Textile air permeability detection device

Abstract

The invention discloses a textile air permeability detection device, and relates to the technical field of textile detection. The device comprises a support, an upper air duct and a lower air duct which are coaxial are arranged on the support, an air speed sensor and a fan are arranged in the upper air duct and the lower air duct respectively, and the device further comprises a clamping disturbance mechanism which comprises a plurality of first sliding rods which are arranged on the lower air duct in a sliding mode and distributed in an annular mode, second sliding rods with the same number as the first sliding rods are arranged on the upper air duct in a sliding mode. Fabric is clamped and fixed between the upper air duct and the lower air duct through the first sliding rod and the second sliding rod, the first sliding rod is driven by the driving mechanism to slide in a staggered and reciprocating mode, the second sliding rod is adjusted in a self-adaptive mode under elastic contact of the contact spring, and therefore the fabric fluctuates in the axial direction and is stretched in the radial direction, and dynamic air permeability detection is conducted on the fabric; meanwhile, axial fluctuation and radial stretching can also detect fatigue recovery of the fabric, so that the air permeability detection is more comprehensive.

Description

Technical Field

[0001] The present invention relates to the technical field of textile testing, and in particular to a device for testing the air permeability of textiles. Background Art

[0002] Textiles are products made from processed textile fibers and are divided into two categories: woven fabrics and woven fabrics. In order to increase the sales of textiles, it is necessary to continuously improve the quality of textiles. In order to judge the quality of textiles, it is necessary to test the air permeability of textiles. The existing test is to directly attach the textile fabric to the air duct for air permeability testing. The textile fabric is in a static state and is exposed to wind, which cannot test the air permeability of elastic textiles.

[0003] For example, the Chinese invention patent (publication number: CN117929239A) discloses a device and method for testing the air permeability of textiles. The specification discloses that in real life, there is a type of elastic fabric, such as yoga wear and sportswear. These clothes fit the curves of the human body, and the textiles that make up the clothes are inherently elastic. Existing air permeability testing devices are unable to test the air permeability durability of elastic textiles.

[0004] The above patents can prove the defects of the existing technology. Therefore, the present invention proposes a textile air permeability testing device. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems in the above-mentioned background technology and provide a device for detecting the air permeability of textiles.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions: A textile air permeability testing device includes a bracket, wherein the bracket is provided with a coaxial upper air duct and a lower air duct, wherein the upper air duct and the lower air duct are respectively provided with a wind speed sensor and a fan, and further includes: The clamping disturbance mechanism includes several first sliding bars slidably arranged on the lower wind tube and distributed in a ring shape, a second sliding bar equal to the first sliding bar is slidably arranged on the upper wind tube, a limit plate is fixed on the second sliding bar, and a resistance spring sleeved on the second sliding bar is installed between the limit plate and the upper wind tube, and a driving mechanism is provided on the bracket, which is used to drive the several first sliding bars to slide back and forth in an offset manner, and a wind shield is provided between the upper wind tube and the lower wind tube, and the wind shield is used to prevent the airflow from leaking from the gap between the upper wind tube and the lower wind tube.

[0007] Furthermore, the driving mechanism includes a rotating ring rotatably mounted on the lower wind tube, the top of the rotating ring is constructed with an undulating annular surface, a ball is movably inserted into the bottom end of the first sliding rod and the ball rolls and overlaps with the undulating annular surface, a gear ring is fixed on the rotating ring, a motor is provided on the bracket, a rotating rod is fixed on the output shaft of the motor, and a gear meshing with the teeth of the gear ring is fixed on the rotating rod.

[0008] Furthermore, the windshield member includes a first rubber ring fixed on the end of several first sliding rods, the first rubber ring is connected to the lower wind tube with a first rubber sleeve, and the ends of several second sliding rods are fixed with a second rubber ring, and the second rubber ring is connected to the upper wind tube with a second rubber sleeve.

[0009] Furthermore, a partition is provided in the lower wind tube, an air duct is movably passed through the partition, the fan is provided in the air duct, and a driving member for driving the air duct to shake is provided on the bracket.

[0010] Furthermore, the driving member includes a crankshaft rotatably arranged on the bracket, the crankshaft is connected to the rotating rod through a linkage, and a guide rod is slid through the lower wind tube. One end of the guide rod is provided with a ring that is movably mounted on the air duct, and the other end of the guide rod is hinged with a connecting rod, and the free end of the connecting rod is rotatably mounted on the crankshaft.

