A spraying device for metal surface treatment

Abstract

The present application discloses a spraying device for metal surface treatment, which relates to the technical field of metal surface treatment, and comprises a conveying device, a supporting part, a hub body and a bracket, wherein the supporting part is used for driving the hub body to rotate, and also comprises a spraying assembly; the spraying assembly comprises a spraying part, a powder spraying part, a baking chamber and a heat dissipation chamber; the spraying part is movably connected to the bracket, and the spraying part is used for spraying a passivation liquid on the surface of the hub body; the powder spraying part comprises an air intake seat 1 and a powder spraying chamber; the air intake seat 1 is movably connected to the bracket, and the powder spraying chamber is fixed on the air intake seat 1 near the hub body; the powder spraying chamber is filled with metal powder, the metal powder has a negative electrode, and the hub body has a positive electrode, and the powder spraying chamber is used for spraying metal powder on the surface of the hub body; the baking chamber is used for baking and curing the surface of the hub body; the passivation liquid on the surface of the hub body can be dried while the heat dissipation of the hub body is carried out, thereby improving work efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of metal part surface treatment, and in particular to a spraying device for metal surface treatment. Background Art

[0002] The automobile wheel hub is an important part of the automobile wheel. The surface of the automobile wheel hub needs to be sprayed during processing. The automobile wheel hub needs to go through a pretreatment stage before spraying. In order to make the wheel hub better resist the erosion of mud and sewage during driving, a passivation film is usually covered on the surface of the wheel hub. After that, the surface of the wheel hub is sprayed with powder, and the sprayed automobile wheel hub is baked at high temperature to fix the shape. The temperature of the baked automobile wheel hub is high and needs to be dissipated, which causes the workpiece to be switched back and forth on multiple conveyor lines, resulting in high production costs and low efficiency. Summary of the invention

[0003] The embodiment of the present application provides a spraying device for metal surface treatment, which solves the problem in the prior art that the workpiece needs to be switched back and forth between multiple processes, resulting in high production costs and low efficiency.

[0004] The embodiment of the present application provides a spraying device for metal surface treatment, including a conveying device, a supporting part, a hub body and a bracket, wherein the supporting part is used to drive the hub body to rotate, and also includes a spraying assembly;

[0005] The spraying assembly includes a spraying part, a powder spraying part, a baking chamber and a heat dissipation chamber;

[0006] The spraying part is movably connected to the bracket, and is used to spray the passivation liquid on the surface of the hub body;

[0007] The powder spraying part includes an air inlet seat and a powder spraying bin;

[0008] The air inlet seat 1 is movably connected to the bracket, and the powder spraying bin is fixed on the air inlet seat 1 near the wheel hub body;

[0009] The powder spraying bin is filled with metal powder, the metal powder has a negative electrode, the wheel hub body has a positive electrode, and the powder spraying bin is used to spray the metal powder on the surface of the wheel hub body;

[0010] The baking chamber is used to bake and solidify the surface of the hub body;

[0011] A heat supply pipe is fixed on the heat dissipation bin, and the free end of the heat supply pipe extends into the air inlet seat. A plurality of air drying pipes are fixed on the air inlet seat near the powder spraying bin, and the air outlet pipes of the air drying pipes extend out of the powder spraying bin. The air drying pipes are used to air dry the surface of the hub body.

[0012] Furthermore, the spray part includes a spray seat 1 and a water inlet pipe;

[0013] The spray seat 1 is a circular plate and is rotatably connected to the bracket. The side of the spray seat 1 close to the powder spray bin is fixed with an arc-shaped spray seat 2, and the interiors of the spray seat 1 and the spray seat 2 are connected;

[0014] A nozzle is fixed on one side of the spray seat 1 and the spray seat 2 close to the hub body, and an auxiliary pipe is fixed on the bottom of the spray seat 2;

[0015] The water outlet end of the water inlet pipe extends into the first spray seat, and the water inlet end of the water inlet pipe extends into the liquid storage tank, and the liquid storage tank is filled with passivation liquid.

[0016] Furthermore, the air inlet seat 1 is a hollow cylinder and an arc-shaped air inlet seat 2 is fixed on its side, the air inlet seat 1 and the air inlet seat 2 are connected to each other, and the side spray chamber is fixed to the air inlet seat 2;

[0017] A second air drying pipe is fixed on the second air inlet seat near the side spray bin, the air outlet end of the second air drying pipe extends out of the side spray bin, and a third air drying pipe is fixed at the bottom of the second air inlet seat;

[0018] The powder spraying bin is a hollow cylinder with an arc-shaped side spraying bin fixed on its side, and the side spraying bin and the powder spraying bin are connected to each other;

[0019] A plurality of powder spraying tubes 1 are fixed on one end of the powder spraying bin close to the hub body, and a plurality of powder spraying tubes 2 are fixed on the inner arc surface of the side spraying bin close to the hub body;

[0020] An inner spray pipe is fixed at the bottom of the side spray bin, the side spray bin is parallel to the wheel hub, and the powder spray bin is parallel to the wheel pair strip.

[0021] Furthermore, a plurality of preheating tubes are fixed on the air inlet seat 1 and the air inlet seat 2, and the air outlet end of the preheating tube on the air inlet seat 1 extends into the powder spraying bin;

[0022] The air outlet end of the preheating pipe on the second air inlet seat extends into the side spray chamber.

[0023] Furthermore, a shielding plate parallel to the side spraying bin is fixed on the side of the powder spraying bin, and a powder absorbing cotton is detachably connected to the inner side of the shielding plate close to the side spraying bin.

[0024] Furthermore, each of the air drying pipes 1 and 2 is movably connected to a hollow ball at the air outlet end, and the hollow ball is a sphere with a hollow interior and irregular through holes uniformly opened on the side.

[0025] Furthermore, a stirring portion is fixed on the gas outlet end of each of the preheating tubes;

[0026] The stirring portion includes a distribution pipe;

[0027] The preheating tube is a hollow tube body, the distribution tube is fixed on the side of the preheating tube, the distribution tube is a hollow tube body with one end open, the open end of the distribution tube extends into the preheating tube, and the middle part of the closed end of the distribution tube is movably connected with a fan blade;

[0028] An air jet nozzle is fixed on the closed end of the distribution pipe, and a one-way valve is fixed on the air jet nozzle.

[0029] Furthermore, the hub body includes a hub, a circular ring and a wheel pair strip, and a plurality of mounting holes are opened on the circular ring;

[0030] The support part comprises a rotating motor, a supporting rod and a plurality of positioning blocks, wherein the plurality of positioning blocks are fixed on the supporting rod, a positioning block extends into a mounting hole, and the rotating motor is used for driving the supporting rod to rotate.

[0031] Furthermore, a telescopic portion is fixed to one end of the powder spraying bin away from the air inlet seat;

[0032] The telescopic part includes an annular tube and a plurality of powder inlet tubes, each of which is fixed on the powder spraying bin, an annular telescopic bag is fixed on the free end of a powder inlet tube, and a powder outlet tube is fixed on the free end of a telescopic bag;

[0033] A plurality of side spray pipes are fixed on the bottom of each powder outlet pipe near the wheel pair strip, and the powder spraying ends of the side spray pipes are inclined toward the side of the wheel pair strip;

[0034] The annular tube is fixed on the powder spraying bin, and a plurality of air outlet pipes are fixed on the annular tube, and one air outlet pipe extends into a telescopic bag.

[0035] Furthermore, a through groove is formed at the bottom of the baking chamber, and two parallel soft capsules are fixed in the through groove, and the two soft capsules are in conflict with each other, and the support rod is squeezed between the two soft capsules after entering the baking chamber;

[0036] A ventilation pipe is fixed at the bottom of the baking bin, one end of the ventilation pipe extends into a soft bag, a branch pipe is fixed on the ventilation pipe, and the remaining end of the branch pipe is connected to the annular pipe.

[0037] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0038] Through the spraying assembly that is set up, hot air is sent into the powder spraying part through the heat delivery pipe, and the heat is used to dry the surface of the hub body, so that a passivation film is formed on the surface of the hub body. The heat dissipation of the hub body can be achieved while the passivation liquid on the surface of the hub body is air-dried, so that the hub body can complete the spraying, powder spraying, baking and heat dissipation operations on the same conveying route, saving the time of switching back and forth between multiple processes and improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of the three-dimensional structure of the spraying device for metal surface treatment of the present invention;

[0040] Figure 2 It is a front view structural schematic diagram of the spraying device for metal surface treatment of the present invention;

[0041] Figure 3 It is a rear perspective structural schematic diagram of the spraying device for metal surface treatment of the present invention;

[0042] Figure 4 It is a schematic diagram of the three-dimensional structure of the spraying part of the spraying device for metal surface treatment of the present invention from a side view;

[0043] Figure 5 It is a bottom-up three-dimensional structural schematic diagram of the spraying part of the metal surface treatment spraying device of the present invention;

[0044] Figure 6 It is a bottom-up three-dimensional structural schematic diagram of the powder spraying part of the metal surface treatment spraying device of the present invention;

[0045] Figure 7 It is a schematic diagram of the exploded three-dimensional structure of the powder spraying part of the metal surface treatment spraying device of the present invention;

[0046] Figure 8 It is a schematic diagram of the three-dimensional structure of the powder spraying bin of the metal surface treatment spraying device of the present invention from a side view;

[0047] Fig. 9 It is a schematic diagram of the cross-sectional structure of the powder spraying bin of the spraying device for metal surface treatment of the present invention;

[0048] Fig.10 It is a schematic diagram of the state of the stirring part of the metal surface treatment spraying device of the present invention in the powder spraying bin;

[0049] Fig.11 It is a schematic diagram of the three-dimensional structure of the shielding plate of the metal surface treatment spraying device of the present invention when viewed from above;

[0050] Fig.12 It is a schematic diagram of the three-dimensional structure of the stirring part of the metal surface treatment spraying device of the present invention;

[0051] Fig.13 It is a schematic diagram of a three-dimensional structure of an air inlet seat of a spraying device for metal surface treatment according to the present invention, viewed from above;

[0052] Fig.14 It is an exploded stereoscopic schematic diagram of a hub and a positioning block of the metal surface treatment spraying device of the present invention;

[0053] Fig.15 A schematic diagram of the positional relationship between the heat delivery pipe and the heat dissipation chamber of the metal surface treatment spraying device of the present invention;

[0054] Fig.16 A schematic diagram of the positional relationship between the branch pipe and the powder spraying bin of the metal surface treatment spraying device of the present invention;

[0055] Fig.17 It is a bottom-up three-dimensional structural schematic diagram of the telescopic part of the metal surface treatment spraying device of the present invention;

[0056] Fig.18 A bottom-up stereoscopic schematic diagram of the positional relationship between the annular tube and the hub body of the metal surface treatment spraying device of the present invention;

[0057] Fig.19 The metal surface treatment spraying device of the present invention Fig.18 A schematic diagram of the partially enlarged structure at center A;

[0058] Fig. 20 It is a top view schematic diagram of the positional relationship between the annular tube and the wheel pair strips of the metal surface treatment spraying device of the present invention.

[0059] In the figure: 100, conveying device; 110, support part; 111, rotating motor; 112, support rod; 113, positioning block; 120, hub body; 121, hub; 122, wheel pair strip; 130, collection box; 131, baffle plate; 140, bracket; 141, liquid storage tank;

[0060] 200, spray assembly; 210, spray part; 211, spray seat 1; 212, spray seat 2; 2121, auxiliary pipe; 213, water inlet pipe;

[0061] 220, powder spraying unit; 221, air inlet seat 1; 2211, air drying pipe 1; 2212, preheating pipe; 2213, hollow ball; 222, air inlet seat 2; 2221, air drying pipe 2; 2223, boost pipe; 2224, air drying pipe 3;

[0062] 223, powder spraying bin; 2231, side spraying bin; 2232, powder spraying pipe 1; 2233, powder spraying pipe 2; 2234, inner spraying pipe; 2235, shielding plate; 2236, powder absorbing cotton;

[0063] 224, stirring part; 2241, distribution pipe; 2242, air nozzle; 2243, fan blade;

[0064] 225, telescopic part; 2251, annular tube; 2252, powder inlet tube; 2253, telescopic bag; 2254, powder outlet tube; 2255, side spray tube;

[0065] 230, baking chamber; 231, ventilation pipe; 2311, branch pipe; 232, soft bag;

[0066] 240. heat dissipation chamber; 241. heat delivery pipe. DETAILED DESCRIPTION

[0067] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0068] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0069] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0070] like Figures 1 to 16 As shown, the present application proposes a spraying device for metal surface treatment, including a conveying device 100, a supporting portion 110, a hub body 120 and a bracket 140, wherein the supporting portion 110 is used to position the hub body 120, the supporting portion 110 is positioned on the conveying device 100, the hub body 120 on the supporting portion 110 is conveyed by the conveying device 100, the supporting portion 110 is used to drive the hub body 120 to rotate, and further includes a spraying assembly 200, the spraying assembly 200 is used to treat the surface of the hub body 120;

[0071] The spray assembly 200 includes a spraying part 210, a powder spraying part 220, a baking chamber 230 and a heat dissipation chamber 240;

[0072] The spraying part 210 is movably connected to the bracket 140, and a motor is fixed on the bracket 140. The motor is used to drive the spraying part 210 to rotate. The spraying part 210 is used to spray the passivation liquid on the surface of the hub body 120 to form a passivation film on the surface of the hub body 120, and at the same time clean the surface of the hub body 120, so that the powder is better adsorbed on the hub body 120;

[0073] The powder spraying part 220 includes an air inlet seat 221 and a powder spraying bin 223;

[0074] The air inlet seat 221 is movably connected to the bracket 140, and a driving motor is fixed on the bracket 140. The driving motor is used to drive the air inlet seat 221 to rotate, and the powder spraying bin 223 is fixed on the air inlet seat 221 near the hub body 120;

[0075] The powder spraying bin 223 is filled with metal powder, the metal powder has a negative electrode, the hub body 120 has a positive electrode, the support portion 110 has an electric field, and the conveying device 100 is in contact with the ground. The powder spraying bin 223 is used to spray metal powder on the surface of the hub body 120;

[0076] The baking chamber 230 is used to bake and cure the surface of the hub body 120 so that the powder on the surface of the hub body 120 is leveled and cured into a coating;

[0077] A heat supply pipe 241 is fixed on the heat dissipation bin 240, and an air pump is fixed on the heat supply pipe 241. The heat in the heat dissipation bin 240 is delivered to the air inlet seat 221 through the air pump. The spare end of the heat supply pipe 241 extends into the air inlet seat 221. A plurality of air drying pipes 2211 are fixed on the air inlet seat 221 near the powder spraying bin 223. The air outlet pipes of the air drying pipes 2211 extend out of the powder spraying bin 223. Each air drying pipe 2211 is airtightly fixed to the connection with the powder spraying bin 223. The air drying pipe 2211 is used for air drying the surface of the hub body 120. The drying temperature is appropriate to ensure the quality of the air drying of the passivation film. A through groove is opened at the bottom of the heat dissipation bin 240 to facilitate the passage of the support rod 112.

[0078] It is worth noting that the temperature of the hub body 120 is relatively high after being baked in the baking chamber 230. The hub body 120 enters the heat dissipation chamber 240 and is driven by the support part 110 to rotate and dissipate heat. The heat in the heat dissipation chamber 240 is drawn into the heat pipe 241 to accelerate heat dissipation, and the heat is used to dry the surface of the hub body 120, thereby accelerating the formation of the passivation film on the surface of the hub body 120.

[0079] Specifically, if Figures 1 to 5 As shown, the spray part 210 includes a spray seat 211 and a water inlet pipe 213;

[0080] The spray seat 1 211 is a circular plate and is rotatably connected to the bracket 140. An arc-shaped spray seat 212 is fixed to the side of the spray seat 1 211 close to the powder spray bin 223. The spray seat 1 211 and the spray seat 212 are connected to each other. The spray seat 212 is located in front of the wheel hub body 120 in the forward direction, and the spray seat 212 is parallel to the wheel hub body 120. That is to say, during the spraying process, the spray seat 212 can not only perform the spraying operation, but also prevent the liquid from splashing to the spraying area.

[0081] A nozzle is fixed on one side of the spray seat 1 211 and the spray seat 2 212 close to the hub body 120, and an auxiliary pipe 2121 is fixed at the bottom of the spray seat 212. The auxiliary pipe 2121 is used to spray the inner surface of the hub body 120, and can spray the inner and outer surfaces of the hub body 120 at the same time, and the height of the auxiliary pipe 2121 is lower than the hub body 120, that is, the auxiliary pipe 2121 does not affect the movement of the hub body 120, and the passivation liquid is sprayed through the nozzles and the auxiliary pipe 2121 on the spray seat 1 211 and the spray seat 2 212, and at the same time, the support part 110 drives the hub body 120 to rotate, so that the passivation liquid is sprayed on the inner and outer surfaces of the hub body 120;

[0082] The water outlet end of the water inlet pipe 213 extends into the spray seat 211, and the water inlet end of the water inlet pipe 213 extends into the liquid storage tank 141. The liquid storage tank 141 is filled with passivation liquid. The liquid storage tank 141 is located on one side of the bracket 140;

[0083] A collecting box 130 is positioned below the conveying device 100. The collecting box 130 is located below the spraying part 210. The collecting box 130 is used to collect liquid to prevent the passivation liquid from splashing everywhere. A baffle plate 131 is fixed to the collecting box 130 near the spraying part 210. The spraying part 210 is located in the baffle plate 131. An opening is opened on the side of the baffle plate 131 to facilitate the hub body 120 to pass through the baffle plate 131. The passivation liquid is blocked by the baffle plate 131 and enters the collecting box 130 along the baffle plate 131.

[0084] It is worth mentioning that in the initial state, the spray seat 212 and the air intake seat 222 are both located in front of the forward direction of the hub body 120. After the spraying of one hub body 120 is completed, the motor drives the spray seat 211 to rotate 90°, and the conveying device 100 drives the hub body 120 to enter the spraying area. Thereafter, the spray seat 211 rotates back to its original position and repeats the movement. After the powder spraying is completed, the driving motor drives the air intake seat 221 to rotate 90°, so that the hub body 120 after spraying can enter the baking chamber 230. The water inlet pipe 213 and the heat supply pipe 241 are both corrugated pipes, and can extend and retract with the rotation of the spray part 210 and the powder spraying part 220.

[0085] Specifically, if Figures 1 to 8 As shown, the air inlet seat 1 221 is a hollow cylinder and a curved air inlet seat 222 is fixed on its side. The air inlet seat 1 221 and the air inlet seat 222 are connected to each other, and the side spray chamber 2231 is fixed to the air inlet seat 222.

[0086] A second air drying pipe 2221 is fixed on the second air inlet seat 222 near the side spray chamber 2231, and the air outlet end of the second air drying pipe 2221 extends out of the side spray chamber 2231. The second air drying pipe 2221 is used to air dry the surface of the hub body 120. While air drying the surface of the hub body 120, the temperature of the hub body 120 itself can be increased, so that the metal powder can be better adsorbed on the hub body 120;

[0087] A third air drying pipe 2224 is fixed at the bottom of the second air inlet seat 222, and the third air drying pipe 2224 is used to air dry the inner side of the hub body 120;

[0088] The powder spraying bin 223 is a hollow cylinder with a curved side spraying bin 2231 fixed on its side, and the side spraying bin 2231 is connected to the inside of the powder spraying bin 223;

[0089] A plurality of powder spraying tubes 2232 are fixed on one end of the powder spraying bin 223 close to the hub body 120, and the powder spraying tube 2232 is used to spray powder on the upper surface of the hub 121 and the wheel pair strip 122. A plurality of powder spraying tubes 2233 are fixed on the inner arc surface of the side spraying bin 2231 close to the hub body 120, and the powder spraying tube 2233 is used to spray powder on the side of the hub 121. The powder spraying bin 223 is pressurized by the booster tube 2223 to spray metal powder on the surface of the hub body 120. The booster tube 2223 is fixed on the air intake seat 222, and a jet pump is fixed on the booster tube 2223. The jet pump is fixed on the air intake seat 222, and the booster tube 2223 does not affect the rotation of the powder spraying part 220.

[0090] An inner nozzle 2234 is fixed at the bottom of the side spray bin 2231. The inner nozzle 2234 is located below the hub body 120 and does not affect the movement of the hub body 120. The inner nozzle 2234 is used to spray powder on the inner surface of the hub 121. The inner and outer surfaces of the hub body 120 can be sprayed with powder at the same time. When adding materials to the powder spray bin 223, the hub body 120 is selected to be in the spraying area, and the addition and preheating of the metal powder are not affected, so that the equipment can be added without stopping.

[0091] The powder spraying bin 223 is parallel to the wheel pair strip 122, and the side spraying bin 2231 is parallel to the wheel hub 121. Similarly, the spray seat 1 211 is parallel to the wheel pair strip 122, and the spray seat 212 is parallel to the wheel hub 121. That is to say, the spray seat 1 211 and the powder spraying bin 223 are used for spraying and powdering the upper surface of the wheel hub 121 and the wheel pair strip 122, the side spraying bin 2231 and the spray seat 212 are used for spraying and powdering the side of the wheel hub 121, the auxiliary pipe 2121 and the inner spray pipe 2234 are used for spraying and powdering the inner surface of the wheel hub 121 and the wheel pair strip 122, and for spraying and powdering the wheel hub body 120 comprehensively.

[0092] In the above embodiment, the hub body 120 is transported to the bottom of the spraying part 210 by the transporting device 100, and the hub body 120 is covered with the passivation liquid after being sprayed by the spraying part 210, and then the hub body 120 continues to move to the bottom of the powder spraying bin 223, and the heat in the heat dissipation bin 240 is sent to the air intake seat 1 221 through the heat delivery pipe 241, so that the hot air is ejected from the air drying pipe 1 2211 and the air drying pipe 2 2221, and the surface of the hub body 120 begins to be air-dried as the hub body 120 rotates, and the temperature of the hub body 120 is increased, and after the air drying is completed, the air intake in the heat delivery pipe 241 stops;

[0093] Afterwards, metal powder with negative charge is sprayed out through the powder spraying pipe 1 2232, the powder spraying pipe 2 2233 and the inner spraying pipe 2234. As the hub body 120 rotates, the metal powder is adsorbed on the inner and outer surfaces of the hub body 120 and sprayed on the hub body 120. After the spraying, the hub body 120 enters the baking chamber 230. The metal powder on the surface of the hub body 120 is baked by the baking chamber 230. After the surface of the hub body 120 is baked, it enters the heat dissipation chamber 240. The hub body 120 is driven by the support part 110. 120 rotates, increasing the contact strength between the hub body 120 and the air, improving the heat dissipation efficiency of the hub body 120, and sending hot air into the powder spraying part 220 through the heat delivery pipe 241, which can achieve heat dissipation of the hub body 120 and air drying of the passivation liquid on the surface of the hub body 120, reducing resource waste, saving usage costs, and improving the spraying quality. The hub body 120 can complete spraying, powder spraying, baking and heat dissipation operations on the same conveying route, saving time for switching back and forth between multiple processes, and improving work efficiency.

[0094] In some embodiments of the present application, Figures 6 to 10 As shown, a plurality of preheating tubes 2212 are fixed on the air inlet seat 1 221 and the air inlet seat 2 222. The air outlet end of the preheating tube 2212 on the air inlet seat 1 221 extends into the powder spraying bin 223. The connection between the preheating tube 2212 on the air inlet seat 1 221 and the powder spraying bin 223 is airtightly fixed.

[0095] The air outlet end of the preheating pipe 2212 on the second air inlet seat 222 extends into the side spray bin 2231 , and the connection between the preheating pipe 2212 on the second air inlet seat 222 and the side spray bin 2231 is airtightly fixed.

[0096] On the basis of the above embodiment, after the hot air in the heat supply pipe 241 enters the air intake seat 1 221 and the air intake seat 222, a part of it is sprayed out from the air drying pipe 1 2211 and the air drying pipe 2 2221, and a part of it enters the powder spraying bin 223 and the side spraying bin 2231 from the preheating pipe 2212, which can preheat the metal powder in the powder spraying bin 223 and the side spraying bin 2231 and spray the heated metal powder, thereby increasing the adhesion between the metal powder and the hub body 120, improving the spraying effect, and saving baking time.

[0097] Specifically, if Fig.11 As shown, a baffle plate 2235 parallel to the side spray bin 2231 is fixed on the side of the powder spray bin 223, and a powder absorbing cotton 2236 is detachably connected to the inner side of the baffle plate 2235 close to the side spray bin 2231. The powder absorbing cotton 2236 is used to intercept metal powder, reduce the flying of metal powder and collect the metal powder at the same time.

[0098] It is worth mentioning that there are dense holes on the powder-absorbing cotton 2236 to facilitate the interception of metal powder and reduce the flying of dust. After the powder-absorbing cotton 2236 is saturated, the powder-absorbing cotton 2236 is removed, and the metal powder is separated and collected by hitting the powder-absorbing cotton 2236, which can reduce the flying of dust and recover the metal powder at the same time.

[0099] Specifically, if Fig.13 As shown, each of the air drying pipes 1 2211 and each of the air drying pipes 2 2221 is movably connected with a hollow ball 2213 at the air outlet end. The hollow ball 2213 is a sphere with a hollow interior and irregular through holes uniformly opened on the side.

[0100] It is worth noting that when hot air passes through the hollow ball 2213, the gas is affected by the irregular through holes on the side of the hollow ball 2213 to generate turbulence, which can effectively promote heat transfer and improve heat transfer efficiency.

[0101] Specifically, if Figures 9 to 12 As shown, a stirring portion 224 is fixed on the gas outlet end of each preheating tube 2212, and the stirring portion 224 is used to evenly distribute the heat of the metal powder;

[0102] The stirring portion 224 includes a distribution pipe 2241;

[0103] The preheating tube 2212 is a hollow tube body, and the distribution tube 2241 is fixed to the side of the preheating tube 2212. The distribution tube 2241 is a hollow tube body with one end open. The open end of the distribution tube 2241 extends into the preheating tube 2212. The distribution tube 2241 is communicated with the interior of the preheating tube 2212, and the middle part of the closed end of the distribution tube 2241 is movably connected with a fan blade 2243.

[0104] A gas nozzle 2242 is fixed on the closed end of the distribution pipe 2241 . The gas nozzle 2242 is used to spray hot air and drive the fan blades 2243 to rotate. A one-way valve is fixed on the gas nozzle 2242 . The one-way valve is used to prevent metal powder from entering the distribution pipe 2241 .

[0105] In the above embodiment, the flow velocity of hot air is accelerated when it is ejected from the air nozzle 2242, blowing away the metal powder near the air nozzle 2242 to preheat the metal powder. At the same time, the fan blades 2243 are exposed to the jet range of the air nozzle 2242, and the airflow is used to drive the fan blades 2243 to rotate, thereby increasing the flow velocity of the hot air. At the same time, the rotating fan blades 2243 are used to lift the surrounding metal powder, thereby increasing the contact area between the hot air and the metal powder, so that the metal powder is preheated more evenly.

[0106] In some embodiments of the present application, Figures 14 to 20 As shown, the hub body 120 includes a hub 121, a circular ring and a wheel pair strip 122. The circular ring is provided with a plurality of mounting holes. There are a plurality of wheel pair strips 122. The wheel pair strips 122 are fixed to the outer side of the circular ring, and the axis of the circular ring coincides with the axis of the hub 121. The free end of the wheel pair strip 122 is fixed to the inner side of the hub 121. The side spraying bin 2231 coincides with the axis of the hub 121, which means that the spraying distance between the side spraying bin 2231 and the side of the hub 121 is equal, so that the surface of the hub 121 is sprayed evenly.

[0107] It is worth noting that the positioning block 113 is in contact with the mounting hole. The positioning block 113 is used to position the ring and block the mounting hole to prevent powder from entering the mounting hole during spraying, thereby ensuring the tightness of the bolt connection in the mounting hole. A gap is left between the bottom of the ring and the positioning block 113, which does not affect the spraying of the bottom of the ring.

[0108] The support part 110 includes a rotating motor 111, a support rod 112 and a plurality of positioning blocks 113. The plurality of positioning blocks 113 are fixed on the support rod 112. One positioning block 113 extends into a mounting hole. The rotating motor 111 is positioned with the conveying device 100 through a connecting rod. The rotating motor 111 is located at the bottom of the support rod 112. The rotating motor 111 is used to drive the support rod 112 to rotate.

[0109] In some embodiments of the present application, Figures 16 to 20 As shown, a telescopic portion 225 is fixed to the end of the powder spraying bin 223 away from the air inlet seat 221;

[0110] The telescopic portion 225 includes an annular tube 2251 and a plurality of powder inlet tubes 2252, each of which is fixed on the powder spraying bin 223, and the powder inlet tube 2252 is communicated with the interior of the powder spraying bin 223, an annular telescopic bag 2253 is fixed on the free end of a powder inlet tube 2252, and a powder outlet tube 2254 is fixed on the free end of a telescopic bag 2253;

[0111] A plurality of side nozzles 2255 are fixed to the bottom of each of the powder outlet pipes 2254 near the wheel strip 122. The powder spraying end of the side nozzle 2255 is inclined toward the side of the wheel strip 122. The side of the wheel strip 122 is located inside the wheel hub 121. During spraying, the side of the wheel strip 122 is unevenly contacted with the metal powder. That is, the side nozzles 2255 facilitate spraying of the side of the wheel strip 122, and the side nozzles 2255 do not affect the rotation of the wheel hub 121.

[0112] The annular tube 2251 is fixed on the powder spraying bin 223, and the axis of the annular tube 2251 coincides with that of the powder spraying bin 223. The annular tube 2251 is located outside the powder inlet pipe 2252. A plurality of air outlet pipes are fixed on the annular tube 2251, and one air outlet pipe extends into a telescopic bag 2253. The air inlet end of the annular tube 2251 is connected to the air pump through a pipeline. The air in the annular tube 2251 is inflated to expand the telescopic bag 2253 and drive the powder outlet pipe 2254 to move downward.

[0113] In the above embodiment, the annular tube 2251 is inflated to expand the telescopic bag 2253 and drive the powder outlet pipe 2254 to move down close to the wheel pair strip 122, so that the powder outlet pipe 2254 is located above the wheel pair strip 122. At this time, the metal powder sprayed by the side nozzle 2255 can cover the side area of ​​the wheel pair strip 122. The metal powder sprayed by the side nozzle 2255 is evenly sprayed on the side of the rotating wheel pair strip 122, so that the surface of the hub body 120 can be evenly sprayed.

[0114] In some embodiments of the present application, Figures 16 to 20 As shown, the baking bin 230 has a through groove at the bottom, and two parallel soft capsules 232 are fixed in the through groove, and the two soft capsules 232 are in conflict with each other, which is convenient for sealing the baking bin 230, and does not affect the movement of the support rod 112 in the baking bin 230. After entering the baking bin 230, the support rod 112 squeezes into between the two soft capsules 232. The soft capsule 232 has good high temperature resistance, and the temperature in the baking bin 230 will not damage the soft capsule 232. A baking device is fixed in the baking bin 230, and the workpiece is baked by generating heat through the baking device;

[0115] A vent pipe 231 is fixed to the bottom of the baking bin 230, one end of the vent pipe 231 extends into a soft bag 232, the connection between the vent pipe 231 and the soft bag 232 is airtight and fixed, the vent pipe 231 does not affect the movement of the support rod 112, the other end of the vent pipe 231 is connected to the air pump, the air pump is fixed on the baking bin 230, a branch pipe 2311 is fixed on the vent pipe 231, the branch pipe 2311 is a hose, and the free end of the branch pipe 2311 is connected to the annular pipe 2251.

[0116] In the above embodiment, when the previous wheel hub body 120 moves into the baking chamber 230, the next wheel hub body 120 starts to be sprayed, and the air pump is used to inflate the air pipe 231 to expand the soft bag 232 and the telescopic bag 2253 at the same time. The expansion of the soft bag 232 wraps the support rod 112 tightly, so that the wheel hub body 120 is in the closed baking chamber 230. At the same time, the expansion of the telescopic bag 2253 drives the side nozzle 2255 to reach the spraying range of the side of the wheel pair strip 122, and then the air intake is stopped. After the baking of the previous wheel hub body 120 in the baking chamber 230 is completed, the spraying of the next wheel hub body 120 is completed, and the air in the air pipe 231 is evacuated to reset the soft bag 232 and the telescopic bag 2253. It can achieve the sealing of the baking chamber 230 while driving the side nozzle 2255 to the specified position, thereby improving the processing efficiency.

[0117] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A spraying device for metal surface treatment, comprising a conveying device (100), a support portion (110), a hub body (120) and a bracket (140), wherein the support portion (110) is used to drive the hub body (120) to rotate, and is characterized in that: Also included is a spray assembly (200); The spraying assembly (200) comprises a spraying portion (210), a powder spraying portion (220), a baking chamber (230) and a heat dissipation chamber (240); The spraying part (210) is movably connected to the bracket (140), and the spraying part (210) is used to spray the passivation liquid on the surface of the hub body (120); The powder spraying portion (220) comprises an air inlet seat (221) and a powder spraying bin (223); The air inlet seat 1 (221) is movably connected to the bracket (140), and the powder spraying bin (223) is fixed on the air inlet seat 1 (221) near the wheel hub body (120); The powder spraying bin (223) is filled with metal powder, the metal powder has a negative electrode, the wheel hub body (120) has a positive electrode, and the powder spraying bin (223) is used to spray the metal powder on the surface of the wheel hub body (120); The baking chamber (230) is used to bake and solidify the surface of the hub body (120); A heat supply pipe (241) is fixed on the heat dissipation bin (240), and the free end of the heat supply pipe (241) extends into the air inlet seat (221). A plurality of air drying pipes (2211) are fixed on the air inlet seat (221) near the powder spray bin (223), and the air outlet pipes of the air drying pipes (2211) extend out of the powder spray bin (223). The air drying pipes (2211) are used to air dry the surface of the hub body (120); The air inlet seat 1 (221) is a hollow cylindrical body and a curved air inlet seat 2 (222) is fixed on its side. The air inlet seat 1 (221) and the air inlet seat 2 (222) are internally connected, and the side spray chamber (2231) is fixed to the air inlet seat 2 (222); A second air drying pipe (2221) is fixed on the second air inlet seat (222) near the side spray bin (2231), the air outlet end of the second air drying pipe (2221) extends out of the side spray bin (2231), and a third air drying pipe (2224) is fixed at the bottom of the second air inlet seat (222); The powder spraying bin (223) is a cylindrical body with a hollow interior and a curved side spraying bin (2231) is fixed on its side, and the side spraying bin (2231) and the powder spraying bin (223) are internally connected; A plurality of first powder spraying tubes (2232) are fixed to one end of the powder spraying bin (223) close to the hub body (120), and a plurality of second powder spraying tubes (2233) are fixed to the inner arc surface of the side spraying bin (2231) close to the hub body (120); An inner spray pipe (2234) is fixed at the bottom of the side spray bin (2231); the side spray bin (2231) is parallel to the wheel hub (121); and the powder spray bin (223) is parallel to the wheel pair strip (122); A plurality of preheating tubes (2212) are fixed on the air inlet seat 1 (221) and the air inlet seat 2 (222), and the air outlet ends of the preheating tubes (2212) on the air inlet seat 1 (221) extend into the powder spraying bin (223); The gas outlet end of the preheating pipe (2212) on the second gas inlet seat (222) extends into the side spray bin (2231); A stirring portion (224) is fixed on the gas outlet end of each preheating tube (2212); The stirring portion (224) includes a distribution pipe (2241); The preheating tube (2212) is a tube body with a hollow interior, the distribution tube (2241) is fixed to the side of the preheating tube (2212), the distribution tube (2241) is a tube body with a hollow interior and an open end, the open end of the distribution tube (2241) extends into the preheating tube (2212), and the middle part of the closed end of the distribution tube (2241) is movably connected to a fan blade (2243); An air nozzle (2242) is fixed on the closed end of the distribution pipe (2241), and a one-way valve is fixed on the air nozzle (2242); A telescopic portion (225) is fixed to one end of the powder spraying bin (223) away from the air inlet seat (221); The telescopic portion (225) comprises an annular tube (2251) and a plurality of powder inlet tubes (2252), each powder inlet tube (2252) being fixed to the powder spraying bin (223), an annular telescopic bag (2253) being fixed to the free end of a powder inlet tube (2252), and a powder outlet tube (2254) being fixed to the free end of a telescopic bag (2253); A plurality of side spray pipes (2255) are fixed to the bottom of each of the powder outlet pipes (2254) close to the wheel pair strip (122), and the powder spraying ends of the side spray pipes (2255) are inclined toward the side of the wheel pair strip (122); The annular tube (2251) is fixed on the powder spraying bin (223), and a plurality of air outlet pipes are fixed on the annular tube (2251), and one air outlet pipe extends into one telescopic bag (2253); The wheel hub body (120) comprises a wheel hub (121), a circular ring and a wheel pair strip (122), and a plurality of mounting holes are formed on the circular ring; The support portion (110) comprises a rotating motor (111), a supporting rod (112) and a plurality of positioning blocks (113); the plurality of positioning blocks (113) are fixed on the supporting rod (112); a positioning block (113) extends into a mounting hole; and the rotating motor (111) is used to drive the supporting rod (112) to rotate. After being baked in the baking chamber (230), the hub body (120) has a relatively high temperature. The hub body (120) enters the heat dissipation chamber (240) and is driven by the support portion (110) to rotate and dissipate heat. The heat in the heat dissipation chamber (240) is drawn into the heat delivery pipe (241) to accelerate heat dissipation. The heat is used to dry the surface of the hub body (120) and accelerate the formation of a passivation film on the surface of the hub body (120).

2. The metal surface treatment spraying device according to claim 1, characterized in that: The spraying part (210) comprises a spraying seat (211) and a water inlet pipe (213); The spray seat 1 (211) is a circular plate and is rotatably connected to the bracket (140). An arc-shaped spray seat 2 (212) is fixed to the side of the spray seat 1 (211) close to the powder spray bin (223). The spray seat 1 (211) and the spray seat 2 (212) are internally connected. A nozzle is fixed on one side of the spray seat 1 (211) and the spray seat 2 (212) close to the hub body (120), and an auxiliary pipe (2121) is fixed on the bottom of the spray seat 2 (212); The water outlet end of the water inlet pipe (213) extends into the first spray seat (211), and the water inlet end of the water inlet pipe (213) extends into the liquid storage tank (141), and the liquid storage tank (141) is filled with passivation liquid; A collection box (130) is positioned below the conveying device (100), the collection box (130) is located below the spraying portion (210), and a baffle plate (131) is fixed to the collection box (130) near the spraying portion (210).

3. The metal surface treatment spraying device according to claim 1, characterized in that: A shielding plate (2235) parallel to the side spraying bin (2231) is fixed to the side of the powder spraying bin (223), and a powder absorbing cotton (2236) is detachably connected to the inner side of the shielding plate (2235) close to the side spraying bin (2231).

4. The metal surface treatment spraying device according to claim 1, characterized in that: Each of the air drying pipes 1 (2211) and each of the air drying pipes 2 (2221) is movably connected to a hollow ball (2213) at the air outlet end. The hollow ball (2213) is a sphere with a hollow interior and irregular through holes uniformly opened on the side.

5. The metal surface treatment spraying device according to claim 1, characterized in that: The baking chamber (230) has a through groove at the bottom, and two parallel soft capsules (232) are fixed in the through groove. The two soft capsules (232) are in contact with each other, and the support rod (112) enters the baking chamber (230) and squeezes into between the two soft capsules (232); A ventilation pipe (231) is fixed at the bottom of the baking chamber (230), one end of the ventilation pipe (231) extends into a soft bag (232), a branch pipe (2311) is fixed on the ventilation pipe (231), and the free end of the branch pipe (2311) is connected to the annular pipe (2251).

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