Device for detecting tearing force of coating cloth of air duct

Abstract

The utility model relates to the field of air duct cloth tear resistance detection, and discloses an air duct coating cloth tear force detection device which comprises a base, the bottom of the base is fixedly connected with supporting legs, the top of the base is fixedly connected with a fixing shell, a clamping mechanism is arranged in the fixing shell, a detection device is arranged in the base, and the clamping mechanism is arranged in the detection device. The detection device comprises a moving block, a clamp is fixedly connected to the left side of the moving block, a pull rope is fixedly connected to the right side of the moving block, a sliding block is fixedly connected to the end, away from the moving block, of the pull rope, and a connecting rod is hinged to the left side of the sliding block. According to the utility model, the compressed amplitude of the spring is linearly and positively correlated with the force applied to the two ends of the spring, so that the pulling force applied to the air duct cloth can be measured and calculated by measuring the displacement distance of the sleeve block through the distance sensor, and a worker can conveniently evaluate the tear resistance of the air duct coating cloth in cooperation with the industrial camera.

Description

Technical Field

[0001] This utility model relates to the field of tear resistance testing of wind tunnel fabric, and in particular to a tear force testing device for wind tunnel coated fabric. Background Technology

[0002] Ventilation duct cloth is made of high-strength polyester fiberglass woven into a coated base fabric, with modified PVC used as the surface film. The effective combination of high-strength base fabric and high-tech surface film results in ventilation duct cloth being mainly classified according to its use as: mining ventilation duct cloth, fiberglass ventilation duct cloth, flame-retardant ventilation duct cloth, fireproof ventilation duct cloth, industrial ventilation duct cloth, plastic-coated fiberglass cloth, tunnel ventilation duct cloth, and air guide duct cloth.

[0003] Due to the working environment and its own structure, the fabric of the duct is prone to tearing. Once the fabric tears over a long distance, not only is the repair cost high, but the repair time is also long, affecting the normal operation of production and causing huge economic losses. Therefore, it is necessary to use a tear force testing device for duct coated fabric to test the performance of the duct fabric. To this end, a tear force testing device for duct coated fabric is proposed to solve the above problems. Utility Model Content

[0004] To overcome the above deficiencies, this utility model provides a tear force testing device for wind tunnel coated fabric, which aims to improve the problem in the prior art that "a tear force testing device for wind tunnel coated fabric is needed to test the performance of wind tunnel fabric".

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a tear force testing device for wind tunnel coated fabric, comprising a base, a support leg fixedly connected to the bottom of the base, a fixed shell fixedly connected to the top of the base, a clamping mechanism provided inside the fixed shell, a testing device provided inside the base, the testing device comprising a movable block, a clamp fixedly connected to the left side of the movable block, a pull rope fixedly connected to the right side of the movable block, a slider fixedly connected to the end of the pull rope away from the movable block, a connecting rod hinged to the left side of the slider, a sleeve block hinged to the end of the connecting rod away from the slider, and the testing device further comprising a fixed pulley and a fixed rod.

[0006] As a further description of the above technical solution:

[0007] The clamping mechanism includes a threaded rod that passes through and is threaded onto the inner wall of the fixed housing, and a pressure block is rotatably connected to the right side of the threaded rod.

[0008] As a further description of the above technical solution:

[0009] The pressure block is slidably mounted on the inner wall of the fixed shell, and the clamp is fixedly mounted on the right side of the pressure block.

[0010] As a further description of the above technical solution:

[0011] The front and rear ends of the fixing rod are fixedly installed on the inner wall of the base, and the sleeve block is slidably installed on the circumferential surface of the fixing rod.

[0012] As a further description of the above technical solution:

[0013] The number of the sleeve blocks is set to two sets, and the two sets of sleeve blocks are elastically connected on the side that is close to each other by a spring, and the spring is sleeved on the outside of the fixed rod.

[0014] As a further description of the above technical solution:

[0015] A rotating shaft is fixedly connected to the inner wall of the fixed pulley. The rotating shaft is rotatably mounted on the inner wall of the base, and the surface of the pull rope is in contact with the circumferential surface of the fixed pulley.

[0016] As a further description of the above technical solution:

[0017] The detection device also includes an industrial camera, which is fixedly mounted on the top of the base.

[0018] As a further description of the above technical solution:

[0019] The detection device also includes a distance sensor, which is fixedly installed on the left side of the inner wall of the base.

