CN112489845A - Laser decontamination and recovery device for plate type heat exchange fins of PTR (thermal transport resistor) system of nuclear power station - Google Patents
Laser decontamination and recovery device for plate type heat exchange fins of PTR (thermal transport resistor) system of nuclear power station Download PDFInfo
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- CN112489845A CN112489845A CN202010978162.8A CN202010978162A CN112489845A CN 112489845 A CN112489845 A CN 112489845A CN 202010978162 A CN202010978162 A CN 202010978162A CN 112489845 A CN112489845 A CN 112489845A
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- 238000005202 decontamination Methods 0.000 title claims abstract description 100
- 230000003588 decontaminative effect Effects 0.000 title claims abstract description 97
- 238000011084 recovery Methods 0.000 title claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 239000000428 dust Substances 0.000 claims abstract description 29
- 230000007306 turnover Effects 0.000 claims abstract description 19
- 238000004140 cleaning Methods 0.000 claims abstract description 18
- 238000011109 contamination Methods 0.000 claims abstract description 9
- 238000001179 sorption measurement Methods 0.000 claims abstract description 9
- 238000005096 rolling process Methods 0.000 claims description 18
- 230000009471 action Effects 0.000 claims description 12
- 230000033001 locomotion Effects 0.000 claims description 8
- 210000001503 joint Anatomy 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 4
- 238000001914 filtration Methods 0.000 claims description 4
- 238000012876 topography Methods 0.000 claims description 4
- 239000000941 radioactive substance Substances 0.000 abstract description 15
- 239000000463 material Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 10
- 230000008569 process Effects 0.000 abstract description 10
- 238000012864 cross contamination Methods 0.000 abstract description 6
- 238000001514 detection method Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 description 6
- 230000008021 deposition Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000002285 radioactive effect Effects 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 3
- 231100000719 pollutant Toxicity 0.000 description 3
- 230000007480 spreading Effects 0.000 description 3
- 238000003892 spreading Methods 0.000 description 3
- 239000011824 nuclear material Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 239000013307 optical fiber Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 238000005488 sandblasting Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
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- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21F—PROTECTION AGAINST X-RADIATION, GAMMA RADIATION, CORPUSCULAR RADIATION OR PARTICLE BOMBARDMENT; TREATING RADIOACTIVELY CONTAMINATED MATERIAL; DECONTAMINATION ARRANGEMENTS THEREFOR
- G21F9/00—Treating radioactively contaminated material; Decontamination arrangements therefor
- G21F9/001—Decontamination of contaminated objects, apparatus, clothes, food; Preventing contamination thereof
- G21F9/005—Decontamination of the surface of objects by ablation
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- Apparatus For Disinfection Or Sterilisation (AREA)
- Laser Beam Processing (AREA)
Abstract
The invention discloses a laser decontamination and recovery device for plate type heat exchange fins of a PTR (packet transport radio) system of a nuclear power station, which comprises a conveyor belt, an adsorption device, a decontamination operation room and a turnover device, wherein the conveyor belt is arranged on the conveyor belt; the adsorption device is used for carrying out loading and unloading work on the conveying belt; a decontamination operation table and an actuating mechanism which is arranged near the decontamination operation table and can move freely are arranged in the decontamination operation room, and the actuating mechanism comprises a dust hood, a laser cleaning gun, an alpha/beta surface contamination detector and a dust collector which are arranged in the dust hood; the overturning device is used for transmitting the heat exchange fins received from the conveyor belt to the conveyor belt after overturning the upper surface and the lower surface of the heat exchange fins in the direction; according to the laser decontamination and recovery device, the radioactive substance detection can be carried out on the material to be treated under the condition that the material to be treated is not moved every time the laser decontamination operation is carried out, until the radioactive substance on the material to be treated is confirmed to be removed completely, so that the cross contamination to workers is avoided; through the arrangement of the turnover device, the whole decontamination treatment process does not need manual participation.
