Intelligent spraying equipment for steel pretreatment line

Abstract

The present application relates to the technical field of steel plate spraying treatment, and particularly relates to an intelligent spraying equipment of a steel pretreatment line; the intelligent spraying equipment can reduce the scattering of paint, ensure the clean construction environment, reduce the waste of paint, and is more environmentally friendly; the intelligent spraying equipment comprises a feeding roller way and a paint spraying room, the feeding roller way is used for conveying the steel plate into the paint spraying room; the intelligent spraying equipment further comprises a paint spraying trolley slidingly installed in the paint spraying room, a transverse moving driver providing power for the sliding of the paint spraying trolley, a paint spraying pump, a paint supply pipeline and a paint spraying mechanism installed on the paint spraying trolley, the paint spraying mechanism comprises an outer cylinder, an inner cylinder fixedly installed in the outer cylinder, a mounting shell fixedly installed in the inner cylinder, a double-shaft head motor fixedly installed in the mounting shell, a flow guide cover installed at an outflow end of the outer cylinder, a plurality of return pipes and a collecting cover, a hollow shaft is rotatably installed on the double-shaft head motor, an inclined blade turbine is fixedly installed at one end of the hollow shaft, and a nozzle is installed at the other end of the hollow shaft.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of steel plate spraying treatment, in particular to an intelligent spraying equipment of a steel pretreatment line. BACKGROUND

[0002] The main component of a steel plate is iron, which is prone to chemical reaction with oxygen to form rust in humid environments, and rust greatly weakens the strength, hardness and service life of the steel plate. The coating on the surface of the steel plate can form a dense and continuous protective film on the surface of the steel plate, which physically isolates the steel plate from contact with external moisture, oxygen and corrosive chemicals, thereby fundamentally preventing or significantly delaying the occurrence of rust. Therefore, during the pretreatment of the steel plate, the steel plate needs to be subjected to corrosion prevention spraying treatment.

[0003] A steel plate longitudinal spraying production line is disclosed in the utility model patent application with publication number CN214390763U, which comprises a spraying equipment, a steel plate clamping device and a spraying house. The dust removal equipment comprises a washing tower, an induced draft fan, a dust removal pipeline, a dust removal cover and a cover net. The dust removal cover air inlet is connected to the inside of the spraying house, which can make the steel plate stand up and be vertically conveyed and sprayed, has good dust removal effect, has no explosion risk and has high work efficiency.

[0004] However, during the longitudinal spraying of the steel plate, part of the paint falls to the ground under the action of gravity, and part of the paint spreads around, which not only causes waste of paint, but also causes poor on-site construction environment and increases the processing burden of the subsequent dust removal equipment. SUMMARY

[0005] In view of the deficiencies of the prior art, the present application provides an intelligent spraying equipment of a steel pretreatment line, which reduces the scattering of paint everywhere, ensures a clean on-site construction environment, reduces paint waste and is more environmentally friendly.

[0006] In order to achieve the above object, the application provides the following technical scheme: an intelligent spraying equipment of a steel pretreatment line, comprising a feeding roller way and a paint spraying room, the feeding roller way is used for conveying a steel plate into the paint spraying room; further comprising a paint spraying trolley slidingly installed in the paint spraying room, a transverse moving driver providing power for the sliding of the paint spraying trolley, a paint spraying pump, a paint supply pipeline and a paint spraying mechanism installed on the paint spraying trolley, the paint spraying mechanism comprises an outer cylinder, an inner cylinder fixedly installed in the outer cylinder, a mounting shell fixedly installed in the inner cylinder, a double-shaft head motor fixedly installed in the mounting shell, a flow guide cover installed at an outflow end of the outer cylinder, a plurality of return pipes and a collecting cover, a hollow shaft is rotatably installed on the double-shaft head motor, one end of the hollow shaft is fixedly installed with an inclined blade turbine, the other end of the hollow shaft is installed with a nozzle, a hollow cavity in communication with an input end of the nozzle is arranged in the hollow shaft, one end of the paint supply pipeline is in communication with an output end of the paint spraying pump, the other end of the paint supply pipeline is in rotatable sealing communication with the hollow shaft, the collecting cover is arranged at an edge of an outflow end port of the flow guide cover, and one end of the return pipe penetrates through the outer cylinder and extends into the inner cylinder.

[0007] Further, the transverse moving driver is preferably a mechanical sliding table, and other drivers with the function of driving the paint spraying trolley to slide can also be adopted, and the mechanical sliding table is provided with an organ case and a Siemens servo motor to realize the driving of the paint spraying trolley.

