Mechanical fuel ball lifting device of high-temperature gas cooled reactor

Abstract

The invention discloses a mechanical fuel ball lifting device for a high-temperature gas cooled reactor, which comprises a lifting pipe provided with a lifting pipe feed port and a lifting pipe discharge port, the lifting pipe feed port is communicated with the discharge port of a reactor pressure vessel, and the lifting pipe discharge port is communicated with the feed port of the reactor pressure vessel; the clamp holder is provided with an open first position and a closed second position; the clamping device driving mechanism is connected with the clamping device; when the clamping device driving mechanism drives the clamping device to move to the position of the feeding port of the lifting pipe, the clamping device is located at the first position; after the fuel ball enters the clamp holder, the clamp holder is converted from the first position to the second position; and when the clamping device driving mechanism drives the clamping device to move to the position of the discharging port of the lifting pipe, the clamping device is converted into the first position from the second position. The fuel balls are directly grabbed through the mechanical clamping device and stably lifted along the axis of the lifting pipe, pneumatic friction collision between the fuel balls and the pipeline is avoided, the generation rate of chippings is greatly reduced, and therefore the blocking risk is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of high-temperature gas-cooled reactors, and in particular to a mechanical fuel ball lifting device for high-temperature gas-cooled reactors. Background Art

[0002] The HTGR's fuel loading and unloading system utilizes a "non-stop, online, continuous refueling" process. Fuel spheres are gravity-discharged from the bottom of the reactor core and pneumatically transported to the upper core by a helium compressor. The flow of fuel spheres continues in a reciprocating cycle. However, as fuel spheres are transported through the fuel loading and unloading system's pipelines, collisions and friction can create debris, leading to localized blockages and reducing transport efficiency. Summary of the Invention

[0003] In view of this, the present invention provides a mechanical fuel ball lifting device for a high-temperature gas-cooled reactor to solve the problem that the current method of blowing the fuel balls by pneumatic force may cause local blockage.

[0004] In a first aspect, the present invention provides a mechanical fuel ball lifting device for a high-temperature gas-cooled reactor, comprising:

[0005] A riser, wherein a riser feed port is provided at the bottom of the riser, a riser discharge port is provided at the top of the riser, the riser feed port is connected to the discharge port of the reactor pressure vessel via a ball unloading pipe, and the riser discharge port is connected to the feed port of the reactor pressure vessel via a ball loading pipe;

[0006] a gripper disposed within the riser, the gripper having an open first position and a closed second position;

[0007] a gripper drive mechanism connected to the gripper and used to drive the gripper to move along the axis of the lifting pipe;

[0008] When the clamp driving mechanism drives the clamp to move to the position of the riser feed port, the clamp is in the first position so that the fuel balls discharged from the ball unloading pipe enter the clamp;

[0009] After the fuel ball enters the holder, the holder changes from the first position to the second position;

[0010] When the clamp driving mechanism drives the clamp to move to the position of the riser outlet, the clamp changes from the second position to the first position to release the fuel ball and allow the fuel ball to pass through the ball loading tube into the reactor pressure vessel.

[0011] The beneficial effects of this mechanical fuel sphere lifting device for high-temperature gas-cooled reactors include: a mechanical gripper directly grasps the fuel sphere and smoothly lifts it along the axis of the lifting tube, avoiding aerodynamic friction and collision between the fuel sphere and the tube, significantly reducing debris generation, thereby reducing the risk of blockage and achieving excellent reliability. This eliminates the need for continuous power supply from a traditional helium compressor, requiring only intermittent drive of the gripper, conserving helium resources and energy consumption, and avoiding the frequent startup of the traditional helium compressor.

[0012] This embodiment automates the entire fuel sphere "grab, lift, and release" process through the coordinated opening and closing of the gripper and the drive mechanism, eliminating the need for downtime for refueling and ensuring continuous reactor operation. Mechanical gripping ensures that the fuel spheres follow a fixed path, preventing fuel stagnation or uneven distribution caused by insufficient air pressure.

[0013] In an optional embodiment, the clamper drive mechanism includes:

[0014] Rope drive assembly;

[0015] A rope is connected to the gripper and is driven by the rope drive assembly to move the gripper in the riser.

[0016] In an optional embodiment, the rope is arranged along the axis of the riser.

