A high temperature reactor reciprocating fuel lifting device and a fuel lifting method

Abstract

The present invention proposes a reciprocating fuel lifting device and a fuel lifting method for a high-temperature reactor. The fuel lifting device includes a side support, a fuel lifting mechanism and a driving mechanism. A guide rail for the vertical sliding of the fuel lifting mechanism is formed between the two side supports. A plurality of groups of ball through holes are provided on both sides of the side supports. The side supports are connected to the ball tube and the ball outlet tube. The driving mechanism drives the fuel lifting mechanism to continuously reciprocate up and down until the fuel balls are transported to the ball outlet tube, and then transported to the target position after passing through the pressure shell. The present invention uses a mechanical lifting method to transport the fuel elements from a low place to a high place. It does not require the configuration of a complex pneumatic conveying system, which is conducive to simplifying the system configuration and avoiding equipment failures and helium sealing problems caused by complex systems; the present invention has the conditions for vertical arrangement to improve the fuel transmission efficiency; the present invention uses the reciprocating principle to transport the fuel elements, which is conducive to improving the reliability of the equipment.

Description

Technical Field

[0001] The present invention relates to the field of reactor engineering technology, and in particular to a high-temperature reactor reciprocating fuel lifting device and a fuel lifting method. Background Art

[0002] The reactor core of the pebble bed high temperature gas-cooled reactor is made of spherical fuel elements. The favorable geometric shape of the spherical fuel elements can realize the reactor's non-stop refueling function. During the operation of the reactor, the fuel elements in the active area of ​​the core flow from top to bottom by gravity and are discharged from the discharge pipe at the bottom of the pressure vessel. The discharged fuel elements first enter the core discharge device, which singulates the fuel elements and transports them to the downstream ball separation device. After the ball separation, the balls fall into the ball tank, and the intact fuel elements enter the burnup measurement and positioning device for burnup measurement. The spent fuel elements that have reached the target burnup depth are transported to the spent fuel discharge pipeline and finally loaded into the spent fuel storage tank for storage. The fuel elements that have not reached the target burnup are transported to the core recirculation pipeline. After the fuel elements reach the lowest point of the gravity ball drop pipeline, they need to be transported back to the core by pneumatic lifting or mechanical lifting. The use of pneumatic conveying to lift fuel elements requires the configuration of a complex pneumatic conveying system. Due to the large number of pipelines and equipment, it is necessary to overcome the great helium sealing problem. At the same time, the fuel lifting efficiency is greatly limited by the turbulent characteristics of the fluid. Therefore, studying the mechanical lifting method to transport fuel elements is of great significance for simplifying the configuration of the fuel loading and unloading system and improving the transportation efficiency of fuel elements. Summary of the invention

[0003] The purpose of the present invention is to provide a high-temperature reactor reciprocating fuel lifting device and a fuel lifting method, so as to simplify the configuration of the fuel loading and unloading system and improve the fuel element transportation efficiency, thereby improving the operating stability and economy of the fuel loading and unloading system.

[0004] On the one hand, an embodiment of the present application provides a high-temperature reactor reciprocating fuel lifting device, including: a side support, a fuel lifting mechanism and a driving mechanism.

[0005] The side supports are provided with two, both of which are arranged perpendicular to the horizontal plane, and a guide rail for vertical sliding of the fuel lifting mechanism is formed between the two parallel side supports. A plurality of groups of ball passing holes are opened on both sides of the side supports, and each group of ball passing holes includes a first ball passing hole at a relatively low position and a second ball passing hole at a relatively high position. Each group of the first ball passing holes and the second ball passing holes are connected by an external inclined transmission pipe, and the first ball passing hole and the second ball passing hole are respectively located on the two side supports, and the side supports near the bottom are connected to the ball pipe, and the transmission pipe at the uppermost end of the side supports is connected to the ball outlet pipe.

[0006] Several groups of goal holes and ball outlets are provided on both sides of the fuel lifting mechanism, and each group of goal holes and ball outlets are connected to form a ball passing channel. In each group of goal holes and ball outlets, the goal hole is higher than the ball outlet. Through the vertical sliding of the fuel lifting mechanism, the goal tube or one of the first ball passing holes is connected to one of the goal holes, or one of the second ball passing holes is connected to one of the ball outlets.

[0007] The driving mechanism is connected to and drives the fuel lifting mechanism to move vertically back and forth between the two side supports.

[0008] The high temperature reactor reciprocating fuel lifting device of the present invention uses a mechanical lifting method to transport fuel elements from a low place to a high place, and does not need to configure a complex pneumatic conveying system, which is conducive to simplifying system configuration and avoiding equipment failures and helium sealing problems caused by complex systems.

[0009] The high temperature reactor reciprocating fuel lifting device of the present invention has the condition of being arranged vertically, which is beneficial to shortening the fuel transmission path and improving the fuel transmission efficiency.

[0010] In some embodiments, a pressure shell is also included, wherein the side support, the fuel lifting mechanism and the transmission pipe are all arranged in the pressure shell, the outward ends of the ball pipe and the ball outlet pipe are both extended out of the pressure shell, and the driving mechanism is installed on the top head above the pressure shell.

[0011] In some embodiments, the upper end of the side support member is fixedly connected to the top support member, the lower end of the side support member is fixedly connected to the bottom support member, the top support member is fixedly installed at the top inside the pressure shell, the bottom support member is fixedly installed at the bottom inside the pressure shell, the bottom end of the fuel lifting mechanism is fixedly connected to the guide rod, and the bottom support member is provided with a bottom guide hole for the guide rod to pass through.

[0012] In some embodiments, the driving mechanism includes a motor and a transmission, the output end of the motor is connected to the input end of the transmission, the output end of the transmission is connected to the screw, the top head and the top support are provided with screw holes for the screw to pass through, and the lower end of the screw is connected to the upper end of the fuel lifting mechanism through a bearing.

[0013] In some embodiments, the fuel lifting mechanism includes a plurality of sliders that are detachably connected to each other in the vertical direction, each slider is provided with a set of ball inlets and ball outlets, the uppermost slider is connected to the screw through a bearing, and the lowermost slider is fixedly connected to the guide rod.

[0014] In some embodiments, two adjacent sliders are connected via threads.

[0015] In some embodiments, a top shaft is fixedly provided at the upper end of the slider, and an external thread is provided on the top shaft. A bottom groove is opened at the lower end of the slider, and an internal thread matching the external thread of the top shaft is provided in the bottom groove. Two adjacent sliders are connected by threads between the top shaft and the bottom groove. A guide rod is fixedly connected in the bottom groove of the slider at the lower end, and the top shaft of the slider at the upper end is connected to the lead screw through a bearing.

[0016] In some embodiments, the slider is made of carbon fiber to reduce the weight of the action parts and save energy consumption of the driving mechanism.

[0017] In some embodiments, the spacing between the ball inlets of two adjacent sliders is equal, the spacing between the ball outlets of two adjacent sliders is equal, the spacing between two adjacent first ball through holes on the side support is equal, and the spacing between two adjacent second ball through holes is equal.

[0018] Another aspect of the present application embodiment provides a fuel lifting method, using the high temperature reactor reciprocating fuel lifting device, comprising the following steps:

[0019] S1, in the initial position, the goal tube is connected to the goal port of the slider at the bottom, and each first ball-passing hole is connected to the goal port of a corresponding slider. During loading, the first fuel ball enters from the goal tube, passes through the pressure-bearing shell, and enters the ball-passing channel of the slider at the bottom of the fuel lifting mechanism through the side support member;

[0020] S2, the driving mechanism drives the fuel lifting mechanism to move upward, driving the first fuel ball to move upward synchronously, and when the slider at the lower end moves to communicate with the first second ball through hole of the side support member, the first fuel ball enters the first second ball through hole and rolls along the transmission pipe to the first first ball through hole;

[0021] S3, the driving mechanism drives the fuel lifting mechanism to move downward to the initial position, the first ball-passing hole is connected with the ball-passing hole of the second slider, the first fuel ball enters the ball-passing channel of the second slider, and at the same time, the second fuel ball enters the ball-passing channel of the slider at the lower end from the ball-passing tube;

[0022] S4, the driving mechanism drives the fuel lifting mechanism to move upward, driving the first fuel ball and the second fuel ball to move upward synchronously, and when the second slider moves to communicate with the second second ball through hole of the side support, the first fuel ball enters the second second ball through hole and rolls along the transmission pipe to the second first ball through hole; at the same time, when the lowermost slider moves to communicate with the first second ball through hole of the side support, the second fuel ball enters the first second ball through hole and rolls along the transmission pipe to the first first ball through hole;

[0023] S5, the driving mechanism drives the fuel lifting mechanism to continuously reciprocate up and down until the fuel balls are transported to the ball outlet pipe, pass through the pressure-bearing shell, and are transported to the target position.

[0024] The beneficial effects of the present invention are:

[0025] (1) The high temperature reactor reciprocating fuel lifting device of the present invention uses a mechanical lifting method to transport fuel elements from a low place to a high place, and does not require a complex pneumatic conveying system, which is conducive to simplifying the system configuration and avoiding equipment failures and helium sealing problems caused by complex systems;

[0026] (2) The high temperature reactor reciprocating fuel lifting device of the present invention has the conditions for vertical arrangement, which is conducive to shortening the fuel transmission path and improving the fuel transmission efficiency;

[0027] (3) The high temperature reactor reciprocating fuel lifting device of the present invention adopts the reciprocating principle to transport fuel elements, has a simple structure, and has fewer matching parts, which is conducive to improving the reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings.

