Test device for rotary erosion corrosion of sample in high-temperature lead-bismuth environment

Abstract

The utility model relates to the technical field of material corrosion resistance testing, in particular to a sample rotating erosion corrosion testing device in a high-temperature lead bismuth environment, which comprises a test kettle, a rotating shaft, a driving motor and a plurality of erosion tables, and the plurality of erosion tables are arranged at intervals along the axial direction of the rotating shaft; a plurality of clamping structures are arranged on the washing table, a first sealing structure, an oxygen control assembly and a liquid level monitoring assembly are arranged on the test kettle, and an adjusting assembly is arranged on the rotating shaft. According to the device, through cooperative use of the adjusting assembly and the plurality of scouring tables, multiple types of samples can be mounted, so that the multiple types of samples can be subjected to synchronous rotary scouring corrosion test detection at a time, and the detection efficiency is higher.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of corrosion resistance test of materials, and in particular to a rotating scouring corrosion test device for a test sample in a high-temperature lead-bismuth environment. BACKGROUND

[0002] Nuclear energy is attracting much attention due to its advantages such as cleanliness, high energy density, low cost and reliability. However, the special environment of nuclear reactors puts higher requirements on structural materials, such as resistance to radiation damage, liquid metal corrosion and embrittlement. Among them, the scouring corrosion test in the lead-bismuth environment is crucial for evaluating the performance of structural materials in the nuclear reactor environment. As an important development direction of future nuclear energy technology, the operating environment and conditions of lead-bismuth fast reactors put extremely high requirements on the corrosion resistance and scouring resistance of structural materials. Scouring corrosion testing can simulate the actual reactor environment and deeply understand the corrosion behavior and performance of materials in lead-bismuth melts, providing scientific basis for reactor material selection and structural design. This test not only helps to ensure the safety and reliability of the reactor, reduce the risk of operation, but also optimizes the performance of the reactor and improves energy utilization efficiency. In addition, the results of scouring corrosion test have important guiding significance for the maintenance and overhaul of the reactor, which can reduce maintenance costs and prolong the service life of the reactor. Therefore, the scouring corrosion test in the lead-bismuth environment is an indispensable part of nuclear reactor technology research and application,

[0003] The existing scouring corrosion test device in the lead-bismuth environment mainly includes a test kettle and a scouring table arranged in the test kettle. A driving motor is installed on the test kettle, a rotating shaft is rotatably connected to the test kettle, one end of the rotating shaft is coaxially fixed with the output shaft of the motor, and the other end of the rotating shaft extends into the test kettle and is fixedly connected with the scouring table. In use, a single test sample is clamped and fixed on the scouring table, then the test kettle is sealed and lead-bismuth is introduced, and then the driving motor drives the rotating shaft to rotate, which drives the scouring table to rotate, so that the lead-bismuth in the test kettle flows with the rotation of the scouring table, thereby achieving the purpose of scouring corrosion test of the test sample on the scouring table.

[0004] However, the above-mentioned scouring corrosion test device has the following problems in use: only one type of test sample can be tested at a time, and when there are different types and different shapes and lengths of test samples, multiple scouring corrosion tests need to be performed using the above-mentioned device to obtain different test sample test structures, which is low in test efficiency and is not conducive to use. The utility model discloses a rotating scouring corrosion test device for a test sample in a high-temperature lead-bismuth environment.

[0005] In order to achieve the purpose of improving the test efficiency while ensuring the accuracy of the scouring corrosion test results of various types and shapes of test samples, the application provides a rotating scouring corrosion test device for a test sample in a high-temperature lead-bismuth environment.

[0006] The application provides a sample rotating scouring corrosion test device in a high-temperature lead-bismuth environment.

[0007] A sample rotating scouring corrosion test device in a high-temperature lead-bismuth environment, comprising a test kettle, a rotating shaft rotatably connected to the test kettle, a driving motor mounted on the test kettle, and a scouring table arranged in the test kettle, one end of the rotating shaft is coaxially fixedly connected with the output shaft of the driving motor, the other end of the rotating shaft is connected with the scouring table after penetrating through the test kettle, the scouring table is provided with a plurality of scouring tables, and the plurality of scouring tables are arranged in the axial direction of the rotating shaft, a plurality of clamping structures for fixing samples are uniformly arranged on the scouring table along the circumferential side of the rotating shaft, a first sealing structure for sealing the joint gap between the rotating shaft and the test kettle, an oxygen control assembly for detecting and controlling the oxygen concentration in the test kettle, and a liquid level monitoring assembly for detecting the lead-bismuth injection amount are further arranged on the test kettle, and an adjusting assembly for adjusting the spacing between two adjacent scouring tables is arranged on the rotating shaft.

