CN101047056A - Surge absorber - Google Patents

Surge absorber Download PDF

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Publication number
CN101047056A
CN101047056A CN 200710093632 CN200710093632A CN101047056A CN 101047056 A CN101047056 A CN 101047056A CN 200710093632 CN200710093632 CN 200710093632 CN 200710093632 A CN200710093632 A CN 200710093632A CN 101047056 A CN101047056 A CN 101047056A
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China
Prior art keywords
pair
surge absorber
electrode
projection electrode
terminal electrode
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Chinese (zh)
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社藤康弘
原田宏一郎
尾木刚
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Mitsubishi Materials Corp
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Mitsubishi Materials Corp
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Abstract

In a surge absorber, a pair of protrusion electrodes is fixed to a pair of terminal electrode members at positions shifted from the center of the terminal electrode members to be point-symmetrical with the center of a ceramic insulator tube and a distance between the protrusion electrodes is adjusted so as to obtain a desired discharge starting voltage. As a result, it is possible to easily change the distance between the discharge electrodes without changing the length of the discharge electrodes.

Description

Surge absorber
Technical field
The present invention relates to the various equipment that protection is impacted by abnormal voltage (surge voltage), with the accident employed surge absorber of preventing trouble before it happens.This surge absorber is used to for example various electronic equipments, or the surge countermeasure of all kinds of machines of electronic equipment or static countermeasure etc. are housed.
The application advocates priority for the patent application 2006-336882 of Japan number that files an application on December 14th, the patent application 2006-89955 of Japan number 1 of filing an application on March 29th, 2006 and filed an application on December 28th, 2006 the patent application 2006-356115 of Japan number, quotes its content here.
Background technology
The part that the electronic equipment of using at the communication equipment of telephone set, facsimile machine, modulator-demodulator etc. is connected with communication line, electronic equipment is connected to the part of power line, on the part of the electric shock that is subjected to antenna or CRT drive circuit etc. easily, produces by the surge voltage of lightning surge or static etc., destruction in order to prevent to be produced by the fire damage that causes the electronic equipment and the tellite of this equipment of lift-launch by abnormal voltage or on fire etc. is connected with surge absorber.
Follow the trend of the high-density installationization of recent electronic equipment etc., the discharge-type surge absorber of using at this order wire and power line also requires miniaturization and as surface mounting assembly, in order to satisfy such requirement, proposed both sides' enclosed electrode is formed small-sized surge absorber convex, surface-mountable (for example opening the 2005-63721 communique with reference to the spy).
In such surge absorber,, must make interelectrode variable in distance in order under the condition that does not change electrode material, sealing gas, sealing air pressure, to adjust discharge inception voltage.
But, in the surge absorber of above-mentioned document record,, the length of sparking electrode is changed in order to make interelectrode variable in distance, there is the problem on the manufacturing expenses such as at every turn will making metal pattern.
In addition, now, this surge absorber constitutes and be provided with the pair of discharge electrodes (spy opens flat 6-132065 communique) that keeps predetermined discharging gap and dispose in having the gas-tight container of specified volume.
Figure 15 represents the traditional surge absorber of an example.In this surge absorber S, on the base station 300 that constitutes by insulating material, connect with the interval that keeps being scheduled to and airtight shape pair of lead wires 301a, 301b are set.End at this right lead-in wire 301a, 301b, parallel sparking electrode 302a, the 302b that constitutes by iron (Fe), nickel (Ni), copper (Cu) or their alloy that be provided with, the gas-tight container 303 that insulating material by glass etc. constitutes is set on base station 300, makes it surround sparking electrode 302a, 302b.The discharge gas that filling is made up of the inert gas of argon (Ar) and nitrogen (N) etc. in this gas-tight container 303.
In having the surge absorber of said structure, lead-in wire 301a, 301b are connected between the circuit of protected equipment, for example between the circuit of electronic equipment.Then, in case when on this circuit, being applied in surge, between sparking electrode 302a, 302b, just form gas discharge, absorb surge and also protect this electronic equipment not to be subjected to surge impact.
But, in above-mentioned surge absorber S, be difficult to obtain stable discharge inception voltage, when being applied in the surge on pinnacle, discharge inception voltage rises, and the possibility as the function of surge absorber can not be fully finished in existence.
Summary of the invention
The objective of the invention is to, the surge absorber that can not change the length of sparking electrode and easily change the distance between sparking electrode is provided.
