A paint spraying device for wire conveyor racks

Abstract

This invention provides a paint spraying device for wire conveyor racks, comprising: a conveying trolley, on which are mounted a spraying and mixing mechanism, a spraying and conveying mechanism, a handheld spraying mechanism, an air pump, a recovery tank, and a cleaning tank. The handheld spraying mechanism includes a handheld frame and a detachable spray head disposed at the end of the handheld frame. The spray head contains a spray nozzle for spraying paint and at least two spray outlets surrounding the spray nozzle for spraying auxiliary atomizing airflow. Each spray outlet is connected to the air pump. The recovery tank is used to collect residual paint after spraying. The cleaning tank is selectively connected to the spraying and mixing mechanism via a valve. This invention addresses key pain points: by using airflow-coordinated atomization and a precisely adjustable structure, it completely solves the problems of poor atomization, paint waste, nozzle clogging, and low coating adhesion in existing handheld spraying devices, better adapting to the anti-corrosion spraying requirements of wire conveyor racks.

Description

Technical Field

[0001] This invention relates to the field of wire conveyor processing technology, and in particular to a paint spraying device for wire conveyors. Background Technology

[0002] Power transmission line racks are core supporting components of power transmission systems, widely distributed in complex environments such as plains, mountains, coastlines, and industrial areas. They are constantly exposed to the natural environment, enduring multiple effects including atmospheric oxidation, rain erosion, ultraviolet radiation, salt spray corrosion, and industrial acid and alkali gas corrosion. Related data shows that steel power transmission line racks without effective anti-corrosion treatment can corrode at rates 3-5 times faster in coastal salt spray environments than in dry inland environments. This easily leads to reduced structural strength and connection failure, shortening the service life of the racks, increasing maintenance costs, and potentially causing power line short circuits and falls due to rack breakage or tilting, posing a serious threat to the stable operation of the power system.

[0003] Existing spraying equipment falls into two categories: fixed tabletop sprayers, while integrating mixing and spraying, suffer from poor portability, making them unsuitable for the mobile operations required for outdoor power cable conveyor systems. They also lack residue recovery and equipment cleaning functions, leading to paint waste and equipment clogging due to drying. Handheld spray guns, requiring manual carrying of paint buckets or connection to fixed delivery pipes, suffer from poor atomization of high-viscosity paints, significant paint mist diffusion and waste, large blind spots in complex areas (bolt gaps, brace angles), nozzle clogging due to paint drying, and low coating adhesion. While some integrated spraying devices incorporate mixing functions, they fail to address the pressure matching issue between mixing and delivery, lack a surrounding airflow-assisted atomization structure, and lack a corresponding residue recovery and cleaning system. This results in high maintenance difficulty, low paint utilization, and an inability to meet the high-efficiency anti-corrosion spraying requirements of power cable conveyor systems. Therefore, optimizing the spraying structure and functional integration solutions is urgently needed to address these pain points. Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a paint spraying device for wire conveyor racks. This device solves the problems of poor portability, poor atomization effect, serious paint waste, easy clogging, and high maintenance difficulty of existing equipment. It realizes integrated operation of "mixing-pressurized conveying-coordinated atomization spraying-residue recycling-equipment cleaning", improves outdoor spraying efficiency and coating quality, and reduces maintenance costs.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a paint spraying device for an electrical wire conveying frame, comprising: a conveying trolley, characterized in that the conveying trolley is equipped with a spraying and stirring mechanism, a spraying and conveying mechanism, a handheld spraying mechanism, an air pump, a recovery tank, and a cleaning tank; the input end of the spraying and conveying mechanism is connected to the spraying and stirring mechanism, and the output end is connected to the handheld spraying mechanism; the handheld spraying mechanism includes a handheld frame and a detachable spray head disposed at the end of the handheld frame; the spray head is provided with a spray nozzle for spraying paint, and at least two spray outlets for spraying auxiliary atomized airflow are arranged around the spray nozzle; each of the spray outlets is connected to the air pump; the recovery tank is used to collect residual paint after spraying; and the cleaning tank is selectively connected to the spraying and stirring mechanism through a valve.

[0006] Preferably, the spray head is provided with an annular air passage, and the air inlet of all spray nozzles is connected to this passage. An air pipe connector connected to an air pump is provided on this passage.

