CN106449321A - Insulation shielded small surge protection device - Google Patents
Insulation shielded small surge protection device Download PDFInfo
- Publication number
- CN106449321A CN106449321A CN201610903044.4A CN201610903044A CN106449321A CN 106449321 A CN106449321 A CN 106449321A CN 201610903044 A CN201610903044 A CN 201610903044A CN 106449321 A CN106449321 A CN 106449321A
- Authority
- CN
- China
- Prior art keywords
- insulation shielding
- surge protection
- protection device
- insulation
- external part
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
- H01H71/12—Automatic release mechanisms with or without manual release
- H01H71/14—Electrothermal mechanisms
- H01H71/20—Electrothermal mechanisms with fusible mass
-
- 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
- H01H83/00—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current
- H01H83/10—Protective switches, e.g. circuit-breaking switches, or protective relays operated by abnormal electrical conditions otherwise than solely by excess current operated by excess voltage, e.g. for lightning protection
Landscapes
- Fuses (AREA)
Abstract
The invention discloses an insulation shielded small surge protection device. The device comprises an arc-shielding insulation shielding component composed of an elastic element and an insulation shield, a voltage-sensitive component, a thermal response switch component, an electrode lead-out foot component and a casing body. According to the invention, the device is used for suppressing instantaneous surge overvoltage in electronic and electrical circuits, and the voltage-sensitive component has a close thermal coupling effect with the thermal response switch component. When the voltage-sensitive component continues to heat up due to the instantaneous surge overvoltage on the circuits and other factors, the thermal response switch component operates and ejects for separation due to the thermal coupling of a thermosensitive element body, and at the same time is insulation-shielded and hidden by the insulation shield. The thermal response switch component in operation is effectively prevented from producing arc. Fire and burning hazards caused by short circuit overload of the surge protection device are avoided. The work safety and reliability of electronic and electrical equipment can be improved.
Description
Technical field
The present invention relates to a kind of circuit protection device, the small-sized surge protection device of more particularly, to a kind of insulation shielding.
Background technology
Surge protector or surgesuppressor (surge suppressor), are also surge protection device, be one kind be each
Planting the electronic component on sensitive or expensive electronic equipment, such as computer and communication relevant device provides the guarantor of overvoltage security protection
Protection unit.Existing universal surge protection device can not be arranged on electronic circuit because of factors such as size, mechanisms, so we
Voltage-sensitive protection element (as metal zinc oxide varistor) would generally be directly welded on electronic circuit board and realize protection
Purpose.The material composition of conventional metal zinc oxide varistor fragile catching fire in its short circuit overload, to electronics
Equipment and personal safety produce disaster consequence.So it would be desirable to a kind of low cost, miniaturization, sensitivity are high, safe
Surge protection device, can be applicable to as high-accuracy in communication, computer, TV, air-conditioning etc. control electronic circuit board on, because thunderbolt,
When Electromagnetic Interference produces suddenly momentary spike electric current or overvoltage, this surge protection device energy transient switching absorbs, releases
Power down comes through the effect that voltage plays protection electronic equipment, and can sharp separation be somebody's turn to do when because of short circuit overload or surge failure of apparatus
Surge protection device, it is to avoid fire occurs.
The size of surge protection device general at present is long 90 × 18 × 66mm, and is 40-50kA's using through-current capacity
High-energy varistor provides protection, is typically mounted on and leads as voltage-sensitive protection element, the cabinet equipment for electric power, electronics
On rail.If this kind of surge protection device is applied to microelectronics etc. control on electronic circuit board, its larger size can make peace
Dress is difficult, and increases the cost of product, and surge protection device such at present has volume greatly, high cost, protective capability
Low, the defect such as short-circuit overload capacity difference, it is easy to cause fire incident when using.
The surge protection device of such as existing such function, the method arc extinguishing of its commonly used masking breaking arc, such as
Chinese patent number 201220391070.0 discloses double instruction alarm surge protector and the Chinese patent number of threading off of full mould
201310123306.1 disclosing a kind of design of High-security surge protection device, the switch electrode of this kind of thermal response switch assembly
When heat departs from, its separating action uses masking the mode of breaking arc, and the Zhe Hu mechanism in the method need to have one
Stroke gets to position masking, breaking arc, so its response time length, susceptiveness are poor, short-circuit overload capacity is poor, hides arc machine
The motion of structure because the factors such as deformation easily interrupted it is impossible to effectively be covered and breaking arc action, thus causing surge to protect
Protection unit short-circuit failure.So, such surge protection device will transship moment, overheated and finally cause fire, blast, this calamity
The destruction of difficulty can burn neighbouring electronic equipment, causes personal safety accident.
Content of the invention
It is an object of the invention to overcoming existing surge protection device volume big, manufacturing cost is high and energy is transshipped in short circuit
The defects such as power difference and deficiency, there is provided a kind of small-sized surge protection device of insulation shielding, its not only small volume, low cost, and
And protective capability is strong, safe to use, disaster hidden-trouble can be effectively prevented it is ensured that the safety of electronic equipment and the person.
For achieving the above object, the present invention is achieved by the following technical solutions.
The present invention provides a kind of small-sized surge protection device of insulation shielding, quick including keeping away arc insulation shielding assembly, voltage
Sense assembly, thermal response switch assembly, electrode foot assembly and the housing being made up of inner shell and enclosing cover.Keep away arc insulation shielding assembly bag
Include an insulating shroud and the flexible member being made up of main flexible member and auxiliary elastic element；Voltage-sensitive assembly is by least one
Individual voltage sensitive element, front electrode and backplate composition；Thermal response switch assembly includes temperature-sensitive element body, front electrode is stretched
Go out end and formed the constituted mortise lock fastener of electrical connection successively by leading section, hot fuse part and terminal part；Electrode foot assembly bag
Include flexible conductor, first electrode leading foot and second electrode leading foot.Wherein voltage sensitive element is varistor or electric discharge
The voltage-sensitive components and parts such as pipe or discharging gap, shell dimension minimum can reach 30 × 12.8 × 26mm.
