A pipeline detection device suitable for multifunctional test

Abstract

The application relates to the technical field of pipeline detection, and discloses a pipeline detection device suitable for multifunctional tests, which comprises a bottom plate, an inner supporting circular table I arranged above the bottom plate, an inner supporting circular table II arranged directly above the inner supporting circular table I, a solid interior of the inner supporting circular table I, a hollow interior of the inner supporting circular table II, an open cylinder slidingly connected to the outer wall of the inner supporting circular table I, a hydraulic rod fixedly installed on the inner wall of the open cylinder, a rotating connection between the output end of the hydraulic rod and the bottom of the inner supporting circular table I, a water injection assembly capable of injecting water into the pipeline interior arranged outside the inner supporting circular table II, water injection of the water injection assembly into the pipeline interior through the inner supporting circular table II, full water in the pipeline to simulate the conveying medium state, a pressure medium provided for leakage detection, and a pipeline wall leakage point capable of being detected, the pipeline being in a full water state after water injection, a small amount of water penetrating outward and flowing downward along the pipeline outer wall to provide a detection signal for a humidity detection head if there is a small leakage point on the pipeline wall.

Description

Technical Field

[0001] This invention belongs to the field of pipeline inspection technology, and specifically relates to a pipeline inspection device suitable for multi-functional testing. Background Technology

[0002] Pipelines are closed channels used to transport media such as liquids, gases, or slurries. They are widely used in fields such as oil and gas transportation, urban water and heating supply, chemical production, and municipal drainage. Pipeline inspection is a systematic evaluation of pipeline defects, internal damage, weld quality, and sealing performance through various sensing technologies and non-destructive testing methods. The core significance of pipeline inspection is to ensure the safety of the transported media, prevent leakage and explosion accidents, extend the service life of pipelines, and provide technical basis for pipeline design, manufacturing, installation, acceptance, and in-service safety assessment. Its main application areas cover long-distance oil and gas pipelines, urban underground pipe networks, industrial pressure pipelines, and heating pipe networks.

[0003] The basic inspection steps for pipelines in the existing technology are roughly as follows: First, the pipeline to be inspected is fixed on a workbench or support to ensure its stability. Then, the inspector uses an optical inspection device (such as a magnifying glass, industrial endoscope or camera) to scan the outer wall of the pipeline section by section, and observes the surface of the pipeline for visible defects such as cracks, pits, scratches or so through a screen.

[0004] Existing technologies often use testing instruments to inspect defects on the outer wall of pipelines, damage to the inner wall, weld quality, and sealing performance. However, during the pipeline manufacturing process, many tiny seepage points appear on the pipe wall. These seepage points are extremely small and not easily detected by testing instruments. The testing instruments have limited ability to identify surface micropores or penetrating seepage points, resulting in inadequate testing and an inability to accurately assess the overall sealing performance of the pipeline.

[0005] Therefore, the present invention provides a pipeline inspection device suitable for multifunctional testing. Summary of the Invention

[0006] To overcome the shortcomings of the prior art: to solve at least one technical problem raised in the background art.

[0007] The technical solution adopted by the present invention to solve its technical problem is as follows: The present invention provides a pipeline inspection device suitable for multifunctional testing, including a base plate, an inner supporting frustum I is arranged above the base plate, and an inner supporting frustum II is arranged directly above the inner supporting frustum I. The interior of the inner supporting frustum I is solid, and the interior of the inner supporting frustum II is hollow. An open cylinder is slidably connected to the outer wall of the inner supporting frustum I, and a hydraulic rod is fixedly installed on the inner wall of the open cylinder. The output end of the hydraulic rod is rotatably connected to the bottom of the inner supporting frustum I. An optical detection head and a humidity detection head are fixedly connected to the upper two sides of the base plate, respectively. A water injection component capable of injecting water into the pipeline is arranged outside the inner supporting frustum II. A drive component that drives the inner supporting frustum I to rotate is arranged outside the inner supporting frustum I. An external clamping component is arranged above the base plate. The external clamping component includes two sets of clamping plates that can rotate to clamp the outer wall of the pipeline. A ranging component that adjusts the position of the optical detection head and the humidity detection head according to the pipeline diameter is arranged outside the inner supporting frustum I.

[0008] Preferably, the water injection assembly includes a water tank, which is placed above the base plate. A water supply pipe is fixedly connected to the top of the water tank. The end of the water supply pipe away from the water tank is rotatably connected to the inner wall of the inner supporting truncated cone. A water pump is installed outside the water supply pipe. A water collection chamber is fixedly connected to one side of the base plate. A diversion truncated cone is fixedly installed at the center of the inner wall of the water collection chamber. An open cylinder is fixedly installed inside the diversion truncated cone. A return pipe is fixedly connected between the water collection chamber and the water tank.

[0009] Preferably, the drive assembly includes an outer ring gear, which is fixedly connected to the outer wall of the inner supporting truncated cone. The teeth of the outer ring gear mesh with a drive gear. A motor is fixedly installed inside the flow-guiding truncated cone. The output shaft of the motor is hollow, and a slide rod is slidably connected to the inner wall of the output shaft. The slide rod is engaged with the inner wall of the output shaft by a spline key, so that the slide rod can slide axially along the inner wall of the output shaft and rotate synchronously with the output shaft. The slide rod is fixedly connected to the bottom of the drive gear. A clamping ring is rotatably connected to the outer wall of the inner supporting truncated cone. The slide rod is rotatably connected to the inner wall of the clamping ring. Two sets of limiting blocks are fixedly connected to the outer wall of the slide rod. One side of each of the two sets of limiting blocks is respectively attached to the two sides of the clamping ring.

