Ultrasonic detection test device for coal mine pipeline
By designing an ultrasonic testing device for coal mine pipelines, high-precision and safe pipeline testing was achieved, solving the problems of low accuracy and poor safety of traditional testing methods, improving testing efficiency and reducing operational risks.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HENAN CHINA CARBON & PLASTIC PROD CO LTD
- Filing Date
- 2025-06-13
- Publication Date
- 2026-04-24
AI Technical Summary
Existing methods for inspecting coal mine pipelines suffer from low accuracy, subjective results, poor safety, inability to effectively detect internal defects, and high risks to operators in complex environments.
An ultrasonic testing device for coal mine pipelines was designed. It adopts a design that tightly fits the fixed ring and the test terminal, and combines rotation and axial movement to detect pipeline defects using ultrasonic signals. The operator can control the testing process from a safe distance.
It improves detection accuracy and efficiency, significantly shortens the detection cycle, and reduces the safety risks for operators, making it suitable for pipeline inspection in high-risk areas of coal mines.
Smart Images
Figure CN224162449U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of coal mine safety testing technology, specifically to an ultrasonic testing device for coal mine pipelines. Background Technology
[0002] In coal mine production, pipelines serve as critical infrastructure for transporting fluids (such as gas, water, and air), and their safety is directly related to the safe production of the coal mine. However, due to the complex underground environment of coal mines, pipelines are constantly affected by factors such as high humidity, high dust, corrosive gases, and ground pressure, which can easily lead to defects such as cracks, corrosion, and thinning of the walls. If these defects are not detected and addressed in time, they may cause major safety accidents such as gas leaks and water inrushes.
[0003] Traditional methods for inspecting coal mine pipelines mainly include manual visual inspection and simple tapping inspection. These methods have significant drawbacks: their inspection accuracy is low; manual visual inspection can only detect obvious defects on the pipeline surface and cannot detect internal defects or micro-cracks; tapping inspection relies on the operator's experience and judgment, resulting in highly subjective results, large errors, and difficulty in accurately assessing the actual condition of the pipeline; it also has poor safety, as the underground environment of coal mines poses safety hazards such as gas explosions; manual inspection requires operators to be in close contact with the pipeline, which is risky in complex environments and cannot effectively inspect pipelines in high-risk areas. Utility Model Content
[0004] This invention provides an ultrasonic testing device for coal mine pipelines, which has the advantages of reducing safety risks for operators, reducing signal scattering and attenuation, improving the accuracy of test results, and increasing test efficiency.
[0005] This utility model provides the following technical solution: an ultrasonic testing device for coal mine pipelines, including a fixed support, a base fixedly connected to the bottom end of the fixed support, a plurality of extension plates fixedly connected to the outer wall of the base, and a support foot penetrating the top end of the plurality of extension plates away from the base.
[0006] A detector is fixedly connected to the top of the fixed support, a connecting groove is fixedly connected to one side of the outer wall of the detector, and multiple connecting terminals are fixedly connected to the bottom of the connecting groove. Each of the multiple connecting terminals has an insertion port at its top.
[0007] As a preferred embodiment of this utility model, each of the multiple sockets is fixedly connected to a transmission line at its top end, and a detection terminal is fixedly connected to the end of each transmission line away from the socket.
[0008] As a preferred embodiment of this utility model, a fixing ring is fixedly connected to one end of the plurality of detection terminals away from the transmission line, and a plurality of rotating shafts penetrate the outer wall of the fixing ring.
[0009] As a preferred embodiment of this utility model, the inner walls of the plurality of rotating shafts are penetrated by a through shaft, and the outer walls of the through shafts are penetrated by rotating sleeves at both ends. A sealing plate is fixedly connected to one end of the plurality of rotating sleeves away from the through shaft.
[0010] As a preferred embodiment of this utility model, the outer walls of the plurality of rotating sleeves are all fixedly connected with a plurality of textile layers, and the plurality of textile layers are all made of polyester fibers.
[0011] As a preferred technical solution of this utility model, a fixing port is fixedly connected to one side of the multiple textile layers near the bottom, and two connecting bolts pass through one side of the two fixing ports.
[0012] As a preferred embodiment of this utility model, the plurality of textile layers correspond to the fixing ring, and the plurality of textile layers are located on both sides of the fixing ring.
[0013] Compared with the prior art, this utility model provides an ultrasonic testing device for coal mine pipelines, which has the following beneficial effects:
[0014] 1. The ultrasonic testing device for coal mine pipelines ensures that the ultrasonic signal is perpendicularly incident on the pipeline surface through the tight fit design of the fixing ring and the testing terminal.
[0015] 2. This ultrasonic testing device for coal mine pipelines, through the rotation of the fixed ring and the axial movement of the device, can quickly detect different locations on the pipeline. The detection time for a single detection section is only 1-2 minutes, which is 5-8 times more efficient than traditional manual detection, significantly shortening the detection cycle. Moreover, during the detection process, the operator does not need to be in close contact with the pipeline and can control the detection process through the detector from a safe distance. It is especially suitable for pipeline detection in high-risk areas of underground coal mines, reducing the safety risks for operators. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 2 This is a multi-angle three-dimensional structural diagram of the present invention;
[0018] Figure 3 This is a schematic diagram of the fixed ring connection structure of this utility model;
[0019] Figure 4 This is a schematic diagram of the fixed port connection structure of this utility model.
[0020] In the diagram: 1. Fixed support; 2. Base; 3. Extension plate; 4. Support leg; 5. Detector; 6. Connecting cable tray; 7. Connecting terminal; 8. Socket; 9. Transmission line; 10. Detection terminal; 11. Fixing ring; 12. Rotating shaft; 13. Through shaft; 14. Rotating sleeve; 15. Sealing plate; 16. Textile layer; 17. Fixing port; 18. Connecting bolt. Detailed Implementation
[0021] 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.
[0022] Please see Figures 1-4 This utility model discloses an ultrasonic testing device for coal mine pipelines, including a fixed support 1, a base 2 fixedly connected to the bottom end of the fixed support 1, a plurality of extension plates 3 fixedly connected to the outer wall of the base 2, and a support foot 4 passing through the top end of the plurality of extension plates 3 away from the base 2.
[0023] A detector 5 is fixedly connected to the top of the fixed support 1. A connecting groove 6 is fixedly connected to one side of the outer wall of the detector 5. Multiple connecting terminals 7 are fixedly connected to the bottom of the connecting groove 6. Each of the multiple connecting terminals 7 has an insertion port 8 at its top.
[0024] Specifically, the fixed support 1, made of high-strength aluminum alloy, is vertically fixed to the top of the base 2, providing a stable installation platform for the detector 5. Multiple extension plates 3, symmetrically distributed and fixed to the outer wall of the base 2, have through holes on their surfaces that engage with the support legs 4. The height of the support legs 4 can be adjusted by bolts, allowing the device to adapt to different levels of flatness in ground or pipeline installation environments, ensuring stability during testing. Rubber anti-slip pads can be added to the bottom of the support legs 4 to further enhance their anti-slip performance. The length of the support legs 4 extending beyond the extension plates 3 can be adjusted by tightening the nuts on the support legs 4. The overall height of the device can be precisely adjusted to meet the inspection requirements of pipelines at different heights. This avoids the detection terminal 10 failing to accurately contact the pipeline surface due to an unsuitable device height. The detector 5 has a built-in ultrasonic transmitting and receiving module, signal processing circuit, and data storage unit. It can generate high-frequency ultrasonic signals and receive reflected echoes. By analyzing the echo signals, pipeline defects can be detected and located. The connecting groove 6 on the outer wall of the detector 5 is made of insulating material and integrates multiple sets of signal transmission lines 9 inside. These lines are used to connect the connecting terminal 7 to the internal circuit of the detector 5, ensuring the stability and anti-interference capability of signal transmission.
[0025] In this embodiment, a transmission line 9 is fixedly connected to the top of each of the multiple sockets 8, and a detection terminal 10 is fixedly connected to the end of the multiple transmission lines 9 away from the sockets 8.
