Waterproof pole-mounted circuit breaker

Abstract

The invention discloses a waterproof pole-mounted circuit breaker, and relates to the technical field of electrical control protection, and the waterproof pole-mounted circuit breaker comprises an outer protection shell, one end of the outer protection shell is provided with a case, the interior of the outer protection shell and the outer side of the case are jointly provided with a waste heat dehumidification mechanism, and the waste heat dehumidification mechanism comprises a sealing box and a machine box; a machine box is installed in the middle of the side end face of the machine box, an impeller and a turbine are rotationally installed in the machine box, and a through hole is formed in the position, between the impeller and the turbine, in the machine box. Double-layer physical on-off isolation of a circuit can be achieved, the effectiveness of on-off work of a circuit breaker can be ensured while the arc extinguishing reliability is guaranteed, and the service life of the circuit breaker is prolonged. Therefore, the maintenance work is more convenient, safer and more reliable, and the problem that the circuit breaker must be placed in the cabinet body in the prior art and can be used as a waterproof part of the circuit breaker to be used for circuit breakers of different specifications is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical control and protection, in particular to a waterproof pole-mounted circuit breaker. Background Art

[0002] Waterproof pole-mounted circuit breakers are key devices used in distribution networks to achieve automatic opening and closing, fault isolation, and system protection. In their intelligent control modules, power electronics technology is often integrated, 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 an important role in improving the intelligence level and reliability of pole-mounted circuit breakers. The authors have formed a close technical and industrial connection in the manufacturing of modern power equipment and the construction of intelligent distribution systems. The application number is: CN202120718695.2. A moisture-proof molded case circuit breaker is proposed, which can be provided with a moisture-proof shell outside the molded case circuit breaker. The wire opening of the moisture-proof shell is equipped with a sealing plug to prevent water vapor from directly entering from the wire opening. A coarse-pore sponge sheet is installed in the vent hole to filter water vapor. A humidity sensor head is provided to monitor the internal humidity. The detachable activated carbon mesh installed on both sides of the molded case circuit breaker body can absorb water vapor inside the moisture-proof shell, which has a moisture-proof function and can better maintain normal operation in a humid environment.

[0003] However, current circuit breakers are unable to balance sealing and waterproofing with internal and external heat dissipation, and are unable to effectively reutilize the heat generated during operation. Not only is the heat dissipation effect during operation poor, which can easily cause overheating and aging of the circuit breaker, but the waterproof effect during operation is also insufficient, providing only basic protection. In humid weather, condensation is easily generated and water vapor intrusion occurs, affecting the insulation shielding effect during the operation of the circuit breaker, making it impossible to guarantee the effectiveness of the circuit breaker. Summary of the Invention

[0004] The present invention provides a waterproof pole-mounted circuit breaker, which can effectively solve the problem raised in the above-mentioned background technology that the current circuit breaker cannot take into account both sealing and waterproofing work and internal and external heat dissipation work, and cannot effectively recycle the heat emitted during operation. Not only is the heat dissipation effect during operation poor, which easily causes overheating and aging of the circuit breaker, but its waterproof effect during operation is also insufficient, and it only provides basic protection. In humid weather, condensation is easily generated and water vapor intrusion occurs, affecting the insulation shielding effect during the operation of the circuit breaker, making it impossible to ensure the effectiveness of the circuit breaker.

[0005] To achieve the above object, the present invention provides the following technical solution: a waterproof pole-mounted circuit breaker, comprising an outer protective shell, a chassis mounted on one end of the outer protective shell, and a waste heat dehumidification mechanism disposed both inside the outer protective shell and outside the chassis;

[0006] The waste heat dehumidification mechanism includes a sealing box and a machine box;

[0007] An organic box is installed in the middle of the side end surface of the chassis, an impeller and a turbine are rotatably installed inside the box, and a through hole is opened inside the box at a position between the impeller and the turbine;

[0008] The side end surface of the machine box is embedded with a rotating shaft for rotation, and the side end surface of the sealing box is installed with an air pipe;

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

[0010] The guide box is internally installed with a coil, several air ducts and absorbent cotton, an air cavity is opened at the end of the chassis, an I-shaped slot plate and a plug plate are arranged inside the air cavity, and a rotating plate and a clamping column are installed at the end of the rotating shaft.

