A hose fatigue resistance u-test apparatus

Abstract

The utility model discloses a kind of hose fatigue resistance U-shaped test equipment, including first clamping mechanism, load mechanism and second clamping mechanism, first clamping mechanism includes rotating assembly and first clamping component, rotating assembly is used to drive first clamping component rotation, second clamping mechanism includes lifting assembly and second clamping component, lifting assembly is in driving second clamping component ascending or descending, load mechanism includes counterweight and rotating rod, the rotating rod is assembled on counterweight, rotating assembly drives first clamping component rotation, and then drive hose and it synchronous rotation, the circumference of hose is sequentially contacted with rotating rod, by the load provided by counterweight, every surface of hose can simulate stress condition in actual use, since hose in U shape state, its circumference constantly experiences simulation actual stress process, this repeated stress change can make hose produce fatigue effect, to realize to the circumference of hose carries out fatigue resistance U-shaped test.

Description

Technical Field

[0001] This utility model relates to the technical field of hose fatigue testing equipment, specifically a hose fatigue U-shaped testing equipment. Background Technology

[0002] As a flexible pipe component widely used in various industrial and civil fields, hoses are frequently subjected to various complex mechanical forces such as alternating loads, bending, tension, and compression during actual use. The hose fatigue U-shaped test equipment is a professional device used to evaluate the fatigue resistance, flexibility, and failure mode of hoses under repeated bending stress. Its core function is to simulate U-shaped bending conditions and combine high-precision drive, intelligent control, and data recording system to provide a reliable basis for hose quality control and R&D. The hose fatigue U-shaped test equipment simulates the repeated bending conditions of hoses in actual use and applies controllable U-shaped bending stress to detect its structural stability, fatigue life, and failure mode. During the test, the equipment records parameters such as the number of bending times, angle, and stress until the hose develops cracks, breaks, or its performance degrades to the failure standard, thereby evaluating its fatigue resistance. However, in the field of existing hose fatigue testing equipment, most devices do not have a rotating component. This design flaw severely limits the testing range when actually conducting hose fatigue testing. Since the hose can only maintain a fixed posture, the test can only be performed on a single surface of the hose. However, in actual application scenarios, each surface of the hose will be subjected to forces of different directions and degrees. This method of testing only a single surface cannot comprehensively and realistically simulate the complex stress conditions faced by the hose in actual use, and therefore it is difficult to accurately evaluate the overall fatigue performance of the hose. Utility Model Content

[0003] In order to overcome the shortcomings of existing technical solutions, this utility model provides a hose fatigue U-shaped testing device, which can effectively solve the technical problems mentioned in the background art.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a hose fatigue U-shaped testing device, including a first clamping mechanism, a load mechanism and a second clamping mechanism; The first clamping mechanism includes a rotating component and a first clamping component, wherein the rotating component is convexly connected to the first clamping component and is used to drive the first clamping component to rotate; The second clamping mechanism includes a lifting component and a second clamping component. The lifting component is connected to the second clamping component and is used to drive the second clamping component to rise or fall. The load mechanism includes a counterweight and a rotating rod, with the rotating rod mounted on the counterweight.

[0005] Furthermore, the load mechanism also includes a lifting guide rail and a lifting slide plate. The lifting slide plate is equipped with a slider that slides with the lifting guide rail, and a counterweight is mounted on the lifting slide plate and moves up and down synchronously with it.

[0006] Furthermore, the lifting guide rail is provided with limiting protrusions for restricting the sliding displacement of the lifting slide plate.

[0007] Furthermore, the counterweight is detachably connected to the lifting slide plate.

[0008] Furthermore, the counterweight engages in sliding cooperation with the lifting slide plate.

[0009] Furthermore, the rotating rod is detachably connected to the counterweight.

[0010] Furthermore, the rotating rod is rotatably connected to the counterweight.

