A detection device for high-density semi-infinite long tubes

Abstract

The utility model provides a kind of detection device of high-density semi-infinite long pipe belongs to detection device technical field. Including pedestal, the both sides symmetry fixed with L-shaped fixing frame of pedestal, the end of two fixing frames is provided with fastening bolt for abutting high-density semi-infinite long pipe end two sides, and the middle part of pedestal is elastically installed with detection cylinder, one end of detection cylinder extends outside pedestal, and rotationally installed with rotating disc, the surface of rotating disc annular array has multiple detection probes for tightly high-density semi-infinite long pipe end face;Detection cylinder is connected with data cable away from rotating disc one end, and the end of data cable away from detection cylinder extends outside detection probe, and fixed with the joint for connecting signal analysis device, joint is elastically installed with protection cylinder outside. The utility model not only solves the problem of unstable coupling of traditional detection device, but also realizes the omnibearing detection to end face, protects key signal transmission component simultaneously, and overall use effect is good.

Description

Technical Field

[0001] This utility model relates to the field of detection device technology, and in particular to a detection device for a high-density semi-infinite tube. Background Technology

[0002] In the fields of petrochemicals, nuclear power, and energy equipment, regular inspection of high-density tube bundles (such as heat exchangers and steam generators) is crucial. These tube bundles often exhibit semi-infinite length characteristics, specifically, the inspection end is concentrated and exposed on the tube sheet, while the remaining portion extends several meters to tens of meters deep inside the equipment. To ensure the normal operation of the pipelines, regular inspection and maintenance are necessary.

[0003] Currently, guided wave detection technology is widely used, employing piezoelectric ceramic probes to excite ultrasonic guided waves for long-distance screening. However, fixed probe holders cannot adapt to different pipe diameters and are prone to skew under vibration, leading to coupling failure. Some solutions attempt to use multi-probe arrays, but lack rotation adjustment capabilities, making it difficult to cover the entire end face area, resulting in inconvenience.

[0004] Therefore, this application provides a detection device for a high-density semi-infinite tube to solve the above-mentioned technical problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a detection device for high-density semi-infinite tubes to solve the problems of existing detection devices being unable to stably couple different tube diameters, having difficulty covering the entire end face area, and having easily damaged signal connectors.

[0006] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0007] A detection device for a high-density semi-infinite tube includes a base, with L-shaped fixing frames symmetrically fixed on both sides of the base. Each end of the two fixing frames is provided with fastening bolts for abutting against the ends of the high-density semi-infinite tube. A detection cylinder is elastically installed in the middle of the base. One end of the detection cylinder extends out of the base and is rotatably mounted with a rotating disk. The surface of the rotating disk is arranged in a ring with multiple detection probes for closely adhering to the end face of the high-density semi-infinite tube.

[0008] A data cable is connected to one end of the detection cylinder away from the rotating disk. The other end of the data cable extends out of the detection probe and is fixed with a connector for connecting a signal analysis device. A protective sleeve is elastically installed outside the connector.

[0009] Optionally, the two fastening bolts are arranged facing each other and are threaded through the ends of the two fixing brackets respectively, and each of the two fastening bolts is fixed with a positioning plate that abuts against the end side surface of the high-density semi-infinite tube.

[0010] Optionally, a plurality of first springs are fixed inside the base, the first springs being connected to the detection cylinder and elastically pushing the detection cylinder outward from the base.

[0011] Optionally, the detection probe includes a piezoelectric ceramic probe, and the signal analysis device connected to the data cable includes an ultrasonic guided wave detector.

[0012] Optionally, the end of the data cable with the connector is also fixed with a base plate, and the protective sleeve is sleeved outside the connector and elastically mounted on the base plate.

[0013] Optionally, one end of the protective cylinder has an opening for the connector to extend out, and the other end is fixed with a plurality of guide posts, the guide posts penetrating the substrate, and a second spring is sleeved on the guide posts.

[0014] Optionally, one end of the second spring is fixed to the substrate, and the other end is fixed to the protective cylinder.

[0015] Compared with the prior art, this utility model has at least the following beneficial effects:

[0016] In the above scheme, thanks to the flexible installation of the detection cylinder and the rotatable rotating disk design, multiple detection probes can adaptively fit the end faces of different pipe diameters, ensuring coupling stability.

[0017] In the above solution, thanks to the flexible installation structure of the protective cylinder, mechanical damage to the signal connector in a confined space is effectively avoided, thus improving the reliability of detection.

[0018] In summary, this device not only solves the problem of unstable coupling in traditional detection devices, but also achieves omnidirectional detection of the end face, while protecting key signal transmission components, resulting in good overall performance. Attached Figure Description

[0019] The accompanying drawings, which are incorporated herein and form part of the specification, illustrate embodiments of the present invention and, together with the specification, further serve to explain the principles of the present invention and enable those skilled in the art to implement and use the present invention.

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the internal structure of the base of this utility model;

[0022] Figure 3 This is a schematic diagram of the data cable structure of this utility model;

[0023] Figure 4 For the present utility model Figure 3 An enlarged schematic diagram of the structure at point A in the middle.

[0024] [Figure Labels]

[0025] 1. Base; 2. Fixing frame; 3. Fastening bolts; 301. Positioning plate; 4. Detection cylinder; 401. First spring; 5. Rotating plate; 6. Detection probe; 7. Data cable; 701. Connector; 8. Protective cylinder; 801. Guide post; 802. Second spring; 9. Base plate.

[0026] As shown in the figure, specific structures and devices are marked in the figure to clearly illustrate the structure of the embodiment of this utility model. However, this is only for illustrative purposes and is not intended to limit this utility model to this specific structure, device and environment. Those skilled in the art can adjust or modify these devices and environments according to specific needs. Detailed Implementation

[0027] The following is a detailed description of the detection device for a high-density semi-infinite tube provided by this utility model, with reference to the accompanying drawings and specific embodiments. It should be noted that, to make the embodiments more detailed, the following embodiments are the best and preferred embodiments; those skilled in the art can also use other alternative methods to implement some known technologies; and the accompanying drawings are only for more specific description of the embodiments and are not intended to specifically limit this utility model.

[0028] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0029] Generally, terms can be understood at least partly from their use in context. For example, depending at least partly on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood not necessarily to convey an exclusive set of factors, but rather, alternatively, depending at least partly on the context, to allow for the presence of other factors that are not necessarily explicitly described.

[0030] It is understood that the meanings of “on”, “above”, and “above” in this utility model should be interpreted in the broadest manner, such that “on” not only means “directly on” something, but also includes the meaning of being “on” something with an intervening feature or layer, and that “above” or “above” not only means “on” something, but also includes the meaning of being “on” something without an intervening feature or layer.

[0031] Furthermore, spatially related terms such as “below,” “under,” “lower,” “above,” and “upper” are used herein for convenience to describe the relationship of one element or feature to one or more other elements or features, as illustrated in the accompanying drawings. Spatially related terms are intended to cover different orientations in the use or operation of the device other than those depicted in the accompanying drawings. The device may be oriented in other ways, and the spatially related descriptive terms used herein can be interpreted similarly.

[0032] like Figure 1-4 As shown, an embodiment of this utility model provides a detection device for a high-density semi-infinite tube, including a base 1 and a fixing frame 2. Wherein:

[0033] The base 1 can be made of high-strength aluminum alloy, and the surface is anodized to improve corrosion resistance. L-shaped fixing brackets 2 are symmetrically welded on both sides of the base 1. The fixing brackets 2 consist of a horizontal section and a vertical section. M12 threaded holes are opened at the ends of the vertical sections of the fixing brackets 2 to install fastening bolts 3, ensuring the thread connection strength of the fastening bolts 3.

[0034] The two fastening bolts 3 are arranged facing each other. After the threads of the fastening bolts 3 pass through the end of the fixing frame 2, a circular positioning plate 301 is welded to the end. A rubber pad can be provided on the surface of the positioning plate 301 to enhance the friction with the pipe wall and prevent scratching the pipe. In actual testing, the base 1 is placed on the end face of the high-density pipe, and the fastening bolts 3 on both sides are rotated to make the positioning plate 301 abut against the pipe wall, thus completing the fixing of the device.

[0035] like Figure 2 As shown, the detection cylinder 4 is elastically mounted in the center of the base 1 by fixing multiple first springs 401. The detection cylinder 4 can be made of stainless steel, with one end extending out of the base 1 and mounted on a rotating disk 5 via a deep groove ball bearing. Specifically, the deep groove ball bearing is a 6204 model, with its inner diameter interference-fitted with the outer diameter of the detection cylinder 4 and its outer diameter clearance-fitted with the inner hole of the rotating disk 5, ensuring that the rotating disk 5 can rotate freely around the axial direction of the detection cylinder 4.

[0036] Simultaneously, six detection probes 6 are arranged in a ring array on the surface of the rotating disk 5. The detection probes 6 are made of PZT-5 piezoelectric ceramic material, are cylindrical in shape, and have an excitation frequency set to 250kHz to match the ultrasonic wave propagation characteristics of the high-density tube. The detection probes 6 are attached to the surface of the rotating disk 5 with conductive adhesive and connected to the signal processing circuit inside the detection cylinder 4 via leads. The other end of the detection cylinder 4 is connected to a data cable 7.

[0037] Cooperate Figure 3 and Figure 4 As shown, the data cable 7 can specifically adopt a coaxial shielded structure. The inner conductor is a 1mm diameter tinned copper wire, the insulation layer is polytetrafluoroethylene (PTFE), the shielding layer is a tinned copper wire braided mesh, and the outer layer is wrapped with a PTFE sheath to enhance anti-interference capabilities. The data cable 7 can be three meters long to meet the cabling needs of most field tests. A base plate 9 is fixed to the end of the data cable 7, and multiple mounting holes are provided on the base plate 9. The end of the data cable 7 is equipped with a connector 701, which is a BNC type RF connector, and a protective sleeve is provided on the outside of the connector 701.

[0038] The protective cylinder 8 is cylindrical in shape, with an opening at one end for the connector 701 to extend out. The edge of the opening is chamfered to prevent scratching the cable. At least three guide posts 801 are welded and fixed to the other end. The guide posts 801 mate with mounting holes on the substrate 9, ensuring that the protective cylinder 8 can slide axially along the guide posts 801. A second spring 802 is fitted on the guide posts 801. One end of the second spring 802 is fixed to the substrate 9 by a snap ring, and the other end is fixed to the end face of the protective cylinder 8 by adhesive, forming an elastic buffer structure. When the detection device operates in a confined space, if the connector 701 is accidentally bumped, the protective cylinder 8 effectively prevents damage to the connector 701. When the connector 701 is plugged into a signal analysis device, such as an ultrasonic guided wave detector, the protective cylinder 8 will not cause interference due to its elastic expansion and contraction design.

[0039] The working principle provided by this utility model is as follows: When using the detection device for high-density semi-infinite tubes, first position the device on the end face of the tube to be tested, rotate the fastening bolt 3 to make the positioning plate 301 clamp the tube wall, and at this time the first spring 401 pushes the detection cylinder 4 to make the rotating plate 5 fit against the end face, so that the detection probe 6 elastically abuts against the end face to ensure the fitting effect.

[0040] Then, after starting the connected ultrasonic guided wave detector, manually rotate the rotating disk 5. The six detection probes 6 scan the entire end face in sequence, and the excited ultrasonic guided waves propagate along the pipe axis. The reflected signals are transmitted to the connected ultrasonic guided wave detector for analysis via the data cable 7. After filtering, amplifying, and performing spectrum analysis on the received signal, the detector displays the defect location and severity on the screen. After the inspection is completed, loosen the fastening bolts 3 to remove the device.

[0041] In summary, this device not only solves the problem of unstable coupling in traditional detection devices, but also achieves omnidirectional detection of the end face, while protecting key signal transmission components, resulting in good overall performance.

[0042] This utility model encompasses any substitutions, modifications, equivalent methods, and solutions made within the spirit and scope of this utility model. To provide the public with a thorough understanding of this utility model, specific details are described in detail in the following preferred embodiments; however, those skilled in the art will fully understand this utility model even without these detailed descriptions. Furthermore, to avoid unnecessary confusion regarding the essence of this utility model, well-known methods, processes, procedures, components, and circuits are not described in detail.

[0043] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A detection device for a high-density semi-infinite tube, comprising a base (1), characterized in that, The base (1) is symmetrically fixed with L-shaped fixing frames (2) on both sides. The ends of the two fixing frames (2) are provided with fastening bolts (3) for abutting against the ends of the high-density semi-infinite tube. The base (1) is elastically installed with a detection cylinder (4) in the middle. One end of the detection cylinder (4) extends out of the base (1) and is rotatably mounted with a rotating disk (5). The surface of the rotating disk (5) is arranged in a ring with multiple detection probes (6) for closely adhering to the end face of the high-density semi-infinite tube. The end of the detection cylinder (4) away from the rotating disk (5) is connected to a data cable (7). The end of the data cable (7) away from the detection cylinder (4) extends out of the detection probe (6) and is fixed with a connector (701) for connecting a signal analysis device. A protective cylinder (8) is elastically installed outside the connector (701).

2. The detection device for high-density semi-infinite tubes according to claim 1, characterized in that, The two fastening bolts (3) are arranged facing each other and are threaded through the ends of the two fixing brackets (2), and the two fastening bolts (3) are fixed with a positioning plate (301) that abuts against the side surface of the end of the high-density semi-infinite tube.

3. The detection device for high-density semi-infinite tubes according to claim 1, characterized in that, The base (1) has a plurality of first springs (401) fixed inside. The first springs (401) are connected to the detection cylinder (4) and elastically push the detection cylinder (4) out of the base (1).

4. The detection device for high-density semi-infinite tubes according to claim 1, characterized in that, The detection probe (6) includes a piezoelectric ceramic probe, and the signal analysis device connected to the data cable (7) includes an ultrasonic guided wave detector.

5. The detection device for high-density semi-infinite tubes according to claim 1, characterized in that, The data cable (7) is fixed to the end of the connector (701) and a base plate (9) is also fixed thereto. The protective sleeve (8) is sleeved on the connector (701) and is elastically installed on the base plate (9).

6. The detection device for high-density semi-infinite tubes according to claim 5, characterized in that, One end of the protective cylinder (8) is provided with an opening for the connector (701) to extend out, and the other end is fixed with a plurality of guide posts (801). The guide posts (801) penetrate the substrate (9), and a second spring (802) is sleeved on the guide posts (801).

7. The detection device for high-density semi-infinite tubes according to claim 6, characterized in that, One end of the second spring (802) is fixed to the substrate (9), and the other end is fixed to the protective cylinder (8).

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