A water permeability detection device and method for waterproof textile fabric processing

Abstract

This invention discloses a device and method for testing the water permeability of waterproof textile fabrics, relating to the field of waterproof material testing technology. The water permeability testing device, relying on a reciprocating swing mechanism composed of a power component, levers, counterweights, and torsion springs, can simultaneously achieve pulse spraying, swing spraying, and fabric reciprocating stretching in a synchronized cycle. This realistically simulates the combined stress state of the fabric during wear, characterized by "rain washing combined with limb pulling," completely solving the problems of traditional static testing being disconnected from actual working conditions and data distortion. Through the mechanical pressurization of a pressure cylinder, piston, semi-circular block, and protrusion, the spray water pressure can be quickly adjusted by changing the counterweight, enabling precise switching between multiple rainfall intensities, including light rain, moderate rain, and heavy rain. Combined with the swing drive of the spray plate, the first half-gear, and the second half-gear, it simulates wind-blown oblique rainfall, making the testing environment closer to natural real-world conditions.

Description

Technical Field

[0001] This invention relates to the field of waterproof material testing technology, specifically to a device and method for testing the water permeability of waterproof textile fabrics. Background Technology

[0002] Waterproof textile fabrics are essential basic materials for outdoor clothing, protective equipment, and home textile products, and their water-repellent properties are a key indicator for product quality control. During production and quality inspection, specialized testing equipment is required to test the fabric's water resistance to ensure it meets usage requirements.

[0003] The waterproof knitted fabric testing box disclosed in patent application CN214150346U effectively tests the waterproofness of waterproof knitted fabrics, thereby ensuring the production quality of waterproof knitted fabrics.

[0004] The transformer fault diagnosis and monitoring equipment described above has the following drawbacks in practical use:

[0005] 1) Currently, most commonly used seepage detection devices in the industry mainly consist of fixed spray heads combined with static clamping structures. The spray direction and water pressure are relatively simple, making it difficult to reproduce the real state of different intensities and different scouring angles in natural rainfall. The detection conditions are somewhat different from the actual use environment.

[0006] 2) At the same time, these devices usually cannot apply dynamic stretching to the fabric, and cannot simulate the repeated stretching and deformation of the fabric caused by limb movement during wear. As a result, the test results reflect more static waterproofing ability and are not consistent with the actual use effect.

[0007] Therefore, the present invention proposes a device and method for testing the water permeability of waterproof textile fabrics to solve the above problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a device and method for testing the water permeability of waterproof textile fabrics. It solves the problems of commonly used water permeability testing devices in the industry, which mostly employ fixed spraying and static clamping, resulting in a single spray direction and water pressure, making it difficult to replicate different rainfall intensities and scouring angles, and causing discrepancies between the testing conditions and actual usage environments. Furthermore, these devices cannot dynamically stretch the fabric, cannot simulate the repeated stretching and deformation during wear, and the test results only reflect static waterproof performance, resulting in insufficient matching with real-world usage effects.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a water permeability testing device for processing waterproof textile fabrics, comprising a base and four columns fixedly disposed at the four corners of its top, the top of the four columns being fixedly disposed on a top plate, and further comprising:

[0010] The water collection component is located on the top of the base and is used to adaptively adjust the opening size of the water collection opening according to the test width of the waterproof textile fabric to be tested, so that the water collection opening accurately covers the entire projected area of ​​the waterproof textile fabric to be tested.

[0011] The spray testing mechanism is set above the clean water collection component. It is used to dynamically spray clean water with regular pulse water pressure onto the waterproof textile fabric to be tested, so as to simulate the waterproof performance of the waterproof textile fabric under rain and uniform water flow in a real environment. By switching different pulse water pressure amplitudes, it can quickly switch between multiple rain intensity testing modes and simulate the actual rinsing state of oblique wind blowing rain under natural rainfall conditions.

[0012] The fabric stretching and clamping mechanism is located between the clean water collection component and the spray testing mechanism. It is used to flatten and clamp the waterproof textile fabric to be tested and position it at the center of the testing station. The fabric stretching and clamping mechanism and the spray testing mechanism form a transmission linkage. During the testing operation, the fabric stretching and clamping mechanism can be driven to reciprocate the stretching deformation of the waterproof textile fabric to be tested.

[0013] Furthermore, the water collection assembly includes a water storage tank fixed to the top of the base. A drain pipe is fixedly connected to the side wall of the water storage tank. The drain pipe is used to discharge the seepage water collected inside the water storage tank to the outside. The outlet end of the drain pipe is connected to an external measuring cylinder. First cross-shaped slide rails are fixedly installed on the left and right sides of the top of the water storage tank. A first isolation plate and a second isolation plate are symmetrically slidably mounted on the two first cross-shaped slide rails. Connecting rods are fixedly provided on the top of the first isolation plate and the second isolation plate, respectively.

[0014] Furthermore, the spray testing mechanism includes a support frame that is simultaneously fixed on the outer wall of four columns. A second cross-shaped slide rail is fixedly installed on both sides of the top of the support frame. A bidirectional screw is rotatably installed on the top of the support frame, located between the two second cross-shaped slide rails, via a bracket. A first clamping component and a second clamping component are slidably fitted onto the outer walls of the two second cross-shaped slide rails respectively. The top ends of the two connecting rods are respectively connected to the bottom center positions of the first and second clamping components. The first and second clamping components are threadedly fitted onto the positive and negative thread sections of the bidirectional screw. The bidirectional screw drives the first and second clamping components to move closer or further apart synchronously via a linkage unit, thereby completing the stretching and releasing operation of the waterproof textile fabric.

[0015] Furthermore, the linkage unit includes a third cross-shaped slide rail, which is fixedly installed on the outer wall of the column via two sets of support arms. The upper and lower ends of the third cross-shaped slide rail are respectively fixed with guide sleeves and a base plate. Two guide wheels are rotatably assembled inside the guide sleeve. A rack is slidably fitted on the side of the third cross-shaped slide rail near the bidirectional screw. A lifting rod is fixedly connected to the bottom end of the rack. The lower end of the lifting rod slides through the base plate and is fixedly fitted with a spring baffle. A return spring is slidably fitted on the outer wall of the lifting rod between the base plate and the spring baffle. A steel wire rope is also fixedly connected to the top end of the rack. The steel wire rope passes through the guide sleeve and is guided by the guide wheels before extending outward.

[0016] The outer wall of the bidirectional screw is fixedly fitted with a gear that meshes with the rack. The outer side of the third cross-shaped slide rail is covered with a protective cover. The protective cover is detachably fixed to the outer wall of the support arm by bolts. The contact position between the bidirectional screw and the protective cover is installed by a bearing rotational fit.

[0017] Furthermore, the No. 1 clamping assembly and the No. 2 clamping assembly have the same structure. The No. 1 clamping assembly includes a lower clamping plate and a first sliding sleeve fixedly disposed on both sides of the bottom of the lower clamping plate. The two first sliding sleeves are respectively slidably sleeved on the outer wall of the second cross-shaped slide rail at corresponding positions. A threaded sleeve is also fixedly disposed at the bottom middle position of the lower clamping plate. The threaded sleeve is sleeved on one side of the outer wall of the bidirectional screw. Guide rods are fixedly disposed on both sides of the top of the lower clamping plate. An upper clamping plate is slidably sleeved on the outer wall of the two guide rods. Rubber anti-slip pads are fixedly disposed on the opposite side walls of the upper clamping plate and the lower clamping plate. A lead screw is also rotatably disposed at the top middle position of the lower clamping plate. The lead screw thread passes through the upper clamping plate and extends to the outside.

[0018] Furthermore, the fabric stretching and clamping mechanism includes two second sliding sleeves symmetrically arranged front and rear. The two second sliding sleeves are respectively fixedly mounted on columns at corresponding positions. A spray plate is slidably mounted on the opposite sidewalls of the two second sliding sleeves. A second half gear is fixedly mounted at the top center of the spray plate. A clean water storage component is fixedly mounted inside the top plate and directly above the spray plate. The clean water storage component and the spray plate are connected by a water supply hose. A power component for driving the spray plate to spray water onto the waterproof textile fabric to be tested in a swinging manner is also provided between the spray plate and the clean water storage component.

[0019] Furthermore, the water storage assembly includes a water storage tank and a transparent observation window disposed on its outer wall. A pressure balancing pipe is fixedly disposed on the top of the water storage tank, and a one-way valve that only allows external air to enter is fixedly disposed inside the pressure balancing pipe. The surface of the transparent observation window is provided with scale lines for displaying the liquid level. A pressure boosting cylinder connected to the bottom of the water storage tank is fixedly disposed at the bottom. A piston is slidably disposed inside the pressure boosting cylinder, and a push rod is fixedly disposed at the bottom of the piston. The bottom end of the push rod slides through the pressure boosting cylinder and is fixedly disposed with a semi-circular block. A spring is slidably sleeved on the outer wall of the push rod between the semi-circular block and the bottom of the pressure boosting cylinder.

[0020] Furthermore, the power assembly includes two hangers fixedly installed on the front and rear sides of the bottom of the top plate. A support rod is fixedly installed on the opposite side walls of the two hangers. A lever is rotatably sleeved on the outer wall of the support rod. A protrusion for pushing the semicircular block upward is fixedly installed on one side of the top of the lever. A first half gear that meshes with the second half gear is fixedly installed at the middle position of the bottom of the lever. A torsion spring is installed between the lever and the support rod to drive the lever to return to its original position after deviating from the horizontal state. A lifting ring is also fixedly installed at the bottom of one end of the lever. A counterweight is detachably installed at the bottom of the lifting ring. A wire rope fixing ring is fixedly installed at the other end of the lever.

[0021] This invention also discloses a method for testing the water permeability of waterproof textile fabrics, and a device for testing the water permeability of waterproof textile fabrics. The method includes the following steps:

[0022] Step 1: Using the base, column, and top plate as support references, the waterproof textile fabric to be tested is flattened, clamped, and positioned using the fabric stretching and clamping mechanism.

[0023] Step 2: After the fabric is clamped, the suspended counterweight triggers the linkage, driving the spray detection mechanism and the fabric stretching clamping mechanism into the linkage working state.

[0024] Step 3: The spray testing mechanism achieves dynamic pulse spraying and position adjustment under the linkage, while the fabric stretching and clamping mechanism reciprocates to stretch the fabric to simulate the actual wearing and stretching conditions.

[0025] Step 4: The water collection component synchronously and adaptively matches the fabric width, completely collects the sprayed water, and completes quantitative measurement to achieve waterproof and seepage performance testing under multiple working conditions.