[0011] Furthermore, the rotating assembly includes a rotating drive and a rotating shaft, with the first clamping assembly mounted on the rotating shaft. The rotating drive drives the rotating shaft to rotate, causing the rotating shaft to rotate the first clamping assembly and the hose.

[0012] Furthermore, the lifting assembly includes a lifting drive and a robotic arm, with a second clamping assembly mounted on the robotic arm. The lifting drive drives the robotic arm to move, causing the robotic arm to move the second clamping assembly and the hose in a vertical lifting motion.

[0013] Furthermore, the second gripping assembly is rotatably connected to the robotic arm.

[0014] Compared with the prior art, the beneficial effects of this utility model are: The rotating component drives the first clamping component to rotate, which in turn causes the hose to rotate synchronously, so that the circumference of the hose contacts the rotating rod in sequence. Through the load provided by the counterweight, each surface of the hose can simulate the stress situation in actual use. Since the hose is in a U-shape, its circumference continuously experiences the simulated actual stress process. This repeated stress change will cause fatigue effect in the hose, thereby realizing the fatigue resistance U-shaped test of the hose circumference. Attached Figure Description

[0015] Figure 1 This is a plan view of a U-shaped testing device for hose fatigue resistance; Figure 2 A perspective view of a U-shaped testing device for hose fatigue resistance; Figure 3 for Figure 2 Enlarged view of the structure of section A; Figure 4 This is an assembly diagram of the lifting slide, counterweight, and rotating rod.

[0016] Numbering on the map: 1. Hose; 2. Rotating assembly; 3. First clamping assembly; 4. Rotating rod; 5. Lifting guide rail; 6. Lifting assembly; 7. Guide groove; 8. Counterweight; 9. Threaded groove; 10. Slider; 11. Lifting slide plate; 12. Robot arm; 13. Lifting drive component; 14. Second clamping assembly; 15. Mounting bracket; 16. Rotating seat; 17. Limiting protrusion; 18. Rotating drive component. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] like Figure 1-4 As shown, this utility model provides a hose fatigue U-shaped testing device, including a frame, on which a first clamping mechanism, a load mechanism and a second clamping mechanism are mounted; The first clamping mechanism includes a rotating component 2 and a first clamping component 3. The rotating component 2 is connected to the first clamping component 3 in a transmission manner and is used to drive the first clamping component 3 to rotate. The second clamping mechanism includes a lifting component 6 and a second clamping component 14. The lifting component 6 is connected to the second clamping component 14 and is used to drive the second clamping component 14 to rise or fall. The load mechanism includes a counterweight 8 and a rotating rod 4. The rotating rod 4 is mounted on the counterweight 8. The counterweight 8 is used to provide a load to the hose 1 to simulate the force situation in actual use. One end of the hose 1 is clamped on the first clamping assembly 3, and the other end is clamped on the second clamping assembly 14 after passing over the rotating rod 4. The counterweight 8 is suspended and tends to slide downward under the action of gravity. The part of the hose 1 that passes over the rotating rod 4 contacts the rotating rod 4. This contact part generates a supporting force on the counterweight 8, making the counterweight 8 stationary. At this time, the hose 1 is in a U-shape due to the clamping at both ends and the tension of the counterweight 8, which provides accurate load conditions for the fatigue test of the hose 1. The lifting assembly 6 drives the second clamping assembly 14 to rise, and makes the hose 1 overcome the gravity of the counterweight 8 and drive the counterweight 8 to move upward. At the same time, the first clamping assembly 3 is designed to be fixed relative to the frame. When the second clamping assembly 14 rises, the hose 1 clamped at one end will rise with it, while the other end clamped on the fixed first clamping assembly 3 remains in the same position. In this way, the hose 1 will generate an upward movement relative to the other end, simulating the stretching, bending deformation and other working conditions of the hose 1 in actual use. More preferably, the load mechanism further includes a lifting guide rail 5 and a lifting slide plate 11. The lifting guide rail 5 is mounted on the frame and extends along the height direction of the frame. The lifting slide plate 11 is provided with a slider 10 that slides with the lifting guide rail 5. The counterweight 8 is mounted on the lifting slide plate 11 and moves up and down synchronously with it. The design of the lifting guide rail 5 and the lifting slide plate 11 can play a guiding role to ensure that the counterweight 8 moves up and down in a vertical direction. At the same time, the top and bottom ends of the lifting guide rail 5 are provided with limiting protrusions 17. The limiting protrusions 17 are used to limit the sliding displacement of the lifting slide plate 11 and prevent the lifting slide plate 11 from disengaging from the lifting guide rail 5.

