A pipe body bending test device

Abstract

The utility model relates to a kind of pipe body bending test device, including test unit, it includes installation platform, box and support frame, the box is oppositely arranged in the installation platform along first direction, the support frame is assembled in the box, and the measured piece is arranged in support frame along second direction, and the measured piece and the support frame rolling contact;Lifting unit, including lifting drive part and connecting rod, the lifting drive part is assembled in installation platform, the connecting rod is extended and is arranged along the first direction, the end of the connecting rod is slidably connected with the box respectively, the connecting rod is simultaneously connected in the movable end of the lifting drive part, to be lifted under the driving of the lifting drive part;The lowest point of the movement of the movable end of the lifting drive part is not higher than the support frame.The utility model can accurately, efficiently and reliably simulate the working condition when rubber tube 90 ° is bent, and multiple cycle tests are performed, to meet the high-frequency bending performance detection demand of oil gas recovery rubber tube.

Description

Technical Field

[0001] This utility model relates to the field of durability testing technology for fluid transport components, and in particular to a pipe bending test device. Background Technology

[0002] As an essential environmental protection device in gas stations and oil depots, the vapor recovery system is a key component connecting the fuel nozzle to the vehicle's fuel tank. While delivering fuel, it efficiently and securely recovers volatile oil vapors into the storage system. Because the vapor recovery hose undergoes frequent bending during use, it needs to possess oil resistance, airtightness, antistatic properties, and good mechanical durability. In actual operation, gas station attendants need to remove the fuel nozzle from the hanger, insert it into the vehicle's fuel tank, and then pull it out and put it back in. This series of actions causes the hose, especially the part near the fuel nozzle, to repeatedly experience near-90° bends. Long-term, high-frequency bending stress can cause microscopic fatigue cracks inside the hose material (usually a multi-layered composite rubber or rubber-plastic material). These cracks gradually propagate, eventually leading to the rupture of the outer rubber layer and perforation or cracking of the inner rubber layer in the oil and gas recovery hose. Furthermore, because bending stress is concentrated at the pipe joint, it may cause the joint to loosen or detach, resulting in environmental pollution and safety accidents. Therefore, the bending life of the hose directly determines the reliability, safety, and maintenance cost of the entire oil and gas recovery system. In existing technologies, hose performance testing mainly focuses on conventional physical properties (such as tensile strength and hardness), media resistance (oil resistance), and static pressure testing (burst pressure, leakage testing).

[0003] However, the shortcomings of existing technologies are that these static or quasi-static testing methods cannot effectively simulate and evaluate the lifespan of hoses under dynamic bending fatigue in actual use. In addition, the simulated working conditions for bending tests in existing technologies are not accurate enough. The bending angle and bending radius of existing testing equipment cannot accurately simulate the actual 90° bending state of the hose on the fuel dispenser side and fuel nozzle side during refueling operations. Furthermore, existing equipment is partially manual or semi-automatic, resulting in low testing efficiency. It is difficult to complete the verification of the hose's long lifespan (such as 500,000 cycles) within a reasonable time, which is time-consuming and labor-intensive, and the accuracy of the test results is poor. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a tube bending test device that can accurately, efficiently and reliably simulate the working condition of a hose bending at 90° and perform at least 500,000 cycle tests to meet the high-frequency bending performance testing requirements of oil and gas recovery hoses.

[0005] To solve the above-mentioned technical problems, this utility model provides a tube bending test device, comprising, The test unit includes a mounting platform, a housing, and a support frame. The housing is disposed opposite to the mounting platform along a first direction, the support frame is assembled to the housing, and the test piece is disposed on the support frame along a second direction, and the test piece is in rolling contact with the support frame. The lifting unit includes a lifting drive component and a connecting rod. The lifting drive component is assembled on the mounting platform. The connecting rod extends along the first direction and its ends are slidably connected to the housing. The connecting rod is also connected to the movable end of the lifting drive component so as to lift and lower under the drive of the lifting drive component. The lowest point of the movable end of the lifting drive component is not higher than the support frame. The control unit is communicatively connected to the lifting unit to output control signals to the lifting unit.

[0006] In one embodiment of the present invention, a counterweight unit is further included, the counterweight unit comprising at least one set of counterweight blocks; during testing, at least one set of the counterweight blocks is respectively connected to both ends of the test piece.

[0007] In one embodiment of the present invention, at least one set of rolling connectors are provided on the support frame at intervals along the first direction.

[0008] In one embodiment of this utility model, each set of rolling connectors includes a first roller and a second roller disposed opposite to each other on the support frame along the second direction; the test piece is rolledly connected to the first roller and the second roller respectively.

[0009] In one embodiment of this utility model, four sets of rolling connectors are evenly spaced along the first direction on the support frame.

[0010] In one embodiment of this utility model, the connecting rod is provided with a supporting roller, the supporting roller is rotatably connected to the connecting rod, and the connecting rod abuts against the test piece through the supporting roller.

[0011] In one embodiment of this utility model, the number of supporting rollers is configured to be consistent with the number of the test piece.

[0012] In one embodiment of this utility model, the driving unit further includes a magnetic ring sensor, which is connected to the lifting driving component to monitor whether the bending angle of the test component meets the requirements.

[0013] In one embodiment of this utility model, a counter is further included. The counter is communicatively connected to the drive unit and the control unit to record the number of bends and upload the data to the control unit.

[0014] In one embodiment of this utility model, the box body is provided with a guide rail, the guide rail extends along the height direction, a slider is slidably disposed on the guide rail, and the end of the connecting rod is connected to the slider.

[0015] The above-mentioned technical solution of this utility model has the following advantages compared with the prior art: This utility model discloses a pipe bending test device, comprising a test unit, a drive unit, and a control unit. The test unit includes a mounting platform, a housing, and a support frame. The housings are arranged opposite each other, and the support frame is mounted on the housing to provide support for the test piece. The drive unit includes a lifting drive component and a connecting rod. The connecting rod can drive the test piece to rise and fall under the drive of the lifting drive component, thereby cooperating with the support frame to achieve the bending test. This utility model can accurately, efficiently, and reliably simulate the working condition of the test hose when it is bent at 90°, and perform multiple cyclic tests (500,000 times or more) to meet the performance testing requirements of high-frequency bending of oil and gas recovery hoses. This invention can effectively improve testing efficiency, reduce manpower input, realize automated testing, and has good consistency of test results. The accuracy of the test results of this invention is also greatly improved. Attached Figure Description

[0016] To make the content of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure of the tube bending test device according to a preferred embodiment of the present invention.

[0018] Figure 2 yes Figure 1 The main view.

[0019] Figure 3 This is a schematic diagram showing the cooperation between the support frame, connecting rod, and test piece in a preferred embodiment of this utility model.

[0020] Explanation of reference numerals in the accompanying drawings: 10, Test piece; 1, Mounting platform; 2, Housing; 3, Support frame; 30, Rolling connector; 301, First roller; 302, Second roller; 40, Lifting drive component; 41, Connecting rod; 5, Counterweight unit. Detailed Implementation

[0021] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, so that those skilled in the art can better understand and implement the present invention. However, the embodiments are not intended to limit the present invention.

[0022] Reference Figures 1 to 3 As shown, this utility model discloses a tube bending test device for performing bending tests on the test piece 10.

[0023] In this embodiment, the test piece 10 is an oil and gas recovery hose. Of course, in other embodiments, the test piece 10 can also be other types of tubing.

[0024] Specifically, the tube bending test device includes a test unit, which includes an installation platform 1, a housing 2, and a support frame 3. There are two housings 2, which are arranged opposite to each other on the installation platform 1 along a first direction.

[0025] The support frame 3 is assembled to the housing 2 at both ends along the first direction by fasteners, and the support frame 3 is arranged in the horizontal direction; during testing, the test piece 10 is arranged on the support frame 3 along the second direction, and the test piece 10 is in rolling contact with the support frame 3.

