A gas spark switch for electrode material ablation testing

Abstract

The present invention relates to a gas switch, and more specifically, to a gas spark switch for testing ablation of small-sample electrode materials. The switch addresses the technical issues of existing gas switches, such as a large electrode structure, high difficulty in preparation, inconvenience in development and replacement, and low weighing accuracy. The switch comprises an insulating housing, an electrode assembly, a fixing assembly, and a pair of cover plates. The electrode assembly is disposed on opposite inner walls of the insulating housing. The fixing assembly is disposed on opposite outer walls of the insulating housing. The pair of cover plates are respectively disposed on two ports of the insulating housing. The electrode assembly comprises a pair of electrode bases and a pair of electrode needles. The electrode needles are cylindrical in structure, and opposite ends of the pair of electrode needles are both hemispherical in structure. The pair of electrode bases are disposed on opposite inner walls of the insulating housing via the fixing assembly, thereby achieving low difficulty in preparing electrode samples, high weighing accuracy, and meeting the requirements for testing electrode ablation performance.

Description

Technical Field

[0001] The invention relates to a gas switch, in particular to a gas spark switch for electrode material ablation testing. Background Art

[0002] Gas switches are widely used in primary pulse sources. They feature simple structure, reliable performance, and easy installation, making them key components for achieving electrical power amplification. Fast-pulse linear transformer drivers (FLTDs) typically control hundreds of thousands of gas switches. Their structural characteristics dictate their high reliability, ensuring the longest possible operating life of the switch electrodes. Therefore, achieving low jitter, long life, and high stability in gas switches remains a challenge.

[0003] One of the most significant factors affecting gas switch performance is electrode material ablation. Therefore, conducting electrode ablation experiments is crucial for selecting ablation-resistant electrode materials. Currently, two-electrode gas switches commonly used for electrode ablation testing typically have electrodes around 30 mm in diameter. These disadvantages include large electrode structures, high fabrication difficulty, inconvenient manufacturing and replacement, and low weighing accuracy, making them difficult to meet the requirements of electrode ablation testing. Summary of the Invention

[0004] The purpose of the present invention is to solve the technical problems of the existing two-electrode gas switch used for electrode ablation testing, such as large electrode structure, high preparation difficulty, inconvenient development and replacement, low weighing accuracy, and difficulty in meeting the requirements of electrode ablation testing. A gas spark switch for electrode material ablation testing is provided to achieve low difficulty in electrode sample preparation, low development cost, high weighing accuracy, easy replacement, and meet the needs of testing electrode ablation performance.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A gas spark switch for electrode material ablation testing, which is special in that it comprises a rectangular insulating housing, an electrode assembly, a fixing assembly and a pair of cover plates;

[0007] The electrode assembly is arranged on two corresponding inner side walls of the insulating shell;

[0008] There are two fixing components, which are respectively arranged on the two corresponding outer side walls of the insulating shell;

[0009] A pair of cover plates are respectively arranged on the two ports of the insulating housing;

[0010] The electrode assembly includes a pair of electrode bases and a pair of electrode needles respectively disposed on the pair of electrode bases. The electrode needles are cylindrical in structure, and the opposite ends of the pair of electrode needles are both hemispherical in structure.

[0011] The fixing assembly includes a coaxially arranged electrode base lead rod, a pressure block and an electrode clamp; a second groove adapted to the pressure block and a first mounting hole coaxial with the second groove are provided on the two corresponding outer side walls of the insulating shell; one end of the electrode base lead rod is connected to one end of the electrode base, and the other end extends out of the insulating shell and is connected to the pressure block, and the pressure block is used to connect to the external discharge circuit; a first boss is provided at the inner end of the electrode clamp; a triangular knife-edge groove is provided on the first boss; a first groove adapted to the first boss is provided at the notch at the other end of the electrode base opposite to the electrode clamp; a rectangular groove is provided at the bottom of the first groove; the triangular knife-edge groove and the rectangular groove form a cavity, and the electrode needle is provided in the cavity.

[0012] Furthermore, the electrode base includes a first cylinder, a second cylinder and a third cuboid connected in sequence from outside to inside; the diameter of the first cylinder is smaller than the diameter of the second cylinder;

[0013] The first cylinder is entirely located within the insulating housing and is connected to one end of the electrode base lead rod;

[0014] The second cylinder is connected to the inner wall of the insulating shell, and its outer periphery is provided with rounded corners for shielding the initial electrons;

[0015] The inner end of the third cuboid is the other end of the electrode base, which is used to set the electrode needle. The end of the third cuboid is provided with a notch that is compatible with the electrode fixture.

[0016] Furthermore, the first groove is provided at a gap of the third cuboid opposite to the electrode fixture.

[0017] Further,

[0018] The other end of the electrode base lead rod is provided with a second boss, and one end of the electrode base lead rod passes through the pressing block and the first mounting hole and is connected to the first cylinder.

[0019] Furthermore, the invention also includes a gas nozzle and a gas nozzle cap provided on the gas nozzle;

[0020] A second mounting hole is also provided on the outer side wall of the insulating shell, and the air nozzle is installed in the second mounting hole.

[0021] Furthermore, the pressing block is a rectangular parallelepiped structure.

[0022] Furthermore, the insulating shell and the cover are both made of organic glass;

[0023] The electrode base, electrode base guide rod, pressing block, electrode needle and electrode fixture are all made of stainless steel;

[0024] The electrode needle is made of stainless steel and tungsten-copper alloy;

[0025] The valve and valve cap are made of polyetheretherketone.

[0026] Compared with the prior art, the beneficial effects of the technical solution of the present invention are:

[0027] (1) The electrode needles in the gas spark switch for electrode material ablation testing of the present invention adopt a cylindrical structure, and the opposite ends of a pair of electrode needles are both hemispherical structures. While being able to meet the ablation performance test under different output currents, it also has the characteristics of low electrode manufacturing difficulty, low development cost and high weighing accuracy.

[0028] (2) The gas spark switch for electrode material ablation testing of the present invention has an electrode fixture that is compatible with the electrode base, making it more convenient to replace the electrode needle.

[0029] (3) In the gas spark switch for electrode material ablation testing of the present invention, the outer periphery where the second cylinder meets the inner wall of the insulating shell is provided with a chamfered corner, thereby preventing the initial electrons generated at the junction of the metal medium, the insulating medium and the gas medium under high voltage from affecting the discharge stability of the gas spark switch.

[0030] (4) The gas spark switch for electrode material ablation testing of the present invention has a triangular knife-edge groove provided on the electrode fixture, which is conducive to the fixation of the electrode needles and can also make the gap between the electrode needles arbitrarily adjustable within a certain range, so that the gap is negatively correlated with the voltage of the external discharge circuit.

[0031] (5) In the gas spark switch for electrode material ablation testing of the present invention, the second groove on the insulating shell can better position the pressing block, and the second boss on the electrode base lead rod cooperates with the pressing block, which can make the electrode base installation more stable and ensure the symmetry of the electrode needle.

[0032] (6) The gas spark switch for electrode material ablation testing of the present invention can be connected to multiple external discharge circuits, so that each external discharge circuit can discharge independently, which is beneficial to the ablation performance test of the gas spark switch of the present invention at different output currents. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of an embodiment of a gas spark switch for electrode material ablation testing according to the present invention;

[0034] Figure 2 This is a schematic diagram of the external three-dimensional structure of an embodiment of a gas spark switch for electrode material ablation testing according to the present invention;

[0035] Figure 3 Schematic diagram of the structure of the electrode base in the embodiment of the gas spark switch for electrode material ablation testing of the present invention;

[0036] Figure 4Schematic diagram of the position structure of the insulating housing, the electrode base and the electrode fixture in the embodiment of the gas spark switch for electrode material ablation testing of the present invention;

[0037] Figure 5 for Figure 4 A partial enlarged view of

[0038] Figure 6 This is a schematic diagram of the assembly of the electrode base lead rod and the pressing block in an embodiment of the gas spark switch for electrode material ablation testing of the present invention.

[0039] The accompanying drawings are denoted as follows:

[0040] 1-insulating shell, 2-electrode base, 21-first cylinder, 22-second cylinder, 23-third cuboid, 4-electrode base lead rod, 41-second boss, 5-pressing block, 6-electrode needle, 7-electrode fixture, 71-first boss, 72-triangular knife-edge groove, 8-gas nozzle, 9-gas nozzle cap, 10-cover plate. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the technical solution of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0042] like Figure 1 、 Figure 2 As shown, a gas spark switch for electrode material ablation testing includes an insulating housing 1, an electrode assembly, a fixing assembly, and a pair of cover plates 10; the electrode assembly is arranged on two corresponding inner side walls of the insulating housing 1; there are two fixing assemblies, which are respectively arranged on two corresponding outer side walls of the insulating housing 1, and the fixing assemblies are connected to an external discharge circuit; the pair of cover plates 10 are respectively arranged on two ports of the insulating housing 1.

[0043] The insulating shell 1 is made of organic glass material and has a rectangular structure with a length of 112mm, a width of 90mm, a height of 92mm, a thickness of 19mm, a chamfer radius of the outer wall of 10mm, and a chamfer radius of the inner wall of 5mm; the relative outer walls of the insulating shell 1 are provided with a second groove adapted to the pressure block 5 and a first mounting hole coaxial with the second groove; the second groove is a rectangular structure for mounting the pressure block 5, the length of the second groove is 36mm, the width is 34mm, and the depth is 4mm, and a first mounting hole with a diameter of 12mm is opened at the bottom center of the second groove; a pair of second mounting holes with a diameter of 15mm and a depth of 4mm are opened below the second groove on the outer wall of the insulating shell 1, and a threaded through hole with a diameter of 10mm is opened on the second mounting hole for mounting the gas nozzle 8, and a gas nozzle cap 9 is installed on the gas nozzle 8.

[0044] The electrode assembly includes a pair of electrode bases 2 and a pair of electrode needles 6 disposed oppositely on the electrode bases 2. The pair of electrode bases 2 are mounted on opposite inner walls of the insulating housing 1 via a fixing assembly. The fixing assembly includes a pair of electrode base lead rods 4, a pair of pressure blocks 5, and a pair of electrode fixtures 7. The pair of electrode base lead rods 4, the pair of pressure blocks 5, and the pair of electrode bases 2 are coaxially arranged. The electrode fixture 7 mates with one end of the electrode base 2, and a cavity is provided between the electrode fixture 7 and one end of the electrode base 2 to match the external structure of the electrode needles 6.

[0045] like Figure 3As shown, the electrode base 2 comprises a first cylinder 21, a second cylinder 22, and a third cuboid 23, connected in sequence from outside to inside. The diameter of the first cylinder 21 is smaller than that of the second cylinder 22. The first cylinder 21 is entirely located within the insulating housing 1 and is connected to one end of the electrode base lead rod 4 for positioning. The second cylinder 22 is connected to the inner wall of the insulating housing 1 and has rounded corners on its periphery to shield initial electrons. The inner end of the third cuboid 23, which is the other end of the electrode base 2, is used to accommodate the electrode needle 6. A notch is provided at its end to accommodate the electrode fixture 7 for receiving the electrode needle 6. The electrode base 2 is made of 304 stainless steel and is 40 mm long, 40 mm wide, and 23 mm thick. The first cylinder 21 has a diameter of 11 mm, a height of 5 mm, and an outer chamfer radius of 1 mm. The center of the first cylinder 21 is provided with an M8 threaded hole with a depth of 8 mm. The second cylinder 22 has a diameter of 25 mm, a height of 3 mm, and a chamfer radius of 2 mm at the end near the insulating housing 1. The third rectangular parallelepiped 23 is provided with a first groove corresponding to the notch opposite the electrode fixture 7. The first groove is 10 mm long and 3 mm deep, and a rectangular groove is provided at the bottom of the first groove. The rectangular groove is 2 mm long and 1.5 mm deep. The electrode base 2 is positioned using an external tooling. The external tooling is placed horizontally on a table, and the electrode base 2 is placed on the external tooling. The first cylinder 21 is connected to the first mounting hole on the inside of the insulating housing 1 and is symmetrically fixed to the inside of the insulating housing 1.

[0046] One end of the electrode base lead rod 4 is connected to one end of the electrode base 2. The other end of the electrode base lead rod 4 extends out of the insulating housing 1 and is connected to the pressure block 5, which is used to connect to the external discharge circuit. The other end of the electrode base lead rod 4 is provided with a second boss 41. The electrode base lead rod 4 is made of 304 stainless steel and is 35 mm long. One end of the electrode base lead rod 4 passes through the center through-hole of the pressure block 5 and the first mounting hole on the outer surface of the insulating housing 1, and then connects to the first cylindrical body 21. It is fixed to the threaded hole of the electrode base 2 using external tooling. The other end of the electrode base lead rod 4 is equipped with an 8 mm long M8 bolt.

[0047] like Figure 6 As shown, the compression block 5 is made of 304 stainless steel and has a rectangular structure, measuring 34 mm in length, 34 mm in width, and 12 mm in thickness, with a chamfer radius of 2 mm. A 13 mm diameter circular through-hole is located in the center, surrounded by four M5 threaded through-holes. These four M5 threaded through-holes connect to external discharge circuits, allowing each external discharge circuit to discharge independently, facilitating the ablation performance testing of the gas spark switch of the present invention at different output currents.

[0048] The material of the electrode needle 6 is stainless steel. In other embodiments, ablation-resistant metal materials such as tungsten-copper alloy can also be used for ablation testing. The electrode needle 6 is a hemispherical cylinder with a length of 9 mm and a diameter of 2 mm. The radius of the hemisphere at one end of the cylinder is 1 mm. It has the characteristics of low preparation difficulty, low development cost and high weighing accuracy.

[0049] like Figure 4 、 Figure 5 As shown, the electrode fixture 7 is made of 304 stainless steel. It is 40 mm long, 15.5 mm wide and 7 mm thick. A first boss 71 is provided at one end of the electrode fixture 7. The first boss 71 is adapted to the relative notch. The first boss 71 is 10 mm long, 7 mm wide, 3 mm high and has a chamfer radius of 1 mm. A triangular knife-edge groove 72 is provided on the first boss 71. The electrode needle 6 is located in the cavity formed by the triangular knife-edge groove 72 and the rectangular groove. In this example, the electrode needle 6 is placed in the rectangular groove of the electrode base 2, and then the rectangular boss of the electrode fixture 7 fits into the groove of the electrode base 2, fixing the electrode needle 6 in the cavity formed by the rectangular groove of the electrode base 2 and the triangular knife-edge groove of the electrode fixture 7. The electrode fixture 7 is connected to the electrode base 2 by fastening screws. The electrode needle 6 can be replaced by loosening two fastening screws, which is convenient and quick.

[0050] The gas nozzle 8 and the gas nozzle cap 9 are both made of polyetheretherketone material. The gas nozzle 8 is threadedly connected to the wide surface of the insulating shell 1, and the gas nozzle cap 9 is screwed into the gas nozzle 8.

[0051] The cover plate 10 is made of organic glass and features a sealing groove, 84 mm long and 64 mm wide, at its center. The groove is 4 mm wide and 1.8 mm deep, and its four corners are chamfered with a 2 mm radius for mounting rubber sealing rings, further ensuring the gas-tightness of the gas spark switch. Ten 9 mm diameter through-holes are located around the outer periphery of the sealing groove. Ten 13.75 mm deep M8 threaded holes are located at each end of the insulating housing 1. M8 screws pass through the through-holes in the cover plate 10 and screw into the threaded holes at each end of the insulating housing 1, securing the cover plate 10 to the housing.

[0052] The present invention can meet the requirements of ablation performance testing under different output currents, and has the advantages of low electrode preparation difficulty, low development cost, high weighing accuracy, and easy replacement, thus meeting the requirements of testing electrode ablation performance.

Claims

1. A gas spark switch for electrode material ablation testing, characterized by: It comprises a rectangular insulating shell (1), an electrode assembly, a fixing assembly, and a pair of cover plates (10); The electrode assembly is arranged on two corresponding inner side walls of the insulating shell (1); There are two fixing components, which are respectively arranged on two corresponding outer side walls of the insulating housing (1); The pair of cover plates (10) are respectively arranged on two ports of the insulating housing (1); The electrode assembly comprises a pair of electrode bases (2) and a pair of electrode needles (6) which are opposite to and respectively arranged on the pair of electrode bases (2); the electrode needles (6) are cylindrical structures, and the opposite ends of the pair of electrode needles (6) are both hemispherical structures; The fixing assembly comprises a coaxially arranged electrode base lead rod (4), a pressure block (5) and an electrode clamp (7); a second groove adapted to the pressure block (5) and a first mounting hole coaxial with the second groove are provided on the two corresponding outer side walls of the insulating shell (1); one end of the electrode base lead rod (4) is connected to one end of the electrode base (2), and the other end extends out of the insulating shell (1) and is connected to the pressure block (5), and the pressure block (5) is used to connect to an external discharge circuit; a first boss (71) is provided at the inner end of the electrode clamp (7); a triangular knife-edge groove (72) is provided on the first boss (71); a first groove adapted to the first boss (71) is provided at the notch of the other end of the electrode base (2) opposite to the electrode clamp (7); a rectangular groove is provided at the bottom of the first groove; the triangular knife-edge groove (72) and the rectangular groove form a cavity, and the electrode needle (6) is provided in the cavity.

2. A gas spark switch for electrode material ablation testing according to claim 1, characterized in that: The electrode base (2) comprises a first cylinder (21), a second cylinder (22), and a third cuboid (23) connected in sequence from the outside to the inside; the diameter of the first cylinder (21) is smaller than the diameter of the second cylinder (22); The first cylinder (21) is entirely located within the insulating housing (1) and is connected to one end of the electrode base lead rod (4); The second cylinder (22) is connected to the inner side wall of the insulating shell (1), and its outer periphery is provided with rounded corners for shielding initial electrons; The inner end of the third cuboid (23) is the other end of the electrode base (2), which is used to set the electrode needle (6), and the end thereof is provided with a notch adapted to the electrode fixture (7).

3. The gas spark switch for electrode material ablation testing according to claim 2, characterized in that: The first groove is provided at a gap between the third cuboid (23) and the electrode fixture (7) opposite to each other.

4. A gas spark switch for electrode material ablation testing according to claim 3, characterized in that: The other end of the electrode base lead rod (4) is provided with a second boss (41), and one end of the electrode base lead rod (4) passes through the pressing block (5) and the first mounting hole to be connected to the first cylinder (21).

5. The gas spark switch for electrode material ablation testing according to claim 4, characterized in that: It also includes an air nozzle (8) and an air nozzle cap (9) disposed on the air nozzle (8); A second mounting hole is also provided on the outer side wall of the insulating shell (1), and the air nozzle (8) is installed in the second mounting hole.

6. The gas spark switch for electrode material ablation testing according to claim 5, characterized in that: The pressing block (5) is a rectangular parallelepiped structure.

7. A gas spark switch for electrode material ablation testing according to claim 6, characterized in that: The insulating housing (1) and the cover plate (10) are both made of organic glass; The electrode base (2), the electrode base guide rod (4), the pressing block (5), and the electrode fixture (7) are all made of stainless steel; The electrode needle (6) is made of stainless steel or tungsten-copper alloy; The gas nozzle (8) and the gas nozzle cap (9) are both made of polyetheretherketone.

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