Pipeline interior detection equipment

Abstract

The invention relates to the technical field of detection equipment, and provides pipeline interior detection equipment which comprises a moving device which is arranged in a pipeline and moves in the axial direction of the pipeline. The detection device is connected with the moving device through a traction rope and located at one end of the moving device; the rotating frame is rotationally arranged relative to the moving device and located at the other end of the moving device; the rotating frame, the moving device and the detecting device are sequentially arranged in the moving direction of the moving device. The multiple scraping pieces are evenly distributed in the circumferential direction of the axis of the rotating frame and abut against the inner wall of the pipeline, and after the rotating frame rotates, the scraping pieces are used for scraping off impurities on the inner wall of the pipeline; the number of the side baffles is multiple, the two side baffles are arranged on the two sides of the scraping piece correspondingly, and a containing space is formed among the two side baffles, the scraping piece and the rotating frame. By means of the technical scheme, the problem that in the prior art, when a magnetic flux leakage detection technology is used for detecting the interior of a pipeline, due to the fact that rust exists in the pipeline, detection of the interior of the pipeline is inaccurate is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of detection equipment, and in particular to a pipeline internal detection equipment. Background Art

[0002] In today's industrial production and infrastructure construction, pipeline transportation is an extremely critical link, and its safety is directly related to the continuity of production, the effective transportation of resources and the safety of the environment. Accurate detection inside the pipeline is crucial to ensure the safe operation of the pipeline. Among them, magnetic flux leakage detection technology is widely used in the detection of internal defects in pipelines due to its advantages such as high efficiency and convenience.

[0003] However, in actual application scenarios, rust easily forms on the inner wall of the pipe. There are many reasons for rust on the inner wall of the pipe. From the perspective of pipe material, if ordinary carbon steel and other easily oxidized materials are used, it is very easy to oxidize and rust when in contact with air and water. For example, ordinary carbon steel was mostly used in early urban water supply pipes. Over time, a large amount of rust accumulated inside.

[0004] In terms of the transport medium, when the transported medium contains water, the water will form a water film on the inner wall of the pipe, and oxygen will dissolve in it and react with the metal to oxidize. For example, in a natural gas pipeline, if the gas contains a certain amount of water vapor, it will promote the formation of rust. If the medium contains corrosive substances such as acid, alkali, and salt, such as chemical pipelines transporting acidic media such as sulfuric acid and hydrochloric acid, or sewage treatment plant pipelines transporting sewage containing salt, acid and alkali substances, it will accelerate the corrosion and rusting of the pipeline.

[0005] There are also environmental factors. When the humidity is high, even if the conveying medium does not contain water, the moisture in the air will condense into a water film on the inner wall of the pipe, causing rust to form, such as in wet underground pipes. Temperature changes will also affect the speed of rust formation. High temperature will accelerate chemical reactions and make the pipe more prone to rust. For example, in high-temperature hot water conveying pipes, rust will form relatively faster.

[0006] The presence of rust is extremely detrimental to magnetic flux leakage detection. On the one hand, the magnetic permeability of rust is much lower than that of the pipe material. When the magnetic flux leakage signal penetrates the rust layer, there will be serious signal attenuation. This makes the originally detectable tiny defect signal become extremely weak, or even completely submerged in the noise, making it impossible for the detection equipment to accurately identify these defects.

[0007] On the other hand, the uneven distribution of the rust layer will change the magnetic field distribution on the pipeline surface, generating a large number of interference signals. These interference signals are confused with the leakage magnetic signals generated by the real defects of the pipeline, making it difficult for inspectors to accurately distinguish the key information such as the location, size, and shape of the defects from the complex signals, greatly increasing the difficulty of data analysis and judgment.

[0008] In addition, rust will make the inner surface of the pipeline rough, destroying the good coupling conditions between the detection equipment sensor and the pipeline surface. The sensor cannot fit tightly to the inner wall of the pipeline, resulting in a significant decrease in detection sensitivity, further reducing the accuracy of the detection results. Summary of the invention

[0009] The present invention provides a pipeline internal detection device, which solves the problem in the related art that when using leakage magnetic detection technology to detect the inside of the pipeline, the detection of the inside of the pipeline is inaccurate due to the presence of rust inside the pipeline.

