CN117420162B - Mobile device and graphite dust accumulation amount online measurement system - Google Patents
Mobile device and graphite dust accumulation amount online measurement system Download PDFInfo
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- CN117420162B CN117420162B CN202311116454.0A CN202311116454A CN117420162B CN 117420162 B CN117420162 B CN 117420162B CN 202311116454 A CN202311116454 A CN 202311116454A CN 117420162 B CN117420162 B CN 117420162B
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- 239000000428 dust Substances 0.000 title claims abstract description 38
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 36
- 229910002804 graphite Inorganic materials 0.000 title claims abstract description 35
- 239000010439 graphite Substances 0.000 title claims abstract description 35
- 238000009825 accumulation Methods 0.000 title claims abstract description 32
- 238000005259 measurement Methods 0.000 title claims abstract description 21
- 238000001514 detection method Methods 0.000 claims description 29
- 238000012545 processing Methods 0.000 claims description 9
- 239000003381 stabilizer Substances 0.000 claims description 8
- 238000004364 calculation method Methods 0.000 claims description 7
- 238000004846 x-ray emission Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 239000000446 fuel Substances 0.000 abstract description 11
- 238000010521 absorption reaction Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- MARUHZGHZWCEQU-UHFFFAOYSA-N 5-phenyl-2h-tetrazole Chemical compound C1=CC=CC=C1C1=NNN=N1 MARUHZGHZWCEQU-UHFFFAOYSA-N 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000007770 graphite material Substances 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000002285 radioactive effect Effects 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 241001270131 Agaricus moelleri Species 0.000 description 1
- 229910004611 CdZnTe Inorganic materials 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- AQCDIIAORKRFCD-UHFFFAOYSA-N cadmium selenide Chemical compound [Cd]=[Se] AQCDIIAORKRFCD-UHFFFAOYSA-N 0.000 description 1
- QWUZMTJBRUASOW-UHFFFAOYSA-N cadmium tellanylidenezinc Chemical compound [Zn].[Cd].[Te] QWUZMTJBRUASOW-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000001307 helium Substances 0.000 description 1
- 229910052734 helium Inorganic materials 0.000 description 1
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
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- Measurement Of Radiation (AREA)
Abstract
The invention relates to the field of graphite dust accumulation amount for high-temperature gas cooled reactors, in particular to a mobile device and an online measurement system of the graphite dust accumulation amount, wherein the mobile device comprises a supporting mechanism, the supporting mechanism comprises a pulley platform assembly and a supporting rod assembly, and the supporting rod assembly is arranged above the pulley platform assembly; the fixing mechanism comprises a transmitting fixing assembly and a detecting fixing assembly, the detecting fixing assembly is arranged on the outer side of the transmitting fixing assembly in a sliding mode, and the transmitting fixing assembly is fixed on the supporting rod assembly. The supporting mechanism and the fixing mechanism are matched with each other, so that the measuring device can be integrally moved, and the measuring device does not need to be integrally disassembled when measuring a pipeline; the dust accumulation amount and accumulation form of the fuel loading and unloading system can be measured on line through the graphite dust accumulation amount on-line measuring system.
Description
Technical Field
The invention relates to the field of graphite dust accumulation for high-temperature gas cooled reactors, in particular to a mobile device and an online measurement system for the graphite dust accumulation.
Background
Graphite materials in the pebble-bed high-temperature gas cooled reactor are used as a slowing material and a structural material; the reactor core contains about 42 ten thousand graphite matrix fuel elements with the diameter of about 6cm, and further contains other graphite materials such as a graphite reflecting layer, carbon bricks, supporting members, various guide pipes and the like; the pebble-bed high-temperature reactor is operated in a non-shutdown refueling circulation mode, fuel pebbles are added into the reactor core through a reactor top loading pipe, a repeated circulation mode is adopted, and finally the fuel pebbles flow out of the reactor core through a reactor bottom unloading pipe; the fuel ball can rub and abrade with itself and other graphite components in the circulating process to generate graphite dust; the problem of graphite dust can influence the safe and stable operation of the high-temperature gas cooled reactor, and the online measurement of the accumulation amount of the graphite dust is carried out, so that the method has important significance for guaranteeing the safe and reliable operation of a unit.
