Pipeline ultrasonic guided wave detection system

Abstract

The invention relates to a pipeline ultrasonic guided wave detection system which comprises a plurality of detection units distributed in the circumferential direction of a pipeline, a tightening assembly is hinged between the head detection unit and the tail detection unit, a connecting assembly is hinged between the other adjacent detection units, each detection unit comprises a frame and a probe detachably fixed in the frame, and two supports are arranged on the two sides of the frame respectively. A guide rod is arranged in the support, a roller is mounted on the guide rod through a wheel carrier, a first spring is arranged between the wheel carrier and the support, the probe comprises a shell, and a bottom-layer insulating spacer, an annular permanent magnet, an upper-layer insulating spacer and a disc-shaped electromagnetic coil which are fixed in the shell, a rectangular hole is formed in the bottom wall of the shell, and strip-shaped stop blocks are arranged on the two sides of the rectangular hole respectively; the bottom insulation spacer is connected with a coupling patch through a flexible deformable body, the disc-shaped electromagnetic coil is connected with an industrial interface extending out of the shell, the flexible deformable body is made of silica gel, and the coupling patch is made of ferrocobalt. The device has the advantages of being simple in structure, convenient to operate and control, high in reliability and good in adaptability.

Description

Technical Field

[0001] The invention relates to a pipeline detection technology, and in particular to a pipeline ultrasonic guided wave detection system based on multiple probes. Background Art

[0002] Traditional ultrasonic guided wave detection technology has many problems in pipeline detection, such as insufficient independence of single probes, inconvenient separate disassembly and maintenance of probes, inflexible connection between probes, poor adaptability to different pipe diameters, and inability to quickly replace damaged probes. These problems have seriously affected the application effect and detection efficiency of ultrasonic guided wave detection technology. Summary of the invention

[0003] The object of the present invention is to provide a pipeline ultrasonic guided wave detection system, which has the advantages of simple structure, convenient operation, high reliability, good adaptability and strong practicality.

[0004] In order to solve the problems existing in the prior art, the present invention provides a pipeline ultrasonic guided wave detection system, comprising a plurality of detection units distributed along the circumference of the pipeline, except that the first and last detection units are hinged with a tightening assembly, and the other adjacent detection units are hinged with a connecting assembly, the detection unit comprises a frame and a probe detachably fixed in the frame, the frame is respectively provided with two spaced supports on both sides along the axial direction of the pipeline, the supports are provided with guide rods slidably matched therewith, the guide rods are provided with rollers supported on the pipeline through a wheel frame, a first spring is provided between the wheel frame and the supports, the probe comprises a shell and a bottom insulating spacer, an annular permanent magnet, an upper insulating spacer and a disc-shaped electromagnetic coil fixed in the shell in sequence, a rectangular hole is provided on the bottom wall of the shell, and strip blocks are respectively provided on both sides of the rectangular hole along the circumference of the pipeline, the bottom insulating spacer is connected with a coupling patch located between the strip block and the pipeline through a flexible deformation body, the disc-shaped electromagnetic coil comprises a transmitting coil and a receiving coil and is connected with two industrial interfaces extending out of the shell, the flexible deformation body is made of silicone, and the coupling patch is made of iron-cobalt alloy.

[0005] Furthermore, the present invention provides a pipeline ultrasonic guided wave detection system, wherein guide grooves are respectively provided on the inner sides of the four side walls of the frame, the bottom of the guide groove is a limit platform, a second spring is installed in the limit platform through a groove, and locking plates are respectively provided on the top of the frame corresponding to the guide groove, one end of the locking plate is rotatably mounted on the frame on one side of the guide groove by a bolt, a clamping head is provided in the middle of the locking plate, a hand screw is installed on the other end of the locking plate, and a threaded hole matching the hand screw is provided on the frame, the shell includes a shell body and a cover plate, guide blocks matching the guide grooves are respectively provided on the outer sides of the four side walls of the shell body, the cover plate is fixed to the shell body by fastening screws corresponding to the guide blocks, and a limiting ring groove matching the clamping head is provided at a position where the fastening screw is flush with the cover plate.

