A mobile pipeline flaw detector

Abstract

The invention relates to the technical field of pipeline flaw detection, and discloses a mobile pipeline flaw detector, comprising a shell, wherein a plurality of device bins are fixedly installed in the shell, a rotating shaft is arranged between two adjacent device bins, a sliding groove for limiting the rotating shaft is arranged on each device bin, a detection plate is fixedly installed on each rotating shaft, and a plurality of first springs are fixedly connected between each detection plate and the inner wall of the shell. The pipeline flaw detector uses a rubber strip on the detection plate to detect the roughness of the pipeline, and the rotating shaft moves along the sliding groove while rotating, and pulls the first wedge block through a connecting rod and a push rod, and then the limiting toothed disc drives the chain to move through the cooperation of the inclined surface of the first wedge block and the inclined surface of the second wedge block, and meshes with toothed discs of different diameters on the multi-stage toothed disc, so that the rotation speed of the rotating rod is adjusted, and the speed at which the limiting member drives the ultrasonic probe to reciprocate is accelerated, so as to increase the number of detection times of the position, and improve the accuracy of pipeline detection.

Description

Technical Field

[0001] The invention relates to the technical field of pipeline flaw detection, in particular to a mobile pipeline flaw detector. Background Art

[0002] Pipeline flaw detector is also called pipeline nondestructive testing instrument. It uses physical principles such as sound, light, heat, electricity, magnetism and radiation to detect various macro defects inside or on the surface of pipeline materials, objects or equipment without damaging the performance of the inspected objects, and judge their location, size, shape and type. Nondestructive flaw detection methods mainly include ultrasound, X-ray, gamma ray, magnetic powder and penetration. Its working principle mainly includes electromagnetic induction and ultrasonic detection technology. Electromagnetic induction flaw detector generates electromagnetic field by placing detection coils around or inside the pipeline. When there are defects or problems, the electromagnetic field will change. The status of the pipeline is judged by detecting this change. The ultrasonic flaw detector uses the propagation characteristics of ultrasonic waves in the material to detect defects inside the pipeline by sending and receiving ultrasonic signals.

[0003] During the use of pipelines, their surfaces may be corroded, oxidized or rubbed to varying degrees due to their manufacturing materials, manufacturing processes, usage conditions and environmental conditions, causing the pipeline surface to become rough. The greater the roughness of the pipeline surface, the greater the impact on the accuracy of ultrasonic flaw detection, because the rough parts will cause poor coupling between the probe and the contact surface, low reflected echo, or even no echo signal can be received. Therefore, it is necessary to increase the number of measurements at the rough positions to improve the accuracy of detection. The existing ultrasonic pipeline flaw detectors are usually manual handheld detection, which is not only inefficient, but also may leave some missed inspection areas during manual inspection, and may not be able to accurately perform comprehensive and accurate flaw detection on the pipeline. For this reason, we propose a mobile pipeline flaw detector. Summary of the invention

[0004] The object of the present invention is to provide a mobile pipeline flaw detector to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a mobile pipeline flaw detector, comprising a shell, a handle fixedly mounted on the shell, a plurality of device compartments fixedly mounted in the shell, a rotating shaft is arranged between two adjacent device compartments, a slide groove for limiting the rotating shaft is arranged on each device compartment, a detection plate is fixedly mounted on each rotating shaft, a plurality of first springs are fixedly connected between each detection plate and the inner wall of the shell, a plurality of rotating rods are rotatably mounted in the shell, the rotating rods correspond to the detection plates one by one, a limiting member is arranged on each rotating rod, and a reciprocating screw groove for limiting the limiting member is arranged, an ultrasonic probe is arranged on each limiting member, a plurality of slide rails for limiting the ultrasonic probe are fixedly mounted in the shell, and the slide rails correspond to the ultrasonic probe one by one;

[0006] A plurality of rollers are rotatably mounted in the shell, and the rollers correspond to the detection plates one by one, and each of the rollers is fixedly mounted with a limiting rod, one end of each limiting rod is located in the corresponding device bin, and a main toothed disc is slidably mounted thereon, and a multi-stage toothed disc is fixedly mounted on one end of each rotating rod, and each of the multi-stage toothed discs is composed of a plurality of toothed discs with different diameters arranged according to the diameter size, and each of the multi-stage toothed discs is transmission-connected to the corresponding main toothed disc through a chain. A limiting toothed disc is arranged on each of the chains, and a second wedge block is rotatably mounted on each of the limiting toothed discs, and each of the second wedge blocks is fixedly mounted on the corresponding inner wall of the device bin through a second spring, a connecting rod is fixedly mounted on one end of each of the rotating shafts, and a push rod is rotatably mounted on one end of each of the connecting rods, and a limiting block for limiting the push rod is fixedly mounted on the inner wall of each of the device bins, and a first wedge block matching the second wedge block is fixedly mounted on one end of each of the push rods.

