Ultrasonic nondestructive testing device for pipeline defects

Abstract

The invention relates to an ultrasonic nondestructive testing device for pipeline defects, which comprises a fixing ring, an annular groove is formed in one end face of the fixing ring, a sliding block is slidably connected in the annular groove, a mounting block is connected to one end, penetrating out of the annular groove, of the sliding block, and a mounting box is connected to one side, far away from the fixing ring, of the mounting block. A telescopic air cylinder is arranged on the side, away from the ring center of the fixing ring, of the mounting box, the telescopic end of the telescopic air cylinder movably penetrates through the mounting box to face the ring center of the fixing ring and is provided with a detection probe electrically connected with the ultrasonic detector, and a receding opening allowing the detection probe to movably penetrate through is formed in the side, facing the ring center of the fixing ring, of the mounting box; by arranging the fixing ring, the annular groove and the sliding block, the mounting block is pushed to slide along the annular groove, the detection probe is driven to rotate around the pipeline, the annular welding position of the pipeline is detected, and a worker does not need to hold the detection probe by hand to conduct detection around the pipeline.

Description

Technical Field

[0001] The invention relates to the technical field of ultrasonic detection, and in particular to an ultrasonic nondestructive detection device for pipeline defects. Background Art

[0002] Since each engineering pipeline is produced in a limited length, it needs to be welded during use to ensure that it reaches the appropriate length for use. After welding, the annular weld of the engineering pipeline needs to be non-destructively tested to ensure stability in use. Non-destructive testing refers to the use of sound, light, magnetism, electricity and other characteristics to detect whether there are defects or unevenness in the inspected object without damaging or affecting the performance of the inspected object, and to provide information such as the size, location, nature and quantity of the defects. Ultrasonic detection devices are usually used in the prior art to achieve non-destructive testing.

[0003] Ultrasonic testing refers to a physical non-destructive testing method that uses ultrasonic waves to directly detect internal defects on metal parts. When testing, the ultrasonic testing device sends ultrasonic waves to the metal parts through the ultrasonic probe, and locates the defects by using the directionality of the ultrasonic waves and the time required for the sound waves to return. There are metal defects such as bubbles and cracks in the metal parts. When the ultrasonic waves encounter different metal defects, the reflected sound waves will also show different physical acoustic phenomena. These physical acoustic signals are then converted into high-frequency electrical pulses by the ultrasonic probe, which can be displayed on the display screen. Finally, the defects are analyzed and characterized based on the characteristics of the reflected flaw detection pulses, thereby achieving non-destructive testing.

[0004] When using existing ultrasonic detection equipment for detection, it is necessary to hold a handheld ultrasonic detection probe and rotate it around the annular weld of the pipeline so that the ultrasonic detection probe can perform circumferential rotation detection around the axis of the pipeline. However, the handheld ultrasonic detection probe cannot ensure close contact between the detection probe and the pipeline when moving, causing the detection probe to separate from the pipeline, making the detection result inaccurate. At the same time, the detection personnel need to hold the detection probe for a long time, which causes great physical loss and increases the work intensity of the detection personnel. Summary of the invention

[0005] The purpose of the present invention is to provide an ultrasonic nondestructive testing device for pipeline defects, so as to solve the problem that the existing ultrasonic testing equipment needs to be held by the hand and rotated around the pipeline during testing, and the handheld ultrasonic testing equipment cannot ensure that the ultrasonic probe is in close contact with the pipeline when moving, causing the ultrasonic probe to separate from the pipeline, resulting in inaccurate testing results.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions: An ultrasonic nondestructive detection device for pipeline defects comprises a fixed ring, an annular groove is provided on the end surface of one end of the fixed ring, a sliding block is slidably connected in the annular groove, a mounting block is connected to the end of the sliding block passing through the annular groove, a mounting box is connected to the side of the mounting block away from the fixed ring, a telescopic cylinder is provided on the side of the mounting box away from the center of the fixed ring, the telescopic end of the telescopic cylinder movably passes through the mounting box and is arranged toward the center of the fixed ring, and a detection probe electrically connected to an ultrasonic detector is installed, a clearance opening for the detection probe to movably pass through is provided on the side of the mounting box facing the center of the fixed ring, and a fixing mechanism is provided on the end of the fixed ring away from the annular groove.

[0007] A further technical solution is that the fixed ring includes an upper fixed half ring and a lower fixed half ring, the left end of the upper fixed half ring is rotatably connected to the left end of the lower fixed half ring, a movable groove is provided on the right end face of the lower fixed half ring, and the movable groove is open near the outer side of the right end of the lower fixed half ring, a rotating block is rotatably connected in the movable groove, and the rotating block is connected to a connecting block parallel to the end face of the lower fixed half ring through a telescopic rebound component, an insertion groove is provided on the outer side of the right end of the upper fixed half ring, a connecting groove is provided on the groove wall on the side of the insertion groove close to the right end face of the upper fixed half ring, a yield channel connected to the connecting groove and the insertion groove is provided on the outer side of the right end of the upper fixed half ring, and the yield channel is open at one end close to the right end face of the upper fixed half ring.

[0008] A further technical solution is that the telescopic rebound assembly includes a sleeve, one end of the sleeve is connected to the rotating block, and a limiting ring is arranged around the inner wall of the other end. A tension spring is arranged in the sleeve, one end of the tension spring is fixedly connected to the rotating block, and the other end is connected to a support plate. A movable rod is connected to the side of the support plate away from the connecting block, and the end of the movable rod away from the support plate movably passes through the limiting ring and is fixedly connected to the connecting block.

[0009] A further technical solution is that a limiting block is convexly provided on the right end surface of the lower fixed semi-ring, and a limiting groove matched with the limiting block is opened on the right end surface of the upper fixed semi-ring.

[0010] A further technical solution is that a ring array of grooves is provided on the end surface of the fixing ring close to the mounting block, a mounting groove is provided on the side of the mounting block facing the fixing ring, a support spring is provided in the mounting groove, one end of the support spring is fixedly connected to the bottom of the mounting groove, and the other end is connected to a hemispherical protrusion, the spherical end of the hemispherical protrusion moves out of the mounting groove and is placed in one of the grooves.

[0011] A further technical solution is that a movable hole is opened on one side of the top of the mounting block, the movable hole is rotatably connected to a rotating rod through a bearing, a torsion spring is provided in the movable hole for resetting the rotating rod after rotation, one end of the rotating rod rotates out of the movable hole and is arranged toward the fixed ring, and is connected to a handle, the side of the handle close to the sliding block is connected to a driving block, the end of the driving block away from the handle is connected to a shielding plate, and the shielding plate rotates around the rotating rod as the axis to close the mounting groove.

[0012] A further technical solution is that a sliding cylinder is connected to a side of the installation box away from the fixed ring, and an installation ring is arranged around the inner wall of the end of the sliding cylinder away from the axis of the fixed ring. A sliding groove is opened in the middle of the inner wall of the sliding cylinder, and a sliding block is slidably connected in the sliding groove. The end of the sliding block facing the axis of the sliding cylinder is connected to the same connecting ring, and the end of the connecting ring facing the installing ring is connected to a connecting cylinder. The end of the connecting cylinder away from the connecting ring can be movably passed through the installing ring and placed in the outside world. A reset spring is sleeved on the outer side of the connecting cylinder, and the two ends of the reset spring are respectively connected to the connecting ring and the installing ring. A marking pen is connected to the inner thread of the connecting cylinder, and the tip of the marking pen can be movably passed through the sliding cylinder and arranged toward the axis of the fixed ring.

[0013] A further technical solution is that the fixing mechanism includes a bolt, a threaded hole is opened on the fixing ring and passes through the inside and outside of the fixing ring, the bolt is threadedly connected to the fixing ring through the threaded hole, and one end of the bolt placed on the inner side of the fixing ring is connected to a clamping block, and a silicone pad is provided on the side of the clamping block facing the axis of the fixing ring.

