CN115206564B - A high temperature reactor reciprocating fuel lifting device and a fuel lifting method - Google Patents
A high temperature reactor reciprocating fuel lifting device and a fuel lifting method Download PDFInfo
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- CN115206564B CN115206564B CN202210886236.4A CN202210886236A CN115206564B CN 115206564 B CN115206564 B CN 115206564B CN 202210886236 A CN202210886236 A CN 202210886236A CN 115206564 B CN115206564 B CN 115206564B
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- 239000000446 fuel Substances 0.000 title claims abstract description 211
- 238000000034 method Methods 0.000 title claims abstract description 14
- 230000007246 mechanism Effects 0.000 claims abstract description 120
- 230000005540 biological transmission Effects 0.000 claims abstract description 47
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 4
- 239000004917 carbon fiber Substances 0.000 claims description 4
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 238000007789 sealing Methods 0.000 abstract description 16
- 239000001307 helium Substances 0.000 abstract description 4
- 229910052734 helium Inorganic materials 0.000 abstract description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 abstract description 4
- 238000012546 transfer Methods 0.000 description 10
- 230000005484 gravity Effects 0.000 description 6
- 230000007704 transition Effects 0.000 description 6
- 230000009286 beneficial effect Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002915 spent fuel radioactive waste Substances 0.000 description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Classifications
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/19—Reactor parts specifically adapted to facilitate handling, e.g. to facilitate charging or discharging of fuel elements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Transmission Devices (AREA)
Abstract
本发明提出一种高温堆往复式燃料提升装置及燃料提升方法，燃料提升装置包括侧支撑件，燃料提升机构和驱动机构。两个侧支撑件之间形成用于燃料提升机构竖直滑动的导轨，侧支撑件的两侧开设有若干组过球通孔，侧支撑件连接进球管和出球管。驱动机构驱动燃料提升机构不断上下往复运动，直至将燃料球输送至出球管，穿过承压壳体后输送至目标位置。本发明采用机械提升的方法将燃料元件从低处输送至高处，不需要配置复杂的气力输送系统，有利于简化系统配置，避免复杂系统带来的设备故障和氦气密封难题；本发明具备垂直布置的条件，提高燃料传输效率；本发明采用往复式原理来输送燃料元件，有利于提高设备的可靠性。
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
The invention relates to the technical field of reactor engineering, in particular to a high-temperature reactor reciprocating fuel lifting device and a fuel lifting method.
Background
The reactor core of the pebble-bed high-temperature gas cooled reactor is formed by stacking pebble-shaped fuel elements, and the non-shutdown refueling function of the reactor can be realized by utilizing the favorable geometric shapes of the pebble-shaped fuel elements. During operation of the reactor, the fuel elements in the active region of the core flow from top to bottom by gravity and are discharged from the bottom discharge tube of the pressure vessel. The discharged fuel elements firstly enter a reactor core unloading device, the reactor core unloading device conveys the fuel elements to a downstream broken ball separating device after singulating, after the broken balls are separated, the broken balls fall into a broken ball tank, and the intact fuel elements enter a burnup measuring and positioning device for burnup measurement. And the spent fuel element reaching the target burning depth is conveyed to a spent fuel unloading pipeline and finally is filled into a spent fuel storage tank for storage. The fuel elements which do not reach the target burnup are conveyed to the reactor core recirculation pipeline, and after reaching the lowest point of the gravity ball falling pipeline, the fuel elements are conveyed back to the reactor core in a pneumatic lifting or mechanical lifting mode. The pneumatic conveying mode is adopted to lift the fuel element, a complex pneumatic conveying system is required to be configured, and because of the large number of pipelines and equipment, the difficult problem of sealing the helium is solved, and meanwhile, the fuel lifting efficiency is greatly limited due to the influence of the turbulent flow characteristic of the fluid. Therefore, research into mechanical lifting means to transport fuel elements is of great importance in simplifying the configuration of the fuel handling system and in improving the transport efficiency of the fuel elements.
Disclosure of Invention
The invention aims to provide a high-temperature pile reciprocating type fuel lifting device and a fuel lifting method, which achieve the purposes of simplifying the configuration of a fuel loading and unloading system and improving the conveying efficiency of fuel elements, thereby improving the running stability and the economical efficiency of the fuel loading and unloading system.
In one aspect, the embodiment of the application provides a high-temperature pile reciprocating type fuel lifting device, which comprises a side supporting piece, a fuel lifting mechanism and a driving mechanism.
