A device and construction method for repairing underwater structures based on a 3D printer

Abstract

The application provides a device for repairing underwater structure based on a 3D printer, which comprises a main bearing frame, a telescopic rod arranged on one side of the main bearing frame, a suction disc connected to the other end of the telescopic rod and used for fixing the device, a 3D printer arranged in the inner cavity of the main bearing frame, a plurality of nozzles arranged on the output end of the 3D printer, a grouting pipe connected between the material input end of the 3D printer and the output end of a grouting device, the grouting device being connected to a vacuum pump, and an illumination device arranged on one side of the main bearing frame. The device is easy to manufacture, simple to operate and low in cost, and has wide practical significance and application prospect in engineering.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of underwater structure crack repair experiments, in particular to a device for repairing underwater structures based on a 3D printer and a construction method. BACKGROUND

[0002] In recent years, with the development of China's infrastructure projects, port terminals and coastal water conservancy projects have increased; due to the large amount of underwater engineering construction, such as dams, bridges, tunnel projects, as the number of years increases, cracks in these underwater structures are inevitable, so underwater structure repair plays an important role in the maintenance of underwater engineering. However, due to technical problems, underwater structures cannot be repaired in time, and under the scouring of seawater, cracks are further expanded and internal concrete calcification is caused, affecting the durability and safety of the project.

[0003] By printing the crack repair through the 3D printer, compared with the ordinary method of repairing the crack, the crack can be repaired more accurately, and the repair efficiency is greatly improved by setting the magnetic point and combining the 3D printer; the conventional underwater structure repair technology cannot accurately and efficiently fill the cracks due to the slurry, so the repair cannot achieve the expected effect, affecting the integrity of the project.

[0004] Therefore, there is an urgent need for a device for repairing underwater structures based on a 3D printer and a construction method to solve the above problems. SUMMARY

[0005] The purpose of the present application is to overcome the above-mentioned shortcomings, and to provide a device for repairing underwater structures based on a 3D printer and a construction method to solve the problems raised in the background art.

[0006] To solve the above technical problems, the technical scheme adopted by the present application is: a device for repairing underwater structures based on a 3D printer, comprising a main load-bearing frame, a telescopic rod being arranged on one side of the main load-bearing frame, a suction disc for fixing the device being connected to the other end of the telescopic rod, a 3D printer being arranged in the inner cavity of the main load-bearing frame, a plurality of nozzles being arranged on the output end of the 3D printer, a grouting pipe being connected between the material input end of the 3D printer and the output end of a grouting device, the grouting device being connected with a vacuum pump, and an illumination device being arranged on one side of the main load-bearing frame.

[0007] Preferably, the main load-bearing frame comprises a support frame and a vacuum cover, the size of the vacuum cover is the same as that of the 3D printer, a layer of silica gel pad is arranged between the vacuum cover and the 3D printer, and a grouting hole is reserved on the upper part of the vacuum cover for the grouting pipe to pass through.

[0008] Preferably, the support frame is made of stainless steel material, the vacuum cover is made of acrylic transparent plate, and a rubber sealing layer is arranged around the grouting hole.

[0009] Preferably, the nozzle comprises a magnetic ring, a double-hole grouting device and a nano isolation layer, the magnetic ring is arranged in a surrounding manner on the nozzle, the double-hole grouting device is arranged inside the nozzle, the output end of the double-hole grouting device is arranged at the output end of the nozzle, and the nano isolation layer is arranged below the magnetic ring.

[0010] Preferably, the magnetic ring is further provided with a matched magnetic block, and the magnetic block is used to be arranged at a required repair structure during construction.

[0011] In addition, the application further discloses an operation method of the device for repairing underwater structures based on a 3D printer.

