A waterproof type pole-mounted circuit breaker

Abstract

This invention discloses a waterproof pole-mounted circuit breaker, relating to the field of electrical control and protection technology. It includes an outer casing with a housing mounted at one end. A residual heat dehumidification mechanism is jointly provided inside the outer casing and on the outside of the housing. The residual heat dehumidification mechanism includes a sealed box and a housing. The housing is mounted in the middle of the side face of the housing. An impeller and a turbine are rotatably mounted inside the housing. A through hole is provided inside the housing between the impeller and the turbine. This invention achieves double-layer physical isolation of the circuit, ensuring arc extinguishing reliability while simultaneously ensuring the effectiveness of the circuit breaker's switching operation. This makes maintenance and repair work more convenient, safe, and reliable. It solves the problem that in existing technologies, circuit breakers must be placed inside a cabinet. This invention can serve as a waterproof component for circuit breakers of different specifications.

Description

Technical Field

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

[0002] Waterproof pole-mounted circuit breakers are key devices in power distribution networks used for automatic opening and closing, fault isolation, and system protection. Their intelligent control modules often integrate power electronics technology, using metal-oxide-semiconductor field-effect transistors (MOSFETs) and insulated-gate bipolar transistors (IGBTs) chips or modules as core switching devices. These power semiconductor components are widely used in the control power supply, drive circuits, and communication modules of circuit breakers to achieve efficient energy conversion and precise control. Therefore, the manufacturing technology of power electronic devices such as MOSFETs and IGBTs plays a crucial role in improving the intelligence level and reliability of pole-mounted circuit breakers. The authors have formed a close technological and industrial link in the modern power equipment manufacturing and intelligent power distribution system construction. The application number is CN202120718695.2, which proposes a moisture-proof molded case circuit breaker. It can realize the installation of a moisture-proof shell on the outside of the molded case circuit breaker. The wire passage of the moisture-proof shell is equipped with a sealing plug to prevent moisture from entering directly from the wire passage. The vent is filled with a coarse-pore sponge sheet to filter moisture. A humidity sensor is installed to monitor the internal humidity. The removable activated carbon mesh installed on both sides of the molded case circuit breaker body can absorb moisture inside the moisture-proof shell, which has a moisture-proof function and can better maintain normal operation in humid environments.

[0003] However, current circuit breakers cannot simultaneously address both sealing and waterproofing as well as internal and external heat dissipation. They cannot effectively reuse the heat generated during operation. Not only is their heat dissipation poor, easily leading to overheating and aging, but their waterproofing is also insufficient, providing only basic protection. In humid weather, condensation can easily occur, causing moisture intrusion and affecting the insulation shielding effect of the circuit breaker during operation, thus compromising its effectiveness. Summary of the Invention

[0004] This invention provides a waterproof pole-mounted circuit breaker, which effectively solves the problems mentioned in the background art. Current circuit breakers cannot simultaneously achieve both sealing and waterproofing, and internal and external heat dissipation. They cannot effectively reuse the heat dissipated during operation, resulting in poor heat dissipation and easy overheating and aging. Furthermore, their waterproofing is insufficient, providing only basic protection. In humid weather, condensation easily occurs, causing moisture intrusion and affecting the insulation shielding effect during operation, thus compromising the effectiveness of the circuit breaker.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a waterproof pole-mounted circuit breaker, comprising an outer casing, a housing installed at one end of the outer casing, and a waste heat dehumidification mechanism jointly provided inside the outer casing and outside the housing;

[0006] The waste heat dehumidification mechanism includes a sealed box and a housing;

[0007] A housing is installed in the middle of the side end face of the chassis. An impeller and a turbine are rotatably installed inside the housing. A through hole is provided inside the housing between the impeller and the turbine.

[0008] A rotating shaft is embedded and rotatably mounted on the side end face of the housing, and an air inlet pipe is installed on the side end face of the sealed box;

[0009] A flow guide box is installed on the outside of the machine box, and the flow guide box is connected to the gas supply pipe and the return pipe;

[0010] The flow guide box is equipped with a coil, several air ducts and absorbent cotton. An air cavity is opened at the end of the chassis. An I-shaped groove plate and a plug plate are arranged inside the air cavity. A rotating plate and a locking post are installed at the end of the rotating shaft.

[0011] According to the above technical solution, several insulating shielding sleeves are evenly and equidistantly installed on both sides of the outer shell. A conductive sleeve is embedded in the end of the insulating shielding sleeve, and a terminal is installed at one end of the conductive sleeve.

[0012] The outer casing is equipped with a sealed box, and an arc-extinguishing cylinder is installed inside the sealed box at the position corresponding to the conductive sleeve. A stationary contact is installed in the middle of one end of the arc-extinguishing cylinder, and a moving contact is slidably installed in the middle of the other end of the arc-extinguishing cylinder. A conduction valve is embedded in the top and bottom of the outer curved surface of the arc-extinguishing cylinder.

[0013] An air inlet pipe is installed at one end of the air duct, an exhaust pipe is installed at the top of the side end face of the air cavity, flow limiting valves are installed at the ends of both the air inlet pipe and the exhaust pipe, an air guide seat is installed on the outside of the outer shell, and a filter box is installed at the other end of the air duct.

