A device and method for detecting water absorption performance of water-resistant gypsum board

Abstract

The application discloses a kind of water-resistant gypsum board water absorption performance comparison detection device and method, wherein device has shrinkage forming cabin, shift drive structure, extrusion forming mechanism, liquid feeding mechanism and water penetration detection module, liquid feeding mechanism is dropped quantitative fresh water to the center position of material cake sample;Water penetration detection module periodically obtains the liquid level image of water drop on material cake sample, to analyze the water absorption performance of material cake sample.The application obtains the liquid level image of water drop on material cake sample at each detection time point, coincides the liquid level image of different kinds of material cake sample in the same coordinate graph, compares the highest point of liquid level of two groups of material cake sample at each detection time point, to compare the water absorption performance of two groups of material cake sample strong and weak;Extrusion forming, drop liquid drop and liquid drop penetration detection work are carried out in turn, multiple steps are concentrated in the same position, reduce operation steps, and automatically complete liquid drop penetration detection, improve detection efficiency and detection accuracy.

Description

Technical Field

[0001] This invention relates to the field of gypsum board water absorption performance testing technology, specifically to a device and method for comparative testing of water absorption performance of water-resistant gypsum board. Background Technology

[0002] In the production of water-resistant paper-faced gypsum board, various factors such as changes in the pH value of the gypsum slurry can affect the production process. Sometimes, the water absorption rate may not meet the standards when the original formula is followed. Therefore, it is usually necessary to test the water absorption performance during the gypsum board production process to avoid substandard gypsum board quality due to improper formula.

[0003] The current method for testing the water absorption performance of gypsum board typically involves taking a fixed amount of slurry from the gypsum board production line, extruding it into a sample cake, dripping water onto the sample cake, and observing the water penetration time to determine whether the water absorption performance of the sample cake meets the standard. The current water absorption performance testing method separates the extrusion process and the water dripping process, and the steps are scattered. It is necessary to manually move or change the operating position of different processes to ensure that the extrusion and water dripping processes are carried out in an orderly manner, and then manually observe the water penetration.

[0004] In practical applications, the water absorption performance of multiple gypsum boards is judged by manually observing and comparing the time it takes for water to fully penetrate each gypsum board. However, for gypsum boards with similar penetration times, it is impossible to accurately determine the water absorption performance of the gypsum boards.

[0005] In summary, existing water absorption performance testing technologies rely on human judgment, leading to inaccurate test results and failing to qualitatively reflect the strength of water absorption performance. Summary of the Invention

[0006] To address this issue, the present invention provides a device and method for comparing and testing the water absorption performance of water-resistant gypsum board, which effectively solves the problem in the prior art where inaccurate test results are caused by human judgment and the water absorption performance cannot be qualitatively reflected.

[0007] To solve the above-mentioned technical problems, the present invention specifically provides the following technical solution: a device for comparing and testing the water absorption performance of water-resistant gypsum board, comprising:

[0008] Multiple shrink molding chambers are provided and arranged side by side. The shrink molding chambers are used to provide a space for molding slurry to form a cake sample. The shrink molding chambers can shrink so that the formed cake sample can be removed from the interior of the shrink molding chamber.

[0009] A displacement driving structure is provided, wherein the shrink molding chamber is mounted on the displacement driving structure, and the displacement driving structure is used to drive the shrink molding chamber to be transported sequentially to the area directly below the slurry feeding point;

[0010] The extrusion molding mechanism, wherein the displacement driving structure drives the shrink molding chamber to move to a position corresponding to the extrusion molding mechanism, and the extrusion molding mechanism extrudes the slurry in the shrink molding chamber to form the slurry sample;

[0011] The liquid feeding mechanism is correspondingly arranged above the shrink molding chamber. The liquid feeding mechanism can pass through the extrusion molding mechanism to the top of the cake sample and drip a certain amount of clean water onto the center position of the cake sample.

[0012] A water seepage detection module is installed inside the liquid feeding end of the liquid feeding mechanism. The water seepage detection module is used to periodically acquire images of the liquid surface of water droplets on the cake sample in order to analyze the water absorption performance of the cake sample.

