CN116140088B - Continuous powder feeding device for spraying - Google Patents
Continuous powder feeding device for spraying Download PDFInfo
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- CN116140088B CN116140088B CN202310408766.2A CN202310408766A CN116140088B CN 116140088 B CN116140088 B CN 116140088B CN 202310408766 A CN202310408766 A CN 202310408766A CN 116140088 B CN116140088 B CN 116140088B
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- powder feeding
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B7/00—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas
- B05B7/14—Spraying apparatus for discharge of liquids or other fluent materials from two or more sources, e.g. of liquid and air, of powder and gas designed for spraying particulate materials
- B05B7/1404—Arrangements for supplying particulate material
- B05B7/1431—Arrangements for supplying particulate material comprising means for supplying an additional liquid
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B12/00—Arrangements for controlling delivery; Arrangements for controlling the spray area
- B05B12/08—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means
- B05B12/084—Arrangements for controlling delivery; Arrangements for controlling the spray area responsive to condition of liquid or other fluent material to be discharged, of ambient medium or of target ; responsive to condition of spray devices or of supply means, e.g. pipes, pumps or their drive means responsive to condition of liquid or other fluent material already sprayed on the target, e.g. coating thickness, weight or pattern
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/40—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths
- B05B14/48—Arrangements for collecting, re-using or eliminating excess spraying material for use in spray booths specially adapted for particulate material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B16/00—Spray booths
- B05B16/40—Construction elements specially adapted therefor, e.g. floors, walls or ceilings
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Application Of Or Painting With Fluid Materials (AREA)
Abstract
The invention discloses a continuous powder feeding device for spraying, which belongs to the field of powder feeding equipment for spraying, and is provided with: the automatic spraying device comprises a storage table, a remote control vehicle, a spraying powder feeder shell, a powder storage tank detection device, a powder inlet channel, a powder outlet channel, a powder feeding rotating wheel, an air source device, a spraying gun, an air speed flow monitor, a coating thickness detector, an infrared range finder, a remote control vehicle powder return pipe, a powder storage tank air extractor, a storage table rotating frame, a storage table protecting cover, a storage table powder return pipe, an intelligent camera, a central control system, a compressed air flow rate provided by the air source device, and an air flow rate in the powder outlet channel, wherein the air flow rate in the powder outlet channel is controlled by the central control system, the powder feeding flow rate is controlled by controlling the powder feeding rotating wheel, and the central control system can formulate different spraying schemes according to data information returned by the intelligent camera, so that the continuity of spraying work is ensured, the efficiency and quality in spraying work are balanced, raw material of spraying powder is saved, and the air environment is effectively prevented from being polluted by spraying powder.
Description
Technical Field
The invention relates to the field of powder feeding equipment for spraying, in particular to a continuous powder feeding device for spraying.
Background
The powder feeding device for spraying adopts the technology that powder is uniformly conveyed into a spraying spray gun and is sprayed onto the surface of a substrate under the acceleration action of the spray gun to realize the spraying process, and the powder feeding device for spraying is used as a technology which has the most potential and is very focused in the field of surface coating, and currently, the powder feeding device for a conventional spraying system performs full-coverage saturated spraying work on a spraying object through a plurality of spraying guns.
The invention of Chinese patent publication No. CN114308435A discloses a spraying powder feeding device, which comprises a conveying mechanism and a powder feeding mechanism; a feeding cavity with a discharge hole is formed in the conveying mechanism, a conveying piece for conveying powder is arranged in the feeding cavity, and the conveying piece moves the powder towards the direction of the discharge hole in a moving or rotating mode so as to convey the powder to the discharge hole; the powder feeding mechanism comprises a powder distribution disc, a powder feeding channel communicated with the outside is formed in the powder distribution disc, at least part of the powder distribution disc is positioned in the powder feeding channel, and the powder distribution disc is positioned below the discharge hole; the surface of cloth powder dish evenly lays a plurality of air vents to make the air current that flows through the powder feed channel pass the air vent and blow the powder on cloth powder dish surface to the external world, this spraying powder feed device realizes at the uniform velocity powder feed through setting up the conveying piece, and cloth powder dish at least partially sets up in the powder feed channel, and the surface has the air vent, can take away the powder on surface at the uniform velocity, has avoided the uneven condition of powder feed and powder feed discontinuity that superfine powder can appear.
The intelligent camera, the wind speed flow monitor and the infrared range finder are not arranged in the device, the spraying diffusivity of a spraying gun mouth cannot be determined according to the volume of a spraying object, the working parameters of the spraying device cannot be timely adjusted according to the color difference problem of the spraying object, the adaptability to different types of spraying powder and the spraying object is poor, the purpose of continuous work cannot be achieved, and the spraying working efficiency is reduced.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a continuous powder feeding device for spraying, which solves the problems that the working parameters of a spraying device cannot be timely adjusted according to the chromatic aberration problem of a spraying object in the prior art, and the adaptability to different types of spraying powder and the spraying object is poor.
In order to achieve the above purpose, the present invention provides the following technical solutions: the continuous powder feeding device for spraying comprises a storage table, a remote control car, a wireless radio connection device and a control device,
the spraying powder feeder shell is arranged on the remote control car and used for fixing all parts of the device;
the powder outlet channel is arranged at the left side of the inner part of the spraying powder feeding machine shell and is used as an output channel of spraying powder;
the powder inlet channel is arranged on the right side inside the spraying powder feeder shell, and the upper part of the powder inlet channel is communicated with the lower part of the powder storage tank;
the powder feeding rotating wheel is arranged inside the spraying powder feeder shell, and an external cylindrical movable space where the powder feeding rotating wheel is positioned is communicated with the powder inlet channel and the powder outlet channel and is used for controlling the powder outlet quantity;
the air source device is arranged at the upper part of the spraying powder feeder shell, is communicated with the upper part of the powder outlet channel and is used for providing compressed gas;
the spraying gun is communicated with the lower part of the powder outlet channel;
the air speed and flow monitor is arranged on the spray gun and is used for detecting the air speed and the powder spraying and feeding flow at the outlet of the spray gun;
the coating thickness detector is fixed at the upper part of the spraying gun and is used for measuring the thickness of the sprayed coating;
the infrared range finder is fixed at the front end of the remote control car and is positioned at the lower part of the spraying gun and used for measuring the distance between the remote control car and the object placing table;
the object placing table rotating frame is arranged on the object placing table and used for controlling the position of a spraying object;
the intelligent camera is arranged on the object placing table and used for judging the volume of a spraying object;
the central control system is arranged at the tail part of the remote control vehicle, and is connected with the remote control vehicle, the powder feeding rotating wheel, the air source device, the air speed and flow monitor, the coating thickness detector, the infrared range finder and the spraying gun through signal transmission lines, and is connected with the object placing table rotating frame and the intelligent camera through radio signals; the central control system controls the rotation speed of the powder feeding rotating wheel so as to control the powder feeding quantity of the device, controls the air flow speed in the powder discharging channel by controlling the compressed air flow rate provided by the air source device, and can formulate different spraying schemes according to the data information returned by the intelligent camera.
Further, the continuous powder feeding device for spraying further comprises a powder storage tank which is arranged at the upper part of the shell of the powder feeding machine for spraying and is used for storing raw materials of spraying powder;
the powder storage tank detection device is fixed on the spraying powder feeder shell, is connected with the bottom of the powder storage tank, is connected with the central control system through a signal transmission line, and can acquire the pressure change condition of the powder storage tank in spraying work;
the powder return pipe of the remote control car is arranged in the remote control car, the lower end of the powder return pipe is communicated with the lower end of the powder inlet channel, and the upper end of the powder return pipe is communicated with the powder storage tank;
the powder storage tank air extractor is arranged at the joint of the powder storage tank and the remote control car powder return pipe, is connected with the central control system through a signal transmission line and is used for extracting spraying powder recovered in the remote control car powder return pipe;
the object placing table protection cover is arranged on the object placing table and used for preventing spraying powder from diffusing;
the object placing table powder returning pipe is arranged on the object placing table and used for recovering the falling spraying powder during spraying.
Further, the central control system controls the remote control vehicle to move to the front of the object placing table, and controls the remote control vehicle to conduct position fine adjustment according to the distance between the remote control vehicle and the object placing table, which is measured by the infrared distance meter, and enables the object placing table powder return pipe to be in butt joint with the remote control vehicle powder return pipe;
the central control system is internally provided with a powder feeding flow value M, wherein M=Nxq x a x ρ is set, N is the rotating speed of the powder feeding rotating wheel, q is the number of grooves of the powder feeding rotating wheel, a is the volume of spraying powder which can be loaded in a single powder feeding rotating wheel groove, ρ is the stacking density of the spraying powder in the powder feeding rotating wheel groove, and in an initial state, M=m1 is set, wherein M1 is the powder feeding flow in the initial state;
setting n=n1, wherein N1 is the rotating speed of the powder feeding rotating wheel in the initial state;
the central control system is internally provided with an air source device output air speed Vs, and in an initial state, the central control system controls the powder feeding rotating wheel to start to operate at the rotating speed of n1 and controls the air source device to supply air at the output air speed of Vs1, and spraying work is started.
Further, the intelligent camera monitors the color difference of the outer surface of the spraying object in real time and transmits the color difference beta of the outer surface of the spraying object to the central control system,
the central control system is internally provided with a chromatic aberration allowable value beta 0,
if beta is less than or equal to beta 0, the central control system judges that the spraying work is normal, and signals are not sent out;
if beta is larger than beta 0, the central control system judges that the spraying work is abnormal, and controls the rotating frame of the object placing table to operate, so that the spraying gun performs spraying color difference compensation on the position area with color difference;
after the spray coating color difference compensation is carried out on the position area with the color difference, the central control system controls the wind speed flow monitor to detect the wind speed Ve at the outlet of the spray coating gun;
if Ve is smaller than KXVs, the central control system judges that the powder outlet channel is blocked, and sends a command for cleaning the powder outlet channel to a manager;
if Ve is more than or equal to KXVs, the central control system judges that the powder outlet channel is smooth, and signals are not sent out temporarily;
and K is a wind speed damage coefficient arranged in the central control system.