[0012] Step 1. Material preparation: placing the device in the operation area, arranging the magnetic block at the required repair crack, and preparing the required magnetic slurry or magnetic photosensitive resin;

[0013] Step 2. Preparing the grouting slurry, and placing the prepared magnetic slurry or magnetic photosensitive resin into the grouting device;

[0014] Step 3. Placing the 3D printer into water, and placing the nozzle for spraying the magnetic slurry or magnetic photosensitive resin close to the crack;

[0015] Step 4. Placing the grouting device filled with the magnetic slurry or magnetic photosensitive resin, adjusting the initial grouting pressure, then injecting the magnetic slurry or magnetic photosensitive resin into the crack through the nozzle, and observing the diffusion and filling of the magnetic slurry or magnetic photosensitive resin in the crack under the action of different grouting pressures;

[0016] Step 5. Adjusting the inclination angle of the 3D printer by adjusting the height of the telescopic rod, and guiding the nozzle to move through the magnetic block in the crack to realize crack grouting repair at different positions; realizing crack grouting repair experiments at different inclination angles.

[0017] Further, in Step 3, under the condition of light visibility, one nozzle sprays the magnetic slurry, and the other nozzle sprays the curing agent; in a dark environment, one nozzle is used to spray the magnetic slurry, and the other nozzle is used to spray the magnetic photosensitive resin, and the lighting device is turned on.

[0018] Further, in Step 4, under the condition of light visibility, the nozzles for spraying the curing agent and the magnetic slurry are placed close to the magnetic block of the crack, and the repair is printed step by step along the arranged magnetic block; in a dark environment, the nozzles for spraying the magnetic photosensitive resin and the magnetic slurry are placed close to the magnetic block of the crack, and the lighting device is turned on, and the nozzles are moved along the arranged magnetic block.

[0019] Further, the concrete water-cement ratio of the magnetic slurry is 0.35-0.5, the content of magnetic powder in the weight part composition is 20%-50%, the anti-dispersant is 2%-5%, the water reducing agent is 1%-4%, the epoxy resin is 1.5%-5%, and the flocculating agent is 5%-8%, and the mixing and curing time of the magnetic slurry and the curing agent ranges from 20s to 50s.

[0020] Further, the magnetic powder accounts for 20%-30% of the mass parts in the magnetic photosensitive resin, and the resin accounts for 70%-80% of the mass parts.

[0021] The present application has the following beneficial effects:

[0022] 1. The magnetic slurry of the present application is mixed by concrete, water, water reducing agent, flocculating agent, epoxy resin, magnetic powder and anti-dispersant, and the magnetic slurry mixed by various materials aims to: the magnetic slurry is not easy to disperse underwater, the repaired structure is more solid, the fluidity is good, it is easy to flow out of the nozzle of the 3D printer, and the structure made is more accurate;

[0023] 2. The magnetic photosensitive resin of the present application is mixed by magnetic powder and photosensitive resin, which aims to: the photosensitive resin is magnetic, and it is more convenient to attract to the magnetic point;

[0024] 3. The present application fills the cracks by vacuum printing, which aims to: the air and moisture in the cracks are removed by vacuumizing the inside of the cracks, especially for the tiny cracks inside, so as to reduce the resistance effect in the printing and filling process; under the action of vacuum, a negative pressure effect is generated between the cracks and the external environment, which provides greater penetration force for the slurry, realizes the full filling of the tiny cracks and the inside of the cracks, and achieves better engineering effect for underwater structure crack repair;

[0025] 4. The height of the telescopic rod in the main body bearing frame is adjusted to adjust the inclination degree of the 3D printer, and the nozzle is moved guided by the magnetic point in the crack to realize crack grouting repair experiment at different positions and different inclination angles, which reduces the implementation difficulty and speeds up the progress;

[0026] 5. The vacuum cover structure of the present application is independently designed, which is made of transparent acrylic plate material, which not only ensures the stability of the device strength, but also realizes the visual research of printing, and is convenient for observing the seepage of the slurry in the printing process;

[0027] 6. The present application determines the vacuum degree inside the crack by observing the indication of the vacuum pressure gauge, realizes crack grouting experiment under the action of different vacuum degrees, improves the accuracy of experimental results, and determines the vacuum degree required for different crack vacuum grouting;

