CN108922638A - A kind of control rod drive mechanism with auxiliary scram device - Google Patents
A kind of control rod drive mechanism with auxiliary scram device Download PDFInfo
- Publication number
- CN108922638A CN108922638A CN201810823923.5A CN201810823923A CN108922638A CN 108922638 A CN108922638 A CN 108922638A CN 201810823923 A CN201810823923 A CN 201810823923A CN 108922638 A CN108922638 A CN 108922638A
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- Prior art keywords
- scram
- control rod
- spring
- auxiliary
- drive mechanism
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- 239000000523 sample Substances 0.000 claims abstract description 10
- 230000003139 buffering effect Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 238000004146 energy storage Methods 0.000 claims description 2
- 238000009987 spinning Methods 0.000 claims 2
- 238000007667 floating Methods 0.000 abstract description 4
- 238000000034 method Methods 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000004992 fission Effects 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 210000003781 tooth socket Anatomy 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- 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
- G21C7/14—Mechanical drive arrangements
-
- 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)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Toys (AREA)
- Buildings Adapted To Withstand Abnormal External Influences (AREA)
Abstract
The present invention provides a kind of control rod drive mechanism with auxiliary scram device comprising：Stick location probe component is installed on driving throw of lever casing；Coil block is connected with the lower end of the stick location probe component；Cover the actuating arm assembly in the driving throw of lever inside pipe casing；It is mounted on the indoor hook component of the pressure-resistant shell component hook；The actuating arm assembly is passed through from the hook component, and lower end is connected by disconnecting head with the planet carrier of the control rod；Auxiliary scram device positioned at the control rod drive mechanism lower end, the lower end face contact of auxiliary the scram device upper surface and the hook component, the guide cylinder upper end face contact of lower end surface and control rod.The driving mechanism shortens rod drop time；It is able to achieve control rod inclination and waves the scram movement under operating condition；Quick scram shutdown can be met under earthquake or emergency episode operating condition；And it can be suitably used on ocean floating platform.
Description
Technical field
The present invention relates to nuclear power generating equipment technical field more particularly to a kind of control rod driving machines with auxiliary scram device
Structure.
Background technique
So-called nuclear power control rod is usually to be easy to absorb made of the material of neutron boron and cadmium etc..Nuclear reaction pressure vessel
There is a set of mechanical device can be with manipulation and control stick outside.When control rod is fully inserted into reaction center, a large amount of neutrons can be absorbed, with resistance
The only progress of fission chain reaction.If control rod is extracted a bit, reactor begins to operate, and the speed of chain reaction reaches
Certain stationary value；If it is desired to increasing the energy of reactor release, control rod need to only be extracted out again a bit, it is absorbed in this way in
Son is reduced, and has more neutrons to participate in fission reaction.The progress for stopping chain reaction, control rod is fully inserted into nuclear reaction
The heart sponges most of neutron.In nuclear reaction control process, the driving mechanism of control rod is played a crucial role.
The magnetic force hoisting type control rod drive mechanism that the country uses at present, by components such as control rod and drive rods when scram
Scram is realized in self weight, without other additional auxiliary scram structures, be can satisfy scram in normal operating conditions and is required, but
Earthquake is tilted or is waved etc. under complex working conditions, since control rod drive mechanism is in weightless or heeling condition, by self weight nothing
Method meets rod drop time requirement, or even can not scram.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of control rod driving machine with auxiliary scram device
Structure solves the problems, such as that existing control rod drive mechanism cannot achieve quick scram when the operating conditions such as waving, tilting.
In order to solve the above technical problem, the present invention provides it is a kind of with auxiliary scram device control rod drive mechanism,
It may include：
Stick location probe component is installed on driving throw of lever casing；
Coil block is connected with the lower end of the stick location probe component；
Cover the actuating arm assembly in the driving throw of lever inside pipe casing；
It is mounted on the indoor hook component of the pressure-resistant shell component hook, hook component both ends use necking down structure；
The actuating arm assembly is passed through from the hook component, and lower end is by disconnecting planet carrier phase of the head with the control rod
Even；
Auxiliary scram device positioned at the control rod drive mechanism lower end, the auxiliary scram device upper surface and the hook
The guide cylinder upper end face contact of the lower end face contact of component, lower end surface and control rod.
In an alternate embodiment of the invention, the auxiliary scram device is from top to down by upper spring seat, scram spring, lower spring cup
And horn cover is constituted.
In an alternate embodiment of the invention, the scram spring is mounted on the lower end of the hook component, the entire scram bullet
Spring covers on the drive rod of the actuating arm assembly, passes vertically through lower section, the upper bullet of the pressure-resistant shell component from top to down
Spring abutment, CRDM tube socket and the horn cover, finally cover in the inner tube of the lower spring cup.
In an alternate embodiment of the invention, the parameter of the scram spring is according to the model difference corresponding selection of control rod.
In an alternate embodiment of the invention, the upper spring seat is mounted in the inner cavity of the pressure-resistant shell component lower section.
In an alternate embodiment of the invention, the guide cylinder upper surface of the control rod is located in the lower spring cup, under described
The inner tube of spring base to it is lower and on across the horn cover and extend to the pneumatic shell component internal；The institute of the lower spring cup
Inner tube set is stated on the drive rod of the actuating arm assembly.
In an alternate embodiment of the invention, the upper section of the scram spring carries out outer guiding, lower section by the pressure-resistant shell component
Interior guiding is carried out by the lower spring cup.
In an alternate embodiment of the invention, be provided with the gutter channel of perforation in the upper spring seat circumferential direction, the direction of fluting perpendicular to
The axis of the upper spring seat.
In an alternate embodiment of the invention, helicla flute, the scram spring rotation are circumferentially provided on the upper spring seat excircle
Loaded on the helicla flute.
In an alternate embodiment of the invention, the scram spring is welded on the upper spring seat.
In an alternate embodiment of the invention, be provided with the gutter channel of perforation in the lower spring cup circumferential direction, the direction of fluting perpendicular to
The axis of the lower spring cup.
In an alternate embodiment of the invention, helicla flute, the scram spring rotation are circumferentially provided on the lower spring cup excircle
Loaded on the helicla flute.
In an alternate embodiment of the invention, the scram spring is welded on the lower spring cup.
In an alternate embodiment of the invention, the drive rod of the actuating arm assembly is designed as ladder shaft shoulder structure.
In an alternate embodiment of the invention, compress energy storage state is under the scram spring nominal situation.
In an alternate embodiment of the invention, the inner hole both ends of the upper spring seat and lower spring cup are designed as chamfering or fillet knot
Structure.
In an alternate embodiment of the invention, shaking of the necking down structure of the hook component to limit the actuating arm assembly；
Adjusting ring is set in the hook component, buffering adjusting is carried out for the actuating arm assembly stroke.
In summary, the beneficial effect of the embodiment of the present invention is：Control rod with auxiliary scram device of the invention
Driving mechanism shortens rod drop time；It is able to achieve control rod inclination and waves the scram movement under operating condition；It can be in earthquake or tight
Meet quick scram shutdown under anxious accident conditions；And it can be suitably used on ocean floating platform.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is a kind of assembly signal of one embodiment of the control rod drive mechanism with auxiliary scram device of the present invention
Figure.
Fig. 2 is to assist scram in a kind of one embodiment of the control rod drive mechanism with auxiliary scram device of the present invention
Schematic device.
Fig. 3 is the transverse sectional view and longitudinal sectional view of the upper spring seat in Fig. 2.
Fig. 4 is the transverse sectional view and longitudinal sectional view of the lower spring cup in Fig. 2.
Specific embodiment
The explanation of following embodiment be with reference to attached drawing, can be to the specific embodiment implemented to the example present invention.
The embodiment of the present invention provides a kind of control rod drive mechanism with auxiliary scram device, such as the installation diagram of Fig. 1
It is shown, it from top to down may include being constituted with lower component：
Stick location probe component 3, driving throw of lever casing 4, pressure-resistant shell component 5, hook component 6, coil block 7, group of drive rods
Part 8 and auxiliary scram device 9；Pass through the RPI electric connector 1 and active line of control rod drive mechanism upper end in the operating condition
It encloses electric connector 2 and connects working power.
Wherein, stick location probe component 3 is installed on driving throw of lever casing 4, the lower end of stick location probe component 3 and line
Coil assembly 7 is connected, and the magnetic yoke bushing of coil block 7 supports entire stick location probe component 3；4 sets of throw of lever casing is driven to exist
The outside of actuating arm assembly 8；Hook component 6 is mounted in the hook room of pressure-resistant shell component 5, and actuating arm assembly 8 is from hook component 6
In pass through, the lower end of actuating arm assembly 8 is by disconnecting head and control rod（Non- standard）Planet carrier be connected；Assist scram device 9
Positioned at the lower end of control rod drive mechanism, the upper surface of scram device 9 and the lower end face contact of hook component 6 are assisted, auxiliary is fallen
The lower end surface of bar device 9 and the guide cylinder of control rod（It does not mark）Upper end face contact.
The both ends of hook component 6 of the invention are all made of necking down structure, can effectively guarantee actuating arm assembly 8 promoted and
Stability during underthrust, the shaking of actuating arm assembly 8 caused by avoiding fit clearance excessive, so that control rod can
Adapt to the operating condition of all kinds of complexity.In the present embodiment, it is provided with uniform tooth socket in the upper section of actuating arm assembly 8, hook component 6 exists
Under the control of 7 power on/off of coil block, the tooth socket of actuating arm assembly 8 is swung in or shows, to realize mentioning to actuating arm assembly 8
It rises, underthrust and scram act.Of course for security consideration, it is necessary to which setting adjusts ring in hook component 6, for the drive rod
Component stroke carries out buffering adjusting.
Further, as shown in Fig. 2, auxiliary 9 main member of scram device has：Upper spring seat 91, scram spring 92, lower spring
Seat 93 and horn cover 94.Wherein, the upper end of scram spring 92 is mounted on the lower end of hook component 6,92 sets of entire scram spring
On the drive rod of actuating arm assembly 8, the lower section, upper spring seat 91, CRDM tube socket of pressure-resistant shell component 5 are passed vertically through from top to down
11 and horn cover 94, it finally covers in the inner tube of lower spring cup 93.Upper spring seat 91 is mounted in the lower section of pressure-resistant shell component 5
In chamber, the axial position of upper spring seat 91 is limited by the positioning ring of 6 lower end of hook component, and the neck of upper spring seat 91 is to position
Then limited by pressure-resistant shell component 5；Lower spring cup 93 is then located at the upper surface of control rod guide tubes and bundles 10, lower spring cup 93
Inner tube to it is lower and on extend to inside pressure-resistant shell component 5 across horn cover 94；The inner tube set of lower spring cup 93 is in actuating arm assembly 8
Drive rod on.Such structure makes the pressure-resistant shell component 5 of upper section dependence of scram spring 92 be oriented to outside, scram spring 92
Lower section carry out interior guiding by lower spring cup 93, and lower spring cup 93 is oriented to and is limited bias by horn cover 94,
During scram, it is limited solve scram spring 92 it is too long and caused by unstability and eccentricity issues.
Further, as shown in figure 3, being provided with gutter channel 911 on the circumference of upper spring seat 91, which is through slot,
Axis of its fluting direction perpendicular to upper spring seat 91；In the present embodiment, gutter channel 911 shares 4, is evenly spaced in bullet
On the circumference of spring abutment 91.In addition, multiple helicla flutes 912 are circumferentially provided on the excircle of upper spring seat 91, each helicla flute 912
Between pitch it is different from the pitch of scram spring 92, by 92 precession of scram spring, the helicla flute 912 can be by scram spring 92
It is mounted on upper spring seat 91；Certainly in other embodiments, which can also be directly welded at upper spring seat 91
On, in order to further prevent scram spring 92 to fall off from upper spring seat 91, can also scram spring 92 collar circumference with
The multiple solder joints of spot welding are on 91 contact surface of upper spring seat to increase firmness.
Further, as shown in figure 4, being provided with gutter channel 931 on the circumference of lower spring cup 93, which is through slot,
Axis of its fluting direction perpendicular to lower spring cup 93；In the present embodiment, gutter channel 931 shares 4, is evenly spaced in lower bullet
On the circumference of spring abutment 93.In addition, multiple helicla flutes 932 are circumferentially provided on the excircle of lower spring cup 93, each helicla flute 932
Between pitch it is different from the pitch of scram spring 92, by 92 precession of scram spring, the helicla flute 932 can be by scram spring 92
It is mounted on lower spring cup 93；Certainly in other embodiments, which can also be directly welded at lower spring cup 93
On, in order to further prevent scram spring 92 to fall off from lower spring cup 93, can also scram spring 92 foundation ring circumference with
The multiple solder joints of spot welding are on 93 contact surface of lower spring cup to increase firmness.The gutter channel 931 and upper spring seat 91 of lower spring cup 93
Gutter channel 911 between can establish water stream channel.
Further, designing on drive rod has ladder shaft shoulder structure, can be lower spring baffle ring under working condition（It does not mark）It mentions
For support；In drive rod under electromagnetic action in lifting process, scram spring 92 is pressed under the action of the drive rod ladder shaft shoulder
Contracting accumulation of energy, when power-off occurring or emergency needs to carry out scram shutdown, scram spring 92 releases stress energy, generates edge
The motive force for driving line downward accelerates scram to reduce the probability that accident occurs.In addition it is put down when control rod is in ocean floating
When tilting or wave under operating condition caused by platform or earthquake etc., the structure of above auxiliary scram device 9 is enough to solve existing skill
The problem of art is unable to satisfy scram by self weight.In the present embodiment, at the inner hole both ends of upper spring seat 91 and lower spring cup 93
It is designed as chamfering or rounded structure, it can be to avoid collision of drive rod during up and down motion.Certainly it is needing to control not
With model control rod when, the parameter of the scram spring 92 in the control rod drive mechanism is needed according under various operating conditions
Rod drop time, which calculates, carries out Rational choice, must not only meet rod drop time requirement, but also must guarantee not cause excessive shock.
To sum up, driving mechanism of the invention is mounted on nuclear reactor pressure container top cover control rod drive mechanism tube socket
On, realized by control instruction control rod in reactor core is promoted, the operation such as underthrust, scram, to adjust reactor fortune
Row power, and in the case where needing emergency shut-down or reactor power supply system the accident conditions such as to power off suddenly, it may be implemented to fall rapidly
Stick makes the rapid shutdown of reactor, avoids accident.
By above description it is found that the beneficial effects of the present invention are：Control with auxiliary scram device of the invention
Rod drive mechanism shortens rod drop time；It is able to achieve control rod inclination and waves the scram movement under operating condition；Can in earthquake or
Meet quick scram shutdown under emergency episode operating condition；And it can be suitably used on ocean floating platform.
The above disclosure is only the preferred embodiments of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, therefore equivalent changes made in accordance with the claims of the present invention, is still within the scope of the present invention.
Claims (14)
1. a kind of control rod drive mechanism with auxiliary scram device, which is characterized in that include from top to down：
Stick location probe component is installed on driving throw of lever casing；
Coil block is connected with the lower end of the stick location probe component；
Cover the actuating arm assembly in the driving throw of lever inside pipe casing；
It is mounted on the indoor hook component of the pressure-resistant shell component hook, hook component both ends use necking down structure；
The actuating arm assembly is passed through from the hook component, and lower end is by disconnecting planet carrier phase of the head with the control rod
Even；
Auxiliary scram device positioned at the control rod drive mechanism lower end, the auxiliary scram device upper surface and the hook
The guide cylinder upper end face contact of the lower end face contact of component, lower end surface and control rod.
2. the control rod drive mechanism according to claim 1 with auxiliary scram device, which is characterized in that the auxiliary
Scram device is made of upper spring seat, scram spring, lower spring cup and horn cover from top to down.
3. the control rod drive mechanism according to claim 2 with auxiliary scram device, which is characterized in that the scram
Spring is mounted on the lower end of the hook component, the entire scram spring pocket on the drive rod of the actuating arm assembly, until
Lower section, the upper spring seat, CRDM tube socket and the horn cover of the pressure-resistant shell component are passed vertically through under above, it is final to cover
In the inner tube of the lower spring cup.
4. the control rod drive mechanism according to claim 3 with auxiliary scram device, which is characterized in that the scram
The parameter of spring is according to the model difference corresponding selection of control rod.
5. the control rod drive mechanism according to claim 2 with auxiliary scram device, which is characterized in that the upper bullet
Spring abutment is mounted in the inner cavity of the pressure-resistant shell component lower section.
6. the control rod drive mechanism according to claim 2 with auxiliary scram device, which is characterized in that under described
Spring base is located at the guide cylinder upper surface of the control rod, the inner tube of the lower spring cup to it is lower and on across the horn cover
And extend to the pneumatic shell component internal；The said inner tube of the lower spring cup covers the drive rod in the actuating arm assembly
On.
7. the control rod drive mechanism according to claim 3 with auxiliary scram device, which is characterized in that the scram
The upper section of spring carries out interior guiding by the lower spring cup by the pressure-resistant outer guiding of shell component progress, lower section.
8. the control rod drive mechanism according to claim 2 with auxiliary scram device, which is characterized in that the upper bullet
It is provided with the gutter channel of perforation in spring abutment circumferential direction, the axis of the direction of fluting perpendicular to the upper spring seat.
9. the control rod drive mechanism according to claim 2 with auxiliary scram device, which is characterized in that the upper bullet
Helicla flute is circumferentially provided on spring abutment excircle, the scram spring spinning is on the helicla flute；The scram spring welding
On the upper spring seat.
10. the control rod drive mechanism according to claim 2 with auxiliary scram device, which is characterized in that under described
It is provided with the gutter channel of perforation in spring base circumferential direction, the axis of the direction of fluting perpendicular to the lower spring cup.
11. the control rod drive mechanism according to claim 2 with auxiliary scram device, which is characterized in that under described
Helicla flute is circumferentially provided on spring base excircle, the scram spring spinning is on the helicla flute；The scram spring weldering
It connects on the lower spring cup.
12. the control rod drive mechanism according to claim 1 with auxiliary scram device, which is characterized in that the drive
The drive rod of lever component is designed as ladder shaft shoulder structure；Compress energy storage state is under the scram spring nominal situation.
13. the control rod drive mechanism according to claim 2 with auxiliary scram device, which is characterized in that on described
The inner hole both ends of spring base and lower spring cup are designed as chamfering or rounded structure.
14. according to claim 1 to 13 described in any item control rod drive mechanism with auxiliary scram device, feature exists
In shaking of the necking down structure of the hook component to limit the actuating arm assembly；Adjusting ring is set in the hook component,
Buffering adjusting is carried out for the actuating arm assembly stroke.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823923.5A CN108922638B (en) | 2018-07-25 | 2018-07-25 | Control rod driving mechanism with auxiliary rod falling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810823923.5A CN108922638B (en) | 2018-07-25 | 2018-07-25 | Control rod driving mechanism with auxiliary rod falling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108922638A true CN108922638A (en) | 2018-11-30 |
| CN108922638B CN108922638B (en) | 2024-05-17 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810823923.5A Active CN108922638B (en) | 2018-07-25 | 2018-07-25 | Control rod driving mechanism with auxiliary rod falling device |
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| Country | Link |
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| CN (1) | CN108922638B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111816332A (en) * | 2020-07-01 | 2020-10-23 | 中国核电工程有限公司 | Control rod and high-temperature gas cooled reactor |
| CN111916228A (en) * | 2020-07-31 | 2020-11-10 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Drive rod group on control rod drive mechanism and offshore reactor |
| CN112863703A (en) * | 2020-12-28 | 2021-05-28 | 中国原子能科学研究院 | Speed control device of control rod driving mechanism |
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| CN208873482U (en) * | 2018-07-25 | 2019-05-17 | 中广核研究院有限公司 | A kind of control rod drive mechanism with auxiliary scram device |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111816332B (en) * | 2020-07-01 | 2023-02-17 | 中国核电工程有限公司 | Control rod and high-temperature gas cooled reactor |
| CN111916228A (en) * | 2020-07-31 | 2020-11-10 | 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) | Drive rod group on control rod drive mechanism and offshore reactor |
| CN112863703A (en) * | 2020-12-28 | 2021-05-28 | 中国原子能科学研究院 | Speed control device of control rod driving mechanism |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108922638B (en) | 2024-05-17 |
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