The side support piece is provided with two, all perpendicular to horizontal plane sets up, form the guide rail that is used for vertical gliding of fuel hoist mechanism between two mutually parallel side support pieces, a plurality of groups of ball through-holes have been seted up to side support piece's both sides, every group ball through-hole is including the first ball through-hole that crosses of position relatively lower and the second ball through-hole that crosses of position relatively higher, pass through external slope transmission union coupling between every group first ball through-hole and the second ball through-hole, first ball through-hole and second cross the ball through-hole and lie in respectively on two side support pieces, the side support piece is by the position connection of bottom advance the bulb, the transmission union coupling of the uppermost of side support piece goes out the bulb.
The two sides of the fuel lifting mechanism are provided with a plurality of groups of ball inlets and ball outlets, each group of ball inlets and ball outlets are communicated with each other to form a ball passing channel, the ball inlets are higher than the ball outlets in each group of ball inlets and ball outlets, and the ball inlet pipe or one of the first ball passing through holes is communicated with one of the ball inlets or one of the second ball passing through holes is communicated with one of the ball outlets through the vertical sliding of the fuel lifting mechanism.
The driving mechanism is connected with and drives the fuel lifting mechanism to vertically reciprocate between the two side supporting pieces.
According to the high-temperature pile reciprocating type fuel lifting device, a mechanical lifting method is adopted to convey the fuel element from a low position to a high position, a complex pneumatic conveying system is not required to be configured, system configuration is simplified, and equipment failure and helium sealing problems caused by a complex system are avoided.
The high-temperature pile reciprocating type fuel lifting device has the condition of vertical arrangement, is beneficial to shortening a fuel transmission path and improving fuel transmission efficiency.
In some embodiments, the fuel lifting device further comprises a pressure-bearing shell, the side supporting pieces, the fuel lifting mechanism and the transmission pipe are all arranged in the pressure-bearing shell, the outward ends of the ball inlet pipe and the ball outlet pipe extend out of the pressure-bearing shell, and the driving mechanism is arranged on a top sealing head above the pressure-bearing shell.
In some embodiments, the upper end of the side support is fixedly connected with a top support, the lower end of the side support is fixedly connected with a bottom support, the top support is fixedly installed above the inside of the pressure-bearing shell, the bottom support is fixedly installed below the inside of the pressure-bearing shell, the bottom end of the fuel lifting mechanism is fixedly connected with a guide rod, and the bottom support is provided with a bottom guide hole for the guide rod to penetrate through.
In some embodiments, the driving mechanism comprises a motor and a driver, wherein the output end of the motor is connected with the input end of the driver, the output end of the driver is connected with a screw rod, screw holes for the screw rod to penetrate are formed in the top sealing head and the top supporting piece, and the lower end of the screw rod is connected with the upper end of the fuel lifting mechanism through a bearing.
In some embodiments, the fuel lifting mechanism comprises a plurality of sliding blocks which are mutually detachably connected in the vertical direction, a group of ball inlet and ball outlet are formed in each sliding block, the sliding block at the uppermost end is connected with the lead screw through a bearing, and the sliding block at the lowermost end is fixedly connected with the guide rod.
In some embodiments, two adjacent sliders are connected by threads.
In some embodiments, the upper end of the sliding block is fixedly provided with a top shaft, the top shaft is provided with external threads, the lower end of the sliding block is provided with a bottom groove, the bottom groove is internally provided with internal threads matched with the external threads of the top shaft, two adjacent sliding blocks are connected with the bottom groove through threads, the bottom groove of the sliding block at the lowest end is fixedly connected with a guide rod, and the top shaft of the sliding block at the uppermost end is connected with a lead screw through a bearing.
In some embodiments, the slider is made of carbon fiber. The weight of the action part is reduced, and the energy consumption of the driving mechanism is saved.
In some embodiments, the pitch of the ball inlets of two adjacent sliders is equal, the pitch of the ball outlets of two adjacent sliders is equal, the pitch of two adjacent first ball passing through holes on the side support is equal, and the pitch of two adjacent second ball passing through holes is equal.
