A high-strength nonwoven fabric tensile property testing device

Abstract

The application relates to the technical field of tensile testing, and discloses a high-strength non-woven fabric tensile property testing device, which comprises a friction type winding mechanism and an adjustable driven mechanism, the inside of the device is provided with a hollow rotating column capable of rotating with a rotor of a driving motor, an upper limiting disc located on the axis of the hollow rotating column and capable of driving a conical friction body to move, a spiral spring capable of generating an upward elastic force on the upper limiting disc, and a threaded sleeve capable of changing the elastic strength of the spiral spring. The high-strength non-woven fabric tensile property testing device performs winding type tensile testing on non-woven fabrics. In the testing process, the friction resistance required to be overcome by the driving motor is rolling friction, and the device has the characteristics of small friction coefficient, thereby reducing the error caused by the friction resistance on the tensile result. Meanwhile, the rotor of the driving motor in the device can rotate all the time without exceeding the rated torque resistance of the rotor, thereby providing continuous and stable tensile force output.

Description

Technical Field

[0001] This invention relates to the field of tensile testing technology, specifically to a device for testing the tensile properties of high-strength nonwoven fabrics. Background Technology

[0002] Nonwoven fabric is a type of nonwoven material made by combining different types of fiber materials. It is usually bonded together by chemical bonding, thermal bonding, or mechanical methods. Due to its softness, strength, moisture absorption, and water resistance, it is widely used in medical and health, household products, and industrial applications. In the production of composite fiber nonwoven fabric, in order to evaluate the performance and service life of the material under actual use conditions, it is necessary to conduct sampling tensile performance tests on the composite fiber nonwoven fabric to ensure that the product meets the set performance standards and quality requirements, and to guarantee the consistency and reliability of the product.

[0003] For example, Chinese patent publication number "CN119534124A" discloses "a composite fiber nonwoven fabric tensile performance testing device". Its main structure includes a base, on which a U-shaped bracket and a limiting slide rail located directly below the horizontal section of the U-shaped bracket are fixedly installed on the upper end face. The limiting slide rail is provided with a stretching mechanism for stretching the composite fiber nonwoven fabric back and forth. When it is necessary to test the tensile performance of the composite fiber nonwoven fabric sample, one end of the composite fiber nonwoven fabric is first placed on the upper end face of the first arc plate. The two ends of the composite fiber nonwoven fabric are further clamped and fixed by the cooperation of the fixing part and the friction part. Then, the first motor is started to stretch the composite fiber nonwoven fabric laterally through the cooperation of the driving part and the execution part to test its tensile performance in the horizontal state.

[0004] However, in the actual tensile test, the torque resistance that the first motor needs to overcome includes the frictional resistance formed by the sum of the weights of the drive unit, the actuator unit, and various components mounted on their surfaces, as well as the tensile resistance formed on the nonwoven fabric. The aforementioned frictional resistance is the resistance formed by static friction, which will undoubtedly cause a large error in the test results. In addition, the rotor inside the motor must be in a rotating state during the movement, which will cause the support to be in a horizontal moving state. When the nonwoven fabric is stretched, the continuous rotation of the motor will cause the nonwoven fabric to be directly torn, and it cannot provide a stable tensile force to the nonwoven fabric. Summary of the Invention

[0005] To address the shortcomings of existing technologies, this invention provides a high-strength nonwoven fabric tensile performance testing device. This device performs a winding-type tensile test on the nonwoven fabric. During the test, the frictional resistance that the drive motor needs to overcome is rolling friction, which has a low coefficient of friction, thus reducing the error caused by frictional resistance in the tensile results. Simultaneously, the rotor of the drive motor in this device can rotate continuously without exceeding its rated torque resistance, thereby providing a continuous and stable tensile force output, thus solving the aforementioned technical problems.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a high-strength nonwoven fabric tensile performance testing device, comprising a vertical fixed plate with a fixed mounting plate on one side and a horizontal mounting plate on the other side of the vertical fixed plate, a drive motor fixedly mounted on one of the horizontal mounting plates via a first fixed base sleeve, and a first connecting plate fixedly mounted on the rotor end of the drive motor; further comprising a friction winding mechanism, which internally comprises a hollow winding roller rotatably mounted on the other two horizontal mounting plates and capable of winding the nonwoven fabric, and a conical friction body located inside the hollow winding roller and capable of driving the hollow winding roller to rotate under the action of friction; and an adjustable driven mechanism, which internally comprises a hollow rotating column capable of rotating with the rotor of the drive motor, an upper limit plate located on the axis of the hollow rotating column and capable of driving the conical friction body to move, a helical spring that generates an upward elastic force on the upper limit plate, and a threaded sleeve capable of changing the elastic strength of the helical spring.