[0020] This utility model has the following beneficial effects:

[0021] 1. In this utility model, through the cooperation of the moving block, clamp, pull rope, fixed pulley, rotating shaft, slider, connecting rod, sleeve block, fixed rod, and spring, the compression amplitude of the spring and the magnitude of the force on both ends of the spring are linearly positively correlated. Therefore, by measuring the displacement distance of the sleeve block by the distance sensor, the magnitude of the tensile force on the duct cloth can be calculated. With the help of an industrial camera, it is convenient for staff to evaluate the tear resistance of the duct coated cloth.

[0022] 2. In this utility model, the combination of the fixed shell, threaded rod, pressure block and clamp makes it convenient and quick to adjust the position of the wind duct cloth sample above the industrial camera, which is beneficial for the staff to calculate the tear displacement during the tearing process of the wind duct cloth, thereby improving the accuracy of the test results. Attached Figure Description

[0023] Figure 1 This is a right-side view of the overall three-dimensional structure of this utility model;

[0024] Figure 2 This is a left-side view of the overall three-dimensional structure of this utility model;

[0025] Figure 3 This is a three-dimensional cross-sectional view of the fixing shell and clamping mechanism in this utility model;

[0026] Figure 4 This is a three-dimensional cross-sectional view of the base and the detection mechanism in this utility model.

[0027] Legend:

[0028] 1. Base; 2. Support leg; 3. Fixed shell; 4. Threaded rod; 5. Pressure block; 6. Moving block; 7. Clamp; 8. Pull rope; 9. Fixed pulley; 10. Rotating shaft; 11. Slider; 12. Connecting rod; 13. Sleeve block; 14. Fixed rod; 15. Spring; 16. Industrial camera; 17. Distance sensor. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] Reference Figure 1 , Figure 2 This utility model provides an embodiment of a tear strength testing device for duct coated fabric, comprising a base 1, with a support leg 2 fixedly connected to the bottom of the base 1 to provide stable support and improve the overall stability of the device during operation. A fixed shell 3 is fixedly connected to the top of the base 1, and a clamping mechanism is provided inside the fixed shell 3. A testing device is provided inside the base 1. When the duct fabric is subjected to tearing force, its internal structure and intermolecular forces will be damaged, resulting in tearing of the material. The testing device simulates this tearing process and measures the force required during the tearing process to obtain the tear strength of the material.

[0031] Reference Figure 2 , Figure 3 The clamping mechanism includes a threaded rod 4, which is threaded through and installed on the inner wall of the fixed shell 3. A pressure block 5 is rotatably connected to the right side of the threaded rod 4. The rotation of the threaded rod 4 causes the pressure block 5 to move linearly left and right through the threaded conversion. The pressure block 5 is slidably installed on the inner wall of the fixed shell 3. The clamp 7 is fixedly installed on the right side of the pressure block 5 to fix the duct cloth sample in the clamp 7, ensuring that the duct cloth sample will not slide or move during the test.

[0032] Reference Figure 1 , Figure 4The testing device includes a movable block 6. A clamp 7 is fixedly connected to the left side of the movable block 6. The clamp 7 has a wave-tooth structure for its jaws, which can effectively prevent slippage of the sample without damaging the air duct cloth sample. This is the existing technology. A pull rope 8 for transmission is fixedly connected to the right side of the movable block 6. The pull rope 8 is non-elastic to ensure the accuracy of the test results. A slider 11 is fixedly connected to the end of the pull rope 8 away from the movable block 6. A connecting rod 12 in an inclined state is hinged to the left side of the slider 11. A sleeve block 13 is hinged to the end of the connecting rod 12 away from the slider 11. The testing device also includes a fixed pulley 9 and a fixed rod 14 in a horizontal state.

[0033] Reference Figure 4 The front and rear ends of the fixed rod 14 are fixedly installed on the inner wall of the base 1. The sleeve block 13 is slidably installed on the circumferential surface of the fixed rod 14. The sliding direction of the sleeve block 13 is back and forth. The number of sleeve blocks 13 is set to two sets. The two sets of sleeve blocks 13 are elastically connected on the side that is close to each other by a spring 15. The spring 15 is initially set to a naturally relaxed state without force. The spring 15 is sleeved on the outside of the fixed rod 14 to improve the stability of the spring 15 when it is compressed.

