Coaxial gas discharge tube

Abstract

The invention discloses a coaxial gas discharge tube, and particularly relates to the field of gas discharge tubes, the coaxial gas discharge tube comprises an outer conductive electrode, an inner conductive electrode, an upper insulating sheet and a lower insulating sheet, the outer conductive electrode and the inner conductive electrode are both cylindrical, the inner conductive electrode is located inside the outer conductive electrode, the outer conductive electrode and the inner conductive electrode are coaxially arranged, and the upper insulating sheet and the lower insulating sheet are fixed to the two ends of the outer conductive electrode and the two ends of the inner conductive electrode respectively, so that the outer conductive electrode, the inner conductive electrode, the upper insulating sheet and the lower insulating sheet form a closed space. According to the coaxial gas discharge tube, the structure of the inner and outer coaxial conductive electrodes is adopted, so that a larger discharge electrode end face can be obtained under the same volume; meanwhile, the size adjustment of the internal closed space and the size adjustment of the discharge electrode are more flexible, the adjustment of the action voltage is facilitated, and higher surge current conduction capability can be obtained under the condition of small size.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of gas discharge tube, more particularly, the present application relates to coaxial gas discharge tube. BACKGROUND

[0002] The gas discharge tube is a lightning surge protection device commonly used in power and electronic systems, and its surge impact characteristics directly affect the protection effect. When the voltage across the gas discharge tube is less than the breakdown voltage of the gas, the inert gas inside will not be broken down, and it can be considered that the circuit is broken at this time. When the voltage across the discharge tube is greater than the breakdown voltage, the gas between the two gaps is ionized due to high voltage, the discharge tube is broken down, and the high insulation resistance state is converted to a low resistance conduction state, which leads to a large current into the ground, thereby protecting the downstream equipment from damage caused by surges.

[0003] The existing gas discharge tube is formed by welding the annular insulating shell with the conductive electrodes at both ends by soldering to form a sealed space, and the sealed space is filled with inert gas. The end faces of the center protruding ends of the two conductive electrodes are opposite to each other, forming a main discharge gap. This structure needs to increase the end face area in order to obtain large current-carrying capacity, thereby increasing the overall volume of the discharge tube, which cannot achieve high current-carrying capacity in a small volume. SUMMARY

[0004] The coaxial gas discharge tube provided by the present application solves the problem that the existing gas discharge tube cannot achieve high current-carrying capacity in a small volume.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical scheme: a coaxial gas discharge tube, comprising an outer conductive electrode, an inner conductive electrode, and an upper insulating sheet and a lower insulating sheet, the outer conductive electrode and the inner conductive electrode are both cylindrical, the inner conductive electrode is located inside the outer conductive electrode, and the outer conductive electrode and the inner conductive electrode are coaxially arranged, the upper insulating sheet and the lower insulating sheet are respectively fixed to the two ends of the outer conductive electrode and the inner conductive electrode, so that the outer conductive electrode, the inner conductive electrode, the upper insulating sheet and the lower insulating sheet form a sealed space, and the sealed space is filled with hydrogen and / or inert gas; the middle part of the inner surface of the outer conductive electrode has a convex circular truncated cone one, the convex circular truncated cone one forms an outer discharge electrode, the middle part of the outer surface of the inner conductive electrode has a convex circular truncated cone two, the convex circular truncated cone two forms an inner discharge electrode, and the gap between the cylindrical surface of the inner discharge electrode and the cylindrical surface of the outer discharge electrode is annular.

[0006] In a preferred embodiment, the middle part of the inner conductive electrode is a hollow structure or a pin lead-out structure. When the middle part of the inner conductive electrode is a pin lead-out structure, the pin lead-out structure extends outward from both ends of the inner conductive electrode.

[0007] In a preferred embodiment, the inner discharge electrode and the outer discharge electrode are both continuous or discontinuous circular truncated cones, when the inner discharge electrode and the outer discharge electrode are both discontinuous circular truncated cones, the number of discontinuous circular truncated cones of the inner discharge electrode and the outer discharge electrode are equal, and the discontinuous circular truncated cones of the inner discharge electrode and the outer discharge electrode are arranged one by one in a face-to-face manner.

[0008] In a preferred embodiment, the number of the inner discharge electrodes and the outer discharge electrodes are equal, and the number of the inner discharge electrodes and the outer discharge electrodes is one or more.

[0009] In a preferred embodiment, the cylindrical surface of the inner discharge electrode and the cylindrical surface of the outer discharge electrode are smooth, or the cylindrical surface of the inner discharge electrode and the cylindrical surface of the outer discharge electrode are both arranged with convex points, so that the cylindrical surface of the inner discharge electrode and the cylindrical surface of the outer discharge electrode form irregular shapes.

[0010] In a preferred embodiment, the inner discharge electrode and the outer discharge electrode are coaxially arranged.

[0011] In a preferred embodiment, the coaxial gas discharge tube further comprises a sealing structure, the sealing structure comprises a receiving component and a plugging component, when the upper insulating sheet and the lower insulating sheet are installed at the end of the outer conductive electrode and the inner conductive electrode, the side of the outer conductive electrode and the inner conductive electrode adjacent to the upper insulating sheet or the lower insulating sheet is a receiving side, the side of the upper insulating sheet and the lower insulating sheet adjacent to the outer conductive electrode or the inner conductive electrode is a plugging side, the receiving component is installed on the receiving side, and the plugging component is installed on the plugging side.

[0012] In a preferred embodiment, the receiving component comprises a first fixed ring and an inner hook, the first fixed ring is fixedly installed on the receiving side, and the inner hook is fixed on the first fixed ring, and the end of the inner hook has a first hook portion.

[0013] In a preferred embodiment, the plugging component comprises a second fixed ring and an outer hook, the second fixed ring is fixedly installed on the plugging side, and the outer hook is fixed on the second fixed ring, and the end of the outer hook has a second hook portion, and when the plugging component is inserted into the receiving component, the second hook portion is hooked outside the first hook portion.

[0014] In a preferred embodiment, the receiving component further comprises a plurality of elastic sheets arranged in the circumferential direction of the surface of the first fixed ring, and when the plugging component is inserted into the receiving component, the elastic sheets are supported at the bottom of the outer hook.

[0015] The technical effects and advantages of the present application: the coaxial gas discharge tube of the present application adopts the structure of inner and outer coaxial conductive electrodes, which can obtain larger discharge electrode end surface under the same volume; at the same time, the size adjustment of the internal closed space and the discharge electrode is more flexible, which is beneficial to the adjustment of the operating voltage, and at the same time, higher surge current conduction capacity can be obtained under small volume; the coaxial structure also makes the installation form of the discharge tube more diversified, which can be used in more narrow space, and brings excellent surge protection ability to the circuit. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a perspective view of the embodiment one of the present application.

[0017] Figure 2 It is a structural schematic view of the embodiment one of the present application.

[0018] Figure 3 It is a structural schematic view of the embodiment two of the present application.

[0019] Figure 4 It is a structural schematic view of the embodiment three of the present application.

[0020] Figure 5 It is a structural schematic view of the embodiment four of the present application.

[0021] Figure 6 It is a structural schematic view of the embodiment five of the present application.

[0022] Figure 7 It is a structural schematic view of the embodiment six of the present application.

[0023] Figure 8 It is a structural schematic view of the embodiment seven of the present application.

[0024] Figure 9 It is a structural schematic view of the embodiment eight of the present application.

[0025] Figure 10 It is a schematic view of the sealing structure installed in the structure of the embodiment one of the present application.

[0026] Figure 11 It is a partial structural schematic view of the present application. Figure 10

[0027] Figure 12 It is a schematic view of the sealing structure installed in the structure of the embodiment six of the present application.

[0028] Figure 13 It is a schematic view of the sealing structure installed in the structure of the embodiment seven of the present application.

[0029] Figure 14 It is an explosion view of the sealing structure of the present application. ​

[0030] The reference signs are: 1, outer conductive electrode; 2, inner conductive electrode; 21, hollow structure; 22, pin leading-out structure; 3, inner discharge electrode; 4, outer discharge electrode; 5, upper insulating sheet; 6, lower insulating sheet; 7, bump; 8, sealing structure; 81, fixing ring one; 82, inner hook; 821, hook part one; 83, fixing ring two; 84, outer hook; 841, hook part two; 85, elastic sheet; 9, closed space. DETAILED DESCRIPTION

[0031] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0032] The accompanying drawings referred to in the description are incorporated herein and constitute a part of the description. Figures 1-9 The coaxial gas discharge tube comprises an outer conductive electrode 1, an inner conductive electrode 2, and an upper insulating sheet 5 and a lower insulating sheet 6. The outer conductive electrode 1 and the inner conductive electrode 2 are both cylindrical. The inner conductive electrode 2 is located inside the outer conductive electrode 1, and the outer conductive electrode 1 and the inner conductive electrode 2 are coaxially arranged. The upper insulating sheet 5 and the lower insulating sheet 6 are respectively fixed to the two ends of the outer conductive electrode 1 and the inner conductive electrode 2, so that the outer conductive electrode 1, the inner conductive electrode 2, the upper insulating sheet 5 and the lower insulating sheet 6 form a closed space 9. The closed space 9 is filled with hydrogen and / or inert gas. The middle part of the inner surface of the outer conductive electrode 1 has a convex circular truncated cone one, which forms an outer discharge electrode 4. The middle part of the outer surface of the inner conductive electrode 2 has a convex circular truncated cone two, which forms an inner discharge electrode 3. The inner discharge electrode 3 and the outer discharge electrode 4 are coaxially arranged, so that the gap between the cylindrical surface of the inner discharge electrode 3 and the cylindrical surface of the outer discharge electrode 4 is annular.

[0033] When the voltage between the outer conductive electrode 1 and the inner conductive electrode 2 is less than the breakdown voltage of the gas, the inert gas in the closed space 9 will not be broken down, and the gas discharge tube presents a high impedance state. At this time, it can be considered that it is open circuit. When the voltage between the two ends of the discharge tube is greater than the breakdown voltage, the inner discharge electrode 3 and the outer discharge electrode 4 discharge, the discharge tube is broken down, and the gas discharge tube presents a conducting state. At this time, it can be considered that it is short circuit, and a large current can be led into the ground, thereby protecting the rear-end equipment from damage by surges.

[0034] This coaxial gas discharge tube adopts a structure of inner and outer coaxial conductive electrodes, which can obtain a larger discharge electrode end surface under the same volume. At the same time, the size adjustment of the internal enclosed space 9 and the discharge electrode is more flexible, which is conducive to adjusting the operating voltage. At the same time, it can obtain a higher surge current conducting capacity in a small volume. The coaxial structure also makes the installation form of the discharge tube more diversified, and can be used in a smaller space, providing excellent surge protection capabilities for the circuit.

[0035] In addition, the gap between the cylindrical surface of the inner discharge electrode 3 and the cylindrical surface of the outer discharge electrode 4 is annular. This has the advantage that when the cylindrical surfaces of the inner discharge electrode 3 and the outer discharge electrode 4 discharge, the discharge occurs within the entire annular area. The entire cylindrical surface can discharge, and the discharge area is larger, which makes the coaxial gas discharge tube have a stronger protective effect.

[0036] Example 1: Figure 2 As shown, in this embodiment, the middle portion of the inner conductive electrode 2 is a hollow structure 21 . The hollow structure 21 is a circular hole, and the axis of the circular hole is also coaxial with the outer conductive electrode 1 and the inner conductive electrode 2 .

[0037] Example 2: Figure 3 As shown, in this embodiment, the middle portion of the inner conductive electrode 2 is a lead-out structure 22. When the middle portion of the inner conductive electrode 2 is the lead-out structure 22, the lead-out structure 22 extends outward from both ends of the inner conductive electrode 2. The lead-out structures 22 extending to both ends are also coaxial with the outer conductive electrode 1 and the inner conductive electrode 2, and the lead-out structure 22 can be conveniently used for connecting wires.

[0038] Example 3: Figure 4 As shown, in this embodiment, the number of the inner discharge electrodes 3 and the outer discharge electrodes 4 are equal, and the number of the inner discharge electrodes 3 and the outer discharge electrodes 4 is one or more. It should be noted that, Figure 4 In the embodiment, three inner discharge electrodes 3 and three outer discharge electrodes 4 are provided. The number is not limited to one or three and can be two, four, five, six, or so on. The distance between adjacent inner discharge electrodes 3 or adjacent outer discharge electrodes 4 is equal, so that each inner discharge electrode 3 and each outer discharge electrode 4 have a one-to-one correspondence. By providing multiple inner discharge electrodes 3 and multiple outer discharge electrodes 4, the discharge area can be increased without changing the size of the coaxial gas discharge tube, thereby achieving a greater current carrying capacity. In other words, in this embodiment, the discharge area is increased by changing the number of inner discharge electrodes 3 and outer discharge electrodes 4.

[0039] Example 4: Figure 5As shown in the embodiment, the discharge area is increased by changing the width of the inner discharge electrode 3 and the outer discharge electrode 4 to obtain greater current passing capacity and to improve the electrical characteristics of the discharge tube.

[0040] Embodiment five: as shown in the figure, Figure 6 As shown in the embodiment, the cylindrical surface of the inner discharge electrode 3 and the cylindrical surface of the outer discharge electrode 4 are both arranged with convex points 7, so that the cylindrical surface of the inner discharge electrode 3 and the cylindrical surface of the outer discharge electrode 4 form irregular shapes. This makes it easier to discharge between the two end surfaces. It should be noted that the cylindrical surface of the inner discharge electrode 3 and the cylindrical surface of the outer discharge electrode 4 are not limited to irregular shapes, but can also be smooth, i.e. smooth cylindrical surfaces.

[0041] Embodiment six: as shown in the figure, Figure 7 As shown in the embodiment, the width of the outer conductive electrode 1 is shorter than that of the inner conductive electrode 2, specifically the length of the outer conductive electrode 1 at both ends of the outer discharge electrode 4 is shorter than that of the inner conductive electrode 2 at both ends. At this time, the upper and lower insulating sheets 5 and 6 are both cylindrical, that is, the edges of the upper and lower insulating sheets 5 and 6 extend to the ends of the outer conductive electrode 1 to be able to be fixed with the outer conductive electrode 1.

[0042] Embodiment seven: as shown in the figure, Figure 8 As shown in the embodiment, the outer conductive electrode 1 and the inner conductive electrode 2 are coaxially staggered, specifically, the inner discharge electrode 3 and the outer discharge electrode 4 still maintain the aligned state, the upper end of the outer conductive electrode 1 is cut off at the position of the outer discharge electrode 4, and the lower end of the inner conductive electrode 2 is cut off at the position of the inner discharge electrode 3, thereby forming a coaxial staggered structure, and the shapes of the corresponding upper and lower insulating sheets 5 and 6 are also changed accordingly. The edge of the upper insulating sheet 5 extends downward to be able to be fixed with the outer conductive electrode 1, and the middle part of the lower insulating sheet 6 extends upward to be able to be fixed with the inner discharge electrode 3.

[0043] Embodiment eight: as shown in the figure, Figure 9 As shown in the embodiment, the inner discharge electrode 3 and the outer discharge electrode 4 are both continuous or discontinuous circular truncated cones. When the inner discharge electrode 3 and the outer discharge electrode 4 are both discontinuous circular truncated cones, the number of discontinuous circular truncated cones of the inner discharge electrode 3 and the outer discharge electrode 4 is equal, and the discontinuous circular truncated cones of the inner discharge electrode 3 and the outer discharge electrode 4 are arranged one by one in opposition. It should be noted that the continuous circular truncated cone is a ring structure, and the discontinuous circular truncated cone is a discontinuous circular truncated cone formed by uniformly opening some notches on the basis of the continuous circular truncated cone.

[0044] In the embodiment nine, the upper insulating sheet 5 and the lower insulating sheet 6 are welded by brazing. During brazing, the brazing filler is melted by adding liquid, and then enters the gap between the upper insulating sheet 5, the lower insulating sheet 6 and the outer conductive electrode 1 and the inner conductive electrode 2 by capillary action, so as to achieve the purpose of welding. However, during the welding heating, the gas in the closed space 9 expands and the pressure increases, which is easy to leak from the gap during the welding process. After the welding is completed and cooled, the internal pressure decreases, the discharge stability is poor, and the discharge performance of the gas discharge tube is affected. Therefore, the coaxial gas discharge tube is improved as follows.

[0045] Specifically, the coaxial gas discharge tube further comprises a sealing structure 8, the sealing structure 8 comprises a receiving part and a plug-in part. When the upper insulating sheet 5 and the lower insulating sheet 6 are installed at the end of the outer conductive electrode 1 and the inner conductive electrode 2, the side of the outer conductive electrode 1 and the inner conductive electrode 2 adjacent to the upper insulating sheet 5 or the lower insulating sheet 6 is the receiving surface, and the side of the upper insulating sheet 5 and the lower insulating sheet 6 adjacent to the outer conductive electrode 1 or the inner conductive electrode 2 is the plug-in surface. The receiving part is installed on the receiving surface, and the plug-in part is installed on the plug-in surface.

[0046] It should be noted that, as shown in Figures 2-6 and Figure 9 , for the embodiment one, the embodiment two, the embodiment three, the embodiment four, the embodiment five and the embodiment eight, at the installation position of the upper insulating sheet 5 and the outer conductive electrode 1 and the inner conductive electrode 2, and at the installation position of the lower insulating sheet 6 and the outer conductive electrode 1 and the inner conductive electrode 2, the receiving surface is the cylindrical surface of the outer conductive electrode 1 and the inner conductive electrode 2, and the plug-in surface is the plane of the side of the upper insulating sheet 5 inside the closed space 9 and the plane of the side of the lower insulating sheet 6 inside the closed space 9.

[0047] As shown in Figure 7 , for the embodiment six, at the installation position of the upper insulating sheet 5 and the outer conductive electrode 1 and the inner conductive electrode 2, and at the installation position of the lower insulating sheet 6 and the outer conductive electrode 1 and the inner conductive electrode 2, the receiving surface is the cylindrical surface of the outer conductive electrode 1 and the inner conductive electrode 2, and the plug-in surface is the cylindrical surface inside the upper insulating sheet 5 and the lower insulating sheet 6 and the plane inside the upper insulating sheet 5 and the lower insulating sheet 6.

[0048] As shown in Figure 8 , for the embodiment seven, at the installation position of the upper insulating sheet 5 and the outer conductive electrode 1, and at the installation position of the lower insulating sheet 6 and the inner conductive electrode 2, the receiving surface is the upper end surface of the outer conductive electrode 1 and the lower end surface of the inner conductive electrode 2, and the plug-in surface is the cylindrical surface inside the upper insulating sheet 5 and the lower insulating sheet 6. At the installation position of the upper insulating sheet 5 and the inner conductive electrode 2, and at the installation position of the lower insulating sheet 6 and the outer conductive electrode 1, the receiving surface is the cylindrical surface of the inner conductive electrode 2 and the cylindrical surface of the outer conductive electrode 1, and the plug-in surface is the plane inside the upper insulating sheet 5 and the plane inside the lower insulating sheet 6.

[0049] like Figures 10-14 As shown, the receiving component includes a fixing ring 81 and an inner hook 82. The fixing ring 81 is fixedly mounted on the receiving surface, and the inner hook 82 is fixed to the fixing ring 81. The end of the inner hook 82 has a hook portion 821. The plug-in component includes a fixing ring 83 and an outer hook 84. The fixing ring 83 is fixedly mounted on the plug-in surface, and the outer hook 84 is fixed to the fixing ring 83. The end of the outer hook 84 has a hook portion 841. When the plug-in component is inserted into the receiving component, the hook portion 841 hooks onto the outer side of the hook portion 821. The hook portion 841 is tapered, and the end of the inner hook 82 near the outer hook 84 narrows inward. The fixing ring 81, inner hook 82, fixing ring 83, and outer hook 84 are all annular structures.

[0050] When installing the upper insulating sheet 5 and the lower insulating sheet 6, the upper insulating sheet 5 and the lower insulating sheet 6 are butted against the ends of the outer conductive electrode 1 and the inner conductive electrode 2. Figure 11 As shown, outer hook 84 presses hook portion 1 821 downward, causing hook portion 1 821 to elastically deform inward, thereby allowing hook portion 2 841 to hook within hook portion 1 821. To ensure a tight connection between hook portion 1 821 and hook portion 2 841, several spring clips 85 are provided circumferentially on the surface of retaining ring 1 81. When the plug-in component is inserted into the receiving component, the spring clips 85 support the bottom of outer hook 84. Consequently, after the outer hook 84 is inserted, the spring clips 85 push the outer hook 84 upward, tightly entwining hook portion 2 841 and hook portion 1 821. During welding, the gas within enclosed space 9 expands, pushing against the upper and lower insulating sheets 5 and 6. Under this force, hook portion 1 821 and hook portion 2 841 become increasingly tighter, increasing the compressive force. This prevents gas leakage through the gap, thereby ensuring the discharge performance of the gas discharge tube.

[0051] It should be noted that before the first hook 821 and the second hook 841 are connected, a sealant can be applied to the inside of the second hook 841 so that when the second hook 841 and the first hook 821 are hooked together, the sealant can be used to improve the sealing performance. The sealant can be polyurethane sealant or epoxy resin sealant.

[0052] It should be noted that when the plug-in surface is a cylindrical surface, the inner hook 82 is installed on the side wall of the cylindrical surface, and the end of the outer hook 84 away from the second hook portion 841 is bent outward to be fixed with the second fixing ring 83.

[0053] It is also important to note that Figure 10 Therefore Figure 2 Taking the first embodiment as an example, the installation of the sealing structure 8 in the first, second, third, fourth, fifth and eighth embodiments is described. Figure 12 This is an example of the installation of the sealing structure 8 in the sixth embodiment.Figure 13 is an example of the installation of the sealing structure 8 in Example Seven.

[0054] Finally: the above only is the preferred embodiment of the present application, and is not used to limit the present application, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application, should be included in the protection scope of the present application.

Claims

1. Coaxial gas discharge tube, characterized by: The invention comprises an outer conductive electrode (1), an inner conductive electrode (2), an upper insulating sheet (5), and a lower insulating sheet (6), wherein the outer conductive electrode (1) and the inner conductive electrode (2) are both cylindrical, the inner conductive electrode (2) is located inside the outer conductive electrode (1), and the outer conductive electrode (1) and the inner conductive electrode (2) are coaxially arranged, and the upper insulating sheet (5) and the lower insulating sheet (6) are respectively fixed to the two ends of the outer conductive electrode (1) and the inner conductive electrode (2), so that the outer conductive electrode (1), the inner conductive electrode (2), the upper insulating sheet (5), and the lower insulating sheet (6) form a closed space (9), and the closed space (9) is filled with hydrogen and / or an inert gas; The middle portion of the inner surface of the outer conductive electrode (1) has a raised cone 1, which forms an outer discharge electrode (4); the middle portion of the outer surface of the inner conductive electrode (2) has a raised cone 2, which forms an inner discharge electrode (3); and the gap between the cylindrical surface of the inner discharge electrode (3) and the cylindrical surface of the outer discharge electrode (4) is in the shape of a circular ring.

2. The coaxial gas discharge tube according to claim 1, wherein: The middle portion of the inner conductive electrode (2) is a hollow structure (21) or a pin lead structure (22). When the middle portion of the inner conductive electrode (2) is the pin lead structure (22), the pin lead structure (22) extends outward from both ends of the inner conductive electrode (2).

3. The coaxial gas discharge tube according to claim 1, wherein: The inner discharge electrode (3) and the outer discharge electrode (4) are both continuous frustums or discontinuous frustums. When the inner discharge electrode (3) and the outer discharge electrode (4) are both discontinuous frustums, the number of discontinuous frustums of the inner discharge electrode (3) and the number of discontinuous frustums of the outer discharge electrode (4) are equal, and the discontinuous frustums of the inner discharge electrode (3) and the discontinuous frustums of the outer discharge electrode (4) are arranged one by one in direct opposition.

4. The coaxial gas discharge tube according to claim 1, wherein: The number of the inner discharge electrodes (3) and the number of the outer discharge electrodes (4) are equal, and the number of the inner discharge electrodes (3) and the number of the outer discharge electrodes (4) are one or more.

5. The coaxial gas discharge tube according to claim 1, wherein: The cylindrical surface of the inner discharge electrode (3) and the cylindrical surface of the outer discharge electrode (4) are smooth surfaces, or the cylindrical surface of the inner discharge electrode (3) and the cylindrical surface of the outer discharge electrode (4) are both provided with convex points (7), so that the cylindrical surface of the inner discharge electrode (3) and the cylindrical surface of the outer discharge electrode (4) form an irregular shape.

6. The coaxial gas discharge tube according to claim 1, wherein: The inner discharge electrode (3) and the outer discharge electrode (4) are coaxially arranged.

7. The coaxial gas discharge tube according to claim 1, wherein: The coaxial gas discharge tube further comprises a sealing structure (8), wherein the sealing structure (8) comprises a receiving component and a plug-in component. When the upper insulating sheet (5) and the lower insulating sheet (6) are mounted on the ends of the outer conductive electrode (1) and the inner conductive electrode (2), the side of the outer conductive electrode (1) and the inner conductive electrode (2) adjacent to the upper insulating sheet (5) or the lower insulating sheet (6) is a receiving surface, and the side of the upper insulating sheet (5) and the lower insulating sheet (6) adjacent to the outer conductive electrode (1) or the inner conductive electrode (2) is a plug-in surface. The receiving component is mounted on the receiving surface, and the plug-in component is mounted on the plug-in surface.

8. The coaxial gas discharge tube according to claim 7, wherein: The receiving component comprises a fixing ring (81) and an inner hook (82), wherein the fixing ring (81) is fixedly mounted on the receiving surface, and the inner hook (82) is fixed on the fixing ring (81), and the end of the inner hook (82) has a hook portion (821).

9. The coaxial gas discharge tube according to claim 8, wherein: The plug-in component comprises a second fixing ring (83) and an outer hook (84), wherein the second fixing ring (83) is fixedly mounted on the plug-in surface, and the outer hook (84) is fixed on the second fixing ring (83). The end of the outer hook (84) has a second hook portion (841), and when the plug-in component is inserted into the receiving component, the second hook portion (841) is hooked on the outside of the first hook portion (821).

10. The coaxial gas discharge tube according to claim 9, wherein: The receiving component further comprises a plurality of spring pieces (85) arranged in the circumferential direction of the surface of the fixing ring (81). When the plug-in component is inserted into the receiving component, the spring pieces (85) are supported on the bottom of the outer hook (84).

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