A transmission type circuit breaker

Abstract

The invention discloses a transmission type circuit breaker, which relates to the technical field of circuit breakers, comprising a transmission box, a plurality of shielding boxes are evenly and equidistantly installed on the top of the transmission box, an isolation box is installed in the middle of the side end surface of the shielding box, an insulating shell is installed inside the shielding box, a shielding cylinder is installed inside the insulating shell, an upper guide rod is installed on the top of the shielding cylinder, a lower guide rod is embedded and slidably installed on the bottom end of the shielding cylinder, and a cylinder is symmetrically embedded and installed on the edge of the top of the transmission box. The invention can improve the reaction sensitivity of the circuit breaker, make the circuit breaking operation more timely and effective, integrate the on-off function of the isolating switch and the on-off function of the circuit breaker, greatly improve the compatibility and adaptability of the on-off function of the isolating switch and the on-off function of the circuit breaker, make full use of the heat energy dissipated during the operation of the circuit breaker, make the circuit breaking action more matched with the working state of the circuit breaker, construct a double on-off structure, and enhance the effectiveness and reliability of the on-off work of the circuit breaker.

Description

Technical Field

[0001] The present invention relates to the technical field of circuit breakers, in particular to a transmission type circuit breaker. Background Art

[0002] A circuit breaker refers to a switching device that can close, carry and disconnect current under normal circuit conditions and can close, carry and disconnect current under abnormal circuit conditions within a specified time. Circuit breakers can be used to distribute electrical energy, start asynchronous motors infrequently, and protect power lines and motors. When they have serious overloads or short circuits and undervoltage faults, they can automatically cut off the circuit. The Chinese Patent Network discloses a vacuum circuit breaker with an application number of 202310212700.6. The circuit breaker can effectively ensure that the three phases of the circuit breaker are driven simultaneously during operation, thereby improving the synchronization of the operation. In order to ensure the circuit-breaking reliability of the circuit breaker, it usually needs to be used in conjunction with an isolating switch;

[0003] However, the circuit breakers currently on the market have poor compatibility and stability with disconnectors during operation, and need to be operated separately. This is not only prone to safety accidents due to errors in the operating sequence, but also prone to invalid circuit breaking due to asynchronous operation and unresponsive circuit breakers during the circuit breaking process, which can easily cause circuit breaker damage and accidents. In addition, it requires additional wiring to provide a power source, which is not only unable to effectively adapt to power changes during the operation of the circuit breaker, but the circuit breaking operation is also susceptible to electromagnetic interference, resulting in unstable and inflexible circuit breaking work and a high failure rate. Summary of the invention

[0004] The present invention provides a transmission type circuit breaker, which can effectively solve the problem mentioned in the above background technology that the circuit breakers currently on the market have poor compatibility and stability with disconnectors during operation, and need to be operated separately, which is not only easy to cause safety accidents due to errors in the operation sequence, but also easy to cause invalid circuit breaking during the circuit breaking process due to asynchronous operation and insensitive response of the circuit breaker, which is easy to cause circuit breaker damage and accidents. In addition, it requires additional wiring to provide a power source, which is not only unable to effectively adapt to power changes during the operation of the circuit breaker, but the circuit breaking operation is also easily affected by electromagnetic interference, resulting in unstable and inflexible circuit breaking work and excessively high failure rate.

[0005] To achieve the above object, the present invention provides the following technical solutions: a transmission type circuit breaker, comprising a transmission box, a plurality of shielding boxes are evenly and equidistantly installed at the top of the transmission box, an isolation box is installed in the middle of the side end surface of the shielding box, a current transformer is installed at the side end surface of the shielding box at the bottom of the isolation box, and a double linkage mechanism is installed inside the transmission box;

[0006] The double linkage mechanism includes an insulating shell;

[0007] An insulating shell is installed inside the shielding box, a shielding cylinder is installed inside the insulating shell, an upper guide rod is installed on the top of the shielding cylinder, and a lower guide rod is embedded and slidably installed on the bottom of the shielding cylinder;

[0008] The top edge of the transmission box is symmetrically embedded with a cylinder, the middle of the bottom of the cylinder is embedded with a push-pull rod for sliding installation, and the top of the push-pull rod is installed with a round plug at a position inside the cylinder;

[0009] A conductive tube is embedded and installed at the bottom of the outer curved surface of the insulating shell, and the bottom of one of the cylinder inner cavities is connected to the end of the conductive tube;

[0010] A conductive head is embedded and installed at the position of the current transformer corresponding to the side end surface of the shielding box, and the conductive head is slidably connected to the lower guide rod;

[0011] A lifting plate is slidably installed inside the isolation box, an electric socket is embedded and installed on one side of the top of the lifting plate, an electric plug is installed at the position of the electric socket at the bottom of the isolation box corresponding to the electric socket, and soft wires are installed at the ends of the electric plug and the electric socket.

[0012] According to the above technical solution, the upper guide rod and the lower guide rod are both conductive rods, an upper terminal is installed on the top of the upper guide rod, a side terminal is embedded in the top of the side end surface of the isolation box, and the side terminal is connected to the electrical socket through a soft wire, and the electrical plug is connected to the conductive head through a soft wire.

[0013] According to the above technical solution, a rotating shaft is rotatably installed on one side of the side end surface of the transmission box, a linkage frame is installed at the outer side of the rotating shaft at a position inside the transmission box, a strip plate is slidably installed at the bottom end of the lower guide rod at a position on the top of the linkage frame, a connecting plate is rotatably installed at the side end surface of the strip plate near the rotating shaft, and the connecting plate is rotatably connected to the end of the linkage frame, a clamp is installed at the bottom end of one of the push-pull rods corresponding to the other end of the linkage frame, the end of the other push-pull rod is connected to the strip plate, and contacts are installed at the ends of the upper guide rod and the lower guide rod;

[0014] A limit box is installed on the top of the lifting plate, a piston is slidably installed inside the limit box, a support tube is installed at the bottom of the lifting plate, a block is slidably installed inside the support tube, a support rod is embedded and installed on the other side of the top of the lifting plate, and both ends of the support rod are respectively connected to the piston and the block, and a connecting pipe is installed in the middle of the bottom end of the support tube.