Description
Technical Field
The invention relates to the technical field of nuclear material purification, in particular to a laser decontamination and recovery device for a plate type heat exchange fin of a PTR (particle transport reactor) system of a nuclear power station.
Background
China is one of the countries with the largest scale of nuclear facility construction in the world, and at the present stage, the countries greatly promote strategic adjustment of energy structure, and nuclear energy is intensively developed as clean energy. However, with the rapid development of nuclear energy, the problem of the accumulation of surface radionuclides in nuclear facilities is to be solved. Currently, the decontamination process for nuclear facilities has the following problems: 1. the secondary waste generated by the traditional decontamination modes such as sand blasting, chemical, manual grinding, high-pressure water washing and the like is more, the pollutant deposition phenomenon can be generated on nuclear facilities, and the decontamination effect is not ideal; 2. in the operation process, workers need to contact with the material to be treated for many times, so the irradiation risk of the related workers is higher; 3. the treated nuclear facilities need to be transported to a detection workshop outside a decontamination workshop for secondary detection, and if the nuclear facilities do not reach the standard, secondary decontamination cleaning is carried out, so that the workload of workers is increased, and radioactive nuclides on the nuclear facilities are easy to remain on conveying equipment which is considered to be clean, and cross contamination is caused to the workers.
In summary, the specific radionuclide deposition phenomenon and complex radionuclide deposition type on the surface of nuclear facilities have put more special requirements on the related removal processes and apparatuses, and the traditional radionuclide removal processes and apparatuses have been difficult to meet the increasing radionuclide removal requirements.
Disclosure of Invention
The invention aims to provide a laser decontamination and recovery device for a plate type heat exchange fin of a PTR system of a nuclear power station, which can prevent radioactive substances on the surface of nuclear materials from spreading and diffusing to the greatest extent, greatly reduce the cross contamination risk of field workers and improve the working efficiency.
In order to achieve the purpose, the invention discloses a laser decontamination and recovery device for a plate type heat exchange fin of a nuclear power station PTR system, which is used for decontaminating the plate type heat exchange fin in the nuclear power station PTR system and comprises a conveying belt, an adsorption device, a decontamination operation chamber and a turnover device;
one end of the conveying belt is in butt joint with the decontamination operation room, the other end of the conveying belt is in butt joint with the turnover device, the conveying belt comprises a dirty surface section and a clean surface section, the dirty surface section is only used for being in contact with the dirty surface of the heat exchange piece, and the clean surface section is only used for being in contact with the clean surface of the heat exchange piece;
the adsorption device is used for carrying out loading and unloading work on the conveyor belt and comprises an action driving mechanism and a double-sided sucker arranged on the action driving mechanism, and the action driving mechanism can drive the double-sided sucker to turn and move;
the decontamination operation room is used for providing a closed place for decontaminating the heat exchange plate, a decontamination operation table and an execution mechanism which is arranged near the decontamination operation table and can move freely are arranged in the decontamination operation room, and the execution mechanism comprises a dust hood, a laser cleaning gun, an alpha/beta surface contamination detector and a dust collector which are arranged in the dust hood;
and the overturning device is used for transmitting the heat exchange sheets received from the conveyor belt to the conveyor belt after the upper and lower surfaces of the heat exchange sheets are overturned.
Compared with the prior art, the laser decontamination and recovery device has the advantages that firstly, as the laser decontamination basically adopts a dry decontamination process, and the laser cleaning gun is arranged, the amount of generated secondary waste is extremely small in the treatment process of the heat exchange plate, the pollutant deposition phenomenon cannot be generated, and the decontamination effect is better; secondly, an alpha/beta surface contamination detector is arranged in a dust hood in the decontamination operation room, so that when laser decontamination operation is performed once, whether radioactive substances exist on the surface of the material to be treated can be detected without moving the material to be treated until the radioactive substances on the material to be treated are confirmed to be removed completely, and therefore the clean material conveyed out of the decontamination operation room is absolutely clean, and cross contamination of workers is avoided; moreover, through the arrangement of the turnover device, after one surface of the heat exchange plate is completely treated, the heat exchange plate can be automatically turned over through the turnover device and then is transmitted to a decontamination operation room, and the other surface of the heat exchange plate is subjected to decontamination treatment, so that the whole decontamination treatment process does not need manual participation, and the automation degree is higher; in addition, the laser cleaning gun and the dust collector are integrated, so that generated radioactive nuclear waste can be collected in time, and the radioactive nuclear waste is prevented from being spread to other equipment in a decontamination operation room.