[0008] By adopting the above technical scheme, when in use, the sample is fixed on the scouring table through the clamping structure, and samples of the same category or the same size are located on the same scouring table, so that the spacing between two scouring tables is adjusted through the adjusting assembly, so as to adapt to the installation of samples of different sizes, and then the whole is put into the test kettle after installation is completed, and the vacuum environment, the oxygen concentration and the liquid level of the injected liquid lead-bismuth in the test kettle are ensured through the cooperation of the first sealing structure, the oxygen control assembly and the liquid level monitoring assembly, so that the samples on the scouring table can be scoured by the liquid lead-bismuth, so as to ensure the accuracy of the synchronous rotating scouring corrosion test results of the plurality of samples in the test kettle, and the purpose of improving the test efficiency is realized under the premise of ensuring the accuracy of the scouring corrosion test results of samples of various categories and shapes.

[0009] Preferably, the test kettle comprises a kettle body and a kettle cover buckled on the kettle body, a test cavity is formed in the kettle body, and the kettle cover is used to close the test cavity; a first sealing ring and a first cooling structure for protecting the sealing property of the first sealing ring are arranged between the kettle cover and the kettle body; the scouring table is located in the test cavity; a lead-bismuth injection port for injecting liquid lead-bismuth into the test cavity is arranged on the kettle body; and a heat insulation structure for reducing heat conduction from the test cavity to the kettle cover is arranged on the end of the kettle cover facing the kettle body.

[0010] By adopting the above technical scheme, when in use, the influence of high temperature on the sealing property of the first sealing ring is reduced through the first cooling structure, so that the gap between the kettle cover and the kettle body is sealed through the first sealing ring, the vacuum environment in the test kettle is ensured, and the heat conduction from the test cavity to the kettle cover is reduced through the cooperation of the heat insulation structure, so as to ensure that the test cavity maintains a stable high-temperature environment, which is conducive to the subsequent test.

[0011] Preferably, the first cooling structure comprises a first water cooling channel and a first water inlet joint arranged on the kettle cover, and a second water cooling channel and a second water inlet joint arranged on the kettle body, the first and second water cooling channels are arranged close to the first sealing ring, the first water inlet joint is used for connecting the first water cooling channel with an external water source, and the second water inlet joint is used for connecting the second water cooling channel with the external water source.

[0012] By adopting the above technical scheme, when in use, cold water is circulated and introduced into the first and second water cooling channels from the external water source through the cooperation of the first and second water inlet joints, so that the kettle body and the kettle cover are cooled through the circulation of the cold water, thereby reducing the influence of high temperature on the first sealing ring.

[0013] Preferably, the heat insulation structure comprises a heat preservation layer fixed on the kettle cover, and a reflective layer fixed on the heat preservation layer, the heat preservation layer and the reflective layer have a certain spacing, and the heat preservation layer is located between the reflective layer and the kettle cover, and the reflective layer is formed with a mirror surface on the side facing the test cavity.

[0014] By adopting the above technical scheme, when in use, the mirror surface on the reflective layer and the heat preservation layer are used in cooperation to reduce the heat conduction effect of the test cavity to the kettle cover, thereby ensuring that the test cavity maintains a relatively stable high temperature environment.

[0015] Preferably, the first sealing structure comprises a magnetic fluid bearing arranged between the test kettle and the driving motor, the magnetic fluid bearing is fixed on the test kettle, the driving motor is fixed on the magnetic fluid bearing, the rotating shaft penetrates into the test kettle after penetrating through the magnetic fluid bearing, a second sealing ring is arranged between the magnetic fluid bearing and the driving motor, a third sealing ring is arranged between the magnetic fluid bearing and the test kettle, and a second cooling structure for preventing high temperature from affecting the sealing effect of the magnetic fluid bearing is further arranged on the test kettle.

[0016] By adopting the above technical scheme, when in use, by arranging the magnetic fluid bearing, the gap between the rotating shaft and the test kettle is sealed without affecting the rotation of the rotating shaft, and the connection gap between the magnetic fluid bearing, the driving motor and the test kettle is sealed in cooperation with the second and third sealing rings, so as to ensure that the test kettle maintains a vacuum environment, and the influence of high temperature on the magnetic fluid bearing is reduced through the second cooling structure.

[0017] Preferably, the second cooling structure comprises a water cooling jacket arranged between the test kettle and the magnetic fluid bearing, a third water inlet connector fixed on the water cooling jacket, a third water cooling channel formed in the water cooling jacket, and the third water inlet connector is used for connecting the third water cooling channel with an external water source, the rotating shaft penetrates into the test kettle through the magnetic fluid bearing and the water cooling jacket in sequence, the third sealing ring is arranged between the magnetic fluid bearing and the water cooling jacket, and a fourth sealing ring is arranged between the water cooling jacket and the test kettle.

[0018] By adopting the technical scheme, when in use, the fourth sealing ring is arranged to seal the connecting gap between the water cooling jacket and the test kettle, so as to ensure the vacuum environment in the test kettle; and the third water inlet connector is used to introduce external cold water into the third water cooling channel, so as to achieve the purpose of water cooling of the water cooling jacket, thereby reducing the temperature of heat conduction from the test kettle to the magnetic fluid bearing along the rotating shaft.