Further, the suspension speed vt of the different types of spraying powder and the actual spraying wind speed proportion Z of the different types of spraying powder are arranged in the powder, and the corresponding suspension speed and the actual spraying wind speed proportion can be selected according to the types of the spraying powder;
after the central control system judges that the powder outlet channel is unobstructed, the suspension speed vt of the spraying powder is compared with the wind speed Ve at the outlet of the spraying gun,
if Ve is more than or equal to Z multiplied by vt, the central control system judges that the wind speed provided by the air source device reaches the standard;
if Ve is smaller than Z×vt, the central control system judges that the wind speed provided by the air source device does not reach the standard, and the central control system assigns a value to the output wind speed Vs of the air source device, and sets Vs=Z×vt/K.
Further, a reasonable conversion coefficient alpha of the wind speed powder quantity is arranged in the central control system, and n×q×a×ρ=α×vs, namely m=α×vs is set;
after judging that the wind speed provided by the air source device reaches the standard, the central control system controls the wind speed flow monitor to detect the spraying powder feeding flow Me at the outlet of the spraying gun,
if Me is less than m1, the central control system determines that powder accumulation occurs in the powder channel and sends a command for cleaning the powder outlet channel to a manager;
if me=m1, the central control system determines that powder accumulation does not occur in the powder channel, assigns a value to the rotating speed N of the powder feeding rotating wheel, and sets n= [ α× (vt/K) ]/(q×a×ρ), and at this time, the central control system pre-determines the powder feeding flow My of the current device, where my=α× (vt/K);
when the actual value Me of the spraying powder feeding flow at the outlet of the spraying gun is equal to the powder feeding flow m1 in the initial state by the comparison calculation of the central control system, the powder accumulation in the powder feeding channel can be judged, so that the rotation speed of the powder feeding rotating wheel calculated by the central control system according to the suspension speed of spraying powder can be adjusted, the rotation speed N of the powder feeding rotating wheel matched with the wind speed in the powder feeding channel is obtained, and the My is a preset value of the powder feeding flow after the rotation speed N of the powder feeding rotating wheel is adjusted by the central control system.
After the central control system assigns the rotating speed N of the powder feeding rotating wheel, the wind speed and flow monitor is controlled again to detect the powder feeding flow Me' at the outlet of the spraying gun,
if Me' =my, the central control system determines that the rotating speed of the powder feeding rotating wheel can provide expected powder feeding flow for spraying of the device;
if Me '< My, the central control system judges that the rotating speed of the powder feeding rotating wheel is too small, and changes the rotating speed of the powder feeding rotating wheel to N', and sets N '=N× (My/Me').
In particular, the central control system compares the thickness L of the sprayed coating in the current spraying area measured by the coating thickness detector with the required thickness L0 of the coating preset by the central control system,
if L is less than L0, the central control system judges that the coating in the current area is insufficient, and signals are not sent out;
if l=l0, the central control system determines that the spraying of the current area is completed, and controls the rotating frame of the object placing table to operate, so that the spraying gun is aligned to the next target spraying position for spraying.
In particular, the smart camera is capable of detecting the volume U of the spray object and uploading the volume data to the central control system,
the central control system can control the diffusivity F of the spraying gun, and F=G×U is set, wherein G is a proportional coefficient of the spraying volume and the muzzle diffusivity arranged in the central control system;
for the volume U of the spraying object, the central control system is provided with a first preset volume U1 and a second preset volume U2,
if U is less than or equal to U1, g=g1;
if U1 is less than or equal to U2, g=g2;
if U > U2, g=g3;
wherein G1 is a first preset value of a proportional coefficient of the spraying volume and the muzzle diffusance; g2 is a second preset value of the proportional coefficient of the spraying volume and the muzzle diffusance; g3 is a third preset value of the proportional coefficient of the spray volume and the muzzle diffusivity, and G1 is smaller than G2 and smaller than G3.
Furthermore, the powder storage tank detection device can detect the pressure value Y of the powder storage tank in real time and upload the pressure value Y into the central control system when the device is operated,
if the pressure value Y is continuously reduced in the operation of the device, the central control system judges that the powder storage tank is open and temporarily does not send out a signal;
if the pressure value Y is unchanged or becomes larger in the operation of the device, the central control system judges that the powder storage tank port is blocked and sends a command for cleaning the powder storage tank port to a manager;
in the preparation work before the spraying work is started, the remote control car powder return pipe is in butt joint with the object placing table powder return pipe, and after the spraying work is started, the central control system controls the air extractor of the powder storage tank to be started;
the powder storage tank air extractor extracts the spraying powder which cannot be attached to a spraying object in the object placing table through the object placing table powder return pipe, extracts the spraying powder which does not enter the powder outlet channel in the powder inlet channel through the remote control car powder return pipe, and recovers the extracted spraying powder to the powder storage tank.
Further, the powder feeding rotating wheel groove on the powder feeding rotating wheel is in a hook shape, and the direction of the hook shape is the same as the rotating direction of the powder feeding rotating wheel;
the object placing table protecting cover is provided with a sealing clamping groove which can be connected with the clamping groove on the spraying powder feeder shell in preparation before the spraying work starts, so that spraying powder which cannot be attached to a spraying object in the object placing table protecting cover is prevented from being diffused into the air.
Compared with the prior art, the invention has the beneficial effects that: according to the intelligent spray gun, the intelligent camera, the wind speed flow monitor and the infrared range finder are arranged, so that the spray diffusivity of the spray gun opening is determined according to the volume of a spray object, the working parameters of the spray device are timely adjusted according to the color difference problem of the spray object, the adaptability to different types of spray powder and spray objects is high, the purpose of continuous work can be achieved, and the spray working efficiency is improved.
The central control system can acquire powder output information by setting the powder feeding flow value, so that the coordination work of all parts is facilitated;
in the spraying process, the thickness of the coating is monitored in real time by arranging an infrared range finder, the powder outlet flow is controlled, the waste of raw materials is greatly reduced, and the thickness uniformity of the coating is effectively ensured;
by arranging the wind speed and flow monitor at the outlet of the spraying gun, the central control system can timely detect the problem of blockage of the powder channel and inform a manager to perform cleaning work, so that the spraying work efficiency is ensured and equipment damage is prevented;
the central control system compares the air speed at the outlet of the spraying gun with the suspension speed of the spraying powder, and timely adjusts the output air speed of the air source device, so that the spraying powder can be in a suspension state in the powder outlet channel, and the condition of powder accumulation in the powder outlet channel is avoided;
the central control system effectively improves the cooperative dispatching of the powder feeding rotating wheel and the air source device by taking the suspension speed of the sprayed powder as the basis of the rotating speed adjustment of the powder feeding rotating wheel, avoids the waste of raw materials and ensures the efficiency of powder spraying work.
Drawings
Fig. 1 is a schematic structural view of a continuous powder feeder for spraying according to an embodiment of the present invention.
Detailed Description
In order that the objects and advantages of the invention will become more apparent, the invention will be further described with reference to the following examples; it should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that, in the description of the present invention, terms such as "upper," "lower," "left," "right," "inner," "outer," and the like indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a continuous powder feeding device for spraying according to an embodiment;
the invention provides a continuous powder feeding device for spraying, which comprises a storage platform, a remote control car 1, a wireless radio connection between the remote control car 1 and the storage platform,
a spraying powder feeder housing 2 which is arranged on the remote control car 1 and is used for fixing all parts of the device;
a powder outlet channel 6 which is arranged at the left side in the spraying powder feeder housing 2 and is used as an output channel of spraying powder;
the powder inlet channel 5 is arranged on the right side in the spraying powder feeder shell 2, and the upper part of the powder inlet channel is communicated with the lower part of the powder storage tank 3;
the powder feeding rotary wheel 7 is arranged inside the spraying powder feeding machine shell 2, and an external cylindrical movable space where the powder feeding rotary wheel 7 is positioned is communicated with the powder feeding channel 5 and the powder discharging channel 6 and is used for controlling the powder discharging amount;
the air source device 8 is arranged at the upper part of the spraying powder feeder shell 2 and is communicated with the upper part of the powder outlet channel 6, and is used for providing compressed air;
a spray gun 9 which is communicated with the lower part of the powder outlet channel 6;
the air speed flow monitor 10 is arranged on the spray gun 9 and is used for detecting the air speed and the spray powder feeding flow at the outlet of the spray gun 9;
a coating thickness detector 11 fixed to the upper part of the spray gun 9 for measuring the thickness of the sprayed coating;
the infrared range finder 12 is fixed at the front end of the remote control car 1 and positioned at the lower part of the spraying gun 9 and is used for measuring the distance between the remote control car 1 and the object placing table;
a table rotating frame 15 provided on the table for controlling the position of the object to be sprayed;
an intelligent camera 18, which is arranged on the object placing table and is used for judging the volume of the spraying object;
the central control system 19 is arranged at the tail part of the remote control car 1, and is connected with the remote control car 1, the powder feeding rotating wheel 7, the air source device 8, the air speed flow monitor 10, the coating thickness detector 11, the infrared range finder 12 and the spraying gun 9 through signal transmission lines, and is connected with the object placing table rotating frame 15 and the intelligent camera 18 through radio signals; the central control system 19 controls the rotation speed of the powder feeding rotating wheel 7 so as to control the powder feeding amount of the device, controls the air flow speed in the powder discharging channel 6 by controlling the flow speed of compressed air provided by the air source device 8, and the central control system 19 can formulate different spraying schemes according to the data information returned by the intelligent camera 18.
