CN108708891B - Lattice frame connecting device for expansion of spent fuel pool and connecting method thereof - Google Patents
Lattice frame connecting device for expansion of spent fuel pool and connecting method thereof Download PDFInfo
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- CN108708891B CN108708891B CN201810494034.9A CN201810494034A CN108708891B CN 108708891 B CN108708891 B CN 108708891B CN 201810494034 A CN201810494034 A CN 201810494034A CN 108708891 B CN108708891 B CN 108708891B
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- 239000002915 spent fuel radioactive waste Substances 0.000 title claims abstract description 75
- 238000000034 method Methods 0.000 title claims abstract description 38
- 230000007704 transition Effects 0.000 claims description 16
- 238000009434 installation Methods 0.000 claims description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 239000011324 bead Substances 0.000 claims description 7
- 239000003758 nuclear fuel Substances 0.000 claims description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 229910001026 inconel Inorganic materials 0.000 claims description 2
- 239000000498 cooling water Substances 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910000990 Ni alloy Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- VNNRSPGTAMTISX-UHFFFAOYSA-N chromium nickel Chemical compound [Cr].[Ni] VNNRSPGTAMTISX-UHFFFAOYSA-N 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 230000002285 radioactive effect Effects 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B1/00—Devices for securing together, or preventing relative movement between, constructional elements or machine parts
- F16B1/02—Means for securing elements of mechanisms after operation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/06—Magazines for holding fuel elements or control elements
- G21C19/07—Storage racks; Storage pools
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B2200/00—Constructional details of connections not covered for in other groups of this subclass
- F16B2200/99—Fasteners with means for avoiding incorrect assembly or positioning
-
- 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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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of nuclear auxiliary cooling water of a million-kilowatt nuclear power station, and discloses a novel grid connection device for spent fuel pool expansion and a connection method thereof. The connecting device comprises a pair of grid bottom plates, a pair of grids and a connecting assembly for connecting the two adjacent grid bottom plates, wherein the connecting assembly comprises a connecting plate, a first positioning plate and a second positioning plate which are respectively arranged at two ends of the connecting plate, a temporary screw for installing the first positioning plate on one grid bottom plate and a final screw for installing the second positioning plate on the other grid bottom plate. The first positioning plate is installed on the grid bottom plate through the temporary screws, the second positioning plate is installed on the adjacent grid bottom plate through the final screws, and the first positioning plate and the second positioning plate are connected through the connecting plates respectively, so that the connection between the two adjacent grids is realized, the stability of the grids is ensured, and the grids are prevented from overturning during an earthquake.
Description
Technical Field
The invention belongs to the technical field of nuclear auxiliary cooling water of a million-kilowatt nuclear power station, and particularly relates to a novel grid connection device for spent fuel pool expansion and a connection method thereof.
Background
Spent fuel is a nuclear fuel that has been irradiated with radiation and used, and is produced by a nuclear reactor in a nuclear power plant. Nuclear fuel after nuclear reactor reactions contains a large amount of radioactive elements and therefore has a large amount of radioactivity, which, if not properly disposed of, can seriously affect the environment and the health of the personnel in contact with them. Therefore, spent fuel reacted by a nuclear reactor of a nuclear power plant needs to be stored in a spent fuel pool for several decades until its activity is reduced to a level where a subsequent post-treatment process for the spent fuel can be performed. With the increasing of domestic nuclear power plants and the continuous operation of the nuclear power plants, the spent fuel pool grillwork of most domestic nuclear power plants at present is full, and the existing container can not meet the requirement of spent fuel storage in the nuclear power plants, so the spent fuel pool storage capacity must be enlarged through transformation, and the normal production in the nuclear power plants is ensured.
Because the dead pool bottom of pool area is bigger, can have certain error in the work progress, can produce the place of part unevenness promptly, like this, when placing the bottom of pool with the framework, if the position that the framework was located is in the time of unevenness just in time, then if take place the earthquake then the risk that probably produces the vibrations skew this moment, in addition, if in case take place great earthquake framework and produce the back of shifting, the dead hangs and can't carry out accurate location to the framework to produce great influence to loading of follow-up spentnuclear fuel.
Disclosure of Invention
The invention aims to provide a lattice connecting device for spent fuel pool expansion and a connecting method thereof, and aims to solve the technical problem that a new lattice in the prior art is stored at the bottom of a spent fuel pool and overturns due to an earthquake.
