Polyurethane material hydroscopicity detection device

Abstract

The invention belongs to the technical field of new material detection, and particularly relates to a polyurethane material hydroscopicity detection device which comprises a workbench, a water tank is fixedly mounted at the top of the workbench and made of a transparent material, a dial gauge is arranged on the outer wall of the water tank, a lifting guide rail is arranged above the workbench, and the lifting guide rail is arranged on the workbench. And an advancing screw rod is rotationally installed on the inner wall of the lifting guide rail, a driving motor is fixedly installed at the top of the lifting guide rail, the output end of the driving motor is fixedly connected with one end of the advancing screw rod, and a lifting seat is slidably installed on the inner wall of the lifting guide rail. The initial water capacity is recorded before the polyurethane material is put into the water tank, the material is taken out after water absorption and stands for a period of time, the residual water capacity is read after the water is still again, and the water absorption capacity of the polyurethane material can be accurately obtained through simple subtraction. According to the design, measurement errors are greatly reduced, and the accuracy of a detection result is improved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of new material detection, and particularly relates to a polyurethane material water absorption detection device. BACKGROUND

[0002] As a kind of polymer material, polyurethane material has the characteristics of adjustable physical properties such as density, elasticity and rigidity, and is widely used in many fields such as light industry, chemical industry, electronics, textile, medical treatment, building, building material, automobile, national defense, spaceflight and aviation. Performance optimization and new material development are important directions of new material research. Water absorption is one of important performance indexes of polyurethane material, and directly affects the use effect and service life of the material. Therefore, water absorption detection is crucial for evaluating the quality and performance of polyurethane material, and is a key link of new material performance detection.

[0003] The existing detection device has a complex structure and involves multiple steps and complicated operation processes. Before detection, the polyurethane material is accurately weighed and placed in a specific container, and then the container is placed in a detection cavity filled with water. After detection, the material needs to be taken out and accurately weighed again to calculate the water absorption. The whole process requires high professional skills and rich experience of the operator, otherwise operation errors may occur, resulting in inaccurate detection results. Moreover, the complex operation process prolongs the detection time and reduces the detection efficiency, which cannot meet the needs of large-scale production and rapid quality detection.

[0004] Therefore, the application provides a polyurethane material water absorption detection device. SUMMARY

[0005] In order to make up for the deficiencies of the prior art and solve at least one technical problem in the background art.

[0006] The technical scheme adopted by the application to solve the technical problems is that the polyurethane material water absorption detection device comprises a workbench, a water tank is fixedly installed on the top of the workbench, the water tank is made of transparent material, a scale table is arranged on the outer wall of the water tank, a lifting guide rail is arranged above the workbench, a traveling screw is rotatably installed on the inner wall of the lifting guide rail, a driving motor is fixedly installed on the top of the lifting guide rail, the output end of the driving motor is fixedly connected with one end of the traveling screw, a lifting seat is slidably installed on the inner wall of the lifting guide rail, the inner wall of the lifting seat is threadedly connected with the outer wall of the traveling screw, and a material placing assembly is arranged on the outer wall of the lifting seat.

[0007] Preferably, the material placing assembly comprises a lifting plate fixedly installed on the outer wall of the lifting seat, and a connecting column is fixedly installed on the inner wall of the lifting plate symmetrically, and a placing frame is arranged between the ends of the connecting column away from the lifting plate.

[0008] Preferably, a pressing plate is slidingly installed between the outer walls of the connecting column, and an elastic piece A is fixedly installed between the top of the pressing plate and the bottom of the lifting plate symmetrically, and the elastic piece A is sleeved on the outer side of the connecting column respectively.

[0009] Preferably, a limiting plate is fixedly installed on the top of the placing frame, and the placing frame is slidingly connected with the connecting column through the limiting plate, and a supporting plate is fixedly installed on the top of the placing frame symmetrically, and an elastic piece B is fixedly installed between the supporting plate on the same side and the connecting column, and an extrusion assembly is arranged on one side of the placing frame.

[0010] Preferably, the extrusion assembly comprises a side plate fixedly installed on one side of the placing frame, and a plurality of stress teeth are fixedly installed on the side of the side plate away from the placing frame, and an extension block is fixedly installed on one side of the inner wall of the water tank, and an extrusion tooth A is fixedly installed on the outer wall of the extension block, and the extrusion tooth A is located below the stress tooth.

