Hydraulic servo pulse test system for high and low temperature humid and hot environment vibration resistance of automobile pipeline

Abstract

The invention relates to the technical field of automobile pipeline testing, and discloses an automobile pipeline vibration hydraulic servo pulse testing system resistant to high and low temperature humid and hot environments, which comprises a hydraulic water pulse instrument, a clamping assembly for clamping a pipeline, a rotary displacement assembly and a cross oscillation assembly. According to the cross oscillation assembly, a non-vertical and non-same-plane knocking mode is adopted, and the knocking force can uniformly and comprehensively cover the surface of the pipeline in combination with the rotary motion of the knocking rod around the pipeline, so that a detection blind area is avoided, and the detection integrity is ensured. The knocking forces in different directions generate various stress distributions and vibration modes in the pipeline, so that the vibration of the pipeline in various modes can be excited, various defects in different directions can be detected, and the defect detection capability is improved. As the knocking points are located on the two sides of the pipeline and are non-vertically knocked up and down, vibration generated by the two knocking points is overlapped and interfered with each other, the overall vibration of the pipeline is more complex and uniform, interference of local factors on a detection result is reduced, and the detection accuracy and reliability are improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive pipeline testing, and specifically relates to a vibration hydraulic servo pulse test system for automotive pipelines in high and low temperature and humid environments. Background Art

[0002] In the automotive industry, the reliability of automotive pipelines is crucial for the performance and safety of the entire vehicle. During actual use, automotive pipelines need to withstand complex working conditions, including high and low temperatures, humid environments, and various vibrations and hydraulic pulses.

[0003] Among them, hydraulic water pulse meters usually include the following several types of sensors:

[0004] Pressure sensor: It is used to monitor the size and change of pressure pulses in the hydraulic circuit in real time. It can convert liquid pressure into an electrical signal for the instrument to measure and analyze. According to the measurement principle and structural characteristics, pressure sensors can be further divided into piezoelectric, force-sensitive, capacitive, impedance, and other types. For example, piezoelectric pressure sensors use piezoelectric crystals to convert pressure signals into electrical signals, and have the advantages of high sensitivity, fast response speed, and small volume.

[0005] Flow sensor: It can measure the flow rate of hydraulic water in the pipeline. A common one is the turbine flowmeter. When the measured fluid flows through the sensor, the impeller rotates under the action of the fluid, and its rotation speed is proportional to the average flow velocity in the pipeline. The rotation of the impeller periodically changes the magnetic resistance value of the magnetoelectric converter, and the magnetic flux in the detection coil changes periodically, generating a periodic induced electromotive force, that is, an electrical pulse signal. After being amplified by the amplifier, it is sent to the display instrument for display.

[0006] Displacement sensor: It is used to detect the expansion, deformation, or displacement of the test piece under the action of pressure pulses. Usually, a non-contact measurement method is adopted, such as a laser displacement sensor or a capacitive displacement sensor, to avoid interference with the test process. For example, a laser displacement sensor calculates the displacement change of an object by emitting a laser beam and measuring the time it takes for the laser to reflect back.

[0007] Temperature sensor: During the operation of the hydraulic system, the temperature of the hydraulic oil may change. The temperature sensor is used to monitor the temperature of the hydraulic oil to ensure that the system operates within a suitable temperature range and prevent the system performance and test results from being affected by too high or too low temperatures. Common temperature sensors include thermocouples, thermal resistors, etc. Thermocouples work based on the thermoelectric effect principle. A closed loop is composed of two conductors of different materials. When there is a temperature difference at both ends, a thermoelectric potential will be generated in the loop, and the temperature change is reflected by measuring the thermoelectric potential.

[0008] At present, there are many deficiencies in the detection and test technology for automotive pipelines. Traditional detection methods mostly use single-point vertical percussion. This method cannot make the percussion force evenly and comprehensively cover the pipeline surface, easily forming detection blind spots and making it difficult to ensure the integrity of detection. Due to the single percussion direction, the stress distribution and vibration mode generated in the pipeline are also relatively single, only able to excite the vibration of the pipeline in a limited mode, with limited detection ability for various defects in different directions, resulting in many potential defects not being discovered in time; moreover, traditional single-point vertical percussion cannot utilize the vibration superposition and interference effects of multiple percussion points. The overall vibration of the pipeline is not complex and uniform enough, and local factors (such as uneven local pipeline materials, installation position differences, etc.) have a greater interference on the test results, easily causing misjudgment of defects and greatly reducing the accuracy and reliability of detection.