[0013] Furthermore, the shrink-molded chamber is formed by sequentially connected molding walls;

[0014] A translation platform is provided at the bottom of the forming wall, and a connecting cylinder is provided inside the translation platform. The forming wall is connected to the output end of the connecting cylinder.

[0015] Furthermore, the extrusion molding mechanism includes a mounting top platform disposed above the translation stage, an extrusion cylinder disposed on the mounting top platform, and an extrusion plate connected to the output end of the extrusion cylinder;

[0016] The extrusion plate fits into the inner wall of the shrink-molded chamber, and the mounting platform is fixed.

[0017] Furthermore, the displacement drive structure includes a drive cabin disposed on the side of the translation stage, a translation groove disposed on the inner wall of the drive cabin, and a drive shaft column fixedly disposed at the end of the translation stage;

[0018] The end of the drive shaft is slidably disposed in the translation groove. A transmission worm gear is disposed on the drive shaft, and a transmission worm is meshed on the side of the transmission worm gear. A connecting compartment is disposed inside the drive compartment. The drive shaft is disposed through the connecting compartment, and the transmission worm is disposed through the connecting compartment. The bottom of the transmission worm is mounted on the connecting compartment by a limiting bolt.

[0019] Furthermore, a threaded gear cylinder is connected to the transmission worm, a threaded drive column is threadedly connected to the threaded gear cylinder, and a second drive motor is connected to the threaded drive column;

[0020] The threaded gear cylinder is provided with a limit gear post on its side.

[0021] Furthermore, the liquid feeding mechanism includes a drive cylinder disposed on the mounting top platform and a liquid feeding pipe connected to the drive cylinder;

[0022] A transport pipe is provided on the side of the liquid inlet tube, and a liquid inlet is provided at the end of the liquid inlet tube.

[0023] Furthermore, the extrusion plate has several through holes at its center position. A sealing plate is rotatably installed on the inner wall of the bottom of the through hole at the center position. The end of the sealing plate is rotatably installed in the through hole via a connecting shaft. A torsion spring is installed on the connecting shaft. One end of the torsion spring is connected to the connecting shaft, and the other end is connected to the inner wall of the through hole.

[0024] The liquid inlet pipe is installed through the through hole.

[0025] Furthermore, the seepage detection module includes a visual acquisition element and a data analysis module;

[0026] The visual acquisition element is installed on the inner wall of the upper liquid tube. The visual acquisition element is used to acquire liquid surface images of droplets on the cake sample. The data analysis module is used to establish a coordinate graph and mark the liquid surface images corresponding to the received detection time points on the coordinate graph. The module also compares the highest liquid surface points of the two groups of cake samples at each detection time point to determine the relative water absorption capacity of the two groups of cake samples.

[0027] Furthermore, a cake recycling mechanism is provided above the cake forming mechanism;

[0028] The briquette recycling mechanism includes a lifting cylinder mounted on the mounting top seat, a positioning column connected to the lifting cylinder, and a recycling compartment located below the end of the translation platform.

[0029] The positioning post is disposed through the through hole located on the side, and the end of the positioning post extends into the shrink-forming chamber;

[0030] A third drive motor is provided on the limiting gear column.

[0031] To solve the above-mentioned technical problems, the present invention further provides the following technical solution: a comparative testing method for a water absorption performance comparison testing device for water-resistant gypsum board, comprising the following steps,

[0032] Step 100: Take two sets of slurry raw materials of different types of gypsum board and feed them onto two sets of testing devices at the same time;

[0033] Step 200: Multiple quantitative slurries are extruded and molded to form two sets of cake samples for later use;

[0034] Step 300: Simultaneously drop one drop of water at the center of the upper surface of each sample cake;

[0035] Step 400: Preset detection time points at the same intervals and acquire images of the liquid surface of water droplets on the cake sample at each detection time point;

[0036] Step 500: Using the center position of the upper surface of the cake sample as the center point, superimpose the two sets of liquid surface images on the same coordinate graph;

[0037] Step 600: Compare the highest liquid level of the two groups of cake samples at each detection time point to determine the relative water absorption capacity of the two groups of cake samples.