[0015] According to the above technical solution, the insulating shell is made of heat-insulating ceramic material, the shielding tube is made of heat-conducting ceramic material, the strip is made of insulating material, the cylinder is composed of an on-off cylinder and a pressure-regulating cylinder, the clamp is located at the bottom of the on-off cylinder, and one side of the top of the strip is connected to the round plug inside the pressure-regulating cylinder through a push-pull rod;

[0016] The inner wall of the insulating shell and the outer wall of the shielding cylinder together form a temperature sensing cavity. The on-off cylinder is connected to the temperature sensing cavity through a conduction pipe. The interior of the temperature sensing cavity and the pressure regulating cylinder are both filled with clean gas.

[0017] According to the above technical solution, the linkage frame is composed of a long arm and a short arm, the ratio between the difference between the cross-sectional area of ​​the push-pull rod and the top area of ​​the round plug and the top area of ​​the round plug is equal to the ratio between the long arm and the short arm, the strip plate is rotatably connected to the end of the short arm through a connecting plate, the clamping head is clamped on the outer side of the end of the long arm, the top area of ​​the piston is larger than the top area of ​​the round plug, and the difference between the cross-sectional area of ​​the push-pull rod and the top area of ​​the round plug is equal to the bottom area of ​​the plug block.

[0018] According to the above technical solution, a pointer is installed at the end of the rotating shaft, a nameplate is embedded and installed at the position of the pointer on the side end surface of the transmission box, a push plate is installed at the end of the lifting plate, and an indicator plate is symmetrically embedded and installed on the side end surface of the push plate.

[0019] According to the above technical solution, a linkage arc extinguishing mechanism is installed on the outside of the shielding cylinder, and the linkage arc extinguishing mechanism includes a guide bucket;

[0020] A guide bucket is embedded and installed on one side of the outer curved surface of the shielding tube, a shielding cover is installed at the position corresponding to the guide bucket inside the shielding box, a number of arc-extinguishing grids are evenly and equidistantly installed inside the shielding cover, and the arc-extinguishing grids are matched with the guide bucket, a collector tube is installed at the end of the shielding cover, an air supply pipe is installed at the middle of the bottom end of the collector tube, a connecting barrel is installed at the bottom of the collector tube, a pressure relief head is installed on one side of the top of the outer curved surface of the connecting barrel, a bypass pipe is installed at the bottom of the outer curved surface of the pressure relief head, an energy storage box is installed on the other side of the top of the outer curved surface of the connecting barrel, and check valves are installed at the ends of the air supply pipe and the bypass pipe;

[0021] A bolt head is slidably installed inside the pressure relief head, a plugging plate is slidably installed inside the energy storage box, an isolating head is slidably installed at the top of the plugging plate inside the energy storage box, an exhaust pipe is installed at the bottom of the side end surface of the energy storage box, a hollow cooling grid is installed on the side end surface of the shielding box, a cooling pipe is installed inside the hollow cooling grid, an air guide seat is embedded and installed on the other side of the outer curved surface of the shielding cylinder, a connecting pipe is installed in the middle of the side end surface of the air guide seat, and the connecting pipe and the exhaust pipe are respectively connected to the cooling pipe;

[0022] Piston boxes are installed on both side end faces of the transmission box, a delivery pipe is installed on the top of one of the cylinder side end faces, a connecting pipe is installed on the middle of the top of the limit box, and a booster pipe is installed on the bottom of the other cylinder side end face. Valves are installed on the ends of the delivery pipe and the connecting pipe. A piston plate is slidably installed inside the piston box, and a screw is embedded and rotatably installed at the bottom of the piston box, and the screw is connected to the piston plate through a thread.

[0023] According to the above technical solution, the cooling pipe is serpentine, the inner diameter of the cooling pipe is the same as the inner diameter of the connecting pipe, the inner diameter of the cooling pipe is smaller than the inner diameter of the exhaust pipe, the interior of the hollow cooling grid is filled with coolant at the outside of the cooling pipe, and the interior of the shielding tube is filled with SF gas at the outside of the contact.

[0024] According to the above technical solution, the energy storage box is connected to the pressure relief head through a bypass pipe, the connecting barrel is connected to the manifold through an air supply pipe, the interior of the energy storage box is filled with clean gas at the top of the isolation head, an extension tube is installed in the middle of the top of the energy storage box, and an air valve is installed at the end of the extension tube.

[0025] According to the above technical solution, a pressure gauge is embedded and installed on one side of the top of the piston box. The piston box is composed of a partition box and a limit box. The delivery pipe and the connecting pipe are connected to the limit box through a valve, and the on-off cylinder is connected to the partition box through a booster pipe. The interior of the piston box is filled with clean gas at the top of the piston plate.

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

[0027] 1. It is equipped with a double linkage mechanism. Through the cooperation of the on-off cylinder, the push-pull rod and the round plug, a stroke amplification structure can be formed. The volume difference after the internal gas of the temperature sensing chamber absorbs heat and expands can be fully utilized to greatly improve the flexibility of the contacts, enhance the sensitivity of the circuit breaker, and make the circuit breaking operation more timely and effective. It can fully ensure the thoroughness of the disconnection of the contacts on the upper guide rod and the lower guide rod, ensure the effectiveness of the circuit breaking work, and make the circuit breaking work more stable and reliable. With the transmission effect of the support tube and the plug block, a type of isolating switch can be constructed. In addition, with the connecting effect of the conduction pipe and the connecting pipe, the synchronous on-off of the isolating switch can be realized in a variable phase, integrating the on-off effect of the isolating switch and the on-off effect of the circuit breaker, greatly improving the compatibility and adaptability of the on-off effect of the isolating switch and the on-off effect of the circuit breaker;

[0028] With the limiting function of the cylinder, push-pull rod, round plug, lifting plate, limit box, piston and support rod, it can automatically and synchronously regulate the on-off sequence of the electrical socket, electrical plug and contacts, effectively enhance the smoothness of the circuit breaking operation, greatly improve the stability and reliability of the arc extinguishing work during the circuit breaking operation, indirectly enhance the protection effect of the circuit breaker, increase the effective service life of the circuit breaker, and at the same time enhance the safety of the circuit breaking operation of the circuit breaker.

