Device and method for coating underwater heavy anti-corrosion coating

Abstract

The invention discloses an underwater heavy anti-corrosion coating coating device and method, and the device comprises a housing which is used for accommodating internal components; the pneumatic motor is installed in the shell, and the pneumatic motor receives high-pressure gas as power through an externally-connected gas supply pipeline; the end part of the transmission shaft is fixedly connected with a scraping disc for driving the scraping disc to rotate; the electric control three-way valve is located on the air supply pipeline and connected with a control module through a wire, and the control module controls starting and stopping of the pneumatic motor by controlling opening and closing of the electric control three-way valve; the paint bottle is mounted on the shell and used for containing paint; the air entraining branch is controlled by the electric control three-way valve and is used for supplying pressure to the coating bottle, so that the coating is pumped out through the coating pipe and extruded on the scraping disc; the stroke sensor is connected with the control module and controls the discharging amount of the coating according to the stroke of the trigger. The construction efficiency of the underwater coating is improved, the construction quality of the coating is improved, the effective operation time of divers is prolonged, and the waste of the coating and the pollution to the environment are reduced.

Description

Technical Field

[0001] The present invention relates to the field of corrosion and protection technology, and in particular to a coating device and method for underwater heavy-duty anti-corrosion coating. Background Art

[0002] Corrosion is one of the main issues affecting the long-term use and safety of underwater facilities. In particular, the incidence of corrosion in various underwater environments is high, and the service life of hydraulic facilities is significantly affected. Corrosion is not limited to seawater in the ocean, but also occurs in freshwater lakes, rivers and other artificial water bodies. Factors such as dissolved oxygen and corrosive ions in water accelerate the corrosion process. In these environments, structures exposed to water for a long time, such as dams, bridge foundations, underwater gates, water intake facilities, etc., are facing serious corrosion threats. Lack of maintenance will lead to decreased material strength, shortened service life and increased maintenance costs. In order to slow down the corrosion of underwater structures, heavy anti-corrosion coatings have been widely used as an effective means of protection on the surface of structures. However, traditional underwater coating operations are mainly completed manually. Divers dive underwater and use manual brushes and scrapers to perform coating operations. They frequently dip the paint underwater and rely on manual control to apply the pre-mixed anti-corrosion paint to the surface of the substrate.

[0003] Divers face multiple challenges in underwater manual painting in practice. The underwater operating environment is highly restrictive. Not only is it inconvenient for divers to move underwater and their vision is obstructed, but they are also unable to fully and accurately observe the construction surface during painting. At the same time, the efficiency of manual brushing is extremely low, and the quality of the coating is difficult to guarantee. The underwater operation process is difficult to be uniform and stable, and the coating thickness is not easy to accurately control. It is easy to have uneven coating and uneven thickness, which in turn affects the protective effect and service life of the coating. In addition, the fluid medium underwater can cause the paint to be lost during the transmission and application process, which not only causes material waste, but the dispersion of the paint may also pollute the surrounding water bodies. At the same time, the interference of water flow, impurities, floating objects and aquatic organisms during construction all bring additional difficulties to the operation. The high pressure in the underwater environment can also affect the adhesion and curing of the paint, making it more difficult to dry and shape the coating.

[0004] In the prior art, although there are some underwater anti-corrosion coating construction devices, they generally have problems such as complex structure, inconvenient operation, and unsatisfactory construction effect, which cannot meet the actual application needs. For example, CN204953231U discloses an underwater paint brushing device, which uses a static mixing valve to mix the paint, and uses a wireless remote control switch to control the rotation speed of two combined gear pumps to adjust the extrusion speed of the material. When constructing under harsh underwater conditions, there is a large loss and delay in the wireless signal, which makes the construction adjustment of the device insensitive. The paint is mixed immediately after use, and the paint maturation process is missing in the underwater heavy anti-corrosion paint, which affects the anti-corrosion effect of the coating. CN108745807A discloses a waterproof paint brushing device, which uses air pressure as power to pump the paint from the paint box to the brush head through the pipeline, but the brush head still needs to be manually brushed. Under water, the manual brushing action is not easy to complete, which will greatly affect the construction efficiency.

