Moisture permeability detection mechanism for composite waterproof fabric

Abstract

The invention relates to the technical field of new material composite water-blocking fabric detection, and provides a moisture permeability detection mechanism for a composite water-blocking fabric, which comprises a measuring cup and a sealing sleeve, the top end of the measuring cup is provided with a sealing sleeve, and the top end of the sealing sleeve is provided with a pressure release valve. When moisture permeability detection is carried out, steam flows in the air inlet pipe to drive the blades to rotate, the blades rotate through the reciprocating screw rod and the screw sleeve in the rotating process so as to drive the drying agent to slowly reciprocate in the sealing sleeve, and when the drying agent moves downwards, the lower end of the drying agent is arranged to be in a slightly-protruding cone shape, so that moisture permeability detection is carried out. The central area of the columnar steam is actively impacted by a conical scattered and concentrated steam column with a slightly raised bottom end, and the steam is forced to diffuse to the periphery because the mounting shell is slightly attached to the sealing sleeve, the steam cannot escape from a gap and can only permeate to the side surface of the drying agent, so that the drying agent is more uniform when absorbing the steam, the absorption effect is better, and the service life of the drying agent is prolonged. And the detection data is more accurate.

Description

Technical Field

[0001] This invention relates to the field of new material composite water-resistant fabric testing technology, and in particular to a moisture permeability testing mechanism for composite water-resistant fabrics. Background Technology

[0002] New material composite water-resistant fabric refers to a new type of fabric that combines two or more materials with different properties through a composite process to form a fabric with a high efficiency in preventing liquid water penetration. New material composite water-resistant fabric is mostly used in outdoor jackets, ski suits, etc. Outdoor jackets and ski suits are generally used in cold, rainy and snowy environments, which places certain requirements on composite water-resistant fabrics. The composite fabric must be able to prevent external rain and snow from penetrating when worn in cold, rainy and snowy environments, while allowing heat and vapor emitted by the body inside to permeate out. Therefore, after the new material composite water-resistant fabric is produced, it needs to be tested for moisture permeability, which requires the use of a moisture permeability testing agency. Traditional moisture permeability testing agencies typically employ the moisture absorption method, which only allows gaseous vapor to pass through the fabric. Moisture permeability data is measured by assessing the change in the weight gain of the desiccant. The traditional method involves directly attaching the desiccant to the top of the fabric. This causes vapor to tend to accumulate at the center of the desiccant at the bottom when it passes through the fabric. The central area of ​​the desiccant absorbs a large amount of vapor and reaches saturation first, while the desiccant at the edges remains underutilized, affecting the test data. Therefore, a moisture permeability testing agency using composite water-resistant fabric is needed to solve the above problems. Summary of the Invention

[0003] The purpose of this invention is to provide a moisture permeability testing mechanism for composite water-resistant fabrics, which solves the problem that existing moisture permeability testing mechanisms for composite water-resistant fabrics directly install the desiccant on the top of the fabric during testing. This causes steam to easily accumulate at the center of the bottom of the desiccant when it passes through the fabric. The desiccant in the central area absorbs a large amount of steam in a short time and reaches saturation first, while the desiccant at the edges is not fully utilized, affecting the test data.

[0004] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a moisture permeability testing mechanism for composite water-resistant fabric, comprising a measuring cup and a sealing sleeve; The measuring cup has a sealing sleeve at the top, a pressure relief valve at the top of the sealing sleeve, an air inlet pipe at the bottom, and an auxiliary structure on one side. The auxiliary structure includes a mounting plate mounted on one side of the measuring cup. A connecting shaft is mounted on the top of the mounting plate, and a reciprocating lead screw is mounted on the top of the connecting shaft. A threaded sleeve is mounted on the outer side of the reciprocating lead screw. A mounting shell is installed inside the sealing sleeve, and a desiccant is installed inside the mounting shell. A vent groove is mounted on the top of the mounting shell. A threaded sleeve is mounted on the outer side of the reciprocating lead screw, and a connecting frame is mounted on one side of the threaded sleeve. The top of the mounting shell is connected to one end of the connecting frame. A support frame is mounted on one side of the top of the mounting plate. A guide groove is opened inside one side of the support frame, and a guide block is installed inside the guide groove. One end of the guide block is connected to the outer side of the threaded sleeve. A rotating shaft is mounted on the bottom of the connecting shaft. The bottom of the rotating shaft is inserted into the air inlet pipe, and blades are mounted on the outer side of the bottom of the rotating shaft.

[0005] Preferably, the guide block slides inside the guide groove, and the guide block and the guide groove form a guide connection.

[0006] Preferably, the blades are provided in multiple sets, and the multiple sets of blades are arranged in a ring at the bottom end of the rotating shaft.

[0007] Preferably, an air outlet pipe is installed on one side of the top of the support frame, a driven synchronizing pulley is installed at the bottom of the air outlet pipe, an installation shaft is installed at the top of the reciprocating screw, a main synchronizing pulley is installed on the outside of the installation shaft, a fan blade head is installed at the top of the driven synchronizing pulley, a connecting pipe is installed at the top of the air outlet pipe, and a blower head is installed at one end of the connecting pipe.

[0008] Preferably, the threaded sleeve is fitted onto the outside of the reciprocating lead screw, and the threaded sleeve and the reciprocating lead screw form a threaded connection.

[0009] Preferably, an air vent plate is installed at the bottom of the measuring cup, and the surface of the air vent plate has small holes. A sealing structure is provided at the connection between the measuring cup and the sealing sleeve.

[0010] Preferably, the sealing structure includes a sealing seat, which is fixed to the outside of the top of the measuring cup. A sealing cap is installed on the top of the measuring cup. A second sealing groove is opened on the top of the measuring cup. A fabric is placed on the top of the second sealing groove. A second sealing ring is installed on the top of the inside of the sealing cap. A first sealing ring is installed on the top of the sealing seat. A first sealing groove is opened inside the bottom of the sealing cap. The top of the sealing cap is fixed to the bottom of the sealing sleeve.

[0011] Preferably, the inner side of the sealing cap is provided with an internal thread, and the outer side of the top of the measuring cup is provided with an external thread, and the sealing cap and the measuring cup form a threaded connection.

[0012] Preferably, the second sealing ring is inserted into the interior of the second sealing groove by pressing the fabric, and a sealing connection is formed between the second sealing ring and the second sealing groove.

[0013] Preferably, the small holes are provided in multiple sets, and the multiple sets of small holes are circumferentially distributed on the surface of the air outlet plate.

[0014] The present invention provides a moisture permeability testing mechanism for composite water-resistant fabrics, which has the following advantages: With the addition of an auxiliary structure, during moisture permeability testing, the steam flowing inside the inlet pipe drives the blades to rotate. As the blades rotate, the reciprocating screw and sleeve rotate, causing the desiccant to slowly reciprocate inside the sealing sleeve. As the desiccant moves downwards, its slightly convex lower end actively impacts the central area of ​​the columnar steam, effectively breaking up the concentrated steam column and forcing it to diffuse outwards. Because the mounting shell and sealing sleeve are in close contact, the steam cannot escape through the gaps and can only permeate to the sides of the desiccant. This results in more uniform absorption of steam by the desiccant, better absorption, and more accurate test data. Furthermore, this impact-type absorption makes it easier for steam to pass through the pores of the desiccant, and this impact action relies entirely on steam-driven power, requiring no additional energy consumption and reducing the cost of use. Furthermore, when the reciprocating screw rotates, it drives the main synchronous pulley to rotate via the mounting shaft. The main synchronous pulley, in turn, drives the fan blade head to rotate via the synchronous pulley, causing airflow. This air enters the blow-in connecting pipe through one side of the outlet pipe and then blows out through the blow-out head. The air quickly passes through the top of the sealing sleeve, carrying away the heat at the top. This makes the inner wall temperature of the sealing sleeve top slightly lower than the internal steam temperature. Through the temperature difference between the top of the sealing sleeve and the steam, the unabsorbed moisture condenses into water droplets, which fall onto the top of the desiccant and are absorbed by the desiccant. By the reciprocating downward movement of the desiccant and the condensation of residual steam using the temperature difference, the moisture absorption efficiency of the desiccant for steam is greatly improved, resulting in better and faster absorption during moisture permeability testing. By incorporating a sealing structure, when performing moisture permeability testing on the fabric, the initial sealing is achieved through the cooperation of the second sealing ring and the second sealing groove. Furthermore, the first sealing ring is inserted into the first sealing groove for a second sealing, thus completing multiple sealing operations on the fabric. This prevents steam from leaking out from the connection between the sealing cap and the measuring cup when passing through the fabric, thus preventing steam leakage from affecting the test data and completing the multiple sealing installation work on the fabric. Attached Figure Description

[0015] Figure 1 This is a frontal three-dimensional structural schematic diagram of the present invention; Figure 2This is a three-dimensional structural diagram of the present invention viewed from below; Figure 3 This is a frontal cross-sectional three-dimensional structural schematic diagram of the present invention; Figure 4 for Figure 3 A magnified view of the structure at point A in the middle; Figure 5 This is a three-dimensional structural diagram of the present invention viewed from below. Figure 6 This is a frontal view of the three-dimensional structure of the partial explosion of the present invention; Figure 7 This is a three-dimensional structural diagram of the partial explosion from a low angle, representing the present invention. Figure 8 This is a frontal three-dimensional structural schematic diagram of the auxiliary mechanism of the present invention; Figure 9 This is a top-view three-dimensional structural diagram of the mounting bracket of the present invention; Figure 10 This is a frontal view of a partial three-dimensional structural diagram of the auxiliary mechanism of the present invention; Figure 11 for Figure 10 A magnified schematic diagram of the structure at point B in the middle.

[0016] The reference numerals in the diagram are as follows: 1. Measuring cup; 2. Sealing structure; 201. Sealing seat; 202. Sealing cap; 203. First sealing ring; 204. First sealing groove; 205. Second sealing ring; 206. Second sealing groove; 207. Fabric; 3. Sealing sleeve; 4. Pressure relief valve; 5. Auxiliary structure; 501. Connecting frame; 502. Support frame; 503. Guide groove; 504. Reciprocating lead screw; 505. Connecting shaft; 5 06. Mounting plate; 507. Rotating shaft; 508. Blade; 509. Desiccant; 5010. Mounting housing; 5011. Vent groove; 5012. Threaded sleeve; 5013. Blowout head; 5014. Connecting pipe; 5015. Mounting shaft; 5016. Main timing pulley; 5017. Fan blade head; 5018. Driven timing pulley; 5019. Guide block; 5020. Air outlet pipe; 6. Air inlet pipe; 7. Air outlet plate; 8. Small hole. Detailed Implementation

[0017] 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.

[0018] Please see Figures 1-11The present invention provides a moisture permeability testing mechanism for composite water-resistant fabric, comprising a measuring cup 1 and a sealing sleeve 3; A sealing sleeve 3 is provided at the top of the measuring cup 1, a pressure relief valve 4 is provided at the top of the sealing sleeve 3, an air inlet pipe 6 is installed at the bottom of the measuring cup 1, and an auxiliary structure 5 is provided on one side of the measuring cup 1. An air vent plate 7 is installed at the bottom of the measuring cup 1. The surface of the air vent plate 7 has small holes 8. A sealing structure 2 is provided at the connection between the measuring cup 1 and the sealing sleeve 3.

[0019] Reference Figures 1-7 As shown, the sealing structure 2 includes a sealing seat 201, which is fixed to the outside of the top of the measuring cup 1. A sealing cover 202 is installed on the top of the measuring cup 1. A second sealing groove 206 is opened on the top of the measuring cup 1. A fabric 207 is placed on the top of the second sealing groove 206. A second sealing ring 205 is installed on the top of the inside of the sealing cover 202. A first sealing ring 203 is installed on the top of the sealing seat 201. A first sealing groove 204 is opened on the inside of the bottom of the sealing cover 202. The top of the sealing cover 202 is fixed to the bottom of the sealing sleeve 3. The inner side of the sealing cap 202 is provided with an internal thread, and the outer side of the top of the measuring cup 1 is provided with an external thread, forming a threaded connection between the sealing cap 202 and the measuring cup 1; the second sealing ring 205 squeezes the fabric 207 into the interior of the second sealing groove 206, forming a sealing connection between the second sealing ring 205 and the second sealing groove 206; multiple sets of small holes 8 are provided, and the multiple sets of small holes 8 are circumferentially distributed on the surface of the air outlet plate 7.

