High-voltage narrow-slit booster arc extinguishing device

Abstract

This utility model relates to the field of arc extinguishing devices and discloses a high-voltage narrow-slit pressurized arc extinguishing device, including an arc extinguishing shell, a mounting frame, an arc extinguishing assembly, and two first gas generating components. The bottom of the arc extinguishing shell is provided with a gas generating port, and the two first gas generating components are symmetrically arranged on both sides of the gas generating port. When the circuit breaker is tripped, the moving contact swings, causing the electric arc on it to enter between the two first gas generating components through the gas generating port. The arc extinguishing assembly is disposed on the mounting frame and is used to extinguish the electric arc between the two first gas generating components. A narrow slit is formed between the two first gas generating components, which makes the arc heat more concentrated, increases the arc voltage, accelerates the pyrolysis rate of the gas generating material, and generates more arc extinguishing gas per unit time, thereby improving the arc extinguishing effect.

Description

Technical Field

[0001] This utility model relates to the field of arc extinguishing devices, and in particular to a high-voltage narrow-slit booster arc extinguishing device. Background Technology

[0002] Arc-extinguishing devices are used to control and extinguish electric arcs in electrical equipment. When the power supply voltage is high and the breaking current is large, the electric arc can easily burn the contacts, or even cause a short circuit or fire. Arc-extinguishing devices eliminate the electric arc by lengthening the arc, cooling it down, or splitting the arc.

[0003] Publication number CN213635881U discloses an arc-extinguishing chamber structure for a low-voltage circuit breaker, belonging to the field of low-voltage electrical technology. It includes a pair of sidewalls, an arc-initiating plate, and a set of arc-extinguishing grid plates. The pair of sidewalls are spaced apart, and an array of arc-extinguishing grid plates is arranged between the pair of sidewalls. The arc-initiating plate is installed on the outer side of one end of the array of arc-extinguishing grid plates and extends into the arc-extinguishing chamber. The set of arc-extinguishing grid plates includes a first set of arc-extinguishing grid plates, a second set of arc-extinguishing grid plates, and a third set of arc-extinguishing grid plates. The first set of arc-extinguishing grid plates is located on the side of the second set of arc-extinguishing grid plates away from the arc-initiating plate, and the third set of arc-extinguishing grid plates is located on the side of the second set of arc-extinguishing grid plates closer to the arc-initiating plate. The bottoms of the first set of arc-extinguishing grid plates, the second set of arc-extinguishing grid plates, and the third set of arc-extinguishing grid plates are arranged in a stepped manner with gradually increasing height towards the location of the arc-initiating plate.

[0004] However, the current arc-extinguishing chamber has a large distance between the two gas-generating components, which leads to a lower arc voltage between the two components, resulting in a lower pyrolysis rate of the gas-generating components and less arc-extinguishing gas generated, thus making the arc-extinguishing effect of the arc-extinguishing chamber poor. Utility Model Content

[0005] The purpose of this invention is to provide a high-voltage narrow-slit booster arc extinguishing device to solve the problems existing in the prior art.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A high-voltage narrow-slit booster arc-extinguishing device includes an arc-extinguishing housing, a mounting frame, an arc-extinguishing assembly, and two first gas-generating components. The arc-extinguishing housing has a gas-generating port at its bottom, and the two first gas-generating components are symmetrically arranged on both sides of the gas-generating port. When the circuit breaker trips, the moving contact swings, causing the electric arc on it to enter the space between the two first gas-generating components through the gas-generating port. The arc-extinguishing assembly, mounted on the mounting frame, is used to extinguish the arc between the two first gas-generating components. A narrow slit is formed between the two first gas-generating components. This narrow slit concentrates the arc heat, increases the arc voltage, accelerates the pyrolysis rate of the gas-generating material, and generates more arc-extinguishing gas per unit time, thereby improving the arc-extinguishing effect.

[0008] Furthermore, the narrow gap between the two first gas-generating components is 11mm, which is smaller than the gap in existing arc-extinguishing equipment. By reducing the gap, the arc-extinguishing effect is improved.

