CN110913555A - Plasma jet switch - Google Patents
Plasma jet switch Download PDFInfo
- Publication number
- CN110913555A CN110913555A CN201911248561.2A CN201911248561A CN110913555A CN 110913555 A CN110913555 A CN 110913555A CN 201911248561 A CN201911248561 A CN 201911248561A CN 110913555 A CN110913555 A CN 110913555A
- Authority
- CN
- China
- Prior art keywords
- main electrode
- connecting rod
- electrode
- head
- switch
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Spark Plugs (AREA)
- Plasma Technology (AREA)
Abstract
In the plasma jet switch, a shell comprises a first opening and a second opening, a first main electrode is connected with a first connecting rod and is positioned in the shell, a first insulating ring is sleeved in the second opening, a stainless steel cylinder is sleeved with the second opening and is isolated from the shell through the first insulating ring, a second main electrode is connected with the stainless steel cylinder and is positioned in the shell, the second main electrode, which is arranged at a distance from the first main electrode, is provided with an excitation chamber with a nozzle on its side facing away from the first main electrode, the needle electrode is connected to a second connecting rod and is located in the housing, the head part of the needle electrode is wrapped by a second insulating ring in the excitation cavity, the part outside the head part of the needle electrode is wrapped by a second sleeve, the head of the needle electrode, the second insulating ring and the second main electrode wall with the nozzle form an injection cavity, and the second connecting rod receives trigger pulses to enable creeping discharge to be formed in the injection cavity.
Description
Technical Field
The invention relates to the technical field of plasma jet, in particular to a plasma jet switch.
Background
The problems that the starting time of a mechanical switch adopted at present for overcurrent protection of a direct-current power grid is too long, the output impedance of trigger pulses is high, the plasma jet height is low, the conditions of false triggering and false operation are more and the reliability is not high exist in the existing gas switch.
The above information disclosed in this background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not form the prior art that is well known to those of ordinary skill in the art.
Disclosure of Invention
In order to solve the above problems, the present invention provides a plasma spray switch. The purpose of the invention is realized by the following technical scheme. A plasma spray switch includes a first electrode having a first electrode surface,
a housing comprising a first opening and a second opening,
a first sleeve connected to the housing via a first opening,
a first connecting rod disposed in the first casing,
a first main electrode connected to the first connecting rod and located in the housing,
a first insulating ring fitted in the second opening,
a stainless steel cylinder, which is sleeved with the second opening and is isolated from the shell by the first insulating ring,
a second main electrode connected with the stainless steel cylinder and positioned in the shell, wherein the second main electrode arranged opposite to the first main electrode at a distance is provided with an excitation cavity with a nozzle on one side far away from the first main electrode,
a second sleeve wrapped in the stainless steel cylinder,
a second connecting rod provided in the second bushing,
the head of the needle electrode is wrapped by a second insulating ring in the excitation cavity, the part of the needle electrode except the head is wrapped by a second sleeve, the head of the needle electrode, the second insulating ring and the second main electrode wall with the nozzle form an injection cavity, and the second connecting rod receives a trigger pulse to form a creeping discharge in the injection cavity.
In the plasma spray switch, the head of the needle electrode is spaced apart from the nozzle by a predetermined distance to generate a creeping discharge.
In the plasma jet switch, the stainless steel cylinder as a trigger current backflow structure is coaxial with the second connecting rod.
In the plasma jet switch, the shell, the stainless steel cylinder and the second connecting rod are coaxial.
In the plasma jet switch, the excitation cavity comprises a cylindrical groove, a conical groove is arranged at the bottom of the cylindrical groove, and the conical tip of the conical groove is communicated with one side, close to the first main electrode, of the second main electrode.
In the plasma jet switch, the jet chamber is located at the center of the second main electrode.
In the plasma jet switch, the excitation cavity and the jet cavity are of axisymmetric structures and are coaxial with the second connecting rod.
In the plasma jet switch, the needle electrode is made of brass material, the head part is a cone with the diameter of 2mm-5mm, and the included angle of the nozzle is about 90 degrees.
In the plasma jet switch, the diameter of the head of the needle electrode is 7mm, and the diameter of the portion of the needle electrode other than the head is 20 mm.
In the plasma jet switch, the shell is a metal shielding cylinder body, and the shell is provided with air holes.
