Withstand voltage test platform for high-voltage alternating-current capacitor element

Abstract

The utility model discloses a high-voltage alternating-current capacitor element withstand voltage test platform, which comprises a test box, a first insulating platform, a cylinder assembly, a movable test electrode, a second insulating platform and a fixed test electrode, and is characterized in that the test box comprises a test box body, a test box bottom and a test box cover; the first insulation platform comprises a first insulation plane and a first insulation support, the cylinder assembly comprises a cylinder body, a first air inlet, a second air inlet, a piston rod, an action hose, a reset hose, a cylinder action switch, an air source and a cylinder fixing plate, and the mobile test electrode comprises a first fixed insulation plate, a spring needle and a high-voltage power line. The second insulation platform comprises a second insulation plane and a second insulation support. The fixed test electrode comprises a second fixed insulation plate, a braided copper wire and a low-voltage power line. The device is simple in structure, is convenient to operate, and can meet the requirements of the withstand voltage test of the high-voltage alternating-current capacitor element.

Description

Technical Field

[0001] The utility model belongs to the technical field of capacitor testing, and in particular relates to a withstand voltage test platform for high-voltage AC capacitor elements. Background Art

[0002] AC capacitive voltage sensors and power supplies are being used in feeders, pole-mounted switches, and ring main units in power distribution networks to achieve primary and secondary integration. These devices require voltage divider or power supply capacitors, which are high-voltage AC capacitors with compact dimensions, good insulation, and sufficient capacitance.

[0003] The components of this type of capacitor can withstand higher voltages. These components are usually about 100mm long and 50mm in diameter. Their rated working voltage is U N The test voltage of high-voltage AC capacitor components during production is 25kV AC, while the withstand voltage of conventional AC capacitor components is 2~2.15U N The test voltage of the former is more than three times that of the latter. Therefore, the test voltage platform of high-voltage AC capacitor components has higher requirements for insulation.

[0004] During the production process, the end faces of capacitor components are exposed to air. Before the component withstand voltage test, their ends are sprayed with metal particles. When exposed to air, moisture adsorbs onto the metal surface. Rainy days, especially during the rainy season, can have a particularly severe impact on the components. This is especially true during withstand voltage tests of high-voltage AC capacitor components, where electrical flashovers and partial discharges are common, impacting component quality and reducing their lifespan.

[0005] In summary, this type of test voltage withstand platform is needed to solve technical problems such as insulation, flashover and partial discharge during the voltage withstand test of high-voltage AC capacitor components, while also improving the quality and life of the components. Utility Model Content

[0006] In order to solve the existing technical problems in the withstand voltage test of high-voltage AC capacitor components, the utility model proposes a high-voltage AC capacitor component withstand voltage test platform.

[0007] The technical solutions adopted in this utility model are as follows.

[0008] The utility model provides a withstand voltage test platform for high-voltage AC capacitor components. The test platform includes a test chamber, a first insulating platform, a cylinder assembly, a movable test electrode, a second insulating platform, and a fixed test electrode. The test chamber includes a test chamber body, a test chamber bottom, and a test chamber cover. The first insulating platform includes a first insulating plane and a first insulating bracket. The cylinder assembly includes a cylinder body, a first air inlet, a second air inlet, a piston rod, an actuating hose, a reset hose, a cylinder actuating switch, an air source, and a cylinder fixing plate. The movable test electrode includes a first fixed insulating plate, a spring pin, and a high-voltage power cord. The second insulating platform includes a second insulating plane and a second insulating bracket. The fixed test electrode includes a second fixed insulating plate, a braided copper wire, and a low-voltage power cord. The test chamber body is inserted into a groove in the test chamber bottom, and the connection between the two is coated with sealant. The first insulating bracket of the first insulating platform is placed on the test chamber bottom, with the first insulating plane of the first insulating platform placed on top of the first insulating bracket. The second insulating bracket of the second insulating platform is placed on the test chamber bottom, with the second insulating plane of the second insulating platform placed on top of the second insulating bracket. The cylinder assembly's cylinder fixing plate is fixed to the first insulating plane via a nut. The cylinder assembly's actuating and reset hoses are connected to the cylinder actuating switch via openings in the test chamber body. The cylinder assembly's piston rod is fixedly connected to the first fixed insulating plate of the movable test electrode via a nut. The first fixed insulating plate of the movable test electrode is fixedly connected to the spring pin via a nut. The spring pin is fixedly connected to the high-voltage power cord via soldering. The high-voltage power cord is connected to the external test power supply via an opening in the test chamber body. The second fixed insulating plate is inserted into the groove in the second insulating plane, and the connection between the two is coated with sealant. The braided copper wire is fixed to the second fixed insulating plate via a nut. The braided copper wire is fixedly connected to the low-voltage power cord via soldering. The low-voltage power cord is connected to the external test power supply via an opening in the test chamber body.

