Non-adhesive flexible pipe stretch-bending combined test method and equipment

Abstract

The invention relates to a non-adhesive flexible pipe stretch-bending combined test method which specifically comprises the following steps: inputting a bending radius, and calculating the moving positions of four concave rollers; the pipe diameter of a test sample pipe is input, and the moving position of the tangent wheel is calculated; the motor control module controls four first motors of the bending radius adjusting mechanism to act, and position adjustment of four concave rollers is achieved. The two line cutting wheels are controlled to move until the line cutting wheels are adjusted to the line cutting wheel positions calculated by the calculation module; mounting the test sample tube on the sample tube supporting mechanism, and providing tensile force to pre-stretch and bend the test sample tube; setting tension and time of a stretch-bending combination test, and performing the test; and completing the test. According to the bending radius of the test sample tube, the moving position of the concave roller of the bending radius adjusting mechanism can be calculated and electrically controlled to adjust, the tangent point positioning requirement of the bending radius of the test sample tube can be met according to the tube diameter of the test sample tube, the test sample tube with multiple sizes can be compatible, the applicability is high, and the test tension coverage range is large.

Description

Technical Field

[0001] The invention relates to the technical field of stretching and bending equipment, in particular to a non-bonded flexible pipe stretching and bending combined test method and equipment. Background Art

[0002] In the field of non-bonded flexible pipe prototype testing, the tension-bending combination test machine is a test equipment manufactured for special tension-bending combination tests. The purpose of this test is to verify that the specified flexible pipe is suitable for horizontal and roller-mounted equipment. The test needs to simulate the bending conditions of the test sample pipe, and the tangent direction of the bending arc is used as the direction of tension. In order to achieve the bending conditions, some companies use disposable arc tooling, and weld disposable shaping tooling on the tensile testing machine according to the required radius. Different projects need to cut off the original arc tooling and re-weld it, which is time-consuming, labor-intensive, and material-intensive, and tests the welding ability of welders. The bending radius and tangent direction accuracy are difficult to guarantee, and the test process is too complicated, backward, and inefficient. Summary of the invention

[0003] To this end, the technical problem to be solved by the present invention is to overcome the shortcomings in the prior art and provide a non-bonded flexible tube tension and bending combined test method and equipment, which can accurately calculate and electrically adjust the moving position of the concave roller of the bending radius adjustment mechanism according to the bending radius of the test sample tube, and realize the positioning requirement of the bending radius intersection point of the test sample tube according to the tube diameter of the test sample tube. It is compatible with test sample tubes of multiple sizes, has strong applicability, and covers a large range of test tension.

[0004] In a first aspect, in order to solve the above technical problems, the present invention provides a non-bonded flexible pipe tension and bending combined test method, comprising the following steps: Step S1, input the bending radius in the human-machine interface of the control system, and the calculation module of the control system calculates the moving positions of the four concave rollers; Step S2, in the human-computer interaction interface of the control system, input the diameter of the test sample pipe, and the calculation module of the control system calculates the moving position of the tangent wheel; Step S3, the motor control module controls the four first motors of the bending radius adjustment mechanism to move, respectively controls the corresponding adjustment screws to rotate, and realizes the position adjustment of the four concave rollers, until the concave rollers are adjusted to the positions of the concave rollers corresponding to the radius of the test sample tube test design; Step S4: the motor control module controls the two second motors of the stretch-bending guide mechanism to move, and respectively controls the two tangent wheels to move their positions until the tangent wheels are adjusted to the tangent wheel positions calculated by the calculation module of the control system; Step S5, installing the test sample tube on the sample tube support mechanism, and connecting the two ends of the test sample tube to the telescopic rods of the first oil cylinder and the second oil cylinder with a connecting piece; Step S6, the first oil cylinder and the second oil cylinder are actuated to provide tension to pre-bend the test sample pipe so that the test sample pipe is attached to the concave roller of the bending radius adjustment mechanism; Step S7, setting the tension and time of the tension-bending combination test on the human-machine interface of the control system, and conducting the test; Step S8: After the test is completed, the bending radius adjustment mechanism, the stretch-bending mechanism and the stretch-bending guide mechanism are reset.