[0014] According to the above technical solution, the guide box is vortex-shaped. The cavity inside the box located outside the impeller is connected to the cavity inside the guide box located outside the coil through the air supply pipe. The cavity inside the box located outside the turbine is connected to the top of the sealing box cavity through the air inlet pipe. The bottom of the sealing box cavity is connected to the cavity inside the guide box located outside the coil through the return pipe.

[0015] The bottom and top of the inner cavity of the sealing box are connected to the inner cavity of the arc-extinguishing cylinder through a connecting valve. The connecting valve is a one-way valve, and the bottom and top of the inner cavity of the sealing box are not directly connected. Both the inner cavity of the sealing box and the inner cavity of the arc-extinguishing cylinder are filled with SF gas.

[0016] According to the above technical solution, the space inside the housing located outside the impeller and turbine is connected by a through hole, and the impeller and turbine are fixedly connected by a rotating shaft, wherein the outer diameter of the rotating shaft is smaller than the inner diameter of the through hole.

[0017] According to the above technical solution, the coil and the air duct are both fitted with the guide box, the wall of the air duct is mesh, the air inlet pipe and the air outlet pipe are both T-shaped pipes, one end of the air duct is connected to the air cavity through the air inlet pipe and the flow limiting valve, and the air guide seat is connected to the air cavity through the air outlet pipe and the flow limiting valve. The flow limiting valve is a one-way valve.

[0018] According to the above technical solution, the rotating plate is fixedly connected to the end of the rotating shaft, the locking post fits into the groove on the I-shaped groove plate, and the distance between the plug plates is greater than the diameter of the rotating plate.

[0019] According to the above technical solution, a multi-element on / off mechanism is installed on the outside of the arc extinguishing cylinder, and the multi-element on / off mechanism includes a temperature lock cylinder;

[0020] A heat-locking cylinder is installed inside the sealed box at the outer position of the arc-extinguishing cylinder. A switch box is installed at one end of the heat-locking cylinder, and a linkage box is installed at the other end of the heat-locking cylinder. The side end faces of the switch box and the linkage box are provided with several air guide holes at equal angles along the circumference at the outer position of the arc-extinguishing cylinder. A sliding plate is slidably installed inside the switch box. A conductive seat is embedded in the middle of the side end face of the sliding plate. A power connection rod is installed at one end of the conductive seat. A linkage plate is slidably installed on the outer curved surface of the moving contact at the position inside the linkage box.

[0021] Pressure gauges are embedded in the top edges of the switch box and the linkage box. Connecting pipes are installed at the bottom edges of the switch box and the linkage box. Air nozzles are installed at the ends of the connecting pipes. Delivery pipes are symmetrically installed on the top of the outer curved surface of the temperature lock cylinder. An air box is installed at the bottom of the outer shell. A screw is rotatably installed on one side of the air box. A movable plate is slidably installed inside the air box.

[0022] A suction pipe is installed in the middle of the other end face of the air box. A flow guide valve is installed at the end of both the suction pipe and the delivery pipe. A pressure gauge is embedded in one end face of the air box near the flow guide valve. A pressure relief valve is embedded in the other end face of the air box at the position corresponding to the pressure gauge. A lever is installed at the end of the screw.

[0023] According to the above technical solution, the conductive base is slidably connected to the conductive sleeve via a power-connecting plug, the conductive base is engaged with the stationary contact, the moving contact is engaged with the conductive sleeve, and the cross-sectional area of ​​the sliding plate is the same as that of the connecting plate.

[0024] According to the above technical solution, the cavities inside the switch box and the linkage box located between the sliding plate and the connecting plate are connected to the cavity inside the heat lock cylinder located outside the arc extinguishing cylinder through the air guide hole. The cavity inside the switch box located on the other side of the sliding plate and the cavity inside the linkage box located on the other side of the connecting plate are respectively connected to two connecting pipes.

[0025] According to the above technical solution, the cavity inside the heat-locking cylinder located outside the arc-extinguishing cylinder is connected to the inner cavity of the gas box through a delivery pipe and a flow guide valve. The inner cavity of the gas box is connected to the filter box through a flow guide valve and a suction pipe. The flow guide valve consists of an inlet one-way valve, an outlet one-way valve, and a two-way valve. The outlet one-way valve and the two-way valve are respectively connected to two delivery pipes. The suction pipe is connected to the inlet one-way valve.

[0026] Compared with the prior art, the advantages of the present invention are: the present invention has a scientific and reasonable structure and is safe and convenient to use;

[0027] 1. Equipped with a residual heat dehumidification mechanism, which, in conjunction with the outer casing, sealing box, and arc-extinguishing cylinder, forms a double-sealing and triple-protection structure, effectively ensuring the stability of SF6 gas. Combined with the casing, conduction valve, impeller, turbine, through-hole, shaft, gas inlet pipe, gas delivery pipe, flow guide box, and return pipe, it can construct a traction pressurization structure, synchronously converting and utilizing the heat dissipated by the stationary and moving contacts during operation. This fully ensures the pressure sufficiency and stability of SF6 gas during operation, improving the reliability and effectiveness of arc extinguishing, significantly enhancing the insulation and shielding effect of SF6 gas, making the circuit breaker more stable during operation, effectively reducing the circuit breaker's failure rate, and promoting the circulation of SF6 gas to achieve dynamic arc extinguishing, improving the timeliness and effectiveness of arc extinguishing, and significantly increasing arc extinguishing efficiency and effect.

