A microfiltration membrane dust test system

Abstract

The utility model relates to a microfiltration membrane dust test system relates to microfiltration membrane dust test equipment technical field, the utility model discloses a test bench, two test bench plates are installed to the inner wall of test bench, test mechanism, test bench one side is equipped with test mechanism and auxiliary mechanism, and test mechanism one side is installed with auxiliary mechanism, wherein, test mechanism includes three assembly frames, and three assembly frames all are fixedly connected with test bench one side. The utility model provides a kind of microfiltration membrane dust test system with in dust tank adding dust of specific concentration and particle size distribution, after stirring evenly, it is sent into test pipeline, under the action of pressure, dust-containing airflow passes through filter membrane fixed on filter membrane, dust is intercepted, gas permeates filter membrane, pressure sensor monitors the pressure change before and after filter membrane, and flow control system ensures that gas flow is stable, data acquisition unit analyzes pressure, flow and other data, obtains the performance parameter advantages such as filtration efficiency, pressure drop, air permeability of filter membrane.

Description

Technical Field

[0001] This application relates to the technical field of microfiltration membrane dust testing equipment, and in particular to a microfiltration membrane dust testing system. Background Technology

[0002] Microfiltration membrane dust testing equipment is a device used to test the performance of microfiltration membranes in the process of filtering dust. It is commonly used in fields such as nuclear power plants and air purification. Its basic principle is to simulate dust pollution in the actual environment and evaluate the filtration effect of the membrane.

[0003] Utility model CN216646186U discloses a testing device for dust content in down products. Its key technical features include a testing device, a storage tank, and two limiting slots. The storage tank is located on the right side of the testing device, and the two limiting slots are located on the front and rear sides of the inner wall of the storage tank, respectively. L-shaped hooks are fitted inside the two limiting slots, with a placement slot at the top of each L-shaped hook. A positioning mechanism is installed inside the placement slot, and positioning slots are located on both the left and right sides of the top of the inner wall of the storage tank. This utility model, by incorporating L-shaped hooks, allows for easy attachment to the user's body or belt, facilitating carrying and solving the problem of inconvenience in carrying existing devices. Therefore, this testing device for dust content in down products offers the advantage of easy portability.

[0004] Regarding the aforementioned issues, the following technical deficiencies exist: Nuclear power plant filter membranes play a crucial role in the safe and stable operation of nuclear power plants, primarily in the following aspects: First, environmental cleanliness requirements: The internal systems of nuclear power plants require an extremely clean environment. Any minute impurities may affect equipment operation or cause safety accidents. Nuclear power plant filter membranes can effectively filter impurities in the air and circulating media, maintaining environmental cleanliness. Second, radiation protection requirements: Nuclear power plants generate radioactive materials during operation. Nuclear power plant filter membranes can trap radioactive particles and aerosols, preventing leakage and ensuring the safety of personnel and the environment. However, existing testing systems are complex to operate and ineffective.

[0005] Therefore, it is necessary to provide a new replacement for the microfiltration membrane dust testing system to solve the above-mentioned technical problems. Utility Model Content

[0006] One technical problem this application aims to solve is that nuclear power plant filter membranes play a crucial role in the safe and stable operation of nuclear power plants, mainly in the following aspects: First, environmental cleanliness requirements: The internal systems of nuclear power plants require an extremely clean environment. Any minute impurities may affect equipment operation or cause safety accidents. Nuclear power plant filter membranes can effectively filter impurities in the air and circulating media, maintaining environmental cleanliness. Second, radiation protection requirements: Nuclear power plants generate radioactive materials during operation. Nuclear power plant filter membranes can trap radioactive particles and aerosols, preventing leakage and ensuring the safety of personnel and the environment. However, existing testing systems are complex to operate and ineffective.

