Large embedded anchor bolt scanner for nuclear power plant

Abstract

The invention discloses a large embedded anchor bolt scanner for a nuclear power plant. The large embedded anchor bolt scanner comprises a mounting mechanism, a rotating mechanism, a radial moving mechanism, an encoder and a probe mechanism, the mounting mechanism comprises a mounting base used for being mounted at the end of the large pre-embedded anchor bolt of the nuclear power plant. The rotating mechanism comprises an arc-shaped chuck and a guide wheel and is used for moving on the outer surface of the mounting seat in the circumferential direction; the radial moving mechanism comprises a base; the encoder comprises a fixed seat, an encoder wheel and an encoder chip; the probe mechanism is movably installed on the base and comprises an ultrasonic phased array probe attached to the end face of the large embedded anchor bolt of the nuclear power plant. Full-length ultrasonic detection of the large embedded anchor bolt of the nuclear power plant can be carried out through the end part of the large embedded anchor bolt of the nuclear power plant, the automation level of ultrasonic detection of the bolt can be improved, the working efficiency is improved, the working intensity of personnel is reduced, and the irradiation dose of the personnel is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of nuclear power, in particular to a large embedded anchor bolt scanner for nuclear power plant. BACKGROUND

[0002] The main equipment of the nuclear island of the nuclear power plant is fixed by a large embedded anchor bolt. The length of the large embedded anchor bolt is large, and most of the bolt cannot be reached except for the end part of the bolt, which is in a pre-embedded state. The traditional bolt detection adopts a manual moving probe, and the worker needs to hold the moving probe all the time. This operation mode leads to high work intensity and low detection efficiency of the worker. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a large embedded anchor bolt scanner for nuclear power plant to solve the problems of high work intensity and low detection efficiency caused by manual moving probe detection.

[0004] The technical scheme adopted by the present application to solve the technical problem is: a large embedded anchor bolt scanner for nuclear power plant is constructed, which comprises a mounting mechanism, a rotating mechanism, a radial moving mechanism, an encoder and a probe mechanism.

[0005] The mounting mechanism comprises a mounting seat, which is a hollow structure with both ends penetrating axially, and the mounting seat is used for mounting on the end of the large embedded anchor bolt of the nuclear power plant.

[0006] The rotating mechanism comprises an arc chuck and a plurality of guide wheels, the plurality of guide wheels are connected with the arc chuck, and are used for moving on the outer surface of the circumference of the mounting seat.

[0007] The radial moving mechanism comprises a base, which is located above the mounting seat, and the first end of the base is connected with the arc chuck.

[0008] The encoder comprises a fixed seat, an encoder wheel and an encoder chip, the fixed seat is connected with the second end of the base, the encoder wheel and the encoder chip are both connected with the fixed seat, and the encoder wheel is used for moving on the outer surface of the circumference of the mounting seat.

[0009] The probe mechanism is movably installed on the base, and the probe mechanism comprises an ultrasonic phased array probe which is in close contact with the end face of the large embedded anchor bolt of the nuclear power plant.

[0010] In some embodiments, the mounting mechanism further includes an adapter seat, which is a hollow structure that extends through both ends axially. The adapter seat is installed at the end of the large pre-embedded anchor bolt of the nuclear power plant. The mounting seat is sleeved on the outer periphery of the adapter seat and fixed relative to the adapter seat. The mounting seat and the adapter seat are coaxially arranged.

[0011] In some embodiments, the inner surface of the mounting base is provided with a limiting protrusion, which is used to abut against the axial upper end face of the adapter; the mounting base has at least three limiting holes, which are evenly distributed along the circumferential direction of the mounting base.

[0012] The adapter has at least three limiting grooves, which are evenly spaced along the circumferential direction of the adapter.

[0013] The mounting mechanism also includes a number of fasteners, which are used to connect the limiting hole and the limiting groove so that the mounting base and the adapter base are relatively fixed.

[0014] In some embodiments, the mounting base has an annular guide groove on its outer side near its upper end, and both the guide wheel and the encoder wheel move along the guide groove.

[0015] In some embodiments, the encoder includes a connecting rod and a first elastic element, the fixing seat is passed through the fixing seat via the connecting rod and connected to a second end of the base, and the first elastic element is mounted on the portion of the connecting rod away from the base.

