An air ultrasonic internal detector
By incorporating the support wheels and sealing cup design of the air ultrasonic internal detector, the problem of liquid residue in the gas delivery pipeline is solved, achieving seamless detection and high accuracy, and improving the versatility of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANGHAI DINGYIN M&E EQUIP CO LTD
- Filing Date
- 2025-08-28
- Publication Date
- 2026-08-04
AI Technical Summary
Existing ultrasonic detectors pose safety hazards due to residual liquid media in gas pipeline inspections and cannot meet the inspection requirements of demanding environments.
An air ultrasonic internal detector was designed, employing multiple sets of support wheels and sealing cups to ensure that the probe is concentric with the pipe. It uses air as the propagation medium and is equipped with sealing cups to reduce ultrasonic leakage, thereby achieving accurate detection.
It enables seamless detection in gas transmission pipelines, avoids liquid medium residue, improves detection accuracy and equipment versatility, and meets the detection needs of various types of pipelines.
Smart Images
Figure CN224594573U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of pipeline ultrasonic testing equipment, and in particular to an air ultrasonic internal detector. Background Technology
[0002] Ultrasonic detectors (internal ultrasonic detectors) are used for quality inspection inside oil pipelines and gas storage pipelines. During inspection, the split probe of the ultrasonic detector is placed inside one end of the pipeline (the ultrasonic detector and the ultrasonic probe are connected by a wire outside the pipeline). Then, a traction rope pulls the ultrasonic probe from the other end, moving it from front to back inside the pipeline for seamless multi-angle detection. The working principle of the ultrasonic probe in conjunction with the ultrasonic detector in pipeline quality inspection mainly relies on the piezoelectric crystal inside. When voltage is applied to the piezoelectric crystal, it is excited and generates ultrasonic signals. These signals are emitted into the pipeline being inspected by the transmitter head of the ultrasonic probe. The receiver of the acoustic probe can receive the reflected ultrasonic signals and output them to the signal conversion board. The signal conversion board converts them into electrical signals. These electrical signals are then analyzed and processed by the main control system of the ultrasonic detector located outside the pipeline. (At the same time, multiple mileage wheels of the ranging mechanism output signals to the signal input terminal of the ranging mechanism installed outside the pipeline and together with the ultrasonic detector. The inspector can understand the specific location of the ultrasonic probe inside the pipeline by the distance signal displayed by the ranging mechanism.) By calculating the time difference between the transmitted signal and the echo signal, the location of defects in the pipeline can be accurately determined (such as cracks, dents, etc. at a specific location on the inner wall of the pipeline).
[0003] To ensure simultaneous detection of all angles along the circumference of a pipeline, existing ultrasonic detectors for pipelines typically employ multiple sets of ultrasonic probes, arranged in a ring around the probe holder. While multiple probes can maintain perpendicularity to the pipeline wall and achieve relatively better detection results, various uncertainties within the pipeline, such as deformation, welds, flange connections, and bends, can lead to excessive gaps between the probe and the pipeline wall. Furthermore, ultrasonic waves suffer significant propagation loss in air. Therefore, a coupling agent (such as water or oil) needs to be added between the ultrasonic probe and the pipeline wall to facilitate ultrasonic wave transmission and reception. However, if such ultrasonic detectors are used in gas pipelines, these liquid media will remain in the pipeline after detection, posing a safety hazard when the pipeline is subsequently used for gas transport (e.g., liquid entering gas-using equipment and causing malfunctions). In some demanding and specialized environments, such ultrasonic detectors are not suitable for pipeline inspection. Utility Model Content
[0004] To overcome the shortcomings of existing ultrasonic detectors used in the inspection of gas pipelines, which are limited by their structure and have the drawbacks described in the background art, this utility model provides an ultrasonic internal detector body. In application, multiple sets of support wheels ensure that the multiple probes of the ultrasonic internal detector body are concentric with the pipeline, so that the probes of the air ultrasonic probe body are always perpendicular to the inner wall of the steel pipe. At the same time, multiple sets of sealing cups are configured, so that the probes can operate better and more stably in the pipeline and play a role in sealing the pipeline and reducing ultrasonic leakage as much as possible. The probes can directly use air as the propagation medium, which can accurately detect defects in the inner wall of the pipeline. This air ultrasonic internal detector not only meets the quality inspection needs of various types of pipelines, but also improves the versatility of the air ultrasonic internal detector body.
