CN113725034A - Trigger device for gas-triggered gap switch - Google Patents
Trigger device for gas-triggered gap switch Download PDFInfo
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- CN113725034A CN113725034A CN202110799450.1A CN202110799450A CN113725034A CN 113725034 A CN113725034 A CN 113725034A CN 202110799450 A CN202110799450 A CN 202110799450A CN 113725034 A CN113725034 A CN 113725034A
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- 230000001960 triggered effect Effects 0.000 title claims abstract description 31
- 230000007246 mechanism Effects 0.000 claims abstract description 52
- 238000002347 injection Methods 0.000 claims abstract description 23
- 239000007924 injection Substances 0.000 claims abstract description 23
- 230000002093 peripheral effect Effects 0.000 claims description 19
- 238000009434 installation Methods 0.000 claims description 11
- 230000006978 adaptation Effects 0.000 claims 4
- 238000005507 spraying Methods 0.000 abstract description 4
- 239000007789 gas Substances 0.000 description 40
- 239000012212 insulator Substances 0.000 description 19
- 238000003825 pressing Methods 0.000 description 18
- 238000000034 method Methods 0.000 description 15
- 238000003466 welding Methods 0.000 description 15
- 230000008569 process Effects 0.000 description 10
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical compound [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 9
- 230000009471 action Effects 0.000 description 5
- 238000003780 insertion Methods 0.000 description 5
- 230000037431 insertion Effects 0.000 description 5
- 229910018503 SF6 Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 4
- 229960000909 sulfur hexafluoride Drugs 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
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- 238000012423 maintenance Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05H—PLASMA TECHNIQUE; PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OF NEUTRONS; PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMIC BEAMS
- H05H1/00—Generating plasma; Handling plasma
- H05H1/24—Generating plasma
- H05H1/26—Plasma torches
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- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Plasma Technology (AREA)
Abstract
The invention relates to a trigger device for a gas-triggered gap switch, which comprises a ground electrode, a trigger mechanism and a fixing piece, wherein the ground electrode is arranged on the ground electrode; the ground electrode and the fixing piece are enclosed together to form an accommodating cavity, the top end of the ground electrode is provided with an injection hole, the injection hole is communicated with the accommodating cavity, the trigger mechanism is accommodated in the accommodating cavity, the bottom end of the trigger mechanism is provided with a first lead and a second lead, the first lead and the second lead are separated by a preset distance, and the first lead and the second lead both penetrate through the fixing piece to be connected with an external trigger; the trigger mechanism comprises a trigger electrode assembly and a middle electrode assembly, the trigger electrode assembly is inserted in the middle electrode assembly, one end of the first lead, which is far away from the external trigger, is connected with the trigger electrode assembly, and one end of the second lead, which is far away from the external trigger, is connected with the middle electrode assembly; the trigger mechanism is used for spraying plasma into the gas gap; by the arrangement, the working difficulty coefficient is reduced, and reliable and long-life triggering of the plasma is realized.
Description
Technical Field
The invention relates to the technical field of gas-triggered gap switches, in particular to a trigger device for a gas-triggered gap switch.
Background
Currently, the gas-triggered gap switch is a sulfur hexafluoride (SF) gas-triggered gap switch6) Or sulfur hexafluoride/nitrogen (SF)6/N2) The gas is used as an insulating medium, a quick-closing switch for conducting the main gap within 1ms is utilized by utilizing a plasma microcavity injection technology, and the gas-triggered gap switch can be connected with a breaker in parallel for use, so that the problems of quick control and protection of a power grid are solved.
The working principle of the gas-triggered gap switch is that the plasma jet device releases a large amount of plasma in the micro-cavity under the action of high-voltage pulse to trigger the conduction of the main gap. Common plasma triggering techniques based on high voltage pulses include single-stage triggering and dual-stage triggering.
However, the single-stage triggering requires a large triggering energy, which results in a high difficulty factor.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the trigger device for the gas-triggered gap switch, which has the advantages of reducing the working difficulty coefficient, realizing the reliable and long-life triggering of the plasma and being suitable for the gas-triggered gap switch.
The above object of the present invention is achieved by the following technical solutions: a trigger device for a gas-triggered gap switch comprises a ground electrode, a trigger mechanism and a fixing piece; the ground electrode and the fixing piece are enclosed together to form an accommodating cavity, the top end of the ground electrode is provided with an injection hole, the injection hole is communicated with the accommodating cavity, the trigger mechanism is accommodated in the accommodating cavity, the bottom end of the trigger mechanism is provided with a first lead and a second lead, the first lead and the second lead are separated by a preset distance, and the first lead and the second lead both penetrate through the fixing piece to be connected with an external trigger; the trigger mechanism comprises a trigger electrode assembly and a middle electrode assembly, the trigger electrode assembly is inserted in the middle electrode assembly, one end of the first lead, which is far away from the external trigger, is connected with the trigger electrode assembly, and one end of the second lead, which is far away from the external trigger, is connected with the middle electrode assembly; the triggering mechanism is used for ejecting plasma into the gas gap.
