A full-scale pipeline horizontal tensile force testing device

Abstract

The application provides a full-size pipeline horizontal tensile force test device, and relates to the technical field of pipeline tensile test. The full-size pipeline horizontal tensile force test device comprises a bottom plate and an experimental pipeline. The top of the bottom plate is provided with a mainframe. One end of the mainframe is fixedly connected with a mounting beam frame. The mounting beam frame is fixedly connected with a servo actuator inside. One end of the servo actuator is fixedly connected with a force sensor. The second moving box and the first moving box are fixedly connected with moving seats on one side. The moving seats are provided with outer wall clamping assemblies and inner wall supporting assemblies inside. The first moving boxes are provided with transmission assemblies inside. The full-size pipeline horizontal tensile force test device is favorable for multi-directional clamping and fixing of the experimental pipeline, improves stability, prevents falling during the tensile test, can adapt to experimental pipelines with different inner diameters and outer diameters, and is convenient for experiments.

Description

Technical Field

[0001] This invention relates to a tensile testing apparatus, specifically a horizontal tensile force testing apparatus for full-size pipes, belonging to the field of pipe tensile testing technology. Background Technology

[0002] Tensile testing machines, also known as universal material testing machines, are suitable for testing various physical and mechanical properties of materials such as plastic sheets, pipes, profiles, plastic films, rubber, wires and cables, steel, and fiberglass, for material development.

[0003] Publication No. CN217211995U discloses a horizontal tensile testing machine that reduces the overall height of the machine body by performing transverse tensile tests on products, thereby improving the stability of the machine body in use, the stability of the machine body in tensile testing of products, and the convenience of transporting the machine body as a whole. The machine includes a first housing, a moving device, a second housing, a drive device, a first fixed plate, multiple sets of first guide columns, a first sliding plate, a fixing device, a first stud, multiple sets of second guide columns, a second fixed plate, and a second sliding plate. The moving device is installed inside the first housing for moving the first housing. The bottom of the second housing is connected to the middle of the top of the first housing. The bottom of the first fixed plate is connected to the right side of the top of the first housing. The left and right ends of the multiple sets of first guide columns are respectively connected to the right side wall of the second housing and the left side wall of the first fixed plate.

[0004] Because experimental pipes come in a variety of specifications and sizes, clamps are needed to fix one end of the pipe during use. However, different types of pipes have different outer diameters, inner diameters, wall thicknesses, and lengths. Existing clamps fix the pipes by having the clamping plates retract inward to hold the outer wall of the pipe. However, because experimental pipes are long and heavy, it is difficult to ensure the stability of the pipe during the experiment by relying solely on the clamping plates. The pipe may loosen during stretching, affecting the experiment. Summary of the Invention

[0005] (a) Technical problems to be solved

[0006] The purpose of this invention is to provide a horizontal tensile testing device for full-size pipes to solve the above-mentioned problems. In the prior art, different types of pipes have different outer diameters, inner diameters, wall thicknesses, and lengths. When existing clamps fix the pipes, they clamp the outer wall of the pipe by contracting the clamping plates inward. However, since the test pipes are long and heavy, it is difficult to ensure the stability of the pipes during the test by relying solely on the clamping plates. This may cause the pipes to loosen during the tensile test, affecting the test results.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, the present invention provides the following technical solution: a horizontal tensile testing device for a full-size pipe, comprising a base plate and a test tube. A main frame is mounted on the top of the base plate. A mounting beam is fixedly connected to one end of the main frame. A servo actuator is fixedly connected inside the mounting beam. A force sensor is fixedly connected to one end of the servo actuator. A first movable box is fixedly connected to the output end of the force sensor. A tail beam is fixedly connected to the other end of the base plate. A cover plate is fixedly connected to the top of the tail beam. A support plate is mounted on one side of the cover plate. The support plate is slidably connected inside the main frame. A second movable box is fixedly connected to the bottom of the support plate. Movable seats are fixedly connected to one side of both the second and first movable boxes. An outer wall clamping assembly and an inner wall support assembly are mounted inside each of the two movable seats. The test tube is positioned between the two outer wall clamping assemblies and the two inner wall support assemblies. A transmission assembly is mounted inside each of the two first movable boxes. The outer wall clamping assembly and the inner wall support assembly are connected through the transmission assembly.

[0009] Preferably, the inner wall support assembly includes a displacement mechanism and multiple lifting mechanisms. The displacement mechanism and multiple lifting mechanisms are arranged in a ring array outside the displacement mechanism, which is beneficial for providing multi-directional support to the inner wall of the experimental tube and improving the stability of the experimental tube.

[0010] Preferably, the displacement mechanism includes a threaded rod, a movable block, and a fixed sleeve. The threaded rod passes through the movable seat and is rotatably connected to it. The fixed sleeve is fitted over the outside of the threaded rod. The movable block is fitted over the outside of the threaded rod and threadedly connected to it, so that the threaded rod drives the movable block to move when it rotates. Limiting plates are fixedly connected to both sides of the movable block. Positioning plates are fixedly connected to both sides of the fixed sleeve. Limiting rods are fixedly connected to one side of each of the two positioning plates. A movable seat is fixedly connected to one end of each of the two limiting rods. The two limiting rods pass through the two first fixed plates and are slidably connected to them, which helps to limit the movement of the movable block and prevent it from rotating.

[0011] Preferably, the lifting mechanism includes a first fixed plate, a first push rod, a second push rod, a fixed sleeve, a second fixed plate, and a support plate. The first fixed plate is fixedly connected to the outside of the moving block. The bottom end of the first push rod is hinged to the first fixed plate, and the bottom end of the second push rod is hinged to the second fixed plate. A rotating rod is provided between the first and second push rods. The rotating rod passes through the top ends of the first and second push rods and is rotatably connected to the first and second push rods. Fixed rods are fixedly connected to both ends of the rotating rod. The top end of the fixed rod is fixedly connected to the support plate. When the moving block moves, it drives multiple first fixed plates to move and drives the bottom ends of multiple first push rods to move, thereby lifting the first and second push rods upward and raising the support plate to support the inner wall of the experimental tube.

[0012] Preferably, the top of the first and second top rods are both fixedly connected to a lower hinge block, and the bottom sides of the support plate are both fixedly connected to an upper hinge block. The top of each of the two lower hinge blocks is hinged to a sliding sleeve, and the inside of each of the two sliding sleeves is slidably connected to a sliding rod. A spring is fixedly connected between the sliding sleeve and the sliding rod, and the top of the sliding rod is hinged to the upper hinge block, which is beneficial for supporting the support plate and improving the stability of the support plate.

[0013] Preferably, the outer wall clamping assembly includes a turntable, multiple sliding plates, multiple clamping plates, and multiple locking plates. The multiple sliding plates are arranged in a circular array inside the movable seat. Each of the multiple sliding plates passes through the outer wall of the movable seat and is slidably connected to the movable seat. Each of the multiple sliding plates has a guide rod fixedly connected to its bottom end. The turntable has multiple sliding grooves inside. The multiple guide rods pass through the multiple sliding grooves and are slidably connected to the multiple sliding grooves, which helps to limit the guide rods, so that the guide rods move along the sliding grooves, thereby driving the sliding plates to move.

[0014] Preferably, the transmission assembly includes a main gear, a rotating shaft, an internal gear ring, an external gear ring, and a rotating frame. The rotating frame is rotatably connected inside the movable seat. The rotating shaft passes through the rotating frame and is rotatably connected to the rotating frame. The main gear is fixedly connected to the outside of the rotating shaft. One end of the rotating shaft is fixedly connected to a threaded rod. Both the internal gear ring and the external gear ring are rotatably connected inside the movable seat.

[0015] Preferably, a first positioning rod is rotatably connected to both ends of one side of the rotating frame, and a planetary gear is fixedly connected to the outer side of each of the two first positioning rods. The two planetary gears are simultaneously meshed with the main gear and the internal gear ring, respectively. Positioning gears are meshed with both sides of the internal gear ring, and the two positioning gears are simultaneously meshed with the external gear ring. A second positioning rod is fixedly connected inside the positioning gear, and the second positioning rod is rotatably connected to the inside of the movable seat. The external gear ring is fixedly connected to the turntable.

[0016] Preferably, the main frame includes two first bearing columns, two second bearing columns, and two third bearing columns. Multiple supports are fixedly connected to the top of the base plate. The two ends of the multiple supports are fixedly connected to the first bearing columns, the second bearing columns, and the third bearing columns, respectively. A crossbeam base is fixedly connected to the bottom of one end of each of the two first bearing columns, and a mounting beam base is fixedly connected to the bottom of one end of each of the two third bearing columns. The mounting beam base and the crossbeam base are both fixedly connected to the base plate, which helps to support the main frame and improve stability.