In addition, the present invention is the invention of doing in order to address the aforementioned drawbacks, and its purpose is, provides to obtain stable high-precision discharge inception voltage, correctly finishes the surge absorber as the function of surge absorber.
In order to solve above-mentioned problem, the invention provides following means.
Surge absorber of the present invention is provided with and the pair of terminal electrode member is located at two ends and at the insulating properties pipe of inner sealing sealing gas, fixing towards the opposing party's terminal electrode member and outstanding a pair of projection electrode on the inner surface of above-mentioned pair of terminal electrode member, it is characterized in that above-mentioned a pair of projection electrode is offset from position respect to one another.
Be configured to be offset as if a pair of projection electrode on the inner surface that is fixed on the pair of terminal electrode member from position respect to one another, make it at the inboard of insulating properties pipe and axially outstanding, then, then can under the situation that does not change projection electrode length, easily make the variable in distance between projection electrode by changing the distance of this skew.
In this surge absorber, the center that above-mentioned a pair of projection electrode preferably is configured in about above-mentioned insulating properties pipe becomes on the point-symmetric position.
At this moment, because the triggering gap that is formed between a pair of projection electrode is formed near the central authorities of insulating properties pipe, can make the discharge inception voltage stabilisation.
In this surge absorber, preferably equal half of distance between the above-mentioned pair of electrodes member from the top of above-mentioned a pair of projection electrode to the distance of cardinal extremity, perhaps below half.
If equal half of distance between the above-mentioned pair of electrodes member from the top of a pair of projection electrode to the distance of cardinal extremity, or below half, life characteristic is improved.
In this surge absorber, above-mentioned a pair of projection electrode is preferably formed as and is helical form.
If the shape of a pair of projection electrode is formed helical form, then owing to can be regarded as the length from the cardinal extremity of projection electrode to the top is strengthened, when projection electrode being fixed on the terminal electrode member, jointing material can prevent the characteristic variations of electrode material owing to surface tension effects is elevated to the top of projection electrode.
Moreover, in this surge absorber, by on the outer surface of above-mentioned projection electrode, forming the tunicle of argentiferous, response is increased substantially, particularly when adding the pinnacle surge, also can suppress the rising of discharge inception voltage, thereby can obtain stable discharge inception voltage.
In addition, also can fix above-mentioned projection electrode by riveted joint base end part in the hole on being formed on above-mentioned terminal electrode member.
If projection electrode adopts riveted joint firmly to be fixed on the terminal electrode member, then can not make the projection electrode bending owing to the thermal shock of reignition etc. with from the impact of vibration of outside etc., the projection electrode that is fixed can not come off from the terminal electrode member, can prevent the variation of arcing distance.
In addition, surge absorber of the present invention in gas-tight container, keeps predetermined distance and a pair of bar-shaped sparking electrode is set in parallel to each other, it is characterized in that above-mentioned pair of discharge electrodes comprises Ag or Ag alloy at least in the interior sideways material of facing across above-mentioned discharging gap.
In having the surge absorber of said structure, between the stable pair of discharge electrodes that comprises Ag or Ag alloy of discharge inception voltage, discharge and absorb surge.Thereby the starting voltage of its discharge is carried out in predetermined stability range.In addition, owing to between the side, discharge, can guarantee that its discharging surface spreads all over sparking electrode in the longitudinal direction largo, can carry out stable discharge at the interior of the bar-shaped sparking electrode that is parallel to each other.
In the surge absorber of the present invention, can be at least by interiorly guaranteeing broad machining area across what discharging gap was faced to the side at a pair of bar-shaped sparking electrode that is parallel to each other, simultaneously owing to comprise Ag or Ag alloy in the sideways material within it, the starting voltage of its discharge is carried out in stable scope, even when being applied in the surge on pinnacle, discharge inception voltage can not rise yet, and can correctly finish the function as surge absorber.
At this moment, also can adopt the interior of pair of discharge electrodes not only to the side, but the structure that all surfaces is made of Ag or Ag alloy.
When all surfaces is set as Ag or Ag alloy, pair of discharge electrodes integral body can be set as the structure that constitutes by Ag or Ag alloy, also can be set as the structure of the coating that constitutes by Ag or Ag alloy.
In having the surge absorber of these structures,, can carry out more stable discharge because the area of the broadness on surface constitutes with Ag or Ag alloy.
Description of drawings
Fig. 1 is the axial section of the surge absorber of expression first embodiment of the invention.
Fig. 2 is the axial section of the surge absorber of expression second embodiment of the invention.
