Large pipeline welding seam walking type detection device

Abstract

The utility model provides a large pipeline welding seam walking type detection device, which comprises a detection trolley, a traction belt and switch type permanent magnets, the two ends of the traction belt are respectively positioned and fixed by one switch type permanent magnet, and the two switch type permanent magnets are adsorbed on the outer wall of a pipeline so as to lay the traction belt along an annular welding seam of the pipeline; the traction belt penetrates through a traction belt tensioning mechanism above the detection trolley so as to tension and press the detection trolley on the outer wall of the pipeline; a detection probe is mounted at the bottom of the detection trolley and is used for performing flaw detection on a pipeline welding seam when the detection trolley moves along the traction belt; the device can be rapidly installed on the surface of a to-be-detected pipeline, and the welding seam of the large pressure pipeline can be rapidly detected.

Description

Technical Field

[0001] The utility model belongs to the technical field of pipeline detection, and in particular relates to a walking detection device for large-scale pipeline welds. Background Art

[0002] Medium and large pressure pipelines are widely used in the fields of petrochemical, public utilities and marine engineering. These pipelines need to be welded during the connection process, and most of the welding work is carried out on the construction site. Welding is a key step to ensure that the pipeline connection is firm and the seal is reliable. However, after welding, in order to ensure that the welding quality meets the requirements, the weld needs to be inspected. At present, welding quality inspection during the construction process often relies on manual handheld inspection instruments, and the operator holds the instrument to inspect the welding quality. However, during the handheld instrument process, due to the operator's own factors and environmental conditions, the instrument may have problems such as jitter and offset, resulting in high uncertainty in the test results, which may affect the accuracy and reliability of the test. Utility Model Content

[0003] Based on the above purpose, the utility model provides a walking detection device for large pipeline welds, which can be quickly installed on the surface of the pipeline to be detected, and quickly detects the welds of large pressure pipelines, avoiding problems such as jitter and offset of the instrument due to factors of the operator itself and limitations of environmental conditions, which is conducive to improving the reliability and accuracy of detection.

[0004] The technical solution adopted by the utility model is as follows: a walking inspection device for large-scale pipeline welds, including an inspection trolley, a traction belt and a switch-type permanent magnet, each end of the traction belt is positioned and fixed by a switch-type permanent magnet, and two switch-type permanent magnets are adsorbed on the outer wall of the pipeline to lay the traction belt along the annular weld of the pipeline; the traction belt passes through the traction belt tensioning mechanism above the inspection trolley to tension and press the inspection trolley on the outer wall of the pipeline; a detection probe is installed at the bottom of the inspection trolley, and the detection probe is used to detect the pipeline weld when the inspection trolley moves along the traction belt. The body of the inspection trolley is composed of a frame and four wheels driven by hub motors installed on the periphery of the frame.

[0005] The traction belt tensioning mechanism includes a tensioning base, a first guide wheel, a second guide wheel, a tensioning wheel and an elastic tensioning strip. The tensioning base is fixed on the detection trolley, and the first guide wheel and the second guide wheel are rotatably installed at the two ends of the tensioning base, and an elastic tensioning strip is arranged on each side of the tensioning base, and the two ends of each elastic tensioning strip are respectively hinged to the two ends of the same side of the tensioning base; the tensioning wheel is rotatably installed between the two elastic tensioning strips and is located between the first guide wheel and the second guide wheel.

[0006] A cam locking piece is pinned on the upper part of the switch type permanent magnet, and the part of the cam locking piece around the pin connection shaft is a cam structure. The gap between the pin connection part and the switch type permanent magnet can be adjusted by rotating the cam locking piece.

[0007] The traction belt is a flexible belt-shaped Kevlar fiber braid, which enters from the top of the first guide wheel, bypasses the bottom of the tension wheel, and then goes out from the upper part of the second guide wheel.

[0008] Preferably, the elastic tension strip is an M-shaped elastic steel strip.

[0009] Preferably, the detection probe includes an ultrasonic probe and a two-dimensional laser sensor. The ultrasonic probe is used to detect whether there are defects such as cracks or bubbles inside the weld, while the two-dimensional laser sensor is used to detect whether the outer contour of the weld meets the welding requirements.

