Strength detection mechanism of a rescue suit composite fabric

Abstract

The application discloses a kind of strength detection mechanism of rescue suit composite fabric, belong to new material fabric detection technical field, the application includes machine body, motor is fixedly installed on the machine body, and two-way screw rod is rotatably installed on the machine body, and motor drives two-way screw rod rotation, and machine body is symmetrically slidably provided with moving plate, simultaneously two-way screw rod and moving plate are threadedly connected, mounting plate is fixed on the moving plate, and elastic sliding installation is carried out in the mounting plate and movable plate, and positioning winding roller is rotatably installed on the movable plate, and the preliminary positioning assembly for positioning the two ends of fabric is provided on the positioning winding roller, the puncture assembly for rotating and puncturing fabric is further provided on the movable plate.The strength detection mechanism of rescue suit composite fabric can be self-adapted to fixed locking for fabric, effectively avoids fabric loosening during detection, and can carry out integrated detection in multiple ways for fabric, effectively ensures detection effect.

Description

Technical Field

[0001] This invention relates to the field of new material fabric testing technology, specifically a strength testing mechanism for composite fabrics used in rescue clothing. Background Technology

[0002] The new composite material fabric for rescue suits is characterized by its lightweight, high protection, and multi-functional integration. It also provides multiple protective properties such as impact resistance, tear resistance, and abrasion resistance, making it suitable for various high-risk rescue operation scenarios. Because this type of fabric is composed of multiple layers of materials with completely different mechanical parameters, deformation characteristics, and material properties, it has a large number of heterogeneous composite interfaces. Compared with traditional homogeneous fabrics, its stress failure mode is more complex. Mechanical strength performance is the core key to determining the service safety and service life of the new composite material for rescue suits. Therefore, during the production and research and development of composite fabrics for rescue suits, it is necessary to use strength testing institutions to test the fabric performance.

[0003] Existing technology (Chinese patent publication number: CN121762326A, publication date: 2026-03-31) discloses a fabric tensile strength tester with automatic clamping function, including: an installation part, which rotates the upper frame with the side plate of the lifting frame, and the bottom slider of the movable rod is slidably connected to the top rod. When the detection module is pulled to perform fabric tensile testing, the frame can swing at the lower end of the lifting frame to change the stress point of the fabric. This design can simulate the dynamic, multi-directional, and complex stresses that the fabric bears in actual application scenarios such as clothing movement stretching and home textile friction stretching, making the test data more consistent with the actual performance of the fabric. This solves the problem that the detection mode of tensile testing devices has obvious limitations. Traditional equipment mostly adopts the static single-point tensile testing method, which cannot truly reproduce the dynamic, multi-directional, and complex stresses that the fabric bears in actual application scenarios. This static test data has a weak correlation with actual performance and is difficult to fully reflect the mechanical properties of the fabric. Existing technology (Chinese patent publication number: CN120404356A, publication date: 2025-08-0) Chinese Patent No. 1 discloses a novel textile fabric tensile strength testing device, including a base, a pressure block on the top of the base, and push plates on both sides of the pressure block. A first pressure sensor is installed inside the push plate. An adjustment component is provided on the top of the base. By cooperating with the hydraulic rod and clamping plate of the clamping component through the rotating shaft, gear, and toothed plate of the adjustment component, precise clamping and fan-shaped stretching of the fabric side is achieved, which solves the defect of traditional devices that can only perform horizontal tensile force testing. The adjustment plate, adjustment groove, and moving shaft of the linkage component are driven by the screw and moving sleeve of the drive component, so that the fabric produces fan-shaped deformation under the action of lateral tensile force. Combined with the dual monitoring of the first and second pressure sensors, the tensile strength of the fabric side can be more comprehensively evaluated, significantly improving the accuracy of the test data. It is especially suitable for testing high-strength fabrics that are easy to tear on the side.