[0009] Furthermore, the mounting bracket includes a support member and two lower arc-extinguishing plates. The support member has three vertical air passage slots on the side away from the plurality of second arc-extinguishing grids, and a partition plate portion is provided near the bottom of the plurality of second arc-extinguishing grids. A first exhaust port is provided at the top of the arc-extinguishing housing. The arc-extinguishing assembly includes a plurality of first arc-extinguishing grids and a plurality of second arc-extinguishing grids. The two lower arc-extinguishing plates are symmetrically arranged on both sides of the gas-generating port. The support member is disposed above the two first gas-generating components and connected to the two lower arc-extinguishing plates; the support member is used to separate the plurality of first arc-extinguishing grids and the plurality of second arc-extinguishing grids. An array of a plurality of first arc-extinguishing grids is disposed below the support member and above the two first gas-generating components. The upper end of the air passage slot extends to the first exhaust port, and the lower end connects to the upper part of the plurality of first arc-extinguishing grids. The lower end of the partition plate portion extends to the lower end of the plurality of first arc-extinguishing grids, thereby separating the first and second arc-extinguishing grids.

[0010] Furthermore, the mounting bracket also includes an arc-initiating plate, the lower end of which is provided with an arc-initiating plate portion. The arc-initiating plate is located on the side of the plurality of first arc-extinguishing grids away from the plurality of second arc-extinguishing grids. The arc-initiating plate portion is located between two first gas-generating elements and is used to guide the electric arc to the plurality of first arc-extinguishing grids for arc extinguishing. The gas generated during the arc extinguishing process is discharged through three gas channel slots and a first exhaust port, thereby improving the heat dissipation effect.

[0011] Furthermore, the mounting frame also includes a first arc-initiating plate, a third arc-extinguishing grid plate, two second gas-generating components, and an upper arc-isolating plate. The two upper arc-isolating plates are symmetrically arranged on both sides of the gas-generating port, each positioned directly above the two lower arc-isolating plates, with its lower end contacting the upper end of the two lower arc-isolating plates. The first arc-initiating plate is disposed against the surface of the support member near the surface of several second arc-extinguishing grid plates. The two second gas-generating components are disposed on the side of the first arc-initiating plate away from the support member, symmetrically arranged on both sides of the gas-generating port. The edges of the two second gas-generating components near the first arc-initiating plate abut against the first arc-initiating plate, and the outer surfaces of the two second gas-generating components are provided with fixing holes. The two upper arc-isolating plates are provided with fastening holes corresponding to the fixing holes, and screws are threaded through the fastening holes and screwed into the fixing holes. The third arc-extinguishing grid plate is disposed on the side of the two second gas-generating components away from the first arc-initiating plate. The first arc-initiating plate, the two second gas-generating components, and the third arc-extinguishing grid plate together constitute an arc-extinguishing gas channel.

[0012] Furthermore, the top of the arc-extinguishing housing is provided with a third exhaust port, and the mounting bracket also includes a second arc-initiating plate. The upper end of the third arc-extinguishing grid has a third arc-initiating portion, the upper end of which is inclined outwards. The upper part of the second arc-initiating plate is provided with a second arc-initiating portion. A plurality of second arc-extinguishing grids are arrayed above the two second gas-generating components. The second arc-initiating plate is located on the side of the plurality of second arc-extinguishing grids away from the first arc-initiating plate. The second arc-initiating portion is parallel to the third arc-initiating portion and is used to divide the arc entering the arc-extinguishing gas passage, allowing part of the arc to move through the gas passage between them to the outside of the second arc-initiating portion for arc extinguishing. The gas generated during the arc extinguishing process is discharged through the third exhaust port, improving the heat dissipation effect.

[0013] Furthermore, the arc-extinguishing assembly also includes three anti-ionization meshes and a breakdown protection component. The breakdown protection component has three mounting slots on its top surface, and the top of the arc-extinguishing housing has three second exhaust ports. The first exhaust port, the three second exhaust ports, and the third exhaust port are arranged alternately. The three mounting slots communicate downwards with the upper parts of several second arc-extinguishing grid plates. The insertion blocks on both sides of the breakdown protection component are inserted into corresponding insertion holes on two upper arc-blocking plates. The three anti-ionization meshes are respectively installed in the three mounting slots, corresponding to the three second exhaust ports. The arc is extinguished by the arc-extinguishing gas passage and the several second arc-extinguishing grid plates. The breakdown protection component and the three anti-ionization meshes can eliminate the ionized arc, and the gas generated during arc extinguishing is discharged from the three second exhaust ports, improving heat dissipation. By setting the breakdown protection component and the anti-ionization meshes, the arc-extinguishing effect is further improved.

[0014] Furthermore, the spacing between the second arc-extinguishing grid plates is 1.9 mm. The spacing between the first arc-extinguishing grid plates is 2 mm, which is narrower than the existing arc-extinguishing grid plates. Therefore, more arc-extinguishing grid plates can be installed in a limited space, dividing the arc into more parts and improving the arc-extinguishing effect.

[0015] Furthermore, the arc-initiating plate, the first arc-initiating plate, the second arc-initiating plate, the support member, several first arc-extinguishing grid plates, several second arc-extinguishing grid plates, the third arc-extinguishing grid plate, three de-detachment nets, the anti-penetration member, two first gas-generating members and two second gas-generating members are located between two lower arc-blocking plates or two upper arc-blocking plates.

[0016] Furthermore, the arc-extinguishing housing is composed of two half-housing units, which facilitates disassembly and assembly.

[0017] The beneficial effects of this utility model are:

[0018] 1. The narrow gap between the two primary gas-generating components concentrates the arc heat, increases the arc voltage, accelerates the pyrolysis rate of the gas-generating material, and generates more arc-extinguishing gas per unit time, thereby improving the arc-extinguishing effect.

[0019] 2. The arc-initiating plate guides the electric arc to several first arc-extinguishing grid plates for arc extinguishing. The gas generated during the arc extinguishing process is discharged through three air channels and the first exhaust port. The second and third arc-initiating parts divide the electric arc entering the arc-extinguishing air channels, allowing some of the electric arc to move outside the second arc-initiating part through the air channels between them for arc extinguishing. The gas generated during the arc extinguishing process is discharged through the third exhaust port. The electric arc is extinguished by passing through the arc-extinguishing air channels and several second arc-extinguishing grid plates. The anti-breakdown component and three anti-ionization meshes can eliminate the free arc. The gas generated during arc extinguishing is discharged from the three second exhaust ports, thereby improving the overall heat dissipation effect.

[0020] 3. The spacing between the second arc-extinguishing grid plates and the first arc-extinguishing grid plates is narrower than that between existing arc-extinguishing grid plates. Therefore, more arc-extinguishing grid plates can be installed in a limited space, dividing the electric arc into more parts and improving the arc-extinguishing effect. Attached Figure Description

[0021] Figure 1 This is an exploded structural diagram of the present invention;

[0022] Figure 2 This is a side view of the present invention;

[0023] Figure 3 This is a frontal cross-sectional structural diagram of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the present invention for eliminating free nets.

[0025] Explanation of reference numerals in the attached drawings: 1. Arc-extinguishing shell; 11. Gas generation port; 12. First exhaust port; 13. Third exhaust port; 14. Second exhaust port; 2. Mounting bracket; 21. Support component; 211. Gas channel groove; 212. Partition plate; 22. Lower arc-isolating plate; 23. Arc-starting plate; 231. Arc-starting plate; 24. First arc-starting plate; 25. Third arc-extinguishing grid plate; 251. Third arc-starting part; 26. Second gas generation component; 261. Fixing hole; 27. Upper arc-isolating plate; 28. Second arc-starting plate; 281. Second arc-starting part; 3. Arc-extinguishing assembly; 31. First arc-extinguishing grid plate; 32. Second arc-extinguishing grid plate; 33. Anti-freezing net; 34. Anti-penetration component; 341. Mounting groove; 4. First gas generation component; 41. Narrow slit. Detailed Implementation

[0026] The following will describe the concept and technical effects of this utility model clearly and completely with reference to the embodiments, so as to fully understand the purpose, features and effects of this utility model.

[0027] like Figure 1-4As shown, a high-voltage narrow-slit booster arc-extinguishing device includes an arc-extinguishing housing 1, a mounting frame 2, an arc-extinguishing assembly 3, and two first gas-generating components 4. The arc-extinguishing housing 1 has a gas-generating port 11 at its bottom, and the two first gas-generating components 4 are symmetrically arranged on both sides of the gas-generating port 11. When the circuit breaker trips, the moving contact swings, causing the electric arc on it to enter between the two first gas-generating components 4 through the gas-generating port 11. The mounting frame 2 is disposed inside the arc-extinguishing housing 1, and the arc-extinguishing assembly 3 is disposed on the mounting frame 2 for extinguishing the arc between the two first gas-generating components 4.