[0038] Compared with the prior art, the present invention has the following advantages:

[0039] This invention acquires images of the liquid surface of water droplets on the cake sample at each detection time point, overlays the liquid surface images of different types of cake samples on the same coordinate graph, and compares the highest point of the liquid surface of two groups of cake samples at each detection time point to determine the water absorption capacity of the two groups of cake samples. This allows for rapid comparative detection of the water absorption capacity of multiple groups of cake samples. The invention also performs extrusion molding, droplet placement, and droplet penetration detection in sequence, concentrating multiple steps in one location, reducing the number of operation steps, and automatically completing the droplet penetration detection. This effectively avoids the influence of human intervention in the detection process and improves detection efficiency and accuracy. Attached Figure Description

[0040] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0041] Figure 1 This is a schematic diagram of the feeding structure of a water-resistant gypsum board water absorption performance comparison and testing device provided in an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of the extrusion molding structure of a water-resistant gypsum board water absorption performance comparison and testing device provided in an embodiment of the present invention;

[0043] Figure 3 This is a schematic diagram of a water-dropping test device for comparing and testing the water absorption performance of water-resistant gypsum board according to an embodiment of the present invention.

[0044] Figure 4 This is a schematic diagram of the structure of a water-resistant gypsum board water absorption performance comparison and testing device for material recycling provided in an embodiment of the present invention;

[0045] Figure 5 for Figure 1A magnified structural diagram of A in the middle;

[0046] Figure 6 for Figure 2 A magnified structural diagram of B in the diagram;

[0047] Figure 7 for Figure 3 A magnified structural diagram of C;

[0048] Figure 8 This is a schematic diagram of the connection of the molded wall in an embodiment of the present invention;

[0049] Figure 9 This is a schematic diagram of the internal structure of the drive compartment and the connecting compartment in an embodiment of the present invention;

[0050] Figure 10 This is a top view of the drive compartment in an embodiment of the present invention;

[0051] Figure 11 This is a schematic diagram of the cross-sectional structure of the end of the upper liquid pipe in an embodiment of the present invention;

[0052] Figure 12 This is a structural block diagram of the water seepage detection module in an embodiment of the present invention.

[0053] The labels in the diagram represent the following:

[0054] 2-Extrusion molding mechanism; 3-Liquid feeding mechanism; 4-Pad recovery mechanism; 5-Shrink molding chamber; 6-Pad sample; 7-Transfer stage; 8-Shift drive structure; 9-Water seepage detection module;

[0055] 21-Mounting top platform; 22-Extrusion cylinder; 23-Extrusion plate; 24-Drive chamber; 25-Transfer groove; 26-Drive shaft column; 27-Transmission worm gear; 28-Transmission worm; 29-Connecting chamber; 210-Limit bolt; 211-Threaded gear cylinder; 212-Threaded drive column; 213-Second drive motor; 214-Limit gear column;

[0056] 31-Drive cylinder; 32-Liquid inlet pipe; 33-Liquid outlet; 34-Through hole; 35-Sealing plate; 36-Connecting shaft; 37-Transport pipe;

[0057] 41-Lifting cylinder; 42-Positioning column; 43-Recovery compartment; 44-Third drive motor;

[0058] 51 - Forming wall; 52 - Connecting cylinder;

[0059] 91-Vision acquisition element; 92-Data analysis module. Detailed Implementation

[0060] 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.

[0061] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention provides a device and method for comparative testing of the water absorption performance of water-resistant gypsum board, wherein the device comprises a shrink molding chamber 5, a displacement driving structure 8, an extrusion molding structure 8, an extrusion molding mechanism 2, a liquid feeding mechanism 3, and a water seepage detection module 9.

[0062] The system includes multiple shrink-forming chambers 5 arranged side-by-side, which provide space for the slurry to form a cake sample 6. The shrink-forming chambers 5 can shrink to allow the formed cake sample 6 to detach from their interior. A displacement drive structure 8 is mounted on the shrink-forming chambers 5 and drives them sequentially to a position directly below the slurry feeding point. An extrusion molding mechanism 2 is used by the displacement drive structure 8 to move the shrink-forming chambers 5 to a position corresponding to the extrusion molding mechanism 2, which extrudes the slurry within the shrink-forming chambers 5 to form the cake sample 6. A liquid feeding mechanism 3 is positioned above the shrink-forming chambers 5, passing through the extrusion molding mechanism 2 to directly above the cake sample 6 and dripping a measured amount of water onto the center of the cake sample 6. A water seepage detection module 9 is located inside the liquid feeding end of the liquid feeding mechanism 3 and periodically acquires images of the water surface on the cake sample 6 to analyze its water absorption performance.

[0063] In this embodiment of the invention, by setting up a liquid loading mechanism 3, liquid surface images of water droplets on the cake sample 6 are acquired at each detection time point. The liquid surface images of different types of cake samples 6 are superimposed on the same coordinate graph, and the highest liquid surface points of two groups of cake samples 6 at each detection time point are compared to determine the relative water absorption performance of the two groups of cake samples. This allows for rapid comparative testing of the water absorption performance of multiple groups of cake samples 6. The extrusion molding, droplet placement, and droplet penetration detection processes are performed sequentially, concentrating multiple steps in one location, reducing operational steps, and automatically completing the droplet penetration detection. This effectively avoids the influence of manual intervention in the detection process, improving detection efficiency and accuracy. This invention achieves the detection of the water absorption performance of the cake sample 6 through fully automated sampling and testing. In practical applications, the formula can be adjusted based on the water absorption performance.

[0064] In order to enable the shrink-molding chamber 5 to be shrunk for use, so as to facilitate the unloading of the sample cake 6, the present invention also includes the following design, such as... Figure 6 and Figure 8 As shown, the shrink-forming chamber 5 is formed by sequentially connected forming walls 51. A translation platform 7 is provided at the bottom of the forming wall, and a connecting cylinder 52 is provided inside the translation platform 7. The forming wall 51 is connected to the output end of the connecting cylinder 52.

[0065] When the slurry needs to be extruded and molded, the connecting cylinder 52 drives the molding wall 51 to move upward, forming a shrink molding chamber 5. When the cake sample 6 needs to be unloaded, the connecting cylinder 52 drives the molding wall 51 to move downward, releasing the shrink molding chamber 5 from limiting the cake sample 6.

[0066] To extrude and mold the slurry into a cake sample 6, the present invention provides an extrusion molding mechanism 2. The extrusion molding mechanism 2 of the present invention mainly adopts the following preferred embodiments, such as... Figure 1 and Figure 5 As shown, the extrusion molding mechanism 2 includes a mounting top platform 21 disposed above the translation stage 7, an extrusion cylinder 22 disposed on the mounting top platform 21, and an extrusion plate 23 connected to the output end of the extrusion cylinder 22; the extrusion plate 23 fits into the inner wall of the shrink molding chamber 5, and the mounting top platform 21 is fixed.

[0067] The extrusion cylinder 22 drives the extrusion plate 23 to move downward, extruding the slurry in the shrink molding chamber 5.

[0068] To ensure that slurry is sequentially fed into each shrink-forming chamber 5, the translation stage 7 in this invention is capable of translation. To drive the translation stage 7, a displacement driving structure 8 is provided, such as... Figure 9 and Figure 10 As shown, a drive compartment 24 is provided on the side of the translation stage 7, and a translation groove 25 is provided on the inner wall of the drive compartment 24; a drive shaft column 26 is fixedly provided at the end of the translation stage 7, and the end of the drive shaft column 26 is slidably disposed in the translation groove 25; a transmission worm gear 27 is provided on the drive shaft column 26, and a transmission worm 28 is meshed on the side of the transmission worm gear 27; a connecting compartment 29 is provided inside the drive compartment 24, the drive shaft column 26 is disposed through the connecting compartment 29, the transmission worm 28 is disposed through the connecting compartment 29, and the bottom of the transmission worm 28 is mounted on the connecting compartment 29 by a limiting bolt 210.

