A capacitor durability test fixture

Abstract

This utility model relates to the field of capacitor technology and discloses a capacitor durability testing fixture, including a controller and an electrolytic capacitor. A capacitor aging tester is fixedly connected to the outer wall of the controller. As the electrolyte inside the electrolytic capacitor evaporates during use, the internal air pressure of the electrolytic capacitor increases, causing the explosion-proof valve at the bottom of the electrolytic capacitor to expand. The electrolytic capacitor will then squeeze the guide plate, which will push the connecting rod and the first connecting plate downwards, and pull the two hydraulic buffer supports and the limiting plate downwards. At this time, the two contact terminals at the bottom of the insulating sleeve will contact the positive and negative terminals of the electrolytic capacitor, and conduct the charge inside the electrolytic capacitor into the interior of the display bulb through the contact terminals, causing the display bulb to light up. When the display bulb is completely extinguished, the charge inside the electrolytic capacitor will also be discharged.

Description

Technical Field

[0001] This utility model relates to the field of capacitor technology, specifically to a capacitor durability testing fixture. Background Technology

[0002] As an indispensable basic component in electronic circuits, capacitors are widely used in various electronic devices, such as communication equipment, computers, home appliances, and industrial control systems. The stability and reliability of their performance play a key role in the normal operation of electronic devices. In practical applications, capacitors face a variety of complex and harsh working environments, such as continuous high temperature, frequent voltage fluctuations, and high humidity.

[0003] In the field of capacitor durability testing, the testing of electrolytic capacitors is crucial. However, existing testing technologies have certain shortcomings. As the electrolyte evaporates and the gas pressure increases, the internal pressure of the electrolytic capacitor continues to accumulate. When it reaches a certain level, it may trigger the activation of the explosion-proof valve or even cause the capacitor to burst, which can not only damage the testing equipment but also pose a safety threat to the operators. Therefore, those skilled in the art provide a capacitor durability testing fixture to solve the problems mentioned in the background. Utility Model Content

[0004] The purpose of this invention is to provide a capacitor durability testing fixture to solve the problems mentioned in the background art.

[0005] This utility model provides the following technical solution: a capacitor durability testing fixture, including a controller and an electrolytic capacitor, wherein a capacitor aging tester is fixedly connected in parallel to the outer wall of the controller, a workbench is fixedly connected to the top of the capacitor aging tester, the electrolytic capacitor is disposed on the top of the workbench, an edge interception strip is fixedly connected to the top of the capacitor aging tester on the outer wall of the workbench, a protective cover is inserted into the outer wall of the edge interception strip and fitted onto the top of the capacitor aging tester, and a trigger mechanism for releasing the residual charge of the electrolytic capacitor after detection is provided on the top of the workbench.

[0006] Preferably, the outer wall of the protective cover is embedded with an air heater for heating the air inside the protective cover, and two wires are symmetrically fixedly connected to the top of the capacitor aging tester, with each wire having an alligator clip electrically connected to its end.

[0007] Preferably, the electrolytic capacitor has two symmetrically fixed terminals at its top, one of which is a positive terminal and the other is a negative terminal. An explosion-proof valve is embedded at the center of the bottom of the electrolytic capacitor, and two alligator clips are respectively clamped on the positive terminal and the negative terminal.

[0008] Preferably, the triggering mechanism includes a guide plate that is slidably sleeved on the top of the workbench, a connecting rod is fixedly connected to the center of the bottom of the guide plate, a pressure sensor is embedded in the center of the top of the guide plate, and the bottom of the electrolytic capacitor presses against the top of the guide plate.

[0009] Preferably, a first connecting plate is fixedly connected to the end of the connecting rod away from the guide plate, and two hydraulic buffer brackets are symmetrically fixedly connected to the bottom end of the worktable on both sides of the connecting rod. The telescopic ends of the two hydraulic buffer brackets are fixedly connected to the top ends of the first connecting plate.

