CN206164089U - Surge protection device with high performance preventing arc cover arc extinguishing - Google Patents

Abstract

The utility model discloses a surge protection device with high performance preventing arc cover arc extinguishing, draw forth foot, casing and include temperature sensitive element's heat switch subassembly including preventing arc cover, propeller main part, elastic element, voltage sensitive subassembly, electrode. The voltage sensitive subassembly has inseparable thermal coupling with the heat switch subassembly, and when factors such as the instantaneous surge overvoltage on the circuit made the voltage sensitive subassembly hinder the short -circuit current continuous heating intensification for some reason, the heat switch subassembly launched the separation because of temperature sensitive element's hot coupled response action, and the preventing arc covers the electric arc that destroys completely, has avoided electrical equipment's conflagration hidden danger effectively.

Description

A kind of surge protection device with high-performance anti-arc guard arc extinguishing

Technical field

This utility model is related to a kind of circuit protection device, more particularly to a kind of surge with high-performance anti-arc guard arc extinguishing Protection device.

Background technology

Surge protector or surgesuppressor (surge suppressor), are also surge protection device, be one kind be each Electronic component on the electronic equipment of kind sensitivity or costliness, such as computer and communication relevant device provides the guarantor of overvoltage security protection Protection unit.The conventional varistor of existing surge protection device is included by the transgranular granular materialss of Zinc oxide particles and complexity The electronic device of composition, it is a non-linear to voltage device, and unique voltage-current characteristic is the ideal of sensitive electronic circuit Protection device, but it material composition determine from overvoltage short circuit transship when easily deteriorate and catching fire, near Sensitive electronic circuit and element produces catastrophic destruction.So, it would be desirable to a kind of safer more sensitive surge protection Device, can be applicable to the guarantor of such as communication, computer, TV, surge overvoltage short circuit overload on the high precise control circuit of air-conditioning In shield, in short circuit overload, energy fast shut-off separates surge protection device, it is to avoid cause the fire incident of electrical equipment.

The current existing surge protector with arc-suppression function or surgesuppressor, it generally adopts masking and breaking arc Method arc extinguishing, such as Chinese patent number is 201520021698.5 to disclose disengaging and arc device and be provided with its small size with hiding A kind of lightning protection device disclosed in High-security surge protection device and Patent No. 201420526743.8, this kind of thermal switch component is opened When heat departs from, its separating action uses switch electrode and separates along solder side vertical direction for powered-down pole, the movement of Zhe Hu mechanisms The mode of long range breaking arc.The power part that departs from of Simultaneous Switching electrode derives from switch electrode itself alloy material Deformation elastic stress, lacks a reliable and stable disengaging power source, easily causes thermal switch component heat and departs from not in place, hides arc machine The failures such as structure movement screens.Due also to the restriction of switch electrode and screening arc mechanism kinematic mode, causes surge protector to lack height Pitch capability, so, varistor under these conditions in a large number transships moment, overheated and finally cause fire, blast, this Catastrophic destruction can burn the electronic equipment and element of sensitivity nearby, so as to cause whole electronic system collapse to damage.

The content of the invention

The purpose of this utility model is the defect and deficiency for overcoming existing surge protection device in fault reconstruction, is carried A kind of surge protection device with high-performance anti-arc guard arc extinguishing is supplied, there is fast speed heat to depart from for it prevents electric arc from producing and short The function of quick disjunction under the overcurrent of road, can be effectively prevented from causing fire because electric arc is produced, and can fundamentally prevent Disaster hidden-trouble is so as to ensureing the safety of electronic equipment.

For achieving the above object, this utility model is achieved through the following technical solutions.

This utility model provides a kind of surge protection device with high-performance anti-arc guard arc extinguishing, including housing, preventing arc are pushed away Enter device, voltage-sensitive component, thermal switch component and electrode lead-out pins.Housing includes inner shell and enclosing cover；Extinguishing arc is provided with inner shell Plate and arc extinguishing platform；Preventing arc propeller includes anti-arc guard, propeller main body and flexible member；Flexible member include the first elastic component and Second elastic component；Voltage-sensitive component includes at least one voltage sensitive element；Thermal switch component includes temperature-sensitive element, front electricity Pole external part, electrode connecting parts and separation electrode；Separate electrode to be made up of electrode front end, fuse part and electrode end；Electrode draws Go out foot including flexible conductor, first electrode leading foot and second electrode leading foot.Wherein voltage sensitive element be varistor or The voltage-sensitive components and parts such as discharge tube or discharging gap；Muffler plate is provided with the through hole that power pole front end and fuse part are passed through； It is provided with spacing distance between muffler plate and arc extinguishing platform, forms a clearance for insulation, can strengthens when thermal switch component departs from point The dielectric strength of ionization electrode.

