阅读说明：本技术 一种自成靶中子管用含氚气体密封存储装置及安装方法 (Tritium-containing gas sealed storage device for self-target neutron tube and installation method ) 是由 徐强 杨莹 霍广文 王峰 董陈岗 彭程 王凯 唐浩 于 2021-03-31 设计创作，主要内容包括：一种自成靶中子管用含氚气体密封存储装置及安装方法,可用于存储、运输含放射性氚元素的气体,或将氚气充入包含空白靶的中子管,使该靶成为含氘氚元素的自成靶。解决了现有技术中,中子管生产厂家在常规实验室无法存储放射性氚气,或必须在有资质的实验室才能进行自成靶中子管生产的问题。该装置包括电极引线、下法兰、存储器、圆筒状外壳、上法兰、第一气管、真空阀、接口法兰以及第二气管；该装置具有结构简单、生产周期短、安全性好、体积小、重量轻、操作方便等优点。同时,本发明还提出了该装置的安装方法。(A sealed storage device for tritium-containing gas used for a self-targeting neutron tube and an installation method thereof can be used for storing and transporting gas containing radioactive tritium elements, or filling tritium gas into a neutron tube containing a blank target, so that the target becomes a self-targeting containing deuterium and tritium elements. The problem of in the prior art, neutron pipe manufacture factory can't store the radio tritium gas in conventional laboratory, or must carry out the production of target neutron pipe in oneself in qualified laboratory is solved. The device comprises an electrode lead, a lower flange, a storage, a cylindrical shell, an upper flange, a first air pipe, a vacuum valve, an interface flange and a second air pipe; the device has the advantages of simple structure, short production period, good safety, small volume, light weight, convenient operation and the like. Meanwhile, the invention also provides an installation method of the device.)

1. A sealed storage device for tritium-containing gas for a self-target neutron tube is characterized in that: the device comprises a lower flange (2), a storage (3), a cylindrical shell (4), an upper flange (5), a first air pipe (6), a vacuum valve (7), an interface flange (8), a second air pipe (9) and at least two electrode leads (1);

the upper flange (5) and the lower flange (2) are arranged at two ends of the cylindrical shell (4) to form a sealed cavity; a first air pipe (6) penetrates through the upper flange (5) from the sealing cavity and is connected with a vacuum valve (7);

the other end of the vacuum valve (7) is connected with a second air pipe (9); the other end of the second air pipe (9) is connected with the interface flange (8);

the storage (3) is fixed on the lower flange (2) in the sealed cavity through a connector (301) or/and a mounting bracket; the connector (301) is connected with the electrode lead (1), and the other end of the electrode lead (1) penetrates through the lower flange (2);

the first air pipe (6) is connected with the upper flange (5) in a sealing manner, and the electrode lead (1) is connected with the lower flange (2) in a sealing manner.

2. A tritium-containing gas sealed storage device for a self-targeted neutron tube according to claim 1, characterized in that:

a first circular through hole (10) is formed in the center of the upper flange (5), and a first annular groove (11) is formed in the bottom surface of the upper flange (5);

the lower flange (2) is provided with second circular through holes (12) with the same number as the electrode leads (1), and the top surface of the lower flange (2) is provided with a second annular groove (13);

the upper edge of the cylindrical shell (4) is hermetically embedded into the first annular groove (11);

the lower edge of the cylindrical shell (4) is hermetically embedded into the second annular groove (13);

the first air pipe (6) penetrates through the first circular through hole (10) and is connected with the upper flange (5) in a sealing mode;

the electrode lead (1) penetrates through the second circular through hole (12) and is connected with the lower flange (2) in a sealing and insulating mode.

3. A sealed storage device for a tritium-containing gas for a neutron tube in a self-targeting as recited in claim 2, wherein:

the first air pipe (6) and the second air pipe (9) are made of stainless steel materials and have the same outer diameter and size;

the inner diameter of the first air pipe (6) is not less than 1 mm;

the inner diameter of the second air pipe (9) is not less than 1 mm, and the length of the second air pipe is not more than 10 mm.

4. A tritium-containing gas sealed storage device for a self-targeted neutron tube according to claim 3, characterized in that:

the cylindrical shell (4) is made of stainless steel materials, the wall thickness is not less than 1 millimeter, or the pressure bearing capacity is not less than 1 standard atmospheric pressure.

5. A sealed storage device for tritium-containing gas for a neutron tube in a self-targeted manner as recited in any of claims 1 to 4, characterized in that: the cylindrical shell (4) is fixedly connected with the upper flange (5) and the lower flange (2) by argon arc welding; the upper flange (5) is fixedly connected with the first air pipe (6) in a welding mode.

6. A sealed storage device for tritium-containing gas for a self-targeted neutron tube as recited in claim 5, characterized in that: the interface flange (8) is a KF vacuum quick-connection flange, and the lower end of the KF vacuum quick-connection flange is fixedly connected with the second air pipe (9) in a welding mode.

7. A sealed storage device for tritium-containing gas for a self-targeted neutron tube as recited in claim 6, wherein: the memory (3) is made of an alloy material for adsorbing gaseous tritium at room temperature; the electrode lead (1) is a vacuum ceramic sealing lead; the vacuum valve (7) is a vacuum needle valve, and two ends of the vacuum valve are provided with metal sealing rings.

8. A sealed storage device for a tritium-containing gas for a neutron tube in a self-targeting as claimed in claim 7, wherein: the second circular through holes (12) are symmetrically distributed along the central line of the circular end surface of the lower flange (2).

9. A method of installing a sealed storage device for tritium-containing gas for a neutron tube in a self-targeted manner as set forth in claim 1, comprising the steps of:

step 1, passing an electrode lead (1) through a second circular through hole (12) on a lower flange (2), and hermetically and insulatively connecting the electrode lead and the lower flange (2);

step 2, fixing the memory (3) on a lower flange (2) in the sealed cavity through a connector (301) or/and a mounting bracket, and connecting the connector (301) at the lower end of the memory with the electrode lead (1); then, a first air pipe (6) penetrates through the first circular through hole (10) and is connected with the upper flange (5) in a sealing mode;

step 3, fixedly connecting the lower end face of the cylindrical shell (4) with the lower flange (2);

step 4, fixedly connecting the upper end face of the cylindrical shell (4) with an upper flange (5);

step 5, connecting one end of a vacuum valve (7) with a first air pipe (6), and connecting the other end of the vacuum valve with an interface flange (8) through a second air pipe (9);

and 6, communicating the interface flange (8) with a helium leak detector, opening the vacuum valve (7), performing air tightness test on each joint, closing the vacuum valve (7) after the air tightness test is qualified, and finishing the installation.

10. A method of installing a sealed storage device for a tritium-containing gas for a neutron tube in a self-targeted manner as recited in claim 9, characterized in that:

in the step 3, the lower end face of the cylindrical shell (4) is fixedly connected with the lower flange (2), specifically, the lower end face of the cylindrical shell (4) is embedded into a second annular groove (13) arranged on the top surface of the lower flange (2) and is fixedly connected with the lower flange (2);

in the step 4, the upper end face of the cylindrical shell (4) is fixedly connected with the upper flange (5), specifically, the upper end face of the cylindrical shell (4) is embedded into a first annular groove (11) arranged on the bottom face of the upper flange (5) and is fixedly connected with the upper flange (5).

Technical Field

The invention belongs to the technical field of neutron tube manufacturing, and particularly relates to a tritium-containing gas sealed storage device for a self-forming target neutron tube and an installation method thereof, which can be used for storing and transporting gas containing radioactive tritium elements or used for a production process of filling tritium gas into a blank target to change the blank target into a self-forming target containing deuterium and tritium elements.

Background

The neutron tube is a small accelerator neutron source, is composed of an ion source, an accelerating system, a target and an air pressure regulating system, and is mainly used in the fields of oil exploration, uranium ore exploration and the like. The neutron tube can be divided into a commodity target neutron tube and a self-forming target neutron tube, the commodity target neutron tube is a finished product target which stores tritium element gas, the self-forming target neutron tube is characterized in that deuterium and tritium mixed gas is filled into the neutron tube, the gas is ionized by an ion source of the neutron tube, deuterium and tritium ions are bombarded onto the target by an accelerating device, and the deuterium and tritium elements are injected into a blank target to be changed into the self-forming target containing the deuterium and tritium elements. The self-target neutron tube has the characteristics of good stability, long service life and the like, and the service life of the self-target neutron tube can reach more than 3 times of that of a commercial target neutron tube. In the prior art, the requirement on a tritium gas storage place and a tritium charging operation system is very high, and the tritium charging operation system and the tritium monitoring and measuring system are high in price, so that a conventional laboratory cannot store radioactive tritium gas, and a general neutron tube production enterprise neither has related radiation safety qualifications nor is willing to purchase expensive equipment, so that only a single commercial target neutron tube can be produced, and the production and market requirements of a self-targeting neutron tube cannot be met.

Disclosure of Invention

The invention provides a sealed storage device for a tritium-containing gas for a self-targeting neutron tube and an installation method, aiming at solving the problems that a conventional laboratory can not store radioactive tritium gas and can only carry out the production of the self-targeting neutron tube in qualified neutron tube production enterprises in the prior art, and the sealed storage device can be used for storing and transporting gas containing radioactive tritium elements or used for the production process of changing blank targets into self-targeting targets containing deuterium tritium elements.

The technical solution of the invention is as follows:

a sealed storage device for tritium-containing gas for a self-target neutron tube is characterized in that: the electrode lead wire device comprises a lower flange 2, a storage 3, a cylindrical shell 4, an upper flange 5, a first air pipe 6, a vacuum valve 7, an interface flange 8, a second air pipe 9 and at least two electrode lead wires 1;

the upper flange 5 and the lower flange 2 are arranged at two ends of the cylindrical shell 4 to form a sealed cavity; a first air pipe 6 passes through the upper flange 5 from the sealed cavity and is connected with a vacuum valve 7;

the other end of the vacuum valve 7 is connected with a second air pipe 9; the other end of the second air pipe 9 is connected with the interface flange 8;

the storage 3 is fixed on the lower flange 2 in the sealed cavity through a connector 301 or/and a mounting bracket; the connector 301 is connected with the electrode lead 1, and the other end of the electrode lead 1 penetrates through the lower flange 2;

the first air pipe 6 is connected with the upper flange 5 in a sealing way, and the electrode lead 1 is connected with the lower flange 2 in a sealing way.

Furthermore, a first circular through hole 10 is formed in the center of the upper flange 5, and a first annular groove 11 is formed in the bottom surface of the upper flange 5;

the lower flange 2 is provided with second circular through holes 12 the number of which is consistent with that of the electrode leads 1, and the top surface of the lower flange 2 is provided with a second annular groove 13; the upper edge of the cylindrical shell 4 is hermetically embedded in the first annular groove 11;

the lower edge of the cylindrical shell 4 is hermetically embedded in the second annular groove 13;

the first air pipe 6 penetrates through the first circular through hole 10 and is connected with the upper flange 5 in a sealing mode;

the electrode lead 1 passes through the second circular through hole 12 and is connected with the lower flange 2 in a sealing and insulating way.

Further, the first air pipe 6 and the second air pipe 9 are made of stainless steel materials and have the same outer diameter;

the inner diameter of the first air pipe 6 is not less than 1 mm;

the second air tube 9 has an inner diameter of not less than 1 mm and a length of not more than 10 mm.

Further, the cylindrical shell 4 is made of stainless steel material, the wall thickness is not less than 1 mm, or the pressure bearing capacity is not less than 1 standard atmospheric pressure.

Further, the cylindrical shell 4 is fixedly connected with the upper flange 5 and the lower flange 2 by argon arc welding; the upper flange 5 and the first air pipe 6 are fixedly connected in a welding mode.

Further, the interface flange 8 is a KF vacuum quick-connection flange, and the lower end of the KF vacuum quick-connection flange is fixedly connected with the second air pipe 9 in a welding mode.

Further, the memory 3 is an alloy material that adsorbs gaseous tritium at room temperature; the electrode lead 1 is a vacuum ceramic sealing lead; the vacuum valve 7 is a vacuum needle valve, and two ends are provided with metal sealing rings.

Further, the second circular through holes 12 are symmetrically distributed along the center line of the circular end surface of the lower flange 2.

Meanwhile, the invention also provides an installation method of the tritium-containing gas sealing storage device for the self-targeted neutron tube, which comprises the following steps:

step 1, passing an electrode lead 1 through a second circular through hole 12 on a lower flange 2, and hermetically and insulatingly connecting the electrode lead with the lower flange 2;

step 2, fixing the memory 3 on a lower flange 2 in the sealed cavity through a connector 301 or/and a mounting bracket, and connecting the connector 301 at the lower end of the memory with the electrode lead 1; then, the first air pipe 6 penetrates through the first circular through hole 10 and is connected with the upper flange 5 in a sealing mode;

step 3, fixedly connecting the lower end face of the cylindrical shell 4 with the lower flange 2;

step 4, fixedly connecting the upper end face of the cylindrical shell 4 with an upper flange 5;

step 5, connecting one end of a vacuum valve 7 with a first air pipe 6, and connecting the other end of the vacuum valve with an interface flange 8 through a second air pipe 9;

and 6, communicating the interface flange 8 with a helium leak detector, opening the vacuum valve 7, performing air tightness test on each joint, closing the vacuum valve 7 after the air tightness test is qualified, and completing installation.

Further, in step 3, the lower end surface of the cylindrical shell 4 is fixedly connected with the lower flange 2, specifically, the lower end surface of the cylindrical shell 4 is embedded into a second annular groove 13 arranged on the top surface of the lower flange 2 and is fixedly connected with the lower flange 2;

in step 4, the upper end surface of the cylindrical shell 4 is fixedly connected with the upper flange 5, specifically, the upper end surface of the cylindrical shell 4 is embedded into the first annular groove 11 arranged on the bottom surface of the upper flange 5 and is fixedly connected with the upper flange 5.

Compared with the prior art, the invention has the following beneficial effects:

1) the sealed storage device for the tritium-containing gas for the self-targeting neutron tube can finish storage and transportation of gaseous tritium gas in an enterprise for manufacturing the self-targeting neutron tube, or change a blank target filled with radioactive tritium gas into the neutron tube into the self-targeting tritium-containing self-targeting tritium without establishing an expensive safety laboratory, thereby greatly reducing the production cost of the enterprise.

2) The tritium-containing gas sealing storage device for the self-targeting neutron tube has high sealing performance and high transportation safety, improves the production efficiency of the self-targeting neutron tube, and meets the increasing demands of the market on the self-targeting neutron tube.

3) The tritium-containing gas sealing storage device for the self-targeted neutron tube has the advantages of simple structure, good safety, small volume, light weight, convenience in operation and low maintenance and use cost, and improves the product competitiveness of neutron tube production enterprises.

4) The tritium-containing gas sealed storage device for the self-target neutron tube is low in manufacturing cost, safe and environment-friendly, reusable components are selected to the maximum extent, and the use and production cost is further reduced.

5) The installation method of the sealed storage device for the tritium-containing gas for the self-targeting neutron tube effectively reduces the production and use cost of the self-targeting neutron tube, is safe and reliable, and improves the manufacturing efficiency of the self-targeting neutron tube.

Drawings

FIG. 1 is a schematic structural diagram of a tritium-containing gas sealed storage device for a self-targeted neutron tube according to the invention;

FIG. 2 is a schematic view of the cylindrical housing of the present invention;

FIG. 3 is a schematic view of the upper flange structure of the present invention;

FIG. 4 is a schematic view of the construction of the lower flange of the present invention;

description of reference numerals: 1-electrode lead, 2-lower flange, 3-storage, 301-connector, 4-cylindrical shell, 5-upper flange, 6-first air pipe, 7-vacuum valve, 8-interface flange, 9-second air pipe, 10-first circular through hole, 11-first annular groove, 12-second circular through hole, and 13-second annular groove.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings.

The tritium-containing gas sealed storage device for the neutron tube of the self-target provided by the embodiment comprises an electrode lead 1, a lower flange 2, a storage 3, a cylindrical shell 4, an upper flange 5, a first gas tube 6, a vacuum valve 7, an interface flange 8 and a second gas tube 9 as shown in fig. 1.

An upper flange 5 and a lower flange 2 are arranged at two ends of the cylindrical shell 4 to form a sealed cavity; the first air pipe 6 passes through a first circular through hole 10 on the upper flange 5 from the sealing cavity and is connected with the vacuum valve 7; one end of a second air pipe 9 is connected with the vacuum valve 7, the other end of the second air pipe is connected with an interface flange 8, and the interface flange 8 is a KF vacuum quick-connection flange; the storage 3 is fixed on the lower flange 2 in the sealed cavity through a connector 301, and in other embodiments, the storage can also be fixed on the lower flange 2 in the sealed cavity through a mounting bracket; a connector 301 at the lower end of the storage 3 is connected with one end of an electrode lead 1, and the other end of the electrode lead 1 passes through a second circular through hole 12 on the lower flange 2 and extends out of the sealed cavity; the first air pipe 6 and the second air pipe 9 are made of stainless steel materials and have the same outer diameter and size; the inner diameter of the first air pipe 6 is not less than 1 mm; the inner diameter of the second air pipe 9 is not less than 1 mm, and the length is not more than 10 mm; the cylindrical shell 4 is made of stainless steel material, the wall thickness is not less than 1 mm, or the pressure bearing capacity is not less than 1 standard atmospheric pressure.

As shown in fig. 2 and 3, a first circular through hole 10 and a first annular groove 11 are formed on the end surface of the upper flange 5; the first circular through hole 10 is positioned in the center of the upper flange 5; the first annular groove 11 is concentric with the circular end face of the upper flange 5; the upper end face of the cylindrical shell 4 is embedded into the first annular groove 11, so that the positioning and installation of the upper flange 5 and the cylindrical shell 4 in argon arc welding are realized, the welding quality and efficiency are improved, and the sealing performance of the welding position is ensured.

As shown in fig. 2 and 4, at least two second circular through holes 12 and second annular grooves 13 are formed on the end surface of the lower flange 2; the second circular through holes 12 are symmetrically distributed along the central line of the circular end surface of the lower flange 2; the second annular groove 13 is concentric with the circular end face of the lower flange 2; the lower end surface of the cylindrical shell 4 is embedded in the second annular groove 13, so that the positioning and installation of the lower flange 2 and the cylindrical shell 4 in argon arc welding are realized, the welding quality and efficiency are improved, and the sealing performance of the welding position is ensured.

The installation method of the sealed storage device for the tritium-containing gas for the self-targeted neutron tube comprises the following steps:

step 1, passing an electrode lead 1 through a second circular through hole 12 on a lower flange 2, and hermetically and insulatively connecting the electrode lead with the lower flange 2 to ensure the sealing reliability of the connection position; the number of the second circular through holes 12 is the same as the number of the electrode leads 1;

step 2, after the electrode lead 1 is hermetically and insulatively connected with the lower flange 2, fixing the memory 3 on the lower flange 2 in the sealed cavity through the connector 301 or/and the mounting bracket, and fixedly connecting the connector 301 at the lower end of the memory 3 with the electrode lead 1 in a soldering mode; then, the first air pipe 6 penetrates through a first circular through hole 10 positioned on the end face of the upper flange 5, and the first air pipe 6 is hermetically connected with the upper flange 5 so as to ensure the sealing reliability of the connection position;

step 3, embedding the lower end surface of the cylindrical shell 4 into a second annular groove 13 of the lower flange 2, and fixedly and hermetically connecting the lower flange 2 and the cylindrical shell 4 by argon arc welding; the second annular groove 13 plays a role in positioning the installation and welding of the lower flange 2, so that the welding quality and the welding efficiency are improved, and the sealing performance of the welding position is ensured;

step 4, after the cylindrical shell 4 and the lower flange 2 are welded, embedding the upper end surface of the cylindrical shell 4 into the first annular groove 11 on the upper flange 5, and fixedly and hermetically connecting the cylindrical shell 4 and the upper flange 5 together by adopting an argon arc welding mode, wherein the first annular groove 11 plays a positioning role in the installation and welding of the upper flange 5, so that the welding quality and efficiency are improved, and the sealing performance of the welding position is ensured;

step 5, connecting one end of a vacuum valve 7 with a first air pipe 6, and connecting the other end of the vacuum valve with an interface flange 8 through a second air pipe 9;

step 6, communicating an interface flange 8 on the sealed storage device with a helium leak detector, opening a vacuum valve 7, and carrying out air tightness test on each connection part; the helium leak detector vacuums the sealed storage device to 10^-5Pa, to detect whether there is leakage at each welding point and joint, to ensure the safety and reliability of the sealed storage device, and to close the vacuum valve 7 after detection; the manufacturing and installation processes of the self-target neutron tube are finished by a tritium-containing gas sealed storage device;

step 7, filling tritium-containing gas into the sealed storage device, connecting the sealed storage device with a gas filling device through an interface flange 8 in a test room with tritium filling qualification, opening a vacuum valve 7, and vacuumizing a gas filling pipeline to 10 by using a vacuum unit^-5Pa, and after ensuring that no leakage exists at the connection part, closing a connection valve with the vacuum pump. Connecting an electrode lead 1 of the sealed storage device to a direct-current power supply to control a storage device 3 to suck air and absorb tritium-containing gas in an air charging pipeline;

step 8, when the inflatable self-targeting neutron tube is required to be used, the self-targeting neutron tube prepared for inflation is connected with a sealed storage device through an interface flange 8, a vacuum valve 7 is opened, a storage in the self-targeting neutron tube is in an air suction state, an electrode lead 1 of the sealed storage device is connected with a direct current power supply, so that the storage 3 is controlled to deflate, and the function of inflating the self-targeting neutron tube is achieved;

and 9, after the inflation is finished, sealing the interface of the self-targeting neutron tube, closing the vacuum valve 7, disconnecting the self-targeting neutron tube from the sealed storage device, disconnecting the direct current power supply connected to the electrode lead 1, and finishing the inflation process.

The above disclosure is only for the specific embodiment of the present invention, but the embodiment of the present invention is not limited thereto, and any variations that can be made by those skilled in the art should fall within the scope of the present invention.