[0008] The central axes of the outer cylinder, the inner cylinder, the double-shaft head motor and the flow guide cover coincide.

[0009] The flow guide cover can adopt a cylindrical cover or a conical cover; an annular air inlet channel is formed between the mounting shell and the inner cylinder, the inclined blade turbine is installed at the joint of the inner cylinder and the mounting shell, and the inclined blade turbine is used for pressurizing the airflow in the inner cylinder to form a rotational flow; the paint supply pipeline is connected with the hollow shaft in rotatable sealing; and the input end of the paint spraying pump extends into an external paint supply cylinder.

[0010] A plurality of return pipes are uniformly distributed around the collecting cover; the outer cylinder is provided with a mounting flange, and the mounting flange is fixedly connected with the paint spraying trolley through bolts.

[0011] The paint supply pipeline adopts a flexible plastic pipe, a hanging beam is fixedly installed in the paint spraying room, a plurality of groups of hanging hooks are slidingly installed on the hanging beam, and the paint supply pipeline is fixedly installed on each hanging hook.

[0012] Preferably, the flow guide cover comprises a plurality of flow guide vane plates hingedly installed at an outflow end of the inner cylinder, a driving ring frame rotatably installed outside the outer cylinder and a rotary driving piece providing power for the rotation of the driving ring frame, the flow guide vane plate is provided with a driving handle, the driving ring frame is provided with a plurality of inclined sliding grooves obliquely arranged along the axial direction of the driving ring frame, and the driving handle extends into the corresponding inclined sliding groove.

[0013] Further, the rotating driving member is preferably a telescopic cylinder, which can be an electric cylinder, a pneumatic cylinder or a hydraulic cylinder. One end of the telescopic cylinder is hingedly connected to the outer wall of the inner cylinder, and the other end of the telescopic cylinder is hingedly connected to the driving ring frame.

[0014] The rotating driving member can also be a brake motor and a driving wheel. The driving wheel is fixedly installed on the output end of the brake motor and is in transmission connection with the driving ring frame. The rotating driving member can also be other equivalent members that can drive the driving ring frame to reciprocating rotate.

[0015] Preferably, the guide vane plate is a V-shaped bent plate. Adjacent two V-shaped bent plates are overlapped with each other. The V-shaped bent plate is provided with a scraping member. The scraping member is provided with an opening allowing the adjacent group of V-shaped bent plates to pass through.

[0016] Further, the plurality of V-shaped bent plates are overlapped in clockwise direction or counterclockwise direction. The overlapping mode of the V-shaped bent plates should be consistent with the rotating flow direction in the flow guide cover, so as to reduce the amount of paint adhered at the junction of the V-shaped bent plates. The V-shaped bent plate is made of a plastic plate or a thin-walled metal plate with certain plasticity. The scraping member is parallel to the V-shaped bent plate. The scraping member is made of hard rubber material with certain plasticity. The inner wall of the opening is in close contact with the inner wall of the corresponding V-shaped bent plate.

[0017] Preferably, the inner cylinder is provided with a plurality of air inlets. The air inlets are provided with air volume adjusting valves.

[0018] Further, the air volume adjusting valve is preferably a petal type air adjusting valve. The petal type air adjusting valve comprises a valve body, a plurality of arc-shaped valve plates rotatably installed in the valve body and a connecting rod synchronous driving member for providing power for the rotation of the arc-shaped valve plates. When the plurality of valve plates are closed, the valve body is completely blocked. The connecting rod synchronous driving member drives the valve plates to rotate, so that the distance between the adjacent two valve plates changes, thereby adjusting the air volume entering the inner cylinder. The air volume adjusting valve can also be a butterfly valve, a gate valve or other equivalent valve members with air volume adjusting effect.

[0019] Preferably, a paint basin is installed in the paint spraying room. The bottom of the paint basin is provided with a drain pipe. The drain pipe is provided with an on-off valve. Further, the paint basin is installed on the side of the paint spraying room away from the steel plate. The height of the paint basin is lower than the height of the paint spraying mechanism. A position switch is installed at the paint basin. The position switch is signal connected with the horizontal movement driver through an external PLC system. When the position switch detects that the paint spraying mechanism is located above the paint basin, the horizontal movement driver stops, so that the paint spraying mechanism stays above the paint basin.

[0020] Preferably, the plurality of nozzles are uniformly distributed in the circumferential direction around the hollow shaft. The outlet ends of the plurality of nozzles are away from the central axis of the hollow shaft. Further, the distance between the outlet end of the nozzle and the central axis of the hollow shaft is at least 2 cm.

