Cloth ultraviolet-proof detection device and detection method thereof

Abstract

The invention provides a cloth ultraviolet-proof detection device and a detection method thereof, and relates to the technical field of cloth detection.The cloth ultraviolet-proof detection device comprises a detection bin and a guide fixing assembly, an ultraviolet lamp is arranged at the top of the interior of the detection bin, an ultraviolet detection card is placed at the bottom of the interior of the detection bin, and through openings are formed in the two ends of the detection bin; the two groups of guide fixing assemblies are movably arranged on the two sides of the interior of the detection bin respectively; the second motor drives the second two-way threaded lead screw to drive the upper extrusion cylinder and the lower extrusion cylinder to move relatively, so that the cloth is fixed by the clamping blocks; the first bidirectional threaded lead screw is driven by the gear motor to drive the movement bins on the two sides to move outwards oppositely, accurate stretching of the cloth is achieved, based on the structure, the ultraviolet-proof performance of the cloth in the natural state can be detected firstly, then the performance of the cloth in the stretching state is detected, the stretching working condition of the cloth in the wearing and using process is effectively simulated, and the working efficiency is improved. And the detection result better meets the actual application requirement.

Description

Technical Field

[0001] This invention relates to the field of fabric testing technology, and in particular to a device and method for testing the UV protection of fabrics. Background Technology

[0002] In the field of UV protection performance testing for fabrics, the current mainstream testing method is centered on manual operation. The conventional procedure is as follows: the operator manually lays the fabric to be tested flat on a workbench or simple frame, and fixes the edges of the fabric with simple tools such as clips and pressure strips; then, holding a UV lamp, the operator irradiates the fabric at a preset distance (usually 10-30cm), while simultaneously placing a UV test card directly under the fabric, so that the UV rays penetrating the fabric directly act on the surface of the test card; after a preset irradiation time (usually 1-5 minutes), the operator removes the test card and compares it with a standard color chart to determine the fabric's UV protection performance. Although some simple testing equipment can fix the installation position of the UV lamp, the positioning and conveying of the fabric and the replacement of the test card still need to be done manually, and the entire testing process relies on manual intervention.

[0003] Existing detection technologies have several shortcomings: First, the instability of manual operation affects the accuracy of detection. When holding a UV lamp, deviations in the irradiation angle and distance from the fabric are prone to occur. Furthermore, when manually pulling the fabric to adjust the detection position, uneven conveying speed leads to inconsistent UV irradiation doses on the fabric surface, resulting in fluctuating test results. Second, there is a lack of detection capabilities under tension. Fabrics are often under varying degrees of tension in practical applications, and tension alters the fiber density and pore structure of the fabric, directly affecting its UV protection performance. However, existing technologies can only detect the performance of fabrics in their naturally relaxed state and cannot assess the protective effect in actual use scenarios. Therefore, this invention proposes a UV protection detection device and method for fabrics to address the problems existing in the prior art. Summary of the Invention

[0004] To address the aforementioned issues, this invention proposes a device and method for detecting the UV protection performance of fabrics. This device first detects the UV protection performance of the fabric in its natural state, and then detects its performance under tension. It effectively simulates the stretching conditions of the fabric during wear and use, filling the gap in existing technologies that cannot assess the UV protection performance after stretching, and making the test results more consistent with actual application needs.

[0005] To achieve the purpose of this invention, the invention is implemented through the following technical solution: a detection device for UV protection of fabric, comprising a detection chamber and a guide fixing assembly, wherein a UV lamp is provided at the top inside the detection chamber and a UV detection card is placed at the bottom inside the detection chamber, and both ends of the detection chamber are provided with openings; The guide fixing assembly has two sets and is movably installed on both sides inside the detection chamber. The guide fixing assembly includes a motion chamber and a squeezing cylinder. The squeezing cylinder has two sets and is movably installed on the upper and lower front ends of the motion chamber. The inner end of the squeezing cylinder is elastically rotatably provided with a guide roller, and both sides of the inner end of the squeezing cylinder are provided with clamping blocks.