[0007] Preferably, the friction winding mechanism includes a first rotating shaft, a longitudinal fabric insertion groove on the circumferential side of the hollow winding roller, a first longitudinal component movable cavity at the center of the hollow winding roller, a conical friction cavity formed by an inward convexity at the longitudinal center of the first longitudinal component movable cavity, a first shaft through hole at the top of the first longitudinal component movable cavity communicating with the space above it, a second connecting plate fixedly installed at the bottom of the hollow winding roller, the shaft of the hollow winding roller near its bottom and top ends being mounted in the sleeve hole of the second fixed base sleeve through bearings, and the second fixed base sleeve being fixedly connected to the vertical surface of the horizontal mounting plate, a third connecting plate fixedly installed at the top of the first rotating shaft, the shaft of the first rotating shaft passing through the first shaft through hole and a conical friction body fixedly installed at the bottom end that can be inserted into the conical friction cavity.

[0008] Preferably, the diameter of the top of the conical friction cavity is smaller than the diameter of its bottom, and the structural shape of the conical friction body is consistent with the structural shape of the conical friction cavity, forming a mutually abutting conical friction surface between the two.

[0009] Preferably, the depth and width of the fabric insertion groove are sufficient to allow one end of the nonwoven fabric being tested to be inserted into it.

[0010] Preferably, the adjustable driven mechanism includes a collar, the top of the hollow rotating column is provided with a first and fourth connecting plate fixedly connected to the first connecting plate, the bottom of the hollow rotating column is provided with an externally threaded rod integrally formed therewith, the hollow rotating column has a second longitudinal component movable cavity inside, the circumferential wall thickness of the hollow rotating column is provided with two symmetrical longitudinal grooves communicating with the second longitudinal component movable cavity, the center of the externally threaded rod is provided with a second shaft through hole, the hollow rotating column has an upper limit plate and a lower limit plate that can move along the axial direction of the second longitudinal component movable cavity placed inside the second longitudinal component movable cavity, and a fixedly installed between the upper limit plate and the lower limit plate. The coil spring in compression has a No. 3 shaft through hole with open ends at the center of the lower limit plate. Two L-shaped sliding rods that pass through the longitudinal sliding grooves and can move longitudinally along the longitudinal sliding grooves are fixedly installed on the side of the lower limit plate. The bottom end of the L-shaped sliding rod is fixedly installed on the upper surface of the collar. A threaded sleeve is installed inside the annular hole of the collar through a bearing. The center of the threaded sleeve has an internal thread hole that is installed on the external threaded rod body through a threaded structure. A No. 2 rotating shaft that passes through the No. 3 shaft through hole and the No. 2 shaft through hole is fixedly installed at the bottom of the upper limit plate. The bottom end of the No. 2 rotating shaft is provided with a second and fourth connecting plate that is fixedly connected to the No. 3 connecting plate.

[0011] Preferably, the threaded structure includes an internal thread structure disposed on the inner wall of the threaded sleeve and an external thread structure disposed on the external thread rod body, and the internal thread structure matches the external thread structure.

[0012] Preferably, the cross-sectional shapes of the third shaft perforation and the second shaft perforation are consistent with the cross-sectional shape of the second rotating shaft, both being polygonal structures, and the structural dimensions of the cross-sectional shapes of the third shaft perforation and the second shaft perforation match the structural dimensions of the cross-sectional shape of the second rotating shaft.

[0013] Preferably, it also includes a magnetic pole reaction mechanism, which has an upper permanent magnet fixedly installed at the bottom of the second connecting plate and capable of rotating with the second connecting plate, and a lower permanent magnet fixed directly below the upper permanent magnet and generating an upward repulsive force on the upper permanent magnet.

