A thickness measuring machine for the inner anti-corrosion coating of pipelines
By designing a pipe internal anti-corrosion coating thickness measuring machine with an adjustable support plate and a detachable threaded rod, the applicability and portability issues of existing equipment have been solved, achieving high-precision coating thickness measurement and convenient transportation and storage.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YUNNAN SHANGFA CONSTR ENG QUALITY INSPECTION CO LTD
- Filing Date
- 2025-07-10
- Publication Date
- 2026-06-30
AI Technical Summary
Existing methods and equipment for measuring the internal corrosion protection coating of pipelines suffer from problems such as high destructiveness, limited applicability, low measurement accuracy, and inconvenience, especially in terms of adaptability to different pipe diameters and transportation and storage.
A thickness measuring machine for the anti-corrosion coating inside pipes was designed. It adopts an adjustable support plate and a detachable threaded rod structure, combined with an ultrasonic thickness gauge, which can adapt to the measurement needs of different pipe diameters. The telescopic design makes it easy to carry and store. It uses ultrasonic thickness measurement technology to accurately measure the coating thickness.
It enables high-precision thickness measurement of pipes of different diameters, reduces equipment space occupation, lowers transportation and storage costs, and improves the convenience and accuracy of measurement.
Smart Images
Figure CN224435344U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of pipeline inspection technology, and in particular to a thickness measuring machine for the anti-corrosion coating of pipeline. Background Technology
[0002] Pipelines are widely used in various industrial production and infrastructure construction as important carriers for transporting liquids, gases and other media. In order to extend the service life of pipelines and reduce the corrosion of the pipeline inner wall by the media, an anti-corrosion layer is usually coated on the inner wall of the pipeline. The thickness of the anti-corrosion layer is directly related to its protective performance and service life. If the anti-corrosion layer is too thin, it may not be able to effectively resist the erosion of the media, leading to problems such as premature corrosion and leakage of the pipeline. If the anti-corrosion layer is too thick, it will cause material waste and increase costs. Therefore, it is of great significance to accurately measure the coating thickness of the anti-corrosion layer inside the pipeline.
[0003] Existing methods and equipment for measuring the thickness of anti-corrosion coatings inside pipelines have many shortcomings. Traditional destructive measurement methods, such as measuring with a microscope after cutting the pipe, although highly accurate, can cause irreversible damage to the pipeline and affect its normal use. This method is extremely costly and impractical, especially for pipelines that have already been laid.
[0004] In terms of non-destructive measurement technology, some commonly used thickness gauges, such as magnetic thickness gauges and ultrasonic thickness gauges, also face challenges in practical applications. Magnetic thickness gauges can only be used to measure the coating thickness on ferromagnetic substrates, which limits their applicability. Although ultrasonic thickness gauges are theoretically suitable for measuring coatings of various materials, they are easily affected by the surface conditions of the inner wall of the pipe, such as roughness, oil stains, and pipe curvature, making it difficult to guarantee measurement accuracy. Moreover, most existing thickness measuring equipment has a fixed structure, which is difficult to adjust in a convenient way to meet the measurement requirements of various pipe diameters. The overall structure of the equipment cannot be disassembled or folded, which results in occupying a large space during transportation and storage, increasing the cost of use and management difficulty.
[0005] To address these shortcomings, we have proposed a pipe internal anti-corrosion coating thickness measuring machine. Utility Model Content
[0006] The purpose of this invention is to provide a thickness measuring machine for the anti-corrosion coating of pipelines, in order to overcome the shortcomings of existing technologies.
[0007] To achieve the above objectives, this utility model adopts the following technical solution: a thickness measuring machine for the anti-corrosion coating inside a pipeline, comprising a support shell, a reversible motor, a reversible threaded screw, an adjusting rod, a hinge, a support plate, an electric wheel, a guide groove, a drive motor, a threaded cylinder, a threaded rod, a thickness gauge, a support rod, a probe, and threaded blocks. The reversible motor is installed inside the support shell, and its output shaft is connected to the reversible threaded screw. Threaded blocks are symmetrically arranged on the reversible threaded screw. One end of the adjusting rod is hinged to the threaded block, and the other end is hinged to the support plate via a hinge. An electric wheel is provided on the surface of the support plate. The adjusting rod is slidably connected to the guide groove, which is located on the surface of the pipeline. The drive motor is mounted on the support shell, and its output shaft is connected to the threaded cylinder. The threaded rod is threadedly connected to the threaded cylinder. The thickness gauge is mounted on one end of the threaded rod, and one end of the support rod is connected to the thickness gauge. A probe is provided at the other end of the support rod.
[0008] Preferably, the support plate has an arc-shaped structure.
[0009] Preferably, the thickness gauge is an ultrasonic thickness gauge.