[0006] Furthermore, the present invention provides a pipeline ultrasonic guided wave detection system, wherein the tightening assembly includes a first adapter and a second adapter corresponding to the head and tail detection unit frames, the first adapter is connected to two bracket plates distributed at intervals, a rotating shaft is installed between the two bracket plates, a connecting hole is provided on the rotating shaft, a crank and a ratchet are fixed to the two ends of the rotating shaft respectively, a pawl cooperating with the ratchet is provided on the outer side of one bracket plate, the middle part of the pawl is hinged to the bracket plate, a lever is provided at the end of the pawl away from the ratchet, a coil spring is provided on the bracket plate on one side of the pawl through a supporting screw sleeve, one end of the coil spring is inserted into the limiting hole on the bracket plate, and the other end of the coil spring is squeezed on the pawl, and a connecting belt cooperating with the rotating shaft is fixed on the second adapter.

[0007] Furthermore, the present invention provides a pipeline ultrasonic guided wave detection system, wherein the connecting assembly includes two basket bolts and two connecting elastic supply-aiding belts, the two basket bolts are spaced apart along the axial direction of the pipeline, the two ends of the basket bolts are correspondingly hinged to the frames of adjacent detection units, the connecting elastic supply-aiding belt is made of rubber bands and its two ends are correspondingly fixedly connected to the frames of adjacent detection units, and the two connecting elastic supply-aiding belts are correspondingly located on the outside of the two basket bolts relative to the center of the pipeline.

[0008] Furthermore, the present invention provides a pipeline ultrasonic guided wave detection system, wherein the first adapter includes two first adapter rods, the two first adapter rods are spaced apart along the axial direction of the pipeline and hinged to the frame of the first detection unit, a first support shaft is installed between the two first adapter rods, the two bracket plates are respectively clamped on the first support shafts on the inner sides of the two first adapter rods through axial holes, the second adapter includes two second adapter rods corresponding to the first adapter rods one by one, the two second adapter rods are respectively hinged to the frame of the last detection unit, a second support shaft is installed between the two second adapter rods, and one end of the connecting belt is fixed on the second support shaft.

[0009] Furthermore, the present invention provides a pipeline ultrasonic guided wave detection system, wherein the first adapter also includes two first adapter elastic supply auxiliary belts made of rubber bands, the two first adapter elastic supply auxiliary belts are correspondingly located on the outside of the two first adapter rods relative to the center of the pipeline, one end of the first adapter elastic supply auxiliary belt is fixedly connected to the frame of the first detection unit, and the other end of the first adapter elastic supply auxiliary belt is fixedly connected to the first adapter rod, and the second adapter also includes two second adapter elastic supply auxiliary belts made of rubber bands, the two second adapter elastic supply auxiliary belts are correspondingly located on the outside of the two second adapter rods relative to the center of the pipeline, one end of the second adapter elastic supply auxiliary belt is fixedly connected to the frame of the last detection unit, and the other end of the second adapter elastic supply auxiliary belt is fixedly connected to the second adapter rod.

[0010] Furthermore, the present invention provides a pipeline ultrasonic guided wave detection system, wherein the frame of the detection unit is respectively provided with support ears corresponding to the basket bolt, the connecting elastic supply auxiliary belt, the first transfer rod, the second transfer rod, the first transfer elastic supply auxiliary belt and the second transfer elastic supply auxiliary belt, the two ends of the basket bolt are respectively provided with a first U-shaped fork, one end of the first transfer rod is provided with a second U-shaped fork, and one end of the second transfer rod is provided with a third U-shaped fork.

[0011] Furthermore, the present invention provides a pipeline ultrasonic guided wave detection system, wherein an anti-dropping nut is installed at the end of the guide rod, and the bottom insulating spacer, the annular permanent magnet, the upper insulating spacer and the disc-shaped electromagnetic coil are fixed by epoxy resin in the cast shell.

[0012] Furthermore, the pipeline ultrasonic guided wave detection system of the present invention also includes a multi-channel centralized controller connected to the transmitting coil and the receiving coil respectively through industrial interfaces.

