Pipeline sealing detection device

Abstract

The invention discloses a pipeline sealing detection device, and the device comprises a supporting cylinder which is arranged in the axial direction of a pipeline; the two pairs of supporting rings are vertically and fixedly arranged at the two ends of the supporting cylinder respectively, a first annular cavity is formed between each pair of supporting rings, and a second annular cavity is formed between the two pairs of supporting rings; the two annular air bags are arranged in the first annular cavities respectively, and each annular air bag is provided with a first air inlet valve and a first air outlet valve which are communicated with the interior of the supporting cylinder; the pressure sensor is arranged in the second annular cavity, and the second annular cavity communicates with the interior of the supporting cylinder through a second air inlet valve and a second air outlet valve; wherein the annular air bag is arranged to be in sealing contact with the inner wall of the pipeline when a preset amount of gas is inflated into the annular air bag. The pipeline sealing detection device has the advantages of being short in inflation time, high in detection efficiency and the like.

Description

Technical Field

[0001] The present invention relates to the field of pipeline seal detection. More specifically, the present invention relates to a pipeline seal detection device. Background Art

[0002] In industrial production and infrastructure construction, pipeline systems are widely used in many fields such as oil, natural gas, chemical industry, water supply and drainage, etc. The tightness of pipeline welds is directly related to the safe and stable operation of the entire pipeline system. Once a weld leaks, serious consequences such as explosions caused by leakage of flammable and explosive gases, environmental pollution caused by leakage of toxic and harmful substances, and waste of water resources may occur. Therefore, it is crucial to accurately and efficiently detect the tightness of pipeline welds.

[0003] Currently, among many methods for detecting the tightness of pipeline welds, the air pressure detection method has been widely used due to its relatively simple operation and the ability to intuitively reflect the seal state of the weld. However, most of the existing air pressure detection methods form a closed space by directly setting plugging plates on both sides of the weld for air pressure detection. This traditional plugging method has many drawbacks, and the more prominent problem is the long inflation time, which takes a large amount of time to make the air pressure in the closed space reach the required standard for detection. In addition, the long inflation time significantly extends the cycle of each detection, resulting in low detection efficiency. In the face of large-scale pipeline laying projects or pipeline systems that need to be frequently detected, this low-efficiency detection method not only increases the labor and material costs, but also seriously affects the project progress and the normal maintenance frequency of the pipeline system. Summary of the Invention

[0004] An object of the present invention is to provide a pipeline seal detection device to at least solve the above problems.

[0005] To achieve the object and other advantages of the present invention, there is provided a pipeline seal detection device, including: a support cylinder arranged along the axial direction of the pipeline; two pairs of support rings respectively and perpendicularly fixed at both ends of the support cylinder, a first annular cavity is formed between each pair of support rings, and a second annular cavity is formed between the two pairs of support rings; two annular air bags respectively arranged in the first annular cavity, the annular air bag is provided with a first air inlet valve and a first air outlet valve communicating with the inside of the support cylinder; a pressure sensor arranged in the second annular cavity, the second annular cavity communicates with the inside of the support cylinder through a second air inlet valve and a second air outlet valve; wherein, the annular air bag is arranged such that when a preset amount of gas is filled into it, the annular air bag is in sealed contact with the inner wall of the pipeline.

[0006] Preferably, an installation collar is provided in the second annular cavity. The installation collar is coaxial with the support cylinder and is provided with a hollow. A plurality of ultrasonic transducers are provided on the outer wall of the installation collar along its circumferential direction. The plurality of ultrasonic transducers emit ultrasonic waves to the inner wall of the pipeline to detect the sealing performance of the pipeline weld.

[0007] Preferably, each ultrasonic transducer is hinged to the outer wall of the installation collar through a mounting seat. The mounting seat is driven by a driving component to swing along the length direction of the pipeline.

[0008] Preferably, the driving component includes a plurality of driving rods, which correspond to the plurality of ultrasonic transducers one by one and are fixedly provided at one end of the corresponding mounting seat close to the support cylinder; a driving ring, which is arranged in the installation collar and is coaxial with it. The driving ring is hinged to the plurality of driving rods one by one through a plurality of connecting rods; at least two linear drivers, which are fixedly arranged in the installation collar at intervals and are fixedly connected to the driving ring.

[0009] Preferably, a support shaft is fixedly provided in the support cylinder. Both ends of the support shaft penetrate through the support cylinder and are respectively connected to the leg components. The leg components include a support seat connected to the end of the support shaft, a vertical leg connected to the bottom surface of the support seat, and a horizontal leg inserted into the side surface of the support seat. The lower end of the vertical leg and both ends of the horizontal leg are respectively in sliding contact with the inner wall of the pipeline.

[0010] Preferably, first guiding holes are provided on both end faces of both ends of the horizontal leg. The first guiding holes are arranged along the length direction of the horizontal leg. Connecting columns are inserted into the first guiding holes. The connecting columns are slidably connected to the first guiding holes. One end of the connecting column extending into the first guiding hole is elastically connected to the closed end of the first guiding hole. The other end of the connecting column is in sliding contact with the inner wall of the pipeline.

[0011] Preferably, the vertical leg includes a fixed column, a movable column and a first screw sleeve arranged between the two. A second guiding hole is provided on the bottom surface of the fixed column. The second guiding hole is arranged along the length direction of the fixed column. A guiding column is provided on the top surface of the movable column. The guiding column is slidably connected to the second guiding hole. The outer wall of the movable column is provided with a first external thread. The first screw sleeve is sleeved on the fixed column and the movable column. The inner wall of the first screw sleeve is provided with a first internal thread, and the outer wall is fixedly provided with a first driving gear. The upper end of the first screw sleeve is rotatably connected to the outer wall of the fixed column, and the lower end is threadedly connected to the outer wall of the movable column. Among them, the first driving gear is driven to rotate by a first motor fixedly provided on the fixed column.

[0012] Preferably, an installation cavity with an open top is provided in the support base. A second screw sleeve is provided in the installation cavity. The second screw sleeve is rotatably connected to the inner wall of the installation cavity. Installation holes are provided on both sides of the installation cavity opposite to the end of the second screw sleeve. A limit sleeve is fixedly provided outside the installation hole. The middle part of the horizontal leg is provided with a second external thread. Among them, the second screw sleeve, the installation hole, and the limit sleeve are coaxially arranged. The middle part of the horizontal leg is inserted into the second screw sleeve, the installation hole, and the limit sleeve, and is threadedly connected to the second screw sleeve and slidably clamped along the length direction of the limit sleeve. A second driving gear is provided on the outer wall of the second screw sleeve, and the second driving gear is driven to rotate by a second motor fixedly provided on the support base.

[0013] Preferably, a traveling wheel is provided at the bottom of the movable column, and a hub motor is provided in the traveling wheel.

[0014] Preferably, a support plate is provided on one of the support bases. A group of binocular micro high-definition cameras and a signal transmission module are provided on the support plate. The signal transmission module is respectively connected to the binocular micro high-definition camera, the linear driver, the first motor, the second motor, the hub motor, and a controller provided outside the pipeline.

[0015] The present invention has at least the following beneficial effects: By providing a support cylinder in the pipeline, two pairs of support rings are provided on the support cylinder, and annular air bags are provided in each pair of support rings. Firstly, the support rings can support and protect the annular air bags, improving the sealing effect of the annular air bags on the inner wall of the pipeline after inflation, so that the second annular cavity located between the two pairs of support rings forms a closed space. Secondly, the volume of the closed space opposite to the weld, that is, the second annular cavity, is greatly reduced, effectively shortening the time for the air pressure in the second annular cavity to reach the required standard for detection and improving the detection efficiency.

[0016] Other advantages, objectives, and features of the present invention will be partially reflected by the following description and partially understood by those skilled in the art through the research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of a pipeline sealing detection device according to an embodiment of the present invention; Figure 2 is a schematic side view structure diagram of a leg assembly according to an embodiment of the present invention; Figure 3 is Figure 1 a cross-sectional structure diagram of a partial A in Figure 4 is Figure 2 a cross-sectional structure diagram of a partial B in DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] The present invention will be further described in detail below in conjunction with embodiments and the accompanying drawings, so that those skilled in the art can implement it according to the description in the specification.

[0019] It should be understood that terms such as "having", "comprising", and "including" used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0020] It should be noted that the experimental methods described in the following embodiments are all conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present invention, the orientation or positional relationship indicated by terms such as "lateral", "longitudinal", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0021] As Figures 1 to 4 shown, an embodiment of the present invention provides a pipeline sealing detection device, including: a support cylinder 1, which is arranged along the axial direction of the pipeline 2; two pairs of support rings 3, which are respectively vertically fixed at both ends of the support cylinder 1, and a first annular cavity 4 is formed between each pair of support rings 3, and a second annular cavity 5 is formed between the two pairs of support rings 3; two annular air bags 6, which are respectively arranged in the first annular cavity 4, and a first air inlet valve 7 and a first air outlet valve 8 communicating with the inside of the support cylinder 1 are arranged on the annular air bag 6; a pressure sensor, which is arranged in the second annular cavity 5, and the second annular cavity 5 communicates with the inside of the support cylinder 1 through a second air inlet valve 9 and a second air outlet valve 10; wherein, the annular air bag 6 is arranged such that when a preset amount of gas is filled into it, the annular air bag 6 is in sealing contact with the inner wall of the pipeline 2.

[0022] In the above embodiments, the pipeline sealing detection device includes a support cylinder 1, two pairs of support rings 3, two annular airbags 6 and a pressure sensor. The support cylinder 1 is an important support structure of the entire device, and it is arranged along the axial direction of the pipeline 2. The length and diameter of the support cylinder 1 are reasonably designed and customized according to different specifications of the pipeline 2 to ensure that it can perfectly adapt to the corresponding detection requirements. Preferably, the diameter of the support cylinder 1 is 1 / 2 to 2 / 3 of the diameter of the pipeline 2, so as to facilitate the installation of subsequent components while minimizing the volume of the second annular cavity 5. The support cylinder 1 is generally made of high-strength metal materials such as stainless steel, and at the same time, it should have good corrosion resistance to ensure the stability and durability of the device in various environments. Its surface is finely processed to ensure its smoothness and avoid unnecessary wear on other components during installation and use. The two pairs of support rings 3 play a key role in supporting and positioning in the entire device. These two pairs of support rings 3 are respectively vertically fixed at both ends of the support cylinder 1. In order to ensure the firmness and stability of the connection, high-strength welding technology is used to firmly fix them on the support cylinder 1. A unique first annular cavity 4 is formed between each pair of support rings 3. The size of this first annular cavity 4 is precisely calculated and designed. Its space should not only ensure that the annular airbag 6 can be smoothly placed therein, but also ensure that there is enough space for the annular airbag 6 to expand and contract freely. A second annular cavity 5 is also formed between the two pairs of support rings 3. The second annular cavity 5 plays an important role in the sealing detection, and its shape and size are also carefully designed to meet the requirements of subsequent detection operations. The two annular airbags 6 are respectively and cleverly arranged in the first annular cavity 4. The annular airbag 6 is made of a rubber material with good elasticity and sealing performance. This material can not only withstand a certain pressure, but also maintain good elasticity during repeated inflation and deflation processes to ensure its service life. The annular airbag 6 is provided with a first air inlet valve 7 and a first air outlet valve 8 that communicate with the inside of the support cylinder 1. The first air inlet valve 7 and the first air outlet valve 8 can accurately control the inflow and outflow of gas, and can also ensure good sealing performance and reliability after long-term use. The design of the first air inlet valve 7 enables the gas to enter the annular airbag 6 evenly, while the first air outlet valve 8 can ensure that the gas in the annular airbag 6 can be smoothly discharged when needed. During the manufacturing process of the annular airbag 6, its thickness and strength are also optimized according to the specific use pressure and environmental conditions to prevent rupture or air leakage during the inflation process. The pressure sensor is arranged in the second annular cavity 5. The pressure sensor is a high-precision instrument that can accurately measure the pressure change in the second annular cavity 5. The pressure sensor has the characteristics of high sensitivity and high precision and can accurately respond to subtle pressure changes. The second annular cavity 5 communicates with the inside of the support cylinder 1 through a second air inlet valve 9 and a second air outlet valve 10.Among them, the annular airbag 6 is arranged to be able to achieve sealed contact with the inner wall of the pipeline 2 when a preset amount of gas is filled into it. This preset amount of gas is calculated comprehensively based on multiple factors such as the inner diameter of the pipeline 2, the initial size of the annular airbag 6, the elastic modulus of the annular airbag 6, and specific detection pressure requirements. In actual operation, the annular airbag 6 is inflated through a gas pump connected to the first intake valve 7. When the gas gradually fills the annular airbag 6, the annular airbag 6 will expand towards the side close to the inner wall of the pipeline 2 under the limitation of the support ring 3, and finally achieve tight sealed contact with the inner wall of the pipeline 2.

