Detection device for sleeved rotor impeller of nuclear power plant

Abstract

The utility model discloses a nuclear power plant sleeved rotor impeller detection device which comprises a base, an X-direction moving mechanism, a Y-direction moving mechanism, a Z-direction moving mechanism and a detection mechanism. The X-direction moving mechanism is installed on the base and comprises an X-direction guide rail, a first sliding table and a first driving assembly. The Y-direction moving mechanism comprises a connecting frame, a Y-direction guide rail, a second sliding table and a second driving assembly; the connecting frame is connected with the two first sliding tables, the Y-direction guide rail is installed on the connecting frame, the second sliding table is movably installed on the Y-direction guide rail, and the second driving assembly is connected with the second sliding table to drive the second sliding table to move along the Y-direction guide rail; the Z-direction moving mechanism is connected with the second sliding table, the detection mechanism is connected with the Z-direction moving mechanism, and the detection mechanism comprises a rotating assembly and a detection assembly connected with the rotating assembly. Compared with manual scanning, the detection device for the sleeved rotor impeller of the nuclear power plant is simpler and more convenient to work, the labor cost can be saved, and the detected data are more accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power, in particular to a set rotor impeller detection device for a nuclear power plant. Background Art

[0002] The steam turbine is the key equipment of the entire nuclear power plant power generation device and the largest rotating component in the entire conventional island. The steam turbine is mainly composed of a high-pressure cylinder and a low-pressure cylinder. The turbine rotor and blades in the entire rotating device are in long-term high-speed operation. The blade roots, blades, and disks are subjected to high temperature, high pressure, huge centrifugal force, steam bending stress, exciting force, fatigue corrosion, vibration, and water drop erosion in the wet steam area. The main failure forms that are prone to occur are stress corrosion cracks and fatigue cracks. The impeller of the red sleeve rotor is mounted on the main shaft. The centrifugal force causes the inner hole of the impeller to increase, so that there may be a gap between the impeller and the main shaft, and an interference fit is required: if the interference is too small, it cannot ensure that the impeller and the main shaft are not loose at the working speed. The larger the interference, the greater the assembly stress of the inner hole, which may cause the inner hole to crack during assembly.

[0003] At present, manual scanning is usually used to detect the surface condition of the impeller. However, the impellers are close to each other, the space between the two-stage discs is extremely narrow, blades are installed on the outer edge of the disc, the movable space of the detection equipment is small, and human hands may not be able to reach the detection position. Manual scanning may also result in missed detection. Utility Model Content

[0004] The utility model constructs a nuclear power plant set rotor impeller detection device, comprising a base, an X-direction moving mechanism, a Y-direction moving mechanism, a Z-direction moving mechanism and a detection mechanism;

[0005] The X-direction moving mechanism is installed on the base, and the X-direction moving mechanism includes two X-direction guide rails arranged parallel to each other, a first slide movably installed on each of the X-direction guide rails, and a first driving component connected to each of the first slides to drive the first slide to move along the X-direction guide rails;

[0006] The Y-direction moving mechanism comprises a connecting frame, a Y-direction guide rail, a second slide and a second driving assembly; the connecting frame connects the two first slides, the Y-direction guide rail is mounted on the connecting frame, the second slide is movably mounted on the Y-direction guide rail, and the second driving assembly is connected to the second slide to drive the second slide to move along the Y-direction guide rail;

[0007] The Z-direction moving mechanism is connected to the second slide, the detection mechanism is connected to the Z-direction moving mechanism, and the detection mechanism includes a rotating component and a detection component connected to the rotating component.

[0008] In some embodiments, each of the first slides is provided with a first mounting plate, and the first mounting plate is provided with a first slider connected to the X-guide rail;

[0009] The X-axis moving mechanism further comprises a first tooth row mounted on the base and arranged parallel to each of the X-axis guide rails;

[0010] Each of the first driving assemblies includes a first driving motor, which is mounted on the first mounting plate. An output end of the first driving motor is provided with a first driving gear meshing with the first gear row.

[0011] In some embodiments, each of the first mounting plates is further provided with a plurality of first sensors.

[0012] In some embodiments, a first limit block is provided at both ends of each X-guide rail in the length direction.