[0019] Since different types of hoses 1 differ in material, specifications, and usage scenarios, they can withstand different loads. Therefore, in this embodiment, the counterweight 8 is detachably connected to the lifting slide plate 11, which facilitates the disassembly and replacement of counterweights 8 of different weights. Operators can set different loads according to different types of hoses 1, thereby improving the accuracy and reliability of the fatigue test of hose 1. More preferably, the lifting slide plate 11 is provided with a guide groove 7 extending along its length. The guide groove 7 provides a guiding path for the movement of the counterweight 8. The counterweight 8 is provided with a guide block adapted to the guide groove 7, so that the counterweight 8 can adjust its position on the lifting slide plate 11 through the sliding engagement of the guide block and the guide groove 7. The counterweight 8 is also provided with a threaded groove 9. By adjusting the position of the counterweight 8, the tensile force distribution and overall stress state of the hose 1 can be changed. In actual operation, according to the material, diameter, length and other characteristics of the hose 1, the counterweight 8 is adjusted to a preset position so that the hose 1 can move around... When passing the rotating rod 4, its bending arc is more uniform and reasonable, reducing friction and jamming between the hose 1 and the rotating rod 4, thus allowing the hose 1 to wrap more smoothly and closely around the rotating rod 4, ensuring the stability and accuracy of the hose 1's state during subsequent testing or use. Then, screw the locking nut into the threaded groove 9, so that the end face of the locking nut contacts the surface of the lifting slide plate 11, and continue to tighten the locking nut. The friction generated between the locking nut and the lifting slide plate 11 fixes the counterweight 8 relative to the lifting slide plate 11, thereby effectively limiting the position of the counterweight 8 on the lifting slide plate 11 and preventing it from moving accidentally during operation.