[0029] in:

[0030] Figure 1 It is a structural schematic diagram of a high temperature reactor reciprocating fuel lifting device in an embodiment of the present application;

[0031] Figure 2 It is a schematic diagram of the internal structure of a high temperature reactor reciprocating fuel lifting device in an embodiment of the present application;

[0032] Figure 3 This is a schematic diagram of the structure of the slider in the embodiment of the present application;

[0033] Reference numerals:

[0034] 1-driving mechanism; 2-top sealing head; 3-top support; 4-ball outlet pipe; 5-transmission pipe; 6-slider; 601-top shaft; 602-ball inlet; 603-ball outlet; 604-ball passage; 605-bottom groove; 7-ball inlet; 8-cylinder; 9-screw; 10-side support; 11-bottom support; 12-guide rod. DETAILED DESCRIPTION

[0035] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0036] The following describes a high temperature reactor reciprocating fuel lifting device according to an embodiment of the present invention with reference to the accompanying drawings.

[0037] like Figures 1 to 3 As shown, an embodiment of the present application provides a high-temperature reactor reciprocating fuel lifting device, including: a driving mechanism 1, a pressure-bearing shell, a support, a ball flow transmission assembly and a fuel lifting mechanism.

[0038] The support member includes a side support member 10, a top support member 3 and a bottom support member 11. Two side supports 10 are provided, both of which are arranged perpendicular to the horizontal plane. The side supports 10 are in a strip plate structure, and the two side supports 10 are parallel to each other. A guide rail for the vertical sliding of the fuel lifting mechanism is formed between the two side supports 10, which is used to support the fuel lifting mechanism and play a role in motion guidance. The fuel lifting mechanism moves in contact with the two side supports 10. The contact surface between the fuel lifting mechanism and the side supports 10 is a smooth contact surface, which makes the fuel lifting mechanism slide more smoothly. The upper end of the side support member 10 is fixedly connected to the top support member 3, and the lower end of the side support member 10 is fixedly connected to the bottom support member 11. The top support member 3 is fixedly installed at the top of the pressure shell, and the bottom support member 11 is fixedly installed at the bottom of the pressure shell. A certain space is left between the bottom support member 11 and the bottom of the pressure shell. The driving mechanism 1 connects and drives the fuel lifting mechanism to move vertically back and forth between the two side supports 10.

[0039] A plurality of groups of ball-passing holes are provided on both sides of the side support member 10 as transmission channels for the fuel balls. Each group of ball-passing holes includes a first ball-passing hole and a second ball-passing hole. In each group of ball-passing holes, the first ball-passing hole is located relatively low, and the second ball-passing hole is located relatively high. The first ball-passing hole and the second ball-passing hole are located on the two side support members 10, respectively.

[0040] The ball flow transmission assembly includes a transmission pipe 5, a ball-injection pipe 7 and a ball-outlet pipe 4, which are used to transmit the fuel balls from a low place to a high place. Each group of first ball-passing holes and second ball-passing holes are connected by an external inclined transmission pipe 5, which is used to roll the fuel balls from a high place to a low place by gravity. The bottom end of one of the side supports 10 is connected to the ball-injection pipe 7, and the transmission pipe 5 at the top end of one of the side supports 10 is connected to the ball-outlet pipe 4. The fuel balls enter the fuel lifting mechanism from the ball-injection pipe 7, are transmitted through layers of transmission pipes 5, and are finally output to the target position from the ball-outlet pipe 4 above.

[0041] A plurality of groups of ball inlets 602 and ball outlets 603 are provided on both sides of the fuel lifting mechanism. Each group of ball inlets 602 and ball outlets 603 are connected to form a ball passage 604. In each group of ball inlets 602 and ball outlets 603, the ball inlets 602 are higher than the ball outlets 603, and the ball passage 604 is inclined. In the fuel lifting mechanism, the fuel ball can roll from the ball inlet 602 to the ball outlet 603 by its own gravity. Through the vertical sliding of the fuel lifting mechanism, the ball inlet tube 7 or one of the first ball through holes is connected to one of the ball inlets 602, so that the fuel ball enters the fuel lifting mechanism from the side support 10, or one of the second ball through holes is connected to one of the ball outlets 603, so that the fuel ball is discharged from the fuel lifting mechanism to the side support 10.

[0042] The pressure-bearing shell includes a cylinder 8 and a top seal 2. The top seal 2 is detachably connected to the upper end of the cylinder 8 by bolts and other fasteners and seals, and is used to open and close the pressure-bearing shell. The side support 10, the fuel lifting mechanism and the transmission pipe 5 are all arranged in the pressure-bearing shell, and the outward ends of the ball inlet pipe 7 and the ball outlet pipe 4 are both extended out of the pressure-bearing shell.

