Scanning device giving consideration to inner diameter circumferential weld and R angle area detection

Abstract

The invention provides a scanning device giving consideration to inner diameter circumferential weld and R-angle area detection, which comprises a body and an inner diameter R-angle area detection mechanism, and is characterized in that the body is provided with at least one inner diameter circumferential weld detection mechanism; the inner diameter R-angle area detection mechanism comprises a telescopic rod and an inner diameter R-angle area ultrasonic probe, the telescopic rod penetrates through the body, the two ends of the telescopic rod extend to the outer side of the body, the inner diameter R-angle area ultrasonic probe is installed at one end of the telescopic rod, and the other end of the telescopic rod is a driving end; wherein the inner diameter R-angle area ultrasonic probe has a contraction state and an opening state when the driving end extends in or is pulled out in the axial direction of the body, and in the contraction state, the inner diameter R-angle area ultrasonic probe gets close to the body, the circumferential size of the inner diameter R-angle area ultrasonic probe is decreased, and the inner diameter R-angle area ultrasonic probe extends into a target pipeline along with the body; in the open state, the inner diameter R-angle area ultrasonic probe is opened away from the body and moves to a welding seam in the inner diameter R-angle area for detection. The scanning device meets the scanning requirements of the small-pipe-diameter inner-diameter circumferential weld and the R-angle area.

Description

Technical Field

[0001] This invention relates to the field of nondestructive testing technology, specifically to a scanning device that can detect both inner diameter circumferential welds and R-angle areas. Background Technology

[0002] With the widespread application of nondestructive testing (NDT) technology, various structural parts are becoming increasingly complex, and the spatial constraints of application scenarios are also increasing, placing higher demands on ultrasonic probes and scanning devices. How to apply ultrasonic testing technology in confined spaces, such as the inner walls of small-diameter pipes, has become an important research direction in the field of ultrasonic testing in recent years.

[0003] The difficulty in inspecting the internal gaps of narrow pipes lies in:

[0004] First, the limited space inside the wall prevents thermal engineers from entering to conduct handheld scanning and inspection.

[0005] Second, if a scanning device is used to scan the inner wall of a pipe, how can a certain pressure coupling be maintained between the probe and the workpiece being tested?

[0006] Third, the R-corner region has a structure that is wider inside and narrower outside. How can the probe on the scanning device retract when it enters and then open up to couple the inner wall of the R-corner when it reaches the R-corner region?

[0007] Fourth, how to reduce the friction between the scanning device and the workpiece being tested, thereby reducing wear and increasing service life.

[0008] Currently, most scanning devices on the market are designed to inspect the outer surfaces of flat or cylindrical workpieces, but cannot inspect the inner walls of small-diameter pipes.

[0009] Based on this, the inventors of this application propose a scanning device that can detect both the inner diameter circumferential weld and the R-angle area, in order to solve one or more of the above-mentioned technical problems. Summary of the Invention

[0010] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art in the difficulty of inspecting the inner wall of small-diameter pipes, and to provide a scanning device that takes into account both the inner diameter circumferential weld and the R-angle area.

[0011] The present invention solves the above-mentioned technical problems through the following technical solution:

[0012] This invention provides a scanning device that can detect both inner diameter circumferential welds and R-angle areas, characterized in that it includes:

[0013] The main body is equipped with at least one inner diameter circumferential weld inspection mechanism.

[0014] An inner diameter radius (R-angle) region detection mechanism includes a telescopic rod and an ultrasonic probe for the inner diameter radius (R-angle) region. The telescopic rod passes through the main body and extends to the outside of the main body at both ends. The ultrasonic probe for the inner diameter radius (R-angle) region is installed at one end of the telescopic rod, and the other end of the telescopic rod is a drive end.

[0015] The ultrasonic probe in the inner diameter R-angle region has a retracted state and an open state when it is extended into or pulled out along the axis of the body at the drive end. In the retracted state, the ultrasonic probe in the inner diameter R-angle region moves towards the body and its circumferential size decreases, and it extends into the target pipe along with the body. In the open state, the ultrasonic probe in the inner diameter R-angle region moves away from the body and moves to the weld in the inner diameter R-angle region for inspection.

[0016] According to one embodiment of the present invention, at least one clearance groove is provided on the body, and the inner diameter circumferential weld detection mechanism is detachably installed in the clearance groove.