[0023] During use, first vertically weld the two pairs of support rings 3 to both ends of the support cylinder 1 respectively. During the connection process, carefully check the quality of the connection points to prevent problems such as loose connection or gaps. Ensure that a uniform first annular cavity 4 is formed between each pair of support rings 3, and a regular second annular cavity 5 is formed between the two pairs of support rings 3. An annular airbag 6 is arranged in the first annular cavity 4. When placing the annular airbag 6, check whether its surface has any damage or other defects that may affect the sealing performance, and ensure that the annular airbag 6 can freely expand in the first annular cavity 4 without subsequent uneven inflation caused by folding or extrusion. At the same time, check whether the first air inlet valve 7 and the first air outlet valve 8 on the annular airbag 6 are normal to ensure that gas can flow in and out smoothly. Then install the pressure sensor in the second annular cavity 5. Ensure that the installation position of the pressure sensor is appropriate to accurately measure the pressure change in the second annular cavity 5, and calibrate the pressure sensor so that it can accurately display the pressure value. In addition, check whether the second air inlet valve 9 and the second air outlet valve 10 are well connected to the inside of the support cylinder 1 to ensure that gas can enter and exit the second annular cavity 5 normally through these two valves. Then place the support cylinder 1 along the axial direction of the pipeline 2. The length and diameter of the support cylinder 1 match the pipeline 2 to be detected to ensure the smooth progress of subsequent detection work. After completing the installation and preparation of the device, start the inflation operation of the annular airbag 6. Fill the annular airbag 6 with gas through the first air inlet valve 7. During the inflation process, use a pressure gauge to monitor the gas pressure in real time to control the inflation volume. According to the design requirements, when a preset amount of gas is filled into the annular airbag 6, the annular airbag 6 will gradually expand and finally make sealing contact with the inner wall of the pipeline 2. To reach this preset amount, it is necessary to calculate and determine through experiments based on factors such as the inner diameter of the pipeline 2, the initial size of the annular airbag 6, and the elasticity of the material. At the initial stage of inflation, slowly open the first air inlet valve 7 to allow the gas to enter the annular airbag 6 evenly. As the gas is continuously injected, the annular airbag 6 will gradually unfold and squeeze against the inner wall of the pipeline 2. At this time, closely observe the expansion of the annular airbag 6 to ensure its uniform expansion and avoid the situation where some parts expand excessively while other parts do not expand in place. If uneven expansion is found, the intake speed can be appropriately adjusted or the position of the annular airbag 6 can be slightly adjusted. When the annular airbag 6 is close to making contact with the inner wall of the pipeline 2, more precisely control the intake speed to prevent damage to the annular airbag 6 or affect the sealing effect due to too fast inflation. During the inflation process, the influence of environmental temperature on gas pressure and the volume of the annular airbag 6 also needs to be considered. If the environmental temperature is relatively high, the expansion of the gas will be more obvious, which may cause a change in the required inflation volume. Therefore, corresponding adjustments need to be made according to the actual environmental temperature to ensure that the annular airbag 6 can finally achieve stable sealing contact with the inner wall of the pipeline 2.After the annular airbag 6 makes a sealed contact with the inner wall of the pipeline 2, close the first air inlet valve 7 to prevent gas leakage. Then, fill a certain amount of gas into the second annular cavity 5 through the second air inlet valve 9. During this process, use a pressure sensor to continuously monitor the pressure change in the second annular cavity 5. If the sealing performance of the pipeline 2 is good, that is, there is no gas leakage, the reading of the pressure sensor should basically remain unchanged. However, if there is a leakage point in the pipeline 2, the gas will escape from the leakage point, resulting in a change in the gas volume in the second annular cavity 5, and thus causing a pressure drop. By continuously monitoring the reading of the pressure sensor, it can be determined whether there is a leakage in the pipeline 2. During the monitoring process, in order to improve the detection accuracy, the reading of the pressure sensor can be measured multiple times and averaged. After completing the pipeline sealing detection, first open the second air outlet valve 10 to slowly discharge the gas in the second annular cavity 5. When the gas pressure in the second annular cavity 5 drops to near atmospheric pressure, then open the first air outlet valve 8 to discharge the gas in the annular airbag 6. During the gas discharge process, pay attention to observing the contraction of the annular airbag 6 to ensure that it can return to its initial state without deformation or damage caused by gas residue. After the gas in the annular airbag 6 is completely discharged, move the device to the next weld position and wait for the next detection.

[0024] In this embodiment, by arranging a support cylinder 1 in the pipeline 2, arranging two pairs of support rings 3 on the support cylinder 1, and arranging an annular airbag 6 in each pair of support rings 3, on the one hand, the support rings 3 can support and protect the annular airbag 6, improving the sealing effect of the annular airbag 6 against the inner wall of the pipeline 2 after inflation, and making the second annular cavity 5 located between the two pairs of support rings 3 form a closed space. On the other hand, it makes the volume of the closed space opposite to the weld, that is, the second annular cavity 5, greatly reduced, effectively shortening the time required for the air pressure in the second annular cavity 5 to reach the detection standard and improving the detection efficiency.

[0025] In another embodiment, an installation collar 11 is provided in the second annular cavity 5. The installation collar 11 is coaxial with the support cylinder 1 and is hollowed out. A plurality of ultrasonic transducers 12 are arranged on the outer wall of the installation collar 11 along its circumferential direction. The plurality of ultrasonic transducers 12 emit ultrasonic waves to the inner wall of the pipeline 2 to detect the sealing performance of the pipeline weld.

[0026] In the above embodiment, an installation collar 11 is provided in the second annular cavity 5. The installation collar 11 is coaxial with the support cylinder 1 and is provided with a hollow structure. Such a hollow structure is considered for multiple reasons. On the one hand, it can reduce the weight of the entire device while ensuring its own structural strength, making the device more lightweight. On the other hand, the hollow structure is beneficial to the circulation of gas. A plurality of ultrasonic transducers 12 are provided on the outer wall of the installation collar 11 along its circumferential direction. The plurality of ultrasonic transducers 12 are evenly distributed on the outer wall of the installation collar 11, arranged along the circumferential direction, and maintain precise spacing from each other. The ultrasonic transducers 12 can emit ultrasonic waves towards the inner wall of the pipeline 2, and their working principle is based on the propagation characteristics of ultrasonic waves in different media. When the ultrasonic waves encounter the inner wall of the pipeline 2, phenomena such as reflection, refraction, and scattering will occur. For the pipeline weld part, if there are problems with the sealing performance at the weld, such as small gaps or voids, the propagation characteristics of ultrasonic waves at these positions will change significantly. By analyzing the reflected waves and scattered waves of the ultrasonic waves, the sealing performance of the pipeline weld can be detected. Specifically, under normal circumstances, when the ultrasonic waves encounter the uniform and continuous inner wall of the pipeline during propagation, the intensity and time delay of the reflected waves will be within a certain expected range. However, when there are defects in the weld, the ultrasonic waves will generate abnormal reflections and scatterings from the defects, resulting in a change in the intensity of the received reflected waves, or a delay or advance in the arrival time of the reflected waves. By precisely measuring and analyzing these abnormal signals, it can be determined whether there are sealing problems in the pipeline weld. That is, by analyzing the reflected waves of each ultrasonic transducer 12 and combining the installation positions of the ultrasonic transducers 12, precise detection of the weld leakage points can be achieved.

[0027] In another embodiment, each ultrasonic transducer 12 is hinged to the outer wall of the installation collar 11 through a mounting seat 13, and the mounting seat 13 is driven by a driving component to swing along the length direction of the pipeline 2.

[0028] In the above embodiment, each ultrasonic transducer 12 is hinged to the outer wall of the mounting collar 11 through a mounting base 13. The mounting base 13 can be composed of multiple components, including but not limited to a connecting arm, a rotating shaft, and a supporting structure, etc. The connecting arm is responsible for firmly fixing the ultrasonic transducer 12 on the mounting base 13 to ensure that it will not be displaced or loosened during operation, while the rotating shaft provides the basis for the swinging of the ultrasonic transducer 12, and the supporting structure ensures the stable installation of the mounting base 13 on the outer wall of the mounting collar 11. The mounting base 13 is driven by a driving assembly to swing along the length direction of the pipeline 2. The driving assembly can be composed of a motor, a transmission mechanism, and a controller, etc. The motor, as the power source, can provide sufficient power to drive the movement of the mounting base 13, and its power is carefully designed according to factors such as the weight of the ultrasonic transducer 12 and the torque required for swinging. The transmission mechanism usually adopts precise gear transmission, belt transmission, or link transmission, etc., to convert the rotational motion of the motor into the linear swinging motion of the mounting base 13, while ensuring the accuracy and stability of the transmission, and avoiding jamming or jitter during the movement. The controller is responsible for receiving external instructions and precisely controlling the rotation speed and rotation direction of the motor according to a preset program, so as to precisely control the swinging amplitude and speed of the mounting base 13. By driving the ultrasonic transducer 12 to swing through the mounting base 13, the ultrasonic emission angle of the ultrasonic transducer 12 is adjusted to adapt to the angular change of the weld seam and improve the detection effect. During the actual detection process, since the weld seams of the pipeline 2 may have different angles, in order to ensure that the ultrasonic transducer 12 can effectively detect the sealing performance of the weld seam, it is necessary to precisely adjust the ultrasonic emission angle. When the driving assembly drives the mounting base 13 to swing, the ultrasonic transducer 12 will change its emission angle accordingly, and can more accurately align the ultrasonic beam with the weld seam. For example, when the weld seam presents a certain inclination angle, the driving assembly will receive a corresponding signal. According to this signal, the controller will precisely control the rotation of the motor, and then drive the mounting base 13 to swing along the length direction of the pipeline 2, so that the ultrasonic emission angle of the ultrasonic transducer 12 changes accordingly, and the ultrasonic beam irradiates the weld seam at the best angle, so that the possible sealing defects in the weld seam can be detected more clearly, improving the accuracy and reliability of the detection and reducing the detection error caused by angle mismatch.

[0029] In another embodiment, the driving assembly includes a plurality of driving rods 14, which correspond to the plurality of ultrasonic transducers 12 one by one and are fixedly arranged at one end of the corresponding mounting base 13 close to the support cylinder 1; a driving ring 15, which is arranged in the mounting collar 11 and is coaxially arranged with it, and the driving ring 15 is hinged to the plurality of driving rods 14 one by one through a plurality of connecting rods 16; at least two linear drivers 17, which are fixedly arranged in the mounting collar 11 at intervals and are fixedly connected to the driving ring 15.