[0043] The driving mechanism 1 is installed on the top sealing head 2 above the pressure shell. The driving mechanism 1 includes a motor and a transmission, the output end of the motor is connected to the input end of the transmission, and the output end of the transmission is connected to the lead screw 9. The top sealing head 2 and the top support 3 are provided with screw holes for the lead screw 9 to pass through. The lower end of the lead screw 9 is connected to the upper end of the fuel lifting mechanism through a bearing.

[0044] The bottom end of the fuel lifting mechanism is fixedly connected to the guide rod 12, and the bottom support member 11 is provided with a bottom guide hole for the guide rod 12 to pass through. The guide rod 12 is arranged in the space reserved between the bottom support member 11 and the pressure-bearing shell in the cylinder 8, and the guide rod 12 rises and falls with the rise and fall of the fuel lifting mechanism, and the guide rod 12 moves along the guide hole and always moves in the space, and the guide hole and the guide rod 12 play a limiting role on the fuel lifting mechanism.

[0045] In some specific embodiments, the screw hole is located at the center of the top support member 3 , and the bottom guide hole is located at the center of the bottom support member 11 .

[0046] In some specific embodiments, the transmission tube 5 is similar to an n-shaped structure, including an integrally formed goal tube, a transition tube and a ball outlet tube, and the transition tube is connected between the goal tube and the ball outlet tube. The goal tube is connected to the second ball through hole, and the ball outlet tube is connected to the first ball through hole. The transmission tube 5 is tilted as a whole, so that the fuel ball can roll from the goal tube to the ball outlet tube by its own gravity. Specifically, the goal tube, the transition tube and the ball outlet tube are all tilted, and the height of one end of the goal in each tube is higher than the height of the ball outlet end.

[0047] In some specific embodiments, Figure 3 As shown, the fuel lifting mechanism includes a plurality of sliders 6 that are detachably connected to each other in the vertical direction, each slider 6 is provided with a set of ball inlet 602 and ball outlet 603, the top slider 6 is connected to the lead screw 9 through a bearing, and the bottom slider 6 is fixedly connected to the guide rod 12. The bearing can be replaced by other rotating parts that play the same role as the bearing, so as to ensure that the lead screw 9 rotates and the fuel lifting mechanism does not rotate.

[0048] In some specific embodiments, the setting position of the ball outlet pipe 4 can be in two situations. In the first situation, the ball outlet pipe 4 can be connected to the lowest end of the top transmission pipe 5, that is, the ball outlet end of the ball outlet pipe. When the fuel ball moves with the uppermost slider 6 to the second ball through hole at the uppermost end and communicates with the ball outlet port 603 of the slider 6, the fuel ball enters the top transmission pipe 5 from the ball outlet port 603 of the slider 6, and finally rolls to the ball outlet end of the ball outlet pipe of the transmission pipe 5, and then is discharged from the ball outlet pipe 4. In the second situation, the top transmission pipe 5 does not need to be set, and the ball outlet pipe 4 can be directly connected to the second ball through hole at the uppermost end. When the fuel ball moves with the uppermost slider 6 to the second ball through hole at the uppermost end and communicates with the ball outlet port 603 of the slider 6, the fuel ball directly enters the ball outlet pipe 4 from the ball outlet port 603 of the slider 6 and is discharged.

[0049] In some specific embodiments, the driving mechanism 1 performs linear reciprocating motion and may adopt a structure that achieves the same effect as the structure of the lead screw 9, such as a sprocket chain mechanism.

[0050] In some specific embodiments, two adjacent sliding blocks 6 are connected by threads to facilitate assembly and disassembly.

[0051] In some specific embodiments, a top shaft 601 is fixedly provided at the upper end of the slider 6, and an external thread is provided on the top shaft 601. A bottom groove 605 is opened at the lower end of the slider 6, and an internal thread matching the external thread of the top shaft 601 is provided in the bottom groove 605. Two adjacent sliders 6 are connected by threads between the top shaft 601 and the bottom groove 605. The guide rod 12 is fixedly connected in the bottom groove 605 of the lowermost slider 6, and the top shaft 601 of the uppermost slider 6 is connected to the lead screw 9 through a bearing.

[0052] In some specific embodiments, the slider 6 is made of carbon fiber to reduce the weight of the action parts and save energy consumption of the driving mechanism.

[0053] In some specific embodiments, the spacing between the ball inlets 602 of two adjacent sliders 6 is equal, the spacing between the ball outlets 603 of two adjacent sliders 6 is equal, the spacing between two adjacent first ball through holes on the side support member 10 is equal, and the spacing between two adjacent second ball through holes is equal.