[0005] As mentioned above, there is an urgent need for an underwater heavy-duty anticorrosive coating construction device with a simple structure, convenient operation, and excellent construction effect, so as to improve the efficiency of underwater construction and coating quality, reduce material waste, and ensure that the coating is evenly attached to the surface of the substrate. At the same time, the device should have the ability to adapt to the changing underwater environment, be able to work stably under load water pressure conditions, and reduce the impact of external interference on the coating effect. Summary of the invention

[0006] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide a coating device and method for underwater heavy-duty anti-corrosion coatings to solve the problems of low construction efficiency, poor coating quality, inconvenience in pre-cleaning of attachments on the working surface, easy drifting of coatings during the coating process, large material waste and pollution to water bodies in the current underwater coating construction.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions: A coating device for underwater heavy-duty anti-corrosion coating, comprising: A housing for accommodating internal components, with a paint bottle containing paint and a trigger mounted on the housing; A pneumatic motor is installed in the housing, and the pneumatic motor receives high-pressure gas as power through an externally connected air supply pipeline; The transmission shaft has a scraper plate fixedly connected to the end thereof, and is used to transmit the power generated by the pneumatic motor to the scraper plate to drive the scraper plate to rotate; The electric-controlled three-way valve is located on the air supply pipeline and is connected to a control module through a wire. The control module controls the start and stop of the pneumatic motor by controlling the opening and closing of the electric-controlled three-way valve; A paint bottle is installed on the shell and is used to contain the paint; The air bleed branch is controlled by an electrically controlled three-way valve and is used to supply pressure to the paint bottle so that the paint is pumped out through the paint pipe and squeezed onto the scraper plate; The stroke sensor is connected to the control module and controls the amount of paint discharged according to the stroke of the trigger.

[0008] Furthermore, the shell is made of polymer, the scraper is made of high polymer material and is equipped with a blocking ring. The shell is fixedly connected to a cover body that matches the scraper. The cover body covers the back and sides of the scraper. There is a gap between the cover body and the scraper. The end of the paint tube is installed on the cover body, and the transmission shaft is rotatably connected to the cover body.

[0009] Furthermore, the scraper is provided with a through hole for the paint to pass through, and the scraper blades are arranged obliquely with respect to the transmission shaft.

[0010] Furthermore, the paint bottle is threadedly connected to the outer shell, the paint bottle is made of transparent high-polymer plastic, can withstand an air pressure of no less than 400 kPa, and the inner wall is made of a smooth hydrophilic and oleophobic material.

[0011] Furthermore, the trigger is a two-stage trigger with a locking position. When it is pulled to the locking position, the air circuit of the pneumatic motor is opened, the scraper rotates but the paint is not pumped out; when the trigger is continued to be pulled, the air intake volume of the feeding system is controlled according to the trigger stroke, and the amount of paint pumped out is changed.

[0012] Furthermore, the control module and the travel sensor are connected to a battery, and the battery is arranged in a battery compartment in the housing. The battery compartment is opened by a flap, and No. 2 batteries are used. There are sealing strips around the flap.

[0013] The present invention also provides a method for coating an underwater heavy-duty anti-corrosion coating, using the coating device as described above, comprising the following steps: S1. Put the prepared paint into the paint bottle and connect it to the coating device housing through threads; S2. Connect the high-pressure gas source to the coating device through an external gas supply pipeline and start the gas supply; S3, pull the trigger to the locking position, so that the air motor starts and the scraper starts to rotate; S4. Continue to pull the trigger, monitor the stroke through the stroke sensor, and the control module controls the electronically controlled three-way valve to adjust the gas flow of the air branch, so as to accurately control the pumping amount of the paint. The paint is squeezed into the cover body through the paint pipe, and then squeezed into the scraper and its surroundings through the gap between the cover body and the scraper and the through hole on the scraper; S5. During the rotation of the scraper, the paint is evenly dispersed on the surface of the substrate and evenly applied by brushing and scraping to complete the coating process.

[0014] Furthermore, during the coating process, if it is necessary to stop working or replace consumables, release the trigger to the locking position, cut off the air supply of the air branch, and stop pumping out the paint; further release the trigger, cut off the air supply of the pneumatic motor, and stop the scraper from rotating; then disconnect the air circuit and remove the paint bottle, check the solidification of the paint in the paint tube, and replace the paint tube and paint bottle if necessary.

[0015] Furthermore, when the device runs out of power, stop the device and remove it from the water, disconnect the gas line and remove the paint bottle as described above, open the battery compartment flap, replace the battery, ensure that there is no water in the battery compartment, close the flap, reconnect the gas line, and test whether the device functions normally.

