Ultrasonic flaw detection equipment for internal defects of pipeline and operation method of ultrasonic flaw detection equipment

Abstract

The invention belongs to the field of pipeline detection, and particularly relates to ultrasonic flaw detection equipment for internal defects of a pipeline and an operation method thereof.The ultrasonic flaw detection equipment comprises a base, the top of the base is fixedly connected with a supporting frame, one side of the supporting frame is fixedly connected with a fixing frame, and the outer wall of the fixing frame is fixedly connected with a motor; according to the ultrasonic flaw detection equipment for the internal defects of the pipeline and the operation method of the ultrasonic flaw detection equipment, a certain amount of coupling agent is stored in the discharging cavity, the coupling agent in the discharging cavity is put onto the pipeline in cooperation with the linkage unit when the probe is controlled to move downwards to perform flaw detection on the pipeline, and the coupling agent is put into the pipeline when the probe is controlled to move transversely to perform flaw detection on different positions of the pipeline. The coupling agent can be uniformly smeared on the top of the pipeline through the transversely-moving flow guide block, the linkage assembly is matched when the probe is taken back, paper on roller paper is laid on the supporting plate, in the process that the probe moves back, the coupling agent on the probe can be wiped through the paper, and it is prevented that the coupling agent is dried and condensed on the probe to affect the accuracy of the probe.

Description

Technical Field

[0001] The present invention belongs to the field of pipeline detection, in particular to an ultrasonic flaw detection device for detecting internal defects of a pipeline and an operating method thereof. Background Art

[0002] Pipeline inspection is to prevent pipeline leakage due to corrosion or loose welding, or pipeline damage that leads to gas supply interruption. Non-destructive testing is generally used for pipeline inspection. Non-destructive testing refers to the use of sound, light, magnetism and electricity to detect whether there are defects or unevenness in the inspected object without damaging or affecting the performance of the inspected object, and provide information such as the size, location, nature and number of defects. In the existing technology, an acoustic wave generator is usually used to emit ultrasonic waves into the pipeline for flaw detection.

[0003] In existing technologies, when using ultrasonic flaw detection on pipelines, it is necessary to manually apply coupling agent to the pipeline to enable ultrasonic waves to be better transmitted between the probe and the object being detected, thereby improving the accuracy and sensitivity of the detection. However, the manual application of coupling agent is inefficient, not suitable for automated operation of the detection equipment, and not convenient for flaw detection of large batches of pipelines. In addition, when using the sound wave generator, its probe will come into contact with the coupling agent. Existing technology makes it difficult to wipe the coupling agent on the probe after use. If it is allowed to dry and condense on the probe, it will affect the accuracy of ultrasonic detection.

[0004] To this end, the present invention provides an ultrasonic flaw detection device for detecting internal defects of a pipeline and an operating method thereof. Summary of the Invention

[0005] To overcome the shortcomings of the existing technology and address the problems of low efficiency of manual application of coupling agent, unsuitability for automated operation of detection equipment, inconvenience in flaw detection of large batches of pipelines, and inconvenience in wiping the coupling agent from the probe after use when the acoustic wave generator is used, and allowing the coupling agent to dry and solidify on the probe will affect the accuracy of ultrasonic detection, the present invention proposes an ultrasonic flaw detection device for internal defects in pipelines and an operating method thereof.

[0006] The technical solution adopted by the present invention to solve its technical problem is: an ultrasonic flaw detection device for internal defects of a pipeline described in the present invention comprises a base, the top of the base is fixedly connected to a support frame, one side of the support frame is fixedly connected to a fixing frame, the outer wall of the fixing frame is fixedly connected to a motor, the output end of the motor extends to the inside of the fixing frame and is fixedly connected to a screw rod, the outer wall of the screw rod is connected to a slider through a screw nut pair, the slider is slidably connected to the fixing frame, the bottom of the slider is fixedly connected to a slide plate, the bottom of the slide plate is fixedly connected to an electric telescopic rod, the output end of the electric telescopic rod is fixedly connected to a first mounting plate, the inner wall of the first mounting plate is slidably connected to a first sliding shaft, the bottom of the first sliding shaft is fixedly connected to a guide plate, the top of the first sliding shaft is fixedly connected to a limiting block, the outer wall of the first sliding shaft is sleeved with a first spring, the inner wall of the guide plate is fixedly connected to a guide block, the bottom of the guide block is equipped with a probe, and the top of the base is equipped with a clamping member.

[0007] Preferably, the outer wall of the electric telescopic rod is fixedly connected to a fixed plate, and the bottom of the fixed plate is symmetrically fixedly connected to two liquid storage boxes, the inner wall of the liquid storage box is provided with a liquid storage cavity, the bottom of the inner wall of the liquid storage cavity is set as an inclined surface, the top of the inner wall of the liquid storage cavity is fixedly connected to a second sliding shaft, the outer wall of the second sliding shaft is slidably connected to a lower pressure plate, the lower pressure plate is slidably connected to the liquid storage cavity, the outer wall of the second sliding shaft is sleeved with a second spring located above the lower pressure plate, the interior of the liquid storage box and at the bottom of the liquid storage cavity is provided with a first discharge port, and the interior of the liquid storage box is provided with a discharge assembly.

[0008] Preferably, the discharge assembly includes a baffle, which is installed inside the liquid storage box and is slidably connected to the liquid storage box. The baffle is located below the liquid storage cavity. A discharge cavity is provided inside the baffle. The bottom of the inner wall of the discharge cavity is set as an inclined surface. A second discharge port is provided at the top and bottom of the discharge cavity. The second discharge port located above is inside the first discharge port. The second discharge port located below is staggered with the first discharge port. The outer wall of the guide plate is provided with a linkage unit used in conjunction with the baffle.

[0009] Preferably, the linkage unit includes two first brackets, the two first brackets are symmetrically fixedly installed on the outer wall of the guide plate, the tops of the two first brackets are fixedly connected to the second bracket, one side of the two second brackets is fixedly connected to the third bracket, the bottoms of the two third brackets are fixedly connected to a push rod, the two push rods extend to the interior of the two liquid storage boxes respectively, the push rods are slidably connected to the liquid storage boxes, one end of the baffle is fixedly connected to the third spring, one end of the third spring is fixedly connected to the liquid storage box, the top of the baffle is provided with an inclined groove for cooperating with the push rod, the baffle and the interior of the liquid storage box are provided with a through groove, and the push rod slides through the two through grooves.

[0010] Preferably, two material discharge troughs are symmetrically opened inside the guide plate, and the two material discharge troughs are respectively located directly below the two first material discharge ports. Two guide plates are symmetrically fixedly connected inside the guide plate, and the two guide plates are respectively located below the two material discharge troughs, and both guide plates are installed with a downward tilt.

[0011] Preferably, the inner walls of the two discharge troughs are both configured to be arc-shaped, both sides of the guide block are configured to be arc-shaped surfaces, and the top opening of the discharge trough is larger than the bottom opening of the first discharge port.

[0012] Preferably, the outer wall of the support frame is fixedly connected to a second mounting plate, a cavity is provided inside the support frame and above the second mounting plate, the inner wall of the second mounting plate is rotatably connected to a rotating shaft, a roll paper is installed on the outer wall of the rotating shaft, and a linkage assembly is provided between the rotating shaft and the fixed plate.

[0013] The two gears are connected with each other through the gear shifting mechanism, and the two gears are connected with each other through the gear shifting mechanism, and the two gears are connected with each other through the gear shifting mechanism.

[0014] Preferably, the inner wall of the second mounting plate is slidably connected to a third sliding shaft, the top of the third sliding shaft is fixedly connected to a support plate, the outer wall of the third sliding shaft is sleeved with a fourth spring, and both sides of the support plate are set as arc surfaces.

[0015] An operating method for an ultrasonic flaw detection device for internal defects in pipelines is provided. The operating method is applicable to the aforementioned ultrasonic flaw detection device for internal defects in pipelines. The steps of the method are as follows: S1: The pipe to be inspected is clamped and fixed by a clamping member, and coupling agent is pre-deposited in the liquid storage chamber; S2: The probe is controlled to move downward by the electric telescopic rod, so that the probe is close to the outer shell of the pipe. The probe emits ultrasonic waves to detect flaws inside the pipe. While controlling the probe to move downward, the coupling agent in the feeding chamber is applied to the pipe. S3: The motor controls the transverse movement of the probe to detect flaws at different positions of the pipeline. When the probe is moved to the far left, the linkage assembly releases the roller paper to wipe the coupling agent on the probe that has completed the flaw detection.

[0016] The beneficial effects of the present invention are as follows: 1. The ultrasonic flaw detection equipment for internal pipeline defects and its operating method described in the present invention utilizes a feed chamber to store a certain amount of coupling agent. When the probe is controlled to move downward to detect pipeline flaws, the coupling agent in the feed chamber can be released onto the pipeline in conjunction with a linkage unit, thereby improving the transmission of ultrasonic waves between the probe and the pipeline.

[0017] 2. The ultrasonic flaw detection equipment for internal defects in pipelines and its operating method described in the present invention control the lateral movement of the probe to detect flaws at different locations on the pipeline. The lateral movement of the guide block can evenly spread the coupling agent on the top of the pipeline, facilitating the probe to perform lateral flaw detection on the pipeline.