[0054] On the other hand, the embodiment of the present application proposes a fuel lifting method, which uses the above-mentioned high-temperature reactor reciprocating fuel lifting device. For ease of explanation, the slider 6 at the bottom of the fuel lifting mechanism is called the first slider, and the sliders upward are called the second slider, the third slider, etc., the first transmission tube 5 at the bottom is called the first transmission tube, and the second transmission tube, the third transmission tube, etc. are called upward, the first ball-passing hole at the bottom is the first first ball-passing hole, and the second first ball-passing hole, the third first ball-passing hole, etc. are called upward, the second ball-passing hole at the bottom is the first second ball-passing hole, and the second second ball-passing hole, the third second ball-passing hole, etc. are called upward.

[0055] The method specifically comprises the following steps:

[0056] S1, in the initial position, the goal tube 7 is communicated with the goal hole 602 of the first slider, and each first ball through hole is communicated with the goal hole 602 of a corresponding slider 6, that is, the first first ball through hole is communicated with the goal hole 602 of the first slider, and the second first ball through hole is communicated with the goal hole 602 of the second slider….

[0057] During loading, the first fuel ball enters from the ball-entry tube 7, passes through the pressure-bearing shell, and enters the ball-passing passage 604 of the first slider via the side support member 10;

[0058] S2, the driving mechanism 1 drives the fuel lifting mechanism to move upward as a whole, driving the first fuel ball to move upward synchronously, and when the first slider moves to communicate with the first second ball-passing hole of the side support member 10, the first fuel ball enters the first second ball-passing hole and rolls along the first transmission pipe to the first first ball-passing hole;

[0059] S3, the driving mechanism 1 drives the fuel lifting mechanism to move downward to the initial position, the first first ball-passing hole communicates with the ball-passing opening 602 of the second slider, the first fuel ball enters the ball-passing passage 604 of the second slider, and at the same time, the second fuel ball enters the ball-passing passage 604 of the first slider from the ball-passing pipe 7;

[0060] S4, the driving mechanism 1 drives the fuel lifting mechanism to move upward to the height of the fuel lifting mechanism movement in step S2, driving the first fuel ball and the second fuel ball to move upward synchronously, and when the second slider moves to communicate with the second second ball-passing hole of the side support member 10, the first fuel ball enters the second second ball-passing hole and rolls along the second transmission tube to the second first ball-passing hole; at the same time, when the first slider moves to communicate with the first second ball-passing hole of the side support member 10, the second fuel ball enters the first second ball-passing hole and rolls along the first transmission tube to the first first ball-passing hole;

[0061] S5, the driving mechanism 1 drives the fuel lifting mechanism to continuously reciprocate up and down until the fuel balls are transported to the ball outlet pipe 4, and then transported to the target position after passing through the pressure-bearing shell.

[0062] The present invention is further described below through specific examples.

[0063] Example 1

[0064] like Figures 1 to 3 As shown, a high temperature reactor reciprocating fuel lifting device comprises: a driving mechanism 1, a pressure-bearing shell, a support, a ball flow transmission assembly and a fuel lifting mechanism.

[0065] The support members include side support members 10, top support members 3 and bottom support members 11. Two side support members 10 are provided, both of which are arranged perpendicular to the horizontal plane. The side support members 10 are in the form of strip plates, and the two side support members 10 are parallel to each other. A guide rail for the vertical sliding of the fuel lifting mechanism is formed between the two side support members 10, which is used to support the fuel lifting mechanism and play a role in guiding the movement. The fuel lifting mechanism moves in contact with the two side support members 10, and the contact surface between the fuel lifting mechanism and the side support members 10 is a smooth contact surface, so that the fuel lifting mechanism slides more smoothly. The upper end of the side support member 10 is fixedly connected to the top support member 3, and the lower end of the side support member 10 is fixedly connected to the bottom support member 11. The top support member 3 is fixedly installed at the top inside the pressure shell, and the bottom support member 11 is fixedly installed at the bottom inside the pressure shell. The driving mechanism 1 is connected and drives the fuel lifting mechanism to move vertically back and forth between the two side support members 10.

[0066] A plurality of ball through holes are provided on both sides of the side support member 10 as fuel ball transmission channels. Figure 2 From the perspective of, each group of ball through holes includes a first ball through hole located on the left and a second ball through hole located on the right. In each group of ball through holes, the first ball through hole is located relatively low, and the second ball through hole is located relatively high. The first ball through holes are located on the side support member 10 on the left, and the second ball through holes are located on the side support member 10 on the right.

[0067] The ball flow transmission assembly includes a transmission pipe 5, a ball inlet pipe 7 and a ball outlet pipe 4, which are used to transmit the fuel balls from a low place to a high place. Each group of first ball through holes and second ball through holes are connected by an external inclined transmission pipe 5, which is used to roll the fuel balls from a high place to a low place by gravity. Figure 2 From the perspective of FIG. 1 , the bottom end of the left side support 10 is connected to the ball pipe 7, and the uppermost transmission pipe 5 of the left side support 10 is connected to the ball outlet pipe 4. The fuel ball enters the fuel lifting mechanism from the ball pipe 7, is transmitted through the layers of transmission pipes 5, and is finally output to the target position from the upper ball outlet pipe 4.