[0019] Preferably, the magnetic fluid bearing is further formed with a fourth water cooling channel and a fourth water inlet connector, and the fourth water inlet connector is used for connecting the fourth water cooling channel with an external water source.

[0020] By adopting the technical scheme, when in use, the fourth water cooling channel and the fourth water inlet connector are used to further cool the magnetic fluid bearing, so as to ensure that the heat conduction on the rotating shaft to the magnetic fluid bearing does not affect the sealing effect of the magnetic fluid bearing.

[0021] Preferably, the adjusting assembly comprises a limiting ring arranged between two adjacent scouring platforms, a gasket and a locking nut arranged at the end of the rotating shaft away from the driving motor, the two ends of the limiting ring are respectively abutted with one scouring platform on the corresponding side, the gasket is abutted with one scouring platform arranged away from the driving motor, the locking nut is threadedly connected on the rotating shaft, and the locking nut is abutted with the gasket.

[0022] By adopting the technical scheme, when in use, the height between the two adjacent scouring platforms is adjusted by replacing the limiting ring with different heights, so that the scouring platform can be installed with a test sample with different lengths, and the limiting ring and the scouring platform are abutted and fixed by cooperating with the gasket and the locking nut, so as to ensure that the scouring platform does not separate from the rotating shaft during rotation.

[0023] Preferably, the oxygen control assembly comprises an oxygen sensor arranged on the test kettle and a gas inlet for introducing argon-hydrogen gas or argon-oxygen gas, and the oxygen sensor is used for detecting the oxygen concentration in the test kettle.

[0024] By adopting the technical scheme, when in use, the oxygen concentration in the test kettle is monitored in real time through the oxygen sensor, when the oxygen concentration is low, argon-oxygen gas is introduced into the test kettle through the air inlet, so as to increase the oxygen concentration in the test kettle, when the oxygen concentration is high, argon-hydrogen gas is introduced into the test kettle through the air inlet, so as to reduce the oxygen concentration in the test kettle, so that the oxygen concentration in the test kettle is kept within a specified range during the lead-bismuth scouring corrosion test of the test sample, and the accuracy of the test result is ensured.

[0025] Preferably, the liquid level monitoring assembly comprises a first liquid level detection sensor arranged on the test kettle for monitoring the liquid level of the injected liquid lead-bismuth, and a second liquid level detection sensor for monitoring the liquid level of the discharged liquid lead-bismuth.

[0026] By adopting the technical scheme, when in use, the oxygen concentration in the test kettle is monitored in real time through the oxygen sensor, when the oxygen concentration is low, argon-oxygen gas is introduced into the test kettle through the air inlet, so as to increase the oxygen concentration in the test kettle, when the oxygen concentration is high, argon-hydrogen gas is introduced into the test kettle through the air inlet, so as to reduce the oxygen concentration in the test kettle, so that the oxygen concentration in the test kettle is kept within a specified range during the lead-bismuth scouring corrosion test of the test sample, and the accuracy of the test result is ensured.

[0027] In summary, the present application has at least one of the following beneficial technical effects:

[0028] 1. The test sample is fixed on the scouring table through the clamping structure, and test samples of the same category or the same size are located on the same scouring table, so that the distance between the two scouring tables is adjusted through the adjusting assembly to adapt to the installation of test samples of different sizes, and then the whole is put into the test kettle after installation, so that the purpose of improving the test efficiency is realized while ensuring the accuracy of the scouring corrosion test results of test samples of various categories and shapes;

[0029] 2. By arranging the heat insulation structure and the first cooling structure, the heat conduction efficiency from the test kettle to the kettle cover is reduced under the premise of ensuring the sealing effect of the test kettle, so that the temperature in the test kettle is always kept within a specified temperature range;

[0030] 3. By arranging the magnetic fluid bearing, the gap between the rotating shaft and the test kettle is sealed without affecting the rotation of the rotating shaft, and the influence of temperature on the sealing effect of the magnetic fluid bearing is reduced through the cooperation of the water cooling jacket, the fourth water cooling channel and the fourth water connection, so that the sealing effect of the test kettle is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0031] Figure 1 is the axonometric view of the overall structure in the embodiment of the present application;

[0032] Figure 2 is the exploded view of the test kettle structure mainly embodied in the embodiment of the application;

[0033] Figure 3 is the sectional view of the internal structure of the test kettle mainly embodied in the embodiment of the application;

[0034] Figure 4 is the exploded view of the installation structure of the scouring platform mainly embodied in the embodiment of the application.

