Device for detecting nuclear reactor pressure vessel

Abstract

The invention relates to the technical field of nuclear reactor pressure vessel detection, in particular to a device for nuclear reactor pressure vessel detection. The device for detecting the nuclear reactor pressure vessel comprises a workbench which is used for being arranged in the pressure vessel in a liftable and rotatable mode; the cleaning unit comprises a plurality of cleaning pads, and the cleaning pads are arranged on the outer side face of the workbench in the circumferential direction and used for cleaning the inner wall of the pressure container when the workbench ascends, descends and rotates; the detection unit comprises a camera and a thermal infrared imager, and the camera and the thermal infrared imager are arranged on the workbench and used for obtaining image information of the inner wall of the pressure container when the workbench ascends, descends and rotates. According to the device for detecting the nuclear reactor pressure vessel, the inner wall of the nuclear reactor pressure vessel can be cleaned and detected, and the problem that images are not clear during image acquisition is solved conveniently by cleaning the inner wall of the pressure vessel.

Description

Technical Field

[0001] The present application relates to the technical field of nuclear reactor pressure vessel detection, and in particular to a device for detecting a nuclear reactor pressure vessel. Background Art

[0002] In modern industrial production, nuclear energy is widely used as a clean energy source. In the process of ensuring the safe operation of nuclear power plants, the status detection of nuclear reactor pressure vessels is particularly important because it directly affects the safety of the entire nuclear power plant. The pressure vessel of a nuclear reactor is a key component in a nuclear power plant. It undertakes multiple functions such as wrapping nuclear fuel, controlling reactivity, transferring heat, and maintaining system pressure. Under long-term high temperature and high pressure working conditions, corrosion, cracks or other defects may occur on the inner wall of the pressure vessel. If these defects are not discovered and handled in time, serious consequences may occur. In order to ensure the integrity of the pressure vessel, it needs to be inspected regularly. Therefore, it is particularly important to select suitable detection devices and develop efficient and accurate detection technology. Summary of the invention

[0003] The embodiment of the present application at least provides a nuclear reactor pressure vessel inspection device, which can realize the cleaning and inspection of the inner wall of the nuclear reactor pressure vessel, and by cleaning the inner wall of the pressure vessel, it is convenient to improve the problem of unclear images during image acquisition.

[0004] The embodiment of the present application provides a nuclear reactor pressure vessel detection device, comprising:

[0005] A workbench, which is arranged in the pressure vessel in a manner that it can be raised and lowered and rotatably disposed;

[0006] A cleaning unit, comprising a plurality of cleaning pads, the cleaning pads being circumferentially arranged on the outer side surface of the workbench, and being used for cleaning the inner wall of the pressure vessel when the workbench is lifted, lowered and rotated;

[0007] The detection unit includes a camera and an infrared thermal imager, wherein the camera and the infrared thermal imager are arranged on the workbench and are used to obtain image information of the inner wall of the pressure vessel when the workbench is lifted, lowered and rotated.

[0008] In an optional embodiment, the cleaning pads are detachably connected to the workbenches.

[0009] In an optional implementation, it also includes:

[0010] The mounting unit is used to detachably mount the cleaning pad on the workbench.

[0011] In an optional embodiment, the mounting unit includes a plurality of clamping blocks, which are disposed on the workbench and correspond to the cleaning pad. The clamping blocks are configured to be able to move radially along the workbench under the action of an external force, and have a first position and a second position. In the first position, the clamping block is engaged with the cleaning pad, and in the second position, the clamping block is released from the cleaning pad.

[0012] In an optional embodiment, the cleaning pad is provided with a positioning opening, and the positioning opening is used to cooperate with a positioning block provided on the workbench to perform installation and positioning.

[0013] In an optional embodiment, a slot is provided at one end of the cleaning pad, and a socket matching the slot is provided at the other end, and two adjacent cleaning pads are connected via the slot and the socket.

