Spherical fuel element lifting device and lifting method

Abstract

The invention discloses a spherical fuel element lifting device and method.The spherical fuel element lifting device comprises a lifting shell, a lifting body, a detection assembly and a control assembly, and the lifting shell is provided with a spherical fuel element inlet, a spherical fuel element outlet and a spherical fuel element lifting channel; the spherical fuel element inlet and the spherical fuel element outlet are both communicated with the spherical fuel element lifting channel, and a plurality of electromagnetic coils are arranged on the lifting shell in the vertical direction of the lifting shell; the lifting body is movably arranged in a lifting channel of the spherical fuel element; the detection assembly is arranged on the lifting shell and can detect the position of the spherical fuel element; all the electromagnetic coils and the detection assembly are connected with the control assembly. According to the lifting device for the spherical fuel element, the lifting body is lifted by sequentially electrifying the electromagnetic coils, so that the spherical fuel element is driven to be lifted, the lifting efficiency of the spherical fuel element is improved, and collision between the spherical fuel element and the lifting shell can be reduced.

Description

Technical Field

[0001] The present application relates to the technical field of pebble bed high temperature gas-cooled reactors, and more specifically, to a spherical fuel element lifting device and lifting method. Background Art

[0002] The pebble bed high temperature gas-cooled reactor implements non-stop fuel replacement, and a large number of spherical fuel elements are unloaded from the core. After fuel consumption measurement, they are reloaded into the core. In the existing technology, the circulation of spherical fuel elements requires compressed helium to provide a pneumatic conveying power source, and a maximum of three fuel elements can be lifted at a time. The relevant pneumatic conveying cycle is not an independent loop. There is airflow exchange with a loop at the top and bottom of the pile, and flow blocking devices are set at the top and bottom of the pile. The pneumatic conveying system is relatively complex and expensive, and the high ball speed can easily cause wear of the spherical fuel elements and generate dust. The transportation of spherical fuel elements by pneumatic conveying has the problems of low lifting efficiency of spherical fuel elements and easy breakage of spherical fuel elements.

[0003] Therefore, how to improve the lifting efficiency of spherical fuel elements without using pneumatic conveying has become a technical problem that needs to be solved urgently by those skilled in the art. Summary of the Invention

[0004] In view of this, the purpose of the present application is to provide a spherical fuel element lifting device to improve the lifting efficiency of the spherical fuel elements.

[0005] Another core of the present application is to provide a method for lifting a spherical fuel element, using the above-mentioned spherical fuel element lifting device.

[0006] To achieve the above objectives, this application provides the following technical solutions:

[0007] A spherical fuel element lifting device, comprising:

[0008] A lifting shell is provided with a spherical fuel element inlet, a spherical fuel element outlet and a spherical fuel element lifting channel, the spherical fuel element inlet and the spherical fuel element outlet are both connected to the spherical fuel element lifting channel, and a plurality of electromagnetic coils are provided on the lifting shell along the vertical direction of the lifting shell;

[0009] a lifting body, the lifting body being movably disposed in the spherical fuel element lifting passage, the lifting body having a supporting groove capable of supporting the spherical fuel element, the lifting body containing a ferromagnetic material or being made of a ferromagnetic material, and being capable of attracting the lifting body to move toward the electromagnetic coil when the electromagnetic coil is energized;

[0010] a detection assembly, the detection assembly being disposed on the lifting shell and capable of detecting the position of the spherical fuel element;

[0011] A control component, each of the electromagnetic coils and the detection component is connected to the control component.

[0012] Optionally, in the above-mentioned spherical fuel element lifting device, the lifting body includes a first lifting portion and a second lifting portion connected to each other, and the supporting groove is provided on the first lifting portion;

[0013] The ferromagnetic material is arranged on

[0014] On at least one of the first lifting portion and the second lifting portion, a buffer structure is provided between the first lifting portion and the second lifting portion.

[0015] Optionally, in the above-mentioned spherical fuel element lifting device, the buffer structure includes at least one of a spring, a rubber elastic member, or a metal spring.

[0016] Optionally, in the above-mentioned spherical fuel element lifting device, the first lifting part and the second lifting part are provided with interconnected debris and dust holes, and the bottom of the lifting shell is provided with a debris and dust collection assembly.