[0006] A further improvement is that: a receiving slot is provided at the bottom of the inside of the detection chamber, and the receiving slot is used to hold the ultraviolet detection card, and an insertion port is provided on the detection chamber at the front end of the receiving slot.

[0007] A further improvement is that a closed door is provided above the front end of the detection chamber, and a handle is provided on one side of the closed door.

[0008] A further improvement is that a front support plate is provided on the detection chamber located below the opening on the left side, and a rear support plate is provided on the detection chamber located below the opening on the right side.

[0009] A further improvement is that: both ends of the rear support plate are provided with hinge arms, and the hinge arms are elastically hinged to the rear support plate through torsion springs; a drive roller is hinged between the two sets of hinge arms, and the drive roller is driven to rotate by a first motor.

[0010] A further improvement is that a guide rod is provided at the rear end of the detection chamber, and both sets of motion chambers are movably mounted on the guide rod.

[0011] A further improvement is that a first bidirectional threaded screw is rotatably provided at the middle position of the rear end inside the detection chamber. The two ends of the first bidirectional threaded screw pass through the two sets of motion chambers respectively and are threadedly matched. The first bidirectional threaded screw is driven to rotate by a reduction motor.

[0012] A further improvement is that: the front end of the exercise chamber is provided with mounting slots at both the top and bottom, and a second bidirectional threaded screw is rotatably provided inside the mounting slots at both the top and bottom. Moving blocks are movably provided on the mounting slots at both the top and bottom. The two ends of the second bidirectional threaded screw pass through the two sets of moving blocks and are threadedly matched. The second bidirectional threaded screw is driven to rotate by a second motor. The extrusion cylinders at the top and bottom are respectively connected to the moving blocks at the top and bottom.

[0013] A further improvement is that the guide roller is rotatably mounted on the inner side of the bracket, and the bracket is located inside the extrusion cylinder. One end of the extrusion cylinder is provided with a top plate. The bracket is provided with an insertion rod, which moves through the top plate and is limited by a limiting piece. A spring is provided between the bracket and the top plate, and the spring is located outside the insertion rod.

[0014] A method for testing the UV protection of fabric includes the following steps: S1: Place the ultraviolet detection card at the bottom of the detection chamber to ensure that the inside of the detection chamber forms a closed space; S2: Insert one end of the fabric to be tested into the testing chamber through the left opening, pass it between the two sets of guide fixing components, so that the fabric is located between the guide rollers of the upper and lower sets of extrusion cylinders and moves at a constant speed; S3: Turn on the ultraviolet lamp. The ultraviolet light emitted by the ultraviolet lamp shines on the fabric. The ultraviolet light that is not blocked by the fabric penetrates the fabric and shines on the ultraviolet detection card below. S4: Take out the UV test card, judge the UV protection performance of the fabric by observing the degree of color change of the test card, and then insert a new UV test card; S5: Stop the movement of the fabric, drive the upper and lower extrusion cylinders to move relative to each other on the motion chamber, and extrude the guide rollers so that the guide rollers retract into the extrusion cylinders, and hold the fabric by the clamping blocks; S6: Drive the movement chambers on both sides to move outward relative to each other, stretching the fabric. Under these conditions, turn on the ultraviolet lamp for a second test. After completion, remove the ultraviolet detection card and judge the fabric's UV protection performance by observing the degree of color change on the detection card. The lighter the color change, the better the fabric's UV protection effect.

[0015] The beneficial effects of this invention are as follows: 1. This invention uses a second motor to drive a second bidirectional threaded screw, which in turn drives the upper and lower extrusion cylinders to move relative to each other, thus fixing the fabric with clamping blocks. Then, a geared motor drives a first bidirectional threaded screw, which drives the two side moving chambers to move outward relative to each other, achieving precise stretching of the fabric. Based on this structure, the UV protection performance of the fabric in its natural state can be tested first, and then the performance under stretching can be tested. This effectively simulates the stretching conditions of the fabric during wearing and use, filling the gap in existing technologies that cannot evaluate the UV protection performance after stretching, and making the test results more in line with actual application needs.

