Stainless steel tube water entry simulation test device special for offshore wind power floating platform and use method of stainless steel tube water entry simulation test device

Abstract

The invention relates to the technical field of ship maritime work water entry testing, in particular to a special stainless steel pipe water entry simulation testing device for an offshore wind power floating platform and a using method. Comprising a steel pipe limiting unit used for fixing a steel pipe, an outer measuring unit used for applying pressure to the steel pipe from the outside is arranged over the steel pipe limiting unit, and main bodies of the steel pipe limiting unit and the outer measuring unit are both of fan-shaped structures. The electric push rod drives the inner measuring head body to extend into the steel pipe, then the micro servo electric cylinder is started to push the pestle head to extend into the extension channel and to be in sliding fit with each group of inclined planes, so that each group of test blocks are pushed out of the side outlet, all directions of the inner wall of the steel pipe are extruded at the same time, and then the micro servo electric cylinder is controlled to reset; and the inner wall of the steel pipe is hit in a circulating manner, so that the compression resistance test of the inner wall of the steel pipe is realized. And the inside and outside of the steel pipe can be tested, so that the functionality of the device is enriched.

Description

Technical Field

[0001] This invention belongs to the field of marine engineering water entry testing technology, and specifically relates to a water entry simulation testing device and its usage method for a special stainless steel pipe for offshore wind power floating platforms. Background Technology

[0002] Floating platforms are platforms installed on the sea surface, widely used in fields such as wind power generation. To resist corrosion from seawater's salt and alkali, floating platforms and their wind power equipment mostly use stainless steel as raw materials. This is especially true for pipelines used to transport fluids or gases, which require pressure- and corrosion-resistant stainless steel pipes. However, the sea is typically rough, so to ensure safety, simulated tests of the stainless steel pipes' resistance to wind and waves after immersion are usually conducted.

[0003] A search revealed the following patent document, CN120651483A, published on September 16, 2025, entitled "A Test Device and Method for Cross-Medium Water Entry of a Vehicle under Wave Conditions," which includes an experimental water tank, an adjustment module, and a launching module. The experimental water tank is equipped with a wave generator to create a wave surface in the water. The launching module is mounted on the launching platform of the adjustment module, and the tilt angle of the launching platform is adjustable to accommodate different launching angles as needed. The launching module includes a launcher and a drive source. The launcher is mounted on the launching platform, and the drive source is connected to one end of the launcher. The other end of the launcher has a rectifier structure. The high-pressure gas provided by the drive source allows the projectile loaded in the launcher to be released with a certain initial velocity. The rectifier structure reduces the interference along the radial direction of the launcher caused by gas turbulence when the projectile leaves the launcher.

[0004] However, the above embodiments still have the following drawbacks: The above embodiments can only perform unidirectional testing on media with conventional shapes, but cannot test some unconventional components, especially cylindrical steel pipes. When steel pipes are actually transporting fluids, they often face sea waves. Due to the difference in internal and external pressure, they are easily damaged. If only the external is tested, it is difficult to match the real situation, resulting in its function being too limited. Summary of the Invention

[0005] To address the aforementioned issues, this invention provides a water-entry simulation testing device for stainless steel pipes used in offshore wind power floating platforms. The device includes a steel pipe limiting unit for fixing the steel pipe, an external measuring unit for applying pressure to the steel pipe from the outside, both the steel pipe limiting unit and the external measuring unit having a fan-shaped structure, and an internal measuring unit fixedly installed on one side wall of the steel pipe limiting unit. The internal testing unit includes a crescent-shaped strip with a second outer arc groove of a fan-shaped structure at its top. A test head fixing mechanism is slidably connected within the second outer arc groove. A second electric turntable for horizontal rotation is fixedly installed on the top of the test head fixing mechanism. A vertical plate is fixedly installed on the top of the second electric turntable. An electric push rod is fixedly installed horizontally on the side wall of the vertical plate near the first fan plate. A translation disk is driven and installed on the output end of the electric push rod. A test head mechanism for applying pressure to the steel pipe from the inner wall is installed horizontally at the center of the translation disk.

