CN106706674B - Adjustable neutron tube fixing device and method - Google Patents
Adjustable neutron tube fixing device and method Download PDFInfo
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- CN106706674B CN106706674B CN201710123737.6A CN201710123737A CN106706674B CN 106706674 B CN106706674 B CN 106706674B CN 201710123737 A CN201710123737 A CN 201710123737A CN 106706674 B CN106706674 B CN 106706674B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N23/00—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00
- G01N23/005—Investigating or analysing materials by the use of wave or particle radiation, e.g. X-rays or neutrons, not covered by groups G01N3/00 – G01N17/00, G01N21/00 or G01N22/00 by using neutrons
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H25/00—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms
- F16H25/18—Gearings comprising primarily only cams, cam-followers and screw-and-nut mechanisms for conveying or interconverting oscillating or reciprocating motions
- F16H25/20—Screw mechanisms
- F16H25/22—Screw mechanisms with balls, rollers, or similar members between the co-operating parts; Elements essential to the use of such members
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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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Abstract
The invention relates to an adjustable neutron tube fixing device and method. The distance between the movable disc and the fixed disc is adjusted by rotating the small screw rod, the mutual distance between three clamping jaws installed on the fixed disc and the movable disc is changed by stirring the shifting lever, the shifting lever is loosened after the neutron tube is stretched into a space formed by the clamping jaws, and the neutron tube is fixed by the clamping jaws under the action of the torsion spring. After the neutron tube is fixed, the relative position of the neutron tube and the instrument and equipment needing to use the neutron tube is adjusted by rotating the screw rod, so that the neutron tube is positioned at the optimal use position.
Description
Technical Field
The invention relates to an adjustable neutron tube fixing device, in particular to an adjustable neutron tube fixing device suitable for an industrial application on-line neutron activation element analysis instrument.
Background
Neutron activated element analysis technology has been widely applied to on-line real-time detection in industrial production sites, but due to the neutron yield, the service life, the stability and the like of neutron tubes, an isotope Cf-252 neutron source is generally used in most neutron activated on-line element analyzers. However, isotope Cf-252 neutron sources also suffer from the disadvantage that the radiation is not interruptible and controllable.
With the continuous promotion and improvement of the neutron tube technology, the neutron yield, the service life, the stability and other technical indexes of the novel neutron tube can meet the application requirements of the industrial on-line analysis instrument. The neutron tube generates neutrons through electricity, has the advantages of being capable of being turned off and adjusting the energy and the intensity of emitted neutrons, and has gradually replaced an isotope Cf-252 neutron source in the field of industrial production online analysis.
Not only more and more neutron activation online element analysis instruments which are newly put into use begin to use a neutron tube as a radiation source for generating neutrons, but also neutron activation element analysis instruments which previously used an isotope Cf-252 neutron source begin to modify the device after the isotope Cf-252 neutron source reaches the service life due to the half-life, and use the neutron tube as the radiation source for generating neutrons.
However, due to different application conditions and different analysis objects, neutron tubes of different specifications and models need to be used for achieving the optimal measurement and analysis effect. This results in the need to map the neutron tubes to be used one by one, to make a modification or design and to process them separately, during the structural modification of the original instrument and the design of the new instrument.
And after the service life of the neutron tube is over, when a new neutron tube is replaced, due to machining errors of the neutron tubes in different batches, the space for fixing the original neutron tube can be caused, and when the new neutron tube is fixed, some size deviation can exist, so that the neutron tube can not be installed or can be installed unstably even if the neutron tube is installed. Interference caused by external environments such as vibration and the like generally exists in an industrial application site, so that the relative position of the neutron tube and the neutron activation analysis instrument is not fixed, and errors are brought to analysis precision.
Disclosure of Invention
Aiming at the defects of the existing industrial neutron activation on-line element analysis instrument in the process of replacing the neutron tube, an adjustable neutron tube fixing device and method suitable for the industrial application on-line neutron activation element analysis instrument are provided.
The technical scheme adopted by the invention is as follows:
the fixed disc 1 is fixed with a nut 9, the inner side of the nut 9 is provided with threads which are meshed with the threads of the screw rod 10, and when the screw rod 10 rotates, the nut 9 can move on the screw rod 10 under the driving of the threads.
Two small cylindrical guide rails 4 are fixed on the fixed disc 1, a small screw rod 12 is connected to the fixed disc 1, the small screw rod 12 can rotate freely, one end, far away from the fixed disc 1, of the small screw rod 12 is provided with threads, the small screw rod 12 is connected with a small screw nut 11, threads are arranged on the inner side of the small screw nut 11 and meshed with the threads of the small screw rod 12, and when the small screw rod 12 rotates, the small screw nut 11 can move on the small screw rod 12 due to the driving of the threads.
The small screw nut 11 is fixed on the movable disc 6, and the movable disc 6 can slide on the two small cylindrical guide rails 4.
Three pin shafts 14 are fixed on the fixed disc 1, clamping jaws 13 and torsion springs 15 are installed on the pin shafts 14, one ends of the clamping jaws 13 are provided with square rubber pads, and the three clamping jaws 13 can clamp the neutron tube 5 under the action of the torsion springs 15. The fixed disk is provided with a drive plate 2, a round hole is formed in the drive plate 2, the circle center of the round hole falls on the axis position of the neutron tube 5, the drive plate 2 can rotate in a small range around the circle center of the round hole, three cylindrical protrusions are formed on one side, facing the fixed disk 1, of the drive plate 2, when the drive plate 2 rotates, the cylindrical protrusions of the drive plate 2 can drive the clamping jaws 13 to rotate around the pin shaft 14, and the mutual distance between rubber pads of the three clamping jaws 13 is increased. A shift lever 3 is fixed on the drive plate 2.
Three pin shafts 14, three claws 13 and a movable drive plate 16 are arranged on the movable disc 6 in the same way. The drive plate 16 is structurally different from the drive plate 2 in that an opening is provided at a position where the driver 3 is fixed to the drive plate 2, the driver 3 passes through the opening, and the drive plate 16 is slidable on the driver 3.
Arc-shaped openings are arranged on the fixed disc 1 and the movable disc 6, the shifting rod 3 penetrates through the arc-shaped opening of the fixed disc 1, the shifting rod 3 penetrates through the arc-shaped opening of the movable disc 6, and when the shifting rod 3 slides according to the track of the arc-shaped openings on the fixed disc 1 and the movable disc 6, the driving disc 2 and the movable driving disc 16 are driven to rotate.
The fixed disc 1 and the movable disc 6 are provided with large round holes, and the positions and the diameters of the large round holes are that the neutron tubes 5 can penetrate through the large round holes.
The movable disc 6 is provided with a small round hole, the screw rod 10 penetrates through the small round hole, and the movable disc 6 can slide on the screw rod 10.
The fixed disc 1 and the movable disc 6 are provided with openings and connected with a large cylindrical guide rail 7, the large cylindrical guide rail 7 penetrates through the openings of the fixed disc 1 and the fixed disc 6, and the fixed disc 1 and the movable disc 6 can freely slide on the large cylindrical guide rail 7.
The screw rod 10 is connected with the instrument equipment needing to use the neutron tube through two bearing seats 8, and the large cylindrical guide rail 7 is fixed with the instrument equipment needing to use the neutron tube through the two bearing seats 8.
The working method of the device for fixing the neutron tube comprises the following steps:
the small screw rod 12 is rotated to drive the movable disc 6 to slide on the two small cylindrical guide rails 4, and the distance between the movable disc 6 and the fixed disc 1 is adjusted to be proper, so that the clamping jaws 13 arranged on the fixed disc 1 and the movable disc 6 can clamp the proper position of the neutron tube 5.
By shifting the shifting lever 3, the mutual distance between the three clamping jaws 13 respectively arranged on the fixed disk 1 and the movable disk 6 is changed, so that the neutron tube 5 can pass through the space formed by the six clamping jaws 13 and the large round holes arranged on the fixed disk 1 and the movable disk 6. After the neutron tube 5 is placed to a proper position suitable for being clamped by the six clamping jaws 13, the deflector rod 3 is loosened, and the six clamping jaws 13 clamp the neutron tube 5 under the action of the torsion spring 15.
The fixed disc 1 and the movable disc 6 synchronously slide on the large cylindrical guide rail 7 by rotating the screw rod 10, and the relative position of the neutron tube 5 and the instrument and equipment needing to use the neutron tube is adjusted, so that the neutron tube 5 is in the optimal use position.