[0014] Preferably, the magnetic pole reaction mechanism includes a lower embedded plate and an upper embedded plate. The bottom end of the lower embedded plate and the top end of the upper embedded plate are respectively provided with a No. 5 connecting plate and a No. 6 connecting plate. The No. 6 connecting plate is fixedly connected to the bottom end of the No. 2 connecting plate. The lower embedded plate and the upper embedded plate are respectively provided with a concave lower embedded groove and an upper embedded groove at their opposite ends. The lower embedded groove and the upper embedded groove are respectively fixedly installed with a protruding lower permanent magnet and an upper permanent magnet.

[0015] Preferably, the lower permanent magnet and the upper permanent magnet have opposite magnetic poles at their opposite ends, and when the No. 5 connecting disc is fixedly installed, the repulsive force between the lower permanent magnet and the upper permanent magnet is consistent with the gravity of the hollow winding roller.

[0016] Compared with the prior art, the present invention provides a high-strength nonwoven fabric tensile property testing device, which has the following beneficial effects:

[0017] The nonwoven fabric is subjected to a winding tensile test. During the test, the frictional resistance that the drive motor needs to overcome is rolling friction, which has the characteristic of low friction coefficient. This reduces the error caused by frictional resistance to the tensile results. At the same time, the rotor of the drive motor in this device can rotate continuously without exceeding its own rated torque resistance, thereby providing continuous and stable tensile force output. Attached Figure Description

[0018] Figure 1 This is a perspective view of the present invention.

[0019] Figure 2 This is a three-dimensional cross-sectional view of the present invention.

[0020] Figure 3 This is a perspective view of the friction winding mechanism in this invention.

[0021] Figure 4 This is a three-dimensional cross-sectional view of the friction winding mechanism in this invention.

[0022] Figure 5 This is a perspective view of the adjustable driven mechanism in this invention.

[0023] Figure 6 This is a three-dimensional cross-sectional view of the adjustable driven mechanism in this invention.

[0024] Figure 7 This is a perspective view of the magnetic pole reaction mechanism in this invention.

[0025] Figure 8 This is a three-dimensional cross-sectional view of the magnetic pole reaction mechanism in this invention.

[0026] The components include: 1. Vertical fixed plate; 2. Fixed mounting plate; 3. Horizontal mounting plate; 4. First fixed base sleeve; 5. Drive motor; 6. First connecting plate; 7. Friction winding mechanism; 71. Hollow winding roller; 72. Fabric insert groove; 73. First longitudinal component movable cavity; 74. Conical friction cavity; 75. First shaft through hole; 76. Second connecting plate; 77. First rotating shaft; 78. Third connecting plate; 79. Conical friction body; 710. Second fixed base sleeve; 8. Adjustable driven mechanism; 81. Hollow rotating column; 82. First and fourth connecting plates; 83. External threaded rod; 84. 85. Longitudinal slide groove; 86. Shaft hole No. 2; 87. Upper limit plate; 88. Lower limit plate; 89. Shaft hole No. 3; 810. Helical spring; 811. L-shaped sliding connecting rod; 812. Collar; 813. Threaded sleeve; 814. Internal threaded hole; 815. Rotating shaft No. 2; 816. Connecting plates No. 2 and No. 4; 9. Magnetic pole reaction mechanism; 91. Lower embedded plate; 92. Lower embedded groove; 93. Connecting plate No. 5; 94. Upper embedded plate; 95. Upper embedded groove; 96. Connecting plate No. 6; 97. Lower permanent magnet; 98. Upper permanent magnet. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Please see Figure 1 and Figure 2 A high-strength nonwoven fabric tensile performance testing device includes a vertical mounting plate 1 with a fixed mounting plate 2 on one side and a horizontal mounting plate 3 on the other side of the vertical mounting plate 1, a drive motor 5 fixedly mounted on the vertical surface of one of the horizontal mounting plates 3 by a first fixed base sleeve 4, and a first connecting plate 6 fixedly mounted on the rotor end of the drive motor 5. First, the fixed mounting plate 2 is installed in the working area, then one end of the nonwoven fabric is fixed by a clamping device, and the other end of the nonwoven fabric is inserted into the fabric insert groove 72. The hollow take-up roller 71 is rotated so that the nonwoven fabric is in a pre-wound state. The pre-wound requires that the nonwoven fabric that is not yet wound is in a taut state, thus completing the preparation work before the test.

