Coating spraying backflow device and method based on elastic reset locking prevention

Abstract

The invention belongs to the technical field of coating spraying, and discloses a coating spraying backflow device and method based on elastic reset locking prevention, and the coating spraying backflow device based on elastic reset locking prevention comprises a backflow assembly, a spraying assembly, a springback limiting module and two mechanical elastic reset mechanisms. The springback limiting module comprises a driving part and two backflow clamping arms, the two backflow clamping arms are in transmission connection with the driving part, the second spraying assembly is arranged on the tops of the two backflow clamping arms, the two backflow clamping arms are connected with the backflow assembly, and each mechanical elastic reset mechanism comprises a first elastic element and a supporting part. One end of the first elastic element is fixed, the other end of the first elastic element abuts against or is connected with the supporting piece, and the supporting piece is connected with the backflow clamping arm. The high-altitude unmanned spraying system has the advantages of high recovery efficiency, excellent spraying quality and reliable locking prevention capability, and a safe and efficient solution is provided for high-altitude unmanned spraying operation.

Description

Technical Field

[0001] This invention relates to the field of paint spraying technology, and specifically to a paint spraying recirculation device and method based on elastic reset anti-locking. Background Technology

[0002] In automated coating operations for cables (such as power transmission cables, bridge cables, etc.), the spraying device is a key component for achieving efficient and uniform coating.

[0003] Existing spraying equipment typically uses a fixed nozzle structure, which can complete basic spraying tasks, but has obvious defects in actual high-altitude and complex working conditions: on the one hand, a large amount of unattached paint is easily scattered and wasted, causing environmental pollution and material loss; on the other hand, in order to improve paint utilization, some systems have introduced paint recovery hood structures, but such hoods mostly adopt rigid closure or motor-driven clamping methods. In the event of an unexpected power outage of the robot, failure of the control system, or encounter with irregular structures such as cable joints, mechanical locking is very likely to occur, causing the device to get stuck on the cable, which not only interrupts the operation, but may also cause serious safety accidents such as equipment falling.

[0004] Although some advanced solutions (such as application CN202510628367) have introduced linked recycling mechanisms to recover excess paint and achieved self-locking through gravity triggering, their closing mechanism is inherently rigid and unidirectional. Once the robot stops due to power failure, malfunction, or encountering irregular cables, the mechanism will permanently lock the equipment to the cables, requiring external drone intervention to free it, posing a serious risk of falling from height. Furthermore, its symmetrical recycling box design does not consider the characteristic that paint mainly drips from the bottom of the cables due to gravity, resulting in limited recycling efficiency.

[0005] Therefore, there is an urgent need for a new technology that can solve the problems of limited recycling efficiency and one-way closed mechanism. Summary of the Invention

[0006] The purpose of this invention is to provide a paint spraying recirculation device and method based on elastic reset anti-locking, so as to overcome the problems existing in the prior art. This invention can combine high recycling efficiency, excellent spraying quality and reliable anti-locking capability, providing a safe and efficient solution for unmanned high-altitude spraying operations.

[0007] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a paint spraying recirculation device based on elastic reset anti-locking, comprising: The recirculation assembly includes a recirculation hood and two recirculation side hoods, the inner surfaces of which form a structure suitable for guiding unattached paint to converge toward a predetermined area; The spraying assembly includes a first spraying assembly for spraying the bottom of the work object and a second spraying assembly for spraying the top of the work object, which are respectively connected to the feeding system. The first and second spraying assemblies are located inside the return assembly, the return hood is located outside the second spraying assembly, and two return side hoods are located on the bottom sides of the return hood. The springback limiting module includes a drive component and two return flow clamping arms. The two return flow clamping arms are connected to the drive component for transmission. The second spraying component is disposed on the top of the two return flow clamping arms. The two return flow clamping arms are respectively connected to the corresponding return flow side cover for driving the return flow side cover to open and close. Two mechanical elastic reset mechanisms are provided. Each mechanical elastic reset mechanism includes a first elastic element and a support member. One end of the first elastic element is fixed, and the other end abuts or is connected to the support member. The support member is connected to the return clamping arm.