[0009] In view of this, the present invention is specifically proposed. Summary of the Invention

[0010] To solve the above technical problems, the basic concept of the technical solution adopted by the present invention is:

[0011] An automotive pipeline vibration hydraulic servo pulse test system for high and low temperature and humidity environments includes a hydraulic water pulse instrument and a clamping component for clamping the pipeline.

[0012] A rotation and displacement component is installed on the hydraulic water pulse instrument. The rotation and displacement component includes a positioning sleeve with internal threads and a sleeve ring with external threads. The sleeve ring is screwed inside the positioning sleeve, and the sleeve ring is sleeved outside the pipeline. A back plate is rotatably installed on the back of the sleeve ring, and a driving component is installed at the bottom of the back plate. The driving component is used to drive the sleeve ring to rotate;

[0013] A cross-oscillation component is installed on the sleeve ring. The cross-oscillation component includes two asymmetric percussion rods rotatably connected to the sleeve ring and a wave trough on the back plate. Sleeve rings are slidably arranged on the surfaces of the two percussion rods, and the sleeve rings are in contact with the wave trough. The wave peaks and wave valleys in the central symmetry direction of the wave trough correspond. During the movement of the rotation and displacement component, the percussion rods are driven by the wave trough to percussion the positions on both sides of the pipeline in non-vertical directions and non-same planes.

[0014] As a preferred embodiment of the present invention, a support frame is installed at the bottom of the hydraulic water pulse instrument. Reinforcing ribs are installed on the support frame, and support legs for height adjustment are screwed and arranged at the bottom of the support frame.

[0015] As a preferred embodiment of the present invention, a cabinet door is rotatably installed on the detection platform of the hydraulic water pulse instrument. The size of the cabinet door is adapted to the size of the detection port of the hydraulic water pulse instrument. An observation window for observing the test process is installed on the cabinet door. A handle is also installed on the cabinet door, and anti-slip grooves are provided on the surface of the handle.

[0016] As a preferred embodiment of the present invention, the clamping assembly includes a positioning block fixed on the hydraulic water pulse instrument and a push plate sliding on the surface of the hydraulic water pulse instrument. A locking bolt is rotatably arranged on the push plate, and the end of the locking bolt is screwed and connected to the surface of the positioning block. A synchronous plate is installed on the push plate, and a clamping plate is installed on the synchronous plate. The clamping plate clamps both sides of the pipeline.

[0017] As a preferred embodiment of the present invention, a guide rod is movably penetrated through the surface of the push plate. One end of the guide rod is installed on the side wall of the positioning block, and the other end of the guide rod is installed with a guide plate. The diameter of the guide plate is larger than that of the guide rod.

[0018] As a preferred embodiment of the present invention, a notch is opened at the bottom of the positioning sleeve, and a positioning frame is installed on the side wall of the positioning sleeve. The bottom of the positioning frame is installed on the hydraulic water pulse instrument.

[0019] As a preferred embodiment of the present invention, the driving assembly includes a driving motor. A driving gear is installed at the output end of the driving motor. A driven gear is meshed on the side wall of the driving gear. The driven gear is fixedly connected to the side wall of the collar. A connecting frame is installed on the outer shell of the driving motor. The connecting frame is connected to the back plate. Limiting rods are movably penetrated through both ends of the connecting frame. Limiting seats are installed at both ends of the limiting rods. The limiting seats are installed on the hydraulic water pulse instrument.

[0020] As a preferred embodiment of the present invention, an oscillating guide rail is installed on one end face of the back plate, and a wave groove is installed inside the oscillating guide rail. A slide rail is arranged on the other end face of the back plate. A chute is opened on the collar. The slide rail is slidably arranged in the chute.

[0021] As a preferred embodiment of the present invention, ejector rods are installed at both ends of the collar. A limiting sleeve is sleeved on the outer side wall of the ejector rod. The limiting sleeve is connected to the side wall of the collar. A baffle is slidably arranged inside the limiting sleeve. The baffle is connected to the ejector rod. The top of the ejector rod is slidably connected to the wave groove. A limiting spring is sleeved on the side wall of the ejector rod. One end of the limiting spring is clamped on the limiting sleeve, and the other end of the limiting spring is clamped on the baffle.

[0022] As a preferred embodiment of the present invention, two arch-shaped frames are installed on the side wall of the collar. Slide rods are installed inside both of the two arch-shaped frames. The slide rods are slidably connected to strip-shaped grooves opened on the corresponding knocking rods. Hammer heads are installed at both ends of the knocking rods. The rotation center of the knocking rod is rotatably connected to a mounting seat installed inside the collar. A torsion spring is clamped between the mounting seat and the knocking rod.

[0023] The present invention has the following beneficial effects compared with the prior art:

[0024] The present invention is provided with a cross-oscillation component, wherein the cross-oscillation component adopts a non-vertical and non-same-plane knocking method, combined with the rotational movement of the knocking rod around the pipeline, so that the knocking force can evenly and comprehensively cover the pipeline surface, avoid detection blind spots, and ensure detection integrity. The knocking forces in different directions produce various stress distributions and vibration modes in the pipeline, which can stimulate the vibration of the pipeline in multiple modes, help detect various defects in different directions, and improve defect detection capabilities. Since the knocking points are located on both sides of the pipeline and knock non-vertically up and down, the vibrations generated by the two knocking points are superimposed and interfered with each other, making the overall vibration of the pipeline more complex and uniform, reducing the interference of local factors on the detection results, avoiding defect misjudgment, and improving detection accuracy and reliability. When the knocking rod rotates around the pipeline, defects at different positions can be affected by the knocking force at different times, and the vibration response at the defect is repeatedly stimulated and enhanced. The knocking points on the left and right sides allow the defect to be subjected to force in different directions, further amplifying the vibration signal generated by the defect, making it easier for the detection equipment to capture defect information, thereby more accurately locating and judging the nature of the defect. In addition, the method of knocking up and down simultaneously and rotating the knocking rod around the pipe can complete the inspection of a larger area of the pipe in a shorter time. Compared with the traditional single-point vertical knocking method, there is no need to inspect point by point, which greatly reduces the inspection time and workload and significantly improves the inspection efficiency. Compared with the traditional single-direction vibration test, it greatly broadens the test dimension, comprehensively inspects the reliability of the pipeline under various stress conditions, and improves the comprehensiveness and effectiveness of the test.

[0025] The specific implementation modes of the present invention are further described in detail below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In the attached picture:

[0027] Figure 1 A three-dimensional diagram of the vibration hydraulic servo pulse test system for automobile pipelines in high and low temperature and hot and humid environments;

[0028] Figure 2 This is the internal structure diagram of the hydraulic water pulse instrument of the vibration hydraulic servo pulse test system for automobile pipelines in high and low temperature and humid heat environments;

[0029] Figure 3 Part of the vibration hydraulic servo pulse test system for automobile pipelines in high and low temperature and hot and humid environments Figure 1 ;

[0030] Figure 4 Part of the vibration hydraulic servo pulse test system for automobile pipelines in high and low temperature and hot and humid environments Figure 2 ;

[0031] Figure 5 For automotive pipeline resistance to high and low temperature and hot and humid environment vibration hydraulic servo pulse test systemFigure 4 Enlarged view of area A;

[0032] Figure 6 Cross-sectional view of the positioning sleeve of the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system;

[0033] Figure 7 Partial view of the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system Figure 2 ;

[0034] Figure 8 Installation drawing of the collar and back plate of the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system;

[0035] Figure 9 For the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system Figure 8 Enlarged view of area B;

[0036] Figure 10 Cross-sectional view of the limit sleeve of the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system;

[0037] Figure 11 Assembly of the collar and back plate of the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system Figure 1 ;

[0038] Figure 12 Assembly of the collar and back plate of the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system Figure 2 ;

[0039] Figure 13 Partial view of the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system Figure 3 ;

[0040] Figure 14 Partial view of the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system Figure 4 ;

[0041] Figure 15 Plan view of the knocking rod of the automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system.