[0011] Furthermore, the linkage part includes a first spline rod and a second spline rod respectively fixed on the end of the rotating rod and the crankshaft, a spline cylinder is slidingly sleeved on the first spline rod and the second spline rod, a first magnetic ring is fixed on the rotating rod and the crankshaft, and a second magnetic ring is fixed at both ends of the spline cylinder.

[0012] Furthermore, a plurality of tension springs distributed in a ring shape are connected between the air duct and the partition.

[0013] Furthermore, the inner wall of the circular ring is provided with two arc-shaped plates, and the two arc-shaped plates are distributed along the axis direction of the guide rod.

[0014] Furthermore, a dustproof net shell is provided on the threaded sleeve at the bottom end of the downwind tube.

[0015] Furthermore, sliding grooves are provided on opposite sides of the inner wall of the bracket, a connecting frame is fixed on the upper wind tube and the connecting frame is slidably inserted into the two sliding grooves, a screw rod is threaded through the bracket and the end of the screw rod is rotatably connected to the connecting frame.

[0016] The beneficial effects of the present invention are as follows: In the present invention, the fabric is clamped and fixed between the upper air duct and the lower air duct by a first sliding rod and a second sliding rod. The first sliding rod is driven by a driving mechanism to slide back and forth in an offset manner, and the second sliding rod is adaptively adjusted under the elastic force of the resistance spring, so that the fabric fluctuates axially and stretches radially, so that the fabric can be dynamically tested for air permeability. At the same time, the axial fluctuation and radial stretching can also detect the fatigue recovery of the fabric, thereby making the air permeability test more comprehensive.

[0017] In the present invention, an undulating annular surface is constructed on the top of the rotating ring, and the bottom end of the first sliding rod is rolled and overlapped with the undulating annular surface through a ball. Affected by the undulation of the undulating annular surface, the heights of several first sliding rods are inconsistent, forming a circumferential wave. When the rotating ring rotates, the several first sliding rods undulate in a wave-like manner, causing the fabric to undulate in a wave-like manner, which can ensure axial fluctuation and radial stretching of the fabric without causing damage to the fabric.

[0018] In the present invention, a partition is set in the lower wind tube, and the air duct is set on the partition through the rotation of the spherical shell. The fan is set in the air duct. When the motor drives the fabric to fluctuate, it can also drive the air duct to shake to a certain extent to supply air at multiple angles. It can also be disconnected to supply air vertically. Through these two air supply methods, the air permeability of the fabric can be comprehensively tested. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural diagram of the present invention; Figure 2 It is a sectional view of the three-dimensional structure of the present invention; Figure 3 It is another three-dimensional structural cross-sectional view of the present invention; Figure 4 This is a three-dimensional structural diagram of the upper wind tube of the present invention; Figure 5 This is a three-dimensional structural diagram of the lower air duct of the present invention; Figure 6 This is a three-dimensional structural diagram of the rotating ring of the present invention; Figure 7 This is a three-dimensional structural diagram of the windshield member of the present invention; Figure 8 It is a partial three-dimensional structural diagram of the present invention; Figure 9 It is a partial three-dimensional structural cross-sectional view of the present invention; Figure 10 It is an exploded view of a partial three-dimensional structure of the present invention.

[0020] Reference numerals: 1, bracket; 2, upper air duct; 3, lower air duct; 4, wind speed sensor; 5, fan; 6, clamping disturbance mechanism; 7, partition; 8, air duct; 9, driving member; 10, tension spring; 11, curved plate; 12, dustproof mesh shell; 13, slide groove; 14, connecting frame; 15, screw rod; 601, first sliding rod; 602, second sliding rod; 603, limit plate; 604, interference spring; 605, driving mechanism; 606, wind shield; 6051, rotating ring; 6052, undulating annular surface; 6053, ball bearing; 6054, gear ring; 6055, motor; 6056, rotating rod; 6057, gear; 6061, first rubber ring; 6062, first rubber sleeve; 6063, second rubber ring; 6064, second rubber sleeve; 901, crankshaft; 902, linkage; 903, ring; 904, connecting rod; 905, guide rod; 9021, first spline rod; 9022, second spline rod; 9023, spline cylinder; 9024, first magnetic ring; 9025, second magnetic ring. DETAILED DESCRIPTION