[0018] 3. The ultrasonic flaw detection equipment for internal pipeline defects and its operating method described in the present invention cooperate with the linkage assembly when retracting the probe, so that the paper on the paper roll is laid on the support plate. During the probe's retraction process, the paper can wipe the coupling agent on the probe, preventing the coupling agent from drying and condensing on the probe, affecting the probe's accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings.

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a three-dimensional diagram of the support plate and guide plate of the present invention in cooperation with each other; Figure 3 This is a three-dimensional diagram of the use of the ejector rod and the fixing plate of the present invention; Figure 4 It is a front cross-sectional view of the liquid storage box of the present invention; Figure 5 is a side sectional view of a deflector of the present invention; Figure 6 This invention Figure 2 Enlarged view of point A in the middle; Figure 7 This invention Figure 3 Enlarged view of point B in the middle; In the figure: 1. base; 2. support frame; 3. fixing frame; 4. motor; 5. screw; 6. slider; 7. cavity; 8. slide plate; 9. electric telescopic rod; 10. fixing plate; 11. liquid storage box; 12. first mounting plate; 13. first slide shaft; 14. first spring; 15. limit block; 16. guide plate; 17. guide block; 18. probe; 19. liquid storage chamber; 20. lower pressure plate; 21. second slide shaft; 22. second spring; 23. first discharge port; 24. baffle; 25. third spring; 26. discharge Cavity; 27, second discharge port; 28, inclined slot; 29, push rod; 30, first bracket; 31, second bracket; 32, third bracket; 33, discharge chute; 34, guide plate; 35, second mounting plate; 36, rotating shaft; 37, roller paper; 38, third slide shaft; 39, fourth spring; 40, support plate; 41, connecting rod; 42, mounting bracket; 43, rack; 44, fifth spring; 45, gear; 46, positioning plate; 47, fourth slide shaft; 48, sixth spring; 49, check block; 50, clamping member. DETAILED DESCRIPTION

[0021] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0022] like Figures 1 to 7 As shown, the present invention provides a technical solution, an ultrasonic flaw detection equipment for internal defects of a pipeline, comprising a base 1, the top of the base 1 is fixedly connected to a support frame 2, one side of the support frame 2 is fixedly connected to a fixing frame 3, the outer wall of the fixing frame 3 is fixedly connected to a motor 4, the output end of the motor 4 extends to the inside of the fixing frame 3 and is fixedly connected to a screw rod 5, the outer wall of the screw rod 5 is connected to a slider 6 through a screw nut pair, the slider 6 is slidably connected to the fixing frame 3, the bottom of the slider 6 is fixedly connected to a slide plate 8, the bottom of the slide plate 8 is fixedly connected to an electric telescopic rod 9, the output end of the electric telescopic rod 9 is fixedly connected to a first mounting plate 12, the inner wall of the first mounting plate 12 is slidably connected to a first sliding shaft 13, the bottom of the first sliding shaft 13 is fixedly connected to a guide plate 16, the top of the first sliding shaft 13 is fixedly connected to a limiting block 15, the outer wall of the first sliding shaft 13 is sleeved with a first spring 14, the inner wall of the guide plate 16 is fixedly connected to a guide block 17, the bottom of the guide block 17 is installed with a probe 18, and the top of the base 1 is installed with a clamping member 50.

[0023] By means of the above technical solution, the pipe to be inspected is clamped and fixed by the clamping member 50, and the electric telescopic rod 9 is started to move the first mounting plate 12 downward, thereby driving the guide plate 16 downward, the guide block 17 downward, and the probe 18 downward, so that the probe 18 is close to the outer shell of the pipe. The probe 18 emits ultrasonic waves to detect flaws inside the pipe. After the probe 18 is close to the pipe, the first sliding shaft 13 slides in the first mounting plate 12, compressing the first spring 14. The provision of the first spring 14 not only prevents the probe 18 from being damaged by a rigid collision with the pipe, but also facilitates the probe 18 to always fit the pipe. The motor 4 is started to drive the screw rod 5 to rotate, so that the slider 6 moves, and the slide plate 8 moves, so as to facilitate the adjustment of the lateral position of the probe 18, and to detect flaws at different positions of the pipe.

[0024] Specifically, the outer wall of the electric telescopic rod 9 is fixedly connected to a fixed plate 10, and two liquid storage boxes 11 are symmetrically fixedly connected to the bottom of the fixed plate 10. A liquid storage cavity 19 is provided on the inner wall of the liquid storage box 11, and the bottom of the inner wall of the liquid storage cavity 19 is set as an inclined surface. The top of the inner wall of the liquid storage cavity 19 is fixedly connected to a second sliding shaft 21, and the outer wall of the second sliding shaft 21 is slidably connected to a lower pressure plate 20. The lower pressure plate 20 is slidably connected to the liquid storage cavity 19, and a second spring 22 is sleeved on the outer wall of the second sliding shaft 21 and located above the lower pressure plate 20. A first discharge port 23 is provided inside the liquid storage box 11 and at the bottom of the liquid storage cavity 19, and a discharge assembly is provided inside the liquid storage box 11.

