A hollow fiber membrane bubble point testing device

Abstract

The utility model discloses a hollow fiber membrane bubble point testing device, including bottom box, be provided with test groove on the upper end surface of bottom box, be provided with the inside setting of test groove and place mechanism, place mechanism includes elevating platform, sleeve no.

Description

Technical Field

[0001] This utility model relates to the field of testing device technology, specifically a hollow fiber membrane bubble point testing device. Background Technology

[0002] Hollow fiber membrane bubble point testing is a method used to detect the pore size and distribution of hollow fiber membranes. Its working principle is based on the capillary phenomenon of liquid in membrane pores. By measuring the minimum pressure required for the membrane to be permeated by gas, i.e. bubble point pressure, the pore size of the membrane can be indirectly estimated. It has wide applications in membrane separation technology, water treatment, biomedicine and other fields.

[0003] For example, patent CN216726679U (A Hollow Fiber Membrane Bubble Point Pressure Testing Device and System) includes: an imaging unit, an identification unit, and a statistical unit; the imaging unit is used to photograph the hollow fiber membrane assembly and its adjacent area, which are contained in a test liquid and connected to a gas supply unit; the identification unit is communicatively connected to both the imaging unit and the statistical unit, and is used to identify whether the image captured by the imaging unit contains bubbles; when the identification unit detects bubbles in the image, it issues a trigger signal; when the statistical unit receives the trigger signal, it acquires the gas pressure data provided by the gas supply unit to the hollow fiber membrane assembly;

[0004] While the aforementioned existing technologies enable fast testing, they lack an auxiliary fixing structure for hollow fiber membranes. Consequently, during hollow fiber membrane bubble point testing, the membrane fibers are prone to shaking or displacement due to airflow impact, affecting testing accuracy. Therefore, there is an urgent market need to develop a hollow fiber membrane bubble point testing device to help solve the existing problems. Utility Model Content

[0005] The purpose of this invention is to provide a hollow fiber membrane bubble point testing device to solve the problem mentioned in the background art that the membrane fiber is easily shaken or displaced due to airflow impact during hollow fiber membrane bubble point testing, which affects the testing accuracy.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hollow fiber membrane bubble point testing device, comprising a base box, a test groove provided on the upper surface of the base box, and a placement mechanism provided inside the test groove. The placement mechanism includes a lifting platform, a first clamping sleeve, and a second clamping sleeve. The first clamping sleeve is disposed on one side above the lifting platform, and the second clamping sleeve is disposed on the other side above the lifting platform. A fixed base plate is fixedly installed below the first clamping sleeve, and the lower end of the fixed base plate is fixedly connected to the lifting platform. A sliding base plate is fixedly installed below the second clamping sleeve. A sliding groove is provided on the upper surface of the lifting platform, and the lower end of the sliding base plate extends into the interior of the sliding groove.

[0007] Preferably, a handwheel is provided on one side of the lifting platform, and a threaded rod is fixedly installed on the side of the handwheel facing the lifting platform. One end of the threaded rod is threadedly connected to the lifting platform and extends into the interior of the sliding groove to be rotatably connected to the sliding base plate.

[0008] Preferably, guide rods are symmetrically arranged on both sides above the threaded rod, and one end of the guide rod slides into the interior of the sliding groove of the lifting platform and is fixedly connected to the sliding base plate.

[0009] Preferably, a bottom cavity is provided at the bottom of the base box, and a mounting frame is provided inside the bottom cavity. The mounting frame is fixedly connected to the base box, and an electric cylinder is fixedly installed inside the mounting frame. The lower end of the lifting platform slides into the bottom cavity, and the push rod end of the electric cylinder slides to the top of the mounting frame and is fixedly connected to the lifting platform.

[0010] Preferably, a waste liquid tank is fixedly installed inside the bottom cavity of the bottom box, a waste liquid pipe is fixedly installed above the waste liquid tank, an electric valve is fixedly installed above the waste liquid pipe, and the electric valve is fixedly connected to the bottom box and communicates with the test tank.

