A testing device for the strength of nylon threads

Abstract

The present invention discloses a device for testing the strength of nylon threads, which relates to the technical field of nylon thread strength testing, and includes: a monitoring table, a fixing frame is fixedly installed on the top of the monitoring table, a motor is fixedly installed on the surface of the monitoring table, and a bidirectional screw rod is fixedly installed at the output end of the motor; a strength testing device, the strength testing device is arranged on the monitoring table, and the strength testing device includes a linear motor, a driving device, a testing device, a spiral plate, a fixing rod, a square plate, a placing plate, a hollow table, a sliding rod, a toothed plate, a rotating block, a turning handle and a clamping groove. By placing the nylon thread between the toothed plates and then pushing the turning handle downward, the downward movement of the turning handle will drive the rotating block to move downward, the downward movement of the rotating block will drive the sliding rod to move downward, the downward movement of the sliding rod will drive the toothed plate to move downward, and the downward movement of the toothed plate will clamp the nylon thread to prevent it from suddenly loosening during pulling, resulting in affecting the detection effect.

Description

Technical Field

[0001] The present invention relates to the technical field of nylon thread strength testing, and specifically to a nylon thread strength testing device. Background Technique

[0002] A nylon thread strength testing device is a device used to measure and evaluate the tensile strength, ductility and other properties of nylon fiber wires during the stretching process. This device is usually used in the textile industry, materials science experiments, quality control and other occasions to ensure that products meet relevant standards and requirements.

[0003] The patent with the patent announcement number CN218239598U relates to a nylon thread strength testing device, including a bottom plate. Two side plates are slidably connected to the top of the bottom plate. An adjusting mechanism for adjusting the movement of the two side plates is provided on the bottom plate. Fixing mechanisms are provided on the outer side walls of the opposite ends of the two side plates. An installation plate is fixedly connected to the top of the bottom plate. Two symmetrically arranged installation blocks are fixedly connected to the outer side wall of the installation plate. A fixing rod is fixedly connected between the two installation blocks. A testing mechanism is provided on the fixing rod. Through the settings of the side plates, U-shaped plates and connecting rods, the nylon thread is convenient to be fixed on the device. Through the cooperation of the spring and the guide rod, the fixed nylon thread is stretched to keep the nylon thread in a straight state. Through the settings of the electric push rod, the moving plate and the testing block, the device is convenient to perform extrusion tests on different positions of the nylon thread, so as to fully test the strength of the nylon thread and is convenient to use.

[0004] In the above patent, through the settings of the electric push rod, the moving plate and the testing block, the device is convenient to perform extrusion tests on different positions of the nylon thread, so as to fully test the strength of the nylon thread and is convenient to use. However, during the process of clamping and pulling the nylon thread, the nylon thread may directly fall off, affecting the monitoring effect of the nylon thread strength. Summary of the Invention

[0005] Aiming at the deficiencies of the prior art, the present invention provides a nylon thread strength testing device, which solves the problems put forward in the above background technique.

[0006] To achieve the above object, the present invention is realized through the following technical solutions: A nylon thread strength testing device, comprising: a monitoring table, a fixing frame is fixedly installed on the top of the monitoring table, a motor is fixedly installed on the surface of the monitoring table, and a bidirectional screw is fixedly installed at the output end of the motor; a strength testing device, the strength testing device is arranged on the monitoring table, and the strength testing device includes a linear motor, a driving device, a testing device, a spiral plate, a fixing rod, a square plate, a placing plate, a hollow table, a sliding rod, a toothed plate, a rotating block, a turning handle and a card slot. By placing the nylon thread between the toothed plates and then pushing the turning handle downward, the downward movement of the turning handle will drive the rotating block to move downward, and the downward movement of the rotating block will drive the sliding rod to move downward. The linear motor is fixedly installed on one side of the fixing frame close to the motor, the driving device is fixedly installed at the output end of the linear motor, the testing device is fixedly installed at the output end of the driving device, the spiral plate is spirally installed on the surface of the bidirectional screw, the fixing rod is fixedly installed on the inner wall of the monitoring table, the fixing rod penetrates the surface of the spiral plate, the square plate is fixedly installed on the top of the spiral plate, the placing plate is fixedly installed on the side of the square plate close to the testing device, the hollow table is fixedly installed on the top of the placing plate, the sliding rod is slidably installed on the inner wall of the hollow table, the toothed plate is fixedly installed at the bottom of the sliding rod, the rotating block is rotatably installed on the top of the sliding rod, the turning handle is fixedly installed on the top of the rotating block, and the card slot is fixedly installed on the top of the hollow table. Start the driving device to drive the testing device to move downward. When the testing device moves downward and contacts the nylon thread, the nylon thread is squeezed by the downward movement of the testing device for strength detection.