Another aspect of the embodiments of the present application provides a fuel lifting method, using the above-mentioned high temperature stack reciprocating fuel lifting device, including the following steps:
S1, in the initial position, a ball inlet pipe is communicated with a ball inlet of a sliding block at the lowest end, each first ball passing through hole is communicated with a ball inlet of a corresponding sliding block, and when the fuel lifting mechanism is charged, a first fuel ball enters from the ball inlet pipe, passes through a pressure-bearing shell and enters a ball passing channel of the sliding block at the lowest end in the fuel lifting mechanism through a side supporting piece;
S2, the driving mechanism drives the fuel lifting mechanism to move upwards to drive the first fuel ball to move upwards synchronously, and when the sliding block at the lowest end moves to be communicated with the first ball passing through hole and the second ball passing through hole of the side support piece, the first fuel ball enters the first ball passing through hole and the second ball passing through hole and rolls to the first ball passing through hole along the transmission pipe;
S3, the driving mechanism drives the fuel lifting mechanism to move downwards to an initial position, the first ball passing through hole is communicated with the ball inlet of the second sliding block, the first fuel ball enters the ball passing channel of the second sliding block, and meanwhile, the second fuel ball enters the ball passing channel of the sliding block at the lowest end from the ball inlet pipe;
S4, the driving mechanism drives the fuel lifting mechanism to move upwards to drive the first fuel ball and the second fuel ball to move upwards synchronously, when the second sliding block moves to be communicated with the second ball passing through hole of the side support piece, the first fuel ball enters the second ball passing through hole and rolls to the second first ball passing through hole along the transmission pipe;
And S5, the driving mechanism drives the fuel lifting mechanism to continuously reciprocate up and down until the fuel ball is conveyed to the ball outlet pipe, passes through the pressure-bearing shell and is conveyed to the target position.
The beneficial effects of the invention are as follows:
(1) According to the high-temperature pile reciprocating type fuel lifting device, a mechanical lifting method is adopted to convey a fuel element from a low position to a high position, a complex pneumatic conveying system is not required to be configured, system configuration is simplified, and equipment failure and helium sealing problems caused by a complex system are avoided;
(2) The high-temperature pile reciprocating type fuel lifting device has the condition of vertical arrangement, is beneficial to shortening a fuel transmission path and improving fuel transmission efficiency;
(3) The high-temperature pile reciprocating type fuel lifting device adopts the reciprocating principle to convey fuel elements, has simple structure and few matching parts, and is beneficial to improving the reliability of equipment.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and may be better understood from the following description of embodiments with reference to the accompanying drawings,
Wherein:
FIG. 1 is a schematic view of a high temperature stack reciprocating fuel lifting device in an embodiment of the application;
FIG. 2 is a schematic view of the internal structure of a high temperature stack reciprocating fuel lifting device in an embodiment of the application;
FIG. 3 is a schematic view of a slider according to an embodiment of the present application;
Reference numerals:
1-driving mechanism, 2-top head, 3-top support piece, 4-ball outlet pipe, 5-transmission pipe, 6-slide block, 601-top shaft, 602-ball inlet, 603-ball outlet, 604-ball passing channel, 605-bottom groove, 7-ball inlet pipe, 8-cylinder, 9-screw rod, 10-side support piece, 11-bottom support piece and 12-guide rod.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the drawings are illustrative and intended to explain the present invention and should not be construed as limiting the invention.
A high temperature stack reciprocating fuel lifting apparatus according to an embodiment of the present invention will be described with reference to the accompanying drawings.
As shown in fig. 1 to 3, an aspect of the present application provides a reciprocating fuel lifting device for a thermopile, which includes a driving mechanism 1, a pressure-bearing housing, a supporting member, a ball flow transmission assembly and a fuel lifting mechanism.
The support comprises side support pieces 10, a top support piece 3 and a bottom support piece 11, wherein the side support pieces 10 are arranged in two, are perpendicular to the horizontal plane, the side support pieces 10 are of a strip-shaped plate structure, and the two side support pieces 10 are parallel to each other. A guide rail for vertical sliding of the fuel lifting mechanism is formed between the two side supporting pieces 10 and used for supporting the fuel lifting mechanism and playing a role of motion guiding, the fuel lifting mechanism is attached to the two side supporting pieces 10 to move, and the contact surface between the fuel lifting mechanism and the side supporting pieces 10 is a smooth contact surface, so that the fuel lifting mechanism slides more smoothly. The upper end fixed connection top support piece 3 of side support piece 10, the lower extreme fixed connection bottom support piece 11 of side support piece 10, top support piece 3 fixed mounting is in the top of pressure-bearing casing, and bottom support piece 11 fixed mounting is in the below in the pressure-bearing casing, leaves certain space between bottom support piece 11 and the bottom of pressure-bearing casing. The driving mechanism 1 is connected to and drives the fuel lifting mechanism to reciprocate vertically between the two side supports 10.
