Efficient insulation UEW polyurethane coating device

Abstract

The utility model relates to the technical field of spraying, and discloses an efficient insulation UEW polyurethane coating device which comprises a spraying gun, a spraying pipe and a built-in control assembly, a spiral channel is formed in the spraying pipe and a spiral plate, a coating flowing path is prolonged to stabilize the flowing speed and reduce bubble entrainment, and impurities are filtered through sealing discs at the two ends; a rotating roller and a shifting plate on the mounting seat are matched with a coil spring and are regularly and mildly shifted after being impacted by the coating, internal bubbles are separated, and the problem that bubbles are generated by traditional stirring is avoided; the air valves correspond to the spiral channels in a one-to-one mode, air at the tops of the channels is exhausted in time, and coating basically has no bubbles. When a wire is coated with the bubble-free coating, a complete and uniform coating can be formed, the defects of pinholes, cavities and the like are avoided, heating is uniform during curing, and the insulation requirement of high-end equipment is met. The coating can be reused without additional bubble removal after being recycled, so that waste and working procedures are reduced; a bubble-free coating reduces the reject ratio, the quality stability is improved, and the automatic design is adaptive to efficient production; and coating waste and heat loss are reduced.

Description

Technical Field

[0001] This utility model relates to the field of spraying technology, and in particular to a high-efficiency insulating UEW polyurethane coating device. Background Technology

[0002] As a core winding material for electronic and electrical equipment such as motors, transformers, and inductors, the performance of the surface insulation coating of UEW directly determines the temperature resistance, insulation strength, and service life of the equipment. Due to its excellent solvent resistance, elasticity, and dielectric properties, polyurethane coating has become the mainstream insulation coating material for medium- and high-frequency motor windings, and is widely used in high-end fields such as new energy vehicle drive motors, industrial servo motors, and consumer electronics transformers.

[0003] In industrial UEW (Universal Electrolytic Wafer) production, the coating unit is a key piece of equipment determining product quality and production efficiency. Currently, most commonly used UEW polyurethane coating units in the industry employ traditional processes such as "dip coating and drying" or "spray coating and curing," which have significant technical shortcomings in practical applications, particularly in handling coating air bubbles. During the operation of traditional units, air bubbles are easily introduced into the coating during stirring, flow, or recycling. If these bubbles are not removed in time, they will adhere to the surface of the conductor with the coating, leading to defects such as pinholes and voids in the coating, severely damaging insulation performance. Consequently, some products fail to meet usage requirements, necessitating additional screening and testing, and increasing production costs.

[0004] Although some devices incorporate a recirculation structure to recover excess coating, the bubble problem during recovery is not only unresolved but may actually be exacerbated by coating agitation, requiring additional processing before reuse. This increases process complexity and wastes coating. Furthermore, the presence of bubbles affects coating uniformity, interferes with subsequent curing, and further reduces product quality stability, making it difficult to meet the high-precision insulation performance requirements of high-end electronic and electrical equipment. In addition, traditional devices suffer from low thermal efficiency, insufficient environmental friendliness, and reliance on manual automation, falling short of the efficient and green production demands of modern industry. Utility Model Content

[0005] The technical problem to be solved by this invention is that existing technologies have the disadvantage of difficulty in removing air bubbles. To address this, we propose a high-efficiency insulating UEW polyurethane coating device.

[0006] To achieve the above objectives, this application adopts the following technical solution: a high-efficiency insulating UEW polyurethane coating device, comprising a spray gun, a spray pipe threadedly connected to the output end of the spray gun, a control component built into the spray pipe, the control component comprising a spiral plate, the spiral plate being placed inside the spray pipe, a spiral channel being formed between the spiral plate and the spray pipe, a closed disc being fixedly connected to both ends of the spiral plate, multiple mounting seats being arranged between the multiple spiral plates, one side of the mounting seat being fixedly connected to the inner wall of the spray pipe, an installation window being opened on the side of the mounting seat near the center of the spray pipe, fixing grooves being opened on both sides of the inner wall of the installation window, a rotating roller being built into the fixing groove, a coil spring being sleeved at both ends of the rotating roller, a toggle plate being fixedly sleeved on the surface of the rotating roller, and multiple air valves being fixedly connected to the top of the spray pipe.

[0007] Preferably, a handle is fixedly connected to the bottom of the spray gun.

[0008] Preferably, a material pipe is fixedly connected to the tail of the spray gun.

[0009] Preferably, the spiral plate coincides with the axis of the nozzle, and the spiral plate is fixedly connected to the inner wall of the nozzle.

[0010] Preferably, the surface of the closed disk has multiple through-hole filter holes.

[0011] Preferably, both ends of the rotating roller are rotatably connected to the bottom of the inner cavity of the fixed groove.

[0012] Preferably, one end of the coil spring is fixedly connected to the rotating roller, and the other end of the coil spring is fixedly connected to the inner wall of the fixed groove.

[0013] Preferably, the plurality of the gas valves are respectively disposed at the top of the multi-layer spiral channel.

[0014] The technical effects and advantages of this utility model are as follows:

[0015] This invention utilizes a spray gun, spray pipe, and built-in control components as its core. Inside the spray pipe, a spiral plate constructs a spiral channel, extending the paint flow path to stabilize the flow rate and reduce bubble entrainment. Sealed discs at both ends filter impurities. Rotating rollers, actuating plates, and coil springs on the mounting base work together to gently and rhythmically actuate upon impact with the paint, separating internal bubbles and avoiding the foaming problems associated with traditional agitation. Air valves correspond one-to-one with the spiral channel, promptly venting gas from the top of the channel. Through a triple defoaming process of "preliminary defoaming, bubble separation, and exhaust," the paint is essentially bubble-free. When this bubble-free paint is applied to conductors, it forms a complete and uniform coating, avoiding defects such as pinholes and voids. During curing, it heats evenly, meeting the insulation requirements of high-end equipment. Compared to traditional equipment, the paint can be reused after recycling without additional defoaming, reducing waste and processes. The bubble-free coating reduces the defect rate, improves quality stability, and its automated design is adapted for efficient production. It also reduces paint waste and heat loss, aligning with green principles, ultimately lowering production costs and simplifying the production process. Attached Figure Description

[0016] The disclosure of this utility model is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. In the drawings, the same reference numerals are used to refer to the same parts:

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the overall exploded structure of this utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of the nozzle of this utility model;

[0020] Figure 4 This is a schematic diagram of the control component structure of this utility model;

[0021] Figure 5 For the present utility model Figure 4 Enlarged structural diagram at point A in the middle.

[0022] Legend: 1. Spray gun; 101. Material pipe; 102. Handle; 2. Spray nozzle; 3. Control components; 301. Spiral plate; 302. Enclosed disc; 303. Filter hole; 304. Spiral channel; 305. Mounting base; 306. Mounting window; 307. Fixing groove; 308. Rotating roller; 309. Coil spring; 310. Actuating plate; 311. Air valve. Detailed Implementation

[0023] It is readily understood that, based on the technical solution of this utility model, those skilled in the art can propose various interchangeable structural methods and implementations without altering the essential spirit of this utility model. Therefore, the following detailed embodiments and accompanying drawings are merely illustrative descriptions of the technical solution of this utility model and should not be considered as the entirety of this utility model or as limitations or restrictions on the technical solution of this utility model.