[0042] In the figure:

[0043] 1. Hydraulic water pulse instrument; 11. Support frame; 111. Support leg; 12. Cabinet door; 121. Observation window; 122. Handle;

[0044] 2. Clamping plate; 21. Synchronous plate; 211. Pushing plate; 22. Positioning block; 221. Locking bolt; 222. Guide rod; 223. Guide plate;

[0045] 3. Positioning sleeve; 31. Positioning frame; 311. Internal thread; 32. Ferrule; 321. External thread; 33. Driving motor; 331. Driving gear; 332. Driven gear; 34. Notch

[0046] 4. Back plate; 41. Oscillation guide rail; 411. Wavy groove; 42. Slide rail; 421. Chute; 43. Connecting frame; 431. Limiting rod; 432. Limiting seat

[0047] 5. Ferrule; 51. Thrust rod; 511. Limiting sleeve; 512. Baffle; 513. Limiting spring; 52. Knocking rod; 521. Hammer head; 522. Mounting seat; 523. Torsion spring; 53. Arch frame; 531. Slide bar; 532. Strip groove Specific implementation mode

[0048] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention

[0049] Embodiment 1

[0050] As Figures 1 to 15 shown, a vibration hydraulic servo pulse test system for automobile pipelines in high and low temperature and humid environment includes a hydraulic water pulse instrument 1 and a clamping assembly for clamping pipelines

[0051] A rotation and displacement assembly is installed on the hydraulic water pulse instrument 1. The rotation and displacement assembly includes a positioning sleeve 3 with an internal thread 311 and a ferrule 32 with an external thread 321. The ferrule 32 is screwed inside the positioning sleeve 3, and the ferrule 32 is sleeved outside the pipeline. The back plate 4 is rotatably installed on the back of the ferrule 32, and a driving assembly is installed at the bottom of the back plate 4. The driving assembly is used to drive the ferrule 32 to rotate

[0052] A cross-oscillation assembly is installed on the ferrule 32. The cross-oscillation assembly includes two asymmetric knocking rods 52 rotatably connected to the ferrule 32 and a wavy groove 411 on the back plate 4. A ferrule 5 is slidably arranged on the surfaces of the two knocking rods 52, and the ferrule 5 is in contact with the wavy groove 411. The peaks and valleys of the wavy groove 411 correspond along the central symmetry direction. During the movement of the rotation and displacement assembly, the wavy groove can skillfully drive the knocking rod 52 to accurately knock the positions on both sides of the pipeline in non-vertical directions and non-same planes. This unique knocking method can simulate the multi-dimensional vibration impact suffered by automobile pipelines under actual complex working conditions, greatly improving the authenticity and effectiveness of the test, helping to more comprehensively and accurately detect the reliability of the pipeline, avoiding detection blind spots caused by traditional single-direction testing, and providing strong technical support for the quality control of automobile pipelines

[0053] As Figures 1 to 15 shown, in the specific implementation, a support frame 11 is installed at the bottom of the hydraulic water pulse instrument 1, and reinforcing ribs are installed on the support frame 11, greatly enhancing the stability and load-bearing capacity of the overall structure, ensuring that the equipment can still operate stably under complex test environments. At the bottom of the support frame 11, support legs 111 are screwed and installed. The support legs 111 can flexibly adjust the height, facilitating quick adjustment according to the flatness of different test sites, ensuring the equipment is placed horizontally, improving the accuracy of test data, and enhancing the versatility of the equipment to meet the test requirements of various different scenarios.

[0054] As Figures 1 to 15 shown, further, a cabinet door 12 is installed on the detection platform of the hydraulic water pulse instrument 1 through a flexible rotation structure. The size of the cabinet door 12 is precisely adapted to the size of the detection port of the hydraulic water pulse instrument 1, ensuring good sealing and protection. An observation window 121 for intuitively observing the test process is installed on the cabinet door 12, facilitating the operator to monitor the test status in real time, promptly discover problems and make adjustments. A handle 122 is also equipped on the cabinet door 12. Anti-slip grooves are carefully opened on the surface of the handle 122, which not only facilitates the operator to open and close the cabinet door, but also ensures the safety of the operation to a certain extent, avoiding accidents caused by hand slipping.

[0055] Example 2:

[0056] Based on Example 1, the difference in this example is that: As Figures 1 to 15 shown, the clamping assembly includes a positioning block 22 fixed on the hydraulic water pulse instrument 1 and a push plate 211 sliding on the surface of the hydraulic water pulse instrument. A locking bolt 221 is rotatably arranged on the push plate 211, and the end of the locking bolt 221 is screwed and connected to the surface of the positioning block 22. A synchronous plate 21 is installed on the push plate 211, and clamping plates 2 are installed on the synchronous plate 21. The clamping plates 2 clamp on both sides of the pipeline. A guide rod 222 is movably penetrated through the surface of the push plate 211. One end of the guide rod 222 is installed on the side wall of the positioning block 22, and the other end of the guide rod 222 is installed with a guide plate 223. The diameter of the guide plate 223 is larger than that of the guide rod 222. With this clamping assembly design, the operation is simple and efficient. The operator only needs to rotate the locking bolt 221, and by its rotation in the positioning block 22, the push plate 211 can be easily driven to move smoothly towards the positioning block 22. During the movement of the push plate 211, the synchronous plate 21 moves accordingly, so that the clamping plates 2 can quickly and accurately clamp pipelines with different diameters firmly. The setting of the guide rod 222 and the guide plate 223 not only ensures the stability and accuracy of the movement of the push plate 211, preventing the push plate 211 from deviating or shaking during the movement, but also effectively avoids the accidental detachment of the push plate 211 from the guide rod 222, greatly improving the reliability of pipeline clamping and providing a solid guarantee for subsequent high-precision tests.

[0057] As Figures 1 to 15 shown, in the specific implementation, a notch 34 is provided at the bottom of the positioning sleeve 3, and a positioning frame 31 is installed on the side wall of the positioning sleeve 3. The bottom of the positioning frame 31 is installed on the hydraulic water pulse instrument 1. The setting of this notch 34 helps to more conveniently operate and adjust the positioning sleeve 3 and related components during installation and debugging.

[0058] As Figures 1 to 15 shown, further, the driving assembly includes a driving motor 33. A driving gear 331 is installed at the output end of the driving motor 33. A driven gear 332 is meshed on the side wall of the driving gear 331. The driven gear 332 is fixedly connected to the side wall of the collar 32. A connecting frame 43 is installed on the outer shell of the driving motor 33. The connecting frame 43 is connected to the back plate 4. The two ends of the connecting frame 43 are movably penetrated by a limiting rod 431. Limiting seats 432 are installed at both ends of the limiting rod 431. The limiting seats 432 are installed on the hydraulic water pulse instrument 1. As a power source, when the driving motor 33 works, the driving gear 331 at its output end can efficiently drive the driven gear 332 to rotate, and then the collar 32 rotates accordingly. The setting of the limiting rod 431 and the limiting seats 432 effectively limits the movement range of the connecting frame 43 and the driving motor 33, ensuring the stability and reliability of the driving assembly during operation, avoiding component damage or abnormal operation caused by excessive displacement, greatly extending the service life of the equipment, and reducing the maintenance cost.

[0059] Example 3:

[0060] Based on Example 2, the difference from this example is that: As Figures 1 to 15 shown, an oscillating guide rail 41 is installed on one end face of the back plate 4, and a wave groove 411 is installed inside the oscillating guide rail 41. A slide rail 42 is provided on the other end face of the back plate 4. A chute 421 is opened on the collar 32. The slide rail 42 is slidably arranged in the chute 421. This matching design of the slide rail and the chute not only provides a smooth guide for the rotation and movement of the collar 32, but also further enhances the stability and accuracy of the operation of the cross-oscillation assembly, ensuring that the knocking rod 52 can accurately knock on the pipeline according to the preset trajectory, improving the repeatability and reliability of the test results.

[0061] As Figures 1 to 15As shown, in the specific implementation, ejector rods 51 are installed at both ends of the ferrule 5. A limit sleeve 511 is sleeved on the outer side wall of the ejector rod 51, and the limit sleeve 511 is connected to the side wall of the collar 32. A baffle 512 is slidably arranged inside the limit sleeve 511, and the baffle 512 is connected to the ejector rod 51. The top of the ejector rod 51 is slidably connected to the wave groove 411, and a limit spring 513 is sleeved on the side wall of the ejector rod 51. One end of the limit spring 513 is clamped on the limit sleeve 511, and the other end of the limit spring 513 is clamped on the baffle 512. When the collar 32 drives the ferrule 5 to rotate, the undulation of the wave groove 411 forces the ejector rod 51 to generate vertical displacement in the direction perpendicular to the rotation plane of the collar 32. During this process, the limit spring 513 can effectively ensure that the ejector rod 51 always fits tightly against the surface of the wave groove 411, and can quickly reset after the displacement of the ejector rod 51, ensuring the continuity and stability of the knocking action, and providing a reliable power transmission for simulating complex vibrations.

