Filter leakproofness testing device

Abstract

The utility model discloses a filter leakproofness testing device in the technical field of filter waterproof testing. The filter leakproofness testing device comprises a bottom plate; the rack is mounted on the bottom plate and comprises a side plate and a top plate; the driving device is arranged on the top plate; the guide column is mounted between the bottom plate and the top plate; the movable pressing plate is mounted on the guide columns and is driven by the driving device; the pressing plate tool assembly is arranged between the tested piece and the movable pressing plate; the airtight tool assembly is used for being attached to the peripheral face of the tested piece, a sealing strip is arranged on the portion, attached to the tested piece, of the airtight tool assembly, an air pipe connector is formed in the side edge of the airtight tool assembly, and the air pipe connector is connected to the airtight tester. According to the testing device, through the airtight tool assembly and the pressing plate tool assembly, the tested piece is clamped between the airtight tool assembly and the pressing plate tool assembly to form a closed cavity, the airtightness of the tested piece is measured to be equivalent to the waterproofness of the tested piece, and therefore the testing efficiency of the waterproofness of the filter is greatly improved, and the result is more visual and stable.

Description

Technical Field

[0001] This utility model relates to the field of filter waterproof testing technology, and in particular to a filter airtightness testing device. Background Technology

[0002] Base station filters are generally used outdoors, which requires that the filters and other components have good waterproof properties after installation.

[0003] During the manufacturing process of filters, the waterproof performance of the filters needs to be evaluated and tested. Currently, the waterproof performance evaluation of filters is mostly carried out by spraying or immersion testing to simulate the filter's operating environment. However, spraying or immersion testing is often time-consuming and the test results are not very intuitive. Utility Model Content

[0004] This application provides a filter airtightness testing device that uses airtightness testing to quickly evaluate the filter's waterproofness, solving the problems of time-consuming and unintuitive results in conventional waterproofness evaluation tests in the prior art.

[0005] This application provides a filter airtightness testing device, comprising:

[0006] Base plate;

[0007] A frame, mounted on the base plate, the frame including side plates and a top plate;

[0008] A drive unit is mounted on the top plate;

[0009] Guide columns are installed between the base plate and the top plate;

[0010] The movable pressure plate is installed on the guide column and moves along the guide column by the drive device;

[0011] A pressure plate fixture assembly is disposed between the test piece and the movable pressure plate to provide pressure to the mounting screw positions of the test piece;

[0012] An airtight fixture assembly is mounted on a base plate. The airtight fixture assembly is used to fit the periphery of the test piece. The part of the airtight fixture assembly that fits with the test piece is provided with a sealing strip. An air pipe interface is provided on the side of the airtight fixture assembly, and the air pipe interface is connected to an airtightness tester.

[0013] The beneficial effects of the above embodiments are as follows: This filter airtightness testing device uses an airtight fixture assembly and a pressure plate fixture assembly to clamp the test piece in the middle to form a sealed cavity. This cavity is inflated to a certain pressure. After inflation, the air source is disconnected, and the pressure drop inside the cavity is tested within a certain period of time. If the pressure drop reaches a certain level, it indicates that the test piece is leaking air, which is equivalent to poor waterproofness of the test piece. Conversely, if the pressure drop is not significant, the waterproofness of the test piece is qualified. This greatly improves the efficiency of filter waterproofness testing, and the results are more intuitive and stable.

[0014] Based on the above embodiments, this application can be further improved as follows:

[0015] In one embodiment of this application, a linear bearing is installed in the middle of the guide post, and the movable pressure plate is installed on the guide post through the linear bearing.

[0016] In one embodiment of this application, the filter sealing test device further includes a connecting plate, which connects the movable pressure plate to the output terminal of the drive device.

[0017] In one embodiment of this application, the driving device consists of three pneumatic hydraulic cylinders installed in parallel in sequence. The connecting plate includes a first connecting plate and two second connecting plates. The first connecting plate connects the movable pressure plate to the piston rod of the middle pneumatic hydraulic cylinder, and the second connecting plates connect the movable pressure plate to the piston rods of the pneumatic hydraulic cylinders on both sides.

[0018] In one embodiment of this application, the bottom of the pressure plate tooling assembly is provided with a plurality of support columns and pressure heads corresponding to the mounting screw positions of the test piece. The support columns are mounted on the pressure plate tooling assembly and provide downward pressure to the pressure heads during pressing. The pressure heads are mounted at the bottom of the support columns and provide downward pressure to the test piece during pressing.

[0019] In one embodiment of this application, the indenter is made of soft rubber to avoid damage to the test piece.

[0020] In one embodiment of this application, the airtight tooling assembly is further provided with several blocks around its perimeter for quickly positioning the test piece.