Preferably, the trigger device for a gas-triggered gap switch provided by the present invention includes a trigger electrode and a first insulating member, wherein the first insulating member is provided with a mounting hole, the trigger electrode is inserted into the mounting hole, and an outer peripheral wall of the trigger electrode abuts against an inner peripheral wall of the mounting hole; the top end of the first insulating part is provided with an adjusting hole extending along the central axis direction of the mounting hole, the adjusting hole is communicated with the mounting hole, the top end of the trigger electrode is provided with an adjusting part, and the adjusting part is inserted in the adjusting hole.
Preferably, the trigger device for a gas-triggered gap switch provided by the present invention further comprises a conducting disc located at the bottom end of the first insulating member, and the top end of the conducting disc abuts against the bottom end of the first insulating member; set up on the switch-on disc along the through-hole that the axis direction of mounting hole extends, the through-hole with the mounting hole intercommunication, trigger electrode's bottom is provided with the threaded rod, set up in the through-hole with threaded rod assorted internal thread, the threaded rod passes through the through-hole with the switch-on disc is connected, first wire deviates from the one end of external trigger with the switch-on disc is connected.
Preferably, in the trigger device for a gas-triggered gap switch provided by the present invention, the intermediate electrode assembly includes an intermediate electrode and a second insulating member, the second insulating member is provided with a fixing hole extending along a central axis direction of the mounting hole, the intermediate electrode is inserted into the fixing hole, and an outer peripheral wall of the intermediate electrode abuts against an inner peripheral wall of the fixing hole; the top of second insulating part seted up along the connecting hole that the axis direction of fixed orifices extended, the connecting hole with the fixed orifices intercommunication, middle electrode subassembly is last to be seted up along the via hole that the axis direction of fixed orifices extended, the connecting hole with the via hole corresponds the setting, just the connecting hole with the via hole intercommunication.
Preferably, in the trigger device for a gas-triggered gap switch provided by the present invention, the accommodating cavity includes a rotating cavity formed in the ground electrode and an accommodating groove formed in the fixing member, one end of the trigger mechanism is inserted into the rotating cavity, an outer wall of the trigger mechanism abuts against an inner wall of the rotating cavity, and the other end of the trigger mechanism is inserted into the accommodating groove; the injection hole extends along the axis direction of the rotating cavity, and the injection hole is communicated with the rotating cavity.
Preferably, in the triggering device for a gas-triggered gap switch provided by the present invention, the first insulating member, the middle electrode, and the second insulating member are all inverted T-shaped.
Preferably, the fixing piece is cylindrical, the top end of the fixing piece is provided with an air inlet groove extending along the radial direction of the fixing piece, and the air inlet groove is communicated with the accommodating cavity; the air inlet groove is used for allowing external insulating gas to flow into the accommodating cavity.
Preferably, the fixing member is provided with a plurality of air inlet grooves, and the plurality of air inlet grooves are arranged around the fixing member at intervals in the circumferential direction.
Preferably, in the triggering device for triggering the gap switch by using gas provided by the invention, an installation part is arranged at the bottom end of the fixing part, the top end of the installation part is connected with the bottom end of the fixing part, a first clamping groove matched with the first lead and a second clamping groove matched with the second lead are formed in the installation part, the first clamping groove and the second clamping groove both penetrate through the installation part, one end of the first lead, which extends out of the fixing part, penetrates through the first clamping groove to be connected with the external trigger, and one end of the second lead, which extends out of the fixing part, penetrates through the second clamping groove to be connected with the external trigger.
Preferably, the trigger device for the gas-triggered gap switch provided by the invention further comprises a pressing plate, wherein a first groove matched with the first lead and a second groove matched with the second lead are formed in the pressing plate, the first groove and the second groove both penetrate through the pressing plate, the first groove and the first clamping groove are correspondingly arranged, the second groove and the second clamping groove are correspondingly arranged, the pressing plate is covered on one side of the mounting part, the pressing plate is detachably connected with the mounting part, one side of the first lead, which is deviated from the first clamping groove, is inserted in the first groove, and one side of the second lead, which is deviated from the second clamping groove, is inserted in the second groove.
In conclusion, the beneficial technical effects of the invention are as follows: the application provides a trigger device for a gas-triggered gap switch, which comprises a ground electrode, a trigger mechanism and a fixing piece; the ground electrode and the fixing piece are enclosed together to form an accommodating cavity, the top end of the ground electrode is provided with an injection hole, the injection hole is communicated with the accommodating cavity, the trigger mechanism is accommodated in the accommodating cavity, the bottom end of the trigger mechanism is provided with a first lead and a second lead, the first lead and the second lead are separated by a preset distance, and the first lead and the second lead both penetrate through the fixing piece to be connected with an external trigger; the trigger mechanism comprises a trigger electrode assembly and a middle electrode assembly, the trigger electrode assembly is inserted in the middle electrode assembly, one end of the first lead, which is far away from the external trigger, is connected with the trigger electrode assembly, and one end of the second lead, which is far away from the external trigger, is connected with the middle electrode assembly; the trigger mechanism is used for spraying plasma into the gas gap; the trigger electrode assembly is connected with the first lead, the middle electrode assembly is connected with the second lead, so that the trigger electrode assembly is conveniently connected with the external trigger through the first lead, and the middle electrode assembly is connected with the external trigger through the second lead, and therefore, the work difficulty coefficient is reduced; meanwhile, the triggering mechanism is arranged to spray plasma into the gas gap, so that reliable and long-life triggering of the plasma is realized.
