Rotary bending fatigue testing device for large-inner-diameter corrugated pipe

Abstract

The utility model relates to the technical field of corrugated pipe testing, in particular to a large-inner-diameter corrugated pipe rotating bending fatigue testing device which comprises a workbench, a mounting frame and a deflection frame are fixedly connected to the top of the workbench, a first connecting disc is fixedly connected to the inner wall of the mounting frame, a sliding block is installed on the top of the deflection frame in a sliding mode, and a second connecting disc is fixedly connected to the inner wall of the deflection frame. Clamping mechanisms are mounted on the opposite faces of the first connecting disc and the sliding block correspondingly, each clamping mechanism comprises two mounting columns, a double-thread lead screw, a moving part, a deflection arm and a clamping plate, the bottom of the first connecting disc and the top of the sliding block are fixedly connected with the mounting columns correspondingly, and the double-thread lead screw is fixedly connected with the moving part; the double-thread lead screw is movably mounted in the mounting column, the outer wall of the mounting column is in threaded connection with two moving parts, and the side walls of the moving parts are fixedly connected with four connecting parts. According to the corrugated pipe clamping device, a corrugated pipe can be rapidly clamped and fixed, and more time is saved.

Description

Technical Field

[0001] This utility model relates to the field of corrugated pipe testing, and in particular to a rotating bending fatigue testing device for large-diameter corrugated pipes. Background Technology

[0002] Large-diameter corrugated pipes serve as flexible connections and resist fatigue loads in aerospace, chemical transportation, and other fields. Their rotational bending fatigue performance is a key indicator of structural reliability. The rotational bending fatigue testing device evaluates the fatigue life of corrugated pipes by simulating the stress state under dynamic rotation and bending combined conditions.

[0003] Existing testing equipment typically fixes the bellows to the testing device with bolts. Each time the bellows is installed and removed, the bolts need to be tightened, which is a waste of testing time and is not conducive to the rotational bending fatigue test. Utility Model Content

[0004] In view of this, the present invention provides a large inner diameter corrugated pipe rotational bending fatigue testing device. The main technical problem to be solved is that the corrugated pipe is usually fixed to the testing device with bolts. Each time the corrugated pipe is installed and removed, the bolts need to be tightened, which is very wasteful of testing time and is not conducive to the rotational bending fatigue testing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a large-diameter corrugated pipe rotary bending fatigue testing device, comprising a worktable, a mounting frame and a deflection frame fixedly connected to the top of the worktable, a first connecting plate fixedly connected to the inner wall of the mounting frame, a sliding block slidably mounted on the top of the deflection frame, and clamping mechanisms mounted on the opposite surfaces of the first connecting plate and the sliding block.

[0006] The clamping mechanism includes mounting posts, a double-threaded screw, movable parts, deflection arms, and a clamping plate. There are two mounting posts, one fixedly connected to the bottom of the first connecting plate and the other to the top of the sliding block. The double-threaded screw is movably mounted inside the mounting posts. Two movable parts are threadedly connected to the outer wall of the double-threaded screw. Four connecting parts are fixedly connected to the side walls of the movable parts. A deflection arm is movably mounted on the side wall of each connecting part. A clamping plate is movably mounted on the end of the deflection arm away from the connecting parts.

[0007] The top of the sliding block is fixedly connected to a mounting base, the mounting base has an internal mounting groove, the bottom of the mounting groove is fixedly connected to a first motor, the output end of the first motor is fixedly connected to a first rotating shaft, the bottom of the mounting column is fixedly connected to a second connecting plate, and the end of the first rotating shaft away from the first motor is fixedly connected to the second connecting plate.

[0008] By adopting the above technical solution, the corrugated pipe can be clamped and fixed quickly, saving more time.

[0009] As a further description of the above technical solution:

[0010] A third motor is fixedly connected to the side wall of the mounting column, and a double-threaded screw is fixedly connected to the output end of the third motor. The upper third motor is located inside the first connecting plate, and the lower third motor is located inside the second connecting plate.

[0011] By adopting the above technical solution, the third motor can drive the double-threaded lead screw to rotate.