[0010] Preferably, the ranging component includes an L-shaped bracket, which is fixedly connected to the outer wall of the clamping ring. A wedge block is inserted into one side of the L-shaped bracket, and a push block is inserted into the other side of the L-shaped bracket. The wedge block and the push block are fixedly connected. A scale seat is fixedly connected to one side of the L-shaped bracket, and a moving block is fixedly connected to one side of the push block. The moving block is slidably connected to the inner wall of the moving block. A displacement sensor is provided on the inner side of the scale seat, and a spring is fixedly connected between the wedge block and the L-shaped bracket.

[0011] Preferably, a slide is symmetrically fixedly connected to the top of the base plate, and a slider is slidably connected to the inner wall of each slide. The two sliders are respectively fixedly connected to the bottom of the optical detection head and the humidity detection head. A telescopic rod is fixedly installed on one side of each slide. The output end of the telescopic rod passes through the inner wall of the slide and one end is fixedly connected to one side of the slider. The telescopic rod is electrically connected to the displacement sensor.

[0012] Preferably, the external clamping assembly also includes a connecting frame, which is fixedly connected to the top of the water collection tank. A rotating shaft is symmetrically rotatably connected to the top of the connecting frame. One end of each of the two sets of clamping plates is fixedly connected to the outer wall of the two rotating shafts. Several friction strips are fixedly connected to one side of each clamping plate.

[0013] Preferably, a guide rod is fixedly connected to the top of the connecting frame, a lifting block is slidably connected to the outer wall of the guide rod, an extrusion plate is provided on both sides of the lifting block, a rotating plate is fixedly connected to the outer wall of the rotating shaft, the outer sides of the two extrusion plates are in contact with the sides of the two rotating plates respectively, and a snap-fit ​​assembly is provided on one side of the lifting block to drive it to slide downward along the outer wall of the guide rod.

[0014] Preferably, the snap-fit ​​assembly includes an extension plate, which is fixedly connected to one side of the clamping ring. A fixing block is fixedly connected to the top of the extension plate. A plug rod is inserted into the inner wall of the fixing block. A wedge block is fixedly connected to one end of the plug rod. A spring is fixedly connected between the wedge block and the fixing block. A protrusion is fixedly connected to one side of the lifting block. A wedge groove is formed on the surface of the protrusion. The contour of the wedge groove is adapted to the wedge block.

[0015] Preferably, an iron block is fixedly connected to the end of the plug rod away from the wedge block, a magnet block is fixedly connected to the top of the water collection tank, the magnet block is located on one side of the iron block, a second spring is provided on the outside of the guide rod, the second spring is fixedly connected between the bottom of the lifting block and the top of the connecting frame, and a torsion spring is fixedly connected to the other side of the clamping plate, the first torsion spring is fixedly connected to the top of the connecting frame.

[0016] Preferably, hinge seats are fixedly connected to both sides of the lifting block, and the inner walls of the two hinge seats are respectively hinged to one end of the two extrusion plates. Two sets of torsion springs are fixedly connected between the inner side of the extrusion plate and the side of the lifting block. The elastic strength of the second torsion spring is much greater than that of the first torsion spring.

[0017] The beneficial effects of this invention are as follows: 1. The present invention provides a pipeline testing device suitable for multifunctional testing. The water injection component injects test water into the pipeline through the inner supporting truncated cone, filling the pipeline with water to simulate the state of transporting the medium. This provides a pressure medium for leakage detection, enabling the detection of leaks in the pipe wall. After water injection, the pipeline is in a full water state. If there are small leaks in the pipe wall, a small amount of water will seep outward and flow downward along the outer wall of the pipeline, providing a detection signal for the humidity detection head. The solid structure of the inner supporting truncated cone seals the bottom of the pipeline, preventing water from flowing out from the bottom after injection and ensuring that the pipeline remains full of water during the testing process.

[0018] 2. The pipeline inspection device applicable to multifunctional testing described in this invention achieves stable support and clamping of the inner wall of the pipeline through an inner support truncated cone, and seals the bottom of the pipeline to prevent test water from flowing out from the bottom during water injection and testing. When the drive component drives the inner support truncated cone and the pipeline to rotate, the outer wall of the pipeline will not be blocked, and the optical detection head and humidity detection head can scan without blind spots to avoid missed detections.

[0019] 3. The pipeline testing device applicable to multifunctional testing described in this invention, through the external clamping assembly, after the test is completed, two sets of clamping plates rotate relative to each other to approach and clamp the outer wall of the pipeline, replacing the supporting function of the inner support truncated cone, creating conditions for the separation of the inner support truncated cone from the pipeline. After the inner support truncated cone separates from the pipeline, the test water inside the pipeline can be discharged, which is convenient for subsequent recycling and reuse. In addition, the clamping plates also keep the pipeline stable during the drainage process, preventing it from tipping over or falling.

[0020] 4. The pipeline inspection device of the present invention, applicable to multifunctional testing, uses a ranging component. When the pipeline is inserted, the inclined block is squeezed and displaced. The displacement sensor collects the signal and controls the telescopic rod to push the optical detection head and the humidity detection head to the optimal detection distance. This ensures that the optical detection head is at the optimal focusing distance, enabling clear identification of minor defects such as cracks and pits on the outer wall of the pipeline. The humidity detection head is at the optimal sensing distance, enabling accurate capture of local humidity changes caused by leaks. This ensures clear images and accurate humidity data, improving detection accuracy and data reliability.