[0026] It should be noted that the second direction is perpendicular to the first direction.

[0027] The tube bending test device also includes a lifting unit, which includes a lifting drive component 40 and a connecting rod 41. The lifting drive component 40 is assembled on the mounting platform 1, and the connecting rod 41 extends along the first direction. The ends of the connecting rod 41 are slidably connected to the housing 2, and the middle part of the connecting rod 41 is simultaneously connected to the movable end of the lifting drive component 40, so that the connecting rod 41 can be raised and lowered under the drive of the lifting drive component 40. It should be noted that the lowest point of the moving end of the lifting drive component 40 is not higher than the support frame 3. This setting ensures that the lowest position of the connecting rod 41 is not higher than the support frame 3. When the connecting rod 41 is lowered to its lowest position, it will not exert any force on the test piece 10, thereby enabling the test piece 10 to fold 90° in conjunction with the support frame 3, ensuring the consistency and accuracy of the folding angle of the test piece 10.

[0028] The tube bending test device also includes a control unit, which is communicatively connected to the lifting unit to output control signals to the lifting unit and control the lifting drive component 40 to operate.

[0029] During testing, the test piece 10 is required to withstand a force of 4 kg when bent. Therefore, a force of 2 kg is applied to both ends of the test piece 10 to ensure balanced force on both sides. Of course, the force applied to both ends of the test piece 10 can be adjusted to suit different testing requirements.

[0030] During the test, the lifting drive component 40 is controlled to move, driving the connecting rod 41 to rise and fall, which in turn drives the test piece 10 to rise and fall. The rise and fall of the lifting drive component 40 constitutes one cycle, that is, when the lifting drive component 40 completes one rise and fall, it is considered as performing one bending test. When the connecting rod 41 drives the test piece 10 to rise, the test piece 10 is not bent. When the connecting rod 41 is lowered to the lowest position, the test piece 10 abuts against the support frame 3, achieving a 90° bend.

[0031] Therefore, it can be seen that the pipe bending test device protected by this utility model is provided with a test unit, a drive unit, and a control unit. The test unit includes a mounting platform, a housing, and a support frame. The housings are arranged opposite each other, and the support frame is assembled on the housing to provide support for the test piece. The drive unit includes a lifting drive component and a connecting rod. The connecting rod can drive the test piece to rise and fall under the drive of the lifting drive component to cooperate with the support frame to realize the bending test. This utility model can accurately, efficiently, and reliably simulate the working condition of the test hose when it is bent at 90° and perform multiple cyclic tests (500,000 times or more) to meet the performance testing requirements of high-frequency bending of oil and gas recovery hoses. This invention can effectively improve the testing efficiency, reduce manpower input, realize automated testing, and the consistency of the test results is good. The accuracy of the test results of this invention is also greatly improved.

[0032] In one preferred embodiment, the lifting drive component 40 includes, but is not limited to, a drive cylinder.

[0033] Furthermore, for ease of testing, the tube bending test device also includes a counterweight unit 5, which comprises at least one set of counterweights. During testing, at least one set of counterweights is connected to both ends of the test piece. In this embodiment, each set of counterweights includes two identical 2kg counterweights, thereby enabling the overall bending force of the test piece 10 to be 4kg. The two counterweights are connected to both ends of the test piece 10 via connecting lines.

[0034] Preferably, the counterweight can be a weight.

[0035] Furthermore, the support frame 3 is provided with at least one set of rolling connectors 30 spaced apart along the first direction.

[0036] In detail, each set of rolling connectors 30 includes a first roller 301 and a second roller 302 disposed opposite to each other on the support frame 3 along the second direction; after the end of the test piece 10 is connected to the counterweight, it makes rolling contact with the first roller 301 and the second roller 302 respectively.

[0037] In a preferred embodiment, four sets of rolling connectors 30 are evenly spaced along the first direction on the support frame 3.