[0012] As a further description of the above technical solution:

[0013] A second motor is fixedly connected to the side wall of the mounting bracket. A second rotating shaft is fixedly connected to the output end of the second motor. A rotating arm is fixedly connected to the end of the second rotating shaft away from the second motor. A connecting arm is fixedly connected to the side wall of the rotating arm. The end of the connecting arm away from the rotating arm is fixedly connected to the outer wall of the sliding block.

[0014] By adopting the above technical solution, the second motor drives the second rotating shaft to rotate, which in turn drives the rotating arm and connecting arm to rotate around the second rotating shaft, which in turn drives the sliding block to rotate around the second rotating shaft, which in turn drives the lower clamping mechanism to rotate around the second rotating shaft, so that the corrugated pipe clamped between the two clamping mechanisms can be bent, and the bending angle can be adjusted.

[0015] As a further description of the above technical solution:

[0016] The outer surface of the mounting column is provided with four movable grooves.

[0017] By adopting the above technical solution, the movable slot can provide movement space for the connector.

[0018] As a further description of the above technical solution:

[0019] A limiting rod is fixedly connected to the inner wall of the movable groove, and a connecting piece is sleeved on the outer surface of the limiting rod.

[0020] By adopting the above technical solution, the limiting rod can play a limiting role for the connecting parts.

[0021] As a further description of the above technical solution:

[0022] The inner surface of the deflection frame is provided with a sliding groove, and the sliding block is located inside the sliding groove.

[0023] By adopting the above technical solution, the sliding groove can limit the movement of the sliding block.

[0024] As a further description of the above technical solution:

[0025] The lower surface of the workbench is fixedly connected with four legs.

[0026] By adopting the above technical solution, the support legs are used to support the worktable.

[0027] By employing the above technical solution, the present invention provides a large-diameter corrugated pipe rotational bending fatigue testing device with at least the following beneficial effects:

[0028] Compared with existing technologies, this large-diameter bellows rotational bending fatigue testing device utilizes a double-threaded screw, moving parts, deflection arms, and clamping plates. When the bellows needs to be fixed, the rotation of the double-threaded screw causes adjacent moving parts to move closer together, which in turn causes adjacent deflection arms to deflect, which in turn causes adjacent clamping plates to move away from each other. This allows the bellows to be clamped and fixed from the inside, preventing it from shaking during testing. In contrast, existing testing devices typically fix the bellows to the testing device with bolts, requiring bolt tightening for each installation and removal of the bellows, which wastes testing time and is not conducive to rotational bending fatigue testing. This large-diameter bellows rotational bending fatigue testing device can quickly clamp and fix the bellows, saving even more time. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of a large inner diameter bellows rotational bending fatigue testing device proposed in this utility model.

[0030] Figure 2 This is a cross-sectional view of the overall structure of a large inner diameter bellows rotational bending fatigue testing device proposed in this utility model.

[0031] Figure 3 This utility model proposes a rotary bending fatigue testing device for large-diameter corrugated pipes. Figure 2 Enlarged view of the structure at point A in the middle;

[0032] Figure 4 This utility model proposes a rotary bending fatigue testing device for large-diameter corrugated pipes. Figure 2 Enlarged view of the structure at point B;

[0033] Figure 5 This is a partial structural cross-sectional view of a large-diameter bellows rotational bending fatigue testing device proposed in this utility model.

[0034] Figure 6 This is a structural diagram of the mounting column for a large-diameter corrugated pipe rotational bending fatigue testing device proposed in this utility model.

[0035] Legend:

[0036] 1. Mounting bracket; 2. First connecting plate; 3. Clamping mechanism; 301. Mounting column; 302. Third motor; 303. Double threaded screw; 304. Moving part; 305. Connecting part; 306. Deflection arm; 307. Clamping plate; 308. Moving groove; 309. Limiting rod; 4. Worktable; 5. Deflection frame; 6. Sliding groove; 7. Sliding block; 8. Mounting base; 9. Mounting groove; 10. First motor; 11. First rotating shaft; 12. Second connecting plate; 13. Second motor; 14. Second rotating shaft; 15. Rotating arm; 16. Connecting arm; 17. Support leg. Detailed Implementation

[0037] Reference Figure 1-6 The present invention provides a large inner diameter corrugated pipe rotation bending fatigue testing device: including a workbench 4, a mounting frame 1 and a deflection frame 5 fixedly connected to the top of the workbench 4, a first connecting plate 2 fixedly connected to the inner wall of the mounting frame 1, a sliding block 7 slidably installed on the top of the deflection frame 5, and a clamping mechanism 3 installed on the opposite surfaces of the first connecting plate 2 and the sliding block 7.