Further, the continuous powder feeding device for spraying further comprises a powder storage tank 3 which is arranged at the upper part of the spraying powder feeding machine shell 2 and is used for storing spraying powder raw materials;
the powder storage tank detection device 4 is fixed on the spraying powder feeder shell 2, is connected with the bottom of the powder storage tank 3, is connected with the central control system 19 through a signal transmission line, and can acquire the pressure change condition of the powder storage tank 3 in spraying operation;
the remote control car powder return pipe 13 is arranged in the remote control car 1, the lower end of the remote control car powder return pipe is communicated with the lower end of the powder inlet channel 5, and the upper end of the remote control car powder return pipe is communicated with the powder storage tank 3;
the powder storage tank air extractor 14 is arranged at the joint of the powder storage tank 3 and the remote control car powder return pipe 13, is connected with the central control system 19 through a signal transmission line and is used for extracting the spraying powder recovered in the remote control car powder return pipe 13;
a table protection cover 16 provided on the table for preventing the spread of the spray powder;
the object placing table powder returning pipe 17 is arranged on the object placing table and is used for recovering the spraying powder falling during spraying.
Further, the central control system 19 controls the remote control car 1 to move to the front of the object placing table, and controls the remote control car 1 to perform fine adjustment on the position according to the distance between the remote control car 1 and the object placing table measured by the infrared range finder 12, so that the object placing table powder return pipe 17 is in butt joint with the remote control car powder return pipe 13;
the central control system 19 is internally provided with a powder feeding flow value M, wherein m=n×q×a×ρ is set, N is the rotation speed of the powder feeding rotating wheel 7, q is the number of grooves of the powder feeding rotating wheel 7, a is the volume of the spraying powder which can be loaded in a single powder feeding rotating wheel groove, ρ is the stacking density of the spraying powder in the powder feeding rotating wheel groove, and m=m1 is set in an initial state, wherein M1 is the powder feeding flow in the initial state;
setting n=n1, wherein N1 is the rotating speed of the powder feeding rotating wheel 7 in the initial state;
the central control system 19 is internally provided with an air source device 8 for outputting an air speed Vs, the central control system 19 controls the powder feeding rotating wheel 7 to start running at the rotating speed of n1 in an initial state of Vs=v1, and controls the air source device 8 to supply air at the output air speed of Vs1, so that spraying work is started.
Further, the intelligent camera 18 monitors the external surface color difference of the spraying object in real time, and transmits the external surface color difference beta of the spraying object to the central control system 19,
the central control system 19 is internally provided with a chromatic aberration allowable value beta 0,
if beta is less than or equal to beta 0, the central control system 19 judges that the spraying work is normal, and signals are not sent out;
if beta is larger than beta 0, the central control system 19 judges that the spraying work is abnormal, and controls the rotating frame 15 of the object placing table to operate, so that the spraying gun 9 performs spraying color difference compensation on the position area with color difference;
after the spray coating color difference compensation is performed on the position area with the color difference, the central control system 19 controls the wind speed flow monitor 10 to detect the wind speed Ve at the outlet of the spray coating gun 9;
if Ve is smaller than KXVs, the central control system 19 judges that the powder outlet channel 6 is blocked, and sends a command for cleaning the powder outlet channel 6 to a manager;
if Ve is larger than or equal to KXVs, the central control system 19 judges that the powder outlet channel 6 is unobstructed and temporarily does not send out a signal;
where K is a wind speed break coefficient set in the central control system 19.
Further, the suspension speed vt of the different kinds of spraying powder and the actual spraying wind speed ratio Z of the different kinds of spraying powder are set in the central control system 19, and the corresponding suspension speed and actual spraying wind speed ratio can be selected according to the kinds of spraying powder;
after the central control system 19 determines that the powder outlet channel 6 is unobstructed, the suspension speed vt of the spraying powder is compared with the wind speed Ve at the outlet of the spraying gun 9,
if Ve is more than or equal to Z multiplied by vt, the central control system 19 judges that the wind speed provided by the air source device 8 reaches the standard;
if Ve is smaller than zχvt, the central control system 19 determines that the wind speed provided by the air source device 8 does not reach the standard, and the central control system 19 assigns a value to the wind speed Vs output by the air source device 8, and sets vs=zχvt/K.