[0026] This invention provides a device and method for testing the water permeability of waterproof textile fabrics. Compared with the prior art, it has the following advantages:

[0027] 1. A device and method for testing the water permeability of waterproof textile fabrics, which, by relying on a reciprocating swing mechanism consisting of a power component, lever, counterweight, and torsion spring, can simultaneously realize the synchronous cyclic operation of three actions: pulse spraying, swing spraying, and reciprocating stretching of the fabric. This truly simulates the composite stress state of the fabric during wear, which is "combined with rain washing and limb pulling," and completely solves the problems of disconnection between traditional static testing and actual working conditions, and data distortion.

[0028] 2. A device and method for testing the water permeability of waterproof textile fabrics, which uses a mechanical pressurization mechanism consisting of a pressurizing cylinder, piston, semicircular block, and protrusion. The spray water pressure can be quickly adjusted by changing the counterweight, enabling precise switching between multiple rainfall intensities, including light rain, moderate rain, and heavy rain. Combined with the oscillating drive of the spray plate, the first half gear, and the second half gear, it simulates wind-blown oblique rainfall, making the testing environment closer to the real natural scene.

[0029] 3. A device and method for testing the water permeability of waterproof textile fabrics, wherein, under the linkage transmission of steel wire rope, rack, gear, and bidirectional screw, the first clamping component and the second clamping component can move back and forth periodically in opposite directions or in opposite directions along the second cross-shaped slide rail, continuously stretching and releasing the fabric, highly replicating the stretching, squeezing, and deformation state of the body when the clothing is worn, making the waterproof test results more valuable for engineering applications.

[0030] 4. A device and method for testing the water permeability of waterproof textile fabrics. A bidirectional screw drives the first and second isolation plates to move along the first cross-shaped slide rail synchronously via a connecting rod, ensuring that the clamping opening and the water collection opening always perfectly coincide with the width of the fabric to be tested. No manual adjustment or tooling changes are required, making it compatible with different widths of textile fabrics and significantly improving the device's versatility. Furthermore, the upper and lower clamping plates, combined with a rubber anti-slip structure, achieve uniform clamping under the drive of the screw and guide rod, preventing slippage and damage to the fabric fibers. This is suitable for various waterproof textile materials such as waterproof polyester, nylon, membrane materials, and coated fabrics. Secondly, the collection area of ​​the clean water collection component perfectly overlaps with the projection of the fabric testing area. Combined with the integrated collection structure of the water storage tank, this avoids metering deviations caused by water splashing, side leakage, and evaporation at the source, ensuring reliable and accurate test data. Additionally, the permeable water is directed into an external measuring cylinder via a drain pipe. Combined with a water storage tank, a transparent observation window, and graduated lines, the spray water volume is monitored in real time, achieving accurate quantitative measurement of the permeable water volume and meeting high-precision testing requirements.

[0031] 5. A water permeability testing device and method for processing waterproof textile fabrics. The overall water permeability testing device uses the gravity of the counterweight and the elasticity of the torsion spring as the core power, and works with the reset spring and spring to achieve automatic reciprocating cycle. It does not require motors, PLCs, sensors and other electrical control components, is not affected by environmental humidity and dust, has an extremely low failure rate during long-term operation, and greatly extends its service life.

[0032] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the first overall three-dimensional structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the second overall three-dimensional structure of the present invention;

[0035] Figure 3 For the present invention Figure 2 A magnified structural diagram of part A in the diagram;

[0036] Figure 4 This is a schematic diagram of the assembly state structure of the water collection component, spray detection mechanism and fabric stretching clamping mechanism of the present invention.

[0037] Figure 5 For the present invention Figure 4 A magnified structural diagram of part B in the diagram;

[0038] Figure 6 This is a schematic diagram of the water collection component structure of the present invention;

[0039] Figure 7 This is a schematic diagram of the overall structure of the spray detection mechanism of the present invention;

[0040] Figure 8 This is a schematic diagram of the exploded structure of the spray detection mechanism of the present invention.

[0041] Figure 9 For the present invention Figure 8 A magnified structural diagram of part C in the diagram;

[0042] Figure 10 This is a schematic diagram of the disassembled structure of the No. 1 clamping mechanism of the present invention;

[0043] Figure 11 This is a schematic diagram of the fabric stretching and clamping mechanism of the present invention;

[0044] Figure 12 For the present invention Figure 11 A magnified structural diagram of part D in the diagram;

[0045] Figure 13 This is a cross-sectional view of the water storage component of the present invention;

[0046] Figure 14This is a schematic diagram of the power component structure of the present invention.

[0047] In the diagram: 1. Base; 2. Column; 3. Top plate; 4. Clean water collection assembly; 41. Water storage tank; 42. Drainage pipe; 43. First cross-shaped slide rail; 44. First isolation plate; 45. Second isolation plate; 46. Connecting rod; 5. Spray detection mechanism; 51. Bearing frame; 52. Second cross-shaped slide rail; 53. Bidirectional screw; 54. No. 1 clamping assembly; 541. Lower clamping plate; 542. First sliding sleeve; 543. Threaded sleeve; 544. Guide rod; 545. Upper clamping plate; 546. Lead screw; 55. No. 2 clamping assembly; 56. Third cross-shaped slide rail; 57. Guide sleeve; 58. Base plate; 59. Rack; 510. Lifting rod; 511. Return spring 512. Wire rope; 513. Gear; 514. Protective cover; 515. Support arm; 6. Fabric stretching and clamping mechanism; 61. Second sliding sleeve; 62. Spray plate; 63. Clean water storage component; 631. Water storage tank; 632. Transparent observation window; 633. Scale line; 634. Pressure cylinder; 635. Piston; 636. Top rod; 637. Semicircular block; 638. Spring; 64. Water delivery hose; 65. Power component; 651. Hanger; 652. Support rod; 653. Lever; 654. Protrusion; 655. First half gear; 656. Torsion spring; 657. Lifting ring; 658. Counterweight; 659. Wire rope fixing ring; 66. Second half gear. Detailed Implementation

[0048] 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.