[0014] Compared with the prior art, the present invention has the following beneficial effects: By setting a fixed ring, an annular groove and a sliding block, the fixed ring is set on the outside of the pipeline and moved to the appropriate position that needs to be inspected, so that the detection probe is aligned with the annular weld that needs to be inspected, and the fixed ring is fixedly installed on the outside of the pipeline through a fixing mechanism. The telescopic end of the telescopic cylinder is controlled to extend and retract, and the detection probe is moved to a suitable position. Then the installation block is pushed to slide along the annular groove, driving the detection probe to rotate around the pipeline to inspect the annular welding part of the pipeline, so as to avoid the detection probe falling off the pipeline when the staff holds the detection probe to inspect around the pipeline, resulting in inaccurate detection structure. At the same time, the detection personnel do not need to hold the detection probe, thereby reducing the work intensity of the detection personnel. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The present invention is a schematic structural diagram of an ultrasonic nondestructive testing device for pipeline defects.

[0016] Figure 2 It is a schematic diagram of the split structure of the right end of the upper fixed half ring and the right end of the lower fixed half ring of the present invention.

[0017] Figure 3 It is a schematic diagram of the cross-sectional structure of the right end of the upper fixed half ring and the right end of the lower fixed half ring of the present invention.

[0018] Figure 4 It is a schematic cross-sectional structural diagram of the fixing ring, the mounting block and the mounting box of the present invention.

[0019] Figure 5 This is a schematic diagram of the structure of the mounting block, handle and shielding piece of the present invention.

[0020] Figure 6 It is a schematic diagram of the cross-sectional structure of the sliding cylinder and the connecting cylinder of the present invention.

[0021] Icons: 1-fixed ring, 2-circular ring groove, 3-sliding block, 4-mounting block, 5-mounting box, 6-telescopic cylinder, 7-detection probe, 8-allowance, 9-upper fixed half ring, 10-lower fixed half ring, 11-movable groove, 12-rotating block, 13-connecting block, 14-insertion groove, 15-connecting groove, 16-allowance channel, 17-sleeve, 18-limiting ring, 19-tension spring, 20-support plate, 21-movable rod, 22-limiting Position block, 23-limiting groove, 24-groove, 25-mounting groove, 26-support spring, 27-hemispherical protrusion, 28-movable hole, 29-bearing, 30-rotating rod, 31-torsion spring, 32-handle, 33-driving block, 34-shielding piece, 35-sliding cylinder, 36-sliding groove, 37-sliding block, 38-connecting ring, 39-connecting cylinder, 40-reset spring, 41-marker pen, 42-bolt, 43-clamping block, 44-mounting ring. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0023] Example 1 See also Figure 1 , Figure 4 It is shown that an ultrasonic nondestructive detection device for pipeline defects of the present invention comprises a fixed ring 1, a circular groove 2 is provided on the end surface of one end of the fixed ring 1, a sliding block 3 is slidably connected in the circular groove 2, a mounting block 4 is connected to the end of the sliding block 3 passing through the circular groove 2, a mounting box 5 is connected to the side of the mounting block 4 away from the fixed ring 1, a telescopic cylinder 6 is provided on the side of the mounting box 5 away from the center of the fixed ring 1, the telescopic end of the telescopic cylinder 6 movably passes through the mounting box 5 and is arranged toward the center of the fixed ring 1, and a detection probe 7 electrically connected to an ultrasonic detector is installed, a make way opening 8 for the detection probe 7 to movably pass through is provided on the side of the mounting box 5 facing the center of the fixed ring 1, and a fixing mechanism is provided on the end of the fixed ring 1 away from the circular groove 2.

