CN106057387A - Drop type lightning arrester - Google Patents

Abstract

The invention relates to a drop type lightning arrester. The drop type lightning arrester comprises an insulator, a rainproof cap, a conductive component, a drop device and a lightning arrester body. The drop device comprises first and second conductive seats, the first conductive seat is provided with an arc guide groove, and the second conductive seat is provided with a guide projection. When the lightning arrester body is at a topmost position, the upper end of the lightning arrester body is in clamped connection with a clamping groove of the conductive component; when the lightning arrester body rotates to a lowermost position, the guide projection slides out of the arc guide groove to allow a hang rod of the second conductive seat to separate from a hook groove of the first conductive seat; when the lightning arrester body rotates between the topmost position and the lowermost position, the guide projection is constantly positioned in the arc guide groove to prevent the hang rod of the second conductive seat from separating from the hook groove of the first conductive seat. The drop type lightning arrester is capable of effectively preventing human or article damages caused by accidental falling of the lightning arrester body.

Description

Drop-type arrester

Technical field

The present invention relates to a kind of drop-type arrester.

Background technology

The technology design of drop-type arrester is mostly derived from external, but occurs in that during its utilization at home and ask Topic.In detail, the spark gap main body of existing drop-type arrester is prone to depart from insulation on one's own initiative in damaging falling process Son (i.e. being departed from hook and slot by peg), owing to the position of spark gap is higher, the spark gap main body therefore departing from insulator is easy People or thing is injured by a crashing object when dropping.

Summary of the invention

Based on the problems referred to above, it is an object of the invention to provide a kind of drop-type arrester, it can ensure that thunder device main body exists Damage in falling process and depart from insulator the most on one's own initiative, thus avoid spark gap main body to inadvertently fall off and injure people or thing by a crashing object.

The invention provides a kind of drop-type arrester, comprising: insulator；Rainhat, its left end and described insulator Upper end be connected, in described rainhat, be provided with the conductive member of band draw-in groove；Fall device, including band hook and slot the first conductive seat and With the second conductive seat of peg, described first conductive seat is connected with the lower end of described insulator, sets on described first conductive seat There is arc guide groove, and be provided with, on described second conductive seat, the guide protrusions matched with described arc guide groove；With described The spark gap main body that second conductive seat is connected, described spark gap main body is hung on described first by the peg of described second conductive seat In the hook and slot of conductive seat so that described spark gap main body can carry out rotation up and down relative to described insulator.Its In, when described spark gap main body is positioned at extreme higher position, the upper end of described spark gap main body and the draw-in groove phase of described conductive member Clamping；When described spark gap body rotation is to extreme lower position, described guide protrusions skids off described arc guide groove, to allow State in the hook and slot of peg described first conductive seat of disengaging of the second conductive seat；When described spark gap main body in extreme higher position with minimum When position between position rotates, described guide protrusions is always positioned in described arc guide groove, to stop described second conduction The peg of seat departs from the hook and slot of described first conductive seat.

Further, described arc guide groove has for guiding described guide protrusions to slip into drawing of described arc guide groove Guiding incline.

Further, described guide protrusions be shaped as cylindric.

Further, described guide protrusions be shaped as hemispherical.