[0028] A narrow slit 41 is formed between the two first gas-generating components 4. This narrow slit 41 concentrates the arc heat, increases the arc voltage, accelerates the pyrolysis rate of the gas-generating material, and generates more arc-extinguishing gas per unit time, thereby improving the arc-extinguishing effect. The narrow slit 41 between the two first gas-generating components 4 is 11mm, which is smaller than the gap in existing arc-extinguishing equipment. By reducing the gap, the arc-extinguishing effect is improved.

[0029] The mounting frame 2 includes a support member 21 and two lower arc-extinguishing plates 22; the top of the arc-extinguishing housing 1 is provided with a first exhaust port 12. The arc-extinguishing assembly 3 includes a plurality of first arc-extinguishing grid plates 31 and a plurality of second arc-extinguishing grid plates 32. The two lower arc-extinguishing plates 22 are symmetrically arranged on both sides of the gas-generating port 11, and their side edges, lower edges, and outer surfaces are in close contact with the inner wall of the arc-extinguishing housing 1. The outer surfaces of the two first gas-generating components 4 are respectively in close contact with the inner surfaces of the two lower arc-extinguishing plates 22. The support member 21 is disposed above the two first gas-generating components 4, and its two side inserts are inserted into the corresponding insertion holes on the two lower arc-extinguishing plates 22. The support member 21 is used to separate the plurality of first arc-extinguishing grid plates 31 and the plurality of second arc-extinguishing grid plates 32.

[0030] A plurality of first arc-extinguishing grid plates 31 are arrayed below the support member 21 and above the two first gas generating components 4, with their upper ends inserted into corresponding slots on the bottom surface of the support member 21. The insert portions on both sides of the plurality of first arc-extinguishing grid plates 31 are inserted into corresponding insertion holes on the two lower arc-blocking plates 22, and their feet are inserted into corresponding slots on the two first gas generating components 4. The support member 21 has three vertical air passage slots 211 on the side away from the plurality of second arc-extinguishing grid plates 32. The upper ends of the air passage slots 211 extend to the first exhaust port 12, and the lower ends connect to the upper parts of the plurality of first arc-extinguishing grid plates 31. The support member 21 has a partition plate portion 212 near the bottom of the plurality of second arc-extinguishing grid plates 32, with the lower end of the partition plate portion 212 extending to the lower end of the plurality of first arc-extinguishing grid plates 31.

[0031] The mounting bracket 2 also includes an arc-initiating plate 23. The arc-initiating plate 23 is perpendicular to the two lower arc-blocking plates 22 and is located on the side of the plurality of first arc-extinguishing grid plates 31 away from the plurality of second arc-extinguishing grid plates 32. The arc-initiating plate 23 abuts against the two lower arc-blocking plates 22 on both sides, its lower edge contacts the top surface of the two first gas-generating components 4, and its upper end is inserted into the corresponding slot of the support member 21. The lower end of the arc-initiating plate 23 is provided with an arc-initiating plate portion 231, which is located between the two first gas-generating components 4 and contacts the two first gas-generating components 4 on both sides. It is used to guide the electric arc to the plurality of first arc-extinguishing grid plates 31 for arc extinguishing. The gas generated during the arc extinguishing process is discharged through three gas channel slots 211 and the first exhaust port 12.

[0032] The mounting frame 2 also includes a first arc-inducing plate 24, a third arc-extinguishing grid plate 25, two second gas-generating components 26, and an upper arc-isolating plate 27. The two upper arc-isolating plates 27 are symmetrically arranged on both sides of the gas-generating port 11, with their side edges, upper edges, and outer surfaces in close contact with the inner wall of the arc-extinguishing housing 1. Each of the two upper arc-isolating plates 27 is located directly above the two lower arc-isolating plates 22, and their lower ends are in contact with the upper ends of the two lower arc-isolating plates 22.

[0033] The first arc-inducing plate 24 is disposed close to the surface of the support member 21 near the surface of several second arc-extinguishing grid plates 32, and its upper part is bent towards the side near the several first arc-extinguishing grid plates 31. Two second gas-generating components 26 are disposed on the side of the first arc-inducing plate 24 away from the support member 21, symmetrically arranged on both sides of the gas-generating port 11. The edges of the two second gas-generating components 26 near the first arc-inducing plate 24 abut against the first arc-inducing plate 24, and the outer surfaces of the two second gas-generating components 26 are provided with fixing holes 261. The two upper arc-blocking plates 27 are provided with fastening holes corresponding to the fixing holes 261, and screws are screwed into the fixing holes 261 through the fastening holes.

[0034] The third arc-extinguishing grid plate 25 is disposed on the side of the two second gas generating components 26 away from the first arc-initiating plate 24, and is perpendicular to the two upper arc-blocking plates 27. The insert parts on both sides of the third arc-extinguishing grid plate 25 are inserted into the corresponding insertion holes on the two lower arc-blocking plates 22, and the feet are inserted into the corresponding slots on the two first gas generating components 4. The first arc-initiating plate 24, the two second gas generating components 26, and the third arc-extinguishing grid plate 25 together constitute the arc-extinguishing gas channel.

[0035] A plurality of second arc-extinguishing grid plates 32 are arrayed above two second gas generating components 26, with their lower ends inserted into slots corresponding to the top surfaces of the two second gas generating components 26, and the insert blocks on both sides of the plurality of second arc-extinguishing grid plates 32 are inserted into corresponding insertion holes on two upper arc-isolating plates 27.

[0036] The top of the arc-extinguishing housing 1 is provided with a third exhaust port 13. The mounting bracket 2 also includes a second arc-initiating plate 28. The upper end of the third arc-extinguishing grid plate 25 is provided with a third arc-initiating part 251, and the upper end of the third arc-initiating part 251 is inclined outward. The second arc-initiating plate 28 is disposed on the side of several second arc-extinguishing grid plates 32 away from the first arc-initiating plate 24, and the insert parts on both sides of it are inserted into the corresponding insertion holes on two upper arc-blocking plates 27. The upper part of the second arc-initiating plate 28 is provided with a second arc-initiating part 281, which is parallel to the third arc-initiating part 251. It is used to divide the arc entering the arc-extinguishing gas passage, so that part of the arc moves to the outside of the second arc-initiating part 281 through the gas passage between the two for arc extinguishing. The gas generated during the arc extinguishing process is discharged through the third exhaust port 13.

[0037] The arc-extinguishing assembly 3 also includes three anti-free nets 33 and anti-penetration components 34. The top of the arc-extinguishing housing 1 is provided with three second exhaust ports 14, and the first exhaust port 12, the three second exhaust ports 14 and the third exhaust port 13 are arranged in sequence at intervals.

[0038] The top surface of the anti-penetration component 34 is provided with three mounting slots 341, which communicate downwards with the upper parts of a plurality of second arc-extinguishing grid plates 32. The insert blocks on both sides of the anti-penetration component 34 are inserted into corresponding insertion holes on two upper arc-blocking plates 27. The upper ends of the plurality of second arc-extinguishing grid plates 32 are inserted into corresponding slots on the bottom surface of the anti-penetration component 34.

[0039] Three anti-ionizing nets 33 are respectively installed in three mounting slots 341, corresponding to three second exhaust ports 14. The electric arc is extinguished by passing through the arc-extinguishing gas channel and several second arc-extinguishing grids 32. The anti-breakdown component 34 and the three anti-ionizing nets 33 can eliminate the ionized electric arc, and the gas generated during arc extinguishing is discharged from the three second exhaust ports 14. By setting the anti-breakdown component 34 and the anti-ionizing nets 33, the arc extinguishing effect is further improved.

[0040] The spacing between the second arc-extinguishing grid plates 32 is 1.9 mm. The spacing between the first arc-extinguishing grid plates 31 is 2 mm, which is narrower than the existing arc-extinguishing grid plates. Therefore, more arc-extinguishing grid plates can be installed in a limited space, dividing the arc into more parts and improving the arc-extinguishing effect.

[0041] The arc-extinguishing shell 1 is composed of two half-shells for easy assembly and disassembly. The arc-initiating plate 23, the first arc-initiating plate 24, the second arc-initiating plate 28, the support member 21, a number of first arc-extinguishing grid plates 31, a number of second arc-extinguishing grid plates 32, the third arc-extinguishing grid plate 25, three de-detachment nets 33, the anti-penetration member 34, two first gas-generating members 4 and two second gas-generating members 26 are located between two lower arc-blocking plates 22 or two upper arc-blocking plates 27.