[0005] In a second aspect, in order to solve the above technical problems, the present invention provides a non-bonded flexible pipe tension and bending combined test equipment, comprising: Pedestal; The sample tube supporting mechanism is used to support the test sample tube from the bottom; A bending radius adjustment mechanism is arranged on the base and is used to abut the test sample tube to adjust the bending radius; the bending radius adjustment mechanism comprises a fixed support roller and four sets of bending radius adjustment units arranged in parallel, and two sets of bending radius adjustment units are respectively arranged on both sides of the fixed support roller; A bending mechanism is arranged on the base and is used to apply tension to both sides of the test sample tube; the bending mechanism comprises a first oil cylinder, a second oil cylinder, a steel wire rope and a connecting piece, the first oil cylinder and the second oil cylinder are arranged on the base through an oil cylinder rotating connecting seat, the telescopic rods of the first oil cylinder and the second oil cylinder are connected to one end of the steel wire rope through a pull head bracket, and the other end of the steel wire rope is connected to the connecting piece; the connecting piece is connected to both ends of the test sample tube; The bending guide mechanism is arranged on the base, and is used for adjusting the pulling direction of the wire rope so that the pulling direction is consistent with the tangent direction of the bending radius of the test sample pipe; the bending guide mechanism includes a second motor, a guide wire rod, a guide wire nut support, a tangent wheel connecting seat and a tangent wheel, the second motor is arranged on the base through a motor support, and the output shaft of the second motor is connected to one end of the guide wire rod; the guide wire nut support is fixedly arranged on the base and is threadedly connected to the guide wire rod, the other end of the guide wire rod is connected to the tangent wheel connecting seat, the tangent wheel is arranged on the tangent wheel connecting seat, and the tangent wheel is against the wire rope to realize the angle adjustment of the wire rope.

[0006] The control system is used to control the bending radius adjustment mechanism and the bending mechanism to achieve accurate adjustment of the bending radius and tension of the test sample pipe.

[0007] In one embodiment of the present invention, the sample tube support mechanism includes a support seat, a third motor, a lifting screw, a support plate and a lifting guide rod. The third motor is arranged on the support seat. The output shaft of the third motor is connected to the lifting screw through a bevel gear assembly. The support plate and the lifting screw are connected through a flange. The lifting guide rod is arranged between the support seat and the support plate for guiding the lifting and lowering action of the support plate.

[0008] In one embodiment of the present invention, sliding blocks are provided at both ends of the support seat, and a third linear guide rail matched with the sliding blocks is provided on the base.

[0009] In one embodiment of the present invention, the bending radius adjustment unit includes a first motor, a motor support plate, an adjusting screw, a nut connector, a concave roller and a roller support seat. The first motor is installed on the base through the motor support plate, one end of the adjusting screw is connected to the output shaft of the first motor, the nut connector is fixed on the base and threadedly connected to the adjusting screw, and the roller support seat is connected to the other end of the adjusting screw; the concave roller is arranged on the roller support seat to limit the bending radius of the test sample tube.

[0010] In one embodiment of the present invention, the oil cylinder rotating connecting seat includes a first oil ear support, a second oil ear support and an oil cylinder master pin, and the oil cylinder master pin is interspersed on the first oil ear support and the second oil ear support.

[0011] In one embodiment of the present invention, a first guide groove for slidingly guiding the roller support seat is provided on the base.

[0012] In one embodiment of the present invention, a second guide groove for guiding the tangent wheel connecting seat is provided on the base.

[0013] In one embodiment of the present invention, the control system includes a calculation module, a motor control module and a tension control module, wherein: A calculation module, used for calculating the position of the tangent wheel according to the size of the test sample tube; The motor control module is used to control the actions of the four first motors of the bending radius adjustment mechanism and the two second motors of the bending guide mechanism, and adjust the bending radius of the test sample tube by adjusting the position of the four concave rollers; and adjust the position of the two tangent wheels to make the pulling direction consistent with the tangent direction of the bending radius of the test sample tube; The tension control module is used to control the actions of the first oil cylinder and the second oil cylinder, and provide pre-tension so that the test sample pipe fits on the concave roller wheel of the bending radius adjustment mechanism.

[0014] In one embodiment of the present invention, the control system further comprises a human-computer interaction interface for setting the loading rate and holding time of the tension, and recording the changes in displacement, tension value and time during the test.

[0015] The above technical solution of the present invention has the following beneficial effects compared with the prior art: The non-bonded flexible tube tension-bending combined test method described in the present invention can accurately calculate and electrically adjust the moving position of the concave roller of the bending radius adjustment mechanism according to the bending radius of the test sample tube, and realize the positioning requirement of the bending radius intersection point of the test sample tube according to the tube diameter of the test sample tube. It is compatible with test sample tubes of multiple sizes, has strong applicability, and covers a large range of test tension. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the contents of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0017] Figure 1 It is a structural schematic diagram of a non-bonded flexible pipe tension-bending combined test device in a preferred embodiment of the present invention; Figure 2 for Figure 1 The schematic diagram of the internal structure of the non-bonded flexible pipe tension-bending combined test equipment shown; Figure 3 for Figure 1 The structural schematic diagram of the bending radius adjustment mechanism of the non-bonded flexible pipe tension-bending combined test equipment shown; Figure 4 for Figure 1 The calculation principle diagram of the calculation module of the non-bonded flexible pipe tension-bending combined test equipment shown; Explanation of the reference numerals in the specification: 1. base; 11. first guide groove; first guide groove; 2. sample tube support mechanism; 21. support seat; 22. third motor; 23. lifting screw rod; 24. support plate; 25. lifting guide rod; 26. slider; 3. bending radius adjustment mechanism; 31. fixed support roller; 32. bending radius adjustment unit; 321. first motor; 322. adjusting screw rod; 323. nut connector; 324. roller support seat; 325. concave roller; 4. bending mechanism; 41. first oil cylinder; 42. second oil cylinder; 43. wire rope; 44. connector; 45. oil cylinder rotating connector; 451. first oil ear support; 452. second oil ear support; 453. main plug of oil cylinder; 5. bending guide mechanism; 51. second motor; 52. guide screw rod; 53. guide wire nut support; 54. tangent wheel connector; 55. tangent wheel. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention. Example

[0019] Reference Figure 1-3 As shown, the present invention provides a non-bonded flexible pipe tension and bending combined test equipment, comprising: Base 1; The sample tube support mechanism 2 is used to support the test from the bottom; The bending radius adjustment mechanism 3 is arranged on the base 1 and is used to adjust the bending radius by testing the test. The bending radius adjustment mechanism 3 includes a fixed support roller 31 and four sets of bending radius adjustment units 32 arranged in parallel. Two sets of bending radius adjustment units 32 are respectively arranged on both sides of the fixed support roller 31. The bending and stretching mechanism 4 is arranged on the base 1 and is used to apply tension to both sides of the test; the bending and stretching mechanism 4 comprises a first oil cylinder 41, a second oil cylinder 42, a steel wire rope 43 and a connecting piece 44, the first oil cylinder 41 and the second oil cylinder 42 are arranged on the base 1 through an oil cylinder rotating connecting seat 45, the telescopic rods of the first oil cylinder 41 and the second oil cylinder 42 are connected to one end of the steel wire rope 43 through a pulling head bracket 46, and the other end of the steel wire rope 43 is connected to the connecting piece 44; the connecting piece 44 is connected to both ends of the test; The bending guide mechanism 5 is arranged on the base 1, and is used to adjust the pulling direction of the wire rope 43 so that the pulling direction is consistent with the tangent direction of the bending radius of the test; the bending guide mechanism 5 includes a second motor 51, a guide screw 52, ​​a guide screw nut support 53, a tangent wheel connection seat 54 and a tangent wheel 55. The second motor 54 is arranged on the base 1 through a motor support, and the output shaft of the second motor 51 is connected to one end of the guide screw 52; the guide screw nut support 53 is fixedly arranged on the base 1 and is threadedly connected to the guide screw 52, ​​and the other end of the guide screw 52 is connected to the tangent wheel connection seat 54. The tangent wheel 55 is arranged on the tangent wheel connection seat 54, and the tangent wheel 55 is against the wire rope 43 to achieve the angle adjustment of the wire rope 43. The motor mounting plate of the bending guide mechanism 5 is provided with a second linear slide rail, and the second motor 51 is connected to the second linear slide rail 56 through a sliding seat; The control system is used to control the bending radius adjustment mechanism 4 and the bending mechanism 5 to achieve precise adjustment of the bending radius and tension of the test sample pipe.

[0020] The sample tube supporting mechanism 2 in this embodiment includes a supporting seat 21, a third motor 22, a lifting screw 23, a support plate 24 and a lifting guide rod 25. The third motor 22 is arranged on the supporting seat 21. The output shaft of the third motor 22 is connected to the lifting screw 23 through a bevel gear assembly. The support plate 24 is connected to the lifting screw 23 through a flange. The lifting guide rod 23 is arranged between the supporting seat 21 and the support plate 24, and is used to guide the lifting action of the support plate 24.

[0021] Furthermore, sliders 26 are provided at both ends of the support seat 21 , and a third linear guide rail matched with the sliders 26 is provided on the base 1 .

[0022] In this embodiment, the bending radius adjustment unit 32 includes a first motor 321, an adjustment screw 322, a nut connector 323, a roller support seat 324 and a concave roller 325. The first motor 321 is installed on the base 1 through a motor support plate. One end of the adjustment screw 323 is connected to the output shaft of the first motor 321. The nut connector 323 is fixed on the base 1 and is threadedly connected to the adjustment screw 323. The roller support seat 324 is connected to the other end of the adjustment screw 323. The concave roller 325 is arranged on the roller support seat 324 to limit the bending radius of the test. A first linear slide 326 is arranged on the motor mounting plate of the bending radius adjustment unit 32. The first motor 321 is connected to the first linear slide 326 through a sliding seat.

[0023] In this embodiment, the oil cylinder rotating connecting seat 45 includes a first oil ear support 451, a second oil ear support 452 and an oil cylinder main latch 453, and the oil cylinder main latch 453 is interspersed on the first oil ear support 451 and the second oil ear support 452.

[0024] Furthermore, the base 1 is provided with a first guide groove 11 for slidingly guiding the roller support seat 326 .

[0025] Furthermore, the base 1 is provided with a second guide groove 12 for guiding the tangent wheel connecting seat 54 .

[0026] In this embodiment, the control system includes a calculation module, a motor control module and a tension control module, wherein the calculation module is used to calculate the position of the tangent wheel 55 according to the size of the test; the motor control module is used to control the action of the four first motors 321 of the bending radius adjustment mechanism 3 and the two second motors 51 of the bending guide mechanism 5, and the test bending radius is adjusted by adjusting the position movement of the four concave rollers 325; the tension direction is made consistent with the tangent direction of the test bending radius by adjusting the position of the two tangent wheels 55; the tension control module is used to control the action of the first oil cylinder 41 and the second oil cylinder 42, and provide pre-tension so that the test fits on the concave roller 325 of the bending radius adjustment mechanism 3.

[0027] Furthermore, the control system also includes a human-computer interaction interface for setting the loading rate and holding time of the tension, and recording the changes in displacement, tension value and time during the test. Embodiment 2

[0028] Based on the non-bonded flexible pipe tension and bending combined test equipment in Example 1, the present invention provides a non-bonded flexible pipe tension and bending combined test method, which specifically includes the following steps: Step S1, input the bending radius in the human-machine interface of the control system, and the calculation module of the control system calculates the moving positions of the four concave roller wheels 325; Step S2, input the test pipe diameter in the human-machine interface of the control system, and the calculation module of the control system calculates the moving position of the tangent wheel 55; Step S3, the motor control module controls the four first motors 321 of the bending radius adjustment mechanism 3 to operate, and respectively controls the corresponding adjustment screws 322 to rotate, so as to adjust the positions of the four concave rollers 325, until the concave rollers 325 are adjusted to the positions of the concave rollers 325 corresponding to the radius designed for the test; Step S4: the motor control module controls the two second motors 51 of the stretch-bending guide mechanism 5 to move, and respectively controls the two tangent wheels 55 to move their positions until the tangent wheels 55 are adjusted to the positions of the tangent wheels 55 calculated by the calculation module of the control system; Step S5, installing the test tube on the sample tube support mechanism 2, and connecting the two ends of the test sample tube to the telescopic rods of the first oil cylinder 41 and the second oil cylinder 42 with the connecting piece 44; Step S6, the first oil cylinder 41 and the second oil cylinder 42 are operated to provide a tensile pre-bending test so that the test is attached to the concave roller wheel 325 of the bending radius adjustment mechanism 3; Step S7, setting the tension and time of the tension-bending combination test on the human-machine interface of the control system, and conducting the test; Step S8, the test is completed, and the bending radius adjustment mechanism 3, the stretching and bending mechanism 4 and the stretching and bending guide mechanism 5 are reset.

[0029] The calculation principle of the calculation module in the control system in this embodiment is as follows: H1=R1-R2-R3; H2²=H1²-A²; find H2; L1=H1-H2, H3²=H1²-(2A)²; L2=H1-H3; sin C=2A / H1; cosC=R1 / L3, find L3; L4=L3-R1+R2+R3; tanC=L4 / L5, find L5; L6=L (known)-L5; tanC=L7 / L6, find L7; cosC=R4 / L8, find L8; L movement = L7 + L8.

[0030] Wherein, R1 is the bending radius of the test; R2 is the radius of the test; R3 is the radius of the concave roller wheel 325; R4 is the radius of the tangent wheel 55; like Figure 4 As shown, the four concave rollers 325 and the fixed support roller 31 are set as wheel No. 1, wheel No. 2, wheel No. 3, wheel No. 4 and wheel No. 5 from the left side to the right side in the figure; H1: Under the required radius, calculate the distance from the center of the fixed support roller 31 and the four concave rollers 325 to the center of the bending radius: H2: The vertical distance between the No. 2 wheel and the No. 4 wheel and the center of the bending radius in the horizontal direction after the wheel is adjusted to the bending radius requirement of the sample tube: H2²=H1²-A²; H3: The vertical distance between the No. 1 wheel and the No. 5 wheel and the horizontal direction of the center of the bending radius after the wheels are adjusted to the bending radius requirements of the sample tube; L (known): the distance from the center of wheel No. 3 to the center of the tangent wheel; L1: The distance between the center of the No. 2 and No. 4 wheels and the initial position after adjustment according to the bending radius of the sample tube; L2: The distance between the center of wheel No. 1 and wheel No. 5 and the initial position after adjustment according to the bending radius of the sample tube; L3: The distance from the intersection of the tangent extension line and the perpendicular line to the center of wheel No. 3 to the center of the bending radius of the sample tube; L4: The distance from the intersection of the extended tangent line and the perpendicular line to the center of wheel No. 3 to the center of wheel No. 3; L5: the distance from the intersection of the tangent extension line and the horizontal line where the five circle centers are located to the center of wheel No. 3 when the four concave rollers 325 and the fixed support roller 31 are in the initial position; L movement: displacement from the initial position of the tangent wheel 55 to the adjusted position.

[0031] If the position of the tangent wheel 55 is not at the starting position shown in the figure, it is first assumed to be at the position shown in the figure, and L movement is calculated. The distance between the actual position and the assumed position is set to S, and the actual movement distance is L movement-S.

[0032] During the test, the above formula is substituted according to the different pipe diameters of different projects to calculate the intersection of the tangent of the bending arc and the moving direction of the tangent wheel 55 on both sides of the base 1, and then the second motors on both sides are controlled to push the tangent wheel 55 to move until it moves to the intersection calculated by the calculation module, thereby keeping the tension in the tangent direction of the test bending radius.

[0033] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A non-bonded flexible pipe tension and bending combined test method, characterized in that: The specific steps include: Step S1, input the bending radius in the human-machine interface of the control system, and the calculation module of the control system calculates the moving positions of the four concave rollers; Step S2, in the human-computer interaction interface of the control system, input the diameter of the test sample pipe, and the calculation module of the control system calculates the moving position of the tangent wheel; Step S3, the motor control module controls the four first motors of the bending radius adjustment mechanism to move, respectively controls the corresponding adjustment screws to rotate, and realizes the position adjustment of the four concave rollers, until the concave rollers are adjusted to the positions of the concave rollers corresponding to the radius of the test sample tube test design; Step S4: the motor control module controls the two second motors of the stretch-bending guide mechanism to move, and respectively controls the two tangent wheels to move their positions until the tangent wheels are adjusted to the tangent wheel positions calculated by the calculation module of the control system; Step S5, installing the test sample tube on the sample tube support mechanism, and connecting the two ends of the test sample tube to the telescopic rods of the first oil cylinder and the second oil cylinder with a connecting piece; Step S6: The first oil cylinder and the second oil cylinder are actuated to provide tension to pre-bend the test sample pipe, so that the test sample pipe is attached to the concave roller of the bending radius adjustment mechanism; Step S7, setting the tension and time of the tension-bending combination test on the human-machine interface of the control system, and conducting the test; Step S8: After the test is completed, the bending radius adjustment mechanism, the stretch-bending mechanism and the stretch-bending guide mechanism are reset.

2. A non-bonded flexible pipe tension and bending combined test equipment, characterized in that: include: Pedestal; The sample tube supporting mechanism is used to support the test sample tube from the bottom; A bending radius adjustment mechanism is arranged on the base and is used to abut the test sample tube to adjust the bending radius; the bending radius adjustment mechanism comprises a fixed support roller and four sets of bending radius adjustment units arranged in parallel, and two sets of bending radius adjustment units are respectively arranged on both sides of the fixed support roller; A bending mechanism is arranged on the base and is used to apply tension to both sides of the test sample tube; the bending mechanism comprises a first oil cylinder, a second oil cylinder, a steel wire rope and a connecting piece, the first oil cylinder and the second oil cylinder are arranged on the base through an oil cylinder rotating connecting seat, the telescopic rods of the first oil cylinder and the second oil cylinder are connected to one end of the steel wire rope through a pull head bracket, and the other end of the steel wire rope is connected to the connecting piece; the connecting piece is connected to both ends of the test sample tube; A bending guide mechanism is arranged on the base, and is used to adjust the pulling direction of the wire rope so that the pulling direction is consistent with the tangent direction of the bending radius of the test sample pipe; the bending guide mechanism comprises a second motor, a guide screw, a guide screw nut support, a tangent wheel connection seat and a tangent wheel, the second motor is arranged on the base through a motor support, and the output shaft of the second motor is connected to one end of the guide screw; the guide screw nut support is fixedly arranged on the base, and is threadedly connected to the guide screw, and the other end of the guide screw is connected to the tangent wheel connection seat, the tangent wheel is arranged on the tangent wheel connection seat, and the tangent wheel is against the wire rope to achieve angle adjustment of the wire rope; The control system is used to control the bending radius adjustment mechanism and the bending mechanism to achieve accurate adjustment of the bending radius and tension of the test sample pipe.

3. The non-bonded flexible tube tension and bending combined test equipment according to claim 2, characterized in that: The sample tube supporting mechanism includes a supporting seat, a third motor, a lifting screw, a support plate and a lifting guide rod. The third motor is arranged on the supporting seat. The output shaft of the third motor is connected to the lifting screw through a bevel gear assembly. The support plate and the lifting screw are connected through a flange. The lifting guide rod is arranged between the supporting seat and the support plate for guiding the lifting action of the support plate.

4. The non-bonded flexible tube tension and bending combined test equipment according to claim 3, characterized in that: Slide blocks are arranged at both ends of the support seat, and a third linear guide rail matched with the slide blocks is arranged on the base.

5. The non-bonded flexible tube tension and bending combined test equipment according to claim 4, characterized in that: The bending radius adjustment unit includes a first motor, a motor support plate, an adjusting screw, a nut connector, a concave roller and a roller support seat. The first motor is installed on the base through the motor support plate, one end of the adjusting screw is connected to the output shaft of the first motor, the nut connector is fixed on the base and threadedly connected to the adjusting screw, and the roller support seat is connected to the other end of the adjusting screw; the concave roller is arranged on the roller support seat to limit the bending radius of the test sample tube.

6. The non-bonded flexible tube tension and bending combined test equipment according to claim 5, characterized in that: The oil cylinder rotating connecting seat includes a first oil ear support, a second oil ear support and an oil cylinder master pin, and the oil cylinder master pin is interspersed and arranged on the first oil ear support and the second oil ear support.

7. The non-bonded flexible tube tension and bending combined test equipment according to claim 6, characterized in that: The base is provided with a first guide groove for slidingly guiding the roller support seat.

8. The non-bonded flexible tube tension and bending combined test equipment according to claim 7, characterized in that: The base is provided with a second guide groove for guiding the tangent wheel connecting seat.

9. The non-bonded flexible tube tension and bending combined test equipment according to claim 8, characterized in that: The control system includes a calculation module, a motor control module and a tension control module, wherein: A calculation module, used for calculating the position of the tangent wheel according to the size of the test sample tube; The motor control module is used to control the actions of the four first motors of the bending radius adjustment mechanism and the two second motors of the bending guide mechanism, and adjust the bending radius of the test sample tube by adjusting the position of the four concave rollers; and adjust the position of the two tangent wheels to make the pulling direction consistent with the tangent direction of the bending radius of the test sample tube; The tension control module is used to control the actions of the first oil cylinder and the second oil cylinder, and provide pre-tension so that the test sample pipe fits on the concave roller wheel of the bending radius adjustment mechanism.

10. The non-bonded flexible tube tension and bending combined test equipment according to claim 9, characterized in that: The control system also includes a human-computer interaction interface for setting the loading rate and holding time of the tension and recording the changes in displacement, tension value and time during the test.

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