[0020] When performing a moisture permeability test on fabric 207, fabric 207 is first placed on top of measuring cup 1. After placement, sealing cap 202 is placed on top of measuring cup 1 and rotated. As sealing cap 202 rotates with measuring cup 1, it moves downward at the top of measuring cup 1, squeezing fabric 207 and fixing it between measuring cup 1 and sealing cap 202. As sealing cap 202 moves downward, it also moves second sealing ring 205 downward, squeezing fabric 207 into the interior of second sealing groove 206, completing the initial seal. As sealing cap 202 continues to move downward, first sealing ring 203 is inserted into the interior of first sealing groove 204 for a second seal, thus completing the multiple sealing work on fabric 207. This prevents steam from leaking from the connection between sealing cap 202 and measuring cup 1 when passing through fabric 207, preventing steam leakage from affecting the test data, thus completing the multiple sealing installation work on fabric 207.

[0021] Reference Figures 1-3 and Figures 5-11As shown, the auxiliary structure 5 includes a mounting plate 506, which is mounted on one side of the measuring cup 1. A connecting shaft 505 is mounted on the top of the mounting plate 506, and a reciprocating lead screw 504 is mounted on the top of the connecting shaft 505. A threaded sleeve 5012 is mounted on the outside of the reciprocating lead screw 504. A mounting shell 5010 is installed inside the sealing sleeve 3, and a desiccant 509 is installed inside the mounting shell 5010. A vent groove 5011 is mounted on the top of the mounting shell 5010. The reciprocating lead screw 5012... A threaded sleeve 5012 is installed on the outer side of the mounting plate 506. A connecting bracket 501 is installed on one side of the threaded sleeve 5012. The top of the mounting shell 5010 is connected to one end of the connecting bracket 501. A support bracket 502 is installed on one side of the top of the mounting plate 506. A guide groove 503 is opened inside one side of the support bracket 502. A guide block 5019 is installed inside the guide groove 503. One end of the guide block 5019 is connected to the outer side of the threaded sleeve 5012. A rotating shaft is installed at the bottom end of the connecting shaft 505. 507, the bottom end of the rotating shaft 507 is inserted into the interior of the intake pipe 6, and blades 508 are installed on the outer side of the bottom end of the rotating shaft 507; guide block 5019 slides inside guide groove 503, and guide block 5019 and guide groove 503 form a guide connection; multiple sets of blades 508 are provided, and multiple sets of blades 508 are arranged in a ring at the bottom end of the rotating shaft 507; an exhaust pipe 5020 is installed on one side of the top of the support frame 502, and a blade is installed at the bottom end inside the exhaust pipe 5020. A mounting shaft 5015 is installed at the top of the reciprocating screw 504 from the synchronous pulley 5018. A main synchronous pulley 5016 is installed on the outside of the mounting shaft 5015. A fan blade head 5017 is installed at the top of the synchronous pulley 5018. A connecting pipe 5014 is installed at the top of the air outlet pipe 5020. A blower head 5013 is installed at one end of the connecting pipe 5014. A threaded sleeve 5012 is sleeved on the outside of the reciprocating screw 504, and a threaded connection is formed between the threaded sleeve 5012 and the reciprocating screw 504.

