CN212848281U - Arc extinguishing chamber for molded case circuit breaker - Google Patents
Arc extinguishing chamber for molded case circuit breaker Download PDFInfo
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- CN212848281U CN212848281U CN202022319895.9U CN202022319895U CN212848281U CN 212848281 U CN212848281 U CN 212848281U CN 202022319895 U CN202022319895 U CN 202022319895U CN 212848281 U CN212848281 U CN 212848281U
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- arc extinguishing
- arc
- bars piece
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- extinguishing bars
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Abstract
The utility model relates to an arc extinguishing shield for moulded case circuit breaker, including two arc extinguishing shield curb plates and a plurality of arc extinguishing bars pieces that set up between the arc extinguishing shield curb plate that set up relatively, the arc extinguishing bars piece includes top layer arc extinguishing bars piece, middle arc extinguishing bars piece, bottom arc extinguishing bars piece, the both sides of top layer arc extinguishing bars piece form top layer bars piece card foot respectively, the middle part of top layer arc extinguishing bars piece forms arc-inducing portion to the top of inclining, bars piece card foot in the middle of the both sides of middle arc extinguishing bars piece form respectively, the middle part of middle arc extinguishing bars piece forms V type groove, the bottom in V type groove is convex, the both sides of bottom arc extinguishing bars piece form bottom bars piece card foot respectively, the middle part of bottom arc extinguishing bars piece forms the half slot, be provided with the arc-isolating plate between the arc extinguishing shield curb plate, the arc-isolating plate sets up the slope section in top layer bars piece rear side including the level setting and slope. The utility model discloses an arc extinguishing cover structural design for moulded case circuit breaker is reasonable, has strong, the effectual advantage of arc extinguishing of striking ability.
Description
Technical Field
The utility model relates to a low-voltage apparatus technical field especially relates to an arc-extinguishing chamber for moulded case circuit breaker.
Background
The molded case circuit breaker is one of common circuit protectors and is used for circuit overload and short circuit protection, namely, when a circuit is in a short circuit or overload condition, a tripping mechanism of the molded case circuit breaker automatically cuts off the circuit to protect the circuit. In the process of cutting off a circuit, a large amount of electric arcs can be generated between the moving contact and the fixed contact, the electric arcs are generated along with high temperature and high voltage, if the electric arcs are evacuated and arc-extinguished in time, the molded case circuit breaker can be broken down or even burnt, and the breaking capacity and the service life of the molded case circuit breaker are seriously influenced. The existing arc extinguishing device is difficult to give consideration to high arc extinguishing performance and high arc striking capability, and the damage of the molded case circuit breaker is easily caused due to the poor arc striking capability, so that the service life and the power utilization safety are greatly influenced. Therefore, it is desirable to provide an arc chute for a molded case circuit breaker to solve the aforementioned existing technical problems.
Disclosure of Invention
In view of this, the utility model aims at providing an arc extinguishing chamber for moulded case circuit breaker that structural design is reasonable, the arc extinguishing is effectual, the striking ability is strong.
In order to realize the purpose, the utility model adopts the arc-extinguishing cover for the plastic shell circuit breaker, which comprises two arc-extinguishing cover side plates which are oppositely arranged and a plurality of arc-extinguishing grid pieces which are arranged between the arc-extinguishing cover side plates, the arc extinguishing grid pieces comprise top arc extinguishing grid pieces, middle arc extinguishing grid pieces and bottom arc extinguishing grid pieces, wherein the two sides of the top arc extinguishing grid pieces are respectively provided with a top grid piece clamping pin, the middle parts of the top arc extinguishing grid pieces are obliquely upward to form arc leading parts, the two sides of the middle arc-extinguishing grid plate are respectively provided with a middle grid plate clamping pin, the middle part of the middle arc-extinguishing grid plate is provided with a V-shaped groove, the bottom of the V-shaped groove is arc-shaped, the two sides of the bottom arc-extinguishing grid sheet are respectively provided with a bottom grid sheet clamping pin, the middle part of the bottom arc-extinguishing grid sheet is provided with a semicircular groove, and an arc isolating plate is arranged between the arc extinguishing cover side plates and comprises a horizontal section horizontally arranged above the top layer arc extinguishing grid pieces and an inclined section obliquely arranged at the rear side of the top layer arc extinguishing grid pieces.
