CN117594268B - Fuel element flow blocking, positioning and distributing device applied to high-temperature gas cooled reactor - Google Patents
Fuel element flow blocking, positioning and distributing device applied to high-temperature gas cooled reactor Download PDFInfo
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- CN117594268B CN117594268B CN202311290478.8A CN202311290478A CN117594268B CN 117594268 B CN117594268 B CN 117594268B CN 202311290478 A CN202311290478 A CN 202311290478A CN 117594268 B CN117594268 B CN 117594268B
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- 239000000446 fuel Substances 0.000 title claims abstract description 51
- 230000000903 blocking effect Effects 0.000 title claims abstract description 28
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 6
- 239000000428 dust Substances 0.000 claims description 7
- 238000009826 distribution Methods 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 abstract 2
- 239000007789 gas Substances 0.000 description 27
- 238000005259 measurement Methods 0.000 description 11
- 238000005315 distribution function Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000001307 helium Substances 0.000 description 4
- 229910052734 helium Inorganic materials 0.000 description 4
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 230000002441 reversible effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000005256 carbonitriding Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000002915 spent fuel radioactive waste Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 229910001069 Ti alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005242 forging Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000013011 mating Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000003758 nuclear fuel Substances 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000003860 storage Methods 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
- G21C19/20—Arrangements for introducing objects into the pressure vessel; Arrangements for handling objects within the pressure vessel; Arrangements for removing objects from the pressure vessel
- G21C19/202—Arrangements for handling ball-form, i.e. pebble fuel
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C17/00—Monitoring; Testing ; Maintaining
- G21C17/10—Structural combination of fuel element, control rod, reactor core, or moderator structure with sensitive instruments, e.g. for measuring radioactivity, strain
-
- 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)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention discloses a fuel element flow blocking, positioning and distributing device applied to a high-temperature gas cooled reactor, and relates to the technical field of important system supporting equipment of a reactor. The ball feeding device comprises a pressure-bearing unit, a ball feeding device and a ball discharging device, wherein the pressure-bearing unit comprises a pressure-bearing box body and an end flange, a first rotating space and a second rotating space are formed in the pressure-bearing box body, the end flange is arranged at one end of the pressure-bearing box body, and two ends of the pressure-bearing box body are connected with a ball feeding pipe and a ball discharging pipe; the rotor unit comprises a first rotor and a second rotor, and the first rotor and the second rotor are arranged in a first rotating space and a second rotating space; the driving unit comprises a motor, and the output end of the motor is sequentially provided with a speed reducer, a coupler and a magnetic synchronizer which is connected with the first rotor; the check unit comprises a supporting ring, a pawl and a ratchet wheel, wherein the supporting ring is arranged in the end flange, and the pawl and the ratchet wheel are arranged in the supporting ring.
Description
Technical Field
The invention relates to the technical field of important system supporting equipment of a reactor, in particular to a fuel element flow blocking, positioning and distributing device applied to a high-temperature gas-cooled reactor.
Background
The pebble-bed high-temperature gas cooled reactor is an advanced nuclear reactor with good inherent safety, can be used for high-efficiency power generation and high-temperature heat supply, and is one of the first-choice reactor types in the fourth generation nuclear energy system in the international nuclear energy field. The fuel loading and unloading system performs the functions of new fuel loading, spent fuel unloading and fuel recycling, and is a key system for ensuring long-term safe and stable operation of the high-temperature stack, so that the continuous operation capacity of the fuel loading and unloading system directly determines the safe operation level of the high-temperature stack.
At present, the main stream of the ball bed type high-temperature stacks at home and abroad all adopt multiple devices to execute the functions, the system is required to provide sufficient installation space and maintenance space in arrangement, so that a fuel transmission path is long, the devices designed by the stacks do not fully consider the problem of fuel ball blocking caused by the operation of fuel elements in helium, dust and debris environments, and great challenges are brought to the operation of the system and the maintenance of the equipment in a strong radioactive environment. Therefore, the integrated design of key equipment of the fuel loading and unloading system is developed, the system is further simplified, and the method is beneficial to reducing the investment cost of the high-temperature reactor and improving the safe operation capacity of the reactor.
Disclosure of Invention
The present invention has been made in view of the above-mentioned problems of fuel ball jamming faced by the operation of fuel elements in helium, dust, and debris environments, which are not fully considered by the prior art devices.
Therefore, the invention aims to provide a fuel element flow blocking, positioning and distributing device applied to a high-temperature gas cooled reactor, and aims to solve a series of problems of multiple devices, complex arrangement, low fuel transmission efficiency and the like of a fuel loading and unloading system in the prior art, and provide a high-integration and high-reliability ball flow conveying device capable of realizing the functions of single conveying of a ball element, measurement and positioning of fuel consumption, directional distribution of fuel and gas flow blocking.
In order to solve the technical problems, the invention provides the following technical scheme: the fuel element flow blocking, positioning and distributing device comprises a pressure-bearing unit, a pressure-bearing box body and an end flange, wherein one end of the pressure-bearing box body is opened, a first rotating space and a second rotating space are formed in the pressure-bearing box body, the end flange is arranged at the opening end of the pressure-bearing box body, and two ends, adjacent to the end flange, of the pressure-bearing box body are respectively connected with a ball inlet pipe and a ball outlet pipe; the rotor unit comprises a first rotor and a second rotor, the first rotor and the second rotor are respectively arranged in a first rotating space and a second rotating space, and the driving unit comprises a motor, the output end of the motor is further provided with a speed reducer, a coupler and a magnetic synchronizer in sequence, and the output end of the magnetic synchronizer is connected with the first rotor; the check unit comprises a supporting ring, a pawl and a ratchet wheel, wherein the supporting ring is arranged in the end flange, and the pawl and the ratchet wheel are arranged in the supporting ring.
As a preferred scheme of the fuel element flow blocking, positioning and distributing device applied to the high-temperature gas cooled reactor, the invention comprises the following steps: the ball outlet pipe comprises a first ball outlet pipe and a second ball outlet pipe, the first ball outlet pipe and the second ball outlet pipe are symmetrically distributed on two sides of a ball inlet pipe axis, and an included angle alpha between the first ball outlet pipe and the second ball outlet pipe is not smaller than 90 degrees.
As a preferred scheme of the fuel element flow blocking, positioning and distributing device applied to the high-temperature gas cooled reactor, the invention comprises the following steps: the first rotating space comprises a first bearing space and a first ball launching space, the second rotating space comprises a second bearing space and a second ball launching space, the inner diameter of the first bearing space is equal to that of the second bearing space, the inner diameter of the first ball launching space is equal to that of the second ball launching space, the inner diameter of the first bearing space is larger than that of the second ball launching space, and the axes of the first rotating space and the axes of the second rotating space are parallel and are all intersected with the extension line of the axis of the ball outlet pipe.
As a preferred scheme of the fuel element flow blocking, positioning and distributing device applied to the high-temperature gas cooled reactor, the invention comprises the following steps: a first ball inlet and a second ball inlet are formed in the inner wall of the first ball sending space, the first ball inlet and the second ball inlet are positioned on radial bisectors of the first ball sending space, the first ball inlet and the second ball inlet are respectively communicated with a ball inlet pipe and a second ball sending space, and the axes of the first ball inlet and the second ball inlet are coincident with the axis of the ball inlet pipe; the first ball outlet hole and the second ball outlet hole are symmetrically formed in the inner wall of the second ball sending space and are respectively communicated with the first ball outlet pipe and the second ball outlet pipe.
As a preferred scheme of the fuel element flow blocking, positioning and distributing device applied to the high-temperature gas cooled reactor, the invention comprises the following steps: the joint of the first bearing space and the first ball sending space forms a first bearing platform, the joint of the second bearing space and the second ball sending space forms a second bearing platform, and the first bearing platform and the second bearing platform are identical in size and are flush in end face; and one end of the pressure-bearing box body, which is far away from the end flange, is also provided with a collimation hole.
As a preferred scheme of the fuel element flow blocking, positioning and distributing device applied to the high-temperature gas cooled reactor, the invention comprises the following steps: the first rotor comprises a first rotating shaft, a first gear, a first bearing seat, a first rotary table and a connecting shaft, wherein the first gear is sleeved outside the first rotating shaft, and the end part of the connecting shaft can be matched and inserted into the working end of the magnetic synchronizer; the end parts of the two ends of the first rotating disc are respectively connected with a first bearing seat and a second bearing seat, the two ends of the first rotating shaft are respectively fixedly connected with the first bearing seat and the connecting shaft, a first bearing and a second bearing are respectively sleeved outside the first bearing seat and the second bearing seat in a rotating mode, the first bearing seat is fixedly sleeved on the first bearing, and the first bearing seat are detachably connected.
As a preferred scheme of the fuel element flow blocking, positioning and distributing device applied to the high-temperature gas cooled reactor, the invention comprises the following steps: the ball receiving cup is arranged on the side wall of the first rotating disc, the bottom of the ball receiving cup is connected with a bearing table, and a dust collecting groove is formed between the top end of the bearing table and the bottom space of the ball receiving cup.