[0013] In some embodiments, at least one of the first slides is connected to a first drag chain.

[0014] In some embodiments, the second slide table is provided with a second mounting plate, and the second mounting plate is provided with a second slider connected to the Y guide rail;

[0015] The Y-axis moving mechanism further comprises a second tooth row mounted on the connecting frame and arranged parallel to the Y-axis guide rail;

[0016] The second driving assembly includes a second driving motor, which is mounted on the second mounting plate, and an output end of the second driving motor is provided with a second driving gear meshing with the second gear row.

[0017] In some embodiments, the number of the Y-guide rails is at least two;

[0018] At least two of the Y-guide rails are arranged in parallel.

[0019] In some embodiments, a plurality of second sensors are further disposed on the second mounting plate.

[0020] In some embodiments, second limit blocks are respectively provided at both ends of the connecting frame in the length direction.

[0021] In some embodiments, a limiting portion is further provided on the second mounting plate;

[0022] An anti-collision block is provided on the connecting frame on the moving path of the second slide.

[0023] In some embodiments, the Y-axis moving mechanism further includes a second drag chain connected to the second slide.

[0024] In some embodiments, the Z-direction moving mechanism includes a first Z-direction moving module and a second Z-direction moving module connected to each other, and the first Z-direction moving module is connected to the second slide;

[0025] The rotating assembly can be movably mounted on the second Z-direction moving module.

[0026] In some embodiments, the rotating assembly includes a bracket and a rotating motor;

[0027] The bracket is movably mounted on the second Z-direction movable module, the rotary motor is arranged on the bracket, and the rotary rod of the rotary motor is connected to the detection assembly.

[0028] In some embodiments, the detection assembly includes a cylinder, a fixture, and a detector;

[0029] The cylinder is connected to the rotating rod, the telescopic rod of the cylinder is connected to the clamp, and the detector is installed in the clamp.

[0030] In some embodiments, the detector comprises an ultrasound probe.

[0031] In some embodiments, the nuclear power plant set rotor impeller detection device further includes two support mechanisms arranged in parallel and at intervals, each of the support mechanisms including a support frame, a driving wheel and a driven wheel;

[0032] The driving wheel is installed on the supporting frame, the driven wheel is installed on the shaft of the nuclear power plant rotor, and the driven wheel is connected to the driving wheel.

[0033] The implementation of the utility model has the following beneficial effects: compared with manual scanning, the nuclear power plant rotor impeller detection device is easier to operate, can save labor costs, and the detection data is more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the technical solution of the utility model, the utility model 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 utility model, and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work. In the drawings:

[0035] Figure 1 This is one of the application schematic diagrams of the nuclear power plant set rotor impeller detection device in some embodiments of the utility model;

[0036] Figure 2 This is the second application schematic diagram of the nuclear power plant set rotor impeller detection device in some embodiments of the utility model;

[0037] Figure 3 This is the third application schematic diagram of the nuclear power plant set rotor impeller detection device in some embodiments of the utility model;

[0038] Figure 4 It is a structural schematic diagram of a nuclear power plant set rotor impeller detection device in some embodiments of the utility model;

[0039] Figure 5 It is one of the structural details of the X-axis moving mechanism in some embodiments of the utility model;

[0040] Figure 6 This is the second structural detail diagram of the X-axis moving mechanism in some embodiments of the utility model;

[0041] Figure 7 It is a structural detail diagram of the Y-direction moving mechanism in some embodiments of the utility model;

[0042] Figure 8 It is a structural detail diagram of the detection mechanism in some embodiments of the utility model. DETAILED DESCRIPTION

[0043] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, the specific implementation methods 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.

[0044] 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 utility model can be understood according to the specific circumstances.

[0045] In the following description, specific details such as specific system structures and technologies are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention can also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to avoid unnecessary details that hinder the description of the present invention.

[0046] See also Figures 1 to 8 The utility model shows a nuclear power plant rotor impeller detection device, which includes a base 10, an X-axis moving mechanism 20, a Y-axis moving mechanism 30, a Z-axis moving mechanism 40 and a detection mechanism 50.