[0017] In an optional embodiment, the rope drive assembly includes:

[0018] An upper end capstan, the upper end capstan being arranged on the top of the lifting pipe and above the discharge port of the lifting pipe;

[0019] A lower end capstan, the lower end capstan being arranged at the bottom of the riser and below the feed port of the riser;

[0020] The rope is looped between the upper end capstan and the lower end capstan.

[0021] In an optional embodiment, the holder comprises:

[0022] a first clamping piece, the first clamping piece having a first clamping portion, a first inclined portion, and a first positioning portion;

[0023] a second clamping piece, wherein the middle portion of the second clamping piece is cross-hinged with the middle portion of the first clamping piece and is hinged on the rope, the second clamping piece having a second clamping portion, a second inclined portion, and a second positioning portion, the second clamping portion is arranged opposite to the first clamping portion and the two portions form a first opening, and the second positioning portion is arranged opposite to the first positioning portion and the two portions form a second opening;

[0024] a spring disposed between the first positioning portion and the second positioning portion;

[0025] a bottom tray, the bottom tray being fixedly disposed on the rope and being located below the first clamping portion and the second clamping portion;

[0026] The clamping piece control component controls the movement of the first clamping piece and the second clamping piece to switch between the first position and the second position.

[0027] The beneficial effects of this technical solution are as follows: the clamping plate control assembly controls the movement of the first and second clamping plates to switch between the first and second positions. The clamping plates quickly open at the feed inlet of the riser to receive the fuel spheres and precisely release them when they are lifted to the discharge outlet, achieving a seamless process and improving conveying efficiency. Mechanical opening and closing is more controllable and delay-free than pneumatic conveying, preventing the stagnation or accumulation of fuel spheres caused by pneumatic fluctuations.

[0028] In an optional embodiment, the riser feed port and the riser discharge port are arranged in the same direction on the side of the riser, and the first opening is arranged in the same direction as the riser feed port and the riser discharge port, respectively.

[0029] In an optional embodiment, the clamping piece control assembly includes:

[0030] an upper end electromagnetic coil, the upper end electromagnetic coil being arranged at the position of the lifting tube discharge port, and being located at the periphery of the first clamping piece and the second clamping piece when the clamper moves to the position of the lifting tube discharge port; when the upper end electromagnetic coil is energized, the upper end electromagnetic coil generates a magnetic force and attracts the first clamping piece and the second clamping piece, and when the attraction of the upper end electromagnetic coil to the first clamping piece and the second clamping piece is greater than the squeezing force of the spring on the first clamping piece and the second clamping piece, the first opening between the first clamping piece and the second clamping piece expands;

[0031] The lower end electromagnetic coil is arranged at the lifting tube feed port position. When the clamper moves to the lifting tube feed port position, the lower end electromagnetic coil is located outside the first clamping piece and the second clamping piece. When the lower end electromagnetic coil is energized, the lower end electromagnetic coil generates magnetic force and attracts the first clamping piece and the second clamping piece. When the attraction of the lower end electromagnetic coil to the first clamping piece and the second clamping piece is greater than the squeezing force of the spring on the first clamping piece and the second clamping piece, the first opening between the first clamping piece and the second clamping piece expands.

[0032] The beneficial effects of the above technical solution are as follows: when the clamp is outside the range of the electromagnetic coil, the clamp is maintained in a clamped state by the spring compression force; when the clamp enters the range of the electromagnetic coil, the electromagnetic coil is energized, generating a magnetic force in the corresponding magnetic pole, which offsets the spring compression force, loosens the clamp, and allows the fuel balls to enter or exit the riser by gravity. When the clamp moves to the riser feed or discharge port, the corresponding electromagnetic coil is energized to generate a magnetic field, which attracts the first and second clamping plates through magnetic force, achieving contactless expansion of the first opening. This enables precise, rapid, and low-loss opening and closing of the clamp, adapting to the harsh operating conditions of high-temperature gas-cooled reactors.

[0033] In an optional embodiment, both the first clamping piece and the second clamping piece are made of ferromagnetic material;

[0034] The upper end electromagnetic coil and the lower end electromagnetic coil both have a first magnetic pole and a second magnetic pole, the first magnetic pole is close to the first clamping plate and is located outside the first clamping plate, and the second magnetic pole is close to the second clamping plate and is located outside the second clamping plate; when the upper end electromagnetic coil or the lower end electromagnetic coil is energized, the first magnetic pole and the second magnetic pole both generate attraction.