[0024] During use of this embodiment, the fixing ring 1 is sleeved on the outside of the pipeline and moved to the appropriate position to be inspected, so that the detection probe 7 is aligned with the annular weld to be inspected, and the fixing ring 1 is fixedly installed on the outside of the pipeline through the fixing mechanism, and the telescopic end of the telescopic cylinder 6 is controlled to extend and retract, and the detection probe 7 is moved to the appropriate position, and then the mounting block 4 is pushed to slide along the annular groove 2, driving the detection probe 7 to rotate around the pipeline, and the annular weld of the pipeline is inspected, so as to avoid the detection probe 7 falling off the pipeline when the staff holds the detection probe 7 around the pipeline for inspection, resulting in inaccurate detection structure, and at the same time, the detection personnel do not need to hold the detection probe, reducing the work intensity of the detection personnel. Among them, applying coupling agent before detection, and the detection probe 7 and the ultrasonic detector are used for detection, which are both limit technologies, and will not be repeated here.

[0025] Example 2 Based on the above embodiments, see Figures 1 to 3 As shown, the fixing ring 1 includes an upper fixing half ring 9 and a lower fixing half ring 10, the left end of the upper fixing half ring 9 is rotatably connected to the left end of the lower fixing half ring 10, a movable groove 11 is provided on the right end face of the lower fixing half ring 10, and the movable groove 11 is open near the right end outer side of the lower fixing half ring 10, a rotating block 12 is rotatably connected in the movable groove 11, and a connecting block 13 parallel to the end face of the lower fixing half ring 10 is connected to the rotating block 12 through a telescopic rebound component, an inserting groove 14 is provided on the right end outer side of the upper fixing half ring 9, a connecting groove 15 is provided on the groove wall of the inserting groove 14 on one side close to the right end face of the upper fixing half ring 9, a clearance channel 16 connected to the connecting groove 15 and the inserting groove 14 is provided on the right end outer side of the upper fixing half ring 9, and the clearance channel 16 is open at one end close to the right end face of the upper fixing half ring 9.

[0026] During use of the present invention, the fixing ring 1 is formed by the upper fixing half ring 9 and the lower fixing half ring 10. When the pipeline is inspected, the left end of the lower fixing half ring 10 and the left end of the upper fixing half ring 9 are rotated relative to each other, and the right end of the upper fixing half ring 9 and the right end of the lower fixing half ring 10 are separated and sleeved on a suitable position outside the pipeline, and then the left end of the lower fixing half ring 10 and the left end of the upper fixing half ring 9 are rotated relative to each other, so that the right end of the lower fixing half ring 10 and the right end of the upper fixing half ring 9 are brought closer, and the connecting block 13 is pulled to extend the telescopic rebound component. With the cooperation of the rotating block 12, the connecting block 13 is slided into the insertion hole, and the connecting block 13 is loosened. The telescopic rebound component retracts and drives the connecting block 13 to slide into the connecting groove 15, so that the right end of the upper fixing half ring 9 and the right end of the lower fixing half ring 10 are tightly fitted, so that the upper fixing half ring 9 and the lower fixing half ring The ring 10 is assembled as a fixed ring 1. When it needs to be disassembled, the connecting block 13 is pushed to extend the telescopic rebound component, so that the connecting block 13 slides from the connecting groove 15 into the insertion groove 14, and then the connecting block 13 is pulled to rotate the connecting block 13 with the rotating block 12 as the axis, so that the connecting block 13 slides out of the insertion groove 14, that is, the connection between the right end of the upper fixed semi-ring 9 and the right end of the lower fixed semi-ring 10 is cancelled, and the left end of the upper fixed semi-ring 9 and the left end of the lower fixed semi-ring 10 are rotated with each other, so that the upper fixed semi-ring 9 and the lower fixed semi-ring 10 can be removed from the outside of the pipeline. By arranging the upper fixed semi-ring 9, the lower fixed semi-ring 10, the connecting block 13, the telescopic rebound component and the connecting groove 15, it is convenient to quickly assemble the upper fixed semi-ring 9 and the lower fixed semi-ring 10 into the fixed ring 1 and sleeve it on the outside of the pipeline. At the same time, no other auxiliary tools are required during disassembly, thereby improving the portability of the device.

