Rotary tensile test structure for washable polyester grey cloth

Abstract

The utility model discloses a rotary tensile test structure for washing-resistant terylene grey cloth, and relates to the technical field of tensile test of terylene grey cloth. The rotary tensile test structure comprises a bottom plate, a PLC (programmable logic controller) and a touch screen are fixedly mounted above the bottom plate, and a stretching mechanism for stretching the grey cloth and a fixing mechanism for fixing two ends of a grey cloth sample are mounted above the bottom plate. The stretching mechanism comprises sliding rails fixed to the left side and the right side of a bottom plate, the rotating speed of a winding motor and the retraction rate of a stretching piston are coordinated through a PLC so that the winding tightness can be guaranteed, a ratchet wheel at one end of a limiting pipe can prevent the limiting pipe from rotating under the limitation of a pawl, the stretching piston stretches after winding is completed, and a gray fabric sample is stretched. According to the mode, the pressing plate in the limiting pipe only plays a temporary fixing role, the stress contact surface is enlarged through multi-layer wrapping, the unit area pressure is reduced, and therefore the risk of local indentation or fiber breakage is reduced.

Description

Technical Field

[0001] This utility model relates to the field of tensile testing technology for polyester fabrics, specifically a rotating tensile testing structure for washable polyester fabrics. Background Technology

[0002] Tensile strength testing is not only a data acquisition tool, but also a bridge connecting the physical properties of textiles with practical applications. By quantifying mechanical parameters, it helps industry professionals make scientific decisions in design, production, and supervision, ultimately achieving a balance between product performance, safety, and economy. For special applications (such as smart textiles), advanced testing methods such as dynamic tensile testing and multi-axial loading are also required.

[0003] The existing Chinese utility model patent with announcement number CN215866184U discloses a textile tensile strength testing device, which includes a placement plate. Two pressing devices are provided at the front end of the placement plate and are respectively fixed at the left and right sides of the placement plate. The utility model has a reasonable structural design, is easy to use, and can perform fabric tensile strength testing in a simple and convenient way, thereby improving the efficiency of fabric tensile strength testing.

[0004] The aforementioned textile tensile strength testing device fixes both ends of the sample by two sets of pressing devices. This method can cause stress concentration at the edge of the sample in contact with the pressing devices, resulting in the sample breaking in the non-test area near the clamping part, affecting the accuracy of the data. Furthermore, this method cannot record the ultimate tensile force that the sample can withstand. The test data only reflects the tensile performance by the distance between the two ends of the sample after stretching, and cannot intuitively display the test results. Utility Model Content

[0005] To address the shortcomings of existing technologies, this invention provides a rotating tensile testing structure for washable polyester fabrics, which solves the problems of test results not being displayed intuitively and stress concentration at the edges of the fixed part.

[0006] To achieve the above objectives, this utility model is implemented through the following technical solution: a rotating tensile testing structure for washable polyester fabric, including a base plate, a PLC controller and a touch screen fixedly installed on the top of the base plate, a stretching mechanism for stretching the fabric, and a fixing mechanism for fixing both ends of the fabric sample.

[0007] The tensioning mechanism includes slide rails fixed to the left and right sides of the base plate. A support frame is movably installed inside the slide rails. A pressure sensor is fixedly installed on one side of the support frame, and a tensioning piston is fixedly installed on one end of the pressure sensor.

[0008] The fixing mechanism includes a stepper motor fixedly installed on one side of the support frame. A fixing frame is installed on the fixing rod at the end of the stepper motor's shaft. A winding motor is fixedly installed on one side of the fixing frame. A gear is fixedly installed on the outside of the winding motor's shaft. A limit tube is movably installed inside the fixing frame. A pneumatic piston is fixedly installed inside the limit tube. A pressure plate is fixedly installed on the movable end of the pneumatic piston. A toothed ring is fixedly installed at the bottom end of the limit tube.

[0009] Preferably, the fixing mechanism further includes a guide post installed inside the fixing frame, a ratchet fixedly installed at the top of the limiting tube, a limiting frame fixedly installed above the fixing frame, a spring fixedly installed inside the limiting frame, a pawl fitted below the limiting frame, and a connecting rod movably installed above the pawl.

[0010] Preferably, the support frame and the slide rail form a sliding connection, the support frame is installed symmetrically on the front and rear sides of the slide rail, and the pressure sensors between the support frames at the front and rear ends of the slide rail are respectively fixedly connected to the tension piston.

[0011] Preferably, the fixed frame and the support frame are rotatably connected, and the winding motor is respectively installed on the left side of the fixed frame behind the slide rail and the right side of the fixed frame in front of the slide rail.

