An in-line irradiation device

Abstract

The embodiment of the present application discloses an online irradiation device, which comprises a first pipeline, a second pipeline, a target loading and unloading mechanism and a first reversing mechanism; the second pipeline is communicated with a neutron source hole of a reactor; the target loading and unloading mechanism is communicated with the first pipeline and the second pipeline, and is used for conveying a target along the first pipeline and the second pipeline; and the first reversing mechanism is configured to make the first pipeline and the second pipeline selectively communicated with the target loading and unloading mechanism in an operating condition. The online irradiation device of the embodiment of the present application can load and unload the target without stopping the reactor, that is, online irradiation can be realized, and the production efficiency of isotopes is greatly improved.

Description

Technical Field

[0001] This invention relates to the field of nuclear reactor engineering technology, and in particular to an online irradiation device. Background Technology

[0002] In related technologies, the production of isotopes by irradiation in pebble bed high-temperature gas-cooled reactors employs an "offline irradiation" method. A typical procedure is as follows: during reactor shutdown or major overhauls involving opening the pressure vessel top cover, operators manually load pre-packaged targets into fixed irradiation apertures around the reactor core via dedicated channels; after loading, the reactor is resealed and restarted for irradiation; after the irradiation cycle ends, the reactor is shut down again and the pressure vessel is opened, allowing operators to remotely remove the highly radioactive targets from the apertures and transport them to subsequent processing facilities.

[0003] The “offline irradiation” method requires the reactor to be shut down and the main pressure vessel opened for each loading and unloading of the target. This process is time-consuming and forces the reactor to shut down frequently or extend the overhaul time, which greatly reduces the economic efficiency of power generation and isotope production. It makes it impossible to achieve continuous and mass production and seriously restricts the efficiency and economy of pebble bed reactors in isotope production. Summary of the Invention

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

[0005] To this end, embodiments of the present invention propose an online irradiation device, the online irradiation device comprising: a first pipeline; a second pipeline, the second pipeline being connected to the neutron source channel of a reactor; a target loading and unloading mechanism, the target loading and unloading mechanism being connected to the first pipeline and the second pipeline for transporting a target along the first pipeline and the second pipeline; and a first reversing mechanism, the first reversing mechanism being configured to selectively connect the first pipeline and the second pipeline to the target loading and unloading mechanism under operating conditions.

[0006] In the online irradiation apparatus of this invention embodiment, the first reversing mechanism can change the transport path of the target loading and unloading mechanism, so that the target loading and unloading mechanism is only connected to the first pipeline at the same time, thereby allowing new targets to be taken along the first pipeline, or only connected to the second pipeline, thereby allowing new targets to be loaded into the neutron source channel and irradiated targets to be taken out from the neutron source channel.

[0007] Compared to related technologies, this online irradiation device allows for the loading and unloading of targets without stopping the stacking process, thus enabling online irradiation and significantly improving the production efficiency of isotopes.

[0008] In some embodiments, the online irradiation device further includes: a plurality of neutron source pipelines, wherein the plurality of neutron source pipelines correspond one-to-one with and are connected to the neutron source channel; and a second reversing mechanism configured to connect one of the plurality of neutron source pipelines to the second pipeline during operation.

[0009] In some embodiments, the second commutation mechanism includes: a second commutation shell, the second commutation shell having a second inlet and a plurality of second outlets, the second inlet communicating with the second pipeline, and the plurality of second outlets respectively communicating with a plurality of the neutron source pipelines; a second commutation core, the second commutation core being located inside the second commutation shell, the second commutation core having a commutation channel penetrating through itself, one end of the commutation channel communicating with the second inlet; and a second drive assembly, the second drive assembly being disposed in the second commutation shell, the second drive assembly being drively connected to the second commutation core to drive the second commutation core to move within the second commutation shell, so that the other end of the commutation channel communicates with the second outlet.

[0010] In some embodiments, a plurality of second outlets are circumferentially spaced along the second inlet; the second commutator core is rotatably engaged with the second commutator housing; and the second drive assembly is configured to drive the second commutator core to rotate about the axis of the second inlet during operation.