[0007] Preferably, a liquid storage bin for storing coupling agent is fixedly installed between two adjacent device bins, a liquid outlet is provided on one side of each liquid storage bin, a scraper for squeezing the coupling agent out of the liquid outlet is slidably installed in each liquid storage bin, a screw is fixedly installed on each scraper, a limiting ring matching the screw is fixedly installed on the outer wall of each liquid storage bin, a first bevel gear is fixedly installed at one end of each rotating rod, a second bevel gear meshing with the first bevel gear is rotatably installed in each device bin, and each of the second bevel gears drives the limiting ring to rotate through a transmission mechanism.

[0008] Preferably, a roller for evenly applying the coupling agent is fixedly mounted on each of the limiting members via a telescopic column.

[0009] Preferably, a guide block is fixedly mounted on each of the second wedge-shaped blocks, a device plate is fixedly mounted in each of the device bins, and each of the device plates is provided with a guide groove for limiting the guide block.

[0010] Preferably, elastic blocks are fixedly installed on the upper and lower ends of each of the second wedge-shaped blocks, a fixing plate is fixedly installed on the inner wall of each of the device bins, each of the fixing plates is provided with a slot for limiting the elastic block, and a push block for pushing the second wedge-shaped block is fixedly installed on each of the push rods.

[0011] Preferably, a limiting strip for limiting the position of the ultrasonic probe is fixedly mounted on each of the slide rails, a limiting column is fixedly mounted on each of the limiting members, and a limiting groove for limiting the limiting column is provided on each of the ultrasonic probes.

[0012] Preferably, gears are fixedly mounted on both ends of each rotating shaft, and a rack meshing with the gears is fixedly mounted in each device compartment.

[0013] Preferably, an anti-slip strip for preventing the roller from shifting sideways is fixedly mounted on the outer ring of each roller.

[0014] Preferably, a rubber strip for increasing the friction between the detection plate and the pipeline surface is fixedly mounted on the end of each detection plate.

[0015] Preferably, a guide bar for limiting the position of the first wedge block is fixedly mounted on the inner wall of each device bin.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] The present invention utilizes the rubber strip on the detection plate to detect the roughness of the pipeline. The rotating shaft moves along the slide groove while rotating, and pulls the first wedge block through the connecting rod and the push rod. Then, through the cooperation of the inclined surface of the first wedge block and the inclined surface of the second wedge block, the limiting toothed disc drives the chain to move, and meshes with toothed discs of different diameters on the multi-stage toothed disc, so that the rotation speed of the rotating rod is adjusted, and the speed at which the ultrasonic probe is driven to reciprocate by the limiting component is accelerated, so as to increase the number of detection times of the position, thereby improving the efficiency and accuracy of pipeline detection.

[0018] The present invention utilizes a rotating rod to drive the first bevel gear and the second bevel gear to rotate, and drives a limiting ring to rotate through a transmission mechanism. The limiting ring limits the screw and the inner wall of the liquid storage bin limits the scraper, so that the screw pushes the scraper to move in the liquid storage bin, squeezes out the internal coupling agent from the liquid outlet, and spreads it evenly through the reciprocating motion of the roller. At the same time, the rotating rod speed is adjusted according to the surface roughness of the pipeline to control the extrusion dosage of the coupling agent, so as to prevent the coupling agent from being consumed excessively and causing friction between the probe and the pipeline when the ultrasonic probe is detected multiple times. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the detection board of the present invention;

[0021] Figure 3 It is a schematic diagram of the roller structure of the present invention;

[0022] Figure 4 This is a schematic diagram of the structure of the ultrasonic probe of the present invention;

[0023] Figure 5 It is a schematic diagram of the structure of the limiting rod and the limiting groove of the present invention;

[0024] Figure 6 This is a schematic diagram of the internal structure of the device bin of the present invention;

[0025] Figure 7 This is a schematic diagram of the guide groove structure of the present invention;

[0026] Figure 8 It is a schematic diagram of the structure of the fixing plate and the elastic block of the present invention;

[0027] Fig. 9 This is a schematic diagram of the structure of the second bevel gear of the present invention;

[0028] Fig.10 It is a schematic diagram of the internal structure of the liquid storage bin of the present invention.