Further, this drop-type arrester also includes detecting system and dust cleaning system.Described detecting system includes: Non-contact current sensor, is set on the wire between described spark gap main body and the earth；There is the shell of PCB Body；It is arranged on the signal amplification circuit in described PCB, A/D modular converter, logic controller and alarm；Wherein, institute State non-contact current sensor, signal amplification circuit, A/D modular converter and logic controller to be sequentially connected electrically, described logic Controller, after detecting the Leakage Current of spark gap, controls alarm and sends alarm；Described dust cleaning system includes first Dust stratification detection device, the second dust stratification detection device, exhaust outlet and dust blow device, described dust blow device includes being swept into Device of air, described in be swept at the air inlet of device of air defecator be set, described in be swept into device of air and be arranged at PCB circuit The cleaning pipeline connection of the component installed surface side of plate, described cleaning pipeline is positioned at above described component, and right The position answering heater element is provided with self adaptation gas outlet, arranges multi-disc sector bimetallic at each described self adaptation gas outlet Sheet, time below deformation temperature, the described multi-disc mutually adjacent composition of sector bimetal leaf is discoid, thus described self adaptation is gone out QI KOU is closed, and higher than during deformation temperature, described bimetal leaf bends to described self adaptation gas outlet lateral direction, by described adaptive Answer gas outlet to open, and when the temperature of described bimetal leaf is the highest, the amplitude that described self adaptation gas outlet is opened is the biggest.Institute State the first dust stratification detection device and include the first capacitometer for measuring cell fin capacitance and comparator, described unit Part fin is made up of multiple fin monomers, electric insulation between multiple fin monomers, and described first capacitometer is to dissipating Electric capacity between backing monomer detects, and when comparator judges to measure capacitance less than threshold value electric capacity, startup is swept into Device of air, blows out via the self adaptation gas outlet on described cleaning pipeline through filtered air, carries out described component Clean.It is anti-that second dust stratification detection device described in exhaust outlet includes that light-beam generator and at least one are arranged in PCB Penetrating minute surface, this light-beam generator is arranged in described actuator housing internal side wall, and light-beam generator will be straight with fixing angle Line beam is transmitted into described mirror surface, and after described mirror surface reflects, light beam is projected onto and is positioned at inside actuator housing Photosensitive switch on sidewall, photosensitive switch remains on after receiving light beam；When the dust stratification on mirror surface reaches predetermined During thickness, photosensitive switch sensing is less than reflection light, then photosensitive switch Guan Bi, startup is swept into device of air automatically.This first amass When any one startup in ash detection device and the second dust stratification detection device is swept into device of air, this is swept into device of air and opens Dynamic, after the scheduled time, this is swept into device of air and is automatically switched off.

Further, described light-beam generator is laser generator.

Further, described light-beam generator includes LED and concave mirror, and light is projected described recessed by described LED On the mirror of face, and by sending directional light after concave mirror.

Further, described fin monomer is arranged on an insulating thermal conductor, between each described fin monomer Bearing of trend along diffusion sheet is split, or, along circular dividing between each described fin monomer.

Further, the quantity of the fan-shaped bimetal leaf at each described self adaptation gas outlet is 3-10 sheet, described double Sheet metal includes that active layers and passive layer, described active layers are manganin manganin alloy, and passive layer is dilval.

Further, described exhaust outlet be arranged on described actuator housing farthest away from the described position being swept into device of air Put place.

The drop-type arrester of the present invention is by the arc guide groove being fitted to each other and guide protrusions, it is ensured that Lei Qizhu Body departs from insulator in damaging falling process the most on one's own initiative, thus avoids spark gap main body to inadvertently fall off and injure people or thing by a crashing object.

The simple in construction of the drop-type arrester of the present invention, easily manufactured, safe and reliable, it is simple to practice and extension should With.

Accompanying drawing explanation

Hereinafter based on embodiment reference accompanying drawing, the present invention will be described in more detail.Wherein:

Fig. 1 is the structural representation of the drop-type arrester according to embodiments of the invention one；

Fig. 2 is the partial sectional view of the first conductive seat of the drop-type arrester according to the embodiment of the present invention one；

Fig. 3 is the structural representation of the second conductive seat of the drop-type arrester according to the embodiment of the present invention one；

Fig. 4 is detecting system and the dust cleaning system of the drop-type arrester of the embodiment of the present invention two；

Fig. 5 is the detecting system circuit diagram of the drop-type arrester of the embodiment of the present invention two；

Fig. 6 is the partial view to self adaptation gas outlet in embodiment two；

Fig. 7 is the partial view of the element radiating sheet in embodiment two；

Fig. 8 is the partial top view of the element radiating sheet in embodiment three；And

Fig. 9 is the structural representation of embodiment four.

The most identical parts use identical reference.Accompanying drawing might not be drawn according to actual ratio.

Detailed description of the invention

Below in conjunction with the accompanying drawings embodiments of the invention are illustrated.

Fig. 1 is the structural representation of the drop-type arrester according to embodiments of the invention one；Fig. 2 is real according to the present invention Execute the partial sectional view of the first conductive seat of the drop-type arrester of example one；Fig. 3 is the drop type according to the embodiment of the present invention one The structural representation of the second conductive seat of spark gap.As shown in Fig. 1 to Fig. 3, this drop-type arrester 100 includes insulator 101. This insulator 101 is preferably ceramic insulator or composite insulator.This insulator 101 can be installed by the with holes 101a at middle part On electric pole or other positions to be installed.

This drop-type arrester 100 also includes rainhat 103.The upper end phase of the left end of rainhat 103 and insulator 101 Connect, and in rainhat 103, be provided with the conductive member 106 of band draw-in groove.This drop-type arrester 100 also includes falling device 104.Should Fall device 104 and include the first conductive seat 104a of band hook and slot 1401 and the second conductive seat 104b of band peg 1402.Wherein, described Hook and slot 1401 and peg 1402 belong to well known to those skilled in the art, are not described in detail at this.First conductive seat 104a with The lower end of insulator 101 is connected, and is provided with arc guide groove 104c, sets on the second conductive seat 104b on the first conductive seat 104a There is guide protrusions 104d matched with arc guide groove 104c.

This drop-type arrester 100 also includes the spark gap main body 102 being connected with the second conductive seat 104b.This spark gap master Body 102 is hung in the hook and slot 1401 of the first conductive seat 104a by the peg 1402 of the second conductive seat 104b so that spark gap master Body 102 can carry out rotation up and down relative to insulator 101.Wherein, it is positioned at extreme higher position when spark gap main body 102 Time, the draw-in groove phase clamping of the upper end of spark gap main body 102 and conductive member 106, guide protrusions 104d is positioned at arc guide groove 104c；When spark gap main body 102 turns to extreme lower position, guide protrusions 104d skids off arc guide groove 104c, to allow The peg 1402 of two conductive seat 104b departs from the hook and slot 1401 of the first conductive seat 104a；When spark gap main body 102 is in highest order When putting the position rotation between extreme lower position, guide protrusions 104d is always positioned in arc guide groove 104c, to stop second The peg 1402 of conductive seat 104b departs from the hook and slot 1401 of the first conductive seat 104a.In this way, the falling of the present invention The formula that falls spark gap 100 is by the arc guide groove 104c being fitted to each other and guide protrusions 104d, it is ensured that thunder device main body 102 exists Damage and falling process depart from insulator 101 the most on one's own initiative, thus avoid spark gap main body 102 to inadvertently fall off and injure by a crashing object people or Thing.

Preferably, this rainhat 103 is integral type structure, and has inversion type U-shaped portion 103a and two lamellars are led To portion 103b, the most each lamellar guide part 103b, right-hand member with corresponding reversed formula U-shaped portion 103a is connected below respectively.Inversion type U The left end of type portion 103a is connected with the upper end of insulator 101, and this conductive member 106 is located in inversion type U-shaped portion 103a.When lightning-arrest When device main body 102 is rotated up relative to insulator 101, the lamellar at rainhat 103 is guided by the upper end of spark gap main body 102 Enter in rainhat 103 under the guiding function of portion 103b, until the upper end of spark gap main body 102 and the draw-in groove of conductive member 6 Till phase clamping.Traditional rainhat and guiding fork are united two into one by this rainhat 103, can not only ensure drop-type arrester The rainhat 103 of 100 has guide function, also can simplify assembly technology, thus be prone to improve production efficiency.

Embodiment two:

Fig. 4 is detecting system and the dust cleaning system of the drop-type arrester of the embodiment of the present invention two；Fig. 5 is the present invention The detecting system circuit diagram of the drop-type arrester of embodiment two；Fig. 6 is the local to self adaptation gas outlet in embodiment two View；Fig. 7 is the partial view of the element radiating sheet in embodiment two；In figure, the implication that each reference represents is as follows；1、 Housing；2, PCB；11, it is swept into device of air；12, defecator；13, pipeline is cleaned；14, self adaptation gas outlet；15、 Bimetal leaf；16, fin monomer；17, mirror surface；18, photosensitive switch；19, component；20, exhaust outlet；23, insulation Heat carrier；24, laser generator.Embodiment two adds detecting system exactly on the basis of embodiment one and dust cleaning is System.

Drop-type arrester leaks the most cruelly in the external world, and by impacts such as corrosion and dusts, self performance will be affected, Cannot ensure this problem of power grid security after losing efficacy in order to avoid spark gap main body, drop-type arrester includes housing 1 and detection System.This detecting system includes non-contact current sensor, and the PCB 2 being arranged in housing 1.Wherein, non-connect Touch current sensor is set on the wire between spark gap main body 102 and the earth, for detection leakage current.This detection System also includes signal amplification circuit, A/D modular converter and the logic controller (PLC or CPU) being located in PCB 2, non- Contact current sensor is sequentially connected electrically with signal amplification circuit, A/D modular converter and logic controller.

When the leakage current of spark gap main body 102 is acquired by non-contact current sensor, it is not with lightning-arrest Device main body 102 directly contacts with arrester ground line so that detection part is kept completely separate with lightning-arrest position, does not interfere with each other, it is ensured that Drop-type arrester 100 can with stable operation.Meanwhile, signal amplification circuit, A/D modular converter and logic controller are used (PLC or CPU), the spark gap leakage current gathered by non-contact current sensor, through signal amplification, mould revolution and logic After the process of controller, both can be shown in real time and Realtime Alerts by display screen and alarm.At the same time it can also be rely on and logic The data of leakage current of an arrester are stored by the data memory module that controller is connected, in order to inquiry in good time and analysis are lightning-arrest The record data that device produces during history run, and analysis result is processed in time, it is to avoid the generation of accident.

Drop-type arrester also include dust clear up system, dust cleaning system include first dust stratification detection device, second Dust stratification detection device and dust blow device, dust blow device includes being swept into device of air 11, in the present embodiment, cleans air inlet Device can be supply fan or inlet air compressor, is swept at the air inlet of device of air 11 and arranges defecator 12, clearly The cleaning pipeline 13 of the component 19 installed surface side sweeping into device of air 11 and be arranged at PCB 2 connects, and cleans pipeline Also in multiple self adaptation gas outlet 14 that is arranged over of multiple components 19 on 13, arrange many at each self adaptation gas outlet 14 Sheet bimetal leaf 15, the bimetal leaf 15 at each self adaptation gas outlet 14 when bimetal leaf 15 is in compared with cold state by adaptive Answer gas outlet 14 to close, bend to self adaptation gas outlet 14 lateral direction when bimetal leaf 15 is in relatively Warm status, by adaptive Answer gas outlet 14 to open, and when the temperature of bimetal leaf 15 is the highest when, the amplitude that self adaptation gas outlet 14 is opened is the biggest；

First dust stratification detection device includes the first capacitometer for measuring cell fin, and element radiating sheet is by many Individual fin monomer 16 is constituted, electric insulation between multiple fin monomers 16, the first capacitometer be connected with comparator and to Comparator feedback actual measurement capacitance, comparator is also connected with memorizer, Memory Reference capacitance in memorizer, and reference capacitance value is The capacitance between multiple fin monomers 16 when element radiating sheet non-accumulation dust, when actual measurement capacitance is beyond with benchmark electricity During the threshold value that capacitance is as the criterion and sets, be swept into device of air 11 and start, through filtered air via clean on pipeline 13 from Adapting to gas outlet 14 blow out, clean component 19, dirty air is discharged in housing 11 through exhaust outlet 20.

Second dust stratification detection device light-beam generator and at least one component 19 being arranged in PCB 2 it Between the mirror surface 17 of position, it is internal that light-beam generator is arranged on housing 1, light-beam generator with fixing angle by rectilinear light beam Being transmitted into mirror surface 17, after being reflected minute surface 17 reflection, light beam is projected onto the photosensitive switch 18 being provided with within housing 1 On, when photosensitive switch 18 senses less than reflection light, automatically start and be swept into device of air 11.

Owing to self adaptation gas outlet 14 being closed when bimetal leaf 15 is in relatively cold state, it is in relatively at bimetal leaf 15 Bend to self adaptation gas outlet 14 lateral direction during Warm status, self adaptation gas outlet 14 is opened, and when the temperature of bimetal leaf 15 The when of spending the highest, the amplitude that self adaptation gas outlet 14 is opened is the biggest；So that each self adaptation gas outlet 14 Area is different along with the temperature difference of the element below self adaptation gas outlet 14.Because for the element that temperature is the highest, it dissipates Hot side is long-pending can be designed to the biggest, or the surface of radiator portion is more conducive to the exchange of heat, but exactly the most beneficially heat The structure of exchange is also to cause air flowing change more acutely or to make air pass through thinner gap, and this structure is the most more Being conducive to generation and the increase of dust stratification, the dust accumulated after the identical time is the most, just with more empty cleaning when Throughput is cleared up.

When fin accumulation dust is more when, the gap between fin can reduce, and fin is as an entirety Electric capacity can diminish, so when electric capacity is varied down to certain value when, may mean that dust has run up to certain stage, institute Dust is cleared up with needs.

When PCB 2 and component 19 dust stratification are more when, the dust stratification on mirror surface 17 is the most more, when long-pending The when that ash being more, dust can produce obvious diffuse-reflectance effect, weakens the direct reflection effect of mirror surface 17 greatly, Photosensitive switch 18 can be caused cannot to receive the light intensity of sufficient intensity to be triggered.By another mode also achieve for The automatic monitoring of element surface dust stratification degree, thus significantly improve that element surface dust stratification is more and the short circuit that causes or The element burnout problems that heat radiation is not smooth and causes.

By arranging capacitance detecting and light detection two ways, can backup each other, to guarantee when dust runs up to necessarily The when of stage dust cleaning system can system in time, remove the dust of element surface covering.

Laser generator 24 directionality is good, and the light after direct reflection will not occur significantly to dissipate, but works as After some surface attachment dust, after particularly dust accumulation is more, it will obvious diffuse-reflectance occurs.Thus improve When having dust and a free from dust or the when that dust being many and dust is few, the discrimination of the light intensity that photosensitive switch 18 is able to receive that, Improve the reliability for light-intensity test, reduce the probability of error starting.

Particularly, fin monomer 16 is arranged on an insulating thermal conductor 23, edge between each fin monomer 16 The bearing of trend segmentation of diffusion sheet.

Insulating thermal conductor 23 can be attachment insulating barrier on metal material, in the case of significantly reducing heat conductivility, Make each fin monomer 16 mutually insulated, so that constituting electric capacity between each monomer of fin.By making each Fin is split along bearing of trend, can independently constitute electric capacity, it is simple to wiring between each fin monomer 16.

Particularly, the quantity of the bimetal leaf 15 at each self adaptation gas outlet 14 is 6.Bimetal leaf 15 includes Active layers and passive layer, active layers is manganin manganin alloy, and the material of passive layer is mainly dilval.

When the quantity of bimetal leaf 15 is 6 when, the lateral restriction tension force in each bimetal leaf 15 is the most less, So that bimetal leaf 15 forms bigger flexural deformation, the quantity of sheet metal is the most abundant, it is not necessary to be further added by sheet metal Quantity with reduce system reliability.

Bimetal leaf 15 uses monel as active layers, and its deformation quantity is relatively big, thus obtains obvious opening Effect.

Particularly, on the basis of the lower limit of threshold value 0.9 times of capacitance.

On the basis of capacitance when of 0.9 times of capacitance, the dust on electric elements is the most more, if not in time Cleaning, it will cause element radiating not smooth, thus reduce the serviceability of detection device.

It is as follows that the dust of the present embodiment cleans operating principle:

The when that between component or fin, upper dust stratification being more, the actual range between fin monomer can under Fall, the air of the non-conductor as electricity between metal fin, also have the space shared by partial air and taken by dust In generation, so the electric capacity between fin monomer can decline step by step along with the accumulation of dust.When capacitance is low under threshold value In limited time, startup is swept into device of air.

In addition to this detection mode, it is also provided with the mode of light detection, when dust accumulates relatively on mirror surface The when of many, the reflectance of direct reflection can be reduced, reduce the intensity of illumination that photosensitive switch can receive, photosensitive switch sense Should be less than reflection light, then photosensitive switch Guan Bi, automatically start and be swept into device of air.

It is swept into after device of air starts and absorbs the most filtered cleaned air from the external world, send into and clean in pipeline.Due to Bimetal leaf at self adaptation gas outlet is as variations in temperature and shape is altered in steps, so self adaptation gas outlet now Open, and, the self adaptation gas outlet above hotter element is opened bigger, above the most colder element Self adaptation gas outlet is opened less, so that the flow of cleaned air can different the dividing according to the different temperatures of element Cloth, to improve the utilization ratio of cleaned air.Can allow be swept into after device of air first blows the very first time and be automatically switched off, such as first Time can be half a minute.Then second time that waited allows and is suspended in the ash fall in enclosure interior space, because while adaptive Giving vent to anger of gas outlet is answered to be blown afloat by the dust of component surface, and constantly to enclosure interior space make-up air, from becoming greatly Gesture is said, the air being mixed with dust can be discharged from exhaust outlet, but cannot guarantee that after some time, is mixed with the air of dust Will all discharge from enclosure interior space.So after blowing over a period of time, the air in space in housing, is still mixed in fact There is the air of a small amount of dust, so needing to wait for a period of time, allowing dust in air settle.Such as second time can be 3 points Clock or 2 minutes.After ash fall in housing, then detect electric capacity, if remaining less than threshold value, then continue to clean, as Fruit there is a need to if then so the most repeatedly so that the dust on element and circuit board is cleaned up.

Embodiment three:

Fig. 8 is the structural representation of the fin in the embodiment of the present invention three；In figure, in accompanying drawing used by embodiment two The implication that the reference occurred represents continues to use the implication in embodiment two accompanying drawing, and what each reference emerging represented contains Justice is as follows；

The present embodiment is with the difference of embodiment two:

Fin monomer 16 is arranged on an insulating thermal conductor 23, along circular dividing between each fin monomer 16.

Insulating thermal conductor 23 can be attachment insulating barrier on metal material, in the case of significantly reducing heat conductivility, Make each fin monomer 16 mutually insulated, so that constituting electric capacity between each fin monomer 16 of fin.

Embodiment four:

Fig. 9 is the structural representation of embodiment four.

In figure, the implication that the reference occurred in accompanying drawing used by embodiment two represents is continued to use in embodiment two accompanying drawing Implication, the implication that each reference emerging represents is as follows: 21, LED；22, concave mirror；

In embodiment two, light-beam generator uses laser generator, in the present embodiment, it is also possible to occurred by light beam Device is set to include LED 21 and concave mirror 22, and light is projected on concave mirror 22 by LED 21, and is reflected by concave mirror 22 After send directional light.LED etc. 21, as a kind of widely used light source, are reflected by concave mirror 22, the most permissible Obtain the preferable directional light of quality.

Although the preferred embodiments of the present invention being described above in conjunction with accompanying drawing, but the invention is not limited in The detailed description of the invention stated, above-mentioned detailed description of the invention is only schematically, is not restrictive, this area common Technical staff, under the enlightenment of the present invention, in the case of without departing from present inventive concept and scope of the claimed protection, also may be used To make a lot of form, such as: 1. embodiment 2 is to be the annular of L-shaped by a cross section, fixes each bimetal leaf Afterbody, actually can also be connected bimetal leaf with the surface cleaning pipeline by the way of bonding or soldering；2. embodiment 2 In each self adaptation gas outlet at bimetal leaf be 6,3-10 sheet can essentially be made into, when the quantity of bimetal leaf is The when of 3, can form a bad angle by each bimetal leaf so that this sheet metal can have one and can open Tip, when being heated when, tip levers up, and can form the air channel of self adaptation air outlet.When the quantity of bimetal leaf is 10 When, the lateral restriction tension force in each bimetal leaf is the most less, becomes so that bimetal leaf forms bigger bending Shape, the quantity of sheet metal is the most abundant, it is not necessary to be further added by the quantity of sheet metal to reduce the reliability of system；3. will be the most each In individual embodiment, the most conflicting technological means is mutually combined, and constitutes the technology the most directly described in detailed description of the invention part Scheme.Within these belong to protection scope of the present invention.

In the description of the present application, it is to be understood that term " on ", D score, the orientation of the instruction such as "left", "right" or position Relation of putting for based on orientation shown in the drawings or position relationship, be for only for ease of the description present invention and simplifying describe rather than Instruction or hint indication device or element must have specific orientation, with specific azimuth configuration and operation, therefore can not It is interpreted as limitation of the present invention.

Although by reference to preferred embodiment, invention has been described, but in the situation without departing from the scope of the present invention Under, it can be carried out various improvement and parts therein can be replaced with equivalent.Especially, as long as there is not structure punching Prominent, the every technical characteristic being previously mentioned in each embodiment all can be combined in any way.The invention is not limited in Specific embodiment disclosed herein, but include all technical schemes fallen within the scope of the appended claims.

Claims (10)

1. a drop-type arrester, it is characterised in that including:

Insulator；

Rainhat, its left end is connected with the upper end of described insulator, is provided with the conductive member of band draw-in groove in described rainhat；

Fall device, including the first conductive seat and second conductive seat of band peg of band hook and slot, described first conductive seat with described absolutely The lower end of edge is connected, and is provided with arc guide groove, and is provided with and institute on described second conductive seat on described first conductive seat State the guide protrusions that arc guide groove matches；And

The spark gap main body being connected with described second conductive seat, described spark gap main body is hung by the peg of described second conductive seat In the hook and slot of described first conductive seat so that described spark gap main body can be carried out up and down relative to described insulator Rotation；

Wherein, when described spark gap main body is positioned at extreme higher position, the upper end of described spark gap main body and described conductive member Draw-in groove phase clamping, described guide protrusions is positioned at described arc guide groove；

When described spark gap body rotation is to extreme lower position, described guide protrusions skids off described arc guide groove, to allow State in the hook and slot of peg described first conductive seat of disengaging of the second conductive seat；

When described spark gap main body position between extreme higher position and extreme lower position rotates, described guide protrusions is always positioned at In described arc guide groove, to stop the peg of described second conductive seat to depart from the hook and slot of described first conductive seat.

Drop-type arrester the most according to claim 1, it is characterised in that described arc guide groove has for guiding State guide protrusions and slip into the lead-in chamfered of described arc guide groove.

Drop-type arrester the most according to claim 1, it is characterised in that being shaped as of described guide protrusions is cylindric.

Drop-type arrester the most according to claim 1, it is characterised in that being shaped as of described guide protrusions is hemispherical.

Drop-type arrester the most according to claim 1, it is characterised in that also include that detecting system and dust cleaning are System,

Described detecting system includes: non-contact current sensor, is set in the wire between described spark gap main body and the earth On；There is the housing of PCB；It is arranged on the signal amplification circuit in described PCB, A/D modular converter, logic control Device processed and alarm；Wherein, described non-contact current sensor, signal amplification circuit, A/D modular converter and logic controller Being sequentially connected electrically, described logic controller, after detecting the Leakage Current of spark gap, controls alarm and sends alarm；

Described dust cleaning system includes the first dust stratification detection device, the second dust stratification detection device, exhaust outlet and dust purging dress Putting, described dust blow device includes being swept into device of air, described in be swept at the air inlet of device of air defecator be set, institute State the cleaning pipeline connection of the component installed surface side being swept into device of air and be arranged at PCB, described cleaning pipe Road is positioned at above described component, and is provided with self adaptation gas outlet in the position of corresponding heater element, each described adaptive Answering and arrange multi-disc sector bimetal leaf at gas outlet, time below deformation temperature, described multi-disc sector bimetal leaf is mutually adjacent Constituting discoid, thus closed described self adaptation gas outlet, higher than during deformation temperature, described bimetal leaf is to described self adaptation The bending of gas outlet lateral direction, opens described self adaptation gas outlet, and when the temperature of described bimetal leaf is the highest, described from The amplitude that adaptation gas outlet is opened is the biggest；

Described first dust stratification detection device includes the first capacitometer for measuring cell fin capacitance and comparator, Described element radiating sheet is made up of multiple fin monomers, electric insulation between multiple fin monomers, described first capacitance measurement Electric capacity between fin monomer is detected by device, when comparator judges to measure capacitance less than threshold value electric capacity, starts It is swept into device of air, blows out via the self adaptation gas outlet on described cleaning pipeline through filtered air, to described circuit elements Part cleans；

Described in exhaust outlet, the second dust stratification detection device includes light-beam generator and at least one reflection being arranged in PCB Minute surface, this light-beam generator is arranged in described actuator housing internal side wall, light-beam generator with fixing angle by straight line Beam emissions is to described mirror surface, and after described mirror surface reflects, light beam is projected onto and is positioned at actuator housing private side Photosensitive switch on wall, photosensitive switch remains on after receiving light beam；When the dust stratification on mirror surface reaches predetermined thickness When spending, photosensitive switch sensing is less than reflection light, then photosensitive switch Guan Bi, startup is swept into device of air automatically；

When any one startup in this first dust stratification detection device and the second dust stratification detection device is swept into device of air, this cleaning Air intake installation starts, and after the scheduled time, this is swept into device of air and is automatically switched off.

Drop-type arrester the most according to claim 5, it is characterised in that described light-beam generator is laser generator.

Drop-type arrester the most according to claim 5, it is characterised in that described light-beam generator includes LED and recessed Face mirror, light is projected on described concave mirror by described LED, and by sending directional light after concave mirror.

Drop-type arrester the most according to claim 5, it is characterised in that described fin monomer is arranged at an insulation On heat carrier, between each described fin monomer, the bearing of trend along diffusion sheet is split, or, each described fin monomer Between along circular dividing.

Drop-type arrester the most according to claim 5, it is characterised in that the fan at each described self adaptation gas outlet The quantity of shape bimetal leaf is 3-10 sheet, and described bimetal leaf includes that active layers and passive layer, described active layers are that manganese ambrose alloy closes Gold, passive layer is dilval.

Drop-type arrester the most according to claim 5, it is characterised in that described exhaust outlet is arranged on described driver On housing farthest away from the described position being swept into device of air.