[0017] Preferably, movable plates are fixedly connected to both sides of the support plate, and transmission boxes are fixedly connected to the bottom of both movable plates. Slide rails are fixedly connected to both sides of the bottom of the main frame. The two transmission boxes are slidably connected to the outside of the two slide rails respectively. A power motor is fixedly connected inside each of the two movable plates. The output ends of the two power motors are connected to the transmission boxes, so that the power motors start and drive the transmission boxes and movable plates to move, thereby driving the support plate to move. This is beneficial for adjusting according to experimental tubes of different lengths and is convenient to use.

[0018] This invention provides a horizontal tensile testing device for full-size pipes, which has the following beneficial effects:

[0019] 1. The horizontal tensile testing device for full-size pipes first places the test pipe inside the main frame, then starts the power motor to drive the transmission box to move, so that the transmission box slides on the outside of the slide rail, and drives the support plate and the second moving box to move. The second moving box drives the moving seat to move and match the length of the test pipe, so that the two outer wall clamping components and the inner wall support components clamp the test pipe. After clamping, the copper drum bolts fix the moving plate and the first bearing column, thereby improving the stability of the moving plate and preventing loosening during the tensile test.

[0020] 2. This horizontal tensile testing device for full-size pipes utilizes a motor installed inside the second moving box, with the motor output fixedly connected to the rotating frame. The motor's start drives the rotating frame to rotate, causing the two first positioning rods to rotate in a circle, and simultaneously causing the two planetary gears to rotate in a circle. This, in turn, causes the two planetary gears to drive the main gear and internal gear ring to rotate in the same direction. The rotation of the main gear drives the rotating shaft to rotate, which in turn drives the threaded rod to rotate. The rotating rod, in turn, drives the moving block to move, which in turn drives the lifting assembly to move. This causes the first lifting rod to push one end of the second lifting rod outwards, and pushes the rotating rod and fixed rod to move. The fixed rod then causes multiple support plates to open outwards, supporting the inner wall of the test tube. Springs support the sliding rod, causing it to slide outwards and push the support plates to remain in contact with the inner wall of the test tube, thus improving the support effect.

[0021] 3. This horizontal tensile testing device for full-size pipes, after supporting the inner wall of the test pipe with a support plate, limits the support plate, preventing the threaded rod from continuing to rotate. This limits the threaded rod to the rotating shaft and the main gear. At this time, the rotating frame continues to rotate, driving the first positioning rod and the planetary gear to continue to rotate in a circle. The main gear remains stationary, while the planetary gear rotates under the limitation of the main gear, causing the planetary gear to drive the internal gear ring to continue rotating. This causes the internal gear ring to drive the two positioning gears to rotate, and the positioning gears drive the external gear ring to rotate, thereby driving the turntable to rotate. When the turntable rotates, multiple sliding grooves limit multiple guide rods, and multiple guide rods slide along the sliding grooves. At the same time, the sliding plate passes through the moving seat and is slidably connected to the moving seat, causing the guide rods to drive multiple sliding plates to slide along the moving seat. When the sliding plates move, they drive multiple clamping plates and locking plates to move, causing multiple locking plates to retract and clamp the outer wall of the test pipe. This facilitates multi-directional clamping and fixing of the test pipe, improves stability, and prevents it from falling off during the tensile test. Conversely, if the outer wall clamping assembly clamps the experimental tube first, and the rotating frame continues to rotate, it will cause the inner wall clamping assembly to continue to open, thus accommodating experimental tubes with different inner and outer diameters, which is convenient for experiments. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 This is a schematic diagram of the side structure of the present invention;

[0024] Figure 3 This is a schematic diagram of the structure of the support of the present invention;

[0025] Figure 4 This is a schematic diagram of the structure of the movable base of the present invention.

[0026] Figure 5 This is a schematic diagram of the inner wall support structure of the present invention;

[0027] Figure 6 For the present invention Figure 5 Enlarged view of the A-section structure;

[0028] Figure 7 This is a schematic diagram of the structure of the sliding sleeve of the present invention;

[0029] Figure 8 This is a schematic diagram of the internal structure of the movable base of the present invention;

[0030] Figure 9 This is a schematic diagram of the transmission component of the present invention;

[0031] Figure 10 This is a schematic diagram of the external gear ring of the present invention;

[0032] Figure 11 This is a schematic diagram of the structure of the turntable of the present invention;

[0033] Figure 12 This is a schematic diagram of the support plate of the present invention;

[0034] Figure 13 This is a schematic diagram of the structure of the first push rod and the second push rod of the present invention;

[0035] Figure 14 This is a schematic diagram of the rotating rod of the present invention;

[0036] Figure 15 This is a schematic diagram of the end flange structure of the experimental tube of the present invention.