[0028] By combining coils, ducts, absorbent cotton, air ducts, I-shaped slot plates, plug plates, rotating plates, clamping columns, air inlet pipes, exhaust pipes, flow limiting valves, air guide seats, and filter boxes, a waste heat utilization structure can be formed. Combined with the guiding effect of the traction and pressurization structure, this structure promotes heat exchange between the inside and outside of the heat exchanger. While ensuring sealing, it significantly improves the heat exchange efficiency during circuit breaker operation, making the temperature more stable and enhancing the safety and reliability of the circuit breaker. It also fully utilizes the circuit breaker's performance, reducing the thermal aging process and effectively extending its service life. Furthermore, it fully utilizes the waste heat dissipated during circuit breaker operation, effectively reducing the temperature difference between the inside and outside of the outer casing, lowering the probability of condensation on the surface of the pole-mounted circuit breaker, and allowing hot air to blow onto the circuit breaker surface. This promotes the evaporation of moisture from the circuit breaker surface and improves the dryness of the space outside the circuit breaker, achieving dual moisture-proofing and dehumidification, and significantly improving the waterproof effect.

[0029] 2. Equipped with a multi-functional switching mechanism, the switch box, vent, sliding plate, conductive base, and connection rod work together to form a built-in isolating switch structure. Combined with stationary and moving contacts, it can effectively achieve dual switching operations of both the isolating switch and the circuit breaker. This provides dual physical switching and isolation protection during power supply and distribution, effectively improving the reliability of the circuit breaker's switching operation. It also allows the circuit breaker to operate independently without the constraints of an external isolating switch, saving space and enabling more efficient and flexible circuit switching. Furthermore, the synchronous linkage of the temperature lock cylinder, linkage box, vent, and linkage plate allows for rapid physical isolation of the circuit in case of circuit faults or overloads, greatly improving the timeliness and effectiveness of the circuit breaker's operation and making its operation more stable and efficient.

[0030] By using a pressure gauge, connecting pipe, and air nozzle in conjunction, the load pressure threshold of the circuit breaker can be adjusted and limited, allowing for flexible and efficient equivalent limitation of the circuit breaker's effective load range. This enables the circuit breaker to be applied to more types of power supply and distribution work, enhancing its flexibility and adaptability. Combined with the dynamic adjustment functions of the delivery pipe, air box, screw, movable plate, suction pipe, guide valve, pressure gauge, pressure relief valve, and lever, the dual on / off sequence of the circuit breaker can be limited, effectively reducing the technical threshold for operators in opening and closing operations. While fully utilizing the circuit breaker's primary function, it also takes into account the secondary on / off function of the disconnector, significantly improving the convenience, stability, and safety of opening and closing operations during power supply and distribution, making maintenance work safer and more reliable.

[0031] In summary, this circuit breaker can operate reliably under harsh climatic conditions, making secondary use of the residual heat generated during operation. While promoting internal and external heat exchange, it achieves dual moisture protection and dehumidification, effectively preventing moisture from seeping into the interior. This ensures that the circuit breaker will not malfunction in rainy, snowy, or humid environments. At the same time, it can achieve double-layer physical isolation of the circuit, ensuring the reliability of arc extinguishing while simultaneously ensuring the effectiveness of the circuit breaker's switching operation. This makes maintenance and repair work more convenient, safe, and reliable. It solves the problem that in existing technologies, the circuit breaker must be placed inside a cabinet. It can also serve as a waterproof component for circuit breakers of different specifications. Attached Figure Description

[0032] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof.

[0033] In the attached diagram:

[0034] Figure 1 This is a schematic diagram of the structure of the present invention;

[0035] Figure 2This is a schematic diagram of the sealing box installation structure of the present invention;

[0036] Figure 3 This is a schematic diagram of the flow guide box installation structure of the present invention;

[0037] Figure 4 This is a schematic diagram of the waste heat dehumidification mechanism of the present invention;

[0038] Figure 5 This is a schematic diagram of the I-shaped slot plate installation structure of the present invention;

[0039] Figure 6 This is a schematic diagram of the arc-extinguishing cylinder installation structure of the present invention;

[0040] Figure 7 This is a schematic diagram of the multi-way switching mechanism of the present invention;

[0041] Figure 8 This is a schematic diagram of the installation structure of the temperature-locking cylinder of the present invention;

[0042] The diagram labels are: 1. Outer casing; 11. Insulating shielding sleeve; 12. Conductive sleeve; 13. Terminal block; 14. Chassis.

