CN105976887A - Slowing-down device shell cadmium layer coating method - Google Patents
Slowing-down device shell cadmium layer coating method Download PDFInfo
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- CN105976887A CN105976887A CN201610500798.5A CN201610500798A CN105976887A CN 105976887 A CN105976887 A CN 105976887A CN 201610500798 A CN201610500798 A CN 201610500798A CN 105976887 A CN105976887 A CN 105976887A
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- cadmium layer
- slowing
- cadmium
- down device
- layer
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21K—TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOT OTHERWISE PROVIDED FOR; IRRADIATION DEVICES; GAMMA RAY OR X-RAY MICROSCOPES
- G21K1/00—Arrangements for handling particles or ionising radiation, e.g. focusing or moderating
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- Spectroscopy & Molecular Physics (AREA)
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Arc Welding In General (AREA)
Abstract
The invention provides a slowing-down device shell cadmium layer coating method. According to the scheme, a cadmium layer is punch-formed in a subarea mode and then fixed on a slowing-down device by welding, so that cadmium steam generated when the cadmium layer covers the slowing-down device can be effectively reduced, meanwhile, uniform thickness of the cadmium layer is guaranteed, and the defects of cadmium powder oxidation, drop, incomplete coating and the like and the situation that a neutron output window which does not need to be coated is easy to contaminate during coating are avoided.
Description
Technical field
The present invention relates to a kind of slowing-down device housing technique for packing, especially a kind of slowing-down device housing cadmium layer method for coating.
Background technology
The uncoupling hydrogen slowing-down device that narrows is the critical component in spallation neutron target, and its agent structure is made up of hydrogen tank, Dewar vessel, helium vessel, water container etc..Supercritical low temperature hydrogen moderator is positioned in hydrogen slowing-down device hydrogen tank, after spallation neutron experience and proton (proton) repeatedly elastic collision and energy exchange (moderation of neutrons process), become mental retardation cold neutrons, it is transported at neutron spectrograph by neutron ejector, for Neutron physics experiment.Need on the outer wall (except neutron output window) of Dewar vessel and fairlead thereof to be coated with one layer of 0.6 ± 0.1mm thickness cadmium (Cd) layer, as uncoupling (neutron-absorbing) material.In order to ensure assimilation effect, cadmium layer required thickness is uniform, integrity good, difficult drop-off.The feature of cadmium is that toxicity is high, easily produces pollution in manufacture process.The coating of cadmium layer generally uses the technique of plasma spraying, can produce cadmium steam, environment and people can be caused bigger harm in spraying process.The process costs of plasma spraying is higher, coating easily occur in uneven thickness, cadmium powder body is oxidizable, easy to fall off, spray the defects such as imperfect, easily pollutes the neutron output window that need not spraying in spraying process, this is the weak point existing for prior art.
Summary of the invention
The purpose of the present invention, it is aiming at the deficiency existing for prior art, and the technical scheme of a kind of slowing-down device housing cadmium layer method for coating is provided, the program uses after the subregion punch forming of cadmium layer, it is fixed by welding on slowing-down device, can effectively reduce the cadmium steam produced when cadmium layer covers slowing-down device, ensure that the thickness of cadmium layer is uniform simultaneously, avoid the occurrence of cadmium powder body to aoxidize, come off, spray the situation easily polluting the neutron output window that need not spraying in the defects such as imperfect, and spraying process.
This programme is achieved by the following technical measures:
A kind of slowing-down device housing cadmium layer method for coating, includes following steps:
A, the housing interlayer of slowing-down device is divided into 4 parts, respectively cervical region cadmium layer (1), shoulder cadmium layer (2), main body cadmium layer (3), bottom cadmium layer (4)；
B, the cadmium layer of 4 parts each use punching press or bending technique one-body molded；
C, the various piece cadmium layer of molding is spliced on slowing-down device housing after, use welding procedure to connect each side layer, it is achieved the overall parcel to slowing-down device.
Preferred as this programme: in step b, the cadmium layer after molding needs to carry out Thickness sensitivity, can carry out being welded to connect molding after reaching thickness evenness requirement.
Preferred as this programme: the thickness calibration of cadmium layer is 0.5-0.7mm.
Preferred as this programme: in step c, uses Arc Welding Process welding cadmium layer.
Preferred as this programme: in step c, after welding sequence completes, need butt welded seam to clear up, it is ensured that the globality of cadmium layer and concordance.
The beneficial effect of this programme can be learnt according to the narration of such scheme, owing to using the subregion punch forming of cadmium layer in this scenario, device requirement is low, the processing of cadmium layer uses simple punching press deep-drawing technique or bending technique, mold tooling design is simple, and simple to operate, process repeatability is good, punching press or bending and forming cadmium layer will not produce cadmium steam, effectively prevent cadmium layer to environment and the harm of people.Using welding procedure to connect each cadmium layer segment, the cadmium steam of generation is compared plasma spraying and to be lacked a lot, is an overall cadmium layer good integrity by being welded to connect, do not haves phenomenons such as coming off, and each positions are conformed to each other of cadmium layer is good.Can be according to functional requirement, complete covering needs to be coated with the position of cadmium layer, and the position that need not be coated with cadmium layer will not be produced pollution.
As can be seen here, the present invention compared with prior art, has substantive distinguishing features and progress, and its beneficial effect implemented also is apparent from.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Fig. 2 is the structural representation of the cadmium layer various piece of Fig. 1.
In figure, 1 is cervical region cadmium layer, and 2 is shoulder cadmium layer, and 3 is main body cadmium layer, and 4 is bottom cadmium layer, and 5 is slowing-down device output window.
Detailed description of the invention
All features disclosed in this specification, or disclosed all methods or during step, in addition to mutually exclusive feature and/or step, all can combine by any way.
Any feature disclosed in this specification (including any accessory claim, summary and accompanying drawing), unless specifically stated otherwise, all can be by other equivalences or there is the alternative features of similar purpose replaced.I.e., unless specifically stated otherwise, an example during each feature is a series of equivalence or similar characteristics.
As it can be seen, this programme includes following steps:
A, the housing interlayer of slowing-down device is divided into 4 parts, respectively cervical region cadmium layer (1), shoulder cadmium layer (2), main body cadmium layer (3), bottom cadmium layer (4)；
B, the cadmium layer of 4 parts each use punching press or bending technique one-body molded；
C, the various piece cadmium layer of molding is spliced on slowing-down device housing after, use welding procedure to connect each side layer, it is achieved the overall parcel to slowing-down device.In step b, the cadmium layer after molding needs to carry out Thickness sensitivity, can carry out being welded to connect molding after reaching thickness evenness requirement.The thickness calibration of cadmium layer is 0.5-0.7mm.In step c, use Arc Welding Process welding cadmium layer.In step c, after welding sequence completes, butt welded seam is needed to clear up, it is ensured that the globality of cadmium layer and concordance.The principle that various piece cadmium layer splits be each piece can simply punching press drawing and forming or bending and forming, and thickness after forming is uniform.
Use this programme that slowing-down device carries out cadmium layer covering, it is possible to effectively to reduce the generation amount of cadmium steam, reduce the harm to human body.Meanwhile, it is capable to the concordance of cadmium layer thickness is effectively ensured, it is to avoid slowing-down device output window is polluted by cadmium layer.
The invention is not limited in aforesaid detailed description of the invention.The present invention expands to any new feature disclosed in this manual or any new combination, and the arbitrary new method that discloses or the step of process or any new combination.
Claims (5)
1. a slowing-down device housing cadmium layer method for coating, is characterized in that: include following steps:
A, the housing interlayer of slowing-down device is divided into 4 parts, respectively cervical region cadmium layer (1), shoulder cadmium layer (2), main body cadmium layer (3), bottom cadmium layer (4)；
B, the cadmium layer of 4 parts each use punching press or bending technique one-body molded；
C, the various piece cadmium layer of molding is spliced on slowing-down device housing after, use welding procedure to connect each side layer, it is achieved the overall parcel to slowing-down device.
A kind of slowing-down device housing cadmium layer method for coating the most according to claim 1, is characterized in that: in described step b, the cadmium layer after molding needs to carry out Thickness sensitivity, can carry out being welded to connect molding after reaching thickness evenness requirement.
A kind of slowing-down device housing cadmium layer method for coating the most according to claim 2, is characterized in that: the thickness calibration of described cadmium layer is 0.5-0.7mm.
A kind of slowing-down device housing cadmium layer method for coating the most according to claim 1, is characterized in that: in described step c, uses Arc Welding Process welding cadmium layer.
A kind of slowing-down device housing cadmium layer method for coating the most according to claim 1, is characterized in that: in described step c, after welding sequence completes, needs butt welded seam to clear up, it is ensured that the globality of cadmium layer and concordance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610500798.5A CN105976887A (en) | 2016-06-30 | 2016-06-30 | Slowing-down device shell cadmium layer coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610500798.5A CN105976887A (en) | 2016-06-30 | 2016-06-30 | Slowing-down device shell cadmium layer coating method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105976887A true CN105976887A (en) | 2016-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610500798.5A Pending CN105976887A (en) | 2016-06-30 | 2016-06-30 | Slowing-down device shell cadmium layer coating method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000082597A (en) * | 1998-09-07 | 2000-03-21 | Japan Atom Energy Res Inst | Moderator vessel for neutron scattering facility |
| CN1371103A (en) * | 2002-03-19 | 2002-09-25 | 西安交通大学 | High-flux neutron slowing down package |
| JP2004354354A (en) * | 2003-05-30 | 2004-12-16 | Mitsubishi Heavy Ind Ltd | Moderator piping for spallation neutron source, moderator vessel and neutron generating facility |
| CN101546611A (en) * | 2009-04-24 | 2009-09-30 | 西安交通大学 | Neutron moderation bag for single-phase moderator circulation |
-
2016
- 2016-06-30 CN CN201610500798.5A patent/CN105976887A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000082597A (en) * | 1998-09-07 | 2000-03-21 | Japan Atom Energy Res Inst | Moderator vessel for neutron scattering facility |
| CN1371103A (en) * | 2002-03-19 | 2002-09-25 | 西安交通大学 | High-flux neutron slowing down package |
| JP2004354354A (en) * | 2003-05-30 | 2004-12-16 | Mitsubishi Heavy Ind Ltd | Moderator piping for spallation neutron source, moderator vessel and neutron generating facility |
| CN101546611A (en) * | 2009-04-24 | 2009-09-30 | 西安交通大学 | Neutron moderation bag for single-phase moderator circulation |
Non-Patent Citations (4)
| Title |
|---|
| MASAHIDE HARADA ET.AL: "Neutronics of a poisoned para-hydrogen moderator for a pulsed spallation neutron source", 《NUCLEAR INSTRUMENTS AND METHODS IN PHYSICS RESEARCH A》 * |
| WENTING DU ET.AL: "DESIGN OF MODERATORS AND REFLECTORS FOR CHINESE SPALLATION NEUTRON SOURCE", 《PROCEEDINGS OF THE 2013 21ST INTERNATIONAL CONFERENCE ON NUCLEAR ENGINEERING》 * |
| 王芳卫: "中国散裂中子源", 《科学》 * |
| 童剑飞等: "CSNS退耦合液氢慢化器中子物理-热工耦合模拟", 《工程热物理学报》 * |
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Application publication date: 20160928 |
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| RJ01 | Rejection of invention patent application after publication |