[0021] 5. The pipeline inspection device applicable to multifunctional testing described in this invention, when the two sets of clamping plates fully clamp the outer wall of the pipeline, the rotating plate can no longer rotate. At this time, if the lifting block continues to descend, the extrusion plate will overcome the elastic force of the torsion spring and deflect inward relative to the hinge seat to avoid excessive compression of the pipeline. This deflection stroke can be automatically adjusted according to the diameter of the pipeline—for larger diameter pipelines, the clamping plate will be in position earlier, and the extrusion plate will start to deflect earlier accordingly, and vice versa, the deflection will be later, thereby realizing adaptive external clamping for pipelines of different diameters, ensuring stable clamping and moderate force. Attached Figure Description

[0022] The invention will now be further described with reference to the accompanying drawings.

[0023] Figure 1 This is a perspective view of the entire invention; Figure 2 This is a schematic diagram of the structure of the detection head in this invention; Figure 3 This is a schematic diagram of one part of the internally supported frustum structure in this invention; Figure 4 This is a schematic diagram of the structure at the oblique block in this invention; Figure 5 This is a schematic diagram of the hydraulic rod structure in this invention; Figure 6 This is a schematic diagram of the structure at the drive gear in this invention; Figure 7 This is a schematic diagram of the two internally supporting frustum structures in this invention; Figure 8 This is a schematic diagram of the structure at the flow-guiding frustum in this invention; Figure 9 This is a schematic diagram of the structure of the lifting block in this invention; Figure 10 This is a schematic diagram of the structure of the transfer plate in this invention.

[0024] Figure 11 This is a schematic diagram of the structure at the extrusion plate in this invention; Figure 12 This is a schematic diagram of the structure at the protrusion in this invention.

[0025] In the diagram: 1. Base plate; 2. Internal support truncated cone I; 3. Opening cylinder; 4. Hydraulic rod; 5. Internal support truncated cone II; 6. Optical detection head; 7. Humidity detection head; 8. Water supply pipe; 9. Water tank; 10. Water pump; 11. Motor; 12. Slide rod; 13. Drive gear; 14. Outer ring gear; 15. Clamping ring; 16. Limiting block; 17. Connecting frame; 18. Rotating shaft; 19. Clamping plate; 20. Friction strip; 21. Drainage truncated cone; 22. Water collection tank; 23. Return pipe; 24. Guide rod; 25. Lifting mechanism. 26. Block; 27. Rotating plate; 28. Extension plate; 29. ​​Fixing block; 30. Connecting rod; 31. Wedge block; 32. Spring 1; 33. Protrusion; 34. Wedge groove; 35. Iron block; 36. Magnet block; 37. Spring 2; 38. Torsion spring 1; 39. Extrusion plate; 40. Hinge seat; 41. Torsion spring 2; 42. L-shaped bracket; 43. Inclined block; 44. Push block; 45. Spring 3; 46. Moving block; 47. Scale seat; 48. Displacement sensor; 49. Slider; 50. Slide table; 51. Telescopic rod. Detailed Implementation

[0026] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0027] like Figures 1 to 10 As shown, the present invention provides a technical solution: a pipeline testing device suitable for multifunctional testing, comprising a base plate 1, an inner supporting frustum 2 disposed above the base plate 1, and an inner supporting frustum 5 disposed directly above the inner supporting frustum 2 . The interior of the inner supporting frustum 2 1 is solid, while the interior of the inner supporting frustum 5 2 is hollow. An open cylinder 3 is slidably connected to the outer wall of the inner supporting frustum 2 1, and a hydraulic rod 4 is fixedly installed on the inner wall of the open cylinder 3. The output end of the hydraulic rod 4 is rotatably connected to the bottom of the inner supporting frustum 2 1. The upper sides of the base plate 1 are respectively An optical detection head 6 and a humidity detection head 7 are fixedly connected. A water injection component capable of injecting water into the pipe is provided on the outside of the inner supporting frustum 2. A drive component that drives the inner supporting frustum 2 to rotate is provided on the outside of the inner supporting frustum 2. An external clamping component is provided above the base plate 1. The external clamping component includes two sets of clamping plates 19. The two sets of clamping plates 19 can rotate to clamp the outer wall of the pipe. A ranging component that adjusts the position of the optical detection head 6 and the humidity detection head 7 according to the pipe diameter is provided on the outside of the inner supporting frustum 2.