[0021] In one embodiment of this application, the stop is made of soft rubber to avoid damage to the test piece.

[0022] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0023] 1. This filter sealing test device is convenient and quick to use, which greatly improves the testing efficiency during the mass production of filters.

[0024] 2. The airtightness testing device of this filter provides accurate test results. The test values ​​can be directly read from the airtightness tester. The results are intuitive, highly accurate, and stable. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0026] Figure 1 This is a schematic diagram of the structure of a filter airtightness testing device according to an embodiment of this application;

[0027] Figure 2 This is a schematic diagram of the structure of a filter airtightness testing device after the pressure plate tooling assembly and the test piece are removed in an embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the pressure plate tooling assembly and the test piece in the embodiments of this application;

[0029] Figure 4 This is a schematic diagram of the support column and pressure head in the embodiments of this application.

[0030] Among them, 1. base plate, 2. frame, 21. side plate, 22. top plate, 3. drive device, 4. guide column, 41. linear bearing, 5. movable pressure plate, 6. connecting plate, 7. pressure plate tooling assembly, 71. support column, 72. pressure head, 8. airtight tooling assembly, 81. stop block, 82. air pipe interface, 9. test piece. Detailed Implementation

[0031] The present invention will be further illustrated below with reference to specific embodiments. It should be understood that these embodiments are only for illustrating the present invention and not for limiting the scope of the present invention. After reading the present invention, any modifications of the present invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0032] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0033] In the description of this utility model, it should be noted that the terms "vertical," "outer peripheral surface," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0034] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In the description of this utility model, the illustrative expressions of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate different embodiments or examples described in this utility model, as well as the features of different embodiments or examples.

[0036] Example:

[0037] like Figure 1-4 As shown, a filter airtightness testing device includes: a base plate 1, a frame 2, a drive device 3, a guide column 4, a movable pressure plate 5, a connecting plate 6, a pressure plate tooling assembly 7, and an airtight tooling assembly 8.

[0038] The device under test 9 is a base station filter in this embodiment, but it can also be other similar devices with waterproof requirements.

[0039] Base plate 1, which is the main supporting structure of the entire testing device, is machined from a thick metal plate with holes.

[0040] The frame 2 is installed on the base plate 1. The frame 2 includes a side plate 21 and a top plate 22. The side plate 21 is installed on the base plate 1 to provide vertical support for the top plate 22. The top plate 22 is installed on the side plate 21 to support the drive device 3. Both the side plate 21 and the top plate 22 are machined from thick metal plates by machining and punching.

[0041] The drive device 3 is located on the top of the frame 2. In this embodiment, it consists of three pneumatic hydraulic cylinders installed in parallel. Pneumatic hydraulic cylinders are a commonly used mechanical device in industry. Their function is to convert the energy of compressed air into mechanical energy to push or lift objects. Pneumatic hydraulic cylinders are driven by compressed air and can generate a large linear force, making them suitable for applications that require high force output.

[0042] Guide columns 4 are installed between the base plate 1 and the top plate 22. In this embodiment, four guide columns are provided. A linear bearing 41 is installed in the middle of the guide column 4 to provide horizontal holding force when the movable pressure plate 5 moves up and down. The guide column 4 is machined from round steel. The linear bearing 41 is a linear motion device, mainly used for linear stroke and cooperating with a cylindrical shaft.

[0043] The movable pressure plate 5 is mounted on the guide column 4 via a linear bearing 41 and moves up and down under the drive of the drive device 3. In this embodiment, it is driven up and down by the piston rod of the pneumatic hydraulic cylinder. During testing, the pressure is applied to the pressure plate tooling assembly 7, making the pressure application more stable. The movable pressure plate 5 is machined from a thick metal plate by machining and punching.

[0044] The connecting plate 6 connects the movable pressure plate 5 to the output end of the drive device 3. In this embodiment, the connecting plate 6 includes a first connecting plate 6 and two second connecting plates 6. The first connecting plate 6 connects the movable pressure plate 5 to the piston rod of the middle pneumatic hydraulic cylinder, and the second connecting plate 6 connects the movable pressure plate 5 to the piston rods of the pneumatic hydraulic cylinders on both sides, making the pressure application more stable. The connecting plates 6 are all machined by drilling holes in thick metal plates.