[0030] In the above embodiment, the driving assembly includes a plurality of driving rods 14, and the driving rods 14 play a role of transmission and connection in the driving assembly. Their number corresponds one-to-one with the number of the plurality of ultrasonic transducers 12, and each driving rod 14 is fixedly arranged at one end of the corresponding mounting seat 13 close to the support cylinder 1. To ensure sufficient strength and stability, the driving rod 14 can be made of high-strength metal materials such as aluminum alloy or alloy steel. Its shape can be designed as an elongated rod shape, and its surface is specially treated, such as polishing and anti-corrosion treatment, to reduce friction and prevent corrosion, ensuring that there will be no deformation or damage during long-term use. The driving assembly further includes a driving ring 15, and the driving ring 15 is cleverly arranged in the mounting collar 11 and coaxially arranged with it. The driving ring 15 is an important transmission component. It has a good circular structure, and its diameter and thickness are reasonably designed according to the size of the entire device and the power to be transmitted. Its manufacturing material is generally selected from high-strength metal materials to ensure that it can withstand the driving force from the linear actuator 17 and stably transmit it to the connecting rod 16. The driving ring 15 is hinged to the plurality of driving rods 14 one-to-one through a plurality of connecting rods 16. Preferably, the connecting rod 16 and the driving rod 14 are pivotally connected through a rotating shaft to realize the swinging movement of the driving rod 14. The driving assembly further includes at least two linear actuators 17, which are fixedly arranged in the mounting collar 11 at intervals and fixedly connected to the driving ring 15. The linear actuator 17 can convert electrical energy into mechanical energy of linear motion, including but not limited to an electric stack rod. To ensure the reliability and stability of the entire driving assembly, the linear actuator 17 will be accurately positioned and firmly fixed in the mounting collar 11 during installation, and the distance between them is reasonably arranged according to the size of the driving ring 15 and the required driving force distribution. By driving the driving ring 15 with the linear actuator 17, when the linear actuator 17 is started, it will generate a force of linear motion, and this force will act on the driving ring 15 fixedly connected to it, causing the driving ring 15 to move along its axis direction. The movement of the driving ring 15 will drive the driving rod 14 hinged to it one-to-one through the connecting rod 16 to swing. Due to the hinge relationship between the connecting rod 16 and the driving rod 14, the movement of the driving ring 15 will be converted into the swinging movement of the driving rod 14, and then the driving rod 14 drives the ultrasonic transducer 12 on the mounting seat 13 to adjust the angle. This structure and driving method enable the ultrasonic transducer 12 to flexibly adjust its angle according to actual needs. During the pipeline seal detection process, no matter what angle or position the weld is in, the angle of the ultrasonic transducer 12 can be accurately adjusted in this way, so that the ultrasonic beam emitted by it can cover the weld at the best angle, improving the accuracy and comprehensiveness of the detection and better detecting the seal performance of the pipeline weld.

[0031] In another embodiment, a support shaft 18 is fixedly arranged inside the support cylinder 1. Both ends of the support shaft 18 penetrate through the support cylinder 1 and are respectively connected to the leg assemblies. The leg assemblies include a support seat 19 connected to the end of the support shaft 18, a vertical leg 20 connected to the bottom surface of the support seat 19, and a horizontal leg 21 inserted into the side surface of the support seat 13. The lower end of the vertical leg 20 and both ends of the horizontal leg 21 are respectively in sliding contact with the inner wall of the pipeline 2.

[0032] In the above embodiment, a support shaft 18 is fixed in the support tube 1 to provide stable support and positioning for the support tube 1. The support shaft 18 is usually made of high-strength metal material to ensure that it has sufficient strength and rigidity to withstand the weight of the entire device and various forces that may be generated during use. The two ends of the support shaft 18 pass through the support tube 1 and are respectively connected to the leg assembly. The leg assembly includes a support seat 19 connected to the end of the support shaft 18. The support seat 19, as the core part of the leg assembly, plays an important role in connection and bearing. The bottom surface of the support seat 19 is connected to the vertical leg 20, and its side surface is plugged into the horizontal leg 21. The vertical leg 20 is the main load-bearing component, and its length is reasonably designed according to the actual support requirements and the size of the pipeline 2. The vertical leg 20 is also made of high-strength metal material, and its cross-sectional shape can be circular, square or other shapes to ensure its stability when under pressure. The horizontal leg 21 is designed to enhance the stability and adaptability of the entire leg assembly. It can be flexibly plugged in or disassembled according to different usage scenarios and the shape of the pipeline 2. The horizontal leg 21 is also made of a solid metal material, and its structure may be in a retractable form to facilitate use in pipelines 2 of different diameters. The lower end of the vertical leg 20 and the two ends of the horizontal leg 21 are designed with special sliding contact parts, which may be made of materials with low friction coefficients, such as polytetrafluoroethylene or nylon, to ensure smooth sliding when in contact with the inner wall of the pipeline 2. Through this sliding contact method, the entire leg assembly can be flexibly moved on the inner wall of the pipeline 2 as needed. The support tube is supported by the support shaft and the leg assembly, and the end of the leg is in sliding contact with the inner wall of the pipeline 2, which facilitates the overall movement of the support tube. In actual use, the support shaft 18 provides a stable internal support for the support tube 1, and the leg assembly combines the vertical leg 20 and the horizontal leg 21 through the support seat 19 to provide external support and positioning for the support tube 1. The ends of the vertical legs 20 and the horizontal legs 21 are in sliding contact with the inner wall of the pipe 2, so that the entire device can be easily moved in the pipe 2. Whether it is adjusting the position during the installation process or moving the device to another position for the next inspection after the inspection is completed, this sliding contact method can be used to conveniently and quickly perform the overall translation operation of the support tube 1, which greatly improves the ease of use and operating efficiency of the device, while also ensuring the stability and support effect of the device at different positions, so that the pipeline sealing detection work can be carried out more smoothly.

