A sample clamping device and method for film penetration detection

Abstract

The present invention provides a sample clamping device and method for film penetration detection, which relates to the technical field of film penetration detection, including: a box body, a plurality of detection boxes are arranged inside the box body, a sealing cover is threadedly connected to the top of the detection box, a placement ring is arranged inside the detection box, and a pressure ring is arranged on the top of the placement ring; a clamping assembly arranged between the placement ring and the pressure ring; a sealing assembly arranged between the sealing cover and the detection box; and a fixing assembly arranged between the placement ring and the detection box. This device can clamp and fix the film through the clamping assembly, and at the same time has a positioning effect on the pressure ring, and can straighten and flatten the film through the clamping plate. The blocking assembly can block the conduit when the sealing cover is not completely covered, so as to avoid leakage of the permeate and affect the data of the permeate sample. The sealing assembly can reduce the occurrence of leakage during the permeation test, and ensure the normal implementation of the permeation test.

Description

Technical Field

[0001] The invention relates to the technical field of film penetration detection, in particular to a sample clamping device and a method thereof for film penetration detection. Background Art

[0002] Film permeation testing is a test method used to measure the gas or liquid permeability of film materials (such as plastic films, composite films, coating films, etc.). It is an important means to evaluate the barrier properties of films. Films are widely used in packaging, construction, environmental engineering, agriculture and many other fields, and their barrier properties directly affect product shelf life, energy efficiency and environmental protection.

[0003] In thin film penetration testing, the cut film sample is generally clamped by the edge of the sample by hand or with tweezers. After it is sent to the vicinity of the test chamber, both hands cooperate to place the sample in the test area, which is inconvenient to operate. Most film samples are very thin and do not have sufficient strength. When the sample edge is clamped by hand or tweezers, the sample is deformed. This deformation will directly lead to incorrect test data or directly lead to the termination of the test process. For this purpose, a sample clamping device and a film penetration testing equipment for thin film penetration testing are disclosed. CN202022198482.X is disclosed. By setting a pressing plate, a magnetic pad and a tray, the sample is clamped by magnetic adsorption, which not only ensures the stability of the clamping, but also facilitates sample replacement. However, there are still certain defects in use. During the penetration test, due to a certain pressure difference on both sides of the film, the pressing plate is prone to position displacement during the penetration process, resulting in a decrease in the fixing effect on the film. At the same time, when the pressing plate is placed, it is necessary to ensure that the position of the pressing plate and the magnetic pad corresponds. Once the displacement occurs, it will affect the fixing effect on the film. Summary of the invention

[0004] The present invention aims to solve the shortcomings of the background technology and provide a sample clamping device and method for film penetration detection, which solves the problem that the existing film is not firmly fixed and is easy to fall off during the test.

[0005] Specifically, through the setting of the clamping component, the film can be clamped and fixed, and the pressure ring can be positioned at the same time, and the film can be straightened and flattened by the clamping plate to ensure the accuracy of the detection. Through the setting of the sealing component, the catheter can be sealed when the sealing cover is not completely covered, thereby avoiding the leakage of the permeate and affecting the data of the permeate sample, effectively reducing the loss of the sample and improving the accuracy of the sample detection. Through the setting of the sealing component, the occurrence of leakage during the permeation test can be reduced to ensure the normal progress of the permeation test.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a sample clamping device for film penetration testing, comprising: a box body, a plurality of test boxes are arranged inside the box body, a sealing cover is threadedly connected to the top of the test box, a conduit is connected to the top of the sealing cover, a placement ring is arranged inside the test box, and a pressure ring is arranged on the top of the placement ring; a clamping assembly arranged between the placement ring and the pressure ring, for clamping and fastening the test sample; a sealing assembly arranged between the sealing cover and the test box, for reducing the influence of leakage on the penetration test; and a plugging assembly arranged inside the sealing cover, for plugging the conduit.

