A rotating bowl for use in an in-pipe detector

Abstract

The application discloses a rotating bowl for a pipeline internal detector and belongs to the technical field of pipeline internal detection. The rotating bowl for the pipeline internal detector comprises a bowl body and a plurality of steel brush strips. The plurality of steel brush strips are uniformly and spacedly embedded on the outer circumferential surface of the bowl body along the circumference of the bowl body, and each steel brush strip is arranged to extend along the same preset angle and the same rotation direction with respect to the axis of the bowl body, and the plurality of steel brush strips jointly form a spiral continuous surrounding arrangement structure on the outer circumferential surface of the bowl body. When the bowl body is carried on the pipeline internal detector and travels in the pipeline, the plurality of steel brush strips are in contact with the inner wall of the pipeline. The rotating bowl for the pipeline internal detector can make the pipeline internal detector rotate when traveling in the pipeline, realize uniform wear of the bowl body in the circumferential direction, and effectively avoid the problems of deviation and detection failure of the pipeline internal detector caused by local eccentric wear.

Description

Technical Field

[0001] This application relates to the field of pipeline inspection technology, and in particular to a rotating cup for a pipeline inspection device. Background Technology

[0002] In the field of pipeline inspection technology, pipeline detectors are core equipment to ensure the safe and stable operation of pipelines. As a key component of pipeline detectors, the piston cup mainly functions to seal the fluid medium before and after the detector. By isolating the fluid before and after the detector, a pressure difference is formed, which provides the power for the detector to move forward in the pipeline. Therefore, the structural rationality and operational stability of the piston cup directly determine the accuracy and stability of pipeline inspection, and are also an important foundation for achieving long-term safe operation and maintenance of pipelines.

[0003] In the prior art, the diaphragm cups used in pipeline detectors are mostly integral elastic components. The travel support is achieved through the contact and cooperation between the outer circumferential surface of the diaphragm cup and the inner wall of the pipeline. The surface of the diaphragm cup is usually a smooth and continuous structure, which adapts to the contact environment of the inner wall of the pipeline by its own elastic deformation.

[0004] However, in the actual testing process, conventional cup detectors in existing technologies are prone to localized wear because the cup itself does not rotate while the detector travels within the pipe. This makes the cup itself susceptible to wear under the combined effects of gravity and interference compression. Once wear occurs on one side of the cup, the detector shifts towards that side, further exacerbating wear and creating a vicious cycle. Ultimately, this leads to detector misalignment, poor test data, or even detector failure. Summary of the Invention

[0005] This application provides a rotating cup for a pipeline detector to solve the technical problem in the prior art where conventional cups do not rotate during the movement of the pipeline detector, causing localized wear of the cup body under the combined action of gravity and interference compression, which in turn leads to the pipeline detector deviating, poor detection data, or even detection failure.

[0006] To achieve the above objectives, this application provides a rotating cup for a pipe detector, comprising: The leather bowl body.

[0007] Multiple steel brush strips are evenly spaced and embedded on the outer circumferential surface of the leather cup body. Each steel brush strip is set at the same preset angle to the axis of the leather cup body and extends in the same direction of rotation. The multiple steel brush strips together form a spiral continuous surrounding arrangement on the outer circumferential surface of the leather cup body.

[0008] When the leather cup body is mounted on the pipe detector and travels inside the pipe, multiple steel brush strips come into contact with the inner wall of the pipe.

[0009] Preferably, the outer circumferential surface of the leather cup body is provided with multiple grooves, the number of grooves being the same as the number of steel brush strips, and each steel brush strip is embedded in a groove.

[0010] Preferably, the groove is a strip-shaped groove provided along the extension direction of the steel brush strip.

[0011] Preferably, the steel brush strip includes a flexible strip seat and a steel brush disposed on the flexible strip seat, the flexible strip seat being embedded in a groove.

[0012] Preferably, the steel brushes are continuously arranged along the extension direction of the flexible strip seat.

[0013] Preferably, a first fixing hole is provided at the bottom of the groove near the inner ring of the leather cup body, and a second fixing hole is provided at the position of the flexible strip seat corresponding to the first fixing hole. The steel brush strip is fixed to the leather cup body by fasteners passing through the first fixing hole and the second fixing hole.

[0014] Preferably, the flexible strip is an elastic rubber strip or a polyurethane strip.