[0006] Furthermore, the steel pipe limiting unit includes a first fan-shaped plate with a fan-shaped structure. Several sets of first outer arc grooves are arranged at equal intervals along the horizontal direction on the top of the first fan-shaped plate. The top view of the first outer arc groove is a fan-shaped annular structure. Several sets of first side slots are arranged at equal intervals on both sides of the top of the first outer arc groove. A set of first inner arc grooves is respectively opened on the inner walls of both sides of the first outer arc groove. A clamping plate fixing mechanism is slidably connected in the first outer arc groove. A first electric turntable is fixedly installed on the top of the clamping plate fixing mechanism.

[0007] Furthermore, a clamping plate mounting block is installed on the top of the first electric turntable; a lower clamping plate is slidably connected to the top of the clamping plate mounting block, the lower clamping plate is a fan-shaped tubular structure, and the height at the center is higher than the height at both ends, and an anti-cutting opening is provided on the top of the lower clamping plate; an upper clamping plate is movably installed on the top of the anti-cutting opening, the upper clamping plate has the same structure as the lower clamping plate, and the two are symmetrically arranged.

[0008] Furthermore, the clamp fixing mechanism includes an upper fixed plate, on which two sets of upper side ears are symmetrically arranged on both sides. The bottom of the upper fixed plate extends into the first outer arc groove and is fitted with a lower fixed plate. On which two sets of lower side ears are symmetrically arranged on both sides, the two sets of lower side ears are slidably connected in the two sets of first inner arc grooves respectively. A plug is movably installed on the upper side ear, the bottom of the plug movably passes through any set of first side slots on the same side, and is movably inserted into a set of lower side ears on the same side.

[0009] Furthermore, several sets of second side slots are arranged at equal intervals on both sides of the second outer arc groove, and a set of second inner arc grooves are respectively opened on the inner walls on both sides of the second outer arc groove. The structure of the test head fixing mechanism is the same as that of the clamp fixing mechanism. Several sets of extension plates are distributed in a ring array around the perimeter of the translation disk. A port slot is opened at the end of the extension plate away from the translation disk. The length of the main body of the test head mechanism is longer than the length of the extension plate.

[0010] Furthermore, the test head mechanism includes an inner test head body, which has an inner cavity. The end of the inner cavity away from the translation disk is connected to an extension channel. Several sets of side outlets are distributed in a circular array around the extension channel. A transverse sliding groove is formed on the inner wall of the side outlet, and a slider is slidably connected in the transverse sliding groove. A return spring is installed on one side wall of the slider. One end of the slider extends into the side outlet and is equipped with a test block. One end of the test block extends into the extension channel, and its port is set as an inclined surface. The end of the test block away from the extension channel extends movably to the outside of the side outlet.

[0011] Furthermore, a miniature servo electric cylinder is installed in the inner cavity, the output end of which extends movably into the extension channel and is equipped with a pestle head, which slides and fits against the inclined surface.

[0012] Furthermore, the external testing unit includes a second fan plate, the second fan plate being the same size and structure as the first fan plate, and the two being arranged symmetrically vertically; the bottom of the first fan plate has several sets of third outer arc grooves arranged at equal intervals, and several sets of third side slots are arranged at equal intervals on both sides of the third outer arc groove; a set of third inner arc grooves is provided on the inner walls of both sides of the third outer arc groove; a pressure head fixing mechanism is slidably connected in the third outer arc groove; the structure of the pressure head fixing mechanism is the same as that of the test head fixing mechanism.

[0013] Furthermore, a hydraulic cylinder is installed vertically at the bottom of the pressure head fixing mechanism, and an arc pressure plate is installed at the bottom of the hydraulic cylinder. The side view cross-section of the arc pressure plate is a fan-shaped annular structure, and the height at the center is lower than the height at both ends.

[0014] A method for using a water immersion simulation test device for a special stainless steel pipe of an offshore wind power floating platform, the practical method comprising: Fix the steel pipe to the steel pipe limiting unit; The control test head fixing mechanism slides within the second outer arc groove until it reaches the end of the steel pipe and is then fixed. Control the second electric turntable to drive the output end of the inner probe body to rotate until it faces the port of the steel pipe; Start the electric push rod, which drives the output end of the test head fixing mechanism to extend into the steel pipe. The control test head fixing mechanism strikes the inner wall of the steel pipe multiple times from all directions to achieve the pressure resistance test of the inside of the steel pipe.