[0021] To make the objectives, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] like Figures 1-10 As shown, a textile air permeability testing device proposed in one embodiment of the present invention includes a bracket 1, on which a coaxial upper air cylinder 2 and a lower air cylinder 3 are provided, and a wind speed sensor 4 and a fan 5 are respectively provided in the upper air cylinder 2 and the lower air cylinder 3. Preferably, there is a gap between the upper air cylinder 2 and the lower air cylinder 3. When performing the air permeability test, the textile fabric is placed in the gap between the upper air cylinder 2 and the lower air cylinder 3, and the fan 5 works to generate airflow and make the airflow flow upward along the lower air cylinder 3 and the upper air cylinder 2. The airflow passes through the textile fabric, and the wind speed sensor 4 monitors the flow rate of the passing airflow, thereby playing a role in testing the air permeability of the fabric, which is a distinguishing feature of the prior art of the present invention; The distinguishing technical features of the present invention also include: a clamping disturbance mechanism 6, comprising a plurality of first slide bars 601 slidably arranged on the lower air cylinder 3 and distributed in a ring shape, preferably, a ring end plate is constructed at the top end of the lower air cylinder 3, and a plurality of first slide bars 601 all slide through the ring end plate, a second slide bar 602 equal to the first slide bar 601 is slidably arranged on the upper air cylinder 2, a ring end plate is constructed at the bottom end of the upper air cylinder 2, a plurality of second slide bars 602 all slide through the ring end plate, a plurality of second slide bars 602 respectively correspond to a plurality of first slide bars 601, a limiting plate 603 is fixed on the second slide bar 602, and a resisting spring 604 mounted on the second slide bar 602 is installed between the limiting plate 603 and the upper air cylinder 2. When clamping and fixing the fabric, the fabric is first slid upward. The plurality of second slide bars 602 are moved, and the limiting plates 603 are squeezed by the resistance springs 604, so that the fabric is laid flat on top of the plurality of first slide bars 601, and then the second slide bars 602 are loosened. Under the elastic resistance of the resistance springs 604, the second slide bars 602 cooperate with the first slide bars 601 to clamp and fix the fabric, so that there are a plurality of clamping points on the periphery of the fabric to ensure that the fabric is firmly fixed. A driving mechanism 605 is provided on the bracket 1, which is used to drive the plurality of first slide bars 601 to slide back and forth in a dislocated manner. The plurality of first slide bars 601 are driven to slide back and forth in a dislocated manner by the driving mechanism 605. It should be noted that the plurality of first slide bars 601 are distributed in a circular array. At this time, the dislocation refers to that some of the first slide bars 601 slide upward and some of the first slide bars slide downward. 601 slides downward, so that the first slide bars 601 are divided into two groups when they slide back and forth up and down. The two groups of first slide bars 601 are staggered and slide in opposite directions (similar to the ups and downs of waves). When the first slide bars 601 slide back and forth, the second slide bars 602 adaptively adjust their positions under the elastic force of the resistance spring 604 to ensure that the first slide bars 601 and the corresponding second slide bars 602 effectively clamp the fabric. Due to the dislocation and reciprocating sliding of the first slide bars 601, the fabric will fluctuate axially up and down. At the same time, due to the dislocation and reciprocating sliding of the first slide bars 601, the fabric will be clamped and restrained by the first slide bars 601 and the second slide bars 602 during the up and down fluctuation process, thereby radially stretching the fabric and stretching it. The fabric is subjected to contraction and reset due to fluctuating stress, so that when the breathability performance test is carried out, it is no longer subjected to conventional static wind testing, but presents axial up and down fluctuations and radial stretching and contraction, thereby simulating the fluctuations or stretching caused by the movement of the human body after wearing it, so as to detect the breathability maintenance status of the fabric under elastic conditions. The axial fluctuation is combined with the radial stretching to detect the fatigue recovery of the fabric, thereby making the breathability test more comprehensive. A windshield 606 is provided between the upper wind tube 2 and the lower wind tube 3. The windshield 606 is used to prevent the air flow from leaking from the gap between the upper wind tube 2 and the lower wind tube 3. Since there is a gap between the upper wind tube 2 and the lower wind tube 3, and the fabric is clamped and fixed by the first slide bar 601 and the second slide bar 602, the first slide bar 601 and the second slide bar 602 will slide again.By providing the wind shield 606, it is possible to prevent the airflow from leaking directly from the gap between the upper air duct 2 and the lower air duct 3, thereby improving the accuracy of the detection result; In this solution, the fabric is clamped and fixed between the upper air duct 2 and the lower air duct 3 by the first sliding bar 601 and the second sliding bar 602. The first sliding bar 601 is driven to slide back and forth by the driving mechanism 605, and the second sliding bar 602 is adaptively adjusted under the elastic resistance of the resistance spring 604, so that the fabric fluctuates axially and stretches radially, so that the fabric can be dynamically tested for its breathability. At the same time, the axial fluctuation and radial stretching can also detect the fatigue recovery of the fabric, making the breathability test more comprehensive.