[0011] Preferably, an extrusion plate is symmetrically arranged below the pressing plate, and a connecting seat is slidingly installed on the inner wall of the pressing plate symmetrically, and the connecting seat is fixedly connected with the extrusion plate, and an extension plate is fixedly installed on the outer wall of the connecting seat, and an elastic piece C is fixedly installed between the extension plate and the pressing plate, and a limiting assembly is arranged on the top of the water tank.

[0012] Preferably, the limiting assembly comprises two positioning supports fixedly installed on the top of the water tank symmetrically, and a positioning plate is fixedly installed on the horizontal section of the positioning support, and the positioning plate is located above the extension plate respectively.

[0013] Preferably, a connecting frame is fixedly installed on one side of the extrusion plate, and an extrusion tooth B is fixedly installed between the connecting frames, and the extrusion tooth B is located above the stress tooth.

[0014] Preferably, a wind guide pipe is fixedly installed on the inner wall of the connecting column, and a shunt pipe is fixedly installed on the inner wall of the connecting column symmetrically, and the shunt pipe is in communication with the wind guide pipe, and a one-way valve is fixedly installed on one end of the shunt pipe, and a hot air blower is fixedly installed on the back of the lifting guide rail, and two connecting hoses are fixedly installed on the inner wall of the hot air blower, and one end of the connecting hose is in communication with one end of the wind guide pipe respectively.

[0015] Preferably, the bottom of the water tank is fixedly provided with a drain pipe, one end of the drain pipe is threadedly provided with a drain valve penetrating through the workbench, the workbench is fixedly provided with a support seat between the lifting guide rails, and the bottom of the workbench is fixedly provided with a plurality of supporting legs.

[0016] The beneficial effects of the present application are as follows:

[0017] 1. The water tank is made of transparent material and the outer wall is provided with a scale, which allows the operator to clearly and intuitively observe the change of water level in the water tank during the detection process. The initial water capacity is recorded before the polyurethane material is placed in the water tank for water absorption. After the material is taken out and left for a period of time, the remaining water capacity is read when the water is still again. The water absorption of the polyurethane material can be accurately obtained by simple subtraction operation. Compared with some devices that require complex instruments or indirect measurement methods, this design greatly reduces the measurement error and improves the accuracy of the detection result.

[0018] 2. The water tank is made of transparent material and the outer wall is provided with a scale, which allows the operator to clearly and intuitively observe the change of water level in the water tank during the detection process. The initial water capacity is recorded before the polyurethane material is placed in the water tank for water absorption. After the material is taken out and left for a period of time, the remaining water capacity is read when the water is still again. The water absorption of the polyurethane material can be accurately obtained by simple subtraction operation. Compared with some devices that require complex instruments or indirect measurement methods, this design greatly reduces the measurement error and improves the accuracy of the detection result.

[0019] 3. The water tank is made of transparent material and the outer wall is provided with a scale, which allows the operator to clearly and intuitively observe the change of water level in the water tank during the detection process. The initial water capacity is recorded before the polyurethane material is placed in the water tank for water absorption. After the material is taken out and left for a period of time, the remaining water capacity is read when the water is still again. The water absorption of the polyurethane material can be accurately obtained by simple subtraction operation. Compared with some devices that require complex instruments or indirect measurement methods, this design greatly reduces the measurement error and improves the accuracy of the detection result. BRIEF DESCRIPTION OF DRAWINGS

[0020] The present application will be further described below with reference to the accompanying drawings.

[0021] Figure 1 is a perspective view of the present application;

[0022] Figure 2 is another perspective view of the present application;

[0023] Figure 3 is a structure diagram of the water tank of the present application;

[0024] Figure 4 is the structure schematic diagram of the lifting guide rail of the present application;

[0025] Figure 5 is the structure schematic diagram of the pressing plate of the present application;

[0026] Figure 6 is the structure schematic diagram of the extruding plate of the present application;

[0027] Figure 7 is the structure schematic diagram of the placing frame of the present application;

[0028] Figure 8 is the structure schematic diagram of the side plate of the present application;

[0029] Figure 9 is the structure sectional view of the water tank of the present application;

[0030] Figure 10 is the structure sectional view of the connecting column of the present application.

