CN112735902A

CN112735902A - Arc extinguish chamber of high-voltage circuit breaker for rail transit vehicle control circuit

Info

Publication number: CN112735902A
Application number: CN202011496571.0A
Authority: CN
Inventors: 张春玲; 童来奇; 周华山
Original assignee: Chuzhou Bogwell Electric Co ltd
Current assignee: Chuzhou Bogwell Electric Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-04-30

Abstract

The invention discloses an arc extinguish chamber of a high-voltage circuit breaker for a control circuit of a rail transit vehicle, which relates to the field of circuit breakers and comprises an arc extinguish chamber body, wherein the arc extinguish chamber body comprises a first side wall, a second side wall and a plurality of ribs which are arranged on the first side wall and the second side wall and are made of an anti-arc insulating material, the ribs are staggered with each other, electric arcs are longitudinally and transversely elongated and cooled after entering the arc extinguish chamber by arranging an upper electric arc runner, a lower electric arc runner and the staggered ribs, an electromagnetic blow-out coil is arranged and electrified, a magnetic field which is vertical to an electric arc path is provided for a pole shoe, the magnetic field reacts with the magnetic field around the electric arcs to generate resultant force, the resultant force drives the electric arcs at high speed along the runners, so that the electric arcs are accelerated to move towards the inside of the arc extinguish chamber, and the electric arcs are accelerated to be elongated and cooled in a plurality of zigzag channels which are formed, And (4) extinguishing.

Description

Arc extinguish chamber of high-voltage circuit breaker for rail transit vehicle control circuit

Technical Field

The invention relates to the field of circuit breakers, in particular to an arc extinguish chamber of a high-voltage circuit breaker for a control circuit of a rail transit vehicle.

Background

The explosion chamber that all can set up among the high voltage circuit breaker among the current track traffic, prevent the circuit breaker inefficacy, cause the potential safety hazard, commonly used have bars piece and air blow type, though can realize the arc extinguishing, but all there is not enough, bars piece formula explosion chamber, electric arc gets into the back and can't obtain the rapid stretching, cause arc extinguishing time long, electric arc stays for a long time in the circuit breaker, extinguish at a slow speed, do not in time extinguish, and air blow type explosion chamber, though can accelerate electric arc to extinguish, nevertheless often exhaust not smoothly arouse electric arc reignition easily, breakdown or burn out the circuit breaker, therefore, need provide an explosion chamber solution above-mentioned problem of high voltage circuit breaker for track traffic vehicle control circuit.

Disclosure of Invention

In order to solve the technical problems, the invention provides the following technical scheme:

an arc extinguish chamber of a high-voltage circuit breaker for a control circuit of a rail transit vehicle comprises an arc extinguish chamber body, the arc extinguish chamber body comprises a first side wall, a second side wall and a plurality of ribs, wherein the first side wall and the second side wall are made of arc-resistant insulating materials, the ribs are arranged on the first side wall and the second side wall, the ribs are staggered, the upper edge and the lower edge of the arc extinguish chamber are also provided with a pair of conductive upper arc runner and lower arc runner, the upper arc runner comprises a first runner, a second runner and a third runner which are connected end to end, two insulation spacers I are arranged among the three parts, the flow channel I closest to the arc starting area is in a U shape, and the U-shaped area is provided with a first electromagnetic blow-out coil, one end of the first electromagnetic blow-out coil is connected to the innermost end of the first flow channel, an electromagnetic blow-out coil II and an electromagnetic blow-out coil III are further arranged on the upper arc runner, and two ends of the electromagnetic blow-out coil II and the two ends of the electromagnetic blow-out coil III are respectively connected to two sides of the two different insulation spacers I;

the lower arc runner comprises a runner four, a runner five and a runner six which are connected end to end, two insulation spacers two are arranged between the runner four, the runner five and the runner six, the runner four which is closest to an arc starting area is U-shaped, an area of the U-shaped runner is provided with an electromagnetic blow-out coil four, one end of the electromagnetic blow-out coil four is connected to the four inner ends of the runner, the four lower ends of the runner are provided with insulation spacers, the lower arc runner is further provided with an electromagnetic blow-out coil five and an electromagnetic blow-out coil six, and two ends of the two are respectively connected to two sides of the two insulation spacers.

Preferably, the first electromagnetic blowout coil, the second electromagnetic blowout coil, the third electromagnetic blowout coil, the fourth electromagnetic blowout coil, the fifth electromagnetic blowout coil and the sixth electromagnetic blowout coil are respectively provided with a centrally positioned core insulated from the first electromagnetic blowout coil, and are attached to pole shoes arranged on the outer surfaces of the side walls.

Preferably, a first panel and a second panel which are bonded are arranged on the opposite sides of the lower arc runner, and the first panel and the second panel are respectively clamped between the lateral edge of the lower arc runner and the first side wall and the second side wall.

Preferably, the first panel and the second panel are coated with an aluminum oxide coating.

Preferably, the first flow channel, the second flow channel, the third flow channel, the fourth flow channel, the fifth flow channel and the sixth flow channel are made of brass, and the surfaces of the first flow channel, the second flow channel, the third flow channel, the fourth flow channel, the fifth flow channel and the sixth flow channel, which are exposed to the electric arc, are coated with refractory metal layers.

Preferably, the refractory metal layer is an aluminum layer or a tungsten layer.

The invention has the beneficial effects that: the invention makes the electric arc cooled by lengthways and crosswise elongation after entering the arc extinguish chamber body by arranging the upper electric arc runner, the lower electric arc runner and the mutually staggered ribs, makes the pole shoe provide a magnetic field vertical to the electric arc path by arranging the electromagnetic blow-out coil and electrifying the electromagnetic blow-out coil, and makes the magnetic field react with the magnetic field around the electric arc, thereby generating resultant force which drives the electric arc along the runner at high speed, thereby accelerating the electric arc to move to the inner part of the arc extinguish chamber body, accelerating the electric arc to be elongated, cooled and extinguished in a plurality of zigzag channels formed by the upper electric arc runner, the lower electric arc runner and the mutually staggered ribs, and accelerating the arc extinction.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a cross-sectional view taken along line 2-2 of fig. 1.

Fig. 3 is a cross-sectional view taken along line 3-3 of fig. 1.

FIG. 4 is a schematic structural diagram of a first flow channel according to the present invention.

Fig. 5 is a cross-sectional view taken along line 5-5 of fig. 1.

Wherein, 20-arc extinguish chamber body, 21-side wall one, 22-side wall two, 23-rib, 30-upper arc runner, 31-lower arc runner, 32-runner one, 33-runner two, 34-runner three, 36-insulation spacer one, 40-electromagnetic blow-out coil one, 41-adapter, 37-electromagnetic blow-out coil two, 38-electromagnetic blow-out coil three, 49-runner four, 50-runner five, 51-runner six, 52-insulation spacer two, 45-electromagnetic blow-out coil four, 57-insulation spacer, 46-electromagnetic blow-out coil five, 47-electromagnetic blow-out coil six, 59-core one, 61-pole shoe one, 62-core two, 63-pole shoe two, 80-panel one, 81-panel two, 83-alumina coating, 65-refractory metal layer, region 70-B.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