Hot fuse part is thermal fuse-link structure or is made up of, when by hot melt the metal alloy compositions of instant vaporization after fusing
When the transient surges overvoltage in disconnected portion, overcurrent or short-circuit overcurrent exceed preset threshold values, hot fuse part can fuse vaporization,
Thus promote the leading section of mortise lock fastener and end section from, that is, realize surge protection device possess fast under short-circuit overcurrent
The function of fast disjunction.
Insulation shielding is covered with flexible member installation position, insulation shielding room and power arm, is additionally provided with cylinder on power arm；
Terminal part is provided with position-limited wing and pressure sticks up wall, sticks up in pressure and is additionally provided with detent on wall.Position-limited wing greatly enhances inserting latch
The stability in the slip of insulation shielding interior for the part, position-limited wing and detent strengthens terminal part respectively and pressure sticks up wall simultaneously
Rigidity.Flexible member installation position is connected in an insulating shroud with insulation shielding room, with flexible member and the mortise lock fastener of fitting,
Guarantee that elastic stress stress point is arranged on mortise lock fastener rigidity maximum position, avoid mortise lock fastener deformation to greatest extent.
Form the first dielectric chamber and the second dielectric chamber with enclosing cover when inner shell is engaged.First dielectric chamber is provided with two
Individual slot, slot is made up of multiple shaggy block mutual dislocation, and this structure can make the electrode slice being inserted produce tight fit, thus
Reach the purpose of spacing fixation.
Keep away arc insulation shielding assembly and thermal response switch assembly is arranged in the first dielectric chamber；Its voltage-sensitive assembly sets
Put in the second dielectric chamber.Front electrode and backplate are respectively provided at the tow sides of voltage-sensitive assembly, front electrode
External part is located on front electrode, and backplate is provided with backplate external part, and front electrode external part and backplate are stretched
Go out end to be reached in the first dielectric chamber by the second dielectric chamber；Front electrode external part is additionally provided with and stretches out for leading section
Slotted eye, slotted eye is in the first dielectric chamber.
Main flexible member is arranged in the first dielectric chamber, and main flexible member is contained on cylinder simultaneously, power arm acceptor's bullet
Property element biases.An insulating shroud front end is provided with through hole, and through hole is the passage that leading section is stretched out, when an insulating shroud and front electricity
When pole touches in the first dielectric chamber, through hole is relative with slotted eye, to guarantee that leading section can be also cross through hole and slotted eye.Exhausted
Deflection limits device is additionally provided with edge radome, when the elastic stress effect of power arm acceptor's flexible member drives an insulating shroud
During action, deflection limits device can be prevented effectively from the screens fault causing because the deflection angle of an insulating shroud motion is excessive,
Enhance the reliability of an insulating shroud motion.
Steam vent is additionally provided with an insulating shroud, steam vent is communicated with insulation shielding room；When mortise lock fastener passes through position-limited wing
It is placed on insulation shielding indoor, and when through hole is stretched out in leading section, hot fuse part is corresponding with the position of steam vent, to guarantee hot melt
Disconnected portion fuses when vaporizing under short-circuit overcurrent, and the blast that it produces can be released by steam vent, can reach profit simultaneously
Elongate and blow the effect of electric arc with blast moment.Now pressure, auxiliary corresponding with the position of flexible member installation position of sticking up wall
Flexible member is arranged in flexible member installation position, and pressure sticks up wall and biased by auxiliary elastic element.
Temperature-sensitive element body is meltable metal alloy solder or conducting polymer, and the threshold temperature of its fusing can be preset,
When reaching preset threshold temperature, temperature-sensitive element knows from experience rapid fusing.
The present invention further illustrates, and surge protection device also includes instruction device and the remote signalling alarm indicating its working condition
Device.Instruction device is electric instruction device, such as light emitting diode, or mechanical indication means.Relevant position in enclosing cover
It is provided with the indication window for showing instruction device operating state, that is, surge protection device has working condition instruction and remote signalling
The function of alarm.When being worked using surge protection device in the power supply system, mortise lock fastener is arranged on the insulation of an insulating shroud
Shielding is indoor, and through hole and slotted eye are stretched out in leading section, and front electrode external part and leading section are passed through temperature-sensitive element body melting welding and constituted electricity
Connect, and there is close thermal coupling；First electrode leading foot and second electrode leading foot pass through two slots respectively and enter the
One dielectric chamber；Backplate external part is inner with first electrode leading foot by way of metal alloy solder soldering to constitute electricity
Connect, the two ends of flexible conductor by way of metal alloy solder soldering or spot welding respectively with terminal part and second electrode leading foot
Inner composition electrical connection；First electrode leading foot outer end and second electrode leading foot outer end are stretched out and are become external pin outside inner shell,
And this two external pins are connected respectively on phase line and the neutral conductor or ground wire.Thus thermal response switch assembly and voltage-sensitive
Assembly series connection forms normally closed working condition, as surge protection device normal operating conditions.
First dielectric chamber is additionally provided with and is dielectrically separated from grid and Chu Na insulation tank.It is dielectrically separated from grid by the first dielectric chamber
Upper backplate external part region is isolated into dielectric chamber.Between phase different electrode, form electrical isolation, it is to avoid different
Electrode because in the first dielectric chamber air ionization puncture and lead to short circuit.Storage receives insulation tank by one or more independent groove groups
Become, and store up and receive insulation tank and be arranged on front electrode and stretch out around end position.Storage is received insulation tank and is enhanced on the first dielectric chamber
Front electrode stretches out the dielectric strength around end position, and when temperature-sensitive element body is reaching preset threshold temperature fusing, heat
During responding to switch components apart, storage is received insulation tank and the solder of splashing is stored in groove, and forms spacer insulator, prevents because of weldering
Material wire drawing continues turning circuit.