[0010] Preferably, two second connecting plates are symmetrically fixedly connected to both sides of the outer wall of the first connecting plate. A limiting plate is fixedly connected to the upper top edge of each second connecting plate. A sleeve plate is slidably sleeved on the upper top of each limiting plate. Three limiting bolts for limiting the limiting plate are threadedly connected to the outer wall of the sleeve plate.

[0011] Preferably, an insulating sleeve is fixedly connected to one side of the two sleeve plates that are close to each other. An installation plate is embedded inside the insulating sleeve. Two contact terminals for discharging the internal charge of the electrolytic capacitor are symmetrically fixedly connected to the bottom end of the installation plate. An indicator bulb is threadedly connected to the bottom end of the insulating sleeve. The two contact terminals are respectively connected to the positive and negative terminals of the electrolytic capacitor, and the two contact terminals are electrically connected to the indicator bulb through wires.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] This invention incorporates a trigger mechanism. During prolonged testing of the electrolytic capacitor, the electrolyte inside the capacitor evaporates with use, increasing the internal pressure. This causes the explosion-proof valve at the bottom of the capacitor to expand, squeezing the guide plate. The guide plate then pushes the connecting rod and the first connecting plate downwards, pulling the two hydraulic buffer supports and the limiting plate downwards. At this point, the two contact terminals at the bottom of the insulating sleeve come into contact with the positive and negative terminals of the electrolytic capacitor, transferring the internal charge to the indicator bulb, causing it to light up. Once the indicator bulb is completely extinguished, the charge inside the electrolytic capacitor has been completely discharged. During the squeezing of the guide plate, pressure is applied to the pressure sensor, which then alarms the controller and simultaneously stops the capacitor aging tester from testing the electrolytic capacitor. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of a capacitor durability testing fixture;

[0015] Figure 2 This is a schematic diagram of the side structure of a capacitor aging tester in a capacitor durability testing fixture;

[0016] Figure 3 This is a schematic diagram of the structure at the bottom of the workbench in a capacitor durability testing fixture.

[0017] Figure 4 This is a schematic diagram of the structure at the top of the workbench in a capacitor durability testing fixture.

[0018] Figure 5 This is a schematic diagram of the triggering mechanism in a capacitor durability testing fixture.

[0019] Figure 6 This is a schematic diagram of the capacitor body in a capacitor durability testing fixture.

[0020] In the diagram: 1. Controller; 2. Capacitor aging tester; 21. Wire; 22. Alligator clip; 3. Protective cover; 4. Air heater; 5. Edge interception strip; 6. Workbench; 7. Electrolytic capacitor; 71. Electrical terminal; 72. Explosion-proof valve; 8. Triggering mechanism; 81. Connecting rod; 82. First connecting plate; 83. Hydraulic buffer bracket; 84. Guide plate; 85. Pressure sensor; 86. Insulating sleeve; 861. Indicator bulb; 862. Electrical terminal; 863. Mounting plate; 87. Sleeve plate; 871. Limiting plate; 872. Second connecting plate; 873. Limiting bolt. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] Please see Figures 1-6 As shown, this utility model provides a technical solution: a capacitor durability testing fixture, including a controller 1 and an electrolytic capacitor 7. A capacitor aging tester 2 is fixedly connected to the outer wall of the controller 1. A workbench 6 is fixedly connected to the top of the capacitor aging tester 2. The electrolytic capacitor 7 is disposed on the top of the workbench 6. An edge intercepting strip 5 is fixedly connected to the top of the capacitor aging tester 2 on the outer wall of the workbench 6. A protective cover 3 is inserted into the outer wall of the edge intercepting strip 5 and fitted onto the top of the capacitor aging tester 2. A trigger mechanism 8 is provided on the top of the workbench 6 to release the residual charge of the electrolytic capacitor 7 after detection.

