Integrated sealed primary and secondary fused pole-mounted circuit breaker

Abstract

This utility model relates to an integrated sealed primary and secondary fusion pole-mounted circuit breaker, including an external structure, a circuit system, and a circuit breaking system. The uppermost layer of the external structure is provided with a high-voltage output terminal, and the second layer of the external structure is provided with a high-voltage input terminal. A relay starts the hydraulic rod, causing the rack at the front end of the hydraulic rod to move linearly. Through the clearance fit between the connecting rod groove and the control rod, the movement of the grooved connecting rod, the driven rod, and the sliding telescopic rod is controlled. The final result is that the sliding telescopic rod interlocks vertically, and the circuit breaking rod moves downward, causing the original clearance fit connection between the hollow copper column and the solid copper column to be broken and separated, thus breaking the circuit.

Description

Technical Field

[0001] This utility model relates to a circuit breaker, specifically an integrated sealed primary and secondary fusion pole-mounted circuit breaker. Background Technology

[0002] A circuit breaker is a switching device capable of closing, carrying, and interrupting current under normal circuit conditions, and capable of closing, carrying, and interrupting current under abnormal circuit conditions within a specified time. It is widely used in substations and industrial and mining power distribution systems for control and protection. Pole-mounted circuit breakers are a type of circuit breaker and are typically installed on utility poles.

[0003] Chinese patent discloses a primary and secondary integrated pole-mounted circuit breaker (authorization announcement number CN 213340254 U). This patented technology can solve the problems in the prior art where workers need to climb to a high position to maintain and repair the circuit breaker body, which is very unsafe, and where water accumulation on the mounting plate causes rust on the bottom of the circuit breaker body or water intrusion into the equipment box. However, it fails to solve the safety factors of the circuit breaker in its working principle. Therefore, those skilled in the art provide an integrated sealed primary and secondary integrated pole-mounted circuit breaker to solve the problems mentioned in the background art. Utility Model Content

[0004] The purpose of this invention is to provide an integrated sealed primary and secondary fusion pole-mounted circuit breaker to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] An integrated sealed primary and secondary fusion pole-mounted circuit breaker includes an external structure, a circuit system, and a circuit breaking system. The uppermost layer of the external structure has a high-voltage output terminal, and the second layer of the external structure has a high-voltage input terminal. The circuit breaking system includes a relay connected to an external voltage transformer or current transformer. The relay is connected to a hydraulic rod, and the end of the hydraulic rod away from the relay has a rack that meshes with a gear. The gear is rotatably connected to a rotating shaft, which is fixedly connected to the external structure. The gear has a limiting groove that is clearance-fitted with a limiting rod, which is fixedly connected to the external structure. Above the gear is a control rod, which is clearance-fitted with a grooved connecting rod. One end of the grooved connecting rod is rotatably connected to a driven rod, and the other end is rotatably connected to a shaft. The shaft is fixedly connected to the external structure. The driven rod is rotatably connected to a sliding telescopic rod. When the circuit breaker relay receives an overload signal from the voltage transformer or current transformer and needs to disconnect the circuit, the relay activates the hydraulic rod, causing the rack at the front end of the hydraulic rod to move linearly. The gear then moves counterclockwise. Through the clearance between the connecting rod slot and the control rod, the movement of the slotted connecting rod, the driven rod, and the sliding telescopic rod is controlled. The final result is that the sliding telescopic rod engages with each other in the vertical direction.

[0007] Preferably: the bottom of the high-voltage inlet terminal is fixedly connected to a conductive metal plate; the top of the conductive metal plate is fixedly connected to the structural plate two and the bottom of the hollow copper column, which are connected to the high-voltage outlet terminal; the central axis of the hollow copper column coincides with that of the solid copper column, and the diameter of the solid copper column is slightly smaller than that of the hollow copper column; the upper end of the structural plate two and the lower end of the structural plate two are clearance-fitted; the outer side of the structural plate one is fixedly connected to the external protective structure; the bottom of the external protective structure is fixedly connected to a fixing plate; the fixing plate is fixedly connected to the external structure; the cavity between the structural plate one and the structural plate two and the hollow and solid copper columns is a gas cavity; a heating ring is provided in the gas cavity and it is filled with sulfur hexafluoride gas; a sealing valve is provided at the top of the gas cavity; and the sealing valve is interference-fitted with the solid copper column.

[0008] Preferably, the bottom of the conductive metal plate is fixedly connected to the insulating plate, the bottom of the insulating plate is fixedly connected to the circuit breaker rod, and the circuit breaker rod is fixedly connected to the top of the sliding telescopic rod of the circuit breaker system. The circuit breaker system includes a relay. When the sliding telescopic rod shortens, it pulls the circuit breaker rod downward. The downward movement of the circuit breaker rod causes the original gap fit connection between the hollow copper column and the solid copper column to be destroyed and separated from each other, causing the circuit to be disconnected. The powerful electric arc generated by the disconnection can also pose a danger. Therefore, sulfur hexafluoride gas is filled into the gas chamber. This gas can effectively reduce the damage of the electric arc to the equipment. In order to keep the sulfur hexafluoride in a gaseous state, the temperature of the gas chamber needs to be increased. Therefore, a heating ring is added to control the temperature in the gas chamber.

[0009] Compared with the prior art, the beneficial effects of this utility model are:

[0010] 1. Compared with existing products, this utility model eliminates components that are prone to damage, such as springs and locking blocks. The circuit breaking system uses almost a pure mechanical structure, which almost eliminates safety problems caused by the structure itself.

[0011] 2. The circuit breaking and circuit opening operations of this utility model are also simplified, and the circuit can be broken and restored without the need for multiple relays. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of an integrated sealed primary and secondary combined pole-mounted circuit breaker.

[0013] Figure 2 This is a schematic diagram of the internal structure of an integrated sealed primary and secondary fusion pole-mounted circuit breaker.

[0014] Figure 3 This is a schematic diagram of an integrated sealed primary and secondary fusion pole-mounted circuit breaker interruption system.

[0015] Figure 4 This is a schematic diagram of the circuit system in an integrated sealed primary and secondary combined pole-mounted circuit breaker.

[0016] Figure 5 This is a schematic diagram of the terminal block structure in an integrated sealed primary and secondary fusion pole-mounted circuit breaker.

[0017] In the diagram: 1. External structure; 2. Circuit system; 211. High-voltage inlet terminal; 212. High-voltage outlet terminal; 213. Circuit breaker rod; 214. Insulating plate; 215. Conductive metal plate; 216. Fixing plate; 217. Hollow copper column; 218. Solid copper column; 219. Heating ring; 220. Structural plate one; 221. External protection structure; 222. Air chamber; 223. Sealing valve; 224. Structural plate two; 3. Circuit breaker system; 311. Relay; 312. Hydraulic rod; 313. Rack; 314. Gear; 315. Rotating shaft; 316. Limiting groove; 317. Limiting rod; 318. Control rod; 319. Grooved connecting rod; 320. Connecting rod groove; 321. Driven rod; 322. Sliding telescopic rod. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-5 In this embodiment of the utility model, an integrated sealed primary and secondary fusion pole-mounted circuit breaker includes an external structure 1, a circuit system 2, and a circuit breaking system 3. The uppermost layer of the external structure 1 has a high-voltage output terminal 212, and the second layer of the external structure 1 has a high-voltage input terminal 211. The bottom of the high-voltage input terminal 211 is fixedly connected to a conductive metal plate 215. The upper part of the conductive metal plate 215 is fixedly connected to a structural plate 224 of the high-voltage output terminal 212 and the bottom end of a hollow copper column 217. The central axis of the hollow copper column 217 coincides with that of the solid copper column 218, and the diameter of the solid copper column 218 is slightly smaller. Regarding the diameter of the hollow copper column 217, the upper end of the second structural plate 224 and the lower end of the first structural plate 220 are clearance-fitted. The outer side of the first structural plate 220 is fixedly connected to the external protective structure 221. The bottom of the external protective structure 221 is fixedly connected to the fixing plate 216. The fixing plate 216 is fixedly connected to the external structure 1. The cavity between the first structural plate 220 and the second structural plate 224, the hollow copper column 217, and the solid copper column 218 is a gas cavity 222. The gas cavity 222 is equipped with a heating ring 219 and filled with sulfur hexafluoride gas. The top of the gas cavity 222 is equipped with a sealing valve 223, which is interference-fitted with the solid copper column 218.

[0020] The bottom of the conductive metal plate 215 is fixedly connected to the insulating plate 214, and the bottom of the insulating plate 214 is fixedly connected to the circuit breaker rod 213. The circuit breaker rod 213 is fixedly connected to the top of the sliding telescopic rod 322 of the circuit breaker system 3. The circuit breaker system 3 includes a relay 311, which is connected to an external voltage transformer or current transformer. The relay 311 is connected to a hydraulic rod 312, and a rack 313 is provided at the end of the hydraulic rod 312 away from the relay 311. The rack 313 meshes with a gear 314, and the gear 314 is rotatably connected to the rotating shaft 315. The rotating shaft 315 is fixedly connected to the external structure 1. The gear 314 is provided with a limiting groove 316. The limiting groove 316 is clearance-fitted with the limiting rod 317. The limiting rod 317 is fixedly connected to the external structure 1. A control rod 318 is provided above the gear 314. The control rod 318 is clearance-fitted with a connecting rod groove 320 on a grooved connecting rod 319. One end of the grooved connecting rod 319 is rotatably connected to the driven rod 321, and the other end is rotatably connected to the shaft. The shaft is fixedly connected to the external structure 1. The driven rod 321 is rotatably connected to the sliding telescopic rod 322.

