CN207540940U - A kind of filtering material or filter element air permeability detector - Google Patents

Abstract

The utility model discloses a filter material or filter element air permeability detector, which is sequentially provided with a decompression and purification component connected through pipelines, a dedusting, oil and water purification device, a decompression device, a flow regulating device, The test piece clamping device and flow measuring device, the decompression purification component is connected to the external compressed air source through the pipeline, the test piece is clamped between the test piece clamping devices, the air inlet cavity and the air outlet of the test piece clamping device The cavity is respectively connected with an inlet pressure measuring tube and an outlet pressure measuring tube, and a pressure difference measuring device is connected between the inlet pressure measuring tube and the outlet gas pressure measuring tube, and the flow regulating device, the flow measuring device and the pressure difference measuring device They are respectively connected with the test control system through lines. The utility model has the advantages of simple structure and small equipment volume, and can quickly detect the air permeability of the filter material.

Description

Air permeability tester for filter material or filter element

technical field

The utility model belongs to the technical field of testing equipment, in particular to an air permeability detector for filter materials or filter elements.

Background technique

Filter material is one of the necessary raw materials in the production of filter elements, which plays the role of filtering impurities, and one of its important parameters is air permeability. The more common filter materials are: purification dust filter, lubricating oil filter, dust recovery filter, hydraulic oil filter, air filter, air conditioning filter, oil filter and fuel filter, corresponding to each Filter elements or filters basically filter impurities in air or liquids. The filter material has high filtration performance, long service life, high durability, vibration and durability, is not easy to cause dust leakage, has good water resistance, does not block the entry of air, and is easy to load and unload. The application of filter materials includes the following aspects: 1. Car air filters filter out harmful impurities and organic gases outside the car, such as smog, VOC gases, etc.; 2. Masks protect the human respiratory system from smog, poisonous 3. Dust removal filter element, environmental governance, reducing pollution emissions; 4. Dust recovery, concrete mixing, equipment coating and other dust recycling, energy saving and environmental protection.

The air permeability of the filter material is one of the important filtration performance indicators of the filter material. It is one of the items that must be checked in the process of filter element production, filter material production research and development, and filter material delivery and acceptance. Its air permeability will also change with the product. The air permeability of the filter material cannot be visually inspected by the naked eye. At present, most air permeability measurements on the market use negative pressure, that is, a fan pumps air, and the outside air (in the test environment) passes through the filter material. If the filter material has a high precision, it will affect the test results. Particle pollutants in the environment Directly attached to the surface and inside of the filter material, it may even block a part of the filter gap, which will affect the test results. In a relatively clean room, there will be relatively large deviations. If the environment is worse, the impact on the results will be more serious. The cost of environmental protection treatment will be high, and these situations can be avoided if positive pressure testing is used. Ordinary air permeability test is carried out in a relatively closed and clean room. The color of the place where the gas passes through the surface of the filter material is obviously darkened. If positive pressure is used, there is no such phenomenon. Therefore, it is necessary to design a filter material air permeability detector using positive pressure to quickly detect the air permeability of the filter material, and it has certain guiding significance for filter element production and filter material manufacturers, and is more beneficial to users. Safety of use.

Contents of the invention

The technical problem solved by the utility model is to provide a filter material or filter element air permeability detector with simple structure, small equipment volume and fast detection.

In order to solve the above technical problems, the utility model adopts the following technical scheme, a filter material or filter element air permeability detector, which is characterized in that along the air intake direction, there are decompression purification components connected by pipelines, dust removal, oil removal and water removal Purification device, decompression device, flow adjustment device, test piece clamping device and flow measuring device, the decompression purification component is connected to the external compressed air source through the pipeline, the test piece is clamped between the test piece clamping devices, and the test piece The inlet cavity and the outlet cavity of the clamping device are respectively connected with an inlet pressure measuring tube and an outlet pressure measuring tube, and a pressure difference measuring device is connected between the inlet pressure measuring tube and the outlet pressure measuring tube. The regulating device, the flow measuring device and the differential pressure measuring device are respectively connected with the test control system through lines.

Further preferably, the end of the flow measuring device is connected to a muffler, and the muffler communicates with the outside atmosphere to form an atmospheric pressure equal to the outlet of the flow measuring device.

Further preferably, the test piece is filter paper, filter cloth, filter screen, sheet filter material or sheet filter element.

Compared with the prior art, the utility model has the following beneficial effects: the utility model adopts positive pressure test, has an automatic control test function, provides accurate and efficient test results, and can test the flow resistance of filter materials. Important functions that are not available; the utility model has simple structure, small equipment volume, can quickly detect the air permeability of the filter material, and has a certain guiding significance for the production of filter elements and filter material manufacturers, and is more conducive to users through the use of The device detects the air permeability of the filter material to further evaluate the safety of the use of the filter material.

Description of drawings

Fig. 1 is the structural representation of the utility model.