Drawings
Fig. 1 is a schematic overall structure diagram of a trigger device according to an embodiment of the present invention.
Fig. 2 is a sectional view of a trigger device provided in an embodiment of the present invention.
Fig. 3 is a first schematic structural diagram of a fixing element in the triggering device according to the embodiment of the present invention.
Fig. 4 is a second schematic structural diagram of a fixing member in the triggering device according to the embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a pressure plate in the triggering device provided in the embodiment of the present invention.
In the figure, 1, a trigger device; 10. a ground electrode; 101. an injection hole; 20. a trigger mechanism; 201. a trigger electrode assembly; 2011. a trigger electrode; 2012. a first insulating member; 2013. a primary cavity; 2014. an adjustment part; 2015. conducting the disc; 2016. a through hole; 2017. welding the hole; 2018. a threaded rod; 2019. a first flange; 202. an intermediate electrode assembly; 2021. an intermediate electrode; 2022. a second insulating member; 2023. a secondary cavity; 2024. a via hole; 2025. a second flange; 2026. a third flange; 2027. welding holes; 30. a fixing member; 301. accommodating grooves; 302. an air inlet groove; 303. an installation part; 3031. a first card slot; 3032. a second card slot; 3033. a threaded hole; 304. a first wire passing hole; 305. a second wire passing hole; 306. fixing grooves; 40. a first conductive line; 50. a second conductive line; 60. pressing a plate; 601. a first groove; 602. a second groove; 603. bolt holes.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1 and 2, a triggering device 1 for a gas-triggered gap switch disclosed in the present invention includes a ground electrode 10, a triggering mechanism 20, and a fixing member 30; the ground electrode 10 and the fixing member 30 together enclose a containing cavity, the trigger mechanism 20 is contained in the containing cavity, a first conducting wire 40 and a second conducting wire 50 are arranged at the bottom end of the trigger mechanism 20, the first conducting wire 40 and the second conducting wire 50 are separated by a preset distance, and both the first conducting wire 40 and the second conducting wire 50 penetrate through the fixing member 30 to be connected with an external trigger; the trigger mechanism 20 is used to inject plasma into the gas gap; the first wire 40 and the second wire 50 are connected to an external trigger, so that the trigger function of the trigger mechanism 20 is realized.
Specifically, the fixing member 30 is made of an insulating material, the fixing member 30 is disposed at the bottom end of the ground electrode 10, and the fixing member 30 is detachably connected to the ground electrode 10; thereby, maintenance of the trigger mechanism 20 is facilitated. The fixing member 30 and the ground electrode 10 may be connected by a bolt, the fixing member 30 and the ground electrode 10 may also be connected by a plug, and the fixing member 30 and the ground electrode 10 may also be connected by a snap, which is not limited in this embodiment.
Further, in this embodiment, the accommodating cavity includes a rotating cavity formed in the ground electrode 10 and an accommodating groove 301 formed in the fixing member 30, one end of the trigger mechanism 20 is inserted into the rotating cavity, an outer wall of the trigger mechanism 20 abuts against an inner wall of the rotating cavity, and the other end of the trigger mechanism 20 is inserted into the accommodating groove 301; the top end of the ground electrode 10 is provided with an injection hole 101 extending along the central axis direction of the rotating cavity, and the injection hole 101 is communicated with the rotating cavity; the plasma injected from the trigger 20 is injected into the gas gap through the injection hole 101.
Continuing to refer to fig. 3 and 4, specifically, holding tank 301 that extends along the axis direction of rotatory cavity is seted up on mounting 30, holding tank 301 corresponds the setting with rotatory cavity, the first line hole 304 and the second line hole 305 of crossing that extends along the axis direction of rotatory cavity are seted up to mounting 30's bottom, first line hole 304 and the second of crossing is crossed the line hole 305 and is all communicated with holding tank 301, the one end that first wire 40 deviates from trigger mechanism 20 passes first line hole 304 and is connected with external trigger, the one end that second wire 50 deviates from trigger mechanism 20 passes second line hole 305 and is connected with external trigger.
Further, in this embodiment, the fixing member 30 is cylindrical, an air inlet groove 302 extending along the radial direction of the fixing member 30 is formed at the top end of the fixing member 30, and the air inlet groove 302 is communicated with the accommodating cavity; the air inlet groove 302 is used for allowing external insulating gas to flow into the accommodating cavity; by forming the gas inlet groove 302 on the fixing member 30, the insulating gas enters the accommodating chamber through the gas inlet groove 302, thereby enhancing the insulating property of the trigger mechanism 20.
