Deionization assembly and arc extinguishing system

Abstract

The invention discloses a deionization assembly and an arc extinguishing system, and belongs to the technical field of electrical equipment, the deionization assembly comprises a flow guide part, a drainage part, a cavity, a first deionization net and a second deionization net, and the flow guide part is provided with a flow guide hole; an air outlet is formed in the drainage piece; the arc inlet side and the arc outlet side of the cavity are communicated with the flow guide hole and the air outlet hole respectively, the cavity comprises at least one first cavity and at least one second cavity, the section of the first cavity is gradually reduced from the arc inlet side to the arc outlet side, and the second cavity is opposite to the first cavity; the sum of the area of the maximum cross section of the first chamber and the area of the maximum cross section of the second chamber is larger than the cross section area of the arc outlet side of the arc extinguishing grid sheet group. The first deionization net is arranged in the first cavity, and the second deionization net is arranged in the second cavity. According to the invention, the structure that the sum of the cross-sectional areas of the chambers is greater than the cross-sectional area of the arc outlet side can be obtained, charged particles in arc gas can be efficiently eliminated, the exhaust resistance can be effectively reduced, and the arc can smoothly enter the arc extinguish chamber and be quickly extinguished in the arc extinguish chamber.

Description

Technical Field

[0001] The invention relates to the technical field of electrical equipment, and in particular to an arc extinguishing component and an arc extinguishing system. Background Art

[0002] In the power system, the circuit breaker, as a key protection device, bears the important responsibility of quickly cutting off the current when the circuit is abnormal, preventing equipment damage and fire and other safety accidents. When the contacts of the circuit breaker are disconnected, an arc will be generated between the moving and static contacts due to dielectric breakdown discharge. After the arc enters the grid of the arc extinguishing chamber, the self-sustaining arcing conditions of the arc are destroyed due to the new cathode effect, near-pole voltage drop, cooling and deionization, etc., causing it to extinguish. After the arc is extinguished, the arc gas (mainly composed of metal vapor and high-temperature gas with charged particles) will continue to move. Since the arc gas still contains charged particles, these charged particles can easily cause the arc to reignite inside and outside the arc extinguishing chamber, causing the circuit breaker to fail to disconnect.

[0003] In order to deal with the problem of residual charged particles in arc gas, deionization components are widely used in the prior art, especially the structure of stacking multiple layers of metal mesh, which aims to increase the contact area between arc gas and metal mesh, absorb the heat of arc gas by using the high heat capacity of metal mesh, and promote the neutralization and adsorption of charged particles, thereby improving the deionization efficiency. This design improves the disconnection reliability of circuit breakers to a certain extent.

[0004] However, as the power system's requirements for circuit breaker performance continue to increase, the design limitations of existing ion-eliminating components have become increasingly prominent. First, although the stacking of multiple layers of metal mesh increases the contact area and heat capacity, it also significantly increases the exhaust resistance. At the moment when the circuit breaker is quickly disconnected, the movement of the arc to the arc extinguishing chamber is hindered, which may cause the arc to fail to enter the arc extinguishing chamber in time for effective cooling and extinguishing, thereby increasing the risk of breaking failure. Secondly, if the high-pressure gas generated during the arcing process cannot be effectively discharged in a timely manner, it will accumulate in the arc extinguishing chamber, forming a huge impact force, which not only affects the mechanical structural stability of the circuit breaker, but in severe cases may even cause the circuit breaker housing to rupture, causing a safety accident.

[0005] Therefore, how to provide an innovative solution to overcome the deficiencies of the existing technology and improve the breaking performance and safety reliability of the circuit breaker is a technical problem that needs to be solved urgently. Summary of the invention

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

[0007] To achieve the above object, the present invention provides the following solutions:

[0008] The present invention provides an extinguishing deionization component, comprising a flow guide, a flow guide, a chamber, a first extinguishing deionization net and a second extinguishing deionization net, wherein the flow guide is provided with a flow guide hole; the flow guide is provided with an air outlet hole; the arc entrance side of the chamber is connected to the flow guide hole, and the arc exit side of the chamber is connected to the air outlet hole, the chamber comprises at least one first chamber and at least one second chamber, the cross-section of the first chamber gradually decreases from the arc entrance side to the arc exit side, the cross-section of the second chamber gradually increases from the arc entrance side to the arc exit side, the sum of the maximum cross-section of the first chamber and the maximum cross-section of the second chamber is greater than the cross-section area of ​​the arc exit side of the arc extinguishing grid group; the first extinguishing deionization net is arranged in the first chamber, and the second extinguishing deionization net is arranged in the second chamber.

[0009] In one embodiment, it also includes drainage slope 1 and drainage slope 2, wherein drainage slope 1 is arranged in the second chamber, and drainage slope 1 is used to guide the cross-section of the second chamber to gradually increase; drainage slope 2 is arranged in the first chamber, and drainage slope 2 is used to guide the cross-section of the first chamber to gradually decrease.

