Sealing leak detection device for tantalum cover insulator of composite tantalum fixed capacitor

Abstract

A sealing leak detection device for a tantalum cover insulator of a composite tantalum fixed capacitor comprises a helium mass spectrometer leak detector, an installation jig used for installing the tantalum cover insulator, and a fixing clamp arranged on the helium mass spectrometer leak detector and used for fixing the installation jig. The mounting jig comprises a jig body, a mounting block, an air hole and a positioning piece, wherein a test cavity is formed in the jig body; the mounting block is arranged at the bottom of the test cavity and is used for mounting the tantalum cover insulator; the air hole extends downwards from the top of the mounting block and penetrates through the jig body; the structure of the sealing leak detection device is limited, the installation jig is arranged for installing the tantalum cover insulator, the installation jig is connected with the helium mass spectrometer leak detector in cooperation with the fixing clamp, in the testing process, it is only needed to blow helium into the testing cavity, whether the tantalum cover insulator is qualified or not is judged according to the signal sent by the helium mass spectrometer leak detector, and the whole sealing leak detection device is simple and convenient to use. The operation is convenient.

Description

Technical Field

[0001] The utility model belongs to the field of performance testing equipment for composite tantalum fixed capacitors, and in particular relates to a sealing leakage detection device for tantalum cover insulators of composite tantalum fixed capacitors. Background Art

[0002] The CAK36 fully sealed high-energy composite tantalum fixed capacitor is a new type of high-performance all-tantalum capacitor with high energy density, low impedance and full sealing. The insulator is its important raw material, and whether the tantalum cover insulator leaks acid is an important indicator of whether the finished capacitor is qualified. The traditional inspection method is to conduct a sealing test on the finished capacitor. The test method adopts the method 112 test condition D test method in GJB360B-2009 "Test Methods for Electronic and Electrical Components". The traditional method is to inspect the finished product, which cannot intercept unqualified insulator raw materials. This will cause some unqualified raw materials to flow into production, and ultimately affect the qualified rate of the finished capacitor. Therefore, it is very necessary to design a leak detection fixture for the sealing of the tantalum cover insulator of the CAK36 fully sealed high-energy composite tantalum fixed capacitor. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide a sealing leakage detection device for a tantalum cover insulator of a composite tantalum fixed capacitor.

[0004] The utility model adopts the following technical solutions:

[0005] A sealing leak detection device for tantalum cover insulators of composite tantalum fixed capacitors comprises a helium mass spectrometer leak detector, a mounting fixture for mounting the tantalum cover insulator, and a fixing fixture arranged on the helium mass spectrometer leak detector for fixing the mounting fixture, wherein the mounting fixture comprises a fixture body with a test cavity formed inside, a mounting block arranged at the bottom of the test cavity for mounting the tantalum cover insulator, an air vent extending downward from the top of the mounting block through the fixture body, and a positioning piece arranged at the top of the mounting block for fixing the tantalum cover insulator.

[0006] Furthermore, the positioning member is an annular nano tape arranged on the top of the mounting block.

[0007] Furthermore, the fixing fixture includes a fixing seat arranged on the top of the helium mass spectrometer leak detector for receiving the fixture body and a locking clamp fixing the fixture body on the fixing seat, and the fixing seat is provided with a connecting hole connecting the air vent and the helium mass spectrometer leak detector.

[0008] Furthermore, the fixing seat includes a fixing seat body arranged on the top of the helium mass spectrometer leak detector and a limiting ring arranged on the top of the fixing seat body, the connecting hole extends downward from the top of the fixing seat body, and the limiting ring is arranged around the connecting hole.

[0009] Furthermore, the fixture body includes a cylindrical testing section, a connecting section arranged below the testing section and in contact with the fixing seat, and a transition section arranged between the testing section and the connecting section. A limiting groove extending upward is formed on the bottom surface of the connecting section for the limiting ring to be embedded.

[0010] Furthermore, the transition section has a structure that is larger at the top and smaller at the bottom.

[0011] Furthermore, the fixing seat also includes a dustproof net arranged on the inner side of the limiting ring.

[0012] Furthermore, the locking hoop includes a first hoop ring and a second hoop ring that rotate to open and close, an elastic clamping ring arranged on the first hoop ring, and a clamping block arranged on the second hoop ring and connected to the elastic clamping ring, and the clamping block is formed with a clamping groove that cooperates with the elastic clamping ring.

[0013] Furthermore, the fixing seat also includes a first locking ring arranged on the top of the fixing seat body and surrounding the limiting ring, and a second locking ring opposite to the first locking ring is arranged at the bottom of the fixture body, and the first clamping ring and the second clamping ring clamp and lock around the first locking ring and the second locking ring, and the inner sides of the first clamping ring and the second clamping ring are formed with locking grooves for the first locking ring and the second locking ring to be embedded.

[0014] Furthermore, the inner diameter of the test cavity is larger than the outer diameter of the tantalum cover insulator.

