A device for testing air permeability of textile fabrics

Abstract

The present invention relates to the technical field of textile fabric detection, and in particular to a device for detecting the air permeability of textile fabrics, including a detection chassis, wherein the detection chassis is provided with an upper cavity and a lower cavity that are connected to each other, a load-bearing bracket is fixedly installed in the lower end of the lower cavity, and a driving motor is fixedly installed on the load-bearing bracket, the detection chassis is provided with a first limiting mechanism for fixing the fabric from the left and right sides through the driving motor, and a load-bearing bracket is symmetrically arranged in the upper cavity. The present invention arranges a ball screw driven to rotate by a driving motor in the detection chassis, and uses the ball screw and a lifting nut to pull the guide block and the guide rod; by arranging a load-bearing bracket that is symmetrical in front and back in the upper cavity, the fabric is clamped and limited from the front and back sides; a supercharger is used to infuse sulfur dioxide gas into the fabric fixed to different degrees, and by observing whether the magenta solution in the reaction tank fades, it is judged whether the sulfur dioxide gas has passed through the fabric.

Description

Technical Field

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

[0002] Knitted fabrics are classified into two categories according to the weaving method: weft knitted fabrics and warp knitted fabrics. Weft knitted fabrics are usually made of low-elastic polyester yarn or special-shaped polyester yarn, nylon yarn, cotton yarn, wool yarn, etc., and are woven on various weft knitting machines using plain stitch, altered plain stitch, rib plain stitch, double rib plain stitch, jacquard stitch, terry stitch, etc.

[0003] In order to ensure the air permeability of textile fabrics, under existing conditions, a fabric air permeability detection device such as the one disclosed in the announcement number CN213986113U is often used for detection. By manipulating the marking component, it can quickly and timely mark when the air permeability is detected to be unqualified, thereby improving the detection efficiency, and can quickly divide each area, efficiently detect, and mark in time. The detection efficiency is high, but the fabric structure is large and there are differences in parts, so multi-point testing is required during the detection, but it lacks supporting limit and adjustment measures:

[0004] First, it is impossible to fix irregularly shaped textile fabrics, which makes it impossible to output gas to single-layer textile fabrics, making it difficult to perform air permeability testing;

[0005] Secondly, the structure of textile fabrics is ductile. Existing testing equipment cannot adjust the structure according to the textile fabrics and cannot output gas to textile fabrics at different tension and relaxation levels, resulting in large errors in air permeability testing and inability to determine the authenticity of the air permeability of textile fabrics.

[0006] Finally, existing detection technologies use technical means that are difficult to observe with the naked eye. In particular, many types of gases are invisible to the naked eye. They can only be judged by observing whether there is wind generated by airflow, which is not only abstract but also seriously affects the judgment. Summary of the invention

[0007] The purpose of the present invention is to solve the problem that it is difficult to detect the air permeability of textile fabrics in the prior art, and to propose a textile fabric air permeability detection device.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A device for detecting the air permeability of textile fabrics, comprising a detection chassis, wherein the detection chassis is provided with an upper cavity and a lower cavity which are connected to each other, a load-bearing bracket is fixedly installed in the lower end of the lower cavity, and a driving motor is fixedly installed on the load-bearing bracket, the detection chassis is provided with a first limiting mechanism for fixing the fabric from the left and right sides through the driving motor, load-bearing brackets are symmetrically arranged in the upper cavity, and a driving cylinder is fixedly installed on the load-bearing bracket, the detection chassis is provided with a second limiting mechanism for fixing the fabric from the front and back sides through the driving cylinder, and the detection chassis is provided with a testing mechanism for detecting the air tightness of the textile fabric through the upper cavity.

[0010] Preferably, the upper cavity and the lower cavity are distributed from top to bottom, and the detection chassis is opened at both ends of the upper cavity and the lower cavity, and the detection chassis is symmetrically provided with long guide holes connecting the upper cavity and the lower cavity.