[0007] Furthermore, the clamping assembly comprises:

[0008] A placement groove is provided on the top of the placement ring;

[0009] A plurality of jacks are provided on the upper surface of the placement ring, and the jacks are evenly distributed in a circular array, and a plurality of plug blocks matching the jacks are connected to the bottom of the pressure ring;

[0010] A moving groove is provided inside the placement ring and communicates with the insertion hole;

[0011] A movable plate is arranged inside the movable groove, a plurality of receiving grooves communicating with the placing groove are opened inside the placing ring, a clamping plate is arranged inside the receiving groove, and a plurality of inclined grooves are opened inside the placing ring.

[0012] Furthermore, an inclined surface is provided at the bottom end of the plug block, and the position of the plug block corresponds to the position of the plug hole, and the positions of the plurality of storage slots, the plug hole and the movable slots correspond to each other.

[0013] Furthermore, a return spring is connected to the movable groove, and one end of the return spring is connected to the movable plate, one end of the movable plate extends into the socket and is provided with an inclined surface, a plurality of extrusion grooves are opened on the top of the movable plate, a plurality of inclined rods are connected to the bottom of the clamping plate, and the bottom end of the inclined rod extends into the extrusion groove through the inclined groove and is provided with an inclined surface.

[0014] Furthermore, the sealing assembly comprises:

[0015] Two rubber blocks connected to the top of the detection box, and two sealing holes matching with the rubber blocks are opened at the bottom of the placement ring;

[0016] A rubber pad arranged at the bottom of the placement ring, wherein the rubber pad is provided with an opening corresponding to the position of the sealing hole;

[0017] A sealing ring provided on the inner wall of the bottom of the sealing cover;

[0018] A sealing groove is provided at the top of the detection box, a sealing ring used in conjunction with the sealing groove is connected to the bottom of the sealing cover, and a conduit is connected to the top of the sealing cover.

[0019] Furthermore, the blocking component:

[0020] A mounting block connected to the bottom of the sealing cover, wherein the cross section of the mounting block is a circular structure, the bottom end of the mounting block extends into the pressure ring, and the cross-sectional profile of the mounting block matches the cross-sectional size of the internal space of the pressure ring;

[0021] A blocking groove is provided inside the mounting block, and the blocking groove is communicated with the conduit;

[0022] A blocking plate is arranged inside the blocking groove, and the cross-sectional area of ​​the blocking plate is larger than the cross-sectional area of ​​the conduit.

[0023] Furthermore, a transmission groove is opened on one side of the mounting block, and a transmission rod is provided inside the transmission groove, one end of the transmission rod protrudes from the outer surface of the mounting block and is provided with an inclined surface, one end of the transmission rod is connected to an ejection spring, and one end of the ejection spring is connected to the transmission groove.

[0024] Furthermore, a transmission gear bar is connected to the side of the blocking plate away from the conduit, a connecting groove communicating with the transmission groove and the blocking groove is opened inside the mounting block, a transmission gear is rotatably connected inside the connecting groove through a bearing, a mating tooth meshing with the transmission gear is provided at the bottom of the transmission rod, and the transmission gear is meshed and connected with the transmission gear bar.

[0025] Furthermore, a baffle is provided inside the box body, a storage cavity is provided on the side of the baffle away from the detection box, an electric push rod is connected to the top of the box body, a piston is connected to the bottom of the electric push rod, a sensor plate is provided inside the storage cavity, a pressure sensor a is installed at the bottom of the sensor plate, a pump a is installed on the top of the box body, a pump b is installed on one side of the detection box, a pressure plate is provided inside the detection box, a pressure sensor b is installed at the bottom of the pressure plate, a delivery pipe is connected to one side of the baffle, and a solenoid valve is provided in the delivery pipe.

[0026] Further, a method for a sample clamping device for film penetration detection comprises the following steps:

[0027] S1. Fix the film sample, place the film sample in the placement groove, and then cover the placement ring with a pressure ring. At this time, the placement ring and the pressure ring can be positioned by setting the jack and the plug block. At the same time, the sample is fixed between the placement ring and the pressure ring by setting the clamping plate, the inclined rod and the moving plate. At the same time, the sample is pulled outward to ensure the flatness and straightness of the test;

[0028] S2, placing the placement ring and the pressure ring into the detection box, and then fixing the sealing cover to the detection box through threads. At this time, the gap between the sealing cover and the detection box can be sealed by setting the sealing ring and the sealing groove;