[0042] The arc-extinguishing shell 1, support member 21, and anti-penetration member 34 are made of DMC material; the upper arc-isolating plate 27 and lower arc-isolating plate 22 are made of melamine material; the first gas-generating member 4 and the second gas-generating member 26 are made of gas-generating material. The first arc-extinguishing grid plate 31, the second arc-extinguishing grid plate 32, the third arc-extinguishing grid plate 25, the first arc-initiating plate 24, and the second arc-initiating plate 28 are made of ferromagnetic material. The de-idling mesh 33 is made of stainless steel woven mesh.

[0043] Working process: When the circuit breaker breaks, the moving contact swings, causing the electric arc on it to enter between the two first gas generating elements 4 through the gas generating port 11. Part of the arc is extinguished by the arc extinguishing gas passage and several second arc extinguishing grids 32. The anti-breakdown element 34 and three anti-ionization nets 33 can eliminate the free arc. The gas generated during arc extinguishing is discharged from the three second exhaust ports 14. The second arc ignition part 281 and the third arc ignition part 251 divide the arc entering the arc extinguishing gas passage, causing part of the arc to move to the outside of the second arc ignition part 281 through the gas passage between them for arc extinguishing. The gas generated during the arc extinguishing process is discharged through the third exhaust port 13. The arc ignition plate 23 guides part of the arc to several first arc extinguishing grids 31 for arc extinguishing. The gas generated during the arc extinguishing process is discharged through the three gas passage slots 211 and the first exhaust port 12, thereby improving the overall heat dissipation effect.

[0044] The above embodiments are only some embodiments of this utility model, not all embodiments. Other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are all within the protection scope of this utility model.

Claims

1. A high-voltage narrow-slit booster arc extinguishing device, comprising an arc extinguishing housing (1), a mounting frame (2), an arc extinguishing assembly (3), and two first gas generating components (4); the arc extinguishing housing (1) is provided with a gas generating port (11) at the bottom, and the two first gas generating components (4) are symmetrically arranged on both sides of the gas generating port (11); when the circuit breaker is disconnected, the moving contact swings and drives the electric arc on it to enter between the two first gas generating components (4) through the gas generating port (11); the arc extinguishing assembly (3) is arranged on the mounting frame (2) and is used to extinguish the electric arc between the two first gas generating components (4); Its features are, A narrow slit (41) is formed between the two first gas-producing elements (4).

2. The high-voltage narrow-slit booster arc-extinguishing device according to claim 1, characterized in that: The narrow gap (41) between the two first gas-producing components (4) is 11 mm.

3. The high-voltage narrow-slit booster arc-extinguishing device according to claim 1, characterized in that: The mounting bracket (2) includes a support member (21) and two lower arc-extinguishing plates (22); the support member (21) has three vertical air passage slots (211) on the side away from the plurality of second arc-extinguishing grid plates (32), and the support member (21) has a partition plate portion (212) near the bottom of the plurality of second arc-extinguishing grid plates (32); the top of the arc-extinguishing housing (1) has a first exhaust port (12); the arc-extinguishing assembly (3) includes a plurality of first arc-extinguishing grid plates (31) and a plurality of second arc-extinguishing grid plates (32); Two lower arc-blocking plates (22) are symmetrically arranged on both sides of the gas-generating port (11); the support member (21) is arranged above the two first gas-generating components (4) and connected to the two lower arc-blocking plates (22); the support member (21) is used to separate a number of first arc-extinguishing grid plates (31) and a number of second arc-extinguishing grid plates (32); an array of a number of first arc-extinguishing grid plates (31) is arranged below the support member (21) and above the two first gas-generating components (4); the upper end of the gas channel groove (211) extends to the first exhaust port (12), and the lower end connects to the upper part of a number of first arc-extinguishing grid plates (31); the lower end of the partition plate part (212) extends to the lower end of a number of first arc-extinguishing grid plates (31).

4. The high-voltage narrow-slit booster arc-extinguishing device according to claim 3, characterized in that: The mounting bracket (2) also includes an arc-inducing piece (23), and the lower end of the arc-inducing piece (23) is provided with an arc-inducing plate (231); The arc-initiating plate (23) is located on the side away from the first arc-extinguishing grid plates (31) and the second arc-extinguishing grid plates (32); the arc-initiating plate (231) is located between the two first gas-generating components (4) and is used to guide the electric arc to the first arc-extinguishing grid plates (31) for arc extinguishing. The gas generated during the arc extinguishing process is discharged through three gas channel slots (211) and the first exhaust port (12).

5. A high-voltage narrow-slit booster arc-extinguishing device according to claim 4, characterized in that: The mounting frame (2) also includes a first arc-inducing plate (24), a third arc-extinguishing grid plate (25), two second gas-generating components (26) and an upper arc-isolating plate (27); Two upper arc-blocking plates (27) are symmetrically arranged on both sides of the gas-generating port (11), and each of the two upper arc-blocking plates (27) is arranged directly above the two lower arc-blocking plates (22), with its lower end contacting the upper end of the two lower arc-blocking plates (22); the first arc-initiating plate (24) is arranged close to the surface of the support member (21) near a plurality of second arc-extinguishing grid plates (32); two second gas-generating components (26) are arranged on the side of the first arc-initiating plate (24) away from the support member (21), and symmetrically arranged on both sides of the gas-generating port (11); the two second gas-generating components (26) The edge of the first arc-initiating plate (24) is close to the first arc-initiating plate (24), and the outer surface of the two second gas-generating components (26) is provided with fixing holes (261); the two upper arc-blocking plates (27) are provided with fastening holes corresponding to the fixing holes (261), and screws are screwed into the fixing holes (261) through the fastening holes; the third arc-extinguishing grid plate (25) is provided on the side of the two second gas-generating components (26) away from the first arc-initiating plate (24); the first arc-initiating plate (24), the two second gas-generating components (26) and the third arc-extinguishing grid plate (25) together constitute the arc-extinguishing gas channel.

6. A high-voltage narrow-slit booster arc-extinguishing device according to claim 5, characterized in that: The top of the arc-extinguishing housing (1) is provided with a third exhaust port (13), the mounting bracket (2) also includes a second arc-inducing plate (28), the upper end of the third arc-extinguishing grid plate (25) is provided with a third arc-inducing part (251), the upper end of the third arc-inducing part (251) is inclined to the outside, and the upper part of the second arc-inducing plate (28) is provided with a second arc-inducing part (281). A plurality of second arc-extinguishing grid plates (32) are arranged above two second gas generating components (26); the second arc-initiating plate (28) is arranged on the side of the plurality of second arc-extinguishing grid plates (32) away from the first arc-initiating plate (24); the second arc-initiating part (281) is parallel to the third arc-initiating part (251) and is used to divide the electric arc entering the arc-extinguishing gas passage, so that part of the electric arc moves to the outside of the second arc-initiating part (281) through the gas passage between the two for arc extinguishing, and the gas generated during the arc extinguishing process is discharged through the third exhaust port (13).

7. A high-voltage narrow-slit booster arc-extinguishing device according to claim 6, characterized in that: The arc extinguishing assembly (3) also includes three de-free nets (33) and a penetration protection component (34). The top surface of the penetration protection component (34) is provided with three mounting slots (341). The top of the arc extinguishing housing (1) is provided with three second exhaust ports (14). The first exhaust port (12), the three second exhaust ports (14) and the third exhaust port (13) are arranged in sequence at intervals. The three mounting slots (341) are connected downward to the upper part of several second arc-extinguishing grid plates (32); the plugs on both sides of the anti-penetration component (34) are inserted into the corresponding holes on the two upper arc-blocking plates (27); the three deionization nets (33) are respectively installed in the three mounting slots (341) and correspond to the three second exhaust ports (14); the electric arc is extinguished by the arc-extinguishing gas passage and several second arc-extinguishing grid plates (32), the anti-penetration component (34) and the three deionization nets (33) can eliminate the free electric arc, and the gas generated by the arc extinguishing is discharged from the three second exhaust ports (14).

8. A high-voltage narrow-slit booster arc-extinguishing device according to claim 7, characterized in that: The spacing between a number of second arc-extinguishing grid plates (32) is 1.9 mm; the spacing between a number of first arc-extinguishing grid plates (31) is 2 mm.

9. A high-voltage narrow-slit booster arc-extinguishing device according to claim 8, characterized in that: Arc-initiating plate (23), first arc-initiating plate (24), second arc-initiating plate (28), support member (21), several first arc-extinguishing grid plates (31), several second arc-extinguishing grid plates (32), third arc-extinguishing grid plate (25), three de-freezing nets (33), anti-penetration member (34), two first gas-generating members (4) and two second gas-generating members (26) are located between two lower arc-blocking plates (22) or two upper arc-blocking plates (27).

10. A high-voltage narrow-slit booster arc-extinguishing device according to claim 1, characterized in that: The arc-extinguishing shell (1) consists of two half-shells.

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