Environment-friendly single-break high-voltage circuit breaker device

Abstract

The application discloses an environment-friendly single-break high-voltage circuit breaker device and relates to the technical field of high-voltage switch equipment.The device comprises a shell, a shielding part is fixedly installed at the top of the shell, a transmission box is fixedly connected to the top surface of the shielding part, the shell is an integrated metal closed structure, a static end assembly is vertically arranged at the bottom of the inner side of the shell, a dynamic end assembly is arranged at the top of the inner side of the shell and at the corresponding position of the static end assembly, the static end assembly and the dynamic end assembly are oppositely arranged to form a single-break arc-extinguishing chamber, a spring operating mechanism is arranged on one side of the transmission box, and the spring operating mechanism is used for completing the opening and closing actions of the shell through the transmission box.The single-break structure design is reasonable, the structure is simpler than that of a traditional double-break circuit breaker, the number of parts is reduced, the device can be directly adapted to the installation of narrow spaces such as a wind power tower, an indoor high-voltage cabinet and an outdoor compact switch station, a large amount of installation space is not needed, and the installation cost and transportation cost are reduced.

Description

Technical Field

[0001] This invention relates to the field of high-voltage switchgear technology, and in particular to an environmentally friendly single-break high-voltage circuit breaker device. Background Technology

[0002] High-voltage circuit breakers are key switching devices in power grid transmission and distribution systems, widely used in substations, transmission lines, and industrial and mining power supply scenarios. Previously, multi-break circuit breakers were commonly used in high-voltage operations, relying on multiple breaks connected in series to switch circuits on and off. Single-break high-voltage circuit breakers are switching devices with a single-break structure, primarily used for switching normal load currents in high-voltage power systems, and for quickly disconnecting faulty circuits when lines or equipment experience short circuits, overloads, or other faults. They undertake the core functions of power grid operation control, fault isolation, and system safety assurance, adapting to various high-voltage transmission scenarios to ensure the stable and orderly operation of the power network.

[0003] With the advancement of global energy transition and the "dual carbon" goal, the power system has put forward core requirements for high-voltage switchgear: environmental protection, compactness, reliability, intelligence, and long service life. High-voltage circuit breakers are the "control and protection heart" of the power grid and new energy power plants. Conventional 126kV circuit breakers mostly adopt a double-break design, which improves the breaking capacity, but the structure is complex, there are many parts, the transmission chain is long, and the size and weight are large, making it difficult to adapt to the narrow spaces such as wind turbine towers and compact GIS. Summary of the Invention

[0004] The purpose of this application is to provide an environmentally friendly single-break high-voltage circuit breaker device, which adopts a single-break structure design. Compared with the traditional double-break circuit breaker, the structure is simpler and the number of parts is reduced. It can be directly adapted to installation in confined spaces such as wind turbine towers, indoor high-voltage cabinets, and outdoor compact switch stations, without occupying a large amount of installation space, thus reducing installation and transportation costs.

[0005] To achieve the above objectives, this application provides the following technical solution: an environmentally friendly single-break high-voltage circuit breaker device, including a housing, a shielding component fixedly installed at the top of the housing, a transmission box fixedly connected to the top surface of the shielding component, the housing being an integrated metal enclosed structure, a stationary end assembly vertically arranged at the bottom of the inner side of the housing, a moving end assembly arranged at the corresponding position of the stationary end assembly at the top of the inner side of the housing, the stationary end assembly and the moving end assembly facing each other to form a single-break arc-extinguishing chamber, a spring operating mechanism arranged on one side of the transmission box, the spring operating mechanism completing the opening and closing action of the housing through the transmission box.

[0006] Preferably, the transmission box includes a first insert rod disposed at the top position of the moving end assembly, the top end of the first insert rod being rotatably connected to a first hinge joint, the first hinge joint being fixedly connected to a driven rod, the driven rod being rotatably connected to a shaft seat, and the top position of the shaft seat being fixedly connected to the inner wall of the transmission box.

[0007] Preferably, one end of the driven rod is fixedly connected to a first transmission seat, a linkage plate is rotatably connected to the first transmission seat, the other end of the linkage plate is rotatably connected to a second transmission seat, the second transmission seat is fixedly connected to the linkage rod, and both ends of the linkage rod are rotatably connected to the inner wall of the transmission box.

[0008] Preferably, a pair of second hinge joints are fixedly connected to the linkage rod, and a second insert rod is rotatably connected to the bottom end of the second hinge joint. One end of the linkage rod extends to the outside of the transmission box, and a mating joint is fixedly connected to one end of the linkage rod. A push plate is rotatably connected to the mating joint.

[0009] Preferably, the spring operating mechanism includes a mounting plate fixedly connected to one side of the transmission box, a rotating rod rotatably connected to the mounting plate, a bridge plate fixedly connected to one end of the rotating rod, a push plate rotatably connected to one end of the bridge plate, and a first telescopic rod rotatably connected to the other end of the bridge plate. The first telescopic rod extends into the interior of the first energy storage tube, and the first energy storage tube is fixedly mounted on the mounting plate.

[0010] Preferably, a drive rod is rotatably connected inside the mounting plate, a cam is fixedly connected to the drive rod, a roller is attached to the edge of the cam, the roller is rotatably connected to the arm plate, the arm plate is fixedly connected to the rotating rod, a triangular buckle is fixedly connected to the arm plate, a locking plate is attached to the triangular buckle, the locking plate is rotatably connected to the mounting plate, a contact is locked at the top of the locking plate, a first micro switch is installed at the top of the mounting plate, and the telescopic end of the first micro switch is attached to the contact.

[0011] Preferably, a second energy storage tube is fixedly installed on the mounting plate, and a second telescopic rod is inserted inside the second energy storage tube. One end of the second telescopic rod is rotatably connected to a turntable, and the turntable is fixedly connected to one end of a drive rod. A locking pin is fixedly connected to the turntable, and a locking block is locked on the locking pin. The locking block is rotatably connected to the inside of the mounting plate.

[0012] Preferably, a pulley is rotatably connected to the block, a rocker plate is attached to the pulley, the rocker plate is rotatably connected to the inside of the mounting plate, a second micro switch is installed at the top of the mounting plate, a push head is fixedly connected to the telescopic end of the second micro switch, and the bottom of the push head is locked onto the rocker plate.

[0013] In summary, the present invention has the following beneficial effects: 1. The present invention has a reasonable structure and adopts a single-break structure design. Compared with the traditional double-break circuit breaker, the structure is simpler, the number of parts is reduced by more than 30%, the volume is reduced by more than 25%, and the weight is reduced by more than 15%. It can be directly adapted to installation in narrow spaces such as wind turbine towers, indoor high-voltage cabinets, and outdoor compact switch stations, without occupying a large amount of installation space, thus reducing installation and transportation costs.

[0014] 2. In this invention, by optimizing the conductive circuit design, using special conductive grease, improving sealing performance, and setting an electric field shield at the top inner side of the housing, the transmission system can be optimized. The mechanical life of the equipment is ≥10,000 cycles, the electrical life is ≥30 short-circuit breaks, and the maintenance-free period is ≥5 years. This can effectively reduce the equipment failure rate and maintenance costs, improve the reliability and stability of equipment operation, and reduce downtime losses. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the three-dimensional structure of the shell; Figure 2 This is a schematic diagram of the three-dimensional cross-sectional structure of the shell; Figure 3 This is a three-dimensional cross-sectional view of the transmission box. Figure 4 This is a schematic diagram of the internal structure of the transmission box; Figure 5 This is a schematic diagram of the three-dimensional structure of the mounting plate; Figure 6 This is a schematic diagram of the three-dimensional structure of the rotating rod; Figure 7 This is a schematic diagram of the three-dimensional structure of the turntable.

[0017] In the diagram: 1. Housing; 101. Stationary end assembly; 102. Moving end assembly; 103. Shielding component; 104. Transmission box; 105. Spring operating mechanism; 2. First insert rod; 201. First hinge joint; 202. Driven rod; 203. Shaft seat; 204. First transmission seat; 205. Linkage plate; 206. Second transmission seat; 207. Linkage rod; 208. Second hinge joint; 209. Second insert rod; 210. Connecting joint; 211. Push plate; 3. Mounting plate; 301 302. Turning rod; 303. Bridge plate; 304. First telescopic rod; 305. First energy storage tube; 306. Drive rod; 307. Cam; 308. Roller; 309. Arm plate; 310. Triangular buckle; 310. Locking plate; 311. Contact; 312. First micro switch; 4. Second energy storage tube; 401. Second telescopic rod; 402. Turntable; 403. Locking post; 404. Locking block; 405. Pulley; 406. Rocker; 407. Second micro switch; 408. Push head. Detailed Implementation

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

[0019] Example: Reference Figures 1-7 The environmentally friendly single-break high-voltage circuit breaker device shown includes a housing 1. A shield 103 is fixedly installed at the top of the housing 1. A transmission box 104 is fixedly connected to the top surface of the shield 103. The housing 1 is an integrated metal enclosed structure. A stationary end assembly 101 is vertically arranged at the bottom of the inner side of the housing 1. A moving end assembly 102 is arranged at the top of the inner side of the housing 1 at the corresponding position of the stationary end assembly 101. The stationary end assembly 101 and the moving end assembly 102 are opposite each other to form a single-break arc-extinguishing chamber. A spring operating mechanism 105 is arranged on one side of the transmission box 104. The spring operating mechanism 105 completes the opening and closing actions of the housing 1 through the transmission box 104.

[0020] Specifically, housing 1, model 5NK.G16.002.023, adopts an integrated enclosed structure, providing an installation carrier and sealed cavity for the equipment. It is made of welded aluminum alloy, with electrostatic spraying for anti-corrosion treatment. The anti-corrosion layer is 80μm thick, which can effectively resist the corrosion of harsh environments. The housing size is designed to be compatible with a 126kV voltage level, with an overall height ≤1200mm, width ≤800mm, and depth ≤600mm. The compact structure is suitable for installation in confined spaces.

[0021] The stationary end assembly 101, model number 5NK.G16.550.011, is fixedly installed at one end of the inner cavity of the housing 1 to fix the stationary contact and form the fixed end of the single-break arc-extinguishing chamber. The stationary end assembly 101 is made of a combination of high-strength insulating and conductive materials, which has good insulation and conductivity performance, can withstand rated voltage and rated current, and avoids insulation breakdown and excessive temperature rise.

[0022] The moving end assembly 102, model 5NK.G16.550.012, is installed at the other end of the housing cavity and is opposite to the stationary end assembly 101 to form a single-break arc-extinguishing chamber. The moving end assembly 102 can move linearly under the drive of the transmission box 104 to realize the opening and closing action of the moving contact. The moving end assembly 102 is equipped with an arc-extinguishing channel and an arc-blowing structure, which can quickly extinguish the arc when opening and ensure the reliability of the interruption.

[0023] Fill the housing 1 with dry, clean air at a pressure of 0.45 MPa (the midpoint of the rated pressure). After filling, let it stand for 24 hours. Use the soap solution leak detection method to check for leaks at the sealing surface and interface. If no bubbles are observed, the seal is confirmed to be qualified. At the same time, install a density relay and set the pressure alarm value to a lower limit of 0.42 MPa and an upper limit of 0.50 MPa to ensure stable air chamber pressure.

[0024] In one embodiment of this invention, the transmission box 104 includes a first insert rod 2 positioned at the top of the moving end assembly 102. The top end of the first insert rod 2 is rotatably connected to a first hinge joint 201, which is fixedly connected to a driven rod 202. The driven rod 202 is rotatably connected to a shaft seat 203, the top of which is fixedly connected to the inner wall of the transmission box 104. One end of the driven rod 202 is fixedly connected to a first transmission seat 204, and a linkage plate 205 is rotatably connected to the first transmission seat 204. The other end of plate 205 is rotatably connected to the second transmission seat 206. The second transmission seat 206 is fixedly connected to the linkage rod 207. Both ends of the linkage rod 207 are rotatably connected to the inner wall of the transmission box 104. A pair of second hinge joints 208 are fixedly connected to the linkage rod 207. The bottom end of the second hinge joint 208 is rotatably connected to the second insertion rod 209. One end of the linkage rod 207 extends to the outside of the transmission box 104. One end of the linkage rod 207 is fixedly connected to the coupling joint 210. A push plate 211 is rotatably connected to the coupling joint 210.

[0025] Specifically, the push plate 211 pushes the connector 210 to rotate, thereby facilitating the rotation of the linkage rod 207. A second transmission seat 206 is fixedly connected to the linkage rod 207, and a linkage plate 205 is rotatably connected to the second transmission seat 206. The other end of the linkage plate 205 is rotatably connected to the first transmission seat 204. The first transmission seat 204 is fixedly connected to the driven rod 202. The rotation of the linkage rod 207 drives the driven rod 202 to rotate through the linkage plate 205 on the second transmission seat 206, thereby facilitating the pushing of the second insertion rod 209 and the top of the first insertion rod 2's opposing end assembly 102.

[0026] In one embodiment of this invention, the spring operating mechanism 105 includes a mounting plate 3 fixedly connected to one side of the transmission box 104. A rotating rod 301 is rotatably connected to the mounting plate 3. One end of the rotating rod 301 is fixedly connected to a bridge plate 302. One end of the bridge plate 302 is rotatably connected to a push plate 211. The other end of the bridge plate 302 is rotatably connected to a first telescopic rod 303. The first telescopic rod 303 extends into the interior of a first energy storage tube 304. The first energy storage tube 304 is fixedly mounted on the mounting plate 3. A drive rod 305 is rotatably connected inside the mounting plate 3. A cam 306 is fixedly connected to the drive rod 305. A roller 307 is attached to the edge of the cam 306. The roller 307 is rotatably connected to an arm plate 308. The arm plate 308 is fixedly connected to the rotating rod 301. A triangular buckle 309 is fixedly connected to the arm plate 308. A locking plate 310 is attached to the triangular buckle 309. The locking plate 310 is rotatably connected to the mounting plate 3. A contact 311 is fitted onto the top of the mounting plate 310. A first micro switch 312 is mounted on the top of the mounting plate 3. The telescopic end of the first micro switch 312 is attached to the contact 311. A second energy storage tube 4 is fixedly mounted on the mounting plate 3. A second telescopic rod 401 is inserted inside the second energy storage tube 4. One end of the second telescopic rod 401 is rotatably connected to a turntable 402. The turntable 402 is fixedly connected to one end of a drive rod 305. A [missing information - likely a component or component] is fixedly connected to the turntable 402. A locking post 403 is provided, and a locking block 404 is fixed on the locking post 403. The locking block 404 is rotatably connected to the inside of the mounting plate 3. A pulley 405 is rotatably connected to the locking block 404. A rocker plate 406 is attached to the pulley 405. The rocker plate 406 is rotatably connected to the inside of the mounting plate 3. A second micro switch 407 is installed at the top of the mounting plate 3. A push head 408 is fixedly connected to the telescopic end of the second micro switch 407. The bottom of the push head 408 is locked on the rocker plate 406.

[0027] Specifically, the motor rotates the drive rod 305, which in turn rotates the turntable 402. This allows the second telescopic rod 401 to push the second energy storage tube 4. Then, the second micro switch 407 pushes the rocker plate 406 through the push head 408, which in turn rotates the locking block 404. The rotation of the locking block 404 allows it to lock onto the locking post 403 on the turntable 402, thus completing the closing operation.

[0028] Working principle of the invention: The spring operating mechanism 105 stores energy. After the energy storage is completed, it receives a closing command, the opening and closing coils are energized, the spring operating mechanism 105 releases energy, and the energy is transmitted to the linkage rod 207 through the transmission box 104. The linkage rod 207 drives the moving end assembly 102 to move linearly towards the stationary end assembly 101. When the moving contact on the moving end assembly 102 makes reliable contact with the stationary contact on the stationary end assembly 101, the closing action is completed, the power circuit is connected, and the equipment enters normal operation.

[0029] When a short circuit or overload occurs in the power circuit, the equipment receives a tripping command, the tripping coil is energized, and the driving spring operating mechanism 105 releases energy. The energy is transmitted to the moving end assembly 102 through the transmission box 104 and the linkage rod 207. The moving end assembly 102 moves rapidly away from the stationary end assembly 101, and the moving contact on the moving end assembly 102 separates from the stationary contact on the stationary end assembly 101, generating an electric arc. At this time, the environmentally friendly insulating gas in the gas chamber forms a high-speed airflow to blow the arc under the action of the arc blowing structure, which quickly extinguishes the arc. After the arc is extinguished, the moving end assembly continues to move to the tripping limit position, the tripping action is completed, the power circuit is disconnected, and fault protection is achieved.

[0030] Finally, it should be noted that the above 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. An environmentally friendly single-break high-voltage circuit breaker device, characterized in that, include: The housing (1) has a shield (103) fixedly installed at the top position of the housing (1), and a transmission box (104) is fixedly connected to the top surface of the shield (103). The housing (1) is an integrated metal closed structure. A stationary end assembly (101) is set vertically at the bottom of the inner side of the housing (1). A moving end assembly (102) is set at the corresponding position of the stationary end assembly (101) at the top of the inner side of the housing (1). The stationary end assembly (101) and the moving end assembly (102) are opposed to form a single-break arc-extinguishing chamber. A spring operating mechanism (105) is set on one side of the transmission box (104). The spring operating mechanism (105) completes the opening and closing action of the housing (1) through the transmission box (104).

2. An environmentally friendly single-break high-voltage circuit breaker device according to claim 1, characterized in that: The transmission box (104) includes a first insert rod (2) located at the top of the moving end assembly (102). The top end of the first insert rod (2) is rotatably connected to a first hinge joint (201). The first hinge joint (201) is fixedly connected to a driven rod (202). The driven rod (202) is rotatably connected to a bearing seat (203). The top of the bearing seat (203) is fixedly connected to the inner wall of the transmission box (104).

3. An environmentally friendly single-break high-voltage circuit breaker device according to claim 2, characterized in that: One end of the driven rod (202) is fixedly connected to a first transmission seat (204), and a linkage plate (205) is rotatably connected to the first transmission seat (204). The other end of the linkage plate (205) is rotatably connected to a second transmission seat (206), and the second transmission seat (206) is fixedly connected to a linkage rod (207). Both ends of the linkage rod (207) are rotatably connected to the inner wall of the transmission box (104).

4. An environmentally friendly single-break high-voltage circuit breaker device according to claim 3, characterized in that: A pair of second hinge joints (208) are fixedly connected to the linkage rod (207). The bottom end of the second hinge joint (208) is rotatably connected to the second insert rod (209). One end of the linkage rod (207) extends to the outside of the transmission box (104). One end of the linkage rod (207) is fixedly connected to the coupling joint (210). A push plate (211) is rotatably connected to the coupling joint (210).

5. An environmentally friendly single-break high-voltage circuit breaker device according to claim 4, characterized in that: The spring operating mechanism (105) includes a mounting plate (3) fixedly connected to one side of the transmission box (104). A rotating rod (301) is rotatably connected to the mounting plate (3). A bridge plate (302) is fixedly connected to one end of the rotating rod (301). One end of the bridge plate (302) is rotatably connected to the push plate (211). A first telescopic rod (303) is rotatably connected to the other end of the bridge plate (302). The first telescopic rod (303) extends into the interior of the first energy storage tube (304). The first energy storage tube (304) is fixedly installed on the mounting plate (3).

6. An environmentally friendly single-break high-voltage circuit breaker device according to claim 5, characterized in that: The mounting plate (3) is internally connected to a drive rod (305), and a cam (306) is fixedly connected to the drive rod (305). A roller (307) is attached to the edge of the cam (306). The roller (307) is rotatably connected to the arm plate (308). The arm plate (308) is fixedly connected to the rotating rod (301). A triangular buckle (309) is fixedly connected to the arm plate (308). A clip plate (310) is attached to the triangular buckle (309). The clip plate (310) is rotatably connected to the mounting plate (3). A contact (311) is clipped at the top of the clip plate (310). A first micro switch (312) is installed at the top of the mounting plate (3). The telescopic end of the first micro switch (312) is attached to the contact (311).

7. An environmentally friendly single-break high-voltage circuit breaker device according to claim 6, characterized in that: A second energy storage tube (4) is fixedly installed on the mounting plate (3). A second telescopic rod (401) is inserted inside the second energy storage tube (4). One end of the second telescopic rod (401) is rotatably connected to the turntable (402). The turntable (402) is fixedly connected to one end of the drive rod (305). A locking post (403) is fixedly connected to the turntable (402). A locking block (404) is locked on the locking post (403). The locking block (404) is rotatably connected inside the mounting plate (3).

8. An environmentally friendly single-break high-voltage circuit breaker device according to claim 7, characterized in that: A pulley (405) is rotatably connected to the locking block (404), and a rocker (406) is attached to the pulley (405). The rocker (406) is rotatably connected to the inside of the mounting plate (3). A second micro switch (407) is installed at the top of the mounting plate (3). A pusher (408) is fixedly connected to the telescopic end of the second micro switch (407), and the bottom of the pusher (408) is locked on the rocker (406).

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