[0029] S3. Through the setting of the rubber pad and the sealing ring, the placement ring and the pressure ring can be clamped and fixed to prevent the pressure ring and the placement ring from positional displacement, and to avoid the placement ring and the pressure ring from hard collision with the sealing cover and the detection box. At the same time, through the setting of the positioning groove and the transmission block, the placement ring can be positioned;

[0030] S4. After the sealing cover is threadedly connected to the detection box, the mounting block extends into the pressure ring, and the blocking plate is moved away from the conduit through the transmission rod, transmission gear and transmission gear bar, thereby opening the conduit;

[0031] S5. After the sample is clamped, fixed and placed, a penetration test is performed. The liquid medium is pumped into the storage chamber by pump a and filled up before storage. At this time, the weight of the liquid medium is recorded by pressure sensor a.

[0032] S6. Create an osmotic pressure difference. When conducting the test, the electric push rod drives the piston downward, so that the liquid medium in the storage chamber is pressed into the delivery tube and enters the sealing cover through the catheter. At this time, as the piston moves, the pressure in the storage chamber gradually rises, so that a pressure difference is generated on both sides of the film, forming an osmotic driving force;

[0033] S7. After waiting for a certain period of time, the piston is lifted. At this time, the weight of the liquid medium in the storage chamber is recorded again through the pressure sensor a, and the weight of the liquid medium infiltrated in the detection box is recorded through the pressure sensor b to facilitate the subsequent calculation of the permeability of the film.

[0034] The present invention provides a sample clamping device and method for film penetration detection, which have the following beneficial effects:

[0035] The invention has the advantages that, through the setting of the clamping assembly, the film can be clamped and fixed, and the pressure ring can be positioned at the same time, and then the film can be straightened and flattened through the inclined moving path of the clamping plate to ensure the accuracy of the detection;

[0036] Secondly, by setting the plugging component, the catheter can be plugged when the sealing cover is not completely covered, avoiding leakage of the permeate and affecting the data of the permeate sample, effectively reducing the loss of the sample and improving the accuracy of the sample detection;

[0037] Next, by setting up the sealing assembly, the occurrence of leakage during the penetration test can be reduced, ensuring the normal progress of the penetration test. At the same time, the rubber pad and the sealing ring can protect the pressure ring and the placement ring to reduce the damage caused by hard contact. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0039] Figure 2 It is a cross-sectional view of the overall structure of the present invention.

[0040] Figure 3 It is a cross-sectional view of the sealing cover structure of the present invention.

[0041] Figure 4 It is a half-section diagram of the detection box structure of the present invention.

[0042] Figure 5 It is a half-section view of the sealing cover structure of the present invention.

[0043] Figure 6 It is a schematic diagram of the sealing cover structure of the present invention from another angle.

[0044] Figure 7 It is a schematic diagram of the placement ring structure of the present invention.

[0045] Figure 8 It is a schematic diagram of another angle of the placement ring structure of the present invention.

[0046] Fig. 9 It is a schematic diagram of the jack structure of the present invention.

[0047] Fig.10 It is a schematic diagram of the clamping plate structure of the present invention.

[0048] Fig.11 For the present invention Figure 3 Enlarged view of point A in .

[0049] Fig.12 For the present invention Figure 3 Enlarged view of point B in .

[0050] Fig.13 It is a schematic diagram of the method of use of the present invention.

[0051] Figure 1-13In: 1. Box; 101. Baffle; 102. Storage chamber; 103. Pressure sensor a; 104. Induction plate; 105. Delivery pipe; 106. Conduit; 2. Electric push rod; 201. Piston; 202. Pump a; 3. Detection box; 301. Pump b; 302. Pressure plate; 303. Pressure sensor b; 304. Rubber block; 305. Sealing groove; 306. Positioning groove; 4. Sealing cover; 401. Sealing ring; 402. Sealing ring; 403. Mounting block; 404. Blocking groove; 405, transmission gear bar; 406, blocking plate; 407, transmission groove; 408, transmission rod; 409, transmission gear; 5, pressure ring; 501, plug block; 6, placement ring; 601, plug hole; 6011, sealing hole; 6012, rubber pad; 6013, opening; 602, moving groove; 603, return spring; 604, moving plate; 605, extrusion groove; 606, placement groove; 6061, storage groove; 607, inclined groove; 608, inclined rod; 609, clamping plate. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0053] The disclosure below provides many different embodiments or examples to realize the different structures of the present application. In order to simplify the disclosure of the present application, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present application. In addition, the present application can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the various specific processes and material examples provided by the present application, but those of ordinary skill in the art can appreciate the application of other processes and / or the use of other materials.