In order to achieve the purpose, the invention adopts the technical scheme that: spent fuel pond expands and holds with new framework connecting device includes:
a pair of grid floors;
the grillage is respectively and correspondingly arranged on the bottom plates of the grillages, each grillage consists of a plurality of grillage units, and each grillage unit is used for storing nuclear fuel;
the connecting assembly is used for connecting two adjacent grid bottom plates;
the connecting assembly comprises a connecting plate, a first positioning plate and a second positioning plate which are respectively arranged at two ends of the connecting plate, a temporary screw for detachably connecting the first positioning plate with one of the grid bottom plates, and a final screw for fixedly connecting the second positioning plate with the other of the grid bottom plates, wherein the final screw can replace the temporary screw to fixedly connect the first positioning plate with one of the grid bottom plates.
Furthermore, one of the pair of grid bottom plates is provided with a first through hole for the temporary screw to pass through, the first positioning plate is provided with a first fixing hole at the first through hole for fixing the temporary screw, the other grid bottom plate of the pair of grid bottom plates is provided with a second through hole for the final screw to pass through, and the second positioning plate is provided with a second fixing hole at the second through hole for fixing the final screw.
Furthermore, a positioning table for positioning the temporary screw in the first through hole is arranged on the temporary screw.
Furthermore, the first positioning plate, the connecting plate and the second positioning plate are combined to form an I-shaped structure.
Furthermore, a pair of first transition fillets is formed in the connecting position of the first positioning plate and the connecting plate, a pair of second transition fillets is formed in the connecting position of the second positioning plate and the connecting plate, and the pair of first transition fillets and the pair of second transition fillets are distributed at four corners of the connecting plate respectively.
Further, the connecting assembly also comprises a connecting plate ejector rod which is abutted against the bottom of the spent fuel pool and used for supporting the connecting plate.
Furthermore, the ejector rod is provided with threads, and the connecting plate is provided with a threaded hole connected with the ejector rod in a matching manner.
Furthermore, the grillwork bottom plate and the connecting plate component are all made of chromium-nickel alloy.
The connecting method of the new framework for the expansion of the spent fuel pool uses the connecting device of the new framework for the expansion of the spent fuel pool, and comprises the following steps:
s1, positioning connection: positioning and connecting the first positioning plate and the grid bottom plate in water by adopting the temporary screw;
s2, fixed connection: after the first positioning plate in the step S1 is positioned and connected with the grid bottom plate in the front, the grid bottom plate is placed into a spent fuel pool, and the final screw is adopted to fixedly connect the second positioning plate with the grid bottom plate in the rear in the water;
s3, final connection: and replacing the temporary screws with the final screws to realize the final fixed connection of the first positioning plate and the grid bottom plate in water.
Further, the mounting device is also included, and the mounting device can be used for mounting the temporary screw on the first positioning plate and mounting the final screw on the second positioning plate.
Further, the mounting device includes:
installing a pipe;
the lifting lug is arranged at one end of the installation pipe and is used for lifting the installation pipe;
the mounting head is mounted at the other end of the mounting pipe and is used for mounting the temporary screws on the first positioning plate and mounting the final screws on the second positioning plate; and
and the handle is arranged on the mounting pipe and used for rotating the mounting pipe so as to drive the mounting head to mount the temporary screw on the first positioning plate and mount the final screw on the second positioning plate.
Furthermore, the mounting head comprises a sleeve chuck covering the temporary screw, a first through hole for the sleeve chuck to pass through is formed in the grid bottom plate, a first groove is formed in the temporary screw, and a first convex rib inserted into the first groove is formed in the bottom of the sleeve chuck.
Furthermore, a second groove for the first protruding rib to be inserted into is formed in the final screw, and a second through hole for the ferrule to pass through is formed in the grid bottom plate at the second groove.
Furthermore, an opening used for containing the mounting pipe is formed in the lifting lug, a through hole is formed in the mounting pipe, second through holes are formed in the two side walls of the opening of the lifting lug, and a shaft pin penetrating through the through hole penetrates through the second through holes.
Further, the handle and the mounting head are welded on the mounting tube.
Furthermore, the mounting device also comprises a plurality of positioning plates which are used for abutting against the inner side surface of the framework and positioning the mounting pipes in the framework, and each positioning plate is mounted on the mounting pipe.
Furthermore, each locating plate is triangle-shaped, rectangle, oval-shaped setting.
Further, the temporary screw fixing device further comprises a dismounting device which can be used for dismounting the temporary screw installed on the first positioning plate.
Further, the detaching device includes:
disassembling the pipe;
the lifting ring is arranged at one end of the dismounting pipe and is used for lifting the dismounting pipe;
the disassembly head is arranged at the other end of the disassembly pipe and is used for disassembling the temporary screw arranged on the first positioning plate; and
the handle is arranged on the dismounting pipe and used for rotating the dismounting pipe so as to drive the dismounting head to dismount the temporary screw arranged on the first positioning plate.
Furthermore, the disassembly head comprises a shaft sleeve used for being clamped with the outer end of the temporary screw and a ball screw arranged in the shaft sleeve and used for clamping the temporary screw, a boss matched with the temporary screw is arranged at the bottom of the shaft sleeve and rotates, the ball screw is distributed in the radial direction of the shaft sleeve and provided with a containing groove used for containing the ball screw.
Furthermore, a channel used for containing the dismounting pipe is formed in the hanging ring, a third through hole is formed in the dismounting pipe, a third through hole is formed in the two side walls of the channel through the hanging ring, and a rotating shaft penetrating through the third through hole is inserted in the third through hole.
Further, the handle, the dismounting head and the dismounting pipe are integrally formed.
Furthermore, the dismounting device also comprises a plurality of positioning blocks which are used for abutting against the inner side surface of the framework and positioning the dismounting pipes in the framework, and each positioning block is arranged on the dismounting pipe.
Further, each positioning block is welded on the detachable pipe.
The novel grid connection device for spent fuel pool expansion and the connection method thereof have the beneficial effects that: compared with the prior art, the novel lattice frame connecting device for expansion of the spent fuel pool is characterized in that the first positioning plate is arranged on the lattice frame bottom plate through the temporary screw, the second positioning plate is arranged on the adjacent lattice frame bottom plate through the final screw, and the first connecting plate and the second connecting plate are respectively connected through the connecting plates, so that the connection between the two adjacent lattice frames is realized, the stability of the lattice frames is ensured, the lattice frames are prevented from overturning in the earthquake, in addition, the device is simple in structure, convenient to install and low in cost, and the safety of spent fuel storage is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the embodiments or the drawings needed to be practical in the prior art description, and obviously, the drawings in the following description are only some embodiments of the embodiments, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic connection diagram between a lattice frame and a connection assembly according to an embodiment of the present invention;
FIG. 2 is a schematic view of the connection between two adjacent grid floors according to the embodiment of the present invention;
FIG. 3 is a front view of two adjacent grids connected according to an embodiment of the present invention;
FIG. 4 is a schematic view of a connection assembly in an embodiment of the present invention;
FIG. 5 is a schematic view of a mounting device in an embodiment of the invention;
FIG. 6 is an enlarged view of A in FIG. 6;
FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;
FIG. 8 is a schematic view of a detachment apparatus in an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a detaching head in an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-a framework;
2-a grid bottom plate; 21-a first grid floor; 22-a second grid floor;
3-connecting the components; 31-a connecting plate; 32-a first positioning plate; 33-a second positioning plate; 34-a temporary screw; 35-final screw; 36-a first transition fillet; 37-a second transition fillet; 38-a top rod; 310-a threaded hole; 320-a first fixation hole; 330-second fixing hole; 340-a positioning table;
4-mounting means; 41-lifting lugs; 42-a mounting head; 43-a handle; 44-a positioning plate; 45-installing a tube; 46-axle pin; 410-an opening; 420-cutting ferrule; 421-a rib;
5-disassembling the device; 51-disassembling the tube; 52-hoisting rings; 53-removal of the head; 54-a handle; 55-positioning blocks; 56-rotating shaft; 520-channel; 530-shaft sleeve; 531-wave bead screw; 532-boss.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
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.
It should be noted that the terms of orientation such as left, right, up and down in the embodiments of the present invention are only relative concepts or reference to the normal use state of the product, and should not be considered as limiting, and the implementation of the present invention will be described in detail with reference to the specific embodiments below.
As shown in fig. 1 to 9, the present embodiment provides a new grid connecting device for expanding a spent fuel pool, which includes a pair of grid bottom plates 2 and a pair of grids 1, the pair of grids 1 are respectively and correspondingly disposed on the pair of grid bottom plates 2, two adjacent grid bottom plates 2 are connected by a connecting assembly 3, the connecting assembly 3 includes a connecting plate 31, a first positioning plate 32 and a second positioning plate 33 are respectively disposed at two ends of the connecting plate 31, in addition, the connecting assembly 3 further includes a temporary screw 34 and a final screw 35, the temporary screw 34 can be used to detachably mount the first positioning plate 32 on one of the pair of grid bottom plates 2, the final screw 35 can be used to mount the second positioning plate 33 on the other grid bottom plate 2 of the pair of bottom plates 2, and the final screw 35 can replace the temporary screw 34 to fixedly connect the first positioning plate 32 with one of the pair of grid bottom plates 2, like this, install first locating plate 32 on grillage bottom plate 2 through interim screw 34, install second locating plate 33 on adjacent grillage bottom plate 2 through final screw 35, and be connected above-mentioned first locating plate 32 and above-mentioned second locating plate 33 respectively through connecting plate 31, with this connection between two adjacent grillages 1 of realization, like this, guaranteed the stability of grillage 1, in order to prevent toppling of grillage 1 when the earthquake, in addition, the device simple structure, simple to operate, with low costs, the security that the spent fuel was stored has been improved.