[0045] The pressure plate fixture assembly 7 is positioned between the test piece 9 and the movable pressure plate 5. Designed according to the shape of the test piece 9, the assembly provides pressure at the mounting screw positions to simulate the installation environment of the test piece 9 during use. Multiple supports 71 and pressure heads 72 are located at the bottom of the pressure plate fixture assembly 7 corresponding to the mounting screw positions of the test piece 9. The stainless steel supports 71 are mounted on the pressure plate fixture assembly 7, providing downward pressure to the pressure heads 72 during pressing. The pressure heads 72, mounted on the supports 71, also provide downward pressure to the test piece 9 during pressing. They are made of soft rubber to prevent damage to the test piece 9. Since the pressure plate fixture assembly applies pressure to the test piece at several points, the stability and balance of the pressure application are crucial. The aforementioned design of the three pneumatic hydraulic cylinders, three connecting plates, and guide columns is precisely to ensure the stability and balance of the pressure applied by the movable pressure plate to the pressure plate fixture assembly.

[0046] An airtight fixture assembly 8 is mounted on the base plate 1. The test piece 9 is installed inside the airtight fixture assembly 8. The airtight fixture assembly 8 is designed according to the shape of the test piece 9 to fit the periphery of the test piece 9. A sealing strip is provided in the middle of the part of the airtight fixture assembly 8 that fits with the test piece 9. After being pressed together, a sealed space is formed. Several blocks 81 are also distributed around the airtight fixture assembly 8 to quickly position the test piece 9. The blocks 81 are made of soft rubber to avoid damage to the test piece 9. An air pipe interface 82 is provided on the side of the airtight fixture assembly 8. An air pipe is connected to an airtightness tester to test the airtightness of the test piece 9.

[0047] The principle of this filter airtightness testing device for quickly evaluating the waterproofness of filters is as follows: the test piece is clamped in the middle to form a sealed cavity through the airtight fixture assembly and the pressure plate fixture assembly. This cavity is inflated to a certain pressure. After inflation, the air source is disconnected, and the pressure drop inside the cavity is tested within a certain period of time. If the pressure drop reaches a certain level, it indicates that the test piece is leaking air, which is equivalent to poor waterproofness of the test piece. Conversely, if the pressure drop is not significant, the waterproofness of the test piece is qualified.

[0048] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages:

[0049] 1. This filter airtightness testing device is convenient and quick to use. From the assembly of the test piece and tooling to the end of the test, it can be controlled within about 5 minutes. Spray testing or immersion testing often takes several hours, thus greatly improving the testing efficiency in the mass production of filters.

[0050] 2. The airtightness testing device of this filter provides accurate test results. The test values ​​can be directly read from the airtightness tester. The results are intuitive, highly accurate and stable. The pass / fail status is objective and fair, avoiding the inaccurate intuitive judgment results after spray test or immersion test.

[0051] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A filter airtightness testing device, characterized in that, include: Base plate; A frame, mounted on the base plate, the frame including side plates and a top plate; A drive unit is mounted on the top plate; Guide columns are installed between the base plate and the top plate; The movable pressure plate is installed on the guide column and moves along the guide column by the drive device; A pressure plate fixture assembly is disposed between the test piece and the movable pressure plate to provide pressure to the mounting screw positions of the test piece; An airtight fixture assembly is mounted on a base plate. The airtight fixture assembly is used to fit the periphery of the test piece. The part of the airtight fixture assembly that fits with the test piece is provided with a sealing strip. An air pipe interface is provided on the side of the airtight fixture assembly, and the air pipe interface is connected to an airtightness tester.

2. The filter sealing performance testing device according to claim 1, characterized in that: A linear bearing is installed in the middle of the guide column, and the movable pressure plate is installed on the guide column through the linear bearing.

3. The filter airtightness testing device according to claim 1, characterized in that: The filter airtightness testing device also includes a connecting plate, which connects the movable pressure plate to the output end of the driving device.

4. The filter airtightness testing device according to claim 3, characterized in that: The driving device consists of three pneumatic hydraulic cylinders installed in parallel. The connecting plate includes a first connecting plate and two second connecting plates. The first connecting plate connects the movable pressure plate to the piston rod of the middle pneumatic hydraulic cylinder, and the second connecting plates connect the movable pressure plate to the piston rods of the pneumatic hydraulic cylinders on both sides.

5. The filter airtightness testing device according to claim 1, characterized in that: The bottom of the pressure plate fixture assembly is provided with multiple supports and pressure heads corresponding to the mounting screw positions of the test piece. The supports are mounted on the pressure plate fixture assembly, and the pressure heads are mounted on the bottom of the supports.

6. The filter airtightness testing device according to claim 5, characterized in that: The pressure head is made of soft rubber.

7. The filter airtightness testing device according to claim 1, characterized in that: The airtight tooling assembly is also surrounded by several blocks to quickly position the test piece.

8. The filter airtightness testing device according to claim 7, characterized in that: The stop is made of soft rubber.

Images