CN114155981A - Delayed release device for neutron absorption element of space reactor - Google Patents
Delayed release device for neutron absorption element of space reactor Download PDFInfo
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- CN114155981A CN114155981A CN202111253687.6A CN202111253687A CN114155981A CN 114155981 A CN114155981 A CN 114155981A CN 202111253687 A CN202111253687 A CN 202111253687A CN 114155981 A CN114155981 A CN 114155981A
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 43
- 230000003111 delayed effect Effects 0.000 title claims abstract description 19
- 238000003860 storage Methods 0.000 claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 9
- 230000033001 locomotion Effects 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract 1
- 230000009471 action Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 230000000694 effects Effects 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000009257 reactivity Effects 0.000 description 3
- 239000006096 absorbing agent Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 1
- 241000270295 Serpentes Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/12—Means for moving control elements to desired position
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- 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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- Chemical & Material Sciences (AREA)
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- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Particle Accelerators (AREA)
Abstract
The invention discloses a delayed release device for neutron absorption elements in a space reactor, which comprises a storage tube, a driving mechanism, a piston and a rail arranged on the inner wall of the storage tube, wherein the driving mechanism comprises a driving spring; the track comprises a plurality of groove bodies, each groove body is spirally arranged along the length direction of the storage pipe, the groove bodies are uniformly distributed along the circumference of the inner wall of the storage pipe, a plurality of clamping grooves matched with the groove bodies are formed in the outer portion of the piston, the piston is installed on the track through the clamping grooves, and the clamping grooves and the groove bodies are arranged in a one-to-one correspondence mode; the neutron absorbing element is disposed within the storage tube and is pushed out of the storage tube by the piston as the piston moves along the track. This patent is through the track that adopts special construction, for neutron absorbing element's drive piston provides stable resistance, increases the motion route of piston simultaneously, realizes neutron absorbing element's delay release function.
Description
Technical Field
The invention relates to the technical field of space nuclear reactors, in particular to a delayed release device for a neutron absorption element of a space reactor.
Background
Nuclear power sources are particularly well suited for certain tasks in outer space due to their small size, long life, and other characteristics. The nuclear power supply of the space reactor has great advantages and application prospects in the fields of power supply of a ground-surrounding satellite, power supply of a deep space exploration propeller, power supply of a moon base and a mars base and the like.
The reactivity control mechanism has the functions of adjusting the reactivity of the nuclear reactor under the normal operation condition to realize power regulation and control, and driving the safety rod to quickly reset under the accident condition to realize quick emergency shutdown. The nuclear reactor on the ground is controlled by electromagnetic control rod and safety rod, and its operation mode is that it can be up-down linearly reciprocated. The rod dropping action of the control rod and the safety rod is realized by the action of gravity. For the space pile, the gravity action of the earth is very small, and the rod falling can be realized only by utilizing an energy storage device. When the space reactor is started, the neutron absorption element in the reactivity control system needs to realize delayed release so as to ensure the stability of the reactor. If the nuclear reaction control of the space reactor also adopts the electrification driving control technology of the land reactor, the volume and the weight of the control system are greatly increased, and the reliability of the control system is reduced.
Disclosure of Invention
In order to solve the technical problems, the invention provides a delayed release device for a neutron absorption element of a space reactor, which realizes delayed release of the neutron absorption element by utilizing the physical characteristics of mechanical motion, avoids the defects of an electrical control system, realizes light weight of equipment, provides stable resistance for a driving piston of the neutron absorption element by adopting a track with a special structure, and simultaneously increases the motion path of the piston to realize the delayed release function of the neutron absorption element.
The technical scheme adopted by the invention is as follows: a delayed release device for neutron absorption elements in a space reactor comprises a storage tube, a driving mechanism arranged in the storage tube, a piston and a rail arranged on the inner wall of the storage tube, wherein the driving mechanism comprises a driving spring, the piston is arranged at the output end of the driving spring, and the piston is arranged on the rail;
the track comprises a plurality of groove bodies, each groove body is spirally arranged along the length direction of the storage pipe, the groove bodies are uniformly distributed along the circumference of the inner wall of the storage pipe, a plurality of clamping grooves matched with the groove bodies are formed in the outer portion of the piston, the piston is installed on the track through the clamping grooves, and the clamping grooves and the groove bodies are arranged in a one-to-one correspondence mode; the neutron absorbing element is disposed within the storage tube and is pushed out of the storage tube by the piston as the piston moves along the track.
Further, the groove body is a groove, and the clamping groove is a boss matched with the groove body.
Further, the groove body is a boss, and the clamping groove is a groove matched with the groove body.
Further, the cross-sectional shape of the groove body can be any one of arc, rectangle, trapezoid and triangle.
Further, the helix angle of the groove body is 30-75 degrees.
Furthermore, the friction coefficient between the piston and the neutron absorption element is 0.3-0.7.
The beneficial effects of this patent are shown in following aspect: the spiral track (or the snake track) is arranged in the storage tube, so that the purposes of increasing the resistance of the piston and prolonging the motion path of the piston so as to increase the release time of the neutron absorption element are achieved, and the stable starting of the reactor is ensured.
Drawings
FIG. 1 is a schematic structural view of the invention;
the neutron absorption device comprises a graphic mark 1, a storage tube 2, a driving spring 3, a piston 4, a clamping groove 5, a groove body 6 and a neutron absorption element.
Detailed Description
The present invention will be described in further detail with reference to the drawings and specific examples, but the present invention is not limited thereto.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "lateral", "longitudinal", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
A delayed release device for neutron absorption elements in a space reactor comprises a storage tube 1, a driving mechanism arranged in the storage tube 1, a piston 3 and a rail arranged on the inner wall of the storage tube 1, wherein the driving mechanism comprises a driving spring 2, the piston 3 is arranged at the output end of the driving spring 2, and the piston 3 is arranged on the rail;
the track comprises a plurality of groove bodies 5, each groove body 5 is spirally arranged along the length direction of the storage pipe 1, the groove bodies 5 are uniformly distributed along the circumference of the inner wall of the storage pipe 1, a plurality of clamping grooves 4 matched with the groove bodies 5 are arranged outside the piston 3, the piston 3 is arranged on the track through the clamping grooves 4, and the clamping grooves 4 are arranged in one-to-one correspondence with the groove bodies 5; the neutron absorbing element 6 is arranged in the storage tube 1, and the neutron absorbing element 6 is pushed out of the storage tube 1 by the piston 3 as the piston 3 moves along the track;
the groove body 5 is a groove, and the clamping groove 4 is a boss matched with the groove body 5. The groove body 5 is a boss, and the clamping groove 4 is a groove matched with the groove body 5. The cross section of the trough body 5 can be any one of arc, rectangle, trapezoid and triangle. The helical angle of the groove body 5 is 30-75 degrees. The coefficient of friction between the piston 3 and the neutron absorption element 6 is 0.3 to 0.7.
The utility model provides a space reactor neutron absorption component delay release, through set up helical track (or snakelike track) in the reserve tube, realizes increasing the piston resistance, prolongs thereby the purpose that the neutron absorption component release time is increased in the extension piston motion route, specifically includes the following step:
(1) processing a spiral groove body 5-groove (or a lug boss) on the inner wall of the reactive element storage tube;
(2) processing a clamping groove 4-boss (or a groove) on the excircle of the piston, and ensuring that the distribution positions of the clamping groove 4-boss (or the groove) on the piston and a groove body 5-groove (or a boss) of the storage tube are kept consistent;
(3) when the neutron absorption element ejection device is installed, the clamping groove 4 of the piston is aligned to the groove body 5 of the storage tube and rotationally arranged in a preset position, when the neutron absorption element is required to eject, the piston generates friction force between the boss and the groove under the action of the elastic force of the driving spring 2, and generates friction resistance with the neutron absorption element in front when the piston rotates, so that the delayed ejection of the neutron absorption element is ensured.
A groove body 5-boss (or a groove) is machined on the excircle of the piston, and the distribution positions of the groove body 5-boss (or the groove) on the piston and a clamping groove 4-groove (or boss) of the storage tube are kept consistent, so that the piston is prevented from being blocked in the advancing process.
The roughness of the contact surface between the piston and the neutron absorption element is controlled, and the friction coefficient between the piston and the neutron absorption element is ensured to be 0.3-0.7.
A delayed release device for neutron absorption elements in a space stack is shown in the attached drawings. The inner wall of a storage tube 1 for storing the neutron absorption element is provided with a spiral groove track (or a snake-shaped track), the outer side of a piston 3 is provided with a corresponding boss, the piston is restrained to advance along the track in a rotating mode by means of matching of the boss and the groove, and the purposes of increasing resistance and prolonging the release time of the motion path of the pressurized neutron absorption element are achieved.
When the neutron absorption element needs to be ejected, the boss at the edge of the piston 3 is meshed with the groove on the inner wall of the storage tube 1 under the action of the elastic force of the driving spring 2, so that the piston slowly rotates along the spiral track and is ejected, and the piston is contacted with the storage tube 1 to generate frictional resistance f 1; meanwhile, the piston pushes the neutron absorption element 6 in front to advance synchronously, the piston rotates relative to the neutron absorption element in the advancing process, and the piston 3 is in contact with the neutron absorption element 6 to generate frictional resistance f 2. The frictional resistance f2 is proportional to the force of the piston pushing the neutron absorbing element: and f2 is a resistance for restricting the rotational advance of the piston, which can effectively restrict the rotational advance speed of the piston. The combined action of the resistance forces f1 and f2 can ensure the slow release of the neutron absorption element 6, thereby ensuring the smooth startup of the reactor.
The method specifically comprises the following steps:
(1) a double spiral groove (equivalent to a groove body) is formed at a position 180 degrees opposite to the inner wall of the reactive element storage tube 1;
(2) processing bosses on two sides (equivalent to clamping grooves) at the position of 180 degrees opposite to the excircle of the piston 3;
(3) when the piston is installed, bosses on two sides of the piston 3 are aligned with the grooves of the outer tube and are rotatably installed in preset positions.
The invention can control the ejection time by controlling the pitch of the spiral channel, namely the spiral angle, or changing the section shape of the channel to control the friction resistance of the piston movement and the movement path of the piston.
The form of the groove body can be round, rectangular, trapezoidal, triangular and the like, and can also be other shapes; the number of tracks (number of troughs) may also be 3 or more; grooves (clamping grooves) can be formed in the two sides of the piston, and a spiral boss (groove body) is formed in the inner wall of the storage pipe 1, so that the piston groove moves spirally along the pipeline; the spiral track structure in the invention can be changed into a snake-shaped structure; none of the foregoing changes affect the implementation of functionality.
Fig. 1 is a delayed ejection schematic diagram of a neutron absorption element, the neutron absorption element is arranged on the right side of a piston, after an action signal is received, an elastic force is released by a driving spring 2, the piston 3 is pushed and slowly rotates and advances under the guiding action of a spiral track (or a snake-shaped track), and the neutron absorption element 6 is ejected out of a reactor core to realize the startup of the reactor. This patent provides stable resistance for drive spring 2 provides when popping out under the high temperature condition, realizes that the delay of neutron absorption component pops out the function.
Example 1
The invention is adopted to manufacture the double-helix channel with the rectangular section, and when the helix angle is 70 degrees, the implementation process is as follows:
(1) processing double-spiral grooves on the inner wall of the reactive element storage tube, wherein the grooves are symmetrically distributed in the tube at 180 degrees, the cross section of each groove is rectangular, and the helix angle of each groove is 70 degrees;
(2) a rectangular boss is arranged on the excircle of the piston at an angle of 180 degrees;
(3) after the pipeline is internally provided with a spring, bosses at two sides of the piston are aligned with the groove of the outer pipe and are rotatably arranged at preset positions, and a simulated neutron absorption element is arranged in the right space of the piston.
The implementation effect is as follows: this embodiment works well with a release time of 4 seconds for the neutron absorbing element.
Example 2
The method adopts a double-spiral channel with a rectangular section, and when the helix angle is 60 degrees, the implementation process is as follows:
(1) processing double-spiral grooves on the inner wall of the reactive element storage tube, wherein the grooves are symmetrically distributed in the tube at 180 degrees, the cross section of each groove is rectangular, and the helix angle of each groove is 60 degrees;
(2) a rectangular boss is arranged on the excircle of the piston at an angle of 180 degrees;
(3) after the pipeline is internally provided with a spring, bosses at two sides of the piston are aligned with the groove of the outer pipe and are rotatably arranged at preset positions, and a simulated neutron absorption element is arranged in the right space of the piston.
The implementation effect is as follows: this embodiment works well with a release time of the neutron absorber element of 9 seconds.
Example 3
Adopts a double-helix channel with a rectangular section, when the helix angle is 45 degrees,
(1) processing double-spiral grooves on the inner wall of the reactive element storage tube, wherein the grooves are symmetrically distributed in the tube at 180 degrees, the cross section of each groove is rectangular, and the helix angle of each groove is 45 degrees;
(2) a rectangular boss is arranged on the excircle of the piston at an angle of 180 degrees;
(3) after the pipeline is internally provided with a spring, bosses at two sides of the piston are aligned with the groove of the outer pipe and are rotatably arranged at preset positions, and a simulated neutron absorption element is arranged in the right space of the piston.
The implementation effect is as follows: this embodiment works well with a release time of 14 seconds for the neutron absorbing element.
Example 4
The invention is adopted to manufacture the double-helix channel with the triangular section, and when the helix angle is 60 degrees, the implementation process is as follows:
(1) processing double-spiral grooves on the inner wall of the reactive element storage tube, wherein the grooves are symmetrically distributed in the tube at 180 degrees, the cross section of each groove is an equilateral triangle, and the helix angle of each groove is 60 degrees;
(2) an equilateral triangle boss is arranged on the excircle of the piston opposite to 180 degrees;
(3) after the pipeline is internally provided with a spring, bosses at two sides of the piston are aligned with the groove of the outer pipe and are rotatably arranged at preset positions, and a simulated neutron absorption element is arranged in the right space of the piston.
The implementation effect is as follows: this embodiment works well with a release time of the neutron absorber element of 9 seconds. The effect is achieved.
Example 5
The invention is adopted to manufacture the spiral 4 channel with the triangular section, and when the helix angle is 60 degrees, the implementation process is as follows:
(1) 4 spiral grooves are processed on the inner wall of the reactive element storage tube, the grooves are uniformly distributed in the tube at intervals of 90 degrees, the sections of the grooves are equilateral triangles, and the helix angle of each groove is 60 degrees;
(2) 4 equilateral triangle bosses are uniformly processed on the excircle of the piston at 90 degrees;
(3) after the pipeline is internally provided with a spring, bosses at two sides of the piston are aligned with the groove of the outer pipe and are rotatably arranged at preset positions, and a simulated neutron absorption element is arranged in the right space of the piston.
The implementation effect is as follows: the mode has good implementation effect, the release time of the neutron absorption element is 10 seconds, the system runs more stably after 4 channels are adopted, and the noise and the vibration are greatly reduced.
The device of the present invention may have other forms than the above-described embodiments, and it should be understood that any simple modification, equivalent change and modification made to the above-described embodiments according to the technical spirit of the present invention fall within the scope of the present invention.
Claims (6)
1. A delayed release device for neutron-absorbing elements in a space stack, characterized in that: the device comprises a storage pipe, a driving mechanism arranged in the storage pipe, a piston and a rail arranged on the inner wall of the storage pipe, wherein the driving mechanism comprises a driving spring, the piston is arranged at the output end of the driving spring, and the piston is arranged on the rail;
the track comprises a plurality of groove bodies, each groove body is spirally arranged along the length direction of the storage pipe, the groove bodies are uniformly distributed along the circumference of the inner wall of the storage pipe, a plurality of clamping grooves matched with the groove bodies are formed in the outer portion of the piston, the piston is installed on the track through the clamping grooves, and the clamping grooves and the groove bodies are arranged in a one-to-one correspondence mode; the neutron absorbing element is disposed within the storage tube and is pushed out of the storage tube by the piston as the piston moves along the track.
2. The delayed release apparatus of a space stack neutron-absorbing element of claim 1, wherein: the groove body is a groove, and the clamping groove is a boss matched with the groove body.
3. The delayed release apparatus of a space stack neutron-absorbing element of claim 1, wherein: the groove body is a boss, and the clamping groove is a groove matched with the groove body.
4. The delayed release device for neutron-absorbing elements in a space stack according to any one of claims 2 to 3, wherein: the cross section of the groove body can be any one of arc, rectangle, trapezoid and triangle.
5. The delayed release apparatus of a space stack neutron-absorbing element of claim 1, wherein: the helical angle of the groove body is 30-75 degrees.
6. The delayed release apparatus of a space stack neutron-absorbing element of claim 1, wherein: the friction coefficient between the piston and the neutron absorption element is 0.3-0.7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111253687.6A CN114155981A (en) | 2021-10-27 | 2021-10-27 | Delayed release device for neutron absorption element of space reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111253687.6A CN114155981A (en) | 2021-10-27 | 2021-10-27 | Delayed release device for neutron absorption element of space reactor |
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| Publication Number | Publication Date |
|---|---|
| CN114155981A true CN114155981A (en) | 2022-03-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111253687.6A Pending CN114155981A (en) | 2021-10-27 | 2021-10-27 | Delayed release device for neutron absorption element of space reactor |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3031397A (en) * | 1958-08-07 | 1962-04-24 | Fortescue Peter | Reactor control |
| CN87105533A (en) * | 1986-08-13 | 1988-02-24 | 法码通 | Neutron absorbing rod damping unit |
| US5076995A (en) * | 1986-12-10 | 1991-12-31 | Framatome | Shock damping device for neutron absorbing bars |
| US6372189B1 (en) * | 1999-04-30 | 2002-04-16 | Emc Corporation | Ejector discharge safety chute |
| CN106061442A (en) * | 2013-10-01 | 2016-10-26 | 拜耳医药保健有限责任公司 | Impact force dampening of spring release |
| CN107035642A (en) * | 2017-04-18 | 2017-08-11 | 深圳市科睿精密科技有限公司 | Piston pump |
| CN109072886A (en) * | 2016-02-23 | 2018-12-21 | 耐科斯特资源有限责任公司 | Energy storage device |
| CN110718307A (en) * | 2019-10-17 | 2020-01-21 | 中国科学院合肥物质科学研究院 | Pre-stored energy reactivity control mechanism |
-
2021
- 2021-10-27 CN CN202111253687.6A patent/CN114155981A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3031397A (en) * | 1958-08-07 | 1962-04-24 | Fortescue Peter | Reactor control |
| CN87105533A (en) * | 1986-08-13 | 1988-02-24 | 法码通 | Neutron absorbing rod damping unit |
| US4826648A (en) * | 1986-08-13 | 1989-05-02 | Framatome | Neutron absorbing bar damping device |
| US5076995A (en) * | 1986-12-10 | 1991-12-31 | Framatome | Shock damping device for neutron absorbing bars |
| US6372189B1 (en) * | 1999-04-30 | 2002-04-16 | Emc Corporation | Ejector discharge safety chute |
| CN106061442A (en) * | 2013-10-01 | 2016-10-26 | 拜耳医药保健有限责任公司 | Impact force dampening of spring release |
| CN109072886A (en) * | 2016-02-23 | 2018-12-21 | 耐科斯特资源有限责任公司 | Energy storage device |
| CN107035642A (en) * | 2017-04-18 | 2017-08-11 | 深圳市科睿精密科技有限公司 | Piston pump |
| CN110718307A (en) * | 2019-10-17 | 2020-01-21 | 中国科学院合肥物质科学研究院 | Pre-stored energy reactivity control mechanism |
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