[0016] 2. This invention achieves automated fabric conveying through a drive roller and a guide fixing assembly. The drive roller is driven by a motor to rotate, which can precisely control the movement speed of the fabric and avoid speed fluctuations when the fabric is manually pulled. The ultraviolet lamp is fixedly installed on the top of the detection chamber, and the irradiation angle and distance are kept constant to ensure that the irradiation dose of ultraviolet light on the fabric surface is consistent. The detection card can be quickly picked up and put in through the receiving slot and the insertion port, without the need to manually adjust the position of the detection card, which significantly reduces human error and improves batch detection efficiency.

[0017] 3. The guide roller of this invention is elastically connected to the extrusion cylinder by a spring. During the fabric conveying process, the spring can adaptively adjust the pressure of the guide roller according to the fabric thickness to avoid damage to the fabric fibers caused by rigid clamping. It is suitable for testing fabrics of different materials and thicknesses. It can also be retracted into the extrusion cylinder during fixed clamping, making it versatile in function. The closed door of the testing chamber can block ultraviolet rays during the testing process. The front support plate and the rear support plate assist the fabric in entering and exiting the testing chamber, respectively, to avoid deviation and wrinkles during fabric conveying, further ensuring the stability and reliability of the testing process. Attached Figure Description

[0018] Figure 1 This is the front view of the present invention; Figure 2 This is a schematic diagram of the internal structure of the present invention; Figure 3 This is a schematic diagram of the extrusion cylinder of the present invention; Figure 4 This is a schematic diagram of the motion chamber of the present invention; Figure 5 This is a schematic diagram of the inside of the extrusion cylinder of the present invention.

[0019] The components are as follows: 1. Detection chamber; 2. Ultraviolet lamp; 3. Through port; 4. Motion chamber; 5. Extrusion cylinder; 6. Guide roller; 7. Clamping block; 8. Receiving groove; 9. Insertion port; 10. Sealing door; 11. Front support plate; 12. Rear support plate; 13. Hinge arm; 14. Drive roller; 15. First motor; 16. Guide rod; 17. First bidirectional threaded screw; 18. Mounting groove; 19. Second bidirectional threaded screw; 20. Motion block; 21. Second motor; 22. Bracket; 23. Top plate; 24. Insert rod; 25. Limiting plate; 26. Spring. Detailed Implementation

[0020] To enhance understanding of the present invention, the present invention will be further described in detail below with reference to embodiments. These embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0021] Example 1 according to Figure 1 , 2 As shown in Figures 3, 4, and 5, this embodiment proposes a fabric UV protection detection device, including a detection chamber 1 and a guide fixing assembly. The top of the detection chamber 1 is equipped with a UV lamp 2, and the bottom of the detection chamber 1 is equipped with a UV detection card. Both ends of the detection chamber 1 are provided with openings 3. The guide fixing assembly has two sets and is movably installed on both sides inside the detection chamber 1. The guide fixing assembly includes a motion chamber 4 and a squeezing cylinder 5. The squeezing cylinder 5 has two sets and is movably installed on the upper and lower front ends of the motion chamber 4. The inner end of the squeezing cylinder 5 is elastically rotatably provided with a guide roller 6, and both sides of the inner end of the squeezing cylinder 5 are provided with clamping blocks 7. The testing chamber 1 provides a closed space for the testing process, preventing external light and airflow from interfering with the accuracy of ultraviolet irradiation. The ultraviolet lamp 2, as the ultraviolet emission source, can stably output ultraviolet light of a preset intensity, providing a standardized light source for testing the UV protection performance of the fabric. The ultraviolet detection card changes color when it receives ultraviolet light that penetrates the fabric, and the degree of color change can intuitively reflect the fabric's ability to block ultraviolet light. The opening 3 is the entry and exit channel for the fabric to be tested, ensuring that the fabric can pass smoothly through the testing chamber 1 to complete the test. Two sets of guiding and fixing components correspond to the two ends of the fabric, respectively. The movement of the moving chamber 4 achieves the stretching of the fabric, and the relative movement of the extrusion cylinder 5 achieves the clamping and guiding of the fabric. When the guide roller 6 rotates elastically, it can fit against the surface of the fabric and rotate synchronously with the fabric conveying, which not only avoids friction damage during fabric conveying, but also plays a positioning and guiding role for the fabric, preventing the fabric from deviating. The clamping block 7 can fit against the surface of the fabric when the extrusion cylinder 5 moves relative to it, achieving rigid fixation of the fabric and providing a stable clamping foundation for subsequent tensile testing.