[0015] The beneficial effects of this invention are: 1. The control test head fixing mechanism slides within the second outer arc groove until it reaches the steel pipe end. Then, the output end of the inner test head body is rotated and aligned with the steel pipe end via the second electric turntable. The electric push rod is activated to extend the inner test head body into the steel pipe. Then, the micro servo cylinder is activated to push the pestle head into the extension channel, where it slides and engages with each set of inclined surfaces, thus pushing each set of test blocks out of the side outlet and simultaneously compressing the inner wall of the steel pipe from all directions. The micro servo cylinder is then controlled to reset, and this cycle repeats, striking the inner wall of the steel pipe. This simulates the rapid changes in internal and external pressure caused by waves and wind during fluid transport in floating platforms and wind turbines, achieving a pressure resistance test on the inner wall of the steel pipe. This enriches the testing items, allowing testing both the inside and outside of the steel pipe, thus enhancing the functionality of the device.

[0016] 2. Slide the upper fixed plate horizontally along the position of the first outer arc groove, and then insert the two sets of bolts into the two sets of upper side ears respectively. After the bottom of the bolt passes through the corresponding set of first side clamps, it is inserted into the lower side ear on the same side, thereby fixing the upper fixed plate. Then, adjust the extension direction of each set of lower clamps according to the curvature of the steel pipe, and then control the rotation of each set of first electric turntables until the extension direction of each set of lower clamps is on the same straight line or curve, so that the device can be used for straight steel pipes and curved steel pipes of any curvature, thereby improving the compatibility of the device.

[0017] 3. Each group of third outer arc grooves is located directly above the gap between the corresponding two groups of first outer arc grooves, and the movement and fixing method of the pressure head fixing mechanism is the same as that of the clamping plate fixing mechanism, allowing each group of arc pressure plates to move completely in accordance with the shape of the steel pipe. Furthermore, each group of arc pressure plates can move and rise independently, allowing for single-point or multi-point simultaneous external pressure tests as required. Simultaneously, during the test, by controlling the independent rotation of each group of first electric turntables and then controlling the independent rising and falling of each group of arc pressure plates, the scenario of the steel pipe encountering irregular waves from different directions at sea can be simulated, thereby improving the auxiliary effect of the test.

[0018] 4. When the steel pipe is twisted due to external testing, the joint between it and the lower clamp and the arc pressure plate will twist due to pressure. Since both are fan-shaped tubular structures, the steel pipe will be supported by the inner wall of the lower clamp and the arc pressure plate. This avoids secondary damage to the steel pipe at the edge of the traditional clamp and also avoids slippage at the joint between the steel pipe and the arc pressure plate, thereby improving the accuracy of the steel pipe pressure test.

[0019] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram of the detection device according to an embodiment of the present invention is shown.

[0022] Figure 2 A schematic diagram of the steel pipe limiting unit according to an embodiment of the present invention is shown.

[0023] Figure 3 A partial cross-sectional schematic diagram of the first outer arc groove according to an embodiment of the present invention is shown.

[0024] Figure 4 A schematic diagram of the structure of the lower clamping plate according to an embodiment of the present invention is shown.

[0025] Figure 5 A schematic diagram of the clamp fixing mechanism according to an embodiment of the present invention is shown.

[0026] Figure 6 A schematic diagram of the internal test unit according to an embodiment of the present invention is shown.

[0027] Figure 7 A schematic diagram showing the connection between the test head mechanism and the electric push rod according to an embodiment of the present invention is provided.

[0028] Figure 8 A cross-sectional schematic diagram of a test head mechanism according to an embodiment of the present invention is shown.

[0029] Figure 9 A bottom view of the external measuring unit according to an embodiment of the present invention is shown.

[0030] Figure 10 A schematic diagram showing the connection between the arc pressure plate and the hydraulic cylinder according to an embodiment of the present invention is provided.