[0068] The fuel lifting mechanism includes a plurality of slide blocks 6 that are detachably connected to each other in the vertical direction, and each slide block 6 is provided with a set of ball inlet 602 and ball outlet 603. Figure 3 From the perspective of the left side of the slider 6, a ball inlet 602 is provided, and a ball outlet 603 is provided on the right side of the slider 6. Each group of the ball inlet 602 and the ball outlet 603 are connected to form a ball passage 604. In each group of the ball inlet 602 and the ball outlet 603, the ball inlet 602 is higher than the ball outlet 603, and the ball passage 604 is inclined. In the fuel lifting mechanism, the fuel ball can roll from the ball inlet 602 to the ball outlet 603 by its own gravity. Through the vertical sliding of the fuel lifting mechanism, the goal tube 7 is communicated with the goal port 602 of the lowest slider 6, so that the fuel ball enters from the goal tube 7 into the ball passing channel 604 of the lowest slider 6; or one of the second ball passing holes is communicated with the goal port 602 of one of the sliders 6, so that the fuel ball enters from the goal tube 7 into the ball passing channel 604 of the slider 6 at the corresponding position; or one of the second ball passing holes is communicated with the ball outlet 603 of one of the sliders 6, so that the fuel ball is discharged from the slider 6 to the side support 10.

[0069] The pressure shell includes a cylinder 8 and a top seal 2. The top seal 2 is detachably connected to the upper end of the cylinder 8 by bolts and seals, and is used to open and close the pressure shell. The side support 10, the fuel lifting mechanism and the transmission pipe 5 are all arranged in the pressure shell, and the outward ends of the inlet pipe 7 and the outlet pipe 4 are both extended out of the pressure shell. The inlet pipe 7 is used to connect the input device of the fuel ball, and the outlet pipe 4 is used to connect the core.

[0070] The driving mechanism 1 is installed on the top head 2 above the pressure shell. The driving mechanism 1 includes a motor and a transmission, the output end of the motor is connected to the input end of the transmission, the output end of the transmission is connected to the lead screw 9, and the top head 2 and the top support 3 are provided with screw holes for the lead screw 9 to pass through. The lower end of the lead screw 9 is connected to the upper end of the fuel lifting mechanism through a bearing. Specifically, the lower end of the lead screw 9 is connected to the upper end of the uppermost slider 6 through a bearing, and the screw hole is located at the center of the top support 3.

[0071] The bottom end of the fuel lifting mechanism is fixedly connected to the guide rod 12. Specifically, the upper end of the guide rod 12 is connected to the lower end of the lowermost slider 6. The bottom support member 11 is provided with a bottom guide hole for the guide rod 12 to pass through. The bottom guide hole is located at the center of the bottom support member 11. The guide rod 12 is arranged in the cylinder 8. The guide rod 12 rises and falls with the rise and fall of the fuel lifting mechanism. The guide rod 12 moves along the guide hole. The bottom guide hole and the guide rod 12 play a limiting role on the fuel lifting mechanism.

[0072] The transmission pipe 5 is similar to an n-shaped structure, including an integrally formed goal-ball pipe, a transition pipe and a ball-out pipe, and the transition pipe is connected between the goal-ball pipe and the ball-out pipe. The goal-ball pipe is connected to the second ball-passing through hole, and the ball-out pipe is connected to the first ball-passing through hole. The transmission pipe 5 is tilted as a whole, so that the fuel ball can roll from the goal-ball pipe to the ball-out pipe by its own gravity. Specifically, the goal-ball pipe, the transition pipe and the ball-out pipe are all tilted, and the height of one end of the goal in each pipe is higher than the height of the ball-out end.

[0073] The setting position of the ball outlet pipe 4 is: the ball outlet pipe 4 is connected to the lowest end of the top transmission pipe 5, that is, the ball outlet end of the ball outlet pipe fitting. When the fuel ball moves with the uppermost slider 6 to the second ball through hole at the uppermost end and communicates with the ball outlet port 603 of the slider 6, the fuel ball enters the top transmission pipe 5 from the ball outlet port 603 of the slider 6, and finally rolls to the ball outlet end of the ball outlet pipe fitting of the transmission pipe 5, and then is discharged from the ball outlet pipe 4.