[0014] In an optional embodiment, the mounting unit further includes a plurality of thrust mechanisms and a plurality of first elastic members; the thrust mechanisms are arranged on the workbench and correspond to the block, and the thrust mechanisms are used to act on the block to move it radially along the workbench; the first elastic member is connected between the block and the workbench, and the first elastic member is configured to restore the block to the second position when the external force disappears.

[0015] In an optional embodiment, the thrust mechanism includes a sleeve, a movable column, an unlocking member, a second elastic member and a third elastic member; the sleeve is arranged on the workbench; the movable column is arranged in the sleeve, the movable column is arranged to be able to move axially relative to the sleeve under the action of an external force, and has a locking position and an initial position, in which the movable column is locked with the sleeve and pushes the block to the first position, and in the initial position, the movable column allows the first elastic member to restore the block to the second position; the unlocking member is arranged on the sleeve, the unlocking member is arranged to be able to move relative to the sleeve under the action of an external force to release the locking relationship between the movable column and the sleeve; the second elastic member is arranged between the movable column and the sleeve, the second elastic member is arranged to restore the movable column to the initial position when the movable column and the sleeve are unlocked; the third elastic member is arranged between the unlocking member and the sleeve, and the third elastic member is arranged to reset the unlocking member when the external force disappears.

[0016] In an optional embodiment, the mounting unit further includes a collar and a fourth spring; the collar is disposed on the workbench, the collar is configured to be able to rotate circumferentially relative to the workbench under the action of an external force, and has a first rotation position and a second rotation position, the collar is provided with a plurality of push blocks along its circumference, the push blocks correspond to the unlocking members, in the first rotation position, the push blocks are away from the corresponding unlocking members, in the second rotation position, the push blocks act on the corresponding unlocking members to unlock the corresponding movable column and the sleeve; the fourth spring is disposed between the collar and the workbench, the fourth spring is configured to keep the collar in the second rotation position when the external force disappears.

[0017] In an optional embodiment, the mounting unit further includes a swivel and a plurality of connecting rod mechanisms; the swivel is disposed on the workbench and is capable of rotating circumferentially relative to the workbench; the connecting rod mechanism is connected between the swivel and the workbench and corresponds to the block, and the connecting rod mechanism is configured to be able to deform when the swivel rotates, and has a first posture and a second posture, in the first posture, the connecting rod mechanism pushes the block to the first position, and in the second posture, the connecting rod mechanism allows the block to return to the second position.

[0018] The above technical solution of the present application has the following beneficial technical effects:

[0019] The nuclear reactor pressure vessel inspection device of the embodiment of the present application can realize the cleaning and inspection of the inner wall of the nuclear reactor pressure vessel, and by cleaning the inner wall of the pressure vessel, it is convenient to improve the problem of unclear images during image acquisition.

[0020] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, preferred embodiments are specifically cited below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. The drawings herein are incorporated into the specification and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and are used together with the specification to illustrate the technical solutions of the present application. It should be understood that the following drawings only illustrate certain embodiments of the present application and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can also be obtained based on these drawings without creative work.

[0022] Figure 1 A schematic structural diagram of a nuclear reactor pressure vessel detection device provided in an embodiment of the present application is shown;

[0023] Figure 2 Shows Figure 1 Schematic diagram of the assembly of the workbench, cleaning unit and detection unit;

[0024] Figure 3 Shows Figure 2 Schematic diagram of the internal assembly;

[0025] Figure 4 Shows Figure 3 Working diagram of the thrust mechanism in FIG.