The existing on-line measurement technology of the mature graphite dust accumulation amount is lacking, only the open inspection can be carried out, but the shutdown maintenance of equipment and the working environment with radioactivity bring inconvenience to the open inspection, and the measurement device is not movable, and the measurement device is required to be disassembled for reassembling when measuring different pipelines; in the prior art, gamma rays released by a pipeline, gaseous substances and solid radioactive dust are rotated and scanned outside a tube through a gamma detector (such as a CZT detector), and the deposition quality of graphite dust is further calculated according to different energy of gamma energy spectrum characteristic peaks of an air-borne source item and a solid deposition source item; however, this method cannot meet the demand for online measurement of the amount and morphology of dust deposited on a fuel handling system.
Disclosure of Invention
This section is intended to outline some aspects of embodiments of the invention and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description of the invention and in the title of the invention, which may not be used to limit the scope of the invention.
The present invention has been made in view of the above-described and/or the problem that the measuring device is not movable as a whole in the conventional graphite dust accumulation amount online measuring system and the problem that the accumulation amount and accumulation form of the dust of the fuel handling system cannot be measured online.
It is therefore an object of the present invention to provide a mobile device that allows for an integrated movement of the measuring device, so that the measuring device does not need to be disassembled in its entirety when measuring a pipe.
In order to solve the technical problems, the invention provides the following technical scheme: a mobile device comprising, a support mechanism comprising a pulley platform assembly and a strut assembly disposed above the pulley platform assembly; the fixed mechanism comprises an emission fixed component and a detection fixed component, wherein the emission fixed component is fixed on the supporting rod component, and the detection fixed component is arranged on the outer side of the emission fixed component in a sliding mode.
As a preferred embodiment of the mobile device according to the present invention, wherein: the pulley platform assembly comprises a roller, a driving piece and a connecting rod frame, wherein the roller is connected to the output end of the driving piece through a transmission structure, and the driving piece is arranged at four corners of the connecting frame.
As a preferred embodiment of the mobile device according to the present invention, wherein: the support rod assembly comprises a main support rod piece, a stabilizer rod and a branch support rod, wherein the bottom end of the main support rod piece is connected to the connecting rod frame, the other end of the main support rod piece extends above the connecting frame and is connected with the branch rod, one end of the stabilizer rod is connected to the side wall of the middle part of the main support rod piece, and the other end of the stabilizer rod is connected to the connecting frame; the main support rod piece comprises a middle rod, a vertical rod and a transverse rod, one end of the middle rod is fixed below the vertical rod and kept vertical, and one end of the vertical rod is fixed below the transverse rod and kept vertical.
As a preferred embodiment of the mobile device according to the present invention, wherein: the emission fixing assembly comprises an emission shell and a fixing shell, wherein the emission shell is arranged in the fixing shell; fixing columns are symmetrically arranged on the outer side wall of the transmitting shell, and one end, far away from the transmitting shell, of each fixing column is rounded; the sliding ring is fixed on the outer side face of the fixed shell, a first sliding groove is axially formed in the shell of the fixed shell, and the fixed column can slide in the first sliding groove in a matched mode.
As a preferred embodiment of the mobile device according to the present invention, wherein: the detection fixing assembly comprises a detection shell and a fixing piece, and the detection shell is symmetrically and slidably arranged on two sides of the fixing piece; a fixed pier is fixed on the cambered surface on the outer side of the detection shell, and a first fixed hole is formed in the fixed pier; the inner side wall of the detection shell is provided with a plurality of holes for light to pass through; the fixing piece comprises a fixing seat, a first sliding block, a first spring, a first baffle, a second sliding block, a second spring and a sliding cylinder, wherein the first spring, the second spring, the first sliding block and the second sliding block are arranged in the fixing seat in a sliding mode, two sides of the first spring are respectively contacted with the first sliding block and the fixing seat, two sides of the second spring are respectively contacted with the second sliding block and the fixing seat, the first baffle is arranged in a groove cavity at the end portion of the first sliding block in a sliding mode, the fixing seat is symmetrically fixed on two sides of the sliding cylinder, and the tail end of the second sliding block is subjected to rounding treatment.
As a preferred embodiment of the mobile device according to the present invention, wherein: the fixing seat is provided with a first sliding block cavity, a second sliding block cavity, an inserting cavity, a baffle plate cavity and a limiting cavity, wherein the first sliding block cavity, the inserting cavity, the baffle plate cavity and the limiting cavity are communicated with each other, the first sliding block is arranged in the first sliding block cavity in a sliding manner, the second sliding block is arranged in the second sliding block cavity in a sliding manner, and the first baffle plate is arranged in the inserting cavity in a sliding manner; the middle part of the sliding cylinder is communicated to form a sliding ring groove, and a second sliding groove and a third sliding groove which are communicated with each other and distributed in an L shape are also formed in the side wall of the sliding cylinder.
As a preferred embodiment of the mobile device according to the present invention, wherein: the bottom of the first baffle is fixedly provided with a limiting plate, and the limiting plate is slidably arranged in the limiting cavity.
Another object of the present invention is to provide an online measurement system for the amount of graphite dust accumulated, which can measure the amount of dust accumulated and the accumulation form of the fuel handling system on line.
In order to solve the technical problems, the invention provides the following technical scheme: an on-line measurement system for the accumulation amount of graphite dust, which comprises an X-ray emission component arranged in an emission shell; an X-ray detection assembly is disposed in the detection housing.
As a preferable scheme of the online measurement system for the graphite dust accumulation amount, the invention comprises the following steps: the X-ray emission assembly comprises an X-ray source and a front collimator, wherein the front collimator is arranged on a line along the output direction of the X-ray source.
As a preferable scheme of the online measurement system for the graphite dust accumulation amount, the invention comprises the following steps: the X-ray detection assembly comprises a rear collimator, an X-ray detector array, a data processing module and a calculation module, wherein the rear collimator and the X-ray detector array are arranged in the mounting hole, the rear collimator is positioned on a ray edge line of an X-ray source, the X-ray detector array is arranged on a receiving side of the rear collimator and receives X-rays passing through the rear collimator, and the X-ray detector array is electrically connected with the calculation module through the data processing module.
The invention has the beneficial effects that: according to the mobile device and the graphite dust accumulation amount online measurement system, the support mechanism and the fixing mechanism are matched with each other, so that the measurement device can be integrally moved, and the measurement device does not need to be integrally disassembled when measuring a pipeline; the dust accumulation amount and accumulation form of the fuel loading and unloading system can be measured on line through the graphite dust accumulation amount on-line measuring system.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:
FIG. 1 is a schematic diagram of the overall structure of a mobile device;
FIG. 2 is a schematic structural view of a support mechanism;
FIG. 3 is an exploded view of the securing mechanism;
FIG. 4 is a schematic illustration of the component structure of the securing mechanism;
FIG. 5 is an exploded view of the fixture;
FIG. 6 is a cross-sectional view of a part of the securing mechanism;
FIG. 7 is a schematic structural view of an X-ray emitting assembly;
FIG. 8 is a schematic diagram of an on-line measurement system for graphite dust accumulation;
fig. 9 is a schematic structural view of an X-ray detection assembly.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will become more readily apparent, a more particular description of the invention will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present invention is not limited to the specific embodiments disclosed below.
Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the invention. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.
Example 1
Referring to fig. 1 to 3, a first embodiment of the present invention provides a mobile device, which specifically includes a support mechanism 100 including a pulley platform assembly 101 and a strut assembly 102, wherein the strut assembly 102 is disposed above the pulley platform assembly 101; the fixing mechanism 200 comprises a transmitting fixing assembly 201 and a detecting fixing assembly 202, wherein the transmitting fixing assembly 201 is fixed on the supporting rod assembly 102, and the detecting fixing assembly 202 is arranged outside the transmitting fixing assembly 201 in a sliding mode.
Further, the pulley platform assembly 101 comprises a roller 101a, a driving piece 101b and a connecting rod frame 101c, wherein the roller 101a is connected to the output end of the driving piece 101b through a transmission structure, and the driving piece 101b is arranged at four corners of the connecting frame 101 c; the strut assembly 102 includes a main strut member 102a, a stabilizer bar 102b and a branch bar 102c, the bottom end of the main strut member 102a being connected to the link frame 101c, the other end extending above the connection frame 101c and being connected to the branch bar 102c, one end of the stabilizer bar 102b being connected to a middle side wall of the main strut member 102a, and the other end being connected to the connection frame 101 c.
It should be noted that, the rollers 101a are round wheels, and 4 rollers 101a are respectively fixed at four corners of the bottom of the supporting mechanism 100; the driving piece 101b can drive the roller 101a to rotate through electric power, so as to drive the whole mobile device to move; the link 101c is a cylindrical rod, and the link 101c is used to connect the roller 101a and support the strut assembly 102.
Preferably, the emission fixing assembly 201 includes an emission case 201a and a fixing case 201b, the emission case 201a being disposed in the fixing case 201 b; the detecting fixing assembly 202 includes a detecting housing 202a and a fixing member 202b, and the detecting housing 202a is symmetrically slidably disposed at both sides of the fixing member 202 b.
It should be noted that the emission casing 201a is cylindrical, the fixing casing 201b is also a cylindrical casing, and the inner diameter of the fixing casing 201b is the same as the outer diameter of the emission casing 201 a; the detecting shell 202a is a circular arc segment shell with a central angle smaller than 120 degrees.
In this embodiment, an operator can move the moving device through the supporting mechanism 100, and conveniently fix the moving device on the outer side of the pipe section to be detected through the fixing mechanism 200 for detection.
Example 2
Referring to fig. 1 to 9, a second embodiment of the present invention is based on the previous embodiment.
Specifically, main support bar 102a includes a center bar 102a-1, a vertical bar 102a-2, and a cross bar 102a-3, with one end of center bar 102a-1 being fixed below vertical bar 102a-2 and held vertically, and one end of vertical bar 102a-2 being fixed below cross bar 102a-3 and held vertically; the outer side wall of the transmitting shell 201a is symmetrically provided with fixed columns 201a-1, and one end of the fixed column 201a-1, which is far away from the transmitting shell 201a, is subjected to rounding treatment; the slip ring 201b-1 is fixed on the outer side surface of the fixed shell 201b, the first sliding groove 201b-2 is axially formed in the shell of the fixed shell 201b, and the fixed column 201a-1 can slide in the first sliding groove 201b-2 in a matched mode.
It should be noted that the middle bar 102a-1, the vertical bar 102a-2 and the cross bar 102a-3 are all cylindrical bars, the middle bar 102a-1 is fixed at the middle of two rollers 101a at a relatively long distance, the vertical bar 102a-2 is perpendicular to the ground, the bottom of the vertical bar 102a-2 is fixed at one end of the middle bar 102a-1 and spaced 90 degrees from the middle bar 102a-1, one end of the cross bar 102a-3 is fixed at the top of the vertical bar 102a-2, the cross bar 102a-3 is parallel to the middle bar 102a-1, and the cross bar 102a-3 is spaced 90 degrees from the vertical bar 102 a-2.
Further, a fixed pier 202a-1 is fixed on the outer arc surface of the detection shell 202a, and a first fixed hole 202a-2 is formed in the fixed pier 202 a-1; the inner side wall of the detection shell 202a is provided with a plurality of holes M for light to pass through; the fixing member 202b includes a fixing base 202b-1, a first slider 202b-2, a first spring 202b-3, a first baffle 202b-4, a second slider 202b-5, a second spring 202b-6 and a slide cylinder 202b-7, the first spring 202b-3, the second spring 202b-6, the first slider 202b-2 and the second slider 202b-5 are slidably disposed in the fixing base 202b-1, two sides of the first spring 202b-3 are respectively contacted with the first slider 202b-2 and the fixing base 202b-1, two sides of the second spring 202b-6 are respectively contacted with the second slider 202b-5 and the fixing base 202b-1, the first baffle 202b-4 is slidably disposed in a groove cavity at an end portion of the first slider 202b-2, the fixing base 202b-1 is symmetrically fixed at two sides of the slide cylinder 202b-7, and an end of the second slider 202b-5 is rounded.
It should be noted that, the fixed piers 202a-1 are rectangular, and two fixed piers 202a-1 are fixed on each detecting shell 202a, and the interval between the two fixed piers 202a-1 around the center of the detecting shell 202a exceeds 100 degrees and is smaller than 120 degrees; the first fixing hole 202a-2 is a square hole; the fixed seat 202b-1 is a square seat; the first slider 202b-2 is a rectangular block; the second slider 202b-5 is also a rectangular parallelepiped block; the first baffle 202b-4 is a rectangular parallelepiped plate; slide tube 202b-7 is a cylindrical tube.
Preferably, the fixed seat 202b-1 is provided with a first sliding block cavity 202b-1a, a second sliding block cavity 202b-1b, an inserting cavity 202b-1c, a baffle cavity 202b-1d and a limiting cavity 202b-1e, wherein the first sliding block cavity 202b-1a, the inserting cavity 202b-1c, the baffle cavity 202b-1d and the limiting cavity 202b-1e are communicated with each other, the first sliding block 202b-2 is arranged in the first sliding block cavity 202b-1a in a sliding manner, the second sliding block 202b-5 is arranged in the second sliding block cavity 202b-1b in a sliding manner, and the first baffle 202b-4 is arranged in the inserting cavity 202b-1c in a sliding manner; the middle part of the sliding tube 202b-7 is communicated to form a sliding ring groove 202b-7a, and a second sliding groove 202b-7b and a third sliding groove 202b-7c which are mutually communicated and distributed in an L shape are also formed on the side wall of the sliding tube 202 b-7; the bottom of the first baffle 202b-4 is fixed with a limiting plate 202b-4a, and the limiting plate 202b-4a is slidably disposed in the limiting cavity 202b-1 e.
It should be noted that the first slider cavity 202b-1a is a rectangular cavity, and the first slider cavity 202b-1a is slidably connected to the first slider 202 b-2; the second slider cavity 202b-1b is a rectangular cavity, and the second slider cavity 202b-1b is slidably connected with the second slider 202 b-5; the baffle cavity 202b-1d is a right triangle cavity, the right angle side of the baffle cavity 202b-1d is communicated with the first slider cavity 202b-1a, the hypotenuse of the baffle cavity 202b-1d is positioned at the bottom of the baffle cavity 202b-1d, and the baffle cavity 202b-1d is narrower than the first slider cavity 202b-1a; the limiting cavity 202b-1e is a rectangular cavity, and the limiting cavity 202b-1e is communicated with the inclined side of the baffle cavity 202b-1d; the spacing cavities 202b-1e are wider than the baffle cavities 202b-1d; the sliding ring groove 202b-7a is in a circular ring shape, and the sliding ring groove 202b-7a is in sliding connection with the sliding ring 201 b-1; the second chute 202b-7b is an arc-shaped slot, and the central angle of the second chute 202b-7b is 90 degrees; the third runner 202b-7c is a vertical slot, the third runner 202b-7c being perpendicular to the second runner 202b-7b; the limiting plate 202b-4a is a parallelogram plate, and the limiting plate 202b-4a is slidably connected with the limiting cavity 202b-1e by limiting the first baffle 202b-4.
In this embodiment, when the operator needs to detach the moving device from the tested pipeline, the operator needs to pull the second slider 202b-5 away first to slide the second slider 202b-5 out of the first fixing hole 202a-2, after the second sliders 202b-5 on both sides of the detection shell 202a are pulled out, the detection shell 202a can be directly pulled out, after which the operator needs to rotate the slide tube 202b-7 until the third slide slot 202b-7c overlaps the first slide slot 201b-2 in the vertical direction, the fixing column 201a-1 can be directly pulled out, and thus the operator can directly and vertically pull out the emission shell 201a; when both launch housing 201a and sonde housing 202a are removed, horizontal movement of support mechanism 100 causes the pipe under test to be removed from the gap defined by main support bar 102 a; while the operator may also add a radioactive source to the removed emitter housing 201 a.
It should be noted that, when the operator needs to install the moving device on the pipe to be tested, the operator needs to first horizontally move the supporting mechanism 100 to make the pipe to be tested be located at the intersection of the axes of the three branches 102c, then the operator needs to first vertically install the launching shell 201a, insert the fixing column 201a-1 into the bottoms of the first chute 201b-2 and the third chute 202b-7c, then horizontally rotate the sliding tube 202b-7, and slide the fixing column 201a-1 from the bottom of the third chute 202b-7c to the other side of the second chute 202b-7 b; during the sliding process of the fixed column 201a-1 in the second sliding groove 202b-7b, the fixed column 201a-1 presses the first sliding block 202b-2, so as to push the first baffle 202b-4 to slide from the shallowest position to the deepest position of the baffle cavity 202b-1 d; after the first barrier 202b-4 is lowered, the top of the first barrier 202b-4 does not block the insertion of the fixed pier 202a-1 into the insertion cavity 202b-1 c; after that, the operator can insert the fixing pier 202a-1 into the insertion cavity 202b-1c until the second slider 202b-5 is inserted into the first fixing hole 202a-2, thereby completing the fixing of the probe housing 202 a.
Example 3
Referring to fig. 1 to 9, a third embodiment of the present invention provides an on-line measurement system for the amount of graphite dust accumulated, which includes a moving device.
Specifically, the X-ray emitting assembly 300, which is disposed in the emission casing 201 a; an X-ray detection assembly 400 disposed in the detection housing 202 a.
Further, the X-ray emitting assembly 300 includes an X-ray source 301 and a front collimator 302, the front collimator 302 being disposed on a line along an output direction of the X-ray source 301; the X-ray detection assembly 400 includes a post-collimator 401, an X-ray detector array 402, a data processing module 403 and a calculating module 404, the post-collimator 401 and the X-ray detector array 402 are disposed in the mounting hole M, the post-collimator 401 is located on a ray edge of the X-ray source 301, the X-ray detector array 402 is disposed on a receiving side of the post-collimator 401 and receives the X-rays passing through the post-collimator 401, and the X-ray detector array 402 is electrically connected with the calculating module 404 through the data processing module 403.
It should be noted that, since the absorption and scattering of X-rays by an object are closely related to the density of the object, the atomic number of the element of the object, the X-ray energy, and the like, the absorption rule is as follows:
I＝I0e-μd
Wherein I is the intensity of X-rays after penetrating through the object, I0 is the intensity of incident rays, e is a natural constant, mu is the absorption coefficient of the object, and d is the thickness of the object. Therefore, the graphite dust, helium and the equipment pipe wall can be distinguished according to the absorption coefficients at different positions, namely different densities, and the online measurement of the accumulation amount and accumulation form of the graphite dust in specific equipment is realized.
Preferably, the X-ray detector array 402 may be an indirect detector (scintillator and photodiode array) or a direct detector (amorphous selenium, cadmium telluride (CdTe), cadmium zinc telluride (CdZnTe, CZT), and cadmium selenide (CdSe)), which may be either a line array detector or a face array detector; according to the position of the X-ray target, correspondingly adopting single-side or double-side or three-side arrangement; the data processing module 403 comprises a signal acquisition and A/D converter, amplifies and integrates the output signal from the detector, and then the output signal is mixed into a plurality of paths of digital signals, and the digital signals are sent to a computer for processing; the analog-to-digital converter consists of a frequency generator and a comparison integrator, and is used for collecting, processing and transmitting data to the calculation module 404; the calculation module 404 processes the input digital signals, calculates to obtain the X-ray absorption coefficient of each position, and then arranges the X-ray absorption coefficient into a matrix, namely a digital matrix, and converts each digit in the digital matrix into a small square block, namely a pixel, with different gray scales from black to white through a digital/analog converter, and arranges the small square block, namely the pixel, into a matrix, namely a CT image.
It should be noted that when the emission source and the detector are arranged in three points, the calculation module 404 may be used to perform three-dimensional reconstruction of the scanned area; and obtaining the stacking form of the graphite dust according to the obtained CT image in the specific equipment or pipeline of the fuel loading and unloading system, and combining the stacking density of the graphite dust, so as to calculate and obtain the stacking amount of the graphite dust.
The system for measuring the accumulation amount of the graphite dust on line can reconstruct and visually evaluate the accumulation form and the accumulation amount of the graphite dust in specific equipment or pipelines in the fuel loading and unloading system in three dimensions, can avoid the problems of blockage and the like caused by accumulation of the graphite dust, and is convenient for cleaning in advance; the moving device is convenient to detach and move through the supporting mechanism 100 and the fixing mechanism 200, can measure in a certain length range of the same equipment, can also move remotely, can measure equipment and pipelines with different structures, and has wider applicability.
It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.
It should be noted that the above embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, which is intended to be covered in the scope of the claims of the present invention.
Claims (4)
1. A mobile device, characterized by: comprising the steps of (a) a step of,
A support mechanism (100) comprising a pulley platform assembly (101) and a strut assembly (102), the strut assembly (102) being disposed above the pulley platform assembly (101);
The fixing mechanism (200) comprises a transmitting fixing assembly (201) and a detecting fixing assembly (202), wherein the transmitting fixing assembly (201) is fixed on the supporting rod assembly (102), and the detecting fixing assembly (202) is arranged outside the transmitting fixing assembly (201) in a sliding mode;
the pulley platform assembly (101) comprises a roller (101 a), a driving piece (101 b) and a connecting rod frame (101 c), wherein the roller (101 a) is connected to the output end of the driving piece (101 b) through a transmission structure, and the driving piece (101 b) is arranged at the four corners of the connecting rod frame (101 c);
The support rod assembly (102) comprises a main support rod piece (102 a), a stabilizer rod (102 b) and a branch rod (102 c), wherein the bottom end of the main support rod piece (102 a) is connected to the connecting rod frame (101 c), the other end of the main support rod piece extends above the connecting rod frame (101 c) and is connected with the branch rod (102 c), one end of the stabilizer rod (102 b) is connected to the middle side wall of the main support rod piece (102 a), and the other end of the stabilizer rod is connected to the connecting rod frame (101 c);
the main support rod piece (102 a) comprises a middle rod (102 a-1), a vertical rod (102 a-2) and a transverse rod (102 a-3), one end of the middle rod (102 a-1) is fixed below the vertical rod (102 a-2) and is kept vertical, and one end of the vertical rod (102 a-2) is fixed below the transverse rod (102 a-3) and is kept vertical;
The emission fixing assembly (201) comprises an emission shell (201 a) and a fixing shell (201 b), wherein the emission shell (201 a) is arranged in the fixing shell (201 b);
The outer side wall of the emission shell (201 a) is symmetrically provided with fixing columns (201 a-1), and one end, far away from the emission shell (201 a), of the fixing column (201 a-1) is subjected to rounding treatment;
A slip ring (201 b-1) is fixed on the outer side surface of the fixed shell (201 b), a first sliding groove (201 b-2) is axially formed in the shell of the fixed shell (201 b), and the fixed column (201 a-1) can slide in the first sliding groove (201 b-2) in a matching manner;
The detection fixing assembly (202) comprises a detection shell (202 a) and fixing pieces (202 b), the detection shells (202 a) are symmetrically arranged on two sides of the fixing pieces (202 b) in a sliding mode, circle centers of cambered surfaces of the detection shells (202 a) coincide with one point, and the detection shells (202 a) are arranged opposite to the fixing shells (201 b);
A fixed pier (202 a-1) is fixed on the outer cambered surface of the detection shell (202 a), and a first fixed hole (202 a-2) is formed in the fixed pier (202 a-1); mounting holes (M) are uniformly formed in the side wall of the inner cambered surface of the detection shell (202 a);
The fixing piece (202 b) comprises a fixing seat (202 b-1), a first sliding block (202 b-2), a first spring (202 b-3), a first baffle plate (202 b-4), a second sliding block (202 b-5), a second spring (202 b-6) and a sliding cylinder (202 b-7), wherein the first spring (202 b-3), the second spring (202 b-6), the first sliding block (202 b-2) and the second sliding block (202 b-5) are arranged in the fixing seat (202 b-1) in a sliding manner, two sides of the first spring (202 b-3) are respectively contacted with the first sliding block (202 b-2) and the fixing seat (202 b-1), two sides of the second spring (202 b-6) are respectively contacted with the second sliding block (202 b-5) and the fixing seat (202 b-1), the first baffle plate (202 b-4) is arranged in a groove cavity at the end part of the first sliding block (202 b-2), the fixing seat (202 b-1) is symmetrically fixed at two sides of the sliding cylinder (202 b-7), and the second sliding end part of the sliding cylinder (202 b-7) is rounded;
The fixed seat (202 b-1) is provided with a first sliding block cavity (202 b-1 a), a second sliding block cavity (202 b-1 b), an inserting cavity (202 b-1 c), a baffle cavity (202 b-1 d) and a limiting cavity (202 b-1 e), the first sliding block cavity (202 b-1 a), the inserting cavity (202 b-1 c), the baffle cavity (202 b-1 d) and the limiting cavity (202 b-1 e) are communicated with each other, the first sliding block (202 b-2) is arranged in the first sliding block cavity (202 b-1 a) in a sliding mode, the second sliding block (202 b-5) is arranged in the second sliding block cavity (202 b-1 b) in a sliding mode, and the first baffle (202 b-4) is arranged in the inserting cavity (202 b-1 c) in a sliding mode;
The middle part of the sliding tube (202 b-7) is communicated to form a sliding ring groove (202 b-7 a), and a second sliding groove (202 b-7 b) and a third sliding groove (202 b-7 c) which are mutually communicated and distributed in an L shape are also formed on the side wall of the sliding tube (202 b-7);
A limiting plate (202 b-4 a) is fixed at the bottom of the first baffle plate (202 b-4), and the limiting plate (202 b-4 a) is arranged in the limiting cavity (202 b-1 e) in a sliding mode.
2. An online measurement system for the accumulation amount of graphite dust, which is characterized in that: comprising the mobile device of claim 1, further comprising,
An X-ray emission assembly (300) disposed in the emission casing (201 a);
An X-ray detection assembly (400) disposed in the detection housing (202 a).
3. The graphite dust accumulation amount online measurement system according to claim 2, wherein: the X-ray emission assembly (300) comprises an X-ray source (301) and a front collimator (302), wherein the front collimator (302) is arranged on a line along the output direction of the X-ray source (301).
4. The graphite dust accumulation amount on-line measuring system according to claim 3, wherein: the X-ray detection assembly (400) comprises a rear collimator (401), an X-ray detector array (402), a data processing module (403) and a calculation module (404), wherein the rear collimator (401) and the X-ray detector array (402) are arranged in the mounting hole (M), the rear collimator (401) is positioned on a ray edge of the X-ray source (301), the X-ray detector array (402) is arranged on a receiving side of the rear collimator (401) and receives X-rays passing through the rear collimator (401), and the X-ray detector array (402) is electrically connected with the calculation module (404) through the data processing module (403).
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| CN117420162A (en) | 2024-01-19 |
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