CN219978539U - High-pressure ionization chamber radiation monitor - Google Patents
High-pressure ionization chamber radiation monitor Download PDFInfo
- Publication number
- CN219978539U CN219978539U CN202321269711.XU CN202321269711U CN219978539U CN 219978539 U CN219978539 U CN 219978539U CN 202321269711 U CN202321269711 U CN 202321269711U CN 219978539 U CN219978539 U CN 219978539U
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- ionization chamber
- pressure ionization
- radiation monitor
- spherical detector
- fixing gasket
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- 230000005855 radiation Effects 0.000 title claims abstract description 41
- 229910052751 metal Inorganic materials 0.000 claims abstract description 23
- 239000002184 metal Substances 0.000 claims abstract description 23
- 230000008054 signal transmission Effects 0.000 claims abstract description 18
- 238000007789 sealing Methods 0.000 claims description 35
- 230000005540 biological transmission Effects 0.000 claims description 11
- 229910000838 Al alloy Inorganic materials 0.000 claims description 8
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 8
- 238000004891 communication Methods 0.000 claims description 7
- 239000011261 inert gas Substances 0.000 claims description 7
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 229910052786 argon Inorganic materials 0.000 claims description 4
- 229910052755 nonmetal Inorganic materials 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000010935 stainless steel Substances 0.000 claims description 3
- 229910001256 stainless steel alloy Inorganic materials 0.000 claims description 3
- 239000006260 foam Substances 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- 238000012544 monitoring process Methods 0.000 abstract description 10
- 230000007613 environmental effect Effects 0.000 description 6
- 239000007789 gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000005865 ionizing radiation Effects 0.000 description 1
- 239000006262 metallic foam Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012857 radioactive material Substances 0.000 description 1
- 230000004043 responsiveness Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
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- Measurement Of Radiation (AREA)
Abstract
The utility model provides a high-pressure ionization chamber radiation monitor which comprises a shell, a fixed liner, a spherical detector, a metal rod, a circuit signal transmission device and an end cover. According to the high-pressure ionization chamber radiation monitor, the vibration resistance of the high-pressure ionization chamber radiation monitor is improved by filling the fixing gasket among the shell, the end cover and the spherical detector, the interference of vibration on the circuit signal transmission device is reduced, and the accuracy of the monitoring result of the high-pressure ionization chamber radiation monitor is improved.
Description
Technical Field
The utility model belongs to the technical field of environmental radiation monitoring equipment, and particularly relates to a high-pressure ionization chamber radiation monitor.
Background
Environmental radiation monitoring refers to monitoring performed to estimate or control a range of environmental radiation levels or radioactive material pollution levels around a nuclear facility, and public collective radiation dose equivalents. With the development of the nuclear industry in China, environmental gamma radiation monitoring is also receiving increasing attention. The traditional environmental radiation monitor mainly adopts two types of detectors, namely a GM tube and a high-pressure ionization chamber. GM tubes are rarely used as accurate measuring instruments due to short service lives, large statistical fluctuations, etc. The high-pressure ionization chamber has the characteristics of simple structure, stable performance, long service life and the like, and is widely applied to the field of environmental radiation monitoring.
The high-pressure ionization chamber is a detector for measuring ionizing radiation by utilizing the gas radiation ionization effect, and generally adopts a closed cavity with metal as a shell, wherein the shell is a high-pressure electrode, a voltage of minus hundreds of volts is applied to the shell, and a metal rod is arranged inside the high-pressure ionization chamber and used as a collector, and the voltage is close to ground. An inert gas, typically argon, is located between the collector and the high-pressure electrode. When gamma rays in the environment penetrate through the shell and enter the chamber, gas in the chamber is continuously ionized along the way, so that ion electron pairs are formed. Under the action of an electric field, electrons are enriched to a high-voltage electrode, and ions are enriched to a collector electrode. The high voltage pole and the collector are led out to form a loop, so that a current signal is formed. The current signal is converted into a voltage signal after being amplified by operation. The voltage signal is in direct proportion to the gamma radiation dose rate, so the gamma radiation dose rate can be reversely deduced by measuring the voltage.