[0026] Figure 5 Shows Figure 4 Schematic diagram of the structure of the middle casing;

[0027] Figure 6 Shows Figure 4 The structural diagram of the middle movable column;

[0028] Reference numerals:

[0029] 1. workbench; 11. first fixed plate; 12. second fixed plate; 13. third fixed plate; 131. mounting plate; 14. support column; 2. crossbeam; 3. turntable; 4. motor; 5. electric telescopic rod; 6. cleaning unit; 61. cleaning pad; 611. slot; 612. jack; 7. mounting unit; 71. block; 711. first force-bearing part; 712. second force-bearing part; 72. first elastic member; 73. thrust mechanism; 731. sleeve; 7311. first opening; 7312. second opening Mouth; 732, movable column; 7321, inclined rod; 7322, protrusion; 7323, driving part; 733, second elastic member; 74, unlocking member; 741, support rod; 742, translation block; 743, extrusion head; 744, pull rod; 75, third elastic member; 76, collar; 761, push block; 77, fourth spring; 78, swivel; 781, driving plate; 79, connecting rod mechanism; 791, straight connecting rod; 792, arc connecting rod; 8, detection unit; 81, camera; 82, infrared thermal imager. DETAILED DESCRIPTION

[0030] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0031] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and should not be construed as limitations on the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0032] The term "first" or "second" in the specification and claims of this application may include one or more of the features explicitly or implicitly. In the description of this application, unless otherwise specified, "plurality" means two or more. In addition, "and / or" in the specification and claims means at least one of the connected objects, and the character " / " generally means that the objects connected before and after are in an "or" relationship.

[0033] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0034] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0035] The embodiment of the present application provides a nuclear reactor pressure vessel inspection device, which can clean and inspect the inner wall of the nuclear reactor pressure vessel, and by cleaning the inner wall of the pressure vessel, it is convenient to improve the problem of unclear images during image acquisition.

[0036] In some embodiments, a nuclear reactor pressure vessel inspection device includes: a workbench 1, a cleaning unit 6, a mounting unit 7, and a detection unit 8. The workbench 1 is used to be arranged in a pressure vessel in a manner that it can be raised and lowered and rotatable. The cleaning unit 6 includes a plurality of cleaning pads 61, which are arranged on the outer side of the workbench 1 along the circumferential direction, and are used to clean the inner wall of the pressure vessel when the workbench 1 is raised and lowered and rotated. The mounting unit 7 is used to detachably mount the cleaning pad 61 on the workbench 1. The detection unit 8 includes a camera 81 and an infrared thermal imager 82, which are arranged on the workbench 1, and are used to obtain image information of the inner wall of the pressure vessel when the workbench 1 is raised and lowered and rotated.

[0037] In some embodiments, the workbench 1 includes a first fixed disk 11, a second fixed disk 12, a third fixed disk 13 and a support column 14. The first fixed disk 11, the second fixed disk 12 and the third fixed disk 13 are annular structures, and the first fixed disk 11 and the second fixed disk 12 are arranged at intervals up and down. The support column 14 is connected between the first fixed disk 11 and the second fixed disk 12 to relatively fix the first fixed disk 11 and the second fixed disk 12. The third fixed disk 13 is arranged between the first fixed disk 11 and the second fixed disk 12. In the specific setting, the camera 81 and the infrared thermal imager 82 are arranged on the first fixed disk 11, and the cleaning pad 61 is arranged on the outer peripheral surface of the third fixed disk 13.

[0038] In some embodiments, a crossbeam 2 is arranged above the workbench 1, a turntable 3 and a motor 4 for driving the turntable 3 to rotate are arranged on the crossbeam 2, and the turntable 3 and the workbench 1 are connected by an electric telescopic rod 5. Specifically, by starting the motor 4, the motor 4 can drive the turntable 3 to rotate, so that the turntable 3 can drive the electric telescopic rod 5 and the workbench 1 to rotate. In addition, by starting the electric telescopic rod 5, the electric telescopic rod 5 is extended and retracted, which can drive the workbench 1 to rise and fall. In this way, the workbench 1 can be set in the pressure vessel in a manner that it can be raised and lowered and rotatable.

[0039] In some embodiments, the cleaning pads 61 are detachably connected to the workbench 1. This arrangement can facilitate the installation and removal of the cleaning pads 61.

[0040] In some embodiments, the mounting unit 7 includes a plurality of card blocks 71, which are arranged on the third fixed disk 13 and correspond to the cleaning pad 61. The card blocks 71 are arranged to be able to move radially along the workbench 1 under the action of an external force, and have a first position and a second position. In the first position, the card blocks 71 are engaged with the cleaning pad 61, and in the second position, the card blocks 71 are disengaged from the cleaning pad 61. It should be noted that, in a specific setting, a card slot is provided on the side of the cleaning pad 61 facing the workbench 1, and when the card block 71 is engaged in the card slot, the cleaning pad 61 and the card block 71 are engaged.

[0041] In some embodiments, the block 71 has a first force-bearing portion 711 and a second force-bearing portion 712, which are arranged at intervals. During use, when the first force-bearing portion 711 or the second force-bearing portion 712 is stressed, the block 71 can move radially along the workbench 1.

[0042] In some embodiments, the cleaning pad 61 is provided with a positioning opening, which is used to cooperate with a positioning block provided on the third fixing plate 13. This arrangement can realize the installation and positioning of the cleaning pad 61, and facilitates the clamping block 71 to be clamped with the cleaning pad 61.

[0043] In some embodiments, a slot 611 is provided at one end of the cleaning pad 61, and a socket 612 matching the slot 611 is provided at the other end, and two adjacent cleaning pads 61 are connected through the slot 611 and the socket 612. Specifically, the plugging direction of the slot 611 and the socket 612 is consistent with the axial direction of the workbench 1. When installing the cleaning pad 61, each cleaning pad 61 can be connected end to end through the slot 611 and the socket 612, and then the clamping block 71 is clamped with the cleaning pad 61. In the above process, since the cleaning pads 61 are connected end to end through the slot 611 and the socket 612, a limit is formed between the cleaning pads 61, so that the cleaning pads 61 can be clamped with the clamping block 71 without additional fixation.

[0044] In some embodiments, the mounting unit 7 further includes a plurality of thrust mechanisms 73 and a plurality of first elastic members 72. The thrust mechanism 73 is disposed on the first fixed disk 11 and corresponds to the block 71. The thrust mechanism 73 is used to act on the block 71 (the first force-bearing portion 711) to make it move radially along the third fixed disk 13. Specifically, the thrust mechanism 73 is used to push the block 71 to move radially along the third fixed disk 13. The first elastic member 72 is connected between the block 71 and the mounting plate 131 on the workbench 1. The first elastic member 72 is configured to restore the block 71 to the second position when the external force disappears. Specifically, the first elastic member 72 can be a spring. When the thrust mechanism 73 pushes the block 71 to move, the first elastic member 72 can shrink and accumulate potential energy. When the thrust mechanism 73 is reset, the first elastic member 72 can push or pull the block 71 to return to the second position under the action of its own elastic force, so that it is released from the clamping connection with the cleaning pad 61. It should be noted that, in order to facilitate operation during the specific setting, a through hole is provided on the first fixed plate 11 , and the thrust mechanism 73 is passed through the through hole. The upper end of the thrust mechanism 73 is used for the operator to operate, and the lower end of the thrust mechanism 73 is used to act on the block 71 .