[0049] This invention provides four technical solutions: a water penetration performance testing device for processing waterproof textile fabrics, specifically including the following embodiments:

[0050] like Figures 1-2 , Figure 4 The first embodiment is shown: a water permeability testing device for processing waterproof textile fabrics, including a base 1 and four columns 2 fixedly installed at the four corners of its top, the top of the four columns 2 being fixedly installed with a top plate 3, and further including:

[0051] The water collection component 4 is set on the top of the base 1. It is used to adaptively adjust the opening size of the seepage collection opening according to the test width of the waterproof textile fabric to be tested, so that the seepage collection opening accurately covers the entire projection area of ​​the waterproof textile fabric to be tested, and can collect the water seeping into the fabric into the measuring cylinder to complete the quantitative measurement of the seepage volume.

[0052] The spray testing mechanism 5 is set above the clean water collection component 4. It is used to dynamically spray clean water with regular pulse water pressure onto the waterproof textile fabric to be tested, so as to simulate the waterproof performance of the waterproof textile fabric under rain and uniform water flow in a real environment. By switching different pulse water pressure amplitudes, it can quickly switch between multiple rain intensity testing modes such as light rain, moderate rain and heavy rain. At the same time, the spray testing mechanism 5 can move back and forth along the top of the fabric to be tested to simulate the actual scouring state of oblique wind and rain under natural rainfall.

[0053] The fabric stretching and clamping mechanism 6 is located between the clean water collection component 4 and the spray testing mechanism 5. It is used to flatten and clamp the waterproof textile fabric to be tested and position it at the center of the testing station. The fabric stretching and clamping mechanism 6 and the spray testing mechanism 5 form a transmission linkage. During the testing operation, the fabric stretching and clamping mechanism 6 can be driven to reciprocate the stretching deformation of the waterproof textile fabric to be tested, simulating the actual use conditions such as lateral stretching deformation caused by human limb movement, clothing folding and squeezing, and external object contact and pressure after the textile fabric is made into clothing, so as to complete the testing of the waterproof and seepage performance of the fabric under multiple working conditions.

[0054] In this embodiment, anti-slip and shock-absorbing pads are provided at the bottom of the base 1 to ensure the overall stability of the device without shaking during the testing process; the four columns 2 are welded to the base 1 and the top plate 3 to form a rigid support frame. The adaptive adjustment range of the water collection component 4 covers conventional textile fabrics with a width of 5cm–150cm, with an adjustment accuracy of ≤1mm, ensuring that water seepage from different specifications of the fabrics to be tested can be completely collected, avoiding water overflow that could lead to measurement errors; a flexible waterproof sealing strip is provided at the edge of the collection opening to prevent water from leaking from the side. The pulse water pressure adjustment range of the spray testing mechanism 5 is 0.01MPa–0.3MPa, corresponding to three standard rain intensity levels: light rain 0.01–0.05MPa, moderate rain 0.06–0.15MPa, and heavy rain 0.16–0.3MPa. The clamping force of the fabric stretching clamping mechanism 6 is continuously adjustable from 0 to 500N, the stretching deformation is 0 to 20%, and the stretching frequency is 0.5 to 5Hz, which can simulate the fabric deformation state of human daily activities. The clamping position is equipped with an anti-slip and wear-resistant pad to avoid damage to the fabric or slippage during the clamping process, ensuring that the testing conditions are highly consistent with actual use.

[0055] like Figures 6-10The second embodiment is shown. The clean water collection assembly 4 includes a water storage tank 41 fixedly mounted on the top of the base 1. A drain pipe 42 is fixedly connected to the side wall of the water storage tank 41. The drain pipe 42 is used to discharge the seepage water collected inside the water storage tank 41 to the outside. The outlet end of the drain pipe 42 is connected to an external measuring cylinder. First cross-shaped slide rails 43 are fixedly installed on the left and right sides of the top of the water storage tank 41. A first isolation plate 44 and a second isolation plate 45 are symmetrically slidably mounted on the two first cross-shaped slide rails 43. A connecting rod 46 is fixedly mounted on the top of the first isolation plate 44 and the second isolation plate 45 respectively.

[0056] In this embodiment, the water storage tank 41 is a rectangular stainless steel box with an open top. The inner wall is polished and waterproofed, with no dead corners for water accumulation. The volume is not less than 5L, meeting the water storage requirements for long-term continuous testing. The drain pipe 42 is a corrosion-resistant flexible hose with a quick connector at the outlet, which can be quickly connected to measuring cylinders of different ranges to achieve accurate reading of seepage. The first cross-shaped slide rail 43 is composed of a horizontal slide rail and a vertical slide rail fixed vertically. The surface of the slide rail is hardened by quenching to ensure smooth and unimpeded movement of the first isolation plate 44 and the second isolation plate 45. The first isolation plate 44 and the second isolation plate 45 are made of transparent acrylic material, with waterproof sealing strips on the sides. The width of the opening formed by their relative movement perfectly matches the width of the fabric to be tested. The connecting rod 46 is a rigid metal rod with rust-proof treatment to ensure no deformation or loosening during transmission.