[0020] The rotating rod 4 is detachably connected to the counterweight 8, so as to facilitate the disassembly and replacement of rotating rods 4 with different apertures to adapt to hoses 1 of different diameters. The rotating rod 4 is rotatably connected to the counterweight 8. The counterweight 8 is provided with a shaft hole, and a bearing is embedded in the shaft hole. One end of the rotating rod 4 is interference-fitted with the inner ring of the bearing, so that the rotating rod 4 can rotate relative to the counterweight 8. During the process of the hose 1 rising or falling, since the rotating rod 4 can rotate relative to the counterweight 8, the sliding friction between the hose 1 and the rotating rod 4 can be converted into rolling friction, effectively reducing the wear on the surface of the hose 1. The rotating component 2 drives the first clamping component 3 to rotate, thereby causing the hose 1 to rotate synchronously, so that the circumferential surface of the hose 1 contacts the rotating rod 4 in sequence. Through the load provided by the counterweight 8, each surface of the hose 1 can simulate the force situation in actual use. Since the hose 1 is in a U-shaped state, its circumferential surface continuously experiences the simulated actual force process. This repeated force change will cause the hose 1 to produce a fatigue effect, thereby realizing the anti-fatigue U-shaped test of the circumferential surface of the hose 1. In this embodiment, the rotating component 2 includes a rotating drive component 18 and a rotating shaft. The first clamping component 3 is assembled on the rotating shaft. The rotating drive component 18 drives the rotating shaft to rotate, so that the rotating shaft drives the first clamping component 3 and the hose 1 to rotate. In this embodiment, the lifting assembly 6 includes a lifting drive 13 and a robotic arm 12. A second clamping assembly 14 is mounted on the robotic arm 12. The robotic arm 12 is a six-axis robotic arm. The lifting drive 13 drives the robotic arm 12 to move, causing the robotic arm 12 to move the second clamping assembly 14 and the hose 1 vertically. The second clamping assembly 14 is rotatably connected to the robotic arm 12. The robotic arm 12 is provided with a mounting bracket 15 connected thereto. The mounting bracket 15 is provided with a rotating seat 16 rotatably connected thereto. The second clamping assembly 14 is mounted on the rotating seat 16. The mounting bracket 15 is provided with a shaft hole. The rotating seat 16 is internally embedded with a bearing, and the bottom end of the rotating seat 16 is interference-fitted with the inner ring of the bearing, so that the second clamping assembly 14 can rotate relative to the mounting bracket 15. In the actual test, the rotating drive 18 drives the rotating shaft to rotate, and the rotating shaft drives the first clamping assembly 3 and the hose 1 to rotate synchronously. During the rotation of the hose 1, one end is driven by the rotation of the first clamping assembly 3, and the other end is connected to the second clamping assembly 14. The second clamping assembly 14 can rotate relative to the mounting bracket 15. Under the interaction of the tension and friction generated by the rotation of the hose 1, the rotating seat 16 rotates accordingly, thereby realizing the synchronous rotation of both ends of the hose 1. It should be clearly pointed out that the robotic arm 12, the first gripping component 3, the second gripping component 14, and the rotating component 2 in this technical solution are all conventional technical components in the field of mechanical engineering. The specific number and configuration of the robotic arm 12's degrees of freedom, the clamping method such as clamping or adsorption used by the gripping component, and the transmission mechanism such as direct motor drive or reducer transmission of the rotating component 2 are not the core innovation of this technical solution. In practical applications, any existing structure or technology on the market that can achieve the same or similar functional effects can replace the corresponding components in this technical solution without affecting the implementation of the overall technical solution and the achievement of the expected results.

[0021] Working principle: One end of the hose 1 is clamped on the first clamping assembly 3, and the other end is clamped on the second clamping assembly 14 after passing around the rotating rod 4. The counterweight 8 is in a suspended state and tends to slide downward under the action of gravity. The part of the hose 1 that passes around the rotating rod 4 contacts the rotating rod 4. This contact part generates a supporting force on the counterweight 8. When the supporting force and the weight of the counterweight 8 are balanced, the counterweight 8 is stationary. In this state, the hose 1 takes on a U-shape due to the clamping constraint at both ends and the tension of the counterweight 8, which provides accurate load conditions for the fatigue test of the hose 1. The lifting assembly 6 drives the second clamping assembly 14 to rise. Since the first clamping assembly 3 is designed to be fixed relative to the frame, when the second clamping assembly 14 rises, the hose 1 clamped at one end will rise with it, and the hose 1 will overcome the gravity of the counterweight 8 and drive the counterweight 8 to move upward. Meanwhile, the other end clamped on the fixed first clamping assembly 3 remains in the same position. In this way, the hose 1 will move upward relative to the other end, simulating the stretching, bending and deformation of the hose 1 in actual use. By controlling the rising speed and distance of the lifting assembly 6, different intensities and frequencies of stretching deformation can be simulated, thereby testing the fatigue resistance of the hose 1. The rotary drive 18 drives the rotary shaft to rotate, which in turn drives the first clamping assembly 3 and the hose 1 to rotate synchronously. During the rotation, one end of the hose 1 is driven by the rotation of the first clamping assembly 3, while the other end is connected to the second clamping assembly 14, which can rotate relative to the mounting bracket 15. Under the interaction of the tension and friction generated by the rotation of the hose 1, the rotating seat 16 rotates accordingly, thereby achieving synchronous rotation of both ends of the hose 1. As the hose 1 rotates, its circumference will contact the rotating rod 4 in sequence. Under the load provided by the counterweight 8, each surface of the hose 1 can simulate the stress situation in actual use. Since the hose 1 is in a U-shaped state, its circumference continuously experiences the simulated actual stress process. This repeated stress change will cause the hose 1 to produce a fatigue effect, thereby realizing the fatigue resistance U-shaped test of the circumference of the hose 1.