In the present invention, for convenience of description, one of the pair of shelf floors 2 is named a first shelf floor 21, and the other of the pair of shelf floors 2 is named a second shelf floor 22.
Further, referring to fig. 4, as a specific embodiment of the novel grid connecting device for expanding the spent fuel pool according to the present invention, a first through hole (not shown in the drawings) is formed on the first grid bottom plate 21, a first fixing hole 320 is formed on the first positioning plate 32, the temporary screw 34 can pass through the first through hole to be matched with the first fixing hole 320, so as to realize the connection between the first grid bottom plate 21 and the first positioning plate 32, similarly, a second through hole (not shown in the drawings) is also formed on the second grid bottom plate 22, and a second fixing hole 330 is formed on the second positioning plate 33, so that the final screw 35 can pass through the second through hole to be matched with the second fixing hole 330, so as to realize the connection between the adjacent grid bottom plate 2 and the second positioning plate 33. Preferably, in the present invention, the first positioning plate 32 is provided with two first fixing holes 320, and the second positioning plate 33 is provided with two second fixing holes 330, but a plurality of first fixing holes 320 and a plurality of second fixing holes 330 may be provided in the present invention, which is not limited herein.
Preferably, the first fixing hole 320 and the second fixing hole 330 are both screw holes, and other fixing holes may be provided, which is not limited herein.
Preferably, referring to fig. 3, a boss 340 is provided on the temporary screw 34, and the boss 340 can be used to position the temporary screw 34 in the first through hole, so that the first positioning plate 32 and the first grid bottom plate 21 can be firstly positioned and connected by using the temporary screw 34, and then the second positioning plate 33 and the second grid bottom plate 22 can be fixedly connected by using the final screw 35, thereby realizing the connection between the adjacent grids 1.
Further, referring to fig. 4, as a specific embodiment of the novel grid connecting device for expanding a spent fuel pool provided by the present invention, the first positioning plate 32, the connecting plate 31, and the second positioning plate 33 are combined to be disposed in an i shape, so as to keep the stress at the two ends of the connecting plate uniform, but in this embodiment, the first positioning plate 32, the connecting plate 31, and the second positioning plate 33 may also be disposed in a U shape, which is not limited herein.
Preferably, the first positioning plate 32, the connecting plate 31 and the second positioning plate 33 may be integrally formed or screwed, which is not limited herein.
Further, referring to fig. 4, as a specific embodiment of the novel grid connecting device for expanding a spent fuel pool provided by the present invention, a pair of first transition fillets 36 is disposed at a connecting position of the first positioning plate 32 and the connecting plate 31, a pair of second transition fillets 37 is disposed at a connecting position of the second positioning plate 33 and the connecting plate 31, and the pair of first transition fillets 36 and the pair of second transition fillets 37 are respectively distributed at four corners of the connecting plate 31. Like this, through seting up two pairs of transition fillets to reduce the stress concentration of connecting plate 31 with first locating plate 32 and second locating plate 33 junction, improved coupling assembling 3's life. In the present embodiment, the above-mentioned transition fillet radius is 1 cm, but the fillet radius may be set to other sizes, which is not limited herein.
Further, referring to fig. 3, as an embodiment of the novel lattice connecting device for expanding a spent fuel pool according to the present invention, the connecting assembly 3 further includes a top rod 38, and the top rod 38 can be used for supporting the connecting plate 31, so that when the connecting plate 31 is placed in the spent fuel pool, the connecting plate 31 can be prevented from contacting with the bottom of the spent fuel pool. Specifically, the top rod 38 is threaded, and the connecting plate 31 is provided with a threaded hole 310 for connecting the top rod 38, so that the top rod 38 can pass through the threaded hole 310 and abut against the ground, thereby preventing the connecting plate 31 from contacting the spent fuel pool.
Preferably, the threaded hole 310 is opened at a central position of the connecting plate 31, so that the positioning is more convenient, and of course, the threaded hole 310 may be opened at other positions of the connecting plate 31, which is not limited herein.
Preferably, the grid 1, the grid bottom plate 2 and the connecting plate assembly 3 are made of inconel, but may be made of other materials, and is limited herein.
The invention provides a connection method of a new framework for spent fuel pool expansion, which uses the connection device of the new framework for spent fuel pool expansion and comprises the following steps:
s1, positioning connection: the first positioning plate 32 is connected with the previous grid bottom plate in a positioning way by adopting a temporary screw 34 on water;
s2, fixed connection: after the first positioning plate 32 in the step S1 is positioned and connected with the previous lattice bottom plate, the lattice bottom plate is put into a spent fuel pool, and the second positioning plate 33 is fixedly connected with the next lattice bottom plate in the water by using the final screw;
s3, final connection: the temporary screws 34 are replaced by final screws 35, which effect the final fixed connection of the first positioning plate 32 to the preceding shelf floor in the water.