[0012] Preferably, the limiting tube is rotatably connected to the fixing frame via a bearing, and the limiting tube has an opening structure on the front side of its center. There are four pneumatic pistons, which are symmetrically installed on the inner wall of the limiting tube with the center of the limiting tube as a reference. The gear ring and the gear mesh with each other.

[0013] Preferably, the limiting frame is mirror-symmetrically installed on the top of the fixed frame with the center of the limiting tube as the reference. The pawl and the limiting frame are slidably connected, and the pawl is fixedly connected to the other end of the spring inside the limiting frame. The center of the connecting rod is connected by a pin, and the two ends of the connecting rod are rotatably connected to the pawls on both sides by pins.

[0014] Beneficial effects

[0015] This invention provides a rotating tensile testing structure for washable polyester fabrics. Compared with the prior art, it has the following advantages:

[0016] (1) The rotating tensile test structure for washable polyester fabric has a limiting tube. The pneumatic piston inside the limiting tube can adjust the spacing of the pressure plates to clamp one end of the fabric. In the initial state, the stretching piston is at the elongation limit. After the fabric is fixed at both ends, the winding motor drives the limiting tube to rotate through the gear on the outside of the winding motor shaft and the toothed ring at one end of the limiting tube. At the same time, the stretching piston retracts and winds the fabric around the outside of the limiting tube. The speed of the winding motor and the retraction rate of the stretching piston are coordinated by the PLC controller to ensure the tightness of the winding. The ratchet at one end of the limiting tube can prevent the limiting tube from rotating under the restriction of the pawl. After the winding is completed, the stretching piston elongates and stretches the fabric sample. In this way, the pressure plate inside the limiting tube only plays a temporary fixing role. By wrapping multiple layers, the contact surface of the force is expanded, the pressure per unit area is reduced, thereby reducing the risk of local indentation or fiber breakage.

[0017] (2) The rotating tensile test structure for washable polyester fabric, through the setting of pressure sensor, due to the limitation of the distance between the fixed frame and the fabric sample, when the stretching piston is extended, the fixed frame and one end of the stretching piston will be squeezed. The pressure sensor can monitor the relative pressure between the fixed frame and one end of the stretching piston in real time and transmit the data to the PLC controller. When the tensile force on the fabric sample exceeds the bearing limit, the fabric sample is torn and the tensile force applied to the fixed frames on both sides will decrease sharply. Due to the friction between the slide rail and the support frame, the pressure sensor monitoring data will approach zero. The PLC controller selects the maximum value of the pressure sensor monitoring data before the sharp decrease and transmits the data to the touch screen to intuitively display the tensile performance of the polyester fabric. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the slide rail installation structure of this utility model;

[0020] Figure 3 This is a schematic diagram of the pressure plate installation structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the ratchet mounting structure of this utility model;

[0022] In the diagram: 1. Base plate; 11. PLC controller; 12. Touch screen; 2. Tensioning mechanism; 21. Slide rail; 22. Support frame; 23. Pressure sensor; 24. Tensioning piston; 3. Fixing mechanism; 31. Stepper motor; 32. Fixing frame; 33. Winding motor; 34. Gear; 35. Limiting tube; 36. Pneumatic piston; 37. Pressure plate; 38. Gear ring; 39. Guide column; 310. Ratchet; 311. Limiting frame; 312. Spring; 313. Pawl; 314. Connecting rod. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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.

[0024] Please see Figure 1-4 This utility model provides a technical solution: a rotating tensile testing structure for washable polyester fabric, comprising a base plate 1, a PLC controller 11 and a touch screen 12 fixedly installed on the top of the base plate 1, a stretching mechanism 2 for stretching the fabric installed on the top of the base plate 1, the stretching mechanism 2 including slide rails 21 fixed on the left and right sides of the base plate 1, a support frame 22 movably installed inside the slide rails 21, a pressure sensor 23 fixedly installed on one side of the support frame 22, a stretching piston 24 fixedly installed at one end of the pressure sensor 23, the support frame 22 and the slide rails 21 forming a sliding connection, the support frame 22 being mirror-symmetrically installed on the front and rear sides of the slide rails 21, and the pressure sensor 23 between the support frame 22 at the front and rear ends of the slide rails 21 being fixedly connected to the stretching piston 24 respectively.

[0025] Specifically, the base plate 1 can provide a fixed mounting for the slide rail 21, thereby limiting the spacing of the slide rail 21 and preventing the support frame 22 from slipping off. The PLC controller 11 can coordinate the working conditions of the stretching piston 24 and the winding motor 33, and adjust the rotation angle of the stepper motor 31. The touch screen 12 can display the detection data. The slide rail 21 can limit the movement direction of the support frame 22. The pressure sensor 23 detects the pressure on both ends of the stretching piston 24 when it is extended. The stretching piston 24 can adjust the spacing of the support frame 22.

[0026] A fixing mechanism 3 for fixing both ends of the fabric sample is installed above the base plate 1. The fixing mechanism 3 includes a stepper motor 31 fixedly installed on one side of the support frame 22. A fixing frame 32 is installed on the fixing rod at the end of the shaft of the stepper motor 31. A winding motor 33 is fixedly installed on one side of the fixing frame 32. A gear 34 is fixedly installed on the outside of the shaft of the winding motor 33. A limit tube 35 is movably installed inside the fixing frame 32. A pneumatic piston 36 is fixedly installed inside the limit tube 35. A pressure plate 37 is fixedly installed at the movable end of the pneumatic piston 36. A gear ring 38 is fixedly installed at the bottom end of the limit tube 35. The fixing mechanism 3 also includes a guide post 39 installed inside the fixing frame 32. A ratchet 310 is fixedly installed at the top end of the limit tube 35. A limit frame 311 is fixedly installed above the fixing frame 32. A spring 312 is fixedly installed inside the limit frame 311. A pawl 313 is fitted below the limit frame 311. A gear 34 is movably installed above the pawl 313. The connecting rod 314, the fixed frame 32, and the support frame 22 are rotatably connected. The winding motor 33 is installed on the left side of the fixed frame 32 behind the slide rail 21 and on the right side of the fixed frame 32 in front of the slide rail 21. The limiting tube 35 is rotatably connected to the fixed frame 32 through a bearing. The center front of the limiting tube 35 is provided with an opening structure. There are four pneumatic pistons 36. The pneumatic pistons 36 are symmetrically installed on the inner wall of the limiting tube 35 with the center of the limiting tube 35 as the reference. The gear ring 38 and the gear 34 mesh with each other. The limiting frame 311 is symmetrically installed on the top of the fixed frame 32 with the center of the limiting tube 35 as the reference. The pawl 313 is slidably connected to the limiting frame 311. The pawl 313 is fixedly connected to the other end of the spring 312 inside the limiting frame 311. The center of the connecting rod 314 is connected by a pin. The two ends of the connecting rod 314 are rotatably connected to the pawls 313 on both sides through pins.

[0027] Specifically, the stepper motor 31 drives the fixing frame 32 to rotate. The front and rear stepper motors 31 rotate in opposite directions, causing the fixing frame 32 to rotate in opposite directions to adjust the torsion angle of the test sample. The fixing frame 32 can limit the position of the limiting tube 35. The winding motor 33 drives the limiting tube 35 to rotate through the gear 34 on the outside of the shaft and the gear ring 38 at one end of the limiting tube 35. The pneumatic piston 36 inside the limiting tube 35 can adjust the spacing of the pressure plates 37 to clamp one end of the fabric. After the two ends of the fabric are fixed, the limiting tube 35 rotates to wind the fabric around the outside of the limiting tube 35. The column 39 restricts the fabric inspection area between the openings of the limiting tube 35 and drives the fabric to rotate when the fixing frame 32 rotates. The pawl 313 is kept engaged with the ratchet 310 under the restriction of the spring 312 and allows the ratchet 310 to rotate clockwise so that the limiting tube 35 can rotate during stretching, causing the fabric to loosen. When the connecting rod 314 is subjected to pressure at the central bend, it will push the pawl 313 to both sides so that the pawl 313 is not engaged with the ratchet 310, so that the sample can be removed after the inspection is completed. At the same time, the contents not described in detail in this specification are all prior art known to those skilled in the art.

