CN203657885U - Passive nuclear material level detector - Google Patents
Passive nuclear material level detector Download PDFInfo
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- CN203657885U CN203657885U CN201420038695.8U CN201420038695U CN203657885U CN 203657885 U CN203657885 U CN 203657885U CN 201420038695 U CN201420038695 U CN 201420038695U CN 203657885 U CN203657885 U CN 203657885U
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- photomultiplier
- housing
- cable
- end cap
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Abstract
The utility model provides a passive nuclear material level detector, belongs to the field of nuclear material level detection and aims at solving the problem that an existing nuclear material level detector comprises a radiation source and harms workers and environments. The passive nuclear material level detector detects radiation ray energy released by a detected material in a space environment through a gamma radiation probe, then compares acquired radiation energy with a calibration value through a comparator, further confirms whether the level of the detected material in a space reaches to the calibration value or not, and outputs a detection result. In addition, the passive nuclear material level detector is not in contact with the detected material, does not use the radiation source, is safe and reliable and does not harm the workers and environments. The passive nuclear material level detector is suitable for level detection of a medium containing radionuclide.
Description
Technical field
The utility model belongs to core thing position detection field.
Background technology
For many years; the core thing bit detector of domestic application is all made up of detector, radiation source, secondary instrument three parts; what adopt mostly is active radiation source; radiation intensity is larger; user of service's safety and surrounding environment are had to certain harm; along with the development of national economy, the requirement of environmental protection is also stricter, and the thing followed is that thing position detection technique has been proposed to new more demand.
Utility model content
The utility model is to comprise radiation source in order to solve existing core thing bit detector, and the problem that personnel and environment are worked the mischief, now provides passive type core thing bit detector.
Passive type core thing bit detector, it comprises: the first end cap, rubber blanket, photomultiplier, photomultiplier transit tube socket, base fixed head, housing, front panel, power panel, mainboard, cloche, pilot lamp and terminal row;
Photomultiplier, photomultiplier transit tube socket, base fixed head, front panel, power panel and mainboard are all positioned at housing;
Photomultiplier is fixed on photomultiplier transit tube socket, and photomultiplier transit tube socket is fixed on base fixed head, and base fixed head, front panel, power panel and mainboard are fixedly connected with by copper post successively;
On described base fixed head, be fixed with linear pulse amplifier and threshold value discriminator;
On front panel, be fixed with comparer;
On described power panel, be fixed with power input mouth;
On described mainboard, be fixed with charactron, pilot lamp and terminal row;
Described housing is the columnar structured of both ends open, and the first end cap is by one end sealing of housing, and cloche snaps onto the other end of housing, is provided with cable connector near the housing sidewall of cloche, between this cable connector and terminal row, is connected by signal wire;
Between photomultiplier and the first end cap, be crystal intracavity, in this crystal intracavity, be filled with sodium iodide crystal, between sodium iodide crystal and the first end cap, be provided with rubber blanket;
The signal output part of photomultiplier connects the signal input part of linear pulse amplifier, the signal input part of the signal output part connect threshold discriminator of linear pulse amplifier, the threshold signal output terminal of threshold value discriminator connects the threshold signal input end of comparer, and the comparison signal output terminal of comparer connects the signal input part of pilot lamp.
Passive type core thing bit detector described in the utility model, by the radiation ray energy that in gamma radiation detector measurement space environment, substances to be measured self discharges, then by comparer, the emittance collecting and calibration value are made comparisons, and then in acquisition space, whether the thing position of measured matter reaches calibration value, and export measurement result; The utility model does not contact with measured object simultaneously, and does not use radioactive source, safe and reliable, can not work the mischief to personnel and environment.
Passive type core thing bit detector described in the utility model, is applicable to the medium containing radioactive nuclide to carry out the detection of thing position.
Accompanying drawing explanation
Fig. 1 is the physical construction schematic diagram of passive type core thing bit detector;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is the electrical structure schematic diagram of passive type core thing bit detector;
Fig. 4 is the lead shield protective sleeve degree of depth while being L1, the altitude range schematic diagram of material to be measured;
Fig. 5 is the lead shield protective sleeve degree of depth while being L2, the altitude range schematic diagram of material to be measured.
Embodiment
Embodiment one: illustrate present embodiment with reference to Fig. 1, Fig. 2 and Fig. 3, passive type core thing bit detector described in present embodiment, it comprises: the first end cap 3, rubber blanket 4, photomultiplier 6, photomultiplier transit tube socket 7, base fixed head 8, housing 9, front panel 10, power panel 12, mainboard 15, cloche 17, pilot lamp 18 and terminal row 19;
Photomultiplier 6, photomultiplier transit tube socket 7, base fixed head 8, front panel 10, power panel 12 and mainboard 15 are all positioned at housing 9;
Photomultiplier 6 is fixed on photomultiplier transit tube socket 7, and photomultiplier transit tube socket 7 is fixed on base fixed head 8, and base fixed head 8, front panel 10, power panel 12 and mainboard 15 are fixedly connected with by copper post 14 successively;
On described base fixed head 8, be fixed with linear pulse amplifier 24 and threshold value discriminator 25;
On front panel 10, be fixed with comparer 26;
On described power panel 12, be fixed with power input mouth;
On described mainboard 15, be fixed with charactron 16, pilot lamp 18 and terminal row 19;
What described housing 9 was both ends open is columnar structured, the first end cap 3 is by one end sealing of housing 9, cloche 17 snaps onto the other end of housing 9, is provided with cable connector near the housing sidewall of cloche 17, between this cable connector and terminal row 19, is connected by signal wire 20;
Between photomultiplier 6 and the first end cap 3, be crystal intracavity, in this crystal intracavity, be filled with sodium iodide crystal 5, between sodium iodide crystal 5 and the first end cap 3, be provided with rubber blanket 4;
The signal output part of photomultiplier 6 connects the signal input part of linear pulse amplifier 24, the signal input part of the signal output part connect threshold discriminator 25 of linear pulse amplifier 24, the threshold signal output terminal of threshold value discriminator 25 connects the threshold signal input end of comparer 26, and the comparison signal output terminal of comparer 26 connects the signal input part of pilot lamp 18.
Sodium iodide crystal and photomultiplier form gamma radiation detector, the gamma-rays discharging for detection of measured object self.Front panel 10, power panel 12 and mainboard 15 all adopt SMT technology, fix by connecting copper post.Cable is locked by water-proof cable tapered end, access terminal row.Observe current reading by seal glass cover.
Embodiment two: present embodiment is that the passive type core thing bit detector described in embodiment one is described further, and in present embodiment, it also comprises: lead shield protective sleeve 1;
Described lead shield protective sleeve 1 is drum-shaped structure, has rectangular parallelepiped through hole 2 in the barrel bottom center of this drum-shaped structure, and insert in lead shield protective sleeve 1 one end with the first end cap 3 of housing 9, and closely cooperate between the two.
Embodiment three: present embodiment is that the passive type core thing bit detector described in embodiment two is described further; in present embodiment; housing 9 inserts in lead shield protective sleeve 1 with one end of the first end cap 3, makes lead shield protective sleeve 1 cover the outside of photomultiplier 6.
Embodiment four: present embodiment is that the passive type core thing bit detector described in embodiment one is described further, in present embodiment, it also comprises cable 22, one end of cable 22 is connected with cable lock 21, and this cable lock 21 is for being plugged on cable connector by cable 22.
Embodiment five: present embodiment is that the passive type core thing bit detector described in embodiment one is described further, and in present embodiment, the outer wall with cloche 17 one end of described housing 9 is provided with annular fixed groove 11.
As shown in Figure 4 and Figure 5; when application, passive type core thing bit detector level is arranged on to the height and position of warning, puts lead shield protective sleeve; lead shield protective sleeve perforate direction will be aimed at the measured object bed of material, makes thing bit detector can receive the gamma-rays that tested material sends.Wherein L is the lead shield sheath perforate degree of depth, and h is tested material layer thickness, in the time of L2 > L1, and h2 < h1.
Claims (5)
1. passive type core thing bit detector, it is characterized in that, it comprises: the first end cap (3), rubber blanket (4), photomultiplier (6), photomultiplier transit tube socket (7), base fixed head (8), housing (9), front panel (10), power panel (12), mainboard (15), cloche (17), pilot lamp (18) and terminal row (19);
Photomultiplier (6), photomultiplier transit tube socket (7), base fixed head (8), front panel (10), power panel (12) and mainboard (15) are all positioned at housing (9);
It is upper that photomultiplier (6) is fixed on photomultiplier transit tube socket (7), and photomultiplier transit tube socket (7) is fixed on base fixed head (8);
Base fixed head (8), front panel (10), power panel (12) and mainboard (15) are fixedly connected with by copper post (14) successively;
On described base fixed head (8), be fixed with linear pulse amplifier (24) and threshold value discriminator (25);
On front panel (10), be fixed with comparer (26);
Described power panel is fixed with power input mouth on (12);
On described mainboard (15), be fixed with charactron (16), pilot lamp (18) and terminal row (19);
What described housing (9) was both ends open is columnar structured, the first end cap (3) is by one end sealing of housing (9), cloche (17) snaps onto the other end of housing (9), housing sidewall near cloche (17) is provided with cable connector, between this cable connector and terminal row (19), is connected by signal wire (20);
Between photomultiplier (6) and the first end cap (3), be crystal intracavity, in this crystal intracavity, be filled with sodium iodide crystal (5), between sodium iodide crystal (5) and the first end cap (3), be provided with rubber blanket (4);
The signal output part of photomultiplier (6) connects the signal input part of linear pulse amplifier (24), the signal input part of the signal output part connect threshold discriminator (25) of linear pulse amplifier (24), the threshold signal output terminal of threshold value discriminator (25) connects the threshold signal input end of comparer (26), and the comparison signal output terminal of comparer (26) connects the signal input part of pilot lamp (18).
2. passive type core thing bit detector according to claim 1, is characterized in that, it also comprises: lead shield protective sleeve (1);
Described lead shield protective sleeve (1) is drum-shaped structure, has rectangular parallelepiped through hole (2) in the barrel bottom center of this drum-shaped structure, and insert in lead shield protective sleeve (1) one end with the first end cap (3) of housing (9), and closely cooperate between the two.
3. passive type core thing bit detector according to claim 2, is characterized in that, housing (9) inserts in lead shield protective sleeve (1) with one end of the first end cap (3), makes lead shield protective sleeve (1) cover the outside of photomultiplier (6).
4. passive type core thing bit detector according to claim 1, is characterized in that, it also comprises cable (22), and one end of cable (22) is connected with cable lock (21), and this cable lock (21) is for being plugged on cable connector by cable (22).
5. passive type core thing bit detector according to claim 1, is characterized in that, the outer wall with cloche (17) one end of described housing (9) is provided with annular fixed groove (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420038695.8U CN203657885U (en) | 2014-01-22 | 2014-01-22 | Passive nuclear material level detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420038695.8U CN203657885U (en) | 2014-01-22 | 2014-01-22 | Passive nuclear material level detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203657885U true CN203657885U (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420038695.8U Expired - Fee Related CN203657885U (en) | 2014-01-22 | 2014-01-22 | Passive nuclear material level detector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203657885U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547409A (en) * | 2015-12-30 | 2016-05-04 | 黑龙江省科学院技术物理研究所 | Passive nuclear material level measurement device and method |
-
2014
- 2014-01-22 CN CN201420038695.8U patent/CN203657885U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105547409A (en) * | 2015-12-30 | 2016-05-04 | 黑龙江省科学院技术物理研究所 | Passive nuclear material level measurement device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140618 Termination date: 20190122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |