CN217983189U - Spout structure and have its circuit breaker - Google Patents

Abstract

The utility model provides a spout structure and have its circuit breaker, the spout structure includes: the nozzle component is provided with an arc extinguishing channel for the penetration of a moving arc contact and a static arc contact of the circuit breaker; the air cavity assembly is arranged in the arc extinguishing channel, a first circulation gap is formed between the air cavity assembly and the inner wall surface of the arc extinguishing channel, and the first circulation gap is communicated with an air chamber of the circuit breaker; the air cavity component is provided with a through hole for the static arc contact or the dynamic arc contact of the circuit breaker to pass through, and the through hole is used for being communicated with the rod cavity of the pull rod of the circuit breaker; the air cavity assembly comprises an air cavity and a communicating channel communicated with the air cavity, and the communicating channel is communicated with the air cavity and the first circulating gap; the air cavity has an air cavity opening in communication with the through-bore. The utility model provides a high voltage circuit breaker among the prior art have the ability less strong problem of breaking electric arc.

Description

Spout structure and have its circuit breaker

Technical Field

The utility model relates to a circuit breaker field particularly, relates to a spout structure and have its circuit breaker.

Background

The on-load breaking process of the arc extinguish chamber of the high-voltage circuit breaker is an extremely complex physical process relating to the professions of thermodynamics, gas dynamics, electromagnetism, high-voltage insulation and the like, and the burning and extinguishing of electric arcs are closely related to the structure of the arc extinguish chamber.

In the breaking process, after a moving arc contact and a static arc contact of the high-voltage circuit breaker are separated, electric arcs can be generated due to high voltage. The basic principle of the conventional breaking device of the alternating current circuit breaker is that gas in a cylinder is compressed, the gas blows out electric arcs through a nozzle at high speed, and the breaking device is broken when the energy of the electric arcs is lowest at a zero crossing point.

However, since the alternating current has zero-crossing points and the direct current has no zero-crossing points, the capability of breaking the direct current arc of the general high-voltage circuit breaker is very low, and the high-voltage circuit breaker generally needs to be equipped with additional auxiliary equipment for manufacturing the zero-crossing of the current for breaking, so that the cost is very high.

Therefore, the high-voltage circuit breaker in the prior art has the problems of poor capability of breaking the arc and high cost.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a main aim at provides a spout structure and have its circuit breaker to there is the weaker problem of ability of breaking electric arc in the high voltage circuit breaker who solves among the prior art.

In order to achieve the above object, according to an aspect of the present invention, there is provided a nozzle structure, including: the nozzle component is provided with an arc extinguishing channel for the penetration of a moving arc contact and a static arc contact of the circuit breaker; the air cavity assembly is arranged in the arc extinguishing channel, a first circulation gap is formed between the air cavity assembly and the inner wall surface of the arc extinguishing channel, and the first circulation gap is communicated with an air chamber of the circuit breaker; the air cavity component is provided with a through hole for the static arc contact or the dynamic arc contact of the circuit breaker to pass through, and the through hole is used for being communicated with the rod cavity of the pull rod of the circuit breaker; the air cavity component comprises an air cavity component, the air cavity component is provided with an air cavity, the air cavity component and the nozzle component are arranged at intervals to form a communicating channel, and the communicating channel is respectively communicated with the air cavity and the first circulation gap; the air cavity component has an air cavity opening communicating the through-bore with the air cavity.

Further, the spout assembly further includes: the first nozzle component is provided with an arc extinguishing channel; the second nozzle opening component is provided with an inserting hole for inserting a moving arc contact and a static arc contact of the circuit breaker, at least part of the second nozzle opening component is positioned in the arc extinguishing channel, and a second circulation gap is formed between the outer surface of the first nozzle opening component and the inner wall surface of the arc extinguishing channel; the air cavity assembly is located on one side, far away from the air chamber, of the second nozzle component, the first circulation gap and the second circulation gap are communicated to form a gap channel together, and a first channel used for communicating the gap channel and the through hole is formed between the air cavity assembly and the second nozzle component.

Further, a communication hole is formed in the second nozzle part, and two ends of the communication hole are respectively communicated with the second circulation gap and the first channel.