[0023] It should be noted that the controller 1 and the capacitor aging tester 2 are fixed side by side on the outer wall, making the overall structure compact, reducing space occupation, and facilitating the deployment of multiple devices for batch testing in limited space. The workbench 6 is fixed on the top of the capacitor aging tester 2, providing a stable platform for the electrolytic capacitor 7, ensuring the stability of the capacitor position during testing, and improving the accuracy of test data. The edge interception strip 5 is set on the outer wall of the workbench 6, which can effectively prevent the electrolytic capacitor 7 from accidentally rolling off during testing, avoiding capacitor damage and potential safety risks, and ensuring the safe and orderly testing process. The triggering mechanism 8 on the workbench 6 can quickly release the residual electricity of the electrolytic capacitor 7 after testing, avoiding the residual electricity from interfering with subsequent tests, ensuring that each test is carried out under the same initial conditions, improving the consistency and reliability of test results, providing accurate data support for capacitor durability assessment, and helping to improve product quality. The controller 1 is connected to the capacitor aging tester 2 by wires, and the capacitor aging tester 2 is connected to an external oscilloscope through wires to realize dynamic detection of the electrolytic capacitor 7. The controller 1 is also connected to the pressure sensor 85, forming an electrical connection.

[0024] As one implementation method in this embodiment, please refer to Figure 1 , Figure 3 and Figure 6 As shown, an air heater 4 for heating the air inside the protective cover 3 is embedded in the outer wall of the protective cover 3. Two wires 21 are symmetrically fixedly connected to the top of the capacitor aging tester 2. Each wire 21 is electrically connected to an alligator clip 22 at its end. Two terminals 71 are symmetrically fixedly connected to the top of the electrolytic capacitor 7. One terminal 71 is the positive terminal and the other terminal 71 is the negative terminal. An explosion-proof valve 72 is embedded in the center of the bottom end of the electrolytic capacitor 7. The two alligator clips 22 are clamped on the positive terminal and the negative terminal, respectively.

[0025] It should be noted that the air heater 4 embedded on the outside of the protective cover 3 can effectively heat the air inside the protective cover 3, providing a stable and suitable test temperature environment for the electrolytic capacitor 7. This ensures that the capacitor aging test is carried out accurately under controllable temperature conditions, improving the reliability of the test results. The two symmetrical wires 21 at the top of the capacitor aging tester 2, with alligator clips 22 connected to their conductive ends, can be easily and quickly clamped onto the symmetrical positive and negative terminals at the top of the electrolytic capacitor 7, respectively, to achieve a rapid conductive connection between the tester and the electrolytic capacitor 7. This simple operation saves test preparation time and improves test efficiency. The explosion-proof valve 72 embedded at the center of the bottom of the electrolytic capacitor 7 can open in time to release pressure if the internal pressure of the capacitor rises abnormally during the capacitor aging test, effectively preventing the capacitor from exploding due to excessive pressure, avoiding damage to test personnel and surrounding equipment, and ensuring the safety of the test process.

[0026] As one implementation method in this embodiment, please refer to Figures 3-5 As shown, the triggering mechanism 8 includes a guide plate 84 that is slidably sleeved on the top of the worktable 6. A connecting rod 81 is fixedly connected to the center of the bottom of the guide plate 84. A pressure sensor 85 is embedded in the center of the top of the guide plate 84. The bottom of the electrolytic capacitor 7 is pressed against the top of the guide plate 84. A first connecting plate 82 is fixedly connected to the end of the connecting rod 81 away from the guide plate 84. Two hydraulic buffer brackets 83 are symmetrically fixedly connected to the bottom of the worktable 6 on both sides of the connecting rod 81. The telescopic ends of the two hydraulic buffer brackets 83 are fixedly connected to the two ends of the top of the first connecting plate 82.

[0027] It should be noted that the electrolytic capacitor 7 is pressed against the guide plate 84. When it is necessary to release the residual charge after detection, the capacitor is pressed down with the help of external force, and the guide plate 84 slides accordingly. The pressure sensor 85 can accurately sense the pressure change and convert the pressure signal into an electrical signal, providing a precise triggering basis for the subsequent residual charge release operation, ensuring timely and accurate operation. The connecting rod 81 connects the guide plate 84 to the first connecting plate 82. Two hydraulic buffer brackets 83 are symmetrically fixed at the bottom of the workbench 6, and their telescopic ends are fixed to both ends of the first connecting plate 82. During the sliding process of the guide plate 84, the hydraulic buffer brackets 83 can play a buffering and stabilizing role, preventing the guide plate 84 from sliding too fast or shaking, ensuring that the entire triggering process is smooth and orderly, and preventing damage to the electrolytic capacitor 7 or the test fixture due to violent action. The pressure sensor 85 can be model P-8305-101G (not specifically specified).

