A kind of deionization assembly and arc extinguishing system

Abstract

The application discloses a kind of ionization elimination assembly and arc extinguishing system, belong to electrical equipment technical field, including flow guide piece, flow guide piece, chamber and first ionization elimination net and second ionization elimination net, flow guide piece is equipped with flow guide hole;Flow guide piece is equipped with gas outlet hole;The arc entry side and arc exit side of chamber are communicated flow guide hole and gas outlet hole respectively, chamber includes at least one first chamber and at least one second chamber, first chamber is gradually reduced from arc entry side to arc exit side section, second chamber is opposite, the sum of the area of the maximum section of first chamber and the maximum section of second chamber is greater than the arc exit side section area of arc extinguishing grid group;First ionization elimination net is set to first chamber, and second ionization elimination net is set to second chamber.The application can obtain the structure that the sum of chamber section area is greater than arc exit side section area, can efficiently eliminate charged particles in arc gas, can effectively reduce exhaust resistance, ensure that arc smoothly enters and quickly extinguishes in arc extinguishing chamber.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and in particular to an anti-ionization component and an arc extinguishing system. Background Technology

[0002] In power systems, circuit breakers, as critical protective devices, bear the important responsibility of rapidly interrupting current in the event of circuit abnormalities, preventing equipment damage and fires. When the circuit breaker contacts break, an electric arc is generated between the moving and stationary contacts due to dielectric breakdown discharge. After the arc enters the grid of the arc-extinguishing chamber, it is extinguished due to the new cathode effect, near-electrode voltage drop, and cooling deionization, which disrupt the arc's self-sustaining combustion conditions. After the arc is extinguished, the arc gas (mainly composed of metal vapor and high-temperature gas containing charged particles) continues to move. Because the arc gas still contains charged particles, these particles can easily cause the arc to reignite inside and outside the arc-extinguishing chamber, leading to circuit breaker failure.

[0003] To address the issue of residual charged particles in arc gas, existing technologies widely employ deionization components, particularly multi-layered metal mesh structures. These components aim to increase the contact area between the arc gas and the metal mesh, utilizing the high heat capacity of the mesh to absorb heat from the arc gas and promote the neutralization and adsorption of charged particles, thereby improving deionization efficiency. This design, to some extent, enhances the breaking reliability of circuit breakers.

[0004] However, with the increasing demands on circuit breaker performance from power systems, the design limitations of existing anti-ionization components are becoming increasingly apparent. Firstly, while the stacking of multiple layers of metal mesh increases the contact area and heat capacity, it also significantly increases exhaust resistance. At the moment of rapid circuit breaker disconnection, the movement of the arc towards the arc-extinguishing chamber is hindered, potentially preventing the arc from entering the chamber for effective cooling and extinguishing in time, thus increasing the risk of disconnection failure. Secondly, if the high-pressure gas generated during arcing cannot be effectively discharged in time, it will accumulate in the arc-extinguishing chamber, forming a huge impact force. This not only affects the mechanical structural stability of the circuit breaker but, in severe cases, may even cause the circuit breaker casing to rupture, leading to a safety accident.

[0005] Therefore, how to provide an innovative solution to overcome the shortcomings of existing technologies and improve the breaking performance and safety reliability of circuit breakers is an urgent technical problem to be solved. Summary of the Invention

[0006] The purpose of this invention is to provide an anti-ionization component and an arc extinguishing system to solve the problems existing in the prior art. By setting up a first chamber and a second chamber, a structure can be obtained in which the sum of the cross-sectional areas of the chambers is greater than the cross-sectional area of ​​the arc outlet side. This can not only efficiently eliminate charged particles in the arc gas, but also effectively reduce exhaust resistance, ensuring that the arc can smoothly enter and be quickly extinguished in the arc extinguishing chamber.

[0007] To achieve the above objectives, the present invention provides the following solution:

[0008] This invention provides an anti-free ionization component, including a flow guide, a flow guide, a chamber, and a first anti-free ionization net and a second anti-free ionization net. The flow guide has a flow guide hole; the flow guide has an air outlet hole; the arc inlet side of the chamber is connected to the flow guide hole, and the arc outlet side of the chamber is connected to the air outlet hole. The chamber includes at least one first chamber and at least one second chamber. The cross-section of the first chamber gradually decreases from the arc inlet side to the arc outlet side, and the cross-section of the second chamber gradually increases from the arc inlet side to the arc outlet side. The sum of the areas of the maximum cross-section of the first chamber and the maximum cross-section of the second chamber is greater than the cross-sectional area of ​​the arc outlet side of the arc-extinguishing grid assembly. The first anti-free ionization net is disposed in the first chamber, and the second anti-free ionization net is disposed in the second chamber.

[0009] In one embodiment, the system further includes a first drainage slope and a second drainage slope. The first drainage slope is disposed in the second chamber and is used to guide the cross-section of the second chamber to gradually increase. The second drainage slope is disposed in the first chamber and is used to guide the cross-section of the first chamber to gradually decrease.

[0010] In one embodiment, the first de-free net is disposed at or near the maximum cross-sectional position of the first chamber, and the second de-free net is disposed at or near the maximum cross-sectional position of the second chamber.

[0011] In one embodiment, a mesh is provided at the air outlet of the first chamber, and the mesh is a metal anti-free mesh or a perforated insulating plate.

[0012] In one embodiment, the first chamber includes a lower chamber one and a lower chamber two arranged in parallel, the lower chamber one and the lower chamber two being opened in the guide member; the second chamber includes an upper chamber one and an upper chamber two arranged in parallel, the upper chamber one and the upper chamber two being opened in the drainage member.

[0013] In one embodiment, the system further includes a lower arc-splitting partition plate one, a lower arc-splitting partition plate two, an upper arc-splitting partition plate one, and an upper arc-splitting partition plate two. Each of the lower arc-splitting partition plates one, two, one upper arc-splitting partition plate one, and two upper arc-splitting partition plates two is provided with an exhaust hole. An air-blocking arc-splitting structure is formed between the exhaust holes, and the air-blocking arc-splitting structure is correspondingly disposed on the arc-exit side of the guide hole. The lower arc-splitting partition plate one is disposed within the lower chamber one and is located between the first de-free net and the guide hole. The lower arc-splitting partition plate two is disposed within the lower chamber two and is located between the first de-free net and the guide hole. The upper arc-splitting partition plate one is disposed within the upper chamber one and is located between the second de-free net and the guide hole. The upper arc-splitting partition plate two is disposed within the upper chamber two and is located between the second de-free net and the guide hole.

[0014] The present invention also provides an arc extinguishing system, including an arc extinguishing grid assembly, a moving arc-initiating grid, and a deionization component as described above. The arc extinguishing grid assembly includes arc extinguishing grids spaced apart in the thickness direction, and there are arc extinguishing grid gaps between the arc extinguishing grids. The moving arc-initiating grid is located outside the outermost arc extinguishing grid of the arc extinguishing grid assembly. The arc inlet side of the flow guide hole communicates with the arc extinguishing grid gap.

[0015] In one embodiment, the flow guide hole corresponds one-to-one with the gap of the arc extinguishing grid plate. The flow guide hole extends a certain length from the end of the arc extinguishing grid plate towards the arc outlet side and is arranged in an alternating left-right interval. The flow guide member is provided with a groove structure on the side facing the arc extinguishing grid plate group. The groove structure is used for the insertion of the arc extinguishing grid plate and the moving arc ignition grid plate.

[0016] In one embodiment, the arc-extinguishing grid is provided with an arc-initiating notch, the arc-initiating notch is connected to a V-shaped opening, the V-shaped opening includes a long side and a short side, adjacent arc-extinguishing grids are arranged in a mirror image, and the orientation of the arc-initiating notch corresponds to the flow guide hole.

[0017] In one embodiment, the device further includes a first baffle, a second baffle, and an arc-isolating wall. The arc-isolating wall is connected to both sides of the arc-extinguishing grid assembly. The first baffle and the second baffle are located on both sides of the arc inlet of the arc-extinguishing grid assembly. The first baffle and the second baffle are respectively attached to the arc-isolating walls on both sides. The first baffle and the second baffle are made of an insulating arc-resistant gas-generating composite material.

[0018] The present invention achieves the following technical effects compared to the prior art:

[0019] By setting up a first chamber and a second chamber, this invention achieves a structure where the sum of the cross-sectional areas of the chambers is greater than the cross-sectional area of ​​the arc outlet side. This reduces the resistance to gas discharge from the arc outlet, promotes arc movement, reduces the obstruction of the ionization network on the gas blowing effect, and prevents damage to the circuit breaker housing due to excessive internal pressure. Thus, this invention can efficiently eliminate charged particles in the arc gas and effectively reduce exhaust resistance, ensuring that the arc smoothly enters and is quickly extinguished in the arc extinguishing chamber.

[0020] Other technical solutions included in this invention can also achieve the following technical effects:

[0021] The present invention provides a first anti-ionization net and a second anti-ionization net in the first chamber and the second chamber, respectively. Without changing the overall size of the arc extinguishing system, it can increase the overall layout area of ​​the anti-ionization net, increase the overall heat capacity of the anti-ionization net, increase the contact area between the arc gas at the arc outlet of the arc extinguishing chamber and the anti-ionization net, and improve the anti-ionization effect of the anti-ionization net. This improves the arc extinguishing capability and exhaust capability of the arc extinguishing system, enhances the breaking performance of the circuit breaker, shortens the arcing distance of the circuit breaker, and improves the breaking reliability. Attached Figure Description

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is an exploded view of the arc-extinguishing system in an embodiment of the present invention;

[0024] Figure 2a This is a front view of the arc extinguishing system in an embodiment of the present invention;

[0025] Figure 2b This is a side view of the arc extinguishing system in an embodiment of the present invention;

[0026] Figure 2c This is a rear view of the arc extinguishing system in an embodiment of the present invention;

[0027] Figure 3 for Figure 2c Sectional view of AA;

[0028] Figure 4 for Figure 2c BB section view;

[0029] Figure 5 This is a schematic diagram of the arc and airflow movement directions in the arc extinguishing system of this invention.

[0030] Figure 6 for Figure 2b CC section view;

[0031] Figure 7 for Figure 2b DD section view;

[0032] Figure 8 This is an exploded view of the arc-extinguishing system's arc inlet orientation in an embodiment of the present invention;

[0033] Figure 9 This is a schematic diagram of the upper chamber structure of the arc extinguishing system in an embodiment of the present invention;

[0034] Figure 10 Isometric view of the arc extinguishing system in this embodiment of the invention Figure 1 ;

[0035] Figure 11 This is the second isometric view of the arc extinguishing system in an embodiment of the present invention;

[0036] Figure 12 This is a schematic diagram of the installation of the upper arc-shaped partition in an embodiment of the present invention;

[0037] Figure 13 This is a schematic diagram of the installation of the lower arc-shaped partition in an embodiment of the present invention;

[0038] Figure 14 This is a schematic diagram of the two-part structure of the lower chamber in an embodiment of the present invention;

[0039] Figure 15 This is a partial cross-sectional schematic diagram of the flow guide in an embodiment of the present invention;

[0040] Figure 16 This is a schematic diagram of the arc-quenching grid arrangement in an embodiment of the present invention;

[0041] Figure 17 This is an isometric sectional view of the arc extinguishing system in an embodiment of the present invention.

[0042] The components are as follows: 1. Baffle 1; 2. Baffle 2; 3. Moving arc-initiating grid plate; 4. Arc-isolating wall; 5. Arc-extinguishing grid plate assembly; 6. Flow guide; 7. Flow guide hole; 8. Lower chamber 1; 9. Lower chamber 2; 10. Lower arc-splitting partition 1; 11. Lower arc-splitting partition 2; 12. Exhaust hole; 13. Support rod; 14. First anti-free net; 15. Flow guide; 16. Upper chamber 1; 17. Upper chamber 2; 18. Upper arc-splitting partition 1; 19. Upper arc-splitting partition 2; 20. Flow guide slope 1; 21. Air outlet; 22. Partition net; 23. Support; 24. Cover plate; 25. Flow guide slope 2; 26. Air inlet; 27. Long side; 28. Short side; 29. ​​Groove structure; 30. Second anti-free net; 31. Air-blocking arc-splitting structure; 32. Arc-initiating notch; 33. Iron core. Detailed Implementation

[0043] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0044] The purpose of this invention is to provide an anti-ionization component and an arc extinguishing system to solve the problems existing in the prior art. By setting up a first chamber and a second chamber, a structure can be obtained in which the sum of the cross-sectional areas of the chambers is greater than the cross-sectional area of ​​the arc outlet side. This can not only efficiently eliminate charged particles in the arc gas, but also effectively reduce exhaust resistance, ensuring that the arc can smoothly enter and be quickly extinguished in the arc extinguishing chamber.

[0045] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] like Figures 1 to 17 As shown, this invention provides an anti-ionization component, including a flow guide 6, a flow guide 15, a chamber, and a first anti-ionization mesh 14 and a second anti-ionization mesh 30. The flow guide 6 has flow guide holes 7, the inlet side of which connects to the gaps between the arc-extinguishing grid plates in the arc-extinguishing grid plate assembly 5, guiding the generated arc gas to the outlet side. Multiple flow guide holes 7 are provided according to the cross-sectional size of the outlet side of the arc-extinguishing grid plate assembly 5. The flow guide 15 has an outlet hole 21 for discharging the anti-ionized arc gas. The inlet side of the chamber connects to the flow guide holes 7, and the outlet side of the chamber connects to the outlet hole 21. The arc gas enters the outlet hole 21 through the flow guide holes 7 and is finally discharged through the outlet hole 21. The chamber includes at least one first chamber and at least one second chamber, which can be distributed vertically or horizontally. It should be noted that the up, down, left, and right directions mentioned in this article are determined based on the orientation from the side of the arc outlet towards the anti-freezing component (e.g., Figure 2c (As shown, the orientation can be directly determined). The cross-sectional area of ​​the first chamber gradually decreases from the arc inlet side to the arc outlet side, while the cross-sectional area of ​​the second chamber gradually increases from the arc inlet side to the arc outlet side. The sum of the areas of the maximum cross-sections of the first and second chambers is greater than the arc outlet side cross-sectional area of ​​the arc-extinguishing grid assembly 5. The first de-ionizing mesh 14 is disposed in the first chamber, and the number of the first de-ionizing mesh 14 corresponds one-to-one with the number of the first chambers. The second de-ionizing mesh 30 is disposed in the second chamber, and the number of the second de-ionizing mesh 30 corresponds one-to-one with the number of the second chambers.

[0047] By setting up a first chamber and a second chamber, this invention achieves a structure where the sum of the cross-sectional areas of the chambers is greater than the cross-sectional area of ​​the arc outlet side. This reduces the resistance to gas discharge from the arc outlet, promotes arc movement, reduces the obstruction of the ionization network on the gas blowing effect, and prevents damage to the circuit breaker housing due to excessive internal pressure. Thus, this invention can efficiently eliminate charged particles in the arc gas and effectively reduce exhaust resistance, ensuring that the arc smoothly enters and is quickly extinguished in the arc extinguishing chamber.

[0048] In one embodiment, the system further includes a first drainage slope 20 and a second drainage slope 25. The first drainage slope 20 is disposed in the second chamber and guides the cross-section of the second chamber to gradually increase. Each second chamber has a separate first drainage slope 20. The second drainage slope 25 is disposed in the first chamber and guides the cross-section of the first chamber to gradually decrease. Each first chamber has a separate second drainage slope 25. The first drainage slope 20 and the second drainage slope 25 may be two opposite sides of the same structure.

[0049] like Figure 3 , Figure 4 and Figure 13 As shown, the lower chamber 8 and the lower chamber 9, under the action of the drainage inclined surface 25 in their respective chambers, have a chamber cross-section that gradually decreases in the direction perpendicular to the connecting line from the inlet side to the outlet side, with the smallest cross-section at the end being the air outlet 21.

[0050] like Figure 3 , Figure 4 and Figure 12 As shown, the upper chamber 16 and upper chamber 27, under the action of the drainage inclined surface 20 in their respective chambers, have a chamber cross-section that gradually increases in the direction perpendicular to the connecting line from the inlet side to the outlet side, with the smallest cross-section being the air inlet 26, which is arranged in close contact with the end plane of the guide hole 7 on the upper part of the guide member 6.

[0051] The stacked arrangement of multiple chambers effectively increases the exhaust space on the arc exit side of the guide hole 7. Simultaneously, due to the effect of the second guide slope 25, the resistance to airflow reversal is reduced, significantly decreasing the resistance as the airflow and electric arc move through the decreasing spaces of the lower chambers 8 and 9. Due to the effect of the first guide slope 20, the space towards the arc exit side of the upper chambers 16 and 17 rapidly increases, significantly reducing the resistance to the airflow and electric arc moving towards the arc exit side.

[0052] In one embodiment, the first deionization net 14 is disposed at or near the maximum cross-sectional position of the first chamber, and the second deionization net 30 is disposed at or near the maximum cross-sectional position of the second chamber. Through this arrangement, without changing the overall dimensions of the arc extinguishing system, the overall area of ​​the deionization net can be increased, the overall heat capacity of the deionization net can be increased, the contact area between the arc gas at the arc outlet of the arc extinguishing chamber and the deionization net can be increased, and the deionization effect of the deionization net can be improved. This enhances the arc extinguishing capability and exhaust capability of the arc extinguishing system, improves the breaking performance of the circuit breaker, shortens the arcing distance of the circuit breaker, and improves breaking reliability.

[0053] like Figure 3 , Figure 4 and Figure 13 As shown, the lower arc-splitting partition 10, the lower arc-splitting partition 11, and the first anti-free net 14 are respectively arranged at the larger chamber cross-section of the lower chamber 18 and the lower chamber 29, that is, on the arc inlet side of the chamber.

[0054] like Figure 3 , Figure 4 and Figure 12 As shown, the upper arc-splitting partition 18, the upper arc-splitting partition 2 19, and the second anti-free net 30 are respectively arranged at the larger chamber cross-section of the upper chamber 16 and the upper chamber 2 17, that is, the arc-out side of the chamber.

[0055] In one implementation, such as Figure 2a , Figure 2b , Figure 2c , Figure 3 and Figure 4 As shown, a partition 22 is provided at the air outlet 21 position of the first chamber. The partition 22 is made of metal deionization mesh or perforated insulating plate. When metal deionization mesh is used, the arc gas passing through the first chamber is deionized again and external debris is blocked, which increases the contact area with the deionization mesh and further improves the arc extinguishing effect, and can also block external debris. When perforated insulating plate is used, it can also block external debris.

[0056] In one embodiment, the first de-freezing net 14 can be omitted to reduce costs. In this case, the cross-section of the air outlet 21 of the first chamber can be reduced, and the de-freezing effect of the first de-freezing net 14 can be replaced by the partition net 22, which can also produce considerable technical effects.

[0057] like Figures 1-4As shown, a cover plate 24 is also provided on the arc outlet side of the guide member 15. The second deionization net 30 and the partition net 22 are both located between the guide member 15 and the cover plate 24. The square hole structure of the cover plate 24 is respectively provided with the second deionization net 30 and the partition net 22. A bracket 23 is provided between the second deionization net 30 and the cover plate 24. The bracket 23 has a certain thickness to maintain a certain distance between the second deionization net 30 and the cover plate 24. This can constrain the movement path of the gas discharged from the second deionization net 30 and prevent charged particles accidentally discharged from different chambers from re-contacting and causing short circuit breakdown.

[0058] In one embodiment, the first chamber can be formed on the guide member 6, on the drainage member 15, or be an independently configured chamber structure. Similarly, the second chamber can be formed on the guide member 6, on the drainage member 15, or be an independently configured chamber structure. In this embodiment, the first chamber includes a lower chamber 1 8 and a lower chamber 2 9 arranged side by side, which are formed on the guide member 6. The second chamber includes an upper chamber 1 16 and an upper chamber 2 17 arranged side by side, which are formed on the drainage member 15.

[0059] In one embodiment, lower chamber 1 8 and lower chamber 2 9 can be combined into one chamber, meaning only one first chamber is provided, reducing the partition between lower chamber 1 8 and lower chamber 2 9 to obtain a larger space to accommodate the second de-free net 30. Upper chamber 1 16 and upper chamber 2 17 can also be combined into one chamber, meaning only one second chamber is provided, reducing the partition between upper chamber 1 16 and upper chamber 2 17 to obtain a larger space to accommodate the first de-free net 14.

[0060] like Figure 3 , Figure 4 , Figure 8 and Figure 14 As shown, the space on the lower left side of the guide member 6, in conjunction with the drainage member 15, forms the lower chamber 8. The space on the lower right side of the guide member 6, in conjunction with the drainage member 15, forms the lower chamber 9.

[0061] like Figure 3 , Figure 4 , Figure 9 As shown, the upper left space of the drainage component 15, in conjunction with the cover plate 24, forms the upper chamber 16. The upper right space of the drainage component 15, in conjunction with the cover plate 24, forms the upper chamber 27.

[0062] Lower chamber 1 (8), lower chamber 2 (9), upper chamber 1 (16), and upper chamber 2 (17) are electrically isolated from each other. When the electric arc is discharged through the guide hole 7 of the guide member 6, it enters each chamber and is ionized again.

[0063] In one embodiment, the system further includes a lower arc-splitting partition 10, a lower arc-splitting partition 11, an upper arc-splitting partition 18, and an upper arc-splitting partition 19. Each of these partitions has an exhaust port 12, and a baffle arc-splitting structure 31 is formed between the exhaust ports 12. The baffle arc-splitting structure 31 is correspondingly positioned on the arc-exit side of the guide hole 7. The lower arc-splitting partition 10 is located within the lower chamber 8 and between the first anti-free net 14 and the guide hole 7. The lower arc-splitting partition 11 is located within the lower chamber 9 and between the first anti-free net 14 and the guide hole 7. The upper arc-splitting partition 18 is located within the upper chamber 16 and between the second anti-free net 30 and the guide hole 7. The upper arc partition plate 19 is disposed in the upper chamber 17 and is located between the second de-free net 30 and the guide hole 7.

[0064] like Figure 3 , Figure 4 and Figure 17 As shown, the lower arc-splitting baffle 10, lower arc-splitting baffle 2 11, upper arc-splitting baffle 18, and upper arc-splitting baffle 2 19 are arranged at certain intervals from the end plane of the guide hole 7 in their respective chambers, with an interval range of 2mm to 8mm. The exhaust hole 12 has an elongated hole structure, that is, an elongated air-blocking arc-splitting structure 31 is formed between the exhaust holes 12, and the air-blocking arc-splitting structure 31 is set one-to-one with the arc-exit side of the guide hole 7. In some simplified embodiments, each arc-splitting baffle can be a perforated structure plate without a specific shape, and its arc-splitting effect is slightly worse. The arc-exit sides of the lower arc-splitting baffle 10 and lower arc-splitting baffle 2 11 are respectively arranged with a first anti-free net 14 at intervals, with an interval range of 2mm to 8mm. The arc-exit sides of the upper arc-splitting baffle 18 and upper arc-splitting baffle 2 19 are respectively arranged with a second anti-free net 30 at intervals, with an interval range of 2mm to 8mm. Each arc partition and its corresponding anti-free net can be supported by a support rod 13 with the same diameter and spacing.

[0065] When the residual electric arc is discharged from the guide holes 7 of the guide member 6, its movement path is disrupted by the blocking effect of the air-blocking and arc-splitting structure 31, and it is discharged from the exhaust hole 12. The air-blocking and arc-splitting structure 31 can prevent the electric arc from directly spraying into each of the anti-free ionization nets and prevent the high temperature of the electric arc from melting the anti-free ionization nets, thereby reducing the air permeability and anti-free ionization effect of the anti-free ionization nets.

[0066] Simultaneously, the electric arcs initially entering the upper chamber 16 and upper chamber 27 are dispersed by the gas-blocking arc-splitting structure 31. After passing through the exhaust port 12, they gradually diffuse into the entire chamber under the action of the flow-guiding inclined surface 20, making full contact with the second deionization net 30 and being deionized. The residual gas is discharged through the cover plate 24. Similarly, the electric arcs initially entering the lower chamber 8 and lower chamber 29 are dispersed by the gas-blocking arc-splitting structure 31, making full contact with the first deionization net 14 and being deionized. The residual gas is discharged through the exhaust port 21 under the constraint of the flow-guiding inclined surface 25. The gap between the guide hole 7 and each arc-splitting baffle reduces the resistance of each baffle to the electric arc and airflow, making it easier for the electric arc and airflow to be dispersed by the gas-blocking arc-splitting structure 31. The gap between each arc-splitting baffle and each anti-free ionization net allows the electric arc dispersed by the blocked arc-splitting structure 31 to fully diffuse to the surface of the anti-free ionization net, making full contact with each anti-free ionization net and improving the utilization rate of each anti-free ionization net.

[0067] Since the projections of the first de-free net 14 and the second de-free net 30 on the vertical plane overlap at least partially, the sum of the cross-sectional areas of the first de-free net 14 and the second de-free net 30 is greater than the cross-sectional area of ​​the arc outlet of the arc extinguishing chamber, which fully enhances the capacity of the de-free net and does not require increasing the volume of the arc extinguishing system. At the same time, it reduces the exhaust resistance and makes full use of the air blowing effect.

[0068] like Figures 1 to 17 As shown, the present invention also provides an arc extinguishing system, including an arc extinguishing grid assembly 5, a moving arc-initiating grid 3, and an anti-ionization component as described above. The arc extinguishing grid assembly 5 includes arc extinguishing grids spaced apart in the thickness direction, with gaps between the arc extinguishing grids. The moving arc-initiating grid 3 is located outside the outermost arc extinguishing grid of the arc extinguishing grid assembly 5, i.e., at the upper or lower part of the arc extinguishing grid assembly 5. The inlet side of the guide hole 7 communicates with the gaps between the arc extinguishing grids.

[0069] like Figure 1 , Figure 2a , Figure 2b , Figure 2c , Figure 8 , Figure 10 and Figure 11 As shown, the arc-extinguishing system includes an arc-extinguishing chamber and its auxiliary structures. The arc-extinguishing system has an arc inlet and an arc outlet, located on the front and rear sides of the arc-extinguishing system, respectively (e.g., ...). Figure 8 (As shown). The moving arc-initiating grid plate 3 is located on the upper part of the arc-extinguishing grid plate group 5, and the end of the moving arc-initiating grid plate 3 on the arc inlet side is a bent arc-initiating structure. The arc-extinguishing grid plate group 5 and the moving arc-initiating grid plate 3 are positioned and supported by the arc-isolating walls 4 on both sides.

[0070] like Figure 3 and Figure 4As shown, an iron core 33 can be added to the bent arc-starting structure at the arc inlet side end of the moving arc-starting grid plate 3 to increase the heat capacity at this location. This prevents the bent arc-starting structure from melting and disappearing due to continuous arc burning, thus avoiding the loss of its arc-starting function.

[0071] like Figure 1 and Figure 8 As shown, the flow guide 15 is attached to the arc outlet side of the flow guide 6, and the cover plate 24 is attached to the arc outlet side of the flow guide 15.

[0072] In one embodiment, the guide hole 7 corresponds one-to-one with the gap of the arc-extinguishing grid plate. The guide hole 7 extends a certain length from the end of the arc-extinguishing grid plate to the arc outlet side and is arranged in an alternating left and right interval. The guide member 6 is provided with a groove structure 29 on the side facing the arc-extinguishing grid plate group 5. The groove structure 29 is used for the insertion of the arc-extinguishing grid plate and the moving arc-initiating grid plate 3.

[0073] like Figure 8 , Figure 15 and Figure 17 As shown, the arc-extinguishing grid assembly 5 and the moving arc-initiating grid 3 are provided with a guide member 6 at the arc-outlet side end. The guide member 6 is made of insulating composite material. The guide member 6 has a guide hole 7, which corresponds one-to-one with the gap between the arc-extinguishing grids. It extends a certain length from the end of the arc-extinguishing grid to the arc-outlet side and is arranged alternately on the left and right. The guide member 6 makes the end of each arc-extinguishing grid form a wrapping structure. The electric arc and high-temperature gas in the gap between two adjacent arc-extinguishing grids can be discharged alternately from the guide hole 7, increasing the electrical clearance for the discharged arc between adjacent arc-extinguishing grids. Since the guide member 6 is made of insulating material, the electric arc moving in the guide hole 7 can be further ionized.

[0074] like Figure 8 As shown, the guide member 6 has a groove structure 29, which is inserted and fitted into the arc-extinguishing grid assembly 5 and the moving arc-inducing grid 3. Each arc-extinguishing grid is inserted into the groove structure 29. The groove structure 29 can improve the airtightness of the exhaust from the gap between the arc-extinguishing grids, preventing the arc from escaping from other directions and causing the arc to short-circuit and break down again at the arc exit end of the arc-extinguishing grid.

[0075] In one embodiment, the arc-extinguishing grid is provided with an arc-initiating notch 32, which is connected to a V-shaped opening. The V-shaped opening includes a long side 27 and a short side 28. Adjacent arc-extinguishing grids are arranged in a mirror image, and the orientation of the arc-initiating notch 32 corresponds to the flow guide hole 7.

[0076] like Figure 6 and Figure 7As shown, the arc-extinguishing grid assembly 5 consists of arc-extinguishing grids arranged alternately in a mirror image. Each arc-extinguishing grid has an asymmetrically arranged arc-initiating notch 32, the orientation of which is consistent with the direction of its corresponding guide hole 7. The arc-initiating notch 32 facilitates the deflection of the arc's movement path and allows it to move towards the corresponding guide hole 7, reducing arc deflection resistance and facilitating the arc's movement towards the arc exit side of the arc-extinguishing system.

[0077] like Figure 6 , Figure 7 and Figure 16 As shown, the arc-extinguishing grid plate group 5 has an asymmetrical structure on both sides of the arc-extinguishing grid plate inlet (i.e., V-shaped opening), namely the long side 27 and the short side 28. After the adjacent arc-extinguishing grid plates are arranged in mirror image, the long side 27 and the short side 28 of the arc-extinguishing grid plates on the same side are arranged alternately. When the arc initially enters the arc-extinguishing system at the inlet side, it first contacts the long side 27 of the arc-extinguishing grid plate. The large distance between the two adjacent long side 27 arc-extinguishing grid plates can reduce the resistance of the arc moving towards the outlet side. Then the arc contacts the short side 28 arc-extinguishing grid plate, realizing the simultaneous cutting of the arc by each arc-extinguishing grid plate.

[0078] In one embodiment, the system also includes a first baffle 1, a second baffle 2, and an arc-isolating wall 4. The arc-isolating wall 4 is connected to the left and right sides of the arc-extinguishing grid assembly 5. The first baffle 1 and the second baffle 2 are located on both sides of the arc inlet of the arc-extinguishing grid assembly 5. The first baffle 1 and the second baffle 2 shield the arc-extinguishing grid on both sides and are respectively attached to the arc-isolating walls 4 on both sides. The first baffle 1 and the second baffle 2 are made of insulating arc-resistant gas-generating composite material. When an electric arc is generated at the arc inlet, the insulating arc-resistant gas-generating composite material can decompose under the action of the high-temperature electric arc to generate particle vapor, which pushes the electric arc toward the arc outlet of the arc-extinguishing system and causes the electric arc to cool down, producing a gas blowing effect.

[0079] The working principle of this invention is as follows:

[0080] like Figure 6 and Figure 7 As shown, when an electric arc is generated at the arc inlet of the arc extinguishing system, the baffles 1 and 2 decompose under the action of the high-temperature electric arc, producing particle vapor, which generates a blowing effect, propelling the electric arc towards the arc outlet of the arc extinguishing system and causing the electric arc to cool down. Under the combined action of the arc ignition notches 32 and the guide holes 7 of each arc extinguishing grid, the electric arc deflects in different directions in the gap between adjacent arc extinguishing grids.

[0081] like Figure 5 and Figure 17As shown, after the electric arc is extinguished by the arc-extinguishing grid assembly 5, the arc gas in the upper part enters the upper chamber 16 and the upper chamber 27 respectively through the guide hole 7 and the air inlet 26 of the guide member 15. The airflow and residual arc are dispersed by the air-blocking and arc-splitting structure 31 of the upper arc-splitting partition 18 and the upper arc-splitting partition 29, and discharged from each exhaust hole 12. Under the action of the guide slope 20, it diffuses to the entire chamber (upper chamber 16 and upper chamber 2 17). The arc gas comes into full and large-area contact with the second deionization net 30 and is deionized. After the high-temperature gas passes through the cover plate 24, it is discharged from the arc-extinguishing system.

[0082] The arc gas in the lower part is dispersed through the guide hole 7 under the action of the gas blocking and arc splitting structure 31 of the lower arc splitting partition 10 and the lower arc splitting partition 21, and diffuses into the entire chamber (lower chamber 18 and lower chamber 29). The arc gas is in full and large-area contact with the first deionization net 14 and is deionized. The high-temperature gas is guided by the second guide slope 25 and discharged from the arc extinguishing system through the outlet hole 21.

[0083] After the arc is extinguished by the arc-extinguishing grid assembly 5, it enters multiple isolated chambers (lower chamber 1 8, lower chamber 2 9, upper chamber 1 16, and upper chamber 2 17), and is further extinguished by multiple sets of large-capacity anti-ionization nets (first anti-ionization net 14, second anti-ionization net 30, and partition net 22). By setting multiple sets of anti-ionization nets, the heat capacity of the anti-ionization nets is significantly increased without affecting the overall volume of the arc-extinguishing system, increasing the effective contact area between the residual arc and the anti-ionization nets, and improving the anti-ionization capability. At the same time, the design of multiple guiding slopes (guiding slope 1 20 and guiding slope 2 25) guides the arc and airflow path while reducing the exhaust resistance of the arc-extinguishing system, allowing the arc to pass through the arc-extinguishing system quickly and be extinguished under the action of air blowing, reducing the impact of high-voltage gas on the circuit breaker casing, and improving the breaking performance and safety of the circuit breaker.