Illustratively, the cross-sectional shape of the fixing member 30 may be circular in cross section in a plane perpendicular to the central axis of the rotating cavity, but of course, the cross-sectional shape of the fixing member 30 may also be rectangular or other polygonal shapes. In the circular realization mode of cross sectional shape at mounting 30, the gas inlet tank 302 is extended to holding tank 301 along the radial of mounting 30 by the periphery wall of mounting 30, and gas inlet tank 302 with hold the chamber intercommunication, the insulating gas of external world passes through gas inlet tank 302 and gets into and hold the intracavity, reinforcing trigger mechanism 20's insulating nature.
In an alternative embodiment, an air inlet hole is formed in the peripheral wall close to the top end of the fixing member 30, the air inlet hole extends to the accommodating groove 301 along the radial direction of the fixing member 30, the air inlet hole is communicated with the accommodating groove 301, and the insulating gas enters the accommodating cavity through the carrying hole.
Furthermore, a plurality of air inlet grooves 302 are formed in the fixing member 30, and the plurality of air inlet grooves 302 are arranged around the fixing member 30 at intervals in the circumferential direction; by providing a plurality of gas inlet slots 302, the velocity of the insulating gas entering the receiving chamber is thereby increased.
With continued reference to fig. 3 and 4, in the present embodiment, the fixing member 30 is provided with three air inlet grooves 302, and the three air inlet grooves 302 are disposed at intervals around the fixing member 30 in the circumferential direction.
Furthermore, a mounting portion 303 is arranged at the bottom end of the fixing member 30, the top end of the mounting portion 303 is connected with the bottom end of the fixing member 30, a first clamping groove 3031 adapted to the first lead wire 40 and a second clamping groove 3032 adapted to the second lead wire 50 are formed in the mounting portion 303, the first clamping groove 3031 and the second clamping groove 3032 both penetrate through the mounting portion 303, one end of the first lead wire 40 extending out of the fixing member 30 penetrates through the first clamping groove 3031 to be connected with an external trigger, and one end of the second lead wire 50 extending out of the fixing member 30 penetrates through the second clamping groove 3032 to be connected with the external trigger; by arranging the first clamping groove 3031 and the second clamping groove 3032 on the mounting portion 303, the first clamping groove 3031 and the second clamping groove 3032 respectively fix the first lead 40 and the second lead 50, and therefore firmness of connection between the first lead 40 and the trigger mechanism 20 and connection between the second lead 50 and the trigger mechanism are improved.
Illustratively, the mounting portion 303 and the fixing member 30 may be integrally formed, and of course, the mounting portion 303 and the fixing member 30 may also be connected by bolts.
With continued reference to fig. 2 to 4, specifically, the mounting portion 303 extends along the central axis direction of the first wire passing hole 304, one side of the mounting portion 303 is provided with a first clamping groove 3031 and a second clamping groove 3032 extending along the central axis direction of the first wire passing hole 304, the first clamping groove 3031 is arranged corresponding to the first wire passing hole 304, the first clamping groove 3031 is communicated with the first wire passing hole 304, the second clamping groove 3032 is arranged corresponding to the second wire passing hole 305, and the second clamping groove 3032 is communicated with the second wire passing hole 305; in the using process, the first conducting wire 40 passes through the first wire passing hole 304 and the first clamping groove 3031 in sequence to be connected with the external trigger, and the second conducting wire 50 passes through the second wire passing hole 305 and the second clamping groove 3032 in sequence to be connected with the external trigger.
Illustratively, the cross-sectional shape of the mounting portion 303 may be semicircular in cross section taken along a plane perpendicular to the central axis of the first wire passing hole 304, and of course, the cross-sectional shape of the mounting portion 303 may also be rectangular.
Referring to fig. 1 and 5, the triggering device 1 provided in this embodiment further includes a pressing plate 60, a first groove 601 adapted to the first lead 40 and a second groove 602 adapted to the second lead 50 are formed in the pressing plate 60, both the first groove 601 and the second groove 602 penetrate through the pressing plate 60, the first groove 601 and the first clamping groove 3031 are correspondingly disposed, the second groove 602 and the second clamping groove 3032 are correspondingly disposed, the pressing plate 60 is covered on one side of the mounting portion 303, the pressing plate 60 is detachably connected to the mounting portion 303, one side of the first lead 40 departing from the first clamping groove 3031 is inserted into the first groove 601, and one side of the second lead 50 departing from the second clamping groove 3032 is inserted into the second groove 602; by providing the pressing plate 60, the pressing plate 60 fixes the first wire 40 and the second wire 50, thereby further improving the firmness of the connection between the first wire 40 and the second wire 50 and the triggering mechanism 20.
