Pipeline fatigue test device

Abstract

The utility model relates to a pipeline fatigue test device, which belongs to the technical field of pipeline fatigue test and comprises a support frame, a mounting frame is fixed on the upper surface of the support frame, a first electric push rod is fixed in the middle of the left side wall of an inner cavity of the mounting frame, and a movable plate is fixed on an output shaft of the first electric push rod. Clamping mechanisms used for fixing pipelines with different diameters are arranged on the sides, opposite to the right side wall of the inner cavity of the mounting frame, of the movable plate, a loading mechanism used for applying alternating loads to the pipelines is arranged on the upper surface of the supporting frame, and a control panel is fixed to the left end of the front face of the supporting frame. According to the pipeline fatigue test device, through mutual cooperation of the positioning block, the double-shaft motor, the threaded rod, the moving plate, the connecting rod, the clamping plate and the through hole, pipelines with different diameters can be stably clamped and fixed, the operation difficulty of workers is reduced, the clamping efficiency of the pipelines is greatly improved, and the pipelines can be rapidly detected.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline fatigue testing, in particular to a pipeline fatigue testing device. Background Art

[0002] In the process of municipal construction, pipelines are important infrastructures, and their quality and safety are of vital importance. In order to ensure the reliability of pipelines during use, fatigue tests are usually required. By performing fatigue tests on pipes, the life and failure mode of pipes under alternating stress can be determined, providing an important reference for engineering applications.

[0003] Through searching, it is found that Chinese patent announcement number: CN218212291U discloses a full-size fatigue test device for glass fiber reinforced plastic pipes, including a base plate, a hydraulic cylinder is fixedly installed on the left end of the base plate, a transmission body is connected to the upper end of the hydraulic cylinder, a rotating shaft is movably connected to the right end of the transmission body, a fixed block is fixedly installed on the upper end of the base plate, a limiting block is movably engaged in the middle of the fixed block, a limiting shaft is fixedly installed on the left end of the rotating shaft, and a fixed shaft is movably engaged in the middle of the limiting shaft. The utility model disconnects the connection between the second limiting body and the rotating shaft by pulling the second limiting body forward, and then moves the rotating shaft to a position of a suitable steel pipe length, and then pulls the first limiting body to the left to disconnect the first limiting body and the fixed shaft, and then adjusts the position of the fixed shaft according to the diameter of the steel pipe so that the fixed shaft is at the position of the steel pipe inside the steel pipe, thereby making the device more practical. However, the pipeline fatigue test device has the characteristics of complex structure and cumbersome operation, which increases the difficulty of operation and reduces the practicality. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a pipeline fatigue testing device having the advantages of low operating difficulty, etc., which solves the problems of the pipeline fatigue testing device having a complex structure and cumbersome operation, which increases the operating difficulty and reduces the practicality.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pipeline fatigue test device, comprising a support frame, a mounting frame is fixed on the upper surface of the support frame, a No. 1 electric push rod is fixed to the middle of the left side wall of the inner cavity of the mounting frame, a movable plate is fixed to the output shaft of the No. 1 electric push rod, a clamping mechanism for fixing pipelines of different diameters is provided on the side of the movable plate opposite to the right side wall of the inner cavity of the mounting frame, a loading mechanism for applying an alternating load to the pipeline is provided on the upper surface of the support frame, and a control panel for controlling the working state of the loading mechanism is fixed to the left end of the front side of the support frame;

[0006] The clamping mechanism includes a positioning block, a dual-axis motor, two threaded rods, two movable plates, four connecting rods and two clamping plates. The positioning block is fixed to the right side of the movable plate and the right side wall of the inner cavity of the mounting frame. The dual-axis motor is fixed at the center of the inner front wall of the positioning block. The two threaded rods are respectively fixed to the two output shafts of the dual-axis motor. The movable plate is threadedly connected to the threaded rods. One side of the connecting rod is fixed to the movable plate. Through holes are provided at the left and right ends of the inner top wall and the inner bottom wall of the positioning block. The connecting rod passes through the through hole on the side away from the movable plate and extends to the upper or lower side of the through hole and is fixedly connected to the clamping plate.