[0013] Compared with the prior art, the pipeline ultrasonic guided wave detection system of the present invention has the following advantages: the present invention arranges a plurality of detection units distributed along the circumference of the pipeline, wherein, except for the tightening assembly hinged between the first and last detection units, the other adjacent detection units are hinged with connection assemblies, so that the detection unit is provided with a frame and a probe detachably fixed in the frame, two spaced supports are respectively arranged on both sides of the frame along the axial direction of the pipeline, a guide rod slidingly matched with the support is arranged in the support, the guide rod is installed on a roller supported on the pipeline through a wheel frame, and a first spring is arranged between the wheel frame and the support, so that the probe is provided with a shell and a bottom insulating spacer, an annular permanent magnet, an upper insulating spacer and a disc-shaped electromagnetic coil fixed in the shell in sequence, a rectangular hole is arranged on the bottom wall of the shell, and strip-shaped blocks are respectively arranged on both sides of the rectangular hole along the circumference of the pipeline, the bottom insulating spacer is connected to a coupling patch between the strip block and the pipeline through a flexible deformation body, and the disc-shaped electromagnetic coil is provided with a transmitting coil and a receiving coil and connected to two industrial interfaces extending out of the shell, wherein the flexible deformation body is made of silicone and the coupling patch is made of iron-cobalt alloy. Thus, a pipeline ultrasonic guided wave detection system with simple structure, convenient operation, high reliability, good adaptability and strong practicality is formed. In practical applications, for a single probe, the magnetic field generated by the annular permanent magnet will produce preliminary magnetization on the coupling patch. When the transmitting coil is energized, the magnetic field generated by the transmitting coil will produce enhanced magnetization on the coupling patch, and the transmitting coil will vibrate in the magnetic field of the annular permanent magnet due to the Lorentz force. The vibration will be transmitted to the pipeline through the upper insulating spacer, the annular permanent magnet, the bottom insulating spacer, the flexible deformable body and the coupling patch, and the ultrasonic guided wave will be excited in the pipeline. When the ultrasonic guided wave encounters a defect, a reflected echo will be generated. After the reflected echo is received by the coupling patch, it will be transmitted to the receiving coil through the flexible deformable body, the bottom insulating spacer, the annular permanent magnet and the upper insulating spacer, and the magnetic flux will change under the action of the inverse magnetostrictive effect. The change in magnetic flux will generate an induced electromotive force in the receiving coil. According to the induced electromotive force signal of the receiving coil, it can be judged whether the pipeline at the corresponding position of the probe has defects. Accordingly, multiple positions around the pipeline can be detected through multiple detection units.The invention improves the reliability of pipeline detection by arranging a plurality of detection units distributed along the circumference of the pipeline; by allowing the detection unit to set a frame and a probe detachably fixed in the frame, when a probe fails or is damaged, it only needs to be taken out of the frame and replaced with a new probe so that the detection system can continue to work, thereby improving the working efficiency and service life; by installing two retractable rollers on both sides of the frame, the convenience of adjusting the detection system along the circumference of the pipeline is improved, and after completing one detection, the entire detection system can be transferred to a new detection position along the circumference of the pipeline by loosening the tightening assembly and making the rollers of each detection unit lift the probe so that the coupling patch leaves the pipeline; by arranging a flexible deformable body between the bottom insulating spacer and the coupling patch, and arranging two strip-shaped stoppers matched with the coupling patch on the bottom wall of the shell, the coupling patch has the ability of extrusion deformation, which can be well fitted to the pipe wall on the one hand, thereby improving the detection reliability, and can be well adapted to different pipe diameters on the other hand, thereby improving the adaptability and application range.

[0014] A pipeline ultrasonic guided wave detection system of the present invention is described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of a pipeline ultrasonic guided wave detection system of the present invention;

[0016] Figure 2 Axonometric measurement of a pipeline ultrasonic guided wave detection system according to the present invention Figure 1 ;

[0017] Figure 3 Axonometric measurement of a pipeline ultrasonic guided wave detection system according to the present invention Figure 2 ;

[0018] Figure 4 for Figure 2 A partial enlarged view of position A in the middle;

[0019] Figure 5 for Figure 3 A partial enlarged view of position B in the middle;

[0020] Figure 6 It is a front view of the detection unit in the present invention;

[0021] Figure 7 A top view of the detection unit in the present invention;