[0062] As Figures 1 to 15 shown, further, two arched frames 53 are installed on the side wall of the ferrule 5. Slide rods 531 are installed inside both of the two arched frames 53. The slide rods 531 are slidably connected to the strip-shaped grooves 532 opened on the corresponding knocking rods 52. Hammer heads 521 are installed at both ends of the knocking rod 52. The rotation center of the knocking rod 52 is rotatably connected to the mounting seat 522 installed inside the collar 32, and a torsion spring 523 is clamped between the mounting seat 522 and the knocking rod 52. When the ferrule 5 moves up and down, the slide rod 531 slides in the strip-shaped groove 532, accurately converting the vertical displacement of the ferrule 5 into the swing of the knocking rod 52 around its rotation center. The hammer head 521 knocks on the positions on both sides of the pipeline in non-vertical directions and non-same planes during the swinging process. The setting of the torsion spring 523 enables the knocking rod 52 to quickly reset after knocking, preparing for the next knocking, ensuring the efficiency and continuity of the knocking action, and at the same time, it can also adjust the knocking force and frequency according to the different material and structural characteristics of the pipeline, improving the applicability of the equipment.

[0063] The implementation principle of the automotive pipeline vibration hydraulic servo pulse test system for high and low temperature and humid environment of the present invention is as follows:

[0064] First, place the pipeline of the vehicle on the hydraulic water pulse instrument 1 and clamp it through the clamping assembly. During the clamping process, the operator rotates the locking bolt 221. Through its rotation in the positioning block 22, the push plate 211 is driven to move towards the positioning block 22. The movement of the push plate 211 will drive the synchronous plate 21 to move together, causing the clamping plates 2 installed on the synchronous plate 21 to gradually approach and finally firmly clamp the pipeline on both sides. During this process, the guide rod 222 that penetrates the surface of the push plate 211 ensures the stability and accuracy of the movement of the push plate 211, and the guide plate 223 prevents the push plate 211 from detaching from the guide rod 222. This clamping method has significant advantages. It is not only easy to operate, and can quickly clamp pipelines with different diameters only by rotating the locking bolt 221, but also can ensure that the pipeline remains stable during the test, avoiding test errors caused by loose clamping, and greatly improving the accuracy of the test results.

[0065] After completing the clamping of the pipeline, start the pipeline in the hydraulic water pulse instrument 1 to connect with the clamped vehicle pipeline, and then apply hydraulic water pulses simulating the actual working conditions to the pipeline to test the performance of the pipeline under pulsed pressure.

[0066] At the same time, start the drive motor 33 in the drive assembly. When the drive motor 33 works, the drive gear 331 at its output end will drive the driven gear 332 meshing with it to rotate. Since the driven gear 332 is fixedly connected to the side wall of the collar 32, the collar 32 will start to rotate accordingly. The collar 32 is inside the positioning sleeve 3 and rotates through the cooperation of the internal thread 311 and the external thread 321. At the same time, the collar 32 is sleeved on the outside of the pipeline, can perform circular motion around the pipeline, and the collar 32 can also move along the direction of the pipeline.

[0067] During the rotation of the collar 32, the cross-oscillation assembly starts to function.

[0068] Because the collar 5 fits with the wave groove 411 on the back plate 4, and the wave crests and wave troughs of the wave groove 411 correspond in the central symmetry direction, when the collar 32 drives the collar 5 to rotate together, the undulating shape of the wave groove 411 will force the ejector rod 51 on the collar 5 to generate vertical displacement in the direction perpendicular to the rotation plane of the collar 32. When the ejector rod 51 moves, the ejector rod 51 slides inside the limit sleeve 511 at this time, and the internal baffle 512 can compress the limit spring 513 at this time, which is convenient for later reset through the limit spring 513, and the limit spring 513 ensures that the ejector rod 51 always fits with the surface of the wave groove 411.

[0069] When the ferrule 5 reciprocates and slides, the slide bars 531 within the two arched frames 53 mounted on the side wall of the ferrule 5 are slidably connected to the strip-shaped grooves 532 formed in the corresponding knocking rods 52. When the ferrule 5 moves up and down, the slide bars 531 slide within the strip-shaped grooves 532, thereby converting the vertical displacement of the ferrule 5 into the swing of the knocking rods 52 around their rotation centers (i.e., the rotation connection points with the mounting bases 522). At this time, the two knocking rods 52 rotate in the same direction. Furthermore, during the swing of the knocking rods 52 driving the hammers 521 mounted at both ends, the positions on both sides of the pipeline that are not in the vertical direction and not in the same plane will be knocked, simulating the complex vibration impacts that the pipeline may receive during actual use.

