Integrity detector for detecting filter performance

Abstract

The utility model relates to an integrity detector for detecting the performance of a filter. An air source is connected to one end of a regulating valve; the other end of the regulating valve is connected to one end of the air inlet valve; the other end of the air inlet valve is connected to one end of the tank valve; the other end of the air inlet valve is connected with a pressure sensor; the other end of the air inlet valve is connected with one end of an air outlet valve; the other end of the air outlet valve is connected to a to-be-tested filter; the other end of the air inlet valve is connected with one end of an exhaust valve; the other end of the exhaust valve is emptied; the other end of the tank valve is connected to a reference tank, and the reference tank works when detecting pressure attenuation and does not work when detecting bubble points, diffusion flow and water invasion. The technical problem that in the prior art, a conventional integrity detector is long in detection time is solved.

Description

Technical Field

[0001] The embodiment of the utility model relates to a filter detector, and in particular to an integrity detector for detecting filter performance. Background Art

[0002] Whether it is the manufacturer of the filter or the user of the filter, in the process of producing and using the filter, how to judge and determine whether the produced and used filters meet the technical requirements and use requirements, it is necessary to test the performance of the filter. At present, the most commonly used testing instrument is the integrity tester, which can detect the technical indicators of the filter such as bubble point, diffusion flow, pressure decay, water intrusion, etc. In the prior art, the conventional integrity tester needs to pass through the reference tank to keep the pressure stable during the test when testing the bubble point, diffusion flow, water intrusion and pressure decay. In this way, each test requires the reference tank to reach the normal pressure before the test can be carried out, which increases the test time. Utility Model Content

[0003] The purpose of the implementation mode of the utility model is to provide a method in which, except for detecting pressure decay, a reference tank is needed to maintain pressure stability. When detecting bubble points, diffusion flow and water intrusion, there is no need to use a reference tank to maintain pressure stability. This will greatly reduce the detection time, thereby meeting the detection time required for mass production.

[0004] In order to achieve the above-mentioned purpose, the embodiment of the utility model designs an integrity detector for detecting filter performance, comprising:

[0005] A regulating valve, a gas source being connected to one end of the regulating valve;

[0006] an air intake valve, the other end of the regulating valve being connected to one end of the air intake valve;

[0007] a tank valve, the other end of the inlet valve being connected to one end of the tank valve;

[0008] A pressure sensor connected to the other end of the intake valve;

[0009] An outlet valve, connected to one end of the outlet valve on the other end of the inlet valve;

[0010] A filter to be tested, connected to the filter to be tested at the other end of the air outlet valve;

[0011] An exhaust valve, one end of the exhaust valve is connected to the other end of the intake valve; the other end of the exhaust valve is emptied;

[0012] A reference tank, to which the other end of the tank valve is connected. The reference tank works when detecting pressure decay, but does not work when detecting bubble point, diffusion flow and water intrusion.

[0013] Furthermore, in the integrity tester for testing filter performance described in the utility model, the regulating valve is a servo flow regulating valve.

[0014] Furthermore, in the integrity detector for detecting filter performance described in the utility model, the pressure sensor is an electronic pressure sensor.

[0015] Furthermore, in the integrity tester for testing the performance of the filter described in the utility model, the regulating valve, the air inlet valve, the tank valve, the reference tank, the pressure sensor, the air outlet valve and the exhaust valve are all arranged in the housing of the tester.

[0016] Compared with the prior art, the implementation method of the utility model adopts a method in which a gas source is connected to one end of a regulating valve; the other end of the regulating valve is connected to one end of an air inlet valve; the other end of the air inlet valve is connected to one end of a tank valve; a pressure sensor is connected to the other end of the air inlet valve; the other end of the air inlet valve is connected to one end of an air outlet valve; the other end of the air outlet valve is connected to a filter to be tested; the other end of the air inlet valve is connected to one end of an exhaust valve; the other end of the exhaust valve is emptied; the other end of the tank valve is connected to a reference tank, which works when detecting pressure decay, but does not work when detecting bubble points, diffusion flows and water intrusions. The utility model provides a method in which, except for using a reference tank to maintain pressure stability when detecting pressure decay, there is no need to use a reference tank to maintain pressure stability when detecting bubble points, diffusion flows and water intrusions, thus greatly reducing the detection time, thereby meeting the detection time required for mass production; the problem in the prior art that conventional integrity detectors need to use a reference tank to maintain pressure stability during detection when detecting bubble points, diffusion flows, water intrusion and pressure decay, thus requiring the reference tank to reach normal pressure before detection each time, thus increasing the detection time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model; DETAILED DESCRIPTION

[0018] In order to make the purpose, technical scheme and advantages of the utility model clearer, the various embodiments of the utility model will be described in detail below with reference to the accompanying drawings. However, it can be understood by those skilled in the art that in the various embodiments of the utility model, many technical details are provided in order to enable readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical schemes claimed for protection in the claims of the present application can be implemented.

