Nuclear power plant penetration piece outer wall inspection device

Abstract

The invention discloses a nuclear power plant penetration piece outer wall inspection device which comprises a detection mechanism, a pressing mechanism, a lifting mechanism and an avoiding mechanism. According to the nuclear power plant penetration piece outer wall inspection device, the avoiding mechanism is arranged, the pressing mechanism, the detection mechanism and the lifting mechanism can be driven to do radial horizontal movement, so that avoiding of a horn cover structure of a pressure container is achieved, the lifting mechanism is arranged, the detection mechanism can be driven to do axial lifting movement, and the detection efficiency is improved. The detection mechanism can move up and down and have the scanning function, automatic scanning of the outer wall at different heights is achieved, meanwhile, by arranging the pressing mechanism, the detection mechanism can be pressed on the outer wall of the penetration piece in the radial direction, the scanning effectiveness of the detection mechanism is improved, and the detection efficiency is improved. The nuclear power plant penetration piece outer wall inspection device solves the problem that the penetration piece outer wall is uneven and difficult to scan due to an intersection line.

Description

Technical Field

[0001] The invention relates to the field of nuclear power plant reactor pressure vessel maintenance, and in particular to a nuclear power plant penetration piece outer wall inspection device. Background Art

[0002] The reactor pressure vessel cover of a nuclear power plant is the core equipment of the nuclear reactor, and its main part is hemispherical. Figure 4 As shown, a number of penetrations 51 are installed on the top cover 54 through corresponding holes, and irregular intersection lines are formed between the top cover 54 and the penetrations 51, so that the outer surface of the penetrations 51 is of different heights, which makes scanning difficult. In addition, a thermal sleeve 52 is installed inside the penetration 51, and each end of the thermal sleeve 52 has a horn cover 53 structure, and the diameter of the horn cover 53 is larger than the outer diameter of the penetration 51. At the same time, due to the influence of the surrounding horn cover 53 structure, the inspection mechanism needs to avoid the limited space in the radial direction. At present, there is a lack of relevant penetration outer wall inspection devices. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide an outer wall inspection device for penetration parts of a nuclear power plant.

[0004] The technical solution adopted by the present invention to solve the technical problem is: constructing a nuclear power plant penetration outer wall inspection device, which includes a detection mechanism, a pressing mechanism, a lifting mechanism and an avoidance mechanism;

[0005] The detection mechanism is used to scan the outer wall of the penetration piece;

[0006] The clamping mechanism is connected to the detection mechanism and is used to drive the detection mechanism to perform radial horizontal movement;

[0007] The lifting mechanism is connected to the clamping mechanism and is used to drive the clamping mechanism and the detection mechanism to perform axial lifting movement;

[0008] The avoidance mechanism is connected to the lifting mechanism and is used to drive the pressing mechanism, the detection mechanism and the lifting mechanism to perform radial horizontal movement.

[0009] In some embodiments, the avoidance mechanism includes a mounting seat, an avoidance drive connected to the mounting seat, a avoidance positioning block connected to the output end of the avoidance drive, and a avoidance motion block fixedly connected to the avoidance positioning block, and the avoidance motion block is movably connected to the mounting seat and can move along the radial direction of the mounting seat.

[0010] In some embodiments, the number of the avoidance drivers and the number of the avoidance positioning blocks are both two, and the two avoidance drivers and the two avoidance positioning blocks are symmetrically distributed about the central axis of the mounting seat.

[0011] In some embodiments, the lifting mechanism includes a lifting mounting block fixedly connected to the avoidance motion block, a lifting drive fixedly connected to the lifting mounting block, a first transmission gear connected to the output end of the lifting drive, a transmission belt transmission-connected to the first transmission gear, a second transmission gear transmission-connected to the transmission belt, a screw fixedly connected to the second transmission gear, and a screw nut transmission-connected to the screw.

[0012] In some embodiments, the lifting mechanism further includes a guide rail fixedly connected to the screw nut, a slider movably connected to the guide rail, and a lifting fixed block fixedly connected to the guide rail, and the slider is fixedly connected to the avoidance positioning block.

