Test equipment and test method for simulating erosion of ship plate steel in polar region crushed ice water area

Abstract

The invention discloses test equipment and a test method for simulating erosion of ship plate steel in a polar region crushed ice water area. The test equipment comprises an ice-water mixed wear test box, a rotary sample clamp device and a circulating temperature control device, the rotary sample clamp device is located in the ice-water mixed abrasion test box and comprises a stirring motor, the stirring motor is installed on a stirring supporting frame, the stirring supporting frame is installed on a test material barrel, an output shaft of the stirring motor is connected with a rotary sample clamp support, and the rotary sample clamp support is connected with a plurality of clamp bodies. The clamp body is used for fixing a sample, a propeller driving motor is mounted on the bottom surface of the test material barrel, an output shaft of the propeller driving motor is connected with a reverse thrust propeller, and the reverse thrust propeller is located in the test material barrel; the circulating temperature control device comprises a constant-temperature water bath box and a circulating temperature control outer barrel, and a liquid inlet pipe and a liquid outlet pipe are connected between the constant-temperature water bath box and the circulating temperature control outer barrel. The device can more accurately control the scouring speed of water to the sample.

Description

Technical Field

[0001] The present invention relates to the technical field of simulation equipment for the erosion of steel plates by ice water, and in particular to an experimental equipment and an experimental method for simulating the erosion of shipbuilding steel in polar ice-breaking waters. Background Art

[0002] Due to the uniqueness of the polar regions in terms of geopolitics, economy, environment and military, various countries attach great importance to polar resources. Polar ships sail in the summer ice edge areas of the Arctic and Antarctic. The expansion of the shipping window in the Arctic and Antarctic routes has led to an increasing demand for ships to sail in ice-breaking waters. To cope with the ice impact in polar ice-breaking waters, the steel for polar ships plays a very important role in the performance of ships sailing in the polar regions: on the one hand, during the navigation of polar ships, the coating may fall off, resulting in the exposure of the base material, and the ice water erosion test plays a key role in the selection of shipbuilding steel; on the other hand, the ice water erosion test of shipbuilding steel provides a scientific basis for subsequent coating development, local strengthening of ship structures and the design of new ship structures.

[0003] At present, there are very few erosion data of steel for polar use in ice water environment and equipment for simulating navigation in polar environment. It is very difficult to carry out tests in the polar marine environment. There is no such marine environment in the adjacent seas of our country, so in-situ sea trials cannot be carried out nearby. And although in-situ sea trials have the characteristics of being real and accurate, they have the following deficiencies: First, simulating the ice water environment in the polar region requires a large amount of manpower, material resources and financial resources; Second, it is impossible to characterize the test steel in time after the polar environment test; Third, the environment is harsh and there are many uncontrollable factors in the test process. Therefore, there is an urgent need to develop and design an equipment for simulating the navigation of ships in polar ice-breaking waters to fill the blank in this regard.

[0004] At present, there are few simulation tests on ice-water erosion in extreme environments in China. On the one hand, the existing equipment for simulating erosion and wear in polar broken ice waters cannot control test variables such as the ice-water ratio, ice shape, navigation speed, and navigation mileage, resulting in inaccurate variable control. On the other hand, some equipment is large in size, occupies too much test site space, and has a high cost. Although the simulation is accurate, the degree of automation is low and the operation difficulty is high. Currently, the erosion test equipment is mainly divided into three types, including pipe flow type, jet type, and rotary type. The patent with the application number 201610096668.X mentions a test equipment for simulating metal corrosion in a dynamic seawater environment. This equipment is of the pipe flow type and can control the water temperature well. However, in the coexistence condition of ice and water, the reproducibility of the navigation test in broken ice waters is not high, and at the same time, the determination of parallel specimens cannot be carried out. Secondly, the biggest disadvantage of the pipe flow type equipment is that it cannot accurately control the erosion speed, especially in long-term tests, the erosion speed on the specimen surface cannot be stabilized at a specific value. The patent with the application number 202011164237.5 mentions a rotary metal erosion and corrosion equipment. This equipment is of the rotary type and relies on water bath temperature control, resulting in uneven heating of the solution, which may ultimately lead to ice formation on the barrel wall. Secondly, this equipment does not solve the problem of accurately controlling the erosion speed as mentioned in the patent with the application number 201610096668.X; The jet type test equipment is relatively common, but it has major problems. On the one hand, for long-term tests, a large amount of solid-liquid two-phase solution is required for jetting. Secondly, the jet type test equipment has poor simulation effects in accurately controlling the erosion speed and impact force, and there are many other problems.