[0011] According to the above technical solution, a number of insulating shielding sleeves are evenly and equidistantly installed on both side end surfaces of the outer shell, and 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] A sealing box is installed inside the outer protective shell, an arc extinguishing cylinder is installed at the position corresponding to the conductive sleeve inside the sealing box, a static contact is installed in the middle of one end of the arc extinguishing cylinder, a moving contact is embedded and slidably installed in the middle of the other end of the arc extinguishing cylinder, and a conduction valve is embedded and installed on 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 on the top of the air cavity side end surface, flow limiting valves are installed at the ends of the air inlet pipe and the exhaust pipe, an air guide seat is installed on the outside of the outer protective 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 machine 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 machine box located outside the turbine is connected to the top of the sealing box cavity through the air connection pipe, and 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 both connected to the inner cavity of the arc extinguishing tube through a conduction valve. The conduction valve is a one-way valve, and the bottom and top of the inner cavity of the sealing box are not directly connected. The inner cavities of the sealing box and the arc extinguishing tube are both filled with SF gas.

[0016] According to the above technical solution, the space inside the box outside the impeller and the turbine is connected through a through hole, the impeller and the turbine are fixedly connected by a rotating shaft, and 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 matched with the guide box, the wall of the air duct is meshed, the air inlet pipe and the exhaust pipe are both three-way 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 exhaust pipe and the flow limiting valve, and 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 clamping column fits into the notch on the I-shaped slot plate, and the spacing 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 outside the arc extinguishing cylinder, and the multi-element on-off mechanism includes a temperature locking cylinder;

[0020] A temperature-locking cylinder is installed inside the sealing box at the outer side of the arc-extinguishing cylinder, a switch box is installed at one end of the temperature-locking cylinder, and a linkage box is installed at the other end of the temperature-locking cylinder. The side end surfaces of the switch box and the linkage box are located at the outer side of the arc-extinguishing cylinder and are provided with a plurality of air guide holes at equal angles along the circumferential direction. A sliding plate is slidably installed inside the switch box, a conductive seat is embedded in the middle of the side end surface of the sliding plate, a power connection rod is installed at one end of the conductive seat, and a linkage plate is slidably installed on the outer curved surface of the moving contact located inside the linkage box;

[0021] The top edges of the on-off box and the linkage box are both embedded with a pressure gauge, the bottom edges of the on-off box and the linkage box are both installed with a connecting pipe, the end of the connecting pipe is installed with a gas nozzle, the top of the outer curved surface of the temperature lock cylinder is symmetrically installed with a delivery pipe, the bottom end of the outer protective shell is installed with an air box, one end surface of the air box is embedded with a screw for rotation, and a movable plate is slidably installed inside the air box;

[0022] An air suction pipe is installed in the middle of the other end face of the air box, and diversion valves are installed at the ends of the air suction pipe and the delivery pipe. A pressure gauge is embedded in the end face of one side of the air box near the diversion valve, and a pressure relief valve is embedded in the position of the pressure gauge on the other end face of the air box, and a shift rod is installed at the end of the screw.

[0023] According to the above technical solution, the conductive seat is slidably connected to the conductive sleeve through the power plug rod, the conductive seat fits with the static contact, the moving contact fits with the conductive sleeve, and the cross-sectional area of the sliding plate is the same as that of the linkage plate.

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

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

[0026] Compared with the prior art, the present invention has the following beneficial effects: the structure of the present invention is scientific and reasonable, and the use is safe and convenient;

[0027] 1. It is equipped with a waste heat dehumidification mechanism. Through the cooperation of the outer shell, sealing box and arc extinguishing cylinder, a double seal and triple protection structure can be formed, which can effectively ensure the stability of SF6 gas. In conjunction with the machine box, conduction valve, impeller, turbine, through hole, rotating shaft, gas connection pipe, gas transmission pipe, guide box and return pipe, a traction and boosting structure can be constructed. The heat emitted during the working process of the static contact and the moving contact can be synchronously converted and utilized, which can fully ensure the pressure adequacy and stability of the SF6 gas during the working process, improve the reliability and effectiveness of the arc extinguishing work, greatly enhance the insulation shielding effect of SF6 gas, make the circuit breaker more stable during operation, effectively reduce the failure rate of the circuit breaker, and promote the circulation of SF6 gas to achieve dynamic arc extinguishing, improve the timeliness and effectiveness of arc extinguishing work, and greatly improve the arc extinguishing efficiency and arc extinguishing effect;

[0028] By coordinating the coil, air duct, absorbent cotton, air cavity, I-shaped slot plate, plug plate, rotating plate, clamping column, air inlet pipe, exhaust pipe, flow limiting valve, air guide seat, and filter box, a waste heat utilization structure can be formed. Combined with the drainage effect of the traction and pressurization structure, it can promote heat exchange between the inside and outside of the heat exchanger, while ensuring the sealing, and greatly improve the heat exchange efficiency during the operation of the circuit breaker, so that the temperature during the operation of the circuit breaker is more stable, and the safety and reliability of the circuit breaker are improved. While fully exerting the working performance of the circuit breaker, it can reduce the thermal aging process of the circuit breaker and equivalently extend the effective service life of the circuit breaker. On the other hand, it can fully utilize the waste heat dissipated during the operation of the circuit breaker, effectively reduce the temperature difference between the inside and outside of the outer casing, and reduce the probability of condensation forming on the surface of the pole-mounted circuit breaker. Hot air can be blown to the surface of the circuit breaker, which promotes the evaporation of moisture on the surface of the circuit breaker and improves the dryness of the space outside the circuit breaker, achieving double moisture-proof and dehumidification, and greatly improving the waterproof effect.

[0029] 2. It is equipped with a multi-element on-off mechanism. By cooperating with the on-off box, air guide hole, sliding plate, conductive seat and power plug rod, a built-in isolating switch structure can be formed. In conjunction with the static contact and the moving contact, it can equivalently realize the dual on-off work of the isolating switch and the circuit breaker, and realize the dual physical on-off isolation protection of the circuit in the power supply and distribution process, which can effectively improve the reliability of the on-off work of the circuit breaker and enable the circuit breaker to get rid of the constraints of the external isolating switch and work independently, saving space and making the circuit breaker more efficient and flexible in on-off work of the circuit. In addition, the synchronous linkage of the temperature lock cylinder, linkage box, air guide hole and linkage plate can realize the rapid physical isolation of the circuit in the event of circuit fault and overload, which greatly improves the timeliness and effectiveness of the circuit breaking work during the operation of the circuit breaker, and makes the operation of the circuit breaker more stable and efficient.

[0030] Through the coordination of the pressure gauge, connecting pipe and air nozzle, the load pressure threshold of the circuit breaker can be adjusted and limited, and the effective load range of the circuit breaker can be flexibly and efficiently limited, so that the circuit breaker can be applied to more types of power supply and distribution work, and the flexible adaptability of the circuit breaker is improved. Equipped with the dynamic adjustment function of the conveying pipe, air box, screw, movable plate, suction pipe, diverter valve, pressure gauge, pressure relief valve and lever, the double on-off sequence of the circuit breaker can be limited, effectively reducing the technical threshold restrictions on the operator for the opening and closing work, while making full use of the main functions of the circuit breaker and taking into account the secondary on-off function of the disconnector, it can greatly improve the convenience, stability and safety of the opening and closing work in the power supply and distribution process, making the inspection and maintenance work safer and more reliable.

[0031] To sum up, the circuit breaker can work reliably under adverse climatic conditions, reutilize the waste heat emitted during the operation of the circuit breaker, and achieve double moisture-proof and dehumidification while promoting internal and external heat exchange, effectively preventing moisture from penetrating into the interior, ensuring that the circuit breaker does not malfunction in rainy, snowy weather or humid environments. At the same time, it can achieve double-layer physical on-off isolation of the circuit, while ensuring the reliability of arc extinguishing, it can also ensure the effectiveness of the on-off work of the circuit breaker, making inspection and maintenance work more convenient, safe and reliable, and solving the problem in the existing technology that the circuit breaker must be placed inside the cabinet. It can be used as a waterproof component of the circuit breaker and can be used for circuit breakers of different specifications. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0033] In the attached figure:

[0034] Figure 1 It is a structural schematic diagram 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 installation structure of the guide box of the present invention;

[0037] Figure 4 This is a schematic structural 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 tube installation structure of the present invention;

[0040] Figure 7 This is a schematic structural diagram of the multi-element on-off 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] Numbers in the figure: 1, outer shell; 11, insulating shielding sleeve; 12, conductive sleeve; 13, terminal block; 14, chassis;

[0043] 200, residual heat dehumidification mechanism; 201, sealing box; 202, arc extinguishing cylinder; 203, static contact; 204, moving contact; 205, conduction valve; 206, machine box; 207, impeller; 208, turbine; 209, through hole; 210, rotating shaft; 211, air connection pipe; 212, air supply pipe; 213, flow guide box; 214, return pipe; 215, coil; 216, air duct; 217, absorbent cotton; 218, air cavity; 219, I-shaped slot plate; 220, plug plate; 221, rotating plate; 222, clamping column; 223, air inlet pipe; 224, exhaust pipe; 225, flow limiting valve; 226, air guide seat; 227, filter box;