[0033] In another embodiment, first guide holes are provided on the end faces at both ends of the horizontal leg 21. The first guide holes are arranged along the length direction of the horizontal leg 21. A connecting column is inserted into the first guide holes. The connecting column is slidably connected to the first guide holes, and one end of the connecting column extending into the first guide holes is elastically connected to the closed end of the first guide holes. The other end of the connecting column is in sliding contact with the inner wall of the pipeline.

[0034] In the above embodiment, first guide holes are provided on the end faces at both ends of the horizontal leg 21. These guide holes are arranged along the length direction of the horizontal leg 21, aiming to provide a flexible adjustment mechanism. Inside the first guide holes, a connecting column is inserted. The connecting column is slidably connected to the guide holes, ensuring the stability of the connection and the smoothness of adjustment. One end of the connecting column extending into the first guide holes is elastically connected to the closed end of the guide holes. This design not only enhances the firmness of the connection but also endows the connecting column with certain buffering and self-adaptive capabilities. In practical applications, when the entire device is placed inside the pipeline, the connecting columns at both ends of the horizontal leg 21 come into sliding contact with the inner wall of the pipeline. Thanks to the sliding connection design of the first guide holes and the connecting column, as well as the elastic connection between the connecting column and the closed end of the guide holes, both ends of the horizontal leg 21 can be finely adjusted according to the actual shape and minor changes of the inner wall of the pipeline. This fine adjustment mechanism ensures that the device can maintain stable support and positioning in pipelines with different diameters and shapes, effectively avoiding the phenomenon of device shaking or instability caused by the irregularity of the inner wall of the pipeline. In addition, the sliding contact between the connecting column and the inner wall of the pipeline further enhances the adaptability and flexibility of the entire device. Whether it is necessary to adjust the position during the installation process or move the device to another position for the next detection after the detection is completed, the position of both ends of the horizontal leg 21 can be easily finely adjusted by simply sliding the connecting column. This design not only greatly improves the convenience and operation efficiency of the device but also ensures the stability and support effect of the device at different positions, providing a strong guarantee for the smooth progress of the pipeline sealing detection work.

[0035] In another embodiment, the vertical leg 20 includes a fixed column 22, a movable column 23, and a first screw sleeve 24 disposed therebetween. The bottom surface of the fixed column 22 is provided with a second guide hole 25, and the second guide hole 25 is arranged along the length direction of the fixed column 22. The top surface of the movable column 23 is provided with a guide post 26, and the guide post 26 is slidably connected to the second guide hole 25. The outer wall of the movable column 23 is provided with a first external thread. The first screw sleeve 24 is sleeved on the fixed column 22 and the movable column 23. The inner wall of the first screw sleeve 24 is provided with a first internal thread, and the outer wall is fixedly provided with a first driving gear 27. Moreover, the upper end of the first screw sleeve 24 is rotatably connected to the outer wall of the fixed column 22, and the lower end is threadedly connected to the outer wall of the movable column 23. Among them, the first driving gear 27 is driven to rotate by a first motor 28 fixedly arranged on the fixed column 22.

[0036] In the above embodiment, the vertical leg 20 mainly consists of a fixed column 22, a movable column 23, and a first screw sleeve 24 disposed therebetween. The fixed column 22 serves as the basis for support, and a second guiding hole 25 extending along its length direction is formed on its bottom surface. The second guiding hole 25 provides precise guidance for the up and down movement of the movable column 23. A guiding column 26 is arranged on the top surface of the movable column 23, and this guiding column forms a tight sliding connection with the second guiding hole 25 on the bottom surface of the fixed column 22, ensuring the smooth movement of the movable column 23 in the vertical direction and effectively preventing its skew or wobbling during the movement. The outer wall of the movable column 23 is provided with a first external thread. The first screw sleeve 24 is the core component for connection and adjustment, and is sleeved on the fixed column 22 and the movable column 23. The inner wall of the first screw sleeve 24 is provided with a first internal thread that matches the first external thread of the movable column 23. This thread matching mechanism enables the first screw sleeve 24 to perform precise vertical movement along the outer wall of the movable column 23 when it rotates, thereby realizing the adjustment of the height of the movable column 23. A first driving gear 27 is fixedly installed on the outer wall of the first screw sleeve 24, realizing the conversion between the motor power and the rotation of the screw sleeve. The first driving gear 27 is driven to rotate by a first motor 28 fixedly installed on the fixed column 22. The first motor 28 serves as the power source of the entire adjustment system, and its precise rotational speed control and stable power output ensure the smooth and precise rotation of the first driving gear 27. When the first motor 28 is started, its power is transmitted to the first driving gear 27 through the transmission mechanism, thereby driving the rotation of the first screw sleeve 24. Since the first screw sleeve 24 is tightly connected to the movable column 23 through threads, when the first screw sleeve 24 rotates, the movable column 23 will move up and down under the guidance of the threads, thereby realizing the precise adjustment of the height of the vertical leg 20. This design not only greatly improves the flexibility and precision of the height adjustment of the vertical leg 20, but also makes the adjustment process more convenient and efficient through the automatic control of the motor. Whether during installation, debugging, or use, the precise adjustment of the height of the vertical leg 20 can be easily achieved according to needs, providing a strong guarantee for the stable support of the entire device in different working environments.

[0037] In another embodiment, an installation cavity 29 with an open top is provided in the support base 19. A second screw sleeve 30 is provided in the installation cavity 29. The second screw sleeve 30 is rotatably connected to the inner wall of the installation cavity 29. Installation holes are provided on both sides of the installation cavity 29 opposite to the end of the second screw sleeve 30. A limit sleeve 31 is fixedly provided outside the installation holes. A second external thread is provided in the middle of the horizontal leg 21. Among them, the second screw sleeve 30, the installation holes and the limit sleeve 31 are coaxially arranged. The middle of the horizontal leg 21 is inserted into the second screw sleeve 30, the installation holes and the limit sleeve 31, and is threadedly connected to the second screw sleeve 30 and slidably clamped with the limit sleeve 31 along its length direction. A second driving gear 32 is provided on the outer wall of the second screw sleeve 30. The second driving gear 32 is driven to rotate by a second motor 33 fixedly provided on the support base 13.

