An ultrasonic non-destructive testing scanner for large diameter pipes

Abstract

The application relates to the technical field of ultrasonic nondestructive testing, in particular to an ultrasonic nondestructive testing scanning device for large-diameter pipelines, which comprises two connecting parts and a detection part, the detection part is connected between the two connecting parts, the connecting part comprises a guiding assembly and a moving assembly, one end of the guiding assembly is fixedly connected with the moving assembly, the other end of the guiding assembly is detachably connected with the detection part, the detection part comprises a detection support and walking wheels, the walking wheels and detection instruments are connected through the detection support, the walking wheels comprise left and right side plates arranged side by side, when the diameters of the pipelines on the two sides of the weld are different, the driving motor is operated, the wheel surface part of the walking wheel is pulled to rotate through the connecting nut seat, the wheel surface can always be attached to the outer walls of the pipelines on the two sides of the weld, the detection instrument can always face the position needing scanning detection, and the detection scanning accuracy is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ultrasonic nondestructive testing, in particular to an ultrasonic nondestructive testing scanning device for large-diameter pipes. BACKGROUND

[0002] Large-diameter pipes generally refer to metal pipes with an outer diameter greater than 200 mm, and are widely used in the fields of petroleum and chemical industry, pressure-bearing equipment, boiler manufacturing, power industry, nuclear power industry, etc. Such pipes are characterized by large flow rate, long conveying distance and wide construction layout range. Therefore, the application of such pipes is very wide, and once a problem occurs, it will have a high probability of causing pollution to the surrounding environment or even major accidents such as explosion, so it is necessary to ensure that the performance of such pipes meets the use and safety requirements. Moreover, because the layout location is remote and the layout range is wide, the efficiency and quality of the detection work are particularly important.

[0003] Pipe detection includes weld joint detection and pipe body detection, weld joint detection is further divided into pipe girth weld joint detection and longitudinal weld joint detection, and pipe body detection includes pipe corrosion detection and crack detection; the girth weld joint is a weld joint that wraps around a pipe in the circumferential direction of the pipe, which is a commonly used welding method for large-diameter pipes. Ultrasonic detection technology is a widely used nondestructive testing method, and the present application is suitable for ultrasonic nondestructive testing of pipe girth weld joints.

[0004] For such large-diameter pipe scanning frames, it is required to be fixed on the pipe and to move along the circumferential direction of the pipe. During the on-site detection process, after the first weld joint is detected, the scanning frame needs to be quickly disassembled and moved to the next weld joint for installation and detection. If the detection effect is not satisfactory, the inspector also needs to adjust the chain links and perform reciprocating detection. Therefore, whether the scanning frame can be easily disassembled and assembled and the quality of the detection greatly affect the work efficiency and reliability of the inspector.

[0005] The commonly used scanning method in the prior art is a chain-type scanning frame, which is processed into a shape similar to a chain and wound around the pipe with the first end connected to the last end. The probe holder, coding wheel and other components are fixed on the chain links, and the detection is realized by moving the chain links in the circumferential direction of the pipe. As the pipe diameter increases, the number of chain links used also increases, and the installation process of the chain links is prone to offset, which affects the travel trajectory of the probe and is inconvenient to use, thereby affecting the scanning efficiency of the pipe. Therefore, it is necessary to design a convenient support for large-diameter pipe scanning to improve the ultrasonic scanning efficiency.

[0006] As the application number CN2018116390871, a kind of for large-diameter pipeline's ultrasonic nondestructive testing chain type scanning frame, including scanning mechanism, first chain link, tail chain link and several ordinary chain links, first chain link, several ordinary chain links and tail chain link are mutually buckled and nested in pipeline to form chain ring, scanning mechanism is connected in the middle of ordinary chain link. Can be assembled and disassembled without using tools, avoid forgetting to take tools, tool is not suitable, tool is lost and various possible influence detection work to carry out adverse conditions, while greatly improve the work efficiency of on-site detection.

[0007] In the prior art similar to this application, the same diameter pipe weld can be detected, as shown in the accompanying drawings Figure 1 ; But when the diameter of the pipe on both sides of the weld is different, as shown in Figures 2-3 , scanning component is inclined with the outer wall of pipe, cause scanning angle of scanning component to be inclined, affect the accuracy of scanning weld structure etc.