[0057] like Figure 3 , Figures 7-10The third embodiment is shown. The spray detection mechanism 5 includes a support frame 51 that is fixedly mounted on the outer wall of four columns 2. The top two sides of the support frame 51 are fixedly mounted with second cross-shaped slide rails 52. A bidirectional screw 53 is rotatably mounted on the top of the support frame 51 and between the two second cross-shaped slide rails 52 via a bracket. The outer walls of the two second cross-shaped slide rails 52 are respectively slidably fitted with a first clamping component 54 and a second clamping component 55. The top ends of the two connecting rods 46 are respectively connected to the bottom center positions of the first clamping component 54 and the second clamping component 55. The first clamping component 54 and the second clamping component 55 are respectively threadedly fitted onto the positive and negative thread sections of the bidirectional screw 53. The bidirectional screw 53 drives the first clamping component 54 and the second clamping component 55 to move closer or further away from each other simultaneously through a linkage unit to complete the stretching and releasing operation of the waterproof textile fabric. The outer wall of the bidirectional screw 53 has threads with opposite directions of rotation on both sides. The second clamping assembly 55 and the first clamping assembly 54 move within the areas with opposite threads on both sides of the bidirectional screw 53. The support frame 51 is a rectangular metal frame, which is detachably fixed to the four columns 2 with bolts for easy disassembly and maintenance. The two ends of the bidirectional screw are rotatably connected to the bracket through rolling bearings. The pitch of the positive and negative threads is the same and the rotation direction is opposite, ensuring that the first clamping assembly 54 and the second clamping assembly 55 move synchronously, with the same speed and opposite direction, avoiding uneven force on one side of the fabric. The movement stroke of the first clamping assembly 54 and the second clamping assembly 55 is fully linked with the movement stroke of the first isolation plate 44 and the second isolation plate 45, ensuring that the projection of the clamping area and the collection area always coincides, preventing water leakage.

[0058] In this embodiment, the linkage unit includes a third cross-shaped slide rail 56, which is fixedly installed on the outer wall of the column 2 via two sets of support arms 515. Guide sleeves 57 and a base plate 58 are fixedly mounted at the upper and lower ends of the third cross-shaped slide rail 56, respectively. Two guide wheels are rotatably mounted inside the guide sleeves 57. A rack 59 is slidably mounted on the side of the third cross-shaped slide rail 56 near the bidirectional screw 53. A lifting rod 510 is fixedly connected to the bottom end of the rack 59. The lower end of the lifting rod 510 slides through the base plate 58 and is fixedly mounted with a spring baffle. A return spring 511 is slidably sleeved between the base plate 58 and the spring baffle on the outer wall. A steel wire rope 512 is also fixedly connected to the top of the rack 59. The steel wire rope 512 passes through the guide sleeve 57 and is extended outward after being guided by the guide wheel. A gear 513 that meshes with the rack 59 is fixedly sleeved on the outer wall of the bidirectional screw 53. A protective cover 514 is provided on the outer side of the third cross-shaped slide rail 56. The protective cover 514 is detachably fixed to the outer wall of the support arm 515 by bolts. The contact position between the bidirectional screw 53 and the protective cover 514 is installed by a bearing rotational fit. The No. 1 clamping assembly 54 and the No. 2 clamping assembly 55 have the same structure. The No. 1 clamping assembly 54 includes a lower clamping plate 541 and two first sliding sleeves 542 fixedly disposed on the bottom sides of the lower clamping plate 541. The two first sliding sleeves 542 are respectively slidably sleeved on the outer wall of the second cross-shaped slide rail 52 at the corresponding positions. A threaded sleeve 543 is also fixedly disposed at the bottom middle position of the lower clamping plate 541. The threaded sleeve 543 is sleeved on one side of the outer wall of the bidirectional screw 53. Guide rods 544 are fixedly disposed on both sides of the top of the lower clamping plate 541. An upper clamping plate 545 is slidably sleeved on the outer wall of the two guide rods 544. Rubber anti-slip pads are fixedly disposed on the opposite side walls of the upper clamping plate 545 and the lower clamping plate 541. A lead screw 546 is also rotatably disposed at the top middle position of the lower clamping plate 541. The lead screw 546 is threaded through the upper clamping plate 545 and extends to the outside.

[0059] like Figure 5 , Figures 11-14The fourth embodiment is shown. The fabric stretching and clamping mechanism 6 includes two second sliding sleeves 61 symmetrically arranged front and rear. The two second sliding sleeves 61 are respectively fixedly mounted on the columns 2 at corresponding positions. A spray plate 62 is slidably mounted on the opposite sidewalls of the two second sliding sleeves 61. A second half gear 66 is fixedly mounted at the top center of the spray plate 62. A clean water storage component 63 is fixedly mounted inside the top plate 3 and directly above the spray plate 62. The clean water storage component 63 and the spray plate 62 are connected by a water supply hose 64. A power component 65 for driving the spray plate 62 to spray the waterproof textile fabric to be tested in an oscillating manner is also provided between the spray plate 62 and the clean water storage component 63. One end of the water supply hose 64 is fixedly connected to the bottom side of the water storage tank 631, and the other end is fixedly connected to the top side of the spray plate 62, for conveying the test liquid in the water storage tank 631 to the spray plate 62. The projection of the area between clamping assembly 54 and clamping assembly 55 completely overlaps with the projection area between the first isolation plate 44 and the second isolation plate 45. The spray plate 62 is a hollow rectangular plate with evenly distributed spray holes at the bottom. The hole diameter is 0.5–1 mm, and the hole spacing is 1–2 cm, ensuring uniform spraying without dead angles. The water delivery hose 64 is a high-pressure flexible pipe with a pressure resistance ≥0.5 MPa. Its length is adapted to the swing stroke of the spray plate 62, preventing pulling, bending, and blockage.

[0060] In this embodiment, the clean water storage assembly 63 includes a water storage tank 631 and a transparent observation window 632 disposed on its outer wall. A pressure balance pipe is also fixedly disposed on the top of the water storage tank 631. A one-way valve that only allows external air to enter is fixedly disposed inside the pressure balance pipe. The surface of the transparent observation window 632 is provided with scale lines 633 for displaying the liquid level. A pressure boosting cylinder 634 that communicates with the bottom of the water storage tank 631 is fixedly disposed on the bottom. A piston 635 is slidably disposed inside the pressure boosting cylinder 634. A push rod 636 is fixedly disposed at the bottom of the piston 635. The bottom end of the push rod 636 slides through the pressure boosting cylinder 634 and is fixedly disposed with a semi-circular block 637. A spring 638 is slidably sleeved on the outer wall of the push rod 636 and located between the semi-circular block 637 and the bottom of the pressure boosting cylinder 634.

[0061] In this embodiment, the water storage tank 631 has a volume ≥10L, is made of food-grade stainless steel, has a smooth inner wall free of scale, and is equipped with a water inlet and a sealing cap at the top for easy replenishment of testing water; the transparent observation window 632 is made of high-transparency tempered glass, and the scale line 633 has an accuracy of ±10mL, which can monitor the water level in real time and avoid water shortage affecting the test. The booster cylinder 634 is sealed and connected to the water storage tank 631; the piston 635 is fitted with a sealing ring on its outer wall, which has a good sealing effect and prevents water leakage; the push rod 636 is a rigid metal rod, which can move vertically without deviation; the semi-circular block 637 has a smooth surface to reduce transmission friction; the spring 638 is a compression spring with stable return force, which ensures that the piston 635 falls back quickly when there is no external force, so as to achieve stable output of pulse water pressure.

[0062] In this embodiment, the power assembly 65 includes two hangers 651 fixedly mounted on the front and rear sides of the bottom of the top plate 3. A support rod 652 is fixedly mounted on the opposite sidewalls of the two hangers 651. A lever 653 is rotatably sleeved on the outer wall of the support rod 652. A protrusion 654 for pushing the semicircular block 637 upward is fixedly mounted on one side of the top of the lever 653. A first half-gear 655, meshing with a second half-gear 66, is fixedly mounted at the middle of the bottom of the lever 653. A torsion spring 656 is provided between the lever 653 and the support rod 652 to drive the lever 653 to return to its horizontal position after deviating from the horizontal state. A lifting ring 657 is also fixedly mounted at the bottom of one end of the lever 653. A counterweight 658 is detachably mounted at the bottom of the lifting ring 657. A wire rope fixing ring 659 is fixedly mounted at the other end of the lever 653. The top end of the wire rope 512 is fixedly connected to the wire rope fixing ring 659.

[0063] This invention also provides a method for testing the water permeability of waterproof textile fabrics, and a device for testing the water permeability of waterproof textile fabrics. The method includes the following steps:

[0064] Step 1: Using the base 1, column 2, and top plate 3 as support references, the waterproof textile fabric to be tested is flattened, clamped, and positioned by the fabric stretching and clamping mechanism 6.

[0065] Step 2: After the fabric is clamped, the suspended counterweight triggers the linkage, driving the spray detection mechanism 5 and the fabric stretching clamping mechanism 6 into the linkage working state.

[0066] Step 3: The spray detection mechanism 5 achieves dynamic pulse spraying and position adjustment under the linkage, while the fabric stretching and clamping mechanism 6 reciprocates to stretch the fabric to simulate the actual wearing and stretching conditions.

[0067] Step 4: The water collection component 4 synchronously and adaptively matches the fabric width, completely collects the sprayed water, and completes quantitative measurement to achieve waterproof and seepage performance testing under multiple working conditions.

[0068] In use, the rigid support frame consisting of base 1, column 2, and top plate 3 serves as the overall installation reference for the device. The waterproof textile fabric to be tested is placed flat between the first clamping component 54 and the second clamping component 55 of the fabric stretching clamping mechanism 6. The screw 546 is rotated to drive the upper clamping plate 545 to move smoothly down along the guide rod 544, which, together with the lower clamping plate 541, evenly clamps the two sides of the fabric to be tested. The first sliding sleeve 542 at the bottom of the first clamping component 54 and the second clamping component 55 forms a sliding guide along the second cross-shaped slide rail 52. The threaded sleeve 543 and the bidirectional screw 53 form a precision thread engagement. The support frame 51 provides stable support for the overall clamping structure.

[0069] Next, a counterweight 658 matching the testing requirements is suspended on the lifting ring 657 of the power component 65. Under the gravity of the counterweight 658, the lever 653 begins to rotate around the support rod 652 supported by the hanger 651. One end of the lever 653 with a wire rope fixing ring 659 pulls the wire rope 512 upward. The wire rope 512 moves smoothly upward after being guided by the guide sleeve 57, forming the core driving action of fabric detection. At the same time, the rotation of the lever 653 drives the protrusion 654 to move upward synchronously and push the semicircular block 637. The semicircular block 637 pushes the push rod 636 and the piston 635 to slide upward in a sealed manner in the pressure booster cylinder 634, changing the water pressure inside the clean water storage component 63 and realizing the adjustment of the spray pressure. The water level in the water storage tank 631 is monitored in real time through the transparent observation window 632 and the scale line 633. The spring 638 provides the piston 635 with a downward reset force.

