A filter element integrity testing device

Abstract

The present invention discloses a filter element integrity testing device, which belongs to the field of filter element testing. A filter element integrity testing device includes a test water tank and a video microscope fixed on the top of its side wall, and also includes a lifting sleeve, the top of the side wall of the test water tank is fixedly connected to an electric push rod, the lifting sleeve is fixed to the bottom of the telescopic end of the electric push rod, and both sides of the lifting sleeve are slidably connected to a clamping rod; the present invention drives the filter element as a whole to rotate in the liquid through the friction between the driven wheel and the driving wheel, so that the filter element is fully immersed, ensuring the accuracy of the filter element integrity test, and at the same time, with the setting of the push-pull disk, push-pull rod and piston plate, gas can be continuously filled into the filter element. At this time, the low-pressure area on the top of the filter element is detected in real time by using the video microscope, and the bubble distribution on its surface is observed to evaluate the integrity and filtration accuracy of the filter element, thereby improving the test effect.

Description

Technical Field

[0001] The present invention relates to the technical field of filter element testing, and in particular to a filter element integrity testing device. Background Art

[0002] With the advancement of science and technology and the development of industry, filters are being used more and more widely in various fields, from pharmaceuticals and bioengineering to the food and beverage industry, and then to environmental management. Filter integrity testing is a key detection method to ensure that the filter element can effectively intercept microorganisms, particulate matter and other pollutants during the filtration process. The test results are directly related to the quality and safety of the final product.

[0003] Existing filter element integrity tests include the following types: bubble point test: evaluates the maximum pore size and integrity of the filter element by detecting the pressure value when bubbles begin to appear on the filter element surface; diffusion flow test: judges the effectiveness of the filter element based on the diffusion flow generated when gas passes through the wet filter membrane; water intrusion test: used to check the integrity of hydrophilic filter elements, and is evaluated by measuring the pressure change required for water to enter the filter element.

[0004] At present, when conducting filter element integrity testing, the filter element is not fully wetted, resulting in the gas not being able to evenly pass through the filter element membrane pores when the filter element is filled with gas, which reduces the accuracy of the test results. In addition, the existing integrity testing equipment cannot realistically simulate the filter element usage environment, resulting in insufficient representativeness of the test results and reducing the accuracy of the test results. Therefore, a filter element integrity testing device is proposed. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem of insufficient infiltration of the filter element in the prior art, and the inability to more realistically simulate the use environment of the filter element, thereby reducing the accuracy of the test results, and to propose a filter element integrity testing device.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A filter element integrity testing device comprises a test water tank and a video microscope fixed on the top of its side wall, and also comprises a lifting sleeve, the top of the side wall of the test water tank is fixedly connected to an electric push rod, and the lifting sleeve is fixed to the bottom of the telescopic end of the electric push rod, wherein both sides of the lifting sleeve are slidably connected to clamping rods, and the other ends of the two groups of clamping rods are fixedly connected to positioning rings, and a test seat is rotatably connected in the positioning rings, and a driving part for driving the test seat to rotate is provided on the test water tank; a guide groove is opened in the test seat on one side, and the guide groove is connected to the inner cavity of the positioning ring on the same side, and the test water tank is provided with a guide part for conveying fluid into the guide groove; a jet assembly, the jet assembly is arranged in the test water tank, and the jet assembly is used to spray a columnar water flow to the filter element fixed between the two groups of test seats.

[0008] In order to achieve comprehensive testing and improve the accuracy of the test results, preferably, the driving part includes a driving shaft, which is rotatably connected to the inner wall of the test water tank, and driving wheels are fixedly connected on both sides of the driving shaft. The end of the test seat is fixedly connected to a driven wheel, and the driving wheel and the driven wheel are aligned up and down. The bottom of the test water tank is fixedly connected to a driving motor, and the output shaft of the driving motor and the outer end of the driving shaft are connected via a pulley set.

[0009] In order to facilitate the simulation of dynamic detection environment and improve the test accuracy, preferably, the guide part includes a piston box, which is on the outer wall of the test water tank, and a piston plate is slidably connected to the piston box. The other outer end of the drive shaft is fixedly connected to a push-pull disk, and a push-pull rod is rotatably connected to the side wall of the push-pull disk through a pin shaft. The top of the piston plate is fixedly connected to a hinge seat, and the other end of the push-pull rod is rotatably connected to the hinge seat. The lower part of the side wall of the piston box is fixed and connected to a flow-pushing tube, and the other end of the flow-pushing tube is connected to the inner cavity of the positioning ring close to the piston box.

[0010] Furthermore, an air supply pipe is fixed on and connected to the side wall of the piston box, the top end of the air supply pipe is fixedly connected to a hopper, and a one-way valve is provided in both the air supply pipe and the flow-pushing pipe.

[0011] In order to achieve the recycling of water flow, preferably, a liquid guide tube is fixed and connected between the test water tank and the bottom of the inner cavity of the piston box, a filter box is fixed and connected to the liquid guide tube, a filter plate is fixedly connected to one side of the inner cavity of the filter box at the output end of the liquid guide tube, and a solenoid valve is provided at the end of the liquid guide tube close to the piston box.

[0012] In order to improve the effectiveness and accuracy of the test, preferably, the jet assembly includes a movable seat, the middle section of the drive shaft is fixedly connected to a reciprocating screw, the movable seat is threadedly sleeved on the reciprocating screw, and the bottom of the movable seat fits with the inner bottom of the test water tank, and both sides of the movable seat are fixedly connected with a jet head, a jet groove is opened in the movable seat, the inner cavity of the jet head is connected to the jet groove, and the piston box is provided with a thrust part that continuously delivers thrust to the jet groove.

[0013] Furthermore, the flow-pushing part includes two groups of piston cylinders, and the two groups of piston cylinders are respectively fixed on both sides of the bottom of the piston box, and a pressure plate is slidably connected in the piston cylinder, and a return spring is fixedly connected between the bottom of the pressure plate and the bottom of the piston cylinder, and the top of the pressure plate is fixedly connected to an extrusion rod, and the bottom of the test water tank is fixedly connected to a pressure accumulation box, and the side wall of the pressure accumulation box is fixed and connected with an injection pipe, and the other end of the injection pipe is connected to the inner cavity of the jet groove, and the bottoms of the two groups of piston cylinders are fixed and connected with a liquid pushing pipe, and the other end of the liquid pushing pipe is connected to the inner cavity of the pressure accumulation box.

[0014] Furthermore, the bottoms of the two groups of piston cylinders are connected by a fluid infusion tube, and a fluid extraction tube is fixed on and connected to the fluid infusion tube. The other end of the fluid extraction tube is connected to the inner cavity of the fluid guide tube, and the connection point is located between the solenoid valve and the filter box provided on the fluid guide tube. A one-way valve is provided in the end of the fluid extraction tube close to the fluid guide tube, and a one-way valve is provided in the end of the fluid push tube close to the piston cylinder.

[0015] In order to achieve self-clamping and improve test stability, preferably, a decompression channel is opened in the clamping rod close to the driving motor side, and the two ends of the decompression channel are respectively connected to the lifting sleeve and the inner cavity of the positioning ring connected thereto, and the top of the positioning ring is fixed and connected to a pressure relief pipe, and the side walls of the clamping rod on both sides are fixedly connected with positioning sliders, and the positioning sliders slide in contact with the inner wall of the test water tank.

[0016] Preferably, a drain pipe is fixedly connected to the lower portion of the side wall of the filter box, and a solenoid valve is provided on the drain pipe.

[0017] Compared with the prior art, the present invention provides a filter element integrity testing device with the following beneficial effects:

[0018] 1. This filter element integrity test device drives the entire filter element to rotate in the liquid through the friction between the driven wheel and the driving wheel, so that the filter element is fully infiltrated, ensuring the accuracy of the filter element integrity test. At the same time, with the setting of the push-pull disk, push-pull rod and piston plate, gas can be continuously filled into the filter element. At this time, a video microscope is used to perform real-time detection of the low-pressure area on the top of the filter element and observe the distribution of bubbles on its surface to evaluate the integrity and filtration accuracy of the filter element, thereby improving the test effect.

[0019] 2. The filter integrity test device continuously circulates ultrapure water into the filter element and carries a certain amount of microparticles into the filter element to simulate the dynamic flow environment of water inside the filter element, which is more in line with its actual application environment, so as to more realistically evaluate the filtering effect of the filter element and improve the accuracy of the filter element test results. Finally, the ratio of the leaked microparticles to the initial injection amount is calculated to obtain the filtering performance of the filter element and realize a comprehensive evaluation of the filtering effect of the filter element.

[0020] 3. The filter integrity test device simulates the dynamic conditions of different flow and pressure conditions encountered when the filter element is used by generating a water column that continuously sprays toward the filter element in the test water tank, which more accurately reflects the performance of the filter element in actual use. At the same time, it can remove microparticles attached to the surface of the filter element, which helps to obtain more realistic filtration effect data and ensure the effectiveness and accuracy of the final filter element test. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The overall structure of a filter element integrity test device proposed by the present invention is shown in FIG. Figure 1 ;

[0022] Figure 2 The overall structure of a filter element integrity test device proposed by the present invention is shown in FIG. Figure 2 ;

[0023] Figure 3 A partial cross-sectional view of a filter element integrity test device proposed by the present invention Figure 1 ;

[0024] Figure 4 A filter element integrity testing device proposed by the present invention Figure 3 Schematic diagram of the enlarged structure of area A in the middle;

[0025] Figure 5 A partial cross-sectional view of a filter element integrity test device proposed by the present invention Figure 2 ;

[0026] Figure 6 A partial cross-sectional view of a filter element integrity test device proposed by the present invention Figure 3 ;

[0027] Figure 7 A filter element integrity testing device proposed by the present invention Figure 6 Schematic diagram of the enlarged structure of the middle B area;

[0028] Figure 8 A filter element integrity testing device proposed by the present invention Figure 6Schematic diagram of the enlarged structure of the middle C area.

[0029] Figure: 1, test water tank; 2, video microscope; 3, lifting sleeve; 31, electric push rod; 32, clamping rod; 321, pressure relief channel; 322, positioning slide; 33, positioning ring; 331, pressure relief pipe; 34, test seat; 341, guide groove; 4, drive shaft; 41, drive wheel; 42, driven wheel; 43, drive motor; 431, pulley assembly; 5, piston box; 51, piston plate; 52, push-pull plate; 521, push-pull Rod; 53, hinged seat; 54, push flow pipe; 55, air supply pipe; 551, hopper; 56, liquid guide pipe; 561, filter box; 562, filter plate; 6, movable seat; 61, reciprocating screw; 62, jet head; 63, jet groove; 7, piston cylinder; 71, pressure plate; 72, return spring; 73, extrusion rod; 74, pressure accumulator box; 741, injection pipe; 75, push liquid pipe; 76, liquid supply pipe; 761, liquid extraction pipe; 8, discharge pipe. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0032] Example:

[0033] Reference Figures 1-8, a filter element integrity testing device includes a test water tank 1 and a video microscope 2 fixed on the top of its side wall. The test water tank 1 is filled with ultrapure water and also includes a lifting sleeve 3. The top of the side wall of the test water tank 1 is fixedly connected to an electric push rod 31. The lifting sleeve 3 is fixed to the bottom of the telescopic end of the electric push rod 31. The lifting sleeve 3 is slidably connected to a clamping rod 32 on both sides of the lifting sleeve 3. The other ends of the two sets of clamping rods 32 are fixedly connected to a positioning ring 33. A test seat 34 is rotatably connected in the positioning ring 33, and a driving part for driving the test seat 34 to rotate is provided on the test water tank 1; a guide groove 341 is opened in one side of the test seat 34, and the guide groove 341 is connected to the inner cavity of the positioning ring 33 on the same side, and a guide part for conveying fluid into the guide groove 341 is provided on the test water tank 1; a jet component is arranged in the test water tank 1, and the jet component is used to spray a columnar water flow to the filter element fixed between the two sets of test seats 34.

[0034] Reference Figures 1-6 The driving part includes a driving shaft 4, which is rotatably connected to the inner wall of the test water tank 1. Both sides of the driving shaft 4 are fixedly connected to a driving wheel 41, and the end of the test seat 34 is fixedly connected to a driven wheel 42. The driving wheel 41 is aligned with the driven wheel 42 up and down. The bottom of the test water tank 1 is fixedly connected to a driving motor 43, and the output shaft of the driving motor 43 is connected to the outer end of the driving shaft 4 through a pulley group 431 for transmission; a pressure reducing channel 321 is opened in the clamping rod 32 near the side of the driving motor 43, and the two ends of the pressure reducing channel 321 are respectively connected to the lifting sleeve 3 and the inner cavity of the positioning ring 33 connected thereto, and the top of the positioning ring 33 is fixed and connected to a pressure relief pipe 331. The side walls of the clamping rods 32 on both sides are fixedly connected to positioning sliders 322, which slide in contact with the inner wall of the test water tank 1, and the positioning slider 322 is used to position the clamping rod 32 so that it can only be lifted vertically.

[0035] Through the arrangement of the above structure, the electric push rod 31 first retracts upward, driving the lifting sleeve 3 and the clamping rod 32 to move upward, so that the two groups of test seats 34 are out of the water surface, and then the filter element to be tested is placed between the two groups of test seats 34, and then the electric push rod 31 extends downward, so that the two groups of test seats 34 are immersed in the ultrapure water body, thereby soaking the entire filter element. When the lifting sleeve 3 enters the liquid, under the action of water pressure, the clamping rods 32 on both sides will move toward the inside of the lifting sleeve 3, and the gas in the lifting sleeve 3 will be squeezed out along the decompression channel 321, the positioning ring 33 and the pressure relief pipe 331, so that the two groups of test seats 34 can clamp and fix the filter element by themselves, and finally the driven wheel 42 will fit tightly with the driving wheel 41, thereby squeezing and positioning the clamping rods 32 on both sides, thereby ensuring the stability of the filter element during the test process.

[0036] In addition, it should be noted that the driven wheel 42 will be on the same plane as the driving wheel 41, the width of the driving wheel 41 is greater than that of the driven wheel 42, and the distance between the driven wheel 42 and the inner wall of the test water tank 1 is less than the width of the driving wheel 41; when the test seat 34 is in a clamping state, the driven wheel 42 will be aligned and fit with the driving wheel 41, and when the test seat 34 exceeds the liquid surface and releases the clamping state, the driven wheel 42 will move toward the inner wall side of the test water tank 1, so that the driven wheel 42 and the driving wheel 41 are in a partially misaligned state.

[0037] Reference Figure 1-Figure 5 The guide part includes a piston box 5, which is on the outer wall of the test water tank 1, and a piston plate 51 is slidably connected to the piston box 5. The other outer end of the drive shaft 4 is fixedly connected to a push-pull disk 52, and the side wall of the push-pull disk 52 is rotatably connected to a push-pull rod 521. The top of the piston plate 51 is fixedly connected to a hinge seat 53, and the other end of the push-pull rod 521 is rotatably connected to the hinge seat 53. The lower part of the side wall of the piston box 5 is fixed and connected to a flow-pushing pipe 54, and the other end of the flow-pushing pipe 54 is connected to the inner cavity of the positioning ring 33 near the piston box 5; an air supply pipe 55 is fixed and connected to the side wall of the piston box 5, and the top of the air supply pipe 55 is fixedly connected to a hopper 551, and both the air supply pipe 55 and the flow-pushing pipe 54 are provided with a one-way valve. In addition, an electromagnetic valve is provided on the air supply pipe 55, and the position of the electromagnetic valve is located between the one-way valve of the air supply pipe 55 and the pipeline connected to the outside world.

[0038] It should be noted that the one-way valve in the air supply pipe 55 can only allow the external air flow to be supplied to the piston box 5; the one-way valve in the flow-pushing pipe 54 can only allow the fluid in the piston box 5 to enter the guide groove 341.