Further, the present invention evade cut-off electric arc and under short-circuit overcurrent quick isolation switch electrode function
Technology is described as follows：
If voltage sensitive element causes electricity because of the leakage current of the short-circuit overcurrent on circuit and the aging generation of its shelf-life
Pressure-sensitive sensing unit temperature rise, in this temperature transfer to front electrode, promotes the temperature-sensitive element body on front electrode external part to reach
Preset temperature threshold values and melt, pressure sticks up wall under the elastic stress of auxiliary elastic element acts on, by front end before electric arc produces
The insulation shielding that portion launches rapidly and is dielectrically separated from an insulating shroud is indoor, and the elasticity of power arm acceptor flexible member should simultaneously
Power effect promotes an insulating shroud to the direction ejection away from front electrode external part.The temperature-sensitive element of fusing on leading section
Body is struck off by through hole, now forms the dielectric strength of abundance between front electrode external part and leading section, has thoroughly completely cut off mortise lock
Electrical connection between fastener and front electrode external part.
Another kind of situation, if exceeded preset by the transient surges overvoltage of mortise lock fastener, overcurrent or short circuit current
During threshold values, hot fuse part moment fusing vaporization thereon causes leading section and end section from pressure sticks up wall and is subject to assist bullet simultaneously
Property element elastic stress effect promote terminal part to away from front electrode external part direction ejection, power arm acceptor elasticity unit
Part elastic stress effect promote an insulating shroud to away from front electrode external part direction ejection, wherein terminal part insulation every
Indoor from the insulation shielding in an insulating shroud.So, form the dielectric strength of abundance between leading section and terminal part, thoroughly prevent
The electric arc that only leading section is produced in disjunction with terminal part forms electrical breakdown；Blast at its hot fuse part another passes through aerofluxuss
Released in hole, simultaneously moment elongate and blow the electric arc because producing when leading section and terminal part disjunction.
Now the working condition of thermal response switch assembly by normally closed be changed into normally opened, during finger on surge protection device
Showing device is moved displacement, its from normal operating conditions different change can be observed from indication window and (is such as changed into redness
Display), the on off state of remote signalling alarm device also changes simultaneously, thus sending signal of telecommunication instruction surge protection device protection
Lost efficacy.
Compared with prior art, the following distinguishing feature that the present invention possesses：
1st, the surge protection device small volume of the present invention, size can reach 30 × 12.8 × 26mm, can be used in microelectronics
Deng on accurate control circuit board, provide finer safeguard protection.
What the 2nd, the surge protection device of the present invention had a high breaking keeps away arc ability, can fast and safely isolating and protecting device, keep away
Exempt from fire to occur.
3rd, described thermal response switch assembly energy insulation shielding mortise lock fastener when temperature rise of being heated separates, does not also produce in electric arc
Just already formed with the insulation clearance imitated when raw, thoroughly prevent electric arc from producing；Or can break after insulation arc in hot fuse portion.
4th, the surge protection device of the present invention greatly improves inserting latch by the design such as position-limited wing and deflection limits device
Reliability when part and an insulating shroud motion；Strengthen mechanism also by being dielectrically separated from the insulation measures such as grid and Chu Na insulation tank
The isolation of electric arc when separating, can more effectively avoid the electric arc causing because heat departs to cause the hidden of the secondary conducting of surge protection device
Suffer from, improve the safety of electric equipment operation, this is not available for general surge protector.
Brief description
Fig. 1 is that the structure of surge protection device in the embodiment of the present invention 1 disassembles schematic diagram；
Fig. 2 is the structure schematic diagram of inner shell in the embodiment of the present invention 1；
Fig. 3 is the generalized section of surge protection device normal operating conditions in the embodiment of the present invention 1；
Fig. 4 is the generalized section after surge protection device fault heat dropout in the embodiment of the present invention 1；
Fig. 5 is the generalized section after surge protection device fault current cut-offs in the embodiment of the present invention 1；
Fig. 6 is the combining structure schematic diagram of inner shell and an insulating shroud in the embodiment of the present invention 2；
Fig. 7 is the structural representation of mortise lock fastener in the embodiment of the present invention 2；
Fig. 8 is the generalized section of surge protection device normal operating conditions in the embodiment of the present invention 2；
Fig. 9 is the generalized section after surge protection device fault heat dropout in the embodiment of the present invention 2；
Figure 10 is the generalized section after surge protection device fault current cut-offs in the embodiment of the present invention 2；
Figure 11 is the structural representation of voltage-sensitive assembly in the embodiment of the present invention 3.
Reference：1- inner shell, 1a- first dielectric chamber, 1b- second dielectric chamber, 1c- first end, 1d- second end,
11- slot, 12- is dielectrically separated from grid, and insulation tank is received in 13- storage, 14- first electrode hole, 15- second electrode hole, 16- chute, and 17- is distant
Letter groove, 2- enclosing cover, 21- indication window, the main stage clip of 3a-, 3b- auxiliary stage clip, 4- an insulating shroud, 4a- through hole, 4b- steam vent,
41- flexible member installation position, 42- insulation shielding room, 43- power arm, 43a- cylinder, 44- deflects limits device, 5- voltage-sensitive
Assembly, 5a- front electrode, 5b- backplate, 5c- varistor, 51- front electrode external part, 51a- slotted eye, 52- back side electricity
Pole external part, 6- mortise lock fastener, 61- leading section, the hot fuse part of 62-, 63- terminal part, 63a- position-limited wing, 63b- pressure sticks up wall,
7- copper pigtail line, 8- first electrode leading foot, 8a- first electrode leading foot outer end, 8b- first electrode leading foot is inner, 9- second
Electrode lead-out pins, 9a- second electrode leading foot outer end, 9b- second electrode leading foot is inner, 10- instruction device, and 20- remote signalling is accused
Alarm device, 20a- alerts leading foot, 30- temperature-sensitive element body.