[0010] The utility model has the following beneficial effects:

[0011] 1. It can be quickly and conveniently installed on the surface of the pipeline to be inspected, and can quickly detect the welds of large pressure pipelines, avoiding problems such as jitter and offset of the instrument due to factors of the operator itself and limitations of environmental conditions, which is conducive to improving the reliability and accuracy of detection.

[0012] 2. The main body adopts a lightweight traction belt to restrain the inspection trolley. The overall size is small and light, low cost and suitable for harsh construction environments.

[0013] 3. The utility model has strong adaptability by setting the installation position of the traction belt and adapting to the detection of linear welds, circular welds and spiral welds of large pressure vessels. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the working state of the pipeline weld walking detection device of the utility model;

[0015] Figure 2 This is a side view of the working state of the pipeline weld walking detection device of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the inspection trolley of the pipeline weld walking inspection device of the utility model;

[0017] Figure 4 This is a schematic diagram of the switch type permanent magnet structure of the pipeline weld walking detection device of the utility model;

[0018] In the figure: 1. pipeline, 2. detection trolley, 3. switch-type permanent magnet, 4. traction belt, 5. detection probe, 6. tensioning base, 7. first guide wheel, 8. second guide wheel, 9. tensioning wheel, 10. elastic tensioning strip, 11. switch, 12. cam locking piece. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0020] The terms used herein are only for describing specific embodiments and are not intended to limit the present invention. The terms "include", "comprises", etc. used herein indicate the existence of the features, steps, operations and / or components, but do not exclude the existence or addition of one or more other features, steps, operations or components.

[0021] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or can communicate with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Figure 1 This is a schematic diagram of the working state of the utility model pipeline weld walking detection device. Figure 2 It is a side view of the working state of the pipeline weld walking detection device of the utility model, a large pipeline weld walking detection device, as shown in the figure, includes a switch type permanent magnet 3, a traction belt 4 and a detection trolley 2, the two ends of the traction belt 4 are fixed on a switch type permanent magnet 3, the two switch type permanent magnets 3 are adsorbed on the surface of the pipeline 1 by magnetic force, and the traction belt 4 is pulled on the pipeline surface along the circumferential ring weld of the pipeline 1, and the traction belt 4 presses the detection trolley 2 on the outer surface of the pipeline 1, and the detection probe 5 is installed at the bottom of the detection trolley 2, and the detection probe 5 is aligned with the weld for flaw detection. When the driving wheel of the detection trolley 2 drives the trolley to move along the circumference of the pipeline 1, the traction belt 4 plays the role of a guide track, so that the detection trolley 2 moves along the traction belt 4, that is, moves along the ring weld on the pipeline 1, which is convenient for the flaw detection of the detection probe 5.

[0023] The switch type permanent magnet 3 is a strong magnet similar to a permanent magnetic lifter, which can be turned on and off by a manual switch. When the magnetic force is turned on, it can be adsorbed and fixed on the surface of the steel pressure pipe. Figure 4 , is a schematic diagram of the switch type permanent magnet structure of the pipeline weld walking detection device of the utility model. A switch 11 is arranged on the switch type permanent magnet 3. The knob switch 11 controls the opening and closing of the magnetic force, so as to fix or remove it on the pipeline 1; the top of the switch type permanent magnet 3 is designed with a cam type clamping mechanism for fixing the traction belt. In the illustrated embodiment, a cam locking member 12 is arranged. The cam locking member 12 is pinned to the upper part of the switch type permanent magnet 3, and the part thereof around the pinned axis is a cam structure. By manually rotating the cam locking member 12, the size of the gap between the pinned part and the switch type permanent magnet 3 can be adjusted. The traction belt 4 passes through the gap between the switch type permanent magnet 3 and the cam locking member 12. By manually rotating the cam locking member 12, the position of the traction belt 4 can be fixed or loosened.

[0024] The traction belt 4 shown is a flexible belt-shaped Kevlar fiber braid, which has the characteristics of friction resistance and high temperature resistance. The two ends are connected by a switch type permanent magnet and are tensioned and installed along the weld.

[0025] Figure 3 It is a schematic diagram of the structure of the inspection trolley of the pipeline weld walking inspection device of the utility model. The inspection probe 5 is placed under the body of the inspection trolley 2, and the traction belt tensioning mechanism is fixedly installed above the body of the inspection trolley 2. The traction belt tensioning mechanism includes a tensioning base 6, a first guide wheel 7, a second guide wheel 8, a tensioning wheel 9 and an elastic tensioning strip 10. The first guide wheel 7 and the second guide wheel 8 are respectively installed at the two ends of the tensioning base 6 through a pin shaft, and an elastic tensioning strip 10 is respectively arranged on both sides of the tensioning base 6. The tensioning wheel 9 is installed between the first guide wheel 7 and the second guide wheel 8 through two elastic tensioning strips 10. Specifically, the two ends of the elastic tensioning strip 10 are respectively hingedly installed on the sides of the two ends of the tensioning base, and the tensioning wheel 9 is hingedly installed in the middle position between the two elastic tensioning strips 10. The traction belt 4 enters from the top of the first guide wheel 7, then passes under the tensioning wheel 9, and finally winds out from the upper end of the second guide wheel 8. The two ends of the tension wheel 9 are supported by elastic tension strips 10, and the traction belt 4 is tensioned by the downward pressure provided by the elastic tension strips 10. The body of the inspection vehicle 2 is composed of a frame and four wheels driven by hub motors. It can crawl slowly along the pipe wall under the restraint of the traction belt.

[0026] The detection probe 5 is a sensor for detecting pipeline welds, mainly including an ultrasonic probe and a two-dimensional laser sensor. The ultrasonic probe is used to detect whether there are defects such as cracks or bubbles inside the weld, while the two-dimensional laser sensor is used to detect whether the outer contour of the weld meets the welding requirements.

[0027] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A walking detection device for large pipeline welds, characterized in that: It includes a detection trolley, a traction belt and a switch-type permanent magnet. The two ends of the traction belt are respectively positioned and fixed by a switch-type permanent magnet. The two switch-type permanent magnets are adsorbed on the outer wall of the pipeline to lay the traction belt along the annular weld of the pipeline. The traction belt passes through the traction belt tensioning mechanism above the detection trolley to tension and press the detection trolley against the outer wall of the pipeline; A detection probe is installed at the bottom of the detection trolley, and the detection probe is used to detect flaws on the pipeline weld when the detection trolley moves along the traction belt.

2. The large-scale pipeline weld walking detection device according to claim 1 is characterized in that: The traction belt tensioning mechanism includes a tensioning base, a first guide wheel, a second guide wheel, a tensioning wheel and an elastic tensioning strip. The tensioning base is fixed on the detection trolley, and the first guide wheel and the second guide wheel are rotatably installed at the two ends of the tensioning base, and an elastic tensioning strip is arranged on each side of the tensioning base, and the two ends of each elastic tensioning strip are respectively hinged to the two ends of the same side of the tensioning base; the tensioning wheel is rotatably installed between the two elastic tensioning strips and is located between the first guide wheel and the second guide wheel.

3. The large-scale pipeline weld walking detection device according to claim 1 is characterized in that: A cam locking piece is pinned on the upper part of the switch type permanent magnet, and the part of the cam locking piece around the pin connection shaft is a cam structure. The gap between the pin connection part and the switch type permanent magnet can be adjusted by rotating the cam locking piece.

4. The large-scale pipeline weld walking detection device according to claim 1, 2 or 3 is characterized in that: The traction belt is a flexible belt-shaped Kevlar fiber braid.

5. The large-scale pipeline weld walking detection device according to claim 1, 2 or 3, characterized in that: The body of the detection vehicle is composed of a frame and four wheels installed on the periphery of the frame and driven by wheel hub motors.

6. The large-scale pipeline weld walking detection device according to claim 2 is characterized in that: The traction belt enters from the top of the first guide wheel, passes around the bottom of the tension wheel, and then passes out from the upper part of the second guide wheel.

7. The large-scale pipeline weld walking detection device according to claim 2 or 6 is characterized in that: The elastic tension strip is an M-shaped elastic steel strip.

8. The large-scale pipeline weld walking detection device according to claim 1 is characterized in that: The detection probe includes an ultrasonic probe and a two-dimensional laser sensor.

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