[0037] In the diagram: 1. Base plate; 2. First load-bearing column; 3. Second load-bearing column; 4. Third load-bearing column; 5. Mounting beam base; 6. Crossbeam base; 7. Mounting beam frame; 8. Servo actuator; 9. Force sensor; 10. First moving box; 11. Tail crossbeam; 12. Cover plate; 13. Support plate; 14. Second moving box; 15. Moving seat; 16. Experimental tube; 17. Threaded rod; 18. Moving block; 19. First fixing plate; 20. First top rod; 21. Second top rod; 22. Fixing sleeve; 23. Positioning plate; 24. Limiting rod; 25. Limiting plate; 26. Support plate; 27. Rotating rod; 28. Fixed rod; 29. ​​Second fixed plate; 30. Lower hinge block; 31. Sliding sleeve; 32. Sliding rod; 33. Spring; 34. Upper hinge block; 35. Turntable; 36. Slide plate; 37. Clamping plate; 38. Clamping plate; 39. Guide rod; 40. Slide groove; 41. Main gear; 42. Rotating shaft; 43. Internal gear ring; 44. External gear ring; 45. First positioning rod; 46. Planetary gear; 47. Second positioning rod; 48. Positioning gear; 49. Rotating frame; 50. Moving plate; 51. Power motor; 52. Transmission box; 53. Slide rail; 54. Support. Detailed Implementation

[0038] This invention provides a horizontal tensile force testing device for full-size pipes.

[0039] Please see Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 , Figure 14 and Figure 15The system includes a base plate 1 and an experimental tube 16. A main frame is mounted on the top of the base plate 1. The main frame includes two first bearing columns 2, two second bearing columns 3, and two third bearing columns 4. Multiple supports 54 are fixedly connected to the top of the base plate 1. The two ends of the multiple supports 54 are fixedly connected to the first bearing columns 2, the second bearing columns 3, and the third bearing columns 4, respectively. A crossbeam base 6 is fixedly connected to the bottom of one end of each of the two first bearing columns 2. A mounting beam base 5 is fixedly connected to the bottom of one end of each of the two third bearing columns 4. The mounting beam base 5 and the crossbeam base 6 are both fixedly connected to the base plate 1, which helps to support the main frame and improve stability.

[0040] Movable plates 50 are fixedly connected to both sides of the support plate 13. Transmission boxes 52 are fixedly connected to the bottom of the two movable plates 50. Slide rails 53 are fixedly connected to both sides of the bottom of the main frame. The two transmission boxes 52 are slidably connected to the outside of the two slide rails 53 respectively. Power motors 51 are fixedly connected inside the two movable plates 50. The output ends of the two power motors 51 are connected to the transmission boxes 52, so that the power motors 51 start to drive the transmission boxes 52 and the movable plates 50 to move, thereby driving the support plate 13 to move. This is convenient for adjustment according to the experimental tubes 16 of different lengths and is easy to use.

[0041] A mounting beam 7 is fixedly connected to one end of the main frame. A servo actuator 8 is fixedly connected inside the mounting beam 7. A force sensor 9 is fixedly connected to one end of the servo actuator 8. A first moving box 10 is fixedly connected to the output end of the force sensor 9. A tail beam 11 is fixedly connected to the other end of the base plate 1. A cover plate 12 is fixedly connected to the top of the tail beam 11. A support plate 13 is provided on one side of the cover plate 12. The support plate 13 is slidably connected to the inside of the main frame. A second moving box 14 is fixedly connected to the bottom of the support plate 13. A moving seat 15 is fixedly connected to one side of both the second moving box 14 and the first moving box 10. An outer wall clamping assembly and an inner wall support assembly are provided inside both moving seats 15. An experimental tube 16 is located between the two outer wall clamping assemblies and the inner wall support assemblies. A transmission assembly is provided inside both first moving boxes 10. The outer wall clamping assembly and the inner wall support assembly are connected through the transmission assembly.

[0042] Specifically, the experimental tube 16 is first placed inside the main frame, and the power motor 51 is started to drive the transmission box 52 to move, so that the transmission box 52 slides on the outside of the slide rail 53, and drives the support plate 13 and the second moving box 14 to move. The second moving box 14 drives the moving seat 15 to move and match the length of the experimental tube 16, so that the two outer wall clamping components and the inner wall support components clamp the experimental tube 16. After clamping, the copper drum bolts fix the moving plate 50 and the first bearing column 2, thereby improving the stability of the moving plate 50 and preventing it from loosening during the tensile test.

[0043] The servo actuator 8 is a device that generates force and displacement in the electro-hydraulic servo system and is one of the key components of the system. The actuator's design ensures high-frequency response and optimal dynamic performance under rated load. This actuator is a single-rod, axially loaded linear actuator, with a basic structure of a single-cylinder, dual-chamber design. In the electro-hydraulic servo system, the actuator works as follows: the pressure oil supplied by the hydraulic source passes through the servo valve and is connected to the two oil chambers of the servo actuator 8 via the two outlets of the servo valve. Different hydraulic pressures are obtained based on the pressure difference between the two chambers. These hydraulic pressures act on one end of the piston, pushing it to move. When the piston contacts the outside, it generates a force that pulls the first moving box 10, causing the moving seat 15 to stretch the experimental tube 16.

[0044] The electro-hydraulic servo system is a closed-loop control system integrating mechanics and electronics. The system uses a servo valve as the electro-hydraulic conversion device. The servo valve controls the servo actuator 8 according to the signal from the servo controller. The magnitude of the input signal current is proportional to the output hydraulic flow rate, and the polarity of the control signal determines the movement of the piston of the servo actuator 8 and the direction of the force.

[0045] The output end of the servo actuator 8 is equipped with a telescopic displacement sensor to accurately measure the displacement of the piston. It is coaxially mounted with the piston rod of the servo actuator 8 and is used to measure the amount of displacement during stretching.

[0046] Force sensor 9 adopts a spoke-type high-rigidity sensor, which has high resistance to lateral forces, high accuracy, can be used for both dynamic and static applications, good tension and compression consistency, overall sealing, stable and reliable performance, low height, good resistance to lateral forces, low output sensitivity, good rigidity, and long life. It can sense tension at any time.

[0047] Please refer to it again. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Figure 9 , Figure 10 , Figure 11 , Figure 12 , Figure 13 and Figure 14The transmission assembly includes a main gear 41, a rotating shaft 42, an internal gear ring 43, an external gear ring 44, and a rotating frame 49. The rotating frame 49 is rotatably connected to the inside of the movable seat 15. The rotating shaft 42 passes through the rotating frame 49 and is rotatably connected to it. The main gear 41 is fixedly connected to the outside of the rotating shaft 42. One end of the rotating shaft 42 is fixedly connected to the threaded rod 17. The internal gear ring 43 and the external gear ring 44 are both rotatably connected to the inside of the movable seat 15. Two first positioning rods 45 are rotatably connected to both ends of one side of the rotating frame 49. Planetary gears 46 are fixedly connected to the outside of the two first positioning rods 45. The two planetary gears 46 are simultaneously meshed with the main gear 41 and the internal gear ring 43, respectively. Positioning gears 48 are meshed with both sides of the internal gear ring 43. The two positioning gears 48 are simultaneously meshed with the external gear ring 44. A second positioning rod 47 is fixedly connected inside the positioning gear 48. The second positioning rod 47 is rotatably connected to the inside of the movable seat 15. The external gear ring 44 is fixedly connected to the turntable 35.

[0048] The inner wall support assembly includes a displacement mechanism and multiple lifting mechanisms. The displacement mechanism and multiple lifting mechanisms are arranged in a ring array outside the displacement mechanism, which is beneficial for providing multi-directional support to the inner wall of the experimental tube 16 and improving the stability of the experimental tube 16.

[0049] The displacement mechanism includes a threaded rod 17, a moving block 18, and a fixed sleeve 22. The threaded rod 17 passes through the moving seat 15 and is rotatably connected to the moving seat 15. The fixed sleeve 22 is sleeved on the outside of the threaded rod 17. The moving block 18 is sleeved on the outside of the threaded rod 17 and is threadedly connected to the threaded rod 17, so that the threaded rod 17 drives the moving block 18 to move when it rotates. Limiting plates 25 are fixedly connected to both sides of the moving block 18. Positioning plates 23 are fixedly connected to both sides of the fixed sleeve 22. Limiting rods 24 are fixedly connected to one side of each of the two positioning plates 23. The moving seat 15 is fixedly connected to one end of each of the two limiting rods 24. The two limiting rods 24 pass through the two first fixed plates 19 respectively and are slidably connected to the first fixed plates 19, which helps to limit the movement of the moving block 18 and prevent the moving block 18 from rotating.

[0050] The lifting mechanism includes a first fixed plate 19, a first push rod 20, a second push rod 21, a fixed sleeve 22, a second fixed plate 29, and a support plate 26. The first fixed plate 19 is fixedly connected to the outside of the moving block 18. The bottom end of the first push rod 20 is hinged to the first fixed plate 19, and the bottom end of the second push rod 21 is hinged to the second fixed plate 29. A rotating rod 27 is provided between the first push rod 20 and the second push rod 21. The rotating rod 27 passes through the top ends of the first push rod 20 and the second push rod 21 and is rotatably connected to the first push rod 20 and the second push rod 21. Fixed rods 28 are fixedly connected to both ends of the rotating rod 27. The top end of the fixed rod 28 is fixedly connected to the support plate 26. When the moving block 18 moves, it drives multiple first fixed plates 19 to move and drives multiple bottom ends of the first push rods 20 to move, thereby lifting the first push rods 20 and the second push rods 21 upward and raising the support plate 26 to support the inner wall of the experimental tube 16.

[0051] The top of the first push rod 20 and the top of the second push rod 21 are both fixedly connected to the lower hinge block 30. The bottom sides of the support plate 26 are both fixedly connected to the upper hinge block 34. The top of the two lower hinge blocks 30 are both hinged to the sliding sleeve 31. The sliding sleeve 31 is slidably connected to the sliding rod 32. The sliding sleeve 31 and the sliding rod 32 are fixedly connected to the spring 33. The top of the sliding rod 32 is hinged to the upper hinge block 34, which helps to support the support plate 26 and improve the stability of the support plate 26.

[0052] Specifically, by installing a motor inside the second movable box 14 and fixing the motor output end to the rotating frame 49, the motor is started to drive the rotating frame 49 to rotate. When the rotating frame 49 rotates, it drives the two first positioning rods 45 to rotate in a circular motion, and also causes the two planetary gears 46 to rotate in a circular motion. At this time, the two planetary gears 46 drive the main gear 41 and the internal gear ring 43 to rotate in the same direction. When the main gear 41 rotates, it drives the rotating shaft 42 to rotate, causing the rotating shaft 42 to drive the threaded rod 17 to rotate. 7. When rotating, the moving block 18 is moved, which in turn moves the lifting assembly. This causes the first lifting rod 20 to push one end of the second lifting rod 21 outward, and pushes the rotating rod 27 and the fixed rod 28 to move. The fixed rod 28 then drives multiple support plates 26 to open outward, allowing the support plates 26 to support the inner wall of the experimental tube 16. The spring 33 also supports the sliding rod 32, causing the sliding rod 32 to slide outward and push the support plates 26 to remain in contact with the inner wall of the experimental tube 16, thus improving the support effect.

[0053] Please refer to it again. Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 , Figure 9 , Figure 10 and Figure 11The outer wall clamping assembly includes a turntable 35, multiple sliding plates 36, multiple clamping plates 37, and multiple locking plates 38. The multiple sliding plates 36 are arranged in a circular array inside the movable seat 15. The multiple sliding plates 36 all penetrate the outer wall of the movable seat 15 and are slidably connected to the movable seat 15. The bottom end of each of the multiple sliding plates 36 is fixedly connected to a guide rod 39. The turntable 35 has multiple sliding grooves 40 inside. The multiple guide rods 39 respectively penetrate the multiple sliding grooves 40 and are slidably connected to the multiple sliding grooves 40, which is beneficial for limiting the guide rods 39, so that the guide rods 39 can move along the sliding grooves 40, thereby driving the sliding plates 36 to move.

[0054] Specifically, after the support plate 26 supports the inner wall of the experimental tube 16, it limits the movement of the threaded rod 17, preventing it from rotating further. This limits the rotation of the shaft 42 and the main gear 41. At this time, the rotating frame 49 continues to rotate, driving the first positioning rod 45 and the planetary gear 46 to continue rotating in a circular motion. The main gear 41 remains stationary, while the planetary gear 46 rotates under the limitation of the main gear 41, causing it to drive the internal gear ring 43 to continue rotating. This, in turn, causes the internal gear ring 43 to drive the two positioning gears 48 to rotate, and the rotation of the positioning gears 48 drives the external gear ring 44 to rotate. The rotating frame 49 moves, causing the turntable 35 to rotate. As the turntable 35 rotates, multiple sliding grooves 40 limit the movement of multiple guide rods 39, causing the guide rods 39 to slide along the sliding grooves 40. Simultaneously, the sliding plate 36 passes through and slides through the movable seat 15, allowing the guide rods 39 to drive the multiple sliding plates 36 to slide along the movable seat 15. As the sliding plates 36 move, they also move multiple clamping plates 37 and locking plates 38, causing the locking plates 38 to retract and clamp the outer wall of the experimental tube 16. This facilitates multi-directional clamping and fixation of the experimental tube 16, improving stability and preventing it from falling off during tensile tests. Conversely, if the outer wall clamping assembly clamps the experimental tube 16 first, and the rotating frame 49 continues to rotate, it causes the inner wall clamping assembly to continue opening, thus accommodating experimental tubes 16 with different inner and outer diameters, facilitating experiments.

[0055] Additionally, the experimental tube 16 can also be connected in other ways, including fixed connections. For example, it can be connected to an external structure or equipment using bolts, or it can be provided with multiple sets of threaded holes and connecting lugs (with threaded holes, welded to the experimental tube 16) and fixed using reinforcing bolts. After fixing, the interior of the experimental tube 16 is sealed. An external equipment pipe connection joint is provided at the pipe, and the connection joint is connected to an external pressure device. At this time, pressure (generally water (liquid) pressure) can be applied to the interior of the experimental tube 16. This can simulate the usage state of the experimental tube 16 under external tension or other combined working conditions when there is pressure inside the experimental tube 16. It should be noted that the external pressure device can generally obtain the pressure data from a data display or instrument, which can facilitate the data obtained under different pressure conditions.

[0056] In addition, for the detection system used in the experiment, a direct pressure sensor can be installed inside the experimental tube 16. The pressure sensor senses the internal water pressure and is equipped with a wireless transmission module to transmit the obtained pressure data to external display and recording devices (display devices are not limited to mobile phones, tablets, computers, smartwatches, etc.). These devices compare the data and record the experimental data and working conditions for each experiment, so that the experimenters can summarize the data. Even better, a monitor for the bending degree of the experimental tube 16 and a data record of the force applied when bending the experimental tube 16 can also be added to facilitate better data comparison and recording. The richer the data, the more accurate the analysis of the experimental data will be, which will help to advance the experiment accurately.

[0057] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of this invention is defined by the appended claims and their equivalents.

Claims

1. A horizontal tensile testing device for a full-size pipe, comprising a base plate (1) and a test tube (16), characterized in that: The base plate (1) is topped with a main frame. One end of the main frame is fixedly connected to a mounting beam (7). A servo actuator (8) is fixedly connected inside the mounting beam (7). One end of the servo actuator (8) is fixedly connected to a force sensor (9). The output end of the force sensor (9) is fixedly connected to a first movable box (10). The other end of the base plate (1) is fixedly connected to a tail beam (11). The top of the tail beam (11) is fixedly connected to a cover plate (12). A support plate (13) is provided on one side of the cover plate (12). The support plate (13) is slidably connected inside the main frame. The bottom of the support plate (13) is fixedly connected to a second movable box (14). Each of the two movable boxes (10) is fixedly connected to a movable seat (15) on one side. Each of the two movable seats (15) is provided with an outer wall clamping assembly and an inner wall support assembly. The experimental tube (16) is located between the two outer wall clamping assemblies and the inner wall support assembly. Each of the two first movable boxes (10) is provided with a transmission assembly. The outer wall clamping assembly and the inner wall support assembly are connected by the transmission assembly. The inner wall support assembly includes a displacement mechanism and multiple lifting mechanisms. The multiple lifting mechanisms are arranged in a ring array outside the displacement mechanism. The displacement mechanism includes a threaded rod (17), a movable block (18), and a fixed sleeve (22). The threaded rod (17) passes through the movable seat (15) and is connected to the movable seat (15). The rotating connection is as follows: the fixed sleeve (22) is sleeved on the outside of the threaded rod (17), the moving block (18) is sleeved on the outside of the threaded rod (17) and threadedly connected to the threaded rod (17); the moving block (18) is fixedly connected to both sides of the two sides of the two sides of the two sides of the fixed sleeve (22); the two positioning plates (23) are fixedly connected to one side of the two positioning plates (23); the two positioning rods (24) are fixedly connected to one end of the two positioning rods (24); the two positioning rods (24) pass through the two first fixed plates (19) respectively and are slidably connected to the first fixed plates (19); the lifting mechanism includes the first fixed plate (19), the first lifting rod (20), and the second lifting rod (25). The device consists of a rod (21), a fixed sleeve (22), a second fixed plate (29), and a support plate (26). The first fixed plate (19) is fixedly connected to the outside of the moving block (18). The bottom end of the first top rod (20) is hinged to the first fixed plate (19), and the bottom end of the second top rod (21) is hinged to the second fixed plate (29). A rotating rod (27) is provided between the first top rod (20) and the second top rod (21). The rotating rod (27) passes through the top ends of the first top rod (20) and the second top rod (21) and is rotatably connected to the first top rod (20) and the second top rod (21). Both ends of the rotating rod (27) are fixedly connected to fixed rods (28). The top end of the fixed rod (28) is fixedly connected to the support plate (26).

2. The horizontal tensile force testing device for full-size pipes according to claim 1, characterized in that: The first top rod (20) and the second top rod (21) are both fixedly connected to the top of the lower hinge block (30), and the support plate (26) is fixedly connected to the bottom sides of the upper hinge block (34). The top of the two lower hinge blocks (30) are hinged to the sliding sleeve (31), and the two sliding sleeves (31) are slidably connected to the sliding rod (32). A spring (33) is fixedly connected between the sliding sleeve (31) and the sliding rod (32), and the top of the sliding rod (32) is hinged to the upper hinge block (34).

3. The horizontal tensile force testing device for full-size pipes according to claim 1, characterized in that: The outer wall clamping assembly includes a turntable (35), multiple sliding plates (36), multiple clamping plates (37), and multiple locking plates (38). The multiple sliding plates (36) are arranged in a ring array inside the movable seat (15). The multiple sliding plates (36) penetrate the outer wall of the movable seat (15) and are slidably connected to the movable seat (15). The bottom end of the multiple sliding plates (36) is fixedly connected to a guide rod (39). The turntable (35) has multiple sliding grooves (40) inside. The multiple guide rods (39) penetrate the multiple sliding grooves (40) respectively and are slidably connected to the multiple sliding grooves (40).

4. The horizontal tensile force testing device for full-size pipes according to claim 1, characterized in that: The transmission assembly includes a main gear (41), a rotating shaft (42), an internal gear ring (43), an external gear ring (44), and a rotating frame (49). The rotating frame (49) is rotatably connected to the inside of the movable seat (15). The rotating shaft (42) passes through the rotating frame (49) and is rotatably connected to the rotating frame (49). The main gear (41) is fixedly connected to the outside of the rotating shaft (42). One end of the rotating shaft (42) is fixedly connected to the threaded rod (17). The internal gear ring (43) and the external gear ring (44) are both rotatably connected to the inside of the movable seat (15).

5. The horizontal tensile force testing device for a full-size pipe according to claim 4, characterized in that: The rotating frame (49) has a first positioning rod (45) rotatably connected to both ends on one side. The two first positioning rods (45) are fixedly connected to the outer sides of the two planetary gears (46). The two planetary gears (46) are simultaneously meshed with the main gear (41) and the internal gear ring (43). The internal gear ring (43) is meshed with positioning gears (48) on both sides. The two positioning gears (48) are simultaneously meshed with the external gear ring (44). The positioning gears (48) are fixedly connected to the inside of the positioning rods (48). The second positioning rods (47) are rotatably connected to the inside of the moving seat (15). The external gear ring (44) is fixedly connected to the turntable (35).

6. The horizontal tensile force testing device for a full-size pipe according to claim 1, characterized in that: The main frame includes two first bearing columns (2), two second bearing columns (3) and two third bearing columns (4). The top of the base plate (1) is fixedly connected to multiple supports (54). The two ends of the multiple supports (54) are fixedly connected to the first bearing columns (2), the second bearing columns (3) and the third bearing columns (4) respectively. A crossbeam base (6) is fixedly connected to the bottom of one end of each of the two first bearing columns (2). A mounting beam base (5) is fixedly connected to the bottom of one end of each of the two third bearing columns (4). The mounting beam base (5) and the crossbeam base (6) are both fixedly connected to the base plate (1).

7. The horizontal tensile force testing device for full-size pipes according to claim 1, characterized in that: Movable plates (50) are fixedly connected to both sides of the support plate (13). Transmission boxes (52) are fixedly connected to the bottom of the two movable plates (50). Slide rails (53) are fixedly connected to both sides of the bottom of the main frame. The two transmission boxes (52) are slidably connected to the outside of the two slide rails (53). Power motors (51) are fixedly connected inside the two movable plates (50). The output ends of the two power motors (51) are connected to the transmission boxes (52).

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