A pipeline inner wall nondestructive testing device

Abstract

The utility model discloses a pipeline inner wall nondestructive testing device relates to pipeline detection technical field, including main part structure, mobile structure and detection structure, and the main part structure includes center tube and propulsion head, and the propulsion head is installed in center tube length direction one end, and mobile structure includes the pasting board, push assembly and positioning assembly, and a plurality of pasting boards evenly distribute in center tube outside, and push assembly rotatory mounting is installed in center tube outer wall and is used for connecting pasting board. This pipeline inner wall nondestructive testing device can not only realize image acquisition in the propulsion process, but also can carry out vibration detection, and in the image acquisition process, the image detection precision can be improved by scraping the adherend on the pipe wall, thereby the nondestructive testing of the pipeline inner wall is realized through the detection mode of image and vibration combination, so as to be convenient for in the case of guaranteeing that the detection effect is more delicate and perfect, the damage position of surface not easy to observe and located in the pipeline inside is identified and positioned, and the practicability and use effect of the device are effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection technology, and more specifically, to a non-destructive testing device for the inner wall of a pipeline. Background Technology

[0002] Pipeline inspection refers to the operation of using the pipeline medium to drive a detector to run inside the pipeline, detect and record the deformation, corrosion and other damage of the pipeline in real time, and accurately locate the damage. Most oil and gas pipelines are buried underground. Through pipeline inspection, various defects and damages can be detected in advance, the degree of danger of each pipeline section can be understood, accidents can be prevented and effectively reduced, and pipeline maintenance funds can be saved. It is an important measure to ensure pipeline safety.

[0003] Chinese utility model patent CN219473081U discloses a non-destructive testing device suitable for the interior of pipes, including a left shell; the right side of the left shell has a right shell, and the left wall of the right shell is rotatably connected to a first rotating shaft via a first bearing. An upper bevel gear is located at the right end of the first rotating shaft. The inner wall of the right shell is rotatably connected to a second rotating shaft via a second bearing. A lower bevel gear is located at the upper end of the second rotating shaft, and the lower bevel gear meshes with the upper bevel gear. This non-destructive testing device for the interior of pipes uses spring force to keep the camera position at the axis of the pipe. The spring force and sliding friction damping absorb the shaking force on the camera, improving the stability of the image and making it easy to use. However, while the above-mentioned non-destructive testing device for the interior of pipes solves the problem of uneven pipe walls, it only has a single testing method and is not convenient for cleaning the pipe wall. The test data is affected by factors such as sediment, microorganisms, and corrosion products caused by long-term use in the pipe, resulting in low reliability of image detection and poor practicality. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a non-destructive testing device for the inner wall of a pipeline, which uses a combination of image detection and vibration detection to achieve non-destructive testing of the inner wall of the pipeline. This not only improves the reliability of the test results, but also enables the identification and location of structural damage, greatly enhancing the practicality and effectiveness of the device.

[0005] To achieve the above objectives, this utility model provides a non-destructive testing device for the inner wall of a pipeline, comprising:

[0006] The main structure includes a central tube and a propulsion head installed at one end of the central tube along its length.

[0007] The movable structure includes several plates evenly distributed on the outside of the central tube, a pushing component rotatably mounted on the outer wall of the central tube and used to connect the plates, and several positioning components evenly mounted on the pushing head. The plates are arranged parallel to the central tube, the pushing component is used to adjust the distance between the plates and the center point of the central tube, and the positioning components are arranged perpendicular to the central tube.

[0008] The detection structure includes several first detection components installed on the side of the propulsion head away from the central tube, a rear detection assembly installed on the end of the central tube away from the propulsion head, and a vibration detection assembly installed on the side of the patch plate away from the central tube. The first detection components and the rear detection assembly are used for image acquisition, and the vibration detection assembly is used for vibration detection.

[0009] When the plate is attached to the inner wall of the pipe, the distance between the plate and the center point of the central tube is extended by increasing the length of the pushing component, so as to push the central tube forward. Repeatedly adjusting the length of the pushing component can achieve continuous advancement of the central tube. The positioning component is used to restrict the movement of the central tube when the length of the pushing component shortens and the plate moves away from the inner wall of the pipe. The detection structure is used to perform image detection and vibration detection on the inner wall of the pipe during advancement.

