CN214378307U

CN214378307U - Arc extinguish chamber structure of circuit breaker

Info

Publication number: CN214378307U
Application number: CN202120570388.4U
Authority: CN
Inventors: 袁辉; 高腾飞; 高柏勇; 令狐绍江; 臧卫
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2021-03-19
Filing date: 2021-03-19
Publication date: 2021-10-08
Anticipated expiration: 2031-03-19

Abstract

The utility model provides a circuit breaker explosion chamber structure, including arc extinguishing casing, static contact and be used for contacting or the moving contact of disconnection with the static contact, the moving contact can contact or separate with the static contact, the arc extinguishing casing is provided with at least one half groove venthole on keeping away from the lateral wall of moving contact to and along vertical setting, can guide the gas outlet channel of electric arc, the gas outlet channel tip is provided with and is used for the gas outlet with electric arc exhaust, half groove venthole, gas outlet channel and gas outlet three intercommunication, and circuit breaker explosion chamber structure can realize in time with the gas outgoing in the explosion chamber, prevents that the inside atmospheric pressure of explosion chamber is too high and cause the condition that the casing explodes.

Description

Arc extinguish chamber structure of circuit breaker

Technical Field

The utility model relates to a distribution technical field, concretely relates to circuit breaker explosion chamber structure.

Background

The breaker is a switching device which can close, bear and break the current under the condition of a normal loop and can close and bear the current under the condition of an abnormal loop within a specified time, and the breaker is mainly used for cutting off and connecting a load circuit and cutting off a fault circuit, preventing the accident from expanding and ensuring the safe operation. For a common molded case circuit breaker in the circuit breaker, all parts are sealed in a plastic shell, and the power supply can be automatically cut off after the current exceeds a rated value.

The arc control device of the existing molded case circuit breaker mainly comprises an arc extinguish chamber and a contact system, wherein the arc extinguish chamber is used for extinguishing electric arcs generated when a static contact and a moving contact of the circuit breaker are separated, the short arcs connected in series are cut into by utilizing arc extinguishing grid pieces inside the arc extinguish chamber, the electric arcs become thin and arc voltage drop is rapidly improved, and therefore the arc extinguish chamber structure is an important structure for breaking and breaking arc extinguishing of a molded case product, a large amount of gas can be generated in the arc extinguish chamber in the breaking process, if the gas in the arc extinguish chamber is not discharged in time, when the air pressure in the arc extinguish chamber is too large, the shell in the arc extinguish chamber is easy to crack.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming among the prior art atmospheric pressure in the explosion chamber and not being in time discharged, leading to the defect that the explosion of explosion chamber casing splits to provide one kind can realize in time with the gas outgoing in the explosion chamber, prevent that the inside atmospheric pressure of explosion chamber is too high and cause the circuit breaker explosion chamber structure that the casing bursts apart.

Therefore, the utility model provides a circuit breaker explosion chamber structure, including arc extinguishing casing, static contact and be used for contacting or the moving contact of disconnection with the static contact, the moving contact can contact or separate with the static contact, the arc extinguishing casing is kept away from and is provided with at least one half groove venthole on the lateral wall of moving contact to and along vertical setting, can guide the air outlet channel of electric arc, the air outlet channel tip is provided with and is used for the gas outlet with electric arc exhaust, half groove venthole, air outlet channel and gas outlet three intercommunication.

Further: one of the half-slot air outlet holes is arranged at the lower end of the side wall of the arc extinguishing shell.

Further: be equipped with a plurality of first arc extinguishing bars piece and a plurality of second arc extinguishing bars piece in the arc extinguishing casing, be provided with first breach on the position at first arc extinguishing bars piece left side top, be provided with the second breach on the position at second arc extinguishing bars piece right side top, first arc extinguishing bars piece and second arc extinguishing bars piece interval set up.

Further: arc extinguishing casing includes that mutual lock sets up, and through screw fixation's left casing and right casing, and the shaping has the slot that supplies first arc extinguishing bars piece and second arc extinguishing bars piece to insert on the inner wall of left casing and right casing.

Further: and at least one layer of arc extinguishing baffle plate for preventing the electric arc from being sprayed is arranged at the rear ends of the first arc extinguishing grid plate and the second arc extinguishing grid plate.

Further: the arc extinguishing baffle comprises a first arc extinguishing baffle, and the first arc extinguishing baffle is obliquely arranged at the air outlets of the first arc extinguishing grid piece and the second arc extinguishing grid piece.

Further: the arc extinguishing baffle is still including locating second flashover baffle and the third flashover baffle that is the interval and arranges of explosion chamber gas vent rear side, be provided with first through-hole on the first flashover baffle, first through-hole is provided with a plurality ofly and extends the array setting along the length direction of first flashover baffle.

Further: the second flashover baffle and the third flashover baffle are respectively provided with a second through hole and a third through hole which are arranged along the length direction of the second flashover baffle and the third flashover baffle in an extending way, and the second through holes and the third through holes are distributed in a staggered way.

Further: the radius of the first through hole, the radius of the second through hole and the radius of the third through hole are 1 mm.

Further: the arc extinguishing shell is provided with a gas generating cover, and the gas generating cover is made of a gas generating material.

The utility model discloses technical scheme has following advantage:

1. the utility model provides a circuit breaker explosion chamber structure, the setting of half groove gas outlet, gas outlet channel and gas outlet can make the gaseous guide of explosion chamber lower extreme get into gas outlet channel, and is gaseous discharge at last, prevents that bottom atmospheric pressure is too big to cause the casing to explode and split.

2. The utility model provides a circuit breaker explosion chamber structure, through the setting of first breach and second breach, first arc extinguishing bars piece and second arc extinguishing bars piece form the crisscross mode of giving vent to anger about, can accelerate electric arc to remove to the gas outlet, prevent that electric arc from shifting to the moving contact direction, are unfavorable for extinguishing of electric arc.

3. The utility model provides a circuit breaker explosion chamber structure, through the setting of arc extinguishing baffle, after electric arc absorbs through the cutting of explosion chamber bars piece, residual electric arc flows through arc extinguishing baffle department again to realize zero flashover function.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a perspective view of an arc extinguish chamber structure of the utility model;

fig. 2 is a schematic structural view of the circuit breaker of fig. 1 with a base removed;

FIG. 3 is a schematic view of the arc chamber portion of FIG. 1 with the housing removed;

FIG. 4 is another schematic view of the arc chamber portion of FIG. 2 with the housing removed;

fig. 5 is a cross-sectional view between the arc chute and the arc chute.

Description of reference numerals: 1. an arc extinguishing housing; 11. a moving contact; 12. static contact; 2. a half-groove air outlet; 21. an air outlet channel; 22. an air outlet; 3. a first arc chute; 31. a first notch; 4. a second arc chute; 41. a second notch; 5. a gas generating cover; 6. a left housing; 61. a right housing; 62. a slot; 7. an arc extinguishing baffle; 71. a first flashover baffle; 72. a second flashover baffle; 73. a third flashover baffle; 8. a first through hole; 81. a second through hole; 82. a third via.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Examples

The embodiment provides an arc extinguishing chamber structure of a circuit breaker, as shown in fig. 1 and 5: the arc extinguishing shell comprises an arc extinguishing shell 1, a fixed contact 12 and a movable contact 11 which is used for being in contact with or being disconnected from the fixed contact 12, wherein the movable contact 11 can be in contact with or separated from the fixed contact 12, at least one half-groove air outlet 2 and an air outlet channel 21 which is vertically arranged and can guide electric arcs are arranged on the side wall of the arc extinguishing shell 1 away from the movable contact 11, an air outlet 22 used for discharging the electric arcs is arranged at the end part of the air outlet channel 21, and the half-groove air outlet 2, the air outlet channel 21 and the air outlet 22 are communicated.

The specific improvement is as follows: if the gas outlet 22 among the arc extinguishing system is effectual, is unfavorable for the electric arc motion, easily causes electric arc to withdraw from the bars piece, causes puncture phenomenon behind one's back, and when the too big smooth discharge of arc pressure in the arc extinguish chamber, easily causes the phenomenon that arc extinguishing casing 1 explodes and splits, to this problem, new embodiment, embodiment 1 have been proposed to this embodiment: the side wall of the arc extinguishing shell 1 far away from the movable contact 11 is provided with a half-groove air outlet 2, the half-groove air outlet 2 is connected with an air outlet channel 21, the tail end of the air outlet channel 21 is provided with an air outlet 22, air in the arc extinguishing chamber can enter the air outlet channel 21 along the half-groove air outlet 2 and is finally discharged through the air outlet 22, and through the arrangement of the half-groove air outlet 2, the air outlet channel 21 and the air outlet 22, the air at the bottom of the arc extinguishing chamber can be effectively discharged upwards, so that the phenomenon that the shell is cracked due to overlarge pressure in the arc extinguishing chamber is avoided; example 2 is essentially the same as example 1, except that: set up a plurality of half groove ventholes 2 on air outlet channel 21, half groove venthole 2 extends the setting along air outlet channel 21's length direction, so just can accelerate the electric arc in the arc extinguish chamber and get into air outlet channel 21 department, finally follow gas outlet 22 and locate the discharge, so just be superior to prior art, can effectually discharge the gas in the arc extinguish chamber, prevent that the atmospheric pressure in the arc extinguish chamber is too high.

As alternative embodiments: one of the half-slot air outlet holes 2 is arranged at the lower end of the side wall of the arc extinguishing shell 1.

The specific improvement is as follows: half groove venthole 2 sets up in the below of lateral wall, is favorable to discharging the electric arc of 1 bottoms of arc extinguishing casing, avoids the inside pressure of explosion chamber too big, leads to the casing to explode and splits.

As alternative embodiments: be equipped with a plurality of first arc extinguishing bars piece 3 and a plurality of second arc extinguishing bars piece 4 in the arc extinguishing casing 1, be provided with first breach 31 on the position at first arc extinguishing bars piece 3 left side top, be provided with second breach 41 on the position at second arc extinguishing bars piece 4 right side top, first arc extinguishing bars piece 3 and the setting of second arc extinguishing bars piece 4 interval.

The specific improvement is as follows: arc extinguishing casing 1 is inside to be provided with a plurality of first arc extinguishing bars piece 3 and second arc extinguishing bars piece 4, first arc extinguishing bars piece 3 and the crisscross setting of second arc extinguishing bars piece 4 interval, first breach 31 has been set up on first arc extinguishing bars piece 3, second breach 41 has been set up on the second arc extinguishing bars piece 4, first breach 31 and second breach 41 form the crisscross mode of giving vent to anger for electric arc, this kind of track of giving vent to anger can accelerate electric arc to remove to the gas outlet 22 of explosion chamber by first arc extinguishing bars piece 3 and second arc extinguishing bars piece 4, prevent that electric arc from shifting to 11 directions of moving contact, cause breakdown phenomena behind one's back.

As alternative embodiments: arc extinguishing casing 1 includes that mutual lock sets up, and through screw fixation's left casing 6 and right casing 61, and the shaping has slot 62 that supplies first arc chute piece 3 and second arc chute piece 4 to insert on the inner wall of left casing 6 and right casing 61.

The specific improvement is as follows: have on the position of left side casing 6 and right casing 61 inner wall to supply first arc extinguishing bars piece 3 and second arc extinguishing bars piece 4 male slot 62, slot 62's setting can effectual fixed first arc extinguishing bars piece 3 and second arc extinguishing bars piece 4's position, need not to rivet again between the bars piece, treat first arc extinguishing bars piece 3 and second arc extinguishing bars piece 4 after fixed, will left casing 6 and right casing 61 between adopt the screw fix can.

As alternative embodiments: and at least one layer of arc extinguishing baffle 7 for preventing the electric arc from being sprayed out is arranged at the rear ends of the first arc extinguishing grid plate 3 and the second arc extinguishing grid plate 4.

The specific improvement is as follows: first arc extinguishing bars piece 3 and second arc extinguishing bars piece 4 have set up the arc extinguishing baffle 7 of at least one deck, and arc extinguishing baffle 7's setting can guarantee that electric arc is absorbed after first arc extinguishing bars piece 3 and the cutting of second arc extinguishing bars piece 4, and the residual arc is further absorbed after flowing through arc extinguishing baffle 7 to realize zero flashover function.

As alternative embodiments: the arc extinguishing baffle 7 comprises a first flashover baffle 71, and the first flashover baffle 71 is obliquely arranged at the air outlets of the first arc chute sheet 3 and the second arc chute sheet 4.

The specific improvement is as follows: first flashover baffle 71 slope sets up in the air outlet department of first arc chute piece 3 and second arc chute piece 4, after first arc chute piece 3 and second arc chute piece 4 carried out preliminary arc extinguishing, thereby first flashover baffle 71 can carry out the secondary arc extinguishing and realize zero flashover function.

As alternative embodiments: arc extinguishing baffle 7 is still including locating second flashover baffle 72 and the third flashover baffle 73 that is the interval and arranges of explosion chamber gas vent rear side, be provided with first through-hole 8 on the first flashover baffle 71, first through-hole 8 is provided with a plurality ofly and extends the array setting along the length direction of first flashover baffle 71.

The specific improvement is as follows: one of the positions where the first flashover baffle 71 is arranged can effectively absorb residual current, the second flashover baffle 72 and the third flashover baffle 73 are arranged at the position on the rear side of the exhaust port of the arc extinguish chamber, and electric arcs are absorbed and cut by the first flashover baffle 71 and then further absorbed by the second flashover baffle 72 and the third flashover baffle 73, so that the zero flashover function is finally realized.