In the invention, in the connection of the two grid bottom plates, the bottom plate of the grid which needs to be placed in the spent fuel pool firstly becomes the bottom plate of the back grid, and the bottom plate of the grid which is placed in the spent fuel pool later is called as the bottom plate of the front grid.
In the invention, firstly, the temporary screw 34 is adopted to screw the first positioning plate 32 with the prior grid bottom plate 2, since the positioning table 340 is arranged on the temporary screw 34, the positioning connection between the temporary screw 34 and the grid bottom plate can be realized through the positioning table 340, so that the pre-positioning between the first positioning plate 32 and the prior grid bottom plate is realized, then, the second positioning plate 33 is fixedly connected with the subsequent grid bottom plate through the final screw 35, and after the second positioning plate 33 is fixedly connected with the subsequent grid bottom plate, the temporary screw 34 is replaced by the final screw 35, so as to realize the final connection between the first positioning plate 32 and the prior grid bottom plate.
Further, referring to fig. 5, as an embodiment of the new grid connecting device for expanding a spent fuel pool provided by the present invention, the connecting method of the new grid for expanding a spent fuel pool further includes a mounting device 4, the mounting device 4 can be used for mounting the temporary screw 34 on the first positioning plate 32 and mounting the final screw 35 on the second positioning plate 33, and of course, in the present invention, the mounting device 4 can also mount a top rod 38 on the connecting plate 31.
Further, referring to fig. 5, as an embodiment of the novel grid connection device for expanding spent fuel pool of the present invention, the installation device 4 includes an installation pipe 45, a lifting lug 41 is installed at one end of the installation pipe 45, an installation head 42 is installed at the other end of the installation pipe 45, the lifting lugs 41 may be used for lifting the mounting pipes 45 and inserting them into the grid 1, and the mounting heads 42 may be used for mounting the temporary screws 34 to the first positioning plate 32 and the final screws 35 to the second positioning plate 33, and in the present invention, the mounting device 4 further comprises a handle 43, the handle 43 being mounted on the mounting tube 45, the handle 43 is used to rotate the mounting tube 45 to drive the mounting head 42 to mount the temporary screw 34 on the first positioning plate 32 and to mount the final screw 34 on the second positioning plate 33. In this way, by providing the mounting means 4, it is ensured that the grid 1 is connected underwater, making underwater connection possible.
Further, referring to fig. 7, as a specific embodiment of the new grid connecting device for expanding the capacity of the spent fuel pool provided by the present invention, the mounting head 42 includes a sleeve 420 covering the temporary screw, a first through hole (not shown in the drawings) is formed in the grid bottom plate, the sleeve 420 can pass through the first through hole, a first groove (not shown in the drawings) is formed in the temporary screw 34, and a first rib 421 for inserting into the first groove is formed at the bottom of the sleeve 420, so that by providing the first rib 421 and the first groove, when the first rib 421 is inserted into the first groove, the first rib 421 is rotated, so that the temporary screw 34 can be driven to rotate, thereby ensuring the smooth installation process and improving the installation efficiency.
Preferably, a second groove (not shown in the drawings) for inserting the first rib 421 is formed on the final screw 35, and a second through hole (not shown in the drawings) is formed in the grid bottom plate, the second through hole corresponding to the second groove and allowing the ferrule 420 to pass through is formed in the grid bottom plate, so that by forming the second groove, when the first rib 421 is inserted into the second groove, the final screw 35 can be driven to rotate by rotating the first rib 421, thereby ensuring that the mounting process of the final screw 35 is smoothly performed, and improving the mounting efficiency.
Preferably, referring to fig. 6, in the present invention, an opening 410 for receiving the mounting pipe 45 is formed in the lifting lug 41, a through hole (not shown) is formed in the mounting pipe 45, second through holes (not shown) are formed in two side walls of the opening 410 of the lifting lug 41, and a shaft pin 46 passing through the through hole is inserted into the second through hole, so that the shaft pin 46 passes through the second through hole and the through hole to connect the lifting lug 41 and the mounting pipe 45.
The handle 43 and the mounting head 42 are preferably welded to the mounting tube 45, but the handle 43 and the mounting head 42 may be integrally formed with the mounting tube 45.
Further, referring to fig. 5, as a specific embodiment of the new grid connecting device for expanding the spent fuel pool provided by the present invention, the mounting device 4 further includes a plurality of positioning plates 44, two ends of each positioning plate 44 are respectively abutted against the inner side surface of the grid 1, and each positioning plate 44 is mounted on the mounting pipe 45, so that, in the process of mounting the temporary screws 34 and the final screws 35, since the positioning plates 44 are abutted against the inner side surface of the grid 1, the mounting pipe 45 is ensured not to shake, and the mounting accuracy is improved. Each positioning plate 44 is preferably provided in a triangular shape, a rectangular shape, an oval shape, etc., but may be provided in other shapes, which is not limited herein.