[0031] In the diagram: 100, steel pipe limiting unit; 110, first sector plate; 120, first outer arc groove; 121, first inner arc groove; 130, first side bayonet; 140, clamp fixing mechanism; 141, upper fixed plate; 142, lower fixed plate; 143, upper side ear; 144, lower side ear; 145, plug; 150, first electric turntable; 160, clamp mounting block; 170, lower clamp plate; 171, anti-cut opening; 180, upper clamp plate; 200, internal testing unit; 210, crescent strip; 211, second outer arc groove; 212, second side bayonet; 220, test head fixing mechanism; 230, second electric... Turntable; 240, Vertical plate; 250, Electric push rod; 260, Translation plate; 270, Extension plate; 271, Port slot; 280, Test head mechanism; 281, Inner test head body; 282, Inner cavity; 283, Extension channel; 284, Side outlet; 285, Horizontal slide groove; 2851, Slider; 2852, Return spring; 286, Test block; 287, Miniature servo electric cylinder; 288, Plunger head; 300, External test unit; 310, Second sector plate; 311, Third outer arc groove; 312, Third side bayonet; 320, Pressure head fixing mechanism; 330, Hydraulic cylinder; 340, Arc pressure plate. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0033] This invention provides a water-entry simulation testing device for a special stainless steel pipe on an offshore wind power floating platform, exemplarily, such as... Figure 1 As shown, it includes a steel pipe limiting unit 100, the main body of which has a fan-shaped structure. The steel pipe limiting unit 100 is used to fix the steel pipe.

[0034] For example, an outer measuring unit 300 is provided directly above the steel pipe limiting unit 100. The main body of the outer measuring unit 300 is the same as that of the steel pipe limiting unit 100, and the output end of the outer measuring unit 300 extends movably to the surface of the steel pipe limiting unit 100. The outer unit 300 is used to apply pressure to the steel pipe from the top to achieve external pressure resistance testing of the steel pipe.

[0035] For example, an internal measuring unit 200 is installed on one side of the outer wall of the steel pipe limiting unit 100, and the output end of the internal measuring unit 200 extends movably to the surface of the steel pipe limiting unit 100. The output end of the internal measuring unit 200 can extend into the interior of the steel pipe and apply pressure to the steel pipe from the inside.

[0036] For example, such as Figure 2 , Figure 3 and Figure 4 As shown, the steel pipe limiting unit 100 includes a first fan-shaped plate 110. Several sets of first outer arc grooves 120 are arranged at equal intervals along the horizontal direction on the top of the first fan-shaped plate 110. The top view of the first outer arc groove 120 is a fan-shaped annular structure. Several sets of first side slots 130 are arranged at equal intervals on both sides of the top of the first outer arc groove 120. A set of first inner arc grooves 121 are respectively formed on the inner walls of both sides of the first outer arc groove 120. A clamping plate fixing mechanism 140 is slidably connected inside the first outer arc groove 120. A first electric turntable 150 is fixedly installed on the top of the clamping plate fixing mechanism 140. The model of the first electric turntable 150 is Y200RA200. The rotation angle of the first electric turntable 150 is less than 90 degrees.

[0037] For example, a clamping plate mounting block 160 is installed on the top of the first electric turntable 150. A lower clamping plate 170 is fixedly installed on the top of the clamping plate mounting block 160. The lower clamping plate 170 is a fan-shaped tubular structure, and the height at the center is higher than the height at both ends. A cut-resistant opening 171 is provided on the top of the lower clamping plate 170. An upper clamping plate 180 is movably installed on the top of the cut-resistant opening 171. The structure of the upper clamping plate 180 is the same as that of the lower clamping plate 170, and the two are symmetrically arranged. The connection between the upper clamping plate 180 and the lower clamping plate 170 is preferably fixed by bolts.

[0038] For example, such as Figure 5 As shown, the clamp fixing mechanism 140 includes an upper fixed plate 141. Two sets of upper side ears 143 are symmetrically arranged on both sides of the upper fixed plate 141. The bottom of the upper fixed plate 141 extends into the first outer arc groove 120 and is fitted with a lower fixed plate 142. Two sets of lower side ears 144 are symmetrically arranged on both sides of the lower fixed plate 142. The two sets of lower side ears 144 are slidably connected in the two sets of first inner arc grooves 121. A plug 145 is movably installed on the upper side ear 143. The bottom of the plug 145 movably passes through any set of first side slots 130 on the same side and is movably inserted into a set of lower side ears 144 on the same side.