[0028] 7. The device is easy to make, simple to operate and low in cost, and has wide practical significance and application prospect in engineering. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall device of the present invention;

[0030] Figure 2 This is a schematic diagram of the placement of the vacuum chamber and 3D printer of the present invention;

[0031] Figure 3 This is a schematic diagram of the nozzle of the present invention;

[0032] Figure 4 This is a schematic diagram of underwater crack magnetic grouting according to the present invention;

[0033] Figure 5 This is a schematic diagram of underwater crack curing agent grouting according to the present invention;

[0034] Figure 6 This is a schematic diagram of the underwater crack magnetic photosensitive resin grouting of the present invention. Detailed Implementation

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0036] See Figures 1 to 6 A device for repairing underwater structures based on a 3D printer includes a main load-bearing frame 1. A telescopic rod 2 is provided on one side of the main load-bearing frame 1, and the other end of the telescopic rod 2 is connected to a suction cup 3 for fixing the device. A 3D printer 4 is housed inside the main load-bearing frame 1. The output end of the 3D printer 4 has multiple nozzles 5. The material input end of the 3D printer 4 is connected to the output end of a grouting device 6 via a grouting pipe 7. The grouting device 6 is connected to a vacuum pump 8. A lighting device 9 is provided on one side of the main load-bearing frame 1. This invention is easy to manufacture, simple to operate, and low in cost, and has broad practical significance and application prospects in engineering.

[0037] Preferably, the main load-bearing frame 1 comprises a support frame 1.1 and a vacuum chamber 1.2. The vacuum chamber 1.2 has the same dimensions as the 3D printer 4. A silicone pad is provided between the vacuum chamber 1.2 and the 3D printer 4. A grouting hole 1.2.1 for the grouting pipe 7 to pass through is reserved on the upper part of the vacuum chamber 1.2. The silicone pad serves to protect the 3D printer.

[0038] Preferably, the support frame 1.1 is made of stainless steel material, the vacuum cover 1.2 is made of acrylic transparent plate, and a rubber sealing layer is arranged at the orifice of the grouting hole 1.2.1. By vacuumizing the inside of the crack, the air and moisture inside the crack are removed, especially for the tiny cracks inside, thereby reducing the resistance during the printing and filling process; under the action of vacuum, a negative pressure is generated between the crack and the external environment, providing greater penetration force for the slurry, achieving sufficient filling of the tiny cracks and the inside of the cracks, and achieving better engineering effect for underwater structure crack repair.

[0039] Preferably, the nozzle 5 comprises a magnetic ring 5.1, a double-hole grouting device 5.2 and a nano isolation layer 5.3, the magnetic ring 5.1 is arranged in a surrounding manner on the nozzle 5, the double-hole grouting device 5.2 is arranged inside the nozzle 5, the output end of the double-hole grouting device 5.2 is arranged at the output end of the nozzle 5, and the nano isolation layer 5.3 is arranged below the magnetic ring 5.1. The nano isolation layer is used to isolate the magnetic slurry and prevent the magnetic slurry from running away.

[0040] Preferably, the magnetic ring 5.1 is also provided with a matched magnetic block 5.4, and the magnetic block 5.4 is used to be arranged at the required repaired structure during construction.

[0041] In addition, the application also discloses an operation method of the device for repairing underwater structure based on 3D printer, which comprises the following steps:

[0042] Step 1. Material preparation: placing the device in the operation area, arranging the magnetic block 5.4 at the required crack to be repaired, and preparing the required magnetic slurry 10 or magnetic photosensitive resin 11;

[0043] Step 2. Preparing the grouting slurry, placing the prepared magnetic slurry 10 or magnetic photosensitive resin 11 into the grouting device 6;

[0044] Step 3. Placing the 3D printer into the water, and placing the nozzle 5 for injecting the magnetic slurry 10 or magnetic photosensitive resin 11 close to the crack;