Above-mentioned an arc-extinguishing chamber for moulded case circuit breaker is through setting up the ascending arc portion of slope on top layer arc-extinguishing bars piece, the electric arc that produces when making moulded case circuit breaker divide absolutely can be introduced into the arc-extinguishing chamber by arc portion in, the electric arc of introducing the arc-extinguishing chamber is cut apart into short electric arc by middle arc-extinguishing bars piece and is extinguished, V type groove more does benefit to and cuts apart electric arc, the half slot of bottom arc-extinguishing bars piece is convenient for realize further cutting apart remaining electric arc, the setting of arc-insulating board is then for the top of protection top layer arc-extinguishing bars piece, the part at rear does not receive the influence of strong electric arc. The utility model discloses an arc extinguishing cover for moulded case circuit breaker has adopted three kinds of arc extinguishing bars pieces to carry out overall arrangement design, can carry out fine arc extinguishing to electric arc and handle, has the advantage that the striking ability is strong, the arc extinguishing is effectual, carries out the design of flash barrier to the strong arc side moreover, need not to independently install a flash barrier part additional again, has reduced assembly process, has strengthened the protection to moulded case circuit breaker inner part simultaneously, has improved product life.
This practicality further sets up all to form the through-hole on horizontal segment and the slope section, run on arc portion, V type groove, half slot three are the coplanar setting.
The through hole design is used for pressure relief of the electric arc, and the arc striking part, the V-shaped groove and the semicircular groove are arranged on the same plane, so that the electric arc can be better extinguished.
The utility model discloses further set up to all forming the fixture block on top layer bars piece card foot and the middle bars piece card foot, form the card strip on the bottom bars piece card foot, form first calorie of hole and second card hole on the arc-extinguish chamber curb plate respectively, the fixture block is connected respectively in first calorie of hole, and the card strip is connected in the second card hole.
The structure is convenient for assembling the arc-extinguishing chamber, and the overall structure of the arc-extinguishing chamber is firmer.
The utility model discloses further set up to be provided with the one slice for top layer arc extinguishing bars piece, middle arc extinguishing bars piece is provided with eight, and the equidistance sets up between the adjacent middle arc extinguishing bars piece, bottom arc extinguishing bars piece is provided with two, and two bottom arc extinguishing bars piece stack together, top layer arc extinguishing bars piece, middle arc extinguishing bars piece, bottom arc extinguishing bars piece three parallel arrangement.
The eight middle arc-extinguishing grid pieces can cut the arc generated when the moving and static contacts are disconnected into more short arcs to extinguish, so that the voltage between each short arc is smaller, the generated heat is small, the arc-extinguishing cover is not easy to burn out, and the two layers of bottom arc-extinguishing grid pieces stacked together can cut the residual arc more effectively, thereby realizing better arc-extinguishing effect.
Drawings
Fig. 1 is a perspective view of an embodiment of the present invention.
Fig. 2 is a perspective view of another perspective view of the embodiment of the present invention.
Fig. 3 is an exploded view of an embodiment of the present invention.
Fig. 4 is a perspective view of a top arc chute according to an embodiment of the present invention.
Fig. 5 is a perspective view of an intermediate arc chute in an embodiment of the present invention.
Fig. 6 is a perspective view of a bottom arc chute according to an embodiment of the present invention.
Detailed Description
As shown in fig. 1-6, the present invention relates to an arc extinguishing chamber for a molded case circuit breaker, comprising two arc extinguishing chamber side plates 1 arranged oppositely and a plurality of arc extinguishing grid plates 2 arranged between the arc extinguishing chamber side plates 1, wherein each arc extinguishing grid plate 2 comprises a top layer arc extinguishing grid plate 21, eight middle arc extinguishing grid plates 22 and two bottom layer arc extinguishing grid plates 23, the adjacent middle arc extinguishing grid plates 22 are arranged at equal intervals, the two bottom layer arc extinguishing grid plates 23 are stacked together, the top layer arc extinguishing grid plates 21, the middle arc extinguishing grid plates 22 and the bottom layer arc extinguishing grid plates 23 are arranged in parallel, two sides of the top layer arc extinguishing grid plates 21 respectively form top layer grid plate clamping feet 211, the middle part of the top layer arc extinguishing grid plates 21 forms an arc guiding part 212 obliquely upward, two sides of the middle arc extinguishing grid plates 22 respectively form middle grid plate clamping feet 221, the middle part of the middle arc extinguishing grid plates 22 forms a V-shaped groove 222, the bottom of the V-shaped groove 222 is a circular arc, bottom grid card foot 231 is formed respectively to the both sides of bottom arc extinguishing bars piece 23, and the middle part of bottom arc extinguishing bars piece 23 forms half slot 232, arc induction portion 212, V type groove 222, half slot 232 three are the coplanar setting, be provided with arc baffle 3 between the arc extinguishing cover curb plate 1, arc baffle 3 includes that the level sets up the horizontal segment 31 and the slope section 32 of slope setting in top arc extinguishing bars piece 21 rear side above top layer arc extinguishing bars piece 21, all form through-hole 33 on horizontal segment 31 and the slope section 32, all form fixture block (213, 224) on top grid card foot 211 and the middle grid card foot 221, form card strip 233 on bottom grid card foot 231, form first calorie of hole 11 and second calorie of hole 12 on the arc extinguishing cover curb plate 1 respectively, fixture block (213, 224) are connected respectively in first calorie of hole 11, and card strip 233 connects in second calorie of hole 12.