[0023] like Figure 5 As shown, the specific structure of the driving mechanism 605 of the present invention is disclosed. The driving mechanism 605 includes a rotating ring 6051 rotatably mounted on the lower wind tube 3. The top of the rotating ring 6051 is constructed with an undulating annular surface 6052. Preferably, as shown in FIG. Figure 6 As shown, the undulating annular surface 6052 has several convex and concave surfaces that are staggered and connected end to end. The number of convex and concave surfaces can be odd or even. In actual use, the odd number is the best. A ball 6053 is movably inserted at the bottom end of the first slide bar 601 and the ball 6053 rolls and overlaps with the undulating annular surface 6052. A gear ring 6054 is fixed on the rotating ring 6051. A motor 6055 is provided on the bracket 1. A rotating rod 6056 is fixed on the output shaft of the motor 6055. A gear 6057 is fixed on the rotating rod 6056 and engages with the teeth of the gear ring 6054. In the initial state, the bottom ends of several first slide bars 601 overlap on the undulating annular surface 6052. Affected by the ups and downs of the undulating annular surface 6052, the heights of several first slide bars 601 are inconsistent, forming a circumferential wave. After the fabric is placed on the several first slide bars 601, it is affected by the first The clamping and interference of the two sliding bars 602 also form a circular wave shape at several fixed points on the periphery of the fabric. When the air permeability performance is tested, the motor 6055 performs work, and its output shaft drives the rotating rod 6056 to rotate. Under the meshing of the teeth of the gear 6057 and the gear ring 6054, the rotating ring 6051 is driven to rotate horizontally. When the rotating ring 6051 rotates, affected by the undulating annular surface 6052, several first sliding bars 601 are offset and slide back and forth (in a circular wave shape), thereby achieving the effect of driving the fabric to fluctuate axially and stretch radially. By rolling and inserting a ball 6053 at the bottom end of the first sliding bar 601, the rolling interference between the ball 6053 and the undulating annular surface 6052 is utilized to reduce the friction resistance between the first sliding bar 601 and the undulating annular surface 6052, so that when the rotating ring 6051 rotates, the first sliding bar 601 can slide up and down more smoothly.

[0024] like Figure 7As shown, the specific structure of the windshield 606 of the present invention is disclosed. The windshield 606 includes a first rubber ring 6061 fixed to the end of a plurality of first slide bars 601. The first rubber ring 6061 is connected to the lower wind tube 3 with a first rubber sleeve 6062. The ends of the plurality of second slide bars 602 are fixed with a second rubber ring 6063. The second rubber ring 6063 is connected to the upper wind tube 2 with a second rubber sleeve 6064. Preferably, the first rubber ring 6061 and the second rubber ring 6063 are both made of butadiene rubber, which has good elasticity, and both are constructed to have a certain thickness. The ring body can maintain a horizontal ring body without being disturbed by external forces. The first rubber sleeve 6062 and the second rubber sleeve 6064 are both made of butadiene rubber with good elasticity. Both are constructed in a thin cylindrical shape. Since the first sliding rods 601 are affected by the undulating ring surface 6052, when the fabric is placed between the upper wind tube 2 and the lower wind tube 3, under the elastic force of the resistance spring 604, the first rubber ring 6061 and the second rubber ring 6063 are squeezed and resisted on both sides of the fabric, and are resisted by the resistance spring 604 to form a bent and twisted state. At this time, the state is as follows Figure 7 As shown, when the first sliding rod 601 slides back and forth, the first rubber ring 6061 and the second rubber ring 6063 will be deformed, and the first rubber sleeve 6062 and the second rubber sleeve 6064 will also be deformed. While ensuring that the fabric is effectively clamped and fixed without interfering with the normal axial fluctuation or radial stretching of the fabric, it can also play a role in blocking the wind and preventing air leakage, thereby ensuring the performance test results and improving practicality.

