Gas spark switch insulation protection device based on magnetic confinement

Abstract

Disclosed is a gas spark switch insulation protection device based on magnetic confinement. In the device, insulating sealing cover plates are provided at both ends of a shell to form a sealing structure for accommodating the insulating gas of the switch. A ground electrode is fixed to the center of the insulating sealing cover plate at one end and extends into the shell; a high-voltage electrode is fixed to the center of the insulating sealing cover plate at the other end and extends into the shell and is arranged opposite to the ground electrode, and a through hole is provided inside the high-voltage electrode; a trigger electrode is passed through the through hole to be embedded in the interior of the high-voltage electrode, and an air hole is located on the insulating sealing cover plate to allow the insulating gas of the switch to enter and discharge; a coil is wound around the outside of the insulating sealing cover plate and is connected to an AC source for generating an AC signal in the coil to generate a radial magnetic field inside the shell; the trigger source is connected to the trigger electrode, applies a trigger voltage to the trigger electrode, and triggers the switch to turn on; a repetition frequency controller is connected to the AC source and the trigger source, and controls the trigger frequency of the trigger source and the output frequency of the AC source.

Description

Technical Field

[0001] The invention relates to the technical field of gas spark switches, in particular to a gas spark switch insulation protection device based on magnetic confinement. Background Art

[0002] Gas spark switches offer advantages such as high current flow, simple structure, and easy maintenance. They are key components for achieving electrical power amplification in pulse devices and are widely used in high-power pulse devices. Therefore, developing long-life, stable gas spark switches is crucial for improving the operational stability of pulse power systems.

[0003] When a gas spark switch discharges, the interaction between the arc plasma and the electrode surface causes the electrode material to undergo phase transitions, such as vaporization and liquefaction. This phase-changing electrode material is removed from the electrode surface at a finite rate by the arc's strong electromagnetic field, ultimately adhering to the insulator surface. This degrades the insulator's insulation performance or even causes it to fail, severely impacting the switch's lifespan. Traditional gas spark switch insulators are typically reduced in size by reducing the insulating support housing. However, this approach significantly limits the switch's size and poses significant challenges to the insulator's mechanical properties.

[0004] The 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 already known to a person of ordinary skill in the art. Summary of the Invention

[0005] In view of the deficiencies or defects in the prior art, a gas spark switch insulation protection device based on magnetic confinement is provided, which is used for protecting insulators in a gas spark switch.

[0006] The purpose of the present invention is achieved through the following technical solutions.

[0007] A gas spark switch insulation protection device based on magnetic confinement includes:

[0008] The housing is a metal housing with insulating sealing covers at both ends to form a sealed structure for containing the insulating gas of the switch;

[0009] a ground electrode fixed to the center of the insulating sealing cover at one end and extending toward the inside of the shell;

[0010] A high-voltage electrode is fixed to the center of the insulating sealing cover plate at the other end and extends into the shell and is arranged opposite to the ground electrode. A through hole is provided inside the high-voltage electrode;

[0011] A trigger electrode is provided through the through hole to be embedded in the high voltage electrode.

[0012] Air holes, which are located on the insulating sealing cover plate to allow the switch insulating gas to enter and exhaust;

[0013] a coil wound around the outside of the insulating sealing cover and connected to an AC source for generating an AC signal in the coil to generate a radial magnetic field inside the housing;

[0014] A trigger source is connected to the trigger electrode and applies a trigger voltage to the trigger electrode to turn on the trigger switch;

[0015] The repetitive frequency controller is connected to the AC source and the trigger source to control the trigger frequency of the trigger source and the output frequency of the AC source.

[0016] In the gas spark switch insulation protection device based on magnetic confinement, the frequency of the current signal in the coil is equal to the frequency of the output signal of the trigger source. Each time the switch is triggered, the magnetic field generated by the coil is at a maximum value.

[0017] In the magnetic confinement-based gas spark switch insulation protection device, the trigger source output voltage amplitude is 10-100 kV.

[0018] In the gas spark switch insulation protection device based on magnetic confinement, the coil is a copper coil with a circular cross section. The coil diameter is 3-10 mm, the turn spacing is 10-20 mm, and the number of turns is 5-8.

[0019] In the magnetic confinement-based gas spark switch insulation protection device, the AC source output current is 0-200A and the bandwidth is DC-200Hz.

[0020] In the magnetic confinement-based gas spark switch insulation protection device, the repetition frequency controller controls the repetition frequency of the trigger source output voltage signal to be 1-150 Hz.

