Corrosion testing equipment

Abstract

The embodiment of the present invention discloses a corrosion test device, including a reactor, a temperature measuring component and a heating furnace for heating the reactor body, the reactor including a reactor body and a reactor cover, the reactor body having a receiving cavity for receiving a lead-bismuth medium, the top of the reactor body having an opening, the reactor cover being installed on the top of the reactor body for opening and closing the opening; the temperature measuring component including a temperature measuring protection tube and a thermocouple, the lower end of the temperature measuring protection tube being sealedly connected to the reactor cover and communicating with the receiving cavity, the thermocouple sleeve being arranged in the temperature measuring protection tube, the lower end of the thermocouple extending below the liquid level of the lead-bismuth medium in the receiving cavity for measuring the temperature of the lead-bismuth medium, the upper end of the thermocouple extending from the upper end of the temperature measuring protection tube, and the thermocouple and the temperature measuring protection tube being sealed. The corrosion test device of the embodiment of the present invention improves the accuracy of measuring the temperature of the lead-bismuth medium by extending the thermocouple into the lead-bismuth medium, thereby improving the test accuracy and test effect of the corrosion test.

Description

Technical Field

[0001] The invention relates to the technical field of corrosion testing, and in particular to a corrosion testing device. Background Art

[0002] Lead-bismuth fast reactors are liquid metal cooled nuclear reactors. Lead-bismuth fast reactors use lead-bismuth cooled fast reactors as cooling media, which have the advantage of high safety. However, during the operation of lead-bismuth cooled fast reactors, the core structural materials will be corroded by the lead-bismuth medium, and corrosion products will be produced in the core structure, which can easily cause flow blockage accidents, lead to deterioration of cladding heat transfer, and affect the flow heat transfer effect of the coolant. Therefore, the relevant technology proposes to conduct corrosion resistance tests on core structural materials in a lead-bismuth environment. When conducting corrosion resistance tests on service materials in a lead-bismuth environment, the lead-bismuth medium is heated into a liquid state, and the core structural materials are immersed in the liquid lead-bismuth medium for corrosion testing, so as to provide a corrosion test data basis for the practical application of lead-bismuth fast reactors, thereby improving the safety and life of lead-bismuth fast reactors. Summary of the invention

[0003] The present invention is made based on the inventor's awareness and discovery of the following problems existing in the related art.

[0004] The inventors discovered that when conducting corrosion resistance tests on service materials in a lead-bismuth environment, the temperature of the lead-bismuth medium has a significant impact on the corrosion of the materials. In the related art, the controlled temperature of a heating furnace is usually used as the temperature of the lead-bismuth medium or the temperature of the furnace body of the heating furnace is measured as the temperature of the lead-bismuth medium. However, the inventors realized that there is a deviation between the controlled temperature or measured temperature of the heating furnace and the temperature of the lead-bismuth medium, which reduces the accuracy of the corrosion test and affects the test precision and test effect.

[0005] The present invention aims to solve one of the technical problems in the related art at least to a certain extent. To this end, an embodiment of the present invention provides a corrosion testing device with high testing accuracy and good testing effect.

[0006] The corrosion testing device of the embodiment of the present invention comprises: a reaction kettle, the reaction kettle comprises a kettle body and a kettle cover, the kettle body has a containing cavity for containing 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;

[0007] A temperature measuring component, the temperature measuring component includes a temperature measuring protection tube and a thermocouple, the lower end of the temperature measuring protection tube is sealed and connected to the kettle cover and communicated with the accommodating chamber, the thermocouple sleeve is arranged in the temperature measuring protection tube, the lower end of the thermocouple extends below the liquid level of the lead-bismuth medium in the accommodating chamber, and is used to measure the temperature of the lead-bismuth medium, the upper end of the thermocouple extends from the upper end of the temperature measuring protection tube, and the thermocouple and the temperature measuring protection tube are sealed;

[0008] Heating furnace: The heating furnace is used to heat the kettle body.

[0009] The corrosion testing device of the embodiment of the present invention extends a thermocouple below the liquid surface of the lead-bismuth medium in the containing chamber of the reactor. The thermocouple is in direct contact with the lead-bismuth medium, which reduces the error between the measured temperature and the actual temperature of the lead-bismuth medium and improves the accuracy of measuring the temperature of the lead-bismuth medium, thereby improving the test accuracy and test effect of the corrosion testing device.