[0022] Compared to traditional technologies: 1. The rotating component 2 drives the first clamping component 3 to rotate, thereby causing the hose 1 to rotate synchronously, so that the circumferential surface of the hose 1 contacts the rotating rod 4 in sequence. Through the load provided by the counterweight 8, each surface of the hose 1 can simulate the stress situation in actual use. Since the hose 1 is in a U-shaped state, its circumferential surface continuously experiences the simulated actual stress process. This repeated stress change will cause the hose 1 to produce a fatigue effect, thereby realizing the fatigue resistance U-shaped test of the circumferential surface of the hose 1. 2. The counterweight 8 is detachably connected to the lifting slide plate 11, which makes it easy to disassemble and replace the counterweight 8 with different weights. The staff can set different loads according to different types of hoses 1, thereby improving the accuracy and reliability of the fatigue test of hose 1. 3. The rotating rod 4 and the counterweight 8 are detachably connected to facilitate the disassembly and replacement of rotating rod 4 with different orifice diameters to accommodate hoses 1 of different diameters.

[0023] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A U-shaped fatigue resistance testing device for flexible hoses, characterized in that, It includes a first clamping mechanism, a load-bearing mechanism, and a second clamping mechanism; The first clamping mechanism includes a rotating component and a first clamping component, wherein the rotating component is convexly connected to the first clamping component and is used to drive the first clamping component to rotate; The second clamping mechanism includes a lifting component and a second clamping component. The lifting component is connected to the second clamping component and is used to drive the second clamping component to rise or fall. The load mechanism includes a counterweight and a rotating rod, with the rotating rod mounted on the counterweight.

2. The hose fatigue U-shaped testing device according to claim 1, characterized in that, The load mechanism also includes a lifting guide rail and a lifting slide plate. The lifting slide plate is equipped with a slider that slides with the lifting guide rail, and a counterweight is mounted on the lifting slide plate and moves up and down synchronously with it.

3. The hose fatigue U-shaped testing device according to claim 2, characterized in that, The lifting guide rail is equipped with limiting protrusions to restrict the sliding displacement of the lifting slide plate.

4. The hose fatigue U-shaped testing device according to claim 2, characterized in that, The counterweight is detachably connected to the lifting slide plate.

5. The hose fatigue U-shaped testing device according to claim 4, characterized in that, The counterweight is in sliding cooperation with the lifting slide plate.

6. The hose fatigue U-shaped testing device according to claim 1, characterized in that, The rotating rod is detachably connected to the counterweight.

7. The hose fatigue U-shaped testing device according to claim 6, characterized in that, The rotating rod is rotatably connected to the counterweight.

8. The hose fatigue U-shaped testing device according to claim 1, characterized in that, The rotating assembly includes a rotating drive and a rotating shaft. The first clamping assembly is mounted on the rotating shaft. The rotating drive drives the rotating shaft to rotate, causing the rotating shaft to rotate the first clamping assembly and the hose.

9. The hose fatigue U-shaped testing device according to claim 1, characterized in that, The lifting assembly includes a lifting drive and a robotic arm. The second clamping assembly is mounted on the robotic arm. The lifting drive drives the robotic arm to move, causing the robotic arm to move the second clamping assembly and the hose in a vertical lifting motion.

10. The hose fatigue U-shaped testing device according to claim 9, characterized in that, The second gripping assembly is rotatably connected to the robotic arm.

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