Because the current signal output by the ionization chamber is very weak (femto-ampere level), the design requirement on the charge sensitive amplifying circuit is very high, the circuit of the level is sensitive to vibration, the vibration resistance performance of the current high-pressure ionization chamber radiation monitor is poor, and the monitoring result of the high-pressure ionization chamber radiation monitor is inaccurate due to the interference of vibration on the current signal.
Disclosure of Invention
The utility model aims to provide a high-pressure ionization chamber radiation monitor, which aims to solve the technical problem of poor vibration resistance of the high-pressure ionization chamber radiation monitor in the prior art.
In order to achieve the above purpose, the utility model adopts the following technical scheme: there is provided a high pressure ionization chamber radiation monitor comprising:
a housing;
a fixing pad filled in the case; the fixing gasket comprises a first fixing gasket and a second fixing gasket, the first fixing gasket is filled at the end part of the shell, and a first arc-shaped groove is formed in the first fixing gasket; the second fixing gasket is adjacent to the first fixing gasket, a cavity is formed in the middle of the second fixing gasket, and a second arc-shaped groove is formed in one end, close to the first fixing gasket, of the second fixing gasket;
the spherical detector is fixed in the first arc-shaped groove and the second arc-shaped groove, and the outer surface of the spherical detector is abutted with the inner walls of the first arc-shaped groove and the second arc-shaped groove; inert gas is filled in the spherical detector;
one end of the metal rod is arranged at the sphere center of the spherical detector, and the other end of the metal rod extends out of the outer surface of the spherical detector;
the circuit signal transmission device is arranged in the cavity and is electrically connected with one end of the metal rod extending out of the outer surface of the spherical detector through a transmission line; the method comprises the steps of,
an end cover, which is covered on the shell; and the end cover is provided with a communication interface, a power interface and a power switch which are communicated with the circuit signal transmission device.
Further, the sealing device also comprises a sealing cavity and a sealing cover plate; the circuit signal transmission device comprises a front-end analog amplifying circuit and a data acquisition circuit; one end of the sealing cavity is connected to the outer surface of the spherical detector, the other end of the sealing cavity is sealed by the sealing cover plate, the front-end analog amplifying circuit is electrically connected with one end, extending out of the outer surface of the spherical detector, of the metal rod through a transmission line, and the front-end analog amplifying circuit is fixed in the sealing cavity;
the sealing cover plate is provided with a wire outlet hole, and a transmission wire of the data acquisition circuit is electrically connected with the front-end analog amplifying circuit by penetrating through the wire outlet hole; the data acquisition circuit is fixed on the inner side of the end cover.
Further, a sealing ring is arranged between the sealing cavity and the sealing cover plate.
Further, a sealing ring is arranged between the end cover and the shell.
Further, the second fixing pad comprises a first part and a second part, the first part is filled in the middle of the shell, and the second part is arranged close to the end cover; the second arc-shaped groove is arranged on the first part; the second portion has a central cavity dimension that is greater than the central cavity dimension of the first portion.
Further, tin sheets are arranged on the outer surface of the spherical detector in equal gaps.
Further, a temperature sensor and a humidity sensor are arranged on the inner side of the end cover.
Further, a foldable handle is arranged on the end cover.
Further, an indicator light is arranged on the end cover.
Further, the shell and the end cover are made of aluminum alloy materials; and/or the number of the groups of groups,
the spherical detector is made of stainless steel or aluminum alloy; or/and the like, or/and,
the inert gas is argon; and/or the number of the groups of groups,
the fixing pad is made of nonmetal foam.
Compared with the prior art, the utility model has the following technical effects:
according to the high-pressure ionization chamber radiation monitor, the vibration resistance of the high-pressure ionization chamber radiation monitor is improved by filling the fixing gaskets among the shell, the end cover and the spherical detector, the interference of vibration on the circuit signal transmission device is reduced, and the accuracy of the monitoring result of the high-pressure ionization chamber radiation monitor is improved.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a radiation monitor for a high-pressure ionization chamber according to an embodiment of the present utility model;
FIG. 2 is a schematic diagram of the sphere detector of FIG. 1;
fig. 3 is a schematic view of the end cap of fig. 1.
Wherein, each reference sign in the figure:
1. the device comprises a shell, 2, a first fixing gasket, 3, a second fixing gasket, 4, a spherical detector, 5, a metal rod, 6, an end cover, 7, a sealing cavity, 8, a sealing cover plate, 9, a front-end analog amplifying circuit, 10, a data acquisition circuit, 11, a transmission line, 12, a tin sheet, 301, a first part, 302, a second part, 601, a communication interface, 602, a power interface, 603, a power switch, 604, a handle, 605 and an indicator lamp.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the utility model is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.
It will be understood that when an element is referred to as being "mounted" or "disposed" on another element, it can be directly on the other element or be indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.
It is to be understood that the terms "length," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, and are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.
Furthermore, the terms "first," second, "" third, "" fourth, "and fifth" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying a number of technical features being indicated. Thus, a feature defining "first", "second", "third", "fourth", "fifth" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
Referring to fig. 1 to 3, a radiation monitor for a high-pressure ionization chamber according to an embodiment of the present utility model will be described.
In one embodiment of the utility model, the high-pressure ionization chamber radiation monitor comprises a shell 1, a fixed liner, a spherical detector 4, a metal rod 5, a circuit signal transmission device and an end cover 6, wherein the fixed liner is filled in the shell 1 and comprises a first fixed liner 2 and a second fixed liner 3, the first fixed liner 2 is filled at the end part of the shell 1, and the first fixed liner 2 is provided with a first arc-shaped groove; the second fixing gasket 3 is adjacent to the first fixing gasket 2, a cavity is formed in the middle of the second fixing gasket 3, and a second arc-shaped groove is formed in one end, close to the first fixing gasket 2, of the second fixing gasket 3; the spherical detector 4 is fixed in the first arc-shaped groove and the second arc-shaped groove, and the outer surface of the spherical detector 4 is abutted with the inner walls of the first arc-shaped groove and the second arc-shaped groove; the spherical detector 4 is filled with inert gas; one end of the metal rod 5 is arranged at the sphere center of the spherical detector 4, and the other end extends out of the outer surface of the spherical detector 4; the circuit signal transmission device is arranged in the cavity and is electrically connected with one end of the metal rod 5 extending out of the outer surface of the spherical detector 4 through a transmission line; the end cover 6 is covered on the shell 1; the end cover 6 is provided with a communication interface 601, a power interface 602 and a power switch 603 which are communicated with the circuit signal transmission device. The power interface 602 is used for switching on the circuit signal transmission device, the power switch 603 controls the power on/off, the communication interface 601 is used for transmitting the electric signal of the circuit signal transmission device to the PC, and the communication interface 601 and the PC adopt 485 communication modules.
The shell 1 of the embodiment of the utility model adopts the aluminum alloy material, and the mechanical strength of the aluminum alloy is higher, so that the radiation can not be blocked from passing through, and the detection performance can not be influenced.
The end cover 6 of the embodiment of the utility model is also made of aluminum alloy material and is fastened and assembled with the shell 1 through screws. A sealing ring is arranged between the end cover 6 and the shell 1, so that the inner air tightness of the monitor is ensured, and meanwhile, the end cover 6 and the shell 1 are ensured to be good in electric conduction. The humidity inside the monitor can also be controlled at a stable level.
The spherical detector 4 of the embodiment of the utility model is made of stainless steel or aluminum alloy material and is used as a high-voltage electrode, and high voltage of-400 to-800V is applied to the high-voltage electrode. The inner metal rod 5 acts as a collector, on which the voltage is close to ground. One end of the metal rod 5 extends out of the sphere and is connected with the circuit signal transmission device. One end of the metal rod 5 may be spherical and arranged concentrically with the spherical detector 4. The inert gas in the sphere detector 4 may be argon gas at a pressure of 25 atmospheres.
The fixing pad of the embodiment of the utility model is made of non-metal foam, has certain hardness and elasticity, and has higher insulation coefficient. The outer diameter of the fixed gasket is the same as the inner diameter of the shell 1, and the total filling height is the same as the depth of the inner cavity of the shell 1. Wherein, the lower side of the first fixed liner 2 and the upper side of the second fixed liner 3 are respectively provided with a hemispherical cavity groove, the radius of the hemispherical cavity groove is the same as that of the spherical detector 4, and the spherical detector 4 can be just placed in the spherical cavity formed after the first fixed liner 2 and the second fixed liner 3 are spliced.
According to the high-pressure ionization chamber radiation monitor, the vibration resistance of the high-pressure ionization chamber radiation monitor is improved by filling the fixing gaskets among the shell 1, the end cover 6 and the spherical detector 4, the interference of vibration on the circuit signal transmission device is reduced, and the accuracy of the monitoring result of the high-pressure ionization chamber radiation monitor is improved.
Further, the high-pressure ionization chamber radiation monitor of the embodiment of the utility model further comprises a sealing cavity 7 and a sealing cover plate 8; the circuit signal transmission device comprises a front-end analog amplifying circuit 9 and a data acquisition circuit 10; one end of the sealing cavity 7 is connected to the outer surface of the spherical detector 4, the other end of the sealing cavity is sealed by a sealing cover plate 8, the front-end analog amplifying circuit 9 is electrically connected with one end of the metal rod 5 extending out of the outer surface of the spherical detector 4 through a transmission line, and the front-end analog amplifying circuit 9 is fixed in the sealing cavity 7; the sealing cover plate 6 is provided with a wire outlet hole, and a transmission wire 11 of the data acquisition circuit 10 is electrically connected with the front-end analog amplifying circuit 9 by penetrating through the wire outlet hole; the data acquisition circuit 10 is fixed inside the end cap 6.
As shown in fig. 1 and 2, the front-end analog amplifying circuit 9 is placed inside the cylindrical sealed cavity 7 and locked by a screw. The opening of the cylindrical sealing cavity 7 is covered by a circular metal sealing cover plate 8. A sealing ring is further arranged between the circular metal sealing cover plate 8 and the cylindrical sealing cavity 7, the electric conduction is good, and a wire outlet hole is reserved on the circular metal sealing cover plate 8. A cable transmission line 11 between the front-end analog amplifying circuit 9 and the data acquisition circuit 10 passes through the wire outlet hole. The sealing cavity 7 can be made of steel, and the sealing cavity 7 and the metal rod 5 are coaxially arranged.
The front-end analog amplifying circuit 9 can be sealed in the cavity of the sealed cavity 7 by arranging the sealed cavity 7 and the sealed cover plate 8, so that the influence of external moisture on the front-end analog amplifying circuit 9 is avoided, and the signal to noise ratio of the front-end analog amplifying circuit 9 can be influenced because leakage current can be introduced due to the fact that the humidity is larger.
Further, the second fixing pad 3 of the embodiment of the present utility model includes a first portion 301 and a second portion 302, the first portion 301 is filled in the middle of the housing 1, and the second portion 302 is disposed near the end cap 6; the second arcuate groove is provided on the first portion 301; the second portion 302 has a central cavity dimension that is larger than the central cavity dimension of the first portion 301, as shown in fig. 1, which may facilitate the installation of components such as circuit signal transmission devices.
Further, the outer surface of the spherical detector 4 of the embodiment of the utility model is provided with the tin sheet 12 in equal gaps, and the tin sheet 12 can supplement energy for the outer part of the spherical detector 4, so that the monitor can meet the monitoring requirement of low-energy rays, and the responsiveness of the monitor is improved.
Further, the inner side of the end cover 6 of the embodiment of the utility model is provided with a temperature sensor and a humidity sensor. The data acquisition circuit 10 synchronously acquires temperature and humidity data of the temperature sensor and the humidity sensor, and transmits the acquired temperature and humidity data information to the PC.
Further, the end cover 6 of the embodiment of the utility model is provided with a foldable handle 604, so that the monitor is convenient to carry.
Further, an indicator lamp 605 is arranged on the end cover 6 in the embodiment of the utility model, the indicator lamp 605 is electrically connected with the power interface, and the indicator lamp 605 is used for indicating whether the monitor is in a working state.
The foregoing examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.
Claims (10)
1. A high pressure ionization chamber radiation monitor comprising:
a housing;
a fixing pad filled in the case; the fixing gasket comprises a first fixing gasket and a second fixing gasket, the first fixing gasket is filled at the end part of the shell, and a first arc-shaped groove is formed in the first fixing gasket; the second fixing gasket is adjacent to the first fixing gasket, a cavity is formed in the middle of the second fixing gasket, and a second arc-shaped groove is formed in one end, close to the first fixing gasket, of the second fixing gasket;
the spherical detector is fixed in the first arc-shaped groove and the second arc-shaped groove, and the outer surface of the spherical detector is abutted with the inner walls of the first arc-shaped groove and the second arc-shaped groove; inert gas is filled in the spherical detector;
one end of the metal rod is arranged at the sphere center of the spherical detector, and the other end of the metal rod extends out of the outer surface of the spherical detector;
the circuit signal transmission device is arranged in the cavity and is electrically connected with one end of the metal rod extending out of the outer surface of the spherical detector through a transmission line; the method comprises the steps of,
an end cover, which is covered on the shell; and the end cover is provided with a communication interface, a power interface and a power switch which are communicated with the circuit signal transmission device.
2. The high pressure ionization chamber radiation monitor of claim 1, further comprising a sealed chamber and a sealed cover plate; the circuit signal transmission device comprises a front-end analog amplifying circuit and a data acquisition circuit; one end of the sealing cavity is connected to the outer surface of the spherical detector, the other end of the sealing cavity is sealed by the sealing cover plate, the front-end analog amplifying circuit is electrically connected with one end, extending out of the outer surface of the spherical detector, of the metal rod through a transmission line, and the front-end analog amplifying circuit is fixed in the sealing cavity;
the sealing cover plate is provided with a wire outlet hole, and a transmission wire of the data acquisition circuit is electrically connected with the front-end analog amplifying circuit by penetrating through the wire outlet hole; the data acquisition circuit is fixed on the inner side of the end cover.
3. The apparatus of claim 2, wherein a seal is provided between the seal chamber and the seal cover.
4. A high pressure ionization chamber radiation monitor according to claim 3 wherein a seal ring is disposed between said end cap and said housing.
5. The high pressure ionization chamber radiation monitor of claim 1 wherein said second mounting pad comprises a first portion and a second portion, said first portion being filled in the middle of said housing, said second portion being disposed adjacent said end cap; the second arc-shaped groove is arranged on the first part; the second portion has a central cavity dimension that is greater than the central cavity dimension of the first portion.
6. A high pressure ionization chamber radiation monitor according to claim 1 wherein the spherical detector has tin plates disposed on the outer surface thereof in equidistant gaps.
7. The high pressure ionization chamber radiation monitor of claim 1, wherein a temperature sensor and a humidity sensor are disposed inside said end cap.
8. A high pressure ionization chamber radiation monitor according to claim 1 wherein said end cap is provided with a foldable handle.
9. The apparatus of claim 1, wherein said end cap is provided with an indicator light.
10. The high pressure ionization chamber radiation monitor of any one of claims 1-9, wherein said housing and said end cap are aluminum alloy materials; and/or the number of the groups of groups,
the spherical detector is made of stainless steel or aluminum alloy; or/and the like, or/and,
the inert gas is argon; and/or the number of the groups of groups,
the fixing pad is made of nonmetal foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321269711.XU CN219978539U (en) | 2023-05-23 | 2023-05-23 | High-pressure ionization chamber radiation monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321269711.XU CN219978539U (en) | 2023-05-23 | 2023-05-23 | High-pressure ionization chamber radiation monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219978539U true CN219978539U (en) | 2023-11-07 |
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ID=88578411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321269711.XU Active CN219978539U (en) | 2023-05-23 | 2023-05-23 | High-pressure ionization chamber radiation monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219978539U (en) |
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2023
- 2023-05-23 CN CN202321269711.XU patent/CN219978539U/en active Active
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