Material immersion corrosion test equipment in lead-bismuth environment

Abstract

The embodiment of the present invention discloses a material immersion corrosion test device under a lead-bismuth environment, comprising a reactor, a deoxidation component and a heating furnace for heating the reactor body. The reactor comprises a reactor body and a reactor cover, the reactor body has a holding cavity for holding a lead-bismuth medium, the top of the reactor body has an opening, and the reactor cover is installed on the top of the reactor body for opening and closing the opening; the deoxidation component comprises an air intake protection pipe, an air intake pipe and an air outlet pipe, the lower end of the air intake protection pipe is sealed and connected to the reactor cover and communicated with the holding cavity, the air intake pipe is sleeved in the air intake protection pipe, the lower end of the air intake pipe extends below the liquid level of the lead-bismuth medium in the holding cavity, and is used to supply protective gas to the lead-bismuth medium, the upper end of the air intake pipe extends from the upper end of the air intake protection pipe, and the air intake pipe is sealed with the air intake protection pipe. The material immersion corrosion test device under a lead-bismuth environment of the embodiment of the present invention can simultaneously remove oxygen in the lead-bismuth medium and oxygen in the reactor, thereby improving the test accuracy and test effect.

Description

Technical Field

[0001] The invention relates to the technical field of corrosion testing, and in particular to a material immersion corrosion testing device in a lead-bismuth environment. Background Art

[0002] Lead-bismuth fast reactors are liquid metal cooled nuclear reactors. In nuclear reactors, the chain reaction of fission generates a large amount of heat energy. In order to prevent the reactor from burning due to overheating, lead-bismuth cooled fast reactors with greater safety advantages are used as cooling media. However, during the operation of lead-bismuth cooled fast reactors, the core structural materials will be corroded by the coolant of the lead-bismuth medium itself, and corrosion products will be generated in the core structure. The accumulation in the reactor may cause flow blockage accidents, thereby deteriorating the heat transfer of the cladding and affecting the flow heat transfer effect of the coolant.

[0003] In the related art, when the corrosion resistance test of the service material is carried out in the lead-bismuth environment, the lead-bismuth medium is easily oxidized, and it is necessary to ensure that the lead-bismuth medium is in an oxygen-free environment. Summary of the invention

[0004] The present invention is based on the inventor's discovery and understanding of the following facts and problems:

[0005] The related technology only considers removing oxygen in the internal space of the test equipment, but does not consider removing oxygen in the lead-bismuth medium, thus affecting the test accuracy and test effect.

[0006] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, the embodiment of the present invention provides a material immersion corrosion test device in a lead-bismuth environment with high test accuracy and good test effect.

[0007] The material immersion corrosion testing equipment in a lead-bismuth environment according to an embodiment of the present invention comprises:

[0008] A reaction kettle, comprising a kettle body and a kettle cover, wherein the kettle body has a receiving cavity for receiving the lead-bismuth medium, the top of the kettle body has an opening, and the kettle cover is installed on the top of the kettle body for opening and closing the opening;

[0009] A deoxidation component, the deoxidation component includes an air inlet protection pipe, an air inlet pipe and an air outlet pipe, the lower end of the air inlet protection pipe is sealed and connected to the kettle cover and communicated with the accommodating chamber, the air inlet pipe is sleeved in the air inlet protection pipe, the lower end of the air inlet pipe extends below the liquid level of the lead-bismuth medium in the accommodating chamber, and is used to supply protective gas to the lead-bismuth medium, the upper end of the air inlet pipe extends from the upper end of the air inlet protection pipe, the air inlet pipe and the air inlet protection pipe are sealed, and the lower end of the air outlet pipe is sealed and connected to the kettle cover and communicated with the accommodating chamber;

[0010] Heating furnace: The heating furnace is used to heat the kettle body.