Further, the center line of the communicating hole is inclined to the center line of the through hole, and the outlet of the communicating hole is inclined to one side, close to the air cavity component, of the second nozzle component; and/or the inserting hole comprises a first hole section and a second hole section, and the minimum inserting section of the first hole section is larger than the minimum inserting section of the second hole section; the first hole section is used for inserting the moving arc contact, the second hole section is used for allowing the static arc contact to penetrate through, and at least part of the inner wall surface of the second hole section is matched with the outer wall surface of the static arc contact.

Further, one end of the first nozzle component, which is far away from the air chamber, is provided with a first nozzle inner wall surface, and the circumference of the first nozzle inner wall surface is gradually increased along the direction of being far away from the air chamber so as to form a first nozzle; and/or one end of the second nozzle component far away from the air chamber is provided with a second nozzle inner wall surface, and the circumference of the second nozzle inner wall surface is gradually increased along the direction far away from the air chamber so as to form a second nozzle; and/or the first nozzle part is used for being arranged on a cylinder of the circuit breaker; and/or the second spout member is adapted to be mounted on a draw bar of the circuit breaker.

Furthermore, the plurality of communication channels and the plurality of air cavities are distributed along the extending direction of the through holes respectively; the air cavities and the communication channels are arranged in a one-to-one correspondence mode, and air is introduced into the air cavities through the communication channels.

Further, the opening of the air cavity is positioned at one side of the air cavity close to the through hole; and/or the opening of the air cavity is communicated with one end of the communicating channel close to the through hole; and/or the air cavity extends along the extending direction of the through hole, and the opening of the air cavity is positioned on one side of the air cavity, which is far away from the air cavity; and/or the orientation of the air cavity opening is inclined to the extending direction of the through hole.

Further, the air cavity assembly includes: the air cavity components are arranged at intervals along the extending direction of the through holes, each air cavity component is provided with an air cavity, and a communicating channel communicated with the air cavity is formed between each air cavity component and the adjacent air cavity component positioned on one side of the air cavity component far away from the air cavity; the spout assembly is provided with a limiting bulge, and a communication channel communicated with the air chamber of the air chamber component is formed between the air chamber component positioned at one end far away from the air chamber in the plurality of air chamber components and the limiting bulge.

Furthermore, each air cavity component is of an annular structure, and a plurality of air cavity components are sequentially distributed to form through holes; and/or the air chambers and the air chamber openings of the air chamber components are arranged around the through holes; and/or three air cavity components.

According to the utility model discloses an on the other hand provides a circuit breaker, including moving contact subassembly and static contact assembly, the circuit breaker still includes: the nozzle structure is arranged on the moving contact component, the air cavity component of the nozzle structure is connected with the static arc contact of the static contact component in an air-tight mode, so that when the air cavity component is connected with the static arc contact, the connecting position between the air cavity component and the static arc contact is in a sealing state, and when the air cavity component is separated from the static arc contact, air in the air cavity of the air cavity component is sprayed out.

By applying the technical scheme of the utility model, the nozzle structure provided by the utility model comprises a nozzle component and an air cavity component, wherein the nozzle component is provided with an arc extinguishing channel for the penetration of a moving arc contact and a static arc contact of a circuit breaker; the air cavity assembly is arranged in the arc extinguishing channel, a first circulation gap is formed between the air cavity assembly and the inner wall surface of the arc extinguishing channel, and the first circulation gap is communicated with an air chamber of the circuit breaker; the air cavity component is provided with a through hole for the static arc contact or the dynamic arc contact of the circuit breaker to pass through, and the through hole is used for being communicated with the rod cavity of the pull rod of the circuit breaker; the air cavity component comprises an air cavity component, the air cavity component is provided with an air cavity, the air cavity component and the nozzle component are arranged at intervals to form a communicating channel, and the communicating channel is respectively communicated with the air cavity and the first circulating gap; the air cavity component has an air cavity opening communicating the through-bore with the air cavity. Through the spout structure of this application, remove at the pull rod to during the compression air chamber, produce electric arc, with the electric arc heating that is located the gas cavity through the production, at this moment, the electric arc and quiet arc contact of production can be plugged up the spout of spout subassembly, so that the gas pressure between quiet arc contact and the moving arc contact rises, thereby improve insulating ability, make the arc extinguishing extinguish, the problem that high voltage circuit breaker among the prior art has the ability of breaking electric arc less than is solved.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the scope of the invention. In the drawings:

fig. 1 shows a schematic structural diagram of a circuit breaker according to the present invention in which a moving arc contact and a stationary arc contact are in a closed state;

fig. 2 shows a schematic structural diagram of a moving arc contact and a stationary arc contact in a first switching state according to an embodiment of the circuit breaker of the present invention;

fig. 3 shows a schematic structural diagram of a moving arcing contact and a stationary arcing contact in a second switching state in accordance with an embodiment of the circuit breaker of the present invention;

fig. 4 shows a schematic structural view of a moving arc contact and a stationary arc contact in a third breaking state according to an embodiment of the circuit breaker of the present invention;

figure 5 shows a schematic structural view of a moving arcing contact and a stationary arcing contact in a fourth breaking state, according to an embodiment of the circuit breaker of the present invention;

figure 6 shows an enlarged schematic view of the spout assembly of the circuit breaker according to figure 1.

Wherein the figures include the following reference numerals:

10. a spout assembly; 100. an arc extinguishing channel; 11. a first spout member; 12. a second spouting member; 120. inserting the holes; 102. a second flow-through gap; 103. a clearance channel; 121. a first channel; 122. a communicating hole; 1201. a first bore section; 1202. a second bore section; 110. a first nozzle; 123. a second nozzle; 13. a limiting bulge; 20. an air cavity assembly; 21. an air cavity component; 200. perforating holes; 220. a communication channel; 221. a first communicating passage; 222. a second communicating passage; 223. a third communicating passage; 211. an air cavity opening; 210. an air cavity; 101. a first flow-through gap; 30. a moving contact assembly; 40. a stationary contact assembly; 1. a moving arc contact; 2. a stationary arc contact; 6. a stationary main contact; 9. a movable main contact; 3. an air chamber; 4. a pull rod; 400. an air outlet; 5. a cylinder; 50. a piston; 7. a first support; 8. a second support; 301. a first high pressure zone; 302. a second high pressure zone; 303. a third high pressure zone; 304. a fourth high pressure region.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

Referring to fig. 1 to 6, the present invention provides a nozzle structure, including: the ejector nozzle assembly 10 is provided with an arc extinguishing channel 100 for the penetration of a moving arc contact 1 and a static arc contact 2 of the circuit breaker; the air cavity assembly 20 is arranged in the arc extinguishing channel 100, a first circulation gap 101 is formed between the air cavity assembly 20 and the inner wall surface of the arc extinguishing channel 100, and the first circulation gap 101 is communicated with the air cavity 3 of the circuit breaker; the air cavity component 20 is provided with a through hole 200 for the static arc contact 2 or the moving arc contact 1 of the circuit breaker to pass through, and the through hole 200 is used for being communicated with the rod cavity of the pull rod 4 of the circuit breaker; the air cavity component 20 comprises an air cavity component 21, the air cavity component 21 is provided with an air cavity 210, the air cavity component 21 and the spout component 10 are arranged at intervals to form a communication channel 220, and the communication channel 220 is respectively communicated with the air cavity 210 and the first circulation gap 101; the air cavity member 21 has an air cavity opening 211 communicating the through hole 200 and the air cavity 210.

The utility model provides a nozzle structure, which comprises a nozzle component 10 and an air cavity component 20, wherein the nozzle component 10 is provided with an arc extinguishing channel 100 for a moving arc contact 1 and a static arc contact 2 of a circuit breaker to penetrate; the air cavity assembly 20 is arranged in the arc extinguishing channel 100, a first circulation gap 101 is formed between the air cavity assembly 20 and the inner wall surface of the arc extinguishing channel 100, and the first circulation gap 101 is communicated with the air chamber 3 of the circuit breaker; the air cavity component 20 is provided with a through hole 200 for the static arc contact 2 or the moving arc contact 1 of the circuit breaker to pass through, and the through hole 200 is used for being communicated with the rod cavity of the pull rod 4 of the circuit breaker; the air cavity component 20 comprises an air cavity component 21, the air cavity component 21 is provided with an air cavity 210, the air cavity component 21 and the nozzle component 10 are arranged at intervals to form a communication channel 220, and the communication channel 220 is respectively communicated with the air cavity 210 and the first circulation gap 101; the air cavity member 21 has an air cavity opening 211 communicating the through hole 200 and the air cavity 210. Through the spout structure of this application, move at pull rod 4, and during compression air chamber 3, produce electric arc, with the electric arc heating that is located the gas in air cavity 210 through the production, at this moment, the electric arc that produces and quiet arc contact 2 can plug up the spout of spout subassembly 10, so that the gas pressure between quiet arc contact 2 and the movable arc contact 1 rises, thereby improve insulating ability, make the arc extinguishing, the problem that high voltage circuit breaker among the prior art has the ability of breaking electric arc to be more weak is solved.

