Gas pipeline geometric deformation internal detector with function of assisting in passing through small-curvature-radius elbow and use method of gas pipeline geometric deformation internal detector

Abstract

The invention discloses a gas pipeline geometric deformation internal detector with a function of assisting in passing through a small-curvature-radius elbow and a use method of the gas pipeline geometric deformation internal detector, and belongs to the technical field of intelligent internal detection of gas pipelines. Comprising an elastic guide module, a buffer protection module, a data storage module, a retraction anti-blocking module and a deformation detection module. The gas pipeline geometric deformation inner detector provided by the invention has a function of assisting in passing through a small-curvature radius elbow of a pipeline. The detector not only can provide auxiliary passing support at an elbow, but also can automatically retract to prevent blockage when encountering a deformed part of the pipeline, and can effectively adapt to geometric deformation detection work of the gas pipeline under extreme working conditions. Meanwhile, the performance of the detector is more excellent when the detector passes through an elbow and a deformation area, no damage is caused to a pipeline body, the detection efficiency is greatly improved, and the advantages are remarkable.

Description

Technical Field

[0001] The present invention relates to the technical field of in-line inspection of gas pipelines, and provides a geometric deformation in-line detector for gas pipelines with the function of assisting in passing through elbows with small radius of curvature. Background Art

[0002] With the rapid development of the urban gas industry, the scale of gas pipelines is constantly expanding. The safe operation of gas pipelines is of vital importance. Regularly using in-line detectors to inspect buried gas pipelines is an important means to ensure safety.

[0003] Existing in-line detectors, such as the publicly disclosed patent CN220523841U - a gas pipeline detector, detect gas pipelines externally by holding the detector. This external detection method has low detection accuracy, especially for minute deformations, which it cannot accurately identify. Therefore, a geometric deformation in-line detector for gas pipelines is undoubtedly a more effective means for detecting the health status of gas pipelines.

[0004] However, currently, in-line pipeline detectors are usually mostly used for oil pipelines, and most non-metallic buried gas pipeline in-line detectors on the market are improved from metal pipeline in-line detectors. Special non-metallic gas pipeline in-line detectors are extremely lacking, and they cannot handle the problem of numerous elbows with small radius of curvature in non-metallic buried gas pipelines. In-line detectors often encounter difficulties when passing through elbows with small radius of curvature, and are prone to jamming, resulting in the interruption of the detection task, which not only affects the detection efficiency, but also may damage the in-line detector, increasing the detection cost and safety risks.

[0005] In view of this, the present invention provides a non-metallic buried gas pipeline geometric deformation in-line detector with the function of assisting in passing through elbows with small radius of curvature. Summary of the Invention

[0006] The purpose of the present invention is to provide a geometric deformation in-line detector for gas pipelines with the function of assisting in passing through elbows with small radius of curvature, so as to solve the problems of easy jamming, low detection efficiency and easy damage of the in-line detector when passing through elbows with small radius of curvature in gas pipelines, and ensure that the in-line detector can complete the detection task safely and efficiently.

[0007] To achieve the above purpose, the present invention is realized through the following technical solutions:

[0008] A gas pipeline geometric deformation internal detector with the function of assisting in passing through elbows with a small radius of curvature, comprising an elastic guiding module 1, a buffer protection module 2, a data storage module 3, an indentation anti-blocking module 4 and a deformation detection module 5; the elastic guiding module 1 is elastically connected to the front end of the buffer protection module 2, the buffer protection module 2 is fixedly connected to the front end of the data storage module 3, the data storage module 3 is sleeved outside the indentation anti-blocking module 4, and the deformation detection module 5 is fixed to the tail of the indentation anti-blocking module 4.

[0009] Furthermore, the elastic guiding module 1 includes a guiding plate 11 and a control spring 12; the guiding module 1 is a hemispherical shell, one end of the control spring 12 is fixedly connected to the inner surface of the guiding module 1, and the other end is fixedly connected to the buffer protection module 2. A plurality of control springs 12 are provided, and the quantity is set according to requirements. Each control spring 12 is arranged along the radial direction of the elastic guiding module 1.

[0010] Furthermore, the guiding plate 11 is made of ultra-high molecular weight polyethylene or polytetrafluoroethylene, which has good wear resistance, corrosion resistance and chemical stability, and can effectively extend the service life of the guiding plate.

[0011] Furthermore, the buffer protection module 2 includes a collision head 21 and a buffer pad 22; the collision head 21 is a hemisphere, and the bottom surface is fixed to the center of the buffer pad 22; the collision head 21 is located inside the guiding plate 11; the other end of the control spring 12 is connected to the front surface of the buffer pad 22. The rear surface of the buffer pad 22 is fixed to the head of the data storage module 3 through a flange.