[0028] During operation: Insert one end of the pipe to be inspected above the inner support frustum 2, so that the inner wall of the pipe is stably fitted against the arc-shaped outer wall of the inner support frustum 2, achieving internal support. At this time, the inner support frustum 2 5 is located directly above the other end of the pipe, but has not yet contacted the pipe. After the pipe is initially clamped by the inner support frustum 2, control the hydraulic rod 4 to output. Its output end extends and pushes the inner support frustum 2 and the pipe upward together until the inner wall of the top end of the pipe is inserted into the arc-shaped outer wall of the inner support frustum 2 5. At this point, the pipe is clamped between the inner supporting frustum 2 and the inner supporting frustum 5, achieving reliable internal clamping without obstructing the outer wall of the pipe. Subsequently, test water is injected into the hollow interior of the inner supporting frustum 2 5 through the water injection component. The water flows through the inner supporting frustum 2 5 into the inner wall of the pipe until it is full. Since the inner supporting frustum 2 2 is solid, it can seal the bottom of the pipe, preventing the injected water from flowing out. After water injection, if any small leaks are found at any point on the pipe wall... Leakage points will cause a small amount of water to seep outwards and flow downwards along the outer wall of the pipe. After water injection is completed, the drive assembly is activated to rotate the inner support truncated cone 2. Since the pipe is clamped above the inner support truncated cone 2, the rotation of the inner support truncated cone 2 causes the pipe to rotate synchronously, allowing the entire outer wall of the pipe to be scanned sequentially by the optical detection head 6 and the humidity detection head 7, ensuring no blind spots. The optical detection head 6 is used to detect whether there are defects such as cracks or pits on the outer wall of the pipe. The humidity detection head 7 is used to detect changes in humidity on the outer wall of the pipe. If the humidity is abnormal, it indicates that there is a leak at that location. Both detection results are displayed and analyzed in real time through the control panel above the base plate 1. In addition, when the pipe is placed above the inner support truncated cone 2, the position of the optical detection head 6 and the humidity detection head 7 can be adjusted according to the pipe diameter by the ranging component, so that the optical detection head 6 and the humidity detection head 7 maintain the optimal testing distance between the pipe and the pipe, ensuring that clear, stable, and comparable images and humidity data are obtained under different pipe diameters.

[0029] After the test is completed, the hydraulic rod 4 drives the inner support frustum 2 and the pipeline to descend and reset together. During the descent, the inner support frustum 2 will drive the outer clamping assembly to move, causing the two sets of clamping plates 19 to rotate relative to each other, gradually approaching the pipeline and gradually applying clamping force to the outer wall of the pipeline. As the clamping plates 19 gradually tighten, they begin to replace the inner support frustum 2 in clamping the bottom of the pipeline. When the two clamping plates 19 contact the outer wall of the pipeline and apply a certain clamping force, the inner support frustum 2 continues to descend. At this time, the inner support frustum 2 gradually separates from the bottom of the pipeline and no longer forms a seal on the bottom of the pipeline. Since the bottom of the pipeline is no longer sealed, the test water injected inside will flow out naturally from the opening at the bottom of the pipeline, realizing the automatic drainage function after the test. After the drainage is completed, the hydraulic rod 4 continues to drive the inner support frustum 2 to descend to the initial position. At this time, the inner support frustum 2 is completely separated from the bottom of the pipeline, the two sets of clamping plates 19 separate from each other, and the external clamping force applied to the pipeline is released. The operator can then remove the pipeline from the top of the device, completing a complete test cycle. In the above embodiments, the water injection assembly injects test water into the pipe through the inner supporting frustum 2 5, filling the pipe with water to simulate the state of the transported medium. This provides a pressure medium for leakage detection, allowing leaks in the pipe wall to be detected. After water injection, the pipe is in a full water state. If there are small leaks in the pipe wall, a small amount of water will seep outwards and flow downwards along the outer wall of the pipe, providing a detection signal for the humidity detection head 7. The solid structure of the inner supporting frustum 2 seals the bottom of the pipe, preventing water from flowing out from the bottom after injection. This ensures that the pipe remains full of water during the testing process. The inner supporting frustum 2 provides stable support and clamping to the inner wall of the pipe and provides protection to the bottom of the pipe. The system is sealed to prevent test water from flowing out from the bottom during water injection and testing. When the drive component rotates the inner support frustum 2 and the pipe, the outer wall of the pipe is not blocked, allowing the optical detection head 6 and humidity detection head 7 to scan without blind spots and avoid missed detections. After the test is completed, the two sets of clamping plates 19 rotate relative to each other and clamp the outer wall of the pipe, replacing the support function of the inner support frustum 2. This creates conditions for the inner support frustum 2 to separate from the pipe. After the inner support frustum 2 separates from the pipe, the test water inside the pipe can be discharged, facilitating subsequent recycling and reuse. The clamping plates 19 also keep the pipe stable during drainage, preventing it from tipping over or falling.

[0030] like Figure 2 , Figure 3 and Figure 8As shown, the water injection assembly includes a water tank 9, which is placed above the base plate 1. A water supply pipe 8 is fixedly connected to the top of the water tank 9. The end of the water supply pipe 8 away from the water tank 9 is rotatably connected to the inner wall of the inner support truncated cone 5. A water pump 10 is installed outside the water supply pipe 8. A water collection chamber 22 is fixedly connected to one side of the base plate 1. A flow-guiding truncated cone 21 is fixedly installed at the center of the inner wall of the water collection chamber 22. An open cylinder 3 is fixedly installed inside the flow-guiding cone 21. A return pipe 23 is fixedly connected between the water collection chamber 22 and the water tank 9.

[0031] During operation: After the pipe is clamped internally and the inner wall of the top of the pipe is inserted into the arc-shaped outer wall of the inner support frustum 2 5, the water pump 10 is started. The water pump 10 draws out the test water stored in the water tank 9 and delivers it to the inner wall of the inner support frustum 2 5 through the water pipe 8. Since the interior of the inner support frustum 2 5 is hollow, the water flows into the hollow interior of the inner support frustum 2 5 and continues to flow downward into the pipe. Water is continuously injected until the pipe is full, and then the water pump 10 is turned off. After the test is completed, the inner support frustum 2 2 descends and separates from the bottom of the pipe. The test water discharged from the pipe flows downward along the outer wall of the pipe and is drained. The truncated cone 21 can guide the water flow into the water collection tank 22, preventing water from splashing or accumulating inside the device, thus avoiding water accumulation affecting the accuracy of subsequent tests and the normal operation of the device. The flow-guiding truncated cone 21 can form an isolation protection for the drive components below the inner support truncated cone 2, preventing water from splashing or seeping into the drive components during the drainage process, preventing damage or failure of the components due to water ingress, and ensuring the stability and reliability of the device in multiple test cycles. After the test water enters the water collection tank 22, it can flow back to the water tank 9 through the return pipe 23, achieving the effect of resource reuse.