[0043] 200. Waste heat dehumidification mechanism; 201. Sealed box; 202. Arc extinguishing cylinder; 203. Stationary contact; 204. Moving contact; 205. Conductor valve; 206. Machine box; 207. Impeller; 208. Turbine; 209. Through hole; 210. Rotating shaft; 211. Air inlet pipe; 212. Air delivery pipe; 213. Flow guide box; 214. Return pipe; 215. Coil; 216. Air duct; 217. Absorbent cotton; 218. Air cavity; 219. I-shaped groove plate; 220. Plug plate; 221. Rotating plate; 222. Locking column; 223. Air inlet pipe; 224. Exhaust pipe; 225. Flow restrictor valve; 226. Air guide seat; 227. Filter box;

[0044] 300. Multi-function on / off mechanism; 301. Temperature lock cylinder; 302. On / off box; 303. Linkage box; 304. Air vent; 305. Sliding plate; 306. Conductive base; 307. Power connection rod; 308. Linkage plate; 309. Pressure gauge; 310. Connecting pipe; 311. Air nozzle; 312. Delivery pipe; 313. Air box; 314. Screw; 315. Movable plate; 316. Suction pipe; 317. Flow guide valve; 318. Pressure gauge; 319. Pressure relief valve; 320. Lever. Detailed Implementation

[0045] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0046] Example: Figure 1-8As shown, the present invention provides a technical solution, a waterproof pole-mounted circuit breaker, including an outer shell 1, a plurality of insulating shielding sleeves 11 are evenly installed at equal intervals on both ends of the outer shell 1, a conductive sleeve 12 is embedded in the end of the insulating shielding sleeve 11, a terminal block 13 is installed at one end of the conductive sleeve 12, and a residual heat dehumidification mechanism 200 is provided inside the outer shell 1 and outside the chassis 14.

[0047] The waste heat dehumidification mechanism 200 includes a sealed box 201;

[0048] The outer casing 1 has a sealed box 201 installed inside. Inside the sealed box 201, at the position corresponding to the conductive sleeve 12, an arc-extinguishing cylinder 202 is installed. A stationary contact 203 is installed in the middle of one end of the arc-extinguishing cylinder 202, and a moving contact 204 is slidably installed in the middle of the other end of the arc-extinguishing cylinder 202. A conduction valve 205 is embedded in the top and bottom of the outer curved surface of the arc-extinguishing cylinder 202. A housing 14 is installed at one end of the outer casing 1.

[0049] A housing 206 is installed in the middle of the side end face of the casing 14. An impeller 207 is rotatably installed on one side of the housing 206, and a turbine 208 is rotatably installed on the other side of the housing 206. A through hole 209 is opened in the housing 206 between the impeller 207 and the turbine 208. A rotating shaft 210 is embedded in the middle of the side end face of the housing 206. The space inside the housing 206 outside the impeller 207 and the turbine 208 is connected through the through hole 209. The impeller 207 and the turbine 208 are fixedly connected by the rotating shaft 210, and the outer diameter of the rotating shaft 210 is smaller than the inner diameter of the through hole 209 to facilitate airflow and pressurization and ensure insulation and shielding effects. An air inlet pipe 211 is installed on the top of the side end face of the sealing box 201. A flow guide box 213 is installed on the outside of the housing 206. An air supply pipe 212 is installed at one end of the flow guide box 213, and a return pipe 214 is installed at the other end of the flow guide box 213.

[0050] The guide box 213 is equipped with a coil 215. The guide box 213 is vortex-shaped. The cavity inside the machine box 206 located outside the impeller 207 is connected to the cavity inside the guide box 213 located outside the coil 215 through the air supply pipe 212. The cavity inside the machine box 206 located outside the turbine 208 is connected to the top of the inner cavity of the sealing box 201 through the air inlet pipe 211. The bottom of the inner cavity of the sealing box 201 is connected to the cavity inside the guide box 213 located outside the coil 215 through the return pipe 214.

[0051] The bottom and top of the inner cavity of the sealed box 201 are connected to the inner cavity of the arc-extinguishing cylinder 202 via a guide valve 205. The guide valve 205 is a one-way valve, and the bottom and top of the inner cavity of the sealed box 201 are not directly connected. Both the inner cavities of the sealed box 201 and the arc-extinguishing cylinder 202 are filled with SF6 gas for flow restriction and guidance to utilize waste heat. Several air ducts 216 are evenly installed at equal intervals inside the coil 215. The area outside the air ducts 216 inside the coil 215 is filled with absorbent cotton 217. (The last sentence appears to be incomplete and possibly refers to a different unit, "chassis 1".) 4. An air cavity 218 is provided at the end of the rotating shaft 210. An I-shaped groove plate 219 is slidably installed inside the air cavity 218. A plug plate 220 is installed at both ends of the I-shaped groove plate 219. A rotating plate 221 is installed at the end of the rotating shaft 210. A locking post 222 is rotatably installed on the side end face of the rotating plate 221. The rotating plate 221 is fixedly connected to the end of the rotating shaft 210. The locking post 222 fits into the groove on the I-shaped groove plate 219. The distance between the plug plates 220 is greater than the diameter of the rotating plate 221 to achieve synchronous dehumidification.

[0052] An air inlet pipe 223 is installed at one end of the duct 216, and an exhaust pipe 224 is installed at the top of the side end face of the air cavity 218. Both the inlet pipe 223 and the exhaust pipe 224 are equipped with flow restricting valves 225. An air guide seat 226 is installed on the outside of the outer shell 1. The coil 215 and the duct 216 are both fitted with the flow guide box 213. The wall of the duct 216 is mesh. Both the inlet pipe 223 and the exhaust pipe 224 are three-way pipes. One end of the duct 216 is connected to the air cavity 218 through the inlet pipe 223 and the flow restricting valve 225. The air guide seat 226 is connected to the air cavity 218 through the exhaust pipe 224 and the flow restricting valve 225. The flow restricting valve 225 is a one-way valve for dual dehumidification and drying. A filter box 227 is installed at the other end of the duct 216.