[0010] Furthermore, the pushing assembly includes a first connecting rod rotatably mounted on the outside of the central tube at one end, a second connecting rod rotatably mounted on the plate at one end and hinged to the first connecting rod at the other end, and a first linear actuator rotatably mounted on the second connecting rod at one end and hinged to the first connecting rod at the other end. The first linear actuator is used to adjust the tilt angle of the first connecting rod and the second connecting rod to realize the extension and retraction adjustment of the length dimension of the pushing assembly.

[0011] Furthermore, the positioning component includes a second linear actuator mounted on the propulsion head and perpendicular to the central tube, and a stop block mounted on the output end of the second linear actuator. The positioning component is adapted to restrict the movement of the central tube when the stop block abuts against the inner wall of the pipe.

[0012] Furthermore, the vibration detection assembly includes a vibrator installed on the side of the plate away from the central pipe and several detectors, with the detectors evenly distributed on the outside of the vibrator. The vibrator is adapted to generate vibration when the plate is attached to the inner wall of the pipe, and the detectors installed during this process can detect various vibration parameters during the vibration generation and reflection process.

[0013] Furthermore, an anti-slip component is provided on the side of the plate away from the central tube. The anti-slip component is used to increase friction, so as to reduce the risk of the plate slipping on the inner wall of the pipe when the plate is in close contact with the inner wall of the pipe.

[0014] Furthermore, the rear detection assembly includes a mounting base installed on the outer periphery of the end of the central tube away from the propulsion head, and a second detection component installed within the mounting base and facing the side of the central tube away from the propulsion head.

[0015] Furthermore, both the propulsion head and the mounting base are conical.

[0016] Furthermore, the non-destructive testing device for the inner wall of the pipeline also includes:

[0017] The anti-clogging structure includes a material guiding assembly installed inside the central tube. The central tube has several feed ports on its outer periphery at one end inside the propulsion head. The outer side of the propulsion head has a discharge groove and a feed groove communicating with the feed ports. The outer wall of the propulsion head is provided with scrapers for scraping the inner wall of the pipe.

[0018] Furthermore, the material guiding assembly includes a driving component installed inside the central tube and an auger shaft installed at the output end of the driving component. The auger shaft rotates to transport the material entering the front end of the central tube to the rear end of the central tube. A fixing plate is installed on the inner wall of the central tube and is rotatably connected to the auger shaft away from the driving component.

[0019] Furthermore, a number of connectors are horizontally inserted on the side of the propulsion head away from the central tube, and a threaded groove is opened on the side of the central tube near the propulsion head to be threadedly connected to the connectors.

[0020] Compared with the prior art, this utility model has the following advantages and effects:

[0021] 1. The non-destructive testing device for the inner wall of the pipeline in this utility model achieves the movement and advancement of the device through the alternating operation of the pushing component and the positioning component. During the advancement process, the first detection component and the second detection component, which are respectively set at the front and rear ends of the device's movement direction, can both realize image acquisition. Moreover, the image information of the inner wall of the pipeline acquired by the second detection component is the image information after the scraper has removed the adhering material on the inner wall of the pipeline, which can more clearly and accurately realize the detection of the inner wall surface of the pipeline. In addition, the vibration detection component can identify and locate the damage to the inner wall of the pipeline during the advancement process. Thus, the non-destructive testing of the inner wall of the pipeline is realized through the detection method of combining image and vibration. Not only is the detection more precise and complete, but it can also identify and locate the damaged parts that are not easy to observe from the inner wall surface of the pipeline and are located inside the pipeline, which greatly improves the practicality and effectiveness of the device.

[0022] 2. The non-destructive testing device for the inner wall of the pipeline in this utility model can guide the accumulated material in front of the propulsion head into the central pipe by setting a material drop chute and a material feed chute, so as to facilitate the material guide component to transport the material to the rear end of the central pipe in the direction of movement, so as to prevent the large accumulation of accumulated material from affecting the propulsion of the device. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the non-destructive testing device for the inner wall of a pipe in an embodiment of this utility model;

[0024] Figure 2 This is a side view of the non-destructive testing device for the inner wall of a pipe in this embodiment of the present invention.

