A painting equipment and process for generator stator punching sheets

Abstract

This application relates to the technical field of stator punching sheet painting, and specifically discloses a painting device and process for a generator stator punching sheet, which includes a housing; a conveying mechanism; a painting mechanism, including a painting roller, a paint leveling roller and a scraper, the painting roller is a rubber roller, and the paint leveling roller is a stainless steel roller; a paint feeding mechanism, including a paint storage tank, a pump body, a paint feeding pipe and a connecting pipe; an exhaust mechanism, including a fan, a heating element, a first branch pipe and a second branch pipe, the first branch pipe is sleeved outside the connecting pipe, a first exhaust pipe is arranged on the first branch pipe, a second exhaust pipe is arranged on the second branch pipe, and the fan, the first branch pipe and the second branch pipe are connected in sequence. In this application, the first exhaust pipe blows air outwards, which can make the paint on the painting roller more evenly distributed; the second exhaust pipe blows air outwards, which can prevent the paint from accumulating at the scraper; the blown air is hot air, which can enhance the fluidity of the paint; therefore, the uniformity of the paint film thickness on the painting roller can be ensured, thus ensuring the painting effect.

Description

Technical Field

[0001] The present application relates to the technical field of stator punching painting, and particularly to a painting device and process for generator stator punchings. Background Art

[0002] The stator core of a motor is formed by stacking stator punchings. The stator punching is a key component in the motor, and its material, inner diameter, outer diameter, slot size, etc. have a direct impact on the energy consumption, working efficiency, noise, and service life of the motor. Therefore, in order to reduce the eddy current loss of the motor stator punching, it is necessary to coat a paint on its surface to protect the punching material from corrosion and play a certain insulation protection role, thereby reducing the eddy current loss of the motor stator punching.

[0003] The painting method of the stator punching often adopts the impregnation painting method, that is, during the painting process, the upper and lower painting rollers are completely soaked with the paint. When the stator punching passes between the two painting rollers, the paint is applied to both sides of the stator punching. This method can only be used for organic paints with strong fluidity. The inorganic components of organic paints are less and the fluidity is strong. When using inorganic water-soluble paints, since the main components of water-soluble inorganic paints are all solid inorganic substances and the fluidity is poor, the high viscosity and low fluidity of inorganic paints make it difficult to form a flat coating after dip coating, and defects such as orange peel and flow marks are likely to appear, thus affecting the painting effect. Summary of the Invention

[0004] In order to facilitate the application of water-soluble inorganic paint on the stator punching, the present application provides a painting device and process for generator stator punchings.

[0005] In a first aspect, the present application provides a painting device for generator stator punchings, adopting the following technical solution:

[0006] A painting device for generator stator punchings includes a housing and a conveying mechanism arranged on the housing, including a feeding component and a discharging component for conveying stator punchings;

[0007] A painting mechanism, including a painting roller, a leveling roller, and a scraper. The painting roller is a rubber roller, the leveling roller is a stainless steel roller, there are two painting rollers and two leveling rollers, and the scraper is pressed against the painting roller and the leveling roller;

[0008] A paint feeding mechanism, including a paint storage tank, a pump body, a paint feeding pipe, and a connecting pipe connected in sequence. The connecting pipe is arranged along the axis direction of the painting roller, and a plurality of liquid discharge pipes are arranged on the connecting pipe, and the openings of the liquid discharge pipes face the gap between the painting roller and the leveling roller;

[0009] The exhaust mechanism includes a blower, a heating element, a first branch pipe, and a second branch pipe. The first branch pipe is sleeved outside the connecting pipe, and a cavity is provided between the first branch pipe and the connecting pipe. A first exhaust pipe is provided on the first branch pipe, and the opening of the first exhaust pipe faces the gap between the painting roller and the paint leveling roller. The second branch pipe is arranged along the length direction of the doctor blade, and a second exhaust pipe is provided on the second branch pipe, and the opening of the second exhaust pipe faces the gap between the doctor blade and the painting roller. The blower, the first branch pipe, and the second branch pipe are connected in sequence, and the heating element is arranged on the air outlet side of the blower so that the blower discharges hot air outward through the first exhaust pipe and the second exhaust pipe.

[0010] By adopting the above technical solution, the two painting rollers paint the two sides of the stator punching simultaneously, improving the painting efficiency; the paint leveling roller is used to scrape off the excess paint on the painting roller to ensure that the thickness of the paint film on the surface of the painting roller is uniform and reduce coating defects; the first branch pipe and the first exhaust pipe can blow air towards the gap between the painting roller and the paint leveling roller, so that the falling paint can flow along the axial direction of the painting roller, thereby realizing the uniform arrangement of the falling paint and enabling the paint to be coated more evenly on the painting roller; the second branch pipe and the second exhaust pipe can blow air towards the gap between the doctor blade and the painting roller to accelerate the flow of the paint at the doctor blade towards both ends, thereby reducing the paint accumulated at the doctor blade and ensuring the scraping effect of the doctor blade; since the incoming air is hot air, it can heat the falling paint, thereby improving the fluidity of the inorganic water-soluble paint and helping to ensure the uniform application of the subsequent paint.

[0011] Optionally, a plurality of second exhaust pipes are provided, the second exhaust pipes are arranged at intervals along the length direction of the second branch pipe, the second exhaust pipes are inclined, and the opening directions of the second exhaust pipes at both ends of the second branch pipe face away from each other.

[0012] By adopting the above technical solution, the inclined second exhaust pipes can enhance the guiding effect on the paint at the doctor blade, enabling the paint scraped off by the doctor blade to flow towards both ends faster, thereby reducing the paint accumulated at the doctor blade.

[0013] Optionally, the feeding assembly includes a conveying roller and a first driving member. A cavity is provided inside the conveying roller, and rotary joints are rotatably connected to both ends of the conveying roller. One of the rotary joints is internally communicated with the first branch pipe, and the other rotary joint is internally communicated with the second branch pipe. The first driving member is used to drive the conveying roller to rotate.

[0014] By adopting the above technical solution, the conveying roller can be used to convey stator punching sheets; after the hot air in the first branch pipe flows into the cavity inside the conveying roller, the conveying roller can be heated up. The heated conveying roller can preheat the stator punching sheets to be painted, reduce the temperature difference between the stator punching sheets and the paint, thereby reducing the stress caused by thermal expansion and contraction, and helping to improve the bonding strength between the paint and the stator punching sheets; in addition, the preheating can also remove the moisture and condensates on the surface of the stator punching sheets, further enhancing the adhesion of the paint; after the hot air heats up the conveying roller, the temperature of the hot air decreases, so the air discharged through the second branch pipe and the second exhaust pipe has a lower temperature, which helps to reduce the temperature rise of the scraper. The curing speed of the paint increases with the increase of temperature, so reducing the temperature rise can prevent the paint attached to the scraper from curing due to the too high temperature of the scraper, thus ensuring the use effect of the scraper.

[0015] Optionally, a water inlet pipe is provided on the paint inlet pipe. The water inlet pipe is communicated with a water source, and a valve body is provided on the water inlet pipe.

[0016] By adopting the above technical solution, clean water or cleaning liquid can be introduced into the paint inlet pipe, and then the clean water or cleaning liquid is discharged through the drain pipe on the connecting pipe, so as to spray the surfaces of the paint application roller and the paint leveling roller, wash down the paint on the paint application roller and the paint leveling roller, and achieve cleaning; the clean water or cleaning liquid flowing into the paint inlet pipe and the connecting pipe can also wash down the paint attached to the inner walls of the paint inlet pipe and the connecting pipe, thereby preventing the paint on the inner walls from continuously accumulating and curing, which may affect the flow of the paint; the paint inlet pipe and the connecting pipe in this application can not only allow the paint to flow, but also allow clean water or cleaning liquid for cleaning to be introduced, so it helps to simplify the structure.

[0017] Optionally, an installation hole is provided on the connecting pipe. A blocking block is slidably arranged in the installation hole. A spring is connected between the blocking block and the connecting pipe. The spring makes the blocking block press tightly against the inner wall of the installation hole. A water delivery pipe is arranged between the first branch pipe and the second branch pipe. A three-way valve is arranged between the first branch pipe and the water delivery pipe. The three-way valve is respectively communicated with the first branch pipe, the water delivery pipe and the rotary joint near one end of the first branch pipe.

[0018] By adopting the above technical solution, the water pressure can be increased during spray cleaning. The water pressure can cause the stopper to slide out of the mounting hole, opening the mounting hole. At this time, the clear water in the connecting pipe can flow into the first branch pipe, then through the water delivery pipe into the second branch pipe, and then discharged through the second exhaust pipe on the second branch pipe to spray the scraper, washing off the paint adhering to the scraper, thereby realizing the spray cleaning of the scraper. The setting of the three-way valve can adjust the connection state of the first branch pipe. During the painting operation, the three-way valve connects the first branch pipe and the rotary joint at the end of the conveying roller, so that hot air can be conveyed into the conveying roller. During the cleaning operation, the three-way valve connects the first branch pipe and the water delivery pipe, so that the clear water in the first branch pipe can flow into the second branch pipe through the water delivery pipe.

[0019] Optionally, a check valve is connected to the rotary joint on the side close to the second branch pipe.

[0020] By adopting the above technical solution, the check valve can prevent the clear water in the second branch pipe from flowing into the conveying roller, ensuring the normal operation of the conveying roller.

[0021] Optionally, the discharging assembly includes a rotating rod and a second driving member. The rotating rod is rotatably connected to the housing. A plurality of toothed rollers are coaxially arranged on the rotating rod. The top side of the toothed roller is used to support the bottom wall of the stator punch. The second driving member is used to drive the rotating rod to rotate.

[0022] By adopting the above technical solution, the rotating toothed rollers can convey the painted stator punches. Since the linear velocity of the tooth tips of the toothed rollers is the same as the moving speed of the stator punches, and the contact area between the toothed rollers and the stator punches is small, the paint layer on the lower surface of the stator punches is not easily damaged during the conveying process, which helps to ensure the painting effect.

[0023] Optionally, a water tank is arranged on the housing below the rotating rod, and the toothed roller is located in the water tank.

[0024] By adopting the above technical solution, the water tank can be used to clean the toothed rollers, prevent the paint from accumulating on the toothed rollers, and reduce the equipment maintenance cost.

[0025] Optionally, a receiving tray for receiving the falling paint is arranged on the housing.

[0026] By adopting the above technical solution, the receiving tray can collect the paint falling during the painting process, reduce paint waste, and lower the production cost. It can also prevent the paint from dripping and polluting the equipment and the working environment, improving the cleanliness and service life of the equipment.

[0027] In a second aspect, the present application provides a process, adopting the following technical solution:

[0028] A processing method, applying the generator stator punch painting equipment described in any one of the above, includes the following steps:

[0029] a. The pump body transports the paint to the connecting pipe, and the paint in the connecting pipe is discharged through the drain pipe and falls to the gap between the painting roller and the leveling roller.

[0030] b. The painting roller and the leveling roller rotate in the same direction. The leveling roller scrapes off the excess paint on the painting roller, so that a paint film is formed on the surface of the painting roller. The scraped-off paint adheres to the leveling roller and is then scraped off by the scraper.

[0031] c. The feeding assembly feeds the stator punching into the space between the two painting rollers.

[0032] d. The two painting rollers rotate in opposite directions. The paint film on the surface of the upper painting roller is coated on the upper surface of the stator punching, and the paint film on the surface of the lower painting roller is coated on the lower surface of the stator punching.

[0033] e. The scraper scrapes off the paint on the painting roller.

[0034] f. The discharging assembly transports the stator punching to the next process.

[0035] By adopting the above technical solution, the painting roller and the leveling roller cooperate to achieve uniform painting of the stator punching, which helps to improve the painting efficiency and quality.

[0036] In summary, the present application includes the following beneficial technical effects:

[0037] 1. The painting roller is a rubber roller. The elasticity of the rubber roller enables it to better adapt to the unevenness of the surface of the stator punching. Even if the fluidity of the paint is poor, more uniform coating can be achieved through the deformation of the roller body and the pressure distribution, so as to facilitate the uniform coating of the water-soluble inorganic paint on the stator punching.

[0038] 2. The first branch pipe and the first exhaust pipe blow out air, which can make the paint distribution between the painting roller and the leveling roller more uniform, helping to ensure the uniformity of the paint film thickness on the surface of the painting roller; the second branch pipe and the second exhaust pipe blow out air, which can accelerate the flow of the paint between the scraper and the painting roller towards both ends, so that the paint is not easily accumulated at the scraper, helping to ensure the scraping effect of the scraper.

[0039] 3. The air blown out by the first branch pipe and the first exhaust pipe is hot air, so it can enhance the fluidity of the paint, helping the paint to flow smoothly; the air blown out by the second branch pipe and the second exhaust pipe is cooled and at a lower temperature, so it is not easy to cause the temperature of the scraper to be too high and the paint on the surface of the scraper to solidify.

[0040] 4. After the hot air in the first branch pipe flows into the conveying roller, the temperature of the conveying roller can be increased. The conveying roller can preheat the stator punching, thereby reducing the temperature difference between the stator punching and the paint, helping to ensure the coating effect of the paint. Description of the Drawings

[0041] Figure 1 is the overall structural schematic diagram of the embodiment of the present application;

[0042] Figure 2 is the cross-sectional view of the embodiment of the present application;

[0043] Figure 3 is Figure 2 the enlarged schematic diagram of part A in

[0044] Figure 4 is the schematic diagram for showing the connection relationship between each pipeline in the embodiment of the present application;

[0045] Figure 5 is the cross-sectional view from another perspective of the embodiment of the present application;

[0046] Figure 6 is Figure 5 the enlarged schematic diagram of part B in

[0047] Figure 7 is the structural schematic diagram for showing the position of the second branch pipe in the embodiment of the present application;

[0048] Figure 8 is Figure 7 the enlarged schematic diagram of part C in

[0049] Figure 9 is Figure 5 the enlarged schematic diagram of part D in

[0050] Reference numerals: 1, housing; 2, feeding assembly; 21, conveying roller; 211, rotary joint; 3, discharging assembly; 31, rotating rod; 311, toothed roller; 4, painting mechanism; 41, painting roller; 42, paint leveling roller; 43, scraper; 5, paint feeding mechanism; 51, paint storage tank; 52, paint feeding pipe; 53, connecting pipe; 531, drain pipe; 532, mounting hole; 533, limiting rod; 6, exhaust mechanism; 61, first branch pipe; 611, horizontal pipe; 6111, first exhaust pipe; 612, vertical pipe; 62, second branch pipe; 621, second exhaust pipe; 63, fan; 64, heating element; 7, water inlet pipe; 71, valve body; 8, stop block; 81, connecting block; 9, spring; 10, water delivery pipe; 11, three-way valve; 12, check valve; 13, air inlet pipe; 14, water tank; 15, receiving tray; 16, water tank; 17, stator punching sheet. Detailed Description of the Invention

[0051] The following Figures 1-9 further elaborates on the present application in detail.

[0052] The embodiment of the present application discloses a painting device for a generator stator punching sheet. Refer to Figure 1 and Figure 2, the generator stator punching sheet painting equipment includes a housing 1, as well as a conveying mechanism, a painting mechanism 4, and a paint feeding mechanism 5 provided on the housing 1.

[0053] Referring to Figure 2 , the conveying mechanism includes a feeding component 2 and a discharging component 3. The feeding component 2 and the discharging component 3 are respectively located on both sides of the housing 1. The feeding component 2 includes conveying rollers 21 and a first driving member. A plurality of conveying rollers 21 are provided and arranged at equal intervals. Both ends of the conveying rollers 21 are rotatably connected to the side wall of the housing 1. The first driving member includes a motor, a sprocket, and a transmission chain. The first driving member is in transmission connection with the conveying rollers 21. Therefore, the first driving member drives the conveying rollers 21 to operate, and the conveying rollers 21 can drive the stator punching sheets 17 on the top surface to move, so as to convey the stator punching sheets 17 to the painting station.

[0054] The discharging component 3 includes a rotating rod 31 and a second driving member. The rotating rod 31 is parallel to the conveying rollers 21. A plurality of rotating rods 31 are provided and arranged at equal intervals. Both ends of the rotating rods 31 are rotatably connected to the side wall of the housing 1. A toothed roller 311 is coaxially and fixedly connected to each rotating rod 31. A plurality of toothed rollers 311 are provided and arranged at equal intervals along the length direction of the rotating rod 31. The toothed roller 311 is a circular sheet structure with a toothed structure. The second driving member includes a motor, a sprocket, and a transmission chain. The second driving member is in transmission connection with the rotating rod 31. Therefore, the second driving member drives the rotating rod 31 to rotate, so that the toothed roller 311 can rotate. The toothed roller 311 can drive the stator punching sheets 17 on the top surface to move, so as to convey the painted stator punching sheets 17 to the subsequent baking device.

[0055] Furthermore, a water tank 14 is fixedly connected to the housing 1. The number of water tanks 14 is the same as the number of rotating rods 31. Each water tank 14 corresponds to a rotating rod 31. The water tank 14 is located below the corresponding rotating rod 31. Water is contained in the water tank 14. The bottom end of the toothed roller 311 is immersed in the water in the water tank 14. Therefore, as the toothed roller 311 rotates, the water-soluble paint adhered to the toothed roller 311 can dissolve into the water in the water tank 14, so as to clean the toothed roller 311 and avoid the paint attached to the toothed roller 311 from having an adverse effect on the painted stator punching sheets 17.

[0056] Referring to Figure 2 , the painting mechanism 4 includes a painting roller 41, a paint leveling roller 42, and a scraper 43. The painting roller 41 is a rubber roller, and the paint leveling roller 42 is a stainless steel roller. The elasticity of the rubber roller enables it to better adapt to the unevenness of the surface of the stator punching sheet 17. Even if the fluidity of the paint is poor, more uniform coating can be achieved through the deformation of the roller body and the pressure distribution. Two painting rollers 41 are provided and arranged vertically; both ends of the painting rollers 41 are rotatably connected to the side wall of the housing 1. After the stator punching sheet 17 passes between the two painting rollers 41, the paint film on the painting rollers 41 can be transferred to the upper and lower sides of the stator punching sheet 17.

[0057] There are two leveling rollers 42, and each leveling roller 42 corresponds to a painting roller 41. The leveling rollers 42 are arranged at intervals on one side of the painting roller 41, and both ends of the leveling roller 42 are rotatably connected to the side wall of the housing 1. The leveling roller 42 and the corresponding painting roller 41 rotate in the same direction. Therefore, the linear velocity directions at the edges of the mutually approaching sides of the leveling roller 42 and the painting roller 41 are opposite. When the leveling roller 42 rotates, the excess paint on the painting roller 41 can be scraped off, so that a paint film with a specific thickness is formed on the painting roller 41. Subsequently, applying this paint film to the stator punching 17 can ensure the uniformity of painting.

[0058] There are four scrapers 43, and each painting roller 41 and each leveling roller 42 correspond to a scraper 43. Both ends of the scraper 43 are rotatably connected to the side wall of the housing 1. Under normal conditions, the tip of the scraper 43 abuts against the corresponding painting roller 41 or leveling roller 42. Therefore, the scraper 43 can scrape off the excess paint on the painting roller 41 or leveling roller 42, and the scraped paint falls from both ends of the scraper 43 along the length direction of the scraper 43. A motor for driving the rotation of the scraper 43 is provided on the housing 1. In the standby state, the painting roller 41 and the leveling roller 42 are both arranged at intervals from the scraper 43. At this time, the painting roller 41 and the leveling roller 42 keep rotating. Therefore, the paint on the surfaces of the painting roller 41 and the leveling roller 42 is in a moving state, and the paint is not easy to solidify. Moreover, the wear of the scraper 43 on the painting roller 41 and the leveling roller 42 can be reduced in the standby state, thus ensuring the service life of the equipment.

[0059] A reduction motor for driving the rotation of the painting roller 41 and the leveling roller 42 is provided on the housing 1. Therefore, the rotation speed of each painting roller 41 and leveling roller 42 can be adjusted as needed; by adjusting the rotational speed difference between the leveling roller 42 and the painting roller 41, the thickness of the paint film on the surface of the painting roller 41 can be adjusted. The greater the rotational speed difference, the thinner the paint film formed on the painting roller 41.

[0060] Among them, the housing 1 includes an upper housing and a lower housing, and the upper housing is vertically slidably connected to the lower housing. The upper painting roller 41 and the leveling roller 42 are both rotatably connected to the upper housing, and the corresponding reduction motor is also provided on the upper housing; a cylinder is provided on the lower housing. The cylinder is vertically arranged, and the end of the piston rod of the cylinder is fixedly connected to the upper housing. Therefore, the upper painting roller 41 and the leveling roller 42 can be driven by the cylinder to move up a certain distance, and at this time, the equipment is idling and in the standby state.

[0061] A receiving tray 15 is also fixedly connected to the housing 1. The painting mechanism 4 is located above the receiving tray 15. Therefore, the excess paint can fall into the receiving tray 15, thus avoiding waste of paint.

[0062] Refer to Figure 3 and Figure 4, there are two sets of paint feeding mechanisms 5, which respectively correspond to the upper and lower paint rollers 41. Taking the paint feeding mechanism 5 corresponding to the upper paint roller 41 as an example for description, the paint feeding mechanism 5 includes a paint storage tank 51, a pump body, a paint feeding pipe 52 and a connecting pipe 53. The paint storage tank 51 is fixedly connected to the housing 1, and the paint storage tank 51 is filled with paint; the pump body is fixedly connected to the paint storage tank 51, the input end of the pump body is communicated with the inside of the paint storage tank 51, and the output end of the pump body is connected to the paint feeding pipe 52. One end of the paint feeding pipe 52 far from the pump body extends to the gap between the paint roller 41 and the paint leveling roller 42. The connecting pipe 53 is fixedly connected to the end of the paint feeding pipe 52, and the connecting pipe 53 is arranged along the axis direction of the paint roller 41. Both ends of the connecting pipe 53 are closed, and the connecting pipe 53 is communicated with the paint feeding pipe 52; a plurality of drain pipes 531 are uniformly arranged at intervals along the length direction of the connecting pipe 53, and the openings of the drain pipes 531 face the gap between the paint roller 41 and the paint leveling roller 42. Therefore, after the pump body is started, the paint in the paint storage tank 51 can flow into the connecting pipe 53 through the paint feeding pipe 52, and then be discharged through the drain pipes 531. Since there are a plurality of drain pipes 531, the paint can flow into the gap between the paint roller 41 and the paint leveling roller 42 more uniformly, which helps to ensure the uniformity of the paint film on the paint roller 41.

[0063] Referring to Figure 4 , Figure 5 and Figure 6 , an exhaust mechanism 6 is also provided in the housing 1. There are two sets of exhaust mechanisms 6, which respectively correspond to the upper and lower paint rollers 41. Taking the exhaust mechanism 6 corresponding to the upper paint roller 41 as an example for description, the exhaust mechanism 6 includes a fan 63, a heating element 64, a first branch pipe 61 and a second branch pipe 62. The first branch pipe 61 is arranged in a T shape and is fixedly connected to the housing 1; the first branch pipe 61 includes a horizontal pipe 611 and a vertical pipe 612, the vertical pipe 612 is vertically fixedly connected to the middle of the horizontal pipe 611, and the vertical pipe 612 and the horizontal pipe 611 are internally communicated. The vertical pipe 612 is coaxially sleeved outside the paint feeding pipe 52, and the horizontal pipe 611 is coaxially sleeved outside the connecting pipe 53. A cavity is formed between the inner wall of the vertical pipe 612 and the outer wall of the paint feeding pipe 52 and between the inner wall of the horizontal pipe 611 and the outer wall of the connecting pipe 53. A first exhaust pipe 6111 is fixedly connected to the horizontal pipe 611, and a plurality of first exhaust pipes 6111 are arranged at intervals along the length direction of the horizontal pipe 611. The opening of the first exhaust pipe 6111 faces the gap between the paint roller 41 and the paint leveling roller 42. Therefore, the paint at the gap between the paint roller 41 and the paint leveling roller 42 can be blown through the first exhaust pipe 6111, so that the paint flows along the axis direction of the paint roller 41, thereby further improving the uniformity of the paint.

[0064] Referring to Figure 3 , there are two second branch pipes 62, which respectively correspond to the two scrapers 43. Referring to Figure 7 andFigure 8 The second branch pipe 62 is arranged along the axial direction of the painting roller 41. A second exhaust pipe 621 is fixedly connected to the second branch pipe 62. There are multiple second exhaust pipes 621, which are evenly spaced along the length direction of the second branch pipe 62. The openings of the second exhaust pipes 621 face the doctor blade 43. Therefore, the doctor blade 43 can be blown by the second exhaust pipes 621, so that the paint between the doctor blade 43 and the painting roller 41 can flow to both ends of the doctor blade 43 faster, and then flow down from the end of the doctor blade 43 into the receiving tray 15, thus avoiding the accumulation and adhesion of the paint at the doctor blade 43 and affecting the scraping effect of the doctor blade 43. Further, the second exhaust pipes 621 are inclined, the inclination directions of the second exhaust pipes 621 at both ends of the second branch pipe 62 are opposite, and the openings of the second exhaust pipes 621 at both ends of the second branch pipe 62 face away from each other; thus, the paint at the doctor blade 43 can be blown to both ends faster.

[0065] Refer to Figure 4 The blower 63 is fixedly connected to the housing 1. An air inlet pipe 13 is arranged on the vertical pipe 612. The air outlet side of the blower 63 is communicated with the air inlet pipe 13; the heating element 64 is a heating wire, and the heating wire is arranged on the air outlet side of the blower 63. Therefore, the air blown out by the blower 63 can flow into the vertical pipe 612 and the horizontal pipe 611 after being heated by the heating wire, and then a part of the air is discharged through the first exhaust pipe 6111 on the horizontal pipe 611. Both second branch pipes 62 are communicated with the horizontal pipe 611. Therefore, another part of the air in the horizontal pipe 611 can flow into the second branch pipes 62 and then be discharged through the second exhaust pipes 621 on the second branch pipes 62. Since the conveyed air is hot air, the hot air in the first branch pipe 61 can heat up the paint in the paint inlet pipe 52 and the connecting pipe 53, thereby improving the fluidity of the paint, making the paint flow more smoothly and not easily blocked.

[0066] Although the hot air can improve the fluidity of the paint, it will also increase the curing speed of the paint. The hot air discharged through the first exhaust pipe 6111 blows the paint at the gap between the painting roller 41 and the paint leveling roller 42. After the paint here adheres to the painting roller 41 and the paint leveling roller 42, it will be subsequently applied to the stator punching 17 or scraped off by the doctor blade 43. Therefore, the hot air is not likely to cause the paint on the painting roller 41 and the paint leveling roller 42 to cure; and the second exhaust pipes 621 continuously blow hot air to the doctor blade 43, which will cause the temperature of the doctor blade 43 to rise and easily accelerate the curing of the paint near the surface of the doctor blade 43. In order to weaken this influence, the hot air flowing from the horizontal pipe 611 into the second branch pipes 62 can be cooled.

[0067] Refer to Figure 2 and Figure 4, cavities are provided inside the two conveying rollers 21 on the side close to the painting roller 41. One of the conveying rollers 21 is aligned with the exhaust mechanism 6 above, and the other conveying roller 21 corresponds to the exhaust mechanism 6 below. Rotary joints 211 are provided at both ends of the conveying roller 21, and the rotary joints 211 are rotatably connected to the conveying roller 21. One of the rotary joints 211 is internally connected to the horizontal pipe 611, and the other rotary joint 211 is internally connected to the second branch pipe 62. Therefore, a part of the hot air in the horizontal pipe 611 is discharged through the first exhaust pipe 6111, and the other part of the hot air first flows into the cavity inside the conveying roller 21 to heat up the conveying roller 21. Then, the air in the conveying roller 21 flows into the second branch pipe 62 and is discharged through the second exhaust pipe 621. Therefore, during the process of this part of the air flowing through the conveying roller 21, part of the heat will be transferred to the conveying roller 21, thereby reducing the temperature of the hot air and preventing the paint from curing too fast due to the excessive temperature of the scraper 43. After the conveying roller 21 is heated up, the stator punching 17 can be preheated through the conveying roller 21, thereby reducing the temperature difference between the stator punching 17 and the paint and helping to ensure the bonding strength between the paint and the stator punching 17.

[0068] Furthermore, a coil pipe can be provided between the conveying roller 21 and the second branch pipe 62, and heat dissipation fins are provided on the outer side of the coil pipe, so as to further enhance the cooling effect on the hot air in the conveying roller 21 and reduce the temperature rise of the scraper 43.

[0069] To facilitate the cleaning of the paint on the painting roller 41 and the leveling roller 42 after painting, a water inlet pipe 7 is also fixedly connected to the paint inlet pipe 52. A water tank 16 is provided on one side of the housing 1. The water inlet pipe 7 is connected to the water tank 16, and a valve body 71 is provided on the water inlet pipe 7. A water pump is provided on the water tank 16. The water inlet end of the water pump is internally connected to the water tank 16, and the water outlet end of the water pump is connected to the water inlet pipe 7. Therefore, after the valve body 71 is opened and the water pump is started, the water or cleaning liquid in the water tank 16 can flow into the paint inlet pipe 52 through the water inlet pipe 7. The water in the paint inlet pipe 52 then flows into the connecting pipe 53 and is discharged through the drain pipe 531, thereby spraying the gap between the painting roller 41 and the leveling roller 42. At this time, both the painting roller 41 and the leveling roller 42 are in a continuous rotating state, so the paint on the painting roller 41 and the leveling roller 42 can be washed away to prevent the paint from curing and affecting subsequent use.

[0070] Refer to Figure 9, Further, one end of the connecting pipe 53 is provided with an installation hole 532, and a blocking block 8 is slidably arranged in the installation hole 532 along its own axis direction. The blocking block 8 is frustum-shaped, and the inner wall of the installation hole 532 is a conical surface adapted to the blocking block 8. A limiting rod 533 is fixedly connected to the outer wall of one end of the connecting pipe 53. A connecting block 81 is fixedly connected to the blocking block 8. A through hole for the limiting rod 533 to pass through is provided on the connecting block 81, and the connecting block 81 is slidably penetrated through the limiting rod 533. A spring 9 is fixedly connected between the end of the connecting block 81 and the limiting rod 533. The spring 9 makes the blocking block 8 tightly press against the inner wall of the installation hole 532 to block the installation hole 532. When the water pressure inside the connecting pipe 53 increases, the blocking block 8 can be made to slide outward of the installation hole 532. At this time, the installation hole 532 is opened, so that the water in the connecting pipe 53 can flow into the horizontal pipe 611 through the installation hole 532.

[0071] Referring to Figure 4 , a water delivery pipe 10 is also connected between the horizontal pipe 611 and the second branch pipe 62. One end of the water delivery pipe 10 close to the horizontal pipe 611 is provided with a three-way valve 11. The three-way valve 11 is provided with one inlet and two outlets. The inlet of the three-way valve 11 is communicated with the inside of the horizontal pipe 611. One of the outlets of the three-way valve 11 is communicated with the rotary joint 211 at the end of the conveying roller 21, and the other outlet of the three-way valve 11 is communicated with the water delivery pipe 10. Therefore, during the painting process, the three-way valve 11 makes the horizontal pipe 611 communicate with the rotary joint 211, and hot air can be introduced into the conveying roller 21 for heat exchange. When cleaning is required after painting is completed, the three-way valve 11 makes the horizontal pipe 611 communicate with the water delivery pipe 10. At this time, after the water in the connecting pipe 53 flows into the horizontal pipe 611 through the installation hole 532, the water in the horizontal pipe 611 can flow into the second branch pipe 62 through the water delivery pipe 10, and then be discharged through the second exhaust pipe 621, so as to wash the scraper 43 and realize the cleaning of the scraper 43.

[0072] Further, a one-way valve 12 is connected to the rotary joint 211 on the side close to the second branch pipe 62. The flow direction of the fluid in the one-way valve 12 is from the conveying roller 21 to the second branch pipe 62, so as to prevent the water in the water delivery pipe 10 from flowing into the cavity inside the conveying roller 21. A one-way valve 12 is also provided on the side of the vertical pipe 612 close to the blower 63. The flow direction of the fluid in the one-way valve 12 is from the blower 63 to the vertical pipe 612, so as to prevent the water in the vertical pipe 612 from flowing back into the blower 63.

[0073] The implementation principle of a paint coating device for a generator stator punching sheet in this application embodiment is as follows: The paint flows into the connecting pipe 53 through the paint inlet pipe 52, and then is discharged outward through the drain pipe 531. The falling paint flows between the paint coating roller 41 and the paint leveling roller 42. As the paint coating roller 41 and the paint leveling roller 42 rotate, the paint can be evenly coated on the paint coating roller 41 to form a paint film on the paint coating roller 41.

[0074] The stator punching sheet 17 to be painted is placed on the top surface of the conveying roller 21, and the operation of the conveying roller 21 drives the stator punching sheet 17 to move horizontally. When the stator punching sheet 17 passes between the two painting rollers 41, the paint film on the painting rollers 41 is applied to the stator punching sheet 17. The painted stator punching sheet 17 is conveyed to the baking device by the rotating toothed roller 311.

[0075] During the continuous discharge of the paint, hot air is continuously introduced into the first branch pipe 61, so that the paint in the paint inlet pipe 52 and the connecting pipe 53 is heated to increase the fluidity of the paint; a part of the hot air in the first branch pipe 61 is discharged through the first exhaust pipe 6111 to blow the paint between the painting roller 41 and the paint leveling roller 42, so that the paint is more evenly distributed on the painting roller 41; another part of the hot air in the first branch pipe 61 flows into the cavity inside the conveying roller 21, and then flows into the second branch pipe 62, and then is discharged through the second exhaust pipe 621 on the second branch pipe 62 to blow the paint at the scraper 43, accelerating the flow of the paint at the gap between the scraper 43 and the painting roller 41 to both ends, thereby reducing the paint accumulated at the scraper 43.

[0076] After the painting process is completed, the state of the three-way valve 11 is adjusted so that the horizontal pipe 611 is communicated with the water delivery pipe 10. At this time, the valve body 71 is opened, and clean water is conveyed into the paint inlet pipe 52 through the water inlet pipe 7, and the clean water is discharged through the drain pipe 531 on the connecting pipe 53 to spray the rotating painting roller 41 and the paint leveling roller 42, and the paint on the painting roller 41 and the paint leveling roller 42 can be washed off; at the same time, due to the relatively high water pressure in the connecting pipe 53, the block 8 can be made to slide outwards, the mounting hole 532 is opened, and the clean water in the connecting pipe 53 flows into the horizontal pipe 611 through the mounting hole 532, and then flows into the second branch pipe 62 through the water delivery pipe 10, and then is discharged through the second exhaust pipe 621 on the second branch pipe 62, thereby spraying the scraper 43 and washing off the paint on the scraper 43.

[0077] After the cleaning process is completed, the conveyance of clean water is stopped, and the block 8 abuts against the inner wall of the mounting hole 532 under the action of the spring 9. The valve body 71 is closed, and the state of the three-way valve 11 is adjusted so that the horizontal pipe 611 is communicated with the rotary joint 211 at the end of the conveying roller 21.

[0078] This embodiment also discloses a process, including the following steps:

[0079] Step a. The pump body conveys the paint to the connecting pipe 53, and the paint in the connecting pipe 53 is discharged through the drain pipe 531 and falls to the gap between the painting roller 41 and the paint leveling roller 42.

[0080] Step b. Hot air is introduced into the first branch pipe 61 to heat up the paint in the paint inlet pipe 52 and the connecting pipe 53 and improve the fluidity of the paint.

[0081] Step c. The hot air in the first branch pipe 61 is discharged through the first exhaust pipe 6111 to blow the paint between the paint roller 41 and the paint leveling roller 42, making the paint distribution more uniform.

[0082] Step d. The paint roller 41 and the paint leveling roller 42 rotate in the same direction. The paint leveling roller 42 scrapes off the excess paint on the paint roller 41, forming a paint film on the surface of the paint roller 41. The scraped paint adheres to the paint leveling roller 42 and is then scraped off by the scraper 43.

[0083] Step e. The feeding assembly 2 feeds the stator punching 17 between the two paint rollers 41.

[0084] Step f. The two paint rollers 41 rotate in opposite directions. The paint film on the surface of the upper paint roller 41 is coated on the upper surface of the stator punching 17, and the paint film on the surface of the lower paint roller 41 is coated on the lower surface of the stator punching 17.

[0085] Step g. The scraper 43 scrapes off the paint on the paint roller 41.

[0086] Step h. The hot air in the first branch pipe 61 flows into the conveying roller 21, cools down and then flows into the second branch pipe 62, and is then discharged through the second exhaust pipe 621, accelerating the flow of the paint between the scraper 43 and the paint roller 41 towards both ends.

[0087] Step i. The discharging assembly 3 conveys the stator punching 17 to the next process.

[0088] The above are optional embodiments of the present application, and do not limit the protection scope of the present application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. A generator stator punching and painting equipment, characterized in that: include: A housing (1) and a conveying mechanism arranged on the housing (1), comprising a feeding assembly (2) and a discharging assembly (3) for conveying stator punching sheets (17); A paint coating mechanism (4), comprising a paint coating roller (41), a paint leveling roller (42) and a scraper (43), wherein the paint coating roller (41) is a rubber roller, the paint leveling roller (42) is a stainless steel roller, two of each of the paint coating roller (41) and the paint leveling roller (42) are provided, and the scraper (43) is pressed against the paint coating roller (41) and the paint leveling roller (42); A paint feeding mechanism (5) comprising a paint storage box (51), a pump body, a paint feeding pipe (52) and a connecting pipe (53) which are connected in sequence, wherein the connecting pipe (53) is arranged along the axial direction of the paint roller (41), and a plurality of drainage pipes (531) are arranged on the connecting pipe (53), and the openings of the drainage pipes (531) face the gap between the paint roller (41) and the paint leveling roller (42); The exhaust mechanism (6) comprises a fan (63), a heating element (64), a first branch pipe (61) and a second branch pipe (62), wherein the first branch pipe (61) is sleeved on the outside of the connecting pipe (53), a cavity is provided between the first branch pipe (61) and the connecting pipe (53), a first exhaust pipe (6111) is provided on the first branch pipe (61), an opening of the first exhaust pipe (6111) faces a gap between the paint roller (41) and the paint leveling roller (42), and the second branch pipe (62) The second branch pipe (62) is arranged along the length direction of the scraper (43), and a second exhaust pipe (621) is arranged on the second branch pipe (62). The opening of the second exhaust pipe (621) faces the gap between the scraper (43) and the paint roller (41). The fan (63), the first branch pipe (61) and the second branch pipe (62) are connected in sequence. The heating element (64) is arranged on the air outlet side of the fan (63), so that the fan (63) discharges hot air to the outside through the first exhaust pipe (6111) and the second exhaust pipe (621).

2. The generator stator punching and painting equipment according to claim 1 is characterized in that: A plurality of second exhaust pipes (621) are provided, and the second exhaust pipes (621) are arranged at intervals along the length direction of the second branch pipe (62). The second exhaust pipes (621) are arranged obliquely, and the opening directions of the second exhaust pipes (621) at both ends of the second branch pipe (62) are oriented toward sides away from each other.

3. The generator stator punching and painting equipment according to claim 1 is characterized in that: The feeding assembly (2) comprises a conveying roller (21) and a first driving member, wherein a cavity is provided inside the conveying roller (21), and both ends of the conveying roller (21) are rotatably connected to rotary joints (211), wherein one of the rotary joints (211) is connected to the inside of a first branch pipe (61), and the other rotary joint (211) is connected to the inside of a second branch pipe (62), and the first driving member is used to drive the conveying roller (21) to rotate.

4. The generator stator punching and painting equipment according to claim 3 is characterized by: The paint inlet pipe (52) is provided with a water inlet pipe (7), the water inlet pipe (7) is connected to a water source, and a valve body (71) is provided on the water inlet pipe (7).

5. The generator stator punching sheet painting equipment according to claim 4 is characterized in that: The connecting pipe (53) is provided with a mounting hole (532), a stopper (8) is slidably provided in the mounting hole (532), a spring (9) is connected between the stopper (8) and the connecting pipe (53), the spring (9) causes the stopper (8) to press against the inner wall of the mounting hole (532), a water pipe (10) is provided between the first branch pipe (61) and the second branch pipe (62), a three-way valve (11) is provided between the first branch pipe (61) and the water pipe (10), and the three-way valve (11) is respectively connected to the first branch pipe (61), the water pipe (10) and a rotary joint (211) close to one end of the first branch pipe (61).

6. The generator stator punching sheet painting equipment according to claim 5, characterized in that: A one-way valve (12) is connected to the rotary joint (211) on the side close to the second branch pipe (62).

7. The generator stator punching sheet painting equipment according to claim 1 is characterized by: The discharging assembly (3) comprises a rotating rod (31) and a second driving member, wherein the rotating rod (31) is rotatably connected to the housing (1), a plurality of toothed rollers (311) are coaxially arranged on the rotating rod (31), the top side of the toothed rollers (311) is used to receive the bottom wall of the stator punching sheet (17), and the second driving member is used to drive the rotating rod (31) to rotate.

8. The generator stator punching sheet painting equipment according to claim 7 is characterized by: A water tank (14) is provided on the housing (1) below the rotating rod (31), and the toothed roller (311) is located in the water tank (14).

9. The generator stator punching sheet painting equipment according to claim 1, characterized in that: The housing (1) is provided with a receiving pan (15) for receiving fallen paint.

10. A process for applying the generator stator punching and painting equipment according to any one of claims 1 to 9, characterized in that: The process comprises the following steps: a. The pump body transports the paint to the connecting pipe (53), and the paint in the connecting pipe (53) is discharged through the discharge pipe (531) and falls into the gap between the paint roller (41) and the paint leveling roller (42); b. The paint roller (41) and the paint leveling roller (42) rotate in the same direction, and the paint leveling roller (42) scrapes off the excess paint on the paint roller (41), so that a paint film is formed on the surface of the paint roller (41), and the scraped paint adheres to the paint leveling roller (42) and is then scraped off by the scraper (43); c. The feeding assembly (2) feeds the stator punching sheet (17) between two paint rollers (41); d. The two paint rollers (41) rotate in opposite directions, the paint film on the surface of the upper paint roller (41) is applied to the upper surface of the stator punching sheet (17), and the paint film on the surface of the lower paint roller (41) is applied to the lower surface of the stator punching sheet (17); e. scraping the paint on the paint roller (41) with a scraper (43); f. The discharging assembly (3) transports the stator punching sheet (17) to the next process.

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