[0031] In the figure: 1, workbench; 2, water tank; 3, lifting guide rail; 4, traveling screw rod; 5, driving motor; 6, lifting seat; 7, lifting plate; 8, connecting column; 9, placing frame; 10, cross rod; 11, pressing plate; 12, elastic member A; 13, limiting plate; 14, supporting plate; 15, elastic member B; 16, side plate; 17, force receiving tooth; 18, extension block; 19, extruding tooth A; 20, extruding plate; 21, connecting seat; 22, extension plate; 23, elastic member C; 24, positioning support; 25, positioning plate; 26, connecting frame; 27, extruding tooth B; 28, air duct; 30, shunt pipe; 31, one-way valve; 32, hot air blower; 33, connecting hose; 34, drain pipe; 35, drain valve; 36, supporting seat; 37, supporting leg. DETAILED DESCRIPTION

[0032] In order to make the technical means, creative features, purposes and effects of the present application easy to understand, the present application is further described below in combination with specific embodiments.

[0033] As Figures 1 to 5As shown in the embodiment of the present invention, a polyurethane material water absorption testing device includes a workbench 1, a water tank 2 fixedly installed on the top of the workbench 1, the water tank 2 being made of transparent material, a scale being provided on the outer wall of the water tank 2, a lifting guide rail 3 being provided above the workbench 1, a traveling screw 4 being rotatably installed on the inner wall of the lifting guide rail 3, a drive motor 5 being fixedly installed on the top of the lifting guide rail 3, the output end of the drive motor 5 being fixedly connected to one end of the traveling screw 4, a lifting seat 6 being slidably installed on the inner wall of the lifting guide rail 3, the inner wall of the lifting seat 6 being threadedly connected to the outer wall of the traveling screw 4, and a material placement component being provided on the outer wall of the lifting seat 6;During the testing process, a fixed amount of water is first added to water tank 2. Then, the polyurethane material to be tested is placed inside the material placement assembly. After the water in water tank 2 settles, the water volume in water tank 2 is observed and recorded using the scale on water tank 2. Next, the drive motor 5 is started to rotate the traveling screw 4. When the traveling screw 4 rotates, it engages with the threaded connection of the lifting seat 6, causing the lifting seat 6 to descend. As the lifting seat 6 descends, it pulls the material placement assembly down, which then enters the water tank 2, allowing the polyurethane material to enter the water. The polyurethane material remains in the water for a certain period of time. The process continues until the water inside the tank is saturated. Then, the drive motor 5 reverses the travel screw 4, causing the material placement component to remove the polyurethane material from the water tank 2. After the polyurethane material is removed, it is left to stand for a period of time. Once the water in the tank 2 has settled again, the remaining water volume in the tank 2 is read using a scale. By calculating the reduction in water volume in the tank 2, the amount of water absorbed by the polyurethane material can be determined. In summary, the water tank 2 is made of transparent material and has a scale on its outer wall. This design allows the operator to clearly and intuitively observe the changes in the water level inside the tank 2 during the testing process. The initial water level is recorded before the polyurethane material is placed in the water tank 2 to absorb water. The water absorption capacity is determined by removing the material after water absorption and allowing it to stand for a period of time until the water settles again. The remaining water volume is then read. This simple subtraction operation accurately calculates the water absorption of the polyurethane material. Compared to devices requiring complex instruments or indirect measurement methods, this design significantly reduces measurement errors and improves the accuracy of the test results. The drive motor 5 rotates the traveling screw 4, causing the lifting seat 6 to lower the material placement component, allowing the polyurethane material to slowly enter the water. This controllable descent ensures the material is smoothly immersed, avoiding splashing or air bubbles on the material surface caused by rapid immersion. This ensures the material fully contacts the water, guaranteeing uniform and sufficient water absorption and further improving the reliability of the test results. The entire testing process is automated, relying on the drive motor 5 to rotate the traveling screw 4 to raise and lower the material placement component. Operators only need to perform simple initial settings, such as adding a quantitative amount of water, placing the material, and recording the scale. There is no need for repeated manual immersion and removal of the material, greatly saving manpower and time and significantly improving testing efficiency. The entire process can be completed in a short time, making it particularly suitable for batch testing of polyurethane materials, effectively shortening production or R&D cycles.