[0010] In some embodiments, the temperature measuring assembly also includes a first reducing ferrule joint, the upper end of the temperature measuring protection tube is sealedly connected to the first reducing ferrule joint, and the upper end of the thermocouple extends from the first reducing ferrule joint and is sealed to the first reducing ferrule joint.

[0011] In some embodiments, the temperature measuring component also includes an anti-corrosion tube, which is sleeved in the temperature measuring protection tube, and the lower end of the anti-corrosion tube extends below the liquid level of the lead-bismuth medium in the accommodating cavity. The thermocouple is arranged in the anti-corrosion tube, and the upper end of the anti-corrosion tube extends from the first reducing sleeve joint and is sealed between the first reducing sleeve joint.

[0012] In some embodiments, the lower end of the anti-corrosion pipe is a ceramic bulkhead pipe.

[0013] In some embodiments, the temperature measuring assembly also includes a second reducing ferrule joint, the upper end of the anti-corrosion pipe is sealedly connected to the second reducing ferrule joint, and the thermocouple extends from the second reducing ferrule joint and is sealed between the second reducing ferrule joint.

[0014] In some embodiments, the corrosion testing device further includes a sample fixing assembly, the sample fixing assembly including:

[0015] An installation pipe, the lower end of which is sealed and connected to the kettle cover and communicates with the accommodating cavity;

[0016] The lifting rod is sleeved in the installation tube, the lower end of the lifting rod extends into the accommodating cavity for installing the sample, and the upper end of the lifting rod extends from the upper end of the installation tube.

[0017] In some embodiments, the sample fixing assembly also includes a third reducing ferrule joint, the upper end of the mounting tube is sealingly connected to the third reducing ferrule joint, and the upper end of the lifting rod extends from the third reducing ferrule joint and is sealed to the third reducing ferrule joint.

[0018] In some embodiments, 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.

[0019] In some embodiments, the corrosion testing device further includes a ceramic coated crucible disposed in the containing cavity for containing the lead-bismuth medium.

[0020] In some embodiments, the corrosion testing device further 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 4 is a perspective view of a corrosion testing device according to an embodiment of the present invention.

[0022] Figure 2 is a cross-sectional view of a corrosion testing device according to an embodiment of the present invention.

[0023] Figure 3 yes Figure 2 A partial enlarged schematic diagram of part A in the middle.

[0024] Figure 4 4 is another cross-sectional view of the corrosion testing device according to the embodiment of the present invention.

[0025] Figure 5 yes Figure 4 A partial enlarged schematic diagram of part B in the middle.

[0026] Reference numerals:

[0027] 1-corrosion testing device, 10-reactor, 11-kettle body, 111-accommodating chamber, 112-opening, 12-kettle cover, 20-temperature measuring assembly, 21-temperature measuring protection tube, 22-thermocouple, 23-first reducer card joint, 24-anti-corrosion tube, 241-ceramic bulkhead tube, 25-second reducer card joint, 30-heating furnace, 40-sample fixing assembly, 41-installation tube, 42-lifting rod 43-third reducer card 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

[0028] 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.

[0029] The corrosion testing device 1 according to an embodiment of the present invention is described below with reference to the accompanying drawings. Figures 1 to 5 As shown, the corrosion testing device 1 according to the embodiment of the present invention includes a reaction kettle 10 , a temperature measuring component 20 and a heating furnace 30 .

[0030] 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.

[0031] The temperature measuring assembly 20 includes a temperature measuring protection tube 21 and a thermocouple 22. The lower end of the temperature measuring protection tube 21 is sealed and connected to the kettle cover 12 and communicated with the accommodating chamber 111. The thermocouple 22 is sleeved in the temperature measuring protection tube 21. The lower end of the thermocouple 22 extends below the liquid level of the lead-bismuth medium in the accommodating chamber 111 to measure the temperature of the lead-bismuth medium. The upper end of the thermocouple 22 extends from the upper end of the temperature measuring protection tube 21. The thermocouple 22 and the temperature measuring protection tube 21 are sealed to prevent the gas in the accommodating chamber 111 from escaping from between the thermocouple 22 and the temperature measuring protection tube 21.

[0032] 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 .

[0033] In the corrosion testing device 1 of the embodiment of the present invention, the lower end of the thermocouple 22 extends below the liquid level of the lead-bismuth medium in the accommodating chamber 111, and the thermocouple 22 is in direct contact with the lead-bismuth medium to directly measure the temperature of the lead-bismuth medium, instead of taking the controlled temperature of the heating furnace 30 or the measured temperature of the furnace body of the heating furnace 30 as the temperature of the lead-bismuth medium as in the related art. As a result, the measured temperature of the lead-bismuth medium is closer to the actual temperature of the lead-bismuth medium, reducing the error between the measured temperature of the lead-bismuth medium and the actual temperature of the lead-bismuth medium, improving the accuracy of measuring the temperature of the lead-bismuth medium, and thus improving the test accuracy and test effect of the corrosion testing device.

[0034] Some specific examples of the corrosion testing device 1 according to the embodiment of the present invention are described below.

[0035] like Figures 1 to 5 As shown, some specific examples of the corrosion testing device 1 of the present invention include a reaction kettle 10 , a temperature measuring component 20 and a heating furnace 30 .

[0036] like Figure 1 , 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 temperature measuring component 20.

[0037] 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.

[0038] 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. In some embodiments, 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.

[0039] In some embodiments, Figure 1-2 and Figure 4 As shown, the material immersion corrosion testing device 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.

[0040] 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.

[0041] 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 .

[0042] The temperature measuring assembly 20 includes a temperature measuring protection tube 21 and a thermocouple 22. The lower end of the temperature measuring protection tube 21 is sealed and connected to the kettle cover 12 and communicates with the accommodating cavity 111. Specifically, the lower end surface of the air inlet protection tube 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 cavity 111.

[0043] like Figure 2 As shown, the kettle cover 12 is provided with a through hole for installing the temperature measuring protection tube 21, and the lower end of the temperature measuring protection tube 21 fits in the through hole. For example, the temperature measuring protection tube 21 and the kettle cover 12 are sealed and welded, and the lower end of the temperature measuring protection tube 21 is flush with the lower surface of the kettle cover 12. In some embodiments, the lower end of the temperature measuring 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 temperature measuring protection tube 21 extends upward through the through hole on the upper end surface of the protective cover 60.

[0044] The thermocouple 22 is sleeved in the temperature measuring protection tube 21, and the lower end of the thermocouple 22 extends below the liquid level of the lead-bismuth medium in the accommodating chamber 111, and is used to measure the temperature of the lead-bismuth medium. The upper end of the thermocouple 22 extends from the upper end of the temperature measuring protection tube 21, and the thermocouple 22 and the temperature measuring protection tube 21 are sealed. In the illustrated embodiment, the thermocouple 22 and the upper end of the temperature measuring protection tube 21 are sealed to prevent the gas in the accommodating chamber 111 from escaping from between the thermocouple 22 and the temperature measuring protection tube 21, thereby improving the airtightness of the accommodating chamber 111.

[0045] In the example of the present invention, the temperature measuring protection tube 21 is installed on the kettle cover 12 and is sealed with the kettle cover 12, and the thermocouple 22 is sleeved in the temperature measuring protection tube 21, thereby avoiding damage to the thermocouple 22 caused by the thermocouple 22 being directly installed on the kettle cover 12. In particular, the deformation of the kettle cover 12 due to heat will not have an adverse effect on the thermocouple 22, thereby improving the life of the thermocouple 22.

[0046] In addition, the lower end of the thermocouple 22 extends below the liquid level of the lead-bismuth medium in the accommodating chamber 111, and the thermocouple 22 is in direct contact with the lead-bismuth medium to measure the temperature of the lead-bismuth medium, thereby reducing the error between the measured temperature of the lead-bismuth medium and the actual temperature of the lead-bismuth medium, thereby improving the accuracy of measuring the temperature of the lead-bismuth medium, thereby improving the test accuracy and test effect of the corrosion testing device 1.

[0047] Moreover, the temperature of the lead-bismuth medium is tested by using a thermocouple 22. Since the thermocouple 22 has a large temperature measuring range, high mechanical strength and good pressure resistance, the thermocouple 22 can measure higher temperatures, and is especially suitable for testing the temperature of high-temperature lead-bismuth medium.

[0048] In the corrosion testing device 1 of the embodiment of the present invention, the thermocouple 22 extends below the liquid surface of the lead-bismuth medium in the accommodating chamber 111. The thermocouple 22 is in direct contact with the lead-bismuth medium, which improves the accuracy of measuring the temperature of the lead-bismuth medium and improves the test accuracy and test effect of the corrosion testing device.

[0049] In some embodiments, Figures 1 to 3 As shown, the temperature measuring component 20 also includes a first reducing ferrule joint 23, the upper end of the temperature measuring protection tube 21 is sealedly connected to the first reducing ferrule joint 23, and the upper end of the thermocouple 22 extends from the first reducing ferrule joint 23 and is sealed between the first reducing ferrule joint 23.

[0050] Specifically, the thermocouple 22 is sealed and connected to the upper end of the temperature measuring protection tube 21 by using the first reducing ferrule joint 23 , thereby facilitating the disassembly, installation and sealing between the thermocouple 22 and the temperature measuring protection tube 21 .

[0051] Thermocouples 22 of different diameters can be sleeved in the temperature measuring protection tube 21 through the first reducing ferrule joint 23, so that thermocouples 22 of different diameters can be replaced as needed without replacing the temperature measuring protection tube 21, thereby improving applicability and reducing costs. The first reducing ferrule joint 23 can be any known suitable reducing ferrule joint.

[0052] In some embodiments, Figures 1 to 3 As shown, the temperature measuring component 20 also includes an anti-corrosion tube 24, which is sleeved in the temperature measuring protection tube 21, and the lower end of the anti-corrosion tube 24 extends below the liquid level of the lead-bismuth medium in the accommodating cavity 111. The thermocouple 22 is arranged in the anti-corrosion tube 24, and the upper end of the anti-corrosion tube 24 extends from the first reducing sleeve joint 23 and is sealed between the first reducing sleeve joint 23.

[0053] Specifically, the thermocouple 22 is sleeved in the anti-corrosion tube 24, and the lower end of the thermocouple 22 can be extended together with the lower end of the anti-corrosion tube 24 below the liquid level of the lead-bismuth medium in the accommodating cavity 111, thereby avoiding direct contact between the thermocouple 22 and the lead-bismuth medium in a high-temperature state, preventing the lead-bismuth medium from corroding the thermocouple 22, and improving the service life of the thermocouple 22.

[0054] The first reducing ferrule joint 23 is used to seal the anti-corrosion pipe 24 and the upper end of the temperature measuring protection pipe 21 , thereby facilitating the disassembly, installation and sealing between the anti-corrosion pipe 24 and the temperature measuring protection pipe 21 .

[0055] Through the first reducing ferrule joint 23, the anti-corrosion pipes 24 of different diameters can be sleeved in the temperature measuring protection pipe 21 through the first reducing ferrule joint 23. Therefore, the anti-corrosion pipes 24 of different diameters can be replaced as needed without replacing the temperature measuring protection pipe 21, thereby improving applicability and reducing costs.

[0056] In some embodiments, the lower end of the anti-corrosion pipe 24 is a ceramic bulkhead pipe 241, and the ceramic bulkhead pipe 241 has high temperature resistance.

[0057] like Figures 1 to 3 As shown, when the lower section of the anti-corrosion tube 24 (i.e., the ceramic bulkhead tube 241) extends into the lead-bismuth medium at a high temperature, the lower end of the anti-corrosion tube 24 is prevented from melting, and the anti-corrosion tube 24 is prevented from merging with the lead-bismuth medium after melting, so as to ensure the purity of the lead-bismuth medium. In other words, the lower end of the anti-corrosion tube 24 is the ceramic bulkhead tube 241, which can ensure the purity of the lead-bismuth medium and prevent the thermocouple 22 from being corroded by the lead-bismuth medium at a high temperature.

[0058] In some embodiments, Figures 1 to 3 As shown, the temperature measuring assembly 20 also includes a second reducing ferrule joint 25, the upper end of the anti-corrosion pipe 24 is sealedly connected to the second reducing ferrule joint 25, and the thermocouple 22 extends from the second reducing ferrule joint 25 and is sealed between the second reducing ferrule joint 25.

[0059] Specifically, the thermocouple 22 is sealed and connected to the upper end of the anti-corrosion pipe 24 by using the second reducing ferrule joint 25 , thereby facilitating the disassembly, installation and sealing between the thermocouple 22 and the anti-corrosion pipe 24 .

[0060] Through the second reducing ferrule joint 25, thermocouples 22 of different diameters can be sleeved in the anti-corrosion pipe 24 through the second reducing ferrule joint 25, so that thermocouples 22 of different diameters can be replaced as needed without replacing the anti-corrosion pipe 24, thereby improving applicability and reducing costs. The second reducing ferrule joint 25 can have the same structure as the first reducing ferrule joint 23, which will not be repeated here.

[0061] In some embodiments, the corrosion testing device 1 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 for mounting the sample a, and the upper end of the lifting rod 42 extends from the upper end of the mounting tube 41.

[0062] Specifically, Figure 1 , Figure 4 and Figure 5As 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.

[0063] 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.

[0064] In some embodiments, the sample fixing assembly also includes a third reducing ferrule joint 43, the upper end of the mounting tube 41 is sealedly connected to the third reducing ferrule joint 43, and the upper end of the lifting rod 42 extends from the third reducing ferrule joint 43 and is sealed between the third reducing ferrule joint 43.

[0065] Specifically, Figures 1 to 3 As shown, the lifting rod 42 is sleeved in the mounting tube 41 by using the third reducing ferrule joint 43, which facilitates the removal and installation of the lifting rod 42 between 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 third reducing ferrule 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 third reducing ferrule joint 43 can have the same structure as the first reducing ferrule joint 23 and the second reducing ferrule joint 25, which will not be repeated here.

[0066] 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.

[0067] 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.

[0068] In an embodiment of the invention, there may be multiple sample fixing assemblies 40 , for example, four, so that multiple samples can be tested simultaneously to improve the testing efficiency of the corrosion testing device 1 .

[0069] 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 .

[0070] Specifically, Figure 1 , Figure 4 and Figure 5 As shown, when the corrosion testing device 1 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 will be transmitted to the mounting tube 41 and the third reducing ferrule joint 43, thereby affecting the sealing between the mounting tube 41 and the third reducing ferrule joint 43. By providing the 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 third reducing ferrule joint 43.

[0071] 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.

[0072] In some embodiments, the corrosion testing device 1 further includes a ceramic coated crucible 50 disposed in the containing chamber 111 for containing a lead-bismuth medium.

[0073] like Figure 2 and Figure 4 As shown, a ceramic coated crucible 50 is placed in the accommodating chamber 111 of the corrosion testing device 1, 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. At the same time, after the test is completed, the ceramic coated crucible 50 can also be easily replaced or 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 accommodating chamber 111 can also be easily replaced through the ceramic coated crucible 50.

[0074] In the corrosion testing device of the embodiment of the present invention, the thermocouple extends below the liquid surface of the lead-bismuth medium in the containing chamber, and the thermocouple can be in direct contact with the lead-bismuth medium, thereby reducing the error between the measured temperature of the lead-bismuth medium and the actual temperature of the lead-bismuth medium, and improving the accuracy of measuring the temperature of the lead-bismuth medium, thereby improving the test accuracy and test effect of the corrosion testing device.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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.

Claims

1. A corrosion testing device, 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 temperature measuring component, the temperature measuring component comprises a temperature measuring protection tube and a thermocouple, the lower end of the temperature measuring protection tube is sealed and connected to the kettle cover and communicated with the accommodating chamber, the thermocouple is sleeved in the temperature measuring protection tube, the lower end of the thermocouple extends below the liquid level of the lead-bismuth medium in the accommodating chamber, and is used to measure the temperature of the lead-bismuth medium, the upper end of the thermocouple extends from the upper end of the temperature measuring protection tube, and the thermocouple and the temperature measuring protection tube are sealed; A heating furnace, the heating furnace is used to heat the kettle body; The temperature measuring assembly also includes a first reducing card joint, an anti-corrosion tube and a second reducing card joint. The upper end of the temperature measuring protection tube is sealed and connected to the first reducing card joint. The upper end of the thermocouple extends from the first reducing card joint and is sealed to the first reducing card joint. The anti-corrosion tube is sleeved in the temperature measuring protection tube. The lower end of the anti-corrosion tube extends below the liquid level of the lead-bismuth medium in the accommodating cavity. The thermocouple is arranged in the anti-corrosion tube. The upper end of the anti-corrosion tube extends from the first reducing card joint and is sealed to the first reducing card joint. The upper end of the anti-corrosion tube is sealed and connected to the second reducing card joint. The thermocouple extends from the second reducing card joint and is sealed to the second reducing card joint.

2. The corrosion testing device according to claim 1, characterized in that: The lower end of the anti-corrosion pipe is a ceramic bulkhead pipe.

3. The corrosion testing device according to any one of claims 1 to 2, 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.

4. The corrosion testing device according to claim 3, characterized in that: The sample fixing assembly also includes: A third reducing ferrule joint, the upper end of the mounting tube is sealed and connected to the third reducing ferrule joint, and the upper end of the lifting rod extends from the third reducing ferrule joint and is sealed to the third reducing ferrule joint.

5. The corrosion testing device according to claim 3, characterized in that: The sample fixing assembly also includes a cooling water jacket, which is arranged on the mounting tube and is used to cool the mounting tube.

6. The corrosion testing device 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.

7. The corrosion testing device 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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