For example, the pressing plate 60 and the mounting portion 303 may be connected by a bolt, and of course, the pressing plate 60 and the mounting portion 303 may also be connected by a snap connection. Referring to fig. 5, in an implementation manner that the pressing plate 60 is connected to the mounting portion 303 by bolts, bolt holes 603 are formed in the pressing plate 60, and the bolt holes 603 penetrate through the pressing plate 60; wherein the bolt hole 603 is located between the first groove 601 and the second groove 602; a threaded hole 3033 is formed in the mounting portion 303, and the threaded hole 3033 corresponds to the bolt hole 603; in use, a bolt is passed through the bolt hole 603 to engage the threaded hole 3033.
In this embodiment, the triggering mechanism 20 includes a triggering electrode assembly 201 and a middle electrode assembly 202, the triggering electrode assembly 201 is inserted into the middle electrode assembly 202, one end of the first conducting wire 40 away from the external trigger is connected to the triggering electrode assembly 201, and one end of the second conducting wire 50 away from the external trigger is connected to the middle electrode assembly 202; by arranging the trigger electrode assembly 201 and the middle electrode assembly 202, the trigger mechanism 20 is matched with the ground electrode 10 to realize reliable plasma triggering.
Further, with continued reference to fig. 2, the trigger electrode assembly 201 includes a trigger electrode 2011 and a first insulating member 2012, the first insulating member 2012 is provided with a mounting hole, the trigger electrode 2011 is inserted into the mounting hole, and an outer peripheral wall of the trigger electrode 2011 abuts against an inner peripheral wall of the mounting hole; the top end of the first insulating piece 2012 is provided with an adjusting hole extending along the central axis direction of the mounting hole, the adjusting hole is communicated with the mounting hole, the top end of the trigger electrode 2011 is provided with an adjusting portion 2014, and the adjusting portion 2014 is inserted in the adjusting hole; by changing the length of the adjusting part 2014, the distance from the top end of the first insulating member 2012 to the top end of the adjusting part 2014 is adjusted.
The central axis of the first insulator 2012 is parallel to the central axis of the trigger electrode 2011, and in an implementation manner, the central axis of the first insulator 2012 is collinear with the central axis of the trigger electrode 2011.
Specifically, the adjusting hole between the top end of first insulator 2012 and the top end of adjusting portion 2014 is a primary cavity 2013, that is, the adjusting hole in the remaining portion except the portion where adjusting portion 2014 is inserted into the adjusting hole is a primary cavity 2013.
Wherein, adjusting portion 2014 is rod-shaped, the diameter of adjusting portion 2014 is less than the diameter of trigger electrode 2011, and the outer peripheral wall of adjusting portion 2014 is in butt joint with the inner peripheral wall of the adjusting hole; illustratively, the adjustment portion 2014 and the trigger electrode 2011 may be integrally formed.
In this embodiment, the length of the primary cavity 2013 along the central axis thereof is adjustable, and the length of the primary cavity 2013 is adjusted by adjusting the length of the adjusting part 2014 along the central axis thereof; a large amount of experimental researches are carried out in a collaborative unified research process of the trigger service life and the trigger energy in a laboratory, the processing period of test pieces in the experimental process is greatly saved, and the product research and development period is shortened, so that the universality of the trigger device 1 is improved.
Further, in the present embodiment, the trigger electrode assembly 201 further includes a conducting disc 2015, the conducting disc 2015 is located at the bottom end of the first insulator 2012, and the top end of the conducting disc 2015 abuts against the bottom end of the first insulator 2012; a through hole 2016 extending along the central axis direction of the mounting hole is formed in the conducting disc 2015, the through hole 2016 is communicated with the mounting hole, a threaded rod 2018 is arranged at the bottom end of the trigger electrode 2011, an internal thread matched with the threaded rod 2018 is formed in the through hole 2016, the threaded rod 2018 is connected with the conducting disc 2015 through the through hole 2016, and one end, away from the external trigger, of the first lead 40 is connected with the conducting disc 2015; on one hand, the trigger electrode 2011 is connected with an external trigger through a first lead wire 40 to realize a trigger function; on the other hand, the trigger electrode 2011 is connected with the first lead wire 40 through the conducting disc 2015, so that the welding work efficiency is improved compared with the direct welding of the first lead wire 40 and the trigger electrode 2011.
For example, the threaded rod 2018 and the trigger electrode 2011 may be integrally formed; of course, the threaded rod 2018 and the trigger electrode 2011 may be connected by welding.
Referring to fig. 2 to 4, in the embodiment, the bottom end of the accommodating groove 301 is provided with a fixing groove 306 extending along the central axis direction of the rotating cavity, the fixing groove 306 is communicated with the accommodating groove 301, and the first wire passing hole 304 is communicated with the accommodating groove 301 through the fixing groove 306; the conducting disc 2015 is inserted into the fixing groove 306, the outer peripheral wall of the conducting disc 2015 is abutted to the inner peripheral wall of the fixing groove 306, a welding hole 2017 is formed in the conducting disc 2015, the welding hole 2017 extends along the central axis direction of the rotary cavity, and the welding hole 2017 penetrates through the conducting disc 2015; the welding hole 2017 is arranged corresponding to the first wire passing hole 304, and one end of the first wire 40, which is far away from the external trigger, penetrates through the first wire passing hole 304 and is inserted into the welding hole 2017.
Wherein the first wire 40 is welded with the conductive disc 2015, thereby improving welding efficiency. Illustratively, the conducting disc 2015 can be made of CuCr, and of course, the conducting disc 2015 can also be made of other metal materials, so that the conducting performance can be realized.
With reference to fig. 2, in the present embodiment, the intermediate electrode assembly 202 includes an intermediate electrode 2021 and a second insulating member 2022, the second insulating member 2022 is provided with a fixing hole extending along the central axis direction of the mounting hole, the intermediate electrode 2021 is inserted into the fixing hole, and the outer peripheral wall of the intermediate electrode 2021 abuts against the inner peripheral wall of the fixing hole; the top end of the second insulating member 2022 is provided with a connecting hole extending along the central axis direction of the fixing hole, the connecting hole is communicated with the fixing hole, the middle electrode assembly 202 is provided with a via hole 2024 extending along the central axis direction of the fixing hole, the connecting hole and the via hole 2024 are correspondingly arranged, and the connecting hole is communicated with the via hole 2024; by adjusting the dimensions of the second insulating member 2022 and the fixing member 30, the length of the connection hole in the central axis direction thereof is adjusted.
The connecting hole is a secondary cavity 2023, the length of the secondary cavity 2023 along the central axis thereof is adjustable, and the length of the secondary cavity 2023 is adjusted by adjusting the bottom end of the second insulating member 2022, the top end of the fixing hole and the top end of the fixing member 30; a large amount of experimental researches are carried out in a collaborative unified research process of the trigger service life and the trigger energy in a laboratory, the processing period of test pieces in the experimental process is greatly saved, and the product research and development period is shortened, so that the universality of the trigger device 1 is further improved.
Wherein, the secondary chamber 2023 is disposed corresponding to the injection hole 101, and the secondary chamber 2023 is communicated with the injection hole 101.
The central axis of the second insulator 2022 is parallel to the central axis of the intermediate electrode 2021, and in an achievable manner, the central axis of the second insulator 2022 is disposed collinear to the central axis of the intermediate electrode 2021.
Specifically, the middle electrode 2021 is provided with a blind hole extending along the central axis direction of the via hole 2024, the blind hole is communicated with the via hole 2024, the first insulating member 2012 is inserted into the blind hole, the via hole 2024 is disposed corresponding to the primary cavity 2013, the via hole 2024 is communicated with the primary cavity 2013, and the outer peripheral wall of the first insulating member 2012 is abutted to the inner peripheral wall of the blind hole. The central axis of the intermediate electrode 2021 is parallel to the central axis of the first insulating member 2012, and in an implementation manner, the central axis of the intermediate electrode 2021 is collinear with the central axis of the first insulating member 2012.
It should be noted that the first insulator 2012 is disposed between the trigger electrode 2011 and the intermediate electrode 2021, the second insulator 2022 is disposed between the intermediate electrode 2021 and the ground electrode 10, and the primary cavity 2013 is communicated with the secondary cavity 2023 through the via 2024, so that the primary cavity 2013, the via 2024, and the secondary cavity 2023 together form a conduit. The apertures of the primary cavity 2013, the via 2024, the secondary cavity 2023 and the injection hole 101 are substantially the same, and the central axes of the primary cavity 2013, the via 2024, the secondary cavity 2023 and the injection hole 101 are arranged in a collinear manner.
In order to facilitate the plasma to be sprayed between the main gaps only along a single spraying path, an out-of-tolerance method is adopted among the trigger electrode 2011, the first insulator 2012, the middle electrode 2021, the second insulator 2022 and the ground electrode 10, so that the trigger electrode 2011, the first insulator 2012, the middle electrode 2021, the second insulator 2022 and the ground electrode 10 are reliably pressed, and the spraying efficiency is improved.
It should be noted that the first insulating member 2012 and the second insulating member 2022 both have the properties of ablation resistance and high temperature resistance.
With reference to fig. 2, in the present embodiment, the first insulator 2012, the middle electrode 2021 and the second insulator 2022 are all inverted T-shaped; on the one hand, the connection of the second wire 50 with the intermediate electrode 2021 is facilitated; on the other hand, the insulation distance between the trigger electrode 2011 and the intermediate electrode 2021 is increased.
Illustratively, the cross-sectional shape of the first insulator 2012, the cross-sectional shape of the intermediate electrode 2021, and the cross-sectional shape of the second insulator 2022 are each in a zigzag shape, taking a plane parallel to the central axis of the rotation cavity as a cross-section.