[0029] In the figure: 1-housing; 2-handle; 3-detection plate; 4-rubber strip; 5-rotating shaft; 6-gear; 7-slideway; 8-rack; 9-device compartment; 10-first spring; 11-roller; 12-anti-slip strip; 13-main gear plate; 14-limiting rod; 15-ultrasonic probe; 16-slide rail; 17-limiting strip; 18-multi-stage gear plate; 19-chain; 20-rotating rod; 21-limiting member; 22-reciprocating screw groove; 23-telescopic column; 24-roller; 25-limiting column; 26-limiting slot; 27-connecting rod; 28-push rod; 29-limiting block; 30-first wedge block; 31-guide bar; 32-second wedge block; 33-limiting toothed disc; 34-second spring; 35-guide block; 36-installation plate; 37-guide slot; 38-elastic block; 39-fixing plate; 40-slot; 41-push block; 42-first bevel gear; 43-second bevel gear; 44-transmission mechanism; 45-screw; 46-liquid storage tank; 47-liquid outlet; 48-scraper; 49-limiting ring. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] See also Figure 1-Figure 10 The present invention provides a technical solution: a mobile pipeline flaw detector, comprising a shell 1, a handle 2 fixedly installed on the shell 1, which is convenient for pushing the device to move along the pipeline to detect flaws on the pipeline, a plurality of device bins 9 are fixedly installed in the shell 1, a rotating shaft 5 is arranged between two adjacent device bins 9, each device bin 9 is provided with a slide groove 7 for limiting the rotating shaft 5, a gear 6 is fixedly installed at both ends of each rotating shaft 5, a rack 8 meshing with the gear 6 is fixedly installed in each device bin 9, a detection plate 3 is fixedly installed on each rotating shaft 5, and a gear 6 is fixedly installed at the end of each detection plate 3 for increasing the detection The rubber strip 4 for friction between the detection plate 3 and the pipe surface, each detection plate 3 and the inner wall of the shell 1 are fixedly connected with a plurality of first springs 10. When the pipe has a rough part, after the rubber strip 4 contacts with the rough part of the pipe surface, due to the increase of friction, the detection plate 3 will rotate with the rotating shaft 5 as the axis, and the first spring 10 will be stretched. When the rotating shaft 5 rotates, through the engagement of the gear 6 and the rack 8, the rotating shaft 5 will move along the slide groove 7, and the rubber strip 4 will always contact with the pipe surface, so as to continuously detect whether the pipe surface is rough. The rougher the pipe surface is, the greater the friction force on the rubber strip 4 is, and the greater the rotation amplitude of the rotating shaft 5 is.

