CN111879911A - Experimental device for static compatibility of liquid metal - Google Patents
Experimental device for static compatibility of liquid metal Download PDFInfo
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- CN111879911A CN111879911A CN202010542891.9A CN202010542891A CN111879911A CN 111879911 A CN111879911 A CN 111879911A CN 202010542891 A CN202010542891 A CN 202010542891A CN 111879911 A CN111879911 A CN 111879911A
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- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
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- G01N33/205—Metals in liquid state, e.g. molten metals
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Abstract
The invention relates to an experimental device for static compatibility of liquid metal, which comprises a reaction kettle and a top cover matched with the reaction kettle; a liquid metal cavity and a sample placing part are arranged in the reaction kettle; the sample is capable of being immersed in the liquid metal chamber when the sample is placed on the sample placement member. The invention has the following beneficial effects: the device can be used for developing static compatibility experiments of materials and liquid metal, can be used for putting in various experimental samples such as corrosion, stretching, creep deformation and durability at one time, and can be used for developing static compatibility experiments of various liquid metal media such as sodium, sodium-potassium alloy, lead-bismuth alloy, lithium and the like by taking out the samples respectively after completing the experiments in time periods such as 1000h, 2000h, 3000h, 5000h and the like.
Description
Technical Field
The invention belongs to the field of nuclear industry, and particularly relates to an experimental device for static compatibility of liquid metal.
Background
Liquid metal is widely used in the energy industry, such as a sodium-cooled fast reactor using sodium as a coolant, an accelerator-driven clean nuclear energy system using a lead-bismuth alloy as a coolant, a lead-cooled fast reactor using lead as a coolant, a fusion reactor concept research using lithium and lithium-lead eutectic alloy as cladding materials, a sodium-potassium alloy heater simulating a reactor core of the reactor, and a heat pipe using potassium, sodium and lithium as heat transfer media. In both of these applications, compatibility of the media with the materials of construction needs to be considered to assess the life of the device for safe use.
It is necessary and necessary to carry out the research on the compatibility of the structural material and the liquid metal medium under corresponding conditions, and the corrosion resistance of the material under the conditions of the use temperature of the liquid metal, corresponding flow rate, limited impurity content and the like is researched. These liquid metals have particular physical, thermophysical and chemical properties:
liquid metals are generally used at higher temperatures: from melting point to about 600 ℃;
liquid metals generally have very reactive chemistry: for example, sodium and potassium react with oxygen extremely rapidly, sodium-potassium alloy is easy to ignite and burn in air, lithium reacts with water slowly, sodium and potassium react with water violently, lead is oxidized slowly in air and is oxidized rapidly at high temperature;
the structural material is in liquid metal at different flow rates: from rest to a flow rate of 25 m/s.
In order to realize corresponding environmental conditions, special devices are required to carry out related research, and liquid metal heat convection loops, liquid metal dynamic corrosion loops, liquid metal rotary corrosion devices and the like are generally used. The existing device can not meet the requirements of the static compatibility experiment of the liquid metal.
In view of the above, the present invention is particularly proposed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the experimental device for the static compatibility of the liquid metal.
The technical scheme of the invention is as follows:
an experimental device for the static compatibility of liquid metal comprises a reaction kettle and a top cover matched with the reaction kettle; a liquid metal cavity and a sample placing part are arranged in the reaction kettle; the sample is capable of being immersed in the liquid metal chamber when the sample is placed on the sample placement member.
Further, in the experimental device for the static compatibility of the liquid metal, the heat insulation layer is arranged outside the reaction kettle.
Further, in the experimental device for the static compatibility of the liquid metal, the heating part is arranged outside the reaction kettle; the heating part is connected with the temperature control part.
Further, in the experimental apparatus for the static compatibility of the liquid metal, the opening of the reaction kettle is disposed in the glove box.
Further, the experimental device for the static compatibility of the liquid metal further comprises a cooling water jacket for preventing the top cover from being overheated; and the cooling water jacket is arranged at the upper part of the reaction kettle and is connected with the circulating water cooler.
Further, in the experimental device for the static compatibility of the liquid metal, the liquid metal cavity is connected with the air inlet and outlet valve through a pipeline.
Further, according to the experimental device for the static compatibility of the liquid metal, the bottom of the liquid metal cavity is connected with the liquid metal inlet and outlet valve.
Further, in the above experimental apparatus for liquid metal static compatibility, the sample placing part is an inner cover capable of suspending a sample, and the inner cover is disposed in the liquid metal cavity.
The invention has the following beneficial effects:
the device can be used for developing static compatibility experiments of materials and liquid metal, can be used for putting in various experimental samples such as corrosion, stretching, creep deformation and durability at one time, and can be used for developing static compatibility experiments of various liquid metal media such as sodium, sodium-potassium alloy, lead-bismuth alloy, lithium and the like by taking out the samples respectively after completing the experiments in time periods such as 1000h, 2000h, 3000h, 5000h and the like.
Drawings
Fig. 1 is a schematic structural diagram of an experimental apparatus for liquid metal static compatibility according to the present invention.
In the attached drawings, 1, a circulating water cooler; 2. a temperature control member; 3. an intake and exhaust valve; 4. a top cover; 5. a glove box; 6. a cooling water jacket; 7. an inner cover; 8. a liquid metal; 9. a sample; 10. a heating member; 11. a reaction kettle; 12. a heat-insulating layer; 13. liquid metal inlet and outlet valves.
Detailed Description
The invention is described in detail below with reference to the figures and examples.
As shown in FIG. 1, the invention discloses an experimental device for static compatibility of liquid metal, comprising a reaction kettle 11 and a top cover 4 matched with the reaction kettle 11; the top cover 4 can isolate the reaction kettle from the glove box 5. The glove box 5 is capable of creating an inert environment to protect the liquid metal atmosphere during operation. The operator can operate the reaction kettle top cover 4 in the glove box 5 to take and place samples. A liquid metal cavity and a sample placing part are arranged in the reaction kettle 11; when sample 9 is placed on the sample mounting part, the sample 9 can be immersed in the liquid metal 8 in the liquid metal chamber. The liquid metal is a medium for carrying out static compatibility experiments of the material and the liquid metal. Sample 9 is a sample of material from which an experiment was performed. The sample arranging part is an inner cover 7 capable of hanging a sample 9, and the inner cover 7 is arranged in the liquid metal cavity. The liquid metal cavity is connected with an air inlet and outlet valve 3 through a pipeline. The air inlet and outlet valve 3 can control the reaction kettle 11 to be vacuumized or filled with inert gas. The bottom of the liquid metal cavity is connected with a liquid metal inlet and outlet valve 13.
In this embodiment, the opening of the reaction vessel 11 is provided in the glove box 5 for the convenience of the operator.
A heating part 10 is arranged outside the reaction kettle 11, and a heat-insulating layer 12 is arranged outside the reaction kettle 11 and the heating part 10; the heating part is connected with the temperature control part 2. The temperature control part 2 controls the heating part 10 to increase the temperature through a thermocouple, so that the reaction kettle 11 reaches the preset temperature. The heating part 10 heats the reaction kettle 11, the liquid metal inlet and outlet valve 13 and the like to reach a preset temperature. The insulating layer 12 in this embodiment is insulating cotton.
The experimental device for the static compatibility of the liquid metal also comprises a cooling water jacket 6 for reducing the upper temperature of the reaction kettle 11 and preventing the over-temperature of the top cover 4; and the cooling water jacket 6 is arranged at the upper part of the reaction kettle 11 and is connected with the circulating water cooler 1. The circulating water cooler 1 functions to circulate cooling water through the cooling water jacket 6.
The device can be used for developing static compatibility experiments of materials and liquid metal, can be used for putting in various experimental samples such as corrosion, stretching, creep deformation and durability at one time, and can be used for developing static compatibility experiments of various liquid metal media such as sodium, sodium-potassium alloy, lead-bismuth alloy, lithium and the like by taking out the samples respectively after completing the experiments in time periods such as 1000h, 2000h, 3000h, 5000h and the like.
The experimental device disclosed by the invention is used for carrying out an experiment on the static compatibility of a certain material and metal sodium, and the main steps are as follows:
1) pumping an air inlet and outlet valve V1 of the reaction kettle to a vacuum pumping neutral position, and vacuumizing the reaction kettle;
2) pumping a gas inlet and outlet valve V1 of the reaction kettle to a gas filling gear, and filling argon gas into the reaction kettle to a micro positive pressure; repeating the vacuum-pumping and air-filling operations once;
3) opening a top cover of the reaction kettle, placing the inner cover with the suspended sample in the reaction kettle, and covering the top cover;
4) heating the reaction kettle and the liquid metal inlet and outlet valve to 200 ℃ through a temperature controller;
5) connecting the external transfer tank with a liquid metal inlet and outlet valve, pressing a proper amount of metal sodium into the reaction kettle, and disconnecting the external transfer tank;
6) starting a circulating water cooler and controlling the temperature of a cooling water jacket;
7) heating the reaction kettle by a temperature controller to the experimental temperature, and starting the experiment;
8) when the preset experiment time is 1000 hours, reducing the temperature of the reaction kettle to 150 ℃ through a temperature controller, opening the top cover, and taking out the related sample on the inner cover; putting back other samples, and closing the top cover; heating the reaction kettle to the experimental temperature through a temperature controller;
9) repeating the step 8 when the preset experiment is 2000h and 3000 h;
10) after all experiments are completed, the temperature is reduced to 200 ℃, the external transfer tank is connected with a liquid metal inlet and outlet valve, the sodium metal is discharged out of the reaction kettle to the transfer tank, the reaction kettle is closed, the temperature is reduced to the room temperature, and the external transfer tank is disconnected.
In the prior art, a static kettle is directly placed in a hearth of a shaft furnace during research. Static kettles in the prior art need to be machined in an external machining mode, and experiments in certain preset time periods such as 1000h, 2000h and 3000h can be carried out only by each static kettle. And welding the upper cover and the cover of the static kettle, and needing to be processed in an external cooperation way. The volume of the static kettle is limited by the size of the hearth of the shaft furnace, and the number of placed samples is limited.
The experimental device does not need to be placed in a hearth of the shaft furnace, so that a larger volume can be set, and the samples such as corrosion, stretching and impact can be tested together.
In the prior art, a static kettle needs to be processed in an external cooperation mode to achieve high sealing requirements, only specific and frequent experiments can be carried out when a liquid metal compatibility experiment is carried out, the experimental device can carry out continuous experiments, samples can be freely taken and placed after the running time is reached, and the quality of a medium is not influenced.
The operation processes of implementation, sampling and the like of the test device reduce the steps of external machining, and the autonomous controllable operation is greatly improved.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.
Claims (8)
1. An experimental device for the static compatibility of liquid metal is characterized by comprising a reaction kettle and a top cover matched with the reaction kettle; a liquid metal cavity and a sample placing part are arranged in the reaction kettle; the sample is capable of being immersed in the liquid metal chamber when the sample is placed on the sample placement member.
2. The experimental device for the static compatibility of liquid metal as claimed in claim 1, wherein an insulating layer is arranged outside the reaction kettle.
3. The experimental device for the static compatibility of liquid metal as claimed in claim 1, wherein a heating component is arranged outside the reaction kettle; the heating part is connected with the temperature control part.
4. The experimental apparatus for testing the static compatibility of liquid metal as claimed in claim 1, wherein the opening of the reaction vessel is disposed in a glove box.
5. The experimental apparatus for testing the static compatibility of liquid metal as claimed in claim 1, further comprising a cooling water jacket for preventing the over-temperature of the top cover; and the cooling water jacket is arranged at the upper part of the reaction kettle and is connected with the circulating water cooler.
6. The experimental apparatus for testing the static compatibility of liquid metal as claimed in claim 1, wherein said liquid metal chamber is connected to an air inlet and outlet valve through a pipeline.
7. The experimental apparatus for testing the static compatibility of liquid metal as claimed in claim 1, wherein the bottom of said liquid metal chamber is connected to a liquid metal inlet and outlet valve.
8. The liquid metal static compatibility testing device of any of claims 1-7, wherein said sample placement member is an internal cover capable of hanging a sample, said internal cover being disposed within said liquid metal chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010542891.9A CN111879911A (en) | 2020-06-15 | 2020-06-15 | Experimental device for static compatibility of liquid metal |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010542891.9A CN111879911A (en) | 2020-06-15 | 2020-06-15 | Experimental device for static compatibility of liquid metal |
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| CN111879911A true CN111879911A (en) | 2020-11-03 |
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| CN202010542891.9A Pending CN111879911A (en) | 2020-06-15 | 2020-06-15 | Experimental device for static compatibility of liquid metal |
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- 2020-06-15 CN CN202010542891.9A patent/CN111879911A/en active Pending
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Application publication date: 20201103 |