[0017] Optionally, in the above-mentioned spherical fuel element lifting device, the lifting body includes a plurality of lifting part assemblies connected to each other in series, and the lifting part assembly includes the first lifting part and the second lifting part connected to each other.

[0018] Optionally, in the above-mentioned spherical fuel element lifting device, the lifting shell includes a base and a lifting shell body, and the lifting shell body and the base are detachably connected;

[0019] The spherical fuel element inlet, the spherical fuel element outlet and the spherical fuel element lifting channel are all arranged on the lifting shell body. The spherical fuel element inlet is arranged at the bottom of the lifting shell body and is arranged obliquely with respect to the lifting shell body. The spherical fuel element outlet is arranged at the top of the lifting shell body and is arranged as a curved pipe structure.

[0020] Optionally, in the above-mentioned spherical fuel element lifting device, the inner diameter of the lifting shell is larger than the outer diameter of the lifting body.

[0021] Optionally, in the above-mentioned spherical fuel element lifting device, a slide rail is provided on the lifting shell, and a slider or a pulley that slides with the slide rail is provided on the lifting body.

[0022] A method for lifting a spherical fuel element, using the above-mentioned spherical fuel element lifting device, comprises the following steps:

[0023] The spherical fuel element enters the spherical fuel element lifting channel and falls onto the lifting body;

[0024] To lift the spherical fuel element, each electromagnetic coil is energized in sequence along the vertical direction of the lifting shell to lift the lifting body, which drives the spherical fuel element to rise until the spherical fuel element is discharged from the spherical fuel element outlet.

[0025] Optionally, in the above-mentioned spherical fuel element lifting method, the step of lifting the spherical fuel element specifically includes: the detection component detects the position of the spherical fuel element in the spherical fuel element lifting channel, and feeds back to the control component, and the control component controls the corresponding electromagnetic coil to turn on and off power to lift the lifting body.

[0026] It can be seen from the above scheme that the spherical fuel element lifting device disclosed in the present application places the spherical fuel element on the supporting groove of the lifting body. By energizing each electromagnetic coil in turn, the lifting body is lifted, and the lifting body drives the spherical fuel element to lift, which can improve the lifting efficiency of the spherical fuel element and reduce the collision between the spherical fuel element and the lifting shell, thereby reducing the risk of the spherical fuel element being broken. At the same time, the device can reduce the lifting speed of the spherical fuel element and reduce the amount of dust; the device has a simple structure and is easy to implement. Compared with complex pneumatic conveying systems, it can reduce the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0028] Figure 1 This is a schematic structural diagram of the spherical fuel element lifting device disclosed in an embodiment of the present application;

[0029] Figure 2 This is a flow chart of the method for providing a spherical fuel element disclosed in an embodiment of the present application.

[0030] Among them, 10 is a lifting shell, 101 is a base, 102 is a lifting shell body, 11 is a spherical fuel element inlet, 12 is a spherical fuel element outlet, and 13 is a spherical fuel element lifting channel;

[0031] 20 is a lifting body, 201 is a supporting groove, 21 is a first lifting part, and 22 is a second lifting part;

[0032] 30 is a spherical fuel element;

[0033] 40 is an electromagnetic coil;

[0034] 50 is a detection component. DETAILED DESCRIPTION

[0035] The core of this application is to disclose a spherical fuel element lifting device to improve the lifting efficiency of the spherical fuel elements.

[0036] Another core of the present application is to disclose a method for lifting a spherical fuel element, using the above-mentioned spherical fuel element lifting device.

[0037] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0038] like Figure 1 As shown, an embodiment of the present application discloses a spherical fuel element lifting device, including a lifting shell 10, a lifting body 20, a detection assembly 50 and a control assembly.

[0039] The lifting shell 10 is provided with a spherical fuel element inlet 11, a spherical fuel element outlet 12, and a spherical fuel element lifting passage 13. The spherical fuel element inlet 11 and the spherical fuel element outlet 12 are both connected to the spherical fuel element lifting passage 13. A plurality of electromagnetic coils 40 are provided on the lifting shell 10 along the vertical direction of the lifting shell 10. Preferably, each electromagnetic coil 40 is wound around an iron core provided on the lifting shell 10. In order to reduce the impact of radiation from the spherical fuel elements 30 on the electromagnetic coils 40, a shielding structure is provided between the electromagnetic coils 40 and the lifting shell 10.

