CN215832888U - Optical fiber high-temperature sensor packaging structure for online monitoring of wall temperature of electromagnetic heating plate - Google Patents
Optical fiber high-temperature sensor packaging structure for online monitoring of wall temperature of electromagnetic heating plate Download PDFInfo
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- CN215832888U CN215832888U CN202121944497.4U CN202121944497U CN215832888U CN 215832888 U CN215832888 U CN 215832888U CN 202121944497 U CN202121944497 U CN 202121944497U CN 215832888 U CN215832888 U CN 215832888U
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Abstract
The utility model provides an optical fiber high-temperature sensor packaging structure for online monitoring of wall temperature of an electromagnetic heating plate. The sensor structure comprises a heating plate gas channel and a heating plate optical fiber channel which are arranged on an electromagnetic heating plate, the heating plate gas channel is communicated with the heating plate optical fiber channel, and a pumping/inflating valve is hermetically arranged at the inlet end of the heating gas channel; the optical fiber and the optical fiber sensing element are arranged in the optical fiber channel of the heating plate, the tail optical fiber of the optical fiber and the optical fiber sensing element extends out of the optical fiber channel of the heating plate, and the extending part is hermetically connected with the optical fiber channel of the heating plate; and the optical fiber sensitive element are sealed and installedAnd then, the optical fiber channel of the heating plate is filled with protective gas through the gas channel of the heating plate. The utility model is beneficial to quickly and accurately acquiring the temperature distribution of the wall surface of the electromagnetic heating plate, and can effectively avoid O in the air of the optical fiber high-temperature sensor under the environment of long-term high temperature and radiation2、H2Damage to the optical fiber by molecules such as O can lead to failure of the sensor.
Description
Technical Field
The utility model belongs to the technical field of optical fiber sensing measurement, and particularly relates to an optical fiber high-temperature sensor packaging structure for on-line monitoring of wall temperature of an electromagnetic heating plate, which can be used for on-line measurement and early warning of the wall temperature of the electromagnetic heating plate in the field of nuclear industry.
Background
The development and utilization of nuclear energy are important development strategies of the country. Measurement and early warning of internal and external temperature parameters of nuclear reactor units and facilities are one of important measures for guaranteeing nuclear operation safety. While the development and utilization of nuclear energy are vigorously developed, the safety construction of nuclear energy is also extremely important. Such as: in the operation of a nuclear reactor unit, the overtemperature, the overpressure and the like of a fuel assembly are one of the great threats to the operation safety of the nuclear reactor. Even if the fuel element is used at a low over-temperature, the cladding material of the fuel element is greatly thermally damaged, the service life is lost, and the nuclear leakage serious accident can be caused by multiple accumulation.
The electromagnetic heating plate is an important component of the supercritical water reactor, and the monitoring of the wall temperature is an important basis for simulating the nuclear reaction test condition and critical judgment. However, the space is limited, the positions of the measuring points are dense, and strong electromagnetic interference exists, so that the temperature measuring mode of the traditional thermocouple cannot meet the test requirements.
The optical fiber temperature sensor takes quartz optical fiber as a medium, senses the change of the external temperature through optical signals, has the characteristics of electromagnetic interference resistance, small volume, radiation resistance, high and low temperature resistance and the like, and is particularly suitable for severe environments with limited space, strong radiation, electromagnetic interference and the like. Adopt optic fibre temperature sensor to generate heat the wall temperature of board to the electromagnetism and carry out on-line monitoring, can not receive the electromagnetic interference influence to go deep into the narrow and small space that generates heat and carry out accurate distributed, quick response's temperature monitoring, obtain the temperature distribution data that generate heat the board in real time. Therefore, the optical fiber temperature sensor is a better choice for online monitoring of the wall temperature of the electromagnetic heating plate, but the optical fiber temperature sensor specially aiming at online monitoring of the wall temperature of the electromagnetic heating plate is not available at present.
Disclosure of Invention
In order to solve the problems of limited space and rapid and intensive temperature monitoring of an electromagnetic heating plate, the utility model provides an optical fiber high-temperature sensor packaging structure for online monitoring of wall temperature of an electromagnetic heating plate.
In order to achieve the technical purpose, the utility model provides an optical fiber high-temperature sensor packaging structure for online monitoring of wall temperature of an electromagnetic heating plate, which is characterized in that: the sensor packaging structure comprises a heating plate gas channel and a heating plate optical fiber channel which are arranged on the electromagnetic heating plate, the heating plate gas channel is communicated with the heating plate optical fiber channel, and a pumping/inflating valve is hermetically arranged at the inlet end of the heating plate gas channel; the optical fiber and the optical fiber sensing element are arranged in the optical fiber channel of the heating plate, the tail optical fiber of the optical fiber and the optical fiber sensing element extends out of the optical fiber channel of the heating plate, and the extending part is hermetically connected with the optical fiber channel of the heating plate; and after the optical fiber and the optical fiber sensing element are sealed and installed, protective gas is filled into the optical fiber channel of the heating plate through the gas channel of the heating plate.
The utility model has the following excellent technical scheme: the sensor packaging structure comprises a heating plate gas channel and a plurality of heating plate optical fiber channels which are arranged on the electromagnetic heating plate, the plurality of heating plate optical fiber channels are arranged in parallel at equal intervals, and an optical fiber sensing element are arranged in each heating plate optical fiber channel; the tail ends of the optical fiber channels of the heating plates are connected with the outlet ends of the gas channels of the heating plates in parallel, and the tail fibers of each group of optical fibers and optical fiber sensing elements extend out of the starting ends of the optical fiber channels of the corresponding heating plates.
The further technical scheme of the utility model is as follows: the starting end of the optical fiber channel of the heating plate is hermetically connected with a transition conduit, the transition conduit is hermetically connected with a metal hose through a connector, and the tail fibers of the optical fibers and the optical fiber sensing elements extend out of the transition conduit at the starting end of the optical fiber channel of the heating plate and sequentially penetrate through the connector and the metal hose to be connected with a sensor connector.
The utility model has the following excellent technical scheme: the heating plate gas channel and the heating plate optical fiber channel are both channels which are cut close to the wall surface in the electromagnetic heating plate and have the diameter of 0.2-0.5 mm, and the optical fibers and the optical fiber sensitive elements penetrate into the heating plate optical fiber channel.
The utility model has the following excellent technical scheme: the optical fiber is a high-temperature resistant optical fiber selected from quartz optical fiber, sapphire optical fiber, YAG crystal optical fiber and photonic crystal optical fiber; the optical fiber sensitive element adopts an optical fiber grating carved by an excimer laser or a femtosecond laser and any micro-nano processing structure in an F-P cavity or an MZ cavity.
The utility model has the following excellent technical scheme: the protective gas can be any one inert gas of nitrogen, helium and argon;
the utility model has the following excellent technical scheme: the sealing and fixing connection mode between the connection positions of any two components of the heating plate optical fiber channel, the heating plate gas channel, the pumping/inflating valve, the transition conduit, the connector and the metal hose adopts any one or more of metal welding, threaded connection and high-temperature structural adhesive bonding.
The utility model has the following excellent technical scheme: the starting port of the heating plate optical fiber channel and the inlet end of the heating plate gas channel are both provided with a threaded interface, the transition duct is in threaded connection with the heating plate optical fiber channel, the pumping/inflating valve is in threaded connection with the inlet of the heating plate gas channel, and the threaded connection part is sealed and bonded by adopting high-temperature structural adhesive; and two ends of the connector are respectively sealed and fixed with the transition duct and the metal hose through metal welding or high-temperature structural adhesive bonding.
The utility model cuts the optical fiber channels with corresponding size and quantity and a gas channel communicated with the optical fiber channels at the position of the electromagnetic heating plate close to the wall surface, and the pumping/inflating valve is fixedly connected with the gas channel of the heating plate in a sealing way; intercepting certain lengths and numbers of optical fibers and optical fiber sensitive elements, penetrating a metal hose from a tail fiber end to protect a tail fiber section, penetrating the optical fibers and the optical fiber sensitive elements into a central through hole of a connector from a measuring end, sealing and fixing the metal hose and one end of the connector, penetrating the optical fibers and the optical fiber sensitive elements into a transition guide pipe from the measuring end, and sealing and fixing the other end of the connector and the transition guide pipe; the optical fiber and the optical fiber sensing element penetrate into the optical fiber channel of the heating plate from the measuring end, and the outlet of the channel is fixedly connected with the other end of the transition conduit in a sealing way; and finally, opening the pumping/inflating valve to pump the optical fiber channel of the heating plate in vacuum, and closing the valve after the protective gas is charged.