[0025] Through the above technical solution, the coupling agent is loaded into the liquid storage chamber 19 and below the lower pressure plate 20. Under the action of the second spring 22, the lower pressure plate 20 is continuously moved downward to facilitate the discharge of the coupling agent along the first discharge port 23. By setting the discharge assembly, the first discharge port 23 is blocked when the pipeline is not being inspected to prevent the coupling agent from leaking. When the pipeline is being inspected, a certain amount of coupling agent can be discharged, so that the ultrasonic wave can be better transmitted between the probe 18 and the pipeline.

[0026] Specifically, the unloading assembly includes a baffle 24, which is installed inside the liquid storage box 11 and is slidably connected to the liquid storage box 11. The baffle 24 is located below the liquid storage chamber 19. A unloading chamber 26 is provided inside the baffle 24. The bottom of the inner wall of the unloading chamber 26 is set as an inclined surface. A second unloading port 27 is provided at the top and bottom of the unloading chamber 26. The second unloading port 27 located above is inside the first unloading port 23. The second unloading port 27 located below is staggered with the first unloading port 23. The outer wall of the guide plate 16 is provided with a linkage unit used in conjunction with the baffle 24.

[0027] Through the above technical solution, the coupling agent flows into the first discharge port 23 along the inclined surface at the bottom of the liquid storage chamber 19, and enters the discharge chamber 26 along the second discharge port 27 located above. At this time, the second discharge port 27 located below is blocked, so that the coupling agent is stored in the discharge chamber 26. When the electric telescopic rod 9 controls the guide plate 16 to move downward, the baffle 24 is driven to move by the linkage unit, so that the second discharge port 27 located below is moved to the inside of the first discharge port 23. The second discharge port 27 located above is misaligned with the first discharge port 23. At this time, the coupling agent in the discharge chamber 26 can flow downward along the inclined surface of the bottom of the discharge chamber 26 to the second discharge port 27 below, and flow out from the second discharge port 27 below.

[0028] Specifically, the linkage unit includes two first brackets 30, and the two first brackets 30 are symmetrically fixedly installed on the outer wall of the guide plate 16. The tops of the two first brackets 30 are fixedly connected to the second bracket 31, and one side of the two second brackets 31 is fixedly connected to the third bracket 32. The bottoms of the two third brackets 32 are fixedly connected to the top rod 29, and the two top rods 29 extend to the interior of the two liquid storage boxes 11 respectively. The top rod 29 is slidably connected to the liquid storage boxes 11, and one end of the baffle 24 is fixedly connected to the third spring 25, and one end of the third spring 25 is fixedly connected to the liquid storage box 11. The top of the baffle 24 is provided with an inclined groove 28 for cooperating with the top rod 29, and the baffle 24 and the interior of the liquid storage box 11 are provided with a through groove, and the top rod 29 slides through the two through grooves.

[0029] Through the above technical solution, when the electric telescopic rod 9 controls the guide plate 16 to move downward, it drives the first bracket 30 to move downward, causes the second bracket 31 to move downward, drives the third bracket 32 to move downward, and causes the push rod 29 to move downward. At this time, the push rod 29 slides in the liquid storage box 11 and presses against the inclined groove 28 at the top of the baffle 24. As the push rod 29 continues to move downward, the baffle 24 is pushed to one side under the extrusion of the push rod 29, and the third spring 25 is compressed. After the baffle 24 moves, it drives the second discharge port 27 located below to move to the inside of the first discharge port 23. When the electric telescopic rod 9 is retracted, the push rod 29 moves upward and disengages from the baffle 24. Under the action of the third spring 25, the baffle 24 is reset, making it convenient for the discharge chamber 26 to be refilled with coupling agent.

[0030] Specifically, two material discharge troughs 33 are symmetrically opened inside the guide plate 16, and the two material discharge troughs 33 are respectively located directly below the two first material discharge ports 23. Two guide plates 34 are symmetrically fixedly connected inside the guide plate 16, and the two guide plates 34 are respectively located below the two material discharge troughs 33. Both guide plates 34 are installed with a downward tilt.

[0031] Through the above technical solution, the coupling agent flowing down from the two first discharge ports 23 falls into the two discharge troughs 33 and flows along the two discharge troughs 33 to the two guide plates 34. After being transmitted by the two guide plates 34, the coupling agent flows to the top of the pipeline, facilitating contact between the probe 18 and the coupling agent.

