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CN-121994422-A - High-efficiency filter tightness testing device and testing method

CN121994422ACN 121994422 ACN121994422 ACN 121994422ACN-121994422-A

Abstract

The invention discloses a high-efficiency filter tightness testing device and a testing method in the technical field of filter tightness detection, and aims to solve the problems of poor detection results caused by position limitation and content limitation in a traditional aerosol detection mode in the prior art. The device comprises a fixed bracket, wherein an annular air chamber and a breaking air chamber positioned below the annular air chamber are fixedly arranged on the fixed bracket, the annular air chamber is of a hollow annular structure, the breaking air chamber comprises a partition plate for dividing an inner cavity of the breaking air chamber into two parts, a testing assembly and a filter to be tested are fixedly arranged above the annular air chamber, the testing assembly comprises an air supply pipe for supplying air containing aerosol, and the air supplied by the air supply pipe is communicated with the inner cavity of the annular air chamber through the filter to be tested; the invention is used for the tightness test of the high-efficiency filter, and can realize the accumulation of aerosol in the test work so as to be more beneficial to detection, thereby improving the accuracy of leakage judgment and providing more reliable basis.

Inventors

  • LI SHUIXING

Assignees

  • 苏州国立洁净技术有限公司

Dates

Publication Date
20260508
Application Date
20260408

Claims (10)

  1. 1. The utility model provides a high-efficient filter leakproofness testing arrangement, its characterized in that includes fixed bolster (1), fixed mounting has annular plenum (2) and divides wind chamber (4) that are located annular plenum (2) below on fixed bolster (1), annular plenum (2) wholly take on hollow annular structure, divide wind chamber (4) including being used for dividing into the baffle of dividing into two in the inner chamber of wind chamber (4), fixed being provided with test module (3) and filter under test in the top of annular plenum (2), test module (3) including being used for supplying air supply pipe (303) that contain the aerosol gas, the gas that air supply pipe (303) supplied is linked together with the inner chamber of annular plenum (2) through the filter under test, the lower extreme of annular plenum (2) and the upper end of dividing wind chamber (4) are provided with hollow rotation recess, hollow rotation recess internal rotation is provided with second filter (5), still be provided with on fixed bolster (1) and be used for driving second filter (5) pivoted baffle, the filtration inner chamber (5) of second filter (5) are located the filtration inner chamber (2) of cutting off the upper filter surface and the filtration chamber of wind chamber (4) and the laminating of cutting off under the filter, one of the inner cavities of the breaking air chamber (4) is communicated with an air inlet pipe (7) and the other inner cavity is communicated with an exhaust pipe (8), a pressure air pipe (9) positioned on the tangential position of the inner cavity of the annular air chamber (2) is installed on the annular air chamber (2), a photometer assembly (12) for detecting the aerosol content in the inner cavity of the annular air chamber (2) is arranged on the annular air chamber (2), and a light source (10) for supplementing light to the detection position of the photometer assembly (12) is also arranged on the annular air chamber (2).
  2. 2. The high-efficiency filter tightness testing device according to claim 1, wherein the detection direction of the photometer assembly (12) is positioned in the tangential direction of the inner wall of the annular air chamber (2), and the irradiation direction of the light source (10) is perpendicular to the detection direction of the photometer assembly (12).
  3. 3. The high-efficiency filter tightness testing device according to claim 1, wherein the testing assembly (3) further comprises a storage groove (301) for positioning a filter to be tested, the filter to be tested is in fit contact with the inner wall surface of the storage groove (301), a storage cover (302) is hinged to the side wall of the storage groove (301), the storage cover (302) can cover the storage groove (301) to form a closed cavity, the air supply pipe (303) is mounted on the storage cover (302) and can be communicated with the closed cavity, and the bottom of the storage groove (301) can be communicated with the inner cavity of the annular air chamber (2).
  4. 4. A high-efficiency filter tightness testing device according to claim 3, wherein an auxiliary air inlet assembly is arranged at the bottom of the accommodating groove (301), the auxiliary air inlet assembly comprises a plurality of communicating pipes (13) communicated with the bottom of the accommodating groove (301), air inlets are formed in the side walls of the communicating pipes (13), mounting blocks (14) are mounted at the lower end positions of the communicating pipes (13), each mounting block (14) is connected with a piston (16) through a spring (15), and each piston (16) is slidably arranged in the corresponding communicating pipe (13).
  5. 5. The device for testing tightness of high efficiency filter according to claim 4, wherein the bottom surface of the inner wall of the receiving groove (301) is provided with a supporting block for supporting the filter to be tested, so that the bottom surface of the filter to be tested and the bottom surface of the inner cavity of the receiving groove (301) are formed with supporting cavities.
  6. 6. The high efficiency filter tightness test apparatus as defined in claim 5, wherein the receiving groove (301) is further provided with an auxiliary air pipe (18) capable of communicating with the supporting cavity.
  7. 7. A high efficiency filter tightness test apparatus according to claim 1, wherein the side wall of the annular air chamber (2) is further provided with an exhaust pipe (17).
  8. 8. A method for testing the tightness of a high-efficiency filter by using the tightness testing device as claimed in any one of claims 1 to 7, characterized in that the method comprises the following steps: The gas supply pipe (303) is used for introducing gas to be tested containing aerosol, so that the gas sequentially passes through the filter to be tested, the inner cavity of the annular air chamber (2) and the second filter (5), and the gas is finally discharged through the exhaust pipe (8); Keeping the second filter (5) in a rotating state, and back-blowing the second filter (5) through an air inlet pipe (7); supplying air flow in the tangential direction of the inner cavity of the annular air chamber (2), so that the air flow can form annular air flow through the annular inner cavity of the annular air chamber (2); And detecting the content of the aerosol contained in the annular airflow by a photometer assembly (12) under the condition of ensuring light supplementing after the rated time.
  9. 9. The method for testing the tightness of the efficient filter according to claim 8, wherein after the measurement of the aerosol content is completed, an air supply passage of the air supply pipe (303) and an air exhaust passage of the air exhaust pipe (8) are closed, a back blowing air inlet state of the air inlet pipe (7) and an air supply state of the pressure air pipe (9) are maintained, and air in the annular air chamber (2) is pumped out through an air exhaust pipe (17) arranged on the side wall of the annular air chamber (2) until the photometer assembly (12) does not detect luminescent particles any more.
  10. 10. The method for testing the tightness of the efficient filter according to claim 8 is characterized by monitoring the air pressure of the air inlet side of the filter to be tested, the inner cavity of the annular air chamber (2) and the air outlet pipe (8) in real time, and ensuring that the air pressure of the air inlet side of the filter is always larger than the air pressure in the cavity of the annular air chamber (2) and the air pressure in the cavity of the annular air chamber (2) is always larger than the air pressure in the pipeline of the air outlet pipe (8) in the working process.