[0015] From the above description of the utility model, it can be seen that compared with the prior art, the beneficial effects of the utility model are: the application limits the structure of the sealing leak detection device, sets a mounting fixture for installing the tantalum cover insulator, and then cooperates with the fixing clamp to realize the connection between the mounting fixture and the helium mass spectrometer leak detector. During the test, it is only necessary to spray helium into the test chamber, and judge whether the tantalum cover insulator is qualified according to the signal sent by the helium mass spectrometer leak detector. The overall design is simple and easy to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of a sealing leak detection device;

[0017] Figure 2 Illustration of the coordination between the installation jig and the fixing fixture Figure 1 ;

[0018] Figure 3 Illustration of the coordination between the installation jig and the fixing fixture Figure 2 ;

[0019] Figure 4 Illustration of the coordination between the installation jig and the fixing fixture Figure 3 ;

[0020] In the figure, 1-helium mass spectrometer leak detector, 2-installation fixture, 3-fixing fixture, 21-fixture body, 211-test section, 212-connecting section, 213-transition section, 214-limiting groove, 22-test cavity, 23-installation block, 24-air vent, 25-positioning piece, 26-second locking ring, 31-fixed seat, 311-fixed seat body, 312-connecting hole, 313-limiting ring, 314-dustproof net, 315-first locking ring, 32-locking hoop, 321-first hoop ring, 322-second hoop ring, 323-spring clamp, 324-clamping block, 325-slot, 33-locking groove. DETAILED DESCRIPTION

[0021] The present invention is further described below through specific implementation methods.

[0022] Reference Figures 1 to 4 As shown, a sealing leak detection device for tantalum cover insulator of composite tantalum fixed capacitor includes a helium mass spectrometer leak detector 1, a mounting fixture 2 for mounting the tantalum cover insulator, and a fixing fixture 3 arranged on the helium mass spectrometer leak detector 1 for fixing the mounting fixture 2.

[0023] The mounting fixture 2 includes a fixture body 21 with a test cavity 22 formed therein, a mounting block 23 disposed at the bottom of the test cavity 22 for mounting a tantalum cover insulator, an air hole 24 extending downward from the top of the mounting block 23 through the fixture body 21, and a positioning member 25 disposed at the top of the mounting block 23 for fixing the tantalum cover insulator. Specifically, the positioning member 25 is an annular nano tape disposed on the top of the mounting block 23. During testing, the annular nano tape is wrapped around the air hole 24 and attached to the top of the mounting block 23, and then the tantalum cover insulator is adhered and fixed to the top of the mounting block 23 to block the air hole 24, thereby completing the fixation of the tantalum cover insulator. Furthermore, the size of the tantalum cover insulator is adapted to the size of the mounting block 24.

[0024] The fixture body 21 includes a test section 211 arranged in a cylindrical shape, a connecting section 212 arranged below the test section 211 and in contact with the fixing fixture 3, and a transition section 213 arranged between the test section 211 and the connecting section 212. Specifically, the transition section 213 has a structure that is larger at the top and smaller at the bottom. Furthermore, the inner diameter of the test cavity 22 is larger than the outer diameter of the tantalum cap insulator, so that the helium entering the test cavity 22 has sufficient space to spread to both sides and will not leave directly from the bottom to the top, thereby ensuring the accuracy of the test results of the tantalum cap insulator.

[0025] The fixing fixture 3 comprises a fixing seat 31 arranged on the top of the helium mass spectrometer leak detector 1 for receiving the fixture body 21 and a locking clamp 32 for fixing the fixture body 21 on the fixing seat 31 .

[0026] The fixing seat 31 includes a fixing seat body 311 arranged on the top of the helium mass spectrometer leak detector 1, a connecting hole 312 extending downward from the top of the fixing seat body 311 to connect the air vent 24 and the helium mass spectrometer leak detector, a limiting ring 313 arranged on the top of the fixing seat body 311, and a dustproof net 314 arranged on the inner side of the limiting ring 313. Specifically, the limiting ring 313 is arranged around the connecting hole 312, and a limiting groove 214 extending upward for the limiting ring 313 to be embedded is formed on the bottom surface of the connecting section 212. Through the cooperation between the limiting ring 313 and the limiting groove 214, the initial positioning connection between the fixture body 21 and the fixing seat 31 is realized, thereby ensuring the subsequent use of the locking clamp 32.

[0027] The locking hoop 32 includes a first hoop ring 321 and a second hoop ring 322 that can be rotated to open and close with each other, a spring clamp 323 rotatably arranged on the first hoop ring 321, and a clamping block 324 arranged on the second hoop ring 322 and connected to the elastic clamp 323. Specifically, a clamping groove 325 that cooperates with the elastic clamp 323 is formed on the clamping block 324. The elastic clamp 323 cooperates with the clamping groove 325 to achieve the connection between the first hoop ring 321 and the second hoop ring 322, thereby achieving the connection between the fixing seat 31 and the fixture body 21; correspondingly, the fixing seat 31 also includes a first clamping ring 313 arranged on the top of the fixing seat body 311 and surrounding the limiting ring 313 The locking ring 315, the fixture body 21 also includes a second locking ring 26 arranged around the connecting section 212 and opposite to the first locking ring 315, and the inner sides of the first hoop ring 321 and the second hoop ring 321 are formed with locking grooves 33 for the first locking ring 315 and the second locking ring 26 to be embedded; when the fixture body 21 and the fixing seat 31 are fixed, the first hoop ring 321 and the second hoop ring 321 surround the first locking ring 315 and the second locking ring 26 and clamp them, so that the first hoop ring 321 and the second hoop ring 321 are embedded in the corresponding locking grooves 33, and then cooperate with the elastic clamping ring 323 and the clamping groove 325 to realize the clamping fixation of the fixture body 21 and the fixing seat 31.

