CN111175304B - Fuel assembly inspection device - Google Patents
Fuel assembly inspection device Download PDFInfo
- Publication number
- CN111175304B CN111175304B CN202010002914.7A CN202010002914A CN111175304B CN 111175304 B CN111175304 B CN 111175304B CN 202010002914 A CN202010002914 A CN 202010002914A CN 111175304 B CN111175304 B CN 111175304B
- Authority
- CN
- China
- Prior art keywords
- spring
- assembly
- fuel assembly
- rotating
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8851—Scan or image signal processing specially adapted therefor, e.g. for scan signal adjustment, for detecting different kinds of defects, for compensating for structures, markings, edges
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/01—Arrangements or apparatus for facilitating the optical investigation
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/94—Investigating contamination, e.g. dust
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Engineering & Computer Science (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Signal Processing (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Abstract
The invention provides a fuel assembly inspection device, comprising: a column; the component supporting seat is connected with the side surface of the upright column and is used for supporting a fuel component; and the appearance inspection mechanism is arranged above the assembly supporting seat, is connected with the side surface of the upright post in a mode of moving back and forth along the axial direction of the upright post, and is used for acquiring the circumferential condition of the fuel assembly in real time in the process of moving along a preset track. According to the invention, the appearance inspection mechanism can acquire the peripheral condition of the fuel assembly in real time in the process of moving back and forth along the upright column, the assembly inspection operation can be automatically realized without approaching personnel, the real condition of the appearance of the fuel assembly is acquired, and the personnel are prevented from being irradiated by rays.
Description
Technical Field
The invention relates to the technical field of nuclear fuel, in particular to a fuel assembly inspection device.
Background
In the field of nuclear fuel, appearance inspection of fuel assemblies is the last process of assembly production and is one of important steps for ensuring qualified products to leave factories. Due to strong radioactivity of the MOX fuel assembly, personnel cannot approach the assembly to directly and visually inspect the appearance of the assembly, so that the real condition of the appearance of the assembly cannot be reflected by an inspection result.
Therefore, there is a need in the art for a device that can be separated from manual work and perform automatic assembly visual inspection.
Disclosure of Invention
The present invention has been made to solve, at least in part, the technical problems occurring in the prior art.
The technical scheme adopted for solving the technical problem of the invention is as follows:
the invention provides a fuel assembly inspection device, comprising:
a column;
the component supporting seat is connected with the side surface of the upright column and is used for supporting a fuel component;
and the number of the first and second groups,
and the appearance inspection mechanism is arranged above the assembly supporting seat, is connected with the side surface of the upright post in a mode of moving back and forth along the axial direction of the upright post, and is used for acquiring the circumferential condition of the fuel assembly in real time in the process of moving along a preset track.
Optionally, the visual inspection mechanism comprises:
the end part of the first support frame is connected with the side surface of the upright post in a manner of moving back and forth along the axial direction of the upright post;
the first turntable is arranged on the first support frame, through holes for enabling the fuel assemblies to penetrate through are formed in the first support frame and the first turntable, and the upper surface of the first turntable can rotate around the fuel assemblies; and (c) a second step of,
the first cameras are arranged on the upper surface of the first rotary table and used for shooting the circumferential surface of the fuel assembly in real time in the process of rotating under the driving of the first rotary table and in the process of moving axially along the upright under the driving of the first support frame.
Optionally, the visual inspection mechanism further comprises:
a plurality of wiping blocks disposed on an upper surface of the first turntable proximate to a fuel assembly passing through the first turntable.
Optionally, the visual inspection mechanism further comprises:
and the fuel assembly clamping mechanism is arranged at the bottom through hole of the first support frame and used for clamping and loosening the fuel assembly.
Optionally, the upright comprises:
erecting a frame;
the two sliding rails are arranged on the side surface of the vertical frame in parallel;
the screw rod assembly is arranged between the two slide rails;
the two bearing assemblies are respectively sleeved at the two ends of the lead screw assembly and are connected with the side surface of the vertical frame;
the mounting plate is sleeved on the lead screw assembly and is in threaded connection with the lead screw assembly, and the mounting plate is also in sliding connection with the two sliding rails; and the number of the first and second groups,
the screw rod driving mechanism is connected with the end part of the screw rod assembly and is used for driving the screw rod assembly to rotate so as to drive the mounting plate to slide back and forth along the two slide rails;
wherein the visual inspection mechanism is provided on the mounting plate.
Optionally, the apparatus further comprises:
a spring flexibility inspection mechanism disposed below the assembly support base;
the assembly support seat is provided with a through hole for the fuel assembly to pass through, and after the bottom of the fuel assembly passes through the through hole on the assembly support seat downwards, a pin sealing spring of the fuel assembly extends into the spring flexibility inspection mechanism;
the spring flexibility inspection mechanism is used for respectively compressing and stretching the pin sealing spring of the fuel assembly for a preset length and then loosening the pin sealing spring, and acquiring the recovery condition of the spring.