According to the technical scheme, the utility model has the following beneficial effects:
(1) the optical fiber channel of the heating plate is close to the wall surface, so that the temperature distribution of the wall surface of the electromagnetic heating plate can be rapidly and accurately acquired.
(2) The optical fiber channel of the heating plate is vacuumized and filled with protective gas, so that O in the air of the optical fiber high-temperature sensor in a long-term high-temperature and radiation environment can be effectively avoided2、H2Damage to the optical fiber by molecules such as O can lead to failure of the sensor.
(3) The size and the number of the optical fiber channels of the heating plate can be freely designed according to the technical requirements of the optical fibers and the optical fiber sensing elements, and distributed or quasi-distributed temperature measurement can be realized.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the internal structure of the hot plate fiber channel of the present invention.
In the figure: 1-optical fiber and optical fiber sensing element, 2-protective gas, 3-heating plate optical fiber channel, 4-heating plate gas channel, 5-pumping/inflating valve, 6-transition conduit, 7-connector, 8-metal hose, 9-electromagnetic heating plate, 10-sensor connector.
Detailed Description
The utility model is further illustrated by the following figures and examples. Fig. 1 to 2 are drawings of embodiments, which are drawn in a simplified manner and are only used for the purpose of clearly and concisely illustrating the embodiments of the present invention. The following claims presented in the drawings are specific to embodiments of the utility model and are not intended to limit the scope of the claimed invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "upper", "lower", "inner", "outer", "left", "right", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships that the products of the present invention are conventionally placed in use, or the orientations or positional relationships that are conventionally understood by those skilled in the art, and are used for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the equipment or elements referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.
The optical fiber high-temperature sensor packaging structure for the online monitoring of the wall temperature of the electromagnetic heating plate is characterized by comprising a heating plate gas channel 4 and a plurality of heating plate optical fiber channels 3 which are distributed on the electromagnetic heating plate, wherein the plurality of heating plate optical fiber channels 3 are distributed in parallel at equal intervals, and in practical application, the shapes and the positions of the plurality of heating plate optical fiber channels 3 can be flexibly distributed according to design; the heating plate gas channel 4 and the heating plate fiber channel 3 are small-aperture channels which are cut close to the wall surface inside the electromagnetic heating plate 9, the tail ends of the heating plate fiber channels 3 are connected with the outlet end of the heating plate gas channel 3 in parallel, a threaded connector is arranged at the inlet end of the heating plate gas channel, the threaded connector is connected with the pumping/inflating valve 5, and the connecting parts are sealed by dispensing. An optical fiber and an optical fiber sensing element 1 are arranged in each heating plate optical fiber channel 3, a thread connector is arranged at the starting end of each heating plate optical fiber channel 3 and is in thread connection with a transition conduit 6, the connection part is subjected to glue dispensing and sealing, and the transition conduit 6 is bonded with a metal hose 8 through a connector 7 by metal welding or high-temperature structural glue; the optical fiber and the tail fiber of the optical fiber sensing element 1 extend out of the transition conduit 6 at the starting end of the optical fiber channel 3 of the heating plate, sequentially pass through the connector 7 and the metal hose 8, and then are connected with the sensor joint 10. After the optical fiber and the optical fiber sensing element 1 are sealed and installed, the pumping/inflating valve 5 is opened, and the heating plate optical fiber channel 3 is filled with protective gas 2 through the heating plate gas channel 4.
The optical fiber is a high-temperature resistant optical fiber selected from quartz optical fiber, sapphire optical fiber, YAG crystal optical fiber and photonic crystal optical fiber; the optical fiber sensitive element adopts an optical fiber grating carved by an excimer laser or a femtosecond laser and any micro-nano processing structure in an F-P cavity or an MZ cavity. The protective gas may be any one of inert gases such as nitrogen, helium and argon.
The preparation process of the utility model is further explained by combining specific embodiments, in the following embodiments, the optical fiber and the optical fiber sensitive element 1 adopt polyimide coated pure quartz optical fiber and II-type optical fiber grating array engraved by a femtosecond laser, and the long-term working temperature of the array can reach 700 ℃; the protective gas 2 is nitrogen, has stable performance in high-temperature and radiation environments, and can reliably protect the optical fiber and the optical fiber sensitive element 1 for a long time; the aperture of the heating plate optical fiber channel 3 and the heating plate gas channel 4 is 800 μm, and the channel openings are in an internal thread structure; the pumping/inflating valve 5 is a ball valve made of stainless steel, one end of the valve is provided with an external thread matched with the aperture of 800 mu m, and the other end of the valve can be connected with a vacuum pumping and inflating device; the transition duct 6 is designed into a cylindrical stainless steel thin tube with one end provided with an external thread structure matched with the aperture of 800 microns and a through hole in the center, the outer diameter of the stainless steel thin tube is 800 microns, and the central through hole is 200 microns; the connector 7 is designed into a cylindrical stainless steel welding connector with annular grooves at two ends and a through hole at the center, the outer diameter of the connector is 1mm, and the diameter of the central through hole is 200 mu m; the metal hose 8 is a single-core stainless steel hose armored optical cable with the outer diameter of 700 mu m.
The specific preparation process of the optical fiber high-temperature sensor packaging structure for online monitoring of the wall temperature of the electromagnetic heating plate in the embodiment is as follows:
(1) three heating plate optical fiber channels 3 with the length of 1m and the aperture of 800 mu m and a heating plate gas channel 4 communicated with the heating plate optical fiber channels 3 are cut at the position where the electromagnetic heating plate 9 is close to the wall surface, and internal thread structures are reserved at the outlets of all the channels.
(2) Cleaning the heating plate optical fiber channel 3 and the heating plate gas channel 4 to ensure that no impurities and oil stain residues exist; after cleaning, each channel is sealed to prevent secondary pollution.
(3) The inlet end of the gas channel 4 of the heating plate is connected with a pumping/inflating valve 5 through a thread structure, and is sealed by dispensing; and then, carrying out air tightness check to ensure the tightness of the channel.
(4) Respectively penetrating three optical fibers with the length of 2m and an optical fiber sensing element 1 into three metal hoses 8 from a tail fiber end to protect a tail fiber section; then, after the three optical fibers and the optical fiber sensing element 1 are respectively penetrated into central through holes of the three connectors 7 from the measuring end, the three metal hoses 8 are respectively inserted into annular grooves corresponding to one ends of the connectors 7 and are sealed and fixed through metal welding; then, after the three optical fibers and the optical fiber sensing element 1 are respectively penetrated into central through holes of three transition guide pipes 6 from a measuring end, the three transition guide pipes 6 are respectively inserted into annular grooves corresponding to the other end of the connector 7, and then are sealed and fixed through metal welding; and finally, respectively penetrating the three packaged optical fibers and the optical fiber sensing element 1 into three heating plate optical fiber channels 3 from the measuring end, respectively, fixedly connecting the outlet of each channel with the other end of the corresponding transition guide pipe 6 through a thread structure, and dispensing and sealing.
(5) And opening the pumping/inflating valve 5 to pump the heating plate optical fiber channel 3 to be vacuum, and closing the valve after the protective gas 2 is charged. And finishing the manufacture of the sensor packaging structure.
In summary, the present invention is described as an embodiment, but the present invention is not limited to the above embodiment, and any similar or identical means may be used to achieve the technical effects of the present invention, and all such means should fall within the protection scope of the present invention.
Claims (8)
1. The utility model provides an electromagnetism generates heat board wall temperature on-line monitoring's optic fibre high temperature sensor packaging structure which characterized in that: the sensor packaging structure comprises a heating plate gas channel (4) and a heating plate optical fiber channel (3) which are arranged on an electromagnetic heating plate (9), the heating plate gas channel (4) is communicated with the heating plate optical fiber channel (3), and an air pumping/inflating valve (5) is hermetically arranged at the inlet end of the heating plate gas channel (4); an optical fiber and an optical fiber sensing element (1) are arranged in the heating plate optical fiber channel (3), a tail fiber of the optical fiber and optical fiber sensing element (1) extends out of the heating plate optical fiber channel (3), and the extending part is hermetically connected with the heating plate optical fiber channel (3); and after the optical fiber and the optical fiber sensing element (1) are sealed and installed, protective gas (2) is filled in the optical fiber channel (3) of the heating plate through the gas channel (4) of the heating plate.
2. The optical fiber high-temperature sensor packaging structure for the online monitoring of the wall temperature of the electromagnetic heating plate according to claim 1, characterized in that: the sensor packaging structure comprises a heating plate gas channel (4) and a plurality of heating plate optical fiber channels (3) which are arranged on an electromagnetic heating plate, the plurality of heating plate optical fiber channels (3) are arranged in parallel at equal intervals, and optical fibers and optical fiber sensing elements (1) are arranged in each heating plate optical fiber channel (3); the tail ends of the heating plate optical fiber channels (3) are connected with the outlet ends of the heating plate gas channels (4) in parallel, and the tail optical fiber of each group of optical fibers and the optical fiber sensing element (1) extends out of the starting end of the corresponding heating plate optical fiber channel (3).
3. The optical fiber high temperature sensor packaging structure for the wall temperature online monitoring of the electromagnetic heating plate according to claim 1 or 2, characterized in that: the starting end of the heating plate optical fiber channel (3) is connected with a transition conduit (6) in a sealing mode, the transition conduit (6) is connected with a metal hose (8) in a sealing mode through a connector (7), and the tail fiber of the optical fiber and optical fiber sensing element (1) extends out of the transition conduit (6) of the starting end of the heating plate optical fiber channel (3) and sequentially penetrates through the connector (7) and the metal hose (8) to be connected with a sensor connector (10).
4. The optical fiber high temperature sensor packaging structure for the wall temperature online monitoring of the electromagnetic heating plate according to claim 1 or 2, characterized in that: the heating plate gas channel (4) and the heating plate optical fiber channel (3) are channels which are formed inside the electromagnetic heating plate (9) and close to the wall surface, and the diameter of each channel is 0.2-0.5 mm, and the optical fibers and the optical fiber sensitive elements penetrate into the heating plate optical fiber channel (3).
5. The optical fiber high temperature sensor packaging structure for the wall temperature online monitoring of the electromagnetic heating plate according to claim 1 or 2, characterized in that: the optical fiber is a high-temperature resistant optical fiber selected from quartz optical fiber, sapphire optical fiber, YAG crystal optical fiber and photonic crystal optical fiber; the optical fiber sensitive element adopts an optical fiber grating carved by an excimer laser or a femtosecond laser and any micro-nano processing structure in an F-P cavity or an MZ cavity.
6. The optical fiber high temperature sensor packaging structure for the wall temperature online monitoring of the electromagnetic heating plate according to claim 1 or 2, characterized in that: the protective gas may be any one of inert gases such as nitrogen, helium and argon.
7. The optical fiber high-temperature sensor packaging structure for the online monitoring of the wall temperature of the electromagnetic heating plate according to claim 3, characterized in that: the sealing and fixing connection mode between the connection positions of any two components of the heating plate optical fiber channel (3), the heating plate gas channel (4), the pumping/inflating valve (5), the transition conduit (6), the connector (7) and the metal hose (8) adopts any one or more of metal welding, threaded connection and high-temperature structural adhesive bonding.
8. The optical fiber high-temperature sensor packaging structure for the online monitoring of the wall temperature of the electromagnetic heating plate according to claim 3, characterized in that: the starting port of the heating plate optical fiber channel (3) and the inlet end of the heating plate gas channel (4) are both provided with a threaded interface, the transition duct (6) is in threaded connection with the heating plate optical fiber channel (3), the pumping/inflating valve (5) is in threaded connection with the inlet of the heating plate gas channel (4), and the threaded connection part is sealed and bonded by adopting high-temperature structural adhesive; and two ends of the connector (7) are respectively sealed and fixed with the transition guide pipe (6) and the metal hose (8) through metal welding or high-temperature structural adhesive bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121944497.4U CN215832888U (en) | 2021-08-18 | 2021-08-18 | Optical fiber high-temperature sensor packaging structure for online monitoring of wall temperature of electromagnetic heating plate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121944497.4U CN215832888U (en) | 2021-08-18 | 2021-08-18 | Optical fiber high-temperature sensor packaging structure for online monitoring of wall temperature of electromagnetic heating plate |
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| Publication Number | Publication Date |
|---|---|
| CN215832888U true CN215832888U (en) | 2022-02-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121944497.4U Active CN215832888U (en) | 2021-08-18 | 2021-08-18 | Optical fiber high-temperature sensor packaging structure for online monitoring of wall temperature of electromagnetic heating plate |
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| CN (1) | CN215832888U (en) |
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- 2021-08-18 CN CN202121944497.4U patent/CN215832888U/en active Active
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