[0040] The lifting body 20 is movably disposed within the spherical fuel element lifting passage 13. The lifting body 20 has a supporting groove 201 capable of supporting the spherical fuel element 30. The lifting body 20 can lift one or more spherical fuel elements 30 at a time. The figure shows three spherical fuel elements 30. The figure is only an example and is not intended to be limiting. The number of spherical fuel elements 30 can be one, two, four, or more. The lifting body 20 contains a ferromagnetic material or is made of a ferromagnetic material, preferably a ferromagnetic material. The detection assembly 50 is disposed on the lifting shell 10 and is capable of detecting the position of the spherical fuel element 30. Preferably, the inner diameter of the spherical fuel element lifting passage 13 is larger than the inner diameter of the spherical fuel element 30.

[0041] The spherical fuel elements 30 unloaded from the core enter the spherical fuel element lifting channel 13 through the spherical fuel element inlet 11 and fall onto the supporting groove 201 of the lifting body 20. Since the lifting body 20 contains ferromagnetic material, when any of the electromagnetic coils 40 is energized, the magnetic field generated by the energized electromagnetic coil 40 can attract the lifting body 20, causing the lifting body 20 to move toward a position close to the energized electromagnetic coil 40. The lifting body 20 carries the spherical fuel elements 30 and moves along the vertical direction of the lifting shell 10. Along the vertical direction of the lifting shell 10, each electromagnetic coil 40 is energized in turn from bottom to top, which can enable the lifting body 20 to move along the vertical direction of the lifting shell 10, thereby realizing the lifting of the spherical fuel elements 30. The spherical fuel elements 30 are discharged from the spherical fuel element outlet 12 and sent to the core.

[0042] In the spherical fuel element lifting device disclosed in the embodiment of the present application, the spherical fuel element 30 is placed on the supporting groove 201 of the lifting body 20. By energizing each electromagnetic coil 40 in sequence, the lifting body 20 is lifted, and the lifting body 20 drives the spherical fuel element 30 to be lifted, which can improve the lifting efficiency of the spherical fuel element 30 and reduce the collision between the spherical fuel element 30 and the lifting shell 10, thereby reducing the risk of the spherical fuel element 30 being broken; the device has a simple structure and is easy to implement. Compared with complex pneumatic conveying systems, it can reduce the cost; at the same time, the device can reduce the lifting speed of the spherical fuel element and reduce the amount of dust.

[0043] Furthermore, in order to prevent the spherical fuel element 30 from being discharged from the spherical fuel element inlet 11 during the lifting process, an opening and closing assembly is provided on the spherical fuel element inlet 11. When the spherical fuel element 30 needs to enter the spherical fuel element lifting passage 13 from the spherical fuel element inlet 11, the opening and closing assembly is in an open state, and the spherical fuel element inlet 11 is connected to the spherical fuel element lifting passage 13; when the spherical fuel element 30 needs to be lifted, the opening and closing assembly is in a closed state, and the spherical fuel element inlet 11 is disconnected from the spherical fuel element lifting passage 13.

[0044] Specifically, the opening and closing component can be a valve, which is connected to the control component; or the opening and closing component can include a connecting plate and a limiting member that are hingedly connected to the inner walls on both sides of the spherical fuel element inlet 11 through elastic reset members. When the spherical fuel element 30 enters the spherical fuel element inlet 11, the connecting plate can be pushed open to enter the spherical fuel element lifting channel 13. After each spherical fuel element 30 passes through in turn, the connecting plate is reset under the action of the elastic reset member. The setting of the limiting member can make the connecting plate open only in the direction of the spherical fuel element lifting channel 13, which can prevent the spherical fuel element 30 from being discharged from the spherical fuel element inlet 11 during the lifting process.

[0045] Furthermore, the detection assembly 50 is preferably a position sensor, configured to detect the position of the spherical fuel element 30 in real time and transmit the information to the control assembly. The control assembly then determines the position of the electromagnetic coil 40 that requires energization based on the position of the spherical fuel element 30 and transmits the signal to the corresponding electromagnetic coil 40, thereby energizing the corresponding electromagnetic coil 40. Specifically, the detection assembly 50 may be an ultrasonic sensor, an ultrasonic position sensor, or another type of position sensor, preferably located outside the lifting hull 10. To improve detection accuracy, the detection assembly 50 may include multiple position sensors, each of which is connected to the control assembly.

