CN110071022B - Compact structure's miniature circuit breaker - Google Patents
Compact structure's miniature circuit breaker Download PDFInfo
- Publication number
- CN110071022B CN110071022B CN201910398343.0A CN201910398343A CN110071022B CN 110071022 B CN110071022 B CN 110071022B CN 201910398343 A CN201910398343 A CN 201910398343A CN 110071022 B CN110071022 B CN 110071022B
- Authority
- CN
- China
- Prior art keywords
- magnetic conduction
- magnetic
- conduction sheet
- cavity
- sheet
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 230000005291 magnetic effect Effects 0.000 claims abstract description 108
- 238000002955 isolation Methods 0.000 claims description 15
- 239000000758 substrate Substances 0.000 claims description 14
- 238000004880 explosion Methods 0.000 claims description 4
- 238000009434 installation Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract 1
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010891 electric arc Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005056 compaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H73/00—Protective overload circuit-breaking switches in which excess current opens the contacts by automatic release of mechanical energy stored by previous operation of a hand reset mechanism
- H01H73/02—Details
- H01H73/18—Means for extinguishing or suppressing arc
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/30—Means for extinguishing or preventing arc between current-carrying parts
- H01H9/44—Means for extinguishing or preventing arc between current-carrying parts using blow-out magnet
Abstract
A compact miniature circuit breaker. The main 4 magnetic conduction boards that are equipped with in solving present miniature circuit breaker have increased the cost like this on the one hand, on the other hand also comparatively bloated problem structurally. The method is characterized in that: be equipped with first magnetic conduction piece (61), second magnetic conduction piece (62) and third magnetic conduction piece (63) in the casing, be equipped with recess (21) on the base plate, first magnetic conduction piece is located in recess (21), the second magnetic conduction piece is located in the first cavity, the third magnetic conduction piece is located in the second cavity, first magnetic conduction piece with form first magnetic field between the second magnetic conduction piece, first magnetic conduction piece with form the second magnetic field between the third magnetic conduction piece. The invention provides a compact-structure miniature circuit breaker, wherein a first magnetic field is formed between a first magnetic conduction sheet and between a second magnetic conduction sheet, and a second magnetic field is formed between the first magnetic conduction sheet and a third magnetic conduction sheet, so that one magnetic conduction sheet is omitted, and the cost and the installation space are saved.
Description
Technical Field
The invention belongs to the field of circuit breakers, and particularly relates to a small circuit breaker with a compact structure.
Background
Each unit of the miniature circuit breaker comprises a shell and an operating handle, wherein an operating mechanism, a tripper, a contact system, an arc extinguishing system, an overcurrent protection system and a short circuit protection system are arranged in the shell. The operating mechanism drives the moving contact in the contact system to move through the operating handle, so that the miniature circuit breaker is switched on and off, and the control of an electric circuit is realized; by sensing the current thermal effect and the magnetic effect, the protection is implemented when the electrical circuit is overloaded, short-circuited and other faults occur.
When the movable contact and the fixed contact are in contact and have enough contact pressure, the miniature circuit breaker is connected with an electrical loop, the local temperature change of the miniature circuit breaker is sensed through the bimetal element, the current of the loop system is judged, and the overcurrent protection function is realized. When the loop current is kept at or below the rated current value set by the miniature circuit breaker, the thermal effect generated by the current causes the deformation of the metal element to be small and the release cannot be released; when the loop current exceeds the set rated current, the temperature of the metal element of the miniature circuit breaker is raised, enough thermal deformation can be generated, the trip is pushed to trip, at the moment, the movable contact and the fixed contact in the contact system are separated, the current loop is cut off, and the current protection function is realized.
The short-circuit protection system is characterized in that the electromagnetic coil senses the change of loop current, when the loop current exceeds a normal value or is above a set short-circuit protection value, the electromagnetic force generated by the electromagnetic coil enables the movable iron core to push the push rod and act on the release, so that the release is tripped, a current loop is cut off, and a short-circuit protection function is realized.
The arc extinguishing system has the function of limiting the trend of the current to continue to increase, namely the current limiting function, through the function of the electric arc when the miniature circuit breaker breaks the overlarge short-circuit current, and finally extinguishing the electric arc. When the arc is introduced into the arc-extinguishing chamber, the metal grid sheet in the arc-extinguishing chamber is divided into a plurality of sections, and each section of arc generates a near-pole voltage near the metal grid sheet, so that the voltage drop of the whole arc is rapidly improved, and the arc is extinguished.