Fig. 3 is half the axial section of surge absorber that the length of expression projection electrode equals the distance between the terminal electrode member.
Fig. 4 is the axial section of the surge absorber of expression third embodiment of the invention.
Fig. 5 is the oblique view of expression one routine projection electrode.
Fig. 6 is a longitudinal sectional drawing of representing the fixing means of projection electrode by process sequence.
Fig. 7 is a longitudinal sectional drawing of representing another fixing means of projection electrode by process sequence.
Fig. 8 is the axial section that is formed with the surge absorber of conductivity lining on the expression projection electrode.
Fig. 9 is formed with conductivity lining and the response voltage performance plot that does not form the conductivity lining on the expression projection electrode.
Figure 10 is the longitudinal sectional drawing of the surge absorber of expression fourth embodiment of the invention.
Figure 11 is the longitudinal sectional drawing of the surge absorber of fifth embodiment of the invention.
Figure 12 is the longitudinal sectional drawing of the surge absorber of sixth embodiment of the invention.
Figure 13 is the transverse cross-sectional view of sparking electrode of the embodiment of Figure 12.
Figure 14 is the response voltage performance plot of expression sparking electrode of the present invention and traditional sparking electrode.
Figure 15 is the longitudinal sectional drawing of traditional surge absorber.
Embodiment
With reference to Fig. 1, describe with regard to first embodiment of the invention.
The surge absorber 1 of present embodiment is to adopt the discharge-type surge absorber that triggers the gap.This surge absorber 1 is rectangular-shaped on the whole, is made of following part as shown in Figure 1: the terminal electrode member 2,3 of a pair of relative configuration; Terminal electrode member 2,3 is located at two ends and inner insulating ceramics insulated tube 4 with argon air seals such as (Ar); And the projection electrode 5,6 that on terminal electrode member 2,3, is provided with respectively.
Pair of terminal electrode member 2,3 is by as the Kovar of nickel (Ni), cobalt (Co), iron (Fe) alloy (KOVAR: registered trade mark) or as No. 42 alloys of the alloy of nickel (Ni) and iron (Fe) constitute, form rectangular flat board.
On the other hand, ceramic insulating tube 4 is by aluminium oxide (Al 2O 3) pottery that waits constitutes, periphery has the rectangular frame shape section consistent with the periphery of terminal electrode member 2,3.On the both ends of the surface of this ceramic insulating tube 4, be provided with the metal layer 7 of 2 layers of structure forming by manganese (Mo)-tungsten (W) alloy-layer and nickel (Ni) layer.Ceramic insulating tube 4 is on the end face that is provided with metal layer 7, and middle interval is sealed with the scolder 8 usefulness pair of terminal electrode members 2,3 of the frame shape that silver (Ag) copper (Cu) is, at the inner sealing argon gas of ceramic insulating tube 4.
On the inner surface of pair of terminal electrode member 2,3, its projection electrode 5,6 separately is with respect to a little skew of center of terminal electrode member 2,3, and, become point-symmetric position in ceramic insulating tube 4, to give prominence to along axle 101 directions of ceramic insulating tube 4 from center about ceramic insulating tube 4.The length of these projection electrodes 5,6 form than the distance between the pair of terminal electrode member 2,3 half is long slightly.In addition, projection electrode 5,6 is fixed on the terminal electrode member 2,3 with welding manner by titanium (Ti), nickel (Ni) or nickel (Ni) formations such as alloy with iron (Fe).And, be formed with between projection electrode 5 and the projection electrode 6 and trigger gap 51.
Below, just the manufacture method by the surge absorber of the present embodiment of above structure describes.
At first, form pair of terminal electrode member 2,3 and projection electrode 5,6.Then, the fixing projection electrode 5 of welding on the position that the central authorities apart from terminal electrode member 2 of terminal electrode member 2 are offset slightly.
In addition, the projection electrode 5 with respect to being fixed on the terminal electrode member 2 is fixed on projection electrode 6 on the terminal electrode member 3 with welding manner, and the center that the welding position is dropped on about ceramic insulating tube 4 becomes the point symmetry place.
Here, projection electrode 5 and projection electrode 6 are configured to obtain the such distance of desired discharge inception voltage.
Then, on the both ends of the surface of ceramic insulating tube 4, form manganese (Mo)-tungsten (W) alloy-layer and nickel (Ni) layer successively, form with so that itself and the metal layer 7 of the wettability raising of frame shape scolder 8.
Then, solid-state scolder 8 is set on the terminal electrode member 2 of having fixed projection electrode 5, ceramic insulating tube 4 is set on the periphery of terminal electrode member 2.Mounting scolder 8 above ceramic insulating tube 4 again, the fixing terminal electrode member 3 of projection electrode 6 of mounting above it is as interim assembling.
Under the state of so interim assembling, after fully vacuumizing, in sealing gas atmosphere, heat, the scolder 8 of fusing frame shape also seals, and quench cooled is made surge absorber 1 afterwards.
The outer surface of the pad that forms on tellite etc. and the pair of terminal electrode member 2,3 of surge absorber 1 carries out soldering to be fixed, and can use the surge absorber of making like this 1.
If on surge absorber 1, add surge voltage with this structure, then at first discharge by the triggering gap 51 of surge absorber 1, cause main discharge by argon (Ar) because of the discharge ionization on this triggering gap 51.Discharge surge voltage by this main discharge, can protect the electronic equipment that surge absorber 1 has been installed, do not suffer damage because of surge voltage.
According to this surge absorber 1,, also can make the variable in distance that triggers gap 51 by the position that change is fixed on a pair of projection electrode 5,6 on the pair of terminal electrode member 2,3 even do not change the length of a pair of projection electrode 5,6.Therefore, can under the state of identical electrodes material, sealing gas, sealing air pressure, change the starting voltage of discharge.
Then, describe with regard to the surge absorber 11 of second embodiment of the invention with reference to Fig. 2.Moreover, in the following description, having identical mark on the building block that in above-mentioned first embodiment, illustrated, it illustrates omission.
As shown in Figure 2, second embodiment and the above-mentioned first embodiment difference be, the length of a pair of projection electrode 5,6 forms shortlyer slightly than half of the distance between the pair of terminal electrode member 2,3.
According to this surge absorber 11, even owing to do not change the length of a pair of projection electrode 5,6, also can make the variable in distance that triggers gap 52, can obtain the effect same with first embodiment by changing the fixing position of pair of terminal electrode member portion member 2,3.In addition, by making this projection electrode 5 and projection electrode 6 approach the axle 101 of ceramic insulating tube, even under the situation of the distance that shortens the triggering gap 52 between a pair of projection electrode 5,6 terrifically, the possibility that the gravitation that produces between a pair of projection electrode 5,6 when also not having owing to discharge makes projection electrode 5 contact with projection electrode 6.
In first and second above-mentioned embodiment 1, the length that has formed a pair of projection electrode 5,6 is than longer than half of the distance of 2,3 of pair of terminal electrode members in surge absorber 1, in surge absorber 11, shorter than half of the distance of 2,3 of pair of terminal electrode members, and as shown in Figure 3, also can form half length of the distance that just is 2,3 of pair of terminal electrode members.Under the situation of surge absorber shown in Figure 3 21, even do not change the length of a pair of projection electrode 5,6, also can be fixed on position on the pair of terminal electrode member 2,3 by changing a pair of projection electrode 5,6, change the distance that triggers gap 53.In addition, even under the situation that has shortened the distance that triggers gap 53 terrifically, since reduced because of when discharge in the possibility that the gravitation of 5,6 generations of projection electrode of two sides makes projection electrode 5 contact with projection electrode 6, also can obtain the effect same with second embodiment.
Below, describe with regard to third embodiment of the invention with reference to Fig. 4.Moreover, in the following description, having identical mark on the building block that in above-mentioned first and second embodiment, illustrated, it illustrates omission.
The surge absorber 31 of the 3rd embodiment with above-mentioned first or the difference of second embodiment be that as shown in Figure 4, a pair of projection electrode forms helical form.
In this surge absorber 31, on the inner surface of pair of terminal electrode member 2,3, the fixing projection electrode 5,6 that stretches out towards the opposing party's terminal electrode member 3,2 helical forms makes them become point symmetry about the center of ceramic insulating tube 4.And the end of the end of projection electrode 5 and projection electrode 6 constitutes discharge part 32, forms to trigger gap 54 between this a pair of discharge part 32.
The surge absorber 31 of present embodiment is according to making with the same step of the surge absorber 1 of first embodiment.
Here, projection electrode 5 and projection electrode 6 are configured to make distance between separately the discharge part 32 to be configured to obtain the distance of desired discharge inception voltage.