Fuse part is thermal fuse-link structure, when by the transient surges overvoltage of fuse part, overcurrent or short circuit overload electricity When stream exceedes preset threshold value, fuse part can fuse vaporization, so as to the electrode front end for promoting separation electrode separates with electrode end, Realize that surge protection device possesses the function of the quick disjunction under short-circuit overcurrent.

Temperature-sensitive element is meltable metal alloy solder or conducting polymer, and the temperature threshold of its fusing can be preset, is reaching During to preset temperature threshold, temperature-sensitive element can melt rapidly.

Its internal insulation forms two dielectric chambers when inner shell is engaged with enclosing cover, respectively the first dielectric chamber and second exhausted Edge cavity.Muffler plate, arc extinguishing platform, preventing arc propeller, thermal switch component and first electrode leading foot are located at the first dielectric chamber；Electricity Pressure sensing assembly and second electrode leading foot are located at the second dielectric chamber.Propeller main body both sides are provided with wing arm, in the first insulation The chute slided for wing arm is provided with cavity.

Slot is provided with arc extinguishing platform, electrode connecting parts are fixed on slot.Electrode connecting parts are by tin plating alloy system Into, it can be made into the form with two adjoining vertical surfaces such as bending lamellar or rectangular block shape or square through-pipe shape, and outside The right angle of dew is provided with chamfering.When orthogonal metal electrode film needs to be consisted of temperature-sensitive element melting welding to be electrically connected, with The welding of electrode connecting parts auxiliary can have preferably connection and heat conductivility.

The tow sides of voltage sensitive element are provided with metal electrode film, and front electrode external part is located at one of metal electricity On pole piece, another metal electrode film is provided with backplate external part.Front electrode external part is stretched out by the second dielectric chamber To in the first dielectric chamber, and smooth abut in electrode connecting parts；Backplate external part is in the second dielectric chamber.

This utility model is further illustrated, and surge protection device is additionally provided with the instruction device and remote signalling for indicating its working condition Alarm device.Instruction device is arranged in propeller main body.The finger being provided with for showing instruction device operating state is covered outside Show that window, i.e. surge protection device have the function that working condition is indicated and remote signalling is alerted.Protected using surge in the power supply system When protection unit works, the first elastic component is arranged in chute, and propeller main body receives the first spring biases by wing arm；Second bullet Property part one end lean against on inner shell, the other end is leaned against on anti-arc guard, anti-arc guard receive the second spring biases.Separate electrode and pass through electrode End is fixed in propeller main body, and electrode front end and fuse part stretch out propeller main body.Electrode front end and fuse part are passed through and disappeared Arc plate, in the smooth electrode connecting parts for abutting in arc extinguishing platform in electrode front end, the connection of front electrode external part, electrode front end and electrode Part constitutes electrical connection by temperature-sensitive element melting welding, and with close thermal coupling.Now, anti-arc guard offsets with propeller main body, And anti-arc guard is located at before the front electrode external part.The two ends of flexible conductor are by metal alloy solder soldering or the side of spot welding Formula is electrically connected respectively at inner composition of electrode end and first electrode leading foot；Backplate external part and second electrode leading foot The inner consists of electrical connection by way of metal alloy solder soldering；Outside first electrode leading foot outer end and second electrode leading foot Two external pins of formation outside housing are stretched out at end, and the two external pins are connected respectively to phase line and the neutral conductor or ground wire On, Operating In Persistent Current Mode state is formed so as to thermal switch component is connected with voltage-sensitive component, as surge protection device normal work State.

Further, fast speed heat of the present utility model departs from prevents electric arc from producing and the quick disjunction under short-circuit overcurrent Technology be 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 external part, promotes temperature-sensitive element thereon to reach preset temperature Threshold value and melt, the elastic stress that propeller main body is superimposed by the second elastic component on the first elastic component and anti-arc guard is made jointly With, promote the electrode that separates being fixed in propeller main body to accelerate to be launched to the direction away from front electrode external part, it is final anti- Arc cover touches and is obstructed static, completely insulated covering arc extinguishing platform, front electrode external part and electrode connecting parts with muffler plate, is formed The dielectric chamber of one autonomous closure；Propeller main body continues the elastic stress effect ejection by the first elastic component, until touching Housing be obstructed it is static, electric arc produce before electrode front end is taken out of rapidly outside muffler plate.Fly during thermal switch component departs from The solder for splashing is stopped by the clearance for insulation between muffler plate and arc extinguishing platform, and the thermal element of the fusing being attached on electrode front end Part is struck off by the through hole on muffler plate, has thoroughly prevented to form the hidden danger for conducting because electric arc is stretched.Now front electrode is stretched Go out between end and electrode front end to be formed the dielectric strength of abundance, thoroughly completely cut off the electricity separated between electrode and front electrode external part Connection.

