Alternating-current high-voltage rotational symmetric busbar frame circuit breaker

Abstract

The invention discloses an alternating-current high-voltage rotational symmetric busbar frame circuit breaker, and relates to the technical field of electrical equipment, the alternating-current high-voltage rotational symmetric busbar frame circuit breaker comprises a circuit breaker main body of a rectangular frame structure, and the outer wall of one side of the circuit breaker main body is provided with a deflector rod used for efficiently guiding contacts of the circuit breaker main body to be separated. The deflector rod is made of high-strength alloy steel, one end of the deflector rod is in a bent angle shape, the end, close to the circuit breaker body, of the deflector rod is electrically connected with an internal contact of the circuit breaker body, one end of the high-voltage arc-extinguishing chamber is matched with the internal contact of the circuit breaker body in an inserted mode, and the high-voltage arc-extinguishing chamber is in a cube shape. A gas production increasing unit is arranged outside one side of each arc extinguishing grid piece, a back anti-breakdown unit is arranged inside one side of the base, a discontinuous deionization unit is arranged on one side, close to the base, of each arc extinguishing grid piece, and the gas flow rate and the gas volume are increased through the gas production piece, so that gas flow in the high-voltage arc extinguishing chamber is promoted.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical equipment, and particularly to an AC high-voltage rotationally symmetric busbar frame circuit breaker. Background Art

[0002] In a high-voltage environment of AC 800V - 1500V, the AC high-voltage rotationally symmetric busbar frame circuit breaker is a protection device specifically designed for high-voltage and high-current systems. Its background technology involves the comprehensive application of multiple fields to meet the special requirements in the high-voltage environment.

[0003] First of all, high-voltage AC systems are widely used in industries, rail transit, data centers, and new energy fields. These scenarios have extremely high requirements for the stability, safety, and efficiency of power transmission. In the voltage range of 800V - 1500V, the current transmission capacity and the insulation performance of equipment face challenges. Traditional circuit breakers are difficult to meet the requirements in aspects such as arc extinction, heat dissipation, and electromagnetic interference protection. Therefore, designing a high-performance frame circuit breaker has become the key to ensuring the safe operation of high-voltage systems.

[0004] The application of rotationally symmetric busbar technology in this circuit breaker has significantly improved the uniformity of current distribution. Compared with the traditional busbar structure, the rotationally symmetric design can effectively reduce current concentration and local overheating problems, while optimizing the electromagnetic field distribution and improving the conduction efficiency of the circuit. The introduction of the frame structure has enhanced the mechanical strength and vibration resistance of the circuit breaker, enabling it to withstand electromagnetic shocks and external forces in the high-voltage environment.

[0005] In addition, this circuit breaker is usually equipped with a high-performance arc extinguishing chamber. Through means such as arc-shaped plate gas production and pressure increase technology and deionization grids, it can quickly extinguish high-voltage arcs, preventing insulation failure and equipment damage caused by too long arcs. The rotationally symmetric busbar also further reduces the contact resistance and power consumption of the electrical system, improving the stability and safety of the system; However, there are still the following defects in specific use: 1. When the arc jumps or spreads outside the circuit breaker body, it will damage the insulation structure of the equipment. The high-temperature arc may burn the insulation material, resulting in internal short circuits or leakage in the circuit breaker; the circuit breaker cannot completely cut off the circuit, which may cause the system to be unable to interrupt the fault current in time, increasing the fault duration and damage scope.

[0006] 2. In addition, during the process of extinguishing high-voltage arcs, a large number of free electrons and ions will be generated. The free electrons and ions will reduce the insulation strength of the gas in the arc area, forming a conductive path and making the arc easier to maintain and extend its lifespan. This increases the difficulty of arc extinction of the circuit breaker and may cause the circuit breaker to be unable to quickly cut off the fault current; the existence of free electrons and ions causes the arc to continuously release high-frequency electromagnetic waves, interfering with surrounding communication systems, automation equipment, or control equipment.

[0007] In view of the above, the present invention provides an alternating current high-voltage rotationally symmetric busbar frame circuit breaker to make up for and improve the deficiencies of the existing technology. Summary of the Invention

[0008] To solve the above technical problems, the present invention provides an alternating current high-voltage rotationally symmetric busbar frame circuit breaker to solve the technical problems raised in the above background art.

[0009] To achieve the above object, the technical solution adopted by the present invention is as follows: an alternating current high-voltage rotationally symmetric busbar frame circuit breaker, including a circuit breaker main body with a rectangular frame structure. On one outer wall of the circuit breaker main body, there is a lever for efficiently guiding the separation of the contacts of the circuit breaker main body. The lever is made of high-strength alloy steel and one end is bent at an angle. The end of the lever close to the circuit breaker main body is electrically connected to the internal contact of the circuit breaker main body. Inside one side of the circuit breaker main body, there are multiple high-voltage arc extinguishing chambers for effectively extinguishing arcs. One end of the high-voltage arc extinguishing chamber is in plug-in fit with the internal contact of the circuit breaker main body and the high-voltage arc extinguishing chamber is in a cube shape. On one outer wall of the high-voltage arc extinguishing chamber, there are arc extinguishing grid plates for quickly absorbing and dispersing the heat generated by the arc. The arc extinguishing grid plates are composed of multiple metal sheet grids. On the outer wall of the arc extinguishing grid plates, there is a base for supporting the stable position of the arc extinguishing grid plates inside the circuit breaker main body. On one outer wall of the base, there is a bottom plate for quickly guiding the heat from the arc extinguishing grid plates and the high-voltage arc extinguishing chamber and dissipating it to the external environment. At the top of the arc extinguishing grid plates, there is a top cover for ensuring that high-temperature substances will not splash out through sealed protection. On one outer side of the arc extinguishing grid plates, there is a gas production increasing unit. Inside one side of the base, there is a back anti-breakdown unit. On one side of the arc extinguishing grid plates close to the base, there is an intermittent deionization unit; The gas production increasing unit is used to guide the arc and accelerate the gas flow; The back anti-breakdown unit is used to prevent the arc from reversely breaking down other electrical components of the high-voltage arc extinguishing chamber; The intermittent deionization unit is used to provide a large contact area to attract and eliminate free electrons.