[0038] The clamping mechanism 3 includes mounting posts 301, a double-threaded screw 303, moving parts 304, a deflection arm 306, and a clamping plate 307. There are two mounting posts 301, one fixedly connected to the bottom of the first connecting plate 2 and the other to the top of the sliding block 7. The double-threaded screw 303 is movably mounted inside the mounting posts 301. Two moving parts 304 are threadedly connected to the outer wall of the double-threaded screw 303. Four connecting parts 305 are fixedly connected to the side walls of the moving parts 304. The side walls of the connecting parts 305 are movably mounted... Equipped with a deflection arm 306, when it is necessary to fix the bellows, the double threaded screw 303 rotates, causing the adjacent moving parts 304 to move closer to each other, which in turn causes the adjacent deflection arms 306 to deflect, which in turn causes the adjacent clamping plates 307 to move away from each other, so that the bellows can be clamped and fixed from the inside of the bellows, preventing the bellows from shaking during testing. The clamping plate 307 is movably installed at the end of the deflection arm 306 away from the connector 305. The outer surface of the clamping plate 307 is coated with an aluminum oxide coating, which can greatly increase the friction between the clamping plate 307 and the bellows.

[0039] The top of the sliding block 7 is fixedly connected to a mounting base 8. The mounting base 8 has a mounting groove 9 inside. The bottom of the mounting groove 9 is fixedly connected to a first motor 10. The output end of the first motor 10 is fixedly connected to a first rotating shaft 11. The bottom of the mounting column 301 is fixedly connected to a second connecting plate 12. The end of the first rotating shaft 11 away from the first motor 10 is fixedly connected to the second connecting plate 12. When the first motor 10 works, it can drive the first rotating shaft 11 to rotate, which in turn can drive the second connecting plate 12 to rotate, which in turn can drive the lower clamping mechanism 3 to rotate, which in turn can drive the bellows to rotate, and the rotational fatigue of the bellows can be measured.

[0040] A third motor 302 is fixedly connected to the side wall of the mounting post 301. A double-threaded screw 303 is fixedly connected to the output end of the third motor 302. The upper third motor 302 is located inside the first connecting plate 2, and the lower third motor 302 is located inside the second connecting plate 12. The operation of the third motor 302 can drive the double-threaded screw 303 to rotate. A second motor 13 is fixedly connected to the side wall of the mounting bracket 1. A second rotating shaft 14 is fixedly connected to the output end of the second rotating shaft 14 away from the second motor 13. A rotating arm 15 is fixedly connected to the end of the second rotating shaft 14 away from the second motor 13. A connecting arm 16 is fixedly connected to the side wall of the rotating arm 15. The end of the connecting arm 16 away from the rotating arm 15 is fixedly connected to the outer wall of the sliding block 7. The operation of the second motor 13 drives the second rotating shaft 14 to rotate, thereby driving the rotating arm 15 and the connecting arm 16 to rotate around the second rotating shaft 14, thereby driving the sliding block 7 to rotate. The moving block 7 rotates around the second rotating shaft 14, which in turn drives the lower clamping mechanism 3 to rotate around the second rotating shaft 14, so that the corrugated pipe clamped between the two clamping mechanisms 3 can be bent, and the bending angle can be adjusted. The outer surface of the mounting column 301 is provided with a moving groove 308, and there are four moving grooves 308. The moving grooves 308 can provide moving space for the connector 305. The inner wall of the moving groove 308 is fixedly connected to a limiting rod 309. The outer surface of the limiting rod 309 is fitted with the connector 305. The limiting rod 309 can limit the movement of the connector 305. The inner surface of the deflection frame 5 is provided with a sliding groove 6. The sliding block 7 is located inside the sliding groove 6. The sliding groove 6 can limit the movement of the sliding block 7. The lower surface of the worktable 4 is fixedly connected with four support legs 17 to support the worktable 4.

