CN210136109U - Nuclear facility accident condition radioactive gas sampling and adsorption medium inspection device - Google Patents
Nuclear facility accident condition radioactive gas sampling and adsorption medium inspection device Download PDFInfo
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- CN210136109U CN210136109U CN201920434574.8U CN201920434574U CN210136109U CN 210136109 U CN210136109 U CN 210136109U CN 201920434574 U CN201920434574 U CN 201920434574U CN 210136109 U CN210136109 U CN 210136109U
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Abstract
The utility model relates to a nuclear facility accident condition radioactive gas sampling and adsorption medium inspection device, which comprises an upper main body and a lower main body which are connected with each other, wherein the upper main body and the lower main body are connected by a fastener; the both ends opening of adsorption medium filling box, the circular sieve of stainless steel jump ring installation is passed through to the both ends opening part of adsorption medium filling box, is equipped with the through-hole on the circular sieve, and two circular sieves and adsorption medium filling box enclose into adsorption medium and fill the chamber, and adsorption medium fills the intracavity and places adsorption medium. The device can accurately obtain the efficiency of the adsorption medium for removing the radioactive gas, provides accurate data for the selection of the adsorption medium and the use amount of the adsorption medium under the accident condition of the nuclear facility, and can be applied to the evaluation experiment of the adsorption capacity and the availability of the in-service adsorption medium.
Description
Technical Field
The utility model relates to an air purification technical field, concretely relates to nuclear facility accident operating mode and relevant simulation experiment radioactive gas sampling and adsorption medium efficiency inspection's double-deck sealed verifying attachment under high temperature, high pressure, the high humidity condition.
Background
In the field of nuclear air purification technology, an adsorption device is often used to adsorb radioactive gas, so as to reduce the influence of diffusion and leakage of the radioactive gas on occupations, the public and the environment. In order to ensure the usability of the adsorption apparatus, it is necessary to perform adsorption performance test on the adsorption medium in the adsorption apparatus.
The accident condition of the nuclear facility is a high-temperature, high-pressure and high-humidity radioactive gas environment, and the adsorption efficiency of the adsorption medium for removing the radioactive gas under the accident condition is directly related to the safe emission of the radioactive gas and the safety of the public and the environment. Since the chernobeli nuclear accident, especially the fukushima nuclear accident, the problem of exposure to monitoring and removal of radioactive effluents is very prominent, and countries around the world put higher demands on the safety of nuclear facilities. Therefore, under special test environment or accident conditions, the radioactive gas sampling and adsorption medium inspection device must meet the harsh conditions of high temperature, high pressure, high humidity and the like and have the requirements of strict sealing and quick assembly and disassembly, thereby meeting the inspection requirements and avoiding the damage of radioactive gas leakage to practitioners. The existing radioactive gas sampling and adsorption medium inspection device is not complete in integral structure.
SUMMERY OF THE UTILITY MODEL
The utility model aims at solving the defect that prior art exists, provide a nuclear facility accident operating mode radioactive gas sampling and adsorption medium verifying attachment.
In order to realize the purpose, the utility model discloses a technical scheme as follows:
the radioactive gas sampling and adsorption medium inspection device comprises an upper main body and a lower main body which are connected with each other, wherein the upper main body and the lower main body are connected through a fastener;
the both ends opening of adsorption medium filling box, the fixed circular sieve of stainless steel jump ring is passed through to the both ends opening part of adsorption medium filling box, is equipped with the through-hole on the circular sieve, and two circular sieves and adsorption medium filling box enclose into adsorption medium and fill the chamber, and adsorption medium fills the intracavity and places adsorption medium.
Furthermore, a first O-shaped sealing ring is arranged between the adjacent adsorption medium filling boxes and is sealed by the upper end face and the lower end face of each adsorption medium filling box in an extrusion manner.
Further, an upper main body pressure measuring hole or a temperature measuring hole is formed in the top of the upper main body, a lower main body pressure measuring hole or a temperature measuring hole is formed in the lower main body, and the lower main body pressure measuring hole or the temperature measuring hole and the upper main body pressure measuring hole or the temperature measuring hole are connected with a temperature sensor, a pressure sensor or a differential pressure sensor.
Further, the bottom of going up the main part is equipped with annular flange, and the outside of going up annular flange is equipped with the external screw thread, the outside of main part is equipped with the lower annular flange that corresponds with last annular flange down, have the concatenation installing port on the fastener, be equipped with the internal thread on the inner wall of concatenation installing port, in the bottom of going up the main part and the top of lower main part stretched into the concatenation installing port, the internal thread of concatenation installing port with the external screw thread meshing of last annular flange.