[0013] In some embodiments, the number of the guide rails and the number of the sliders are both two, and the two guide rails and the two sliders are symmetrically distributed about the central axis of the mounting seat.

[0014] In some embodiments, the clamping mechanism includes a clamping driver fixedly connected to the lifting and fixing block, a clamping positioning block connected to the output end of the clamping driver, and a clamping guide rod fixedly connected to the clamping positioning block. The lifting mechanism also includes a lifting and moving block fixedly connected to the clamping driver.

[0015] In some embodiments, the detection mechanism includes a probe clamping block movably connected to the pressing guide rod, a probe hinged to the probe clamping block, and a contact fixedly connected to the probe clamping block;

[0016] The probe clamping block is connected to the pressing guide rod through a limiting piece.

[0017] In some embodiments, the clamping mechanism further includes an elastic member, which is sleeved on the outside of the clamping guide rod, one end of the elastic member is connected to the clamping positioning block, and the other end of the elastic member is connected to the limiting member.

[0018] In some embodiments, the detection mechanism further includes a switch positioning block fixedly connected to the lifting motion block and a proximity switch fixedly connected to the switch positioning block;

[0019] The setting height of the proximity switch is lower than the setting height of the contact.

[0020] The implementation of the present invention has the following beneficial effects: the nuclear power plant penetration outer wall inspection device can drive the clamping mechanism, the detection mechanism and the lifting mechanism to perform radial horizontal movement by arranging an avoidance mechanism, thereby achieving avoidance of the trumpet cover structure of the pressure vessel, and by arranging a lifting mechanism, the detection mechanism can be driven to perform axial lifting movement, and the up and down movement and scanning function of the detection mechanism can be realized, and automatic scanning of the outer wall at different heights is realized. At the same time, by arranging a clamping mechanism, the detection mechanism can be pressed on the outer wall of the penetration member in the radial direction, thereby improving the effectiveness of the scanning of the detection mechanism. The nuclear power plant penetration outer wall inspection device solves the problem that the outer wall of the penetration member is uneven and difficult to scan due to the intersection line. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 is a schematic diagram of the overall structure of an outer wall inspection device for a nuclear power plant penetration in some embodiments of the present invention;

[0023] Figure 2 is a schematic diagram of the overall structure of the outer wall inspection device of a nuclear power plant penetration in some embodiments of the present invention from another direction;

[0024] Figure 3 is a schematic diagram of the internal structure of an outer wall inspection device for a nuclear power plant penetration in some embodiments of the present invention;

[0025] Figure 4 It is a schematic diagram of the application of the nuclear power plant penetration outer wall inspection device in some embodiments of the present invention. DETAILED DESCRIPTION

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

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

[0028] See also Figures 1 to 4 , is a nuclear power plant penetration outer wall inspection device in some embodiments of the present invention, which includes a detection mechanism 1, a clamping mechanism 2, a lifting mechanism 3 and an avoidance mechanism 4. The detection mechanism 1 is used to scan the outer wall of the penetration 51, the clamping mechanism 2 is connected to the detection mechanism 1, and is used to drive the detection mechanism 1 to perform radial horizontal movement; the lifting mechanism 3 is connected to the clamping mechanism 2, and is used to drive the clamping mechanism 2 and the detection mechanism 1 to perform axial lifting movement; the avoidance mechanism 4 is connected to the lifting mechanism 3, and is used to drive the clamping mechanism 2, the detection mechanism 1 and the lifting mechanism 3 to perform radial horizontal movement.

[0029] It can be understood that the nuclear power plant penetration outer wall inspection device can drive the clamping mechanism 2, the detection mechanism 1 and the lifting mechanism 3 to perform radial horizontal movement by setting the avoidance mechanism 4, so as to achieve avoidance of the horn cover 53 structure of the pressure vessel, and by setting the lifting mechanism 3, the detection mechanism 1 can be driven to perform axial lifting movement, and the up and down movement and scanning function of the detection mechanism 1 can be realized, and automatic scanning of the outer wall at different heights is realized. At the same time, by setting the clamping mechanism 2, the detection mechanism 1 can be pressed on the outer wall of the penetration 51 in the radial direction, thereby improving the effectiveness of the scanning of the detection mechanism 1. The nuclear power plant penetration outer wall inspection device solves the problem that the outer wall of the penetration 51 is uneven and difficult to scan due to the intersection line.