[0070] Since the two knocking rods 52 rotate synchronously, (based on Figure 15 this), when the top knocking rod 52 rotates counterclockwise, at this time the bottom knocking rod 52 rotates synchronously. At this time, the top knocking rod 52 knocks on the left side of the pipeline, while the bottom knocking rod 52 can knock on the right side of the pipeline, and the knocking is not in the same plane and is not perpendicular to the pipeline.

[0071] Among them, the knocking rod 52 will rotate around the pipeline, and the knocking rod 52 can also move horizontally along the pipeline. This knocking method has many advantages.

[0072] The non-vertical knocking method can make the knocking force act on different positions on the surface of the pipeline. Combining the rotation of the knocking rod around the pipeline, each point on the surface of the pipeline has the opportunity to be knocked, avoiding the appearance of detection blind spots, and being able to comprehensively detect the conditions of each part of the pipeline, whether it is the top, bottom, or side, can be fully detected. Knocking forces in different directions will generate different stress distributions and vibration modes within the pipeline. The non-vertical knocking force can be decomposed into component forces in multiple directions, which can stimulate the pipeline to vibrate in multiple modes, helping to discover different types and directions of defects such as axial cracks, circumferential cracks, and oblique defects, and improving the detection ability for various defects.

[0073] Since the knocking points are located on both sides of the pipeline respectively, and are non-vertical knocking up and down, the vibrations generated by the two knocking points are superimposed and interfered with each other, making the overall vibration of the pipeline more complex and uniform, which can reduce the interference of local factors on the detection results, avoid misjudging as defects due to local abnormal vibrations, and improve the accuracy and reliability of the detection results. When the knocking rod rotates around the pipeline, defects at different positions will be affected by the knocking force at different times. The vibration response at the defect location will be excited and enhanced multiple times. At the same time, the setting of the knocking points on both the left and right sides allows the defect to be affected by forces in different directions, further amplifying the vibration signal generated by the defect, making it easier for the detection equipment to capture the defect information, and thus more accurately positioning and judging the nature of the defect.

[0074] In addition, by simultaneously tapping from above and below and rotating the tapping rod around the pipeline, the detection of a large area of the pipeline can be completed in a relatively short time. Compared with the traditional single-point vertical tapping method, there is no need to detect each point one by one, which greatly reduces the detection time and workload and improves the detection efficiency. This cross-oscillation component design can simulate extremely complex vibrations that are very close to the actual working conditions, comprehensively detecting the reliability of the pipeline under various stress conditions. Compared with the traditional single-direction vibration test, it greatly broadens the test dimension and improves the comprehensiveness and effectiveness of the test.

Claims

1. An automotive pipeline high and low temperature, humidity and vibration hydraulic servo pulse test system, including a hydraulic water pulse instrument (1) and a clamping assembly for clamping the pipeline, characterized in that: A rotation and displacement assembly is installed on the hydraulic water pulse instrument (1). The rotation and displacement assembly includes a positioning sleeve (3) with an internal thread (311) and a collar (32) with an external thread (321). The collar (32) is screwed inside the positioning sleeve (3), and the collar (32) is sleeved outside the pipeline. A back plate (4) is rotatably installed on the back of the collar (32), and a driving assembly is installed at the bottom of the back plate (4). The driving assembly is used to drive the collar (32) to rotate; A cross-oscillation assembly is installed on the collar (32). The cross-oscillation assembly includes two asymmetrically arranged knocking rods (52) rotatably connected to the collar (32) and a wave trough (411) on the back plate (4). A sleeve (5) is slidably arranged on the surfaces of the two knocking rods (52), and the sleeve (5) fits with the wave trough (411). The wave peaks and wave valleys of the wave trough (411) correspond in the central symmetry direction. During the movement of the rotation and displacement assembly, the knocking rods (52) are driven by the wave trough to knock on the non-vertical and non-coplanar positions on both sides of the pipeline.

2. The automotive pipeline high and low temperature, humidity and heat environment vibration hydraulic servo pulse test system according to claim 1, wherein A support frame (11) is installed at the bottom of the hydraulic water pulse instrument (1). Reinforcing ribs are installed on the support frame (11), and support legs (111) for adjusting the height are screwed and arranged at the bottom of the support frame (11).