[0054] The embodiment of the present application provides a sample clamping device and method for film penetration detection. The sample clamping device and method for film penetration detection can achieve the purpose of clamping and fixing the film through the setting of the clamping component, while ensuring the positioning effect of the pressure ring, and the film is secondarily fixed by the extrusion plate to improve the fixing effect of the film. Through the setting of the fixing component, the position of the pressure ring can be limited during the penetration test to prevent the pressure ring from being offset, resulting in a decrease in the fixing effect of the film. Through the setting of the sealing component, the occurrence of leakage during the penetration test can be reduced to ensure the normal conduct of the penetration test. The sample clamping device and method for film penetration detection are described in detail below. It should be noted that the description order of the following embodiments does not limit the preferred order of the embodiments.

[0055] The present application is described in detail below with reference to the accompanying drawings and specific implementation methods. Example 1

[0056] See also Figure 1-13 In the embodiment, a sample clamping device for film penetration detection is provided, comprising: a box body 1, a plurality of test boxes 3 are arranged inside the box body 1, a sealing cover 4 is threadedly connected to the top of the test box 3, a conduit 106 is connected to the top of the sealing cover 4, a placement ring 6 is arranged inside the test box 3, and a pressure ring 5 is arranged on the top of the placement ring 6; a clamping component arranged between the placement ring 6 and the pressure ring 5, for clamping and fastening the test sample; a sealing component arranged between the sealing cover 4 and the test box 3, for reducing the influence of leakage on the penetration test; and a plugging component arranged inside the sealing cover 4, for plugging the conduit 106.

[0057] Among them, through the setting of the clamping component, the film can be clamped and fixed, and the pressure ring 5 can be positioned at the same time. Then, the film can be straightened and flattened through the inclined moving path of the clamping plate 609 to ensure the accuracy of the detection; secondly, through the setting of the blocking component, the conduit 106 can be blocked when the sealing cover 4 is not completely covered, thereby avoiding the leakage of the permeate and affecting the data of the permeate sample, effectively reducing the loss of the sample and improving the accuracy of the sample detection. Then, through the setting of the sealing component, the occurrence of leakage during the permeation test can be reduced to ensure the normal progress of the permeation test. At the same time, the rubber pad 6012 and the sealing ring 401 can protect the pressure ring 5 and the placement ring 6 to reduce the damage caused by hard contact. Example 2

[0058] On the basis of Example 1, the clamping assembly includes: a placement groove 606 opened on the top of the placement ring 6; a plurality of sockets 601 opened on the upper surface of the placement ring 6, and the plurality of sockets 601 are evenly distributed in a circular array, and a plurality of plug blocks 501 matching the sockets 601 are connected to the bottom of the pressure ring 5; a movable groove 602 opened inside the placement ring 6 and communicating with the sockets 601; a movable plate 604 arranged inside the movable groove 602, a plurality of storage grooves 6061 communicating with the placement groove 606 are opened inside the placement ring 6, a clamping plate 609 is arranged in the storage groove 6061, a plurality of inclined grooves 607 are opened inside the placement ring 6, an inclined surface is arranged at the bottom end of the plug block 501, and the position of the plug block 501 corresponds to the position of the socket 601, and the positions of the plurality of storage grooves 6061, the socket 601 and the movable groove 602 correspond to each other.

[0059] Among them, a return spring 603 is connected to the movable groove 602, and one end of the return spring 603 is connected to the movable plate 604, one end of the movable plate 604 extends into the socket 601 and is provided with an inclined surface, a plurality of extrusion grooves 605 are opened on the top of the movable plate 604, a plurality of inclined rods 608 are connected to the bottom of the clamping plate 609, and the bottom end of the inclined rod 608 extends into the extrusion groove 605 through the inclined groove 607 and is provided with an inclined surface.

[0060] When clamping the film, the film to be clamped is placed in the placement groove 606, and then the pressure ring 5 is placed above the placement ring 6. At this time, the pressure ring 5 is positioned by the setting of the plug block 501 and the socket 601, and the pressure ring 5 is moved down to be close to the placement ring 6. At this time, the plug block 501 is inserted into the socket 601 under the action of the gravity of the pressure ring 5 itself, so that the inclined surface of the bottom end of the plug block 501 contacts the inclined surface of the moving plate 604, and the moving plate 604 is squeezed into the extrusion groove 605. At this time, the reset spring 603 is squeezed to accumulate elastic force, and the moving plate 604 pushes the inclined rod through the extrusion groove 605. 608 is lifted, so that the inclined rod 608 drives the clamping plate 609 to move upward, so that the clamping plate 609 presses the film toward the direction of the pressure ring 5, and completes the clamping and fixing of the film, preventing the film from falling off from the placement groove 606 during the penetration test, affecting the detection data of the penetration test, and at the same time, through the arrangement of the inclined rod 608 and the inclined groove 607, the clamping plate 609 moves outward during the upward movement, so that the multiple clamping plates 609 pull the test outward while clamping and fixing the sample, so as to straighten and flatten the test, and avoid the sample being uneven after being clamped, thereby affecting the detection accuracy of the penetration test;

[0061] When the pressure ring 5 is separated from the placement ring 6, the plug 501 is moved out of the socket 601. At this time, the movable plate 604 rebounds to its original position under the action of the elastic force of the reset spring 603, so that the extrusion groove 605 on the movable plate 604 moves to the bottom of the inclined rod 608. At this time, the inclined rod 608 falls into the extrusion groove 605 under the action of its own gravity and the gravity of the clamping plate 609, so that the clamping plate 609 enters the storage groove 6061. Example 3

[0062] On the basis of Example 1, the sealing assembly includes: two rubber blocks 304 connected to the top of the detection box 3, two sealing holes 6011 cooperating with the rubber blocks 304 are opened at the bottom of the placement ring 6; a rubber pad 6012 is arranged at the bottom of the placement ring 6, and an opening 6013 corresponding to the position of the sealing hole 6011 is opened on the rubber pad 6012; a sealing ring 401 is arranged on the inner wall of the bottom of the sealing cover 4; a sealing groove 305 is opened at the top of the detection box 3, a sealing ring 402 used in conjunction with the sealing groove 305 is connected to the bottom of the sealing cover 4, a conduit 106 is connected to the top of the sealing cover 4, and a blocking structure is provided between the conduit 106 and the sealing cover 4.

[0063] After the film is clamped and fixed, the placement ring 6 is placed in the detection box 3. During the placement of the placement ring 6, the placement position of the placement ring 6 is initially positioned by setting the two rubber blocks 304 and the sealing hole 6011 to ensure that the transmission block 704 on the placement ring 6 just slides into the positioning groove 306, and then the sealing cover 4 is threadedly connected to the detection box 3. When the sealing cover 4 is completely threadedly connected to the detection box 3, the sealing ring 401 under the sealing cover 4 just fits tightly against the upper surface of the pressure ring 5. At this time, the setting of the sealing ring 401 and the rubber pad 6012 can protect the pressure ring 5 and the placement ring 6, and avoid direct hard contact between the pressure ring 5 and the placement ring 6 and the detection box 3 and the sealing cover 4, resulting in damage to the surface of the pressure ring 5 and the placement ring 6, affecting their service life. At the same time, the sealing ring 401 can block the gap between the pressure ring 5 and the sealing cover 4, and the rubber pad 6012 can block the gap between the placement ring 6 and the detection box 3, thereby forming the first sealing defense line to reduce leakage during the penetration test.