[0022] Figure 8 for Figure 6 CC view in the figure;

[0023] Fig. 9 for Figure 6 DD view in the figure;

[0024] Fig.10 It is an axonometric diagram of the detection unit in the present invention;

[0025] Fig.11 is an axonometric view of the frame of the present invention;

[0026] Fig.12 It is an axonometric diagram of the probe in the present invention. DETAILED DESCRIPTION

[0027] First of all, it should be explained that the directional words such as up, down, left, right, front and back described in the present invention are only described according to the drawings for the convenience of understanding, and are not intended to limit the technical solution and the scope of protection of the present invention.

[0028] like Figures 1 to 12 The specific implementation of the pipeline ultrasonic guided wave detection system of the present invention shown in the figure comprises a plurality of detection units distributed along the circumference of the pipeline, wherein, except for the tightening assembly hinged between the first and last detection units, the connection assembly is hinged between the other adjacent detection units. The detection unit is provided with a frame 1 and a probe 2 detachably fixed in the frame 1, two spaced supports 11 are respectively provided on both sides of the frame 1 along the axial direction of the pipeline, a guide rod 12 is provided in the support 11 to be slidably matched with the support, the guide rod 12 is installed on the roller 14 supported on the pipeline 100 through the wheel frame 13, and a first spring 15 is provided between the wheel frame 13 and the support 11, so that the elastic force of the first spring 15 can be used to make the frame 1 have the ability to rise and fall relative to the pipeline. The probe 2 is provided with a shell 21 and a bottom insulating spacer 22, an annular permanent magnet 23, an upper insulating spacer 24 and a disc-shaped electromagnetic coil 25 fixed in the shell 21 in sequence, a rectangular hole is provided on the bottom wall of the shell 21, and strip blocks 26 are provided on both sides of the rectangular hole along the circumference of the pipeline respectively, the bottom insulating spacer 22 is connected to the coupling patch 28 between the strip block 26 and the pipeline through a flexible deformation body 27, and the disc-shaped electromagnetic coil 25 is provided with a transmitting coil and a receiving coil and connected to two industrial interfaces 29 extending out of the shell 21, wherein the flexible deformation body 27 is made of silicone and the coupling patch 28 is made of iron-cobalt alloy.

[0029] The above configuration constitutes a pipeline ultrasonic guided wave detection system with simple structure, convenient operation, high reliability, good adaptability and strong practicality. In practical applications, for a single probe 2, the magnetic field generated by the annular permanent magnet 23 will produce preliminary magnetization on the coupling patch 28. When the transmitting coil is energized, the magnetic field generated by the transmitting coil will produce enhanced magnetization on the coupling patch 28, and the transmitting coil will vibrate in the magnetic field of the annular permanent magnet 23 due to the Lorentz force. The vibration will be transmitted to the pipeline 100 through the upper insulating spacer 24, the annular permanent magnet 23, the bottom insulating spacer 22, the flexible deformable body 27 and the coupling patch 28, and excite ultrasonic guided waves in the pipeline 100. When the ultrasonic When the acoustic guided wave encounters a defect, a reflected echo will occur. After being received by the coupling patch 28, the reflected echo will be transmitted to the receiving coil through the flexible deformable body 27, the bottom insulating spacer 22, the annular permanent magnet 23 and the upper insulating spacer 24, and the magnetic flux will change under the action of the inverse magnetostrictive effect. The change in magnetic flux will cause the receiving coil to generate an induced electromotive force. According to the induced electromotive force signal of the receiving coil, it can be determined whether the pipeline at the corresponding position of the probe 2 has a defect. Accordingly, multiple positions around the pipeline can be detected through multiple detection units. The invention improves the reliability of pipeline detection by arranging a plurality of detection units distributed along the circumference of the pipeline; by allowing the detection unit to be provided with a frame 1 and a probe 2 detachably fixed in the frame 1, when a probe 2 fails or is damaged, it only needs to be taken out of the frame 1 and replaced with a new probe 2 so that the detection system can continue to work, thereby improving the working efficiency and service life; by installing two retractable rollers 14 on both sides of the frame 1, respectively, the convenience of adjusting the detection system along the circumference of the pipeline is improved, and after completing one detection, the entire detection system can be moved to a new detection position along the circumference of the pipeline by loosening the tightening assembly and making the rollers 14 of each detection unit lift the probe 2 so that the coupling patch 28 leaves the pipeline 100, and the new position detection can be performed after the tightening assembly is locked; by arranging a flexible deformable body between the bottom insulating spacer and the coupling patch, and arranging two strip-shaped blocks cooperating with the coupling patch on the bottom wall of the shell, the coupling patch has the ability of extrusion deformation, which can be well fitted to the pipe wall on the one hand, thereby improving the detection reliability, and can be well adapted to different pipe diameters on the other hand, thereby improving the adaptability and application range. It should be noted that the two industrial interfaces 29 are used to connect the positive and negative poles; to prevent the guide rod 12 from slipping, the present invention also installs an anti-slip nut 121 at the end of the guide rod 12, and fixes the bottom insulating spacer 22, the annular permanent magnet 23, the upper insulating spacer 24 and the disc-shaped electromagnetic coil 25 through the epoxy resin 210 poured in the shell 21 to ensure structural stability and insulation reliability; for ease of control, the present invention also provides a multi-channel centralized controller connected to the transmitting coil and the receiving coil respectively through the industrial interface 29 for actual precise control.It should also be pointed out that, in order to ensure the reliability of detection, the present invention also pre-coats a coupling agent layer on the pipeline before installing the detection system to ensure that the coupling patch 28 of the probe 2 is in close contact with the pipeline to achieve accurate transmission of the detection signal.