[0045] In some embodiments, the thrust mechanism 73 includes a sleeve 731, a movable column 732, an unlocking member 74, a second elastic member 733 and a third elastic member 75. The sleeve 731 is vertically inserted into the through hole of the first fixed disk 11 and is connected and fixed to the first fixed disk 11. The movable column 732 is arranged in the sleeve 731, and the movable column 732 is arranged to be able to move axially relative to the sleeve 731 under the action of an external force, and has a locking position and an initial position. In the locking position, the movable column 732 is locked with the sleeve 731 and pushes the block 71 to the first position. In the initial position, the movable column 732 allows the first elastic member 72 to restore the block 71 to the second position. The unlocking member 74 is arranged in the sleeve 731, and the unlocking member 74 is arranged to be able to move relative to the sleeve 731 under the action of an external force to release the locking relationship between the movable column 732 and the sleeve 731. The second elastic member 733 is disposed between the movable column 732 and the sleeve 731, and is configured to restore the movable column 732 to the initial position when the movable column 732 is unlocked from the sleeve 731. The third elastic member 75 is disposed between the unlocking member 74 and the sleeve 731, and is configured to reset the unlocking member 74 when the external force disappears. Specifically, when installing the cleaning pad 61, the operator can press the movable column 732 to move it from the initial position to the locking position. At this time, the movable column 732 pushes the block 71 to move it to the first position and engage with the cleaning pad 61, and the movable column 732 and the sleeve 731 are in a locking relationship, so that the movable column 732 can limit the block 71 to prevent the block 71 from resetting to release the engagement. When the cleaning pad 61 needs to be replaced, the operator can operate the unlocking member 74 to release the locking relationship between the corresponding movable column 732 and the sleeve 731. At this time, the movable column 732 can be reset under the action of the second elastic member 733, that is, the movable column 732 no longer limits the block 71, and the block 71 can be restored to the second position under the action of the first elastic member 72 to release the clamping relationship between the block 71 and the cleaning pad 61, and then the operator can replace the corresponding cleaning pad 61. It should be noted that after the unlocking member 74 is unlocked, the third elastic member 75 can use its own elasticity to push the unlocking member 74 to reset it, so as to avoid the unlocking member 74 always being in the unlocking position, resulting in the inability to lock the movable column 732 and the sleeve 731, thereby affecting the function of the thrust mechanism 73.

[0046] In some embodiments, the sleeve 731 is provided with a first opening 7311 and a second opening 7312, and the first opening 7311 and the second opening 7312 are arranged at intervals from top to bottom. A slanted rod 7321 is provided on the side of the movable column 732, and a protrusion 7322 is provided at one end of the slanted rod 7321, and the slanted rod 7321 has a tendency to move the protrusion 7322 away from the movable column 732. When the movable column 732 is in the initial position, the slanted rod 7321 can make the protrusion 7322 snap into the first opening 7311, and when the movable column 732 moves downward to the locking position, the slanted rod 7321 can make the protrusion 7322 snap into the second opening 7312, thereby achieving the locking between the movable column 732 and the sleeve 731.

[0047] In some embodiments, a driving portion 7323 is provided at the lower end of the movable column 732, and the driving portion 7323 has a first inclined surface. When the movable column 732 moves axially downward in the sleeve 731, the first inclined surface is used to cooperate with the first force-bearing portion 711 to move the clamping block 71 along the radial direction of the third fixed disk 13. In this way, the function of the thrust mechanism 73 clamping the clamping block 71 and the cleaning pad 61 can be realized.

[0048] In some embodiments, the unlocking member 74 is located on the upper surface of the first fixed disk 11, and includes a support rod 741, a translation block 742, an extrusion head 743, and a pull rod 744. The support rod 741 is horizontally arranged and fixed to the outer wall of the sleeve 731. The translation block 742 is movably arranged on the support rod 741, and a third spring is arranged between the translation block 742 and the sleeve 731. The extrusion head 743 is opposite to the second opening 7312 and is located on the side of the translation block 742 facing the sleeve 731. The pull rod 744 is a U-shaped rod, and both ends of the pull rod 744 bypass the sleeve 731 to connect the translation block 742. When the operator pulls the pull rod 744, the pull rod 744 can drive the translation block 742 to move on the support rod 741 toward the sleeve 731. As the translation block 742 gradually approaches the sleeve 731, the extrusion head 743 on the translation block 742 can squeeze the protrusion 7322 located in the second opening 7312 to release the locking relationship between the movable column 732 and the sleeve 731. It should be noted that, in this embodiment, the translation block 742 is arranged in a direction perpendicular to the radial direction of the first fixed disk 11, and the moving direction of the translation block 742 is consistent with the radial direction of the first fixed disk 11.

[0049] In some embodiments, the mounting unit 7 further includes a collar 76 and a fourth spring 77; the collar 76 is disposed on the first fixed disk 11, and the collar 76 is configured to be able to rotate circumferentially relative to the first fixed disk 11 under the action of an external force, and has a first rotation position and a second rotation position, and the collar 76 is provided with a plurality of push blocks 761 along its circumference, and the push blocks 761 correspond to the unlocking members 74, and in the first rotation position, the push blocks 761 are away from the corresponding unlocking members 74, and in the second rotation position, the push blocks 761 act on the corresponding unlocking members 74 to unlock the corresponding movable column 732 and the sleeve 731; the fourth spring 77 is disposed between the collar 76 and the workbench 1, and the fourth spring 77 is configured to keep the collar 76 in the second rotation position when the external force disappears. Specifically, when all the cleaning pads 61 need to be removed, the positions of the multiple push blocks 761 can be rotated by rotating the ring 76, so that the multiple push blocks 761 can act on the corresponding unlocking parts 74 respectively, thereby releasing the clamping relationship between all the buckles and the cleaning pads 61, and then the operator can remove all the cleaning pads 61.

[0050] In some embodiments, the mounting unit 7 further includes a swivel 78 and a plurality of connecting rod mechanisms 79. The swivel 78 is disposed on the third fixed disk 13 and can rotate circumferentially relative to the third fixed disk 13. The connecting rod mechanism 79 is connected between the swivel 78 and the third fixed disk 13 and corresponds to the clamping block 71. The connecting rod mechanism 79 is configured to be deformed when the swivel 78 rotates, and has a first posture and a second posture. In the first posture, the connecting rod mechanism 79 pushes the clamping block 71 to the first position, and in the second posture, the connecting rod mechanism 79 allows the clamping block 71 to return to the second position. Specifically, by rotating the swivel 78, the postures of all the connecting rod mechanisms 79 can be changed, so that all the buckles can be moved to be clamped with the corresponding cleaning pads 61. When installing the cleaning pads 61, the operator can install all the cleaning pads 61 by operating the swivel 78, so that the installation efficiency can be improved.

[0051] In some embodiments, the rotating ring 78 is provided with a driving plate 781, which extends radially from the third fixed disk 13 to the inside of the first fixed disk 11 and the second fixed disk 12. During the installation of the cleaning pad 61, the operator can push the driving plate 781 to transmit torque to the rotating ring 78 to rotate it.

[0052] In some embodiments, the link mechanism 79 includes a straight link 791 and an arcuate link 792, wherein the first end of the straight link 791 is rotatably connected to the third fixed disk 13, the second end of the straight link 791 is rotatably connected to the first end of the arcuate link 792, and the second end of the arcuate link 792 is rotatably connected to the swivel 78. When the swivel 78 rotates circumferentially, the position of the second end of the arcuate link 792 changes, and the angle between the arcuate link 792 and the straight link 791 changes, thereby achieving deformation of the link mechanism 79.

[0053] The nuclear reactor pressure vessel inspection device of the embodiment of the present application can realize the cleaning and inspection of the inner wall of the nuclear reactor pressure vessel, and by cleaning the inner wall of the pressure vessel, it is convenient to improve the problem of unclear images during image acquisition. In addition, the nuclear reactor pressure vessel inspection device can disassemble and assemble a single cleaning pad as needed, and can also quickly disassemble and assemble all cleaning pads, and is highly convenient to operate.

[0054] One or more embodiments of this specification are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of one or more embodiments of this specification should be included in the scope of protection of this application.

[0055] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A nuclear reactor pressure vessel detection device, characterized in that: include: A workbench, which is arranged in the pressure vessel in a manner that it can be raised and lowered and rotatably disposed; A cleaning unit, comprising a plurality of cleaning pads, the cleaning pads being circumferentially arranged on the outer side surface of the workbench, and being used for cleaning the inner wall of the pressure vessel when the workbench is lifted, lowered and rotated; The detection unit includes a camera and an infrared thermal imager, wherein the camera and the infrared thermal imager are arranged on the workbench and are used to obtain image information of the inner wall of the pressure vessel when the workbench is lifted, lowered and rotated.