[0035] Reference signs: 1, test kettle; 11, kettle body; 111, air extraction channel; 12, kettle cover; 13, first sealing ring; 14, first cooling structure; 141, first water cooling channel; 142, first water inlet connector; 143, second water cooling channel; 144, second water inlet connector; 15, lead bismuth inlet; 16, heat insulation structure; 161, heat preservation layer; 162, reflecting layer; 2, rotating shaft; 3, driving motor; 4, scouring platform; 5, clamping structure; 6, first sealing structure; 61, magnetic fluid bearing; 62, second cooling structure; 621, water cooling jacket; 622, third water inlet connector; 623, third water cooling channel; 63, fourth water inlet connector; 64, fourth water cooling channel; 7, oxygen control assembly; 71, oxygen sensor; 72, air vent; 8, liquid level monitoring assembly; 81, first liquid level detection sensor; 82, second liquid level detection sensor; 9, adjusting assembly; 91, limiting ring; 92, gasket; 93, locking nut; 10, test sample; 20, thermocouple. DETAILED DESCRIPTION

[0036] The following will be described in detail with reference to the accompanying drawings. Figure 1 - the accompanying drawings Figure 4 The application will be further described in detail.

[0037] The embodiment of the application discloses a test device for sample rotating scouring corrosion in a high-temperature lead bismuth environment.

[0038] Reference Figure 1 and Figure 2 A test device for sample rotating scouring corrosion in a high-temperature lead bismuth environment, comprising a test kettle 1 horizontally placed, the test kettle 1 is composed of a kettle body 11 and a kettle cover 12, a test cavity is integrally formed on the kettle body 11, a lead bismuth inlet 15 is integrally formed at the bottom end of the kettle body 11, the lead bismuth inlet 15 is communicated with the test cavity, in the application, the injection and discharge of liquid lead bismuth are realized through the lead bismuth inlet 15, in order to facilitate the discharge of liquid lead bismuth, the bottom wall of the test cavity is funnel-shaped, and the lead bismuth inlet 15 is located at the lowest part of the bottom wall of the test cavity.

[0039] Reference Figure 1 and Figure 2, the kettle cover 12 is used to block the test cavity opening, the kettle cover 12 is fixed on the kettle body 11 by bolts, the gas extraction channel 111 is arranged on the kettle body 11, the first sealing ring 13 is arranged between the kettle body 11 and the kettle cover 12, and the first sealing ring 13 is used for sealing the connecting gap between the kettle body 11 and the kettle cover 12; in use, the first sealing ring 13 is clamped by the kettle body 11 and the kettle cover 12, so that the sealing of the test cavity is ensured by the first sealing ring 13, and then the test cavity is subjected to vacuumizing treatment through the gas extraction channel 111, so that the test cavity is ensured to be in a vacuum environment.

[0040] Referring to Figure 1 and Figure 2 , when the test cavity is in a vacuum environment, high-temperature liquid lead bismuth needs to be injected into the test cavity through the lead bismuth injection port 15, the highest temperature of the liquid lead bismuth reaches 650 DEG C, so when the test cavity is filled with a certain amount of high-temperature liquid lead bismuth, the whole test cavity is in a high-temperature environment, and the heat of the liquid lead bismuth will inevitably be conducted to the kettle body 11 and the kettle cover 12. In order to reduce the influence of the temperature rise of the kettle body 11 and the kettle cover 12 on the sealing performance of the first sealing ring 13, a first cooling structure 14 is further arranged between the kettle body 11 and the kettle cover 12, and a heat insulation structure 16 is arranged on the side of the kettle cover 12 facing the test cavity.

[0041] Referring to Figure 2 and Figure 3 , the first cooling structure 14 is composed of a first water cooling channel 141, a first water inlet 142, a second water cooling channel 143 and a second water inlet 144. The first water cooling channel 141 and the first water inlet 142 are integrally formed on the kettle cover 12, the second water cooling channel 143 and the second water inlet 144 are integrally formed on the kettle body 11, the first water cooling channel 141 and the second water cooling channel 143 are arranged close to the first sealing ring 13, one end of the first water inlet 142 is communicated with the first water cooling channel 141, the other end is communicated with an external water source through a water valve, one end of the second water inlet 144 is communicated with the second water cooling channel 143, and the other end is communicated with the external water source through a second water valve.

[0042] Referring to Figure 2 and Figure 3 , in use, the first water inlet 142 and the second water inlet 144 are controlled to be communicated, so that cold water is introduced into the first water cooling channel 141 and the second water cooling channel 143 through the external water source, and part of the heat on the kettle body 11 and the kettle cover 12 is taken away under the circulation of the cold water, so that the temperature of the kettle body 11 and the kettle cover 12 near the first sealing ring 13 is not too high, and the sealing performance of the first sealing ring 13 is ensured.

[0043] Referring to Figure 2 and Figure 3The heat insulation structure 16 is used for reducing the heat conduction efficiency from the test cavity to the kettle cover 12, the heat insulation structure 16 is composed of a heat preservation layer 161 and a reflection layer 162, the heat preservation layer 161 is integrally formed on the bottom side wall of the kettle cover 12, the heat preservation layer 161 is fixed with heat preservation cotton through bonding, the heat preservation cotton is located between the heat preservation layer 161 and the kettle cover 12, the reflection layer 162 is fixed on the heat preservation layer 161 through bolts, and a certain space is also left between the reflection layer 162 and the heat preservation layer 161, the space is preferably set to 10 mm in the embodiment, and a mirror surface is formed on the bottom side of the reflection layer 162; in use, part of the heat is reflected through the mirror surface, and then the heat preservation cotton is set, so that the heat conduction efficiency from the test cavity to the kettle cover 12 is effectively reduced.