[0034] like Figures 4 to 7As shown, the material placement assembly includes a lifting plate 7, which is fixedly installed on the outer wall of the lifting base 6. Connecting columns 8 are symmetrically fixedly installed on the inner wall of the lifting plate 7. A placement frame 9 is provided between the ends of the connecting columns 8 furthest from the lifting plate 7. Several crossbars 10 are fixedly installed on the inner wall of the placement frame 9. During testing, the polyurethane material to be tested is placed inside the placement frame 9 and supported by the crossbars 10. This eliminates the need for complex clamps to fix the material, increasing the convenience of testing. Compared to the traditional method requiring cumbersome installation and adjustment of clamps, this significantly saves preparation time, simplifies the operation process, and improves the efficiency of testing, making it particularly suitable for batch testing scenarios. After the polyurethane material is placed, the lifting base 6 lowers the placement frame 9 via the lifting plate 7 and connecting columns 8, allowing the placement frame 9 to enter the inner side of the water tank 2. The process involves submerging the polyurethane material in the water. The simple limiting mechanism of the placement frame 9 ensures the polyurethane material is fully submerged, preventing it from floating and guaranteeing sufficient contact with water. This allows water to penetrate evenly, increasing the water absorption rate and shortening the testing time. Since no clamps are used to hold the polyurethane material, it can deform freely inside the placement frame 9. During water absorption, the polyurethane material expands, preventing stress concentration or uneven water absorption caused by clamps. This ensures the polyurethane material absorbs water fully, resulting in more accurate test results that reflect its water absorption performance. It also reduces measurement errors caused by insufficient water absorption, improving the accuracy of the test results.

[0035] like Figures 3 to 6As shown, a pressure plate 11 is slidably installed between the outer walls of the connecting column 8. Elastic elements A12 are symmetrically fixed between the top of the pressure plate 11 and the bottom of the lifting plate 7, respectively sleeved on the outer side of the connecting column 8. When the placement frame 9 immerses the polyurethane material in water, the lifting plate 7 and connecting column 8 continue to descend under the action of the drive motor 5. This descent causes the pressure plate 11 to enter the inner side of the water tank 2. After entering the water tank 2, the pressure plate 11 squeezes the water inside the tank. At this time, the drive motor 5 rotates reciprocally, intermittently squeezing the water in the water tank 2. The intermittent squeezing of the water in the water tank 2 by the pressure plate 11 under the action of the drive motor 5 creates a dynamic pressure field. This pressure change allows water molecules to gain additional kinetic energy, enabling them to penetrate the polyurethane material more quickly and deeply. Compared to static immersion, the dynamic pressure field disrupts the diffusion balance of water molecules on the material surface, promoting… Water molecules continuously migrate into the interior of the material, significantly shortening the time required for the polyurethane material to reach water saturation. The polyurethane material contains numerous tiny pores and channels. Under the influence of a dynamic pressure field, the pressure on the water constantly changes, allowing it to enter these pores more effectively. When the pressure increases, water is forced into the pores; when the pressure decreases, air is expelled from the pores, creating conditions for the next water entry. This repeated pressure change allows the pores inside the material to be more fully filled with water, accelerating the water absorption process. Because the dynamic pressure field significantly shortens the water absorption time of the polyurethane material, the entire testing cycle is also greatly shortened, enabling testing personnel to complete the testing of a large number of samples in a shorter time, improving work efficiency and reducing time costs. By introducing a dynamic pressure field into the testing process, the water absorption situation of the material in actual use can be more realistically simulated, making the test results more reflective of the material's performance under actual conditions.

[0036] like Figures 7 to 9As shown, a limiting plate 13 is fixedly installed on the top of the placement frame 9. The placement frame 9 is slidably connected to the connecting column 8 through the limiting plate 13. A support plate 14 is symmetrically fixedly installed on the top of the placement frame 9. An elastic element B15 is fixedly installed between the support plate 14 and the connecting column 8 on the same side. A squeezing assembly is provided on one side of the placement frame 9. The placement frame 9 is slidably connected to the connecting column 8 through the limiting plate 13. The elastic element B15 enables the placement frame 9 to have the characteristic of automatic reset. When the placement frame 9 drives the polyurethane material into the water, the squeezing assembly will cooperate with the elastic element B15 to make the placement frame 9 vibrate back and forth when the placement frame 9 moves up and down. When the placement frame 9 vibrates, it will drive the polyurethane material to vibrate. When the polyurethane material is stationary in the water, a relatively stable water boundary layer will form on its surface. This boundary layer will prevent water molecules from further diffusing into the material. When the placement frame 9 moves up and down while driving the polyurethane material to vibrate, the movement of the material can destroy this boundary layer. The layer allows fresh water molecules to continuously contact the material surface, accelerating their penetration into the material's interior and significantly increasing the water absorption rate. Polyurethane materials contain numerous tiny pores, which may contain air. The vibration and pressure changes generated during material shaking promote the faster expulsion of this air, creating space for water molecules to fill the pores more quickly and accelerating the absorption process. The mechanical energy generated by shaking is transferred to the water molecules, increasing their kinetic energy and accelerating their diffusion within the material. This allows for deeper penetration into all parts of the material, shortening the time required for the material to reach saturation. Due to the significantly increased absorption rate, polyurethane materials reach saturation in a shorter time. This means that testing personnel do not need to wait long for the material to absorb water, allowing for faster completion of a testing process, thus greatly reducing the time required for a single test and improving overall testing efficiency.

[0037] like Figures 7 to 9As shown, the extrusion assembly includes a side plate 16, which is fixedly installed on one side of the placement frame 9. Several force-bearing teeth 17 are fixedly installed on the side of the side plate 16 away from the placement frame 9. An extension block 18 is fixedly installed on one side of the inner wall of the water tank 2, and extrusion teeth A19 are fixedly installed on the outer wall of the extension block 18. The extrusion teeth A19 are located below the force-bearing teeth 17. The force-bearing teeth 17 are connected to the placement frame 9 through the side plate 16. After the placement frame 9 enters the water tank 2, the force-bearing teeth 17 will reach the extrusion teeth A19. When the placement frame 9 reciprocates, the force-bearing teeth 17... 7 will follow the reciprocating rise and fall. During the reciprocating rise and fall of the force-bearing tooth 17, the force-bearing tooth 17 will cyclically collide with the extrusion tooth A19. The extrusion tooth A19 will sequentially extrude each force-bearing tooth 17. The force generated by this extrusion acts on the placement frame 9 in a regular pulse form, thereby causing the polyurethane material to reciprocate and vibrate. This rhythmic mechanical vibration can continuously break the stable boundary layer formed between the material surface and water, allowing fresh water molecules to continuously contact the material surface, accelerating the penetration of water molecules into the material interior, and significantly improving the water absorption rate.

[0038] like Figures 3 to 7 As shown, extrusion plates 20 are symmetrically arranged below the pressure plate 11. Connecting seats 21 are symmetrically slidably installed on the inner wall of the pressure plate 11. Each connecting seat 21 is fixedly connected to the extrusion plate 20. An extension plate 22 is fixedly installed on the outer wall of each connecting seat 21. An elastic element C23 is fixedly installed between the extension plate 22 and the pressure plate 11. A limit component is provided on the top of the water tank 2. After the placement frame 9 moves the polyurethane material out of the water tank 2 and completes the testing, the drive motor 5 continues to move the placement frame 9 upward. At this time, the limit component will limit the extension plate 22. 21 can no longer move the extrusion plate 20 upwards. As the placement frame 9 continues to move the polyurethane material upwards, since the extrusion plate 20 cannot move upwards and remain in the same position, the extrusion plate 20 will squeeze the polyurethane material from above. The extrusion of the extrusion plate 20 can squeeze out the water absorbed inside the polyurethane material. This extrusion method can simulate the scenario of removing water from the material in actual production or use, effectively squeezing out the water absorbed by the polyurethane material during the water absorption process, and providing convenient conditions for subsequent drying, further processing or performance analysis of the material.

[0039] like Figure 3 and Figure 6As shown, the limiting component includes a positioning bracket 24. Two positioning brackets 24 are symmetrically and fixedly installed on the top of the water tank 2. Positioning plates 25 are fixedly installed on the horizontal sections of the positioning brackets 24, and the positioning plates 25 are respectively located above the extension plates 22. The positioning plates 25 are fixed to the water tank 2 through the positioning brackets 24, so that the two positioning plates 25 are respectively located above the two extension plates 22. When the polyurethane material has finished absorbing water, the placement frame 9 will drive the polyurethane material to move upward. During this process, the connecting seat 21 drives the extrusion plate 20 to move upward under the action of the extension plate 22 and the elastic element C23 until the extension plate 22 and the positioning plate 25 are in contact. When the detection work is completed, the placement frame 9 continues to move upward. At this time, because the extension plate 22 is restricted by the positioning plate 25, the extrusion plate 20 cannot move upward. The elastic element C23 will shrink. The continued upward movement of the placement frame 9 will cause the extrusion plate 20 to squeeze the polyurethane material, thereby realizing the water squeezing work.

[0040] like Figures 7 to 8 As shown, a connecting frame 26 is fixedly installed on one side of the extrusion plate 20, and extrusion teeth B27 are fixedly installed between the connecting frames 26. The extrusion teeth B27 are located above the force-bearing teeth 17. When the placement frame 9 moves upward to perform the water squeezing operation, since the extrusion plate 20 will no longer move upward, the extrusion teeth B27 connected to the extrusion plate 20 through the connecting frames 26 will also stop moving. When the placement frame 9 moves upward, it will drive the force-bearing teeth 17 to move upward through the side plate 16. When the force-bearing teeth 17 move upward, they will successively abut against the extrusion teeth B27. The abutment of the extrusion teeth B27 will cause the placement frame 9 to move back and forth. When the placement frame 9 moves, it will drive the polyurethane material to move, and while squeezing the polyurethane material, it will also cause the polyurethane material to move. The reciprocating movement of the polyurethane material allows the extrusion pressure of the extrusion plate 20 to be applied more evenly to various parts of the material. During the reciprocating motion, different parts of the material are squeezed in turn, avoiding local over-squeezing or under-squeezing, thereby improving the uniformity of water extrusion and ensuring that the water inside the material can be more effectively discharged. In each reciprocating movement, the extrusion plate 20 performs a new extrusion on the material, which is equivalent to multiple repeated extrusion processes. This multiple extrusion can more deeply destroy the water adsorption structure inside the material, making it easier for water to separate from the material, thereby significantly enhancing the water squeezing effect and improving the dryness of the material.

[0041] like Figures 2 to 7 and Figure 10As shown, air guide pipes 28 are fixedly installed on the inner walls of the connecting columns 8, and diversion pipes 30 are symmetrically fixedly installed on the inner walls of the connecting columns 8. The diversion pipes 30 are connected to the air guide pipes 28, and a one-way valve 31 is fixedly installed at one end of the diversion pipe 30. A hot air blower 32 is fixedly installed on the back of the lifting guide rail 3. Two connecting hoses 33 are fixedly installed on the inner wall of the hot air blower 32, and one end of each connecting hose 33 is connected to one end of the air guide pipe 28. When the squeezing and drainage work is completed, the placement frame 9 is reset. At this time, the hot air blower 32 is started to draw in external air, heat it, and deliver it to the air guide pipe 28 through the connecting hoses 33. After the airflow enters the air duct 28, it will be diverted through the splitter pipe 30 and finally sprayed out through the one-way valve 31. The warm air sprayed out through the one-way valve 31 will blow towards the polyurethane material. The warm air will continue to blow towards the surface of the polyurethane material, accelerating the evaporation of moisture on the material surface. At the same time, the heat of the warm air will gradually penetrate into the interior of the material, causing the internal moisture to be heated and vaporized and discharged with the airflow, thereby achieving the complete drying of the polyurethane material. Through "water absorption - water squeezing - air drying", a complete polyurethane material processing flow is formed, which greatly improves the practicality and comprehensiveness of the device and meets the needs of different production stages for polyurethane material processing.

[0042] like Figures 1 to 2 As shown, a drain pipe 34 is fixedly installed at the bottom of the water tank 2. One end of the drain pipe 34 passes through the workbench 1 and is threaded with a drain valve 35. A support base 36 is fixedly installed between the workbench 1 and the lifting guide rail 3. Several support legs 37 are fixedly installed at the bottom of the workbench 1. By opening the drain valve 35, the water inside the water tank 2 is discharged through the drain pipe 34, which facilitates the water replacement work of the water tank 2. The lifting guide rail 3 is fixed to the workbench 1 through the support base 36 to ensure the stability of the lifting guide rail 3. The support legs 37 support the entire device to ensure the stability of the entire device.

[0043] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting water absorption of polyurethane materials, comprising a worktable (1), characterized in that: The top of the workbench (1) is fixedly provided with a water tank (2), the water tank (2) is made of transparent material, the outer wall of the water tank (2) is provided with a scale table, the upper portion of the workbench (1) is provided with a lifting guide rail (3), the inner wall of the lifting guide rail (3) is rotatably provided with a traveling screw (4), the top of the lifting guide rail (3) is fixedly provided with a driving motor (5), the output end of the driving motor (5) is fixedly connected with one end of the traveling screw (4), the inner wall of the lifting guide rail (3) is slidably provided with a lifting seat (6), the inner wall of the lifting seat (6) is threadedly connected with the outer wall of the traveling screw (4), and the outer wall of the lifting seat (6) is provided with a material placing assembly.

2. The water absorption detection device for polyurethane material according to claim 1, characterized in that: The material placing assembly comprises a lifting plate (7) which is fixedly installed on the outer wall of the lifting seat (6), the inner wall of the lifting plate (7) is symmetrically fixedly provided with a connecting column (8), the ends of the connecting column (8) away from the lifting plate (7) are provided with a placing frame (9), and the inner wall of the placing frame (9) is fixedly provided with a plurality of cross rods (10).

3. The water absorption detection device of polyurethane material according to claim 2, characterized in that: The outer wall of the connecting column (8) is slidably provided with a pressing plate (11), the top of the pressing plate (11) and the bottom of the lifting plate (7) are symmetrically fixedly provided with elastic members A (12), and the elastic members A (12) are respectively sleeved on the outer sides of the connecting column (8).

4. The water absorption detection device of polyurethane material according to claim 3, characterized in that: The top of the placing frame (9) is fixedly provided with a limiting plate (13), the placing frame (9) is slidably connected with the connecting column (8) through the limiting plate (13), the top of the placing frame (9) is symmetrically fixedly provided with a supporting plate (14), the supporting plates (14) on the same side are fixedly provided with elastic members B (15) between the connecting column (8), and one side of the placing frame (9) is provided with a squeezing assembly.

5. The water absorption detection device of polyurethane material according to claim 4, characterized in that: The squeezing assembly comprises a side plate (16) which is fixedly installed on one side of the placing frame (9), a plurality of stress teeth (17) are fixedly installed on the side of the side plate (16) away from the placing frame (9), an extension block (18) is fixedly installed on one side of the inner wall of the water tank (2), a squeezing tooth A (19) is fixedly installed on the outer wall of the extension block (18), and the squeezing tooth A (19) is located below the stress tooth (17).

6. The water absorption detection device of polyurethane material according to claim 5, characterized in that: The lower portion of the pressing plate (11) is symmetrically provided with a squeezing plate (20), the inner wall of the pressing plate (11) is symmetrically slidably provided with a connecting seat (21), the connecting seats (21) are fixedly connected with the squeezing plate (20), the outer wall of the connecting seat (21) is fixedly provided with an extension plate (22), and the extension plate (22) and the pressing plate (11) are fixedly provided with elastic members C (23) therebetween.

7. The water absorption detection device of polyurethane material according to claim 6, characterized in that: The limiting assembly comprises a positioning support (24), two positioning supports (24) are symmetrically fixedly installed on the top of the water tank (2), the horizontal sections of the positioning supports (24) are fixedly provided with positioning plates (25), and the positioning plates (25) are respectively located above the extension plates (22).

8. The water absorption detection device of polyurethane material according to claim 6, characterized in that: One side of the extrusion plate (20) is fixedly installed with connecting frame (26), the connecting frame (26) between fixedly installed with extrusion teeth B (27), the extrusion teeth B (27) are located above the stress tooth (17).

9. The water absorption detection device of polyurethane material according to claim 2, characterized in that: The inner wall of the connecting column (8) is fixedly installed with the air guide pipe (28), the inner wall of the connecting column (8) is fixedly installed with the shunt pipe (30) symmetrically, the shunt pipe (30) is communicated with the air guide pipe (28), one end of the shunt pipe (30) is fixedly installed with the check valve (31), the back of the lifting guide rail (3) is fixedly installed with the hot air machine (32), the inner wall of the hot air machine (32) is fixedly installed with two connecting hoses (33), one end of the connecting hose (33) is respectively communicated with one end of the air guide pipe (28).

10. The water absorption detection device of polyurethane material according to claim 1, characterized in that: The bottom of the water tank (2) is fixedly installed with the drain pipe (34), one end of the drain pipe (34) penetrates the workbench (1) and is threadedly installed with the drain valve (35), the workbench (1) and the lifting guide rail (3) are fixedly installed with the support seat (36), the bottom of the workbench (1) is fixedly installed with a plurality of supporting legs (37).

Images