3. The automotive pipeline high and low temperature, humid environment vibration hydraulic servo pulse test system according to claim 1, characterized in that, A cabinet door (12) is rotatably installed on the detection platform of the hydraulic water pulse instrument (1). The size of the cabinet door (12) is adapted to the size of the detection port of the hydraulic water pulse instrument (1). An observation window (121) for observing the test process is installed on the cabinet door (12). A handle (122) is also installed on the cabinet door (12), and anti-slip grooves are provided on the surface of the handle (122).

4. The automotive pipeline high and low temperature, humidity and heat environment vibration hydraulic servo pulse test system according to claim 1, characterized in that, The clamping assembly includes a positioning block (22) fixed on the hydraulic water pulse instrument (1) and a push plate (211) sliding on the surface of the hydraulic water pulse instrument. A locking bolt (221) is rotatably arranged on the push plate (211), and the end of the locking bolt (221) is screwed and connected to the surface of the positioning block (22). A synchronous plate (21) is installed on the push plate (211), and a clamping plate (2) is installed on the synchronous plate (21). The clamping plate (2) clamps both sides of the pipeline.

5. The automotive pipeline high and low temperature and humidity environment vibration hydraulic servo pulse test system according to claim 4, characterized in that A guide rod (222) is movably penetrated through the surface of the push plate (211). One end of the guide rod (222) is installed on the side wall of the positioning block (22), and a guide plate (223) is installed at the other end of the guide rod (222). The diameter of the guide plate (223) is larger than the diameter of the guide rod (222).

6. The vibration hydraulic servo pulse test system for automotive pipelines resistant to high and low temperature and humid environment according to claim 1, characterized in that, A notch (34) is provided at the bottom of the positioning sleeve (3). A positioning frame (31) is installed on the side wall of the positioning sleeve (3), and the bottom of the positioning frame (31) is installed on the hydraulic water pulse instrument (1).

7. The automotive pipeline high and low temperature, humidity and heat environment vibration hydraulic servo pulse test system according to claim 1, characterized in that, The driving assembly includes a driving motor (33). A driving gear (331) is installed at the output end of the driving motor (33). A driven gear (332) is meshed on the side wall of the driving gear (331). The driven gear (332) is fixedly connected to the side wall of the collar (32). A connecting frame (43) is installed on the outer shell of the driving motor (33). The connecting frame (43) is connected to the back plate (4). Two limiting rods (431) are movably penetrated through the two ends of the connecting frame (43). Limiting seats (432) are installed at the two ends of the limiting rods (431). The limiting seats (432) are installed on the hydraulic water pulse instrument (1).

8. The automotive pipeline high and low temperature and humidity environment vibration hydraulic servo pulse test system according to claim 1, characterized in that An oscillating guide rail (41) is installed on one end face of the back plate (4). A wave groove (411) is installed inside the oscillating guide rail (41). A slide rail (42) is arranged on the other end face of the back plate (4). A chute (421) is formed on the collar (32). The slide rail (42) is slidably arranged in the chute (421).

9. The automotive pipeline high and low temperature, humid environment vibration hydraulic servo pulse test system according to claim 1, characterized in that, Two ejector rods (51) are installed at the two ends of the ferrule (5). A limiting sleeve (511) is sleeved on the outer side wall of the ejector rod (51). The limiting sleeve (511) is connected to the side wall of the collar (32). A baffle (512) is slidably arranged inside the limiting sleeve (511). The baffle (512) is connected to the ejector rod (51). The top of the ejector rod (51) is slidably connected to the wave groove (411). A limiting spring (513) is sleeved on the side wall of the ejector rod (51). One end of the limiting spring (513) is clamped on the limiting sleeve (511). The other end of the limiting spring (513) is clamped on the baffle (512).

10. The automotive pipeline high and low temperature, humidity and heat environment vibration hydraulic servo pulse test system according to claim 1, characterized in that, Two arched frames (53) are installed on the side wall of the ferrule (5). Slide rods (531) are installed inside the two arched frames (53). The slide rods (531) are slidably connected to the strip-shaped grooves (532) formed on the corresponding knocking rods (52). Hammer heads (521) are installed at the two ends of the knocking rods (52). The rotation center of the knocking rod (52) is rotatably connected to a mounting seat (522) installed inside the collar (32). A torsion spring (523) is clamped between the mounting seat (522) and the knocking rod (52).

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