CN213026017U - Arc extinguish chamber of low-voltage circuit breaker - Google Patents
Arc extinguish chamber of low-voltage circuit breaker Download PDFInfo
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- CN213026017U CN213026017U CN202021822050.5U CN202021822050U CN213026017U CN 213026017 U CN213026017 U CN 213026017U CN 202021822050 U CN202021822050 U CN 202021822050U CN 213026017 U CN213026017 U CN 213026017U
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- voltage circuit
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- arc extinguishing
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Abstract
The utility model discloses a low-voltage circuit breaker explosion chamber, include the insulator group of constituteing by two insulators (1), be equipped with a plurality of slots (101) in every insulator (1) side by side, be equipped with run-on piece (2) and a plurality of arc extinguishing bars piece (3) side by side on the insulator group, all be equipped with two arc legs (4) on every run-on piece (2) and arc extinguishing bars piece (3), in slot (101) of two insulators (1) are even gone into respectively to two arc legs (4). The utility model has the characteristics of easy to assemble, arc extinguishing is effectual.
Description
Technical Field
The utility model relates to a circuit breaker arc extinguishing mechanism, especially a low-voltage circuit breaker explosion chamber.
Background
The arc extinguishing mechanism of the low-voltage molded case circuit breaker mainly comprises an arc extinguishing chamber and a contact system, wherein the arc extinguishing chamber is used for extinguishing electric arcs generated when contacts of the circuit breaker are broken, the electric arcs are introduced into the arc extinguishing chamber by using the principles of electromagnetic fields, air blowing and the like, and then the electric arcs are divided into short arcs connected in series by arc extinguishing grid pieces, so that the electric arcs are thinned, lengthened, the voltage drop of the electric arcs is improved, and the electric arcs are cooled, thereby achieving the arc extinguishing effect. The arc extinguishing chambers of the existing circuit breakers are mainly divided into two types, the first structure is composed of arc extinguishing grid pieces and arc isolating side walls for fixing the arc extinguishing grid pieces, bosses on two sides of the arc extinguishing grid pieces are matched with grooves on the arc isolating side walls, and the arc extinguishing grid pieces and the arc isolating side walls are connected together through riveting; however, each grid plate in the structure needs to be riveted, so that the assembly difficulty of the arc extinguish chamber is greatly increased, the riveting process is complicated, and the production efficiency is low.
The second structure is a cavity formed by two shells, wherein a plurality of rib grooves are formed in one shell and used for installing arc-extinguishing grid pieces, the arc-extinguishing grid pieces are covered with the other shell after being inserted, and a notch through which a moving contact can penetrate is reserved on the shell. However, due to the structure, the arc extinguishing fence sheet is completely wrapped in the shell, so that the volume of the arc extinguishing fence sheet cannot be large, and the thermal capacity of the arc extinguishing fence sheet is reduced. In addition, the arc extinguishing fence piece still can not insert appointed trench easily when inserting, need take out the back and assemble again, and take out the in-process still probability and take out the adjacent arc extinguishing fence piece that has inserted the correct position originally together, cause man-hour extravagant. Therefore, the existing arc extinguishing mechanism of the circuit breaker has the problems of difficult installation and poor arc extinguishing effect.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a low-voltage circuit breaker explosion chamber. The arc extinguishing device has the characteristics of convenience in installation and good arc extinguishing effect.
The technical scheme of the utility model: the utility model provides a low-voltage circuit breaker explosion chamber, includes the insulator group of constituteing by two insulators, is equipped with a plurality of slots in every insulator side by side, is equipped with run-on piece and a plurality of arc extinguishing bars piece side by side on the insulator group, all is equipped with two arc legs on every run-on piece and the arc extinguishing bars piece, and two arc legs link into the slot of two insulators respectively.
In the arc extinguish chamber of the low-voltage circuit breaker, a cavity is arranged in the insulating part, an opening is formed in one side of the cavity, a plurality of separating ribs are arranged in the cavity side by side, and a slot is formed between every two adjacent separating ribs.
In the arc extinguish chamber of the low-voltage circuit breaker, a V-shaped through groove penetrating through the narrow slot is arranged in the cavity.
In the arc extinguish chamber of the low-voltage circuit breaker, the two arc legs are arranged on the arc striking plate and the arc extinguish grid plate in a V shape.
In the arc extinguish chamber of the low-voltage circuit breaker, the arc striking plate is positioned at the top of the insulating member group, and a first placing groove is formed between the arc striking plate and the two insulating members; and a second placing groove is formed between the arc extinguishing grid sheet positioned at the bottom of the insulating member group and the two insulating members.
In the arc extinguish chamber of the low-voltage circuit breaker, the arc legs are provided with the bosses positioned at the openings of the slots, and the outer end faces of the bosses are attached to the upper top faces or the lower bottom faces of the slots.
Compared with the prior art, the utility model divides the insulator group into two split insulators, so that the arc striking plate and the arc extinguishing grid plate except the arc leg part can be exposed outside the insulator, thereby effectively increasing the area of the arc striking plate and the arc extinguishing grid plate and improving the thermal capacity and the arc extinguishing effect of the grid plate; through the structural matching of the cavity and the spacer ribs in the insulating part, the arc-extinguishing barrier can form stable insulating protection on arc legs of the arc-extinguishing barrier, prevent short circuit fault of an electric arc and a movable contact rod at a long leg, and further improve the stability and the arc-extinguishing effect of the arc-extinguishing barrier; the lug bosses which are mutually buckled with the slots at the opening can effectively limit the insertion depth and the height of the arc striking plates and the arc extinguishing grid plates, so that the distance between each arc striking plate and each arc extinguishing grid plate is protected stably, the possibility of the stress disengagement of the arc striking plates and the arc extinguishing grid plates is effectively reduced, and the arc extinguishing effect of the arc extinguishing device is further improved; the installer can also determine whether the arc striking plate and the arc chute plate are in a complete insertion state according to the position of the boss, thereby further facilitating the installation and the inspection of the arc chute mechanism. Therefore, the utility model has the characteristics of easy to assemble, arc extinguishing is effectual.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is an external view of the insulator;
FIG. 3 is an outline view of the arc runner;
fig. 4 is an outline view of the arc chute.
The labels in the figures are: 1-insulating part, 2-arc striking plate, 3-arc extinguishing grid plate, 4-arc leg, 5-boss, 101-slot, 102-separating rib and 103-V-shaped through groove.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
Examples are given. An arc extinguish chamber of a low-voltage circuit breaker is composed of an insulating part group consisting of two insulating parts 1, wherein a plurality of slots 101 are arranged in each insulating part 1 side by side, arc striking plates 2 and arc extinguishing grids 3 are arranged on the insulating part group side by side, two arc legs 4 are arranged on each arc striking plate 2 and each arc extinguishing grid 3, and the two arc legs 4 are respectively connected into the slots 101 of the two insulating parts 1.
A cavity is arranged in the insulating part 1, an opening is formed in one side of the cavity, a plurality of separating ribs 102 are arranged in the cavity side by side, and a slot is formed between every two adjacent separating ribs 102.
A V-shaped through slot 103 is provided in the cavity through the slot 101.
The two arc legs 4 are arranged on the arc striking plate 2 and the arc extinguishing grid plate 3 in a V shape.
The arc striking plate 2 is positioned at the top of the insulating member group, and a first placing groove is formed between the arc striking plate 2 and the two insulating members 1; and a second placing groove is formed between the arc extinguishing grid piece 3 positioned at the bottom of the insulating piece group and the two insulating pieces 1, and the first placing groove and the second placing groove are respectively used for the entrance of a static contact and a moving contact.
The arc legs 4 are provided with bosses 5 positioned at openings of the slots 101, and the outer end faces of the bosses 5 are attached to the upper top faces or the lower bottom faces of the slots 101.
The utility model discloses a theory of operation: when the circuit breaker encounters a short-circuit fault, the movable contact and the fixed contact are respectively opened in the first placing groove and the second placing groove, and the arc striking pieces 2 drive the electric arc to move towards the inside of the insulating part 1, so that the electric arc enters the arc extinguishing grid pieces 3, and the electric arc is cut and cooled.
Claims (6)
1. The utility model provides a low-voltage circuit breaker explosion chamber which characterized in that: the arc extinguishing device comprises an insulating part group consisting of two insulating parts (1), wherein a plurality of slots (101) are arranged in each insulating part (1) side by side, arc striking plates (2) and a plurality of arc extinguishing grid plates (3) are arranged on the insulating part group side by side, two arc legs (4) are arranged on each arc striking plate (2) and each arc extinguishing grid plate (3), and the two arc legs (4) are respectively connected into the slots (101) of the two insulating parts (1).
2. Arc chute for low-voltage circuit breakers, according to claim 1, characterized in that: a cavity is arranged in the insulating part (1), an opening is formed in one side of the cavity, a plurality of separating ribs (102) are arranged in the cavity side by side, and a slot is formed between every two adjacent separating ribs (102).
3. Arc chamber of a low-voltage circuit breaker according to claim 2, characterized in that: a V-shaped through groove (103) penetrating through the slot (101) is arranged in the cavity.
4. Arc chute for low-voltage circuit breakers, according to claim 1, characterized in that: the two arc legs (4) are arranged on the arc striking plate (2) and the arc extinguishing grid plate (3) in a V shape.
5. Arc chute for low-voltage circuit breakers, according to claim 1, characterized in that: the arc striking plate (2) is positioned at the top of the insulating member group, and a first placing groove is formed between the arc striking plate (2) and the two insulating members (1); and a second placing groove is formed between the arc extinguishing grid plate (3) positioned at the bottom of the insulating member group and the two insulating members (1).
6. Arc chute for low-voltage circuit breakers, according to claim 1, characterized in that: the arc legs (4) are provided with bosses (5) positioned at the openings of the slots (101), and the outer end faces of the bosses (5) are attached to the upper top faces or the lower bottom faces of the slots (101).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021822050.5U CN213026017U (en) | 2020-08-27 | 2020-08-27 | Arc extinguish chamber of low-voltage circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021822050.5U CN213026017U (en) | 2020-08-27 | 2020-08-27 | Arc extinguish chamber of low-voltage circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213026017U true CN213026017U (en) | 2021-04-20 |
Family
ID=75471053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021822050.5U Active CN213026017U (en) | 2020-08-27 | 2020-08-27 | Arc extinguish chamber of low-voltage circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213026017U (en) |
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2020
- 2020-08-27 CN CN202021822050.5U patent/CN213026017U/en active Active
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