[0028] During the test, firstly, the annular nano tape is wrapped around the air vent 24 and attached to the top of the mounting block 23, and then the tantalum cap insulator is attached to the annular nano tape to block the air vent 24; then, the fixture body 21 is fixed to the fixing seat 31 through the locking clamp 32, and then helium is blown into the test cavity 22; if there is a leak in the tantalum cap insulator, helium will enter the air vent 24 through the leak, and enter the helium mass spectrometer leak detector along the connecting hole 312, and the helium mass spectrometer leak detector will send a signal to remind that there is a problem with the tantalum cap insulator; if the helium mass spectrometer leak detector does not send a signal within the specified test time, it means that the tantalum cap insulator is of qualified quality.

[0029] The present application limits the structure of the sealing leak detection device, sets up an installation fixture 3 for installing the tantalum cover insulator, and then cooperates with the fixing fixture 3 to realize the connection between the installation fixture 2 and the helium mass spectrometer leak detector 1. During the test, it is only necessary to spray helium into the test chamber 22, and judge whether the tantalum cover insulator is qualified according to the signal sent by the helium mass spectrometer leak detector. The overall design is simple and easy to operate.

[0030] The above description is only a preferred embodiment of the present invention, and therefore cannot be used to limit the scope of implementation of the present invention. That is, equivalent changes and modifications made according to the scope of application of the present invention and the contents of the specification should still fall within the scope covered by the present invention.

Claims

1. A sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor, characterized by: The invention comprises a helium mass spectrometer leak detector, a mounting fixture for mounting a tantalum cover insulator, and a fixing fixture arranged on the helium mass spectrometer leak detector for fixing the mounting fixture. The mounting fixture comprises a fixture body with a test cavity formed inside, a mounting block arranged at the bottom of the test cavity for mounting the tantalum cover insulator, an air vent extending downward from the top of the mounting block through the fixture body, and a positioning piece arranged at the top of the mounting block for fixing the tantalum cover insulator.

2. The sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor according to claim 1 is characterized in that: The positioning piece is an annular nano tape arranged on the top of the mounting block.

3. The sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor according to claim 1 is characterized in that: The fixing fixture comprises a fixing seat arranged on the top of the helium mass spectrometer leak detector for receiving the fixture body and a locking clamp fixing the fixture body on the fixing seat. The fixing seat is provided with a connecting hole connecting the air vent and the helium mass spectrometer leak detector.

4. The sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor according to claim 3 is characterized in that: The fixing seat comprises a fixing seat body arranged on the top of the helium mass spectrometer leak detector and a limiting ring arranged on the top of the fixing seat body, the connecting hole extends downward from the top of the fixing seat body, and the limiting ring is arranged around the connecting hole.

5. The sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor according to claim 4 is characterized in that: The fixture body includes a cylindrical testing section, a connecting section arranged below the testing section and in contact with a fixing seat, and a transition section arranged between the testing section and the connecting section. A limiting groove extending upward is formed on the bottom surface of the connecting section for a limiting ring to be embedded.

6. The sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor according to claim 5, characterized in that: The transition section is in a structure that is larger at the top and smaller at the bottom.

7. The sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor according to claim 4, characterized in that: The fixing seat also includes a dustproof net arranged on the inner side of the limiting ring.

8. The sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor according to claim 3 is characterized in that: The locking hoop includes a first hoop ring and a second hoop ring that rotate to open and close with each other, an elastic clamping ring arranged on the first hoop ring, and a clamping block arranged on the second hoop ring and connected to the elastic clamping ring, wherein the clamping block is formed with a clamping groove that cooperates with the elastic clamping ring.

9. The sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor according to claim 8, characterized in that: The fixing seat also includes a first locking ring arranged on the top of the fixing seat body and surrounding the limiting ring, and a second locking ring opposite to the first locking ring is arranged at the bottom of the fixture body, and the first hoop ring and the second hoop ring are clamped and locked around the first locking ring and the second locking ring, and the inner sides of the first hoop ring and the second hoop ring are formed with locking grooves for the first locking ring and the second locking ring to be embedded.

10. The sealing leakage detection device for tantalum cover insulator of composite tantalum fixed capacitor according to claim 1, characterized in that: The inner diameter of the test cavity is greater than the outer diameter of the tantalum cover insulator.

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