CN201051613Y - Heat activated arrester falling device - Google Patents
Heat activated arrester falling device Download PDFInfo
- Publication number
- CN201051613Y CN201051613Y CNU2007200246399U CN200720024639U CN201051613Y CN 201051613 Y CN201051613 Y CN 201051613Y CN U2007200246399 U CNU2007200246399 U CN U2007200246399U CN 200720024639 U CN200720024639 U CN 200720024639U CN 201051613 Y CN201051613 Y CN 201051613Y
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- lightning arrester
- shell
- thermal excitation
- wire
- comes
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Abstract
The utility model relates to a thermal agitation type lightning arrester drop device belonging to the field of a lightning arrester and a drop device of the lightning arrester, which is characterized in that the utility model is composed of a thermal promoter and a drop apparatus. The lower end of the thermal promoter is connected with the upper end of the drop apparatus. A normally open contact, a bimetallic strip, and an external twisting electric-heat wire of the thermal promoter are connected with the lower end of the lightning arrester. The normally open contact is connected with the upper end of the drop apparatus, and the lower end of the drop apparatus and the lower end of the electric-heat wire are connected with earth wires. The thermal promoter comprises an outer casing, an upper connector, a lower connector, an earth wire connecting pig, a strip conductor, a normally open contact, a bimetallic strip, and an external twisting electric-heat wire. The normally open contact, the bimetallic strip, and the external twisting electric-heat wire are all mounted in an inner chamber of the outer casing of the thermal promoter. The utility model has the advantages that when lightning stroke electric voltage happens on an electrified wire netting, lightning current gets into the ground through the electric-heat wire instantly, which can not lead the drop apparatus to be exploded. As soon as the lightning arrester is on short circuit damage, short-circuit current can lead the electric-heat wire to heat to ignite the drop apparatus, and electrified wire netting high pressure earth connection accidents can be prevented from happening.
Description
(1) technical field
The utility model relates to lightning arrester and dropping device thereof, also relates to piezo-resistance and thermal relay, particularly is a kind of heat shock hairdo lightning arrester dropping device.
(2) background technology
The lightning arrester that 6～10KV transmission line is at present commonly used is based on that the principle design of piezo-resistance forms.Its upper end is electrically connected with the three-phase high-voltage of dihedral connection, and its lower end is connected with ground wire.At no thunder and lightning weather, the piezo-resistance resistance of lightning arrester is very big, is open-circuit condition; If moment thunderbolt voltage takes place on the thunderstorm weather electrical network, the piezo-resistance resistance of lightning arrester is zero, moment thunder-strike current go into ground at a terrific speed, thereby protect grid equipment to exempt from thunderbolt.If yet lightning arrester is bad, does not only have the lightning protection effect, also high voltage short circuit earth fault might take place.In order to address this problem, people's device that comes off of a thermal-explosion type in the series connection below lightning arrester, in case the lightning arrester short circuit damages, short circuit current will make the device that comes off form open circuit at instantaneous explosion, prevents that the high-voltage earthing accident from taking place.But, cause new problem therefrom, when thunderbolt voltage takes place, equally also can ignite the device that comes off, will frequently change the device that comes off.Patent documentation by retrieval, wherein three pieces of patent No.s are 01228711.3,96206715.6,94243689.X can be used as weak relevant documents of the present utility model, but its architectural feature and operation principle has significant difference.
(3) summary of the invention
The purpose of this utility model just is the innovation development, a kind of distinguished heat shock hairdo lightning arrester dropping device is provided.Have only when the lightning arrester short circuit damages, the heat that short circuit current produces can be ignited the device that comes off indirectly, prevents that electrical network high-voltage earthing accident from taking place; When thunderbolt voltage takes place when, moment thunder-strike current go into ground through bypass, the device that no longer causes coming off explodes and comes off, and makes this device still can operate as normal.Can normally take shelter from the thunder, save a large amount of manpower and materials again.
Above-mentioned purpose is realized by following technical proposals:
Heat shock hairdo lightning arrester dropping device comprises the thermal excitation device and the device two parts that come off, and it is characterized in that two parts all have a style of one's own, and independently shell is respectively arranged, and electric component places within the shell.The upper end of thermal excitation device is connected with the lower end of lightning arrester, and the lower end of thermal excitation device is connected with the upper end of the device that comes off.Electrical connection is, the normally opened contact in the thermal excitation device, bimetal leaf and all be connected outward with the lower end of lightning arrester around heating wire, and normally opened contact is connected with the upper end of the device that comes off again, and the lower end of the device that comes off and the lower end of heating wire all are connected with ground wire.The thermal excitation device is made up of around heating wire outside reaching shell, upper connector, following connector, ground wire connection metal derby, strip conductor, normally opened contact, bimetal leaf.Upper connector is contained in the top of shell, and following connector is contained in the bottom of shell, and ground wire connects metal derby and is contained on the shell, normally opened contact, bimetal leaf and the outer inner chamber that all is contained in shell around heating wire.
