A device for detecting the air permeability of a woven fabric

Abstract

The utility model belongs to the technical field of weaving cloth detection equipment, concretely is a kind of weaving cloth air permeability detection device, including body, the inside of body is slidably provided with the arc-shaped tensioning member of top, the inside of body is provided with collecting box below the tensioning member, and opening and closing valve is arranged between collecting box and tensioning member, one end of opening and closing valve is connected with tensioning member, and the end face of body is provided with mounting bracket, the inside of mounting bracket is slidably provided with detection box, the inside of detection box is slidably provided with mounting frame, the inside of mounting frame is provided with elastic member, the bottom end face of detection box is rotatably provided with movable hook, and movable hook is correspondingly provided with elastic member, the utility model solves the problem that textile thread can form air hole due to air pressure by setting tensioning member and top pressing block, and can fix cloth, provide the stability of cloth, and the problem that the detection of cloth surface is affected by adhered impurities is solved by setting elastic member and collecting box.

Description

Technical Field

[0001] This utility model belongs to the technical field of woven fabric testing equipment, and in particular relates to a device for testing the air permeability of woven fabrics. Background Technology

[0002] Woven fabrics are made by weaving yarns together in the warp and weft directions on a loom. The weave structure is generally divided into three main categories: plain weave, twill weave, and satin weave, as well as their variations. To avoid affecting the quality of the finished product due to differences in air permeability, it is necessary to sample and test the air permeability of woven fabrics during production and inspection.

[0003] Patent CN219957278U discloses a device for testing the air permeability of woven fabrics, relating to the technical field of woven fabric testing equipment. It includes a mounting base plate, a supporting vertical rod fixed at the center of the top wall of the mounting base plate, a mounting top plate fixed at the top wall of the supporting vertical rod, and blowers and air permeability testing frames installed around the top wall of the mounting base plate. A blower pipe extending into the inner cavity of the air permeability testing frame is fixed to the output end of the blower pump. Pressing components matching multiple sets of air permeability testing frames are installed around the top wall of the mounting top plate. Air pressure sensors are installed at the upper ends of the outer walls of the four sets of air permeability testing frames. This application involves placing the woven fabric on top of the air permeability testing frame, activating the pressing components to cover the air permeability testing frame, activating the blower pump to deliver air into the air permeability testing frame through the blower pipe, and the air pressure sensors automatically monitoring air pressure changes. The air permeability performance of the woven fabric can be tested by observing the rate of air pressure change.

[0004] In existing technologies, the air permeability of woven fabrics can be automatically tested by setting up an air permeability testing frame and an air pressure sensor. However, the following problems still exist in the overall use: First, during the testing process, the fabric threads will move due to the pressure of the airflow, causing changes in the yarn layout and forming air holes of varying sizes in local areas, which affects the test results of the fabric. Second, during the testing of existing yarns, impurities adhering to the surface will clog the fabric surface, affecting the air permeability of the fabric. Utility Model Content

[0005] To overcome the shortcomings of the prior art, this utility model provides a device for testing the air permeability of woven fabrics. By setting a tensioning element and a top pressure block, it solves the problem of air holes forming in the textile threads due to air pressure, and can fix the fabric, providing stability. At the same time, by setting an elastic element and a collection box, it solves the problem of impurities adhering to the fabric surface affecting the test.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a woven fabric air permeability testing device, comprising a machine body, a tensioning member with an arc-shaped top slidably disposed inside the machine body, a collection box disposed below the tensioning member inside the machine body, an opening and closing valve disposed between the collection box and the tensioning member, one end of the opening and closing valve being connected to the tensioning member, a mounting frame disposed on the end face of the machine body, a testing box slidably disposed inside the mounting frame, a mounting frame slidably disposed inside the testing box, a plurality of elastic members disposed inside the mounting frame, and a plurality of movable hooks rotatably disposed on the bottom end face of the testing box, the plurality of movable hooks corresponding to the plurality of elastic members.

[0007] Preferably, an air pump is installed below the tensioning member inside the machine body, and the air outlet of the air pump is connected to the interior of the tensioning member through a first connecting pipe.

[0008] Preferably, the tensioning member has multiple air holes on its arc-shaped surface, and a flow valve is provided on the outer surface of the detection box above the tensioning member. The flow valve is connected to the inside of the collection box through a hose.

[0009] Preferably, a connecting cylinder is provided on the bottom end face of the tensioning member, a pressure sensor is provided inside the connecting cylinder on the bottom end face of the tensioning member, and a push plate is slidably provided inside the connecting cylinder, the push plate being able to abut against the connecting cylinder.

[0010] Preferably, a blower is provided on one side of the collection box, the output end of the blower is connected to the inside of the collection box, and a filter bag is provided inside the collection box.

[0011] Preferably, the bottom end face of the testing box is provided with a top pressing block, and a mounting groove is provided below the top pressing block on the end face of the machine body. A bottom pressing block is provided on the end face of the mounting groove. The bottom pressing block and the top pressing block can engage to fix the woven fabric sample.

[0012] Preferably, the top of the inner wall of the testing box is provided with multiple fixing blocks, and each of the multiple fixing blocks is rotatably provided with a rotating shaft. The rotating shaft is fixedly connected to the movable hook, and one end of the rotating shaft is provided with a coil spring. One end of the coil spring is fixedly connected to the fixing block.

[0013] Preferably, the inner wall of the testing box is provided with multiple slide rails, and each of the multiple slide rails is slidably provided with an electric slider, and each of the multiple electric sliders is fixedly connected to the mounting frame.

[0014] In summary, compared with existing technologies, the beneficial effects of this solution are as follows: (1) By setting up the mounting groove, top pressure block, tensioning element and air hole, this utility model can fix the fabric, prevent the fabric from shaking during the test, improve the stability of the fabric sample, and also make the fabric sample on the end face of the tensioning element taut and stretch the sample by moving the tensioning element, preventing the yarn from shifting during the test, preventing the generation of air holes, thereby improving the accuracy of the test. (2) By setting up an installation frame, elastic elements, a blower, and a collection box, this utility model can move the installation frame up and down before testing, so that multiple elastic elements inside the installation frame continuously tap the surface of the fabric, thereby vibrating the impurities adhering to the surface, preventing the impurities from affecting the testing effect, and by setting up a collection box, the impurities can be uniformly recycled. Attached Figure Description

[0015] Figure 1 This is a perspective view of the present invention; Figure 2 This is a front view of the present invention; Figure 3 for Figure 2 A three-dimensional sectional view at point AA; Figure 4 for Figure 3 A magnified view of a section at point B in the middle; Figure 5 This is a structural schematic diagram of the mounting frame parts; Figure 6 for Figure 5 A magnified view of a section at point C; In the diagram: 10. Body, 11. Mounting bracket, 12. Detection box, 13. Threaded rod, 14. Drive motor, 15. Auxiliary rod, 16. Mounting frame, 17. Elastic element, 18. Slide rail, 19. Electric slider, 20. Mounting groove, 21. Top pressure block, 22. Bottom pressure block, 23. Tensioning element, 24. Connecting cylinder, 25. Pressure sensor, 26. Push plate, 27. Drive cylinder, 28. Air pump, 29. Opening and closing valve, 30. Collection box, 31. Filter bag, 32. Blower, 33. Circulation pipe, 34. Flow valve, 35. Fixing block, 36. Rotating shaft, 37. Movable hook, 38. Coil spring, 39. Air hole. Detailed Implementation