[0008] The technical problem to be solved by the present application is to facilitate ultrasonic nondestructive testing of large-diameter pipeline, and the scanning device can be perpendicular to the weld to be detected, to improve the accuracy of scanning. SUMMARY

[0009] To solve the above problems, the present application provides a kind of for large-diameter pipeline's ultrasonic nondestructive testing scanning device.

[0010] The technical solution adopted by the present application to solve its technical problems is: a kind of for large-diameter pipeline's ultrasonic nondestructive testing scanning device, including two connecting parts and detection part, detection part is connected between two connecting parts, the connecting part includes guide assembly and moving assembly, one end of guide assembly is fixedly connected with moving assembly, the other end of guide assembly is detachably connected with detection part.

[0011] As optimization, the guide assembly includes guide steel rope and rope winding roller, one end of guide steel rope is provided with connecting wedge block, the other end of guide steel rope is fixedly connected with the rope winding roller, one end of the rope winding roller is connected with the rope winding motor, the outside of the rope winding roller is provided with the rope winding shell, the rope winding shell is fixedly connected with the moving assembly, the number of guide steel ropes is not less than 2.

[0012] As optimization, the moving assembly includes support base, telescopic cylinder and support platform, the telescopic cylinder is vertically connected between the support base and the support platform, the bottom surface of the support base is connected with a plurality of universal wheels, the rope winding shell is fixedly connected with the support platform, the bottom surface of the telescopic cylinder is provided with pressure sensor between the support base.

[0013] As optimization, the detection part comprises a detection support, a plurality of walking wheels and a detection instrument, the upper part of the detection support is provided with a connecting groove, the top of the connecting groove is an opening, the connecting wedge block is detachably connected with the connecting groove, the detection instrument is detachably connected with the detection support, and the walking wheels are rotationally connected with the lower part of the detection support.

[0014] As optimization, the walking wheel comprises a wheel surface part and two driving shaft parts, the driving shaft part comprises a driving motor and a driving screw rod, the driving motor is fixedly connected with the detection support, and the driving screw rod is fixedly connected with the output shaft of the driving motor.

[0015] The wheel surface part comprises a fixed frame, a plurality of arc-shaped plates rotationally connected to the two sides of the fixed frame and a plurality of supporting rods connected to the inner sides of the arc-shaped plates, the fixed frame is annular, the plurality of arc-shaped plates comprise a plurality of left side plates and a plurality of right side plates, the plurality of left side plates and the plurality of right side plates are arrayed along the circumferential direction of the fixed frame, the left side plates and the right side plates are symmetrically arranged, the supporting rods are rotationally connected to the inner sides of the arc-shaped plates, and the ends of the plurality of supporting rods away from the arc-shaped plates are connected with nut seats, and the nut seats are threadedly connected with the driving screw rod.

[0016] As optimization, the length direction of the arc-shaped plate is arranged along the axial direction of the driving screw rod, the width of the arc-shaped plate gradually decreases away from the fixed frame, the length of the supporting rod is greater than the length of the radius of the fixed frame, and the plurality of supporting rods are uniformly arrayed outside the nut seat.

[0017] The axial direction of the fixed frame is fixedly provided with a connecting seat, and the end of the driving screw rod is provided with a limiting end block, and the limiting end block is rotationally connected with the connecting seat.

[0018] The beneficial effects of the scheme are that the ultrasonic nondestructive detection scanning device for the large-diameter pipeline has the following beneficial effects:

[0019] The detection part is pulled through the connecting part to drive the detection part to move along the outside of the pipeline, so that the large-diameter pipeline can be efficiently scanned, and the use is convenient.

[0020] The detection part comprises a detection support and a walking wheel, the walking wheel and the detection instrument are connected through the detection support, the walking wheel comprises left side plates and right side plates arranged side by side, when the diameters of the two sides of the weld are different, the driving motor is operated, the wheel surface part of the walking wheel is pulled to rotate through the connecting nut seat, so that the wheel surface can always be attached to the outer wall of the pipeline on both sides of the weld, the detection instrument can always face the position to be scanned, and the accuracy of detection scanning is ensured.

[0021] The left side plate and the right side plate of the wheel surface part are driven by two driving motors respectively, so that the left side plate and the right side plate can be inclined at different angles, the inclined surface of the large-diameter pipe and the connection part of different pipe diameters can be efficiently detected, the use is convenient and fast, and the detection efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] BRIEF DESCRIPTION OF DRAWINGS Figure 1 It is a schematic view of a large-diameter pipe connection state of the present application.

[0023] BRIEF DESCRIPTION OF DRAWINGS Figure 2 It is a schematic view of a large-diameter pipe connection state of the present application.

[0024] BRIEF DESCRIPTION OF DRAWINGS Figure 3 It is a schematic view of a large-diameter pipe connection state of the present application.

[0025] BRIEF DESCRIPTION OF DRAWINGS Figure 4 It is a schematic view of a large-diameter pipe connection state of the present application.

[0026] BRIEF DESCRIPTION OF DRAWINGS Figure 5 It is a schematic view of a large-diameter pipe connection state of the present application.

[0027] BRIEF DESCRIPTION OF DRAWINGS Figure 6 It is a schematic view of a large-diameter pipe connection state of the present application.

[0028] BRIEF DESCRIPTION OF DRAWINGS Figure 7 It is a schematic view of a large-diameter pipe connection state of the present application.

[0029] BRIEF DESCRIPTION OF DRAWINGS Figure 8 It is a schematic view of a large-diameter pipe connection state of the present application.

[0030] BRIEF DESCRIPTION OF DRAWINGS Figure 9 It is a schematic view of a large-diameter pipe connection state of the present application. Figure 8 It is a schematic view of a large-diameter pipe connection state of the present application.

[0031] BRIEF DESCRIPTION OF DRAWINGS Figure 10 It is a schematic view of a large-diameter pipe connection state of the present application. Figure 4 It is a schematic view of a large-diameter pipe connection state of the present application.

[0032] Wherein, 1, guide steel rope, 2, connecting wedge, 3, rope winding motor, 4, rope winding shell, 5, supporting base, 6, telescopic cylinder, 7, supporting platform, 8, universal wheel, 9, pressure sensor, 10, detection support, 11, detection instrument, 12, driving motor, 13, driving screw, 14, fixing frame, 15, left side plate, 16, right side plate, 17, supporting rod, 18, nut seat, 19, connecting seat, 20, limiting end block. DETAILED DESCRIPTION

[0033] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the following will combine the drawings in the embodiments of the present application to make a clear and complete description of the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0034] It should be noted that similar reference numerals and letters indicate similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0035] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0036] As shown in Figure 4 , an ultrasonic non-destructive testing scanning device for large-diameter pipelines comprises two connecting parts and a testing part, the testing part being connected between the two connecting parts, the connecting part comprising a guide assembly and a moving assembly, one end of the guide assembly being fixedly connected with the moving assembly, and the other end of the guide assembly being detachably connected with the testing part.

[0037] As shown in Figure 4 , 10 , the guide assembly comprises a guide steel rope 1 and a rope winding roller, one end of the guide steel rope 1 being provided with a connecting wedge block 2, the other end of the guide steel rope 1 being fixedly connected with the rope winding roller, one end of the rope winding roller being connected with a rope winding motor 3, the outside of the rope winding roller being provided with a rope winding shell 4, the rope winding shell 4 being fixedly connected with the moving assembly, and the number of the guide steel ropes 1 being not less than 2.

[0038] As shown in Figure 4 , the guide assembly comprises a guide steel rope 1 and a rope winding roller, one end of the guide steel rope 1 being provided with a connecting wedge block 2, the other end of the guide steel rope 1 being fixedly connected with the rope winding roller, one end of the rope winding roller being connected with a rope winding motor 3, the outside of the rope winding roller being provided with a rope winding shell 4, the rope winding shell 4 being fixedly connected with the moving assembly, and the number of the guide steel ropes 1 being not less than 2.As shown, the mobile assembly comprises a support base 5, a telescopic cylinder 6 and a support platform 7, the telescopic cylinder 6 is vertically connected between the support base 5 and the support platform 7, the bottom surface of the support base 5 is connected with several universal wheels 8, the rope collecting shell 4 is fixedly connected with the support platform 7, and the bottom surface of the telescopic cylinder 6 is provided with a pressure sensor 9 between the support base 5.

[0039] As shown in Figure 5 , 10 , the detection part comprises a detection support 10, several walking wheels and a detection instrument 11, the upper part of the detection support 10 is provided with a connecting groove, the top of the connecting groove is an opening, the connecting wedge block 2 is detachably connected with the connecting groove, the detection instrument is detachably connected with the detection support 10, and the walking wheels are rotatably connected with the lower part of the detection support 10.

[0040] As shown in Figure 7 , the walking wheel comprises a wheel surface part and two driving shaft parts, the driving shaft part comprises a driving motor 12 and a driving screw rod 13, the driving motor 12 is fixedly connected with the detection support 10, and the driving screw rod 13 is fixedly connected with the output shaft of the driving motor 12.

[0041] As shown in Figure 9 , the wheel surface part comprises a fixed frame 14, several arc-shaped plates rotatably connected to the two sides of the fixed frame 14 and a support rod 17 connected to the inner side of the arc-shaped plate, the fixed frame 14 is annular, the several arc-shaped plates comprise several left side plates 15 and several right side plates 16, the several left side plates 15 and the several right side plates 16 are arrayed along the circumferential direction of the fixed frame 14, the left side plates 15 and the right side plates 16 are symmetrically arranged, the support rod 17 is rotatably connected to the inner side of the arc-shaped plate, and the end of the several support rods 17 away from the arc-shaped plate is connected with a nut seat 18, and the nut seat 18 is threadedly connected with the driving screw rod 13.

[0042] As shown in Figure 9 , the length direction of the arc-shaped plate is arranged along the axial direction of the driving screw rod 13, the width of the arc-shaped plate gradually decreases away from the fixed frame 14, the length of the support rod 17 is greater than the length of the radius of the fixed frame 14, and the several support rods 17 are uniformly arrayed outside the nut seat 18.

[0043] As shown in Figure 9 , the fixed frame 14 is fixedly provided with a connecting seat 19, and the end of the driving screw rod 13 is provided with a limiting end block 20, and the limiting end block 20 is rotatably connected with the connecting seat 19.

[0044] The scheme also includes a controller, the position of the controller is set by the worker during operation according to the actual situation, the controller is used to control the electrical devices used in the scheme, including but not limited to sensors, motors, telescopic rods, water pumps, electromagnetic valves, heating wires, heat pumps, display screens, computer input devices, switch buttons, communication devices, lamps, speakers and microphones; the controller is an Intel processor, an AMD processor, a PLC controller, an ARM processor or a single-chip microcomputer, and is used in conjunction with a mainboard, a memory bar, a storage medium and a power supply, the power supply is a mains electricity or a lithium battery; when the display screen is provided, a display card is also provided; for the operating principle of the controller, please refer to the books published by Tsinghua University Press, such as Automatic Control Principle, Microcontroller Principle and Application Simulation Case and Sensor Principle and Application, other books in the field can also be read for reference; other automation control and electrical devices not mentioned belong to the knowledge familiar to those skilled in the art, and will not be described here.

[0045] Method for use:

[0046] In specific use, the two connecting parts are arranged on the two sides of the pipeline respectively, the connecting wedge 2 at the end of the guide steel rope 1 is connected with the detection bracket 10, and the detection part is connected through the two connecting parts;

[0047] The controller controls the operation of the rope winding motor 3 to tighten the guide steel rope 1, so that the detection part is attached to the outside of the pipeline, the pressure sensor 9 detects the pressure received by the supporting base 5 at this time, and the controller sets the pressure reference threshold value to be equal to the above pressure;

[0048] One of the rope winding rollers winds the rope, and the other one unwinds the rope, so that the detection part moves along the outer wall of the pipeline, and the detection instrument 11 detects the outer wall of the pipeline;

[0049] If the pipeline shown in Figure 2 , 3 is encountered, the driving motor 12 is operated, the driving motor 12 drives the driving screw 13 to rotate, the driving screw 13 drives the nut seat 18 to move along the driving screw 13, when the nut seat 18 moves outward along the driving screw 13, the supporting rod 17 supports the arc-shaped plate upward, so that the outer end of the arc-shaped plate is inclined upward; when the nut seat 18 moves along the driving screw 13 in the direction of the connecting seat 19, the nut seat 18 pulls the pull rod to move inward, and the pull rod inclines the arc-shaped plate to the axis direction of the walking wheel;

[0050] According to the set pressure threshold value, the walking wheel and the guide steel rope 1 are adjusted, so that the pressure value detected by the pressure sensor 9 is equal to the set threshold value, the left plate 15 and the right plate 16 are respectively attached to the pipeline on both sides of the weld, and the detection instrument 11 can detect the weld efficiently;

[0051] According to the diameter of the pipeline to be detected, the height of the telescopic cylinder 6 is adjusted.

[0052] After the detection is completed, the connecting wedge block 2 is detached from the detection support 10, which is convenient and fast.

[0053] The above specific embodiments are only specific cases of the present application, and the patent protection scope of the present application includes but is not limited to the product forms and styles of the above specific embodiments. Any suitable changes or modifications made by any ordinary skilled person in the corresponding technical field to the present application meet the requirements of the claims of the present application and fall within the patent protection scope of the present application.

Claims

1. An ultrasonic non-destructive testing scanning device for large-diameter pipes, comprising two connecting parts and a testing part, wherein the testing part is connected between the two connecting parts, characterized in that: The connecting part includes a guide component and a moving component. One end of the guide component is fixedly connected to the moving component, and the other end of the guide component is detachably connected to the detection part. The guiding assembly includes a guide steel rope (1) and a take-up roller. One end of the guide steel rope (1) is provided with a connecting wedge (2), and the other end of the guide steel rope (1) is fixedly connected to the take-up roller. One end of the take-up roller is connected to a take-up motor (3), and the outside of the take-up roller is provided with a take-up shell (4). The take-up shell (4) is fixedly connected to the moving assembly. The number of guide steel ropes (1) is not less than 2. The moving component includes a support base (5), a telescopic cylinder (6), and a support platform (7). The telescopic cylinder (6) is vertically connected between the support base (5) and the support platform (7). The bottom surface of the support base (5) is connected to several casters (8). The rope winding shell (4) is fixedly connected to the support platform (7). A pressure sensor (9) is provided between the bottom surface of the telescopic cylinder (6) and the support base (5). The detection part includes a detection bracket (10), several wheels and a detection instrument (11). The upper part of the detection bracket (10) is provided with a connecting groove, the top of the connecting groove is open, the connecting wedge (2) is detachably connected to the connecting groove, the detection instrument is detachably connected to the detection bracket (10), and the wheels are rotatably connected to the lower part of the detection bracket (10). The walking wheel includes a wheel surface and two drive shafts. The drive shafts include a drive motor (12) and a drive screw (13). The drive motor (12) is fixedly connected to the detection bracket (10), and the drive screw (13) is fixedly connected to the output shaft of the drive motor (12). The wheel surface portion includes a fixed frame (14), several arc-shaped plates rotatably connected to both sides of the fixed frame (14), and support rods (17) connected to the inner side of the arc-shaped plates. The fixed frame (14) is annular. The several arc-shaped plates include several left side plates (15) and several right side plates (16). The several left side plates (15) and several right side plates (16) are arranged in an array along the circumferential direction of the fixed frame (14). The left side plates (15) and the right side plates (16) are symmetrically arranged. The support rods (17) are rotatably connected to the inner side of the arc-shaped plates. The end of the several support rods (17) away from the arc-shaped plates is connected to a nut seat (18). The nut seat (18) is threadedly connected to the drive screw (13). The length direction of the arc plate is set along the axis of the drive screw (13), the width of the arc plate gradually decreases away from the fixed frame (14), the length of the support rod (17) is greater than the radius of the fixed frame (14), and several support rods (17) are evenly arrayed on the outside of the nut seat (18). The fixing frame (14) has a connecting seat (19) fixed in the axial direction, and the end of the drive screw (13) is provided with a limiting end block (20), which is rotatably connected to the connecting seat (19).

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