[0007] According to the above technical solution, the testing device is arranged above the nylon thread, and a first spring is linearly arranged between the sliding rod and the hollow table, and the sliding rod is driven to reset by the first spring.

[0008] According to the above technical solution, a protection device for preventing the nylon thread from breaking and flying is arranged on the square plate, and a correction device is arranged on the protection device. The protection device includes a connecting seat, a rotating plate, a sliding seat, a connecting plate and a protection cover. The opposite movement of the square plates will drive the opposite movement of the connecting seats. The opposite movement of the connecting seats will push the rotating plate to rotate downward. The downward rotation of the rotating plate will drive the sliding seat to move downward. The downward movement of the sliding seat will drive the protection cover to move downward. The connecting seat is fixedly installed on the surface of the square plate, the connecting plate is fixedly installed on the inner wall of the monitoring table, the sliding seat is slidably installed on the surface of the connecting plate, the protection cover is fixedly installed on the top of the sliding seat, one end of the rotating plate is rotatably installed on the inner wall of the connecting seat, and the other end of the rotating plate is rotatably installed on the sliding seat.

[0009] According to the above technical solution, a support frame is fixedly installed on one side of the connecting plate close to the square plate. A pneumatic box is fixedly installed on the top of the support frame. An air jet port is opened on one side of the pneumatic box close to the square plate. A pneumatic plate is slidably installed on the inner wall of the pneumatic box. A short rod is fixedly installed on the pneumatic plate. A push plate is fixedly installed on the top of the short rod. During the downward movement of the protective cover, the push plate will be pushed downward. The downward movement of the push plate will drive the short rod to move downward. The downward movement of the short rod will drive the pneumatic plate to move downward. The downward movement of the pneumatic plate will compress the gas inside the pneumatic box and spray it out through the air jet port.

[0010] According to the above technical solution, a second spring is arranged between the sliding seat and the connecting plate to drive the sliding seat to reset through the second spring. A first torsion spring is arranged between the rotating plate and the connecting seat to drive the rotating plate to reset through the first torsion spring. A third spring is arranged between the pneumatic box and the pneumatic plate to drive the pneumatic plate to reset through the third spring.

[0011] According to the above technical solution, the correction device includes a slide bar, a return spring, a push plate, a trapezoidal block, a pulley frame and a correction plate. The opposite movement of the square plates drives the slide bars to move away from each other. During the process of the slide bars moving away from each other, they will contact the connecting plate, and the reverse force from the connecting plate will cause the slide bars to move away from the connecting plate. The slide bars are slidably installed on the surface of the square plates. The return spring is sleeved on the surface of the slide bars. The push plate is fixedly installed on one side of the slide bar close to the placement plate. The trapezoidal block is fixedly installed on the side of the push plate away from the slide bar. The pulley frame is slidably installed at the bottom of the placement plate. The correction plate is fixedly installed on the top of the pulley frame. A semi-circular groove is opened on the surface of the correction plate.

[0012] According to the above technical solution, a trapezoidal plate is fixedly installed on the surface of the correction plate. A sliding plate is slidably installed on the surface of the correction plate. A support plate is fixedly installed on the top of the sliding plate. When the correction plate moves away from the trapezoidal block, it will drive the trapezoidal plate to move away from the trapezoidal block. The movement of the trapezoidal plate away from the trapezoidal block will push the sliding plate upward. The upward movement of the sliding plate will drive the support plate upward.

[0013] According to the above technical solution, the pulley frame contacts the surface of the trapezoidal block, and the trapezoidal block is used to push the pulley frame and the correction plate to correct the nylon thread. The trapezoidal plate contacts the surface of the sliding plate. A fourth spring is arranged between the correction plate and the sliding plate to drive the sliding plate to reset through the fourth spring.

[0014] The present invention provides a nylon thread strength testing device. It has the following beneficial effects:

[0015] (1) In this invention, when the toothed plate moves downward, it will clamp the nylon thread to prevent it from suddenly loosening during pulling, which may affect the detection effect. When the toothed plate clamps the nylon thread, by turning the handle, the rotation of the handle will drive the rotation of the rotating block, and the rotating block will be stuck into the card slot. The card slot limits the rotating block to prevent it from loosening during pulling and affecting the fixing effect. The testing device moves downward to contact the nylon thread, and the testing device moves downward to squeeze the nylon thread for strength detection. At the same time, the reciprocating movement of the output end of the linear motor drives the reciprocating movement of the driving device, which can perform strength detection on different positions of the nylon thread, improving the detection range and ensuring that the strength of the nylon thread meets the standard.

[0016] (2) In this invention, when the rotating plate rotates downward, it will drive the sliding seat to move downward, and the downward movement of the sliding seat will drive the protective cover to move downward. The protective cover moves downward to cover the nylon thread, preventing the nylon thread from suddenly breaking during the detection process. The broken nylon thread may fly off, posing a certain safety hazard. At the same time, when the air pressure plate moves downward, it will compress the gas inside the air pressure box and spray it out through the jet nozzle. The sprayed gas is used to blow away the impurities adhering to the nylon thread, reducing the heat and friction damage caused by friction. Reducing friction helps to maintain the integrity of the fiber thread and prevent surface wear.

[0017] (3) In this invention, when the pulley frame moves away from the trapezoidal block, it will drive the correction plate to move away from the trapezoidal block. The correction plate moves away from the trapezoidal block to correct the nylon thread, preventing the position of the nylon thread from shifting during the test by the testing device, which may affect the test effect. At the same time, when the trapezoidal plate moves away from the trapezoidal block, it will push the sliding plate upward, and the upward movement of the sliding plate will drive the support plate upward. The support plate moves upward to support the nylon thread and prevent the nylon thread from not being in the semi-circular groove of the correction plate during correction, which may affect the detection effect. Brief Description of the Drawings

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the overall sectional structure of the present invention;

[0020] Figure 3 It is the present invention Figure 2 The enlarged schematic diagram of the structure of part A in the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the strength testing device of the present invention;

[0022] Figure 5 It is a schematic diagram of the sectional structure of the hollow platform of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the protection device of the present invention;

[0024] Figure 7 This is a schematic cross-sectional structure diagram of the square plate of the present invention.

