Polytetrafluoroethylene material hydrophilicity detection device

Abstract

The utility model relates to the technical field of material detection, and discloses a polytetrafluoroethylene material hydrophilicity detection device which comprises a detection table, a flow guide frame, a storage tank and an abutting assembly, and a valve is fixedly connected to the outer wall of the lower portion of the storage tank and used for automatically and quantitatively discharging water; the flow guide frame is obliquely arranged, one end of the flow guide frame is located below the valve, the other end of the flow guide frame extends to the position above the detection table and is used for slowly conveying water to the detection table, and the flow guide frame is further rotationally connected with a shifting plate used for adjusting the water flow direction. The two abutting assemblies are located on the two sides of the detection table correspondingly and used for fixing and pressing the PTFE membrane material to be detected. The device can replace part of manual operation, so that the detection result deviation caused by human factors is reduced, the consistency of the detection result is ensured, and the detection structure is more stable and reliable.

Description

Technical Field

[0001] This utility model relates to the field of materials testing technology, specifically to a device for testing the hydrophilicity of polytetrafluoroethylene (PTFE) materials. Background Technology

[0002] Polytetrafluoroethylene (PTFE) is a high-performance synthetic polymer, usually appearing as a white, waxy solid. It is a fluoroplastic with excellent chemical stability and high-temperature resistance. Hydrophilicity is an interfacial phenomenon of water on a material surface. The wetting process is essentially a change in the properties and energy of the material interface. When the cohesive force between water molecules is less than the attraction between water molecules and solid material molecules, the material is wetted by water, and this material is hydrophilic. When the cohesive force between water molecules is greater than the attraction between water molecules and material molecules, the surface of the material cannot be wetted by water, and this material is hydrophobic.

[0003] Polytetrafluoroethylene (PTFE) is a common microporous filtration membrane material. For the filtration of aqueous solutions, hydrophilic modified PTFE membranes are usually required. Hydrophilic modified PTFE membranes can reduce resistance and energy consumption during filtration.

[0004] There are many methods for testing hydrophilicity. One method is to test the hydrophilicity of PTFE membranes by directly observing the effect of water immersion on the material surface and the time it takes for the material surface to be immersed in water. The specific procedure is to manually pour a certain amount of water evenly over a certain area on the surface of the PTFE membrane to be tested, and then observe whether the water is completely absorbed, while recording the time it takes for the water to be absorbed. This allows for a rough assessment of the hydrophilicity of the PTFE membrane.

[0005] However, the test results are greatly affected by human intervention when water is poured manually, which may lead to the following problems:

[0006] First, manually pouring water may not result in the water being poured evenly onto the surface of the PTFE membrane, thus affecting the test results;

[0007] Secondly, when manually pouring water, improper operation can easily generate a large impact force, which may not only cause water droplets to be splashed onto the surface of the PTFE membrane to be tested, thus affecting the test results, but also cause the PTFE membrane to be tested to deform or shift, thus affecting the final test results.

[0008] To address this, a device for detecting the hydrophilicity of polytetrafluoroethylene (PTFE) materials is proposed. Utility Model Content

[0009] The purpose of this invention is to provide a device for testing the hydrophilicity of polytetrafluoroethylene (PTFE) materials, so as to solve the problems mentioned in the background art.

[0010] To achieve the above objectives, this utility model provides the following technical solution: a device for testing the hydrophilicity of polytetrafluoroethylene (PTFE) materials, comprising a frame, wherein the frame is provided with a testing platform, a flow guide frame, a storage tank, and an abutment assembly.

[0011] A valve is fixedly connected to the lower outer wall of the storage tank for automatic quantitative water dispensing;

[0012] The guide frame is inclined, with one end located below the valve and the other end extending above the testing platform, for gently conveying water horizontally to the testing platform. A lever for adjusting the direction of water flow is also rotatably connected to the guide frame.

[0013] The abutment assembly consists of two sets, located on both sides of the testing platform, for fixing and pressing the PTFE membrane material to be tested.

[0014] Preferably, the abutment assembly includes a support plate, a hinge plate is rotatably connected to the top of the support plate, an electric telescopic rod is rotatably connected to the middle of the front side of the support plate, the telescopic rod end of the electric telescopic rod is rotatably connected to the middle of the outer wall of the hinge plate, a connecting plate is fixedly connected to the end of the hinge plate away from the support plate, and an abutment pad is installed at the bottom of the connecting plate.

[0015] Preferably, pins are slidably connected to both sides of the middle portion of the connecting plate, and abutment pads are fixedly connected to the bottom ends of the pins. A connecting spring is sleeved on the outer wall of each pin, with one end of the connecting spring fixedly connected to the connecting plate and the other end of the connecting spring fixedly connected to the abutment pad.

[0016] Preferably, a collection frame is connected to the front side of the detection station.

[0017] Preferably, an output pipe is fixedly connected to the bottom of the collection frame, and a solenoid valve is fixedly connected to the output pipe.

[0018] Preferably, the frame is equipped with a control module, which is electrically connected to the valve, the electric telescopic rod, and the solenoid valve.

[0019] Preferably, the top of the storage tank is movably connected to a cover plate, and a pull button is fixedly connected to the surface of the cover plate.

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] 1. By using the flow guide frame, water can flow more smoothly to the surface of the PTFE membrane to be tested, reducing impact and solving the problem of PTFE membrane displacement caused by direct spraying or excessive flow rate in the existing technology. This ensures the stability of the PTFE membrane position during testing.

[0022] 2. By moving the lever back and forth, the direction of water flow can be adjusted, which can not only increase the detection position or detection area, but also ensure that the water can be evenly distributed on the surface of the material to be tested.

[0023] 3. The two ends of the PTFE membrane are pressed together by two sets of abutment components to keep it fixed and prevent positional displacement, thus further ensuring the stability of the PTFE membrane position during testing. Attached Figure Description

[0024] Figure 1 This is a three-dimensional schematic diagram of the overall device of this utility model;

[0025] Figure 2 This is a rear view schematic diagram of the overall device of this utility model;

[0026] Figure 3 This is a top view of the overall device of this utility model;

[0027] Figure 4 This is a bottom view of the overall device of this utility model.

[0028] In the picture:

[0029] 1. Testing platform; 2. Flow guide frame; 3. Storage tank; 4. Pull button; 5. Cover plate; 6. Valve; 7. Toggle plate; 8. Support plate; 9. Electric telescopic rod; 10. Hinge plate; 11. Connecting plate; 12. Pin rod; 13. Connecting spring; 14. Abutment pad; 15. Collection frame; 16. Control module; 17. Output pipe; 18. Solenoid valve. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Please see Figures 1 to 4 Here is one embodiment of the present invention: A hydrophilicity testing device for polytetrafluoroethylene material, comprising a frame, wherein a testing platform 1, a flow guide frame 2, a storage tank 3, and an abutment component are provided on the frame.

[0032] The storage tank 3 has a cavity with an opening at the top for storing water for hydrophilicity testing. A cover plate 5 is detachably provided on the top of the storage tank 3, and a pull button 4 is fixedly connected to the surface of the cover plate 5. When water needs to be added, the cover plate can be easily opened by pulling the pull button 4 to add water.

[0033] A valve 6 is fixedly connected to the lower outer wall of the storage tank 3. The valve is a solenoid valve or an electric valve to facilitate automatic control. A flow meter can be installed at the outlet of the valve to control the water output by monitoring the flow rate. Alternatively, the water output can be controlled by controlling the valve opening time, thereby achieving automatic and quantitative water output.

[0034] The guide frame 2 is inclined, with one end located below the valve 6 and the other end extending above the testing platform 1. After the water in the storage tank 3 is sent out through the valve 6, it will first fall onto the guide frame 2 and then flow smoothly along the guide frame to the testing platform 1. This avoids the problem of excessive impact caused by the water coming out of the valve 6 too quickly. It can solve the problem of positional displacement of the PTFE membrane under test caused by direct spraying or excessive flow rate during manual operation in the prior art, and can ensure the stability of the PTFE membrane position during testing.

[0035] A lever 7 is rotatably connected to the flow guide frame 2. The bottom surface of the lever is in contact and sealed with the bottom surface of the flow guide frame. The lever can automatically rotate and swing via a built-in electrically controlled push rod or a reduction motor (not shown in the figure) at the bottom. Rotation of the lever allows for adjustment of the water flow direction. For example, when the lever is on the left (one end near valve 6 is on the left side of the valve, and the other end is on the right side), water flowing from the valve into the flow guide frame 2 and down the flow guide frame will be guided to the right by the lever 7. Similarly, when the lever is on the right (one end near valve 6 is on the right side of the valve, and the other end is on the left side of the valve), water flowing from the valve into the flow guide frame 2 and down the flow guide frame will be guided to the left by the lever 7. In other words, the lever allows for simultaneous hydrophilicity detection at both the left and right positions on the PTFE membrane, increasing the detection range. Furthermore, by slowly swinging the lever, the direction of local water flow when on the left or right side can be changed, thereby further increasing the detection area, which is more conducive to observation, and can ensure that the water can be evenly distributed to the surface of the material to be tested.

[0036] The abutment components are provided in two sets, which are located on both sides of the testing stage 1 respectively. They are used to fix and press the PTFE membrane material to be tested. By pressing the two ends of the PTFE membrane with the two sets of abutment components, the membrane is kept fixed and positional displacement is avoided, which further ensures the stability of the PTFE membrane position during testing.

[0037] There are many types of abutment components. Their structure mainly includes an abutment pad and a power source that drives the abutment pad to move up and down. By driving the abutment pad to move downward, the PTEF membrane to be tested can be pressed tightly.

[0038] In this embodiment, the abutment assembly includes a support plate 8, a hinge plate 10 is rotatably connected to the top of the support plate 8, an electric telescopic rod 9 is rotatably connected to the middle of the front side of the support plate 8, the telescopic rod end of the electric telescopic rod 9 is rotatably connected to the middle of the outer wall of the hinge plate 10, a connecting plate 11 is fixedly connected to the end of the hinge plate 10 away from the support plate 8, and an abutment pad is installed at the bottom of the connecting plate. Through the telescopic movement of the electric telescopic rod 9, the hinge plate 10 can be driven to swing, thereby driving the abutment pad to move up and down.

[0039] Furthermore, pins 12 are slidably connected to both sides of the middle portion of the connecting plate 11. Abutment pads 14 are fixedly connected to the bottom ends of each pin 12. Connecting springs 13 are sleeved on the outer walls of each pin 12. One end of each connecting spring 13 is fixedly connected to the connecting plate 11, and the other end is fixedly connected to the abutment pads 14. The connecting springs 13 provide buffering for the contact between the abutment pads 14 and the PTFE membrane, maintaining the stability of the PTFE membrane and improving test repeatability. Even with multiple tests, the same test conditions and results can be maintained, facilitating data comparison and analysis. Fixing the PTFE membrane reduces the occurrence of unexpected situations due to positional changes, improving the safety of experimental operations.

[0040] The frame is also equipped with a collection frame 15, which is located on the front side of the testing station 1. The collection frame 15 can recycle and store water stains remaining on the testing station and water absorbed by the PTFE membrane. An output pipe 17 is fixedly connected to the bottom of the collection frame 15, and a solenoid valve 18 is fixedly connected to the output pipe 17. When the collection frame 15 collects too much water, the solenoid valve 18 is opened, and the water can be discharged through the output pipe 17. After filtration, the water can be reused.

[0041] The frame is equipped with a control module 16, which is electrically connected to the valve 6, the electric telescopic rod 9, and the solenoid valve 18. Specifically, the control module 16 can be a PLC control system commonly used in industrial automation equipment. The PLC control system has functions such as input signal recognition and processing, control algorithm calculation, output signal generation and driving, and feedback signal acquisition and closed-loop control. It can control the valve 6, the electric telescopic rod 9, and the solenoid valve 18 to achieve automatic operation according to instructions.

[0042] The hydrophilicity detection process using the above-mentioned device is as follows:

[0043] The first step is to inject water for testing into storage tank 3 to ensure that storage tank 3 has enough water;

[0044] The second step is to lay the PTFE membrane to be tested flat on the testing platform 1. This can be done by laying only one layer of membrane or multiple layers of membrane.

[0045] The third step involves activating the control module. First, the electric telescopic rod 9 on the support plate 8 drives the hinge plate 10 to rotate, which in turn moves the connecting plate 11 downward. As the connecting plate 11 moves, the two side abutment pads 14 come into contact with the PTFE membrane on the testing table 1, pressing the two ends of the PTFE membrane to keep it fixed and prevent positional displacement. Then, the valve 6 opens, and the water in the storage tank 3 flows out of the valve and flows smoothly downward along the guide frame 2. At the same time, the lever 7 swings under the drive of the reduction motor to adjust and guide the water flow, ensuring that the water is evenly sprayed on the designated position on the surface of the PTFE membrane. When the valve opening time reaches the preset time or the valve flow rate reaches the preset flow rate value, the valve 6 automatically closes.

[0046] The fourth step involves the testing personnel observing the water absorption on the membrane surface and recording the time required for the water to be completely absorbed, and then providing a hydrophilicity rating based on this.

[0047] Fifth step, operate the control module again to end the work. Under the action of the support plate 8, electric telescopic rod 9 and hinge plate 10, the contact pad 14 moves upward and separates from the PTFE membrane.

[0048] The sixth step is to remove the PTFE membrane after testing and clean up any remaining water stains on the workbench. Then, the hydrophilicity performance test of the next set of membranes can be repeated.

[0049] The above-mentioned device can replace the manual water-pouring operation, thereby reducing the deviation of test results caused by human factors, ensuring the consistency of test results, and making the test structure more stable and reliable.

[0050] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A polytetrafluoroethylene material hydrophilicity detection device, characterized by: Including frame, the frame is equipped with detection platform (1), diversion frame (2), storage tank (3), abutment assembly, The lower outer wall of the storage tank (3) is fixedly connected with a valve (6), which is used for automatic quantitative water output; The diversion frame (2) is inclinedly arranged, one end of which is located below the valve (6), and the other end extends above the detection platform (1), which is used for gently conveying water to the detection platform (1), and the diversion frame (2) is further rotatably connected with a dial plate (7) for adjusting the direction of water flow; The abutment assembly is provided with two groups and is located at both sides of the detection platform (1), which is used for fixing and pressing the PTFE film material to be detected.

2. The device for detecting hydrophilicity of a polytetrafluoroethylene material according to claim 1, characterized by: The abutment assembly includes a support plate (8), the top end of the support plate (8) is rotatably connected with a hinged plate (10), the front side of the support plate (8) is rotatably connected with an electric telescopic rod (9), the telescopic rod end of the electric telescopic rod (9) is rotatably connected with the outer wall of the middle part of the hinged plate (10), the end of the hinged plate (10) away from the support plate (8) is fixedly connected with a connecting plate (11), and the bottom of the connecting plate is provided with an abutment pad.

3. The device for detecting hydrophilicity of a polytetrafluoroethylene material according to claim 2, characterized by: The middle part of the connecting plate (11) is slidably connected with a pin rod (12), the bottom end of the pin rod (12) is fixedly connected with an abutment pad (14), the outer wall of the pin rod (12) is sleeved with a connecting spring (13), one end of the connecting spring (13) is fixedly connected with the connecting plate (11), and the other end of the connecting spring (13) is fixedly connected with the abutment pad (14).

4. The device for detecting hydrophilicity of polytetrafluoroethylene material according to claim 2, characterized in that: The front side of the detection platform (1) is connected with a collection frame (15).

5. The device for detecting hydrophilicity of a polytetrafluoroethylene material according to claim 4, characterized by: The bottom of the collection frame (15) is fixedly connected with an output pipe (17), and the output pipe (17) is fixedly connected with a solenoid valve (18).

6. The device of claim 5, wherein: The frame is provided with a control module (16), and the control module (16) is electrically connected with the valve (6), the electric telescopic rod (9) and the solenoid valve (18).

7. The device of claim 1, wherein the device is a hydrophilicity detection device for polytetrafluoroethylene materials. The top of the storage tank (3) is movably connected with a cover plate (5), and the surface of the cover plate (5) is fixedly connected with a pull knob (4).

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