[0005] It is not difficult to see from the above-mentioned existing technologies that the existing simulation equipment all has problems in accurately controlling the erosion speed and impact force.

[0006] Therefore, there is an urgent need in this field for a new type of test equipment and test method for simulating the erosion of ship plate steel in polar broken ice waters to solve the above problems. Summary of the Invention

[0007] The purpose of the present invention is to provide a test equipment and test method for simulating the erosion of ship plate steel in polar broken ice waters to solve the problems existing in the above-mentioned existing technologies and be able to accurately control the erosion speed and impact force on the specimen.

[0008] To achieve the above purpose, the present invention provides the following solutions:

[0009] The present invention discloses a test equipment for simulating the erosion of ship plate steel in polar broken ice waters, including an ice-water mixed wear test box, a rotary specimen fixture device, and a circulating temperature control device;

[0010] The rotating sample fixture device is installed inside the ice - water mixed wear test chamber. The rotating sample fixture device includes a stirring motor, which is installed on a stirring support frame. The stirring support frame can be installed on the test barrel. The output shaft of the stirring motor is connected to a rotating sample fixture bracket, and the rotating sample fixture bracket is connected to a number of fixture bodies. The fixture bodies are used to fix samples. The bottom surface of the test barrel is installed with a propeller drive motor, and the output shaft of the propeller drive motor is connected to an anti - thrust propeller, and the anti - thrust propeller is located inside the test barrel.

[0011] The circulating temperature control device includes a constant temperature water bath and a circulating temperature control outer barrel. The test barrel is placed inside the circulating temperature control outer barrel, and an inlet pipe and an outlet pipe are connected between the constant temperature water bath and the circulating temperature control outer barrel.

[0012] Preferably, the stirring support frame includes a support main body and four telescopic clamping plates. A first positioning hole is respectively provided at the four corners of the support main body, and a number of second positioning holes are spacedly provided on the four telescopic clamping plates. The first positioning hole and the second positioning hole are connected by a positioning bolt, and the four telescopic clamping plates are used to clamp the test barrel.

[0013] Preferably, the rotating sample fixture bracket is a cross - shaped member. One of the fixture bodies is respectively connected to the four end parts of the rotating sample fixture bracket. A number of sample empty slots are provided on the fixture body, and the a number of sample empty slots are distributed vertically. A sample fixing bolt is respectively thread - connected to both sides of the sample empty slot, and the sample is clamped between the two sample fixing bolts.

[0014] Preferably, the ice - water mixed wear test chamber is a high - low temperature test chamber.

[0015] Preferably, a number of reserved holes are provided on the side wall of the ice - water mixed wear test chamber.

[0016] Preferably, non - metal coatings are provided on the inner walls of both the ice - water mixed wear test chamber and the test barrel.

[0017] Preferably, a flow velocity meter is installed inside the test barrel.

[0018] Preferably, a temperature sensor is installed inside the test barrel.

[0019] Preferably, an erosion angle is formed between the fixture body and the tangent direction during the rotational movement of the fixture body, and the erosion angle is 0° - 90°.

[0020] The present invention discloses a test method for a test device for simulating the erosion of ship - plate steel in polar ice - breaking waters, including the following steps:

[0021] S1. Check the airtightness of the equipment and the safety of the circuit settings;

[0022] S2. Set the temperature and humidity of the ice-water mixed wear test chamber, add artificial seawater to the test bucket, and at the same time, make the heat of the artificial seawater evenly distributed by rotating the counterpropulsion propeller, and detect the temperature of the artificial seawater through a temperature sensor;

[0023] S3. After the temperature of the artificial seawater in the test bucket is stable, turn on the circulating temperature control device and adjust the temperature of the artificial seawater between -1.8°C and 0°C;

[0024] S4. Wait until the temperature of the artificial seawater is stable between -1.8°C and 0°C, and then add the prepared ice cubes to the test bucket;

[0025] S5. Select a rotating specimen fixture bracket with different erosion angles according to the specific research part of the hull, install the specimen on the fixture body, calculate the sailing distance according to the radius, rotation speed, and rotation time of the rotating specimen fixture bracket, start the stirring motor, set the rotation speed of the stirring motor, and time;

[0026] S6. After the test is completed, dry and seal the specimen or dry it for characterization.