Specific embodiment
The present invention is described in more detail with reference to the accompanying drawings and detailed description, but protection scope of the present invention
It is not limited solely to following preferred embodiment, every current interruption is strengthened by insulation shielding mortise lock fastener in the present invention
The technical scheme of insulation effect, all within the scope of the present invention；In the present invention, surge protection device is to main flexible member, auxiliary
The material type helping flexible member, voltage sensitive element and flexible conductor is not limited, in following specific embodiment, with master
Pressing aid spring 3b supplemented by stage clip 3a based on flexible member 3a, auxiliary elastic element 3b, voltage sensitive element 5c are varistor 5c, soft
As a example conductor 7 is copper pigtail line 7, described in detail the structure of surge protection device of the present invention.
Embodiment 1：
As depicted in figs. 1 and 2, the small-sized surge protection device of a kind of insulation shielding, including inner shell 1, enclosing cover 2, main stage clip
3a, auxiliary stage clip 3b, an insulating shroud 4, voltage-sensitive assembly 5, copper pigtail line 7, first electrode leading foot 8, second electrode are drawn
Foot 9, instruction device 10, remote signalling alarm device 20, temperature-sensitive element body 30 and successively by leading section 61, hot fuse part 62 and end
Portion 63 forms the constituted mortise lock fastener 6 of electrical connection.The vertical bending in terminal part 63 both sides forms two position-limited wing 63a, and at end
On the axis of end 63, pressing and bending formation pressure sticks up wall 63b, and it is substantially vertical with terminal part 63 that pressure sticks up wall 63b；Stick up in pressure
Detent is also stamped with wall 63b.
The front electrode 5a of voltage-sensitive assembly 5 and backplate 5b are respectively welded at pressure-sensitive respectively by way of soldering
In positive and negative two silver electrode surface of resistance 5c, wherein front electrode 5a there is front electrode external part 51, stretches in front electrode
Go out and also have, on end 51, the slotted eye 51a stretching out for leading section 61；The part that backplate 5b extends bending from its plane is formed
Backplate external part 52.Inner shell 1 is closed-in construction, when inner shell 1 is when enclosing cover 2 is combined by way of lock, in inner shell 1
Front can form the first dielectric chamber 1a, the second dielectric chamber 1b can be formed at the back side of inner shell 1.When voltage-sensitive assembly 5
When being placed in the second dielectric chamber 1b, front electrode external part 51 and backplate external part 52 pass through to pass through on inner shell 1 respectively
Wear the first dielectric chamber 1a and the first electrode hole 14 of the second dielectric chamber 1b and second electrode hole 15 reaches the first insulated cavity
Body 1a, now slotted eye 51a is also in the first dielectric chamber 1a.Two slots 11 in left and right, absolutely are provided with the first dielectric chamber 1a
Insulation tank 13, chute 16 and remote signalling groove 17 are received in edge isolated gate 12, storage.Wherein slot 11 is made up of multiple shaggy block mutual dislocation；
Being dielectrically separated from grid 12 is air gap structure, and second electrode hole 15 peripheral region is dielectrically separated from by it；Storage receives insulation tank 13 by two
Individual stripe composition, it is arranged on the right side of first electrode hole 14；Chute 16 is connected with being dielectrically separated from grid 12.
An insulating shroud 4 is the box like structure with cavity, and its cavity is flexible member installation position 41 and insulation shielding room
42.Its elastic element installation position 41 is communicated with insulation shielding room 42.An insulating shroud 4 antetheca is provided with and stretches out for leading section 61
Through hole 4a.It is provided with a power arm 43 that can put into chute 16 in an insulating shroud 4 side, power arm 43 is additionally provided with cylinder
43a.When front electrode external part 51 stretches out first electrode hole 14, it is sliding on chute 16 that an insulating shroud 4 passes through power arm 43
Move until touching front electrode external part 51, now through hole 4a is corresponding with the position of slotted eye 51a.In an insulating shroud 4 also
It is provided with steam vent 4b, steam vent 4b is communicated with insulation shielding room 42.When mortise lock fastener 6 is hidden in insulation shielding room 42, front end
When through hole 4a is stretched out in portion 61, hot fuse part 62 is corresponding with the position of steam vent 4b, and pressure sticks up wall 63b and flexible member installation position
41 position is also corresponding.
In the present embodiment, deflection limits device 44 is a straight-bar, and it is located on the left of an insulating shroud 4 antetheca and hangs down therewith
Directly；Instruction device 10 is a baffle plate, and it is located in front of the right side of an insulating shroud 4, is an entirety with an insulating shroud 4, outside
Relevant position on lid 2 is provided with the indication window 21 of display instruction device 10 state；Remote signalling alarm device 20 is independent switch；Heat
Fuse part 62 is a kind of thermal fuse-link structure.
As shown in figure 3, remote signalling alarm device 20 is arranged in remote signalling groove 17, its alarm leading foot 20a stretches out outside inner shell 1.
