CN112817030B - Measuring device - Google Patents
Measuring device Download PDFInfo
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- CN112817030B CN112817030B CN202011593476.2A CN202011593476A CN112817030B CN 112817030 B CN112817030 B CN 112817030B CN 202011593476 A CN202011593476 A CN 202011593476A CN 112817030 B CN112817030 B CN 112817030B
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- filter membrane
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- hole
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- 239000012528 membrane Substances 0.000 claims abstract description 112
- 239000000941 radioactive substance Substances 0.000 claims abstract description 16
- 239000012857 radioactive material Substances 0.000 claims abstract description 9
- 238000007789 sealing Methods 0.000 claims abstract description 4
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000003699 hair surface Effects 0.000 claims description 2
- 238000005259 measurement Methods 0.000 claims 1
- 238000001514 detection method Methods 0.000 abstract description 23
- 238000005070 sampling Methods 0.000 abstract description 7
- 230000002285 radioactive effect Effects 0.000 abstract description 3
- 238000011897 real-time detection Methods 0.000 abstract description 3
- 238000011109 contamination Methods 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 26
- 238000001914 filtration Methods 0.000 description 14
- 239000000523 sample Substances 0.000 description 7
- 239000000463 material Substances 0.000 description 4
- 238000013461 design Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920000728 polyester Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 230000036632 reaction speed Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01T—MEASUREMENT OF NUCLEAR OR X-RADIATION
- G01T1/00—Measuring X-radiation, gamma radiation, corpuscular radiation, or cosmic radiation
- G01T1/16—Measuring radiation intensity
- G01T1/167—Measuring radioactive content of objects, e.g. contamination
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- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Physics & Mathematics (AREA)
- High Energy & Nuclear Physics (AREA)
- Molecular Biology (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention discloses a measuring device for detecting radioactive substances in a gas, comprising: a housing (10) having a hollow chamber (11) formed in an inner wall thereof, a first opening (12) for gas to enter the chamber (11) provided in an upper surface thereof, and a second opening (13) for gas to exit the chamber (11) provided in a lower surface thereof; the bracket (20) is arranged in the cavity (11) and is provided with a gap with the inner wall of the cavity (11) for allowing gas to pass through; a detector (30) disposed within the holder (20); a filter membrane assembly (40) sealing the second opening (13) such that gas flows out of the second opening (13) and radioactive material in the gas is trapped on the filter membrane assembly (40); a detector (30) for detecting radioactive material on the filter assembly (40); and a fixing member (50) disposed below the housing (10) for fixing the filter membrane assembly (40) at the second opening (13). The measuring device integrates the sampling function and the detection function, and the filter membrane is convenient to exchange, so that radioactive contamination is reduced, the detection accuracy is improved, and online sampling and real-time detection can be realized.
Description
Technical Field
The invention relates to the technical field of detection, in particular to a measuring device for detecting radioactive substances in gas.
Background
The radioactive material generated by nuclear activity is released into the atmosphere and spreads out as smoke with the wind, thereby forming a radioactive plume. Radioactive materials are produced during conventional nuclear activities, such as nuclear power plant operation, radioisotope production, and nuclear waste disposal. In order to effectively control the environmental impact of nuclear pollution, the radioactive substance-containing gases discharged into the environment need to be monitored in real time and cleaned. At present, the detection method mainly adopts an air sampler to sample, namely, the air containing radioactive substances is pumped by a pump and filtered by a filter membrane, so that dust with radioactivity is deposited on the filter membrane, and the filter membrane is sent to a laboratory for analysis and detection after the sampling is finished. Moreover, the air sampler in the prior art is basically cylindrical, a circular filter membrane is fixed in a screwing mode, and the sampler is easy to adhere and dirty when the filter membrane is assembled and disassembled, so that the detection precision and the authenticity of a detection result are seriously affected.
Disclosure of Invention
The invention mainly aims to provide a measuring device with accurate detection and high working efficiency, which can rapidly complete on-line sampling and real-time detection of radioactive substances in the atmosphere.
To achieve the above object, the present invention provides a measuring apparatus for detecting a radioactive substance in a gas, comprising:
the inner wall of the shell forms a hollow cavity, the upper surface of the shell is provided with a first opening for gas to enter the cavity, and the lower surface of the shell is provided with a second opening for gas to flow out of the cavity;
a support arranged in the chamber; a gap is reserved between the bracket and the inner wall of the cavity for allowing gas to pass through;
the detector is arranged in the bracket;
the filter membrane assembly seals the second opening, so that gas flows out of the second opening, radioactive substances in the gas are trapped on the filter membrane assembly, and the detector detects the radioactive substances on the filter membrane assembly;
The fixing piece is arranged below the shell and used for fixing the filter membrane assembly at the second opening.
Further, the holder includes a holder body having a sealed inner space for accommodating the probe, and a connection member; the connector is used for arranging the bracket in the cavity of the shell in a suspending way.
Further, the connecting piece is provided with a first end part and a second end part, wherein the first end part is fixedly connected with the bracket main body, and the second end part is detachably and fixedly connected with the shell.
Further, the filter membrane component comprises a first filter membrane support piece and a filter membrane in a card form, and a first through hole is formed in the surface of the first filter membrane support piece; the filter membrane is stacked on the surface of the first filter membrane support and seals the through hole, and a portion of the filter membrane not covered by the first filter membrane support constitutes a filter area.
Further, the filter membrane assembly further comprises a second filter membrane support in the form of a card, the second filter membrane support is identical in shape to the first filter membrane support, a second through hole identical in shape and position to the first through hole of the first filter membrane support is formed in the second filter membrane support, the filter membrane is arranged between the first filter membrane support and the second filter membrane support, the first through hole and the second through hole are sealed, and a part of the filter membrane which is not covered by the first filter membrane support and the second filter membrane support forms a filter area.
Further, the second opening and the first through hole of the shell are both circular, and the diameters of the first through hole and the second opening are the same.
Or the second opening of the shell, the first through hole and the second through hole are all round, and the diameters of the first through hole, the second through hole and the second opening are the same.
Further, the filter membrane is bonded to a surface of the first filter membrane support opposite to the lower surface of the housing.
Or the filter membrane is adhered to the surface of the first filter membrane support and/or the second filter membrane support.
Further, the mount is pivotally connected to the housing such that when the mount is pivoted to the closed position, the second opening on the lower surface of the housing is closed and the filter assembly is clamped between the upper surface of the mount and the lower surface of the housing.
Further, the upper surface of the fixing piece is provided with a concave part, and the concave part is provided with a vent hole penetrating through the upper surface and the lower surface of the fixing piece.
Further, the edge of the recess has the same surface shape and size as the second opening of the housing, the recess being arranged such that when the securing member is pivoted to the closed position, the edge of the recess is aligned with the edge of the second opening of the housing in a direction perpendicular to the upper surface of the securing member.
Further, the inner surface of the concave part is a smooth cambered surface, and the vent hole is positioned at the central position of the concave part.
Further, the inner surface of the concave part is a sphere.
Further, the securing member has a first locking portion that cooperates with a second locking portion provided on the housing to releasably lock the securing member in the closed position when the securing member is pivoted to the closed position.
Further, the first locking part is a buckle, and the second locking part is a clamping groove; or the first locking part is a clamping groove, the second locking part is a buckle, and the first locking part and the second locking part form a buckle type detachable locking structure.
Alternatively, the first locking part is a hook surface and the second locking part is a hair surface; or the first locking part is a magic tape surface, the second locking part is a magic tape hook surface, and the first locking part and the second locking part form a sticking type detachable locking structure.
Alternatively, the first locking portion and the second locking portion are permanent magnets, and the first locking portion and the second locking portion form a magnetic detachable locking structure.
Further, the probe is sealed within the holder.
Further, a plurality of detectors are provided, the plurality of detectors are stacked up and down in the inner space of the bracket main body, and gaps are reserved between the detectors.
By applying the technical scheme of the invention, the measuring device has compact structure, light weight and convenient carrying. The filter membrane component adopts a card type structure, is convenient and quick to exchange, and avoids the pollution of the measuring device by radioactive substances when the filter membrane is exchanged as much as possible, thereby obviously improving the detection accuracy, having high detection efficiency and meeting the requirements of quick research and judgment and emergency response on nuclear accidents.
Drawings
Other objects and advantages of the present invention will become apparent from the following description of the invention with reference to the accompanying drawings, which provide a thorough understanding of the present invention.
FIG. 1 is a schematic side cross-sectional view of the overall structure of a measuring device according to the present invention;
FIG. 2 is a schematic top view of one embodiment of a bracket mounting structure according to the present invention;
FIG. 3 is a schematic side cross-sectional view of one embodiment of a filter membrane assembly according to the present invention;
FIG. 4 is a schematic side cross-sectional view of another embodiment of a filter membrane assembly according to the present invention;
FIG. 5 is an A-direction view of FIG. 3 or FIG. 4;
FIG. 6 is a schematic side sectional view of a fastener according to the present invention in a closed state;
fig. 7 is a schematic side sectional structure of the fixing member according to the present invention in an opened state.
It should be noted that the drawings are not necessarily to scale, but are merely shown in a schematic manner that does not affect the reader's understanding.
Reference numerals illustrate:
10. a housing; 11. a chamber; 12. a first opening; 13. a second opening
20. A bracket; 21. a holder main body; 22. a connecting piece; 221. a first end;
222. A second end;
30. a detector;
40. a filter membrane assembly; 41. a first filter membrane support; 42. a filter membrane; 43. a second filter membrane support; 411. a first through hole; 432. second through hole
50. A fixing member; 51. a recessed portion; 52. a vent hole; 53. a first locking portion;
54. Second locking part
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. It will be apparent that the described embodiments are one embodiment, but not all embodiments, of the present invention. All other embodiments, which can be made by a person skilled in the art without creative efforts, based on the described embodiments of the present invention fall within the protection scope of the present invention.
It is to be noted that, in the present application, unless explicitly specified and defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which the present application belongs. If, throughout, reference is made to "first," "second," etc., the description of "first," "second," etc., is used merely for distinguishing between similar objects and not for understanding as indicating or implying a relative importance, order, or implicitly indicating the number of technical features indicated, it being understood that the data of "first," "second," etc., may be interchanged where appropriate. If "and/or" is present throughout, it is meant to include three side-by-side schemes, for example, "A and/or B" including the A scheme, or the B scheme, or the scheme where A and B are satisfied simultaneously. Spatially relative terms, such as "above," "below," "top," "bottom," and the like, may be used herein for ease of description merely to describe one device or feature's spatial location relationship to another device or feature as illustrated in the figures, and should be understood to encompass different orientations in use or operation in addition to the orientation depicted in the figures. Furthermore, the terms "mounted," "connected," "secured," and the like as used herein are intended to be broadly interpreted, as well as being fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art according to the specific circumstances.
The application will be described in further detail below with reference to the drawings by means of specific embodiments.
Fig. 1 is a schematic side sectional view of the whole structure of the measuring device of the present invention, and it can be seen that the measuring device for detecting radioactive substances in the atmosphere of the present invention comprises at least the following components: a housing 10, wherein a hollow chamber 11 is formed on the inner wall of the housing 10, a first opening 12 for gas to enter the chamber 11 is formed on the upper surface of the housing 10, and a second opening 13 for gas to flow out of the chamber 11 is formed on the lower surface of the housing 10; a holder 20, the holder 20 being arranged within the chamber 11; a gap is reserved between the bracket 20 and the inner wall of the chamber 11 for the passage of gas; a detector 30, the detector 30 being disposed within the holder 20; a filter membrane assembly 40, the filter membrane assembly 40 sealing the second opening 13 such that gas flows out of the second opening 13 and radioactive materials in the gas are trapped on the filter membrane assembly 40, and the detector 30 detects the radioactive materials on the filter membrane assembly 40; and a fixing member 50, the fixing member 50 being disposed under the housing 10 for fixing the filter membrane assembly 40 at the second opening 13.
Wherein the hollow chamber 11 formed by the inner wall of the housing 10 and the bracket 20 are shaped and dimensioned to ensure that a sufficient gap is left between the inner wall of the chamber 11 and the bracket 20 for the detected gas to pass smoothly. Preferably, both the chamber 11 and the support 20 are cylindrical. Of course, other shapes may be used to fit the particular shape of the probe 30 and minimize the volume of the measuring device. The upper surface of the housing 10 is provided with a first opening 12, from which first opening 12 the gas to be detected enters the chamber 11, and the first opening 12 also serves as a mounting and dismounting channel for the holder 20, whereby the first opening 12 is preferably dimensioned to be larger than the maximum external dimension of the holder 20.
As shown in fig. 2, the holder 20 of the present invention includes a holder body 21 and a connection member 22, the holder body 21 having a sealable inner space for accommodating the probe 30; the connector 22 is used to fix the bracket 20 in suspension within the chamber 11 of the housing 10.
The connector 22 should have sufficient structural strength to ensure that the bracket 20 can be securely positioned within the cavity 11 of the housing 10, the connector 22 having a first end 221 and a second end 222. Wherein the first end 221 is fixedly connected to the stand body 21, for example: the method can adopt welding, riveting or bonding and the like, and can also adopt a threaded connection mode; the second end 222 is then detachably and fixedly connected to the housing 10, for example: threaded connection, snap connection, etc. Whatever the connection method, it is necessary to secure the stability of the connection to ensure that the probe 30 disposed in the holder main body 21 can perform the detection operation in a stable state. The connector 21 preferably has a cross-sectional dimension as small as possible to minimize resistance to the flow of the gas to be tested into the chamber 11 while ensuring structural strength.
As shown in fig. 3, 4 and 5, the filter assembly 40 of the present invention adopts a card type design in order to enhance the convenience of filter replacement. In one embodiment, the filter assembly includes a first filter support 41 in the form of a card and a filter 42. As can be seen from fig. 3, the surface of the first filter support 41 is provided with a first through hole 411; the filter membrane 42 is stacked on the surface of the first filter membrane support 41 and seals the through hole 411, and a portion of the filter membrane 42 not covered by the first filter membrane support 41 constitutes a filter area.
In order to further enhance the structural stability of the filter assembly 40, as shown in fig. 4, a second filter support 43 in the form of a card may be further added to the filter 42, the second filter support 43 preferably has the same shape as the first filter support 41, and a second through hole 431 is formed, and the second through hole 432 has the same shape and position as the first through hole 411 of the first filter support 41, and the filter 42 is disposed between the first filter support 41 and the second filter support 43, so that the filter 42 seals the first through hole 411 and the second through hole 431 at the same time, and the portion of the filter 42 not covered by the first filter support 41 and the second filter support 43 forms a filter area.
In performing the filtration, the filter assembly 40 is disposed at the second opening 13 on the lower surface of the housing 10 and completely seals the second opening 13, so that the gas flowing out of the chamber 11 through the second outlet 13 will be filtered through the filtering area of the filter assembly 40, and the powdery radioactive substances in the gas will be trapped by the filter 42 and deposited on the filtering area of the filter 42, and the detector 30 above the filtering area can detect the radioactive substances.
Preferably, the second opening 13 and the first through hole 411 of the housing 10 are both circular, and the first through hole 411 and the second opening 13 have the same diameter. Or the second opening 13 of the housing 10 and the first and second through holes 411 and 431 are circular, and the diameters of the first through hole 411, the second through hole 431 and the second opening 13 are the same. In the detection, the circular filtering area of the filter membrane assembly 40 is arranged in a center-aligned manner with the second opening 13, whereby the second opening 13 and the first and second through holes 411, 431 form an air flow channel, while the filtering area of the filter membrane 42, i.e. the detection area, is virtually the same size as the second opening 13 of the housing 10. Of course, the second opening 13 and the first and second through holes 411 and 431 may be designed in other shapes.
In the above-described first embodiment of the filter assembly 40, the filter 42 may be firmly adhered to the surface of the first filter support 41 opposite to the lower surface of the housing 10 by an adhesive. In another embodiment, the filter membrane assembly 40 further has a second filter membrane support 43, where the first filter membrane support 41 and the second filter membrane support 43 are overlapped and hold the filter membrane therebetween, and the filter membrane 42 may be bonded to only one surface of the first filter membrane support 41, only one surface of the second filter membrane support 43, or both surfaces of the first filter membrane support 41 and the second filter membrane support 43. Whatever the bonding means used, it is necessary to ensure that the bonding strength is sufficient to enable the filter membrane 42 to withstand the impact of the filtered air flow, and to maintain the flat stretched configuration of the membrane during the filtration process.
The first filter support 41 and the second filter support 43 may be made of cardboard, or may be made of a conventional plastic material, such as polypropylene PP, polyester PET, etc. The material used preferably has sufficient structural strength and a certain compression elasticity so that when the fixing member 50 is in the closed state, the filter membrane assembly 40 is pressed by the fixing member 50 to the lower surface of the housing 10 at the second opening 13, and the contact portion of the filter membrane assembly 40 and the second opening 13 has sufficient air tightness so as to ensure that the detected gas does not leak from the edge of the second opening 1 to affect the filtering effect and the detection accuracy.
The fixture 50 of the measuring device of the present invention is used to secure the filter assembly 40 in the operating position. To facilitate opening and closing, the mount 50 is preferably pivotally connected to the housing 10, and such that when the mount 50 is pivoted to the closed position, the mount 50 closes the second opening 13 on the lower surface of the housing 10 and clamps and secures the filter assembly 40 between the upper surface of the mount 50 and the lower surface of the housing 10. For this purpose, the fixing element 50 preferably has a flat upper surface which is adapted to the lower surface of the first filter membrane support of the filter membrane module 40, while the height of the gap between the fixing element 50 and the housing 10 should be designed to be slightly smaller than the overall thickness of the filter membrane module 40, in order to achieve an effective sealing of the filter membrane module against the second opening.
The pivotable connection between the fixing member 50 and the housing 10 may be achieved by a hinge, a hinge shaft, or other common pivot connection in the mechanical field, and will not be described here.
In order to smoothly realize the filtration and guide the air flow to smoothly exit the measuring device, the upper surface of the fixing member 50 is further designed to have a recess 51 and a vent hole 52 penetrating the upper and lower surfaces of the recess 51 is opened. In this way, the air flow filtered by the filter assembly 40 is discharged through the vent holes 52 located in the recess 51 under the transitional guide of the recess 51. In order to reduce the resistance of the air flow and to avoid the generation of turbulence of the air flow as much as possible, the shape of the concave portion 51 is preferably a smooth concave arc surface, more preferably a spherical surface for easy manufacture, and the position of the vent hole 52 is preferably set to be located at the center of the lowest position of the concave portion 51.
The edges of the recess 51 preferably have the same surface shape and size as the second opening of the housing 10 in order to allow the air flow to pass as evenly as possible through the entire filtration area of the filter membrane assembly 40. For this purpose, the position of the recess 51 is designed such that when the fixing member 50 is pivoted to the closed position, the edge of the recess 51 is aligned with the edge of the second opening 13 of the housing 10 in a direction perpendicular to the upper surface of the fixing member 50. Thus, the second opening 13, the filtering area of the filter membrane assembly 40, and the recess 51 are all positioned in an up-down alignment, thereby forming an unobstructed filtered air flow path.
To drive the gas being measured into the measuring device, the outlet of the vent 52 may be connected to a suction pump via a gas line. When the fixing member 50 is in the closed position, the whole measuring device is in a gas-tight state except for the first opening 11 at the top of the measuring device and the vent hole 52 at the bottom of the measuring device, and at this time, the suction pump is started, so that the detected gas can be sucked into the chamber 11 through the first opening 12 and downwards through the gap between the housing 10 and the bracket main body 21 of the measuring device, and sequentially passes through the second opening 13 of the housing 10 and the filtering area of the filter membrane assembly 40, thereby trapping the radioactive substances in the gas by the filter membrane 42 and depositing on the filter membrane 42 for detection by the detector.
Upon detection, the securing member 50 needs to be locked in the closed position. As shown in fig. 6 and 7, the fixing member 50 has a first locking portion 53, and when the fixing member 50 is pivoted to the closed position, the first locking portion 53 is engaged with a second locking portion 54 provided on the housing, thereby detachably locking the fixing member 50 in the closed position.
Preferably, the first locking portion 53 is a buckle, and the second locking portion 54 is a slot; or the first locking part 53 is a clamping groove, the second locking part 54 is a buckle, and the first locking part 53 and the second locking part 54 form a buckle type detachable locking structure.
Alternatively, the first locking portion 53 is a hook-and-loop surface, and the second locking portion 54 is a hook-and-loop surface; or the first locking part 53 is a magic tape surface, the second locking part 54 is a magic tape hook surface, and the first locking part 53 and the second locking part 54 form a sticking type detachable locking structure.
Alternatively, the first locking portion 53 and the second locking portion 54 are permanent magnets, and the first locking portion 53 and the second locking portion 54 form a magnetically-attractive detachable locking structure. Of course, if the substance being detected is affected by a magnetic field, which affects the accuracy of the detection, it is not desirable to use a magnet as an integral part of the locking structure.
Other forms of locking fixtures 50 known in the art may be used, as long as they are quickly and easily locked and unlocked, and are applicable to the measuring device of the present invention.
The detectors 30 are used for detecting radioactive substances in the gas, and the number of the detectors 30 may be plural, and the plural detectors 30 are stacked one above another in the inner space of the holder main body 21, with a gap between the respective detectors 30.
The measuring device of the invention can be further provided with a data line, and an interface for outputting the data line is arranged on the shell 10 of the measuring device, so that the detection data obtained by the detector 30 can be transmitted to an analysis system for data analysis, storage and display.
The measuring device of the present invention may be coupled to a suction pump, for example, by connecting the suction pump to the vent 52 on the fixture 50 via a gas line to provide the motive force for drawing the gas to be measured into the chamber 11.
In carrying out the inspection operation of the measuring apparatus of the present invention, the filter assembly 40 is first prepared, the filter assembly 40 is placed at the second opening 13 of the lower surface of the housing 10 of the measuring apparatus, and the filtering area of the filter assembly 40 is aligned with the center of the second opening 13. Subsequently, the fixing member 50 is closed and locked, thereby fixing the filter membrane assembly 40 in the detection position. Then, the suction pump communicating with the vent 52 on the fixing member 50 is started to suck the air in the chamber 11, the detected air enters the chamber 11 from the first opening 12 at the top of the measuring device along with the sucked air flow, and passes through the second opening 13 of the housing 10 and the filtering area of the filter membrane assembly in sequence downwards through the gap between the housing 10 and the bracket main body 21 of the measuring device, thereby the radioactive substances in the air are trapped by the filter membrane 42 and deposited on the filter membrane 42, and the air filtered by the filter membrane 42 flows out of the measuring device through the recess 51 and the vent 52 of the fixing member 50. Thereupon, the detector 30 detects the radioactive material on the filter 42 in real time and outputs the detected data through a data line.
In summary, the measuring device integrates the sampling function and the detecting function, has compact structure, light weight, convenient carrying, strong flexibility and expandable work at any time and any place. In addition, due to the adoption of the filter membrane component with the card type structural design and the combination of the fixing piece with the rapid opening and closing type design, the filter membrane is very convenient and rapid to exchange, and the possibility of radioactive contamination during exchange of the filter membrane is remarkably reduced, so that the detection accuracy is increased. Therefore, the detection efficiency and the detection accuracy of the measuring device are obviously higher than those of the conventional method of analyzing and detecting by sampling on site and sending the sample to a laboratory, which are commonly adopted in the prior art, the measuring device has wide detection range and high reaction speed, and can realize on-line sampling and real-time detection, thereby providing an efficient monitoring means for nuclear emergency response when nuclear accidents occur.
The above is only a specific embodiment of the present invention, but the scope of the present invention should not be limited thereto, and the scope of the present invention should be determined by the claims.
It should also be noted that, in the embodiments of the present invention, the features of the embodiments of the present invention and the features of the embodiments of the present invention may be combined with each other to obtain new embodiments without conflict.
In the description of the present specification, the descriptions of the terms "one implementation," "some implementations," "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The foregoing is a further detailed description of the application in connection with specific embodiments, and it is not intended that the application be limited to such description. It will be apparent to those skilled in the art that several simple deductions or substitutions can be made without departing from the spirit of the application.
Claims (17)
1. A measurement device for detecting a radioactive substance in a gas, comprising:
The gas-collecting device comprises a shell (10), wherein a hollow cavity (11) is formed in the inner wall of the shell (10), a first opening (12) for gas to enter the cavity (11) is formed in the upper surface of the shell (10), and a second opening (13) for gas to flow out of the cavity (11) is formed in the lower surface of the shell (10);
-a support (20), said support (20) being arranged inside said chamber (11); a gap is reserved between the bracket (20) and the inner wall of the chamber (11) for the gas to pass through;
-a detector (30), the detector (30) being arranged within the holder (20);
-a filter assembly (40), said filter assembly (40) sealing said second opening (13) such that said gas flows out of said second opening (13) and radioactive material in said gas is trapped on said filter assembly (40), said detector (30) detecting radioactive material on said filter assembly (40);
-a fixing member (50), said fixing member (50) being arranged below said housing (10) for fixing said filter membrane assembly (40) at said second opening (13);
the mount (50) is pivotably connected to the housing (10) such that when the mount (50) is pivoted to a closed position, the second opening (13) on the lower surface of the housing (10) is closed and the filter assembly (40) is clamped between the upper surface of the mount (50) and the lower surface of the housing (10);
The upper surface of the fixing piece (50) is provided with a concave part (51), and a vent hole (52) penetrating through the upper surface and the lower surface of the concave part (51) is formed in the concave part (51);
The edge of the recess (51) has the same surface shape and size as the second opening of the housing, the recess (51) being arranged such that when the securing member (50) is pivoted to the closed position, the edge of the recess (51) is aligned with the edge of the second opening (13) of the housing (10) in a direction perpendicular to the upper surface of the securing member (50).
2. The measuring device according to claim 1, wherein,
The bracket (20) comprises a bracket main body (21) and a connecting piece (22), wherein the bracket main body (21) is provided with a sealed inner space for accommodating the detector (30); the connecting piece (22) is used for arranging the bracket (20) in the cavity (11) of the shell (10) in a suspending way.
3. The measuring device according to claim 2, wherein,
The connecting piece (22) is provided with a first end part (221) and a second end part (222), the first end part (221) is fixedly connected with the bracket main body (21), and the second end part (222) is detachably and fixedly connected with the shell (10).
4. The measuring device according to claim 1, wherein,
The filter membrane assembly (40) comprises a first filter membrane support (41) and a filter membrane (42) which are in the form of cards, wherein a first through hole (411) is formed in the surface of the first filter membrane support (41); the filter membrane (42) is stacked on the surface of the first filter membrane support (41) and seals the through hole (411), and a portion of the filter membrane (42) not covered by the first filter membrane support (41) constitutes a filter area.
5. The measuring apparatus according to claim 4, wherein,
The filter membrane assembly (40) further comprises a second filter membrane support (43) in the form of a card, the second filter membrane support (43) is identical to the first filter membrane support (41) in shape, a second through hole (431) identical to the first through hole (411) of the first filter membrane support (41) in shape and position is formed in the second filter membrane support, the filter membrane (42) is arranged between the first filter membrane support (41) and the second filter membrane support (43), the first through hole (411) and the second through hole (431) are sealed, and the part of the filter membrane (42) which is not covered by the first filter membrane support (41) and the second filter membrane support (43) forms a filter area.
6. The measuring apparatus according to claim 4, wherein,
The second opening (13) of the housing (10) and the first through hole (411) are both circular, and the diameter of the first through hole (411) is the same as that of the second opening (13).
7. The measuring apparatus according to claim 5, wherein,
The second opening (13) of the housing (10) and the first through hole (411) and the second through hole (431) are all circular, and the diameters of the first through hole (411), the second through hole (431) and the second opening (13) are the same.
8. The measuring apparatus according to claim 4, wherein,
The filter (42) is bonded to a surface of the first filter support (41) opposite to the lower surface of the housing (10).
9. The measuring apparatus according to claim 5, wherein,
The filter membrane (42) is bonded to the surface of the first filter membrane support (41) and/or the second filter membrane support (43).
10. The measuring device according to claim 1, wherein,
The inner surface of the concave part (51) is a smooth cambered surface, and the vent hole (52) is positioned at the center of the concave part.
11. The measuring device of claim 10, wherein the measuring device comprises a sensor,
The inner surface of the concave part (51) is a spherical surface.
12. The measuring device according to any of the claims 10-11, characterized in that,
The securing element (50) has a first locking portion (53), which first locking portion (53) cooperates with a second locking portion (54) provided on the housing to detachably lock the securing element (50) in the closed position when the securing element (50) is pivoted to the closed position.
13. The measuring device of claim 12, wherein the measuring device comprises a sensor,
The first locking part (53) is a buckle, and the second locking part (54) is a clamping groove; or the first locking part (53) is a clamping groove, the second locking part (54) is a buckle, and the first locking part (53) and the second locking part (54) form a buckle type detachable locking structure.
14. The measuring device of claim 12, wherein the measuring device comprises a sensor,
The first locking part (53) is a hook surface of a magic tape, and the second locking part (54) is a hair surface of the magic tape; or the first locking part (53) is a magic tape surface, the second locking part (54) is a magic tape hook surface, and the first locking part (53) and the second locking part (54) form a sticking type detachable locking structure.
15. The measuring device of claim 12, wherein the measuring device comprises a sensor,
The first locking part (53) and the second locking part (54) are permanent magnets, and the first locking part (53) and the second locking part (54) form a magnetic detachable locking structure.
16. The measuring device according to claim 1, wherein,
The detector (30) is sealed within the holder (20).
17. The measuring device according to claim 1, wherein,
The plurality of detectors (30) are arranged in a plurality, the plurality of detectors are vertically stacked in the inner space of the bracket main body, and gaps are reserved among the detectors.
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