[0030] like Figure 1 and Figure 2As shown, the avoidance mechanism 4 includes a mounting seat 41, an avoidance driver 42 connected to the mounting seat 41, a avoidance positioning block 43 connected to the output end of the avoidance driver 42, and a avoidance motion block 44 fixedly connected to the avoidance positioning block 43, and the avoidance motion block 44 is movably connected to the mounting seat 41 and can move along the radial direction of the mounting seat 41. The mounting seat 41 can be fixed on a connection structure on site, such as a rotating mechanism. The avoidance driver 42 is preferably a cylinder, and the avoidance positioning block 43 and the avoidance motion block 44 can be connected by bolts. The avoidance motion block 44 is specifically located below the avoidance positioning block 43, and the avoidance positioning block 43 and the avoidance motion block 44 are vertically arranged. The mounting seat 41 is also provided with a guide portion matching the bottom plate of the avoidance motion block 44, so that the avoidance motion block 44 can move along the radial direction of the mounting seat 41. When the mounting seat 41 is fixed, the avoidance driver 42 can be pushed out and retracted to drive the avoidance positioning block 43 and the avoidance movement block 44 to move radially along the penetration piece 51, thereby achieving avoidance of the trumpet cover 53 structure of the pressure vessel.

[0031] In this embodiment, the number of the avoidance driver 42 and the avoidance positioning block 43 are both two, and the two avoidance drivers 42 and the avoidance positioning blocks 43 are symmetrically distributed about the central axis of the mounting seat 41. The arrangement of the two avoidance drivers and the avoidance positioning blocks 43 can make the transmission of the avoidance driver 42 more stable. The two avoidance positioning blocks 43 are connected by a connecting plate.

[0032] like Figure 1 and Figure 2 As shown, the lifting mechanism 3 includes a lifting installation block 31 fixedly connected to the avoidance motion block 44, a lifting driver 32 fixedly connected to the lifting installation block 31, a first transmission gear 33 connected to the output end of the lifting driver 32, a transmission belt 34 transmission-connected to the first transmission gear 33, a second transmission gear 35 transmission-connected to the transmission belt 34, a screw rod 36 fixedly connected to the second transmission gear 35, and a screw rod nut 37 transmission-connected to the screw rod 36. It can be understood that the lifting installation block 31 is specifically installed at the middle position of the avoidance motion block 44, and the lifting driver 32 is preferably a driving motor, and the lifting driver 32 can drive the screw rod 36 to perform a rotational motion, so that the screw rod nut 37 can perform an axial lifting motion.

[0033] Furthermore, the lifting mechanism 3 further includes a guide rail 38 fixedly connected to the screw nut 37, a slider 39 movably connected to the guide rail 38, and a lifting fixed block 301 fixedly connected to the guide rail 38, and the slider 39 is fixedly connected to the avoidance positioning block 43. The guide rail 38 is arranged along the axial direction of the inspection device, and can be connected to the screw nut 37 by bolts. The guide rail 38 and the screw nut 37 are arranged vertically. The slider 39 can also be connected to the avoidance positioning block 43 by bolts. In this embodiment, the number of the guide rail 38 and the slider 39 is two, and the two guide rails 38 and the slider 39 are symmetrically distributed about the central axis of the mounting seat 41, which ensures the stability of the lifting mechanism 3 when working, and the lifting fixed block 301 is connected to the two guide rails 38 at the same time. When the lifting driver 32 is working, it can drive the screw nut 37, the guide rail 38 and the lifting fixed block 301 to perform axial lifting movement, which can realize the axial lifting movement and scanning of the detection mechanism 1.