[0025] like Figure 2 、 Figure 3 、 Figure 8 and Figure 9 As shown, the present invention discloses a further technical solution for airflow blowing, a partition 7 is provided in the lower air duct 3, an air duct 8 is movably penetrated on the partition 7, a fan 5 is provided in the air duct 8, and a driving member 9 for driving the air duct 8 to shake is provided on the bracket 1. Preferably, as Figure 9 As shown, the air duct 8 is constructed with a spherical shell portion, which is rotatably connected to the partition 7, so that the air duct 8 can not only stand upright and pass through the partition 7, but also shake or swing to a certain extent with the spherical shell portion as the center of the circle. The air duct 8 is driven to shake by the driving member 9, so that the air duct 8 can stand upright, so that the airflow generated by the fan 5 can blow the fabric vertically. At the same time, the air duct 8 shakes, introducing multi-angle airflow to blow the fabric, simulating the wind blowing under dynamic conditions such as human movement. The two methods are used for testing, so that the breathability of the fabric can be comprehensively tested.

[0026] like Figure 8 and Figure 9As shown, the specific structure of the driving member 9 of the present invention is disclosed. The driving member 9 includes a crankshaft 901 rotatably set on the bracket 1, and the crankshaft 901 is connected to the rotating rod 6056 through a linkage member 902. A guide rod 905 is slidably passed through the lower wind tube 3. One end of the guide rod 905 is provided with a ring 903 movably sleeved on the air duct 8. Preferably, the inner diameter of the ring 903 is larger than the outer diameter of the air duct 8, and there is a gap between the inner wall of the ring 903 and the outer wall of the air duct 8. The other end of the guide rod 905 is hinged with a connecting rod 904. The free end of the connecting rod 904 is rotatably sleeved on the crankshaft 901. Preferably, a collar is rotatably sleeved on the crankshaft 901, and the connecting rod 904 One end away from the guide rod 905 is fixedly connected to the collar. When the motor 6055 drives the rotating rod 6056 to rotate, the crankshaft 901 is driven to rotate under the linkage of the linkage part 902. When the crankshaft 901 rotates, the connecting rod 904 moves back and forth with the crankshaft 901, and its other end pulls or resists the guide rod 905, thereby driving the guide rod 905 to slide horizontally back and forth. When the guide rod 905 slides horizontally back and forth and drives the ring 903 to move horizontally back and forth, the ring 903 will apply a pulling force or a pushing force to the air duct 8, thereby driving the air duct 8 to shake or swing, so as to realize multi-angle air supply, thereby comprehensively testing the breathability of the fabric.

[0027] like Figure 10 As shown, the specific structure of the linkage member 902 of the present invention is disclosed. The linkage member 902 includes a first spline rod 9021 and a second spline rod 9022 fixed to the end of the rotating rod 6056 and the crankshaft 901 respectively. A spline cylinder 9023 is slidably sleeved on the first spline rod 9021 and the second spline rod 9022. A first magnetic ring 9024 is fixed on the rotating rod 6056 and the crankshaft 901. A second magnetic ring 9025 is fixed at both ends of the spline cylinder 9023. Preferably, the two first magnetic rings 9024 are magnetically connected to the two second magnetic rings 9025, as shown in FIG. Figure 10As shown, the length of the first spline rod 9021 is longer than the length of the second spline rod 9022, and the length of the spline cylinder 9023 is adapted to the length of the first spline rod 9021. The spline cylinder 9023 is slid upward, and the spline cylinder 9023 is only spline-matched with the first spline rod 9021. At this time, the second magnetic ring 9025 at the upper end of the spline cylinder 9023 is magnetically connected to the first magnetic ring 9024 on the rotating rod 6056, thereby fixing the position of the spline cylinder 9023. At this time, the driving force of the motor 6055 will not act on the air duct 8, so that the air duct 8 is in an upright state, thereby performing vertical air induction. When multi-angle air induction is required , slide the spline cylinder 9023 downward, thereby disconnecting the first magnetic ring 9024 and the second magnetic ring 9025 above. When the spline cylinder 9023 slides to the bottom, the spline cylinder 9023 and the first spline rod 9021 and the second spline rod 9022 are spline-matched, and the second magnetic ring 9025 located below the spline cylinder 9023 is magnetically connected to the first magnetic ring 9024 on the crankshaft 901, thereby fixing the spline cylinder 9023, thereby realizing the transmission connection between the rotating rod 6056 and the crankshaft 901, so that when the motor 6055 is working, its driving force can drive the air duct 8 to shake or swing, so as to realize multi-angle wind detection.

