A kind of surge protector
Technical field
The present invention relates to electronic electric equipment technical field, more particularly to a kind of surge protector.
Background technology
Surge protector is a kind of electronics that security protection is provided for various electronic equipments, instrument and meter, communication line
Device.
Surge protector runs into the lightning current or appearance more than over-pressure safety device tenability limit in use
System overvoltage cause the static conducting of over-pressure safety device make system overcurrent by when, the metal belonging to its internal trip gear
The solder of eutectic welding contact between shell fragment and overvoltage protection pin reaches the state being softened or melted, tripping mechanism
Part said metal shell fragment separates with overvoltage protection element pin and expands spacing distance, and the affiliated slide plate in tripping mechanism part is same
Shi Xiangqian, which promotes to separate both, carries out electrical isolation and arc extinguishing, reaches the work(by the surge protector of failure and isolation of system
Can, improve equipment safety in utilization.
However, when usually appearing in lightning current and flowing through, overvoltage protection and not up to it bears the limit or remaining
When amount is also very big, trip gear is because excessive lightning current electric discharge stress just advancement so that surge protector
Life-span or hydraulic performance decline, cause unnecessary loss;The system overvoltage often occurred simultaneously causes over-pressure safety device quiet
State turns on so that substantial amounts of system overcurrent flows through from over-pressure safety device so that over-pressure safety device goes out in a short time
Existing punch-through, if trip gear at this time because welding stage thermal capacity is excessive, causes the heating of over-pressure safety device needs longer
Time the low temperature weld point temperature lifting temperature that can soften or melt to low temperature scolding tin on welding stage could just be allowed dropout
Device action, before trip gear action, the system power flowed through after over-pressure safety device breakdown is by trip gear
Insulated part punctures, and causing trip gear to fail, causing surge protector catching fire occur because can not be efficiently separated with system
Phenomenon.
Therefore, how to reduce and put in the case where over-pressure safety device is intact because releasing mechanism can not bear normal thunder and lightning
Electric stress cause tripping mechanism action and how to reduce occur over-pressure safety device failure need trip gear fast and effectively
During action, but because trip gear because low temperature solder joint heated up the problem of slow cause trip gear can not quick acting so that electricity
Surge protector catching fire problem, it is those skilled in the art's technical problem urgently to be resolved hurrily.
The content of the invention
It is an object of the invention to provide a kind of surge protector, can reduce tripping mechanism in the intact feelings of over-pressure safety device
Under condition, because of the probability that electric discharge stress factors are threaded off when being impacted by lightning current, and the feelings of over-pressure safety device failure can be reduced
Under condition, probability that trip gear can not act in time.
To achieve these goals, the invention provides following scheme:
A kind of surge protector, including tripping mechanism, wherein, tripping mechanism includes box body, release sheet, over-pressure safety device
And welding stage, one end of the release sheet are arranged on the box body, the other end of the release sheet is welded on the welding stage, institute
Over-pressure safety device is stated on the box body, and through hole is provided with the first electrode on the over-pressure safety device top, institute
State welding stage installation on the first electrode, and cover the through hole, be also provided with the tripping mechanism and be arranged on the disengaging
First isolation channel of piece lower end, first isolation channel are formed for the first side of the welding stage and the first side opening wall of the through hole
Hole slot.
Preferably, in above-mentioned surge protector, the second isolation channel, second isolation are also provided with the tripping mechanism
The hole slot that groove is formed for the second side of the welding stage with the second side opening wall of the through hole.
Preferably, in above-mentioned surge protector, the welding stage is brazing platform, nickel plating welding stage or tin plating welding stage.
Preferably, in above-mentioned surge protector, the welding stage and the integrated connection of first electrode.
Preferably, in above-mentioned surge protector, the over-pressure safety device also includes the second electricity for being arranged on its bottom
Pole.
Preferably, in above-mentioned surge protector, first electrode and second electrode welding on the over-pressure safety device
It is fixedly secured on the over-pressure safety device or by screw on the over-pressure safety device.