[0032] Specifically, the inner walls of the two discharge troughs 33 are both configured to be arc-shaped, both sides of the guide block 17 are configured to be arc-shaped surfaces, and the top opening of the discharge trough 33 is larger than the bottom opening of the first discharge port 23 .

[0033] Through the above technical solution, the coupling agent transmitted through the two guide plates 34 falls on the top of the pipeline and is located between the inner walls of the guide plate 16. At this time, the guide plate 16 is controlled by the motor 4 to move laterally, driving the guide block 17 to move laterally. The guide block 17 that moves laterally can spread the coupling agent evenly on the top of the pipeline, making it easier for the probe 18 to perform lateral flaw detection on the pipeline.

[0034] Specifically, the outer wall of the support frame 2 is fixedly connected to the second mounting plate 35, and a cavity 7 is provided inside the support frame 2 and above the second mounting plate 35. The inner wall of the second mounting plate 35 is rotatably connected to a rotating shaft 36, and a roller paper 37 is installed on the outer wall of the rotating shaft 36. A linkage component is provided between the rotating shaft 36 and the fixed plate 10.

[0035] With the above technical solution, after the inspection is completed, the motor 4 controls the probe 18 to move laterally to the far left. At this time, the linkage assembly drives the rotating shaft 36 to rotate counterclockwise, causing the paper roll 37 to rotate counterclockwise. As the paper roll 37 rotates counterclockwise, the paper is released and laid on the second mounting plate 35. When the probe 18 passes the second mounting plate 35, the coupling agent on the probe 18 can be wiped by the paper, preventing the coupling agent used during the inspection from remaining on the probe 18.

[0036] Specifically, the linkage assembly includes two connecting rods 41, and the two connecting rods 41 are symmetrically fixedly installed on the bottom of the fixed plate 10. The bottoms of the two connecting rods 41 are fixedly connected to the mounting brackets 42. The inner walls of the two mounting brackets 42 are slidably connected to the racks 43. A fifth spring 44 is provided inside the mounting brackets 42 and on the top of the racks 43. Both ends of the rotating shaft 36 pass through the second mounting plate 35 and are fixedly connected to the gears 45. The two racks 43 can be respectively engaged with the two gears 45. The outer wall of the second mounting plate 35 is symmetrically fixedly connected to two positioning plates 46. The positioning plates 46 are The inner wall is slidably connected to a fourth sliding shaft 47, one end of the fourth sliding shaft 47 is fixedly connected to a check block 49, the outer wall of the fourth sliding shaft 47 is sleeved with a sixth spring 48, the check block 49 is used in conjunction with the gear 45, the top of the check block 49 is set as an inclined surface, the bottom of the check block 49 is set as a straight surface, the side of the teeth of the gear 45 close to the bottom of the check block 49 is set as a straight surface, the side of the teeth of the gear 45 close to the top of the check block 49 is set as an inclined surface, the side of the teeth of the rack 43 close to the gear 45 is set as a straight surface, and the side of the teeth of the rack 43 far from the gear 45 is set as an inclined surface.

[0037] Through the above technical solution, the motor 4 controls the fixed plate 10 to move horizontally to the far left. When the fixed plate 10 moves, it drives the connecting rod 41 to move, so that the mounting frame 42 moves, and drives the rack 43 to move, so that the straight surface of the teeth of the rack 43 presses against the straight surface of the teeth of the gear 45, thereby pushing the gear 45 to rotate counterclockwise. When the gear 45 rotates counterclockwise, the inclined surface of its teeth presses against the inclined surface of the check block 49, thereby pushing the check block 49 to move and compressing the sixth spring 48. When the rack 43 is engaged with the gear 45, as the rack 43 moves, the gear 45 can be driven to rotate counterclockwise. , causing the rotating shaft 36 to rotate counterclockwise. When the fixed plate 10 is moved to the right side to detect pipeline defects through the control of the motor 4, the straight surface of the check block 49 is pressed against the straight surface of the teeth of the gear 45 under the action of the sixth spring 48, so that the gear 45 cannot rotate, and the inclined surface of the teeth of the rack 43 is pressed against the inclined surface of the teeth of the gear 45. Under the pressure of the gear 45, the rack 43 moves upward, compressing the fifth spring 44. After moving upward, the rack 43 can move with the movement of the fixed plate 10. After the rack 43 moves away from the gear 45, the rack 43 can be reset under the action of the fifth spring 44.

[0038] Specifically, the inner wall of the second mounting plate 35 is slidably connected to the third sliding shaft 38, the top of the third sliding shaft 38 is fixedly connected to the support plate 40, the outer wall of the third sliding shaft 38 is sleeved with a fourth spring 39, and both sides of the support plate 40 are set as arc surfaces.