[0032] like Figures 5 to 6 As shown, the drive assembly includes an outer ring gear 14, which is fixedly connected to the outer wall of the inner supporting frustum 2. The teeth of the outer ring gear 14 mesh with the drive gear 13. A motor 11 is fixedly installed inside the flow-guiding frustum 21. The output shaft of the motor 11 is hollow, and a slide rod 12 is slidably connected to the inner wall of the output shaft. The slide rod 12 is engaged with the inner wall of the output shaft by a spline key, so that the slide rod 12 can slide axially along the inner wall of the output shaft and rotate synchronously with the output shaft. The slide rod 12 is fixedly connected to the bottom of the drive gear 13. A clamping ring 15 is rotatably connected to the outer wall of the inner supporting frustum 2. The slide rod 12 is rotatably connected to the inner wall of the clamping ring 15. Two sets of limiting blocks 16 are fixedly connected to the outer wall of the slide rod 12. One side of the two sets of limiting blocks 16 is respectively attached to the two sides of the clamping ring 15.

[0033] During operation: After the pipe rises, its top inner wall inserts into the arc-shaped outer wall of the inner support frustum 2 5 to achieve internal clamping. After the pipe is filled with water through the water injection component, the motor 11 is started. The output shaft of the motor 11 drives the drive gear 13 to rotate. The drive gear 13 drives the outer ring gear 14 to rotate through tooth meshing. When the outer ring gear 14 rotates, it drives the inner support frustum 2 to rotate together. Since the pipe is clamped above the inner support frustum 2, the rotation of the inner support frustum 2 drives the pipe to rotate synchronously, so that the entire outer wall of the pipe can be scanned by the optical detection head 6 and the humidity detection head 7 in sequence, ensuring no blind spots in detection. When the inner support frustum 2 moves up and down through the hydraulic rod 4, the inner support frustum 2 drives the clamping ring 15 to move up and down synchronously. The clamping ring 15 passes through... The limiting block 16 drives the slide rod 12 to slide axially along the inner wall of the hollow output shaft of the motor 11. Since the outer ring gear 14 is fixedly connected to the outer wall of the inner support truncated cone 2, the outer ring gear 14 moves synchronously with the inner support truncated cone 2 when it rises and falls. The slide rod 12 drives the drive gear 13 to rise and fall synchronously, so that the drive gear 13 can always maintain the same height position as the outer ring gear 14, and the teeth of the two are always in a meshing state. When the output shaft of the motor 11 rotates, since the slide rod 12 is connected to the inner wall of the output shaft by a spline key, the rotational torque of the output shaft can be transmitted to the slide rod 12, thereby driving the drive gear 13 to rotate. The drive gear 13 drives the outer ring gear 14 to rotate through tooth meshing, and then drives the inner support truncated cone 2 and the pipe to rotate together.

[0034] like Figures 3 to 4 As shown, the ranging component includes an L-shaped bracket 41, which is fixedly connected to the outer wall of the clamping ring 15. An inclined block 42 is inserted into one side of the L-shaped bracket 41, and a push block 43 is inserted into the other side of the L-shaped bracket 41. The inclined block 42 and the push block 43 are fixedly connected. A scale seat 46 is fixedly connected to one side of the L-shaped bracket 41, and a moving block 45 is fixedly connected to one side of the push block 43. The moving block 45 is slidably connected to the inner wall of the moving block 45. A displacement sensor 47 is provided on the inner side of the scale seat 46, and a spring 44 is fixedly connected between the inclined block 42 and the L-shaped bracket 41.

[0035] During operation: In the initial state, the inclined block 42 is located directly above the inner support truncated cone 2. When one end of the pipe is inserted downwards above the inner support truncated cone 2, the bottom wall of the pipe presses against the inclined surface of the inclined block 42, causing the inclined block 42 to overcome the elastic force of the spring 3 44 and move horizontally to the outside of the L-shaped bracket 41. The inclined block 42 drives the push block 43 to move synchronously, and the push block 43 then pushes the moving block 45 to slide on the inner wall of the scale seat 46. At this time, the displacement sensor 47, together with the surface scale of the scale seat 46, detects the displacement of the moving block 45. This displacement (i.e., the diameter of the pipe) provides a basis for subsequent adjustment of the position of the optical detection head 6 and the humidity detection head 7. When the pipe is removed upwards, the elastic force of the spring 3 44 drives the inclined block 42 and the push block 43 to reset and retract, so that the distance measurement can be repeated in the next detection.

[0036] like Figures 3 to 4 As shown, a slide table 49 is symmetrically fixedly connected above the base plate 1. A slider 48 is slidably connected to the inner wall of the slide table 49. The two sliders 48 are fixedly connected to the bottom of the optical detection head 6 and the humidity detection head 7, respectively. A telescopic rod 50 is fixedly installed on one side of the slide table 49. The output end of the telescopic rod 50 passes through the inner wall of the slide table 49 and one end is fixedly connected to one side of the slider 48. The telescopic rod 50 is electrically connected to the displacement sensor 47.