[0032] A plurality of rotating rods 20 are rotatably installed in the housing 1, and the rotating rods 20 correspond to the detection plates 3 one by one. A limiting member 21 is provided on each rotating rod 20, and a reciprocating screw groove 22 for limiting the limiting member 21 is provided. A plurality of rollers 11 are rotatably installed in the housing 1, and the rollers 11 correspond to the detection plates 3 one by one. An anti-skid strip 12 for preventing the roller 11 from shifting sideways is fixedly installed on the outer ring of each roller 11. As the device moves along the pipeline, the roller 11 will also continuously rotate, and the friction with the pipeline is increased through the anti-skid strip 12, so as to prevent the device from shifting and rotating during the movement, thereby affecting the detection. Accuracy, a limit rod 14 is fixedly installed on each roller 11, one end of each limit rod 14 is located in the corresponding device bin 9, and a main toothed disc 13 is slidably installed on it, and a multi-stage toothed disc 18 is fixedly installed on one end of each rotating rod 20, and each multi-stage toothed disc 18 is composed of a number of toothed discs with different diameters arranged according to the diameter size, and each multi-stage toothed disc 18 is connected to the corresponding main toothed disc 13 through a chain 19 for transmission. The chain 19 is located on the toothed disc with the largest diameter in the multi-stage toothed disc 18 in the initial stage. When the roller 11 rotates, it will drive its upper limit rod 14 and the main toothed disc 13 to rotate The main toothed disc 13 drives the multi-stage toothed disc 18 to rotate through the chain 19, and drives the rotating rod 20 to rotate. The reciprocating screw groove 22 limits the position of the limiter 21, so that the limiter 21 reciprocates along the rotating rod 20. Each limiter 21 is provided with an ultrasonic probe 15 (the ultrasonic probe 15 is a known structure, so the present invention will not be described in detail). A plurality of slide rails 16 for limiting the position of the ultrasonic probe 15 are fixedly installed in the housing 1. The slide rails 16 correspond to the ultrasonic probes 15 one by one. Each slide rail 16 is fixedly installed with a plurality of slide rails 16 for limiting the position of the ultrasonic probe 15. A limiting bar 17 is used for limiting, and a limiting column 25 is fixedly installed on each limiting member 21. A limiting groove 26 for limiting the limiting column 25 is provided on each ultrasonic probe 15. The limiting column 25 is limited by the limiting groove 26, and the ultrasonic probe 15 is limited by the slide rail 16 and the limiting bar 17. When the limiting column 25 reciprocates with the limiting member 21, the limiting column 25 will reciprocate in the limiting groove 26 and rotate appropriately, so that the ultrasonic probe 15 reciprocates along the slide rail 16. Through the cooperation of multiple ultrasonic probes 15, the pipeline can be fully inspected.

[0033] A limiting toothed disc 33 is provided on each chain 19, and a second wedge block 32 is rotatably mounted on each limiting toothed disc 33. Each second wedge block 32 is fixedly mounted on the inner wall of the corresponding device bin 9 through a second spring 34. A connecting rod 27 is fixedly mounted on one end of each rotating shaft 5, and a push rod 28 is rotatably mounted on one end of each connecting rod 27. A limiting block 29 for limiting the push rod 28 is fixedly mounted on the inner wall of each device bin 9, and a first wedge block 30 matching the second wedge block 32 is fixedly mounted on one end of each push rod 28. A guide bar 31 is installed for limiting the first wedge block 30, a guide block 35 is fixedly installed on each second wedge block 32, a device plate 36 is fixedly installed in each device bin 9, and a guide groove 37 for limiting the guide block 35 is provided on each device plate 36. When the rotating shaft 5 rotates and moves along the slide groove 7, it will drive one end of the connecting rod 27 to move, and the limit block 29 limits the push rod 28. The other end of the connecting rod 27 will drive the push rod 28 to move horizontally, and the push rod 28 will drive the first wedge block 30 to move along the guide bar 31. The cooperation between the inclined surface of the wedge block 30 and the inclined surface of the second wedge block 32, and the limiting of the guide block 35 on the second wedge block 32 by the guide groove 37 on the device plate 36, enable the second wedge block 32 to drive the limiting toothed disc 33 to move obliquely along the guide groove 37, and compress the second spring 34, so that the limiting toothed disc 33 pushes the chain 19 from the toothed disc with the largest diameter in the multi-stage toothed disc 18 to the toothed disc with a reduced diameter, so that the rotation speed of the rotating rod 20 is accelerated, and according to the different roughness of the pipeline, the rotation amplitude of the detection plate 3 is different, which drives the first wedge block 30 to move different distances, so that the second wedge block 32 is pushed The moving range of the limit toothed disc 33 is different. The rougher the pipe, the larger the moving distance of the limit toothed disc 33. The chain 19 is pushed to the smaller diameter toothed disc in the multi-stage toothed disc 18, so that the rotation speed of the rotating rod 20 is faster, which drives the reciprocating speed of the limiter 21 to accelerate, and the reciprocating speed of the ultrasonic probe 15 is also accelerated, so that the number of detections of the pipeline is increased to improve the detection accuracy. The upper and lower ends of each second wedge block 32 are fixedly installed with elastic blocks 38. Each second wedge block 32 is arranged in a T shape. The two elastic blocks 38 are located at the end of the second wedge block 32, and as shown in the attached Figure 8As shown, the inclined surface of the second wedge block 32 and the elastic block 38 are respectively located on both sides of the limiting toothed disc 33, and a fixing plate 39 is fixedly installed on the inner wall of each device bin 9, and each fixing plate 39 is provided with a card slot 40 for limiting the elastic block 38, and each push rod 28 is fixedly installed with a push block 41 for pushing the second wedge block 32. When the second wedge block 32 moves along the guide groove 37, the elastic block 38 thereon will be limited by the card slot 40 on the fixing plate 39, and will be limited by different card slots 40 according to the movement distance of the second wedge block 32. When the detection plate 3 passes through the rough part of the pipeline, the friction between the rubber strip 4 and the pipeline is reduced, and the elastic force of the first spring 10 will drive the detection plate 3 to The rotary shaft 5 is reset, and the connecting rod 27, the push rod 28 and the first wedge block 30 are driven to reset. The elastic block 38 on the second wedge block 32 is limited by the card slot 40, so that the second wedge block 32 cannot be reset by the second spring 34, and the rotating rod 20 maintains a faster rotation speed, so that the ultrasonic probe 15 can perform multiple inspections on the rough part of the pipeline. When the ultrasonic probe 15 passes through the rough part of the pipeline, the push rod 28 is about to complete the reset, and the inclined surface of the push block 41 on the push rod 28 will contact the second wedge block 32. With the reset of the push rod 28, the push block 41 gives the second wedge block 32 a thrust to help it reset, and the elastic block 38 is released from the limit of the card slot 40. The elastic force of the second spring 34 resets the second wedge block 32.