[0070] Next, the steel wire rope 512 moves upward to pull the rack 59 along the third cross-shaped slide rail 56. The rack 59 meshes with the gear 513 to drive the bidirectional screw 53 to rotate. The bidirectional screw 53 drives the first clamping assembly 54 and the second clamping assembly 55 to move synchronously along the second cross-shaped slide rail 52. Through the connecting rod 46, it drives the first isolation plate 44 and the second isolation plate 45 of the water collection assembly 4 to move synchronously along the first cross-shaped slide rail 43, so that the water collection opening at the top of the water tank 41 is precisely matched with the width of the fabric to be tested. The support arm 515, the base plate 58, and the protective cover 514 form a linkage protective support structure. The lifting rod 510 and the return spring 511 work together to realize the smooth lifting and resetting of the rack 59.

[0071] Next, as lever 653 rotates around support rod 652, it simultaneously drives the first half gear 655 to rotate. The first half gear 655 meshes with the second half gear 66, thereby driving the spray plate 62 to move along the second sliding sleeve 61, realizing dynamic adjustment of the spray position. After lever 653 is flipped to the set equilibrium position by the counterweight, torsion spring 656 stores elastic potential energy. When the elastic force of torsion spring 656 is greater than the flipping torque of counterweight 658, it drives lever 653 to quickly reset. Under the alternating action of counterweight and torsion spring, lever 653 swings back and forth around support rod 652 continuously according to a set cycle, so that the three actions of spray pressure adjustment, dynamic movement of spray plate 62, and traction and stretching of steel wire rope 512 are synchronously cycled. Clean water is delivered to spray plate 62 through water supply hose 64 to complete pulsed dynamic spraying, and at the same time realizes the simulation detection of reciprocating tensile deformation of the fabric under test.

[0072] Next, under the continuous reciprocating swing of lever 653, steel wire rope 512 is periodically pulled and released, which in turn drives bidirectional screw 53 to periodically rotate forward and backward through rack 59 and gear 513. This causes clamping component 54 and clamping component 55 to move synchronously back and forth along the second cross-shaped slide rail 52, periodically stretching and deforming the clamped waterproof textile fabric to be tested. This realistically simulates the actual working conditions of the fabric being pulled, squeezed, and deformed by human limbs during the wearing and use of clothing, ensuring that the testing environment is consistent with the actual use conditions.

[0073] Finally, during the spraying and stretching tests, the water seeping through the fabric falls into the water storage tank 41 of the clean water collection component 4 and is collected uniformly. The collected water is then discharged through the drain pipe 42 to the external measuring cylinder, thus completing the accurate measurement of the seepage volume and the determination of the waterproof performance.

[0074] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0075] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A water permeability testing device for processing waterproof textile fabrics, comprising a base and four columns fixedly installed at its top four corners, the tops of the four columns being jointly fixedly provided with a top plate, characterized in that, Also includes: The water collection component is located on the top of the base and is used to adaptively adjust the opening size of the water collection opening according to the test width of the waterproof textile fabric to be tested, so that the water collection opening accurately covers the entire projected area of ​​the waterproof textile fabric to be tested. The spray testing mechanism is set above the clean water collection component. It is used to dynamically spray clean water with regular pulse water pressure onto the waterproof textile fabric to be tested, so as to simulate the waterproof performance of the waterproof textile fabric under rain and uniform water flow in a real environment. By switching different pulse water pressure amplitudes, it can quickly switch between multiple rain intensity testing modes and simulate the actual rinsing state of oblique wind blowing rain under natural rainfall conditions. The fabric stretching and clamping mechanism is located between the clean water collection component and the spray testing mechanism. It is used to flatten and clamp the waterproof textile fabric to be tested and position it at the center of the testing station. The fabric stretching and clamping mechanism and the spray testing mechanism form a transmission linkage. During the testing operation, the fabric stretching and clamping mechanism can be driven to reciprocate the stretching deformation of the waterproof textile fabric to be tested.

2. The water penetration performance testing device for processing waterproof textile fabrics according to claim 1, characterized in that: The clean water collection assembly includes a water storage tank fixed to the top of the base. A drain pipe is fixedly connected to the side wall of the water storage tank. The drain pipe is used to discharge the seepage water collected inside the water storage tank to the outside. The outlet end of the drain pipe is connected to an external measuring cylinder. A first cross-shaped slide rail is fixedly installed on both the left and right sides of the top of the water storage tank. A first isolation plate and a second isolation plate are symmetrically slidably mounted on the two first cross-shaped slide rails. A connecting rod is fixedly provided on the top of the first isolation plate and the second isolation plate respectively.

3. The water penetration performance testing device for processing waterproof textile fabrics according to claim 2, characterized in that: The spray testing mechanism includes a support frame fixedly mounted on the outer walls of four columns. A second cross-shaped slide rail is fixedly mounted on both sides of the top of the support frame. A bidirectional screw is rotatably mounted on the top of the support frame, located between the two second cross-shaped slide rails, via a bracket. A first clamping component and a second clamping component are slidably fitted onto the outer walls of the two second cross-shaped slide rails, respectively. The top ends of the two connecting rods are connected to the bottom center positions of the first and second clamping components, respectively. The first and second clamping components are threadedly fitted onto the positive and negative thread sections of the bidirectional screw. The bidirectional screw drives the first and second clamping components to move closer or further apart synchronously via a linkage unit, thereby completing the stretching and releasing operation of the waterproof textile fabric.