[0074] Two adjacent sliders 6 are connected by threads, which can be easily disassembled. A top shaft 601 is fixedly provided at the upper end of the slider 6, and an external thread is provided on the top shaft 601. A bottom groove 605 is provided at the lower end of the slider 6, and an internal thread matching the external thread of the top shaft 601 is provided in the bottom groove 605. The two adjacent sliders 6 are connected by threads between the top shaft 601 and the bottom groove 605. The bottom groove 605 of the slider 6 at the lower end is fixedly connected to the guide rod 12, and the top shaft 601 of the slider 6 at the upper end is connected to the lead screw 9 through a bearing.

[0075] The slider 6 is made of carbon fiber to reduce the weight of the moving parts and save the energy consumption of the driving mechanism.

[0076] The spacing between the ball inlets 602 of two adjacent sliders 6 is equal, the spacing between the ball outlets 603 of two adjacent sliders 6 is equal, the spacing between two adjacent first ball through holes on the side support member 10 is equal, and the spacing between two adjacent second ball through holes is equal.

[0077] On the other hand, the embodiment of the present application proposes a fuel lifting method, which uses the above-mentioned high-temperature reactor reciprocating fuel lifting device. For ease of explanation, the slider 6 at the bottom of the fuel lifting mechanism is called the first slider, and the sliders upward are called the second slider, the third slider, etc., the first transmission tube 5 at the bottom is called the first transmission tube, and the second transmission tube, the third transmission tube, etc. are called upward, the first ball-passing hole at the bottom is the first first ball-passing hole, and the second first ball-passing hole, the third first ball-passing hole, etc. are called upward, the second ball-passing hole at the bottom is the first second ball-passing hole, and the second second ball-passing hole, the third second ball-passing hole, etc. are called upward.

[0078] The method specifically comprises the following steps:

[0079] S1, in the initial position, the goal tube 7 is communicated with the goal hole 602 of the first slider, and each first ball through hole is communicated with the goal hole 602 of a corresponding slider 6, that is, the first first ball through hole is communicated with the goal hole 602 of the first slider, and the second first ball through hole is communicated with the goal hole 602 of the second slider….

[0080] During loading, the first fuel ball enters from the ball-entry tube 7, passes through the pressure-bearing shell, and enters the ball-passing passage 604 of the first slider via the side support member 10;

[0081] S2, the driving mechanism 1 drives the fuel lifting mechanism to move upward as a whole, driving the first fuel ball to move upward synchronously, and when the first slider moves to communicate with the first second ball-passing hole of the side support member 10, the first fuel ball enters the first second ball-passing hole and rolls along the first transmission pipe to the first first ball-passing hole;

[0082] S3, the driving mechanism 1 drives the fuel lifting mechanism to move downward to the initial position, the first first ball-passing hole communicates with the ball-passing opening 602 of the second slider, the first fuel ball enters the ball-passing passage 604 of the second slider, and at the same time, the second fuel ball enters the ball-passing passage 604 of the first slider from the ball-passing pipe 7;

[0083] S4, the driving mechanism 1 drives the fuel lifting mechanism to move upward to the height of the fuel lifting mechanism movement in step S2, driving the first fuel ball and the second fuel ball to move upward synchronously, and when the second slider moves to communicate with the second second ball-passing hole of the side support member 10, the first fuel ball enters the second second ball-passing hole and rolls along the second transmission tube to the second first ball-passing hole; at the same time, when the first slider moves to communicate with the first second ball-passing hole of the side support member 10, the second fuel ball enters the first second ball-passing hole and rolls along the first transmission tube to the first first ball-passing hole;

[0084] S5, the driving mechanism 1 drives the fuel lifting mechanism to continuously reciprocate up and down until the fuel balls are transported to the ball outlet pipe 4, and then transported to the target position after passing through the pressure-bearing shell.

[0085] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0086] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0087] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0088] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0089] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0090] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A high temperature reactor reciprocating fuel lifting device, characterized in that: include: Side support members, wherein two side support members are provided, both of which are arranged perpendicular to the horizontal plane, a guide rail for the vertical sliding of the fuel lifting mechanism is formed between the two mutually parallel side support members, a plurality of groups of ball passing holes are opened on both sides of the side support members, each group of ball passing holes includes a first ball passing hole at a relatively low position and a second ball passing hole at a relatively high position, each group of the first ball passing holes and the second ball passing holes are connected by an external inclined transmission pipe, the first ball passing holes and the second ball passing holes are respectively located on the two side support members, the side support member near the bottom end is connected to the ball pipe, and the transmission pipe at the uppermost end of the side support member is connected to the ball outlet pipe; A fuel lifting mechanism, wherein a plurality of groups of ball inlets and ball outlets are provided on both sides of the fuel lifting mechanism, each group of ball inlets and ball outlets are connected to form a ball passage, and in each group of ball inlets and ball outlets, the ball inlet is higher than the ball outlet, and the vertical sliding of the fuel lifting mechanism enables the ball tube or one of the first ball through holes to communicate with one of the ball inlets, or enables one of the second ball through holes to communicate with one of the ball outlets; A driving mechanism, the driving mechanism is connected to and drives the fuel lifting mechanism to move vertically back and forth between the two side supports; It also includes a pressure-bearing shell, wherein the side support, the fuel lifting mechanism and the transmission pipe are all arranged in the pressure-bearing shell, the outward ends of the ball pipe and the ball outlet pipe are both extended out of the pressure-bearing shell, and the driving mechanism is installed on the top head above the pressure-bearing shell; The driving mechanism drives the fuel lifting mechanism to continuously reciprocate up and down until the fuel balls are transported to the ball outlet pipe, passed through the pressure-bearing shell, and then transported to the target position.