[0035] In an optional embodiment, the riser feed port is located below the discharge port of the reactor pressure vessel, and the ball unloading pipe is arranged obliquely downward from the discharge port of the reactor pressure vessel to the riser feed port, so that the fuel balls discharged from the discharge port of the reactor pressure vessel can automatically fall to the riser feed port under the action of gravity;

[0036] And / or, the riser outlet is located above the feed port of the reactor pressure vessel, and the ball loading tube is arranged obliquely downward from the riser outlet to the feed port of the reactor pressure vessel, so that the fuel balls discharged from the riser outlet can automatically fall to the feed port of the reactor pressure vessel under the action of gravity.

[0037] In an optional embodiment, a valve is provided on the ball unloading pipe and / or the ball loading pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0039] Figure 1 A schematic structural diagram of a mechanical fuel ball lifting device for a high-temperature gas-cooled reactor provided by the present invention;

[0040] Figure 2 A top view of a clamp in a mechanical fuel ball lifting device for a high-temperature gas-cooled reactor provided by the present invention;

[0041] Figure 3 A side view of a clamp in a mechanical fuel ball lifting device for a high-temperature gas-cooled reactor provided by the present invention.

[0042] Description of reference numerals:

[0043] 1. Reactor pressure vessel, 2. Ball unloading tube, 3. Ball loading tube, 4. Lifting tube, 5. Rope, 6. Clamp, 61. First clamping piece, 611. First clamping portion, 612. First inclined portion, 613. First positioning portion, 62. Second clamping piece, 621. Second clamping portion, 622. Second inclined portion, 623. Second positioning portion, 63. Bottom tray, 64. Spring, 66. Second opening, 7. Fuel ball, 8. Upper end capstan, 9. Lower end capstan, 10. Upper end electromagnetic coil, 11. Lower end electromagnetic coil, 12. Valve. DETAILED DESCRIPTION

[0044] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative efforts shall fall within the scope of protection of the present invention.

[0045] According to an embodiment of the present invention, a mechanical fuel ball lifting device for a high temperature gas-cooled reactor is provided. Figures 1 to 3 As shown, a mechanical lifting mechanism includes a lifting pipe 4, a clamper 6 and a clamper driving mechanism.

[0046] Riser 4 is a fuel ball delivery conduit. A riser inlet is located at the bottom of riser 4, and a riser outlet is located at the top. The riser inlet is connected to the outlet of reactor pressure vessel 1 via a ball unloading pipe 2, while the riser outlet is connected to the feed inlet of reactor pressure vessel 1 via a ball loading pipe 3. The inner diameters of the riser inlet and outlet are larger than the outer diameter of the fuel balls to ensure passage of the fuel balls.

[0047] A gripper 6 is provided inside the riser 4 , the gripper 6 having a first open position and a second closed position.

[0048] The gripper drive mechanism is connected to the gripper 6 and is used to drive the gripper 6 to move along the axis of the riser 4. The gripper drive mechanism can accurately control the position and movement trajectory of the fuel balls, ensuring continuous and stable transfer of the fuel balls from the ball unloading pipe 2 to the ball loading pipe 3.

[0049] When the clamper driving mechanism drives the clamper 6 to move to the position of the riser feed port, the clamper 6 is in the first position, so that the fuel balls 7 discharged from the ball unloading pipe 2 enter the clamper 6.

[0050] After the fuel ball 7 enters the holder 6, the holder 6 changes from the first position to the second position.

[0051] When the clamp driving mechanism drives the clamp 6 to move to the riser outlet position, the clamp 6 changes from the second position to the first position to release the fuel ball 7 and allow the fuel ball 7 to enter the reactor pressure vessel 1 through the ball loading tube 3.

[0052] The mechanical fuel sphere lifting device for high-temperature gas-cooled reactors (HTGRs) directly grasps the fuel sphere 7 with a mechanical gripper 6 and smoothly lifts it along the axis of the riser 4. This avoids aerodynamic friction and collision between the fuel sphere and the pipe, significantly reducing debris generation and the risk of jamming, resulting in superior reliability. This eliminates the need for continuous energy supply from a traditional helium compressor, requiring only intermittent drive of the gripper, conserving helium resources and energy consumption, and avoiding the frequent startup of the traditional helium compressor.

