A device for detecting water absorption capacity of a high molecular water-absorbing resin

Abstract

The application discloses a kind of high polymer water-absorbing resin water-absorbing capacity detection device, it is related to water-absorbing capacity detection technical field, including base, placing groove, water storage bucket, net bag, positioning mechanism and clamping mechanism.The application is provided with positioning mechanism and clamping mechanism, when detecting, water-absorbing resin is placed into net bag, and the open end of net bag is directly clamped in the bottom end of connecting rod using clamping mechanism, without manually sealing, saving repeated sealing and unpacking steps, improve detection efficiency.Net bag keeps open state, avoid the wrapping pressure generated by closing structure, ensure that water-absorbing resin fully free expansion, truly reflect water-absorbing capacity, eliminate the detection error caused by sealing pressure, improve result accuracy.At the same time, the device is in contact with the inner wall of connecting groove through extrusion plate, automatically triggers locking mechanism to fix clamping assembly, prevent net bag from loosening and falling off during detection, convenient operation, high degree of automation.

Description

Technical Field

[0001] This invention relates to the field of water absorption capacity testing technology, specifically a device for testing the water absorption capacity of superabsorbent polymers. Background Technology

[0002] Superabsorbent polymer (SAP) is a typical functional polymer material composed of low-crosslinked polymer compounds containing strongly hydrophilic groups. It can absorb hundreds to thousands of times its own weight in water, exhibiting superior water retention properties. Its chemical structure achieves osmotic pressure absorption through a three-dimensional network, making it widely used in hygiene products such as diapers and sanitary napkins, and extending into fields such as drought resistance and water conservation in agriculture and forestry, medical care, and desertification control.

[0003] The water absorption capacity of superabsorbent polymers (SAPs) is mainly tested through core indicators such as absorbency ratio, absorption rate, and water retention performance, with absorbency ratio being the most critical evaluation parameter. Currently, the testing methods for absorbency ratio vary depending on the application scenario and accuracy requirements, and typically include natural filtration, gravity, centrifugation, and standardized testing methods. According to Appendix H of GB / T 22875-2018 "Superabsorbent Resins for Diapers and Sanitary Napkins," both absorbency and water retention are determined using the "tea bag method." In routine testing, a certain amount of absorbent resin is typically placed into a mesh bag made of porous nonwoven fabric (referred to as a tea bag in the standard). The mesh bag is then immersed in a 0.9% sodium chloride solution for a certain period to allow the resin to fully absorb water. The mesh bag is then removed and hung to drain. Finally, the difference in mass before and after water absorption is calculated by weighing, thus determining the absorbency ratio.

[0004] However, existing testing methods have significant shortcomings in practical operation. First, to prevent the absorbent resin from leaking out of the mesh bag during soaking, testers usually need to manually tie or seal the bag. After soaking and before weighing, the seal needs to be broken to remove the absorbent resin for weighing. This sealing and unsealing process is cumbersome, time-consuming, and labor-intensive, especially when multiple samples need to be tested in batches, severely impacting testing efficiency.

[0005] Secondly, and more importantly, the sealed mesh bag exerts a certain amount of enveloping pressure on the internal material. During the process of the superabsorbent polymer (SAP) absorbing water and expanding, this external pressure physically hinders the expansion of the resin, preventing it from expanding fully and thus affecting the accurate measurement of its water absorption capacity. In other words, the existing sealing process not only increases the number of steps but may also introduce human error, making the test results unable to accurately reflect the actual water absorption performance of the superabsorbent polymer.

[0006] Therefore, how to design a detection device that can avoid sealing the mesh bag while reliably positioning the absorbent resin in the detection device and ensuring that it is not disturbed by additional pressure during the water absorption process has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0007] The purpose of this invention is to provide a device for testing the water absorption capacity of superabsorbent polymers in order to facilitate the testing of the water absorption capacity of superabsorbent polymers.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a device for testing the water absorption capacity of a superabsorbent polymer, comprising a base, a placement groove at the top of the base, a water storage tank slidably connected to the inner wall of the placement groove, a square mesh bag above the water storage tank, the mesh bag being positioned by a positioning mechanism, the positioning mechanism including a support frame, the support frame being fixedly connected to the top of the base and located above the placement groove, a connecting groove at the outer wall of the support frame, a connecting rod slidably connected to the inner wall of the connecting groove, a horizontal plate symmetrically fixedly connected to the inner wall of the connecting groove, a horizontal groove symmetrically opened on the outer wall of the connecting rod, a limiting plate symmetrically fixedly connected to the outer wall of the connecting rod, the limiting plate being located below the horizontal groove, a locking block extending into the inner cavity of the connecting groove being slidably connected inside the support frame, a first spring connecting the locking block and the support frame, and the mesh bag being positioned at the bottom end of the connecting rod by a clamping mechanism.

[0009] As a further embodiment of the present invention: the positioning mechanism further includes a fixing plate, the fixing plate being fixedly connected to the outer wall of the support frame, a first threaded rod being rotatably connected to the top of the fixing plate, a rotating column being fixedly connected to the top of the first threaded rod, a movable frame being slidably connected to the outer wall of the first threaded rod, a vertical rod being fixedly connected to the bottom of the movable frame, a positioning rod being fixedly connected to the outer wall of the vertical rod, and a slanted groove being formed at the top of the locking block, and a positioning groove being formed at the bottom of the slanted groove.

[0010] As a further embodiment of the present invention: the clamping mechanism includes a mounting base, the mounting base being fixedly connected to the bottom end of the connecting rod, a clamping plate being fixedly connected to the bottom end of the mounting base, an L-shaped plate extending out of the mounting base being slidably connected inside the mounting base, staggered protrusions being fixedly connected to the outer walls of the clamping plate and the L-shaped plate, a rotating block being rotatably connected to the top end of the connecting rod, a connecting shaft being fixedly connected to the bottom end of the rotating block, a second bevel gear being fixedly connected to the bottom end of the connecting shaft, a first bevel gear being rotatably connected to the inner side of the connecting rod located on the outer wall of the second bevel gear, a second threaded rod being fixedly connected to one end of the first bevel gear, and the second threaded rod extending into the inner side of the L-shaped plate.

[0011] As a further embodiment of the present invention: the clamping mechanism further includes a rotating disk, the rotating disk being fixedly connected to the outer wall of the connecting shaft, a pressing plate extending from the connecting rod being slidably connected inside the connecting rod, a second spring being connected between the pressing plate and the connecting rod, and a toothed block being fixedly connected to the outer wall of the pressing plate.

[0012] As a further embodiment of the present invention: the outer wall of the connecting rod is fitted with the inner wall of the connecting groove, and the inner wall of the transverse groove is fitted with the outer wall of the transverse plate.

[0013] As a further embodiment of the present invention: the outer wall of the connecting rod is symmetrically provided with ratchet teeth, and one end of the locking block engages with the ratchet teeth.

[0014] As a further embodiment of the present invention: the outer wall of the movable frame is provided with a first threaded hole, the first threaded hole is matched with the first threaded rod, and the outer wall of the positioning rod is in contact with the inner wall of the positioning groove.

[0015] As a further embodiment of the present invention: the first bevel gear meshes with the second bevel gear.

[0016] As a further embodiment of the present invention: the outer wall of the L-shaped plate is provided with a second threaded hole, which matches the second threaded rod.

[0017] As a further embodiment of the present invention: the outer wall of the rotating disk is provided with a slot, and one end of the toothed block engages with the slot.