[0016] In some embodiments, the base has a through groove extending through its upper and lower surfaces, the through groove extending along the length direction of the base, and a pair of guide rails provided on the upper surface of the base, the guide rails extending along the length direction of the base;

[0017] The probe mechanism includes a positioning seat, a connector, a clamping seat, and a clamping frame;

[0018] The positioning seat is movably mounted on the guide rail via a slider. One end of the connector is connected to the positioning seat, and the other end of the connector extends through the through groove to be rotatably connected to the clamping seat. The clamping frame is rotatably connected to the clamping seat, and the ultrasonic phased array probe is mounted on the clamping frame.

[0019] In some embodiments, the guide rail is provided with a plurality of positioning holes, and the plurality of positioning holes are provided to extend along the length direction of the guide rail;

[0020] The positioning seat is also provided with a number of positioning elements, which are used to be inserted into the positioning hole to restrict the positioning seat to a fixed position.

[0021] In some embodiments, the connector includes two connecting limit rods, and the positioning seat is further provided with a linear bearing that cooperates with the connecting limit rods;

[0022] The clamping seat includes a base body, and the base body extends in a first direction with two clamping arms, which are arranged in parallel relative to each other.

[0023] The lower ends of the two connecting and limiting rods are respectively rotatably connected to the side of the seat in the second direction; the first direction is perpendicular to the second direction;

[0024] The clamping frame is rotatably connected to the two clamping arms.

[0025] In some embodiments, the portion of the connecting limiting rod located below the positioning seat is provided with a second elastic element.

[0026] In some embodiments, the first end of the base is provided with an operating element, and / or the fixed base is provided with an operating element.

[0027] The present invention has the following beneficial effects: the large pre-embedded anchor bolt scanner for nuclear power plants can perform full-length ultrasonic testing of large pre-embedded anchor bolts through the ends of the bolts, which can improve the automation level of bolt ultrasonic testing, increase work efficiency, reduce the intensity of personnel work, and reduce personnel radiation dose. Attached Figure Description

[0028] 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 some embodiments of the present invention and should not be considered as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort. In the drawings:

[0029] Figure 1 This is one of the application schematic diagrams of the large pre-embedded anchor bolt scanner in nuclear power plants in some embodiments of the present invention;

[0030] Figure 2 This is the second schematic diagram of the application of the nuclear power plant large pre-embedded anchor bolt scanner in some embodiments of the present invention;

[0031] Figure 3 This is one of the application schematic diagrams of the large pre-embedded anchor bolt scanner for nuclear power plants (without installation mechanism) in some embodiments of the present invention;

[0032] Figure 4 This is the second schematic diagram of the application of the nuclear power plant large pre-embedded anchor bolt scanner (without installation mechanism) in some embodiments of the present invention;

[0033] Figure 5 This is a schematic diagram of the structure of a large pre-embedded anchor bolt scanner for nuclear power plants in some embodiments of the present invention;

[0034] Figure 6 This is a cross-sectional view of a large pre-embedded anchor bolt scanner for nuclear power plants in some embodiments of the present invention;

[0035] Figure 7 This is a cross-sectional view of the mounting mechanism in some embodiments of the present invention;

[0036] Figure 8 This is a schematic diagram of the structure of a large pre-embedded anchor bolt scanner for nuclear power plants (without installation mechanism) in some embodiments of the present invention;

[0037] Figure 9 This is a schematic diagram of the encoder structure in some embodiments of the present invention. Detailed Implementation

[0038] To provide a clearer understanding of the technical features, objectives, and effects of this invention, specific embodiments are now described in detail with reference to the accompanying drawings. In the following description, it should be understood that the orientations or positional relationships indicated by terms such as "front," "rear," "upper," "lower," "left," "right," "longitudinal," "horizontal," "vertical," "horizontal," "top," "bottom," "inner," "outer," "head," and "tail" are based on the orientations or positional relationships shown in the accompanying drawings, and are constructed and operated in a specific orientation. They are only for the convenience of describing this technical solution and do not indicate that the device or element referred to must have a specific orientation; therefore, they should not be construed as limitations on this invention.

[0039] It should also be noted that, unless otherwise explicitly specified and limited, terms such as "installation," "connection," "linking," "fixing," and "setting" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. When an component is referred to as being "on" or "below" another component, the component can be located "directly" or "indirectly" on the other component, or there may be one or more intermediary components. The terms "first," "second," "third," etc., are only for the convenience of describing this technical solution and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, features defined with "first," "second," "third," etc., may explicitly or implicitly include one or more of that feature. For those skilled in the art, the specific meaning of the above terms in this invention can be understood according to the specific circumstances.