[0021] The working principle of this utility model is as follows: When the relay 311 of the circuit breaker receives an overload signal from the voltage transformer or current transformer and needs to disconnect the circuit, the relay 311 activates the hydraulic rod 312, causing the rack 313 at the front end of the hydraulic rod 312 to move linearly, and the gear 314 to move counterclockwise accordingly. Through the clearance between the connecting rod groove 320 and the control rod 318, the grooved connecting rod 319, the driven rod 321, and the sliding telescopic rod 322 are controlled to move. The final result is that the sliding telescopic rod 322 engages vertically, i.e., slides. The telescopic rod 322 shortens and pulls the circuit breaker rod 213 downward. The downward movement of the circuit breaker rod 213 causes the original gap fit connection between the hollow copper column 217 and the solid copper column 218 to be broken and separated, resulting in the circuit being disconnected. The powerful electric arc generated by the disconnection also poses a danger. Therefore, sulfur hexafluoride gas is filled into the gas chamber 222. This gas can effectively reduce the damage of the electric arc to the equipment. In order to keep the sulfur hexafluoride in a gaseous state, the temperature of the gas chamber 222 needs to be increased. Therefore, a heating ring 219 is added to control the temperature in the gas chamber 222.

[0022] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An integrated sealed primary and secondary fusion pole-mounted circuit breaker, comprising an external structure (1), a circuit system (2), and a circuit breaking system (3), characterized in that, The uppermost layer of the external structure (1) is provided with a high-voltage output terminal (212), and the uppermost layer of the external structure (1) is provided with a high-voltage input terminal (211). The bottom of the high-voltage input terminal (211) is fixedly connected to a conductive metal plate (215). The upper part of the conductive metal plate (215) is fixedly connected to the structural plate two (224) of the high-voltage output terminal (212) and the bottom of the hollow copper column (217). The central axis of the hollow copper column (217) coincides with that of the solid copper column (218), and the diameter of the solid copper column (218) is smaller than that of the hollow copper column (217). The upper end of the structural plate two (224) and the lower end of the structural plate one (220) are fitted with a clearance.

2. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 1, characterized in that, The outer side of the first structural plate (220) is fixedly connected to the outer protective structure (221), the bottom of the outer protective structure (221) is fixedly connected to the fixing plate (216), the fixing plate (216) is fixedly connected to the outer structure (1), and the cavity between the first structural plate (220) and the second structural plate (224) and the hollow copper column (217) and the solid copper column (218) is an air cavity (222).

3. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 2, characterized in that, The gas chamber (222) is equipped with a heating ring (219) and filled with sulfur hexafluoride gas. The top of the gas chamber (222) is equipped with a sealing valve (223), which is interference-fitted with a solid copper column (218).

4. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 1, characterized in that, The bottom of the conductive metal plate (215) is fixedly connected to the insulating plate (214), the bottom of the insulating plate (214) is fixedly connected to the circuit breaker rod (213), and the top of the circuit breaker rod (213) is fixedly connected to the sliding telescopic rod (322) of the circuit breaker system (3).

5. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 4, characterized in that, The circuit breaking system (3) includes a relay (311), which is connected to an external voltage transformer or current transformer. The relay (311) is connected to a hydraulic rod (312). A rack (313) is provided at the end of the hydraulic rod (312) away from the relay (311). The rack (313) meshes with a gear (314). The gear (314) is rotatably connected to a rotating shaft (315). The rotating shaft (315) is fixedly connected to an external structure (1).

6. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 5, characterized in that, The gear (314) is provided with a limiting groove (316), the limiting groove (316) is clearance-fitted with the limiting rod (317), the limiting rod (317) is fixedly connected to the external structure (1), a control rod (318) is provided above the gear (314), and the control rod (318) is clearance-fitted with the grooved connecting rod (319) which is provided with a connecting rod groove (320).

7. The integrated sealed primary and secondary fusion pole-mounted circuit breaker according to claim 6, characterized in that, One end of the grooved connecting rod (319) is rotatably connected to the driven rod (321), and the other end is rotatably connected to the shaft. The shaft is fixedly connected to the external structure (1), and the driven rod (321) is rotatably connected to the sliding telescopic rod (322).

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