[0011] In some embodiments, the second drive assembly includes: a second servo motor; a second reducer, the input shaft of the second reducer being connected to the output shaft of the second servo motor; and a second magnetic synchronizer, the outer magnetic rotor of the second magnetic synchronizer being connected to the output shaft of the second reducer via a second coupling, and the inner magnetic rotor of the second magnetic synchronizer being connected to the second commutator core.

[0012] In some embodiments, the target loading and unloading mechanism includes: a conveying pipe connected to the first pipeline or the second pipeline; a traction member passing through the conveying pipe and detachably connected to the target; and a traction assembly drivenly connected to the traction member, the traction assembly being configured to retract or release the traction member during operation.

[0013] In some embodiments, the traction assembly includes: a protective housing; a drum located inside the protective housing and rotatably engaged with the protective housing, the traction member being wound around the drum; and a drive member disposed in the protective housing and tractively connected to the drum to drive the drum to rotate about its own axis.

[0014] In some embodiments, the target loading and unloading mechanism further includes a support frame; the delivery pipe extends spirally within the support frame; and the traction assembly is disposed within the support frame.

[0015] In some embodiments, the online irradiation device further includes a target storage mechanism, which includes: a shielding container connected to the first pipeline; and a movable frame for rolling with the ground, on which the shielding container is placed.

[0016] In some embodiments, the online irradiation device further includes a gas replacement mechanism connected to the target loading and unloading mechanism for evacuating the target transport path or filling the target transport path with inert gas. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the online irradiation device according to an embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the second reversing mechanism according to an embodiment of the present invention; Figure 3 yes Figure 2 A sectional view; Figure 4 This is a schematic diagram of the structure of the traction assembly according to an embodiment of the present invention; Figure 5 yes Figure 4 A sectional view; Figure 6 This is a schematic diagram of the conveying pipe according to an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure of the first reversing mechanism according to an embodiment of the present invention; Figure 8 yes Figure 7 A sectional view.

[0019] Figure label: 100, First pipeline; 200, Second pipeline; 300. Target loading and unloading mechanism; 310. Conveying pipe; 320. Traction component; 330. Traction assembly; 340. Support frame; 331. Protective shell; 332. Drum; 333. Drive component; 400. First reversing mechanism; 410. First reversing housing; 420. First reversing core; 430. First drive assembly; 440. Lead screw; 411. First inlet; 412. First outlet; 421. Straight channel; 422. Bent channel; 431. First servo motor; 432. First reducer; 433. First magnetic synchronizer; 434. First coupling; 500. Neutron source pipeline; 600. Second reversing mechanism; 610. Second reversing housing; 620. Second reversing core; 630. Second drive assembly; 611. Second inlet; 612. Second outlet; 621. Reversing channel; 631. Second servo motor; 632. Second reducer; 633. Second magnetic synchronizer; 634. Second coupling; 700. Target storage mechanism; 710. Shielding container; 720. Mobile frame. Detailed Implementation

[0020] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0021] like Figure 1 As shown, the online irradiation device of this embodiment includes a first pipeline 100, a second pipeline 200, a target loading and unloading mechanism 300, and a first reversing mechanism 400; the second pipeline 200 is connected to the neutron source channel of the reactor; the target loading and unloading mechanism 300 is connected to the first pipeline 100 and the second pipeline 200 for transporting the target along the first pipeline 100 and the second pipeline 200; the first reversing mechanism 400 is configured to selectively connect the first pipeline 100 and the second pipeline 200 to the target loading and unloading mechanism 300 during operation.

[0022] In the online irradiation apparatus of this embodiment, the first reversing mechanism 400 can change the transport path of the target loading and unloading mechanism 300, so that the target loading and unloading mechanism 300 is only connected to the first pipeline 100 at the same time, thereby allowing new targets to be taken along the first pipeline 100, or only connected to the second pipeline 200, thereby allowing new targets to be loaded into the neutron source channel and targets to be taken out from the neutron source channel after irradiation.

