CN115962726A - Measuring system of fuel assembly - Google Patents
Measuring system of fuel assembly Download PDFInfo
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- CN115962726A CN115962726A CN202211724819.3A CN202211724819A CN115962726A CN 115962726 A CN115962726 A CN 115962726A CN 202211724819 A CN202211724819 A CN 202211724819A CN 115962726 A CN115962726 A CN 115962726A
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- 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
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Abstract
The invention relates to a fuel assembly measuring system which comprises a pool wall hanging frame, a long rod member, a plurality of first measuring assemblies and at least one second measuring assembly, wherein the first measuring assemblies are arranged on the long rod member at intervals along the length direction of the long rod member, each first measuring assembly comprises a first image acquisition device and a laser generator, images acquired by the adjacent first image acquisition devices are spliced through the laser generator, and the second measuring assemblies comprise a moving platform and a second image acquisition device capable of horizontally sliding on the moving platform at a constant speed. The system is characterized in that the whole measuring unit is fixed on the pool wall through the pool wall hanging frame, the long rod members are used for intensively arranging required components according to actual measuring requirements, further panoramic shooting of a fuel component to be measured is achieved, various measuring data of the fuel component are obtained according to the image proportion relation calibrated before measurement, and measurement of the distance between fuel rods to be measured can be achieved through the second measuring component.
Description
Technical Field
The application relates to the technical field of nuclear power measuring equipment, in particular to a measuring system of a fuel assembly.
Background
Most nuclear power stations operate at present are pressurized water reactor nuclear power stations with mature technology and higher safety, based on the independent requirement of nuclear power technology, independent nuclear fuel assemblies of pressurized water reactor nuclear power stations are actively researched and developed by multiple domestic units, the nuclear fuel assemblies are used as core components in reactor cores of nuclear power stations and are key points for nuclear reaction safety monitoring, the nuclear fuel assemblies can generate bending or deformation phenomena under the comprehensive influence of thermal expansion, irradiation growth, irradiation creep, mechanical action between adjacent assemblies and the like, when errors exceed a certain safety range, all components in the nuclear fuel assemblies cannot be smoothly installed or replaced, and great risks are brought.
However, most of the measurement devices in the related art are contact measurement devices, the obtained data are limited, the reaction data cannot be completely changed, that is, the irradiated fuel assemblies cannot be subjected to multi-size photographing measurement, meanwhile, the whole set of measurement device is complex, and when the environmental temperature changes greatly, the measurement accuracy and efficiency cannot be guaranteed.
Disclosure of Invention
In view of the above, it is necessary to provide a fuel assembly measurement system capable of stably and efficiently measuring the position of an irradiated nuclear fuel assembly according to the problem that the measurement device in the related art cannot stably and efficiently perform multi-dimensional photographing measurement on the irradiated fuel assembly.
A fuel assembly measuring system comprises a measuring unit, wherein the measuring unit comprises a pool wall hanging rack, a long rod member connected with the pool wall hanging rack, a plurality of first measuring assemblies arranged on the long rod member and at least one second measuring assembly arranged on the long rod member, the first measuring assemblies are arranged at intervals along the length direction of the long rod member, each first measuring assembly comprises a first image acquisition device and a laser generator, and images acquired by the adjacent first image acquisition devices are spliced through the laser generator; the second measurement assembly comprises a moving platform and a second image acquisition device arranged on the moving platform, the moving platform is configured to drive the second image acquisition device to horizontally slide at a constant speed relative to the fuel assembly, and the second image acquisition device is used for acquiring images of the spacing between fuel rods.
In one embodiment, the second image acquisition device adopts a linear array camera, a grating ruler is arranged on the mobile platform, the linear array camera moves horizontally on the mobile platform to acquire a complete image of the fuel rod spacing, and the distance of the linear array camera moving on the grating ruler is in a dimensional proportional relation with the fuel rod spacing, so that the fuel rod spacing measurement is realized.