2. The nuclear reactor pressure vessel detection device according to claim 1, characterized in that: The cleaning pads are detachably connected to the workbenches respectively.

3. The nuclear reactor pressure vessel detection device according to claim 2, characterized in that: Also includes: The mounting unit is used to detachably mount the cleaning pad on the workbench.

4. The nuclear reactor pressure vessel detection device according to claim 3, characterized in that: The mounting unit includes a plurality of clamping blocks, which are arranged on the workbench and correspond to the cleaning pad. The clamping blocks are arranged to be able to move radially along the workbench under the action of an external force, and have a first position and a second position. When in the first position, the clamping block is clamped with the cleaning pad, and when in the second position, the clamping block is released from the cleaning pad.

5. The nuclear reactor pressure vessel detection device according to claim 4, characterized in that: The cleaning pad is provided with a positioning opening, and the positioning opening is used to cooperate with a positioning block arranged on the workbench to perform installation and positioning.

6. The nuclear reactor pressure vessel detection device according to claim 4, characterized in that: One end of the cleaning pad is provided with a slot, and the other end is provided with a socket matching the slot, and two adjacent cleaning pads are connected through the slot and the socket.

7. The nuclear reactor pressure vessel detection device according to claim 4, characterized in that: The mounting unit also includes a plurality of thrust mechanisms and a plurality of first elastic members; the thrust mechanisms are arranged on the workbench and correspond to the blocking block, and the thrust mechanisms are used to act on the blocking block to make it move radially along the workbench; the first elastic member is connected between the blocking block and the workbench, and the first elastic member is configured to restore the blocking block to the second position when the external force disappears.

8. The nuclear reactor pressure vessel detection device according to claim 7, characterized in that: The thrust mechanism comprises a sleeve, a movable column, an unlocking member, a second elastic member and a third elastic member; the sleeve is arranged on the workbench; the movable column is arranged in the sleeve, the movable column is arranged to be able to move axially relative to the sleeve under the action of an external force, and has a locking position and an initial position, in which the movable column is locked with the sleeve and pushes the block to the first position, and in the initial position, the movable column allows the first elastic member to restore the block to the second position; the unlocking member is arranged on the sleeve, the unlocking member is arranged to be able to move relative to the sleeve under the action of an external force to release the locking relationship between the movable column and the sleeve; The second elastic member is disposed between the movable column and the sleeve, and the second elastic member is configured to restore the movable column to the initial position when the movable column and the sleeve are unlocked; The third elastic member is disposed between the unlocking member and the sleeve, and the third elastic member is configured to reset the unlocking member when the external force disappears.

9. The nuclear reactor pressure vessel detection device according to claim 8, characterized in that: The mounting unit also includes a collar and a fourth spring; the collar is arranged on the workbench, the collar is arranged to be able to rotate circumferentially relative to the workbench under the action of external force, and has a first rotation position and a second rotation position, the collar is provided with a plurality of push blocks along its circumference, the push blocks correspond to the unlocking members, in the first rotation position, the push blocks are away from the corresponding unlocking members, in the second rotation position, the push blocks act on the corresponding unlocking members to unlock the corresponding movable column and the sleeve; the fourth spring is arranged between the collar and the workbench, the fourth spring is arranged to keep the collar in the second rotation position when the external force disappears.

10. The nuclear reactor pressure vessel detection device according to claim 4, characterized in that: The mounting unit also includes a swivel and a plurality of connecting rod mechanisms; the swivel is disposed on the workbench and can rotate circumferentially relative to the workbench; the connecting rod mechanism is connected between the swivel and the workbench and corresponds to the block, and the connecting rod mechanism is configured to be deformable when the swivel rotates, and has a first posture and a second posture, in the first posture, the connecting rod mechanism pushes the block to the first position, and in the second posture, the connecting rod mechanism allows the block to return to the second position.

Images