[0004] Most existing fabric strength testing institutions use a single tension method to test the tensile strength of fabrics. However, rescue clothing will encounter various complex external forces during actual use, resulting in relatively simple test data. At the same time, the single clamping method for positioning the fabric makes it easy for the clamping end of the fabric to loosen when the tension increases, which will affect the normal test and has certain defects in use. Summary of the Invention

[0005] The purpose of this invention is to provide a strength testing mechanism for composite fabrics of rescue clothing, in order to solve the problem mentioned in the background art that most fabric strength testing mechanisms on the market currently use a single tension method to test the tensile strength of the fabric. However, rescue clothing will encounter various complex external forces during actual use, resulting in relatively simple test data. At the same time, the single clamping method for positioning the fabric makes it easy for the clamping end of the fabric to loosen when the tension increases.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a strength testing mechanism for composite fabrics of rescue suits, comprising a machine body, a motor fixedly mounted on the machine body, and a bidirectional lead screw rotatably mounted on the machine body, the motor driving the bidirectional lead screw to rotate; symmetrically slidingly mounted movable plates on the machine body, the bidirectional lead screw and the movable plates being threadedly connected; a mounting plate fixedly mounted on the movable plate, a movable plate elastically slidably mounted on the mounting plate, and a positioning take-up roller rotatably mounted on the movable plate; the positioning take-up roller being provided with a preliminary positioning component for positioning both ends of the fabric; a protective plate fixedly mounted on the machine body, and a transmission mechanism between the positioning take-up roller and the protective plate. The components include a mounting plate that drives the movable plate to move, and a transmission component that drives the positioning take-up roller to rotate. A fixed cylinder is fixedly installed on the outer side of the mounting plate, and an air supply component is provided between the movable plate and the fixed cylinder. The inner side of the positioning take-up roller is filled with an elastic bladder, and a reserved hole is provided on the positioning take-up roller. After the elastic bladder expands, it protrudes outward through the reserved hole. A cavity is provided inside the positioning take-up roller, and air holes communicating with the cavity are also evenly provided on the positioning take-up roller. During the relative displacement of the mounting plate and the movable plate, the air pressure inside the elastic bladder and the cavity is adjusted by the air supply component. A piercing component for rotating and piercing the fabric is also provided on the movable plate.

[0007] Preferably, the preliminary positioning component includes a limiting perforation through the positioning take-up roller, the limiting perforation being fitted with the fabric gap, and an adhesive component being fixedly provided on the outer side of the positioning take-up roller, and the adhesive component being fixedly bonded to the end edge of the fabric.

[0008] Preferably, the transmission assembly includes a first gear fixedly installed on the outside of the positioning take-up roller shaft and a first rack fixedly installed on the protective plate. The first gear and the first rack are meshed and connected. When the mounting plate drives the movable plate to move, the first gear and the first rack mesh and drive the positioning take-up roller to rotate. During the rotation of the positioning take-up roller, the end of the fabric is synchronously taken up.

[0009] Preferably, guide rods are symmetrically fixedly installed on the movable plate, and the guide rods slide through the mounting plate. The air supply assembly includes a fixed rod fixedly installed on the movable plate, and a sealing plug is fixedly installed at the end of the fixed rod. A fixed cylinder is fixedly installed on the mounting plate, and an elastic element is fixedly connected between the sealing plug and the fixed cylinder. The movable plate and the mounting plate are relatively displaced after the fabric is tightened.

[0010] Preferably, an air storage bladder is provided between the sealing plug and the fixed cylinder, and the sealing plug squeezes the air storage bladder when the mounting plate and the movable plate move relative to each other. A first air supply pipe is connected to the outside of the air storage bladder, and a first fixed pipe connected to the elastic bladder is fixedly provided through the shaft of the positioning take-up roller, and the first air supply pipe and the first fixed pipe are sealed and rotatably connected.

[0011] Preferably, the air storage bladder supplies air to the inside of the elastic bladder after being compressed, and after the elastic bladder is inflated, it protrudes outward through the reserved hole, and the protruding part of the expanded elastic bladder is in close contact with the fabric on the outside of the positioning take-up roller.

[0012] Preferably, the sealing plug and the fixed cylinder are slidably connected, and the end of the fixed cylinder away from the mounting plate is fixedly connected to the second air supply pipe, and the other end of the positioning take-up roller is fixedly connected to the second fixed pipe through it. The second air supply pipe and the second fixed pipe are rotatably connected, the second fixed pipe communicates with the cavity, and the air hole is sealed and fitted to the fabric wound on the outside of the positioning take-up roller.

[0013] Preferably, the puncture assembly includes an adjusting screw that rotates on the outside of the mounting plate, and an adjusting plate is threadedly connected to the outside of the adjusting screw. A second rack is symmetrically arranged on the adjusting plate, and the second rack slides through the mounting plate.

[0014] Preferably, the puncture assembly further includes a second gear rotatably mounted on the movable plate, and the second rack and the second gear mesh with each other during the relative movement of the mounting plate and the movable plate, and the puncture component is fixedly mounted on the shaft of the second gear, and the puncture component is driven to puncture the taut fabric during the rotation of the second gear.

[0015] Compared with the prior art, the beneficial effects of the present invention are: the strength testing mechanism of the composite fabric of the rescue suit can adaptively fix and lock the fabric, effectively avoiding the fabric from loosening during the testing process, and can perform integrated testing of the fabric in multiple ways, effectively ensuring the testing effect, as detailed below; 1. A positioning take-up roller is provided. The end of the fabric is passed through the limiting hole on the positioning take-up roller and pasted to the outside of the adhesive part. Then, the bidirectional screw is controlled to drive the two moving plates away from each other. The mounting plate will drive the movable plate to move synchronously, so that the first gear on the shaft of the positioning take-up roller will mesh with the first rack, thereby driving the positioning take-up roller to rotate. This allows the two positioning take-up rollers to take up both ends of the fabric, so that the fabric is gradually tightened and the initial positioning of the fabric is achieved.

[0016] 2. Equipped with a positioning take-up roller, an elastic bladder, and air holes, when the fabric is taut, the moving plate continues to move, causing relative displacement between the mounting plate and the movable plate. At this time, the fixing rod pulls the sealing plug to slide inside the fixing cylinder, causing the sealing plug to squeeze the air storage bladder. This causes the gas in the air storage bladder to fill the elastic bladder, causing the air storage bladder to expand. Part of the expanded air storage bladder protrudes through the reserved hole onto the surface of the positioning take-up roller and closely adheres to the wound fabric. By applying radial force, the wound fabric is further taut. At the same time, the fixing cylinder draws air from the cavity of the positioning take-up roller through the second air supply pipe. The fabric after several turns has a certain sealing effect, allowing the air holes to generate suction on the wound fabric, further preventing the fabric ends from loosening and achieving self-adjustment.

[0017] 3. Equipped with a puncture device, after the fabric tensile strength test is completed, the moving plate continues to move, causing the second rack to mesh with the second gear, thereby driving the second gear to rotate. This allows the puncture device on the shaft of the second gear to rotate and puncture the taut fabric, achieving further puncture strength testing and effectively ensuring the comprehensiveness of the fabric test data. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a schematic diagram of the mobile board mounting structure of the present invention; Figure 3 This is a schematic diagram of the positioning take-up roller installation structure of the present invention; Figure 4 This is a schematic diagram of the connection structure between the mounting plate and the movable plate of the present invention; Figure 5 This is a schematic diagram of the three-dimensional structure of the positioning take-up roller of the present invention; Figure 6 This is a schematic cross-sectional view of the fixed cylinder structure of the present invention; Figure 7 This is a schematic cross-sectional view of the positioning take-up roller of the present invention; Figure 8 This is a schematic diagram of the installation structure of the puncture component of the present invention.

[0019] In the diagram: 1. Machine body; 2. Motor; 3. Bidirectional lead screw; 4. Moving plate; 5. Mounting plate; 6. Movable plate; 7. Guide rod; 8. Positioning take-up roller; 9. Limiting perforation; 10. Adhesive component; 11. First gear; 12. Protective plate; 13. First rack; 14. Fixing rod; 15. Sealing plug; 16. Fixing cylinder; 17. Air storage bladder; 18. First air supply pipe; 19. Second air supply pipe; 20. First fixing pipe; 21. Second fixing pipe; 22. Elastic bladder; 23. Reserved hole; 24. Cavity; 25. Air hole; 26. Adjusting screw; 27. Adjusting plate; 28. Second rack; 29. ​​Second gear; 30. Puncture component. Detailed Implementation

[0020] 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.

