Test equipment and test method for simulating the erosion of a ship plate steel in polar ice fracture water

Abstract

The application discloses a kind of test equipment and test method for simulating the erosion of ship plate steel in polar ice water area, including ice water mixed abrasion test box, rotating sample clamp device and circulating temperature control device;Rotating sample clamp device is located in ice water mixed abrasion test box, rotating sample clamp device includes stirring motor, stirring motor is installed on stirring support frame, stirring support frame is installed on test material barrel, the output shaft of stirring motor is connected with rotating sample clamp support, rotating sample clamp support is connected with a plurality of clamp bodies, clamp body is used to fix sample, the bottom surface of test material barrel is installed with propeller drive motor, the output shaft of propeller drive motor is connected with counter-thrust power propeller, and counter-thrust power propeller is located inside test material barrel;Circulating temperature control device includes constant-temperature water bath and circulating temperature control outer barrel, and liquid inlet pipe and liquid outlet pipe are connected between constant-temperature water bath and circulating temperature control outer barrel.The application can more accurately control the scouring speed of water to sample.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ice water erosion simulation equipment for steel plates, in particular to a test equipment and test method for simulating the erosion of polar ice water on ship plate steel. BACKGROUND

[0002] Due to the unique nature of the polar region in terms of geopolitics, economy, environment and military, each country attaches great importance to polar resources. Polar ships sail in the summer ice edge zone of the North and South Poles, and the expansion of the North and South Pole route window period has led to an increasing demand for ships to sail in the ice water area. In response to the ice impact in the polar ice water area, polar ship steel plays a very important role in the performance of ships sailing in the polar region: on the one hand, there may be coating peeling during the sailing process of polar ships, which leads to the exposure of the base material, and ice water erosion test plays a key role in the selection of ship plate steel; on the other hand, ice water erosion test of ship plate steel provides scientific basis for subsequent coating development, local strengthening of ship structure and design of new ship structure.

[0003] At present, there are few data on the erosion of polar steel in ice water environment and equipment for simulating polar environment sailing, and it is very difficult to carry out polar marine environment test, and there is no such marine environment in the adjacent sea area of our country, so it is impossible to carry out nearby real sea test. And although the real sea test has the characteristics of true and accurate, but it has the following shortcomings: 1. A large amount of manpower, material resources and financial resources are needed to simulate the ice water environment in the polar region; 2. The tested steel cannot be characterized in time after the test in the polar environment; 3. The testing process is uncontrollable due to the harsh environment. Therefore, it is urgent to develop and design a device to simulate the sailing of ships in the polar ice water area, to fill the gap in this field.

[0004] At present, there are few simulation tests of ice-water erosion in extreme environment in China. On the one hand, the existing equipment for simulating ice-water erosion in polar broken ice area cannot control the test variables such as ice-water ratio, ice shape, sailing speed and sailing mileage, resulting in inaccurate variable control. On the other hand, the equipment is large in size, occupies too much test site space, is high in cost, and is low in automation degree and difficult to operate. At present, the erosion test equipment is mainly divided into three types, including pipe flow type, jet type and rotary type. The patent with application number 201610096668.X mentions a test equipment for simulating metal corrosion in dynamic seawater environment. The equipment is of pipe flow type, which can well control water temperature, but the reproducibility of the broken ice water area navigation test under the condition of ice-water coexistence is not high, and parallel sample determination cannot be carried out. The biggest disadvantage of the pipe flow type equipment is that the erosion speed cannot be accurately controlled, especially for long-period test, the erosion speed on the surface of the sample cannot be stabilized at a specific value. The patent with application number 202011164237.5 mentions a rotary type metal erosion corrosion equipment. The equipment is of rotary type, which relies on water bath temperature control, and there is a phenomenon of uneven heating of the solution, which may eventually cause the barrel wall to freeze. In addition, the equipment does not solve the problem of accurate control of the erosion speed as mentioned in the patent with application number 201610096668.X. The jet type test equipment is relatively common, but it has some problems. On the one hand, for long-period test, a large amount of solid-liquid two-phase solution is needed for jetting. On the other hand, the jet type test equipment cannot accurately control the erosion speed and impact force, and there are many other problems.

[0005] As can be seen from the above prior art, the existing simulation equipment has the problem of being unable to accurately control the erosion speed and impact force.

[0006] Therefore, there is an urgent need in the art for a new test equipment and test method for simulating the erosion of ship plate steel in polar broken ice water area, to solve the above problems. SUMMARY

[0007] The purpose of the present application is to provide a test equipment and test method for simulating the erosion of ship plate steel in polar broken ice water area, to solve the problems existing in the prior art and accurately control the erosion speed and impact force of the sample.

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

[0009] The present application discloses a test equipment for simulating the erosion of ship plate steel in polar broken ice water area, which comprises an ice-water mixed abrasion test box, a rotary sample clamp device and a circulating temperature control device.

[0010] The rotating sample clamp device is installed in the ice-water mixed abrasion test box, the rotating sample clamp device comprises a stirring motor, the stirring motor is installed on a stirring support frame, the stirring support frame can be installed on a test material barrel, an output shaft of the stirring motor is connected with a rotating sample clamp support, the rotating sample clamp support is connected with a plurality of clamp bodies, the clamp bodies are used for fixing samples, a propeller driving motor is installed 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 interior of the test material barrel.

[0011] The circulating temperature control device comprises a constant-temperature water bath and a circulating temperature control outer barrel, the test material barrel is placed in the circulating temperature control outer barrel, and a liquid inlet pipe and a liquid outlet pipe are connected between the constant-temperature water bath and the circulating temperature control outer barrel.

[0012] Preferably, the stirring support frame comprises a support body and four telescopic clamping plates, a first positioning hole is arranged at each corner of the support body, a plurality of second positioning holes are arranged on each of the four telescopic clamping plates, the first positioning hole and the second positioning hole are connected through a positioning bolt, and the four telescopic clamping plates are used for clamping the test material barrel.

[0013] Preferably, the rotating sample clamp support is a cross-shaped piece, one of the clamp bodies is connected to each end of the rotating sample clamp support, a plurality of sample grooves are arranged on the clamp body, the plurality of sample grooves are distributed upwards and downwards, and one sample fixing bolt is threadedly connected to the left side and the right side of each sample groove.

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

[0015] Preferably, a plurality of reserved holes are arranged on the side wall of the ice-water mixed abrasion test box.

[0016] Preferably, a non-metal coating is arranged on the inner walls of the ice-water mixed abrasion test box and the test material barrel.

[0017] Preferably, a flow velocity meter is installed in the interior of the test material barrel.

[0018] Preferably, a temperature sensor is installed in the interior of the test material barrel.

[0019] Preferably, an erosion angle is formed between the tangent direction of the rotating motion of the clamp body and the clamp body, and the erosion angle is 0°-90°.

[0020] The application discloses a test method of a test equipment for simulating ice erosion of ship plate steel in polar ice water area.

[0021] S1, check the sealing of the equipment and whether the circuit setting is safe;

[0022] S2, set the temperature and humidity of the ice water mixed abrasion test box, add artificial seawater in the test barrel, rotate the counter-propeller to make the heat of the artificial seawater uniformly distributed, and detect the temperature of the artificial seawater through the temperature sensor;

[0023] S3, after the temperature of the artificial seawater in the test barrel is stable, start the circulating temperature control device, and adjust the temperature of the artificial seawater to be between-1.8℃ and 0℃;

[0024] S4, after the temperature of the artificial seawater is stable between-1.8℃ and 0℃, add the prepared ice blocks into the test barrel;

[0025] S5, according to the specific ship body research part, select a rotating sample clamp support with different erosion angles, install the sample on the clamp body, calculate the sailing distance according to the radius, rotating speed and rotating time of the rotating sample clamp support, start the stirring motor, set the rotating speed of the stirring motor, and time;

[0026] S6, after the test is completed, the sample is blown dry and sealed or blown dry for characterization.