[0010] The technical solution of the present invention is as follows: A pipeline internal detection device, comprising: A moving device, the moving device is arranged inside the pipeline and moves axially along the pipeline; A detection device, the detection device is connected to the moving device via a traction rope and is located at one end of the moving device; A rotating frame, the rotating frame is rotatably arranged relative to the moving device and is located at the other end of the moving device; the rotating frame, the moving device and the detection device are arranged in sequence along the moving direction of the moving device; A scraper, wherein the scraper is in a plurality of numbers and the plurality of scrapers are evenly distributed circumferentially around the axis of the rotating frame and abut against the inner wall of the pipe. After the rotating frame rotates, the scraper is used to scrape off impurities on the inner wall of the pipe; Side baffles, the number of the side baffles is several, two of the side baffles are respectively arranged on both sides of the scraper, and a receiving space is formed between the two side baffles, the scraper and the rotating frame.

[0011] Optionally, the mobile device has a storage cavity inside, and further includes: A mounting frame, the mounting frame is arranged at one end of the moving device away from the detection device, the rotating frame is rotatably arranged on the mounting frame, the mounting frame has a slag inlet, and the slag inlet is connected to the storage chamber; After the rotating frame rotates, the plurality of accommodating spaces are connected with the slag inlet in sequence, so that the impurities in the plurality of accommodating spaces enter the receiving cavity in sequence.

[0012] Optionally, the slag inlet is located at the top of the mounting frame, and further comprises: A guide tube is arranged in the mounting frame, and two ends of the guide tube are respectively connected to the slag inlet and the receiving chamber, so as to guide the impurities to enter the receiving chamber from the slag inlet.

[0013] Optionally, the scraper comprises: A mounting seat, the mounting seat being arranged on the rotating frame; The scraper is rotatably arranged on the mounting seat, and the two side baffles are respectively arranged on both sides of the scraper. After the scraper rotates, the other end of the scraper approaches or moves away from the rotating frame.

[0014] Optionally, it also includes: a first connecting rod, one end of which is arranged on the side baffle at a side away from the moving device; A rotating disk is rotatably arranged on the side of the rotating frame away from the moving device. The rotating disk has a plurality of slide grooves. The other end of the first connecting rod is slidably arranged in the slide grooves. After the rotating disk rotates, the plurality of scrapers are driven to rotate synchronously.

[0015] Optionally, the rotating frame has a plurality of limiting holes, and further comprises: a first elastic member, wherein the first elastic member is disposed in the slide groove, and two ends of the first elastic member are respectively in contact with the inner wall of the slide groove and the first connecting rod, and are used to provide a force for the first connecting rod to slide in the slide groove, so that the scraper is away from the rotating frame; A fastener is arranged on the rotating disk, and after the fastener enters the limiting hole, it is used to limit the position of the rotating disk and the rotating frame.

[0016] Optionally, the mobile device comprises: A frame, wherein the storage cavity is located inside the frame; There are a plurality of mounting rods, the plurality of mounting rods are evenly distributed around the axis of the frame, and the axis of the mounting rod is parallel to the axis of the frame; Slide blocks, the slide blocks are used in pairs, the slide blocks used in pairs are arranged on the mounting rods for reverse sliding, and after the slide blocks used in pairs slide, the distance between the two slide blocks is expanded or reduced; A second connecting rod, the second connecting rod is used in pairs, and one end of two second connecting rods is respectively hingedly arranged on the two sliding blocks; The third connecting rod is used in pairs, one end of the third connecting rod is hinged on the mounting rod, and the other end is slidably arranged on the second connecting rod A traveling device, wherein the other ends of the second connecting rods used in pairs are hingedly arranged on the traveling device, and after the sliding blocks used in pairs slide, the traveling device approaches or moves away from the frame.

[0017] Optionally, it also includes: The second elastic member is sleeved on the mounting rod, and two ends of the second elastic member act on the frame and the slider respectively, so as to provide a force for the sliders used in pairs to approach each other, so as to keep the traveling device away from the frame.

[0018] Optionally, the traveling device comprises: A traveling carrier, wherein the second connecting rods used in pairs are hingedly arranged at one end away from the mounting rod on the traveling carrier; A crawler belt is cyclically movably arranged on the traveling carrier, the crawler belt has a plurality of belt teeth, the belt teeth have an arc-shaped cross-section, and the crawler belt abuts against the inner wall of the pipe through the belt teeth.

[0019] The working principle and beneficial effects of the present invention are: In the present invention, when using the device, the rotating frame, the scraper and the moving device are first placed in the pipeline, so that the moving device can abut against the inner wall of the pipeline, and can push the rotating frame and the scraper to move in the pipeline, and then the detection device is placed in the pipeline, and a traction rope is provided between the detection device and the moving device for connection. When the moving device moves in the pipeline, the rotating frame and the scraper will first scrape off the rust or impurities on the inner wall of the pipeline, and then the detection device will detect the inner wall of the pipeline after the rust is removed, which can greatly improve the detection accuracy of the leakage magnetic detection sensor. The accommodating space formed by the side baffle, the scraper and the rotating frame can quickly collect impurities while the scraper is scraping off the rust, so as to prevent the impurities from floating around in the pipeline at will, and effectively reduce the contamination of other parts of the detection equipment by impurities.

[0020] The highly sensitive magnetic flux leakage detection sensor is equipped with advanced signal processing circuits to accurately collect and effectively pre-process the magnetic flux leakage signal of the pipeline, providing a high-quality data basis for subsequent data analysis, which helps to accurately determine the internal defects of the pipeline. When the rotating frame drives the scraper to rotate, the scraper can efficiently scrape away impurities such as rust on the inner wall of the pipeline, creating a clean and low-interference environment for magnetic flux leakage detection, reducing the attenuation and interference of rust on the magnetic flux leakage signal, and improving the detection accuracy and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0022] Figure 1 It is a schematic diagram of the complete structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the mobile device of the present invention from a first angle; Figure 3 For the present invention Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the internal structure of the mobile device of the present invention from a second angle; Figure 5 For the present invention Figure 4 Enlarged view of point D in the middle; Figure 6 For the present invention Figure 1 Enlarged view of point B in the middle; Figure 7 It is a side view of the structure of the mobile device of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point C in the middle.

[0023] In the figure: 1. moving device, 2. detection device, 3. rotating frame, 4. scraper, 5. side baffle, 6. accommodating space, 101. storage chamber, 7. mounting frame, 701. slag inlet, 8. guide tube, 401. mounting seat, 402. scraper, 9. first connecting rod, 10. rotating disk, 1001. slide groove, 301. limiting hole, 11. first elastic member, 12. fastener, 102. frame, 103. mounting rod, 104. slider, 105. second connecting rod, 106. third connecting rod, 107. traveling device, 108. second elastic member, 1071. traveling carrier, 1072. crawler track, 1073. belt teeth. DETAILED DESCRIPTION

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0025] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0026] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" 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 or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0028] Reference Figure 1 to Figure 8 , which is the first embodiment of the present invention, proposes a pipeline internal detection device, including a moving device 1, which is arranged inside the pipeline and moves along the axial direction of the pipeline; a detection device 2 is connected to the moving device 1 through a traction rope and is located at one end of the moving device 1; a rotating frame 3 is rotatably arranged relative to the moving device 1 and is located at the other end of the moving device 1; the rotating frame 3, the moving device 1 and the detection device 2 are arranged in sequence along the moving direction of the moving device 1; a plurality of scrapers 4 are uniformly distributed around the axis of the rotating frame 3 in the circumferential direction and abut against the inner wall of the pipeline. After the rotating frame 3 rotates, the scrapers 4 are used to scrape off impurities on the inner wall of the pipeline; a plurality of side baffles 5 are arranged on both sides of the scraper 4, and a holding space 6 is formed between the two side baffles 5, the scraper 4 and the rotating frame 3.

[0029] In this embodiment, the mobile device 1 is designed as a crawler type to ensure stable walking in different pipelines, and the mobile device 1 is equipped with an intelligent control system inside, which can accurately control the direction and speed of travel according to the preset path and speed parameters. The detection device 2 uses a high-sensitivity magnetic leakage detection sensor with high resolution and wide dynamic range, which can accurately capture weak magnetic leakage signals. It is connected to the mobile device 1 through a high-strength flexible traction rope, which is waterproof, corrosion-resistant and has a certain tensile strength. The detection device 2 is externally a solid protective shell, and the internal integrated signal amplification, filtering and preliminary processing circuit can quickly pre-process the signal after collecting it, reduce interference, and improve signal quality. The rotating frame 3 is installed at one end of the mobile device 1 through a rotating shaft and a bearing seat to provide smooth and stable rotation, ensuring that the rotation is free of jamming or shaking. The scraper 4 is fixed to the rotating frame 3 by an adjustable bolt, and the contact angle with the inner wall of the pipeline can be fine-tuned according to actual conditions, which can effectively scrape off rust while minimizing damage to the inner wall of the pipeline.

[0030] Specifically, when in use, the rotating frame 3, the scraper 4 and the moving device 1 are first placed in the pipeline, so that the moving device 1 can abut against the inner wall of the pipeline, and can push the rotating frame 3 and the scraper 4 to move in the pipeline, and then the detection device 2 is placed in the pipeline. The detection device 2 and the moving device 1 are connected by a traction rope. When the moving device 1 moves in the pipeline, the rotating frame 3 and the scraper 4 will first scrape off the rust or impurities on the inner wall of the pipeline, and then the detection device 2 will detect the inner wall of the pipeline after the rust is removed, which can greatly improve the detection accuracy of the leakage magnetic detection sensor.

[0031] The advantage is that the highly sensitive magnetic flux leakage detection sensor, combined with the advanced signal processing circuit, can accurately collect and effectively pre-process the magnetic flux leakage signal of the pipeline, provide a high-quality data basis for subsequent data analysis, and help accurately determine the internal defects of the pipeline. When the rotating frame 3 drives the scraper 4 to rotate, the scraper 4 can efficiently scrape away impurities such as rust on the inner wall of the pipeline, creating a clean and low-interference environment for magnetic flux leakage detection, reducing the attenuation and interference of rust on the magnetic flux leakage signal, and improving the detection accuracy and reliability.

[0032] At the same time, the side baffle 5 is in an arc shape that matches the curvature of the inner wall of the pipe. During installation, the side baffle 5 is welded to both sides of the scraper 4 using an argon arc welding process to ensure that there is no gap between the side baffle 5 and the scraper 4 to prevent impurities from leaking from the gap. The accommodation space 6 is sufficient to accommodate a large amount of impurities such as rust generated during a scraping process. In addition, the edge of the side baffle 5 is also curled to avoid additional scratches on the inner wall of the pipe during use.

[0033] The advantage is that the accommodating space 6 formed by the side baffle 5, the scraper 4 and the rotating frame 3 can quickly collect impurities while the scraper 4 scrapes away the rust, preventing the impurities from floating around in the pipeline, effectively reducing the contamination of other parts of the detection equipment by impurities, and also preventing the impurities from adhering to the scraped clean inner wall of the pipeline again, thereby ensuring the continuous cleanliness of the detection environment.

[0034] Effectively collecting impurities avoids interference of impurities on the magnetic flux leakage detection signal. If impurities are randomly distributed in the pipeline, they may affect the distribution of the magnetic field, thereby interfering with the detection signal. The side baffle 5 cooperates with the scraper 4 to collect impurities in a centralized manner, which can ensure a stable detection environment and make the magnetic flux leakage signal collected by the detection device 2 more accurate.

[0035] Furthermore, the mobile device 1 has a storage chamber 101 inside, and also includes a mounting frame 7, which is arranged at one end of the mobile device 1 away from the detection device 2, and the rotating frame 3 is rotatably arranged on the mounting frame 7, and the mounting frame 7 has a slag inlet 701, which is connected to the storage chamber 101; after the rotating frame 3 rotates, a plurality of storage spaces 6 are connected to the slag inlet 701 in sequence, so that impurities in the plurality of storage spaces 6 enter the storage chamber 101 in sequence.

[0036] In this embodiment, the storage chamber 101 of the mobile device 1 is a cylindrical structure, and its volume is designed according to the common rust accumulation in the pipeline to meet the needs of multiple cleanings without frequent cleaning. The mounting frame 7 is fixed to the end of the mobile device 1 away from the detection device 2 by bolts to ensure a stable connection. The slag inlet 701 is located at the center of the top of the mounting frame 7, and its diameter is larger than the width of the containing space 6, which facilitates the smooth entry of impurities. The rotation of the rotating frame 3 is driven by a small servo motor installed inside the mounting frame 7 to achieve precise control. When the rotating frame 3 rotates, the containing space 6 is connected to the slag inlet 701 in turn, ensuring that impurities can enter the storage chamber 101 in sequence and stably.

[0037] The advantage is that the existence of the storage chamber 101 provides a centralized storage place for impurities, avoiding the accumulation of impurities in the pipeline or occupying other unnecessary space of the detection equipment. This not only ensures the cleanliness of the pipeline, but also enables the detection equipment to continue to work for a long time, without the need to frequently interrupt the detection process to clean up impurities, thereby improving the overall detection efficiency. After the rotating frame 3 rotates, the accommodating space 6 can automatically connect with the slag inlet 701 in turn without additional operation, realizing the automatic transfer of impurities such as rust from the scraping position to the storage chamber 101, greatly improving the consistency and efficiency of the detection work, and reducing the time waste and operational errors that may be caused by manual intervention.

[0038] Furthermore, the slag inlet 701 is located at the top of the mounting frame 7 and also includes a guide tube 8. The guide tube 8 is arranged in the mounting frame 7. Both ends of the guide tube 8 are respectively connected to the slag inlet 701 and the storage chamber 101, so as to guide impurities from the slag inlet 701 into the storage chamber 101.

[0039] In this embodiment, the guide tube 8 is made of a material with strong corrosion resistance, which can effectively resist the corrosive substances that may exist in the rust, ensuring that the guide tube 8 will not be damaged by corrosion during long-term use. One end of the guide tube 8 is the same size as the slag inlet 701, and one end is connected to the storage chamber 101, ensuring that there is no gap at the connection to prevent impurities from leaking, and can adapt to the slight displacement that may occur in the storage chamber 101 during movement. The guide tube 8 is tilted as a whole, and its length is actually designed according to the relative position of the mounting frame 7 and the storage chamber 101 to ensure that impurities can slide smoothly under the action of gravity.

[0040] The advantage is that the inclined design of the guide tube 8 and the close connection with the slag inlet 701 and the storage chamber 101 can accurately guide the impurities scraped off by the scraper 4 and entering the slag inlet 701 through the accommodating space 6 into the storage chamber 101, thereby avoiding the impurities from being scattered or accumulated in other parts during the transportation process, effectively ensuring the cleanliness of the inside of the pipeline and the detection equipment, and preventing interference with the detection process due to scattered impurities.

[0041] Furthermore, the scraper 4 includes a mounting seat 401, which is arranged on the rotating frame 3; the scraper 402 is rotatably arranged on the mounting seat 401, and the two side baffles 5 are respectively arranged on both sides of the scraper 402. After the scraper 402 rotates, the other end of the scraper 402 approaches or moves away from the rotating frame 3.

[0042] In this embodiment, the mounting seat 401 is firmly mounted on the rotating frame 3 by four fastening bolts to ensure that the mounting seat 401 will not loosen when the rotating frame 3 rotates at high speed. A special rotating sleeve is provided on the mounting seat 401, and the scraper 402 is connected to the sleeve by a rotating shaft to reduce the rotational friction so that the scraper 402 can rotate flexibly. The side of the scraper 402 in contact with the inner wall of the pipe can effectively scrape off the rust. The two side baffles 5 are respectively fixed on both sides of the scraper 402 by welding, and the side baffles 5 effectively prevent impurities from splashing out during the scraping process.

[0043] The advantage is that the scraper 402 can be rotatably set so that it can automatically adjust the contact angle according to the irregular shape and curvature of the inner wall of the pipeline, and can always maintain a close fit with the inner wall of the pipeline, whether in a straight pipe section or a curved pipe section, thereby greatly improving the scraping effect of impurities such as rust, ensuring that every corner of the inner wall of the pipeline can be effectively cleaned. The side baffle 5 is fixed on both sides of the scraper 402, and forms a closed accommodation space 6 with the scraper 402 and the rotating frame 3, effectively preventing the splashing of impurities during the scraping of rust, not only avoiding the secondary contamination of impurities to other parts of the pipeline, but also reducing the impact of impurities on other parts of the detection equipment, creating a cleaner environment for detection work.

[0044] Furthermore, it also includes a first connecting rod 9, one end of which is arranged on the side baffle 5 away from the moving device 1; the rotating disk 10 is rotatably arranged on the side of the rotating frame 3 away from the moving device 1, and the rotating disk 10 has a plurality of slide grooves 1001. The other end of the first connecting rod 9 is slidably arranged in the slide grooves 1001. After the rotating disk 10 rotates, it drives a plurality of scrapers 402 to rotate synchronously.

[0045] In this embodiment, one end of the first connecting rod 9 is mounted on the side baffle 5 away from the moving device 1. The rotating disk 10 is mounted on the side of the rotating frame 3 away from the moving device 1 through a central rotating shaft, and the rotating shaft is equipped with a bearing to ensure the smooth rotation of the rotating disk 10. A number of slide grooves 1001 corresponding to the number of scrapers 4 are evenly distributed on the rotating disk 10. The other end of the first connecting rod 9 is processed into a structure compatible with the slide groove 1001, and can slide flexibly in the slide groove 1001. Before the equipment enters the pipeline to carry out inspection work, the operator will use a special manual operating tool to rotate the rotating disk. By observing the angle scale mark installed on the equipment, the position of the scraper is accurately adjusted to adapt to the actual conditions of the inner wall of different pipelines.

[0046] The advantage is that when the rotating disk 10 rotates, the connection between the first connecting rod 9 and the scraper 4 can drive the plurality of scrapers 402 to rotate synchronously. This synchronous rotation mechanism enables the plurality of scrapers 4 to accurately contact different positions of the inner wall of the pipe at the same time, and perform rust scraping operations at different positions at the same time.

[0047] Furthermore, the rotating frame 3 has a plurality of limiting holes 301, and also includes a first elastic member 11. The first elastic member 11 is arranged in the slide groove 1001, and the two ends of the first elastic member 11 are respectively abutted against the inner wall of the slide groove 1001 and the first connecting rod 9, so as to provide a force for the first connecting rod 9 to slide in the slide groove 1001, so that the scraper 402 is away from the rotating frame 3; the fastener 12 is arranged on the rotating disk 10, and after the fastener 12 enters the limiting hole 301, it is used to limit the position of the rotating disk 10 and the rotating frame 3.

[0048] In this embodiment, the first elastic member 11 is a compression spring with a high elastic coefficient, the diameter of which is smaller than the width of the slide groove 1001 of the rotating disk 10, and the length is designed according to the depth of the slide groove 1001 and the elastic force required to be provided. During installation, the compression spring is placed at the bottom of the slide groove 1001, and one end is tightly abutted against the bottom surface of the slide groove 1001 to ensure that the spring will not be displaced during operation. The sliding end of the first connecting rod 9 is provided with a groove adapted to the spring, and the other end of the spring is embedded in the groove, thereby achieving reliable abutment with the first connecting rod 9. When the first connecting rod 9 slides in the slide groove 1001, the spring can always provide a stable elastic force to push the first connecting rod 9, thereby keeping the scraper 402 in close contact with the inner wall of the pipeline.

[0049] The fastener 12 is a rotatable threaded pin, and the limiting holes 301 of the rotating disk 10 are all threaded holes. The threaded pin is fixed to the rotating disk 10 by cooperating with the threaded hole. When the position of the rotating disk 10 and the rotating frame 3 needs to be fixed, the operator only needs to use a matching tool, such as a screwdriver, to screw the fastener 12 into the limiting hole 301, thereby limiting the rotation of the rotating disk 10 relative to the rotating frame 3. When the position of the rotating disk 10 needs to be adjusted, the threaded pin is screwed in the opposite direction to withdraw it from the limiting hole 301, and the rotation function of the rotating disk 10 can be restored.

[0050] The advantage is that the continuous elastic force provided by the first elastic member 11 can ensure that the scraper 402 always maintains contact with the inner wall of the pipe with appropriate pressure during the entire working process. Regardless of whether there is local unevenness on the inner wall of the pipe or thickness changes caused by rust accumulation, the scraper 402 can automatically adjust its position under the action of the spring elastic force, continuously and effectively scrape off the rust, ensure the stability and continuity of the scraping work, and improve the consistency of the scraping effect. The operator can adjust the position and angle of the scraper 402 by controlling the rotation of the rotating disk 10 according to the actual situation of the rust on the inner wall of the pipe. When adjustment is required, just loosen the fastener 12, rotate the rotating disk 10 to the appropriate position, and then tighten the fastener 12 to fix it. This flexible adjustment method enables the equipment to quickly adapt to the detection needs of different pipelines. Whether it is a pipeline with uniform rust distribution or a pipeline with local severe rust, the best scraping effect can be achieved by adjusting the working state of the scraper 402.

[0051] Furthermore, the mobile device 1 includes a frame 102, and the storage cavity 101 is located inside the frame 102; there are a number of mounting rods 103, and the mounting rods 103 are evenly distributed around the axis of the frame 102, and the axis of the mounting rod 103 is parallel to the axis of the frame 102; the sliders 104 are used in pairs, and the sliders 104 used in pairs are slidably set on the mounting rods 103 in opposite directions. After the sliders 104 used in pairs slide, the distance between the two sliders 104 is expanded or reduced; the second connecting rod 105 is used in pairs, and one end of the two second connecting rods 105 are respectively hinged on the two sliders 104; the third connecting rod 106 is used in pairs, and one end of the third connecting rod 106 is hinged on the mounting rod 103, and the other end is slidably set on the second connecting rod 105. The other ends of the second connecting rods 105 used in pairs are hinged on the traveling device 107, and after the sliders 104 used in pairs slide, the traveling device 107 approaches or moves away from the frame 102.

[0052] Furthermore, it also includes a second elastic member 108, which is sleeved on the mounting rod 103, and the two ends of the second elastic member 108 act on the frame 102 and the slider 104 respectively, for providing a force for the paired sliders 104 to approach each other, so as to keep the traveling device 107 away from the frame 102.

[0053] Furthermore, the traveling device 107 includes a traveling carrier frame 1071, and the second connecting rods 105 used in pairs are hingedly set on the traveling carrier frame 1071 at one end away from the mounting rod 103; the track 1072 is cyclically movably set on the traveling carrier frame 1071, and the track 1072 has a plurality of belt teeth 1073, and the cross-section of the belt teeth 1073 is arc-shaped. The track 1072 abuts against the inner wall of the pipe through the belt teeth 1073.

[0054] In this embodiment, the storage cavity 101 inside the frame 102 is cylindrical. There are three mounting rods 103, which are evenly distributed along the axis of the frame 102 and parallel to the axis of the frame 102. The length of the mounting rods 103 is determined according to the size of the frame 102 and actual needs, ensuring that the entire structure has good stability after the slider 104 and other components are installed.

[0055] The sliders 104 are used in pairs, and are inlaid with metal bushings inside to improve their wear resistance and load-bearing capacity. The paired sliders 104 are arranged on the mounting rods 103 in reverse sliding manner.

[0056] One end of the two second connecting rods 105 is hinged on the two sliders 104 through a pin shaft to ensure the reliability of the connection. One end of the third connecting rod 106 is hinged on the mounting rod 103 through a pin shaft, and the other end slides in a long strip slot on the second connecting rod 105, so that the relative movement between the second connecting rod 105 and the third connecting rod 106 is achieved.

[0057] The second elastic member 108 is a helical tension spring made of high-quality spring steel, which can provide the sliders 104 used in pairs with just the right force to move closer to each other.

[0058] During installation, the second elastic member 108 is sleeved on the mounting rod 103, one end of which is connected to the frame 102 and will not fall off during the operation of the equipment. The other end is connected to the slider 104, and the connection point is designed on the side of the slider 104 close to the frame 102. The pulling force provided by the second elastic member 108 can automatically move the paired sliders 104 closer to each other, and then through the transmission of the second connecting rod 105 and the third connecting rod 106, the traveling device 107 automatically moves away from the frame 102.

[0059] The traveling frame 1071 of the traveling device 107 is made of a solid steel structure and is hinged to the other end of the second connecting rod 105 used in pairs through a pin shaft. A crawler 1072 driving motor and a crawler 1072 tensioning device are installed on the traveling frame 1071. The crawler 1072 is made of a composite material of rubber and metal frame, which has good wear resistance and flexibility. A number of belt teeth 1073 are evenly distributed on its surface. The cross section of the belt teeth 1073 is arc-shaped, which can better fit the inner wall of the pipeline. The crawler 1072 driving motor drives the crawler 1072 to move in a cycle through a chain transmission mechanism, providing power for the movement of the mobile device 1 in the pipeline.

[0060] The advantage is that this design enables the equipment to flexibly adapt to pipes of different diameters, whether it is a small-diameter industrial pipe or a large-diameter municipal pipe, it can stably move in it, greatly improving the versatility and applicability of the equipment. The large-area contact between the crawler 1072 and the inner wall of the pipe and the special design of the belt teeth 1073 increase the friction and adhesion with the inner wall of the pipe, ensuring that the equipment moves forward stably, avoiding slipping, jamming, etc., and ensuring the smooth progress of the inspection work.

[0061] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A pipeline internal detection device, characterized in that: include: A moving device (1), the moving device (1) being arranged inside the pipeline and moving along the axial direction of the pipeline; A detection device (2), the detection device (2) being connected to the moving device (1) via a traction rope and being located at one end of the moving device (1); a rotating frame (3), the rotating frame (3) being arranged to rotate relative to the moving device (1) and being located at the other end of the moving device (1); the rotating frame (3), the moving device (1) and the detection device (2) being arranged in sequence along the moving direction of the moving device (1); A scraper (4), wherein the scraper (4) is provided in a plurality of numbers, the plurality of scrapers (4) being evenly distributed in the circumferential direction around the axis of the rotating frame (3) and abutting against the inner wall of the pipe, and after the rotating frame (3) rotates, the scraper (4) is used to scrape off impurities on the inner wall of the pipe; Side baffles (5), the side baffles (5) being of a plurality, two of the side baffles (5) being respectively arranged on both sides of the scraper (4), and a receiving space (6) being formed between the two side baffles (5), the scraper (4) and the rotating frame (3).

2. A pipeline internal detection device according to claim 1, characterized in that: The mobile device (1) has a storage cavity (101) inside, and further comprises: A mounting frame (7), the mounting frame (7) being arranged at one end of the moving device (1) away from the detection device (2), the rotating frame (3) being rotatably arranged on the mounting frame (7), the mounting frame (7) having a slag inlet (701), the slag inlet (701) being connected to the storage chamber (101); After the rotating frame (3) rotates, the plurality of accommodating spaces (6) are connected to the slag inlet (701) in sequence, so that impurities in the plurality of accommodating spaces (6) enter the storage chamber (101) in sequence.

3. A pipeline internal detection device according to claim 2, characterized in that: The slag inlet (701) is located at the top of the mounting frame (7), and further comprises: A guide tube (8), the guide tube (8) being arranged in the mounting frame (7), the two ends of the guide tube (8) being respectively connected to the slag inlet (701) and the storage chamber (101), and being used for guiding the impurities from the slag inlet (701) into the storage chamber (101).

4. A pipeline internal detection device according to claim 1, characterized in that: The scraper (4) comprises: A mounting seat (401), the mounting seat (401) being arranged on the rotating frame (3); The scraper (402) is rotatably mounted on the mounting seat (401), and the two side baffles (5) are respectively mounted on both sides of the scraper (402). After the scraper (402) rotates, the other end of the scraper (402) moves closer to or farther from the rotating frame (3).

5. A pipeline internal detection device according to claim 4, characterized in that: Also includes: a first connecting rod (9), one end of the first connecting rod (9) being arranged on the side baffle (5) away from the moving device (1); A rotating disk (10), wherein the rotating disk (10) is rotatably arranged on a side of the rotating frame (3) away from the moving device (1), the rotating disk (10) has a plurality of slide grooves (1001), the other end of the first connecting rod (9) is slidably arranged in the slide grooves (1001), and when the rotating disk (10) rotates, it drives the plurality of scrapers (402) to rotate synchronously.

6. A pipeline internal detection device according to claim 5, characterized in that: The rotating frame (3) has a plurality of limiting holes (301), and further comprises: a first elastic member (11), the first elastic member (11) being arranged in the slide groove (1001), the two ends of the first elastic member (11) respectively abutting against the inner wall of the slide groove (1001) and the first connecting rod (9), and being used for providing a force for the first connecting rod (9) to slide in the slide groove (1001), so that the scraper (402) moves away from the rotating frame (3); A fastener (12), wherein the fastener (12) is arranged on the rotating disk (10), and after the fastener (12) enters the limiting hole (301), it is used to limit the position of the rotating disk (10) and the rotating frame (3).

7. The pipeline internal detection device according to claim 2, characterized in that: The mobile device (1) comprises: A frame (102), wherein the storage cavity (101) is located inside the frame (102); A mounting rod (103), wherein the mounting rods (103) are in a plurality and are evenly distributed circumferentially around the axis of the frame body (102); the axis of the mounting rod (103) is parallel to the axis of the frame body (102); Slide blocks (104), the slide blocks (104) being used in pairs, the slide blocks (104) being used in pairs and being arranged on the mounting rod (103) to slide in opposite directions, and after the slide blocks (104) being used in pairs slide, the distance between the two slide blocks (104) is enlarged or reduced; A second connecting rod (105), wherein the second connecting rods (105) are used in pairs, and two second connecting rods (105) are respectively hingedly arranged on the two sliding blocks (104); A third connecting rod (106), the third connecting rod (106) is used in pairs, one end of the third connecting rod (106) is hinged on the mounting rod (103), and the other end is slidably arranged on the second connecting rod (105) A traveling device (107), wherein the other ends of the second connecting rods (105) used in pairs are hingedly arranged on the traveling device (107), and after the sliders (104) used in pairs slide, the traveling device (107) moves closer to or farther from the frame (102).

8. The pipeline internal detection device according to claim 7, characterized in that: Also includes: A second elastic member (108), the second elastic member (108) is sleeved on the mounting rod (103), and two ends of the second elastic member (108) act on the frame (102) and the slider (104) respectively, so as to provide a force for the sliders (104) used in pairs to approach each other, so as to move the traveling device (107) away from the frame (102).

9. The pipeline internal detection device according to claim 7, characterized in that: The traveling device (107) comprises: A traveling carrier (1071), wherein the second connecting rods (105) used in pairs have one end away from the mounting rod (103) hingedly arranged on the traveling carrier (1071); A crawler (1072), the crawler (1072) being arranged on the traveling carrier (1071) in a cyclically movable manner, the crawler (1072) having a plurality of belt teeth (1073), the belt teeth (1073) having an arc-shaped cross section, and the crawler (1072) being in contact with the inner wall of the pipe through the belt teeth (1073).

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