A switching probe device for detecting defects in a pipe weld

Abstract

The utility model discloses a kind of switching probe devices for detecting pipeline weld defects, including head comparison reflector, further comprising: at least three acquisition device bodies, to the side away from the head comparison reflector is set;Multiple adjusting telescopic mechanisms, between the head comparison reflector and the acquisition device body of one of close to the head comparison reflector and adjacent two acquisition device bodies are set, by the setting of head reflector, acquisition device body and adjusting telescopic mechanism, when detecting different pipelines, the equipment can form two states, one is circular arc type, the other is straight type, circular arc type can be wrapped 360 degree detection of pipeline, full coverage receives weld reflection wave, camber surface and the curvature of pipeline outer diameter are same, acoustic energy transmittance is high, detection accuracy is higher;Straight type can utilize head comparison reflector all azimuth detection pipeline connection weld place, judge weld defect, accuracy is relatively high, fast, positioning is accurate.

Description

Technical Field

[0001] This utility model relates to the field of pipeline inspection technology, specifically a switching probe device for detecting defects in pipeline welds. Background Technology

[0002] With the development of the natural gas industry, the transmission distance of natural gas is increasing, and the laying of long-distance natural gas pipelines is also gradually increasing. Natural gas supply pipelines are characterized by high pressure, large diameter, and long transmission distance. During their operation, pipelines may be exposed to corrosion, wear, and impact damage in the environment. Among these, the pipeline weld seams are relatively prone to wear and corrosion, leading to perforation and leakage. To avoid pipeline perforation, regular and specialized inspections of pipeline weld seams are necessary to detect weld defects as early as possible, thereby enabling safe monitoring of the natural gas pipeline's operating status and timely handling of defects to prevent leaks. Traditional flaw detection techniques have drawbacks such as complex testing instruments, low flexibility, inaccurate defect location, and difficulty in detecting weld defects, making it difficult to achieve rapid and effective detection of weld defects in natural gas pipelines. Therefore, we have designed a variable-switching probe device. The above content is only used to help understand the technical solution of this utility model and does not represent an admission that the above content is the closest prior art. Utility Model Content

[0003] The purpose of this utility model is to provide a switching probe device for detecting defects in pipe welds, so as to solve the problems mentioned in the background art. To achieve the above objective, this utility model provides the following technical solution: A switching probe device for detecting defects in pipe welds, including a head contrast reflector, and further comprising: At least three acquisition devices are positioned on the side away from the head-contrast reflector. Multiple adjustable telescopic mechanisms are provided between the head-contrast reflector, one of the acquisition devices near the head-contrast reflector, and two adjacent acquisition devices, for switching the overall shape of the head-contrast reflector and the acquisition device when detecting different pipes. The adjustable telescopic mechanism includes: Multiple rectangular rings are disposed between the head-contrast reflector, one of the acquisition devices near the head-contrast reflector, and two adjacent acquisition devices. Multiple telescopic fixing parts are provided between two adjacent rectangular rings.

[0004] Preferably, the telescopic part includes: A collar is fitted onto the rectangular ring; A sleeve, one end of which is fixedly mounted on a rectangular ring, and the other end of which is slidably mounted on a sliding rod, the end of which is away from the sleeve being fixed to another adjacent sleeve; A fixing element is disposed between the slide rod and the inner wall of the sleeve to limit the extension and retraction length of the telescopic part.

[0005] Preferably, the fastener includes: Multiple elastic protrusions are evenly distributed on the slide bar; A groove is provided on the inner wall of the sleeve to accommodate the elastic protrusion.

[0006] Preferably, the top of the head-contrast reflector is symmetrical and recessed in a stepped shape, with a detection hole provided on each step.

[0007] Preferably, the detection holes symmetrically arranged on the contrast reflector are conical on one side and cylindrical on the other.

[0008] Preferably, the acquisition device is provided with a housing, and the housing is equipped with a piezoelectric crystal and a damping block.

[0009] Compared with the prior art, the beneficial effects of this utility model are: This invention, through the design of a head reflector, a data acquisition device, and an adjustable telescopic mechanism, allows the device to operate in two states when inspecting different pipes: an arc-shaped state and a straight state. The arc-shaped state can encompass the pipe for 360-degree inspection, fully covering the weld reflection waves. The curvature of the arc surface is the same as that of the pipe's outer diameter, resulting in high sound energy transmittance and higher detection accuracy. The straight state utilizes the head to compare with the reflector and probe the pipe connection welds from all angles to identify weld defects, offering higher accuracy, faster speed, and more precise positioning. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the front structure of the arc-shaped detector of this utility model; Figure 3 This is a schematic diagram of the front structure of the straight-type detector of this utility model; Figure 4 This is a cross-sectional view of the adjustable telescopic mechanism of this utility model; Figure 5 This is a schematic diagram of the front of the head of the present invention facing the reflector; Figure 6 for Figure 4 Enlarged view of point A in the middle.

[0011] Reference numerals: 1-Contrast reflector; 11-Detection hole; 2-Collection device body; 3-Adjusting telescopic mechanism; 31-Rectangular ring; 32-Telescopic fixing part; 321-Collar ring; 322-Sleeve; 323-Slide rod; 324-Elastic protrusion; 325-Groove; 4-Housing; 41-Piezoelectric crystal; 42-Damping block; 5-Threaded sleeve. Detailed Implementation

[0012] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0013] Please see Figure 1-6 This utility model provides a technical solution: a switching probe device for detecting defects in pipe welds, including a head contrast reflector 1, and further comprising: At least three acquisition device bodies 2 are arranged on the side away from the head contrast reflector 1. The acquisition device bodies 2 are used to conduct ultrasonic waves and can collect emitted waves in a concentrated manner. The head contrast reflector 1 and the acquisition device bodies 2 both have the function of conducting and receiving ultrasonic waves and can be used separately or simultaneously. Multiple adjustable telescopic mechanisms 3 are arranged between the head-contrast reflector 1 and one of the acquisition device bodies 2 near the head-contrast reflector 1 and two adjacent acquisition device bodies 2, for switching the overall shape of the head-contrast reflector 1 and the acquisition device body 2 when detecting different pipes, so as to fit different types of pipes and detect them. The adjustable telescopic mechanism 3 includes: Multiple rectangular rings 31 are disposed between the head contrast reflector 1 and one of the acquisition device bodies 2 near the head contrast reflector 1 and two adjacent acquisition device bodies 2, wherein the rectangular ring near the side of the contrast reflector 1 and the acquisition device 2 is fixed thereon by a connecting rod. Multiple telescopic fixing parts 32 are provided between two adjacent rectangular rings 31.

[0014] In addition, the telescopic part includes: A collar 321 is fitted onto the rectangular ring 31; The sleeve 322 has one end fixedly mounted on the rectangular ring 31, and the other end slidably mounted on a sliding rod 323. The end of the sliding rod 323 away from the sleeve 322 is fixed to another adjacent sleeve 321. A fixing element is provided between the slide rod 323 and the inner wall of the sleeve 322 to limit the extension and retraction length of the telescopic part.

[0015] Meanwhile, the fastener includes: A plurality of elastic protrusions 324 are evenly arranged on the slide bar 323; A groove 325 is provided on the inner wall of the sleeve 322 to fit the elastic protrusion 324.

[0016] The top of the head-contrast reflector 1 is symmetrical and recessed in a stepped shape, with a detection hole 11 provided on each step.

[0017] In addition, the detection holes 11 symmetrically arranged on the contrast reflector are conical on one side and cylindrical on the other side. In practical applications, the detection through the detection holes 11 of different shapes on both sides will form different detection waveforms, thereby generating different detection data for comparison, thus improving the accuracy of the data.

[0018] Among them, a corrugated pipe 5 is provided between the head contrast reflector 1 and one of the acquisition device bodies 2 near the head contrast reflector 1 and between two adjacent acquisition device bodies 2, for the adjustment telescopic mechanism 3 to wrap and protect, and can adapt to the shape of the adjustment telescopic mechanism 3.

[0019] Finally, a housing 4 is provided on the acquisition device body 2. The housing 4 is equipped with a piezoelectric crystal 41 and a damping block 42. The piezoelectric crystal 41 is used to convert the ultrasonic signals collected by the head reflector and the acquisition device body 2 into electrical signals for transmission to the host. The damping block 42 is used to reduce the vibration energy of the piezoelectric crystal 41, shorten the emission pulse width, and improve the flaw detection resolution. In addition, the housing 4 is generally installed on the penultimate acquisition device body 2 to better receive reflected ultrasonic waves, resulting in higher detection efficiency, higher accuracy, and more precise positioning.

[0020] When inspecting different pipelines, the device can form two states: an arc shape and a straight shape. The arc shape can cover the pipeline for 360-degree inspection, fully receiving the reflected waves from the weld. The curvature of the arc surface is the same as that of the pipeline's outer diameter, resulting in high sound energy transmittance and higher inspection accuracy. The straight shape can use the head to compare the reflector 1 to detect the pipeline connection weld from all directions. Based on the echo energy of the cylindrical and conical holes of the set detection holes 11 as a reference value, the device compares the echo reflection state after the ultrasonic wave is incident on the weld to determine weld defects. It has higher accuracy, faster speed, and more accurate positioning. During adjustment, the arc shape allows the device to be directly attached to the pipe. The device can be adaptively formed into an arc shape with the curvature by adjusting the telescopic mechanism 3. During the formation, the sleeve 322 and slide rod 323 between two adjacent rectangular rings 31 in the telescopic mechanism 3 will form different lengths. Then, multiple elastic protrusions 324 will be inserted into the groove 325 to fix its length, thereby fixing its length within a certain external force range.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A switching probe device for detecting defects in pipe welds, comprising a head contrast reflector (1), characterized in that, Also includes: At least three acquisition device bodies (2) are arranged on the side away from the head contrast reflector (1); Multiple adjustable telescopic mechanisms (3) are provided between the head contrast reflector (1) and one of the acquisition device bodies (2) near the head contrast reflector (1) and two adjacent acquisition device bodies (2) to switch the overall shape of the head contrast reflector (1) and the acquisition device body (2) when detecting different pipes. The adjustable telescopic mechanism (3) includes: Multiple rectangular rings (31) are disposed between the head-contrast reflector (1) and one of the acquisition device bodies (2) near the head-contrast reflector (1) and two adjacent acquisition device bodies (2); Multiple telescopic fixing parts (32) are provided between two adjacent rectangular rings (31).

2. The switching probe device for detecting defects in pipe welds according to claim 1, characterized in that, The telescopic part includes: A collar (321) is fitted onto the rectangular ring (31); The sleeve (322) is fixed at one end on the rectangular ring (31), and a sliding rod (323) is slidably provided at the other end. The end of the sliding rod (323) away from the sleeve (322) is fixed on another adjacent collar (321). A fixing element is provided between the slide rod (323) and the inner wall of the sleeve (322) to limit the extension and retraction length of the telescopic part.

3. The switching probe device for detecting defects in pipeline welds according to claim 2, characterized in that, The fastener includes: Multiple elastic protrusions (324) are evenly arranged on the slide bar (323); A groove (325) is provided on the inner wall of the sleeve (322) to fit the elastic protrusion (324).

4. The switching probe device for detecting defects in pipe welds according to claim 1, characterized in that, The top of the head contrast reflector (1) is symmetrical and recessed in a stepped shape, and each step is provided with a detection hole (11).

5. A switching probe device for detecting defects in pipe welds according to claim 4, characterized in that, The detection holes (11) symmetrically arranged on the contrast reflector are conical on one side and cylindrical on the other.

6. A switching probe device for detecting defects in pipe welds according to claim 1, characterized in that, The acquisition device body (2) is provided with a housing (4), and the housing (4) is equipped with a piezoelectric crystal (41) and a damping block (42).

Images