Specifically, the spout assembly 10 further includes: a first spouting member 11, an arc extinguishing channel 100 being provided on the first spouting member 11; a second nozzle member 12 having an insertion hole 120 for inserting a moving arc contact 1 and a stationary arc contact 2 of the circuit breaker, at least a part of the second nozzle member 12 being located in the arc extinguishing passage 100, and a second flow gap 102 being provided between an outer surface of the first nozzle member 11 and an inner wall surface of the arc extinguishing passage 100; wherein, the air cavity component 20 is located at one side of the second spout component 12 far away from the air chamber 3, the first circulation gap 101 is communicated with the second circulation gap 102 to jointly form a gap channel 103, and a first channel 121 for communicating the gap channel 103 and the through hole 200 is formed between the air cavity component 20 and the second spout component 12.

Specifically, the circuit breaker still includes first support 7, second support 8, quiet main contact 6, moves main contact 9 and cylinder 5, and first support 7 is connected with quiet main contact 6 and quiet arc contact 2, and second support 8 is connected with cylinder 5, as shown in fig. 1, in the embodiment of the utility model discloses a when moving arc contact 1 and quiet arc contact 2 are located the combined floodgate state, moving arc contact 1 and quiet arc contact 2 contact, the electric current flows through first support 7-quiet main contact 6-moves main contact 9-cylinder 5-second support 8 in proper order. The space between the moving arc contact 1 and the static arc contact 2 in the arc extinguishing channel 100 is normal pressure.

In the embodiment of the present invention, the second nozzle part 12 is provided with the communication hole 122, and both ends of the communication hole 122 are respectively communicated with the second circulation gap 102 and the first passage 121. Thus, the insulating gas can be injected to the outside through the communication hole 122 to cross the gas of other channels of the nozzle structure to increase the pressure.

Specifically, the center line of the communication hole 122 is inclined to the center line of the through hole 200, and the outlet of the communication hole 122 is inclined to the side of the second spouting member 12 near the air cavity assembly 20; and/or the inserting hole 120 comprises a first hole section 1201 and a second hole section 1202, the minimum inserting cross section of the first hole section 1201 is larger than that of the second hole section 1202, and the axis of the pull rod 4 is positioned on the inserting cross section; the first hole section 1201 is used for inserting the moving arc contact 1, the second hole section 1202 is used for passing the static arc contact 2, and at least part of the inner wall surface of the second hole section 1202 is matched with the outer wall surface of the static arc contact 2. The insertion cross section is a cross section perpendicular to the insertion direction of the fixed arc contact 2.

Specifically, the inner wall surface of the second hole section 1202 is clearance-fitted with the outer wall surface of the stationary arc contact 2.

Specifically, one end of the first nozzle part 11, which is away from the plenum 3, has a first nozzle inner wall surface whose circumference gradually increases in a direction away from the plenum 3 to form the first nozzle 110; and/or one end of the second nozzle part 12 away from the plenum 3 has a second nozzle inner wall surface whose circumference gradually increases in a direction away from the plenum 3 to form a second nozzle 123; and/or the first spouting member 11 for installing on the cylinder 5 of the circuit breaker; and/or the second spout member 12 is adapted to be mounted on the draw bar 4 of the circuit breaker. Wherein the axis of the static arc contact 2 is positioned on the section of the nozzle.

Specifically, the cylinder 5 includes a cylinder body and a piston 50 such that the cylinder body and the piston 50 enclose a sealed air chamber 3.