[0016] Compared with the prior art, the present invention has the following beneficial effects: The present invention uses an underwater heavy-duty anti-corrosion coating coating device driven by a pneumatic motor, which can automatically complete the loading and scraping processes under underwater conditions. The start and stop of the scraping action and the amount of coating loaded can be controlled by a trigger. The scraper can be used to pre-clean attachments on the working surface without loading and without changing equipment. The scraper is surrounded by a blocking ring, which can semi-enclose the coating in the scraper, preventing the coating from drifting due to centrifugal force during the coating process, thereby improving the construction efficiency of the underwater coating, improving the construction quality of the coating, extending the effective working time of divers, and reducing the waste of coating and pollution to the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings and embodiments: Figure 1 It is a schematic diagram of a cutaway structure provided by an embodiment of the present invention.

[0018] Explanation of the reference numerals: housing 1, pneumatic motor 2, air supply pipeline 3, transmission shaft 4, scraper 5, electric-controlled three-way valve 6, control module 7, stroke sensor 8, air branch 9, paint bottle 10, paint tube 11, trigger 12, battery compartment 13, cover 14, through hole 15. DETAILED DESCRIPTION

[0019] The technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0020] Embodiment 1 See also Figure 1 , a coating device for underwater heavy anti-corrosion coating, comprising: The housing 1 is fixedly connected with a cover 14 that matches with the scraper 5. The cover 14 covers the back and side of the scraper 5. There is a gap between the cover 14 and the scraper 5. The end of the paint tube 11 is mounted on the cover 14. The transmission shaft 4 is rotatably connected with the cover 14. The cover 14 matches with the scraper 5, so that the paint is squeezed into the surroundings of the scraper 5 from the gap of the cover 14, and the paint is applied by the rotating scraper 5, which is convenient to use.

[0021] Embodiment 2 Based on the first embodiment, Figure 1 As shown, the scraper 5 is provided with a through hole 15 through which the paint passes, and the scraper 5 blades are arranged obliquely with the transmission shaft 4. The through hole 15 on the scraper 5 increases the paint squeezing into the surface of the scraper 5, and the obliquely arranged scraper 5 makes the scraper 5 coating more uniform and dense.

[0022] Embodiment 3 Based on the first embodiment, Figure 1 As shown, the paint bottle 10 is threadedly connected to the housing 1 , and the paint bottle 10 is made of transparent high-polymer plastic, can withstand an air pressure of no less than 400 kPa, and the inner wall is made of a smooth hydrophilic and oleophobic material.

[0023] In this embodiment, the control module 7 and the travel sensor 8 are connected to a battery, and the battery is arranged in a battery compartment 13 in the housing 1. The battery compartment 13 is opened by a flap, and No. 2 batteries are used. There are sealing strips around the flap.

[0024] Embodiment 4 Based on the first embodiment, Figure 1 As shown, the trigger 12 is a two-stage trigger with a locking position. When the trigger 12 is pulled to the locking position, the air circuit of the pneumatic motor 2 is opened, and the scraper 5 rotates but does not pump out the paint; when the trigger 12 is continuously pulled, the air intake amount of the feeding system is controlled according to the stroke of the trigger 12, and the amount of paint pumped out is changed. It is easy to operate and makes it more convenient to extrude the paint.

[0025] Embodiment 5 The present invention also provides a method for coating an underwater heavy-duty anti-corrosion coating, using the above-mentioned coating device, comprising the following steps: S1, put the prepared paint into the paint bottle 10, and connect it to the coating device housing 1 through threads; S2, connecting the high-pressure gas source to the coating device through the external gas supply pipeline 3, and starting the gas supply; S3, pull the trigger 12 to the locking position, so that the pneumatic motor 2 starts and the scraper 5 starts to rotate; S4, continue to pull the trigger 12, monitor the stroke through the stroke sensor 8, and the control module 7 controls the electronically controlled three-way valve 6 to adjust the gas flow of the air bleed branch 9, so as to accurately control the pumping amount of the paint, and the paint is squeezed into the cover body 14 through the paint pipe 11, and then squeezed into the scraper 5 and its surroundings through the gap between the cover body 14 and the scraper 5 and the through hole 15 on the scraper 5; S5, during the rotation of the scraper 5, the coating is evenly dispersed on the surface of the substrate and evenly applied and scraped to complete the coating process.

[0026] In this embodiment, during the coating process, if it is necessary to stop working or replace consumables, release the trigger 12 to the locking position, cut off the air supply of the air branch 9, and stop pumping out the paint; further release the trigger 12, cut off the air supply of the pneumatic motor 2, and stop the scraper 5 from rotating; then disconnect the air circuit and remove the paint bottle 10, check the solidification of the paint in the paint tube 11, and replace the paint tube 11 and the paint bottle 10 if necessary.