In one embodiment, the first measuring assembly further includes a first sealing housing assembly and an illuminating member, the first image capturing device, the laser generator and the illuminating member are all mounted on the first sealing housing assembly, one side of the first sealing housing assembly facing the long rod member is provided with a plurality of insertion holes along a length direction, and one end of the first image capturing device, the laser generator and the illuminating member is mounted on the first sealing housing assembly in a manner of being matched with the insertion holes.
In one embodiment, the second measuring assembly further includes a second sealing housing assembly, a moving platform is disposed in the second sealing housing assembly, the moving platform drives the second image collecting device to slide, a measuring window is disposed on a side away from the long rod member, and limiting sensing portions are disposed on two sides of the moving platform, so that the second image collecting device slides back and forth relative to the measuring window.
In one embodiment, the measuring unit further comprises an adapter assembly, the adapter assembly comprises a third sealing shell assembly and a plurality of outlet connectors, a plurality of connector through holes are formed in the side wall of the third sealing shell assembly, and the outlet connectors are matched with the connector through holes and penetrate through the third sealing shell assembly.
In one embodiment, the first sealing shell assembly further comprises a sealing cover and a foreign matter prevention cover, a first opening is formed in one side of the first sealing shell assembly, the sealing cover is arranged on the first opening in a matched mode with a plurality of bolts, and the foreign matter prevention cover is arranged on the outer side of the sealing cover in a matched mode with at most two bolts.
In one embodiment, the wall hanging rack comprises a horizontal hanging rack and a vertical hanging rack perpendicular to the horizontal hanging rack, the horizontal hanging rack comprises two parallel rack rods, connecting rails parallel to the nuclear reactor wall are mounted on the rack rods, positioning pins are oppositely arranged on the connecting rails and matched with the long rod members, so that the long rod members slide back and forth on the connecting rails along the rack rods, the vertical hanging rack extending downwards is arranged in the middle of the horizontal hanging rack, and the lower ends of the vertical hanging racks abut against the nuclear reactor wall for positioning and fixing.
In one embodiment, the fuel assembly measurement system further comprises a calibration unit configured to have the system shape and dimensions with the fuel assembly to be measured.
In one embodiment, the calibration unit comprises a long mark post, a first calibration piece and a second calibration piece, wherein the first calibration piece and the second calibration piece are connected oppositely along the vertical direction, the long mark post is arranged on the upper end face of the first calibration piece, and a plurality of calibration plates are arranged on the first calibration piece and the second calibration piece.
In one embodiment, the measuring system of the fuel assembly further comprises a fuel fixing base for fixing the fuel assembly to be measured, the fuel fixing base comprises a limiting bottom plate and a limiting column, the limiting column is arranged on the lower end face of the limiting bottom plate, the limiting column is matched with the grid for fixing the fuel assembly in shape, a limiting clamping plate is oppositely arranged on the upper end face of the limiting bottom plate, and the limiting clamping plate is matched and connected with the lower pipe seat of the fuel assembly.
The measuring unit comprises a pool wall hanging rack, a long rod member, a first measuring assembly and a second measuring assembly, the pool wall hanging rack is used for firmly fixing the whole measuring unit on the pool wall of the spent fuel pool, the long rod member is used for intensively arranging the first measuring assembly and the second measuring assembly along the length direction of the long rod member according to the actual measuring requirement of the fuel assembly, the first measuring assembly comprises a first image acquisition device and a laser generator, the laser generator is used for emitting continuous laser stripes to the fuel assembly to be measured, and each first image acquisition device can shoot images of the fuel assembly containing the adjacent laser stripes, so that the images collected by the adjacent first image acquisition devices are spliced, the fuel rod of the fuel assembly to be measured is shot, and the measuring meter calculates the length, the distance between the fuel rod and an upper tube seat, the height of an upper tube seat compression spring, the bending performance parameters of the nuclear fuel assembly and the like; the second measurement assembly comprises a moving platform and a second image acquisition device arranged on the moving platform, the second image acquisition device is driven by the moving platform to horizontally slide at a constant speed relative to the fuel assembly to be measured, uninterrupted continuous acquisition and processing can be carried out on the fuel assembly to be measured so as to obtain a complete image, and the distance of horizontal movement of the second image acquisition device can be used for establishing a relation with the distance between fuel rods to be measured, so that the distance measurement is realized.
Drawings
FIG. 1 is a schematic view of a measurement unit in a measurement system for a fuel assembly;
FIG. 2 is a schematic view of a calibration unit in the measurement system of the fuel assembly;
FIG. 3 is a schematic view of a tank wall mount of the fuel assembly measurement system;
FIG. 4 is a schematic view of a long rod member of the fuel assembly measurement system;
FIG. 5 is a schematic view of a first measurement assembly of the measurement system of the fuel assembly;
FIG. 6 is an internal cross-sectional view of a second measurement assembly of the measurement system of the fuel assembly;
FIG. 7 is a perspective view of a second measurement assembly of the measurement system of the fuel assembly;
FIG. 8 is a perspective view of another perspective of a second measurement assembly of the measurement system of the fuel assembly;
FIG. 9 is a schematic view of a transfer assembly in a fuel assembly measurement system;
FIG. 10 is a schematic view of a fuel fixture base of the measurement system of the fuel assembly;
FIG. 11 is a measurement layout of a measurement system for a fuel assembly.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of implementation in many other ways than those specifically set forth herein
Accordingly, the application 5 is not limited to the specific embodiments disclosed below, since similar modifications can be made by those skilled in the art without departing from the spirit of the application.
In the description of the present application, it is to be understood that the terms "central", "longitudinal", "transverse" and "longitudinal" are used herein,
Length, width, thickness, up, down, front, back, left,
"right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise"),
The terms "counterclockwise", "axial", "radial", "circumferential", and the like refer to the orientation or positional relationship based on the figure 0, which is for convenience of description and simplicity of description, and does not refer to the orientation or positional relationship
The device or element so referred to must be oriented, constructed and operated in a particular manner and should not be construed as limited to the particular configuration shown or suggested.
Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicative or implied
Indicating relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", 5 "second" may explicitly or implicitly include at least one of that feature. In the description of the present application,
"plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In this application, unless specifically stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and include, for example, both fixed and removable connections
Detachable connection or integration; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements or interaction between two elements
Relationships are used unless explicitly defined otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature "under," "beneath," and "under" a second feature may be directly under or obliquely under the second feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Referring to fig. 1, 5 and 6, an embodiment of the present invention provides a fuel assembly measuring system, including a measuring unit 1, wherein the measuring unit 1 includes a pool wall hanger 11, a long rod member 12 connected to the pool wall hanger 11, a plurality of first measuring assemblies 13 disposed on the long rod member 12, and at least one second measuring assembly 14 disposed on the long rod member 12, the plurality of first measuring assemblies 13 are arranged at intervals along a length direction of the long rod member 12, each first measuring assembly 13 includes a first image collecting device 131 and a laser generator 132, and images collected by adjacent first image collecting devices 131 are spliced by the laser generator 132. The second measurement assembly 14 includes a moving platform 141 and a second image capturing device 142 disposed on the moving platform 141, the moving platform 141 is configured to drive the second image capturing device 142 to horizontally slide at a constant speed relative to the fuel assembly 4, and the second image capturing device 142 is configured to capture an image of a fuel rod pitch.
The measurement unit 1 further includes a controller (not shown in the figure), all of the first image acquisition device 131 and the laser generator 132 are electrically connected to the controller, and the moving platform 141 and the second image acquisition device 142 are electrically connected to the controller, and are configured to receive image information and process and analyze data through the controller.