Specifically, the circumferential areas of the first and second nozzle orifices 110 and 123 gradually increase in a direction away from the gas chamber 3.

Specifically, the number of the communication passages 220 and the number of the air cavities 210 are multiple, and the plurality of communication passages 220 and the plurality of air cavities 210 are distributed along the extending direction of the through holes 200 respectively; wherein, a plurality of air cavities 210 and a plurality of communicating channels 220 are arranged in one-to-one correspondence, so as to introduce air into the air cavities 210 through each communicating channel 220.

In the embodiment of the present invention, the air cavity opening 211 is located at one side of the air cavity 210 near the through hole 200; and/or the air cavity opening 211 is communicated with one end of the communicating channel 220 close to the through hole 200; and/or the air cavity 210 extends along the extending direction of the through hole 200, and the air cavity opening 211 is positioned at one side of the air cavity 210 far away from the air cavity 3; and/or the orientation of the air cavity opening 211 is oblique to the direction of extension of the through going hole 200.

Specifically, air cavity assembly 20 includes: the air cavity components 21 are arranged at intervals along the extending direction of the through holes 200, each air cavity component 21 is provided with an air cavity 210, and a communicating channel 220 communicated with the air cavity 210 is formed between each air cavity component 21 and the adjacent air cavity component 21 positioned on one side, far away from the air cavity 3, of each air cavity component 21; wherein, the spout assembly 10 has a stopper protrusion 13, and a communication passage 220 communicating with the air chamber 3 of the air chamber part 21 is formed between the stopper protrusion 13 and the air chamber part 21 of the plurality of air chamber parts 21 located at an end away from the air chamber 3.

In the embodiment of the present invention, each air cavity component 21 is an annular structure, and a plurality of air cavity components 21 are sequentially distributed to form through holes 200; and/or the air chamber 3 and the air chamber opening 211 of each air chamber component 21 are arranged around the through hole 200; and/or the air chamber part 21 is three so as to be provided with a first communicating channel 221, a second communicating channel 222 and a third communicating channel 223 in this order in a direction away from the air chamber 3.

The utility model discloses an in the separating brake process of quiet arcing contact 2 and moving arc contact 1 of embodiment, as shown in fig. 2, pull rod 4 moves along the direction of keeping away from first support 7, and the gas in the air chamber 3 of piston 50 compressed cylinder 5, gas flow out through first circulation clearance 101 and first passageway 121, collects in second spout 123 department, produces first high pressure district 301, and other intercommunication passageways 220 are blockked up by quiet arcing contact 2, and the air current can not pass through.

As shown in fig. 3, the opening is further performed, the pull rod 4 continues to move in the direction away from the first support 7, the first communicating passage 221 is exposed, and the gas flow from the first communicating gap 101 flows through the first passage 121 and the first communicating passage 221, so that the high-pressure region is expanded to form the second high-pressure region 302, and simultaneously the gas in the gas chamber 210 is expanded by the arc heating, but the first nozzle 110 of the first nozzle part 11 is blocked by the arc, so that the pressure is raised.

As shown in fig. 4, as the pull rod 4 further moves, the second communication passage 222 and the third communication passage 223 are sequentially opened to form a larger high pressure region to form a third high pressure region 303, and at the same time, the gas in the gas chambers 210 of the respective gas chamber parts 21 is heated and expanded by the electric arc, but the first spouts 110 of the first spout parts 11 are blocked by the electric arc, thereby further increasing the pressure; as shown in fig. 5, when the first nozzle 110 is separated from the stationary arc contact 2, a fourth high pressure region 304 is formed, and at this time, a part of gas flows out from the first nozzle 110 to take away heat, and the gas in the gas chambers 210 of the gas chamber components 21 is blown out, so that the pressure between the moving arc contact 1 and the stationary arc contact 2 is increased, the insulating property is improved, and arc extinction is achieved.

Specifically, the pull rod 4 is provided with an air outlet 400, so that when the pull rod 4 moves to a preset position and at least part of the air outlet 400 is positioned on one side of the second support 8 far away from the cylinder 5, at least part of the air outlet 400 is positioned on the outer side at the moment, part of the insulating gas is discharged through the air outlet 400, and part of the arc heat is taken away.

Specifically, the number of the air outlet holes 400 is plural, and the plural air outlet holes 400 are arranged at intervals along the extending direction of the pull rod 4.

The utility model also provides a circuit breaker, including moving contact subassembly 30 and static contact subassembly 40, the circuit breaker still includes: the nozzle structure is installed on the moving contact component 30.

Specifically, the movable contact assembly 30 includes a moving arc contact and a moving main contact, and the stationary contact assembly 40 includes a stationary arc contact and a stationary main contact.

To sum up, can improve the gas pressure between quiet arc contact and the moving arc contact through the spout structure of this application to improve insulating ability, like this, it is higher when breaking direct current voltage, and the electric current is less, can effectively improve the ability of breaking direct current electric arc through the spout structure of this application, simultaneously, the spout structure of this application also has the ability of breaking to the alternating current.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the utility model provides a nozzle structure, which comprises a nozzle component 10 and an air cavity component 20, wherein the nozzle component 10 is provided with an arc extinguishing channel 100 for a moving arc contact 1 and a static arc contact 2 of a circuit breaker to penetrate; the air cavity assembly 20 is arranged in the arc extinguishing channel 100, a first circulation gap 101 is formed between the air cavity assembly 20 and the inner wall surface of the arc extinguishing channel 100, and the first circulation gap 101 is communicated with the air chamber 3 of the circuit breaker; the air cavity component 20 is provided with a through hole 200 for the static arc contact 2 or the dynamic arc contact 1 of the circuit breaker to pass through, and the through hole 200 is used for being communicated with the rod cavity of the pull rod 4 of the circuit breaker; the air cavity component 20 comprises an air cavity component 21, the air cavity component 21 is provided with an air cavity 210, the air cavity component 21 and the spout component 10 are arranged at intervals to form a communication channel 220, and the communication channel 220 is respectively communicated with the air cavity 210 and the first circulation gap 101; the air cavity member 21 has an air cavity opening 211 communicating the through hole 200 and the air cavity 210. Through the spout structure of this application, move at pull rod 4, and during compression air chamber 3, produce electric arc, with the electric arc heating through the production is located the gas in air cavity 210, at this moment, the electric arc that produces and quiet arc contact 2 can plug up the spout of spout subassembly 10, so that the gas pressure between quiet arc contact 2 and the moving arc contact 1 rises, thereby improve insulating ability, make the arc extinguishing, the problem that high voltage circuit breaker among the prior art has the ability of breaking electric arc to be more weak has been solved.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A spout structure, comprising:

the nozzle assembly (10) is provided with an arc extinguishing channel (100) for the penetration of a moving arc contact (1) and a static arc contact (2) of the circuit breaker;

the air cavity assembly (20) is arranged in the arc extinguishing channel (100), a first circulation gap (101) is formed between the air cavity assembly (20) and the inner wall surface of the arc extinguishing channel (100), and the first circulation gap (101) is communicated with an air cavity (3) of the circuit breaker; the air cavity assembly (20) is provided with a through hole (200) for a static arc contact (2) or a moving arc contact (1) of the circuit breaker to pass through, and the through hole (200) is used for being communicated with a rod cavity of a pull rod (4) of the circuit breaker;

the air cavity component (20) comprises an air cavity component (21), the air cavity component (21) is provided with an air cavity (210), the air cavity component (21) and the nozzle component (10) are arranged at intervals to form a communication channel (220), and the communication channel (220) is respectively communicated with the air cavity (210) and the first circulation gap (101); the air cavity component (21) has an air cavity opening (211) communicating the through-going hole (200) and the air cavity (210).

2. A spout structure according to claim 1, wherein the spout assembly (10) further comprises:

a first spouting member (11), the arc extinguishing channel (100) being provided on the first spouting member (11);

a second nozzle member (12) having an insertion hole (120) for inserting a moving arc contact (1) and a stationary arc contact (2) of the circuit breaker, at least a part of the second nozzle member (12) being located in the arc extinguishing channel (100), and a second flow gap (102) being provided between an outer surface of the first nozzle member (11) and an inner wall surface of the arc extinguishing channel (100);

wherein the air cavity component (20) is positioned on one side of the second nozzle component (12) far away from the air chamber (3), the first circulation gap (101) is communicated with the second circulation gap (102) to jointly form a gap channel (103), and a first channel (121) for communicating the gap channel (103) with the through hole (200) is formed between the air cavity component (20) and the second nozzle component (12).