[0011] Preferably, a back plate is fixedly installed at the rear end of the base box, a top box is fixedly installed above the back plate, an electric cylinder is fixedly installed inside the top box, a transmission column is provided below the top box, a camera is fixedly installed below the transmission column, the push rod end of the electric cylinder extends slidably to the bottom of the top box and is fixedly connected to the transmission column, and a lighting lamp is fixedly installed at the bottom of the test slot inside the base box.

[0012] Preferably, a long flexible tube is fixedly installed on one side of the first sleeve, and an air supply pipe is fixedly installed inside the top box. The air supply pipe is connected to the long flexible tube, and a pressure sensor is fixedly installed on one side of the air supply pipe.

[0013] Preferably, a flow meter is fixedly installed above the first gas supply pipe, a proportional regulating valve is fixedly installed above the flow meter, a second gas supply pipe is fixedly installed above the proportional regulating valve, a pressure reducing valve is fixedly installed above the second gas supply pipe, an air inlet pipe is fixedly installed at the rear end of the pressure reducing valve, and the end of the air inlet pipe away from the pressure reducing valve extends to the rear end of the top box.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] (1) By adopting the fixing structure of the first and second clamps, combined with the adjustable height of the lifting platform and the sliding adaptation function of the slide groove, the utility model can clamp and support hollow fiber membranes of different lengths and specifications, effectively preventing the membrane fibers from shaking or shifting due to airflow impact during the test, improving the reliability and data accuracy of the bubble point test, and increasing its practicality.

[0016] (2) The utility model has a transmission column set below the top box, and a camera is fixedly installed below the transmission column. The camera is connected to an electric cylinder through the transmission column, realizing the automatic lifting and position adjustment functions of the camera. It can also capture image information during the test process, providing strong support for subsequent data analysis and processing, which is beneficial to the hollow fiber membrane bubble point test.

[0017] (3) This utility model achieves precise control and regulation of the test gas by using components such as pressure sensor, flow meter, proportional regulating valve and pressure reducing valve installed on the gas pipeline, ensuring safety during the test process and improving the automation and accuracy of the test. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of a hollow fiber membrane bubble point testing device according to the present invention;

[0019] Figure 2 This is a schematic diagram of the base box of this utility model;

[0020] Figure 3 This is a schematic diagram of the mounting mechanism of this utility model;

[0021] Figure 4 This is a sectional view of the top box of this utility model;

[0022] Figure 5 This is a sectional view of the bottom box of this utility model;

[0023] In the diagram: 1. Base box; 101. Test tank; 102. Bottom cavity; 2. Back plate; 3. Top box; 4. Long flexible hose; 5. Mounting mechanism; 501. Lifting platform; 5011. Slide groove; 502. Sleeve 1; 5021. Fixed base plate; 503. Sleeve 2; 5031. Sliding base plate; 6. Camera; 7. Lighting lamp; 8. Threaded rod; 9. Handwheel; 10. Guide rod; 11. Gas supply pipe 1; 12. Flow meter; 13. Proportional regulating valve; 14. Gas supply pipe 2; 15. Pressure reducing valve; 16. Pressure sensor; 17. Electric cylinder 1; 18. Transmission column; 19. Electric cylinder 2; 20. Mounting bracket; 21. Waste liquid tank; 22. Waste liquid pipe. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0025] Please see Figure 1-5 An embodiment of this utility model provides a hollow fiber membrane bubble point testing device, including a base box 1. A test groove 101 is provided on the upper surface of the base box 1. A placement mechanism 5 is provided inside the test groove 101. The placement mechanism 5 includes a lifting platform 501, a first clamp 502, and a second clamp 503. Both the first clamp 502 and the second clamp 503 have circular grooves inside. The first clamp 502 is located on one side above the lifting platform 501, and the second clamp 503 is located on the other side above the lifting platform 501. A fixed base plate 5021 is fixedly installed below the first clamp 502. The lower end of the fixed base plate 5021 is fixedly connected to the lifting platform 501. A sliding base plate 5031 is fixedly installed below the second clamp 503. A sliding groove 5011 is provided on the upper surface of the lifting platform 501, and the lower end of the sliding base plate 5031 extends into the interior of the sliding groove 5011.

[0026] Both clamping sleeve 1 (502) and clamping sleeve 2 (503) are designed with internal circular grooves to facilitate the insertion and clamping of both ends of the hollow fiber membrane, effectively preventing it from slipping or falling off during testing. Clamping sleeve 1 (502) is fixedly connected to the lifting platform 501 via a fixed base plate 5021. This fixing method ensures the stability of clamping sleeve 1 (502) and provides a reliable support point for one end of the hollow fiber membrane. Clamping sleeve 2 (503) is slidably connected to the sliding groove 5011 on the lifting platform 501 via a sliding base plate 5031. This allows clamping sleeve 2 (503) to be adjusted in position according to the actual length of the hollow fiber membrane to accommodate hollow fiber membranes of different lengths. This helps to maintain stable clamping of the other end of the membrane fiber during testing, preventing it from shaking or shifting due to airflow impact. This improves the accuracy and reliability of the bubble point test and increases its practicality.

[0027] Please see Figure 3 A handwheel 9 is provided on one side of the lifting platform 501. A threaded rod 8 is fixedly installed on the side of the handwheel 9 facing the lifting platform 501. One end of the threaded rod 8 is threadedly connected to the lifting platform 501 and extends into the interior of the slide groove 5011 and is rotatably connected to the sliding base plate 5031. Guide rods 10 are symmetrically arranged on both sides above the threaded rod 8. One end of the guide rod 10 slides into the interior of the slide groove 5011 of the lifting platform 501 and is fixedly connected to the sliding base plate 5031.

[0028] By rotating the handwheel 9, the threaded rod 8 can be driven to rotate, thereby causing the sliding base plate 5031 to slide within the slide groove 5011, thus adjusting the position of the ferrule 503. This can meet the testing requirements of hollow fiber membranes of different lengths. At the same time, the guide rods 10 symmetrically arranged on both sides above the threaded rod 8 provide a stable guiding effect for the sliding base plate 5031, preventing it from shifting or shaking during the sliding process, thus increasing its practicality.

[0029] Please see Figure 5 The bottom cavity 102 is provided at the bottom of the bottom box 1. The mounting bracket 20 is provided inside the bottom cavity 102 and is fixedly connected to the bottom box 1. The electric cylinder 19 is fixedly installed inside the mounting bracket 20. The lower end of the lifting platform 501 slides into the bottom cavity 102. A sealing sleeve is provided at the connection between the lifting platform 501 and the bottom box 1 to prevent the test liquid from flowing out from the edge gap of the lifting platform 501. The push rod end of the electric cylinder 19 slides to the top of the mounting bracket 20 and is fixedly connected to the lifting platform 501.

[0030] By extending and retracting the push rod of the electric cylinder 19, the lifting platform 501 can be driven to slide up and down in the bottom cavity 102, thereby adjusting the height position of the hollow fiber membrane in the test tank 101. This facilitates the immersion of the hollow fiber membrane into the test liquid in the test tank 101 during testing, increasing its practicality.

[0031] Please see Figure 5 A waste liquid tank 21 is fixedly installed inside the bottom cavity 102 of the bottom box 1. A drain pipe with a valve is provided at the rear end of the waste liquid tank 21. A waste liquid pipe 22 is fixedly installed above the waste liquid tank 21. An electric valve is fixedly installed above the waste liquid pipe 22. The electric valve is fixedly connected to the bottom box 1 and communicates with the test tank 101.

[0032] Waste liquid from test tank 101 flows into waste liquid tank 21 through waste liquid pipe 22, avoiding pollution of the test environment. At the same time, a drain pipe with a valve is installed at the rear end of waste liquid tank 21 to facilitate the discharge of waste liquid for subsequent treatment and recycling.

[0033] Please see Figure 1 and Figure 4 A back plate 2 is fixedly installed at the rear end of the bottom box 1. A top box 3 is fixedly installed above the back plate 2. An electric cylinder 17 is fixedly installed inside the top box 3. A transmission column 18 is set below the top box 3. A camera 6 is fixedly installed below the transmission column 18. The camera 6 is electrically connected to the vision inspection module of the processor module of the test device. The push rod end of the electric cylinder 17 slides to the bottom of the top box 3 and is fixedly connected to the transmission column 18. A lighting lamp 7 is fixedly installed at the bottom inside the test slot 101 of the bottom box 1.

[0034] Camera 6 is connected to electric cylinder 17 via transmission column 18, realizing the automatic lifting and position adjustment functions of the camera. Camera 6 is set to capture image information in real time during the test process, providing strong support for subsequent data analysis and processing. At the same time, the lighting lamp 7 fixedly installed inside the test slot 101 provides sufficient lighting conditions for the test process, ensuring that camera 6 can clearly capture test images, thus improving the accuracy and reliability of the test.

[0035] Please see Figure 3 and Figure 4 A long hose 4 is fixedly installed on one side of the ferrule 502. An air supply pipe 11 is fixedly installed inside the top box 3. The air supply pipe 11 is connected to the long hose 4. A pressure sensor 16 is fixedly installed on one side of the air supply pipe 11. A flow meter 12 is fixedly installed above the air supply pipe 11. A proportional regulating valve 13 is fixedly installed above the flow meter 12. An air supply pipe 2 14 is fixedly installed above the proportional regulating valve 13. A pressure reducing valve 15 is fixedly installed above the air supply pipe 2 14. An air inlet pipe is fixedly installed at the rear end of the pressure reducing valve 15, and the end of the air inlet pipe away from the pressure reducing valve 15 extends to the rear end of the top box 3. The air inlet pipe is connected to an external air source device.

[0036] The long flexible tube 4 and the gas supply pipe 11 fixedly installed on one side of the ferrule 502 provide a stable delivery channel for the test gas. The pressure sensor 16, flow meter 12, proportional regulating valve 13 and pressure reducing valve 15 installed on the gas supply pipe 11 enable precise control and regulation of the test gas. The pressure sensor 16 can monitor the gas pressure in the gas supply pipe in real time, the flow meter 12 can measure the gas flow rate and provide accurate gas flow data for the test, the proportional regulating valve 13 can adjust the gas flow rate and pressure as needed, and the pressure reducing valve 15 can reduce the gas pressure of the gas source equipment connected to the inlet pipe, ensuring the safety of the test process and improving the automation and accuracy of the test.

[0037] Working Principle: During use, one end of the hollow fiber membrane is sealed with epoxy resin. The membrane is then securely clamped by the placement mechanism 5. The circular grooves inside the first clamp 502 and the second clamp 503 facilitate the insertion of both ends of the hollow fiber membrane. Sealing rings are provided at both ends of the hollow fiber membrane to seal the two clamps and ensure that the unsealed end of the hollow fiber membrane is inside the first clamp 502. The first clamp 502 is fixedly connected to the lifting platform 501 via the fixed base plate 5021, providing stable support. The second clamp 503 is slidably connected to the sliding groove 5011 on the lifting platform 501 via the sliding base plate 5031, allowing its position to be adjusted according to the actual length of the hollow fiber membrane. Then, the second electric cylinder 19 drives the lifting platform 501 to slide downwards within the bottom cavity 102, allowing the hollow fiber membrane to descend and immerse itself in the test liquid in the test tank 101. During the test, an external gas source device inputs gas through the air inlet pipe. After the pressure is reduced by the pressure reducing valve 15, the gas is then delivered through the air outlet. Gas is delivered to the hollow fiber membrane via gas pipe 14, proportional control valve 13, flow meter 12, gas supply pipe 11, and long hose 4. Pressure sensor 16 monitors gas pressure in real time. Proportional control valve 13 adjusts gas flow and pressure as needed, and flow meter 12 provides accurate gas flow data, thereby achieving precise control and regulation of the test gas. Meanwhile, lighting lamp 7 installed at the bottom of test tank 101 provides sufficient illumination. Camera 6 drives transmission column 18 via electric cylinder 17 to achieve automatic lifting and position adjustment, capturing image information in real time during the test process and transmitting the image information to the vision detection module of the processor module of the test device, providing strong support for subsequent data analysis and processing. Finally, waste liquid in test tank 101 flows into waste liquid tank 21 through waste liquid pipe 22, facilitating subsequent waste liquid treatment and recycling. Thus, through the coordinated work of the above parts, high-precision and high-reliability testing of the bubble point of hollow fiber membrane is achieved, increasing its practicality.

[0038] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A hollow fiber membrane bubble point testing device, comprising a base chamber (1), characterized in that: A test slot (101) is provided on the upper surface of the base box (1). A placement mechanism (5) is provided inside the test slot (101). The placement mechanism (5) includes a lifting platform (501), a first ferrule (502) and a second ferrule (503). The first ferrule (502) is located on one side above the lifting platform (501), and the second ferrule (503) is located on the other side above the lifting platform (501). A fixed base plate (5021) is fixedly installed below the first ferrule (502). The lower end of the fixed base plate (5021) is fixedly connected to the lifting platform (501). A sliding base plate (5031) is fixedly installed below the second ferrule (503). A sliding groove (5011) is provided on the upper surface of the lifting platform (501). The lower end of the sliding base plate (5031) extends into the interior of the sliding groove (5011).

2. The hollow fiber membrane bubble point testing device according to claim 1, characterized in that: A handwheel (9) is provided on one side of the lifting platform (501). A threaded rod (8) is fixedly installed on the side of the handwheel (9) facing the lifting platform (501). One end of the threaded rod (8) is threadedly connected to the lifting platform (501) and extends into the interior of the slide groove (5011) to be rotatably connected to the sliding base plate (5031).

3. The hollow fiber membrane bubble point testing device according to claim 2, characterized in that: Guide rods (10) are symmetrically arranged on both sides above the threaded rod (8). One end of the guide rod (10) slides into the groove (5011) of the lifting platform (501) and is fixedly connected to the sliding base plate (5031).

4. The hollow fiber membrane bubble point testing device according to claim 3, characterized in that: The bottom cavity (102) is provided at the bottom of the bottom box (1). The mounting frame (20) is provided inside the bottom cavity (102) and is fixedly connected to the bottom box (1). An electric cylinder (19) is fixedly installed inside the mounting frame (20). The lower end of the lifting platform (501) slides into the bottom cavity (102). The push rod end of the electric cylinder (19) slides to the top of the mounting frame (20) and is fixedly connected to the lifting platform (501).

5. The hollow fiber membrane bubble point testing device according to claim 4, characterized in that: A waste liquid tank (21) is fixedly installed inside the bottom cavity (102) of the bottom box (1). A waste liquid pipe (22) is fixedly installed above the waste liquid tank (21). An electric valve is fixedly installed above the waste liquid pipe (22), and the electric valve is fixedly connected to the bottom box (1) and communicates with the test tank (101).

6. The hollow fiber membrane bubble point testing device according to claim 1, characterized in that: A back plate (2) is fixedly installed at the rear end of the bottom box (1). A top box (3) is fixedly installed above the back plate (2). An electric cylinder (17) is fixedly installed inside the top box (3). A transmission column (18) is provided below the top box (3). A camera (6) is fixedly installed below the transmission column (18). The push rod end of the electric cylinder (17) slides to the bottom of the top box (3) and is fixedly connected to the transmission column (18). A lighting lamp (7) is fixedly installed at the bottom of the test slot (101) of the bottom box (1).

7. The hollow fiber membrane bubble point testing device according to claim 6, characterized in that: A long hose (4) is fixedly installed on one side of the first sleeve (502), and an air supply pipe (11) is fixedly installed inside the top box (3). The air supply pipe (11) is connected to the long hose (4), and a pressure sensor (16) is fixedly installed on one side of the air supply pipe (11).

8. The hollow fiber membrane bubble point testing device according to claim 7, characterized in that: A flow meter (12) is fixedly installed above the first gas pipe (11). A proportional regulating valve (13) is fixedly installed above the flow meter (12). A second gas pipe (14) is fixedly installed above the proportional regulating valve (13). A pressure reducing valve (15) is fixedly installed above the second gas pipe (14). An air inlet pipe is fixedly installed at the rear end of the pressure reducing valve (15), and the end of the air inlet pipe away from the pressure reducing valve (15) extends to the rear end of the top box (3).

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