[0010] Further, the gas production increasing unit includes a gas production part and a protection plate; The gas production part is threadedly connected to the base through bolts to form a fastening structure. The gas production part is in a bent semi-circular shape. The gas production part is made of high thermal conductivity copper alloy material. The gas production part and the top cover are connected by bolts; The protection plate is threadedly connected to the gas production part through bolts to form a fastening structure. The protection plate is in a shell shape and closely adheres to the gas production part. The protection plate is made of high-temperature resistant ceramic material.

[0011] Further, on the side of the arc-proof plate facing the arc extinguishing grid plates, there are two columns of multiple protruding parts arranged vertically at intervals in the horizontal direction, and the multiple protruding parts of the two columns are arranged staggeredly. The adjacent two protruding parts belonging to the two columns are clamped and matched with the arc extinguishing grid plates. Heat dissipation openings are arranged on the arc-proof plate between two adjacent protruding parts in the same column, and the heat dissipation openings are located between two adjacent arc extinguishing grid plates; on the outer wall of the arc-proof plate away from the arc extinguishing grid plates, a transverse baffle parallel to the arc extinguishing grid plates is fixedly arranged, and the transverse baffle is arranged close to the top cover; on the outer wall of the arc-proof plate away from the arc extinguishing grid plates, there are several heat dissipation grooves, and the several heat dissipation grooves are distributed in two columns, corresponding to and respectively communicating with the two columns of heat dissipation openings, and the several heat dissipation grooves are respectively arranged above and below the transverse baffle.

[0012] Further, the intermittent deionization unit includes a deionization net and a gas-dispersing fin; The deionization net is fixedly connected to the outer wall below the side of the arc-proof plate away from the arc extinguishing grid plates. The deionization net is rectangular in shape. The material of the deionization net is copper wire mesh metal material. A plurality of uniformly distributed holes are formed on the surface of the deionization net. The side of the deionization net away from the arc-proof plate corresponds to the high-voltage arc extinguishing chamber. The initial position of the deionization net fits at several heat dissipation grooves arranged below the transverse baffle; The gas-dispersing fin is fixedly connected to the outer wall above the side of the arc-proof plate away from the arc extinguishing grid plates. The gas-dispersing fin is in a honeycomb grid shape. The material of the gas-dispersing fin is stainless steel. The initial position of the gas-dispersing fin fits at several heat dissipation grooves arranged above the transverse baffle.