According to this surge absorber 31, even do not change from the end of spiral helicine a pair of projection electrode 5,6 to the distance of base end part, also can be fixed on position on the terminal electrode member, make the variable in distance that triggers gap 54, can obtain the effect same with first embodiment by change.Moreover, according to this surge absorber 31, flow to the root of spiral helicine projection electrode 5,6 as scolder 8 grades of joint filling material, because the distance from the root of spiral helicine projection electrode 5,6 to discharge portion 32 is increased substantially, perhaps, scolder 8 is unlikely to owing to surface tension arrives to discharge portion 32, and the material that can prevent owing to discharge portion 32 changes the situation that discharge inception voltage is changed.
Moreover, in the above embodiment that illustrates, a pair of projection electrode 5,6 is fixed on the pair of terminal electrode member 2,3, make its center become point symmetry about ceramic insulating tube 4, and the point symmetry center of a pair of projection electrode 5,6 is not limited to the center of ceramic insulating tube 4, also can be on face, from the off-centring of ceramic insulating tube 4 perpendicular to center axle 101, that comprise ceramic insulating tube pipe 4.
In addition, it only is the column or the helical form of thin cylinder, prism etc. that a pair of projection electrode 5,6 does not limit, also can be the shape that triangle taper etc. sees that towards the top internal diameter of periphery reduces, have again, also can be to curve circle-shapedly with the metal plate made from punch process is circle-shaped, also can be shape shown in Figure 5.The formation of the projection electrode 41 shown in Fig. 5 is, the metallic plate of thin titanium (Ti) etc. is struck out the T font, the lateral part 42 that will be equivalent to the horizontal bar of T font curve circle-shaped after, the center position of the lateral part 42 of longitudinal component 43 after circle-shaped rounding that will be equivalent to the vertical rod of T font bends.At this moment, the employing end welding that will curve the lateral part 42 after circle-shaped is medium fixing and use at terminal electrode member 2 and terminal electrode member 3.In this projection electrode 41, owing to after stamped sheet metal, only can make projection electrode 41, come compared with column, taper or spiral helicine electrode with bending machining, can make projection electrode 41 at low cost.
In addition, in the above embodiment that illustrates, projection electrode 5,6 fixedly be to adopt welding in pair of terminal electrode member 2,3, but also be not limited to welding, also can be shown in the operation (a) as Fig. 6, on terminal electrode member 2,3 (terminal electrode member 3 shown in Figure 6), open aperture 71, shown in Fig. 6 (b), after the base end part of projection electrode 5,6 (projection electrode 6 shown in Figure 6) is pressed into above-mentioned hole 71, fix with scolder again.In addition, being pressed into of projection electrode 6 also can be shown in the operation (c) of Fig. 6, making it pass terminal electrode member 3 is pressed into, afterwards, shown in the operation (d) of Fig. 6, the end 72 of the projection electrode 6 that employing is passed from the direction punching press of terminal electrode member 3, be fixed on the terminal electrode member 3, perhaps, from the direction of terminal electrode member 3 end 72 of the projection electrode 6 that passes of punching press only, thereafter, shown in the operation (e) of Fig. 6, by punching press, make it with respect to 3 bendings of terminal electrode member, make terminal electrode member 3 and projection electrode 6 affixed and integrated.In this way, can be stably that terminal electrode member 3 and projection electrode 6 is more fixing.
Also have,, also can be clinching method shown in Figure 7 as the fixing method of projection electrode on terminal electrode member 2,3.That is, shown in the operation (a) of Fig. 7, in the hole 71 of terminal electrode member 2,3, be pressed into the base end part of projection electrode 5,6 (terminal electrode member 3 and projection electrode 6 only are shown) in Fig. 7 after, use the internal diameter tubular drift P bigger than projection electrode 6, around the hole 71 of stamped terminals electrode member 3, shown in the operation (b) of Fig. 7, drift P is entered in the terminal electrode member 3.By this drift of punching press P, since from its punching press position with the material of the terminal electrode member 3 of inboard to such as arrow the operation (b) of Fig. 7 shown in, direction extruding in radius and form the portion 73 that gathers, aperture with hole 71 dwindles on one side, shown in the operation (c) of Fig. 7, projection electrode 6 is fixed on the terminal electrode member 3 securely on one side.
Like this, if the riveted joint of projection electrode 5,6 usefulness is fixed on the terminal electrode member 2,3 securely, then projection electrode can not buckle owing to the thermal shock of reignition etc. with from the impact of vibration of outside etc., the projection electrode 5,6 that is fixed can not come off from terminal electrode member 2,3, can prevent the change of arcing distance.
