CN111355869A - High-temperature-resistant and irradiation-resistant video equipment - Google Patents
High-temperature-resistant and irradiation-resistant video equipment Download PDFInfo
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- CN111355869A CN111355869A CN201811567818.6A CN201811567818A CN111355869A CN 111355869 A CN111355869 A CN 111355869A CN 201811567818 A CN201811567818 A CN 201811567818A CN 111355869 A CN111355869 A CN 111355869A
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- temperature
- high temperature
- radiation resistant
- strong
- strong radiation
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- 239000004065 semiconductor Substances 0.000 claims abstract description 26
- 230000005855 radiation Effects 0.000 claims abstract description 25
- 238000005057 refrigeration Methods 0.000 claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000002791 soaking Methods 0.000 claims abstract description 11
- 230000017525 heat dissipation Effects 0.000 claims abstract description 9
- 229910052751 metal Inorganic materials 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims abstract description 3
- 239000000446 fuel Substances 0.000 claims description 9
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 239000010937 tungsten Substances 0.000 claims description 6
- 229910001080 W alloy Inorganic materials 0.000 claims description 5
- 229920000642 polymer Polymers 0.000 claims description 5
- JFALSRSLKYAFGM-UHFFFAOYSA-N uranium(0) Chemical compound [U] JFALSRSLKYAFGM-UHFFFAOYSA-N 0.000 claims description 5
- 238000009413 insulation Methods 0.000 claims description 3
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims description 2
- 238000002834 transmittance Methods 0.000 claims description 2
- 238000007689 inspection Methods 0.000 abstract description 14
- 239000002245 particle Substances 0.000 description 6
- 230000002285 radioactive effect Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000003287 optical effect Effects 0.000 description 3
- 230000002238 attenuated effect Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/50—Constructional details
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B17/00—Details of cameras or camera bodies; Accessories therefor
- G03B17/55—Details of cameras or camera bodies; Accessories therefor with provision for heating or cooling, e.g. in aircraft
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
-
- 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
- G21F3/00—Shielding characterised by its physical form, e.g. granules, or shape of the material
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N7/00—Television systems
- H04N7/18—Closed-circuit television [CCTV] systems, i.e. systems in which the video signal is not broadcast
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Aviation & Aerospace Engineering (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The invention belongs to the technical field of nuclear power in-service inspection application, and particularly relates to high-temperature-resistant and radiation-resistant video equipment. During the operation and the material changing overhaul of the nuclear power station, the applied video equipment is required to obtain an image meeting the standard requirement in a high-temperature and strong-irradiation environment. A high temperature and strong radiation resistant video device comprising: visible light reflecting device, radiation shielding layer. The visible light reflecting device comprises a reflector, an adjusting support seat and a lens support, and is fixedly arranged at the bottom of the video equipment through bolts; the constant temperature device comprises a semiconductor refrigeration wafer, a soaking plate, a heat dissipation fin, a machine core barrel and a temperature control plate with a temperature sensor; the cold surface of the semiconductor refrigeration wafer is attached to one surface or four surfaces of the machine core barrel, the hot surface of the semiconductor refrigeration wafer is attached to the soaking plate, and a metal shell is arranged between the soaking plate and the radiating fin. The device can continuously run without failure in high-temperature and strong-irradiation environments, and has good stability and low power consumption performance.
Description
Technical Field
The invention belongs to the technical field of nuclear power in-service inspection application, and particularly relates to high-temperature-resistant and radiation-resistant video equipment.
Background
During the operation and the material changing and overhaul of the nuclear power station, the temperature of part of inspection environment reaches more than 60 ℃, and the irradiation dose rate is higher than 1000 Gy/h. According to the relevant inspection standard requirements of the nuclear power plant, video inspection is carried out on the equipment in the high-temperature and strong-irradiation environment, opening defects such as cracks, corrosion and the like on the inspected surface need to be observed in the video inspection, and therefore the video equipment which is required to be applied obtains images meeting the standard requirements in the high-temperature and strong-irradiation environment. The equipment also needs to ensure uninterrupted fault-free operation in a high-temperature and strong-irradiation environment, and has good stability and low power consumption performance.
Disclosure of Invention
1. The purpose is as follows:
in order to ensure that the video inspection equipment can obtain images meeting the requirements of the inspection specifications of the nuclear power plant in a high-temperature and strong-irradiation environment, uninterrupted and fault-free operation is ensured. Therefore, the high-temperature-resistant and radiation-resistant video equipment is developed by selecting corresponding radiation-resistant materials and designing corresponding structures.
2. Technical scheme
The technical scheme for realizing the purpose of the invention is as follows:
a high temperature and strong radiation resistant video device comprising: visible light reflecting device, radiation shielding layer. The visible light reflecting device comprises a reflecting mirror, an adjusting supporting seat and a lens support, wherein the reflecting mirror is arranged on the adjusting supporting seat, the visible light reflecting device is fixedly arranged at the bottom of the video equipment through bolts, the lens support is fixedly arranged on the bottom surface of the adjusting supporting seat through bolts, and the reflecting mirror is placed against the lens support; the constant temperature device comprises a semiconductor refrigeration wafer, a soaking plate, a heat dissipation fin, a machine core barrel and a temperature control plate with a temperature sensor; the temperature control plate with the temperature sensor is arranged at the top end of the machine core barrel with good heat conductivity, the cold surface of the semiconductor refrigeration wafer is attached to one surface or four surfaces of the machine core barrel, the hot surface of the semiconductor refrigeration wafer is attached to the soaking plate, and a metal shell is arranged between the soaking plate and the radiating fin; the irradiation shielding layer is fixedly arranged on the shell through bolts.
The irradiation shielding layer adopts a multi-material superposition mode and comprises lead, tungsten alloy, tungsten polymer and depleted uranium; the irradiation shielding layer is of an eccentric structure, the shielding thickness of one side close to the fuel rod is far larger than that of one side far away from the fuel rod, and the basic thickness is determined by the half-life period of the shielding material.
The gap between the shell and the core barrel is filled with a heat insulation layer material for insulating external heat from being conducted into the core barrel. The shell is connected with the upper end cover by screws.
The whole radiating fin is of a page-shaped structure, and the middle part of the radiating fin is provided with a screw hole which is fixedly connected with the shell through a bolt. An industrial camera and a lens are nested in the movement barrel.
The section of the adjusting support seat is L-shaped, and the glass or acrylic plate with strong light transmittance is fixedly installed on the right side surface of the adjusting support seat through bolts.
The semiconductor refrigeration wafer is connected with the temperature control plate with the temperature sensor through a circuit to form a closed-loop control loop. The temperature control plate with the temperature sensor compares the collected temperature in the machine core cylinder with the temperature set by the semiconductor refrigeration wafer, and then the semiconductor refrigeration wafer is controlled to work.
3. Effect
1) The video device is internally provided with a constant temperature device, and the camera can still keep constant temperature in a high-temperature environment through automatic control.
2) A radiation shielding structure is added outside the camera movement, and high-energy particles with various energy levels are attenuated through a radiation shielding layer.
By adopting the technical scheme of the invention, the common industrial-grade video equipment can obtain images meeting the requirements of the nuclear power plant inspection specifications in a high-temperature and strong-irradiation environment, and uninterrupted and fault-free operation is ensured. The use cost of equipment is greatly reduced, and good stability can reduce the maintenance of inspection personnel's equipment and avoid the inspection personnel to suffer the risk of bigger radiation dose injury. The inspection device can be suitable for in-service inspection and environment monitoring of different reactor type nuclear power plants.
Drawings
FIG. 1 is a view of a visible light reflecting device
FIG. 2 is a schematic view of a temperature control device
FIG. 3 radiation shielding structure top view
In the figure: 1. a reflective mirror; 2. adjusting the supporting seat; 3. heat dissipation fins; 4. a housing; 5. refrigerating the wafer; 6. A vapor chamber; 7. an upper end cover; 8. a temperature control plate with a temperature sensor; 9. a movement barrel; 10. industrial cameras and lenses; 11. and irradiating the shielding layer.
Detailed Description
The invention is described in detail below with reference to the following figures and specific embodiments:
on the basis of common industrial-grade video equipment, a visible light reflecting device, a constant temperature device and an irradiation shielding structure are additionally arranged. The camera is prevented from being directly irradiated on an optical sensor of the camera by the visible light reflecting device, the camera can be ensured to work at a constant temperature close to room temperature by the automatic control constant temperature device, and the high-energy particles with various energy levels are attenuated by the irradiation shielding layer.
The visible light reflection device comprises a reflector 1, an adjusting support seat 2 and a lens support 12.
The constant temperature device comprises a semiconductor refrigeration wafer 5, a soaking plate 6, a heat dissipation fin 3, a machine core barrel 9 and a temperature control plate 8 with a temperature sensor.
The radiation shielding layer 11 is formed by stacking a plurality of shielding materials, including lead, tungsten alloy, tungsten polymer, depleted uranium and the like.
As shown in fig. 1, in order to avoid the direct irradiation of the camera photosensitive element by the radioactive high-energy particles, the optical axis of the camera and the surface of the detected object need to be arranged in parallel, the visible light reflection device includes a reflector 1 and an adjustment support base 2, the reflector 1 is installed on the adjustment support base 2, the lens support 12 is connected with the bottom of the adjustment support base 2 by bolts, and the adjustment support base and the lens support 12 can be detached and replaced, so as to adjust the included angle between the reflector and the optical axis of the camera according to the actual requirement.
Constant temperature device
As shown in fig. 2, the industrial camera and lens 10 and the temperature control plate 8 with the temperature sensor are installed in the movement barrel 9 with good thermal conductivity, so as to ensure that the camera, the temperature control plate and the temperature sensor have good working environment, and the temperature control plate 8 with the temperature sensor collects the environmental temperature of the camera in real time. The semiconductor refrigeration wafer 5 and the temperature control plate 8 with the temperature sensor form an accurate closed-loop control loop, the temperature sensor collects the temperature in the machine core barrel 9 and transmits the temperature value to the temperature control plate, the temperature control plate compares the obtained temperature with the set temperature value, if the obtained temperature is higher than the set temperature, the refrigeration wafer starts to refrigerate, and if the obtained temperature is lower than the set temperature, the refrigeration wafer stops refrigerating.
The cold surface of the semiconductor refrigeration wafer 5 is attached to one surface or four surfaces of the machine core barrel 9, when the semiconductor refrigeration wafer 5 works, the cold surface is refrigerated to form a low-temperature surface, the high-temperature surface is formed due to heat accumulation, the semiconductor refrigeration wafer 5 provides working temperature lower than room temperature for the machine core barrel 9, heat generated by the hot surface of the semiconductor refrigeration wafer 5 is conducted to the heat dissipation fins 3 through the soaking plates 6 attached to the cold surface, and the heat is dissipated out of the upper end cover through the heat dissipation fins.
And a gap between the shell 4 and the movement barrel 9 is filled with a heat insulation layer material, so that external heat is mainly isolated from being conducted into the movement barrel 9. The shell 4 is connected with the upper end cover 7 by screws.
Irradiation shielding structure
As shown in fig. 3, the radiation-shielding layer 11 is formed by stacking a plurality of materials, including lead, tungsten alloy, tungsten polymer, depleted uranium, and the like.
The device is mainly used for checking the fuel assembly of the nuclear power station, and in the checking process, the radioactive energetic particles on one side close to the fuel rod are more, and the radioactive energetic particles on the other side far away from the fuel rod are less irradiated, so that the radiation shielding structure is designed to be an eccentric structure. The thickness of the shield on the side closer to the fuel rod is much greater than the thickness on the side further away from the fuel rod. The base thickness of the shielding layer is determined by the half-life of the different shielding materials. For internal inspection of radioactive structural members such as holes, cavities, etc., a camera is placed at the center of the shielding layer.
The irradiation shielding structure of the device adopts a mode of stacking various materials, uses tungsten polymer or lead to shield a complex structure, and uses materials such as tungsten, depleted uranium, tungsten alloy and the like to process parts with simple structures. Different shielding materials can effectively shield energetic particles with different energy levels.
Has the advantages that:
the semiconductor refrigeration chip adopted by the invention has the following main advantages: a) the device does not need any refrigerant, can continuously work and has no pollution source; the rotary part is not arranged, the rotary effect is not generated, no vibration and noise are generated during working, the service life is long, and the installation is easy. b) The semiconductor refrigeration wafer is a current transduction type wafer, can realize high-precision temperature control through the control of input current, is easy to realize remote control, program control and computer control, and is convenient for forming an automatic control system. c) The semiconductor refrigerating wafer has small thermal inertia and quick refrigerating and heating time, and can reach the maximum temperature difference when the semiconductor refrigerating wafer is electrified for less than one minute under the condition that the heat dissipation of the hot end is good and the cold end is idle. d) The temperature difference range of the semiconductor refrigerating wafer is large, and the temperature can be realized from +90 ℃ to-130 ℃.
The invention is arranged on other independently developed detection devices to form a set of complete detection system, and opening defects such as cracks, corrosion and the like on the detected surface are observed to obtain images meeting the standard requirements. And after the video detection finds the suspicious display, comprehensively judging the suspicious display.
Claims (10)
1. A high temperature and strong radiation resistant video device comprising: visible light reflecting device, irradiation shielding layer, its characterized in that: the visible light reflection device comprises a reflector (1), an adjusting support seat (2) and a lens support (12), wherein the reflector (1) is arranged on the adjusting support seat (2), the visible light reflection device is fixedly arranged at the bottom of the video equipment through a bolt, the lens support (12) is fixedly arranged on the bottom surface of the adjusting support seat (2) through the bolt, and the reflector (1) is placed against the lens support (12); the constant temperature device comprises a semiconductor refrigeration wafer (5), a soaking plate (6), a heat dissipation fin (3), a machine core barrel (9) and a temperature control plate (8) with a temperature sensor; a temperature control plate (8) with a temperature sensor is arranged at the top end of a machine core barrel (9) with good heat conductivity, the cold surface of a semiconductor refrigeration wafer (5) is attached to one surface or four surfaces of the machine core barrel (9), the hot surface of the semiconductor refrigeration wafer (5) is attached to a soaking plate (6), and a metal shell (4) is arranged between the soaking plate (6) and a heat dissipation fin (3); the irradiation shielding layer (11) is fixedly arranged on the shell (4) through bolts.
2. The high temperature and strong radiation resistant video apparatus of claim 1, wherein: the radiation shielding layer (11) adopts a multi-material superposition mode and comprises lead, tungsten alloy, tungsten polymer and depleted uranium.
3. The high temperature and strong radiation resistant video apparatus of claim 1, wherein: and a gap between the shell (4) and the movement barrel (9) is filled with a heat insulation layer material for isolating external heat from being conducted into the movement barrel (9).
4. A high temperature and strong radiation resistant video apparatus as claimed in claim 3, wherein: the shell (4) is connected with the upper end cover (7) by screws.
5. The high temperature and strong radiation resistant video apparatus of claim 1, wherein: the whole radiating fin (3) is of a page-shaped structure, and the middle part of the radiating fin (3) is provided with a screw hole which is fixedly connected with the shell (4) through a bolt.
6. The high temperature and strong radiation resistant video apparatus of claim 2, wherein: the irradiation shielding layer (11) is of an eccentric structure, the shielding thickness of one side close to the fuel rod is far larger than that of one side far away from the fuel rod, and the basic thickness is determined by the half-life period of the shielding material.
7. The high temperature and strong radiation resistant video apparatus of claim 1, wherein: an industrial camera and a lens (10) are nested in the movement barrel (9).
8. The high temperature and strong radiation resistant video apparatus of claim 1, wherein: the section of the adjusting support seat (2) is L-shaped, and glass or acrylic plate bolts with strong light transmittance are fixedly installed on the right side surface of the adjusting support seat (2).
9. The high temperature and strong radiation resistant video apparatus of claim 1, wherein: the semiconductor refrigeration wafer (5) is in circuit connection with the temperature control plate (8) with the temperature sensor to form a closed-loop control loop.
10. The high temperature and strong radiation resistant video apparatus of claim 9, wherein: the temperature control plate (8) with the temperature sensor compares the collected temperature in the machine core barrel (9) with the temperature set by the semiconductor refrigerating wafer (5), and then controls the semiconductor refrigerating wafer (5) to work.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811567818.6A CN111355869A (en) | 2018-12-21 | 2018-12-21 | High-temperature-resistant and irradiation-resistant video equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811567818.6A CN111355869A (en) | 2018-12-21 | 2018-12-21 | High-temperature-resistant and irradiation-resistant video equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111355869A true CN111355869A (en) | 2020-06-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811567818.6A Pending CN111355869A (en) | 2018-12-21 | 2018-12-21 | High-temperature-resistant and irradiation-resistant video equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112532933A (en) * | 2020-11-23 | 2021-03-19 | 苏州热工研究院有限公司 | Underwater wide-field panoramic monitoring device |
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2018
- 2018-12-21 CN CN201811567818.6A patent/CN111355869A/en active Pending
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