[0027] As a preferred implementation of this embodiment, refer to Figure 2 , Figure 3As shown, the telescopic rebound component includes a sleeve 17, one end of the sleeve 17 is connected to the rotating block 12, and a limiting ring 18 is arranged around the inner wall of the other end. A tension spring 19 is arranged in the sleeve 17, one end of the tension spring 19 is fixedly connected to the rotating block 12, and the other end is connected to a support sheet 20. It should be noted that the outer ring diameter of the support sheet 20 is larger than the inner ring diameter of the limiting ring 18, and the inner ring diameter of the limiting ring 18 is larger than the outer ring diameter of the movable rod 21. A movable rod 21 is connected to the side of the support sheet 20 away from the connecting block 13, and the end of the movable rod 21 away from the support sheet 20 movably passes through the limiting ring 18 and is fixedly connected to the connecting block 13. When in use, when the connecting block 13 is pulled, the movable rod 21 slides along the sleeve 17 in the direction away from the rotating block 12, and the movable rod 21 slides and pulls the tension spring 19, so that the tension spring 19 stretches. When the connecting block 13 is released, the tension spring 19 drives the movable rod 21 to move closer to the rotating block 12 under the action of elastic potential energy. Under the action of the tension spring 19, the connecting block 13 is stably placed in the connecting groove 15, ensuring that the right end of the upper fixed semi-ring 9 and the right end of the lower fixed semi-ring 10 are tightly fitted and not separated. By setting the limit ring 18 and the support plate 20, the movable rod 21 can be prevented from completely sliding out of the sleeve 17.

[0028] As a preferred implementation of this embodiment, refer to Figure 2 , Figure 3 As shown, a limit block 22 is convexly provided on the right end face of the lower fixed semi-ring 10, and a limit groove 23 adapted to the limit block 22 is opened on the right end face of the upper fixed semi-ring 9. By setting the limit block 22 and the limit groove 23, when the right end of the upper fixed semi-ring 9 and the right end of the lower fixed semi-ring 10 are tightly fitted, the limit block 22 is placed in the limit groove 23, which can avoid the right end of the upper fixed semi-ring 9 and the right end of the lower fixed semi-ring 10 from sliding and misaligning with each other, and further ensure the stability of the connection between the right end of the upper fixed semi-ring 9 and the right end of the lower fixed semi-ring 10.

[0029] Example 3 Based on the above embodiments, see Figure 1 , Figure 4 and Figure 5 As shown, a ring array of grooves 24 are provided on the end surface of the fixing ring 1 close to the mounting block 4, a mounting groove 25 is provided on the side of the mounting block 4 facing the fixing ring 1, a supporting spring 26 is provided in the mounting groove 25, one end of the supporting spring 26 is fixedly connected to the bottom of the mounting groove 25, and the other end is connected to a hemispherical protrusion 27, the spherical end of the hemispherical protrusion 27 is movable through the mounting groove 25 and is placed in one of the grooves 24.

[0030] During use of the present solution, by setting the hemispherical protrusion 27 and the groove 24, the mounting block 4 is pushed to slide along the annular groove 2. When the detection probe 7 is driven to rotate around the pipeline, the groove wall of the groove 24 squeezes the hemispherical protrusion 27, so that the hemispherical protrusion 27 retracts into the mounting groove 25, ensuring that the sliding block 3 moves smoothly along the annular groove 2, thereby driving the detection probe 7 to rotate around the pipeline to detect the pipeline welding part. When the detection probe 7 detects that there is a problem at the pipeline welding part and needs to be recorded, the mounting block 4 is no longer pushed. When the hemispherical protrusion 27 is retracted into the mounting groove 25, it will squeeze the supporting spring 26. At this time, the hemispherical protrusion 27 is placed in one of the grooves 24 under the action of the supporting spring 26, so as to limit the mounting block 4, so that the sliding block 3 will not slide along the annular groove 2. At this time, the staff's hands can leave the device, which is convenient for marking and recording the places with problems for subsequent maintenance, thereby improving the practicality of the device.