2. The high temperature reactor reciprocating fuel lifting device according to claim 1, characterized in that: The upper end of the side support member is fixedly connected to the top support member, the lower end of the side support member is fixedly connected to the bottom support member, the top support member is fixedly installed at the top inside the pressure shell, the bottom support member is fixedly installed at the bottom inside the pressure shell, the bottom end of the fuel lifting mechanism is fixedly connected to the guide rod, and the bottom support member is provided with a bottom guide hole for the guide rod to pass through.

3. The high temperature reactor reciprocating fuel lifting device according to claim 2, characterized in that: The driving mechanism includes a motor and a transmission, the output end of the motor is connected to the input end of the transmission, the output end of the transmission is connected to the screw, the top head and the top support are provided with screw holes for the screw to pass through, and the lower end of the screw is connected to the upper end of the fuel lifting mechanism through a bearing.

4. The high temperature reactor reciprocating fuel lifting device according to claim 3, characterized in that: The fuel lifting mechanism includes a plurality of sliders which are detachably connected to each other in the vertical direction, each slider is provided with a set of ball inlets and ball outlets, the uppermost slider is connected to the lead screw via a bearing, and the lowermost slider is fixedly connected to the guide rod.

5. The high temperature reactor reciprocating fuel lifting device according to claim 4, characterized in that: Two adjacent sliding blocks are connected via threads.

6. The high temperature reactor reciprocating fuel lifting device according to claim 5, characterized in that: A top shaft is fixedly provided at the upper end of the slider, and an external thread is provided on the top shaft. A bottom groove is opened at the lower end of the slider, and an internal thread matching the external thread of the top shaft is provided in the bottom groove. Two adjacent sliders are connected by threads between the top shaft and the bottom groove. A guide rod is fixedly connected in the bottom groove of the slider at the lower end, and the top shaft of the slider at the upper end is connected to the lead screw through a bearing.

7. The high temperature reactor reciprocating fuel lifting device according to any one of claims 4 to 6, characterized in that: The sliding block is made of carbon fiber.

8. The high temperature reactor reciprocating fuel lifting device according to any one of claims 4 to 6, characterized in that: The spacing between the ball inlets of two adjacent sliders is equal, the spacing between the ball outlets of two adjacent sliders is equal, the spacing between two adjacent first ball through holes on the side support is equal, and the spacing between two adjacent second ball through holes is equal.

9. A fuel upgrading method, characterized in that: The high temperature reactor reciprocating fuel lifting device according to any one of claims 1 to 8 comprises the following steps: S1, in the initial position, the goal tube is connected to the goal port of the slider at the bottom, and each first ball-passing hole is connected to the goal port of a corresponding slider. During loading, the first fuel ball enters from the goal tube, passes through the pressure-bearing shell, and enters the ball-passing channel of the slider at the bottom of the fuel lifting mechanism through the side support member; S2, the driving mechanism drives the fuel lifting mechanism to move upward, driving the first fuel ball to move upward synchronously, and when the slider at the lower end moves to communicate with the first second ball through hole of the side support member, the first fuel ball enters the first second ball through hole and rolls along the transmission pipe to the first first ball through hole; S3, the driving mechanism drives the fuel lifting mechanism to move downward to the initial position, the first ball-passing hole is connected with the ball-passing hole of the second slider, the first fuel ball enters the ball-passing channel of the second slider, and at the same time, the second fuel ball enters the ball-passing channel of the slider at the lower end from the ball-passing tube; S4, the driving mechanism drives the fuel lifting mechanism to move upward, driving the first fuel ball and the second fuel ball to move upward synchronously, and when the second slider moves to communicate with the second second ball through hole of the side support, the first fuel ball enters the second second ball through hole and rolls along the transmission pipe to the second first ball through hole; at the same time, when the lowermost slider moves to communicate with the first second ball through hole of the side support, the second fuel ball enters the first second ball through hole and rolls along the transmission pipe to the first first ball through hole; S5, the driving mechanism drives the fuel lifting mechanism to continuously reciprocate up and down until the fuel balls are transported to the ball outlet pipe, pass through the pressure-bearing shell, and are transported to the target position.

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