[0028] As one implementation method in this embodiment, please refer to Figures 3-5 As shown, two second connecting plates 872 are symmetrically fixedly connected to both sides of the outer wall of the first connecting plate 82. A limiting plate 871 is fixedly connected to the upper top edge of each second connecting plate 872. A sleeve plate 87 is slidably sleeved on the upper top of each limiting plate 871. Three limiting bolts 873 for limiting the limiting plate 871 are threadedly connected to the outer wall of the sleeve plate 87. An insulating sleeve 86 is fixedly connected to the side of the two sleeve plates 87 that are close to each other. An installation plate 863 is embedded inside the insulating sleeve 86. Two contact terminals 862 for discharging the internal charge of the electrolytic capacitor 7 are symmetrically fixedly connected to the lower bottom end of the installation plate 863. A display bulb 861 is threadedly connected to the lower bottom end of the insulating sleeve 86. The two contact terminals 862 are respectively connected to the positive and negative terminals of the electrolytic capacitor 7, and the two contact terminals 862 are electrically connected to the display bulb 861 through wires.

[0029] It should be noted that the second connecting plates 872 and the limiting plates 871 on both sides of the first connecting plate 82, together with the sleeve plate 87 and the limiting bolts 873, can flexibly adjust the position of the sleeve plate 87 and fix it firmly, thereby precisely adjusting the height of the insulating sleeve 86 to adapt to different specifications of electrolytic capacitors 7, enhancing the versatility of the device. The insulating sleeve 86 can effectively isolate charge, avoid the risk of electric shock, and ensure the safety of operators. The internally embedded mounting plate 863 provides a stable installation position for the contact terminals 862. The two contact terminals 862 are respectively connected to the positive and negative terminals of the electrolytic capacitor 7, which can quickly and accurately discharge the charge inside the capacitor, ensuring that the residual charge is completely released. The indicator bulb 861, which is threaded to the bottom of the insulating sleeve 86, is electrically connected to the contact terminals 862. When the charge is discharged, if the circuit is connected, the bulb will light up, intuitively displaying the residual charge release status, allowing operators to understand the test progress in a timely manner.

[0030] Working principle: During the long-term testing of electrolytic capacitor 7, the electrolyte inside electrolytic capacitor 7 will evaporate as it is used, resulting in an increase in internal air pressure. At this time, the explosion-proof valve 72 embedded at the bottom of electrolytic capacitor 7 will expand. Since electrolytic capacitor 7 is placed on workbench 6 and its bottom end is pressed against the top of guide plate 84 of trigger mechanism 8, as the explosion-proof valve 72 expands, electrolytic capacitor 7 will squeeze guide plate 84. Guide plate 84 is slidably sleeved on the top of workbench 6. After being squeezed, it pushes the connecting rod 81 fixedly connected at the center of its bottom end and the first connecting plate 82 fixedly connected at the end of the connecting rod 81 away from guide plate 84 to move downward.

[0031] Two hydraulic buffer brackets 83 are symmetrically fixedly connected to the bottom of the workbench 6 on both sides of the connecting rod 81. When the first connecting plate 82 moves downward, it will pull the telescopic ends of the two hydraulic buffer brackets 83. At the same time, two second connecting plates 872 are symmetrically fixedly connected to both sides of the outer wall of the first connecting plate 82. The limiting plate 871 fixedly connected to the top edge of each second connecting plate 872 will also move downward. A sleeve plate 87 is slidably sleeved on the top of each limiting plate 871. Three limiting bolts 873 are threadedly connected to the outer wall of the sleeve plate 87 to limit the limiting plate 871.

