Filter sealing performance detection device

Abstract

The utility model discloses a filter sealing performance detection device, and belongs to the technical field of filter production equipment. The filter sealing performance detection device comprises a lubricating oil smoke generator and a detection tank. The detection tank is provided with a cavity used for installing a filter to be detected, the upper portion of the detection tank is detachably and hermetically connected with a sealing cover plate used for being hermetically connected with the filter to be detected, and the sealing cover plate is provided with an exhaust pipeline used for being communicated with the filter to be detected. A gas oil content detector is arranged at the outlet end of the exhaust pipeline; and the lubricating oil smoke generator is communicated with the cavity of the detection tank through a smoke conveying pipeline. The air tightness detection device is simple in structure, reasonable in design, simple to operate, low in detection cost, high in detection efficiency and good in detection accuracy, the air tightness of the filter is detected through smoke, the outgoing quality of the filter is effectively guaranteed, and the market competitiveness and brand influence of products can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of filter production equipment, in particular to a filter sealing detection device. Background Art

[0002] Filters have high requirements for sealing performance. After production, filters may experience bypass leakage caused by damaged filter material or poor glue sealing, resulting in filter failure. Therefore, in order to meet product quality requirements, filters must be tested for sealing performance. Currently, the industry generally uses the bubble method or imported large-scale dry-type testing machines to test filter sealing performance. The bubble method specifically involves connecting an air pipe to the filter, passing a certain pressure of gas into the filter through the air pipe, and then submerging the filter in water to observe whether bubbles are generated in the water to test the filter's sealing performance. This method has low detection efficiency and poor detection stability and reliability. After the test is completed, the filter needs to be dried, which is a cumbersome operation process. In addition, once water enters the filter, a short drying process cannot guarantee that the water stains in the filter are completely dried, thus affecting its use. Imported large-scale dry-type testing machines are expensive, which is not conducive to their widespread use. At the same time, the main function of oil-gas separation filters in air compressors and vacuum pumps is to separate lubricating oil from the oil-gas mixture, ensuring that the exhaust gas is relatively clean and oil-free to meet user requirements. Therefore, the air bubble method cannot be used to test the air tightness of oil-gas separation filters. Currently, there is no dedicated air tightness test device for oil-gas separation filters on the market.

[0003] Therefore, it is very necessary to develop a filter sealing detection device suitable for oil-gas separation filter. Utility Model Content

[0004] In order to overcome the shortcomings of the existing technology, the purpose of this utility model is to provide a filter sealing detection device, which has a simple structure and reasonable design. It detects the air tightness of the filter through smoke, is simple to operate, has low detection cost, high detection efficiency and good detection accuracy, effectively guarantees the factory quality of the filter, and is conducive to improving the market competitiveness and brand influence of the product.

[0005] In order to solve the above problems, the technical solutions adopted by the present invention are as follows:

[0006] A filter sealing test device comprises a lubricating oil smoke generator and a test tank; the test tank has a cavity for mounting a filter to be tested; a sealing cover plate for sealingly connecting to the filter to be tested is detachably and hermetically connected to the upper portion of the test tank; an exhaust pipe for communicating with the filter to be tested is provided on the sealing cover plate; a gas oil content detector is provided on the outlet end of the exhaust pipe; the lubricating oil smoke generator is connected to the cavity of the test tank via a smoke delivery pipe.

[0007] As a preferred embodiment of the present invention, rubber sealing gaskets are respectively provided between the sealing cover plate and the detection tank and the filter to be tested.

[0008] As a preferred embodiment of the present invention, a mounting hole matching the filter to be tested is provided on the top of the detection tank.

[0009] As a preferred embodiment of the present invention, a valve is provided on the smoke delivery pipe.

[0010] As a preferred embodiment of the present invention, the present invention also includes a moving device for moving the sealing cover plate, which is arranged on one side of the detection tank and connected to the sealing cover plate. Under the action of the moving device, the sealing cover plate can abut against the top of the detection tank or move away from the top of the detection tank.

[0011] As a preferred embodiment of the present invention, the moving device includes a moving bracket and a moving cylinder. The moving bracket is fixedly arranged on one side of the detection tank. The fixed end of the moving cylinder is fixedly arranged on the moving bracket, and the output end is fixedly connected to the sealing cover plate.

[0012] Further preferably, the movable bracket includes a vertically arranged fixed shaft and a connecting rod perpendicularly connected to the fixed shaft, and the connecting rod is rotatable around the fixed shaft; the fixed end of the movable cylinder is fixedly connected to the connecting rod.