[0039] Through the above technical solution, the paper released by the roll paper 37 when it rotates counterclockwise falls on the support plate 40. When the guide block 17 moves laterally, its bottom is pressed against the curved surface of the side of the support plate 40, causing the support plate 40 to move downward and compress the fourth spring 39. Under the action of the fourth spring 39, the paper can be used in contact with the probe 18. When the probe 18 moves laterally, the paper can wipe the coupling agent on the probe 18.

[0040] An operating method for an ultrasonic flaw detection device for internal defects in pipelines is provided. The operating method is applicable to the aforementioned ultrasonic flaw detection device for internal defects in pipelines. The steps of the method are as follows: S1: The pipe to be inspected is clamped and fixed by the clamping member 50, and coupling agent is pre-deposited in the liquid storage chamber 19; S2: The probe 18 is controlled to move downward by the electric telescopic rod 9 so that the probe 18 is close to the outer shell of the pipe. The probe 18 emits ultrasonic waves to detect flaws inside the pipe. While the probe 18 moves downward, the coupling agent in the feeding chamber 16 is applied to the pipe. S3: The motor 4 is used to control the probe 18 to move horizontally so that the probe 18 can detect flaws at different positions of the pipeline. When the probe 18 is controlled to move to the leftmost side, the linkage assembly is used to release the roller paper 37 to wipe the coupling agent on the probe 18 after the flaw detection.

[0041] During use, the coupling agent is loaded into the liquid storage chamber 19 and below the lower pressure plate 20. Under the action of the second spring 22, the lower pressure plate 20 is continuously moved downward, so that the coupling agent is discharged along the first discharge port 23 and enters the discharge chamber 26 along the second discharge port 27 located above. At this time, the second discharge port 27 located below is blocked, so that the coupling agent is stored in the discharge chamber 26. The pipe to be inspected is clamped and fixed by the clamping member 50. The electric telescopic rod 9 is started to move the first mounting plate 12 downward, driving the guide plate 16 to move downward, driving the guide block 17 to move downward, driving the probe 18 to move downward, so that the probe 18 is close to the outer shell of the pipe, and the probe 18 emits ultrasonic waves to detect the inside of the pipe. After the probe 18 is close to the pipe, the first slide The shaft 13 slides in the first mounting plate 12, compressing the first spring 14. The provision of the first spring 14 not only prevents the probe 18 from being damaged by a rigid collision with the pipeline, but also facilitates the probe 18 to always fit the pipeline. When the electric telescopic rod 9 controls the guide plate 16 to move downward, it drives the first bracket 30 to move downward, the second bracket 31 to move downward, and the third bracket 32 to move downward, so that the push rod 29 moves downward. At this time, the push rod 29 slides in the liquid storage box 11 and presses against the inclined groove 28 at the top of the baffle 24. As the push rod 29 continues to move downward, the baffle 24 is pushed to one side under the pressure of the push rod 29, compressing the third spring 25. After the baffle 24 moves, it drives the second discharge port 27 located below to move to the inside of the first discharge port 23. The coupling agent in the discharge chamber 26 flows downward along the inclined surface at the bottom of the discharge chamber 26 and falls into the two discharge troughs 33, and flows along the two discharge troughs 33 to the two guide plates 34. After being transmitted by the two guide plates 34, the coupling agent flows to the top of the pipeline, which is convenient for the probe 18 to contact the coupling agent, so that the ultrasonic wave can be better transmitted between the probe 18 and the pipeline. The coupling agent transmitted through the two guide plates 34 falls on the top of the pipeline and is located between the inner walls of the guide plates 16. The motor 4 is started to drive the screw rod 5 to rotate, so that the slider 6 moves, and the slide plate 8 moves, which is convenient for adjusting the lateral position of the probe 18, and can detect flaws in different positions of the pipeline. After the motor 4 is started, the guide plate 16 moves laterally, which drives the guide block 17 to move laterally. The movable guide block 17 can spread the coupling agent evenly on the top of the pipeline, making it easier for the probe 18 to perform horizontal flaw detection on the pipeline. After the inspection is completed, the electric telescopic rod 9 is retracted, and the fixed plate 10 is controlled by the motor 4 to move horizontally to the leftmost side. When the fixed plate 10 moves, it drives the connecting rod 41 to move, so that the mounting bracket 42 moves, and drives the rack 43 to move, so that the straight surface of the teeth of the rack 43 presses against the straight surface of the teeth of the gear 45, thereby pushing the gear 45 to rotate counterclockwise. When the gear 45 rotates counterclockwise, the inclined surface of its teeth presses against the inclined surface of the check block 49, thereby pushing the check block 49 to move and compressing the sixth spring 48. When the rack 43 is engaged with the gear 45, as the rack 43 moves, the gear 45 can be driven to rotate counterclockwise, causing the rotating shaft 36 to rotate counterclockwise.The roller paper 37 is driven to rotate counterclockwise, and the roller paper 37 releases the paper while rotating counterclockwise, so that the paper is laid on the support plate 40. When the guide block 17 passes by, its bottom is pressed against the arc surface of the side of the support plate 40, so that the support plate 40 moves downward, pressing the fourth spring 39. Under the action of the fourth spring 39, the paper can be used in contact with the probe 18. When the probe 18 moves horizontally, the coupling agent on the probe 18 can be wiped by the paper. When the fixed plate 10 is controlled to move to the right by the motor 4, During pipeline inspection, the sixth spring 48 forces the straight surface of the check block 49 against the straight surface of the gear 45 teeth, preventing the gear 45 from rotating. The inclined surface of the rack 43 teeth presses against the inclined surface of the gear 45 teeth. This forces the rack 43 upward, compressing the fifth spring 44. After moving upward, the rack 43 can follow the movement of the fixed plate 10. After the rack 43 moves away from the gear 45, the fifth spring 44 resets the rack 43.

[0042] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0043] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the scope of protection of the present invention.

[0044] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic flaw detection device for internal defects of pipelines, characterized in that: The invention comprises a base (1), wherein the top of the base (1) is fixedly connected to a support frame (2), one side of the support frame (2) is fixedly connected to a fixing frame (3), the outer wall of the fixing frame (3) is fixedly connected to a motor (4), the output end of the motor (4) extends to the interior of the fixing frame (3) and is fixedly connected to a lead screw (5), the outer wall of the lead screw (5) is connected to a slider (6) via a lead screw nut pair, the slider (6) is slidably connected to the fixing frame (3), the bottom of the slider (6) is fixedly connected to a slide plate (8), the bottom of the slide plate (8) is fixedly connected to an electric telescopic rod (9), and the The output end of the electric telescopic rod (9) is fixedly connected to a first mounting plate (12), the inner wall of the first mounting plate (12) is slidably connected to a first sliding shaft (13), the bottom of the first sliding shaft (13) is fixedly connected to a guide plate (16), the top of the first sliding shaft (13) is fixedly connected to a limit block (15), the outer wall of the first sliding shaft (13) is sleeved with a first spring (14), the inner wall of the guide plate (16) is fixedly connected to a guide block (17), the bottom of the guide block (17) is installed with a probe (18), and the top of the base (1) is installed with a clamping member (50).

2. The ultrasonic flaw detection equipment for internal defects of pipelines according to claim 1, characterized in that: The outer wall of the electric telescopic rod (9) is fixedly connected to a fixed plate (10), and the bottom of the fixed plate (10) is symmetrically fixedly connected to two liquid storage boxes (11), and the inner wall of the liquid storage box (11) is provided with a liquid storage cavity (19), and the bottom of the inner wall of the liquid storage cavity (19) is set as an inclined surface, and the top of the inner wall of the liquid storage cavity (19) is fixedly connected to a second sliding shaft (21), and the outer wall of the second sliding shaft (21) is slidably connected to a lower pressure plate (20), and the lower pressure plate (20) is slidably connected to the liquid storage cavity (19), and a second spring (22) is sleeved on the outer wall of the second sliding shaft (21) and located above the lower pressure plate (20), and a first discharge port (23) is provided inside the liquid storage box (11) and at the bottom of the liquid storage cavity (19), and a discharge assembly is provided inside the liquid storage box (11).

3. The ultrasonic flaw detection equipment for internal defects of pipelines according to claim 2, characterized in that: The blanking assembly includes a baffle (24), which is installed inside the liquid storage box (11) and is slidably connected to the liquid storage box (11). The baffle (24) is located below the liquid storage cavity (19). A blanking cavity (26) is provided inside the baffle (24). The bottom of the inner wall of the blanking cavity (26) is set as an inclined surface. A second blanking port (27) is provided at the top and the bottom of the blanking cavity (26). The second blanking port (27) located above is inside the first blanking port (23). The second blanking port (27) located below is staggered with the first blanking port (23). The outer wall of the guide plate (16) is provided with a linkage unit used in conjunction with the baffle (24).

