CN111824938A - Spent fuel storage framework transporting and overturning device and mounting method - Google Patents
Spent fuel storage framework transporting and overturning device and mounting method Download PDFInfo
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- CN111824938A CN111824938A CN202010697112.2A CN202010697112A CN111824938A CN 111824938 A CN111824938 A CN 111824938A CN 202010697112 A CN202010697112 A CN 202010697112A CN 111824938 A CN111824938 A CN 111824938A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C1/00—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles
- B66C1/10—Load-engaging elements or devices attached to lifting or lowering gear of cranes or adapted for connection therewith for transmitting lifting forces to articles or groups of articles by mechanical means
- B66C1/22—Rigid members, e.g. L-shaped members, with parts engaging the under surface of the loads; Crane hooks
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66C—CRANES; LOAD-ENGAGING ELEMENTS OR DEVICES FOR CRANES, CAPSTANS, WINCHES, OR TACKLES
- B66C13/00—Other constructional features or details
- B66C13/04—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack
- B66C13/08—Auxiliary devices for controlling movements of suspended loads, or preventing cable slack for depositing loads in desired attitudes or positions
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- 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
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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 discloses a spent fuel storage grillwork transportation and turnover device and an installation method, wherein the spent fuel storage grillwork transportation and turnover device comprises an upper frame structure and a lower frame structure; the upper frame structure comprises a structure frame, an upper connecting plate, an upper frame hoisting point and an upper pressure plate; the lower frame structure comprises a bottom plate, a lower connecting plate and a lower pressing plate; the upper frame structure is detachably connected with the lower frame structure, the upper pressing plate is positioned at one end of the bottom plate, and the lower pressing plate is positioned at the other end of the bottom plate; the upper pressing plate, the bottom plate and the lower pressing plate form a groove-shaped structure, the upper pressing plate and the lower pressing plate are the side edges of the groove-shaped structure, and the upper pressing plate and the lower pressing plate are adjustable in position in the groove width direction of the groove-shaped structure. The installation method is based on the device. By adopting the technical scheme provided by the scheme, the design and the application of the disposable spent fuel storage grillwork are facilitated by ensuring the stability of the shape and the size of the spent fuel storage grillwork after transportation and installation.
Description
Technical Field
The invention relates to the technical field of spent fuel treatment equipment, in particular to a spent fuel storage grid transportation and turnover device and an installation method.
Background
Along with the operation of each unit of the domestic second-generation nuclear power station, the spent fuel pool of most units is close to full capacity, and meanwhile, a spent fuel post-treatment plant at the present stage cannot receive spent fuel generated by each nuclear power station, so that the intensive transformation of a storage rack on the basis of the original spent fuel pool becomes a necessary trend in order to improve the storage capacity of the spent fuel pool of the nuclear power station. When the spent fuel pool is subjected to intensive transformation, firstly, part of cadmium grillwork needing to be replaced is lifted out of the spent fuel pool, and the high-density grillwork is installed in the spent fuel pool according to a certain sequence and position.
Besides the intensive transformation of the storage rack, the storage rack is correspondingly structurally improved and the installation mode of the storage rack is further optimized, so that the spent fuel post-treatment is facilitated.
Disclosure of Invention
Aiming at the technical problems that besides the intensive transformation of the storage rack, the storage rack is correspondingly structurally improved and the installation mode of the storage rack is further optimized, which are beneficial to the post-treatment of the spent fuel, the invention provides a spent fuel storage grid transportation and turnover device and an installation method. By adopting the technical scheme provided by the scheme, the design and the application of the disposable spent fuel storage grillwork are facilitated by ensuring the stability of the shape and the size of the spent fuel storage grillwork after transportation and installation.
Aiming at the problems, the spent fuel storage grillwork transporting and overturning device and the mounting method provided by the invention solve the problems through the following technical points: a spent fuel storage grillwork transporting and overturning device comprises an upper frame structure and a lower frame structure;
the upper frame structure comprises a structure frame, an upper connecting plate arranged on the lower side of the structure frame, an upper frame hoisting point arranged on the upper side of the structure frame, and an upper pressing plate arranged on the side surface of the structure frame;
the lower frame structure comprises a bottom plate, a lower connecting plate arranged at one end of the bottom plate and a lower pressing plate arranged at the other end of the bottom plate;
go up frame construction and can dismantle the connection: the upper frame structure is connected to one end of the lower frame structure through the lower connecting plate and the upper connecting plate, the upper pressing plate is positioned at one end of the bottom plate, and the lower pressing plate is positioned at the other end of the bottom plate;
the upper pressing plate, the bottom plate and the lower pressing plate form a groove-shaped structure, the upper pressing plate and the lower pressing plate are the side edges of the groove-shaped structure, and the upper pressing plate and the lower pressing plate are adjustable in position in the groove width direction of the groove-shaped structure.
For the structural design of storage racks, the storage racks are generally arranged: including if the bottom plate that thickness is 30mm sets up the grid body on the bottom plate, form a plurality of vertical square spaces on the last grid body, for in the storage grid of aluminium base boron carbide neutron absorber material, the lateral wall thickness of last grid body can set up to be only 2mm, need not to set up the intensity reinforcement simultaneously at the side of grid body. Meanwhile, the overall dimensions (length, width, height) of the storage lattice can be designed as follows: 2210X 1720X 4425 mm. The structural design of the storage grillwork is to obtain the following technical effects: when the storage framework is decommissioned and subjected to harmless decomposition treatment, the simpler structural form aims to obtain smaller harmless treatment workload and reduce the harmless treatment difficulty.
However, in the storage lattice frame in the above form, the lattice frame itself is relatively heavy (about 7 tons), so that the transfer difficulty of the lattice frame itself is relatively large, and meanwhile, the storage lattice frame itself is compact in structure, has no hanging point, is relatively high in height, and is only suitable for horizontal transportation during specific transportation. However, after the storage grillage is turned over, the rigidity of the storage grillage is insufficient due to the light weight design of the grillage body. Therefore, in order to avoid the change of the shape and the size of the storage grillwork after transportation and installation to influence the normal use of the storage grillwork, the scheme provides the device.
When the device is used specifically: transportation of the storage grid and installation in spent fuel pools can be accomplished as follows:
s1, hoisting the storage grillwork to the lower framework structure in a horizontal posture, supporting the bottom of the storage grillwork on the bottom plate to complete the connection between the upper framework structure and the lower framework structure, utilizing the upper pressing plate and the lower pressing plate to carry out end constraint on the storage grillwork, and enabling the bottom side of the storage grillwork to be abutted against the lower pressing plate;
s2, transferring the device to a spent fuel pool;
s3, completing the lifting and overturning of the device by utilizing the upper frame lifting points, so that the storage grillwork is overturned to a vertical state;
s4, changing the position of at least one of the upper pressing plate and the lower pressing plate in the groove width direction, and realizing the removal of the storage grid constraint and the acquisition of the storage grid operation gap;
s5, separating the device from the storage grillwork by using a grabbing tool;
and S6, finishing the vertical installation of the storage lattice in the spent fuel pool.
In summary, when the storage lattice frame is transferred by the device, firstly, the structural design of the device itself includes the upper pressing plate, the bottom plate and the lower pressing plate, and meanwhile, the positions of the upper pressing plate and the lower pressing plate are adjustable in the groove width direction of the groove-shaped structure, when the storage lattice frame is lifted to the lower frame structure in the horizontal posture in step S1, the lower pressing plate is not required to be abutted against the bottom side of the storage lattice frame when the storage lattice frame is released to the bottom plate, so that the device itself can be protected and the lifting and releasing can be conveniently completed: the lower pressing plate is used for restraining the bottom side of the storage framework by subsequently changing the position of the lower pressing plate; similarly, when the upper frame structure is installed, if in a hoisting mode, the upper pressing plate does not need to be in contact with the end part of the storage lattice frame when the upper frame structure is released, and meanwhile, the position of the upper frame structure matched with the lower frame structure is not influenced by the storage lattice frame: the end part of the storage grillwork is restrained by subsequently adjusting the position of the upper pressing plate, so that the device and the storage grillwork can be protected and the device can be conveniently assembled by adopting the scheme.
Meanwhile, after the device is matched with the storage grillwork, the bottom support is provided for the storage grillwork, the end part constraint is provided for the storage grillwork, the stress of the storage grillwork can be effectively avoided or reduced in the transportation process of the storage grillwork, the stability of the shape and the size of the storage grillwork is facilitated, and the subsequent use of the storage grillwork is facilitated.
Meanwhile, the device provides a structural foundation for realizing horizontal transportation and reversible installation of the storage grillwork after being transported to a mounting point, and is convenient for realizing the design and application of the spent fuel storage grillwork which promotes light weight and is easy to treat after decommissioning.
Meanwhile, the integral structure design of the device is convenient for completing the installation of the storage grillwork on the device.
The further technical scheme is as follows:
in order to avoid the storage grid from sliding on the device and leading to potential safety hazards for transportation and transfer if the stainless steel on the outer layer of the storage grid is abraded and the loosening matching relationship is adopted, the storage grid is arranged as follows: and the top surface of the bottom plate is also provided with an anti-skid pad.
Among the technical scheme who provides as above, because last frame hoisting point is after storage framework transports in place for storage framework, to storage framework on the device hoisting point when overturning, in order to realize for the lower frame structure is idle or put immediately when transporting in order to reduce its horizontal plane area size that occupies, set up to: and one end of the bottom plate, which is used for fixing the upper frame structure, is also provided with a turnover hoisting point. The turnover hoisting point is used for separating the lower frame structure from the upper frame structure and then vertically placing the lower frame structure to achieve the purpose of reducing the area of the horizontal plane occupied by the lower frame structure. As a person skilled in the art, in the present embodiment, all technical terms related to the suspension points, such as the frame suspension point and the turning suspension point, are actually only suspension points, and the use of different technical terms is only intended to distinguish different suspension points. As a person skilled in the art, the above-mentioned upper frame hanging point and the above-mentioned overturning hanging point may be any one of the upper frame hanging point and the overturning hanging point for the storage grid overturning hanging, so that the upper frame hanging point as described above may be used as a hanging point for transferring the upper frame structure when the overturning hanging point is used as the storage grid overturning hanging position.
As a simple structure can form the surrounding edge around the bottom plate to avoid the storage grillwork of horizontal posture under the abnormal condition to slide out from this device's technical scheme, set up to: the structure frame comprises a first vertical frame and a second vertical frame, one end of the first vertical frame is connected with one end of the second vertical frame, the first vertical frame and the second vertical frame form an L-shaped structure in a surrounding mode, and the upper pressing plate is installed on the first vertical frame;
a third vertical frame is further arranged at one end, provided with the lower pressing plate, of the bottom plate, the lower pressing plate is installed on the third vertical frame, and a pull rod is further arranged between the third vertical frame and the bottom plate;
after the upper frame structure and the lower frame structure are connected, the first vertical frame and the third vertical frame are used as the surrounding edges on one pair of opposite sides of the bottom plate, and the second vertical frame and the pull rod are used as the surrounding edges on the other pair of opposite sides of the bottom plate.
As an implementation scheme with low material cost and high structural strength: the upper frame structure and the lower frame structure are formed by welding channel steel.
For being favorable to going up frame construction and lower frame construction's cooperation efficiency, set up as: and a positioning mechanism is also arranged between the upper frame structure and the lower frame structure and is used for assisting in determining the relative position between the upper frame structure and the lower frame structure. When the positioning mechanism is used specifically, the positioning mechanism can be realized by adopting a positioning plate, a positioning pin and the like. The upper frame structure and the lower frame structure are preferably connected by bolts.
As a simple structure's top board and lower clamp plate position adjustment mode, set up to: the adjustable positions of the upper pressing plate and the lower pressing plate are both realized through thread transmission.
As a specific implementation mode of the thread transmission, the thread transmission is provided with the following steps: the thread transmission is realized in the following mode: including many drive screw that correspond with top board and holding down plate respectively, still include for structure frame or bottom plate rigidity, a plurality of internal thread holes that correspond with drive screw, drive screw and the internal thread hole threaded connection who corresponds with it, top board or holding down plate and the drive screw rotatable coupling that corresponds separately, and top board or holding down plate are fixed in the position on corresponding drive screw axis. In the scheme, for the upper pressure plate, such as the first vertical frame of the fixed wing of the upper pressure plate, the corresponding internal thread hole is arranged on the first vertical frame; aiming at the lower pressing plate, the inner thread hole is formed in the third vertical frame.
As a concrete implementation mode with light weight and high structural strength, the structure is as follows: the upper frame structure and the lower frame structure are truss structures.
The scheme also discloses a spent fuel storage grid mounting method, which is used for realizing the mounting of the spent fuel storage grid in a spent fuel pool, and the method is based on the device in any one of the above steps, and comprises the following steps which are carried out in sequence:
s1, hoisting the storage grillwork to the lower framework structure in a horizontal posture, supporting the bottom of the storage grillwork on the bottom plate to complete the connection between the upper framework structure and the lower framework structure, utilizing the upper pressing plate and the lower pressing plate to carry out end constraint on the storage grillwork, and enabling the bottom side of the storage grillwork to be abutted against the lower pressing plate;
s2, transferring the device to a spent fuel pool;
s3, completing the lifting and overturning of the device by utilizing the upper frame lifting points, so that the storage grillwork is overturned to a vertical state;
s4, changing the position of at least one of the upper pressing plate and the lower pressing plate in the groove width direction, and realizing the removal of the storage grid constraint and the acquisition of the storage grid operation gap;
s5, separating the device from the storage grillwork by using a grabbing tool;
and S6, finishing the vertical installation of the storage lattice in the spent fuel pool.
The invention has the following beneficial effects:
in summary, when the device and the method provided by the present disclosure are used to realize the storage grid transfer, firstly, the structural design of the device itself includes the upper pressing plate, the bottom plate and the lower pressing plate, and at the same time, the positions of the upper pressing plate and the lower pressing plate are adjustable in the slot width direction of the slot-shaped structure, when the storage grid is specifically installed, if the storage grid is lifted to the lower frame structure in the horizontal posture in step S1, the lower pressing plate does not need to abut against the bottom side of the storage grid when the storage grid is released to the bottom plate, so that the device itself can be protected and the lifting and releasing can be conveniently completed: the lower pressing plate is used for restraining the bottom side of the storage framework by subsequently changing the position of the lower pressing plate; similarly, when the upper frame structure is installed, if in a hoisting mode, the upper pressing plate does not need to be in contact with the end part of the storage lattice frame when the upper frame structure is released, and meanwhile, the position of the upper frame structure matched with the lower frame structure is not influenced by the storage lattice frame: the end part of the storage grillwork is restrained by subsequently adjusting the position of the upper pressing plate, so that the device and the storage grillwork can be protected and the device can be conveniently assembled by adopting the scheme.
Meanwhile, after the device is matched with the storage grillwork, the bottom support is provided for the storage grillwork, the end part constraint is provided for the storage grillwork, the stress of the storage grillwork can be effectively avoided or reduced in the transportation process of the storage grillwork, the stability of the shape and the size of the storage grillwork is facilitated, and the subsequent use of the storage grillwork is facilitated.
Meanwhile, the device provides a structural foundation for realizing horizontal transportation and reversible installation of the storage grillwork after being transported to a mounting point, and is convenient for realizing the design and application of the spent fuel storage grillwork which promotes light weight and is easy to treat after decommissioning.
Meanwhile, the integral structure design of the device is convenient for completing the installation of the storage grillwork on the device.
Drawings
Fig. 1 is a schematic structural view of an embodiment of a spent fuel storage grid transportation and turnover device according to the present invention, which is a front view of an upper frame structure;
fig. 2 is a schematic structural view of an embodiment of the spent fuel storage grid transportation and turnover device according to the present invention, which is a front view of a lower frame structure;
fig. 3 is a front view of a spent fuel storage grid transportation and turnover device and a mounting method according to an embodiment of the invention.
The labels in the figure are respectively: 1. the anti-skid device comprises an upper connecting plate, 2, an upper pressing plate, 3, channel steel, 4, an upper frame hoisting point, 5, a turnover hoisting point, 6, a lower connecting plate, 7, an anti-skid pad, 8 and a lower pressing plate.
Detailed Description
The present invention will be described in further detail with reference to the following examples, but the present invention is not limited to the following examples:
example 1:
as shown in fig. 1 to 3, a spent fuel storage grid transportation and turnover device and a mounting method thereof, the device comprises an upper frame structure and a lower frame structure;
the upper frame structure comprises a structure frame, an upper connecting plate 1 arranged on the lower side of the structure frame, an upper frame hoisting point 4 arranged on the upper side of the structure frame, and an upper pressing plate 2 arranged on the side surface of the structure frame;
the lower frame structure comprises a bottom plate, a lower connecting plate 6 arranged at one end of the bottom plate and a lower pressing plate 8 arranged at the other end of the bottom plate;
go up frame construction and can dismantle the connection: the upper frame structure is connected with one end of the lower frame structure through the lower connecting plate 6 and the upper connecting plate 1, the upper pressing plate 2 is positioned at one end of the bottom plate, and the lower pressing plate 8 is positioned at the other end of the bottom plate;
the upper pressing plate 2, the bottom plate and the lower pressing plate 8 form a groove-shaped structure, the upper pressing plate 2 and the lower pressing plate 8 are sides of the groove-shaped structure, and the upper pressing plate 2 and the lower pressing plate 8 are adjustable in position in the groove width direction of the groove-shaped structure.
For the structural design of storage racks, the storage racks are generally arranged: including if the bottom plate that thickness is 30mm sets up the grid body on the bottom plate, form a plurality of vertical square spaces on the last grid body, for in the storage grid of aluminium base boron carbide neutron absorber material, the lateral wall thickness of last grid body can set up to be only 2mm, need not to set up the intensity reinforcement simultaneously at the side of grid body. Meanwhile, the overall dimensions (length, width, height) of the storage lattice can be designed as follows: 2210X 1720X 4425 mm. The structural design of the storage grillwork is to obtain the following technical effects: when the storage framework is decommissioned and subjected to harmless decomposition treatment, the simpler structural form aims to obtain smaller harmless treatment workload and reduce the harmless treatment difficulty.
However, in the storage lattice frame in the above form, the lattice frame itself is relatively heavy (about 7 tons), so that the transfer difficulty of the lattice frame itself is relatively large, and meanwhile, the storage lattice frame itself is compact in structure, has no hanging point, is relatively high in height, and is only suitable for horizontal transportation during specific transportation. However, after the storage grillage is turned over, the rigidity of the storage grillage is insufficient due to the light weight design of the grillage body. Therefore, in order to avoid the change of the shape and the size of the storage grillwork after transportation and installation to influence the normal use of the storage grillwork, the scheme provides the device.
When the device is used specifically: transportation of the storage grid and installation in spent fuel pools can be accomplished as follows:
s1, hoisting the storage grillwork to the lower framework structure in a horizontal posture, supporting the bottom of the storage grillwork on the bottom plate to complete the connection between the upper framework structure and the lower framework structure, performing end constraint on the storage grillwork by using the upper pressing plate 2 and the lower pressing plate 8, and abutting the bottom side of the storage grillwork against the lower pressing plate 8;
s2, transferring the device to a spent fuel pool;
s3, completing the lifting and overturning of the device by using the upper frame lifting points 4, so that the storage grillwork is overturned to a vertical state;
s4, changing the position of at least one of the upper pressing plate 2 and the lower pressing plate 8 in the groove width direction, removing the storage grid constraint and obtaining the storage grid operation gap;
s5, separating the device from the storage grillwork by using a grabbing tool;
and S6, finishing the vertical installation of the storage lattice in the spent fuel pool.
In summary, when the storage lattice is transferred by using the device, firstly, the structural design of the device itself includes the upper pressing plate 2, the bottom plate and the lower pressing plate 8, and meanwhile, the positions of the upper pressing plate 2 and the lower pressing plate 8 are both adjustable in the groove width direction of the groove-shaped structure, when the device is specifically installed, if the storage lattice is hoisted to the lower frame structure in a horizontal posture in step S1, the lower pressing plate 8 is not required to be abutted against the bottom side of the storage lattice when the storage lattice is released to the bottom plate, so that the device itself can be protected and the hoisting release can be conveniently completed: the lower pressing plate 8 is used for restraining the bottom side of the storage grid by subsequently changing the position of the lower pressing plate 8; similarly, when the upper frame structure is installed, for example, by means of lifting, the upper pressing plate 2 does not need to be in contact with the end of the storage lattice when the upper frame structure is released, and meanwhile, the position of matching the upper frame structure with the lower frame structure is not influenced by the storage lattice: the end part of the storage grillwork is restrained by subsequently adjusting the position of the upper pressing plate 2, so that the device and the storage grillwork can be protected and the device can be conveniently assembled by adopting the scheme.
Meanwhile, after the device is matched with the storage grillwork, the bottom support is provided for the storage grillwork, the end part constraint is provided for the storage grillwork, the stress of the storage grillwork can be effectively avoided or reduced in the transportation process of the storage grillwork, the stability of the shape and the size of the storage grillwork is facilitated, and the subsequent use of the storage grillwork is facilitated.
Meanwhile, the device provides a structural foundation for realizing horizontal transportation and reversible installation of the storage grillwork after being transported to a mounting point, and is convenient for realizing the design and application of the spent fuel storage grillwork which promotes light weight and is easy to treat after decommissioning.
Meanwhile, the integral structure design of the device is convenient for completing the installation of the storage grillwork on the device.
Example 2:
this embodiment is further limited based on embodiment 1, as shown in fig. 1 to 3, in order to avoid the sliding of the storage rack on the device, which may cause the abrasion of the stainless steel on the outer layer thereof, and the loose fit relationship introduces the potential safety hazard for transportation and transfer, it is configured as follows: and the top surface of the bottom plate is also provided with an anti-skid pad 7.
In the technical scheme who provides as above, because last frame hoisting point 4 is after storage framework transports in place for storage framework, to storage framework on the device hoisting point when overturning, in order to realize for the lower frame structure is idle or put immediately when transporting in order to reduce it and occupy the horizontal plane area size, set up to: and one end of the bottom plate, which is used for fixing the upper frame structure, is also provided with a turnover hoisting point 5. The overturning lifting point 5 is used for separating the lower frame structure from the upper frame structure and then vertically placing the lower frame structure to achieve the purpose of reducing the area of the horizontal plane occupied by the lower frame structure. As a person skilled in the art, in the present embodiment, all technical terms related to the suspension points, such as the upper frame suspension point 4 and the turning suspension point 5, are actually only suspension points, and the use of different technical terms is only intended to distinguish different suspension points.
As a simple structure can form the surrounding edge around the bottom plate to avoid the storage grillwork of horizontal posture under the abnormal condition to slide out from this device's technical scheme, set up to: the structure frame comprises a first vertical frame and a second vertical frame, one end of the first vertical frame is connected with one end of the second vertical frame, the first vertical frame and the second vertical frame form an L-shaped structure in a surrounding mode, and the upper pressing plate 2 is installed on the first vertical frame;
a third vertical frame is further arranged at one end, provided with the lower pressing plate 8, of the bottom plate, the lower pressing plate 8 is installed on the third vertical frame, and a pull rod is further arranged between the third vertical frame and the bottom plate;
after the upper frame structure and the lower frame structure are connected, the first vertical frame and the third vertical frame are used as the surrounding edges on one pair of opposite sides of the bottom plate, and the second vertical frame and the pull rod are used as the surrounding edges on the other pair of opposite sides of the bottom plate.
As an implementation scheme with low material cost and high structural strength: the upper frame structure and the lower frame structure are formed by welding channel steel 3.
For being favorable to going up frame construction and lower frame construction's cooperation efficiency, set up as: and a positioning mechanism is also arranged between the upper frame structure and the lower frame structure and is used for assisting in determining the relative position between the upper frame structure and the lower frame structure. When the positioning mechanism is used specifically, the positioning mechanism can be realized by adopting a positioning plate, a positioning pin and the like. The upper frame structure and the lower frame structure are preferably connected by bolts.
As a simple structure's top board 2 and 8 position adjustment modes of holding down plate, set up to: the positions of the upper pressing plate 2 and the lower pressing plate 8 are adjustable and are realized through thread transmission.
As a specific implementation mode of the thread transmission, the thread transmission is provided with the following steps: the thread transmission is realized in the following mode: including many drive screw that correspond with top board 2 and holding down plate 8 respectively, still include for structure frame or bottom plate rigidity, a plurality of internal thread holes that correspond with drive screw, drive screw and the internal thread hole threaded connection who corresponds with it, top board 2 or holding down plate 8 and the drive screw rotatable coupling who corresponds separately, and top board 2 or holding down plate 8 are fixed in the position that corresponds on the drive screw axis. In the scheme, for the upper pressure plate 2, if the upper pressure plate 2 is fixed on the first vertical frame with the wings, the corresponding internal thread hole is arranged on the first vertical frame; for the lower pressing plate 8, the internal thread hole is arranged on the third vertical frame.
As a concrete implementation mode with light weight and high structural strength, the structure is as follows: the upper frame structure and the lower frame structure are truss structures.
Example 3:
the present embodiment provides a specific mounting method based on embodiment 1 or 2:
the scheme also discloses a spent fuel storage grid mounting method, which is used for realizing the mounting of the spent fuel storage grid in a spent fuel pool, and the method is based on the device in any one of the above steps, and comprises the following steps which are carried out in sequence:
s1, hoisting the storage grillwork to the lower framework structure in a horizontal posture, supporting the bottom of the storage grillwork on the bottom plate to complete the connection between the upper framework structure and the lower framework structure, performing end constraint on the storage grillwork by using the upper pressing plate 2 and the lower pressing plate 8, and abutting the bottom side of the storage grillwork against the lower pressing plate 8;
s2, transferring the device to a spent fuel pool;
s3, completing the lifting and overturning of the device by using the upper frame lifting points 4, so that the storage grillwork is overturned to a vertical state;
s4, changing the position of at least one of the upper pressing plate 2 and the lower pressing plate 8 in the groove width direction, removing the storage grid constraint and obtaining the storage grid operation gap;
s5, separating the device from the storage grillwork by using a grabbing tool;
and S6, finishing the vertical installation of the storage lattice in the spent fuel pool.
More specifically:
checking to confirm that the upper frame structure and the lower frame structure are not deformed and are separated;
horizontally hoisting the spent fuel storage grillwork to the lower frame structure, and checking to confirm that the spent fuel storage grillwork is contacted with the anti-skid pad 7;
connecting the sling with an upper frame hoisting point 4, hoisting the upper frame structure above the lower frame structure to center the upper connecting plate 1 and the lower connecting plate 6, and connecting the upper connecting plate 1 and the lower connecting plate 6 through a pin shaft and a bolt;
the upper pressing plate 2, the lower pressing plate 8 and the spent fuel storage grillwork are pressed tightly to prevent the spent fuel storage grillwork from sliding;
and transferring the spent fuel storage grillwork.
Turnover of spent fuel storage grillwork
Connecting the lifting hook and the lifting belt with the overturning lifting point 5;
lifting a lifting hook, and horizontally turning the spent fuel storage grillwork and the turning device into a vertical state;
the upper pressing plate 2 and the lower pressing plate 8 are retracted to form a certain gap with the spent fuel storage grillwork;
hoisting the spent fuel storage grillwork out of the turnover device by using a gripping tool;
connecting the lifting hook and the lifting belt with the overturning lifting point 5;
turning the turning device from vertical to horizontal;
and the transferring and overturning device is used for overturning the spent fuel storage grillwork.
The foregoing is a more detailed description of the present invention in connection with specific preferred embodiments thereof, and it is not intended that the specific embodiments of the present invention be limited to these descriptions. For those skilled in the art to which the invention pertains, other embodiments that do not depart from the gist of the invention are intended to be within the scope of the invention.
Claims (10)
1. A spent fuel storage grillwork transporting and overturning device is characterized by comprising an upper frame structure and a lower frame structure;
the upper frame structure comprises a structure frame, an upper connecting plate (1) arranged on the lower side of the structure frame, an upper frame hoisting point (4) arranged on the upper side of the structure frame, and an upper pressing plate (2) arranged on the side surface of the structure frame;
the lower frame structure comprises a bottom plate, a lower connecting plate (6) arranged at one end of the bottom plate and a lower pressing plate (8) arranged at the other end of the bottom plate;
go up frame construction and can dismantle the connection: the upper frame structure is connected with one end of the lower frame structure through the lower connecting plate (6) and the upper connecting plate (1), the upper pressing plate (2) is positioned at one end of the bottom plate, and the lower pressing plate (8) is positioned at the other end of the bottom plate;
the upper pressing plate (2), the bottom plate and the lower pressing plate (8) form a groove-shaped structure, the upper pressing plate (2) and the lower pressing plate (8) are sides of the groove-shaped structure, and the upper pressing plate (2) and the lower pressing plate (8) are adjustable in position in the groove width direction of the groove-shaped structure.
2. The spent fuel storage grid transportation and turnover device of claim 1, wherein the top surface of the bottom plate is further provided with a non-slip mat (7).
3. The spent fuel storage lattice transportation and turnover device of claim 1, wherein the end of the bottom plate for fixing the upper frame structure is further provided with a turnover hanging point (5).
4. The spent fuel storage lattice transportation and turnover device of claim 1, wherein the structural frame comprises a first vertical frame and a second vertical frame, one end of the first vertical frame is connected with one end of the second vertical frame, the first vertical frame and the second vertical frame form an L-shaped structure, and the upper pressing plate (2) is mounted on the first vertical frame;
a third vertical frame is further arranged at one end, provided with the lower pressing plate (8), of the bottom plate, the lower pressing plate (8) is installed on the third vertical frame, and a pull rod is further arranged between the third vertical frame and the bottom plate;
after the upper frame structure and the lower frame structure are connected, the first vertical frame and the third vertical frame are used as the surrounding edges on one pair of opposite sides of the bottom plate, and the second vertical frame and the pull rod are used as the surrounding edges on the other pair of opposite sides of the bottom plate.
5. The spent fuel storage lattice transportation and turnover device of claim 1, wherein the upper frame structure and the lower frame structure are formed by welding channel steel.
6. The spent fuel storage lattice transportation and turnover device of claim 1, wherein a positioning mechanism is further disposed between the upper frame structure and the lower frame structure, and the positioning mechanism is used for assisting in determining the relative position between the upper frame structure and the lower frame structure.
7. The spent fuel storage grid transportation and turnover device is characterized in that the positions of the upper pressing plate (2) and the lower pressing plate (8) are adjustable through screw transmission.
8. The spent fuel storage grid transportation and turnover device of claim 7, wherein the thread transmission is realized by the following steps: including many driving screw that correspond with top board (2) and holding down plate (8) respectively, still include for structure frame or bottom plate rigidity, a plurality of internal thread holes that correspond with driving screw, driving screw and the internal thread hole threaded connection who corresponds with it, top board (2) or holding down plate (8) and the driving screw rotatable coupling who corresponds separately, and top board (2) or holding down plate (8) are fixed in position on corresponding driving screw axis.
9. The spent fuel storage lattice transportation and turnover device of claim 1, wherein the upper frame structure and the lower frame structure are truss structures.
10. The spent fuel storage grid installation method according to claim 1, for implementing the installation of spent fuel storage grids in spent fuel pools, wherein the method is based on the device of any one of claims 1 to 9, and comprises the following steps performed in sequence:
s1, hoisting the storage grillwork to the lower framework structure in a horizontal posture, supporting the bottom of the storage grillwork on the bottom plate to complete the connection of the upper framework structure and the lower framework structure, performing end constraint on the storage grillwork by using the upper pressing plate (2) and the lower pressing plate (8), and enabling the bottom side of the storage grillwork to be abutted against the lower pressing plate (8);
s2, transferring the device to a spent fuel pool;
s3, completing the lifting and overturning of the device by using the upper frame lifting point (4), so that the storage grillwork is overturned to a vertical state;
s4, changing the position of at least one of the upper pressure plate (2) and the lower pressure plate (8) in the groove width direction, removing the storage grid constraint and obtaining the storage grid operation gap;
s5, separating the device from the storage grillwork by using a grabbing tool;
and S6, finishing the vertical installation of the storage lattice in the spent fuel pool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010697112.2A CN111824938A (en) | 2020-07-20 | 2020-07-20 | Spent fuel storage framework transporting and overturning device and mounting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010697112.2A CN111824938A (en) | 2020-07-20 | 2020-07-20 | Spent fuel storage framework transporting and overturning device and mounting method |
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| Publication Number | Publication Date |
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| CN111824938A true CN111824938A (en) | 2020-10-27 |
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| CN202010697112.2A Pending CN111824938A (en) | 2020-07-20 | 2020-07-20 | Spent fuel storage framework transporting and overturning device and mounting method |
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| CN113421672A (en) * | 2021-06-11 | 2021-09-21 | 中国核电工程有限公司 | In-pool split equipment for spent fuel storage pool and spent fuel storage system |
| CN113562371A (en) * | 2021-07-09 | 2021-10-29 | 中国核电工程有限公司 | Liftable rod box temporary storage device |
| CN114582536A (en) * | 2020-11-30 | 2022-06-03 | 中国核工业二三建设有限公司 | Automatic turnover system of spent fuel storage grillwork for nuclear island fuel plant |
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