[0029] 2. A lever structure can be constructed by cooperating with the rotating shaft, linkage frame, connecting plate and clamp to amplify the pressure difference. With the insulation shielding effect of the insulating shell and shielding tube and the heat conduction and heat insulation effect, the heat energy emitted during the operation of the circuit breaker can be fully utilized, and sufficient driving force can be provided for the lower guide rod without an additional power source. While improving the energy conversion utilization rate of the circuit breaker to achieve energy conservation and emission reduction, the sufficiency of the circuit breaker power can be guaranteed, and the circuit breaker sensitivity can be further guaranteed;

[0030] At the same time, since the heat emitted by the circuit breaker is used as the power source, the influence of electromagnetic interference on the on-off operation of the circuit breaker can be effectively avoided, and the working state of the circuit breaker can be indirectly monitored, so that the circuit breaking action is more matched with the working state of the circuit breaker, and the circuit breaking is more timely and efficient, and the working performance of the circuit breaker is fully guaranteed. The upper guide rod, the lower guide rod, the contact, the conductive head, the soft wire, the electrical socket and the electrical plug are matched to construct a double on-off structure, which can further enhance the effectiveness and reliability of the on-off operation of the circuit breaker while improving the stability of power transmission.

[0031] 3. A linkage arc extinguishing mechanism is provided. By cooperating with the guide bucket, shielding cover, arc extinguishing grid and air guide seat, a double arc extinguishing structure can be constructed, which effectively combines the advantages of horizontal metal grids and air blowing arc extinguishing, greatly enhances the effectiveness and reliability of arc extinguishing, and double strengthens the arc extinguishing efficiency and arc extinguishing quality, greatly improves the protection effect of contacts, effectively improves the service life of contacts, enables contacts to work more stably and continuously for a long time, improves their durability, and because its power source comes from the heat dissipated at the contacts, the arc extinguishing work can be more compatible and adaptable with the circuit breaker's on-off work, can improve the flexibility and adaptability of the air blowing speed, make the air blowing pressure and arc size change synchronously, take into account the arc generated under different working currents of the circuit breaker, greatly improve the adaptability of arc extinguishing work, indirectly expand the compatibility stability of the circuit breaker, and make the voltage in the circuit breaker operation more stable and reliable.

[0032] 4. Through the coordination of the connecting barrel, the pressure relief head, the bypass pipe, the energy storage box, the check valve, the plugging plate, the isolation head and the bolt head, a gas pressure enhancement structure can be constructed, which can amplify the pressure difference in the flow process of the arc extinguishing medium to promote the stable flow of the arc extinguishing medium. On the one hand, it can fully ensure the smoothness of the flow of the arc extinguishing medium, make the arc extinguishing work more stable and efficient, and make the arc extinguishing efficiency adaptively adjusted with the size of the arc to achieve rapid arc extinguishing. On the other hand, it can enhance the stability and sufficiency of the arc extinguishing power source, further improve the energy utilization rate of the circuit breaker, and improve the energy saving effect;

[0033] By cooperating with the manifold, air supply pipe, exhaust pipe, cooling pipe and connecting pipe, a complete arc extinguishing medium diversion circuit can be constructed. On the one hand, the flow pressure of the arc extinguishing medium can be secondary strengthened by utilizing the pipe diameter difference, thereby improving the dynamic stability of the arc extinguishing operation. On the other hand, it can cooperate with the hollow cooling grid to promote the heat exchange process, fully ensure the temperature stability of the circuit breaker, improve the working effect of the circuit breaker, and extend the service life of the circuit breaker. By cooperating with the piston box, delivery pipe, series pipe, booster pipe, valve, screw and piston plate, an air pressure regulating structure can be constructed, which can conveniently set the working safety pressure of the circuit breaker, flexibly set the effective working range of the circuit breaker, improve the stability and compatibility of the circuit breaker, and at the same time, the circuit breaker can be manually switched on and off to improve the convenience of operation.

[0034] To sum up, the circuit breaker integrates the on-and-off functions of the circuit breaker and the isolating switch, realizes the double linkage and double on-and-off of the circuit breaker operation, and uses the heat generated during the operation of the circuit breaker as the power source, making the circuit breaking operation and arc extinguishing operation more sensitive and efficient, making the circuit breaking operation and arc extinguishing operation more compatible and adaptable, greatly enhancing the stability and effectiveness of the circuit breaker operation, and enhancing its safety of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] 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.

[0036] In the attached picture:

[0037] Figure 1 It is a schematic diagram of the structure of the present invention;

[0038] Figure 2 It is a schematic diagram of the installation structure of the energy storage box of the present invention;

[0039] Figure 3 It is a schematic diagram of the installation structure of the hollow cooling grid of the present invention;

[0040] Figure 4 It is a schematic diagram of the structure of the double linkage mechanism of the present invention;

[0041] Figure 5 It is a schematic diagram of the strip board installation structure of the present invention;

[0042] Figure 6 It is a schematic diagram of the support rod installation structure of the present invention;

[0043] Figure 7 It is a structural schematic diagram of the linkage arc extinguishing mechanism of the present invention;

[0044] Figure 8 It is a schematic diagram of the arc extinguishing grid installation structure of the present invention;

[0045] Numbers in the figure: 100, transmission box; 101, shielding box; 102, isolation box; 103, current transformer; 104, upper terminal; 105, side terminal;

[0046] 200, double linkage mechanism; 201, insulating shell; 202, shielding cylinder; 203, upper guide rod; 204, lower guide rod; 205, cylinder; 206, push-pull rod; 207, round plug; 208, conductive tube; 209, rotating shaft; 210, linkage frame; 211, strip plate; 212, connecting plate; 213, clamp head; 214, contact; 215, conductive head; 216, lifting plate; 217, electric socket; 218, electric plug; 219, soft wire; 220, limit box; 221, piston; 222, support cylinder; 223, plug block; 224, support rod; 225, connecting pipe;

[0047] 2051, on-off cylinder; 2052, pressure regulating cylinder; 2081, temperature sensing chamber; 2091, pointer; 2092, nameplate; 2101, long arm; 2102, short arm; 2161, push plate; 2162, indicator plate;

[0048] 300, linkage arc extinguishing mechanism; 301, guide bucket; 302, shielding cover; 303, arc extinguishing grid; 304, collector tube; 305, air supply pipe; 306, connecting barrel; 307, pressure relief head; 308, bypass pipe; 309, energy storage box; 310, check valve; 311, plugging plate; 312, isolation head; 313, exhaust pipe; 314, hollow cooling grid; 315, cooling pipe; 316, air guide seat; 317, connecting pipe; 318, piston box; 319, delivery pipe; 320, serial pipe; 321, booster pipe; 322, valve; 323, screw; 324, piston plate; 325, bolt head;

[0049] 3091. Extension pipe; 3092. Air valve; 3181. Partition box; 3182. Limit box; 3183. Pressure gauge. DETAILED DESCRIPTION

[0050] The preferred embodiments of the present invention are described below in conjunction with 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.