[0016] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0017] refer to Figure 1 , Figure 2 , Figure 3 and Figure 4A device for testing the air permeability of woven fabrics includes a machine body 10. A tensioning member 23 with an arc-shaped top is slidably disposed inside the machine body 10. During testing, the fabric is laid flat on the arc-shaped end face of the tensioning member 23. The tensioning member 23, with its arc-shaped end face, allows the fabric to adhere tightly to the arc-shaped end face and undergo uniform deformation when moving upwards, preventing the elastic fabric sample from shrinking after cutting and affecting the test results, thereby improving the accuracy of the test results. A connecting cylinder 24 is disposed on the bottom end face of the tensioning member 23. The interior of the connecting cylinder 24 is a cavity, and a pressure sensor 25 is disposed inside the connecting cylinder 24 on the bottom end face of the tensioning member 23. The pressure sensor 25 can detect the tension. The tensioning member 23 is subjected to a thrust, thereby collecting information on the pressure that the fabric can withstand. A push plate 26 is slidably arranged inside the connecting cylinder 24. When the push plate 26 moves upward, it can push the tensioning member 23 to move upward, providing the power for the tensioning member 23 to move. When the push plate 26 moves, it can abut against the connecting cylinder 24. The thrust of the push plate 26 is detected by the pressure sensor 25, thereby better controlling the moving distance of the tensioning member 23 and facilitating the adjustment of the tensile strength of the fabric. A drive cylinder 27 is arranged inside the machine body 10 below the tensioning member 23. The output end of the drive cylinder 27 is fixedly connected to the push plate 26, and the drive cylinder 27 can provide a power source for the push plate 26. Furthermore, the machine body 10 has multiple vertically arranged guide rods inside, and each guide rod has a sliding sleeve on its outside. The sliding sleeves are fixedly connected to the outer surface of the tensioning member 23. The guide rods can restrict the movement direction of the tensioning member 23 and prevent the tensioning member 23 from deviating from its position, thereby improving the stability of the device. A detection port is provided on the end face of the machine body 10. The tensioning member 23 can pass through the detection port, thereby pushing the fabric at the top to deform. An information terminal is provided on one side of the machine body 10. The information terminal can collect detection information and control the orderly operation of each part.

[0018] Further reference Figure 2 , Figure 3 and Figure 4Below the tensioning member 23, inside the machine body 10, is a collection box 30. The collection box 30 filters impurities in the air and collects the filtered impurities inside for unified recycling, improving work convenience. Below the tensioning member 23, inside the machine body 10, is an air pump 28. The air pump 28 provides the air source for air permeability testing inside the tensioning member 23. The air outlet of the air pump 28 is connected to the inside of the tensioning member 23 through a first connecting pipe. Multiple air holes 39 are provided on the arc-shaped surface of the tensioning member 23. The gas output by the air pump 28 seeps out from the surface of the fabric through the multiple air holes 39. Above the tensioning member 23, on the outer surface of the testing box 12, is a flow valve 34. The seeping gas flows into the collection box 30 through a hose outside the flow valve 34. Inside the collection box 30 is a circulation pipe 33, which is connected to the hose. The amount of gas flowing in is detected by the flow valve 34 and sent to the information terminal for processing, thereby analyzing the air permeability efficiency of the fabric.

[0019] Further reference Figure 2 , Figure 3 and Figure 4 A blower 32 is installed on one side of the collection box 30. The output end of the blower 32 is connected to the interior of the collection box 30. An on / off valve 29 is installed between the collection box 30 and the tensioning member 23. One end of the on / off valve 29 is connected to the collection box 30 through a telescopic tube, and the other end of the on / off valve 29 is connected to the tensioning member 23. The on / off valve 29 can open and close the connection between the collection box 30 and the tensioning member 23. When testing the air permeability of the fabric, closing the on / off valve 29 can seal the telescopic tube, thus allowing the tensioning member to open and close. The tensioning element 23 forms a closed space to prevent air leakage and affect the accuracy of the air permeability test. The inside of the collection box 30 is equipped with a filter bag 31. Before the test, the opening and closing valve 29 needs to be activated to connect the tensioning element 23 with the inside of the collection box 30. Then, the blower 32 is started to draw air from the inside of the tensioning element 23. The air is collected inside the collection box 30. Impurities in the air are blocked by the filter bag 31, thus filtering. The filtered air is discharged through the blower 32.

[0020] Further reference Figure 1 , Figure 2 and Figure 3A mounting bracket 11 is provided on the end face of the machine body 10. A threaded rod 13 is rotatably provided inside the mounting bracket 11. A drive motor 14 is provided at one end of the threaded rod 13 on the end face of the mounting bracket 11. The output shaft of the drive motor 14 is connected to the mounting bracket 11. A threaded sleeve is provided on the outer circular surface of the threaded rod 13. A detection box 12 is provided on one side of the threaded sleeve. An auxiliary rod 15 is provided on one side of the detection box 12 at the temporal part of the mounting bracket 11. The detection box 12 and the auxiliary rod 15 are slidably connected, so that the fabric to be tested can be placed on the end face of the tensioner 23. During testing, the detection box 12 can be slid down to lock onto the end face of the machine body 10, forming a closed space to prevent air leakage and affect the accuracy of the test.

[0021] Further reference Figure 2 , Figure 3 and Figure 4 The bottom end face of the test box 12 is provided with a top pressure block 21, and the bottom end face of the top pressure block 21 is provided with multiple sharp teeth, which can improve the fixing effect of the fabric. Below the top pressure block 21, on the end face of the machine body 10, there is a mounting groove 20, and on the end face of the mounting groove 20, there is a bottom pressure block 22. The bottom pressure block 22 and the top pressure block 21 can engage and fix the woven fabric sample. Before testing, the fabric is laid flat on the end face of the tensioner 23, and then the drive motor 14 is started, which drives the external threaded sleeve to move, thereby causing the threaded sleeve to move the test box 12 downward. When the test box 12 moves, it drives the bottom top pressure block 21, and the top pressure block 21 fixes the edge of the fabric to the end face of the bottom pressure block 22, thereby improving the stability of the fabric.

[0022] Further reference Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 6The inner wall of the testing box 12 is provided with multiple slide rails 18, and electric sliders 19 are slidably mounted on the outside of each slide rail 18. A mounting frame 16 is provided between the multiple electric sliders 19, and multiple elastic elements 17, made of rubber, are provided inside the mounting frame 16. Multiple fixing blocks 35 are provided at the top of the inner wall of the testing box 12, and a rotating shaft 36 is rotatably mounted inside each fixing block 35. A movable hook 37 is fixedly mounted on the outer circumference of the rotating shaft 36. The movable hook 37 is generally hook-shaped with a slope at the bottom. A coil spring 38 is provided at one end of the rotating shaft 36, and one end of the coil spring 38 is fixedly connected to the fixing block 35. Before testing, after the fabric is fixed, the electric sliders 19 are activated, causing the mounting frame 16 to move downwards. The mounting frame 16 then moves the multiple elastic elements 17 downwards. Because the elastic elements 17 are moved by the movable hooks 37... When the hook 7 is engaged, the elastic element 17 is stretched. As the elastic element 17 continues to move, it continuously applies tension to the movable hook 37, causing the movable hook 37 to rotate via the pivot 36 and compress the external coil spring 38. When the rotation angle of the movable hook 37 increases, the elastic element 17 hooked at the top will disengage from the movable hook 37 and, due to the elastic potential energy of the elastic element 17, will bounce downwards, striking the surface of the fabric, causing the fabric to shake and dislodging impurities from the fabric surface. Subsequently, the electric slider 19 drives the mounting frame 16 to rise, and also drives the elastic element 17 to rise. During the rising process, the elastic element 17 will first abut against the inclined surface at the bottom of the movable hook 37, rise along the inclined surface, and compress the elastic element 17 to move to one side. When the elastic element 17 exceeds the height of the inclined surface, it recovers due to the elastic potential energy and enters the bend of the movable hook 37 for the next use.