[0010] Preferably, the threaded connection between the threaded rod and the threaded cylinder uses fine thread.
[0011] Preferably, the positive and negative threaded screws are arranged parallel to the support shell.
[0012] Preferably, the support plate is used in conjunction with the inner wall of the pipe.
[0013] Compared with the prior art, the beneficial effects of this utility model are:
[0014] 1. By setting an adjustable support plate, this utility model can be used for thickness measurement of pipes with different diameters, making it more versatile. At the same time, the telescopic design is beneficial for carrying, transporting and storing pipes, achieving two goals at once.
[0015] 2. By setting a detachable threaded rod in this utility model, the threaded rod can be separated from the threaded cylinder, which facilitates the disassembly and assembly of the thickness gauge, makes it more convenient to carry, and reduces the space occupied. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0017] Figure 1This is a schematic diagram of the structure of a pipe internal anti-corrosion coating thickness measuring machine proposed in this utility model;
[0018] Figure 2 for Figure 1 Enlarged diagram of A in the middle;
[0019] Figure 3 for Figure 1 External structure diagram;
[0020] Figure 4 This is a three-dimensional view of the supporting shell.
[0021] Legend:
[0022] 1. Support shell; 2. Forward and reverse motor; 3. Forward and reverse threaded screw; 4. Adjusting rod; 5. Hinge; 6. Support plate; 7. Electric wheel; 8. Guide groove; 9. Drive motor; 10. Threaded cylinder; 11. Threaded rod; 12. Thickness gauge; 13. Support rod; 14. Probe; 15. Threaded block. Detailed Implementation
[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0024] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance; furthermore, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "joined" should be interpreted broadly, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.
[0025] Please refer to Figure 1-4A thickness measuring machine for an internal anti-corrosion coating of a pipeline includes a support shell 1, a reversible motor 2, a screw rod 3, an adjusting rod 4, a hinge 5, a support plate 6, an electric wheel 7, a guide groove 8, a drive motor 9, a threaded cylinder 10, a threaded rod 11, a thickness gauge 12, a support rod 13, a probe 14, and threaded blocks 15. The reversible motor 2 is installed inside the support shell 1, and the output shaft of the reversible motor 2 is connected to the screw rod 3. Threaded blocks 15 are symmetrically arranged on the screw rod 3. One end of the adjusting rod 4 is connected to the threaded cylinder. Block 15 is hinged, and the other end of the adjusting rod 4 is hinged to the support plate 6 via hinge 5. The surface of the support plate 6 is provided with an electric wheel 7. The adjusting rod 4 is slidably connected to the guide groove 8, which is located on the surface of the pipe. The drive motor 9 is mounted on the support shell 1, and the output shaft of the drive motor 9 is connected to the threaded cylinder 10. The threaded rod 11 is threadedly connected to the threaded cylinder 10. The thickness gauge 12 is mounted on one end of the threaded rod 11, and one end of the support rod 13 is connected to the thickness gauge 12. The other end of the support rod 13 is provided with a probe 14.
[0026] When measuring the thickness of the anti-corrosion coating inside a pipe, the thickness gauge 12 is first placed at the port of the pipe to be measured. The reversible motor 2 is then started, which drives the threaded screw 3 to rotate. Because threaded blocks 15 are symmetrically arranged on the threaded screw 3, and due to its special thread design, the threaded blocks 15 move relative to or opposite to each other along the screw axis. The adjusting rod 4, hinged to the threaded blocks 15, is connected at one end to the threaded blocks 15 and at the other end to the arc-shaped support plate 6 via a hinge 5. As the threaded blocks 15 move, the adjusting rod 4 pushes or pulls the support plate 6, causing it to expand or contract via the hinge 5. If the pipe diameter is large, the reversible motor 2 drives the threaded screw 3 to rotate, causing the threaded blocks 15 to move opposite to each other, and the adjusting rod 4 pushes the support plate 6 to further expand. With a smaller diameter, the forward and reverse motor 2 rotates in opposite directions, causing the threaded block 15 to move relative to it. The adjusting rod 4 pulls the support plate 6 to retract until the electric wheel 7 on the support plate 6 is in close contact with the inner wall of the pipe, thus enabling the thickness gauge 12 to adapt to pipes of different diameters. During the adjustment process, the electric wheel 7 on the support plate 6 assists in adhering to the inner wall of the pipe. During subsequent measurements, the electric wheel 7 will roll on the inner wall of the pipe, ensuring that the thickness gauge 12 moves stably and smoothly inside the pipe. After the support plate 6 is adjusted to the appropriate position and stably adheres to the inner wall of the pipe, the drive motor 9 is started through the external control switch. The drive motor 9 drives the threaded cylinder 10 to rotate. Because the threaded rod 11 is threadedly connected to the threaded cylinder 10, the rotation of the threaded cylinder 10 will cause the threaded rod 11 to move axially. The thickness gauge 12 and probe 14 move accordingly. One end of the support rod 13 is connected to the support shell 1, and the other end is connected to the thickness gauge 12, ensuring the stability of the thickness gauge 12 during movement and preventing shaking or deviation. As the drive motor 9 continues to run, the threaded rod 11 pushes the thickness gauge 12 and probe 14 closer and closer to the inner wall of the pipe until the probe 14 contacts the anti-corrosion layer of the inner wall of the pipe. At this time, the thickness gauge 12, which uses ultrasonic thickness measurement technology, starts to work. It emits ultrasonic signals to the anti-corrosion layer. Since ultrasonic waves propagate at different speeds in different media, the anti-corrosion layer, and the pipe substrate, they will be reflected when they encounter the interface between the anti-corrosion layer and the pipe substrate. The thickness gauge 12 accurately measures the time from the emission of the ultrasonic wave to the reception of the reflected wave. Combined with the known propagation speed of ultrasonic waves in the anti-corrosion layer, it calculates the thickness. The thickness gauge measures the coating thickness of the anti-corrosion layer and transmits the measurement data to the control panel in real time for easy reading and recording by the operator. During the measurement process, the operator can flexibly control the rotation direction and angle of the drive motor 9 via the control switch, causing the threaded rod 11 to drive the thickness gauge 12 and probe 14 to measure at multiple points in different axial positions and circumferential directions of the pipeline. This allows for a comprehensive and accurate understanding of the distribution of the anti-corrosion coating thickness inside the pipeline. After completing all measurements, the operator can reverse the direction of the forward and reverse motor 2 via the control switch, causing the forward and reverse threaded screws 3 to rotate in the opposite direction, the threaded block 15 to move in the opposite direction, and the adjusting rod 4 to pull the support plate 6 to retract. The thickness gauge can then be removed from the pipeline. If maintenance, repair, or replacement of parts is required for the thickness gauge 12, further steps can be taken.The threaded rod 11 can be unscrewed from the threaded cylinder 10 to easily disassemble the thickness gauge 12. After maintenance, it can be reinstalled to restore the thickness gauge 12 to a usable state.
[0027] In this implementation plan: the support plate 6 has an arc-shaped structure.
[0028] Specifically, this allows the electric wheel 7 on it to fit snugly against the inner wall of the pipe being tested, ensuring stability and preventing it from shaking.
[0029] In this implementation plan: the thickness gauge 12 is an ultrasonic thickness gauge.
[0030] Specifically, the following can be used: TIME2500, PD-T200, or Pocket-L from NIKKOR. These are mature thickness gauges, and their working principles and structures are existing technologies. This article only uses them without making any improvements.
[0031] In this embodiment, the threaded connection between the threaded rod 11 and the threaded cylinder 10 adopts a fine thread.
[0032] Specifically, this ensures that the two can work together perfectly, stably and reliably.
[0033] In this implementation scheme: the positive and negative threaded screws 3 are arranged parallel to the support shell 1.
[0034] Specifically, this allows the positive and negative threaded screws 3 to be set along the length of the support shell 1.
[0035] In this implementation plan: the support plate 6 is used in conjunction with the inner wall of the pipe.
[0036] Specifically, this ensures that the support plate 6 can fit snugly against the inner wall of the pipe.
[0037] Working Principle: When measuring the thickness of the anti-corrosion coating inside a pipe, the thickness gauge 12 is first placed at the port of the pipe to be measured. The forward and reverse motor 2 is started, which drives the forward and reverse threaded screw 3 to rotate. Due to the symmetrical threaded blocks 15 on the forward and reverse threaded screw 3 and its special thread design, the threaded blocks 15 will move relative to or opposite to each other along the screw axis. The adjusting rod 4, which is hinged to the threaded blocks 15, is connected to the threaded blocks 15 at one end and to the arc-shaped support plate 6 at the other end through the hinge 5. As the threaded blocks 15 move, the adjusting rod 4 will push or pull the support plate 6, causing it to expand or contract through the hinge 5. If the pipe diameter is large, the forward and reverse motor 2 drives the forward and reverse threaded screw 3 to rotate, causing the threaded blocks 15 to move opposite to each other, and the adjusting rod 4 pushes the support plate 6 to further expand. If the pipe diameter is small, the forward and reverse motor 2 rotates in the opposite direction, the threaded block 15 moves relative to the pipe, and the adjusting rod 4 pulls the support plate 6 to retract until the electric wheel 7 on the support plate 6 is in close contact with the inner wall of the pipe, thus enabling the thickness gauge 12 to adapt to pipes of different diameters. The electric wheel 7 on the support plate 6 assists in adhering to the inner wall of the pipe during the adjustment process. During subsequent measurements, the electric wheel 7 will roll on the inner wall of the pipe to ensure that the thickness gauge 12 moves stably and smoothly inside the pipe. After the support plate 6 is adjusted to the appropriate position and stably adheres to the inner wall of the pipe, the drive motor 9 is started through the external control switch. The drive motor 9 drives the threaded cylinder 10 to rotate. Because the threaded rod 11 is threadedly connected to the threaded cylinder 10, the rotation of the threaded cylinder 10 will cause the threaded rod 11 to move axially. The thickness gauge 12 and probe 14 at one end move accordingly. One end of the support rod 13 is connected to the support shell 1, and the other end is connected to the thickness gauge 12, ensuring the stability of the thickness gauge 12 during movement and preventing shaking or deviation. As the drive motor 9 continues to run, the threaded rod 11 pushes the thickness gauge 12 and probe 14 closer and closer to the inner wall of the pipe until the probe 14 contacts the anti-corrosion layer of the inner wall of the pipe. At this time, the thickness gauge 12, which uses ultrasonic thickness measurement technology, starts to work. It emits ultrasonic signals to the anti-corrosion layer. Since ultrasonic waves propagate at different speeds in different media, the anti-corrosion layer, and the pipe substrate, they will be reflected when they encounter the interface between the anti-corrosion layer and the pipe substrate. The thickness gauge 12 accurately measures the time from the emission of the ultrasonic wave to the reception of the reflected wave. Combined with the known propagation speed of ultrasonic waves in the anti-corrosion layer, it calculates... The thickness gauge measures the thickness of the anti-corrosion coating and transmits the measurement data to the control panel in real time for easy reading and recording by the operator. During the measurement process, the operator can flexibly control the rotation direction and angle of the drive motor 9 via the control switch, causing the threaded rod 11 to drive the thickness gauge 12 and probe 14 to measure at multiple points in different axial positions and circumferential directions of the pipeline. This allows for a comprehensive and accurate understanding of the distribution of the anti-corrosion coating thickness inside the pipeline. After completing all measurements, the operator can reverse the direction of the forward and reverse motor 2 via the control switch, causing the forward and reverse threaded screws 3 to rotate in the opposite direction, the threaded block 15 to move in the opposite direction, and the adjusting rod 4 to pull the support plate 6 to retract. The thickness gauge can then be removed from the pipeline. If maintenance, repair, or replacement of parts is required for the thickness gauge 12...The threaded rod 11 can be unscrewed from the threaded cylinder 10 to easily disassemble the thickness gauge 12. After maintenance, it can be reinstalled to restore the thickness gauge 12 to a usable state.
[0038] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A thickness measuring machine for an internal anti-corrosion coating of a pipeline, comprising a support shell (1), a forward and reverse motor (2), a forward and reverse threaded screw (3), an adjusting rod (4), a hinge (5), a support plate (6), an electric wheel (7), a guide groove (8), a drive motor (9), a threaded cylinder (10), a threaded rod (11), a thickness gauge (12), a support rod (13), a probe (14), and a threaded block (15), characterized in that, The support shell (1) is equipped with a forward and reverse motor (2), and the output shaft of the forward and reverse motor (2) is connected to the forward and reverse threaded screw (3). The forward and reverse threaded screw (3) is symmetrically provided with threaded blocks (15). One end of the adjusting rod (4) is hinged to the threaded block (15), and the other end of the adjusting rod (4) is hinged to the support plate (6) through the hinge (5). The surface of the support plate (6) is provided with an electric wheel (7). The adjusting rod (4) is slidably connected to the guide groove (8). The guide groove (8) is provided on the surface of the pipe. The drive motor (9) is installed on the support shell (1). The output shaft of the drive motor (9) is connected to the threaded cylinder (10). The threaded rod (11) is threadedly connected to the threaded cylinder (10). The thickness gauge (12) is installed at one end of the threaded rod (11). One end of the support rod (13) is connected to the thickness gauge (12). The other end of the support rod (13) is provided with a probe (14).
2. The pipe internal anti-corrosion coating thickness measuring machine according to claim 1, characterized in that, The support plate (6) has an arc-shaped structure.
3. The pipe internal anti-corrosion coating thickness measuring machine according to claim 1, characterized in that, The thickness gauge (12) is an ultrasonic thickness gauge.
4. The pipe internal anti-corrosion coating thickness measuring machine according to claim 1, characterized in that, The threaded connection between the threaded rod (11) and the threaded cylinder (10) is made of fine thread.
5. A pipe internal anti-corrosion coating thickness measuring machine according to claim 1, characterized in that, The positive and negative threaded screws (3) are arranged parallel to the support shell (1).
6. A pipe internal anti-corrosion coating thickness measuring machine according to claim 1, characterized in that, The support plate (6) is used in conjunction with the inner wall of the pipe.