[0051] Example: Figure 1-8 As shown, the present invention provides a technical solution, a transmission type circuit breaker, comprising a transmission box 100, a plurality of shielding boxes 101 are evenly and equidistantly installed at the top of the transmission box 100, an isolation box 102 is installed in the middle of the side end surface of the shielding box 101, a current transformer 103 is installed at the side end surface of the shielding box 101 at the bottom of the isolation box 102, and a double linkage mechanism 200 is installed inside the transmission box 100;

[0052] The double linkage mechanism 200 includes an insulating shell 201, a shielding cylinder 202, an upper guide rod 203, a lower guide rod 204, a cylinder 205, a push-pull rod 206, a round plug 207, a conductive tube 208, a rotating shaft 209, a linkage frame 210, a strip plate 211, a connecting plate 212, a clamping head 213, a contact 214, a conductive head 215, a lifting plate 216, an electric socket 217, an electric plug 218, a flexible wire 219, a limit box 220, a piston 221, a support cylinder 222, a plug 223, a support rod 224 and a connecting pipe 225.

[0053] An insulating shell 201 is installed inside the shielding box 101, a shielding cylinder 202 is installed inside the insulating shell 201, an upper guide rod 203 is installed on the top of the shielding cylinder 202, a lower guide rod 204 is embedded and slidably installed on the bottom of the shielding cylinder 202, a cylinder 205 is symmetrically embedded and installed on the top edge of the transmission box 100, a push-pull rod 206 is embedded and slidably installed in the middle of the bottom end of the cylinder 205, and a round plug 207 is installed at the top of the push-pull rod 206 located inside the cylinder 205 A conductive tube 208 is embedded in the bottom of the outer curved surface of the insulating shell 201, the bottom of the inner cavity of a cylinder 205 is connected to the end of the conductive tube 208, the inner wall of the insulating shell 201 and the outer wall of the shielding cylinder 202 are combined to form a temperature sensing cavity 2081, the on-off cylinder 2051 is connected to the temperature sensing cavity 2081 through the conductive tube 208, and the inside of the temperature sensing cavity 2081 and the inside of the pressure regulating cylinder 2052 are filled with clean gas, so as to utilize the heat energy during the working process of the circuit breaker;

[0054] A rotating shaft 209 is rotatably mounted on one side of the side end surface of the transmission box 100, and a linkage frame 210 is mounted on the outer side of the rotating shaft 209 at a position inside the transmission box 100. A strip 211 is slidably mounted on the bottom end of the lower guide rod 204 at a position on the top of the linkage frame 210. The insulating shell 201 is made of heat-insulating ceramic material, the shielding tube 202 is made of heat-conducting ceramic material, the strip 211 is made of insulating material, the cylinder 205 is composed of an on-off cylinder 2051 and a pressure regulating cylinder 2052, the clamp 213 is located at the bottom of the on-off cylinder 2051, and the strip 211 One side of the top end is connected to the round plug 207 inside the pressure regulating cylinder 2052 through a push-pull rod 206 to convert heat energy. A connecting plate 212 is rotatably installed at the side end surface of the strip plate 211 near the rotating shaft 209, and the connecting plate 212 is rotatably connected to the end of the linkage frame 210. A clamp 213 is installed at the bottom end of one push-pull rod 206 corresponding to the other end of the linkage frame 210, and the end of the other push-pull rod 206 is connected to the strip plate 211. Contacts 214 are installed at the ends of the upper guide rod 203 and the lower guide rod 204.

[0055] A conductive head 215 is embedded and installed at the position of the current transformer 103 on the side end surface of the shielding box 101, and the conductive head 215 is slidably connected to the lower guide rod 204. A lifting plate 216 is slidably installed inside the isolation box 102, and a pointer 2091 is installed at the end of the rotating shaft 209. A nameplate 2092 is embedded and installed at the position of the pointer 2091 on the side end surface of the transmission box 100. A push plate 2161 is installed at the end of the lifting plate 216, and an indicator plate 2162 is symmetrically embedded and installed on the side end surface of the push plate 2161 to indicate the on-off state of the circuit breaker. An electric socket 217 is embedded and installed on one side of the top of the lifting plate 216;

[0056] An electric plug 218 is installed at the position of the electric socket 217 corresponding to the bottom of the isolation box 102, and soft wires 219 are installed at the ends of the electric plug 218 and the electric socket 217. The upper guide rod 203 and the lower guide rod 204 are both conductive rods. The upper terminal 104 is installed at the top of the upper guide rod 203. The side terminal 105 is embedded and installed at the top of the side end surface of the isolation box 102, and the side terminal 105 is connected to the electric socket 217 through the soft wire 219. The electric plug 218 is connected to the conductive head 215 through the soft wire 219, so as to improve the stability of power transmission;

[0057] A limit box 220 is installed on the top of the lifting plate 216, and a piston 221 is slidably installed inside the limit box 220. A support tube 222 is installed at the bottom of the lifting plate 216, and a plug 223 is slidably installed inside the support tube 222. The linkage frame 210 is composed of a long arm 2101 and a short arm 2102. The ratio between the difference between the cross-sectional area of ​​the push-pull rod 206 and the top area of ​​the round plug 207 and the top area of ​​the round plug 207 is equal to the ratio between the long arm 2101 and the short arm 2102. The strip plate 211 is connected to the short arm 2102 through the connecting plate 212. The end of the arm 2102 is rotatably connected, and the clamping head 213 is clamped on the outer side of the end of the long arm 2101. The top area of ​​the piston 221 is larger than the top area of ​​the round plug 207. The difference between the cross-sectional area of ​​the push-pull rod 206 and the top area of ​​the round plug 207 is equal to the bottom area of ​​the plug block 223, so as to improve the kinetic energy sufficiency of the circuit switching. A support rod 224 is embedded and installed on the other side of the top of the lifting plate 216, and the two ends of the support rod 224 are respectively connected to the piston 221 and the plug block 223, and a connecting pipe 225 is installed in the middle of the bottom end of the support tube 222.