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

[0028] The present application uses a stirring motor to drive the clamp body and the fixed sample to rotate, and in the process of rotating the sample, the artificial seawater in the test barrel will be washed, so as to simulate the washing effect of real seawater on the ship plate steel. In actual situation, the water flow washing effect caused by only one stirring motor is still different from the washing speed of real seawater, therefore, the present application further adds a counter-propeller, so as to further increase the washing speed and impact degree of the artificial seawater on the sample, so as to be more close to the real situation. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0030] Figure 1 The structure diagram of the test equipment for simulating the erosion of ship plate steel in polar ice water area in embodiment one;

[0031] Figure 2Fig. 1 is a schematic diagram of the appearance of the test equipment for simulating the erosion of ship plate steel in polar ice water for Example 1;

[0032] Figure 3 Fig. 2 is a side view of the test equipment for simulating the erosion of ship plate steel in polar ice water for Example 1;

[0033] Figure 4 Fig. 3 is a schematic diagram of the structure of the rotating sample clamp device in the test equipment for simulating the erosion of ship plate steel in polar ice water for Example 1;

[0034] Figure 5 Fig. 4 is a rotating sample clamp device simulating the bow of a ship in the test equipment for simulating the erosion of ship plate steel in polar ice water for Example 1;

[0035] Figure 6 Fig. 5 is a rotating sample clamp device simulating the midship of a ship in the test equipment for simulating the erosion of ship plate steel in polar ice water for Example 1;

[0036] Figure 7 Fig. 6 is a connection diagram of the circulating temperature control device in the test equipment for simulating the erosion of ship plate steel in polar ice water for Example 1;

[0037] Figure 8 Fig. 7 is a schematic diagram of the inside of the test material barrel in the test equipment for simulating the erosion of ship plate steel in polar ice water for Example 1;

[0038] In the figure: 100 - ice water mixed abrasion test box; 110 - reserved hole; 200 - rotating sample clamp device; 210 - stirring motor; 211 - stirring support frame; 220 - rotating sample clamp support; 221 - sample fixing bolt; 222 - clamp body; 230 - test material barrel; 240 - counter-propulsion propeller; 250 - flow meter; 300 - circulating temperature control device; 310 - constant temperature water bath; 311 - liquid inlet pipe; 312 - liquid outlet pipe; 320 - circulating temperature control outer barrel; 330 - temperature sensor. DETAILED DESCRIPTION

[0039] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0040] The purpose of the present application is to provide a test equipment and method for simulating the erosion of ship plate steel in polar ice water, to solve the problems existing in the prior art, and to accurately control the scouring speed and impact force of the sample.

[0041] To make the above-mentioned 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] Example 1

[0043] like Figures 1-8 As shown, this embodiment provides a test device for simulating the erosion of ship plate steel in polar ice water, including an ice-water mixed abrasion test chamber 100, a rotating sample clamp device 200, and a circulating temperature control device 300.

[0044] A rotating sample clamp device 200 is installed inside the ice-water mixing abrasion test chamber 100. The rotating sample clamp device 200 includes a stirring motor 210, which is screwed onto a stirring support frame 211. The stirring support frame 211 can be installed on the test material container 230. The output shaft of the stirring motor 210 is connected to a rotating sample clamp bracket 220, and the output shaft of the stirring motor 210 is located at the center of the rotating sample clamp bracket 220. Several clamp bodies 222 are connected around the rotating sample clamp bracket 220, and the clamp bodies 222 are used to fix the sample. A propeller drive motor is installed on the outer bottom surface of the test material container 230. To prevent the propeller drive motor from contacting the circulating solution, a protective cover can be installed on the outside of the propeller drive motor to isolate it. The output shaft of the propeller drive motor passes through the bottom of the test material container 230 and is connected to a counter-propeller 240, which is located inside the lower part of the test material container 230.

[0045] The circulating temperature control device 300 comprises a constant temperature water bath box 310 and a circulating temperature control outer barrel 320. The constant temperature water bath box 310 is located outside the ice-water mixed abrasion test box 100, and the circulating temperature control outer barrel 320 is located inside the ice-water mixed abrasion test box 100. The test material barrel 230 is placed inside the circulating temperature control outer barrel 320. The constant temperature water bath box 310 and the circulating temperature control outer barrel 320 are connected with a liquid inlet pipe 311 and a liquid outlet pipe 312. The constant temperature water bath box 310 is a prior art, and its structure will not be described here. Its general working principle is that the constant temperature water bath box 310 can heat or cool the circulating solution. Then the heated or cooled circulating solution in the constant temperature water bath box 310 is transported to the annular space between the circulating temperature control outer barrel 320 and the test material barrel 230 through the liquid inlet pipe 311, so as to heat exchange the artificial seawater in the test material barrel 230, so that the artificial seawater is in a constant temperature state. The heat-exchanged circulating solution flows out from the liquid outlet pipe 312 and flows into the constant temperature water bath box 310 again for cooling or heating (depending on the test requirement), thereby completing a cycle. The opening of the circulating temperature control device 300 is applied to simulate the polar environment below the freezing point of seawater or above the freezing point of seawater, and has special requirements for ice-water ratio, ice shape and other test variables. The circulating solution in the constant temperature water bath box 310 is selected according to the simulated environment temperature for low-temperature environment test. The freezing temperature of the selected circulating solution should be lower than the test temperature to prevent freezing. For high-temperature environment test, the selected circulating solution should have a vaporization temperature higher than the test temperature to prevent volatilization. Generally, the circulating solution is alcohol.

[0046] For some special test conditions, such as simulating the polar atmospheric temperature below-1.8℃-0℃, the solution system cannot control the ice-water ratio, ice shape and other special test variables. Research from the nature, because the ice forming temperature of the solution system needs to be as low as-1.8℃ or so (i.e. the freezing point of seawater is about-1.8℃). When seawater freezes, salt is gradually precipitated with the growth of ice age. The thousand-year ice in the polar environment is pure water ice, and the melting point of pure water ice is 0℃. In order to ensure that the ice does not melt and the seawater does not freeze, the technical scheme proposed by the present application is:

[0047] The temperature of the solution system is maintained at the freezing point of the sea ice-seawater mixture using an external circulating temperature control device 300 in the test tank 230. Extensive experimental results for specific experimental needs indicate that atmospheric temperature only controls the interface between the seawater-sea ice mixture and the air. Because ice density is less than seawater density, the ice floats on the surface of the artificial seawater. Low atmospheric temperature does not affect experimental variables such as ice shape and ice-to-water ratio. Furthermore, in real-world environments, water flow keeps the deep water area non-freezing; that is, the deep water temperature must be higher than the solution surface temperature and greater than or equal to the freezing point temperature. Therefore, the temperature in the deep water area needs to be controlled near the freezing point to ensure that the seawater does not freeze and affect the surface ice-to-water ratio. The deep water temperature is controlled at approximately -1.8℃ to 0℃ (set according to specific experimental requirements), and the surface temperature (i.e., the temperature of the ice floating on the surface) is the atmospheric temperature, adjusted according to the actual environmental conditions.

[0048] In actual use, artificial seawater is first added to the test material tank 230, and the constant temperature water bath 310 is started to supply circulating solution to the circulating temperature-controlled outer tank 320. Simultaneously, the sample is mounted on the fixture body 222 and inserted into the test material tank. The stirring motor 210 is started, causing the sample to rotate in the artificial seawater to simulate ship navigation, while the artificial seawater washes over the sample. However, relying solely on the stirring motor 210, the washing effect of the artificial seawater on the sample still differs somewhat from reality. At this point, the propeller drive motor can be turned on, causing it to drive the counter-propeller 240 to rotate. The counter-propeller 240 rotates in the opposite direction to the stirring motor 210 (or the fixture body 222) but at the same speed, thereby further enhancing the washing speed and force of the artificial seawater on the sample, making it more closely resemble real-world conditions.

[0049] In this embodiment, as Figure 4 As shown, the stirring support frame 211 has an overall "I"-shaped structure. Specifically, the stirring support frame 211 includes a support body and four telescopic clamps. The four telescopic clamps are respectively installed at the four corners of the support body, which is a rectangular plate located in the middle for fixing the stirring motor 210. Each of the four corners of the support body has a first positioning hole, and each of the four telescopic clamps has several second positioning holes spaced apart. The first and second positioning holes are connected by positioning bolts. That is, the positioning bolts pass through the first and second positioning holes in sequence and are threaded into the corresponding nuts to fix the support body to the telescopic clamps. When the first positioning hole corresponds to different second positioning holes, the extension length of the telescopic clamps is also different, thus clamping test material barrels 230 of different sizes. Furthermore, to facilitate better clamping of the test material barrels 230 by the four telescopic clamps, the telescopic clamps are designed with an L-shaped structure. The horizontal side has a second positioning hole and connects to the support body, while the vertical side is used to clamp the outer wall of the test material barrel 230.

[0050] In the embodiment, the rotating sample clamp support 220 is a cross-shaped member, and four clamp bodies 222 are arranged at four ends of the rotating sample clamp support 220. The clamp body 222 is provided with a plurality of sample grooves, and the plurality of sample grooves are arranged in an up-down manner. Specifically, the sample grooves are three rectangular grooves with the same size. It should be noted that the plurality of sample grooves are arranged to provide different installation positions for the sample at different heights, so as to simulate the ice-water erosion process at different depths of the ship body.

[0051] Two sample fixing bolts 221 are threadedly connected to the two sides of each sample groove, and the two sample fixing bolts 221 are used to clamp the sample. The sample is a steel plate structure used for a ship plate. The sample fixing bolt 221 is used to fix the steel plate, because the gap between the two sample fixing bolts 221 can be adjusted by loosening or tightening the sample fixing bolt 221, so as to clamp the sample with different sizes.

[0052] The circulating temperature control outer barrel 320 is sleeved outside the test material barrel 230. Since the barrel wall of the test material barrel 230 is preferentially heated, the diameter of the rotating sample clamp support 220 should be as same as the diameter of the test material barrel 230 as possible (or the clamp body 222 should be as close to the inner wall of the test material barrel 230 as possible), so as to ensure that the solution system is fully stirred and the heat is uniformly distributed.

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

[0054] In the embodiment, the ice-water mixed wear test box 100 is provided with a plurality of reserved holes 110 on the side wall, and each reserved hole 110 is used for the liquid inlet pipe 311, the liquid outlet pipe 312 and the wire to pass through. In order to further improve the sealing performance of the reserved hole 110, a sealing ring can be installed when the liquid inlet pipe 311 and the liquid outlet pipe 312 pass through the reserved hole 110, so as to seal the gap between each pipe and the reserved hole 110, and slow down the heat exchange efficiency between the inside and the outside of the ice-water mixed wear test box 100.

[0055] In the embodiment, the inner walls of the ice-water mixed wear test box 100 and the test material barrel 230 are provided with a non-metal coating, and the non-metal coating can be an existing epoxy zinc-rich primer. On the one hand, the epoxy zinc-rich primer can prolong the service life of the ice-water mixed wear test box 100 due to liquid splashing. On the other hand, the ice-water mixed wear test box 100 and the test material barrel 230 are prevented from being subjected to galvanic corrosion in a wet environment, so as to ensure the test accuracy.

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

[0057] In this embodiment, the temperature sensor 330 is installed inside the test barrel 230 to monitor the temperature of the artificial seawater. It is noted that the ice-water mixed abrasion test box 100, the constant-temperature water bath box 310, the stirring motor 210, the propeller driving motor, and other devices are electrically connected to the control device, and the operation of each device is controlled by the control device. The flow rate meter 250 and the temperature sensor 330 are also electrically connected to the control device, and the flow rate meter 250 and the temperature sensor 330 transmit the flow rate signal and the temperature signal to the control device in real time. The control device sends corresponding control signals to the corresponding devices (such as the stirring motor 210, the propeller driving motor, and the constant-temperature water bath box 310) according to the relevant data to control their work. The control device can be a current industrial computer or a background host computer.

[0058] In this embodiment, the erosion angle between the tangential direction of the rotation of the clamp body 222 and the clamp body 222 is 0°-90°. Specifically, as shown in Figures 4-6 Figure 4 and Figure 5 is an embodiment, Figure 6 is another. As can be seen from Figure 5 and Figure 6 , the end of the rotating sample clamp support 220 is not the same, and the inclination angle, i.e., the angle of the plane in which the clamp body 222 is located, can be customized according to actual needs. The purpose is to simulate the ice-water erosion process of the bow to the stern of the ship during navigation in the ice-water area.

[0059] Embodiment Two

[0060] The present embodiment provides a test method for a test device for simulating the erosion of ship plate steel in the polar ice-water area. Based on the test device for simulating the erosion of ship plate steel in the polar ice-water area disclosed in Embodiment One, the test method comprises the following steps:

[0061] S1, check the safety of the sealing and circuit setting of the equipment (such as the ice-water mixed abrasion test box 100 and the constant-temperature water bath box 310).

[0062] S2, set the temperature and humidity of the ice-water mixed abrasion test box 100, add artificial seawater to the test barrel 230, and rotate the artificial seawater through the reverse thrust propeller 240 to evenly distribute the heat of the artificial seawater. The temperature of the artificial seawater is detected by the temperature sensor 330.

[0063] ​S3, after the temperature of the artificial seawater in the test barrel 230 is stabilized, the circulating temperature control device 300 is started, and the temperature of the artificial seawater is adjusted to be between -1.8℃ and 0℃.

[0064] S4, after the temperature of the artificial seawater is stabilized between -1.8℃ and 0℃, ice blocks prepared are added to the test barrel 230, and the ice-water ratio (ice amount), ice shape, ice particle size and other variables are considered.

[0065] S5, according to the specific ship body research part, a rotating sample clamp support 220 with different erosion angles is selected, the sample is installed on the clamp body 222, the sailing distance is calculated according to the radius, rotating speed and rotating time of the rotating sample clamp support 220, the stirring motor 210 is started, the rotating speed of the stirring motor 210 is set, and the time is counted.

[0066] S6, after the test is completed, the sample is dried and sealed or dried for characterization, and the erosion morphology and rust layer composition of the sample surface can be characterized by relying on CLSM, SEM, EDS and other detection means.

[0067] For the simulation of the polar atmospheric temperature being lower than or higher than -1.8℃-0℃, whether to start the circulating temperature control device 300 has the following five points:

[0068] 1. When the simulated polar atmospheric temperature is about -1.8℃-0℃, the ice-water ratio and ice shape of the sea ice-seawater mixed solution remain unchanged, that is, the circulating temperature control device 300 does not need to be started.

[0069] 2. When the simulated polar atmospheric temperature is lower than -1.8℃-0℃ and there is no special test requirement for the sea ice-seawater mixed solution system, the circulating temperature control device 300 does not need to be started.

[0070] 3. When the simulated polar atmospheric temperature is higher than 0℃, the seawater is in a non-icing state, and the circulating temperature control device 300 does not need to be started.

[0071] 4. When the simulated polar atmospheric temperature is lower than -1.8℃-0℃ and there is a special test requirement for the sea ice-seawater mixed solution system, the circulating temperature control device 300 needs to be started to ensure that the temperature of the sea ice-seawater mixed solution system in the deep water area is maintained at -1.8℃-0℃.

[0072] 5. When the simulated polar atmospheric temperature is higher than 0℃ and there is ice on the water surface, the circulating temperature control device 300 needs to be started to ensure that the temperature of the sea ice-seawater mixed solution system in the deep water area is maintained at -1.8℃-0℃.

[0073] The principles and implementation manners of the present application are described by using specific examples in the present application, and the above examples are only used for helping to understand the method of the present application and its core idea; meanwhile, for the general technical personnel in the art, according to the idea of the present application, the specific implementation manners and application ranges will be changed. In conclusion, the content of the present specification should not be understood as the limitation of the present application.

Claims

1. A test apparatus for simulating the erosion of a ship plate steel in polar ice crushing waters, characterised in that: The ice water mixed abrasion test box (100), the rotating sample clamp device (200) and the circulating temperature control device (300) are included. The rotating sample clamp device (200) is installed in the ice water mixed abrasion test box (100), and the rotating sample clamp device (200) includes a stirring motor (210) installed on a stirring support frame (211), the stirring support frame (211) can be installed on a test material barrel (230), the output shaft of the stirring motor (210) is connected with a rotating sample clamp support (220), the rotating sample clamp support (220) is connected with a plurality of clamp bodies (222), the clamp bodies (222) are used for fixing samples, the bottom surface of the test material barrel (230) is provided with a propeller drive motor, the output shaft of the propeller drive motor is connected with a counter-thrust propeller (240), and the counter-thrust propeller (240) is located in the inside of the test material barrel (230). The circulating temperature control device (300) includes a constant temperature water bath box (310) and a circulating temperature control outer barrel (320), the test material barrel (230) is placed in the circulating temperature control outer barrel (320), and the constant temperature water bath box (310) and the circulating temperature control outer barrel (320) are connected with a liquid inlet pipe (311) and a liquid outlet pipe (312). The rotating sample clamp support (220) is a cross-shaped piece, four ends of the rotating sample clamp support (220) are respectively connected with one of the clamp bodies (222), a plurality of sample grooves are arranged on the clamp bodies (222), the plurality of sample grooves are distributed above and below, and two sample fixing bolts (221) are respectively threadedly connected on the two sides of the sample grooves. The ice water mixed abrasion test box (100) is a high-low temperature test box. The circulating temperature control device (300) can adjust the temperature of artificial seawater in the test material barrel (230) to be between-1.8℃ and 0℃.

2. The test equipment for simulating the erosion of a ship plate steel in polar ice- breaking waters according to claim 1, characterized in that: The stirring support frame (211) includes a support body and four telescopic clamping plates, a first positioning hole is arranged at each corner of the support body, a plurality of second positioning holes are arranged on the four telescopic clamping plates, the first positioning hole and the second positioning hole are connected through a positioning bolt, and the four telescopic clamping plates are used for clamping the test material barrel (230).

3. The simulated ship plate steel in polar icebreaker water erosion test equipment according to claim 1, characterized in that: A plurality of reserved holes (110) are arranged on the side wall of the ice water mixed abrasion test box (100).

4. The simulated ship plate steel in polar icebreaker water erosion test equipment according to claim 1, characterized in that: Non-metallic coatings are arranged on the inner walls of the ice water mixed abrasion test box (100) and the test material barrel (230).

5. The simulated ship plate steel in polar icebreaker water erosion test equipment according to claim 1, characterized in that: A flow velocity meter (250) is installed in the test material barrel (230).

6. The simulated ship plate steel in polar icebreaker water erosion test equipment according to claim 1, characterized in that: A temperature sensor (330) is installed in the test material barrel (230).

7. The simulated ship plate steel in polar icebreaker water erosion test equipment according to claim 1, characterized in that: An erosion angle is formed between the tangent direction of the rotating motion of the clamp body (222) and the clamp body (222), and the erosion angle is 0°-90°.

8. A test method for a test apparatus simulating the erosion of a ship plate steel in polar ice crushing waters, characterized in that, The simulation ship plate steel according to any one of claims 1-7 is used in an ice-water mixed abrasion test box (100) for polar ice water area erosion test, comprising the following steps: S1, checking the sealing property of the equipment and whether the circuit setting is safe; S2, setting the temperature and humidity of the ice-water mixed abrasion test box (100), adding artificial seawater in the test barrel (230), rotating the artificial seawater through the reverse thrust propeller (240) to make the heat of the artificial seawater evenly distributed, and detecting the temperature of the artificial seawater through the temperature sensor (330); S3, after the temperature of the artificial seawater in the test barrel (230) is stable, starting the circulating temperature control device (300) to adjust the temperature of the artificial seawater to be between -1.8℃ and 0℃; S4, after the temperature of the artificial seawater is stabilized between -1.8℃ and 0℃, adding the prepared ice blocks into the test barrel (230); S5, selecting the rotating sample clamp support (220) with different erosion angles according to the specific ship body research part, installing the sample on the clamp body (222), calculating the sailing distance according to the radius, rotating speed and rotating time of the rotating sample clamp support (220), starting the stirring motor (210), setting the rotating speed of the stirring motor (210), and timing; S6, after the test is completed, the sample is blown dry and sealed or blown dry for characterization.

Images