Further, the central control system 19 is provided with a reasonable conversion coefficient α of the wind speed powder amount, and n×q×a×ρ=α×vs, that is, m=α×vs;
after the central control system 19 determines that the wind speed provided by the air source device 8 reaches the standard, controlling the wind speed flow monitor 10 to detect the spraying powder feeding flow Me at the outlet of the spraying gun 9, wherein Me is the actual value of the spraying powder feeding flow at the outlet of the spraying gun 9 detected by the wind speed flow monitor 10;
if Me is smaller than m1, the central control system 19 judges that powder accumulation occurs in the powder outlet channel 6 and sends a command for cleaning the powder outlet channel 6 to a manager;
if me=m1, the central control system 19 determines that no powder accumulation occurs in the powder channel 6, assigns a value to the rotation speed N of the powder feeding wheel 7, and sets n= [ α× (vt/K) ]/(q×a×ρ), where the central control system 19 predicts the current powder feeding flow My of the device, and my=α× (vt/K);
when the central control system 19 compares and calculates that the actual value Me of the spraying powder feeding flow at the outlet of the spraying gun 9 is equal to the powder feeding flow m1 in the initial state, the powder channel 6 can be judged that powder accumulation does not occur, so that the rotation speed of the powder feeding rotating wheel 7 calculated by the central control system 19 according to the suspension speed of spraying powder can be adjusted, the rotation speed N of the powder feeding rotating wheel 7 matched with the wind speed in the powder feeding channel is obtained, and My is a pre-judgment value of the powder feeding flow after the central control system 19 finishes adjusting the rotation speed N of the powder feeding rotating wheel 7.
After the central control system 19 assigns the rotation speed N of the powder feeding rotating wheel 7, the wind speed flow monitor 10 is controlled again to detect the powder feeding flow Me' at the outlet of the spraying gun,
if Me' =my, the central control system 19 determines that the rotation speed of the powder feeding wheel 7 can provide the expected spraying powder feeding flow for the device;
if Me '< My, the central control system 19 determines that the rotation speed of the powder feeding wheel 7 is too small, and changes the rotation speed of the powder feeding wheel 7 to N', and sets N '=nx (My/Me').
In particular, the central control system 19 compares the thickness L of the sprayed coating in the current spraying area measured by the coating thickness detector 11 with the required thickness L0 of the coating preset by the central control system 19,
if L is less than L0, the central control system 19 judges that the coating in the current area is insufficient, and signals are not sent out;
if l=l0, the central control system 19 determines that the current area spraying is completed, and controls the rotating rack 15 of the object placing table to operate, so that the spraying gun 9 performs spraying operation aiming at the next target spraying position.
In particular, the smart camera 18 is able to detect the volume U of the painting object, and upload the volume data to the central control system 19,
the central control system 19 can control the diffusivity F of the spraying gun, and F=G×U is set, wherein G is a proportional coefficient of the spraying volume and the muzzle diffusivity arranged in the central control system 19;
for the volume U of the spray object, the central control system 19 is provided with a first preset volume U1 and a second preset volume U2,
if U is less than or equal to U1, g=g1;
if U1 is less than or equal to U2, g=g2;
if U > U2, g=g3;
wherein G1 is a first preset value of a proportional coefficient of the spraying volume and the muzzle diffusance; g2 is a second preset value of the proportional coefficient of the spraying volume and the muzzle diffusance; g3 is a third preset value of the proportional coefficient of the spray volume and the muzzle diffusivity, and G1 is smaller than G2 and smaller than G3.
Further, the powder storage tank detecting device 4 can detect the pressure value Y of the powder storage tank 3 in real time when the device is operated, and upload the pressure value Y into the central control system 19,
if the pressure value Y is continuously reduced during the operation of the device, the central control system 19 determines that the powder storage tank is open, and temporarily does not send a signal to the outside;
if the pressure value Y is unchanged or becomes larger during the operation of the device, the central control system 19 judges that the powder storage tank port is blocked and sends a command for cleaning the powder storage tank port to a manager;
in the preparation work before the spraying work is started, the remote control car powder return pipe 13 and the object placing table powder return pipe 17 are in butt joint, and after the spraying work is started, the central control system 19 controls the air extractor of the powder storage tank 3 to be started;
the powder storage tank air extractor 14 extracts the spraying powder which cannot be attached to the spraying object in the object placing table through the object placing table powder return pipe 17, extracts the spraying powder which does not enter the powder outlet channel 6 in the powder inlet channel 5 through the remote control car powder return pipe 13, and the powder storage tank air extractor 14 recovers the extracted spraying powder to the powder storage tank 3.
Further, the powder feeding runner groove on the powder feeding runner 7 is in a hook shape, and the direction of the hook shape is the same as the rotation direction of the powder feeding runner 7;
the object placing table protecting cover 16 is provided with a sealing clamping groove, and the object placing table protecting cover 16 is provided with a sealing clamping groove which can be connected with the clamping groove on the spraying powder feeder shell 2 in preparation before the spraying work is started, so as to prevent spraying powder which cannot be adhered to a spraying object in the object placing table protecting cover 16 from being diffused into the air.
Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will be within the scope of the present invention.
The foregoing description is only of the preferred embodiments of the invention and is not intended to limit the invention; various modifications and variations of the present invention will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The continuous powder feeding device for spraying comprises a storage platform and a remote control vehicle, wherein the remote control vehicle is connected with the storage platform through a radio,
the spraying powder feeder shell is arranged on the remote control car and used for fixing all parts of the device;
the powder outlet channel is arranged at the left side of the inner part of the spraying powder feeding machine shell and is used as an output channel of spraying powder;
the powder inlet channel is arranged on the right side inside the spraying powder feeder shell, and the upper part of the powder inlet channel is communicated with the lower part of the powder storage tank;
the powder feeding rotating wheel is arranged inside the spraying powder feeder shell, and an external cylindrical movable space where the powder feeding rotating wheel is positioned is communicated with the powder inlet channel and the powder outlet channel and is used for controlling the powder outlet quantity;
the air source device is arranged at the upper part of the spraying powder feeder shell, is communicated with the upper part of the powder outlet channel and is used for providing compressed gas;
the spraying gun is communicated with the lower part of the powder outlet channel;
the air speed and flow monitor is arranged on the spray gun and is used for detecting the air speed and the powder spraying and feeding flow at the outlet of the spray gun;
the coating thickness detector is fixed at the upper part of the spraying gun and is used for measuring the thickness of the sprayed coating;
the infrared range finder is fixed at the front end of the remote control car and is positioned at the lower part of the spraying gun and used for measuring the distance between the remote control car and the object placing table;
the object placing table rotating frame is arranged on the object placing table and used for controlling the position of a spraying object;
the intelligent camera is arranged on the object placing table and used for judging the volume of a spraying object;
the central control system is arranged at the tail part of the remote control vehicle, and is connected with the remote control vehicle, the powder feeding rotating wheel, the air source device, the air speed and flow monitor, the coating thickness detector, the infrared range finder and the spraying gun through signal transmission lines, and is connected with the object placing table rotating frame and the intelligent camera through radio signals; the central control system controls the rotation speed of the powder feeding rotating wheel so as to control the powder feeding quantity of the device, controls the air flow speed in the powder discharging channel by controlling the compressed air flow rate provided by the air source device, and can formulate different spraying schemes according to the data information returned by the intelligent camera.
2. The continuous powder feeder for spraying according to claim 1, comprising,
the powder storage tank is arranged at the upper part of the spraying powder feeder shell and is used for storing spraying powder raw materials;
the powder storage tank detection device is fixed on the spraying powder feeder shell, is connected with the bottom of the powder storage tank, is connected with the central control system through a signal transmission line, and can acquire the pressure change condition of the powder storage tank in spraying work;
the powder return pipe of the remote control car is arranged in the remote control car, the lower end of the powder return pipe is communicated with the lower end of the powder inlet channel, and the upper end of the powder return pipe is communicated with the powder storage tank;
the powder storage tank air extractor is arranged at the joint of the powder storage tank and the remote control car powder return pipe, is connected with the central control system through a signal transmission line and is used for extracting spraying powder recovered in the remote control car powder return pipe;
the object placing table protection cover is arranged on the object placing table and used for preventing spraying powder from diffusing;
the object placing table powder returning pipe is arranged on the object placing table and used for recovering the falling spraying powder during spraying.
3. The continuous powder feeding device for spraying according to claim 2, wherein the central control system controls the remote control car to move in front of the object placing table, and controls the remote control car to carry out position fine adjustment according to the distance between the remote control car and the object placing table, which is measured by the infrared range finder, and enables the object placing table powder return pipe to be in butt joint with the remote control car powder return pipe;
the central control system is internally provided with a powder feeding flow value M, wherein M=Nxq x a x ρ is set, N is the rotating speed of the powder feeding rotating wheel, q is the number of grooves of the powder feeding rotating wheel, a is the volume of spraying powder which can be loaded in a single powder feeding rotating wheel groove, ρ is the stacking density of the spraying powder in the powder feeding rotating wheel groove, and in an initial state, M=m1 is set, wherein M1 is the powder feeding flow in the initial state;
setting n=n1, wherein N1 is the rotating speed of the powder feeding rotating wheel in the initial state;
the central control system is internally provided with an air source device output air speed Vs, and in an initial state, the central control system controls the powder feeding rotating wheel to start to operate at the rotating speed of n1 and controls the air source device to supply air at the output air speed of Vs1, and spraying work is started.
4. The continuous powder feeding device for spraying according to claim 3, wherein the intelligent camera monitors the color difference of the outer surface of the spraying object in real time and transmits the color difference beta of the outer surface of the spraying object to the central control system,
the central control system is internally provided with a chromatic aberration allowable value beta 0,
if beta is less than or equal to beta 0, the central control system judges that the spraying work is normal, and signals are not sent out;
if beta is larger than beta 0, the central control system judges that the spraying work is abnormal, and controls the rotating frame of the object placing table to operate, so that the spraying gun performs spraying color difference compensation on the position area with color difference;
after the spray coating color difference compensation is carried out on the position area with the color difference, the central control system controls the wind speed flow monitor to detect the wind speed Ve at the outlet of the spray coating gun;
if Ve is smaller than KXVs, the central control system judges that the powder outlet channel is blocked, and sends a command for cleaning the powder outlet channel to a manager;
if Ve is more than or equal to KXVs, the central control system judges that the powder outlet channel is smooth, and signals are not sent out temporarily;
and K is a wind speed damage coefficient arranged in the central control system.
