Three-dimensional measuring device for corrosion defects of inner and outer walls of pipeline
By designing a three-dimensional measurement device for corrosion defects in the inner and outer walls of the pipeline including flexible chains, gears and measuring units, the problems of low measurement efficiency and poor accuracy in the prior art are solved, and high-precision and high-efficiency three-dimensional measurement is realized, which is suitable for pipes of different pipe diameters.
Patent Information
- Application Number
- CN202411976952.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-31
- Publication Date
- 2025-03-25
AI Technical Summary
In the prior art, the three-dimensional measurement method for corrosion defects in the inner and outer walls of the pipeline is low in efficiency, poor in accuracy, difficult to measure repetitively, complicated in operation, high labor intensity, and there are problems such as human error and difficulty in generating the overall outline of the defect at one time.
A three-dimensional measurement device for corrosion defects in the inner and outer walls of the pipeline is designed, including a first flexible chain, a second flexible chain, a gear, a locking device, a pipeline axial slide rail and a measurement unit. Through the combination of the flexible chain and gear, the measurement unit moves the measurement unit along the axial and circumferential direction of the pipeline, and combines the circumferential and axial scales to realize isometric measurement and three-dimensional data acquisition.
Three-dimensional measurement of corrosion defects in the inner and outer walls of pipes with different pipe diameters is realized, detection accuracy and efficiency are improved, labor intensity and artificial errors are reduced, and the overall depth distribution or wall thickness distribution of defects with large area is able to be measured at one time.
Smart Images
Figure CN119687760A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of oil and gas pipeline detection, and in particular to a three-dimensional measurement device for corrosion defects on inner and outer walls of a pipeline. Background Art
[0002] Oil and gas pipelines are the lifeline of national energy security, and the safety of oil and gas pipelines is currently the focus of attention. The inspection methods of oil and gas pipelines are mainly divided into external inspection and internal inspection. External inspection is to conduct indirect inspection of pipelines by methods such as detecting insulation layers and anti-corrosion layers, and cathodic protection systems, to find possible locations of defects in pipelines; internal inspection refers to the use of methods such as magnetic leakage or ultrasound, with the help of inspection robots running from the upstream end to the downstream end of the pipeline once, to achieve corrosion defect detection of the inner and outer walls of the entire pipeline. There is a certain error between the corrosion defects found by internal and external inspections and the actual size of the defects, and the defects need to be verified and measured.
[0003] Corrosion defects are mainly divided into defects on the inner wall and outer wall of the pipeline, and are mainly volumetric. At present, the means of measuring outer wall corrosion defects is a depth gauge, which can measure the depth of a single point of the defect; the means of measuring inner wall corrosion defects is an ultrasonic thickness gauge, which can measure the wall thickness of a single point of the defect; neither can measure the overall depth distribution or wall thickness distribution of defects with a large area at one time. In reference to the standard, the method of drawing a grid on the surface of the pipeline is mainly used to perform multi-point depth measurement or thickness measurement to obtain the overall situation of the defect. This method has the disadvantages of cumbersome operation, low efficiency, high labor intensity, large human error in drawing the grid, difficulty in repeated measurement, and inability to generate the overall outline of the defect at one time.
[0004] In order to solve the technical problems of low efficiency, poor accuracy and difficulty in repeatable measurement of the existing three-dimensional defect measurement methods, it is particularly necessary to develop a new three-dimensional measurement device for corrosion defects on the inner and outer walls of pipelines. Summary of the invention
[0005] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a three-dimensional measurement device for corrosion defects on the inner and outer walls of pipelines. The device has a reasonable structural design and is easy to operate. It can realize three-dimensional measurement of corrosion defects on the inner and outer walls of pipelines with different diameters, improve detection accuracy, and at the same time improve detection efficiency, reduce labor intensity, and is easy to promote and use.