Optionally, the spring flexibility checking mechanism comprises:
the base comprises a columnar boss, and the side surface of the columnar boss is provided with an external thread;
the first rotating sleeve is sleeved on the columnar boss, and the inner surface of the first rotating sleeve is provided with an internal thread matched with the external thread of the side surface of the columnar boss;
the rotating support is provided with a through hole which penetrates through the whole body and enables the spring to penetrate through, the bottom of the rotating support is connected with the top of the first rotating sleeve, and the through holes of the rotating support and the first rotating sleeve are coaxially arranged;
the spring clamping mechanism is arranged at the through hole at the top of the rotating bracket and used for clamping and loosening the spring;
the rotating sleeve driving mechanism is connected with the first rotating sleeve and used for driving the first rotating sleeve to rotate clockwise and anticlockwise along a preset track, so that the columnar lug boss moves upwards relative to the first rotating sleeve to compress the spring and moves downwards to stretch the spring when the spring is clamped; and the number of the first and second groups,
and the second cameras are arranged in the rotating support, are close to the bottom through hole of the rotating support and are used for shooting the circumferential surface of the spring after the spring is compressed and stretched and is loosened so as to obtain the recovery condition of the spring.
Optionally, the pitch of the internal thread of the first rotating sleeve and the pitch of the external thread of the columnar protruding portion of the seat body are consistent with the pitch of the spring.
Optionally, the spring flexibility checking mechanism further comprises:
the upper surface of the second rotary table can rotate around the fuel assembly, and the upper surface of the second rotary table is connected with the bottom of the base body and used for driving the whole spring flexibility checking mechanism to rotate until a second camera in the rotary support is over against the free end of the spring before the spring is compressed and stretched.
Optionally, the assembly support seat comprises:
the end part of the second support frame is connected with the side surface of the upright post, and a through hole is formed in the second support frame;
the rotating assembly penetrates through the through hole of the second support frame and is fixed at the through hole, and the rotating assembly is provided with a through hole for the fuel assembly to penetrate through and can rotate along with the fuel assembly; and (c) a second step of,
a support ring disposed on the rotating assembly.
Optionally, the rotating assembly comprises:
the self-aligning bearing is arranged on the through hole of the second supporting frame;
a thrust bearing disposed below the through hole of the second support frame;
the second rotating sleeve sequentially penetrates through the self-aligning bearing, the second supporting frame and the thrust bearing from top to bottom; and the number of the first and second groups,
and the nut is arranged below the thrust bearing and is in threaded connection with the bottom of the second rotating sleeve.
Optionally, the assembly support seat further comprises:
the upper dust cover covers the support ring and the part of the rotating assembly, which is positioned above the through hole, and is connected with the upper surface of the second support frame; and the number of the first and second groups,
and the lower dust cover covers the part of the rotating component below the through hole and is connected with the lower surface of the second support frame.
Has the advantages that:
the fuel assembly inspection device can automatically realize the functions of appearance inspection of the fuel assembly, flexibility inspection of the pin sealing spring and wiping of oil stains on the peripheral surface of the assembly; moreover, the whole device adopts a modular design, so that the device is stronger in applicability and convenient to mount and dismount.
Drawings
FIG. 1 is an isometric view of a fuel assembly inspection device provided by an embodiment of the present invention;
FIG. 2 is an exploded view of the spring compliance checking mechanism of FIG. 1;
FIG. 3 is an exploded view of the assembly support base of FIG. 1;
FIG. 4 is an isometric view of the column of FIG. 1;
fig. 5 is a disassembled view of the visual inspection mechanism of fig. 1.
In the figure: 1-a base; 2-spring flexibility checking mechanism; 21-a second turntable; 22-a seat body; 23-a bull gear; 24-a first rotating sleeve; 25-a second camera mount; 26-a second camera; 27-a rotating holder; 28-spring clamp; 29-a second cylinder; 210-a pinion gear; 211-a scaffold; 212-a second reducer; 213-a second motor; 3-a component support seat; 31-a lower dust cover; 32-a nut; 33-a thrust bearing; 34-a second support; 35-self-aligning bearings; 36-a second rotating sleeve; 37-support ring; 38-upper dust cover; 4-a fuel assembly; 5-upright posts; 51-a vertical frame; 52-a first reducer; 53-a first motor; 54-a bearing assembly; 55-a lead screw assembly; 56-sliding rails; 57-a mounting plate; 6-appearance inspection mechanism; 61-a component holder; 62-a first cylinder; 63-a first support frame; 64-a first turntable; 65-a first camera mount; 66-a first camera; 67-wiping the support; 68-wiping block; 7-assembly of the gripper.
Detailed Description
In order to make the technical solutions of the present invention better understood, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflicting with each other.
In the description of the present invention, it is to be understood that the orientations and positional relationships indicated by the various positional terms are based on the orientations and positional relationships shown in the drawings only for the convenience of describing the present invention and for the simplicity of description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection unless otherwise specifically stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless expressly stated or limited otherwise, the recitation of a first feature "on" or "under" a second feature may include the recitation of the first and second features being in direct contact, and may also include the recitation that the first and second features are not in direct contact, but are in contact via another feature between them. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The embodiment of the invention provides a fuel assembly inspection device, which is used for automatically inspecting the appearance of an assembly.
As shown in fig. 1, the fuel assembly inspection apparatus includes: base 1, subassembly supporting seat 3, stand 5 and visual inspection mechanism 6.
Wherein, the base 1 is a supporting part of the whole device; the upright post 5 is arranged on the base 1; the component supporting seat 3 is connected with the side surface of the upright post 5 and is used for supporting the fuel component 4; the appearance inspection mechanism 6 is arranged above the assembly supporting seat 3, is connected with the same side face of the upright post 5 in a mode of moving back and forth along the axial direction of the upright post, and is used for acquiring the circumferential condition of the fuel assembly 4 in real time in the process of moving along a preset track.
In this embodiment, outward appearance inspection mechanism can obtain the global condition of fuel assembly in real time along stand round trip movement's in-process, need not personnel and be close to just can realize the subassembly inspection operation automatically, obtains the true condition of fuel assembly outward appearance, avoids personnel to receive the ray irradiation.
Specifically, as shown in fig. 5, the appearance inspection mechanism 6 includes: a first support frame 63, a first turntable 64 and a number of first cameras 66. The number of the first cameras 66 can be set by those skilled in the art according to the cross-sectional size of the fuel assembly 4, and two first cameras 66 are used in the present embodiment, but the present invention is not limited thereto, and a greater or lesser number of first cameras should be within the scope of the present invention.
Wherein, the end of the first supporting frame 63 is connected with the side of the upright post 5 in a way of moving back and forth along the axial direction; the first turntable 64 is disposed (fixed) on the first support frame 63, and the first support frame 63 and the first turntable 64 are both provided with through holes through which the fuel assemblies 4 pass, while the upper surface of the first turntable 64 is capable of freely rotating 360 ° around the fuel assemblies; the first camera 66 is disposed on the upper surface of the first rotating platform 64, and is configured to photograph the circumferential surface of the fuel assembly 4 in real time in the process of being driven by the first rotating platform 64 to rotate and in the process of being driven by the first supporting frame 63 to move axially along the upright post 5.
The first camera 66 can also be connected with an upper computer, and transmits the image shot by the upper computer to the upper computer; the upper computer receives the images shot by the first cameras 66, then splices the received images to obtain the peripheral images of the whole fuel assembly, and then automatically identifies the defects of scratches, oil stains, corrosion and the like on the surface of the fuel assembly.
In order to more fully photograph the circumferential surface of the fuel assembly 4, in the present embodiment, two first cameras 66 are symmetrically disposed with respect to the fuel assembly 4.
Furthermore, in order to make the first camera shooting more smooth, the appearance inspection mechanism 6 further includes: a plurality of first camera brackets 65, each first camera 66 being disposed (fixed) on one first camera bracket 65; the first camera mount 65 is fixed to the upper surface of the first turntable 64. When two first cameras 66 are employed, two first camera brackets 65 are also employed, and the two first camera brackets 65 are also disposed symmetrically with respect to the fuel assembly 4.
In some embodiments, the visual inspection mechanism 6 further comprises: and a fuel assembly holding mechanism provided at the bottom through hole of the first support frame 63 for holding and releasing the fuel assembly 4.
Specifically, as shown in fig. 5, the fuel assembly holding mechanism includes: two assembly clamps 61 and two assembly clamp drive mechanisms. In the present embodiment, the first cylinder 62 is used as the driving mechanism of the assembly fixture, but other driving mechanisms may be used, and the invention is not limited thereto.
Wherein, the two assembly clamps 61 are oppositely arranged at the periphery of the bottom through hole of the first support frame 63; two first cylinders 62 are fixed at the bottom of the first support frame 63 and respectively connected with the two assembly clamps 61, and are used for driving the two assembly clamps 61 to move towards and away from each other, so as to clamp and release the fuel assembly 4.
In the appearance inspection mechanism 6, the assembly clamp 61 and the first cylinder 62 are arranged, so that the fuel assembly 4 can be clamped when the first camera 66 rotates to shoot the periphery of the fuel assembly 4, and the situation that the shot picture shakes due to shaking of the fuel assembly 4 is avoided.
In the nuclear fuel field, a person cannot approach the component for wiping when the appearance of the component is inspected, such as when the presence of impurities such as oil stains is found.
To solve this problem, the appearance inspection mechanism 6 according to the present embodiment further includes: a plurality of wiping blocks 68. The number of the wiping blocks 68 can be set by a person skilled in the art according to the cross-sectional size of the fuel assembly 4, and two wiping blocks 68 are used in the present embodiment, but the present invention is not limited thereto, and a greater or lesser number of wiping blocks should be within the scope of the present invention.