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

[0011] In one embodiment, a partition is provided at the air outlet of the first chamber, and the partition is a metal ion-eliminating net or a perforated insulating plate.

[0012] In one embodiment, the first chamber includes a lower chamber 1 and a lower chamber 2 arranged in parallel, and the lower chamber 1 and the lower chamber 2 are opened in the guide member, and the second chamber includes an upper chamber 1 and an upper chamber 2 arranged in parallel, and the upper chamber 1 and the upper chamber 2 are opened in the guide member.

[0013] In one embodiment, it also includes a lower arc-dividing baffle plate 1, a lower arc-dividing baffle plate 2, an upper arc-dividing baffle plate 1 and an upper arc-dividing baffle plate 2, wherein the lower arc-dividing baffle plate 1, the lower arc-dividing baffle plate 2, the upper arc-dividing baffle plate 1 and the upper arc-dividing baffle plate 2 are respectively provided with exhaust holes, and an air-blocking arc-dividing structure is formed between the exhaust holes, and the air-blocking arc-dividing structure is correspondingly arranged on the arc outlet side of the guide hole; the lower arc-dividing baffle plate 1 is arranged in the lower chamber 1, and is located between the first free-flowing eliminator net and the guide hole; the lower arc-dividing baffle plate 2 is arranged in the lower chamber 2, and is located between the first free-flowing eliminator net and the guide hole; the upper arc-dividing baffle plate 1 is arranged in the upper chamber 1, and is located between the second free-flowing eliminator net and the guide hole; the upper arc-dividing baffle plate 2 is arranged in the upper chamber 2, and is located between the second free-flowing eliminator net and the guide hole.

[0014] The present invention also provides an arc extinguishing system, comprising an arc extinguishing grid group, a movable arc-striking grid and an anti-ionization assembly as described above, wherein the arc extinguishing grid group comprises arc extinguishing grids spaced apart in the thickness direction, and arc extinguishing grid gaps are provided between the arc extinguishing grids; the movable arc-striking grid is located on the outer side of the outermost arc extinguishing grid of the arc extinguishing grid group; and the arc inlet side of the guide hole is connected to the arc extinguishing grid gap.

[0015] In one embodiment, the guide holes correspond to the gaps between the arc extinguishing grids one by one, the guide holes extend from the end of the arc extinguishing grid to the arc outlet side for a certain length, and are arranged alternately at left and right intervals, and a groove structure is provided on the side of the guide member facing the arc extinguishing grid group, and the groove structure is used for the arc extinguishing grid and the moving arc striking grid to be inserted.

[0016] In one embodiment, the arc extinguishing grid is provided with an arc striking notch, the arc striking notch is connected with 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 direction of the arc striking notch corresponds to the guide hole.

[0017] In one embodiment, it also includes baffle 1, baffle 2 and arc isolation wall, the arc isolation wall is connected to both sides of the arc extinguishing grid group, the baffle 1 and the baffle 2 are located on both sides of the arc entrance of the arc extinguishing grid group, the baffle 1 and the baffle 2 are respectively fitted with the arc isolation walls on both sides, and the baffle 1 and the baffle 2 are made of insulating arc-resistant gas-generating composite material.

[0018] Compared with the prior art, the present invention has achieved the following technical effects:

[0019] The present invention can obtain a structure in which the sum of the cross-sectional areas of the chambers is greater than the cross-sectional area of ​​the arc outlet side by setting the first chamber and the second chamber, which can reduce the resistance of gas discharge from the arc outlet, promote arc movement, reduce the obstruction of the extinguishing network on the gas blowing effect, and prevent the circuit breaker casing from being damaged due to excessive internal pressure of the circuit breaker. Therefore, the present invention can not only efficiently eliminate charged particles in the arc gas, but also effectively reduce the exhaust resistance, ensuring that the arc smoothly enters and is quickly extinguished in the arc extinguishing chamber.

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

[0021] The present invention is provided with a first wandering extinguishing network and a second wandering extinguishing network in the first chamber and the second chamber respectively. Under the premise of not changing the overall size of the arc extinguishing system, the overall layout area of ​​the wandering extinguishing network can be increased, the overall heat capacity of the wandering extinguishing network can be increased, the contact area between the arc gas at the arc outlet of the arc extinguishing chamber and the wandering extinguishing network can be increased, and the wandering extinguishing effect of the wandering extinguishing network can be improved, thereby improving the arc extinguishing capacity and exhaust capacity of the arc extinguishing system, improving the breaking performance of the circuit breaker, shortening the arcing distance of the circuit breaker, and improving the breaking reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 An exploded diagram of the structure of the arc extinguishing system in an embodiment of the present invention;

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

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

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

[0027] Figure 3 for Figure 2c Middle AA section view;