[0021] Example 1: Existing fabric strength testing mechanisms use a single clamping method for fabric positioning, which makes the clamped ends of the fabric prone to loosening when the tensile force increases. To solve this technical problem, this example discloses the following technical content. Please refer to [link / reference]. Figures 1-7 As shown; A strength testing mechanism for composite fabrics used in rescue suits includes a machine body 1. A motor 2 is fixedly mounted on the machine body 1, and a bidirectional lead screw 3 is rotatably mounted on the machine body 1, with the motor 2 driving the bidirectional lead screw 3 to rotate. A movable plate 4 is symmetrically slidably arranged on the machine body 1, and the bidirectional lead screw 3 and the movable plate 4 are threadedly connected. A mounting plate 5 is fixedly mounted on the movable plate 4, and a movable plate 6 is elastically slidably mounted on the mounting plate 5. A positioning take-up roller 8 is rotatably mounted on the movable plate 6, and the positioning take-up roller 8 is provided with a preliminary positioning component for positioning both ends of the fabric. A protective plate 12 is fixedly mounted on the machine body 1, and a transmission component is provided between the positioning take-up roller 8 and the protective plate 12. During the movement of the movable plate 6 driven by the mounting plate 5, the transmission component drives the positioning take-up roller 8 to rotate. A fixed cylinder 16 is fixedly installed on the outer side of the mounting plate 5, and an air supply component is provided between the movable plate 6 and the fixed cylinder 16. The inner side of the positioning take-up roller 8 is filled with an elastic bladder 22, and a reserved hole 23 is provided on the positioning take-up roller 8. After the elastic bladder 22 expands, it protrudes outward through the reserved hole 23. A cavity 24 is provided inside the positioning take-up roller 8, and air holes 25 communicating with the cavity 24 are also evenly provided on the positioning take-up roller 8. During the relative displacement of the mounting plate 5 and the movable plate 6, the air pressure inside the elastic bladder 22 and the cavity 24 is adjusted by the air supply component.

[0022] The initial positioning component includes a limiting perforation 9 that passes through the positioning take-up roller 8, and the limiting perforation 9 is in clearance fit with the fabric. An adhesive component 10 is fixedly provided on the outer side of the positioning take-up roller 8 and is fixedly bonded to the end edge of the fabric. The transmission component includes a first gear 11 fixedly installed on the outer side of the shaft of the positioning take-up roller 8 and a first rack 13 fixedly installed on the protective plate 12. The first gear 11 and the first rack 13 are meshed and connected. When the mounting plate 5 drives the movable plate 6 to move, the first gear 11 and the first rack 13 mesh and drive the positioning take-up roller 8 to rotate. During the rotation of the positioning take-up roller 8, the end of the fabric is synchronously wound up.

[0023] The end of the fabric is passed through the limiting perforation 9 on the positioning take-up roller 8 and attached to the outside of the adhesive 10, leaving a portion of fabric between the two positioning take-up rollers 8. Then, the motor 2 is started, controlling the bidirectional lead screw 3 to drive the two moving plates 4 away from each other. At the same time, the mounting plate 5 drives the movable plate 6 to move synchronously, so that the first gear 11 on the shaft of the positioning take-up roller 8 will mesh with the first rack 13 installed on the protective plate 12, thereby driving the positioning take-up roller 8 to rotate. This allows the two positioning take-up rollers 8 to synchronously take up both ends of the fabric, gradually tightening the fabric. The initial positioning of the fabric is achieved by winding the ends of the fabric.

[0024] Guide rods 7 are symmetrically fixedly installed on the movable plate 6, and the guide rods 7 slide through the mounting plate 5. The air supply assembly includes a fixed rod 14 fixedly installed on the movable plate 6, and a sealing plug 15 is fixedly installed at the end of the fixed rod 14. A fixed cylinder 16 is fixedly installed on the mounting plate 5, and an elastic element, which is a spring, is fixedly connected between the sealing plug 15 and the fixed cylinder 16. The movable plate 6 moves relative to the mounting plate 5 after the fabric is tightened. An air storage bladder 17 is provided between the sealing plug 15 and the fixed cylinder 16. When the mounting plate 5 and the movable plate 6 move relative to each other, the sealing plug 15 squeezes the air storage bladder 17. A first air supply pipe 18 is connected to the outside of the air storage bladder 17, and the shaft of the positioning take-up roller 8 is fixedly provided with a connection to the elastic bladder 22. The first fixed tube 20 is sealed and rotatably connected to the first air supply tube 18. After the air storage bladder 17 is compressed, air is supplied to the inside of the elastic bladder 22. After the elastic bladder 22 is inflated, it protrudes outward through the reserved hole 23. The expanded and protruding part of the elastic bladder 22 is in close contact with the fabric outside the positioning take-up roller 8. The sealing plug 15 and the fixed cylinder 16 are sealed and slidably connected. The end of the fixed cylinder 16 away from the mounting plate 5 is fixedly connected to the second air supply tube 19. The other end of the positioning take-up roller 8 is fixedly connected to the second fixed tube 21. The second air supply tube 19 and the second fixed tube 21 are rotatably connected. The second fixed tube 21 is connected to the cavity 24. The air hole 25 is sealed and attached to the fabric wound on the outside of the positioning take-up roller 8.