Description

High-efficiency filter tightness testing device and testing method Technical Field The invention relates to a high-efficiency filter tightness testing device and a testing method, and belongs to the technical field of filter tightness testing. Background The high-efficiency filter is a core component for filtering air, can realize high-efficiency interception of fine particles in the air through physical interception, and is widely popularized and applied in the field of air purification. The structure of the high-efficiency filter mainly comprises folded filter paper and a supporting frame, however, in the folding process of the filter paper, because the damage of the local structure of the filter paper can be caused by the improper gluing position, and a gap which is very difficult to observe can be generated in the packaging process, so that the filter paper filtering function can not be ensured, therefore, before the high-efficiency filter is shipped, the high-efficiency filter is usually required to be subjected to tightness detection, the leakage problem of the filter paper is usually judged by detecting the content of aerosol in the downstream of an interception surface after the aerosol passes through the filter paper by utilizing the gas containing the aerosol, but in the way, a photometer for detecting the aerosol needs to be subjected to wide-area scanning judgment under a larger filter, the judgment is inaccurate due to the fact that the position of the leakage is easy to exist in terms of tiny leakage, and the instantaneous scanning is difficult to judge the leakage degree according to the leakage amount, so that the leakage degree still has a certain limitation in the practical detection work. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a high-efficiency filter tightness testing device and a testing method, which are used for testing tightness of a high-efficiency filter, and can realize accumulation of aerosol in testing work so as to be more beneficial to detection, thereby improving the accuracy of leakage judgment and providing a more reliable basis. In order to achieve the above purpose, the invention is realized by adopting the following technical scheme: The invention provides a high-efficiency filter tightness testing device which comprises a fixed support, wherein an annular air chamber and a breaking air chamber positioned below the annular air chamber are fixedly arranged on the fixed support, the annular air chamber is of a hollow annular structure, the breaking air chamber comprises a partition plate for dividing the inner cavity of the breaking air chamber into two parts, a testing component and a filter to be tested are fixedly arranged above the annular air chamber, the testing component comprises an air supply pipe for supplying gas containing aerosol, the gas supplied by the air supply pipe is communicated with the inner cavity of the annular air chamber through the filter to be tested, a hollow rotating groove is formed in the lower end of the annular air chamber and the upper end of the breaking air chamber, a second filter is arranged in the hollow rotating groove in a rotating way, a driving component for driving the second filter to rotate is further arranged on the fixed support, the upper filtering surface of the second filter is positioned in the inner cavity of the annular air chamber, the lower filtering surface of the second filter and the two separated inner cavities are in sealing and contact, one inner cavity of the breaking air chamber is communicated with an air inlet pipe, the other inner cavity is communicated with an air supply pipe, the annular air chamber is provided with an air chamber, the annular air chamber is provided with an annular pressure air chamber and an annular light source component for detecting the annular light source is arranged on the annular air chamber, and the annular pressure light source component is arranged on the annular air chamber and is used for detecting the position of the annular light source. Specifically, the detection direction of the photometer component is positioned in the tangential direction of the inner wall of the annular air chamber, and the irradiation direction of the light source is perpendicular to the detection direction of the photometer component. Specifically, the test assembly is still including being used for the location filter that awaits measuring accomodates the groove, the filter that awaits measuring and the interior wall laminating contact of accomodating the groove, accomodate the articulated lid that is provided with of lateral wall in groove, accomodate the lid and cover on accomodating the groove in order to form closed cavity, the air supply pipe is installed and is accomodate and cover and can form the intercommunication with closed cavity, accomodate the bottom of groove and the inner chamber intercommunication of annular plenum. Speci