[0009] The spring needle consists of a needle tube, a spring and a needle.

[0010] Before the test, remove the test chamber cover, operate the cylinder action switch to make the piston rod of the cylinder assembly pull the mobile test electrode, place the test component horizontally on the second insulating plane with one end in contact with the braided copper wire, then operate the cylinder action switch to make the piston rod of the cylinder assembly push the mobile test electrode forward until the needle tip of the spring needle and the braided copper wire are fully in contact with the two ends of the test component, close the test chamber cover, and operate the external test power supply; at the end of the test, discharge the test component through the external circuit, operate the cylinder action switch to make the piston rod of the cylinder assembly pull the mobile test electrode, and the contact between the test component and the needle tip of the spring needle and the braided copper wire is disengaged, remove the test chamber cover, and take out the test component.

[0011] The test box body is in the shape of a cube and is made of insulating materials such as epoxy resin with a thickness of 10mm.

[0012] There is a square groove on the bottom surface of the test box, which is in the shape of a cube. It is made of insulating materials such as epoxy resin and has a thickness of 20mm.

[0013] The test box cover is in the shape of a cube and is made of insulating materials such as epoxy resin with a thickness of 10 mm.

[0014] The surface of the first insulating plane has a mounting hole, and the shape of the first insulating plane is a rectangular parallelepiped. The first insulating plane is made of insulating materials such as epoxy resin, and the thickness of the material is 20 mm.

[0015] The second insulating plane surface has a square groove and is in the shape of a cuboid. The material thereof is insulating material such as epoxy resin, and the thickness of the material is 20 mm.

[0016] The first fixed insulating plate is in the shape of a cuboid and is made of insulating materials such as epoxy resin, with a thickness of 20 mm.

[0017] The second fixed insulating plate is in the shape of a cuboid and is made of insulating materials such as epoxy resin, with a thickness of 10 mm.

[0018] Copper braided wire cross-sectional area 35mm 2 , its width is 50mm.

[0019] The contact surface between the needle tip and the spring of the pogo pin is beveled. The purpose of the bevel design is to ensure that when the pogo pin is working, the lateral force generated by the contact between the bevel and the spring is used to keep the needle tip in stable contact with the inner wall of the needle tube, so that the current mainly passes through the gold-plated needle tip and needle tube to obtain stable and extremely low contact resistance, and maintain a stable and reliable electronic and electrical connection even during frequent plugging and unplugging.

[0020] Furthermore, the piston rod of the cylinder can be a single rod or a double rod, and the cylinder action switch can be controlled manually or by a solenoid valve.

[0021] Furthermore, for a withstand voltage test on one component, three spring pins are assembled; if a withstand voltage test is conducted on multiple components at the same time, multiple sets of spring pins need to be assembled.

[0022] The beneficial effects of the utility model are as follows: the test platform has the characteristics of good insulation performance, safety and reliability, and can control the influence of air on the withstand voltage performance of components during the test, avoid electrical flashover, partial discharge and other phenomena on the end faces of components, and improve the quality and service life of components.