[0013] Compared with the prior art, the beneficial effects of the present invention are: (1) The gas-generating part of the present invention increases the gas flow rate and gas volume, which promotes the gas flow in the high-voltage arc extinguishing chamber. When an arc occurs, the pressurized airflow can quickly cool the arc zone, reduce the temperature of the arc, and inhibit the continued development of the arc, thereby reaching the arc extinguishing state more quickly; through the strong gas flow, the temperature of the arc zone can drop rapidly, ensuring that the arc current is eliminated in an instant, thereby reducing the risk of thermal damage and continuous arcing. This efficient airflow driving force significantly improves the breaking capacity of the circuit breaker body, especially in the case of high current faults; the pressurized gas helps to effectively dissipate heat and extinguish the arc by strengthening the power of the airflow, preventing the repeated generation of arcs due to uneven airflow. Therefore, it can maintain stable operation in a complex electrical environment and avoid faults caused by incomplete arc extinguishing or arc reignition; the gas pressurization effect accelerates the arc extinguishing time, enabling the circuit breaker body to complete the switching action in a shorter time, preventing the equipment from being damaged by the long-term existence of the arc. Shortening the arc existence time helps to improve the reliability of the circuit breaker body and extend the service life of the equipment; the pressurized airflow can not only extinguish the arc more effectively, but also form a gas barrier to prevent the arc from spreading or splashing outside the high-voltage arc extinguishing chamber. This gas barrier effectively limits the spread of the arc and eliminates the arcing phenomenon; the flow of gas not only cools the arc, but also reduces the fluctuation of the current during the arc extinguishing process. This can avoid the phenomenon of "jumping" or "oscillating" of the current during the arc extinguishing process, thereby ensuring the stable and correct current interruption action of the circuit breaker body; (2) The anti-penetration plate of the present invention can effectively suppress the speed of arc expansion. The anti-penetration plate can provide an additional gas flow path for the high-voltage arc extinguishing chamber, help to quickly cool the arc area, quickly disperse heat and reduce the duration of the arc. By reducing the spread of the arc to other areas of the high-voltage arc extinguishing chamber, the anti-penetration plate reduces the concentration of arc energy, thereby improving the breaking capacity of the circuit breaker body, and then quickly and completely cut off the current; the anti-penetration plate prevents high-temperature arc or electrical breakdown from damaging other parts of the high-voltage arc extinguishing chamber by optimizing the electric field distribution and airflow path. The anti-penetration plate can ensure that the gas flow and electric field distribution remain stable after the arc is extinguished, avoiding the arc from re-igniting. This ensures that the breaking action of the circuit breaker body is completed at one time, reduces the possibility of repeated triggering of the switch, and improves the reliability of operation; the anti-penetration plate helps to establish a stable airflow barrier by changing the mode and direction of airflow flow, ensuring that the arc can be effectively extinguished inside the high-voltage arc extinguishing chamber. The structural design of the anti-penetration plate helps to control the direction and extinguishing process of the arc. By effectively guiding the arc, it is prevented from spreading from the high-voltage arc extinguishing chamber to the outside, while ensuring that the gas flows evenly in the high-voltage arc extinguishing chamber, reducing the risk of arc jumping; the anti-penetration plate guides the flow of air to help evenly disperse the high temperature generated by the arc. This airflow guidance helps prevent local overheating and ensures that the temperature in the high-voltage arc extinguishing chamber remains within a reasonable range; (3) Through its special structure, the deionization grid of the present invention can quickly capture and neutralize free electrons, reducing their impact on the arc duration, thereby accelerating the extinction of the arc. The deionization grid helps to disperse the gas flow more evenly, improving the gas flow efficiency in the high-voltage arc extinguishing chamber, and thus reducing the accumulation of arc temperature. By eliminating free electrons, the deionization grid helps to maintain a stable gas flow, enabling the gas to effectively carry away the heat generated by the arc in a short time, thereby accelerating the arc extinguishing process and enhancing the breaking capacity of the circuit breaker body; the deionization grid can quickly eliminate free electrons, thereby reducing the arc duration and heat accumulation. This heat control helps to reduce material aging and damage caused by equipment overheating, thereby improving the reliability of the circuit breaker body; the deionization grid captures and neutralizes free electrons, reducing the accumulation of arc energy and shortening the arc duration. This effectively reduces the probability of the arc jumping outside the circuit breaker body, thereby avoiding the flashover phenomenon. The deionization grid can help balance the gas flow in the high-voltage arc extinguishing chamber, making the gas flow more uniform, thereby avoiding the instability of the arc during the extinguishing process. The stability of the gas flow reduces the possibility of arc spread, ensures the smooth completion of the arc extinguishing process, and avoids the risk of arc spreading to the outside; by eliminating the effect of free electrons, the deionization grid reduces the energy release time of the arc, helping to extinguish the arc more quickly. This means that the circuit breaker body can complete the current interruption in a shorter time, avoiding equipment damage caused by too long arc duration; BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a front view three-dimensional structure schematic diagram of the present invention; Figure 2 is a partial three-dimensional structure schematic diagram of the high-voltage arc extinguishing chamber of the present invention; Figure 3 is a separated sectional partial three-dimensional structure schematic diagram of the high-voltage arc extinguishing chamber of the present invention; Figure 4 is a partial three-dimensional structure schematic diagram of the positional relationship of the anti-penetration plate of the present invention; Figure 5 is a partial three-dimensional structure schematic diagram of the positional relationship of the deionization grid of the present invention; Figure 6 is a partial three-dimensional structure schematic diagram of the positional relationship between the anti-penetration plate and the arc extinguishing grid sheets of the present invention; Figure 7 is a partial three-dimensional structure schematic diagram of the symmetrical busbar with rotary disassembly of the present invention.

[0015] The reference numerals in the figures are: 1, circuit breaker body; 11, lever; 12, high-voltage arc extinguishing chamber; 13, base; 14, bottom plate; 15, arc extinguishing grid sheets; 16, top cover; 21, gas generating part; 22, protection plate; 31, anti-penetration plate; 32, connecting piece; 41, deionization grid; 42, gas diffusing piece. DETAILED DESCRIPTION OF THE INVENTION

[0016] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention; As Figure 7 shown, when the present invention is in use, a busbar is required. The busbar provides a centralized connection point, bringing the electrical connections of multiple devices together, simplifying the wiring work. The design of the busbar is usually optimized to withstand large current loads and has good heat dissipation. The busbar is not only convenient for the initial installation of the system, but also for later maintenance and expansion.

[0017] In the normal operation of the power system, the rotationally detachable symmetrical busbar mainly functions to connect the circuit breaker body 1 with other parts of the power system. Importantly, the busbar supports both horizontal and vertical wiring methods, which provides great flexibility for wiring in different scenarios. Secondly, the rotating busbar is usually connected to the circuit breaker body 1 by means of rotary fasteners, plug-in or bolt fixation, etc., supporting both horizontal and vertical wiring methods, and can be flexibly adjusted according to the actual installation environment to meet complex wiring requirements.

[0018] The rotationally detachable symmetrical busbar includes a busbar, a fixed contact, a rotating contact, a welded connection conductive component, an insulating support, a rotating shaft, an elastic device, and a protective cover; One end of the busbar is connected to the external main busbar, and the other end is provided with a fixed contact. The busbar is horizontally arranged in two columns, each column containing four busbars. The four busbars in each column respectively correspond to three-phase currents (A, B, C) and grounding (PE). The busbar adopts a flat strip-shaped structure, and the material of the busbar is a copper bar with high conductivity. The busbar is connected to the fixed contact by bolts. Among them, the busbars of the three-phase currents are connected to the main circuit of the circuit breaker body 1, and the grounded busbar is directly connected to the grounding system; The fixed contact is connected to the busbar by bolts. The fixed contact adopts an L-shaped plate structure and the contact surface is designed with multi-point contact; The rotating contact is butted with the fixed contact to form an electrical connection point. The rotating contact is usually in an arc structure and the contact part with the fixed contact is designed as a polished surface. The material of the rotating contact is a copper alloy with high conductivity; The welded connection conductive component is located at the movable part of the rotating busbar and is connected to the rotating contact. The welded connection conductive component is usually in a strip structure, and the material is a copper bar with high conductivity. The rotating contact is connected to the welded connection conductive component by bolts, and the other end of the welded connection conductive component is connected to the internal circuit of the circuit breaker body 1; The insulating support is fixed to the frame of the circuit breaker body 1 by bolts and is separated from the busbar and the contact system at the same time. The insulating support adopts a frame-like structure and is made of epoxy resin. The initial positions of the insulating supports are distributed at the base and the side of the rotating busbar; The rotating shaft is connected to the rotating contact through a keyway thread, and the other end of the rotating shaft is connected to the operating mechanism. The rotating shaft passes through the center of the rotating busbar. The rotating shaft is a hollow shaft-like structure and is made of high-strength stainless steel; The elastic device is installed between the rotating contact and the fixed contact. The elastic device is usually a helical spring, and the material is selected as spring steel with excellent fatigue resistance; The protective cover is fixed to the shell of the circuit breaker body 1 by a buckle. The protective cover covers the outside of the rotating busbar. The protective cover adopts an arc-shaped closed structure and is made of polycarbonate with high temperature resistance and impact resistance.

[0019] During installation, first check whether the interfaces of the busbar and the circuit breaker body 1 are clean, confirm that the specifications match and align the connection terminals; then complete the connection by rotation or insertion and fix it with a buckle or bolts; finally, conduct electrical detection to ensure good contact before putting it into operation. During disassembly, first cut off the power to ensure safety, then loosen the buckle or bolts, disassemble the busbar smoothly and check its condition for reuse; The technical features of the rotating busbar ensure its reliability and efficiency. Most of its materials are copper or aluminum with high conductivity, and the surface is treated with silver plating or tin plating to reduce the contact resistance and improve the antioxidant and anti-corrosion capabilities; the contact surface is designed precisely to ensure low resistance and high current transmission capacity. The outside is covered with insulating materials such as heat shrinkable tubes or insulating coatings to provide excellent insulation performance and adapt to the high-voltage operating environment. Seismic resistance and durability are also its key features. Through the design of high-strength materials and a stable structure, the rotating busbar can still maintain reliable mechanical connections and electrical performance in a vibrating or impact environment. In addition, the modular design enables it to flexibly adjust the length or number of sections according to needs, facilitating expansion and maintenance. The optimized heat dissipation structure effectively reduces the operating temperature and ensures the long-term stability of the system. In the horizontal wiring mode, the busbar is connected in parallel with multiple circuit breaker bodies 1, which is suitable for occasions with relatively loose space. Through the rotating disassembly function, the staff can conveniently disconnect the electrical connection for fault handling or equipment replacement. When faults such as overload or short circuit occur, the rotating disassembly mechanism of the busbar and the circuit breaker body 1 can quickly disconnect to ensure that the fault current is cut off and damage to other equipment is avoided; In the vertical connection mode, the busbar and the circuit breaker body 1 are connected in a vertical direction. This arrangement is particularly suitable for environments with relatively compact spaces. The vertical connection not only saves floor space but also maintains stable current transmission and can be easily disconnected through a rotary disassembly mechanism. Whether it is horizontal or vertical wiring, the symmetrical design of the busbar can ensure uniform distribution of current load and improve the stability of the power system; When new electrical equipment needs to be added, it can simply be connected to the busbar without the need to re-arrange a complex cable system. Finally, the busbar can achieve efficient connection between electrical equipment and ensure stable current transmission. Without a busbar, each electrical equipment would need to be individually wired, which may lead to unstable connections and increase the risk of electrical system failures.

[0020] Embodiments of the present invention AC high-voltage rotating symmetric busbar frame circuit breaker, refer to Figure 1 As shown, it includes a circuit breaker body 1 with a rectangular frame structure. On one outer wall of the circuit breaker body 1, there is a lever 11 for efficiently guiding the separation of the contacts of the circuit breaker body 1. The lever 11 is made of high-strength alloy steel and one end is bent at an angle. The end of the lever 11 close to the circuit breaker body 1 is electrically connected to the internal contacts of the circuit breaker body 1. Inside one side of the circuit breaker body 1, there are multiple high-voltage arc extinguishing chambers 12 for effectively extinguishing arcs. One end of the high-voltage arc extinguishing chamber 12 is in plug-in fit with the internal contacts of the circuit breaker body 1 and the high-voltage arc extinguishing chamber 12 is cube-shaped. On one outer wall of the high-voltage arc extinguishing chamber 12, there is an arc extinguishing grid 15 for quickly absorbing and dispersing the heat generated by the arc. The arc extinguishing grid 15 is composed of multiple metal sheet grids. On the outer wall of the arc extinguishing grid 15, there is a base 13 for supporting the stable position of the arc extinguishing grid 15 inside the circuit breaker body 1. On one outer wall of the base 13, there is a bottom plate 14 for quickly conducting and dissipating the heat from the arc extinguishing grid 15 and the high-voltage arc extinguishing chamber 12 to the external environment. At the top of the arc extinguishing grid 15, there is a top cover 16 for ensuring that high-temperature substances do not splash out through sealed protection; In view of the above AC high-voltage rotating symmetric busbar frame circuit breaker, it can be specifically implemented as follows: On the outside of one side of the arc extinguishing grid 15, there is a gas production increasing unit. Inside one side of the base 13, there is a back anti-breakdown unit. On the side of the arc extinguishing grid 15 close to the base 13, there is an intermittent deionization unit; Refer to Figure 2 As shown, the gas production increasing unit is used to guide the arc and accelerate gas flow; Refer to Figure 2 As shown, the gas production increasing unit includes a gas production part 21 and a protection plate 22; The gas production part 21 is threadedly connected to the base 13 through bolts to form a fastening structure. The gas production part 21 is in a bent semi-circular shape and is made of high-thermal conductivity copper alloy material; The protection plate 22 is threadedly connected to the gas generating component 21 through bolts to form a fastening structure. The protection plate 22 is shell-shaped and closely adheres to the gas generating component 21. The gas generating component 21 is made of high-temperature resistant ceramic material; Summary 1: Compared with the prior art, when a short circuit occurs in a high-voltage current, the high temperature and current generated by the arc will cause great pressure on the arc extinguishing system. The gas generating component 21 of the present invention increases the gas flow rate and gas volume, which has a promoting effect on the gas flow in the high-voltage arc extinguishing chamber 12. When an arc occurs, the pressurized air flow can quickly cool the arc area, reduce the temperature of the arc, inhibit the continuous development of the arc, and then reach the arc extinguished state faster; through the strong gas flow, the temperature of the arc area can quickly drop, ensuring the instantaneous elimination of the arc current, thereby reducing the risk of thermal damage and continuous arc. This efficient air flow driving force significantly improves the breaking capacity of the circuit breaker main body 1, especially in the case of large current faults; the pressurized gas helps to effectively dissipate heat and extinguish the arc by strengthening the power of the air flow, preventing the repeated generation of the arc due to uneven air flow. Thus, the circuit breaker main body 1 can operate stably in a complex electrical environment, avoiding faults caused by incomplete arc extinguishing or re-ignition of the arc; the gas pressurization effect accelerates the arc extinguishing time, enabling the circuit breaker main body 1 to complete the switching action in a shorter time, preventing the equipment from being damaged due to the long-term existence of the arc. Shortening the arc existence time helps to improve the reliability of the circuit breaker main body 1 and extend the service life of the equipment; the pressurized air flow can not only extinguish the arc more effectively, but also form a gas barrier to prevent the arc from spreading or splashing outside the high-voltage arc extinguishing chamber 12. This gas barrier effectively limits the spread range of the arc and eliminates the flashover phenomenon; the gas flow not only cools the arc, but also reduces the fluctuation of the current during the arc extinguishing process. This can avoid the "jumping" or "oscillating" phenomenon of the current during the arc extinguishing process, thus ensuring the stable and error-free current interruption action of the circuit breaker main body 1.