Another kind of situation, if by separating transient surges overvoltage, overcurrent or the short circuit current of electrode more than preset During threshold value, fuse part moment fusing vaporization thereon causes electrode front end and electrode end to separate, and propeller main body receives the first bullet The elastic stress collective effect that the second elastic component is superimposed on property part and anti-arc guard, promotes the electrode being fixed in propeller main body End accelerate to away from front electrode external part direction launch, final anti-arc guard touch with muffler plate and be obstructed it is static, completely Insulation covers arc extinguishing platform, front electrode external part, electrode connecting parts and electrode front end, forms the insulated cavity of an autonomous closure Body；Propeller main body continue by the first elastic component elastic stress effect ejection, until touch housing be obstructed it is static, electric arc produce Before death by electrode end rapidly away from muffler plate.Thus, the dielectric strength of abundance is formed between electrode front end and electrode end, it is thorough Bottom prevents electrode front end from forming electrical breakdown with the electric arc that electrode end is produced in disjunction.

Now the working condition of thermal switch component is changed into disconnection by closure, during instruction device with propeller main body send out Raw displacement, can be observed its change different from normal operating conditions (as instruction device is stretched out outside housing), together from indication window The on off state of Shi Yaoxin alarm devices also changes, and so as to send the signal of telecommunication surge protection device shielding failure is indicated.

Compared with prior art, the distinguishing feature that this utility model possesses：

What the 1st, surge protection device of the present utility model had a high breaking keeps away arc ability, can fast and safely insulation blocking dress Put, it is to avoid fire occurs.

2nd, surge protection device of the present utility model is by clearance for insulation between anti-arc guard and muffler plate and arc extinguishing platform etc. Insulation measures strengthen the destruction to electric arc and isolation, can more effectively avoid because electric arc causes the secondary conducting of surge protection device Hidden danger, improves the safety of electric equipment operation.

3rd, thermal switch component of the present utility model using along face tangential direction depart from by the way of, more typically along face vertical direction The mode of disengaging more can effectively suppress electric arc, and security and stability is higher；Simultaneously thermal switch component is by two groups of bullets when departing from Completing disengaging action, with higher disengaging reliability, this is general surge protection to the elastic stress that property element is superimposed Not available for device.

Description of the drawings

Fig. 1 is the structural representation of inner shell of the present utility model；

Fig. 2 is the internal structure schematic diagram of surge protection device of the present utility model；

Fig. 3 is the cross-sectional view of surge protection device normal operating conditions of the present utility model；

Fig. 4 is the cross-sectional view after surge protection device failure heat of the present utility model departs from；

Fig. 5 is the cross-sectional view after surge protection device fault current of the present utility model cut-offs.

Labelling in figure：1- inner shells, the dielectric chambers of 1a- first, the dielectric chambers of 1b- second, 11- muffler plates, 11a- through holes, 12- arc extinguishing platforms, 12a- slots, 13- chutes, 2- enclosing covers, 2a- indication windows, 3- propeller main bodys, 31- wing arms, 32- indicates dress Put, the stage clips of 4a- first, the stage clips of 4b- second, 51- front electrode external parts, 6a- electrodes front end, 6b- fuse part, 6c- electrodes end End, 7- electrode connecting parts, 8a- first electrode leading foots outer end, 8b- first electrodes leading foot is inner, 9a- second electrode leading foots Outer end, 10- temperature-sensitive elements, 20- braiding annealed copper wires, 30- anti-arc guards, 40- remote signalling alarm devices.

Specific embodiment

This utility model is further described with reference to the accompanying drawings and detailed description, but it is of the present utility model Protection domain is not limited solely to following preferred embodiment, every to be opened by anti-arc guard cover heating in this utility model Close component and ejection separates electrode to strengthen the technical scheme of current interruption insulation effect, all in protection domain of the present utility model； Material class of the surge protection device to voltage sensitive element, the first elastic component, the second elastic component and flexible conductor in this utility model Type is not limited, and in the following embodiments, with voltage sensitive element as varistor, the first elastic component 4a is the first stage clip 4a, the second elastic component 4b are the second stage clip 4b, as a example by flexible conductor 20 is for braiding annealed copper wire 20, are described in detail this utility model The structure of surge protection device.

A kind of surge protection device with high-performance anti-arc guard arc extinguishing, including inner shell 1, enclosing cover 2, anti-arc guard 30, propulsion 3, two the first stage clip 4a of device main body, the second stage clip 4b, varistor, temperature-sensitive element 10, electrode connecting parts 7, a separation electricity Pole, braiding annealed copper wire 20, first electrode leading foot and second electrode leading foot.Wherein, electrode is separated by electrode front end 6a, fusing Portion 6b and electrode end 6c is constituted；As shown in figure 1, being provided with muffler plate 11 and arc extinguishing platform 12 on inner shell 1；Muffler plate 11 is provided with The through hole 11a that power pole front end 6a and fuse part 6b are passed through；Spacing distance is provided between muffler plate 11 and arc extinguishing platform 12, is formed One clearance for insulation；Fuse part 6b is a kind of thermal fuse-link structure, is the special electric fuse of resistance to thunder；Electrode connecting parts 7 are by plating Rectangular block shape electrode made by stannum red copper, and wherein a right angle is provided with chamfering.

Its internal insulation forms two dielectric chambers when inner shell 1 is engaged with enclosing cover 2, respectively the first dielectric chamber 1a and the Two dielectric chamber 1b.Varistor and second electrode leading foot are placed in the second dielectric chamber 1b.Respectively set in the both sides of propeller main body 3 There is a wing arm 31, the chute 13 slided for wing arm 31 is provided with the first dielectric chamber.Slot is provided with arc extinguishing platform 12 12a, electrode connecting parts 7 are fixed on slot 12a, and expose its chamfering.Two metal electrode films of varistor pass through soldering Mode be welded in positive and negative two silver electrode surfaces of varistor, have front electrode on one of metal electrode film External part 51, another metal electrode film is provided with backplate external part.Front electrode external part 51 is by the second dielectric chamber 1b is reached in the first dielectric chamber 1a, and smooth is abutted in electrode connecting parts 7；Backplate external part is in the second insulated cavity In body 1b.

As shown in Figures 2 and 3, in the present embodiment, instruction device 32 is a push rod, and it is located at the end of propeller main body 3 End, the relevant position on enclosing cover 2 is provided with the indication window 2a for showing the operating state of instruction device 32, remote signalling alarm device 40 is independent switch, and is arranged in enclosing cover 2, and its alarm leading foot is stretched out outside enclosing cover 2.Separate electrode solid by electrode end 6c It is scheduled in propeller main body 3, electrode front end 6a and fuse part 6b stretch out propeller main body 3.Electrode front end 6a and fuse part 6b are worn Muffler plate 11 is crossed, in the smooth electrode connecting parts 7 for abutting in arc extinguishing platform 12 of electrode front end 6a, front electrode external part 51, electrode Front end 6a and electrode connecting parts 7 constitute electrical connection by the melting welding of temperature-sensitive element 10, and with close thermal coupling.Two first pressures Spring 4a is arranged in chute 13, and propeller main body 3 oppresses two the first stage clip 4a by two wing arms 31 so as in compression shape State；Second stage clip 4b one end is leaned against on inner shell 1, and the other end is leaned against on anti-arc guard 30, and anti-arc guard 30 offsets with propeller main body 3, Second stage clip 4b is in compressive state, and now anti-arc guard 30 is located at before front electrode external part 51.The two ends of braiding annealed copper wire 20 lead to The mode for crossing spot welding constitutes electrical connection respectively at electrode end 6c and first electrode leading foot the inner 8b；Backplate external part with Second electrode leading foot the inner consists of electrical connection by way of metal alloy solder soldering；First electrode leading foot outer end 8a and Second electrode leading foot outer end 9a stretches out outside housing two external pins of formation, so as to these electric conductors are connected shape with varistor Into Operating In Persistent Current Mode state.When using surge protection device in the power supply system, the two external pins are connected respectively to phase line On the neutral conductor or ground wire, now, in indication window 2a, the switch of remote signalling alarm device 40 does not receive external carbuncle to instruction device 32 Compressing, the as normal operating conditions of surge protection device.