[0021] Preferably, the paint spraying trolley is provided with a paint film thickness detector; further, the paint film thickness detector is installed on the paint spraying trolley and located at the side of the paint spraying mechanism in the direction of the steel plate.

[0022] The paint film thickness detector is preferably a non-destructive magnetic thickness gauge, an eddy current thickness gauge or an ultrasonic thickness gauge, etc., and the paint film thickness monitor can adopt a conventional product known on the market, which will not be further limited and described here. The paint film thickness detector is connected with an external processor (computer or PLC control system) and a display, and the operator can read the paint spraying thickness of the steel plate in real time through the display. When the paint film thickness detector detects that the paint spraying thickness of the steel plate is unqualified, the paint film thickness detector transmits an electrical signal to the external processor, and the signal is displayed on the display and an early warning is given through the external processor, so as to realize intelligent dynamic monitoring of the paint spraying of the steel plate. It should be noted that if the paint film thickness detector is installed in the paint spraying room, the detection end of the paint film thickness detector needs to be cleaned regularly to avoid the adhesion of overspray paint on the paint film thickness detector, which affects the detection accuracy of the paint spraying thickness of the steel plate. In order to reduce the influence of overspray paint on the detection accuracy of the paint film thickness detector, the paint film thickness detector is preferably located outside the paint spraying room.

[0023] Preferably, the device further comprises a shot blasting machine, which is located at the side of the paint spraying room in the direction of the incoming steel plate, and is used for rust removal treatment on the surface of the steel plate.

[0024] Preferably, the device further comprises a drying room, which is located at the side of the paint spraying room in the direction of the outgoing steel plate, and is used for drying the steel plate after paint spraying; further, the paint spraying room is provided with an electric heating dryer and other necessary heating and drying equipment; the waste gas generated in the paint spraying room and the drying room is connected with an external waste gas treatment equipment to avoid direct emission to the external environment.

[0025] Preferably, the mounting shell is conical, and the tip of the mounting shell faces the side of the flow deflector in the outflow direction.

[0026] Advantages

[0027] Compared with the prior art, the present application provides an intelligent spraying device for a steel pretreatment line, which has the following advantages:

[0028] The intelligent spraying equipment of the steel pretreatment line, paint is injected into the nozzle through paint supply pipeline and hollow cavity after paint pump pressurizes the paint, paint forms paint mist after passing through the nozzle, the double shaft head motor drives the inclined blade turbine to rotate, the guide cover forms a cyclone, under the action of cyclone and gravity, the dispersed paint mist around the guide cover is concentrated to the middle part of the guide cover, so that the concentrated paint mist falls on the steel plate, at this time, negative pressure is generated in the inner cylinder, and the paint flying around the edge of the guide cover is sucked into the collecting cover and returned to the inner cylinder through the return pipe, most of the paint is sprayed out through the guide cover again, which can effectively reduce the scattering of paint, ensure the clean construction environment, reduce paint waste and be more environmentally friendly. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 It is a three-dimensional structure schematic diagram of the steel plate pretreatment line of the application.

[0030] Figure 2 It is a three-dimensional structure schematic diagram of the paint spraying room.

[0031] Figure 3 It is a top view plane structure schematic diagram of the paint spraying room.

[0032] Figure 4 It is a bottom view plane structure schematic diagram of the paint spraying room.

[0033] Figure 5 It is a three-dimensional structure schematic diagram of the paint spraying mechanism. Figure 4 It is a sectional structure schematic diagram of A-A in the paint spraying mechanism.

[0034] Figure 6 It is a sectional structure schematic diagram of B-B in the paint spraying mechanism. Figure 4

[0035] Figure 7 It is a three-dimensional structure schematic diagram of the paint spraying mechanism.

[0036] Figure 8 It is a bottom plane structure schematic diagram of the paint spraying mechanism.

[0037] Figure 9 It is a sectional structure schematic diagram of C-C in the paint spraying mechanism. Figure 8

[0038] Figure 10 It is a three-dimensional structure schematic diagram of the paint spraying mechanism from another perspective.

[0039] Figure 11 It is a sectional structure schematic diagram of D in the paint spraying mechanism. Figure 7

[0040] Figure 12 It is a three-dimensional structure schematic diagram of the collecting cover with arc-shaped flanging. ​​​

[0041] Marked in the drawing: 1, feeding roller; 2, paint spraying room; 3, paint spraying trolley; 4, transverse driving device; 5, paint spraying pump; 6, paint supply pipeline; 7, outer cylinder; 8, inner cylinder; 9, mounting shell; 10, double shaft head motor; 11, return pipe; 12, collecting cover; 13, hollow shaft; 14, inclined blade turbine; 15, nozzle; 16, guide vane; 17, driving ring frame; 18, rotary driving part; 19, driving handle; 20, inclined chute; 21, scraping part; 22, air inlet; 23, air volume adjusting valve; 24, paint basin; 25, exhaust pipe; 26, on-off valve; 27, paint film thickness detector; 28, shot blasting machine; 29, drying room; 30, arc-shaped flanging. DETAILED DESCRIPTION

[0042] In order to make the personnel in the technical field better understand the present application scheme, the technical scheme in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by the person skilled in the art without creative labor should belong to the protection scope of the present application.

[0043] It should be noted that the embodiments in the present application and the features and technical schemes in the embodiments can be combined with each other without conflict.

[0044] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0045] Please refer to Figures 1-10 An intelligent spraying equipment of a steel material pretreatment line, which comprises a feeding roller 1, a paint spraying room 2, a shot blasting machine 28 and a drying room 29, the feeding roller 1 is used for conveying the steel plate into the paint spraying room 2; the shot blasting machine 28 is located at one side of the steel plate feeding direction of the paint spraying room 2, and the shot blasting machine 28 is used for rust removal treatment of the surface of the steel plate; the drying room 29 is located at one side of the steel plate discharging direction of the paint spraying room 2, and the drying room 29 is used for drying the steel plate after spraying; further, a heating dryer and other necessary heating and drying equipment are installed in the paint spraying room 2; the waste gas generated in the paint spraying room 2 and the drying room 29 is connected with an external waste gas treatment equipment to avoid direct discharge to the external environment; the drying room 29 and the external waste gas treatment equipment can adopt the prior art.

[0046] Before the steel plate spraying operation, the steel plate is subjected to shot blasting rust removal treatment by the shot blasting machine 28, the outer wall of the steel plate subjected to shot blasting rust removal treatment by the shot blasting machine 28 forms uniform concave pits, so as to improve the adhesion performance of the subsequent paint, and the steel plate subjected to shot blasting treatment is steadily raised due to the friction force, which is beneficial to the volatilization of the volatile components in the paint; the steel plate subjected to paint spraying treatment enters the drying room 29 for drying treatment, and the paint volatilized waste gas generated in the paint spraying room 2 and the drying room 29 can be further treated by the external waste gas treatment equipment.

[0047] Specifically, the shot blasting machine 28 in the embodiment can adopt the shot blasting rust removal system disclosed in the steel plate pretreatment production line with the publication number CN201871449U, or other equivalent shot blasting rust removal equipment having the function of shot blasting rust removal treatment on the steel plate. Since it is the prior art structure, the structure and principle of the shot blasting machine 28 will not be further described here.

[0048] Please refer to Figures 2-6 The paint spraying room 2 is provided with a paint spraying trolley 3 slidingly installed therein, and is further provided with a transverse movement driver 4 for providing power for the sliding movement of the paint spraying trolley 3, a paint spraying pump 5, a paint supply pipeline 6 and a paint spraying mechanism installed on the paint spraying trolley 3. The transverse movement driver 4 can drive the paint spraying trolley 3 to move in the vertical direction of the steel plate running direction, so as to realize the overall spraying treatment of the steel plate.

[0049] The paint spraying room 2 is provided with a paint basin 24, and the bottom of the paint basin 24 is provided with a discharge pipe 25, and the discharge pipe 25 is provided with an on-off valve 26. Further, the paint basin 24 is installed on the side of the paint spraying room 2 far away from the steel plate, the height of the paint basin 24 is lower than the height of the paint spraying mechanism, and the paint basin 24 is provided with a position reaching switch, and the position reaching switch is signal connected with the transverse movement driver 4 through an external PLC system. When the position reaching switch detects that the paint spraying mechanism is located above the paint basin 24, the transverse movement driver 4 stops, so that the paint spraying mechanism stays above the paint basin 24.