The wiping block 68 is arranged on the upper surface of the first rotating table 64 and is close to the fuel assemblies 4 passing through the first rotating table 64, so that the wiping block 68 can rotationally wipe the peripheral surfaces of the fuel assemblies 4 in the process of being driven by the first rotating table 64 to rotate and in the process of being driven by the first supporting frame 63 to axially move along the upright post 5, and the purpose of removing oil stains on the surfaces of the fuel assemblies is achieved; in addition, in the wiping process, the wiping effect can be observed in real time through the first camera 66, and if a certain position is not wiped cleanly, the wiping block 68 can be controlled to wipe the position repeatedly, so that the wiping efficiency is high.
In order to clean the circumferential surface of the fuel assembly 4 more thoroughly, in the present embodiment, two wiping pieces 68 are arranged symmetrically with respect to the fuel assembly 4. The material of the wipes 68 may be a resilient soft material and may conform to the shape of the fuel assembly.
Furthermore, in order to increase the strength of the wiping piece 68, the appearance inspection mechanism 6 further comprises: a plurality of wiping supports 67, each wiping block 68 being arranged on one wiping support 67; a wiping holder 67 is fixed to the upper surface of the first turntable 64. When two wiping blocks 68 are used, two wiping holders 67 are used, and the two wiping holders 67 are also arranged symmetrically with respect to the fuel assembly 4.
In this embodiment, the wiping block 68 and its associated wiping support 67 are spare parts that can be temporarily removed from the fuel assembly and then installed when it is desired to wipe the fuel assembly.
It can be seen that the visual inspection mechanism 6 can be used for both visual inspection and wiping of the surface of the component.
Specifically, as shown in fig. 4, the pillar includes: the vertical frame 51, two slide rails 56, a lead screw assembly 55, two bearing assemblies 54, a mounting plate 57 and a lead screw driving mechanism.
The stand 51 is of an L-shaped structure and comprises two arms with end parts connected, namely a side arm and a bottom arm, and the bottom arm of the stand 51 is connected with the base 1 through a bolt; the two slide rails 56 are arranged on the side surfaces of the side arms of the stand 51 in parallel; the screw assembly 55 is arranged between the two slide rails 56; the two bearing assemblies 54 are respectively sleeved at two ends of the screw assembly 55 and connected with the side surfaces of the side arms of the vertical frame 51, namely, the screw assembly 55 is fixed on the vertical frame 51 through the two bearing assemblies 54; the mounting plate 57 is sleeved on the lead screw assembly 55 and is in threaded connection with the lead screw assembly 55, the mounting plate 57 is also in sliding connection with the two slide rails 56, and the support frame 63 of the appearance inspection mechanism 6 is arranged on the mounting plate 57; the screw driving mechanism is connected with an end of the screw assembly 55, and is configured to drive the screw assembly 55 to rotate, so as to drive the mounting plate 57 to slide back and forth along the two slide rails 56, and further drive the appearance inspection mechanism 6 to move back and forth along the side wall of the vertical frame 51.
In some embodiments, as shown in fig. 4, the lead screw driving mechanism includes: a first motor 53 and a first reducer 52.
The first motor 53 drives the screw assembly 55 to rotate through the first speed reducer 52.
In the nuclear fuel field, a fuel assembly pin sealing spring (for convenience of description, simply referred to as a spring in this embodiment) is one of the important seals of an assembly, and its flexibility determines the reliability of the assembly seal. However, no apparatus for flexibility checking of the fuel assembly pin seal spring has appeared in the related art at present; moreover, the flexibility inspection of the pin sealing spring of the fuel assembly needs to stretch and compress the spring according to the thread pitch, and the process is complex and cannot be used with the flexibility inspection equipment of the springs in other fields.
In order to solve this problem, as shown in fig. 1, the component inspection apparatus according to the present embodiment further includes: and a spring flexibility inspection mechanism 2 which is arranged below the component support base 3 and fixed on the base 1.
Wherein, be provided with the through-hole that makes fuel assembly 4 pass on the subassembly supporting seat 3, after the through-hole on the subassembly supporting seat 3 was passed downwards to the bottom of fuel assembly 4, its pin sealing spring stretched into in spring flexibility inspection mechanism 2.
The spring flexibility inspection mechanism 2 is used for compressing and loosening the fuel assembly pin sealing spring by a preset length and acquiring the recovery condition of the spring; and the fuel assembly pin sealing spring is stretched for a preset length and then loosened, and the recovery condition of the spring is obtained, so that the flexibility check of the spring is realized.
Specifically, as shown in fig. 2, the spring flexibility checking mechanism 2 includes: a base 22, a first rotating sleeve 24, a rotating bracket 27, a spring clamping mechanism, a rotating sleeve driving mechanism, and a plurality of second cameras 26. The number of the second cameras 26 can be set by those skilled in the art according to the cross-sectional size of the pin sealing spring of the fuel assembly, and two second cameras 26 are used in the embodiment, but the invention is not limited thereto, and a greater or lesser number of second cameras should be within the scope of the invention.