[0024] Reference Figures 1 to 5 As shown, this utility model provides a technical solution: a high-efficiency insulating UEW polyurethane coating device, including a spray gun 1, a handle 102 fixedly connected to the bottom of the spray gun 1, a material tube 101 fixedly connected to the tail of the spray gun 1, a spray pipe 2 threadedly connected to the output end of the spray gun 1, a control component 3 built into the spray pipe 2, the control component 3 including a spiral plate 301, the spiral plate 301 is placed inside the spray pipe 2, the spiral plate 301 and the spray pipe 2 have their axes coincident, the spiral plate 301 is fixedly connected to the inner wall of the spray pipe 2, a spiral channel 304 is formed between the spiral plate 301 and the spray pipe 2, a closed disc 302 is fixedly connected to both ends of the spiral plate 301, the closed disc 302 has a plurality of filter holes 303 that penetrate through itself on its surface, the polyurethane coating is transported to the inside of the spray gun 1 through the material tube 101 connected to the tail of the spray gun 1, and after being guided by the spray gun 1, it enters the spray pipe 2 threadedly connected to its output end. The control component 3 built into the nozzle 2 is the core of achieving efficient coating. The spiral plate 301, aligned with the axis of the nozzle 2 and fixed to the inner wall, directly constructs a spiral coating output channel. The key function of this structure is to extend the flow path of the coating. After entering the spiral channel 304, the coating no longer flows rapidly in a straight line as in traditional devices, but rather moves slowly along a spiral trajectory. This makes the flow rate more stable, fundamentally reducing the possibility of air being entrained into the coating due to sudden changes in flow rate. Simultaneously, the closed discs 302 fixed at both ends of the spiral plate 301, with multiple through-filter holes 303 on their surfaces, perform preliminary filtration of the coating as it flows, intercepting any tiny impurities that may be present in the coating and preventing them from adhering to the surface of the conductors and damaging the insulation performance. More importantly, the extended flow path provides sufficient time for the release of existing microbubbles within the coating. Some bubbles will naturally rise during the slow flow of the coating, initially reducing the bubble content in the coating and laying the foundation for reducing pinholes, voids, and other defects in subsequent coating processes.

[0025] Furthermore, multiple mounting seats 305 are provided between the multi-layer spiral plates 301. One side of each mounting seat 305 is fixedly connected to the inner wall of the nozzle 2. A mounting window 306 is provided on the side of each mounting seat 305 near the center of the nozzle 2. Fixing grooves 307 are provided on both sides of the inner wall of the mounting window 306. A rotating roller 308 is housed within each fixing groove 307. Both ends of the rotating roller 308 are rotatably connected to the bottom of the inner cavity of the fixing groove 307. Coil springs 309 are sleeved on both ends of the rotating roller 308. One end of the coil spring 309 is fixedly connected to the rotating roller 308, and the other end is fixedly connected to the inner wall of the fixing groove 307. A toggle plate 310 is fixedly sleeved on the surface of the rotating roller 308. Multiple air valves 311 are fixedly connected to the top of the nozzle 2, and these air valves 311 are respectively located at the top of the multi-layer spiral channel 304. The multiple mounting seats 305 fixed to the inner wall of the nozzle 2 provide stable support for the defoaming auxiliary structure. The mounting base 305 has a mounting window 306 on the side near the center of the nozzle 2. A rotating roller 308 is installed in the fixing groove 307 on both sides of the inner wall of the window. The two ends of the rotating roller 308 are not only rotatably connected to the bottom of the fixing groove 307 to ensure flexible rotation, but the coil spring 309 can store the restoring force when the rotating roller 308 rotates. When the paint flows continuously in the spiral channel 304, it will continuously impact the actuating plate 310 fixed on the surface of the rotating roller 308. Under the action of the impact force, the actuating plate 310 will drive the rotating roller 308 to rotate around the axis, while stretching or compressing the coil spring 309. When the impact force of the paint on the actuating plate 310 weakens, the coil spring 309 will drive the rotating roller 308 to return to its original position by its own elastic force, so that the actuating plate 310 can move back and forth regularly. This agitation is not the disorderly stirring that aggravates bubble generation in traditional devices, but a gentle and controllable mechanical action: it can break the aggregation of bubbles inside the coating, separate the tiny bubbles that were originally attached to the inside of the coating to the surface of the coating, and make it easier for the hidden bubbles to be discharged by the subsequent structure, fundamentally solving the pain point of "stirring up bubbles" in the traditional recycling process.

[0026] Multiple air valves 311 correspond one-to-one with the multi-layer spiral channel 304, forming a targeted exhaust system. When air bubbles in the coating are separated to the surface by the flow in the spiral channel 304 and the action of the agitator plate 310, and flow with the coating to the top of the spiral channel 304, the air valves 311 will open in time to quickly discharge the gas accumulated at the top of the channel out of the nozzle 2, ensuring that the discharged gas will not mix with the coating again. After the triple defoaming process of "initial defoaming in the spiral channel 304, separation of air bubbles by the agitator plate 310, and gas discharge by the air valves 311", the polyurethane coating flowing out of the nozzle 2 is basically free of air bubbles. When this bubble-free coating is applied to the conductor, it forms a continuous and complete coating, completely avoiding insulation defects such as pinholes and voids caused by bubbles in traditional devices. At the same time, the bubble-free coating is more evenly distributed during the coating process, and there will be no uneven coating thickness in some areas. This not only directly improves the insulation performance of the coating, but also ensures that all parts of the coating are heated evenly in the subsequent curing process, and that the curing reaction is sufficient and stable. It effectively solves the problem of "bubble interference with curing effect" in traditional devices, thereby meeting the high-precision requirements of high-end electronic and electrical equipment for UEW insulation performance, reducing the additional screening and testing steps caused by product defects, and significantly reducing production costs.

[0027] Compared to traditional equipment, this device boasts several significant advantages. Regarding paint utilization efficiency, because the device performs defoaming and impurity filtration throughout the paint flow process, even excess paint generated during coating is recovered without the need for further defoaming. This eliminates the need for complex defoaming treatments and allows for direct reuse, reducing paint waste and eliminating the need for traditional post-recovery processing, thus significantly simplifying the production process. In terms of product quality and production efficiency, the bubble-free, uniform coating greatly reduces the defect rate, improves product quality stability, and reduces the workload of manual screening and inspection.

[0028] The technical scope of this utility model is not limited to the content described above. Those skilled in the art can make various modifications and variations to the above embodiments without departing from the technical concept of this utility model, and all such modifications and variations should fall within the protection scope of this utility model.

Claims

1. A high-efficiency insulating UEW polyurethane coating device, characterized in that, The system includes a spray gun, the output end of which is threadedly connected to a spray pipe. A control component is built into the spray pipe, and the control component includes a spiral plate placed inside the spray pipe, forming a spiral channel between the spiral plate and the spray pipe. Sealing discs are fixedly connected to both ends of the spiral plate. Multiple mounting seats are arranged between the multiple spiral plates. One side of each mounting seat is fixedly connected to the inner wall of the spray pipe. An installation window is provided on the side of the mounting seat near the center of the spray pipe. Fixing grooves are provided on both sides of the inner wall of the installation window. Rotating rollers are built into the fixing grooves. Coil springs are sleeved at both ends of the rotating rollers. A toggle plate is fixedly sleeved on the surface of the rotating rollers. Multiple air valves are fixedly connected to the top of the spray pipe.

2. The high-efficiency insulating UEW polyurethane coating device according to claim 1, characterized in that: A handle is fixedly connected to the bottom of the spray gun.

3. The high-efficiency insulating UEW polyurethane coating device according to claim 1, characterized in that: A material tube is fixedly connected to the tail of the spray gun.

4. The high-efficiency insulating UEW polyurethane coating device according to claim 1, characterized in that: The spiral plate coincides with the axis of the nozzle, and the spiral plate is fixedly connected to the inner wall of the nozzle.

5. The high-efficiency insulating UEW polyurethane coating device according to claim 1, characterized in that: The surface of the closed disk has multiple filter holes that penetrate through it.

6. The high-efficiency insulating UEW polyurethane coating device according to claim 1, characterized in that: The two ends of the rotating roller are rotatably connected to the bottom of the inner cavity of the fixed groove.

7. The high-efficiency insulating UEW polyurethane coating device according to claim 1, characterized in that: One end of the coil spring is fixedly connected to the rotating roller, and the other end of the coil spring is fixedly connected to the inner wall of the fixed groove.

8. The high-efficiency insulating UEW polyurethane coating device according to claim 1, characterized in that: Multiple air valves are respectively installed at the top of the multi-layer spiral channel.

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