Preferably, in above-mentioned surge protector, the release sheet is sprung copper release sheet;
The box body is aerogenesis insulation box body.
Preferably, in above-mentioned surge protector, in addition to slide plate is departed from, the disengaging slide plate is arranged on the box body
On, and the disengaging skid plates support is in the bottom of the release sheet.
Preferably, in above-mentioned surge protector, the over-pressure safety device is voltage limiting type element or voltage switch
Type element or the series connection for voltage limiting type element and voltage switch type element.
Preferably, in above-mentioned surge protector, in addition to the arc-chute being arranged on box body;
The arc-chute is arc arc-chute, is provided with multiple arc spraying mouths on the housing, and the arc spraying mouth is towards described
The outlet of the export electric arc of arc-chute.
It can be seen from the above technical scheme that surge protector provided by the invention, due to dockingundocking piece and overvoltage
The first isolation channel is provided between the welding stage and over-pressure safety device of protection device, therefore, passes through overvoltage protection in high current
When the first electrode of device, welding stage and release sheet, due to the presence of the first isolation channel, when high current flows through so that electric current is only
Release sheet can be flowed to by welding stage and first electrode junction, first electrode part parallel with it below release sheet is not had
Be parallel to each other with release sheet upstream overcurrent but high current in opposite direction flow through, thus can effectively reduce flowed through in lightning current it is de-
During buckle mechanism, because causing between the two in the presence of two high currents parallel to each other but in opposite direction between release sheet and first electrode
It is larger caused by the presence of being flowed through because of lightning current to will be disengaged from electric stress or the magnetic field that piece pulls open with first electrode in welding stage junction
Power, and fluting can reduce the thermal capacity of welding stage at welding stage so that failed adstante febre in overvoltage protection, release sheet with
Welding stage junction reaches the temperature for acting tripping mechanism within the shorter time so that release sheet is as fast as possible to be divided with welding stage
From.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is the required accompanying drawing used in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
Some embodiments of invention, for those of ordinary skill in the art, on the premise of not paying creative work, can be with
Other accompanying drawings are obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the tripping mechanism for the surge protector that the embodiment of the present invention one provides;
Fig. 2 is the broken section structural representation of the tripping mechanism for the surge protector that the embodiment of the present invention one provides;
Fig. 3 is the cross section structure diagram of the tripping mechanism for the surge protector that the embodiment of the present invention one provides;
Fig. 4 is another structural representation of the tripping mechanism for the surge protector that the embodiment of the present invention two provides;
Fig. 5 is the cross section structure diagram of the tripping mechanism for the surge protector that the embodiment of the present invention two provides;
Fig. 6 is the structural representation of surge protector provided by the invention.
Wherein, in Fig. 1-6:
Release sheet 1, over-pressure safety device 2, welding stage 3, first electrode 201, through hole 202, the first isolation channel 4, the first side
301st, the first side opening wall 20201, the second isolation channel 5, the second side 302, the second side opening wall 20202, second electrode 203, disengaging are slided
Plate 6, arc-chute 7, arc spraying mouth 8, box body 9, housing 10.
Embodiment
In order that those skilled in the art is better understood from technical scheme, it is below in conjunction with the accompanying drawings and specific real
Applying mode, the present invention is described in further detail.
Embodiment one
Fig. 1-3 are referred to, the invention discloses a kind of surge protector, including tripping mechanism, wherein, tripping mechanism includes
Box body 9, release sheet 1, over-pressure safety device 2 and welding stage 3, one end of release sheet 1 are arranged on box body 9, are specifically as follows welding
On box body 9, the other end is welded on welding stage 3, and over-pressure safety device 2 is arranged on box body 9, and the top of over-pressure safety device 2
First electrode 201 on be provided with through hole 202, welding stage 3 is arranged in first electrode 201, and covers through hole 202, on tripping mechanism
The first isolation channel 4 is also provided with, the first isolation channel 4 is opened in the lower end of release sheet 1, and lower end herein is referred to such as the lower section in Fig. 3.The
First side 301 and the hole slot of first side opening wall 20201 composition of through hole 202 of one isolation channel 4 for welding stage 3.That is cover the part of welding stage 3
Lid through hole 202, the first isolation channel 4 is formed between the side of welding stage 3 and the side hole wall of through hole 202.