[0047] Combination Figures 4 to 6 As shown, in some embodiments, the X-axis moving mechanism 20 is installed on the base 10, and the X-axis moving mechanism 20 includes two X-axis guide rails 21 arranged parallel to each other, and a first slide 22 movably installed on each X-axis guide rail 21, and a first driving component 23 connected to each first slide 22 to drive the first slide 22 to move along the X-axis guide rail 21.

[0048] Combination Figure 4 and Figure 7As shown, in some embodiments, the Y-axis moving mechanism 30 includes a connecting frame 31, a Y-guide rail 32, a second slide 33 and a second driving assembly 34; the connecting frame 31 connects the two first slides 22, the Y-guide rail 32 is installed on the connecting frame 31, the second slide 33 is movably installed on the Y-guide rail 32, and the second driving assembly 34 is connected to the second slide 33 to drive the second slide 33 to move along the Y-guide rail 32.

[0049] Combination Figure 4 and Figure 8 As shown, the Z-axis moving mechanism 40 is connected to the second slide 33 , and the detection mechanism 50 is connected to the Z-axis moving mechanism 40 . The detection mechanism 50 includes a rotating component 51 and a detection component 52 connected to the rotating component 51 .

[0050] It can be understood that the X-axis moving mechanism 20, the Y-axis moving mechanism 30, and the Z-axis moving mechanism 40 can realize the displacement of the detection mechanism 50 in three directions: X-axis, Y-axis, and Z-axis to adjust the position of the detection mechanism 50. The detection component 52 can detect the surface of the nuclear power plant's rotor impeller 101, etc.

[0051] Combination Figure 5 and Figure 6 As shown, in some embodiments, the X direction is the length direction (or axial direction) of the nuclear power plant suit rotor 100, and the X-guide rail 21 is extended along the length direction of the nuclear power plant suit rotor 100. One or more X-guide rails 21 can be provided.

[0052] Each first slide 22 is provided with a first mounting plate 221, on which a first slider 222 connected to the X-guide rail 21 is provided. The first slider 222 can be movably mounted on the X-guide rail 21, and the number of the first slider 222 can be one, two or any other number.

[0053] The X-axis moving mechanism 20 further includes a first tooth row 24 mounted on the base 10 and arranged parallel to each X-axis guide rail 21 .

[0054] Each first drive assembly 23 includes a first drive motor 231, which is mounted on the first mounting plate 221, and an output end of the first drive motor 231 is provided with a first drive gear 232 meshing with the first gear row 24. For example, the first drive motor 231 may be arranged on the upper surface of the first mounting plate 221, the output end of the first drive motor 231 is passed through the first mounting plate 221, and the output end of the first drive motor 231 is provided with the first drive gear 232, and the first drive motor 231 may be a planetary reducer, and the model may be TB90.

[0055] like Figure 6As shown, in some embodiments, each first mounting plate 221 is further provided with a plurality of first sensors 25, and the first sensor 25 can be connected to the lower side of the first mounting plate 221 through a mounting bracket, and the first sensor 25 is used to detect the moving speed, moving position and other information of the first slide 22. The first sensor 25 can be set to one or more, and the first sensor 25 can be an optional proximity switch, and the model can be TL-Q5MC1.

[0056] In some embodiments, first limit blocks 211 are disposed at both ends of each X-guide rail 21 in the length direction to prevent the first slide 22 from escaping from the X-guide rail 21 .

[0057] In some embodiments, at least one first slide 22 is connected to a first drag chain 26 , so that the movement of the first slide 22 is more stable. Of course, two first slides 22 can each be connected to a first drag chain 26 .

[0058] like Figure 7 As shown, in some embodiments, the second slide 33 is provided with a second mounting plate 331, and the second mounting plate 331 is provided with a second slider 332 connected to the Y guide rail 32, and the second slider 332 can be movably mounted on the Y guide rail 32, and the number of the second sliders 332 can be one, two, or any other number. The Y direction here is a direction perpendicular to the X direction on the plane. Preferably, the number of the Y guide rails 32 is at least two; at least two Y guide rails 32 are arranged in parallel.

[0059] The Y-direction moving mechanism 30 further includes a second gear row 35 mounted on the connecting frame 31 and arranged parallel to the Y-direction guide rail 32; the second driving assembly 34 includes a second driving motor 341, the second driving motor 341 is mounted on the second mounting plate 331, and the output end of the second driving motor 341 is provided with a second driving gear 342 meshing with the second gear row 35. For example, the second driving motor 341 can be arranged on the upper surface of the second mounting plate 331, the output end of the first driving motor 231 is passed through the second mounting plate 331, and the output end of the second driving motor 341 is provided with the second driving gear 342, and the second driving motor 341 can be a planetary reducer, and the model can be TB90.

[0060] In some embodiments, a plurality of second sensors 36 are further provided on the second mounting plate 331. The second sensor 36 may be connected to the lower side of the second mounting plate 331 through a connecting bracket, and the second sensor 36 is used to detect the moving speed, moving position and other information of the second slide 33. The second sensor 36 may be provided with one or more, and the second sensor 36 may be a proximity switch, and the model may be TL-Q5MC1.

[0061] Combination Figure 4and Figure 7 As shown, in some embodiments, a limiting portion 333 is further provided on the second mounting plate 331 ; and an anti-collision block 37 is provided on the connecting frame 31 on the moving path of the second slide 33 .

[0062] Combination Figure 4 As shown, in some embodiments, second limit blocks 311 are respectively provided at both ends of the connecting frame 31 in the length direction to prevent the second slide 33 from escaping from the Y-direction guide rail 32 .

[0063] Combination Figure 7 As shown, in some embodiments, the Y-axis moving mechanism 30 further includes a second drag chain 38 connected to the second slide 33, so that the movement of the second slide 33 is more stable.

[0064] Combination Figure 4 and Figure 8 As shown, in some embodiments, the Z-direction moving mechanism 40 includes a first Z-direction moving module 41 and a second Z-direction moving module 42 connected to each other, the first Z-direction moving module 41 is connected to the second slide 33; the rotating assembly 51 is movably mounted on the second Z-direction moving module 42. The first Z-direction moving module 41 and the second Z-direction moving module 42 can be standard screw-type slides, and the model can be FHC175-PD-007.

[0065] In some embodiments, the rotating assembly 51 includes a bracket 511 and a rotating motor 512. The bracket 511 is movably mounted on the second Z-direction moving module 42. The rotating motor 512 is disposed on the bracket 511, and a rotating rod 5121 of the rotating motor 512 is connected to the detection assembly 52. ​​The rotating motor 512 can be a servo motor, which has high precision and forward and reverse functions.

[0066] In some embodiments, the detection assembly 52 includes a cylinder 521, a fixture 522, and a detector 523; the cylinder 521 is connected to the rotating rod 5121, the telescopic rod 5211 of the cylinder 521 is connected to the fixture 522, and the detector 523 is installed in the fixture 522. In some embodiments, the detector 523 includes an ultrasonic probe. Of course, the detector 523 includes but is not limited to a conventional ultrasonic probe, a phased array probe, a TOFD probe, etc.

[0067] Among them, the rotating motor 512 can drive the detection detector 523 to rotate at any angle or direction, and it has two functions: 1. The rotating detector 523 allows it to enter along the narrow space between the nuclear power plant set rotor impellers 101. After reaching the specified height, the rotating motor 512 can be reversed to allow the detector 523 to restore the detection direction in the gap between the nuclear power plant set rotor impellers 101; 2. When the coupling effect of the detector 523 is not good or the detector 523 needs to be deflected, the position of the detector 523 can be accurately adjusted by the rotating motor 512 to ensure the best detection signal.

[0068] Among them, the detector 523 can realize the compression action in a limited space through the cylinder 521, thereby ensuring the coupling of the detector 523 and ensuring the adaptability to the curved surface structure of the side wall of the nuclear power plant's rotor impeller 101. The detector 523 can detect the interior and sleeve structure cross-section of the nuclear power plant's rotor impeller 101 through ultrasound to identify defects such as cracks.