[0007] Furthermore, each of the spray nozzles is rotatably disposed within the spray head and is driven synchronously by a rotary drive mechanism. The rotary drive mechanism includes a rotating double-sided gear ring, a rotating motor, a first rotating gear, and multiple second rotating gears, achieving synchronous rotation of all nozzles through gear meshing.

[0008] As another preferred option, the air outlet of the spray nozzle is inclined relative to the axis of the spray nozzle to form a converging, parallel or diverging airflow field to adapt to different spraying needs.

[0009] The spraying and mixing mechanism includes a spraying and mixing drum, a mixing motor, a partition, and a mixing frame, forming an upper and lower isolated structure. A scraper can be installed on the mixing frame for scraping off paint adhering to the drum wall. The spraying and conveying mechanism includes a conveying pump and corresponding pipelines. The handheld frame contains an axially adjustable movable frame for fine-tuning the working distance of the spray head.

[0010] The beneficial effects of this invention are: 1. This invention addresses the core pain points: by using airflow-coordinated atomization and precise structure adjustment, it completely solves the problems of poor atomization, paint mist waste, easy nozzle clogging, and low coating adhesion in existing handheld spraying devices, thus better adapting to the anti-corrosion spraying needs of wire conveyor racks.

[0011] 2. This invention is adaptable to complex scenarios: The device is integrated into the conveyor trolley, making it portable and flexible, and can adapt to the operational needs of different scenarios such as outdoor plains, mountains, and coastal areas; the handheld mechanism is adjustable and the conveying pipe is deformable, which can adapt to the complex structure of the wire conveying rack, and achieve all-round spraying without dead angles.

[0012] 3. This invention improves work efficiency and quality: The integrated design of mixing, conveying and spraying reduces the time between processes; the coating is evenly mixed, has a good atomization effect, and the coating adheres firmly, which can effectively reduce the corrosion rate of the conveyor frame, reduce maintenance costs, avoid power safety accidents caused by corrosion of the spraying pipe, and ensure the stable operation of the power system.

[0013] 4. This invention is energy-saving, environmentally friendly, and easy to maintain: the scraping structure reduces paint waste; airflow suppresses paint mist diffusion, meeting environmental protection requirements; the detachable cylinder cover and simple transmission structure facilitate equipment cleaning, maintenance, and component replacement, reducing equipment operation and maintenance difficulty. Simultaneously, the spray head adopts a quick-release design, combined with an independent recovery tank and an integrated cleaning tank, which can quickly recover remaining paint to reduce waste and thoroughly remove residual paint from the pipes, fundamentally solving the clogging problem and reducing maintenance intensity and downtime. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below.

[0015] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 1 .

[0016] Figure 2 This is a schematic diagram of the three-dimensional structure of the present invention. Figure 2 .

[0017] Figure 3 This is a three-dimensional structural diagram of the spraying and stirring mechanism in this invention.

[0018] Figure 4 This is a top view of the handheld spraying mechanism in this invention.

[0019] Figure 5 for Figure 4 A cross-sectional view along line AA.

[0020] Figure 6 This is a three-dimensional structural diagram of the handheld spraying mechanism in this invention.

[0021] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0022] Figure 8 This is a three-dimensional structural diagram of the spray head in this invention.

[0023] Figure 9 This is a schematic diagram of the three-dimensional structure of the spray nozzle in this invention. Figure 1 .

[0024] Figure 10 This is a schematic diagram of the three-dimensional structure of the spray nozzle in this invention. Figure 2 .

[0025] Figure 11 for Figure 10 A magnified view of point C in the middle.