[0027] In this embodiment, when the device runs out of power, the device is stopped and taken out of water, the gas circuit is disconnected and the paint bottle 10 is removed according to the above method, the battery compartment 13 flap is opened, the battery is replaced, and after ensuring that there is no water in the battery compartment 13, the flap is closed, the gas circuit is reconnected, and the device is tested to see whether it functions normally.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the purpose and scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. An underwater heavy-duty anti-corrosion coating coating device, characterized in that: include: A housing for accommodating internal components, with a paint bottle containing paint and a trigger mounted on the housing; A pneumatic motor is installed in the housing, and the pneumatic motor receives high-pressure gas as power through an externally connected air supply pipeline; The transmission shaft has a scraper plate fixedly connected to the end thereof, and is used to transmit the power generated by the pneumatic motor to the scraper plate to drive the scraper plate to rotate; The electric-controlled three-way valve is located on the air supply pipeline and is connected to a control module through a wire. The control module controls the start and stop of the pneumatic motor by controlling the opening and closing of the electric-controlled three-way valve; A paint bottle is installed on the shell and is used to contain the paint; The air bleed branch is controlled by an electrically controlled three-way valve and is used to supply pressure to the paint bottle so that the paint is pumped out through the paint pipe and squeezed onto the scraper plate; The stroke sensor is connected to the control module and controls the amount of paint discharged according to the stroke of the trigger.

2. The coating device of an underwater heavy-duty anti-corrosion coating according to claim 1 is characterized in that: The shell is made of polymer, the scraper is made of high polymer material and is equipped with a blocking ring. A cover body that matches the scraper is fixedly connected to the shell. The cover body covers the back and sides of the scraper, and there is a gap between the cover body and the scraper. The end of the paint tube is installed on the cover body, and the transmission shaft is rotatably connected to the cover body.

3. The coating device of an underwater heavy-duty anti-corrosion coating according to claim 2 is characterized in that: The scraper is provided with a through hole for the paint to pass through, and the scraper blades are arranged obliquely with the transmission shaft.

4. The coating device of an underwater heavy-duty anti-corrosion coating according to claim 1 is characterized in that: The paint bottle is threadedly connected to the outer shell, and is made of transparent high-polymer plastic, which can withstand an air pressure of no less than 400 kPa, and the inner wall of the paint bottle is made of a smooth hydrophilic and oleophobic material.

5. The coating device of an underwater heavy-duty anti-corrosion coating according to claim 4, characterized in that: The trigger is a two-stage trigger with a locking position. When it is pulled to the locking position, the air circuit of the pneumatic motor is opened, the scraper rotates but the paint is not pumped out; when the trigger is continuously pulled, the air intake amount of the feeding system is controlled according to the trigger stroke, and the amount of paint pumped out is changed.

6. The coating device of an underwater heavy-duty anti-corrosion coating according to claim 1, characterized in that: The control module and the travel sensor are connected with a battery, and the battery is arranged in a battery compartment in the housing. The battery compartment is opened by a flap, and No. 2 batteries are used. There are sealing strips around the flap.

7. A method for coating an underwater heavy-duty anticorrosive coating, characterized in that: Using the coating device as described in claims 1 to 6, comprising the following steps: S1. Put the prepared paint into the paint bottle and connect it to the coating device housing through threads; S2. Connect the high-pressure gas source to the coating device through an external gas supply pipeline and start the gas supply; S3, pull the trigger to the locking position, so that the air motor starts and the scraper starts to rotate; S4. Continue to pull the trigger, monitor the stroke through the stroke sensor, and the control module controls the electronically controlled three-way valve to adjust the gas flow of the air branch, so as to accurately control the pumping amount of the paint. The paint is squeezed into the cover body through the paint pipe, and then squeezed into the scraper and its surroundings through the gap between the cover body and the scraper and the through hole on the scraper; S5. During the rotation of the scraper, the paint is evenly dispersed on the surface of the substrate and evenly applied by brushing and scraping to complete the coating process.

8. The method for coating an underwater heavy-duty anticorrosive coating according to claim 7, characterized in that: During the coating process, if you need to stop working or replace consumables, release the trigger to the locking position, cut off the air supply to the air branch, and stop pumping out the paint; further release the trigger to cut off the air supply to the pneumatic motor and stop the scraper from rotating; then disconnect the air line and remove the paint bottle, check the solidification of the paint in the paint tube, and replace the paint tube and paint bottle if necessary.

9. The method for coating an underwater heavy-duty anticorrosive coating according to claim 8, characterized in that: When the device runs out of power, stop the device and remove it from the water, disconnect the gas line and remove the paint bottle as described above, open the battery compartment flap, replace the battery, make sure there is no water in the battery compartment, close the flap, reconnect the gas line, and test whether the device functions normally.

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