Osmotic pressure test barrel and test device
By designing osmotic pressure test barrels and test devices, using the matching sealing structure of the barrel body and clamping sheet, combined with vacuum pumps and pressure sensors, the problems of complex devices and high consumables in the prior art are solved, and simple and low-cost penetration performance testing is achieved.
Patent Information
- Application Number
- CN202421291991.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-06
- Publication Date
- 2025-07-22
- Estimated Expiration
- 2034-06-06
AI Technical Summary
The equipment for prepreg penetration performance testing in the prior art is complex, the consumables cost is high, and the timeliness is low, which affects the accuracy of penetration performance.
An osmotic pressure test barrel was designed, including a barrel body and a clamping sheet. The top of the barrel body has a strip through hole. The clamping sheet is arranged vertically to clamp the prepreg sample. The clamping sheet is matched with the strip through hole to achieve sealing. The test is combined with a vacuum pump and a pressure sensor to simplify the sealing method and reduce the cost of the clamping sheet.
A simple sealing and fixing method is realized, reducing the cost of clamping sheets, and improving the accuracy and timeliness of penetration performance testing.
Smart Images
Figure CN223139324U_ABST
Abstract
Description
Technical Field
[0001] The present disclosure relates to the technical field of osmotic pressure testing, and in particular, to an osmotic pressure testing barrel and a testing device. Background Art
[0002] Prepreg is a composition of a resin matrix and a reinforcement made by impregnating continuous fibers or fabrics with a resin matrix under strictly controlled conditions, and constitutes the basic unit of a composite material. Among them, permeability is an important index for evaluating the performance of prepreg. Too high or too low permeability of prepreg will affect the quality of the final sample.
[0003] In the related art, the devices and equipment for testing the permeability of prepreg are complex, the consumable cost is high, and the timeliness is low, which affects the accuracy of the subsequent prepreg permeability. Summary of the Utility Model
[0004] To solve the problems existing in the related art, according to the first aspect of the present disclosure, the present disclosure provides an osmotic pressure testing barrel, which is applied to an osmotic pressure testing device. The osmotic pressure testing barrel is used to fix a prepreg specimen, and the osmotic pressure testing barrel includes:
[0005] A barrel body having an accommodation cavity, and a strip-shaped through hole communicating the accommodation cavity with the external space of the barrel body is provided at the top of the barrel body. In the test state, the accommodation cavity forms a negative pressure space;
[0006] Two clamping pieces are vertically arranged on the top surface of the barrel body, and the two clamping pieces are arranged oppositely to clamp the prepreg specimen;
[0007] Wherein, in the test state, the arrangement direction of the two clamping pieces is perpendicular to the extension direction and the through direction of the strip-shaped through hole, and in the through direction of the strip-shaped through hole, the prepreg specimen is aligned with the strip-shaped through hole.
[0008] In some embodiments, in the arrangement direction of the two clamping pieces, the sum of the thicknesses of the two clamping pieces is greater than or equal to the size of the strip-shaped through hole.
[0009] In some embodiments, both of the two clamping pieces are acrylic sheets.
[0010] In some embodiments, the barrel body includes a barrel body and a cover plate. The cover plate is located at the top of the barrel body, and the barrel body and the cover plate enclose to form the accommodation cavity;
[0011] The cover plate and the barrel body form a detachable connection, and the strip-shaped through hole penetrates through the cover plate.
[0012] In some embodiments, the cover plate and the barrel body are adhesively connected.
[0013] In some embodiments, the top surface of the cover plate has an adhesive layer.
[0014] In some embodiments, the top surface of the cover plate is a rough surface; and / or,
[0015] the bottom surface of the cover plate is a rough surface.
[0016] In some embodiments, the side of the cover plate is provided with a protrusion, and the protrusion has a circular structure.
[0017] According to a second aspect of the present disclosure, the present disclosure provides an osmotic pressure testing device, including a vacuum pump, a pressure sensor, and the osmotic pressure testing barrel described in the first aspect;
[0018] The vacuum pump and the pressure sensor are respectively arranged on two sides of the osmotic pressure testing barrel and are connected to the osmotic pressure testing barrel through pipe fittings.
[0019] In some embodiments, the osmotic pressure testing device is further provided with a controller and a vacuum ball valve. The vacuum ball valve is located between the vacuum pump and the osmotic pressure testing barrel and is connected to both the vacuum pump and the osmotic pressure testing barrel;
[0020] wherein, the controller is electrically connected to the vacuum pump, the vacuum ball valve, and the pressure sensor.