[0021] Reference Figure 3 As shown, the back anti-breakdown unit is used to prevent the arc from reversely breaking down other electrical components in the high-voltage arc extinguishing chamber 12; Reference Figure 4 As shown, the back anti-breakdown unit includes an anti-penetration plate 31 and a connecting piece 32; The side of the anti-penetration plate 31 facing the arc-extinguishing grid 15 is provided with two rows of multiple raised portions arranged at intervals in a horizontal direction, and the multiple raised portions of the two rows are arranged in a staggered manner, and two adjacent raised portions belonging to the two rows are snap-fitted with the arc-extinguishing grid 15, and a heat dissipation port is provided on the anti-penetration plate 31 between two adjacent raised portions in the same row, and the heat dissipation port is located between two adjacent arc-extinguishing grids 15; a transverse baffle parallel to the arc-extinguishing grid 15 is fixedly provided on the outer wall of the anti-penetration plate 31 on the side away from the arc-extinguishing grid 15, and the transverse baffle is arranged close to the top cover 16; a plurality of heat dissipation grooves are provided on the outer wall of the anti-penetration plate 31 on the side away from the arc-extinguishing grid 15, and the plurality of heat dissipation grooves are distributed in two rows, and correspond to and are respectively connected with the heat dissipation ports in the two rows, and the plurality of heat dissipation grooves are respectively arranged above and below the transverse baffle; The connecting piece 32 is clamped on the outer wall of the top end of the anti-penetration plate 31 , and the connecting piece 32 is threadedly connected to the base 13 through bolts to form a fastening structure.

[0022] Summary 2: Compared with the prior art, in which the arc jumps or spreads to the outside of the circuit breaker body 1 during the arc extinguishing process, which may cause equipment damage or fire and other hazards, the anti-penetration plate 31 of the present invention can effectively suppress the speed of arc expansion, and the anti-penetration plate 31 can provide an additional gas flow path for the high-voltage arc extinguishing chamber 12, which helps to quickly cool the arc area, quickly disperse heat and reduce the duration of the arc. By reducing the spread of the arc to other areas of the high-voltage arc extinguishing chamber 12, the anti-penetration plate 31 reduces the concentration of arc energy, thereby improving the breaking capacity of the circuit breaker body 1, and then quickly and completely cutting off the current; the anti-penetration plate 31 optimizes the electric field distribution and the airflow path to prevent high-temperature arcs or electrical breakdown from damaging other parts of the high-voltage arc extinguishing chamber 12. The anti-penetration plate 31 can ensure that after the arc is extinguished, the gas flow and electric field distribution remain stable to avoid the reignition of the arc. This ensures that the breaking action of the circuit breaker body 1 is completed at one time, reduces the possibility of repeated triggering of the switch, and improves the reliability of operation; the anti-penetration plate 31 helps to establish a stable airflow barrier by changing the flow mode and direction of the airflow, ensuring that the arc can be effectively extinguished inside the high-voltage arc extinguishing chamber 12. The structural design of the anti-penetration plate 31 helps to control the direction and extinguishing process of the arc. By effectively guiding the arc, it is prevented from spreading from the high-voltage arc extinguishing chamber 12 to the outside, while ensuring that the gas flows evenly in the high-voltage arc extinguishing chamber 12, reducing the risk of arc jumping; the anti-penetration plate 31 helps to evenly disperse the high temperature generated by the arc by guiding the airflow. This airflow guiding effect helps to prevent local overheating and ensure that the temperature in the high-voltage arc extinguishing chamber 12 remains within a reasonable range.