[0011] Preferably, the first limiting mechanism includes a ball screw rotatably installed in the lower cavity and fixedly connected to the output end of the driving motor, and a lifting nut is matched with the ball screw, and the lifting nut is integrally connected to a limit rod slidably sleeved in the detection chassis, and a guide vertical groove and a guide transverse groove are provided in the upper cavity, and a guide block movably pulled by the lifting nut is fixedly sleeved in the guide vertical groove, and a guide rod movably pulled by the guide block is slidably sleeved in the guide transverse groove, and a limit clamp for sleeved left and right sides of the fabric is integrally connected to the guide rod, a limited long hole is provided in the guide rod, and a limit block fixed by bolts is slidably sleeved in the limit long hole, a limit pressing piece slidably sleeved in the limit clamp is movably pulled by the limit block and used to press the left and right sides of the fabric, and a reset spring welded on the limit clamp is fixedly sleeved on the limit pressure piece.

[0012] Preferably, a first traction link is pin-connected between the lifting nut and the guide block, a second traction link is pin-connected between the guide block and the guide rod and connected to the pin of the first traction link, and a third traction link is pin-connected between the limit block and the limit pressure piece.

[0013] Preferably, the second limiting mechanism includes a synchronous driving plate fixedly connected to the output end of the driving cylinder, and the pin shaft on the load-bearing bracket is equipped with a limiting clamping plate which is movably pulled by the synchronous driving plate and is used to clamp the front and rear sides of the fabric.

[0014] Preferably, a fourth traction link is pin-connected between the synchronous drive plate and the limiting clamping plate.

[0015] Preferably, the testing mechanism includes a support frame fixedly installed in the upper cavity, and a container tank filled with sulfur dioxide gas is fixedly installed on the support frame, a booster extending into the container tank is fixedly installed in the upper cavity, a sealing cover is fixedly installed at the top position of the detection chassis, and a reaction tank filled with magenta solution and with an open structure is fixedly connected to the sealing cover.

[0016] Preferably, a nozzle that movably contacts the fabric is integrally connected to the top of the container tank.

[0017] Compared with the prior art, the present invention has the following advantages:

[0018] 1. The present invention sets a ball screw driven to rotate by a driving motor in the detection chassis, and uses the ball screw and the lifting nut to pull the guide block and the guide rod, so that the guide rod supports the limit clamp to move left and right. At the same time, the limit pressure piece is used in the limit clamp to achieve limit fixation, so as to clamp and limit the fabric from the left and right sides.

[0019] 2. The present invention provides a front-to-back symmetrical load-bearing bracket in the upper cavity, and provides a limiting clamp pulled by a driving cylinder in the load-bearing bracket to clamp and limit the fabric from the front and back sides.

[0020] 3. The present invention sets a ball screw driven to rotate by a driving motor, and utilizes the lifting nut on the ball screw to drive the first traction link and the second traction link to deflect, so that the limit clamps used to fix the left and right sides of the fabric can be adjusted to move telescopically in the horizontal direction, thereby controlling the fabric to be fixed with different degrees of tension and relaxation, so as to facilitate comparative detection experiments.

[0021] 4. The present invention sets a container tank filled with sulfur dioxide gas in the upper cavity, uses a supercharger to infuse sulfur dioxide gas into the fabrics fixed to different degrees, and judges whether the sulfur dioxide gas penetrates the fabric by observing whether the fuchsin solution in the reaction tank fades. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic diagram of the structure of a device for testing the air permeability of textile fabrics proposed by the present invention;

[0023] Figure 2 A bottom view of a device for testing air permeability of textile fabrics proposed by the present invention;

[0024] Figure 3 A side sectional view of a device for testing air permeability of textile fabrics proposed by the present invention;

[0025] Figure 4 This is an enlarged schematic diagram of the structure of part A of a textile fabric air permeability testing device proposed by the present invention;

[0026] Figure 5 A front cross-sectional view of a device for testing air permeability of textile fabrics proposed by the present invention;

[0027] Figure 6 This is an enlarged schematic diagram of the structure of part B of a textile fabric air permeability testing device proposed by the present invention.

[0028] In the figure: 1. detection chassis; 2. upper cavity; 3. lower cavity; 4. guide long hole; 5. load-bearing bracket; 6. drive motor; 7. ball screw; 8. lifting nut; 9. guide vertical groove; 10. guide horizontal groove; 11. guide block; 12. guide rod; 13. first traction link; 14. second traction link; 15. limit clamp; 16. limit long hole; 17. limit block; 18. limit pressure piece; 19. reset spring; 20. third traction link; 21. load-bearing bracket; 22. limit splint; 23. drive cylinder; 24. synchronous drive plate; 25. fourth traction link; 26. support frame; 27. container tank; 28. supercharger; 29. ​​sealing cover; 30. reaction tank. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0030] Reference Figure 1-Figure 6 A device for testing the air permeability of textile fabrics includes a testing chassis 1, in which an upper cavity 2 and a lower cavity 3 are connected. The testing chassis 1 is designed in layers to facilitate air permeability testing in a relatively closed space.

[0031] A load-bearing bracket 5 is fixedly installed in the lower end of the lower cavity 3, and a driving motor 6 is fixedly installed on the load-bearing bracket 5. The detection box 1 is provided with a first limiting mechanism for fixing the fabric from the left and right sides through the driving motor 6. The first limiting mechanism includes a ball screw 7 rotatably installed in the lower cavity 3 and fixedly connected to the output end of the driving motor 6, and a lifting nut 8 is matched with the ball screw 7. A limiting rod slidably mounted in the detection box 1 is integrally connected to the lifting nut 8. Under the guiding and limiting action of the limiting rod, the lifting nut 8 is reciprocated and lifted in the vertical direction with the ball screw 7. A guide vertical groove 9 and a guide transverse groove 10 are opened in the upper cavity 2. A guide block 11 movably pulled by the lifting nut 8 is fixedly mounted in the guide vertical groove 9, and a guide block 11 movably pulled by the lifting nut 8 is slidably mounted in the guide transverse groove 10. The guide rod 12 is movably pulled by the guide block 11, and under the pulling action of the lifting nut 8, the guide rod 12 is horizontally telescopically moved, so as to pull and tighten the fabric from the left and right sides, so that the fabric is fixed with different degrees of tension. A limiting clamp 15 for fitting the left and right sides of the fabric is integrally connected to the guide rod 12. A limiting long hole 16 is provided in the guide rod 12, and a limiting block 17 fixed by bolts is slidably fitted in the limiting long hole 16. A limiting pressure piece 18 movably pulled by the limiting block 17 and used to press the left and right sides of the fabric is slidably fitted in the limiting clamp 15, and a return spring 19 welded on the limiting clamp 15 is fixedly fitted on the limiting pressure piece 18. Under the pressing and limiting action of the limiting pressure piece 18, the left and right sides of the fabric are fixed in the limiting clamp 15.

[0032] A load-bearing bracket 21 is symmetrically arranged in the upper cavity 2, and a driving cylinder 23 is fixedly installed on the load-bearing bracket 21. The detection chassis 1 is provided with a second limiting mechanism for fixing the fabric from the front and rear sides through the driving cylinder 23. The second limiting mechanism includes a synchronous driving plate 24 fixedly connected to the output end of the driving cylinder 23. A limiting clamp 22 is installed on the pin shaft on the load-bearing bracket 21, which is movably pulled by the synchronous driving plate 24 and is used to clamp the front and rear sides of the fabric. The synchronous driving plate 24 is pulled horizontally to pull the limiting clamps 22 symmetrically arranged above and below, and the front and rear sides of the fabric are clamped and limited by the limiting clamps 22 deflected in opposite directions.

[0033] The detection chassis 1 is provided with a testing mechanism for detecting the air tightness of textile fabrics through the upper cavity 2, the testing mechanism includes a support frame 26 fixedly installed in the upper cavity 2, and a container tank 27 filled with sulfur dioxide gas is fixedly installed on the support frame 26, a booster 28 extending into the container tank 27 is fixedly installed in the upper cavity 2, a sealing cover 29 is fixedly installed at the top position of the detection chassis 1, and a reaction tank 30 filled with magenta solution and having an open structure is fixedly connected to the sealing cover 29, the horizontally fixed fabric is abutted against the nozzle of the container tank 27, and the sulfur dioxide gas is discharged to the fabric by applying pressure. If the magenta solution fades, it can be determined that the sulfur dioxide gas has passed through the fabric. If there is no magenta solution and no fading, it can be determined that the sulfur dioxide gas has not passed through the fabric. The reaction tank 30 adopts a transparent glass bottle, and a transparent glass window is provided on the outer wall of the detection chassis 1 corresponding to the upper cavity 2 to facilitate manual observation of the reaction tank 30.