[0053] An arc-extinguishing cylinder 202 is equipped with a multi-element on / off mechanism 300, which includes a temperature-locking cylinder 301.

[0054] Inside the sealed box 201, located outside the arc-extinguishing cylinder 202, a heat-locking cylinder 301 is installed. A switch box 302 is installed at one end of the heat-locking cylinder 301, and a linkage box 303 is installed at the other end. Both the switch box 302 and the linkage box 303 have several vent holes 304 at equal angles along the circumference at their side ends outside the arc-extinguishing cylinder 202. A sliding plate 305 is slidably installed inside the switch box 302, with the sliding plate 305 embedded in the center of its side end. There is a conductive base 306, and a power-connecting plug 307 is installed at one end of the conductive base 306. A connecting plate 308 is slidably installed at the position of the outer curved surface of the moving contact 204 inside the linkage box 303. The conductive base 306 is slidably connected to the conductive sleeve 12 through the power-connecting plug 307. The conductive base 306 is engaged with the stationary contact 203, and the moving contact 204 is engaged with the conductive sleeve 12. The cross-sectional area of ​​the sliding plate 305 is the same as the cross-sectional area of ​​the connecting plate 308 to perform double switching.

[0055] Pressure gauges 309 are embedded in the top edges of both the switch box 302 and the linkage box 303. Connecting pipes 310 are installed at the bottom edges of both the switch box 302 and the linkage box 303. The cavities inside the switch box 302 and the linkage box 303 located between the sliding plate 305 and the connecting plate 308 are connected to the cavity inside the heat-locking cylinder 301 located outside the arc-extinguishing cylinder 202 via air guide holes 304. The cavity inside the switch box 302 located on the other side of the sliding plate 305... The cavity inside the linkage box 303 located on the other side of the linkage plate 308 is connected to two connecting pipes 310 respectively to achieve synchronous linkage and improve the reliability of switching. A gas nozzle 311 is installed at the end of the connecting pipe 310. A delivery pipe 312 is symmetrically installed on the top of the outer curved surface of the temperature lock cylinder 301. A gas box 313 is installed at the bottom of the outer shell 1. A screw 314 is embedded and rotated on one end face of the gas box 313. A movable plate 315 is slidably installed inside the gas box 313.

[0056] A suction pipe 316 is installed in the middle of the other end face of the air box 313. Both the suction pipe 316 and the delivery pipe 312 are equipped with flow guide valves 317. The cavity inside the heat-locking cylinder 301 located outside the arc-extinguishing cylinder 202 is connected to the inner cavity of the air box 313 via the delivery pipe 312 and the flow guide valves 317. The inner cavity of the air box 313 is connected to the filter box 227 via the flow guide valves 317 and the suction pipe 316. The flow guide valves 317 consist of an inlet check valve and an outlet check valve. It consists of an air check valve and a double-way valve, and the air outlet check valve and the double-way valve are respectively connected to two delivery pipes 312. The air intake pipe 316 is connected to the air inlet check valve for maintenance. A pressure gauge 318 is embedded in one end face of the air box 313 near the guide valve 317. A pressure relief valve 319 is embedded in the other end face of the air box 313 corresponding to the pressure gauge 318. A lever 320 is installed at the end of the screw 314.

[0057] The working principle and usage process of this invention: In actual use, the outer casing 1 of this waterproof pole-mounted circuit breaker needs to be installed and fixed in the designated position using an external bracket. After completing the relevant debugging work, the power supply cable is connected to the terminal 13 on the moving contact 204 side and the power receiving cable is connected to the terminal 13 on the stationary contact 203 side. After completing the wiring installation work, the power supply and distribution work can be put into normal operation after connecting the terminal 13 on both sides. In actual use, the relevant debugging work can also be completed before installing and fixing the outer casing 1 in the designated position, depending on the actual situation.

[0058] In the initial state, the air pressure inside the switch box 302 is greater than the air pressure inside the linkage box 303, and the air pressure inside both the switch box 302 and the linkage box 303 is greater than the air pressure inside the temperature lock cylinder 301. At this time, under the pressure of the air pressure, the sliding plate 305 will provide an elastic support to the conductive base 306, forcing the conductive base 306 to connect with the stationary contact 203 and cooperate with the power connection rod 307 and the conductive sleeve 12, so that the stationary contact 203 is in a conductive state with the corresponding terminal 13. Meanwhile, under the pressure of the air pressure, the linkage plate 308 provides an elastic support to the moving contact 204, forcing the moving contact 204 to abut against the stationary contact 203, so that the terminals 13 on both sides are in a conductive state.

[0059] Before putting this circuit breaker into power distribution work, check the air pressure inside the switching box 302 and the linkage box 303 according to the reading of the corresponding air pressure gauge 309. If necessary, use an external air filling device to inject air into the switching box 302 and the linkage box 303 through the two connecting pipes 310 to adjust the air pressure inside the switching box 302 and the linkage box 303. When the wiring terminals 13 on both sides are in the conducting state, ensure the stability and effectiveness of the switching adjustment of this circuit breaker.