[0040] In the following description, specific details such as particular system architectures and techniques are set forth for illustrative purposes and not for limitation, in order to provide a thorough understanding of the embodiments of the invention. However, those skilled in the art will understand that the invention can be implemented in other embodiments without these specific details. In other instances, detailed descriptions of well-known systems, apparatuses, circuits, and methods are omitted so as not to obscure the description of the invention with unnecessary detail.

[0041] See Figures 1 to 9 This invention discloses a scanner for large pre-embedded anchor bolts in nuclear power plants. The scanner is capable of inspecting defects along the entire length of the large pre-embedded anchor bolt 100 from its end. The large pre-embedded anchor bolt 100 includes, but is not limited to, large pre-embedded anchor bolts with varying diameters.

[0042] The large pre-embedded anchor bolt scanner for nuclear power plants includes an installation mechanism 10, a rotation mechanism 20, a radial movement mechanism 30, an encoder 40, and a probe mechanism 50.

[0043] The installation mechanism 10 includes a mounting base 11, which is a hollow structure with both ends axially connected. The mounting base 11 is used to install on the end of the large pre-embedded anchor bolt 100 of the nuclear power plant.

[0044] The rotating mechanism 20 includes an arc-shaped chuck 21 and a plurality of guide wheels 22, which are connected to the arc-shaped chuck 21 and are used to move on the outer surface of the mounting base 11 in the circumferential direction.

[0045] The radial moving mechanism 30 includes a base 31 located above the mounting base 11, and the first end of the base 31 is connected to the arc-shaped chuck 21.

[0046] The encoder 40 includes a fixed base 41, an encoder wheel 42, and an encoder chip 43. The fixed base 41 is connected to the second end of the base 31. Both the encoder wheel 42 and the encoder chip 43 are connected to the fixed base 41. The encoder wheel 42 is used to move on the outer surface of the mounting base 11 in the circumferential direction. The rotation of the encoder wheel 42 drives the magnet to rotate, and the encoder chip 43 generates a pulse signal. By recording the pulse signal, the arc length of the rotation can be calculated, and the angle of rotation can be obtained through calculation.

[0047] The probe mechanism 50 is movably mounted on the base 31. The probe mechanism 50 includes an ultrasonic phased array probe 55 that is attached to the end face of the large pre-embedded anchor bolt 100 of the nuclear power plant.

[0048] This large-scale pre-embedded anchor bolt scanner for nuclear power plants can perform full-length ultrasonic testing of the large-scale pre-embedded anchor bolts 100 through their ends, and features adaptive adjustment and real-time coding positioning functions. It can improve the automation level of bolt ultrasonic testing, increase operational efficiency, reduce the intensity of manual labor, and decrease personnel radiation dose.

[0049] Combination Figure 6 and Figure 7 As shown, in some embodiments, the mounting base 11 can be a circular cylindrical structure with both ends extending through it axially. The mounting mechanism 10 also includes an adapter 12, which is a hollow structure extending through both ends axially. The axial length of the adapter 12 is less than the axial length of the mounting base 11, and the adapter 12 can be a circular cylindrical structure. The adapter 12 is installed at the end of the large pre-embedded anchor bolt 100 for nuclear power plants. The mounting base 11 is sleeved on the outer periphery of the adapter 12 and fixed relative to the adapter 12. The mounting base 11 and the adapter 12 are coaxially arranged. Different specifications of large pre-embedded anchor bolts 100 for nuclear power plants can be manufactured with different specifications of adapter 12, while the mounting base 11 can be a universal component. After selecting a suitable adapter 12 according to the different specifications of large pre-embedded anchor bolts 100 for nuclear power plants, the mounting base 11 and the adapter 12 can be fixed relative to each other to perform subsequent testing work. Preferably, the adapter 12 may be selected from, but is not limited to, a nylon adapter.

[0050] Combination Figure 6 and Figure 7 As shown, in some embodiments, the inner surface of the mounting base 11 is provided with a limiting protrusion 111. The limiting protrusion 111 may be an annular structure, and the lower surface of the limiting protrusion 111 may be a planar structure so as to abut against the upper end surface of the adapter 12.