Preferably, the turnover device comprises a bracket, a rolling ring and a trough; the conveying device comprises a support, a trough, two rolling rings, a conveying roller and a conveying belt, wherein the support is provided with a front end and a rear end, the front end and the rear end of the trough are respectively provided with the front end and the rear end of the support, the two rolling rings can do circular motion on the support in a vertical plane, the front end and the rear end of the trough are respectively connected with the two rolling rings, an upper group of first conveying rollers and a lower group of first conveying rollers which are oppositely arranged are arranged in the trough, and one end, close to.
Preferably, a clamping mechanism is arranged on one side of the top surface or the bottom surface of the material groove, and the clamping mechanism is used for enabling the heat exchange plate to abut against one group of the first conveying rollers.
Preferably, a pair of driving wheels which are opposite to each other left and right are respectively arranged at the front end and the rear end of the bracket, the rolling ring is clamped between the pair of driving wheels, and the rolling ring can rotate along the two driving wheels; the support is further provided with a power device in transmission connection with the driving wheel, and the power device is used for driving the driving wheel to rotate.
Preferably, the decontamination operation platform is provided with a roller frame, and a plurality of second conveying rollers and a plurality of third conveying rollers which are arranged on the roller frame, the plurality of second conveying rollers are fixedly arranged on the roller frame, each third conveying roller is arranged at intervals with each second conveying roller, and the plurality of third conveying rollers are arranged on the roller frame through a lifting mechanism, through the lifting mechanism, a plurality of third conveying rollers can be stabilized on the plane above or below a plurality of second conveying rollers, so that a plurality of the second conveying rollers and a plurality of the third conveying rollers can respectively and independently support and convey the heat exchange plates, and one of the second conveying rollers and the third conveying rollers is only used for supporting and conveying the dirty surface of the heat exchange plate, and the other one of the second conveying rollers and the third conveying rollers is only used for supporting and conveying the clean surface of the heat exchange plate.
Preferably, the lifting mechanism includes a lifting rail disposed on the roller frame, a connecting plate slidably connected to the lifting rail, and a driving device, the connecting plate is connected to each of the third conveying rollers, and the driving device is configured to drive the connecting plate to slide along the lifting rail.
Preferably, a dust filtering purifier is further arranged in the decontamination operation room.
Preferably, the dust filtering purifier comprises an air inlet, an air outlet, and a dust collecting net, primary filter cotton, intermediate filter cotton and four layers of activated carbon filters which are arranged between the air inlet and the air outlet.
Preferably, a central control console is arranged outside the decontamination operation room, a monitor is arranged in the decontamination operation room, and the central control console is in communication connection with the monitor and the execution mechanism.
Preferably, a surface topography detector in communication connection with the central control console is further arranged above the conveyor belt, and the surface topography detector is used for detecting the profile of the upper surface of the current heat exchange fin on the conveyor belt so as to provide a working path for the laser cleaning gun.
Drawings
FIG. 1 is a schematic diagram of a planar system of a laser decontamination and recovery device according to an embodiment of the present invention.
Fig. 2 is a schematic plan view of a conveyor belt according to an embodiment of the present invention.
Fig. 3 is a schematic perspective view of an adsorption apparatus according to an embodiment of the present invention.
Fig. 4 is a schematic perspective view of an overturning device according to an embodiment of the present invention.
Fig. 5 is a schematic plan view of the roller support conveyor mechanism mounted on the decontamination station in accordance with an embodiment of the present invention, wherein the third conveyor roller is in a lowered position.
Fig. 6 is another schematic plan view of the roller support conveyor mechanism mounted on the decontamination station in accordance with an embodiment of the present invention, with the third conveyor roller in a raised position.
Fig. 7 is a schematic view of the internal structure of the dust filter purifier according to the embodiment of the present invention.
Detailed Description
In order to explain technical contents, structural features, and objects and effects of the present invention in detail, the following detailed description is given with reference to the accompanying drawings in conjunction with the embodiments.
As shown in fig. 1 to 3, the invention discloses a laser decontamination and recovery device for plate type heat exchange fins of a PTR system of a nuclear power plant, which is used for decontaminating the plate type heat exchange fins in the PTR system of the nuclear power plant and comprises a conveyor belt 1, an adsorption device, a decontamination operation room 3 and a turnover device 4. One end of the conveyor belt 1 is in butt joint with the decontamination operation room 3, the other end of the conveyor belt 1 is in butt joint with the turnover device 4, the heat exchange sheets to be treated are sent into the decontamination operation room 3, the heat exchange sheets needing to be turned over and output from the decontamination operation room 3 are sent into the turnover device 4, the conveyor belt 1 comprises a dirty section 11 and a clean section 10, the dirty section 11 is only used for being in contact with the dirty surfaces of the heat exchange sheets, and the clean section 10 is only used for being in contact with the clean surfaces of the heat exchange sheets, so that radioactive substances can be prevented from being transferred to the surfaces of the heat exchange sheets which are treated cleanly through the conveyor belt 1. The adsorption device is used for executing feeding and discharging work on the conveyor belt 1 and comprises an action driving mechanism 20 and a double-faced sucker 21 arranged on the action driving mechanism 20, the action driving mechanism 20 can drive the double-faced sucker 21 to turn and move, the action driving mechanism 20 in the embodiment is preferably a mechanical arm with six degrees of freedom, the double-faced sucker 21 is connected with the mechanical arm through a rotating shaft, and the mechanical arm can drive the rotating shaft to rotate. In this embodiment, one surface of the double-sided suction cup 21 is only used for adsorbing the dirty surface of the heat exchange plate, and the other surface of the double-sided suction cup 21 is only used for adsorbing the clean surface of the heat exchange plate. The decontamination operation room 3 is used for providing a closed place for decontaminating the heat exchange sheet, a decontamination operation table 30 and an actuating mechanism which is arranged near the decontamination operation table 30 and can move freely are arranged in the decontamination operation room 3, and the actuating mechanism comprises a dust hood 31, a laser cleaning gun 32 arranged in the dust hood 31, an alpha/beta surface contamination detector 33 and a dust collector 34. To facilitate free movement of the actuator, the actuator may be mounted at the end of another six degree of freedom robotic arm 37. The turnover device 4 is used for conveying the heat exchange plates received from the conveyor belt 1 to the conveyor belt 1 after turning the upper and lower surfaces of the heat exchange plates.
The working process of the laser decontamination and recovery device with the structure is as follows: firstly, the action driving mechanism 20 works, the double-sided sucker 21 is moved to the position where the heat exchange sheet to be processed is located, then the dirty surface of the double-sided sucker 21 is enabled to be opposite to the heat exchange sheet through the overturning action, so that the heat exchange sheet is adsorbed to the dirty surface section 11 of the conveyor belt 1, then the heat exchange sheet is conveyed to the decontamination operation room 3 through the conveyor belt 1, at the moment, the dirty surface section 11 of the conveyor belt 1 is completely changed into a lower belt surface located below, the clean surface section 10 of the conveyor belt 1 is located above and is changed into an upper belt surface, and as the lower surface of the current heat exchange sheet is still the dirty surface when the current heat exchange sheet is output from the decontamination operation room 3 for the first time, the conveyor belt 1 is inverted, so that the dirty surface section 11 of the conveyor belt 1 is located above again and is changed into an upper belt surface; in the decontamination operation room 3, the actuating mechanism moves to the position of the heat exchange plate, so that the dust hood 31 covers all or the part of the heat exchange plate to be processed currently, the dust collector 34 is started, the alpha/beta surface contamination detector 33 is started to detect whether radioactive substances exist on the surface of the heat exchange plate at the same time, if the radioactive substances exist on the current heat exchange plate, the laser cleaning gun 32 is started to clean the current upper surface of the heat exchange plate, after the heat exchange plate is cleaned once, the alpha/beta surface contamination detector 33 is started again to detect whether the radioactive substances exist on the current upper surface of the heat exchange plate, and if the radioactive substances still exist, the heat exchange plate is cleaned again by the laser cleaning gun 32 until the detection value of the current upper surface of the heat exchange plate reaches the standard, which indicates that the heat exchange plate is cleaned; when the area of the heat exchange plate is larger, the heat exchange plate can be treated in a subarea mode until the whole surface of the heat exchange plate is treated; then, the heat exchange plates are conveyed to a conveying belt 1, conveyed to a turnover device 4 through the conveying belt 1, turned over by the turnover device 4 and conveyed to the conveying belt 1 again, at the moment, the lower surfaces of the heat exchange plates are clean surfaces and are in contact with a clean surface section 10 of the conveying belt 1, the upper surfaces of the heat exchange plates are dirty surfaces, then the heat exchange plates are conveyed to a decontamination operation room 3 through the conveying belt 1 to perform decontamination operation, at the moment, the lower surfaces of the heat exchange plates are completely processed, therefore, after the heat exchange plates are conveyed into the decontamination operation room 3, the conveying belt 1 still needs to be turned over, the clean surface section 10 is recovered to the upper belt surface above, and the completely processed heat exchange plates coming out of the decontamination operation room 3 are ready to be received; when the plate is again placed on the conveyor belt 1 from the decontamination booth 3, the conveyor belt 1 transfers it into the active range of the motion driving mechanism 20, and then the motion driving mechanism 20 performs a blanking operation of the cleaned plate by moving and turning the double-sided suction cups 21.
Through the working process of the laser decontamination and recovery device, firstly, because the laser decontamination basically adopts a dry decontamination process, and through the arrangement of the laser cleaning gun 32, the amount of generated secondary waste is extremely small in the treatment process of the heat exchange plate, the pollutant deposition phenomenon cannot be generated, and the decontamination effect is better; secondly, an alpha/beta surface contamination detector 33 is arranged in a dust hood 31 in the decontamination operation room 3, so that when laser decontamination operation is performed once, whether radioactive substances exist on the surface of the material to be treated can be detected without moving the material to be treated until the radioactive substances on the material to be treated are confirmed to be removed completely, and therefore the clean material conveyed out of the decontamination operation room 3 is absolutely clean, and cross contamination of workers is avoided; moreover, through the arrangement of the turnover device 4, after one surface of the heat exchange plate is completely treated, the heat exchange plate can be automatically turned over through the turnover device 4 and then is transmitted to the decontamination operation room 3, and the other surface of the heat exchange plate is subjected to decontamination treatment, so that the whole decontamination treatment process does not need manual participation, and the automation degree is higher; in addition, the integration of the laser cleaning gun 32 and the vacuum cleaner 34 allows the radioactive nuclear waste generated to be collected in a timely manner and prevented from spreading to other equipment within the decontamination operator compartment 3.
As for the turnover device 4, as shown in fig. 4, it includes a bracket 40, a rolling ring 41 and a trough 42; the number of the rolling rings 41 is two, the two rolling rings 41 are respectively arranged at the front end and the rear end of the support 40 and can make circular motion on the support 40 in a vertical plane, the front end and the rear end of the trough 42 are respectively connected with the two rolling rings 41, an upper group of first conveying rollers 43 and a lower group of first conveying rollers 43 which are oppositely arranged are arranged in the trough 42, and an opening part 44 which is in butt joint with the conveying belt 1 is arranged at one end, close to the conveying belt 1, of the trough 42. In this embodiment, since the opening 44 of the trough 42 is abutted to the conveyor belt 1, the conveyor belt 1 can directly convey the heat exchanger plate to the trough 42 and clamp the heat exchanger plate between the upper and lower sets of first conveyor rollers 43, the upper and lower sets of first conveyor rollers 43 not only clamp the heat exchanger plate but also convey the heat exchanger plate, in addition, one of the upper and lower sets of first conveyor rollers 43 only contacts with the dirty surface of the heat exchanger plate, and the other of the upper and lower sets of first conveyor rollers 43 only contacts with the clean surface of the heat exchanger plate, so as to avoid the cross secondary pollution of radioactive substances on the surface of the heat exchanger plate. After the fin gets into silo 42, two rolling rings 41 rotate a week to drive silo 42 to rotate a week, and then make the upper and lower surface of the fin that is arranged in silo 42 take place to exchange. Preferably, in order to avoid the heat exchanger plate from shaking when the trough 42 is turned over, one side of the top surface or the bottom surface of the trough 42 is provided with a clamping mechanism 45, the clamping mechanism 45 is used for abutting the heat exchanger plate against one of the first conveying rollers 43, the clamping mechanism 45 in the embodiment is a plurality of air cylinders arranged at intervals on the trough 42, and when the trough 42 is to be turned over, the air cylinders stretch out and abut against the heat exchanger plate, so that the heat exchanger plate is abutted against one of the first conveying rollers 43. Further, a pair of driving wheels 46 are provided at the front and rear ends of the bracket 40, respectively, and the roller 41 is engaged between the pair of driving wheels 46, so that the roller 41 can rotate along the driving wheels 46. Preferably, the bracket 40 is further provided with a power device 47 in transmission connection with the driving wheel 46, the power device 47 is used for driving the driving wheel 46 to rotate, and the rotation of the driving wheel 46 controls the movement of the two rolling rings 41.
In a further improvement, as shown in fig. 5 and 6, the decontamination operating platform 30 is provided with a roller support transmission mechanism, the roller supporting and conveying mechanism comprises a roller frame 301, a plurality of second conveying rollers 302 and a plurality of third conveying rollers 303, wherein the plurality of second conveying rollers 302 and the plurality of third conveying rollers 303 are arranged on the roller frame 301, the plurality of second conveying rollers 302 are fixedly arranged on the roller frame 301, each third conveying roller 303 and each second conveying roller 302 are arranged at intervals, in addition, the plurality of third conveying rollers 303 are arranged on the roller frame 301 through a lifting mechanism, through the lifting mechanism, the plurality of third conveying rollers 303 can be stabilized on the plane above or below the plurality of second conveying rollers 302, so that the second plurality of transport rollers 302 and the third plurality of transport rollers 303 can each independently support and transport the plate, and one of the second plurality of conveying rollers 302 and the third plurality of conveying rollers 303 is only used for supporting the dirty surface of the heat exchanger plate, and the other of the second plurality of conveying rollers 302 and the third plurality of conveying rollers 303 is only used for supporting the clean surface of the heat exchanger plate. In this embodiment, two sets of rollers are mounted on the roller frame 301, one set (the second conveying roller 302) is fixedly mounted, the other set (the third conveying roller 303) is movably mounted in a liftable manner, when the lower surface of the heat exchange plate sent to the decontamination operation platform 30 is a dirty surface, the third conveying roller 303 descends below the supporting surface of the second conveying roller 302, the second conveying roller 302 is used for supporting and conveying the heat exchange plate, when the lower surface of the heat exchange plate sent to the decontamination operation platform 30 is a clean surface, the third conveying roller 303 ascends above the supporting surface of the second conveying roller 302, and the third conveying roller 303 is used for supporting and conveying the heat exchange plate, so that cross contamination of radioactive substances is avoided. Preferably, the lifting mechanism comprises a lifting track 304 arranged on the roller frame 301, a connecting plate 305 slidably connected with the lifting track 304, and a driving device 306, wherein the connecting plate 305 is respectively connected with each third conveying roller 303, and the driving device 306 is used for driving the connecting plate 305 to slide along the lifting track 304. The driving device 306 in this embodiment may be a gear mechanism driven by a motor, a pneumatic cylinder mechanism, or a hydraulic cylinder mechanism, and the specific structural form of the driving device 306 is not limited herein.
Further, referring to fig. 1 and 7 again, in order to prevent the dust with radioactive substances from escaping from the dust hood 31 and spreading to other equipment, a dust filter 35 may be disposed in the decontamination operation room 3 to perform deep filtration and cleaning work on the air environment in the decontamination operation room 3. Preferably, the dust filter 35 includes an air inlet 350, an air outlet 351, a dust collecting net 352, a primary filter 353, a secondary filter 354 and a four-layer activated carbon filter 355 between the air inlet 350 and the air outlet 351.
Furthermore, a central control console 5 can be arranged outside the decontamination operation room 3, a monitor 36 is arranged in the decontamination operation room 3, and the central control console 5 is in communication connection with the monitor 36 and the actuator. The movements of the actuators, such as moving the actuators, turning the vacuum cleaner 34 on/off, the laser cleaning gun 32, and the α/β surface contamination detector 33, are clearly controlled by the console 5 and the monitor 36, thereby preventing the operator from entering the decontamination operator compartment 3. Preferably, the laser cleaning gun 32 is connected with the pulse laser generator 6 arranged outside the decontamination operation room 3 through an optical fiber, and the laser generator 6 is in communication connection with the central control console 5, so that the working parameters of the laser cleaning gun 32 can be controlled through the central control console 5. Because the area of the heat exchange plate is relatively large, furthermore, a surface appearance detector 7 which is in communication connection with the central console is further arranged above the conveyor belt 1, and the surface appearance detector 7 is used for detecting the contour of the upper surface of the current heat exchange plate on the conveyor belt 1 so as to provide a working path for the laser cleaning gun 32.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. A laser decontamination and recovery device for a plate type heat exchange fin of a nuclear power station PTR system is used for decontaminating the plate type heat exchange fin in the nuclear power station PTR system and is characterized by comprising a conveyor belt, an adsorption device, a decontamination operation room and a turnover device;
one end of the conveying belt is in butt joint with the decontamination operation room, the other end of the conveying belt is in butt joint with the turnover device, the conveying belt comprises a dirty surface section and a clean surface section, the dirty surface section is only used for being in contact with the dirty surface of the heat exchange piece, and the clean surface section is only used for being in contact with the clean surface of the heat exchange piece;
the adsorption device is used for carrying out loading and unloading work on the conveyor belt and comprises an action driving mechanism and a double-sided sucker arranged on the action driving mechanism, and the action driving mechanism can drive the double-sided sucker to turn and move;
the decontamination operation room is used for providing a closed place for decontaminating the heat exchange plate, a decontamination operation table and an execution mechanism which is arranged near the decontamination operation table and can move freely are arranged in the decontamination operation room, and the execution mechanism comprises a dust hood, a laser cleaning gun, an alpha/beta surface contamination detector and a dust collector which are arranged in the dust hood;
and the overturning device is used for transmitting the heat exchange sheets received from the conveyor belt to the conveyor belt after the upper and lower surfaces of the heat exchange sheets are overturned.
2. The laser decontamination and recovery device for plate heat exchanger fins of a PTR system of a nuclear power plant as set forth in claim 1, wherein said turnover device comprises a support, a rolling ring and a trough; the conveying device comprises a support, a trough, two rolling rings, a conveying roller and a conveying belt, wherein the support is provided with a front end and a rear end, the front end and the rear end of the trough are respectively provided with the front end and the rear end of the support, the two rolling rings can do circular motion on the support in a vertical plane, the front end and the rear end of the trough are respectively connected with the two rolling rings, an upper group of first conveying rollers and a lower group of first conveying rollers which are oppositely arranged are arranged in the trough, and one end, close to.
3. The laser decontamination and recovery device for the plate-type heat exchanger of the PTR system of the nuclear power plant as claimed in claim 2, wherein a clamping mechanism is arranged on one side of the top surface or the bottom surface of the trough, and the clamping mechanism is used for abutting the heat exchanger against one group of the first conveying rollers.
4. The laser decontamination and recovery device for the plate-type heat exchanger fin of the PTR system of the nuclear power plant as claimed in claim 2, wherein a pair of driving wheels which are opposite to each other left and right are respectively arranged at the front end and the rear end of the bracket, the rolling ring is clamped between the pair of driving wheels, and the rolling ring can rotate along the two driving wheels; the support is further provided with a power device in transmission connection with the driving wheel, and the power device is used for driving the driving wheel to rotate.
5. The laser decontamination and recovery device for plate heat exchanger fins of PTR system of nuclear power plant as claimed in claim 1, wherein the decontamination operation platform is provided with a roller frame and a plurality of second conveying rollers and a plurality of third conveying rollers arranged on the roller frame, the plurality of second conveying rollers are fixedly arranged on the roller frame, each third conveying roller is alternatively arranged with each second conveying roller, and the plurality of third conveying rollers are arranged on the roller frame by a lifting mechanism, the plurality of third conveying rollers can be stabilized on the plane above or below the plurality of second conveying rollers by the lifting mechanism, so that the plurality of second conveying rollers and the plurality of third conveying rollers can respectively and independently support and convey the heat exchanger fins, and one of the plurality of second conveying rollers and the plurality of third conveying rollers is only used for supporting and conveying the contaminated surface of the heat exchanger fins, the other of the second conveying rollers and the third conveying rollers is only used for supporting and conveying the clean surface of the heat exchange plate.
6. The laser decontamination and recovery device for the plate heat exchanger of the PTR system of the nuclear power plant as claimed in claim 5, wherein the lifting mechanism comprises a lifting rail arranged on the roller frame, a connecting plate slidably connected with the lifting rail and a driving device, the connecting plate is respectively connected with each third conveying roller, and the driving device is used for driving the connecting plate to slide along the lifting rail.
7. The laser decontamination and recovery device for plate heat exchanger fins of PTR systems of nuclear power plants according to claim 1, wherein a dust filtration purifier is further arranged in the decontamination operation room.
8. The laser decontamination and recovery device for the plate heat exchanger fin of the PTR system of the nuclear power plant as claimed in claim 7, wherein the dust filter purifier comprises an air inlet, an air outlet, and a dust collecting net, a primary filter cotton, a secondary filter cotton and a four-layer activated carbon filter which are arranged between the air inlet and the air outlet.
9. The laser decontamination and recovery device for the plate heat exchanger fin of the PTR system of the nuclear power plant as claimed in claim 1, wherein a central control console is arranged outside the decontamination operating room, a monitor is arranged inside the decontamination operating room, and the central control console is in communication connection with the monitor and the actuator.
10. The laser decontamination and recovery device for plate heat exchangers of PTR systems of nuclear power plants as claimed in claim 9, wherein a surface topography detector communicatively connected to said console is further disposed above said conveyor belt, said surface topography detector being adapted to detect a profile of an upper surface of a current heat exchanger plate on said conveyor belt to provide a working path for said laser cleaning gun.
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| CN202010978162.8A CN112489845B (en) | 2020-09-16 | 2020-09-16 | Laser decontamination and recovery device for plate type heat exchange plates of PTR (Positive temperature coefficient) system of nuclear power station |
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| CN202010978162.8A CN112489845B (en) | 2020-09-16 | 2020-09-16 | Laser decontamination and recovery device for plate type heat exchange plates of PTR (Positive temperature coefficient) system of nuclear power station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113324433A (en) * | 2021-06-28 | 2021-08-31 | 中广核研究院有限公司 | Laser decontamination device and method |
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| CN112489845B (en) | 2024-03-26 |
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