In addition to the above embodiments, there are also other embodiments of the present invention, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and scope of the present invention, and these changes and modifications do not need to be done with the actual labor and are equivalent to the present invention, and these corresponding changes and modifications should be covered by the protection scope of the appended claims.
Claims (4)
1. The utility model provides an arc-extinguishing chamber for moulded case circuit breaker, includes the arc-extinguishing chamber curb plate and a plurality of arc extinguishing bars piece that set up between the arc-extinguishing chamber curb plate of two relative settings, its characterized in that: the arc extinguishing bars piece includes top layer arc extinguishing bars piece, middle arc extinguishing bars piece, bottom arc extinguishing bars piece, the both sides of top layer arc extinguishing bars piece form top layer bars piece card foot respectively, and the middle part of top layer arc extinguishing bars piece forms arc portion to the top that inclines, the both sides of middle arc extinguishing bars piece form middle bars piece card foot respectively, and the middle part of middle arc extinguishing bars piece forms V type groove, and the bottom in V type groove is arc, the both sides of bottom arc extinguishing bars piece form bottom bars piece card foot respectively, and the middle part of bottom arc extinguishing bars piece forms the half slot, be provided with the arc-isolating plate between the arc-extinguishing cover curb plate, the arc-isolating plate sets up the slope section at top layer arc extinguishing bars piece rear side including the level setting in the horizontal segment of top layer arc extinguishing bars piece top and slope setting.
2. The arc chute for a molded case circuit breaker according to claim 1, wherein: the horizontal section and the inclined section are both provided with through holes, and the arc ignition part, the V-shaped groove and the semicircular groove are arranged on the same plane.
3. The arc chute for a molded case circuit breaker according to claim 1 or 2, wherein: the arc extinguishing cover comprises a top layer grid plate clamping pin, a middle layer grid plate clamping pin, clamping blocks, clamping strips, an arc extinguishing cover side plate and clamping strips, wherein the clamping blocks are formed on the top layer grid plate clamping pin and the middle grid plate clamping pin, the clamping strips are formed on the bottom layer grid plate clamping pin, a first clamping hole and a second clamping hole are formed in the arc extinguishing cover side plate respectively, the clamping blocks are connected in the first clamping holes respectively, and the clamping strips are connected in the second.
4. The arc chute for a molded case circuit breaker according to claim 1 or 2, wherein: the top layer arc extinguishing bars are provided with one, middle arc extinguishing bars are provided with eight, and the equidistance sets up between the adjacent middle arc extinguishing bars, bottom arc extinguishing bars are provided with two, and two bottom arc extinguishing bars stack together, top layer arc extinguishing bars, middle arc extinguishing bars, bottom arc extinguishing bars three parallel arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022319895.9U CN212848281U (en) | 2020-10-17 | 2020-10-17 | Arc extinguishing chamber for molded case circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022319895.9U CN212848281U (en) | 2020-10-17 | 2020-10-17 | Arc extinguishing chamber for molded case circuit breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212848281U true CN212848281U (en) | 2021-03-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022319895.9U Active CN212848281U (en) | 2020-10-17 | 2020-10-17 | Arc extinguishing chamber for molded case circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212848281U (en) |
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2020
- 2020-10-17 CN CN202022319895.9U patent/CN212848281U/en active Active
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