Steel pipe inner circle detection device

Abstract

The invention provides a steel pipe inner circle detection device, which relates to the technical field of steel pipe detection and comprises a main mounting frame, a line laser sensor and a reducing mechanism. A plurality of line laser sensors are uniformly arranged in the circumferential direction of the main mounting frame; the reducing mechanism is installed on the main installation frame and located in front of or behind the line laser sensor in the walking direction of the main installation frame in the steel pipe, and the telescopic end of the reducing mechanism can stretch out and draw back in the radial plane of the steel pipe and can be close to or away from the inner wall of the steel pipe; a roughness sensor and / or a wall thickness sensor are / is fixed at the telescopic end of the reducing mechanism; according to the invention, various parameters of the inner circle of the steel pipe can be detected, and the device can adapt to steel pipes with different pipe diameters.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel pipe detection, and particularly relates to a steel pipe inner circle detection device. BACKGROUND

[0002] In the field of steel pipe inner circle detection, the end part of the steel pipe inner circle is usually detected by manual operation using various auxiliary tools, and the detection efficiency and accuracy are relatively low. Moreover, the manual operation range is limited, and only part of the cross section can be detected, and continuous detection cannot be realized. For the middle region of the long steel pipe inner circle, there is a lack of detection means, and only visual judgment can be used, and the judgment result has low guiding significance.

[0003] With the development of the prior art, workers begin to use a pipeline robot or a traction rope to carry a detection structure to monitor the full-length inner circle of the steel pipe. In some working conditions, the steel pipe inner circle also needs to be polished, but the existing detection device cannot objectively evaluate the effect of the polishing process, for example, whether the target layer is completely removed, whether the base body is damaged by excessive polishing, how uniform the polishing is and the like.

[0004] Therefore, it is necessary to develop a steel pipe inner circle detection device to detect the steel pipe inner circle parameters, so as to guide and optimize the polishing parameters and process, and improve the maintenance efficiency and quality control level. SUMMARY

[0005] The purpose of the present application is to provide a steel pipe inner circle detection device to solve the problems existing in the prior art, which can not only detect various parameters of the steel pipe inner circle, but also adapt to steel pipes with different diameters.

[0006] The present application provides a steel pipe inner circle detection device, which comprises a total mounting frame, a line laser sensor and a variable diameter mechanism. The line laser sensor is uniformly arranged along the circumference of the total mounting frame. The variable diameter mechanism is installed on the total mounting frame and located in front of or behind the line laser sensor along the walking direction of the total mounting frame in the steel pipe. The telescopic end of the variable diameter mechanism can be telescoped in the radial plane of the steel pipe and can approach or move away from the inner wall of the steel pipe. The telescopic end of the variable diameter mechanism is fixed with a roughness sensor and / or a wall thickness sensor.

[0007] As an embodiment, the variable diameter mechanism comprises a rotary driving part, a gear and a rack. The output end of the rotary driving part is in transmission connection with the gear. A plurality of guide rails are uniformly distributed in the circumference of the gear. The rack is slidably arranged in the guide rail. One end of the rack is engaged with the gear. The other end of the rack is installed with the roughness sensor and / or the wall thickness sensor.

[0008] As an embodiment, the total mounting frame comprises a line laser sensor mounting frame for mounting the line laser sensor and a variable-diameter mechanism adapter frame which is detachably mounted at one end of the line laser sensor total mounting frame and on which the variable-diameter mechanism is mounted.

[0009] As an embodiment, the variable-diameter mechanism adapter frame is connected with the line laser sensor mounting frame by bolts.

[0010] As an embodiment, the adjacent line laser sensors are alternately arranged with their heads reversed.

[0011] As an embodiment, the adjacent wall thickness sensors are staggered, and the adjacent roughness sensors are staggered.

[0012] As an embodiment, the wall thickness sensor is fixedly connected with the outer wall of the roughness sensor through a first connecting plate, and a first roller is further arranged on the first connecting plate, which is used for rolling along the inner wall of the steel pipe.

[0013] As an embodiment, a second connecting plate is further arranged on the outer wall of the roughness sensor, and a second roller is mounted on the second connecting plate, which is used for rolling along the inner wall of the steel pipe, and the second connecting plate and the first connecting plate are respectively arranged on the two outer walls of the roughness sensor.