[0013] As another preferred embodiment of the present invention, the moving device includes a motor, a hook and a hanging bracket with a pulley, one end of the hook is connected to the motor through a cable wrapped around the pulley, and the other end is detachably connected to the sealing cover.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The filter sealing detection device of the present invention is implemented by installing the filter to be tested in the enclosed space formed between the sealing cover and the detection tank, and then inputting a high concentration of oil and gas mixture into the detection tank through a lubricating oil smoke generator. The airflow passes through the outside and inside of the filter and is discharged from the exhaust pipe. Finally, the oil mist concentration of the exhaust gas in the exhaust pipe is detected by a gas oil content detector. If the gas oil content concentration value is greater than 3ppm, it can be determined that the filter has a bypass leakage problem caused by damaged filter material or poor glue sealing. It can be seen that the utility model detects the air tightness of the filter through smoke, which is simple and scientific to operate, has low detection cost, high detection efficiency and good detection accuracy, effectively guarantees the factory yield of the filter, and is beneficial to improving the market competitiveness and brand influence of the product. At the same time, the detection device has a simple structure, reasonable design and low cost, which is beneficial to reducing the production cost of the filter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic structural diagram of the filter sealing detection device according to the present invention;

[0017] Figure 2 This is a partial cross-sectional view of the filter sealing detection device of the present invention installed with the filter to be tested;

[0018] Explanation of the accompanying figures: 1. Lubricating oil smoke generator; 2. Detection tank; 3. Smoke conveying pipe; 4. Sealing cover; 5. Exhaust pipe; 6. Mobile bracket; 7. Mobile cylinder; 8. Valve; 9. Rubber sealing gasket. DETAILED DESCRIPTION

[0019] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0020] like Figure 1 As shown, the filter tightness test device provided by the present invention includes a lubricating oil smoke generator 1 and a test tank 2. The lubricating oil smoke generator 1 is connected to the test tank 2 through a smoke delivery pipe 3. The lubricating oil smoke generator 1 delivers a high-concentration oil-gas mixture into the test tank 2, and the high-concentration oil-gas mixture serves as the test medium for the air tightness of the filter to be tested. The test tank 2 has a cavity for mounting the filter to be tested, and a mounting hole is opened on the top of the test tank 2 to match the filter to be tested. Figure 2As shown, the flange of the filter under test is mounted within the mounting hole and positioned within the cavity, creating a sealed space between the outside of the filter under test and the sidewall of the test tank 2. This sealed space is connected to a smoke delivery pipe 3, which is equipped with a valve 8 for controlling the delivery of the oil-gas mixture. A sealing cover plate 4 is removably and hermetically connected to the upper portion of the test tank 2. This sealing cover plate 4 is used to seal the filter under test and is provided with an exhaust pipe 5. The inlet end of the exhaust pipe 5 is connected to the inside of the filter under test, and the outlet end is connected to the outside world. The outlet end of the exhaust pipe 5 is equipped with a gas oil content detector. The utility model installs the filter to be tested in the enclosed space formed between the sealing cover plate 4 and the detection tank 2, and then inputs a high concentration of oil and gas mixture into the detection tank 2 through the lubricating oil smoke generator 1. The air flow passes through the outside and inside of the filter and is discharged from the exhaust pipe 5. The gas coming out of the exhaust pipe 5 is relatively clean gas after filtration and separation by the filter. Therefore, the filter air tightness test can be carried out by detecting the oil mist concentration of the exhaust gas in the exhaust pipe 5 through the gas oil content detector. If the gas oil content concentration value is greater than 3ppm, it can be determined that the filter has a bypass leakage problem caused by damaged filter material or poor glue sealing. It can be seen that the utility model detects the air tightness of the filter through smoke, which is simple and scientific to operate, has low detection cost, high detection efficiency and good detection accuracy, effectively guarantees the qualified rate and factory good product rate of the filter, and is beneficial to improving the market competitiveness and brand influence of the product. At the same time, the detection device has a simple structure, reasonable design and low cost, which is beneficial to reducing the production cost of the filter.

[0021] In some embodiments, the lubricating oil mist generator 1 is modified from a lubricating oil vacuum pump. Simply remove the pump's built-in filter and adjust the intake valve 8 to a suitable opening and closing position. The pumped-out gas is a mist containing an oil-gas mixture with a certain concentration. In some embodiments, rubber sealing gaskets 9 are provided between the sealing cover plate 4 and the test tank 2, respectively, and the filter under test. These seals seal the upper and lower flanges of the filter under test, further improving detection accuracy.