[0058] A linkage arc extinguishing mechanism 300 is installed outside the shielding tube 202, and the linkage arc extinguishing mechanism 300 includes a guide bucket 301, a shielding cover 302, an arc extinguishing grid 303, a collector tube 304, an air delivery pipe 305, a connecting barrel 306, a pressure relief head 307, a bypass pipe 308, an energy storage box 309, a check valve 310, a plugging plate 311, an isolation head 312, an exhaust pipe 313, a hollow cooling grid 314, a cooling pipe 315, an air guide seat 316, a connecting pipe 317, a piston box 318, a delivery pipe 319, a serial pipe 320, a booster pipe 321, a valve 322, a screw 323, a piston plate 324 and a bolt head 325;

[0059] A guide bucket 301 is embedded and installed on one side of the outer curved surface of the shielding tube 202, a shielding cover 302 is installed at the position corresponding to the guide bucket 301 inside the shielding box 101, a number of arc-extinguishing grids 303 are evenly and equidistantly installed inside the shielding cover 302, and the arc-extinguishing grids 303 are matched with the guide bucket 301, a collector tube 304 is installed at the end of the shielding cover 302, an air supply pipe 305 is installed at the middle of the bottom end of the collector tube 304, a connecting barrel 306 is installed at the bottom of the collector tube 304, a pressure relief head 307 is installed on one side of the top of the outer curved surface of the connecting barrel 306, a bypass pipe 308 is installed at the bottom of the outer curved surface of the pressure relief head 307, an energy storage box 309 is installed on the other side of the top of the outer curved surface of the connecting barrel 306, and check valves 310 are installed at the ends of the air supply pipe 305 and the bypass pipe 308;

[0060] A bolt head 325 is slidably installed inside the pressure relief head 307, a plugging plate 311 is slidably installed inside the energy storage box 309, an isolating head 312 is slidably installed inside the energy storage box 309 at the top of the plugging plate 311, the energy storage box 309 is connected to the pressure relief head 307 through a bypass pipe 308, the connecting barrel 306 is connected to the manifold 304 through an air supply pipe 305, the energy storage box 309 is filled with clean gas at the top of the isolating head 312, an extension pipe 3091 is installed in the middle of the top of the energy storage box 309, and a gas valve 3092 is installed at the end of the extension pipe 3091 to enhance the flow pressure of the arc extinguishing medium, and an exhaust pipe 313 is installed at the bottom of the side end surface of the energy storage box 309;

[0061] A hollow cooling grid 314 is installed on the side end face of the shielding box 101, and a cooling pipe 315 is installed inside the hollow cooling grid 314. An air guide seat 316 is embedded and installed on the other side of the outer curved surface of the shielding tube 202. A connecting pipe 317 is installed in the middle of the side end face of the air guide seat 316. The cooling pipe 315 is serpentine, and the inner diameter of the cooling pipe 315 is the same as the inner diameter of the connecting pipe 317. The inner diameter of the cooling pipe 315 is smaller than the inner diameter of the exhaust pipe 313. The inside of the hollow cooling grid 314 is filled with coolant at the outer position of the cooling pipe 315, and the inside of the shielding tube 202 is filled with SF6 gas at the outer side of the contact 214 for arc extinguishing, and the connecting pipe 317 and the exhaust pipe 313 are respectively connected to the cooling pipe 315;

[0062] Piston boxes 318 are installed on both side end surfaces of the transmission box 100, a delivery pipe 319 is installed on the top of the side end surface of one cylinder 205, a connecting pipe 320 is installed in the middle of the top of the limit box 220, and a booster pipe 321 is installed on the bottom of the side end surface of the other cylinder 205. Valves 322 are installed at the ends of the delivery pipe 319 and the connecting pipe 320. A piston plate 324 is slidably installed inside the piston box 318, and a screw 323 is embedded and rotatably installed at the bottom of the piston box 318;

[0063] The screw rod 323 is connected to the piston plate 324 through a thread, and a pressure gauge 3183 is embedded on one side of the top of the piston box 318. The piston box 318 is composed of a partition box 3181 and a limit box 3182. The delivery pipe 319 and the series pipe 320 are connected to the limit box 3182 through a valve 322, and the on-off cylinder 2051 is connected to the partition box 3181 through a booster pipe 321. The interior of the piston box 318 is filled with clean gas at the top of the piston plate 324, so as to adjust and set the air pressure during the operation of the circuit breaker, thereby improving the working flexibility of the circuit breaker.

[0064] Working principle and use process of the present invention: In actual use of the circuit breaker, firstly, the transmission box 100 is placed on the ground in the working area, and the screw rod 323 at the bottom end of the limit box 3182 is rotated to drive the piston plate 324 to move. The piston plate 324 will compress the gas inside the limit box 3182, so that part of the gas enters the pressure regulating cylinder 2052 through the valve 322 and the delivery pipe 319 to compress the top surface of the round plug 207 inside the pressure regulating cylinder 2052, and another part of the gas will pass through the valve 322 through the serial pipe 319 to enter the pressure regulating cylinder 2052. 20 enters each limit box 220, presses the top surface of each piston 221, and the air pressure on the round plug 207 and the top surface of each piston 221 can be limited according to the reading of the pressure gauge 3183. Here, the air pressure on the top surface of the round plug 207 is the maximum air pressure allowed during the operation of the circuit breaker. During the operation of the circuit breaker, when the air pressure on its bottom is greater than the air pressure, the contacts 214 on the upper guide rod 203 and the lower guide rod 204 will be automatically disconnected, and the connection between the electrical socket 217 and the electrical plug 218 will also be disconnected thereafter;

[0065] In the above process, the air pressure on the top surface of the round plug 207 and each piston 221 can be adjusted by controlling the opening and closing of the two valves 322 according to the reading of the pressure gauge 3183. Here, it should be ensured that the pressure on the top surface of the round plug 207 is less than the pressure on the top surface of each piston 221. The smaller the pressure difference between the pressure on the top surface of the round plug 207 and the pressure on the top surface of each piston 221 is, the smaller the time interval between the disconnection of the contacts 214 on the upper guide rod 203 and the lower guide rod 204 from the electrical socket 217 and the electrical plug 218 during the operation of the circuit breaker is.

