A wire pipe threading tension testing machine and a testing method thereof

Abstract

The application discloses a wire pipe threading tension testing machine and a testing method thereof. The tension testing machine comprises a device rack, a host display, a guide wheel support, a guide wheel and a pulling line mechanism. The pulling line mechanism is arranged on a sliding base. The sliding base is arranged on a base sliding rail through base sliding blocks at the bottom. The base sliding rail is fixedly arranged on a device platform. A tension sensor is fixedly arranged at the end of the sliding base. The tension sensor is fixed on the device platform through an angle base. The tension sensor is electrically connected with the host display. The pulling line mechanism is used for pulling the electric wire. When the electric wire is pulled, the tension value is measured by the tension sensor and displayed on the host display. According to the technical scheme, the electric wire can be automatically pulled and the tension value information in the pulling process can be recorded. The operation is convenient. The testing machine is movable, can be adapted to different pipe arrangement simulation scenes and has high universality.

Description

Technical Field

[0001] This invention belongs to the technical field of conduit threading testing equipment, specifically relating to a conduit threading tensile testing machine and its testing method used to evaluate the difficulty of threading during conduit threading construction. Background Technology

[0002] Traditional conduit installation often encounters problems during the wire pulling process, such as difficulty in pulling the wires, or even tearing the conduit, resulting in slow construction efficiency and wasted time and labor. Therefore, conduit manufacturers need to improve their processes and formulations, while market applications require upgrades to wiring techniques to solve the wire pulling problem. However, both formulation improvements and wiring technique upgrades only demonstrate sensory improvements, lacking data validity and scientific rigor. Currently, there is no relevant testing technology or equipment. Therefore, designing a conduit wire pulling tensile strength tester is of significant practical importance. It can be used to test the friction between different specifications of conduit and wires under different wiring techniques, providing real and effective data for conduit formulation improvements and wiring technique upgrades, thereby driving product improvement and process upgrades. Summary of the Invention

[0003] To address the aforementioned problems, this invention provides a conduit threading tensile testing machine and its testing method, solving the technical problem that traditional threading tensile testing methods cannot accurately and effectively obtain test data.

[0004] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0005] A wire pulling tensile testing machine includes a frame, a main display, a guide wheel bracket, guide wheels, and a wire pulling mechanism. The wire pulling mechanism is mounted on a sliding base, which is mounted on a base slide rail via a bottom slider. The base slide rail is fixedly mounted on a platform. A tensile sensor is fixedly mounted at the end of the sliding base and is fixed to the platform via a corner bracket. The tensile sensor is electrically connected to the main display. The wire pulling mechanism is used to pull the wire. During wire pulling, the tensile force value is measured by the tensile sensor and displayed on the main display.

[0006] Furthermore, the guide wheels are mounted on the guide wheel bracket, which is fixed to the equipment frame. There are two guide wheels used to guide the conduit. Rollers are provided below the equipment frame to enable the tensile testing machine to move.

[0007] Furthermore, the cable pulling mechanism includes a cable guide thrust seat, a first roller, a second roller, and a third roller. The second and third rollers are arranged side by side to form a rear double roller assembly. The cable guide thrust seat, the first roller, and the rear double roller assembly are sequentially arranged on a sliding base. The cable guide thrust seat is located at the front end of the sliding base. The first roller and the rear double roller assembly are both fixed to the sliding base by roller support seats. The first roller is connected to a motor, and the first roller and the second roller are connected by a pulley to transmit power.

[0008] Furthermore, a support spring is provided below the third roller. The elastic force of the support spring causes the second and third rollers to come into contact and exert a certain pressure. The roller shaft of the third roller is also connected to a separation handle for separating the second and third rollers to pass through the wire.

[0009] Preferably, the first roller is provided with a first branch post and a second branch post on its front and rear sides to prevent the wire from getting tangled during rotation.

[0010] Preferably, the diameter of the first roller is larger than the diameter of the second roller, and when rotating, the linear velocity of the second roller is higher than that of the first roller, which is used to tighten the wire.

[0011] Preferably, the first roller, the second roller, and the third roller are all provided with knurled textures to improve friction.

[0012] Furthermore, when the wire pulling mechanism pulls the wire, the wire is wound around the first roller several times and then enters between the second and third rollers, where the pressure between the second and third rollers tightens the wire.

[0013] Furthermore, the tensile testing machine is also equipped with a printer for storing test data.

[0014] The present invention also proposes a testing method for the above-mentioned conduit threading tensile testing machine, comprising the following steps:

[0015] (1) Move the tensile testing machine to the end of the scene pipeline, extend the pipeline, and make the end of the pipeline lock into the pipeline guide thrust seat;

[0016] (2) Pull out the wires from the conduit. If multiple wires are pulled at the same time, a lead wire needs to be connected in front of the wires. The reserved length of the wires or lead wires should be at least 60cm.

[0017] (3) Wrap the wire around the first roller 1-3 times, lift the release handle upwards to compress the support spring, separate the third roller from the second roller, pass the wire through the gap, pull the wire tight, and then lower the release handle to press the wire.

[0018] (4) Start the motor. The first roller and the second roller rotate synchronously through the pulley. The linear speed of the second roller is slightly greater than that of the first roller. The wires in the second roller and the third roller move forward with the rotation of the rollers, tightening the wires. Then the first roller pulls the wires by rotating.

[0019] (5) The reaction force is transmitted from the sliding base to the tension sensor, and the corresponding data is finally processed by the computer. The relevant data can be displayed on the host screen or printed.

[0020] The friction between the conduit and the wire determines the conduit length and the number of joints during wiring, thus affecting the effort required for installation. To test this friction and evaluate the coefficient of friction of the conduit's inner wall, this patent provides a conduit wiring tensile testing machine. This invention automatically pulls the wire and records the force during the pulling process, offering convenient operation. Furthermore, the testing machine is portable, adaptable to different conduit layout simulation scenarios, and highly versatile, providing effective data support for improving conduit formulations or upgrading wiring processes to solve wiring problems. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the conduit threading tensile testing machine of the present invention;

[0022] Figure 2 This is a schematic diagram of the wire pulling mechanism and platform structure of the present invention;

[0023] Figure 3 This is a top view of the wire pulling mechanism and platform of the present invention;

[0024] Figure 4 This is a schematic diagram of the roller's external structure according to the present invention;

[0025] In the diagram: 1. Equipment frame; 2. Main unit display; 3. Guide wheel bracket; 4. Guide wheel; 5. Cable pulling mechanism; 6. Sliding base; 7. Base slider; 8. Base slide rail; 9. Tension sensor; 10. Angle seat; 11. Wire; 12. Conduit; 13. Roller; 14. Conduit guide thrust seat; 15. First roller; 16. Second roller; 17. Third roller; 18. Roller support seat; 19. Motor; 20. Pulley; 21. Support spring; 22. Separation handle; 23. First branching post; 24. Second branching post; 25. Roller texture; 26. Printer. Detailed Implementation

[0026] The technical solution of the present invention will be clearly and completely described below through embodiments. 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 of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] like Figure 1-4 As shown, a conduit tension testing machine includes a frame 1, a main display 2, a guide wheel bracket 3, guide wheels 4, and a pulling mechanism 5. The guide wheels 4 are mounted on the guide wheel bracket 3, which is fixed to the frame 1. There are two guide wheels 4, used to guide the conduit 12. The pulling mechanism 5 is mounted on a sliding base 6, which is mounted on a base slide rail 8 via a base slider 7 at its bottom. The base slide rail 8 is fixed to the equipment platform. A tension sensor 9 is fixedly mounted at the end of the sliding base 6, and is fixed to the equipment platform via a corner bracket 10. The tension sensor 9 is electrically connected to the main display 2. The pulling mechanism 5 is used to pull the wire 11. During pulling, the tension sensor 9 measures the tension value and displays it on the main display 2.

[0028] The equipment frame 1 is equipped with casters 13 at the bottom to enable the tensile testing machine to be moved, making it suitable for various testing scenarios and pipeline layouts.

[0029] The wire pulling mechanism 5 of the present invention includes a wire guide thrust seat 14, a first roller 15, a second roller 16, and a third roller 17. The second roller 16 and the third roller 17 are arranged side by side to form a rear double roller assembly. The wire guide thrust seat 14, the first roller 15, and the rear double roller assembly are sequentially arranged on a sliding base 6. The wire guide thrust seat 14 is located at the front end of the sliding base 6. The first roller 15 and the rear double roller assembly are both fixed to the sliding base 6 by roller support seats 18. The first roller 15 is connected to a motor 19, and the first roller 15 and the second roller 16 are connected by a pulley 20 to transmit power. The diameter of the first roller 15 is larger than the diameter of the second roller 16. When rotating, the linear speed of the second roller 16 is higher than that of the first roller 15, which is used to tighten the wire.

[0030] A support spring 21 is provided below the third roller 17. The elastic force of the support spring 21 causes the second roller 16 and the third roller 17 to come into contact and exert a certain pressure. The roller shaft of the third roller 17 is also connected to a separation handle 22, which is used to separate the second roller 16 and the third roller 17 to pass through the wire.

[0031] To increase friction, the outer surfaces of the first roller 15, the second roller 16, and the third roller 17 are all provided with knurled textures 25 to improve friction.

[0032] When the wire pulling mechanism 5 pulls the wire, the wire 11 is wound around the first roller 15 several times and then enters between the second roller 16 and the third roller 17. The wire is tightened by the pressure between the second roller 16 and the third roller 17.

[0033] The tensile testing machine is also equipped with a printer 26 for storing test data. The force value information of the conduit 12 during the threading process is measured by the tensile sensor 9, and the force value curve is generated on the host display 2. If necessary, the data can be printed and stored by the printer 26.

[0034] When the wire-pulling mechanism of the present invention is working:

[0035] ① The foremost part of the cable pulling mechanism 5 is a cable guide thrust seat 14, which has both guiding and thrust-stopping functions. Guiding function: ensures that the wire 11 and the cable pulling mechanism 5 are on the same axis during cable pulling, preventing the formation of an angle that increases friction; Thrusting function: prevents the cable tube 12 from moving with the cable pulling direction during cable pulling, and fixes the cable tube 12.

[0036] ② The cable pulling mechanism 5 has two sets of rollers. The first set is the first roller 15, a single roller design. The wire 11 is wound around the first roller 15 and driven by the motor 19. The wire 11 is pulled by rotation. The first branch post 23 and the second branch post 24 are set on the front and rear sides of the first roller 15 to prevent the wire from getting tangled during rotation. The second set is a combination of the second roller 16 and the third roller 17, a double roller design. It delivers and tightens the wire, increasing the friction between the single roller and the wire. The upper second roller 16 is fixed on its shaft, while the lower third roller 17 is supported by the support spring 21. The elastic force keeps the upper and lower rollers in contact and exerts a certain pressure. The separation handle 22 in front of the third roller 17 is used to separate the upper and lower rollers. The support spring 21 is compressed by the lever principle, and the wire is passed through the gap between the rollers before pulling the cable.

[0037] ③ The first group of single rollers and the second roller 16 above the second group are connected and driven by a pulley 20. The linear speed of the second roller 16 is slightly higher than that of the single roller, which helps to tighten the wire and ensure sufficient friction between the wire wound on the single roller and the roller. At the same time, to increase the friction, the wire can be wound multiple times at the single roller.

[0038] ④ At the very end is the tension sensor 9, which is fixed to the sliding base 6 and to the platform via the corner bracket 10. When the wire is pulled, the reaction force is first transmitted to the sliding base 6. The sliding base 6 is fixed to the equipment platform via the base slide rail 8 and has a horizontal degree of freedom, which can transmit the force to the tension sensor 9 to measure the tension value.

[0039] This invention designs a conduit threading tensile testing machine, which automatically pulls the wire using a motor and records the force value. It includes a main unit display and a printer for data storage. The usage steps are as follows:

[0040] (1) Move the test machine to the end of the scene pipeline, extend the pipeline, and make the end position of the pipeline fit into the guide thrust seat.

[0041] (2) Pull the wires out of the conduit. If multiple wires are to be pulled at the same time, a lead wire needs to be connected in front of the wires. The reserved length of the wires or lead wires should be at least 60cm.

[0042] (3) Wrap the wire around the single roller 1-3 times, lift the release handle upward to compress the spring, separate the lower roller from the upper roller, pass the lead wire through the gap, pull the wire tight, and then lower the release handle to press the wire.

[0043] (4) Start the motor. The two sets of rollers rotate synchronously through the pulleys. The linear speed of the double rollers is slightly greater than that of the single roller. The wire in the double rollers moves forward with the rotation of the rollers, tightening the wire. Then the single roller pulls the wire by rotating.

[0044] (5) The reaction force is transmitted from the sliding base to the tension sensor, and the corresponding data is finally processed by the computer. The relevant data can be displayed on the screen or printed.

Claims

1. A conduit threading tensile testing machine, characterized in that, The device includes a frame (1), a host display (2), a guide wheel bracket (3), a guide wheel (4), and a wire pulling mechanism (5). The wire pulling mechanism (5) is mounted on a sliding base (6). The sliding base (6) is mounted on a base slide rail (8) via a base slider (7) at the bottom. The base slide rail (8) is fixedly mounted on the device platform. A tension sensor (9) is fixedly mounted at the end of the sliding base (6). The tension sensor (9) is fixed on the device platform via a corner bracket (10). The tension sensor (9) is electrically connected to the host display (2). The wire pulling mechanism (5) is used to pull the wire (11). When pulling the wire, the tension value is measured by the tension sensor (9) and displayed on the host display (2). The cable pulling mechanism (5) includes a cable guide thrust seat (14), a first roller (15), a second roller (16), and a third roller (17). The second roller (16) and the third roller (17) are arranged side by side to form a rear double roller assembly. The cable guide thrust seat (14), the first roller (15), and the rear double roller assembly are arranged sequentially on the sliding base (6). The cable guide thrust seat (14) is located at the front end of the sliding base (6). The first roller (15) and the rear double roller assembly are both fixed on the sliding base (6) by roller support seats (18). The first roller (15) is connected to the motor (19). The first roller (15) and the second roller (16) are connected by a pulley (20) to transmit power.

2. The conduit threading tensile testing machine according to claim 1, characterized in that, The guide wheel (4) is set on the guide wheel bracket (3), and the guide wheel bracket (3) is fixed on the equipment frame (1). There are two guide wheels (4) for guiding the conduit (12). Rollers (13) are set below the equipment frame (1) to enable the tensile testing machine to move.

3. The conduit threading tensile testing machine according to claim 1, characterized in that, A support spring (21) is provided below the third roller (17). The elastic force of the support spring (21) causes the second roller (16) and the third roller (17) to come into contact and have a certain pressure. The roller shaft of the third roller (17) is also connected to a separation handle (22) for separating the second roller (16) and the third roller (17) to pass through the wire (11).

4. The conduit threading tensile testing machine according to claim 3, characterized in that, The first roller (15) is provided with a first branch post (23) and a second branch post (24) on its front and rear sides to prevent the wire (11) from getting tangled during rotation.

5. A conduit threading tensile testing machine according to claim 3, characterized in that, The diameter of the first roller (15) is larger than the diameter of the second roller (16). When rotating, the linear velocity of the second roller (16) is higher than that of the first roller (15), which is used to tighten the wire.

6. The conduit threading tensile testing machine according to claim 3, characterized in that, The first roller (15), the second roller (16) and the third roller (17) are all provided with knurling (25) to improve friction.

7. A conduit threading tensile testing machine according to claim 4, characterized in that, When the wire pulling mechanism (5) pulls the wire, the wire (11) is wound around the first roller (15) several times and then enters between the second roller (16) and the third roller (17). The wire is tightened by the pressure between the second roller (16) and the third roller (17).

8. A conduit threading tensile testing machine according to claim 1, characterized in that, The tensile testing machine is also equipped with a printer (26) for storing test data.

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