The bottom end of the first insulator 2012 is provided with a first flange 2019 extending outward in the radial direction of the rotating cavity, the bottom end of the middle electrode 2021 is provided with a second flange 2025 extending outward in the radial direction of the rotating cavity, the bottom end of the second insulator 2022 is provided with a third flange 2026 extending outward in the radial direction of the rotating cavity, the second flange 2025 is arranged between the first flange 2019 and the third flange 2026, the top end of the second flange 2025 abuts against the bottom end of the third flange 2026, and the bottom end of the second flange 2025 abuts against the top end of the first flange 2019.
In the above embodiment, the second flange 2025 is provided with the welding hole 2027 extending along the central axis direction of the rotating cavity, the welding hole 2027 penetrates through the second flange 2025, the first flange 2019 is provided with the insertion hole extending along the central axis direction of the rotating cavity, the insertion hole penetrates through the first flange 2019, the welding hole 2027 and the insertion hole are both disposed corresponding to the second wire passing hole 305, and the insertion hole is respectively communicated with the insertion hole and the second wire passing hole 305; in the using process, one end of the second conducting wire 50 departing from the external trigger passes through the second wire passing hole 305 and the jack to be connected with the welding hole 2027, so that the insulation distance between the trigger electrode 2011 and the middle electrode 2021 is increased.
For example, the ground electrode 10, the trigger electrode 2011 and the intermediate electrode 2021 may be made of CuW80, and of course, the ground electrode 10, the trigger electrode 2011 and the intermediate electrode 2021 may be made of other metal materials as long as they have conductive and burning-resistant properties.
The triggering device 1 provided in this embodiment is manufactured according to a two-stage sequential triggering principle.
The working process of the trigger device 1 provided by the invention is as follows: high-voltage pulse is applied between the trigger electrode 2011 and the intermediate electrode 2021, so that the primary cavity 2013 between the trigger electrode 2011 and the intermediate electrode 2021 generates plasma by creeping discharge to ablate high-temperature-resistant insulating materials, the plasma is developed towards the ground electrode 10 continuously in the pipeline and is in short circuit with the secondary cavity 2023 between the intermediate electrode 2021 and the ground electrode 10 to form a spark discharge channel, the discharge channel ablates the inner wall of the pipeline, and then a large amount of high-temperature and high-pressure plasma is generated, the pressure in the pipeline rises sharply and forms a huge pressure difference with the outer shape of the pipeline, the plasma is ejected into an air gap under the action of the huge pressure difference, a large amount of initial charged particles are provided for gap discharge, and meanwhile, the electric field distribution is distorted by the ejected plasma, and therefore the quick conduction of the air gap under the low working coefficient is realized.
In other embodiments, the triggering device 1 described above is used in a controlled self-healing energy dissipater.
Wherein, the primary cavity 2013, the via hole 2024 and the secondary cavity 2023 together form a pipeline, and the diameter range of the pipeline is 1.5mm-2.5 mm. In the above embodiment, the diameter of the pipe is 2 mm.
The triggering device 1 for the gas-triggered gap switch comprises a ground electrode 10, a triggering mechanism 20 and a fixing piece 30; the ground electrode 10 and the fixing member 30 are enclosed together to form an accommodating cavity, the trigger mechanism 20 is accommodated in the accommodating cavity, the top end of the ground electrode 10 is provided with an injection hole 101, the injection hole 101 is communicated with the accommodating cavity, the bottom end of the trigger mechanism 20 is provided with a first lead 40 and a second lead 50, the first lead 40 and the second lead 50 are separated by a preset distance, and the first lead 40 and the second lead 50 both penetrate through the fixing member 30 and are connected with an external trigger; the trigger mechanism 20 comprises a trigger electrode assembly 201 and a middle electrode assembly 202, the trigger electrode assembly 201 is inserted in the middle electrode assembly 202, one end of the first lead wire 40, which is far away from the external trigger, is connected with the trigger electrode assembly 201, and one end of the second lead wire 50, which is far away from the external trigger, is connected with the middle electrode assembly 202; the trigger mechanism 20 is used to inject plasma into the gas gap; the trigger electrode assembly is connected with the first lead, the middle electrode assembly is connected with the second lead, so that the trigger electrode assembly is conveniently connected with the external trigger through the first lead, and the middle electrode assembly is connected with the external trigger through the second lead, and therefore, the work difficulty coefficient is reduced; meanwhile, the triggering mechanism is arranged to spray plasma into the gas gap, so that reliable and long-life triggering of the plasma is realized.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. A trigger device for a gas triggered gap switch, comprising: the grounding electrode comprises a grounding electrode, a triggering mechanism and a fixing piece;
the ground electrode and the fixing piece are enclosed together to form an accommodating cavity, the top end of the ground electrode is provided with an injection hole, the injection hole is communicated with the accommodating cavity, the trigger mechanism is accommodated in the accommodating cavity, the bottom end of the trigger mechanism is provided with a first lead and a second lead, the first lead and the second lead are separated by a preset distance, and the first lead and the second lead both penetrate through the fixing piece to be connected with an external trigger;
the trigger mechanism comprises a trigger electrode assembly and a middle electrode assembly, the trigger electrode assembly is inserted in the middle electrode assembly, one end of the first lead, which is far away from the external trigger, is connected with the trigger electrode assembly, and one end of the second lead, which is far away from the external trigger, is connected with the middle electrode assembly;
the triggering mechanism is used for ejecting plasma into the gas gap.