[0007] By adopting this technical solution, pipes of different diameters can be stably clamped and fixed, which reduces the operating difficulty of the staff, greatly improves the clamping efficiency of the pipes, and enables rapid inspection of the pipes.

[0008] Furthermore, the cross-sectional shape of the mounting frame is U-shaped, and telescopic rods are fixed to the upper and lower ends between the movable plate and the opposite side of the left side wall of the inner cavity of the mounting frame.

[0009] By adopting this technical solution, the movement of the movable plate can be limited by the arranged telescopic rod.

[0010] Furthermore, a slide groove is provided at the left end of the inner bottom wall of the mounting frame, and the bottom of the movable plate performs horizontal linear motion in the inner cavity of the slide groove.

[0011] By adopting this technical solution, the movement of the movable plate is further limited by the provided sliding groove.

[0012] Furthermore, the positioning block is in the shape of a cylinder with a hollow interior and partially missing upper and lower ends, and the threaded rod is rotatably connected to the side opposite to the inner wall of the positioning block via a bearing.

[0013] Furthermore, the two movable plates are symmetrically distributed at the left and right ends of the horizontal central axis of the dual-axis motor, and limiting grooves are provided on the opposite sides of the left and right side walls of the inner cavity of the positioning block, and the movable plates perform linear up and down motion in the inner cavity of the limiting grooves.

[0014] By adopting this technical solution, the purpose of limiting the movement of the movable plate is achieved by setting the limiting groove.

[0015] Furthermore, the two connecting rods are symmetrically distributed at the left and right ends of the vertical center axis of the card plate, and anti-skid pads are fixed on the opposite sides of the two card plates. The anti-skid pads are rubber pads, and the cross-sectional shape of the card plate is arc-shaped.

[0016] By adopting this technical solution, the friction between the clamping plate and the inner wall of the pipeline can be increased by providing an anti-slip pad.

[0017] Furthermore, the loading mechanism includes a load-bearing frame fixed on the upper surface of the support frame, a No. 2 electric push rod is fixed to the middle of the inner top wall of the load-bearing frame, a driving plate is fixed to the output shaft of the No. 2 electric push rod, and an extrusion plate is fixed to the lower surface of the driving plate.

[0018] By adopting this technical solution, rapid and accurate detection of pipeline fatigue performance can be achieved, improving construction quality and safety.

[0019] Furthermore, limiting strips are fixed on opposite sides of the left and right side walls of the inner cavity of the load-bearing frame, and the left and right ends of the driving plate perform linear up and down motions in the inner cavity of the limiting strips.

[0020] By adopting this technical solution, the movement of the driving plate can be limited by the provided limiting strip.

[0021] Compared with the prior art, the technical solution of this application has the following beneficial effects:

[0022] 1. The pipeline fatigue test device can stably clamp and fix pipelines of different diameters by setting the positioning block, the dual-axis motor, the threaded rod, the moving plate, the connecting rod, the clamping plate and the through hole, which reduces the operating difficulty of the staff, greatly improves the clamping efficiency of the pipeline, and can quickly detect the pipeline.

[0023] 2. The pipeline fatigue test device controls the No. 2 electric push rod through the control panel. The output shaft of the No. 2 electric push rod pushes the driving plate to move downward. The movement of the driving plate can drive the extrusion plate to move downward, so that the extrusion plate fits the pipeline and continues to apply alternating loads, thereby realizing rapid and accurate detection of pipeline fatigue performance and improving construction quality and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the structure of the utility model;

[0025] Figure 2 This is a schematic diagram of the structure of the clamping mechanism of the utility model;

[0026] Figure 3 This is a schematic diagram of the positioning block structure of the utility model;

[0027] Figure 4 It is a schematic diagram of the loading mechanism structure of the utility model.