[0034] A liquid storage bin 46 for storing coupling agent is fixedly installed between two adjacent device bins 9, and a liquid outlet 47 is provided on one side of each liquid storage bin 46. A scraper 48 for squeezing the coupling agent out of the liquid outlet 47 is slidably installed in each liquid storage bin 46, and a screw 45 is fixedly installed on each scraper 48. A limiting ring 49 matching the screw 45 is fixedly installed on the outer wall of each liquid storage bin 46. A first bevel gear 42 is fixedly installed at one end of each rotating rod 20, and a second bevel gear 43 meshing with the first bevel gear 42 is rotatably installed in each device bin 9. Each second bevel gear 43 drives the limiting ring 49 to rotate through a transmission mechanism 44 (the transmission mechanism 44 is a known belt transmission structure, so the present invention will not be described in detail). When the rotating rod 20 rotates, it will drive the first bevel gear 42 to rotate, and through the meshing of the first bevel gear 42 and the second bevel gear 43, it will drive the second bevel gear 43 to rotate, and through the transmission mechanism 4 4, the limit ring 49 will be driven to rotate. Through the cooperation between the limit ring 49 and the screw 45, and the limit of the scraper 48 by the inner wall of the liquid storage bin 46, the screw 45 will push the scraper 48 to move inside the liquid storage bin 46 and extrude the coupling agent from the liquid outlet 47. When the device passes through the rough part of the pipeline, the rotation speed of the rotating rod 20 increases, which speeds up the rotation speed of the limit ring 49. The speed at which the screw 45 drives the scraper 48 to push is also accelerated, so that more coupling agent is squeezed out per unit time, so as to prevent the ultrasonic probe 15 from consuming too fast when performing multiple tests, causing the ultrasonic probe 15 to rub against the pipeline surface, thereby causing damage or affecting the accuracy of flaw detection. A roller 24 for evenly applying the coupling agent is fixedly installed on each limit member 21 through a telescopic column 23. When the limit member 21 reciprocates on the rotating rod 20, it also drives the roller 24 to reciprocate, and the roller 24 is always attached to the pipeline surface through the telescopic column 23, so that the coupling agent can be effectively evenly applied.