A specific embodiment of the invention, if varistor is because of the short-circuit overcurrent on circuit and itself longevity The leakage current for ordering aging generation causes varistor temperature rise, in this temperature transfer to front electrode external part 51, promotes thereon Temperature-sensitive element 10 reach preset temperature threshold value and melt, as shown in figure 4, propeller main body 3 is by the first stage clip 4a and anti-arc guard The elastic stress collective effect that second stage clip 4b is superimposed on 30, promotes the separation electrode being fixed in propeller main body 3 to accelerate Launch to the direction away from front electrode external part 51, final anti-arc guard 30 touch with muffler plate 11 and be obstructed it is static, it is completely exhausted Edge covers arc extinguishing platform 12, front electrode external part 51 and electrode connecting parts 7, forms the dielectric chamber of an autonomous closure；Propulsion Device main body 3 continues the elastic stress effect ejection by the first stage clip 4a, takes electrode front end 6a out of rapidly before electric arc is produced and disappears Outside arc plate 11.Final instruction device 32 stretches out indication window 2a, and the end of propeller main body 3 is made to the switch of remote signalling alarm device 40 It is into compressing and static, promote its on off state to change.A mechanical Indication of Losing Efficacy was so both completed, while and sending Go out the remote signalling signal of telecommunication of the surge protection device shielding failure.Now, shape between front electrode external part 51 and electrode front end 6a Into sufficient dielectric strength, the electrical connection separated between electrode and front electrode external part 51 is thoroughly completely cut off.

Another specific embodiment of the invention, if by separate the transient surges overvoltage of electrode, overcurrent or When short circuit current exceedes preset threshold value, fuse part 6b moment fusing vaporization thereon causes electrode front end 6a and electrode end 6c Separate, as shown in figure 5, the elastic stress that propeller main body 3 is superimposed by the second stage clip 4b on the first stage clip 4a and anti-arc guard 30 Collective effect, promotes the electrode end 6c being fixed in propeller main body 3 to accelerate to the direction away from front electrode external part 51 Ejection, final anti-arc guard 30 touch with muffler plate 11 and be obstructed it is static, it is completely insulated cover arc extinguishing platform 12, front electrode external part 51st, electrode connecting parts 7 and electrode front end 6a, form the dielectric chamber of an autonomous closure；Propeller main body 3 continues to receive first The elastic stress effect ejection of stage clip 4a, by electrode end 6c rapidly away from muffler plate 11 before electric arc is produced.It is final to indicate dress Put 32 and stretch out indication window 2a, the end of propeller main body 3 causes to oppress and static to the switch of remote signalling alarm device 40, promotes it On off state changes.A mechanical Indication of Losing Efficacy was so both completed, while and sending the surge protection device and protecting The remote signalling signal of telecommunication of shield failure.Now, the dielectric strength of abundance is formed between electrode front end 6a and electrode end 6c, is thoroughly prevented The electric arc that electrode front end 6a and electrode end 6c is produced in disjunction forms electrical breakdown.

Above-described embodiment is available to be familiar with person in the art to realize or using of the present utility model, be familiar with ability The personnel in domain can in the case of without departing from innovation and creation thought of the present utility model, above-described embodiment is made various modifications or Change, thus protection scope of the present invention is not limited by above-described embodiment, and should meet the wound that claims are mentioned The maximum magnitude of new property feature.

Claims (10)

1. a kind of surge protection device with high-performance anti-arc guard arc extinguishing, including the shell being made up of inner shell (1) and enclosing cover (2) Body, preventing arc propeller, voltage-sensitive component, thermal switch component and the electrode being at least made up of a voltage sensitive element are drawn Foot；It is characterized in that：Described inner shell (1) is provided with muffler plate (11) and arc extinguishing platform (12)；Described preventing arc propeller includes Anti-arc guard (30), propeller main body (3) and flexible member；Described thermal switch component includes temperature-sensitive element (10), front electrode External part (51), electrode connecting parts (7) and separation electrode；The separation electrode is by electrode front end (6a), fuse part (6b) and electricity Pole end (6c) is constituted；Described electrode lead-out pins include flexible conductor (20), first electrode leading foot and second electrode leading foot；

Its internal insulation forms two dielectric chambers, two described dielectric chambers when described inner shell (1) is engaged with enclosing cover (2) Respectively the first dielectric chamber (1a) and the second dielectric chamber (1b)；The muffler plate (11), arc extinguishing platform (12), preventing arc propulsion Device, thermal switch component and first electrode leading foot are located at the first dielectric chamber (1a)；The voltage-sensitive component and second electrode Leading foot is located at the second dielectric chamber (1b)；