[0060] After the air pressure inside the switch box 302 and linkage box 303 is regulated, the double-way valve in the pressure relief valve 319 and the flow guide valve 317 is closed. The lever 320 is moved back and forth, and the movable plate 315 is driven to move back and forth inside the air box 313 through the screw 314. After the external air is filtered by the filter box 227, it is drawn into the air box 313 through the suction pipe 316 and the air inlet check valve in the flow guide valve 317. Then, it is sent into each heat lock cylinder 301 through the air supply pipe 212 connected to the air outlet check valve in the flow guide valve 317. Under the guidance of the air guide hole 304, it flows into each switch box 302 and linkage box 303, giving the sliding plate 305 and the linkage plate 308 a reverse thrust.

[0061] When the reverse thrust of the connecting plate 308 is sufficient to overcome the air pressure on its other side, it will drag the moving contact 204 away from the stationary contact 203 under the action of the reverse thrust. When the reverse thrust of the sliding plate 305 is sufficient to overcome the air pressure on its other side, it will drag the conductive base 306 away from the stationary contact 203 under the action of the reverse thrust. Here, the connecting rod 307, the conductive base 306 and the stationary contact 203 are equivalent to forming an isolating switch structure, which can cooperate with the stationary contact 203 and the moving contact 204 to double isolate the connection between the terminals 13 on both sides.

[0062] By adjusting the air pressure inside the switching box 302 and the linkage box 303 as described above, the air pressure on the other side of the linkage plate 308 is less than the air pressure on the other side of the sliding plate 305. Since the reverse thrust on the linkage plate 308 and the sliding plate 305 is always the same, the reverse thrust will first push the linkage plate 308 to move, disconnecting the connection between the stationary contact 203 and the moving contact 204, and then push the sliding plate 305 to move, disconnecting the connection between the conductive seat 306 and the stationary contact 203. Conversely, as the reverse thrust gradually decreases, since the air pressure on the other side of the sliding plate 305 is greater than the air pressure on the other side of the linkage plate 308, the sliding plate 305 will reset before the linkage plate 308, thus first connecting the connection between the conductive seat 306 and the stationary contact 203, and then connecting the connection between the stationary contact 203 and the moving contact 204.

[0063] Similarly, in the subsequent use of this circuit breaker, when it is necessary to disconnect the circuit connection for maintenance, the aforementioned steps can be followed by reciprocating the lever 320 to first disconnect the connection between the stationary contact 203 and the moving contact 204, and then disconnect the connection between the conductive base 306 and the stationary contact 203, so as to ensure the stable operation of the circuit breaker, ensure the effectiveness of the arc extinguishing operation, and achieve double circuit breaker isolation.

[0064] Similarly, during the subsequent use of the circuit breaker, the stationary contact 203 and the moving contact 204 will dissipate heat as the power supply is in operation. This heat will act on the air inside the temperature lock cylinder 301, causing the air pressure inside the temperature lock cylinder 301 to rise. Consequently, the connecting plate 308 and the sliding plate 305 will rise due to the reverse thrust. When the power supply is overloaded or other abnormal conditions cause the heat dissipated from the stationary contact 203 and the moving contact 204 to rise abnormally, the reverse thrust will exceed the critical value. At this time, under the action of the reverse thrust, the connection between the stationary contact 203 and the moving contact 204 will be disconnected first, and then the connection between the conductive base 306 and the stationary contact 203 will be disconnected, automatically cutting off the circuit.

[0065] During the aforementioned process, the displacement of the sliding plate 305 and the linkage plate 308 will also cause the air pressure on the other side to fluctuate accordingly. By comparing the readings of the air pressure gauges 309 on the switch box 302 and the linkage box 303 with the initial air pressure value, when the readings of each air pressure gauge 309 are greater than the initial value, it can be ensured that the connection between the stationary contact 203 and the moving contact 204, as well as the connection between the conductive base 306 and the stationary contact 203, is in the open state. Before connecting the power supply cable and the power receiving cable, it should be ensured that the connection between the terminals 13 on both sides is in the open state.

[0066] After the cables connecting the power supply and receiving ends are connected, the double-way valves in the pressure relief valve 319 and the flow guide valve 317 are opened. The air inside each heat-locking cylinder 301 flows into the air box 313 through the delivery pipe 312 connected to the double-way valve in the flow guide valve 317, and then flows out through the pressure relief valve 319. This reduces the reverse thrust on the linkage plate 308 and the sliding plate 305. The air pressure inside each heat-locking cylinder 301 can be limited by the reading of the pressure gauge 318. When the reading of the pressure gauge 318 is less than that of the air pressure gauge 309, it can be ensured that the connection of the terminals 13 on both sides is in the conductive state. At this time, the circuit breaker starts to work normally.

[0067] During the normal operation of this circuit breaker, as the power supply is carried out, the heat emitted from the stationary contact 203 and the moving contact 204 will cause the temperature of the SF6 gas inside the arc-extinguishing cylinder 202 to rise, and the corresponding gas pressure inside the arc-extinguishing cylinder 202 will also rise. Under the action of gas pressure, the SF6 gas will pass through the top conduction valve 205 into the sealing box 201, and then enter the cavity where the turbine 208 is located inside the housing 206 through the gas inlet pipe 211, forcing the turbine 208 to rotate accordingly. The turbine 208 will then drive the impeller 207 to rotate through the rotating shaft 210.