[0045] Step 4. Injecting the magnetic slurry 10 or magnetic photosensitive resin 11 into the grouting device 6, adjusting the initial grouting pressure, then injecting the magnetic slurry 10 or magnetic photosensitive resin 11 into the inside of the crack through the nozzle 5, and observing the diffusion and filling of the magnetic slurry 10 or magnetic photosensitive resin 11 in the crack under the action of different grouting pressures;

[0046] Step5. Through the height adjustment of the telescopic rod 2, the inclination angle of the 3D printer 4 is adjusted, and the nozzle 5 is guided to move by the magnetic block 5.4 in the crack to realize crack grouting repair in different positions; crack grouting repair experiments in different inclination angles are realized. By adjusting the height of the telescopic rod in the main body bearing frame, the inclination degree of the 3D printer is adjusted, and the nozzle is guided to move by the magnetic point in the crack to realize crack grouting repair experiments in different positions and different inclination angles, which reduces the implementation difficulty and speeds up the progress.

[0047] Further, in Step 3, under the condition of light visibility, one nozzle 5 sprays the magnetic slurry 10, and the other nozzle 5 sprays the curing agent 12; in the dark environment, one nozzle 5 is used to spray the magnetic slurry 10, and the other nozzle 5 is used to spray the magnetic photosensitive resin 11, and the lighting device 9 is turned on.

[0048] Further, in Step 4, under the condition of light visibility, the nozzles 5 spraying the curing agent 12 and the magnetic slurry 10 are close to the magnetic block 5.4 of the crack, and the repair is gradually printed along the set magnetic block 5.4; in the dark environment, the nozzles 5 spraying the magnetic photosensitive resin 11 and the magnetic slurry 10 are close to the magnetic block 5.4 of the crack, and the lighting device 9 is turned on, and the nozzle 5 moves along the set magnetic block 5.4.

[0049] Further, the concrete water-cement ratio in the magnetic slurry 10 is 0.35-0.5, the magnetic powder content in the weight part composition is 20%-50%, the anti-dispersant is 2%-5%, the water reducing agent is 1%-4%, the epoxy resin is 1.5%-5%, and the flocculating agent is 5%-8%, and the mixing and curing time of the magnetic slurry 10 and the curing agent 12 is 20s-50s. The magnetic slurry of the present application is mixed by concrete, water, water reducing agent, flocculating agent, epoxy resin, magnetic powder and anti-dispersant. The magnetic slurry mixed by various materials aims to: the magnetic slurry is not easy to disperse underwater, the repaired structure is more solid, the fluidity is good, it is easy to flow out of the nozzle of the 3D printer, and the structure made is more accurate.

[0050] Further, the magnetic powder accounts for 20%-30% of the mass fraction in the magnetic photosensitive resin 11, and the resin accounts for 70%-80% of the mass fraction. The photosensitive resin is rich in magnetism, which is more convenient to attract to the magnetic point.

[0051] The above embodiments are only preferred technical solutions of the present application, and should not be regarded as a limitation of the present application. The protection scope of the present application should be based on the technical solutions claimed in the claims, including equivalent replacement solutions of the technical features claimed in the claims. That is, equivalent replacement improvements within this scope are also within the protection scope of the present application.

Claims

1. An apparatus for repairing underwater structures based on a 3D printer, characterized by: The utility model relates to a kind of 3D printing equipment for crack repair, including main body load-bearing frame (1), the main body load-bearing frame (1) one side is equipped with telescopic link (2), the telescopic link (2) other end is connected with the suction disc (3) for fixing device, the main body load-bearing frame (1) inner chamber is equipped with 3D printer (4), the 3D printer (4) output is equipped with multiple nozzles (5), the 3D printer (4) material input end is connected with the output of grouting equipment (6) by grouting pipe (7), the grouting equipment (6) is connected with vacuum pump (8), the main body load-bearing frame (1) one side is equipped with lighting equipment (9), The nozzle (5) includes a magnetic ring (5.1), a double-hole grouting device (5.2), and a nano isolation layer (5.3). The magnetic ring (5.1) is arranged in a surrounding manner on the nozzle (5). The double-hole grouting device (5.2) is arranged inside the nozzle (5). The output end of the double-hole grouting device (5.2) is arranged at the output end of the nozzle (5). The nano isolation layer (5.3) is arranged below the magnetic ring (5.1). The magnetic ring (5.1) is also provided with a matching magnetic block (5.4), which is used to be arranged at the required repair structure during construction.