[0017] According to one embodiment of the present invention, at least one universal ball bearing is provided on the outer circumference of the body, and the universal ball bearing is at least partially located on the outer side of the body and one end is embedded in the body and rolledly connected to the body.

[0018] According to one embodiment of the present invention, the number of the inner diameter circumferential weld inspection mechanisms is two, and they are respectively located on opposite sides of the body.

[0019] According to one embodiment of the present invention, the telescopic rod includes a rotating section and a telescopic section, one end of the telescopic section is connected to the rotating section, and the other end is provided with a rotating handle;

[0020] The ultrasonic probe in the inner diameter R-angle region includes a mounting rod and at least one R-angle probe mounted on the mounting rod. One end of the mounting rod is inserted into the rotating section and is threadedly connected to the rotating section.

[0021] According to one embodiment of the present invention, the telescopic section includes at least two telescopic parts.

[0022] According to one embodiment of the present invention, the mounting rod is provided with a movable rod assembly, the movable rod assembly including a connecting rod and a movable rod, one end of the connecting rod being connected to the main body and the other end being rotatably connected to the movable rod, and one end of the movable rod being connected to the mounting rod;

[0023] The R-angle probe is mounted on the connecting rod. When the rotating handle is rotated, the mounting rod is rotated in or out along the axial direction of the rotating section, thereby increasing or decreasing the angle between the connecting rod and the movable rod, so as to drive the R-angle probe to open or retract.

[0024] According to one embodiment of the present invention, the number of R-angle probes is two, and they are respectively disposed on opposite sides of the mounting rod.

[0025] According to one embodiment of the present invention, the main body is provided with a limiting ring, which is sleeved on the outer periphery of the main body and is used to limit the position of the main body after the main body reaches the target position.

[0026] According to one embodiment of the present invention, the body is provided with a scale along its axial extension direction.

[0027] The positive and progressive effects of this invention are as follows:

[0028] This invention provides a scanning device for detecting both inner diameter circumferential welds and R-angle regions. It has an inner diameter circumferential weld detection mechanism and an inner diameter R-angle region detection mechanism. The inner diameter R-angle region ultrasonic probe in the inner diameter R-angle region detection mechanism has a retracted state and an open state, which allows it to reach a designated area in a narrow space for detection, thus meeting the detection requirements of small-diameter pipe inner walls. Attached Figure Description

[0029] The above and other features, properties and advantages of the present invention will become more apparent from the following description taken in conjunction with the accompanying drawings and embodiments, wherein:

[0030] Figure 1 This is a schematic diagram of the scanning device of the present invention that can detect both the inner diameter circumferential weld and the R-corner area.

[0031] Figure 2 for Figure 1 Exploded view;

[0032] Figure 3 This is a schematic diagram of the inner diameter circumferential weld detection status of the scanning device of the present invention, which takes into account both the detection of the inner diameter circumferential weld and the R-angle region.

[0033] Figure 4 This is a schematic diagram of the R-corner area detection status of the scanning device of the present invention, which takes into account both the inner diameter circumferential weld and the R-corner area detection.

[0034] 1. Body; 11. Inner diameter circumferential weld inspection mechanism; 12. Circumferential groove; 13. Universal ball bearing; 14. Limiting ring; 15. Scale;

[0035] 2. Inner diameter R-angle area detection mechanism; 21. Telescopic rod; 211. Rotating section; 212. Telescopic section; 213. Rotating handle; 214. Telescopic part; 22. Inner diameter R-angle area ultrasonic probe; 221. Mounting rod; 222. R-angle probe; 23. Movable rod assembly; 231. Connecting rod; 232. Movable rod;

[0036] 3. Target pipeline. Detailed Implementation

[0037] The present invention will be further described below with reference to specific embodiments and accompanying drawings. More details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention can obviously be implemented in many other ways different from those described herein. Those skilled in the art can make similar extensions and derivations based on actual application situations without departing from the spirit of the present invention. Therefore, the scope of protection of the present invention should not be limited by the content of this specific embodiment.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0039] Please refer to Figures 1 to 4 This invention proposes a scanning device that can detect both inner diameter circumferential welds and R-angle regions. It includes a body 1 and an inner diameter R-angle region detection mechanism 2. The body 1 has at least one inner diameter circumferential weld detection mechanism 11. The inner diameter R-angle region detection mechanism 2 includes a telescopic rod 21 and an inner diameter R-angle region ultrasonic probe 22. The telescopic rod 21 passes through the body 1 and extends to the outside of the body 1 at both ends. The inner diameter R-angle region ultrasonic probe 22 is installed at one end of the telescopic rod 21, and the other end of the telescopic rod 21 is a driving end. The inner diameter R-angle region ultrasonic probe 22 has a retracted state and an open state when the driving end extends into or out along the axial direction of the body 1. In the retracted state, the inner diameter R-angle region ultrasonic probe 22 moves towards the body 1, its circumferential size decreases, and it extends into the target pipe 3 along with the body 1. In the open state, the inner diameter R-angle region ultrasonic probe 22 opens away from the body 1 and moves to the weld in the inner diameter R-angle region for detection.

[0040] It can be seen that target pipe 3 can be, but is not limited to, pipes inside heat exchangers and pressure vessels, and is not limited here.

[0041] For small-diameter pipes, there are two types of welds that need to be inspected: the inner diameter circumferential weld and the inner wall radius (R-corner area). The circumferential dimension of the inner wall radius area is larger than that of the inner diameter circumferential weld, so traditional radius area inspection mechanisms cannot be used to inspect the inner wall of small-diameter pipes. Moreover, existing inspection mechanisms are mostly handheld, making it impossible for personnel to enter the small-diameter pipe and thus impossible to inspect the radius area welds and inner diameter circumferential welds within the small-diameter pipe.

[0042] In this invention, the main body 1 is provided with an inner diameter circumferential weld detection mechanism 11, which can meet the detection of inner diameter circumferential welds. It is also provided with an inner diameter R-angle region detection mechanism 2, wherein the inner diameter R-angle region ultrasonic probe 22 has a retracted state and an open state. In the retracted state, it can enter the small diameter pipe along with the main body 1. When it reaches the inner diameter circumferential weld, the inner diameter circumferential weld detection mechanism 11 can be used to detect the weld. When it reaches the inner diameter R-angle region, the inner diameter R-angle region ultrasonic probe 22 can be opened to detect the weld in the inner diameter R-angle region, thus meeting the detection of inner diameter circumferential welds and R-angle regions in small diameter pipes.

[0043] Reference Figure 1 and Figure 2 The main body 1 has at least one clearance groove 12, and the inner diameter circumferential weld inspection mechanism 11 can be detachably installed in the clearance groove 12.

[0044] The inner diameter circumferential weld inspection mechanism 11 can be connected to the body 1 through multiple threaded connectors. It can also be connected by bonding, snap-fit, or other methods, which are not limited here.

[0045] Specifically, at least one universal ball bearing 13 is provided on the outer periphery of the body 1. The universal ball bearing 13 is at least partially located on the outside of the body 1 and one end is embedded in the body 1 and is in rolling connection with the body 1.

[0046] The main body 1 is inserted into the target pipe 3. The universal ball bearing 13 can prevent the main body 1 from rubbing and wearing with the target pipe 3 during operation, thereby improving the service life of the main body 1.

[0047] Multiple universal ball bearings 13 can be set along the circumference of the body 1. The specific number is not limited and can be adjusted according to the length of the body 1 or design requirements.

[0048] In one embodiment, there are two inner diameter circumferential weld inspection mechanisms 11, which are located on opposite sides of the main body 1.

[0049] The number of inner diameter circumferential weld inspection mechanisms 11 is two. On the one hand, this can make the circumferential dimensions of the body 1 more uniform and avoid irregular rotation of a single inner diameter circumferential weld inspection mechanism 11 due to its own gravity. On the other hand, it can also improve the efficiency of weld inspection.

[0050] In some other embodiments, the number of inner diameter circumferential weld inspection mechanisms 11 may also be three, four, etc., and is not limited here.

[0051] The telescopic rod 21 of the inner diameter R-angle region detection mechanism 2 includes a rotating section 211 and a telescopic section 212. One end of the telescopic section 212 is connected to the rotating section 211, and the other end is connected to a rotating handle 213. The inner diameter R-angle region ultrasonic probe 22 includes a mounting rod 221 and at least one R-angle probe 222 mounted on the mounting rod 221. One end of the mounting rod 221 is inserted into the rotating section 211 and is threadedly rotatably connected to the rotating section 211.

[0052] Specifically, the telescopic section 212 includes at least two telescopic parts 214, so that the main body 1 can adapt to the inspection requirements of target pipes 3 of different lengths.

[0053] Furthermore, the mounting rod 221 is provided with a movable rod assembly 23, which includes a connecting rod 231 and a movable rod 232. One end of the connecting rod 231 is connected to the main body 1, and the other end is rotatably connected to the movable rod 232. One end of the movable rod 232 is connected to the mounting rod 221. The R-angle probe 222 is mounted on the connecting rod 231. When the handle 213 is rotated, the mounting rod 221 is axially rotated in or out along the rotating section 211, thereby causing the included angle between the connecting rod 231 and the movable rod 232 to increase or decrease, so as to drive the R-angle probe 222 to open or retract.

[0054] That is, when the handle 213 is turned, one end of the rotating section 211 rotates relative to the mounting rod 221. The movement of the mounting rod 221 along the axis of the body 1 will cause the connecting rod 231 and the movable rod 232 to rotate relative to each other, and the included angle between them will increase or decrease, thereby causing the R-angle probe 222 to open or retract.

[0055] Reference Figure 3 and Figure 4 When the main body 1 needs to reach the R-angle region within a small-diameter pipe, the R-angle probe 222 is first retracted by rotating the handle 213. This reduces the circumferential size of the main body 1, allowing it to enter the pipe. For details, please refer to... Figure 3 As the main body 1 extends, once the ultrasonic probe 22 in the inner diameter R-angle region reaches the target position, the handle 213 can be driven to open the R-angle probe 222, allowing for the inspection of the weld in the R-angle region. For details, please refer to... Figure 4 .

[0056] In one embodiment, there are two R-angle probes 222, which are located on opposite sides of the mounting rod 221.

[0057] Setting the number of R-angle probes 222 to two is to improve the detection efficiency of the R-angle area and to avoid the irregular rotation of a single R-angle probe 222 due to its own gravity, which would affect the detection effect.

[0058] In some other implementations, the number of R-angle probes 222 may also be three, four, etc., and is not limited here.

[0059] Please continue to refer to Figure 3 and Figure 4 The main body 1 is provided with a limiting ring 14, which is sleeved on the outer periphery of the main body 1 and is used to limit the position of the main body 1 after it reaches the target position.

[0060] The main body 1 extends into the target pipe 3. After reaching the target position, the position of the main body 1 is limited by the limiting ring 14 to prevent the main body 1 from displacing along its axial direction during the detection process, which would affect the detection accuracy.

[0061] Specifically, the main body 1 is provided with a scale 15 along its axial extension direction.

[0062] That is, the distance the body 1 extends can be determined by the scale 15 to ensure that the body 1 can accurately move the inner diameter circumferential weld inspection mechanism 11 and the inner diameter R-angle region ultrasonic probe 22 to the accurate position.

[0063] The limiting ring 14 can be divided into an upper ring and a lower ring, and the position of the body 1 is limited by the engagement of the upper and lower rings. Alternatively, an external thread can be provided on the outside of the body 1, and an internal thread can be provided inside the limiting ring 14, and the position of the body 1 can be limited by the threaded connection.

[0064] Alternatively, threaded connectors, such as bolts or screws, can be provided on the limiting ring 14. The movement of the body 1 can be restricted by one end of the bolt abutting against the outer end face of the body 1. The specific limiting method between the limiting ring 14 and the body 1 is not limited here.

[0065] In summary, the scanning device provided by this invention, which can detect both inner diameter circumferential welds and R-angle regions, solves the problem of limited inner wall space in small-diameter pipes, making it impossible for manual personnel to enter and perform handheld scanning inspections. By setting an inner diameter circumferential weld detection mechanism 11 and an inner diameter R-angle region detection mechanism 2 on the main body 1, the scanning of two types of welds can be satisfied simultaneously.

[0066] Among them, the ultrasonic probe 22 of the inner diameter R-angle region detection mechanism 2 has a retracted state and an open state, which makes it easier to insert into the target pipe 3 for scanning, and the scanning process is more convenient.

[0067] In the description of the embodiments of this application, unless otherwise expressly specified and limited, the technical terms such as "installation", "connection", "joining", and "fixing" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can also refer to mechanical connections. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0068] This application uses specific terms to describe embodiments of the application. Terms such as "an embodiment," "one embodiment," and / or "some embodiments" refer to a particular feature, structure, or characteristic associated with at least one embodiment of the application. Therefore, it should be emphasized and noted that references to "an embodiment," "one embodiment," or "an alternative embodiment" in different locations throughout this specification do not necessarily refer to the same embodiment. Furthermore, certain features, structures, or characteristics in one or more embodiments of the application can be appropriately combined.

[0069] While the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the invention. Any variations and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention, without departing from the scope of the invention, fall within the protection scope defined by the claims of the present invention.

Claims

1. A scanning device that simultaneously detects inner diameter circumferential welds and R-corner areas, characterized in that, include: The main body is equipped with at least one inner diameter circumferential weld inspection mechanism. An inner diameter radius (R-angle) region detection mechanism includes a telescopic rod and an ultrasonic probe for the inner diameter radius (R-angle) region. The telescopic rod passes through the main body and extends to the outside of the main body at both ends. The ultrasonic probe for the inner diameter radius (R-angle) region is installed at one end of the telescopic rod, and the other end of the telescopic rod is a drive end. The ultrasonic probe in the inner diameter R-angle region has a retracted state and an open state when it is extended into or pulled out along the axis of the body at the drive end. In the retracted state, the ultrasonic probe in the inner diameter R-angle region moves towards the body and its circumferential size decreases, and it extends into the target pipe along with the body. In the open state, the ultrasonic probe in the inner diameter R-angle region moves away from the body and moves to the weld in the inner diameter R-angle region for inspection.

2. The scanning device for detecting both inner diameter circumferential welds and R-corner areas according to claim 1, characterized in that, The main body is provided with at least one clearance groove, and the inner diameter circumferential weld detection mechanism can be detachably installed in the clearance groove.

3. The scanning device for detecting both inner diameter circumferential welds and R-corner areas according to claim 2, characterized in that, The outer circumference of the body is provided with at least one universal ball bearing, which is at least partially located on the outside of the body and one end is embedded in the body and rolledly connected to the body.

4. The scanning device for detecting both inner diameter circumferential welds and R-angle areas according to claim 2, characterized in that, The number of inner diameter circumferential weld inspection mechanisms is two, and they are located on opposite sides of the main body.

5. The scanning device for detecting both inner diameter circumferential welds and R-angle areas according to claim 1, characterized in that, The telescopic rod includes a rotating section and a telescopic section. One end of the telescopic section is connected to the rotating section, and the other end is connected to a rotating handle. The ultrasonic probe in the inner diameter R-angle region includes a mounting rod and at least one R-angle probe mounted on the mounting rod. One end of the mounting rod is inserted into the rotating section and is threadedly connected to the rotating section.

6. The scanning device for detecting both inner diameter circumferential welds and R-corner areas according to claim 5, characterized in that, The telescopic section includes at least two telescopic parts.

7. The scanning device for detecting both inner diameter circumferential welds and R-corner areas according to claim 5, characterized in that, The mounting rod is provided with a movable rod assembly, which includes a connecting rod and a movable rod. One end of the connecting rod is connected to the main body, and the other end is rotatably connected to the movable rod. One end of the movable rod is connected to the mounting rod. The R-angle probe is mounted on the connecting rod. When the rotating handle is rotated, the mounting rod is rotated in or out along the axial direction of the rotating section, thereby increasing or decreasing the angle between the connecting rod and the movable rod, so as to drive the R-angle probe to open or retract.

8. The scanning device for detecting both inner diameter circumferential welds and R-corner areas according to claim 5, characterized in that, The number of R-angle probes is two, and they are located on opposite sides of the mounting rod.

9. The scanning device for detecting both inner diameter circumferential welds and R-angle areas according to claim 1, characterized in that, The main body is provided with a limiting ring, which is sleeved on the outer periphery of the main body and is used to limit the position of the main body after it reaches the target position.

10. The scanning device for detecting both inner diameter circumferential welds and R-angle areas according to claim 9, characterized in that, The body is provided with a scale along its axial extension direction.

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