[0008] According to one embodiment of the present invention, the first spraying assembly is disposed through the return side cover, and the nozzle of the first spraying assembly is located outside the return side cover.

[0009] According to one embodiment of the present invention, the bottom of the drive component is provided with a mounting base, which is connected to the return shroud.

[0010] According to one embodiment of the present invention, the bottom of the return side cover is provided with a return port for connecting a return pipeline.

[0011] According to one embodiment of the present invention, the two return side shields are arranged in an asymmetrical manner in terms of size or shape.

[0012] According to one embodiment of the present invention, the structure suitable for guiding the unattached coating to converge into a predetermined area is a streamlined curved surface.

[0013] According to one embodiment of the present invention, the two reflux clamping arms are respectively connected to the corresponding reflux side cover for driving the reflux side cover to open and close.

[0014] According to one embodiment of the present invention, each of the mechanical elastic reset mechanisms further includes a return flow rotating arm and a second elastic element. The return flow rotating arm is connected to the return flow side cover, and the second elastic element is located on top of the support member. One end of the second elastic element is housed inside the return flow rotating arm.

[0015] According to one embodiment of the present invention, the first elastic element and the second elastic element are torsion springs, disc springs, rubber elastomers or shape memory alloy components. The present invention also provides a method for the application of torsion springs, disc springs, rubber elastomers or shape memory alloy components.

[0016] According to one embodiment of the present invention, the discharge orifice diameter of the first spraying component is larger than that of the second spraying component.

[0017] The present invention also provides a paint spraying reflow method based on elastic reset anti-locking, which, based on the above-mentioned paint spraying reflow device based on elastic reset anti-locking, includes the following steps: The driving component moves, causing the two return flow clamping arms to open, which in turn causes the two return flow side covers to be in the open state. The paint spraying return device, which is in the open position, is wrapped around the work object; The control drive unit performs a reverse action, driving the two reflow clamping arms to close, causing the reflow assembly to tightly surround the work object; The material supply system is started, and the first and second spraying components respectively apply coatings with different spraying characteristics to the bottom and top of the work object; Unattached paint that splashes or drips from the workpiece is collected and recycled along the streamlined curved surface of the return assembly; In the event of a power outage or mechanical resistance, the mechanical elastic reset mechanism operates, enabling the return assembly to open when subjected to external force and automatically reset through the elastic restoring force of the first elastic element after the external force disappears, thus providing an anti-locking capability.

[0018] The above technical solution has the following advantages or beneficial effects: Firstly, this invention provides a paint spraying recirculation device based on elastic reset anti-locking. By setting up a high-efficiency recirculation component and a differentiated spraying component for guiding paint collection, it achieves precise and uniform spraying of the upper and lower surfaces of the work object, significantly improving coating quality and material utilization. The core lies in the innovative mechanical elastic reset mechanism, which, together with the drive mechanism, forms a dual redundancy mechanism of active control and passive safety. When the device encounters power failure or mechanical resistance, the elastic element can provide a restoring force, allowing the recirculation side cover to automatically reset after being opened by force. This completely solves the risks of equipment jamming and falling from height caused by rigid unidirectional locking in the prior art, ensuring inherent safety under complex working conditions. This device constructs a three-in-one collaborative system of "high-efficiency recycling - precision spraying - inherent safety," which, while ensuring maximum coating quality and material utilization, also eliminates the hidden dangers of equipment jamming or falling during high-altitude operations. It provides an overall solution for unmanned spraying operations under complex working conditions that combines high recycling efficiency, excellent spraying quality, and reliable anti-locking capability.