[0028] In the figure: 1. Support frame; 2. Mounting frame; 3. Electric push rod No. 1; 4. Movable plate; 5. Clamping mechanism; 51. Positioning block; 52. Dual-axis motor; 53. Threaded rod; 54. Moving plate; 55. Connecting rod; 56. Clamping plate; 57. Through hole; 6. Loading mechanism; 61. Load-bearing frame; 62. Electric push rod No. 2; 63. Driving plate; 64. Extrusion plate; 7. Control panel. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] See also Figure 1 The pipeline fatigue test device in this embodiment includes a support frame 1, a mounting frame 2 is fixed on the upper surface of the support frame 1, a No. 1 electric push rod 3 is fixed to the middle of the left side wall of the inner cavity of the mounting frame 2, a movable plate 4 is fixed to the output shaft of the No. 1 electric push rod 3, and a clamping mechanism 5 for fixing pipelines of different diameters is provided on the side opposite to the right side wall of the inner cavity of the mounting frame 2. A loading mechanism 6 for applying an alternating load to the pipeline is provided on the upper surface of the support frame 1, and a control panel 7 for controlling the working state of the loading mechanism 6 is fixed to the left end of the front side of the support frame 1.

[0031] In this embodiment, the cross-sectional shape of the mounting frame 2 is U-shaped, telescopic rods are fixed at the upper and lower ends between the movable plate 4 and the opposite side of the left side wall of the inner cavity of the mounting frame 2, a slide groove is provided at the left end of the inner bottom wall of the mounting frame 2, and the bottom of the movable plate 4 performs horizontal linear motion in the inner cavity of the slide groove.

[0032] It can be understood that when the No. 1 electric push rod 3 is started, the output shaft of the No. 1 electric push rod 3 moves rightward, thereby causing the bottom of the movable plate 4 to move rightward in the slide groove, causing the telescopic rod to extend, thereby limiting the movement of the movable plate 4.

[0033] See also Figure 2-3In order to clamp and fix pipes of different diameters, the clamping mechanism 5 in this embodiment includes a positioning block 51, a dual-axis motor 52, two threaded rods 53, two movable plates 54, four connecting rods 55 and two clamping plates 56. The positioning block 51 is fixed to the right side of the movable plate 4 and the right side wall of the inner cavity of the mounting frame 2. The pipe is placed on the mounting frame 2, and the right side of the pipe is clamped into the outer side of the right positioning block 51, and the movable plate 4 is pushed to move rightward by the No. 1 electric push rod 3, so that the left end positioning block 51 is clamped into the left side of the pipe, and the pipe is stably clamped by the movable plate 4 and the mounting frame 2. The dual-axis motor 52 is fixed at the center of the inner positive wall of the positioning block 51, and the two threaded rods 53 are respectively fixed to the two output shafts of the dual-axis motor 52. The movable plate 54 and the mounting frame 2 are fixed to the center of the inner positive wall of the positioning block 51. The two threaded rods 53 are respectively fixed to the two output shafts of the dual-axis motor 52. The movable plate 54 and the mounting frame 2 are fixed to the center of the inner positive wall of the dual-axis motor 52. The movable plate 54 and the mounting frame 2 are fixed to the center of the inner positive wall of the dual-axis motor 52. The two threaded rods 53 are respectively fixed to the two output shafts ... The threaded rods 53 are threadedly connected, and the dual-axis motor 52 is started. The output shaft of the dual-axis motor 52 rotates, thereby driving the threaded rods 53 to rotate. The rotation of the two threaded rods 53 causes the movable plate 54 threadedly connected to its surface to move. One side of the connecting rod 55 is fixed to the movable plate 4. Through holes 57 are provided on the left and right ends of the inner top wall and the inner bottom wall of the positioning block 51. The side of the connecting rod 55 away from the movable plate 54 passes through the through hole 57 and extends to the upper or lower side of the through hole 57 and is fixedly connected to the clamping plate 56. The back-to-back movement of the two movable plates 54 can drive the upper and lower connecting rods 55 to move back-to-back in the inner cavity of the through hole 57, thereby moving the clamping plate 56, and then enabling the two clamping plates 56 to fit against the inner wall of the pipe, so that pipes of different diameters can be fixed.

[0034] In this embodiment, the positioning block 51 is shaped like a cylinder with a hollow interior and partially missing at both ends. The threaded rod 53 is rotatably connected to the opposite side of the inner wall of the positioning block 51 through a bearing. The two movable plates 54 are symmetrically distributed on the left and right ends of the horizontal center axis of the dual-axis motor 52. Limiting grooves are provided on the opposite sides of the left and right side walls of the inner cavity of the positioning block 51, and the movable plate 54 makes up and down linear motion in the inner cavity of the limiting groove.

[0035] The two connecting rods 55 are symmetrically distributed at the left and right ends of the vertical center axis of the clamping plate 56 . Anti-skid pads are fixed on the opposite sides of the two clamping plates 56 . The anti-skid pads are rubber pads. The cross-section of the clamping plate 56 is arc-shaped.

[0036] It should be noted that by simplifying the structure of the clamping mechanism 5 , the operating difficulty and maintenance cost are reduced, and the clamping efficiency of the pipeline is greatly improved.

[0037] See also Figure 4In order to quickly detect the fatigue performance of the pipeline, the loading mechanism 6 in this embodiment includes a load-bearing frame 61 fixed on the upper surface of the support frame 1, and a No. 2 electric push rod 62 is fixed to the middle of the inner top wall of the load-bearing frame 61. The output shaft of the No. 2 electric push rod 62 is fixed to a driving plate 63, and the lower surface of the driving plate 63 is fixed to an extrusion plate 64. The No. 2 electric push rod 62 is controlled by the control panel 7, and the output shaft of the No. 2 electric push rod 62 pushes the driving plate 63 to move downward, so that the two ends of the driving plate 63 move downward in the inner cavity of the limit strip. The movement of the driving plate 63 can drive the extrusion plate 64 to move downward, so that the extrusion plate 64 fits with the pipeline and continues to apply force. If the pipeline surface is deformed, the test result is unqualified, otherwise it is qualified.

[0038] In this embodiment, limit bars are fixed on opposite sides of the left and right side walls of the inner cavity of the load-bearing frame 61, and the left and right ends of the driving plate 63 both make linear up and down motions in the inner cavity of the limit bars.

[0039] It should be noted that the control panel 7 and the second electric push rod 62 are electrically connected via a wire.

[0040] The working principle of the above embodiment is:

[0041] (1) When performing fatigue test on the pipeline, first place the pipeline on the mounting frame 2, and make the right side of the pipeline be stuck in the outer side of the right positioning block 51, then start the No. 1 electric push rod 3, the output shaft of the No. 1 electric push rod 3 moves to the right, and then the bottom of the movable plate 4 moves to the right in the slide groove, so that the telescopic rod is extended, and then the movement of the movable plate 4 can be limited, so that the left positioning block 51 can be stuck in the left side of the pipeline, and the pipeline can be fixed by the movable plate 4 and the mounting frame 2, and then start the double-axis motor 52, the output shaft of the double-axis motor 52 rotates, and then drives the threaded rod 53 to rotate, and the rotation of the two threaded rods 53 causes the movable plate 54 threadedly connected on its surface to move. At this time, the movable plate 54 can only move linearly due to the setting of the limiting groove. The two movable plates 54 move away from each other, which can drive the upper and lower connecting rods 55 to move away from each other in the inner cavity of the through hole 57, thereby moving the clamping plate 56, and then the two clamping plates 56 can fit with the inner wall of the pipeline, so that pipelines of different diameters can be fixed.

[0042] (2) Then, the control panel 7 is used to control the No. 2 electric push rod 62. The output shaft of the No. 2 electric push rod 62 pushes the driving plate 63 to move downward, so that the two ends of the driving plate 63 move downward in the inner cavity of the limit strip. The movement of the driving plate 63 can drive the extrusion plate 64 to move downward, so that the extrusion plate 64 fits the pipe and continues to apply force. If the pipe surface is deformed, the test result is unqualified, otherwise it is qualified.