[0031] As a preferred implementation of this embodiment, refer to Figure 1 , Figure 4 and Figure 5 As shown, a movable hole 28 is opened on one side of the top of the mounting block 4, and the movable hole 28 is rotatably connected to the rotating rod 30 through a bearing 29. A torsion spring 31 is arranged in the movable hole 28 for resetting the rotating rod 30 after rotation. It should be noted that the torsion spring 31 is arranged in the movable hole 28 for resetting the rotating rod 30 after rotation, which belongs to the common technical common sense of technicians in the field, and technicians in the field can directly obtain the corresponding installation relationship and structure according to the common common sense. One end of the rotating rod 30 is rotated out of the movable hole 28 and is arranged toward the fixed ring 1, and is connected to a handle 32, and the handle 32 is close to the fixed ring 1. A driving block 33 is connected to one side of the sliding block 3, and a shielding piece 34 is connected to the end of the driving block 33 away from the handle 32. The shielding piece 34 rotates around the rotating rod 30 to close the mounting groove 25, wherein a limiting protrusion can be set at a suitable position on the side of the mounting block 4 facing the fixed ring 1 to limit the handle 32 to prevent the handle 32 from excessively rotating around the rotating rod 30, so that the shielding piece 34 cannot close the notch of the mounting groove 25, and at the same time, the distance between the mounting block 4 and the fixed ring 1 can ensure that the shielding piece 34 can slide smoothly to the notch of the mounting groove 25.

[0032] When in use, the handle 32 is pulled to drive the mounting block 4 to move, and the groove wall of the groove 24 squeezes the hemispherical protrusion 27, and the hemispherical protrusion 27 retracts into the mounting groove 25. Since the handle 32 is subjected to the pulling force, it will rotate around the rotating rod 30 as the axis, and the rotating rod 30 drives the driving block 33 to rotate around the rotating rod 30 as the axis, so that the shielding piece 34 moves to the notch of the mounting groove 25 to block the hemispherical protrusion 27, preventing the hemispherical protrusion 27 from sliding out of the mounting groove 25, and preventing the hemispherical protrusion 27 from repeatedly sliding in and out of the mounting groove 25 and repeatedly being placed when the mounting block 4 slides along the annular groove 2 under the action of the sliding block 3. The hemispherical protrusion 27 is inserted into the groove 24, affecting the smoothness of the sliding of the mounting block 4 under the cooperation of the sliding block 3 and the annular groove 2. When the detection probe 7 detects that there is a problem at the pipeline welding point and needs to be recorded, the handle 32 is released, and the rotating rod 30 is driven by the torsion spring 31 to rotate in the opposite direction to reset. The rotating rod 30 rotates to drive the driving block 33 to move so that the shielding piece 34 is removed from the notch of the mounting groove 25, and the hemispherical protrusion 27 is no longer blocked. The hemispherical protrusion 27 slides out of the mounting groove 25 under the action of the supporting spring 26 and is placed in one of the grooves 24, thereby limiting the sliding block 3.

[0033] As a preferred implementation of this embodiment, refer to Figure 1 , Figure 4 and Figure 6 As shown, a sliding cylinder 35 is connected to the side of the installation box 5 away from the fixed ring 1, and a mounting ring 44 is arranged around the inner wall of the end of the sliding cylinder 35 away from the axis of the fixed ring 1. A sliding groove 36 is opened in the middle of the inner wall of the sliding cylinder 35, and a sliding block 37 is slidably connected in the sliding groove 36. The end of the sliding block 37 facing the axis of the sliding cylinder 35 is connected to the same connecting ring 38, and the end of the connecting ring 38 facing the mounting ring 44 is connected to a connecting cylinder 39. The end of the connecting cylinder 39 away from the connecting ring 38 is movable through the mounting ring 44 and placed in the outside. A reset spring 40 is sleeved on the outer side of the connecting cylinder 39, and the two ends of the reset spring 40 are respectively connected to the connecting ring 38 and the mounting ring 44. A marking pen 41 is connected to the inner thread of the connecting cylinder 39, and the tip of the marking pen 41 is movable through the sliding cylinder 35 and arranged toward the axis of the fixed ring 1.