[0034] Reference Figure 1 , Figure 4 A rotating shaft 10 is fixedly connected to the inner wall of the fixed pulley 9. The rotating shaft 10 is rotatably mounted on the inner wall of the base 1. The surface of the pull rope 8 is in contact with the circumferential surface of the fixed pulley 9. The fixed pulley 9 has the function of changing the direction of force transmission without changing the magnitude of force transmission. This is existing technology. The detection device also includes an industrial camera 16 for observing the tearing of the duct cloth. The industrial camera 16 is fixedly mounted on the top of the base 1. The detection device also includes a distance sensor 17, which is fixedly mounted on the left side of the inner wall of the base 1. It is used to measure the tearing displacement during the tearing process of the duct cloth. The sensor has high precision and high stability to ensure the accuracy of the measurement results. This is existing technology.

[0035] Working principle: When in use, first prepare the sample according to the relevant standards to ensure that the size, shape and condition of the duct cloth sample meet the test requirements. Then, fix the duct cloth on the top of the base 1 with the clamp 7 and make the duct cloth above the industrial camera 16. Then rotate the threaded rod 4. The rotation of the threaded rod 4 causes the pressure block 5 to move to the left through the thread conversion. The displacement of the pressure block 5 drives the clamp 7 to move and tighten the duct cloth to avoid wrinkles.

[0036] Continue rotating the threaded rod 4, causing the clamp 7 to move the duct cloth to the left, which in turn pulls the moving block 6 to the left. The displacement of the moving block 6, through the transmission of the pull rope 8, pulls the slider 11 to the right. The displacement of the slider 11, through the transmission of the connecting rod 12, causes the two sets of sleeve blocks 13 to move closer to each other. The two sets of sleeve blocks 13 moving closer to each other will compress the spring 15, causing the length of the spring 15 to be compressed. According to Hooke's theorem, the extent of compression of the spring 15 is linearly positively correlated with the magnitude of the force on both ends of the spring 15. Therefore, by measuring the displacement distance of the sleeve block 13 by the distance sensor 17, the magnitude of the tensile force on the duct cloth can be calculated. Combined with the observation of the damage condition of the duct cloth surface by the industrial camera 16, it is convenient for the staff to assess the tear resistance of the duct coated cloth, providing a strong guarantee for product quality control and safe production.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A tear force testing device for coated fabric in a wind tunnel, comprising a base (1), characterized in that: The base (1) is fixedly connected to a support leg (2) at the bottom and a fixed shell (3) is fixedly connected to the top of the base (1). A clamping mechanism is provided inside the fixed shell (3). A detection device is provided inside the base (1). The detection device includes a moving block (6). A clamp (7) is fixedly connected to the left side of the moving block (6). A pull rope (8) is fixedly connected to the right side of the moving block (6). A slider (11) is fixedly connected to the end of the pull rope (8) away from the moving block (6). A connecting rod (12) is hinged to the left side of the slider (11). A sleeve block (13) is hinged to the end of the connecting rod (12) away from the slider (11). The detection device also includes a fixed pulley (9) and a fixed rod (14).

2. The tear force testing device for air duct coated fabric according to claim 1, characterized in that: The clamping mechanism includes a threaded rod (4), which is threaded through and threaded onto the inner wall of the fixed shell (3), and a pressure block (5) is rotatably connected to the right side of the threaded rod (4).

3. The tear force testing device for air duct coated fabric according to claim 2, characterized in that: The pressure block (5) is slidably mounted on the inner wall of the fixed shell (3), and the clamp (7) is fixedly mounted on the right side of the pressure block (5).

4. The tear force testing device for air duct coated fabric according to claim 1, characterized in that: The front and rear ends of the fixing rod (14) are fixedly installed on the inner wall of the base (1), and the sleeve block (13) is slidably installed on the circumferential surface of the fixing rod (14).

5. The tear force testing device for air duct coated fabric according to claim 4, characterized in that: The number of the sleeve blocks (13) is set to two sets, and the two sets of sleeve blocks (13) are elastically connected on the side close to each other by a spring (15), and the spring (15) is sleeved on the outside of the fixing rod (14).

6. The tear force testing device for air duct coated fabric according to claim 5, characterized in that: A rotating shaft (10) is fixedly connected to the inner wall of the fixed pulley (9). The rotating shaft (10) is rotatably installed on the inner wall of the base (1). The surface of the pull rope (8) is in contact with the circumferential surface of the fixed pulley (9).

7. The tear force testing device for air duct coated fabric according to claim 1, characterized in that: The detection device also includes an industrial camera (16), which is fixedly mounted on the top of the base (1).

8. The tear force testing device for air duct coated fabric according to claim 1, characterized in that: The detection device also includes a distance sensor (17), which is fixedly installed on the left side of the inner wall of the base (1).

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