[0038] In the above embodiments, an installation cavity 29 with an open top is designed inside the support base 19. This installation cavity 29 not only provides installation space for the subsequent components, but also ensures the compactness and stability of the entire structure. Inside the installation cavity 29, a second screw sleeve 30 is configured. The second screw sleeve 30 is flexibly rotatably connected to the inner wall of the installation cavity 29. This design enables the second screw sleeve 30 to freely rotate within the installation cavity 29 without driving the entire support base 19 to rotate together. To further enhance the stability of the structure and the accuracy of adjustment, installation holes are provided on both sides of the installation cavity 29 opposite to the ends of the second screw sleeve 30. These two installation holes not only provide a passage for the insertion of the horizontal leg 21, but also ensure the stability and accuracy of the horizontal leg 21 during movement. Outside the installation holes, a limit sleeve 31 is fixedly installed. This design not only enhances the stability of the structure, but also provides precise limitation for the movement of the horizontal leg 21, preventing it from deflecting or shaking during movement. The middle part of the horizontal leg 21 is provided with an external second thread. When the middle part of the horizontal leg 21 is inserted into the second screw sleeve 30, the installation holes and the limit sleeve 31, the external second thread forms a tight threaded connection with the inner wall of the second screw sleeve 30. This threaded engagement mechanism enables the second screw sleeve 30 to drive the horizontal leg 21 to perform precise horizontal movement when it rotates, thereby realizing the adjustment of the extended length at both ends of the horizontal leg 21. A second drive gear 32 is fixedly installed on the outer wall of the second screw sleeve 30, realizing the conversion between the motor power and the rotation of the second screw sleeve 30. The second drive gear 32 is driven to rotate by a second motor 33 fixedly installed on the support base 19. The second motor 33, as the power source of the entire adjustment system, its precise rotational speed control and stable power output ensure the smooth and precise rotation of the second drive gear 32. When the second motor 33 is started, its power is transmitted to the second drive gear 32 through the transmission mechanism, thereby driving the rotation of the second screw sleeve 30. Since the limit sleeve 31 provides precise limitation for the movement of the horizontal leg 21, when the second screw sleeve 30 rotates, the horizontal leg 21 will perform horizontal movement under the guidance of the thread without deflecting or shaking. This design not only greatly improves the flexibility and accuracy of the adjustment of the extended length of the horizontal leg 21, but also makes the adjustment process more convenient and efficient through the automatic control of the motor. Whether during installation, debugging or use, the precise adjustment of the extended length of the horizontal leg 21 can be easily achieved according to needs, providing a strong guarantee for the stable support of the entire equipment in different working environments.

[0039] In another embodiment, a traveling wheel is provided at the bottom of the movable column 23, and a hub motor is provided inside the traveling wheel.

[0040] In the above embodiment, a traveling wheel is installed at the bottom of the movable column 23. A hub motor is configured on the traveling wheel. The hub motor serves as the direct driving power source for the rotation of the traveling wheel. It is exquisitely designed, small in size and light in weight, and can provide powerful torque and stable power output. The movement of the movable column 23 no longer depends on an external power source or a complex transmission mechanism, but can be realized through the direct drive of the hub motor, endowing the movable column 23 with flexibility in movement, enhancing the adaptability and portability of the vertical leg 20, and providing a strong guarantee for the efficient and stable support of the entire device in different working environments.

[0041] In another embodiment, a support plate 34 is provided on one of the support seats 19. A set of binocular micro high-definition cameras 35 and a signal transmission module are provided on the support plate 34. The signal transmission module is respectively connected to the binocular micro high-definition camera 35, the linear driver 17, the first motor 28, the second motor 33, the hub motor and a controller provided outside the pipeline.

[0042] In the above embodiment, a sturdy and stable support plate 34 is installed on the top of one of the support seats 19, ensuring the smooth operation of the equipment installed thereon. On the surface of the support plate 34, a binocular micro high-definition camera 35 is installed. The binocular micro high-definition camera 35 can simulate the stereoscopic vision of humans, thereby achieving high-definition and three-dimensional capture of the internal scene of the pipeline. This group of cameras not only has high resolution and can clearly capture various details inside the pipeline, including key information such as welds and cracks, but also its binocular design enables the system to utilize the principle of parallax and, through the built-in three-dimensional reconstruction algorithm, accurately calculate the three-dimensional coordinate information of the weld area inside the pipeline. Specifically, when the binocular micro high-definition cameras 35 start working, they will synchronously capture the images inside the pipeline and, through the built-in image processing algorithm, quickly analyze the three-dimensional position information of the weld center relative to the reference point of the camera. For example, the weld center may be located 15 centimeters directly in front of the reference point of the binocular high-definition camera, 5 millimeters to the left of the central axis of the support cylinder, and there is a 15° clockwise tilt angle. Based on these three-dimensional coordinate information and the known distance d centimeters between the reference point of the binocular high-definition camera and the center of the ultrasonic transducer array composed of multiple ultrasonic transducers, the controller can accurately calculate the adjustments that the ultrasonic transducer array needs to make through complex geometric calculations and spatial transformation algorithms. For example, in order to ensure that the ultrasonic beam can perfectly align with the weld, the ultrasonic transducer array may need to be translated 15 + d centimeters forward, 5 millimeters to the left, and rotated 15° clockwise. Once the required adjustment amount is calculated, the controller will immediately send these instructions to the actuators such as the linear drive 17, the first motor 28, the second motor 33, and the hub motor through the signal transmission module for precise adjustment. After receiving the instructions from the controller, these actuators will immediately start and adjust the position of the ultrasonic transducer array with extremely high precision and speed to ensure that it can perfectly align with the weld area. Through this design, not only the high-precision three-dimensional positioning of the weld area inside the pipeline is achieved, but also the position of the ultrasonic transducer array can be quickly adjusted according to the positioning result, enabling it to detect the weld at the best angle and position. This not only greatly improves the accuracy and efficiency of the detection, but also provides reliable data support for subsequent weld evaluation and repair work.