[0053] This embodiment automates the entire fuel sphere "grab, lift, and release" process through the coordinated opening and closing of the gripper and the drive mechanism, eliminating the need for downtime for refueling and ensuring continuous reactor operation. Mechanical gripping ensures that the fuel spheres follow a fixed path, preventing fuel stagnation or uneven distribution caused by insufficient air pressure.

[0054] In some embodiments, the gripper drive mechanism includes a rope drive assembly and a rope 5. The rope 5 is connected to the gripper 6 and is driven by the rope drive assembly to move the gripper 6 within the riser 4. The rope 5 is a steel wire rope, but may also be a rope made of other materials.

[0055] Furthermore, the rope 5 is arranged along the axis of the lifting tube 4 , thereby driving the clamper 6 to rise and fall along the axis of the lifting tube 4 .

[0056] More specifically, the rope drive assembly includes an upper end capstan 8 and a lower end capstan 9. The upper end capstan 8 is disposed at the top of the lifting tube 4 and above the lifting tube discharge port. The lower end capstan 9 is disposed at the bottom of the lifting tube 4 and below the lifting tube feed port. The rope 5 is sleeved between the upper end capstan 8 and the lower end capstan 9, and the two capstans work together to drive the rope up and down. In this embodiment, the upper end capstan 8 is an active capstan. The upper end capstan 8 can be connected to a first rotating shaft extending from the lifting tube 4 and connected to a drive motor. Driven by the drive motor, the upper end capstan 8 rotates, thereby driving the rope 5 to move up and down. Alternatively, the lower end capstan 9 is an active capstan. The lower end capstan 9 can be connected to a second rotating shaft extending from the lifting tube 4 and connected to the drive motor. Driven by the drive motor, the lower end capstan 9 rotates, thereby driving the rope 5 to move up and down.

[0057] In some embodiments, the clamp 6 includes a first clamping piece 61, a second clamping piece 62, a spring 64, a bottom tray 63, and a clamping piece control assembly. The first clamping piece 61 has a first clamping portion 611, a first inclined portion 612, and a first positioning portion 613. The middle portion of the second clamping piece 62 is hingedly connected to the middle portion of the first clamping piece 61 and cross-connected to the rope 5. The second clamping piece 62 has a second clamping portion 621, a second inclined portion 622, and a second positioning portion 623. The second clamping portion 621 is disposed opposite the first clamping portion 611 and defines a first opening therebetween. The second positioning portion 623 is disposed opposite the first positioning portion 613 and defines a second opening 66 therebetween. The spring 64 is disposed between the first positioning portion 613 and the second positioning portion 623 and exerts a compressive force on the first and second positioning portions 613 and 623. The first and second clamping pieces 61, 62 are hinged to the rope 5 at their midsections, creating a symmetrical and adaptive clamping force, combined with the squeezing force exerted by the spring 64 on the second positioning portion 623 and the first positioning portion 613. The first and second clamping pieces 61, 62 can be moved about the rope 5 by the spring 64 and the electromagnetic coil.

[0058] The bottom tray 63 is fixed to the rope 5 and is located below the first clamping portion 611 and the second clamping portion 621. When the fuel ball enters the first opening of the clamp 6, it is lifted by the bottom tray 63, limiting the bottom of the fuel ball. The clamping piece control assembly then controls the clamp 6 to clamp the fuel ball. To facilitate the fuel ball's sliding out of the bottom tray 63, the top of the bottom tray 63 is configured as an inclined surface. When the first clamping piece 61 and the second clamping piece 62 no longer clamp the fuel ball, the fuel ball can automatically slide out of the bottom tray 63 under the action of gravity.

[0059] The clamping plate control assembly controls the movement of the first and second clamping plates 61, 62, switching between the first and second positions. The clamping plates quickly open (first position) at the riser inlet to receive the fuel spheres, and precisely release them (second position → first position) when they are lifted to the discharge port, achieving a seamless transition throughout the entire process and improving conveying efficiency. Mechanical opening and closing is more controllable and delay-free than pneumatic conveying, preventing fuel sphere stagnation or accumulation due to pneumatic fluctuations.

[0060] In some embodiments, the riser feed port and the riser discharge port are arranged in the same direction on the side of the riser 4, and the first opening is arranged in the same direction as the riser feed port and the riser discharge port, respectively, so that the fuel balls can directly enter the first opening of the clamper 6 after being discharged from the ball unloading pipe 2. When they are directly lifted vertically along the axis of the riser 4 to the position of the riser discharge port, they can directly enter the ball loading pipe 3 from the first opening of the clamper 6 without turning or complex path adjustment.

[0061] In some embodiments, the clamping piece control assembly includes an upper end electromagnetic coil 10 and a lower end electromagnetic coil 11 .

[0062] The upper end electromagnetic coil 10 is arranged at the lifting tube discharge port position. When the clamper 6 moves to the lifting tube discharge port position, the upper end electromagnetic coil 10 is located outside the first clamping piece 61 and the second clamping piece 62; when the upper end electromagnetic coil 10 is energized, the upper end electromagnetic coil 10 generates magnetic force and attracts the first clamping piece 61 and the second clamping piece 62. When the attraction of the upper end electromagnetic coil 10 to the first clamping piece 61 and the second clamping piece 62 is greater than the squeezing force of the spring 64 on the first clamping piece 61 and the second clamping piece 62, the first opening between the first clamping piece 61 and the second clamping piece 62 expands.

[0063] The lower end electromagnetic coil 11 is set at the lifting tube feed port position. When the clamper 6 moves to the lifting tube feed port position, the lower end electromagnetic coil 11 is located outside the first clamping piece 61 and the second clamping piece 62; when the lower end electromagnetic coil 11 is energized, the lower end electromagnetic coil 11 generates magnetic force and attracts the first clamping piece 61 and the second clamping piece 62. When the attraction of the lower end electromagnetic coil 11 to the first clamping piece 61 and the second clamping piece 62 is greater than the squeezing force of the spring 64 on the first clamping piece 61 and the second clamping piece 62, the first opening between the first clamping piece 61 and the second clamping piece 62 expands.

[0064] In this embodiment, when the clamp 6 is outside the range of the electromagnetic coil, the clamp 6 is held in place by the spring's compression force. When the clamp enters the range of the electromagnetic coil, the electromagnetic coil is energized, generating a magnetic force within the corresponding magnetic pole. This magnetic force offsets the spring's compression force, loosening the clamp and allowing the fuel balls to enter or exit the riser by gravity. When the clamp 6 moves to the riser's inlet or outlet, the corresponding electromagnetic coil is energized to generate a magnetic field, which magnetically attracts the first clamping piece 61 and the second clamping piece 62, achieving contactless expansion of the first opening. This allows for precise, rapid, and low-loss opening and closing of the clamp 6, adapting to the demanding operating conditions of a high-temperature gas-cooled reactor.

[0065] More specifically, both the first clamping piece 61 and the second clamping piece 62 are made of ferromagnetic material. Both the upper electromagnetic coil 10 and the lower electromagnetic coil 11 have a first magnetic pole and a second magnetic pole. The first magnetic pole is located near and outside the first clamping piece 61, while the second magnetic pole is located near and outside the second clamping piece 62. When power is applied to the upper electromagnetic coil 10 or the lower electromagnetic coil 11, both the first magnetic pole and the second magnetic pole generate an attractive force.

[0066] When the power is turned off, the magnetic force of the electromagnetic coil disappears, and the spring 64 immediately presses the first positioning portion 613 and the second positioning portion 623, driving the first clamping piece 61 and the second clamping piece 62 to quickly close and reset, thereby clamping the fuel ball.

[0067] In some embodiments, the riser feed port is located below the discharge port of the reactor pressure vessel 1, and the ball unloading pipe 2 is arranged downwardly from the discharge port of the reactor pressure vessel 1 to the riser feed port, so that the fuel balls discharged from the discharge port of the reactor pressure vessel 1 can automatically fall to the riser feed port under the action of gravity.

[0068] The riser outlet is located above the feed port of the reactor pressure vessel 1, and the ball loading tube 3 is arranged obliquely downward from the riser outlet to the feed port of the reactor pressure vessel 1, so that the fuel balls discharged from the riser outlet can automatically fall to the feed port of the reactor pressure vessel 1 under the action of gravity.