[0006] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical scheme: a three-dimensional measuring device for corrosion defects on the inner and outer walls of a pipeline, comprising a first flexible chain and a second flexible chain fixed on the outer circumference of the pipeline, a first gear, a second gear, a first locking device, a second locking device, a pipeline axial slide rail and a measuring unit, the outer circumferences of the first flexible chain and the second flexible chain are respectively installed with a first gear and a second gear, the first gear and the second gear are respectively meshed with the first flexible chain and the second flexible chain, the first flexible chain and the second flexible chain are respectively installed with a first locking device and a second locking device for locking the chain, a pipeline axial slide rail is installed between the first gear and the second gear, and a measuring unit moving along the slide rail in the axial direction of the pipeline is installed on the pipeline axial slide rail.
[0007] Preferably, both sides of the first flexible chain and the second flexible chain are provided with circumferential scales of measuring length, and the surface of the pipeline axial slide rail is engraved with axial scales of measuring length. Through the circumferential scale and the axial scale, it is convenient to record the circumferential and axial moving steps of the measuring unit and keep the steps consistent, thereby realizing equidistant measurement.
[0008] Preferably, the first locking device and the second locking device are respectively installed on the sides of the first flexible chain and the second flexible chain. The first locking device and the second locking device have the same structure and are both composed of a chain tension adjustment lock; the chain tension adjustment lock includes a tensioning wheel, a locking buckle, a locking block, a fixed key, a connecting rod and a locking plate. The tensioning wheel is connected to the chain transmission on each corresponding side, and the axle of the tensioning wheel is fixedly connected to the locking block through a connecting rod. Locking buckles are provided on both sides of the locking block. The locking buckles are installed on the locking plate through pluggable fixed keys. The locking buckle is provided with three adjustable locking positions, and the locking block is provided with a lock head matching the locking position.
[0009] Preferably, the inner surfaces of the first flexible chain and the second flexible chain are provided with anti-slip devices; the anti-slip devices are made of anti-slip silicone dots, which are evenly distributed on the inner surface of the chain, and protrude 1-2mm from the chain body; the anti-slip devices may also be made of anti-slip strip grooves, which are evenly arranged along the inner arms of the chain, and protrude 1-2mm from the chain body, and the surface of the anti-slip strip grooves is provided with irregular patterns.
[0010] Preferably, the measuring unit is a depth gauge for measuring depth or an ultrasonic thickness measuring unit for measuring pipe wall thickness.
[0011] Preferably, the measuring unit is slidably arranged on the axial slide rail of the pipeline through a sleeve, and a plurality of slide grooves for sliding of the measuring unit are distributed on the surface of the axial slide rail of the pipeline; the measuring unit is installed on the outer wall of the sleeve, and a ball is installed on the inner wall of the sleeve, and the ball is connected to the sleeve body through an inner spring, and the ball rolls in the slide groove of the axial slide rail of the pipeline.
[0012] A measuring method for a three-dimensional measuring device for corrosion defects on inner and outer walls of a pipeline, comprising the following steps: firstly, fixing a first flexible chain and a second flexible chain on the outer circumference of the pipeline, and adjusting the lengths of the first flexible chain and the second flexible chain according to changes in the diameter of the pipeline; after adjusting the first flexible chain and the second flexible chain to suitable sizes, adjusting a first locking device and a second locking device to ensure that the first flexible chain and the second flexible chain are in close contact with the pipeline wall; a first gear and a second gear respectively meshing with the first flexible chain and the second flexible chain rotate along the circumferential direction of the pipeline, and carry a measuring unit to move along the circumferential direction; the measuring unit moves in the axial direction of the pipeline along an axial slide rail of the pipeline fixed between the first gear and the second gear, thereby realizing that the measuring unit can move both along the axial direction of the pipeline and along the circumferential direction to achieve three-dimensional measurement.
[0013] The beneficial effects of the present invention are as follows: the present invention realizes three-dimensional measurement of corrosion defects on the inner and outer walls of pipelines with different diameters, is easy to operate, greatly improves detection accuracy, reduces errors, and at the same time improves detection efficiency, has high reliability, reduces labor intensity, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments;
[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;
[0016] Figure 2 for Figure 1 Left view of
[0017] Figure 3 It is a schematic diagram of the planar structure of the present invention;
[0018] Figure 4 It is a structural schematic diagram of the chain tension adjustment lock of the present invention;
[0019] Figure 5 It is a schematic diagram of the connection between the measuring unit of the present invention and the axial slide rail of the pipeline. DETAILED DESCRIPTION
[0020] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.
[0021] Reference Figure 1-5, this specific embodiment adopts the following technical scheme: a three-dimensional measuring device for corrosion defects on the inner and outer walls of a pipeline, comprising a first flexible chain 1 and a second flexible chain 2 fixed on the outer circumference of the pipeline, a first gear 3, a second gear 4, a first locking device 5, a second locking device 6, a pipeline axial slide rail 7 and a measuring unit 8, the first flexible chain 1 and the second flexible chain 2 are respectively installed with a first gear 3 and a second gear 4 on their outer circumferences, the first gear 3 and the second gear 4 are respectively meshed with the first flexible chain 1 and the second flexible chain 2, the first flexible chain 1 and the second flexible chain 2 are suitable for different pipeline diameters, the first flexible chain 1 and the second flexible chain 2 are respectively installed with a first locking device 5 and a second locking device 6 for locking the chain, the first locking device 5 and the second locking device 6 are respectively installed on the sides of the first flexible chain 1 and the second flexible chain 2, a pipeline axial slide rail 7 is installed between the first gear 3 and the second gear 4, and a measuring unit 8 moving along the slide rail in the axial direction of the pipeline is installed on the pipeline axial slide rail 7.
[0022] It is worth noting that both sides of the first flexible chain 1 and the second flexible chain 2 are provided with circumferential scales 22 for measuring length, and the surface of the pipeline axial slide rail 7 is engraved with axial scales 23 for measuring length. The circumferential scales 22 and the axial scales 23 are used to measure the axial and circumferential movement distances, which facilitates recording the circumferential and axial movement steps of the measuring unit 8 and keeping the steps consistent, thereby realizing equidistant measurement.
[0023] It is worth noting that the first locking device 5 and the second locking device 6 have the same structure and are both composed of a chain tension adjustment lock; the chain tension adjustment lock includes a tensioning wheel 9, a locking buckle 10, a locking block 11, a fixing key 12, a connecting rod 13 and a locking plate 14, the tensioning wheel 9 is connected to the chain transmission on each corresponding side, the axle of the tensioning wheel 9 is fixedly connected to the locking block 11 through the connecting rod 13, locking buckles 10 are arranged on both sides of the locking block 11, the locking buckles 10 are installed on the locking plate 14 through a pluggable fixing key 12, the locking buckle 10 is provided with a three-speed adjustable locking position 15, and the locking block 11 is provided with a lock head 16 matching the locking position 15.
[0024] The inner surfaces of the first flexible chain 1 and the second flexible chain 2 are provided with anti-skid devices 17; the anti-skid devices 17 are made of anti-skid silicone dots or anti-skid strip grooves, the anti-skid silicone dots are evenly distributed on the inner surface of the chain, and the anti-skid silicone dots protrude from the chain body by 1-2mm; the anti-skid strip grooves are evenly arranged along the inner arms of the chain, and the anti-skid strip grooves protrude from the chain body by 1-2mm, and the surfaces of the anti-skid strip grooves are provided with irregular patterns.
[0025] By cooperating with the first locking device 5, the second locking device 6 and the anti-slip device 17, the first flexible chain 1 and the second flexible chain 2 can be secured on the pipeline. During operation, the fixing key 12 is pulled out, the locking buckle 10 is moved outward, and the locking block 11 is pressed down at the same time. A suitable locking position 15 is selected, and the locking block 11 is locked in the locking position 15 of the locking buckle 10 through the locking head 16. The locking buckle 10 is retracted and the fixing key 12 is inserted to fix it. The locking structure is tensioned to ensure the normal operation of the equipment and a good transmission effect.
[0026] It is worth noting that the measuring unit 8 is slidably arranged on the pipeline axial slide rail 7 through the shaft sleeve 18, and the surface of the pipeline axial slide rail 7 is distributed with multiple slide grooves 21 for the measuring unit 8 to slide; the measuring unit 8 is installed on the outer wall of the shaft sleeve 18, and the inner wall of the shaft sleeve 18 is installed with a ball 19, and the ball 19 is connected to the shaft sleeve body through the inner spring 20. The ball 19 rolls in the slide groove 21 of the pipeline axial slide rail 7. By applying pressure, the ball 19 squeezes the spring 20 and moves into the shaft sleeve 18, and then the slide groove 21 where the ball 19 rolls can be switched to adjust the measuring position of the measuring unit 8. After adjustment, the ball 19 is elastically reset by the spring 20 to make it abut against the slide groove 21 to ensure the stability of movement.
[0027] In addition, the measuring unit 8 is a depth gauge for measuring depth or an ultrasonic thickness measuring unit for measuring pipe wall thickness.
[0028] This specific embodiment also provides a measurement method of a three-dimensional measurement device for corrosion defects on inner and outer walls of a pipeline, the steps of which are: (1) firstly fixing a first flexible chain 1 and a second flexible chain 2 on the outer circumference of the pipeline, and adjusting the length of the first flexible chain 1 and the second flexible chain 2 according to the change of the pipeline diameter;
[0029] (2) After adjusting the first flexible chain 1 and the second flexible chain 2 to a suitable size, the first locking device 5 and the second locking device 6 are adjusted to ensure that the first flexible chain 1 and the second flexible chain 2 are closely attached to the pipe wall;
[0030] (3) The first gear 3 and the second gear 4 respectively meshing with the first flexible chain 1 and the second flexible chain 2 rotate along the circumferential direction of the pipeline and carry the measuring unit 8 to move along the circumferential direction;
[0031] (4) The measuring unit 8 moves in the axial direction of the pipeline along the pipeline axial slide rail 7 fixed between the first gear 3 and the second gear 4, so that the measuring unit 8 can move both in the axial direction and in the circumferential direction of the pipeline. At the same time, the circumferential scales 22 on the sides of the two chains and the axial scales 23 on the pipeline axial slide rail 7 are used to record the moving steps of the measuring unit 8 in the circumferential and axial directions, thereby realizing three-dimensional measurement.
[0032] The measuring device structure adopted in this specific embodiment can realize defect contour reconstruction through three-dimensional measurement, realize three-dimensional measurement of corrosion defects on the inner and outer walls of pipelines with different diameters, and can measure the overall depth distribution or wall thickness distribution of defects with a large area at one time, thereby greatly improving the detection accuracy, while improving the detection efficiency and reducing labor intensity, and has broad market application prospects.
[0033] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.
Claims
1. A three-dimensional measurement device for corrosion defects on inner and outer walls of pipelines, characterized in that: The invention comprises a first flexible chain (1) and a second flexible chain (2) for fixing on the outer circumference of a pipeline, a first gear (3), a second gear (4), a first locking device (5), a second locking device (6), a pipeline axial slide rail (7) and a measuring unit (8); the first gear (3) and the second gear (4) are respectively installed on the outer circumference of the first flexible chain (1) and the second flexible chain (2); the first gear (3) and the second gear (4) are respectively meshed with the first flexible chain (1) and the second flexible chain (2); the first locking device (5) and the second locking device (6) for locking the chains are respectively installed on the first flexible chain (1) and the second flexible chain (2); A tightening device (6) is provided, a pipeline axial slide rail (7) is installed between the first gear (3) and the second gear (4), and a measuring unit (8) is installed on the pipeline axial slide rail (7) and moves along the slide rail in the axial direction of the pipeline; both sides of the first flexible chain (1) and the second flexible chain (2) are provided with circumferential scales (22) for measuring length, and the surface of the pipeline axial slide rail (7) is engraved with axial scales (23) for measuring length. The axial and circumferential movement distances are measured by the circumferential scale (22) and the axial scale (23), so as to facilitate recording the movement steps of the measuring unit (8) in the circumferential and axial directions and keep the steps consistent, thereby realizing equidistant measurement.
2. A three-dimensional measurement device for corrosion defects on inner and outer walls of pipelines according to claim 1, characterized in that: The first locking device (5) and the second locking device (6) are respectively installed on the sides of the first flexible chain (1) and the second flexible chain (2); the first locking device (5) and the second locking device (6) have the same structure and are both composed of a chain tension adjustment lock.