[0069] In the above embodiment, the movement of the connecting compartment 29 can drive the drive shaft column 26 to move, causing the drive shaft column 26 to slide within the translation groove 25, thereby driving the translation stage 7 to translate via the drive shaft column 26.

[0070] In order to move the connecting compartment 29, the present invention also incorporates the following design features, such as... Figure 9As shown, a threaded gear cylinder 211 is connected to the transmission worm 28, a threaded drive column 212 is threadedly connected to the threaded gear cylinder 211, and a second drive motor 213 is connected to the threaded drive column 212; a limit gear column 214 is provided on the side of the threaded gear cylinder 211.

[0071] The translation drive process of the displacement drive structure 8 is as follows: the second drive motor 213 drives the threaded drive column 212 to rotate. Under the rotation of the threaded drive column 212 and the limiting action of the limiting gear column 214, the threaded gear cylinder 211 gradually moves outward, thereby driving the transmission worm 28 to move outward. Through the transmission worm 28, the connecting chamber 29 moves outward, thereby driving the translation stage 7 to move, so that each shrink molding chamber 5 moves sequentially to below the slurry feeding point.

[0072] This invention uses a liquid-feeding mechanism 3 to drip a drop of water onto the center of the cake sample 6. The liquid-feeding mechanism 3 of this invention mainly adopts the following preferred embodiments, such as... Figure 7 and Figure 11 As shown, the liquid feeding mechanism 3 includes a drive cylinder 31 mounted on the mounting top platform 21 and a liquid feeding pipe 32 connected to the drive cylinder 31; a transport pipe 37 is provided on the side of the liquid feeding pipe 32 and a liquid feeding port 33 is provided at the end of the liquid feeding pipe 32.

[0073] A pressure device can be installed at the end of the transport pipe 37. Under the action of the pressure device, the liquid part in the transport pipe 37 is dripped onto the cake sample 6 through the upper liquid pipe body 32 and the upper liquid port 33 in order to detect the absorption of the liquid droplets on the cake sample 6.

[0074] To facilitate the direct passage of the liquid inlet tube 32 through the extrusion plate 23, allowing the liquid droplets to be dripped onto the sample cake 6 without obstruction, the present invention provides several through holes 34 at the center of the extrusion plate 23. In addition, to ensure that the bottom surface of the extrusion plate 23 is sealed when not penetrated, a sealing plate 35 is rotatably provided on the inner wall of the bottom of the through hole 34 located at the center. The end of the sealing plate 35 is rotatably provided in the through hole 34 via a connecting shaft 36. A torsion spring is provided on the connecting shaft 36, with one end of the torsion spring connected to the connecting shaft 36 and the other end connected to the inner wall of the through hole 34.

[0075] In the above embodiment, the sealing plate 35 fits with the bottom surface of the extrusion plate 23 under the action of the torsion spring, and the bottom surface of the extrusion plate 23 is in a sealed state. When it is necessary to drip liquid, the upper liquid tube 32 passes through the through hole 34 located in the middle position. The sealing plate 35 rotates, and the upper liquid tube 32 passes through the bottom of the through hole 34.

[0076] This invention uses a water seepage detection module 9 to periodically acquire images of the liquid surface of water droplets on the cake sample 6, in order to analyze the water absorption performance of the cake sample 6. Figure 11 and Figure 12 As shown, the seepage detection module 9 includes a visual acquisition element 91 and a data analysis module 92. The visual acquisition element 91 is installed on the inner wall of the upper liquid pipe 32. The visual acquisition element 91 is used to periodically acquire liquid surface images of droplets on the material cake sample 6. The data analysis module 92 is used to establish a coordinate graph and mark the liquid surface images corresponding to the received detection time points on the coordinate graph. By comparing the highest liquid surface points of the two groups of material cake samples 6 at each detection time point, the relative water absorption performance of the two groups of material cake samples 6 can be determined.

[0077] The present invention includes a cake recovery mechanism 4 above the cake forming mechanism 2, which recovers the cake sample 6. The cake recovery mechanism 4 of the present invention mainly adopts the following preferred embodiments, such as... Figure 2 and Figure 6 As shown, the material cake recycling mechanism 4 includes a lifting cylinder 41 mounted on the mounting top seat 21, a positioning column 42 connected to the lifting cylinder 41, and a recycling chamber 43 located below the end of the translation table 7; the positioning column 42 is disposed through the through hole 34 located on the side, and the end of the positioning column 42 extends into the shrink-forming chamber 5.

[0078] In the above embodiment, the positioning column 42 extends into the slurry during the slurry forming process, so that after the slurry is formed, the positioning column 42 can drive the cake sample 6 to detach from the shrink forming chamber 5.

[0079] In order to move the cake sample 6 from the positioning column 42, the extrusion plate 23 moves down so that the cake sample 6 falls onto the translation platform 7. In order to enable the cake sample 6 to enter the recycling chamber 43, the translation platform 7 can rotate in this invention.

[0080] To drive the translation stage 7 to rotate, a third drive motor 44 is installed on the limiting gear column 214. When it is necessary to drive the translation stage 7 to rotate, the second drive motor 213 remains stationary, and the third drive motor 44 drives the limiting gear column 214 to rotate. Under the action of the rotation of the limiting gear column 214, the threaded gear cylinder 211 rotates forward, thereby driving the translation stage 7 to move forward. Furthermore, under the rotation of the threaded gear cylinder 211, the transmission worm 28 rotates, driving the transmission worm wheel 27 to rotate, thereby driving the drive shaft column 26 to rotate, and thus driving the translation stage 7 to rotate.

[0081] In summary, the main implementation process of the present invention is as follows: the pre-drive connecting cylinder 52 drives the molding wall 51 to move upward to form a shrink molding chamber 5; the second drive motor 213 drives the threaded drive column 212 to rotate; under the rotation of the threaded drive column 212 and the limiting action of the limiting gear column 214, the threaded gear cylinder 211 gradually moves outward, thereby driving the translation table 7 to move, so that each shrink molding chamber 5 moves sequentially to below the slurry feeding point, and the slurry enters the shrink molding chamber 5.

[0082] Extrusion molding: such as Figure 2 and Figure 6 As shown, the extrusion cylinder 22 drives the extrusion plate 23 to move downward, extruding the slurry in the shrink molding chamber 5. After a period of time, the extrusion cylinder 22 resets and drives the extrusion plate 23 to move upward.

[0083] Water seepage detection: such as Figure 3 and Figure 7 As shown, the driving cylinder 31 drives the upper liquid pipe 32 to move down and pass through the through hole 34. The liquid part in the transport pipe 37 is dripped onto the material cake sample 6 through the upper liquid pipe 32 and the upper liquid port 33. The liquid surface image of the droplets on the material cake sample 6 is periodically collected. The liquid surface images corresponding to the same detection time point are combined and marked on the coordinate graph. By comparing the highest liquid surface of the two groups of material cake samples 6 at each detection time point, the water absorption performance of the two groups of material cake samples 6 can be compared and determined.

[0084] Material preparation: such as Figure 4 As shown, after the test is completed, the lifting cylinder 41 drives the positioning column 42 to move upward. At the same time, the connecting cylinder 52 drives the forming wall 51 to move downward, releasing the restriction of the shrink forming chamber 5 on the material cake sample 6. The material cake sample 6 quickly detaches from the shrink forming chamber 5 following the positioning column 42. At this time, the extrusion cylinder 22 is driven to move the extrusion plate 23 downward, so that the material cake sample 6 falls into the translation stage 7. The third drive motor 44 drives the limiting gear column 214 to rotate. Under the action of the rotation of the limiting gear column 214, the threaded gear cylinder 211 rotates forward, thereby driving the translation stage 7 to move forward and rotate. The material cake sample 6 falls into the recovery chamber 43 under the action of gravity.

[0085] The present invention provides a comparative testing method for a comparative testing device of water absorption performance of water-resistant gypsum board, comprising the following steps:

[0086] Step 100: Take two sets of slurry raw materials of different types of gypsum board and feed them onto two sets of testing devices at the same time;

[0087] Step 200: Multiple quantitative slurries are extruded and molded to form two sets of cake samples 6 for later use;

[0088] Step 300: Simultaneously drop a drop of water at the center of the upper surface of each sample cake 6;

[0089] Step 400: Preset detection time points at the same intervals and acquire liquid surface images of water droplets on the cake sample 6 at each detection time point;

[0090] Step 500: Using the center position of the upper surface of the cake sample 6 as the center point, superimpose the two sets of liquid surface images on the same coordinate graph;

[0091] Step 600: Compare the highest liquid level of the two groups of cake samples 6 at each detection time point to determine the relative water absorption capacity of the two groups of cake samples.

[0092] During the above experiment, ensure that the feed cake and water are at room temperature before dripping water.

[0093] The above-mentioned testing and comparison method can be used to compare the water absorption performance between two or more types of gypsum boards. Alternatively, one type of gypsum board can be set as a standard water-resistant gypsum board, and the other type of gypsum board can be set as an ordinary gypsum board to be tested. The water-resistant gypsum board is the gypsum board whose water absorption performance just meets the standard. By comparing the water absorption performance of the two types of gypsum boards, it can be determined whether the water absorption performance of the ordinary gypsum board to be tested meets the standard.

[0094] The above embodiments are merely exemplary embodiments of this application and are not intended to limit this application. The scope of protection of this application is defined by the claims. Those skilled in the art can make various modifications or equivalent substitutions to this application within its substance and scope of protection, and such modifications or equivalent substitutions should also be considered to fall within the scope of protection of this application.

Claims

1. A device for comparing and testing the water absorption performance of water-resistant gypsum board, characterized in that, have: Multiple shrink molding chambers (5) are provided and arranged in parallel. The shrink molding chambers (5) are used to provide space for molding the slurry to form a cake sample (6). The shrink molding chambers (5) can shrink so that the molded cake sample (6) can be removed from the interior of the shrink molding chambers (5). The displacement drive structure (8) is used to drive the shrink molding chamber (5) to be transported sequentially to the area directly below the slurry feeding point. The extrusion molding mechanism (2) and the displacement driving structure (8) drive the shrink molding chamber (5) to move to the position corresponding to the extrusion molding mechanism (2). The extrusion molding mechanism (2) extrudes the slurry in the shrink molding chamber (5) to form the cake sample (6). The liquid feeding mechanism (3) is correspondingly set above the shrink molding chamber (5). The liquid feeding mechanism (3) can pass through the extrusion molding mechanism (2) to the top of the cake sample (6) and drip a certain amount of clean water onto the center position of the cake sample (6). The water seepage detection module (9) is located inside the liquid feeding end of the liquid feeding mechanism (3). The water seepage detection module (9) is used to periodically acquire liquid surface images of water droplets on the cake sample (6) in order to analyze the water absorption performance of the cake sample (6). The liquid feeding mechanism (3) includes a drive cylinder (31) mounted on the mounting top platform (21) and a liquid feeding pipe (32) connected to the drive cylinder (31). The upper liquid pipe body (32) is provided with a transport pipe (37) on its side and an upper liquid port (33) is provided at the end of the upper liquid pipe body (32). The extrusion plate (23) has several through holes (34) at its center. A sealing plate (35) is rotatably installed on the inner wall of the bottom of the through hole (34) at the center. The end of the sealing plate (35) is rotatably installed in the through hole (34) via a connecting shaft (36). A torsion spring is installed on the connecting shaft (36). One end of the torsion spring is connected to the connecting shaft (36), and the other end is connected to the inner wall of the through hole (34). The liquid inlet tube (32) is disposed through the through hole (34).