[0037] During operation: When the inclined block 42 is pressed down on the pipeline, the displacement sensor 47 detects the displacement of the moving block 45, i.e., the diameter of the pipeline. The displacement sensor 47 then transmits the displacement signal to the telescopic rod 50 in real time. The telescopic rod 50 automatically adjusts the extension length of its output end according to the received signal, pushing the slider 48 to slide horizontally on the inner wall of the slide table 49. This drives the optical detection head 6 and the humidity detection head 7 to move along the slide table 49 until they maintain the preset optimal detection distance from the outer wall of the pipeline, thus completing the automatic adjustment of the detection probe position.

[0038] like Figures 8 to 10 As shown, the external clamping assembly also includes a connecting frame 17, which is fixedly connected to the top of the water collection tank 22. A rotating shaft 18 is symmetrically rotatably connected to the top of the connecting frame 17. One end of each of the two sets of clamping plates 19 is fixedly connected to the outer wall of the two rotating shafts 18. Several friction strips 20 are fixedly connected to one side of each clamping plate 19.

[0039] During operation: After the test is completed, the hydraulic rod 4 drives the inner support frustum 2 and the pipeline to descend and reset together. During the descent, the inner support frustum 2 will drive the outer clamping assembly to move, causing the two rotating shafts 18 to rotate relative to each other. The rotating shafts 18 drive the two sets of clamping plates 19 to rotate synchronously relative to each other, gradually approaching the pipeline and gradually applying clamping force to the outer wall of the pipeline. The friction strip 20 is in close contact with the outer wall of the pipeline, increasing the clamping stability. As the clamping plates 19 gradually tighten, they begin to replace the inner support frustum 2 in clamping the bottom end of the pipeline. When the two clamping plates 19 contact the outer wall of the pipeline and apply a certain clamping force, the inner support frustum 2 continues to descend and separates from the bottom end of the pipeline. At this time, the pipeline remains stable under the clamping action of the clamping plates 19, and the internal test water is discharged from the bottom end of the pipeline. After the drainage is completed, the rotating shaft 18 rotates in the opposite direction, causing the two sets of clamping plates 19 to separate from each other, releasing the clamping force on the outer wall of the pipeline, making it easier for the operator to remove the pipeline.

[0040] like Figures 9 to 12 As shown, a guide rod 24 is fixedly connected to the top of the connecting frame 17. A lifting block 25 is slidably connected to the outer wall of the guide rod 24. Extrusion plates 38 are provided on both sides of the lifting block 25. Rotating plates 26 are fixedly connected to the outer wall of the rotating shaft 18. The outer sides of the two extrusion plates 38 are in contact with the sides of the two rotating plates 26 respectively. A snap-fit ​​assembly is provided on one side of the lifting block 25 to drive it to slide downward along the outer wall of the guide rod 24.

[0041] During operation: When the inner support truncated cone 2 and the pipe descend together, the inner support truncated cone 2 drives the lifting block 25 to slide down synchronously along the outer wall of the guide rod 24 through the snap-fit ​​assembly. When the lifting block 25 slides down, the outer side of the extrusion plate 38 applies a squeezing force to the side of the rotating plate 26, pushing the rotating plate 26 to rotate to both sides. The rotating shaft 18 then drives the two sets of clamping plates 19 to rotate relative to each other, gradually approaching the pipe and applying a clamping force to the outer wall of the pipe. When the inner support truncated cone 2 continues to descend and separates from the bottom of the pipe, the lifting block 25 slides to the lowest position. The two sets of clamping plates 19 maintain the clamping state on the outer wall of the pipe to ensure the stability of the pipe during drainage. After drainage is completed, the snap-fit ​​assembly releases the downward constraint on the lifting block 25, and the lifting block 25 slides upward along the guide rod 24 to reset. The extrusion plate 38 also moves upward to reset synchronously. After the rotating plate 26 loses the squeezing force, it rotates in the opposite direction to reset, thereby driving the two sets of clamping plates 19 to separate from each other and release the clamping force on the pipe.

[0042] like Figures 9 to 12As shown, the snap-fit ​​assembly includes an extension plate 27, which is fixedly connected to one side of the clamping ring 15. A fixing block 28 is fixedly connected to the top of the extension plate 27. A plug-in rod 29 is inserted into the inner wall of the fixing block 28. A wedge block 30 is fixedly connected to one end of the plug-in rod 29. A spring 31 is fixedly connected between the wedge block 30 and the fixing block 28. A protrusion 32 is fixedly connected to one side of the lifting block 25. A wedge groove 33 is formed on the surface of the protrusion 32. The contour of the wedge groove 33 is adapted to the wedge block 30.

[0043] During operation: When the inner support truncated cone 2 is pushed upward by the hydraulic rod 4, the clamping ring 15 drives the extension plate 27 and the fixed block 28 to rise together. The fixed block 28 drives the wedge block 30 to rise synchronously through the insertion rod 29. During the rise of the wedge block 30, when its inclined surface contacts the inclined surface of the wedge groove 33 on the protrusion 32, the wedge block 30 is squeezed, causing the insertion rod 29 to slide along the inner wall of the fixed block 28 and compress the spring 31. When the wedge block 30 continues to rise and slides to one side of the wedge groove 33, the spring 31 releases its elastic force, pushing the insertion rod 29 to drive the wedge block 30 to move in the opposite direction, so that the wedge block 30 is stuck in the inner wall of the wedge groove 33. At this time, the pipeline is just above the wall. The inner wall of the inner support truncated cone 2 5 is raised to the top and inserted into the arc-shaped outer wall of the inner support truncated cone 2 5 to achieve the inner clamping state. At the same time, the wedge block 30 and the wedge groove 33 are locked together. When the test is completed, the inner support truncated cone 2 2 is driven to descend by the hydraulic rod 4. The clamping ring 15 drives the extension plate 27, the fixing block 28 and the wedge block 30 to descend synchronously. Since the wedge block 30 and the wedge groove 33 are locked together, the wedge block 30 drives the lifting block 25 to descend together through the protrusion 32. The lifting block 25 slides down along the outer wall of the guide rod 24 and pushes the rotating plate 26 to rotate through the extrusion plate 38, thereby driving the two sets of clamping plates 19 to move closer to each other and apply clamping force to the outer wall of the pipe to achieve the outer clamping function.