[0039] First, based on the shape of the steel pipe, adjust the position of each set of inner clamping plate fixing mechanisms 140 within each set of outer arc grooves 120: First, slide the upper fixing plate 141 horizontally along the position of the first outer arc groove 120. After sliding to the corresponding position, insert the two sets of bolts 145 into the two sets of upper side ears 143 respectively. After the bottom of the bolt 145 passes through the corresponding set of first side bayonet 130, it is inserted into the lower side ear 144 on the same side, thereby fixing the upper fixing plate 141. Then, adjust the extension direction of each set of lower clamping plates 170 according to the curvature of the steel pipe, so that the device can be applied to straight steel pipes and curved steel pipes of any curvature. Control the rotation of each set of first electric turntables 150 until the extension direction of each set of lower clamping plates 170 is on the same straight line or curve.

[0040] Then, the steel pipe frame is attached to each set of lower clamping plates 170, and each set of upper clamping plates 180 is installed on top of its corresponding set of lower clamping plates 170, thereby fixing the steel pipe. Then, the output end of the external testing unit 300 is activated to descend and press down on all parts of the steel pipe simultaneously. When the steel pipe is twisted due to pressure, the joint between it and the lower clamping plate 170 will also twist. Since the lower clamping plate 170 is a fan-shaped tubular structure, and the height at the center is higher than the height at both ends, when the steel pipe twists at the joint with the lower clamping plate 170, it will be supported by the inner wall of the lower clamping plate 170, avoiding secondary damage to the steel pipe at the edge of the traditional clamp, thereby improving the accuracy of the steel pipe compression test.

[0041] For example, such as Figure 6 and Figure 7 As shown, the internal testing unit 200 includes a crescent-shaped strip 210. The top of the crescent-shaped strip 210 has a second outer arc groove 211 with a fan-shaped structure. Several sets of second side slots 212 are evenly spaced on both sides of the second outer arc groove 211. A set of second inner arc grooves is formed on the inner walls of both sides of the second outer arc groove 211. A test head fixing mechanism 220 is slidably connected within the second outer arc groove 211. The structure of the test head fixing mechanism 220 is the same as that of the clamp fixing mechanism 140. A second electric turntable 230 is fixedly installed on the top of the test head fixing mechanism 220. A vertical plate 240 is fixedly installed on the top of the second electric turntable 230. An electric push rod 250 is fixedly installed horizontally on the side wall of the vertical plate 240 near the first fan plate 110. A translation disk 260 is driven and installed on the output end of the electric push rod 250. The rotation angle of the second electric turntable 230 is less than 90 degrees.

[0042] For example, several sets of extension plates 270 are arranged in a circular array around the periphery of the translation disk 260, and a port slot 271 is provided at the end of the extension plate 270 away from the translation disk 260. A test head mechanism 280 is installed horizontally at the center of the translation disk 260, and the main body length of the test head mechanism 280 is longer than the length of the extension plate 270.

[0043] For example, such as Figure 8 As shown, the test head mechanism 280 includes an inner test head body 281. An inner cavity 282 is formed within the inner test head body 281. One end of the inner cavity 282, away from the translation disk 260, is connected to an extension channel 283. Several sets of side outlets 284 are arranged in a circular array around the extension channel 283. A transverse sliding groove 285 is formed on the inner wall of each side outlet 284. A slider 2851 is slidably connected within the transverse sliding groove 285. A return spring 2852 is installed on one side wall of the slider 2851. One end of the slider 2851 extends into the side outlet 284 and is fitted with a test block 286. One end of the test block 286 extends into the extension channel 283, and its port is set as an inclined surface. The end of the test block 286 away from the extension channel 283 extends movably to the outside of the side outlet 284.

[0044] For example, a miniature servo cylinder 287 is installed in the inner cavity 282. The output end of the miniature servo cylinder 287 extends movably into the extension channel 283 and is equipped with a pestle head 288, which slides against the inclined surface. The miniature servo cylinder 287 is of the INSPIRE-ROBOTS model.

[0045] After the steel pipe is fixed, when the internal pressure resistance test of the steel pipe is required, the test head fixing mechanism 220 is slid within the second outer arc groove 211 until it reaches the end of the steel pipe, and the test head fixing mechanism 220 is fixed in the same way as the clamp fixing mechanism 140. After completion, the output end of the inner test head body 281 is rotated by controlling the second electric turntable 230 until it faces the end of the steel pipe. Then, the electric push rod 250 is activated, which drives the inner test head body 281 to extend into the inside of the steel pipe until the end slot 271 is engaged with the end of the steel pipe, thereby preventing shaking during the internal test of the steel pipe. Then, the micro servo electric cylinder 287 is activated, which pushes the pestle head 288 to extend into the extension channel 283 and slides against each set of inclined surfaces, thereby pushing each set of test blocks 286 out of the side outlet 284 and simultaneously compressing the inner wall of the steel pipe from all directions. This achieves the pressure resistance test of the inner wall of the steel pipe.

