CN113921347A - Static contact arc extinguishing module of circuit breaker - Google Patents

Static contact arc extinguishing module of circuit breaker Download PDF

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Publication number
CN113921347A
CN113921347A CN202111019673.8A CN202111019673A CN113921347A CN 113921347 A CN113921347 A CN 113921347A CN 202111019673 A CN202111019673 A CN 202111019673A CN 113921347 A CN113921347 A CN 113921347A
Authority
CN
China
Prior art keywords
arc extinguishing
arc
circuit breaker
static contact
shell
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.)
Withdrawn
Application number
CN202111019673.8A
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Chinese (zh)
Inventor
支朝乾
薛焱淼
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yueqing Haige Iot Technology Co ltd
Original Assignee
Yueqing Haige Iot Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yueqing Haige Iot Technology Co ltd filed Critical Yueqing Haige Iot Technology Co ltd
Priority to CN202111019673.8A priority Critical patent/CN113921347A/en
Publication of CN113921347A publication Critical patent/CN113921347A/en
Withdrawn legal-status Critical Current

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    • 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
    • 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
    • H01H73/04—Contacts

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  • Arc-Extinguishing Devices That Are Switches (AREA)
  • Breakers (AREA)

Abstract

The invention relates to a static contact arc extinguishing module of a circuit breaker, which comprises a static contact and an arc extinguishing component arranged on the static contact, wherein the arc extinguishing component comprises a housing with an arc extinguishing cavity, a plurality of arc extinguishing grids arranged in the housing respectively and an arc isolating piece, a through hole matched with the motion track of a moving contact is arranged on one side of the housing, a protective plate is arranged in the through hole, arc discharge holes are formed in the housing corresponding to the upper ends of the arc extinguishing grids, a U-shaped contact part inserted in the arc extinguishing cavity is arranged at one end of the static contact corresponding to the lower ends of the arc extinguishing grids, a static contact is arranged on the U-shaped contact part, a wiring part extending out of the housing is arranged at the other end of the static contact, and a magnetic increasing piece is arranged in the housing corresponding to the lower part of the static contact. The circuit breaker has the advantages of simple structure, stable and reliable performance, convenient assembly, effective prolonging of the service life of the circuit breaker and improvement of the breaking capacity of the circuit breaker.

Description

Static contact arc extinguishing module of circuit breaker
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a static contact arc extinguishing module of a circuit breaker.
Background
The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition for a predetermined time. The circuit breaker has overload, short circuit and under-voltage protection functions, can protect lines and power supply equipment from being damaged, and can protect fire hazards possibly caused by long-term grounding faults which cannot be detected by overcurrent protection. Moulded case circuit breaker includes plastic housing, operating device, contact system, arc extinguishing system, and current moulded case circuit breaker's arc extinguishing system structural design is unreasonable, and this arc extinguishing system's structural design can not integrated modularization, and it is convenient inadequately to assemble, and this arc extinguishing system can not lengthen electric arc, realizes the quick cooling of electric arc to it is unsatisfactory to lead to its arc extinguishing effect, and the contact is burnt and is decreased easily, thereby the breaking capacity of circuit breaker is lower.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides the static contact arc-extinguishing module which is simple in structure, stable and reliable in performance, convenient and fast to assemble, and capable of effectively prolonging the service life of a circuit breaker and improving the breaking capacity of the circuit breaker.
In order to achieve the above purpose, the invention adopts a static contact arc extinguishing module of a circuit breaker, which comprises a static contact and an arc extinguishing component arranged on the static contact, wherein the arc extinguishing component comprises a housing with an arc extinguishing cavity, a plurality of arc extinguishing grids and arc isolating pieces, the arc extinguishing grids and the arc isolating pieces are respectively arranged in the housing, a through hole matched with a motion track of a moving contact is arranged on one side of the housing, an arc isolating plate is arranged in the through hole, an arc discharging hole is arranged at the upper end of the housing corresponding to the arc extinguishing grids, a U-shaped contact part penetrating in the arc extinguishing cavity is arranged at one end of the static contact corresponding to the lower end of the arc extinguishing grids, a static contact is arranged on the U-shaped contact part, the other end of the static contact is provided with a wiring part extending outside the housing, and a magnetic increasing piece is arranged in the housing corresponding to the lower part of the static contact.
The beneficial effect of above-mentioned structure is: the static contact arc extinguishing module adopts a modular structure design, so that the modular assembly of the static contact arc extinguishing module can be realized, and the assembly is more convenient. And the housing adopts closed structural design, the upper end of housing is provided with the arc hole that leaks that the arc extinguishing chamber is linked together, the arc hole can play the pressure release, the exhaust effect, and increase the below department that the magnetic sheet set up at the stationary contact, can produce bigger magnetic field, the magnetism blows the effect better, and can blow in a plurality of arc extinguishing and delete the piece with electric arc, electric arc can be followed a plurality of arc extinguishing and delete the piece and remove to leaking the arc hole direction, electric arc is elongated fast from bottom to top, thereby can realize the quick cooling of electric arc, thereby reach the quick extinguishing of electric arc, thereby can strengthen the arc extinguishing effect of this static contact arc extinguishing module. Therefore, the static contact arc extinguishing module of the circuit breaker has the advantages of simple structure, stable and reliable performance, convenience and quickness in assembly, capability of effectively prolonging the service life of the circuit breaker and improvement on breaking capacity of the circuit breaker.
Particularly, the arc isolating piece is provided with an arc isolating piece corresponding to two sides of the stationary contact respectively, an arc isolating channel is formed between the two arc isolating pieces, one side of each arc extinguishing deletion piece is provided with an arc extinguishing groove respectively, an arc extinguishing channel is formed between the arc extinguishing grooves of the arc extinguishing deletion pieces, and the arc isolating channel is communicated with the arc extinguishing channel. The arc isolating channel of the arc isolating piece can lead the electric arc at the static contact and the moving contact into the arc extinguishing channel quickly, so that the electric arc can be extinguished quickly, and the arc extinguishing performance of the static contact arc extinguishing module can be improved.
Particularly, an arc striking angle is arranged on the tail part of the U-shaped contact part, and one end of the arc striking angle bends and extends into the arc extinguishing channel. The arc striking angle can lead the arc into the arc extinguishing channel quickly, thereby achieving the purpose of quickly extinguishing the arc.