[0022] After the fabric 207 is installed, connect the air inlet pipe 6 to the steam, so that the steam is delivered to the inside of the air outlet plate 7 through the air inlet pipe 6. Since the inner diameter of the air outlet plate 7 is larger than the inner diameter of the air inlet pipe 6, the flow rate of the steam will slow down after entering the inside of the air outlet plate 7, so that the steam is buffered and discharged into the measuring cup 1 through the small hole 8, and then the steam penetrates the inside of the fabric 207 and drifts into the inside of the sealing sleeve 3 to be absorbed by the desiccant 509. When steam flows inside the intake pipe 6, it drives the blades 508 to rotate. During this rotation, the blades 508 drive the connecting shaft 505 to rotate via the rotating shaft 507. The connecting shaft 505, in turn, drives the reciprocating screw 504 to rotate. The reciprocating screw 504, in turn, drives the threaded sleeve 5012 to rotate. Because the guide block 5019 on one side of the threaded sleeve 5012 is inserted into the guide groove 503, it guides the threaded sleeve 5012, causing it to move up and down reciprocally outside the reciprocating screw 504. During this reciprocating movement, the threaded sleeve 5012, through the cooperation of the connecting bracket 501 and the mounting shell 5010, drives the desiccant 509 to move within the sealing sleeve 3. The internal reciprocating motion creates a columnar airflow that is dense in the center and sparse around the edges as the steam flows upward. Static desiccant 509 can only passively absorb the central steam, and leakage is likely to occur on the sides and edges. Therefore, as desiccant 509 moves downward, its slightly convex cone shape at the bottom actively impacts the central area of ​​the columnar steam, effectively breaking up the concentrated steam column and forcing the steam to diffuse outward. Because the mounting shell 5010 and the sealing sleeve 3 are in close contact, the steam cannot escape through the gaps and can only penetrate to the sides of the desiccant. This makes the desiccant 509 absorb steam more evenly, resulting in better absorption and more accurate detection data. This impact-type absorption makes it easier for steam to pass through the pores of the desiccant 509. Furthermore, this impact action is entirely powered by steam, requiring no additional energy consumption and reducing operating costs. When the reciprocating screw 504 rotates, it drives the main synchronous pulley 5016 via the mounting shaft 5015. The main synchronous pulley 5016, in turn, drives the fan blade head 5017 via the synchronous pulley 5018, creating airflow. This air enters the blow-in connecting pipe 5014 through one side of the outlet pipe 5020 and is then blown out through the blow-out head 5013. The air quickly passes through the top of the sealing sleeve 3, carrying away its heat and making the inner wall temperature of the sealing sleeve 3 slightly lower than the internal steam temperature. This accelerates the condensation of steam at the top. When the steam passes through the desiccant 509, some moisture remains inside. Due to the temperature difference between the top of the sealing sleeve 3 and the steam, this unabsorbed moisture condenses into water droplets and drips onto the surface. The top of the desiccant 509 is absorbed by the desiccant 509. The top of the mounting shell 5010 is slightly tilted towards the middle, allowing water droplets falling on the surface to flow towards the desiccant 509. Through the reciprocating downward movement of the desiccant 509 and the condensation of residual steam by utilizing the temperature difference, the moisture absorption efficiency of the desiccant 509 for steam is greatly improved, making its absorption effect better and faster during moisture permeability testing. The pressure relief valve 4 is equipped with a hydrophobic and breathable membrane. When the pressure relief valve 4 is depressurized, the use of the hydrophobic and breathable membrane, with its high surface tension due to its hydrophobic properties, can completely block the passage of gaseous steam and liquid condensate, allowing only non-condensable gases to pass through. This, combined with the pressure relief valve 4, allows the steam to be discharged from the body, preventing data distortion due to steam leakage from affecting the test data. During testing, under the same time, the same effective area of ​​the fabric, and the same environmental conditions, the moisture permeability data of the fabric can be directly calculated by measuring the weight change of the desiccant and the amount of water absorbed, thus completing the moisture permeability test of the new material composite water-resistant fabric.

[0023] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A moisture permeability testing mechanism for composite water-resistant fabric, comprising a measuring cup (1) and a sealing sleeve (3). Its features are: The measuring cup (1) is provided with a sealing sleeve (3) at the top, a pressure relief valve (4) at the top of the sealing sleeve (3), an air inlet pipe (6) at the bottom of the measuring cup (1), and an auxiliary structure (5) on one side of the measuring cup (1). The auxiliary structure (5) includes a mounting plate (506), which is mounted on one side of the measuring cup (1). A connecting shaft (505) is mounted on the top of the mounting plate (506), and a reciprocating lead screw (504) is mounted on the top of the connecting shaft (505). A threaded sleeve (5012) is mounted on the outside of the reciprocating lead screw (504). A mounting shell (5010) is installed inside the sealing sleeve (3), and a desiccant (509) is installed inside the mounting shell (5010). A vent groove (5011) is mounted on the top of the mounting shell (5010). A threaded sleeve (5012) is mounted on the outside of the reciprocating lead screw (504). A connecting frame (501) is installed on one side of the mounting plate (506). The top of the mounting shell (5010) is connected to one end of the connecting frame (501). A support frame (502) is installed on one side of the top of the mounting plate (506). A guide groove (503) is opened inside one side of the support frame (502). A guide block (5019) is installed inside the guide groove (503). One end of the guide block (5019) is connected to the outside of the thread sleeve (5012). A rotating shaft (507) is installed at the bottom of the connecting shaft (505). The bottom of the rotating shaft (507) is inserted into the interior of the air intake pipe (6). A blade (508) is installed on the outside of the bottom of the rotating shaft (507).

2. The moisture permeability testing mechanism for a composite water-resistant fabric according to claim 1, characterized in that: The guide block (5019) slides inside the guide groove (503), and the guide block (5019) and the guide groove (503) form a guide connection.

3. The moisture permeability testing mechanism for a composite water-resistant fabric according to claim 1, characterized in that: The blades (508) are provided in multiple sets, and the multiple sets of blades (508) are arranged in a ring at the bottom end of the rotating shaft (507).

4. The moisture permeability testing mechanism for a composite water-resistant fabric according to claim 1, characterized in that: An air outlet pipe (5020) is installed on one side of the top of the support frame (502). A slave synchronous pulley (5018) is installed at the bottom of the inside of the air outlet pipe (5020). An installation shaft (5015) is installed at the top of the reciprocating screw (504). A master synchronous pulley (5016) is installed on the outside of the installation shaft (5015). A fan blade head (5017) is installed at the top of the slave synchronous pulley (5018). A connecting pipe (5014) is installed at the top of the air outlet pipe (5020). A blower head (5013) is installed at one end of the connecting pipe (5014).

5. The moisture permeability testing mechanism for a composite water-resistant fabric according to claim 1, characterized in that: The threaded sleeve (5012) is sleeved on the outside of the reciprocating lead screw (504), and the threaded sleeve (5012) and the reciprocating lead screw (504) form a threaded connection.

6. The moisture permeability testing mechanism for a composite water-resistant fabric according to claim 1, characterized in that: An air outlet plate (7) is installed at the bottom of the measuring cup (1). The surface of the air outlet plate (7) is provided with small holes (8). A sealing structure (2) is provided at the connection between the measuring cup (1) and the sealing sleeve (3).

7. The moisture permeability testing mechanism for a composite water-resistant fabric according to claim 6, characterized in that: The sealing structure (2) includes a sealing seat (201), which is fixed to the outside of the top of the measuring cup (1). A sealing cap (202) is installed on the top of the measuring cup (1). A second sealing groove (206) is opened on the top of the measuring cup (1). A fabric (207) is placed on the top of the second sealing groove (206). A second sealing ring (205) is installed on the top of the inside of the sealing cap (202). A first sealing ring (203) is installed on the top of the sealing seat (201). A first sealing groove (204) is opened inside the bottom of the sealing cap (202). The top of the sealing cap (202) is fixed to the bottom of the sealing sleeve (3).

8. The moisture permeability testing mechanism for a composite water-resistant fabric according to claim 7, characterized in that: The inner side of the sealing cap (202) is provided with an internal thread, and the outer side of the top of the measuring cup (1) is provided with an external thread, and the sealing cap (202) and the measuring cup (1) form a threaded connection.

9. The moisture permeability testing mechanism for a composite water-resistant fabric according to claim 7, characterized in that: The second sealing ring (205) squeezes the fabric (207) into the interior of the second sealing groove (206), and the second sealing ring (205) and the second sealing groove (206) form a sealed connection.

10. The moisture permeability testing mechanism for a composite water-resistant fabric according to claim 6, characterized in that: The small holes (8) are provided in multiple sets, and the multiple sets of small holes (8) are distributed in a circular pattern on the surface of the air outlet plate (7).

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