Compared with the prior art, the invention has the beneficial effects that:
according to the invention, the stainless steel cylinder is used as a trigger current backflow structure and is coaxial with the needle electrode connecting rod, so that the output impedance of trigger pulses is reduced, and the trigger effect is improved. The needle electrode is matched with the plasma jet cavity structure to enable creeping discharge to occur in the gap instead of gap discharge, plasma jet triggering is facilitated, the plasma jet height is higher, a shell is added to form a double-coaxial structure, the shell serves as a metal shielding structure, the influence of surrounding electromagnetic environment and interference on a trigger circuit can be reduced, the triggering reliability is improved, and false triggering and false operation are avoided.
The above description is only an overview of the technical solutions of the present invention, and in order to make the technical means of the present invention more clearly apparent, and to make the implementation of the content of the description possible for those skilled in the art, and to make the above and other objects, features and advantages of the present invention more obvious, the following description is given by way of example of the specific embodiments of the present invention.
Drawings
Various other advantages and benefits of the present invention will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. It is obvious that the drawings described below are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. Also, like parts are designated by like reference numerals throughout the drawings.
In the drawings:
FIG. 1 is a schematic view of a plasma spray switch of the present invention;
FIG. 2 is a schematic view of the excitation chamber of the plasma jet switch of the present invention;
the invention is further explained below with reference to the figures and examples.
Detailed Description
Specific embodiments of the present invention will be described in more detail below with reference to fig. 1 to 2. While specific embodiments of the invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
It should be noted that certain terms are used throughout the description and claims to refer to particular components. As one skilled in the art will appreciate, various names may be used to refer to a component. This specification and claims do not intend to distinguish between components that differ in name but not function. In the following description and in the claims, the terms "include" and "comprise" are used in an open-ended fashion, and thus should be interpreted to mean "include, but not limited to. The description which follows is a preferred embodiment of the invention, but is made for the purpose of illustrating the general principles of the invention and not for the purpose of limiting the scope of the invention. The scope of the present invention is defined by the appended claims.
For the purpose of facilitating understanding of the embodiments of the present invention, the following description will be made by taking specific embodiments as examples with reference to the accompanying drawings, and the drawings are not to be construed as limiting the embodiments of the present invention.
For better understanding, as shown in fig. 1 to 2, a plasma spray switch includes,
a housing 6 comprising a first opening and a second opening,
a first bushing 7 connected to the housing 6 via a first opening,
a first connecting rod 8, which is provided in the first sleeve 7,
a first main electrode 1 connected to said first connecting rod 8 and located in the housing 6,
a first insulating ring 5 fitted in the second opening,
a stainless steel cylinder 4 fitted with a second opening and insulated from the housing 6 by the first insulating ring 5,
a second main electrode 2 connected with the stainless steel cylinder 4 and positioned in the shell 6, wherein the second main electrode 2 arranged opposite to the first main electrode 1 at a distance is provided with an excitation cavity with a nozzle on one side far away from the first main electrode 1,
a second sleeve 9 wrapped in the stainless steel cylinder 4,
a second connecting rod 10, which is arranged in the second sleeve 9,
and a needle electrode which is connected with the second connecting rod 10 and is positioned in the shell 6, the head part of the needle electrode is wrapped by a second insulating ring 12 in the excitation cavity, the part of the needle electrode except the head part is wrapped by a second sleeve 9, the head part of the needle electrode, the second insulating ring 12 and the wall of the second main electrode 2 with the nozzle form an ejection cavity 3, and the second main electrode 2 and the second connecting rod 10 receive a trigger pulse to form a creeping discharge in the ejection cavity 3.
The invention improves the plasma jet trigger gas switch, and can improve the technical performance of the plasma jet trigger gas switch by improving the jet cavity 3 and the reflux structure. The plasma jet switch with the metal fully-closed double coaxial structure is suitable for application occasions needing extremely-low triggering delay gas switches. The reflux structure for improving the trigger pulse current is shown in fig. 1, and the trigger pulse is added to the needle electrode through the needle electrode connecting rod to cause the needle electrode and the second main electrode 2 to generate surface discharge so as to trigger the plasma jet to conduct a switch. The current on the trigger electrode no longer flows back through the large housing 6, but flows back through the stainless steel cylinder 4 which is coaxial with the needle electrode connecting rod as a trigger pulse input structure, so that the output impedance of the trigger pulse is reduced. In order to improve the plasma jet height, the needle electrode head of the plasma jet cavity 3 is designed to be conical and form a certain distance with the nozzle, and the needle electrode insulating ring is tightly wrapped on the part except the needle electrode head, so that creeping discharge instead of gap discharge occurs in the gap. The invention provides a shell 6 as a metal shielding structure, which reduces the influence of the surrounding electromagnetic environment and interference on the trigger circuit.
In a preferred embodiment of the plasma spray switch, the head of the needle electrode is spaced a predetermined distance from the nozzle opening to generate a creeping discharge. The second sleeve 9 completely covers all positions except the head of the needle electrode and is not too far from the nozzle to prevent gap breakdown type discharge. In the preferred embodiment of the plasma spray switch, the stainless steel cylinder 4 as the trigger current return structure is coaxial with the second connecting rod 10.
In the preferred embodiment of the plasma jet switch, the housing 6, the stainless steel cylinder 4 and the second connecting rod 10 are coaxial.
In a preferred embodiment of the plasma jet switch, the excitation chamber includes a cylindrical recess, a bottom of the cylindrical recess is a conical recess, and a conical tip of the conical recess is communicated with a side of the second main electrode 2 close to the first main electrode 1.
In a preferred embodiment of said plasma jet switch, the jet chamber 3 is located in the center of said second main electrode 2.
In the preferred embodiment of the plasma jet switch, the excitation chamber and the jet chamber 3 are both axisymmetric and are coaxial with the second connecting rod 10.
In the preferred embodiment of the plasma jet switch, the needle electrode is made of brass material, the head part is a cone with the diameter of 2mm-5mm, and the included angle of the nozzle is about 90 degrees.
In a preferred embodiment of the plasma spray switch, the diameter of the head of the needle electrode is 7mm, and the diameter of the part of the needle electrode other than the head is 20 mm.
In the preferred embodiment of the plasma jet switch, the housing 6 is a metal shielding cylinder, and the housing 6 is provided with an air hole 11. The shell 6 is tightly attached to the first sleeve 7 and the first insulating ring 5, and plays a role of metal shielding.
In a preferred embodiment of the plasma jet switch, the needle electrode 13 does not directly contact the orifice of the jet chamber 3.
In the preferred embodiment of the plasma jet switch, the needle electrode 13 and the second main electrode 2 are made of brass different from that of the second connecting rod 10, and the first main electrode is made of brass.
Industrial applicability
The plasma jet switch of the invention can be manufactured and used in the field of plasma jet.
The foregoing describes the general principles of the present application in conjunction with specific embodiments, however, it is noted that the advantages, effects, etc. mentioned in the present application are merely examples and are not limiting, and they should not be considered essential to the various embodiments of the present application. Furthermore, the foregoing disclosure of specific details is for the purpose of illustration and description and is not intended to be limiting, since the foregoing disclosure is not intended to be exhaustive or to limit the disclosure to the precise details disclosed.
The foregoing description has been presented for purposes of illustration and description. Furthermore, the description is not intended to limit embodiments of the application to the form disclosed herein. While a number of example aspects and embodiments have been discussed above, those of skill in the art will recognize certain variations, modifications, alterations, additions and sub-combinations thereof.
Claims (10)
1. A plasma spray switch, comprising,
a housing comprising a first opening and a second opening,
a first sleeve connected to the housing via a first opening,
a first connecting rod disposed in the first casing,
a first main electrode connected to the first connecting rod and located in the housing,
a first insulating ring fitted in the second opening,
a stainless steel cylinder, which is sleeved with the second opening and is isolated from the shell by the first insulating ring,
a second main electrode connected with the stainless steel cylinder and positioned in the shell, wherein the second main electrode arranged opposite to the first main electrode at a distance is provided with an excitation cavity with a nozzle on one side far away from the first main electrode,
a second sleeve wrapped in the stainless steel cylinder,
a second connecting rod provided in the second bushing,
the head of the needle electrode is wrapped by a second insulating ring in the excitation cavity, the part of the needle electrode except the head is wrapped by a second sleeve, the head of the needle electrode, the second insulating ring and the second main electrode wall with the nozzle form an injection cavity, and the second connecting rod receives a trigger pulse to form a creeping discharge in the injection cavity.
2. The plasma spray switch of claim 1, wherein preferably the head of the needle electrode is a predetermined distance from the orifice to cause a creeping discharge.
3. The plasma spray switch of claim 1, wherein the stainless steel cylinder as the trigger current return structure is coaxial with the second connection rod.
4. The plasma spray switch of claim 1, wherein the housing, the stainless steel cylinder, and the second connecting rod are all coaxial.
5. The plasma spray switch of claim 1 wherein said excitation chamber includes a cylindrical recess having a bottom conical recess with a conical tip communicating with a side of the second main electrode adjacent the first main electrode.
6. The plasma jet switch of claim 1, wherein the jet chamber is located at the center of the second main electrode.
7. The plasma spray switch of claim 1 wherein the excitation chamber and the spray chamber are each axisymmetric and are each coaxial with the second connecting rod.
8. The plasma spray switch of claim 1, wherein the pin electrode is a brass material, the head is a cone having a diameter of 2mm to 5mm, and the included angle of the orifice is about 90 °.
9. The plasma jet switch of claim 1, wherein the head of the needle electrode has a diameter of 7mm, and a portion other than the head of the needle electrode has a diameter of 20 mm.
10. The plasma spray switch of claim 1 wherein said housing is a metal shielding cylinder, said housing being provided with gas holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911248561.2A CN110913555B (en) | 2019-12-06 | 2019-12-06 | Plasma jet switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911248561.2A CN110913555B (en) | 2019-12-06 | 2019-12-06 | Plasma jet switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110913555A true CN110913555A (en) | 2020-03-24 |
| CN110913555B CN110913555B (en) | 2021-02-26 |
Family
ID=69823874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911248561.2A Active CN110913555B (en) | 2019-12-06 | 2019-12-06 | Plasma jet switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110913555B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111010792A (en) * | 2019-12-06 | 2020-04-14 | 西安交通大学 | Rotary plasma jet trigger device and trigger method |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202856146U (en) * | 2012-10-22 | 2013-04-03 | 云南电力试验研究院（集团）有限公司电力研究院 | Multichannel gas spark switch based on ultraviolet pre-ionization technology |
| CN103296579A (en) * | 2013-05-10 | 2013-09-11 | 华中科技大学 | Surface-breakdown-type vacuum switch trigger electrode |
| CN203377484U (en) * | 2013-07-29 | 2014-01-01 | 杭州瑞利声电技术公司 | High-voltage double-electrode gas electric-spark switch |
| CN104022442A (en) * | 2014-05-26 | 2014-09-03 | 西安交通大学 | Quick-acting bypass switch |
| CN104023461A (en) * | 2014-05-26 | 2014-09-03 | 西安交通大学 | Spark discharge self-excitation jet plasma generating device |
| CN204497566U (en) * | 2015-02-04 | 2015-07-22 | 中国电子科技集团公司第十二研究所 | The pseudospark switch that a kind of creeping discharge triggers |
| CN105405729A (en) * | 2015-11-06 | 2016-03-16 | 许继电源有限公司 | Two-electrode gas switch |
| CN106099644A (en) * | 2016-06-14 | 2016-11-09 | 华中科技大学 | A kind of self breakdown gas switch of high temperature resistant high reliability |
| CN106877175A (en) * | 2015-12-10 | 2017-06-20 | 中国电力科学研究院 | A kind of device suitable for triggered gap |
| CN108736318A (en) * | 2018-05-22 | 2018-11-02 | 西北核技术研究所 | Preionization frizzen and the gas switch for using the frizzen |
| CN110048307A (en) * | 2019-01-24 | 2019-07-23 | 西安交通大学 | Gas switch |
| CN108832602B (en) * | 2018-06-14 | 2019-08-13 | 西北核技术研究所 | A kind of MV grades of pulse gas switch triggering cable protection method and protective device |
-
2019
- 2019-12-06 CN CN201911248561.2A patent/CN110913555B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202856146U (en) * | 2012-10-22 | 2013-04-03 | 云南电力试验研究院（集团）有限公司电力研究院 | Multichannel gas spark switch based on ultraviolet pre-ionization technology |
| CN103296579A (en) * | 2013-05-10 | 2013-09-11 | 华中科技大学 | Surface-breakdown-type vacuum switch trigger electrode |
| CN203377484U (en) * | 2013-07-29 | 2014-01-01 | 杭州瑞利声电技术公司 | High-voltage double-electrode gas electric-spark switch |
| CN104022442A (en) * | 2014-05-26 | 2014-09-03 | 西安交通大学 | Quick-acting bypass switch |
| CN104023461A (en) * | 2014-05-26 | 2014-09-03 | 西安交通大学 | Spark discharge self-excitation jet plasma generating device |
| CN204497566U (en) * | 2015-02-04 | 2015-07-22 | 中国电子科技集团公司第十二研究所 | The pseudospark switch that a kind of creeping discharge triggers |
| CN105405729A (en) * | 2015-11-06 | 2016-03-16 | 许继电源有限公司 | Two-electrode gas switch |
| CN106877175A (en) * | 2015-12-10 | 2017-06-20 | 中国电力科学研究院 | A kind of device suitable for triggered gap |
| CN106099644A (en) * | 2016-06-14 | 2016-11-09 | 华中科技大学 | A kind of self breakdown gas switch of high temperature resistant high reliability |
| CN108736318A (en) * | 2018-05-22 | 2018-11-02 | 西北核技术研究所 | Preionization frizzen and the gas switch for using the frizzen |
| CN108832602B (en) * | 2018-06-14 | 2019-08-13 | 西北核技术研究所 | A kind of MV grades of pulse gas switch triggering cable protection method and protective device |
| CN110048307A (en) * | 2019-01-24 | 2019-07-23 | 西安交通大学 | Gas switch |
Non-Patent Citations (3)
| Title |
|---|
| HU WANG ET AL.: "Research on Erosion Property of Field-Distortion Gas Switch Electrode in Nanosecond Pulse", 《IEEE TRANSACTIONS ON PLASMA SCIENCE》 * |
| LIU XUANDONG ET AL.: "Estimation of Surface Roughness due to Electrode Erosion in Field-Distortion Gas Switch", 《PLASMA SCIENCE AND TECHNOLOGY》 * |
| 刘善红等: "火花放电喷射等离子体触发气体开关导通特性及工作模式分析", 《高电压技术》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111010792A (en) * | 2019-12-06 | 2020-04-14 | 西安交通大学 | Rotary plasma jet trigger device and trigger method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110913555B (en) | 2021-02-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US8528531B2 (en) | Ignition apparatus of plasma jet ignition plug | |
| JP4669486B2 (en) | Plasma jet ignition plug and ignition system thereof | |
| AU2007249192C1 (en) | Composite spark plug | |
| KR101752193B1 (en) | Corona tip insulator | |
| CN101189770B (en) | Encapsulated, pressure-proof, rotationally symmetrical high-power spark gap | |
| JP2008177142A (en) | Plasma type ignition device | |
| US10971902B2 (en) | Spark plug for a high frequency ignition system | |
| EP2171813B1 (en) | Ignition device for internal combustion engine | |
| CN110913555B (en) | Plasma jet switch | |
| JP2011129511A (en) | Hf ignition device | |
| EP2672086A2 (en) | Internal combustion engine | |
| JP2013539903A (en) | RF spark plug short circuit prevention | |
| JP4777463B2 (en) | Plasma jet ignition plug | |
| KR870000984B1 (en) | Igniter utilizing piezo-electric element | |
| CN112443401B (en) | Jet arc-striking type long-distance high-energy plasma igniter | |
| EP2017930A2 (en) | Plasma ignition system | |
| CN110996489B (en) | Plasma spraying device | |
| US7463471B2 (en) | Spark-gap device, particularly high-voltage spark-gap device | |
| GB2063363A (en) | Spark plug for internal combustion engine | |
| AU2019362453B2 (en) | Arrangement for firing spark gaps | |
| EP2424052A2 (en) | Method for igniting air-fuel mixture that fills combustion space provided in combustion vessel of internal combustion engine | |
| JP5217862B2 (en) | Plasma ignition device | |
| US10305259B2 (en) | Car ignition device and ignition accelerator | |
| KR0166644B1 (en) | Pseudo spark switch | |
| JP6044399B2 (en) | Spark plug for internal combustion engine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |