A steel sheet powder spraying system

Abstract

The present application relates to the technical field of powder spraying, and discloses a steel coil and steel plate powder spraying system, which comprises a powder room, the powder room is provided with a passing gap, and a hanging rail is arranged at the upper portion of the passing gap; a moving carrier is arranged on the hanging rail, and the moving carrier is connected with a steel plate to be sprayed through a hanging bracket; a powder spraying device is arranged on the side of the powder room; a powder collecting bin is arranged at the lower portion of the powder room, the powder collecting bin is connected with a cyclone separator through a first powder conveying pipe; the air outlet end of the cyclone separator is connected with a bag-type dust collector through a second powder conveying pipe, and the discharge end of the bag-type dust collector is connected with a first powder collecting barrel; the discharge end of the cyclone separator is connected with a second powder collecting barrel, a fan is arranged on the second powder collecting barrel, the fan is connected with a powder screening machine through a third powder conveying pipe, the outlet end of the powder screening machine is connected with a powder supply barrel, and the powder supply barrel supplies powder to the powder spraying device through a fourth powder conveying pipe; the system realizes stable movement and uniform powder spraying of the steel plate, improves the utilization rate of the powder, reduces waste, discharges up to standard, ensures continuous production, reduces maintenance cost and environmental impact.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of powder spraying technology, in particular to a steel coil and steel plate powder spraying system. BACKGROUND

[0002] In the field of steel plate processing, powder spraying treatment is an important process for improving the corrosion resistance and appearance quality of steel plates. Powder coating relies on electrostatic spraying onto the surface of the steel plate, and after heating and melting, a firm coating is formed which is tightly combined with the surface of the steel plate. This coating has excellent corrosion resistance and decorative function. Currently, some existing enterprises use the following method for powder spraying of steel plates: an intermittent conveying line and a dedicated spraying house are arranged at the top of the processing workshop, and a spraying device is arranged in the spraying house. During spraying, a plurality of steel plates to be sprayed are hung on the intermittent conveying line by hooks, and the steel plates are conveyed into the spraying house by the intermittent conveying line, and the steel plates are sprayed by the spraying device. After spraying is completed, the sprayed steel plates are output by the intermittent conveying line.

[0003] However, the existing steel coil and steel plate powder spraying system has technical defects in actual operation: the powder recycling efficiency is low, most systems only collect excess powder through a simple powder collection tank, lack effective grading recovery and screening mechanism, a large amount of powder is wasted, and the powder-containing gas flow generated during the recycling process is not fully filtered, the tail gas directly discharged has excessive powder content, which does not meet the environmental protection requirements. SUMMARY

[0004] The purpose of the present application is to provide a steel coil and steel plate powder spraying system to solve the problem of low powder recycling efficiency raised in the background art.

[0005] The technical solution adopted by the present application is as follows: a steel coil and steel plate powder spraying system, comprising a powder house, the powder house having a passing gap on the top, a suspension rail being installed on the upper part of the passing gap; a mobile carrier being installed on the suspension rail, the mobile carrier being connected with a steel plate to be sprayed through a hanger, the steel plate moving along the passing gap; a powder spraying device being installed on the side of the powder house, the powder spraying devices on the two sides being oppositely arranged, the powder spraying device being used for spraying powder to the steel plate; a powder collection bin being installed at the lower part of the powder house, the powder collection bin being connected with a cyclone separator through a first powder conveying pipe; the air outlet end of the cyclone separator being connected with a bag-type dust collector through a second powder conveying pipe, the discharge end of the bag-type dust collector being connected with a first powder collection barrel; the discharge end of the cyclone separator being connected with a second powder collection barrel, a fan being installed on the second powder collection barrel, the fan being connected with a powder screening machine through a third powder conveying pipe, the outlet end of the powder screening machine being connected with a powder supply barrel, the powder supply barrel supplying powder to the powder spraying device through a fourth powder conveying pipe.

[0006] The powder spraying group comprises a second carrier plate arranged on the support arm, a fourth guide rail arranged in parallel on the second carrier plate, a second sliding seat slidably connected to the fourth guide rail, five second sliding seats, a third carrier plate arranged on the second sliding seat, the third carrier plates having the same spacing, a positioning pin arranged on the middle third carrier plate and fixedly connected to the second carrier plate, a shaft sleeve arranged on the third carrier plate, a shaft rod rotatably connected to the shaft sleeve, and a prismatic telescopic connecting rod hingedly connected to the shaft rod.

[0007] A gun seat is arranged on the third carrier plate for mounting a spray gun.

[0008] A first carrier seat is arranged on the third carrier plate and has a V shape, a second carrier seat is arranged on the first carrier seat and has an inverted U shape, a first suspension is rotatably connected to the top surface of the second carrier seat, the first suspension is driven by a third motor, the first suspension has a U shape, a gun holster is rotatably connected to the notch of the first suspension, and the inner hole of the gun holster is used for mounting a spray gun. A second suspension is rotatably connected to the side surface of the second carrier seat, the second suspension is driven by a fourth motor, the second suspension has a V shape, a third suspension is rotatably connected to the free end of the second suspension, the third suspension has a V shape, and the free end of the third suspension is connected to the gun holster through a ball hinge joint. A second bearing seat is arranged on the second carrier plate, a rotating shaft is rotatably connected to the second bearing seat, the diameters of the two ends of the rotating shaft are smaller than the diameter of the middle section, a driving member is arranged on the rotating shaft to drive the swing arm to swing, a sliding groove is formed in the side wall of the rotating shaft, a sliding block is slidably connected in the sliding groove, a spray gun is arranged on the sliding block, a first spring seat is arranged on the side wall of the spray gun, a first spring is connected to the lower end of the first spring seat, a second spring seat is connected to the lower end of the first spring, and the second spring seat is connected to the third carrier plate.

[0009] A swing arm is arranged on the rotating shaft and protrudes from both ends thereof. The driving member comprises a third bearing seat arranged on the pad, two third bearing seats are symmetrically arranged, a light shaft is rotatably connected to the third bearing seat, one end of the light shaft is connected to a cam, the eccentric surfaces of the two cams are opposite, the cam is rollingly connected to the swing arm, the other end of the light shaft is connected to a first gear, a second gear is meshed with the first gear, and the second gear is driven by a fifth motor.

[0010] A third gear is arranged on the rotating shaft. The driving member comprises a support frame arranged on the pad, a sector gear is rotatably connected to the support frame, the sector gear is meshed with the third gear, a strip is connected to the sector gear, a limiting groove is arranged on the strip, a rotating rod is slidably connected in the limiting groove, an eccentric rod is connected to the rotating rod, and the eccentric rod is driven by a sixth motor.

[0011] The beneficial effects of the present application are that: the steel coil steel plate powder spraying system cooperates with the moving carrier through the hanging rail on the upper part of the powder room gap, one group of two moving carriers drives the stable movement of the steel plate, combined with the powder spraying devices arranged on both sides, can realize uniform powder spraying of the steel plate; the powder spraying device can adjust the height of the supporting arm through the screw, worm and gear mechanism and the third guide rail, and the powder spraying group can also adjust the distance and angle of the spray gun through the prismatic telescopic connecting rod, telescopic rod or suspension structure, adapt to steel plates of different sizes and surface forms, improve the flexibility and precision of powder spraying, and the design of the high-pressure module, electrode needle and cleaning pipe of the spray gun not only enhances the powder adsorption force but also avoids blockage; the powder collecting bin at the lower part of the powder room adopts V-shaped and inverted V-shaped bending plates to form a pentagonal powder collecting cavity, cooperates with the air disc, inflatable box and filter cloth, effectively prevents powder accumulation and improves the collection efficiency, and after two-stage recovery through the cyclone separator and bag-type dust collector, combined with the powder screening machine, the powder bucket is recycled, greatly improves the powder utilization rate, reduces waste, and at the same time, the bag-type dust collector ensures that the discharged air meets the standard, meets the environmental protection requirements, and the overall system components work together to ensure the quality of powder spraying and production continuity, and reduce maintenance cost and environmental impact. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a front view structural schematic diagram of the present application.

[0013] Figure 2 It is a perspective structural schematic diagram of the present application.

[0014] Figure 3 It is a perspective structural schematic diagram of the powder room.

[0015] Figure 4 It is a perspective structural schematic diagram of the bottom plate.

[0016] Figure 5 It is a side view cross-sectional structural schematic diagram of the top cover.

[0017] Figure 6 It is a front view cross-sectional structural schematic diagram of the hanging rail.

[0018] Figure 7 It is a front view structural schematic diagram of the moving carrier.

[0019] Figure 8 It is a perspective structural schematic diagram of the hanging bracket.

[0020] Figure 9 It is a side view structural schematic diagram of the hanging rod.

[0021] Figure 10 It is a perspective structural schematic diagram of the hanging rod.

[0022] Figure 11 It is a top view structural schematic diagram of the stand column.

[0023] Figure 12A perspective view of a column.

[0024] Figure 13 A perspective view of a bellows.

[0025] Figure 14 A perspective view of a powder spraying device.

[0026] Figure 15 A front view of a spray gun.

[0027] Figure 16 A front view of a powder collecting bin.

[0028] Figure 17 A perspective view of a first bending plate.

[0029] Figure 18 A perspective view of a powder suction pipe.

[0030] Figure 19 A front view of a gas disc.

[0031] Figure 20 A front view of an air charging box.

[0032] Figure 21 A perspective view of a filter cloth.

[0033] Figure 22 A perspective view of a second carrier plate and a third carrier plate.

[0034] Figure 23 A perspective view of a first carrier seat and a second carrier seat.

[0035] Figure 24 A side view of a first suspension.

[0036] Figure 25 A perspective view of a second suspension.

[0037] Figure 26 A perspective view of a rotating shaft.

[0038] Figure 27 A perspective view of a first gear.

[0039] Figure 28 A perspective view of a strip plate.

[0040] Figure 29 A perspective view of a rotating rod.

[0041] In the figure: 1, powder room; 2, walking gap; 3, hanging rail; 4, moving carrier; 5, hanging bracket; 6, steel plate; 7, powder spraying device; 8, powder collecting bin; 9, first powder feeding pipe; 10, cyclone separator; 11, second powder feeding pipe; 12, bag dust collector; 13, first powder collecting barrel; 14, second powder collecting barrel; 15, fan; 16, third powder feeding pipe; 17, powder screening machine; 18, powder supply barrel; 19, fourth powder feeding pipe; 20, supporting leg; 21, base frame; 22, bottom plate; 23, box plate; 24, top plate; 25, supporting plate; 26, top cover; 27, lifting gap; 28, first guide rail; 29, second guide rail; 30, roller; 31, wheel seat; 32, first carrier plate; 33, double-end bolt; 34, first cloth belt hook; 35, first bearing seat; 36, driving gear; 37, first motor; 38, rack; 39, first lifting hook; 40, lifting rod; 41, lifting lug; 42, second lifting hook; 43, second cloth belt hook; 44, magnet; 45, stand; 46, third guide rail; 47, first sliding seat; 48, sliding table; 49, guide sleeve; 50, groove; 51, lead screw; 52, worm gear mechanism; 53, second motor; 54, supporting arm; 55, bellows; 56, powder spraying group; 57, ear seat; 58, buckle cover; 59, supporting rod; 60, pipe seat; 61, spray gun; 62, gun barrel; 63, high-pressure module; 64, positioning pipe; 65, electrode needle; 66, powder conveying pipe; 67, three-way pipe; 68, cleaning pipe; 69, locking sleeve; 70, first bending plate; 71, second bending plate; 72, powder collecting cavity; 73, through groove; 74, powder suction pipe; 75, air disc; 76, air charging box; 77, air hole; 78, pressing strip; 79, filter cloth; 80, air injection pipe; 81, air equalizing groove; 82, second carrier plate; 83, fourth guide rail; 84, second sliding seat; 85, third carrier plate; 86, positioning pin; 87, shaft sleeve; 88, shaft rod; 89, prismatic telescopic connecting rod; 90, telescopic rod; 91, gun seat; 92, first carrier seat; 93, second carrier seat; 94, first suspension; 95, third motor; 96, gun sleeve; 97, second suspension; 98, fourth motor; 99, third suspension; 100, backing plate; 101, second bearing seat; 102, rotating shaft; 103, driving piece; 104, swing arm; 105, sliding groove; 106, sliding block; 107, first spring seat; 108, first spring; 109, second spring seat; 110, third bearing seat; 111, optical axis; 112, cam; 113, first gear; 114, second gear; 115, fifth motor; 116, third gear; 117, supporting frame; 118, sector gear; 119, strip plate; 120, limiting groove; 121, rotating rod; 122, eccentric rod; 123, sixth motor. DETAILED DESCRIPTION

[0042] Embodiments of the present application are described below in detail with reference to the accompanying drawings, wherein the same or similar components are denoted by the same or similar reference numerals, and examples of the embodiments are shown in the drawings, throughout. The embodiments described below are exemplary only, and are not understood to limit the present application.

[0043] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0044] In addition, the terms "first", "second", "third", "fourth", "fifth", "sixth", "seventh", "eighth", "ninth", "tenth" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; for those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0046] As Figure 1 and Figure 2As shown, embodiment one, a steel plate powder spraying system, comprising a powder room 1, the powder room 1 is provided with a walking gap 2 for the movement of the steel plate 6, the upper part of the walking gap 2 is provided with a hanging rail 3, the length of the hanging rail 3 is determined according to the actual processing requirements of the production plant area and the conveying path of the steel plate 6, for example, it can be set to 5-10 meters (the specific length can be adjusted according to the actual scene); The moving carrier 4 is installed on the hanging rail 3, two moving carriers 4 are a group, the moving carrier 4 is connected with the steel plate 6 to be sprayed through the hanger 5, and the steel plate 6 moves along the walking gap 2; The side of the powder room 1 is provided with a powder spraying device 7, the powder spraying devices 7 on the two sides are oppositely arranged, and the powder spraying device 7 is used for spraying powder to the steel plate 6; The lower part of the powder room 1 is provided with a powder collecting bin 8, the powder collecting bin 8 is connected with a cyclone separator 10 through a first powder conveying pipe 9; The air outlet end of the cyclone separator 10 is connected with a bag dust collector 12 through a second powder conveying pipe 11, the air filtered by the bag dust collector 12 can be discharged, and the discharge end of the bag dust collector 12 is connected with a first powder collecting barrel 13; The discharge end of the cyclone separator 10 is connected with a second powder collecting barrel 14, a fan 15 is installed on the second powder collecting barrel 14, the fan 15 is connected with a powder screening machine 17 through a third powder conveying pipe 16, the outlet end of the powder screening machine 17 is connected with a powder supply barrel 18, and the powder supply barrel 18 supplies powder to the powder spraying device 7 through a fourth powder conveying pipe 19. The cyclone separator 10, the bag dust collector 12, the powder screening machine 17 and the powder supply barrel 18 are purchased in the market. The technical problems that can be solved: the existing steel plate 6 powder spraying system has low powder recycling rate, tail gas emission does not meet the standard, and the powder supply effect of each device is poor. Movement process: the steel plate 6 to be sprayed is connected to the moving carrier 4 on the hanging rail 3 through the hanger 5, two moving carriers 4 are a group to drive the steel plate 6 to move along the walking gap 2 of the powder room 1; The powder spraying devices 7 oppositely arranged on the two sides of the powder room 1 spray powder to the moving steel plate 6; The excess powder generated during the powder spraying process falls into the powder collecting bin 8 at the lower part of the powder room 1, the powder in the powder collecting bin 8 enters the cyclone separator 10 through the first powder conveying pipe 9, part of the powder separated by the cyclone separator 10 falls into the second powder collecting barrel 14, another part of the powder enters the bag dust collector 12 with the airflow through the second powder conveying pipe 11, the powder filtered by the bag dust collector 12 falls into the first powder collecting barrel 13, and the filtered air is discharged; The powder in the second powder collecting barrel 14 is screened into the powder screening machine 17 through the third powder conveying pipe 16 under the action of the fan 15, the screened powder enters the powder supply barrel 18, and the powder supply barrel 18 supplies powder to the powder spraying device 7 through the fourth powder conveying pipe 19. Advantageous effects: the stable movement of the steel plate 6 is realized, the continuous powder spraying process is ensured; The opposite powder spraying on both sides ensures that the steel plate 6 is evenly sprayed; The powder is recycled by two-stage cyclone separator 10 and bag dust collector 12, the powder utilization rate is improved, and the raw material waste is reduced; The air after being filtered by the bag dust collector 12 is discharged, meeting the environmental protection requirements; The powder is supplied by the devices, ensuring that the powder spraying device 7 continuously supplies powder and improving the production efficiency.

[0047] As Figures 3-5As shown, as an optimization of Embodiment 1, the powder booth 1 includes support legs 20, with several support legs 20 symmetrically arranged. A base frame 21 is installed on the support legs 20. A base plate 22 is welded to the bottom surface of the base frame 21, and box plates 23 are welded to the sides of the base frame 21. Passing gaps 2 are left on the front and rear opposite box plates 23. A top plate 24 is welded to the top surface of the base frame 21. Support plates 25, which are equally spaced, are connected to the base frame 21. The support plates 25 are trapezoidal in shape, and their bottom surfaces are connected to the hanging rails 3. A top cover 26 is installed on the base frame 21, and the inner wall of the top cover 26 is connected to the support plates 25. Lifting gaps 27 are left on the left and right opposite box plates 23. The technical problems that can be solved are: poor structural stability of the existing powder booth 1, unstable installation of the hanging rails 3, lack of suitable space for the lifting of the powder spraying device 7, and poor overall sealing and support effect of the powder booth 1. Beneficial effects: The support legs 20 and the base frame 21 work together to improve the overall structural stability of the powder booth 1; the trapezoidal support plate 25 provides a stable installation base for the hanging rail 3 and enhances the connection strength between the top cover 26 and the base frame 21; the setting of the lifting gap 27 provides space for the lifting adjustment of the powder spraying device 7, making it easy to adjust the powder spraying position according to the size of the steel plate 6; the overall welded structure improves the sealing of the powder booth 1 and reduces powder spillage.

[0048] like Figure 6 As shown, as an optimization of Embodiment 1, the hanging rail 3 includes a first guide rail 28 connected to the top cover 26. The first guide rail 28 is inverted U-shaped, and a second guide rail 29 is mounted on the first guide rail 28. The second guide rail 29 is I-shaped. Technical problems solved: The existing hanging rail 3 has insufficient load-bearing capacity, the mobile carrier 4 does not move smoothly on the rail, and the rail structure is easily deformed. Beneficial effects: The inverted U-shaped first guide rail 28 enhances the connection stability with the top cover 26 and improves the overall load-bearing capacity; the I-shaped second guide rail 29 has high structural strength, is not easily deformed, and has good compatibility with the rollers 30, ensuring smooth movement of the mobile carrier 4, reducing jamming, and ensuring stable movement of the steel plate 6.

[0049] like Figure 7As shown, as an optimization of Embodiment 1, the mobile carrier 4 includes a roller 30 that is rotatably connected to the second guide rail 29. A wheel seat 31 is rotatably connected to the roller 30, and a first carrier plate 32 is mounted on the wheel seat 31. Two first carrier plates 32 are connected by double-ended bolts 33, and a first cloth hook 34 is mounted on the double-ended bolts 33. A first bearing seat 35 is mounted on the opposite surface of the first carrier plate 32, and a drive gear 36 is rotatably connected to the first bearing seat 35. The drive gear 36 is driven by a first motor 37. A rack 38 is mounted on the bottom surface of the second guide rail 29, and the rack 38 meshes with the drive gear 36. The technical problems that can be solved are: poor synchronous movement effect of the existing mobile carrier 4, insecure hanging and fixing of the steel plate 6, and uneven movement speed of the steel plate 6 due to unstable driving mode. Movement process: The rollers 30 of the mobile carrier 4 roll on the second guide rail 29; the first motor 37 drives the drive gear 36 to rotate, and the drive gear 36 meshes with the rack 38 on the bottom surface of the second guide rail 29, driving the mobile carrier 4 to move along the second guide rail 29; the first cloth hook 34 is used to connect the hanger 5. Beneficial effects: The double-headed bolts 33 connect the two first carrier plates 32 synchronously, ensuring that the steel plate 6 is subjected to balanced force; the gear and rack 38 meshing drive mode is stable, ensuring that the steel plate 6 moves at a uniform speed and improving the consistency of powder coating; the first cloth hook 34 provides a reliable connection point for the hanger 5, enhancing the hanging stability.

[0050] like Figures 8-10 As shown, as an optimization of Embodiment 1, the hanger 5 includes a first hook 39 that is suspended from a first fabric hook 34. The first hook 39 is S-shaped, and a hanging rod 40 is suspended from the lower end of the first hook 39. The hanging rod 40 is tubular, and a lifting lug 41 is connected to the side wall of the hanging rod 40. Two lifting lugs 41 form a group. The upper lifting lug 41 is adapted to the first hook 39, and the lower lifting lug 41 is suspended from a second hook 42. The second hook 42 is S-shaped, and a second fabric hook 43 is suspended from the lower end of the second hook 42. A magnet 44 is connected to the second fabric hook 43, and the magnet 44 is used to attract the powder-coated steel plate 6. The technical problems that can be solved are: the existing hanger 5 has a complex method of suspending the steel plate 6, is inconvenient to disassemble, has poor adaptability to steel plates 6 of different sizes, and the steel plate 6 is prone to shaking after suspension. Beneficial effects: The S-shaped hook has a simple structure and is easy to disassemble, making it convenient to quickly replace the steel plate 6; the magnet 44 adsorption method does not require complex clamps, is highly adaptable to steel plates 6 of different sizes, and has a firm adsorption, reducing the shaking of the steel plate 6; the lifting rod 40 and the lifting lug 41 work together to improve the overall load-bearing capacity of the hanger 5 and ensure the stability of the steel plate 6 hanging.

[0051] like Figures 11-13As shown, as an optimization of Embodiment 1, the powder spraying device 7 includes a support arm 54 and a powder spraying assembly 56 mounted on the support arm 54. The powder spraying device 7 includes a column 45, with a third guide rail 46 mounted on the side wall of the column 45. The third guide rails 46 are symmetrically arranged, and a first slide block 47 is slidably connected to the third guide rail 46. A slide table 48 is mounted on the first slide block 47, and a guide sleeve 49 is connected to the slide table 48. A groove 50 is formed on the top surface of the column 45, and a lead screw 51 is rotatably connected within the groove 50. The lead screw 51 is adapted to the guide sleeve 49. The lead screw 51 is driven by a worm gear mechanism 52, which is driven by a second motor 53. The support arm 54 is connected to the slide table 48, and the support arm 54 extends into a lifting gap 27. The powder spraying assembly 56 is mounted on the support arm 54. A bellows 55 is installed within the lifting gap 27, and the free end of the bellows 55 is connected to the support arm 54. Technical problems that can be solved: The existing powder spraying device 7 has inconvenient height adjustment, poor sealing of the powder chamber 1 when the support arm 54 moves, and the powder spraying position cannot be flexibly adjusted according to the height of the steel plate 6. Movement process: The second motor 53 drives the worm gear mechanism 52 to operate, and the worm gear mechanism 52 drives the lead screw 51 in the groove 50 on the top surface of the column 45 to rotate; the lead screw 51 is adapted to the guide sleeve 49 on the slide table 48, which drives the slide table 48 to slide up and down along the third guide rail 46 on the side wall of the column 45; the slide table 48 drives the support arm 54 to move up and down, and the support arm 54 extends into the lifting gap 27 to adjust the height of the powder spraying group 56; the bellows 55 in the lifting gap 27 extends and retracts with the movement of the support arm 54 to keep the powder chamber 1 sealed. Beneficial effects: The worm gear mechanism 52 drives the lead screw 51 to achieve stable lifting and lowering of the slide table 48, which facilitates precise adjustment of the height of the powder spraying unit 56 and adapts to the powder spraying requirements of steel plates 6 of different thicknesses; the third guide rail 46 ensures smooth movement of the slide table 48 and improves the accuracy of height adjustment; the bellows 55 effectively seals the lifting gap 27, reduces powder overflow, and improves the sealing of the powder room 1.

[0052] like Figure 14 As shown, as an optimization of Embodiment 1, the powder spraying assembly 56 includes an ear seat 57 mounted on a support arm 54. A cover 58 is bolted to the ear seat 57, and a support rod 59 is clamped and fixed between the cover 58 and the ear seat 57. Equally spaced tube seats 60 are bolted to the support rod 59, and a spray gun 61 is bolted to the tube seats 60. Technical problems solved: In the existing powder spraying assembly 56, the spray gun 61 is inconvenient to install and disassemble; the spacing of the spray guns 61 cannot be adjusted according to the width of the steel plate 6; and the spray gun 61 is not securely fixed, leading to powder spraying deviation. Beneficial effects: The bolted connection method makes the installation and disassembly of the spray gun 61, tube seats 60, and support rod 59 convenient, facilitating maintenance and replacement; the spacing of the spray guns 61 can be flexibly adjusted to adapt to powder spraying of steel plates 6 of different widths, ensuring uniform powder spraying; multiple bolt fixation ensures that the spray gun 61 is securely installed, preventing the spray gun 61 from shifting during powder spraying and improving powder spraying accuracy.

[0053] likeFigure 15 As shown, as an optimization of Embodiment 1, the spray gun 61 includes a barrel 62, a high-voltage module 63 installed inside the barrel 62, a positioning tube 64 installed inside the barrel 62, an electrode needle 65 connected to the positioning tube 64, the electrode needle 65 connected to the high-voltage module 63, a powder conveying tube 66 connected to the positioning tube 64, a three-way tube 67 connected to the end of the powder conveying tube 66, one end of the three-way tube 67 connected to a fourth powder delivery tube 19, and the other end of the three-way tube 67 connected to a cleaning tube 68; a locking sleeve 69 is connected to the head of the barrel 62, and the electrode needle 65 is located inside the locking sleeve 69. The technical problems that can be solved are: poor electrostatic adsorption effect of the existing spray gun 61, easy clogging of powder conveying, inconvenient cleaning, and poor powder spraying quality due to inaccurate positioning of the electrode needle 65. Movement Process: The high-voltage module 63 provides high-voltage electricity to the electrode needle 65 on the positioning tube 64, charging the sprayed powder and enhancing its adhesion to the steel plate 6. The fourth powder delivery tube 19 delivers powder to the powder supply tube 66 through the three-way tube 67. The powder enters the gun barrel 62 through the positioning tube 64 and is sprayed out from the locking sleeve 69. During cleaning, cleaning gas is introduced into the powder supply tube 66 and the gun barrel 62 through the cleaning tube 68 to remove residual powder. The locking sleeve 69 positions and protects the electrode needle 65. Beneficial Effects: The high-voltage module 63 and the electrode needle 65 work together to enhance the powder charging effect, improve powder adhesion, and reduce powder shedding. The three-way tube 67 connects to the cleaning tube 68, facilitating regular cleaning, preventing powder blockage, and ensuring the normal operation of the spray gun 61. The positioning tube 64 and the locking sleeve 69 ensure accurate positioning of the electrode needle 65, improving powder spraying stability and quality.

[0054] like Figures 16-18 As shown, as an optimization of Embodiment 1, the powder collection bin 8 includes a first bent plate 70, which is V-shaped. A second bent plate 71, which is inverted V-shaped, is connected to the first bent plate 70. The first bent plate 70 and the second bent plate 71 form a pentagonal powder collection cavity 72. A through groove 73 for powder passage is opened on the inclined surface of the second bent plate 71. A powder suction pipe 74 is installed inside the powder collection cavity 72, and the port of the powder suction pipe 74 is connected to the first powder delivery pipe 9. Technical problems that can be solved: The existing powder collection bin 8 suffers from incomplete powder collection, easy accumulation of powder in dead corners within the bin, and low powder delivery efficiency. Beneficial effects: The pentagonal powder collection cavity 72 increases the powder collection area and improves collection efficiency; the V-shaped and inverted V-shaped bent plate design reduces powder accumulation within the bin, ensuring that powder fully enters the powder suction pipe 74; the powder suction pipe 74 is directly connected to the first powder delivery pipe 9, improving powder delivery efficiency and reducing powder residue.

[0055] like Figures 19-21As shown, as the optimization of embodiment one, the inclined surface of the first bending plate 70 is provided with an air disc 75; the powder collecting cavity 72 is provided with an air charging box 76, the air charging box 76 is in the shape of a ridge, the inclined surface of the air charging box 76 is provided with uniformly distributed air holes 77, the inclined surface of the air charging box 76 is fixed with a pressing strip 78 by bolts, the pressing strip 78 is connected with the air charging box 76 through a filter cloth 79, the filter cloth 79 can prevent powder from entering the air charging box 76; the air charging box 76 is provided with a gas injection pipe 80, the other end of the gas injection pipe 80 extends out of the powder room 1, the air charging box 76 is provided with a gas equalizing groove 81 covering the gas injection pipe 80, and the air charging box 76 is injected with gas, which can prevent powder from accumulating in the powder collecting bin 8. The technical problems that can be solved are: the existing powder in the powder collecting bin 8 is easy to accumulate on the inclined surface of the bending plate and the surface of the filter cloth 79, which leads to powder conveying blockage and filter cloth 79 damage. Movement process: the air disc 75 is installed on the inclined surface of the first bending plate 70, and the air disc 75 sprays air to prevent powder from accumulating on the inclined surface of the first bending plate 70; the gas injection pipe 80 in the air charging box 76 introduces gas into the air charging box 76, the gas is uniformly distributed through the gas equalizing groove 81 and then sprayed out from the air holes 77 on the inclined surface of the air charging box 76, and then passes through the filter cloth 79 to prevent powder from accumulating on the surface of the filter cloth 79; the filter cloth 79 is fixed on the inclined surface of the air charging box 76 by the pressing strip 78 to avoid displacement of the filter cloth 79 due to air flow impact; the filter cloth 79 prevents powder from entering the air charging box 76 and protects the internal structure of the air charging box 76. Advantageous effects: the air injection structure of the air disc 75 and the air charging box 76 effectively prevents powder accumulation, ensures smooth flow of powder in the powder collecting bin 8, and reduces blockage; the gas equalizing groove 81 uniformly distributes the gas to avoid excessive local airflow that damages the filter cloth 79; the filter cloth 79 is fixed by the pressing strip 78, which prolongs the service life of the filter cloth 79 and reduces maintenance costs.

[0056] As Figure 22As shown, embodiment two, and embodiment one different is, the powder spraying group 56 includes a second carrier plate 82 provided on the support arm 54, the second carrier plate 82 is provided with a fourth guide rail 83 arranged in parallel, the fourth guide rail 83 is slidably connected with a second sliding seat 84, the number of sliding seats in the embodiment is 5, the second sliding seat 84 is provided with a third carrier plate 85, the third carrier plate 85 has the same spacing, the third carrier plate 85 located in the middle is connected with a positioning pin 86, the positioning pin 86 is fixedly connected with the second carrier plate 82; The third carrier plate 85 is provided with a shaft sleeve 87, the shaft sleeve 87 is rotatably connected with a shaft rod 88, the shaft rod 88 is hingedly connected with a prismatic telescopic connecting rod 89; One side of the third carrier plate 85 is connected with a telescopic rod 90, the end of the telescopic rod 90 is connected with the second carrier plate 82. The technical problems that can be solved: the existing powder spraying group 56 has the problems of inconvenient adjustment of the distance between the spray guns 61, inability to quickly and synchronously adjust the position of the spray guns 61 according to the width of the steel plate 6, and poor installation stability of the spray guns 61. Movement process: the second carrier plate 82 is provided with parallel fourth guide rails 83, five second sliding seats 84 slide on the fourth guide rails 83, and the second sliding seats 84 are connected with the third carrier plates 85; The middle third carrier plate 85 is fixed with the second carrier plate 82 through the positioning pin 86 and serves as a reference; The shaft sleeve 87 on the third carrier plate 85 is hingedly connected with the shaft rod 88 to form a prismatic telescopic connecting rod 89; When the telescopic rod 90 is telescoped, the two sides of the third carrier plate 85 are synchronously and equidistantly contracted or expanded along the fourth guide rail 83, and the distance between the adjacent third carrier plates 85 is adjusted; The gun seat 91 on the third carrier plate 85 is provided with the spray gun 61, and the distance between the spray guns 61 is adjusted by moving the third carrier plate 85. Advantageous effects: the prismatic telescopic connecting rod 89 cooperates with the telescopic rod 90 to realize synchronous and equidistant adjustment of the spray guns 61, ensures uniform distance between the spray guns 61 after adjustment, and adapts to powder spraying of steel plates 6 with different widths; The fourth guide rail 83 ensures smooth movement of the third carrier plate 85 and improves adjustment accuracy; The middle third carrier plate 85 is fixed as a reference to avoid overall deviation during adjustment and enhance the installation stability of the spray guns 61.

[0057] As shown in Figure 22 Further, the third carrier plate 85 is provided with a gun seat 91 for mounting the spray gun 61; The telescopic rod 90 synchronously and equidistantly contracts or synchronously and equidistantly expands the third carrier plate 85.

[0058] As shown in Figures 23-25As shown, further, another structure of carrying the spray gun 61, the third carrier plate 85 is installed with the first carrier seat 92, the shape of the first carrier seat 92 is V-shaped, the first carrier seat 92 is installed with the second carrier seat 93, the shape of the second carrier seat 93 is inverted U-shaped, the top surface of the second carrier seat 93 is rotationally connected with the first suspension 94, the first suspension 94 is driven by the third motor 95, the shape of the first suspension 94 is U-shaped, the notch of the first suspension 94 is rotationally connected with the holster 96, the inner hole of the holster 96 is used to install the spray gun 61; the side surface of the second carrier seat 93 is rotationally connected with the second suspension 97, the second suspension 97 is driven by the fourth motor 98, the shape of the second suspension 97 is V-shaped, the free end of the second suspension 97 is rotationally connected with the third suspension 99, the shape of the third suspension 99 is V-shaped, the free end of the third suspension 99 is connected with the holster 96 through the ball hinge joint, the ball hinge joint can be purchased in the market, the ball hinge joint can avoid the structural interference between the third suspension 99 and the holster 96; the spray gun 61 is automatically twisted by the third motor 95 and the fourth motor 98. The technical problems that can be solved: the existing spray powder group 56 cannot automatically twist the spray gun 61, the powder spraying angle is fixed, the powder spraying on the complex surface of the steel plate 6 is uneven, and the adjustment operation of the spray gun 61 is complex. Movement process: the third motor 95 drives the first suspension 94 (U-shaped) on the top surface of the first carrier seat 92 (V-shaped) on the second carrier plate 82 to rotate, the first suspension 94 drives the holster 96 to rotate; the fourth motor 98 drives the second suspension 97 (V-shaped) on the side surface of the second carrier seat 93 (inverted U-shaped) to rotate, the second suspension 97 drives the third suspension 99 (V-shaped) to rotate, the third suspension 99 further drives the holster 96 to rotate; through the cooperative operation of the third motor 95 and the fourth motor 98, the holster 96 drives the spray gun 61 to automatically twist, and the powder spraying angle is adjusted; the V-shaped first carrier seat 92 and the inverted U-shaped second carrier seat 93 provide a stable installation basis for each component. Advantageous effects: the suspension structure driven by the double motors realizes the automatic twisting of the spray gun 61, the powder spraying angle can be flexibly adjusted, the powder spraying on the complex surface of the steel plate 6 is more uniform; the angle of the spray gun 61 does not need to be manually adjusted, the operation difficulty is reduced, and the production efficiency is improved; the V-shaped and inverted U-shaped carrier seats enhance the installation stability of each component, ensure that the spray gun 61 does not deviate during the twisting process, and improve the powder spraying precision.

[0059] As Figures 26-27Further, another structure of the spray gun 61 is shown. The second carrier plate 82 is provided with a pad 100, the pad 100 is provided with a second bearing seat 101, the second bearing seat 101 is rotatably connected with a rotating shaft 102, the diameter of the two ends of the rotating shaft 102 is smaller than the diameter of the middle section; the rotating shaft 102 is provided with a driving piece 103, the driving piece 103 drives the swing arm 104 to swing; the side wall of the rotating shaft 102 is provided with a sliding groove 105, the sliding groove 105 is slidably connected with a sliding block 106, the sliding block 106 is provided with the spray gun 61, the side wall of the spray gun 61 is provided with a first spring seat 107, the lower end of the first spring seat 107 is connected with a first spring 108, the lower end of the first spring 108 is connected with a second spring seat 109, and the second spring seat 109 is connected with the third carrier plate 85. The technical problems that the existing spray powder group 56 cannot adjust the position of the spray gun 61 along the rotating shaft 102, the spray powder range is limited, and the adaptability to different sizes of steel plates 6 is poor. Movement process: the rotating shaft 102 is installed on the second bearing seat 101 of the pad 100 of the second carrier plate 82, the sliding block 106 is slidably connected in the sliding groove 105 of the side wall of the rotating shaft 102, and the spray gun 61 is installed on the sliding block 106; the first spring seat 107 of the side wall of the spray gun 61 is connected with the first spring 108, the lower end of the first spring 108 is connected with the second spring seat 109, the second spring seat 109 is connected with the third carrier plate 85, the first spring 108 provides a restoring force for the sliding block 106; when the driving piece 103 drives the rotating shaft 102 to rotate, the sliding block 106 can slide along the sliding groove 105, the position of the spray gun 61 on the rotating shaft 102 is adjusted, and the spray powder range is expanded; the second bearing seat 101 ensures the stable rotation of the rotating shaft 102. Advantageous effects: the sliding block 106 and the sliding groove 105 cooperate to realize the sliding of the spray gun 61 along the rotating shaft 102, combined with the rotation of the rotating shaft 102, the spray powder range is greatly expanded, and the spray powder of different sizes of steel plates 6 is adapted; the first spring 108 provides a restoring force, which ensures that the sliding block 106 returns to the initial position without external force, and is convenient for next adjustment; the second bearing seat 101 enhances the rotation stability of the rotating shaft 102, and avoids the deviation of the spray gun 61 in the sliding and rotating process.

[0060] As Figure 27As shown, further, the pivot shaft 102 is provided with a swing arm 104 protruding from both ends thereof; the driving member 103 comprises third bearing seats 110 provided on the base plate 100, the two third bearing seats 110 are symmetrically arranged, the optical shaft 111 is rotationally connected to the third bearing seats 110, one end of the optical shaft 111 is connected with a cam 112, the eccentric surfaces of the two cams 112 are opposite to each other, the cam 112 is rollingly connected with the swing arm 104; the other end of the optical shaft 111 is connected with a first gear 113, the first gear 113 is meshed with a second gear 114, the second gear 114 is driven by a fifth motor 115, the second gear 114 drives the first gear 113 to rotate synchronously, and further drives the cam 112 to drive the swing arm 104 to reciprocatingly swing within a certain angle. The technical problem that can be solved: the existing powder spraying group 56 driving mode is complex, the swing arm 104 cannot be stably and reciprocatingly swung, and the swing angle control precision of the spray gun 61 is low. Movement process: the fifth motor 115 drives the second gear 114 to rotate, the second gear 114 meshes with the first gear 113, and the first gear 113 drives the optical shaft 111 to rotate on the third bearing seat 110; the cams 112 (the eccentric surfaces are opposite to each other) at both ends of the optical shaft 111 rotate with the optical shaft 111, the cam 112 is rollingly connected with the swing arm 104, and drives the swing arm 104 to reciprocatingly swing within a certain angle; the swing arm 104 drives the pivot shaft 102 to rotate, and the pivot shaft 102 drives the spray gun 61 on the sliding block 106 to swing; the third bearing seat 110 ensures that the optical shaft 111 rotates stably, and the double cams 112 synchronous driving ensures that the swing arm 104 is balanced in force. Advantageous effects: gear transmission cooperates with the cam 112 to drive, realizes stable and reciprocating swing of the swing arm 104, ensures that the swing angle of the spray gun 61 is accurately controllable; the double cams 112 synchronous driving avoids the swing arm 104 from deviating, and improves the swing stability of the spray gun 61; the structure is simple and reliable, the maintenance cost is low, and it is suitable for long-time continuous production demand.

[0061] As Figures 28-29As shown, further, the third gear 116 is mounted on the rotating shaft 102; the driving member 103 comprises a support frame 117 arranged on the base plate 100, the support frame 117 is rotatably connected with a sector gear 118, the sector gear 118 is engaged with the third gear 116; the sector gear 118 is connected with a strip plate 119, the strip plate 119 is provided with a limiting groove 120, the limiting groove 120 is slidably connected with a rotating rod 121, the rotating rod 121 is connected with an eccentric rod 122, the eccentric rod 122 is driven by a sixth motor 123, the sixth motor 123 drives the rotating shaft 102 to reciprocating swing. The technical problem solved by the present application is that the existing powder spraying group 56 cannot adjust the reciprocating swing angle of the rotating shaft 102, the driving mechanism occupies a large space, and the swing process is unstable. Movement process: the sixth motor 123 drives the eccentric rod 122 to rotate, the rotating rod 121 on the eccentric rod 122 slides in the limiting groove 120 of the strip plate 119, and drives the strip plate 119 to reciprocate; the strip plate 119 drives the sector gear 118 to rotate on the support frame 117, the sector gear 118 engages the third gear 116 on the rotating shaft 102, and drives the rotating shaft 102 to reciprocate swing; the rotating shaft 102 drives the spray gun 61 to swing; the limiting groove 120 limits the movement range of the rotating rod 121, controls the rotation angle of the sector gear 118, and further adjusts the swing angle of the rotating shaft 102; the support frame 117 ensures the stable installation of the sector gear 118. Advantageous effects: the eccentric rod 122 cooperates with the sector gear 118, the reciprocating swing angle of the rotating shaft 102 can be flexibly adjusted by adjusting the range of the limiting groove 120 or the eccentric distance of the eccentric rod 122, and different powder spraying requirements can be met; the driving mechanism has a compact structure and occupies a small space, which is convenient for installation and arrangement in the powder room 1; the gear engagement transmission is stable, which ensures the smooth swing process of the spray gun 61 and improves the uniformity of powder spraying.

[0062] Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can make modifications and improvements to the technical solutions described in the foregoing embodiments, or make equivalent replacements to some of the technical features, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A steel sheet powder spraying system for a steel coil characterized by, The utility model provides a kind of powder room, which comprises a powder room (1), a through gap (2) is formed on the powder room (1), and a hanging rail (3) is installed on the upper part of the through gap (2); a mobile carrier (4) is installed on the hanging rail (3), the steel plate (6) to be sprayed is connected by a hanging bracket (5), and the steel plate (6) moves along the through gap (2); a powder spraying device (7) is installed on the side of the powder room (1), the powder spraying devices (7) on the two sides are oppositely arranged, and the powder spraying device (7) is used to spray powder to the steel plate (6); a powder collecting bin (8) is installed at the lower part of the powder room (1), the powder collecting bin (8) is connected with a cyclone separator (10) through a first powder conveying pipe (9); the air outlet end of the cyclone separator (10) is connected with a bag-type dust collector (12) through a second powder conveying pipe (11), and the discharge end of the bag-type dust collector (12) is connected with a first powder collecting barrel (13); the discharge end of the cyclone separator (10) is connected with a second powder collecting barrel (14), a fan (15) is installed on the second powder collecting barrel (14), the fan (15) is connected with a powder screening machine (17) through a third powder conveying pipe (16), the outlet end of the powder screening machine (17) is connected with a powder supply barrel (18), and the powder supply barrel (18) supplies powder to the powder spraying device (7) through a fourth powder conveying pipe (19); the powder spraying device (7) comprises a powder spraying group (56); the powder spraying group (56) comprises a second carrier plate (82), the fourth guide rail (83) is arranged in parallel on the second carrier plate (82), the second sliding seat (84) is slidably connected to the fourth guide rail (83), the number of the second sliding seat (84) is five, the third carrier plate (85) is installed on the second sliding seat (84), the spacing of the third carrier plate (85) is the same, the positioning pin (86) is connected to the middle third carrier plate (85), and the positioning pin (86) is fixedly connected to the second carrier plate (82); the shaft sleeve (87) is arranged on the third carrier plate (85), the shaft sleeve (87) is rotatably connected with the shaft rod (88), and the prismatic telescopic connecting rod (89) is hingedly connected to the shaft rod (88); the telescopic rod (90) is connected to one side of the third carrier plate (85), and the end of the telescopic rod (90) is connected to the second carrier plate (82).

2. The steel coil steel sheet powder spraying system according to claim 1, characterized by, The powder room (1) comprises a supporting leg (20), the supporting leg (20) is installed with a base frame (21), the bottom surface of the base frame (21) is welded with a bottom plate (22), the side surface of the base frame (21) is welded with a box plate (23), the through gap (2) is left on the opposite box plates (23), the top surface of the base frame (21) is welded with a top plate (24), the base frame (21) is connected with the support plates (25) arranged at equal intervals, and the bottom surface of the support plate (25) is connected with the hanging rail (3); the top cover (26) is installed on the base frame (21); the lifting gap (27) is left on the opposite box plates (23).

3. The steel coil sheet powder spraying system according to claim 2, characterized in that, The hanging rail (3) comprises the first guide rail (28) connected with the top cover (26), the shape of the first guide rail (28) is inverted U-shaped, the second guide rail (29) is installed on the first guide rail (28), and the shape of the second guide rail (29) is H-shaped.

4. The steel coil sheet powder spraying system according to claim 3, characterized in that, The mobile carrier (4) comprises a roller (30) in rolling connection with the second guide rail (29), a wheel seat (31) is rotatably connected on the roller (30), a first carrier plate (32) is installed on the wheel seat (31), the two first carrier plates (32) are connected through a stud bolt (33), a first cloth hook (34) is installed on the stud bolt (33); a first bearing seat (35) is installed on the opposite surface of the first carrier plate (32), a drive gear (36) is rotatably connected on the first bearing seat (35), the drive gear (36) is driven by a first motor (37), a rack (38) is installed on the bottom surface of the second guide rail (29), and the rack (38) is in meshing connection with the drive gear (36).

5. The steel coil sheet powder spraying system according to claim 4, characterized in that, The hanger (5) comprises a first hook (39) hung with the first cloth hook (34), a hanger rod (40) is hung at the lower end of the first hook (39), a hanger lug (41) is connected on the side wall of the hanger rod (40), the upper hanger lug (41) is matched with the first hook (39), the lower hanger lug (41) is hung with a second hook (42), a second cloth hook (43) is hung at the lower end of the second hook (42), a magnet (44) is connected on the second cloth hook (43), and the magnet (44) is used for adsorbing a steel plate (6) to be sprayed.

6. The steel coil sheet powder spraying system according to claim 2, wherein, The powder spraying device (7) comprises a stand column (45), a third guide rail (46) is installed on the side wall of the stand column (45), a first sliding seat (47) is slidably connected on the third guide rail (46), a sliding table (48) is installed on the first sliding seat (47), a guide sleeve (49) is connected on the sliding table (48), a groove (50) is formed in the top surface of the stand column (45), a lead screw (51) is rotatably connected in the groove (50), and the lead screw (51) is matched with the guide sleeve (49); the lead screw (51) is driven through a worm gear mechanism (52), the worm gear mechanism (52) is driven by a second motor (53); a support arm (54) is connected on the sliding table (48), the support arm (54) extends into the lifting gap (27), the support arm (54) is used for installing a powder spraying group (56); a bellows (55) is installed in the lifting gap (27), and the free end of the bellows (55) is connected with the support arm (54).

7. The steel coil sheet powder spraying system according to claim 6, characterized in that, The powder spraying group (56) comprises an ear seat (57) arranged on the support arm (54), a buckle cover (58) is arranged on the ear seat (57), a support rod (59) is clamped and fixed between the ear seat (57) and the buckle cover (58), equidistantly arranged pipe seats (60) are arranged on the support rod (59), and spray guns (61) are arranged on the pipe seats (60).

8. The steel coil sheet powder spraying system according to claim 7, characterized in that, The spray gun (61) comprises a gun barrel (62), a high-pressure module (63) is installed in the gun barrel (62), a positioning tube (64) is installed in the gun barrel (62), an electrode needle (65) is connected to the positioning tube (64), the electrode needle (65) is connected with the high-pressure module (63), a powder conveying tube (66) is connected to the positioning tube (64), the powder conveying tube (66) is connected with a tee pipe (67) at the end, one port of the tee pipe (67) is connected with the fourth powder conveying tube (19), the other port of the tee pipe (67) is connected with a cleaning tube (68); the head of the gun barrel (62) is connected with a locking sleeve (69), and the electrode needle (65) is located in the locking sleeve (69).

9. The steel coil sheet powder spraying system of claim 1, wherein, The powder collecting bin (8) comprises a first bending plate (70), the shape of the first bending plate (70) is V-shaped, the first bending plate (70) is connected with a second bending plate (71), the shape of the second bending plate (71) is inverted V-shaped, the first bending plate (70) and the second bending plate (71) form a pentagonal powder collecting cavity (72), the inclined surface of the second bending plate (71) is provided with a through groove (73) for powder passing, and the powder collecting cavity (72) is installed with a powder suction tube (74), and the port of the powder suction tube (74) is connected with the first powder conveying tube (9).

10. The steel coil sheet powder spraying system according to claim 9, characterized in that, The inclined surface of the first bending plate (70) is installed with an air disc (75); the powder collecting cavity (72) is installed with an air charging box (76), the shape of the air charging box (76) is ridge-shaped, the inclined surface of the air charging box (76) is provided with uniformly distributed air holes (77), the inclined surface of the air charging box (76) is provided with a pressing strip (78), and the pressing strip (78) is connected with filter cloth (79) between the air charging box (76); the air charging box (76) is installed with a gas injection pipe (80), the other end of the gas injection pipe (80) extends out of the powder house (1), and the air charging box (76) is installed with a gas equalizing groove (81) covering the gas injection pipe (80).

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