Upper connector in the above-mentioned heat shock hairdo lightning arrester dropping device and following connector all adopt the assembling of engage thread and shell, the epoxy resin sealing of its outer end.
Ground wire in the above-mentioned heat shock hairdo lightning arrester dropping device connects the Side face that metal derby is embedded in shell, and fixes with binding agent.The upper end of strip conductor is connected metal derby and connects with ground wire, the lower end is connected with the ground wire screw rod of the device bottom that comes off, and the property-line nut is fixed.
Normally opened contact in the above-mentioned heat shock hairdo lightning arrester dropping device is similar to the normally opened contact in the thermal relay, is subjected to the control of bimetal leaf, and it is then closed to be heated.
Heating wire resistance value in the above-mentioned heat shock hairdo lightning arrester dropping device is 2 Ω ± 5%, and its upper end is connected with upper connector, and its lower end is connected metal derby and connects with ground wire.
The heat shock hairdo lightning arrester dropping device that manufactures according to technique scheme, owing to increased the thermal excitation device, heating wire wherein plays shunting action, so when thunderbolt voltage takes place electrical network, moment, lightning current was through heating wire and no longer through coming off device, the device that no longer causes coming off blast.In case the lightning arrester short circuit damages, short circuit current is gone into ground through heating wire, electrothermal wire heating and bimetal leaf limit shape makes the closed conducting of normally opened contact, the device that causes coming off blast and ground wire disconnection.Both had normal lightning protection function, and overcome above-mentioned tradition again and come off device whenever the shortcoming that has thunderbolt voltage to demolish.It is simple in structure, and cost is low, and the structure that need not change the former lightning arrester and the device that comes off gets final product supporting installing and using, and has better economic benefit and social benefit.
(4) description of drawings
Accompanying drawing 2 is circuit diagrams of the present utility model.
(5) embodiment
Embodiment of accompanying drawings:
Among Fig. 1, the 1st, lightning arrester, the 2nd, the following connector of lightning arrester, the 3rd, the upper connector of thermal excitation device, the 4th, normally opened contact, the 5th, the shell of thermal excitation device, the 6th, the following connector of thermal excitation device, the 7th, the upper connector of the device that comes off, the 8th, the device that comes off, the 9th, ground wire nut, the 10th, the device grounding screw rod comes off, the 11st, bimetal leaf and outer around heating wire, the 12nd, ground wire connects metal derby, the 13rd, strip conductor.
By shown in Figure 1, heat shock hairdo lightning arrester dropping device comprises the thermal excitation device 5 and device 8 two parts that come off, and it is characterized in that two parts all have a style of one's own, and independently shell is respectively arranged, and electric component places within the shell.The upper end of thermal excitation device 5 is connected with the lower end of lightning arrester 1, and the lower end of thermal excitation device 5 is connected with the upper end of the device 8 that comes off.
By shown in Figure 2, the normally opened contact 4 in the thermal excitation device, bimetal leaf are connected around the lower end of heating wire 11 with lightning arrester 1 outside reaching, and normally opened contact 4 is connected with the upper end of the device 8 that comes off again.The come off lower end of device 8 and the lower end of heating wire 11 all is connected with ground wire.
By shown in Figure 1, the thermal excitation device is made up of around heating wire 11 outside reaching shell 5, upper connector 3, following connector 6, ground wire connection metal derby 12, strip conductor 13, normally opened contact 4, bimetal leaf.Upper connector 3 is contained in the top of shell 5, and following connector 6 is contained in the bottom of shell 5, and ground wire connects metal derby 12 and is contained on the shell 5, normally opened contact 4, bimetal leaf and the outer inner chamber that all is contained in shell 5 around heating wire 11.The upper end of strip conductor 13 is connected metal derby 12 and connects with ground wire, the lower end is connected with the ground wire screw rod 10 of device 8 bottoms that come off, and property-line nut 9 is fixing.
