CN107293458A - Miniature circuit breaker - Google Patents
Miniature circuit breaker Download PDFInfo
- Publication number
- CN107293458A CN107293458A CN201610192404.4A CN201610192404A CN107293458A CN 107293458 A CN107293458 A CN 107293458A CN 201610192404 A CN201610192404 A CN 201610192404A CN 107293458 A CN107293458 A CN 107293458A
- Authority
- CN
- China
- Prior art keywords
- arc
- chutes
- gas
- gas outlet
- arc extinguishing
- 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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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
- H01H9/34—Stationary parts for restricting or subdividing the arc, e.g. barrier plate
- H01H9/342—Venting arrangements for arc chutes
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- Arc-Extinguishing Devices That Are Switches (AREA)
- Breakers (AREA)
Abstract
Miniature circuit breaker, including the housing provided with gas outlet, multiple arc extinguishing grid pieces are arranged in arc-chutes, and arc-chutes are fixedly connected with the casing；Exhaust outlet is provided with the back side panel of arc-chutes, rearmounted arc extinguishing structure is provided between the exhaust outlet of arc-chutes and the venthole of housing, described rearmounted arc extinguishing structure includes the multiple gas channels being arranged between the exhaust outlet of arc-chutes and the venthole of housing, so that the high temperature gas flow in arc-chutes is discharged from gas outlet again after exhaust outlet and multiple gas channels.So that the air-flow between arc-chutes grid is not interfere with each other after flowing out, thermal current interfering in exhaust ports can effectively be prevented, quickly heat is taken out of, so as to quickly extinguish electric arc, the arc quenching effect of arc quenching system and the breaking capacity of breaker are not only can effectively improve, and the volume of arc-chutes can also be reduced.
Description
Technical field
The invention belongs to Low Voltage Electrical Apparatus, and in particular to a kind of miniature circuit breaker.
Background technology
The arc quenching system of miniature circuit breaker generally includes the arc-chutes being made up of arc extinguishing grid pieces and Pao Hu roads and will
Electric arc guides the arc-blowing device of arc-chutes into, particularly conventional use of exchange 50Hz, rated current to 63A,
Rated voltage is no more than 400V miniature circuit breaker, the disjunction of the arc extinguishing ability relation breaker of its arc quenching system
Ability, arc extinguishing ability further relates to several factors.Existing miniature circuit breaker first makes multiple arc extinguishing grid pieces
The arc-chutes of integrative-structure, then arc-chutes are filled in breaker, such a mode be present：First
It is the arc-chutes processing inconvenience of integrative-structure, manufacturing cost is high；Second, the structure of arc-chutes is single, no
The size of tube current specification, all using same arc-chutes, it is impossible to meet the circuit breaker of different model
Different arc extinguishing requirements, so as to influence the performance of circuit breaker, such as small dimension product uses big arc-chutes meeting
Small form factor requirements are influenceed, larger product can influence breaking capacity using small arc-chutes；3rd, in arc-chutes
High temperature gas flow can not discharge freely, this is due to that the structures of arc-chutes causes the exhaust outlet at arc-chutes rear not
It can do big, so as to influence arc quenching effect.
Meanwhile, the design focal point of existing arc extinguishing system of circuit breaker be arc-chutes and its striking above,
The excretion of high temperature gas flow in the preposition structures such as arc blow-out, generally ignorance arc-chutes, but experimental research find that,
The excretion of high temperature gas flow is most important for arc quenching effect, and it is related to the exhaust outlet at arc-chutes rear, housing
On gas outlet, the exhaust outlet of arc-chutes and the gas outlet of housing between the post-modifier such as gas channel.Afterwards
The adverse effect for putting structure is essentially consisted in：The thermal current sprayed after arc-chutes due to electric arc is in exhaust ports shape
Into interfering, therefore cause the exhaust of thermal current obstructed, so as to influence the arc quenching effect of breaker.For
This, people are by the sufficiently bulky arc-chutes of existing miniature circuit breaker adapted, but because arc-chutes are by multiple
Arc extinguishing grid pieces are constituted, and the volume of increase arc-chutes can make complicatedization of arc-chutes, improve processing cost,
The Miniaturization Design trend of miniature circuit breaker is not met.Also, the pressure of thermal current is being vented obstructed feelings
The breaking capacity of optimal arc quenching effect and breaker certainly will can not be then obtained under condition, but also can be aggravated to bag
The impact failure of the arc quenching system including arc-chutes is included, and the impact resistance that strengthen arc quenching system can also be led
Cause the complication of arc extinguishing structure and the increase of manufacturing cost.
The content of the invention
The technical problem to be solved in the present invention is, for the heat of the exhaust outlet of the above-mentioned arc-chutes of prior art
The striking of air-flow and exhaust effect be not good and the defect that can only be made up by increasing the volume of arc-chutes there is provided
A kind of miniature circuit breaker, by using the multiple gas channels being arranged between gas outlet and arc-chutes, so that
The optimal arc quenching effect of acquisition and breaking capacity, while can suitably reduce the volume of arc-chutes.
A kind of miniature circuit breaker, including the housing provided with gas outlet, multiple arc extinguishing grid pieces are arranged on arc-chutes 10
Interior, arc-chutes 10 are fixedly connected with the casing；Exhaust outlet 101 is provided with the back side panel of arc-chutes 10, is being gone out
Rearmounted arc extinguishing structure, described rearmounted arc extinguishing are provided between the exhaust outlet 101 and the venthole of housing of arc chamber 10
Structure includes the multiple gas channels being arranged between the exhaust outlet 101 of arc-chutes 10 and the venthole of housing,
So that the high temperature gas flow in arc-chutes 10 is discharged from gas outlet again after exhaust outlet 101 and multiple gas channels.
It is preferred that, the gas channel of the rearmounted arc extinguishing structure includes current drainage channel 132 and multiple flow-guiding channels
131, each flow-guiding channel 131 and at least one exhaust outlet 101 and at least one insertion of current drainage channel 132,
Current drainage channel 132 and gas outlet insertion.
It is preferred that, the rearmounted arc extinguishing structure includes multiple flow-guiding channels 131, and multiple flow-guiding channels 131 are with going out
Multiple exhaust outlets 101 after arc chamber 10 correspond insertion.
It is preferred that, rearmounted arc extinguishing structure includes multiple flow-guiding channels 131 and multiple current drainage channels 132, and drainage is led to
The number in road 132 is less than the number of flow-guiding channel 131；It is many after multiple flow-guiding channels 131 and arc-chutes 10
Individual exhaust outlet 101 corresponds insertion, each current drainage channel 132 and at least one insertion of flow-guiding channel 131
And with least one gas outlet insertion.
It is preferred that, described multiple flow-guiding channels 131 are separated to form by a plurality of horizontal segmentation muscle 134, a plurality of
Horizontal segmentation muscle 134 be arranged in parallel with arc extinguishing grid pieces and forms palisade radiator structure.
It is preferred that, the gas channel of the rearmounted arc extinguishing structure be arranged on the exhaust outlets 101 of arc-chutes 10 with
Multiple flow-guiding channels 131 that muscle 133 separates are split by arc between the venthole of housing.
It is preferred that, the ratio of the length of the flow-guiding channel 131 of the rearmounted arc extinguishing structure and the length of arc-chutes 10
It is 0.2 to 0.5 to be worth scope.
It is preferred that, it is provided with to be formed between multiple arc extinguishing grid pieces, adjacent arc extinguishing grid pieces in described arc-chutes 10 and goes out
Arc gap, on the back side panel of arc-chutes 10 be provided with multiple exhaust outlets 101, each exhaust outlet respectively with one
Gap in arcing chamber is corresponded, and 101 points of multiple exhaust outlets on the back side panel of arc-chutes 10 are after two row are laid in
The both sides of side plate, two row exhaust outlets 101 alternating staggered floor is laid.
It is preferred that, in housing side provided with four gas outlets, connecing for housing side binding post is proximate to respectively
The first gas outlet 141 at the top of line seat, the second gas outlet 142 close to the junction block bottom and difference position
In the 3rd gas outlet 143 and the 4th gas outlet 144 on the side wall and base of the side bottom of housing one；It is logical in drainage
Split muscle 133 by three arcs between road 132 and four gas outlets to be separated to form with four gas outlets one by one
Corresponding four flow-guiding channels 131, wherein the arc between the 3rd gas outlet 143 of isolation and the 4th gas outlet 144
The end of shape segmentation muscle 133, which leaves ventilation space, to be made to pass through between the 3rd gas outlet 143 and the 4th gas outlet 144
It is logical.
It is preferred that, in addition to the preposition arc-striking structure being arranged in housing, described preposition arc-striking structure includes
It is arranged on multiple striking grooves between arc-chutes front openings and static contact.
Implement the present invention miniature circuit breaker, by front of breaker gas outlet and arc-chutes rear increase
Some gas channels are set so that do not interfere with each other, can effectively be prevented after the air-flow outflow between arc-chutes grid
Thermal current is interfered exhaust ports, quickly takes heat out of, so as to quickly extinguish electric arc, not only
The arc quenching effect of arc quenching system and the breaking capacity of breaker are can effectively improve, and arc-chutes can also be reduced
Volume.
Brief description of the drawings
Below in conjunction with drawings and Examples, the invention will be further described, from retouching for accompanying drawing illustrated embodiment
Advantages and features of the invention can be seen more clearly in stating, wherein：
Fig. 1 is the inside of the miniature circuit breaker of the present invention for the fixed structure for showing arc extinguishing grid pieces 2 and base 1
Integrally-built schematic perspective view.
Fig. 2 is grid fixed structure A, rearmounted arc extinguishing structure B and the preposition striking in the embodiment shown in Fig. 1
The schematic perspective view of structure C.
Fig. 3 is Fig. 1 floor map.
Fig. 4 is Fig. 2 floor map.
Fig. 5 is the schematic perspective view of the arc extinguishing grid pieces 2 in the embodiment shown in Fig. 1.
Fig. 6 is the schematic perspective view of cap 6.
Fig. 7 is Fig. 2 E partial enlarged drawings.
Fig. 8 is Fig. 6 F partial enlarged drawings.
Fig. 9-Figure 10 is another embodiment of the present invention.
Figure 11 is the stereogram of Fig. 9 arc-chutes.
Embodiment
Cap inside miniature circuit breaker with reference to shown in Fig. 1 shown in integrally-built schematic perspective view and Fig. 6
6 schematic perspective view understands that the miniature circuit breaker with polynary putting type arc extinguishing grid pieces of the invention includes base
1 housing constituted with cap 6, base 1 can be using known any one mode (such as screw, card with cap 6
Connect) quiet connection is realized, static contact 3 is provided with the cavity formed between base 1 and cap 6 and dynamic
Contact 4, handle drives the swing of moving contact 4 to be contacting and separating with static contact 3 and realizes circuit by operating mechanism 7
Break-make.