[0064] Then, after the sealing cover 4 is completely covered on the detection box 3, the sealing ring 402 and the sealing groove 305 are arranged to block the gap between the sealing cover 4 and the detection box 3, forming a second sealing defense line, further ensuring the implementation of the penetration test. Example 4

[0065] On the basis of Example 1 and Example 3, the blocking component: a mounting block 403 connected to the bottom of the sealing cover 4, the cross-section of the mounting block 403 is a circular structure, the bottom end of the mounting block 403 extends into the pressure ring 5, and the cross-sectional contour of the mounting block 403 matches the cross-sectional size of the internal space of the pressure ring 5; a blocking groove 404 is opened inside the mounting block 403, and the blocking groove 404 is communicated with the conduit 106; a blocking plate 406 is arranged inside the blocking groove 404, and the cross-sectional area of ​​the blocking plate 406 is larger than the cross-sectional size of the conduit 106.

[0066] Among them, a transmission groove 407 is opened on one side of the mounting block 403, and a transmission rod 408 is arranged inside the transmission groove 407, one end of the transmission rod 408 protrudes from the outer surface of the mounting block 403 and is provided with an inclined surface, one end of the transmission rod 408 is connected with an ejection spring, one end of the ejection spring is connected to the transmission groove 407, and a transmission gear bar 405 is connected to the side of the blocking plate 406 away from the catheter 106. A connecting groove communicating with the transmission groove 407 and the blocking groove 404 is opened inside the mounting block 403, and a transmission gear 409 is rotatably connected inside the connecting groove through a bearing, and a matching tooth meshing with the transmission gear 409 is provided at the bottom of the transmission rod 408, and the transmission gear 409 is meshed and connected with the transmission gear bar 405.

[0067] When the sealing cover 4 is completely covered on the test box 3, the mounting block 3 is also extended into the pressure ring 5. The installation of the mounting block 3 can reduce the space capacity above the test sample, thereby avoiding that part of the permeate does not penetrate due to the large space above the sample after the test is completed, thereby increasing the error of the subsequent permeation data;

[0068] Then, when the mounting block 3 moves into the pressing ring 5, the inclined surface of the transmission rod 408 contacts the surface of the pressing ring 5 and is squeezed into the transmission groove 407. At this time, the transmission rod 408 drives the transmission gear 409 to rotate through the matching teeth, and the transmission gear 409 engages with the gear bar 405, thereby driving the blocking plate 406 to be retracted into the blocking groove 404, opening the conduit 106. After the sealing cover 4 is completely covered on the detection box 3, the position of the transmission rod 408 is just located in the pressing ring 5. When the sealing cover 4 is not completely covered and the penetration test is started, the conduit 106 can be effectively blocked to avoid leakage of the permeate and affect the test data of the sample, thereby playing a preventive role. Example 5

[0069] On the basis of Example 1, a baffle 101 is provided inside the box body 1, and a storage chamber 102 is provided on the side of the baffle 101 away from the detection box 3. An electric push rod 2 is connected to the top of the box body 1, and a piston 201 is connected to the bottom of the electric push rod 2. A sensing plate 104 is provided inside the storage chamber 102, and a pressure sensor a103 is installed at the bottom of the sensing plate 104. A pump a202 is installed on the top of the box body 1, a pump b301 is installed on one side of the detection box 3, a pressure plate 302 is provided inside the detection box 3, and a pressure sensor b303 is installed at the bottom of the pressure plate 302. A delivery pipe 105 is connected to one side of the baffle 101, and a solenoid valve is provided in the delivery pipe 105.

[0070] Among them, pressure sensor a103 and pressure sensor b303 are both piezoresistive pressure sensors, which contain a material (such as silicon or metal strain gauge) inside, whose resistance value changes with the pressure. When pressure acts on the sensor, the material will deform, causing the resistance value of its internal resistance network to change. The magnitude of the pressure can be determined by measuring the changes in these resistances.

[0071] After completing the installation of the sealing cover 4, the liquid medium for the test is injected into the storage chamber 102 through the pump a202. After the storage chamber 102 is completely filled with the liquid medium, the piston 201 is driven downward by the electric push rod 2 to squeeze the space in the storage chamber 102, so that the pressure in the storage chamber 102 rises, and the initial pressure in the storage chamber 102 is obtained through the pressure sensor a103. After the piston 201 moves down to the end of the stroke, the solenoid valve in the delivery pipe 105 is opened, so that the liquid medium in the storage chamber 102 enters the sealing cover 4 through the delivery pipe 105 and the conduit 106. At this time, a high-pressure area is formed above the film, and a low-pressure area is formed below the film. Then, the liquid medium passes through the film under the action of the osmotic pressure difference. This process may take some time to reach a stable state. After stabilization, the piston 201 is lifted, and the weight of the liquid medium in the storage chamber 102 and the detection box 3 is obtained through the pressure sensor a103 and the pressure sensor b303 to facilitate the subsequent calculation of the permeability of the film.

[0072] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0073] The sample clamping device and method for thin film penetration detection provided in the embodiments of the present application are introduced in detail above. The principles and implementation methods of the present application are explained in this article using specific examples. The description of the above embodiments is only used to help understand the technical solution and core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; 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 the present application.

Claims

1. A sample holding device for film penetration testing, characterized in that: include: A box body (1), wherein a plurality of detection boxes (3) are arranged inside the box body (1), a sealing cover (4) is threadedly connected to the top of the detection box (3), a conduit (106) is connected to the top of the sealing cover (4), a placement ring (6) is arranged inside the detection box (3), and a pressure ring (5) is arranged on the top of the placement ring (6); A clamping assembly disposed between the placement ring (6) and the pressure ring (5), used for clamping and fastening the test specimen; A sealing component disposed between the sealing cover (4) and the detection box (3) to reduce the impact of leakage on the penetration test; and A blocking component disposed inside the sealing cover (4), used for blocking the conduit (106); The clamping assembly comprises: A placement groove (606) formed on the top of the placement ring (6); A plurality of insertion holes (601) are provided on the upper surface of the placement ring (6), and the plurality of insertion holes (601) are evenly distributed in a ring array, and a plurality of insertion blocks (501) matching with the insertion holes (601) are connected to the bottom of the pressure ring (5); A movable groove (602) provided inside the placement ring (6) and communicating with the insertion hole (601); A movable plate (604) is arranged inside the movable groove (602); a plurality of receiving grooves (6061) communicating with the placing groove (606) are provided inside the placing ring (6); a clamping plate (609) is provided inside the receiving groove (6061); a plurality of inclined grooves (607) are provided inside the placing ring (6); an inclined surface is provided at the bottom end of the insert block (501); the position of the insert block (501) corresponds to that of the plug hole (601); the position of the plurality of receiving grooves (6061), the plug hole (601) and the movable groove (602) corresponds to that of the movable groove (602); A return spring (603) is connected to the movable groove (602), and one end of the return spring (603) is connected to the movable plate (604), one end of the movable plate (604) extends into the insertion hole (601) and is provided with an inclined surface, a plurality of extrusion grooves (605) are provided on the top of the movable plate (604), a plurality of inclined rods (608) are connected to the bottom of the clamping plate (609), and the bottom ends of the inclined rods (608) extend into the extrusion groove (605) through the inclined groove (607) and are provided with an inclined surface.

2. The sample clamping device for film penetration testing according to claim 1, characterized in that: The sealing assembly comprises: Two rubber blocks (304) connected to the top of the detection box (3), and two sealing holes (6011) matching with the rubber blocks (304) are opened at the bottom of the placement ring (6); A rubber pad (6012) disposed at the bottom of the placement ring (6), the rubber pad (6012) being provided with an opening (6013) corresponding to the position of the sealing hole (6011); A sealing ring (401) provided on the inner wall of the bottom of the sealing cover (4); A sealing groove (305) is provided at the top of the detection box (3), a sealing ring (402) used in conjunction with the sealing groove (305) is connected to the bottom of the sealing cover (4), and a conduit (106) is connected to the top of the sealing cover (4).

3. The sample clamping device for film penetration testing according to claim 1, characterized in that: The blocking component: a mounting block (403) connected to the bottom of the sealing cover (4), the mounting block (403) having a circular cross-section, the bottom end of the mounting block (403) extending into the pressure ring (5), and the cross-sectional profile of the mounting block (403) matching the cross-sectional size of the internal space of the pressure ring (5); A blocking groove (404) is provided inside the mounting block (403), and the blocking groove (404) is communicated with the conduit (106); A blocking plate (406) is disposed inside the blocking groove (404), and the cross-sectional area of ​​the blocking plate (406) is larger than the cross-sectional area of ​​the conduit (106).