Wherein, the base 22 comprises a columnar boss, and the side of the columnar boss is provided with an external thread; the first rotating sleeve 24 is sleeved on the columnar boss, and the inner surface of the first rotating sleeve 24 is provided with an internal thread matched with the external thread of the side surface of the columnar boss, so that the first rotating sleeve 24 is in threaded connection with the seat body 22; the rotating bracket 27 is provided with a through hole penetrating the whole body and allowing the spring to pass through, the bottom of the rotating bracket 27 is connected with the top of the first rotating sleeve 24, specifically fixed on the top of the first rotating sleeve 24, and the through holes of the rotating bracket 27 and the first rotating sleeve 24 are coaxially arranged, so that the spring can pass through the rotating bracket 27 and extend into the first rotating sleeve 24; the spring clamping mechanism is arranged at the through hole at the top of the rotating bracket 27 and is used for clamping and loosening the spring; the rotating sleeve driving mechanism is connected with the first rotating sleeve 24 and is used for driving the first rotating sleeve 24 to rotate clockwise and anticlockwise along a preset track, so that when the spring is clamped, the columnar boss moves upwards relative to the first rotating sleeve 24 to compress the spring and moves downwards to stretch the spring, and when the first rotating sleeve 24 rotates, the spring is driven to freely stretch and retract in the spring groove; the second camera 26 is disposed in the rotating bracket 27 and close to the bottom through hole of the rotating bracket 27, and is used for taking the circumferential surface of the spring after the spring is compressed and stretched and loosened, so as to obtain the recovery condition of the spring, so that the subsequent spring recovery condition can be checked conveniently, and the operation is simple.
In order to more fully photograph the peripheral surface of the fuel assembly pin sealing spring, in the present embodiment, two second cameras 26 are symmetrically disposed about the spring.
Moreover, in order to make the second camera more stable when shooting, the spring flexibility inspection mechanism 2 further includes: a plurality of second camera supports 25, each second camera 26 being disposed (fixed) on one second camera support 25; the second camera bracket 25 is fixed on top of the rotating bracket 27. When two second cameras 26 are used, two second camera brackets 25 are also used, and the two second camera brackets 25 are also disposed symmetrically with respect to the spring.
Specifically, as shown in fig. 2, the spring clamp mechanism includes: two spring clamps 28 and two spring clamp drive mechanisms. In this embodiment, the spring clamp driving mechanism uses the second cylinder 29, but other driving mechanisms may be used, and the invention is not limited thereto.
Wherein, the two spring clamps 28 are oppositely arranged at the periphery of the top through hole of the rotating bracket 27; two second cylinders 29 are fixed on top of the rotary bracket 27 and are respectively connected to the two spring clamps 28 for driving the two spring clamps 28 to move toward and away from each other, thereby clamping and releasing the springs.
Specifically, as shown in fig. 2, the rotary sleeve driving mechanism includes: the gear 23, the pinion 210, the bracket 211, the second reducer 212 and the second motor 213.
The bracket 211 is arranged (fixed) on the seat 22, the second speed reducer 212 is arranged in the bracket 211, the second motor 213 is connected with the second speed reducer 212, the pinion 210 is connected with the second speed reducer 212, the bull gear 23 is sleeved and fixed on the first rotating sleeve 24, and the normal tooth pitches of the bull gear 23 and the pinion 210 are equal. The second motor 213 drives the pinion 210 to rotate through the second speed reducer 212, and then the pinion 210 is in meshing transmission with the bull gear 23 to drive the first rotating sleeve 24 to rotate, so as to drive the rotating bracket 27 to rotate, and control the spring to stretch and retract.
In this embodiment, the second motor 213 indirectly drives the spring to extend and retract, so that the amount of extension and retraction of the spring can be accurately controlled. In addition, in the process of the spring stretching, the second camera 26 is driven by the rotating bracket 27 to rotate, so that whether the free end of the spring slides or whether the stretching is in place can be checked; the second camera 26 can also be connected with an upper computer and transmits the spring image shot by the upper computer to the upper computer; the upper computer automatically identifies the recovery degree of the spring after receiving the spring image shot by each second camera 26.
Further, the pitch of the internal thread of the first rotary sleeve 24 and the pitch of the external thread of the cylindrical protrusion of the seat 22 are consistent with the pitch of the spring, thereby achieving the equal pitch compression and extension of the spring.
In some embodiments, as shown in fig. 2, the spring flexibility checking mechanism further comprises: the upper surface of the second rotary table 21 can freely rotate around the fuel assembly by 360 degrees, the upper surface of the second rotary table 4 is connected with the bottom of the base 22, and the bottom of the second rotary table 4 is arranged (fixed) on the base 1 and used for driving the whole spring flexibility checking mechanism to rotate until the second camera 26 in the rotary support 27 is opposite to the free end of the spring before the spring is compressed and stretched.
In this embodiment, since the initial position of the free end of the pin sealing spring of the fuel assembly is uncertain, the initial position can be found by matching the second rotary table 21 with the second camera 26. The free end of the spring is found, so that the recovery condition of the spring can be conveniently and accurately acquired subsequently.
Specifically, as shown in fig. 3, the component support base 3 includes: a second support bracket 34, a swivel assembly and a support ring 37.
Wherein, the end of the second supporting frame 34 is connected with the same side of the upright post 5, and the second supporting frame 34 is provided with a through hole; the rotating assembly passes through the through hole of the second support frame 34 and is fixed at the through hole, and the rotating assembly is provided with a through hole for the fuel assembly 4 to pass through and can rotate together with the fuel assembly 4; the support ring 37 is disposed on the rotating assembly.
In this embodiment, the support ring 37 is a direct support component of the fuel assembly 4. The support ring 37 may be made of a polymer material to prevent scratching of the fuel assembly 4.
Further, as shown in fig. 3, the rotating assembly includes: a self-aligning bearing 35, a thrust bearing 33, a second rotating sleeve 36 and a nut 32.
Wherein, the self-aligning bearing 35 is arranged on the through hole of the second supporting frame 34; the thrust bearing 33 is disposed below the through hole of the second support bracket 34; the second rotating sleeve 36 sequentially passes through the self-aligning bearing 35, the second supporting frame 34 and the thrust bearing 33 from top to bottom, and the supporting ring 37 is fixed at the top of the second rotating sleeve 36; the nut 32 is disposed below the thrust bearing 33 and is screw-coupled to the bottom of the second rotating sleeve 36, thereby fixing the second rotating sleeve 36 to the second support bracket 34.
In some embodiments, as shown in fig. 3, the assembly holder further comprises: upper dust caps 38 and lower dust caps 31.
Wherein, the upper dust cover 38 covers the support ring 37 and the part of the rotating assembly (i.e. the second rotating sleeve 36 and the self-aligning bearing 35) above the through hole of the second support frame 34, and is connected with the upper surface of the second support frame 34; the lower dust cover 31 covers the portion of the rotating member located below the through hole of the second support bracket 34 (i.e., the nut 32 and the thrust bearing 33), and is attached to the lower surface of the second support bracket 34.
In this embodiment, the upper dust cover 38 and the lower dust cover 31 are both fixed on the second support frame 34 for preventing dust of the support ring 37, the self-aligning bearing 35, the thrust bearing 33, the second rotating sleeve 36 and the nut 32, so that dust can be effectively prevented from entering the bearing.
The working principle of the present invention is described in detail below with reference to fig. 1 to 5:
fuel assembly appearance inspection workflow: under normal working conditions, the fuel assembly 4 is hoisted to a detection station of the device through the assembly claw 7, then the first motor 53 drives the screw rod assembly 55 to rotate to drive the appearance inspection mechanism 6 to move up and down, and meanwhile, the first rotary table 64 drives the first camera 66 to rotate to scan the appearance of the lower part of the fuel assembly 4; then the component claw 7 descends to place the fuel component 4 on the component support seat 3, the first motor 53 and the first rotary table 64 continue to drive the first camera 66 to scan other parts of the fuel component 4, images shot by the first camera are uploaded to a computer, and finally the computer automatically identifies surface defects such as scratches and oil stains on the appearance surface of the component.
Fuel assembly surface wiping workflow: under the normal operating mode, in the work of subassembly visual inspection if there is attachments such as greasy dirt to need to clean fuel assembly 4 like the discovery, hang fuel assembly 4 from this device through subassembly claw utensil 7 earlier, the manual work will be cleaned support 67 and clean piece 68 and install on first revolving stage 64, later hang fuel assembly 4 to this device testing station through subassembly claw utensil 7, it goes up and down and rotary motion to drive through first motor 53 and first revolving stage 64 and clean piece 68, clean fuel assembly 4 surface, observe through first camera 66 simultaneously, until cleaning qualified.
Fuel assembly pin seal spring flexibility inspection workflow: under normal working conditions, after the fuel assembly 4 is wiped to be qualified, the appearance inspection mechanism 6 is lifted to the upper part of the fuel assembly 4, the first air cylinder 62 acts to drive the assembly clamp 61 to clamp the fuel assembly 4, and then the assembly claw 7 releases the fuel assembly 4; the whole spring flexibility inspection mechanism 2 is driven to rotate by the second rotary table 21, and the position of the free end of the pin sealing spring is searched until the second camera 26 is over against the free end of the spring; at this time, the second cylinder 29 is actuated to drive the spring clamp 28 to clamp the spring; then the second motor 213 acts, and drives the first rotating sleeve 24 and the rotating bracket 211 to rotate through the meshing transmission of the pinion 210 and the bull gear 23; the base body 22 compresses the spring upwards for a certain distance along the equal pitch with the pin sealing spring, then the spring clamp 28 loosens the spring, and the second camera 26 checks whether the recovery degree of the pin sealing spring meets the requirement; then, stretching the pin sealing spring according to the same steps, then loosening the spring by the spring clamp 28, and checking whether the recovery degree of the pin sealing spring meets the requirement through the second camera 26; the fuel assembly pin sealing spring flexibility checking operation is completed.