[0021] The beneficial effects of the present disclosure are as follows: A strip-shaped through hole and two opposite clamping pieces are provided at the top of the barrel body. The prepreg specimen fixed between the two clamping pieces is connected to the internal space of the barrel body through the strip-shaped through hole. The clamping pieces and the strip-shaped through hole are matched in shape to achieve sealing. The sealing method of the testing barrel is simple, the method of fixing the prepreg specimen is simple, and the clamping pieces as consumables have a low cost. Description of the Drawings
[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.
[0023] Figure 1 is a structural diagram of an osmotic pressure testing barrel provided by an exemplary embodiment of the present disclosure;
[0024] Figure 2 is Figure 1 the cross-sectional view taken along A-A in
[0025] Figure 3It is a partial structural diagram of an osmotic pressure test barrel provided by an exemplary embodiment of the present disclosure;
[0026] Figure 4 It is a partial structural schematic diagram of an osmotic pressure test barrel provided by an exemplary embodiment of the present disclosure;
[0027] Figure 5 It is a schematic diagram of an osmotic pressure test device provided by an exemplary embodiment of the present disclosure.
[0028] Description of the drawings: 1. Osmotic pressure test barrel; 2. Barrel body; 21. Barrel body; 22. Cover plate; 221. Protrusion; 23. Accommodation cavity; 24. Connection hole; 3. Clamping piece; 4. Strip-shaped through hole; 5. Vacuum pump; 6. Pressure sensor; 7. Pipe fitting; 8. Vacuum ball valve; 9. Controller; 10. Prepreg sample; 11. Adhesive layer. Detailed implementation manners
[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Apparently, the described embodiments are some but not all of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. It should be noted that, without conflict, the embodiments and the feature vectors in the embodiments in the present disclosure can be combined with each other arbitrarily.
[0030] In the related art, the devices and equipment for testing the penetration performance of prepregs are complex, the consumable costs are high, the timeliness is low, which affects the accuracy of the subsequent penetration performance of prepregs.
[0031] To solve the problems existing in the related art, the embodiments of the present disclosure provide an osmotic pressure test barrel and a test device. The osmotic pressure test barrel is used to fix a prepreg sample. Among them, the osmotic pressure test barrel includes a barrel body and two clamping pieces. The barrel body has an accommodation cavity, and the top of the barrel body has a strip-shaped through hole that communicates the accommodation cavity with the external space of the barrel body. In the test state, the accommodation cavity forms a negative pressure space. The two clamping pieces are vertically arranged on the top surface of the barrel body, and the two clamping pieces are arranged oppositely to clamp the prepreg sample. Among them, in the test state, the arrangement direction of the two clamping pieces is perpendicular to the extension direction and the through direction of the strip-shaped through hole. In the through direction of the strip-shaped through hole, the prepreg sample is aligned with the strip-shaped through hole. In the present disclosure, a strip-shaped through hole and two opposite clamping pieces are provided on the top of the barrel body. The prepreg sample fixed between the two clamping pieces is connected to the internal space of the barrel body through the strip-shaped through hole. The shape matching between the clamping piece and the strip-shaped through hole realizes sealing. The sealing method of the test barrel is simple, the method of fixing the prepreg sample is simple, and the cost of the clamping piece as a consumable is low.
[0032] To make the objectives, technical solutions, and beneficial effects of the embodiments of the present disclosure clearer, the following describes in detail an osmotic pressure test barrel and a test device provided by the embodiments of the present disclosure with reference to the accompanying drawings.
[0033] As Figures 1 to 5 shown, an osmotic pressure test barrel 1 provided by an embodiment of the present disclosure is shown, which is applied to an osmotic pressure test device. The osmotic pressure test barrel 1 is used to fix a prepreg specimen 10. The osmotic pressure test barrel 1 includes a barrel body 2 and two clamping pieces 3. The barrel body 2 is a hollow barrel with one end open, and the shape of the hollow barrel can be adaptively set according to requirements. In one example, as Figures 1 to 3 shown, the barrel body 2 is a cylindrical structure. The barrel body 2 has a receiving cavity 23, and the top of the barrel body 2 has a strip-shaped through hole 4 that communicates the receiving cavity 23 with the external space of the barrel body 2. The strip-shaped through hole 4 is used to communicate the prepreg specimen 10 with the barrel body 2. In the test state, the prepreg specimen 10 is located directly above the strip-shaped through hole 4, so that the prepreg specimen 10 and the receiving cavity 23 in the barrel body 2 form a sealed space. The air in the receiving cavity 23 of the barrel body 2 is extracted, so that the receiving cavity 23 forms a negative pressure space. Then, the outside air will enter the receiving cavity 23 of the barrel body 2 through the prepreg specimen 10, causing the pressure in the barrel body 2 to rise. The osmotic pressure is tested according to the pressure rise, that is, the air permeability of the prepreg specimen 10.