[0044] 300. Multi-element on-off mechanism; 301. Temperature-locking cylinder; 302. On-off box; 303. Linkage box; 304. Air guide hole; 305. Sliding plate; 306. Conductive seat; 307. Power plug; 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. Diversion valve; 318. Pressure gauge; 319. Pressure relief valve; 320. Lever. DETAILED DESCRIPTION

[0045] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0046] Example: Figure 1-8As shown, the present invention provides a technical solution, a waterproof pole-mounted circuit breaker, comprising an outer shell 1, with a plurality of insulating shielding sleeves 11 evenly and equidistantly installed on both end surfaces of the outer shell 1, a conductive sleeve 12 embedded in the end of the insulating shielding sleeve 11, and a terminal 13 installed at one end of the conductive sleeve 12, and a waste heat dehumidification mechanism 200 disposed both inside the outer shell 1 and outside the chassis 14;

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

[0048] A sealing box 201 is installed inside the outer protective shell 1, and an arc extinguishing tube 202 is installed at the position corresponding to the conductive sleeve 12 inside the sealing box 201. A static contact 203 is installed in the middle of one end of the arc extinguishing tube 202, and a moving contact 204 is embedded and slidably installed in the middle of the other end of the arc extinguishing tube 202. A conduction valve 205 is embedded and installed on the top and bottom of the outer curved surface of the arc extinguishing tube 202, and an engine box 14 is installed at one end of the outer protective shell 1.

[0049] An organic box 206 is installed in the middle of the side end surface of the chassis 14, and an impeller 207 is rotatably installed on one side of the machine box 206, and a turbine 208 is rotatably installed on the other side of the machine box 206. A through hole 209 is opened in the machine box 206 at a position between the impeller 207 and the turbine 208. A rotating shaft 210 is embedded and rotatably installed in the middle of the side end surface of the machine box 206. The space inside the machine box 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 perform drainage and pressurization to ensure the insulation shielding effect. An air receiving pipe 211 is installed on the top of the side end surface of the sealed box 201, and a guide box 213 is installed on the outside of the machine box 206. An air supply pipe 212 is installed at one end of the guide box 213, and a return pipe 214 is installed at the other end of the guide box 213;

[0050] A coil 215 is installed inside the guide box 213. 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 via 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 via the air connection 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 via the return pipe 214.

[0051] The bottom and top of the inner cavity of the sealed box 201 are both connected to the inner cavity of the arc extinguishing tube 202 through the conduction valve 205. The conduction 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. The inner cavities of the sealed box 201 and the arc extinguishing tube 202 are filled with SF6 gas to limit the flow and guide the waste heat. A number of air ducts 216 are evenly installed inside the coil 215. The outer side of the air duct 216 inside the coil 215 is filled with absorbent cotton 217. The chassis 1 An air cavity 218 is provided at the end of the rotating shaft 210. An I-shaped slot plate 219 is slidably mounted inside the air cavity 218. A plug plate 220 is mounted at both ends of the I-shaped slot plate 219. A rotating plate 221 is mounted at the end of the rotating shaft 210. A clamping column 222 is rotatably mounted on the side edge of the rotating plate 221. The rotating plate 221 is fixedly connected to the end of the rotating shaft 210. The clamping column 222 fits into the notch on the I-shaped slot plate 219. The spacing between the plug plates 220 is greater than the diameter of the rotating plate 221, thereby achieving synchronous dehumidification.

[0052] An air inlet pipe 223 is installed at one end of the air duct 216, and 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 end of the air inlet pipe 223 and the exhaust pipe 224. An air guide seat 226 is installed on the outside of the outer protective shell 1. The coil 215 and the air duct 216 are both matched with the guide box 213. The pipe wall of the air duct 216 is meshed. 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, and 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 for double dehumidification and drying. A filter box 227 is installed at the other end of the air duct 216.