[0035] Specifically, after the device is installed on the pipeline as a whole, the handle 2 is manually pushed to drive the device as a whole to move along the pipeline. When the pipeline has a rough part, after the rubber strip 4 contacts the rough part of the pipeline surface, the friction coefficient between the rubber strip 4 and the pipeline surface increases, thereby increasing the friction force. Due to the increase in friction force, the detection plate 3 will rotate with the rotating shaft 5 as the axis, and the first spring 10 will be stretched. When the rotating shaft 5 rotates, the rotating shaft 5 will move along the slide groove 7 through the meshing of the gear 6 and the rack 8, and the rubber strip 4 will always contact the pipeline surface. The rougher the pipeline surface, the greater the friction force on the rubber strip 4, the less elastic sliding occurs (that is, the less displacement lost by the two friction surfaces slipping), the higher the transmission efficiency, and the greater the rotation amplitude of the rotating shaft 5. As the device moves along the pipeline, the roller 11 will also rotate continuously, and drive its upper limit rod 14 and the main toothed disc 13 to rotate. The main toothed disc 13 drives the multi-stage toothed disc 18 to rotate through the chain 19, and drives the rotating rod 20 to rotate. The reciprocating screw groove 22 limits the limit member 21, so that the limit member 21 reciprocates along the rotating rod 20. The limit slot 26 limits the limit column 25, and the slide rail 16 and the limit bar 17 limit the ultrasonic probe 15. When the limit column 25 reciprocates with the limit member 21, the ultrasonic probe 15 reciprocates along the slide rail 16. Through the cooperation of multiple ultrasonic probes 15, the pipeline can be fully inspected. When the rotating shaft 5 rotates and moves along the slide groove 7, the ultrasonic probe 15 reciprocates along the slide rail 16. One end of the movable connecting rod 27 moves, and the other end of the connecting rod 27 drives the push rod 28 to move horizontally through the limit block 29. The push rod 28 drives the first wedge block 30 to move along the guide bar 31. Through the cooperation between the inclined surface of the first wedge block 30 and the inclined surface of the second wedge block 32, and the limit of the guide block 35 on the second wedge block 32 by the guide groove 37 on the device plate 36, the second wedge block 32 drives the limiting toothed disc 33 to move obliquely along the guide groove 37, and the second spring 34 is compressed. The limiting toothed disc 33 pushes the chain 19 from the toothed disc with the largest diameter in the multi-stage toothed disc 18 to the toothed disc with a reduced diameter, so that the rotation speed of the rotating rod 20 is accelerated, and the reciprocating speed of the limiting member 21 is accelerated, so that the reciprocating motion of the ultrasonic probe 15 The speed is also accelerated. When the second wedge block 32 moves along the guide groove 37, the elastic block 38 on it will be limited by the groove 40 on the fixed plate 39. When the detection plate 3 passes through the rough part of the pipeline, the elastic force of the first spring 10 will drive the detection plate 3 and the rotating shaft 5 to reset, and drive the connecting rod 27, the push rod 28 and the first wedge block 30 to reset, while the elastic block 38 on the second wedge block 32 is limited by the groove 40, so that the second wedge block 32 cannot be reset by the second spring 34, and the rotating rod 20 maintains a faster rotation speed, so that the ultrasonic probe 15 can perform multiple tests on the rough part of the pipeline. When the ultrasonic probe 15 passes through the rough part of the pipeline, the push rod 28 is about to complete the reset, and the inclined surface of the push block 41 on the push rod 28 will contact the second wedge block 32, and with the reset of the push rod 28,The push block 41 gives a thrust to the second wedge block 32 to help it reset, and makes the elastic block 38 disengage from the limit of the slot 40. The elastic force of the second spring 34 resets the second wedge block 32. When the rotating rod 20 rotates, it will drive the first bevel gear 42 to rotate. Through the meshing of the first bevel gear 42 and the second bevel gear 43, the second bevel gear 43 will be driven to rotate, and through the transmission of the transmission mechanism 44, the limit ring 49 will be driven to rotate. The screw 45 will push the scraper 48 to move inside the liquid storage tank 46 and squeeze the coupling agent out of the liquid outlet 47. When the device passes through the rough part of the pipeline, the rotation speed of the rotating rod 20 increases, so that the rotation speed of the limit ring 49 is accelerated, and the speed of the scraper 48 driven by the screw 45 is also accelerated, so that more coupling agent is extruded per unit time. When the limiter 21 reciprocates on the rotating rod 20, it also drives the roller 24 to reciprocate, and through the telescopic column 23, the roller 24 is always attached to the surface of the pipeline, which can effectively apply the coupling agent evenly.