In the measuring system of the fuel assembly, the whole measuring unit 1 is firmly fixed on the pool wall of a spent fuel pool by arranging the pool wall hanging rack 11, the long rod member 12 is used for intensively arranging the first measuring assembly 13 and the second measuring assembly 14 along the length direction of the long rod member 12 according to the actual measuring requirement of the fuel assembly 4, the first measuring assembly 13 comprises a first image acquisition device 131 and a laser generator 132, the laser generator 132 is arranged for emitting continuous laser stripes to the fuel assembly 4 to be measured, because each first image acquisition device 131 can shoot the image of the fuel assembly 4 containing the adjacent laser stripes, based on the image, the images collected by the adjacent first image acquisition devices 131 are spliced, panoramic shooting of the fuel assembly 4 to be measured is further realized, multi-size measurement is carried out on the irradiated fuel assembly 4, the appearance of the nuclear fuel assembly 4 is checked, and the fuel assembly length, the fuel rod length, the distance between the fuel rods and the upper tube seat compression spring height, the nuclear fuel assembly bending and other performance parameters are measured and calculated.
The second measurement assembly 14 includes a moving platform 141 and a second image acquisition device 142 disposed on the moving platform 141, the moving platform 141 drives the second image acquisition device 142 to horizontally slide at a constant speed relative to the fuel assembly 4 to be measured, the fuel assembly 4 to be measured can be continuously acquired and processed to obtain a complete image, the horizontal movement distance of the second image acquisition device 142 can be related to the distance between the fuel rods to be measured, so as to realize distance measurement, and a controller is disposed to receive image information of different image acquisition devices and process and analyze data.
Referring to fig. 2 and 11, it is clear that before the fuel assembly 4 to be measured is measured, the calibration unit 1 needs to be calibrated by using the calibration unit 2 in the measurement system, wherein the calibration unit 2 is configured to have the shape and size of the system with the fuel assembly 4 to be measured.
In this embodiment, the calibration unit 2 includes a long calibration rod 21, a first calibration piece 22 and a second calibration piece 23, the first calibration piece 22 and the second calibration piece 23 are connected relatively along a vertical direction, the long calibration rod 21 is disposed on an upper end surface of the first calibration piece 22, a plurality of calibration plates (not shown in the drawing) with standard sizes are disposed on the first calibration piece 22 and the second calibration piece 23, an image of the calibration plate is collected by the measurement unit 1, and a dimensional proportional relationship between the collected image and the calibration plate is established, i.e., calibration is completed, according to the above calibration process, when the measurement unit 1 performs multi-dimensional measurement, after a target image of the fuel assembly 4 to be measured is collected, the size of the target fuel assembly 4 to be measured can be calculated according to a pre-calibrated proportional relationship.
Referring to fig. 3, in some embodiments, the wall hanging rack 11 includes a horizontal hanging rack 111 and a vertical hanging rack 112 perpendicular to the horizontal hanging rack 111, the horizontal hanging rack 111 includes two parallel rack rods 1111, a connecting rail 1112 parallel to the nuclear reactor wall is mounted on the rack rods 1111, a positioning pin 1113 is oppositely disposed on the connecting rail 1112, the positioning pin 1113 is matched with the long rod member 12, so that the long rod member 12 slides back and forth along the rack rods 1111 on the connecting rail 1112, the vertical hanging rack 112 extending downward is disposed in the middle of the horizontal hanging rack 111, and the lower end of the vertical hanging rack 112 abuts against the nuclear reactor wall for positioning and fixing.
In this embodiment, the whole pool wall hanging rack 11 is a frame welding structure, and further, one end of the rack 1111 close to the surface of the pool wall is provided with a locking part 1114 capable of tightly propping the pool wall, the locking part 1114 comprises a locking plate 1115 vertically arranged on the rack 1111 and a screw top 1116 oppositely arranged on the locking plate 1115, and the position of the screw top 1116 on the locking plate 1115 can be adjusted to firmly fix the pool wall hanging rack 11 on the pool wall of the spent fuel pool. Keep away from locking portion 1114 and all be provided with the slide rail with even rail 1112 adaptation along hack lever 1111 body of rod direction on hack lever 1111 to make even rail 1112 can slide around hack lever 1111, thereby adjust distance and position between whole long-pole member 12 and the pool wall, the slide rail end is provided with dog 1117, slides in hack lever 1111 fixed range with the restriction even rail 1112. Further, when the lower end of the vertical pylon 112 abuts the nuclear reactor wall, a reinforcing frame 113 is provided at the lower end of the vertical pylon 112 in order to improve the supporting and positioning effect of the vertical pylon 112.
Further, referring to fig. 1 and 4, the long pole member 12 connected to the wall hanging rack 11 comprises a first connecting rod 121, a second connecting rod 122, a first main frame 123 and a second main frame 124, wherein the upper end of the first connecting rod 121 is connected to the connecting rail 1112 of the wall hanging rack 11,
the first connecting rod 121 and the second connecting rod 122 are butted by a first connecting seat 125, the second connecting rod 122 is butted with the first main frame 123 by a second connecting seat 126, the first main frame 123 is butted with the second main frame 124 by a third connecting seat 127,
specifically, as the extension tool of the measurement system, the main structures of the first main frame 123 and the second main frame 124 are rectangular tube structures, and the same side of the first main frame 123 and the second main frame 124 has been all provided with a plurality of mounting holes along the length direction thereof from top to bottom, and the other opposite side provided with the mounting holes has been all provided with a plurality of collection holes 128, such as short oval holes and long oval holes, and the collection holes 128 are arranged reasonably according to the number of the first measurement component 13 and the second measurement component 14 selected for use in the actual measurement system. When the first measuring assembly 13 and the second measuring assembly 14 are respectively installed on the first main frame 123 and the second main frame 124 through bolt-fitting installation holes, the collecting hole 128 is used for allowing a component for collecting an image in the first measuring assembly 13 to pass through, so that the image collection is facilitated. In addition, the second main frame 124 is provided with a plurality of connecting column through holes 129 oppositely arranged for fixing the second measuring assembly 14.
Referring to fig. 5, in some embodiments, the first measuring assembly 13 further includes a first sealing housing assembly 134 and an illuminating member 133, the first image capturing device 131, the laser generator 132 and the illuminating member 133 are all mounted on the first sealing housing assembly 134, a plurality of insertion holes are formed in a side of the first sealing housing assembly 134 facing the long rod member 12 along a length direction, and one ends of the first image capturing device 131, the laser generator 132 and the illuminating member 133 are mounted on the first sealing housing assembly 134 in cooperation with the insertion holes.
Further, the first measuring assembly 13 is configured as a slender square cavity structure with an opening on one side, five insertion holes are formed from top to bottom on one side of the first main frame 123 or the second main frame 124, two of the insertion holes near the upper side of the first measuring assembly 13 are respectively provided with the laser generator 132 and the first image collecting device 131, and the other three insertion holes near the lower side are respectively provided with the illuminating element 133, the laser generator 132 and the first image collecting device 131.
Further, in some embodiments, the first seal housing assembly 134 further includes a seal cover 1342 and a foreign object prevention cover 1343, a first opening 1341 is disposed on one side of the first seal housing assembly 134, the first opening 1341 is disposed on the seal cover 1342 in cooperation with a plurality of bolts, and the foreign object prevention cover 1343 is disposed on the outer side of the seal cover 1342 in cooperation with at most two bolts. By replacing the exposure of the plurality of bolts with the exposure of at most two bolts, the function of preventing foreign matters is achieved, and the airtightness of the first seal housing assembly 134 is improved.
Referring to fig. 6, 7 and 8, in some embodiments, the second measurement assembly 14 further includes a second sealing housing assembly 143, a moving platform 141 is disposed in the second sealing housing assembly 143 along a length direction, the moving platform 141 drives the second image capturing device 142 to slide through gear transmission, a measurement window 1432 is disposed on a side away from the long rod member 12, and limit sensing portions 1412 are disposed on two sides of the moving platform 141, so that the second image capturing device 142 slides back and forth relative to the measurement window 1432.
Further, the second sealing housing assembly 143 is configured as a flat square cavity structure with an opening on one side, and the opening is configured with a sealing cover 1342 and a foreign-matter-proof cover 1343 which are configured the same as the first opening 1341, so as to improve the sealing performance of the second sealing assembly, which is not described herein again.
A connecting column 1431 matched with the long rod member 12 is oppositely arranged on one side of the second sealing shell component 143, a flange surface is arranged at one end, close to the shell wall, of the connecting column 1431, a stud is arranged at the other end of the connecting column 1431, the flange surface of the connecting column 1431 is connected with the second sealing shell component 143 through a threaded blind hole in the shell wall, and the stud is connected with the long rod member 12 in a matched mode. A measuring window 1432 is opened on one side departing from the long rod member 12, the measuring window 1432 is provided with a light-transmitting plate 1433, and a sealing cover 1434 is provided between the light-transmitting plate 1433 and the measuring window 1432, in this embodiment, the light-transmitting plate 1433 is made of lead glass, so that the second image capturing device 142 can better capture images under the condition of ionizing radiation, and the sealing cover 1434 for further improving the sealing performance is provided between the light-transmitting plate 1433 and the measuring window 1432. In addition, an outlet connector 152 is provided on the side of the second sealing case assembly 143 facing the long pole member 12, and a sealing ring is provided between the second sealing case assembly 143 and the outlet connector 152.
In some embodiments, the second image capturing device 142 employs a line camera, the moving platform 141 is provided with a grating ruler 1411, the line camera moves horizontally on the moving platform 141 to capture a complete image of the fuel rod pitch, and a dimensional proportional relationship is established between the distance moved by the line camera on the grating ruler 1411 and the fuel rod pitch, so as to achieve measurement of the fuel rod pitch.
Specifically, the linear array camera is driven by the gear transmission of the moving platform 141 to move horizontally and uniformly along the length direction of the moving platform 141, and meanwhile, the lens of the linear array camera directly faces the measurement window 1432 to measure the distance between the fuel assemblies 4 to be measured. Because the linear array camera adopted in the embodiment is linear in imaging every time, the length is extremely long, and only a few pixels are arranged in the width direction, the linear array camera is very suitable for being used in measurement occasions, has a larger visual field and higher precision, and can achieve accurate measurement of the distance of the whole fuel assembly 4 to be measured.
Referring to fig. 9, in some embodiments, the measurement unit 1 further includes an adaptor assembly 15, the adaptor assembly 15 includes a third sealing housing assembly 151 and a plurality of outlet connectors 152, a plurality of connector through holes are disposed on a side wall of the third sealing housing assembly 151, and the plurality of outlet connectors 152 are disposed through the third sealing housing assembly 151 in cooperation with the connector through holes. Meanwhile, the adaptor assembly 15 is also configured as a flat square cavity structure with an opening on one side, and the opening is configured with a sealing cover 153 and a foreign object prevention cover 154 which are configured the same as the first opening 1341, so as to improve the sealing performance of the adaptor assembly 15, which is not described herein again.
In this embodiment, the side wall of the third sealing housing assembly 151 is sequentially provided with four joint through holes from top to bottom, the joint through holes are all provided with joints, and the adapter assembly 15 is used for converging and arranging cables installed in the first measuring assembly 13 and the second measuring assembly 14 of the first main frame 123 and the second main frame 124.
Referring to fig. 10, in some embodiments, the measurement system of the fuel assembly 4 further includes a fuel fixing base 3 for fixing the fuel assembly 4 to be measured, the fuel fixing base 3 includes a limiting bottom plate 31 and a limiting pillar 32, the limiting pillar 32 is disposed on a lower end surface of the limiting bottom plate 31, the limiting pillar 32 is adapted to a shape of a grid for fixing the fuel assembly 4, a limiting clamping plate 33 is disposed on an upper end surface of the limiting bottom plate 31, and the limiting clamping plate 33 is connected to a lower tube seat of the fuel assembly 4. Specifically, set up fuel unable adjustment base 3 and be used for fixed fuel assembly 4 that awaits measuring, avoid fuel assembly 4 to take place to rock in the measurement process, further improve measurement accuracy.
Referring to fig. 1, in one embodiment, five mounting holes are formed in each of the first main frame 123 and the second main frame 124 from top to bottom, which total ten mounting holes, wherein the adapter assembly 15 is installed on the first mounting hole and the tenth mounting hole, the first measuring assembly 13 is installed in the remaining mounting holes, two kinds of collecting holes 128 are respectively formed in the other opposite side of the mounting holes, one group of the first measuring assemblies 13 corresponds to one short oval hole and one long oval hole, so that the laser generator 132 and the first image collecting device 131 of the first measuring assembly 13 close to the upper side face the fuel assembly 4 to be measured from the short oval shape, and the illuminating element 133, the laser generator 132 and the first image collecting device 131 close to the lower side face the fuel assembly 4 to be measured from the long oval hole for panoramic shooting.
Two sets of second measuring components 14 are oppositely arranged on the side, which is away from the second main frame 124, where the first measuring components 13 are arranged, specifically, two sets of second measuring components 14 are respectively arranged on the through holes 129 of the connecting column 1431 between the fifth set and the sixth set of first measuring components 13 on the second main frame 124, and between the sixth set and the seventh set of first measuring components 13, and are matched with the through holes 129 of the connecting column 1431, and the connecting column 1431 of the second measuring components 14 penetrates through the second main frame 124 and then is fixedly connected with the screw rod at the front end of the nut connecting column 1431.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A fuel assembly measuring system is characterized by comprising a measuring unit (1), wherein the measuring unit (1) comprises a pool wall hanging rack (11), a long rod member (12) connected with the pool wall hanging rack (11), a plurality of first measuring assemblies (13) arranged on the long rod member (12) and at least one second measuring assembly (14) arranged on the long rod member (12), the first measuring assemblies (13) are arranged at intervals along the length direction of the long rod member (12), each first measuring assembly (13) comprises a first image acquisition device (131) and a laser generator (132), and the laser generator (132) is used for splicing images acquired by adjacent first image acquisition devices (131); the second measuring assembly (14) comprises a moving platform (141) and a second image acquisition device (142) arranged on the moving platform (141), the moving platform (141) is configured to drive the second image acquisition device (142) to horizontally slide at a constant speed relative to the fuel assembly (4), and the second image acquisition device (142) is used for acquiring fuel rod spacing images.
2. The fuel assembly measuring system of claim 1, wherein the second image acquisition device (142) adopts a line camera, a grating ruler (1411) is arranged on the moving platform (141), the line camera is horizontally moved on the moving platform (141) to acquire a complete image of the fuel rod pitch, and the distance moved by the line camera on the grating ruler (1411) is in dimensional proportion to the fuel rod pitch, so that the fuel rod pitch measurement is realized.
3. The fuel assembly measuring system of claim 1, wherein the first measuring assembly (13) further comprises a first sealing shell assembly (134) and an illuminating member (133), the first image collecting device (131), the laser generator (132) and the illuminating member (133) are all mounted on the first sealing shell assembly (134), one side of the first sealing shell assembly (134) facing the long rod member (12) is provided with a plurality of inserting holes along the length direction, and one end of the first image collecting device (131), the laser generator (132) and the illuminating member (133) is erected on the first sealing shell assembly (134) in cooperation with the inserting holes.