[0046] Furthermore, if Figure 1 As shown, the lifting body 20 includes a first lifting portion 21 and a second lifting portion 22 connected to each other. A support groove 201 is provided on the first lifting portion 21. The support groove 201 is preferably arc-shaped, matching the curved surface of the spherical fuel element 30 to better support the spherical fuel element 30 and reduce the risk of collision. A ferromagnetic material is provided on at least one of the first lifting portion 21 and the second lifting portion 22. Specifically, the first lifting portion 21 or the second lifting portion 22 is made of ferromagnetic material. When the electromagnetic coil 40 is energized, it can attract one of the first lifting portion 21 or the second lifting portion 22 to move, thereby driving the other to move synchronously. Of course, both the first lifting portion 21 and the second lifting portion 22 can be made of ferromagnetic material. In some specific embodiments, the second lifting portion 22 is made of a ferromagnetic material (e.g., iron) and the first lifting portion 21 is made of a resin material. The use of a resin material can reduce the weight of the lifting body 20, absorb vibration and impact energy, and be corrosion-resistant.

[0047] A buffer structure is provided between the first lifting part 21 and the second lifting part 22. When the spherical fuel element 30 falls onto the lifting body 20, the buffer structure can play a shock-absorbing role, reduce the risk of the lifting body 20 breaking or deforming, extend the service life of the lifting body 20, and ensure the normal operation of the spherical fuel element lifting device.

[0048] It should be noted that, in some specific embodiments, the lifting body 20 may also be an integrated structure.

[0049] Furthermore, the first lifting portion 21 and the second lifting portion 22 are connected by a buffer structure, or the first lifting portion 21 and the second lifting portion 22 are connected by a snap connection. The buffer structure includes at least one of a spring, a rubber elastic member (such as a rubber block, a rubber pad), or a metal spring.

[0050] Specifically, the buffer structure is preferably a spring, and the first lifting part 21 and the second lifting part 22 can be connected by a spring. Alternatively, a slot is provided on one of the first lifting part 21 and the second lifting part 22, and a buckle that cooperates with the slot is provided on the other. The spring is provided in the slot. When installed, the buckle squeezes the spring, so that the spring is in a compressed state and engages with the slot. Or as Figure 1 As shown in FIG, the first lifting portion 21 has a T-shaped structure, with the plug-in portion being the T-shaped portion of the T-shaped structure. The second lifting portion 22 is disc-shaped. The T-shaped portion of the first lifting portion 21 is inserted into the socket of the second lifting portion 22 and is exposed therefrom. A spring is disposed between the first lifting portion 21 and the second lifting portion 22. When the second lifting portion 22 is made of ferromagnetic material, the electromagnetic coil 40 is energized, attracting the second lifting portion 22, causing the second lifting portion 22 to move toward the electromagnetic coil 40, driving the first lifting portion 21 with it. The T-shaped structure of the first lifting portion 21 can reduce left and right movement during the lifting process.

[0051] Furthermore, in order to collect debris and dust generated by the collision of the spherical fuel element 30, the first lifting part 21 and the second lifting part 22 are provided with connected debris and dust holes, and the bottom of the lifting shell 10 is provided with a debris and dust collection assembly. Preferably, the debris and dust collection assembly is detachably connected to the lifting shell 10 to facilitate removal and replacement.

[0052] It should be noted that the inclusion of the interconnected first and second lifting sections 21, 22 in the lifting body 20 is merely illustrative. In some specific embodiments, the lifting body 20 may include multiple lifting section assemblies connected in series, each comprising the interconnected first and second lifting sections 21, 22. The provision of multiple lifting section assemblies can increase the length of the lifting body 20 (here, the length along the axis of the spherical fuel element lifting passage 13), reduce the spacing between any two adjacent electromagnetic coils 40, and improve lifting stability. The specific number of lifting section assemblies provided can be determined based on actual needs.