[0029] To implement the friction-wrap tensile testing function, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 3 and Figure 4A friction-type winding mechanism 7 is required, which contains a hollow winding roller 71 that is rotatably mounted on two other horizontal mounting plates 3 and capable of winding nonwoven fabric, and a conical friction body 79 located inside the hollow winding roller 71 and capable of driving the hollow winding roller 71 to rotate under the action of friction. The first rotating shaft 77 drives the conical friction body 79 to rotate, and the conical friction body 79 and the hollow winding roller 71 form a pressing contact surface at the inner wall of the conical friction cavity 74, and there is a corresponding friction force between them. This friction force will cause the hollow winding roller 71 to tend to rotate with the conical friction body 79. This causes the hollow take-up roller 71 to rotate and continuously take up the nonwoven fabric on its surface. When the friction between the hollow take-up roller 71 and the conical friction body 79 is insufficient to drive the nonwoven fabric to continue taking up the fabric, the unwound nonwoven fabric is at its rated tensile strength, indicating that the nonwoven fabric's tensile strength has reached the required rated value for testing. Since the conical friction body 79 is always rotating, the hollow take-up roller 71 generates a continuous tension on the nonwoven fabric, thereby testing the nonwoven fabric's tensile durability and realizing the friction take-up tensile test function.

[0030] For details regarding the specific structure of the friction winding mechanism 7, please refer to [link / reference]. Figure 3 and Figure 4 The hollow take-up roller 71 includes a first rotating shaft 77. A longitudinal fabric insertion groove 72 is provided on the circumferential side of the hollow take-up roller 71. A first longitudinal component movable cavity 73 is provided at the center of the hollow take-up roller 71. A conical friction cavity 74 is formed by an inward convexity at the longitudinal center of the first longitudinal component movable cavity 73. A first shaft through hole 75 communicating with the space above the first longitudinal component movable cavity 73 is provided at the top. A second connecting plate 76 is fixedly installed at the bottom end of the hollow take-up roller 71. The shaft of the hollow take-up roller 71, near its bottom and top ends, is installed in the sleeve hole of the second fixed base sleeve 710 via bearings. Furthermore, the second fixed base sleeve 710 is fixedly connected to the vertical surface of the horizontal mounting plate 3, and the top of the first rotating shaft 77 is fixedly installed with the third connecting plate 78. The shaft body of the first rotating shaft 77 passes through the first shaft body through hole 75 and the bottom end is fixedly installed with a conical friction body 79 that can be inserted into the conical friction cavity 74. The diameter of the top of the conical friction cavity 74 is smaller than the diameter of its bottom, and the structural shape of the conical friction body 79 is consistent with the structural shape of the conical friction cavity 74. The two form a conical friction surface that abuts against each other. The depth and width of the fabric insertion groove 72 are sufficient to allow one end of the non-woven fabric being tested to be inserted into its interior.

[0031] To achieve adjustable tensile strength, please refer to [link / reference needed]. Figure 1 , Figure 2 , Figure 5 and Figure 6An adjustable driven mechanism 8 is required, which contains a hollow rotating column 81 that rotates with the rotor of the drive motor 5, an upper limit plate 87 located on the axis of the hollow rotating column 81 and capable of driving the conical friction body 79, a helical spring 810 that exerts an upward elastic force on the upper limit plate 87, and a threaded sleeve 813 that can change the elastic strength of the helical spring 810. Rotating the threaded sleeve 813 in a directional manner, due to the threaded connection, causes the threaded sleeve 813 to drive the L-shaped sliding connecting rod 811 to move longitudinally. The L-shaped sliding connecting rod 811 then drives the lower limit plate 88 to move longitudinally. At this time, because the conical friction body 79 is stuck in the conical friction cavity 74, it cannot cause the upper limit plate 87 to move longitudinally, thus changing the... By changing the distance between the lower limit plate 88 and the upper limit plate 87, the elasticity of the helical spring 810 will change. The elastic force of the helical spring 810 on the upper limit plate 87 will be indirectly transferred to the contact surface between the conical friction body 79 and the hollow winding roller 71. The maximum static friction force between the conical friction body 79 and the hollow winding roller 71 is the measured value of the stretch of the nonwoven fabric, thereby realizing the adjustable function of the tensile strength. When the rotor drives the hollow rotating column 81 to rotate, due to the structural size and shape, the hollow rotating column 81 will drive the second rotating shaft 815 to rotate. The second rotating shaft 815 will then transmit the rotation to the first rotating shaft 77, causing the first rotating shaft 77 to rotate, thus realizing the transmission of the rotation effect.

