A special brush device for underwater

Abstract

The application relates to the technical field of brushing devices, and provides a special underwater brushing device, which comprises an overwater storage and conveying mechanism, a underwater brushing execution mechanism and a discharging driving mechanism installed on the storage tank and connected with the storage tank. The storage tank is provided with a discharging port. The underwater brushing execution mechanism comprises a coating dispensing structure and brush hairs connected to the coating dispensing structure. The coating dispensing structure comprises a fixed shell and a material passing cavity formed in the fixed shell. The inlet of the material passing cavity is connected with the discharging port of the storage tank through a conveying pipeline, and the outlet of the material passing cavity leads to the brush hairs. The discharging driving mechanism can drive the coating in the storage tank to flow out of the discharging port and then flow onto the brush hairs through the conveying pipeline, the inlet of the material passing cavity and the outlet of the material passing cavity in sequence. The special underwater brushing device can improve the underwater brushing operation efficiency and improve the brushing quality.

Description

Technical Field

[0001] This application relates to the field of coating device technology, and more specifically, to a coating device specifically designed for underwater use. Background Technology

[0002] Underwater steel structures (such as ship hulls, offshore platforms, underwater pipelines, and bridge piers) are exposed to marine or freshwater environments for extended periods. Due to electrochemical corrosion, marine organism attachment, and water erosion, their surface anti-corrosion coatings are highly susceptible to damage and aging, requiring regular underwater coating maintenance. Underwater coating operations are a crucial step in ensuring the long-term safe operation of underwater steel structures, and their construction quality directly affects the service life and reliability of the facilities. Currently, existing technologies commonly employ manual brushing methods in underwater coating construction. However, this manual brushing method has the following drawbacks:

[0003] 1. Manual painting involves a diver carrying the underwater coating material in one hand and a brush in the other while diving underwater to apply it. During the painting process, the diver repeatedly dips the brush into the coating material container before applying it. This process of dipping and applying the material results in material waste, increasing material costs, and the wasted paint also has a certain impact on water quality.

[0004] 2. Divers have to repeatedly dip a brush into the solvent container to apply the coating material. To avoid wasting too much material, they must rotate the brush while dipping to allow excess material to fall into the container. This process is time-consuming. Furthermore, the amount of paint applied each time is small, resulting in a limited area that can be covered each time, making the work inefficient.

[0005] 3. Divers have to repeatedly dip a brush into the material in the bucket and apply it. Material that falls around the divers adheres to their hands and wetsuits, severely hindering underwater operations. Paint on the wetsuits is also very difficult to clean. After several applications, the wetsuits have to be scrapped, further increasing project costs.

[0006] 4. When divers are working underwater, their stability, control, and flexibility are already affected by buoyancy. While underwater, divers have to hold the material bucket in one hand and apply the coating with the other, and they cannot control the amount of material they apply each time. This not only affects the efficiency of underwater work but also the control of the divers' underwater coating movements, resulting in inconsistent coating thickness and affecting the coating quality.

[0007] 5. Divers need to repeatedly dip a brush into the material in the bucket and apply it. During the entire application process, the underwater coating material is in full contact with water, which causes a large number of water molecules to mix into the coating material. As a result, some bubbles and water blisters will be generated in the coating after application, which reduces the performance of the underwater coating material itself and affects the waterproof and anti-corrosion effect. Summary of the Invention

[0008] In view of this, this application provides a special underwater painting device to solve the technical problems of low efficiency and easy impact on painting quality in existing underwater painting operations.

[0009] This application provides an underwater-specific coating device, wherein the underwater-specific coating device includes: A waterborne material storage and conveying mechanism includes a material storage tank and a discharge drive mechanism installed in the material storage tank, wherein the material storage tank has a discharge port; An underwater coating actuator includes a paint dispensing structure and brush bristles connected to the paint dispensing structure. The paint dispensing structure includes a fixed housing and a material passage chamber formed within the fixed housing. The inlet of the material passage chamber is connected to the outlet of a storage tank via a conveying pipe, and the outlet of the material passage chamber leads to the brush bristles. A discharge driving mechanism can drive the paint in the storage tank to flow out from the outlet and sequentially pass through the conveying pipe, the inlet of the material passage chamber, and the outlet of the material passage chamber to flow onto the brush bristles.

[0010] Further, the fixed housing includes a side housing and a bottom housing connected to the inner side of the lower end of the side housing. A top cover is detachably installed on the upper end of the side housing. The inlet of the material passage cavity is formed on the top cover. The first surface of the bottom housing faces the top cover, and the second surface of the bottom housing faces the outside of the fixed housing. The bottom housing is provided with a plurality of distribution channels extending from the first surface to the second surface. The first surface of the bottom housing, the top cover, and the side housing enclose the material passage cavity. The second surface of the bottom housing and the side housing enclose an open bristle mounting cavity. One end of the bristle is connected to the second surface of the bottom housing, and the other end of the bristle extends out of the open cavity.

[0011] Furthermore, the fixed housing comprises two half-shells that are detachably connected to each other.

[0012] Furthermore, the plurality of distribution channels are arranged at equal intervals along the length of the fixed housing, and the diameter of each distribution channel is the same.

[0013] Furthermore, the upper cover is connected to a handle tube, one end of which is connected to the inlet of the material passage chamber, and the other end of which is connected to the conveying pipe. The handle tube is a rigid tube, and the conveying pipe is a flexible tube.

[0014] Furthermore, the discharge drive mechanism includes a piston slidably disposed in the storage bin and a power device that drives the piston. The power device is a motor, a pneumatic mechanism, or a hydraulic mechanism, and the power device can drive the piston to reciprocate within the storage bin.

[0015] Further, the bottom housing includes a bottom housing wall and a switching rotating column. A rotating receiving cavity is formed on the bottom housing wall, extending from the first surface to the second surface. The switching rotating column is rotatably installed in the rotating receiving cavity and is axially limited within the rotating receiving cavity. Multiple sets of distribution channels are formed on the switching rotating column. Each set of distribution channels includes multiple distribution channels arranged radially at intervals along the switching rotating column. A blocking block is provided in the material passage cavity. The first port of the distribution channel faces the material passage cavity, and the second port of the distribution channel faces the bristle mounting cavity. When the switching rotating column rotates in the rotating receiving cavity, it can put one set of distribution channels in a working position and put the other sets of distribution channels in a non-working position. The first port of the distribution channel in the working position is connected to the material passage cavity, and the first port of the distribution channel in the non-working position is blocked by the blocking block and isolated from the material passage cavity.

[0016] Furthermore, an elastic retaining mechanism is provided in the rotating receiving cavity, and the distribution channel is formed as an inclined channel. When the paint enters from the first port and flows out from the second port through the inclined channel, it can generate a horizontal decomposition force that causes the corresponding switching rotating column to rotate in the first direction. When the horizontal decomposition force is less than a predetermined value, the elastic retaining mechanism holds the switching rotating column in a position where one group of distribution channels is in the working position and the other groups of distribution channels are in the non-working position. When the horizontal decomposition force is greater than or equal to the predetermined value, the switching rotating column can overcome the elastic force of the elastic retaining mechanism and rotate in the first direction under the action of the horizontal decomposition force until the next group of distribution channels is in the working position, at which point the switching rotating column is held in place by the elastic retaining mechanism.

[0017] Furthermore, an elastic element receiving hole is formed on the cavity wall of the rotating receiving cavity corresponding to the bottom shell wall. The elastic retaining mechanism includes a spring and a locking head disposed in the elastic element receiving hole. The side wall of the switching rotating column has a locking groove for the locking head to be inserted and engaged. When the switching rotating column is held and fixed by the elastic retaining mechanism, the spring causes the locking head to extend out of the elastic element receiving hole and engage in the locking groove.

[0018] Furthermore, multiple rotating cavities are arranged at intervals along the length of the bottom shell, and a first set of distribution channel groups and a second set of distribution channel groups are formed on the switching rotating column. The first set of distribution channel groups includes two distribution channels arranged at intervals along a first radial direction of the switching rotating column, and the second set of distribution channel groups includes two distribution channels arranged at intervals along a second radial direction of the switching rotating column. The first radial direction is perpendicular to the second radial direction, and the diameter of each distribution channel in the same set of distribution channel groups is the same. The diameter of each distribution channel in the first set of distribution channel groups is the same as the diameter of each distribution channel in the second set of distribution channel groups.

[0019] The beneficial effects of the underwater-specific coating device provided in this application are as follows: 1. The underwater coating device provided in this application solves the problem of divers needing to repeatedly dip the coating material during manual underwater coating, avoiding material loss during dipping and coating processes, reducing material costs, and minimizing water pollution from the coating. For the same area, it significantly reduces the underwater working time for divers, improves underwater coating efficiency, further reduces project costs, and ensures coating quality.

[0020] 2. The underwater special coating device provided in this application continuously supplies material through a delivery pipeline, eliminating the need for divers to repeatedly dip the material and rotate the brush, thus greatly saving construction time, allowing for a large single coating area and significantly improving construction efficiency.

[0021] 3. The underwater-specific coating device provided in this application avoids the problem of paint adhering to the diver's hands and diving suit, protecting the diver's safety and comfort during underwater operations, while also preventing the diving suit from being ruined due to paint residue, thus reducing engineering costs.

[0022] 4. The underwater-specific painting device provided in this application allows divers to focus on painting operations without having to carry material buckets, improving the stability and flexibility of underwater operations. At the same time, the distribution channels enable uniform material supply, ensuring consistent coating thickness and improving coating quality.

[0023] 5. The underwater special coating device provided in this application can complete the feeding process of the brush bristles in a sealed state, eliminating the need to repeatedly dip the brush into the bucket to apply the material. This avoids the formation of bubbles and blisters due to the large amount of water molecules mixed in the coating, ensuring the coating performance and improving the waterproof and anti-corrosion effect. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a simplified schematic diagram of an underwater-specific coating device according to an embodiment of this application; Figure 2 This is a simplified schematic diagram of an underwater-specific coating device according to another embodiment of this application; Figure 3 This is a perspective view of the underwater coating actuator in an underwater-specific coating device according to an embodiment of this application; Figure 4 This is a perspective view of the paint distribution structure in an underwater-specific painting device according to an embodiment of this application; Figure 5 This is another perspective view of the paint distribution structure in an underwater-specific painting device according to an embodiment of this application; Figure 6 This is a perspective view of a half-shell in an underwater-specific coating device according to an embodiment of this application; Figure 7 This is a perspective view of the paint distribution structure in an underwater-specific painting device according to another embodiment of this application; Figure 8 This is a perspective view of a portion of the paint dispensing structure in an underwater-specific painting device according to another embodiment of this application; Figure 9 This is a schematic diagram of the assembly of a component in an underwater-specific coating device according to another embodiment of this application; Figure 10 for Figure 9 Enlarged view of point A in the middle; Figure 11 This is a schematic diagram illustrating the engagement of another component in an underwater-specific coating device according to another embodiment of this application; Figure 12 for Figure 11 Enlarged view of point B in the middle; Figure 13 This is a top view of the switching rotating column in an underwater-specific coating device according to another embodiment of this application; Figure 14 For along Figure 13 A cross-sectional view taken along line AA.

[0026] Explanation of reference numerals in the attached figures: 1-Pressure gauge; 2-Brush bristles; 3-Conveying pipe; 4-Top cover; 5-Handle tube; 6-Regulating valve; 7-Piston; 8-Motor; 9-Fixed bracket; 10-Threaded rod; 11-Pneumatic control system; 12-Block; 13-Spring; 14-Clipper; 15-Piston rod; 16-Lubricating ball; 100-Fixed housing; 101-Passing chamber; 102-Side housing; 103-Bottom housing; 104-Distribution channel; 105-Brush bristle mounting chamber; 106-Bottom housing wall; 107-Switching rotating column; 108-Rotating receiving chamber; 109-Protruding ring; 110-Annular groove; 111-Elastic element receiving hole; 112-Slot; 113-Mounting hole; 200-Storage box; 201-Discharge port; 202-Rod-type chamber; 203-Rodless chamber. Detailed Implementation

[0027] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings. One or more embodiments of this application are exemplarily shown in the drawings to provide a more accurate and thorough understanding of the technical solutions disclosed herein. However, it should be understood that this application can be implemented in many different forms and is not limited to the embodiments described below.

[0028] In the accompanying drawings of this application, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this application. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] Furthermore, if the embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, features defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously.

[0030] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0031] See Figures 1 to 6 This application provides an underwater-specific coating device, wherein the underwater-specific coating device includes: The waterborne material storage and conveying mechanism includes a storage tank 200 and a discharge drive mechanism installed on the storage tank 200. The storage tank 200 has a discharge port 201. The waterborne material storage and conveying mechanism can be placed on the water surface or carried to the work surface by a submarine or robot. Of course, the storage tank 200 also has a feed port for replenishing the storage tank 200 with paint for brushing. The storage tank 200 can be equipped with a pressure gauge 1. The underwater painting actuator includes a paint dispensing structure and brush bristles 2 connected to the paint dispensing structure. The paint dispensing structure includes a fixed housing 100 and a material passage chamber 101 formed within the fixed housing 100. The inlet of the material passage chamber 101 is connected to the outlet 201 of the storage tank 200 via a conveying pipe 3. The conveying pipe 3 can be large or small, typically with an inner diameter of 4 mm to 20 mm (but is not limited to this). The outlet of the material passage chamber 101 leads to the brush bristles 2. The discharge drive mechanism can drive the paint in the storage tank 200 to flow out from the outlet 201 and sequentially pass through the conveying pipe 3, the inlet of the material passage chamber 101, and the outlet of the material passage chamber 101 to flow onto the brush bristles 2. The underwater painting actuator can be operated by a diver or an underwater robot and can perform painting operations directly underwater.

[0032] In the underwater coating device provided in this application, the paint in the storage tank 200 is driven by a discharge drive mechanism to flow out from the discharge port 201, and then sequentially flows through the conveying pipe 3, the inlet of the conveying chamber 101, and the outlet of the conveying chamber 101 to the brush bristles 2. Divers can hold the underwater coating actuator and use the paint-laden brush bristles 2 to apply the paint to the underwater target. During this process, the paint is continuously delivered from the storage tank 200 above water to the brush bristles 2 underwater via the discharge drive mechanism, eliminating the need for repeated dipping and significantly improving underwater coating efficiency. Furthermore, during the coating process, the paint is conveyed through the conveying pipe 3 directly to the brush bristles 2 and applied to the work surface, with almost no intermediate loss, saving coating material, reducing waste, protecting water quality, and avoiding the problem of divers repeatedly dipping brushes in the tank and applying paint, which would cause paint to fall around the divers and adhere to their hands and diving suits. Furthermore, the underwater-specific coating device provided in this application helps improve coating quality. This invention directly and continuously supplies material to the brush bristles 2 via the delivery pipe 3, avoiding the problem of water molecules mixing into the coating and causing bubbles and blisters, thus ensuring coating performance. Simultaneously, divers can focus on the coating operation without needing to carry the material bucket, resulting in more stable and flexible movements and facilitating uniform coating. Finally, because the coating material is transported entirely within the delivery pipe 3 in the underwater-specific coating device provided in this application, the coating material will not adhere to the diver's hands and wetsuit due to repeated brushing with the bucket, protecting the wetsuit and reducing engineering costs.

[0033] According to one embodiment of this application, the fixed housing 100 includes a side housing 102 and a bottom housing 103 connected to the inner side of the lower end of the side housing 102. A top cover 4 is detachably mounted on the upper end of the side housing 102. The inlet of the material passage chamber 101 is formed on the top cover 4. The first surface of the bottom housing 103 faces the top cover 4, and the second surface of the bottom housing 103 faces the outside of the fixed housing 100. The bottom housing 103 is provided with a plurality of distribution channels 104 extending from the first surface to the second surface (the plurality of distribution channels 104 form a paint distribution structure). The first surface of the bottom housing 103, together with the top cover 4 and the side housing 102, encloses the material passage chamber 101. The second surface of the bottom housing 103, together with the side housing 102, encloses an open brush mounting cavity 105. One end of the brush bristles 2... Connected to the second surface of the bottom housing 103, the other end of the bristles 2 extends outwards. The length of the bristles extending outwards can vary, from 1 cm to 10 cm or longer. The bristles 2 can be animal bristles or fibers made of synthetic materials. Preferably, multiple distribution channels 104 are arranged at equal intervals along the length of the fixed housing 100, and the diameter of each distribution channel 104 is the same. In this way, the paint in the feed chamber 101 is evenly delivered to different positions of the bristles 2 through the evenly distributed distribution channels 104, ensuring that each part of the bristles 2 receives sufficient paint. This avoids the phenomenon of more paint in the center of the bristles 2 and less paint at the edges in traditional brushing, thus ensuring the uniformity and consistency of the coating thickness. In addition, the detachable design of the top cover 4 allows the feed chamber 101 and the distribution channels 104 to be opened for cleaning and maintenance. Because the coating used for underwater application has a certain viscosity and curing characteristics, it may clog the distribution channel 104 or adhere to the inner wall of the material passage 101 after long-term use. The removable top cover 4 allows operators to easily clean the material passage 101 and the distribution channel 104, ensuring the long-term reliable operation of the device.

[0034] In another embodiment, instead of providing multiple distribution channels 104 (paint distribution structure), a single general paint outlet channel leads to the brush bristles 2.

[0035] According to one embodiment of this application, the fixed housing 100 is a metal structure or a plastic structure.

[0036] According to one embodiment of this application, plastic pipes, copper pipes, or pipes of other materials may be pre-embedded in each distribution channel 104.

[0037] According to one embodiment of this application, the fixed housing 100 includes two half-shells detachably connected to each other. Specifically, the two half-shells can be connected by screws or adhesive, and each half-shell has mounting holes 113 for screw installation. Preferably, by screw installation, the gaps can be filled with sealant. The two half-shells can be arranged either along the length or width of the fixed housing 100. The detachable structure of the two half-shells allows operators to easily open the fixed housing 100 for thorough cleaning and maintenance of the interior.

[0038] According to one embodiment of this application, the upper cover 4 is connected to a handle tube 5. One end of the handle tube 5 is connected to the inlet of the material passage chamber 101, and the other end of the handle tube 5 is connected to the conveying pipe 3. The handle tube 5 is a rigid tube, and the conveying pipe 3 is a flexible tube. The rigid handle tube 5 can be used as an operating handle and also serves as part of the pipeline for conveying paint.

[0039] According to one embodiment of this application, a regulating valve 6 may be installed on the delivery pipe 3 or the handle pipe 5. The regulating valve 6 may be manual or electronic, and has both on / off control and flow control functions.

[0040] According to one embodiment of this application, the discharge drive mechanism includes a piston 7 slidably disposed within a storage bin 200 and a power device that drives the piston 7. The power device is a motor 8, a pneumatic mechanism, or a hydraulic mechanism. The power device can drive the piston 7 to reciprocate within the storage bin 200. Specifically, when the power device is a motor 8, the motor 8 is connected to the outside of the storage bin 200 via a fixing bracket 9. A threaded rod 10 is coaxially connected to the output shaft of the motor 8. The threaded rod 10 has external threads and extends into the storage bin 200. The piston 7 has an internal threaded hole that is threadedly connected to the external threads of the threaded rod 10. The piston 7 is rotated and limited within the storage bin 200. When the motor 8 is started, the motor 8 drives the threaded rod 10 to rotate. Similar to the principle of a screw and nut mechanism, the piston 7 reciprocates within the storage bin 200 along the threaded rod 10. In addition, a mounting plate can be installed on the threaded rod 10. A labor-saving turntable can be installed, or the turntable can be manually rotated to rotate the threaded rod 10, thereby causing the piston 7 to slide back and forth along the threaded rod 10 within the storage box 200. When the power device is a cylinder, the piston rod 15 of the piston 7 extends out of the storage box 200. The chamber in the storage box 200 that contacts the piston rod 15 is called the rod chamber 202, and the chamber in the storage box 200 located on the side of the piston 7 away from the piston rod 15 is called the rodless chamber 203. The rod chamber 202 is connected to the pneumatic control system 11, which can supply or evacuate air to the rod chamber 202 to cause the piston 7 to slide back and forth within the storage box 200. The inlet and outlet 201 of the storage box 200 are connected to the rodless chamber 203. In both examples, when the piston 7 compresses the chambers where the inlet and outlet 201 are located, it can force the paint in the chambers where the inlet and outlet 201 are located out of the outlet 201. At this time, it should be ensured that the inlet is closed.

[0041] In another embodiment, piston 7 can be omitted, and air pressure can be directly connected into the storage tank 200 to directly force the paint out from the outlet 201 of the storage tank 200.

[0042] The underwater-specific coating device provided in the embodiments of this application is completed in a sealed state from pressure supply, pressure application, to the output of coating to the brush bristles 2.

[0043] See Figures 7 to 14According to one embodiment of this application, the bottom housing 103 includes a bottom housing wall 106 and a switching rotation column 107. A rotation receiving cavity 108 is formed on the bottom housing wall 106, extending from a first surface to a second surface. The switching rotation column 107 is rotatably mounted in the rotation receiving cavity 108 and is axially limited within the rotation receiving cavity 108. Specifically, a protruding ring 109 is provided on the outer circumferential surface of the switching rotation column 107, and an annular groove 110 is provided on the cavity wall of the rotation receiving cavity 108. The protruding ring 109 and the annular groove 110 are located on both sides of the switching rotation column 107 along the axial direction. Multiple lubricating balls 16 can be arranged between the corresponding groove walls to make the rotation of the switching rotating column 107 smoother. The convex ring 109 is rotatably accommodated in the annular groove 110 along the axis of the switching rotating column 107. The convex ring 109 is limited by the annular groove 110 in the axial direction of the switching rotating column 107, thereby axially limiting the switching rotating column 107 in the rotating accommodating cavity 108. Multiple sets of distribution channel groups are formed on the switching rotating column 107. Each set of distribution channel groups includes multiple distribution channels 104 arranged radially at intervals along the switching rotating column 107 for material passage. A blocking block 12 is provided in cavity 101. The blocking block 12 can be connected to the bottom shell wall 106 or the side shell 102. The first port of the distribution channel 104 faces the material passage cavity 101, and the second port of the distribution channel 104 faces the bristle mounting cavity 105. When the switching rotating column 107 rotates in the rotating receiving cavity 108, it can put one group of distribution channels into the working position and put the other groups of distribution channels into the non-working position. The first port of the distribution channel 104 in the distribution channel group in the working position is connected to the material passage cavity 101, and the second port of the distribution channel 104 in the non-working position is connected to the material passage cavity 101. The first port of the distribution channel 104 in the distribution channel group is blocked by the block 12 and isolated from the material passage chamber 101. In this embodiment, different distribution channel groups can be switched to the working position as needed. For example, when the distribution channel 104 in the distribution channel group that is currently in the working position is blocked and cannot work, the switching rotating column 107 can be rotated to switch other distribution channel groups that are not in the working position to the working position to continue the work of coating output and guiding. There is no need to stop the operation immediately for cleaning, which improves the continuity and efficiency of the underwater special brushing device when performing brushing construction.

[0044] According to one embodiment of this application, the orifice diameters of the distribution channels 104 in different groups of distribution channels are different. By rotating the switching column 107, different distribution channel groups can be switched to adapt to coatings with different viscosities and rheological properties, or to different brushing speeds and coating thickness requirements. For example, when applying a thinner coating, a distribution channel group with a smaller orifice diameter can be used to control the flow rate; when applying a thicker coating, a distribution channel group with a larger orifice diameter can be switched to ensure sufficient material supply. This adjustability greatly improves the adaptability of the present invention to different types of coatings and different construction conditions. The rotation of the switching column 107 can be operated by electric drive (e.g., a rotating column drive motor driving a gear mechanism) or by manual rotation.

[0045] According to one embodiment of this application, an elastic retaining mechanism is provided in the rotating receiving cavity 108, and the distribution channel 104 is formed as an inclined channel. When the paint enters from the first port of the inclined channel (distribution channel 104) and flows out from the second port through the inclined channel, it can form a horizontal decomposition force that causes the corresponding switching rotating column 107 to rotate in a first direction (e.g., counterclockwise or clockwise). The direction of the horizontal decomposition force is parallel to the tangential direction of the switching rotating column 107, ensuring that the horizontal decomposition force formed by each inclined channel (distribution channel 104) on the same switching rotating column 107 when the paint passes through is in the same direction (i.e., the first direction, either both counterclockwise or both clockwise). When the horizontal decomposition force is less than a predetermined value, the elastic holding mechanism keeps the switching rotating column 107 fixed in a position where one group of distribution channels is in the working position and the other groups are in the non-working position. When the horizontal decomposition force is greater than or equal to the predetermined value, the switching rotating column 107 can overcome the elastic force of the elastic holding mechanism and rotate in the first direction under the action of the horizontal decomposition force until the next group of distribution channels is in the working position. At this point, the switching rotating column 107 is fixed by the elastic holding mechanism. Through this mechanism, the function of automatically switching the distribution channel group according to the increasing tendency of the obstruction of the inclined channel (distribution channel 104) is realized, effectively avoiding the problem of failure of the entire coating equipment due to obstruction of the inclined channel. In short, it is because the resistance of the paint accumulated or stuck on the inner wall of the inclined channel to the paint flowing through it increases, that the horizontal decomposition force driving the switching rotating column 107 to rotate increases, thereby automatically triggering the switching rotating column 107 to rotate and switch to the next clean distribution channel group in the working position, effectively avoiding complete obstruction of the inclined channel. The entire process requires no manual operation, external energy, or electrical control signals; it is completed automatically entirely based on fluid dynamics principles. This "self-driven, self-adjusting, and anti-clogging" design has significant engineering practical value. In underwater environments, operating conditions are complex, and divers' hands are occupied, making complex adjustment operations difficult. This invention achieves automatic switching to adapt to clogging, allowing divers to continue painting while the switching of the distribution channels 104 is completed automatically, greatly simplifying operation and improving construction efficiency and equipment reliability. Simultaneously, this design avoids a series of technical challenges related to sealing, waterproofing, and power supply associated with using solenoid valves or electric actuators in underwater environments, improving the reliability and safety of the underwater painting actuator during underwater operation.

[0046] According to a specific embodiment of this application, an elastic element receiving hole 111 is formed on the cavity wall of the rotating receiving cavity 108 corresponding to the bottom shell wall 106. The elastic holding mechanism includes a spring 13 and a locking head 14 (preferably a spherical structure) disposed in the elastic element receiving hole 111. The side wall of the switching rotating column 107 has a locking groove 112 for the locking head 14 to be inserted and engaged. When the switching rotating column 107 is held and fixed by the elastic holding mechanism, the spring 13 causes the locking head 14 to extend out of the elastic element receiving hole 111 and be engaged in the locking groove 112. When the horizontal decomposition force is greater than or equal to a predetermined value, the switching rotating column 107 presses the locking head 14 into the elastic element receiving hole 111, and the engagement between the locking head 14 and the locking groove 112 is released. Therefore, the switching rotating column 107 can rotate until the next engagement between the locking head 14 and the locking groove 112.

[0047] According to one embodiment of this application, multiple rotating receiving cavities 108 are spaced apart along the length of the bottom shell 103. A first set of distribution channel groups and a second set of distribution channel groups are formed on the switching rotating column 107. The first set of distribution channel groups includes two distribution channels 104 spaced apart along a first radial direction of the switching rotating column 107, and the second set of distribution channel groups includes two distribution channels 104 spaced apart along a second radial direction of the switching rotating column 107. The first radial direction is perpendicular to the second radial direction. The aperture size of each distribution channel 104 in the same set of distribution channel groups is the same. The aperture size of each distribution channel 104 in the first set of distribution channel groups is the same as that in the second set of distribution channel groups. In this way, when switching from the first set of distribution channel groups in the working position to the second set of distribution channel groups, the coating is guided by the distribution channels 104 of the same size, and the flow is not affected by the change in position of the switching rotating column 107. The output of the coating can be varied. Of course, the diameter of each distribution channel 104 can be flexibly designed according to actual needs. These diameters are not necessarily the same. Four elastic element receiving holes 111 are formed on the cavity wall of the rotating receiving cavity 108 at 90° intervals. A spring 13 and a locking head 14 are installed in each elastic element receiving hole 111. The side wall of the switching rotating column 107 has four corresponding locking slots 112 arranged at 90° intervals. This ensures that when the first group of distribution channels is in the working position and the locking head 14 is released from the locking engagement with the locking slot 112, the switching rotating column 107 rotates 90° to achieve the next locking engagement of the locking head 14 with the locking slot 112. At this time, the second group of distribution channels is in the working position. Of course, the number and position of the elastic element receiving holes 111 and the locking slots 112 on the switching rotating column 107 can be flexibly designed according to the actual number and position of the distribution channel groups.

[0048] It should be noted that the above embodiments only illustrate preferred embodiments of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting this application. It should be pointed out that those skilled in the art can make several modifications and improvements without departing from the concept of this application, such as combining different features in various embodiments, and these should all fall within the protection scope of this application.

Claims

1. An underwater-specific coating device, characterized in that, The underwater-specific coating device includes: A waterborne material storage and conveying mechanism includes a material storage tank and a discharge drive mechanism installed in the material storage tank, wherein the material storage tank has a discharge port; An underwater coating actuator includes a paint dispensing structure and brush bristles connected to the paint dispensing structure. The paint dispensing structure includes a fixed housing and a material passage chamber formed within the fixed housing. The inlet of the material passage chamber is connected to the outlet of a storage tank via a conveying pipe, and the outlet of the material passage chamber leads to the brush bristles. A discharge driving mechanism can drive the paint in the storage tank to flow out from the outlet and sequentially pass through the conveying pipe, the inlet of the material passage chamber, and the outlet of the material passage chamber to flow onto the brush bristles.

2. The underwater-specific coating device according to claim 1, characterized in that, The fixed housing includes a side housing and a bottom housing connected to the inner side of the lower end of the side housing. A top cover is detachably mounted on the upper end of the side housing. The inlet of the material passage cavity is formed on the top cover. The first surface of the bottom housing faces the top cover, and the second surface of the bottom housing faces the outside of the fixed housing. The bottom housing is provided with a plurality of distribution channels extending from the first surface to the second surface. The first surface of the bottom housing, the top cover, and the side housing enclose the material passage cavity. The second surface of the bottom housing and the side housing enclose an open bristle mounting cavity. One end of the bristle is connected to the second surface of the bottom housing, and the other end of the bristle extends out of the open cavity.

3. The underwater-specific coating device according to claim 1, characterized in that, The fixed housing comprises two half-shells that are detachably connected to each other.

4. The underwater-specific coating device according to claim 2, characterized in that, The plurality of distribution channels are arranged at equal intervals along the length of the fixed housing, and the diameter of each distribution channel is the same.

5. The underwater-specific coating device according to claim 4, characterized in that, The top cover is connected to a handle tube, one end of which is connected to the inlet of the material passage chamber, and the other end of which is connected to the conveying pipe. The handle tube is a rigid tube, and the conveying pipe is a flexible tube.

6. The underwater special coating device according to any one of claims 1 to 5, characterized in that, The discharge drive mechanism includes a piston that is slidably disposed in the storage bin and a power device that drives the piston. The power device is a motor, a pneumatic mechanism, or a hydraulic mechanism. The power device can drive the piston to reciprocate within the storage bin.

7. The underwater-specific coating device according to claim 2, characterized in that, The bottom housing includes a bottom housing wall and a switching rotating column. A rotating receiving cavity is formed on the bottom housing wall, extending from the first surface to the second surface. The switching rotating column is rotatably installed in the rotating receiving cavity and is axially limited within the rotating receiving cavity. Multiple sets of distribution channels are formed on the switching rotating column. Each set of distribution channels includes multiple distribution channels arranged radially at intervals along the switching rotating column. A blocking block is provided in the material passage cavity. The first port of the distribution channel faces the material passage cavity, and the second port of the distribution channel faces the bristle mounting cavity. When the switching rotating column rotates in the rotating receiving cavity, it can put one set of distribution channels in a working position and put the other sets of distribution channels in a non-working position. The first port of the distribution channel in the working position is connected to the material passage cavity, and the first port of the distribution channel in the non-working position is blocked by the blocking block and isolated from the material passage cavity.

8. The underwater-specific coating device according to claim 7, characterized in that, The rotating cavity is provided with an elastic retaining mechanism. The distribution channel is formed as an inclined channel. When the paint enters from the first port and flows out from the second port through the inclined channel, it can generate a horizontal decomposition force that causes the corresponding switching rotating column to rotate in the first direction. When the horizontal decomposition force is less than a predetermined value, the elastic retaining mechanism holds the switching rotating column in a position where one group of distribution channels is in the working position and the other groups of distribution channels are in the non-working position. When the horizontal decomposition force is greater than or equal to the predetermined value, the switching rotating column can overcome the elastic force of the elastic retaining mechanism and rotate in the first direction under the action of the horizontal decomposition force until the next group of distribution channels is in the working position, at which point the switching rotating column is held in place by the elastic retaining mechanism.

9. The underwater-specific coating device according to claim 8, characterized in that, An elastic element receiving hole is formed on the cavity wall of the rotating receiving cavity corresponding to the bottom shell wall. The elastic retaining mechanism includes a spring and a locking head disposed in the elastic element receiving hole. The side wall of the switching rotating column has a locking groove for the locking head to be inserted and engaged. When the switching rotating column is held and fixed by the elastic retaining mechanism, the spring causes the locking head to extend out of the elastic element receiving hole and engage in the locking groove.

10. The underwater-specific coating device according to claim 8, characterized in that, The rotating receiving cavities are arranged at intervals along the length of the bottom shell. A first set of distribution channels and a second set of distribution channels are formed on the switching rotating column. The first set of distribution channels includes two distribution channels arranged at intervals along a first radial direction of the switching rotating column. The second set of distribution channels includes two distribution channels arranged at intervals along a second radial direction of the switching rotating column. The first radial direction is perpendicular to the second radial direction. The diameter of each distribution channel in the same set of distribution channels is the same. The diameter of each distribution channel in the first set of distribution channels is the same as the diameter of each distribution channel in the second set of distribution channels.

Images