In the figure: 1-Pipeline, 2-Decompression and purification components, 3-Dust removal, oil and water purification device, 4-Decompression device, 5-Flow adjustment device, 6-Test piece clamping device, 7-Test piece , 8-flow measuring device, 9-muffling device, 10-outlet pressure measuring tube, 11-pressure differential measuring device, 12-intake pressure measuring tube, 13-test control system.

Detailed ways

The specific content of the utility model is described in detail in conjunction with the accompanying drawings. A filter material or filter element air permeability tester, which is sequentially provided with a decompression purification component 2 connected through a pipeline 1, a dedusting, oil and water purification device 3, a decompression device 4, a flow regulating device 5, The test piece clamping device 6 and the flow measurement device 8, the decompression purification assembly 2 are connected to the external compressed air source through the pipeline 1, and the end of the flow measurement device 8 is connected to the noise reduction device 9, which communicates with the outside atmosphere to form a The outlet of the flow measuring device 11 is equal to the atmospheric pressure, and the test piece 7 is clamped between the test piece clamping device 6, and the inlet cavity and the gas outlet cavity of the test piece clamping device 6 are respectively connected with an inlet pressure measuring tube 12 And the outlet pressure measuring tube 10, the inlet pressure measuring tube 12 and the outlet pressure measuring tube 10 are connected with a pressure difference measuring device 11, and the flow regulating device 5, the flow measuring device 8 and the pressure difference measuring device 11 pass through the circuit and the pressure difference measuring device 11 respectively. The test control system 13 is connected.

The working principle of the utility model is: the external compressed air source enters the decompression purification assembly 2 through the pipeline 1 for decompression, and then enters the dust removal, oil, and water purification device 3 to remove larger particles of oil mist and water droplets, and the air source is decompressed. After further processing to achieve the purpose of not affecting the test results, it then enters the decompression device 4, adjusts the flow regulating device 5 according to the test needs, and the adjusted gas enters the test piece clamping device 6, and the test piece clamping device 6 can be adjusted according to the process. The different structures of the test piece 7 are designed, and then the clamping of the test piece 7 (including various cylinders, cuboids, cubes and irregular shaped filter elements) can be completed. The inlet cavity and the outlet cavity are respectively connected with an inlet pressure measuring tube 12 and an outlet pressure measuring tube 10, and a pressure difference measuring device 11 is connected between the inlet pressure measuring tube 12 and the outlet pressure measuring tube 10. The test gas of the clamping device 6 enters the flow measuring device 8 through the pipeline 1, and then enters the muffler 9, and the muffler 9 communicates with the outside atmosphere to form an atmospheric pressure equal to the outlet of the flow measuring device 8.

During the test, adjust the flow regulating device 5. Since the effective area of the test piece 7 is known and assumed to be c, when the flow per unit area is fixed values such as E, F, G, etc., the corresponding flow rates are E _c , F _c , G _c , according to the formula

Y=aX+b

When X is different flow rate E, F, G under a certain pressure, Y corresponds to E _c , F _c , G _c , and then find a and b, and then bring a and b into the above formula, such as 200Pa under the specified pressure The result of the time test is the air permeability value of the test piece 7 to be tested. The test control system 13 can automatically control the flow measuring device 8, the differential pressure measuring device 11 and the flow regulating device 5 to perform automatic tests and draw relevant curves and reports according to the test results, and then store and print them.

In addition, the most important function is that it can test any range of flow resistance under air source pressure, or test the corresponding flow rate under fixed flow resistance, providing more reliable testing equipment for product material selection or product testing.

The basic principles, main features and advantages of the present utility model have been shown and described above. On the premise of not departing from the spirit and scope of the present utility model, the present utility model also has various changes and improvements, and these changes and improvements all fall into the claims. The scope of the utility model.

Claims (3)

1. a kind of filtering material or filter element air permeability detector, it is characterised in that be equipped with successively along airintake direction and pass through pipeline Connected pressure reducing purifying component, dedusting oil removing except water purification installation, decompressor, flow regulator, test specimen chucking device and Flow measurement device, pressure reducing purifying component are connect by pipeline with external compression air source, and test specimen chucking device is clamped in by test specimen Between, it is connected separately with air inlet pressure-measuring pipe and outlet pressure-measuring pipe, air inlet on the air inlet cavity of test specimen chucking device and outlet cavity Differential pressure measurement device, the flow regulator, flow measurement device and pressure difference are connected between pressure-measuring pipe and outlet pressure-measuring pipe Measuring device is connected respectively by circuit with test control system.

2. filtering material according to claim 1 or filter element air permeability detector, it is characterised in that：The flow is surveyed The end of amount device is connected with silencing means, which communicates to be formed with ambient atmosphere is equal with flow measurement device outlet Atmospheric pressure.

3. filtering material according to claim 1 or filter element air permeability detector, it is characterised in that：It is described by test specimen For filter paper, filter cloth, strainer, sheet-like filter material or sheet-like filter element.