[0032] For details regarding the specific structure of the adjustable driven mechanism 8, please refer to [link / reference]. Figure 5 and Figure 6The hollow rotating column 81 includes a collar 812. The top of the hollow rotating column 81 is provided with a first and fourth connecting disc 82 fixedly connected to the first connecting disc 6. The bottom of the hollow rotating column 81 is provided with an externally threaded rod 83 integrally formed with it. The interior of the hollow rotating column 81 is provided with a second longitudinal component movable cavity 84. Two symmetrical longitudinal grooves 85, communicating with the second longitudinal component movable cavity 84, are provided along the circumferential wall thickness of the hollow rotating column 81. The center of the externally threaded rod 83 is provided with a second shaft through hole 86. Inside the movable cavity 84 of the second longitudinal component, an upper limit plate 87 and a lower limit plate 88 are installed, capable of moving axially along the movable cavity 84. A compressed helical spring 810 is fixedly installed between the upper limit plate 87 and the lower limit plate 88. The lower limit plate 88 has a three-axis through hole 89 with both ends open at its center. Two L-shaped sliding connecting rods 811 are fixedly installed on the side of the lower limit plate 88, passing through the longitudinal slide grooves 85 and capable of moving longitudinally along the longitudinal slide grooves 85. The bottom end of the moving connecting rod 811 is fixedly installed on the upper surface of the collar 812. A threaded sleeve 813 is installed inside the annular hole of the collar 812 via a bearing. The center of the threaded sleeve 813 is provided with an internal threaded hole 814 that is installed on the external threaded rod 83 via a threaded structure. The bottom of the upper limit plate 87 is fixedly installed with a second rotating shaft 815 that passes through the third shaft through hole 89 and the second shaft through hole 86 in sequence. The bottom end of the second rotating shaft 815 is provided with a second and fourth connecting plate 8 that is fixedly connected to the third connecting plate 78. 16. The threaded structure includes an internal thread structure disposed on the inner wall of the threaded sleeve 813 and an external thread structure disposed on the rod body of the external thread rod 83. The internal thread structure matches the external thread structure. The cross-sectional shape of the third shaft through hole 89 and the second shaft through hole 86 is consistent with the cross-sectional shape of the second rotating shaft 815, both being polygonal structures. The cross-sectional dimensions of the third shaft through hole 89 and the second shaft through hole 86 match the cross-sectional dimensions of the second rotating shaft 815.

[0033] To further reduce the impact of frictional resistance on tensile testing errors, please refer to [link / reference]. Figure 1 , Figure 2 , Figure 7 and Figure 8 A magnetic pole reaction mechanism 9 needs to be set up. Inside the mechanism, there is an upper permanent magnet 98 that is fixedly installed at the bottom of the second connecting plate 76 and can rotate with the second connecting plate 76, and a lower permanent magnet 97 that is fixed directly below the upper permanent magnet 98 and generates an upward repulsive force against the upper permanent magnet 98. Since the repulsive force between the lower permanent magnet 97 and the upper permanent magnet 98 is consistent with the gravity of the hollow winding roller 71, and the frictional force formed by the repulsive force between the magnetic poles is air resistance, the torque resistance formed by air resistance can be ignored. This will reduce the torque resistance that the hollow winding roller 71 needs to overcome when rotating, thereby reducing the error of the tensile test work caused by the frictional resistance.

[0034] For the specific structure of the magnetic pole reaction mechanism 9, please refer to [link / reference]. Figure 7 and Figure 8 The device includes a lower embedding disc 91 and an upper embedding disc 94. The bottom end of the lower embedding disc 91 and the top end of the upper embedding disc 94 are respectively provided with a fifth connecting disc 93 and a sixth connecting disc 96. The sixth connecting disc 96 is fixedly connected to the bottom end of the second connecting disc 76. The lower embedding disc 91 and the upper embedding disc 94 are respectively provided with a concave lower embedding groove 92 and an upper embedding groove 95 at opposite ends. The lower embedding groove 92 and the upper embedding groove 95 are respectively fixedly installed with a protruding lower permanent magnet 97 and an upper permanent magnet 98. The magnetic poles of the lower permanent magnet 97 and the upper permanent magnet 98 are opposite at opposite ends. When the fifth connecting disc 93 is fixedly installed, the repulsive force between the lower permanent magnet 97 and the upper permanent magnet 98 is consistent with the gravity of the hollow take-up roller 71.