[0023] The specification and claims use certain terms to refer to specific components. Those skilled in the art will understand that hardware manufacturers may use different names to refer to the same component. This specification and claims do not distinguish components based on differences in name, but rather on differences in function. The term "comprising" throughout the specification and claims is an open-ended term and should be interpreted as "comprising but not limited to." "Approximately" means that within an acceptable margin of error, those skilled in the art can solve the technical problem and substantially achieve the technical effect within a certain margin of error.

[0024] In this solution, the detection and control of multiple drive cylinders, electric sliders, drive motors, and their specific distances can all be achieved by setting controllers and sensors or control circuits on the outside of these drive components in actual production. These can all be applied using existing technologies and are not technical issues that this solution needs to solve, so this solution will not elaborate on them further.

[0025] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a product or system comprising a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a product or system. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the product or system that includes said element.

[0026] The foregoing description presents and describes several preferred embodiments of this application. However, as mentioned above, it should be understood that this application is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the application concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of this application should be within the protection scope of the appended claims.

Claims

1. A device for testing the air permeability of woven fabrics, comprising a machine body (10), characterized in that, The body (10) is slidably provided with a tensioning member (23) with an arc-shaped top. Below the tensioning member (23) is a collection box (30) inside the body (10). An opening and closing valve (29) is provided between the collection box (30) and the tensioning member (23). One end of the opening and closing valve (29) is connected to the tensioning member (23). An installation frame (11) is provided on the end face of the body (10). A detection box (12) is slidably provided inside the installation frame (11). An installation frame (16) is slidably provided inside the detection box (12). Multiple elastic elements (17) are provided inside the installation frame (16). Multiple movable hooks (37) are rotatably provided on the bottom end face of the detection box (12). The multiple movable hooks (37) are correspondingly provided with the multiple elastic elements (17).

2. The air permeability testing device for woven fabrics according to claim 1, characterized in that, Below the tensioner (23), inside the body (10), there is an air pump (28), and the air outlet of the air pump (28) is connected to the inside of the tensioner (23) through a first connecting pipe.

3. The air permeability testing device for woven fabrics according to claim 2, characterized in that, The tensioning member (23) has multiple air holes (39) on its arc-shaped surface. A flow valve (34) is provided on the outer surface of the detection box (12) above the tensioning member (23). The flow valve (34) is connected to the inside of the collection box (30) through a hose.

4. The air permeability testing device for woven fabrics according to claim 3, characterized in that, The bottom end face of the tensioning member (23) is provided with a connecting cylinder (24), and a pressure sensor (25) is provided inside the connecting cylinder (24) on the bottom end face of the tensioning member (23). A push plate (26) is slidably provided inside the connecting cylinder (24), and the push plate (26) can abut against the connecting cylinder (24).

5. The air permeability testing device for woven fabrics according to claim 1, characterized in that, A blower (32) is provided on one side of the collection box (30), and the output end of the blower (32) is connected to the inside of the collection box (30). A filter bag (31) is provided inside the collection box (30).

6. The air permeability testing device for woven fabrics according to claim 1, characterized in that, The bottom end face of the test box (12) is provided with a top pressure block (21), and a mounting groove (20) is provided below the top pressure block (21) on the end face of the machine body (10). A bottom pressure block (22) is provided on the end face of the mounting groove (20). The bottom pressure block (22) and the top pressure block (21) can engage and fix the woven fabric sample.

7. The air permeability testing device for woven fabrics according to claim 6, characterized in that, The top of the inner wall of the detection box (12) is provided with multiple fixing blocks (35), and each of the multiple fixing blocks (35) is rotatably provided with a rotating shaft (36). The rotating shaft (36) is fixedly connected to the movable hook (37). One end of the rotating shaft (36) is provided with a coil spring (38), and one end of the coil spring (38) is fixedly connected to the fixing block (35).

8. The air permeability testing device for woven fabrics according to claim 7, characterized in that, The inner wall of the testing box (12) is provided with multiple slide rails (18), and electric sliders (19) are slidably provided on the outside of the multiple slide rails (18). The multiple electric sliders (19) are fixedly connected to the mounting frame (16).

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