2. The device for repairing underwater structures based on 3D printers according to claim 1, characterized in that: The main body load-bearing frame (1) includes a support frame (1.1) and a vacuum cover (1.2). The size of the vacuum cover (1.2) is the same as that of the 3D printer (4). A layer of silica gel pad is arranged between the vacuum cover (1.2) and the 3D printer (4). A grouting hole (1.2.1) is reserved at the upper part of the vacuum cover (1.2) for the grouting pipe (7) to pass through.

3. The device for repairing underwater structures based on 3D printers according to claim 2, characterized in that: The support frame (1.1) is made of stainless steel material. The vacuum cover (1.2) is made of acrylic transparent plate. A rubber sealing layer is arranged at the hole of the grouting hole (1.2.1).

4. A method of operating the apparatus of any one of claims 1 to 3 for repairing underwater structures based on a 3D printer, characterized in that: It includes the following steps: Step 1. Material preparation: place the device in the operation area, arrange the magnetic block (5.4) at the required repair crack, and prepare the required magnetic slurry (10) or magnetic photosensitive resin (11); Step 2. Prepare the grouting slurry, and put the prepared magnetic slurry (10) or magnetic photosensitive resin (11) into the grouting equipment (6); Step 3. Put the 3D printer into water, and place the nozzle (5) for spraying the magnetic slurry (10) or magnetic photosensitive resin (11) close to the crack; Step 4. Adjust the initial grouting pressure, then inject the magnetic slurry (10) or magnetic photosensitive resin (11) into the crack through the nozzle (5), and observe the diffusion and filling of the magnetic slurry (10) or magnetic photosensitive resin (11) in the crack under different grouting pressures; Step 5. Adjust the inclination angle of the 3D printer (4) by adjusting the height of the telescopic link (2), and move the nozzle (5) guided by the magnetic block (5.4) in the crack to realize crack grouting repair at different positions; realize crack grouting repair experiment at different inclination angles.

5. The method of claim 4, wherein the method further comprises: In Step 3, one nozzle (5) sprays the magnetic slurry (10) under visible light, and the other nozzle (5) sprays the curing agent (12); in the dark environment, one nozzle (5) sprays the magnetic slurry (10), and the other nozzle (5) sprays the magnetic photosensitive resin (11), and the lighting device (9) is turned on.

6. The method of claim 5, wherein the method further comprises: In Step 4, under visible light, the nozzles (5) spraying the curing agent (12) and the magnetic slurry (10) are close to the magnetic block (5.4) of the crack, and the repair is printed along the magnetic block (5.4); in the dark environment, the nozzles (5) spraying the magnetic photosensitive resin (11) and the magnetic slurry (10) are close to the magnetic block (5.4) of the crack, and the lighting device (9) is turned on, and the nozzles (5) move along the magnetic block (5.4).

7. The method of claim 6, wherein the method further comprises: The concrete water-cement ratio of the magnetic slurry (10) is 0.35-0.5, the weight content of the magnetic powder is 20%-50%, the anti-dispersant is 2%-5%, the water reducing agent is 1%-4%, the epoxy resin is 1.5%-5%, and the flocculating agent is 5%-8%. The mixing and curing time of the magnetic slurry (10) and the curing agent (12) is 20s-50s.

8. The method of claim 4, wherein the method further comprises: The magnetic powder in the magnetic photosensitive resin (11) accounts for 20%-30% of the mass fraction, and the resin accounts for 70%-80% of the mass fraction.

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