4. The ultrasonic flaw detection equipment for internal defects of pipelines according to claim 3, characterized in that: The linkage unit includes two first brackets (30), the two first brackets (30) are symmetrically fixedly installed on the outer wall of the guide plate (16), the tops of the two first brackets (30) are fixedly connected to the second bracket (31), one side of the two second brackets (31) is fixedly connected to the third bracket (32), the bottoms of the two third brackets (32) are fixedly connected to the top rod (29), the two top rods (29) extend to the interior of the two liquid storage boxes (11), the top rods (29) are slidably connected to the liquid storage boxes (11), one end of the baffle (24) is fixedly connected to the third spring (25), one end of the third spring (25) is fixedly connected to the liquid storage box (11), the top of the baffle (24) is provided with an inclined groove (28) used to cooperate with the top rod (29), the baffle (24) and the interior of the liquid storage box (11) are provided with a through groove, and the top rod (29) slides through the two through grooves.

5. The ultrasonic flaw detection equipment for internal defects of pipelines according to claim 4, characterized in that: Two material discharge troughs (33) are symmetrically provided inside the guide plate (16), and the two material discharge troughs (33) are respectively located directly below the two first material discharge openings (23). Two guide plates (34) are symmetrically fixedly connected inside the guide plate (16), and the two guide plates (34) are respectively located below the two material discharge troughs (33). Both guide plates (34) are installed with a downward tilt.

6. The ultrasonic flaw detection equipment for internal defects of pipelines according to claim 5, characterized in that: The inner walls of the two feeding troughs (33) are both configured to be arc-shaped, both sides of the guide block (17) are configured to be arc-shaped surfaces, and the top opening of the feeding trough (33) is larger than the bottom opening of the first feeding port (23).

7. The ultrasonic flaw detection equipment for internal defects of pipelines according to claim 6, characterized in that: The outer wall of the support frame (2) is fixedly connected to a second mounting plate (35); a cavity (7) is provided inside the support frame (2) and above the second mounting plate (35); the inner wall of the second mounting plate (35) is rotatably connected to a rotating shaft (36); a roller paper (37) is mounted on the outer wall of the rotating shaft (36); and a linkage assembly is provided between the rotating shaft (36) and the fixed plate (10).

8. The ultrasonic flaw detection equipment for internal defects of pipelines according to claim 7, characterized in that: The linkage assembly includes two connecting rods (41), the two connecting rods (41) are symmetrically fixedly installed on the bottom of the fixed plate (10), the bottoms of the two connecting rods (41) are fixedly connected to the mounting frame (42), the inner walls of the two mounting frames (42) are slidably connected to the racks (43), and a fifth spring (44) is provided inside the mounting frame (42) and on the top of the racks (43). Both ends of the rotating shaft (36) pass through the second mounting plate (35) and are fixedly connected to the gears (45). The two racks (43) can be respectively engaged with the two gears (45). The outer wall of the second mounting plate (35) is symmetrically fixedly connected to two positioning plates (46). The inner wall of the positioning plate (46) is fixedly connected to the second mounting plate (35). The wall is slidably connected to a fourth sliding shaft (47), one end of the fourth sliding shaft (47) is fixedly connected to a check block (49), the outer wall of the fourth sliding shaft (47) is provided with a sixth spring (48), the check block (49) is used in conjunction with the gear (45), the top of the check block (49) is set as an inclined surface, the bottom of the check block (49) is set as a straight surface, the side of the teeth of the gear (45) close to the bottom of the check block (49) is set as a straight surface, the side of the teeth of the gear (45) close to the top of the check block (49) is set as an inclined surface, the side of the teeth of the rack (43) close to the gear (45) is set as a straight surface, and the side of the teeth of the rack (43) far from the gear (45) is set as an inclined surface.

9. The ultrasonic flaw detection equipment for internal defects of pipelines according to claim 8, characterized in that: The inner wall of the second mounting plate (35) is slidably connected to a third sliding shaft (38), the top of the third sliding shaft (38) is fixedly connected to a support plate (40), the outer wall of the third sliding shaft (38) is sleeved with a fourth spring (39), and both sides of the support plate (40) are arranged as arc surfaces.

10. The method for operating an ultrasonic flaw detection device for internal defects in pipelines according to claim 9, characterized in that: The steps of this method are as follows: S1: The pipe to be inspected is clamped and fixed by the clamping member (50), and coupling agent is pre-deposited in the liquid storage chamber (19); S2: The probe (18) is controlled to move downward by the electric telescopic rod (9), so that the probe (18) is closely attached to the outer shell of the pipeline, and ultrasonic waves are emitted by the probe (18) to detect flaws inside the pipeline. While the probe (18) is controlled to move downward, the coupling agent in the feeding chamber (16) is applied to the pipeline; S3: The probe (18) is controlled to move horizontally by the motor (4) so that the probe (18) can detect flaws at different positions of the pipeline. When the probe (18) is controlled to move to the leftmost side, the roller paper (37) is released in conjunction with the linkage assembly to wipe the coupling agent on the probe (18) after the flaw detection.

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