Further, be equipped with second type O type sealing washer in the concatenation installing port, the bottom of going up the annular flange is equipped with main part second type O type sealing washer and compresses tightly and spacing terminal surface, and the top of lower annular flange is equipped with down main part second type O type sealing washer and compresses tightly the terminal surface, goes up main part second type O type sealing washer and compresses tightly and spacing terminal surface and lower main part second type O type sealing washer compress tightly terminal surface and second type O type sealing washer in close contact with.
Furthermore, the top of the lower main body is provided with a first O-shaped sealing ring pressing end face, and the first O-shaped sealing ring pressing end face is in close contact with a first O-shaped sealing ring at the bottom of the adsorption medium filling box in the upper main body.
Furthermore, the top of the inner cavity of the upper main body is provided with a first O-shaped sealing ring clamping groove.
Furthermore, the outer rings of the upper end face and the lower end face of each adsorption medium filling box are flat, and the upper end face and the lower end face of each adsorption medium filling box are in seamless fit with the first type of O-shaped sealing rings on the adjacent adsorption medium filling boxes.
Furthermore, the aperture of the through holes on the circular sieve plate is smaller than the particle size of the adsorption medium.
The utility model has the advantages that: the gas sampling and adsorption medium inspection device adopts a double-layer sealing mode to ensure that no radioactive gas is released into the environment when gas flow passes through the adsorption medium. The adsorption medium filling boxes are overlapped in the gas sampling and adsorption medium testing device in an independent unit mode, each adsorption medium filling box is filled with the adsorption medium with the thickness of 10/25mm, and 4-8 units are overlapped. The adsorption medium loading boxes with different loading thicknesses can be flexibly assembled according to the adsorption performance and the inspection purpose of the test medium. Different types of adsorption media can be matched for use; the adsorption medium inspection device can accurately obtain the efficiency of the adsorption medium for removing the radioactive gas, provides accurate data for the selection of the adsorption medium and the use amount of the adsorption medium under the accident condition of the nuclear facility, and can be applied to the evaluation experiment of the adsorption capacity and the availability of the in-service adsorption medium.
Drawings
Fig. 1 is a schematic structural view of the present invention;
fig. 2 is a schematic combination view of the upper body and the lower body of the present invention;
FIG. 3 is a schematic cross-sectional view of the adsorption media cassette of the present invention;
FIG. 4 is a schematic view of the assembly of the adsorption media cassette and the circular sieve plate of the present invention;
FIG. 5 is a schematic cross-sectional view of a fastener of the present invention;
fig. 6 is a schematic top view of the fastener of the present invention.
Detailed Description
As shown in fig. 1 to 6, the radioactive gas sampling and adsorption medium inspection device for nuclear facility accident conditions comprises an upper main body 2 and a lower main body 6 which are connected with each other, wherein the upper main body 2 and the lower main body 6 are connected through a fastener 5, the upper main body 2 and the lower main body 6 are hollow, a plurality of adsorption medium filling boxes 4 which are overlapped are installed in the upper main body 2, the adsorption medium filling boxes 4 are positioned above the inner cavity of the lower main body 6, the lower main body 6 is provided with an air inlet 7 communicated with the inner cavity of the lower main body, and the top of the upper main body 2 is provided with an air outlet 1;
further, the both ends opening of adsorption medium cartridge 4, the fixed circular sieve 17 of stainless steel jump ring is passed through to the both ends opening part of adsorption medium cartridge 4, is equipped with the through-hole on the circular sieve 17, and two circular sieve 17 and adsorption medium cartridge 4 enclose into adsorption medium and fill the chamber, and adsorption medium fills the intracavity and places adsorption medium, and the aperture of through-hole is less than adsorption medium's particle diameter on the circular sieve 17. The adsorption medium can be various adsorption media such as activated carbon, molecular sieve, zeolite and the like.
The circular sieve plate 17 at one end of the adsorption medium loading box 4 is welded on the adsorption medium loading box 4. The round sieve plate 17 at the other end is fixed by a stainless steel clamp spring 16 (clamped and embedded in a clamp spring groove). In addition, a first O-shaped sealing ring 3 is arranged between the adjacent adsorption medium filling boxes 4;
in the embodiment of the present invention, the first O-ring 3 and the adsorption medium cassette 4 are pressed and sealed by the upper and lower end faces 18 of the adsorption medium cassette 4, both are contact-type pressing, the first O-ring 3 is not installed on the adsorption medium cassette, in this embodiment, the space of the adsorption medium cassette 4 is limited, so the first O-ring 3 and the adsorption medium cassette 4 are pressed and sealed by the upper and lower end faces 18 of the adsorption medium cassette 4, but it is not excluded that the two end faces of the adsorption medium cassette 4 are provided with the sealing ring mounting grooves, the first O-ring is installed in the sealing ring mounting grooves, thus the first O-ring can be firmly installed, in this embodiment, the adsorption medium cassette 4 is also suitable for setting the sealing ring mounting grooves at the two ends of the adsorption medium cassette 4 under the allowable size, and a first type of O-shaped sealing ring is arranged in the sealing ring mounting groove.
Further, the top of the upper main body 2 is provided with an upper main body pressure measuring hole or temperature measuring hole 10, the lower main body 6 is provided with a lower main body pressure measuring hole or temperature measuring hole 8, and the lower main body pressure measuring hole or temperature measuring hole 8 and the upper main body pressure measuring hole or temperature measuring hole 10 are connected with a temperature sensor, a pressure sensor or a differential pressure sensor.
Go up the bottom of main part 2 and be equipped with annular flange 20 on, the outside of going up annular flange 20 is equipped with external screw thread 12, the outside of lower main part 6 is equipped with the lower annular flange 21 that corresponds with annular flange 20 on, have concatenation installing port 22 on the fastener 5, be equipped with the internal thread on the inner wall of concatenation installing port 22, go up the bottom of main part 2 and the top of lower main part 6 stretch into in concatenation installing port 22, the internal thread of concatenation installing port 22 meshes with the external screw thread 12 of last annular flange 20. The outer side of the fastener 5 is provided with a certain number of cuboid-shaped bulges 19, and the bulges 19 are easy to fasten without tools and are convenient to fasten by using a special spanner. The screw thread fastening is sealed, and the dismouting is rapid, and consuming time is short, and is simple and easy convenient.
Further, a second-type O-ring 9 is arranged in the splicing mounting opening 22, the bottom of the upper annular flange 20 is provided with an upper main body and a second-type O-ring pressing and limiting end face 15, the top of the lower annular flange 21 is provided with a lower main body and a second-type O-ring pressing end face 14, and the upper main body and the second-type O-ring pressing and limiting end face 15 and the lower main body and the second-type O-ring pressing end face 14 are in close contact with the second-type O-ring 9.
Further, the top of the lower main body 6 is provided with a first O-shaped sealing ring pressing end face 13, and the first O-shaped sealing ring pressing end face 13 is in close contact with the first O-shaped sealing ring 3 at the bottom of the adsorption medium filling box 4 in the upper main body.
Further, the utility model discloses in, the top of going up 2 inner chambers of main part is equipped with first type O type sealing washer draw-in groove 11. The outer rings of the upper end face and the lower end face of the adsorption medium filling box 4 are flat, and the upper end face and the lower end face 18 of the adsorption medium filling box 4 are in seamless fit with the first type of O-shaped sealing ring 3 on the adjacent adsorption medium filling box.
The adsorption medium filling box 4 is extruded among the layers through the first type O-shaped sealing ring 3, the first type O-shaped sealing ring clamping groove 11 and the first type O-shaped sealing ring pressing end face 13 to form a first layer of seal. The lower main body second type O-shaped sealing ring pressing end face 14 and the upper main body second type O-shaped sealing ring pressing and limiting end face 15 of the gas sampling and adsorption medium inspection device form a second layer of sealing by extruding the second type O-shaped sealing ring 9. The first O-shaped sealing ring 3 is a high-temperature-resistant soft pad with obvious compression deformation, the use temperature is higher than 200 ℃, the pressure is higher than 1MPa, and the materials are silica gel, fluororubber and the like. The second O-shaped sealing ring 9 is a high-temperature resistant hard pad with small compression deformation, the service temperature is more than 200 ℃, the pressure is more than 1MPa, and the material is polytetrafluoroethylene and the like. The double-layer sealing ensures that radioactive gas cannot escape from the gas sampling and adsorption medium inspection device and leak to the environment when the radioactive gas flow passes through the adsorption medium. The gas sampling and adsorption medium inspection device adopts a double-layer sealing structure, so that the leakage risk of radioactive gas is reduced, and the safety of experimenters is improved.
A first O-shaped sealing ring clamping groove 11 of the gas sampling and adsorption medium inspection device has a limiting effect on a first O-shaped sealing ring and extrudes the first O-shaped sealing ring 3 together with a first O-shaped sealing ring pressing end face 13 to realize a sealing effect. The upper main body second O-shaped sealing ring pressing and limiting end face 15 of the gas sampling and adsorption medium inspection device has a limiting effect on the second O-shaped sealing ring 9, and extrudes the second O-shaped sealing ring together with the lower main body second O-shaped sealing ring pressing end face 14 to realize a sealing effect. The external thread 12 of the upper annular flange 20 and the fastener 5 are used for connecting the upper body 2 and the lower body 6 through threads and pressing the first-type O-shaped sealing ring and the second-type O-shaped sealing ring to play a sealing role.
The lower body pressure measuring hole or temperature measuring hole 8 and the upper body pressure measuring hole or temperature measuring hole 10 can be connected with a pressure sensor or a differential pressure sensor to monitor the pressure difference value and the absolute pressure value of the adsorption medium under the condition of airflow. A temperature sensor may also be connected to monitor the temperature change at the inlet/outlet when the high humidity gas stream passes through the adsorbent media.
The adsorption medium filling box 4 is made of hard high-temperature-resistant and small-deformation metal such as stainless steel, aluminum alloy and the like as a shell. The adsorption medium filling box 4 adopts a detachable design, and can replace the adsorption medium as required so as to realize repeated utilization. When the adsorption medium is replaced, only the clamp spring needs to be removed, and the upper end circular sieve plate is taken out to be filled with a new adsorption medium. After the adsorption medium is filled, the circular sieve plate is sequentially covered, the clamp spring is additionally arranged, and the adsorption medium is sealed in the filling box.
The adsorption medium filling box 4 is used as a complete medium sealing unit to be operated as a whole during device connection or measurement after radioactive gas adsorption, the operation is simple and convenient, and the diffusion of radioactive substances caused by the scattering of the adsorption medium is avoided.
The severe working condition under the loss of coolant accident (LOCA) in the containment vessel of the nuclear power station is that the absolute pressure is 0.52MPa, the maximum average temperature is 145 ℃, and the maximum relative humidity is 100%. The gas sampling and adsorption medium inspection device has the use temperature range of-20-200 ℃, the pressure range of 0-1MPa and the relative humidity of 0-100 percent. The related parameters of the gas sampling and adsorption medium inspection device meet the application requirements of nuclear facility accident conditions and simulated environmental conditions.
The gas sampling and adsorption medium inspection device is used in the process that ① removes a clamp spring of an adsorption medium filling box, a circular sieve plate at the upper end is taken out, adsorption media are filled, the circular sieve plate is restored and the clamp spring is reloaded, the adsorption medium filling box is filled completely, ② fixes a first type O-shaped sealing ring 3 in a first type O-shaped sealing ring clamping groove 11, an appropriate number of adsorption medium filling boxes 4 are filled according to experimental requirements, the first type O-shaped sealing ring 3 is additionally arranged between layers of the adsorption medium filling box 4, a second type O-shaped sealing ring 9 is fixed on the compression and limiting end face of the second type O-shaped sealing ring of an upper main body by ③, the upper main body and the lower main body are connected by a fastening piece 3 and are fastened and sealed by threads, ④ is provided with appropriate sensors according to experimental requirements at upper and lower pressure measuring holes or temperature measuring holes, the inspection device for gas sampling and adsorption media is connected to a relevant experimental device through an air inlet 7 and an air outlet 1 after the air tightness inspection is qualified, the inspection device for radioactive gas sampling or adsorption media inspection is connected to a relevant experimental device, the gas sampling and the adsorption media inspection device after the experimental device is completed in the air tightness inspection, 3892.
The adsorption medium inspection device can accurately obtain the efficiency of the adsorption medium for removing the radioactive gas, provides accurate data for the selection of the adsorption medium and the use amount of the adsorption medium under the accident condition of the nuclear facility, and can be applied to the evaluation experiment of the adsorption capacity and the availability of the in-service adsorption medium.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the principles of the present invention may be applied to any other embodiment without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The radioactive gas sampling and adsorption medium inspection device for nuclear facility accident working conditions comprises an upper main body and a lower main body which are connected with each other, and is characterized in that the upper main body and the lower main body are connected through a fastener, the interiors of the upper main body and the lower main body are hollow, a plurality of superposed adsorption medium filling boxes are installed in the upper main body, the adsorption medium filling boxes are positioned above an inner cavity of the lower main body, an air inlet communicated with the inner cavity of the lower main body is formed in the lower main body, and an air outlet is formed in the top of the upper main body;
the both ends opening of adsorption medium filling box, the fixed circular sieve of stainless steel jump ring is passed through to the both ends opening part of adsorption medium filling box, is equipped with the through-hole on the circular sieve, and two circular sieves and adsorption medium filling box enclose into adsorption medium and fill the chamber, and adsorption medium fills the intracavity and places adsorption medium.
2. The nuclear facility accident situation radioactive gas sampling and adsorption medium inspection device according to claim 1, wherein a first type of O-shaped sealing ring is arranged between adjacent adsorption medium filling boxes, and the first type of O-shaped sealing ring is sealed by the upper end face and the lower end face of each adsorption medium filling box in an extrusion manner.
3. The nuclear facility accident condition radioactive gas sampling and adsorbing medium inspection device according to claim 1 or 2, wherein an upper main body pressure measuring hole or a temperature measuring hole is arranged at the top of the upper main body, a lower main body pressure measuring hole or a temperature measuring hole is arranged on the lower main body, and the lower main body pressure measuring hole or the temperature measuring hole and the upper main body pressure measuring hole or the temperature measuring hole are connected with a temperature sensor, a pressure sensor or a differential pressure sensor.
4. The nuclear facility accident situation radioactive gas sampling and adsorbing medium inspection device according to claim 3, wherein an upper annular flange is arranged at the bottom of the upper main body, an external thread is arranged on the outer side of the upper annular flange, a lower annular flange corresponding to the upper annular flange is arranged on the outer side of the lower main body, the fastener is provided with a splicing installation port, an internal thread is arranged on the inner wall of the splicing installation port, the bottom of the upper main body and the top of the lower main body extend into the splicing installation port, and the internal thread of the splicing installation port is meshed with the external thread of the upper annular flange.
5. The nuclear facility accident situation radioactive gas sampling and adsorbing medium inspection device according to claim 4, wherein a second O-shaped sealing ring is arranged in the splicing installation port, the bottom of the upper annular flange is provided with an upper main body second O-shaped sealing ring pressing and limiting end face, the top of the lower annular flange is provided with a lower main body second O-shaped sealing ring pressing end face, and the upper main body second O-shaped sealing ring pressing and limiting end face and the lower main body second O-shaped sealing ring pressing end face are in close contact with the second O-shaped sealing ring.
6. The nuclear facility accident situation radioactive gas sampling and adsorbing medium inspection device according to claim 4, wherein a first type O-shaped sealing ring pressing end face is arranged at the top of the lower main body, and the first type O-shaped sealing ring pressing end face is in close contact with a first type O-shaped sealing ring at the bottom of the adsorbing medium filling box in the upper main body.
7. The nuclear facility accident situation radioactive gas sampling and adsorbing medium testing device according to claim 4, wherein a first type O-shaped sealing ring clamping groove is formed in the top of the inner cavity of the upper main body.
8. The nuclear facility accident condition radioactive gas sampling and adsorption medium inspection device according to claim 4, wherein the outer rings of the upper end face and the lower end face of the adsorption medium loading box are flat, and the upper end face and the lower end face of the adsorption medium loading box are in seamless fit with the first type O-shaped sealing rings on the adjacent adsorption medium loading boxes.
9. The nuclear facility accident situation radioactive gas sampling and adsorption medium inspection device of claim 1, wherein the aperture of the through holes on the circular sieve plate is smaller than the particle size of the adsorption medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920434574.8U CN210136109U (en) | 2019-04-02 | 2019-04-02 | Nuclear facility accident condition radioactive gas sampling and adsorption medium inspection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920434574.8U CN210136109U (en) | 2019-04-02 | 2019-04-02 | Nuclear facility accident condition radioactive gas sampling and adsorption medium inspection device |
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| CN210136109U true CN210136109U (en) | 2020-03-10 |
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| CN201920434574.8U Active CN210136109U (en) | 2019-04-02 | 2019-04-02 | Nuclear facility accident condition radioactive gas sampling and adsorption medium inspection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125649A (en) * | 2021-04-14 | 2021-07-16 | 中国人民解放军火箭军工程大学 | Propellant solid adsorbent adsorption performance detection device and comprehensive performance detection method |
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2019
- 2019-04-02 CN CN201920434574.8U patent/CN210136109U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113125649A (en) * | 2021-04-14 | 2021-07-16 | 中国人民解放军火箭军工程大学 | Propellant solid adsorbent adsorption performance detection device and comprehensive performance detection method |
| CN113125649B (en) * | 2021-04-14 | 2022-12-27 | 中国人民解放军火箭军工程大学 | Propellant solid adsorbent adsorption performance detection device and comprehensive performance detection method |
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