[0044] like Figures 9 to 10 As shown, an iron block 34 is fixedly connected to the end of the plug rod 29 away from the wedge block 30. A magnet block 35 is fixedly connected above the water collection tank 22. The magnet block 35 is located on one side of the iron block 34. A second spring 36 is provided on the outside of the guide rod 24. The second spring 36 is fixedly connected between the bottom of the lifting block 25 and the top of the connecting frame 17. A first torsion spring 37 is fixedly connected to the other side of the clamping plate 19. The first torsion spring 37 is fixedly connected to the top of the connecting frame 17.

[0045] During operation: When the inner support frustum 2 rises, causing the wedge block 30 to rise synchronously, the iron block 34 moves upward along with the insertion rod 29, gradually moving away from the magnet block 35. When the inner support frustum 2 descends, the wedge block 30, through a snap-fit ​​connection, causes the protrusion 32 and the lifting block 25 to descend together. The lifting block 25 slides downward along the guide rod 24. At this time, the spring 36 is compressed and stores energy. Simultaneously, the extrusion plates 38 on both sides of the lifting block 25 move downward and apply a squeezing force to the side of the rotating plate 26. The rotating plate 26 drives the rotating shaft 18 to rotate, overcoming the elastic force of the torsion spring 37, causing the two sets of clamping plates 19 to rotate relative to each other and gradually approach the outer wall of the pipe, achieving reliable external clamping of the pipe. When the inner support frustum 2 descends to completely separate from the bottom end of the pipe, the wedge block 30 and the lifting block 25 stop moving downward. At this time, the lifting block 25 slides to At the lowest position, the two sets of clamping plates 19 externally clamp the pipe. In this stopped state, the test water inside the pipe is automatically drained. After the drainage is completed, the inner support truncated cone 2 continues to descend and drives the wedge block 30 to move further downward. When the wedge block 30 returns to the initial position, the iron block 34 re-enters the magnetic range of the magnet block 35. The magnet block 35 magnetically attracts the iron block 34, pulling the plug rod 29 to move the wedge block 30 to one side, causing the wedge block 30 to disengage from the wedge groove 33 and releasing the locking between the wedge block 30 and the protrusion 32. After the lifting block 25 loses its downward constraint, the spring 2 36 releases its elastic force to push the lifting block 25 to slide upward and reset. At the same time, the torsion spring 37 releases its elastic force to drive the rotating plate 26 to rotate in the opposite direction, causing the two sets of clamping plates 19 to separate from each other and release the clamping of the pipe.

[0046] like Figures 10 to 11 As shown, hinge seats 39 are fixedly connected to both sides of the lifting block 25. The inner walls of the two hinge seats 39 are respectively hinged to one end of the two extrusion plates 38. Two sets of torsion springs 40 are fixedly connected between the inner side of the extrusion plate 38 and the side of the lifting block 25. The elastic strength of the torsion springs 40 is much greater than that of the torsion springs 37.

[0047] During operation: When the extrusion plate 38 descends along with the lifting block 25 and presses against the rotating plate 26, because the elastic strength of the second torsion spring 40 is much greater than that of the first torsion spring 37, the extrusion plate 38 and the hinge seat 39 remain relatively fixed and will not rotate, thus pushing the rotating plate 26 downward in a rigid posture; under the push of the extrusion plate 38, the rotating plate 26 overcomes the elastic force of the first torsion spring 37 and drives the rotating shaft 18 to rotate, causing the two sets of clamping plates 19 to gradually move closer to the outer wall of the pipe and clamp it; when the two sets of clamping plates 19 completely clamp the pipe After the outer wall is closed, the rotating plate 26 can no longer rotate. If the lifting block 25 continues to descend, the extrusion plate 38 will overcome the elastic force of the torsion spring 40 and deflect inward relative to the hinge seat 39 to avoid excessive compression of the pipe. This deflection stroke can be automatically adjusted according to the pipe diameter. Pipes with larger diameters will cause the clamping plate 19 to be in place earlier, and the extrusion plate 38 will start to deflect earlier accordingly. Conversely, pipes with smaller diameters will deflect later, thereby achieving adaptive external clamping for pipes of different diameters, ensuring stable clamping and moderate force.

[0048] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pipeline testing device suitable for multi-functional testing, comprising a base plate, characterized in that: An inner supporting frustum I is positioned above the base plate, and an inner supporting frustum II is positioned directly above the inner supporting frustum I. The interior of the inner supporting frustum I is solid, while the interior of the inner supporting frustum II is hollow. An open cylinder is slidably connected to the outer wall of the inner supporting frustum I, and a hydraulic rod is fixedly installed on the inner wall of the open cylinder. The output end of the hydraulic rod is rotatably connected to the bottom of the inner supporting frustum I. An optical detection head and a humidity detection head are fixedly connected to the upper two sides of the base plate, respectively. A water injection component capable of injecting water into the pipe is positioned outside the inner supporting frustum II. A drive component that drives the inner supporting frustum I to rotate is positioned outside the inner supporting frustum I. An external clamping component is positioned above the base plate, and the external clamping component includes two sets of clamping plates that can rotate to clamp the outer wall of the pipe. A ranging component that adjusts the position of the optical detection head and the humidity detection head according to the pipe diameter is positioned outside the inner supporting frustum I.