[0021] In the gas spark switch insulation protection device based on magnetic confinement, the shell is a cylindrical metal shell, and the insulating sealing cover plate is disc-shaped.

[0022] In the gas spark switch insulation protection device based on magnetic confinement, the ground electrode and the high-voltage electrode are both cylindrical.

[0023] In the gas spark switch insulation protection device based on magnetic confinement, the high-voltage electrode is made of stainless steel, the diameter of the high-voltage electrode is 60 mm, the inner diameter of the through hole is 20 mm, and the trigger electrode is made of stainless steel, the diameter is 10 mm.

[0024] In the magnetic confinement-based gas spark switch insulation protection device, the air hole includes a quick-twist air pipe interface that can be sealably connected to a 6mm hose.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] The present invention winds a copper coil around the insulating sealing cover of a three-electrode gas spark switch. When an AC source is output, an alternating current flows inside the coil, inducing a strong radial magnetic field inside the switch. When the switch electrode material is melted and sputtered, the charged molten electrode material that is sputtered in the radial direction is affected by the strong radial magnetic field, causing its direction to deflect and prevent it from reaching the surface of the insulating sealing cover, ultimately protecting the insulating sealing cover. A repetitive frequency controller is used to control the trigger source trigger frequency and the AC source output frequency, maintaining the current signal frequency in the coil equal to the trigger source output signal frequency, and ensuring that the magnetic field generated by the coil is at its maximum value each time the switch is triggered.

[0027] The above description is only an overview of the technical solution of the present invention. In order to make the technical means of the present invention clearer and easier to understand, so that those skilled in the art can implement it according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are illustrated below. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Various other advantages and benefits of the present invention will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are intended only to illustrate preferred embodiments and are not to be construed as limiting the present invention. It should be understood that the drawings described below are merely examples of the present invention, and that those skilled in the art will be able to derive other drawings from these drawings without inventive effort. Throughout the drawings, identical reference numerals are used to denote identical components.

[0029] In the attached figure:

[0030] Figure 1 Schematic diagram of the structure of a gas spark switch insulation protection device based on magnetic confinement according to an embodiment of the present invention.

[0031] The present invention will be further explained below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0032] Specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although specific embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0033] It should be noted that certain words are used in the specification and claims to refer to specific components. Those skilled in the art should understand that technicians may use different nouns to refer to the same component. This specification and claims do not use the difference in nouns as a way to distinguish components, but use the difference in the functions of the components as the criterion for distinction. As mentioned throughout the specification and claims, "including" or "comprising" is an open term, so it should be interpreted as "including but not limited to". The subsequent description of the specification is a preferred embodiment of the present invention, but the description is based on the general principles of the specification and is not intended to limit the scope of the invention. The scope of protection of the present invention shall be as defined in the attached claims.

[0034] To facilitate understanding of the embodiments of the present invention, several specific embodiments will be further explained below with reference to the accompanying drawings. However, the accompanying drawings do not limit the embodiments of the present invention.

[0035] For better understanding, Figure 1 As shown, a gas spark switch insulation protection device based on magnetic confinement includes:

[0036] The housing 1 is a metal housing 1 with insulating sealing covers 2 at both ends to form a sealed structure for containing the insulating gas of the switch;

[0037] A ground electrode 3 is fixed to the center of the insulating sealing cover plate 2 at one end and extends toward the inside of the housing 1;

[0038] A high-voltage electrode 4 is fixed to the center of the insulating sealing cover plate 2 at the other end and extends into the housing 1 and is arranged opposite to the ground electrode 3. A through hole is provided inside the high-voltage electrode 4;

[0039] The trigger electrode 5 is passed through the through hole to be embedded in the high voltage electrode 4.

[0040] Air holes 6, which are located on the insulating sealing cover plate 2 for introducing and exhausting the switch insulating gas;

[0041] a coil 7 wound around the outside of the insulating sealing cover plate 2 and connected to an AC source 10 for generating an AC signal in the coil 7 to generate a radial magnetic field inside the housing 1;

[0042] A trigger source 8 is connected to the trigger electrode 5 and applies a trigger voltage to the trigger electrode 5 to turn on the trigger switch;

[0043] The repetitive frequency controller 9 is connected to the AC source 10 and the trigger source 8 , and controls the trigger frequency of the trigger source 8 and the output frequency of the AC source 10 .

