Anti-oxidation device for heat treatment of nuclear fuel storage container
By using anti-oxidation devices during the heat treatment of nuclear fuel storage containers and using nitrogen to balance the internal expansion pressure, the problem of container oxidation is solved, the difficulty of subsequent processing is reduced, and the working efficiency is improved.
Patent Information
- Application Number
- CN202411746641.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-03-04
AI Technical Summary
During the heat treatment of nuclear fuel storage containers, the container is prone to oxidation, which increases the difficulty of pickling and passivation of the inner surface of the container.
An anti-oxidation device is designed, including a heat treatment furnace, container bottle, airbag and pressure relief device. The airbag is filled with nitrogen and connected to the container bottle through the gas pipe to balance the internal expansion pressure and prevent oxidation.
It effectively reduces the oxidation in the container bottle, reduces the difficulty of subsequent pickling and passivation, facilitates operation, and improves work efficiency.
Smart Images
Figure CN119553064A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of heat treatment, and in particular relates to an anti-oxidation device for heat treatment of a nuclear fuel storage container. Background Art
[0002] At present, after welding, the containers used to store nuclear fuel must be heat treated as a whole to eliminate residual stress at the welds. However, during the heat treatment process, the containers for storing nuclear fuel are prone to oxidation, which increases the difficulty of subsequent pickling and passivation of the inner surface of the container. Therefore, an anti-oxidation device for heat treatment of nuclear fuel storage containers is needed to solve this problem. Summary of the invention
[0003] The object of the present invention is to provide an anti-oxidation device for heat treatment of a nuclear fuel storage container.
[0004] To achieve the above-mentioned purpose, the present invention provides an anti-oxidation device for heat treatment of nuclear fuel storage containers, including a heat treatment furnace, in which a container bottle is horizontally placed, a plug is provided on the left side of the container bottle, and a connector is provided on the right side of the container bottle; it also includes an air bag, the gas in the air bag is nitrogen, the air bag is connected to the connector on the container bottle through a gas pipe, a first valve is provided at the connection between the air bag and the gas pipe, and a pressure relief device is provided on the right side of the air bag.
[0005] Furthermore, the pressure relief device includes a pressure relief valve, and a second valve is provided between the pressure relief valve and the airbag.
[0006] Furthermore, a third valve is arranged above the airbag.
[0007] Furthermore, the container bottle is made of low alloy steel.
[0008] The advantages of the present invention are as follows: the present invention greatly reduces the oxidation situation in the container bottle, reduces the difficulty of subsequent pickling and passivation of the inner surface of the container bottle, is convenient for staff to operate, and improves work efficiency.
[0009] The present invention is described in detail below with reference to the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0010] Figure 1 It is a schematic diagram of the structure of the present invention.
[0011] Explanation of the accompanying drawings: 1. heat treatment furnace; 2. container bottle; 3. plug; 4. connector; 5. air bag; 6. gas pipe; 7. first valve; 8. pressure relief device; 81. pressure relief valve; 82. second valve; 9. third valve. DETAILED DESCRIPTION
[0012] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined purpose, the specific implementation methods, structural features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and embodiments.
[0013] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0014] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "aligned", "overlap", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0015] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present invention, unless otherwise specified, "plurality" means two or more.
[0016] Example 1
[0017] This embodiment provides Figure 1 An anti-oxidation device for heat treatment of a nuclear fuel storage container is shown, comprising a heat treatment furnace 1, in which a container bottle 2 is horizontally placed, the container bottle 2 is made of low alloy steel, a plug 3 is arranged on the left side of the container bottle 2, and a connector 4 is arranged on the right side of the container bottle 2; it also comprises an air bag 5, the air bag 5 is connected to the connector 4 on the container bottle 2 through a gas pipe 6, a first valve 7 is arranged at the connection between the air bag 5 and the gas pipe 6, wherein the gas in the air bag 5 is nitrogen, a third valve 9 is arranged above the air bag 5, and the arranged air bag is used to balance the effect of the expansion pressure of the heated gas inside the container bottle 2 to avoid the problem of cracking on the surface of the container bottle 2; at the same time, during the cooling process, the gas in the air bag can be replenished back to the inside of the tank.
[0018] Furthermore, a pressure relief device 8 is provided on the right side of the airbag 5 . The pressure relief device 8 includes a pressure relief valve 81 . A second valve 82 is provided between the pressure relief valve 81 and the airbag 5 .
[0019] When the container bottle 2 needs to be heat treated, one end of the container bottle 2 is first blocked with a plug 3, and the other end with a connector 4 is connected to the air bag 5 through an air pipe 6, wherein the air bag 5 is filled with nitrogen, which is an inert gas and has an anti-oxidation function, and has a low cost and little harm to the human body;
[0020] After the connection is completed, the first valve 7 is opened to allow the nitrogen in the airbag 5 to flow into the container bottle 2, and then the container bottle 2 is pushed into the heat treatment furnace 1, and then the heat treatment is started. When the nitrogen in the container bottle 2 expands due to heat and exceeds a certain pressure, the second valve 82 is opened, and the excess pressure is discharged through the pressure relief valve 81. When the container bottle 2 completes the heat treatment, the container bottle 2 is pushed out of the heat treatment furnace 1. After the container bottle 2 cools to room temperature, the third valve 9 is opened to release the pressure. The airbag is used to balance the expansion pressure of the heated gas inside the container bottle 2 to avoid cracking on the surface of the container bottle 2. At the same time, during the cooling process, the gas in the airbag can be replenished back to the inside of the tank body.
[0021] Finally, the plug 3 and the connector 4 are removed, and the container bottle 2 after the heat treatment is transferred to the next process, thereby greatly reducing the oxidation inside the container bottle 2, reducing the difficulty of subsequent pickling and passivation of the inner surface of the container bottle 2, and facilitating the operation of the staff, thereby improving work efficiency.
[0022] The above contents are further detailed descriptions of the present invention in combination with specific preferred embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. For ordinary technicians in the technical field to which the present invention belongs, several simple deductions or substitutions can be made without departing from the concept of the present invention, which should be regarded as falling within the protection scope of the present invention.
Claims
1. An anti-oxidation device for heat treatment of nuclear fuel storage containers, characterized in that: The invention comprises a heat treatment furnace (1), wherein a container bottle (2) is horizontally placed in the heat treatment furnace (1), a plug (3) is arranged on the left side of the container bottle (2), and a connector (4) is arranged on the right side of the container bottle (2); and an air bag (5), wherein the gas in the air bag (5) is nitrogen, the air bag (5) is connected to the connector (4) on the container bottle (2) through an air pipe (6), a first valve (7) is arranged at the connection between the air bag (5) and the air pipe (6), and a pressure relief device (8) is arranged on the right side of the air bag (5).
2. The anti-oxidation device for heat treatment of a nuclear fuel storage container according to claim 1, characterized in that: The pressure relief device (8) comprises a pressure relief valve (81), and a second valve (82) is provided between the pressure relief valve (81) and the air bag (5).
3. The anti-oxidation device for heat treatment of a nuclear fuel storage container according to claim 1, characterized in that: A third valve (9) is arranged above the airbag (5).
4. The anti-oxidation device for heat treatment of a nuclear fuel storage container according to claim 1, characterized in that: The gas in the air bag (5) is nitrogen.