[0053] A multi-element on-off mechanism 300 is installed outside the arc extinguishing cylinder 202, and the multi-element on-off mechanism 300 includes a temperature locking cylinder 301;

[0054] A temperature lock cylinder 301 is installed inside the sealing box 201 at the outer side of the arc extinguishing cylinder 202. A switch box 302 is installed at one end of the temperature lock cylinder 301, and a linkage box 303 is installed at the other end of the temperature lock cylinder 301. The side surfaces of the switch box 302 and the linkage box 303 are located at the outer side of the arc extinguishing cylinder 202 and are provided with a plurality of air guide holes 304 at equal angles along the circumferential direction. A sliding plate 305 is slidably installed inside the switch box 302, and the middle of the side surface of the sliding plate 305 is embedded and installed. There is a conductive seat 306, one end of which is installed with a power plug rod 307. The outer curved surface of the movable contact 204 is located inside the linkage box 303 and is slidably installed with a linkage plate 308. The conductive seat 306 is slidably connected to the conductive sleeve 12 through the power plug rod 307. The conductive seat 306 fits with the static contact 203, and the movable contact 204 fits with the conductive sleeve 12. The cross-sectional area of the sliding plate 305 is the same as that of the linkage plate 308, so as to achieve double switching.

[0055] The top edges of the on-off box 302 and the linkage box 303 are embedded with a pressure gauge 309, and the bottom edges of the on-off box 302 and the linkage box 303 are installed with a connecting pipe 310. The cavities between the sliding plate 305 and the linkage plate 308 inside the on-off box 302 and the linkage box 303 are connected to the cavity outside the arc extinguishing cylinder 202 inside the temperature lock cylinder 301 through the air guide hole 304. The cavity inside the on-off box 302 on the other side of the sliding plate 305 is connected to the cavity outside the arc extinguishing cylinder 202. The cavity inside the linkage box 303 on the other side of the linkage plate 308 is connected to two connecting pipes 310 respectively for synchronous linkage and improved on-off reliability. 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. An air box 313 is installed at the bottom end of the outer protective shell 1. A screw 314 is embedded in the end surface of one side of the air box 313 and is rotatably installed. A movable plate 315 is slidably installed inside the air box 313.

[0056] An air suction pipe 316 is installed in the middle of the other end face of the air box 313. A guide valve 317 is installed at the end of the air suction pipe 316 and the delivery pipe 312. The cavity inside the temperature lock cylinder 301 located outside the arc extinguishing cylinder 202 is connected to the inner cavity of the air box 313 through the delivery pipe 312 and the guide valve 317. The inner cavity of the air box 313 is connected to the filter box 227 through the guide valve 317 and the air suction pipe 316. The guide valve 317 is composed of an air inlet check valve, an outlet check valve, and a check valve. It consists of an air one-way valve and a two-way valve, and the air outlet one-way valve and the two-way valve are respectively connected to the two delivery pipes 312, and the air suction pipe 316 is connected to the air inlet one-way valve for inspection and maintenance. A pressure gauge 318 is embedded in the end face of one side of the air box 313 near the side of the guide valve 317, and a pressure relief valve 319 is embedded in the position of the pressure gauge 318 on the other end face of the air box 313, and a lever 320 is installed at the end of the screw 314.

[0057] The working principle and use process of the present invention: When the waterproof pole-mounted circuit breaker is actually used, the outer shell 1 needs to be installed and fixed to the specified position using an external bracket. After completing the relevant debugging work, the cable at the power supply end is connected to the wiring terminal 13 on the side of the moving contact 204, and the cable at the power receiving end is connected to the wiring terminal 13 on the side of the static contact 203. After completing the wiring installation work and connecting the wiring terminals 13 on both sides, the power supply and distribution work can be put into normal operation. In actual use, according to actual conditions, the relevant debugging work can be completed before the outer shell 1 is installed and fixed to the specified position.

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

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

[0060] After the air pressure inside the on-off box 302 and the linkage box 303 is regulated, the pressure relief valve 319 and the two-way valve in the diverter valve 317 are closed, and the lever 320 is toggled back and forth, driving the movable plate 315 to move back and forth inside the air box 313 via the screw 314. After being filtered by the filter box 227, the external air is drawn into the air box 313 through the air suction pipe 316 and the air inlet check valve in the diverter valve 317, and then sent into each temperature locking cylinder 301 through the air supply pipe 212 connected to the air outlet check valve in the diverter valve 317. Under the conduction of the air guide hole 304, the air flows into each on-off box 302 and the linkage box 303, giving reverse thrust to the sliding plate 305 and the linkage plate 308.

[0061] When the reverse thrust applied to the linkage plate 308 is sufficient to overcome the air pressure on the other side thereof, the linkage plate 308 will drag the movable contact 204 away from the stationary contact 203 under the action of the reverse thrust. When the reverse thrust applied to the sliding plate 305 is sufficient to overcome the air pressure on the other side thereof, the linkage plate 308 will drag the conductive base 306 away from the stationary contact 203 under the action of the reverse thrust. Here, the power plug 307, the conductive base 306 and the stationary contact 203 together constitute an isolating switch structure, which can cooperate with the stationary contact 203 and the movable contact 204 to double-isolate the connection between the terminal blocks 13 on both sides.

[0062] By adjusting the air pressure inside the on-off 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 linkage plate 308 and the sliding plate 305 are always subjected to the same reverse thrust, the reverse thrust will first push the linkage plate 308 to move, disconnecting the static 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 static contact 203. Conversely, in the process of gradually reducing the reverse thrust, 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, thereby first connecting the connection between the conductive seat 306 and the static contact 203, and then connecting the connection between the static contact 203 and the moving contact 204.

[0063] Similarly, in the subsequent use of the circuit breaker, when it is necessary to disconnect the circuit for maintenance and repair, the aforementioned steps can be followed by reciprocating the lever 320 to disconnect the static contact 203 and the movable contact 204 first, and then disconnect the conductive base 306 from the static contact 203, thereby ensuring the stability of the circuit breaker operation, ensuring the effectiveness of the arc extinguishing operation, and achieving double circuit breaking isolation.

[0064] Similarly, during the subsequent use of the circuit breaker, the static contact 203 and the moving contact 204 will emit heat as the power supply is carried out, and the emitted heat will act on the air inside the temperature lock cylinder 301, causing the air pressure inside the temperature lock cylinder 301 to rise. The corresponding linkage plate 308 and the sliding plate 305 will rise accordingly due to the reverse thrust. When the power supply is overloaded or other abnormal conditions occur, causing the heat emitted from the static 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 static contact 203 and the moving contact 204 will be disconnected first, and then the connection between the conductive base 306 and the static contact 203 will be disconnected, and the circuit will be automatically cut off.

[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 thereof to fluctuate accordingly. The readings of the pressure gauges 309 on the on-off box 302 and the linkage box 303 are compared with the initial air pressure value. When the readings of the pressure gauges 309 are greater than the initial values, it is ensured that the connection between the static contact 203 and the moving contact 204, as well as between the conductive base 306 and the static contact 203, is disconnected. Before connecting the power supply cable and the power receiving cable, it should be ensured that the connection between the terminal blocks 13 on both sides is disconnected.

[0066] After completing the connection of the cables at the power supply end and the power receiving end, the pressure relief valve 319 and the two-way valve in the diversion valve 317 are opened. The air inside each temperature lock cylinder 301 will flow into the air box 313 through the delivery pipe 312 connected to the two-way valve in the diversion valve 317, and then flow out through the pressure relief valve 319, causing the reverse thrust on the linkage plate 308 and the sliding plate 305 to be reduced. The pressure inside each temperature lock cylinder 301 can be limited by the reading on the pressure gauge 318. When the reading on the pressure gauge 318 is lower than that on the pressure gauge 309, it can be ensured that the connection of the terminal blocks 13 on both sides is in the conductive state, and the circuit breaker starts to work normally.

[0067] During normal operation of the circuit breaker, as power is supplied, the heat emitted from the static contact 203 and the moving contact 204 causes the temperature of the SF6 gas inside the arc extinguishing tube 202 to rise. Consequently, the pressure inside the arc extinguishing tube 202 also rises. Under the action of the pressure, the SF6 gas passes through the top conduction valve 205 and enters the sealed box 201. The gas then enters the cavity inside the housing 206 where the turbine 208 is located via the gas connection pipe 211, forcing the turbine 208 to rotate accordingly. The turbine 208 then drives the impeller 207 to rotate via the rotating shaft 210.

[0068] The impeller 207 pressurizes and pulls the SF6 gas, forcing it into the cavity inside the housing 206 where the impeller 207 is located through the through hole 209. The gas is then pressed into the guide box 213 at a higher pressure through the gas pipe 212. The pressurized SF6 gas then flows back into the bottom cavity of the sealed box 201 through the return pipe 214. Subsequently, the gas flows back into each arc extinguishing tube 202 under the conduction of the conduction valve 205 at the bottom, forming a complete SF6 gas flow cycle.

[0069] During the above process, the rotating shaft 210 also drives the rotating plate 221 to rotate, forcing the I-shaped slot plate 219 to drag the plug plate 220 to move back and forth inside the air cavity 218 under the drive of the clamping column 222, forcing 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. In the process of the cold air flowing through the air duct 216, it absorbs the heat emitted by the SF6 gas outside the coil 215 and turns into hot air. The hot air is finally pressed into the air guide seat 226 through the flow limiting valve 225 and the exhaust pipe 224. After secondary diversion by the air guide seat 226, it is ejected and evenly blows on the surface of the outer shell 1.

[0070] In 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 of the SF6 gas, quickly conduct away the heat emitted by the static contact 203 and the moving contact 204 during operation, improve the heat dissipation efficiency during the operation of the circuit breaker, and ensure the operating stability of the circuit breaker while ensuring the sealing performance;

[0071] The cold air absorbs the heat emitted by the SF6 gas and becomes a hot air flow. After being ejected through the air guide seat 226, the temperature difference between the inside and outside of the outer shell 1 can be reduced, avoiding excessive air humidity in humid weather, which may cause condensation on the surface of the circuit breaker. In addition, the blowing of the hot air flow will further promote the evaporation of moisture on the outside of the outer shell 1, which can greatly enhance the dryness of the outside of the outer shell 1 and equivalently improve the waterproof effect. In the process of air flowing through the air duct 216, the moisture it carries will be absorbed by the absorbent cotton 217, and the heat emitted by the SF6 gas will promote the evaporation of moisture, which can ensure that the hot air flow is always in a dry state, further improving the waterproof performance.

[0072] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or substitute equivalents for some of the technical features. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A waterproof pole-mounted circuit breaker, comprising an outer protective shell (1), characterized in that: A machine box (14) is installed at one end of the outer protective shell (1), and a waste heat dehumidification mechanism (200) is provided inside the outer protective shell (1) and outside the machine box (14); The waste heat dehumidification mechanism (200) comprises a sealed box (201) and a machine box (206); An engine box (206) is installed in the middle of the side end surface of the chassis (14), an impeller (207) and a turbine (208) are rotatably installed inside the engine box (206), and a through hole (209) is opened inside the engine box (206) at a position between the impeller (207) and the turbine (208); A rotating shaft (210) is embedded and rotatably mounted on the side end surface of the machine box (206), and an air connection pipe (211) is mounted on the side end surface of the sealing box (201); A flow guide box (213) is installed outside the machine box (206), and the flow guide box (213) is connected to a gas supply pipe (212) and a return pipe (214); The guide box (213) is internally installed with a coil (215), a plurality of air ducts (216) and absorbent cotton (217); an air cavity (218) is provided at the end of the chassis (14); an I-shaped slot plate (219) and a plug plate (220) are provided inside the air cavity (218); and a rotating plate (221) and a clamping column (222) are installed at the end of the rotating shaft (210).

2. The waterproof pole mounted circuit breaker according to claim 1, characterized in that: A plurality of insulating shielding sleeves (11) are evenly and equidistantly installed on both end surfaces of the outer protective shell (1), a conductive sleeve (12) is embedded in the end of the insulating shielding sleeve (11), and a wiring terminal (13) is installed at one end of the conductive sleeve (12); A sealing box (201) is installed inside the outer protective shell (1), an arc extinguishing tube (202) is installed at a position corresponding to the conductive sleeve (12) inside the sealing box (201), a static contact (203) is installed in the middle of one end of the arc extinguishing tube (202), a moving contact (204) is embedded and slidably installed in the middle of the other end of the arc extinguishing tube (202), and a conduction valve (205) is embedded and installed on the top and bottom of the outer curved surface of the arc extinguishing tube (202); An air intake 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 surface of the air cavity (218), and flow limiting valves (225) are installed at the ends of the air intake pipe (223) and the exhaust pipe (224). An air guide seat (226) is installed on the outside of the outer protective shell (1), and a filter box (227) is installed at the other end of the air duct (216).

3. The waterproof pole mounted circuit breaker according to claim 2, characterized in that: The guide box (213) is vortex-shaped, the cavity inside the machine box (206) at the outer position of the impeller (207) is communicated with the cavity inside the guide box (213) at the outer position of the coil (215) through the air supply pipe (212), the cavity inside the machine box (206) at the outer position of the turbine (208) is communicated with the top of the inner cavity of the sealing box (201) through the air connection pipe (211), and the bottom of the inner cavity of the sealing box (201) is communicated with the cavity inside the guide box (213) at the outer position of the coil (215) through the return pipe (214); The bottom and top of the inner cavity of the sealing box (201) are both connected to the inner cavity of the arc extinguishing tube (202) via a conduction valve (205); the conduction valve (205) is a one-way valve; the bottom and top of the inner cavity of the sealing box (201) are not directly connected; and the inner cavities of the sealing box (201) and the arc extinguishing tube (202) are both filled with SF6 gas.

4. The waterproof pole mounted circuit breaker according to claim 2, characterized in that: The space inside the machine box (206) outside the impeller (207) and the turbine (208) is connected through a through hole (209); the impeller (207) and the turbine (208) are fixedly connected via a rotating shaft (210); and the outer diameter of the rotating shaft (210) is smaller than the inner diameter of the through hole (209).

5. The waterproof pole mounted circuit breaker according to claim 2, characterized in that: The coil (215) and the air duct (216) are both matched with the guide box (213); the wall of the air duct (216) is mesh-shaped; 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); and the flow limiting valve (225) is a one-way valve.

6. The 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 clamping column (222) is matched with the notch on the I-shaped slot plate (219), and the spacing between the plug plates (220) is greater than the diameter of the rotating plate (221).

7. The waterproof pole mounted circuit breaker according to claim 2, characterized in that: A multi-element on-off mechanism (300) is installed outside the arc extinguishing cylinder (202), and the multi-element on-off mechanism (300) includes a temperature locking cylinder (301); A temperature-locking cylinder (301) is installed inside the sealing box (201) at a position outside the arc-extinguishing cylinder (202); an on-off box (302) is installed at one end of the temperature-locking cylinder (301); a linkage box (303) is installed at the other end of the temperature-locking cylinder (301); the side end surfaces of the on-off box (302) and the linkage box (303) are located at a position outside the arc-extinguishing cylinder (202) and are provided with a plurality of air guide holes (304) at equal angles along the circumferential direction; a sliding plate (305) is slidably installed inside the on-off box (302); a conductive seat (306) is embedded in the middle of the side end surface of the sliding plate (305); a power connection rod (307) is installed at one end of the conductive seat (306); and a linkage plate (308) is slidably installed on the outer curved surface of the moving contact (204) at a position inside the linkage box (303); The top edges of the on-off box (302) and the linkage box (303) are both embedded with a pressure gauge (309); the bottom edges of the on-off box (302) and the linkage box (303) are both installed with a connecting pipe (310); the end of the connecting pipe (310) is installed with a gas nozzle (311); a delivery pipe (312) is 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 end of the outer protective shell (1); a screw (314) is embedded and rotatably installed on one end surface of the air box (313); and a movable plate (315) is slidably installed inside the air box (313); An air suction pipe (316) is installed in the middle of the other end face of the air box (313), and a diversion valve (317) is installed at the end of each of the air suction pipe (316) and the delivery pipe (312). A pressure gauge (318) is embedded and installed at a position close to the diversion valve (317) on one end face of the air box (313), and a pressure relief valve (319) is embedded and installed at a position corresponding to the pressure gauge (318) on the other end face of the air box (313). A shifting rod (320) is installed at the end of the screw rod (314).

8. The waterproof pole mounted circuit breaker according to claim 7, characterized in that: The conductive seat (306) is slidably connected to the conductive sleeve (12) via the power plug rod (307); the conductive seat (306) is matched with the static contact (203); the movable contact (204) is matched with the conductive sleeve (12); and the cross-sectional area of the sliding plate (305) is the same as the cross-sectional area of the linkage plate (308).

9. The waterproof pole mounted circuit breaker according to claim 7, characterized in that: The cavities located between the sliding plate (305) and the interlocking plate (308) inside the on-off box (302) and the interlocking box (303) are both connected to the cavity located outside the arc extinguishing cylinder (202) inside the temperature lock cylinder (301) through the air guide hole (304); the cavity located on the other side of the sliding plate (305) inside the on-off box (302) and the cavity located on the other side of the interlocking plate (308) inside the interlocking box (303) are respectively connected to two connecting pipes (310).

10. The waterproof pole mounted circuit breaker according to claim 7, characterized in that: The cavity inside the temperature-locking cylinder (301) and located outside the arc-extinguishing cylinder (202) is communicated with the inner cavity of the air box (313) through the delivery pipe (312) and the diverter valve (317), and the inner cavity of the air box (313) is communicated with the filter box (227) through the diverter valve (317) and the air suction pipe (316). The diverter valve (317) is composed of an air inlet check valve, an air outlet check valve and a two-way valve, and the air outlet check valve and the two-way valve are respectively connected to the two delivery pipes (312), and the air suction pipe (316) is connected to the air inlet check valve.

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