CN1082256A - Lightning arrester has the thermal overload mechanism of emergency protection ability - Google Patents

Lightning arrester has the thermal overload mechanism of emergency protection ability Download PDF

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Publication number
CN1082256A
CN1082256A CN93107663A CN93107663A CN1082256A CN 1082256 A CN1082256 A CN 1082256A CN 93107663 A CN93107663 A CN 93107663A CN 93107663 A CN93107663 A CN 93107663A CN 1082256 A CN1082256 A CN 1082256A
Authority
CN
China
Prior art keywords
solder
solder bar
lightning arrester
shell
slotware
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
Application number
CN93107663A
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Chinese (zh)
Inventor
W·J·柯利
K·A·杰苏普
J·S·穆兰尼
C·A·迪包特
K·J·芬恩
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Raychem Corp
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Raychem Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Raychem Corp filed Critical Raychem Corp
Publication of CN1082256A publication Critical patent/CN1082256A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H39/00—Switching devices actuated by an explosion produced within the device and initiated by an electric current
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M3/00—Automatic or semi-automatic exchanges
    • H04M3/18—Automatic or semi-automatic exchanges with means for reducing interference or noise; with means for reducing effects due to line faults with means for protecting lines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R13/00—Details of coupling devices of the kinds covered by groups H01R12/70 or H01R24/00 - H01R33/00
    • H01R13/46—Bases; Cases
    • H01R13/52—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
    • H01R13/5216—Dustproof, splashproof, drip-proof, waterproof, or flameproof cases characterised by the sealing material, e.g. gels or resins
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01R—ELECTRICALLY-CONDUCTIVE CONNECTIONS; STRUCTURAL ASSOCIATIONS OF A PLURALITY OF MUTUALLY-INSULATED ELECTRICAL CONNECTING ELEMENTS; COUPLING DEVICES; CURRENT COLLECTORS
    • H01R4/00—Electrically-conductive connections between two or more conductive members in direct contact, i.e. touching one another; Means for effecting or maintaining such contact; Electrically-conductive connections having two or more spaced connecting locations for conductors and using contact members penetrating insulation
    • H01R4/24—Connections using contact members penetrating or cutting insulation or cable strands
    • H01R4/2416—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type
    • H01R4/242—Connections using contact members penetrating or cutting insulation or cable strands the contact members having insulation-cutting edges, e.g. of tuning fork type the contact members being plates having a single slot
    • H01R4/2425—Flat plates, e.g. multi-layered flat plates
    • H01R4/2429—Flat plates, e.g. multi-layered flat plates mounted in an insulating base
    • H01R4/2433—Flat plates, e.g. multi-layered flat plates mounted in an insulating base one part of the base being movable to push the cable into the slot
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01T—SPARK GAPS; OVERVOLTAGE ARRESTERS USING SPARK GAPS; SPARKING PLUGS; CORONA DEVICES; GENERATING IONS TO BE INTRODUCED INTO NON-ENCLOSED GASES
    • H01T1/00—Details of spark gaps
    • H01T1/14—Means structurally associated with spark gap for protecting it against overload or for disconnecting it in case of failure
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/02—Constructional details
    • H04Q1/028—Subscriber network interface devices

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Signal Processing (AREA)
  • Fuses (AREA)
  • Emergency Protection Circuit Devices (AREA)
  • Thermistors And Varistors (AREA)

Abstract

Skew engages with the ground electrode of lightning arrester thereby a spring member and connected slotware make the solder bar.During the fusing of solder response thermal overload situation, the solder that slotware impels the solder bar along a channel flow, forms low-resistance short circuit in the mode of the best between each electrode.Welding agent is the good colophony type welding agent of insulation property preferably, and it promotes the flow process of solder toward desired position.

Description

Lightning arrester has the thermal overload mechanism of emergency protection ability
The present invention relates to prevent the lightning arrester (surge arrestor) that telecommunications and other electronic equipment are damaged because of thunderbolt, power transmission line intersection etc.More particularly, the present invention relates to a kind of of lightning arrester through improved thermal overload mechanism with emergency protection ability.
Lightning arrester is that everybody is familiar with in the technical field of telecommunications and relevant electronics, and it has a tubular shell usually, is spaced a distance along the length direction of shell and disposes ground electrode and one or two line electrode.When lightning arrester was in the situation of current rush for a long time because of for example power transmission line intersects, the heat that it produced may be enough to cause fire.For preventing this situation, always advise when the lightning arrester thermal overload ground electrode and line electrode short circuit.The device that short circuit adopts usually is under normal circumstances to use solder (solder) or other meltability material to remain on the spring of fixed position.When thermal overload takes place, the meltability material melts, spring just can move on to the position that can effectively cause short circuit.Meltability material in the lightning arrester of above-mentioned prior art itself does not form short circuit.But United States Patent (USP) 4,851,946 disclosed dissimilar thermal overload mechanisms with emergency protection ability, its meltability solder just directly make between grounding electrode and the line electrode when the lightning arrester thermal overload and form short circuit.
The present invention has in the thermal overload mechanism of emergency protection ability and the above-mentioned existing patent disclosed similar, the fusing and the direct solder of the desired short circuit of formation when its adopts lightning arrester thermal overload.This fail safety mechanism work is very reliable, and relatively more cheap.In a most preferred embodiment, fail safety mechanism comprises the welding agent (solder flux) that is placed on the lightning arrester outer surface of outer cover, cover the solder bar (billet) on the lightning arrester shell and overlay on the solder bar and the solder bar is displaced to is close to and preferably leans against spring part on the lightning arrester body.Welding agent also can be located on the inner surface and/or outer surface of solder bar.Comparatively ideal welding agent is, and to be main component with rosin under normal (when being without thermal overload) situation play cleaning and protective effect, dielectric property are good and play that of insulator effect a kind of to its appended surface.When solder melts under the thermal overload situation, welding agent impels the surface of thorough wetting lightning arrester shell of the solder of fusion and fail safety mechanism slotware, thereby the solder of being convenient to fusion flows to one or more positions that form highly conductive, low resistance short circuit between each electrode of lightning arrester that make with best form from the solder bar.When the lightning arrester shell was cylindrical as usual, slotware was preferably got that common a kind of V font structure, and its first and second part is extended each other in certain angle, merged in to cover lightning arrester shell central axis and be parallel to usually on the vallum that this axis extends.During the lightning arrester thermal overload, the solder that slotware makes fusion flow from the solder bar along first direction more freely (for embodiment first direction be parallel to the longitudinal axis of lightning arrester shell usually), the solder that limits fusion simultaneously flows along horizontal second direction.
Remove outside the above-mentioned United States Patent (USP) 4,851,946, following United States Patent (USP) also is closely-related with the present invention: 5,029,302,4,912,592,4,603,368,5,027,100,4,405,967,4,158,869,4,402,031,4,380,036,4,321,649,4,212,047 and 4,062,054.
From following just the present invention for the explanation that embodiment did can know and understand other characteristics of the present invention that this explanation should be consulted in conjunction with the accompanying drawings.In the accompanying drawing:
Fig. 1 is the parts orthogonal decomposition perspective view of the lightning arrester of the thermal overload mechanism of the present invention with emergency protection ability;
Fig. 2 is lightning arrester and the end-view of overload each assembly of mechanism under situation about assembling;
Fig. 3 is the end view of lightning arrester;
Fig. 4 is the plan view from above of Fig. 2 assembly parts, has been shown in broken lines the solder bar that the line electrode at its two ends and lightning arrester shell two ends is spaced a distance;
Fig. 5 and Fig. 4 are similar, and two ends shown in broken lines extend to the solder bar of each electrode of lightning arrester body two ends;
Fig. 6 is the solder bar of lightning arrester shell and fail safety mechanism and the fragment end-view that covers slotware thereon;
Fig. 7 and Fig. 6 are similar, but show the position that each assembly is got in the thermal overload process;
Fig. 8 and Fig. 6 are similar, show the gel of sealing lightning arrester or all assemblies of other protective seal material and fail safety mechanism.
The example of the lightning arrester 10 shown in the accompanying drawing is those known a kind of lightning arresters, there is discoidal line electrode 14 at the two ends of its cylindrical housing 12, the interposition of outer cover length is equipped with discoidal ground electrode 16, and the interposition between electrode 16 and each line electrode 14 is equipped with insulating material 17.Lightning arrester 10 can and for example can also have the lead elements and production method thereof 18 of some pins types to extend from corresponding each electrode downwards.At least some of shell 12 and this for embodiment in all be covered with film, thin slice or the coating that welding agent material 20 is formed on the outer surfaces basically, represent with putting a picture among the figure.Welding agent material 20 preferably is that of main component is a kind of with rosin; dielectric property are strong under the normal temperature of shell 12; thereby protecting sheathing and other employed member avoid polluting, and also can be other material of sealant (for example gel, oil, grease an etc.) class of the sort of quality softness as shown in Figure 8.Under the thermal overload situation, welding agent greatly facilitates solder the flowing along shell and employed other member of fusion.Above-mentioned the sort of welding agent is that the M.W.Dunton Co. of Providence of a company in U.S. Luo Deai Lanzhou sells, and brand name is ELECTRO-ROSIN RA50, and main component is natural rosin, alcohol and patent activator.