Claims

1. A pipeline fatigue test device, comprising a support frame (1), characterized in that: The upper surface of the support frame (1) is fixed with a mounting frame (2), a No. 1 electric push rod (3) is fixed to the middle of the left side wall of the inner cavity of the mounting frame (2), a movable plate (4) is fixed to the output shaft of the No. 1 electric push rod (3), a clamping mechanism (5) for fixing pipes of different diameters is provided on the side of the movable plate (4) opposite to the right side wall of the inner cavity of the mounting frame (2), a loading mechanism (6) for applying an alternating load to the pipe is provided on the upper surface of the support frame (1), and a control panel (7) for controlling the working state of the loading mechanism (6) is fixed to the left end of the front face of the support frame (1); The clamping mechanism (5) comprises a positioning block (51), a dual-axis motor (52), two threaded rods (53), two movable plates (54), four connecting rods (55) and two clamping plates (56). The positioning block (51) is fixed to the right side of the movable plate (4) and the right side wall of the inner cavity of the mounting frame (2). The dual-axis motor (52) is fixed to the center of the inner front wall of the positioning block (51). The two threaded rods (53) are respectively fixed to the two output shafts of the dual-axis motor (52). The movable plate (54) and the threaded rods (53) are threadedly connected. One side of the connecting rod (55) is fixed to the movable plate (54). Through holes (57) are provided at both left and right ends of the inner top wall and the inner bottom wall of the positioning block (51). The side of the connecting rod (55) away from the movable plate (54) passes through the through hole (57) and extends to the upper side or the lower side of the through hole (57) and is fixedly connected to the clamping plate (56).

2. The pipeline fatigue testing device according to claim 1, characterized in that: The cross-sectional shape of the mounting frame (2) is U-shaped, and telescopic rods are fixed to the upper and lower ends of the movable plate (4) and the opposite side of the left side wall of the inner cavity of the mounting frame (2).

3. The pipeline fatigue testing device according to claim 1, characterized in that: A slide groove is provided at the left end of the inner bottom wall of the mounting frame (2), and the bottom of the movable plate (4) performs horizontal linear motion in the inner cavity of the slide groove.

4. The pipeline fatigue testing device according to claim 1, characterized in that: The positioning block (51) is in the shape of a cylinder with a hollow interior and partially missing at both ends. The threaded rod (53) is rotatably connected to the side opposite to the inner wall of the positioning block (51) via a bearing.

5. The pipeline fatigue testing device according to claim 1, characterized in that: The two movable plates (4) are symmetrically distributed at the left and right ends of the transverse central axis of the dual-axis motor (52), and limiting grooves are provided on opposite sides of the left and right side walls of the inner cavity of the positioning block (51), and the movable plate (54) performs up and down linear movement in the inner cavity of the limiting groove.

6. The pipeline fatigue testing device according to claim 1, characterized in that: The two connecting rods (55) are symmetrically distributed at the left and right ends of the vertical center axis of the card plate (56). Anti-skid pads are fixed on opposite sides of the two card plates (56), and the anti-skid pads are rubber pads. The cross-section of the card plate (56) is arc-shaped.

7. The pipeline fatigue testing device according to claim 1, characterized in that: The loading mechanism (6) comprises a load-bearing frame (61) fixed to the upper surface of the support frame (1), a No. 2 electric push rod (62) being fixed to the middle of the inner top wall of the load-bearing frame (61), a driving plate (63) being fixed to the output shaft of the No. 2 electric push rod (62), and a pressing plate (64) being fixed to the lower surface of the driving plate (63).

8. The pipeline fatigue testing device according to claim 7, characterized in that: Limiting strips are fixed on opposite sides of the left and right side walls of the inner cavity of the load-bearing frame (61), and the left and right ends of the driving plate (63) both perform linear up and down motion in the inner cavity of the limiting strips.

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