[0066] Then, the screw rod 323 at the bottom end of the partition box 3181 is rotated to drive the piston plate 324 to move. The piston plate 324 will compress the gas inside the partition box 3181, so that the gas enters the on-off cylinder 2051 through the booster pipe 321, compressing the round plug 207 inside the partition box 3181, forcing it to rise, and it will drag the clamp head 213 to rise synchronously through the push-pull rod 206. The clamp head 213 will drive the linkage frame 210 to deflect around the rotating shaft 209, so that the strip plate 211 is dragged down by the connecting plate 212, forcing each lower guide rod 204 to descend synchronously, so that the contacts 214 on the upper guide rod 203 and the lower guide rod 204 are separated;

[0067] At the same time, the gas entering the on-off cylinder 2051 will also enter each temperature sensing chamber 2081 through the conductive pipe 208, and enter each support tube 222 under the connection of the connecting pipe 225, so that the internal air pressure of the temperature sensing chamber 2081 and each support tube 222 increases synchronously, forcing the plug block 223 to lift the lifting plate 216 through the support rod 224 under the action of air pressure, so that the connection between the electric socket 217 and the electric plug 218 is disconnected. In this process, since the pressure on the top of the piston 221 is greater than the pressure on the top of the round plug 207, that is, the bottom of the plug block 223 needs a larger air pressure to overcome the pressure on the top of the piston 221, it can be ensured that the connection between the electric socket 217 and the electric plug 218 is disconnected after the contacts 214 on the upper guide rod 203 and the lower guide rod 204 are disconnected;

[0068] Then, by connecting the upper terminal 104 and the side terminal 105 to the external power transmission line respectively, and rotating the screw 323 at the bottom of the partition box 3181 to drive the piston plate 324 to reset, the electrical socket 217 and the electrical plug 218 are reinserted, and the contacts 214 on the upper guide rod 203 and the lower guide rod 204 are reconnected, and then the circuit breaker can be put into normal use. It should be added here that: during the resetting process of the piston plate 324 inside the partition box 3181, since the pressure on the top of the piston 221 is greater than the pressure on the top of the round plug 207 inside the pressure regulating cylinder 2052, the piston 221 will slide down first, that is, the contacts 214 on the two upper guide rods 203 and the lower guide rod 204 will be reconnected after the electrical socket 217 and the electrical plug 218 are reinserted, which can effectively improve the safety of electricity use;

[0069] During the use of the circuit breaker, if the circuit has serious overload, short circuit and undervoltage faults, the temperature at the contact 214 will rise, and then the gas in the temperature sensing chamber 2081 will absorb heat and expand due to heat, so that the internal air pressure of the temperature sensing chamber 2081 will rise. The gas in the temperature sensing chamber 2081 will enter the on-off cylinder 2051 through the conductive tube 208 under the action of air pressure, forcing the internal air pressure of the on-off cylinder 2051 to rise, so that the round plug 207 in the partition box 3181 will rise synchronously by dragging the clamping head 213 through the push-pull rod 206 under the action of air pressure, overcome the pressure on the top surface of the round plug 207 in the pressure regulating cylinder 2052, drive the linkage frame 210 to deflect around the rotating shaft 209, and make the strip plate 211 descend under the drag of the connecting plate 212, forcing each lower guide rod 204 to descend synchronously, so that the contacts 214 on the upper guide rod 203 and the lower guide rod 204 are separated to break the circuit;

[0070] At the same time, the gas inside the temperature sensing chamber 2081 will enter each support tube 222 synchronously through the connecting pipe 225 under the action of air pressure, so that the air pressure inside the temperature sensing chamber 2081 and each support tube 222 will be increased synchronously, forcing the plug block 223 to lift the lifting plate 216 through the support rod 224 under the action of air pressure, so that the connection between the electric socket 217 and the electric plug 218 is disconnected. In this process, since the pressure on the top of the piston 221 is greater than the pressure on the top of the round plug 207, that is, the bottom of the plug block 223 needs a larger air pressure to overcome the pressure on the top of the piston 221, it can be ensured that the connection between the electric socket 217 and the electric plug 218 is disconnected after the contacts 214 on the upper guide rod 203 and the lower guide rod 204 are disconnected;

[0071] In the above process, the on-off cylinder 2051, the push-pull rod 206 and the round plug 207 cooperate to form a stroke amplification structure, which can make full use of the volume difference of the internal gas of the temperature sensing chamber 2081 after heat absorption and expansion, so that the circuit breaking operation is more sensitive and the contact 214 on the upper guide rod 203 and the lower guide rod 204 is completely disconnected. The lever structure can be constructed by the cooperation of the rotating shaft 209, the linkage frame 210, the connecting plate 212 and the clamping head 213 to amplify the pressure difference, ensure the sufficiency of the circuit breaking power, and further ensure the circuit breaking sensitivity;

[0072] During the use of the circuit breaker, as the load changes, the temperature at the contact 214 will change accordingly. What remains unchanged is that the temperature at the contact 214 will be higher than the ambient temperature. Under the action of the temperature difference, a corresponding pressure difference will be generated. The SF6 gas inside the shielding tube 202 will flow into the shielding cover 302 through the guide bucket 301, and enter the confluence tube 304 after being diverted by the arc extinguishing grid 303, and then enter the connecting barrel 306 through the air supply pipe 305, and pass through the gap between the plug head 325 and the pressure relief head 307 through the bypass pipe 308 to enter the energy storage box 309. In this process, the SF6 gas will impact the plug head 325. In addition, the flow rate will increase during the process of passing through the gap between the plug head 325 and the pressure relief head 307, resulting in a reduction in pressure, which will force the plug head 325 to rise, and finally the plug head 325 will block the pressure relief head 307, and a water hammer effect will occur at this time.