[0032] An insulating sleeve 86 is fixedly connected to one side of the two sleeve plates 87 that are close to each other. As the above components move, the insulating sleeve 86 will also move downwards, and the two contact terminals 862 at its bottom end will contact the positive and negative terminals of the electrolytic capacitor 7. Two electrical terminals 71 are symmetrically fixedly connected to the top of the electrolytic capacitor 7, namely the positive terminal and the negative terminal. The charge inside the electrolytic capacitor 7 will be conducted through the contact terminals 862 to the display bulb 861 that is threaded to the bottom end of the insulating sleeve 86. The display bulb 861 will light up. When the display bulb 861 is completely extinguished, it indicates that the charge inside the electrolytic capacitor 7 has been completely discharged.

[0033] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A capacitor durability testing fixture, comprising a controller (1) and an electrolytic capacitor (7), characterized in that: A capacitor aging tester (2) is fixedly connected to the outer wall of the controller (1). A workbench (6) is fixedly connected to the top of the capacitor aging tester (2). An electrolytic capacitor (7) is placed on the top of the workbench (6). An edge intercepting strip (5) is fixedly connected to the outer wall of the workbench (6) at the top of the capacitor aging tester (2). A protective cover (3) is inserted into the outer wall of the edge intercepting strip (5) at the top of the capacitor aging tester (2). A triggering mechanism (8) is provided on the top of the workbench (6) to release the residual electricity after the electrolytic capacitor (7) is detected.

2. The capacitor durability testing fixture according to claim 1, characterized in that: An air heater (4) for heating the air inside the protective cover (3) is embedded in the outer wall of the protective cover (3). Two wires (21) are symmetrically fixedly connected to the top of the capacitor aging tester (2). Each wire (21) is electrically connected to an alligator clip (22) at its end.

3. The capacitor durability testing fixture according to claim 2, characterized in that: The electrolytic capacitor (7) has two terminals (71) symmetrically fixedly connected to its upper top. One of the terminals (71) is the positive terminal and the other terminal (71) is the negative terminal. An explosion-proof valve (72) is embedded in the center of the lower bottom of the electrolytic capacitor (7). Two alligator clips (22) are clamped on the positive terminal and the negative terminal respectively.

4. The capacitor durability testing fixture according to claim 1, characterized in that: The triggering mechanism (8) includes a guide plate (84) that is slidably sleeved on the top of the workbench (6). A connecting rod (81) is fixedly connected to the center of the bottom of the guide plate (84). A pressure sensor (85) is embedded in the center of the top of the guide plate (84). The bottom of the electrolytic capacitor (7) is pressed against the top of the guide plate (84).

5. The capacitor durability testing fixture according to claim 4, characterized in that: The first connecting plate (82) is fixedly connected to one end of the connecting rod (81) away from the guide plate (84). Two hydraulic buffer brackets (83) are symmetrically fixedly connected to the bottom end of the worktable (6) on both sides of the connecting rod (81). The telescopic ends of the two hydraulic buffer brackets (83) are fixedly connected to the top ends of the first connecting plate (82).

6. The capacitor durability testing fixture according to claim 5, characterized in that: Two second connecting plates (872) are symmetrically fixedly connected to the outer walls of the first connecting plate (82). A limiting plate (871) is fixedly connected to the upper top edge of each second connecting plate (872). A sleeve plate (87) is slidably sleeved on the upper top of each limiting plate (871). Three limiting bolts (873) for limiting the limiting plate (871) are threadedly connected to the outer wall of the sleeve plate (87).

7. The capacitor durability testing fixture according to claim 6, characterized in that: An insulating sleeve (86) is fixedly connected to one side of the two sleeves (87) that are close to each other. An installation plate (863) is embedded inside the insulating sleeve (86). Two contact terminals (862) for discharging the internal charge of the electrolytic capacitor (7) are symmetrically fixedly connected to the bottom end of the installation plate (863). A display bulb (861) is threaded to the bottom end of the insulating sleeve (86). The two contact terminals (862) are respectively connected to the positive and negative terminals of the electrolytic capacitor (7), and the two contact terminals (862) are electrically connected to the display bulb (861) through wires.

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