In summary, the fuel assembly inspection device provided by the embodiment of the invention mainly comprises a base, a spring flexibility inspection mechanism, an assembly support seat, a stand column, an appearance inspection mechanism and the like; wherein, the base is used for the support of whole device fixed, and spring flexibility inspection mechanism is used for the inspection of fuel assembly pin sealing spring flexibility, and the supporting seat is used for the fuel assembly support, and the stand is used for the lift of visual inspection mechanism to supplementary fuel assembly supports, and visual inspection mechanism is used for fuel assembly visual inspection and greasy dirt to clean. The device has the characteristics of simple mechanism and multiple purposes, and can automatically realize the functions of appearance inspection of the fuel assembly, flexibility inspection of the pin sealing spring and wiping of oil stains on the peripheral surface of the assembly; moreover, the whole device adopts a modular design, so that the device has stronger applicability and is convenient to mount and dismount.
It will be understood that the above embodiments are merely exemplary embodiments taken to illustrate the principles of the present invention, which is not limited thereto. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit and substance of the invention, and these modifications and improvements are also considered to be within the scope of the invention.
Claims (10)
1. A fuel assembly inspection device, comprising:
a column;
the component supporting seat is connected with the side surface of the upright column and is used for supporting a fuel component; and the number of the first and second groups,
the appearance inspection mechanism is arranged above the assembly supporting seat, is connected with the side surface of the upright post in a mode of moving back and forth along the axial direction of the upright post, and is used for acquiring the peripheral surface condition of the fuel assembly in real time in the process of moving along a preset track;
further comprising: a spring flexibility inspection mechanism disposed below the assembly support base; the assembly support seat is provided with a through hole for the fuel assembly to pass through, and after the bottom of the fuel assembly passes through the through hole in the assembly support seat downwards, the pin sealing spring of the fuel assembly extends into the spring flexibility inspection mechanism;
the spring flexibility inspection mechanism is used for respectively compressing and stretching the pin sealing spring of the fuel assembly by a preset length and then loosening the pin sealing spring, and acquiring the recovery condition of the spring;
the spring flexibility inspection mechanism includes:
the base comprises a columnar boss, and the side surface of the columnar boss is provided with an external thread;
the first rotating sleeve is sleeved on the columnar boss, and the inner surface of the first rotating sleeve is provided with an internal thread matched with the external thread of the side surface of the columnar boss;
the rotating bracket is provided with a through hole which penetrates through the whole body and enables the spring to penetrate through, the bottom of the rotating bracket is connected with the top of the first rotating sleeve, and the through holes of the rotating bracket and the first rotating sleeve are coaxially arranged;
the spring clamping mechanism is arranged at the through hole at the top of the rotating bracket and used for clamping and loosening the spring;
the rotating sleeve driving mechanism is connected with the first rotating sleeve and used for driving the first rotating sleeve to rotate clockwise and anticlockwise along a preset track, so that the columnar lug boss moves upwards relative to the first rotating sleeve to compress the spring and moves downwards to stretch the spring when the spring is clamped; and the number of the first and second groups,
and the second cameras are arranged in the rotating support, are close to the bottom through hole of the rotating support and are used for shooting the circumferential surface of the spring after the spring is compressed and stretched and is loosened so as to obtain the recovery condition of the spring.
2. The component inspection apparatus according to claim 1, wherein the appearance inspection mechanism includes:
the end part of the first support frame is connected with the side surface of the upright post in a mode of moving back and forth along the axial direction of the upright post;
the first turntable is arranged on the first support frame, through holes allowing the fuel assemblies to penetrate through are formed in the first support frame and the first turntable, and the upper surface of the first turntable can rotate around the fuel assemblies; and the number of the first and second groups,
the first cameras are arranged on the upper surface of the first rotary table and used for shooting the circumferential surface of the fuel assembly in real time in the process of rotating under the driving of the first rotary table and in the process of moving axially along the upright under the driving of the first support frame.
3. The component inspection apparatus according to claim 2, wherein the appearance inspection mechanism further comprises:
a plurality of wiping blocks disposed on an upper surface of the first turntable proximate to a fuel assembly passing through the first turntable.
4. The component inspection apparatus according to claim 2, wherein the appearance inspection mechanism further comprises:
and the fuel assembly clamping mechanism is arranged at the bottom through hole of the first support frame and used for clamping and loosening the fuel assembly.
5. The component inspection apparatus of claim 1, wherein the column comprises:
erecting a frame;
the two sliding rails are arranged on the side surface of the vertical frame in parallel;
the screw rod assembly is arranged between the two slide rails;
the two bearing assemblies are respectively sleeved at the two ends of the lead screw assembly and are connected with the side surface of the vertical frame;
the mounting plate is sleeved on the lead screw assembly and is in threaded connection with the lead screw assembly, and the mounting plate is also in sliding connection with the two sliding rails; and the number of the first and second groups,
the screw rod driving mechanism is connected with the end part of the screw rod assembly and is used for driving the screw rod assembly to rotate so as to drive the mounting plate to slide back and forth along the two slide rails;
wherein the visual inspection mechanism is provided on the mounting plate.