[0034] As Figures 1 to 4 shown, the osmotic pressure test barrel 1 further includes two clamping pieces 3. The two clamping pieces 3 are vertically arranged on the top surface of the barrel body 2, and the two clamping pieces 3 are arranged opposite to each other to clamp the prepreg specimen 10. In one example, continuing to refer to Figure 1 , two clamping pieces 3 are arranged on the barrel body 2 to clamp the prepreg specimen 10, and an adhesive is provided on the contact surface between the two clamping pieces 3. The prepreg specimen 10 is fixed between the two clamping pieces 3 through the adhesive to prevent the prepreg specimen 10 from shifting or falling during the test.
[0035] As Figures 1 to 3 shown, during the osmotic pressure test, the two clamping pieces 3 are arranged along the x direction shown in Figure 2 , the strip-shaped through hole 4 extends along the y direction shown in Figure 3 , and the strip-shaped through hole 4 penetrates along the axial direction of the barrel body 2 (the z direction shown in Figure 2 ). It should be noted that the x direction, y direction, and z direction are perpendicular to each other in pairs. In the penetrating direction of the strip-shaped through hole 4, the prepreg specimen 10 is directly opposite to the strip-shaped through hole 4, so that the outside air passes through the prepreg specimen 10 and enters the receiving cavity 23 of the barrel body 2 through the strip-shaped through hole 4. The shape of the strip-shaped through hole 4 can be a circular strip structure, a long strip structure, etc., as long as the bottom surface of the prepreg specimen 10 matches the top surface of the strip-shaped through hole 4. In one example, asFigure 3 As shown, the shape of the strip-shaped through hole 4 is a rectangular through hole, and the cross-sectional shape of the rectangular through hole is the same as that of the prepreg specimen 10, so that the prepreg specimen 10 covers the strip-shaped through hole 4. The strip-shaped through hole 4 and the accommodation cavity 23 in the barrel 2 form a sealed space, facilitating the entry of external air into the barrel 2 through the prepreg specimen 10.
[0036] It should be noted that the prepreg specimen 10 can be carbon fiber, glass fiber, aramid fiber, thermoplastic fiber, and other fiber-reinforced thermoplastic or thermosetting matrix resins, etc., and the corresponding prepreg specimen can be adaptively selected according to requirements.
[0037] In the present disclosure, a strip-shaped through hole and two opposite clamping pieces are provided at the top of the barrel. The prepreg specimen fixed between the two clamping pieces is connected to the inner space of the barrel through the strip-shaped through hole. The shape matching between the clamping piece and the strip-shaped through hole realizes sealing. The sealing method of the test barrel is simple, the method of fixing the prepreg specimen is simple, and the clamping piece as a consumable has a low cost.
[0038] In some embodiments, as Figures 1 to 4 shown, in the arrangement direction of the two clamping pieces 3 (such as the x direction shown in Figure 1 ), the sum of the thicknesses of the two clamping pieces 3 is greater than or equal to the size of the strip-shaped through hole 4. In one example, as Figure 1 and Figure 3 shown, the two clamping pieces 3 are located at the top of the barrel 2. In the arrangement direction of the two clamping pieces 3 (such as the x direction shown in Figure 1 ), the sum of the thicknesses of the two clamping pieces 3 is greater than the size of the strip-shaped through hole 4, so that the two clamping pieces 3 cover the strip-shaped through hole 4, avoiding leakage at the connection between the two clamping pieces 3 and the strip-shaped through hole 4 during the test, which affects the accuracy of the later prepreg penetration performance.
[0039] In some embodiments, the material of the clamping piece 3 can be a polymer. For example, both of the two clamping pieces 3 can be acrylic sheets. And through the above-mentioned size design of the clamping piece 3 and the strip-shaped through hole 4, the appropriate size of the acrylic sheet can be selected, which can reduce the test cost. In addition, the acrylic sheet also has good transparency and stability, which can facilitate the observation of the clamping state of the prepreg specimen 10 during the test.
[0040] In some embodiments, as Figure 1 and Figure 2As shown, the barrel body 2 includes a barrel body 21 and a cover plate 22. The cover plate 22 is located at the top of the barrel body 21. The barrel body 21 and the cover plate 22 enclose a receiving cavity 23. Among them, the barrel body 21 and the cover plate 22 can be an integral structure or a split structure. In one example, the material of the barrel body 2 is metal. The barrel body 2 made of metal has high strength and a long service life. The barrel body 21 and the cover plate 22 of the barrel body 2 can be a split structure. The barrel body 21 is a cylindrical structure, and the structure of the cover plate 22 can be the same as that of the barrel body 21, so that the cover plate 22 cooperates with the barrel body 21, and the cover plate 22 and the barrel body 21 form a detachable connection. The detachable connection can be a mortise and tenon connection method, an adhesive bonding method, a snap connection method, etc., as long as the cover plate 22 can be connected to the barrel body 21. Among them, the strip-shaped through hole 4 is located on the cover plate 22 and penetrates through the cover plate 22.
[0041] In some embodiments, as Figure 1 and Figure 2 shown, an adhesive layer 11 is provided between the barrel body 21 and the cover plate 22. The cover plate 22 and the barrel body 21 are connected through the adhesive layer 11. For example, the adhesive layer 11 is applied to the edge of the barrel body 2, and the cover plate 22 is connected to the barrel body 21 through the adhesive layer 11, so as to form a sealed space between the cover plate 22 and the barrel body 21, and there is no gap at the connection, avoiding air leakage during the test and thus affecting the test result of the permeability of the prepreg specimen.
[0042] In some embodiments, continue to refer to Figure 1 and Figure 2 , an adhesive layer 11 is provided on the top surface of the cover plate 22. Two clamping pieces 3 are placed on the cover plate 22, so that the two clamping pieces 3 are adhered to each other with no gap at the connection, avoiding air leakage during the test and thus affecting the test result of the permeability of the prepreg specimen.
[0043] In some embodiments, as Figure 1 and Figure 2 shown, the cover plate 22 has a rough surface. For example, the bottom surface of the cover plate 22 has a rough surface, and the shape of the rough surface is the same as the contour of the top surface of the barrel body 2. The roughness of the rough surface can affect the bonding quality. Therefore, in order to ensure the bonding quality between the cover plate 22 and the barrel body 21 and the bonding quality between the cover plate 22 and the two clamping pieces 3, the top surface and the bottom surface of the cover plate 22 are both polished to a roughness of 1.6, so as to improve the surface quality of the cover plate 22, and further improve the accuracy of the permeability test of the prepreg specimen 10. Also, for example, the top surface of the cover plate 22 has a rough surface, and the shape of the rough surface is the same as the contour of the bottom surface of the clamping piece 3, so as to enhance the bonding quality between the cover plate 22 and the clamping piece 3.
[0044] In some embodiments, as Figures 1 to 3As shown, a protrusion 221 is provided on the side of the cover plate 22. The structure of the protrusion 221 can be a square structure, a circular structure, an irregular structure, etc. In one example, as Figure 3 shown, the cover plate 22 and the protrusion 221 are integrated, and the protrusion 221 has a semi-circular structure. The semi-circular protrusion 221 is provided on one side of the cover plate 22, which is convenient for the operator to pick up or place the cover plate 22 during the testing process.
[0045] According to an exemplary embodiment of the present disclosure, as Figure 5 shown, the present disclosure also provides an osmotic pressure testing device, including a vacuum pump 5, a pressure sensor 6, and an osmotic pressure testing barrel 1. The vacuum pump 5 and the pressure sensor 6 are respectively arranged on both sides of the osmotic pressure testing barrel 1. As Figure 1 and Figure 5 shown, the vacuum pump 5 is located on the left side of the osmotic pressure testing barrel 1, and the pressure sensor 6 is located on the right side of the osmotic pressure testing barrel 1. The vacuum pump 5 and the pressure sensor 6 are both connected to the osmotic pressure testing barrel 1 through a pipe fitting 7. Among them, the pipe fitting 7 can be a metal pipe fitting, a glass pipe fitting, a plastic pipe fitting, etc., as long as it can connect the vacuum pump 5 to the barrel body 2. In this regard, the present disclosure does not impose too many restrictions. The vacuum pump 5 is used to evacuate the air in the accommodating cavity 23 of the barrel body 2, so that there is a vacuum chamber in the accommodating cavity 23. The pressure sensor 6 is used to monitor the pressure change data in the accommodating cavity 23. In one example, continue to refer to Figure 1 and Figure 5 , the pressure sensor 6 can be an absolute pressure sensor. The absolute pressure sensor is based on vacuum measurement. In the state where the accommodating cavity 23 is a vacuum chamber, the absolute pressure sensor is used to measure the absolute pressure in the osmotic pressure testing barrel 1. A connection hole 24 is provided on the side surface of the barrel body 21 of the osmotic pressure testing barrel 1. The connection hole 24 penetrates the barrel body 21 along the extension direction of the strip-shaped through hole 4 (such as the y direction shown in Figure 5 ). Sealing taper pipe threads are provided at both ends of the connection hole 24. The sealing taper pipe threads have a sealing effect, are easy to install, and are resistant to high temperature and corrosion. The vacuum pump 5 and the pressure sensor 6 are both connected to the barrel body 2 through the connection hole 24.