4. The water penetration performance testing device for processing waterproof textile fabrics according to claim 3, characterized in that: The linkage unit includes a third cross-shaped slide rail, which is fixedly installed on the outer wall of the column via two sets of support arms. The upper and lower ends of the third cross-shaped slide rail are respectively fixed with guide sleeves and a base plate. Two guide wheels are rotatably assembled inside the guide sleeve. A rack is slidably sleeved on the side of the third cross-shaped slide rail near the bidirectional screw. A lifting rod is fixedly connected to the bottom end of the rack. The lower end of the lifting rod slides through the base plate and is fixedly fitted with a spring baffle. A return spring is slidably sleeved on the outer wall of the lifting rod between the base plate and the spring baffle. A steel wire rope is also fixedly connected to the top end of the rack. The steel wire rope passes through the guide sleeve and is guided by the guide wheels before extending outward. The outer wall of the bidirectional screw is fixedly fitted with a gear that meshes with the rack. The outer side of the third cross-shaped slide rail is covered with a protective cover. The protective cover is detachably fixed to the outer wall of the support arm by bolts. The contact position between the bidirectional screw and the protective cover is installed by a bearing rotational fit.

5. The water penetration performance testing device for processing waterproof textile fabrics according to claim 3, characterized in that: The No. 1 clamping assembly and the No. 2 clamping assembly have the same structure. The No. 1 clamping assembly includes a lower clamping plate and a first sliding sleeve fixedly disposed on both sides of the bottom of the lower clamping plate. The two first sliding sleeves are respectively slidably sleeved on the outer wall of the second cross-shaped slide rail at corresponding positions. A threaded sleeve is also fixedly disposed at the bottom middle position of the lower clamping plate. The threaded sleeve is sleeved on one side of the outer wall of the bidirectional screw. Guide rods are fixedly disposed on both sides of the top of the lower clamping plate. An upper clamping plate is slidably sleeved on the outer wall of the two guide rods. Rubber anti-slip pads are fixedly disposed on the opposite side walls of the upper clamping plate and the lower clamping plate. A lead screw is also rotatably disposed at the top middle position of the lower clamping plate. The lead screw thread passes through the upper clamping plate and extends to the outside.

6. The water penetration performance testing device for processing waterproof textile fabrics according to claim 1, characterized in that: The fabric stretching and clamping mechanism includes two second sliding sleeves symmetrically arranged front and rear. The two second sliding sleeves are respectively fixedly mounted on columns at corresponding positions. A spray plate is slidably mounted on the opposite sidewalls of the two second sliding sleeves. A second half gear is fixedly mounted at the top center of the spray plate. A clean water storage component is fixedly mounted inside the top plate and directly above the spray plate. The clean water storage component and the spray plate are connected by a water supply hose. A power component for driving the spray plate to spray water onto the waterproof textile fabric to be tested in a swinging manner is also provided between the spray plate and the clean water storage component.

7. The water penetration performance testing device for processing waterproof textile fabrics according to claim 6, characterized in that: The clean water storage assembly includes a water storage tank and a transparent observation window disposed on its outer wall. A pressure balancing pipe is fixedly disposed on the top of the water storage tank. A one-way valve that allows only external air to enter is fixedly disposed inside the pressure balancing pipe. The surface of the transparent observation window is provided with scale lines for displaying the liquid level. A pressure boosting cylinder connected to the bottom of the water storage tank is fixedly disposed at the bottom of the water storage tank. A piston is slidably disposed inside the pressure boosting cylinder. A push rod is fixedly disposed at the bottom of the piston. The bottom end of the push rod slides through the pressure boosting cylinder and is fixedly disposed with a semi-circular block. A spring is slidably sleeved on the outer wall of the push rod between the semi-circular block and the bottom of the pressure boosting cylinder.

8. The water penetration performance testing device for processing waterproof textile fabrics according to claim 7, characterized in that: The power assembly includes two hangers fixedly installed on the front and rear sides of the bottom of the top plate. A support rod is fixedly installed on the opposite side wall of the two hangers. A lever is rotatably sleeved on the outer wall of the support rod. A protrusion for pushing a semicircular block upward is fixedly installed on one side of the top of the lever. A first half gear that meshes with the second half gear is fixedly installed at the middle position of the bottom of the lever. A torsion spring is installed between the lever and the support rod to drive the lever to return to its original position after deviating from the horizontal state. A lifting ring is also fixedly installed at the bottom of one end of the lever. A counterweight is detachably installed at the bottom of the lifting ring. A wire rope fixing ring is fixedly installed at the other end of the lever.

9. A method for testing the water permeability of waterproof textile fabrics, characterized in that: The water penetration performance testing device for processing waterproof textile fabrics as described in any one of claims 1-8, the method comprising the following steps: Step 1: Using the base, column, and top plate as support references, the waterproof textile fabric to be tested is flattened, clamped, and positioned using the fabric stretching and clamping mechanism. Step 2: After the fabric is clamped, the suspended counterweight triggers the linkage, driving the spray detection mechanism and the fabric stretching clamping mechanism into the linkage working state. Step 3: The spray testing mechanism achieves dynamic pulse spraying and position adjustment under the linkage, while the fabric stretching and clamping mechanism reciprocates to stretch the fabric to simulate the actual wearing and stretching conditions. Step 4: The water collection component synchronously and adaptively matches the fabric width, completely collects the sprayed water, and completes quantitative measurement to achieve waterproof and seepage performance testing under multiple working conditions.

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