CN110148482B - Escalator type fuel transmission device - Google Patents
Escalator type fuel transmission device Download PDFInfo
- Publication number
- CN110148482B CN110148482B CN201910471958.1A CN201910471958A CN110148482B CN 110148482 B CN110148482 B CN 110148482B CN 201910471958 A CN201910471958 A CN 201910471958A CN 110148482 B CN110148482 B CN 110148482B
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- Prior art keywords
- fuel
- containing body
- transmission
- escalator
- bearing
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 239000000446 fuel Substances 0.000 title claims abstract description 89
- 230000005540 biological transmission Effects 0.000 title claims abstract description 70
- 239000000428 dust Substances 0.000 claims abstract description 26
- 230000009347 mechanical transmission Effects 0.000 claims abstract description 19
- 230000005484 gravity Effects 0.000 claims abstract description 14
- 230000008878 coupling Effects 0.000 claims abstract description 13
- 238000010168 coupling process Methods 0.000 claims abstract description 13
- 238000005859 coupling reaction Methods 0.000 claims abstract description 13
- 239000001307 helium Substances 0.000 claims abstract description 13
- 229910052734 helium Inorganic materials 0.000 claims abstract description 13
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims abstract description 13
- 238000007599 discharging Methods 0.000 claims description 9
- 239000002915 spent fuel radioactive waste Substances 0.000 claims description 7
- 238000007789 sealing Methods 0.000 claims description 6
- 238000005096 rolling process Methods 0.000 claims description 4
- 238000005461 lubrication Methods 0.000 description 7
- 239000012634 fragment Substances 0.000 description 6
- 238000002347 injection Methods 0.000 description 6
- 239000007924 injection Substances 0.000 description 6
- 230000000903 blocking effect Effects 0.000 description 5
- 239000003758 nuclear fuel Substances 0.000 description 5
- 230000002285 radioactive effect Effects 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000008188 pellet Substances 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005381 potential energy Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
- Escalators And Moving Walkways (AREA)
Abstract
The invention provides an escalator type fuel transmission device which comprises a sealed containing body containing helium, a mechanical transmission part positioned in the containing body, a driving motor positioned outside the containing body and a permanent magnet coupling; the upper end and the lower end of the containing body are respectively communicated with a gravity type passive slotted roller way, the bottom of the slotted roller way is provided with a dust conveying pipe, and the tail end of the dust conveying pipe is communicated with a dust collecting device; the mechanical transmission part comprises a transmission ratchet wheel, a driving chain fixed on the transmission ratchet wheel and a plurality of steps fixed on the driving chain, the transmission ratchet wheel is sleeved on a transmission shaft, one end of the transmission shaft is fixed on the inner side wall of the containing body through a bearing and a bearing end cover, and the other end of the transmission shaft is positioned outside the containing body and connected with the driving motor through a permanent magnet coupling. The fuel transmission device has no fault point, reliable operation, simple system equipment and pipeline arrangement, flexible and convenient combination with other functional equipment and high economy.
Description
Technical Field
The invention belongs to the technical field of material transmission, and particularly relates to an escalator type fuel transmission device used in the technical fields of a high-temperature gas cooled reactor nuclear fuel loading and unloading circulating system or petrochemical industry, electric power and the like.
Background
The fuel loading and unloading cycle needs to rely on a helium compressor to provide a pneumatic conveying power source required by lifting the fuel ball, under normal working conditions, the fuel ball carries out core main cycle, spent fuel unloading and new fuel injection through helium pneumatic conveying, and in the pneumatic circulating conveying process, the fuel ball continuously rubs and collides with a discharging device, broken ball separating equipment, fuel consumption measuring equipment, bridging equipment and the like and a pipe wall.