[0019] The embodiment of the utility model relates to an integrity detector for detecting filter performance, such as Figure 1 As shown, including:

[0020] The gas source is connected to one end of the regulating valve 1; the regulating valve 1 is used to adjust the pressure of the gas source;

[0021] The other end of the regulating valve 1 is connected to one end of the air intake valve 2; the air intake valve 2 is used to switch the air source;

[0022] The other end of the air inlet valve 2 is connected to one end of the tank valve 3; the tank valve 3 is used to switch the gas source entering the reference tank 4.

[0023] A pressure sensor 5 is connected to the other end of the inlet valve 2; the pressure sensor 5 is used to detect the pressure of the entire detector, so that the pressure entering the filter can be detected;

[0024] The other end of the inlet valve 2 is connected to one end of the outlet valve 6; the outlet valve 6 is used to control the gas source entering the filter;

[0025] The other end of the air outlet valve 6 is connected to a filter to be tested 7; the filter to be tested 7 is a filter used for testing;

[0026] The other end of the inlet valve 2 is connected to one end of the exhaust valve 8; the other end of the exhaust valve 8 is emptied; the exhaust valve 8 is mainly used to exhaust the gas of the entire detector after detection;

[0027] The other end of the tank valve 3 is connected to the reference tank 4, which works when detecting pressure decay and does not work when detecting bubble point, diffusion flow and water intrusion. The reference tank 4 is mainly used to maintain the stability of the gas pressure and gas flow of the gas source.

[0028] The present embodiment provides a method in which, in addition to using a reference tank to maintain pressure stability when detecting pressure decay, the bubble point, diffusion flow and water intrusion detection do not need to pass through the reference tank 4 to maintain pressure stability, which can greatly reduce the detection time, thereby meeting the detection time required for mass production; it solves the problem in the prior art that conventional integrity testers need to pass through the reference tank 4 to maintain pressure stability during detection when detecting bubble points, diffusion flows, water intrusion and pressure decay. In this way, each detection requires the reference tank 4 to reach normal pressure before detection can be carried out, which increases the detection time.

[0029] In order to achieve the above technical effects, the integrity detector for detecting filter performance in this embodiment is as follows: Figure 1 As shown, the regulating valve 1 is a servo flow regulating valve, which can control the flow of the gas source more accurately.

[0030] In order to achieve the above technical effects, the integrity detector for detecting filter performance in this embodiment is as follows: Figure 1 As shown, the pressure sensor 5 is an electronic pressure sensor, which can measure the pressure of the gas source more accurately.

[0031] In order to achieve the above technical effects, the integrity detector for detecting filter performance in this embodiment is as follows: Figure 1 As shown, the regulating valve 1 , the air inlet valve 2 , the tank valve 3 , the reference tank 4 , the pressure sensor 5 , the air outlet valve 6 and the exhaust valve 8 are all arranged in the detector housing 10 .

[0032] The utility model provides a testing method for an integrity detector for detecting filter performance, such as Figure 1 As shown, the main test methods are to detect the bubble point value of the filter through the bubble point detection method; to detect the diffusion flow value of the filter through the diffusion flow detection method; to detect the water intrusion value of the filter through the water intrusion detection method; and to detect the pressure decay value through the pressure decay detection method.

[0033] The bubble point detection method also includes the following steps: first completely infiltrate the filter 7 to be tested, infiltrate the hydrophilic filter with pure water; infiltrate the hydrophobic filter with ethanol; connect the outlet pipe 9 on the outlet valve 6 to the top of the filter 7 to be tested that is filled with the infiltration liquid upstream; open the gas source to adjust the air intake speed through the regulating valve 1, open the air intake valve 2 and the air outlet valve 6 in turn, so that the gas enters the filter 7 to be tested, and observe the pressure change through the pressure sensor 5. When the air pressure passes through the filter 7 to be tested, the instrument connected to the pressure sensor 5 automatically reads the corresponding pressure value, which is the bubble point value of the filter. After the detection is completed, close the air intake valve 2, open the exhaust valve 8, exhaust the gas, and the detection is completed.

[0034] The diffusion flow detection method also includes the following steps: first completely infiltrate the filter 7 to be tested, infiltrate the hydrophilic filter with pure water, and do not measure the diffusion flow of the hydrophobic filter, and connect the outlet pipe 9 on the outlet valve 6 to the top of the filter 7 to be tested that is filled with the infiltration liquid upstream; open the air source and adjust it through the regulating valve 1 to connect it to the top of the filter 7 to be tested that is filled with the infiltration liquid upstream, open the air source and adjust the air intake speed through the regulating valve 1, open the air intake valve 2 and the air outlet valve 6 in turn to allow the gas to enter the filter 7 to be tested, observe the pressure change through the pressure sensor 5, and adjust the air outlet valve 6 so that the pressure entering the filter 7 to be tested is stably maintained at 80% of the bubble point value, collect the diffused gas downstream of the filter 7 to be tested, and calculate the gas volume, which is the diffusion flow value of the filter 7 to be tested. After the detection is completed, close the air intake valve 2, open the exhaust valve 8, exhaust the gas, and the detection is completed.

[0035] The water intrusion detection method also includes the following steps: the filter 7 to be tested is a hydrophobic filter and does not need to be wetted, and the outlet pipe 9 on the outlet valve 6 is connected to the top of the filter 7 to be tested which is filled with pure water upstream; the gas source is opened to adjust the air intake speed through the regulating valve 1, and the air intake valve 2 and the air outlet valve 6 are opened in sequence to allow the gas to enter the filter 7 to be tested, and the pressure change is observed through the pressure sensor 5, and the air outlet valve 6 is adjusted so that the pressure entering the filter 7 to be tested is stably maintained at a fixed value, and the diffused pure water is collected downstream of the filter 7 to calculate the amount of pure water, which is the water intrusion value of the filter 7 to be tested. After the detection is completed, the air intake valve 2 is closed, the exhaust valve 8 is opened, the gas is exhausted, and the detection is completed.

[0036] The pressure decay detection method also includes the following steps: first completely infiltrate the filter 7 to be tested, infiltrate the hydrophilic filter with pure water, and do not measure the pressure decay of the hydrophobic filter; connect the outlet pipe 9 on the outlet valve 6 to the top of the filter 7 to be tested that is filled with the infiltration liquid upstream, open the gas source and adjust the air intake speed through the regulating valve 1, open the air intake valve 2, the tank valve 3, and the outlet valve 6 in turn to allow the gas to enter the filter 7 to be tested, observe the pressure change through the pressure sensor 5, adjust the tank valve 3 to stabilize the pressure, and adjust the outlet valve 6 to make the pressure entering the filter 7 to be tested stably maintained at 80% of the bubble point value, after maintaining for 5-10 minutes, calculate the pressure decay value, close the air intake valve 2 after the detection, open the exhaust valve 8, exhaust the gas, and complete the detection.

[0037] The above-mentioned test method of the implementation mode of the utility model requires a reference tank to keep the pressure stable when detecting pressure decay, and does not need to pass through a reference tank to keep the pressure stable when detecting bubble point, diffusion flow and water intrusion.

[0038] The reference tank 4 works when detecting pressure decay, and does not work when detecting bubble points, diffusion flows and water intrusion. This embodiment provides a method in which, except for using a reference tank to maintain pressure stability when detecting pressure decay, the reference tank 4 is not required to maintain pressure stability when detecting bubble points, diffusion flows and water intrusion. This will greatly reduce the detection time, thereby meeting the detection time required for mass production; it solves the problem in the prior art that conventional integrity detectors need to pass through the reference tank 4 to maintain pressure stability during detection when detecting bubble points, diffusion flows, water intrusion and pressure decay. In this way, each detection requires the reference tank 4 to reach normal pressure before detection can be carried out, which increases the detection time.

[0039] Those skilled in the art will appreciate that the above-mentioned embodiments are specific examples for implementing the present invention, and in actual applications, various changes may be made thereto in form and detail without departing from the spirit and scope of the present invention.

Claims

1. An integrity tester for testing filter performance, characterized in that: include: A regulating valve (1), a gas source connected to one end of the regulating valve (1); An air intake valve (2), wherein the other end of the regulating valve (1) is connected to one end of the air intake valve (2); a tank valve (3), the other end of the air inlet valve (2) being connected to one end of the tank valve (3); A pressure sensor (5), connected to the other end of the intake valve (2); An outlet valve (6) connected to one end of the outlet valve (6) at the other end of the inlet valve (2); A filter to be tested (7), connected to the filter to be tested (7) at the other end of the gas outlet valve (6); An exhaust valve (8), one end of the exhaust valve (8) is connected to the other end of the intake valve (2); the other end of the exhaust valve (8) is emptied; A reference tank (4), to which the other end of the tank valve (3) is connected. The reference tank (4) works when detecting pressure decay, but does not work when detecting bubble point, diffusion flow and water intrusion.

2. The integrity tester for testing filter performance according to claim 1, characterized in that: The regulating valve (1) is a servo flow regulating valve.

3. The integrity tester for testing filter performance according to claim 1, characterized in that: The pressure sensor (5) is an electronic pressure sensor.

4. The integrity tester for testing filter performance according to claim 1, characterized in that: The regulating valve (1), the air inlet valve (2), the tank valve (3), the reference tank (4), the pressure sensor (5), the air outlet valve (6) and the exhaust valve (8) are all arranged in a detector housing (10).

Images