As a preferred scheme of the fuel element flow blocking, positioning and distributing device applied to the high-temperature gas cooled reactor, the invention comprises the following steps: the second rotor comprises a second rotating shaft, a second gear, a second bearing and a second rotary table, the second gear is sleeved at the end part of the second rotating shaft, and the second gear is meshed with the first gear; the end parts at two ends of the second turntable are connected with a third bearing seat and a fourth bearing seat, the end part of the second rotating shaft is fixedly connected with the third bearing seat, a third bearing and a fourth bearing are respectively and rotatably sleeved outside the third bearing seat and the fourth bearing seat, the second bearing seat is fixedly sleeved on the third bearing, and the second bearing seat are detachably connected.
As a preferred scheme of the fuel element flow blocking, positioning and distributing device applied to the high-temperature gas cooled reactor, the invention comprises the following steps: and the second turntable is radially provided with a through hole in a penetrating way, the axis of the through hole is coincident with the axis of the ball receiving cup, and the inner diameters of the through hole and the ball receiving cup are equal.
As a preferred scheme of the fuel element flow blocking, positioning and distributing device applied to the high-temperature gas cooled reactor, the invention comprises the following steps: the middle part of the end flange is provided with a through hole, the supporting ring is connected in the through hole in an embedded manner, the circumferential side wall of the supporting ring is provided with a placing hole, and the pawl is hinged in the placing hole; the ratchet side wall is fixedly connected with a ratchet, the pawl working end is indirectly clamped with the ratchet, and the ratchet is fixedly sleeved on the connecting shaft.
The invention has the beneficial effects that:
The invention can execute the single conveying function, the burnup measurement and positioning function, the directional distribution function of the fuel balls, the gas flow blocking function and the debris self-guiding function of the fuel loading and unloading system, realizes the multifunctional integration, can simplify the process flow of the pebble-bed type high-temperature reactor fuel loading and unloading system, and effectively solves the problems of more system equipment and large space occupation rate.
According to the invention, the first rotating space and the second rotating space are arranged to form the debris flow annular groove, so that the problem of frequent blockage of fuel balls in the debris environment is solved, the reliability of fuel loading and unloading system equipment is greatly improved, the usability and economic benefits of the pebble-bed high-temperature gas cooled reactor nuclear power unit are improved, and the risks of internal irradiation and external irradiation caused by overhauling the existing equipment in a strong radioactive environment after blockage are reduced. The invention adopts a single driving mechanism to realize double-rotor linkage, thereby greatly simplifying equipment and reducing equipment cost.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic diagram of the overall structure of a fuel element flow blocking, positioning and distributing device applied to a high temperature gas cooled reactor.
FIG. 2 is a schematic diagram of a check unit structure of a fuel element choke, positioning and distributing device applied to a high temperature gas cooled reactor.
FIG. 3 is a schematic view of the structure of the pressure-bearing tank of the fuel element choke, positioning and distributing device applied to the high temperature gas cooled reactor.
FIG. 4 is a schematic view of the structure of the inlet and outlet tubes of the device for blocking, positioning and distributing fuel elements applied to a high temperature gas cooled reactor.
FIG. 5 is a cross-sectional view of a fuel element flow blocking, positioning and distributing device of the present invention as applied to a high temperature gas cooled reactor.
FIG. 6 is a schematic diagram of the first and second rotors of the fuel element flow blocking, positioning and distributing device of the present invention applied to a high temperature gas cooled reactor.
FIG. 7 is a first rotor cross-sectional view of a fuel element flow blocking, positioning and distributing device of the present invention applied to a high temperature gas cooled reactor.
FIG. 8 is a cross-sectional view of a second rotor of the fuel element flow blocking, positioning and distributing device of the present invention applied to a high temperature gas cooled reactor.
FIG. 9 is a cross-sectional view of an end flange and check unit of a fuel element flow blocking, positioning and distribution device of the present invention applied to a high temperature gas cooled reactor.
FIG. 10 is a schematic diagram of the check unit and first rotor connection of the fuel element flow blocking, positioning and distributing device of the present invention applied to a high temperature gas cooled reactor.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
In describing the embodiments of the present invention in detail, the cross-sectional view of the device structure is not partially enlarged to a general scale, and the schematic drawings are only examples, which should not limit the scope of the present invention. In addition, the three-dimensional dimensions of length, width and depth should be included in actual fabrication.
Example 1
Referring to fig. 1 and 2, for a first embodiment of the present invention, there is provided a fuel element choke, positioning and distributing device applied to a high temperature gas cooled reactor, the device includes a pressure-bearing unit 100, including a pressure-bearing box 101 and an end flange 102, one end of the pressure-bearing box 101 is opened, a first rotating space K1 and a second rotating space K2 are opened in the pressure-bearing box 101, the end flange 102 is disposed at an opening end of the pressure-bearing box 101, and two ends of the pressure-bearing box 101 adjacent to the end flange 102 are respectively connected with a ball inlet pipe 101a and a ball outlet pipe 101b.
The rotor unit 200 includes a first rotor 201 and a second rotor 202, and the first rotor 201 and the second rotor 202 are respectively disposed in a first rotation space K1 and a second rotation space K2.
The driving unit 300 comprises a motor 301, wherein the output end of the motor 301 is further provided with a speed reducer 302, a coupler 303 and a magnetic synchronizer 304 in sequence, and the output end of the magnetic synchronizer 304 is connected with the first rotor 201.
Check unit 400 includes a support ring 401, pawls 402, and ratchet 403, support ring 401 being disposed within end flange 102, pawls 402 and ratchet 403 being disposed within support ring 401.
The bearing box body 101 is one of bearing boundaries of the device and is mainly used for installing the rotor unit 200 and the gear transmission assembly, two cylindrical counter bore structures are preferably formed in the bearing box body 101, 1 ball inlet pipe 101a and two ball outlet pipes 101b are formed in the side face of the box body, the ball inlet pipes 101a and the ball outlet pipes 101b are located on the same plane, and the ball outlet pipes 101b are symmetrically distributed on two sides of the axis of the ball inlet pipe 101a of the bearing box body 101; the two cylindrical counter bores inside the pressure bearing box body 101 are communicated, so that the spherical units can pass through conveniently.
The end flange 102 is installed on the upper part of the pressure-bearing box body 101, which is one of the pressure-bearing boundaries of the device, the check unit 400 is installed inside the end flange 102, the end flange 102 is connected with the pressure-bearing box body 101 through equal-length studs, and the upper part of the end flange 102 is provided with bolt holes for being connected with the shell of the magnetic synchronizer 304.
The rotor unit 200 functions as an execution part to realize a single delivery function of the spherical element, a burnup measurement positioning function and a directional distribution function, and a helium choking function.
Check unit 400 performs a unidirectional operation and a reverse check function, i.e., allows rotor unit 200 to operate in a single direction and thereby deliver fuel elements, and when rotor unit 200 rotates in a reverse direction, the check unit 400 is engaged to perform a rotor positioning function.
The driving unit 300 mainly performs a driving function of a rotor, the motor 301 is preferably a servo motor, and the motor 301 can precisely control a rotation angle of the rotor unit 200 to realize a precise conveying function of a fuel element; the speed reducer 302 is a precise planetary speed reducer; the coupling 303 is an oldham coupling with better rigidity.
Further, the rotor unit 200 is made of titanium alloy material to reduce the weight of the rotor, thereby reducing the moment of inertia of the rotor and further improving the running stability of the rotor.
The first rotor 201 and the second rotor 202 can be partially hollowed out to reduce the weight of the rotors, thereby reducing the rotational inertia of the rotors and further improving the running stability of the rotors.
The driving unit 300 is in sealing connection with the end flange 102, the end flange 102 is in sealing connection with the pressure-bearing box 101, the driving unit 300 is connected with the rotating shaft of the rotor unit 200 through a straight key or a spline and the like, the driving unit 300 can drive the first rotor 201, and the first rotor 201 drives the second rotor 202 to rotate.
Example 2
Referring to fig. 1 to 5, a second embodiment of the present invention is different from the first embodiment in that: the ball outlet pipe 101b comprises a first ball outlet pipe 101b-1 and a second ball outlet pipe 101b-2, the inner diameters of the first ball outlet pipe 101b-1 and the second ball outlet pipe 101b-2 are preferably 65mm, the first ball outlet pipe 101b-1 and the second ball outlet pipe 101b-2 are symmetrically distributed on two sides of the axis of the ball inlet pipe 101a, and an included angle alpha between the first ball outlet pipe 101b-1 and the second ball outlet pipe 101b-2 is not smaller than 90 degrees, and in the embodiment, the included angle alpha is preferably 120 degrees.
The first rotating space K1 comprises a first bearing space K11 and a first ball launching space K12, the second rotating space K2 comprises a second bearing space K21 and a second ball launching space K22, the first rotor 201 and the second rotor 202 are respectively installed in the first rotating space K1 and the second rotating space K2 in a rotating mode, the first rotating space K1 and the second rotating space K2 form a debris flow guide annular groove, the problem that fuel balls are frequently blocked when conveyed in a debris environment is solved, the inner diameter of the first bearing space K11 is equal to that of the second bearing space K21, the inner diameter of the first ball launching space K12 is equal to that of the second ball launching space K22, the inner diameter of the first bearing space K11 is larger than that of the second ball launching space K22, the axis of the first rotating space K1 is parallel to that of the second rotating space K2 and is intersected with the extension line of the ball outlet pipe 101b, and normal rotation of the first rotor 201 and the second rotor 202 is ensured.
The inner wall of the first ball sending space K12 is provided with a first ball feeding hole 101a-1 and a second ball feeding hole 101a-2, the inner diameters of the first ball feeding hole 101a-1 and the second ball feeding hole 101a-2 are preferably 65mm, the first ball feeding hole 101a-1 and the second ball feeding hole 101a-2 are positioned on the radial bisector of the first ball sending space K12, the first ball feeding hole 101a-1 and the second ball feeding hole 101a-2 are respectively communicated with the ball feeding pipe 101a and the second ball sending space K22, and the axes of the first ball feeding hole 101a-1 and the second ball feeding hole 101a-2 are coincident with the axis of the ball feeding pipe 101 a.
The inner wall of the second service space K22 is symmetrically provided with a first ball outlet hole 101b-1a and a second ball outlet hole 101b-2a, the first ball outlet hole 101b-1a and the second ball outlet hole 101b-2a are respectively communicated with a first ball outlet pipe 101b-1 and a second ball outlet pipe 101b-2, and the inner diameters of the first ball outlet hole 101b-1a and the second ball outlet hole 101b-2a are preferably 65mm.
A first bearing platform 101c is formed at the joint of the first bearing space K11 and the first ball sending space K12, a second bearing platform 101d is formed at the joint of the second bearing space K21 and the second ball sending space K22, the first bearing platform 101c and the second bearing platform 101d are identical in size, and the end faces are flush; the end of the pressure-bearing box body 101 far away from the end flange 102 is also provided with a collimation hole 101e, and the collimation hole 101e is matched with a burnup measurement system to execute a burnup measurement function, wherein the burnup measurement system is in the prior art.
The rest of the structure is the same as that of embodiment 1.
Example 3
Referring to fig. 6 to 10, a third embodiment of the present invention is different from the second embodiment in that: the rotor unit 200 functions as an execution part to realize a single delivery function of the spherical element, a burnup measurement positioning function and a directional distribution function, and a helium choking function.
The first rotor 201 performs a single conveying function and a gas flow blocking function of the spherical element, the first rotor 201 comprises a first rotating shaft 201a, a first gear 201b, a first bearing seat 201c, a first rotating disc 201d and a connecting shaft 201e, the first gear 201b is sleeved outside the first rotating shaft 201a, and the end part of the connecting shaft 201e can be matched and inserted into the working end of the magnetic synchronizer 304.
The ends of the two ends of the first rotating disc 201d are respectively connected with a first bearing seat 201d-1 and a second bearing seat 201d-2, the two ends of the first rotating shaft 201a are respectively and fixedly connected with the first bearing seat 201d-1 and a connecting shaft 201e, the first rotating disc is integrally machined and manufactured by forging pieces, a first bearing 201d-1a and a second bearing 201d-2a are respectively and rotatably sleeved outside the first bearing seat 201d-1 and the second bearing seat 201d-2a, a first bearing seat 201c is fixedly sleeved on the first bearing 201d-1a, the first bearing seat 201c is detachably connected with a first bearing table 101c, and the first rotor 201 is restrained in a first rotating space K1 through the first bearing 201d-1a and the second bearing 201d-2 a.
The ball receiving cup 201d-3 is arranged on the side wall of the first rotating disc 201d, the ball receiving cup 201d-3 is of an elliptic cylindrical structure and can only receive one spherical element, the bottom of the ball receiving cup 201d-3 is connected with the bearing table 201d-4 for supporting the spherical unit, and the top end of the bearing table 201d-4 and the bottom space of the ball receiving cup 201d-3 form a dust collecting groove 201d-5 for containing dust and scraps.
The first rotor 201 is connected with the driving unit 300 through a spline, and the first rotor 201 is in small clearance fit with the pressure-bearing box 101, preferably, the choke clearance is 0.05 mm-0.08 mm.
The second rotor 202 performs a spherical element positioning function and an orientation distribution function, the second rotor 202 includes a second rotating shaft 202a, a second gear 202b, a second bearing 202c and a second turntable 202d, the second gear 202b is sleeved at the end of the second rotating shaft 202a, and the second gear 202b is engaged with the first gear 201 b.
The two end parts of the second turntable 202d are connected with a third bearing seat 202d-1 and a fourth bearing seat 202d-2, the end part of the second rotating shaft 202a is fixedly connected with the third bearing seat 202d-1, a third bearing 202d-1a and a fourth bearing 202d-2a are respectively and rotatably sleeved outside the third bearing seat 202d-1 and the fourth bearing seat 202d-2, a second bearing seat 202c is fixedly sleeved on the third bearing 202d-1a, and the second bearing seat 202c is detachably connected with the second bearing platform 101 d.
The second rotary disc 202d is radially provided with a through hole 202d-3 in a penetrating way, the axis of the through hole 202d-3 coincides with the axis of the ball receiving cup 201d-3, the inner diameters of the through hole and the ball receiving cup are equal, and the second rotor 202 is coaxial with one ball outlet hole of the pressure-bearing box 101 when performing a directional distribution function.
The mating relationship of the first rotor 201 and the second rotor 202: the first rotor 201 and the second rotor 202 are installed in parallel; when the first rotor 201 is positioned at the ball receiving position, the ball receiving cup 201d-3 is positioned at the first ball inlet 101a-1 side, and the first ball inlet 101a-1 is coaxial with the ball receiving cup 201 d-3; when the first rotor 201 is in the ball feeding position, the ball receiving cup 201d-3 is positioned on the second ball inlet 101a-2 side.
The middle part of the end flange 102 is provided with a through hole 102a, the supporting ring 401 is connected in the through hole 102a in an embedded manner, the supporting ring 401 is of a hollow cylinder structure, the circumferential side wall of the supporting ring 401 is provided with a placement hole 401a, the pawl 402 is hinged in the placement hole 401a through a pawl fixing pin, the pawl fixing pin is also sleeved with a torsion spring, and the torsion spring has the function of enabling the pawl 402 to extend out of the placement hole 401a all the time; the side wall of the ratchet wheel 403 is fixedly connected with a ratchet wheel 403a, the working end of the pawl 402 is indirectly clamped with the ratchet wheel 403a, and the ratchet wheel 403 is fixedly sleeved on the connecting shaft 201 e.
Check unit 400 is disposed on the end flange to meet the need for quick service.
The ratchet 403 is preferably provided with a ratchet 403a on the outside and a shaft hole on the inside, coaxially mounted on the rotation shaft of the first rotor 201.
The check unit 400 realizes a unidirectional operation and a reverse check function, that is, allows the rotation shaft to operate in a single direction so as to convey the fuel element, and can realize a rotor positioning function in cooperation with the check unit 400 when the rotation shaft reversely rotates.
The surface of the ratchet 403 and the pawl 402 is preferably subjected to carbonitriding treatment, and the depth of the carbonitriding layer is 0.2-0.5 mm so as to increase the wear resistance.
The rest of the structure is the same as that of embodiment 2.
Referring to fig. 1 to 5 in combination, the working principle of the present invention is:
1. normal ball receiving and delivering:
The device realizes the separation and single conveying functions of the spherical elements in a string through the first rotor 201, and eliminates the influence of adjacent spherical elements; in the initial state, the ball receiving cup 201d-3 of the first rotor 201 is positioned at the ball receiving position, receives 1 spherical element, the first rotor 201 rotates 180 degrees, the first rotor 201 conveys the spherical element to the downstream, firstly enters the second ball inlet 101a-2, and then reaches the through hole 202d-3 of the second rotor 202; the spherical element is positioned for burnup measurement in the second rotor 202; after the burnup measurement is completed, the second rotor 202 turns left or right by 60 degrees, the measured spherical element is conveyed to the reactor core direction or the pipeline of the spent fuel storage direction in a directional manner, and the left or right turn depends on the consumption measurement value; after the ball element is directionally conveyed, the first rotor 201 returns to the ball receiving position, the serial ball element in the upstream ball inlet pipe 101a falls into the ball receiving cup 201d-3 of the first rotating disc 201d again, and other actions of the rotor in normal operation are all rotated in a single direction except for the directional distribution after the burnup measurement.
2. Initializing and changing:
the device needs to be initialized after initial running, accidental stopping or long-time ball receiving and delivering operation. During initialization, the rotor of the device reversely rotates, the initialization action of the device is completed according to the limit of the check unit 400, and the ball receiving cup 201d-3 is positioned at the ball receiving position after the initialization is completed.
3. Debris drainage and periodic removal:
In normal operation, the upstream graphite particles and dust enter the ball receiving cup 201d-3 of the first rotor 201 along with the fuel balls, fall into the through hole 202d-3 of the second rotor 202 under the action of gravity, and are conveyed to a downstream particle separating device through the through hole 202d-3 of the second rotor 202 during directional distribution.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (2)
1. The utility model provides a be applied to fuel element choked flow, location and distribution device of high temperature gas cooled reactor which characterized in that: comprising the steps of (a) a step of,
The bearing unit (100) comprises a bearing box body (101) and an end flange (102), wherein one end of the bearing box body (101) is opened, a first rotating space (K1) and a second rotating space (K2) are formed in the bearing box body, the end flange (102) is arranged at the opening end of the bearing box body (101), and two ends, adjacent to the end flange (102), of the bearing box body (101) are respectively connected with a ball inlet pipe (101 a) and a ball outlet pipe (101 b);
a rotor unit (200) including a first rotor (201) and a second rotor (202), the first rotor (201) and the second rotor (202) being disposed in a first rotation space (K1) and a second rotation space (K2), respectively;
The driving unit (300) comprises a motor (301), wherein the output end of the motor (301) is further provided with a speed reducer (302), a coupler (303) and a magnetic synchronizer (304) in sequence, and the output end of the magnetic synchronizer (304) is connected with the first rotor (201) and is connected with the second rotor;
A non-return unit (400) comprising a support ring (401), a pawl (402) and a ratchet (403), the support ring (401) being arranged in the end flange (102), the pawl (402) and the ratchet (403) being arranged in the support ring (401);
The ball outlet pipe (101 b) comprises a first ball outlet pipe (101 b-1) and a second ball outlet pipe (101 b-2), the first ball outlet pipe (101 b-1) and the second ball outlet pipe (101 b-2) are symmetrically distributed on two sides of the axis of the ball inlet pipe (101 a), and an included angle alpha between the first ball outlet pipe (101 b-1) and the second ball outlet pipe (101 b-2) is not smaller than 90 degrees;
The first rotating space (K1) comprises a first bearing space (K11) and a first ball sending space (K12), the second rotating space (K2) comprises a second bearing space (K21) and a second ball sending space (K22), the inner diameter of the first bearing space (K11) is equal to that of the second bearing space (K21), the inner diameter of the first ball sending space (K12) is equal to that of the second ball sending space (K22), the inner diameter of the first bearing space (K11) is larger than that of the second ball sending space (K22), and the axes of the first rotating space (K1) and the second rotating space (K2) are parallel and are all intersected with the axis extension line of the ball sending pipe (101 b);
A first ball inlet hole (101 a-1) and a second ball inlet hole (101 a-2) are formed in the inner wall of the first ball sending space (K12), the first ball inlet hole (101 a-1) and the second ball inlet hole (101 a-2) are located on the radial bisector of the first ball sending space (K12), the first ball inlet hole (101 a-1) and the second ball inlet hole (101 a-2) are respectively communicated with a ball inlet pipe (101 a) and a second ball sending space (K22), and the axes of the first ball inlet hole (101 a-1) and the second ball inlet hole (101 a-2) coincide with the axis of the ball inlet pipe (101 a);
A first ball outlet hole (101 b-1 a) and a second ball outlet hole (101 b-2 a) are symmetrically formed in the inner wall of the second ball service space (K22), and the first ball outlet hole (101 b-1 a) and the second ball outlet hole (101 b-2 a) are respectively communicated with the first ball outlet pipe (101 b-1) and the second ball outlet pipe (101 b-2);
A first bearing table (101 c) is formed at the joint of the first bearing space (K11) and the first ball sending space (K12), a second bearing table (101 d) is formed at the joint of the second bearing space (K21) and the second ball sending space (K22), and the first bearing table (101 c) and the second bearing table (101 d) are identical in size and flush in end face;
One end of the pressure-bearing box body (101) far away from the end flange (102) is also provided with a collimation hole (101 e);
The first rotor (201) comprises a first rotating shaft (201 a), a first gear (201 b), a first bearing seat (201 c), a first rotating disc (201 d) and a connecting shaft (201 e), wherein the first gear (201 b) is sleeved outside the first rotating shaft (201 a), and the end part of the connecting shaft (201 e) can be matched and inserted into the working end of the magnetic synchronizer (304);
The two ends of the first rotary table (201 d) are respectively connected with a first bearing seat (201 d-1) and a second bearing seat (201 d-2), two ends of a first rotary shaft (201 a) are respectively and fixedly connected with the first bearing seat (201 d-1) and a connecting shaft (201 e), a first bearing (201 d-1 a) and a second bearing (201 d-2 a) are respectively and rotatably sleeved outside the first bearing seat (201 d-1) and the second bearing seat (201 d-2 a), and a first bearing seat (201 c) is fixedly sleeved on the first bearing (201 d-1 a) and is detachably connected with a first bearing table (101 c);
The side wall of the first turntable (201 d) is provided with a ball receiving cup (201 d-3), the bottom of the ball receiving cup (201 d-3) is connected with a bearing table (201 d-4), and a dust collecting groove (201 d-5) is formed between the top end of the bearing table (201 d-4) and the bottom space of the ball receiving cup (201 d-3);
The second rotor (202) comprises a second rotating shaft (202 a), a second gear (202 b), a second bearing seat (202 c) and a second rotary table (202 d), the second gear (202 b) is sleeved at the end part of the second rotating shaft (202 a), and the second gear (202 b) is meshed with the first gear (201 b);
The two end parts of the second turntable (202 d) are connected with a third bearing seat (202 d-1) and a fourth bearing seat (202 d-2), the end part of the second rotating shaft (202 a) is fixedly connected with the third bearing seat (202 d-1), a third bearing (202 d-1 a) and a fourth bearing (202 d-2 a) are respectively and rotatably sleeved outside the third bearing seat (202 d-1) and the fourth bearing seat (202 d-2), and the second bearing seat (202 c) is fixedly sleeved on the third bearing seat (202 d-1 a) and is detachably connected with the second bearing seat (101 d);
the second turntable (202 d) is radially provided with a through hole (202 d-3) in a penetrating mode, the axis of the through hole (202 d-3) is coincident with the axis of the ball receiving cup (201 d-3), and the inner diameters of the through hole and the ball receiving cup are equal.
2. The fuel element flow blocking, positioning and dispensing device for a high temperature gas cooled reactor of claim 1, wherein: the middle part of the end flange (102) is provided with a through hole (102 a), the supporting ring (401) is connected in the through hole (102 a) in an embedded mode, the circumferential side wall of the supporting ring (401) is provided with a placing hole (401 a), and the pawl (402) is hinged in the placing hole (401 a);
The side wall of the ratchet wheel (403) is fixedly connected with a ratchet (403 a), the working end of the pawl (402) is indirectly clamped with the ratchet (403 a), and the ratchet wheel (403) is fixedly sleeved on the connecting shaft (201 e).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311290478.8A CN117594268B (en) | 2023-10-08 | 2023-10-08 | Fuel element flow blocking, positioning and distributing device applied to high-temperature gas cooled reactor |
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| CN202311290478.8A CN117594268B (en) | 2023-10-08 | 2023-10-08 | Fuel element flow blocking, positioning and distributing device applied to high-temperature gas cooled reactor |
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| CN109785985A (en) * | 2018-12-30 | 2019-05-21 | 清华大学 | A kind of ball type device detection positioning device |
| CN115083644A (en) * | 2022-06-20 | 2022-09-20 | 华能核能技术研究院有限公司 | High-temperature gas cooled reactor passing ball flow choking device capable of operating in one direction |
| CN217606563U (en) * | 2022-06-01 | 2022-10-18 | 华能核能技术研究院有限公司 | Ball passing flow blocking device with ball clamping fault online removing function and gas cooled reactor |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3432388A (en) * | 1967-06-09 | 1969-03-11 | Atomic Energy Commission | Nuclear reactor system with fission gas removal |
| US3855061A (en) * | 1968-02-28 | 1974-12-17 | Grace W R & Co | Nuclear reactor fuel plate |
| GB1366285A (en) * | 1973-07-09 | 1974-09-11 | Pedrick A P | Control system for regulating the speed of deuterium-tritium tip ontrolled nuclear fusion reaction |
| EP1509748B1 (en) * | 2002-05-13 | 2008-04-16 | Pebble Bed Modular Reactor (Proprietary) Limited | A method of discharging spherical elements from a container and a dispensing apparatus |
| CN217606564U (en) * | 2022-06-01 | 2022-10-18 | 华能核能技术研究院有限公司 | Flow plug |
| CN114974632A (en) * | 2022-06-30 | 2022-08-30 | 华能核能技术研究院有限公司 | Flow plug |
| CN115295196A (en) * | 2022-08-15 | 2022-11-04 | 清华大学 | Flow choking device for ball bed high temperature reactor |
| CN115274166A (en) * | 2022-08-15 | 2022-11-01 | 清华大学 | Bridging device for pebble-bed high-temperature reactor |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109785985A (en) * | 2018-12-30 | 2019-05-21 | 清华大学 | A kind of ball type device detection positioning device |
| CN217606563U (en) * | 2022-06-01 | 2022-10-18 | 华能核能技术研究院有限公司 | Ball passing flow blocking device with ball clamping fault online removing function and gas cooled reactor |
| CN115083644A (en) * | 2022-06-20 | 2022-09-20 | 华能核能技术研究院有限公司 | High-temperature gas cooled reactor passing ball flow choking device capable of operating in one direction |
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