[0069] like Figures 1 to 3 As shown, in some embodiments, the nuclear power plant set rotor impeller detection device may also include two support mechanisms 60 arranged in parallel and spaced apart, each support mechanism 60 includes a support frame 61, a driving wheel 62 and a driven wheel 63; the driving wheel 62 is installed on the support frame 61, and the driven wheel 63 is installed on the axis of the nuclear power plant set rotor 100, and the driven wheel 63 is connected to the driving wheel 62, and the rotation of the driving wheel 62 can drive the driven wheel 63 to rotate, and then drive the entire nuclear power plant set rotor 100 to rotate. Preferably, a motor drive control device is provided in the support frame 61 to drive the driving wheel 62 to rotate, and the driven wheel 63 can be connected to an encoder to measure information such as the rotation distance and angle of the nuclear power plant set rotor 100.

[0070] In some embodiments, the nuclear power plant rotor impeller detection device may further include a PLC controller, which may be connected to the X-axis moving mechanism 20, the Y-axis moving mechanism 30, the Z-axis moving mechanism 40 and the electrical equipment in the detection mechanism 50 by wire or wireless means.

[0071] See also Figures 1 to 3 The application of the nuclear power plant rotor impeller detection device is as follows:

[0072] a. Move the Y-axis moving mechanism 30 to move the detection mechanism 50 to a safe area away from the nuclear power plant set rotor impeller 101.

[0073] b. Move the X-axis moving mechanism 20 so that the detection mechanism 50 reaches the first detection position (such as Figure 3 The detection position of the leftmost nuclear power plant rotor impeller 101).

[0074] c. Move the Y-axis moving mechanism 30 to enter below the first detection position, start the rotating motor 512, and adjust the angle of the detector 523 to penetrate into the gap between the rotor impeller 101 of the nuclear power plant set.

[0075] d. Raise the Z-direction moving mechanism 40, insert the detector 523 into the gap space of the nuclear power plant set rotor impeller 101, start the rotating motor 512, point the detector 523 to the contour surface of the nuclear power plant set rotor impeller 101, and push the detector 523 to the side wall of the nuclear power plant set rotor impeller 101 through the cylinder 521.

[0076] e. The entire nuclear power plant suit rotor 100 is rotated in cooperation with the driving wheel 62 and the driven wheel 63 to achieve detection of the detector 523 along the inner surface of the gap of the nuclear power plant suit rotor impeller 101.

[0077] f. After the detection is completed, the detector 523 is retracted by the cylinder 521, and the rotating motor 512 rotates the detector 523 to the exit position.

[0078] g. Lower the Z-axis moving mechanism 40 and move the Y-axis moving mechanism 30 to a safe area away from the blades. Repeat the above steps at other locations to complete the inspection.

[0079] Compared with manual scanning, the nuclear power plant rotor impeller inspection device is easier to operate, saves labor costs, and the detection data is more accurate (manual scanning may miss some items).

[0080] It can be understood that the above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the patent scope of the utility model. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the utility model, the above-mentioned technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the utility model. Therefore, all equivalent changes and modifications made to the scope of the claims of the utility model should fall within the scope of the claims of the utility model.

Claims

1. A nuclear power plant rotor impeller detection device, characterized in that: It comprises a base (10), an X-direction moving mechanism (20), a Y-direction moving mechanism (30), a Z-direction moving mechanism (40) and a detection mechanism (50); The X-direction moving mechanism (20) is installed on the base (10), and the X-direction moving mechanism (20) comprises two X-direction guide rails (21) arranged parallel to each other, a first slide (22) movably installed on each of the X-direction guide rails (21), and a first driving component (23) connected to each of the first slides (22) to drive the first slide (22) to move along the X-direction guide rails (21); The Y-direction moving mechanism (30) comprises a connecting frame (31), a Y-direction guide rail (32), a second slide (33) and a second driving assembly (34); the connecting frame (31) connects the two first slides (22), the Y-direction guide rail (32) is installed on the connecting frame (31), the second slide (33) is movably installed on the Y-direction guide rail (32), and the second driving assembly (34) is connected to the second slide (33) to drive the second slide (33) to move along the Y-direction guide rail (32); The Z-direction moving mechanism (40) is connected to the second slide (33), the detection mechanism (50) is connected to the Z-direction moving mechanism (40), and the detection mechanism (50) comprises a rotating component (51) and a detection component (52) connected to the rotating component (51).

2. The nuclear power plant set rotor impeller detection device according to claim 1, characterized in that: Each of the first slide platforms (22) is provided with a first mounting plate (221), and the first mounting plate (221) is provided with a first sliding block (222) connected to the X-direction guide rail (21); The X-direction moving mechanism (20) further comprises a first tooth row (24) mounted on the base (10) and arranged parallel to each of the X-direction guide rails (21); Each of the first drive components (23) comprises a first drive motor (231), the first drive motor (231) being mounted on the first mounting plate (221), and the output end of the first drive motor (231) being provided with a first drive gear (232) meshing with the first gear row (24).

3. The nuclear power plant set rotor impeller detection device according to claim 2, characterized in that: A plurality of first sensors (25) are also provided on each of the first mounting plates (221).

4. The nuclear power plant set rotor impeller detection device according to claim 3, characterized in that: Both ends of each X-direction guide rail (21) in the length direction are provided with a first limiting block (211).

5. The nuclear power plant set rotor impeller detection device according to claim 4, characterized in that: At least one of the first slides (22) is connected to a first drag chain (26).

6. The nuclear power plant set rotor impeller detection device according to claim 5, characterized in that: The second slide (33) is provided with a second mounting plate (331), and the second mounting plate (331) is provided with a second sliding block (332) connected to the Y-direction guide rail (32); The Y-direction moving mechanism (30) further comprises a second tooth row (35) mounted on the connecting frame (31) and arranged parallel to the Y-direction guide rail (32); The second drive assembly (34) comprises a second drive motor (341), the second drive motor (341) is mounted on the second mounting plate (331), and the output end of the second drive motor (341) is provided with a second drive gear (342) meshing with the second gear row (35).

7. The nuclear power plant set rotor impeller detection device according to claim 6, characterized in that: The number of the Y-guide rails (32) is at least two; At least two of the Y-guide rails (32) are arranged in parallel.

8. The nuclear power plant set rotor impeller detection device according to claim 6, characterized in that: A plurality of second sensors (36) are also provided on the second mounting plate (331).

9. The nuclear power plant set rotor impeller detection device according to claim 6, characterized in that: Second limiting blocks (311) are respectively provided at both ends of the connecting frame (31) in the length direction.

10. The nuclear power plant set rotor impeller detection device according to claim 6, characterized in that: The second mounting plate (331) is also provided with a limiting portion (333); An anti-collision block (37) is provided on the connecting frame (31) on the moving path of the second slide (33).

11. The nuclear power plant set rotor impeller detection device according to claim 1, characterized in that: The Y-axis moving mechanism (30) further comprises a second drag chain (38) connected to the second slide table (33).

12. The nuclear power plant set rotor impeller detection device according to claim 11, characterized in that: The Z-direction moving mechanism (40) comprises a first Z-direction moving module (41) and a second Z-direction moving module (42) connected to each other, and the first Z-direction moving module (41) is connected to the second slide table (33); The rotating assembly (51) is movably mounted on the second Z-direction movable module (42).

13. The nuclear power plant set rotor impeller detection device according to claim 12, characterized in that: The rotating assembly (51) comprises a bracket (511) and a rotating motor (512); The bracket (511) is movably mounted on the second Z-direction movable module (42), the rotary motor (512) is disposed on the bracket (511), and the rotary rod (5121) of the rotary motor (512) is connected to the detection assembly (52).

14. The nuclear power plant set rotor impeller detection device according to claim 13, characterized in that: The detection assembly (52) comprises a cylinder (521), a fixture (522) and a detector (523); The cylinder (521) is connected to the rotating rod (5121), the telescopic rod (5211) of the cylinder (521) is connected to the clamp (522), and the detector (523) is installed in the clamp (522).

15. The nuclear power plant set rotor impeller detection device according to claim 14, characterized in that: The detector (523) includes an ultrasound probe.

16. The nuclear power plant set rotor impeller detection device according to any one of claims 1 to 15, characterized in that: The nuclear power plant rotor impeller detection device further comprises two support mechanisms (60) arranged in parallel and spaced apart, each of the support mechanisms (60) comprising a support frame (61), a driving wheel (62) and a driven wheel (63); The driving wheel (62) is mounted on the supporting frame (61), the driven wheel (63) is mounted on the shaft of the nuclear power plant rotor, and the driven wheel (63) is connected to the driving wheel (62).

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