[0041] Working principle: When the bellows needs to be fixed, the double threaded screw 303 rotates, causing the adjacent moving parts 304 to move closer to each other, which in turn causes the adjacent deflection arms 306 to deflect, which in turn causes the adjacent clamping plates 307 to move away from each other, thus clamping and fixing the bellows from the inside, preventing the bellows from shaking during testing. The first motor 10 works, which drives the first rotating shaft 11 to rotate, which in turn drives the second connecting plate 12 to rotate, which in turn drives the lower clamping mechanism 3 to rotate, which in turn drives the bellows to rotate, allowing the rotational fatigue of the bellows to be measured. The second motor 13 works, which drives the second rotating shaft 14 to rotate, which in turn drives the rotating arm 15 and the connecting arm 16 to rotate around the second rotating shaft 14, which in turn drives the sliding block 7 to rotate around the second rotating shaft 14, which in turn drives the lower clamping mechanism 3 to rotate around the second rotating shaft 14, so that the bellows clamped between the two clamping mechanisms 3 can be bent, and the bending angle can be adjusted.

[0042] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A large-diameter corrugated pipe rotational bending fatigue testing device, comprising a worktable (4), characterized in that: The top of the workbench (4) is fixedly connected to a mounting bracket (1) and a deflection bracket (5). The inner wall of the mounting bracket (1) is fixedly connected to a first connecting plate (2). A sliding block (7) is slidably installed on the top of the deflection bracket (5). Clamping mechanisms (3) are installed on the opposite surfaces of the first connecting plate (2) and the sliding block (7). The clamping mechanism (3) includes mounting posts (301), double-threaded screws (303), moving parts (304), deflection arms (306), and clamping plates (307). There are two mounting posts (301). The bottom of the first connecting plate (2) and the top of the sliding block (7) are both fixedly connected to the mounting posts (301). The double-threaded screws (303) are movably installed inside the mounting posts (301). The outer wall of the double-threaded screws (303) is threadedly connected to two moving parts (304). The side walls of the moving parts (304) are fixedly connected to four connecting parts (305). The side walls of the connecting parts (305) are movably installed with deflection arms (306). The end of the deflection arm (306) away from the connecting parts (305) is movably installed with the clamping plate (307). The top of the sliding block (7) is fixedly connected to a mounting base (8), and the mounting base (8) has an installation groove (9) inside. The bottom of the mounting groove (9) is fixedly connected to a first motor (10), and the output end of the first motor (10) is fixedly connected to a first rotating shaft (11). The bottom of the mounting column (301) is fixedly connected to a second connecting plate (12), and the end of the first rotating shaft (11) away from the first motor (10) is fixedly connected to the second connecting plate (12).

2. A large inside diameter bellows rotary bending fatigue test apparatus as defined in claim 1, wherein: A third motor (302) is fixedly connected to the side wall of the mounting column (301), and a double threaded screw (303) is fixedly connected to the output end of the third motor (302). The upper third motor (302) is located inside the first connecting plate (2), and the lower third motor (302) is located inside the second connecting plate (12).

3. A large inside diameter bellows rotary bending fatigue test apparatus as defined in claim 1 wherein: A second motor (13) is fixedly connected to the side wall of the mounting bracket (1). A second rotating shaft (14) is fixedly connected to the output end of the second motor (13). A rotating arm (15) is fixedly connected to the end of the second rotating shaft (14) away from the second motor (13). A connecting arm (16) is fixedly connected to the side wall of the rotating arm (15). The end of the connecting arm (16) away from the rotating arm (15) is fixedly connected to the outer wall of the sliding block (7).

4. A large inside diameter bellows rotary bending fatigue test apparatus as defined in claim 1 wherein: The outer surface of the mounting post (301) is provided with a movable groove (308), and the number of movable grooves (308) is four.

5. A large inside diameter bellows rotary bending fatigue test apparatus as defined in claim 4 wherein: A limiting rod (309) is fixedly connected to the inner wall of the moving groove (308), and a connector (305) is sleeved on the outer surface of the limiting rod (309).

6. A large inside diameter bellows rotary bending fatigue test apparatus as defined in claim 1 wherein: The inner surface of the deflection frame (5) is provided with a sliding groove (6), and the sliding block (7) is located inside the sliding groove (6).

7. A large inside diameter bellows rotary bending fatigue test apparatus as defined in claim 1 wherein: The lower surface of the workbench (4) is fixedly connected with four legs (17).

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