CN102983500A - Gas spark switch for high voltage nanosecond pulse sterilizing system - Google Patents
Gas spark switch for high voltage nanosecond pulse sterilizing system Download PDFInfo
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- CN102983500A CN102983500A CN2012105588171A CN201210558817A CN102983500A CN 102983500 A CN102983500 A CN 102983500A CN 2012105588171 A CN2012105588171 A CN 2012105588171A CN 201210558817 A CN201210558817 A CN 201210558817A CN 102983500 A CN102983500 A CN 102983500A
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- hemispherical head
- nanosecond pulse
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Abstract
The invention discloses a gas spark switch for a high voltage nanosecond pulse sterilizing system, which comprises a discharge main electrode, an anode support, a triggering pin electrode, an insulating layer and a switch housing, wherein the switch housing consists of a rear end cover, a metal casing and an output section housing; the metal casing is fixedly connected with the output section housing by connecting bolts; electrode gap adjusting bolts are arranged on the end cover; the tail end of the triggering pin electrode is fixedly connected with a triggering pin fastener; external threads are formed on the triggering pin fastener; internal threads matched with the external threads are formed on one side of an insulator; and the triggering pin fastener is screwed on the insulator in a threaded manner, so that a distance between the tip of a triggering pin and the main electrode can be adjusted. According to the gas spark switch for the high voltage nanosecond pulse sterilizing system, the gap of the main electrode is small, the spark inductance is smaller, and an electric field distorts acutely in a conducting process of the switch, so that the conducting speed of the switch is high, and the spark resistance is small.
Description
Technical field
The present invention relates to the manufacturing of three electrode coaxial-type gas spark switch, and be applied to the high-voltage nanosecond pulse disinfection system.
Background technology
The impulse electric field sterilization technology is considered to a kind of potential cost-effective non-thermal sterilization means, has become a focus of current research.Discharge switch commonly used is discharge tube in the impulse electric field sterilization equipment now, thus the sterilization impulse wave rise time mostly be Microsecond grade, shorter nanosecond pulse did not also obtain test and used in sterilization technology pulse rise time.The core of high-voltage pulse sterilization is pulse generator, and discharge switch is critical component wherein, and its effect is that the electric energy that storage capacitor is stored is discharged into load at short notice.Storage capacitor through the equivalent electric circuit of spark switch discharge as shown in Figure 1, wherein C is storage capacitor, is charged in advance voltage U
0L is equivalent inductance in the discharge loop; Rs(t) be the equivalent resistance of spark switch; R is load resistance.The below is that circuit equation is described:
As can be seen from the above equation, spark resistance and equivalent inductance are all very large on the impact of discharge, and wherein equivalent inductance comprises spark inductance and structure inductance.
The high-voltage nanosecond pulse disinfection system requires switch to produce and is as short as nanosecond pulse rise time, voltage magnitude reaches tens kilovolts.
Summary of the invention
The objective of the invention is gas spark switch, that main electrode distance is tried one's best is little smaller to guarantee the spark inductance, and electric field distortion is violent and make coaxial-type three electrode gas spark switch that switch conduction speed is fast, spark resistance is little in the switch conduction process.
The gas spark switch that is used for the high-voltage nanosecond pulse disinfection system comprises discharge main electrode, anode carrier, triggering pin electrode, insulating barrier and switch housing; Described discharge main electrode comprises anode hemispherical head and negative electrode hemispherical head, and described anode hemispherical head is fixed on the anode carrier, and anode carrier links to each other with the DC high-voltage power supply input lead with energy capacitance set; Described insulating barrier comprises insulator and capacitive insulation frame, is provided with at least two circular holes in the capacitive insulation frame, is in series with high pressure resistant storage capacitor in the described circular hole, and the negative electrode hemispherical head is fixed on the described insulator, and links to each other with output electrode; Described triggering pin electrode is a metal needle, and needle tip places negative electrode hemispherical head and anode hemispherical head main electrode gap, and the backshank end is fixed on the described triggering pin electrode firmware, triggers the pin electrode tail end and triggers pin firmware integrated connection on described insulator; The insulating barrier outside is fixed with described switch housing.
Switch housing is made of jointly rear end cap, metal case and deferent segment shell, adopts connecting bolt to be fixedly connected with between described metal case and the deferent segment shell, is provided with the electrode spacing adjusting bolt at described end cap.
Be threaded between the described triggering pin electrode tail end and to trigger the pin firmware be an integral body, described integral body and insulator.
Described negative electrode hemispherical head, deferent segment shell and middle insulator consist of the switch deferent segment jointly, adopt tapering transition between the internal diameter of described switch deferent segment and the external diameter, and the transition cone angle is 45 °.
Described insulating layer material is polytetrafluoroethylene.
The negative electrode hemispherical head keeps coaxial with the anode hemispherical head.
Between anode carrier and insulator, be provided with rubber blanket.
Be equipped with O type ring recess on the periphery of described anode carrier and negative electrode hemispherical head.
Beneficial effect: the relative sparkover pipe of gas spark switch of the present invention, tolerating high voltage heavy current, puncture time delay weak point, spark inductance and conducting resistance are little, meet the instructions for use of high-voltage nanosecond pulse disinfection system.
Description of drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is discharge regime circuit equivalent figure;
Have among the figure: 1, rear end cap; 2, connecting bolt; 3, metal case; 4, anode carrier; 5, insulator; 6, valve; 7, deferent segment shell; 8, negative electrode hemispherical head; 9, trigger pin electrode; 10, trigger lead-in wire; 11, anode hemispherical head; 12, rubber blanket; 13, capacitive insulation frame; 14, electrode spacing adjusting bolt; 15, DC high-voltage power supply input lead.
Embodiment
This new gas spark switch is coaxial structure, and switch housing mainly plays shielding external interference and the to external world interference of measuring system of switch, the alloy aluminum of material selection density less.Switch housing is made of jointly rear end cap 1, metal case 3 and deferent segment shell 7, adopt flange form to be fixedly connected with between metal case 3 and the deferent segment shell 7, described insulated part material adopts the high temperature high-pressure resistant material polytetrafluoroethylene of high-quality, by insulator 5 and 13 nested compositions of capacitive insulation frame.
Present embodiment as shown in Figure 1 is equipped with two circular holes in the capacitive insulation frame 13, high pressure resistant energy storage capacitor in series places described two circular hole holes, and described high pressure resistant storage capacitor one end links to each other with anode carrier 4, and the other end links to each other with electrode spacing adjusting bolt 14.Anode carrier 4 and rubber blanket 12 are fixed between insulator 5 and the capacitive insulation frame 13, electrode spacing adjusting bolt 14 can be pushed rubber blanket 12 together inwards with capacitance group and anode carrier 4, thereby play from the effect of switch external fine setting main electrode distance, rubber blanket 12 can bear the deformation of maximum 3mm axial distance.
Anode hemispherical head 11 and negative electrode hemispherical head 8 adopt the stainless steel material of anti-spark eroding, anode hemispherical head 11 1 ends have screw thread to be screwed on the anode carrier 4, and the movement by anode hemispherical head 11 positions can realize that spacing is regulated between anode hemispherical head 11 and the negative electrode hemispherical head 8 in 1 ~ 12mm.
Negative electrode hemispherical head 8 is fixed in insulator 5 inside, keeps coaxial with anode hemispherical head 11.
Trigger pin electrode 9 and place anode hemispherical head 11 and negative electrode hemispherical head 8 centre positions, also comprise and trigger the pin firmware, described triggering pin electrode 9 tail ends are fixedly connected with described triggering pin firmware, has external screw thread on the described triggering pin firmware, one side of described insulator 5 has the internal thread that matches with described triggering pin firmware external screw thread, trigger the pin firmware and adopt the mode of screw thread to be screwed on the insulator 5, trigger needle tip to the distance between main electrode thereby can regulate.
DC high-voltage power supply lead-in wire 15 enters with anode hemispherical head support 4 from switch rear end cap 1 and links to each other.Negative electrode hemispherical head 8, deferent segment shell 7 and middle insulator 5 be common to consist of the switch deferent segments, and switch deferent segment internal-and external diameter changes, for the load matched impedance, adopt the mode of tapering transition, the transition cone angle design is 45 °.
Valve 6 is fixed on the shell 7 of described switch deferent segment, is equipped with O type ring recess on anode carrier 4 and the negative electrode hemispherical head 8, places the air-tightness that O type circle guarantees switch.
The present invention is used for the gas spark switch of high-voltage nanosecond pulse disinfection system, main electrode distance is little, guarantee that the spark inductance is smaller, electric field distortion acutely makes coaxial-type three electrode gas spark switch that switch conduction speed is fast, spark resistance is little in the switch conduction process.
The relative sparkover pipe of gas spark switch of the present invention, tolerating high voltage heavy current, puncture time delay weak point, spark inductance and conducting resistance are little, meet the instructions for use of high-voltage nanosecond pulse disinfection system.
Claims (8)
1. be used for the gas spark switch of high-voltage nanosecond pulse disinfection system, it is characterized in that: comprise discharge main electrode, anode carrier (4), trigger pin electrode (9), insulating barrier and switch housing; Described discharge main electrode comprises anode hemispherical head (11) and negative electrode hemispherical head (8), and described anode hemispherical head (11) is fixed on the anode carrier (4), and anode carrier (4) links to each other with DC high-voltage power supply input lead (15) with energy capacitance set; Described insulating barrier comprises insulator (5) and capacitive insulation frame (13), the capacitive insulation frame is provided with at least two circular holes in (13), be in series with high pressure resistant storage capacitor in the described circular hole, negative electrode hemispherical head (8) is fixed on the described insulator (5), and links to each other with output electrode; Described triggering pin electrode (9) is a metal needle, needle tip places negative electrode hemispherical head (8) and anode hemispherical head (11) main electrode gap, the backshank end is fixed on the described triggering pin electrode firmware, triggers pin electrode (9) tail end and triggers pin firmware integrated connection on described insulator (5); The insulating barrier outside is fixed with described switch housing.
2. the gas spark switch for the high-voltage nanosecond pulse disinfection system according to claim 1, it is characterized in that: switch housing consists of by rear end cap (1), metal case (3) and deferent segment shell (7) are common, adopt connecting bolt (2) to be fixedly connected with between described metal case (3) and the deferent segment shell (7), be provided with electrode spacing adjusting bolt (14) at described end cap (1).
3. the gas spark switch for the high-voltage nanosecond pulse disinfection system according to claim 2 is characterized in that: be threaded between described triggering pin electrode (9) tail end and to trigger the pin firmware be an integral body, described integral body and insulator (5).
4. the gas spark switch for the high-voltage nanosecond pulse disinfection system according to claim 3, it is characterized in that: described negative electrode hemispherical head (8), deferent segment shell (7) and middle insulator (5) consist of the switch deferent segment jointly, adopt tapering transition between the internal diameter of described switch deferent segment and the external diameter, the transition cone angle is 45 °.
5. the gas spark switch for the high-voltage nanosecond pulse disinfection system according to claim 1, it is characterized in that: described insulating layer material is polytetrafluoroethylene.
6. the gas spark switch for the high-voltage nanosecond pulse disinfection system according to claim 1 is characterized in that: negative electrode hemispherical head (8) keeps coaxial with anode hemispherical head (11).
7. the gas spark switch for the high-voltage nanosecond pulse disinfection system according to claim 1 is characterized in that: be provided with rubber blanket (12) between anode carrier (4) and insulator (5).
8. the gas spark switch for the high-voltage nanosecond pulse disinfection system according to claim 1 is characterized in that: be equipped with O type ring recess on the periphery of described anode carrier (4) and negative electrode hemispherical head (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105588171A CN102983500A (en) | 2012-12-20 | 2012-12-20 | Gas spark switch for high voltage nanosecond pulse sterilizing system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012105588171A CN102983500A (en) | 2012-12-20 | 2012-12-20 | Gas spark switch for high voltage nanosecond pulse sterilizing system |
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| Publication Number | Publication Date |
|---|---|
| CN102983500A true CN102983500A (en) | 2013-03-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012105588171A Pending CN102983500A (en) | 2012-12-20 | 2012-12-20 | Gas spark switch for high voltage nanosecond pulse sterilizing system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953470A (en) * | 2015-05-18 | 2015-09-30 | 庄杰 | Gas spark gap switch for nanosecond pulse generator |
| CN105161979A (en) * | 2015-06-26 | 2015-12-16 | 西北核技术研究所 | Multi-level field distortion gas spark switch |
| CN115000814A (en) * | 2022-06-17 | 2022-09-02 | 西北核技术研究所 | Insulating shell for high-power gas switch, forming die and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5465030A (en) * | 1995-01-20 | 1995-11-07 | The United States Of America As Represented By The Secretary Of The Army | Trigger apparatus for spark gap dischargers |
| CN102013635A (en) * | 2010-10-12 | 2011-04-13 | 南京信息工程大学 | Coaxial shield gas spark switch |
| CN203039230U (en) * | 2012-12-20 | 2013-07-03 | 南京信息工程大学 | Gas spark switch for high-pressure nanosecond pulse sterilization system |
-
2012
- 2012-12-20 CN CN2012105588171A patent/CN102983500A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5465030A (en) * | 1995-01-20 | 1995-11-07 | The United States Of America As Represented By The Secretary Of The Army | Trigger apparatus for spark gap dischargers |
| CN102013635A (en) * | 2010-10-12 | 2011-04-13 | 南京信息工程大学 | Coaxial shield gas spark switch |
| CN203039230U (en) * | 2012-12-20 | 2013-07-03 | 南京信息工程大学 | Gas spark switch for high-pressure nanosecond pulse sterilization system |
Non-Patent Citations (1)
| Title |
|---|
| 陈炜峰等: "用于高压纳秒脉冲杀菌系统的气体火花开关研制", 《科学技术与工程》 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104953470A (en) * | 2015-05-18 | 2015-09-30 | 庄杰 | Gas spark gap switch for nanosecond pulse generator |
| CN105161979A (en) * | 2015-06-26 | 2015-12-16 | 西北核技术研究所 | Multi-level field distortion gas spark switch |
| CN105161979B (en) * | 2015-06-26 | 2016-11-30 | 西北核技术研究所 | A kind of multistage field distortion gas spark switch |
| CN115000814A (en) * | 2022-06-17 | 2022-09-02 | 西北核技术研究所 | Insulating shell for high-power gas switch, forming die and preparation method thereof |
| CN115000814B (en) * | 2022-06-17 | 2024-04-30 | 西北核技术研究所 | Insulating shell for high-power gas switch, forming die and preparation method thereof |
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Application publication date: 20130320 |