[0039] Through the arrangement of the above structure, the driving motor 43 is turned on, and the driving shaft 4 is driven to rotate through the transmission action of the pulley group 431, and the friction between the driven wheel 42 and the driving wheel 41 is used to drive the two groups of test seats 34 to rotate around the positioning rings 33 on both sides at the same time, thereby driving the filter element as a whole to rotate in the liquid, so that the filter element is fully infiltrated, and the liquid can fully fill the filter element membrane pores, which helps to evenly stress the membrane pores and form a continuous liquid phase, thereby ensuring that the gas must overcome surface tension to penetrate the membrane pores, ensuring the accuracy of the filter element integrity test, and being able to disturb the ultrapure water to simulate a more realistic filter element usage scenario, thereby improving the test effect; at the same time, the driving shaft 4 will rotate with the push-pull disk 52, and cooperate with the push-pull The setting of the rod 521 allows the piston plate 51 to slide back and forth in the piston box 5. When the piston plate 51 slides downward, the gas in the piston box 5 will be compressed and the one-way valve in the flow-pushing tube 54 will be opened, so that the compressed gas enters the guide groove 341 along the flow-pushing tube 54 and the positioning ring 33. When the piston plate 51 slides upward, a negative pressure suction effect will be generated in the piston box 5. At this time, the one-way valve in the air supply pipe 55 will be opened, so that the external air flow will be replenished into the piston box 5. This reciprocating process can continuously fill the filter element with gas. At this time, the video microscope 2 is used to perform real-time detection of the low-pressure area on the top of the filter element, and the bubble distribution on its surface is observed to evaluate the integrity and filtration accuracy of the filter element, thereby improving the test effect.

[0040] Among them, the abnormal bubble distribution is explained as follows: if there are tiny cracks or holes in the filter element, the gas will preferentially pass through these defective locations to form bubbles, rather than being evenly distributed on the membrane surface; if the bubbles on the filter element surface do not appear evenly on the entire surface, but are concentrated in certain areas, this may mean that the pore size in these areas is larger than other parts.

[0041] Reference Figure 2 、 Figure 6 and Figure 8 , wherein, a liquid guide tube 56 is fixed and connected between the test water tank 1 and the bottom of the inner cavity of the piston box 5, and a filter box 561 is fixed and connected to the liquid guide tube 56. The inner cavity of the filter box 561 is located on one side of the output end of the liquid guide tube 56 and is fixedly connected to a filter plate 562. The filter plate 562 can filter the liquid that will continuously circulate from the test water tank 1 to the piston box 5 to prevent the leaked micro-particles from participating in the subsequent simulation test again, thereby ensuring the accuracy of the test results. A one-way valve is provided in the liquid guide tube 56, and a solenoid valve is provided at one end of the liquid guide tube 56 close to the piston box 5, and the one-way valve is located between the solenoid valve and the piston box 5. The lower part of the side wall of the filter box 561 is fixedly connected to a drain pipe 8, and a solenoid valve is provided on the drain pipe 8.

[0042] It should be noted that the one-way valve in the liquid conduit 56 can only allow the liquid in the filter box 561 to enter the piston box 5.

[0043] Through the arrangement of the above structure, after the integrity and filtration accuracy evaluation of the filter element is completed, micro-particles with a particle size larger than the filtration standard of the filter element membrane pore are put into the hopper 551, and after they enter the piston box 5, the solenoid valve on the air supply pipe 55 is closed, and the solenoid valve in the liquid guide tube 56 is opened. In this way, under the reciprocating sliding action of the piston plate 51, the ultrapure water in the test water tank 1 will enter the piston box 5 and be sent into the filter element after being mixed with the micro-particles, thereby simulating the dynamic flow environment of the water body inside the filter element, which is more in line with its actual application environment. In this way, the filtering effect of the filter element can be evaluated more realistically, and the accuracy of the filter element test results is improved. At the same time, the video microscope 2 is used to detect the penetration of microparticles in the low-pressure area on the top of the filter element in real time. When the simulation test is completed, the solenoid valve in the liquid guide tube 56 is closed, and the solenoid valve in the liquid discharge tube 8 is opened to release all the ultrapure water in the test water tank 1, and filter out the microparticles mixed in it, and then calculate the ratio with the initially injected microparticles to obtain the filtering performance of the filter element and realize a comprehensive evaluation of the filtering effect of the filter element.

