CN216561018U - Detector with built-in deionizer for tritium measuring ionization chamber - Google Patents
Detector with built-in deionizer for tritium measuring ionization chamber Download PDFInfo
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- CN216561018U CN216561018U CN202120654396.7U CN202120654396U CN216561018U CN 216561018 U CN216561018 U CN 216561018U CN 202120654396 U CN202120654396 U CN 202120654396U CN 216561018 U CN216561018 U CN 216561018U
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Abstract
The utility model belongs to the technical field of environmental monitoring, and particularly relates to a detector with a built-in deionizer for measuring tritium in an ionization chamber, which comprises a gas flow type net wall tritium measuring outer ionization chamber (12), a coaxial gamma compensation inner ionization chamber (11) with the same effective volume as that of the gas flow type net wall tritium measuring outer ionization chamber (12), and a deionizer (5) arranged at the top of the inner side of the gas flow type net wall tritium measuring outer ionization chamber (12). According to the utility model, high voltages with opposite polarities are applied to the high-voltage electrode of the gamma compensation ionization chamber and the high-voltage electrode of the outer cylinder of the tritium detection ionization chamber, so that the current generated by gamma rays is compensated, and the sensitivity of tritium monitoring is improved; the tritium monitoring instrument is placed in an ionization chamber in a deionization device, and the circuit and the gas circuit are greatly simplified under the condition of volume, so that the tritium monitoring instrument is convenient to install, use and maintain.
Description
Technical Field
The utility model belongs to the technical field of environmental monitoring, and particularly relates to a detector with a built-in deionizer for measuring tritium in an ionization chamber.
Background
A gas-flowing type ionization chamber is widely used as a detector of radioactive gas tritium in an air tritium monitor used in radiation protection or health-care physical monitoring. As the ionization chamber also responds to gamma radioactivity, in order to eliminate the influence of background gamma rays of an environment or a measuring place on the tritium monitor and improve the sensitivity of the tritium monitor, the gas flow type ionization chambers used by the common tritium monitor are made into a form of symmetrical compensation or coaxial compensation ionization chambers, wherein the coaxial compensation ionization chambers are generally adopted due to better angular response. However, during installation and use of the tritium monitoring instrument, an ion eliminator needs to be externally connected to trap and eliminate free ions in the air so as to eliminate the interference of tritium measurement in the air. This can cause some complications and inconvenience in the installation, use and maintenance of the tritium monitor in the circuitry and circuits.
Disclosure of Invention
In order to overcome the defects in the prior art, the utility model provides the detector for the tritium measuring ionization chamber with the built-in deionizer, the deionizer of the tritium monitor is placed in the ionization chamber, the circuit and the gas circuit can be greatly simplified, and the tritium monitor is convenient to install, use and maintain.
In order to achieve the above purpose, the utility model adopts a technical scheme that:
a detector with a built-in deionizer for measuring tritium in an ionization chamber comprises a gas flow type mesh wall tritium measuring outer ionization chamber, a coaxial gamma compensation inner ionization chamber with the same effective volume as the gas flow type mesh wall tritium measuring outer ionization chamber, and a deionizer arranged at the top of the inner side of the gas flow type mesh wall tritium measuring outer ionization chamber,
the gas flow type mesh wall tritium measuring outer ionization chamber comprises a tritium measuring ionization chamber outer cylinder, a gamma compensation ionization chamber outer cylinder and a mesh wall fixed on a stainless steel support rod;
the coaxial gamma compensation inner ionization chamber comprises a gamma compensation ionization chamber outer cylinder and a gamma compensation ionization chamber high-voltage electrode which is arranged in the center of the coaxial gamma compensation inner ionization chamber.
Furthermore, as the detector for the tritium measuring ionization chamber with the built-in deionizer, an air outlet nozzle is arranged at the top of the outer cylinder of the tritium measuring ionization chamber, and an air inlet nozzle is arranged at the bottom of the side wall.
Furthermore, as above the detector for tritium measuring ionization chamber with built-in deionizer, the outer surface of the stainless steel support rod is covered with insulating material, the number of the stainless steel support rod is at least 3, and the collector of the deionizer is fixedly connected with the bottom plate at the bottom of the outer cylinder of the tritium measuring ionization chamber through the stainless steel support rod.
Furthermore, according to the detector for the tritium measuring ionization chamber with the built-in deionizer, a current collecting plug for outputting a current signal is arranged on the bottom plate, one end of the current collecting plug is electrically connected with the outer cylinder of the gamma compensation ionization chamber, and the other end of the current collecting plug is connected with the input end of the front stage of an external electrometer.
Furthermore, the detector with the built-in deionizer for the tritium-measuring ionization chamber is a mesh deionizer lined by an insulator.
Furthermore, according to the detector for the tritium measuring ionization chamber with the built-in deionizer, the lower end of the high-voltage electrode of the gamma compensation ionization chamber is fixed in the insulator, the insulator is arranged in the protection ring, and the protection ring is fixedly connected with the outer cylinder of the gamma compensation ionization chamber through fastening screws.
Furthermore, the detector with the built-in deionizer for the tritium measuring ionization chamber is characterized in that the bottom of the outer cylinder of the tritium measuring ionization chamber is fixed on the bottom plate through fastening screws.
Furthermore, the detector with the built-in deionizer for measuring tritium in the ionization chamber is characterized in that the outer cylinder of the gamma compensation ionization chamber is made of alloy aluminum.
Furthermore, the detector with the built-in deionizer for the tritium measurement ionization chamber is characterized in that the tritium measurement ionization chamber outer cylinder, the gamma compensation ionization chamber outer cylinder and the gamma compensation ionization chamber high-voltage electrode are isolated and coaxially connected by an insulating material.
Furthermore, the detector with the built-in deionizer for tritium measurement in the ionization chamber is characterized in that the insulating material is polytetrafluoroethylene.
The utility model has the following beneficial effects:
1. according to the detector for the tritium measurement ionization chamber, the outer cylinder of the tritium measurement ionization chamber is directly used as a high-voltage electrode, and high voltages with opposite polarities are applied to the high-voltage electrode of the gamma compensation ionization chamber and the high-voltage electrode of the outer cylinder of the tritium measurement ionization chamber, so that the current generated by gamma rays is effectively compensated, and the sensitivity of tritium monitoring is improved;
2. the tritium monitoring instrument is arranged in the deionization device of the tritium monitoring instrument in the ionization chamber, the volume is small, the circuit and the gas circuit are greatly simplified, and the tritium monitoring instrument is convenient to install, use and maintain.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of a detector with a built-in deionizer for tritium measurement in an ionization chamber.
Wherein, 1-tritium detection ionization chamber outer cylinder; 2-gamma compensation ionization chamber outer cylinder; 3-stainless steel support rods; 4-gamma compensation ionization chamber high voltage electrode; 5-deionization equipment; 6-an insulator; 7-a guard ring; 8-collecting current plug; 9-an air outlet nozzle; 10-an air inlet nozzle; 11-coaxial gamma compensated inner ionization chamber; 12-gas flow type outer tritium measuring ionization chamber with a net wall; 13-a base plate; 14-web wall.
Detailed Description
The utility model is further described with reference to specific embodiments and drawings attached to the description.
Fig. 1 shows a schematic structural diagram of an embodiment of a detector with a built-in deionizer for tritium measurement in the present invention, and it can be seen from the diagram that the device mainly includes a gas flow type mesh wall tritium measurement outer ionization chamber (12), a coaxial gamma compensation inner ionization chamber (11), and a deionizer (5) disposed at the top of the inner side of the gas flow type mesh wall tritium measurement outer ionization chamber (12), wherein the effective volumes of the coaxial gamma compensation inner ionization chamber (11) and the gas flow type mesh wall tritium measurement outer ionization chamber (12) are the same.
The gas flow type net wall tritium measuring outer ionization chamber (12) consists of a tritium measuring ionization chamber outer cylinder (1), a gamma compensation ionization chamber outer cylinder (2) and a net wall (14) fixed on a stainless steel support rod (3); the coaxial gamma compensation inner ionization chamber (11) is composed of an aluminum alloy gamma compensation ionization chamber outer cylinder (2) and a gamma compensation ionization chamber high-voltage electrode (4) which is arranged in the center of the coaxial gamma compensation inner ionization chamber (11). In the embodiment, the tritium measuring ionization chamber outer cylinder (1) is directly used as a high-voltage electrode, and high voltages with opposite polarities are applied to the high-voltage electrode (4) of the gamma compensation ionization chamber and the high-voltage electrode of the tritium measuring ionization chamber outer cylinder (1), so that the current generated by gamma rays is compensated, and the sensitivity of tritium monitoring is improved.
The deionization device (5) is arranged at the top of the inner side of the tritium measuring outer ionization chamber (12) of the gas flow type net wall, and the lower end of the deionization device (5) fixedly connects a collector of the deionization device (5) with a bottom plate (13) positioned at the bottom of the tritium measuring ionization chamber outer cylinder (1) through three stainless steel support rods (3) wrapped with insulating materials. The deionizer (5) is a mesh type deionizer lined by an insulator. The deionization device of the tritium monitor is arranged in the ionization chamber, so that a circuit and a gas circuit are greatly simplified, and the tritium monitor is convenient to install, use and maintain.
An air outlet nozzle (9) is arranged at the top of the outer cylinder (1) of the tritium measuring ionization chamber, and an air inlet nozzle (10) is arranged at the bottom of the side wall.
A current collecting plug (8) is arranged on the bottom plate (13), one end of the current collecting plug (8) is electrically connected with the gamma compensation ionization chamber outer cylinder (2), the other end of the current collecting plug is connected to the input end of the external electrometer front stage, and a current signal is output from the gamma compensation ionization chamber outer cylinder (2) through the current collecting plug (8).
The bottom of the outer cylinder (1) of the tritium measuring ionization chamber is fixed on the bottom plate (13) through fastening screws.
The tritium measuring ionization chamber outer cylinder (1), the gamma compensation ionization chamber outer cylinder (2) and the gamma compensation ionization chamber high-voltage electrode (4) are isolated and coaxially connected by an insulating material.
The lower end of a gamma compensation ionization chamber high-voltage electrode (4) is fixed in an insulator (6), the insulator (6) is arranged in a protection ring (7), and the protection ring (7) is fixedly connected with a gamma compensation ionization chamber outer cylinder (2) through a fastening screw.
Preferably, the insulating material in this embodiment is polytetrafluoroethylene.
The utility model provides a detector with a built-in deionizer for measuring tritium in an ionization chamber, wherein an outer cylinder (1) of the ionization chamber for measuring tritium is directly used as a high-voltage electrode, and high voltages with opposite polarities are added on the high-voltage electrode (4) of a gamma compensation ionization chamber and the high-voltage electrode of the outer cylinder (1) for measuring tritium, so that the current generated by gamma rays is compensated, and the sensitivity of tritium monitoring is improved; the deionization device of the tritium monitor is arranged in the ionization chamber, so that a circuit and a gas circuit are greatly simplified, and the tritium monitor is convenient to install, use and maintain.
The above-described embodiments are merely illustrative of the present invention, which may be embodied in other specific forms or in other specific forms without departing from the spirit or essential characteristics thereof. The described embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the utility model should be indicated by the appended claims, and any changes that are equivalent to the intent and scope of the claims should be construed to be included therein.
Claims (10)
1. A detector with a built-in deionizer for measuring tritium in an ionization chamber is characterized by comprising a gas flow type mesh wall tritium measuring outer ionization chamber (12), a coaxial gamma compensation inner ionization chamber (11) with the same effective volume as the gas flow type mesh wall tritium measuring outer ionization chamber (12), and a deionizer (5) arranged at the top of the inner side of the gas flow type mesh wall tritium measuring outer ionization chamber (12),
the gas flow type mesh wall tritium measuring outer ionization chamber (12) comprises a tritium measuring ionization chamber outer cylinder (1), a gamma compensation ionization chamber outer cylinder (2) and a mesh wall (14) fixed on a stainless steel support rod (3);
the coaxial gamma compensation inner ionization chamber (11) comprises a gamma compensation ionization chamber outer cylinder (2) and a gamma compensation ionization chamber high-voltage electrode (4) which is arranged in the center of the coaxial gamma compensation inner ionization chamber (11).
2. The detector for the tritium measurement ionization chamber with the built-in deionizer according to claim 1, characterized in that an air outlet nozzle (9) is arranged at the top of an outer cylinder (1) of the tritium measurement ionization chamber, and an air inlet nozzle (10) is arranged at the bottom of a side wall.
3. The detector as claimed in claim 2, wherein the external surface of the stainless steel support rod (3) is covered with at least three insulating materials, and the collector of the deionizer (5) is fixedly connected with the bottom plate (13) at the bottom of the tritium measuring ionization chamber outer cylinder (1) through the stainless steel support rod (3).
4. The detector for the tritium measurement ionization chamber with the built-in deionizer according to claim 3, characterized in that a current collecting plug (8) for outputting a current signal is arranged on the bottom plate (13), one end of the current collecting plug (8) is electrically connected with the outer cylinder (2) of the gamma compensation ionization chamber, and the other end is connected to an input end of a front stage of an external electrometer.
5. The detector as claimed in claim 4, wherein the deionizer (5) is a mesh type deionizer lined with an insulator.
6. The detector for the tritium measurement ionization chamber with the built-in deionizer according to claim 5, characterized in that the lower end of the gamma compensation ionization chamber high-voltage electrode (4) is fixed in an insulator (6), the insulator (6) is arranged in a protection ring (7), and the protection ring (7) is fixedly connected with the gamma compensation ionization chamber outer cylinder (2) through a fastening screw.
7. The detector for the tritium measurement ionization chamber with the built-in deionizer according to claim 6, characterized in that the bottom of the outer cylinder (1) of the tritium measurement ionization chamber is fixed on the bottom plate (13) through fastening screws.
8. The detector for the tritium measurement ionization chamber with the built-in deionizer according to claim 7, characterized in that the material of the outer cylinder (2) of the gamma compensation ionization chamber is aluminum alloy.
9. The detector for the tritium measurement ionization chamber with the built-in deionizer according to claim 8, characterized in that the tritium measurement ionization chamber outer cylinder (1), the gamma compensation ionization chamber outer cylinder (2) and the gamma compensation ionization chamber high voltage electrode (4) are coaxially connected by insulation materials in an isolated manner.
10. The detector of claim 9, wherein the insulating material is polytetrafluoroethylene.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120654396.7U CN216561018U (en) | 2021-03-31 | 2021-03-31 | Detector with built-in deionizer for tritium measuring ionization chamber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120654396.7U CN216561018U (en) | 2021-03-31 | 2021-03-31 | Detector with built-in deionizer for tritium measuring ionization chamber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216561018U true CN216561018U (en) | 2022-05-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120654396.7U Active CN216561018U (en) | 2021-03-31 | 2021-03-31 | Detector with built-in deionizer for tritium measuring ionization chamber |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216561018U (en) |
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2021
- 2021-03-31 CN CN202120654396.7U patent/CN216561018U/en active Active
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