Traditional miniature circuit breaker generally includes the casing, the casing include upper cover, well shell and bottom, the setting of well shell is for more convenient installation operating device and contact system, well shell divide into N utmost point chamber and L utmost point chamber with the casing inner chamber, present miniature circuit breaker is equipped with the magnetic conduction board in order to increase the arc extinguishing effect mostly, is equipped with 4 magnetic conduction boards (N utmost point two, L utmost point two) in the miniature circuit breaker of usually, has increased the cost like this on the one hand, on the other hand also comparatively bloated structurally.
Disclosure of Invention
In order to overcome the defects of the background technology, the invention provides the small circuit breaker with a compact structure, and mainly solves the problems that the cost is increased on one hand and the structure is relatively bulky on the other hand due to the fact that 4 magnetic conduction plates are arranged in the conventional small circuit breaker.
The technical scheme adopted by the invention is as follows:
the utility model provides a compact structure's miniature circuit breaker, includes the casing, the casing includes the base plate, the base plate with form first cavity between the casing one side inner wall, the base plate with form the second cavity between the casing opposite side inner wall, be equipped with first explosion chamber in the first cavity, be equipped with the second explosion chamber in the second cavity, be equipped with first magnetic conduction piece, second magnetic conduction piece and third magnetic conduction piece in the casing, be equipped with the recess on the base plate, first magnetic conduction piece is located in the recess, the second magnetic conduction piece is located in the first cavity, the third magnetic conduction piece is located in the second cavity, first magnetic conduction piece with form first magnetic field between the second magnetic conduction piece, first magnetic conduction piece with form the second magnetic field between the third magnetic conduction piece.
The magnetic plate is characterized by further comprising an arc isolation cover detachably connected with the substrate, and a fixing groove for placing the first magnetic conduction sheet is formed between the arc isolation cover and the inner wall of the bottom of the groove.
The inner wall of the groove is provided with a fixed seat and also comprises a fixed piece in threaded connection with the fixed seat, and the fixed piece is in abutting fit with the top of the arc isolation cover.
The first magnetic conduction sheet is provided with a plurality of positioning holes, and the bottom of the arc isolation cover is provided with positioning pins in clearance fit with the positioning holes.
The arc isolation cover comprises a top plate and a side plate, the bottom of the side plate is in contact with the inner wall of the bottom of the groove, and the locating pin is arranged on the inner wall of the top plate.
The distance h1 between the first magnetic conductive sheet and the second magnetic conductive sheet is equal to the distance h2 between the first magnetic conductive sheet and the third magnetic conductive sheet.
The substrate comprises a first plate and a second plate, the top end face of the second plate is lower than the top end face of the first plate, and the groove is formed in the second plate.
The front cover and the rear cover are detachably connected, the first cavity is formed between the front cover and the substrate, and the second cavity is formed between the rear cover and the substrate.
The second magnetic conduction sheet is connected with the front cover, and the third magnetic conduction sheet is connected with the rear cover.
The beneficial effects of the invention are as follows: the invention provides a compact-structure miniature circuit breaker, wherein a first magnetic field is formed between a first magnetic conduction sheet and between a second magnetic conduction sheet, and a second magnetic field is formed between the first magnetic conduction sheet and a third magnetic conduction sheet, so that one magnetic conduction sheet is omitted, and the cost and the installation space are saved.
Drawings
Fig. 1 is a schematic perspective view of an embodiment of the present invention.
Fig. 2 is an exploded view of one embodiment of the present invention.
FIG. 3 is a schematic cross-sectional view of one embodiment of the present invention.
Fig. 4 is an enlarged schematic view at a in fig. 3.
Fig. 5 is a perspective view of an arc shield according to one embodiment of the present invention.
Fig. 6 is a perspective view of a substrate according to an embodiment of the present invention.
FIG. 7 is a schematic partial cross-sectional view of one embodiment of the invention.
Detailed Description
The invention is further described below with reference to the accompanying drawings: as shown in the figure, the miniature circuit breaker with compact structure comprises a shell 1, the shell comprises a substrate 2, a first cavity 3 is formed between the substrate and the inner wall on one side of the shell, a second cavity 4 is formed between the substrate and the inner wall on the other side of the shell, a first arc-extinguishing chamber 51 is arranged in the first cavity, a second arc-extinguishing chamber 52 is arranged in the second cavity, a first magnetic conduction sheet 61, a second magnetic conduction sheet 62 and a third magnetic conduction sheet 63 are arranged in the shell, a groove 21 is formed in the substrate, the first magnetic conduction sheet is arranged in the groove 21, the second magnetic conduction sheet is arranged in the first cavity, the third magnetic conduction sheet is arranged in the second cavity, a first magnetic field is formed between the first magnetic conduction sheet and the second magnetic conduction sheet, and a second magnetic field is formed between the first magnetic conduction sheet and the third magnetic conduction sheet.