[0044] Reference Figure 2-Figure 8 , wherein the jet assembly includes a movable seat 6, the middle section of the drive shaft 4 is fixedly connected to a reciprocating screw 61, the movable seat 6 is threadedly sleeved on the reciprocating screw 61, and the bottom of the movable seat 6 fits the inner bottom of the test water tank 1, and both sides of the movable seat 6 are fixedly connected with a jet head 62, a jet groove 63 is opened in the movable seat 6, the inner cavity of the jet head 62 is connected to the jet groove 63, and a pushing part that continuously delivers thrust to the jet groove 63 is provided on the piston box 5; the pushing part includes two groups of piston cylinders 7, and the two groups of piston cylinders 7 are respectively fixed on both sides of the bottom of the piston box 5, and a pressure plate 71 is slidably connected in the piston cylinder 7, and a return spring 72 is fixedly connected between the bottom of the pressure plate 71 and the inner bottom of the piston cylinder 7, and the top of the pressure plate 71 is fixedly connected to an extrusion The pressure rod 73 and the bottom of the test water tank 1 are fixedly connected to a pressure accumulator box 74, the side wall of the pressure accumulator box 74 is fixed and connected to an injection tube 741, the other end of the injection tube 741 is connected to the inner cavity of the jet groove 63, the bottoms of the two groups of piston cylinders 7 are fixed and connected to a liquid pushing tube 75, the other end of the liquid pushing tube 75 is connected to the inner cavity of the pressure accumulator box 74; the bottoms of the two groups of piston cylinders 7 are connected through a liquid infusion tube 76, and the liquid infusion tube 76 is fixed and connected to a liquid extraction tube 761, the other end of the liquid extraction tube 761 is connected to the inner cavity of the liquid guide tube 56, and the connection point is located between the solenoid valve and the filter box 561 provided on the liquid guide tube 56, a one-way valve is provided in the end of the liquid extraction tube 761 close to the liquid guide tube 56, and a one-way valve is provided in the end of the liquid pushing tube 75 close to the piston cylinder 7.

[0045] It should be noted that the one-way valve in the liquid extraction tube 761 can only allow the liquid in the liquid guide tube 56 to enter the piston cylinder 7, while the one-way valve in the liquid push tube 75 can only allow the liquid in the piston cylinder 7 to enter the jet groove 63.

[0046] When the piston plate 51 is pressed down again, the electromagnetic valve in the liquid pushing pipe 75 is opened, and the liquid flows into the liquid accumulator box 561 through the liquid pushing pipe 75, and the liquid flows into the liquid accumulator box 561 through the liquid pushing pipe 75. The water flows into the jet groove 63 and is finally ejected toward the outer wall of the filter element by the jet head 62. When the drive shaft 4 rotates, the reciprocating screw 61 will also rotate synchronously. At this time, the movable seat 6 will continuously slide back and forth along the reciprocating screw 61, so that the two sets of jet heads 62 can exert a comprehensive water column spraying effect on the filter element, thereby simulating the different flow and pressure conditions encountered when the filter element is used. These dynamic conditions more accurately reflect the performance of the filter element in actual use, and at the same time can remove the micro-particles attached to the surface of the filter element, which is helpful to obtain more realistic filtering effect data and ensure the effectiveness and accuracy of the final test of the filter element.

[0047] In addition, in order to facilitate the understanding of the calculation method of the filter element's filtration performance, the following explanation is given: Assuming that the initial injection amount is 10, and the amount leaked into the ultrapure water and finally filtered is 2, then it can be known that the residual amount in the filter element is 8. In this way, the filtration performance of the filter element can be calculated to be 80% (that is, it can retain 80% of the particulate matter), and the leakage of the filter element can also be obtained as 20%.

[0048] Reference Figures 1-8 After the filter element 31 is in the liquid state, the filter element 31 is immersed in the ultrapure water and the filter element 31 is immersed in the ultrapure water. When the filter element 31 is in the liquid state, the filter element 31 is immersed in the ultrapure water and the filter element 31 is immersed in the ultrapure water. When the filter element 31 is in the liquid state, the filter element 31 is immersed in the ultrapure water and the filter element 31 is immersed in the ultrapure water. When the filter element 31 is in the liquid state, the filter element 31 is immersed in the ultrapure water and the filter element 31 is immersed in the ultrapure water. When the filter element 31 is in the liquid state, the filter element 31 is immersed in the ultrapure water and the filter element 31 is immersed in the ultrapure water. When the filter element 31 is in the liquid state, the filter element 31 is immersed in the ultrapure water and the filter element 31 is immersed in the ultrapure water

[0049] Next, the drive motor 43 is turned on, and the drive shaft 4 is driven to rotate through the transmission action of the pulley group 431, and the friction between the driven wheel 42 and the driving wheel 41 is used to drive the two groups of test seats 34 to rotate around the positioning rings 33 on both sides at the same time, thereby driving the filter element as a whole to rotate in the liquid, so that the filter element is fully infiltrated, so that the liquid can fully fill the filter element membrane pores, which helps to evenly bear the force on the membrane pores and form a continuous liquid phase, thereby ensuring that the gas must overcome the surface tension to penetrate the membrane pores, ensuring the accuracy of the filter element integrity test, and being able to disturb the ultrapure water to simulate a more realistic filter element usage scenario, thereby improving the test effect; at the same time, the drive shaft 4 will rotate with the push-pull disk 52, and cooperate with the push-pull rod 52 1 is set so that the piston plate 51 slides back and forth in the piston box 5. When the piston plate 51 slides downward, the gas in the piston box 5 is compressed and the one-way valve in the flow-pushing tube 54 is opened, so that the compressed gas enters the guide groove 341 along the flow-pushing tube 54 and the positioning ring 33. When the piston plate 51 slides upward, a negative pressure suction effect is generated in the piston box 5. At this time, the one-way valve in the air supply pipe 55 is opened, so that the external air flow is replenished into the piston box 5. This reciprocating process can continuously fill the filter element with gas. At this time, the video microscope 2 is used to perform real-time detection on the low-pressure area on the top of the filter element and observe the bubble distribution on its surface, so as to evaluate the integrity and filtration accuracy of the filter element and improve the test effect.

[0050] Then, after the above evaluation is completed, microparticles with a particle size larger than the filtration standard of the filter element membrane pores are added to the hopper 551. After the microparticles enter the piston box 5, the solenoid valve on the air supply pipe 55 is closed, and the solenoid valve in the liquid guide pipe 56 is opened. In this way, under the reciprocating sliding action of the piston plate 51, the ultrapure water in the test water tank 1 will enter the piston box 5 and be sent into the filter element after mixing with the microparticles. This simulates the dynamic flow environment of the water body inside the filter element, which is more in line with its actual application environment, so as to more realistically evaluate the filtration effect of the filter element and improve the accuracy of the filter element test results. At the same time, the video microscope 2 is used to monitor the penetration of microparticles in the low-pressure area at the top of the filter element in real time. When the simulation test is completed, the solenoid valve in the liquid guide pipe 56 is closed, and the solenoid valve in the discharge pipe 8 is opened to release all the ultrapure water in the test water tank 1 and filter out the microparticles mixed therein. The ratio is then calculated with the initially added microparticles to obtain the filtration performance of the filter element, thereby achieving a comprehensive evaluation of the filtration effect of the filter element.

[0051] In addition, when the piston plate 51 moves downward, it will contact the top of the extrusion rod 73 and push the extrusion rod 73 and the pressure plate 71 to slide downward, thereby compressing the inside of the piston cylinder 7. When the piston plate 51 is reset, the return spring 72 rebounds and generates suction in the piston cylinder 7, thereby opening the one-way valve in the liquid extraction pipe 761, so that the liquid in the filter box 561 is sucked into the piston cylinder 7. When the pressure plate 71 is pressed down again, the solenoid valve in the liquid pushing pipe 75 is opened, so that the liquid flows into the jet along the liquid pushing pipe 75, the pressure accumulator box 74 and the injection pipe 741. The water in the groove 63 is finally sprayed toward the outer wall of the filter element by the jet head 62. When the drive shaft 4 rotates, the reciprocating screw 61 will also rotate synchronously. At this time, the movable seat 6 will continuously slide back and forth along the reciprocating screw 61, so that the two sets of jet heads 62 can exert a comprehensive water column spraying effect on the filter element, thereby simulating the different flow and pressure conditions encountered when the filter element is used. These dynamic conditions more accurately reflect the performance of the filter element in actual use, and at the same time can remove the micro-particles attached to the surface of the filter element, which helps to obtain more realistic filtration effect data and ensure the effectiveness and accuracy of the final test of the filter element.