Surge protector provided by the invention, the top of over-pressure safety device 2 and bottom are electrically connected the He of first electrode 201
Second electrode 203.First electrode 201 is connected with release sheet 1 by welding stage 3, is opened on the side of welding stage 3 and first electrode 201
The first isolation channel 4 is formed between through hole 202.
Surge protector provided by the invention, due to dockingundocking piece 1 and the welding stage 3 and overvoltage protection of over-pressure safety device
The first isolation channel 4 is provided between device 2, therefore, in first electrode 201 of the high current by overvoltage protection, welding stage 3
During with release sheet 1, due to the presence of the first isolation channel 4, when high current flows through so that electric current can only pass through welding stage 3 and first
The junction of electrode 201 flows to release sheet 1, and the part of first electrode 201 for making the lower section of release sheet 1 parallel with it does not have and release sheet
1 upper overcurrent is parallel to each other but high current in opposite direction flows through, therefore can effectively reduce and flow through tripping mechanism in lightning current
When, because to deposit between the two in the presence of two high currents parallel to each other but in opposite direction between release sheet 1 and first electrode 201
The larger electric stress or magnetic that will be disengaged from piece 1 and pulled open with first electrode 201 in welding stage junction caused by being flowed through because of lightning current
Field force, and fluting can reduce the thermal capacity of welding stage at welding stage 3 so that in overvoltage protection failure adstante febre, depart from
Piece 1 reaches the temperature for acting tripping mechanism with the junction of welding stage 3 within the shorter time so that release sheet 1 is as fast as possible
Separated with welding stage 3.
In summary, surge protector disclosed by the invention, high current by when, the first isolation channel 4 has blocked welding stage
The high current of side, tripping mechanism can be reduced under over-pressure safety device fine status, be taken off by the electric discharge stress impact of thunder and lightning
The probability of button, and in the case of over-pressure safety device failure can be reduced, probability that trip gear can not act in time.
Embodiment two
As illustrated in figures 4-5, in the present invention provides another embodiment, surge protector and embodiment one in the present embodiment
In surge protector structure it is similar, something in common is just repeated no more, only introduces difference.
In the present embodiment, specifically disclose and the second isolation channel 5 is also provided with tripping mechanism, the second isolation channel 5 is welding stage 3
The hole slot that second side opening wall 20202 of the second side 302 and through hole 202 is formed.That is the hole of the both sides of welding stage 3 and the both sides of through hole 202
Isolation channel is provided between wall, on the one hand, the second isolation channel 5 has blocked the high current of the side of welding stage 3, reduces tripping mechanism
Breakdown probability, on the other hand, reduce the area of welding stage 3 so that welding stage 3 can be melted or fused faster so that de-
Separated as early as possible from piece 1 and first electrode 201.
It is brazing platform, nickel plating welding stage or tin plating welding stage the invention discloses welding stage 3.It is molten in order to further improve welding stage 3
Disconnected speed, preferably welding stage 3 are tin plating welding stage.
The invention also discloses welding stage 3 and the integrated connection of first electrode.Welding stage 3 is removed and installed for the ease of changing,
Welding stage 3 detachably can also be connected with first electrode 201.
Due to sprung copper good conductivity, elasticity is high, and preferably release sheet 1 is sprung copper release sheet 1.It is it should be noted that de-
From the release sheet 1 that piece 1 can also be other materials, as long as meeting that release sheet 1 that can be conductive belongs to the model that the present invention protects
Enclose.
Also include the second electrode 203 for being arranged on its bottom, overvoltage protection dress the invention also discloses over-pressure safety device 2
Put the first electrode 201 on 2 and second electrode 203 is welded on over-pressure safety device 2 or was fixedly secured to by screw
Press in protection device 2.
It is aerogenesis insulation box body 9 the invention discloses box body 9 to preferably play a part of arc extinguishing.
Further, also include departing from slide plate 6 the invention discloses tripping mechanism, depart from slide plate 6 and be arranged on box body 9,
And depart from the bottom that slide plate 6 is supported on release sheet 1, after release sheet 1 separates with first electrode 201, depart from slide plate 6 and enable to
Release sheet 1 is in the presence of slide plate 6 is departed from away from separated first electrode 201.
The invention particularly discloses the three of over-pressure safety device 2 kind composition form:(1) over-pressure safety device 2 limits for voltage
Type element processed;(2) over-pressure safety device 2 is voltage switch type element;(3) surge protection elements include voltage votage limit type element and
The element connected with voltage switch type element.In the present embodiment, exemplified by being planted by (1).
Tripping mechanism provided by the invention, the top and bottom of voltage switch type element are electrically connected first electrode 201
With second electrode 203.First electrode 201 is connected with release sheet 1 by welding stage 3, side and the institute in first electrode 201 of welding stage 3
The first isolation channel 4 is formed between the side hole wall of opened hole 202, the opposite side of welding stage 3 is formed with the opposite side hole wall of through hole 202
Second through hole 202.
Because the both sides of welding stage 3 are hollow structure, therefore, when high current passes through, on the one hand, isolation channel has blocked welding stage 3
The high current of side, reduce the breakdown probability of tripping mechanism;On the other hand, isolation channel reduces the area of welding stage 3 so that
The heating and melting of welding stage 3 or the speed of melting are accelerated.
Embodiment three
As shown in fig. 6, in the present invention provides 3rd embodiment, in the surge protector and embodiment two in the present embodiment
Surge protector structure it is similar, something in common is just repeated no more, only introduces difference.
In the present embodiment, the arc-chute 7 that surge protector also includes being arranged on box body 9 is specifically disclosed;Arc-chute 7 is
Arc arc-chute is that arc-shaped bend or other shapes are bent, it is necessary to explanation, direction of the arc-chute 7 along electric arc, as long as
The arc-chute 7 for meeting that the shape of the length of electric arc arc extinguishing can be increased belongs to the scope of protection of the invention.
Further, in order to improve arc quenching effect, the invention discloses be provided with multiple sprays on the housing 10 of surge protector
Nock 8, and arc spraying mouth 8 towards arc-chute 7 export electric arc outlet.
Surge protector disclosed by the invention, when trip gear acts, release sheet 1 is upspring, and is departed from slide plate 6 and be will be disengaged from piece
1 upspring caused by electric arc push arc-chute 7 to, electric arc can be truncated into several sections after by arc-chute 7 by arc-chute 7, last suitable
The arc road set in arc-chute 7, is sprayed from the arc spraying mouth 8 of arc-chute bottom.
Existing arc-chute 7 is often designed to strip, and the arc road of electric arc is straight, so in limited size
The arc road of lower arc-chute 7 is just very short, it is difficult to effectively weaken electric arc either blow-out so that depart from shell fragment after trip gear action
Electric arc caused by being separated with welding stage can not effectively interdict so that trip gear burns.And the arc of arc-chute 7 disclosed by the invention
Road beveling can effectively lengthen the depth in arc road, weaken electric arc as far as possible, and the terminal in arc road is provided with spray arc
Mouthful, it can go out spray from arc spraying mouth 8 when electric arc is excessive, prevent the limitation because the arc-rupturing capacity of arc-chute 7, cause trip gear
Burnt because electric arc can not extinguish, reduce the probability for causing trip gear to fail because arc energy is excessive.
Without arc-chute 7 and when arc spraying mouth 8, trip gear often can not effectively go out because arc energy is excessive
Arc, cause to burn, and in the present embodiment, by excessive electric arc by arc-chute 7 cut into it is several sections of by energy it is weak after by spray arc
Mouth 8 sprays, and prevents arc energy is excessive from causing trip gear to fail.
" first " in the present invention, " second " etc. are to be distinguished in description, without other particular meanings.
The foregoing description of the disclosed embodiments, professional and technical personnel in the field are enable to realize or using the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and principles disclosed herein and inventive features phase
Consistent most wide scope.