[0007] To address the aforementioned technical problems, this application provides a microfiltration membrane dust testing system, comprising a test bench with two test plates mounted on its inner wall; a testing mechanism with an auxiliary mechanism on one side of the test bench, and an auxiliary mechanism mounted on the other side of the testing mechanism; wherein the testing mechanism includes three assembly frames, each fixedly connected to one side of the test bench, with a common dust canister fixedly connected to the side of the three assembly frames closest to each other, a main circuit fixedly connected to one side of the dust canister, a back pressure valve fixedly connected to one end of the arc surface of the main circuit, a first pressure gauge fixedly connected to one end of the arc surface of the back pressure valve, a test pipeline fixedly connected to one end of the arc surface of the main circuit, a flow meter fixedly connected to one end of the arc surface of the test pipeline, and a second ball valve fixedly connected to the arc surface of the test pipeline. A second pressure gauge is fixedly connected to the side of the dust tank away from the test pipeline. A third ball valve is fixedly connected to one end of the arc surface of the second pressure gauge. A filter membrane is fixedly connected to one end of the arc surface of the third ball valve. A sampling measuring cup is fixedly connected to the output end of the filter membrane. The sampling measuring cup is fixedly connected to one of the test bench plates. A drain valve is fixedly connected to the side of the dust tank away from the main circuit. A drain pipeline is fixedly connected to one end of the arc surface of the drain valve. A multi-stage centrifugal pump is fixedly connected to the other end of the arc surface of the drain pipeline. One side of the multi-stage centrifugal pump is fixedly connected to the main circuit. The main circuit is fixedly connected to the inner wall of the two test bench plates. The auxiliary mechanism includes a support plate. The support plate is fixedly connected to the arc surface of the dust tank. A connecting groove is opened on the side of the support plate. A slider is slidably connected to the inner wall of the connecting groove. A limit block is fixedly connected to one side of the slider.

[0008] In some embodiments, the testing mechanism further includes a first ball valve, which is fixedly connected to one side of the dust tank. A pure water pipeline is fixedly connected to the side of the first ball valve away from the dust tank. The same fixed rod is fixedly connected to both sides of the inner wall of the dust tank. A connecting block is rotatably connected to the arc surface of the fixed rod. A cover plate is fixedly connected to one side of the connecting block. A handle is fixedly connected to the side of the cover plate away from the dust tank.

[0009] In some embodiments, an anti-slip sleeve is fixedly connected to the surface of the handle, and the surface of the anti-slip sleeve has a plurality of anti-slip patterns.

[0010] In some embodiments, both ends of the arc surface of the fixing rod are slidably connected to a first coil spring, and the two ends of the first coil spring are fixedly connected to the connecting block and the inner wall of the dust can, respectively.

[0011] In some embodiments, a sealing gasket is fixedly connected to the side of the cover plate near the dust can, and the cross-sectional dimensions of the sealing gasket are the same as those of the cover plate.

[0012] In some embodiments, the fixing rod is a steel rod.

[0013] In some embodiments, the auxiliary mechanism further includes a connecting rod, which is fixedly connected to one side of the slider. A positioning rod slides through the inner wall of the connecting rod. A spring is fitted on one end of the arc surface of the positioning rod. The two ends of the spring are fixedly connected to the positioning rod and the connecting rod, respectively. A protrusion is fixedly connected to the other end of the arc surface of the positioning rod. Two limiting holes are opened on the side of the support plate near the positioning rod. The positioning rod is slidably connected to the inner wall of one of the limiting holes.

[0014] In some embodiments, a contact pad is fixedly connected to one side of the limiting block, and the cross-section of the contact pad is rectangular.

[0015] In some embodiments, an auxiliary rod is fixedly passed through one side wall of the connecting groove, and the auxiliary rod slides through the inner wall of the slider.

[0016] In some embodiments, an adjusting block is fixedly connected to one end of the arc surface of the positioning rod, and the cross-section of the adjusting block is arc-shaped.

[0017] Through the above technical solution, the testing mechanism provided in this application adds dust with a specific concentration and particle size distribution to the dust tank, stirs it evenly, and then sends it into the test pipeline. Under pressure, the dust-laden airflow passes through the filter membrane fixed on the filter membrane, the dust is intercepted, the gas passes through the filter membrane, the pressure sensor monitors the pressure change before and after the filter membrane, the flow control system ensures the gas flow is stable, and the data acquisition unit analyzes data such as pressure and flow rate to obtain performance parameters such as the filtration efficiency, pressure drop, and air permeability of the filter membrane.

[0018] By setting up an auxiliary mechanism, when the cover plate comes into contact with the dust canister, the auxiliary mechanism can be used to squeeze the cover plate, thereby improving the stability of the contact between the cover plate and the dust canister. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a three-dimensional structural schematic diagram of the microfiltration membrane dust testing system disclosed in the embodiments of this application;

[0021] Figure 2 This is a schematic diagram of the test mechanism of the microfiltration membrane dust testing system disclosed in the embodiments of this application;

[0022] Figure 3 This is a partial structural schematic diagram of the testing mechanism of the microfiltration membrane dust testing system disclosed in the embodiments of this application;

[0023] Figure 4 This is a schematic diagram of the auxiliary mechanism of the microfiltration membrane dust testing system disclosed in the embodiments of this application;

[0024] Figure 5 This is a schematic diagram showing the disassembled structure of the auxiliary mechanism of the microfiltration membrane dust testing system disclosed in the embodiments of this application.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Test bench; 2. Testing mechanism; 201. Assembly frame; 202. Dust tank; 203. First ball valve; 204. Pure water pipeline; 205. Main circuit; 206. Back pressure valve; 207. First pressure gauge; 208. Test pipeline; 209. Second ball valve; 210. Flow meter; 211. Multistage centrifugal pump; 212. Drain valve; 213. Drain pipeline; 214. Connecting block; 215. Fixing rod; 216. First coil spring; 217. Handle; 218. 219. Cover plate; 220. Anti-slip sleeve; 221. Sealing gasket; 222. Second pressure gauge; 223. Third ball valve; 224. Filter membrane; 225. Sampling cup; 3. Auxiliary mechanism; 301. Support plate; 302. Connecting groove; 303. Slider; 304. Limiting block; 305. Connecting rod; 306. Positioning rod; 307. Spring; 308. Limiting hole; 309. Auxiliary rod; 310. Protrusion; 311. Contact pad; 312. Adjusting block; 4. Test bench plate. Detailed Implementation

[0027] The embodiments of this application will be further described in detail below with reference to the accompanying drawings and examples. The detailed description of the following embodiments and the accompanying drawings are used to illustrate the principles of this application by way of example, but should not be used to limit the scope of this application. This application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0028] These embodiments are provided to make the application thorough and complete, and to fully express the scope of the application to those skilled in the art. It should be noted that, unless otherwise specifically stated, the relative arrangement of components and steps, material composition, numerical expressions, and values ​​illustrated in these embodiments should be interpreted as merely exemplary and not as limiting.

[0029] It should be noted that, in the description of this application, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," and "outer," etc., indicating orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] Furthermore, the terms "first," "second," and similar terms used in this application do not indicate any order, quantity, or importance, but are merely used to distinguish different parts. "Vertical" is not strictly vertical, but within the permissible margin of error. "Parallel" is not strictly parallel, but within the permissible margin of error. Terms such as "including" or "contains" mean that the element preceding the word encompasses the element listed after it, and do not exclude the possibility of encompassing other elements as well.

[0031] It should also be noted that, in the description of this application, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application depending on the specific circumstances. When a specific device is described as being located between a first device and a second device, an intermediary device may or may not be present between the specific device and the first or second device.

[0032] All terms used in this application have the same meaning as understood by one of ordinary skill in the art to which this application pertains, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and not as idealized or highly formalized, unless expressly defined herein.

[0033] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0034] Reference Figure 1 As shown, this utility model provides a technical solution: a microfiltration membrane dust testing system, including a test bench 1, with two test plates 4 installed on the inner wall of the test bench 1; a testing mechanism 2, with a testing mechanism 2 and an auxiliary mechanism 3 provided on one side of the test bench 1, and the auxiliary mechanism 3 installed on one side of the testing mechanism 2.

[0035] The specific setup and function of testing mechanism 2 and auxiliary mechanism 3 will be explained below.

[0036] Reference Figure 2 and Figure 3As shown in this embodiment: the testing mechanism 2 includes three assembly frames 201, each fixedly connected to one side of the test bench 1. A dust canister 202 is fixedly connected to the side of each assembly frame 201 closest to the others. A main circuit 205 is fixedly connected to one side of the dust canister 202. A back pressure valve 206 is fixedly connected to one end of the arc surface of the main circuit 205. A first pressure gauge 207 is fixedly connected to one end of the arc surface of the back pressure valve 206. A test pipeline 208 is fixedly connected to one end of the arc surface of the main circuit 205. A flow meter 210 is fixedly connected to one end of the arc surface of the test pipeline 208. A second ball valve 209 is fixedly connected to the arc surface of the test pipeline 208. The flow meter 210 is fixedly connected to the side furthest from the test pipeline 208. A second pressure gauge 221 is fixedly connected to the test mechanism 2. A third ball valve 222 is fixedly connected to one end of the arc surface of the second pressure gauge 221. A filter membrane 223 is fixedly connected to one end of the arc surface of the third ball valve 222. A sampling measuring cup 224 is fixedly connected to the output end of the filter membrane 223. The sampling measuring cup 224 is fixedly connected to one of the test benches 4. A drain valve 212 is fixedly connected to the side of the dust tank 202 away from the main circuit 205. A drain pipe 213 is fixedly connected to one end of the arc surface of the drain valve 212. A multi-stage centrifugal pump 211 is fixedly connected to the other end of the arc surface of the drain pipe 213. One side of the multi-stage centrifugal pump 211 is fixedly connected to the main circuit 205. The main circuit 205 is fixedly connected to the inner walls of the two test benches 4. The test mechanism 2 also includes... The system includes a first ball valve 203, which is fixedly connected to one side of the dust canister 202. A pure water pipe 204 is fixedly connected to the side of the first ball valve 203 away from the dust canister 202. A fixed rod 215 is fixedly connected to both sides of the inner wall of the dust canister 202. A connecting block 214 is rotatably connected to the arc surface of the fixed rod 215. A cover plate 218 is fixedly connected to one side of the connecting block 214. A handle 217 is fixedly connected to the side of the cover plate 218 away from the dust canister 202. An anti-slip sleeve 219 is fixedly connected to the surface of the handle 217. The surface of the anti-slip sleeve 219 has several anti-slip patterns, which increases the friction of the handle 217 surface and increases the speed at which the cover plate 218 is opened via the handle 217. The fixed rod 21... Both ends of the arc surface of component 5 are slidably connected to a first coil spring 216. The two ends of the first coil spring 216 are fixedly connected to the connecting block 214 and the inner wall of the dust can 202, respectively. The first coil spring 216 can quickly drive the opened cover plate 218 to reset, which facilitates personnel to seal the dust can 202. A sealing gasket 220 is fixedly connected to the side of the cover plate 218 near the dust can 202. The cross-sectional dimensions of the sealing gasket 220 are the same as those of the cover plate 218. The sealing gasket 220 can improve the contact stability between the cover plate 218 and the dust can 202 and improve the sealing effect of the cover plate 218 on the dust can 202. The fixing rod 215 is a steel rod. The surface of the steel fixing rod 215 is less prone to deformation and has a better service life.

[0037] According to Figure 4 and Figure 5 As shown in this embodiment: the auxiliary mechanism 3 includes a support plate 301, which is fixedly connected to the arc surface of the dust tank 202. A connecting groove 302 is provided on the side of the support plate 301, and a slider 303 is slidably connected to the inner wall of the connecting groove 302. A limit block 304 is fixedly connected to one side of the slider 303. The auxiliary mechanism 3 also includes a connecting rod 305, which is fixedly connected to one side of the slider 303. A positioning rod 306 slides through the inner wall of the connecting rod 305. A spring 307 is sleeved on one end of the arc surface of the positioning rod 306. The two ends of the spring 307 are fixedly connected to the positioning rod 306 and the connecting rod 305, respectively. A protrusion 310 is fixedly connected to the other end of the arc surface of the positioning rod 306. The support plate 301 is close to the positioning rod 306. Two limiting holes 308 are provided on one side of the positioning rod 306. The positioning rod 306 is slidably connected to the inner wall of one of the limiting holes 308. A contact pad 311 is fixedly connected to one side of the limiting block 304. The contact pad 311 has a rectangular cross-section. The contact pad 311 can prevent the limiting block 304 from directly contacting the cover plate 218 and avoid wear. An auxiliary rod 309 is fixedly connected through one side wall of the connecting groove 302. The auxiliary rod 309 slides through the inner wall of the slider 303. The auxiliary rod 309 can improve the stability of the slider 303 sliding in the connecting groove 302. An adjusting block 312 is fixedly connected to one end of the arc surface of the positioning rod 306. The adjusting block 312 has an arc cross-section. The adjusting block 312 can increase the speed of pulling the positioning rod 306.

[0038] Working Principle: To address the shortcomings of traditional testing systems, such as complex operation, time-consuming and labor-intensive processes, and poor results, a certain weight of standard dust is weighed and added to a container filled with pure water, with continuous stirring. The stirred slurry is diluted to form a slurry solution, and its concentration is calculated. The slurry solution is then placed in the dust tank 202 and circulated and stirred in the main circuit 205 for a certain period of time until it is uniformly mixed before testing. After collecting the downstream liquid through the testing circuit, the particle count can be directly measured. Generally, three tests are conducted, and the average value is taken as the particle count of the liquid. After each test, the instrument must be rinsed with pure water to avoid errors. After the test, the instrument is rinsed with pure water until the specified particle count is reached. After rinsing, the instrument is rinsed with anhydrous ethanol to prevent bacterial growth from the moisture inside the instrument. The system pipeline is rinsed at least twice. The filtration accuracy and filtration efficiency of the membrane under test are calculated based on the particle count.

[0039] When it is necessary to improve the stability of the contact between the cover plate 218 and the dust can 202, pull the positioning rod 306. The movement of the positioning rod 306 will cause the spring 307 to stretch. At this time, the positioning rod 306 can be pulled out from one of the limiting holes 308. Then, the positioning rod 306 can drive the connecting rod 305 to move. The movement of the connecting rod 305 will cause the slider 303 to slide in the connecting groove 302. At this time, the limiting block 304 can be driven to contact the upper end of the cover plate 218. Continue to move the limiting block 304 until the positioning rod 306 moves to one side of the other limiting hole 308. At this time, the positioning rod 306 can be released. The positioning rod 306 can then connect with the inner wall of the other limiting hole 308 under the action of the spring 307. At this time, the position of the limiting block 304 can be fixed, thereby limiting the opening angle of the cover plate 218 and improving the stability of the contact between the cover plate 218 and the dust can 202.

[0040] The embodiments of this application have now been described in detail. To avoid obscuring the concept of this application, some details known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed herein based on the above description.

[0041] While specific embodiments of this application have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of this application. Those skilled in the art should understand that modifications can be made to the above embodiments or equivalent substitutions can be made to some technical features without departing from the scope and spirit of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any manner.

Claims

1. A microfiltration membrane dust testing system, characterized in that, include: Test bench (1), the inner wall of which is fitted with two test bench plates (4); The test mechanism (2) is provided on one side of the test bench (1). Auxiliary mechanism (3) is installed on one side of the test mechanism (2); The testing mechanism (2) includes three assembly frames (201), each of which is fixedly connected to one side of the test bench (1). A dust canister (202) is fixedly connected to the side of each assembly frame (201) closest to the others. A main circuit (205) is fixedly connected to one side of the dust canister (202). A back pressure valve (206) is fixedly connected to one end of the arc surface of the main circuit (205). A first pressure gauge (207) is fixedly connected to one end of the arc surface of the back pressure valve (206). One end of the arc surface of the main circuit (205) is fixedly connected to a test pipeline (208), one end of the arc surface of the test pipeline (208) is fixedly connected to a flow meter (210), the arc surface of the test pipeline (208) is fixedly connected to a second ball valve (209), the side of the flow meter (210) away from the test pipeline (208) is fixedly connected to a second pressure gauge (221), one end of the arc surface of the second pressure gauge (221) is fixedly connected to a third ball valve (222), the arc surface of the third ball valve (222) is... One end of the filter membrane (223) is fixedly connected to a filter membrane (223), and the output end of the filter membrane (223) is fixedly connected to a sampling measuring cup (224). The sampling measuring cup (224) is fixedly connected to one of the test benches (4). The dust tank (202) is fixedly connected to a drain valve (212) on the side away from the main circuit (205). One end of the arc surface of the drain valve (212) is fixedly connected to a drain pipe (213), and the other end of the arc surface of the drain pipe (213) is fixedly connected to a multi-stage centrifugal pump (211). One side of the centrifugal pump (211) is fixedly connected to the main circuit (205). The main circuit (205) is fixedly connected to the inner wall of the two test benches (4). The auxiliary mechanism (3) includes a support plate (301). The support plate (301) is fixedly connected to the arc surface of the dust tank (202). A connecting groove (302) is provided on the side of the support plate (301). A slider (303) is slidably connected to the inner wall of the connecting groove (302). A limit block (304) is fixedly connected to one side of the slider (303).

2. The microfiltration membrane dust testing system according to claim 1, characterized in that, The testing mechanism (2) also includes a first ball valve (203), which is fixedly connected to one side of the dust tank (202). The side of the first ball valve (203) away from the dust tank (202) is fixedly connected to a pure water pipeline (204). The same fixing rod (215) is fixedly connected to both sides of the inner wall of the dust tank (202). The arc surface of the fixing rod (215) is rotatably connected to a connecting block (214). A cover plate (218) is fixedly connected to one side of the connecting block (214). A handle (217) is fixedly connected to the side of the cover plate (218) away from the dust tank (202).

3. The microfiltration membrane dust testing system according to claim 2, characterized in that, The surface of the handle (217) is fixedly connected to an anti-slip sleeve (219), and the surface of the anti-slip sleeve (219) is provided with a number of anti-slip patterns.

4. The microfiltration membrane dust testing system according to claim 2, characterized in that, The two ends of the arc surface of the fixed rod (215) are slidably connected to the first coil spring (216), and the two ends of the first coil spring (216) are fixedly connected to the connecting block (214) and the inner wall of the dust can (202) respectively.

5. The microfiltration membrane dust testing system according to claim 2, characterized in that, A sealing gasket (220) is fixedly connected to the side of the cover plate (218) near the dust can (202), and the cross-sectional dimensions of the sealing gasket (220) are the same as those of the cover plate (218).

6. The microfiltration membrane dust testing system according to claim 2, characterized in that, The fixing rod (215) is a steel rod.

7. The microfiltration membrane dust testing system according to claim 1, characterized in that, The auxiliary mechanism (3) also includes a connecting rod (305), which is fixedly connected to one side of the slider (303). A positioning rod (306) slides through the inner wall of the connecting rod (305). A spring (307) is sleeved on one end of the arc surface of the positioning rod (306). The two ends of the spring (307) are fixedly connected to the positioning rod (306) and the connecting rod (305) respectively. A protrusion (310) is fixedly connected to the other end of the arc surface of the positioning rod (306). Two limiting holes (308) are opened on the side of the support plate (301) near the positioning rod (306). The positioning rod (306) is slidably connected to the inner wall of one of the limiting holes (308).

8. The microfiltration membrane dust testing system according to claim 1, characterized in that, A contact pad (311) is fixedly connected to one side of the limiting block (304), and the cross-section of the contact pad (311) is rectangular.

9. The microfiltration membrane dust testing system according to claim 7, characterized in that, An auxiliary rod (309) is fixedly inserted through one of the side walls of the connecting groove (302), and the auxiliary rod (309) slides through the inner wall of the slider (303).

10. The microfiltration membrane dust testing system according to claim 7, characterized in that, An adjusting block (312) is fixedly connected to one end of the arc surface of the positioning rod (306), and the cross section of the adjusting block (312) is arc-shaped.

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