Examples

As shown in fig. 1 to 5, an arc extinguish chamber of a high voltage circuit breaker for a control circuit of a rail transit vehicle comprises an arc extinguish chamber body 20, wherein the arc extinguish chamber body 20 comprises a first side wall 21, a second side wall 22 and a plurality of ribs 23 arranged on the first side wall 21 and the second side wall 22, the ribs 23 are mutually staggered, a pair of conductive upper arc runner 30 and a lower arc runner 31 are further arranged at the upper edge and the lower edge of the arc extinguish chamber 20, the upper arc runner 30 comprises a first runner 32, a second runner 33 and a third runner 34 which are connected end to end, two first insulating spacers 36 are arranged between the first runner 32 and the third runner 34, the first runner 32 closest to an arc starting area is in a U shape, an electromagnetic blowout coil 40 is arranged in the U-shaped area, one end of the electromagnetic blowout coil 40 is connected with a conductive component in the circuit breaker for electrifying the first runner 32, and the other end is connected with the innermost, the upper arc runner 30 is further provided with a second electromagnetic blowout coil 37 and a third electromagnetic blowout coil 38, two ends of the two electromagnetic blowout coils are respectively connected to two sides of the first two different insulating spacers 36, and the first electromagnetic blowout coil 40, the second electromagnetic blowout coil 37, the third electromagnetic blowout coil 38, the first runner 32, the second runner 33 and the third runner 34 are connected in series;

the lower arc runner 31 comprises a runner four 49, a runner five 50 and a runner six 51 which are connected end to end, two insulating spacers two 52 are arranged between the runner four 49, the runner five 50 and the runner six 51, the runner four 49 closest to an arc starting area is U-shaped, an electromagnetic blow-out coil four 45 is arranged in the U-shaped area, one end of the electromagnetic blow-out coil four 45 is connected with another conductive part in the circuit breaker to electrify the other conductive part, the other end of the electromagnetic blow-out coil four 45 is connected with the inner end of the runner four 49, an insulating spacer 57 is arranged at the lower end of the runner four 49, an electromagnetic blow-out coil five 46 and an electromagnetic blow-out coil six 47 are further arranged on the lower arc runner 31, two ends of the electromagnetic blow-out coil four 45 and the electromagnetic blow-out coil five 46 are respectively connected to two sides of the two different insulating spacers two 52, and the.

In the present embodiment, the electromagnetic blow-out coil one 40, the electromagnetic blow-out coil two 37, the electromagnetic blow-out coil three 38, the electromagnetic blow-out coil four 45, the electromagnetic blow-out coil five 46 and the electromagnetic blow-out coil six 47 are each provided with a centrally located core insulated therefrom and attached to a pole piece mounted on the outer surface of the side wall one 21, for example, the electromagnetic blow-out coil one 40 has a core one 59, the core one 59 is attached to a pole piece one 61 shown by a broken line in fig. 1, and the electromagnetic blow-out coil two 37 is provided with a core two 62 and attached to a pole piece two 63 shown by a broken line in fig. 1.

In this embodiment, the opposite sides of the lower arc runner 31 are provided with a first bonded panel 80 and a second bonded panel 81, and the first bonded panel 80 and the second bonded panel 81 are respectively sandwiched between the lateral edges of the lower arc runner 31 and the first and

second sidewalls

21 and 22.

In this embodiment, the first panel 80 and the second panel 81 are coated with the alumina coating 83, which can improve the current blocking capability of the arc extinguish chamber 20, and the first panel 80 and the second panel 81 are made of mica, which has a very high resistivity and is not affected even if the humidity of the surrounding air is high.

In this embodiment, the first flow channel 32, the second flow channel 33, the third flow channel 34, the fourth flow channel 49, the fifth flow channel 50 and the sixth flow channel 51 are made of brass, and the surfaces exposed to the arc are coated with a refractory metal layer 65.

In the present embodiment, the refractory metal layer 65 is an aluminum layer or a tungsten layer, and since the arc exposure is greater in the B region 70 in fig. 4, the aluminum layer or the tungsten layer of the B region 70 is thicker than other regions.

After an arc is generated in the high-voltage circuit breaker, when the arc enters the arc extinguishing chamber body 20 near the position indicated by the dotted line 29, by arranging the upper arc runner 30 and the lower arc runner 31 and energizing the electromagnetic blow-out coil at the same time, the pole shoe provides a magnetic field perpendicular to the arc path, and the magnetic field reacts with the magnetic field around the arc, so that resultant force is generated, the resultant force drives the arc along the runners at high speed, thereby accelerating the arc to move towards the inside of the arc extinguishing chamber body 20, and accelerating the arc to be elongated and cooled and extinguished in a plurality of zigzag channels formed by the areas of the upper arc runner 30 and the lower arc runner 31 and the mutually staggered ribs 23.