[0018] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention, by incorporating a positioning mechanism and a clamping mechanism, allows for the placement of absorbent resin into a mesh bag before testing. The clamping mechanism then directly positions the open end of the mesh bag against the bottom of the connecting rod, eliminating the need for manual tying or sealing. After soaking, the mesh bag can be removed from the connecting rod for weighing without unsealing. The entire testing process eliminates the tedious steps of repeated sealing and unsealing, significantly improving testing efficiency, and is particularly suitable for rapid testing of batch samples.

[0019] 2. This invention uses a clamping plate and an L-shaped plate to hold and position the opening edge of the mesh bag, keeping the inside of the bag open without a separate closing structure. Compared to existing technologies that use tying or sealing methods to gather the mesh bag, this invention avoids the enveloping pressure exerted by the mesh bag on the internal absorbent resin. During the water absorption and expansion process of the absorbent resin, the inner wall of the mesh bag does not exert additional physical resistance on the resin, thus ensuring that the resin can expand fully and freely, accurately reflecting its water absorption capacity. This effectively eliminates detection errors caused by sealing pressure and improves the accuracy and reliability of the detection results.

[0020] 3. After the connecting rod enters the connecting groove, the contact between the extrusion plate and the inner wall of the connecting groove automatically triggers the toothed block to engage with the rotating disk, locking and fixing the clamping mechanism to prevent the net bag from loosening and falling off during the testing process. Simultaneously, the one-way engagement of the locking block with the ratchet teeth on the outer wall of the connecting rod ensures that the connecting rod can only move upwards and cannot fall down on its own, ensuring that the net bag maintains a stable immersion depth during soaking. The above-mentioned linkage locking structure is ingeniously designed and easy to operate, requiring no additional manual locking steps, thus improving the automation level and reliability of the device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the placement groove of the present invention; Figure 3 This is a schematic diagram of the installation of the connecting rod of the present invention; Figure 4 This is a schematic diagram of the internal structure of the support frame of the present invention; Figure 5 This is a schematic diagram of the installation of the first threaded rod of the present invention; Figure 6 This is a schematic diagram of the structure of the movable frame of the present invention; Figure 7 This is a schematic diagram of the installation of the mounting base of the present invention; Figure 8 This is a schematic diagram of the internal structure of the connecting rod of the present invention; Figure 9 For the present invention Figure 8 Enlarged view of point A in the middle; Figure 10 This is a schematic diagram of the installation of the extrusion plate of the present invention; Figure 11 For the present invention Figure 10 Enlarged view of point B in the middle.

[0022] In the diagram: 1. Base; 2. Placement slot; 3. Water storage tank; 4. Mesh bag; 5. Positioning mechanism; 501. Support frame; 502. Connecting slot; 503. Connecting rod; 504. Horizontal plate; 505. Horizontal groove; 506. Limiting plate; 507. Locking block; 508. First spring; 509. Fixing plate; 510. Rotating column; 511. First threaded rod; 512. Movable frame; 513. Vertical rod; 514. Positioning rod; 515. Inclined groove; 516. Positioning groove; 6. Clamping mechanism; 601. Mounting base; 602. Clamping plate; 603. Protrusion; 604. L-shaped plate; 605. Second threaded rod; 606. First bevel gear; 607. Second bevel gear; 608. Connecting shaft; 609. Rotating block; 610. Rotating disk; 611. Extrusion plate; 612. Second spring; 613. Tooth block. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings and are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0025] Please see Figures 1 to 11In this embodiment of the invention, a device for testing the water absorption capacity of a superabsorbent polymer includes a base 1. A placement groove 2 is formed at the top of the base 1. A water storage tank 3 is slidably connected to the inner wall of the placement groove 2. A square mesh bag 4 is placed above the water storage tank 3. The mesh bag 4 is positioned by a positioning mechanism 5. The positioning mechanism 5 includes a support frame 501, which is fixedly connected to the top of the base 1 and located above the placement groove 2. A connecting groove 502 is formed on the outer wall of the support frame 501. A connecting rod 503 is slidably connected to the inner wall of the connecting groove 502. A horizontal plate 504 is symmetrically fixedly connected to the inner wall of the connecting groove 502. A horizontal groove 505 is symmetrically formed on the outer wall of the connecting rod 503. A limiting plate 506 is symmetrically fixedly connected to the outer wall of the connecting rod 503, and the limiting plate 506 is located below the horizontal groove 505. The support frame 501 has a sliding connection to a locking block 507 extending into the inner cavity of the connecting groove 502. A first spring 508 is connected between the locking block 507 and the support frame 501. The mesh bag 4 is positioned at the bottom end of the connecting rod 503 by the clamping mechanism 6. The positioning mechanism 5 also includes a fixing plate 509, which is fixedly connected to the outer wall of the support frame 501. A first threaded rod 511 is rotatably connected to the top of the fixing plate 509. A rotating column 510 is fixedly connected to the top of the first threaded rod 511. A movable frame 512 is slidably connected to the outer wall of the first threaded rod 511. A vertical rod 513 is fixedly connected to the bottom end of the movable frame 512. A positioning rod 514 is fixedly connected to the outer wall of the vertical rod 513. A sloping groove 515 is opened at the top of the locking block 507, and a positioning groove 516 is opened at the bottom end of the sloping groove 515.

[0026] In this embodiment: water-absorbing resin is placed in a mesh bag 4 made of porous non-woven fabric (the amount of water-absorbing resin is less than 1 / 2 of the capacity of the mesh bag 4, giving the water-absorbing resin sufficient expansion space), water is poured into a water storage tank 3, and the water storage tank 3 is placed in the placement groove 2. The mesh bag 4 is positioned at the bottom end of the connecting rod 503 by the internal structure of the clamping mechanism 6. At this time, the locking block 507 is located in the support frame 501, and the first spring 508 is in a compressed state. The connecting rod 503 is moved horizontally into the connecting groove 502, and the horizontal plate 504 slides in the horizontal groove 505 until the horizontal plate 504 slides out of the horizontal groove 505. Then the connecting rod 503 is slid down, so that the horizontal groove 505 is separated from the horizontal plate 504, and the horizontal plate 504 contacts the outer wall of the connecting rod 503. The connecting rod 503 can only slide up and down in the connecting groove 502.

[0027] The connecting rod 503 is pushed to move, and the displacement of the connecting rod 503 causes the mesh bag 4 to enter the water storage tank 3. The position of the mesh bag 4 is adjusted to prevent the water level from being higher than the height of the mesh bag 4, which would cause the absorbent resin inside the mesh bag 4 to leak out. At this time, the water passes through the mesh bag 4 and comes into contact with the absorbent resin. Then, the rotating column 510 is rotated, which drives the first threaded rod 511 to rotate. The rotation of the first threaded rod 511 drives the movable frame 512 to move. The displacement of the movable frame 512 drives the vertical rod 513 and the positioning rod 514 to move upward. At this time, the locking block 507 is displaced by the elastic force of the first spring 508. The displacement of the locking block 507 engages with the outer wall of the connecting rod 503 to prevent the connecting rod 503 from moving downward, so that the connecting rod 503 can only move upward.

[0028] After soaking for a certain period of time, rotating the rotating column 510 causes the movable frame 512 to move downwards. The movement of the movable frame 512 causes the positioning rod 514 to move downwards. The positioning rod 514 moves downwards and pushes the locking block 507 through the inclined groove 515. The locking block 507 separates from the connecting rod 503 until the positioning rod 514 engages in the positioning groove 516, thus fixing the locking block 507. Pushing the connecting rod 503 upwards causes the net bag 4 to move out of the water storage tank 3. After the net bag 4 has drained naturally, continue to push the connecting rod 503 upwards until the limiting plate 506 contacts the support frame 501. At this time, the horizontal plate 504 aligns with the horizontal groove 505, and the connecting rod 503 can be pushed laterally out of the connecting groove 502. Through the cooperation of the parts in the clamping mechanism 6, the net bag 4 is removed from the bottom of the connecting rod 503, so that the water-absorbing resin in the net bag 4 can be weighed. The device is designed to facilitate the testing of the water absorption capacity of superabsorbent polymers without requiring the sealing and unsealing of the mesh bag 4.

[0029] Please refer to this carefully. Figures 7 to 11The clamping mechanism 6 includes a mounting base 601, which is fixedly connected to the bottom end of the connecting rod 503. A clamping plate 602 is fixedly connected to the bottom end of the mounting base 601. An L-shaped plate 604 extending from the mounting base 601 is slidably connected inside the mounting base 601. Alternating protrusions 603 are fixedly connected to the outer walls of the clamping plate 602 and the L-shaped plate 604. A rotating block 609 is rotatably connected to the top end of the connecting rod 503. A connecting shaft 608 is fixedly connected to the bottom end of the rotating block 609. A second bevel gear 607 is fixedly connected to the bottom end of the connecting shaft 608. Inside the 3, the first bevel gear 606 is rotatably connected to the outer wall of the second bevel gear 607. One end of the first bevel gear 606 is fixedly connected to the second threaded rod 605, which extends into the interior of the L-shaped plate 604. The clamping mechanism 6 also includes a rotating disk 610, which is fixedly connected to the outer wall of the connecting shaft 608. Inside the connecting rod 503, a pressing plate 611 extending out of the connecting rod 503 is slidably connected. A second spring 612 is connected between the pressing plate 611 and the connecting rod 503. A toothed block 613 is fixedly connected to the outer wall of the pressing plate 611.

[0030] In this embodiment: when positioning the mesh bag 4, the four top edges of the mesh bag 4 are placed between the four sets of clamping plates 602 and the L-shaped plate 604. Rotating the rotating block 609 causes the connecting shaft 608 to rotate, which in turn causes the second bevel gear 607 to rotate. The second bevel gear 607 then causes the first bevel gear 606 to rotate, which in turn causes the second threaded rod 605 to rotate. The second threaded rod 605 then causes the L-shaped plate 604 to shift closer to the clamping plate 602, thus clamping the mesh bag 4. The protrusion 603 is used to improve the clamping firmness (the protrusion 603 can also be replaced with a ratchet tooth with its tip pointing upwards). (The clamping plate 602 and the L-shaped plate 604 are fixedly connected to each other on the outer wall and are staggered.) When the connecting rod 503 is connected into the inner wall of the connecting groove 502, the displacement of the connecting rod 503 causes the extrusion plate 611 to contact the inner wall of the connecting groove 502, thereby pushing the extrusion plate 611 to move relative to the connecting rod 503. The displacement of the extrusion plate 611 causes the second spring 612 to be squeezed. The displacement of the extrusion plate 611 drives the toothed block 613 to move. One end of the toothed block 613 engages with the rotating disk 610, thereby fixing the rotating disk 610. The fixing of the rotating disk 610 fixes the connecting shaft 608, and then fixes the position of the L-shaped plate 604 to prevent the clamping of the mesh bag 4 from loosening during the test.

[0031] Please refer to this carefully. Figures 1 to 6 The outer wall of the connecting rod 503 is in contact with the inner wall of the connecting groove 502, and the inner wall of the transverse groove 505 is in contact with the outer wall of the transverse plate 504.

[0032] In this embodiment: the connecting rod 503 is moved into the connecting groove 502, and the horizontal plate 504 slides in the horizontal groove 505 until the horizontal plate 504 slides out of the horizontal groove 505. Then the connecting rod 503 is slid down, so that the horizontal groove 505 is separated from the horizontal plate 504, and the horizontal plate 504 contacts the outer wall of the connecting rod 503. The connecting rod 503 can only slide up and down in the connecting groove 502.

[0033] Please refer to this carefully. Figures 1 to 6 The outer wall of the connecting rod 503 is symmetrically provided with ratchet teeth, and one end of the locking block 507 engages with the ratchet teeth.

[0034] In this embodiment: the locking block 507 is displaced by the elastic force of the first spring 508, and the displacement of the locking block 507 engages with the outer wall of the connecting rod 503, preventing the connecting rod 503 from moving downward, so that the connecting rod 503 can only move upward; rotating the rotating column 510 drives the movable frame 512 to move downward, and the displacement of the movable frame 512 drives the positioning rod 514 to move downward, and the displacement of the positioning rod 514 pushes the locking block 507 to move through the inclined groove 515, and the locking block 507 separates from the connecting rod 503 until the positioning rod 514 engages into the positioning groove 516, and the locking block 507 is fixed.

[0035] Please refer to this carefully. Figures 1 to 6 The outer wall of the movable frame 512 is provided with a first threaded hole, which matches the first threaded rod 511. The outer wall of the positioning rod 514 fits against the inner wall of the positioning groove 516.

[0036] In this embodiment: rotating the rotating column 510 causes the first threaded rod 511 to rotate, the rotation of the first threaded rod 511 causes the movable frame 512 to move, and the movement of the movable frame 512 causes the vertical rod 513 and the positioning rod 514 to move.

[0037] Please refer to this carefully. Figures 7 to 11 The first bevel gear 606 meshes with the second bevel gear 607.

[0038] In this embodiment: rotating the rotating block 609 causes the connecting shaft 608 to rotate, which in turn causes the second bevel gear 607 to rotate, and the second bevel gear 607 in turn causes the first bevel gear 606 to rotate.

[0039] Please refer to this carefully. Figures 7 to 11 The outer wall of the L-shaped plate 604 is provided with a second threaded hole, which matches the second threaded rod 605.

[0040] In this embodiment: the first bevel gear 606 rotates to drive the second threaded rod 605 to rotate, the second threaded rod 605 rotates to drive the L-shaped plate 604 to move, the L-shaped plate 604 moves closer to the clamping plate 602 to clamp the mesh bag 4.

[0041] Please refer to this carefully. Figures 7 to 11 The outer wall of the rotating disk 610 is provided with a slot, and one end of the toothed block 613 engages with the slot.

[0042] In this embodiment: when the connecting rod 503 is connected into the inner wall of the connecting groove 502, the displacement of the connecting rod 503 causes the extrusion plate 611 to contact the inner wall of the connecting groove 502. Then the connecting rod 503 continues to move, thereby pushing the extrusion plate 611 to move relative to the connecting rod 503. The displacement of the extrusion plate 611 causes the second spring 612 to be squeezed. The displacement of the extrusion plate 611 drives the tooth block 613 to move. One end of the tooth block 613 engages with the rotating disk 610, thereby fixing the rotating disk 610.

[0043] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A device for testing the water absorption capacity of a superabsorbent polymer, characterized in that, The system includes a base (1), with a placement groove (2) at its top. A water storage tank (3) is slidably connected to the inner wall of the placement groove (2). A square mesh bag (4) is placed above the water storage tank (3). The mesh bag (4) is positioned by a positioning mechanism (5). The positioning mechanism (5) includes a support frame (501), which is fixedly connected to the top of the base (1) and located above the placement groove (2). A connecting groove (502) is provided on the outer wall of the support frame (501), and a connecting rod (503) is slidably connected to the inner wall of the connecting groove (502). A horizontal plate (504) is symmetrically fixedly connected to the inner wall of the groove (502). A horizontal groove (505) is symmetrically opened on the outer wall of the connecting rod (503). A limiting plate (506) is symmetrically fixedly connected to the outer wall of the connecting rod (503). The limiting plate (506) is located below the horizontal groove (505). A locking block (507) extending into the inner cavity of the connecting groove (502) is slidably connected inside the support frame (501). A first spring (508) is connected between the locking block (507) and the support frame (501). The mesh bag (4) is positioned at the bottom end of the connecting rod (503) by a clamping mechanism (6).

2. The device for detecting the water absorption capacity of a superabsorbent polymer according to claim 1, characterized in that, The positioning mechanism (5) further includes a fixing plate (509), which is fixedly connected to the outer wall of the support frame (501). The top end of the fixing plate (509) is rotatably connected to a first threaded rod (511), and the top end of the first threaded rod (511) is fixedly connected to a rotating column (510). The outer wall of the first threaded rod (511) is slidably connected to a movable frame (512), and the bottom end of the movable frame (512) is fixedly connected to a vertical rod (513). The outer wall of the vertical rod (513) is fixedly connected to a positioning rod (514). The top end of the locking block (507) is provided with an inclined groove (515), and the bottom end of the inclined groove (515) is provided with a positioning groove (516).

3. The device for detecting the water absorption capacity of a superabsorbent polymer according to claim 2, characterized in that, The clamping mechanism (6) includes a mounting base (601), which is fixedly connected to the bottom end of the connecting rod (503). A clamping plate (602) is fixedly connected to the bottom end of the mounting base (601). An L-shaped plate (604) extending from the mounting base (601) is slidably connected inside the mounting base (601). The outer walls of the clamping plate (602) and the L-shaped plate (604) are fixedly connected with staggered protrusions (603). The top end of the connecting rod (503) rotates. A rotating block (609) is connected, and a connecting shaft (608) is fixedly connected to the bottom end of the rotating block (609). A second bevel gear (607) is fixedly connected to the bottom end of the connecting shaft (608). A first bevel gear (606) is rotatably connected to the inner side of the connecting rod (503) located on the outer wall of the second bevel gear (607). A second threaded rod (605) is fixedly connected to one end of the first bevel gear (606). The second threaded rod (605) extends into the interior of the L-shaped plate (604).

4. The device for detecting the water absorption capacity of a superabsorbent polymer according to claim 3, characterized in that, The clamping mechanism (6) also includes a rotating disk (610), which is fixedly connected to the outer wall of the connecting shaft (608). The connecting rod (503) is slidably connected to a pressing plate (611) extending out of the connecting rod (503). A second spring (612) is connected between the pressing plate (611) and the connecting rod (503). A toothed block (613) is fixedly connected to the outer wall of the pressing plate (611).

5. The device for testing the water absorption capacity of a superabsorbent polymer according to claim 2, characterized in that, The outer wall of the connecting rod (503) is in contact with the inner wall of the connecting groove (502), and the inner wall of the transverse groove (505) is in contact with the outer wall of the transverse plate (504).

6. The device for detecting the water absorption capacity of a superabsorbent polymer according to claim 2, characterized in that, The outer wall of the connecting rod (503) is symmetrically provided with ratchet teeth, and one end of the locking block (507) engages with the ratchet teeth.

7. The device for detecting the water absorption capacity of a superabsorbent polymer according to claim 2, characterized in that, The outer wall of the movable frame (512) is provided with a first threaded hole, which matches the first threaded rod (511). The outer wall of the positioning rod (514) is in contact with the inner wall of the positioning groove (516).

8. The device for testing the water absorption capacity of a superabsorbent polymer according to claim 4, characterized in that, The first bevel gear (606) meshes with the second bevel gear (607).

9. The device for testing the water absorption capacity of a superabsorbent polymer according to claim 4, characterized in that, The outer wall of the L-shaped plate (604) is provided with a second threaded hole, which is matched with the second threaded rod (605).

10. The device for detecting the water absorption capacity of a superabsorbent polymer according to claim 4, characterized in that, The outer wall of the rotating disk (610) is provided with a slot, and one end of the toothed block (613) engages with the slot.

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