[0028] like Figure 8 and Figure 9 As shown, a further technical solution for airflow blowing of the present invention is disclosed. Several tension springs 10 distributed in a ring shape are connected between the air duct 8 and the partition 7. When vertical air supply detection is performed, the linkage 902 is disconnected (that is, the transmission connection between the crankshaft 901 and the rotating rod 6056 is disconnected). When the fan 5 works to supply air, the fan 5 will generate vibration force when it is running. By connecting several tension springs 10 between the air duct 8 and the partition 7, the air duct 8 can be effectively maintained in an upright state under the pulling of several tension springs 10 in different directions, ensuring the stability of vertical air supply. When multi-angle air supply is required, under the driving force of the motor 6055, the tension spring 10 can be elastically pulled without affecting the normal shaking or swinging of the air duct 8, thereby improving practicality.

[0029] like Figure 8 As shown, the present invention discloses a further technical solution for the shaking of the air duct 8. The inner wall of the ring 903 is provided with two arc-shaped plates 11, and the two arc-shaped plates 11 are distributed along the axis direction of the guide rod 905, as shown in FIG. Figure 8As shown, the two curved plates 11 are distributed along the axial direction of the guide rod 905. When the guide rod 905 slides horizontally left and right, the air duct 8 will preferably contact the curved convex surfaces of the two curved plates 11 due to the movement of the circular ring 903. Affected by the curved convex surfaces of the curved plates 11, the air duct 8 will slide along both sides of the curved plates 11, so that the air duct 8 is no longer limited to shaking or swinging in the left and right directions. By utilizing the resistance of the curved plates 11 and the tension of the tension spring 10, when the circular ring 903 drives the air duct 8 to shake, the air duct 8 can shake or swing in multiple directions, thereby improving the effect of multi-angle air supply, thereby improving the effect of testing the air permeability of the fabric.

[0030] like Figure 2 and Figure 3 As shown, a further technical solution of the present invention for the downwind duct 3 is disclosed. A dustproof mesh shell 12 is provided on the threaded sleeve at the bottom end of the downwind duct 3. Since the fan 5 directly draws air from the outside into the downwind duct 3, when the outside air contains dust impurities, the dust impurities will also follow the airflow into the downwind duct 3. Under the influence of the airflow, the dust impurities in the air will adhere to the bottom side of the fabric, which will interfere with the air permeability of the fabric, thereby affecting the air permeability detection. By arranging a dustproof mesh shell 12 at the bottom end of the downwind duct 3, it can filter the introduced airflow and intercept dust impurities to prevent dust impurities from adhering to the bottom side of the fabric, so as to ensure the accuracy of the air permeability detection. The dustproof mesh shell 12 is threadedly connected to the downwind duct 3, so that the dustproof mesh shell 12 can be detachably connected. After using it for a period of time, it can be disassembled and cleaned to ensure subsequent air permeability detection of other fabrics.

[0031] like Figure 1 As shown, a further technical solution for the upper air duct 2 of the present invention is disclosed. Slide grooves 13 are provided on the opposite sides of the inner wall of the bracket 1. A connecting frame 14 is fixed on the upper air duct 2 and the connecting frame 14 is slidably inserted in the two slide grooves 13. A screw rod 15 is threaded through the bracket 1 and the end of the screw rod 15 is rotatably connected to the connecting frame 14. Through the sliding cooperation between the connecting frame 14 and the slide groove 13, the screw rod 15 is twisted to rotate and move, thereby driving the connecting frame 14 to rise and fall, thereby driving the upper air duct 2 to rise and fall. When fixing the fabric, the upper air duct 2 can be adjusted to a certain height first, and then the fabric can be placed. After the fabric is placed, the upper air duct 2 can be adjusted to fall, making the installation or removal of the fabric during inspection simpler and more convenient. At the same time, by adjusting the lifting and lowering of the upper air duct 2, the pressure and fixing force on the fabric can also be adjusted to ensure the stability of the fabric fixation and ensure better subsequent inspection effect of the fabric.

