangular support structure.

6. The easy-to-maintain integrated primary and secondary pole-mounted circuit breaker according to claim 3, characterized in that, Waterproof covers (233) are also provided on the upper and lower adjustment ring seats (23). The waterproof cover (233) on the lower adjustment ring seat (23) is fixed on the pull wire seat (231), and the waterproof cover (233) on the upper adjustment ring seat (23) is fixed on the support seat (232).

7. A primary and secondary integrated pole-mounted circuit breaker for easy maintenance as described in claim 6, characterized in that, The spiral track (22) is a multi-segment structure, and the segments of the spiral track (22) are fixed together by bolts.

8. A primary and secondary integrated pole-mounted circuit breaker for easy maintenance according to claim 6, characterized in that, Each of the pull wire holders (231), pull wire driven rings (234), support seats (232) and waterproof covers (233) is a ring structure formed by assembling two symmetrical half rings. The two half rings are fixed together by bolts or clips, which makes it easy to install pull wire holders (231), pull wire driven rings (234), support seats (232) and waterproof covers (233) on the distribution pole (4).

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