[0068] The impeller 207 pressurizes and pulls the SF6 gas, forcing it to enter the cavity of the impeller 207 inside the housing 206 through the through hole 209. After entering the guide box 213, the pressurized SF6 gas is forced into the guide box 213 through the gas delivery pipe 212. The pressurized SF6 gas then flows back into the bottom cavity of the sealing box 201 through the return pipe 214, and then flows back into each arc-extinguishing cylinder 202 under the conduction of the bottom guide valves 205, forming a complete SF6 gas flow cycle.

[0069] During the aforementioned process, the rotating shaft 210 will also drive the rotating plate 221 to rotate, forcing the I-shaped slot plate 219 to drag the plug plate 220 back and forth inside the air cavity 218 under the drive of the clamping post 222. This forces the external cold air to be filtered by the filter box 227 and then drawn into the air cavity 218 through the air duct 216, the air inlet pipe 223 and the flow limiting valve 225. During the process of the cold air flowing through the air duct 216, it will absorb the heat emitted by the SF6 gas outside the coil 215 and turn it into hot air. The hot air will finally be pressed into the air guide seat 226 through the flow limiting valve 225 and the exhaust pipe 224. After being split twice by the air guide seat 226, it will be sprayed out and evenly blown onto the surface of the outer shell 1.

[0070] During the aforementioned process, the cold air absorbs the heat emitted by the SF6 gas, which can promote the heat dissipation of the SF6 gas during the circulation process. This quickly dissipates the heat emitted by the stationary contact 203 and the moving contact 204 during operation, improving the heat dissipation efficiency of the circuit breaker during operation. This ensures the stability of the circuit breaker's operation while maintaining its sealing performance.

[0071] The cold air absorbs the heat emitted by SF6 gas and converts it into hot airflow. After being ejected through the air guide seat 226, it can reduce the temperature difference between the inside and outside of the outer casing 1, and prevent condensation from forming on the surface of the circuit breaker due to excessive air humidity in humid weather. In addition, the blowing of the hot airflow will further promote the evaporation of moisture on the outside of the outer casing 1, which can greatly enhance the dryness of the outside of the outer casing 1 and effectively improve the waterproof effect. As the air flows through the air duct 216, the moisture it carries will be absorbed by the water-absorbing cotton 217, and the heat emitted by SF6 gas will also promote the evaporation of moisture, which can ensure that the hot airflow is always in a dry state, further improving the waterproof performance.

[0072] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waterproof pole-mounted circuit breaker, comprising an outer casing (1), characterized in that: The outer shell (1) is equipped with a housing (14) at one end, and a waste heat dehumidification mechanism (200) is provided inside the outer shell (1) and outside the housing (14). The waste heat dehumidification mechanism (200) includes a sealed box (201) and a housing (206); A housing (206) is installed in the middle of the side end face of the chassis (14). An impeller (207) and a turbine (208) are rotatably installed inside the housing (206). A through hole (209) is provided inside the housing (206) between the impeller (207) and the turbine (208). A rotating shaft (210) is embedded and rotatably mounted on the side end face of the housing (206), and an air inlet pipe (211) is mounted on the side end face of the sealing box (201). A flow guide box (213) is installed on the outside of the housing (206), and the flow guide box (213) is connected to an air supply pipe (212) and a return pipe (214). The flow guide box (213) is equipped with a coil (215), several air ducts (216) and absorbent cotton (217). An air cavity (218) is opened at the end of the chassis (14). An I-shaped groove plate (219) and a plug plate (220) are provided inside the air cavity (218). A rotating plate (221) and a locking post (222) are installed at the end of the rotating shaft (210). The outer shell (1) has several insulating shielding sleeves (11) evenly installed at equal intervals on both sides. A conductive sleeve (12) is embedded in the end of the insulating shielding sleeve (11), and a terminal block (13) is installed at one end of the conductive sleeve (12). The outer shell (1) is equipped with a sealing box (201). Inside the sealing box (201), an arc-extinguishing cylinder (202) is installed at the position corresponding to the conductive sleeve (12). A stationary contact (203) is installed in the middle of one end of the arc-extinguishing cylinder (202). A moving contact (204) is slidably installed in the middle of the other end of the arc-extinguishing cylinder (202). A conduction valve (205) is embedded in the top and bottom of the outer curved surface of the arc-extinguishing cylinder (202). An air inlet pipe (223) is installed at one end of the air duct (216), an exhaust pipe (224) is installed at the top of the side end face of the air cavity (218), a flow limiting valve (225) is installed at the ends of the air inlet pipe (223) and the exhaust pipe (224), an air guide seat (226) is installed on the outside of the outer shell (1), and a filter box (227) is installed at the other end of the air duct (216).