[0023] Compared to related technologies, this online irradiation device allows for the loading and unloading of targets without stopping the stacking process, thus enabling online irradiation and significantly improving the production efficiency of isotopes.

[0024] The following combination Figures 1 to 8 The structure and shape of the online irradiation device according to an embodiment of the present invention will be described in detail below: In some embodiments, reference is made to Figure 1 The online irradiation device also includes: a neutron source pipeline 500 and a second reversing mechanism 600; there are multiple neutron source pipelines 500, and each of the multiple neutron source pipelines 500 corresponds to and is connected to a neutron source channel; the second reversing mechanism 600 is configured to connect one of the multiple neutron source pipelines 500 to the second pipeline 200 during operation.

[0025] Specifically, corresponding to the neutron source channels, there are three neutron source pipes 500, which are connected to the three neutron source channels respectively; the second reversing mechanism 600 enables the second pipe 200 to be connected to only one of the neutron source pipes 500 at the same time, that is, the target loading and unloading mechanism 300 is connected to only one of the neutron source channels at the same time, so that new targets can be loaded into the neutron source channel or targets after irradiation can be unloaded.

[0026] By setting a second reversing mechanism 600 that works in conjunction with the neutron source channels, the target loading and unloading mechanism 300 can load and unload targets into different neutron source channels, enabling the reactor core to irradiate multiple targets simultaneously, thus achieving continuous and batch production of isotopes and improving the efficiency and economy of pebble bed reactors in isotope production.

[0027] In some embodiments, reference is made to Figure 2 and Figure 3 The second commutation mechanism 600 includes: a second commutation shell 610, a second commutation core 620, and a second drive assembly 630; the second commutation shell 610 is provided with a second inlet 611 and a plurality of second outlets 612, the second inlet 611 is connected to the second pipeline 200, and the plurality of second outlets 612 are respectively connected to a plurality of neutron source pipelines 500; the second commutation core 620 is located inside the second commutation shell 610, and the second commutation core 620 is provided with a commutation channel 621 penetrating through itself, one end of the commutation channel 621 being connected to the second inlet 611; the second drive assembly 630 is disposed in the second commutation shell 610, and the second drive assembly 630 is drively connected to the second commutation core 620 to drive the second commutation core 620 to move within the second commutation shell 610, so that the other end of the commutation channel 621 is connected to the second outlet 612.

[0028] For details, please refer to [link / reference]. Figure 2 and Figure 3 Corresponding to the neutron source pipeline 500, there are three second outlets 612, which are respectively connected to three neutron source pipelines 500. When the second commutation core 620 moves in the second commutation shell 610 under the drive of the second drive assembly 630, one end of the commutation channel 621 is always connected to the second inlet 611, and the other end of the commutation channel 621 changes position with the movement and is connected to different second outlets 612, so that the second pipeline 200 is connected to different neutron source channels, thereby realizing the connection between the target loading and unloading mechanism 300 and different neutron source channels.

[0029] In some embodiments, reference is made to Figure 3 Multiple second outlets 612 are distributed circumferentially along the second inlet 611; the second commutator 620 is rotatably engaged with the second commutator housing 610; the second drive assembly 630 is configured to drive the second commutator 620 to rotate around the axis of the second inlet 611 under operating conditions.

[0030] For details, please refer to [link / reference]. Figure 3 The second reversing shell 610 is a cylindrical shell with a second inlet 611 at its top and three second outlets 612 evenly distributed along the side wall of the second reversing shell 610. The second reversing core 620 is a cylinder with a reversing channel 621 that is a bent channel with a smooth transition at the bend. The upper end of the reversing channel 621 is located on the top surface of the second reversing core 620, directly opposite the second inlet 611, and the lower end of the reversing channel 621 is located on the side of the second reversing core 620. As the second reversing core 620 rotates, it is directly opposite different second outlets 612.

[0031] When the second drive assembly 630 is activated, the second commutation core 620 rotates around its own axis, connecting the commutation channel 621 with one of the second outlets 612. When switching the neutron source pipeline 500 is required, the second drive assembly 630 drives the second commutation core 620 to rotate 120°, connecting the commutation channel 621 with the other second outlet 612. With this design, switching the neutron source pipeline 500 is simple, and the target can smoothly pass through the second commutation mechanism 600 to enter the neutron source pipeline 500 from the second pipeline 200 or vice versa.

[0032] In some embodiments, reference is made to Figure 2 The second drive assembly 630 includes: a second servo motor 631, a second reducer 632, and a second magnetic synchronizer 633; ​​the input shaft of the second reducer 632 is connected to the output shaft of the second servo motor 631; the second magnetic synchronizer 633 is bolted to the second commutator housing 610, the outer magnetic rotor of the second magnetic synchronizer 633 is connected to the output shaft of the second reducer 632 through the second coupling 634, and the inner magnetic rotor of the second magnetic synchronizer 633 is connected to the second commutator core 620.

[0033] Through the cooperation of the second servo motor 631, the second reducer 632, the second coupling 634, and the second magnetic synchronizer 633, the torque of the second servo motor 631 can be transmitted to the second commutator 620, causing the second commutator 620 to rotate and realizing the connection between the second pipeline 200 and different neutron source pipelines 500. Furthermore, the cooperation of the second servo motor 631, the second reducer 632, the second coupling 634, and the second magnetic synchronizer 633 here can achieve contactless sealed transmission, thereby effectively avoiding the risk of radioactive leakage at the second commutator 600; it can also achieve high-precision control of the second commutator 620, ensuring the effectiveness of the rotation of the second commutator 620.

[0034] In some embodiments, reference is made to Figures 4 to 6The target loading and unloading mechanism 300 includes: a conveying pipe 310, a traction member 320, and a traction assembly 330; the conveying pipe 310 is connected to a first pipeline 100 or a second pipeline 200; the traction member 320 passes through the conveying pipe 310 and is used for detachable connection with the target; the traction assembly 330 is drive-connected to the traction member 320 and is configured to retract or release the traction member 320 during operation.

[0035] For details, please refer to [link / reference]. Figures 4 to 6 and combined Figure 1 As shown, the target loading and unloading mechanism 300 also includes a support frame 340, and the conveying pipe 310 and the traction assembly 330 are both fixed to the support frame 340. The conveying pipe 310 extends in a spiral shape, with one end connected to the traction assembly 330 and the other end connected to the first reversing assembly. Here, the conveying pipe 310 is designed in a spiral shape, which can increase the conveying path of the target in the conveying pipe 310 and effectively reduce the average axial speed of the target, thereby maintaining a relatively stable and controllable conveying speed of the target and ensuring the stability of the target during the conveying process. The traction component 320 uses a steel wire rope, which can withstand repeated bending and straightening, thus adapting to the spiral conveying pipe 310 and driving the target to move under the drive of the traction assembly 330.

[0036] In some embodiments, reference is made to Figure 5 The traction assembly 330 includes: a protective shell 331, a drum 332, and a drive member 333; the drum 332 is located inside the protective shell 331 and is rotatably engaged with the protective shell 331, and the traction member 320 is wound around the drum 332; the drive member 333 is disposed in the protective shell 331 and is connected to the drum 332 in a transmission manner to drive the drum 332 to rotate around its own axis.

[0037] Specifically, in combination Figure 5 and Figure 6 As shown, the side wall of the drum 332 is provided with a through hole, which is connected to the upper end of the conveying pipe 310; the wire rope is wound around the drum 332, and one end of it is fixed to the drum 332, while the other end passes through the through hole and enters the conveying pipe 310; both ends of the drum 332 are rotatably engaged with the protective shell 331 through bearings; the drive unit 333 consists of a servo motor, a reducer, a coupling and a magnetic synchronizer, and the inner magnetic rotor of the magnetic synchronizer is connected to the drum 332.

[0038] When the servo motor starts, the torque is transmitted sequentially to the drum 332 via the reducer, coupling, and magnetic synchronizer. The drum 332 rotates around its own axis, releasing or retracting the wire rope, thereby lowering or lifting the target. It should be noted that the drive unit 333, composed of a servo motor, reducer, coupling, and magnetic synchronizer, enables contactless, sealed transmission, effectively avoiding the risk of radioactive leakage at the target loading / unloading mechanism 300. Furthermore, it allows for high-precision control of the drum 332, ensuring the target is delivered to its designated position.

[0039] In some embodiments, reference is made to Figure 1 The online irradiation device also includes a target storage mechanism 700, which includes a shielding container 710 and a movable frame 720. The shielding container 710 is connected to the first pipeline 100. The movable frame 720 is used to roll with the ground, and the shielding container 710 is placed on the movable frame 720.

[0040] The movable frame 720 supports the shielding container 710 and can move the shielding container 710 to a suitable position. The shielding container 710 is used to store the target after irradiation and can prevent radioactive leakage.

[0041] In some embodiments, the online irradiation apparatus further includes a gas replacement mechanism connected to the target loading and unloading mechanism 300 for evacuating the target transport path or filling the target transport path with inert gas.

[0042] For details, please refer to Figure 1 The delivery pipe 310, the second pipe 200, and the neutron source pipe 500 form a channel leading from the outside of the reactor to the reactor core. The gas replacement mechanism is connected to the non-spiral lower section of the delivery pipe 310. The channel can be evacuated through the delivery pipe 310, and an inert gas, such as helium, can be introduced into the evacuated channel to replace the air. This design creates an inert environment within the channel, establishing a "safety barrier." Thus, when the isolation valve of the neutron source pipe 500 is opened, i.e., when the channel is connected to the primary loop, the mixing of oxygen with graphite dust and hydrogen in the primary loop can be avoided, thereby preventing the risk of combustion or explosion. It should be noted that the gas replacement mechanism is an existing structure, and therefore will not be described in detail here.

[0043] In some embodiments, reference is made to Figure 7 and Figure 8The first commutation mechanism 400 includes a first commutation housing 410, a first commutation core 420, and a first drive assembly 430. The top of the side wall of the first commutation housing 410 is provided with a first inlet 411, and the bottom of the side wall is provided with two spaced-apart first outlets 412. The first commutation core 420 is located inside the first commutation housing 410 and slides with the first commutation housing 410. The first commutation core 420 is provided with straight channels 421 and curved channels 422 that penetrate through it and are spaced-apart. The bends of the curved channels 422 are smoothly transitioned. The first drive assembly 430 includes a first servo motor 431, a first reducer 432, and a first magnetic synchronizer 433; the input shaft of the first reducer 432 is connected to the output shaft of the first servo motor 431; the first magnetic synchronizer 433 is bolted to the first commutator housing 410, the outer magnetic rotor of the first magnetic synchronizer 433 is connected to the output shaft of the first reducer 432 through the first coupling 434, and the inner magnetic rotor of the first magnetic synchronizer 433 is threadedly connected to a lead screw 440, with one end of the lead screw 440 away from the first magnetic synchronizer 433 located at the first commutator core 420.

[0044] by Figure 8 For example, when the first servo motor 431 starts, the torque will be transmitted to the lead screw 440 through the first reducer 432, the first coupling 434 and the first magnetic synchronizer 433 in sequence. Under the restriction of the first reversing core 420, the lead screw 440 cannot rotate, so it moves along its own axis and drives the first reversing core 420 to slide. In this way, the straight channel 421 will move to its two ends and connect with the first inlet 411 and one of the first outlets 412 respectively, or the curved channel 422 will move to its two ends and connect with the first inlet 411 and the other first outlet 412 respectively. This will correspondingly connect the conveying pipe 310 with the second pipe 200 or the conveying pipe 310 with the first pipe 100, thereby realizing the switching of the conveying path of the target loading and unloading mechanism 300.

[0045] In addition, the first servo motor 431, the first reducer 432, the first coupling 434 and the first magnetic synchronizer 433 work together to achieve contactless sealed transmission, thereby effectively avoiding the risk of radioactive leakage at the first commutation mechanism 400; it can also achieve high-precision control of the first commutation core 420 to ensure that the first commutation core 420 slides into place.

[0046] refer to Figures 1 to 8 The working process of the online irradiation device provided in this embodiment is as follows: S1, Loading a new target (before loading the new target, the states of each structure of the online irradiation device are as follows: the isolation valve of the first pipeline 100 is in the open state, the isolation valves of the second pipeline 200 and the neutron source pipeline 500 are in the closed state, and the pipeline between the target loading and unloading mechanism 300 and the second reversing mechanism 600 is in an atmospheric pressure air atmosphere): S101, move the first reversing core 420 of the first reversing mechanism 400 to the bend 422 and connect it to the first pipeline 100, start the traction assembly 330, release the wire rope until the wire rope is above the shielding tank 710, then connect the wire rope to the new target, start the traction assembly 330 again, and retract the wire rope until the new target is inside the delivery pipe 310; S102, close the isolation valve of the first pipeline 100, open the isolation valve of the second pipeline 200, move the first reversing core 420 of the first reversing mechanism 400 to the straight channel 421 to connect with the second pipeline 200, start the gas replacement mechanism, evacuate the delivery pipe 310 and the second pipeline 200 until the vacuum degree reaches 500Pa, then fill the delivery pipe 310 and the second pipeline 200 with helium, and continue to fill the helium until the gas pressure reaches 7MPa; S103, connect the reversing channel 621 of the second reversing mechanism 600 to the target neutron source pipeline 500, and open the isolation valve of the target neutron source pipeline 500. S104, start the traction assembly 330, release the wire rope to the neutron source channel where the new target is installed in the reactor core, then disconnect the wire rope from the new target, start the traction assembly 330 again, and retract the wire rope to the initial position, i.e., inside the delivery pipe 310. S105, close the isolation valve of the target neutron source pipeline 500, start the gas replacement mechanism, and evacuate the delivery pipe 310 and the second pipeline 200 until the gas pressure is normal. S2, Remove the target after irradiation (before the target is removed from the core, the status of each structure of the online irradiation device is as follows: the isolation valve of the first pipeline 100 and the isolation valve of the neutron source pipeline 500 are both closed, and the air pressure in the pipeline between the target loading and unloading mechanism 300 and the second reversing mechanism 600 is at atmospheric pressure). S201, start the gas replacement mechanism to evacuate the delivery pipe 310 and the second pipe 200 until the vacuum degree reaches 500Pa, then fill the delivery pipe 310 and the second pipe 200 with helium and continue to fill the helium until the gas pressure reaches 7MPa. S202, connect the reversing channel 621 of the second reversing mechanism 600 to the target neutron source pipeline 500, and open the isolation valve of the target neutron source pipeline 500. S203, start the traction assembly 330, release the wire rope to the reactor core, then connect the wire rope to the target after the reactor core is exposed, start the traction assembly 330 again, and retract the wire rope until the target is located in the delivery pipe 310. S204, close the isolation valve of the target neutron source pipeline 500, start the gas replacement mechanism, evacuate the delivery pipeline 310 and the second pipeline 200 until the vacuum degree reaches 500Pa, and then open the vent valve of the first pipeline 100 to switch the atmosphere in the first pipeline 100, the second pipeline 200 and the delivery pipeline 310 to air atmosphere. S205, close the vent valve, open the isolation valve of the first pipeline 100, move the first reversing core 420 of the first reversing mechanism 400 to the bend 422 to connect with the first pipeline 100, start the traction assembly 330, release the wire rope to the target above the shielding tank 710, then disassemble the target into sections and store it in the shielding tank 710.

[0047] It should be noted that the isolation valve mentioned above is used to control the opening and closing of the pipeline, and the switching valve is used to control the connection and isolation between the pipeline and the external environment; the detachable connection between the wire rope and the target is achieved by the existing structure, and the segmented disassembly of the target is achieved by the existing target disassembly robot.

[0048] The online irradiation device provided in this implementation can safely and reliably load and unload targets into and out of the reactor core, providing effective support and guarantee for isotope production in pebble bed type high-temperature gas-cooled reactors, and can significantly improve the production efficiency of isotopes.

[0049] In the description of this invention, 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," "axial," "radial," and "circumferential" 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 invention 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 invention.

[0050] 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0051] In this invention, unless otherwise explicitly 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 part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0054] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. An online irradiation device, characterized in that, include: First pipeline (100); The second pipeline (200) is connected to the neutron source channel of the reactor; A target loading and unloading mechanism (300) is connected to the first pipeline (100) and the second pipeline (200) for conveying a target along the first pipeline (100) and the second pipeline (200); A first reversing mechanism (400) is configured to connect either the first pipeline (100) or the second pipeline (200) to the target loading and unloading mechanism (300) during operation.

2. The online irradiation device according to claim 1, characterized in that, The online irradiation device also includes: Neutron source pipeline (500), wherein there are multiple neutron source pipelines (500), and each of the multiple neutron source pipelines (500) corresponds to and is connected to the neutron source channel; A second reversing mechanism (600) is configured to connect one of the plurality of neutron source lines (500) to the second line (200) during operation.

3. The online irradiation device according to claim 2, characterized in that, The second reversing mechanism (600) includes: The second reversing shell (610) is provided with a second inlet (611) and a plurality of second outlets (612). The second inlet (611) is connected to the second pipeline (200), and the plurality of second outlets (612) are respectively connected to the plurality of neutron source pipelines (500). The second commutator (620) is located inside the second commutator housing (610). The second commutator (620) is provided with a commutator channel (621) that penetrates it. One end of the commutator channel (621) is connected to the second inlet (611). The second drive assembly (630) is disposed in the second commutator housing (610) and is connected to the second commutator core (620) to drive the second commutator core (620) to move within the second commutator housing (610) so that the other end of the commutator channel (621) is connected to the second outlet (612).

4. The online irradiation device according to claim 3, characterized in that, Multiple second outlets (612) are distributed circumferentially at intervals along the second inlet (611); The second commutator core (620) is rotatably engaged with the second commutator housing (610); The second drive assembly (630) is configured to drive the second commutator (620) to rotate about the axis of the second inlet (611) during operation.

5. The online irradiation device according to claim 4, characterized in that, The second drive component (630) includes: Second servo motor (631); The second reducer (632) has its input shaft connected to the output shaft of the second servo motor (631); The second magnetic synchronizer (633) has its outer magnetic rotor connected to the output shaft of the second reducer (632) via a second coupling (634), and its inner magnetic rotor connected to the second commutator core (620).

6. The online irradiation device according to claim 1, characterized in that, The target loading and unloading mechanism (300) includes: A delivery pipe (310) is connected to the first pipeline (100) or the second pipeline (200); A traction member (320) is provided through the delivery pipe (310) and is used for detachable connection with the target. A traction assembly (330) is drive-connected to the traction member (320), and the traction assembly (330) is configured to retract or release the traction member (320) during operation.

7. The online irradiation device according to claim 6, characterized in that, The traction assembly (330) includes: Protective shell (331); A drum (332) is located inside the protective shell (331) and is rotatably engaged with the protective shell (331), and the traction member (320) is wound around the drum (332); A drive member (333) is disposed on the protective shell (331) and is connected to the drum (332) for driving the drum (332) to rotate around its own axis.

8. The online irradiation device according to claim 6, characterized in that, The target loading and unloading mechanism (300) also includes a support frame (340); The delivery pipe (310) extends in a spiral shape within the support frame (340); The traction assembly (330) is disposed on the support frame (340).

9. The online irradiation device according to claim 1, characterized in that, The online irradiation device further includes a target storage mechanism (700), which comprises: A shielding container (710) is connected to the first pipeline (100); A movable frame (720) is used to roll with the ground, and the shielding tank (710) is placed on the movable frame (720).

10. The online irradiation device according to claim 1, characterized in that, The online irradiation device also includes a gas replacement mechanism, which is connected to the target loading and unloading mechanism (300) for evacuating the transport path of the target or filling the transport path of the target with inert gas.

Images