The material of projection electrode also can be Fe, Cu, Mo, Mn, W, Ag, AI, Pd, Pt or its alloy more than 2 kinds except Ti, Ni, Fe-Ni alloy.In addition, on above-mentioned projection electrode surface, also can form SnO with sputter etc. 2, SiC, ITO, TiC, TiCN, BaAl 4Or the conductive cell envelope of above-mentioned metal or alloy.
At this moment, if use the metal of argentiferous (Ag) to form the outer surface of projection electrode, then can further improve response.
Fig. 8 is illustrated in the surge absorber that has formed on the outer surface of projection electrode behind the argentiferous conductive cell envelope.In this surge absorber 81, being formed on the conductive cell envelope 82 usefulness fixed insulation pipes 4 on the projection electrode 5,6 and the scolder 8 of terminal electrode member 2,3 constitutes, as this scolder 8, use silver (Ag)-copper (Cu) series solder, when making these scolder 8 fusings, by climbing by surface tension on the projection electrode 5,6, on the outer surface of this projection electrode 5,6, form conductivity lining 82.
When making this surge absorber 81, on terminal electrode member 2,3, be pressed into the base end part of projection electrode 5,6, projection electrode 5,6 is run through have and make this projection electrode 5,6 insert the solder sheet in logical holes (diagram slightly) and cover on terminal electrode member 2,3, then, dispose insulating properties pipe 4 above it, at the two ends of this insulating properties pipe 4, make solder sheet between the centre, configuration two-terminal electrode member 2,3.Then, they are heated under confined state, scolder 8 is in case fusing, just with fixing between insulating properties pipe 4 and the terminal electrode member 2,3, simultaneously, the scolder on terminal electrode member 2,3 surfaces since surface tension and on projection electrode 5,6 climbing and the outer surface of this projection electrode 5,6 that is covered, constitute conductivity lining 82.
For the response characteristic of surge absorber 81 that constitutes relatively like this and the surge absorber that does not have such conductivity lining 82, measured the response voltage (discharge inception voltage) when applying maximum and be 10KV and half the pulse voltage that applies this value with 50 microseconds with 1.2 microseconds.As shown in Figure 9, the response voltage of surge absorber that has conductivity lining as can be known is lower, and the fluctuation of response voltage is also little, and response characteristic is good.
Like this, cover, response is greatly improved, particularly when being applied in the surge on pinnacle, can suppress the rising of discharge inception voltage, obtain stable discharge inception voltage by the outer surface of projection electrode 5,6 being used the conductivity lining 82 of argentiferous.
Below, with the 4th embodiment of description of drawings surge absorber of the present invention.
Figure 10 is the longitudinal sectional drawing of the surge absorber of fourth embodiment of the invention.
This surge absorber S1 is on the base station 201 that is made of the electric insulating quality material, keep predetermined interval, airtight shape connects pair of lead wires 202a, the 202b that is provided with the lead formation that is waited by Dumet wire (copper lining iron-nickel alloy wire), simultaneously, top (upside among Figure 10) at each lead-in wire 202a, 202b, vacate the interval of discharging gap G, bar-shaped sparking electrode 203a, the 203b of material by the specific length of the Ag alloy of formations such as Ag (silver) or Ag (silver)-Cu (copper) is set in parallel to each other.Just in the surge absorber S1 of this embodiment, on the top of lead-in wire 202a, 202b, mend and meet and fix bar-shaped sparking electrode 203a, the 203b that constitutes by Ag or Ag alloy.
In addition, on base station 201,, make it surround sparking electrode 203a, 203b with the fixing gas-tight container 204 that constitutes by glass etc. of binding agent.Then, in the gas-tight container C that is surrounded with this gas-tight container member 204 and base station 201, the discharge gas (sealing gas) that filling is made of the inert gas of the rare gas of argon (Ar), neon (Ne), helium (He), xenon (Xe) etc. and nitrogen etc.
Have among the surge absorber S1 of said structure, lead-in wire 202a, 202b are connected between the circuit of protected equipment, for example between the circuit of electronic equipment.In case and be coupled with surge on the circuit, gas discharge just generates between sparking electrode 203a, 203b, absorbs surge and also protects this electronic equipment to avoid the impact of surge.This surge absorber S1, sparking electrode 203a, 203b form bar-shaped and are arranged parallel to each other configuration, owing to constitute the interior of configuration state be used as discharge face to side F, area with the comparison broadness on the length direction of sparking electrode 203a, 203b is guaranteed this discharge face, absorb surge owing between sparking electrode 203a, the 203b of this broadness area, discharge, can access stable discharge inception voltage.