[0027] The present invention has achieved the following technical effects compared with the prior art:

[0028] The present invention uses a stirring motor to drive the fixture body and the specimen fixed thereon to perform a rotational movement. During the rotational movement of the specimen, the artificial seawater in the test bucket will scour it, so as to simulate the scouring effect of real seawater on the steel for ship plates. However, in actual situations, there is still a difference between the water flow scouring effect caused by only one stirring motor and the scouring speed of real seawater. Therefore, the present invention further adds a counterpropulsion propeller, which can further increase the scouring speed and impact force of the artificial seawater on the specimen, so as to be closer to the real situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required in the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0030] Figure 1 It is a schematic structural diagram of the test equipment for simulating the erosion of steel for ship plates in polar ice-breaking waters in Embodiment 1;

[0031] Figure 2Schematic diagram of the appearance of the test equipment for simulating the erosion of ship plate steel in polar ice-breaking waters in Example 1;

[0032] Figure 3 Side view of the test equipment for simulating the erosion of ship plate steel in polar ice-breaking waters in Example 1;

[0033] Figure 4 Schematic diagram of the structure of the rotating specimen fixture device in the test equipment for simulating the erosion of ship plate steel in polar ice-breaking waters in Example 1;

[0034] Figure 5 Rotating specimen fixture device for the simulated ship bow part of the test equipment for simulating the erosion of ship plate steel in polar ice-breaking waters in Example 1;

[0035] Figure 6 Rotating specimen fixture device for the simulated ship midship part of the test equipment for simulating the erosion of ship plate steel in polar ice-breaking waters in Example 1;

[0036] Figure 7 Connection diagram of the circulation temperature control device in the test equipment for simulating the erosion of ship plate steel in polar ice-breaking waters in Example 1;

[0037] Figure 8 Internal schematic diagram of the test material bucket in the test equipment for simulating the erosion of ship plate steel in polar ice-breaking waters in Example 1;

[0038] In the figure: 100 - Ice-water mixture wear test box; 110 - Reserved hole; 200 - Rotating specimen fixture device; 210 - Stirring motor; 211 - Stirring support frame; 220 - Rotating specimen fixture bracket; 221 - Specimen fixing bolt; 222 - Fixture body; 230 - Test material bucket; 240 - Counter - driving propeller; 250 - Flow velocity meter; 300 - Circulation temperature control device; 310 - Constant temperature water bath; 311 - Inlet pipe; 312 - Outlet pipe; 320 - Circulation temperature control outer barrel; 330 - Temperature sensor. Detailed implementation manners

[0039] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0040] The purpose of the present invention is to provide a test equipment and test method for simulating the erosion of ship plate steel in polar ice-breaking waters, so as to solve the problems existing in the above - mentioned prior art and be able to accurately control the erosion speed and impact force on the specimen.

[0041] To make the above objects, features, and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0042] Embodiment 1

[0043] As Figures 1-8 shown, this embodiment provides a test device for simulating the erosion of steel for ship plates in polar ice-breaking waters, including an ice-water mixed wear test chamber 100, a rotating specimen fixture device 200, and a circulating temperature control device 300.

[0044] The rotating specimen fixture device 200 is installed inside the ice-water mixed wear test chamber 100. The rotating specimen fixture device 200 includes a stirring motor 210, which is installed on a stirring support frame 211 by screws, and the stirring support frame 211 can be installed on a test material bucket 230. The output shaft of the stirring motor 210 is connected to a rotating specimen fixture support 220, and the output shaft of the stirring motor 210 is located at the center of the rotating specimen fixture support 220. A number of fixture bodies 222 are connected around the rotating specimen fixture support 220, and the fixture bodies 222 are used to fix specimens. A propeller drive motor is installed on the outer bottom surface of the test material bucket 230. To prevent the propeller drive motor from contacting the circulating solution, a protective cover can also be provided outside the propeller drive motor to isolate the propeller drive motor. The output shaft of the propeller drive motor passes through the bottom of the test material bucket 230 and is connected to a counter-thrust propeller 240, and the counter-thrust propeller 240 is located below the inside of the test material bucket 230.