[0053] Furthermore, if Figure 1As shown, the lifting shell 10 includes a base 101 and a lifting shell body 102. The lifting shell body 102 and the base 101 are detachably connected, preferably by bolts, for easy disassembly. The lifting body 20 can be removed and replaced by disassembly. To ensure the stability and secureness of the connection between the base 101 and the lifting shell body 102, an anti-loosening device is provided. Specifically, the anti-loosening device may include a connector that connects the bolts in series. The base 101 and the lifting shell body 102 are preferably made of a material capable of bearing pressure. The spherical fuel element inlet 11, the spherical fuel element outlet 12, and the spherical fuel element lifting channel 13 are all provided on the lifting shell body 102. The spherical fuel element inlet 11 is located at the bottom of the lifting shell body 102 and is arranged at an angle relative to the lifting shell body 102. The spherical fuel element outlet 12 is located at the top of the lifting shell body 102 and is configured as a curved pipe structure. Specifically, the ball receiving port of the spherical fuel element inlet 11 opens upward, while the ball discharge port of the spherical fuel element outlet 12 opens downward. When the spherical fuel elements 30 are lifted to the top of the curved section of the spherical fuel element outlet 12, the spherical fuel elements 30 are discharged from the spherical fuel discharge port into the core by the action of inertia and gravity.

[0054] The spherical fuel element inlet 11 and the lift shell body 102 can be of either a one-piece or split-piece structure. In the case of a split-piece structure, the two are preferably welded together. The spherical fuel element outlet 12 and the lift shell body 102 can be of either a one-piece or split-piece structure. In the case of a split-piece structure, the two are preferably welded together. It should be noted that the lift shell body 102 can be of a one-piece structure or composed of multiple sections.

[0055] Furthermore, the base 101 is provided with a receiving groove capable of receiving the lifting body 20. In the initial state, the lifting body 20 is provided on the base 101. In some specific embodiments, such as Figure 1 As shown, the lifting body 20 includes a first lifting portion 21 and a second lifting portion 22 . The first lifting portion 21 is a T-shaped structure. The T-shaped portion of the first lifting portion 21 is inserted into and exposed in the second lifting portion 22 , and the exposed portion cooperates with the receiving groove on the base 101 .

[0056] Furthermore, in some specific embodiments, the inner diameter of the lifting shell 10 is larger than the outer diameter of the lifting body 20 , and the lifting body 20 is placed inside the lifting shell 10 . This approach has a simple structure.

[0057] In other specific embodiments, a slide rail is provided on the lifting shell 10, and a slider or pulley that slides with the slide rail is provided on the lifting body 20. This approach can reduce the friction between the lifting body 20 and the lifting shell 10.

[0058] In addition, if Figure 2As shown, the embodiment of the present application further discloses a method for lifting a spherical fuel element, which uses the spherical fuel element lifting device of the above embodiment, including the steps of:

[0059] Step S1: The spherical fuel element 30 enters the spherical fuel element lifting channel 13 and falls onto the lifting body 20;

[0060] Specifically, the spherical fuel elements 30 discharged from the core enter the spherical fuel element lifting channel 13 from the spherical fuel element inlet 11 under the action of gravity and fall onto the supporting groove 201 of the lifting body 20.

[0061] Step S2: lifting the spherical fuel element 30;

[0062] Along the vertical direction of the lifting shell 10, each electromagnetic coil 40 is energized sequentially, lifting the lifting body 20. The lifting body 20 then drives the spherical fuel elements 30 upward, and the spherical fuel elements 30 are discharged from the spherical fuel element outlet 12. Specifically, the detection assembly 50 detects the position of the spherical fuel elements 30 and feeds a signal back to the control assembly. The control assembly determines the specific position of the electromagnetic coil 40 that needs to be energized or deenergized, transmits the signal to the corresponding electromagnetic coil 40, and the corresponding electromagnetic coil 40 is energized or deenergized. In this order, the spherical fuel elements 30 are lifted.

[0063] It should be noted that each embodiment in this specification focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referenced to each other.

[0064] In the following, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0065] In the description of the embodiments of the present application, it should be noted that the terms "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0066] This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above examples is only intended to help understand the core ideas of this application. It should be noted that for those skilled in the art, without departing from the principles of this application, various improvements and modifications can be made to this application, and such improvements and modifications also fall within the scope of protection of the claims of this application.

[0067] Furthermore, those skilled in the art may combine and combine different embodiments or examples and features of different embodiments or examples described in this specification without mutual contradiction.

Claims

1. A spherical fuel element lifting device, characterized in that: include: A lifting shell (10), wherein the lifting shell (10) is provided with a spherical fuel element inlet (11), a spherical fuel element outlet (12) and a spherical fuel element lifting passage (13), wherein the spherical fuel element inlet (11) and the spherical fuel element outlet (12) are both connected to the spherical fuel element lifting passage (13), and a plurality of electromagnetic coils (40) are provided on the lifting shell (10) along a vertical direction of the lifting shell (10); a lifting body (20), the lifting body (20) being movably disposed in the spherical fuel element lifting channel (13), the lifting body (20) having a supporting groove (201) capable of supporting the spherical fuel element (30), the lifting body (20) comprising a ferromagnetic material or the lifting body (20) being made of a ferromagnetic material, and being capable of attracting the lifting body (20) to move in a direction close to the electromagnetic coil (40) when the electromagnetic coil (40) is energized; a detection assembly (50), the detection assembly (50) being arranged on the lifting shell (10), and the detection assembly (50) being capable of detecting the position of the spherical fuel element (30); A control component, each of the electromagnetic coils (40) and the detection component (50) is connected to the control component.

2. The spherical fuel element lifting device according to claim 1, characterized in that: The lifting body (20) comprises a first lifting portion (21) and a second lifting portion (22) connected to each other, and the supporting groove (201) is provided on the first lifting portion (21); The ferromagnetic material is arranged on at least one of the first lifting part (21) and the second lifting part (22), and a buffer structure is arranged between the first lifting part (21) and the second lifting part (22).

3. The spherical fuel element lifting device according to claim 2, characterized in that: The buffer structure includes at least one of a spring, a rubber elastic member, or a metal spring.

4. The spherical fuel element lifting device according to claim 2, characterized in that: The first lifting part (21) and the second lifting part (22) are provided with communicating debris and dust holes, and the bottom of the lifting shell (10) is provided with a debris and dust collecting assembly.

5. The spherical fuel element lifting device according to claim 4, characterized in that: The lifting body (20) includes a plurality of lifting part assemblies connected to each other in series, and the lifting part assembly includes the first lifting part (21) and the second lifting part (22) connected to each other.

6. The spherical fuel element lifting device according to claim 1, characterized in that: The lifting shell (10) comprises a base (101) and a lifting shell body (102), and the lifting shell body (102) and the base (101) are detachably connected; The spherical fuel element inlet (11), the spherical fuel element outlet (12) and the spherical fuel element lifting channel (13) are all arranged on the lifting shell body (102). The spherical fuel element inlet (11) is arranged at the bottom of the lifting shell body (102) and is arranged obliquely with respect to the lifting shell body (102). The spherical fuel element outlet (12) is arranged at the top of the lifting shell body (102) and is arranged as a curved pipe structure.

7. The spherical fuel element lifting device according to claim 1, characterized in that: The inner diameter of the lifting shell (10) is greater than the outer diameter of the lifting body (20).

8. The spherical fuel element lifting device according to claim 1, characterized in that: The lifting shell (10) is provided with a slide rail, and the lifting body (20) is provided with a slider or a pulley that is in sliding cooperation with the slide rail.

9. A method for lifting a spherical fuel element, using the spherical fuel element lifting device according to any one of claims 1 to 8, characterized in that: Including steps: The spherical fuel element (30) enters the spherical fuel element lifting channel (13) and falls onto the lifting body (20); The spherical fuel element (30) is lifted, and each of the electromagnetic coils (40) is energized in sequence along the vertical direction of the lifting shell (10), thereby lifting the lifting body (20). The lifting body (20) drives the spherical fuel element (30) to rise until the spherical fuel element (30) is discharged from the spherical fuel element outlet (12).

10. The method for lifting a spherical fuel element according to claim 9, wherein: The step of lifting the spherical fuel element (30) specifically includes: the detection component (50) detects the position of the spherical fuel element (30) in the spherical fuel element lifting channel (13), feeds back to the control component, and the control component controls the corresponding electromagnetic coil (40) to turn on and off power to lift the lifting body (20).

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