Main stage clip 3a is arranged in chute 16, and an insulating shroud 4 is passed through power arm 43 and deflection limits device 44 is spacing to slip in chute
Until touching front electrode external part 51, now main stage clip 3a is socketed on cylinder 43a, and is in compressive state.Auxiliary stage clip 3b
Be arranged in flexible member installation position 41, in mortise lock fastener 6 insertion insulation shielding room 42 until leading section 61 stretch out through hole 4a and
Slotted eye 51a, it is in compressive state that pressure stick up wall 63b compressing auxiliary stage clip 3b to make it.Leading section 61 pass through temperature-sensitive element body 30 with just
Face electrode external part 51 soldering forms electrical connection；First electrode leading foot 8 and second electrode leading foot 9 pass through left and right two respectively
Slot 11 is fixed on inner shell 1, and so that first electrode leading foot outer end 8a and second electrode leading foot outer end 9a is stretched out outside inner shell 1
Become external pin, the two ends of copper pigtail line 7 by way of spot welding respectively with terminal part 63 and second electrode leading foot the inner 9b
Form electrical connection；Backplate external part 52 inner 8b shape with first electrode leading foot by way of metal alloy solder soldering
Become electrical connection, the formation normally closed switch thus these electric conductors are connected with voltage-sensitive assembly 5.Protected using surge in the power supply system
During protection unit work, two external pins are connected respectively on phase line and the neutral conductor or ground wire, now instruction device 10 is in
First end 1c of inner shell 1 outer wall, indication window 21 is also corresponding with first end 1c position, and the switch of remote signalling alarm device 20 is moved
The compressing of the arm of force 43, as surge protection device normal operating conditions.
If as shown in figure 4, varistor 5c is because of the electric leakage of the short-circuit overcurrent on circuit and the aging generation of its shelf-life
Stream causes varistor 5c temperature rise, in this temperature transfer to front electrode external part 51, promotes temperature-sensitive element body 30 thereon
Reach preset temperature threshold values and melt, pressure sticks up wall 63b and acted on rapid for leading section 61 bullet by the elastic stress of auxiliary stage clip 3b
Penetrate and insulation shielding is in insulation shielding room 42, the elastic stress effect of power arm 43 acceptor stage clip 3a simultaneously promotes insulation shielding
Cover 4 slides into chute 16 end and is obstructed static to the direction ejection away from front electrode external part 51, final power arm 43.Cross
In journey, instruction device 10 moves to the second end 1d from first end 1c, and the switch of remote signalling alarm device 20 is no longer influenced by oppressing, promotes
Its on off state changes.So both complete a mechanical Indication of Losing Efficacy, send this surge protection device simultaneously again
The remote signalling signal of telecommunication of shielding failure.Now, form sufficiently large insulation clearance between leading section 61 and front electrode external part 51,
Thoroughly completely cut off the electrical connection between mortise lock fastener 6 and front electrode external part 51.
If another kind of situation is as shown in figure 5, pass through the transient surges overvoltage of mortise lock fastener 6, overcurrent or short circuit current
When exceeding preset threshold values, hot fuse part 62 moment fusing vaporization thereon causes leading section 61 and terminal part 63 to separate, simultaneously
Pressure sticks up wall 63b and is subject to the elastic stress effect of auxiliary stage clip 3b to promote terminal part 63 to launch to the direction away from leading section 61, moves
The elastic stress effect of the arm of force 43 acceptor stage clip 3a promotes an insulating shroud 4 to the direction bullet away from front electrode external part 51
Penetrate, final power arm 43 slides into chute 16 end and is obstructed static.During instruction device 10 move to from first end 1c
Two end 1d, the switch of remote signalling alarm device 20 is no longer influenced by oppressing, and promotes its on off state to change.So both completed one
Individual mechanical Indication of Losing Efficacy, sends the remote signalling signal of telecommunication of this surge protection device shielding failure simultaneously again.Now, leading section 61
Form sufficiently large insulation clearance and terminal part 63 between, thoroughly completely cut off the electricity between terminal part 63 and front electrode external part 51
Connect.
Embodiment 2：
A kind of another embodiment of the small-sized surge protection device of the insulation shielding of the present invention.This embodiment have with
In embodiment 1, the similar structure of most of assembly and usage, differ primarily in that inner shell 1, an insulating shroud 4 and mortise lock fastener 6
Structure different.
As shown in fig. 6, being the structure of inner shell 1 and an insulating shroud 4 in the present embodiment, being wherein dielectrically separated from grid 12 is two pieces
Independent diaphragm structure.Deflection limits device 44 is a circular rod, and it is connected with power arm 43.It is dielectrically separated from grid 12 and deflection limit
Device 44 processed is common to form dielectric chamber by second electrode hole 15 peripheral region.Storage receives insulation tank 13 by a circular arc groove group
Become, it is arranged around first electrode hole 14.
As shown in fig. 7, being the structure of mortise lock fastener 6 in the present embodiment, wherein hot fuse part 62 is by energy moment after fusing
The metal alloy compositions of vaporization are made.
As shown in figure 8, remote signalling alarm device 20 is arranged in remote signalling groove 17, its alarm leading foot 20a stretches out outside inner shell 1.
Main stage clip 3a is arranged in chute 16, and an insulating shroud 4 is passed through power arm 43 and deflection limits device 44 is spacing to slip in chute
Until touching front electrode external part 51, now main stage clip 3a is socketed on cylinder 43a, and is in compressive state.Auxiliary stage clip 3b
Be arranged in flexible member installation position 41, in mortise lock fastener 6 insertion insulation shielding room 42 until leading section 61 stretch out through hole 4a and
Slotted eye 51a, it is in compressive state that pressure stick up wall 63b compressing auxiliary stage clip 3b to make it.Leading section 61 pass through temperature-sensitive element body 30 with just
Face electrode external part 51 soldering forms electrical connection；First electrode leading foot 8 and second electrode leading foot 9 pass through left and right two respectively
Slot 11 is fixed on inner shell 1, and so that first electrode leading foot outer end 8a and second electrode leading foot outer end 9a is stretched out outside inner shell 1
Become external pin, the two ends of copper pigtail line 7 by way of metal alloy solder soldering respectively with terminal part 63 and second electrode
Leading foot the inner 9b forms electrical connection；Backplate external part 52 is drawn with first electrode by way of metal alloy solder soldering
Go out foot the inner 8b and form electrical connection, the formation normally closed switch thus these electric conductors are connected with voltage-sensitive assembly 5.In power-supply system
During middle use surge protection device work, two external pins are connected respectively on phase line and the neutral conductor or ground wire, now refer to
Showing device 10 is in first end 1c of inner shell 1 outer wall, and indication window 21 is also corresponding with first end 1c position, remote signalling alarm device
20 switch is subject to oppressing of power arm 43, as surge protection device normal operating conditions.