The invention has the beneficial effects that: in the process of using the neutron tube to replace an isotope neutron source, the device can be suitable for the installation of the neutron tubes with various specifications and models, can be produced in batches, and does not need to survey and draw each set of neutron tubes to be replaced and process the neutron tubes independently. After the service life of the existing neutron tube is up, when the neutron tube is replaced, the operation is convenient and simple, the neutron tubes with different specifications and models can also be adapted, and the position can be adjusted, so that the neutron tube is in the best use position.
Drawings
FIG. 1 is a schematic diagram of the structure of the apparatus;
FIG. 2 is a schematic view of the device after the angle is properly changed;
FIG. 3 is a schematic view of the operation of changing the distance between the jaws by toggling the shift lever;
in the figure: 1. the device comprises a fixed disc, a driving plate 2, a driving lever 3, a small cylindrical guide rail 4, a neutron tube 5, a movable disc 6, a large cylindrical guide rail 7, a bearing seat 8, a screw nut 9, a screw rod 10, a small screw nut 11, a small screw nut 12, a clamping jaw 13, a pin shaft 14, a torsion spring 15 and a movable driving plate 16.
Detailed Description
The structure and the using method of the device are explained in detail in conjunction with the attached drawings.
As shown in fig. 1 and 2, a nut 9 is fixed on the fixed plate 1, the inner side of the nut 9 is provided with threads, the nut 9 is engaged with the threads of the screw rod 10, and when the screw rod 10 rotates, the nut 9 moves on the screw rod 10 by the threads.
Two small cylindrical guide rails 4 are fixed on the fixed disc 1, a small screw rod 12 is connected to the fixed disc 1, the small screw rod 12 can rotate freely, one end, far away from the fixed disc 1, of the small screw rod 12 is provided with threads, the small screw rod 12 is connected with a small screw nut 11, the inner side of the small screw nut 11 is provided with threads which are meshed with the threads of the small screw rod 12, and when the small screw rod 12 rotates, the small screw nut 11 can move on the small screw rod 12 due to the driving of the threads.
The small screw nut 11 is fixed on the movable disc 6, and the movable disc 6 can slide on the two small cylindrical guide rails 4.
Three pin shafts 14 are fixed on the fixed disc 1, as shown in fig. 3, the pin shafts 14 are provided with clamping jaws 13 and torsion springs 15, one ends of the clamping jaws 13 are provided with square rubber pads, and the three clamping jaws 13 can clamp the neutron tube 5 under the action of the torsion springs 15. The fixed disk is provided with a drive plate 2, a round hole is formed in the drive plate 2, the circle center of the round hole falls on the axis position of the neutron tube 5, the drive plate 2 can rotate in a small range around the circle center of the round hole, three cylindrical protrusions are formed on one side, facing the fixed disk 1, of the drive plate 2, when the drive plate 2 rotates, the cylindrical protrusions of the drive plate 2 can drive the clamping jaws 13 to rotate around the pin shaft 14, and the mutual distance between rubber pads of the three clamping jaws 13 is increased. A shift lever 3 is fixed on the dial 2.
Three pin shafts 14, three claws 13 and a movable dial 16 are mounted on the movable disk 6 in the same manner. The dial 16 is structurally different from the dial 2 in that an opening is provided at a position where the lever 3 is fixed to the dial 2, the lever 3 passes through the opening, and the dial 16 is slidable on the lever 3.
Arc-shaped openings are arranged on the fixed disc 1 and the movable disc 6, the shifting rod 3 penetrates through the arc-shaped opening of the fixed disc 1, the shifting rod 3 penetrates through the arc-shaped opening of the movable disc 6, and when the shifting rod 3 slides according to the track of the arc-shaped openings on the fixed disc 1 and the movable disc 6, the driving disc 2 and the movable driving disc 16 are driven to rotate.
The fixed disc 1 and the movable disc 6 are provided with large round holes, and the positions and the diameters of the large round holes are that the neutron tubes 5 can penetrate through the large round holes.
The movable disc 6 is provided with a small round hole, the screw rod 10 penetrates through the small round hole, and the movable disc 6 can slide on the screw rod 10.
The fixed disc 1 and the movable disc 6 are provided with openings and connected with a large cylindrical guide rail 7, the large cylindrical guide rail 7 penetrates through the openings of the fixed disc 1 and the fixed disc 6, and the fixed disc 1 and the movable disc 6 can freely slide on the large cylindrical guide rail 7.
The screw rod 10 is connected with the instrument equipment needing to use the neutron tube through two bearing seats 8, and the large cylindrical guide rail 7 is fixed with the instrument equipment needing to use the neutron tube through the two bearing seats 8.
The working mode of the device for fixing the neutron tube is as follows:
as shown in fig. 2, the small screw 12 is rotated to drive the movable disc 6 to slide on the two small cylindrical guide rails 4, and the distance between the movable disc 6 and the fixed disc 1 is adjusted to be proper, so that the claws 13 arranged on the fixed disc 1 and the movable disc 6 can clamp the proper position of the neutron tube 5.
As shown in fig. 3, by shifting the shift lever 3 and simultaneously changing the mutual distance between the three claws 13 respectively mounted on the fixed disk 1 and the movable disk 6, the neutron tube 5 can pass through the space formed by the six claws 13 and the large circular holes arranged on the fixed disk 1 and the movable disk 6. After the neutron tube 5 is placed to a proper position suitable for being clamped by the six clamping jaws 13, the driving lever 3 is released, and the six clamping jaws 13 clamp the neutron tube 5 under the action of the torsion spring 15.
By rotating the screw rod 10, the fixed disc 1 and the movable disc 6 synchronously slide on the large cylindrical guide rail 7, and the relative position of the neutron tube 5 and the instrument and equipment needing to use the neutron tube is adjusted, so that the neutron tube 5 is in the optimal use position.
Application example:
the fixed disc 1 and the movable disc 6 are made of Q235A iron plates through nickel plating;
the drive plate 2, the movable drive plate 16, the shift lever 3, the screw nut 9, the screw rod 10, the small screw nut 11 and the small screw rod 12 are made of 304 stainless steel;
the small cylindrical guide rail 4 and the large cylindrical guide rail 7 are made of 6061 aluminum alloy;
the pin shaft 14 is made of 35 # steel;
the torsion spring 15 is made of 65Mn spring steel;
the claw 13 is made of 304 stainless steel and is provided with a rubber pad at one end;
the bearing seat 8 adopts a Q235A standard component;
the whole device is entrusted to a mechanical processing factory for processing and manufacturing.
Claims (4)
1. The utility model provides a neutron pipe fixing device with adjustable which characterized in that:
a nut (9) is fixed on the fixed disc (1), and the inner side of the nut (9) is provided with threads which are meshed with the threads of the screw rod (10); two small cylindrical guide rails (4) are fixed on the fixed disc (1), a small screw rod (12) is connected to the fixed disc (1), threads are formed at one end, far away from the fixed disc (1), of the small screw rod (12), the small screw rod (12) is connected with a small screw nut (11), and threads are formed on the inner side of the small screw nut (11) and meshed with the threads of the small screw rod (12); the small screw nut (11) is fixed on the movable disc (6), and the movable disc (6) can slide on the two small cylindrical guide rails (4); three pin shafts (14) are fixed on the fixed disc (1), clamping jaws (13) and a torsion spring (15) are installed on the pin shafts (14), and the three clamping jaws (13) can clamp the neutron tube (5) under the action of the torsion spring (15); the fixed disc is provided with a drive plate (2), a round hole is formed in the drive plate (2), the drive plate (2) can rotate around the circle center of the round hole in a small range, three cylindrical protrusions are formed on one side, facing the fixed disc (1), of the drive plate (2), and when the drive plate (2) rotates, the cylindrical protrusions of the drive plate (2) can drive the clamping jaws (13) to rotate around the pin shaft (14), so that the mutual distance between rubber pads of the three clamping jaws (13) is increased; a deflector rod (3) is fixed on the drive plate (2); three pin shafts (14), three claws (13) and a movable drive plate (16) are arranged on the movable disc (6) in the same way; the structure of the movable dial plate (16) is different from that of the dial plate (2) in that an opening is arranged at the position for fixing the shift lever (3) relative to the dial plate (2), the shift lever (3) passes through the opening, and the movable dial plate (16) can slide on the shift lever (3); arc-shaped openings are arranged on the fixed disc (1) and the movable disc (6), the deflector rod (3) penetrates through the arc-shaped opening of the fixed disc (1), and the deflector rod (3) penetrates through the arc-shaped opening of the movable disc (6); the fixed disc (1) and the movable disc (6) are provided with large round holes, and the positions and the diameters of the large round holes enable the neutron tube (5) to pass through the large round holes; the movable disc (6) is provided with a small round hole, and the screw rod (10) penetrates through the small round hole; the fixed disc (1) and the movable disc (6) are provided with openings and connected with a large cylindrical guide rail (7), and the large cylindrical guide rail (7) penetrates through the openings of the fixed disc (1) and the fixed disc (6); the screw rod (10) is connected with the instrument equipment needing to use the neutron tube through two bearing seats (8), and the large cylindrical guide rail (7) is fixed with the instrument equipment needing to use the neutron tube through the two bearing seats (8).
2. The adjustable neutron tube fixing device according to claim 1, characterized in that: one end of the claw (13) is provided with a rubber pad.
3. The adjustable neutron tube fixing device according to claim 1, characterized in that: the circle centers of the round holes of the driving plate (2) and the movable driving plate (16) are positioned on the axial line position of the neutron tube (5).
4. The method for fixing the neutron tube by using the adjustable neutron tube fixing device according to claim 1, which is characterized in that:
the movable disc (6) is driven to slide on the two small cylindrical guide rails (4) by rotating the small screw rod (12), and the distance between the movable disc (6) and the fixed disc (1) is adjusted to be proper, so that the clamping jaws (13) arranged on the fixed disc (1) and the movable disc (6) can clamp the proper position of the neutron tube (5);
by shifting the shifting lever (3), the mutual distance between the three clamping jaws (13) respectively arranged on the fixed disc (1) and the movable disc (6) is changed at the same time, so that the neutron tube (5) can pass through a space formed by the six clamping jaws (13) and large round holes arranged on the fixed disc (1) and the movable disc (6); after the neutron tube (5) is placed to a proper position suitable for being clamped by the six clamping jaws (13), the driving lever (3) is loosened, and the six clamping jaws (13) clamp the neutron tube (5) under the action of the torsion spring (15);
the fixed disc (1) and the movable disc (6) synchronously slide on the large cylindrical guide rail (7) by rotating the screw rod (10), and the relative position of the neutron tube (5) and the instrument and equipment needing the neutron tube is adjusted, so that the neutron tube (5) is positioned at the optimal use position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710123737.6A CN106706674B (en) | 2017-03-03 | 2017-03-03 | Adjustable neutron tube fixing device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710123737.6A CN106706674B (en) | 2017-03-03 | 2017-03-03 | Adjustable neutron tube fixing device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106706674A CN106706674A (en) | 2017-05-24 |
| CN106706674B true CN106706674B (en) | 2023-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710123737.6A Active CN106706674B (en) | 2017-03-03 | 2017-03-03 | Adjustable neutron tube fixing device and method |
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| CN (1) | CN106706674B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012061921A1 (en) * | 2010-11-10 | 2012-05-18 | Messier-Dowty Inc. | Rotary machine tool with telescopic arms |
| TW201326582A (en) * | 2011-12-26 | 2013-07-01 | Hiwin Tech Corp | Combination of screw rod and nut with supporting base |
| CN103801957A (en) * | 2014-02-14 | 2014-05-21 | 南京霞光新能源科技有限公司 | Clamp for circular tube |
| CN104816172A (en) * | 2015-04-23 | 2015-08-05 | 济南大学 | Bar or tube indexing hole machining clamping tool |
| CN205290396U (en) * | 2016-01-21 | 2016-06-08 | 周伟 | Mobilizable numerical control machine tool of workstation |
| CN206573500U (en) * | 2017-03-03 | 2017-10-20 | 丹东东方测控技术股份有限公司 | Adjustable neutron pipe fixing device |
-
2017
- 2017-03-03 CN CN201710123737.6A patent/CN106706674B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012061921A1 (en) * | 2010-11-10 | 2012-05-18 | Messier-Dowty Inc. | Rotary machine tool with telescopic arms |
| TW201326582A (en) * | 2011-12-26 | 2013-07-01 | Hiwin Tech Corp | Combination of screw rod and nut with supporting base |
| CN103801957A (en) * | 2014-02-14 | 2014-05-21 | 南京霞光新能源科技有限公司 | Clamp for circular tube |
| CN104816172A (en) * | 2015-04-23 | 2015-08-05 | 济南大学 | Bar or tube indexing hole machining clamping tool |
| CN205290396U (en) * | 2016-01-21 | 2016-06-08 | 周伟 | Mobilizable numerical control machine tool of workstation |
| CN206573500U (en) * | 2017-03-03 | 2017-10-20 | 丹东东方测控技术股份有限公司 | Adjustable neutron pipe fixing device |
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| Publication number | Publication date |
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| CN106706674A (en) | 2017-05-24 |
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