[0043] The number of devices and the scale of processing described here are used to simplify the description of the present invention. The application, modification, and variation of the pipeline seal detection device of the present invention will be obvious to those skilled in the art.

[0044] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and embodiments. It can be fully applied to various fields suitable for the present invention. For those skilled in the art, additional modifications can be easily made. Therefore, without departing from the general concept defined by the claims and their equivalents, the present invention is not limited to the specific details and the examples shown and described herein.

Claims

1. A pipeline sealing detection device, characterized in that: include: A support cylinder, which is arranged along the axial direction of the pipeline; Two pairs of support rings are respectively and vertically fixedly arranged at the two ends of the support tube, a first annular cavity is formed between each pair of support rings, and a second annular cavity is formed between the two pairs of support rings; Two annular airbags, which are respectively arranged in the first annular cavity, and the annular airbags are provided with a first air inlet valve and a first air outlet valve which are connected with the interior of the support tube; A pressure sensor is disposed in the second annular cavity, and the second annular cavity is connected to the interior of the support tube through a second air inlet valve and a second air outlet valve; wherein, The annular airbag is configured such that when a preset amount of gas is filled into the annular airbag, the annular airbag is in sealing contact with the inner wall of the pipe.

2. The pipeline sealing detection device according to claim 1, characterized in that: A mounting ring is provided in the second annular cavity. The mounting ring is coaxial with the support tube and is hollowed out. A plurality of ultrasonic transducers are provided on the outer wall of the mounting ring along its circumference. The plurality of ultrasonic transducers emit ultrasonic waves to the inner wall of the pipeline to detect the sealing performance of the pipeline weld.

3. The pipeline sealing detection device according to claim 2, characterized in that: Each ultrasonic transducer is hinged to the outer wall of the mounting collar via a mounting seat, and the mounting seat is driven by a driving assembly to swing along the length direction of the pipeline.

4. The pipeline sealing detection device according to claim 3, characterized in that: The driving assembly includes a plurality of driving rods, which correspond one-to-one to the plurality of ultrasonic transducers and are fixedly mounted on one end of the corresponding mounting seat close to the support tube; a driving ring, which is arranged in the mounting collar and coaxially arranged therewith, and the driving ring is hingedly connected to the plurality of driving rods one-to-one through a plurality of connecting rods; and at least two linear drivers, which are fixedly mounted in the mounting collar at intervals and fixedly connected to the driving ring.

5. The pipeline sealing detection device according to claim 3, characterized in that: A support shaft is fixed in the support tube, and both ends of the support shaft pass through the support tube and are respectively connected to the leg assemblies. The leg assemblies include a support seat connected to the end of the support shaft, a vertical leg connected to the bottom surface of the support seat, and a horizontal leg plugged into the side of the support seat. The lower end of the vertical leg and both ends of the horizontal leg are in sliding contact with the inner wall of the pipe respectively.

6. The pipeline sealing detection device according to claim 5, characterized in that: A first guide hole is provided on both end surfaces of the horizontal support leg, and the first guide hole is arranged along the length direction of the horizontal support leg. A connecting column is inserted into the first guide hole, and the connecting column is slidably connected to the first guide hole. One end of the connecting column extending into the first guide hole is elastically connected to the closed end of the first guide hole, and the other end of the connecting column is in sliding contact with the inner wall of the pipe.

7. The pipeline sealing detection device according to claim 6, characterized in that: The vertical support leg includes a fixed column, a movable column and a first screw sleeve arranged therebetween, the bottom surface of the fixed column is provided with a second guide hole, the second guide hole is arranged along the length direction of the fixed column, the top surface of the movable column is provided with a guide column, the guide column is slidably connected to the second guide hole, the outer wall of the movable column is provided with a first external thread, the first screw sleeve is sleeved on the fixed column and the movable column, the inner wall of the first screw sleeve is provided with a first internal thread, the outer wall is fixedly provided with a first driving gear, and the upper end of the first screw sleeve is rotatably connected to the outer wall of the fixed column, and the lower end is threadedly connected to the outer wall of the movable column, wherein the first driving gear is driven to rotate by a first motor fixed to the fixed column.

8. The pipeline sealing detection device according to claim 7, characterized in that: The support seat is provided with an installation cavity with an open top, and a second screw sleeve is provided in the installation cavity, and the second screw sleeve is rotatably connected to the inner wall of the installation cavity, and installation holes are provided on both sides of the installation cavity opposite to the end of the second screw sleeve, and a limiting sleeve is fixedly provided on the outer side of the installation hole, and a second external thread is provided in the middle part of the horizontal support leg, wherein the second screw sleeve, the installation hole and the limiting sleeve are coaxially arranged, and the middle part of the horizontal support leg is inserted in the second screw sleeve, the installation hole and the limiting sleeve, and is threadedly connected with the second screw sleeve, and is slidably engaged with the limiting sleeve along its length direction, and the outer wall of the second threaded sleeve is provided with a second driving gear, and the second driving gear is driven to rotate by a second motor fixed to the support seat.

9. The pipeline sealing detection device according to claim 8, characterized in that: A running wheel is arranged at the bottom of the movable column, and a hub motor is arranged inside the running wheel.

10. The pipeline sealing detection device according to claim 9, characterized in that: A support plate is provided on one of the support seats, and a group of binocular micro high-definition cameras and a signal transmission module are provided on the support plate. The signal transmission module is respectively connected to the binocular micro high-definition camera, the linear drive, the first motor, the second motor, the hub motor and a controller provided outside the pipeline.

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