2. The pipeline testing device suitable for multi-functional testing according to claim 1, characterized in that: The water injection assembly includes a water tank, which is placed above the base plate. A water supply pipe is fixedly connected to the top of the water tank. The end of the water supply pipe away from the water tank is rotatably connected to the inner wall of the inner supporting truncated cone. A water pump is installed outside the water supply pipe. A water collection chamber is fixedly connected to one side of the base plate. A diversion truncated cone is fixedly installed at the center of the inner wall of the water collection chamber. An open cylinder is fixedly installed inside the diversion truncated cone. A return pipe is fixedly connected between the water collection chamber and the water tank.

3. A pipeline testing device suitable for multi-functional testing according to claim 2, characterized in that: The drive assembly includes an outer ring gear, which is fixedly connected to the outer wall of the inner supporting truncated cone. The teeth of the outer ring gear mesh with a drive gear. A motor is fixedly installed inside the flow-guiding truncated cone. The output shaft of the motor is hollow, and a slide rod is slidably connected to the inner wall of the output shaft. The slide rod is engaged with the inner wall of the output shaft by a spline key, so that the slide rod can slide axially along the inner wall of the output shaft and rotate synchronously with the output shaft. The slide rod is fixedly connected to the bottom of the drive gear. A clamping ring is rotatably connected to the outer wall of the inner supporting truncated cone. The slide rod is rotatably connected to the inner wall of the clamping ring. Two sets of limiting blocks are fixedly connected to the outer wall of the slide rod. One side of each of the two sets of limiting blocks is respectively attached to the two sides of the clamping ring.

4. A pipeline testing device suitable for multifunctional testing according to claim 3, characterized in that: The ranging component includes an L-shaped bracket, which is fixedly connected to the outer wall of the clamping ring. A wedge block is inserted into one side of the L-shaped bracket, and a push block is inserted into the other side of the L-shaped bracket. The wedge block and the push block are fixedly connected. A scale seat is fixedly connected to one side of the L-shaped bracket, and a moving block is fixedly connected to one side of the push block. The moving block is slidably connected to the inner wall of the moving block. A displacement sensor is provided on the inner side of the scale seat, and a spring is fixedly connected between the wedge block and the L-shaped bracket.

5. A pipeline testing device suitable for multifunctional testing according to claim 4, characterized in that: A slide table is symmetrically fixedly connected to the top of the base plate. A slider is slidably connected to the inner wall of the slide table. Two sliders are fixedly connected to the bottom of the optical detection head and the humidity detection head, respectively. A telescopic rod is fixedly installed on one side of the slide table. The output end of the telescopic rod passes through the inner wall of the slide table and one end is fixedly connected to one side of the slider. The telescopic rod is electrically connected to the displacement sensor.

6. A pipeline testing device suitable for multifunctional testing according to claim 5, characterized in that: The external clamping assembly also includes a connecting frame, which is fixedly connected to the top of the water collection tank. A rotating shaft is symmetrically rotatably connected to the top of the connecting frame. One end of each of the two clamping plates is fixedly connected to the outer wall of the two rotating shafts. Several friction strips are fixedly connected to one side of each clamping plate.

7. A pipeline testing device suitable for multifunctional testing according to claim 6, characterized in that: A guide rod is fixedly connected to the top of the connecting frame. A lifting block is slidably connected to the outer wall of the guide rod. Extrusion plates are provided on both sides of the lifting block. Rotating plates are fixedly connected to the outer wall of the rotating shaft. The outer sides of the two extrusion plates are in contact with the sides of the two rotating plates respectively. A snap-fit ​​assembly is provided on one side of the lifting block to drive it to slide downward along the outer wall of the guide rod.

8. A pipeline testing device suitable for multifunctional testing according to claim 7, characterized in that: The snap-fit ​​assembly includes an extension plate, which is fixedly connected to one side of the clamping ring. A fixing block is fixedly connected to the top of the extension plate. A plug rod is inserted into the inner wall of the fixing block. A wedge block is fixedly connected to one end of the plug rod. A spring is fixedly connected between the wedge block and the fixing block. A protrusion is fixedly connected to one side of the lifting block. A wedge groove is formed on the surface of the protrusion. The contour of the wedge groove is adapted to the wedge block.

9. A pipeline testing device suitable for multifunctional testing according to claim 8, characterized in that: An iron block is fixedly connected to the end of the plug rod away from the wedge block. A magnet is fixedly connected to the top of the water collection tank. The magnet is located on one side of the iron block. A second spring is provided on the outside of the guide rod. The second spring is fixedly connected between the bottom of the lifting block and the top of the connecting frame. A torsion spring is fixedly connected to the other side of the clamping plate. The first torsion spring is fixedly connected to the top of the connecting frame.

10. A pipeline testing device suitable for multifunctional testing according to claim 9, characterized in that: Both sides of the lifting block are fixedly connected with hinge seats. The inner walls of the two hinge seats are respectively hinged to one end of the two extrusion plates. Two sets of torsion springs are fixedly connected between the inner side of the extrusion plate and the side of the lifting block. The elastic strength of torsion springs is much greater than that of torsion springs.

Images