[0019] In some embodiments, by embodying the recirculation assembly as a combination of a recirculation hood and two side recirculation hoods, a more optimized paint collection and guiding path is achieved. The recirculation hood is located above the top nozzle, effectively receiving and guiding paint splashed from the upper surface. The two side recirculation hoods precisely receive paint dripping from the bottom and sides of the cable. The inner surfaces of the two side recirculation hoods form a guiding structure, enabling the paint to efficiently collect along a specific path, significantly reducing disordered splashing and residue of paint in the cavity. This structure makes paint recycling more directional and controllable. Together with the first spraying assembly, it ensures the spatial synergy between the lower surface spraying coverage and paint recycling, further improving the overall recycling efficiency and providing a stable paint circulation guarantee for continuous operation.

[0020] In some embodiments, the asymmetrically designed return side cover more accurately adapts to the physical characteristics of the coating dripping mainly at the bottom of the cable due to gravity, and the wide side, as the main recycling channel, significantly improves the collection efficiency; the drive unit is firmly connected to the return cover through a dedicated mounting base, ensuring the stability of the actuator and the accuracy of the transmission, making the opening and closing action reliable, and providing a solid structural foundation for the anti-locking function.

[0021] In some embodiments, by setting a return interface at the bottom of the return side cover, a clear and controllable outlet path is provided for the collected paint. This interface is directly connected to the return pipeline, which can efficiently guide the recycled paint back to the feeding system, realizing closed-loop management of paint from capture, collection to return, avoiding paint accumulation in the device, and effectively improving the continuity of paint recycling and the economy of the overall operation.

[0022] In some embodiments, by designing the inner surfaces of the return hood and the return side hood as streamlined curved surfaces, the resistance and adhesion of the paint flow are significantly reduced. This smooth curved surface structure effectively avoids paint from sticking to the walls, remaining, and drying out in the cavity, ensuring that splashed and dripping paint can smoothly and quickly slide down the predetermined path to the collection area, thereby improving the recycling efficiency and the long-term working stability of the system.

[0023] In some embodiments, by directly connecting the return clamping arm to the corresponding return side cover, a stable and reliable opening and closing transmission structure is constructed, ensuring that the power of the drive component can be efficiently and synchronously transmitted to both sides of the cover, making the opening and closing action precise and controllable. When closed, it tightly wraps around the cable to optimize the spraying and recycling environment, and when abnormal, it can open smoothly under the action of external force, providing direct mechanical protection for the realization of the anti-locking function.

[0024] In some embodiments, a dual elastic buffer and reset mechanism is constructed by introducing a combination of a return flow arm and a second elastic element. The return flow arm, as a connecting and force transmission component, effectively transmits motion and external force. The second elastic element works in conjunction with the first elastic element to enhance the stability and redundancy of the reset torque, further improving the device's deformation tolerance and automatic reset reliability under abnormal force, and ensuring the robustness of the anti-locking function.

[0025] In some embodiments, by embodying the first and second elastic elements as a variety of elastic component options, the versatility and environmental adaptability of the device are significantly improved. Different materials and structural characteristics, such as torsion springs, disc springs, rubber bodies, and shape memory alloys, can be optimally configured for specific working conditions such as operating temperature, load conditions, and reset accuracy, ensuring that the anti-lock reset function can be stably and reliably implemented in various complex environments.

[0026] In some embodiments, by setting different nozzle orifice diameters, the spraying strategy is refined. The first spraying component with a large orifice diameter provides sufficient and strong coating to the bottom of the workpiece to prevent missed coating; the second nozzle with a small orifice diameter provides fine atomization to the top to avoid dripping. This differentiated design works together to ensure that the coating is uniform and firmly adhered around the cable, significantly improving coating quality and material utilization efficiency.