[0036] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mobile pipeline flaw detector, comprising a housing (1), a handle (2) fixedly mounted on the housing (1), characterized in that: A plurality of device compartments (9) are fixedly installed in the housing (1), a rotating shaft (5) is arranged between two adjacent device compartments (9), each of the device compartments (9) is provided with a slide groove (7) for limiting the rotating shaft (5), a detection plate (3) is fixedly installed on each of the rotating shafts (5), a plurality of first springs (10) are fixedly connected between each of the detection plates (3) and the inner wall of the housing (1), and a plurality of rotating rods (20) are rotatably installed in the housing (1). 0), the rotating rod (20) corresponds to the detection plate (3) one by one, each rotating rod (20) is provided with a limiting member (21), and is provided with a reciprocating screw groove (22) for limiting the limiting member (21), each limiting member (21) is provided with an ultrasonic probe (15), and a plurality of slide rails (16) for limiting the ultrasonic probe (15) are fixedly installed in the housing (1), and the slide rails (16) correspond to the ultrasonic probe (15) one by one; A plurality of rollers (11) are rotatably mounted in the housing (1), and the rollers (11) correspond to the detection plates (3) one by one. A limiting rod (14) is fixedly mounted on each of the rollers (11). One end of each limiting rod (14) is located in the corresponding device bin (9), and a main toothed disc (13) is slidably mounted thereon. A multi-stage toothed disc (18) is fixedly mounted on one end of each rotating rod (20), and each of the multi-stage toothed discs (18) is composed of a plurality of toothed discs with different diameters arranged according to the diameter size. Each of the multi-stage toothed discs (18) is transmission-connected to the corresponding main toothed disc (13) via a chain (19). Each of the chains (19) are provided with a limit toothed disc (33), each of the limit toothed discs (33) is rotatably mounted with a second wedge block (32), each of the second wedge blocks (32) is fixedly mounted on the inner wall of the corresponding device bin (9) through a second spring (34), one end of each of the rotating shafts (5) is fixedly mounted with a connecting rod (27), one end of each of the connecting rods (27) is rotatably mounted with a push rod (28), a limit block (29) for limiting the push rod (28) is fixedly mounted on the inner wall of each of the device bins (9), and one end of each of the push rods (28) is fixedly mounted with a first wedge block (30) matched with the second wedge block (32); A liquid storage bin (46) for storing coupling agent is fixedly installed between two adjacent device bins (9), a liquid outlet (47) is provided on one side of each liquid storage bin (46), a scraper (48) for squeezing the coupling agent out of the liquid outlet (47) is slidably installed in each liquid storage bin (46), a screw rod (45) is fixedly installed on each scraper (48), a limiting ring (49) matched with the screw rod (45) is fixedly installed on the outer wall of each liquid storage bin (46), a first bevel gear (42) is fixedly installed at one end of each rotating rod (20), a second bevel gear (43) meshing with the first bevel gear (42) is rotatably installed in each device bin (9), and each second bevel gear (43) drives the limiting ring (49) to rotate through a transmission mechanism (44); A roller (24) for evenly applying the coupling agent is fixedly mounted on each of the limiting members (21) via a telescopic column (23); A rubber strip (4) for increasing the friction between the detection plate (3) and the pipeline surface is fixedly mounted on the end of each detection plate (3).

2. A mobile pipeline flaw detector according to claim 1, characterized in that: A guide block (35) is fixedly mounted on each of the second wedge-shaped blocks (32), a device plate (36) is fixedly mounted in each of the device bins (9), and a guide groove (37) for limiting the position of the guide block (35) is provided on each of the device plates (36).

3. The mobile pipeline flaw detector according to claim 1 is characterized in that: Each of the second wedge-shaped blocks (32) is fixedly mounted with elastic blocks (38) at both upper and lower ends, each of the device bins (9) is fixedly mounted with a fixing plate (39) on the inner wall, each of the fixing plates (39) is provided with a slot (40) for limiting the elastic block (38), and each of the push rods (28) is fixedly mounted with a push block (41) for pushing the second wedge-shaped block (32).

4. The mobile pipeline flaw detector according to claim 1, characterized in that: A limiting strip (17) for limiting the position of the ultrasonic probe (15) is fixedly mounted on each of the slide rails (16), a limiting column (25) is fixedly mounted on each of the limiting members (21), and a limiting groove (26) for limiting the position of the limiting column (25) is provided on each of the ultrasonic probes (15).

5. The mobile pipeline flaw detector according to claim 1, characterized in that: Gears (6) are fixedly mounted on both ends of each rotating shaft (5), and a rack (8) meshing with the gears (6) is fixedly mounted in each device bin (9).

6. The mobile pipeline flaw detector according to claim 1, characterized in that: An anti-slip strip (12) is fixedly mounted on the outer ring of each roller (11) to prevent the roller (11) from shifting sideways.

7. The mobile pipeline flaw detector according to claim 1, characterized in that: A guide bar (31) for limiting the position of the first wedge block (30) is fixedly mounted on the inner wall of each device bin (9).

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