2. The trigger device for a gas triggered gap switch of claim 1, wherein: the trigger electrode assembly comprises a trigger electrode and a first insulating part, wherein the first insulating part is provided with a mounting hole, the trigger electrode is inserted into the mounting hole, and the outer peripheral wall of the trigger electrode is abutted against the inner peripheral wall of the mounting hole;
the top end of the first insulating part is provided with an adjusting hole extending along the central axis direction of the mounting hole, the adjusting hole is communicated with the mounting hole, the top end of the trigger electrode is provided with an adjusting part, and the adjusting part is inserted in the adjusting hole.
3. The trigger device for a gas triggered gap switch of claim 2, wherein: the trigger electrode assembly further comprises a conducting disc, the conducting disc is located at the bottom end of the first insulating part, and the top end of the conducting disc is abutted against the bottom end of the first insulating part;
set up on the switch-on disc along the through-hole that the axis direction of mounting hole extends, the through-hole with the mounting hole intercommunication, trigger electrode's bottom is provided with the threaded rod, set up in the through-hole with threaded rod assorted internal thread, the threaded rod passes through the through-hole with the switch-on disc is connected, first wire deviates from the one end of external trigger with the switch-on disc is connected.
4. The trigger device for a gas triggered gap switch of claim 2, wherein: the middle electrode assembly comprises a middle electrode and a second insulating part, a fixing hole extending along the central axis direction of the mounting hole is formed in the second insulating part, the middle electrode is inserted into the fixing hole, and the outer peripheral wall of the middle electrode is abutted to the inner peripheral wall of the fixing hole;
the top of second insulating part seted up along the connecting hole that the axis direction of fixed orifices extended, the connecting hole with the fixed orifices intercommunication, middle electrode subassembly is last to be seted up along the via hole that the axis direction of fixed orifices extended, the connecting hole with the via hole corresponds the setting, just the connecting hole with the via hole intercommunication.
5. The trigger device for a gas triggered gap switch of claim 1, wherein: the accommodating cavity comprises a rotating cavity arranged on the ground electrode and an accommodating groove arranged on the fixing piece, one end of the trigger mechanism is inserted into the rotating cavity, the outer wall of the trigger mechanism is abutted against the inner wall of the rotating cavity, and the other end of the trigger mechanism is inserted into the accommodating groove;
the injection hole extends along the axis direction of the rotating cavity, and the injection hole is communicated with the rotating cavity.
6. The trigger device for a gas triggered gap switch according to claim 4, wherein: the first insulating member, the intermediate electrode, and the second insulating member are inverted T-shaped.
7. The trigger device for a gas triggered gap switch of claim 1, wherein: the fixing piece is cylindrical, the top end of the fixing piece is provided with an air inlet groove extending along the radial direction of the fixing piece, and the air inlet groove is communicated with the accommodating cavity;
the air inlet groove is used for allowing external insulating gas to flow into the accommodating cavity.
8. The trigger device for a gas triggered gap switch of claim 7, wherein: the fixing piece is provided with a plurality of air inlet grooves which are arranged at intervals around the circumferential direction of the fixing piece.
9. The trigger device for a gas triggered gap switch of claim 1, wherein: the bottom of mounting is provided with the installation department, the top of installation department with the bottom of mounting is connected, set up on the installation department with the first draw-in groove of first wire looks adaptation and with the second draw-in groove of second wire looks adaptation, first draw-in groove with the second draw-in groove all link up the installation department, first wire stretches out the one end of mounting is passed first draw-in groove with external trigger connects, the second wire stretches out the one end of mounting is passed the second draw-in groove with external trigger connects.
10. The trigger device for a gas triggered gap switch of claim 9, wherein: still include the clamp plate, set up on the clamp plate with the first recess of first wire looks adaptation and with the second recess of second wire looks adaptation, first recess with the second recess all runs through the clamp plate, first recess with first draw-in groove corresponds the setting, the second recess with the second draw-in groove corresponds the setting, the clamp plate lid is established one side of installation department, the clamp plate with the connection can be dismantled to the installation department, first wire deviates from one side of first draw-in groove is inserted and is established in the first recess, the second wire deviates from one side of second draw-in groove is inserted and is established in the second recess.
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| US20090134129A1 (en) * | 2007-11-27 | 2009-05-28 | General Electric Company | Ablative plasma gun apparatus and system |
| CN102545851A (en) * | 2011-12-29 | 2012-07-04 | 华中科技大学 | Bootstrap pulse sharpening gap switch |
| CN203967511U (en) * | 2014-06-27 | 2014-11-26 | 中国人民解放军军械工程学院 | A kind of trigger voltage adjustable gas spark gap trigger switch |
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