[0005] The technical solution adopted by this utility model to solve its technical problem is: An air ultrasonic internal detector includes an air ultrasonic internal detector body with a multi-component split ultrasonic probe, a ranging mechanism with mileage wheels, a universal joint mechanism, a support cup, a sealing cup, a battery compartment, an electronic component compartment, and a support wheel mechanism. The ranging mechanism and the air ultrasonic internal detector body are mounted together. There are at least two sets of the universal joint mechanism, and multiple sets of the sealing cup, support cup, and mileage wheels. A battery is installed in the battery compartment. A traction ring is fixedly mounted on the front outer side of the battery compartment. Multiple sets of mileage wheel brackets are fixedly mounted at intervals on their front sides at the rear outer end of the battery compartment. Multiple sets of sealing cups are fixedly mounted at intervals on their outer ends of the battery compartment. The front end of the first universal joint mechanism is fixedly mounted together with the rear outer side of the battery compartment. The signal conversion board of the air ultrasonic internal detector body probe is installed in the electronic component compartment. The rear end of the universal joint mechanism and the front outer end of the electronic component compartment are fixedly installed together. At least two other sets of sealing cups are fixedly installed on the outer side of the electronic component compartment at intervals. The support wheel mechanism includes an inner cylinder, support plates, and support wheels. There are multiple sets of support plates, which are fixedly installed on the outer side of the inner cylinder at intervals. Multiple sets of ultrasonic probes are installed on the rear outer side of the inner cylinder at intervals. There are multiple sets of support wheels. The front side of the brackets of multiple sets of support wheels is fixedly installed on the rear end of the first support plate at intervals. The front side of the brackets of multiple sets of support wheels is fixedly installed on the rear end of the rear support plate at intervals. The front and rear ends of the second universal joint mechanism are fixedly installed on the rear outer end of the electronic component compartment and the front outer side of the first support plate, respectively. The inner sides of multiple support cups are fixedly installed on the outer sides of multiple support plates.
[0006] Furthermore, the wires connecting the battery, signal conversion board, ultrasonic probe, odometer wheel, air ultrasonic internal detector body, and ranging mechanism are all installed inside an insulating rubber tube, and a traction rope is fixedly installed inside the traction ring.
[0007] Furthermore, the sealing cup has a conical structure, with its outer diameter being larger than that of the supporting cup and larger than that of the pipe being tested.
[0008] Furthermore, the outer diameters of the supporting cup, multiple sets of supporting wheels, and multiple sets of mileage wheels are all the same.
[0009] Compared with existing technologies, the advantages of this invention are as follows: Based on the ultrasonic internal detector body, in application, the probe can be pulled out from one side of the pipe to the other by traction steel wire rope, enabling seamless inspection of the pipe inner wall. Due to multiple sets of support wheels contacting the pipe inner wall, coordinating with multiple sets of mileage wheels and multiple sets of support cups, it ensures that the multiple probes of the ultrasonic internal detector body are concentric with the pipe inner wall, and protects the inner cylinder and ultrasonic probes. This ensures that the multiple probes of the air ultrasonic probe body are always perpendicular to the inner wall of the steel pipe, thus achieving accurate detection. Simultaneously, the configuration of multiple sets of sealing cups allows the probe to operate better and more stably in the pipe, and minimizes ultrasonic leakage by sealing the pipe. The probe can directly use air as the propagation medium, without the need for water, oil, or other liquids as coupling media, enabling accurate detection of defects in the pipe inner wall. This not only meets the quality inspection needs of various types of pipelines but also improves the versatility of the air ultrasonic internal detector body. In summary, this invention has good application prospects. Attached Figure Description
[0010] The present invention will be further described below with reference to the accompanying drawings.
[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model.
[0012] Figure 2 This is a structural schematic diagram of the battery compartment and other components of this utility model.
[0013] Figure 3 This is a structural schematic diagram of the electronic component compartment of this utility model.
[0014] Figure 4 This is a structural schematic diagram of the support wheel mechanism of this utility model. Detailed Implementation
[0015] Figure 1 , 2As shown in Figures 3 and 4, an air ultrasonic internal detector includes an air ultrasonic internal detector body (not shown in the figure) with a multi-component split ultrasonic probe 1, a ranging mechanism (not shown in the figure) with three sets of odometer wheels 2, universal joint mechanisms 31 and 32, a support cup 4, a sealing cup 5, a battery compartment 6, an electronic component compartment 7, and a support wheel mechanism 8. The signal output terminals of the three sets of odometer wheels 2 of the ranging mechanism and the signal input terminals of the ranging mechanism are connected by wires. The ranging mechanism and the air ultrasonic internal detector body are installed together.There are two sets of universal joint mechanisms 31 and 32, five sets of sealing cups 5, and three sets of supporting cups 4. A battery (not shown in the diagram; the battery powers the signal conversion board, ultrasonic probe, and mileage wheel) is installed inside the cylindrical hollow battery compartment 6. A traction ring 9 is fixedly installed in the middle of the front outer side of the battery compartment. There is a movable door (not shown in the diagram) on the lower side of the battery compartment. One side of the movable door is bolted to the outer end of the battery compartment (the movable door is closed during use; when charging is needed, the bolts are removed, and then the movable door is opened to remove the battery for charging). The three sets of mileage wheel 2 brackets of the ranging mechanism are evenly spaced and fixedly installed at the rear lower end of the battery compartment 6. Around the outer perimeter, three sets of sealing cups 5 are fixedly installed on the inner sides of the battery compartment 6 at intervals. The front end of the first universal joint mechanism 31 is fixedly installed together with the middle of the rear outer side of the battery compartment 6. The signal conversion board (not shown in the figure) of the air ultrasonic internal detector body probe is installed inside the cylindrical hollow electronic component compartment 7. The rear end of the first universal joint mechanism 31 is fixedly installed together with the middle of the front outer end of the electronic component compartment 7. The inner sides of the fourth and fifth sets of sealing cups 5 are fixedly installed on the outer side of the electronic component compartment 7 at intervals. The support wheel mechanism includes an inner cylinder 81, a support plate 82, and a support wheel 83. The annular support plate has three... The inner cylinder consists of three sets of hollow support plates, each fixedly installed at equal intervals on the outer side. Multiple sets of ultrasonic probes are also installed in a ring at equal intervals on the rear outer side of the inner cylinder, positioned between the second and third support plates. Ten sets of support wheels are provided; five sets have their supports fixedly installed at equal intervals on the front side of the first support plate, and the other five sets have their supports fixedly installed at equal intervals on the front side of the third support plate. The front and rear ends of the second universal joint mechanism 32 are fixedly installed at the middle of the rear outer side of the electronic component compartment and the middle of the front outer side of the first support plate, respectively. Three support cups... The inner side is fixedly installed on the outer side of the three support plates. The signal output terminals of multiple ultrasonic probes and the signal input terminals of the signal conversion board are connected by wires. The signal output terminal of the signal conversion board and the signal input terminal of the air ultrasonic internal detector body are connected by wires. The power output terminal of the battery and the power input terminals of the signal conversion board, multiple ultrasonic probes, and multiple sets of odometer wheels are connected by wires. There is a wire hole on the front side of the inner cylinder, the rear and front sides of the electronic component compartment, and the upper rear and front sides of the battery compartment. Wires with length slack that are connected to the battery, signal conversion board, ultrasonic probes, and odometer wheels are introduced and exited through the wire holes (the wire holes are sealed with sealant).
[0016] Figure 1 , 2As shown in Figures 3 and 4, the wires connecting the battery, signal conversion board, ultrasonic probe 1, odometer wheel 2, air ultrasonic internal detector body, and ranging mechanism are all encased in an insulating tubing (not shown in the figure). A traction steel wire rope (not shown in the figure) is fixedly installed inside the traction ring. The sealing cup 5 has a conical structure with a smaller front and a larger rear. The outer diameter of the sealing cup 5 is larger than the outer diameter of the supporting cup 4 and larger than the inner diameter of the pipe being tested (not shown in the figure). The outer diameters of the supporting cup 4 and its five sets of supporting wheels 83, the other five sets of supporting wheels 83, and the three sets of odometer wheels 2 are all the same.
[0017] Figure 1 , 2As shown in Figures 3 and 4, when this novel device is used for pipeline quality inspection, the split-type ultrasonic probe 1 of the ultrasonic detector body is placed inside one end of the pipeline. Then, the ultrasonic probe 1 is pulled from the other end of the pipeline by a traction steel wire rope to move from front to back inside the pipeline for seamless multi-angle detection. The working principle of the ultrasonic probe 1 in conjunction with the ultrasonic detector when detecting pipeline quality mainly relies on its internal piezoelectric crystal. When voltage is applied to the piezoelectric crystal, it is excited and generates ultrasonic signals. These signals are emitted into the pipeline being inspected by the transmitting head of the ultrasonic probe 1. At the same time, the receiving head of the ultrasonic probe can receive the reflected ultrasonic signals and output them to the signal conversion board. The circuit board converts the signal into an electrical signal, which is then analyzed and processed by the main control system of the ultrasonic detector located outside the pipe. (At the same time, the three odometer wheels of the ranging mechanism output signals to the signal input terminal of the ranging mechanism, which is installed outside the pipe and together with the ultrasonic detector body. The inspector can understand the specific location of the ultrasonic probe inside the pipe by the distance signal displayed by the ranging mechanism. The main function of the three odometer wheels is to ensure that when the inner diameter of the pipe is large, the lower odometer wheel can contact the lower part of the pipe to rotate and stably output the signal.) By calculating the time difference between the transmitted signal and the echo signal, the location of the defect in the pipe can be accurately determined (such as a crack or dent at a specific location on the inner wall of the pipe). Specifically, in this new invention, due to the presence of the first and second universal joint mechanisms (allowing for smooth passage even with slight bends in the pipeline), the entire device can move relatively smoothly within the pipeline for detection. Because the ten sets of support wheels 83 and the mileage wheel 2 respectively make circumferential contact with the inner wall of the pipeline, it ensures that the multiple probes of the ultrasonic internal detector body are concentric with the inner wall of the pipeline, achieving accurate detection as the multiple probes of the air ultrasonic probe body are always perpendicular to the inner wall of the steel pipe. Due to the presence of the support cup 4, it provides wear-resistant protection to the outer side of the inner cylinder 81 when encountering protrusions in the pipeline, correspondingly protecting the ultrasonic probe 1. Because the outer diameter of the five sets of sealing cups 5 is larger than the inner diameter of the pipeline and has good elasticity, it can effectively seal the pipeline and reduce ultrasonic leakage, allowing direct transmission through air without the need for water, oil, or other liquids as coupling media, enabling accurate detection of defects on the inner wall of the pipeline. This new invention not only meets the quality inspection needs of various types of pipelines but also improves the versatility of the air ultrasonic internal detector body.
[0018] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.
[0019] Furthermore, it should be understood that although this specification describes the embodiments, the embodiments do not necessarily contain only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.
Claims
1. An air ultrasonic internal detector, comprising an air ultrasonic internal detector body with a multi-component ultrasonic wave probe, a ranging mechanism with a mileage wheel, a universal joint mechanism, a supporting leather cup, a sealing leather cup, a battery compartment, an electronic component compartment, a supporting wheel mechanism, the ranging mechanism and the air ultrasonic internal detector body are mounted together; characterized in that, The universal joint mechanism has at least two sets, and there are multiple sets of sealing cups, supporting cups, and mileage wheels. A battery is installed inside the battery compartment. A traction ring is fixedly installed on the front outer side of the battery compartment. Multiple sets of mileage wheel brackets are fixedly installed at intervals on the front side of the rear outer end of the battery compartment. Multiple sets of sealing cups are fixedly installed at intervals on the outer end of the battery compartment. The front end of the first universal joint mechanism is fixedly installed together with the rear outer side of the battery compartment. The signal conversion board of the air ultrasonic internal detector probe is installed inside the electronic component compartment. The rear end of the first universal joint mechanism is fixedly installed together with the front outer end of the electronic component compartment. Additionally, at least two sets of sealing cups are fixedly installed at intervals on the electronic component compartment. The outer side of the compartment; the support wheel mechanism includes an inner cylinder, support plates, and support wheels. There are multiple sets of support plates, which are fixedly installed on the outer side of the inner cylinder at intervals. Multiple sets of ultrasonic probes are installed on the rear outer side of the inner cylinder at intervals. There are multiple sets of support wheels, in which the front side of the brackets of multiple sets of support wheels is fixedly installed on the rear end of the first support plate at intervals. The front side of the brackets of other multiple sets of support wheels is fixedly installed on the rear end of the rear support plate at intervals. The front and rear ends of the second universal joint mechanism are fixedly installed on the rear outer side of the electronic component compartment and the front outer side of the first support plate, respectively. The inner sides of multiple support cups are fixedly installed on the outer sides of multiple support plates.
2. An air ultrasonic endoscope according to claim 1, wherein The wires connecting the battery, signal conversion board, ultrasonic probe, odometer wheel, air ultrasonic internal detector body, and ranging mechanism are all installed inside an insulating rubber tube, and a traction rope is fixedly installed inside the traction ring.
3. An air ultrasonic endoscope according to claim 1, wherein The sealing cup has a conical structure, with its outer diameter larger than that of the supporting cup and also larger than the inner diameter of the pipe being tested.
4. An air ultrasonic endoscope according to claim 1, wherein The outer diameters of the support cups, multiple support wheels, and multiple sets of odometer wheels are all the same.