[0026] Specifically, the connection terminal 7 is detachably connected to the transmission line 9 via the socket 8, facilitating the replacement and maintenance of the detection terminal 10. The transmission line 9 uses a shielded cable, which can effectively reduce the influence of external electromagnetic interference on the ultrasonic signal. The detection terminal 10 is an ultrasonic transducer that can convert electrical signals into ultrasonic signals and transmit them into the pipe, while simultaneously receiving reflected echoes and converting them back into electrical signals for transmission to the detector 5 for processing.
[0027] In this embodiment, a fixing ring 11 is fixedly connected to one end of a plurality of detection terminals 10 away from the transmission line 9, and a plurality of rotating shafts 12 pass through the outer wall of the fixing ring 11.
[0028] Specifically, the fixing ring 11 is a circular ring structure, with its inner diameter matching the outer diameter of the pipe to be tested. It is made of elastic material and has a certain deformation capacity, allowing it to fit tightly against the outer wall of the pipe. Multiple rotating shafts 12 evenly distributed on the outer wall of the fixing ring 11 are rotatably connected to the fixing ring 11 through bearings, ensuring that the through shaft 13 can rotate flexibly.
[0029] In this embodiment, the inner walls of multiple rotating shafts 12 are penetrated by through shafts 13, and the outer walls of the through shafts 13 are penetrated by rotating sleeves 14 at both ends. The ends of the multiple rotating sleeves 14 away from the through shafts 13 are fixedly connected to sealing plates 15.
[0030] Specifically, the through shaft 13 passes through the inner wall of the rotating shaft 12, and the rotating sleeves 14 at both ends can slide axially along the through shaft 13. The position of the rotating sleeves 14 can be fixed by tightening the nuts at the ends. The end of the rotating sleeve 14 away from the through shaft 13 is fixedly connected to the sealing plate 15, which is used to seal both ends of the fixing ring 11 to prevent the detection terminal 10 from falling off during the detection process, and at the same time to provide installation support for the textile layer 16.
[0031] In this embodiment, multiple textile layers 16 are fixedly connected to the outer walls of multiple rotating sleeves 14, and the multiple textile layers 16 are all made of polyester fibers.
[0032] Specifically, the multiple textile layers 16 fixedly connected to the outer wall of the rotating sleeve 14 are woven from polyester fiber material, which has the characteristics of wear resistance, corrosion resistance and good flexibility. The textile layers 16 cover the area where the fixing ring 11 contacts the pipe. Through its flexibility, it adapts to the irregular shape of the pipe surface, ensuring that the detection terminal 10 fits tightly with the pipe surface and improving the ultrasonic coupling effect.
[0033] In this embodiment, a fixing port 17 is fixedly connected to one side of the multiple textile layers 16 near the bottom, and two connecting bolts 18 pass through one side of the two fixing ports 17.
[0034] Specifically, the fixing port 17 provided on one side of the bottom textile layer 16 can be fixed to the pipe by connecting bolts 18 to form an annular surround, preventing the device from shifting during the detection process. For pipes of different diameters, the opening angle of the fixing ring 11 can be changed by adjusting the position of the rotating sleeve 14 on the through shaft 13, and then the textile layer 16 can be fixed by connecting bolts 18 to achieve adaptive detection of pipes of different diameters.
[0035] In this embodiment, multiple textile layers 16 correspond to the fixing ring 11, and the multiple textile layers 16 are located on both sides of the fixing ring 11.
[0036] Specifically, by setting the textile layers 16 to correspond to the fixing rings 11, the fixing rings 11 are more securely fixed, making inspection easier.
[0037] The working principle and usage process of this utility model are as follows: When using the device, move it to the vicinity of the coal mine pipeline to be inspected and select an inspection area with a flat and unobstructed pipeline surface. By adjusting the height of the support leg 4, the fixed support 1 is made horizontal, ensuring that the detector 5 is perpendicular to the pipe axis. A suitable detection terminal 10 is selected according to the pipe diameter and securely connected to the connector 8 of the connection terminal 7 via the transmission line 9. The fixing ring 11 is placed on the outside of the pipe, ensuring the detection terminal 10 fits against the pipe surface. The position of the rotating sleeve 14 is adjusted to ensure the fixing ring 11 tightly wraps the pipe. Then, the textile layer 16 is fixed with the connecting bolt 18, ensuring no gap between the detection terminal 10 and the pipe. Coupling agent is applied to the detection terminal 10 and the pipe surface to reduce energy loss during ultrasonic wave propagation. The detector 5 is activated, transmitting the signal through the connecting groove 6, connection terminal 7, and transmission line 9 to the detection terminal 10. The detection terminal 10 converts the electrical signal into an ultrasonic signal and transmits it vertically into the pipe. During propagation inside the pipe, if the ultrasonic wave encounters defects such as cracks or corrosion, or the pipe's inner wall interface, it will generate a reflected echo. The detection terminal 10 receives the reflected echo, converts it into an electrical signal, and returns it to the detector 5 along the original path. The display screen of the detector 5 shows the detection waveform and results in real time, allowing the operator to visually observe the internal condition of the pipe. Meanwhile, the test data is automatically stored in the built-in data storage unit for easy review, analysis, and comparison later, providing a basis for pipeline maintenance and repair. Since the fixed ring 11 can rotate around the pipeline axis via components such as the rotating shaft 12 and the through shaft 13, operators can manually rotate the fixed ring 11 to move the test terminal 10 along the circumference of the pipeline, achieving ultrasonic testing of the entire circumference of the pipeline and ensuring no blind spots. After completing the test of a certain section, the connecting bolt 18 is loosened, and the device is moved along the pipeline axis to the next test section. The textile layer 16 is then re-fixed before continuing the test, enabling segmented testing of long-distance pipelines. By continuously testing multiple sections, the overall condition of the pipeline can be comprehensively assessed.
[0038] It should be noted that, in this document, terms such as "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A coal mine pipeline ultrasonic testing device, comprising a fixed support (1), characterized in that: The bottom end of the fixed support (1) is fixedly connected to a base (2), and the outer wall of the base (2) is fixedly connected to a plurality of extension plates (3), and the top end of the plurality of extension plates (3) away from the base (2) is connected to a support foot (4). The top of the fixed support (1) is fixedly connected to a detector (5), and a connecting groove (6) is fixedly connected to one side of the outer wall of the detector (5). Multiple connecting terminals (7) are fixedly connected to the bottom of the connecting groove (6), and each of the multiple connecting terminals (7) has an insertion port (8) at its top.
2. The coal mine pipeline ultrasonic testing device according to claim 1, characterized in that: Each of the multiple sockets (8) is fixedly connected to a transmission line (9), and a detection terminal (10) is fixedly connected to one end of each of the multiple transmission lines (9) away from the socket (8).
3. The coal mine pipeline ultrasonic testing device according to claim 2, characterized in that: A fixing ring (11) is fixedly connected to one end of the plurality of detection terminals (10) away from the transmission line (9), and a plurality of rotating shafts (12) penetrate the outer wall of the fixing ring (11).
4. The coal mine pipeline ultrasonic testing device according to claim 3, characterized in that: The inner walls of the plurality of rotating shafts (12) are penetrated by a through shaft (13), and the outer walls of the through shafts (13) are penetrated by rotating sleeves (14) at both ends. The ends of the plurality of rotating sleeves (14) away from the through shafts (13) are fixedly connected to a sealing plate (15).
5. The coal mine pipeline ultrasonic testing device according to claim 4, characterized in that: The outer walls of the multiple rotating sleeves (14) are fixedly connected with multiple textile layers (16), and the multiple textile layers (16) are all made of polyester fibers.
6. The coal mine pipeline ultrasonic testing device according to claim 5, characterized in that: A fixing port (17) is fixedly connected to one side of one of the multiple textile layers (16) near the bottom, and two connecting bolts (18) pass through one side of the two fixing ports (17).
7. The coal mine pipeline ultrasonic testing device according to claim 5, characterized in that: Each of the multiple textile layers (16) corresponds to the fixing ring (11), and the multiple textile layers (16) are located on both sides of the fixing ring (11).