3. A three-dimensional measurement device for corrosion defects on inner and outer walls of pipelines according to claim 2, characterized in that: The chain tension adjustment lock comprises a tensioning wheel (9), a locking buckle (10), a locking block (11), a fixing key (12), a connecting rod (13) and a locking plate (14); the tensioning wheel (9) is connected to the chain transmission of each corresponding side; the axle of the tensioning wheel (9) is fixedly connected to the locking block (11) through the connecting rod (13); locking buckles (10) are arranged on both sides of the locking block (11); the locking buckles (10) are installed on the locking plate (14) through pluggable fixing keys (12); the locking buckles (10) are provided with three adjustable locking positions (15); and the locking block (11) is provided with a lock head (16) matching the locking position (15).
4. A three-dimensional measurement device for corrosion defects on inner and outer walls of pipelines according to claim 1, characterized in that: The inner surfaces of the first flexible chain (1) and the second flexible chain (2) are provided with anti-slip devices (17).
5. A three-dimensional measurement device for corrosion defects on inner and outer walls of a pipeline according to claim 4, characterized in that: The anti-skid device (17) adopts anti-skid silicone points, which are evenly distributed on the inner surface of the chain and protrude 1-2 mm from the chain body.
6. A three-dimensional measurement device for corrosion defects on inner and outer walls of pipelines according to claim 4, characterized in that: The anti-skid device (17) adopts anti-skid strip grooves, which are evenly arranged along the inner arm of the chain, and the anti-skid strip grooves protrude from the chain body by 1-2 mm, and the surface of the anti-skid strip grooves is provided with irregular patterns.
7. The three-dimensional measurement device for corrosion defects on inner and outer walls of pipelines according to claim 1 is characterized in that: The measuring unit (8) adopts a depth gauge for measuring depth.
8. The three-dimensional measurement device for corrosion defects on inner and outer walls of pipelines according to claim 1 is characterized in that: The measuring unit (8) is an ultrasonic thickness measuring unit for measuring the wall thickness of the pipeline.
9. The three-dimensional measurement device for corrosion defects on inner and outer walls of pipelines according to claim 1, characterized in that: The measuring unit (8) is slidably arranged on the pipeline axial slide rail (7) through a shaft sleeve (18), and the surface of the pipeline axial slide rail (7) is distributed with a plurality of slide grooves (21) for the measuring unit (8) to slide; the measuring unit (8) is installed on the outer wall of the shaft sleeve (18), and a ball (19) is installed on the inner wall of the shaft sleeve (18), and the ball (19) is connected to the shaft sleeve body through an inner spring (20), and the ball (19) rolls in the slide groove (21) of the pipeline axial slide rail (7).
10. A measuring method using the three-dimensional measuring device for inner and outer wall corrosion defects of a pipeline according to claim 1, characterized in that: The steps are: ① First, the first flexible chain (1) and the second flexible chain (2) are fixed on the outer circumference of the pipeline, and the lengths of the first flexible chain (1) and the second flexible chain (2) are adjusted according to the change in the diameter of the pipeline; ② After adjusting the first flexible chain (1) and the second flexible chain (2) to a suitable size, the first locking device (5) and the second locking device (6) are adjusted to ensure that the first flexible chain (1) and the second flexible chain (2) are in close contact with the pipe wall; ③ The first gear (3) and the second gear (4) respectively meshing with the first flexible chain (1) and the second flexible chain (2) rotate along the circumference of the pipeline and carry the measuring unit (8) to move along the circumferential direction; ④ The measuring unit (8) moves in the axial direction of the pipeline along the pipeline axial slide rail (7) fixed between the first gear (3) and the second gear (4), thereby enabling the measuring unit (8) to move both in the axial direction and in the circumferential direction of the pipeline. At the same time, the circumferential scales (22) on the sides of the two chains and the axial scales (23) on the pipeline axial slide rail (7) are used to record the moving steps of the measuring unit (8) in the circumferential and axial directions, thereby achieving three-dimensional measurement.