And, when this gas discharge, because sparking electrode 203a, 203b are made of discharge inception voltage stable Ag or Ag alloy, its discharge inception voltage remains in the predetermined stability range, even when being added the surge on pinnacle, discharge inception voltage can not rise yet, and can correctly finish the function as surge absorber, can obtain more stable discharge inception voltage.And, even because reignition, between sparking electrode the surface of 203a, 203b some splash, also can obtain stable discharge inception voltage chronically.
Figure 11 is the longitudinal sectional drawing of the surge absorber of fifth embodiment of the invention.Among the figure, have identical mark on the parts identical with above-mentioned the 4th embodiment, its explanation is simple.
In this surge absorber S2, bar-shaped standard shaft 206a, 206b that sparking electrode 205a, the 205b that connects respectively on the top of pair of lead wires 202a, 202b has the specific length that is made of Fe, Ni, Cu or their alloy, and form coating 207a, the 207b that constitutes by Ag or Ag alloy on the whole at this standard shaft 206a, 206b.
At this moment, bar-shaped standard shaft 206a, 206b and lead-in wire 202a, 202b needn't be set separately, also can prolong lead-in wire 202a, 202b and be used as standard shaft.
Coat 207a, 207b to the Ag material of above-mentioned standard shaft 206a, 206b can easily form, and only need to electroplate Ag and get final product on standard shaft 206a, 206b.In addition, also can on the surface of standard shaft 206a, 206b, use printing process, or sputtering method forms.
In having the surge absorber S2 of said structure, because the outer surface of sparking electrode 205a, 205b is made of discharge inception voltage stable Ag or Ag alloy, carry out in the stability range of the starting voltage of its discharge in preset range, even when adding the surge on pinnacle, discharge inception voltage can not rise yet, and can correctly finish the function as surge absorber.In addition,, more stable discharge inception voltage can be obtained on sparking electrode 205a, 205b whole, stable discharge inception voltage can be obtained chronically with the area of broadness because coat 207a, the 207b of Ag are set.
Figure 12 and Figure 13 are the longitudinal sectional drawings of the surge absorber of sixth embodiment of the invention.
In this surge absorber S3, when sparking electrode 208a, 208b that the tip side of pair of lead wires 202a, 202b connects respectively have bar-shaped standard shaft 209a, the 209b of the specific length that is made of Fe, Ni, Cu or their alloy, in the outer surface of this standard shaft 209a, 209b, only at interior coat 210a, the 210b that constitutes by Ag or Ag alloy that on the F of side, form that also constitutes by discharging gap G configuration state.In this Figure 12 and example shown in Figure 13, on the side of the roughly hemicycle circumferential portion of sparking electrode 208a, 208b, form coat 210a, 210b.At this moment, in order to constitute standard shaft, also can prolong lead-in wire 202a, 202b and be used as bar-shaped standard shaft 209a, 209b.
In the surge absorber S3 that constitutes by said structure, in sparking electrode 208a, 208b, because the part that discharge is carried out is made of the stable Ag or the Ag alloy of discharge inception voltage, the starting voltage of its discharge is carried out in the stability range of preset range, even when adding the surge on pinnacle, discharge inception voltage can not rise yet, and can correctly finish the function as surge absorber.In addition,, and compare, can make at low cost with all situations of Ag material formation sparking electrode 208a, 208b because Ag that will high price only is coated in roughly semi-circumference part interior on the side of sparking electrode 208a, 208b.
Embodiment
For the surge absorber of above-mentioned the 4th embodiment, other metal beyond its flash-over characteristic and the Ag is compared, measure.
Figure 14 is the response voltage performance plot of expression when the material of sparking electrode is taken as Ag, Ni, Cu, Fe.As surge voltage, apply the pulse voltage that maximum is 10KV with 1.2 microseconds, and apply the pulse voltage that maximum is 5KV with 50 microseconds.With this moment discharge inception voltage in response voltage done measurement.Among Figure 14, show the response voltage of each material side by side.
As can be seen from Figure 14, the situation of the sparking electrode that is made of Ag of the present invention is come compared with the sparking electrode of other material, and response voltage (discharge voltage) is minimum, and its fluctuating range is also little, can obtain stable high-precision discharge inception voltage.
Moreover technical scope of the present invention is not limited to the scope of the foregoing description, in the scope that does not exceed purport of the present invention, all changes can be arranged.That is the present invention is not subject to above-mentioned explanation, only is subjected to the qualification of appended claim scope.
For example, the pair of terminal electrode member 2,3 among first~the 3rd embodiment also can be the alloy of Cu or Ni system.