6. The component inspection apparatus according to claim 1, wherein a pitch of an internal thread of the first rotary sleeve and a pitch of an external thread of the cylindrical boss of the holder body coincide with a pitch of a spring.
7. The component inspection device of claim 1, wherein the spring flexibility inspection mechanism further comprises:
and the upper surface of the second rotary table can rotate around the fuel assembly, and the upper surface of the second rotary table is connected with the bottom of the seat body and used for driving the whole spring flexibility inspection mechanism to rotate until a second camera in the rotary support is over against the free end of the spring before the spring is compressed and stretched.
8. The component inspection apparatus of claim 1, wherein the component support nest comprises:
the end part of the second support frame is connected with the side surface of the upright post, and a through hole is formed in the second support frame;
the rotating assembly penetrates through the through hole of the second support frame and is fixed at the through hole, and the rotating assembly is provided with a through hole for the fuel assembly to penetrate through and can rotate along with the fuel assembly; and the number of the first and second groups,
a support ring disposed on the rotating assembly.
9. The component inspection apparatus of claim 8, wherein the rotating component comprises:
the self-aligning bearing is arranged on the through hole of the second supporting frame;
a thrust bearing disposed below the through hole of the second support frame;
the second rotating sleeve sequentially penetrates through the self-aligning bearing, the second supporting frame and the thrust bearing from top to bottom; and the number of the first and second groups,
and the nut is arranged below the thrust bearing and is in threaded connection with the bottom of the second rotating sleeve.
10. The component inspection apparatus of claim 8, wherein the component support nest further comprises:
the upper dust cover covers the support ring and the part of the rotating assembly, which is positioned above the through hole, and is connected with the upper surface of the second support frame; and (c) a second step of,
and the lower dust cover covers the part of the rotating component below the through hole and is connected with the lower surface of the second support frame.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010002914.7A CN111175304B (en) | 2020-01-02 | 2020-01-02 | Fuel assembly inspection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010002914.7A CN111175304B (en) | 2020-01-02 | 2020-01-02 | Fuel assembly inspection device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111175304A CN111175304A (en) | 2020-05-19 |
| CN111175304B true CN111175304B (en) | 2022-11-29 |
Family
ID=70657795
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010002914.7A Active CN111175304B (en) | 2020-01-02 | 2020-01-02 | Fuel assembly inspection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111175304B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113091666B (en) * | 2021-03-16 | 2023-02-28 | 中国核电工程有限公司 | Clamping device and production system of nuclear fuel assembly |
| CN113358034B (en) * | 2021-05-25 | 2023-03-03 | 中国核电工程有限公司 | MOX subassembly appearance measuring device |
| CN113357992B (en) * | 2021-06-09 | 2023-03-03 | 中国核电工程有限公司 | MOX subassembly circle measuring device that beats |
-
2020
- 2020-01-02 CN CN202010002914.7A patent/CN111175304B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN111175304A (en) | 2020-05-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111175304B (en) | Fuel assembly inspection device | |
| CN104076042A (en) | Automatic detection device for appearance of cylindrical bar | |
| CN115289353B (en) | Fiber spinneret plate detection equipment with synchronous rotation driving mechanism | |
| CN114755185A (en) | Automatic optical testing device for computer mainboard | |
| US5838752A (en) | Apparatus and method for carrying out workings at reactor bottom | |
| CN210221454U (en) | Lens whole-circumference appearance inspection device | |
| CN219391854U (en) | PCB outward appearance automatic checkout device | |
| CN210923522U (en) | X-ray automatic detection device for welding seam of large-curvature workpiece | |
| CN115468496B (en) | Middle frame detection system | |
| CN110596158A (en) | X-ray automatic detection device for welding seam of large-curvature workpiece | |
| CN217425233U (en) | Stretching type O-shaped ring invisible crack image capture detection equipment | |
| CN216037234U (en) | Sensor processing device | |
| CN218051352U (en) | Clamping mechanism for machining high-definition camera for inspection robot | |
| CN211877802U (en) | White spirit body foreign matter check out test set | |
| KR100669112B1 (en) | The inspect apparatus of glass for display device having a sliding function | |
| KR0128822B1 (en) | Nuclear fuel inspection device | |
| CN113390883A (en) | Visual detection device of camera lens | |
| CN218239864U (en) | Appearance defect measuring device applied to cylindrical product | |
| CN215449037U (en) | Bearing ring defect detection device | |
| CN212808083U (en) | Endoscope detection sensor tool | |
| CN219065309U (en) | Detection equipment | |
| CN212872236U (en) | Device for automatically detecting surface defects of pipe fitting | |
| CN116052375B (en) | Alarm device for high-risk special operation | |
| TWI769060B (en) | Macroscopic and microscopic testing equipment and testing methods | |
| CN219417262U (en) | Novel magnetic ring appearance flaw detection structure |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |