CN214175959U - Planar magnetic blowout arc extinguishing structure and circuit breaker - Google Patents

Abstract

The utility model provides a plane magnetic blowout arc extinguishing structure and circuit breaker, wherein, plane magnetic blowout arc extinguishing structure includes: the magnetic blow-out component is tightly pressed between the cover cap and the fixed contact; the positioning piece sequentially penetrates through the static contact and the magnetic blowing piece and is used for limiting the position of the magnetic blowing piece. The magnetic blowing piece is tightly pressed and fixed between the cover cap and the fixed contact and is positioned by the positioning piece, so that the magnetic blowing piece is fast and convenient to install and is firm to install; in addition, the cover cap can prevent electric arc from mixing to burn the static contact, and the service life of the static contact is prolonged.

Description

Planar magnetic blowout arc extinguishing structure and circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus technical field, concretely relates to plane magnetic blowout arc extinguishing structure and circuit breaker.

Background

The plastic shell breaker is one of circuit breakers, can automatically cut off current after the current exceeds a trip setting, has the protection functions of overload long time delay, short circuit instantaneous action and the like, and can be matched with module units such as a leakage device, a measuring mechanism, an electric operating mechanism and the like for use

At present, the first task of breaker breaking is to extinguish the electric arc generated when a moving contact and a fixed contact are disconnected, but because the breaking current of the breaker has critical current, when the breaking loop of the breaker is near the critical current, the electromagnetic force generated by the electric arc is not enough to move the electric arc, the electric arc can be caused to continuously burn at the inlet of an arc extinguish chamber, the electric arc can not be rapidly elongated to enter the arc extinguish chamber, and finally the restriking and even the breaking failure of the electric arc are caused. In order to solve the problems, the arc can be guided to the arc extinguishing chamber by arranging the magnetic blowing piece, so that the arc extinguishing efficiency is improved, but the existing magnetic blowing piece has the defects of more complicated installation and high cost.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the utility model lies in overcoming the magnetic blow-out piece among the prior art and having the defect that the installation is more loaded down with trivial details, with high costs to a plane magnetic blow-out arc extinguishing structure that the installation is swift convenient, with low costs is provided, and the circuit breaker that has this plane magnetic blow-out arc extinguishing structure.

Therefore, the utility model provides a plane magnetic quenching structure, including contact mechanism, explosion chamber, magnetic quenching spare and setting element, contact mechanism has moving contact and the static contact that can contact the intercommunication or separate the disconnection, have in the explosion chamber and be suitable for sheltering from the shroud of static contact; the magnetic blowing piece is tightly pressed between the cover cap and the fixed contact; and the positioning piece sequentially penetrates through the static contact and the magnetic blowing piece and is used for limiting the position of the magnetic blowing piece.

The piece is blown to magnetism is connected through the base location of location structure and circuit breaker, location structure includes: the first through hole is arranged on the static contact; the second through hole is arranged on the magnetic blowing piece and is opposite to the first through hole; and the positioning piece sequentially penetrates through the first through hole and the second through hole and then is connected with the magnetic blowing piece in a positioning mode.

The cover is detachably fixed on the static contact.

The shroud pass through the couple structure with static contact fixed connection, the couple structure includes: and the elastic hooks are arranged at the bottom of the cover cap and can be hooked and connected with the bottom surface of the static contact after penetrating through the first through hole of the static contact.

The arc extinguishing chamber is internally provided with an arc extinguishing grid piece, and the arc extinguishing chamber is internally provided with an arc extinguishing chamber.

The air blowing piece comprises two air generating plates which are arranged in parallel and extend into the arc extinguish chamber, and a connecting plate which is connected with the two air generating plates.

The connecting plate is arranged adjacent to the static contact bearing part of the static contact, can shield part of the static contact bearing part and exposes the static contact.

The bottom of the gas generating plate is abutted to the fixed contact, and the middle of the gas generating plate is provided with a positioning plate which extends towards the outer side and is abutted to the step corresponding to the arc extinguish chamber side plate.

The arc extinguishing grid piece positioned at the bottom of the arc extinguishing chamber is provided with an arc striking angle which extends towards the direction of the stationary contact and is used for striking an arc.

The utility model also provides a circuit breaker, include as above the plane magnetism blow-out arc extinguishing structure. The utility model discloses technical scheme has following advantage:

1. the utility model provides a plane magnetic blow arc extinguishing structure, including contact mechanism, explosion chamber, magnetic blow piece and air blow piece, during the assembly, place the magnetic blow piece on the stationary contact first, and then fixedly connect shroud and static contact to make the magnetic blow piece compress tightly and set up between shroud and kink, so the installation is swift and convenient; in addition, the cover cap can prevent electric arc from mixing to burn the static contact, and the service life of the static contact is prolonged.

2. The utility model provides a plane magnetism blows arc extinguishing structure, the setting element on the circuit breaker base passes the first through-hole of static contact and magnetism in proper order blows behind the second through-hole of piece, blows a location with magnetism and is connected to inject the position that magnetism blown the piece, guaranteed the magnetism like this and blown the effect.