[0015] Preferably, the outer surface of the steel brush protrudes from the outer peripheral surface of the leather cup body.

[0016] Preferably, a third fixing hole is provided on the side of the leather cup body near the inner ring, and the leather cup body is fixed to the detector inside the pipe by a fastener passing through the third fixing hole.

[0017] Preferably, the hardness of the steel brush strip is greater than the hardness of the leather cup body.

[0018] As can be seen from the above technical solution, this application provides a rotating cup for a pipeline detector, comprising: a cup body and multiple steel brush strips. The multiple steel brush strips are evenly spaced along the circumference of the cup body on its outer circumferential surface, and each steel brush strip extends at the same preset angle to the axis of the cup body and in the same direction of rotation. The multiple steel brush strips together form a spiral continuous arrangement on the outer circumferential surface of the cup body. When the cup body is mounted on the pipeline detector and travels within the pipeline, the multiple steel brush strips contact and engage with the inner wall of the pipeline. This application, by using multiple steel brush strips evenly spaced along the circumference of the cup body and extending at the same preset angle to the axis, forms a spiral continuous arrangement on the outer circumferential surface of the cup body, causing the pipeline detector to rotate around its own axis during its travel within the pipeline, thereby causing the cup body to uniformly bear the contact friction with the inner wall of the pipeline in the circumferential direction. Attached Figure Description

[0019] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1 This is one of the schematic diagrams of a rotating cup structure for a pipe detector provided in an embodiment of this application; Figure 2 This is the second schematic diagram of the rotating cup structure for the pipe detector provided in the embodiments of this application; Figure 3 One of the schematic diagrams of the structure of the rotating diaphragm body for a pipe detector provided in an embodiment of this application; Figure 4 A second schematic diagram of the structure of the rotating diaphragm body for the pipe detector provided in this application embodiment; Figure 5 A schematic diagram of the steel brush strip of a rotating cup for a pipe detector provided in an embodiment of this application; Figure 6 An enlarged schematic diagram of the first fixing hole of the rotating cup for the pipe detector provided in an embodiment of this application.

[0021] 1. Leather cup body; 11. Groove; 12. First fixing hole; 13. Third fixing hole; 2. Steel brush strip; 21. Flexible strip seat; 22. Steel brush; 23. Second fixing hole. Detailed Implementation

[0022] The embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described below do not represent all embodiments consistent with this application. They are merely examples of systems and methods consistent with some aspects of this application.

[0023] It should be noted that the brief descriptions of terms in this application are only for the convenience of understanding the embodiments described below, and are not intended to limit the embodiments of this application. Unless otherwise stated, these terms should be understood in their ordinary and common meaning.

[0024] The terms "first," "second," "third," etc., are used to distinguish similar or related objects or entities, and do not necessarily imply a specific order or sequence, unless otherwise specified. It should be understood that such terms can be used interchangeably where appropriate.

[0025] The terms “comprising” and “having”, and any variations thereof, are intended to cover but not exclusively include, for example, a product or device that includes a range of components is not necessarily limited to all of the components that are clearly listed, but may include other components that are not clearly listed or that are inherent to such product or device.

[0026] In the field of pipeline inspection technology, pipeline in-situ detectors are core equipment for ensuring the safe and stable operation of pipelines. Their operational stability and detection accuracy are directly related to the safety and reliability of pipeline maintenance. Among these, the pressure cup, as a key component of the pipeline in-situ detector, primarily serves to seal the fluid media before and after the detector. By effectively isolating the fluids before and after the detector, a stable pressure difference is formed, providing sufficient power for the smooth movement of the detector within the pipeline. Therefore, the structural rationality and operational stability of the pressure cup directly determine the accuracy and efficiency of pipeline inspection, and are also an important foundation for achieving long-term safe pipeline maintenance.

[0027] In existing technologies, conventional diaphragm cups used in pipeline detectors are mostly integral elastic components with smooth surfaces, capable of only providing basic sealing and support functions. They rely on their own elastic deformation to fit against the inner wall of the pipeline, thus providing forward propulsion for the detector. However, the smooth circumferential structure of conventional diaphragm cups prevents the generation of circumferential rotational torque, causing the detector to maintain contact friction in a fixed direction as it travels within the pipeline. Over long-term use, this easily leads to uneven localized wear.

[0028] Specifically, pipeline detectors advance under the propulsion of the fluid medium within the pipeline. Conventional pressure cups, acting as sealing and support components, have an interference fit with the pipeline wall to ensure sealing and stability. However, because conventional pressure cups are smooth circumferentially, they cannot generate circumferential rotational torque, preventing the detector from rotating during operation. This results in the pressure cup's contact with the pipeline wall remaining concentrated in a fixed area. Simultaneously, to ensure sealing performance, a certain interference pressure needs to be maintained between the pressure cup and the pipeline wall. This causes specific areas of the pressure cup to be subjected to continuous friction and pressure over a long period. Combined with gravity, areas with concentrated stress, such as the bottom of the pressure cup, are prone to uneven wear. Once uneven wear occurs on one side of the pressure cup, the detector will shift towards the worn side due to uneven stress, further exacerbating wear on that side. This creates a vicious cycle of uneven wear, shifting, and more severe uneven wear, shortening the pressure cup's lifespan, reducing sealing performance, causing data deviation, and in severe cases, even leading to detection failure. This fails to meet the high-precision and long-term requirements of pipeline inspection.

[0029] The core improvement of this application lies in the use of spirally arranged steel brush strips on the piston cup body. This generates a circumferential rotational torque as the detector travels within the pipeline, causing the detector to rotate as a whole. This achieves uniform contact and friction between the piston cup and the pipeline wall, preventing excessive wear in a single area. Simultaneously, the steel brush strips not only enhance the wear resistance of the piston cup but also improve the sealing effect, ensuring stable operation of the detector within the pipeline. Compared to conventional piston cups in existing technologies, this application effectively solves the technical problem of uneven wear through structural optimization, extending the service life of the piston cup, improving the accuracy of detection data, simplifying installation and maintenance processes, reducing operating costs, and better adapting to the inspection needs of pipelines of different specifications, providing a reliable guarantee for the safe and stable operation of pipelines.

[0030] The rotating cup of the pipe detector of this application will be described in detail below with reference to the accompanying drawings. See also... Figure 1 and attached Figure 2 The rotating cup for the pipeline detector provided in this application includes a cup body 1 and multiple steel brush strips 2.

[0031] The cup body 1 has an overall bowl-shaped structure and is used to install on the pipeline detector. When the pipeline detector travels in the pipeline, the outer circumferential surface of the cup body 1 forms an interference fit with the inner wall of the pipeline, which seals the fluid medium before and after the pipeline detector and provides forward propulsion for the pipeline detector.

[0032] The steel brush strip 2 is a long strip structure, embedded in the outer circumferential surface of the leather cup body 1. Multiple steel brush strips 2 are evenly spaced along the circumference of the leather cup body 1 on the outer circumferential surface of the leather cup body 1. This evenly spaced arrangement makes the steel brush strips 2 symmetrically distributed in the circumferential direction of the leather cup body 1.

[0033] Each steel brush strip 2 is set at the same preset angle to the axis of the leather cup body 1 and extends in the same direction of rotation. All steel brush strips 2 use the same angle value. The direction of rotation of the steel brush strip 2 refers to its inclination direction relative to the axis of the leather cup body 1. All steel brush strips 2 extend in the same direction of rotation.

[0034] The preferred angle range of this application is 25°-35°, which can be finely adjusted according to the actual application scenario. This preferred angle range is determined comprehensively based on the travel requirements of the detector inside the pipeline and the structural stress adaptability of the steel brush strip 2. When the angle between the steel brush strip 2 and the axis of the cup body 1 is less than 25°, the circumferential component of the contact reaction force of the inner wall of the pipeline on the steel brush strip 2 is insufficient, making it difficult to generate sufficient circumferential torque to drive the detector inside the pipeline to rotate. When the angle between the steel brush strip 2 and the axis of the cup body 1 is greater than 35°, the axial component of the contact reaction force generated by the contact between the steel brush strip 2 and the inner wall of the pipeline decreases, which may affect the axial travel stability of the detector inside the pipeline. At the same time, an excessively large angle will increase the local stress load when the steel brush strip 2 contacts the inner wall of the pipeline, which may shorten the service life of the steel brush strip 2. Through multiple sets of pipeline simulation tests and on-site trial operation verification, the optimal included angle range of 25°-35° can maintain the stable axial movement of the detector inside the pipeline while generating an effective circumferential torque to drive the detector inside the pipeline to rotate, and at the same time control the force load on the steel brush strip 2 within a reasonable range. In practical applications, the included angle range can be adaptively fine-tuned according to the pipeline inner diameter, fluid medium characteristics and other scenario factors.

[0035] Multiple steel brush strips 2 are independent and separate strip-shaped components, evenly spaced along the circumference of the leather cup body 1 and extending in the same direction of rotation at the same included angle. Their extension trajectories together form a spiral continuous surrounding arrangement structure on the outer circumferential surface of the leather cup body 1.

[0036] It should be noted that when the in-pipe detector operates using a rotating cup, the cup body 1 is mounted on the in-pipe detector. After the in-pipe detector enters the pipe, the fluid medium inside the pipe acts on the front of the cup body 1, creating a pressure difference through the fluid medium before and after sealing the cup body 1, propelling the in-pipe detector forward. As the cup body 1 moves forward with the in-pipe detector, multiple steel brush strips 2 embedded on the outer circumferential surface of the cup body 1 contact and engage with the inner wall of the pipe. Since the multiple steel brush strips 2 are all at the same preset angle to the axis of the cup body 1 and extend in the same direction of rotation, the multiple steel brush strips 2 together form a spiral continuous surrounding arrangement on the outer circumferential surface of the cup body 1. When the cup body 1 moves forward with the in-pipe detector, the inner wall of the pipe generates a contact reaction force on the steel brush strips 2. This contact reaction force can be decomposed into an axial component along the direction of travel of the in-pipe detector and a circumferential component perpendicular to the axial direction. Since multiple steel brush strips 2 are arranged in a spiral continuous loop, the circumferential component of all steel brush strips 2 is in the same direction, and together they form a circumferential torque that drives the diaphragm body 1 to rotate around its own axis, causing the detector inside the pipeline to rotate synchronously while moving forward.

[0037] As can be seen from the above technical solution, the rotating cup of the pipe detector provided in this embodiment, through the combination of the cup body 1 and multiple steel brush strips 2, causes the pipe detector to rotate during its movement. The rotational movement of the pipe detector causes the outer circumferential surface of the cup body 1 to uniformly bear the contact friction with the inner wall of the pipe in the circumferential direction, avoiding the problem of localized uneven wear caused by the pipe detector not rotating. The uniform wear of the cup body 1 extends the service life of the cup. The rotational movement of the pipe detector makes the cup body 1 more evenly stressed when passing through pipe bends, reducing the risk of pipe detector deviation caused by uneven stress. This application uses multiple steel brush strips 2, which are evenly spaced along the circumference of the cup body 1 and extend at the same preset angle with the axis, to form a spiral continuous surrounding arrangement on the outer circumferential surface of the cup body 1, causing the pipe detector to rotate around its own axis during its movement inside the pipe. This technical solution solves the problem in the existing technology where the conventional rubber cup causes localized wear of the rubber cup body due to the detector not rotating during its travel in the pipeline, which in turn leads to the detector's deviation and detection failure.

[0038] In some embodiments, see Figure 2 The rotating cup for the detector inside the pipe also includes a groove 11.

[0039] The groove 11 is formed on the outer peripheral surface of the leather cup body 1. There are multiple grooves 11, which are the same as the number of steel brush strips 2. Each steel brush strip 2 is embedded in a groove 11.

[0040] In some embodiments, see Figure 3 and Figure 4 The groove 11 is a strip-shaped groove provided along the extension direction of the steel brush strip 2.

[0041] The groove 11 is a strip-shaped groove with a convex cross-section. The extension direction of the strip-shaped groove is consistent with the extension direction of the corresponding steel brush strip 2. During the installation of the rotating cup, the operator first embeds each steel brush strip 2 into its corresponding strip-shaped groove, ensuring a tight fit between the steel brush strip 2 and the groove. The convex cross-section of the groove guides and limits the steel brush strip 2, ensuring accurate installation along the preset extension direction and preventing it from coming out. Then, the cup body 1 with the steel brush strips 2 installed is fixedly installed on the pipe detector. When the pipe detector moves inside the pipe, the steel brush strip 2 embedded in the strip-shaped groove contacts and engages with the inner wall of the pipe, generating a circumferential torque that drives the pipe detector to rotate.

[0042] In some embodiments, see Figure 5 The steel brush strip 2 includes a flexible strip seat 21 and a steel brush 22 fixed on the flexible strip seat 21. The flexible strip seat 21 is embedded in the groove 11.

[0043] The flexible strip seat 21 has a concave cross-section, which matches the convex cross-section of the groove 11. The flexible strip seat 21 is embedded in the groove 11. The convex-convex fit between the convex groove and the concave flexible strip seat 21 ensures that the flexible strip seat 21 is securely embedded in the groove 11, preventing it from loosening or falling off during use and improving the installation stability of the steel brush strip 2 on the leather cup body 1.

[0044] The steel brush 22 is fixedly mounted on the flexible strip seat 21. When the detector travels inside the pipe, the steel brush 22 contacts and engages with the inner wall of the pipe, generating friction between them. The contact reaction force on the steel brush 22 is transmitted to the cup body 1 through the flexible strip seat 21. The elastic properties of the flexible strip seat 21 allow the steel brush 22 to adapt to the slight undulations of the inner wall of the pipe, maintaining stable contact between the steel brush 22 and the inner wall. During contact with the inner wall of the pipe, the steel brush 22 assists the cup body in bearing part of the contact friction with the inner wall, effectively distributing the frictional load on the cup body and reducing its wear and tear.

[0045] In some embodiments, see Figure 5 The steel brush 22 is continuously arranged along the extension direction of the flexible strip seat 21.

[0046] The steel brush 22 is fixedly mounted on the flexible strip seat 21. The steel brush 22 is continuously arranged along the extension direction of the flexible strip seat 21, ensuring the continuity and stability of the frictional force between the steel brush 22 and the inner wall of the pipe. The continuous arrangement of the steel brush 22 avoids contact gaps that may occur with intermittent distribution, enabling the steel brush 22 to maintain continuous and stable contact with the inner wall of the pipe, thus ensuring a continuous and stable output of circumferential torque.

[0047] In some embodiments, see Figures 4-6 The groove 11 has a first fixing hole 12 at the bottom of the groove near the inner ring of the cup body 1. The flexible strip seat 21 has a second fixing hole 23 at the position corresponding to the first fixing hole 12. The steel brush strip 2 is fixed to the cup body 1 by fasteners passing through the first fixing hole 12 and the second fixing hole 23.

[0048] Specifically, the groove 11 is formed on the outer peripheral surface of the leather cup body 1. The first fixing hole 12 is formed at the bottom of the groove 11 near the inner ring of the leather cup body 1, and the flexible strip seat 21 has a second fixing hole 23 corresponding to the position of the first fixing hole 12. Fasteners pass through the first fixing hole 12 and the second fixing hole 23 to fix the flexible strip seat 21 together with the steel brush 22 to the leather cup body 1. Through the cooperation of the fasteners with the first fixing hole 12 and the second fixing hole 23, the steel brush strip 2 is detachably fixed to the leather cup body 1.

[0049] Fasteners such as bolts and screws can be used, and their specifications can be selected to match the size of the leather cup body.

[0050] In some embodiments, the flexible strip 21 is an elastic rubber strip or a polyurethane strip.

[0051] The flexible strip seat 21 is the basic part of the steel brush strip 2, and it is embedded in the groove 11. The flexible strip seat 21 is made of elastic rubber material or polyurethane material. The elastic rubber material or polyurethane material gives the flexible strip seat 21 good elastic deformation ability. During the assembly process of embedding it into the groove 11, it can generate adaptive deformation through its own elasticity to form a tight fit with the groove 11; and when the detector moves in the pipeline, it can also adaptively deform with the slight undulations of the inner wall of the pipeline to ensure stable contact between the steel brush 22 and the inner wall of the pipeline.

[0052] In some embodiments, see Figure 1 The outer surface of the steel brush 22 protrudes from the outer peripheral surface of the leather cup body 1.

[0053] The steel brush 22 is fixedly mounted on the flexible strip seat 21. The outer surface of the steel brush 22 protrudes from the outer peripheral surface of the cup body 1, so that it makes priority contact with the inner wall of the pipe, bears the main contact and friction with the inner wall of the pipe, assists the cup body in sharing the friction load, avoids excessive wear on the outer peripheral surface of the cup body 1, and extends the service life of the cup body 1.

[0054] When the steel brush 22 wears out after long-term use, the operator only needs to remove the worn steel brush strip 2 from the groove 11 for replacement, without disassembling or replacing the leather cup body 1. This split structure design allows the easily worn steel brush 22 to be replaced separately, while the leather cup body 1, as the basic load-bearing component, can continue to be used, reducing maintenance costs and replacement difficulty.

[0055] In some embodiments, see Figure 3 The leather cup body 1 has a third fixing hole 13 on the side near the inner ring. The leather cup body 1 is fixed to the detector inside the pipe by a fastener passing through the third fixing hole 13.

[0056] The cup body 1 is the basic supporting component for the rotating cup. The third fixing hole 13 is located on the side of the cup body 1 near the inner ring. Fasteners pass through the third fixing hole 13 to fix the cup body 1 to the pipe detector. The cooperation between the fasteners and the third fixing hole 13 achieves a detachable and fixed connection between the cup body 1 and the pipe detector.

[0057] In some embodiments, the hardness of the steel brush strip 2 is greater than the hardness of the leather cup body 1.

[0058] The diaphragm body 1 is made of polyurethane material, which has good elasticity and sealing performance. The steel brush strip 2 is made of metal or wear-resistant alloy material, and the overall hardness of the steel brush strip 2 is greater than that of the diaphragm body 1. When the steel brush strip 2 comes into contact with the inner wall of the pipe, its higher hardness allows it to withstand the friction and wear generated during contact with the inner wall of the pipe, maintaining effective contact with the inner wall of the pipe during long-term use.

[0059] Similar parts between the embodiments provided in this application can be referred to mutually. The specific implementation methods provided above are only a few examples under the overall concept of this application and do not constitute a limitation on the scope of protection of this application. For those skilled in the art, any other implementation methods extended from the solution of this application without creative effort shall fall within the scope of protection of this application.

Claims

1. A rotating cup for a pipe detector, characterized in that, include: Leather bowl body (1); Multiple steel brush strips (2) are evenly spaced and embedded on the outer peripheral surface of the leather cup body (1) along the circumference of the leather cup body (1), and each steel brush strip (2) is arranged at the same preset angle with the axis of the leather cup body (1) and extends in the same direction of rotation; the multiple steel brush strips (2) together form a spiral continuous surrounding arrangement structure on the outer peripheral surface of the leather cup body (1); When the leather cup body (1) is mounted on the pipe detector and travels in the pipe, the multiple steel brush strips (2) all come into contact with the inner wall of the pipe.

2. The rotating cup for a pipe detector according to claim 1, characterized in that, The outer peripheral surface of the leather cup body (1) is provided with a plurality of grooves (11), the number of grooves (11) is the same as the number of steel brush strips (2), and each steel brush strip (2) is respectively embedded in one of the grooves (11).

3. The rotating cup for a pipe detector according to claim 2, characterized in that, The groove (11) is a strip-shaped groove provided along the extension direction of the steel brush strip (2).

4. The rotating cup for a pipe detector according to claim 3, characterized in that, The steel brush strip (2) includes a flexible strip seat (21) and a steel brush (22) disposed on the flexible strip seat (21), wherein the flexible strip seat (21) is embedded in the groove (11).

5. The rotating cup for a pipe detector according to claim 4, characterized in that, The steel brush (22) is continuously arranged along the extension direction of the flexible strip seat (21).

6. The rotating cup for a pipe detector according to claim 4, characterized in that, The groove (11) has a first fixing hole (12) at the bottom of the groove near the inner ring of the leather cup body (1). The flexible strip seat (21) has a second fixing hole (23) at the position corresponding to the first fixing hole (12). The steel brush strip (2) is fixed to the leather cup body (1) by fasteners passing through the first fixing hole (12) and the second fixing hole (23).

7. The rotating cup for a pipe detector according to claim 4, characterized in that, The flexible strip seat (21) is an elastic rubber strip or a polyurethane strip.

8. The rotating cup for a pipe detector according to claim 4, characterized in that, The outer surface of the steel brush (22) protrudes from the outer peripheral surface of the leather cup body (1).

9. The rotating cup for a pipe detector according to claim 1, characterized in that, The leather cup body (1) has a third fixing hole (13) on the side near the inner ring. The leather cup body (1) is fixed to the detector inside the pipe by a fastener passing through the third fixing hole (13).

10. The rotating cup for a pipe detector according to claim 1, characterized in that, The hardness of the steel brush strip (2) is greater than that of the leather cup body (1).

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