It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.

Claims

1. The utility model provides an explosion chamber of high voltage circuit breaker for rail transit vehicle control circuit, its characterized in that includes explosion chamber body (20), explosion chamber body (20) include by anti electric arc insulating material constitution lateral wall one (21), lateral wall two (22) and several set up rib (23) on lateral wall one (21), lateral wall two (22), just rib (23) crisscross each other, the upper and lower edge of explosion chamber (20) still is equipped with a pair of electrically conductive last electric arc runner (30) and lower electric arc runner (31), go up electric arc runner (30) and include runner one (32), runner two (33) and runner three (34) of end to end connection, and be equipped with two insulating spacer one (36) between the three, runner one (32) that is closest to the electric arc initial region is the U-shaped, and its U-shaped region is equipped with electromagnetism and blows off coil one (40), blow off electromagnetism coil one (40) one end is connected to the innermost of runner one (32), the upper arc runner (30) is also provided with a second electromagnetic blow-out coil (37) and a third electromagnetic blow-out coil (38), and two ends of the two are respectively connected to two sides of the first two different insulating spacers (36);

lower arc runner (31) is equipped with two insulating spacers two (52) including runner four (49), runner five (50) and runner six (51) and the three of end to end connection, and runner four (49) nearest the electric arc initial region is the U-shaped, and its U-shaped region is equipped with electromagnetism blow off coil four (45), electromagnetism blow off coil four (45) one end is connected to runner four (49) inner, runner four (49) lower extreme is equipped with insulating barrier (57), still be equipped with electromagnetism blow off coil five (46) and electromagnetism blow off coil six (47) down on arc runner (31), and the both ends of the two are connected to the both sides of two different insulating spacers two (52) respectively.

2. The arc extinguish chamber of the high-voltage circuit breaker for the control circuit of the rail transit vehicle as set forth in claim 1, wherein: the electromagnetic blow-out coil I (40), the electromagnetic blow-out coil II (37), the electromagnetic blow-out coil III (38), the electromagnetic blow-out coil IV (45), the electromagnetic blow-out coil V (46) and the electromagnetic blow-out coil VI (47) are all provided with a center-positioned core insulated from the center-positioned core and attached to pole shoes arranged on the outer surfaces of the side wall I (21).

3. The arc extinguish chamber of the high-voltage circuit breaker for the control circuit of the rail transit vehicle as set forth in claim 2, wherein: and a first panel (80) and a second panel (81) which are bonded are arranged on the opposite sides of the lower arc runner (31), and the first panel (80) and the second panel (81) are respectively clamped between the lateral edge of the lower arc runner (31) and the first side wall (21) and the second side wall (22).

4. The arc extinguish chamber of the high-voltage circuit breaker for the control circuit of the rail transit vehicle as set forth in claim 3, wherein: and the first panel (80) and the second panel (81) are coated with an aluminum oxide coating (83).

5. The arc extinguish chamber of the high-voltage circuit breaker for the control circuit of the rail transit vehicle as set forth in claim 1, wherein: the first flow channel (32), the second flow channel (33), the third flow channel (34), the fourth flow channel (49), the fifth flow channel (50) and the sixth flow channel (51) are made of brass, and the surfaces of the first flow channel (32), the second flow channel (33), the third flow channel (34), the fourth flow channel (49), the fifth flow channel (50) and the sixth flow channel (51) exposed to the electric arc.

6. The arc extinguish chamber of the high-voltage circuit breaker for the control circuit of the rail transit vehicle as set forth in claim 5, wherein: the refractory metal layer (65) is an aluminum layer or a tungsten layer.