CN217822646U - Exhaust arc extinguishing structure of residual current circuit breaker - Google Patents
Exhaust arc extinguishing structure of residual current circuit breaker Download PDFInfo
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- CN217822646U CN217822646U CN202222091193.9U CN202222091193U CN217822646U CN 217822646 U CN217822646 U CN 217822646U CN 202222091193 U CN202222091193 U CN 202222091193U CN 217822646 U CN217822646 U CN 217822646U
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- circuit breaker
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Abstract
The utility model provides an exhaust arc extinguishing structure of electric leakage circuit breaker, which belongs to the technical field of circuit breakers and comprises an arc extinguishing installation cavity and an exhaust cavity, wherein a partition plate is arranged between the arc extinguishing installation cavity and the exhaust cavity, a plurality of exhaust holes are arranged on the partition plate, the exhaust cavity is provided with a first exhaust port and a second exhaust port, a plurality of convex strips are arranged on the inner walls of a first shell and a second shell corresponding to the arc extinguishing installation cavity to form a gas channel, and an arc leading groove communicated with the gas channel is arranged on the other side of the arc extinguishing installation cavity; the utility model discloses at the exhaust in-process, can produce the atmospheric pressure difference between explosion chamber and the exhaust cavity, realize quick exhaust, the exhaust cavity is provided with two gas vents and with the spigot surface of ionized gas direction gas vent, promotion exhaust efficiency that can be very big improves the breaking capacity and the safety in utilization of circuit breaker moreover.
Description
Technical Field
The utility model relates to a circuit breaker technical field, concretely relates to exhaust arc extinguishing structure of electric leakage circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The arc extinguishing chamber is an important component of the circuit breaker, and has an especially important influence on the arc extinguishing performance.
When the breaker breaks off large current, electric arcs with extremely high temperature and strong light can be generated between the moving contact and the static contact of the contact mechanism, and if the electric arcs cannot be rapidly cooled and extinguished, the internal parts of the breaker such as the contact mechanism and the like are easily burnt; the circuit breaker introduces electric arc into the arc extinguish chamber through the arc striking sheet, and the electric arc is cooled and extinguished in the arc extinguish chamber to generate high-temperature and high-pressure ionized gas.
Generally set up the exhaust hole among the prior art on the arc extinguishing cover of explosion chamber or set up exhaust passage on the casing lateral wall that the explosion chamber corresponds and come the ionized gas exhaust explosion chamber to only be provided with an gas vent that is linked together with the outside usually and come the exhaust, but the exhaust effect of this structure is not good, and especially when breaking disconnected heavy current, produces the unable quick discharge of a large amount of warm high pressure ionized gas, leads to the explosion chamber arc extinguishing effect to descend easily, thereby influences the breaking performance of circuit breaker.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming the shortcoming and not enough that prior art exists, and provide a leakage circuit breaker's exhaust arc extinguishing structure.
The utility model discloses the technical scheme who takes as follows: the utility model provides an exhaust arc extinguishing structure of residual-current circuit breaker, includes first casing and the second casing to closing the formation cavity, the cavity is including arc extinguishing installation cavity, arc extinguishing installation cavity one side is provided with the exhaust cavity, be provided with the division board between arc extinguishing installation cavity and the exhaust cavity, be provided with a plurality of exhaust holes on the division board, the exhaust cavity is provided with first gas vent and second gas vent, the opposite exhaust cavity lateral wall in exhaust hole is provided with and is used for leading first leading surface and the second leading surface of first gas vent and second gas vent respectively with gas, the first casing that arc extinguishing installation cavity corresponds is provided with a plurality of sand grips with second shells inner wall and constitutes gas passage, the opposite side of arc extinguishing installation cavity be provided with the arc chute of gas passage intercommunication.
The division board is including being located first division board on the first casing and being located second division board on the second casing, the exhaust hole is including setting up the first exhaust groove on first division board and setting up the second exhaust groove on the second division board, first exhaust groove and second exhaust groove dislocation set.