Further, referring to fig. 8, as an embodiment of the connection device of the new grid for expanding the spent fuel pool according to the present invention, the connection method of the new grid for expanding the spent fuel pool further includes a dismounting device 5, and the dismounting device 5 can be used for dismounting the temporary screws 34 installed on the first positioning plate 32.
Specifically, referring to fig. 8, the detaching device 5 includes a detaching tube 51, a hanging ring 52 is installed at one end of the detaching tube 51, a detaching head 53 is installed at the other end of the detaching tube 51, the hanging ring 52 can be used for hanging the detaching tube 51 and inserting the detaching tube 51 into the grid 1, the detaching head 53 can be used for detaching the temporary screw installed on the first positioning plate 32, in addition, in the present invention, the installing device 5 further includes a handle 54, the handle 54 is installed on the detaching tube 51, the handle 54 can be used for rotating the detaching tube 51 to drive the detaching head 53 to detach the temporary screw 34 installed on the first positioning plate 32. In this way, by providing the dismounting device 5, it is ensured that the grid 1 can be dismounted underwater, making the underwater dismounting possible.
Further, referring to fig. 9, as a specific embodiment of the new grid connecting device for expanding the spent fuel pool according to the present invention, the disassembling head 53 includes a sleeve 530 engaging with an outer end of the temporary screw 34, a bead screw 531 for clamping the temporary screw 34 is disposed in the sleeve 530, the bead screw 531 is disposed along a radial direction of the sleeve 530, and a receiving groove (not shown) for receiving the bead screw 531 is disposed on the sleeve 530, in addition, a boss 532 for rotating the temporary screw 34 is disposed at a bottom of the sleeve 530, and the smooth disassembling is ensured by disposing the boss 532. In the invention, the wave ball screw 531 comprises a ball and a spring, so that when the temporary screw is grabbed, the wave ball screw 531 is extruded by the body of the temporary screw 34, the spring contracts, the ball is firstly expanded to clamp the ball on the body of the temporary screw 34, the temporary screw 34 is clamped, and the temporary screw 34 can be taken out from the spent fuel pool. In the present invention, the wave ball screws 531 are provided in four, so that the weight of the gripped object is sufficiently resisted by the four wave ball screws 531 to ensure that the gripped object does not fall off. Of course, in the present embodiment, the wave ball screw 531 may be provided in other plural numbers, and is not limited herein.
Preferably, in the present invention, a channel 520 for accommodating the detachable pipe 51 is formed in the hanging ring 52, a third through hole (not shown) is formed in the detachable pipe 51, a third through hole (not shown) is formed in both side walls of the channel 520 of the hanging ring 52, and a rotating shaft 56 passing through the third through hole is inserted in the third through hole, so that the rotating shaft 56 passes through the third through hole and the third through hole to connect the hanging ring 52 and the detachable pipe 51.
The handle 54 and the detaching head 53 are preferably integrally formed with the detaching tube 51, but the handle 54 and the detaching head 53 may be welded to the detaching tube 51.
Further, referring to fig. 8, as a specific embodiment of the new grid connecting device for expanding the spent fuel pool according to the present invention, the disassembling device 5 further includes a plurality of positioning blocks 55, two ends of the positioning blocks 55 are respectively abutted to the inner side surface of the grid 1, and the positioning blocks 55 are all mounted on the disassembling pipe 51, so that when the temporary screw 34 is disassembled, the disassembling pipe 51 is ensured not to shake back and forth, and the disassembling accuracy is improved. Each positioning block 55 may be configured to have a triangular shape, a rectangular shape, an oval shape, or the like, but may also be configured to have other shapes, which is not limited herein.