3. The utility model provides a plane magnetic blowout arc extinguishing structure, shroud pass through couple structure and kink fixed connection, and the mounting means who adopts elastic hook has the swift convenient advantage of dismouting.

4. The utility model provides a plane magnetism blowout arc extinguishing structure, the adjacent stationary contact load-bearing part of connecting plate sets up, and it can shelter from partial stationary contact load-bearing part to the stationary contact is bared to expose, and the connecting plate can prevent that electric arc from scurrying in disorder and burning the static contact, has prolonged the life of static contact.

5. The utility model provides a plane magnetic blowout arc extinguishing structure, when the assembly, the bottom and the kink of product gas board offset, and the locating plate in its middle part can offset with the step that corresponds the explosion chamber curb plate to make the air-blowing piece and explosion chamber assembly together, above-mentioned air-blowing piece has simple structure, the swift convenient advantage of dismouting.

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 the planar magnetic quenching structure of the present invention installed on a circuit breaker;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is a perspective view of a planar magnetic quenching structure;

FIG. 4 is an exploded view of a planar magnetic quenching structure;

FIG. 5 is a schematic view of the structure of FIG. 4 with a portion of the side panel removed;

FIG. 6 is a cross-sectional view of FIG. 4;

fig. 7 is an assembly schematic view of a static contact, a cover cap and a magnetic blow-off piece;

fig. 8 is an exploded schematic view of a stationary contact, a cover cap and a magnetic blow-off member;

fig. 9 is a perspective view of the air-blowing piece.

Description of reference numerals: 1. a moving contact; 2. static contact; 21. a wiring portion; 22. a bending section; 221. a first through hole; 23. a stationary contact bearing section; 231. a vertical connecting section; 232. a transverse load-bearing section; 24. a stationary contact; 3. an arc extinguishing chamber; 31. arc extinguishing grid pieces; 310. an arc striking angle; 32. a side plate; 33. a step; 4. a cover; 40. a mounting cavity; 41. a first shielding portion; 42. a second shielding portion; 43. an elastic hook; 5. a magnetic blowing piece; 51. a second through hole; 6. an air-blowing member; 61. a gas generating plate; 62. a connecting plate; 63. positioning a plate; 7. a base; 71. a positioning member.

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 present embodiment provides a circuit breaker having a planar magnetic quenching structure disposed therein, as shown in fig. 3 and 4, the planar magnetic quenching structure includes a contact mechanism, an arc extinguishing chamber 3, a cover 4, a magnetic quenching member 5, and an air quenching member 6.

The contact mechanism comprises a movable contact 1 and a fixed contact 2 which can be connected or disconnected in a contact manner, as shown in fig. 7 and 8, the fixed contact 2 comprises a wiring portion 21, a bending portion 22 and a fixed contact bearing portion 23 which are connected in sequence, the bending portion 22 is provided with a first connecting section which is arranged in an inclined manner and connected with the wiring portion 21, a second connecting section which is connected with the first connecting section and the fixed contact bearing portion 23 and is arranged in a flat plate manner, a first through hole 221 is formed in the second connecting section, and the fixed contact bearing portion 23 is provided with a vertical connecting section 231 connected with the second connecting section and a transverse bearing section 232 which extends to the upper portion of the first through hole 221 and is suitable for arranging the fixed contact 24.

The cover cap 4 is disposed at the bottom of the arc extinguish chamber 3, as shown in fig. 8, the cover cap 4 is detachably and fixedly mounted on the bending portion 22 through a hook structure, and is adapted to cover the bending portion 22. The hook structure includes: and the elastic hooks 43 are arranged at the bottom of the cover cap 4, and the elastic hooks 43 can be hooked and connected with the bottom surface of the bent part 22 after penetrating through the first through holes 221. In this embodiment, the cross section of the cover cap 4 has a first shielding portion 41 in a shape of a Chinese character 'ji' and a second shielding portion 42 which is disposed along an inclined direction and connected to the first shielding portion 41, two side edges of the first shielding portion 41 in a shape of a Chinese character 'ji' abut against the bending portion 22, and a mounting cavity 40 suitable for mounting the magnetic blowing piece 5 is formed by enclosing the middle of the first shielding portion 41 and the bending portion 22. In this embodiment, the cover 4 is formed with a third through hole for the stationary contact bearing portion 23 to pass through.

The magnetic blowing piece 5 is flat and is disposed between the transverse bearing section 232 and the bending part 22, and the magnetic blowing piece 5 is disposed along the width direction of the bending part 22. The middle of the magnetic blow-off piece 5 is provided with a second through hole 51 arranged opposite to the first through hole 221. As shown in fig. 1 and 2, the positioning member 71 on the base 7 sequentially passes through the first through hole 221 and the second through hole 51, and then is connected to the magnetic blowing member 5 in a positioning manner.

As shown in fig. 5, the arc chute 3 has a plurality of arc chute plates 31 therein, and the arc chute plates 31 located at the bottom of the arc chute 3 have arc striking corners 310 extending toward the stationary contact 24 for striking an arc. The arc extinguishing chamber 3 has side plates 32 arranged opposite to each other on both sides, and a step 33 is provided in the middle of the side plates 32.

The air-blowing piece 6 is arranged in the arc extinguish chamber 3, the air-blowing piece can generate gas when the breaker is disconnected, and therefore air flow is generated to blow the arc to the arc extinguish grating, and the arc extinguish effect is better. As shown in fig. 3, 4 and 9, the blowing member 6 includes two gas generation plates 61 arranged in parallel and extending into the arc-extinguishing chamber 3, and a connecting plate 62 connecting the two gas generation plates 61. The connecting plate 62 is disposed adjacent to the stationary contact bearing part 23, as shown in fig. 6, and can shield a part of the stationary contact bearing part 23 and expose the stationary contact 24. The bottom of the gas generating plate 61 abuts against the bending part 22, and the middle part thereof is provided with a positioning plate 63 which extends towards the outside and abuts against the step 33 of the side plate 32 of the arc extinguish chamber 3.

As an alternative embodiment, the bent portion 22 is formed with a recess recessed downward adapted to receive the magnetic blow-off member 5.

The utility model provides a plane magnetic quenching structure, including contact mechanism, explosion chamber 3, magnetic quenching 5 and air quenching 6, during assembly, firstly, the magnetic quenching 5 is placed on the bending part 22, and then the cover 4 is fixedly connected with the bending part 22, so that the magnetic quenching 5 is tightly pressed between the cover 4 and the bending part 22, thus the installation is fast and convenient; in addition, the cover cap 4 can prevent electric arc from mixing to burn the static contact 2, and the service life of the static contact is prolonged; in addition, through setting up the gas blowing piece 6, gas production piece can produce gas when the circuit breaker divides to produce the air current and blow the electric arc to arc extinguishing bars piece 31, the arc extinguishing effect is better like this.

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 (10)

1. The utility model provides a plane magnetism blowout arc extinguishing structure, includes contact mechanism and explosion chamber (3), contact mechanism has movable contact (1) and static contact (2) that can contact intercommunication or separation disconnection, it is suitable for sheltering from to have in explosion chamber (3) shroud (4) of static contact (2), its characterized in that still includes:

the magnetic blowing piece (5) is arranged between the cover cap (4) and the static contact (2);

and the positioning piece (71) sequentially penetrates through the static contact (2) and the magnetic blowing piece (5) and is used for limiting the position of the magnetic blowing piece (5).

2. The planar magnetic quenching structure according to claim 1, wherein the magnetic quenching member (5) is connected with a base (7) of the circuit breaker by a positioning structure, and the positioning structure comprises:

the first through hole (221) is formed in the static contact (2);

the second through hole (51) is arranged on the magnetic blowing piece (5) and is opposite to the first through hole (221);

and the positioning piece (71) sequentially penetrates through the first through hole (221) and the second through hole (51) and then is connected with the magnetic blowing piece (5) in a positioning mode.

3. The planar magnetic quenching structure according to claim 1 or 2, characterized in that the cover (4) is detachably fixed on the stationary contact (2).

4. The planar magnetic quenching structure according to claim 3, wherein the cover (4) is fixedly connected with the stationary contact (2) by a hook structure, the hook structure comprising:

the elastic hooks (43) are arranged at the bottom of the cover cap (4), and the elastic hooks (43) can be hooked and connected with the bottom surface of the static contact (2) after penetrating through the first through holes (221) of the static contact (2).

5. The planar magnetic quenching structure according to claim 1, 2 or 4, characterized by further comprising a blowing member (6) arranged in the quenching chamber (3) for blowing the arc towards the quenching grids (31).

6. The planar magnetic quenching structure according to claim 5, characterized in that the blowing member (6) comprises two parallel gas generating plates (61) extending into the quenching chamber (3) and a connecting plate (62) connecting the two gas generating plates (61).

7. The planar magnetic quenching structure according to claim 6, characterized in that the connecting plate (62) is arranged adjacent to the stationary contact bearing part (23) of the stationary contact (2), which can shield part of the stationary contact bearing part (23) and expose the stationary contact (24).

8. The planar magnetic quenching structure according to claim 6 or 7, wherein the bottom of the gas generating plate (61) abuts against the static contact (2), and the middle of the gas generating plate has a positioning plate (63) extending outwards and abutting against the step (33) corresponding to the side plate (32) of the arc extinguishing chamber (3).

9. The planar magnetic quenching structure according to claim 8, characterized in that the quenching grids (31) at the bottom of the quenching chamber (3) have an ignition angle (310) extending towards the stationary contact (24) for ignition.

10. A circuit breaker comprising a planar magnetic quenching structure according to any of claims 1-9.

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