Breaker belongs to by itself different product of current specification of user's request, to the need of arc quenching system
Ask different, a beneficial features of the miniature circuit breaker with polynary putting type arc extinguishing grid pieces of the invention are
Housing is provided with the grid fixed structure A of fixed arc extinguishing grid pieces 2, and described arc extinguishing grid pieces 2 are fixed by grid
Structure A and housing are directly quiet couple, so that formation and going out on housing between each adjacent arc extinguishing grid pieces 2
The gap 2a of gas port insertion.By setting grid fixed structure A to realize, different current specifications place difference
The arc extinguishing grid pieces of piece number, without arc-chutes are made into monoblock type, conveniently process and optimize the structure of product.
Arc extinguishing grid pieces 2 by grid fixed structure A respectively with base 1 and cap 6 are directly quiet couples, and this is quiet
Connection to form multiple gap 2a between each two adjacent arc extinguishing grid pieces 2.Described here is " polynary to put
Put formula " refer to that arc extinguishing grid pieces 2 can be determined according to the different arc extinguishing requirements of the circuit breaker of different model
Quantity, and by respectively with base 1 and cap 6 are directly quiet couples, arc extinguishing grid pieces 2 is directly fixed
On base 1 and cap 6, without using the existing plate wall-like element by constituting arc-chutes will be multiple
The arc quenching chamber structure that arc extinguishing grid pieces are fixedly connected, without being adjusted to housing.Obviously, realization is gone out
The diversification of the quantity of arc grid 2, its key is arc extinguishing grid pieces 2 and the grid for employing polynary putting type
Fixed structure A, its advantage includes：The problem of effectively overcoming arc-chutes excessive or be too small, to meet
While small form factor requirements, it is ensured that excellent arc quenching effect.
In order to further improve the arc quenching effect of the present invention, miniature circuit breaker of the invention also includes being arranged on shell
Internal rearmounted arc extinguishing structure B and preposition arc-striking structure C, described rearmounted arc extinguishing structure B includes being arranged on grid
Multiple gas channels between gap 2a between arc extinguishing grid pieces 2 on piece fixed structure A and described gas outlet
13a, 13b, 13c, so that the high temperature gas flow in the 2a of gap passes through multiple gas channel 13a, 13b, 13c
Discharged again from gas outlet after guiding.Described preposition arc-striking structure C includes being arranged on grid fixed structure A
Arc extinguishing grid pieces 2 and static contact between multiple striking grooves 16.As Figure 1-4, the present embodiment is small-sized
Breaker is additionally provided with instantaneous release including electromagnetic tripping apparatus 8 and including bimetal leaf 9 in housing
Overload release；The striker of electromagnetic tripping apparatus 8 and the lock of operating mechanism are correspondingly arranged, bimetal leaf 9
It is correspondingly arranged with the drive link (not shown) extended on lock.When electric leakage, electromagnetic tripping apparatus 8
Striker ejection hit operating mechanism lock make circuit breaker tripping；When circuit overloads, bimetal leaf bending
Lock is pulled to make circuit breaker tripping by drive link.Fixed arc-chute is provided with the lower section of electromagnetic tripping apparatus 8
The grid fixed structure A of piece 2, grid fixed structure A both sides are respectively equipped with rearmounted arc extinguishing structure B and preposition
Arc-striking structure C；Also set respectively above and below preposition arc-striking structure C sides in grid fixed structure A
There is the run-on tab 5 of the static contact 3 with arc-striking structure and the arc leading angle with V-type；Static contact 3 takes off with electromagnetism
The coil connection of buckle device 8, run-on tab 5 is connected with bimetal leaf 9.By the setting of each arc-striking structure,
Electric arc can be guided into quickly to arc extinguishing grid pieces 2, and it is by rearmounted arc extinguishing structure B and gas outlet that high-temperature gas is fast
Speed discharge, can be effectively improved arc quenching effect and breaking capacity.
Another beneficial features of the miniature circuit breaker of the present invention are that, on grid fixed structure A, it can have a variety of
Mode, a kind of preferred mode is as shown in Figure 2, Figure 4 shows：Described grid fixed structure A includes being arranged on bottom
Multiple lower fixing grooves 15 on seat 1, the multiple upper fixing grooves 65 being arranged on cap 6 are (referring to Fig. 6, figure
8), the lower edge 21 (referring to Fig. 5) of each arc extinguishing grid pieces 2 is embedded in is fixed in each lower fixing groove 15 respectively,
The upper edge 22 (referring to Fig. 5) of each arc extinguishing grid pieces 2 is embedded in is fixed in each upper fixing groove 65 respectively, passes through
Described setting-in fix make each arc extinguishing grid pieces 2 respectively with base 1 and cap 6 are directly quiet couples.Lower fixing groove
15 and the structure of upper fixing groove 65 can have various ways, a kind of preferred mode is as shown in Fig. 2 to Fig. 8：Institute
It is provided with multiple lower fixing muscles 11 (referring to Fig. 7) on the base 1 stated, Fig. 2, the grid fixed knot shown in 4
Interval of the structure A each lower fixing groove 15 between two adjacent lower fixing muscles 11 is formed, lower fixing muscle 11
Height be far smaller than the height H of arc extinguishing grid pieces 2 (referring to Fig. 5)；Referring to Fig. 6, set on described cap 6
Multiple upper fixing muscles 61 are equipped with, grid fixed structure A each upper fixing groove 65 is by adjacent two upper fixing muscles
Interval between 61 is formed, and the height of upper fixing muscle 61 is far smaller than the height H of arc extinguishing grid pieces 2 (referring to figure
5).In order to ensure being embedded in the quiet of fixation between arc extinguishing grid pieces 2 and lower fixing groove 15 and upper fixing groove 65
Being connected under the impact of high temperature gas flow to loosen, while also ensuring that gap 2a has sufficiently large residual altitude
(after the height H for being highly equal to arc extinguishing grid pieces 2 subtracts the height of lower edge 21 and upper edge 22), palpus
Dimensional fits between arc extinguishing grid pieces 2 and lower fixing groove 15 and upper fixing groove 65 are optimized, can be had many
Concrete mode is planted, one kind is preferably：The width of described grid fixed structure A lower fixing groove 15
D1 (referring to Fig. 7) is equal to the thickness d (referring to Fig. 5) of arc extinguishing grid pieces 2, and the length of lower fixing groove 15 is equal to
The length b (referring to Fig. 5) of arc extinguishing grid pieces 2, the depth h1 (referring to Fig. 7) of lower fixing groove 15 is much small
In the height H of arc extinguishing grid pieces 2.Described grid fixed structure A upper fixing groove 65 width D 6 (referring to
Fig. 8) it is equal to the thickness d of arc extinguishing grid pieces 2, the length of upper fixing groove 65 is equal to the length b of arc extinguishing grid pieces 2, under
The depth h6 (referring to Fig. 8) of fixing groove 65 is far smaller than the height H of arc extinguishing grid pieces 2.From Fig. 2 and Fig. 7
The embodiment provided is visible, and the height of lower fixing muscle 11 is equal to the depth h1 of lower fixing groove 15 (referring to Fig. 7).
The embodiment provided from Fig. 6 and Fig. 8, the height of upper fixing muscle 61 is equal to the depth of upper fixing groove 65
H6 (referring to Fig. 8)；However, in actual adoptable grid fixed structure A, they are not it is possible that
Essentially equal situation, but as long as being far smaller than described in meeting, then can ensure that described quiet connection will not
Gap 2a is set to obtain big residual altitude as far as possible on the premise of loosening, because residual altitude is bigger, then arc extinguishing
The arc quenching effect of grid 2 is better, while the high temperature gas flow in the 2a of gap flows and must got over to rearmounted arc extinguishing structure B
Freely.Described is far smaller than, for example, descend the depth h6 of fixing groove 65 to be smaller than the height H of arc extinguishing grid pieces 2
1/6th, the depth h6 of upper fixing groove 15 be smaller than arc extinguishing grid pieces 2 height H 1/6th,
The height of upper fixing muscle 61 is smaller than 1/6th of the height H of the arc extinguishing grid pieces 2, height of lower fixing muscle 11
Degree is smaller than 1/6th of the height H of arc extinguishing grid pieces 2.
The present invention another beneficial features be, the described small-sized open circuit with polynary putting type arc extinguishing grid pieces
Device also includes the rearmounted arc extinguishing structure B being arranged in housing, and described rearmounted arc extinguishing structure B includes being arranged on grid
Multiple gas channels between gap 2a between arc extinguishing grid pieces 2 on piece fixed structure A and described gas outlet
13a, 13b, 13c, so that the high temperature gas flow in the 2a of gap passes through multiple gas channel 13a, 13b, 13c
Discharged again from gas outlet after guiding.Rearmounted arc extinguishing structure B concrete structure can have various ways, a kind of preferred
Mode as shown in Figure 2, Figure 4 shows：A plurality of lower segmentation muscle 12, described shell are provided with described base 1
A plurality of upper segmentation muscle 62 (referring to Fig. 6) is provided with lid 6, lower segmentation muscle 12 is docked with upper segmentation muscle 62,
Space between base 1 and cap 6 is separated into rearmounted arc extinguishing structure B multiple gas channel 13a, 13b
And 13c, each gas channel 13a, 13b or 13c respectively with the gap 2a of at least one arc extinguishing grid pieces 2 and
At least one gas outlet insertion.Above-mentioned rearmounted arc extinguishing structure B beneficial effect is：First, it is multiple to go out
Electric arc is cut into segmental arc by arc grid 2 and the gap 2a between them, and each segmental arc is fast in each gap 2a
Speed is extinguished, and forms high-temperature high-pressure air flow in the 2a of gap, because each gap 2a of arc extinguishing grid pieces 2 is with after
Multiple gas channel 13a, 13b and the 13c for putting arc extinguishing structure B are led directly to, and gas channel can improve larger
Negative pressure space, therefore can by the high-temperature high-pressure air flow in the 2a of gap in time, be rapidly directed to each air-flow and lead to
In road 13a, 13b and 13c, the arc extinguishing ability of arc extinguishing grid pieces 2 can be effectively improved.Second, due to from gap
The high temperature gas flow of 2a outflows flow to multiple and of gas outlet 14 from multiple gas channel 13a, 13b and 13c respectively
It is discharged to after 64 outside the base 1 of breaker, so high temperature gas flow will not be formed during discharge is flowed
Interfere, no matter high temperature gas flow air pressure it is much, can it is smooth, rapidly from gas outlet discharge.3rd,
Because multiple gas channel 13a, 13b and 13c employ a plurality of lower segmentation muscle 12 and a plurality of upper segmentation muscle 62
Docking is separated to form, and splitting muscle also has effects that radiating, therefore increase segmentation muscle also can effectively accelerate height
The cooling of warm air.4th, due to rearmounted arc extinguishing structure B have it is smooth, be quickly vented feature, so
The impact of air-flow can also effectively be alleviated, make the structure including arc extinguishing grid pieces 2 from impact failure.So as to,
The present invention can effectively overcome the following defect of existing arc quenching chamber structure：Because the exhaust outlet at arc-chutes rear is narrow
Narrow, the high-temperature high-pressure air flow in arc-chutes is difficult to discharge from exhaust outlet, and in exhaust outlet also in influence excretion
Interfere, cause the high-temperature high-pressure air flow for remaining in arc-chutes for being difficult excretion to there is arc quenching effect serious
Threaten, such as cause electric arc to be restriked repeatedly.
It is a kind of preferred in order to be able to further improve the rearmounted arc extinguishing structure B effect for draining high-temperature high-pressure air flow
Organization plan as shown in Figure 3 and Figure 4, in the housing provided with multiple gas outlets and multiple gas channel 13a,
13b、13c；The gap 2a of each gas channel 13a, 13b, 13c respectively with least one arc extinguishing grid pieces 2
With at least one gas outlet insertion.Specifically, being proximate to shell respectively provided with four gas outlets in housing side
The first gas outlet 141 at the top of the junction block of body side binding post, the second outlet close to the junction block bottom
Mouth 142 and the 3rd gas outlet 143 and the 4th being located at respectively on the side wall and base of the side bottom of housing one go out
Gas port 144；First separates muscle 121 by the first gas outlet 141 and the second gas outlet 142 and the 3rd gas outlet
143 and the 4th gas outlet 144 be isolated entirely from, form overdraught passage 13c and downstream passage, first goes out
The gas outlet 142 of gas port 141 and second and more than the gap 2a insertions between the arc extinguishing grid pieces 2 of half；Second point
Muscle 122 isolates the 3rd gas outlet 143 and the part of the 4th gas outlet 144 to guide high temperature gas flow, by under
Gas channel separates to form the first downstream passage 13a and the second downstream passage 13b, and second separates muscle
Gap 2a connections between 122 one end and arc extinguishing grid pieces 2, the other end is to the 3rd gas outlet 143 and the 4th outlet
Extending between mouth 144, and leave ventilation space makes insertion between the 3rd gas outlet 143 and the 4th gas outlet 144.
Obvious this structure can make high-temperature high-pressure air flow pass through the first downstream passage 13a, the second downstream passage 13b
Excluded with overdraught passage 13c from four gas outlets, improve the smooth, quick of excretion with further and prevent
The effect of interference.
Another beneficial features of the present invention are, in addition to the preposition arc-striking structure C being arranged in housing, such as scheme
Shown in 3, described preposition arc-striking structure C include the arc extinguishing grid pieces 2 that are arranged on grid fixed structure A with it is quiet
The striking groove 16 of multiple arcs between contact.Between the striking groove 16 and multiple arc extinguishing grid pieces 2 of multiple arcs
Gap 2a is corresponded.Specifically, base 1 is provided with multiple upper striking muscle, cap 6 is correspondingly provided with multiple
Static contact 3 is formed between upper striking muscle and lower striking muscle after the relative connection of lower striking muscle, base 1 and cap 6
The space contacted with moving contact 4；Static contact 3 is arranged between striking muscle and lower striking muscle, moving contact 4
Swing and contacted with static contact 3 to the direction close to arc extinguishing grid pieces 2 between upper striking muscle and lower striking muscle.It is logical
The striking groove 16 of multiple arcs is crossed, the electric arc that dynamic/static contact is produced quickly guides multiple arc extinguishing grid pieces 2 into respectively
Between gap 2a, improve the gas channel of electric arc, improve breaker arc extinguishing ability and assembling can be saved and lead
The elements such as magnetic sheet.
Another beneficial features of the present invention are the settings of static contact 3 and run-on tab 5 with arc-striking structure：
The coil two ends of electromagnetic tripping apparatus 8 are directly connected to terminal plate and static contact 3 respectively, without setting support,
Static contact 3 includes the contact part 31 provided with stationary contact, striking portion 32 and the yoke portion 33 being sequentially connected, institute
Axial direction and with arc extinguishing grid pieces 2 parallel, contact of the yoke portion 33 stated parallel to the coil of electromagnetic tripping apparatus 8
The arc leading angle of V-type is formed between portion 31 and striking portion 32；Contact part 31 and striking portion 32 are located at base 1
Upper striking muscle and cap 6 lower striking muscle between.The run-on tab 5 include be sequentially connected flat segments 51,
V-type striking section 52 and be connected with bimetal leaf 9 spacing section 53；Flat segments 51 are parallel with arc extinguishing grid pieces 2,
Rib is fixed provided with the V-type for installing run-on tab 5 in housing, it is corresponding that V-type striking section 52 fixes rib with V-type
Clamp, run-on tab 5 is connected by spacing section 53 with bimetal leaf 9, and spacing section of rib correspondence is fixed in V-type
53 side is provided with support protrusion 54, makes the flexible support of run-on tab 5, it is ensured that bimetal leaf 9 is in mistake
Original position can be accurately returned to after carrying bending.
The present invention also has a beneficial features to be grid fixed structure A on base 1 and cap 6 and thereon
With rearmounted arc extinguishing structure B design, it can have a various ways, a kind of preferred mode referring to Fig. 1-Fig. 4,
Shown in Fig. 6：Described base 1 includes multiple lower fixing muscles 11, multiple lower segmentation muscle 12, multiple lower outlets
Mouthfuls 14, multiple lower striking muscle and multiple lower fixing grooves 15, described cap 6 include multiple upper fixing muscles 61,
Multiple upper segmentation muscle 62, multiple upper gas outlets 64, multiple upper striking muscle and multiple upper fixing grooves 65；Described
Base 1 and cap 6 it is quiet couple should cause each lower fixing muscle 11 respectively with each upper fixing muscle 61 one by one it is opposite,
It is each it is lower segmentation muscle 12 respectively with it is each it is upper segmentation muscle 62 dock one by one, each lower gas outlet 14 respectively with upper gas outlet
64 dock one by one, each lower striking muscle is opposite one by one with each upper striking muscle respectively, the bottom surface 15d of lower fixing groove 15
The distance between bottom surface 65d (referring to Fig. 8) of (referring to Fig. 7) and upper fixing groove 65 is equal to arc extinguishing grid pieces 2
Height H.Obviously, the such structure of the present invention causes the quantity of the arc extinguishing grid pieces 2 in assemble compact breaker
It may be selected to determine, without changing the structure on base 1, cap 6 and arc extinguishing grid pieces 2, to meet polynary placement
Requirement.Each lower segmentation muscle 12 is docked one by one with each upper segmentation muscle 62 respectively, is exactly each lower segmentation muscle
12 distinguish in that corresponding split muscle 62 docks, that is, each on segmentation muscle 62 respectively with its
That corresponding lower segmentation muscle 12 is docked." docking " described here is exactly mutual abutting, by the abutting,
So that base 1 with cap 6 is quiet couple after, by it is lower segmentation muscle 12 with it is upper split muscle 62 dock common realization
Between each gas channel being separated to form will not convection current high temperature gas flow, to avoid the gas between two gas channels
Drain off and disturb.Moreover, the gas outlet of the present invention can include combination gas outlet and/or independent gas outlet；Such as Fig. 1,
Shown in Fig. 6, the described lower gas outlet 14 and upper gas outlet 64 of combining gas outlet is respectively half mouthful, two
Half mouthful of docking is combined into complete gas outlet.Described independent gas outlet (not shown) is respectively to set
Complete lower gas outlet on base 1, and/or the complete upper gas outlet being arranged on cap 6.No matter
Combination gas outlet or independent gas outlet, each gas outlet with the insertion of gas channel 13, the position of gas outlet
It can be designed according to the license of practical structures.
The rearmounted arc extinguishing structure B and preposition arc-striking structure C of certain miniature circuit breaker of the present invention are applicable not only to band
There is the miniature circuit breaker of polynary putting type arc extinguishing grid pieces, be also applied for the miniature circuit breaker using arc quenching chamber structure.
Such as Fig. 9-11 embodiment two, grid fixed structure A, multiple arc-chutes are not provided with the housing of breaker
Piece is arranged in arc-chutes 10, and arc-chutes 10 are fixedly connected with the housing of breaker；After arc-chutes 10
Side plate is provided with exhaust outlet 101, after being provided between the exhaust outlet 101 and the venthole of housing of arc-chutes 10
Putting arc extinguishing structure B, described rearmounted arc extinguishing structure B includes the exhaust outlet 101 and shell for being arranged on arc-chutes 10
Multiple gas channels between the venthole of body, so that the high temperature gas flow in arc-chutes 10 passes through exhaust outlet 101
With after multiple gas channels again from gas outlet discharge.Other structures in the breaker of the present embodiment, including it is preceding
Put arc-striking structure C, static contact, moving contact, run-on tab etc. identical with embodiment one, as mentioned preposition striking
Structure includes the multiple striking grooves being arranged between arc-chutes front openings and static contact, is not repeating again.
By in front of breaker gas outlet and the increase of arc-chutes rear sets some gas channels so that arc-chutes
It is not interfere with each other after air-flow outflow between grid, can effectively prevents thermal current mutually dry at exhaust outlet 101
Disturb, quickly take heat out of, so as to quickly extinguish electric arc, not only can effectively improve the arc extinguishing of arc quenching system
The breaking capacity of effect and breaker, and the volume of arc-chutes can also be reduced.
As shown in figure 11, it is provided with described arc-chutes 10 between multiple arc extinguishing grid pieces, adjacent arc extinguishing grid pieces
Gap in arcing chamber is formed, multiple exhaust outlets 101 are provided with the back side panel of arc-chutes 10.It is preferred that, Mei Gepai
Gas port is corresponded with a gap in arcing chamber respectively, 101 points of multiple exhaust outlets on the back side panel of arc-chutes 10
The both sides of back side panel are laid in for two row, two row exhaust outlets 101 alternating staggered floor is laid, it is to avoid thermal current is in row
Interfering at gas port 101.
As shown in figs. 9-10, multiple gas outlets, each gas outlet and at least one are provided with the housing of breaker
Individual gas channel insertion, the exhaust outlet insertion of each gas channel and arc-chutes 10.Specifically, this implementation
The rearmounted arc extinguishing structure B of example gas channel includes flow-guiding channel 131 and current drainage channel 132, and each water conservancy diversion leads to
Road 131 and at least one exhaust outlet 101 and at least one insertion of current drainage channel 132, current drainage channel 132 and
Gas outlet insertion.It is preferred that, rearmounted arc extinguishing structure B includes multiple flow-guiding channels 131 and multiple current drainage channels
132, the number of current drainage channel 132 is less than the number of flow-guiding channel 131；Multiple flow-guiding channels 131 and arc extinguishing
Multiple exhaust outlets 101 behind room 10 correspond insertion, it is to avoid thermal current is mutually dry at exhaust outlet 101
Disturb；Each current drainage channel 132 with least one insertion of flow-guiding channel 131 and with least one gas outlet insertion.
Described flow-guiding channel 131 be arranged in parallel with arc extinguishing grid pieces and forms palisade radiator structure, current drainage channel 132
Camber is set.Described multiple flow-guiding channels 131 are separated to form by a plurality of horizontal segmentation muscle 134, a plurality of
Horizontal segmentation muscle 134 be arranged in parallel with arc extinguishing grid pieces and forms palisade radiator structure.Pass through flow-guiding channel 131
Setting, be that the hot gas of expansion out flows to gas outlet direction respectively out of arc-chutes 10, then by leading
Circulation road 131 collects to be excluded to gas outlet direction water conservancy diversion, can effectively prevent thermal current at exhaust outlet 101
Interfere, quickly take heat out of, so as to quickly extinguish electric arc, and effectively reduce arc-chutes 10
Volume.Certainly, this is the preferred scheme of the present invention, is also not excluded for only setting flow-guiding channel 131 or drainage logical
The situation in road 132.The situation such as embodiment one of flow-guiding channel 131, i.e., described rearmounted arc extinguishing structure B are only set
Gas channel be arranged between the exhaust outlet 101 of arc-chutes 10 and the venthole of housing by arc point
Cut multiple flow-guiding channels 131 of the separation of muscle 133.The situation of current drainage channel 132, i.e. current drainage channel are only set
Do not split muscle by arc between 132 and gas outlet to separate, i.e., only 1 big flow-guiding channel 131.
In order to be able to further improve rearmounted arc extinguishing structure B arc extinguishing, cooling and the effect for draining high-temperature high-pressure air flow
The length a of the flow-guiding channel 131 of rearmounted arc extinguishing structure B described in the fruit and length b of arc-chutes 10 ratio
Scope is 0.2 to 0.5.Due to the dimension limitation of the housing by breaker, the length a of flow-guiding channel 131 and
The length b of arc-chutes 10 has complementary relationship, therefore the length a lengthenings of flow-guiding channel 131 need to be by shortening
The length b of arc-chutes 10 is obtained, special because flow-guiding channel 131 also has the effect of cooling down high-temperature air-flow
It is not due to the structure for employing multiple flow-guiding channels 131 that a plurality of horizontal segmentation muscle 134 is separated to form, makes
Obtain each horizontal segmentation muscle 134 and form palisade radiator structure, and the radiator structure can pass through optimization design
Cooling condition (such as area of dissipation, thermal capacity) more more preferable than arc extinguishing grid pieces is obtained, therefore cooling effect is especially good,
Even if the length b of arc-chutes 10 is shortened, but cooling effect is possible to more preferable, therefore, optimization of the invention
The key factor of design includes the length a of flow-guiding channel 131 and the length b of arc-chutes 10 ratio.
In embodiment as shown in figs. 9-10, rearmounted arc extinguishing structure B includes multiple flow-guiding channels 131 and many
Individual current drainage channel 132, the number of current drainage channel 132 is less than the number of flow-guiding channel 131；Multiple flow-guiding channels
131 correspond insertion with multiple exhaust outlets 101 after arc-chutes 10；In housing side provided with four outlets
Mouthful, the first gas outlet 141 at the top of the junction block of housing side binding post is proximate to respectively, close to the wiring
Second gas outlet 142 of seat bottom and respectively the 3rd going out on the side wall and base of the side bottom of housing one
The gas outlet 144 of gas port 143 and the 4th.Pass through three arcs point between current drainage channel 132 and four gas outlets
Cut muscle 133 be separated to form with one-to-one four flow-guiding channels 131 in four gas outlets, wherein isolation the 3rd goes out
The end of arc segmentation muscle 133 between the gas outlet 144 of gas port 143 and the 4th, which leaves ventilation space, makes the 3rd
Insertion between the gas outlet 144 of gas outlet 143 and the 4th.
Above content is to combine specific preferred embodiment further description made for the present invention, no
It can assert that the specific implementation of the present invention is confined to these explanations.For the common of the technical field of the invention
For technical staff, without departing from the inventive concept of the premise, some simple deductions can also be made or replaced
Change, should all be considered as belonging to protection scope of the present invention.
Claims (10)
1. a kind of miniature circuit breaker, including the housing provided with gas outlet, it is characterised in that：Multiple arc extinguishing grid pieces
In arc-chutes (10), arc-chutes (10) are fixedly connected with the casing；After arc-chutes (10)
Side plate is provided with exhaust outlet (101), arc-chutes (10) exhaust outlet (101) and housing venthole it
Between be provided with rearmounted arc extinguishing structure, described rearmounted arc extinguishing structure includes the exhaust outlet for being arranged on arc-chutes (10)
(101) multiple gas channels between the venthole of housing, so that the high temperature gas flow in arc-chutes (10)
Discharged again from gas outlet after exhaust outlet (101) and multiple gas channels.