[0012] Furthermore, the collision head 21 is made of explosion-proof polyurethane to prevent the internal detector body structure from being damaged when the speed is too fast or when passing through the elbow. The buffer pad 22 is made of natural rubber or nitrile rubber to play a role in buffer protection.

[0013] Further, the data storage module 3 includes a high-elastic double-lip cup 31, a guide rail 32, a compression spring 33, a cylinder body, a power supply battery, and a data acquisition card; the power supply battery is used to ensure the power supply and endurance of the whole machine. The data acquisition card is used to collect the gas pipeline deformation information detected by the deformation detection arm 51 through an angle sensor, and collect the operation mileage information of the in-pipe geometric deformation detector of the gas pipeline; the front end of the cylinder body is fixed to the buffer pad 22 by a flange, and the high-elastic double-lip cup 31 is fixedly sleeved on the head of the cylinder body, and is in interference fit with the pipe wall of the gas pipeline around it, and is used to form a driving pressure difference for the operation of the in-pipe geometric deformation detector of the gas pipeline, so as to realize the self-driving movement of the in-pipe geometric deformation detector of the gas pipeline; the compression spring 33 and the guide rail 32 are embedded in the cylinder body; the guide rail 32 is fixed on the inner side wall of the cylinder body and is in a portal shape, including a track composed of two parallel rods, one end of the track is a closed end, and the other end is an open end; one end of the compression spring 33 is fixed inside the closed end, and the other end of the compression spring 33 is fixed on the slider 41, and the slider 41 can slide along the track. The compression spring 33 realizes the retraction and restoration of the retraction anti-blocking module 4 by controlling the forward and backward movement of the slider 41.

[0014] Furthermore, the high-elastic double-lip cup 31 is made of nitrile rubber material, has good oil resistance, wear resistance, anti-aging performance, as well as high elasticity and strength, and at the same time, the double-lip structure provides better sealing performance.

[0015] Furthermore, for the said guide rail 32, under normal working conditions, the high-elastic double-lip cup 31 is in interference fit with the pipe wall, and the self-driving movement of the in-pipe geometric deformation detector of the gas pipeline is realized through the driving pressure difference (the pressure difference before and after the high-elastic double-lip cup 31) formed by the sealing between the high-elastic double-lip cup 31 and the pipe wall; when the in-pipe geometric deformation detector of the gas pipeline gets stuck at the deformation point, at this time, the driving pressure difference received by the in-pipe geometric deformation detector of the gas pipeline will become larger, and the retraction anti-blocking module 4 will, under the action of the fluid pressure, squeeze the compression spring 33 and retract into the data storage module 3 along the guide rail 32, thereby reducing the overall length of the in-pipe geometric deformation detector of the gas pipeline, and avoiding the jamming problem to a certain extent. In addition, after passing through the deformation point, under the action of the compression spring 33, the retraction anti-blocking module 4 will return to the initial position.

[0016] Further, the retraction anti-blocking module 4 includes a slider 41 and a core shaft 42; the slider 41 is circumferentially and uniformly fixed on the outer side surface of the front end of the core shaft 42, and the core shaft 42 is inside the cylinder body of the data storage module 3.

[0017] Further, the deformation detection module 5 includes a number of deformation detection arms 51, tension springs 52, a base 53, and a travel wheel 54. The travel wheel 54 rolls on the inner wall of the gas pipeline and is used to accurately measure the running mileage of the geometric deformation inner detector of the gas pipeline. The travel wheel 54 is hinged to one end of the deformation detection arm 51, the other end of the deformation detection arm 51 is hinged to the base 53, the base 53 is fixed on the outer side of the tail of the mandrel 42, and the middle part of the deformation detection arm 51 is connected to the base 53 through the tension spring 52.

[0018] Furthermore, since the mileage data of each travel wheel 54 will vary according to the amount of deformation and other factors under the same displacement condition, the deformation amount of the gas pipeline can be verified by comparing the mileage changes of each travel wheel 54 under the same displacement condition.

[0019] Furthermore, the deformation detection arm 51 forms a certain angle with the inner wall of the gas pipeline. When passing through the deformed part of the gas pipeline, the angle of the deformation detection arm 51 will change, and the deformation amount of the gas pipeline can be obtained by calculating the change in the angle of the deformation detection arm 51.

[0020] A method for using a geometric deformation inner detector of a gas pipeline with the function of assisting in passing through elbows with a small radius of curvature is as follows:

[0021] S1. Place the geometric deformation inner detector of the gas pipeline in the valve chamber through a portable launcher;

[0022] S2. Seal through the highly elastic double-lip cup 31 to form a driving pressure difference to drive the geometric deformation inner detector of the gas pipeline to move;

[0023] S3. The geometric deformation inner detector of the gas pipeline moves continuously along with the medium along the gas pipeline. Using the angle sensor at the center of the hinge axis between the deformation detection arm 51 and the base 53, record the change in the included angle between the deformation detection arm 51 and the axis of the gas pipeline, so as to obtain the distance between the deformation detection arm 51 and the gas pipe wall when it is pressed down or relaxed, and then calculate the deformation size. At the same time, through the travel wheel 54, measure the running mileage of the geometric deformation inner detector of the gas pipeline to realize the positioning of the running mileage of the geometric deformation inner detector of the gas pipeline;

[0024] S4. Recover the geometric deformation inner detector of the gas pipeline in the valve chamber through a portable receiver, and import the data in the data acquisition card into a computer for data analysis.

[0025] The technical solution provided by the present invention has the following beneficial effects compared with the known public technologies: In view of the characteristics of small diameter, small elbow curvature radius, and easy occurrence of large deformation of non-metallic gas pipelines, the present invention adopts the design of a geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with small curvature radii, aiming to avoid jamming accidents of the internal detector at elbows and deformation points during detection operations; at the same time, the elastic guiding module can help guide the internal detector to smoothly enter the elbow with a small curvature radius and avoid jamming caused by the internal detector directly colliding with the inner wall of the elbow; the buffer protection module can effectively buffer the impact force caused by the detector body colliding with the inner wall of the pipeline and avoid damage to the core components due to impact; the travel wheels hinged at the heads of the detection arms can accurately measure the running mileage of the internal detector. In addition, since the mileage data will vary according to the magnitude of the deformation amount and other factors under the same displacement condition of each travel wheel, the deformation amount of the gas pipeline can be verified by comparing the mileage changes of each travel wheel under the same displacement condition. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Schematic diagram of the overall structure of a geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with small curvature radii according to the present invention, state one;

[0028] Figure 2 Schematic diagram of the overall structure of a geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with small curvature radii according to the present invention, state one;

[0029] Figure 3 Schematic diagram of the elastic guiding module according to the present invention;

[0030] Figure 4 Schematic diagram of the buffer protection module according to the present invention;

[0031] Figure 5 Schematic diagram of the data storage module according to the present invention;

[0032] Figure 6 Schematic diagrams of two extreme states of the guide rail and the compression spring in the data storage module according to the present invention, where (a) is state I and (b) is state II;

[0033] Figure 7 Schematic diagram of the indentation anti-blocking module according to the present invention;

[0034] Figure 8 Schematic diagram of the deformation detection module described in the present invention. Among them, (a) is a sub - part of the deformation detection module, and (b) is the entire deformation detection module;

[0035] Among them, the above - mentioned drawings include the following reference numerals:

[0036] 1. Elastic guiding module; 11. Guide plate; 12. Control spring; 2. Buffer protection module; 21. Anti - collision head; 22. Buffer pad; 3. Data storage module; 31. High - elasticity double - lip leather cup; 32. Guide rail; 33. Compression spring; 4. Indentation anti - blockage module; 41. Slide block; 42. Mandrel; 5. Deformation detection module; 51. Deformation detection arm; 52. Tension spring; 53. Base; 54. Odometer wheel; Detailed implementation manners

[0037] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0038] The present invention provides a geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with small radius of curvature, as Figure 1 shown, including: an elastic guiding module 1, a buffer protection module 2, a data storage module 3, an indentation anti - blockage module 4, and a deformation detection module 5;

[0039] As Figure 3 shown, the elastic guiding module 1 includes a guide plate 11, and the guide plate 11 is embeddedly connected to the buffer pad 22 in the buffer protection module 2 with a control spring 12;

[0040] Furthermore, the guide plate 11 is made of ultra - high - molecular - weight polyethylene or polytetrafluoroethylene, and has good wear resistance, corrosion resistance, and chemical stability;

[0041] As Figure 4 shown, the buffer protection module 2 includes an anti - collision head 21 and a buffer pad 22, and the buffer pad 22 is connected to the data storage module 3 with a plurality of flanges;

[0042] Furthermore, the anti - collision head 21 is made of explosion - proof polyurethane, and the buffer pad 22 is made of natural rubber or nitrile rubber, both of which play a role in buffer protection;

[0043] As Figure 5As shown in the figure, the data storage module 3 includes a high-elastic double-lip cup 31, a guide rail 32, a compression spring 33, a power supply battery, and a data acquisition card. The guide rail 32 and the compression spring 33 are embedded and connected.

[0044] Further, the high-elastic double-lip cup 31 is made of nitrile rubber material, having good oil resistance, wear resistance, anti-aging performance, as well as high elasticity and strength. At the same time, the double-lip structure provides better sealing performance. Under normal working conditions, the high-elastic double-lip cup 31 is in interference fit with the pipe wall, and the self-driving movement of the internal detector is realized through the driving pressure difference formed by the seal.

[0045] When the internal detector gets stuck at the deformed part, the driving pressure difference received by the internal detector will become larger at this time. And the indentation anti-blocking module 4 will be pulled by the compression spring 33 along the guide rail 32 and retract into the data storage module 3 under the action of air pressure, thereby reducing the overall length of the internal detector and avoiding the blocking problem to a certain extent. In addition, after passing through the deformed part, under the action of the compression spring 33, the indentation anti-blocking module 4 will return to its initial position.

[0046] Further, a guide rail 32 is arranged inside the data storage module 3, a slider 41 is arranged outside the indentation anti-blocking module 4, and the data storage module 3 and the indentation anti-blocking module 4 are connected by a compression spring 33.

[0047] Further, the power supply battery is used to provide guarantee for the power supply and endurance of the whole machine, and the data acquisition card is used to collect the pipeline deformation information detected by the deformation detection arm and the operation mileage information of the internal detector.

[0048] As Figure 7 shown, the indentation anti-blocking module 4 includes a slider 41 and a core shaft 42, which are welded; the core shaft 42 is welded to the base 53 in the deformation detection module 5.

[0049] As Figure 8 shown, the deformation detection module 5 includes a deformation detection arm 51, a tension spring 52, a base 53, and a mileage wheel 54; the deformation detection arm 51 is hinged to the base 53, and one end of the tension spring 52 is connected to the base 53 and the other end is connected to the deformation detection arm 51.

[0050] Further, the deformation detection arm 51 forms a certain angle with the inner wall of the gas pipeline. When passing through the deformed part of the gas pipeline, the angle of the deformation detection arm will change, and the deformation amount of the gas pipeline is obtained by calculating the change in the angle of the deformation detection arm.

[0051] Further, the mileage wheel 54 rolls on the inner wall of the gas pipeline, and can accurately measure the operation mileage of the internal detector. In addition, since the mileage data will vary according to the size of the deformation amount and other factors under the same displacement condition of each mileage wheel, the deformation amount of the gas pipeline can be verified by comparing the mileage changes of each mileage wheel under the same displacement condition.

[0052] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A gas pipeline geometric deformation internal detector with the function of assisting in passing through elbows with a small radius of curvature, characterized in that, It includes an elastic guiding module (1), a buffer protection module (2), a data storage module (3), an indentation anti-blocking module (4) and a deformation detection module (5); the elastic guiding module (1) is elastically connected to the front end of the buffer protection module (2), the buffer protection module (2) is fixedly connected to the front end of the data storage module (3), the data storage module (3) is sleeved outside the indentation anti-blocking module (4), and the deformation detection module (5) is fixed to the tail of the indentation anti-blocking module (4); the indentation anti-blocking module (4) includes a slider (41) and a mandrel (42). The elastic guiding module (1) includes a guiding plate (11) and a control spring (12); the buffer protection module (2) includes an anti-collision head (21) and a buffer pad (22); the data storage module (3) includes a highly elastic double-lip leather cup (31), a guide rail (32), a compression spring (33), a cylinder body, a power supply battery and a data acquisition card; the deformation detection module (5) includes a number of deformation detection arms (51), a tension spring (52), a base (53) and a mileage wheel (54).

2. The geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with small radius of curvature according to claim 1, wherein The guiding module (1) is a hemispherical shell, one end of the control spring (12) is fixedly connected to the inner side surface of the guiding module (1), and the other end is fixedly connected to the buffer protection module (2); multiple control springs (12) are provided, and the quantity is set according to requirements. Each control spring (12) is arranged along the radial direction of the elastic guiding module (1).

3. A geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with small radius of curvature, as described in claim 2, characterized in that The guiding plate (11) is made of ultra-high molecular weight polyethylene or polytetrafluoroethylene, with good wear resistance, corrosion resistance and chemical stability, which can effectively extend the service life of the guiding plate.

4. A geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with a small radius of curvature, as described in claim 1, characterized in that, The anti-collision head (21) is a hemisphere, and the bottom surface is fixed to the center of the buffer pad (22); the anti-collision head (21) is located inside the guiding plate (11); the other end of the control spring (12) is connected to the forward surface of the buffer pad (22); the backward surface of the buffer pad (22) is fixed to the head of the data storage module (3) through a flange.

5. A gas pipeline geometric deformation internal detector with the function of assisting in passing through elbows with small curvature radii according to claim 4, characterized in that, The anti-collision head (21) is made of explosion-proof polyurethane to prevent the inner detector body structure from being damaged when the speed is too fast or when passing through an elbow; the buffer pad (22) is made of natural rubber or nitrile rubber to play a role in buffer protection.

6. The geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with small radius of curvature according to claim 1, characterized in that The power supply battery is used to ensure the power supply and endurance of the whole machine; the data acquisition card is used to collect the gas pipeline deformation information detected by the deformation detection arm (51) through the angle sensor, and collect the operation mileage information of the in-pipe geometric deformation detector of the gas pipeline; the front end of the cylinder body is fixed to the buffer pad (22) through a flange, and the high-elastic double-lip leather cup (31) is fixedly sleeved on the head of the cylinder body, and is in interference fit with the pipe wall of the gas pipeline around it, and is used to form a driving pressure difference for the operation of the in-pipe geometric deformation detector of the gas pipeline to realize the self-driving movement of the in-pipe geometric deformation detector of the gas pipeline; the compression spring (33) and the guide rail (32) are embedded in the cylinder body; the guide rail (32) is fixed on the inner side wall of the cylinder body and is in a door-shaped structure, including a track composed of two parallel rods, one end of the track is a closed end, and the other end is an open end; one end of the compression spring (33) is fixed inside the closed end, and the other end of the compression spring (33) is fixed on the slider (41), and the slider (41) can slide along the track, and the compression spring (33) realizes the retraction and restoration of the retractable anti-blocking module (4) by controlling the front and back movement of the slider (41).

7. A geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with small radius of curvature, as described in claim 6, wherein, The high-elastic double-lip leather cup (31) is made of nitrile rubber material, has good oil resistance, wear resistance and anti-aging performance, as well as high elasticity and strength, and at the same time, the double-lip structure provides better sealing performance.

8. A geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with a small radius of curvature, as described in claim 1, wherein, The outer side surface of the front end of the mandrel (42) is circumferentially and uniformly fixed with the slider (41), and the mandrel (42) is inside the cylinder body of the data storage module (3).

9. A geometric deformation internal detector for gas pipelines with the function of assisting in passing through elbows with small radius of curvature, as described in claim 1, characterized in that The mileage wheel (54) rolls on the inner wall of the gas pipeline and is used to accurately measure the operation mileage of the in-pipe geometric deformation detector of the gas pipeline; the mileage wheel (54) is hinged to one end of the deformation detection arm (51), and the other end of the deformation detection arm (51) is hinged to the base (53), and the base (53) is fixed on the outer side surface of the tail of the mandrel (42), and the middle part of the deformation detection arm (51) is connected to the base (53) through a tension spring (52).

10. A method for using a gas pipeline geometric deformation internal detector with the function of assisting in passing through elbows with a small radius of curvature according to any one of claims 1-9, characterized in that, The steps are as follows: S1. Put the in-pipe geometric deformation detector of the gas pipeline into the valve chamber through a portable launching cylinder; S2. Seal through the high-elastic double-lip leather cup (31) to form a driving pressure difference to drive the movement of the in-pipe geometric deformation detector of the gas pipeline; S3. The in-pipe geometric deformation detector of the gas pipeline continuously moves along with the medium along the gas pipeline. Using the angle sensor at the center of the rotating shaft where the deformation detection arm (51) is hinged to the base (53), record the change in the included angle between the deformation detection arm (51) and the axis of the gas pipeline, so as to obtain the distance between the deformation detection arm (51) and the gas pipe wall when it is pressed down or expanded, and then calculate the deformation size; at the same time, through the mileage wheel (54), measure the operation mileage of the in-pipe geometric deformation detector of the gas pipeline to realize the positioning of the movement mileage of the in-pipe geometric deformation detector of the gas pipeline; S4. Recover the in-pipe geometric deformation detector of the gas pipeline in the valve chamber through a portable receiving cylinder, and import the data in the data acquisition card into a computer for data analysis.

Images