[0051] The limiting protrusion 111 is used to abut against the axial upper end face of the adapter 12; the mounting base 11 has at least three limiting holes, and the at least three limiting holes are evenly distributed along the circumferential direction of the mounting base 11.

[0052] The adapter 12 has at least three limiting grooves 121, which are evenly spaced along the circumference of the adapter 12. The limiting grooves 121 can be U-shaped grooves with their openings facing downwards.

[0053] The mounting mechanism 10 also includes a plurality of fasteners 13, which are used to connect the limiting hole and the limiting groove 121 so that the mounting base 11 and the adapter base 12 are fixed relative to each other.

[0054] Preferably, the number of limiting holes is three, the number of limiting grooves 121 is also three, and the fastener 13 can be, but is not limited to, fastening bolts, fastening screws, fastening pins, or locking knobs.

[0055] Understandably, the mounting base 11 and the adapter base 12 are fastened to the large pre-embedded anchor bolt 100 of the nuclear power plant by the fastener 13. The adapter base 12 with the corresponding diameter is selected according to the large pre-embedded anchor bolt 100 of the nuclear power plant that is being tested, which can reduce the time required for the centering adjustment of the mechanism. After the fastener 13 is locked, the installation of the mounting mechanism 10 is completed.

[0056] Combination Figure 6 and Figure 7 As shown, in some embodiments, the mounting base 11 has an annular guide groove 112 on its outer side near its upper end, and both the guide wheel 22 and the encoder wheel 42 move along the guide groove 112.

[0057] Combination Figure 6 and Figure 7 As shown, in some embodiments, the upper end of the mounting base 11 is provided with an annular groove, and the lower surface of the base 31 is provided with an annular protrusion. The protrusion and the groove cooperate with each other to play a guiding and limiting role.

[0058] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, in some embodiments, the rotating mechanism 20 includes an arc-shaped chuck 21 and several guide wheels 22, forming a three-jaw chuck mechanism; the guide wheels 22 slide within the guide groove 112, enabling the circumferential rotation scanning function of the ultrasonic phased array probe 55. The number of guide wheels 22 can be three. In some embodiments, the arc-shaped chuck 21 is further provided with a driving member connected to the guide wheels 22. This driving member is used to drive the guide wheels 22 to move along the outer circumferential surface of the mounting base 11, or to drive the guide wheels 22 to move along the guide groove 112 of the mounting base 11. The driving member includes, but is not limited to, a motor, such as a servo motor.

[0059] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 8 as well as Figure 9As shown, in some embodiments, the encoder 40 includes a connecting rod 44 and a first elastic member 45. The fixed base 41 is inserted through the connecting rod 44 and connected to the second end of the base 31. The first elastic member 45 is mounted on the portion of the connecting rod 44 facing away from the base 31. The first elastic member 45 can apply a spring force to the fixed base 41, so that the encoder wheel 42 on the fixed base 41 always fits against the outer surface of the mounting base 11 or the guide groove 112. The connecting rod 44 can be a screw, and the number of connecting rods 44 can be one or two. Preferably, the number of connecting rods 44 is two. The first elastic member 45 includes, but is not limited to, a helical columnar spring.

[0060] Combination Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 and Figure 8 As shown, in some embodiments, the base 31 has a through groove 311 that extends through its upper and lower surfaces. The through groove 311 extends along the length direction of the base 31. The through groove 311 can be an oblong through groove. The upper surface of the base 31 is provided with a pair of guide rails 32 that extend along the length direction of the base 31.

[0061] The probe mechanism 50 includes a positioning base 51, a connector 52, a clamping base 53, and a clamping frame 54. The positioning base 51 is movably mounted on the guide rail 32 via a slider 56. One end of the connector 52 is connected to the positioning base 51, and the other end of the connector 52 extends through the through groove 311 to be rotatably connected to the clamping base 53. The clamping frame 54 is rotatably connected to the clamping base 53, and the ultrasonic phased array probe 55 is mounted on the clamping frame 54.

[0062] like Figure 8 As shown, in some embodiments, the guide rail 32 is provided with a plurality of positioning holes 321, which extend along the length of the guide rail 32. The positioning seat 51 is also provided with a plurality of positioning members 57, which are inserted into the positioning holes 321 to fix the positioning seat 51 in a fixed position. The positioning members 57 may be, but are not limited to, fastening bolts, fastening screws, fastening pins, or locking knobs, and are not specifically limited here. Specifically, the radial movement mechanism 30 can realize the radial position adjustment of the ultrasonic phased array probe 55 relative to the scanning workpiece. After adjusting to a suitable position, the positioning members 57 are locked to fix the radial position of the ultrasonic phased array probe 55.