Described electrode connecting parts (7) are fixed on arc extinguishing platform (12)；The voltage sensitive element tow sides are provided with metal electricity Pole piece, described front electrode external part (51) is located on one of metal electrode film, and another metal electrode film is provided with Backplate external part；The front electrode external part (51) reaches the first dielectric chamber (1a) by the second dielectric chamber (1b) It is interior, and smooth abut in electrode connecting parts (7)；The backplate external part is at the second dielectric chamber (1b)；When described When anti-arc guard (30) is touched with muffler plate (11), anti-arc guard (30) stretches out arc extinguishing platform (12), front electrode with muffler plate (11) End (51) and the completely insulated covering of electrode connecting parts (7).

2. a kind of surge protection device with high-performance anti-arc guard arc extinguishing according to claim 1, it is characterised in that：Institute Propeller main body (3) both sides stated are provided with wing arm (31)；It is provided with what is slided for wing arm (31) in first dielectric chamber (1a) Chute (13)；Described flexible member includes the first elastic component (4a) and the second elastic component (4b), and the first elastic component (4a) is arranged In chute (13), propeller main body (3) is biased by wing arm (31) by the first elastic component (4a)；Second elastic component (4b) One end is leaned against on inner shell (1), and the other end is leaned against on anti-arc guard (30), and anti-arc guard (30) is biased by the second elastic component (4b)；It is described Separation electrode be fixed in propeller main body (3) by electrode end (6c), electrode front end (6a) and fuse part (6b) are stretched out Propeller main body (3)；During the surge protection device normal work, thermal switch component is in closure state, the electrode front end (6a) muffler plate (11), electrode front end (6a) smooth electrode connecting parts for abutting in arc extinguishing platform (12) are passed through with fuse part (6b) (7) on, the front electrode external part (51), electrode front end (6a) and electrode connecting parts (7) are by the temperature-sensitive element (10) Melting welding constitutes electrical connection；The electrode end (6c) consists of with first electrode leading foot the inner (8b) flexible conductor (20) and is electrically connected Connect, constitute inner with second electrode leading foot of the backplate external part electrically connects；First electrode leading foot outer end (8a) and Stretch out two external pins of formation outside housing in second electrode leading foot outer end (9a).

3. a kind of surge protection device with high-performance anti-arc guard arc extinguishing according to claim 1, it is characterised in that：Institute The surge protection device with high-performance anti-arc guard arc extinguishing stated is additionally provided with the instruction for indicating the surge protection device working condition Device (32) and remote signalling alarm device (40)；Described instruction device (32) is arranged in propeller main body (3)；Described enclosing cover (2) it is provided with indication window (2a).

4. a kind of surge protection device with high-performance anti-arc guard arc extinguishing according to claim 1, it is characterised in that：Institute The arc extinguishing platform (12) stated is provided with the fixed slot (12a) of power pole connector (7).

5. a kind of surge protection device with high-performance anti-arc guard arc extinguishing according to claim 1, it is characterised in that：Institute The voltage sensitive element stated is varistor or discharge tube or discharging gap.

6. a kind of surge protection device with high-performance anti-arc guard arc extinguishing according to claim 2, it is characterised in that：Institute Spacing distance is provided between the muffler plate (11) stated and arc extinguishing platform (12), a clearance for insulation is formed.

7. a kind of surge protection device with high-performance anti-arc guard arc extinguishing according to claim 2, it is characterised in that：Institute The muffler plate (11) stated is provided with the through hole (11a) that power pole front end (6a) and fuse part (6b) are passed through.

8. a kind of surge protection device with high-performance anti-arc guard arc extinguishing according to claim 2, it is characterised in that：Institute During the surge protection device normal work stated, anti-arc guard (30) offsets with propeller main body (3), and anti-arc guard (30) is positioned at institute Before stating front electrode external part (51).

9. a kind of surge protection device with high-performance anti-arc guard arc extinguishing according to claim 1 and 2, its feature exists In：Described electrode connecting parts (7) are made up of tin plating alloy, and global shape is bending lamellar or rectangular block shape or square through-pipe Shape, and chamfering is additionally provided with right angle.

10. a kind of surge protection device with high-performance anti-arc guard arc extinguishing according to claim 1 and 2, its feature exists In：Described temperature-sensitive element (10) is meltable metal alloy solder or conducting polymer；Described fuse part (6b) is hot melt Disconnected body structure.