[0030] As an optimization solution, this specific implementation method makes the probe 2 and the frame 1 adopt the following detachable fixing method: guide grooves 16 are respectively set on the inner sides of the four side walls of the frame 1, so that the bottom of the guide groove 16 forms a limit platform 17, and a second spring 18 is installed in the limit platform 17 through a groove, and a locking plate 19 is respectively set on the top of the frame 1 at a position corresponding to the guide groove 16, wherein one end of the locking plate 19 is rotatably mounted on the frame 1 on one side of the guide groove 16 by a bolt 191, and a clamping head 192 is provided in the middle of the locking plate 19, and the locking plate 19 is locked. The other end of the plate 19 is provided with a hand screw 193, and the frame 1 is provided with a threaded hole 110 that matches the hand screw 193; the housing 21 is provided with a housing body 211 and a matching cover plate 212, and guide blocks 213 that match the guide groove 16 are respectively provided on the outer sides of the four side walls of the housing body 211, and the cover plate 212 is fixed to the housing body 211 through a fastening screw 214 corresponding to the guide block 213, and a limiting ring groove that matches the clamp 192 is provided on the fastening screw 214 at a position flush with the cover plate 212. This arrangement has the characteristics of simple structure, convenient disassembly and assembly, and stable connection. When installing the probe 2, first use the cooperation between the guide block 213 and the guide groove 16 to press the probe 2 into the frame 1, then insert the clamping head 192 of each locking plate 19 into the limiting ring groove of the corresponding fastening screw 214, and screw each hand screw 193 into the corresponding threaded hole 110; when disassembling the probe 2, first unscrew each hand screw 193 from the corresponding threaded hole 110, and turn each locking plate 19 to leave the corresponding fastening screw 214, the probe 2 will automatically pop out under the action of the second spring 18, and then the probe 2 can be taken out of the frame 1.