[0046] Then, the micro servo motor 287 is controlled to drive the pestle head 288 to reset. Under the action of the reset spring 2852, each group of test blocks 286 returns to the side outlet 284, and then repeats the cycle to strike the inner wall of the steel pipe multiple times.

[0047] For example, such as Figure 9 and Figure 10As shown, the external measuring unit 300 includes a second sector plate 310, which has the same size and structure as the first sector plate 110 and is symmetrically arranged vertically. The bottom of the first sector plate 110 has several sets of third outer arc grooves 311 arranged at equal intervals, each set of third outer arc grooves 311 located directly above the gap between two corresponding sets of first outer arc grooves 120. Several sets of third side slots 312 are arranged at equal intervals on both sides of the third outer arc groove 311. A set of third inner arc grooves is provided on the inner walls of both sides of the third outer arc groove 311, and a pressure head fixing mechanism 320 is slidably connected within the third outer arc groove 311. The structure of the pressure head fixing mechanism 320 is the same as that of the clamping plate fixing mechanism 140.

[0048] For example, a hydraulic cylinder 330 is installed vertically at the bottom of the pressure head fixing mechanism 320, and an arc pressure plate 340 is installed at the bottom of the hydraulic cylinder 330. The side view cross section of the arc pressure plate 340 is a fan-shaped annular structure, and the height at the center is lower than the height at both ends.

[0049] When a pressure test is required on the exterior of the steel pipe, firstly, each set of pressure head fixing mechanisms 320 slides within the third outer arc groove 311 of each set until it is directly above the steel pipe. Then, the pressure head fixing mechanisms 320 are fixed using the same fixing method as the clamp fixing mechanism 140. Next, the arc pressure plate 340 is lowered by the hydraulic cylinder 330 and squeezes the steel pipe from above, thus achieving the pressure test on the exterior of the steel pipe.

[0050] The above embodiments have the following beneficial effects: 1. The control test head fixing mechanism 220 slides within the second outer arc groove 211 and reaches the steel pipe end. Then, the second electric turntable 230 drives the output end of the inner test head body 281 to rotate and align with the steel pipe end. The electric push rod 250 is activated to extend the inner test head body 281 into the steel pipe. Then, the micro servo cylinder 287 is activated to push the pestle head 288 into the extension channel 283, where it slides and engages with each set of inclined surfaces. This pushes each set of test blocks 286 out of the side outlet 284, simultaneously compressing the inner wall of the steel pipe from all directions. The micro servo cylinder 287 is then controlled to reset, and this cycle repeats to strike the inner wall of the steel pipe, thus achieving a compressive strength test on the inner wall of the steel pipe. This enriches the test items, allowing testing both inside and outside the steel pipe, thereby enhancing the functionality of the device.

[0051] 2. Slide the upper fixed plate 141 horizontally along the position of the first outer arc groove 120, and then insert the two sets of bolts 145 into the two sets of upper side ears 143 respectively. After the bottom of the bolt 145 passes through the corresponding set of first side slots 130, it is inserted into the lower side ear 144 on the same side, thereby fixing the upper fixed plate 141. Then, adjust the extension direction of each set of lower clamping plates 170 according to the curvature of the steel pipe, and then control the rotation of each set of first electric turntables 150 until the extension direction of each set of lower clamping plates 170 is on the same straight line or curve, so that the device can be applied to straight steel pipes and curved steel pipes of any curvature, thereby improving the compatibility of the device.

[0052] 3. Each group of third outer arc grooves 311 is located directly above the gap between the corresponding two groups of first outer arc grooves 120, and the movement and fixing method of the pressure head fixing mechanism 320 is the same as that of the clamping plate fixing mechanism 140, so that each group of arc pressure plates 340 can move completely in accordance with the shape of the steel pipe. Furthermore, each group of arc pressure plates 340 can move and rise independently, allowing for single-point or multi-point simultaneous external pressure tests as required. This improves the auxiliary effect of the test.