[0073] Under the water hammer effect, the air pressure inside the connecting barrel 306 will rise sharply, overcoming the air pressure on the top of the isolation head 312, so that the plugging plate 311 pushes the isolation head 312 up, and the SF6 gas inside the connecting barrel 306 will directly enter the energy storage box 309 and enter the cooling pipe 315 through the exhaust pipe 313. After the kinetic energy of the water hammer effect is exhausted, the plugging plate 311 will reset under the action of the pressure difference, and the isolation head 312 will compress the bottom SF6 gas under the action of the top air pressure, further allowing the SF6 gas to enter the exhaust pipe 313, and The plug head 325 will also return to its initial state under the action of its own gravity, and the SF6 gas will be pressurized repeatedly in this way to assist in pressurizing the SF6 gas, forcing the SF6 gas to flow stably under the action of the pressure difference. After the SF6 gas enters the cooling pipe 315, it will exchange heat with the coolant inside the hollow cooling grid 314 to quickly cool down, and then enter the gas guide seat 316 through the connecting pipe 317, and then be sprayed into the shielding tube 202 through the gas guide seat 316, so as to realize the spontaneous circulation of the SF6 gas, promote heat exchange and assist in arc extinguishing.

[0074] It can be seen from the above process that the power of SF6 gas flow comes from the heat energy emitted from the contact 214. During normal use of the circuit breaker, the flow of SF6 gas is relatively slow. When the circuit has serious overload, short circuit, undervoltage and other faults, the temperature at the contact 214 will rise sharply, and the SF6 gas pressure inside the shielding tube 202 will rise significantly. In addition, the water hammer effect and the thinning of the tube diameter of the connecting tube 317 will double the pressure of the SF6 gas. After the SF6 gas is ejected through the gas guide seat 316, it will impact the arc at the contact 214, elongate the arc, and promote the arc to move inside the shielding cover 302. The arc extinguishing grid 303 divides the arc into several short arcs connected in series, so that every two arc extinguishing grids 303 can be regarded as a pair of electrodes. In addition, the arc is elongated, and the arc is extinguished when the arc burning voltage rises.

[0075] Combined with the near-cathode effect of the AC arc and the near-pole voltage drop effect of the DC arc, the stability of arc extinguishing can be effectively guaranteed. In the above process, the arc extinguishing power comes from the heat dissipated from the contact 214, which can make the arc extinguishing work more timely and effective, and the arc extinguishing work is more compatible with the working state of the circuit breaker.

[0076] Finally, it should be noted that the above description is only a preferred example 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 can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transmission type circuit breaker, comprising a transmission box (100), characterized in that: A plurality of shielding boxes (101) are evenly and equidistantly mounted on the top of the transmission box (100); an isolation box (102) is mounted in the middle of the side end surface of the shielding box (101); a current transformer (103) is mounted on the side end surface of the shielding box (101) at the bottom of the isolation box (102); and a double linkage mechanism (200) is mounted inside the transmission box (100); The double linkage mechanism (200) comprises an insulating shell (201); An insulating shell (201) is installed inside the shielding box (101), a shielding cylinder (202) is installed inside the insulating shell (201), an upper guide rod (203) is installed at the top end of the shielding cylinder (202), and a lower guide rod (204) is embedded and slidably installed at the bottom end of the shielding cylinder (202); A cylinder (205) is symmetrically embedded in the edge of the top end of the transmission box (100), a push-pull rod (206) is slidably embedded in the middle of the bottom end of the cylinder (205), and a round plug (207) is installed at the top end of the push-pull rod (206) at a position inside the cylinder (205); A conductive tube (208) is embedded and installed at the bottom of the outer curved surface of the insulating shell (201), and the bottom of an inner cavity of the cylinder (205) is connected to the end of the conductive tube (208); A conductive head (215) is embedded and installed at a position corresponding to the current transformer (103) on the side end surface of the shielding box (101), and the conductive head (215) is slidably connected to the lower guide rod (204); A lifting plate (216) is slidably mounted inside the isolation box (102), an electric socket (217) is embedded and mounted on one side of the top end of the lifting plate (216), an electric plug (218) is mounted at a position corresponding to the electric socket (217) at the bottom end of the isolation box (102), and soft wires (219) are mounted at the ends of both the electric plug (218) and the electric socket (217).

2. A transmission type circuit breaker according to claim 1, characterized in that: The upper guide rod (203) and the lower guide rod (204) are both conductive rods, an upper terminal (104) is installed at the top of the upper guide rod (203), a side terminal (105) is embedded and installed at the top of the side end surface of the isolation box (102), and the side terminal (105) is connected to the electric socket (217) through a soft wire (219), and the electric plug (218) is connected to the conductive head (215) through the soft wire (219).

3. A transmission type circuit breaker according to claim 1, characterized in that: A rotating shaft (209) is rotatably mounted on one side of the side end surface of the transmission box (100); a linkage frame (210) is mounted on the outer side of the rotating shaft (209) at a position inside the transmission box (100); a strip plate (211) is slidably mounted on the bottom end of the lower guide rod (204) at a position on the top of the linkage frame (210); a connecting plate (212) is rotatably mounted on the side end surface of the strip plate (211) near the rotating shaft (209); the connecting plate (212) is rotatably connected to the end of the linkage frame (210); a clamp (213) is mounted on the bottom end of one of the push-pull rods (206) at a position corresponding to the other end of the linkage frame (210); the end of the other push-pull rod (206) is connected to the strip plate (211); and contacts (214) are mounted on the ends of both the upper guide rod (203) and the lower guide rod (204); A limit box (220) is installed on the top of the lifting plate (216), a piston (221) is slidably installed inside the limit box (220), a support tube (222) is installed on the bottom of the lifting plate (216), a plug (223) is slidably installed inside the support tube (222), a support rod (224) is embedded and installed on the other side of the top of the lifting plate (216), and the two ends of the support rod (224) are respectively connected to the piston (221) and the plug (223), and a connecting pipe (225) is installed in the middle of the bottom end of the support tube (222).

4. A transmission type circuit breaker according to claim 3, characterized in that: The insulating shell (201) is made of a heat-insulating ceramic material, the shielding tube (202) is made of a heat-conducting ceramic material, the strip plate (211) is made of an insulating material, the cylinder (205) is composed of an on-off cylinder (2051) and a pressure-regulating cylinder (2052), the clamping head (213) is located at the bottom of the on-off cylinder (2051), and one side of the top end of the strip plate (211) is connected to a round plug (207) inside the pressure-regulating cylinder (2052) via a push-pull rod (206); The inner wall of the insulating shell (201) and the outer wall of the shielding cylinder (202) together form a temperature sensing cavity (2081); the on-off cylinder (2051) is connected to the temperature sensing cavity (2081) via a conduction tube (208); and the interior of the temperature sensing cavity (2081) and the interior of the pressure regulating cylinder (2052) are both filled with clean gas.

5. A transmission type circuit breaker according to claim 3, characterized in that: The linkage frame (210) is composed of a long arm (2101) and a short arm (2102); the ratio between the difference between the cross-sectional area of ​​the push-pull rod (206) and the top area of ​​the round plug (207) and the top area of ​​the round plug (207) is equal to the ratio between the long arm (2101) and the short arm (2102); the strip plate (211) is rotatably connected to the end of the short arm (2102) via a connecting plate (212); the clamping head (213) is clamped to the outer side of the end of the long arm (2101); the top area of ​​the piston (221) is greater than the top area of ​​the round plug (207); and the difference between the cross-sectional area of ​​the push-pull rod (206) and the top area of ​​the round plug (207) is equal to the bottom area of ​​the plug block (223).

6. A transmission type circuit breaker according to claim 3, characterized in that: A pointer (2091) is installed at the end of the rotating shaft (209), a nameplate (2092) is embedded and installed at a position corresponding to the pointer (2091) on the side end surface of the transmission box (100), a push plate (2161) is installed at the end of the lifting plate (216), and an indicator plate (2162) is symmetrically embedded and installed on the side end surface of the push plate (2161).

7. A transmission type circuit breaker according to claim 3, characterized in that: A linked arc extinguishing mechanism (300) is installed outside the shielding cylinder (202), and the linked arc extinguishing mechanism (300) comprises a guide bucket (301); A guide bucket (301) is embedded and installed on one side of the outer curved surface of the shielding tube (202); a shielding cover (302) is installed inside the shielding box (101) at a position corresponding to the guide bucket (301); a plurality of arc extinguishing grids (303) are evenly installed inside the shielding cover (302) at equal intervals, and the arc extinguishing grids (303) fit with the guide bucket (301); a collector tube (304) is installed at the end of the shielding cover (302); and a collector tube (304) is installed at the bottom of the collector tube (304). An air supply pipe (305) is installed at the top of the connecting tube (304), a connecting barrel (306) is installed at the bottom of the confluence tube (304), a pressure relief head (307) is installed on one side of the top of the outer curved surface of the connecting barrel (306), a bypass pipe (308) is installed at the bottom of the outer curved surface of the pressure relief head (307), an energy storage box (309) is installed on the other side of the top of the outer curved surface of the connecting barrel (306), and check valves (310) are installed at the ends of the air supply pipe (305) and the bypass pipe (308); A bolt head (325) is slidably mounted inside the pressure relief head (307), a blocking plate (311) is slidably mounted inside the energy storage box (309), an isolating head (312) is slidably mounted inside the energy storage box (309) at the top of the blocking plate (311), an exhaust pipe (313) is mounted at the bottom of the side end surface of the energy storage box (309), a hollow cooling grid (314) is mounted on the side end surface of the shielding box (101), a cooling pipe (315) is mounted inside the hollow cooling grid (314), an air guide seat (316) is embedded and mounted on the other side of the outer curved surface of the shielding cylinder (202), a connecting pipe (317) is mounted in the middle of the side end surface of the air guide seat (316), and the connecting pipe (317) and the exhaust pipe (313) are respectively connected to the cooling pipe (315); The transmission box (100) is provided with piston boxes (318) on both side end surfaces, a delivery pipe (319) is provided on the top of one side end surface of the cylinder (205), a connecting pipe (320) is provided at the middle of the top of the limit box (220), a boosting pipe (321) is provided on the bottom of the other side end surface of the cylinder (205), valves (322) are provided at the ends of the delivery pipe (319) and the connecting pipe (320), a piston plate (324) is slidably provided inside the piston box (318), a screw rod (323) is rotatably provided in the bottom end of the piston box (318), and the screw rod (323) is connected to the piston plate (324) via a thread.

8. A transmission type circuit breaker according to claim 7, characterized in that: The cooling pipe (315) is serpentine-shaped, the inner diameter of the cooling pipe (315) is the same as the inner diameter of the connecting pipe (317), the inner diameter of the cooling pipe (315) is smaller than the inner diameter of the exhaust pipe (313), the interior of the hollow cooling grid (314) located outside the cooling pipe (315) is filled with coolant, and the interior of the shielding cylinder (202) located outside the contact (214) is filled with SF6 gas.

9. A transmission type circuit breaker according to claim 7, characterized in that: The energy storage box (309) is connected to the pressure relief head (307) via a bypass pipe (308), the connecting barrel (306) is connected to the manifold (304) via an air supply pipe (305), the interior of the energy storage box (309) located at the top of the isolation head (312) is filled with clean gas, an extension tube (3091) is installed at the middle of the top of the energy storage box (309), and a gas valve (3092) is installed at the end of the extension tube (3091).

10. A transmission type circuit breaker according to claim 7, characterized in that: A pressure gauge (3183) is embedded and installed on one side of the top end of the piston box (318). The piston box (318) is composed of a partition box (3181) and a limit box (3182). The delivery pipe (319) and the connecting pipe (320) are connected to the limit box (3182) via a valve (322), and the on-off cylinder (2051) is connected to the partition box (3181) via a booster pipe (321). The interior of the piston box (318) is filled with clean gas at the top position of the piston plate (324).

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