[0034] By means of the above structure, when in use, when the detection probe 7 detects that there is a problem at the pipeline welding point and needs to be recorded, the handle 32 is released, the hemispherical protrusion 27 slides out of the installation groove 25 and is placed in the groove 24, the installation block 4 is limited, and the connecting tube 39 is pressed downward. When the connecting tube 39 moves downward, it drives the marking pen 41 to move downward, so that the marking pen 41 contacts the side of the defective position of the pipeline, and then the marking pen 41 can be used to quickly mark the defective position. When the marking is completed, under the action of the reset spring 40, the connecting tube 39 drives the tip of the marking pen 41 to move in the direction away from the axial center of the fixing ring 1, so that the tip of the marking pen 41 no longer contacts the outer wall of the pipeline, avoiding erroneous marking. The marking pen 41 is connected to the connecting tube 39 by a threaded connection. When facing different pipe diameters, it is convenient to adjust the length of the tip of the marking pen 41 extending out of the sliding tube 35 to ensure that when the connecting tube 39 is pressed, the tip of the marking pen 41 can contact the outer wall of the pipeline for marking.

[0035] Example 4 Based on the above embodiments, see Figure 1 As shown, the fixing mechanism includes a bolt 42, and a threaded hole penetrating the inner and outer sides of the fixing ring 1 is provided on the fixing ring 1. The bolt 42 is threadedly connected to the fixing ring 1 through the threaded hole, and a clamping block 43 is connected to one end of the bolt 42 placed on the inner side of the fixing ring 1. A silicone pad is provided on the side of the clamping block 43 facing the axis of the fixing ring 1. In actual use, by rotating the bolt 42, the clamping block 43 is brought close to the pipeline and clamps the pipeline, thereby fixing the fixing ring 1 on the outer side of the pipeline. By providing the silicone pad, the stability of the contact between the clamping block 43 and the pipeline is improved. By providing the bolt 42 and the clamping block 43, it is convenient to fix pipelines of different diameters, thereby improving the practicality of the device.

[0036] Although the present invention is described herein with reference to a number of illustrative embodiments of the present invention, it will be appreciated that those skilled in the art may devise many other modifications and implementations that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, drawings, and claims, a variety of variations and modifications may be made to the components and / or layout of the subject combination layout. In addition to the variations and modifications made to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. An ultrasonic nondestructive testing device for pipeline defects, comprising a fixing ring (1), characterized in that: A circular groove (2) is provided on an end surface of one end of the fixed ring (1), a sliding block (3) is slidably connected in the circular groove (2), a mounting block (4) is connected to one end of the sliding block (3) passing through the circular groove (2), a mounting box (5) is connected to the side of the mounting block (4) away from the fixed ring (1), a telescopic cylinder (6) is provided on the side of the mounting box (5) away from the ring center of the fixed ring (1), the telescopic end of the telescopic cylinder (6) movably passes through the mounting box (5) and is arranged toward the ring center of the fixed ring (1), and a detection probe (7) electrically connected to an ultrasonic detector is installed, a clearance opening (8) for the detection probe (7) to movably pass through is provided on the side of the mounting box (5) facing the ring center of the fixed ring (1), and a fixing mechanism is provided on the end of the fixed ring (1) away from the circular groove (2).

2. The ultrasonic nondestructive testing device for pipeline defects according to claim 1 is characterized in that: The fixing ring (1) comprises an upper fixing half ring (9) and a lower fixing half ring (10), the left end of the upper fixing half ring (9) is rotatably connected to the left end of the lower fixing half ring (10), a movable groove (11) is provided on the right end surface of the lower fixing half ring (10), and the movable groove (11) is open near the right end of the lower fixing half ring (10), a rotating block (12) is rotatably connected in the movable groove (11), and the rotating block (12) is connected to the lower fixing half ring through a telescopic rebound component. (10) a connecting block (13) with end faces parallel to each other, an insertion groove (14) is provided on the outer side of the right end of the upper fixed semi-ring (9), a connecting groove (15) is provided on the groove wall of the insertion groove (14) on the side close to the end face of the right end of the upper fixed semi-ring (9), a clearance channel (16) connected to the connecting groove (15) and the insertion groove (14) is provided on the outer side of the right end of the upper fixed semi-ring (9), and the clearance channel (16) is opened at one end close to the end face of the right end of the upper fixed semi-ring (9).