[0025] In the figure: 1, monitoring platform; 2, fixing frame; 3, motor; 4, bidirectional screw; 5, linear motor; 6, driving device; 7, testing equipment; 8, spiral plate; 9, fixing rod; 10, square plate; 11, placing plate; 12, hollow platform; 13, sliding rod; 14, toothed plate; 15, rotating block; 16, turning handle; 161, card slot; 171, connecting seat; 172, rotating plate; 173, sliding seat; 174, connecting plate; 175, protective cover; 176, support frame; 177, air pressure box; 178, air pressure plate; 179, short rod; 1710, pushing plate; 181, sliding rod; 182, return spring; 183, pushing plate; 184, trapezoidal block; 185, pulley frame; 186, correcting plate; 187, trapezoidal plate; 188, sliding plate; 189, supporting plate. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1 - 5, an embodiment of the present invention is: a nylon thread strength testing device, comprising: a monitoring table 1, a fixing frame 2 is fixedly installed on the top of the monitoring table 1, a motor 3 is fixedly installed on the surface of the monitoring table 1, and a bidirectional screw 4 is fixedly installed at the output end of the motor 3; a strength testing device, the strength testing device is arranged on the monitoring table 1, and the strength testing device includes a linear motor 5, a driving device 6, a testing device 7, a spiral plate 8, a fixing rod 9, a square plate 10, a placing plate 11, a hollow table 12, a sliding rod 13, a toothed plate 14, a rotating block 15, a turning handle 16 and a card slot 161. When the sliding rod 13 moves downward, it will drive the toothed plate 14 to move downward. When the toothed plate 14 moves downward, it will clamp the nylon thread to prevent it from suddenly loosening during pulling, resulting in affecting the detection effect. The linear motor 5 is fixedly installed on one side of the fixing frame 2 close to the motor 3, the driving device 6 is fixedly installed at the output end of the linear motor 5, the testing device 7 is fixedly installed at the output end of the driving device 6, the spiral plate 8 is spirally installed on the surface of the bidirectional screw 4, the fixing rod 9 is fixedly installed on the inner wall of the monitoring table 1, the fixing rod 9 penetrates through the surface of the spiral plate 8, the square plate 10 is fixedly installed on the top of the spiral plate 8, the placing plate 11 is fixedly installed on one side of the square plate 10 close to the testing device 7, the hollow table 12 is fixedly installed on the top of the placing plate 11, the sliding rod 13 is slidably installed on the inner wall of the hollow table 12, the toothed plate 14 is fixedly installed at the bottom of the sliding rod 13, the rotating block 15 is rotatably installed on the top of the sliding rod 13, the turning handle 16 is fixedly installed on the top of the rotating block 15, and the card slot 161 is fixedly installed on the top of the hollow table 12. At the same time, the reciprocating movement of the output end of the linear motor 5 drives the reciprocating movement of the driving device 6, which can perform strength detection on different positions of the nylon thread, improve the detection range, and ensure that the strength of the nylon thread meets the standard.

[0028] The testing device 7 is arranged above the nylon thread, and a first spring is linearly arranged between the sliding rod 13 and the hollow table 12 to drive the sliding rod 13 to reset through the first spring.

[0029] During the operation of this embodiment: Place the nylon thread between the toothed plates 14, then push the rotary handle 16 downward. The downward movement of the rotary handle 16 drives the rotating block 15 downward. The downward movement of the rotating block 15 drives the sliding rod 13 downward. The downward movement of the sliding rod 13 drives the toothed plate 14 downward. The downward movement of the toothed plate 14 clamps the nylon thread to prevent it from suddenly loosening during pulling, which may affect the detection effect. When the toothed plate 14 clamps the nylon thread, rotate the rotary handle 16. The rotation of the rotary handle 16 drives the rotating block 15 to rotate. The rotating block 15 rotates and snaps into the card slot 161. The card slot 161 limits the rotating block 15 to prevent it from loosening during pulling and affecting the fixing effect. When the nylon thread is clamped, start the motor 3. The rotation of the motor 3 drives the bidirectional screw 4 to rotate. The rotation of the bidirectional screw 4 drives the spiral plates 8 to move away from each other. The movement of the spiral plates 8 away from each other drives the square plate 10, the placement plate 11, and the hollow platform 12 to move away from each other. The movement of the hollow platform 12 away from each other drives the nylon thread to be straightened, improving the detection efficiency. At the same time, start the driving device 6 to drive the testing device 7 to move downward. The downward movement of the testing device 7 contacts the nylon thread. The downward movement of the testing device 7 squeezes the nylon thread for strength detection. At the same time, the reciprocating movement of the output end of the linear motor 5 drives the driving device 6 to reciprocate, which can perform strength detection on different positions of the nylon thread, increasing the detection range and ensuring that the strength of the nylon thread meets the standard.

[0030] Please refer to Figures 1 - 7 , on the basis of the above embodiment, in another embodiment of the present invention, a protection device for preventing the nylon thread from breaking and flying is provided on the square plate 10. A correction device is provided on the protection device. The protection device includes a connecting seat 171, a rotating plate 172, a sliding seat 173, a connecting plate 174, and a protective cover 175. The connecting seat 171 is fixedly installed on the surface of the square plate 10. The connecting plate 174 is fixedly installed on the inner wall of the monitoring table 1. The sliding seat 173 is slidably installed on the surface of the connecting plate 174. The protective cover 175 is fixedly installed on the top of the sliding seat 173. One end of the rotating plate 172 is rotatably installed in the inner wall of the connecting seat 171, and the other end of the rotating plate 172 is rotatably installed on the sliding seat 173. The nylon thread is covered by the downward movement of the protective cover 175 to prevent the nylon thread from suddenly breaking during the detection process. The broken nylon thread may fly off, posing a certain safety hazard.

[0031] A support frame 176 is fixedly installed on the side of the connecting plate 174 close to the square plate 10. An air pressure box 177 is fixedly installed on the top of the support frame 176. An air jet port is opened on the side of the air pressure box 177 close to the square plate 10. An air pressure plate 178 is slidably installed in the inner wall of the air pressure box 177. The air pressure plate 178 is fixedly installed with a short rod 179. A push plate 1710 is fixedly installed on the top of the short rod 179. The impurities adhering to the nylon thread are blown away by the ejected gas, reducing the heat and frictional damage caused by friction. Reducing friction helps to maintain the integrity of the fiber thread and prevent surface wear.

[0032] A second spring is provided between the sliding seat 173 and the connecting plate 174, and the sliding seat 173 is driven to reset by the second spring. A first torsion spring is provided between the rotating plate 172 and the connecting seat 171, and the rotating plate 172 is driven to reset by the first torsion spring. A third spring is provided between the pneumatic box 177 and the pneumatic plate 178, and the pneumatic plate 178 is driven to reset by the third spring.

[0033] The correction device includes a slide bar 181, a return spring 182, a push plate 183, a trapezoidal block 184, a pulley bracket 185 and a correction plate 186. The slide bar 181 is slidably installed on the surface of the square plate 10. The return spring 182 is sleeved on the surface of the slide bar 181. The push plate 183 is fixedly installed on one side of the slide bar 181 close to the placement plate 11. The trapezoidal block 184 is fixedly installed on the side of the push plate 183 away from the slide bar 181. The pulley bracket 185 is slidably installed at the bottom of the placement plate 11. The correction plate 186 is fixedly installed on the top of the pulley bracket 185. A semi-circular groove is formed on the surface of the correction plate 186. The nylon thread is corrected by moving the correction plate 186 away from the trapezoidal block 184, preventing the position of the nylon thread from shifting during the test of the test equipment 7 and affecting the test effect.

[0034] A trapezoidal plate 187 is fixedly installed on the surface of the correction plate 186. A sliding plate 188 is slidably installed on the surface of the correction plate 186. A support plate 189 is fixedly installed on the top of the sliding plate 188. The nylon thread is supported by moving the support plate 189 upward, and at the same time, it is prevented that the nylon thread is not at the semi-circular groove of the correction plate 186 during correction, affecting the detection effect.

[0035] The pulley bracket 185 is in contact with the surface of the trapezoidal block 184. The nylon thread is corrected by the trapezoidal block 184 pushing the pulley bracket 185 and the correction plate 186. The trapezoidal plate 187 is in contact with the surface of the sliding plate 188. A fourth spring is provided between the correction plate 186 and the sliding plate 188, and the sliding plate 188 is driven to reset by the fourth spring.

[0036] During the operation of this embodiment: when the square plates 10 move away from each other, they will drive the connecting seats 171 to move away from each other. When the connecting seats 171 move away from each other, they will push the rotating plates 172 to rotate downward. When the rotating plates 172 rotate downward, they will drive the sliding seats 173 to move downward. When the sliding seats 173 move downward, they will drive the protective covers 175 to move downward. By moving the protective covers 175 downward, the nylon threads are covered to prevent the nylon threads from suddenly breaking during the detection process. The broken nylon threads may fly off, posing a certain safety hazard. At the same time, when the protective covers 175 move downward, they will push the push plates 1710 downward. When the push plates 1710 move downward, they will drive the short rods 179 downward. When the short rods 179 move downward, they will drive the air pressure plates 178 downward. When the air pressure plates 178 move downward, they will compress the gas inside the air pressure box 177 and spray it out through the jet ports. The sprayed gas is used to blow away the impurities adhering to the nylon threads, reducing the heat and frictional damage caused by friction. Reducing friction helps to maintain the integrity of the fiber threads and prevent surface wear.

[0037] When the square plates 10 move away from each other, they drive the sliding rods 181 to move away from each other. During the process of the sliding rods 181 moving away from each other, they will contact the connecting plates 174. Due to the reverse acting force of the connecting plates 174, the sliding rods 181 will move away from the connecting plates 174. When the sliding rods 181 move away from the connecting plates 174, they will drive the pushing plates 183 to move away from the connecting plates 174. When the pushing plates 183 move away from the connecting plates 174, they will drive the trapezoidal blocks 184 to move away from the connecting plates 174. When the trapezoidal blocks 184 move away from the connecting plates 174, they will push the pulley frames 185 to move away from the trapezoidal blocks 184. When the pulley frames 185 move away from the trapezoidal blocks 184, they will drive the correction plates 186 to move away from the trapezoidal blocks 184. By moving the correction plates 186 away from the trapezoidal blocks 184, the nylon threads are corrected to prevent the position of the nylon threads from shifting during the test of the test equipment 7, which may affect the test effect. At the same time, when the correction plates 186 move away from the trapezoidal blocks 184, they will drive the trapezoidal plates 187 to move away from the trapezoidal blocks 184. When the trapezoidal plates 187 move away from the trapezoidal blocks 184, they will push the sliding plates 188 to move upward. When the sliding plates 188 move upward, they will drive the supporting plates 189 to move upward. By moving the supporting plates 189 upward, the nylon threads are supported, and at the same time, it is prevented that when correcting, the nylon threads are not at the semi-circular grooves of the correction plates 186, which may affect the detection effect.

[0038] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and deformations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A nylon thread strength testing device, characterized in that, Including: A monitoring station (1), on the top of which a fixing frame (2) is fixedly installed, and on the surface of the monitoring station (1), a motor (3) is fixedly installed, and at the output end of the motor (3), a bidirectional screw rod (4) is fixedly installed; A strength testing device, which is arranged on the monitoring station (1). The strength testing device includes a linear motor (5), a driving device (6), a testing device (7), a spiral plate (8), a fixing rod (9), a square plate (10), a placing plate (11), a hollow platform (12), a sliding rod (13), a toothed plate (14), a rotating block (15), a turning handle (16) and a card slot (161). The linear motor (5) is fixedly installed on one side of the fixing frame (2) close to the motor (3), the driving device (6) is fixedly installed at the output end of the linear motor (5), the testing device (7) is fixedly installed at the output end of the driving device (6), the spiral plate (8) is spirally installed on the surface of the bidirectional screw rod (4), the fixing rod (9) is fixedly installed on the inner wall of the monitoring station (1), the fixing rod (9) penetrates through the surface of the spiral plate (8), the square plate (10) is fixedly installed on the top of the spiral plate (8), the placing plate (11) is fixedly installed on one side of the square plate (10) close to the testing device (7), the hollow platform (12) is fixedly installed on the top of the placing plate (11), the sliding rod (13) is slidably installed on the inner wall of the hollow platform (12), the toothed plate (14) is fixedly installed at the bottom of the sliding rod (13), the rotating block (15) is rotatably installed on the top of the sliding rod (13), the turning handle (16) is fixedly installed on the top of the rotating block (15), and the card slot (161) is fixedly installed on the top of the hollow platform (12); Wherein, a protection device for preventing the nylon thread from breaking and flying is arranged on the square plate (10), and a correction device is arranged on the protection device.