[0031] As an optimization scheme, the tightening assembly of this specific embodiment adopts the following structure: a first adapter 3 and a second adapter 4 are provided corresponding to the frame 1 of the head and tail detection unit, so that the first adapter 3 connects two bracket plates 5 distributed at intervals, a rotating shaft 51 is installed between the two bracket plates 5, a connecting hole 511 is provided on the rotating shaft 51, a crank 52 and a ratchet 53 are fixed at both ends of the rotating shaft 51, and a pawl 54 cooperating with the ratchet 53 is provided on the outer side of one bracket plate 5, wherein the middle part of the pawl 54 is hinged with the bracket plate 5, a lever is provided at the end of the pawl 54 away from the ratchet 53, a spiral spring is provided on the bracket plate 5 on one side of the pawl 54 through a supporting screw sleeve, one end of the spiral spring is inserted into the limiting hole on the bracket plate 5, and the other end of the spiral spring is pressed on the pawl 54; accordingly, a connecting belt 6 cooperating with the rotating shaft 51 is fixed on the second adapter 4. The tightening assembly of this arrangement has the characteristics of simple structure, convenient operation and stable connection. When connecting the tightening assembly, insert the connecting belt 6 into the connecting hole 511 of the rotating shaft 51, and rotate the rotating shaft 51 continuously by the crank 52 to wrap the connecting belt 6 around the rotating shaft 51, so as to achieve the purpose of connection tightening. In this process, the ratchet 54 will always stick to the ratchet 53 under the squeezing action of the spiral spring and prevent the rotating shaft 51 from rotating. When loosening the tightening assembly, the ratchet 54 is turned away from the ratchet 53 by the lever, and the connecting belt 6 will rotate with the rotating shaft 51 under the action of the first spring 15 of each detection unit. When the coupling patch 28 of each probe 2 leaves the pipeline, the lever is released, and the ratchet 54 is again attached to the ratchet 53 under the squeezing action of the spiral spring. At this time, the entire detection system can be turned to a new detection position along the pipeline circumference. After the new detection position is determined, the tightening assembly is tightened again by the crank 52 to continuously rotate the rotating shaft 51, and the new position detection can be performed after the coupling patch 28 is attached to the pipeline. As an optimization solution, this specific embodiment makes the connection component adopt the method of setting two basket bolts 7 and two connecting elastic supply-aiding belts 8, wherein the two basket bolts 7 are spaced apart along the axial direction of the pipeline, and the two ends of the basket bolts 7 are correspondingly hinged to the frame 1 of the adjacent detection unit, and the connecting elastic supply-aiding belt 8 is made of rubber bands and its two ends are correspondingly fixedly connected to the frame 1 of the adjacent detection unit, and the two connecting elastic supply-aiding belts 8 are correspondingly located at the outer side of the two basket bolts 7 relative to the center of the pipeline. The connection component of this setting has the characteristics of simple structure, convenient adjustment, strong adaptability and good stability. In practical applications, in order to improve the convenience of adjustment, the present invention also provides a ruler on the basket bolt 7 for easy observation.

[0032] As a specific embodiment, the present invention makes the first adapter 3 and the second adapter 4 adopt the following arrangement: the first adapter 3 includes two first adapter rods 31, which are spaced apart along the axial direction of the pipeline and hinged to the frame 1 of the first detection unit, and a first support shaft 32 is installed between the two first adapter rods 31, wherein two bracket plates 5 are respectively clamped on the first support shaft 32 inside the two first adapter rods 31 through shaft holes; the second adapter 4 includes two second adapter rods 41 corresponding to the first adapter rods 31, and the two second adapter rods 41 are respectively hinged to the frame 1 of the last detection unit, and a second support shaft 42 is installed between the two second adapter rods 41, wherein one end of the connecting belt 6 is fixed on the second support shaft 42. The first adapter 3 and the second adapter 4 arranged in this way have the characteristics of simple structure and stable connection. Furthermore, the present specific embodiment also provides the first adapter 3 with two first transfer elastic feed-in auxiliary belts 33 made of rubber bands, wherein the two first transfer elastic feed-in auxiliary belts 33 are correspondingly located on the outside of the two first transfer rods 31 relative to the center of the pipeline, one end of the first transfer elastic feed-in auxiliary belt 33 is fixedly connected to the frame 1 of the first detection unit, and the other end of the first transfer elastic feed-in auxiliary belt 33 is fixedly connected to the first transfer rod 31. This structure improves the stability and adaptability of the structure by providing the first transfer elastic feed-in auxiliary belt 33. Similarly, the present specific embodiment also provides the second adapter 4 with two second transfer elastic feed-in auxiliary belts 43 made of rubber bands, wherein the two second transfer elastic feed-in auxiliary belts 43 are correspondingly located on the outside of the two second transfer rods 41 relative to the center of the pipeline, one end of the second transfer elastic feed-in auxiliary belt 43 is fixedly connected to the frame 1 of the last detection unit, and the other end of the second transfer elastic feed-in auxiliary belt 43 is fixedly connected to the second transfer rod 41.