If as shown in figure 9, varistor 5c is because of the electric leakage of the short-circuit overcurrent on circuit and the aging generation of its shelf-life
Stream causes varistor 5c temperature rise, in this temperature transfer to front electrode external part 51, promotes temperature-sensitive element body 30 thereon
Reach preset temperature threshold values and melt, pressure sticks up wall 63b and acted on rapid for leading section 61 bullet by the elastic stress of auxiliary stage clip 3b
Penetrate and insulation shielding is in insulation shielding room 42, the elastic stress effect of power arm 43 acceptor stage clip 3a simultaneously promotes insulation shielding
Cover 4 to the direction ejection away from front electrode external part 51, final deflection limits device 44 touch chute 16 top be obstructed quiet
Only.During instruction device 10 move to the second end 1d from first end 1c, the switch of remote signalling alarm device 20 is no longer influenced by oppressing,
Its on off state is promoted to change.So both complete a mechanical Indication of Losing Efficacy, send this surge protection simultaneously again
The remote signalling signal of telecommunication that unit protection was lost efficacy.Now, form sufficiently large insulation between leading section 61 and front electrode external part 51
Spacing, has thoroughly completely cut off the electrical connection between mortise lock fastener 6 and front electrode external part 51.
Another kind of situation is as shown in Figure 10, if by the transient surges overvoltage of mortise lock fastener 6, overcurrent or short circuit current
When exceeding preset threshold values, hot fuse part 62 moment fusing vaporization thereon causes leading section 61 and terminal part 63 to separate, simultaneously
Pressure sticks up wall 63b and is subject to the elastic stress effect of auxiliary stage clip 3b to promote terminal part 63 to launch to the direction away from leading section 61, moves
The elastic stress effect of the arm of force 43 acceptor stage clip 3a promotes an insulating shroud 4 to the direction bullet away from front electrode external part 51
Penetrate, final deflection limits device 44 touch chute 16 top be obstructed static.During instruction device 10 from first end 1c move
To the second end 1d, the switch of remote signalling alarm device 20 is no longer influenced by oppressing, and promotes its on off state to change.So both complete
One mechanical Indication of Losing Efficacy, sends the remote signalling signal of telecommunication of this surge protection device shielding failure simultaneously again.Now, front end
Form sufficiently large insulation clearance between portion 61 and terminal part 63, thoroughly completely cut off between terminal part 63 and front electrode external part 51
Electrical connection.
Embodiment 3：
As shown in figure 11, voltage-sensitive assembly 5 is pressure-sensitive by two for the another embodiment of voltage-sensitive assembly 5 of the present invention
Resistance 5c, front electrode 5a and backplate 5b composition.Wherein backplate 5b by way of soldering by two varistors
Its two relative silver electrode surface of 5c are electrically connected；Front electrode 5a is by way of soldering by two varistor 5c
Its remaining two silver electrode surface is electrically connected.There is front electrode external part 51, in front on wherein front electrode 5a
The slotted eye 51a stretching out for leading section 61 is also had on electrode external part 51；Backplate 5b extends the portion of bending from its plane
Divide and define backplate external part 52, that is, this voltage-sensitive assembly 5 is composed in parallel by two varistor 5c.
Feature described in the various embodiments described above or combinations of features can individualism, or can with other embodiment in
Feature or combinations of features be combined with each other, and those skilled in the art quickly can be kept away using insulation shielding cover structure according to the present invention
Arc is isolated mortise lock fastener and is departed from the feelings of the innovation and creation of kinetic stability using deflection limits device and terminal part structural strengthening
Under condition, above-described embodiment is made with various modifications or change dissolves other embodiments, be all belonging to protection scope of the present invention.
Claims (10)
1. the small-sized surge protection device of a kind of insulation shielding, including：
Keep away arc insulation shielding assembly, including an insulating shroud (4) and by main flexible member (3a) and auxiliary elastic element (3b)
The flexible member of composition；
Voltage-sensitive assembly (5), by least one voltage sensitive element (5c), front electrode (5a) and backplate (5b) group
Become；
Thermal response switch assembly, including temperature-sensitive element body (30), front electrode external part (51) and by leading section (61), hot melt
The mortise lock fastener (6) that disconnected portion (62) and terminal part (63) form；
Electrode lead-out pins assembly, including flexible conductor (7), first electrode leading foot (8) and second electrode leading foot (9)；
Housing, including inner shell (1) and enclosing cover (2)；
It is characterized in that：Described an insulating shroud (4) is provided with flexible member installation position (41), insulation shielding room (42) and power
Arm (43), its elastic element installation position (41) is connected in an insulating shroud (4) with insulation shielding room (42), power arm (43)
It is provided with cylinder (43a)；
The terminal part (63) of described mortise lock fastener (6) is provided with position-limited wing (63a) and pressure sticks up wall (63b)；Described mortise lock fastener
(6) slided in insulation shielding room (42) by position-limited wing (63a)；Stick up in pressure and be additionally provided with detent on wall (63b)；
Described mortise lock fastener (6) is the disconnected release unit of a hot melt, is provided with hot fuse part (62) and assistant spring unit
Part (3b), can promote mortise lock fastener quick acting to depart from and insulation shielding；
Described inner shell (1) forms the first dielectric chamber (1a) and the second dielectric chamber (1b) with enclosing cover (2) when engaging；Described
Keep away arc insulation shielding assembly and thermal response switch assembly is located in the first dielectric chamber (1a)；Described voltage-sensitive assembly (5) position
In the second dielectric chamber (1b).