[0025] Figure 3 for Figure 2 A schematic diagram of the cross-sectional structure at point AA.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1-Center tube;

[0028] 11-Feed inlet;

[0029] 2-Propeller head;

[0030] 21-Scraper blade; 22-Discharge chute; 23-Feed chute; 24-Connector; 25-First detection component;

[0031] 3- Feeding assembly;

[0032] 31-Drive component; 32-Screw shaft; 33-Fixing plate;

[0033] 4-Panel;

[0034] 41-Anti-slip components;

[0035] 5-Vibration detection components;

[0036] 51-Vibrator; 52-Detector;

[0037] 6-Driven components;

[0038] 61-First link; 62-Second link; 63-First linear actuator;

[0039] 7-Post-detection components;

[0040] 71-Mounting base; 72-Second detection component;

[0041] 8-Positioning components;

[0042] 81 - Second linear actuator; 82 - Abutment block. Detailed Implementation

[0043] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0044] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can also refer to the internal connection of two components; and they can refer to a wireless connection or a wired connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] Please see Figure 1-3 As shown in the figure, this utility model embodiment provides a non-destructive testing device for the inner wall of a pipeline, including a main structure, a moving structure, and a testing structure.

[0046] The main structure includes a central tube 1 and a propulsion head 2, with the propulsion head 2 installed at one end of the central tube 1 along its length.

[0047] The moving structure includes a plate 4, a pushing component 6, and a positioning component 8. Several plates 4 are evenly distributed on the outside of the central tube 1. The pushing component 6 is rotatably mounted on the outer wall of the central tube 1 and is used to connect the plates 4. Several positioning components 8 are evenly mounted on the pushing head 2. The plates 4 are set parallel to the central tube 1. The pushing component 6 is used to adjust the distance between the plates 4 and the center point of the central tube 1. The positioning components 8 are set perpendicular to the central tube 1.

[0048] The detection structure includes a first detection component 25, a rear detection component 7, and a vibration detection component 5. Several first detection components 25 are installed on the side of the propulsion head 2 away from the central tube 1, the rear detection component 7 is installed on the end of the central tube 1 away from the propulsion head 2, and the vibration detection component 5 is installed on the side of the plate 4 away from the central tube 1. The first detection component 25 and the rear detection component 7 are both used for image acquisition, and the vibration detection component 5 is used for vibration detection.

[0049] When the plate 4 is attached to the inner wall of the pipe, the distance between the plate 4 and the center point of the central tube 1 is extended by increasing the length of the pushing component 6, so as to push the central tube 1 forward. Repeatedly adjusting the length of the pushing component 6 can achieve the continuous advancement of the central tube 1. The positioning component 8 is used to restrict the movement of the central tube 1 when the length of the pushing component 6 is shortened, causing the plate 4 to move away from the inner wall of the pipe. The detection structure is used to detect different positions on the inner wall of the pipe through vibration detection and image detection during the advancement process.

[0050] As a further description of the above scheme, the central tube 1 and the push head 2 are designed to be detachable. Therefore, when used on pipe inner walls of different sizes, push heads 2 of different sizes should be selected. The outer wall size of the selected push head 2 should be as close as possible to the size of the inner wall of the pipe to be inspected.

[0051] Please see Figure 1-3 As shown, the actuating assembly 6 includes a first connecting rod 61, a second connecting rod 62, and a first linear actuator 63. One end of the first connecting rod 61 is rotatably mounted on the outside of the central tube 1. One end of the second connecting rod 62 is rotatably mounted on the plate 4, and the other end is hinged to the first connecting rod 61. One end of the first linear actuator 63 is rotatably mounted on the second connecting rod 62 and hinged to the other end of the first connecting rod 61. The first linear actuator 63 is used to adjust the tilt angle of the first connecting rod 61 and the second connecting rod 62 to achieve telescopic adjustment of the length of the actuating assembly 6.

[0052] Please see Figure 2-3 As shown, the positioning component 8 includes a second linear actuator 81 and a stop block 82. The second linear actuator 81 is mounted on the push head 2 and is perpendicular to the central tube 1. The stop block 82 is mounted on the output end of the second linear actuator 81. The positioning component 8 is adapted to restrict the movement of the central tube 1 when the stop block 82 abuts against the inner wall of the pipe.

[0053] It should be noted that the first linear actuator 63 and the second linear actuator 81 proposed in this application are both linear actuators with adjustable telescopic distance, such as hydraulic rods, electric actuators, cylinders, etc. In this embodiment, the first linear actuator 63 and the second linear actuator 81 are both exemplified by electric actuators.

[0054] Please see Figure 1 and Figure 3 As shown, the vibration detection assembly 5 includes a vibrator 51 and a detector 52. The vibrator 51 and several detectors 52 are installed on the side of the plate 4 away from the central pipe 1, and the detectors 52 are evenly distributed on the outside of the vibrator 51. The vibrator 51 is adapted to generate vibration when the plate 4 is attached to the inner wall of the pipe. During this process, the detectors 52 can detect various vibration parameters during the vibration generation and reflection process. When the parameters detected by the detector are abnormal, it indicates that there is a high probability that the current detection part is damaged.

[0055] As a further description of the above scheme, the detector 52 is composed of a sensor or detection system used in the prior art to identify, measure and analyze vibration phenomena in machinery or structures, and is used to monitor parameters such as frequency, phase, waveform and peak value of vibration waves generated during vibration occurrence and reflection, such as acoustic emission sensors, MEMS sensors, etc.

[0056] Please see Figure 1-3 As shown, an anti-slip component 41 is provided on the side of the plate 4 away from the central pipe 1. The anti-slip component 41 is used to increase friction so as to reduce the risk of the plate 4 slipping on the inner wall of the pipe when the plate 4 is in close contact with the inner wall of the pipe.

[0057] As a preferred embodiment of the above solution, the anti-slip component 41 is a structure that prevents slippage by increasing the friction of the contact surface or changing the surface morphology. The anti-slip component 41 can be a material-modified anti-slip structure or a mechanical structure anti-slip structure. Material-modified anti-slip structures include natural high-friction materials such as rubber, silicone, and polyurethane. Mechanical structure anti-slip structures include suction cups, barbs / ratchets, elastic deformation designs (anti-slip mats), etc. In this embodiment, the anti-slip component 41 is an example of an anti-slip mat.

[0058] Please see Figure 2-3 As shown, the rear detection component 7 includes a mounting base 71 and a second detection component 72. The mounting base 71 is installed on the outer periphery of the end of the central tube 1 away from the propulsion head 2. The second detection component 72 is installed inside the mounting base 71 and faces the side of the central tube 1 away from the propulsion head 2, so as to facilitate the detection of the rear side of the central tube 1 in the direction of travel by the second detection component 72. Its detection result can be mutually verified with the result of the first detection component 25 in order to maintain a better image detection effect.

[0059] Please see Figure 1-3 As shown, both the push head 2 and the mounting base 71 are conical, which allows the first detection component 25 mounted on the push head 2 and the second detection component 72 mounted on the mounting base 71 to face the inner wall of the pipe, thereby facilitating better image detection.

[0060] Please see Figure 1-3 As shown, the non-destructive testing device for the inner wall of the pipeline also includes an anti-clogging structure, which includes a material guiding component 3. The material guiding component 3 is installed inside the central tube 1 and is used to realize material conveying. Several feed ports 11 are opened on the outer periphery of one end of the central tube 1 located inside the propulsion head 2. The outer side of the propulsion head 2 is provided with a drop trough 22 and a feed trough 23 communicating with the feed ports 11. The outer wall of the propulsion head 2 is provided with a scraper 21 for scraping the inner wall of the pipeline. During the advancement of the central tube 1 and the propulsion head 2, the scraper 21 can scrape the inner wall of the pipeline to clean the inner wall of the pipeline and prevent the accumulation of scale, mud, microorganisms, corrosion products and other substances from affecting the image acquisition effect.

[0061] Please see Figure 3 As shown, the material guiding assembly 3 includes a driving component 31 and an auger shaft 32. The driving component 31 is installed inside the central tube 1, and the auger shaft 32 is installed at the output end of the driving component 31. The rotation of the auger shaft 32 is used to transport the material entering the front end of the central tube 1 to the rear end of the central tube 1. A fixing plate 33 is installed on the inner wall of the central tube 1 and is rotatably connected to the auger shaft 32 away from the driving component 31. The fixing plate 33 is used to improve the installation stability of the auger shaft 32 inside the central tube 1.

[0062] Please see Figure 3 As shown, several connectors 24 are horizontally inserted on the side of the propulsion head 2 away from the central tube 1, and a threaded groove is opened on the side of the central tube 1 near the propulsion head 2 to be threadedly connected to the connectors 24.

[0063] As a preferred embodiment of the above scheme, the connector 24 is provided with a screw, which facilitates the connector 24 to pass through the push head 2 and extend into the threaded groove of the central tube 1, thereby maintaining the stable connection between the central tube 1 and the push head 2.

[0064] It should be noted that the first detection component 25 and the second detection component 72 proposed in this application are both well-known and commonly used components of cameras and spotlights in the art, used to achieve image acquisition through the camera; in addition, this application also provides a data processing structure (not shown in the figure) for analyzing and processing image information and vibration information, and the provided data processing structure can also wirelessly transmit detection data to external devices. Since the data processing structure is a commonly used and well-known structure in the art, it will not be described in detail in the text.

[0065] The working process of the above-mentioned non-destructive testing device for the inner wall of the pipeline is as follows:

[0066] When using this non-destructive testing device for the inner wall of a pipe, the entire device must first be placed inside the pipe to be tested. Then, the pushing component 6 is operated to increase its length so that the plate 4 can fit against the inner wall of the pipe. As the length of the pushing component 6 continues to extend, the central tube 1 will move forward relative to the contact area between the plate 4 and the inner wall of the pipe. During this process, if the outer wall size of the pushing head 2 matches the inner wall size of the pipe, the scraper 21 set on the pushing head 2 can clean the adhering substances on the inner wall of the pipe, thereby facilitating the improvement of image detection quality.

[0067] When the length of the pushing component 6 is extended to its limit, the second linear actuator 81 in the positioning component 8 can be used to press the abutment 82 against the inner wall of the pipe. At this time, the pushing component 6 can be retracted without the central tube 1 moving. After the pushing component 6 is retracted, the size of the pushing component 6 is extended again to push the plate 4 to fit against the pipe wall. The abutment 82 in the positioning component 8 can then be retracted to make the central tube 1 move forward under the push of the pushing component 6. Repeating the above operation can achieve the continuous advancement of the central tube 1.

[0068] During the advancement of the central tube 1, the scraper 21 can scrape the inner wall of the pipe, thereby cleaning the inner wall of the pipe. The scraped material can enter the central tube 1 through the material drop chute 22. In addition, the material accumulated in the pipe can also enter the central tube 1 through the feed chute 23 as the push head 2 moves. The rotation of the auger shaft 32 in the material guide assembly 3 in the central tube 1 can transport the material to the rear end of the central tube 1, thereby preventing the accumulated material from piling up in front of the push head 2 and affecting its advancement effect. Moreover, the scraped pipe wall makes it easier to obtain image information, which can make the obtained image information more accurate and reliable.

[0069] During the advancement of the central tube 1, both the first detection component 25 installed on the advancement head 2 and the second detection component 72 installed at the rear end of the central tube 1 can perform image acquisition, thereby facilitating the detection of the inner wall surface of the pipe through image information. In addition, when the stop block 82 in the positioning component 8 is pressed against the inner wall of the pipe and the pushing component 6 is not retracted, the vibrator 51 in the vibration detection component 5 can be operated to generate a vibration effect, thereby facilitating the detection of internal damage to the inner wall of the pipe by using the detector 52 to detect the vibration wave, and thus realizing the detection, identification and location of internal damage to the pipe.

[0070] Although the present invention has been disclosed above, its protection scope is not limited thereto. Those skilled in the art can make various changes and modifications without departing from the spirit and scope of this disclosure, and all such changes and modifications will fall within the protection scope of this invention.

Claims

1. A non-destructive testing device for the inner wall of a pipeline, characterized in that, include: The main structure includes a central tube (1) and a propulsion head (2) installed at one end of the central tube (1) along its length. The movable structure includes several plates (4) evenly distributed on the outside of the central tube (1), a pushing component (6) rotatably mounted on the outer wall of the central tube (1) and used to connect the plates (4), and several positioning components (8) evenly mounted on the pushing head (2). The plates (4) are arranged parallel to the central tube (1), the pushing component (6) is used to adjust the distance between the plates (4) and the center point of the central tube (1), and the positioning components (8) are arranged perpendicular to the central tube (1). The detection structure includes several first detection components (25) installed on the side of the propulsion head (2) away from the central tube (1), a rear detection assembly (7) installed on the end of the central tube (1) away from the propulsion head (2), and a vibration detection assembly (5) installed on the side of the plate (4) away from the central tube (1). The first detection components (25) and the rear detection assembly (7) are used for image acquisition, and the vibration detection assembly (5) is used for vibration detection. When the plate (4) is attached to the inner wall of the pipe, the distance between the plate (4) and the center point of the central tube (1) is extended by increasing the length of the pushing component (6) so as to push the central tube (1) forward. The continuous advancement of the central tube (1) can be achieved by repeatedly adjusting the length of the pushing component (6). The positioning component (8) is used to restrict the movement of the central tube (1) when the length of the pushing component (6) is shortened, causing the plate (4) to move away from the inner wall of the pipe. The detection structure is used to perform image detection and vibration detection on the inner wall of the pipe during the advancement process.

2. The non-destructive testing device for the inner wall of a pipeline according to claim 1, characterized in that, The pushing assembly (6) includes a first connecting rod (61) rotatably mounted on the outside of the central tube (1), a second connecting rod (62) rotatably mounted on the plate (4) and hinged to the first connecting rod (61) at the other end, and a first linear actuator (63) rotatably mounted on the second connecting rod (62) and hinged to the first connecting rod (61) at the other end. The first linear actuator (63) is used to adjust the tilt angle of the first connecting rod (61) and the second connecting rod (62) to realize the extension and retraction adjustment of the length dimension of the pushing assembly (6).

3. The non-destructive testing device for the inner wall of a pipeline according to claim 1, characterized in that, The positioning component (8) includes a second linear actuator (81) mounted on the propulsion head (2) and perpendicular to the central tube (1) and a stop (82) mounted on the output end of the second linear actuator (81). The positioning component (8) is adapted to restrict the movement of the central tube (1) when the stop (82) abuts against the inner wall of the pipe.

4. The non-destructive testing device for the inner wall of a pipeline according to claim 1, characterized in that, The vibration detection assembly (5) includes a vibrator (51) installed on the side of the plate (4) away from the central pipe (1) and several detectors (52), and the several detectors (52) are evenly distributed on the outside of the vibrator (51). The vibrator (51) is adapted to generate vibration when the plate (4) is attached to the inner wall of the pipe. During this process, the detectors (52) can detect various vibration parameters during the vibration generation and reflection process.

5. The non-destructive testing device for the inner wall of a pipeline according to claim 1, characterized in that, The side of the plate (4) away from the central tube (1) is provided with an anti-slip component (41). The anti-slip component (41) is used to increase friction so as to reduce the risk of the plate (4) slipping on the inner wall of the pipe when the plate (4) is in close contact with the inner wall of the pipe.

6. The non-destructive testing device for the inner wall of a pipeline according to claim 1, characterized in that, The rear detection assembly (7) includes a mounting base (71) installed on the outer periphery of the end of the central tube (1) away from the propulsion head (2) and a second detection component (72) installed in the mounting base (71) and facing the side of the central tube (1) away from the propulsion head (2).

7. The non-destructive testing device for the inner wall of a pipeline according to claim 6, characterized in that, Both the propulsion head (2) and the mounting base (71) are conical.

8. The non-destructive testing device for the inner wall of a pipeline according to claim 1, characterized in that, Also includes: The anti-clogging structure includes a material guiding assembly (3) installed in the central tube (1). The central tube (1) has several feed ports (11) on its outer periphery at one end inside the push head (2). The push head (2) has a drop groove (22) and a feed groove (23) connected to the feed ports (11) on its outer side. The outer wall of the push head (2) is provided with a scraper (21) for scraping the inner wall of the pipe.

9. The non-destructive testing device for the inner wall of a pipeline according to claim 8, characterized in that, The material guiding assembly (3) includes a drive unit (31) installed inside the central tube (1) and an auger shaft (32) installed at the output end of the drive unit (31). The auger shaft (32) rotates to transport the material entering the front end of the central tube (1) to the rear end of the central tube (1). A fixing plate (33) is installed on the inner wall of the central tube (1) and is rotatably connected to the auger shaft (32) away from the drive unit (31).

10. The non-destructive testing device for the inner wall of a pipeline according to claim 1, characterized in that, The push head (2) has several connectors (24) horizontally inserted on the side away from the central tube (1), and the central tube (1) has a threaded groove on the side close to the push head (2) that is threaded to the connectors (24).

Images