The existing fuel ball pneumatic conveying device has the following defects: under normal working conditions, in the pneumatic circulation transmission process of the fuel ball, a pneumatic transmission power source required by lifting the fuel ball is required to be provided by a helium compressor, and the fuel circulation loses the power source due to the insufficient reliability of the helium compressor, so that a reactor is stopped passively; meanwhile, in the pneumatic circulation transmission process, the requirements on the inner diameter of a pneumatic transmission pipeline and the protrusion or the depression of the inner wall of a welding line of the pipeline are high, fuel balls continuously rub and collide with the pipe wall, generated fuel dust and scraps often cause the blocking accident of the fuel balls, and the fuel balls cannot be transmitted and circulate to cause the passive shutdown of the reactor; the quantity of fuel balls in the pneumatic conveying pipeline and the size deviation of the fuel balls are different in requirements on pneumatic conveying pressure parameters, so that the retention and vibration of the fuel balls in the pipeline are aggravated, and the system is unstable in operation.
Under the working condition of the fuel ball blocking accident, in the high-temperature, high-pressure and high-radioactivity environment and the complex pipeline environment, the blocking point of the fuel ball is found to be difficult to be detected and side by side, and the maintenance personnel and maintenance tools of partial blocking point are not reachable, and the radioactive leakage is easily caused by the blocking accident of the fuel ball.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides an escalator type fuel transmission device which has no fault point, reliable operation, simple system equipment and pipeline arrangement, flexible and convenient combination with other functional equipment (a discharging device, a broken ball separating device, a fuel consumption measuring device and a feeding device) and high economy.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
the invention provides an escalator type fuel transmission device which is characterized by comprising a sealed containing body containing helium, a mechanical transmission part positioned in the containing body, a driving motor positioned outside the containing body and a permanent magnet coupler; the upper end and the lower end of the containing body are respectively communicated with a gravity type passive slotted roller path, a dust conveying pipe used for collecting dust and fragments falling through the slotted roller path is arranged at the bottom of the slotted roller path, and the tail end of the dust conveying pipe is communicated with a dust collecting device; the mechanical transmission part comprises a transmission ratchet wheel, a driving chain fixed on the transmission ratchet wheel and a plurality of steps fixed on the driving chain, wherein the transmission ratchet wheel is sleeved on a transmission shaft, one end of the transmission shaft is positioned in the containing body and fixed on the inner side wall of the containing body through a first bearing and a bearing end cover, the other end of the transmission shaft is positioned outside the containing body and connected with the driving motor through a permanent magnet coupling, and the permanent magnet coupling is in sealing connection with the outer side wall of the containing body.
Further, the tread surface of the step has a limit groove for preventing the rolling of fuel on the step.
Further, a nuclear fuel consumption measuring and distributing device is arranged on the slotted roller path and is used for detecting fuel consumption and discharging fuel below the limit value of the fuel consumption out of the slotted roller path, and the nuclear fuel consumption measuring and distributing device is communicated with a spent fuel discharging device.
The invention has the characteristics and beneficial effects that:
the invention provides an escalator type fuel transmission device, wherein a mechanical transmission part is arranged in a high-temperature, high-pressure and high-radioactivity container helium atmosphere, and a driving motor and a permanent magnet coupling are arranged outside the container. The transmission ratchet wheel on the mechanical transmission part of the fuel transmission device is fixed on the inner wall of the containing body through the oil-free lubrication bearing and the bearing shell, the torque of the transmission ratchet wheel is input by the permanent magnet coupling, the opening of the containing body caused by torque transmission is avoided, the non-contact torque sealing transmission is realized, and the leakage and the radioactive escape of helium are prevented. The ball inlet end and the ball outlet end of the fuel conveying device are connected with a gravity type passive slotted roller path, and fuel dust flows into the dust collecting device through the slotted roller path. The fuel balls roll to the steps (or steps) provided with limit grooves through the slotted rollaway nest, and the steps (or steps) are arranged on the driving chain and realize upward or downward adjustable speed circulation movement, new fuel injection and spent fuel discharge through the transmission of the driving chain and the transmission ratchet wheel.
The fuel transmission device utilizes the escalator type mechanical transmission device to have steps which circularly run and is used for transporting fuel upwards or downwards and transmitting the fuel to a target end, the escalator type mechanical transmission device is contained to form a closed fuel circulation environment through a steel high-temperature-resistant, pressure-bearing and radioactive-containing pipeline, and the driving force of the escalator type mechanical transmission is provided through a permanent magnet magnetic driving device. The starting end and the terminal end of the escalator transmission device are connected by utilizing a grooved roller path which is passive by gravity, so that the reliability of the transmission of the fuel injection end and the target end is ensured. Compared with the pneumatic conveying of fuel balls, the escalator type fuel conveying device has the advantages of no fault point, reliable operation, simple system equipment and pipeline arrangement, flexible and convenient combination with other functional equipment (a discharging device, a broken ball separating device, a fuel consumption measuring device and a feeding device) and high economical efficiency.
Drawings
Fig. 1 is a schematic view of the overall structure of an escalator fuel transfer device according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a permanent magnet magnetic drive according to an embodiment of the present invention;
FIG. 3 is a schematic view of a slotted raceway slit according to an embodiment of the invention;
FIG. 4 is a schematic view of a stair step according to an embodiment of the present disclosure;
fig. 5 is a diagram showing the application and implementation of the escalator type fuel conveying device in a high-temperature gas cooled reactor nuclear power plant.
Detailed Description
The following detailed description of the technical scheme of the invention is given by combining the accompanying drawings and the embodiments:
referring to fig. 1 and 2, the escalator type fuel transmission device of the embodiment of the invention comprises a sealed containing body 7 containing helium, a mechanical transmission part 6 positioned in the containing body 7, and a driving motor 10 and a permanent magnet coupling positioned outside the containing body 7; the upper end and the lower end of the containing body 7 are respectively communicated with gravity type passive slotted raceways (2, 9), dust conveying pipes 3 for collecting dust and fragments falling through the slotted raceways are arranged at the bottoms of the slotted raceways (2, 9), and the tail ends of the dust conveying pipes are communicated with a dust collecting device 4; the mechanical transmission part 6 comprises a transmission ratchet wheel 14, a driving chain 8 fixed on the transmission ratchet wheel 14 and a plurality of steps 5 fixed on the driving chain 8, wherein the transmission ratchet wheel 14 is sleeved on a transmission shaft 18, one end of the transmission shaft 18 is positioned in the containing body 7 and fixed on the inner side wall of the containing body 7 through a first bearing 15 and a bearing end cover 16, the other end of the transmission shaft 18 is positioned outside the containing body 7 and connected with the driving motor 10 through a permanent magnet coupler, and the permanent magnet coupler is in sealing connection with the outer side wall of the containing body 7.
The examples of the invention are further illustrated as follows:
the ball inlet end of the fuel ball 1 is connected with the upper end of a gravity type passive slotted raceway 2, the lower end of the slotted raceway 2 is connected with the lower end of a containing body 7, the upper end of the containing body 7 is connected with the upper end of a slotted raceway 9, the lower end of the slotted raceway 9 is connected with the ball inlet end of the fuel ball 1, a transmission ratchet wheel 14 in a mechanical transmission part 6 is fixed on the inner wall of the containing body 7 through oil-free lubrication bearings (15, 17 and 19) and a bearing shell 16, the mechanical transmission part 6 is arranged in the containing body 7 with high temperature resistance, high pressure resistance and radioactivity, and the containing body can be formed by welding a pressure container or a plurality of metal pipelines; the driving motor 10 and the magnetic coupling are arranged outside the containing body 7 and positioned at the upper end and the lower end of the containing body, the magnetic coupling comprises an outer magnetic rotor 11 and an inner magnetic rotor 13, one end of the inner magnetic rotor 13 is connected with one end of the outer magnetic rotor 11 through an oil-free lubrication bearing 19, and the other end of the inner magnetic rotor 13 is connected with the other end of the outer magnetic rotor 11 and a transmission shaft 18 through an oil-free lubrication bearing 17. When the driving motor 10 drives the outer magnetic rotor 11 to rotate, the magnetic field can penetrate through the air gap and the nonmagnetic substance to drive the inner magnetic rotor 13 to synchronously rotate, and the inner magnetic rotor 13 drives the transmission ratchet wheel 14 to rotate through the transmission shaft 18. The torque of the transmission ratchet wheel 14 depends on permanent magnet input, so that the opening of the containing body 7 caused by torque input is avoided, the non-contact torque sealing transmission is realized, and the leakage of helium and the radioactive escape are prevented.
The fuel ball 1 has a certain potential difference between the ball inlet end and the lower end of the containing body 7, under the action of gravity, the fuel ball 1 rolls into the lower end of the containing body 7 through the slotted race 2 and is placed on the stepping surface of the step 5 with the limit groove 20 (see fig. 4), dust and fragments generated when the fuel ball 1 rolls in the slotted race 2 fall into the dust conveying pipe 3 through the slit 21 (see fig. 3) of the slotted race 2, and finally are gathered into the dust collecting device 4 for collection and removal, so that the accumulation of dust and fragments is prevented from influencing the rolling of the fuel ball 1 in the slotted race 2. The step 5 is arranged on the driving chain 8 and transmits the fuel ball 1 to the upper end part of the slotted raceway 9 through the transmission of the transmission ratchet wheel 14, and the fuel ball 1 rolls to the fuel ball inlet end under the action of gravity, so that the fuel circulation transmission is realized.
As shown in fig. 5, the nuclear reactor pressure vessel 27, the unloading device 28, the first gravity type passive slotted raceway 2, the first escalator type fuel conveying device, the second gravity type passive slotted raceway 9, the second escalator type fuel conveying device, the third gravity type passive slotted raceway 24 and the new fuel injection device 26 are sequentially connected to form a complete loop pressure boundary, so that high temperature, high pressure and radioactivity containment are realized; and a nuclear fuel consumption measuring and distributing device 22 and a spent fuel discharging device 21 are also arranged on the second gravity type passive slotted roller path 9. In each fuel transmission device, a transmission ratchet wheel 14 in a mechanical transmission part (6, 23) is respectively connected with a corresponding transmission shaft 18 through an oil-free lubrication bearing 15 and a bearing shell 16 and is fixed on the inner wall of a respective containing body, each transmission shaft is connected with an inner magnetic rotor 13 in a permanent magnet coupler through an oil-free lubrication bearing 17, and the inner magnetic rotor 13 is connected with an outer magnetic rotor 11 through an oil-free lubrication bearing 19; the driving motors 10 and the permanent magnet couplings are arranged outside the corresponding containers, the torque of each transmission ratchet wheel depends on permanent magnet input, the holes of the containers are avoided due to torque input, the non-contact torque sealing transmission is realized, and helium leakage and radioactivity escape are prevented.
In the system shown in fig. 5, the transportation process of the fuel sphere 1 is as follows: after being discharged from a reactor pressure vessel 27 through a discharge device 28, the fuel balls 1 roll onto the step 5 stepping surface with a limit groove 20 in a mechanical transmission part 6 through a slotted raceway 2 under the action of gravity, dust and fragments generated when the fuel balls 1 are discharged from the discharge device 28 and roll in the slotted raceway 2 fall into a dust conveying pipe 3 through a slit of the slotted raceway, and finally are gathered to a dust collecting device 4 for collection and removal, so that the accumulation of the dust and fragments is avoided to influence the rolling of the fuel balls 1 in the slotted raceway 2. The step 5 is arranged on the driving chain 8 and transmits the fuel ball 1 to the slotted roller path 9 through the transmission of the transmission ratchet wheel 14, and the torque of the transmission ratchet wheel 14 depends on the permanent magnetic input of the driving motor 10 and the permanent magnetic coupling outside the containing body 7, so that the opening of the containing body 7 caused by the torque input is avoided, and the leakage and the radioactive escape of helium are prevented. The continuous transmission process and principle of the fuel balls 1 on the grooved roller paths 9 and 24 and the mechanical transmission part 23 are the same as the previous, and finally the fuel balls 1 are respectively rolled into the nuclear reactor pressure vessel 27 through the grooved roller paths 9, the mechanical transmission part 23 and the grooved roller path 24, so that the fuel circulation transmission is realized.
During the process of multiple circulation transmission of the fuel ball 1, the nuclear fuel consumption measuring and distributing device 22 arranged on the slotted raceway 9 detects that the fuel ball 1 is lower than the lower limit of fuel consumption measurement, and the fuel ball 1 is discharged into the spent fuel discharging device 21, so that spent fuel discharging is realized.
During the nuclear reaction fuel pellet circulation process, a new fuel injection device 26 is arranged on the slotted raceway 24, and new fuel pellets 25 roll into the passive slotted raceway 24 through potential energy height difference and enter a nuclear reactor pressure vessel 27 to realize new fuel injection.
The above examples are only for illustrating the present invention and are not to be construed as limiting the invention. In accordance with the principles of the present invention, one of ordinary skill can devise many variations of an escalator fuel transfer device. The scope of the invention is defined by the claims.
Claims (6)
1. An escalator fuel transmission device is characterized by comprising a sealed containing body (7) containing helium, a mechanical transmission part (6) positioned in the containing body (7), and a driving motor (10) and a permanent magnet coupling which are positioned outside the containing body (7); the upper end and the lower end of the containing body (7) are respectively communicated with a gravity type passive slotted roller path (2, 9), a dust conveying pipe (3) for collecting dust and scraps falling through the slotted roller path is arranged at the bottom of the slotted roller paths (2, 9), and the tail end of the dust conveying pipe is communicated with a dust collecting device (4); the mechanical transmission part (6) comprises a transmission ratchet wheel (14), a driving chain (8) fixed on the transmission ratchet wheel (14) and a plurality of steps (5) fixed on the driving chain (8), wherein the transmission ratchet wheel (14) is sleeved on a transmission shaft (18), one end of the transmission shaft (18) is positioned in the containing body (7) and fixed on the inner side wall of the containing body through a first bearing (15) and a bearing end cover (16), the other end of the transmission shaft (18) is positioned outside the containing body (7) and connected with the driving motor (10) through a permanent magnet coupler, and the permanent magnet coupler is in sealing connection with the outer side wall of the containing body (7).
2. An escalator fuel transfer device according to claim 1, characterized in that the tread surface of the step (5) has a limit groove (20) for preventing rolling of fuel on the step (5).
3. Escalator fuel transfer arrangement according to claim 1, characterized in that the permanent magnet coupling comprises an outer magnet rotor (11) and an inner magnet rotor (13), the outer magnet rotor (11) being driven by the drive motor (10), one end of the inner magnet rotor (13) being connected to one end of the outer magnet rotor (11) via a second bearing (19), the other end of the inner magnet rotor (13) being connected to the other end of the outer magnet rotor (11) and to the drive shaft (18) via a third bearing (17).
4. The escalator fuel transfer device of claim 1, wherein the first bearing is an oil-free bearing.
5. An escalator fuel transfer device according to claim 3, wherein the second and third bearings are oil-free bearings.
6. Escalator fuel transfer device according to any one of claims 1-5, characterized in that a nuclear burn-up measuring and dispensing device (22) is provided on the grooved raceways (2, 9) for detecting the burn-up of fuel and for discharging fuel below a burn-up limit out of the grooved raceways (2, 9), the nuclear burn-up measuring and dispensing device (22) being in communication with a spent fuel discharge device (21).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910471958.1A CN110148482B (en) | 2019-05-31 | 2019-05-31 | Escalator type fuel transmission device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910471958.1A CN110148482B (en) | 2019-05-31 | 2019-05-31 | Escalator type fuel transmission device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110148482A CN110148482A (en) | 2019-08-20 |
| CN110148482B true CN110148482B (en) | 2024-03-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910471958.1A Active CN110148482B (en) | 2019-05-31 | 2019-05-31 | Escalator type fuel transmission device |
Country Status (1)
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| CN (1) | CN110148482B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115083642B (en) * | 2022-06-30 | 2023-08-22 | 华能核能技术研究院有限公司 | High-temperature gas cooled reactor fuel element conveying system and high-temperature gas cooled reactor system |
| CN115482948B (en) * | 2022-08-15 | 2024-06-18 | 华能山东石岛湾核电有限公司 | High-temperature gas cooled reactor fuel ball lifting system |
| CN115295193B (en) * | 2022-08-19 | 2024-02-23 | 华能山东石岛湾核电有限公司 | Lifting device for fuel element |
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| Publication number | Publication date |
|---|---|
| CN110148482A (en) | 2019-08-20 |
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