[0053] 4. When the steel pipe is twisted due to external testing, the joint between it and the lower clamping plate 170 and the arc pressure plate 340 is also twisted due to pressure. Since both are fan-shaped tubular structures, the steel pipe will be supported by the inner walls of the lower clamping plate 170 and the arc pressure plate 340. This avoids secondary damage to the steel pipe at the edge of the traditional clamp and also avoids slippage at the joint between the steel pipe and the arc pressure plate 340, thereby improving the accuracy of the steel pipe pressure test.

[0054] Based on the aforementioned simulated test device for the water entry of a stainless steel pipe for offshore wind power floating platforms, this invention also proposes a method for using the test device. For example, the method includes: Slide the upper plate horizontally along the position of the first outer arc groove. After sliding to the corresponding position, insert the two sets of plugs into the two sets of upper side ears respectively. After the bottom of the plug passes through the corresponding first side bayonet, it is inserted into the lower side ear on the same side to fix the upper plate. Adjust the extension direction of each set of lower clamping plates according to the curvature of the steel pipe until the extension direction of each set of lower clamping plates is on the same straight line or curve. Connect the steel pipe frame to each set of lower clamps, and install each set of upper clamps on top of its corresponding set of lower clamps; The test head fixing mechanism is controlled to slide in the second outer arc groove until it reaches the end of the steel pipe, and the test head fixing mechanism is fixed in the same way as the clamp fixing mechanism. Control the second electric turntable to drive the output end of the inner probe body to rotate until it faces the port of the steel pipe; Start the electric push rod, which will drive the inner probe body to extend into the steel pipe until the port slot is engaged with the end of the steel pipe. The miniature servo electric cylinder pushes the pestle head to extend into the extension channel and slides and fits against each set of inclined surfaces, thereby pushing each set of test blocks out of the side outlet and simultaneously squeezing the inner wall of the steel pipe from all directions. The micro servo motor is controlled to drive the pestle head to reset. Under the action of the reset spring, each group of test blocks returns to the side outlet and then repeats the cycle to hit the inner wall of the steel pipe multiple times. When conducting external testing of the steel pipe, allow each group of pressure head fixing mechanisms to slide within the third outer arc groove of each group until they reach directly above the steel pipe, and then fix them in place. The arc pressure plate is lowered by a hydraulic cylinder and squeezes the steel pipe from above.

[0055] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A water immersion simulation test device for a stainless steel pipe specifically designed for offshore wind power floating platforms, comprising a steel pipe limiting unit for fixing the steel pipe, characterized in that: An external measuring unit for applying pressure to the steel pipe from the outside is provided directly above the steel pipe limiting unit. Both the main body of the steel pipe limiting unit and the external measuring unit are fan-shaped structures. An internal measuring unit is fixedly installed on one side wall of the main body of the steel pipe limiting unit. The internal testing unit includes a crescent-shaped strip. A second outer arc groove with a fan-shaped structure is formed at the top of the crescent-shaped strip. A test head fixing mechanism is slidably connected within the second outer arc groove. A second electric turntable for horizontal rotation is fixedly installed at the top of the test head fixing mechanism. A vertical plate is fixedly installed at the top of the second electric turntable. An electric push rod is fixedly installed horizontally on the side wall of the vertical plate near the first fan-shaped plate. A translation disk is driven and installed on the output end of the electric push rod. A test head mechanism for applying pressure to the steel pipe from the inner wall is installed horizontally at the center of the translation disk. The external measuring unit includes a second fan plate, which is the same size and structure as the first fan plate and is symmetrically arranged vertically. The bottom of the first fan plate has several sets of third outer arc grooves arranged at equal intervals. Several sets of third side slots are arranged at equal intervals on both sides of the third outer arc groove. A set of third inner arc grooves is provided on the inner walls of both sides of the third outer arc groove. A pressure head fixing mechanism is slidably connected in the third outer arc groove. A hydraulic cylinder is installed vertically at the bottom of the pressure head fixing mechanism. An arc pressure plate is installed at the bottom of the hydraulic cylinder. The side view cross-section of the arc pressure plate is a fan-shaped annular structure.

2. The stainless steel pipe water entry simulation test device for offshore wind power floating platforms according to claim 1, characterized in that: The steel pipe limiting unit includes a first fan-shaped plate with a fan-shaped structure. Several sets of first outer arc grooves are arranged at equal intervals along the horizontal direction on the top of the first fan-shaped plate. The top view of the first outer arc groove is a fan-shaped annular structure. Several sets of first side slots are arranged at equal intervals on both sides of the top of the first outer arc groove. A set of first inner arc grooves is opened on the inner walls of both sides of the first outer arc groove. A clamping plate fixing mechanism is slidably connected in the first outer arc groove. A first electric turntable is fixedly installed on the top of the clamping plate fixing mechanism.

3. The stainless steel pipe water entry simulation test device for offshore wind power floating platforms according to claim 2, characterized in that: The first electric turntable is equipped with a clamping plate mounting block on its top; a lower clamping plate is fixedly mounted on the top of the clamping plate mounting block. The lower clamping plate is a fan-shaped tubular structure, and the height at the center is higher than the height at both ends. An anti-cutting opening is provided on the top of the lower clamping plate. An upper clamping plate is movably mounted on the top of the anti-cutting opening. The upper clamping plate has the same structure as the lower clamping plate, and the two are symmetrically arranged.

4. The stainless steel pipe water entry simulation test device for offshore wind power floating platforms according to claim 3, characterized in that: The clamp fixing mechanism includes an upper fixed plate, on which two sets of upper side ears are symmetrically arranged on both sides. The bottom of the upper fixed plate extends into the first outer arc groove and is fitted with a lower fixed plate. On which two sets of lower side ears are symmetrically arranged on both sides, the two sets of lower side ears are slidably connected in the two sets of first inner arc grooves respectively. A plug is movably installed on the upper side ear, the bottom of the plug movably passes through any set of first side slots on the same side, and is movably inserted into a set of lower side ears on the same side.

5. The stainless steel pipe water entry simulation test device for offshore wind power floating platforms according to claim 2, characterized in that: The second outer arc groove has several sets of second side slots arranged at equal intervals on both sides. The inner walls of the second outer arc groove are respectively provided with a set of second inner arc grooves. The structure of the test head fixing mechanism is the same as that of the clamp fixing mechanism. Several sets of extension plates are distributed in a ring array around the perimeter of the translation disk. The extension plates are provided with port slots at the ends away from the translation disk. The length of the main body of the test head mechanism is longer than the length of the extension plates.

6. The stainless steel pipe water entry simulation test device for offshore wind power floating platforms according to claim 1, characterized in that: The test head mechanism includes an inner test head body, which has an inner cavity. The end of the inner cavity away from the translation disk is connected to an extension channel. Several sets of side outlets are distributed in a circular array around the extension channel. A transverse sliding groove is formed on the inner wall of the side outlet, and a slider is slidably connected in the transverse sliding groove. A return spring is installed on one side wall of the slider. One end of the slider extends into the side outlet and is equipped with a test block. One end of the test block extends into the extension channel, and its port is set as an inclined surface. The end of the test block away from the extension channel extends movably to the outside of the side outlet.

7. The stainless steel pipe water immersion simulation test device for offshore wind power floating platforms according to claim 6, characterized in that: A miniature servo electric cylinder is installed in the inner cavity. The output end of the miniature servo electric cylinder extends movably into the extension channel and is equipped with a pestle head, which slides and fits against the inclined surface.

8. The stainless steel pipe water entry simulation test device for offshore wind power floating platforms according to claim 1, characterized in that: The structure of the pressure head fixing mechanism is the same as that of the test head fixing mechanism.

9. The stainless steel pipe water immersion simulation test device for offshore wind power floating platforms according to claim 8, characterized in that: The height at the center of the arc-shaped pressure plate should be lower than the height at both ends.

10. A method of using a water-entry simulation test device for a special stainless steel pipe used in any one of claims 1-9 of an offshore wind power floating platform, characterized in that: The practical method includes: Fix the steel pipe to the steel pipe limiting unit; The control test head fixing mechanism slides within the second outer arc groove until it reaches the end of the steel pipe and is then fixed. Control the second electric turntable to drive the output end of the inner probe body to rotate until it faces the port of the steel pipe; Start the electric push rod, which drives the output end of the test head fixing mechanism to extend into the steel pipe. The control test head fixing mechanism strikes the inner wall of the steel pipe multiple times from all directions to achieve the pressure resistance test of the inside of the steel pipe.

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