[0050] The paint film thickness detector 27 is installed on the paint spraying trolley 3; further, the paint film thickness detector 27 is installed on the paint spraying trolley 3 and located on the side of the steel plate running direction of the paint spraying mechanism, the paint film thickness detector 27 is preferably a non-destructive magnetic thickness gauge, an eddy current thickness gauge or an ultrasonic thickness gauge, etc., the paint film thickness detector 27 can adopt a conventional product known on the market, and the structure and principle of the paint film thickness detector 27 are not further limited and described here; the paint film thickness detector 27 is signal connected with an external processor (computer or PLC control system) and a display, and an operator can read the paint spraying thickness of the steel plate in real time through the display; when the paint film thickness detector 27 detects that the paint spraying thickness of the steel plate is unqualified, the paint film thickness detector 27 transmits an electrical signal to the external processor, the signal is displayed at the display through the external processor and a warning is given, so that intelligent dynamic monitoring of the paint spraying of the steel plate is realized; it should be noted that if the paint film thickness detector 27 is installed in the paint spraying room 2, the detection end of the paint film thickness detector 27 needs to be cleaned regularly to avoid that the overspray coating adheres to the paint film thickness detector 27 and affects the detection accuracy of the paint spraying thickness of the steel plate; in order to reduce the influence of the overspray coating on the detection accuracy of the paint film thickness detector 27, the paint film thickness detector 27 is preferably located outside the paint spraying room 2, and a slot allowing the paint film thickness detector 27 to slide transversely is left on the paint spraying room 2, and a plastic rubber strip is used to seal the slot, and an opening allowing the paint film thickness detector 27 to slide is left on the plastic rubber strip.

[0051] The paint spraying mechanism comprises an outer cylinder 7, an inner cylinder 8 fixedly installed in the outer cylinder 7, a mounting shell 9 fixedly installed in the inner cylinder 8, a double-shaft head motor 10 fixedly installed in the mounting shell 9, a flow guide cover installed at the outflow end of the outer cylinder 7, a plurality of return pipes 11 and a collection cover 12, a hollow shaft 13 is rotatably installed on the double-shaft head motor 10, an inclined blade turbine 14 is fixedly installed at one end of the hollow shaft 13, a nozzle 15 is installed at the other end of the hollow shaft 13, a hollow cavity in communication with the input end of the nozzle 15 is arranged in the hollow shaft 13, one end of a paint supply pipeline 6 is in communication with the output end of a paint spraying pump 5, the other end of the paint supply pipeline 6 is in rotatable sealing communication with the hollow shaft 13, the collection cover 12 is arranged at the edge of the outflow end port of the flow guide cover, and one end of the return pipe 11 penetrates through the outer cylinder 7 and extends into the inner cylinder 8.

[0052] Further, the transverse driver 4 is preferably a mechanical slide, and other drivers with driving the paint spraying trolley 3 sliding can also be used. The mechanical slide is equipped with a piano cover and a Siemens servo motor to drive the paint spraying trolley 3; the center axes of the outer cylinder 7, the inner cylinder 8, the double shaft head motor 10 and the fairing coincide; the fairing can be a cylindrical cover or a conical cover; the annular air inlet channel is formed between the mounting shell 9 and the inner cylinder 8, and the inclined blade turbine 14 is installed at the joint of the inner cylinder 8 and the mounting shell 9, which is used to form a rotational flow after pressurizing the airflow in the inner cylinder 8; the paint supply pipeline 6 is rotatably connected with the hollow shaft 13 through a rotating sealing joint; the input end of the paint spraying pump 5 extends into the external paint supply cylinder; the plurality of return pipes 11 are circumferentially and uniformly distributed around the collecting cover 12; the outer cylinder 7 is provided with a mounting flange, and the mounting flange is fixedly connected with the paint spraying trolley 3 through bolts.

[0053] The paint supply pipeline 6 is made of flexible plastic pipe, and a hanging beam is fixedly installed in the paint spraying room 2. A plurality of hanging hooks are slidably installed on the hanging beam, and the paint supply pipeline 6 is fixedly installed on each hanging hook. In this way, the paint supply pipeline 6 can be prevented from falling too much to interfere with the movement of the paint spraying trolley 3. In this embodiment, the inner diameter of the collecting cover 12 is slightly larger than the maximum outer diameter of the bottom of the fairing.

[0054] Specifically, please refer to Figure 8 , the plurality of nozzles 15 are circumferentially and uniformly distributed around the hollow shaft 13, and the outlet ends of the plurality of nozzles 15 are away from the center axis of the hollow shaft 13; further, the outlet ends of the nozzles 15 are at least 2 cm away from the center axis of the hollow shaft 13.

[0055] Specifically, please refer to Figure 9 , the mounting shell 9 is conical, and the tip of the mounting shell 9 is directed to the outflow direction of the fairing.

[0056] Specifically, please refer to Figure 7 , Figure 9 and Figure 11 , the inner cylinder 8 is provided with a plurality of air inlets 22, and the air inlets 22 are provided with air volume adjusting valves 23; further, the air volume adjusting valves 23 are preferably petal type air adjusting valves (for details, please refer to Figure 11), the petal-type air regulating valve comprises a valve body, a plurality of arc-shaped valve plates rotatably installed in the valve body, and a connecting rod synchronous driving member for providing power for the rotation of the arc-shaped valve plates. The plurality of valve plates completely seal the valve body after being closed. The valve plates are driven to rotate by the connecting rod synchronous driving member, so that the spacing between adjacent two valve plates changes, thereby adjusting the air volume entering the inner cylinder 8. The air volume adjusting valve 23 can also be a butterfly valve, a gate valve or other equivalent valve with air volume adjusting effect. By opening each air volume adjusting valve 23, the negative pressure in the inner cylinder 8 can be adjusted, so that too much paint mist does not enter the inner cylinder 8 through the collection cover 12 and the return pipe 11 due to excessive negative pressure in the inner cylinder 8, and the negative pressure value at the collection cover 12 is prevented from being too large to interfere with the paint mist rotation in the flow guide cover.

[0057] When the steel plate enters the paint spraying room 2, the flow guide cover is located above the steel plate, and a spacing of at least 10 cm should be left between the flow guide cover and the steel plate. In order to adjust the distance between the paint spraying mechanism and the steel plate, an adjusting screw and nut or other lifting adjusting mechanism can be installed on the paint spraying trolley 3.

[0058] The installation shell 9 adopts a conical head shape, which can avoid interfering with the paint mist rotation in the flow guide cover. The conical head structure is located in the middle of the paint mist rotation, which can reduce the adhesion of paint mist at the installation shell 9. A plurality of nozzles 15 are used to atomize and spray paint, which can further improve the uniformity of paint distribution. The hollow shaft 13 rotates to drive the nozzles 15 to rotate, providing the paint mist sprayed by the nozzles 15 with a rotational initial speed, further improving the rotation effect of the paint mist, and promoting the paint mist to be sprayed onto the surface of the steel plate after gathering.

[0059] It should be noted that in the non-paint spraying state of the equipment, the bottom of the collection cover 12 can be sealed by a containing disc containing corresponding paint thinner, each air volume adjusting valve 23 is closed, the air inlet 22 is in a sealed state, and the double-shaft head motor 10 is turned on. The paint thinner volatilizes and circulates in the collection cover 12, the return pipe 11, the inner cylinder 8 and the flow guide cover. The thinner can dilute and clean the paint adhered to the inside of the paint spraying mechanism, and the cleaned paint dirt falls into the containing disc. After the equipment is finished, at least one cleaning is performed, and the inside of the paint spraying mechanism can also be cleaned regularly according to the needs.

[0060] In another embodiment, when the flow guide cover is of a fixed size, in order to prevent paint dripping during spraying, an arc-shaped flange 30 with an inner diameter slightly smaller than the outer diameter of the flow guide cover can be arranged at the bottom of the collection cover 12 (for details, refer to Figure 12The size of the edge of the arc-shaped flange 30 extending into the fairing should not be greater than 0.5 mm to avoid interference with the outflow of the airflow in the fairing, and the inner wall of the arc-shaped flange 30 is inclined upward to the center of the fairing. The arc-shaped flange 30 and the collecting cover 12 collect the paint dripping along the inner wall of the fairing and the inner wall of the return pipe 11 during the spraying operation to prevent the paint from dripping onto the steel plate and prolong the internal cleaning interval of the paint spraying mechanism.

[0061] Specifically, please refer to Figures 7-10 The fairing includes a plurality of guide vane plates 16 hingedly mounted on the outflow end of the inner cylinder 8, a driving ring frame 17 rotatably mounted on the outside of the outer cylinder 7, and a rotary drive 18 for providing power for the rotation of the driving ring frame 17. The guide vane plate 16 is provided with a driving handle 19, and the driving ring frame 17 is provided with a plurality of inclined sliding grooves 20 arranged along the axial direction of the driving ring frame 17. The driving handle 19 extends into the corresponding inclined sliding groove 20. Further, the rotary drive 18 is preferably a telescopic cylinder, which can be an electric cylinder, a pneumatic cylinder or a hydraulic cylinder. One end of the telescopic cylinder is hingedly connected to the outer wall of the inner cylinder 8, and the other end of the telescopic cylinder is hingedly connected to the driving ring frame 17. The rotary drive 18 can also use a brake motor and a driving wheel. The driving wheel is fixedly installed on the output end of the brake motor and is in transmission connection with the driving ring frame 17. The rotary drive 18 can also use other equivalent components that can drive the driving ring frame 17 to rotate reciprocatingly.