[0023] The utility model has a simple structure and can meet the requirements of withstand voltage test of high-voltage AC capacitor elements in terms of operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A schematic diagram of the implementation of the present utility model;

[0025] Figure 2 for Figure 1 Application diagram;

[0026] Figure 3 is a schematic diagram of a spring pin;

[0027] Figure 4 is a schematic diagram of the cylinder assembly;

[0028] In the figure, 1-test box; 2-first insulating platform; 3-cylinder assembly; 4-movable test electrode; 5-second insulating platform; 6-fixed test electrode;

[0029] 11-test chamber body; 12-test chamber bottom; 13-test chamber cover;

[0030] 21-first insulating plane; 22-first insulating bracket;

[0031] 31 - Cylinder body; 32 - First air inlet; 33 - Second air inlet; 34 - Piston rod; 35 - Actuating hose; 36 - Reset hose; 37 - Cylinder actuating switch; 38 - Air source; 39 - Cylinder fixing plate;

[0032] 41-first fixed insulating plate; 42-spring pin; 43-high voltage power line;

[0033] 51-second insulating plane; 52-second insulating bracket;

[0034] 61-second fixed insulating plate; 62-braided copper wire; 63-low-voltage power line;

[0035] 421-needle tube; 422-spring; 423-needle. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0037] from Figures 1 to 4 visible:

[0038] A high-voltage AC capacitor element withstand voltage test platform comprises a test box (1), a first insulating platform (2), a cylinder assembly (3), a movable test electrode (4), a second insulating platform (5) and a fixed test electrode (6);

[0039] The test box (1) includes a test box body (11), a test box bottom (12) and a test box cover (13); the first insulating platform (2) includes a first insulating plane (21) and a first insulating bracket (22); the cylinder assembly (3) includes a cylinder body (31), a first air inlet (32), a second air inlet (33), a piston rod (34), an action hose (35), a reset hose (36), a cylinder action switch (37), an air source (38) and a cylinder fixing plate (39); the movable test electrode (4) includes a first fixed insulating plate (41), a spring pin (42) and a high-voltage power line (43); the second insulating platform (5) includes a second insulating plane (51) and a second insulating bracket (52); the fixed test electrode (6) includes a second fixed insulating plate (61), a braided copper wire (62) and a low-voltage power line (63);

[0040] The test box body (11) is inserted into the groove of the test box bottom (12), and the connection between the two is coated with sealant; the first insulating bracket (22) of the first insulating platform (2) is placed on the test box bottom (12), and the first insulating plane (11) of the first insulating platform (2) is placed on the first insulating bracket (12); the second insulating bracket (52) of the second insulating platform (5) is placed on the test box bottom (12), and the second insulating plane (51) of the second insulating platform (5) is placed on the second insulating bracket (52); the cylinder fixing plate (39) of the cylinder assembly (3) is fixed on the first insulating plane (11) through a nut, and the action hose (35) and the reset hose (36) of the cylinder assembly (3) are connected to the cylinder action switch (37) through the opening of the test box body (11), and the cylinder assembly (3 ) and the first fixed insulating plate (41) of the movable test electrode (4) are fixedly connected by a nut; the first fixed insulating plate (41) of the movable test electrode (4) and the spring pin (42) are fixedly connected by a nut, the spring pin (42) and the high-voltage power line (43) are fixedly connected by soldering, and the high-voltage power line (43) is connected to the external test power supply through the opening of the test box body (11); the second fixed insulating plate (61) is inserted into the groove of the second insulating plane (51), and the connection between the two is coated with sealant; the braided copper wire (62) is fixed on the second fixed insulating plate (61) by a nut, the braided copper wire (62) and the low-voltage power line (63) are fixedly connected by soldering, and the low-voltage power line (63) is connected to the external test power supply through the opening of the test box body (11);

[0041] The spring needle (42) comprises a needle tube (421), a spring (422) and a needle head (423).

[0042] Before the test, the test box cover (13) is removed, the cylinder action switch (37) is operated to make the piston rod (34) of the cylinder assembly (3) pull the movable test electrode (4), the test component is horizontally placed on the second insulating plane (51) with one end in contact with the braided copper wire (62), and then the cylinder action switch (37) is operated to make the piston rod (34) of the cylinder assembly (3) push the movable test electrode (4) forward until the needle head (423) of the spring needle (42) and the braided copper wire (62) are in complete contact with both ends of the test component, the test box cover (13) is closed, and the external test power supply is operated; at the end of the test, the test component is discharged through the external circuit, the cylinder action switch (37) is operated to make the piston rod of the cylinder assembly (3) pull the movable test electrode (4), the contact between the test component and the needle head (423) of the spring needle (42) and the braided copper wire (62) is disengaged, the test box cover (13) is removed, and the test component is taken out.

[0043] The test box body (11) is in the shape of a cube and is made of insulating materials such as epoxy resin, with a thickness of 10 mm.

[0044] The surface of the bottom (12) of the test box has a square groove, and its shape is a cube. Its material is an insulating material such as epoxy resin, and the material thickness is 20mm.

[0045] The test box cover (13) is in the shape of a cube and is made of insulating materials such as epoxy resin, with a thickness of 10 mm.

[0046] The surface of the first insulating plane (21) is provided with a mounting hole, and the shape of the first insulating plane (21) is a rectangular parallelepiped. The first insulating plane (21) is made of insulating materials such as epoxy resin, and the thickness of the material is 20 mm.

[0047] The surface of the second insulating plane (51) has a square groove and is in the shape of a rectangular parallelepiped. The material thereof is an insulating material such as epoxy resin, and the thickness of the material is 20 mm.

[0048] The first fixed insulating plate (41) is in the shape of a cuboid and is made of insulating materials such as epoxy resin, with a thickness of 20 mm.

[0049] The second fixed insulating plate (61) is in the shape of a cuboid and is made of insulating materials such as epoxy resin, with a thickness of 10 mm.

[0050] The cross-sectional area of the copper braided wire (62) is 35 mm 2 , its width is 50mm.

[0051] The contact surface between the needle head (423) of the spring needle (42) and the spring (422) is an inclined surface. The function of the inclined surface design is to ensure that when the spring needle (42) is working, the lateral force generated by the contact between the inclined surface and the spring (422) is used to keep the needle head (423) in stable contact with the inner wall of the needle tube (421), so that the current mainly passes through the gold-plated needle head (423) and the needle tube (421), so as to obtain a stable and extremely low contact resistance, and maintain a stable and reliable electronic and electrical connection even in frequent plugging and unplugging.

[0052] Furthermore, the piston rod (34) of the cylinder assembly (3) can be a single rod or a double rod, and the cylinder action switch (37) can be controlled manually or by a solenoid valve.

[0053] Furthermore, for a withstand voltage test on one component, three spring pins (42) are assembled; if a withstand voltage test is performed on multiple components at the same time, multiple sets of spring pins (42) need to be assembled.

[0054] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included in the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A high-voltage AC capacitor component withstand voltage test platform, characterized by: The test platform includes a test box, a first insulating platform, a cylinder assembly, a movable test electrode, a second insulating platform and a fixed test electrode. The test box includes a test box body, a test box bottom and a test box cover. The first insulating platform includes a first insulating plane and a first insulating bracket. The cylinder assembly includes a cylinder body, a first air inlet, a second air inlet, a piston rod, an action hose, a reset hose, a cylinder action switch, an air source and a cylinder fixed plate. The movable test electrode includes a first fixed insulating plate, a spring pin and a high-voltage power line. The second insulating platform includes a second insulating plane and a second insulating bracket. The fixed test electrode includes a second fixed insulating plate, a braided copper wire and a low-voltage power line. The test box body is inserted into the groove at the bottom of the test box and sealant is applied at the connection. The first insulating bracket of the first insulating platform is placed on the bottom of the test box, the first insulating plane of the first insulating platform is placed on the first insulating bracket, and the second insulating platform's The two insulating brackets are placed on the bottom of the test box, the second insulating plane of the second insulating platform is placed on the second insulating bracket, the cylinder fixing plate of the cylinder assembly is fixed on the first insulating plane by a nut, the action hose and the reset hose of the cylinder assembly are connected to the cylinder action switch through the opening of the test box body, the piston rod of the cylinder assembly and the first fixed insulating plate of the movable test electrode are fixedly connected by a nut, the first fixed insulating plate of the movable test electrode and the spring pin are fixedly connected by a nut, the spring pin and the high-voltage power line are fixedly connected by soldering, the high-voltage power line is connected to the external test power supply through the opening of the test box body, the second fixed insulating plate is inserted into the groove of the second insulating plane and sealant is applied at the connection, the braided copper wire is fixed on the second fixed insulating plate by a nut, the braided copper wire and the low-voltage power line are fixedly connected by soldering, and the low-voltage power line is connected to the external test power supply through the opening of the test box body.

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