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

[0029] Figure 5 Schematic diagram of the arc and airflow movement direction in the arc extinguishing system in an embodiment of the present invention;

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

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

[0032] Figure 8 An exploded view of the structure of the arc extinguishing system in the embodiment of the present invention in the direction of the arc inlet;

[0033] Fig. 9 Schematic diagram of the structure of each upper chamber of the arc extinguishing system in an embodiment of the present invention;

[0034] Fig.10 Axonometric measurement of the arc extinguishing system in the embodiment of the present invention Figure 1 ;

[0035] Fig.11 A second isometric diagram of the arc extinguishing system in an embodiment of the present invention;

[0036] Fig.12 This is a schematic diagram of the installation of the upper arc dividing plate in an embodiment of the present invention;

[0037] Fig.13 This is a schematic diagram of the installation of the lower arc dividing plate in an embodiment of the present invention;

[0038] Fig.14 This is a schematic diagram of the structure of the two parts of the lower chamber in an embodiment of the present invention;

[0039] Fig.15 A partial cross-sectional schematic diagram of a flow guide member in an embodiment of the present invention;

[0040] Fig.16 Schematic diagram of the arrangement of arc extinguishing grids in an embodiment of the present invention;

[0041] Fig.17 It is an axonometric cross-sectional view of the arc extinguishing system in an embodiment of the present invention.

[0042] Among them, 1. baffle plate 1; 2. baffle plate 2; 3. moving arc-striking grid; 4. arc-isolating wall; 5. arc-extinguishing grid group; 6. flow guide; 7. flow guide hole; 8. lower chamber 1; 9. lower chamber 2; 10. lower arc-dividing baffle plate 1; 11. lower arc-dividing baffle plate 2; 12. exhaust hole; 13. support rod; 14. first free-dispersing net; 15. flow guide; 16. upper chamber 1; 17. upper chamber 2; 18. upper arc-dividing baffle plate 1; 19. upper arc-dividing baffle plate 2; 20. diversion slope 1; 21. air outlet; 22. isolation net; 23. bracket; 24. cover plate; 25. diversion slope 2; 26. air inlet; 27. long side; 28. short side; 29. ​​groove structure; 30. second free-dispersing net; 31. air-blocking arc-dividing structure; 32. arc-striking notch; 33. iron core. DETAILED DESCRIPTION

[0043] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0044] The purpose of the present invention is to provide an arc extinguishing 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 in which the sum of the chamber cross-sectional areas is greater than the cross-sectional area of ​​the arc outlet side can be obtained, which can not only efficiently eliminate charged particles in the arc gas, but also effectively reduce the exhaust resistance, thereby ensuring that the arc enters smoothly and is quickly extinguished in the arc extinguishing chamber.

[0045] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0046] like Figure 1 to Figure 17 As shown, the present invention provides an ion elimination component, including a flow guide 6, a flow guide 15, a chamber, and a first ion elimination net 14 and a second ion elimination net 30, wherein the flow guide 6 is provided with a flow guide hole 7, the arc inlet side of the flow guide hole 7 is used to connect the arc extinguishing grid gap in the arc extinguishing grid group 5, and guide the generated arc gas to the arc outlet side, and the flow guide hole 7 is provided with a plurality of flow guide holes according to the cross-sectional size of the arc outlet side of the arc extinguishing grid group 5. The flow guide 15 is provided with an outlet hole 21, and the outlet hole 21 is used to guide the ionized arc gas. The arc inlet side of the chamber is connected to the flow guide hole 7, and the arc outlet side of the chamber is connected to the outlet hole 21. The arc gas enters the outlet hole 21 through the flow guide hole 7 through the cavity, and is finally discharged from the outlet hole 21. The chamber includes at least one first chamber and at least one second chamber, and the first chamber and the second chamber can be distributed up and down, or left and right. It should be noted that the up, down, left, and right mentioned in this article are determined based on the direction from the arc outlet side to the de-ionization component (such as Figure 2c The directions can be directly determined as shown). The cross section of the first chamber gradually decreases from the arc entrance side to the arc exit side, and the cross section of the second chamber gradually increases from the arc entrance side to the arc exit side. The sum of the maximum cross section of the first chamber and the maximum cross section of the second chamber is greater than the cross section area of ​​the arc exit side of the arc extinguishing grid group 5. The first free-flowing elimination net 14 is arranged in the first chamber, and the number of the first free-flowing elimination net 14 corresponds to the number of the first chambers. The second free-flowing elimination net 30 is arranged in the second chamber, and the number of the second free-flowing elimination net 30 corresponds to the number of the second chambers.

