Scanning device for detecting outer wall of pipeline of nuclear power plant

Abstract

The invention discloses a scanning device for nuclear power plant pipeline outer wall detection. The scanning device comprises a plurality of positioning mechanisms, a plurality of adjusting mechanisms, a plurality of guide mechanisms and a detection mechanism. According to the scanning device for nuclear power plant pipeline outer wall detection, the adjusting mechanism is used for adjusting the distance between the two adjacent positioning mechanisms, the multi-directional detection requirements of existing nuclear power plant pipelines can be met, assembling and disassembling can be fast, self-adaptive adjustment can be achieved according to the sizes of different nuclear power plant pipelines, the application range is widened, and adaptability is enhanced; various detection mechanisms commonly used in nuclear power plants can be carried through the positioning mechanism, and in addition, the guide mechanism abuts against the outer wall of the nuclear power plant pipeline and can move in the circumferential direction and the axial direction of the nuclear power plant pipeline, so that the detection mechanisms can comprehensively scan and detect the outer wall of the nuclear power plant pipeline.

Description

Technical Field

[0001] The invention relates to the field of nuclear power plant pipeline scanning and detection, and in particular to a scanning device for detecting the outer wall of a nuclear power plant pipeline. Background Art

[0002] In the nuclear power industry, metal pipelines are subject to corrosion, rupture and other damage due to high temperature and high pressure transportation and structural reasons, and internal defect detection is required to prevent leakage. The visual inspection methods and internal inspection methods currently used by nuclear power plants for pipelines cannot detect internal corrosion of pipelines in a timely and comprehensive manner. Generally, the integrity of the inside of the pipeline can only be checked during overhaul. Some special operations use ultrasonic point thickness measurement to carry out pipeline inspection status assessment, but it can only be carried out by random inspection and local inspection, and the inspection efficiency is low. For example, low-frequency electromagnetic detection technology and pulse eddy current detection technology can detect pipeline matrix corrosion under daily conditions and achieve good results.

[0003] In addition, the corrosion detection technology currently used on the outside of pipelines is mostly handheld detection equipment. Handheld devices usually require operators to directly contact the pipeline, which may pose a safety hazard in some environments (such as high altitude, small spaces, or places where harmful substances exist). Manual handheld detection is inefficient, especially in the detection of long-distance pipelines, which requires a lot of time and labor; handheld devices rely on the skills and experience of operators, and the detection results between different operators may vary greatly; the detection of the outer wall of the pipeline is easily affected by the external environment (such as temperature, humidity, noise, etc.), and handheld devices may not be able to maintain stable performance under these conditions. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a scanning device for detecting the outer wall of a nuclear power plant pipeline.

[0005] The technical solution adopted by the present invention to solve the technical problem is: constructing a scanning device for detecting the outer wall of a nuclear power plant pipeline, which includes multiple positioning mechanisms, multiple adjustment mechanisms, multiple guiding mechanisms and at least one detection mechanism;

[0006] The positioning mechanism and the adjusting mechanism are arranged along the circumferential direction of the nuclear power plant pipeline, and each two adjacent positioning mechanisms are connected by an adjusting mechanism, and each positioning mechanism is connected to the guiding mechanism;

[0007] The guide mechanism abuts against the outer wall of the nuclear power plant pipeline and can move along the circumferential direction and axial direction of the nuclear power plant pipeline. The adjustment mechanism is used to adjust the distance between two adjacent positioning mechanisms. The detection mechanism is installed on the positioning mechanism and is used to detect the nuclear power plant pipeline.

[0008] In some embodiments, each of the positioning mechanisms includes two positioning rings, a movable shaft, and a fixed shaft, and the two positioning rings are parallel and spaced apart;

[0009] The movable shaft and the fixed shaft are both connected to the two positioning rings, and the movable shaft and the fixed shaft are separately connected to the two ends of the positioning rings.

[0010] In some embodiments, the adjustment mechanism includes two connecting members, and the two connecting members are arranged in parallel and at intervals;

[0011] Each of the connecting parts is respectively provided with a fixing hole and an adjusting hole, the diameter of the fixing hole is consistent with the diameter of the fixed shaft, the adjusting hole is extended along the length direction of the connecting part, the fixed shaft is passed through the fixing hole, and the movable shaft is passed through the adjusting hole.

[0012] In some embodiments, the adjustment mechanism further includes two connecting rods, and the two connecting rods are parallel and spaced apart;

[0013] The movable axis of each positioning mechanism is connected to the fixed axis of an adjacent positioning mechanism via two connecting rods.