[0034] Recombination Figure 3 As shown, the clamping mechanism 2 includes a clamping driver 21 fixedly connected to a lifting fixed block 301, a clamping positioning block 22 connected to the output end of the clamping driver 21, and a clamping guide rod 23 fixedly connected to the clamping positioning block 22. The lifting mechanism 3 also includes a lifting motion block 302 fixedly connected to the clamping driver 21. The clamping driver 21 is preferably a clamping cylinder, and the clamping driver 21 can drive the clamping positioning block 22 to perform radial horizontal motion.

[0035] For example Figures 1 to 3 As shown, the detection mechanism 1 includes a probe clamping block 11 movably connected to the pressing guide rod 23, a probe 12 hinged to the probe clamping block 11, and a contact 13 fixedly connected to the probe clamping block 11. The probe clamping block 11 is connected to the pressing guide rod 23 through a stopper 14. The probe 12 can be hinged to the probe clamping block 11 through a rotating shaft. It can be understood that the probe clamping block 11 can move along the axial direction of the pressing guide rod 23, and the probe 12 is hinged to the probe clamping block 11, so that the probe 12 can be automatically adjusted according to the different shapes of the penetration member 51, thereby improving the effectiveness of the probe 12 scanning. When the probe 12 is driven to a predetermined position by the lifting driver 32, the pressing driver 21 can press the probe 12 against the outer wall of the penetration member 51 in the radial direction, thereby improving the effectiveness of the probe 12 scanning.

[0036] In addition, the clamping mechanism 2 further includes an elastic member 24, which is sleeved on the outer side of the clamping guide rod 23, one end of the elastic member 24 is connected to the clamping positioning block 22, and the other end of the elastic member 24 is connected to the limit member 14. The detection mechanism 1 further includes a switch positioning block 15 fixedly connected to the lifting movement block 302 and a proximity switch 16 fixedly connected to the switch positioning block 15, the setting height of the proximity switch 16 is lower than the setting height of the contact 13, and the proximity switch 16 is located below the contact 13.

[0037] It can be understood that when the lifting drive 32 drives the probe 12 to rise and the top of the probe 12 contacts the inner surface of the top cover 54, the contact 13 no longer moves, the proximity switch 16 continues to move upward, and the elastic member 24 continues to be compressed. When the proximity switch 16 moves upward to the sensing distance of the proximity switch 16, the proximity switch 16 is activated and sends a stop signal to the lifting drive 32, so that the probe 12 can achieve safe and effective scanning. The elastic member 24 can provide a reset function between the probe clamping block 11 and the clamping positioning block 22. When the lifting drive 32 drives the probe 12 to descend, the relative position between the probe clamping block 11 and the clamping positioning block 22 is restored to the initial position. The elastic member 24 can also maintain a certain distance between the probe clamping block 11 and the clamping positioning block 22 when they are in the initial position. The number of the elastic members 24 is preferably two, and the elastic member 24 is preferably a spring.

[0038] The working principle of the nuclear power plant penetration outer wall inspection device is:

[0039] 1. Before scanning the outer wall of the penetration piece 51, the avoidance driver 42 and the clamping driver 21 are both in the retracted state, and the inspection device can smoothly pass through the position of the horn cover 53;

[0040] 2. When the height of the inspection device exceeds the height of the horn cover 53, the avoidance driver 42 and the pressing driver 21 are activated in sequence to press the probe 12 against the outer wall of the penetration member 51;

[0041] 3. The lifting driver 32 drives the probe 12 to move upward. When the top of the probe 12 contacts the inner surface of the top cover 54, the contact 13 stops moving and the proximity switch 16 continues to move upward until the contact 13 reaches the sensing distance of the proximity switch 16. At this time, the proximity switch 16 is activated and sends a stop signal to the lifting driver 32, and the probe 12 starts scanning;

[0042] 4. The lifting driver 32 drives the probe 12 to move downward to scan positions at different heights of the penetration piece 51;

[0043] 5. The inspection device moves along the circumferential direction of the penetration piece 51 for a certain angle and then continues to scan;

[0044] 6. Repeat the above steps until the entire outer wall of the penetration piece 51 is scanned.

[0045] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A nuclear power plant penetration outer wall inspection device, characterized in that: It comprises a detection mechanism (1), a pressing mechanism (2), a lifting mechanism (3) and an avoidance mechanism (4); The detection mechanism (1) is used to scan the outer wall of the penetration member (51); The pressing mechanism (2) is connected to the detection mechanism (1) and is used to drive the detection mechanism (1) to perform radial horizontal movement; The lifting mechanism (3) is connected to the pressing mechanism (2) and is used to drive the pressing mechanism (2) and the detection mechanism (1) to perform axial lifting movement; The avoidance mechanism (4) is connected to the lifting mechanism (3) and is used to drive the pressing mechanism (2), the detection mechanism (1) and the lifting mechanism (3) to perform radial horizontal movement.

2. The nuclear power plant penetration outer wall inspection device according to claim 1, characterized in that: The avoidance mechanism (4) comprises a mounting seat (41), an avoidance driver (42) connected to the mounting seat (41), an avoidance positioning block (43) connected to an output end of the avoidance driver (42), and an avoidance motion block (44) fixedly connected to the avoidance positioning block (43); the avoidance motion block (44) is movably connected to the mounting seat (41) and can move along the radial direction of the mounting seat (41).

3. The nuclear power plant penetration outer wall inspection device according to claim 2, characterized in that: The number of the avoidance drivers (42) and the number of the avoidance positioning blocks (43) are both two, and the two avoidance drivers (42) and the two avoidance positioning blocks (43) are symmetrically distributed about the central axis of the mounting seat (41).

4. The nuclear power plant penetration outer wall inspection device according to claim 2, characterized in that: The lifting mechanism (3) comprises a lifting installation block (31) fixedly connected to the avoidance motion block (44), a lifting driver (32) fixedly connected to the lifting installation block (31), a first transmission gear (33) connected to the output end of the lifting driver (32), a transmission belt (34) transmission-connected to the first transmission gear (33), a second transmission gear (35) transmission-connected to the transmission belt (34), a screw rod (36) fixedly connected to the second transmission gear (35), and a screw rod nut (37) transmission-connected to the screw rod (36).

5. The nuclear power plant penetration outer wall inspection device according to claim 4, characterized in that: The lifting mechanism (3) further comprises a guide rail (38) fixedly connected to the screw nut (37), a slider (39) movably connected to the guide rail (38), and a lifting fixed block (301) fixedly connected to the guide rail (38); the slider (39) is fixedly connected to the avoidance positioning block (43).

6. The nuclear power plant penetration outer wall inspection device according to claim 5, characterized in that: The number of the guide rails (38) and the number of the sliders (39) are both two, and the two guide rails (38) and the two sliders (39) are symmetrically distributed about the central axis of the mounting seat (41).

7. The nuclear power plant penetration outer wall inspection device according to claim 5, characterized in that: The clamping mechanism (2) comprises a clamping driver (21) fixedly connected to the lifting and fixing block (301), a clamping positioning block (22) connected to the output end of the clamping driver (21), and a clamping guide rod (23) fixedly connected to the clamping positioning block (22); the lifting mechanism (3) further comprises a lifting and moving block (302) fixedly connected to the clamping driver (21).

8. The nuclear power plant penetration outer wall inspection device according to claim 7, characterized in that: The detection mechanism (1) comprises a probe clamping block (11) movably connected to the pressing guide rod (23), a probe (12) hinged to the probe clamping block (11), and a contact (13) fixedly connected to the probe clamping block (11); The probe clamping block (11) is connected to the pressing guide rod (23) via a limiting member (14).

9. The nuclear power plant penetration outer wall inspection device according to claim 8, characterized in that: The clamping mechanism (2) further comprises an elastic member (24), wherein the elastic member (24) is sleeved on the outside of the clamping guide rod (23), one end of the elastic member (24) is connected to the clamping positioning block (22), and the other end of the elastic member (24) is connected to the limiting member (14).

10. The nuclear power plant penetration outer wall inspection device according to claim 8, characterized in that: The detection mechanism (1) further comprises a switch positioning block (15) fixedly connected to the lifting movement block (302) and a proximity switch (16) fixedly connected to the switch positioning block (15); The setting height of the proximity switch (16) is lower than the setting height of the contact (13).

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