[0045] The circulating temperature control device 300 includes a constant temperature water bath 310 and a circulating temperature control outer barrel 320. The constant temperature water bath 310 is located outside the ice-water mixture wear test box 100, and the circulating temperature control outer barrel 320 is located inside the ice-water mixture wear test box 100. The test bucket 230 is placed inside the circulating temperature control outer barrel 320. An inlet pipe 311 and an outlet pipe 312 are connected between the constant temperature water bath 310 and the circulating temperature control outer barrel 320. Since the constant temperature water bath 310 is a prior art, its structure will not be described in detail. Its general working principle is as follows: The constant temperature water bath 310 can heat or cool the circulating solution. Then, the heated or cooled circulating solution in the constant temperature water bath 310 will be transported through the inlet pipe 311 to the annular space between the circulating temperature control outer barrel 320 and the test bucket 230 to exchange heat with the artificial seawater in the test bucket 230, so that the artificial seawater is in a constant temperature state. The heat-exchanged circulating solution will flow out from the outlet pipe 312 and then flow back into the constant temperature water bath 310 for cooling or heating (depending on the test requirements), thus completing a cycle process. The opening of the circulating temperature control device 300 is used to simulate polar environments below or above the freezing point of seawater, and at the same time has special requirements for test variables such as the ice-water ratio and ice shape. Among them, the circulating solution is selected in the constant temperature water bath 310 according to the simulated environmental temperature for low-temperature environmental tests. The freezing temperature of the selected circulating solution should be lower than the test temperature to avoid freezing; for high-temperature environmental tests, the vaporization temperature of the selected circulating solution should be higher than the test temperature to avoid volatilization; generally, alcohol is used as the circulating solution.

[0046] For the requirements of some special test conditions, such as the problem that the solution system cannot control special test variables such as the ice-water ratio and ice shape when simulating polar atmospheric temperatures below -1.8°C to 0°C. Studying from the essence, since the ice-forming temperature of the solution system needs to be as low as about -1.8°C (that is, the freezing point of seawater is about -1.8°C). When seawater freezes, as the ice age increases, salt gradually precipitates. The millennium ice in the polar environment is defaulted to pure water ice, and the melting point of pure water ice is 0°C. To ensure that the ice does not melt and the seawater does not freeze, the technical solution proposed by the present invention is:

[0047] The temperature of the solution system is maintained at the freezing point of the sea ice-seawater mixed solution system by means of an external circulating temperature control device 300 for the test barrel 230. For special test requirements, a large number of experimental results show that the atmospheric temperature only controls the interface between the seawater-sea ice mixed solution system and the air. Since the density of ice is less than that of seawater, the ice will float on the surface of the artificial seawater. The low-temperature atmosphere does not affect test variables such as the shape of the ice and the ice-water ratio. At the same time, the water body flow in the real environment keeps the deep water area in a non-freezing state, that is, the temperature of the deep water area is higher than the surface temperature of the solution and greater than or equal to the freezing point temperature. Therefore, the temperature of the deep water area needs to be controlled near the freezing point to ensure that the seawater does not freeze and affect the ice-water ratio on the surface. The water temperature of the deep water area is controlled at about -1.8°C - 0°C (set according to specific test requirements), and the surface temperature (i.e., the temperature of the ice floating on the surface) is the atmospheric temperature, which is adjusted according to the actual situation of the real environment.

[0048] In actual use, first add artificial seawater to the test barrel 230, and start the constant temperature water bath 310 to transport the circulating solution to the external circulating temperature control barrel 320. At the same time, install the specimen on the fixture body 222 and extend it into the test barrel. Start the stirring motor 210, and the stirring motor 210 drives the specimen to rotate in the artificial seawater to simulate ship navigation, and the artificial seawater will scour the specimen. However, relying solely on the stirring motor 210, there is still a certain gap between the scouring effect of the artificial seawater on the specimen and the real situation. At this time, the propeller drive motor can be turned on to drive the reaction force propeller 240 to rotate, and the rotation direction of the reaction force propeller 240 is opposite to that of the stirring motor 210 (or the fixture body 222) and the rotation speeds are the same, so as to further enhance the scouring speed and strength of the artificial seawater on the specimen, making it more conform to the real situation.

[0049] In this embodiment, as Figure 4 shown, the stirring support frame 211 is in an overall "I" - shaped structure. Specifically, the stirring support frame 211 includes a support main body and four telescopic clamping plates. The four telescopic clamping plates are respectively installed at the four corners of the support main body. The support main body is a rectangular plate in the middle for fixing the stirring motor 210. A first positioning hole is respectively provided at the four corners of the support main body, and a number of second positioning holes are spacedly provided on the four telescopic clamping plates. The first positioning hole and the second positioning hole are connected by a positioning bolt, that is, the positioning bolt passes through the first positioning hole and the second positioning hole in sequence and is threadedly connected to the corresponding nut to realize the fixation of the support main body and the telescopic clamping plate. And when the first positioning hole corresponds to different second positioning holes, the extended length of the telescopic clamping plate is also different, so as to clamp test barrels 230 of different sizes. And in order to facilitate the four telescopic clamping plates to better clamp the test barrel 230, the telescopic clamping plate is set to an L - shaped structure. Its horizontal side is provided with second positioning holes and is connected to the support main body, and its vertical side is used to clamp the outer wall of the test barrel 230.

[0050] In this embodiment, the rotating specimen fixture bracket 220 is a cross-shaped member, and there are four fixture bodies 222. One fixture body 222 is connected to each of the four end portions of the rotating specimen fixture bracket 220. The fixture body 222 is provided with a plurality of specimen slots, and the plurality of specimen slots are distributed vertically. Specifically, there are three specimen slots, and all of them are rectangular slots with the same size. It should be noted here that the reason for providing a plurality of specimen slots is to provide installation positions at different heights for the specimens, so as to simulate the ice-water erosion process at different depths of the hull.

[0051] A specimen fixing bolt 221 is threadedly connected to each side of each specimen slot, and the two specimen fixing bolts 221 are used to clamp the specimen. The specimen is a steel plate structure for ship plates. The reason for using the specimen fixing bolt 221 to fix the steel plate is that the gap between the two specimen fixing bolts 221 can be adjusted by loosening or tightening the specimen fixing bolt 221, so as to clamp specimens of different sizes.

[0052] The circulating temperature control outer barrel 320 is sleeved outside the test barrel 230. Since the barrel wall of the test barrel 230 is preferentially heated, the diameter of the rotating specimen fixture bracket 220 should be as close as possible to the diameter of the test barrel 230 (or the fixture body 222 should be as close as possible to the inner wall of the test barrel 230) to ensure that the solution system is fully stirred and the heat distribution is uniform.

[0053] In this embodiment, the ice-water mixed wear test chamber 100 is a common high and low temperature test chamber in the laboratory, which can control the internal temperature (this is the prior art) and is used to simulate the extreme ambient air temperature.

[0054] In this embodiment, a plurality of reserved holes 110 are provided on the side wall of the ice-water mixed wear test chamber 100, and each reserved hole 110 is respectively used for the inlet pipe 311, the outlet pipe 312 and the electric wire to pass through. And in order to further improve the sealing performance at the reserved holes 110, when the inlet pipe 311 and the outlet pipe 312 pass through the reserved holes 110, a sealing ring can be installed to seal the gap between each pipe fitting and the reserved holes 110, thereby slowing down the heat exchange efficiency between the inside of the ice-water mixed wear test chamber 100 and the outside.

[0055] In this embodiment, non-metallic coatings are provided on the inner walls of both the ice-water mixed wear test chamber 100 and the test barrel 230, and the existing epoxy zinc-rich primer can be used for the non-metallic coating. On the one hand, due to liquid splashing, applying the epoxy zinc-rich primer can extend the service life of the ice-water mixed wear test chamber 100; on the other hand, it can avoid galvanic corrosion between the ice-water mixed wear test chamber 100 and the test barrel 230 in a humid environment and ensure the test accuracy.

[0056] In this embodiment, a flowmeter 250 is installed inside the test bucket 230 to monitor the flow rate of the artificial seawater.

[0057] In this embodiment, a temperature sensor 330 is installed inside the test bucket 230 to monitor the temperature of the artificial seawater. And it should be noted here that the above-mentioned ice-water mixed wear test chamber 100, constant temperature water bath 310, stirring motor 210, propeller drive motor and other devices are all electrically connected to the control device, and the control device controls the operation of each device. Also, the flowmeter 250 and the temperature sensor 330 are also electrically connected to the control device. The flowmeter 250 and the temperature sensor 330 will transmit the flow rate signal and the temperature signal to the control device in real time, and the control device will send corresponding control signals to the corresponding devices (such as the stirring motor 210, the propeller drive motor and the constant temperature water bath 310) according to the relevant data to control their operation. For the control device, an existing industrial control computer or background host can be used.

[0058] In this embodiment, an erosion angle is formed between the fixture body 222 and the tangential direction when the fixture body 222 makes a rotational movement, and the erosion angle is 0° - 90°. Specifically, as Figures 4-6 shown, where Figure 4 and Figure 5 are one embodiment, Figure 6 and Figure 5 and Figure 6 are another. It can be seen from

[0059] Example Two

[0060] This embodiment provides a test method for a test device for simulating the erosion of ship plate steel in polar ice-breaking waters. Based on the test device for simulating the erosion of ship plate steel in polar ice-breaking waters disclosed in Example One, it includes the following steps:

[0061] S1. Check the tightness of the devices (such as the ice-water mixed wear test chamber 100 and the constant temperature water bath 310) and whether the circuit settings are safe.

[0062] S2. Set the temperature and humidity of the ice-water mixed wear test chamber 100, add artificial seawater to the test bucket 230, and at the same time rotate the counterpropulsion propeller 240 to evenly distribute the heat of the artificial seawater, and detect the temperature of the artificial seawater through the temperature sensor 330.

[0063] S3. After the temperature of the artificial seawater in the test bucket 230 stabilizes, turn on the circulating temperature control device 300 and adjust the temperature of the artificial seawater to be between -1.8°C and 0°C.

[0064] S4. After the temperature of the artificial seawater stabilizes between -1.8°C and 0°C, add the prepared ice cubes to the test bucket 230. When adding the ice cubes, variables such as the ice-water ratio (ice quantity), ice shape, and ice particle size need to be considered.

[0065] S5. Select the rotating specimen fixture bracket 220 with different erosion angles according to the specific research part of the hull. Install the specimen on the fixture body 222. Calculate the navigation distance based on the radius, rotation speed, and rotation time of the rotating specimen fixture bracket 220. Start the stirring motor 210, set the rotation speed of the stirring motor 210, and start timing.

[0066] S6. After the test is completed, dry and seal the specimen or dry it for characterization. Specifically, detection means such as CLSM, SEM, and EDS can be relied on to characterize the erosion morphology, rust layer composition, etc. of the specimen surface.

[0067] Regarding whether to turn on the circulating temperature control device 300 when simulating polar atmospheric temperatures lower than or higher than -1.8°C - 0°C, there are the following five explanations:

[0068] 1. When simulating polar atmospheric temperatures around -1.8°C - 0°C, variables such as the ice-water ratio and ice shape of the sea ice-seawater mixed solution remain unchanged, that is, there is no need to turn on the circulating temperature control device 300.

[0069] 2. When simulating temperatures lower than -1.8°C - 0°C of the polar atmosphere and there are no special test requirements for the sea ice-seawater mixed solution system, there is no need to turn on the circulating temperature control device 300.

[0070] 3. When simulating temperatures higher than 0°C of the polar atmosphere, the seawater is in a non-freezing state, and there is no need to turn on the circulating temperature control device 300.

[0071] 4. When simulating temperatures lower than -1.8°C - 0°C of the polar atmosphere and there are special test requirements for the sea ice-seawater mixed solution system, it is necessary to turn on the circulating temperature control device 300 to ensure that the temperature in the deep water area of the sea ice-seawater mixed solution system remains between -1.8°C and 0°C.

[0072] 5. When conducting a simulation test with broken ice on the water surface while simulating temperatures higher than 0°C of the polar atmosphere, it is necessary to turn on the circulating temperature control device 300 to ensure that the temperature in the deep water area of the sea ice-seawater mixed solution system remains between -1.8°C and 0°C.

[0073] In the present invention, specific examples are used to illustrate the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the method and its core idea of the present invention; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present invention.

Claims

1. A test device for simulating erosion of ship plate steel in polar crushed ice waters, characterized in that: It comprises an ice-water mixed wear test box (100), a rotating sample fixture device (200) and a circulating temperature control device (300); The rotating sample fixture device (200) is installed inside the ice-water mixed wear test box (100), and the rotating sample fixture device (200) comprises a stirring motor (210), and the stirring motor (210) is installed on a stirring support frame (211), and the stirring support frame (211) can be installed on a test barrel (230), and the output shaft of the stirring motor (210) is connected to a rotating sample fixture support (220), and the rotating sample fixture support (220) is connected to a plurality of fixture bodies (222), and the fixture bodies (222) are used to fix the sample, and the bottom surface of the test barrel (230) is installed with a propeller drive motor, and the output shaft of the propeller drive motor is connected to a reverse thrust propeller (240), and the reverse thrust propeller (240) is located inside the test barrel (230); The circulating temperature control device (300) comprises a constant temperature water bath (310) and a circulating temperature control outer barrel (320), the test material barrel (230) is placed inside the circulating temperature control outer barrel (320), and a liquid inlet pipe (311) and a liquid outlet pipe (312) are connected between the constant temperature water bath (310) and the circulating temperature control outer barrel (320).

2. The test equipment for simulating erosion of ship plate steel in polar crushed ice waters according to claim 1, characterized in that: The stirring support frame (211) comprises a support body and four telescopic clamps, wherein a first positioning hole is respectively provided at the four corners of the support body, and a plurality of second positioning holes are spaced apart on the four telescopic clamps, wherein the first positioning hole and the second positioning hole are connected by positioning bolts, and the four telescopic clamps are used to clamp the test barrel (230).

3. The test equipment for simulating erosion of ship plate steel in polar crushed ice waters according to claim 1, characterized in that: The rotating sample clamp support (220) is a cross-shaped part. The four ends of the rotating sample clamp support (220) are respectively connected to a clamp body (222). The clamp body (222) is provided with a plurality of sample slots, which are distributed up and down. Both sides of the sample slots are respectively threadedly connected to a sample fixing bolt (221). The two sample fixing bolts (221) are used to clamp the sample.

4. The test equipment for simulating erosion of ship plate steel in polar crushed ice waters according to claim 1, characterized in that: The ice-water mixed wear test box (100) is a high and low temperature test box.

5. The test equipment for simulating erosion of ship plate steel in polar crushed ice waters according to claim 1, characterized in that: A plurality of reserved holes (110) are provided on the side wall of the ice-water mixed wear test box (100).

6. The test equipment for simulating erosion of ship plate steel in polar crushed ice waters according to claim 1, characterized in that: The inner walls of the ice-water mixed wear test box (100) and the test material barrel (230) are both provided with a non-metallic coating.

7. The test equipment for simulating erosion of ship plate steel in polar crushed ice waters according to claim 1, characterized in that: A flow meter (250) is installed inside the test barrel (230).

8. The test equipment for simulating erosion of ship plate steel in polar crushed ice waters according to claim 1, characterized in that: A temperature sensor (330) is installed inside the test barrel (230).

9. The test equipment for simulating erosion of ship plate steel in polar crushed ice waters according to claim 1, characterized in that: An erosion angle is formed between the clamp body (222) and the tangent direction of the clamp body (222) when the clamp body (222) performs rotational motion, and the erosion angle is 0°-90°.

10. A test method for a test device simulating erosion of ship plate steel in polar crushed ice waters, characterized in that: The test equipment for simulating erosion of ship plate steel in polar crushed ice waters according to any one of claims 1 to 9 comprises the following steps: S1. Check the tightness of the equipment and whether the circuit settings are safe; S2, setting the temperature and humidity of the ice-water mixed wear test box (100), adding artificial seawater into the test material barrel (230), and rotating the reverse thrust propeller (240) so that the heat of the artificial seawater is evenly distributed, and detecting the temperature of the artificial seawater by means of a temperature sensor (330); S3. After the temperature of the artificial seawater in the test barrel (230) is stabilized, the circulating temperature control device (300) is turned on to adjust the temperature of the artificial seawater to between -1.8°C and 0°C; S4, when the temperature of artificial seawater is stabilized between -1.8°C and 0°C, add the prepared ice cubes into the test barrel (230); S5. Select a rotating sample fixture support (220) with different erosion angles according to the specific research part of the hull, install the sample on the fixture body (222), calculate the sailing distance according to the radius, rotation speed and rotation time of the rotating sample fixture support (220), start the stirring motor (210), set the rotation speed of the stirring motor (210), and count the time; S6. After the test, the sample is blown dry and sealed or blown dry for characterization.

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