[0035] In use, the mounting plate 2 is installed in the working area, one end of the nonwoven fabric is fixed by the clamping device, and the other end of the nonwoven fabric is inserted into the fabric insert groove 72. The hollow take-up roller 71 is rotated to put the nonwoven fabric in a pre-wound state. The pre-wound requires that the nonwoven fabric that is not yet wound is in a taut state. The drive motor 5 is started. When the rotor drives the hollow rotating column 81 to rotate, due to the structural size and shape, the hollow rotating column 81 will drive the second rotating shaft 815 to rotate. The second rotating shaft 815 will then transmit the rotation to the first rotating shaft 77, causing the first rotating shaft 77 to rotate. The first rotating shaft 77 will drive the conical friction body 79 to rotate. The conical friction body 79 and the hollow take-up roller 71 are located at the conical... A compression contact surface is formed on the inner wall of the conical friction cavity 74, and there is a corresponding frictional force between the two. This frictional force causes the hollow take-up roller 71 to tend to rotate with the conical friction body 79, thereby causing the hollow take-up roller 71 to rotate and continuously take up the nonwoven fabric on the surface of the hollow take-up roller 71. When the frictional force between the hollow take-up roller 71 and the conical friction body 79 is no longer able to drive the nonwoven fabric to continue to take up the nonwoven fabric, the unwound nonwoven fabric is at the rated tensile strength, which means that the tensile state of the nonwoven fabric has reached the rated value required for the test. Since the conical friction body 79 can always rotate, the hollow take-up roller 71 generates a continuous tension on the nonwoven fabric, thereby testing the tensile durability of the nonwoven fabric.

[0036] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength nonwoven fabric tensile performance testing device, comprising a vertical fixed plate (1) with a fixed mounting plate (2) on one side and a horizontal mounting plate (3) on the other side of the vertical fixed plate (1), a drive motor (5) fixedly mounted on the vertical surface of one of the horizontal mounting plates (3) via a first fixed base sleeve (4), and a first connecting plate (6) fixedly mounted on the rotor end of the drive motor (5), characterized in that: It also includes, The friction winding mechanism (7) has a hollow winding roller (71) that is rotatably mounted on the other two horizontal mounting plates (3) and can wind up the nonwoven fabric, and a conical friction body (79) located inside the hollow winding roller (71) and can drive the hollow winding roller (71) to rotate under the action of friction. And an adjustable driven mechanism (8), which is provided with a hollow rotating column (81) that can rotate with the rotor of the drive motor (5), an upper limit plate (87) located on the axis of the hollow rotating column (81) and capable of driving the conical friction body (79) to move, a helical spring (810) that generates an upward elastic force on the upper limit plate (87), and a threaded sleeve (813) that can change the elastic strength of the helical spring (810). The friction winding mechanism (7) includes a first rotating shaft (77). The hollow winding roller (71) has a longitudinal fabric insertion groove (72) on its circumferential side. A first longitudinal component movable cavity (73) is located at the center of the hollow winding roller (71). A conical friction cavity (74) is formed at the longitudinal center of the first longitudinal component movable cavity (73) by an inward convex manner. A first shaft through-hole (75) connecting to the space above the first longitudinal component movable cavity (73) is provided at the top of the first longitudinal component movable cavity (73). The hollow winding roller (77... 1) The bottom end is fixedly installed with a second connecting plate (76). The hollow take-up roller (71) is installed in the sleeve hole of the second fixed base sleeve (710) by bearings on the shaft near its bottom and top ends. The second fixed base sleeve (710) is fixedly connected to the vertical surface of the horizontal mounting plate (3). The top end of the first rotating shaft (77) is fixedly installed with a third connecting plate (78). The shaft of the first rotating shaft (77) passes through the first shaft through hole (75) and the bottom end is fixedly installed with a conical friction body (79) that can be inserted into the conical friction cavity (74). It also includes a magnetic pole reaction mechanism (9), which has an upper permanent magnet (98) fixedly installed at the bottom of the second connecting plate (76) and capable of rotating with the second connecting plate (76), and a lower permanent magnet (97) fixed directly below the upper permanent magnet (98) and generating an upward repulsive force on the upper permanent magnet (98).

2. The high-strength nonwoven fabric tensile property testing device according to claim 1, characterized in that: The top diameter of the conical friction cavity (74) is smaller than the bottom diameter, and the structural shape of the conical friction body (79) is consistent with the structural shape of the conical friction cavity (74), forming a conical friction surface that abuts against each other.

3. The high-strength nonwoven fabric tensile property testing device according to claim 2, characterized in that: The depth and width of the fabric insert groove (72) are sufficient to allow one end of the nonwoven fabric being tested to be inserted into it.

4. The high-strength nonwoven fabric tensile property testing device according to claim 3, characterized in that: The adjustable driven mechanism (8) includes a collar (812). The top of the hollow rotating column (81) is provided with a first and fourth connecting plate (82) that is fixedly connected to the first connecting plate (6). The bottom of the hollow rotating column (81) is provided with an external threaded rod (83) integrally formed with it. The hollow rotating column (81) is provided with a second longitudinal component movable cavity (84). The circumferential wall thickness of the hollow rotating column (81) is provided with two symmetrical longitudinal grooves (85) that connect the second longitudinal component movable cavity (84). The center of the external threaded rod (83) is provided with a second shaft through hole (86). The hollow rotating column (81) has an upper limit plate (87) and a lower limit plate (88) that can move along the axial direction of the second longitudinal component movable cavity (84) inside the second longitudinal component movable cavity (84). A screw in a compressed state is fixedly installed between the upper limit plate (87) and the lower limit plate (88). The lower limit plate (88) has a three-shaft through hole (89) with open ends at the center. The lower limit plate (88) has two L-shaped sliding connecting rods (811) with two through longitudinal sliding grooves (85) fixedly installed on the side. The bottom end of the L-shaped sliding connecting rod (811) is fixedly installed on the upper surface of the collar (812). The collar (812) has a threaded sleeve (813) installed inside the ring hole through a bearing. The center of the threaded sleeve (813) has an internal thread hole (814) installed on the body of the external thread rod (83) through a threaded structure. The bottom of the upper limit plate (87) has a second rotating shaft (815) that passes through the three-shaft through hole (89) and the second shaft through hole (86) in sequence. The bottom end of the second rotating shaft (815) has a second and fourth connecting plate (816) fixedly connected to the third connecting plate (78).

5. The high-strength nonwoven fabric tensile property testing device according to claim 4, characterized in that: The threaded structure includes an internal threaded structure located on the inner circumference of the threaded sleeve (813) and an external threaded structure located on the body of the external threaded rod (83), and the internal threaded structure matches the external threaded structure.

6. The high-strength nonwoven fabric tensile property testing device according to claim 5, characterized in that: The cross-sectional shapes of the No. 3 shaft perforation (89) and the No. 2 shaft perforation (86) are consistent with the cross-sectional shape of the No. 2 rotating shaft (815), both being polygonal structures. Furthermore, the structural dimensions of the cross-sections of the No. 3 shaft perforation (89) and the No. 2 shaft perforation (86) match the structural dimensions of the cross-section of the No. 2 rotating shaft (815).

7. The high-strength nonwoven fabric tensile property testing device according to claim 1, characterized in that: The magnetic pole reaction mechanism (9) includes a lower embedded plate (91) and an upper embedded plate (94). The bottom end of the lower embedded plate (91) and the top end of the upper embedded plate (94) are respectively provided with a fifth connecting plate (93) and a sixth connecting plate (96). The sixth connecting plate (96) is fixedly connected to the bottom end of the second connecting plate (76). The lower embedded plate (91) and the upper embedded plate (94) are respectively provided with a concave lower embedded groove (92) and an upper embedded groove (95) at opposite ends. The lower embedded groove (92) and the upper embedded groove (95) are respectively fixedly installed with a protruding lower permanent magnet (97) and an upper permanent magnet (98).

8. The high-strength nonwoven fabric tensile property testing device according to claim 7, characterized in that: The lower permanent magnet (97) and the upper permanent magnet (98) have opposite magnetic poles at their opposite ends, and when the No. 5 connecting plate (93) is fixedly installed, the repulsive force between the lower permanent magnet (97) and the upper permanent magnet (98) is consistent with the gravity of the hollow take-up roller (71).

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