Flute profile solder bar 22 is covered with the upper surface of shell 12, and extends along this surface longitudinal.Here the example of for solder bar 22 is the V font structure of reversing, the each several part at its two ends each other at an angle the vallum 24 from the solder bar upper surface extend downwards.Its outline line of the basal surface of solder bar preferably and here for example also be recessed, complement each other with the cylindrical outer surface of shell 12, can apply the film of forming with welding agent 20 on it or be coated with room 20-1.The thickness of solder bar 22 is maximum with the part under the vallum 24, and the part of adjoining solder bar both side edges is less.The upper surface of solder bar has a hemispherical projections 26, and this projection can apply thin slice, film or coating 20-2 that welding agent 20 is formed usually at the center of upper surface on the upper surface.
The basal surface of thermal overload mechanism conduction slotware 28 also can or apply welding agent 20-2 simultaneously.In order to cooperate with solder bar 22, the structure of member 28 is preferably got common groove shape V font, and the two side portions of member 28 tightly rests above the two side portions of solder bar 22.Hemisphere recess 30 is in the center of member 28 upper surfaces, and solder bar projection 26 can be seated in wherein, and the solder bar is moved with limitation with respect to plate 28 and lightning arrester shell 12.
Above-mentioned each assembly of Fig. 1 is fixed to one another and be fixed on the lightning arrester shell 12 with the elastomeric spring member that takes the shape of the letter U usually 32.Spring 32 common horizontally extending upper arm 34 and underarm 36 extend in parallel from common vertically extending part 38 each other.Arm 34,36 has in vertical direction in line eyelet 40,42 adjoining its external freedom end place.The eyelet 42 that a middle conductive base pin 18 passes on lightning arrester shell 12 arms 36 extends downwards.The eyelet 40 of upper spring arm 34 receives the projection 30 that embeds slotware 28 wherein, and can do conditional mobile with respect to lightning arrester shell 12 and spring 32 when making following solder bar 22 adjusting positions of plate 30 and its.Spring 32 affacts the spring force that assembles on each assembly makes member 28 and solder bar 22 offset downward a position, and solder bar 22 firmly is seated in the upper surface of lightning arrester 12 there.
Can be clear that from Fig. 4-6 both side edges of member 28 is preferably stretched out outside the both side edges of solder bar 22 below, the both ends part of member 28 is preferably stretched out outside solder bar 22 two ends and lightning arrester shell 12 two ends.In the embodiment of Fig. 5, the mid portion of solder bar 22 overlays on the ground electrode 16 of lightning arrester 10, and the both ends part of solder bar 22 overlays on the lightning arrester shell 12 corresponding line electrodes that adjoining 14.
The embodiment of Fig. 4 and the difference of Fig. 5 mainly be, the two ends of solder bar 22 each several parts be not overlay on the electrode 14 but in the axial direction with electrode 14 segment distance of being separated by.Therefore, although the welding agent that adopts among Fig. 4 embodiment can be above-mentioned the sort of welding agent 20, can adopt among Fig. 5 embodiment and not have other welding agent of welding agent 20 the sort of electrical insulation capabilities.
When the lightning arrester 10 of Fig. 4 is in the thermal overload state, 22 fusings of solder bar, so the solder of solder bar fusion axially also flows on other direction simultaneously along the outer surface of lightning arrester shell 12, engage with line electrode 14, thereby make between each this class electrode and the ground electrode 16 that is in below the solder bar the intensive and short circuit of highly conductive of formation.When welding agent is that of shell 12 of the comparatively ideal thorough wetting lightning arrester 10 of solder that can make fusion when a kind of, the solder of fusion not only can flow to the annular surface of electrode, and can flow to the outer end face of line electrode 14.No matter how lightning arrester shell 12 is orientated, and this phenomenon always takes place usually.
Slotware 28 structure that is in the shape of the letter V usually, this has promoted the axial flow process of molten solder from solder bar 22.As shown in Figure 6, the both side edges of member 28 is preferably stretched out outside the both side edges of solder bar 22, and is in the cylindrical surface top of following lightning arrester shell 12 usually, with this spaced surface one segment distance.Solder bar 22 response thermal overload situations and when melting, the solder of fusion begins to flow through from the two ends and the both sides of solder bar and slotware 28.Solder begins to flow from this of solder bar, adds spring 32 and affacts the power that offsets downward on the member 28, and impels plate 28 to descend, till the surface engagement of its both side edges part and following lightning arrester shell 12.This joint is exactly that the solder that has limited fusion flows through below member 28 both side edges part if not having stoped fully, thereby the solder that impels fusion flows to electrode 14 with the central axis that the two ends of mode cavitys below top cover 28 of the best are parallel to lightning arrester shell 12.
For embodiment in, welding agent 20 is to be located at lightning arrester shell 12 basically on the whole outer surface, but welding agent also can be banded or other form only be applied on the local surfaces at solder circulation place on the shell.
Welding agent also can not separated laying and does as a whole laying with the solder of solder bar 22.
So far, be introduced and illustrate with regard to most preferred embodiments more of the present invention, but these only are for example, rather than limitation of the present invention, scope of the present invention is consistent with following claims.

Claims (12)

1, a kind of thermal overload mechanism with emergency protection ability of the lightning arrester of band shell is characterized in that it comprises:
A ground electrode and at least one line electrode are positioned on the described shell, described each electrode each interval one segment distance configuration;
Welding agent and solder bar are placed on the described shell;
Described solder bar is in the fusing of following time of thermal overload situation at described lightning arrester, forms short circuit thereby make between described each electrode.
2, mechanism as claimed in claim 1 is characterized in that, when described lightning arrester was in the normal heat state, described welding agent made described solder bar and described each electrode insulation.
3, mechanism as claimed in claim 1 is characterized in that, is in thermal overload situation following time, and described welding agent is convenient to molten solder and is flow to a minimum position of causing described short circuit from described solder bar.
4, mechanism as claimed in claim 3 is characterized in that, described solder body has an inner surface and the outer surface on described inner surface opposite facing to described shell, and the described welding agent of part is on the described inner surface of described solder bar.
5, mechanism as claimed in claim 4 is characterized in that, the described welding agent of part is on the described outer surface of described solder bar.
6, mechanism as claimed in claim 1 is characterized in that, it also comprises described solder bar is attached to erecting device on the described shell.
7, mechanism as claimed in claim 6 is characterized in that, described erecting device has an elastomeric spring member to be connected with described shell and described solder bar is displaced to adjoin a position of described shell.
8, mechanism as claimed in claim 7 is characterized in that, described erecting device also comprises a slotware, and this slotware is contained on the described spring member, and overlays on the described solder bar.
9, mechanism as claimed in claim 8 is characterized in that, it also comprises jockey, and this jockey is on described plate and described solder body, so that can relatively move between described solder bar and described slotware when regulating.
10, mechanism as claimed in claim 1 is characterized in that, described solder bar is got the V font structure of reversing usually, and has lateral border.
11, mechanism as claimed in claim 10 is characterized in that, described slotware is the V font structure of reversing usually, and the segment distance of being separated by outside the described lateral border of its outer rim and described solder bar.
12, mechanism as claimed in claim 10 is characterized in that, the described lateral border of described slotware engages with described shell all the time, and described joint impels the solder of fusion to circulate under described slotware two ends from described solder body in the best way.
CN93107663A 1992-06-30 1993-06-30 Lightning arrester has the thermal overload mechanism of emergency protection ability Pending CN1082256A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US90695292A 1992-06-30 1992-06-30
US906,952 1992-06-30

Publications (1)

Publication Number Publication Date
CN1082256A true CN1082256A (en) 1994-02-16

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CN93107663A Pending CN1082256A (en) 1992-06-30 1993-06-30 Lightning arrester has the thermal overload mechanism of emergency protection ability

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EP (1) EP0648372A1 (en)
JP (1) JPH07508397A (en)
KR (1) KR950702334A (en)
CN (1) CN1082256A (en)
AU (1) AU4770293A (en)
BR (1) BR9306641A (en)
CA (1) CA2139327A1 (en)
MX (1) MX9303916A (en)
WO (1) WO1994000864A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5508675A (en) * 1994-03-18 1996-04-16 Tii Industries Inc. Miniature gas tube assembly with back-up air gap
DE102008062491A1 (en) * 2008-12-16 2010-06-17 Epcos Ag Surge arrester with a short-circuit device

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2622047B1 (en) * 1987-10-16 1990-03-02 Tubes Lampes Electriq Cie Indl SURGE PROTECTION DEVICE COMPRISING AT LEAST ONE FUSE ELEMENT
CH684036A5 (en) * 1991-07-26 1994-06-30 Cerberus Ag Electrical overload protection unit

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Publication number Publication date
EP0648372A1 (en) 1995-04-19
MX9303916A (en) 1994-04-29
AU4770293A (en) 1994-01-24
BR9306641A (en) 1998-12-08
KR950702334A (en) 1995-06-19
WO1994000864A1 (en) 1994-01-06
EP0648372A4 (en) 1995-02-02
JPH07508397A (en) 1995-09-14
CA2139327A1 (en) 1994-01-06

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