[0032] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A textile air permeability testing device, comprising a bracket (1), wherein a coaxial upper air duct (2) and a lower air duct (3) are provided on the bracket (1), wherein a wind speed sensor (4) and a fan (5) are provided in the upper air duct (2) and the lower air duct (3), respectively, and wherein: Also includes: The clamping disturbance mechanism (6) comprises a plurality of first slide bars (601) which are slidably arranged on the lower wind tube (3) and distributed in a ring shape, a second slide bar (602) which is equal to the first slide bar (601) and is slidably arranged on the upper wind tube (2), a limit plate (603) is fixed on the second slide bar (602), a resistance spring (604) which is sleeved on the second slide bar (602) is installed between the limit plate (603) and the upper wind tube (2), a driving mechanism (605) is provided on the bracket (1), which is used to drive the plurality of first slide bars (601) to slide back and forth in an offset manner, and a wind shield (606) is provided between the upper wind tube (2) and the lower wind tube (3), and the wind shield (606) is used to prevent airflow from leaking out from the gap between the upper wind tube (2) and the lower wind tube (3).

2. The textile air permeability testing device according to claim 1, characterized in that: The driving mechanism (605) comprises a rotating ring (6051) rotatably sleeved on the lower wind tube (3), the top of the rotating ring (6051) is structured with an undulating annular surface (6052), a ball (6053) is movably inserted into the bottom end of the first sliding rod (601), and the ball (6053) and the undulating annular surface (6052) are rollingly overlapped, a gear ring (6054) is fixedly provided on the rotating ring (6051), a motor (6055) is provided on the bracket (1), a rotating rod (6056) is fixedly provided on the output shaft of the motor (6055), and a gear (6057) meshing with the teeth of the gear ring (6054) is fixedly provided on the rotating rod (6056).

3. The textile air permeability testing device according to claim 1, characterized in that: The windshield member (606) comprises a first rubber ring (6061) fixedly mounted on the ends of a plurality of first sliding rods (601), wherein the first rubber ring (6061) is connected to the lower wind tube (3) via a first rubber sleeve (6062), and a second rubber ring (6063) is fixedly mounted on the ends of a plurality of second sliding rods (602), wherein the second rubber ring (6063) is connected to the upper wind tube (2) via a second rubber sleeve (6064).

4. The textile air permeability testing device according to claim 2, characterized in that: A partition (7) is provided in the lower wind tube (3), an air duct (8) is movably passed through the partition (7), the fan (5) is provided in the air duct (8), and a driving member (9) for driving the air duct (8) to shake is provided on the bracket (1).

5. The textile air permeability testing device according to claim 4, characterized in that: The driving member (9) includes a crankshaft (901) rotatably mounted on the bracket (1), the crankshaft (901) being transmission-connected to the rotating rod (6056) via a linkage member (902), and a guide rod (905) slidingly passing through the lower air duct (3), one end of the guide rod (905) being provided with a ring (903) movably mounted on the air duct (8), and the other end of the guide rod (905) being hingedly connected to a connecting rod (904), the free end of the connecting rod (904) being rotatably mounted on the crankshaft (901).

6. The textile air permeability testing device according to claim 5, characterized in that: The linkage member (902) comprises a first spline rod (9021) and a second spline rod (9022) respectively fixed to the ends of the rotating rod (6056) and the crankshaft (901); a spline cylinder (9023) is slidably sleeved on the first spline rod (9021) and the second spline rod (9022); a first magnetic ring (9024) is fixed on both the rotating rod (6056) and the crankshaft (901); and a second magnetic ring (9025) is fixed at both ends of the spline cylinder (9023).

7. The textile air permeability testing device according to claim 4, characterized in that: A plurality of tension springs (10) distributed in an annular shape are connected between the air duct (8) and the partition (7).

8. The textile air permeability testing device according to claim 5, characterized in that: The inner wall of the circular ring (903) is provided with two arc-shaped plates (11), and the two arc-shaped plates (11) are distributed along the axis direction of the guide rod (905).

9. The textile air permeability testing device according to claim 1, characterized in that: The threaded sleeve at the bottom end of the lower air duct (3) is provided with a dustproof net shell (12).

10. The textile air permeability testing device according to claim 1, characterized in that: Slide grooves (13) are provided on opposite sides of the inner wall of the bracket (1), a connecting frame (14) is fixed on the upper air cylinder (2), and the connecting frame (14) is slidably inserted into the two slide grooves (13), a screw rod (15) is threaded through the bracket (1), and the end of the screw rod (15) is rotatably connected to the connecting frame (14).

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