[0027] Secondly, this invention provides a paint spraying recirculation method based on elastic reset anti-locking. This method systematically integrates efficient recirculation, differentiated spraying, and passive anti-locking mechanisms, achieving a comprehensive improvement in safety, economy, and quality for automated high-altitude spraying operations. In the operation process, the asymmetric recirculation structure and streamlined curved surface ensure efficient paint recovery, significantly saving costs and reducing pollution. The coordinated operation of nozzles with different apertures ensures the uniformity and density of the coating in all directions. Crucially, this method incorporates an intrinsically safe design based on mechanical elastic elements. Under extreme conditions such as power failure or obstruction, the device can automatically disengage from the locked state, fundamentally eliminating the risk of equipment jamming and falling from heights, providing reliable technical support for unmanned operation and maintenance. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a paint spraying reflow device based on elastic reset anti-locking, according to some embodiments of this specification. Figure 2 The diagram shows the structure of the spring-loaded limiting module and the mechanical elastic reset mechanism according to some embodiments of this specification. Figure 3 This is a schematic diagram of a mechanical elastic reset mechanism according to some embodiments of this specification; Figure 4This is a schematic diagram showing the open state of the return side cover according to some embodiments of this specification; In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 101. Return hood; 102. Return side hood; 103. First spraying assembly; 104. Return interface; 105. Second spraying assembly; 2. Springback limiting module; 201. Return rotating arm; 202. Support component; 203. First elastic element; 301. Drive component; 302. Return clamping arm; 303. Mounting base. Detailed Implementation

[0029] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of the invention. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0030] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention 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, they should not be construed as limitations on this invention.

[0031] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0033] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0034] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0035] This invention provides a novel spraying device that can efficiently recycle paint and has intrinsically safe anti-lock-in capability.

[0036] Example: This embodiment provides a paint spraying recirculation device based on elastic reset anti-locking, see [link / reference]. Figure 1 It includes: a reflow assembly, a spraying assembly, a springback limiting module 2, and a mechanical elastic reset mechanism; The recirculation assembly includes a recirculation hood 101 and two recirculation side hoods 102. The inner surfaces of the two recirculation side hoods 102 are configured to guide unattached paint to converge towards a predetermined area. The spraying assembly includes a first spraying assembly 103 for spraying the bottom area of ​​the workpiece, connected to the feeding system and an internal isolation pump, and a second spraying assembly 105 for spraying the top area of ​​the workpiece. The first spraying assembly 103 and the second spraying assembly 105 are located inside the recirculation assembly, and the recirculation hood 101 is located outside the second spraying assembly 105. Side covers 102 are located on both sides of the bottom of the return cover 101; the springback limiting module 2 includes a drive component 301 and two return clamping arms 302, which are connected to the drive component 301. The second spraying assembly 105 is disposed on the top of the two return clamping arms 302. The two return clamping arms 302 are respectively connected to the corresponding return side covers 102 for driving the return side covers 102 to open and close; two mechanical elastic reset mechanisms are disposed between the return assembly and the springback limiting module 2, and are connected to the return assembly and the springback limiting module 2. See [reference needed] Figure 2Each of the mechanical elastic reset mechanisms includes a first elastic element 203 and a support member 202. One end of the first elastic element 203 is fixed, and the other end abuts or is connected to the support member 202. The support member 202 is connected to the return clamping arm 302.

[0037] In some embodiments, the first spraying assembly 103 is disposed through the return side cover 102, and the nozzle of the first spraying assembly 103 is located outside the return side cover 102.

[0038] In some embodiments, the structure adapted to guide the unattached coating to converge toward a predetermined area is a streamlined curved surface.

[0039] In some embodiments, the surfaces in contact with the coating in the return shroud 101, the return side shroud 102, and the rebound limiting module 2 are streamlined curved surfaces.

[0040] In some embodiments, the two return side shields 102 are asymmetrically wide or narrow in size or shape.

[0041] In some embodiments, the object of the operation is a power transmission cable, bridge cable, or pipeline.

[0042] In some embodiments, the bottom of the drive unit 301 is provided with a mounting base 303, which is connected to the return shroud 101, and the drive unit 301 controls the opening and closing of the two return clamping arms 302.

[0043] In some embodiments, the drive unit 301 is a servo motor.

[0044] In some embodiments, the bottom of the return side cover 102 is provided with a return port 104 for connecting a return pipeline.

[0045] In some embodiments, during operation, excess paint that is not attached to the cable will splash onto the surfaces of the return cover 101, the return side cover 102, and the rebound limiting module 2. Thanks to the streamlined curved surface design of each component, the paint can naturally slide to the bottom of the return side cover 102. The bottom of the return side cover 102 is provided with a return interface 104, which guides the collected paint back to the water tank through a water pipe, thereby realizing the recycling of paint.

[0046] In some embodiments, the return port 104 is a pneumatic connector.

[0047] In some embodiments, in addition to gravity reflux, a micro peristaltic pump can be added to the reflux pipeline to improve the recycling efficiency of high-viscosity coatings.

[0048] In some embodiments, the size of the reflux side cover 102 is larger than the size of the reflux cover 101, the flow guiding volume of the reflux side cover 102 is larger than the flow guiding volume of the reflux cover 101, and the reflux side cover 102 is located below the predetermined area during operation.

[0049] In some embodiments, the two reflux clamping arms 302 are respectively connected to the corresponding reflux side cover 102 for driving the reflux side cover 102 to open and close.

[0050] In some embodiments, see Figure 3 Each of the mechanical elastic reset mechanisms further includes a return rotating arm 201 and a second elastic element. The return rotating arm 201 is connected to the return side cover 102, and the second elastic element is located on the top of the support member 202 and abuts against the support member 202 to form an elastic reset mechanism. One end of the second elastic element is housed inside the return rotating arm 201.

[0051] In some embodiments, the reflux swivel arm 201 is streamlined and is integral with or closely fitted to the reflux side cover 102.

[0052] In some embodiments, the support member 202 is an aluminum column.

[0053] In some embodiments, during normal operation, the drive unit 301 drives the return clamp arm 302 to close, causing the return side cover 102 to wrap around the cable. When encountering a cable joint, foreign object, or sudden power failure, external force pushes the return side cover 102 to open outward, and the first elastic element 203 and the second elastic element are deformed under pressure. After the external force disappears, the first elastic element 203 and the second elastic element automatically rebound, causing the return side cover 102 to return to its initial closed state. This ensures that the device will not be permanently locked under any abnormal conditions, guaranteeing smooth cable disconnection and greatly improving operational safety.

[0054] In some embodiments, the mechanical elastic reset mechanism is a passive reset mechanism. When the drive element 301 is de-energized or the return side cover 102 is opened by external resistance, the elastic element 203 can drive the return side cover 102 to automatically reset to the closed position or the initial position to be closed.

[0055] In some embodiments, the first elastic element 203 and the second elastic element are one of torsion springs, disc springs, rubber elastomers or shape memory alloy components, to adapt to different temperature and load environments.

[0056] In some embodiments, the reflux clamping arm 302 is provided with a sensor for monitoring its opening and closing state or clamping force, which monitors the closing state in real time and feeds it back to the main control system.

[0057] In some embodiments, the first spraying assembly 103 includes at least one first nozzle, and the second spraying assembly 105 includes at least one second nozzle, wherein the discharge orifice diameter of the first nozzle is larger than that of the second nozzle.

[0058] In some embodiments, the first spraying assembly 103 is disposed through the return side cover 102, and the first nozzle is located outside the return side cover 102.

[0059] In some embodiments, the number of nozzles can be increased or decreased according to the characteristics of the coating, or an adjustable orifice nozzle can be used to achieve dynamic atomization adjustment.

[0060] In some embodiments, the first spraying assembly 103 and the second spraying assembly 105 have different spraying characteristics.

[0061] In some embodiments, the first and second nozzles are high-speed nozzles.

[0062] In some embodiments, the first spraying assembly 103 and the second spraying assembly 105 are connected to an internal isolation pump via corrosion-resistant water pipes, and are supplied with materials synchronously during operation.

[0063] In some embodiments, the paint spraying return device has an overall ring-shaped structure and is connected to the main body of the spraying robot through the top interface. Before operation, the drive component 301 drives the return clamp arm 302 to open, and the drone or robotic arm puts the device into the target cable; then the drive component 301 drives the return clamp arm 302 to close, so that the return side cover 102 tightly surrounds the cable. After the spraying is started, the isolation pump delivers the anti-icing paint to the first spraying component 103 and the second spraying component 105 through corrosion-resistant water pipes respectively: the second spraying component 105 produces fine atomized paint, which adheres to the upper half of the cable; the first spraying components 103 on both sides spray out coarser droplets, which effectively wet the lower half of the surface. The unattached paint slides down the streamlined inner wall to the bottom of the return side cover 102 and returns to the water tank through the return pipe connected to the return interface 104. When the painting robot experiences an emergency such as a power outage during operation, causing the painting mechanism to close and lock, the return side cover 102 can be opened by external force to prevent the painting robot from locking onto the cable and causing safety hazards.

[0064] This invention employs an asymmetric return side cover 102 structure with a wide and narrow design to precisely guide the coating dripping from the bottom of the cable into the wide side return channel, significantly improving recovery efficiency. It utilizes a coordinated spraying layout with nozzles of varying diameters; the small-diameter nozzle at the top achieves fine atomization and adhesion to the upper surface, while the large-diameter nozzle on the side ensures full coverage of the lower surface, balancing uniformity and adhesion. A fully streamlined internal cavity design ensures smooth surfaces without dead angles for the return cover 101, return side cover 102, and rotating arm 201, guaranteeing smooth return of any unattached coating and preventing accumulation and blockage. A passive anti-locking mechanism based on torsion springs eliminates the need for external power, relying on mechanical elasticity to achieve "force-opening-automatic reset," completely eliminating the risk of jamming due to power outages or malfunctions. A modular rebound limit module integration combines servo motor drive and torsion spring reset, supporting both active control and passive safety redundancy.

[0065] Compared with existing technologies, this invention significantly improves the safety, environmental friendliness, and adaptability of spraying operations: First, in terms of paint utilization, the asymmetric return hood and streamlined internal cavity design effectively capture and recover more than 90% of splashed paint, greatly reducing material waste and environmental pollution; Second, in terms of coating quality, the different sizes of nozzles work together, resulting in fine atomization on the upper surface that is not prone to dripping, and full coverage on the lower surface without any missed areas, resulting in a uniform and dense overall coating, which is significantly better than single-nozzle solutions; Most importantly, in terms of inherent safety, by introducing a purely mechanical torsion spring rebound anti-locking mechanism, even in extreme cases where the robot is completely powered off and the control system is paralyzed, the device can still automatically open under external force and reset through the torsion spring, ensuring that the equipment is not stuck on the cable, fundamentally eliminating the risk of falling from heights and providing reliable safety assurance for unmanned operation and maintenance.

[0066] This device is not only suitable for anti-icing coatings, but also for the spraying and recycling of functional coatings such as anti-corrosion, fireproof, and conductive coatings. It can also be adapted to other linear structures such as pipelines and steel cables.

[0067] This embodiment also provides a paint spraying reflow method based on elastic reset anti-locking, see [link to relevant documentation]. Figure 1 and Figure 4 This includes the following steps: Step 1: The driving component 301 is activated, driving the two return flow clamping arms 302 to open, thereby causing the two return flow side covers 102 to be in the open state. Step 2: Place the paint spraying return device, which is in the open position, around the work object; Step 3: Control the drive component 301 to perform a reverse action, drive the two return clamping arms 302 to close, and drive the two return side covers 102 to tightly surround the work object. Step 4: Start the material supply system to supply paint synchronously to the first spraying component 103 and the second spraying component 105. The first spraying component 103 and the second spraying component 105 respectively perform coating operations with different spraying characteristics on the bottom and top of the work object. Step 5: Unadhered paint splashed or dripped from the work object is collected and recycled along the streamlined curved surface of the return assembly. During the coating operation, unattached paint that splashes or drips from the work object collects along the streamlined curved surfaces of the return hood 101 and the return side hood 102, and is then guided back for recycling through the return port 104 and the return pipeline. In particular, at any time after step 3 or step 4, if a power outage or mechanical resistance is encountered, the mechanical elastic reset mechanism will work, so that the return side cover 102 has the anti-locking capability to open when subjected to external force and automatically reset through the elastic restoring force of the elastic element 203 after the external force disappears.

[0068] In some embodiments, the object of the operation is a power transmission cable, bridge cable, or pipeline.

[0069] The structure and working principle of the present invention will be further explained below: The paint spraying recirculation device based on elastic reset anti-locking shown in some embodiments of this specification is used in the following ways: First, the drive unit 301 is energized and drives the two recirculation clamping arms 302 to open synchronously, which in turn drives the two recirculation side covers 102 connected to them to open, so that the device as a whole is in an open ring shape. During operation, the device is laterally inserted into the work object such as cables by a drone or a robotic arm. Then, the drive unit 301 moves in the opposite direction to drive the recirculation clamping arms 302 to close, so that the two recirculation side covers 102 tightly wrap around the cables to form a closed spraying chamber.

[0070] After the spraying operation is started, the material supply system supplies paint to the first spraying component 103 and the second spraying component 105 simultaneously through pipelines. The second spraying component 105, located at the top of the device and with a smaller aperture, sprays finely atomized paint onto the surface of the cable above to achieve fine adhesion. The first spraying component 103, located inside the return side cover 102 on both sides and with a larger aperture, sprays paint with stronger coverage onto the area below the cable to ensure sufficient wetting.

[0071] During the spraying process, unattached paint flies towards the inner wall of the chamber due to gravity and splashing. Thanks to the fact that all surfaces in contact with the paint in the return hood 101, return side hood 102 and rebound limiting module 2 are smooth streamlined curved surfaces, the paint can smoothly slide down the inner wall. The asymmetrically designed return side hood 102 further guides the paint and collects it in the recycling area on the wider side of its bottom. Finally, the paint returns to the feeding system through the return interface 104 at the bottom of the return side hood 102 and the connected return pipeline, realizing recycling.

[0072] Throughout the process, the core safety mechanism of this device—the mechanical elastic reset mechanism—continues to function. This mechanism includes a return arm 201 connected to the return side cover 102, and a first elastic element 203 and a second elastic element located inside the return arm and abutting against the support member 202 on the return clamping arm 302. Under normal operating conditions, the drive member 301 actively controls the opening and closing. When the device encounters a cable joint, foreign object collision, or sudden power failure, the external force forces the return side cover 102 to open outward. At this time, the first elastic element 203 and the second elastic element undergo elastic deformation to store energy. Once the external force disappears, the elastic element releases the stored elastic potential energy and automatically drives the return side cover 102 to reset to the closed or safe position, thereby completely preventing the device from getting stuck on the cable due to rigid locking and ensuring that it can safely detach under any abnormal situation, thus guaranteeing the inherent safety of high-altitude operations.

[0073] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the above embodiments should be considered exemplary rather than restrictive in all respects; the scope of protection of the present invention is defined by the appended claims, not by the foregoing description, and thus all changes falling within the meaning and scope of the equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0074] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity; those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art. The above content is merely illustrative of the technical concept of the present invention and should not be construed as limiting the scope of protection of the present invention. Any modifications made to the technical solutions based on the technical concept proposed in this invention fall within the scope of protection of the claims of this invention.

Claims

1. A paint spraying recirculation device based on elastic reset anti-locking, characterized in that, include: The recirculation assembly includes a recirculation hood (101) and two recirculation side hoods (102), the inner surfaces of the two recirculation side hoods (102) forming a structure suitable for guiding unattached paint to converge toward a predetermined area; The spraying assembly includes a first spraying assembly (103) for spraying the bottom of the work object and a second spraying assembly (105) for spraying the top of the work object, which are respectively connected to the feeding system. The first spraying assembly (103) and the second spraying assembly (105) are located inside the return assembly, the return hood (101) is located outside the second spraying assembly (105), and two return side hoods (102) are located on the bottom sides of the return hood (101). The springback limiting module (2) includes a drive component (301) and two return clamping arms (302). The two return clamping arms (302) are connected to the drive component (301) in a transmission manner. The second spraying assembly (105) is disposed on the top of the two return clamping arms (302). The two return clamping arms (302) are respectively connected to the corresponding return side cover (102) for driving the return side cover (102) to open and close. Two mechanical elastic reset mechanisms, each of which includes a first elastic element (203) and a support member (202). One end of the first elastic element (203) is fixed, and the other end abuts or connects to the support member (202). The support member (202) is connected to the return clamping arm (302).

2. The paint spraying recirculation device based on elastic reset anti-locking as described in claim 1, characterized in that, The first spraying assembly (103) is disposed through the return side cover (102), and the nozzle of the first spraying assembly (103) is located outside the return side cover (102).

3. The paint spraying recirculation device based on elastic reset anti-locking as described in claim 1, characterized in that, The bottom of the drive unit (301) is provided with a mounting base (303), which is connected to the return shroud (101).

4. A paint spraying recirculation device based on elastic reset anti-locking as described in claim 1, characterized in that, The bottom of the return side cover (102) is provided with a return port (104) for connecting the return pipeline.

5. A paint spraying recirculation device based on elastic reset anti-locking as described in claim 1, characterized in that, The two return side shields (102) are arranged in an asymmetrical manner in terms of size or shape.

6. A paint spraying recirculation device based on elastic reset anti-locking as described in claim 1, characterized in that, The structure suitable for guiding unattached paint to converge into a predetermined area is a streamlined curved surface.

7. A paint spraying recirculation device based on elastic reset anti-locking as described in claim 1, characterized in that, Each of the mechanical elastic reset mechanisms further includes a return rotating arm (201) and a second elastic element. The return rotating arm (201) is connected to the return side cover (102), and the second elastic element is located on top of the support (202). One end of the second elastic element is housed inside the return rotating arm (201).

8. A paint spraying recirculation device based on elastic reset anti-locking as described in claim 7, characterized in that, The first elastic element (203) and the second elastic element are one of torsion spring, disc spring, rubber elastomer or shape memory alloy component.

9. A paint spraying recirculation device based on elastic reset anti-locking as described in claim 1, characterized in that, The discharge orifice diameter of the first spraying component (103) is larger than that of the second spraying component (105).

10. A method for preventing paint spraying reflow based on elastic reset anti-locking, characterized in that, A paint spraying recirculation device based on elastic reset anti-locking as described in any one of claims 1-9 includes the following steps: The driving component (301) is activated, driving the two return clamping arms (302) to open, thereby causing the two return side covers (102) to be in the open state; The paint spraying return device, which is in the open position, is wrapped around the work object; The control drive (301) performs a reverse action, driving the two return clamping arms (302) to close, causing the return assembly to tightly surround the work object; The material supply system is started, and the bottom and top of the work object are coated with different coating characteristics by the first spraying component (103) and the second spraying component (105) respectively; Unattached paint that splashes or drips from the workpiece is collected and recycled along the streamlined curved surface of the return assembly; In the event of a power outage or mechanical resistance, the mechanical elastic reset mechanism operates, enabling the return assembly to have the anti-locking capability to open when subjected to external force and automatically reset through the elastic restoring force of the first elastic element (203) after the external force disappears.

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