Particularly, one end of the U-shaped contact part and one end of the housing are respectively provided with a positioning hole matched with the circuit breaker base, a positioning column matched with the positioning hole is arranged in the circuit breaker base, and the positioning column is inserted into the positioning hole and forms clamping fit of the fixed contact, the housing and the circuit breaker base. The fixed contact, the housing and the positioning column of the circuit breaker base are clamped, so that the fixed contact module and the circuit breaker base are conveniently assembled in a modularized mode, and the assembly efficiency of the fixed contact arc extinguishing module is improved.
Particularly, the other end of the housing is inserted into a positioning groove of the upper cover of the circuit breaker and forms clamping fit of the housing and the upper cover of the circuit breaker. The housing is clamped in the upper cover of the circuit breaker, and the housing can be fastened in the base of the circuit breaker by the upper cover, so that the static contact arc extinguishing module can be assembled conveniently.
Particularly, the housing include first shell, set up the second shell on first shell, first shell and second shell between be formed with the arc extinguishing chamber, the both sides of first shell on be provided with the fixture block respectively, the second shell on be provided with fixture block matched with card hole, the fixture block in the card hole, and constitute the joint cooperation of first shell and second shell. First shell adopts the joint cooperation mode with the second shell to be connected to be convenient for the assembly of first shell and second shell, thereby be favorable to improving the assembly efficiency of this housing.
Particularly, a first accommodating groove is formed in the first shell and below the first shell corresponding to the stationary contact, a second accommodating groove matched with the first accommodating groove is formed in the second shell, when the first shell is clamped with the second shell, the first accommodating groove and the second accommodating groove are spliced to form an accommodating cavity, and the magnetism increasing sheet is arranged in the accommodating cavity. Increase the magnetic sheet setting in the holding intracavity to be convenient for increase the assembly of magnetic sheet and first shell, second shell, the assembly is more convenient.
Particularly, the outer wall of first shell, second shell on be provided with the joint sand grip respectively, correspond joint sand grip department in the circuit breaker base and be provided with the joint groove, joint sand grip block in the joint inslot, and constitute the joint cooperation of first shell, second shell and circuit breaker base. Be provided with the joint sand grip of block in the circuit breaker base on first shell, the second shell, the assembly of first shell, second shell and circuit breaker base of being convenient for to be favorable to realizing the modularization assembly of this static contact arc extinguishing module.
Drawings
Fig. 1 is a cross-sectional view of a circuit breaker according to an embodiment of the present invention.
Fig. 2 is a perspective view of an embodiment of the present invention.
Fig. 3 is a cross-sectional view of an embodiment of the present invention.
Fig. 4 is an exploded view of an embodiment of the present invention.
Detailed Description
As shown in fig. 1 to 4, an embodiment of the invention is a static contact arc extinguishing module of a circuit breaker, including a static contact 10, an arc extinguishing assembly 20 disposed on the static contact 10, the arc extinguishing assembly 20 comprises a housing 21 with an arc extinguishing chamber 210, a plurality of arc extinguishing grids 22 and arc separating pieces 23 which are respectively arranged in the housing 21, one side of the housing 21 is provided with a through hole 211 matched with the motion track of the movable contact, the guard plate 23 is arranged in the through hole 211, the cover 21 is provided with arc discharge holes 212 corresponding to the upper ends of the arc-extinguishing grids 22, one end of the static contact 10 corresponding to the lower ends of the arc-extinguishing grid pieces 22 is provided with a U-shaped contact part 11 inserted in the arc-extinguishing chamber 210, and a fixed contact 12 is arranged on the U-shaped contact part 11, the other end of the fixed contact 10 is provided with a wiring part 13 extending outside the housing 21, and a magnetism increasing sheet 14 is arranged in the housing 21 and below the fixed contact 12.
The arc isolating piece 23 is provided with an arc isolating piece 231 on two sides corresponding to the stationary contact 12, an arc isolating channel 230 is formed between the two arc isolating pieces 231, one side of each arc extinguishing deletion piece 22 is provided with an arc extinguishing groove 221, an arc extinguishing channel 220 is formed between the arc extinguishing grooves 221 of the arc extinguishing deletion pieces 22, and the arc isolating channel 230 is communicated with the arc extinguishing channel 220. The arc isolating channel of the arc isolating piece can lead the electric arc at the static contact and the moving contact into the arc extinguishing channel quickly, so that the electric arc can be extinguished quickly, and the arc extinguishing performance of the static contact arc extinguishing module can be improved. An arc striking angle 111 is arranged on the tail part of the U-shaped contact part 11, and one end of the arc striking angle 11 bends and extends into the arc extinguishing channel 220. The arc striking angle can lead the arc into the arc extinguishing channel quickly, thereby achieving the purpose of quickly extinguishing the arc.
As shown in fig. 1, one end of the U-shaped contact portion 11 and one end of the housing 21 are respectively provided with a positioning hole 300 matched with the circuit breaker base 30, a positioning column 301 matched with the positioning hole 300 is arranged in the circuit breaker base 30, and the positioning column 301 is inserted into the positioning hole 300 and forms a clamping fit of the static contact 10, the housing 21 and the circuit breaker base 30. The fixed contact, the housing and the positioning column of the circuit breaker base are clamped, so that the fixed contact module and the circuit breaker base are conveniently assembled in a modularized mode, and the assembly efficiency of the fixed contact arc extinguishing module is improved. The other end of the housing 21 is inserted into the positioning groove 311 of the upper cover 31 of the circuit breaker, and the housing 21 and the upper cover 31 of the circuit breaker are in clamping fit. The housing is clamped in the upper cover of the circuit breaker, and the housing can be fastened in the base of the circuit breaker by the upper cover, so that the static contact arc extinguishing module can be assembled conveniently.
As shown in fig. 3 and 4, the housing 21 includes a first housing 213 and a second housing 214 disposed on the first housing 213, the arc extinguishing chamber 210 is formed between the first housing 213 and the second housing 214, two sides of the first housing 213 are respectively provided with a latch 2131, the second housing 214 is provided with a latch hole 2141 engaged with the latch 2131, and the latch 2131 is latched in the latch hole 2141 to form a snap fit between the first housing 213 and the second housing 214. First shell adopts the joint cooperation mode with the second shell to be connected to be convenient for the assembly of first shell and second shell, thereby be favorable to improving the assembly efficiency of this housing. A first receiving groove 2132 is formed in the first housing 213 below the stationary contact 12, a second receiving groove 2142 matched with the first receiving groove 2132 is formed in the second housing 214, when the first housing 213 is engaged with the second housing 214, the first receiving groove 2131 and the second receiving groove 2142 are engaged to form a receiving cavity 2100, and the magnetization increasing sheet 14 is disposed in the receiving cavity 2100. Increase the magnetic sheet setting in the holding intracavity to be convenient for increase the assembly of magnetic sheet and first shell, second shell, the assembly is more convenient. First shell 213, second shell 214's outer wall on be provided with joint sand grip 2110 respectively, correspond joint sand grip 2110 department in the circuit breaker base 30 and be provided with joint groove 302, joint sand grip 2110 block in joint groove 302, and constitute the joint cooperation of first shell 213, second shell 214 and circuit breaker base 30. Be provided with the joint sand grip of block in the circuit breaker base on first shell, the second shell, the assembly of first shell, second shell and circuit breaker base of being convenient for to be favorable to realizing the modularization assembly of this static contact arc extinguishing module.
The static contact arc extinguishing module adopts a modular structure design, so that the modular assembly of the static contact arc extinguishing module can be realized, and the assembly is more convenient. And the housing adopts closed structural design, the upper end of housing is provided with the arc hole that leaks that the arc extinguishing chamber is linked together, the arc hole can play the pressure release, the exhaust effect, and increase the below department that the magnetic sheet set up at the stationary contact, can produce bigger magnetic field, the magnetism blows the effect better, and can blow in a plurality of arc extinguishing and delete the piece with electric arc, electric arc can be followed a plurality of arc extinguishing and delete the piece and remove to leaking the arc hole direction, electric arc is elongated fast from bottom to top, thereby can realize the quick cooling of electric arc, thereby reach the quick extinguishing of electric arc, thereby can strengthen the arc extinguishing effect of this static contact arc extinguishing module. Therefore, the static contact arc extinguishing module of the circuit breaker has the advantages of simple structure, stable and reliable performance, convenience and quickness in assembly, capability of effectively prolonging the service life of the circuit breaker and improvement on breaking capacity of the circuit breaker.

Claims (8)

1. The utility model provides a static contact arc extinguishing module of circuit breaker, includes the static contact, sets up the arc extinguishing subassembly on the static contact, its characterized in that: the arc extinguishing component comprises a housing with an arc extinguishing cavity, a plurality of arc extinguishing grids and an arc isolating piece, wherein the arc extinguishing grids and the arc isolating piece are respectively arranged in the housing, one side of the housing is provided with a through hole matched with a motion track of the moving contact, the arc isolating plate is arranged in the through hole, the housing is provided with an arc discharge hole corresponding to the upper ends of the arc extinguishing grids, one end of the static contact corresponds to the lower end of the arc extinguishing grids and is provided with a U-shaped contact portion penetrating in the arc extinguishing cavity, a static contact is arranged on the U-shaped contact portion, the other end of the static contact is provided with a wiring portion extending out of the housing, and a magnetic increasing piece is arranged below the housing corresponding to the static contact.
2. The static contact arc extinguishing module of the circuit breaker of claim 1, characterized in that: the arc-isolating piece on correspond both sides department of stationary contact and be provided with an arc-isolating piece respectively, and be formed with the arc-isolating passageway between two arc-isolating pieces, one side of a plurality of arc extinguishing to delete the piece on be provided with the arc extinguishing groove respectively, the arc extinguishing groove of a plurality of arc extinguishing to delete the piece between be formed with the arc extinguishing passageway, the arc-isolating passageway be linked together with the arc extinguishing passageway.
3. The static contact arc extinguishing module of the circuit breaker according to claim 1 or 2, characterized in that: and an arc striking angle is arranged on the tail part of the U-shaped contact part, and one end of the arc striking angle is bent and extends into the arc extinguishing channel.
4. The static contact arc extinguishing module of the circuit breaker according to claim 1 or 2, characterized in that: one end of the U-shaped contact part and the housing are respectively provided with a positioning hole matched with the circuit breaker base, a positioning column matched with the positioning hole is arranged in the circuit breaker base, and the positioning column is inserted into the positioning hole and forms clamping fit of the static contact, the housing and the circuit breaker base.
5. The static contact arc extinguishing module of the circuit breaker according to claim 1 or 2, characterized in that: the other end of the housing is inserted into the positioning groove of the upper cover of the circuit breaker and forms clamping fit of the housing and the upper cover of the circuit breaker.
6. The static contact arc extinguishing module of the circuit breaker according to claim 1 or 2, characterized in that: the housing include first shell, set up the second shell on first shell, first shell and second shell between be formed with the arc-extinguishing chamber, the both sides of first shell on be provided with the fixture block respectively, the second shell on be provided with fixture block matched with card hole, the fixture block in the card hole, and constitute the joint cooperation of first shell and second shell.
7. The static contact arc extinguishing module of the circuit breaker of claim 6, wherein: the first shell is internally provided with a first containing groove corresponding to the lower part of the static contact, the second shell is internally provided with a second containing groove matched with the first containing groove, when the first shell is clamped with the second shell, the first containing groove and the second containing groove are spliced and form a containing cavity, and the magnetism increasing sheet is arranged in the containing cavity.
8. The static contact arc extinguishing module of the circuit breaker of claim 6, wherein: the outer wall of first shell, second shell on be provided with the joint sand grip respectively, correspond joint sand grip department in the circuit breaker base and be provided with the joint groove, joint sand grip block at the joint inslot, and constitute the joint cooperation of first shell, second shell and circuit breaker base.
CN202111019673.8A 2020-06-01 2021-09-01 Static contact arc extinguishing module of circuit breaker Withdrawn CN113921347A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202111019673.8A CN113921347A (en) 2020-06-01 2021-09-01 Static contact arc extinguishing module of circuit breaker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202063032864P 2020-06-01 2020-06-01
CN202111019673.8A CN113921347A (en) 2020-06-01 2021-09-01 Static contact arc extinguishing module of circuit breaker

Publications (1)

Publication Number Publication Date
CN113921347A true CN113921347A (en) 2022-01-11

Family

ID=80442331

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202111019673.8A Withdrawn CN113921347A (en) 2020-06-01 2021-09-01 Static contact arc extinguishing module of circuit breaker

Country Status (1)

Country Link
CN (1) CN113921347A (en)

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Application publication date: 20220111

WW01 Invention patent application withdrawn after publication