[0084] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A component for eliminating free radicals, characterized in that, include: The flow guide is provided with flow guide holes; A drainage component, wherein the drainage component is provided with an air outlet; The chamber has an inlet side connected to the guide hole and an outlet side connected to the air outlet. The chamber includes at least one first chamber and at least one second chamber. The cross-section of the first chamber gradually decreases from the inlet side to the outlet side, and the cross-section of the second chamber gradually increases from the inlet side to the outlet side. The sum of the areas of the maximum cross-section of the first chamber and the maximum cross-section of the second chamber is greater than the area of ​​the outlet side cross-section of the arc-extinguishing grid assembly. And a first de-free net and a second de-free net, wherein the first de-free net is disposed in the first chamber and the second de-free net is disposed in the second chamber.

2. The deionization component according to claim 1, characterized in that: It also includes a first drainage slope and a second drainage slope. The first drainage slope is disposed in the second chamber and is used to guide the cross-section of the second chamber to gradually increase. The second drainage slope is disposed in the first chamber and is used to guide the cross-section of the first chamber to gradually decrease.

3. The deionization component according to claim 1, characterized in that: The first de-free net is disposed at or near the maximum cross-sectional position of the first chamber, and the second de-free net is disposed at or near the maximum cross-sectional position of the second chamber.

4. The deionization component according to claim 3, characterized in that: A mesh is provided at the air outlet of the first chamber. The mesh is made of metal non-detachable mesh or perforated insulating board.

5. The deionization component according to claim 3, characterized in that: The first chamber includes a lower chamber one and a lower chamber two arranged in parallel, the lower chamber one and the lower chamber two being opened in the guide member; the second chamber includes an upper chamber one and an upper chamber two arranged in parallel, the upper chamber one and the upper chamber two being opened in the drainage member.

6. The deionization component according to claim 5, characterized in that: It also includes a lower arc-splitting partition plate one, a lower arc-splitting partition plate two, an upper arc-splitting partition plate one, and an upper arc-splitting partition plate two. Each of the lower arc-splitting partition plate one, the lower arc-splitting partition plate two, the upper arc-splitting partition plate one, and the upper arc-splitting partition plate two is provided with an exhaust hole. An air-blocking arc-splitting structure is formed between the exhaust holes. The air-blocking arc-splitting structure is correspondingly arranged on the arc-out side of the guide hole. The lower arc-splitting partition plate one is disposed in the lower chamber one and is located between the first de-free net and the guide hole. The lower arc-splitting partition plate two is disposed in the lower chamber two and is located between the first de-free net and the guide hole. The upper arc-splitting partition plate one is disposed in the upper chamber one and is located between the second de-free net and the guide hole. The upper arc-splitting partition plate two is disposed in the upper chamber two and is located between the second de-free net and the guide hole.

7. An arc-extinguishing system, characterized in that, include: An arc-extinguishing grid assembly, comprising arc-extinguishing grids spaced apart in the thickness direction, with gaps between the arc-extinguishing grids; A movable arc-initiating grid, wherein the movable arc-initiating grid is located outside the outermost arc-extinguishing grid of the arc-extinguishing grid group; And the deionization component as described in any one of claims 1-6, wherein the inlet side of the flow guide hole is connected to the gap of the arc-extinguishing grid.

8. The arc-extinguishing system according to claim 7, characterized in that: The flow guide holes correspond one-to-one with the gaps of the arc extinguishing grid plates. The flow guide holes extend a certain length from the end of the arc extinguishing grid plate towards the arc outlet side and are arranged alternately on the left and right. The flow guide member has a groove structure on the side facing the arc extinguishing grid plate group. The groove structure is used for the insertion of the arc extinguishing grid plate and the moving arc ignition grid plate.

9. The arc-extinguishing system according to claim 8, characterized in that: The arc-extinguishing grid is provided with an arc-initiating notch, which is connected to a V-shaped opening. The V-shaped opening includes a long side and a short side. Adjacent arc-extinguishing grids are arranged in a mirror image, and the orientation of the arc-initiating notch corresponds to the flow guide hole.

10. The arc-extinguishing system according to claim 7, characterized in that: It also includes a first baffle, a second baffle, and an arc-isolating wall. The arc-isolating wall is connected to both sides of the arc-extinguishing grid assembly. The first baffle and the second baffle are located on both sides of the arc inlet of the arc-extinguishing grid assembly. The first baffle and the second baffle are respectively attached to the arc-isolating walls on both sides. The first baffle and the second baffle are made of insulating arc-resistant gas-generating composite material.

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