2. a kind of insulation shielding according to claim 1 small-sized surge protection device it is characterised in that：
Described voltage sensitive element (5c) is varistor or discharge tube or discharging gap；
Described front electrode (5a) and backplate (5b) are respectively provided at the tow sides of voltage-sensitive assembly (5), described just
Face electrode external part (51) is located on front electrode (5a), and backplate (5b) is provided with backplate external part (52), front
Electrode external part (51) and backplate external part (52) are reached in the first dielectric chamber (1a) by the second dielectric chamber (1b)；
Front electrode external part (51) is provided with slotted eye (51a), and slotted eye (51a) is in the first dielectric chamber (1a)；
Described main flexible member (3a) is arranged in the first dielectric chamber (1a), and main flexible member (3a) is contained in cylinder (43a)
On, power arm (43) acceptor's flexible member (3a) biases；
Described an insulating shroud (4) front end is provided with through hole (4a), is the passage that the leading section (61) of mortise lock fastener (6) is stretched out,
When an insulating shroud (4) and front electrode external part (51) touch in the first dielectric chamber (1a), through hole (4a) and slotted eye
(51a) relatively；Described an insulating shroud (4) is provided with steam vent (4b), and steam vent (4b) is communicated with insulation shielding room (42)；When slotting
Snap close piece (6) is placed in insulation shielding room (42) by position-limited wing (63a), when leading section (61) stretch out through hole (4a), hot melt
Disconnected portion (62) is corresponding with the position of steam vent (4b), and pressure sticks up the position of wall (63b) and flexible member installation position (41) simultaneously
Corresponding；Described auxiliary elastic element (3b) is arranged in flexible member installation position (41), and pressure sticks up wall (63b) and is subject to assistant spring
Element (3b) biases；
Described thermal response switch assembly is normally closed switch in normal operating conditions, wherein front electrode external part (51) with front
End (61) is passed through temperature-sensitive element body (30) melting welding and is constituted electrical connection, and has close thermal coupling, described temperature-sensitive element body
(30) preset fusion temperature threshold values.
Described the first dielectric chamber (1a) is provided with two slots (11), and slot (11) is by multiple shaggy block mutual dislocation groups
Become；Described first electrode leading foot (8) and second electrode leading foot (9) pass through two slots (11) respectively and enter the first insulation
Cavity (1a)；Described backplate external part (52) is inner with first electrode leading foot by way of metal alloy solder soldering
(8b) constitute electrical connection, the two ends of described flexible conductor (7) by way of metal alloy solder soldering or spot welding respectively with end
Portion (63) and second electrode leading foot the inner (9b) constitute electrical connection；First electrode leading foot outer end (8a) and second electrode are drawn
Foot outer end (9a) is stretched out becomes external pin outside inner shell (1).
3. a kind of insulation shielding according to claim 1 and 2 small-sized surge protection device it is characterised in that：Described
First dielectric chamber (1a) is provided with and is dielectrically separated from grid (12), is dielectrically separated from grid (12) and the first dielectric chamber (1a) is isolated into two
Individual dielectric chamber.
4. a kind of insulation shielding according to claim 1 and 2 small-sized surge protection device it is characterised in that：Described
First dielectric chamber (1a) is provided with storage and receives insulation tank (13), and storage receives insulation tank (13) by one or more independent groove groups
Become, and store up and receive insulation tank (13) and be arranged on around front electrode external part (51) extended position.
5. a kind of insulation shielding according to claim 1 and 2 small-sized surge protection device it is characterised in that：Described
An insulating shroud (4) is provided with deflection limits device (44).
6. a kind of insulation shielding according to claim 1 and 2 small-sized surge protection device it is characterised in that：Described
When temperature-sensitive element body (30) is because reaching preset fusion temperature fusing, pressure sticks up the bullet that wall (63b) is subject to auxiliary elastic element (3b)
Property stress promote the ejection of leading section (61) and front electrode external part (51) to separate, and leading section (61) are dielectrically separated from
In insulation shielding room (42), the elastic stress effect of power arm (43) acceptor's flexible member (3a) simultaneously promotes to keep away arc insulation shielding
Assembly moves to the direction away from front electrode external part (51).
7. a kind of insulation shielding according to claim 1 and 2 small-sized surge protection device it is characterised in that：Described
Hot fuse part (62) because transient surges overvoltage, overcurrent or the short circuit current passing through exceed its preset threshold values when, hot melt breaks
The fusing vaporization of portion's (62) moment causes leading section (61) and terminal part (63) to separate, and pressure sticks up wall (63b) by assistant spring simultaneously
The elastic stress effect of element (3b) promotes terminal part (63) to the direction ejection away from front electrode external part (51), power arm
(43) the elastic stress effect of acceptor's flexible member (3a) promotes to keep away arc insulation shielding assembly to away from front electrode external part
(51) direction ejection, wherein terminal part (63) is dielectrically separated from insulation shielding room (42).
8. a kind of insulation shielding according to claim 6 small-sized surge protection device it is characterised in that：Described temperature-sensitive
Element body (30) is meltable metal alloy solder or conducting polymer.
9. a kind of insulation shielding according to claim 1 or 7 small-sized surge protection device it is characterised in that：Described
Hot fuse part (62) is thermal fuse-link structure or is made up of the metal alloy compositions of instant vaporization after fusing.