2. The waterproof pole-mounted circuit breaker according to claim 1, characterized in that, The flow guide box (213) is vortex-shaped. The cavity inside the housing (206) located outside the impeller (207) is connected to the cavity inside the flow guide box (213) located outside the coil (215) through the air supply pipe (212). The cavity inside the housing (206) located outside the turbine (208) is connected to the top of the inner cavity of the sealing box (201) through the air inlet pipe (211). The bottom of the inner cavity of the sealing box (201) is connected to the cavity inside the flow guide box (213) located outside the coil (215) through the return pipe (214). The bottom and top of the inner cavity of the sealing box (201) are connected to the inner cavity of the arc-extinguishing cylinder (202) through a connecting valve (205). The connecting valve (205) is a one-way valve, and the bottom and top of the inner cavity of the sealing box (201) are not directly connected. The inner cavities of the sealing box (201) and the arc-extinguishing cylinder (202) are both filled with SF6 gas.

3. A waterproof pole-mounted circuit breaker according to claim 2, characterized in that, The space inside the housing (206) located outside the impeller (207) and turbine (208) is connected by a through hole (209). The impeller (207) and turbine (208) are fixedly connected by a rotating shaft (210), and the outer diameter of the rotating shaft (210) is smaller than the inner diameter of the through hole (209).

4. A waterproof pole-mounted circuit breaker according to claim 2, characterized in that, The coil (215) and the air duct (216) are both fitted with the flow guide box (213). The wall of the air duct (216) is mesh. The air inlet pipe (223) and the exhaust pipe (224) are both three-way pipes. One end of the air duct (216) is connected to the air cavity (218) through the air inlet pipe (223) and the flow limiting valve (225). The air guide seat (226) is connected to the air cavity (218) through the exhaust pipe (224) and the flow limiting valve (225). The flow limiting valve (225) is a one-way valve.

5. A waterproof pole-mounted circuit breaker according to claim 2, characterized in that, The rotating plate (221) is fixedly connected to the end of the rotating shaft (210), the locking post (222) fits into the slot on the I-shaped groove plate (219), and the distance between the plug plates (220) is greater than the diameter of the rotating plate (221).

6. A waterproof pole-mounted circuit breaker according to claim 2, characterized in that, The arc-extinguishing cylinder (202) is equipped with a multi-element on / off mechanism (300), which includes a temperature-locking cylinder (301). A temperature-locking cylinder (301) is installed inside the sealed box (201) at the position outside the arc-extinguishing cylinder (202). A switch box (302) is installed at one end of the temperature-locking cylinder (301), and a linkage box (303) is installed at the other end of the temperature-locking cylinder (301). Several air guide holes (304) are opened at equal angles along the circumference at the side end faces of the switch box (302) and the linkage box (303) at the position outside the arc-extinguishing cylinder (202). A sliding plate (305) is slidably installed inside the switch box (302). A conductive seat (306) is embedded in the middle of the side end face of the sliding plate (305). A power connection plug (307) is installed at one end of the conductive seat (306). A linkage plate (308) is slidably installed on the outer curved surface of the moving contact (204) at the position inside the linkage box (303). Pressure gauges (309) are embedded in the top edge of the switch box (302) and the linkage box (303). Connecting pipes (310) are installed at the bottom edge of the switch box (302) and the linkage box (303). Air nozzles (311) are installed at the end of the connecting pipes (310). Delivery pipes (312) are symmetrically installed on the top of the outer curved surface of the temperature lock cylinder (301). An air box (313) is installed at the bottom of the outer shell (1). A screw (314) is embedded and rotated on one side of the air box (313). A movable plate (315) is slidably installed inside the air box (313). A suction pipe (316) is installed in the middle of the other end face of the air box (313). A flow guide valve (317) is installed at the end of both the suction pipe (316) and the delivery pipe (312). A pressure gauge (318) is embedded in one end face of the air box (313) near the flow guide valve (317). A pressure relief valve (319) is embedded in the other end face of the air box (313) at the position corresponding to the pressure gauge (318). A lever (320) is installed at the end of the screw (314).

7. A waterproof pole-mounted circuit breaker according to claim 6, characterized in that, The conductive base (306) is slidably connected to the conductive sleeve (12) via the power connection plug (307). The conductive base (306) is engaged with the stationary contact (203), and the moving contact (204) is engaged with the conductive sleeve (12). The cross-sectional area of ​​the sliding plate (305) is the same as that of the connecting plate (308).

8. A waterproof pole-mounted circuit breaker according to claim 6, characterized in that, The cavities inside the switch box (302) and the linkage box (303) located between the sliding plate (305) and the connecting plate (308) are connected to the cavity inside the heat-locking cylinder (301) located outside the arc-extinguishing cylinder (202) through the air guide hole (304). The cavity inside the switch box (302) located on the other side of the sliding plate (305) and the cavity inside the linkage box (303) located on the other side of the connecting plate (308) are respectively connected to two connecting pipes (310).

9. A waterproof pole-mounted circuit breaker according to claim 6, characterized in that, The cavity inside the heat-locking cylinder (301) located outside the arc-extinguishing cylinder (202) is connected to the inner cavity of the gas box (313) through the delivery pipe (312) and the flow guide valve (317). The inner cavity of the gas box (313) is connected to the filter box (227) through the flow guide valve (317) and the suction pipe (316). The flow guide valve (317) consists of an inlet one-way valve, an outlet one-way valve and a two-way valve. The outlet one-way valve and the two-way valve are respectively connected to the two delivery pipes (312). The suction pipe (316) is connected to the inlet one-way valve.

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