[0069] In some embodiments, a valve 12 is provided on the ball unloading pipe 2 to control the time when the fuel balls enter the riser from the ball unloading pipe 2. Alternatively, a valve is provided on the ball loading pipe 3 to control the time when the fuel balls enter the reactor pressure vessel 1 from the ball loading pipe 3.

[0070] The specific working process of the mechanical fuel ball lifting device for the high-temperature gas-cooled reactor is as follows:

[0071] Fuel spheres discharged from the reactor pressure vessel 1 enter the sphere unloading pipe 2 and are transported to the riser feed port through the sphere unloading pipe 2. At this point, the gripper 6 is located at the riser feed port, and the lower end electromagnetic coil 11 is energized. This generates an electromagnetic force that attracts the first and second clamping pieces 61, 62 of the gripper 6, opening the gripper 6 and placing it in the first position.

[0072] The fuel ball directly enters the first opening of the holder 6. Then, the electromagnetic coil 11 at the lower end is de-energized, so that the holder 6 is in the second position, and the first clamping piece 61 and the second clamping piece 62 of the holder 6 are lowered under the action of the spring to clamp the fuel ball.

[0073] Driven by the rope drive assembly, the rope 5 rises to the riser outlet. Then, the upper electromagnetic coil 10 is energized, generating an electromagnetic force that attracts the first and second clamping tabs 61, 62 of the gripper 6. The gripper 6 opens, assuming its first position. The fuel spheres are discharged from the gripper 6 and then enter the reactor pressure vessel 1 through the loading tube 3.

[0074] The rope 5 is driven by the rope driving assembly to descend again and return to the position of the feed port of the riser, completing the transportation of the fuel balls.

[0075] Although the embodiments of the present invention have been described with reference to the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention. Such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A mechanical fuel ball lifting device for a high temperature gas-cooled reactor, characterized in that: include: A lifting pipe (4), wherein a lifting pipe feed port is provided at the bottom of the lifting pipe (4), a lifting pipe discharge port is provided at the top of the lifting pipe (4), the lifting pipe feed port is communicated with the discharge port of the reactor pressure vessel (1) via a ball unloading pipe (2), and the lifting pipe discharge port is communicated with the feed port of the reactor pressure vessel (1) via a ball loading pipe (3); a clamp (6), the clamp (6) being arranged inside the riser (4), the clamp (6) having a first open position and a second closed position; a clamper driving mechanism connected to the clamper (6) and used to drive the clamper (6) to move along the axis of the lifting tube (4); When the clamp driving mechanism drives the clamp (6) to move to the position of the riser feed port, the clamp (6) is in the first position, so that the fuel balls (7) discharged from the ball unloading pipe (2) enter the clamp (6); After the fuel ball (7) enters the holder (6), the holder (6) changes from the first position to the second position; When the clamp driving mechanism drives the clamp (6) to move to the position of the riser outlet, the clamp (6) changes from the second position to the first position to release the fuel ball (7) and allow the fuel ball (7) to enter the reactor pressure vessel (1) through the ball loading tube (3).

2. The mechanical fuel ball lifting device for a high temperature gas-cooled reactor according to claim 1, characterized in that: The clamper driving mechanism comprises: Rope drive assembly; A rope (5) is connected to the gripper (6) and is driven by a rope drive assembly to move the gripper (6) in the lifting tube (4).

3. The mechanical fuel ball lifting device for a high temperature gas-cooled reactor according to claim 2, characterized in that: The rope (5) is arranged along the axis of the lifting pipe (4).

4. The mechanical fuel ball lifting device for a high temperature gas-cooled reactor according to claim 2, characterized in that: The rope drive assembly comprises: An upper end capstan (8), the upper end capstan (8) being arranged on the top of the lifting pipe (4) and located above the lifting pipe discharge port; A lower end capstan (9), the lower end capstan (9) being arranged at the bottom of the riser (4) and below the feed port of the riser; The rope (5) is sleeved between the upper end capstan (8) and the lower end capstan (9).