As alternative embodiments: the second flashover baffle 72 and the third flashover baffle 73 are respectively formed with second through holes 81 and third through holes 82 which are arranged in an extending manner along the length direction of the second flashover baffle 72 and the third flashover baffle 73, and the second through holes 81 and the third through holes 82 are distributed in a staggered manner.

The specific improvement is as follows: the first through hole 8, the second through hole 81, and the third through hole 82 provided in the first flashover baffle 71, the second flashover baffle 72, and the third flashover baffle 73 can effectively prevent the arc from being ejected by the provision of the first through hole 8, the second through hole 81, and the third through hole 82.

As alternative embodiments: the radius of the first through hole 8, the second through hole 81 and the third through hole 82 is 1 mm.

As alternative embodiments: the arc extinguishing shell 1 is provided with a gas generating cover 5, and the gas generating cover 5 is made of a gas generating material.

The specific improvement is as follows: after the short circuit of the electric appliance occurs, the gas generating cover 5 can generate a large amount of gas, the gas generating material generates gas under the corrosion of the electric arc, on one hand, the electric arc is cooled, the cooling capacity is improved, and simultaneously, the gas pressure is increased to form strong gas flow to generate gas blowing, so that the time for the electric arc to stagnate and enter the first arc-extinguishing grid piece 3 and the second arc-extinguishing grid piece 4 is reduced.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.

Claims

1. The utility model provides a circuit breaker explosion chamber structure, its characterized in that, including arc extinguishing casing (1), static contact (12) and be used for contacting or moving contact (11) of disconnection with static contact (12), moving contact (11) can contact or separate with static contact (12), be provided with at least one half groove venthole (2) on the lateral wall of moving contact (11) is kept away from in arc extinguishing casing (1) to and along vertical setting, can guide gas outlet channel (21) of electric arc, gas outlet channel (21) tip is provided with and is used for gas outlet (22) with electric arc exhaust, and half groove venthole (2), gas outlet channel (21) and gas outlet (22) three communicate.

2. The circuit breaker interrupting chamber structure of claim 1 wherein: one of the half-slot air outlet holes (2) is arranged at the lower end of the side wall of the arc extinguishing shell (1).

3. The circuit breaker interrupting chamber structure according to claim 1 or 2, characterized in that: be equipped with a plurality of first arc extinguishing bars piece (3) and a plurality of second arc extinguishing bars piece (4) in arc extinguishing casing (1), be provided with first breach (31) on the position at first arc extinguishing bars piece (3) left side top, be provided with second breach (41) on the position at second arc extinguishing bars piece (4) right side top, first arc extinguishing bars piece (3) and second arc extinguishing bars piece (4) interval setting.

4. The circuit breaker interrupting chamber structure of claim 3 wherein: arc extinguishing casing (1) including mutual lock set up, and through left casing (6) and right casing (61) of screw fixation, the shaping has slot (62) that supply first arc extinguishing bars piece (3) and second arc extinguishing bars piece (4) to insert on the inner wall of left casing (6) and right casing (61).

5. The circuit breaker interrupting chamber structure of claim 4 wherein: and at least one layer of arc extinguishing baffle (7) for preventing the electric arc from being sprayed out is arranged at the rear ends of the first arc extinguishing grid plate (3) and the second arc extinguishing grid plate (4).

6. The circuit breaker interrupting chamber structure of claim 5 wherein: the arc extinguishing baffle (7) comprises a first flashover baffle (71), and the first flashover baffle (71) is obliquely arranged at the air outlets of the first arc extinguishing grid piece (3) and the second arc extinguishing grid piece (4).

7. The circuit breaker interrupting chamber structure of claim 6 wherein: the first flashover baffle (71) is provided with a first through hole (8), and the first through hole (8) is provided with a plurality of first through holes and extends along the length direction of the first flashover baffle (71) in an array mode.

8. The circuit breaker interrupting chamber structure of claim 7 wherein: arc extinguishing baffle (7) are still including locating second flashover baffle (72) and third flashover baffle (73) that are the interval and arrange of explosion chamber gas vent rear side, second flashover baffle (72) and third flashover baffle (73) shaping respectively have along second flashover baffle (72) and third flashover baffle (73) length direction extend second through-hole (81) and third through-hole (82) of arranging the setting, and second through-hole (81) and third through-hole (82) are the staggered distribution.

9. The circuit breaker interrupting chamber structure of claim 8 wherein: the radiuses of the first through hole (8), the second through hole (81) and the third through hole (82) are 1 mm.

10. The circuit breaker interrupting chamber structure of claim 9 wherein: the arc extinguishing shell (1) is provided with a gas generating cover (5), and the gas generating cover (5) is made of a gas generating material.