The exhaust hole further comprises a vent hole arranged on the first partition plate and the second partition plate, and the vent hole is located at the projection position of the gas channel on the first partition plate and the second partition plate.
And the butt joint end faces of the first partition plate and the second partition plate are provided with adaptive butt joint steps.
And an arc isolating area is arranged at the second exhaust port, and an arc isolating sheet is arranged in the arc isolating area.
Still including setting up the explosion chamber in the arc extinguishing installation cavity, the explosion chamber includes a plurality of arc extinguishing bars piece that are separated by a determining deviation and parallel arrangement of each other and is used for connecting the stationary blade of each arc extinguishing bars piece, and it still includes at least one striking inserted sheet, the striking inserted sheet is including two arc ends of leading that can insert between the arc extinguishing bars piece and the striking end that is used for leading electric arc to the arc end, two lead two arc extinguishing bars pieces of being separated by between the arc end.
The arc striking inserted sheet is the electrically conductive material shaping of bending, and it is still including having elastic bending end, bending end makes two lead and has adjustable elasticity contained angle between the arc end, the elasticity contained angle provides elasticity resilience force for two arc ends and makes it connect on the arc extinguishing bars piece.
The bending end is provided with at least one vent hole.
Arc extinguishing bars piece including V type opening, with recess and the lug of setting in the recess that the stationary blade is connected, the stationary blade is fixed in the recess, the stationary blade is including the joint mouth that is connected with the lug of every arc extinguishing bars piece, the arc end of leading of striking inserted sheet be provided with the logical groove of V type opening intercommunication.
The arc extinguishing chamber is characterized by further comprising a first arc striking plate, a second arc striking plate and a fixed contact, wherein the first arc striking plate and the second arc striking plate are arranged on two sides of the arc extinguishing chamber, the fixed contact extends to form an arc striking angle, and one end of the first arc striking plate is located in the arc striking angle.
The utility model has the advantages as follows: the utility model discloses set up the exhaust cavity on one side of arc extinguishing installation cavity, both keep apart and are provided with the exhaust hole at the division board through the division board, and in exhaust process, can produce the atmospheric pressure difference between explosion chamber and the exhaust cavity, realize quick exhaust, and the exhaust cavity is provided with two gas vents and with the spigot surface of ionized gas direction gas vent moreover, promotion exhaust efficiency that can be very big, improvement circuit breaker's breaking capacity and safety in utilization.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings obtained from these drawings still belong to the scope of the present invention without inventive laboriousness.
FIG. 1 is a schematic view of the present invention;
fig. 2 is a schematic view of a first housing according to the present invention;
fig. 3 is a partial schematic view of the first and second partition plates of the present invention;
FIG. 4 is a schematic view of the flow of ionized gas in the present invention;
fig. 5 is a first schematic view of the arc extinguish chamber in the present invention;
fig. 6 is a schematic diagram of a second arc-extinguishing chamber according to the present invention;
in the figure, 1-first housing, 2-second housing, 3-arc extinguishing installation chamber, 4-exhaust chamber, 5-splitter, 51-first splitter, 52-second splitter, 53-abutment step, 6-exhaust hole, 61-first exhaust groove, 62-second exhaust groove, 63-vent hole, 7-first exhaust hole, 8-second exhaust hole, 81-arc isolation area, 9-first guide surface, 10-second guide surface, 11-convex strip, 12-gas channel, 13-arc guide groove, 14-arc extinguishing chamber, 141-arc extinguishing grid sheet, 1411-V-shaped opening, 1412-groove, 1413-convex block, 142-fixed sheet, 1421-clamping opening, 143-arc guiding insertion sheet, 1431-arc guiding end, 1432-arc guiding end, 1433-bending end, 1434-elastic included angle, 1435-vent hole, 1436-through groove.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings.
It should be noted that all expressions using "first" and "second" in the embodiments of the present invention are used to distinguish two entities with the same name but different names or different parameters, and it is understood that "first" and "second" are merely for convenience of expression and should not be construed as limitations of the embodiments of the present invention, and the following embodiments do not describe this one by one.
The terms of direction and position in the present invention, such as "up", "down", "front", "back", "left", "right", "inside", "outside", "top", "bottom", "side", etc., refer to the direction and position of the attached drawings. Accordingly, the directional and positional terms used are intended to illustrate and understand the present invention and are not intended to limit the scope of the invention.
As shown in fig. 1 to fig. 6, for the present invention, an embodiment is provided:
an exhaust and arc-extinguishing structure of a residual current circuit breaker comprises a first shell 1 and a second shell 2 which are oppositely combined to form a cavity, wherein the cavity comprises an arc-extinguishing installation cavity 3, an exhaust cavity 4 is arranged on one side of the arc-extinguishing installation cavity 3, a partition plate 5 is arranged between the arc-extinguishing installation cavity 3 and the exhaust cavity 4, a plurality of exhaust holes 6 are formed in the partition plate 5, and in the exhaust process, air pressure difference can be generated between the arc-extinguishing chamber and the exhaust cavity 4, so that rapid exhaust is realized; exhaust chamber 4 is provided with first exhaust port 7 and second exhaust port 8, the opposite exhaust chamber 4 lateral wall of exhaust hole 6 is provided with first spigot surface 9 and second spigot surface 10 that is used for leading gas respectively to first exhaust port 7 and second exhaust port 8, in this embodiment, first spigot surface 9 and second spigot surface 10 are the inclined plane and both are the setting of ridge form, two exhaust ports are located two inclined plane bottoms respectively, can follow first spigot surface 9 and second spigot surface 10 fast flow to corresponding exhaust port after ionization gas is discharged by exhaust hole 6, promotion exhaust efficiency that can be very big, improve the breaking capacity and the safety in utilization of circuit breaker.
The opposite side of arc extinguishing installation cavity 3 be provided with the striking groove 13 of gas channel 12 intercommunication, the electric arc that produces between the sound contact of circuit breaker contact mechanism can enter into the explosion chamber fast along striking groove 13 and cool off, reduces the dwell time of electric arc, prevents that contact mechanism from burning out.
The partition plate 5 comprises a first partition plate 51 positioned on the first shell 1 and a second partition plate 52 positioned on the second shell 2, the exhaust hole 6 comprises a first exhaust groove 61 arranged on the first partition plate 51 and a second exhaust groove 62 arranged on the second partition plate 52, the first exhaust groove 61 and the second exhaust groove 62 are arranged in a staggered mode, the partition plate 5 forms a barrier to the flow of ionized gas on one side to form delayed gas, arc extinguishing is facilitated, and the exhaust hole 6 is arranged so that the delayed gas can be exhausted.
The exhaust hole 6 further comprises vent holes 63 formed in the first partition plate 51 and the second partition plate 52, and the vent holes 63 are located at the projection positions of the gas channel 12 on the first partition plate 51 and the second partition plate 52, so that the exhaust efficiency is further improved.
The butt joint end faces of the first partition plate 51 and the second partition plate 52 are provided with adaptive butt joint steps 53, when the two shells are in butt joint, the butt joint steps 53 are mutually limited, and the two partition plates are prevented from being staggered to form an overlarge gap, so that sufficient obstruction to ionized gas and electric arc cannot be formed.
The arc extinguishing chamber 14 is arranged in the arc extinguishing installation chamber 3, the arc extinguishing chamber 14 comprises a plurality of arc extinguishing grid plates 141 which are arranged in parallel at intervals, fixing plates 142 used for connecting the arc extinguishing grid plates 141, and at least one arc striking inserting sheet 143, the arc striking inserting sheet 143 comprises two arc guiding ends 1431 which can be inserted between the arc extinguishing grid plates 141 and an arc striking end 1432 used for leading the arc to the arc guiding ends 1431, the two arc guiding ends 1431 are separated by two arc extinguishing grid plates 141, the arc generated by moving and static contacts can be quickly led into the arc extinguishing grid plates 141 for extinguishing, the arc striking capability of the circuit breaker is improved, and the breaking capability of the circuit breaker is enhanced.
The arc striking insertion sheet 143 is a conductive material bending forming, and further comprises an elastic bending end 1433, the bending end 1433 enables an adjustable elastic included angle 1434 to be formed between the two arc striking ends 1431, the elastic included angle 1434 provides elastic resilience force for the two arc striking ends 1431 to enable the two arc striking ends 1431 to be connected to the arc extinguishing grid plate 141, the arc striking insertion sheet 143 can be a flexible metal sheet bending forming, the two arc striking ends 1431 are clamped or propped open between the arc extinguishing grid plates 141 through the resilience force of the bending end 1433, the arc striking insertion sheet 143 is prevented from falling off in the using process, and the arc striking capacity is reduced.
The bending end 1433 is provided with at least one vent hole 1435, so that ionized gas can be introduced into the arc extinguish chamber, and the breaking capacity of the circuit breaker is improved.
The arc-extinguishing grid plates 141 comprise V-shaped openings 1411, grooves 1412 connected with the fixing plates 142 and bumps 1413 arranged in the grooves 1412, the fixing plates 142 are fixed in the grooves 1412, the fixing plates 142 comprise clamping interfaces 1421 connected with the bumps 1413 of each arc-extinguishing grid plate 141, and the arc guide ends 1431 of the arc-striking insertion plates 143 are provided with through grooves 1436 communicated with the V-shaped openings 1411, so that ionized gas in the arc-extinguishing chamber can be conveniently circulated, the ionized gas can be rapidly discharged, the breaking capacity can be improved, the integral structure of the arc-extinguishing chamber is simple, and batch production can be conveniently carried out.
Furthermore, the breaker further comprises a first arc striking plate, a second arc striking plate and a fixed contact, wherein the first arc striking plate and the second arc striking plate are arranged on two sides of the arc extinguishing chamber, the fixed contact extends to form an arc striking angle, and one end of the first arc striking plate is located in the arc striking angle, so that the breaker can be matched with an efficient and safe exhaust arc extinguishing structure through a quick arc striking structure, and the breaking capacity of the breaker is greatly improved.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention, therefore, all equivalent variations of the present invention are intended to be covered by the present invention.
Claims (10)
1. The utility model provides a leakage circuit breaker's exhaust arc extinguishing structure, includes first casing (1) and second casing (2) to closing the formation cavity, a serial communication port, the cavity is including arc extinguishing installation cavity (3), arc extinguishing installation cavity (3) one side is provided with exhaust cavity (4), be provided with division board (5) between arc extinguishing installation cavity (3) and exhaust cavity (4), be provided with a plurality of exhaust holes (6) on division board (5), exhaust cavity (4) are provided with first gas vent (7) and second gas vent (8), exhaust cavity (4) lateral wall opposite in exhaust hole (6) is provided with first spigot surface (9) and second spigot surface (10) that are used for leading gas respectively to first gas vent (7) and second gas vent (8), first casing (1) and second casing (2) inner wall that arc extinguishing installation cavity (3) correspond are provided with a plurality of sand grip (11) and constitute gas channel (12), the opposite side of installation cavity (3) be provided with arc guide groove (13) that gas channel (12) communicate.
2. An exhaust and arc extinguishing structure of a residual current circuit breaker according to claim 1, characterized in that the partition plate (5) comprises a first partition plate (51) on the first housing (1) and a second partition plate (52) on the second housing (2), the exhaust hole (6) comprises a first exhaust groove (61) provided on the first partition plate (51) and a second exhaust groove (62) provided on the second partition plate (52), and the first exhaust groove (61) and the second exhaust groove (62) are arranged in a staggered manner.