[0063] In some embodiments, the base 31 is further provided with a drive assembly connected to the positioning seat 51. This drive assembly drives the positioning seat 51 to move repeatedly along the guide rail 32 and controls the positioning seat 51 to stop at a fixed position. The drive assembly includes a drive motor and a lead screw connected to the positioning seat 51. The drive motor can be a servo motor, which has forward and reverse rotation capabilities and high adjustment precision. Alternatively, the drive assembly includes a hydraulic cylinder, with its drive rod connected to the positioning seat 51. Or, the drive assembly includes a pneumatic cylinder, with its pneumatic rod connected to the positioning seat 51.

[0064] like Figure 6 As shown, in some embodiments, the connector 52 includes two connecting limit rods, and the positioning seat 51 is also provided with a linear bearing 511 that cooperates with the connecting limit rods, which can realize the axial sliding of the ultrasonic phased array probe 55 and ensure the rigidity in this direction.

[0065] like Figure 8 As shown, the clamping seat 53 includes a seat body 531, from which two clamping arms 532 extend in a first direction and are arranged parallel to each other. The lower ends of the two connecting limiting rods are rotatably connected to the side of the seat body 531 in a second direction; the first direction and the second direction are perpendicular to each other; the clamping frame 54 is rotatably connected to the two clamping arms 532. When the first direction is the length direction of the seat body 531, the second direction is the width direction of the seat body 531.

[0066] like Figure 8 As shown, in some embodiments, the portion of the connecting limiting rod located below the positioning seat 51 is provided with a second elastic element 58. The second elastic element 58 includes, but is not limited to, a helical columnar spring, which is a compression spring.

[0067] Understandably, the clamping seat 53 can swing at a small angle relative to the connecting member 52, and the clamping frame 54 can swing at a small angle in the other direction relative to the clamping seat 53. A second elastic member 58 is sleeved on the outside of the connecting member 52, which can realize the vertical height adjustment of the ultrasonic phased array probe 55 relative to the positioning seat 51. Through these degrees of freedom of adjustment, the ultrasonic phased array probe 55 can be well fitted with the end face of the large pre-embedded anchor bolt 100 of the nuclear power plant, thereby improving the detection effect.

[0068] like Figure 8 As shown, in some embodiments, the first end of the base 31 is provided with an operating element 60, and / or the fixed base 41 is provided with an operating element 60. The operating element 60 allows the operator to assist in rotating the rotating mechanism 20 and / or the encoder 40.

[0069] The operating element 60 can be an operating handle or an operating handwheel. The operating element 60 can be vertically connected to the upper surface of the first end of the base 31, for example, by a threaded connection. Alternatively, the operating element 60 can be vertically connected to the upper surface of the fixed base 41, for example, by a threaded connection.

[0070] It is understood that the above embodiments only illustrate preferred embodiments of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can freely combine the above technical features without departing from the concept of the present invention, and can also make several modifications and improvements, all of which fall within the protection scope of the present invention. Therefore, all equivalent transformations and modifications made with respect to the scope of the claims of the present invention should fall within the scope of the claims of the present invention.

Claims

1. A scanner for large pre-embedded anchor bolts in nuclear power plants, characterized in that, It includes an installation mechanism (10), a rotation mechanism (20), a radial movement mechanism (30), an encoder (40), and a probe mechanism (50); The installation mechanism (10) includes a mounting base (11), which is a hollow structure with both ends axially connected. The mounting base (11) is used to install on the end of a large pre-embedded anchor bolt (100) for nuclear power plants. The rotating mechanism (20) includes an arc-shaped chuck (21) and a plurality of guide wheels (22), the plurality of guide wheels (22) being connected to the arc-shaped chuck (21) for moving on the outer surface of the mounting base (11) in the circumferential direction; The radial moving mechanism (30) includes a base (31) located above the mounting base (11), and a first end of the base (31) is connected to the arc-shaped chuck (21). The encoder (40) includes a fixed base (41), an encoder wheel (42), and an encoder chip (43). The fixed base (41) is connected to the second end of the base (31). The encoder wheel (42) and the encoder chip (43) are both connected to the fixed base (41). The encoder wheel (42) is used to move on the outer surface of the mounting base (11) in the circumferential direction. The probe mechanism (50) is movably mounted on the base (31), and the probe mechanism (50) includes an ultrasonic phased array probe (55) that is in contact with the end face of the large pre-embedded anchor bolt (100) of the nuclear power plant.