A plurality of groups of ball passing through holes are formed in two sides of the side supporting piece 10 and serve as transmission channels of fuel balls, each group of ball passing through holes comprises a first ball passing through hole and a second ball passing through hole, and in each group of ball passing through holes, the position of the first ball passing through hole is relatively low, and the position of the second ball passing through hole is relatively high. The first ball passing through hole and the second ball passing through hole are respectively located on the two side supporters 10.
The ball flow transmission assembly comprises a transmission pipe 5, a ball inlet pipe 7 and a ball outlet pipe 4, and is used for transmitting the fuel balls from a low place to a high place. Each group of first ball passing through holes and second ball passing through holes are connected through an external inclined transmission pipe 5 and are used for rolling the fuel balls from high to low through gravity. The lower end of one of the side supports 10 is connected to the inlet bulb 7, and the uppermost transfer tube 5 of one of the side supports 10 is connected to the outlet bulb 4. The fuel ball enters the fuel lifting mechanism from the ball inlet pipe 7, is transmitted through the layer-by-layer transmission pipe 5, and finally is output to a target position from the ball outlet pipe 4 above.
A plurality of groups of ball inlets 602 and ball outlets 603 are formed on two sides of the fuel lifting mechanism, each group of ball inlets 602 and ball outlets 603 are communicated with each other to form a ball passing channel 604, and 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 passing channel 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 weight. By vertical sliding of the fuel lifting mechanism, the ball inlet pipe 7 or one of the first ball passing through holes is communicated with one of the ball inlet openings 602, so that the fuel balls enter the fuel lifting mechanism from the side support 10, or one of the second ball passing through holes is communicated with one of the ball outlet openings 603, so that the fuel balls are discharged from the fuel lifting mechanism to the side support 10.
The pressure-bearing shell comprises a cylinder 8 and a top sealing head 2, wherein the top sealing head 2 is detachably connected to the upper end of the cylinder 8 through fasteners such as bolts and sealing elements and is used for opening and closing 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 extend out of the pressure-bearing shell.
The driving mechanism 1 is arranged on the top sealing head 2 above the pressure-bearing shell. The driving mechanism 1 comprises a motor and a driver, wherein the output end of the motor is connected with the input end of the driver, the output end of the driver is connected with a screw rod 9, and screw holes for the screw rod 9 to penetrate are formed in the top sealing head 2 and the top supporting piece 3. The lower end of the screw rod 9 is connected to the upper end of the fuel lifting mechanism through a bearing.
The bottom end of the fuel lifting mechanism is fixedly connected with a guide rod 12, and a bottom guide hole for the guide rod 12 to penetrate is formed in the bottom supporting piece 11. The guide rod 12 is arranged in a space reserved between the support piece 11 in the cylinder 8 and the pressure-bearing shell, the guide rod 12 is lifted along with the lifting of the fuel lifting mechanism, 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.
In some specific embodiments, the screw hole is located at the center of the top support 3 and the bottom guide hole is located at the center of the bottom support 11.
In some specific embodiments, the transmission pipe 5 has an n-shaped structure, including an integrally formed ball inlet pipe, a transition pipe and a ball outlet pipe, and the transition pipe is connected between the ball inlet pipe and the ball outlet pipe. The ball inlet pipe fitting is communicated with the second ball passing through hole, and the ball outlet pipe fitting is communicated with the first ball passing through hole. The transmission pipe 5 is arranged in an overall inclined way, so that the fuel balls can roll from the ball inlet pipe fitting to the ball outlet pipe fitting through self gravity. Specifically, the ball inlet pipe fitting, the transition pipe fitting and the ball outlet pipe fitting are all obliquely arranged, and the height of one end of a ball inlet in each pipe fitting is higher than that of one end of a ball outlet.
In some specific embodiments, as shown in fig. 3, the fuel lifting mechanism includes a plurality of sliding blocks 6 detachably connected to each other in a vertical direction, each sliding block 6 is provided with a group of ball inlets 602 and ball outlets 603, the uppermost sliding block 6 is connected with a screw rod 9 through a bearing, and the lowermost sliding block 6 is fixedly connected with a guide rod 12. The bearing can be replaced by other rotating parts which have the same function as the bearing, so that the screw rod 9 is guaranteed to rotate, and the fuel lifting mechanism does not rotate.