3. An exhaust arc extinguishing structure of a residual current circuit breaker according to claim 2, characterized in that the exhaust hole (6) further comprises a vent hole (63) provided on the first and second partition plates (51, 52), the vent hole (63) being located at a projected position of the gas channel (12) on the first and second partition plates (51, 52).
4. An exhaust arc extinguishing structure of a residual current circuit breaker according to claim 2, characterized in that the abutting end surfaces of the first partition plate (51) and the second partition plate (52) are provided with adaptive abutting steps (53).
5. An exhaust and arc extinguishing structure of a residual current circuit breaker according to claim 1, characterized in that an arc isolating area (81) is arranged at the second exhaust port (8), and the arc isolating area (81) is provided with an arc isolating piece.
6. The exhaust and arc extinguishing structure of the residual current circuit breaker according to claim 1, further comprising an arc extinguishing chamber (14) disposed in the arc extinguishing installation chamber (3), wherein the arc extinguishing chamber (14) comprises a plurality of arc extinguishing grids (141) spaced apart from each other at a certain distance and disposed in parallel, a fixing plate (142) for connecting each arc extinguishing grid (141), and at least one arc guiding insertion sheet (143), wherein the arc guiding insertion sheet (143) comprises two arc guiding ends (1431) capable of being inserted between the arc extinguishing grids (141) and an arc guiding end (1432) for guiding an arc to the arc guiding ends (1431), and two arc extinguishing grids (141) are spaced apart from each other between the two arc guiding ends (1431).
7. The exhaust and arc extinguishing structure of the residual current circuit breaker according to claim 6, wherein the arc striking inserting piece (143) is formed by bending and molding a conductive material, and further comprises a bending end (1433) with elasticity, the bending end (1433) enables an adjustable elastic included angle (1434) to be formed between the two arc guiding ends (1431), and the elastic included angle (1434) provides an elastic resilience force for the two arc guiding ends (1431) to be connected to the arc chute piece (141).
8. Exhaust arc extinguishing structure of residual current circuit breaker according to claim 7, characterized in that said bent end (1433) is provided with at least one vent hole (1435).
9. The exhaust and arc extinguishing structure of the residual current circuit breaker according to claim 6, wherein the arc chute plates (141) comprise V-shaped openings (1411), grooves (1412) connected with the fixing plates (142) and protrusions (1413) arranged in the grooves (1412), the fixing plates (142) are fixed in the grooves (1412), the fixing plates (142) comprise clamping interfaces (1421) connected with the protrusions (1413) of each arc chute plate (141), and the arc guide ends (1431) of the arc guide insertion plates (143) are provided with through grooves (1436) communicated with the V-shaped openings (1411).
10. The exhaust and arc extinguishing structure of the residual current circuit breaker according to claim 6, further comprising a first arc striking plate, a second arc striking plate and a fixed contact, wherein the first arc striking plate and the second arc striking plate are arranged on two sides of the arc extinguishing chamber, an arc striking angle extends from the fixed contact, and one end of the first arc striking plate is located in the arc striking angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222091193.9U CN217822646U (en) | 2022-08-09 | 2022-08-09 | Exhaust arc extinguishing structure of residual current circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222091193.9U CN217822646U (en) | 2022-08-09 | 2022-08-09 | Exhaust arc extinguishing structure of residual current circuit breaker |
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| Publication Number | Publication Date |
|---|---|
| CN217822646U true CN217822646U (en) | 2022-11-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222091193.9U Active CN217822646U (en) | 2022-08-09 | 2022-08-09 | Exhaust arc extinguishing structure of residual current circuit breaker |
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| Country | Link |
|---|---|
| CN (1) | CN217822646U (en) |
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- 2022-08-09 CN CN202222091193.9U patent/CN217822646U/en active Active
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