2. The device for comparing and testing the water absorption performance of water-resistant gypsum board according to claim 1, characterized in that, The shrink-molded chamber (5) is formed by sequentially connected molding walls (51); The bottom of the forming wall (51) is provided with a translation stage (7), and a connecting cylinder (52) is provided inside the translation stage (7). The forming wall (51) is connected to the output end of the connecting cylinder (52).

3. The device for comparing and testing the water absorption performance of water-resistant gypsum board according to claim 2, characterized in that, The extrusion molding mechanism (2) includes a mounting top platform (21) disposed above the translation stage (7), an extrusion cylinder (22) disposed on the mounting top platform (21), and an extrusion plate (23) connected to the output end of the extrusion cylinder (22). The extrusion plate (23) fits into the inner wall of the shrink-molded chamber (5).

4. The device for comparing and testing the water absorption performance of water-resistant gypsum board according to claim 3, characterized in that, The displacement drive structure (8) includes a drive cabin (24) disposed on the side of the translation stage (7), a translation groove (25) disposed on the inner wall of the drive cabin (24), and a drive shaft column (26) fixedly disposed at the end of the translation stage (7). The end of the drive shaft (26) is slidably disposed in the translation groove (25). A transmission worm gear (27) is disposed on the drive shaft (26). A transmission worm (28) is meshed on the side of the transmission worm gear (27). A connecting compartment (29) is disposed in the drive compartment (24). The drive shaft (26) is disposed through the connecting compartment (29). The transmission worm (28) is disposed through the connecting compartment (29). The bottom of the transmission worm (28) is mounted on the connecting compartment (29) by a limiting bolt (210).

5. The device for comparing and testing the water absorption performance of water-resistant gypsum board according to claim 4, characterized in that, A threaded gear cylinder (211) is connected to the transmission worm (28), a threaded drive column (212) is threadedly connected to the threaded gear cylinder (211), and a second drive motor (213) is connected to the threaded drive column (212). The threaded gear cylinder (211) is provided with a limit gear post (214) on its side.

6. The device for comparing and testing the water absorption performance of water-resistant gypsum board according to claim 5, characterized in that, The seepage detection module (9) includes a visual acquisition element (91) and a data analysis module (92). The visual acquisition element (91) is set on the inner wall of the liquid inlet tube (32). The visual acquisition element (91) is used to acquire liquid surface images of droplets on the cake sample (6). The data analysis module (92) is used to establish a coordinate graph and mark the liquid surface images corresponding to the received detection time points on the coordinate graph. The module also compares the highest liquid surface points of the two sets of cake samples (6) at each detection time point to determine the strength of water absorption of the two sets of cake samples (6).

7. The device for comparing and testing the water absorption performance of water-resistant gypsum board according to claim 6, characterized in that, A cake recycling mechanism (4) is provided above the extrusion molding mechanism (2); The cake recycling mechanism (4) includes a lifting cylinder (41) installed on the mounting top platform (21), a positioning column (42) connected to the lifting cylinder (41), and a recycling chamber (43) installed below the end of the translation platform (7). The positioning post (42) is disposed through the through hole (34) located on the side, and the end of the positioning post (42) extends into the shrink-formed cabin (5); A third drive motor (44) is provided on the limiting gear column (214).

8. A comparative testing method for a comparative testing device for the water absorption performance of water-resistant gypsum board according to any one of claims 1 to 7, characterized in that, Includes the following steps, Step 100: Take two sets of slurry raw materials of different types of gypsum board and feed them onto two sets of testing devices at the same time; Step 200: Multiple quantitative slurries are extruded and molded to form two sets of cake samples for later use; Step 300: Simultaneously drop one drop of water at the center of the upper surface of each sample cake; Step 400: Preset detection time points with the same intervals and acquire the liquid surface image of water droplets on the cake sample at each detection time point; Step 500: Using the center position of the upper surface of the cake sample as the center point, superimpose the two sets of liquid surface images on the same coordinate graph; Step 600: Compare the highest liquid level of the two groups of cake samples at each detection time point to determine the relative water absorption capacity of the two groups of cake samples.

Images