[0047] The present invention can obtain a structure in which the sum of the cross-sectional areas of the chambers is greater than the cross-sectional area of ​​the arc outlet side by setting the first chamber and the second chamber, which can reduce the resistance of gas discharge from the arc outlet, promote arc movement, reduce the obstruction of the extinguishing network on the gas blowing effect, and prevent the circuit breaker casing from being damaged due to excessive internal pressure of the circuit breaker. Therefore, the present invention can not only efficiently eliminate charged particles in the arc gas, but also effectively reduce the exhaust resistance, ensuring that the arc smoothly enters and is quickly extinguished in the arc extinguishing chamber.

[0048] In one embodiment, it further includes a drainage slope 1 20 and a drainage slope 25. The drainage slope 1 20 is disposed in the second chamber, and the drainage slope 1 20 is used to guide the cross section of the second chamber to gradually increase. Each second chamber is provided with a separate drainage slope 1 20. The drainage slope 25 is disposed in the first chamber, and the drainage slope 25 is used to guide the cross section of the first chamber to gradually decrease. Each first chamber is provided with a separate drainage slope 25. The drainage slope 1 20 and the drainage slope 2 25 can be two opposite surfaces of the same structure.

[0049] like Figure 3 , Figure 4 and Fig.13 As shown, the lower chamber 1 8 and the lower chamber 2 9, under the action of the drainage slope 25 in each chamber, the chamber cross-section perpendicular to the line direction from the arc entrance side to the arc exit side gradually decreases, and the minimum cross-section at the end is the air outlet 21.

[0050] like Figure 3 , Figure 4 and Fig.12 As shown, the upper chamber 16 and the upper chamber 2 17, under the action of the drainage slope 1 20 in their respective chambers, the chamber cross-section perpendicular to the line direction from the arc entrance side to the arc exit side gradually increases, and the smallest cross-section is 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 is equivalent to increasing the exhaust space on the arc outlet side of the guide hole 7. At the same time, due to the effect of the second diversion slope 25, the resistance of the airflow change direction is reduced, so that the resistance of the airflow and the arc is greatly reduced when the airflow and the arc move from large to small in the lower chamber 1 8 and the lower chamber 2 9. Due to the effect of the diversion slope 1 20, the space of the upper chamber 1 16 and the upper chamber 2 17 toward the arc outlet side is rapidly increased, and the resistance of the airflow and the arc moving toward the arc outlet side is greatly reduced.

[0052] In one embodiment, the first de-ionization network 14 is arranged at the maximum cross-sectional position of the first chamber or close to the maximum cross-sectional position of the first chamber, and the second de-ionization network 30 is arranged at the maximum cross-sectional position of the second chamber or close to the maximum cross-sectional position of the second chamber. Through the above arrangement, without changing the overall size of the arc extinguishing system, the overall layout area of ​​the de-ionization network can be increased, the overall heat capacity of the de-ionization network can be increased, the contact area between the arc gas at the arc outlet of the arc extinguishing chamber and the de-ionization network can be increased, and the de-ionization effect of the de-ionization network can be improved, thereby improving the arc extinguishing ability and exhaust capacity of the arc extinguishing system, improving the breaking performance of the circuit breaker, shortening the arcing distance of the circuit breaker, and improving the breaking reliability.

[0053] like Figure 3 , Figure 4 and Fig.13 As shown, the lower arc dividing plate 10, the lower arc dividing plate 2 11 and the first deionization net 14 are respectively arranged at the larger chamber cross-section of the lower chamber 1 8 and the lower chamber 2 9, that is, the arc entrance side of the chamber.

[0054] like Figure 3 , Figure 4 and Fig.12 As shown, the upper arc dividing plate 1 18, the upper arc dividing plate 2 19 and the second deionization net 30 are respectively arranged at the larger chamber cross-section of the upper chamber 1 16 and the upper chamber 2 17, that is, the arc outlet side of the chamber.

[0055] In one embodiment, if Figure 2a , Figure 2b , Figure 2c , Figure 3 and Figure 4 As shown, a partition net 22 is arranged at the position of the air outlet 21 of the first chamber. The partition net 22 adopts a metal deionization net or a perforated insulating plate. When the metal deionization net is used, the arc gas passing through the first chamber is deionized again and external debris is blocked, thereby increasing the contact area with the deionization net, further improving the arc extinguishing effect, and blocking external debris; when a perforated insulating plate is used, it can play the effect of blocking external debris.

[0056] In one embodiment, the first deionization net 14 can be eliminated to reduce costs. In this case, reducing the cross-section of the air outlet 21 of the first chamber and using a partition net 22 to replace the deionization function of the first deionization net 14 can also produce considerable technical effects.

[0057] like Figure 1 to Figure 4As shown, a cover plate 24 is also provided on the arc outlet side of the flow guide 15, and the second detachment elimination net 30 and the partition net 22 are both located between the flow guide 15 and the cover plate 24, and the square hole structure of the cover plate 24 is respectively provided corresponding to the second detachment elimination net 30 and the partition net 22. A bracket 23 is provided between the second detachment elimination net 30 and the cover plate 24, and the bracket 23 has a certain thickness, so that the second detachment elimination net 30 and the cover plate 24 are kept at a certain distance. The movement path of the gas discharged from the second detachment elimination net 30 can be constrained to prevent the charged particles accidentally discharged from different chambers from re-contacting and causing short circuit breakdown.

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

[0059] In one embodiment, the lower chamber 1 8 and the lower chamber 2 9 can be combined into one chamber, that is, the first chamber can be provided with only one, and the partition between the lower chamber 1 8 and the lower chamber 2 9 is reduced to obtain a larger space for accommodating the second free-dispersing net 30. The upper chamber 1 16 and the upper chamber 2 17 can also be combined into one chamber, that is, the second chamber can be provided with only one, and the partition between the upper chamber 1 16 and the upper chamber 2 17 is reduced to obtain a larger space for accommodating the first free-dispersing net 14.

[0060] like Figure 3 , Figure 4 , Figure 8 and Fig.14 As shown, the left side space of the lower part of the flow guide member 6 cooperates with the flow guide member 15 to enclose a lower chamber 1 8. The right side space of the lower part of the flow guide member 6 cooperates with the flow guide member 15 to enclose a lower chamber 2 9.

[0061] like Figure 3 , Figure 4 , Fig. 9 As shown, the left side space of the upper part of the guide member 15 cooperates with the cover plate 24 to enclose the upper chamber 16. The right side space of the upper part of the guide member 15 cooperates with the cover plate 24 to enclose the upper chamber 2 17.

[0062] The lower chamber 1 8, the lower chamber 2 9, the upper chamber 1 16, and the upper chamber 2 17 are electrically isolated from each other. After the arc is discharged from the guide hole 7 of the guide member 6, it enters each chamber respectively and is ionized again.

[0063] In one embodiment, the arc-dividing diaphragm 10, the arc-dividing diaphragm 2 11, the arc-dividing diaphragm 1 18 and the arc-dividing diaphragm 2 19 are also included. The arc-dividing diaphragm 10, the arc-dividing diaphragm 2 11, the arc-dividing diaphragm 1 18 and the arc-dividing diaphragm 2 19 are respectively provided with exhaust holes 12, and an air-blocking arc-dividing structure 31 is formed between the exhaust holes 12. The air-blocking arc-dividing structure 31 is correspondingly arranged on the arc outlet side of the guide hole 7. The arc-dividing diaphragm 10 is arranged in the lower chamber 1 8 and is located between the first free-flowing elimination net 14 and the guide hole 7. The arc-dividing diaphragm 2 11 is arranged in the lower chamber 2 9 and is located between the first free-flowing elimination net 14 and the guide hole 7. The arc-dividing diaphragm 1 18 is arranged in the upper chamber 1 16 and is located between the second free-flowing elimination net 30 and the guide hole 7. The second upper arc dividing plate 19 is disposed in the second upper chamber 17 and is located between the second deionizing net 30 and the guide hole 7 .

[0064] like Figure 3 , Figure 4 and Fig.17 As shown, the lower arc-dividing baffle 10, the lower arc-dividing baffle 2 11, the upper arc-dividing baffle 1 18, and the upper arc-dividing baffle 2 19 are arranged at a certain interval from the end plane of the guide hole 7 in their respective chambers, and the interval range is 2mm to 8mm. The exhaust hole 12 is a long hole structure, that is, a long strip of air-blocking arc-dividing structure 31 is formed between the exhaust holes 12, and the air-blocking arc-dividing structure 31 is arranged one by one on the arc outlet side of the guide hole 7. In some simplified embodiments, each arc-dividing baffle can be a perforated structural plate without a specific shape, and its arc-dividing effect is slightly worse. The arc outlet sides of the lower arc-dividing baffle 10 and the lower arc-dividing baffle 2 11 are respectively arranged with a first deionizing net 14 at intervals, and the interval range is 2mm to 8mm. The arc outlet sides of the upper arc-dividing baffle 18 and the upper arc-dividing baffle 2 19 are respectively arranged with a second deionizing net 30 at intervals, and the interval range is 2mm to 8mm. A support rod 13 having a diameter consistent with the spacing size can be used as a spacing support between each arc dividing plate and its corresponding free-flowing net.

[0065] When the residual arc is discharged from each guide hole 7 of the guide member 6, the residual arc movement path is disrupted under the blocking effect of the air blocking arc splitting structure 31, and then discharged from the exhaust hole 12. The air blocking arc splitting structure 31 can prevent the arc from directly spraying each deionizing net, and prevent the high temperature of the arc from melting the deionizing net, resulting in reduced air permeability and deionizing effect of the deionizing net.

[0066] At the same time, the arc that first enters the upper chamber 16 and the upper chamber 2 17 is dispersed after being blocked by the air blocking arc splitting structure 31, and after passing through the exhaust hole 12, it gradually diffuses to the entire chamber under the action of the drainage slope 1 20, fully contacts with the second ion elimination net 30 and is ionized, and the residual gas is discharged through the cover plate 24. The arc that first enters the lower chamber 1 8 and the lower chamber 2 9 is dispersed after being blocked by the air blocking arc splitting structure 31, and fully contacts with the first ion elimination net 14 and is ionized, and the residual gas is discharged through the air outlet 21 under the constraint of the drainage slope 2 25. The gap between the guide hole 7 and each arc splitting baffle can reduce the resistance of each arc splitting baffle to the arc and airflow, so that the arc and airflow are more easily dispersed by the air blocking arc splitting structure 31. The gaps between the arc-dividing partitions and the free-dispersing nets allow the arc dispersed by the air-blocking arc-dividing structure 31 to fully diffuse to the surface of the free-dispersing nets and fully contact with the free-dispersing nets, thereby improving the utilization rate of the free-dispersing nets.

[0067] Since the projections of the first deionization net 14 and the second deionization net 30 on the vertical plane at least partially overlap, the sum of the cross-sectional areas of the first deionization net 14 and the second deionization net 30 is greater than the cross-sectional area of ​​the arc outlet of the arc extinguishing chamber, which fully improves the capacity of the deionization net without increasing the volume of the arc extinguishing system, while reducing the exhaust resistance and making full use of the air blowing effect.

[0068] like Figure 1 to Figure 17 As shown, the present invention further provides an arc extinguishing system, comprising an arc extinguishing grid group 5, a movable arc-starting grid 3 and an anti-ionization assembly as described above, wherein the arc extinguishing grid group 5 comprises arc extinguishing grids spaced apart in the thickness direction, and there is an arc extinguishing grid gap between the arc extinguishing grids. The movable arc-starting grid 3 is located outside the outermost arc extinguishing grid of the arc extinguishing grid group 5, that is, the upper part or the lower part of the arc extinguishing grid group 5. The arc inlet side of the guide hole 7 is connected to the arc extinguishing grid gap.

[0069] like Figure 1 , Figure 2a , Figure 2b , Figure 2c , Figure 8 , Fig.10 and Fig.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, which are located at the front and rear sides of the arc extinguishing system (such as Figure 8 The movable arc-striking grid 3 is located on the upper part of the arc-extinguishing grid group 5, and the end of the movable arc-striking grid 3 on the arc-entry side is a bent arc-striking structure. The arc-extinguishing grid group 5 and the movable arc-striking grid 3 are positioned and supported by 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-entry end of the moving arc-starting grid 3 to increase the heat capacity there, thereby preventing the arc from continuously burning and causing the bent arc-starting structure to melt and disappear, thereby avoiding the loss of arc-starting function.

[0071] like Figure 1 and Figure 8 As shown, the flow guide member 15 is arranged in close contact with the arc outlet side of the flow guide member 6 , and the cover plate 24 is arranged in close contact with the arc outlet side of the flow guide member 15 .

[0072] In one embodiment, the guide holes 7 correspond to the gaps between the arc extinguishing grids one by one, the guide holes 7 extend a certain length from the end of the arc extinguishing grid to the arc outlet side, and are arranged alternately on the left and right sides. A groove structure 29 is provided on the side of the guide member 6 facing the arc extinguishing grid group 5, and the groove structure 29 is used for inserting the arc extinguishing grid and the moving arc striking grid 3.

[0073] like Figure 8 , Fig.15 and Fig.17 As shown, the ends of the arc extinguishing grid group 5 and the moving arc-starting grid 3 on the arc outlet side are provided with a flow guide 6, and the flow guide 6 is made of insulating composite material. The flow guide 6 has flow guide holes 7, which correspond to the gaps of the arc extinguishing grids one by one, extend a certain length from the end of the arc extinguishing grid to the arc outlet side, and are arranged alternately on the left and right. The flow guide 6 forms a wrapping structure at the end of each arc extinguishing grid, and the arc and high-temperature gas in the gap between two adjacent arc extinguishing grids can be discharged alternately on the left and right from the flow guide holes 7, increasing the electrical gap for discharging the arc between adjacent arc extinguishing grids. Since the flow guide 6 is made of insulating material, the arc moving in the flow guide holes 7 can be further extinguished.

[0074] like Figure 8 As shown, the flow guide 6 has a groove structure 29, and the groove structure 29 is inserted and fitted with the arc extinguishing grid group 5 and the moving arc striking grid 3. Each arc extinguishing grid is inserted into the groove structure 29. The groove structure 29 can improve the air tightness of the left and right exhaust of the arc extinguishing grid gap, and prevent the arc from escaping from other directions and causing the arc to short-circuit again at the arc outlet end of the arc extinguishing grid.

[0075] In one embodiment, the arc extinguishing grid is provided with an arc striking notch 32 , the arc striking notch 32 is connected with 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 direction of the arc striking notch 32 corresponds to the guide hole 7 .

[0076] like Figure 6 and Figure 7As shown, the arc extinguishing grid group 5 is arranged by alternately arranging the arc extinguishing grids in mirror images. The arc extinguishing grid has an asymmetrically arranged arc striking notch 32, and the direction of the arc striking notch 32 is consistent with the direction of the corresponding flow guide hole 7. The arc striking notch 32 can easily deflect the arc movement path and move toward the corresponding flow guide hole 7, which can reduce the arc deflection resistance and facilitate the arc to move toward the arc outlet side of the arc extinguishing system.

[0077] like Figure 6 , Figure 7 and Fig.16 As shown, the two sides of the arc-entry opening (i.e., V-shaped opening) of the arc-extinguishing grid in the arc-extinguishing grid group 5 are asymmetrical structures, namely, the long side 27 and the short side 28. After the adjacent arc-extinguishing grids are arranged in mirror image, the long side 27 and the short side 28 on the same side of the arc-extinguishing grid are arranged alternately. When the arc first enters the arc-extinguishing system at the arc-entry opening, it first contacts the long side 27 of the arc-extinguishing grid. The distance between the arc-extinguishing grids on the two adjacent long sides 27 is large, which can reduce the resistance of the arc moving toward the arc-exit opening. After that, the arc contacts the arc-extinguishing grids on the short side 28, so that each arc-extinguishing grid cuts the arc simultaneously.

[0078] In one embodiment, it also includes baffle 1, baffle 2 and arc isolation wall 4, the arc isolation wall 4 is connected to the left and right sides of the arc extinguishing grid group 5, baffle 1 and baffle 2 are located on both sides of the arc entrance of the arc extinguishing grid group 5, baffle 1 and baffle 2 shield the two sides of the arc extinguishing grid, and are respectively fitted with the arc isolation wall 4 on both sides, baffle 1 and baffle 2 are made of insulating arc-resistant gas-producing composite material, when an arc is generated at the arc entrance, the insulating arc-resistant gas-producing composite material can be cracked under the action of high-temperature arc to generate particle vapor, which pushes the arc to move toward the arc outlet of the arc extinguishing system, and causes the arc to cool down to produce a gas blowing effect.

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

[0080] like Figure 6 and Figure 7 As shown, when the arc is generated at the arc entrance of the arc extinguishing system, baffle 1 and baffle 2 are pyrolyzed under the action of the high temperature arc to produce particle vapor, produce a gas blowing effect, push the arc to move toward the arc exit of the arc extinguishing system, and promote the arc to cool down. The arc is deflected under the joint action of the arc striking notch 32 and the guide hole 7 of each arc extinguishing grid, and the arc deflection direction in the gap between two adjacent arc extinguishing grids is different.

[0081] like Figure 5 and Fig.17As shown, after the arc is extinguished by the arc extinguishing grid group 5, the arc gas in the upper part passes through the guide hole 7 and enters the upper chamber 16 and the upper chamber 2 17 from the air inlet hole 26 of the guide member 15. The airflow and the residual arc are dispersed under the action of the air blocking and arc dividing structure 31 of the upper arc dividing baffle 18 and the upper arc dividing baffle 2 19, and are discharged from each exhaust hole 12. Under the action of the drainage slope 1 20, they are diffused to the entire chamber (upper chamber 16 and upper chamber 2 17), and the arc gas contacts the second ionizing net 30 with a large area and is ionized. After the high-temperature gas passes over the cover plate 24, it is discharged from the arc extinguishing system.

[0082] The arc gas in the lower part passes through the guide hole 7, is dispersed under the action of the gas blocking and arc dividing structure 31 of the lower arc dividing baffle 10 and the lower arc dividing baffle 2 11, and diffuses to the entire chamber (lower chamber 1 8 and lower chamber 2 9), and the arc gas contacts with the first ion extinguishing net 14 over a large area and is ionized, and the high-temperature gas is guided by the drainage slope 25 and discharged from the arc extinguishing system from the outlet hole 21.

[0083] After the arc is extinguished by the arc extinguishing grid group 5, the arc enters a plurality of mutually isolated chambers (lower chamber 1 8, lower chamber 2 9, upper chamber 1 16 and upper chamber 2 17), and is extinguished again through a plurality of large-capacity extinguishing nets (first extinguishing net 14, second extinguishing net 30 and partition net 22). By setting up a plurality of extinguishing nets, the heat capacity of the extinguishing nets is greatly increased without affecting the overall volume of the arc extinguishing system, the effective contact area between the residual arc and the extinguishing net is increased, and the extinguishing ability is improved. At the same time, the design of a plurality of drainage slopes (drainage slope 1 20 and drainage slope 2 25) reduces the exhaust resistance of the arc extinguishing system while guiding the arc and the airflow path, so that the arc passes through the arc extinguishing system quickly and is extinguished under the action of air blowing, thereby reducing the influence of high-pressure gas on the circuit breaker casing and improving the breaking performance and safety of the circuit breaker.

[0084] The present invention uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core ideas of the present invention. At the same time, for those skilled in the art, according to the ideas of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A deionization component, characterized in that: include: A flow guide member, wherein the flow guide member is provided with a flow guide hole; A flow guide member, wherein the flow guide member is provided with an air outlet; A chamber, wherein the arc entrance side of the chamber is connected to the guide hole, and the arc exit side of the chamber is connected to the air outlet hole, the chamber comprises at least one first chamber and at least one second chamber, the cross section of the first chamber gradually decreases from the arc entrance side to the arc exit side, the cross section of the second chamber gradually increases from the arc entrance side to the arc exit side, and the sum of the maximum cross section of the first chamber and the maximum cross section of the second chamber is greater than the cross section area of ​​the arc exit side of the arc extinguishing grid group; And a first free-eliminating net and a second free-eliminating net, wherein the first free-eliminating net is arranged in the first chamber, and the second free-eliminating net is arranged in the second chamber.

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

3. The deionization assembly according to claim 1, characterized in that: The first free-floating net is arranged at the maximum cross-sectional position of the first chamber or close to the maximum cross-sectional position of the first chamber, and the second free-floating net is arranged at the maximum cross-sectional position of the second chamber or close to the maximum cross-sectional position of the second chamber.

4. The deionization assembly according to claim 3, characterized in that: A partition is provided at the air outlet of the first chamber, and the partition is made of a metal ion-eliminating net or a porous insulating plate.

5. The deionization assembly according to claim 3, characterized in that: The first chamber includes a lower chamber 1 and a lower chamber 2 arranged in parallel, and the lower chamber 1 and the lower chamber 2 are opened in the guide member. The second chamber includes an upper chamber 1 and an upper chamber 2 arranged in parallel, and the upper chamber 1 and the upper chamber 2 are opened in the guide member.

6. The deionization assembly according to claim 5, characterized in that: It also includes a lower arc-dividing baffle plate 1, a lower arc-dividing baffle plate 2, an upper arc-dividing baffle plate 1 and an upper arc-dividing baffle plate 2, wherein the lower arc-dividing baffle plate 1, the lower arc-dividing baffle plate 2, the upper arc-dividing baffle plate 1 and the upper arc-dividing baffle plate 2 are respectively provided with exhaust holes, and an air-blocking arc-dividing structure is formed between the exhaust holes, and the air-blocking arc-dividing structure is correspondingly arranged on the arc outlet side of the guide hole; the lower arc-dividing baffle plate 1 is arranged in the lower chamber 1, and is located between the first free-eliminating net and the guide hole; the lower arc-dividing baffle plate 2 is arranged in the lower chamber 2, and is located between the first free-eliminating net and the guide hole; the upper arc-dividing baffle plate 1 is arranged in the upper chamber 1, and is located between the second free-eliminating net and the guide hole; the upper arc-dividing baffle plate 2 is arranged in the upper chamber 2, and is located between the second free-eliminating net and the guide hole.

7. An arc extinguishing system, characterized in that: include: An arc-extinguishing grid group, wherein the arc-extinguishing grid group comprises arc-extinguishing grids spaced apart in a thickness direction, and arc-extinguishing grid gaps are provided between the arc-extinguishing grids; A movable arc-striking grid, wherein the movable arc-striking grid is located outside the outermost arc-extinguishing grid of the arc-extinguishing grid group; And the deionization assembly according to any one of claims 1 to 6, wherein the arc entrance side of the guide hole is connected to the arc extinguishing grid gap.

8. The arc extinguishing system according to claim 7, characterized in that: The guide holes correspond to the gaps between the arc extinguishing grids one by one, the guide holes extend from the end of the arc extinguishing grid to the arc outlet side for a certain length, and are arranged alternately at left and right intervals, and a groove structure is provided on the side of the guide member facing the arc extinguishing grid group, and the groove structure is used for the arc extinguishing grid and the moving arc striking grid to be inserted.

9. The arc extinguishing system according to claim 8, characterized in that: The arc extinguishing grid is provided with an arc striking notch, the arc striking notch is connected with 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 direction of the arc striking notch corresponds to the guide hole.

10. The arc extinguishing system according to claim 7, characterized in that: It also includes baffle 1, baffle 2 and arc isolation wall, the arc isolation wall is connected to both sides of the arc extinguishing grid group, the baffle 1 and the baffle 2 are located on both sides of the arc entrance of the arc extinguishing grid group, the baffle 1 and the baffle 2 are respectively fitted with the arc isolation walls on both sides, and the baffle 1 and the baffle 2 are made of insulating arc-resistant gas-generating composite materials.

Images