[0033] In practical applications, in order to facilitate the connection operation, the present invention respectively arranges support ears 111 corresponding to the basket bolt 7, the connecting elastic supply auxiliary belt 8, the first transfer rod 31, the second transfer rod 41, the first transfer elastic supply auxiliary belt 33 and the second transfer elastic supply auxiliary belt 43 on the frame 1 of the detection unit, and arranges a first U-shaped fork 61 at both ends of the basket bolt 7, a second U-shaped fork 311 at one end of the first transfer rod 31, and a third U-shaped fork 411 at one end of the second transfer rod 41.

[0034] The above embodiments are only descriptions of the preferred implementation modes of the present invention, and are not intended to limit the scope of protection of the present invention. Without departing from the design concept of the present invention, various modifications made by those skilled in the art based on the technical solution of the present invention should all fall within the scope of protection determined by the claims of the present invention.

Claims

1. A pipeline ultrasonic guided wave detection system, characterized in that: The invention comprises a plurality of detection units distributed along the circumference of a pipeline. Except for the tightening assembly hinged between the first and last detection units, the other adjacent detection units are hinged with connection assemblies. The detection units comprise a frame (1) and a probe (2) detachably fixed in the frame (1). The frame (1) is provided with two spaced supports (11) on both sides along the axial direction of the pipeline. The supports (11) are provided with guide rods (12) slidably matched therewith. The guide rods (12) are provided with rollers (14) supported on the pipeline via a wheel frame (13). A first spring (15) is provided between the wheel frame (13) and the support (11). The probe (2) comprises a shell (21) and a plurality of springs (15) which are fixed in sequence on the shell (21). A bottom insulating spacer (22), an annular permanent magnet (23), an upper insulating spacer (24) and a disc-shaped electromagnetic coil (25) are provided in a shell (21); a rectangular hole is provided on the bottom wall of the shell (21); strip-shaped blocks (26) are provided on both sides of the rectangular hole along the circumference of the pipeline; the bottom insulating spacer (22) is connected to a coupling patch (28) located between the strip-shaped block (26) and the pipeline through a flexible deformation body (27); the disc-shaped electromagnetic coil (25) includes a transmitting coil and a receiving coil and is connected to two industrial interfaces (29) extending out of the shell (21); the flexible deformation body (27) is made of silicone, and the coupling patch (28) is made of iron-cobalt alloy.

2. A pipeline ultrasonic guided wave detection system according to claim 1, characterized in that: The inner sides of the four side walls of the frame (1) are respectively provided with guide grooves (16), the bottom of the guide groove (16) is a limit platform (17), a second spring (18) is installed in the limit platform (17) through a groove, and a locking plate (19) is respectively provided on the top of the frame (1) at a position corresponding to the guide groove (16), one end of the locking plate (19) is rotatably installed on the frame (1) on one side of the guide groove (16) through a bolt (191), a clamping head (192) is provided in the middle of the locking plate (19), and a hand screw (193) is installed on the other end of the locking plate (19). ), a threaded hole (110) cooperating with a hand screw (193) is provided on the frame (1), the shell (21) comprises a shell body (211) and a cover plate (212), the outer sides of the four side walls of the shell body (211) are respectively provided with guide blocks (213) cooperating with the guide groove (16), the cover plate (212) is fixed to the shell body (211) by a fastening screw (214) corresponding to the guide block (213), and a limiting ring groove cooperating with the clamp (192) is provided at a position where the fastening screw (214) is flush with the cover plate (212).

3. A pipeline ultrasonic guided wave detection system according to claim 2, characterized in that: The tightening assembly comprises a first adapter (3) and a second adapter (4) which are hinged to the head and tail detection unit frames (1), the first adapter (3) being connected to two bracket plates (5) which are spaced apart, a rotating shaft (51) being installed between the two bracket plates (5), a connecting hole (511) being provided on the rotating shaft (51), a crank (52) and a ratchet (53) being fixed to the two ends of the rotating shaft (51) respectively, a pawl (54) which cooperates with the ratchet (53) being provided on the outer side of one bracket plate (5), the middle part of the pawl (54) being hinged to the bracket plate (5), a lever being provided at the end of the pawl (54) away from the ratchet (53), a spiral spring being provided on the bracket plate (5) on one side of the pawl (54) through a supporting screw sleeve, one end of the spiral spring being inserted into a limiting hole on the bracket plate (5), and the other end of the spiral spring being pressed on the ratchet (54), and a connecting belt (6) which cooperates with the rotating shaft (51) being fixed on the second adapter (4).

4. A pipeline ultrasonic guided wave detection system according to claim 3, characterized in that: The connection assembly comprises two basket bolts (7) and two connecting elastic supply-aiding belts (8), the two basket bolts (7) are spaced apart along the axial direction of the pipeline, the two ends of the basket bolts (7) are correspondingly hinged to the frames (1) of the adjacent detection units, the connecting elastic supply-aiding belt (8) is made of rubber bands and its two ends are correspondingly fixedly connected to the frames (1) of the adjacent detection units, and the two connecting elastic supply-aiding belts (8) are correspondingly located on the outside of the two basket bolts (7) relative to the center of the pipeline.

5. A pipeline ultrasonic guided wave detection system according to claim 4, characterized in that: The first adapter (3) comprises two first adapter rods (31), the two first adapter rods (31) are spaced apart along the axial direction of the pipeline and are hinged to the frame (1) of the first detection unit, a first support shaft (32) is installed between the two first adapter rods (31), the two bracket plates (5) are respectively clamped on the first support shafts (32) on the inner sides of the two first adapter rods (31) through the shaft holes, and the second adapter (4) comprises two second adapter rods (41) corresponding to the first adapter rods (31) one by one, the two second adapter rods (41) are respectively hinged to the frame (1) of the last detection unit, a second support shaft (42) is installed between the two second adapter rods (41), and one end of the connecting belt (6) is fixed on the second support shaft (42).

6. A pipeline ultrasonic guided wave detection system according to claim 5, characterized in that: The first adapter (3) further comprises two first transfer elastic supply auxiliary belts (33) made of rubber bands, the two first transfer elastic supply auxiliary belts (33) are correspondingly located on the outside of the two first transfer rods (31) relative to the center of the pipeline, one end of the first transfer elastic supply auxiliary belt (33) is fixedly connected to the frame (1) of the first detection unit, and the other end of the first transfer elastic supply auxiliary belt (33) is fixedly connected to the first transfer rod (31), and the second adapter (4) further comprises two second transfer elastic supply auxiliary belts (43) made of rubber bands, the two second transfer elastic supply auxiliary belts (43) are correspondingly located on the outside of the two second transfer rods (41) relative to the center of the pipeline, one end of the second transfer elastic supply auxiliary belt (43) is fixedly connected to the frame (1) of the last detection unit, and the other end of the second transfer elastic supply auxiliary belt (43) is fixedly connected to the second transfer rod (41).

7. A pipeline ultrasonic guided wave detection system according to claim 6, characterized in that: The frame (1) of the detection unit is provided with supporting ears (111) corresponding to the turnbuckle bolt (7), the connecting elastic delivery auxiliary belt (8), the first transfer rod (31), the second transfer rod (41), the first transfer elastic delivery auxiliary belt (33) and the second transfer elastic delivery auxiliary belt (43), respectively; the two ends of the turnbuckle bolt (7) are provided with a first U-shaped fork (61), one end of the first transfer rod (31) is provided with a second U-shaped fork (311), and one end of the second transfer rod (41) is provided with a third U-shaped fork (411).

8. A pipeline ultrasonic guided wave detection system according to claim 7, characterized in that: An anti-drop nut (121) is installed at the end of the guide rod (12), and the bottom insulating spacer (22), the annular permanent magnet (23), the upper insulating spacer (24) and the disc-shaped electromagnetic coil (25) are fixed by epoxy resin (210) in the cast shell (21).

9. A pipeline ultrasonic guided wave detection system according to claim 8, characterized in that: It also includes a multi-channel centralized controller which is respectively connected to the transmitting coil and the receiving coil via an industrial interface (29).

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