10. the small-sized surge protection device according to a kind of arbitrary described insulation shielding of claim 1 to 9 it is characterised in that：Institute
The surge protection device stated also includes indicating the instruction device (10) of this surge protection device state and indicates this surge protection
The remote signalling alarm device (20) of unit state；Described instruction device (10) is electric instruction device or mechanical indication means, and
Indication window (21) is provided with enclosing cover (2) relevant position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610903044.4A CN106449321A (en) | 2016-10-17 | 2016-10-17 | Insulation shielded small surge protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610903044.4A CN106449321A (en) | 2016-10-17 | 2016-10-17 | Insulation shielded small surge protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106449321A true CN106449321A (en) | 2017-02-22 |
Family
ID=58174826
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610903044.4A Pending CN106449321A (en) | 2016-10-17 | 2016-10-17 | Insulation shielded small surge protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106449321A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879602A (en) * | 2017-05-12 | 2018-11-23 | 瑞凯知识产权发展有限公司 | The surge protection device module and method of switching mechanism are thermally isolated including monoblock type |
| CN109541286A (en) * | 2018-12-27 | 2019-03-29 | 方圆广电检验检测股份有限公司 | A kind of pick-up current detection method and tester |
| WO2020233667A1 (en) * | 2019-05-22 | 2020-11-26 | 厦门赛尔特电子有限公司 | Overheating and overcurrent tripping device and surge protector |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685723A (en) * | 2008-09-24 | 2010-03-31 | 游聪谋 | Circuit protection structure with double temperature induction switching-off |
| CN102916419A (en) * | 2012-11-07 | 2013-02-06 | 东莞市华炜雷电防护设备有限公司 | Power supply surging protector with automatic arc breakage device and protection method for same |
| CN204204540U (en) * | 2014-11-30 | 2015-03-11 | 常州市创捷防雷电子有限公司 | There is the varistor of tripping electrode |
| CN104505319A (en) * | 2015-01-13 | 2015-04-08 | 四川中光防雷科技股份有限公司 | Separating and arc shielding device and small-sized high-safety surge protection device provided with same |
| CN106026067A (en) * | 2016-05-17 | 2016-10-12 | 广西新全通电子技术有限公司 | Arc-preventing fast-breaking surge protector |
-
2016
- 2016-10-17 CN CN201610903044.4A patent/CN106449321A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101685723A (en) * | 2008-09-24 | 2010-03-31 | 游聪谋 | Circuit protection structure with double temperature induction switching-off |
| CN102916419A (en) * | 2012-11-07 | 2013-02-06 | 东莞市华炜雷电防护设备有限公司 | Power supply surging protector with automatic arc breakage device and protection method for same |
| CN204204540U (en) * | 2014-11-30 | 2015-03-11 | 常州市创捷防雷电子有限公司 | There is the varistor of tripping electrode |
| CN104505319A (en) * | 2015-01-13 | 2015-04-08 | 四川中光防雷科技股份有限公司 | Separating and arc shielding device and small-sized high-safety surge protection device provided with same |
| CN106026067A (en) * | 2016-05-17 | 2016-10-12 | 广西新全通电子技术有限公司 | Arc-preventing fast-breaking surge protector |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108879602A (en) * | 2017-05-12 | 2018-11-23 | 瑞凯知识产权发展有限公司 | The surge protection device module and method of switching mechanism are thermally isolated including monoblock type |
| CN109541286A (en) * | 2018-12-27 | 2019-03-29 | 方圆广电检验检测股份有限公司 | A kind of pick-up current detection method and tester |
| WO2020233667A1 (en) * | 2019-05-22 | 2020-11-26 | 厦门赛尔特电子有限公司 | Overheating and overcurrent tripping device and surge protector |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106026067B (en) | A kind of surge protection device of the quick disjunction of anti-arc | |
| US9443689B2 (en) | Fuse | |
| CN103620703A (en) | Thermal metal oxide varistor circuit protection device | |
| CN106298390A (en) | A kind of novel surge protection device | |
| CN106716591A (en) | Fuse for a device to be protected | |
| CN106449321A (en) | Insulation shielded small surge protection device | |
| JP2010211928A (en) | Spd with breaker plate | |
| CN106684848B (en) | A kind of surge protection device with high-performance anti-arc guard arc extinguishing | |
| US20170222426A1 (en) | Surge protection device with an independent chamber comprising a fuse for overcurrent protection | |
| CN206163439U (en) | Novel surge protection device | |
| CN205622224U (en) | Preventing arc type divides disconnected surge protection device fast | |
| CN206322657U (en) | A kind of small-sized surge protection device of insulation shielding | |
| CN107516886A (en) | A kind of quick disjunction preventing arc and arc extinction type surge protection device and its application | |
| CN206164089U (en) | Surge protection device with high performance preventing arc cover arc extinguishing | |
| CN107516883A (en) | A kind of anti-arc circuit protection device and its application | |
| CN107465179A (en) | A kind of lightning protection device and its application based on electric discharge tubular type sensing element | |
| CN107424881A (en) | A kind of surge protector of quick disjunction and its application | |
| CN107546714A (en) | A kind of Surge Protector and its application | |
| CN108573838B (en) | Disconnecting element and overvoltage protection component | |
| CN107689311A (en) | A kind of disengaged surge protective device and its application | |
| JP6884231B2 (en) | Safety fuses for low voltage applications | |
| CN107516885A (en) | A kind of anti-arc surge protection device of double separation and its application | |
| CN107452568A (en) | A kind of protector of home circuit and its application | |
| CN107516881A (en) | A kind of circuit protection module of duplicate protection and its application | |
| CN107528305A (en) | A kind of surge protective device and its application |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170222 |