[0038] Furthermore, the connecting rod 41 is also provided with a supporting roller 410, which is coaxially rotatably connected to the connecting rod 41. During testing, when the connecting rod 41 rises and falls under the drive of the lifting drive component 40, the connecting rod 41 abuts against the test piece 10 through the supporting roller 410. The supporting roller 410 is adapted to the test piece 10.

[0039] In a preferred embodiment, the number of supporting rollers 410 is configured to match the number of test pieces 10. In this embodiment, four test pieces 10 are tested simultaneously, therefore, four supporting rollers 410 are provided accordingly.

[0040] Preferably, the drive unit further includes a magnetic ring sensor connected to the drive cylinder to monitor whether the drive cylinder is in position, thereby monitoring whether the bending angle of the test piece 10 meets the requirements (reaching a 90° bend). If the drive cylinder is detected to be not in position, an alarm signal is output to the control unit to ensure test accuracy.

[0041] In a preferred embodiment, a counter is also included. The counter is communicatively connected to the drive unit and the control unit to record the number of bends and upload the data to the control unit. Specifically, the counting action of the counter is triggered by the lifting and lowering action of the drive cylinder. Each bending cycle (one lifting and lowering of the counterweight) automatically increments the counter by 1, recording the number of tests in real time.

[0042] To further ensure the lifting stability of the connecting rod 41 and to guide and limit the movement trajectory of the connecting rod 41, each of the housings 2 is provided with a guide rail 20, which extends along the height direction. A slider is slidably mounted on the guide rail 20, and the end of the connecting rod 41 is fixedly connected to the slider.

[0043] It should be noted that the guide rails 20 located in the two boxes are symmetrically arranged along the first direction.

[0044] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0046] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A tube bending test device, characterized in that: include, The test unit includes a mounting platform, a housing, and a support frame. The housing is disposed opposite to the mounting platform along a first direction, the support frame is assembled to the housing, and the test piece is disposed on the support frame along a second direction, and the test piece is in rolling contact with the support frame. The lifting unit includes a lifting drive component and a connecting rod. The lifting drive component is assembled on the mounting platform. The connecting rod extends along the first direction and its ends are slidably connected to the housing. The connecting rod is also connected to the movable end of the lifting drive component so as to lift and lower under the drive of the lifting drive component. The lowest point of the movable end of the lifting drive component is not higher than the support frame. The control unit is communicatively connected to the lifting unit to output control signals to the lifting unit.

2. The tube bending test device according to claim 1, characterized in that: It also includes a counterweight unit, which includes at least one set of counterweight blocks; during testing, at least one set of the counterweight blocks is respectively connected to both ends of the test piece.

3. The tube bending test device according to claim 1, characterized in that: The support frame is provided with at least one set of rolling connectors spaced apart along the first direction.

4. The tube bending test device according to claim 3, characterized in that: Each set of rolling connectors includes a first roller and a second roller disposed opposite to each other on the support frame along the second direction; the test piece is rolledly connected to the first roller and the second roller respectively.

5. The tube bending test device according to claim 3, characterized in that: The support frame is provided with four sets of rolling connectors evenly spaced along the first direction.

6. The tube bending test device according to claim 1, characterized in that: The connecting rod is provided with a supporting roller, which is rotatably connected to the connecting rod, and the connecting rod abuts against the test piece through the supporting roller.

7. The tube bending test device according to claim 6, characterized in that: The number of supporting rollers is configured to be the same as the number of the test piece.

8. The tube bending test device according to claim 1, characterized in that: The drive unit also includes a magnetic ring sensor, which is connected to the lifting drive component to monitor whether the bending angle of the test component meets the requirements.

9. The tube bending test device according to claim 1, characterized in that: It also includes a counter, which is communicatively connected to the drive unit and the control unit to record the number of bends and upload the data to the control unit.

10. A tube bending test device according to any one of claims 1-9, characterized in that: The housing is provided with a guide rail that extends along the height direction. A slider is slidably mounted on the guide rail, and the end of the connecting rod is connected to the slider.

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