4. The sample holding device for film penetration testing according to claim 3, characterized in that: A transmission groove (407) is provided on one side of the mounting block (403), and a transmission rod (408) is provided inside the transmission groove (407), one end of the transmission rod (408) protrudes from the outer surface of the mounting block (403) and is provided with an inclined surface, one end of the transmission rod (408) is connected to an ejection spring, and one end of the ejection spring is connected to the transmission groove (407).

5. The sample clamping device for film penetration testing according to claim 4, characterized in that: A transmission gear bar (405) is connected to the side of the blocking plate (406) away from the conduit (106); a connecting groove communicating with the transmission groove (407) and the blocking groove (404) is provided inside the mounting block (403); a transmission gear (409) is rotatably connected inside the connecting groove via a bearing; matching teeth meshing with the transmission gear (409) are provided at the bottom of the transmission rod (408); and the transmission gear (409) is meshingly connected to the transmission gear bar (405).

6. The sample clamping device for film penetration testing according to claim 1, characterized in that: A baffle (101) is provided inside the box body (1), and a storage chamber (102) is provided on a side of the baffle (101) away from the detection box (3). An electric push rod (2) is connected to the top of the box body (1), and a piston (201) is connected to the bottom of the electric push rod (2). A sensing plate (104) is provided inside the storage chamber (102), and a pressure sensor a (103) is installed at the bottom of the sensing plate (104). A pump a (202) is installed on the top of the box body (1), and a pump b (301) is installed on one side of the detection box (3). A pressure plate (302) is provided inside the detection box (3), and a pressure sensor b (303) is installed at the bottom of the pressure plate (302). A delivery pipe (105) is connected to one side of the baffle (101), and a solenoid valve is provided inside the delivery pipe (105).

7. The method of the sample clamping device for film penetration testing according to any one of claims 1 to 6, characterized in that: The steps include: S1. Fix the film sample, place the film sample in the placement groove, and then cover the placement ring with a pressure ring. At this time, the placement ring and the pressure ring can be positioned by setting the jack and the plug block. At the same time, the sample is fixed between the placement ring and the pressure ring by setting the clamping plate, the inclined rod and the moving plate. At the same time, the sample is pulled outward to ensure the flatness and straightness of the test; S2, placing the placement ring and the pressure ring into the detection box, and then fixing the sealing cover to the detection box through threads. At this time, the gap between the sealing cover and the detection box can be sealed by setting the sealing ring and the sealing groove; S3. Through the setting of the rubber pad and the sealing ring, the placement ring and the pressure ring can be clamped and fixed to prevent the pressure ring and the placement ring from positional displacement, and to avoid the placement ring and the pressure ring from hard collision with the sealing cover and the detection box. At the same time, through the setting of the positioning groove and the transmission block, the placement ring can be positioned; S4. After the sealing cover is threadedly connected to the detection box, the mounting block extends into the pressure ring, and the blocking plate is moved away from the conduit through the transmission rod, transmission gear and transmission gear bar, thereby opening the conduit; S5. After the sample is clamped, fixed and placed, a penetration test is performed. The liquid medium is pumped into the storage chamber by pump a and filled up before storage. At this time, the weight of the liquid medium is recorded by pressure sensor a. S6. Create an osmotic pressure difference. When conducting the test, the electric push rod drives the piston downward, so that the liquid medium in the storage chamber is pressed into the delivery tube and enters the sealing cover through the catheter. At this time, as the piston moves, the pressure in the storage chamber gradually rises, so that a pressure difference is generated on both sides of the film, forming an osmotic driving force; S7. After waiting for a certain period of time, the piston is lifted. At this time, the weight of the liquid medium in the storage chamber is recorded again through the pressure sensor a, and the weight of the liquid medium infiltrated in the detection box is recorded through the pressure sensor b to facilitate the subsequent calculation of the permeability of the film.

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