4. The fuel assembly measuring system according to claim 2, wherein the second measuring assembly (14) further comprises a second sealed housing assembly (143), a moving platform (141) is arranged in the second sealed housing assembly (143), the moving platform (141) drives the second image capturing device (142) to slide, a measuring window (1432) is formed in one side of the second sealed housing assembly (143) facing away from the long rod member (12), and limit sensing parts (1412) are oppositely arranged on two sides of the moving platform (141) so that the second image capturing device (142) can slide back and forth relative to the measuring window (1432).
5. The fuel assembly measuring system of claim 1, wherein the measuring unit (1) further comprises an adapter assembly (15), the adapter assembly (15) comprises a third sealing shell assembly (151) and a plurality of outlet connectors (152), a plurality of connector through holes are formed in the side wall of the third sealing shell assembly (151), and the outlet connectors (152) are arranged through the third sealing shell assembly (151) in a manner of being matched with the connector through holes.
6. The fuel assembly measuring system of claim 3, wherein the first sealing case assembly (134) further comprises a sealing cover (1342) and a foreign object prevention cover (1343), a first opening (1341) is formed in one side of the first sealing case assembly (134), the sealing cover (1342) is formed by fitting a plurality of bolts into the first opening (1341), and the foreign object prevention cover (1343) is formed by fitting at most two bolts into the outer side of the sealing cover (1342).
7. The fuel assembly measuring system according to claim 1, wherein the wall hanger (11) comprises a horizontal hanger (111) and a vertical hanger (112) perpendicular to the horizontal hanger (111), the horizontal hanger (111) comprises two parallel hanger rods (1111), the hanger rods (1111) are mounted with connecting rails (1112) parallel to the nuclear reactor wall, the connecting rails (1112) are relatively provided with positioning pins (1113), the positioning pins (1113) are matched with the long rod members (12) to make the long rod members (12) slide back and forth along the hanger rods (1111) on the connecting rails (1112), the horizontal hanger (111) is provided with a downward extending vertical hanger (112) in the middle, and the lower ends of the vertical hanger (112) are abutted against the nuclear reactor wall for positioning and fixing.
8. The fuel assembly measuring system according to claim 1, characterized in that it further comprises a calibration unit (2), said calibration unit (2) being configured to have the system shape and dimensions with the fuel assembly (4) to be measured.
9. The fuel assembly measuring system according to claim 8, wherein the calibration unit (2) comprises a long calibration rod (21), a first calibration member (22) and a second calibration member (23), the first calibration member (22) and the second calibration member (23) are connected in a vertical direction, the long calibration rod (21) is arranged on the upper end face of the first calibration member (22), and a plurality of calibration plates are arranged on the first calibration member (22) and the second calibration member (23).
10. The fuel assembly measuring system according to claim 1, characterized in that the fuel assembly measuring system (4) further comprises a fuel fixing base (3) for fixing the fuel assembly (4) to be measured, the fuel fixing base (3) comprises a limiting bottom plate (31) and a limiting column (32), the limiting column (32) is arranged on the lower end face of the limiting bottom plate (31), the limiting column (32) is matched with the grid for fixing the fuel assembly (4) in shape, a limiting clamping plate (33) is oppositely arranged on the upper end face of the limiting bottom plate (31), and the limiting clamping plate (33) is matched and connected with the lower pipe seat of the fuel assembly (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211724819.3A CN115962726A (en) | 2022-12-30 | 2022-12-30 | Measuring system of fuel assembly |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211724819.3A CN115962726A (en) | 2022-12-30 | 2022-12-30 | Measuring system of fuel assembly |
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| Publication Number | Publication Date |
|---|---|
| CN115962726A true CN115962726A (en) | 2023-04-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211724819.3A Pending CN115962726A (en) | 2022-12-30 | 2022-12-30 | Measuring system of fuel assembly |
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| Country | Link |
|---|---|
| CN (1) | CN115962726A (en) |
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2022
- 2022-12-30 CN CN202211724819.3A patent/CN115962726A/en active Pending
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