[0011] The material immersion corrosion test equipment in the lead-bismuth environment of the embodiment of the present invention extends the lower end of the air inlet pipe below the liquid level of the lead-bismuth medium in the containing chamber of the reactor, thereby filling the lead-bismuth medium with protective gas, and can simultaneously remove oxygen in the lead-bismuth medium and oxygen in the space above the liquid level of the lead-bismuth medium in the containing chamber of the reactor, thereby avoiding the adverse effects of oxygen on the test accuracy and test effect. Moreover, by filling the lead-bismuth medium with protective gas, the lead-bismuth medium is placed in an oxygen-free environment, thereby avoiding the reaction of the lead-bismuth medium with oxygen, thereby further improving the test accuracy and test effect.

[0012] Optionally, the deoxygenation assembly further includes a first reducing ferrule joint, the upper end of the air intake protection tube is sealingly connected to the first reducing ferrule joint, and the upper end of the air intake pipe extends from the first reducing ferrule joint and is sealed to the first reducing ferrule joint.

[0013] Optionally, the deoxygenation component further includes a gas flow meter, which is arranged on the gas outlet pipe and / or the gas inlet pipe.

[0014] Optionally, the deoxidation component further includes a lead removal filter, and the lead removal filter is arranged on the air outlet pipe.

[0015] Optionally, the lower section of the air intake pipe is a ceramic tube.

[0016] Optionally, the material immersion corrosion testing equipment in a lead-bismuth environment further includes a sample fixing assembly, and the sample fixing assembly includes:

[0017] An installation pipe, the lower end of which is sealed and connected to the kettle cover and communicates with the accommodating cavity;

[0018] A lifting rod is sleeved in the mounting tube, the lower end of the lifting rod extends into the accommodating cavity for mounting the sample, and the upper end of the lifting rod extends from the upper end of the mounting tube.

[0019] Optionally, the sample fixing assembly also includes a second reducing ferrule joint, the upper end of the mounting tube is sealingly connected to the second reducing ferrule joint, and the upper end of the lifting rod extends from the second reducing ferrule joint and is sealed to the second reducing ferrule joint.

[0020] Optionally, the sample fixing assembly further includes a cooling water jacket, which is disposed on the mounting tube and is used to cool the mounting tube.

[0021] Optionally, the material immersion corrosion testing equipment in a lead-bismuth environment further includes a ceramic coated crucible disposed in the containing cavity for containing the lead-bismuth medium.

[0022] Optionally, the material immersion corrosion testing equipment in a lead-bismuth environment further includes a protective cover, which is sleeved on the outer side of the upper edge of the kettle body and the outer side of the kettle cover and covers the heating furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a three-dimensional diagram of a material immersion corrosion testing device in a lead-bismuth environment according to an embodiment of the present invention.

[0024] Figure 2 It is a cross-sectional view of a material immersion corrosion testing device in a lead-bismuth environment according to an embodiment of the present invention.

[0025] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A in the middle.

[0026] Figure 4 It is another cross-sectional view of the material immersion corrosion testing equipment in the lead-bismuth environment of the present invention.

[0027] Figure 5 yes Figure 4 A partial enlarged schematic diagram of part B in the middle.

[0028] Reference numerals:

[0029] 1-material immersion corrosion test equipment in lead-bismuth environment, 10-reactor, 11-kettle body, 111-accommodating chamber, 112-opening, 12-kettle cover, 20-deoxidation component, 21-air inlet protection pipe, 22-air inlet pipe, 221-ceramic tube, 23-air outlet pipe, 24-first reducing ferrule joint, 30-heating furnace, 40-sample fixing component, 41-installation pipe, 42-lifting rod, 43-second reducing ferrule joint, 44-cooling water jacket, 441-water outlet, 442-water inlet, 443-cooling body, 45-sample adapter, 50-ceramic coated crucible, 60-protective cover, a-sample. DETAILED DESCRIPTION

[0030] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0031] The following describes a material immersion corrosion test device 1 in a lead-bismuth environment according to an embodiment of the present invention with reference to the accompanying drawings. Figures 1 to 5 As shown, the material immersion corrosion testing equipment 1 in a lead-bismuth environment according to an embodiment of the present invention includes a reaction kettle 10 , a deoxidation component 20 and a heating furnace 30 .

[0032] Specifically, the reactor includes a reactor body 11 and a reactor cover 12. The reactor body 11 has a receiving chamber 111 for receiving a lead-bismuth medium. The sample a of the material to be tested (i.e., the test piece to be tested) is immersed in the lead-bismuth medium in the receiving chamber 111, so as to perform an immersion corrosion test on the sample a in a lead-bismuth environment. The top of the reactor body 11 has an opening 112, and the reactor cover 12 is installed on the top of the reactor body 11 to open and close the opening 112.

[0033] The deoxidation assembly 20 includes an air inlet protection pipe 21, an air inlet pipe 22 and an air outlet pipe 23. The lower end of the air inlet protection pipe 21 is sealed and connected to the kettle cover 12 and communicated with the accommodating chamber 111. The air inlet pipe 22 is sleeved in the air inlet protection pipe 21, and the lower end of the air inlet pipe 22 extends below the liquid level of the lead-bismuth medium in the accommodating chamber 111, and is used to supply protective gas to the lead-bismuth medium. For example, the protective gas can be an inert gas. The upper end of the air inlet pipe 22 extends from the upper end of the air inlet protection pipe 21, and the air inlet pipe 22 and the air inlet protection pipe 21 are sealed to prevent the gas in the accommodating chamber 111 from escaping from between the air inlet pipe 22 and the air inlet protection pipe 21. The lower end of the air outlet pipe 23 is sealed and connected to the kettle cover 12 and communicated with the accommodating chamber 111 to discharge the gas in the accommodating chamber 111, such as oxygen and other protective gases.

[0034] The heating furnace 30 is used to heat the kettle body 11 . For example, the kettle body 11 is seated in a heating chamber of the heating furnace 30 .

[0035] The material immersion corrosion test device 1 under the lead-bismuth environment of the embodiment of the present invention extends below the liquid level of the lead-bismuth medium in the accommodating chamber 111 through the lower end of the air inlet pipe 22, and fills the lead-bismuth medium with protective gas, so that the lead-bismuth medium is continuously bubbled under the action of the protective gas, thereby removing oxygen in the lead-bismuth medium and avoiding the influence of oxygen in the lead-bismuth medium on the test accuracy and test effect. Moreover, by filling the lead-bismuth medium with protective gas, the space above the liquid level of the lead-bismuth medium in the accommodating chamber 111 can be always filled with protective gas, so that the lead-bismuth medium is in an oxygen-free environment, avoiding the reaction of the lead-bismuth medium with oxygen. The material immersion corrosion test device 1 under the lead-bismuth environment of the embodiment of the present invention can ensure that the lead-bismuth medium is in an oxygen-free environment, and can remove oxygen in the lead-bismuth medium, so that the test environment of the material immersion corrosion test device 1 under the lead-bismuth environment is closer to the actual working condition, and the test accuracy and test effect are improved.

[0036] Some specific examples of the material immersion corrosion testing device 1 in a lead-bismuth environment according to an embodiment of the present invention are described below.

[0037] like Figures 1 to 5 As shown, some specific examples of the material immersion corrosion testing equipment 1 in a lead-bismuth environment of the present invention include a reaction kettle 10, a deoxidation component 20 and a heating furnace 30.

[0038] like Figure 2 and Figure 4As shown, the reactor includes a reactor body 11 and a reactor cover 12. The reactor body 11 has a receiving chamber 111 for receiving a lead-bismuth medium. The top of the reactor body 11 has an opening 112. The upper end of the reactor body 11 has a flange. The reactor cover 12 is installed on the top of the reactor body 11, and is used to open and close the opening 112, so as to facilitate the placement of the lead-bismuth medium into the receiving chamber 111 and the removal of the lead-bismuth medium from the receiving chamber 111, as well as the placement of samples into the receiving chamber 111 and the removal of samples from the receiving chamber 111, and the replacement and maintenance of other components in the receiving chamber 111, such as the deoxidation component 20.

[0039] Specifically, the kettle cover 12 is provided on the top surface of the kettle body 11. For example, the flange of the kettle body 11 is provided with a plurality of connection holes, and the connection holes can be through holes or threaded holes that penetrate along the thickness direction of the flange. The threaded holes can penetrate along the thickness direction of the flange, or can be blind holes. The connection holes can be evenly distributed along the circumference of the flange. The outer periphery of the kettle cover 12 is provided with connection through holes corresponding to the connection holes. The kettle cover 12 can be connected by bolts that pass through the connection through holes and the connection holes in the form of through holes, or can be connected by bolts that pass through the connection through holes and are threadedly fitted in the threaded holes.

[0040] Preferably, a seal is provided between the kettle cover 12 and the kettle body 11 to improve the sealing performance of the accommodating cavity 111 in the kettle body 11. For example, an annular groove is provided on one of the kettle body 11 and the kettle cover 12, and a sealing ring is provided in the annular groove. Optionally, an annular groove is provided on one of the kettle body 11 and the kettle cover 12, and an annular boss is provided on the other, and the annular boss is fitted in the annular groove. Further preferably, a seal is provided between the annular boss and the annular groove to further improve the sealing performance of the accommodating cavity 111.

[0041] In some embodiments, Figure 1-2 and Figure 4 As shown, the material immersion corrosion testing equipment 1 in a lead-bismuth environment also includes a protective cover 60, which is sleeved on the outer side of the upper edge of the kettle body 11 and the outer side of the kettle cover 12. More specifically, the protective cover 60 is cylindrical, and the lower end surface of the protective cover 60 is open. The upper end surface of the protective cover 60 is provided with a plurality of through holes, which will be further described in detail below. The protective cover 60 is sleeved on the outer peripheral side of the flange of the cover 12 and the kettle body 11.

[0042] The heating furnace 30 has a heating chamber, and the kettle body 11 is seated in the heating chamber so that the kettle body 11 is heated by the heating furnace 30. Figure 1 As shown, the protective cover 60 covers the heating furnace 30, and an installation space for accommodating the kettle body 11 and the kettle cover 12 is formed between the protective cover 60 and the heating furnace 30. The protective cover 60 can effectively block the outward heat radiation of the kettle body 11 and the kettle cover 12, playing a role in heat preservation and energy saving.

[0043] In some examples, such as Figure 1 As shown, the heating furnace 30 may be a pit-type furnace, and the reaction kettle 10 is placed inside the furnace of the pit-type furnace to heat the reaction kettle 10 .

[0044] In some specific examples, the deoxidation assembly 20 includes an air intake protection pipe 21, an air intake pipe 22, and an air outlet pipe 23. The lower end of the air intake protection pipe 21 is sealed and connected to the kettle cover 12 and communicates with the accommodating chamber 111. Specifically, the lower end surface of the air intake protection pipe 21 can be flush with the lower surface of the kettle cover 12, or can pass through the kettle cover 12 and slightly extend into the accommodating chamber 111.

[0045] like Figure 2 As shown, the kettle cover 12 is provided with a through hole for installing the air intake protection tube 21, and the lower end of the air intake protection tube 21 fits in the through hole. For example, the air intake protection tube 21 and the kettle cover 12 are sealed and welded, and the lower end of the air intake protection tube 21 is flush with the lower surface of the kettle cover 12. Optionally, the lower end of the air intake protection tube 21 can extend downward beyond the lower surface of the kettle cover 12 to extend into the accommodating cavity 111 for a short section. The upper end of the air intake protection tube 21 extends upward through the through hole on the upper end surface of the protective cover 60.

[0046] The air inlet pipe 22 is sleeved in the air inlet protection pipe 21, and the lower end of the air inlet pipe 22 extends below the liquid level of the lead-bismuth medium in the accommodating chamber 111, and is used to supply protective gas to the lead-bismuth medium. The upper end of the air inlet pipe 22 extends from the upper end of the air inlet protection pipe 21, and the air inlet pipe 22 and the air inlet protection pipe 21 are sealed. In the illustrated embodiment, the air inlet pipe 22 and the upper end of the air inlet protection pipe 21 are sealed to prevent the gas in the accommodating chamber 111 from escaping from between the air inlet pipe 22 and the air inlet protection pipe 21, thereby improving the airtightness of the accommodating chamber 111.

[0047] In the example of the present invention, the air intake protection tube 21 is installed on the kettle cover 12 and is sealed with the kettle cover 12, and the air intake pipe 22 is sleeved in the air intake protection tube 21, thereby avoiding the air intake pipe 22 being directly installed on the kettle cover 12 and causing damage to the air intake pipe 22. In particular, the deformation of the kettle cover 12 due to heat will not have an adverse effect on the air intake pipe 22, thereby improving the service life of the air intake pipe 22.

[0048] like Figure 1As shown, the lower end of the gas outlet pipe 23 is sealed and connected to the kettle cover 12 and communicates with the accommodating chamber 111. Specifically, the kettle cover 12 is provided with a through hole for the gas outlet pipe 23, and the lower end of the gas outlet pipe 23 fits in the through hole. The gas outlet pipe 23 can be sealed and welded with the kettle cover 12, and the lower end surface of the gas outlet pipe 23 can be flush with the lower surface of the kettle cover 12, or slightly extend downward into the accommodating chamber 111. The upper end of the gas outlet pipe 23 extends upward through the through hole on the upper end surface of the protective cover 60. The gas outlet pipe 23 is used to discharge the gas in the accommodating chamber 111, such as oxygen and protective gas, to prevent oxygen from staying in the lead-bismuth medium and in the space above the liquid level of the lead-bismuth medium, to prevent the lead-bismuth medium from being oxidized and to make the lead-bismuth medium always in a protective gas environment, so as to further improve the test accuracy and test effect.

[0049] In some embodiments, Figure 1-3 As shown, the deoxygenation assembly 20 also includes a first reducing ferrule joint 24, the upper end of the intake protection tube 21 is sealedly connected to the first reducing ferrule joint 24, and the upper end of the intake pipe 22 extends upward from the first reducing ferrule joint 24 and is sealed between the first reducing ferrule joint 24.

[0050] Specifically, the intake pipe 22 is sealed and connected to the upper end of the intake protection pipe 21 by using the first reducing sleeve joint 24, so as to facilitate the disassembly, installation and sealing between the intake pipe 22 and the intake protection pipe 21. The first reducing sleeve joint 24 plays the role of supporting the intake pipe 22.

[0051] Through the first reducing ferrule joint 24, the intake pipes 22 of different diameters can be sleeved in the intake protection pipe 21 through the first reducing ferrule joint 24, so that the intake pipes 22 of different diameters can be replaced as needed without replacing the intake protection pipe 21, thereby improving applicability and reducing costs. The first reducing ferrule joint 24 can be any known suitable reducing ferrule joint.

[0052] In some embodiments, the deoxygenation assembly 20 further includes a gas flow meter (not shown), which is disposed on the gas outlet pipe 23 and / or the gas inlet pipe 21 .

[0053] Specifically, the gas flow meter is used to detect the gas flow in the gas outlet pipe 23 and / or the gas inlet pipe 21. Preferably, a gas flow meter is provided on both the gas outlet pipe 23 and the gas inlet pipe 21, which can detect the gas flow in the gas outlet pipe 21 and the gas inlet pipe 23 at the same time, thereby adjusting the gas supply of the protective gas as needed, and detecting the air tightness of the material immersion corrosion test equipment 1 in the lead-bismuth environment.

[0054] In some embodiments, the deoxidation component 20 further includes a lead removal filter, which is disposed on the outlet pipe 23. When the lead-bismuth medium is at a high temperature, the lead may be vaporized. By installing the lead removal filter on the outlet pipe 23, the protective gas can be prevented from carrying the lead vapor into the atmosphere, thereby preventing the lead vapor from causing physical harm to the experimenter and improving the environmental performance. Preferably, the lead removal filter can be an exhaust water filter, so that the lead vapor can be absorbed by water so that the lead vapor is neutralized in the water.

[0055] In some embodiments, the lower section of the air inlet pipe 22 is a ceramic tube 221, and the ceramic tube 221 has high temperature resistance. Figure 2 As shown, the lower section of the air inlet pipe 22 is a ceramic tube 221. When the lower section of the air inlet pipe 22 (i.e., the ceramic tube 221) is extended into the lead-bismuth medium at a high temperature, the lower section of the air inlet pipe 22 can be prevented from softening, thereby increasing the life of the air inlet pipe 22 and improving the reliability of introducing the protective gas into the lead-bismuth medium. In addition, the lower section of the air inlet pipe 22 can be prevented from melting and merging with the lead-bismuth medium to ensure the purity of the lead-bismuth medium.

[0056] In some embodiments, the material immersion corrosion test device 1 under the lead-bismuth environment further includes a sample fixing assembly 40, which includes a mounting tube 41 and a lifting rod 42. The lower end of the mounting tube 41 is sealed and connected to the kettle cover 12 and communicates with the accommodating chamber 111. The lifting rod 42 is sleeved in the mounting tube 41, and the lower end of the lifting rod 42 extends into the accommodating chamber 111. The sample a can be installed at the lower end of the lifting rod 42, and the upper end of the lifting rod 42 extends from the upper end of the mounting tube 41.

[0057] Specifically, Figure 1 , Figure 4 and Figure 5 As shown, the mounting tube 41 is mounted on the kettle cover 12 and is sealed and connected to the kettle cover 12. For example, the kettle cover 12 is provided with a through hole for the mounting tube 41. The lower end of the mounting tube 41 can fit into the through hole and be sealed and welded to the kettle cover 12. The lower end of the mounting tube 41 can be flush with the lower surface of the kettle cover 12, or it can extend a small section into the accommodating cavity 111. The lower end of the mounting tube 41 is connected to the accommodating cavity 111, and the upper end of the mounting tube 41 extends upward through the through hole on the protective cover 60.

[0058] The lifting rod 42 is sleeved in the mounting tube 41 and is adjustable in axial position relative to the mounting tube 41, so as to facilitate adjusting the depth of the sample a inserted into the lead-bismuth medium. The mounting tube 41 can play the role of installing and protecting the lifting rod 42. For example, the lifting rod 42 does not need to be connected to the kettle cover 12, such as by welding, so as to prevent the lifting rod 42 from being affected by the high temperature of the kettle cover 12.

[0059] In some embodiments, the sample fixing assembly 40 also includes a second reducing ferrule joint 43, the upper end of the mounting tube 41 is sealedly connected to the second reducing ferrule joint 43, and the upper end of the lifting rod 42 extends from the second reducing ferrule joint 43 and is sealed between the second reducing ferrule joint 43.

[0060] Specifically, Figures 1 to 3 As shown, the lifting rod 42 is sleeved in the mounting tube 41 by using the second reducing sleeve joint 43, which facilitates the disassembly and installation between the lifting rod 42 and the mounting tube 41, and at the same time improves the sealing between the lifting rod 42 and the mounting tube 41, thereby preventing the gas in the accommodating chamber 111 from escaping through the mounting tube 41. Moreover, through the second reducing sleeve joint 43, the lifting rod 42 of different diameters can be replaced without replacing the mounting tube 41, thereby reducing costs and improving applicability. The second reducing sleeve joint 43 can have the same structure as the first reducing sleeve joint 24, which will not be repeated here.

[0061] In some embodiments, a sample adapter 45 is provided at the lower end of the lifting rod 42, and the sample a is installed at the lower end of the lifting rod 42 through the sample adapter 45. The sample adapter 45 is provided to facilitate the disassembly, assembly and replacement of the sample a.

[0062] Specifically, Figure 1 , Figure 4 and Figure 5 As shown, one end of the sample adapter 45 has a threaded hole, the lower end of the lifting rod 42 is provided with an external thread, the lifting rod 42 is threadedly matched with the sample adapter 45, and the sample a is installed at the other end of the sample adapter 45. Through the sample adapter 45, various forms of samples a can be installed at the lower end of the lifting rod 42 without replacing the lifting rod 42, thereby improving applicability and reducing costs.

[0063] In an embodiment of the present invention, there may be multiple sample fixing assemblies 40, for example, four, so that multiple samples a can be tested simultaneously to improve the testing efficiency of the material immersion corrosion testing device 1 in a lead-bismuth environment.

[0064] In some embodiments, the sample fixing assembly 40 further includes a cooling water jacket 44 . The cooling water jacket 44 is disposed on the mounting tube 41 for cooling the mounting tube 41 .

[0065] Specifically, Figure 1 , Figure 4 and Figure 5As shown, when the material immersion corrosion test device 1 in a lead-bismuth environment is used to test the sample a, the temperature of the kettle body 11 and the kettle cover 12 is relatively high, and the temperature of the kettle body 11 and the kettle cover 12 is transmitted to the mounting tube 41 and the second reducing ferrule joint 43, thereby affecting the sealing between the mounting tube 41 and the second reducing ferrule joint 43. By providing a cooling water jacket 44, the mounting tube 41 can be cooled to reduce the temperature of the mounting tube 41, thereby avoiding affecting the sealing between the mounting tube 41 and the second reducing ferrule joint 43.

[0066] like Figure 5 As shown, the cooling water jacket 44 includes an annular cooling body 443, and the cooling body 443 has an annular cooling cavity for accommodating cooling water. The water inlet 442 of the cooling water jacket 44 is installed on the cooling body 443 and communicated with the cooling cavity, and the water outlet 441 of the cooling water jacket 44 is installed on the cooling body 443 and communicated with the cooling cavity.

[0067] In some embodiments, the material immersion corrosion testing equipment 1 in a lead-bismuth environment further includes a ceramic coated crucible 50 disposed in the containing cavity 111 for containing the lead-bismuth medium.

[0068] like Figure 2 and Figure 4 As shown, a ceramic coated crucible 50 is placed in the receiving chamber 111 of the material immersion corrosion test equipment 1 under the lead-bismuth environment, and the lead-bismuth medium is contained in the ceramic coated crucible 50. The ceramic coating on the ceramic coated crucible 50 can prevent the crucible body from contaminating the lead-bismuth medium, thereby ensuring the purity of the lead-bismuth medium and improving the test accuracy and effect. After the test is completed, the ceramic coated crucible 50 can also be easily replaced and removed, so that after damage, only the ceramic coated crucible can be replaced without replacing the entire kettle body, further reducing costs. Moreover, the lead-bismuth medium in the receiving chamber 111 can also be easily replaced through the ceramic coated crucible 50.

[0069] The material immersion corrosion test equipment in the lead-bismuth environment of the embodiment of the present invention extends through the air inlet pipe below the liquid level of the lead-bismuth medium in the receiving chamber to fill the lead-bismuth medium with protective gas, which can remove oxygen in the lead-bismuth medium and avoid the influence of oxygen in the lead-bismuth medium on the test accuracy and test effect. Moreover, by filling the lead-bismuth medium with protective gas, the space above the liquid level of the lead-bismuth medium in the receiving chamber 111 can also be always filled with protective gas, so that the lead-bismuth medium is in an oxygen-free environment, avoiding the reaction between the lead-bismuth medium and oxygen, and further improving the test accuracy and test effect.

[0070] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “clockwise”, “counterclockwise”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply 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 limiting the present invention.

[0071] In addition, 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 at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0072] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0073] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] In the present invention, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0075] Although the above embodiments have been shown and described, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. Changes, modifications, substitutions and variations of the above embodiments by those of ordinary skill in the art are all within the scope of protection of the present invention.

Claims

1. A material immersion corrosion testing device in a lead-bismuth environment, characterized in that: include: A reaction kettle, the reaction kettle comprising a kettle body and a kettle cover, the kettle body having a receiving cavity for receiving a lead-bismuth medium, the top of the kettle body having an opening, and the kettle cover being installed on the top of the kettle body for opening and closing the opening; A deoxidation component, the deoxidation component comprises an air inlet protection pipe, an air inlet pipe and an air outlet pipe, the lower end of the air inlet protection pipe is sealed and connected to the kettle cover and communicated with the accommodating chamber, the air inlet pipe is sleeved in the air inlet protection pipe, the lower end of the air inlet pipe extends below the liquid level of the lead-bismuth medium in the accommodating chamber, and is used to supply protective gas to the lead-bismuth medium, the protective gas is an inert gas, the upper end of the air inlet pipe extends from the upper end of the air inlet protection pipe, the air inlet pipe and the air inlet protection pipe are sealed, the lower section of the air inlet pipe is a ceramic tube, and the lower end of the air outlet pipe is sealed and connected to the kettle cover and communicated with the accommodating chamber; A heating furnace is used to heat the kettle body.

2. The material immersion corrosion testing equipment in a lead-bismuth environment according to claim 1, characterized in that: The deoxidation assembly also includes a first reducing ferrule joint, the upper end of the intake protection pipe is sealingly connected to the first reducing ferrule joint, and the upper end of the intake pipe extends from the first reducing ferrule joint and is sealed to the first reducing ferrule joint.

3. The material immersion corrosion testing equipment in a lead-bismuth environment according to claim 1, characterized in that: The deoxygenation component further comprises a gas flow meter, and the gas flow meter is arranged on the gas outlet pipe and / or the gas inlet pipe.

4. The material immersion corrosion testing equipment in a lead-bismuth environment according to claim 1, characterized in that: The deoxidation component further comprises a lead removal filter, and the lead removal filter is arranged on the air outlet pipe.

5. The material immersion corrosion testing equipment in a lead-bismuth environment according to any one of claims 1 to 4, characterized in that: Also included is a sample fixing assembly, the sample fixing assembly comprising: A mounting tube, the lower end of which is sealed and connected to the kettle cover and communicates with the accommodating cavity; A lifting rod is sleeved in the mounting tube, the lower end of the lifting rod extends into the accommodating cavity for mounting the sample, and the upper end of the lifting rod extends from the upper end of the mounting tube.

6. The material immersion corrosion testing equipment in a lead-bismuth environment according to claim 5, characterized in that: The sample fixing assembly also includes: A second reducing ferrule joint, the upper end of the mounting tube is sealed and connected to the second reducing ferrule joint, and the upper end of the lifting rod extends from the second reducing ferrule joint and is sealed to the second reducing ferrule joint.

7. The material immersion corrosion testing equipment in a lead-bismuth environment according to claim 5, characterized in that: It also includes a cooling water jacket, which is arranged on the mounting pipe and is used to cool the mounting pipe.

8. The material immersion corrosion testing equipment in a lead-bismuth environment according to claim 1, characterized in that: Also included is a ceramic coating crucible which is arranged in the containing cavity and is used to contain the lead-bismuth medium.

9. The material immersion corrosion testing equipment in a lead-bismuth environment according to claim 1, characterized in that: The utility model also comprises a protective cover, which is sleeved on the outer side of the upper edge of the kettle body and the outer side of the kettle cover and covers the heating furnace.

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