Test device and test method for simulating sea wave etching environment

Abstract

The invention discloses a test device and a test method for simulating a sea wave etching environment, and relates to the technical field of environment test and observation.The test device comprises a box body which is used for containing seawater and a sample and is of a sealed structure; the stirring blade is used for stirring seawater in the box body to generate simulated sea waves, the inner bottom of the box body is arranged, and one end of a driving shaft for driving the stirring blade extends out of the box body and is connected with the output end of the driving device; the bracket is used for fixing a sample, the bracket is arranged in the box body, the bracket is positioned above the stirring blades, and a water permeable channel is arranged on the bracket. The real sea wave impact effect and the real seawater splashing effect can be restored. The liquid level height of seawater in the box body can be adjusted, and the real effects of a total immersion area, a quasi tidal range area and a splashing area are achieved. The driving device is arranged on the outer side of the box body and is not affected by seawater. The test method for simulating the sea wave etching environment is based on the test device for simulating the sea wave etching environment.

Description

Technical Field

[0001] The present invention relates to the technical field of environmental testing and observation, and particularly to a test device and a test method for simulating a sea wave erosion environment. Background Art

[0002] Seawater is a very complex multi-component aqueous solution, containing a large amount of dissolved inorganic salts, organic substances, and microorganisms secreting acidic substances. Therefore, marine equipment in operation will be subject to electrochemical corrosion and microbial erosion. In addition, the sea waves formed by the ebb and flow tides have mechanical impacts on marine equipment, and the seawater splashed onto the marine equipment after splashing will also act together with the oxygen in the air to erode the marine equipment. The installation area of marine equipment can be subdivided into the fully immersed area, the tidal range area, and the splash area. Among them, the fully immersed area refers to the part of the marine equipment that is always immersed in seawater. The corrosion of this part is affected by the dissolved oxygen content, salt concentration, flow rate, water temperature, marine organisms, pH value, and quicksand in the sea. The tidal range area is the part that is immersed underwater during high tide and above the waterline during low tide. Theoretically, due to the uneven supply of oxygen in the sea level, an oxygen concentration difference is caused above and below the water surface, and a large oxygen concentration difference cell is formed above and below the waterline. The part with the most sufficient oxygen supply in the air is the cathode protection, and the corrosion is relatively small. The part just immersed below the seawater line is the anode, and the corrosion is extremely serious. The splash area generally refers to the part 0-2 meters above the sea level, which is often affected by the impact of seawater wave droplets. Since the supply of oxygen in the splash area is very sufficient, the depolarization effect of oxygen promotes the corrosion of metals. At the same time, the impact of the waves will strongly damage the protective layer on the surface of the marine equipment. Therefore, the seawater erosion test of marine equipment is an indispensable link in the design and manufacture of marine equipment.

[0003] As known to the inventor, the current main methods for seawater erosion tests of marine equipment are the dry-wet alternate test method and the periodic spray cycle corrosion test method. In the dry-wet alternate test method, a seawater container with an open top is set up, and a group of rotating crankshafts are arranged in parallel near the water-vapor interface. When the rotating crankshafts are driven by a motor, the test pieces fixed on both sides of the convex and concave parts of the crankshaft can form a vertical displacement relative to the water surface line, and the samples are in two dry-wet alternate states of seawater immersion or exposure to the air, and then corrosion occurs. The dry-wet alternate test method alternates the test pieces between the two states of seawater immersion and exposure to the air by rotating the crankshaft. When the crankshaft speed is low, it is difficult to form a splashing state. If the crankshaft speed is too high, the corrosion products will be washed away, which is not conducive to the formation of the corrosion layer in the long-term corrosion test. Moreover, since the upper opening of the container is open, the seawater evaporation area is large, which not only corrodes the samples, but also has a great impact on adjacent components such as motors, transmission gears, and control switches. Therefore, these parts have to use materials and devices with excellent weather resistance. In the periodic spray cycle corrosion test method, a set of containers for holding seawater, as well as pipelines, seawater pumps, spray heads, valve bodies, and seawater recovery systems connected to the containers are set up. By setting a program time control switch, seawater is intermittently sprayed onto the test pieces, so that the test pieces are in a dry-wet alternate state and then corrosion occurs. The periodic spray cycle corrosion test method makes the test pieces in a dry-wet alternate state through intermittent spraying, but the drying time is long, resulting in an extension of the total test cycle. And the salt mist particle size formed by spraying is single, which does not conform to the fine droplet-shaped salt mist of different sizes formed by actual wave splashing. At the same time, although the container for holding seawater is sealed, components such as pipelines, seawater pumps, spray heads, valve bodies, and seawater recovery systems are all in direct contact with seawater, and the seawater corrosion resistance design is complex. The weather resistance is positively correlated with the price. The higher the weather resistance requirement, the higher the cost.

[0004] Therefore, there is a need for a test device and a test method that can correctly simulate the seawater state in the tidal difference area and the splash area, restore the real seawater corrosion environment, improve the test reliability, and reduce the test cost. Summary of the Invention

[0005] The purpose of the present invention is to provide a test device for simulating a wave erosion environment to solve the problems existing in the above-mentioned prior art and restore the real wave impact effect and seawater splash effect. The height of the seawater liquid level in the box body can be adjusted to achieve the effects of the real fully immersed area, the simulated tidal difference area, and the splash area. The driving device is arranged outside the box body and will not be affected by seawater.

[0006] The present invention also provides a test method for simulating a wave erosion environment. Based on the above test device for simulating a wave erosion environment, its technical effects will not be elaborated here.

[0007] To achieve the above purpose, the present invention provides the following solutions:

[0008] The present invention provides a test device for simulating a wave erosion environment, characterized in that it includes:

[0009] A box body for containing seawater and specimens, and the box body is a sealed structure;

[0010] A stirring paddle for stirring the seawater in the box body to generate simulated waves. The stirring paddle is arranged at the inner bottom of the box body, and one end of the drive shaft driving the stirring paddle extends out of the box body and is connected to the output end of the driving device;

[0011] A bracket for fixing the specimens. The bracket is arranged in the box body, above the stirring paddle, and a water permeable channel is arranged on the bracket.

[0012] In one embodiment, the box body includes a detachable top cover.

[0013] In one embodiment, the box body includes a lower box body and an upper box body. The top of the lower box body communicates with the bottom of the upper box body. The stirring paddle is arranged at the inner bottom of the lower box body, and the bracket is arranged in the upper box body.

[0014] In one embodiment, the driving device includes an electric motor, and the output end of the electric motor is connected to one end of the drive shaft extending out of the box body.

[0015] In one embodiment, the driving device is arranged outside and below the box body.

[0016] In one embodiment, the box body is a transparent box body.

[0017] In one embodiment, the driving device is arranged outside and above the box body, and a box body rotating platform is arranged at the outer bottom of the box body. The box body is rotationally connected to the box body rotating platform through a rotating shaft.

[0018] In one embodiment, the bracket is a frame structure, and the hollow position inside the frame structure is the water permeable channel.

[0019] In one embodiment, the bracket is a ceramic bracket.

[0020] The present invention also provides a test method for simulating a wave erosion environment. Based on the above test device for simulating a wave erosion environment, it includes the following steps:

[0021] S1. Fix and place the specimens on the bracket;

[0022] S2. Add seawater into the box body, and stop adding when the liquid level height of the seawater reaches the specified position;

[0023] S3. Start the driving device to create simulated ocean waves inside the box.

[0024] The present invention has achieved the following technical effects compared with the prior art:

[0025] The present invention provides a test device for simulating an ocean wave erosion environment, which places seawater and a specimen in a sealed box, uses a stirring paddle to create simulated ocean waves, and restores the real ocean wave impact effect and seawater splashing effect. The height of the seawater level inside the box can be adjusted, and the specimen can be non-contact, partially in contact with, or completely immersed in seawater, achieving the effects or combinations of effects in the real splash zone, tidal range zone, and fully immersed zone. The driving device is arranged outside the box, and only part of the drive shaft is inside the box, so the driving device will not be affected by seawater.

[0026] The present invention also provides a test method for simulating an ocean wave erosion environment. Based on the above test device for simulating an ocean wave erosion environment, the technical effects will not be elaborated here.

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

[0028] 1. In the present invention, a detachable top cover is provided on the top of the box. After removing the top cover, devices or test materials such as the bracket, specimen, and seawater can be placed into the box from the top, which is convenient and reliable.

[0029] 2. In the present invention, the box is divided into an upper box and a lower box. The bottom surface of the upper box is connected to the top surface of the lower box. The impact and splash areas of the simulated ocean waves can be adjusted by changing the bottom surface size of the upper box and the top surface size of the lower box. When conducting multi-specimen tests, the test conditions of different specimens can be controlled to form a comparison.

[0030] 3. In the present invention, the driving device can be arranged outside and below the box, greatly shortening the length of the drive shaft immersed in seawater, reducing the loss of the drive shaft, and lowering the test cost.

[0031] 4. In the present invention, the box is a transparent box, which can meet the need for real-time observation during the test, and there is no need to wait until the test is over to take out the specimen for observation.

[0032] 5. In the present invention, a box rotating platform is provided below the transparent box. The box is connected to the rotating platform through a rotating shaft. The rotation of the box can meet the need to observe the test process from different angles. The driving device is adjusted to the outside and above the box, which will not affect the normal progress of the test.

[0033] 6. In the present invention, a bracket with a frame structure can be used. The hollow positions inside the frame structure are water-permeable channels. The layout of the frame structure is flexible. While meeting the requirement of fixing the specimen, a relatively large hollow area can be formed. The bracket itself will not hinder the movement of the simulated ocean waves, ensuring the impact effect of the simulated ocean waves on the specimen and the seawater splashing effect. Brief Description of the Drawings

[0034] 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 described below are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0035] Figure 1 Schematic structural diagram of a test device with a driving device arranged on the outer lower surface of a box body in an embodiment of the present invention;

[0036] Figure 2 Schematic structural diagram of a test device with a driving device arranged on the outer upper surface of a box body in an embodiment of the present invention;

[0037] Figure 3 Schematic structural diagram of a test device with the bottom surface size of an upper box body larger than the top surface size of a lower box body in an embodiment of the present invention;

[0038] Figure 4 Schematic structural diagram of a test device with the bottom surface size of an upper box body smaller than the top surface size of a lower box body in an embodiment of the present invention;

[0039] Figure 5 Schematic diagram of the setting of a bracket in an embodiment of the present invention.

[0040] Wherein, 1. Box body; 101. Lower box body; 102. Upper box body; 2. Stirring paddle; 3. Driving shaft; 4. Driving device; 5. Bracket; 6. Top cover; 7. Box body rotating platform; 8. Rotating shaft; 9. Specimen. Detailed Embodiments

[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Those familiar with this technology can easily understand other advantages and effects of the present invention from the content disclosed in this specification. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0042] It should be noted that the structures, proportions, sizes, etc. depicted in the attached drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present invention can be implemented. Therefore, they do not have any technical essence. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. In the description of the present invention, it is necessary to understand that

[0043] the orientation or positional relationship is based on the orientation or positional relationship shown in the attached drawings. It is only for the convenience of describing the present invention, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation to the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present invention, unless otherwise stated, the meaning of "a plurality" is two or more.

[0044] It should also be noted that in the embodiments of the present application, the same reference numerals are used to represent the same components or the same parts.

[0045] The purpose of the present invention is to provide a test device for simulating the sea wave erosion environment to solve the problems existing in the prior art. The seawater and the specimen are placed in a sealed box body, and a stirring paddle is used to create simulated sea waves to restore the real sea wave impact effect and the seawater splash effect. The height of the seawater liquid level in the box body can be adjusted, and the specimen can be non-contact, partially in contact with, or completely immersed in the seawater to achieve the effects or combinations of effects in the real splash zone, tidal range zone, and full immersion zone. The driving device is arranged outside the box body, and only part of the driving shaft is inside the box body, so the driving device will not be affected by the seawater.

[0046] The present invention also provides a test method for simulating the sea wave erosion environment. Based on the above test device for simulating the sea wave erosion environment, its technical effects will not be elaborated here.

[0047] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be further described in detail below with reference to the attached drawings and specific embodiments.

[0048] As Figure 1 and Figure 2 shown, the present invention provides a test device for simulating the sea wave erosion environment, including:

[0049] The box body 1 is used to hold seawater and the specimen 9, and the box body 1 is a sealed structure; the stirring paddle 2 is used to stir the seawater in the box body 1 to generate simulated ocean waves. The stirring paddle 2 is arranged at the inner bottom of the box body 1, and one end of the driving shaft 3 that drives the stirring paddle 2 extends out of the box body 1 and is connected to the output end of the driving device 4; the bracket 5 is used to fix the specimen 9. The bracket 5 is arranged in the box body 1, the bracket 5 is located above the stirring paddle 2, and a water permeable channel is arranged on the bracket 5. Seawater is directly poured into the box body 1, and the amount of seawater can be determined according to the scenario to be simulated. The specimen 9 can be not in contact with, partially in contact with, or completely immersed in the seawater to simulate the splash zone, tidal range zone, and fully immersed zone. The working intensity of the stirring paddle 2 is adjustable, and simulated ocean waves with different intensities can be generated. Under the condition of simulating the fully immersed zone, the stirring paddle 2 can push the seawater to move to simulate the water body flow under the sea surface. The box body 1 is a sealed structure, so the seawater will not evaporate outward. The driving device 4 is arranged outside the box body 1, does not contact the seawater or salty vapor, and will not be eroded.

[0050] In one embodiment, a flange for fixing the bracket 5 is arranged on the inner wall of the box body 1.

[0051] As Figure 1 and 2 shown, the box body 1 includes a detachable top cover 6. After removing the top cover 6, devices or test materials such as the bracket 5, the specimen 9, and seawater can be put into the box body 1 from the top, which is convenient and reliable.

[0052] As Figure 3 and Figure 4 shown, the box body 1 includes a lower box body 101 and an upper box body 102. The top of the lower box body 101 is communicated with the bottom of the upper box body 102. The stirring paddle 2 is arranged at the inner bottom of the lower box body 101, and the bracket 5 is arranged in the upper box body 102. The bottom surface of the upper box body 102 is communicated with the top surface of the lower box body 101. The impact and splash areas of the simulated ocean waves can be adjusted by changing the bottom surface size of the upper box body 102 and the top surface size of the lower box body 101. When conducting the test, the test conditions of different specimens 9 can be controlled to form a comparison, or multiple specimens 9 can be made to contact the simulated ocean waves with the same intensity simultaneously to conduct a single-intensity ocean wave test on multiple specimens 9, improving the reliability of the test conclusion, and the intensity of the simulated ocean waves can be changed by adjusting the output intensity of the driving device 4.

[0053] As Figure 3 shown, in one embodiment, the bottom surface size of the upper box body 102 is larger than the top surface size of the lower box body 101. The generation area of the simulated ocean waves is smaller than the arrangement area of the specimen 9, and the impact and splash effects received by different specimens 9 are different, forming a comparison.

[0054] As Figure 4As shown, in one embodiment, the bottom surface size of the upper box body 102 is smaller than the top surface size of the lower box body 101. The simulated sea wave generation area is larger than the arrangement area of the specimen 9. The specimen 9 can be placed at any position on the bracket 5 to be impacted by a complete and equal-strength simulated sea wave, ensuring the reliability of a single-effect test.

[0055] In one embodiment, the driving device 4 includes a motor, and the output end of the motor is connected to one end of the driving shaft 3 that extends out of the box body 1.

[0056] As Figure 1 shown, in one embodiment, the driving device 4 is arranged below the outer side of the box body 1. The driving shaft 3 extends out from the bottom of the box body 1 and is connected to the output end of the driving device 4. The length of the driving shaft 3 is short, with high power conversion efficiency, and it can provide a relatively high rotational speed at the same time, being more suitable for simulating the splash zone and the tidal difference zone with less water volume.

[0057] In one embodiment, the box body 1 is a transparent box body. The transparent box body can meet the need for real-time observation. During the test, the tester can directly and continuously observe, make real-time records, and can also promptly discover problems in the test and interrupt the test process in time, without having to wait until the end of the test to make observations.

[0058] As Figure 4 shown, in one embodiment, the driving device 4 is arranged above the outer side of the box body 1, and a box body rotating platform 7 is arranged at the outer bottom of the box body 1. The box body 1 is rotationally connected to the box body rotating platform 7 through a rotating shaft 8. The box body 1 can rotate around the rotating shaft 8 to adjust the observation direction. Since the driving device 4 is arranged above the outer side of the box body 1, the length of the driving shaft 3 is increased. Although the rotational speed provided is lower than that of the short shaft, the long shaft can provide a greater torque, being more suitable for simulating the fully immersed zone or the tidal difference zone with a larger water volume.

[0059] In one embodiment, the bracket 5 is of a frame structure, and the hollow position inside the frame structure is a water permeable channel. As Figure 5 shown, the bracket 5 is formed by enclosing four support plates, and a water permeable channel is formed in the middle of the support plates. The edge of the specimen 9 is fixed on the support plates, and the main body of the specimen 9 is located above the water permeable channel.

[0060] In one embodiment, the shape of the bracket 5 is the same as the top view shape inside the box body 1, and the bracket 5 is arranged against the inner wall of the box body 1.

[0061] In one embodiment, corresponding bolt holes are respectively arranged on the specimen 9 and the bracket 5, and the specimen 9 is fixed on the bracket 5 through bolts.

[0062] In one embodiment, the specimen 9 is strapped to the bracket 5.

[0063] In one embodiment, the bracket 5 is a ceramic bracket.

[0064] In one embodiment, a temperature monitoring device and a humidity monitoring device are arranged inside the box body 1.

[0065] The present invention also provides a test method for simulating a wave erosion environment. Based on the above test device for simulating a wave erosion environment, the method includes the following steps:

[0066] S1. Fix and place the specimen 9 on the bracket 5;

[0067] S2. Add seawater into the box body 1, and stop adding when the liquid level height of the seawater reaches the specified position;

[0068] S3. Start the driving device 4 to create simulated waves inside the box body 1.

[0069] In one embodiment, step S2 further includes adding appropriate sediment.

[0070] In the description of the present application, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0071] If the present invention discloses or involves components or structural parts that are fixedly connected to each other, then, unless otherwise stated, the fixed connection can be understood as: a detachable fixed connection (for example, connected by bolts or screws), or it can be understood as: a non-detachable fixed connection (for example, riveting, welding). Of course, the mutual fixed connection can also be replaced by an integral structure (for example, manufactured by an integral casting process) (except when it is clearly impossible to adopt the integral forming process).

[0072] In addition, in any technical solution disclosed in the present invention above, the terms used to represent the positional relationship or shape, unless otherwise stated, include the states or shapes that are approximate, similar, or close to it.

[0073] Any component provided by the present invention can either be assembled from a plurality of individual components or be a single component manufactured by an integral forming process.

[0074] The adaptive changes made according to actual needs are all within the protection scope of the present invention.

[0075] It should be noted that for those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0076] Specific examples are used in the present invention to elaborate on the principles and implementation manners 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, there will be changes in the specific implementation manners and application scopes according to the idea of the present invention. 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 a wave erosion environment, characterized in that: Comprising: A box body (1) for containing seawater and a specimen (9), the box body (1) being of a sealed structure; A stirring paddle (2) for stirring the seawater in the box body (1) to generate simulated ocean waves, the stirring paddle (2) being arranged at the inner bottom of the box body (1), and one end of a drive shaft (3) for driving the stirring paddle (2) extending out of the box body (1) and being connected to the output end of a drive device (4); A bracket (5) for fixing the specimen (9), the bracket (5) being arranged in the box body (1), the bracket (5) being located above the stirring paddle (2), and the bracket (5) being provided with a water permeable channel; 2. The test device for simulating a wave erosion environment according to claim 1, wherein: The box body (1) includes a detachable top cover (6).

3. The test device for simulating a wave erosion environment according to claim 1, characterized in that: The box body (1) includes a lower box body (101) and an upper box body (102), the top of the lower box body (101) communicating with the bottom of the upper box body (102), the stirring paddle (2) being arranged at the inner bottom of the lower box body (101), and the bracket (5) being arranged in the upper box body (102); 4. The test device for simulating a wave erosion environment according to claim 1, wherein: The drive device (4) includes an electric motor, and the output end of the electric motor is connected to one end of the drive shaft (3) extending out of the box body (1).

5. The test device for simulating a wave erosion environment according to claim 4, wherein: The drive device (4) is arranged below the box body (1) outside.

6. The test device for simulating a wave erosion environment according to claim 4, wherein: The box body (1) is a transparent box body.

7. The test device for simulating a wave erosion environment according to claim 6, characterized in that: The drive device (4) is arranged above the box body (1) outside, a box body rotating platform (7) is arranged at the outer bottom of the box body (1), and the box body (1) is rotatably connected to the box body rotating platform (7) through a rotating shaft (8).

8. The test device for simulating a wave erosion environment according to claim 1, wherein: The bracket (5) is of a frame structure, and the hollow position inside the frame structure is the water permeable channel.

9. The test device for simulating a wave erosion environment according to claim 8, characterized in that: The bracket (5) is a ceramic bracket.

10. A test method for simulating a wave erosion environment, characterized in that: For the test device for simulating an ocean wave erosion environment according to any one of claims 1 to 9, comprising the following steps: S1. Fix and place the specimen (9) on the bracket (5); S2. Add seawater into the box body (1), and stop adding when the liquid level height of the seawater reaches a specified position; S3. Start the drive device (4) to create simulated ocean waves in the box body (1).

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