2. The nylon thread strength testing device according to claim 1, wherein: The testing device (7) is arranged above the nylon thread, and a first spring is linearly arranged between the sliding rod (13) and the hollow platform (12).

3. The nylon thread strength testing device according to claim 2, characterized in that: The protection device includes a connecting seat (171), a rotating plate (172), a sliding seat (173), a connecting plate (174) and a protection cover (175). The connecting seat (171) is fixedly installed on the surface of the square plate (10), the connecting plate (174) is fixedly installed on the inner wall of the monitoring station (1), the sliding seat (173) is slidably installed on the surface of the connecting plate (174), the protection cover (175) is fixedly installed on the top of the sliding seat (173), one end of the rotating plate (172) is rotatably installed in the inner wall of the connecting seat (171), and the other end of the rotating plate (172) is rotatably installed on the sliding seat (173).

4. The nylon thread strength testing device according to claim 3, wherein: One side of the connecting plate (174) close to the square plate (10) is fixedly installed with a support frame (176). The top of the support frame (176) is fixedly installed with a pneumatic box (177). One side of the pneumatic box (177) close to the square plate (10) is provided with a jet orifice. A pneumatic plate (178) is slidably installed on the inner wall of the pneumatic box (177). The pneumatic plate (178) is fixedly installed with a short rod (179). The top of the short rod (179) is fixedly installed with a push plate (1710).

5. The nylon thread strength testing device according to claim 4, wherein: A second spring is arranged between the sliding seat (173) and the connecting plate (174). A first torsion spring is arranged between the rotating plate (172) and the connecting seat (171). A third spring is arranged between the pneumatic box (177) and the pneumatic plate (178).

6. The nylon thread strength testing device according to claim 5, wherein: The correction device includes a sliding rod (181), a return spring (182), a pushing plate (183), a trapezoidal block (184), a pulley frame (185) and a correction plate (186). The sliding rod (181) is slidably installed on the surface of the square plate (10). The return spring (182) is sleeved on the surface of the sliding rod (181). The pushing plate (183) is fixedly installed on one side of the sliding rod (181) close to the placing plate (11). The trapezoidal block (184) is fixedly installed on the side of the pushing plate (183) away from the sliding rod (181). The pulley frame (185) is slidably installed at the bottom of the placing plate (11). The correction plate (186) is fixedly installed on the top of the pulley frame (185). Semi-circular grooves are formed on the surface of the correction plate (186).

7. An apparatus for testing the strength of nylon threads according to claim 6, characterized in that: A trapezoidal plate (187) is fixedly installed on the surface of the correction plate (186). A sliding plate (188) is slidably installed on the surface of the correction plate (186). A supporting plate (189) is fixedly installed on the top of the sliding plate (188).

8. An apparatus for testing the strength of nylon threads according to claim 7, characterized in that: The pulley frame (185) is in contact with the surface of the trapezoidal block (184). The trapezoidal plate (187) is in contact with the surface of the sliding plate (188). A fourth spring is arranged between the correction plate (186) and the sliding plate (188).

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