[0026] Explanation of reference numerals in the attached figures: 1. Conveying trolley; 11. Battery; 12. Air pump; 2. Spraying and mixing mechanism; 20. Spraying and mixing drum; 200. Partition plate; 21. Drum cover; 22. Mixing motor; 23. Mixing and spraying pipe; 24. Mounting sleeve; 25. Pressure pump; 26. Scraper; 27. Inclined scraper; 3. Spraying and conveying mechanism; 31. Conveying pump; 32. Feed pipe; 33. Discharge pipe; 34. Extension pipe; 4. Handheld spraying mechanism; 400. Handheld frame; 401. Mobile frame; 402. 403. Spray head; 404. Rotary handwheel; 405. Rotary shaft; 406. Rotary gear; 407. Moving toothed plate; 408. Spray nozzle; 409. Locking element; 411. Handle; 412. Rotating motor; 413. Rotating double-sided gear ring; 420. First rotating gear; 421. Spray air outlet; 422. Second rotating gear; 423. Air pipe connector; 424. Annular air passage; 5. Recovery tank; 51. Recovery port; 6. Cleaning tank; 61. Valve. Detailed Implementation

[0027] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0028] like Figures 1 to 3 As shown, the present invention provides a coating spraying device for a wire conveyor frame, the core of which is an integrated mobile workstation. The conveyor trolley 1 serves as a carrying platform, equipped with casters for easy movement on the construction site. The conveyor trolley 1 is equipped with a battery 11 to power all electrical equipment, and an air pump 12. As a carrier, the conveyor trolley 1 integrates three core mechanisms: spray mixing, spray conveying, and handheld spraying. Power and airflow support are provided by the battery 11 and air pump 12, enabling integrated operation of mixing, pressurizing, conveying, precisely spraying, and atomizing the anti-corrosion coating.

[0029] The conveying trolley 1 is equipped with a spraying and mixing mechanism 2, a spraying and conveying mechanism 3, a handheld spraying mechanism 4, a recycling tank 5, and a cleaning tank 6 on its carrying platform.

[0030] The spraying and mixing mechanism 2 includes a spraying and mixing drum 20, a drum cover 21, a mixing motor 22, and a mixing frame 23, responsible for the storage, mixing, and pre-pressurization of the coating. Its main body is a vertically arranged spraying and mixing drum 20. A mounting sleeve 24 is provided at the bottom of the spraying and mixing drum 20, and the spraying and mixing drum 20 is fixedly mounted on the conveying trolley 1 via the mounting sleeve 24. The drum cover 21 is located at the top of the spraying and mixing drum 20 for easy opening and feeding. A horizontal partition 200 is provided inside the spraying and mixing drum 20, dividing the inner cavity of the spraying and mixing drum 20 into an upper mixing chamber and a lower sealed motor chamber. The mixing motor 22 is fixed inside the motor chamber, and its main shaft extends into the mixing chamber through a sealed bearing hole in the center of the partition 200. The mixing frame 23 is installed at the end of the main shaft and rotates with the motor to efficiently mix the coating and prevent sedimentation.

[0031] To improve mixing efficiency and reduce waste, a scraper 26 is radially mounted on the mixing frame 23. The outer edge of the scraper 26 is in close contact with the inner wall of the spray mixing cylinder 20. More preferably, on the side of the scraper 26 facing the direction of mixing rotation, an oblique scraper 27 is provided at an acute angle (see...). Figure 3 When the mixing frame 23 rotates, the scraper 26 scrapes off the paint adhering to the cylinder wall, and the inclined scraper 27 guides the scraped paint to the mixing center to achieve circulating mixing and effectively prevent the paint from solidifying and accumulating on the wall surface.

[0032] To further assist in the delivery of high-viscosity coatings, a small booster pump 25 is installed on the top of the spray mixing drum 20 (on the drum cover 21). When spraying needs to be started, the booster pump 25 can be turned on briefly to inject a small amount of air into the mixing drum 20, forming a slight positive pressure, which helps the delivery pump 31 to smoothly draw in the material.

[0033] The spraying and conveying mechanism 3 is responsible for stably conveying the mixed paint to the handheld spraying mechanism 4. It mainly consists of a conveying pump 31 (preferably a corrosion-resistant diaphragm pump or plunger pump), an inlet pipe 32, and an outlet pipe 33. The conveying pump 31 is fixedly mounted on the platform of the conveying trolley 1. One end of the inlet pipe 32 is connected to the spraying mixing drum 20, and the other end is connected to the inlet of the conveying pump 31. The outlet pipe 33 is a flexible corrugated pipe, with one end connected to the outlet of the conveying pump 31 and the other end leading to the handheld spraying mechanism 4.

[0034] In this embodiment, the delivery pump 31 and the pressure pump 25 work together to achieve stable and efficient delivery of the coating, preventing high-viscosity coating from clogging the pipes. The corrugated discharge pipe 33 has good flexibility and, together with the handheld spraying mechanism 4, can adapt to various angle adjustments and movements, easily handling the complex structure of the wire conveyor frame, such as nodes, corners, and high positions, breaking the operational limitations of fixed delivery pipes. The pipe connection structure is simple and has strong sealing performance, which can reduce coating leakage and waste, and reduce the environmental pollution risk of outdoor operations.

[0035] like Figures 4 to 7 As shown, the handheld spraying mechanism 4 is the part that directly performs the spraying operation, combining flexibility and precise adjustment. It includes a handheld frame 400 for the operator to hold with both hands, and has two handles 409. The handheld frame 400 has an axially continuous rectangular or circular channel machined inside. A movable frame 401 is slidably mounted within the channel of the handheld frame 400. An extended pipe 34 for conveying paint is opened inside the movable frame 401, running from front to back. The rear end of the extended pipe 34 (movable frame 401) is connected to the discharge pipe 33, and the front end of the extended pipe 34 (movable frame 401) is detachably fixed with a spray head 402 via a threaded structure, facilitating replacement after blockage and reducing maintenance costs. Simultaneously, after the spray head 402 is removed, unused paint can be discharged into the recovery tank 5 for storage, avoiding waste or solidification in the spray mixing drum 20. Paint is drawn from the discharge pipe 33, enters the extended pipe 34, and ultimately reaches the spray head 402. In another embodiment, the connection between the spray head 402 and the movable frame 401 can also be replaced by other quick-connect structures that are readily conceived by those skilled in the art.

[0036] like Figure 7 As shown, to achieve fine-tuning of the spraying distance, the handheld frame 400 is equipped with an adjustment mechanism for driving the sliding of the movable frame 401. This mechanism includes a rotating shaft 404 that passes through the handheld frame 400 via a bearing, with a rotating hand disc 403 fixedly connected to one end and a rotating gear 405 fixedly connected to the other end. A movable toothed plate 406 is fixedly installed along the length of the movable frame 401, and the rack of the movable toothed plate 406 meshes with the rotating gear 405. By rotating the hand disc 403, the movable frame 401, along with the spray head 402, can be precisely driven to slide back and forth. A locking element 408 (locking bolt) is also provided on the side of the handheld frame 400, penetrating into the interior of the handheld frame 400. After adjustment, tightening the locking element 408 on the side of the handheld frame 400 will cause its end to press against the movable frame 401, achieving a secure lock.

[0037] like Figures 6 to 11 As shown, the spray head 402 is the core component for achieving efficient atomization. Its central spray nozzle 407 is connected to the extended pipe 34. The leap in atomization capability stems from its unique airflow design: multiple (12 in this embodiment) spray outlets 421 are evenly distributed in a ring around the spray nozzle 407. All spray outlets 421 are not independently supplied with air. As... Figure 5As shown, a fixed annular air passage 424 is machined or embedded within the spray head housing. This passage is a closed annular cavity with only one air pipe connector 423 for connecting to the main air supply pipe from the air pump 12. Each spray nozzle 421 has a radial air hole at the base of its rotating shaft 420, which communicates with the annular air passage 424. Thus, the compressed air supplied by the air pump 12 enters the annular air passage 424 through a single pipe and is evenly distributed to all spray nozzles 421, ensuring absolute consistency in air pressure and flow rate at each point.

[0038] To ensure that this uniform airflow dynamically acts on the paint jet, a rotary drive mechanism is integrated within the spray head 402. For example... Figures 8 to 11 As shown, a miniature rotary motor 411 is fixed to the housing, and its main shaft has a first rotary gear 413 meshing with the inner ring gear of a rotary double-sided gear ring 412. The rotary double-sided gear ring 412 is supported in the housing by bearings and can rotate freely. Each spray nozzle 421 has a second rotary gear 422 fixed on its shaft 420. All second rotary gears 422 mesh with the outer ring gear of the rotary double-sided gear ring 412. When the rotary motor 411 is started, it drives the rotary double-sided gear ring 412 to rotate through the gear system, thereby driving all second rotary gears 422 and the spray nozzles 421 to rotate synchronously, in the same direction, and at the same speed.

[0039] As an optimization, the nozzle axis of each spray nozzle 421 is not radial, but designed to be tilted at an angle (e.g., 5°-30°) relative to the axis of the spray nozzle 407. When they rotate synchronously, they generate a tilted, rotating surrounding airflow field. This airflow field creates a strong dynamic shear force (atomization) on the central paint jet, while simultaneously forming a centripetal air curtain barrier (constraint effect) and continuously purging the area around the nozzle (self-cleaning effect).

[0040] In this embodiment, the surrounding rotating airflow and the paint sprayed from the nozzle 407 work synergistically to significantly improve the atomization effect of high-viscosity paint, resulting in finer paint particles that adhere evenly to the surface of the conveyor frame. This enhances the adhesion between the coating and the frame, effectively resisting corrosion from outdoor oxidation, salt spray, and rain, and extending the service life of the conveyor frame. The rotating airflow can promptly blow away residual paint near the nozzle, preventing the nozzle 407 from clogging and improving the stability of equipment operation. At the same time, the airflow can suppress the diffusion of paint mist, reducing material waste and environmental pollution, thus meeting the environmental protection requirements of complex outdoor operating scenarios.

[0041] In this embodiment, the paint spraying device also includes a cleaning and recycling system, which solves the pain point of post-construction maintenance and consists of a recycling tank 5 and a cleaning tank 6.

[0042] The recycling tank 5 is an independent container with a recycling port 51 on its top. It is placed at a designated location on the conveyor trolley 1 (in this embodiment, it is located on top of the battery casing 11). After the spraying operation is completed, the spray head 402 is disassembled, the end of the discharge pipe 33 is aligned with the recycling port 51 of the recycling tank 5, and the conveying pump 31 is started to briefly empty the container. This allows the residual paint in the pipe and the spray mixing drum 20 to be recycled, preventing it from hardening.

[0043] Cleaning tank 6: Located on the side wall of the spray mixing drum 20, and selectively connected to the spray mixing drum 20 via valve 61. Cleaning tank 6 contains cleaning fluid. When cleaning is required, valve 61 is opened to allow the cleaning fluid to enter the spray mixing drum 20; then the spray head 402 is installed, and the delivery pump 31 is started to continuously spray the cleaning fluid from the spray head 402 (into a dedicated recovery tank), thereby cleaning the pipeline through which the paint passes. Alternatively, if there is no dedicated recovery tank for immediate discharge, to ensure timely cleaning and avoid environmental pollution, valve 61 can be opened first to allow the cleaning fluid to enter the spray mixing drum 20, then the spray head 402 can be placed into the cleaning tank 6, and the delivery pump 31 can be started to pump the cleaning fluid from the cleaning tank 6 into the entire paint flow path (mixing drum, pump, pipeline) for circulation and flushing. Finally, valve 61 is closed to allow all the liquid to be discharged into the cleaning tank 6 for temporary storage.

[0044] The cleaning and recycling system in this embodiment has two cleaning modes. When there is a dedicated recycling tank, the waste liquid can be sprayed out and collected directly for centralized treatment. When there is no recycling tank, the cleaning liquid can be circulated within the system and then temporarily stored in the cleaning tank 6, ensuring timely cleaning under any circumstances and avoiding indiscriminate discharge of cleaning waste liquid, which meets environmental protection requirements. At the same time, it extends the service life of components such as pipes, pumps, and spray heads, and reduces maintenance costs. In addition, the cleaning process can be started quickly without disassembling pipes or complicated operations, reducing equipment downtime.

[0045] Workflow summary: Preparation: Add the paint to the spray mixing drum 20 and cover it with the drum cap 21. Install the spray head 402 and connect all pipes and air lines.

[0046] Spraying: Start the mixing motor 22, air pump 12, and rotary motor 411. Adjust the handheld frame 400 to the appropriate length and lock it. After mixing is complete, operate the delivery pump 31 to spray the paint through atomization.

[0047] Recovery: After the operation is completed, turn off the transfer pump 31 and the rotating motor 411. Disassemble the spray head 402, align the paint outlet of the extended pipe 34 with the recovery tank 5, and jog the transfer pump 31 to discharge the remaining material.

[0048] Cleaning: Preferably, the spray nozzle 402 is placed into the cleaning tank 6. Valve 61 is opened, and the delivery pump 31 is started for circulating cleaning. The stirring motor 22 can be turned on to enhance the cleaning effect of the spray mixing drum 20.

[0049] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A paint spraying device for a wire conveyor frame, comprising: A conveying trolley (1) is characterized in that it is provided with a spraying and mixing mechanism (2), a spraying and conveying mechanism (3), a handheld spraying mechanism (4), an air pump (12), a recovery tank (5), and a cleaning tank (6). The input end of the spraying and conveying mechanism (3) is connected to the spraying and mixing mechanism (2), and the output end is connected to the handheld spraying mechanism (4). The handheld spraying mechanism (4) includes a handheld frame (400) and a detachable part disposed at the end of the handheld frame (400). The spray head (402) is provided with a spray nozzle (407) for spraying paint, and at least two spray outlets (421) for spraying auxiliary atomizing airflow are arranged around the spray nozzle (407). Each of the spray outlets (421) is connected to the air pump (12). The recovery tank (5) is used to receive the residual paint after the spraying is completed. The cleaning tank (6) is selectively connected to the spraying stirring mechanism (2) through a valve (61).

2. The paint spraying device for wire conveying racks according to claim 1, characterized in that: The spray head (402) is provided with an annular air passage (424), and the air inlet of each spray outlet (421) is connected to the annular air passage (424). The annular air passage (424) is provided with an air pipe connector (423) connected to the air pump (12).

3. The paint spraying device for wire conveying racks according to claim 2, characterized in that: Each of the spray nozzles (421) is rotatably disposed within the spray head (402), and the spray head (402) is also provided with a rotary drive mechanism for driving each spray nozzle (421) to rotate synchronously.

4. The paint spraying device for wire conveying racks according to claim 3, characterized in that: The rotary drive mechanism includes a rotating double-sided gear ring (412) rotatably disposed in the spray head (402), a rotating motor (411) fixedly disposed in the spray head (402), a first rotating gear (413) fixedly connected to the main shaft of the rotating motor (411), and a second rotating gear (422) coaxially fixed to each of the spray air outlets (421). The first rotating gear 413 meshes with the inner ring gear of the rotating double-sided gear ring (412), and the second rotating gear (422) meshes with the outer ring gear of the rotating double-sided gear ring (412).

5. The paint spraying device for wire conveying racks according to claim 1, characterized in that: The air outlet direction of the spray nozzle (421) is inclined relative to the axis of the spray nozzle (407).

6. The paint spraying device for wire conveying racks according to claim 1, characterized in that: The spraying and mixing mechanism (2) includes a spraying and mixing drum (20) disposed on the conveying trolley (1), a mixing motor (22) disposed at the bottom of the spraying and mixing drum (20), a partition (200) disposed inside the spraying and mixing drum (20) and above the mixing motor (22), and a mixing frame (23) disposed inside the spraying and mixing drum (20) and above the partition (200). The mixing frame (23) is connected to the main shaft of the mixing motor (22).

7. The paint spraying device for wire conveying racks according to claim 6, characterized in that: The top of the spray mixing drum (20) is equipped with a pressure pump (25) for increasing the internal pressure of the spray mixing drum (20).

8. The paint spraying device for wire conveying racks according to claim 6, characterized in that: The mixing frame (23) is provided with a scraper (26), the outer edge of which is adapted to the inner wall of the spray mixing cylinder (20) and is used to scrape off the paint on the inner wall of the spray mixing cylinder (20) during the mixing process.

9. The paint spraying device for wire conveying racks according to claim 1, characterized in that: The spraying conveying mechanism (3) includes a conveying pump (31), which is connected to the spraying mixing drum (20) through the feed pipe (32) and to the spraying head (402) through the discharge pipe (33) and the handheld frame (400).

10. The paint spraying device for wire conveying racks according to claim 9, characterized in that: The handheld frame (400) has an axially penetrating channel inside, and a movable frame (401) that can slide along the axial direction of the handheld frame (400) is provided in the channel. An extended pipe (34) for conveying paint is provided inside the movable frame (401). The handheld frame (400) is provided with an adjustment mechanism for driving the movable frame (401) to slide and a locking member (408) for locking its position.

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