[0052] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A filter element integrity testing device, comprising a test water tank and a video microscope fixed on the top of the side wall thereof, characterized in that: Also includes: The lifting sleeve is fixedly connected to the top of the side wall of the test water tank with an electric push rod, and the lifting sleeve is fixed to the bottom of the telescopic end of the electric push rod. Wherein, both sides of the lifting sleeve are slidably connected to clamping rods, the other ends of the two groups of clamping rods are fixedly connected to positioning rings, the positioning rings are rotatably connected to the test seat, and the test water tank is provided with a driving part for driving the test seat to rotate; A guide groove is provided in the test seat on one side, the guide groove is connected to the inner cavity of the positioning ring on the same side, and a guide part for conveying fluid into the guide groove is provided on the test water tank; A jet assembly is disposed in the test water tank and is used to spray a columnar water flow toward the filter element fixed between the two sets of test seats; The driving portion includes a driving shaft, which is rotatably connected to the inner wall of the test water tank. Both sides of the driving shaft are fixedly connected to driving wheels. The end of the test seat is fixedly connected to a driven wheel. The driving wheel and the driven wheel are aligned up and down. The bottom of the test water tank is fixedly connected to a driving motor. The output shaft of the driving motor is connected to the outer end of the driving shaft through a pulley set. The guide part includes a piston box, which is on the outer wall of the test water tank. A piston plate is slidably connected to the piston box. The other outer end of the drive shaft is fixedly connected to a push-pull disk. A push-pull rod is rotatably connected to the side wall of the push-pull disk through a pin. The top of the piston plate is fixedly connected to a hinge seat. The other end of the push-pull rod is rotatably connected to the hinge seat. The lower part of the side wall of the piston box is fixed and connected to a flow-pushing tube. The other end of the flow-pushing tube is connected to the inner cavity of the positioning ring near the piston box; An air supply pipe is fixed on the side wall of the piston box and is in communication with the piston box. The top of the air supply pipe is fixedly connected to a hopper, and a one-way valve is provided in both the air supply pipe and the flow-pushing pipe. The jet assembly includes a movable seat, a reciprocating screw is fixedly connected to the middle section of the drive shaft, the movable seat is threadedly sleeved on the reciprocating screw, and the bottom of the movable seat is in contact with the inner bottom of the test water tank, and jet heads are fixedly connected to both sides of the movable seat, a jet groove is provided in the movable seat, the inner cavity of the jet head is connected to the jet groove, and a flow-pushing part that continuously delivers thrust to the jet groove is provided on the piston box; The flow pushing part includes two groups of piston cylinders, the two groups of piston cylinders are respectively fixed on both sides of the bottom of the piston box, a pressure plate is slidably connected in the piston cylinder, a return spring is fixedly connected between the bottom of the pressure plate and the bottom of the piston cylinder, the top of the pressure plate is fixedly connected to the extrusion rod, the bottom of the test water tank is fixedly connected to the pressure accumulation box, the side wall of the pressure accumulation box is fixed and connected with an injection pipe, the other end of the injection pipe is connected with the inner cavity of the jet groove, the bottoms of the two groups of piston cylinders are fixed and connected with a liquid pushing pipe, the other end of the liquid pushing pipe is connected with the inner cavity of the pressure accumulation box; The bottoms of the two groups of piston cylinders are connected by a fluid infusion tube, and a fluid extraction tube is fixed on the fluid infusion tube and connected to the fluid extraction tube. The other end of the fluid extraction tube is connected to the inner cavity of the fluid guide tube, and the connection point is located between the solenoid valve and the filter box provided on the fluid guide tube. A one-way valve is provided in the end of the fluid extraction tube close to the fluid guide tube, and a one-way valve is provided in the end of the fluid push tube close to the piston cylinder.

2. A filter element integrity testing device according to claim 1, characterized in that: A liquid guide tube is fixed and connected between the test water tank and the bottom of the inner cavity of the piston box. A filter box is fixed on the liquid guide tube and connected. A filter plate is fixedly connected to one side of the inner cavity of the filter box located at the output end of the liquid guide tube, and a solenoid valve is provided at one end of the liquid guide tube close to the piston box.

3. A filter element integrity testing device according to claim 1, characterized in that: A pressure reducing channel is provided in the clamping rod near the driving motor side, and the two ends of the pressure reducing channel are respectively connected to the lifting sleeve and the inner cavity of the positioning ring connected thereto. The top of the positioning ring is fixed and connected to a pressure relief pipe, and positioning sliders are fixedly connected to the side walls of the clamping rods on both sides, and the positioning sliders slide in contact with the inner wall of the test water tank.

4. A filter element integrity testing device according to claim 2, characterized in that: A drain pipe is fixedly connected to the lower part of the side wall of the filter box, and a solenoid valve is provided on the drain pipe.

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