[0022] In order to further improve the detection efficiency, the present invention also includes a moving device for moving the sealing cover plate 4, which can realize the rapid disassembly and assembly of the sealing cover plate 4 through the moving device. Specifically, the moving device is arranged on one side of the detection tank 2 and is connected to the sealing cover plate 4. Under the action of the moving device, the sealing cover plate 4 can be abutted against the top of the detection tank 2 or away from the top of the detection tank 2, so that the sealing cover plate 4 is easy to disassemble and assemble. In some embodiments, the moving device includes a moving bracket 6 and a moving cylinder 7. The moving bracket 6 is fixedly arranged on one side of the detection tank 2. The fixed end of the moving cylinder 7 is fixedly arranged on the moving bracket 6, and the output end is fixedly connected to the sealing cover plate 4. On the one hand, using the moving cylinder 7 to move the sealing cover plate 4 makes the sealing cover plate 4 easy to disassemble and assemble, greatly reducing the labor intensity of the operator. On the other hand, the moving cylinder 7 can pressurize the sealing cover plate 4, effectively improving the sealing performance of the connection between the sealing cover plate 4 and the detection tank 2 and the filter to be tested, which is conducive to further improving the detection accuracy. Preferably, the movable bracket 6 includes a vertically arranged fixed shaft and a connecting rod perpendicularly connected to the fixed shaft, and the connecting rod can rotate around the fixed shaft; the fixed end of the movable cylinder 7 is fixedly connected to the connecting rod, so that the sealing cover plate 4 can rotate around the fixed shaft away from the top of the detection tank 2, freeing up operating space to facilitate the removal or installation of the filter to be tested. Of course, in order to reduce the cost of the detection device, in other embodiments, the movable device may include a motor, a hook, and a lifting bracket with a pulley (not shown in the figure), one end of the hook is connected to the motor through a cable wrapped around the pulley, and the other end is detachably connected to the sealing cover plate 4. The sealing cover plate 4 is moved by the motor, which is conducive to further improving the efficiency of disassembly and assembly of the sealing cover plate 4, saving labor costs, and effectively reducing the detection cost.

[0023] The use process of the detection device of the utility model is as follows:

[0024] First, activate the mobile device switch to raise the sealing cover plate 4 and away from the top of the test tank 2. Then manually rotate and translate the sealing cover plate 4 to the side away from the test tank 2. Then install the oil-gas separation filter to be tested in the cavity of the test tank 2. Place a rubber sealing gasket 9 on the upper and lower sides of the flange of the oil-gas separation filter to be tested. Rotate and translate the sealing cover plate 4 back so that it is directly above the top of the test tank 2. Activate the mobile device to lower the sealing cover plate 4 to press the rubber sealing gasket 9 on the upper side of the flange of the filter to be tested, completing the correct installation of the filter to be tested. Turn on the lubricating oil smoke generator 1 and pump a high-concentration oil-gas mixture into the test tank 2 through the smoke delivery pipe 3. The airflow passes through the outside and inside of the filter to be tested and is discharged through the exhaust pipe 5. The oil concentration of the gas discharged from the exhaust pipe 5 is tested using a gas oil content detector. If the gas oil concentration is high and exceeds the normal standard, the filter is determined to have a quality problem of bypass leakage, possibly caused by damaged filter material or poor glue sealing. If the exhaust oil concentration value is ≤3ppm, the filter is determined to be good and does not have a quality problem of bypass leakage. After the test, the lubricating oil mist generator 1 and the valve 8 of the mist delivery pipe 3 are closed. The sealing cover plate 4 is raised using a movable device and then manually rotated and translated to the side away from the test tank 2. The tested filter is removed and the process is repeated to continue the airtightness test of the next filter.

[0025] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A filter sealing detection device, characterized in that: It includes a lubricating oil smoke generator and a detection tank; the detection tank has a cavity for installing the filter to be tested, the upper part of the detection tank is detachably sealed with a sealing cover plate for sealingly connecting to the filter to be tested, the sealing cover plate is provided with an exhaust pipe for communicating with the filter to be tested, and the outlet end of the exhaust pipe is provided with a gas oil content detector; the lubricating oil smoke generator is connected to the cavity of the detection tank through a smoke delivery pipe.

2. The filter sealing detection device according to claim 1, characterized in that: Rubber sealing gaskets are respectively provided between the sealing cover plate and the detection tank and the filter to be tested.

3. The filter sealing detection device according to claim 1 or 2, characterized in that: A mounting hole matching the filter to be tested is provided on the top of the detection tank.

4. The filter sealing detection device according to claim 1 or 2, characterized in that: The smoke conveying pipeline is provided with a valve.

5. The filter sealing detection device according to claim 1 or 2, characterized in that: The invention also includes a moving device for moving the sealing cover plate, which is arranged on one side of the detection tank and connected to the sealing cover plate. The sealing cover plate can be abutted against the top of the detection tank or away from the top of the detection tank under the action of the moving device.

6. The filter sealing detection device according to claim 5, characterized in that: The moving device includes a moving bracket and a moving cylinder. The moving bracket is fixedly arranged on one side of the detection tank. The fixed end of the moving cylinder is fixedly arranged on the moving bracket, and the output end is fixedly connected to the sealing cover plate.

7. The filter sealing detection device according to claim 6, characterized in that: The movable bracket includes a vertically arranged fixed shaft and a connecting rod vertically connected to the fixed shaft, and the connecting rod can rotate around the fixed shaft; the fixed end of the movable cylinder is fixedly connected to the connecting rod.

8. The filter sealing detection device according to claim 5, characterized in that: The moving device includes a motor, a hook and a hanging bracket with a pulley. One end of the hook is connected to the motor through a cable wound around the pulley, and the other end is detachably connected to the sealing cover plate.

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