Mixing and pouring platform for shielding layer of nuclear storage and transportation container

Abstract

The utility model provides a shielding layer material mixing and pouring platform of a nuclear storage and transportation container, and belongs to the technical field of spent fuel post-processing, the shielding layer material mixing and pouring platform of the nuclear storage and transportation container comprises a material mixing system and a storage and transportation container which are integrated on a main platform, material mixing and pouring are carried out on the main platform, the operation is convenient and fast, and the working efficiency is improved. The pouring efficiency of the shielding layer can be improved; a first raw material and a second raw material are mixed in the material mixing system, the vacuum system vacuumizes the material mixing system and the shielding interlayer, the materials mixed by the material mixing system enter the material distributor and are conveyed into the corresponding pouring cavities through the material distributing pipes of the material distributor, and multi-path vacuum pouring is performed in the storage and transportation container at the same time. The bubble defect during curing of the shielding material is reduced, the defoaming effect of pouring of the shielding material is guaranteed, the pouring quality of the shielding layer is improved, and meanwhile the pouring efficiency is improved.

Description

Technical Field

[0001] This application belongs to the field of spent fuel reprocessing technology, specifically relating to a shielding layer mixing and casting platform for nuclear storage and transportation containers. Background Technology

[0002] Spent fuel storage and transport containers are devices used to transport and store highly radioactive fuel assemblies produced by nuclear facilities. They are high-value equipment in the field of spent fuel reprocessing. The container shell is composed of multiple layers of materials with various structures and functions. Among them, the neutron shielding layer is an essential structure in the storage and transport container, used to moderate and absorb neutrons, so that the radiation dose around the storage and transport container reaches the safe conditions for transportation and storage.

[0003] The shielding layer is generally made by casting a thermosetting composite material, such as boron-containing epoxy resin, into the interlayer of the container body and then curing it. Since thermosetting resin composite materials are also widely used as insulation materials in transformers, the casting system and process used for transformer resin insulation materials are generally employed to cast the shielding layer of the storage and transportation container. However, the size of spent fuel storage and transportation containers is much larger than that of transformers, resulting in poor compatibility between the transformer casting system and the storage and transportation container, which affects the mixing, casting uniformity, and degassing effect of the shielding layer. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art or related technologies.

[0005] In view of this, according to an embodiment of this application, a shielding layer mixing and casting platform for nuclear storage and transportation containers is proposed, comprising:

[0006] Main platform;

[0007] The mixing system is located on the main platform and is used to mix the first raw material and the second raw material.

[0008] The feeder has its input end connected to the output end of the mixing system. The feeder includes at least two feed pipes to output materials through the feed pipes.

[0009] The storage and transportation container includes a shielding interlayer, which includes at least two casting cavities. Each casting cavity corresponds to a distribution pipe, and the casting cavity is connected to the output end of the distribution pipe.

[0010] Vacuum systems are used to vacuum mixing systems and storage containers.

[0011] In one feasible implementation, the mixing system includes:

[0012] The first premixing and degassing tank is used to stir the first raw material and is connected to the vacuum system.

[0013] The second premixing and degassing tank is used to stir the second raw material and is connected to the vacuum system.

[0014] The final mixing tank is located below the first premixing and degassing tank and the second premixing and degassing tank. The final mixing tank is connected to the vacuum system. The input end of the final mixing tank is connected to the output end of the first premixing and degassing tank, and the input end of the final mixing tank is connected to the output end of the second premixing and degassing tank. The final mixing tank is used to mix the first raw material and the second raw material to form the material. The output end of the final mixing tank is connected to the input end of the distributor to input the material into the distributor.

[0015] In one feasible implementation, the mixing system further includes:

[0016] The integrated cooling and heating unit is connected to the first premixing and degassing tank and controls the temperature of the first premixing and degassing tank; the integrated cooling and heating unit is connected to the second premixing and degassing tank and controls the temperature of the second premixing and degassing tank; the integrated cooling and heating unit is connected to the final mixing tank and controls the temperature of the final mixing tank.

[0017] In one feasible implementation, the main platform includes a premixing and degassing operation platform, a final mixing operation platform, and a support platform arranged sequentially from top to bottom; a first premixing and degassing tank and a second premixing and degassing tank are arranged on the premixing and degassing operation platform; a final mixing tank is arranged on the final mixing operation platform; and a vacuum system is arranged on the support platform.

[0018] The main platform also includes a casting operation platform, which is located on one side of the support platform, and the storage and transportation container is installed through the casting operation platform.

[0019] In one feasible implementation, the shielding layer mixing and casting platform for nuclear storage and transportation containers further includes:

[0020] A cleaning fluid storage tank is mounted on a support platform and is detachably connected to a distributor to collect the cleaning fluid flowing out of the distributor.

[0021] In one feasible implementation, two storage and transportation containers are provided, and the distributor is movable in the horizontal direction to adjust the position of the distributor relative to the storage and transportation containers; the distributor includes a dispensing pipe, which is detachably connected to the storage and transportation containers;

[0022] The number of distribution pipes shall not be less than the number of casting cavities in any storage and transportation container.

[0023] In one feasible embodiment, the storage and transport container includes a casting assembly, which includes:

[0024] Vacuum port, which is connected to the vacuum system;

[0025] The pouring gate has its inlet end connected to the outlet end of the distribution pipe, and its outlet end connected to the pouring cavity.

[0026] A liquid level measuring port is provided, and a liquid level gauge is installed on the liquid level measuring port to detect the liquid level in the storage and transportation container.

[0027] In one feasible implementation, the storage and transportation container is located below the distribution pipe, and the material flows into the corresponding casting cavity through the distribution pipe from the pouring port under the action of gravity.

[0028] In one feasible implementation, a sealing top plate is provided on the shielding interlayer, and the casting assembly is arranged on the sealing top plate.

[0029] In one feasible implementation, the shielding layer mixing and casting platform for nuclear storage and transportation containers further includes:

[0030] The feeding machine is installed on the mixing system;

[0031] The overhead crane lifts the first and second raw materials from the ground to the preset positions on the main platform for loading.

[0032] The shielding layer mixing and casting platform for nuclear storage and transportation containers disclosed in this application has the following advantages compared to the prior art:

[0033] The shielding layer mixing and casting platform for nuclear storage and transportation containers provided in this application includes a mixing system, a distributor, a storage and transportation container, and a vacuum system. The mixing system and the storage and transportation container are integrated on the main platform. Mixing and casting are performed on the main platform, which is convenient and helps to improve the casting efficiency of the shielding layer. The first raw material and the second raw material are mixed in the mixing system. The vacuum system performs vacuum treatment on the mixing system and the shielding interlayer. The material after mixing by the mixing system enters the distributor and is transported to the corresponding casting cavity through the distributor's distribution pipe. Multiple vacuum casting is performed simultaneously in the storage and transportation container to reduce air bubble defects during the curing of the shielding material, ensure the degassing effect of the shielding material casting, improve the casting quality of the shielding layer, and improve the casting efficiency. Attached Figure Description

[0034] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0035] Figure 1 A schematic structural diagram of a shielding layer mixing and casting platform for a nuclear storage and transportation container according to an embodiment of this application;

[0036] in, Figure 1 The correspondence between the reference numerals and component names in the attached drawings is as follows:

[0037] 11. Main platform; 12. Mixing system; 13. Distributor; 14. Storage and transportation container; 15. Vacuum system; 17. Feeder; 18. Overhead crane; 19. Sealed top plate;

[0038] 111. Premixing and degassing operation platform; 112. Final mixing operation platform; 113. Support platform; 114. Casting operation platform;

[0039] 121. First premixing and degassing tank; 122. Second premixing and degassing tank; 123. Final mixing tank; 124. Integrated heating and cooling unit;

[0040] 140. Casting assembly; 141. Vacuum port; 142. Casting port; 143. Liquid level measuring port. Detailed Implementation

[0041] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0042] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0043] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0044] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0045] like Figure 1 As shown in the embodiments of this application, a shielding layer mixing and casting platform for a nuclear storage and transportation container 14 is proposed, comprising: a main platform 11, a mixing system 12, a distributor 13, a storage and transportation container 14, and a vacuum system 15; the storage and transportation container 14 includes a casting assembly 140, the mixing system 12 and the storage and transportation container 14 are disposed on the main platform 11, the mixing system 12 is used to mix a first raw material and a second raw material; the input end of the distributor 13 is connected to the output end of the mixing system 12, and the distributor 13 includes at least two distribution pipes to output materials through the distribution pipes; the storage and transportation container 14 includes a shielding interlayer, the shielding interlayer includes at least two casting cavities, the casting cavities correspond one-to-one with the distribution pipes, and the casting cavities are connected to the output ends of the distribution pipes; the vacuum system 15 is used to perform vacuum treatment on the mixing system 12 and the storage and transportation container 14.

[0046] The shielding layer mixing and casting platform of the nuclear storage and transportation container 14 provided in this application embodiment includes a mixing system 12, a distributor 13, a storage and transportation container 14, and a vacuum system 15. The mixing system 12 and the storage and transportation container 14 are integrated on the main platform 11. Mixing and casting are carried out on the main platform 11, which is convenient and helps to improve the casting efficiency of the shielding layer. The first raw material and the second raw material are mixed in the mixing system 12. The vacuum system 15 performs vacuum treatment on the mixing system 12 and the shielding interlayer. The material after mixing in the mixing system 12 enters the distributor 13 and is transported to the corresponding casting cavity through the distributor pipe of the distributor 13. Multiple vacuum casting is carried out simultaneously in the storage and transportation container 14 to reduce the bubble defects during the curing of the shielding material, ensure the degassing effect of the shielding material casting, improve the casting quality of the shielding layer, and improve the casting efficiency.

[0047] Furthermore, a control cabinet is also installed on the main platform 11. The control cabinet is connected to the mixing system 12, the vacuum system 15 and the switching valves, so as to realize the automatic control of the mixing system 12, the vacuum system 15 and the switching valves through the control cabinet.

[0048] Specifically, the vacuum system 15 includes a vacuum pump or a vacuum pump and a Roots pump, as well as auxiliary equipment such as a vacuum pump protection device, to ensure that the vacuum system 15 has sufficient vacuum level and stability, so that after the mixing system 12 and the storage and transportation container 14 are evacuated, a stable vacuum state is maintained. As a preferred embodiment, the vacuum system 15 is connected to the shielding interlayer to directly evacuate the shielding interlayer, thereby improving the efficiency of vacuum treatment of the storage and transportation container 14.

[0049] In some examples, when the top of the casting cavity is open, a separate sealing top plate 19 needs to be designed and fabricated for each casting cavity to seal it. In this case, the casting assembly 140 is arranged on the sealing top plate 19. After the casting cavity is poured, the sealing top plate 19 is removed. When the casting cavity is sealed, the shielding interlayer includes the sealing top plate 19, which has a casting opening. The casting assembly 140 is arranged directly on the casting opening, and the casting opening needs to be sealed by welding after the casting is completed.

[0050] It should be noted that the casting cavities can be completely isolated from each other, or they can be connected through the connecting holes on the isolation surface of the shielding interlayer. Whether the casting cavities are connected depends on the design of the storage and transportation container 14. When the casting cavities are connected, multi-channel vacuum casting can also be used to improve the casting efficiency of the storage and transportation container 14.

[0051] It is understandable that, depending on actual usage requirements, the storage and transportation container 14 may also be provided with only one casting cavity. When the storage and transportation container 14 has only one casting cavity, the distributor 13 is provided with at least one distribution pipe.

[0052] like Figure 1 As shown, in one feasible embodiment, the mixing system 12 includes: a first premixing and degassing tank 121, a second premixing and degassing tank 122, and a final mixing tank 123; the first premixing and degassing tank 121 is used to stir a first raw material and is connected to a vacuum system 15; the second premixing and degassing tank 122 is used to stir a second raw material and is connected to the vacuum system 15; the final mixing tank 123 is disposed below the first premixing and degassing tank 121 and the second premixing and degassing tank 122, and is connected to the vacuum system 15. The input end of the final mixing tank 123 is connected to the output end of the first premixing and degassing tank 121, and the input end of the final mixing tank 123 is connected to the output end of the second premixing and degassing tank 122. The final mixing tank 123 is used to mix the first raw material and the second raw material to form a material; the output end of the final mixing tank 123 is connected to the input end of the distributor 13 to input the material into the distributor 13.

[0053] In this technical solution, the first raw material is fed into the first premixing and degassing tank 121, and the second raw material is fed into the second premixing and degassing tank 122. The first premixing and degassing tank 121 and the second premixing and degassing tank 122 are evacuated by the vacuum system 15 to achieve independent vacuum mixing of the first and second raw materials, thereby improving the degassing effect of the first and second raw materials before mixing. The first and second raw materials after mixing are fed into the final mixing tank 123, where they are mixed under vacuum to achieve large-volume mixing. The mixed material is then conveyed to the distributor 13, which helps to improve the subsequent casting efficiency.

[0054] In some examples, the first raw material is resin and other fillers, and the second raw material is curing agent and other fillers.

[0055] like Figure 1 As shown, in one feasible embodiment, the mixing system 12 further includes: a heating and cooling integrated machine 124, which is connected to a first premixing and degassing tank 121 and controls the temperature of the first premixing and degassing tank 121; the heating and cooling integrated machine 124 is connected to a second premixing and degassing tank 122 and controls the temperature of the second premixing and degassing tank 122; and the heating and cooling integrated machine 124 is connected to a final mixing tank 123 and controls the temperature of the final mixing tank 123.

[0056] In this technical solution, the integrated heating and cooling machine 124 is connected to the first premixing degassing tank 121, the second premixing degassing tank 122, and the final mixing tank 123, and can control the temperature of the first premixing degassing tank 121, the second premixing degassing tank 122, and the final mixing tank 123 respectively; the integrated heating and cooling machine 124 controls the temperature rise of the first premixing degassing tank 121 and the second premixing degassing tank 122 to achieve vacuum stirring, heating, and degassing of the first and second raw materials, thereby reducing the viscosity of the first and second raw materials and improving the vacuum degassing effect of the first and second raw materials; after the first and second raw materials are degassed, the heating and cooling machine... The integrated machine 124 controls the cooling of the first premixing and degassing tank 121 and the second premixing and degassing tank 122 to prevent the first and second raw materials with high temperatures from immediately undergoing a solidification reaction after entering the final mixing tank 123, so as to ensure the uniformity of the subsequent mixing and the degassing effect in the final mixing tank 123; the integrated machine 124 controls the cooling of the final mixing tank 123 so that after the first and second raw materials enter the final mixing tank 123, the heat released by the cross-linking of the materials is dissipated, avoiding the solidification of the materials in the final mixing tank 123 due to the increase in mixing temperature, thereby extending the final mixing time and the pouring time, and ensuring the smoothness and continuity of the pouring.

[0057] In this technical solution, the integrated heating and cooling machine 124 is used to heat the bodies of the first premixed degassing tank 121 and the second premixed degassing tank 122, ensuring that the first raw material can undergo vacuum stirring and heating degassing for a sufficient duration in the first premixed degassing tank 121, and the second raw material can undergo vacuum stirring and heating degassing for a sufficient duration in the second premixed degassing tank 122, thereby reducing the viscosity of the first and second raw materials and improving the vacuum degassing effect. The integrated heating and cooling machine 124 is used to heat and cool the body of the final mixing tank 123. The first and second raw materials enter the final mixing tank 123 and are cooled to a suitable temperature before final mixing, preventing the resin and curing agent degassing materials at high temperatures from immediately solidifying inside the final mixing tank 123, ensuring the smooth progress of the final mixing process.

[0058] As a preferred embodiment, the heavier first raw material enters the final mixing tank 123 under gravity and is then cooled to the required temperature by the integrated heating and cooling machine 124. The lighter second raw material enters the final mixing tank 123 under gravity and is then neutralized with the heavier, cooled first raw material to a suitable temperature. This process reduces material residue in both the first and second premixing tanks. During the final mixing and pouring process, the integrated heating and cooling machine 124 continues to dissipate heat released from the cross-linking of the materials, preventing the mixing temperature from rising and thus avoiding solidification of the materials in the tanks. This extends the final mixing time and pouring time, and increases the amount of material mixed at one time, which is beneficial for achieving large-volume mixing.

[0059] like Figure 1 As shown, in one feasible embodiment, the main platform 11 includes a premixing and degassing operation platform 111, a final mixing operation platform 112, and a support platform 113 arranged sequentially from top to bottom; a first premixing and degassing tank 121 and a second premixing and degassing tank 122 are disposed on the premixing and degassing operation platform 111; a final mixing tank 123 is disposed on the final mixing operation platform 112; a vacuum system 15 is disposed on the support platform 113; the main platform 11 also includes a casting operation platform 114, which is arranged on one side of the support platform 113, and a storage and transportation container 14 is disposed through the casting operation platform 114.

[0060] In this technical solution, the main platform 11 has at least three layers. The premixing, final mixing and pouring operations are completed on the corresponding platforms, which effectively arranges the work space and ensures that the various operations do not interfere with or affect each other, which is conducive to ensuring the orderly progress of the mixing and pouring work. The pouring operation platform 114 and the support platform 113 are set at the same height. The storage and transportation container 14 passes through the pouring operation platform 114 to facilitate the overall hoisting of the storage and transportation container 14, and at the same time, it is convenient to observe and control the pouring process of the storage and transportation container 14 on the pouring operation platform 114.

[0061] In one feasible implementation, the shielding layer mixing and casting platform of the nuclear storage and transportation container 14 further includes a cleaning fluid storage tank, which is disposed on the support platform 113 and is detachably connected to the distributor 13 to collect the cleaning fluid flowing out from the distributor 13.

[0062] In this technical solution, the cleaning fluid storage tank is detachably connected to the distributor 13. After the pouring is completed, the cleaning fluid storage tank is connected to the output end of the distributor 13 so that the cleaning fluid generated after the mixing system 12 and the distributor 13 are cleaned can be collected and placed in the cleaning fluid storage tank for later use.

[0063] In some examples, after casting, the cleaning solution is pumped into the first premixing and degassing tank 121 and the second premixing and degassing tank 122 by an electric pump for stirring. After cleaning, the cleaning solution flows into the final mixing tank 123 under gravity. After stirring and cleaning in the final mixing tank 123, it flows into the cleaning solution storage tank through the distributor 13 for static storage until use. During the cleaning solution discharge process, all relevant valves are opened and closed multiple times to clean the valve cores, achieving a thorough and comprehensive cleaning of the mixing system 12 and the distributor 13. Specifically, at least a first discharge valve is provided at the output end of the distributor pipe to control the discharge from the distributor pipe.

[0064] like Figure 1 As shown, in one feasible embodiment, two storage and transportation containers 14 are provided, and the distributor 13 is movable in the horizontal direction to adjust the position of the distributor 13 relative to the storage and transportation container 14; the distributor 13 includes a distribution pipe, which is detachably connected to the storage and transportation container 14; wherein, the number of distribution pipes is not less than the number of casting cavities in any one of the storage and transportation containers 14.

[0065] In this technical solution, the pouring operation platform 114 is arranged with two container pouring positions, which can pour the two storage and transportation containers 14 in turn. The material in one storage and transportation container 14 is used to mix and pour the material into the other storage and transportation container 14 during the solidification time. By moving the distributor 13 horizontally, the relative position of the distributor 13 and the storage and transportation container 14 to be poured is adjusted, thereby improving the efficiency and continuity of the pouring work. By ensuring that the number of distribution pipes is not less than the number of pouring cavities in any one storage and transportation container 14, each pouring cavity has a distribution pipe for pouring when pouring a single storage and transportation container 14, ensuring the uniformity of the pouring.

[0066] In some examples, the storage and transport container 14 may also be arranged as a single one, with the number of distribution pipes being the same as the number of casting cavities within the storage and transport container 14.

[0067] As a preferred embodiment, each of the two storage and transportation containers 14 is provided with at least two casting cavities, and the distributor 13 is provided with at least two distribution pipes. The distribution pipes respectively pour at least two casting cavities in the same storage and transportation container 14. After one storage and transportation container 14 is poured, the other storage and transportation container 14 is poured.

[0068] like Figure 1 As shown, in one feasible embodiment, the storage and transportation container 14 includes a casting assembly 140, which includes a vacuum port 141, a casting port 142, and a liquid level measuring port 143. The vacuum port 141 is connected to the vacuum system 15. The input end of the casting port 142 is connected to the output end of the distribution pipe, and the output end of the casting port 142 is connected to the casting cavity. A liquid level gauge is provided on the liquid level measuring port 143 to detect the liquid level in the storage and transportation container 14.

[0069] In this technical solution, the storage and transportation container 14 is connected to the vacuum system 15 through the vacuum port 141 so that the storage and transportation container 14 is evacuated by the vacuum system 15; the material distribution pipe pours the mixed and degassed material into the pouring cavity of the storage and transportation container 14 through the pouring port 142; by installing a level gauge on the liquid level measuring port 143, the liquid level during the pouring process is directly detected, and the pouring height of the liquid surface is measured, so as to facilitate precise control of the pouring volume.

[0070] In one feasible implementation, the storage and transportation container 14 is located below the distribution pipe, and the material flows into the corresponding casting cavity from the pouring port 142 through the distribution pipe under the action of gravity.

[0071] In this technical solution, the storage and transportation container 14 is set below the distribution pipe so that the material can flow into the corresponding pouring cavity from the pouring port 142 by its own gravity, preventing the pressurization device from introducing external air during the pouring process, avoiding the pouring process from damaging the defoaming effect of the material, and ensuring that the material in the pouring cavity is uniform and defoamed.

[0072] like Figure 1 As shown, in one feasible embodiment, a sealing top plate 19 is provided on the shielding interlayer, and the casting assembly 140 is arranged on the sealing top plate 19.

[0073] In this technical solution, when the top of the casting cavity is not connected, each casting cavity is equipped with a corresponding vacuum port 141, casting port 142, and liquid level measuring port 143 to ensure the vacuum casting state of each casting cavity. The liquid level gauge measures the liquid level height in the corresponding casting cavity in real time during the casting process, so as to control and evenly distribute the casting amount in each casting cavity, avoid the problem of uneven curing temperature, curing degree, and curing performance caused by uneven casting amount distribution, and improve the casting quality.

[0074] In some examples, the top of the casting cavity can also be connected. When the top of the casting cavity is connected, the vacuum port 141 is provided on at least one sealed top plate 19, and only one vacuum port 141 is needed to evacuate the entire container shielding interlayer.

[0075] It should be noted that "connected at the top of the casting cavity" means that gas can flow between the casting cavities, and at this time the gas pressure in each casting cavity is the same.

[0076] Furthermore, the bottom of the final mixing tank 123 is equipped with a second discharge valve and a discharge pipe. After opening the second discharge valve, the mixed material flows through the discharge pipe and the distributor 13 from the pouring port 142 into the corresponding pouring cavity under gravity. By measuring the slurry height during pouring using a level gauge, and coordinating with the first and second discharge valves, the pouring volume of each pouring cavity is evenly distributed, improving pouring uniformity. Specifically, the first premixing and degassing tank 121, the second premixing and degassing tank 122, and the output end of the distributor 13 are all equipped with corresponding valve and pipe assemblies to improve the control accuracy of the mixing and pouring volume.

[0077] Furthermore, the casting assembly 140 also includes an observation port and a vent. The vent is used to depressurize the casting cavity and release the vacuum state of the casting cavity after casting. The observation port is used to observe the casting process of the casting cavity.

[0078] like Figure 1 As shown, in one feasible embodiment, the shielding layer mixing and casting platform of the nuclear storage and transportation container 14 further includes: a feeder 17 and a gantry crane 18; the feeder 17 is disposed on the mixing system 12; the gantry crane 18 is preferably disposed on the main platform 11.

[0079] In this technical solution, the feeder 17 is installed on the first premix degassing tank 121 and / or the second premix degassing tank 122 to add powder raw materials into the first premix degassing tank 121 and / or the second premix degassing tank 122; the overhead crane 18 is used to lift the first raw material and the second raw material from the ground lifting device to the required position on the main platform 11. The feeding process is highly automated and the feeding is convenient and efficient.

[0080] Example:

[0081] The shielding material, totaling 500 kg, was weighed according to the proportions of resin, curing agent, and filler. The resin was placed in the first premixing degassing tank, and the curing agent in the second premixing degassing tank. The ratio of resin to filler in the degassing tank was such that the slurry viscosity was close to that of the resin to facilitate degassing. Simultaneously, the raw materials in the first and second premixing degassing tanks were subjected to vacuum stirring and degassing at a mixing temperature of 60℃, a vacuum degree ≤300Pa, and a stirring speed of 70 r / min for 4 hours.

[0082] After premixing, the first premixing degassing tank, the second premixing degassing tank, and the final mixing tank are simultaneously vacuumed. Since the weight of the resin composite slurry of the shielding material is significantly greater than that of the curing agent composite slurry, the valve at the bottom of the first premixing degassing tank is opened first, allowing the degassed resin composite slurry to flow into the final mixing tank under gravity. The first degassed material is cooled to approximately 25°C using a combined heating and cooling system. Then, the valve at the bottom of the second premixing degassing tank is opened, allowing the degassed curing agent composite slurry to flow into the final mixing tank under gravity. After the first and second degassed materials are mixed, the temperature rises to approximately 33°C. Final mixing is then performed at a vacuum degree ≤300Pa, a stirring speed of 70 r / min, and a mixing time of 30 minutes. During final mixing, the temperature of the final mixed material is continuously controlled at 30–35°C using a combined heating and cooling system. After final mixing, all the final mixed material is vacuum-cast into multiple casting cavities within the shielding jacket of the storage and transportation container. Finally, after the casting is completed, the vacuum is released and the pressure is restored to normal. At the same time, the residual slurry in the first premix degassing tank, the second premix degassing tank, the final mixing tank, their valves, and pipelines is cleaned with cleaning fluid under normal pressure to complete one casting operation.

[0083] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0084] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A shielding layer mixing and casting platform for a nuclear storage and transportation container, characterized in that, The shielding layer mixing and casting platform of the nuclear storage and transportation container includes: Main platform; A mixing system is installed on the main platform and is used to mix a first raw material and a second raw material. The material distributor has its input end connected to the output end of the mixing system, and includes at least two material distribution pipes to output materials through the material distribution pipes. A storage and transportation container, the storage and transportation container including a shielding interlayer, the shielding interlayer including at least two casting cavities, the casting cavities corresponding one-to-one with the material distribution pipe, and the casting cavities being connected to the output end of the material distribution pipe; A vacuum system for applying a vacuum to the mixing system and the storage and transport container.

2. The shielding layer mixing and casting platform for a nuclear storage and transportation container according to claim 1, characterized in that, The mixing system includes: The first premixing and degassing tank is used to stir the first raw material and is connected to the vacuum system. The second premixing and degassing tank is used to stir the second raw material and is connected to the vacuum system. A final mixing tank is disposed below the first premixing and degassing tank and the second premixing and degassing tank. The final mixing tank is connected to the vacuum system. The input end of the final mixing tank is connected to the output end of the first premixing and degassing tank, and the input end of the final mixing tank is connected to the output end of the second premixing and degassing tank. The final mixing tank is used to mix the first raw material and the second raw material to form a material. The output end of the final mixing tank is connected to the input end of the distributor to input the material into the distributor.

3. The shielding layer mixing and casting platform for a nuclear storage and transportation container according to claim 2, characterized in that, The mixing system also includes: A combined cooling and heating unit is provided, which is connected to the first premixing and degassing tank and controls the temperature of the first premixing and degassing tank; the combined cooling and heating unit is connected to the second premixing and degassing tank and controls the temperature of the second premixing and degassing tank; the combined cooling and heating unit is connected to the final mixing tank and controls the temperature of the final mixing tank.

4. The shielding layer mixing and casting platform for a nuclear storage and transportation container according to claim 2, characterized in that, The main platform includes a premixing and degassing operation platform, a final mixing operation platform, and a support platform arranged sequentially from top to bottom; the first premixing and degassing tank and the second premixing and degassing tank are arranged on the premixing and degassing operation platform; the final mixing tank is arranged on the final mixing operation platform; and the vacuum system is arranged on the support platform. The main platform also includes a casting operation platform, which is arranged on one side of the support platform, and the storage and transportation container is installed through the casting operation platform.

5. The shielding layer mixing and casting platform for a nuclear storage and transportation container according to claim 4, characterized in that, The shielding layer mixing and casting platform of the nuclear storage and transportation container also includes: A cleaning fluid storage tank is disposed on the support platform and is detachably connected to the distributor to collect the cleaning fluid flowing out from the distributor.

6. The shielding layer mixing and casting platform for a nuclear storage and transportation container according to claim 1, characterized in that, Two storage and transportation containers are provided. The distributor is located above the storage and transportation containers and can move horizontally to adjust its position relative to the storage and transportation containers. The distributor includes a dispensing pipe that is detachably connected to the storage and transportation containers. The number of the material distribution pipes is not less than the number of the casting cavities in any one of the storage and transportation containers.

7. The shielding layer mixing and casting platform for a nuclear storage and transportation container according to claim 1, characterized in that, The storage and transportation container includes a casting assembly, which comprises: A vacuum port, which is connected to the vacuum system; The pouring gate has its input end connected to the output end of the distribution pipe, and its output end connected to the pouring cavity. A liquid level measuring port is provided, and a liquid level gauge is provided on the liquid level measuring port to detect the liquid level in the storage and transportation container.

8. The shielding layer mixing and casting platform for a nuclear storage and transportation container according to claim 7, characterized in that, The storage and transportation container is located below the distribution pipe, and the material flows from the pouring port into the corresponding pouring cavity through the distribution pipe under the action of gravity.

9. The shielding layer mixing and casting platform for a nuclear storage and transportation container according to claim 7, characterized in that, A sealing top plate is provided on the shielding interlayer, and the casting assembly is arranged on the sealing top plate.

10. A shielding layer mixing and casting platform for a nuclear storage and transportation container according to any one of claims 1 to 9, characterized in that, The shielding layer mixing and casting platform of the nuclear storage and transportation container also includes: The feeding machine is installed on the mixing system; The overhead crane lifts the first and second raw materials from the ground to a preset position on the main platform for loading.

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