[0044] With reference to Figure 1 and Figure 3 The rotating shaft 2 and the driving motor 3 are arranged on the kettle cover 12, and the flushing table 4 is arranged in the test cavity, wherein the rotating shaft 2 is rotationally connected to the kettle cover 12, one end of the rotating shaft 2 is fixedly connected to the output shaft of the driving motor 3, the other end penetrates through the kettle cover 12 and is connected to the flushing table 4, the driving motor 3 is preferably a servo reducer motor with a servo reducer in the embodiment, and the first sealing structure 6 is further arranged on the kettle cover 12, and the first sealing structure 6 is used for sealing the gap between the rotating shaft 2 and the kettle cover 12.

[0045] With reference to Figure 1 and Figure 3 The first sealing structure 6 includes a magnetic fluid bearing 61, the magnetic fluid bearing 61 is fixed on the kettle cover 12 through bolts, the driving motor 3 is fixed on the magnetic fluid bearing 61 through bolts, the second sealing ring is arranged between the magnetic fluid bearing 61 and the driving motor 3, and the third sealing ring is arranged between the magnetic fluid bearing 61 and the kettle cover 12; in use, the connection gap between the magnetic fluid bearing 61 and the driving motor 3 is sealed through the second sealing ring, the connection gap between the magnetic fluid bearing 61 and the kettle cover 12 is sealed through the third sealing ring, and the magnetic fluid bearing 61 is used for dynamically sealing the rotating shaft 2 and the kettle cover 12 without affecting the rotation of the rotating shaft 2, so as to ensure the sealing effect in the test cavity.

[0046] With reference to Figure 2 and Figure 3In use, since the bottom end of the rotating shaft 2 needs to extend into the high-temperature liquid lead-bismuth, the heat of the liquid lead-bismuth will be conducted to the magnetic fluid bearing 61 along the rotating shaft 2. In order to reduce the influence of high temperature on the dynamic sealing effect of the magnetic fluid bearing 61, a second cooling structure 62 is further arranged between the kettle cover 12 and the magnetic fluid bearing 61. The second cooling structure 62 is composed of a water cooling jacket 621 and a third water connection 622. The water cooling jacket 621 and the magnetic fluid bearing 61 are fixed on the kettle cover 12 by the same set of bolts. The water cooling jacket 621 is internally formed with a third water cooling channel 623. The third water connection 622 is formed on the outer wall of the water cooling jacket 621. One end of the third water connection 622 is in communication with the third water cooling channel 623, and the other end is in communication with the external water source through a third water valve.

[0047] With reference to Figure 2 and Figure 3 , the third sealing ring is located between the water cooling jacket 621 and the magnetic fluid bearing 61. A fourth sealing ring is further arranged between the water cooling jacket 621 and the kettle cover 12. Through the cooperation of the third sealing ring and the fourth sealing ring, the connection gap between the water cooling jacket 621, the magnetic fluid bearing 61 and the kettle cover 12 can be sealed. Meanwhile, a fourth water cooling channel 64 and a fourth water connection 63 are formed on the shell of the magnetic fluid bearing 61. One end of the fourth water connection 63 is in communication with the fourth water cooling channel 64. The other end of the fourth water connection 63 is in communication with the external water source through a fourth water valve.

[0048] With reference to Figure 2 and Figure 3 , in use, the heat in the test cavity is conducted upward along the rotating shaft 2. First, the heat is cooled by the water cooling jacket 621, and the temperature near the magnetic fluid bearing 61 is obviously reduced. Then, the heat is further cooled by the fourth water cooling channel 64, so as to ensure that the temperature of the magnetic fluid bearing 61 is close to room temperature, thereby ensuring that the sealing performance of the magnetic fluid bearing 61 is not affected by high temperature.

[0049] With reference to Figure 3 and Figure 4 , a plurality of clamping structures 5 are uniformly arranged on the scouring table 4. The clamping structures 5 are used for fixing the sample 10 on the scouring table 4. The plurality of clamping structures 5 are distributed in a circumferential array with the rotating shaft 2 as the center. Each clamping structure 5 includes a limiting nut. The limiting nut is threadedly connected with the end of the sample 10. A plurality of mounting holes are formed on the scouring table 4. The plurality of mounting holes are correspondingly arranged with the limiting nuts. In use, the sample 10 is fixed on the scouring table 4 by inserting one end of the sample 10 through the mounting hole and locking by the limiting nut. Meanwhile, the linear velocities of the plurality of samples 10 on the same scouring table 4 are the same, so as to ensure that the test environments of the plurality of samples 10 on the same scouring table 4 are the same in the process of rotational scouring, thereby ensuring the accuracy of the test results.

[0050] Referring to Figure 3 and Figure 4 In order to improve the utilization of the space in the test cavity in the embodiment, the sample 10 is arranged in an inverted manner on the scouring table 4, and the inverted mounting manner also ensures that all the samples 10 can be scoured and corroded by the liquid lead bismuth during the rotation of the sample 10, and further ensures the accuracy of the test results.

[0051] Referring to Figure 3 and Figure 4 A plurality of scouring tables 4 can be arranged in the test cavity, and the plurality of scouring tables 4 are arranged in an axial direction of the rotating shaft 2, the scouring table 4 at the uppermost layer and the scouring table 4 at the bottom layer are arranged in a symmetrical manner, and the scouring table 4 at the uppermost layer is coaxially and fixedly connected with the rotating shaft 2, and the plurality of scouring tables 4 below are all keyed with the rotating shaft 2, and in the embodiment, the scouring table 4 is arranged in three, and the adjusting assembly 9 is arranged on the rotating shaft 2, the adjusting assembly 9 is used for adjusting the spacing between the adjacent two scouring tables 4, and preventing the scouring table 4 from being separated from the rotating shaft 2.

[0052] Referring to Figure 3 and Figure 4 The adjusting assembly 9 is composed of a limiting ring 91, a gasket 92 and a locking nut 93, wherein the limiting ring 91 is arranged in a plurality of numbers, and each limiting ring 91 is arranged between the adjacent two scouring tables 4, the limiting ring 91 is coaxially arranged with the rotating shaft 2, the top end of the limiting ring 91 is abuttingly matched with the scouring table 4 at the upper layer, the bottom end of the limiting ring 91 is abuttingly matched with the scouring table 4 at the bottom layer, the gasket 92 is below the scouring table 4 at the bottom layer, and the locking nut 93 is threadedly matched with the bottom end of the rotating shaft 2.

[0053] Referring to Figure 3 and Figure 4 In use, the spacing between the adjacent two scouring tables 4 is controlled by replacing the limiting ring 91 of different heights, so as to adapt to the samples 10 of different sizes, when the specified number of scouring tables 4 is mounted on the rotating shaft 2, the gasket 92 is sleeved on the bottom end of the rotating shaft 2, and the gasket 92 is abuttingly arranged on the scouring table 4 at the bottom layer by screwing the locking nut 93, so as to realize the connection between the scouring table 4 and the rotating shaft 2, and in order to ensure the connection stability of the scouring table 4, the locking nut 93 can be arranged in two, that is, the mounting stability of the scouring table 4 is further ensured by the joint action of the two locking nuts 93.

[0054] Referring to Figure 1 and Figure 2The oxygen control assembly 7 and the liquid level monitoring assembly 8 are further arranged on the kettle body 11, in use, the oxygen concentration in the test kettle 1 is monitored and adjusted in real time through the oxygen control assembly 7, so that the oxygen concentration in the test cavity is maintained in a specified range, and the liquid level of the liquid lead bismuth in the test cavity is monitored through the liquid level monitoring assembly 8, thereby facilitating the experimental personnel to use the test device.

[0055] Referring to 1 and Figure 2 The oxygen control assembly 7 is composed of an oxygen sensor 71 and a breather 72, wherein the oxygen sensor 71 extends into the test cavity after penetrating through the kettle cover 12, the oxygen sensor 71 is used for monitoring the oxygen concentration in the test cavity in real time, and the breather 72 is integrally formed on the kettle body 11, and the breather 72 is used for introducing argon-hydrogen gas or argon-oxygen gas into the test cavity, and after the test is completed, the gas in the test cavity is discharged through the gas extraction channel 111, that is, in the embodiment of the present application, the gas extraction channel 111 is connected in the gas circuit, and a three-way joint is required to divide it into two paths, so as to realize the sharing of gas extraction and exhaust.

[0056] Referring to Figure 1 and Figure 2 In use, the breather 72 is communicated with the external argon-hydrogen gas storage source and the external argon-oxygen gas storage source through the gas mass flow meter, when the oxygen sensor 71 monitors that the oxygen concentration in the test cavity is relatively high, an electric signal can be transmitted to the external PLC device, the PLC device receives and processes the electric signal, so as to control the gas mass flow meter to connect the breather 72 with the argon-hydrogen gas storage source, so as to introduce the argon-hydrogen gas into the test cavity, thereby achieving the purpose of reducing the oxygen concentration in the test cavity; when the oxygen sensor 71 monitors that the oxygen concentration in the test cavity is relatively low, the breather 72 can be switched to be connected with the argon-oxygen gas storage source through the control of the gas mass flow meter, so as to introduce the argon-oxygen gas into the test cavity, thereby achieving the purpose of increasing the oxygen concentration in the test cavity, and the whole use is simple and convenient.

[0057] Referring to Figure 1 and Figure 3 The liquid level monitoring assembly 8 is composed of a first liquid level detection sensor 81 and a second liquid level detection sensor 82, wherein one end of the first liquid level detection sensor 81 is electrically connected with an external signal lamp, the other end penetrates through the kettle cover 12 and extends into the test cavity and is arranged close to the kettle cover 12, the first liquid level detection sensor 81 is used for detecting the liquid level in the liquid lead bismuth injection process, one end of the second liquid level detection sensor 82 is electrically connected with an external signal lamp, the other end penetrates through the kettle cover 12 and extends into the test cavity and is arranged close to the bottom wall of the test cavity, and the second liquid level detection sensor 82 is used for detecting the liquid level in the liquid lead bismuth discharge process.

[0058] Referring to Figure 1 and Figure 3, in use, during the process of injecting liquid lead bismuth, the liquid level is detected by the first liquid level detection sensor 81, that is, as the liquid lead bismuth is injected, the corresponding signal light of the second liquid level detection sensor 82 lights up first, when the liquid level of the liquid lead bismuth approaches the first liquid level detection sensor 81, the liquid level of the liquid lead bismuth overflows the topmost scouring platform 4, at this time, the external signal light corresponding to the first liquid level detection sensor 81 lights up, thereby reminding the experimenter that the injection amount of the liquid lead bismuth reaches the specified range, and on this basis, a plurality of first liquid level detection sensors 81 can be arranged, and the depths of the plurality of first liquid level detection sensors 81 extending into the test chamber increase in turn along the horizontal direction, thereby achieving the purpose of monitoring and reminding the injection amount of the liquid lead bismuth in different ranges.

[0059] With reference to Figure 1 and Figure 3 In addition, the kettle body 11 is also provided with a thermocouple 20 for detecting the temperature in the test chamber; when the liquid lead bismuth is discharged, the liquid level is monitored by the second liquid level detection sensor 82, when the liquid level is below the horizontal plane corresponding to the second liquid level detection sensor 82, the signal light corresponding to the second liquid level detection sensor 82 is turned off, at this time, the temperature in the test chamber is detected by the thermocouple 20 to ensure that the temperature in the test chamber returns to normal, and then the test kettle 1 is opened to replace the test sample 10, thereby preventing the phenomenon of high-temperature oxidation of the liquid lead bismuth when the kettle cover 12 is opened in a high-temperature environment.

[0060] The implementation principle of the embodiment of the present application is: in use, different types of test pieces are installed on the corresponding scouring platforms 4 according to their sizes, then the scouring platforms 4 are installed on the rotating shaft 2 one by one, and the adjacent scouring platforms 4 are adjusted to appropriate spacing by using different heights of limiting rings 91, and finally the assembly of the test sample 10, the scouring platform 4 and the rotating shaft 2 is completed by locking through the gasket 92 and the locking nut 93, when the assembly is completed, the whole is placed in the test chamber, and the test kettle 1 is subjected to vacuumizing treatment, then high-temperature liquid lead bismuth at a specified temperature is injected, after a certain amount of liquid lead bismuth is injected, the experimenter stops injecting liquid lead bismuth by observing the light of the signal light corresponding to the first liquid level detection sensor 81, then the driving motor 3 is started to drive the rotating shaft 2 to rotate, and the rotating shaft 2 drives the scouring platform 4 to rotate in the liquid lead bismuth, thereby achieving the test purpose of synchronous scouring and corrosion of the plurality of test samples 10 on the scouring platform 4, after detection, the liquid lead bismuth is discharged to a specified kettle, and the experimenter can observe the state of the signal light corresponding to the second liquid level detection sensor 82 during the discharge process, when the signal light is extinguished, it proves that the liquid lead bismuth in the test chamber has been completely discharged, then the test kettle 1 is cooled and the kettle cover 12 is opened to take out the test sample 10, thereby completing the synchronous rotating scouring and corrosion test of a plurality of types and quantities of test samples 10, the whole test process is simple and efficient, and is more conducive to use.

[0061] The above are all preferred embodiments of the present application, and do not limit the protection scope of the present application, so that: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A rotating sample brush corrosion test apparatus in a high temperature lead bismuth environment, characterized by: The utility model provides a kind of test kettle, including test kettle (1), rotating shaft (2) being rotatably connected in the test kettle (1), driving motor (3) being installed on the test kettle (1), and scouring platform (4) being arranged in the test kettle (1), one end of the rotating shaft (2) is coaxially fixedly connected with the output shaft of driving motor (3), the other end of the rotating shaft (2) is connected with scouring platform (4) after passing through test kettle (1), the scouring platform (4) is provided with several, and several scouring platform (4) is spaced along the axial direction of rotating shaft (2), and the scouring platform (4) is uniformly provided with several clamping structures (5) for fixing sample (10) on the circumferential side of rotating shaft (2), the test kettle (1) is also provided with first sealing structure (6) for sealing the connecting gap between rotating shaft (2) and test kettle (1), oxygen control assembly (7) for detecting and controlling the oxygen concentration in test kettle (1), liquid level monitoring assembly (8) for detecting lead bismuth injection amount, adjusting assembly (9) is provided on the rotating shaft (2) for adjusting the spacing between adjacent two scouring platforms (4).

2. The rotating sample erosion test device in a high-temperature lead bismuth environment according to claim 1, characterized in that: The test kettle (1) includes kettle body (11) and kettle cover (12) buckled on the kettle body (11), the kettle body (11) is provided with a test cavity, and the kettle cover (12) is used for closing the test cavity, the first sealing ring (13) is arranged between the kettle cover (12) and the kettle body (11), and the first cooling structure (14) is used for protecting the sealing performance of the first sealing ring (13), the scouring platform (4) is located in the test cavity, the kettle body (11) is provided with a lead bismuth injection port (15) for introducing liquid lead bismuth into the test cavity, and the kettle cover (12) is provided with a heat insulation structure (16) at one end facing the kettle body (11) for reducing heat conduction from the test cavity to the kettle cover (12).

3. The device for rotating erosion-corrosion test of sample in high-temperature lead-bismuth environment according to claim 2, characterized in that: The first cooling structure (14) includes a first water cooling channel (141) and a first water inlet (142) arranged on the kettle cover (12), and a second water cooling channel (143) and a second water inlet (144) arranged on the kettle body (11), the first water cooling channel (141) and the second water cooling channel (143) are arranged close to the first sealing ring (13), the first water inlet (142) is used for connecting the first water cooling channel (141) with an external water source, and the second water inlet (144) is used for connecting the second water cooling channel (143) with an external water source.

4. The device for rotating erosion-corrosion test of sample in high-temperature lead-bismuth environment according to claim 2, characterized in that: The heat insulation structure (16) includes a heat preservation layer (161) fixed on the kettle cover (12) and a reflective layer (162) fixed on the heat preservation layer (161), there is a certain spacing between the heat preservation layer (161) and the reflective layer (162), and the heat preservation layer (161) is located between the reflective layer (162) and the kettle cover (12), and the reflective layer (162) is formed with a mirror surface on the side facing the test cavity.

5. The device for rotating erosion-corrosion test of sample in high-temperature lead-bismuth environment according to claim 1, characterized in that: The first sealing structure (6) comprises a magnetic fluid bearing (61) arranged between the test kettle (1) and the driving motor (3), the magnetic fluid bearing (61) is fixed on the test kettle (1), the driving motor (3) is fixed on the magnetic fluid bearing (61), the rotating shaft (2) penetrates into the test kettle (1) through the magnetic fluid bearing (61), a second sealing ring is arranged between the magnetic fluid bearing (61) and the driving motor (3), and a third sealing ring is arranged between the magnetic fluid bearing (61) and the test kettle (1). The test kettle (1) is further provided with a second cooling structure (62) for preventing high temperature from affecting the sealing effect of the magnetic fluid bearing (61).

6. The device for rotating erosion-corrosion test of sample in high-temperature lead-bismuth environment according to claim 5, characterized in that: The second cooling structure (62) comprises a water cooling jacket (621) arranged between the test kettle (1) and the magnetic fluid bearing (61), and a third water inlet (622) fixed on the water cooling jacket (621), the water cooling jacket (621) is formed with a third water cooling channel (623), the third water inlet (622) is used for connecting the third water cooling channel (623) with an external water source, the rotating shaft (2) penetrates into the test kettle (1) through the magnetic fluid bearing (61) and the water cooling jacket (621) in sequence, the third sealing ring is arranged between the magnetic fluid bearing (61) and the water cooling jacket (621), and a fourth sealing ring is arranged between the water cooling jacket (621) and the test kettle (1).

7. The device for rotating erosion-corrosion test of sample in high-temperature lead-bismuth environment according to claim 5, characterized in that: The magnetic fluid bearing (61) is further formed with a fourth water cooling channel (64) and a fourth water inlet (63), and the fourth water inlet (63) is used for connecting the fourth water cooling channel (64) with an external water source.

8. The device for rotating erosion-corrosion test of sample in high-temperature lead-bismuth environment according to claim 1, characterized in that: The adjusting assembly (9) comprises a limiting ring (91) arranged between two adjacent scouring tables (4), a gasket (92) and a locking nut (93) arranged at the end of the rotating shaft (2) away from the driving motor (3), the two ends of the limiting ring (91) are respectively abutted with one scouring table (4) on the corresponding side, the gasket (92) is abutted with one scouring table (4) arranged away from the driving motor (3), the locking nut (93) is threadedly connected on the rotating shaft (2), and the locking nut (93) is abutted with the gasket (92).

9. The device for rotating erosion-corrosion test of sample in high-temperature lead-bismuth environment according to claim 1, characterized in that: The oxygen control assembly (7) comprises an oxygen sensor (71) arranged on the test kettle (1) and a gas inlet (72) for introducing argon-hydrogen gas or argon-oxygen gas, and the oxygen sensor (71) is used for detecting the oxygen concentration in the test kettle (1).

10. The device for rotating erosion-corrosion test of sample in high-temperature lead-bismuth environment according to claim 1, characterized in that: The liquid level monitoring assembly (8) comprises a first liquid level detection sensor (81) arranged on the test kettle (1) for monitoring the liquid level of the injected liquid lead bismuth and a second liquid level detection sensor (82) for monitoring the liquid level of the discharged liquid lead bismuth.

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