3. The ultrasonic nondestructive testing device for pipeline defects according to claim 2 is characterized in that: The telescopic rebound component comprises a sleeve (17), one end of the sleeve (17) is connected to the rotating block (12), and a limiting ring (18) is arranged around the inner wall of the other end. A tension spring (19) is arranged in the sleeve (17), one end of the tension spring (19) is fixedly connected to the rotating block (12), and the other end is connected to a support plate (20), and a movable rod (21) is connected to the side of the support plate (20) away from the connecting block (13), and the end of the movable rod (21) away from the support plate (20) movably passes through the limiting ring (18) and is fixedly connected to the connecting block (13).

4. The ultrasonic nondestructive testing device for pipeline defects according to claim 3 is characterized in that: A stop block (22) is convexly provided on the right end surface of the lower fixed half ring (10), and a stop groove (23) adapted to the stop block (22) is provided on the right end surface of the upper fixed half ring (9).

5. The ultrasonic nondestructive testing device for pipeline defects according to claim 1 is characterized in that: An end surface of the fixing ring (1) close to the mounting block (4) is provided with grooves (24) in an annular array, and a mounting groove (25) is provided on a side of the mounting block (4) facing the fixing ring (1). A support spring (26) is provided in the mounting groove (25), one end of the support spring (26) is fixedly connected to the bottom of the mounting groove (25), and the other end is connected to a hemispherical protrusion (27), and the spherical end of the hemispherical protrusion (27) movably passes through the mounting groove (25) and is placed in one of the grooves (24).

6. The ultrasonic nondestructive testing device for pipeline defects according to claim 5, characterized in that: A movable hole (28) is provided on one side of the top of the mounting block (4); the movable hole (28) is rotatably connected to a rotating rod (30) via a bearing (29); a torsion spring (31) is provided in the movable hole (28) for resetting the rotating rod (30) after rotation; one end of the rotating rod (30) is rotated to pass through the movable hole (28) and is arranged toward the fixing ring (1) and is connected to a handle (32); a side of the handle (32) close to the sliding block (3) is connected to a driving block (33); an end of the driving block (33) away from the handle (32) is connected to a shielding sheet (34); the shielding sheet (34) rotates around the rotating rod (30) as an axis to close the mounting slot (25).

7. The ultrasonic nondestructive testing device for pipeline defects according to claim 6, characterized in that: A sliding cylinder (35) is connected to a side of the installation box (5) away from the fixing ring (1) with one end thereof facing the axis of the fixing ring (1). A mounting ring (44) is arranged around the inner wall of the end of the sliding cylinder (35) away from the axis of the fixing ring (1). A sliding groove (36) is provided in the middle of the inner wall of the sliding cylinder (35). A sliding block (37) is slidably connected in the sliding groove (36). The end of the sliding block (37) facing the axis of the sliding cylinder (35) is connected to the same connecting ring (38). The connecting ring (38) faces the installation box (5). A connecting tube (39) is connected to one end of the mounting ring (44); an end of the connecting tube (39) away from the connecting ring (38) movably passes through the mounting ring (44) and is placed outside; a return spring (40) is sleeved on the outside of the connecting tube (39); two ends of the return spring (40) are respectively connected to the connecting ring (38) and the mounting ring (44); a marking pen (41) is connected to the inner thread of the connecting tube (39); a tip of the marking pen (41) movably passes through the sliding tube (35) and is arranged toward the axis of the fixing ring (1).

8. The ultrasonic nondestructive testing device for pipeline defects according to claim 1, characterized in that: The fixing mechanism comprises a bolt (42), the fixing ring (1) is provided with a threaded hole penetrating both the inner and outer sides thereof, the bolt (42) is threadedly connected to the fixing ring (1) via the threaded hole, and one end of the bolt (42) disposed inside the fixing ring (1) is connected to a clamping block (43), and a silicone pad is provided on a side of the clamping block (43) facing the axis of the fixing ring (1).

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