[0023] refer to Figure 5 As shown, the intermittent deionization unit is used to provide a large contact surface so that the free electrons are attracted and eliminated; refer to Figure 5As shown, the wandering net 41 is rectangular, and the material of the wandering net 41 is a copper wire mesh metal material. A plurality of evenly distributed holes are opened on the surface of the wandering net 41, and the side of the wandering net 41 away from the anti-penetration plate 31 corresponds to the high-voltage arc extinguishing chamber 12; The air diffuser 42 is fixedly connected to the upper outer wall of the anti-penetration plate 31 on the side away from the arc-extinguishing grid 15 . The air diffuser 42 is in a honeycomb grid shape and is made of stainless steel.

[0024] Summary 3: Compared with the prior art, a large number of free electrons and ions will be generated during the high-voltage arc extinguishing process. These free electrons will increase the duration and energy of the arc and prolong the arc extinguishing process. The free electron elimination net 41 of the present invention can quickly capture and neutralize the free electrons through its special structure, reduce its influence on the arc duration, and thus accelerate the extinguishing of the arc. The free electron elimination net 41 helps to disperse the gas flow more evenly, improves the gas flow efficiency in the high-voltage arc extinguishing chamber 12, and thus reduces the accumulation of arc temperature. By eliminating free electrons, the free electron elimination net 41 helps to maintain the stability of the gas flow, so that the gas can effectively take away the heat generated by the arc in a short time, thereby accelerating the arc extinguishing process and enhancing the breaking capacity of the circuit breaker body 1; the free electron elimination net 41 can quickly eliminate free electrons, thereby reducing the arc duration and heat accumulation. This heat control helps to reduce material aging and damage caused by overheating of the equipment, thereby improving the reliability of the circuit breaker body 1; the free electron elimination net 41 reduces the accumulation of arc energy by capturing and neutralizing free electrons, and the duration of the arc is also shortened. This effectively reduces the probability of the arc jumping to the outside of the circuit breaker body 1, thereby avoiding the arcing phenomenon. The ion elimination net 41 can help balance the airflow in the high-voltage arc extinguishing chamber 12, making the airflow flow more even, thereby avoiding the instability of the arc during the extinguishing process. The stability of the airflow reduces the possibility of arc spread, ensures the smooth completion of the arc extinguishing process, and avoids the risk of arc spreading to the outside; the ion elimination net 41 reduces the energy release time of the arc by eliminating the effect of free electrons, which helps to extinguish the arc more quickly. This means that the circuit breaker body 1 can complete the current cutoff in a shorter time, avoiding equipment damage caused by the arc lasting too long.

[0025] The complete working principle and steps of the above embodiment are as follows: Initial definition: The circuit breaker body 1 is an important protective device in the power system. Its main function is to quickly cut off the current and prevent equipment damage when the system has a short circuit or overload fault. The working process of the entire circuit breaker body 1 involves the coordinated action of multiple core components, including the lever 11, the high-voltage arc extinguishing chamber 12, the base 13, the bottom plate 14, the arc extinguishing grid 15 and the top cover 16. These components work together to ensure that the circuit breaker body 1 can reliably and quickly disconnect the circuit under high-voltage conditions, and effectively extinguish the arc to ensure the stable operation of the system.

[0026] During the operation of the circuit breaker main body 1, first, when the power system detects abnormal current, such as overload or short - circuit fault, the control system senses the fault signal through the sensor and activates the lever 11. As a control component of the circuit breaker main body 1, the lever 11 is activated electrically or manually. After receiving the signal, it will trigger the actions of other key components. The function of the lever 11 is to transmit the current - cut - off signal to the high - voltage arc - extinguishing chamber 12 to ensure that the circuit can be disconnected in time.

[0027] With the activation of the lever 11, the contacts inside the circuit breaker quickly separate, and at this time, an arc is formed between the contacts. To prevent the arc from damaging the equipment, the arc - extinguishing grid 15 plays a key role at this time. The arc - extinguishing grid 15 is composed of multiple metal grids. Its arrangement and design purpose are to disperse the energy of the arc, extend the arc - extinguishing time, and rapidly dissipate the heat of the arc. The arc - extinguishing grid 15 accelerates the arc - extinguishing process through a special air - flow guiding effect, preventing the arc from persisting and causing equipment overheating or damage.

[0028] Under the action of the arc - extinguishing grid 15, while the arc gradually dissipates, the insulating gas such as SF6 gas in the high - voltage arc - extinguishing chamber 12 also begins to play a role. The high - voltage arc - extinguishing chamber 12 is designed as a sealed structure. When the arc is formed, the gas will quickly expand and flow, absorbing the heat generated by the arc, thereby reducing the temperature of the arc and further accelerating the arc - extinguishing process. The insulating performance of SF6 gas is very excellent. It can effectively isolate the current after the arc is extinguished, ensuring the electrical isolation between the contacts and preventing the danger of back - current or re - contact.

[0029] Meanwhile, the base 13 and the bottom plate 14 play important mechanical support and stabilization roles throughout the process. The base 13 is the main support component of the circuit breaker main body 1. It can effectively withstand the pressure fluctuations during the arc - extinguishing process, ensuring the stable operation of the circuit breaker main body 1. The bottom plate 14 is located at the bottom of the circuit breaker main body 1 and is mainly used to fix and support other key components, ensuring the stable operation of each component under high - voltage conditions. When the arc is extinguished, the heat and gas expansion generated in the high - voltage arc - extinguishing chamber 12 will exert instantaneous pressure on the interior of the equipment. The strength and stability of the base 13 and the bottom plate 14 enable the entire circuit breaker main body 1 to withstand these pressure fluctuations and prevent component deformation or damage.