In some specific embodiments, the ball outlet tube 4 may be disposed at two positions, in which the first case is that the ball outlet tube 4 may be connected to the lowest end of the top delivery tube 5, that is, the ball outlet end of the ball outlet tube member, and when the fuel ball moves with the uppermost slider 6 to the second ball passing through hole at the uppermost end to be communicated with the ball outlet 603 of the slider 6, the fuel ball enters the top delivery tube 5 from the ball outlet 603 of the slider 6, finally rolls to the ball outlet end of the ball outlet tube member of the delivery tube 5, and then is discharged from the ball outlet tube 4. In the second case, the top transmission pipe 5 is not required to be arranged, the ball outlet pipe 4 is directly connected to the uppermost second ball passing through hole, and when the fuel ball moves along with the uppermost sliding block 6 to the position that the uppermost second ball passing through hole is communicated with the ball outlet 603 of the sliding block 6, the fuel ball directly enters the ball outlet pipe 4 from the ball outlet 603 of the sliding block 6 and is discharged.
In some specific embodiments, the driving mechanism 1 performs a linear reciprocating motion, and a structure that achieves the same effect as the structure of the lead screw 9, such as a sprocket-chain mechanism, etc., may be adopted.
In some specific embodiments, two adjacent sliding blocks 6 are connected through threads, so that the sliding blocks can be conveniently disassembled.
In some specific embodiments, a top shaft 601 is fixedly arranged at the upper end of the sliding block 6, external threads are arranged on the top shaft 601, a bottom groove 605 is arranged at the lower end of the sliding block 6, internal threads matched with the external threads of the top shaft 601 are arranged in the bottom groove 605, two adjacent sliding blocks 6 are connected with each other through threads between the top shaft 601 and the bottom groove 605, a guide rod 12 is fixedly connected in the bottom groove 605 of the sliding block 6 at the lowest end, and the top shaft 601 of the sliding block 6 at the uppermost end is connected with a lead screw 9 through a bearing.
In some embodiments, the slider 6 is made of carbon fiber. The weight of the action part is reduced, and the energy consumption of the driving mechanism is saved.
In some specific embodiments, the ball inlets 602 of two adjacent sliders 6 are spaced equally, the ball outlets 603 of two adjacent sliders 6 are spaced equally, the two first ball passing holes on the side support 10 are spaced equally, and the two second ball passing holes are spaced equally.
Another aspect of the embodiments of the present application provides a fuel lifting method, which uses the above-mentioned high-temperature stack reciprocating fuel lifting device. For convenience of description, the bottom-most slider 6 of the fuel lifting mechanism is referred to as a first slider, which is sequentially referred to as a second slider and a third slider, and the bottom-most first transfer tube 5 is referred to as a first transfer tube, which is sequentially referred to as a second transfer tube and a third transfer tube, and the bottom-most first ball through hole is referred to as a first ball through hole, which is sequentially referred to as a second first ball through hole and a third first ball through hole, and the bottom-most second ball through hole is referred to as a first second ball through hole, which is sequentially referred to as a second ball through hole and a third second ball through hole.
The method specifically comprises the following steps:
S1, in the initial position, the ball inlet pipe 7 is communicated with the ball inlet 602 of the first sliding block, each first ball passing through hole is communicated with the ball inlet 602 of the corresponding one sliding block 6, namely, the first ball passing through hole is communicated with the ball inlet 602 of the first sliding block, and the second first ball passing through hole is communicated with the ball inlet 602 of the second sliding block.
During loading, a first fuel ball enters from the ball inlet pipe 7, passes through the pressure-bearing shell and enters the ball passing channel 604 of the first sliding block through the side supporting piece 10;
S2, the driving mechanism 1 drives the whole fuel lifting mechanism to move upwards to drive the first fuel ball to synchronously move upwards, and when the first sliding block moves to be communicated with the first and second ball passing through holes of the side supporting piece 10, the first fuel ball enters the first and second ball passing through holes and rolls to the first ball passing through hole along the first transmission pipe;
S3, the driving mechanism 1 drives the fuel lifting mechanism to move downwards to an initial position, a first ball passing through hole is communicated with a ball inlet 602 of the second sliding block, a first fuel ball enters a ball passing channel 604 of the second sliding block, and at the same time, a second fuel ball enters the ball passing channel 604 of the first sliding block from a ball inlet pipe 7;
S4, driving the fuel lifting mechanism to move upwards to the height of the fuel lifting mechanism in the step S2, driving the first fuel ball and the second fuel ball to move upwards synchronously, and enabling the first fuel ball to enter the second ball through hole and roll to the second first ball through hole along the second transmission pipe when the second slider moves to be communicated with the second ball through hole of the side support 10, and enabling the second fuel ball to enter the first second ball through hole and roll to the first ball through hole along the first transmission pipe when the first slider moves to be communicated with the first second ball through hole of the side support 10;
S5, the driving mechanism 1 drives the fuel lifting mechanism to continuously reciprocate up and down until the fuel ball is conveyed to the ball outlet pipe 4, passes through the pressure-bearing shell and then is conveyed to the target position.
The invention is further illustrated by the following specific examples.
Example 1
As shown in figures 1-3, the high-temperature pile reciprocating type fuel lifting device comprises a driving mechanism 1, a pressure-bearing shell, a supporting piece, a ball flow transmission assembly and a fuel lifting mechanism.
The support comprises side support pieces 10, a top support piece 3 and a bottom support piece 11, wherein the side support pieces 10 are arranged in two, are perpendicular to the horizontal plane, the side support pieces 10 are of a strip-shaped plate structure, and the two side support pieces 10 are parallel to each other. A guide rail for vertical sliding of the fuel lifting mechanism is formed between the two side supporting pieces 10 and used for supporting the fuel lifting mechanism and playing a role of motion guiding, the fuel lifting mechanism is attached to the two side supporting pieces 10 to move, and the contact surface between the fuel lifting mechanism and the side supporting pieces 10 is a smooth contact surface, so that the fuel lifting mechanism slides more smoothly. The upper end of the side support piece 10 is fixedly connected with the top support piece 3, the lower end of the side support piece 10 is fixedly connected with the bottom support piece 11, the top support piece 3 is fixedly arranged above the inside of the pressure-bearing shell, and the bottom support piece 11 is fixedly arranged below the inside of the pressure-bearing shell. The driving mechanism 1 is connected to and drives the fuel lifting mechanism to reciprocate vertically between the two side supports 10.
A plurality of sets of ball passing through holes are formed in both sides of the side support 10 as transmission channels for fuel balls, and each set of ball passing through holes includes a first ball passing through hole located on the left side and a second ball passing through hole located on the right side from the perspective of fig. 2, and in each set of ball passing through holes, the position of the first ball passing through hole is relatively low, and the position of the second ball passing through hole is relatively high. The first ball passing through holes are all positioned on the left side supporting piece 10, and the second ball passing through holes are all positioned on the right side supporting piece 10.
The ball flow transmission assembly comprises a transmission pipe 5, a ball inlet pipe 7 and a ball outlet pipe 4, and is used for transmitting the fuel balls from a low place to a high place. Each group of first ball passing through holes and second ball passing through holes are connected through an external inclined transmission pipe 5 and are used for rolling the fuel balls from high to low through gravity. From the perspective of fig. 2, the lower end of the left side support 10 is connected to the inlet bulb 7, and the uppermost transfer tube 5 of the left side support 10 is connected to the outlet bulb 4. The fuel ball enters the fuel lifting mechanism from the ball inlet pipe 7, is transmitted through the layer-by-layer transmission pipe 5, and finally is output to a target position from the ball outlet pipe 4 above.
The fuel lifting mechanism comprises a plurality of sliding blocks 6 which are mutually detachably connected in the vertical direction, and each sliding block 6 is provided with a group of ball inlets 602 and ball outlets 603. Specifically, from the perspective of fig. 3, the left side of the slider 6 is provided with a ball inlet 602, and the right side of the slider 6 is provided with a ball outlet 603. Each group of ball inlet 602 and ball outlet 603 are communicated with each other to form a ball passing channel 604, and in each group of ball inlet 602 and ball outlet 603, the ball inlet 602 is higher than the ball outlet 603, and the ball passing channel 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 weight. The fuel ball is discharged from the slide block 6 to the side support 10 by making the ball inlet pipe 7 communicate with the ball inlet 602 of the slide block 6 at the lowest end by vertical sliding of the fuel lifting mechanism, making the fuel ball enter the ball passing channel 604 of the slide block 6 at the lowest end from the ball inlet pipe 7, or making one of the second ball passing through holes communicate with the ball inlet 602 of one of the slide blocks 6, making the fuel ball enter the ball passing channel 604 of the slide block 6 at the corresponding position from the ball inlet pipe 7, or making one of the second ball passing through holes communicate with the ball outlet 603 of one of the slide blocks 6.
The pressure-bearing shell comprises a cylinder 8 and a top sealing head 2, and the top sealing head 2 is detachably connected to the upper end of the cylinder 8 through bolts and sealing pieces and used for opening and closing 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 extend out of the pressure-bearing shell. The ball inlet pipe 7 is used for connecting with an input device of fuel balls, and the ball outlet pipe 4 is used for connecting with a reactor core.
The driving mechanism 1 is arranged on the top sealing head 2 above the pressure-bearing shell. The driving mechanism 1 comprises a motor and a driver, wherein the output end of the motor is connected with the input end of the driver, the output end of the driver is connected with a screw rod 9, and screw holes for the screw rod 9 to penetrate are formed in the top sealing head 2 and the top supporting piece 3. The lower extreme of lead screw 9 passes through the bearing and connects to the upper end of fuel hoist mechanism, and specifically, the lower extreme of lead screw 9 passes through the bearing and connects to the upper end of the slider 6 in the uppermost, and the screw is located top support 3 center department.
The bottom end of the fuel lifting mechanism is fixedly connected with a guide rod 12, and specifically, the upper end of the guide rod 12 is connected with the lower end of the sliding block 6 at the lowest end. The bottom support 11 is provided with a bottom guide hole for the guide rod 12 to penetrate through, and the bottom guide hole is positioned at the center of the bottom support 11. The guide rod 12 is arranged in the cylinder 8, the guide rod 12 is lifted along with the lifting of the fuel lifting mechanism, the guide rod 12 moves along the guide hole, and the bottom guide hole and the guide rod 12 play a limiting role on the fuel lifting mechanism.
The transmission pipe 5 is of an n-shaped structure and comprises an integrally formed ball inlet pipe fitting, a transition pipe fitting and a ball outlet pipe fitting, wherein the transition pipe fitting is connected between the ball inlet pipe fitting and the ball outlet pipe fitting. The ball inlet pipe fitting is communicated with the second ball passing through hole, and the ball outlet pipe fitting is communicated with the first ball passing through hole. The transmission pipe 5 is arranged in an overall inclined way, so that the fuel balls can roll from the ball inlet pipe fitting to the ball outlet pipe fitting through self gravity. Specifically, the ball inlet pipe fitting, the transition pipe fitting and the ball outlet pipe fitting are all obliquely arranged, and the height of one end of a ball inlet in each pipe fitting is higher than that of one end of a ball outlet.
The ball outlet pipe 4 is arranged at the position that the ball outlet pipe 4 is connected to the lowest end of the transmission pipe 5 at the top, namely the ball outlet end of the ball outlet pipe piece, when the fuel ball moves along with the uppermost sliding block 6 to the second ball passing through hole at the uppermost end to be communicated with the ball outlet 603 of the sliding block 6, the fuel ball enters the transmission pipe 5 at the top from the ball outlet 603 of the sliding block 6, finally rolls to the ball outlet end of the ball outlet pipe piece of the transmission pipe 5, and is discharged from the ball outlet pipe 4.
The adjacent two sliding blocks 6 are connected through threads, so that the assembly and disassembly can be facilitated. The upper ends of the sliding blocks 6 are fixedly provided with top shafts 601, the top shafts 601 are provided with external threads, the lower ends of the sliding blocks 6 are provided with bottom grooves 605, the bottom grooves 605 are internally provided with internal threads matched with the external threads of the top shafts 601, two adjacent sliding blocks 6 are connected with the bottom grooves 605 through threads, the bottom grooves 605 of the sliding blocks 6 at the bottommost end are fixedly connected with guide rods 12, and the top shafts 601 of the sliding blocks 6 at the uppermost end are connected with lead screws 9 through bearings.
The slide block 6 is made of carbon fiber. The weight of the action part is reduced, and the energy consumption of the driving mechanism is saved.
The pitch of the ball inlets 602 of two adjacent sliding blocks 6 is equal, the pitch of the ball outlets 603 of two adjacent sliding blocks 6 is equal, the pitch of two adjacent first ball passing through holes on the side supporting piece 10 is equal, and the pitch of two adjacent second ball passing through holes is equal.
Another aspect of the embodiments of the present application provides a fuel lifting method, which uses the above-mentioned high-temperature stack reciprocating fuel lifting device. For convenience of description, the bottom-most slider 6 of the fuel lifting mechanism is referred to as a first slider, which is sequentially referred to as a second slider and a third slider, and the bottom-most first transfer tube 5 is referred to as a first transfer tube, which is sequentially referred to as a second transfer tube and a third transfer tube, and the bottom-most first ball through hole is referred to as a first ball through hole, which is sequentially referred to as a second first ball through hole and a third first ball through hole, and the bottom-most second ball through hole is referred to as a first second ball through hole, which is sequentially referred to as a second ball through hole and a third second ball through hole.
The method specifically comprises the following steps:
S1, in the initial position, the ball inlet pipe 7 is communicated with the ball inlet 602 of the first sliding block, each first ball passing through hole is communicated with the ball inlet 602 of the corresponding one sliding block 6, namely, the first ball passing through hole is communicated with the ball inlet 602 of the first sliding block, and the second first ball passing through hole is communicated with the ball inlet 602 of the second sliding block.
During loading, a first fuel ball enters from the ball inlet pipe 7, passes through the pressure-bearing shell and enters the ball passing channel 604 of the first sliding block through the side supporting piece 10;
S2, the driving mechanism 1 drives the whole fuel lifting mechanism to move upwards to drive the first fuel ball to synchronously move upwards, and when the first sliding block moves to be communicated with the first and second ball passing through holes of the side supporting piece 10, the first fuel ball enters the first and second ball passing through holes and rolls to the first ball passing through hole along the first transmission pipe;
S3, the driving mechanism 1 drives the fuel lifting mechanism to move downwards to an initial position, a first ball passing through hole is communicated with a ball inlet 602 of the second sliding block, a first fuel ball enters a ball passing channel 604 of the second sliding block, and at the same time, a second fuel ball enters the ball passing channel 604 of the first sliding block from a ball inlet pipe 7;
S4, driving the fuel lifting mechanism to move upwards to the height of the fuel lifting mechanism in the step S2, driving the first fuel ball and the second fuel ball to move upwards synchronously, and enabling the first fuel ball to enter the second ball through hole and roll to the second first ball through hole along the second transmission pipe when the second slider moves to be communicated with the second ball through hole of the side support 10, and enabling the second fuel ball to enter the first second ball through hole and roll to the first ball through hole along the first transmission pipe when the first slider moves to be communicated with the first second ball through hole of the side support 10;
S5, the driving mechanism 1 drives the fuel lifting mechanism to continuously reciprocate up and down until the fuel ball is conveyed to the ball outlet pipe 4, passes through the pressure-bearing shell and then is conveyed to the target position.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, or communicable with each other, directly connected, indirectly connected through an intervening medium, or in communication between two elements or in an interactive relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.
For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (9)
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113205897A (en) * | 2021-04-29 | 2021-08-03 | 西安热工研究院有限公司 | Novel lifting device for spherical fuel of high-temperature gas cooled reactor |
| CN215247455U (en) * | 2021-04-29 | 2021-12-21 | 宁波嘉德轻工机械有限公司 | Reciprocating type elevator |
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| FR2724257B1 (en) * | 1994-09-06 | 1996-12-13 | Framatome Sa | DEVICE FOR HOLDING A CLUSTER OF ABSORBENT PENCILS DURING ITS TRANSPORT BY A MACHINE FOR HANDLING COMBUSTIBLE ASSEMBLIES. |
| AUPQ900600A0 (en) * | 2000-07-26 | 2000-08-17 | Tee Up Pty Ltd | Golf ball teeing device |
| WO2022110163A1 (en) * | 2020-11-30 | 2022-06-02 | 苏州中门子工业炉科技有限公司 | Hoisting machine for wear-resistant ball production |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113205897A (en) * | 2021-04-29 | 2021-08-03 | 西安热工研究院有限公司 | Novel lifting device for spherical fuel of high-temperature gas cooled reactor |
| CN215247455U (en) * | 2021-04-29 | 2021-12-21 | 宁波嘉德轻工机械有限公司 | Reciprocating type elevator |
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