[0028] During operation, the pneumatic piston 36 inside the limiting tube 35 can adjust the spacing of the pressure plates 37 to clamp one end of the fabric. Initially, the stretching piston 24 is at its elongation limit. After the fabric is fixed at both ends, the winding motor 33 drives the limiting tube 35 to rotate via the gear 34 on the outside of the winding motor shaft and the gear ring 38 at one end of the limiting tube 35. At the same time, the stretching piston 24 retracts, winding the fabric around the outside of the limiting tube 35. The rotation speed of the winding motor 33 and the retraction rate of the stretching piston 24 are coordinated by the PLC controller 11 to ensure the tightness of the winding. The ratchet 310 at one end of the limiting tube 35 can prevent the limiting tube 35 from rotating under the restriction of the pawl 313. After winding is completed, the stretching piston 24 extends, stretching the fabric sample. In this way, the pressure plates 37 inside the limiting tube 35 only play a temporary fixing role. The force is expanded by multiple layers of wrapping. The contact surface reduces the pressure per unit area, thereby reducing the risk of local indentation or fiber breakage. Since the distance between the fixing frames 32 is limited by the fabric sample, when the stretching piston 24 extends, the fixing frame 32 and one end of the stretching piston 24 will be squeezed. The pressure sensor 23 can monitor the relative pressure between the fixing frame 32 and one end of the stretching piston 24 in real time and transmit the data to the PLC controller 11. When the tensile force on the fabric sample exceeds the bearing limit, the fabric sample is torn, and the tensile force applied to the fixing frames 32 on both sides will decrease sharply. Due to the friction between the slide rail 21 and the support frame 22, the data monitored by the pressure sensor 23 will approach zero. The PLC controller 11 selects the maximum value of the data monitored by the pressure sensor 23 before the sharp decrease and transmits the data to the touch screen 12 to intuitively display the tensile performance of the polyester fabric.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0030] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rotating tensile testing structure for washable polyester fabric, comprising a base plate (1), wherein a PLC controller (11) and a touch screen (12) are fixedly mounted on the top of the base plate (1), characterized in that: A stretching mechanism (2) for stretching the fabric and a fixing mechanism (3) for fixing the two ends of the fabric sample are installed above the base plate (1). The stretching mechanism (2) includes slide rails (21) fixed on the left and right sides of the base plate (1). A support frame (22) is movably installed inside the slide rail (21). A pressure sensor (23) is fixedly installed on one side of the support frame (22). A stretching piston (24) is fixedly installed at one end of the pressure sensor (23). The fixing mechanism (3) includes a stepper motor (31) fixedly installed on one side of the support frame (22). A fixing frame (32) is installed on the fixing rod at the end of the shaft of the stepper motor (31). A winding motor (33) is fixedly installed on one side of the fixing frame (32). A gear (34) is fixedly installed on the outside of the shaft of the winding motor (33). A limit tube (35) is movably installed inside the fixing frame (32). A pneumatic piston (36) is fixedly installed inside the limit tube (35). A pressure plate (37) is fixedly installed at the movable end of the pneumatic piston (36). A toothed ring (38) is fixedly installed at the bottom end of the limit tube (35).

2. The rotating tensile strength test structure for washable polyester fabric according to claim 1, characterized in that: The fixing mechanism (3) also includes a guide post (39) installed inside the fixing frame (32), a ratchet (310) is fixedly installed at the top of the limiting tube (35), a limiting frame (311) is fixedly installed above the fixing frame (32), a spring (312) is fixedly installed inside the limiting frame (311), a pawl (313) is fitted below the limiting frame (311), and a connecting rod (314) is movably installed above the pawl (313).

3. The rotating tensile test structure for washable polyester fabric according to claim 1, characterized in that: The support frame (22) and the slide rail (21) are connected in a sliding connection. The support frame (22) is installed symmetrically on the front and rear sides of the slide rail (21), and the pressure sensor (23) between the support frame (22) at the front and rear ends of the slide rail (21) is fixedly connected to the tension piston (24).

4. The rotating tensile test structure for washable polyester fabric according to claim 1, characterized in that: The fixed frame (32) and the support frame (22) are rotatably connected. The winding motor (33) is installed on the left side of the fixed frame (32) behind the slide rail (21) and the right side of the fixed frame (32) in front of the slide rail (21).

5. The rotating tensile test structure for washable polyester fabric according to claim 1, characterized in that: The limiting tube (35) is rotatably connected to the fixing frame (32) through the bearing. The limiting tube (35) has an opening structure on the front side of the center. There are four pneumatic pistons (36). The pneumatic pistons (36) are symmetrically installed on the inner wall of the limiting tube (35) with the center of the limiting tube (35) as the reference. The gear ring (38) and the gear (34) mesh with each other.

6. The rotating tensile test structure for washable polyester fabric according to claim 2, characterized in that: The limiting frame (311) is mirror-symmetrically mounted on the top of the fixed frame (32) with the center of the limiting tube (35) as the reference. The pawl (313) is slidably connected to the limiting frame (311), and the pawl (313) is fixedly connected to the other end of the spring (312) inside the limiting frame (311). The center of the connecting rod (314) is connected by a pin, and the two ends of the connecting rod (314) are rotatably connected to the two pawls (313) on both sides by pins.

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