A pipeline wall thickness detection device

Abstract

The utility model provides a pipeline wall thickness detection device, include: support, walking mechanism is used for driving support along the axial movement of pipeline, adjusting mechanism is used for adjusting the distance of walking mechanism and support along the radial of pipeline, detection module is set in the central position of support, and the axis of detection module coincides with the axis of pipeline, and detection module is used for measuring the radial distance between the lateral wall of pipeline and axis, through adjusting mechanism is connected between support and walking mechanism, realizes the distance adjustment of walking mechanism and support along the radial of pipeline, to adapt to the change of pipeline inner diameter, to meet the detection of complex pipeline inner wall corrosion pit such as variable diameter structure, through detection module measures the radial distance between the lateral wall of pipeline and axis, can effectively measure the depth and shape of pipeline inner wall corrosion pit, thereby detects the wall thickness change of pipeline.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection technology, and in particular to a pipeline wall thickness detection device. Background Technology

[0002] A venturi tube is a device for measuring the pressure difference of fluids, used to measure the volumetric flow rate of a single-phase steady fluid in a closed pipeline. The venturi tube has a variable-diameter flow channel; the cross-sectional area of ​​the throat in the middle section is smaller than that of the two side channels. As the pipeline ages, the wall thickness gradually decreases due to factors such as media corrosion, erosion, and external forces. Once the wall thickness falls below a safe threshold, it can easily lead to serious accidents such as leaks and ruptures.

[0003] Currently, existing methods for pipe wall thickness testing typically employ ultrasonic testing. Ultrasonic testing utilizes the propagation characteristics of ultrasonic waves in different media, calculating the wall thickness by measuring the time difference between the reflected echoes from the inner and outer walls of the pipe. While this method is relatively simple to operate, the accuracy and reliability of the results can be significantly affected when inspecting pipes with complex structures or in situations with uneven surfaces or poor coupling. Furthermore, due to the unique design of the variable-diameter flow channel inside a Venturi tube, it is impossible to accurately detect corrosion using ultrasonic flaw detection techniques, and the depth of corrosion pits cannot be measured.

[0004] Therefore, in response to the existing technical problems, there is an urgent need to propose a pipe wall thickness detection device suitable for Venturi tubes. Summary of the Invention

[0005] This invention provides a pipe wall thickness detection device to solve the problem that existing pipe wall thickness detection devices cannot be applied to pipe wall thickness detection for flow channels with different inner diameters.

[0006] This utility model provides a pipe wall thickness detection device, comprising:

[0007] support;

[0008] A traveling mechanism, mounted on the support, is used to engage with the inner wall of the pipe, allowing the support to move axially along the pipe.

[0009] An adjustment mechanism is provided on the support, and the adjustment mechanism is connected to the traveling mechanism. The adjustment mechanism is used to adjust the distance between the traveling mechanism and the support along the radial direction of the pipeline.

[0010] A detection module is positioned at the center of the support, with the axis of the detection module coinciding with the axis of the pipe. The detection module is used to measure the radial distance between the sidewall of the pipe and the axis.

[0011] In one embodiment of the present invention, the bracket includes a drive wheel frame and a driven wheel frame, the drive wheel frame and the driven wheel frame being respectively disposed at both ends of the detection module along the axial direction.

[0012] In one embodiment of the present invention, both the drive wheel frame and the driven wheel frame have at least two mounting seats evenly distributed circumferentially.

[0013] In one embodiment of the present invention, the mounting base on the drive wheel frame and the mounting base on the driven wheel frame are arranged in a staggered manner along the circumference of the pipeline.

[0014] In one embodiment of the present invention, the adjusting mechanism includes a telescopic joint and a telescopic component. The telescopic joint is installed in the mounting base, and the telescopic component is connected between the mounting base and the telescopic joint. The telescopic component is used to expand or contract the telescopic joint.

[0015] In one embodiment of the present invention, the walking mechanism includes a roller, a mounting frame, and a walking drive component. The mounting frame is disposed on the telescopic joint, the roller is rotatably disposed on the mounting frame, and the walking drive component is connected to any one of the mounting frames on the drive wheel frame and to the roller rotatably disposed on the mounting frame.

[0016] In one embodiment of the present invention, the mounting bracket and the radial plane of the pipe on which the expansion joint is located have an axial offset angle α.

[0017] In one embodiment of this utility model, the axial offset angle α is 5° to 10°.

[0018] In one embodiment of the present invention, an angle adjustment component is provided between the mounting bracket and the telescopic joint, and the angle adjustment component is used to adjust the axial offset angle α.

[0019] In one embodiment of the present invention, the detection module includes a detection component and a detection driving component. The detection driving component is disposed on the bracket. The detection component is connected between the drive wheel frame and the driven wheel frame. Bearing discs are provided between the detection component and the drive wheel frame and the driven wheel frame. The detection driving component is connected to the detection component and is used to drive the detection component to rotate in order to measure the circumferential sidewall of the pipe.

[0020] The beneficial effects of this utility model are as follows: The pipe wall thickness detection device proposed in this utility model is equipped with a support, a walking mechanism, an adjustment mechanism, and a detection module. The walking mechanism cooperates with the inner wall of the pipe to realize the axial movement of the device along the pipe. The adjustment mechanism is connected between the support and the walking mechanism to realize the adjustment of the radial distance between the walking mechanism and the support along the pipe to adapt to changes in the inner diameter of the pipe, thereby meeting the detection requirements for corrosion pits on the inner wall of complex pipes such as those with variable diameter structures. By setting the detection module at the center of the support, and aligning the axis of the detection module with the axis of the pipe, the detection module is always located at the center of the pipe. The detection module measures the radial distance between the side wall of the pipe and the axis, which can effectively measure the depth and shape of corrosion pits on the inner wall of the pipe, thereby detecting changes in the pipe wall thickness. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] In the attached diagram:

[0023] Figure 1 A schematic diagram of the pipe wall thickness detection device in a contracted state according to an embodiment of the present invention;

[0024] Figure 2 This is a side view of the pipe wall thickness detection device in a contracted state according to an embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram of the unfolded state of the pipe wall thickness detection device provided in one embodiment of the present invention;

[0026] Figure 4 This is a schematic diagram of the first state of the pipe wall thickness detection device provided in one embodiment of the present invention applied to pipe measurement;

[0027] Figure 5 This is a schematic diagram of the second state of the pipe wall thickness detection device provided in one embodiment of the present invention applied to pipe measurement.

[0028] The attached figures are labeled as follows:

[0029] 1. Bracket 1, drive wheel frame 101, driven wheel frame 102, walking mechanism 2, roller 201, mounting frame 202, walking drive component 203, adjustment mechanism 3, detection module 4, detection component 401, detection drive component 402, mounting base 5, bearing plate 6, pipe 7. Detailed Implementation

[0030] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0031] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0032] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0033] Please combine Figures 1 to 5 As shown, this utility model provides a pipe wall thickness detection device.

[0034] In an exemplary embodiment of this application, the pipe wall thickness detection device includes:

[0035] Bracket 1;

[0036] The traveling mechanism 2 is mounted on the support 1 and is used to cooperate with the inner wall of the pipe 7 to move the support 1 along the axial direction of the pipe 7.

[0037] Adjustment mechanism 3 is mounted on support 1. Adjustment mechanism 3 is connected to walking mechanism 2. Adjustment mechanism 3 is used to adjust the distance between walking mechanism 2 and support 1 radially along pipe 7.

[0038] The detection module 4 is set at the center of the support 1, and the axis of the detection module 4 coincides with the axis of the pipe 7. The detection module 4 is used to measure the radial distance between the side wall of the pipe 7 and the axis.

[0039] In this embodiment, a walking mechanism 2, an adjustment mechanism 3, and a detection module 4 are installed on a support 1. The walking mechanism 2 cooperates with the inner wall of the pipe 7 to enable the device to move axially along the pipe 7. The adjustment mechanism 3 is connected between the support 1 and the walking mechanism 2 to adjust the radial distance between the walking mechanism 2 and the support 1 along the pipe 7 to adapt to changes in the inner diameter of the pipe 7, thereby meeting the requirements for detecting corrosion pits on the inner wall of complex pipes such as those with variable diameter structures. By setting the detection module 4 at the center of the support 1, and aligning the axis of the detection module 4 with the axis of the pipe 7, the detection module 4 is always located at the center of the pipe 7. The detection module 4 measures the radial distance between the side wall of the pipe 7 and the axis, which can effectively measure the depth and shape of corrosion pits on the inner wall of the pipe 7, thereby detecting changes in the wall thickness of the pipe 7.

[0040] In an exemplary embodiment of this application, the bracket 1 includes a drive wheel frame 101 and a driven wheel frame 102, which are respectively disposed at both ends of the detection module 4 along the axial direction.

[0041] In this embodiment, the drive wheel frame 101 and the driven wheel frame 102 are used for the installation and support of the detection module 4. The main drive component of the walking mechanism 2, such as a walking motor, is installed on the drive wheel frame 101, and the auxiliary wheels that assist the drive wheel frame 101 in walking are installed on the driven wheel frame 102 to maintain the stability of the drive wheel frame 101 in walking along the axial direction of the pipe 7 and to maintain the positional stability of the detection module 4.

[0042] In an exemplary embodiment of this application, both the drive wheel frame 101 and the driven wheel frame 102 have at least two mounting seats 5 evenly distributed circumferentially.

[0043] In this embodiment, the mounting base 5 is used to install the adjustment mechanism 3, which is connected to the walking mechanism 2. By having at least two mounting bases 5 evenly distributed circumferentially on both the drive wheel frame 101 and the driven wheel frame 102, at least two rollers 201 on the drive wheel frame 101 and the driven wheel frame 102 are provided to contact the inner wall of the pipe 7, so as to maintain the contact stability between the device and the pipe 7 during the movement of the device, and effectively avoid the problem of the detection module 4 and the axis of the pipe 7 being offset when the device moves, which would lead to the deviation of the measurement results.

[0044] It is worth noting that in this embodiment, both the drive wheel frame 101 and the driven wheel frame 102 have three mounting seats 5 evenly distributed circumferentially.

[0045] In an exemplary embodiment of this application, the mounting base 5 on the drive wheel frame 101 and the mounting base 5 on the driven wheel frame 102 are arranged in a staggered manner along the circumference of the pipe 7.

[0046] In this embodiment, the mounting bases 5 of the drive wheel frame 101 and the driven wheel frame 102 are offset at a certain angle (e.g., 30°, 45°) around the pipe 7, causing the contact points of the two wheel frames to be asynchronous in the circumferential space. When the drive wheel on the drive wheel frame 101 encounters a protrusion in the pipe 7 at a certain angle, causing a sudden drop in angular velocity, the driven wheel on the driven wheel frame 102 has not yet reached that position due to the offset, and its angular velocity is temporarily unaffected. Furthermore, the offset setting of the mounting base 5 causes the impact forces of the two wheel frames to form a phase difference in the circumferential direction, and part of the impact forces cancel each other out, reducing the shaking amplitude of the device, thereby ensuring the axial stability of the detection module 4.

[0047] In an exemplary embodiment of this application, the adjustment mechanism 3 includes a telescopic joint and a telescopic component. The telescopic joint is installed in the mounting base 5, and the telescopic component is connected between the mounting base 5 and the telescopic joint. The telescopic component is used to expand or contract the telescopic joint.

[0048] In this embodiment, the telescopic joint is connected between the mounting base 5 and the wheel mounting bracket 202 of the traveling mechanism 2. The telescopic component is a spring, and the end of the telescopic component is connected to the telescopic joint mounting bracket 202. The telescopic joint is used to guide the telescopic component and prevent the traveling wheel from shifting during the telescopic component's extension and retraction. When the device is running in the pipe 7, the telescopic component is always in a compressed state, thereby ensuring that the traveling wheel can fit against the inner wall of the pipe 7 and ensuring that the traveling mechanism 2 can cooperate with the inner wall of the pipe 7 to drive the detection device to travel along the axis of the pipe 7.

[0049] In an exemplary embodiment of this application, the walking mechanism 2 includes a roller 201, a mounting frame 202, and a walking drive component 203. The mounting frame 202 is disposed on the telescopic joint, the roller 201 is rotatably disposed on the mounting frame 202, and the walking drive component 203 is connected to any one of the mounting frames 202 on the drive wheel frame 101 and is connected to the roller 201 rotatably disposed on the mounting frame 202.

[0050] In this embodiment, the mounting bracket 202 is connected to the end of the telescopic joint that is away from the mounting base 5 when it is in the unfolded state; the walking drive component 203 includes, but is not limited to, a motor. The stator of the walking drive component 203 is fixedly connected to any one of the mounting brackets 202 along the circumferential direction of the drive wheel frame 101, and is connected to the roller 201 on the mounting bracket 202. By driving the roller 201 to rotate, the roller 201 cooperates with the inner wall of the pipe 7, and the drive wheel frame 101 moves circumferentially in the pipe 7 through friction, thereby driving the detection module 4 to rotate along the circumferential direction of the pipe 7, thereby detecting the depth and shape of the corrosion pits on the circumferential sidewall of the pipe 7; the detection module 4 transmits power to the driven wheel frame 102, thereby driving the driven wheel frame 102 to rotate circumferentially along the inner wall of the pipe 7.

[0051] In an exemplary embodiment of this application, the mounting bracket 202 has an axial offset angle α with the radial plane of the pipe 7 where the expansion joint is located.

[0052] In this embodiment, by setting an axial offset angle α between the mounting bracket 202 and the radial plane of the pipe 7 where the expansion joint is located, there is an axial offset when the roller 201 contacts the inner wall of the pipe 7. When the roller 201 rotates, it drives the support 1 to rotate circumferentially along the pipe 7 and move axially along the pipe 7, forming a spiral forward motion, thereby realizing the detection of the depth and shape of corrosion pits on the inner wall of the pipe 7 at different axial positions.

[0053] In an exemplary embodiment of this application, the axial offset angle α is 5° to 10°.

[0054] In this embodiment, the axial offset angle α is not limited to being set to 5°, 7°, 9°, etc., so that the axial offset angle is small, reducing the axial travel speed of the device along the pipe 7, and enabling the detection module 4 to more comprehensively detect the depth and shape of the corrosion pits on the inner wall of the pipe 7.

[0055] In an exemplary embodiment of this application, an angle adjustment component is provided between the mounting bracket 202 and the telescopic joint, and the angle adjustment component is used to adjust the axial offset angle α.

[0056] In this embodiment, the angle adjustment component includes a ball head disposed on the mounting bracket 202. Multiple through holes are provided circumferentially on a plane perpendicular to the mounting bracket 202 on the ball head. The angular deviation between two adjacent through holes and the center of the ball head is, but is not limited to, set to 1° or 2°. A pin hole is provided on the telescopic joint. A pin passes through the pin hole and through holes to connect the ball head to the telescopic joint. By removing the pin, rotating the mounting bracket 202 to align the through holes at different positions with the pin hole, and then inserting the pin, the angle adjustment and angle fixation of the mounting bracket 202 are achieved.

[0057] In an exemplary embodiment of this application, the detection module 4 includes a detection component 401 and a detection drive component 402. The detection drive component 402 is disposed on the bracket 1. The detection component 401 is connected between the drive wheel frame 101 and the driven wheel frame 102. Bearing discs 6 are provided between the detection component 401 and both the drive wheel frame 101 and the driven wheel frame 102. The detection drive component 402 is connected to the detection component 401 and is used to drive the detection component 401 to rotate in order to measure the circumferential sidewall of the pipe 7.

[0058] In this embodiment, both the drive wheel frame 101 and the driven wheel frame 102 are equipped with detection drive components 402, which are connected to the detection component 401. Since bearing discs 6 are provided between the detection component 401 and the drive wheel frame 101 and the driven wheel frame 102, and the rotation speed of the detection drive component 402 is greater than the travel speed of the support 1, the rotation process of the detection drive component 402 driving the detection component 401 to rotate does not interfere with the rotation process of the support 1. Furthermore, the rotation speed of the detection drive component 402 is greater than the travel speed of the support 1, which allows the detection component 401 to more comprehensively detect the depth and shape of the corrosion pits on the circumferential inner wall of the pipe 7.

[0059] It is worth noting that the detection component 401 consists of a laser generator and a laser sensor. After the laser generator emits a laser that hits the wall of the pipe 7, the laser sensor receives the laser signal and calculates the distance by multiplying the speed of light by the time, thereby realizing the detection of the depth and shape of the corrosion pits on the inner wall of the pipe 7.

[0060] Working principle: The telescopic mechanism is inserted into the pipe 7 in a retracted state. When the telescopic mechanism unfolds, the traveling mechanism 2 contacts the inner wall of the pipe 7. The traveling drive component 203 drives the roller 201 to rotate. The roller 201 cooperates with the inner wall of the pipe 7 to drive the drive wheel frame 101 to rotate. The power of the drive wheel frame 101 is transmitted to the driven wheel frame 102 through the detection module 4, causing the driven wheel frame 102 to rotate. Since the mounting seat 5 on the drive wheel frame 101 and the mounting seat 5 on the driven wheel frame 102 are misaligned, the stability of the device operation is effectively improved, and the detection module 4 is prevented from deviating from the axis of the pipe 7 during the device's axial movement along the pipe 7, thereby avoiding measurement deviation. The detection drive component 402 drives the detection component 401 to rotate to detect the circumferential inner wall of the pipe 7. When the device travels to the part where the inner diameter of the pipe 7 changes, the telescopic component (i.e., spring) extends or retracts to ensure that the roller 201 can cooperate with the inner wall of the pipe 7 and to keep the detection module 4 always on the axis of the pipe 7, ensuring measurement accuracy. This application uses a support 1 to mount a traveling mechanism 2, an adjustment mechanism 3, and a detection module 4. The traveling mechanism 2 works in conjunction with the inner wall of the pipe 7 to allow the device to move axially along the pipe 7. The adjustment mechanism 3 is connected between the support 1 and the traveling mechanism 2 to adjust the radial distance between the traveling mechanism 2 and the support 1 along the pipe 7, adapting to changes in the inner diameter of the pipe 7, thus meeting the requirements for detecting corrosion pits on the inner wall of complex pipes such as those with variable diameter structures. By setting the detection module 4 at the center of the support 1, and with the axis of the detection module 4 coinciding with the axis of the pipe 7, the detection module 4 is always located at the center of the pipe 7. The detection module 4 measures the radial distance from the side wall of the pipe 7 to the axis, which can effectively measure the depth and shape of corrosion pits on the inner wall of the pipe 7, thereby detecting changes in the wall thickness of the pipe 7.

[0061] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A pipe wall thickness detection device, characterized in that, include: support; A traveling mechanism, mounted on the support, is used to engage with the inner wall of the pipe, allowing the support to move axially along the pipe. An adjustment mechanism is provided on the support, and the adjustment mechanism is connected to the traveling mechanism. The adjustment mechanism is used to adjust the distance between the traveling mechanism and the support along the radial direction of the pipeline. A detection module is positioned at the center of the support, with the axis of the detection module coinciding with the axis of the pipe. The detection module is used to measure the radial distance between the sidewall of the pipe and the axis.

2. The pipe wall thickness detection device according to claim 1, characterized in that: The support includes a drive wheel frame and a driven wheel frame, which are respectively disposed at both ends of the detection module along the axial direction.

3. The pipe wall thickness detection device according to claim 2, characterized in that: Both the drive wheel frame and the driven wheel frame have at least two mounting seats evenly distributed circumferentially.

4. The pipe wall thickness detection device according to claim 3, characterized in that: The mounting base on the drive wheel frame and the mounting base on the driven wheel frame are arranged in a staggered manner along the circumference of the pipeline.

5. The pipe wall thickness detection device according to claim 3, characterized in that: The adjustment mechanism includes a telescopic joint and a telescopic component. The telescopic joint is installed in the mounting base, and the telescopic component is connected between the mounting base and the telescopic joint. The telescopic component is used to expand or contract the telescopic joint.

6. The pipe wall thickness detection device according to claim 5, characterized in that: The walking mechanism includes rollers, mounting brackets, and a walking drive component. The mounting brackets are mounted on the telescopic joint, and the rollers are rotatably mounted on the mounting brackets. The walking drive component is connected to any one of the mounting brackets on the drive wheel frame and is also connected to a rotatably mounted roller on that mounting bracket.

7. The pipe wall thickness detection device according to claim 6, characterized in that: The mounting bracket has an axial offset angle α with respect to the radial plane of the pipe on which the expansion joint is located.

8. The pipe wall thickness detection device according to claim 7, characterized in that: The axial offset angle α is 5°~10°.

9. The pipe wall thickness detection device according to claim 7, characterized in that: An angle adjustment component is provided between the mounting bracket and the expansion joint, and the angle adjustment component is used to adjust the axial offset angle α.

10. The pipe wall thickness detection device according to claim 2, characterized in that: The detection module includes a detection component and a detection drive component. The detection drive component is mounted on the bracket and connected between the drive wheel frame and the driven wheel frame. Bearing discs are provided between the detection component and both the drive wheel frame and the driven wheel frame. The detection drive component is connected to the detection component and is used to drive the detection component to rotate in order to measure the circumferential sidewall of the pipe.

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