2. miniature circuit breaker according to claim 1, it is characterised in that：The rearmounted arc extinguishing structure
Gas channel includes current drainage channel (132) and multiple flow-guiding channels (131), each flow-guiding channel (131)
With at least one exhaust outlet (101) and at least one current drainage channel (132) insertion, current drainage channel (132)
With gas outlet insertion.
3. miniature circuit breaker according to claim 2, it is characterised in that：The rearmounted arc extinguishing structure bag
Include multiple flow-guiding channels (131), multiple flow-guiding channels (131) and multiple exhaust outlets after arc-chutes (10)
(101) insertion is corresponded.
4. miniature circuit breaker according to claim 2, it is characterised in that：Rearmounted arc extinguishing structure includes many
Individual flow-guiding channel (131) and multiple current drainage channels (132), the number of current drainage channel (132) are less than water conservancy diversion
The number of passage (131)；Multiple flow-guiding channels (131) and multiple exhaust outlets (101) after arc-chutes (10)
Correspond insertion, each current drainage channel (132) and at least one flow-guiding channel (131) insertion and with extremely
A few gas outlet insertion.
5. miniature circuit breaker according to claim 2, it is characterised in that：Described multiple flow-guiding channels
(131) it is separated to form by a plurality of horizontal segmentation muscle (134), a plurality of horizontal segmentation muscle (134) and arc-chute
Piece, which be arranged in parallel, forms palisade radiator structure.
6. miniature circuit breaker according to claim 1, it is characterised in that：The rearmounted arc extinguishing structure
Gas channel be arranged on the exhaust outlets (101) of arc-chutes (10) between the venthole of housing by arc
Multiple flow-guiding channels (131) that shape segmentation muscle (133) separates.
7. according to any described miniature circuit breakers of claim 2-5, it is characterised in that：The rearmounted arc extinguishing
The ratio range of the length of the flow-guiding channel (131) of structure and the length of arc-chutes (10) is 0.2 to 0.5.
8. miniature circuit breaker according to claim 1, it is characterised in that：Described arc-chutes (10)
Interior be provided between multiple arc extinguishing grid pieces, adjacent arc extinguishing grid pieces forms gap in arcing chamber, after arc-chutes (10)
Side plate is provided with multiple exhaust outlets (101), and each exhaust outlet is corresponded with a gap in arcing chamber, gone out respectively
Multiple exhaust outlets (101) on the back side panel of arc chamber (10) are divided into the both sides that two row are laid in back side panel, two
Row exhaust outlet (101) alternately lay by staggered floor.
9. miniature circuit breaker according to claim 4, it is characterised in that：Four are provided with housing side
Gas outlet, is proximate to the first gas outlet (141) at the top of the junction block of housing side binding post, leans on respectively
The second gas outlet (142) of the nearly junction block bottom and respectively the side wall positioned at the side bottom of housing one and bottom
The 3rd gas outlet (143) and the 4th gas outlet (144) on side；Go out in current drainage channel (132) with four
By three arcs split muscle (133) between gas port and be separated to form with four gas outlets one-to-one four and lead
Circulation road (131), wherein the arc between the 3rd gas outlet (143) of isolation and the 4th gas outlet (144)
The end of segmentation muscle (133), which leaves ventilation space, makes the 3rd gas outlet (143) and the 4th gas outlet (144)
Between insertion.
10. miniature circuit breaker according to claim 1, it is characterised in that：Also include being arranged on housing
Interior preposition arc-striking structure, described preposition arc-striking structure includes being arranged on arc-chutes front openings and static contact
Between multiple striking grooves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610192404.4A CN107293458B (en) | 2016-03-30 | 2016-03-30 | Small-sized circuit breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610192404.4A CN107293458B (en) | 2016-03-30 | 2016-03-30 | Small-sized circuit breaker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107293458A true CN107293458A (en) | 2017-10-24 |
| CN107293458B CN107293458B (en) | 2020-08-25 |
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ID=60088121
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610192404.4A Active CN107293458B (en) | 2016-03-30 | 2016-03-30 | Small-sized circuit breaker |
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| Country | Link |
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| CN (1) | CN107293458B (en) |
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| CN108321058A (en) * | 2018-02-28 | 2018-07-24 | 首瑞（天津）电气设备有限公司 | A kind of electromagnetic trip breaker |
| CN114664596A (en) * | 2020-12-23 | 2022-06-24 | 上海良信电器股份有限公司 | Bar switch |
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| CN205621690U (en) * | 2016-03-30 | 2016-10-05 | 浙江正泰电器股份有限公司 | Miniature circuit breaker |
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| CN1498411A (en) * | 2001-03-20 | 2004-05-19 | 莫勒自动系统公司 | Housing for switching device |
| EP2416334A1 (en) * | 2004-10-26 | 2012-02-08 | Eaton Industries (Netherlands) B.V. | Arcing chamber for safety switch |
| CN103021756A (en) * | 2012-12-27 | 2013-04-03 | 德力西电气有限公司 | Circuit breaker capable of preventing electric arc from being ejected reversely and provided with arc way |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114664596A (en) * | 2020-12-23 | 2022-06-24 | 上海良信电器股份有限公司 | Bar switch |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107293458B (en) | 2020-08-25 |
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