[0022] The detection chamber 1 has a receiving slot 8 at its lower part inside, which is used to hold ultraviolet (UV) detection cards. The detection chamber 1 has an insertion port 9 at the front end of the receiving slot 8. The receiving slot 8 uses a physical structure to position the UV detection cards, ensuring that the cards are always placed in the same position, avoiding differences in UV irradiation area due to card misalignment, which would affect the repeatability of the test results. The insertion port 9 is the channel for taking and placing the detection cards, allowing operators to quickly change cards without opening the detection chamber 1. This simplifies the operation process, reduces UV leakage within the detection chamber 1, and prevents contamination of the detection cards from the external environment.

[0023] A closed door 10 is provided above the front end of the detection chamber 1, and a handle is provided on one side of the closed door 10. When closed, the closed door 10 forms a completely enclosed space with the detection chamber 1, which on the one hand prevents the ultraviolet rays emitted by the ultraviolet lamp 2 from leaking into the outside world, avoiding skin and eye damage to the operator, and on the other hand isolates the ultraviolet components in the outside natural light, preventing external ultraviolet rays from interfering with the color change reaction of the detection card and ensuring the accuracy of the test results; the handle allows the operator to quickly open or close the closed door 10, improving the ease of operation of the equipment.

[0024] A front support plate 11 is provided on the detection chamber 1 located below the opening 3 on the left side, and a rear support plate 12 is provided on the detection chamber 1 located below the opening 3 on the right side. The front support plate 11 supports the fabric before it enters the detection chamber 1, and the rear support plate 12 supports the fabric after it exits the detection chamber 1. Together, they prevent the fabric from sagging due to its own weight, which could cause wrinkles or shifting during transport. This ensures that the fabric always passes through the detection chamber 1 in a flat state, guaranteeing the uniformity of ultraviolet irradiation on the fabric surface.

[0025] Both ends of the rear support plate 12 are provided with hinged arms 13, and the hinged arms 13 are elastically hinged to the rear support plate 12 through torsion springs. A drive roller 14 is hinged between the two sets of hinged arms 13, and the drive roller 14 is driven to rotate by a first motor 15. The first motor 15 can output stable rotational power to drive the drive roller 14 to rotate at a preset speed. The torsion springs use elastic force to keep the hinged arms 13 and the drive roller 14 in constant contact with the fabric surface. The friction between the drive roller 14 and the fabric drives the fabric to move at a uniform speed along the opening 3, realizing precise control of the fabric conveying speed and avoiding detection errors caused by speed fluctuations when the fabric is manually pulled.

[0026] The rear end of the detection chamber 1 is equipped with a guide rod 16, and both sets of motion chambers 4 are movably mounted on the guide rod 16. The guide rod 16 provides linear motion guidance for the motion chambers 4, restricting the motion chambers 4 to move only along the axial direction of the guide rod 16 (i.e., the stretching direction of the fabric), preventing the motion chambers 4 from shifting laterally or rotating during movement, ensuring the synchronization and stability of the movement of the two sets of motion chambers 4 when stretching the fabric, and ensuring uniform stretching force of the fabric.

[0027] A first bidirectional threaded screw 17 is rotatably mounted at the middle position of the rear end inside the detection chamber 1. Both ends of the first bidirectional threaded screw 17 pass through and are threadedly fitted to the two sets of motion chambers 4. The first bidirectional threaded screw 17 is driven to rotate by a geared motor. The geared motor can output low-speed, high-torque rotational power, driving the first bidirectional threaded screw 17 to rotate smoothly. Because the threads at both ends of the screw have opposite directions and are threadedly fitted to the two sets of motion chambers 4 respectively, when the screw rotates, it can drive the two sets of motion chambers 4 to move simultaneously along the guide rod 16 in a relative (closer) or opposite (farther) manner. When the motion chambers 4 move in opposite directions, a uniform tensile force can be applied to the fabric through the guide fixing component, achieving precise control of the fabric's stretch level.

[0028] The front end of the motion chamber 4 is provided with mounting grooves 18 at both the upper and lower sides. A second bidirectional threaded screw 19 is rotatably mounted inside each mounting groove 18. Motion blocks 20 are movably mounted on each mounting groove 18. The two ends of the second bidirectional threaded screw 19 pass through two sets of motion blocks 20 and are threadedly fitted. The second bidirectional threaded screw 19 is driven to rotate by a second motor 21. The upper and lower extrusion cylinders 5 are respectively connected to the upper and lower motion blocks 20. The second motor 21 drives the second bidirectional threaded screw 19 to rotate. The opposite threads at both ends of the screw can drive the upper and lower sets of motion blocks 20 to move relative to each other (closer) or opposite to each other (away from each other) within the mounting grooves 18. The motion blocks 20 drive the extrusion cylinders 5 to move synchronously. When the motion blocks 20 move relative to each other, the extrusion cylinders 5 can move closer to the fabric, achieving the guiding roller 6's fit and guide of the fabric or the clamping block 7's clamping and fixing of the fabric. When the motion blocks 20 move in opposite directions, the extrusion cylinders 5 move away from the fabric, facilitating the insertion or removal of the fabric.

[0029] The guide roller 6 is rotatably mounted on the inner side of the bracket 22, and the bracket 22 is located inside the extrusion cylinder 5. One end of the extrusion cylinder 5 is provided with a top plate 23. The bracket 22 is provided with an insertion rod 24, which moves through the top plate 23 and is limited by a limiting piece 25. A spring 26 is provided between the bracket 22 and the top plate 23, and the spring 26 is located outside the insertion rod 24. When the spring 26 is in its natural state, it can apply an elastic force to the bracket 22 in the direction of the fabric, so that the guide roller 6 always fits against the fabric surface. Even if there are slight differences in the fabric thickness, the spring 26 can adaptively adjust the position of the guide roller 6 by extending and retracting to ensure a stable guiding effect. The insert rod 24 can move linearly along the perforation of the top plate 23, restricting the bracket 22 to move only along the axis of the extrusion cylinder 5, and preventing the guide roller 6 from deviating. The limiting piece 25 can prevent the insert rod 24 from coming out of the perforation of the top plate 23, ensuring the connection stability between the bracket 22 and the extrusion cylinder 5. The upper and lower extrusion cylinders 5 are driven to move relative to each other on the motion chamber 4, and the extrusion guide roller 6 is extruded to retract into the extrusion cylinder 5, and the fabric is held by the clamping block 7.

[0030] Example 2 according to Figure 1 , 2 As shown in Figures 3, 4, and 5, this embodiment proposes a method for detecting the UV protection of fabrics, including the following steps: S1: Place the ultraviolet detection card at the bottom of the detection chamber 1 to ensure that the inside of the detection chamber 1 forms a closed space; S2: Insert one end of the fabric to be tested into the testing chamber 1 through the left opening 3, pass between the two sets of guide fixing components, so that the fabric is located between the guide rollers 6 of the upper and lower sets of extrusion cylinders 5 and moves at a constant speed. S3: Turn on UV lamp 2. The UV light emitted by UV lamp 2 shines on the fabric. The UV light that is not blocked by the fabric penetrates the fabric and shines on the UV detection card below. S4: Take out the UV test card, judge the UV protection performance of the fabric by observing the degree of color change of the test card, and then insert a new UV test card; S5: Stop the movement of the fabric, drive the upper and lower extrusion cylinders 5 to move relative to each other on the motion chamber 4, and extrude the guide roller 6 so that the guide roller 6 retracts into the extrusion cylinder 5, and clamps the fabric through the clamping block 7. S6: Drive the two side motion chambers 4 to move outward relative to each other, stretching the fabric. Under these conditions, turn on the ultraviolet lamp 2 to conduct a second test. After completion, take out the ultraviolet detection card and judge the ultraviolet protection performance of the fabric by observing the degree of color change of the detection card. The lighter the color change, the better the ultraviolet protection effect of the fabric.

[0031] The enclosed testing chamber, constructed via S1, isolates the fabric from external light and airflow interference, preventing external ultraviolet radiation from affecting the initial state of the test card and preventing ultraviolet leakage during testing. This provides a standardized environment for subsequent testing, improving accuracy. In S2, the fabric is positioned by guide rollers and moves at a uniform speed with drive roller 14, ensuring stable fabric conveying speed and preventing positional shifts within the testing chamber. This avoids differences in ultraviolet radiation dose due to uneven fabric movement, ensuring uniform and reliable test results. S3-S4 utilize the combination of ultraviolet lamp 2 irradiation and test card color change, allowing for intuitive observation of the test card's color change to determine the fabric's UV protection performance without complex instruments. The test card can be quickly replaced via a connector, simplifying the operation and improving testing efficiency. S5-S6 clamp the fabric before stretching it for testing, simulating the stretching conditions of actual wear and use. This fills the gap in testing only the naturally relaxed state, making the test results more closely match the needs of real-world applications. The entire process includes two tests: one in the natural state (S2-S4) and the other in the stretched state (S5-S6). By comparing the degree of color change on the two test cards, the stability of the fabric's UV protection performance under different conditions can be comprehensively evaluated, providing a more sufficient basis for judging the quality of the fabric.

[0032] This invention uses a second motor 21 to drive a second bidirectional threaded screw 19, which in turn drives the upper and lower extrusion cylinders 5 to move relative to each other, thus fixing the fabric with clamping blocks 7. Then, a reduction motor drives a first bidirectional threaded screw 17, which in turn drives the two side moving chambers 4 to move outwards relative to each other, achieving precise stretching of the fabric. Based on this structure, the UV protection performance of the fabric in its natural state can be tested first, followed by its performance under stretching conditions. This effectively simulates the stretching conditions of the fabric during wear and use, filling the gap in existing technologies that cannot assess UV protection performance after stretching, making the test results more consistent with actual application needs. Furthermore, the automatic conveying of the fabric is achieved through a drive roller 14 and a guide fixing assembly. The drive roller 14 is driven by a motor to rotate, precisely controlling the fabric's movement speed and avoiding speed fluctuations when manually pulling the fabric. The UV lamp is fixedly installed on the top of the testing chamber, maintaining a constant irradiation angle and distance to ensure consistent UV irradiation dose on the fabric surface. The test card is quickly placed and removed through the receiving slot 8 and the insertion port 9, eliminating the need for manual adjustment of the test card position, significantly reducing human error and improving batch testing efficiency. Meanwhile, the guide roller 6 is elastically connected to the extrusion cylinder 5 via the spring 26. During the fabric conveying process, the spring 26 can adaptively adjust the pressure of the guide roller according to the fabric thickness to avoid damage to the fabric fibers caused by rigid clamping. It is suitable for testing fabrics of different materials and thicknesses. It can also be retracted into the extrusion cylinder 5 during fixed clamping, making it versatile in function. The closed door 10 of the testing chamber 1 can block ultraviolet rays during the testing process. The front support plate 11 and the rear support plate 12 respectively assist the fabric in entering and exiting the testing chamber 1, avoiding deviation and wrinkles during fabric conveying, and further ensuring the stability and reliability of the testing process.

[0033] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the UV resistance of fabric, comprising a detection chamber (1) and a guide and fixing assembly, characterized in that: The top of the detection chamber (1) is equipped with an ultraviolet lamp (2), and the bottom of the detection chamber (1) is equipped with an ultraviolet detection card. Both ends of the detection chamber (1) are equipped with openings (3). The guide fixing assembly has two sets and is movably installed on both sides inside the detection chamber (1). The guide fixing assembly includes a motion chamber (4) and a squeezing cylinder (5). The squeezing cylinder (5) has two sets and is movably installed on the upper and lower front ends of the motion chamber (4). The inner end of the squeezing cylinder (5) is elastically rotatably provided with a guide roller (6), and both sides of the inner end of the squeezing cylinder (5) are provided with clamping blocks (7).

2. The fabric UV protection detection device according to claim 1, characterized in that: The detection chamber (1) is provided with a receiving slot (8) at the bottom inside, and the receiving slot (8) is used to receive the ultraviolet detection card. The detection chamber (1) at the front end of the receiving slot (8) is provided with an insertion port (9).