[0025] After the fabric is taut, the moving plate 4 continues to move, causing the mounting plate 5 and the movable plate 6 to shift relative to each other. At this time, the fixing rod 14 pulls the sealing plug 15 to slide inside the fixing cylinder 16, causing the sealing plug 15 to squeeze the air storage bladder 17. This causes the gas in the air storage bladder 17 to be filled into the elastic bladder 22 through the first air supply pipe 18 and the first fixing pipe 20, causing the air storage bladder 17 to expand. The expanded part of the air storage bladder 17 protrudes from the surface of the positioning take-up roller 8 through the reserved hole 23 and is in close contact with the wound fabric. By applying radial force, the wound part of the fabric is further taut. At the same time, the fixing cylinder 16 will draw air from the cavity 24 of the positioning take-up roller 8 through the second air supply pipe 19 and the second fixing pipe 21. The fabric that has been tightly wound several times has a certain sealing effect, so that the air hole 25 can generate suction on the wound fabric, further preventing the fabric ends from loosening and achieving adaptive adjustment. As the moving plate 4 continues to move, a stable tension can be applied to the fabric to achieve strength testing.

[0026] Example 2: The technical content disclosed in this example is a further improvement based on Example 1. Most existing fabric strength testing institutions use a single tensile testing method to measure the tensile strength of fabrics. However, rescue clothing encounters various complex external forces during actual use, resulting in relatively simple test data. To further solve this technical problem, this example discloses the following technical content: Figure 3 and Figure 8 As shown; the movable plate 6 is also equipped with a piercing component for rotating and piercing the fabric.

[0027] The puncture assembly includes an adjusting screw 26 that rotates on the outside of the mounting plate 5, and an adjusting plate 27 is threadedly connected to the outside of the adjusting screw 26. A second rack 28 is symmetrically arranged on the adjusting plate 27. The second rack 28 slides through the mounting plate 5. The puncture assembly also includes a second gear 29 that is rotatably mounted on a movable plate 6. During the relative movement of the mounting plate 5 and the movable plate 6, the second rack 28 and the second gear 29 are meshed. A puncture element 30 is fixedly mounted on the shaft of the second gear 29. During the rotation of the second gear 29, the puncture element 30 is driven to puncture the taut fabric.

[0028] After the fabric tensile strength test is completed, the moving plate 4 is moved to make the second rack 28 mesh with the second gear 29, thereby driving the second gear 29 to rotate. This allows the piercing part 30 on the shaft of the second gear 29 to rotate and pierce the taut fabric, achieving further piercing strength testing and effectively ensuring the comprehensiveness of the fabric test data. By rotating the adjusting screw 26, the adjusting plate 27 can be driven to slide the second rack 28 on the mounting plate 5 to adjust the driving conditions of the piercing assembly.

[0029] The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] 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 strength testing mechanism for composite fabric of rescue clothing, comprising a body (1), wherein a motor (2) is fixedly installed on the body (1), and a bidirectional lead screw (3) is rotatably installed on the body (1), and the motor (2) drives the bidirectional lead screw (3) to rotate, and a movable plate (4) is symmetrically slidably arranged on the body (1), and the bidirectional lead screw (3) and the movable plate (4) are threadedly connected; Its features are, A mounting plate (5) is fixed on the movable plate (4), and a movable plate (6) is elastically slidably mounted on the mounting plate (5). A positioning take-up roller (8) is rotatably mounted on the movable plate (6), and a preliminary positioning component for positioning both ends of the fabric is provided on the positioning take-up roller (8). A protective plate (12) is fixedly mounted on the machine body (1), and a transmission component is provided between the positioning take-up roller (8) and the protective plate (12). During the movement of the movable plate (6) driven by the mounting plate (5), the transmission component drives the positioning take-up roller (8) to rotate. A fixed cylinder (16) is fixedly mounted on the outer side of the mounting plate (5), and the movable plate (6) and the fixed cylinder (16) are connected. An air supply component is provided between 16), the inner side of the positioning take-up roller (8) is filled with an elastic bladder (22), and a reserved hole (23) is provided on the positioning take-up roller (8). After the elastic bladder (22) expands, it protrudes outward through the reserved hole (23). A cavity (24) is provided inside the positioning take-up roller (8), and air holes (25) communicating with the cavity (24) are also evenly provided on the positioning take-up roller (8). During the relative displacement of the mounting plate (5) and the movable plate (6), the air pressure inside the elastic bladder (22) and the cavity (24) is adjusted by the air supply component. A piercing component for rotating and piercing the fabric is also provided on the movable plate (6).

2. The strength testing mechanism for a composite fabric of a rescue suit according to claim 1, characterized in that: The preliminary positioning component includes a limiting perforation (9) through the positioning take-up roller (8), and the limiting perforation (9) is fitted with the fabric gap. An adhesive (10) is fixedly provided on the outside of the positioning take-up roller (8), and the adhesive (10) is fixedly bonded to the end edge of the fabric.

3. The strength testing mechanism for a composite fabric of a rescue suit according to claim 2, characterized in that: The transmission assembly includes a first gear (11) fixedly installed on the outside of the shaft of the positioning take-up roller (8) and a first rack (13) fixedly installed on the protective plate (12). The first gear (11) and the first rack (13) are meshed and connected. When the mounting plate (5) drives the movable plate (6) to move, the first gear (11) and the first rack (13) mesh and drive the positioning take-up roller (8) to rotate. During the rotation of the positioning take-up roller (8), the end of the fabric is synchronously taken up.

4. The strength testing mechanism for a composite fabric of a rescue suit according to claim 1, characterized in that: Guide rods (7) are symmetrically fixedly installed on the movable plate (6), and the guide rods (7) slide through the mounting plate (5). The air supply assembly includes a fixed rod (14) fixedly installed on the movable plate (6), and a sealing plug (15) is fixedly installed at the end of the fixed rod (14). A fixed cylinder (16) is fixedly installed on the mounting plate (5), and an elastic element is fixedly connected between the sealing plug (15) and the fixed cylinder (16). The movable plate (6) and the mounting plate (5) are relatively displaced after the fabric is tightened.

5. The strength testing mechanism for a composite fabric of a rescue suit according to claim 4, characterized in that: An air storage bladder (17) is provided between the sealing plug (15) and the fixed cylinder (16). When the mounting plate (5) and the movable plate (6) move relative to each other, the sealing plug (15) squeezes the air storage bladder (17). A first air supply pipe (18) is connected to the outside of the air storage bladder (17). A first fixed pipe (20) is fixedly provided through the shaft of the positioning take-up roller (8) and connected to the elastic bladder (22). The first air supply pipe (18) and the first fixed pipe (20) are sealed and rotated.

6. The strength testing mechanism for a composite fabric of a rescue suit according to claim 5, characterized in that: After being compressed, the air storage bladder (17) supplies air to the inside of the elastic bladder (22), and after the elastic bladder (22) is inflated, it protrudes outward through the reserved hole (23), and the protruding part of the elastic bladder (22) is in close contact with the fabric outside the positioning take-up roller (8).

7. The strength testing mechanism for a composite fabric of a rescue suit according to claim 4, characterized in that: The sealing plug (15) and the fixed cylinder (16) are slidably connected in a sealed manner. The end of the fixed cylinder (16) away from the mounting plate (5) is fixedly connected to the second air supply pipe (19). The other end of the positioning take-up roller (8) is fixedly connected to the second fixed pipe (21). The second air supply pipe (19) and the second fixed pipe (21) are rotatably connected. The second fixed pipe (21) is connected to the cavity (24). The air hole (25) is sealed and attached to the fabric wound on the outside of the positioning take-up roller (8).

8. The strength testing mechanism for a composite fabric of a rescue suit according to claim 1, characterized in that: The puncture assembly includes an adjusting screw (26) that rotates on the outside of the mounting plate (5), and an adjusting plate (27) is threadedly connected to the outside of the adjusting screw (26). A second rack (28) is symmetrically arranged on the adjusting plate (27), and the second rack (28) slides through the mounting plate (5).

9. The strength testing mechanism for a composite fabric of a rescue suit according to claim 8, characterized in that: The puncture assembly also includes a second gear (29) rotatably mounted on the movable plate (6), and the second rack (28) and the second gear (29) mesh with each other during the relative movement of the mounting plate (5) and the movable plate (6), and the shaft of the second gear (29) is fixedly mounted with a puncture member (30), and the second gear (29) drives the puncture member (30) to puncture the taut fabric during the rotation of the second gear (29).

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