[0044] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the frequency of the current signal in the coil 7 is equal to the frequency of the output signal of the trigger source 8. Each time the switch is triggered, the magnetic field generated by the coil 7 is at a maximum value.

[0045] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the output voltage amplitude of the trigger source 8 is 10-100 kV.

[0046] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the coil 7 is a copper coil 7 with a circular cross section. The diameter of the coil 7 is 3-10 mm, the turn spacing is 10-20 mm, and the number of turns is 5-8.

[0047] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the output current of the AC source 10 is 0-200A, and the bandwidth is DC-200Hz.

[0048] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the repetition frequency controller 9 controls the trigger source 8 to output a voltage signal with a repetition frequency of 1-150 Hz.

[0049] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the housing 1 is a cylindrical metal housing 1, and the insulating sealing cover plate 2 is disc-shaped.

[0050] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, both the ground electrode 3 and the high-voltage electrode 4 are cylindrical.

[0051] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the high-voltage electrode 4 is made of stainless steel, the diameter of the high-voltage electrode 4 is 60 mm, the inner diameter of the through hole is 20 mm, and the trigger electrode is made of stainless steel, with a diameter of 10 mm.

[0052] In a preferred embodiment of the magnetic confinement-based gas spark switch insulation protection device, the air hole 6 includes a quick-twist air pipe interface that can be sealably connected to a 6 mm hose.

[0053] In one embodiment, a gas spark switch insulation protection device based on magnetic confinement,

[0054] The housing 1 is a cylindrical metal housing with insulating sealing cover plates 2 at both ends.

[0055] The insulating sealing cover plate 2 is disc-shaped and is located at both ends of the shell, and is connected to the ground electrode 3 and the high-voltage electrode 4 respectively.

[0056] The ground electrode 3 is cylindrical and fixed in the center of the insulating sealing cover plate 2 .

[0057] The high voltage electrode 4 is cylindrical with a through hole inside and is fixed in the center of the insulating sealing cover plate 2 .

[0058] The trigger electrode 5 is embedded in the high voltage electrode and is connected to the trigger source to turn on the trigger switch.

[0059] The air hole 6 is located on the insulating sealing cover plate and is used for introducing and exhausting the insulating gas of the switch.

[0060] The coil 7 is wound around the outside of the insulating sealing cover and connected to the AC source to generate a strong radial magnetic field inside the switch.

[0061] The trigger source 8 is connected to the trigger electrode 5 and applies a trigger voltage to the trigger electrode 5 .

[0062] The repetitive frequency controller 9 is connected to the AC source 10 and the trigger source 8 , and controls the trigger frequency of the trigger source 8 and the output frequency of the AC source 10 .

[0063] An AC source 10 , one end of which is connected to the coil 7 and the other end of which is connected to the repetition frequency controller 9 , generates an AC signal in the coil.

[0064] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the shell 1 is made of stainless steel, is cylindrical, has a height of 240 mm, an inner diameter of 200 mm, and a thickness of 30 mm, and has mounting screw holes and rubber sealing rings at both ends to achieve vacuum sealing.

[0065] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the insulating sealing cover plate 2 is made of epoxy resin and has a diameter of 260 mm.

[0066] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the ground electrode 3 is made of stainless steel and has a diameter of 60 mm.

[0067] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the high-voltage electrode 4 is made of stainless steel and has a through hole therein. The diameter of the high-voltage electrode is 60 mm, and the inner diameter of the through hole is 20 mm.

[0068] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the trigger electrode is made of stainless steel and has a diameter of 10 mm.

[0069] In a preferred embodiment of the magnetic confinement-based gas spark switch insulation protection device, the air hole is a quick-twist air pipe interface that can be sealed and connected to a 6mm hose.

[0070] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the coil is a copper coil with a circular cross-section, a diameter of 5 mm, a turn spacing of 20 mm, and 8 turns.

[0071] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the output voltage amplitude of the trigger source is 100 kV.

[0072] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the frequency output by the repetition frequency controller is 100 Hz.

[0073] In a preferred embodiment of the gas spark switch insulation protection device based on magnetic confinement, the AC source output current is 50A and the frequency is 100 Hz.

[0074] In one embodiment, the repetition frequency controller outputs a signal frequency of 1-2000 Hz.

[0075] In one embodiment, a magnetic confinement-based gas spark switch insulation protection device includes a housing 1, an insulating sealing cover plate 2, a ground electrode 3, a high-voltage electrode 4, a trigger electrode 5, an air hole 6, a coil 7, a trigger source 8, a repetition frequency controller 9, and an AC source 10. The housing 1 is cylindrical, with insulating sealing cover plates 2 at both ends. The insulating sealing cover plates 2 are disc-shaped and located at either end of the housing, connected to the ground electrode 3 and the high-voltage electrode 4, respectively. The ground electrode 3 is cylindrical and fixed to the center of the insulating sealing cover plate 2. The high-voltage electrode 4 is cylindrical and has a through hole inside, fixed to the center of the insulating sealing cover plate 2. The trigger electrode 5 is embedded within the high-voltage electrode and connected to the trigger source, triggering the switch to conduct. The air hole 6 is located on the insulating sealing cover plate and is used to allow the switch insulating gas to enter and exit. The coil 7 is wound around the outside of the insulating sealing cover plate 2 and connected to the AC source, generating a strong radial magnetic field within the switch. The trigger source 8 is connected to the trigger electrode 5 and applies a trigger voltage to the trigger electrode 5. The repetitive frequency controller 9 is connected to the AC source 10 and the trigger source 8 to control the trigger frequency of the trigger source 8 and the output frequency of the AC source 10. One end of the AC source 10 is connected to the coil 7 and the other end is connected to the repetitive frequency controller 9 to generate an AC signal in the coil. The present invention generates a strong radial magnetic field inside the switch through the copper coil on the outside of the insulating sealing cover. When the electrode material undergoes a phase change and is removed, the radially sprayed charged electrode material is deflected by the magnetic field and cannot reach the surface of the insulating sealing cover, thereby avoiding the contamination of the insulator by the sputtering of the electrode material, ensuring the insulation level of the insulating sealing cover, and extending the life of the switch. The present invention controls the trigger frequency of the trigger source and the output frequency of the AC source through a repetitive frequency controller. Maintaining the current signal frequency in the coil equal to the output signal frequency of the trigger source, and ensuring that the magnetic field generated by the coil reaches a maximum value each time the switch breaks down, further improves the reliability of the protection device and extends the life of the switch.

[0076] The basic principles of the present application have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, and effects mentioned in this application are merely illustrative and not restrictive, and it should not be assumed that these advantages, strengths, and effects are required of each embodiment of this application. In addition, the specific details disclosed above are merely illustrative and facilitating understanding, and are not restrictive. The above details do not limit this application to necessarily being implemented using the above specific details.

[0077] The above description has been provided for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present application to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A gas spark switch insulation protection device based on magnetic confinement, characterized in that: It includes, The shell has insulating sealing covers at both ends; a ground electrode fixed to the center of the insulating sealing cover at one end and extending toward the inside of the shell; A high-voltage electrode is fixed to the center of the insulating sealing cover at the other end and extends into the shell to be arranged opposite to the ground electrode, and has a through hole inside; A trigger electrode is provided through the through hole to be embedded in the high voltage electrode. Air holes, which are located on the insulating sealing cover plate to allow the switch insulating gas to enter and exhaust; a coil wound around the outside of the insulating sealing cover and connected to an AC source for generating an AC signal in the coil to generate a radial magnetic field inside the housing; a trigger source connected to the trigger electrode; The repetitive frequency controller is connected to the AC source and the trigger source to control the trigger frequency of the trigger source and the output frequency of the AC source.

2. The gas spark switch insulation protection device based on magnetic confinement according to claim 1, characterized in that: The output voltage amplitude of the trigger source is 10-100 kV.

3. The gas spark switch insulation protection device based on magnetic confinement according to claim 1, characterized in that: The coil is a copper coil with a circular cross section. The coil diameter is 3-10 mm, the turn spacing is 10-20 mm, and the number of turns is 5-8.

4. The gas spark switch insulation protection device based on magnetic confinement according to claim 1, characterized in that: The AC source output current is 0-200 A and the bandwidth is DC-200 Hz.

5. The gas spark switch insulation protection device based on magnetic confinement according to claim 1, characterized in that: The repetition frequency controller controls the repetition frequency of the trigger source output voltage signal to be 1-150 Hz.

6. The gas spark switch insulation protection device based on magnetic confinement according to claim 1, characterized in that: The high-voltage electrode is made of stainless steel, with a diameter of 60 mm. The inner diameter of the through hole is 20 mm. The trigger electrode is made of stainless steel, with a diameter of 10 mm.

7. The gas spark switch insulation protection device based on magnetic confinement according to claim 1, characterized in that: The air port includes a quick-twist air hose connection that can be tightly connected to a 6 mm hose.

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