5. The mechanical fuel ball lifting device for a high temperature gas-cooled reactor according to claim 2, characterized in that: The holder (6) comprises: A first clamping piece (61), wherein the first clamping piece (61) has a first clamping portion (611), a first inclined portion (612) and a first positioning portion (613); a second clamping piece (62), wherein the middle portion of the second clamping piece (62) and the middle portion of the first clamping piece (61) are cross-hinged on the rope (5); the second clamping piece (62) comprises a second clamping portion (621), a second inclined portion (622) and a second positioning portion (623); the second clamping portion (621) and the first clamping portion (611) are arranged opposite to each other and form a first opening; the second positioning portion (623) and the first positioning portion (613) are arranged opposite to each other and form a second opening (66); a spring (64), wherein the spring (64) is disposed between the first positioning portion (613) and the second positioning portion (623); a bottom tray (63), the bottom tray (63) being fixedly mounted on the rope (5) and located below the first clamping portion (611) and the second clamping portion (621); A clamping piece control component controls the actions of the first clamping piece (61) and the second clamping piece (62) to switch between a first position and a second position.

6. The mechanical fuel ball lifting device for a high temperature gas-cooled reactor according to claim 5, characterized in that: The riser feed port and the riser discharge port are arranged in the same direction on the side of the riser (4), and the first opening is arranged in the same direction as the riser feed port and the riser discharge port respectively.

7. The mechanical fuel ball lifting device for a high temperature gas-cooled reactor according to claim 5, characterized in that: The clamping piece control assembly includes: an upper end electromagnetic coil (10), the upper end electromagnetic coil (10) being arranged at the position of the lifting tube discharge port, and when the clamp (6) moves to the position of the lifting tube discharge port, the upper end electromagnetic coil (10) is located outside the first clamping piece (61) and the second clamping piece (62); when the upper end electromagnetic coil (10) is energized, the upper end electromagnetic coil (10) generates magnetic force and attracts the first clamping piece (61) and the second clamping piece (62); when the attraction force of the upper end electromagnetic coil (10) on the first clamping piece (61) and the second clamping piece (62) is greater than the squeezing force of the spring (64) on the first clamping piece (61) and the second clamping piece (62), the first opening between the first clamping piece (61) and the second clamping piece (62) expands; The lower end electromagnetic coil (11) is arranged at the position of the lifting tube feed port. When the clamper (6) moves to the position of the lifting tube feed port, the lower end electromagnetic coil (11) is located outside the first clamping piece (61) and the second clamping piece (62); when the lower end electromagnetic coil (11) is energized, the lower end electromagnetic coil (11) generates magnetic force and attracts the first clamping piece (61) and the second clamping piece (62). When the attraction of the lower end electromagnetic coil (11) to the first clamping piece (61) and the second clamping piece (62) is greater than the squeezing force of the spring (64) on the first clamping piece (61) and the second clamping piece (62), the first opening between the first clamping piece (61) and the second clamping piece (62) expands.

8. The mechanical fuel ball lifting device for a high temperature gas-cooled reactor according to claim 7, characterized in that: The first clamping piece (61) and the second clamping piece (62) are both made of ferromagnetic material; The upper end electromagnetic coil (10) and the lower end electromagnetic coil (11) both have a first magnetic pole and a second magnetic pole, wherein the first magnetic pole is close to the first clamping piece (61) and is located outside the first clamping piece (61), and the second magnetic pole is close to the second clamping piece (62) and is located outside the second clamping piece (62); when the upper end electromagnetic coil (10) or the lower end electromagnetic coil (11) is energized, the first magnetic pole and the second magnetic pole both generate an attractive force.

9. The mechanical fuel ball lifting device for a high temperature gas-cooled reactor according to any one of claims 1 to 8, characterized in that: The riser feed port is located below the discharge port of the reactor pressure vessel (1), and the ball unloading pipe (2) is arranged in an inclined downward direction from the discharge port of the reactor pressure vessel (1) to the riser feed port; And / or, the riser outlet is located above the feed port of the reactor pressure vessel (1), and the ball loading tube (3) is arranged obliquely downward from the riser outlet to the feed port of the reactor pressure vessel (1).

10. The mechanical fuel ball lifting device for a high temperature gas-cooled reactor according to any one of claims 1 to 8, characterized in that: The ball unloading pipe (2) and / or the ball loading pipe (3) are provided with a valve (12).

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