[0014] In some embodiments, the connecting rod is a threaded rod, and the connecting rod is threadedly connected to the moving shaft.

[0015] In some embodiments, the positioning mechanism further includes a spacer sleeve sleeved on the outer side of the movable shaft, and the outer diameter of the spacer sleeve is larger than the aperture of the adjustment hole.

[0016] In some embodiments, the guide mechanism includes a support frame detachably connected to the positioning ring and a universal wheel movably connected to the support frame, and the universal wheel abuts against the outer wall of the nuclear power plant pipeline.

[0017] In some embodiments, the number of the universal wheels is two, and the two universal wheels are symmetrically arranged with respect to the center plane of the support frame.

[0018] In some embodiments, the detection mechanism is connected to the positioning ring via a detection positioning frame, and the positioning ring is provided with a bar hole for installing the detection positioning frame.

[0019] In some embodiments, the scanning device also includes an auxiliary scanning rod mounted on the support frame.

[0020] The implementation of the present invention has the following beneficial effects: the scanning device for detecting the outer wall of a nuclear power plant pipeline is used to adjust the spacing between two adjacent positioning mechanisms through an adjustment mechanism, can meet the existing multi-directional detection requirements of nuclear power plant pipelines, can be quickly assembled and disassembled, can be adaptively adjusted according to the sizes of different nuclear power plant pipelines, expands the scope of application, enhances adaptability, and can carry various commonly used detection mechanisms in nuclear power plants through the positioning mechanism. In addition, it is abutted against the outer wall of the nuclear power plant pipeline through a guide mechanism and can move along the circumferential direction and axial direction of the nuclear power plant pipeline, so that the detection mechanism can comprehensively scan and detect the outer wall of the nuclear power plant pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work. In the drawings:

[0022] Figure 1 It is a schematic diagram of the overall structure of a scanning device for detecting the outer wall of a nuclear power plant pipeline in some embodiments of the present invention;

[0023] Figure 2 yes Figure 1 The enlarged schematic diagram of point A in the middle;

[0024] Figure 3 is a schematic diagram of the structure of a positioning ring in some embodiments of the present invention;

[0025] Figure 4 Schematic diagram of the structure of the connecting parts in some embodiments of the present invention. DETAILED DESCRIPTION

[0026] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific embodiments of the present invention are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "back", "up", "down", "left", "right", "longitudinal", "horizontal", "vertical", "horizontal", "top", "bottom", "inside", "outside", "head", "tail", etc. are based on the directions or positional relationships shown in the accompanying drawings, are constructed and operated in a specific direction, and are only for the convenience of describing the present technical solution, rather than indicating that the device or element referred to must have a specific direction, and therefore cannot be understood as a limitation to the present invention.

[0027] It should also be noted that, unless otherwise clearly specified and limited, the terms such as "installed", "connected", "connected", "fixed", "set" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. When an element is referred to as being "on" or "under" another element, the element can be "directly" or "indirectly" located on the other element, or there may be one or more intermediate elements. The terms "first", "second", "third", etc. are only for the convenience of describing the present technical solution, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third", etc. can explicitly or implicitly include one or more of the features. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] See also Figures 1 to 4 , is a scanning device for detecting the outer wall of a nuclear power plant pipeline in some embodiments of the present invention, which includes multiple positioning mechanisms 1, multiple adjustment mechanisms 2, multiple guide mechanisms 3 and at least one detection mechanism 4. The positioning mechanisms 1 and the adjustment mechanisms 2 are arranged along the circumferential direction of the nuclear power plant pipeline 5, and each two adjacent positioning mechanisms 1 are connected by an adjustment mechanism 2. Each positioning mechanism 1 is connected with a guide mechanism 3, which abuts against the outer wall of the nuclear power plant pipeline 5 and can move along the circumferential direction and axial direction of the nuclear power plant pipeline 5. The adjustment mechanism 2 is used to adjust the spacing between two adjacent positioning mechanisms 1. The detection mechanism 4 is installed on the positioning mechanism 1 and is used to detect the nuclear power plant pipeline 5. Among them, the number of the detection mechanism 4 can be one, and one detection mechanism 4 can be installed on one of the positioning mechanisms 1, or multiple detection mechanisms 4 are installed on different positioning mechanisms 1, which can be adjusted according to the actual application situation on site.

[0029] It can be understood that the scanning device for detecting the outer wall of the nuclear power plant pipeline is used to adjust the distance between two adjacent positioning mechanisms 1 through the adjustment mechanism 2, which can meet the existing nuclear power plant pipeline 5 multi-directional detection requirements, can be quickly assembled and disassembled, and can be adaptively adjusted according to the sizes of different nuclear power plant pipelines 5, thereby expanding the scope of application and enhancing adaptability. In addition, the positioning mechanism 1 can carry various detection mechanisms 4 commonly used in nuclear power plants. In addition, the guide mechanism 3 is used to abut on the outer wall of the nuclear power plant pipeline 5 and can move along the circumferential direction and axial direction of the nuclear power plant pipeline 5, so that the detection mechanism 4 can comprehensively scan and detect the outer wall of the nuclear power plant pipeline 5.

[0030] like Figure 2As shown, each positioning mechanism 1 includes two positioning rings 11, a movable shaft 12 and a fixed shaft 13. The two positioning rings 11 are parallel and spaced apart. The movable shaft 12 and the fixed shaft 13 are both connected to the two positioning rings 11, and the movable shaft 12 and the fixed shaft 13 are separately connected to the two ends of the positioning ring 11. The positioning ring 11 is roughly annular, with one side being an inner arc surface and the other side being an outer arc surface, which can better fit the outer wall of the nuclear power plant pipeline 5 and ensure that the detection mechanism 4 can operate stably on the outer wall of the nuclear power plant pipeline 5. In addition, the number of the positioning rings 11 can be increased or decreased according to the size of the nuclear power plant pipeline 5, so that the scanning device can be applied to nuclear power plant pipelines 5 of different sizes, increasing its versatility.

[0031] The detection mechanism 4 is connected to the positioning ring 11 through the detection positioning frame 41. Figure 3 As shown, the positioning ring 11 is provided with a bar hole 111 for installing the detection positioning frame 41. The setting of the bar hole 111 facilitates the installation and position adjustment of the detection mechanism 4. The detection mechanism 4 may include sensors, cameras and other detection components. The detection mechanism 4 is used to detect internal defects of the nuclear power plant pipeline 5.

[0032] like Figure 2 and Figure 4 As shown, the adjustment mechanism 2 includes two connecting members 21, which are parallel and spaced apart. Each connecting member 21 is provided with a fixing hole 211 and an adjusting hole 212. The diameter of the fixing hole 211 is consistent with the diameter of the fixed shaft 13. The adjusting hole 212 is extended along the length direction of the connecting member 21. The fixed shaft 13 is passed through the fixing hole 211, and the movable shaft 12 is passed through the adjusting hole 212. The adjustment mechanism 2 also includes two connecting rods 22, which are parallel and spaced apart. The movable shaft 12 of each positioning mechanism 1 is connected to the fixed shaft 13 of the adjacent positioning mechanism 1 through the two connecting rods 22. The connecting rod 22 is a threaded rod, and the connecting rod 22 is threadedly connected to the movable shaft 12. It can be understood that by setting the adjustment hole 212, the distance between the fixed axis 13 and the movable axis 12 can be changed, and then the distance between the fixed axis 13 and the movable axis 12 can be locked by the connecting rod 22, which can maintain stability and will not change the distance due to movement. At the same time, the pipe diameter adjustment capability is increased, which can adapt to more nuclear power plant pipelines 5 with different outer diameters.

[0033] Furthermore, the positioning mechanism 1 further comprises a spacer tube 14 sleeved on the outer side of the moving shaft 12, and the outer diameter of the spacer tube 14 is larger than the aperture of the adjustment hole 212. The spacer tube 14 can increase the stability of the connection of the moving shaft 12.

[0034] The guide mechanism 3 includes a support frame 31 detachably connected to the positioning ring 11 and a universal wheel 32 movably connected to the support frame 31, and the universal wheel 32 abuts against the outer wall of the nuclear power plant pipeline 5. In this embodiment, the support frame 31 is generally L-shaped and can be connected to the positioning ring 11 by bolts. There are two universal wheels 32, and the two universal wheels 32 are symmetrically arranged about the center plane of the support frame 31. The universal wheel 32 can adjust different heights by screwing in depth to adapt to different lifting heights of the detection mechanism 4, and the universal wheel 32 can enable the scanning device to move in multiple directions, increasing its mobility on the nuclear power plant pipeline 5.

[0035] The scanning device also includes an auxiliary scanning rod 6 installed on the support frame 31, and the auxiliary scanning rod 6 is used to assist the detection mechanism 4 in detection to obtain more accurate and comprehensive detection data.

[0036] Preferably, the scanning device is made of aluminum alloy as a whole and is sandblasted to remove impurities and oxide layers on the surface of the material, increase surface roughness, and help improve the adhesion of the coating or improve the wear resistance of the material.

[0037] In this embodiment, a driving motor can be installed on the support frame 31 to drive the entire scanning device to move along the nuclear power plant pipeline 5. A telescopic long rod can also be provided, which can be locked according to the required distance. The long rod has a connection interface with each support frame 31, so that scanning operations at high places can be realized.

[0038] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A scanning device for detecting the outer wall of a nuclear power plant pipeline, characterized in that: It comprises a plurality of positioning mechanisms (1), a plurality of adjustment mechanisms (2), a plurality of guide mechanisms (3) and at least one detection mechanism (4); The positioning mechanism (1) and the adjusting mechanism (2) are arranged along the circumferential direction of the nuclear power plant pipeline (5), and each two adjacent positioning mechanisms (1) are connected via an adjusting mechanism (2), and each positioning mechanism (1) is connected to the guiding mechanism (3); The guide mechanism (3) abuts against the outer wall of the nuclear power plant pipeline (5) and can move along the circumferential direction and the axial direction of the nuclear power plant pipeline (5); the adjustment mechanism (2) is used to adjust the distance between two adjacent positioning mechanisms (1); and the detection mechanism (4) is installed on the positioning mechanism (1) and is used to detect the nuclear power plant pipeline (5).

2. The scanning device for detecting the outer wall of a nuclear power plant pipeline according to claim 1, characterized in that: Each positioning mechanism (1) comprises two positioning rings (11), a movable shaft (12) and a fixed shaft (13), and the two positioning rings (11) are arranged in parallel and at intervals; The movable shaft (12) and the fixed shaft (13) are both connected to the two positioning rings (11), and the movable shaft (12) and the fixed shaft (13) are separately connected to the two ends of the positioning ring (11).

3. The scanning device for detecting the outer wall of a nuclear power plant pipeline according to claim 2, characterized in that: The adjustment mechanism (2) comprises two connecting members (21), and the two connecting members (21) are arranged in parallel and at intervals; Each of the connecting members (21) is respectively provided with a fixing hole (211) and an adjusting hole (212); the diameter of the fixing hole (211) is consistent with the diameter of the fixing shaft (13); the adjusting hole (212) is extended along the length direction of the connecting member (21); the fixing shaft (13) is passed through the fixing hole (211); and the movable shaft (12) is passed through the adjusting hole (212).

4. The scanning device for detecting the outer wall of a nuclear power plant pipeline according to claim 3, characterized in that: The adjustment mechanism (2) further comprises two connecting rods (22), wherein the two connecting rods (22) are arranged in parallel and at intervals; The movable shaft (12) of each positioning mechanism (1) is connected to the fixed shaft (13) of an adjacent positioning mechanism (1) via two connecting rods (22).

5. The scanning device for detecting the outer wall of a nuclear power plant pipeline according to claim 4, characterized in that: The connecting rod (22) is a threaded rod, and the connecting rod (22) is threadedly connected to the movable shaft (12).

6. The scanning device for detecting the outer wall of a nuclear power plant pipeline according to claim 4, characterized in that: The positioning mechanism (1) further comprises a spacer tube (14) sleeved on the outside of the movable shaft (12), wherein the outer diameter of the spacer tube (14) is greater than the aperture of the adjustment hole (212).

7. The scanning device for detecting the outer wall of a nuclear power plant pipeline according to claim 2, characterized in that: The guide mechanism (3) comprises a support frame (31) detachably connected to the positioning ring (11) and a universal wheel (32) movably connected to the support frame (31), wherein the universal wheel (32) abuts against the outer wall of the nuclear power plant pipeline (5).

8. The scanning device for detecting the outer wall of a nuclear power plant pipeline according to claim 7, characterized in that: There are two universal wheels (32), and the two universal wheels (32) are symmetrically arranged with respect to the center plane of the support frame (31).

9. The scanning device for detecting the outer wall of a nuclear power plant pipeline according to claim 2, characterized in that: The detection mechanism (4) is connected to the positioning ring (11) via a detection positioning frame (41), and the positioning ring (11) is provided with a bar hole (111) for installing the detection positioning frame (41).

10. The scanning device for detecting the outer wall of a nuclear power plant pipeline according to claim 7, characterized in that: The scanning device also includes an auxiliary scanning rod (6) mounted on the support frame (31).

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