[0030] The top cover 16 of the circuit breaker main body 1 plays a role of sealing and protection. During the arc - extinguishing process, the top cover 16 protects the high - voltage arc - extinguishing chamber 12 from the external environment, preventing external pollutants from entering the high - voltage arc - extinguishing chamber 12. At the same time, the top cover 16 can effectively prevent the leakage of insulating gas, ensuring that the high - voltage environment inside the equipment is not damaged. In addition, the sealing performance of the top cover 16 can also prevent the leakage of high - temperature gas, protecting the equipment from high - temperature and gas - diffusion damage.

[0031] During the entire working process, the coordinated operation of all components ensures that the circuit breaker body 1 can quickly and effectively cut off the circuit under high voltage conditions, and can rapidly reduce the temperature of the arc during the arc extinguishing process to avoid equipment damage. The lever 11 drives the contacts to separate and generate an arc by activating the control system of the entire circuit breaker. The design of the arc extinguishing grid 15 can effectively disperse the energy of the arc and accelerate its extinction, while the flow of insulating gas helps to cool down and prevent the arc from reigniting. The base 13 and the bottom plate 14 provide stable support to ensure that the equipment is not affected by pressure fluctuations during the arc extinguishing process. Finally, the top cover 16 serves as a protection and sealing component to ensure the sealing and safety of the equipment; When in use: Steps of the gas production increasing unit for guiding the arc and accelerating the gas flow: As Figure 2 shown, when the high temperature and intensity of the arc cause the gas in the high-voltage arc extinguishing chamber 12, such as SF6 gas, to be rapidly heated and expanded, thus forming a high-temperature arc. At this time, after the arc strongly heats the contact surface and releases a large amount of heat and ions, the extinction of the arc requires rapidly reducing the temperature of the arc. Subsequently, before the high-temperature arc enters the arc extinguishing grid 15, the high-temperature energy of the arc will first concentrate near the arc path. Since the outer wall of the base 13 is threadedly connected with a gas-producing part 21, and the gas-producing part 21 is in a bent shape which can effectively increase the air flow speed and enhance the pressure of the gas flow, the bent surface changes the direction of the gas flow, and the generated pressure and air flow speed quickly carry away the heat released by the arc. Thus, the gas-producing part 21 helps to carry away and diffuse these heats by guiding the rapid flow of the gas, thereby preventing excessive heat from concentrating in the arc generation area, reducing the arc temperature. Furthermore, the gas flow of the gas-producing part 21 initially cools the high-temperature gas generated by the arc, reducing the gas temperature and the degree of gas ionization, further suppressing the intensity of the arc. In addition, the protection plate 22 threadedly connected to the outer wall of the upper end of the gas-producing part 21 prevents the arc from directly impacting the main body of the gas-producing part 21 in a high-voltage environment; Steps of the back anti-breakdown unit for preventing the arc from reversely breaking down other electrical components in the high-voltage arc extinguishing chamber 12: As Figures 3 to 4As shown, since the gas first flows into the area of the gas generating part 21, through the curved surface and the accelerated air flow, the gas temperature is initially reduced. Subsequently, the gas flows into the arc extinguishing grid 15, and after part of the energy of the arc is consumed, the gas will continue to flow after being cooled by the gas generating part 21. Since there are multiple protruding parts arranged vertically at intervals in two columns along the horizontal direction on the side of the anti-penetration plate 31 facing the arc extinguishing grid 15, and the multiple protruding parts in the two columns are arranged staggeredly, the adjacent two protruding parts belonging to the two columns are clamped and matched with the arc extinguishing grid 15. And the anti-penetration plate 31 is designed as a flat plate with a certain thickness and structural strength, and the outer wall presents an uneven shape, thus playing the role of a thermal barrier during the arc extinguishing process. At the same time, because it is arranged behind the arc extinguishing grid 15, it can quickly guide the air flow transmitted from the arc extinguishing grid 15 and further cool the gas. By dispersing the heat of the gas, the gas temperature is reduced, and the impact on the structural components is reduced. In addition, these designs ensure that the gas can flow stably to the next arc extinguishing stage, avoiding gas retention or uneven flow, and the connecting piece 32 at the upper end of the anti-penetration plate 31 can more firmly install the anti-penetration plate 31; The step of the discontinuous deionization unit for providing a large contact area to attract and eliminate free electrons: As Figure 5 shown, after the gas passes through the anti-penetration plate 31, it carries part of the heat and free electrons released during the arc extinguishing process. These gases may contain free electrons and excited atoms. Therefore, a deionization net 41 is installed on one side outer wall of the anti-penetration plate 31, and the gas will flow towards the deionization net 41. In addition, the deionization net 41 uses the metal wire material of the grid and its surface charge characteristics to capture and adsorb free electrons. When the gas passes through the grid, an electric field effect will be generated on the grid surface for free electrons, attracting and accelerating the combination of free electrons with the metal grid surface, thus "eliminating" these electrons. Moreover, when free electrons collide with the surface of the grid material, part of the free electrons may be directly adsorbed and converted into ions. Through this process, electrons no longer exist in the gas, avoiding the possibility of arc reignition. After passing through the deionization net 41 like this, the free electrons in the gas are greatly reduced, the electrical characteristics of the gas tend to be stable, and the arc is thus completely extinguished. In addition, the air dispersing fin 42 is an auxiliary component installed above the deionization net 41, and its main function is to help the gas distribute more evenly when flowing through the deionization net 41. When the gas flows through the air dispersing fin 42, there will be a change in direction, and part of the air flow is guided to different parts of the grid, so that more free electrons have the opportunity to contact the grid surface and be captured. And the air dispersing fin 42 helps the gas cool down during the gas flow process by contacting the air flow. The reduction of the gas temperature helps to reduce the excessive accumulation of heat energy and avoid damage to the equipment caused by high temperature.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An AC high-voltage rotationally symmetrical busbar frame circuit breaker, comprising a circuit breaker body (1) of a rectangular frame structure, wherein an outer wall of one side of the circuit breaker body (1) is provided with a lever (11) for efficiently guiding the contacts of the circuit breaker body (1) to separate, wherein the lever (11) is made of high-strength alloy steel and one end of the lever is bent at an angle, wherein one end of the lever (11) close to the circuit breaker body (1) is electrically connected to an internal contact of the circuit breaker body (1), wherein a plurality of high-voltage arc extinguishing chambers (12) for effectively extinguishing an arc are provided inside one side of the circuit breaker body (1), wherein one end of the high-voltage arc extinguishing chamber (12) is plug-fitted with an internal contact of the circuit breaker body (1) and the high-voltage arc extinguishing chamber (12) is electrically connected to an internal contact of the circuit breaker body (1). The chamber (12) is in a cubic shape, an arc-extinguishing grid (15) for rapidly absorbing and dispersing heat generated by an electric arc is disposed on one side outer wall of the high-voltage arc-extinguishing chamber (12), the arc-extinguishing grid (15) being composed of a plurality of metal grids, an outer wall of the arc-extinguishing grid (15) being provided with a base (13) for supporting the arc-extinguishing grid (15) in a stable position inside a circuit breaker body (1), an outer wall of one side of the base (13) being provided with a bottom plate (14) for rapidly conducting heat from the arc-extinguishing grid (15) and the high-voltage arc-extinguishing chamber (12) and dissipating it to the external environment, a top cover (16) for ensuring that high-temperature substances do not splash out through sealing protection is disposed on the top of the arc-extinguishing grid (15), and the characteristics are: A gas production increasing unit is provided on the outside of one side of the arc extinguishing grid (15), a rear anti-breakdown unit is provided on the inside of one side of the base (13), and an intermittent deionization unit is provided on the side of the arc extinguishing grid (15) close to the base (13); The gas production increasing unit is used to guide the arc and accelerate the gas flow; The rear anti-breakdown unit is used to prevent the electric arc from reversely breaking through other electrical components of the high-voltage arc extinguishing chamber (12); The intermittent deionization unit is used to provide a large contact surface so that the free electrons are attracted and eliminated.

2. The AC high voltage rotationally symmetrical busbar frame circuit breaker according to claim 1, characterized in that: The gas production increasing unit comprises a gas production component (21) and a protection plate (22); The gas generating part (21) is threadedly connected to the base (13) by bolts to form a fastening structure, the gas generating part (21) is in a curved semicircular shape, the gas generating part (21) is made of a high thermal conductivity copper alloy material, and the gas generating part (21) and the top cover (16) are connected by bolts; The protection plate (22) is threadedly connected to the gas producing part (21) via bolts to form a fastening structure; the protection plate (22) is shell-shaped and closely attached to the gas producing part (21); and the gas producing part (21) is made of high-temperature resistant ceramic material.

3. The AC high voltage rotationally symmetrical busbar frame circuit breaker according to claim 1, characterized in that: The rear anti-penetration unit comprises an anti-penetration plate (31) and a connecting piece (32); The side of the anti-penetration plate (31) facing the arc-extinguishing grid (15) is provided with two rows of multiple protrusions arranged at intervals in a horizontal direction, and the multiple protrusions in the two rows are arranged in a staggered manner, and two adjacent protrusions belonging to the two rows are engaged with the arc-extinguishing grid (15), and a heat dissipation port is provided on the anti-penetration plate (31) between two adjacent protrusions in the same row, and the heat dissipation port is located between two adjacent arc-extinguishing grids (15); a transverse baffle parallel to the arc-extinguishing grid (15) is fixedly provided on the outer wall of the anti-penetration plate (31) on the side away from the arc-extinguishing grid (15), and the transverse baffle is arranged close to the top cover (16); a plurality of heat dissipation grooves are provided on the outer wall of the anti-penetration plate (31) on the side away from the arc-extinguishing grid (15), and the plurality of heat dissipation grooves are distributed in two rows, and correspond to and are respectively connected to the two rows of heat dissipation ports, and the plurality of heat dissipation grooves are respectively arranged above and below the transverse baffle; The connecting piece (32) is clamped on the top outer wall of the anti-penetration plate (31), and the connecting piece (32) is threadedly connected to the base (13) via bolts to form a fastening structure.

4. The AC high voltage rotationally symmetrical busbar frame circuit breaker according to claim 3 is characterized in that: The intermittent degassing unit comprises a degassing net (41) and a gas dispersion sheet (42); The wandering elimination net (41) is fixedly connected to the outer wall below the side of the anti-penetration plate (31) away from the arc extinguishing grid (15), the wandering elimination net (41) is rectangular, the wandering elimination net (41) is made of a copper wire mesh metal material, a plurality of evenly distributed holes are provided on the surface of the wandering elimination net (41), the side of the wandering elimination net (41) away from the anti-penetration plate (31) corresponds to the high-voltage arc extinguishing chamber (12), and the initial position of the wandering elimination net (41) is in contact with a plurality of heat dissipation slots provided below the transverse baffle; The air diffuser (42) is fixedly connected to the upper outer wall of the anti-penetration plate (31) on a side away from the arc extinguishing grid (15), the air diffuser (42) is in a honeycomb grid shape, the air diffuser (42) is made of stainless steel, and the initial position of the air diffuser (42) is in contact with a plurality of heat dissipation grooves arranged above the transverse baffle.

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