[0014] As an embodiment, the line laser sensor is uniformly arranged in a circumferential direction with 4-8; the wall thickness sensor and the roughness sensor are each uniformly arranged in a circumferential direction with 4-6.

[0015] As an embodiment, a walking robot is further included, and the total mounting frame is fixed on the walking robot.

[0016] Compared with the prior art, the present application can achieve the following technical effects: The line laser sensor, the wall thickness sensor and the roughness sensor can detect various parameters of the inner circle of the steel pipe, and a plurality of line laser sensors, wall thickness sensors and roughness sensors are arranged in a circumferential direction, so that the detection range can completely cover the inner circle of the steel pipe, avoiding missed detection, ensuring the accuracy and efficiency of detection, and the detection results can guide and optimize the processing process (such as polishing process) of the inner circle of the steel pipe. In addition, the wall thickness sensor and the roughness sensor are arranged on the telescopic end of the variable-diameter mechanism, which not only makes the wall thickness sensor and the roughness sensor closer to the inner circle of the steel pipe for detection, ensuring the detection accuracy, but also adapts to steel pipes of different diameters, having stronger adaptability. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the technical solutions in the embodiments of the present application or the prior art clearer, the accompanying drawings needed in the embodiments will be briefly introduced. Obviously, the accompanying drawings in the following description only need to be some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort.

[0018] Figure 1 The figure is a structural schematic diagram of a steel pipe inner circle detection device in an embodiment of the present application. Figure 2 The figure is a cooperation structural schematic diagram of a total mounting frame and a variable-diameter mechanism in an embodiment of the present application. Figure 3 The figure is a structural schematic diagram of a variable-diameter mechanism in an embodiment of the present application. Figure 4 The figure is a structural schematic diagram of a variable-diameter mechanism in another view in an initial state in an embodiment of the present application. Figure 5 The figure is a structural schematic diagram of a variable-diameter mechanism in an extended state in an embodiment of the present application.

[0019] Among them: 1, total mounting frame; 11, line laser sensor mounting frame; 12, variable-diameter mechanism adapter frame; 2, line laser sensor; 3, variable-diameter mechanism; 31, gear; 32, rack; 33, guide rail; 4, roughness sensor; 5, wall thickness sensor; 6, first connecting plate; 7, first roller; 8, second connecting plate; 9, second roller; 10, roughness sensor adapter frame. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without any creative effort belong to the scope of protection of the present application.

[0021] The purpose of the present application is to provide a steel pipe inner circle detection device to solve the problems in the prior art, which can not only detect various parameters of the steel pipe inner circle, but also adapt to steel pipes with different diameters.

[0022] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0023] As Figures 1-5As shown, the embodiment provides a steel pipe inner circle detection device, which comprises a total mounting frame 1, a line laser sensor 2 and a variable diameter mechanism 3; the line laser sensor 2 is uniformly provided with a plurality of line laser sensors along the circumference of the total mounting frame 1, which is used for continuously detecting the geometric parameters and surface defects of the steel pipe inner circle; the variable diameter mechanism 3 is installed on the total mounting frame 1, and along the walking direction of the total mounting frame 1 in the steel pipe, the variable diameter mechanism 3 is located in front of or behind the line laser sensor 2, the telescopic end of the variable diameter mechanism 3 can be telescoped in the radial plane of the steel pipe, and can be close to or away from the inner wall of the steel pipe; the telescopic end of the variable diameter mechanism 3 is fixed with a roughness sensor 4 and / or a wall thickness sensor 5, the roughness sensor 4 is used for detecting the roughness of the steel pipe inner circle, and the wall thickness sensor 5 is used for detecting the wall thickness of the steel pipe. The roughness sensor 4 and the wall thickness sensor 5 can be set according to the actual situation, at least one of which is selected in the embodiment Figures 1-5 In the embodiment, the total mounting frame 1 is provided with a roughness sensor and a wall thickness sensor 5 at the same time. Generally, when the variable diameter mechanism 3 is in the minimum diameter, the distance between the outermost end of the roughness sensor 4 and the wall thickness sensor 5 and the central axis of the total mounting frame 1 is not less than the distance between the outermost end of the line laser sensor 2 and the central axis of the total mounting frame 1, so as to ensure that the roughness sensor 4 and the wall thickness sensor 5 are always closer to the steel pipe inner circle than the line laser sensor 2.

[0024] In use, the total mounting frame 1 is connected with a pipe robot or a traction rope, and then is placed into the steel pipe. The line laser sensor 2 continuously detects the geometric parameters and surface defects of the steel pipe inner circle, the telescopic end of the variable diameter mechanism 3 is extended, and is close to the inner wall of the steel pipe, until the distance between the roughness sensor 4 and the wall thickness sensor 5 and the inner wall of the steel pipe reaches the detection range of the two, and the roughness sensor 4 and the wall thickness sensor 5 detect the roughness and the wall thickness of the steel pipe inner circle.

[0025] Therefore, the embodiment can detect various parameters of the steel pipe inner circle by using the line laser sensor 2, the wall thickness sensor 5 and the roughness sensor 4, and the line laser sensor 2, the wall thickness sensor 5 and the roughness sensor 4 are all provided with a plurality of sensors along the circumference, so that the detection range can completely cover the steel pipe inner circle, and the missed detection is avoided, so as to ensure the accuracy and efficiency of the detection, and the detection result can guide and optimize the processing process (such as polishing process) of the steel pipe inner circle. In addition, in the embodiment, the wall thickness sensor 5 and the roughness sensor 4 are arranged on the telescopic end of the variable diameter mechanism 3, which not only can make the wall thickness sensor 5 and the roughness sensor 4 closer to the steel pipe inner circle for detection, so as to ensure the detection accuracy, but also can adapt to steel pipes with different diameters, and has higher adaptability.

[0026] The variable diameter mechanism 3 in the embodiment comprises a rotating driving part, a gear 31 and a rack 32. The rotating driving part can be a rotating motor. The output shaft of the rotating motor is coaxially connected with the gear 31. The gear 31 is uniformly provided with a plurality of guide rails 33 in the circumferential direction. The extension direction of the guide rails 33 is parallel to the tangential direction of the gear 31. The rack 32 is slidingly arranged in the guide rails 33. One end of the rack 32 is engaged with the gear 31. The other end is provided with the roughness sensor 4 and the wall thickness sensor 5. The rotating motor drives the gear 31 to rotate, thereby driving the plurality of racks 32 to move synchronously. When the rack 32 extends outward, the roughness sensor 4 and the wall thickness sensor 5 are close to the inner circle of the steel pipe. The rotating motor reverses, thereby driving the rack 32 to retract inward, and changing the extension length of the rack 32.

[0027] The total mounting frame 1 in the embodiment comprises a line laser sensor mounting frame 11 and a variable diameter mechanism adapter frame 12. The line laser sensor mounting frame 11 is used for mounting the line laser sensor 2. The variable diameter mechanism adapter frame 12 is detachably mounted on one end of the line laser sensor 2 total mounting frame 1. The variable diameter mechanism adapter frame 12 is provided with the variable diameter mechanism 3.

[0028] The variable diameter mechanism adapter frame 12 and the line laser sensor mounting frame 11 in the embodiment are connected through bolts.

[0029] The adjacent line laser sensors 2 in the embodiment are alternately arranged in reverse order. That is, the head end of one line laser sensor 2 is in front, and the tail end is in back. The tail end of the other line laser sensor 2 adjacent in the circumferential direction is in front, and the head end is in back. The wall thickness sensor 5 and the roughness sensor 4 in the embodiment are arranged in pairs. The wall thickness sensors 5 in the adjacent groups are staggered. The roughness sensors 4 are also staggered. The distribution mode is similar to that of the line laser sensor 2. In one group, the wall thickness sensor 5 is in front, and the roughness sensor 4 is in back. In the other group adjacent in the circumferential direction, the roughness sensor 4 is in front, and the wall thickness sensor 5 is in back. The structure and distribution in the embodiment can avoid the waste of space caused by the size and distribution direction of the sensors, make the overall structure more compact, and also be beneficial to eliminate the detection blind area and realize the full coverage of the inner circle of the steel pipe.

[0030] The roughness sensor 4 in the embodiment is fixedly connected with the end of the rack 32 through the roughness sensor adapter 10. The wall thickness sensor 5 is fixedly connected with the outer wall of the roughness sensor 4 through the first connecting plate 6, and the first connecting plate 6 is further provided with the first roller 7 which is used for rolling along the inner wall of the steel pipe. In the embodiment, the outer wall of the roughness sensor 4 is further provided with the second connecting plate 8, and the second connecting plate 8 is installed with the second roller 9 which is used for rolling along the inner wall of the steel pipe. The second connecting plate 8 and the first connecting plate 6 are respectively arranged on the two outer walls of the roughness sensor 4 which are arranged opposite to each other. The first roller 7 and the second roller 9 are closer to the inner circle of the steel pipe than the wall thickness sensor 5 and the roughness sensor 4, which can assist the movement on the one hand and avoid the wall thickness sensor 5 or the roughness sensor 4 from being squeezed and damaged when the rack 32 is excessively elongated.

[0031] In the embodiment, the line laser sensor 2 is uniformly arranged in the circumferential direction at 4-8, preferably 6; the wall thickness sensor 5 and the roughness sensor 4 are both uniformly arranged in the circumferential direction at 4-6, preferably 4.

[0032] In the embodiment, the walking robot is further included, and the total mounting frame 1 is fixed on the walking robot. The walking robot in the steel pipe is a common device in the art, and the structure and walking principle thereof are well known to those skilled in the art. Therefore, the structure of the walking robot is not described in detail.

[0033] The adaptive changes according to the actual needs are within the protection scope of the present application.

[0034] In the present application, specific examples are applied to describe the principles and implementation modes of the present application. The above embodiment is only used to help understand the method and core idea of the present application; meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation mode and application range will be changed. In conclusion, the content of the specification should not be understood as the limitation of the present application.

Claims

1. A steel pipe inner circle detecting device characterized by comprising: The utility model relates to a line laser sensor total mounting frame for steel pipe, which comprises the following: A total mounting frame; A plurality of line laser sensors are evenly arranged along the circumference of the total mounting frame; And a diameter changing mechanism is installed on the total mounting frame, located in front of or behind the line laser sensors along the walking direction of the total mounting frame in the steel pipe, the telescopic end of the diameter changing mechanism can be telescoped in the radial plane of the steel pipe and can be close to or away from the inner wall of the steel pipe, and a roughness sensor and / or a wall thickness sensor are fixed on the telescopic end of the diameter changing mechanism.

2. The apparatus according to claim 1, wherein The diameter changing mechanism comprises a rotary drive part, a gear and a rack, the output end of the rotary drive part is in transmission connection with the gear, a plurality of guide rails are evenly distributed along the circumference of the gear, the rack is slidably arranged in the guide rails, one end of the rack is in meshing connection with the gear, and the other end of the rack is provided with the roughness sensor and / or the wall thickness sensor.

3. The apparatus according to claim 2, wherein The total mounting frame comprises a line laser sensor mounting frame and a diameter changing mechanism adapter, the line laser sensor mounting frame is used for mounting the line laser sensors, the diameter changing mechanism adapter is detachably mounted at one end of the line laser sensor total mounting frame, and the diameter changing mechanism is mounted on the diameter changing mechanism adapter.

4. The apparatus according to claim 3, wherein The diameter changing mechanism adapter and the line laser sensor mounting frame are connected through bolts.

5. The apparatus according to claim 1, wherein The line laser sensors are alternately arranged with their heads and tails reversed.

6. The apparatus according to claim 1, wherein The wall thickness sensors are staggered, and the roughness sensors are staggered.

7. The apparatus according to claim 1, wherein The wall thickness sensor is fixedly connected with the outer wall of the roughness sensor through a first connecting plate, and a first roller is arranged on the first connecting plate.

8. The apparatus according to claim 7, wherein A second connecting plate is arranged on the outer wall of the roughness sensor, a second roller is mounted on the second connecting plate, and the second roller is used for rolling on the inner wall of the steel pipe.

9. The apparatus according to claim 1, wherein The line laser sensors are evenly arranged along the circumference in 4-8; the wall thickness sensors and the roughness sensors are evenly arranged along the circumference in 4-6.

10. The apparatus for inspecting the inside of a steel pipe according to claim 1, wherein The total mounting frame is fixed on the walking robot.

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