5. The continuous powder feeding device for spraying according to claim 4, wherein the suspension speed vt of different types of spraying powder and the actual spraying wind speed ratio Z of different types of spraying powder are arranged in the central control system, and the corresponding suspension speed and actual spraying wind speed ratio can be selected according to the types of spraying powder;
after the central control system judges that the powder outlet channel is unobstructed, the suspension speed vt of the spraying powder is compared with the wind speed Ve at the outlet of the spraying gun,
if Ve is more than or equal to Z multiplied by vt, the central control system judges that the wind speed provided by the air source device reaches the standard;
if Ve is smaller than Z×vt, the central control system judges that the wind speed provided by the air source device does not reach the standard, and the central control system assigns a value to the output wind speed Vs of the air source device, and sets Vs=Z×vt/K.
6. The continuous powder feeder for spraying according to claim 5, wherein the central control system is internally provided with a reasonable conversion coefficient α of the wind speed powder quantity, and n×q×a×ρ=α×vs, i.e., m=α×vs;
after judging that the wind speed provided by the air source device reaches the standard, the central control system controls the wind speed flow monitor to detect the spraying powder feeding flow Me at the outlet of the spraying gun,
if Me is less than m1, the central control system determines that powder accumulation occurs in the powder channel and sends a command for cleaning the powder outlet channel to a manager;
if me=m1, the central control system determines that powder accumulation does not occur in the powder channel, assigns a value to the rotating speed N of the powder feeding rotating wheel, and sets n= [ α× (vt/K) ]/(q×a×ρ), and at this time, the central control system pre-determines the powder feeding flow My of the current device, where my=α× (vt/K);
after the central control system assigns the rotating speed N of the powder feeding rotating wheel, the wind speed and flow monitor is controlled again to detect the powder feeding flow Me' at the outlet of the spraying gun,
if Me' =my, the central control system determines that the rotating speed of the powder feeding rotating wheel can provide expected powder feeding flow for spraying of the device;
if Me '< My, the central control system judges that the rotating speed of the powder feeding rotating wheel is too small, and changes the rotating speed of the powder feeding rotating wheel to N', and sets N '=N× (My/Me').
7. The continuous powder feeder for spraying according to claim 6, wherein the central control system compares the sprayed coating thickness L in the current spraying area measured by the coating thickness detector with a coating required thickness L0 preset by the central control system,
if L is less than L0, the central control system judges that the coating in the current area is insufficient, and signals are not sent out;
if l=l0, the central control system determines that the spraying of the current area is completed, and controls the rotating frame of the object placing table to operate, so that the spraying gun is aligned to the next target spraying position for spraying.
8. The continuous powder feeder for spraying according to claim 1, wherein the smart camera is capable of detecting volume data of a spray object and uploading the volume data to the central control system,
the central control system can analyze and calculate the volume data uploaded by the intelligent camera, the spray gun diffusivity is controlled through the volume of the spray object, and the spray gun diffusivity is positively correlated with the volume of the spray object.
9. The continuous powder feeding device for spraying according to claim 2, wherein the powder storage tank detection device can detect the pressure value Y of the powder storage tank in real time and upload the pressure value Y into the central control system when the device is operated,
if the pressure value Y is continuously reduced in the operation of the device, the central control system judges that the powder storage tank is open and temporarily does not send out a signal;
if the pressure value Y is unchanged or becomes larger in the operation of the device, the central control system judges that the powder storage tank port is blocked and sends a command for cleaning the powder storage tank port to a manager;
in the preparation work before the spraying work is started, the remote control car powder return pipe is in butt joint with the object placing table powder return pipe, and after the spraying work is started, the central control system controls the air extractor of the powder storage tank to be started;
the powder storage tank air extractor extracts the spraying powder which cannot be attached to a spraying object in the object placing table through the object placing table powder return pipe, extracts the spraying powder which does not enter the powder outlet channel in the powder inlet channel through the remote control car powder return pipe, and recovers the extracted spraying powder to the powder storage tank.
10. The continuous powder feeding device for spraying according to claim 1, wherein the powder feeding runner groove on the powder feeding runner is of a hook shape, and the direction of the hook shape is the same as the rotation direction of the powder feeding runner;
the object placing table protecting cover is provided with a sealing clamping groove which can be connected with the clamping groove on the spraying powder feeder shell in preparation before the spraying work starts, so that spraying powder which cannot be attached to a spraying object in the object placing table protecting cover is prevented from being diffused into the air.
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| CN202310408766.2A CN116140088B (en) | 2023-04-18 | 2023-04-18 | Continuous powder feeding device for spraying |
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| CN202310408766.2A CN116140088B (en) | 2023-04-18 | 2023-04-18 | Continuous powder feeding device for spraying |
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| CN116140088B true CN116140088B (en) | 2023-06-27 |
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| US5505763A (en) * | 1994-10-07 | 1996-04-09 | Nordson Corporation | System and method for controlling air flow through a powder coating booth |
| CN2447056Y (en) * | 2000-09-25 | 2001-09-12 | 中国科学院力学研究所 | Fine powder constant-weight supplying device for hot spraying |
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