3. The fabric UV protection detection device according to claim 1, characterized in that: The detection chamber (1) has a closed door (10) above the front end, and a handle is provided on one side of the closed door (10).

4. The fabric UV protection detection device according to claim 1, characterized in that: A front support plate (11) is provided on the detection chamber (1) located below the opening (3) on the left side, and a rear support plate (12) is provided on the detection chamber (1) located below the opening (3) on the right side.

5. The fabric UV protection detection device according to claim 4, characterized in that: Both ends of the rear support plate (12) are provided with hinge arms (13), and the hinge arms (13) are elastically hinged to the rear support plate (12) through torsion springs. A drive roller (14) is hinged between the two sets of hinge arms (13), and the drive roller (14) is driven to rotate by the first motor (15).

6. The fabric UV protection detection device according to claim 1, characterized in that: The detection chamber (1) has a guide rod (16) at its rear end, and both sets of motion chambers (4) are movably mounted on the guide rod (16).

7. The fabric UV protection detection device according to claim 6, characterized in that: The detection chamber (1) is provided with a first bidirectional threaded screw (17) at the middle position of the rear end. The two ends of the first bidirectional threaded screw (17) pass through the two sets of motion chambers (4) respectively and are threadedly matched. The first bidirectional threaded screw (17) is driven to rotate by a reduction motor.

8. The fabric UV protection detection device according to claim 1, characterized in that: The front end of the motion chamber (4) is provided with mounting slots (18) at both the top and bottom. A second bidirectional threaded screw (19) is rotatably mounted inside the mounting slots (18) at both the top and bottom. Motion blocks (20) are movably mounted on the mounting slots (18) at both the top and bottom. The two ends of the second bidirectional threaded screw (19) pass through the two sets of motion blocks (20) respectively and are threadedly matched. The second bidirectional threaded screw (19) is driven to rotate by the second motor (21). The extrusion cylinders (5) at the top and bottom are respectively connected to the motion blocks (20) at the top and bottom.

9. The fabric UV protection detection device according to claim 1, characterized in that: The guide roller (6) is rotatably mounted on the inner side of the bracket (22), and the bracket (22) is located inside the extrusion cylinder (5). One end of the extrusion cylinder (5) is provided with a top plate (23). The bracket (22) is provided with a rod (24), and the rod (24) moves through the top plate (23) and is limited by a limiting piece (25). A spring (26) is provided between the bracket (22) and the top plate (23), and the spring (26) is located outside the rod (24).

10. A method for detecting the UV protection of fabric, using the UV protection detection device for fabric described in any one of claims 1-9, characterized in that, Includes the following steps: S1: Place the ultraviolet detection card at the bottom of the detection chamber (1) to ensure that the inside of the detection chamber (1) forms a closed space; S2: Place one end of the fabric to be tested into the testing chamber (1) through the left opening (3), pass it between the two sets of guide fixing components, so that the fabric is located between the guide rollers (6) of the upper and lower sets of extrusion cylinders (5) and moves at a constant speed; S3: Turn on the ultraviolet lamp (2). The ultraviolet light emitted by the ultraviolet lamp (2) shines on the fabric. The ultraviolet light that is not blocked by the fabric penetrates the fabric and shines on the ultraviolet detection card below. S4: Take out the UV test card, judge the UV protection performance of the fabric by observing the degree of color change of the test card, and then insert a new UV test card; S5: Stop the movement of the fabric, drive the upper and lower extrusion cylinders (5) to move relative to each other on the motion chamber (4), and extrude the guide roller (6) so that the guide roller (6) retracts into the extrusion cylinder (5) and the fabric is held by the clamping block (7); S6: Drive the two sides of the motion chamber (4) to move outward relative to each other to stretch the fabric. Under this condition, turn on the ultraviolet lamp (2) to conduct a second test. After completion, take out the ultraviolet detection card and judge the ultraviolet protection performance of the fabric by observing the degree of color change of the detection card. The lighter the color change, the better the ultraviolet protection effect of the fabric.

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