2. The large-scale pre-embedded anchor bolt scanner for nuclear power plants according to claim 1, characterized in that, The installation mechanism (10) further includes an adapter (12), which is a hollow structure with both ends through the axial direction. The adapter (12) is installed at the end of the large pre-embedded anchor bolt (100) of the nuclear power plant. The mounting seat (11) is sleeved on the outer periphery of the adapter (12) and fixed relative to the adapter (12). The mounting seat (11) and the adapter (12) are coaxially arranged.

3. The large-scale pre-embedded anchor bolt scanner for nuclear power plants according to claim 2, characterized in that, The inner surface of the mounting base (11) is provided with a limiting protrusion (111), which is used to abut against the axial upper end face of the adapter (12); the mounting base (11) has at least three limiting holes, which are evenly distributed along the circumferential direction of the mounting base (11). The adapter (12) has at least three limiting grooves (121), and the at least three limiting grooves (121) are evenly distributed at intervals along the circumferential direction of the adapter (12); The mounting mechanism (10) further includes a plurality of fasteners (13), which are used to connect the limiting hole and the limiting groove (121) so that the mounting base (11) and the adapter base (12) are relatively fixed.

4. The large-scale pre-embedded anchor bolt scanner for nuclear power plants according to claim 2, characterized in that, The mounting base (11) has an annular guide groove (112) on its outer side near its upper end, and the guide wheel (22) and the encoder wheel (42) both move along the guide groove (112).

5. The large-scale pre-embedded anchor bolt scanner for nuclear power plants according to claim 1, characterized in that, The encoder (40) includes a connecting rod (44) and a first elastic element (45). The fixed seat (41) is passed through the fixed seat (41) via the connecting rod (44) and connected to the second end of the base (31). The first elastic element (45) is installed on the part of the connecting rod (44) away from the base (31).

6. The large-scale pre-embedded anchor bolt scanner for nuclear power plants according to claim 1, characterized in that, The base (31) has a through groove (311) that runs through its upper and lower surfaces. The through groove (311) extends along the length of the base (31). A pair of guide rails (32) are provided on the upper surface of the base (31). The guide rails (32) extend along the length of the base (31). The probe mechanism (50) includes a positioning seat (51), a connector (52), a clamping seat (53), and a clamping frame (54); The positioning seat (51) is movably mounted on the guide rail (32) via a slider (56). One end of the connector (52) is connected to the positioning seat (51), and the other end of the connector (52) extends through the through groove (311) to be rotatably connected to the clamping seat (53). The clamping frame (54) is rotatably connected to the clamping seat (53), and the ultrasonic phased array probe (55) is mounted on the clamping frame (54).

7. The large-scale pre-embedded anchor bolt scanner for nuclear power plants according to claim 6, characterized in that, The guide rail (32) is provided with a plurality of positioning holes (321), and the plurality of positioning holes (321) extend along the length direction of the guide rail (32); The positioning seat (51) is also provided with a plurality of positioning elements (57), which are used to be inserted into the positioning hole (321) to limit the positioning seat (51) to a fixed position.

8. The large-scale pre-embedded anchor bolt scanner for nuclear power plants according to claim 6, characterized in that, The connector (52) includes two connecting limit rods, and the positioning seat (51) is also provided with a linear bearing (511) that cooperates with the connecting limit rods; The clamping seat (53) includes a seat body (531), and the seat body (531) extends in a first direction with two clamping arms (532), and the two clamping arms (532) are arranged in parallel relative to each other; The lower ends of the two connecting and limiting rods are respectively rotatably connected to the side of the seat (531) in the second direction; the first direction is perpendicular to the second direction; The clamping frame (54) is rotatably connected to the two clamping arms (532).

9. The large-scale pre-embedded anchor bolt scanner for nuclear power plants according to claim 8, characterized in that, The portion of the connecting limiting rod located below the positioning seat (51) is provided with a second elastic element (58).

10. The large-scale pre-embedded anchor bolt scanner for nuclear power plants according to claim 1, characterized in that, The first end of the base (31) is provided with an operating element (60), and / or the fixed base (41) is provided with an operating element (60).

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