The groove can be a sinking groove, and thus the first magnetic conduction sheet is arranged at the bottom of the sinking groove and can be a through groove, and thus the first magnetic conduction sheet is clamped or adhered with the circumferential inner wall of the groove, so that the first magnetic conduction sheet and the second magnetic conduction sheet and the first magnetic conduction sheet and the third magnetic conduction sheet all generate magnetic fields, one magnetic conduction sheet is omitted, and the cost and the installation space are saved.
In this embodiment, as shown in the figure, the device further includes an arc isolation cover 7 detachably connected with the substrate, and a fixing groove for placing the first magnetic conductive sheet is formed between the arc isolation cover and the inner wall of the bottom of the groove. The first magnetic conduction sheet is arranged in the fixed groove, so that electric arcs are prevented from contacting the first magnetic conduction sheet, and the first magnetic conduction sheet is protected.
In this embodiment, as shown in the drawing, the inner wall of the groove is provided with a fixing seat 211, and further includes a fixing member screwed with the fixing seat, where the fixing member is in press fit with the top of the arc isolation cover. The arc-isolating cover is provided with a through hole 703 for the fixing seat to pass through, the fixing piece can be a screw, the screw rod of the screw is connected with the fixing seat, and the diameter of the top of the screw is larger than that of the through hole and is pressed on the arc-isolating cover for compaction.
In this embodiment, as shown in the figure, the first magnetic conductive sheet is provided with a plurality of positioning holes 611, and the bottom of the arc isolation cover is provided with positioning pins 71 in clearance fit with the positioning holes. After the arc isolation cover is installed, the locating pin is inserted into the locating hole to prevent the first magnetic conduction piece from rotating.
In this embodiment, as shown in the figure, the arc isolation cover includes a top plate 701 and a side plate 702, the bottom of the side plate is in contact with the inner wall of the bottom of the groove, and the positioning pin is disposed on the inner wall of the top plate. The outer wall of curb plate corresponds the setting with the circumference inner wall of recess.
In this embodiment, as shown in the drawing, a distance h1 between the first magnetic conductive sheet and the second magnetic conductive sheet is equal to a distance h2 between the first magnetic conductive sheet and the third magnetic conductive sheet.
In this embodiment, as shown in the figure, the substrate includes a first plate 201 and a second plate 202, where the top end surface of the second plate is lower than the top end surface of the first plate, and the groove is formed on the second plate.
In this embodiment, as shown in the drawing, the base plate is provided with a front cover 101 and a rear cover 102 that are detachably connected, the first cavity 3 is formed between the front cover and the base plate, and the second cavity is formed between the rear cover and the base plate.
In this embodiment, as shown in the drawing, the second magnetic conductive sheet is connected to the front cover, and the third magnetic conductive sheet is connected to the rear cover. The second magnetic conductive sheet is connected with the front cover, and the connection mode of the third magnetic conductive sheet and the rear cover can be the same as the installation structure of the first magnetic conductive sheet, namely, the mode of arc isolation cover and installation seat and fastener installation is adopted.
In the description of the present invention, it should be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
The embodiments described with reference to the drawings are exemplary and intended to be illustrative of the invention and should not be construed as limiting the invention. The examples should not be construed as limiting the invention, but any modifications based on the spirit of the invention should be within the scope of the invention.
Claims (5)
1. The utility model provides a compact structure's miniature circuit breaker, includes casing (1), the casing includes base plate (2), the base plate with form first cavity (3) between casing one side inner wall, the base plate with form second cavity (4) between the casing opposite side inner wall, be equipped with first explosion chamber (51) in the first cavity, be equipped with second explosion chamber (52) in the second cavity, its characterized in that: a first magnetic conduction sheet (61), a second magnetic conduction sheet (62) and a third magnetic conduction sheet (63) are arranged in the shell, a groove (21) is formed in the substrate, the first magnetic conduction sheet is arranged in the groove (21), the second magnetic conduction sheet is arranged in the first cavity, the third magnetic conduction sheet is arranged in the second cavity, a first magnetic field is formed between the first magnetic conduction sheet and the second magnetic conduction sheet, and a second magnetic field is formed between the first magnetic conduction sheet and the third magnetic conduction sheet;
the magnetic shielding device also comprises an arc shielding cover (7) detachably connected with the substrate, and a fixing groove for placing the first magnetic conduction sheet is formed between the arc shielding cover and the inner wall of the bottom of the groove;
the inner wall of the groove is provided with a fixed seat (211) and also comprises a fixed piece in threaded connection with the fixed seat, and the fixed piece is in abutting fit with the top of the arc isolation cover;
the distance h1 between the first magnetic conductive sheet and the second magnetic conductive sheet is equal to the distance h2 between the first magnetic conductive sheet and the third magnetic conductive sheet;
the substrate comprises a first plate (201) and a second plate (202), the top end face of the second plate is lower than the top end face of the first plate, and the groove is formed in the second plate.
2. A compact miniature circuit breaker according to claim 1 wherein: the first magnetic conductive sheet is provided with a plurality of positioning holes (611), and the bottom of the arc isolation cover is provided with positioning pins (71) in clearance fit with the positioning holes.
3. A compact miniature circuit breaker according to claim 2 wherein: the arc isolation cover comprises a top plate (701) and side plates (702), the bottoms of the side plates are in contact with the inner walls of the bottoms of the grooves, and the positioning pins are arranged on the inner walls of the top plate.
4. A compact miniature circuit breaker according to claim 1 wherein: the base plate is provided with a front cover (101) and a rear cover (102) which are detachably connected, a first cavity (3) is formed between the front cover and the base plate, and a second cavity is formed between the rear cover and the base plate.
5. The compact size miniature circuit breaker of claim 4, wherein: the second magnetic conduction sheet is connected with the front cover, and the third magnetic conduction sheet is connected with the rear cover.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398343.0A CN110071022B (en) | 2019-05-14 | 2019-05-14 | Compact structure's miniature circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910398343.0A CN110071022B (en) | 2019-05-14 | 2019-05-14 | Compact structure's miniature circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110071022A CN110071022A (en) | 2019-07-30 |
| CN110071022B true CN110071022B (en) | 2023-11-07 |
Family
ID=67370708
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910398343.0A Active CN110071022B (en) | 2019-05-14 | 2019-05-14 | Compact structure's miniature circuit breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110071022B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012035741A1 (en) * | 2010-09-15 | 2012-03-22 | 富士電機機器制御株式会社 | Circuit breaker |
| WO2016008298A1 (en) * | 2014-07-17 | 2016-01-21 | 正泰集团股份有限公司 | Operation device of multi-pole miniature circuit breaker |
| CN205140912U (en) * | 2015-11-13 | 2016-04-06 | 浙江圣曦电气股份有限公司 | Miniature circuit breaker |
| CN205657036U (en) * | 2016-04-29 | 2016-10-19 | 上海良信电器股份有限公司 | Miniature circuit breaker's arc blow -out mechanism |
| CN107230586A (en) * | 2016-04-29 | 2017-10-03 | 上海良信电器股份有限公司 | A kind of miniature circuit breaker structure-improved |
| CN107230602A (en) * | 2016-04-29 | 2017-10-03 | 上海良信电器股份有限公司 | A kind of arc blow-out mechanism of miniature circuit breaker |
| WO2017166797A1 (en) * | 2016-03-30 | 2017-10-05 | 浙江正泰电器股份有限公司 | Miniature circuit breaker |
| WO2017206580A1 (en) * | 2016-05-31 | 2017-12-07 | 乐清市也为电气有限公司 | Miniature circuit breaker |
-
2019
- 2019-05-14 CN CN201910398343.0A patent/CN110071022B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012035741A1 (en) * | 2010-09-15 | 2012-03-22 | 富士電機機器制御株式会社 | Circuit breaker |
| WO2016008298A1 (en) * | 2014-07-17 | 2016-01-21 | 正泰集团股份有限公司 | Operation device of multi-pole miniature circuit breaker |
| CN205140912U (en) * | 2015-11-13 | 2016-04-06 | 浙江圣曦电气股份有限公司 | Miniature circuit breaker |
| WO2017166797A1 (en) * | 2016-03-30 | 2017-10-05 | 浙江正泰电器股份有限公司 | Miniature circuit breaker |
| CN205657036U (en) * | 2016-04-29 | 2016-10-19 | 上海良信电器股份有限公司 | Miniature circuit breaker's arc blow -out mechanism |
| CN107230586A (en) * | 2016-04-29 | 2017-10-03 | 上海良信电器股份有限公司 | A kind of miniature circuit breaker structure-improved |
| CN107230602A (en) * | 2016-04-29 | 2017-10-03 | 上海良信电器股份有限公司 | A kind of arc blow-out mechanism of miniature circuit breaker |
| WO2017206580A1 (en) * | 2016-05-31 | 2017-12-07 | 乐清市也为电气有限公司 | Miniature circuit breaker |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110071022A (en) | 2019-07-30 |
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Address after: 325600 No. 18, Sha Hung Road, North Bai Xiang Town, Yueqing, Wenzhou, Zhejiang. Patentee after: Zhejiang Chuangqi Electric Co.,Ltd. Address before: 325600 No. 18, Sha Hung Road, North Bai Xiang Town, Yueqing, Wenzhou, Zhejiang. Patentee before: ZHEJIANG CHUANGQI ELECTRIC Co.,Ltd. |
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