In addition, the metal layer 7 of the both ends of the surface of ceramic insulating tube 4 also can be Ag, Cu, Au, Mo-Mn, in addition, and also can be without metal layer 7, and only use the scolder 8 that constitutes by reactive metal to seal.
In order to obtain desired electrical characteristic, can adjust the composition of sealing gas, for example, can be atmosphere (air), also can be Ar, N2, Ne, He, Xe, H 2, SF 6, C 2F 6, C 3F 8, CO 2Deng and their mist.
In addition, when on projection electrode, forming the conductivity lining, except the method that adopts above-mentioned scolder, also can adopt the method for plating, printing, sputter etc.
Also have, in the 4th~the 6th embodiment, for example, sparking electrode can be constituted with the Ag monomer, also can constitute, when constituting, can carry out more at low cost with the Ag alloy with the Ag alloy.In addition, not only in the occasion that constitutes itself with Ag or Ag alloy with sparking electrode, perhaps on the surface of sparking electrode, form the occasion of the coating of Ag or Ag alloy, for example, sparking electrode can be the metal that comprises Ag or Ag alloy, also can be by with other metal or the material that constitutes of the mixture of insulant etc.
In addition, in the various embodiments described above, as the structure that forms the gas-tight container of taking in sparking electrode with base station 201 and gas-tight container member 204, if and can parallel maintenance sparking electrode, then also the two ends fusing of margin of the cylindrical container that is made of glass infuser etc. can be melted the limit and shrink and constitute gas-tight container.

Claims (10)

1. surge absorber comprises that its two ends are provided with the pair of terminal electrode member and the inner insulating properties pipe of enclosing gas, wherein:
On the inner surface of described pair of terminal electrode member, be connected with towards the outstanding a pair of projection electrode of the opposing party's terminal electrode member,
Described a pair of projection electrode departs from position respect to one another and disposes.
2. surge absorber as claimed in claim 1, wherein: the center that described a pair of projection electrode is configured in about described insulating properties pipe becomes on the point-symmetric position.
3. surge absorber as claimed in claim 1, wherein: equal half of distance between the described pair of terminal electrode member from the top of described a pair of projection electrode to the distance of cardinal extremity, or less than half.
4. surge absorber as claimed in claim 1, wherein: described projection electrode forms helical form.
5. surge absorber as claimed in claim 1, wherein: the tunicle that is formed with argentiferous on the outer surface of described projection electrode.
6. surge absorber as claimed in claim 1, wherein: the base end part of described projection electrode is by in the hole of riveted and fixed on being formed at described terminal electrode member.
7. a surge absorber keeps predetermined discharging gap and is provided with a pair of bar-shaped sparking electrode in parallel to each other in airtight container, wherein:
Described pair of discharge electrodes comprise silver or silver alloy in opposed facing in the sideways material across described discharging gap at least.
8. surge absorber as claimed in claim 7, wherein: the whole surface of described pair of discharge electrodes is made of silver or silver alloy.
9. surge absorber as claimed in claim 7, wherein: described pair of discharge electrodes is made of silver or silver alloy.
10. surge absorber as claimed in claim 7, wherein: described pair of discharge electrodes is provided with the coat that is made of silver or silver alloy.
CN 200710093632 2006-03-29 2007-03-28 Surge absorber Pending CN101047056A (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2006089955 2006-03-29
JP2006089955 2006-03-29
JP2006336882 2006-12-14
JP2006356115 2006-12-28

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102282733B (en) * 2009-01-24 2014-08-13 三菱综合材料株式会社 Surge absorber
CN104578037A (en) * 2015-01-29 2015-04-29 吴传涛 DC (direct current) automatic load box high-voltage discharge element
CN106468748A (en) * 2016-09-22 2017-03-01 国网山东省电力公司经济技术研究院 A kind of method for equalizing voltage of transformer station main grounding grid

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102282733B (en) * 2009-01-24 2014-08-13 三菱综合材料株式会社 Surge absorber
CN104578037A (en) * 2015-01-29 2015-04-29 吴传涛 DC (direct current) automatic load box high-voltage discharge element
CN106468748A (en) * 2016-09-22 2017-03-01 国网山东省电力公司经济技术研究院 A kind of method for equalizing voltage of transformer station main grounding grid
CN106468748B (en) * 2016-09-22 2019-01-18 国网山东省电力公司经济技术研究院 A kind of method for equalizing voltage of substation's main grounding grid

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Application publication date: 20071003