[0046] In some embodiments, continue to refer to Figure 5, the osmotic pressure testing device is also provided with a controller 9 and a vacuum ball valve 8. The vacuum ball valve 8 is located between the vacuum pump 5 and the osmotic pressure testing barrel 1, and the vacuum pump 5 is connected to the osmotic pressure testing barrel 1 through the vacuum ball valve 8. The vacuum ball valve 8 can be an electric vacuum ball valve, and the electric vacuum ball valve 8 is used to block or conduct the connection between the vacuum pump 5 and the osmotic pressure testing barrel 1. The controller 9 is located on one side of the pressure sensor 6, and the controller 9 is electrically connected to the vacuum pump 5, the vacuum ball valve 8, and the pressure sensor 6. The controller 9 is used to control the switches of the vacuum pump 5 and the vacuum ball valve 8, and can collect the data of the pressure in the barrel body 2 collected by the pressure sensor 6. In one example, the controller 9 can be a single-chip microcomputer or a computer, etc., as long as it can control the switches of the vacuum pump 5 and the vacuum ball valve 8 and collect the data of the pressure sensor 6. In this regard, no excessive limitation is made in this disclosure.
[0047] The operation steps of an osmotic pressure testing barrel and a testing device according to the present disclosure are as follows:
[0048] As Figures 1 to 5 shown, first, before the prepreg specimen 10 is tested, the barrel body 2 and the cover plate 22 are sealed through the adhesive layer 11, and at the same time, the strip-shaped through hole 4 on the cover plate 22 is sealed, so that a closed space is formed between the inside of the barrel body 2 and the cover plate 22. Then, a sealing inspection is carried out on the osmotic pressure testing barrel 1 in the detection device. The vacuum ball valves 8 on both sides of the osmotic pressure testing barrel 1 and the vacuum pump 5 are opened to evacuate the accommodation cavity 23 of the barrel body 2. After one minute, the valves of the vacuum ball valve 8 and the vacuum pump 5 are closed, and within thirty minutes, the decrease in the vacuum degree in the accommodation cavity 23 of the barrel body 2 is observed. If the decrease in the vacuum degree does not exceed 850 pa, it means that the sealing effect is good. Otherwise, the above steps will be continued to seal the osmotic pressure testing barrel 1, and the sealing inspection will be repeated until the decrease in the vacuum degree does not exceed 850 pa. It should be noted that the waiting time can be set adaptively according to the requirements, and is not limited to the above time interval.
[0049] Next, when the sealing effect reaches the required state, a prepreg specimen 10 with an appropriate width and length is cut according to the requirements. The thickness of the prepreg specimen 10 is measured using a spherical micrometer. Or, since the prepreg specimen 10 is relatively thin, a prepreg specimen 10 with the required thickness can be used, and the length, width, and thickness of the prepreg specimen 10 and other data are recorded. The diaphragm and the backing paper of the prepreg specimen 10 are torn off. The operator holds both ends of the prepreg specimen 10, and places the untouched part of the prepreg specimen 10 between the two clamping pieces 3, and fixes and clamps the prepreg specimen 10 through the adhesive, avoiding contact or bending of the prepreg specimen 10.
[0050] Afterwards, after the adhesive solidifies, cut off the redundant prepreg specimens 10 at both ends of the two clamping pieces 3, open the sealed strip-shaped through holes 4, place the two clamping pieces 3 clamping the prepreg specimens 10 on the cover plate 22 of the barrel body 2 and press them firmly, so that the prepreg specimens 10 are aligned with the strip-shaped through holes 4 on the cover plate 22, and the cover plate 22 and the prepreg specimens 10 are sealed through the adhesive layer 11. Input the parameters such as the length, width and thickness of the prepreg specimens 10 into the value controller 9. The controller 9 records the data in the accommodation cavity 23 detected by the current pressure sensor 6 and starts the osmotic pressure test. It should be noted that after cutting off the redundant prepreg specimens 10 at both ends of the two clamping pieces 3, the osmotic pressure test should be carried out within five minutes.
[0051] Finally, the controller 9 opens the vacuum ball valve 8 and the vacuum pump 5, so that the vacuum pump 5 is connected to the barrel body 2, and the gas in the accommodation cavity 23 of the barrel body 2 is pumped away. After waiting for one minute, close the vacuum ball valve 8 and the vacuum pump 5, and record the pressure value in the accommodation cavity 23 at this time. Then, the outside air will enter the accommodation cavity 23 through the prepreg specimens 10 between the two clamping pieces 3, causing the pressure in the accommodation cavity 23 to rise. The controller 9 collects the data of the air pressure change in the accommodation cavity 23 during this process, selects the data for a required period of time for analysis, and according to the collected data, the controller 9 summarizes and calculates the permeability of the prepreg specimens 10. According to the required number of times of osmotic pressure test of the prepreg specimens 10 to be collected, the above steps can be repeated.
[0052] In the description of the present disclosure, it should be understood that the orientation or positional relationship indicated by the terms "top surface", "bottom surface", "left", "right", "vertical", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present disclosure.
[0053] In addition, the terms "first", "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0054] In this disclosure, unless otherwise clearly defined and limited, terms such as "installation", "connection", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, a direct connection, or an indirect connection through an intermediate medium. It can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in this disclosure can be understood according to specific circumstances.
[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this disclosure, rather than to limit them; although the above embodiments of this disclosure have been described in detail, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the above embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of this disclosure.
Claims
1. An osmotic pressure test barrel, characterized in that, Applied to an osmotic pressure testing device, the osmotic pressure testing barrel is used to fix a prepreg sample, and the osmotic pressure testing barrel includes: A barrel body having a receiving cavity, and a strip-shaped through hole communicating the receiving cavity with the external space of the barrel body is provided at the top of the barrel body. In the test state, the receiving cavity forms a negative pressure space; Two clamping pieces are vertically arranged on the top surface of the barrel body, and the two clamping pieces are arranged oppositely to clamp the prepreg sample; Wherein, in the test state, the arrangement direction of the two clamping pieces is perpendicular to the extension direction and the through direction of the strip-shaped through hole, and in the through direction of the strip-shaped through hole, the prepreg sample is aligned with the strip-shaped through hole.
2. The osmotic pressure test barrel according to claim 1, wherein In the arrangement direction of the two clamping pieces, the sum of the thicknesses of the two clamping pieces is greater than or equal to the size of the strip-shaped through hole.
3. The osmotic pressure test barrel according to claim 1 or 2, characterized in that, Both of the two clamping pieces are acrylic sheets.
4. The osmotic pressure test barrel according to claim 1, wherein The barrel body includes a barrel body and a cover plate. The cover plate is located at the top of the barrel body, and the barrel body and the cover plate enclose to form the receiving cavity; The cover plate and the barrel body are detachably connected, and the strip-shaped through hole penetrates through the cover plate.
5. The osmotic pressure test barrel according to claim 4, characterized in that, The cover plate and the barrel body are adhesively connected.
6. The osmotic pressure test barrel according to claim 4, characterized in that, The top surface of the cover plate has an adhesive layer.
7. The osmotic pressure test barrel according to claim 5 or 6, characterized in that The top surface of the cover plate is a rough surface; and / or, The bottom surface of the cover plate is a rough surface.
8. The osmotic pressure test barrel according to claim 4, characterized in that, A protrusion is provided on the side of the cover plate, and the protrusion has a circular structure.
9. An osmotic pressure testing device, characterized in that, Including a vacuum pump and a pressure sensor, and the osmotic pressure testing barrel according to any one of claims 1-8; The vacuum pump and the pressure sensor are respectively arranged on both sides of the osmotic pressure testing barrel and are connected to the osmotic pressure testing barrel through pipe fittings.
10. The osmotic pressure testing device according to claim 9, wherein, The osmotic pressure testing device is further provided with a controller and a vacuum ball valve. The vacuum ball valve is located between the vacuum pump and the osmotic pressure testing barrel and is connected to both the vacuum pump and the osmotic pressure testing barrel; Wherein, the controller is electrically connected to the vacuum pump, the vacuum ball valve and the pressure sensor respectively.