3. A spout structure according to claim 2, wherein a communication hole (122) is provided on the second spouting member (12), and both ends of the communication hole (122) communicate with the second flowing gap (102) and the first passage (121), respectively.

4. A spout structure according to claim 3, wherein a hole center line of the communication hole (122) is inclined to a hole center line of the through hole (200), and an outlet of the communication hole (122) is inclined to a side of the second spout member (12) close to the air chamber assembly (20); and/or the presence of a gas in the atmosphere,

the insertion hole (120) comprises a first hole section (1201) and a second hole section (1202), and the minimum insertion cross section of the first hole section (1201) is larger than that of the second hole section (1202); the first hole section (1201) is used for inserting the moving arc contact (1), the second hole section (1202) is used for allowing the static arc contact (2) to penetrate through, and at least part of the inner wall surface of the second hole section (1202) is matched with the outer wall surface of the static arc contact (2).

5. The spout structure of claim 2,

one end of the first nozzle component (11) far away from the air chamber (3) is provided with a first nozzle (110) inner wall surface, and the circumference of the first nozzle inner wall surface is gradually increased along the direction far away from the air chamber (3) to form a first nozzle (110); and/or

One end of the second nozzle component (12) far away from the air chamber (3) is provided with a second nozzle inner wall surface, and the circumference of the second nozzle inner wall surface is gradually increased along the direction far away from the air chamber (3) to form a second nozzle (123); and/or

The first nozzle component (11) is used for being installed on a cylinder (5) of the circuit breaker; and/or

The second nozzle component (12) is used for being installed on a pull rod (4) of the circuit breaker.

6. The spout structure of any one of claims 1 to 5, wherein the communication channel (220) and the air chamber (210) are plural, and the plural communication channels (220) and the plural air chambers (210) are respectively distributed along the extending direction of the through hole (200); the air cavities (210) and the communication channels (220) are arranged in a one-to-one correspondence mode, and air is introduced into the air cavities (210) through the communication channels (220).

7. The spout structure of any one of claims 1 to 5,

the air cavity opening (211) is positioned on one side of the air cavity (210) close to the through hole (200); and/or

The air cavity opening (211) is communicated with one end, close to the through hole (200), of the communication channel (220); and/or

The air cavity (210) extends along the extending direction of the through hole (200), and the air cavity opening (211) is positioned on one side, far away from the air chamber (3), of the air cavity (210); and/or

The orientation of the air cavity opening (211) is inclined to the extending direction of the through hole (200).

8. The spout structure of any one of claims 1 to 5 wherein the air cavity assembly (20) comprises:

the air cavity components (21) are arranged at intervals along the extending direction of the through holes (200), each air cavity component (21) is provided with an air cavity (210), and a communication channel (220) communicated with the air cavity (210) is formed between each air cavity component (21) and the adjacent air cavity component (21) on one side far away from the air chamber (3);

wherein the spout assembly (10) is provided with a limiting protrusion (13), and the communication channel (220) communicated with the air chamber (3) of the air chamber component (21) is formed between the air chamber component (21) at one end far away from the air chamber (3) in the plurality of air chamber components (21) and the limiting protrusion (13).

9. The spout structure of claim 8,

each air cavity component (21) is of an annular structure, and a plurality of air cavity components (21) are sequentially distributed to form the through holes (200); and/or

The air chamber (3) and the air chamber opening (211) of each air chamber component (21) are arranged around the through hole (200); and/or

The number of the air cavity components (21) is three.

10. A circuit breaker comprising a movable contact assembly (30) and a stationary contact assembly (40), characterized in that it further comprises:

the spouting structure of any one of claims 1 to 9, said spouting structure being installed on said movable contact assembly (30), an air chamber part (21) of said spouting structure being connected air-tightly with a stationary arc contact (2) of said stationary contact assembly (40), so that a connection position between said air chamber part (21) and said stationary arc contact (2) is in a sealed state when said air chamber part (21) and said stationary arc contact (2) are in a connected state, and air in an air chamber (210) of said air chamber part (21) is ejected when said air chamber part (21) is separated from said stationary arc contact (2).

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