It is preferable that each of the positioning blocks 55 is welded to the detachable pipe 51, but the positioning block may be attached to the detachable pipe 51 by a pin joint, which is not limited herein.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (23)
1. A connection method of a lattice frame for expansion of a spent fuel pool uses a lattice frame connection device for expansion of the spent fuel pool, and the lattice frame connection device for expansion of the spent fuel pool comprises the following steps:
a pair of grid floors;
the grillage is respectively and correspondingly arranged on the bottom plates of the grillages, each grillage consists of a plurality of grillage units, and each grillage unit is used for storing nuclear fuel;
the connecting assembly is used for connecting two adjacent grid bottom plates;
the connecting assembly comprises a connecting plate, a first positioning plate and a second positioning plate which are respectively arranged at two ends of the connecting plate, a temporary screw for detachably connecting the first positioning plate with one of the grid bottom plates of the pair of grid bottom plates, and a final screw for fixedly connecting the second positioning plate with the other of the grid bottom plates of the pair of grid bottom plates, wherein the final screw can replace the temporary screw to fixedly connect the first positioning plate with one of the grid bottom plates of the pair of grid bottom plates;
the method is characterized in that the method for connecting the grillwork for spent fuel pool expansion comprises the following steps:
s1, positioning connection: positioning and connecting the first positioning plate and the grid bottom plate in water by adopting the temporary screw;
s2, fixed connection: after the first positioning plate in the step S1 is positioned and connected with the grid bottom plate in the front, the grid bottom plate is placed into a spent fuel pool, and the final screw is adopted to fixedly connect the second positioning plate with the grid bottom plate in the rear in the water;
s3, final connection: and replacing the temporary screws with the final screws to realize the final fixed connection of the first positioning plate and the grid bottom plate in water.
2. The method for connecting a lattice for expanding a spent fuel pool according to claim 1, wherein a first through hole for passing the temporary screw is formed in one of the lattice bottom plates, a first fixing hole for fixing the temporary screw is formed in the first through hole, a second through hole for passing the final screw is formed in the other lattice bottom plate, and a second fixing hole for fixing the final screw is formed in the second through hole.
3. The method for connecting a lattice for expanding a spent fuel pool according to claim 2, wherein the temporary screw is provided with a positioning table for positioning the temporary screw in the first through hole.
4. The method for connecting a lattice frame for expanding a spent fuel pool according to claim 1, wherein the first positioning plate, the connecting plate and the second positioning plate are combined to form an I-shaped structure.
5. The method for connecting a lattice frame for expanding a spent fuel pool according to claim 1, wherein a pair of first transition round corners are formed at a connecting position of the first positioning plate and the connecting plate, a pair of second transition round corners are formed at a connecting position of the second positioning plate and the connecting plate, and the pair of first transition round corners and the pair of second transition round corners are respectively distributed at four corners of the connecting plate.
6. The method for connecting a lattice for expanding a spent fuel pool according to claim 4, wherein the connecting assembly further comprises a top bar abutting against the bottom of the spent fuel pool and supporting the connecting plate.
7. The method for connecting a lattice frame for expanding a spent fuel pool according to claim 6, wherein the top rod is provided with a thread, and the connecting plate is provided with a threaded hole for connecting the top rod.
8. The method for connecting a lattice for expanding a spent fuel pool according to claim 1, wherein the lattice, the lattice bottom plate and the connecting members are all made of inconel.
9. The method for connecting a spent fuel pool lattice for expansion according to any one of claims 1 to 8, further comprising a mounting means for mounting the temporary screw to the first positioning plate and the final screw to the second positioning plate.
10. The method for connecting a lattice for expanding a spent fuel pool according to claim 9, wherein the installation means comprises:
installing a pipe;
the lifting lug is arranged at one end of the installation pipe and is used for lifting the installation pipe;
the mounting head is mounted at the other end of the mounting pipe and is used for mounting the temporary screws on the first positioning plate and mounting the final screws on the second positioning plate; and
and the handle is arranged on the mounting pipe and used for rotating the mounting pipe so as to drive the mounting head to mount the temporary screw on the first positioning plate and mount the final screw on the second positioning plate.
11. The method for connecting a lattice for expanding a spent fuel pool according to claim 10, wherein the mounting head comprises a ferrule covering the temporary screw, the lattice bottom plate is provided with a first through hole for the ferrule to pass through, the temporary screw is provided with a first groove, and the bottom of the ferrule is provided with a first rib for inserting into the first groove.
12. The method for connecting a lattice for expanding a spent fuel pool according to claim 11, wherein the final screw is provided with a second groove for inserting the first rib, and a second through hole for passing the ferrule is provided on the lattice bottom plate at the second groove.
13. The method for connecting a lattice frame for expanding a spent fuel pool according to claim 10, wherein the lifting lug is provided with an opening for receiving the mounting pipe, the mounting pipe is provided with a through hole, the lifting lug is provided with second through holes on two side walls of the opening, and a shaft pin penetrating through the through hole is inserted in the second through hole.
14. The method for connecting a lattice for expanding a spent fuel pool according to claim 10, wherein the handle and the mounting head are welded to the mounting pipe.
15. The method of connecting a spent fuel pool lattice for expansion of a spent fuel pool of claim 10, wherein the mounting means further comprises a plurality of alignment plates for abutting against an inside surface of the lattice and positioning the mounting tubes in the lattice, each of the alignment plates being mounted to the mounting tube.
16. The method for connecting a lattice for expanding a spent fuel pool according to claim 15, wherein each of the positioning plates is disposed in a triangular, rectangular or oval shape.
17. The method for connecting a spent fuel pool lattice for expansion according to any one of claims 1 to 8, further comprising a detaching device for detaching the temporary screw mounted on the first positioning plate.
18. The method for connecting a lattice for expanding a spent fuel pool according to claim 17, wherein the disassembling means comprises:
disassembling the pipe;
the lifting ring is arranged at one end of the dismounting pipe and is used for lifting the dismounting pipe;
the disassembly head is arranged at the other end of the disassembly pipe and is used for disassembling the temporary screw arranged on the first positioning plate; and
the handle is arranged on the dismounting pipe and used for rotating the dismounting pipe so as to drive the dismounting head to dismount the temporary screw arranged on the first positioning plate.
19. The method for connecting a lattice frame for expanding a spent fuel pool according to claim 18, wherein the disassembling head comprises a shaft sleeve for clamping an outer end of the temporary screw, and a bead screw arranged in the shaft sleeve for clamping the temporary screw, wherein a boss for rotating the temporary screw in a matching manner is arranged at the bottom of the shaft sleeve, the bead screws are distributed along the shaft sleeve in a radial direction, and a containing groove for containing the bead screw is formed in the shaft sleeve.
20. The method for connecting a lattice frame for expanding a spent fuel pool according to claim 18, wherein the hanging ring is provided with a channel for accommodating the detachable pipe, the detachable pipe is provided with a third through hole, the hanging ring is provided with third through holes on two side walls of the channel, and a rotating shaft passing through the third through hole is inserted in the third through hole.
21. The method for connecting a lattice for expanding a spent fuel pool according to claim 18, wherein the handle, the dismantling head and the dismantling pipe are integrally formed.
22. The method of connecting a lattice for expanding a spent fuel pool according to claim 18, wherein the disassembling means further comprises a plurality of positioning blocks for abutting against an inner side surface of the lattice and positioning the disassembling pipe in the lattice, each of the positioning blocks being mounted to the disassembling pipe.
23. The method for connecting a lattice for expanding a spent fuel pool according to claim 22, wherein each of the positioning blocks is welded to the disassembled tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810494034.9A CN108708891B (en) | 2018-05-22 | 2018-05-22 | Lattice frame connecting device for expansion of spent fuel pool and connecting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810494034.9A CN108708891B (en) | 2018-05-22 | 2018-05-22 | Lattice frame connecting device for expansion of spent fuel pool and connecting method thereof |
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| CN108708891A CN108708891A (en) | 2018-10-26 |
| CN108708891B true CN108708891B (en) | 2020-05-22 |
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| CN109848683B (en) * | 2018-12-06 | 2021-08-31 | 中广核工程有限公司 | Spent fuel grillwork extracting tool of nuclear power station |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3221810C2 (en) * | 1982-06-09 | 1986-04-30 | Kraftwerk Union AG, 4330 Mülheim | Rack for storing irradiated nuclear reactor fuel elements |
| DE3531093A1 (en) * | 1985-08-30 | 1987-03-05 | Kraftwerk Union Ag | STORAGE RACK FOR LONELY FUEL ELEMENTS OF CORE REACTORS |
| FR2696511B1 (en) * | 1992-10-02 | 1994-11-04 | Electricite De France | Telescopic boom. |
| US6345927B1 (en) * | 2000-03-08 | 2002-02-12 | General Electric Company | Weld reinforcement |
| JP2002372016A (en) * | 2001-06-18 | 2002-12-26 | Mitsubishi Heavy Ind Ltd | Bolt connection structure |
| CN101451397A (en) * | 2007-12-05 | 2009-06-10 | 中冶天工建设有限公司 | Steel structure modularization construction process |
| CN101615435B (en) * | 2008-06-26 | 2015-04-08 | Cci公开股份有限公司 | Storage rack assembly for storing nuclear fuel elements |
| CN101783189B (en) * | 2009-01-21 | 2012-06-27 | 中国核电工程有限公司 | Spent fuel storage rack in pressurized water reactor nuclear power station |
| CN102610287A (en) * | 2012-03-28 | 2012-07-25 | 中广核工程有限公司 | Spent fuel storage grillwork for nuclear power plant |
| CN105448364A (en) * | 2015-12-29 | 2016-03-30 | 上海核工程研究设计院 | Fuel storage grid assembly |
| JP6615689B2 (en) * | 2016-05-18 | 2019-12-04 | 日立Ｇｅニュークリア・エナジー株式会社 | Metal cask fixing structure of spent fuel intermediate storage facility |
| CN107524675B (en) * | 2017-09-22 | 2023-02-03 | 北京必革家科技有限公司 | Connection structure, chassis assembly, splicing type chassis and furniture |
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