[0062] Specifically, please refer to Figures 7-10 The guide vane plate 16 is a V-shaped bent plate, and adjacent two V-shaped bent plates are overlapped with each other. A scraping member 21 is mounted on the V-shaped bent plate, and the scraping member 21 is provided with an opening allowing the adjacent group of V-shaped bent plates to pass through. Further, the plurality of V-shaped bent plates are overlapped with each other in a clockwise direction or a counterclockwise direction. The overlapping mode of the V-shaped bent plates should be consistent with the direction of the rotational flow in the fairing (for details, please refer to the arrow rotation direction in Figure 8 ). In this way, the amount of paint adhering to the junction of the V-shaped bent plates is reduced. The V-shaped bent plate is made of a plastic plate or a thin-walled metal plate with a certain plasticity to ensure that the adjacent two V-shaped bent plates are tightly overlapped with each other. The scraping member 21 is parallel to the V-shaped bent plate, and the scraping member 21 is made of a hard rubber material with a certain plasticity. The inner wall of the opening is in close contact with the inner wall of the corresponding V-shaped bent plate.

[0063] Under the same pressure, different paints sprayed through the nozzle 15 have different paint mist ranges. By starting the rotary drive 18, the rotary drive 18 drives the driving ring frame 17 to rotate, the driving handle 19 slides in the inclined sliding groove 20, and the driving handle 19 drives the guide vane plate 16 to rotate around the hinge point during the up-and-down movement of the driving handle 19. Each guide vane plate 16 is gathered or separated from each other to adjust the size of the internal space of the fairing, thereby adjusting the spraying range of the paint mist in the fairing and adjusting the degree of concentration of the paint mist to meet the use requirements of multiple working conditions.

[0064] When the paint is gathered on the inner wall of the fairing, there is a risk of dripping, which affects the spraying quality of the steel plate. Therefore, after one or more reciprocating spraying operations of the spraying mechanism, the spraying mechanism is stopped above the paint basin 24 under the drive of the transverse drive 4. The rotating drive 18 drives the driving ring frame 17 to rotate. After transmission through the driving handle 19, each guide vane 16 is synchronously gathered to one side of the center of the fairing around the hinge point. One group of V-shaped bent plates scrapes the paint attached to the bending surface of the adjacent group of V-shaped bent plates. The scraped paint is gathered at the vertical edge of the V-shaped bent plate. The paint slides along the vertical edge of the corresponding V-shaped bent plate. The paint attached to the other bending surface of the V-shaped bent plate is scraped by the scraper 21. The gathered paint forms liquid drops along the vertical edge of the scraper 21. After the gathering of each guide vane 16, a constricted horn-shaped opening is formed. The air volume adjusting valve 23 at each air inlet 22 is in a fully open state. By starting the double-shaft motor 10, the wind pressure generated in the fairing blows the paint drops away. The liquid drops are collected in the paint basin 24. By opening the switch valve 26, the paint collected in the paint basin 24 is discharged through the discharge pipe 25 and then collected.

[0065] The use process of the intelligent spraying equipment of the steel material pretreatment line provided by the application is as follows: the steel plate is conveyed to the shot blasting machine 28 through the feeding roller way 1. After the shot blasting machine 28 performs shot blasting rust removal treatment on the steel plate, the steel plate is sent into the paint spraying room 2. The paint spraying pump 5 pressurizes the paint and then injects the paint into the nozzle 15 through the paint supply pipeline 6 and the hollow cavity. The double-shaft motor 10 drives the inclined blade turbine 14 and each nozzle 15 to rotate. The paint forms paint mist after passing through the nozzle 15 and is sprayed out. The paint mist has a rotating initial speed and forms a rotating flow in the fairing under the action of the inclined blade turbine 14. Under the action of the rotating flow and gravity, the paint mist dispersed in the surrounding is concentrated in the middle part of the fairing. The paint mist is then dropped on the steel plate. At this time, negative pressure is generated in the inner cylinder 8. A small part of paint flying away from the periphery of the fairing is sucked into the collecting cover 12 and then reflows into the inner cylinder 8 through the return flow pipe 11. Most of the paint is sprayed out of the fairing again. The transverse drive 4 drives the paint spraying mechanism to reciprocate in the paint spraying room 2, so that the top end surface of the steel plate is fully sprayed and treated. The sprayed steel plate enters the drying room 29 to perform drying treatment, and the spraying operation of the steel plate is completed.

[0066] In the application, unless otherwise clearly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense. For example, it can be fixed connection, or detachable connection, or integrated; it can be mechanical connection, or electrical connection, or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For ordinary skilled in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

Claims

1. An intelligent spraying device of a steel material pretreatment line, comprising a feeding roller way (1) and a paint spraying room (2), the feeding roller way (1) being used for conveying a steel plate into the paint spraying room (2); characterized in that, Also include a paint spraying trolley (3) slidingly mounted in the paint spraying room (2), a transverse drive (4) providing power for the sliding of the paint spraying trolley (3), a paint spraying pump (5), a paint supply pipeline (6) and a paint spraying mechanism mounted on the paint spraying trolley (3), the paint spraying mechanism comprising an outer cylinder (7), an inner cylinder (8) fixedly mounted in the outer cylinder (7), a mounting shell (9) fixedly mounted in the inner cylinder (8), a double-shaft head motor (10) fixedly mounted in the mounting shell (9), a flow guide cover mounted at the outflow end of the outer cylinder (7), a plurality of return pipes (11) and a collection cover (12), a hollow shaft (13) being rotatably mounted on the double-shaft head motor (10), an inclined blade turbine (14) being fixedly mounted at one end of the hollow shaft (13), a nozzle (15) being mounted at the other end of the hollow shaft (13), a hollow cavity being provided in the hollow shaft (13) and being in communication with the input end of the nozzle (15), one end of the paint supply pipeline (6) being in communication with the output end of the paint spraying pump (5), the other end of the paint supply pipeline (6) being in rotatable sealing communication with the hollow shaft (13), the collection cover (12) being provided at the edge of the outflow end port of the flow guide cover, one end of the return pipe (11) extending through the outer cylinder (7) and extending into the inner cylinder (8); The flow guide cover comprises a plurality of flow guide leaf plates (16) hingedly mounted at the outflow end of the inner cylinder (8), a drive ring frame (17) rotatably mounted on the outside of the outer cylinder (7) and a rotary drive member (18) providing power for the rotation of the drive ring frame (17), the flow guide leaf plate (16) being provided with a drive handle (19), the drive ring frame (17) being provided with a plurality of inclined sliding grooves (20) arranged obliquely along the axial direction of the drive ring frame (17), the drive handle (19) extending into the corresponding inclined sliding groove (20). The flow guide leaf plate (16) adopts a V-shaped bent plate, and adjacent two V-shaped bent plates are overlapped with each other, and a scraping member (21) is mounted on the V-shaped bent plate, and the scraping member (21) is provided with an opening allowing adjacent one group of V-shaped bent plates to pass through.

2. The intelligent painting apparatus of a steel material pretreatment line according to claim 1, characterized by, A plurality of air inlets (22) are provided on the inner cylinder (8), and an air volume adjusting valve (23) is mounted on the air inlet (22).

3. The intelligent painting apparatus of a steel material pretreatment line according to claim 1, characterized by, A paint basin (24) is mounted in the paint spraying room (2), and a discharge pipe (25) is provided at the bottom of the paint basin (24), and an on-off valve (26) is mounted on the discharge pipe (25).

4. The intelligent painting apparatus of a steel material pretreatment line according to claim 1, characterized by, The nozzle (15) is a plurality of nozzles (15) which are uniformly distributed around the hollow shaft (13) in the circumferential direction, and the outflow ends of the plurality of nozzles (15) are away from the central axis of the hollow shaft (13).

5. The intelligent painting apparatus of a steel material pretreatment line according to claim 1, characterized by, A paint film thickness detector (27) is mounted on the paint spraying trolley (3).

6. The intelligent painting apparatus of a steel material pretreatment line according to claim 1, wherein A shot blasting machine (28) is also included, which is located on the side of the paint spraying room (2) in the direction of the incoming steel plate, and is used for rust removal treatment on the surface of the steel plate.

7. The intelligent painting apparatus of a steel material pretreatment line according to claim 1, wherein An oven (29) is also included, which is located on the side of the paint spraying room (2) in the direction of the outgoing steel plate, and is used for drying the steel plate after painting.

8. The intelligent painting apparatus of a steel material pretreatment line according to claim 1, characterized by, The mounting shell (9) is conical, and the tip of the mounting shell (9) is directed to the outflow direction of the flow guide cover.

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