[0034] It is worth noting that by heating the faded fuchsin solution, the fuchsin solution can be restored to its original color for easy reuse.

[0035] Based on the above technical means, further extension:

[0036] Please refer to the instruction manual for details Figure 3 With attached Figure 5 The upper cavity 2 and the lower cavity 3 are distributed from top to bottom, and the detection chassis 1 is opened at both ends of the upper cavity 2 and the lower cavity 3. A guide long hole 4 connecting the upper cavity 2 and the lower cavity 3 is symmetrically opened in the detection chassis 1. The guide long hole 4 is used to guide and limit the first traction link 13 to ensure the stability of the deflection of the second traction link 14.

[0037] Please refer to the instruction manual for details Figure 5 A first traction link 13 is pin-connected between the lifting nut 8 and the guide block 11, a second traction link 14 pin-connected to the first traction link 13 is pin-connected between the guide block 11 and the guide rod 12, and a third traction link 20 is pin-connected between the limit block 17 and the limit pressure piece 18, so that the limit pressure piece 18 can be vertically extended and retracted in the limit clamp 15 to facilitate balanced pressure and limit of the left and right sides of the fabric.

[0038] Please refer to the instruction manual for details Figure 6 A fourth traction link 25 is pin-connected between the synchronous drive plate 24 and the limiting clamping plate 22 .

[0039] Please refer to the instruction manual for details Figure 3 A nozzle that is movable against the fabric is integrally connected to the top of the container tank 27. It is worth noting that the nozzle is a flat structure that is against the fixed fabric.

[0040] It should be noted that the specific models and specifications of the drive motor 6, the drive cylinder 23 and the supercharger 28 need to be selected and determined according to the actual specifications of the device, and the specific selection calculation method adopts the existing technology in this field, so it is not repeated here.

[0041] The present invention can be explained by the following operation mode:

[0042] The driving cylinder 23 is controlled to open in the upper cavity 2, and the output end of the contracted driving cylinder 23 drives the synchronous driving plate 24 to move. The synchronous driving plate 24 pulls the limiting clamping plate 22 to deflect through the fourth traction link 25, so as to clamp and limit the front and rear sides of the fabric;

[0043] The left and right sides of the fabric are mounted in the limiting fixture 15, and the limiting block 17 is pushed horizontally. The limiting block 17 supports the limiting pressing piece 18 to move downward through the third traction link 20, so as to suppress and limit the left and right sides of the fabric in the limiting fixture 15;

[0044] The driving motor 6 is controlled to be turned on, and the output end of the driving motor 6 drives the ball screw 7 to rotate, so that the lifting nut 8 pulls the second traction link 14 through the first traction link 13, and the second traction link 14 drives the guide rod 12 to extend, so as to use the limit clamp 15 to reversely pull and fix the fabric;

[0045] The supercharger 28 is controlled to be turned on, and the supercharger 28 squeezes the sulfur dioxide gas in the container tank 27 to be ejected from the nozzle;

[0046] Observe whether the fuchsin solution in the reaction tank 30 in the upper cavity 2 fades. If it fades, it means that the sulfur dioxide gas penetrates the fabric. If it does not fade, it means that the sulfur dioxide gas does not penetrate the fabric.

[0047] It is worth mentioning that the lifting nut 8 on the ball screw 7 is used to drive the first traction link 13 and the second traction link 14 to deflect, so that the limit clamp 15 used to fix the left and right sides of the fabric can be adjusted in the horizontal direction, thereby controlling the fabric to be fixed with different degrees of tension and relaxation, so as to facilitate comparative detection experiments.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A textile fabric air permeability testing device, comprising a testing box (1), characterized in that: The detection box (1) is provided with an upper cavity (2) and a lower cavity (3) which are connected to each other; a load-bearing bracket (5) is fixedly installed in the lower end of the lower cavity (3), and a driving motor (6) is fixedly installed on the load-bearing bracket (5); the detection box (1) is provided with a first limit mechanism for fixing the fabric from the left and right sides through the driving motor (6); a load-bearing bracket (21) is symmetrically arranged in the upper cavity (2), and a driving cylinder (23) is fixedly installed on the load-bearing bracket (21); the detection box (1) is provided with a second limit mechanism for fixing the fabric from the front and back sides through the driving cylinder (23); and the detection box (1) is provided with a testing mechanism for detecting the air tightness of the textile fabric through the upper cavity (2); The testing mechanism comprises a support frame (26) fixedly mounted in the upper cavity (2), and a container tank (27) filled with sulfur dioxide gas is fixedly mounted on the support frame (26); a booster (28) extending into the container tank (27) is fixedly mounted in the upper cavity (2); a sealing cover (29) is fixedly mounted at the top position of the detection chassis (1), and a reaction tank (30) filled with a fuchsin solution and having an open structure is fixedly connected to the sealing cover (29); The top of the container tank (27) is integrally connected with a nozzle that movably contacts the fabric; The horizontally fixed fabric is against the nozzle of the container tank (27), and the sulfur dioxide gas is discharged toward the fabric by applying pressure. If the fuchsin solution fades, it can be determined that the sulfur dioxide gas has passed through the fabric. If the fuchsin solution does not fade, it can be determined that the sulfur dioxide gas has not passed through the fabric. The reaction tank (30) is a transparent glass bottle, and a transparent glass window is provided on the outer wall of the detection chassis (1) corresponding to the upper cavity (2) to facilitate manual observation of the reaction tank (30).

2. A textile fabric air permeability testing device according to claim 1, characterized in that: The upper cavity (2) and the lower cavity (3) are arranged from top to bottom, and the detection box (1) is opened at both ends of the upper cavity (2) and the lower cavity (3), and a guide long hole (4) connecting the upper cavity (2) and the lower cavity (3) is symmetrically provided in the detection box (1); The first limiting mechanism comprises a ball screw (7) rotatably mounted in the lower cavity (3) and fixedly connected to the output end of the drive motor (6), and a lifting nut (8) is mounted on the ball screw (7), and a limiting rod slidably mounted in the detection chassis (1) is integrally connected to the lifting nut (8), and a guide vertical groove (9) and a guide horizontal groove (10) are provided in the upper cavity (2), a guide block (11) movably pulled by the lifting nut (8) is fixedly mounted in the guide vertical groove (9), and a guide block (11) movably pulled by the lifting nut (8) is slidably mounted in the guide horizontal groove (10). 1) a guide rod (12) for movable traction, wherein a limiting clamp (15) for fitting the left and right sides of the fabric is integrally connected to the guide rod (12), a limiting long hole (16) is provided in the guide rod (12), and a limiting block (17) fixed by bolts is slidably fitted in the limiting long hole (16), a limiting pressing piece (18) movably pulled by the limiting block (17) and used for pressing the left and right sides of the fabric is slidably fitted in the limiting clamp (15), and a return spring (19) welded to the limiting clamp (15) is fixedly fitted on the limiting pressing piece (18); A first traction link (13) is pin-connected between the lifting nut (8) and the guide block (11), a second traction link (14) pin-connected to the first traction link (13) is pin-connected between the guide block (11) and the guide rod (12), and a third traction link (20) is pin-connected between the limit block (17) and the limit pressure piece (18).

3. A textile fabric air permeability testing device according to claim 1, characterized in that: The second limiting mechanism comprises a synchronous driving plate (24) fixedly connected to the output end of the driving cylinder (23), and a limiting clamping plate (22) is mounted on the pin on the load-bearing bracket (21) and is movably pulled by the synchronous driving plate (24) and is used to clamp the front and rear sides of the fabric.

4. A textile fabric air permeability testing device according to claim 3, characterized in that: A fourth traction link (25) is pin-connected between the synchronous drive plate (24) and the limit clamping plate (22).

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