Operation principle of the present utility model is: as shown in Figure 2, the upper end of lightning arrester 1 is connected with a certain of 6～10KV electrical network, and the grounding screw rod 10 of device 8 lower ends that come off and the strip conductor 13 of heating wire 11 lower ends all are connected with ground wire.When thunderbolt voltage took place, the lightning arrester made from piezo-resistance 1 was by high impedance vanishing impedance, and instantaneous thunder-strike current is gone into ground through the heating wire 11 of 2 Ω, has both reached lightning-arrest purpose, and the feasible again device 8 that comes off is safe and sound.In case lightning arrester 1 short circuit damages, short circuit current also goes into ground through 2 Ω heating wire 11.The about 5A of this electric current makes heating wire 11 quick heating ups, and bimetal leaf promotes normally opened contact 4 closed conductions because of temperature distortion, and the electric cap blast in the device 8 that causes coming off disconnects ground wire, prevents because of lightning arrester 1 short circuit initiation electrical network high-voltage earthing accident.
Claims (5)
1. heat shock hairdo lightning arrester dropping device, comprise thermal excitation device (5) and the device that comes off (8) two parts, it is characterized in that two parts all have a style of one's own, independently shell is respectively arranged, electric component places within the shell, the upper end of thermal excitation device (5) is connected with the lower end of lightning arrester, and the lower end of thermal excitation device (5) is connected with the upper end of the device that comes off (8); Its electrical connection is, normally opened contact in the thermal excitation device (4), bimetal leaf are connected with lightning arrester (1) around heating wire (11) outside reaching, normally opened contact (4) is connected with the upper end of the device that comes off (8) again, and the lower end of the lower end of the device that comes off (8) and heating wire (11) all is connected with ground wire; The thermal excitation device is made up of around heating wire (11) outside reaching shell (5), upper connector (3), following connector (6), ground wire connection metal derby (12), strip conductor (13), normally opened contact (4), bimetal leaf, upper connector (3) is contained in the top of shell (5), following connector (6) is contained in the bottom of shell (5), ground wire connects metal derby (12) and is contained on the shell (5), normally opened contact (4), bimetal leaf and the outer inner chamber that all is contained in shell (5) around heating wire (11).
2. heat shock hairdo lightning arrester dropping device according to claim 1 is characterized in that upper connector (3) and following connector (6) in the thermal excitation device, all adopts engage thread and shell (5) assembling, the epoxy resin sealing of its outer end.
3. heat shock hairdo lightning arrester dropping device according to claim 1, it is characterized in that the ground wire in the thermal excitation device connects the side that metal derby (12) is embedded in shell (5), and fix with binding agent, the upper end of strip conductor (13) is connected metal derby (12) and connects with ground wire, the lower end is connected with the ground wire screw rod (10) of the device that comes off (8) bottom, and property-line nut (9) is fixing.
4. heat shock hairdo lightning arrester dropping device according to claim 1 is characterized in that normally opened contact (4) in the thermal excitation device is similar to the normally opened contact in the thermal relay, controlled by bimetal leaf, and it is then closed to be heated.
5. heat shock hairdo lightning arrester dropping device according to claim 1 is characterized in that heating wire (11) resistance value in the thermal excitation device is 2 Ω ± 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200246399U CN201051613Y (en) | 2007-06-26 | 2007-06-26 | Heat activated arrester falling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007200246399U CN201051613Y (en) | 2007-06-26 | 2007-06-26 | Heat activated arrester falling device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201051613Y true CN201051613Y (en) | 2008-04-23 |
Family
ID=39338104
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007200246399U Expired - Fee Related CN201051613Y (en) | 2007-06-26 | 2007-06-26 | Heat activated arrester falling device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201051613Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101083165B (en) * | 2007-06-26 | 2010-08-04 | 中国石化集团胜利石油管理局电力管理总公司 | Lightning arrester with thermal excitation dropper |
| CN107688104A (en) * | 2017-08-08 | 2018-02-13 | 芜湖市凯鑫避雷器有限责任公司 | A kind of fault detector |
-
2007
- 2007-06-26 CN CNU2007200246399U patent/CN201051613Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101083165B (en) * | 2007-06-26 | 2010-08-04 | 中国石化集团胜利石油管理局电力管理总公司 | Lightning arrester with thermal excitation dropper |
| CN107688104A (en) * | 2017-08-08 | 2018-02-13 | 芜湖市凯鑫避雷器有限责任公司 | A kind of fault detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20080423 |