Scouring simulation device for simulating scour corrosion of offshore foundation pile

Abstract

The utility model discloses a washout simulation device for simulating washout corrosion of an offshore foundation pile, which comprises a water tank, sample holders arranged in the water tank and a gravel jet jetting device for carrying out gravel jet washout on samples in the sample holders, and the sample holders are mounted on two sides of the water tank; the sand jet jetting device comprises a base, a jetting module arranged on the base and a conveying pump used for conveying liquid in the water tank to the jetting module, the base is installed at the bottom of the water tank, and the outlet end of the jetting module directly faces the sample in the sample holder. The scouring simulation device is mainly used for large-size samples, the scouring experiment efficiency can be improved on the premise that the offshore foundation pile scouring condition is simulated to the maximum degree, and meanwhile the scouring simulation device is simple in structure and low in experiment implementation cost.

Description

Technical Field

[0001] The utility model relates to a scouring simulation device, in particular to a scouring simulation device for simulating the scouring corrosion of offshore piles. Background Art

[0002] As an emerging strategic industry, offshore wind power is an important direction for the development and utilization of renewable energy. The main equipment of offshore wind turbines is installed dozens of meters above the sea surface. The wind power tower piles (including steel structures such as tower barrels, pile foundations, and jacket platforms) are important supporting parts of wind turbines and play an important role in the stable operation of wind turbines. Compared with onshore wind power structures, offshore wind power tower piles serve in the marine corrosion environment for a long time, and the corrosion rate is about 4-5 times that on land. On the one hand, the pile materials are subjected to salt spray atmospheric corrosion and dry-wet alternate corrosion in a multi-environment of high temperature, high salt, and high humidity and heat, and inevitably bear scouring corrosion caused by wind, waves, and currents. To improve the service level of offshore wind power equipment and improve the operation and maintenance efficiency, it is necessary to conduct more accurate and reliable life assessments on wind power base materials and coatings. Then, it is necessary to comprehensively consider the indoor acceleration experiment under the coupling action of scouring and multi-environments to obtain the indoor-outdoor acceleration ratio. Accelerated experimental research requires large-size specimens, and the scouring speed in the tidal zone slowly decreases along the depth. Therefore, the scouring simulation device needs to meet the following conditions: (1) Applicable to large-size samples; (2) Low uniformity of scouring speed distribution.

[0003] At present, the conventional scouring corrosion devices cannot fully meet the scouring conditions at the pile foundation. Therefore, there is an urgent need for a scouring simulation device applicable to large-size specimens to obtain real service conditions, estimate accurate acceleration ratios and service lives, and provide data support for anti-corrosion at the base piles of offshore wind turbines. Summary of the Utility Model

[0004] In order to overcome the deficiencies of the prior art, the utility model provides a scouring simulation device for simulating the scouring corrosion of offshore piles. The scouring simulation device is mainly for large-size specimens. On the premise of maximizing the simulation of the scouring situation of offshore piles, it can also improve the efficiency of scouring experiments. At the same time, the scouring simulation device of the utility model has a simple structure and low experimental implementation cost.

[0005] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0006] A scouring simulation device for simulating the scouring corrosion of offshore piles, comprising a water tank, a specimen rack arranged in the water tank, and a grit jet spraying device for performing grit jet scouring on the specimens in the specimen rack. Among them, the specimen rack is installed on both sides of the water tank; the grit jet spraying device includes a base, a spraying module arranged on the base, and a delivery pump for delivering the liquid in the water tank to the delivery spraying module. Among them, the base is installed at the bottom of the water tank, and the outlet end of the spraying module faces the specimens in the specimen rack.

[0007] Preferably, it further includes a temperature control module, and the temperature control module is hung and installed at the right end of the water tank.

[0008] Preferably, the spraying module is of a T-shaped structure, and the spraying module is composed of a connecting piece, a circular pipe, a speed regulating valve, and a sand supply module. Among them, one end of the circular pipe is communicated with the outlet of the delivery pump through the connecting piece, and the other end is communicated with the inlet of the speed regulating valve. The outlet of the speed regulating valve is communicated with the inlet end of the sand supply module; the two outlet ends of the sand supply module are respectively communicated with the nozzles through spray pipes.

[0009] Preferably, the sand supply module is composed of a liquid-sand mixing chamber and a controllable funnel. Among them, the structure of the liquid-sand mixing chamber is a disk-shaped structure; the controllable funnel is installed directly above the liquid-sand mixing chamber.

[0010] Preferably, the connecting piece is a flange gasket.

[0011] Preferably, the specimen rack is L-shaped, and adjustment grooves for adjusting the placement angle of the specimens are provided on both the bottom and the side of the specimen rack. Among them, there are multiple groups of adjustment grooves, and the multiple groups of adjustment grooves are arranged along the extending directions of the bottom and the side of the specimen rack.

[0012] Preferably, the adjustment grooves are circular grooves.

[0013] Preferably, a distance adjuster for adjusting the distance between the back of the specimen rack and the outlet end of the spraying module is provided between the back of the specimen rack and the side wall of the water tank.

[0014] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0015] 1. The scouring simulation device of the present utility model for simulating the scouring corrosion of offshore piles places the specimens on the specimen rack, and then sprays grit jets through the grit jet spraying device to scour the specimens, thereby simulating the scouring corrosion of offshore piles and providing data support for anti-corrosion at the foundation piles of offshore wind turbines.

[0016] 2. The erosion simulation device for simulating the erosion and corrosion of offshore foundation piles of the present utility model is mainly for large-sized specimens. On the premise of ensuring the maximization of simulating the erosion situation of offshore foundation piles, it can also improve the efficiency of erosion experiments. At the same time, the erosion simulation device of the present utility model has a simple structure and a low cost for experiment implementation. Brief Description of the Drawings

[0017] Figure 1 It is a three-dimensional structure diagram of the erosion simulation device for simulating the erosion and corrosion of offshore foundation piles of the present utility model.

[0018] Figure 2 It is a three-dimensional structure diagram of the jet module.

[0019] Figure 3 It is a two-dimensional structure diagram of the pipeline of the jet module.

[0020] Figure 4 It is a distribution diagram of the simulated flow field of the pipeline.

[0021] Figure 5 It is a three-dimensional structure diagram of the specimen holder.

[0022] Figure 6 It is a diagram of the erosion angle of the specimen.

[0023] In the figure: 1 - water tank, 2 - delivery pump, 3 - jet module, 4 - base, 5 - temperature control module, 6 - specimen, 7 - specimen holder, 8 - connecting piece, 9 - round pipe, 10 - speed control valve, 11 - liquid-sand mixing chamber, 12 - controllable funnel, 13 - expander, 14 - adjusting groove. Specific Embodiments

[0024] The following further describes the present utility model in detail with reference to the embodiments and the drawings, but the embodiments of the present utility model are not limited thereto.

[0025] See Figures 1-6 , the erosion simulation device for simulating the erosion and corrosion of offshore foundation piles of the present utility model includes a water tank 1, a specimen holder 7 arranged in the water tank 1, and a sand-jet erosion device for performing sand-jet erosion on the specimen 6 in the specimen holder 7. Among them, the specimen holder 7 is installed on both sides of the water tank 1; the sand-jet erosion device includes a base 4, a jet module 3 arranged on the base 4, and a delivery pump 2 for delivering the liquid in the water tank 1 to the delivery jet module 3. Among them, the base 4 is installed at the bottom of the water tank 1, and the outlet end of the jet module 3 faces the specimen 6 in the specimen holder 7.

[0026] See Figures 1-6 , the erosion simulation device for simulating the erosion and corrosion of offshore foundation piles of the present utility model further includes a temperature control module 5, and the temperature control module 5 is hung and installed at the right end of the water tank 1.

[0027] See Figures 1-6 For the erosion simulation device for simulating the erosion and corrosion of offshore foundation piles of the present utility model, the injection module 3 has a T-shaped structure. The injection module 3 is composed of a connecting piece 8, a round pipe 9, a speed regulating valve 10, and a sand supply module. Among them, one end of the round pipe 9 is communicated with the outlet of the delivery pump 2 through the connecting piece 8, and the other end is communicated with the inlet of the speed regulating valve 10. The outlet of the speed regulating valve 10 is communicated with the inlet end of the sand supply module; the two outlet ends of the sand supply module are respectively communicated with nozzles through spray pipes;

[0028] In this embodiment, the connecting piece 8 is a flange gasket; the sand supply module is composed of a liquid-sand mixing chamber 11 and a controllable funnel 12. Among them, the structure of the liquid-sand mixing chamber 11 is a disc-shaped structure; the controllable funnel 12 is installed directly above the liquid-sand mixing chamber 11.

[0029] See Figures 1-6 For the erosion simulation device for simulating the erosion and corrosion of offshore foundation piles of the present utility model, the specimen holder 7 is L-shaped. The bottom and side of the specimen holder 7 are both provided with adjustment slots 14 for adjusting the placement angle of the specimen 6. Among them, there are multiple groups of the adjustment slots 14, and the multiple groups of adjustment slots 14 are arranged along the extending directions of the bottom and side of the specimen holder 7; in this embodiment, the adjustment slots 14 are circular slots.

[0030] See Figures 1-6 Between the back of the specimen holder 7 and the side wall of the water tank 1, there is a distance adjuster 13 for adjusting the distance between the specimen holder 7 and the outlet end of the injection module 3. The distance adjuster 13 is a telescopic device.

[0031] See Figures 1-6 For the erosion simulation device for simulating the erosion and corrosion of offshore foundation piles of the present utility model, it is applicable to the erosion of large-sized specimens 6. The outlet pipeline can be disassembled and replaced with different sizes. It can achieve two erosions at the same time, and the non-uniformity of the flow field distribution is low. The erosion angle can be adjusted conveniently, the structure is simple, and the experimental efficiency can be effectively improved.

[0032] See Figures 1-6 The working principle of the erosion simulation device for simulating the erosion and corrosion of offshore foundation piles of the present utility model is:

[0033] First, inject artificial seawater into the water tank 1, and the liquid level shall not be higher than the highest point of the base 4. Then, connect the external power supply, set the temperature value of the temperature control module 5, install the specimen 6 to be flushed on the specimen holder, place it on the corresponding slot of the adjustment groove 14 according to the experimental requirements. Then, turn on the delivery pump 2 (i.e., the water pump), inject gravel into the sand supply funnel, adjust the sand supply speed, use the regulating valve to adjust the flow rate in the pipeline, drag the specimen holder 7 along the wall of the water tank 1 to the center of the outlet end, adjust the distance between the specimen holder 7 and the outlet end of the spraying module 3, and the flushing experiment officially starts; after the experiment is over, turn off the water pump, the speed regulating valve 10, the sand supply funnel and the external power supply in sequence, take out the specimen 6, drain the brine in the water tank 1 to the outside through the drain port, the experiment is over, and close the top cover of the inner box.

[0034] The above is the preferred embodiment of the present invention, but the embodiments of the present invention are not limited to the above content. Any other changes, modifications, substitutions, combinations, and simplifications made without departing from the spirit and principle of the present invention shall be equivalent replacement methods and are all included in the protection scope of the present invention.

Claims

1. A scour simulation device for simulating scour corrosion of offshore foundation piles, characterized in that: The invention comprises a water tank, a sample rack arranged in the water tank, and a gravel jet injection device for flushing the sample in the sample rack with gravel jets, wherein the sample rack is installed on both sides of the water tank; the gravel jet injection device comprises a base, an injection module arranged on the base, and a delivery pump for delivering the liquid in the water tank to the delivery injection module, wherein the base is installed at the bottom of the water tank, and the outlet end of the injection module faces the sample in the sample rack.

2. The scour simulation device for simulating scour corrosion of offshore pile foundations according to claim 1, characterized in that: It also includes a temperature control module, which is hung on the right end of the water tank.

3. The scour simulation device for simulating scour corrosion of offshore pile foundations according to claim 1, characterized in that: The injection module is a T-shaped structure, which consists of a connector, a round tube, a speed regulating valve, and a sand supply module, wherein one end of the round tube is connected to the outlet of the delivery pump through the connector, and the other end is connected to the inlet of the speed regulating valve, and the outlet of the speed regulating valve is connected to the inlet end of the sand supply module; the two outlet ends of the sand supply module are connected to the nozzle through nozzles respectively.

4. The scour simulation device for simulating scour corrosion of offshore pile foundations according to claim 3, characterized in that: The sand supply module is composed of a liquid sand mixing chamber and a controllable funnel, wherein the structure of the liquid sand mixing chamber is a disc structure; and the controllable funnel is installed directly above the liquid sand mixing chamber.

5. The scour simulation device for simulating scour corrosion of offshore pile foundations according to claim 3, characterized in that: The connecting piece is a flange gasket.

6. The scour simulation device for simulating scour corrosion of offshore pile foundations according to claim 1, characterized in that: The sample rack is L-shaped, and the bottom and sides of the sample rack are provided with adjustment slots for adjusting the placement angle of the sample, wherein the adjustment slots are in multiple groups, and the multiple groups of adjustment slots are arranged along the extension direction of the bottom and sides of the sample rack.

7. The scour simulation device for simulating scour corrosion of offshore pile foundations according to claim 6, characterized in that: The adjusting groove is a circular groove.

8. The scour simulation device for simulating scour corrosion of offshore pile foundations according to claim 1, characterized in that: A distance adjuster for adjusting the distance between the sample rack and the outlet end of the injection module is arranged between the back of the sample rack and the side wall of the water tank.

Images