CN112007775A - Flush coater is used in building decoration with adjustable spraying range - Google Patents

Abstract

The invention discloses a spraying machine with adjustable spraying range for building decoration, which comprises a spraying device, wherein the spraying device is arranged in a three-axis moving platform, a storage tank capable of moving back and forth and left and right along with the spraying device is further arranged in the three-axis moving platform, the spraying device can spray negatively-charged atomized coatings, and the spraying range of the atomized coatings can be adjusted. Compared with the prior art, the coating formed on the surface of the coated workpiece by the coating machine for building decoration is relatively flat and uniform, the adhesive force of the paint film is relatively high, and the coating range of the paint can be relatively accurately adjusted.

Description

A spraying machine for building decoration and decoration with adjustable spraying range

technical field

The invention relates to the technical field of building decoration equipment, in particular to a spraying machine for building decoration and decoration with adjustable spraying range.

Background technique

Decoration spraying is a coating method that is dispersed into uniform and fine droplets through a spray gun or atomizer, with the help of pressure or centrifugal force, and applied to the surface of the object to be coated. It can be divided into air spraying, airless spraying, electrostatic spraying, etc. The technology and environment that are paid attention to when spraying are very strict. A little carelessness will cause the coating effect to not reach the desired effect.

Most of the existing spraying equipment is hand-held. During spraying, the position and duration of spraying are manually controlled. During spraying, the position of the nozzle needs to be moved in multiple directions, which is easy to cause uneven spraying, and the paint is easily scattered and rebounded during spraying. Poor environment, easy to cause pollution, and waste of paint.

The existing electrostatic spraying device can better control the scattering and rebound of the paint. However, when the paint with conductivity and non-conductive state is in the device, the corona current leakage at the charging point of the paint and the current caused by the electric spark discharge pass through. The flow of paint and the resulting inductive separation can change one or more of the paint's fluid properties, such as viscosity, resistivity, and surface tension, and thus can change the charge-to-mass ratio of the spray result. Changes in charge-to-mass ratio affect the spray pattern and may hinder the Spray quality indicators. Also, unless the equipment is highly insulated, voltages above 10KV can break down over a distance of about 6mm, leaking into the case and creating a risk of electric shock.

In addition, in the conventional air spraying device, the spraying of the paint is guided by the air flow, and the scattering of the paint can be prevented. However, since the guide air is supplied in the direction almost the same as the moving direction of the sprayed paint, it is not a good solution to the paint. The problem of dispersion, in addition, the solvent volatilization of the paint in the air stream is too fast, which causes it to condense and cause the spray to produce small particles.

In addition, most of the existing spraying devices control the spraying range by adjusting the pressure or flow rate, and cannot control the spraying range under a certain flow rate more accurately.

Therefore, it is necessary to provide a spraying machine for building decoration and decoration with an adjustable spraying range to solve the above-mentioned problems in the background art.

SUMMARY OF THE INVENTION

In order to achieve the above purpose, the present invention provides the following technical solutions: a spraying machine for building decoration and decoration with an adjustable spraying range, comprising a spraying device, wherein the spraying device is arranged in a three-axis mobile platform, and the three-axis mobile platform There is also a storage tank that can move forward and backward and left and right following the spraying device. The spraying device can spray negatively charged atomized paint and can adjust the spraying range of the atomized paint.

Further, preferably, the three-axis mobile platform includes a Y track, an X track and a Z track, the two ends of the X track are respectively movably arranged on two Y tracks, and the Y track is arranged on the rack. , a platform 1 is movably arranged on the X track, a storage tank is fixed on the platform 1, a Z track is movably arranged along the vertical direction, and a platform 2 is movably arranged on the Z track , a spraying device is fixed on the second platform;

The interconnection of the Y track, the X track, the Z track and the platform one is all provided with a drive device;

The top of the Z track is provided with a chain lifting device, which drives the up and down movement of the driving platform 2 through its rewinding;

The X track is composed of at least one track that can be spliced back and forth.

Further, preferably, the spraying device comprises a spraying hood, a spraying assembly and a blowing assembly, the spraying assembly and the blowing assembly are coaxially arranged in the spraying hood, and the spraying assembly can spray the mist-like paint and apply it to the spraying hood. Applying a negative charge, the blower assembly can blow out guiding air around the mist paint sprayed by the spray assembly;

The outer shell of the spraying cover is provided with at least one magnetic ring, which can be energized to generate a negative magnetic field directed to the center of the circle, so as to adjust the aggregation degree of the negatively charged mist paint.

Further, preferably, the blower assembly includes a deflector, an adjustment ring and a blower shell, the blower shell is a cylindrical cavity, and the center is a feed pipe, and the feed pipe is connected to the spray assembly. connect;

A plurality of deflectors are arranged in the blast casing along the circumference of the spray assembly. The outer corner of the deflector away from the center of the circle is connected to the edge of the blast casing through a universal ball, and the inner side of the deflector is close to the center of the circle. One of the corners is connected with the adjustment ring through the second universal ball, and the deflector can be tilted and rotated by the rotation and forward push of the adjustment ring;

The rear end of the deflector is an air channel, and the air channel is provided with high-pressure air by an air generator, and the air generator can adjust at least one characteristic of air pressure, flow rate, temperature, and humidity.

Further, preferably, the second universal ball and the adjustment ring are connected through a universal ball groove, and the universal ball groove in the adjustment ring can limit the second universal ball in it, and allow the universal ball The second ball moves along it, the adjusting ring has a ring of tooth grooves on the side away from the universal ball groove, and the inside of the adjusting ring is connected with the telescopic ring through a plurality of gears meshing with it;

The gears can rotate relative to the telescopic ring, and one of the gears is driven by a motor, and a telescopic rod is provided on the back of the telescopic ring.

Further, preferably, the spray assembly includes an intermittent feeding rotor, a nozzle and a high-voltage electric needle, the nozzle is fixedly connected to the feeding pipeline, a circular cavity is arranged in the nozzle, and a rotatable cavity is provided in the cavity. The intermittent feeding rotor has a plurality of blades distributed around the circumference. The blades are attached to the inner wall of the cavity of the nozzle, and the interior is divided into a plurality of independent cavities. Each independent cavity can rotate the feed. The paint in the feed pipe is sent to the front end of the nozzle, and the paint is sprayed out by the propeller.

Further, preferably, the front end of the nozzle is provided with an atomizing disk, and the vertical section of the atomizing disk is an "E"-shaped curve, which can spread the paint pressure around the center of the circle, and the atomizing disk has a directional opening. The outwardly inclined spray holes can spray the paint in a diffuse manner.

Further, preferably, there are multiple high-voltage electric needles at the front end of the nozzle and around the atomizing disc, and the high-voltage electric needles are provided with high-voltage electricity by a high-voltage package, and a sharp-angle discharge area is formed in the area surrounded by the high-voltage electric needle. , so that the micronized paint captures electrons and is negatively charged.

Further, preferably, the magnetic ring includes an electromagnet and a shielding cover, a plurality of the electromagnets are circumferentially distributed in the spraying cover, and the negative electrode of each electromagnet faces inward, and the outer side of the electromagnet ring is surrounded by a shielding cover. surrounded.

Compared with the prior art, the beneficial effects of the present invention are:

1. In this application, the high-pressure air blown out of the air channel is separated by a deflector inclined and twisted at a certain angle, which can form a spiral twisted air flow, cover the mist paint sprayed by the spray assembly, guide the path of the paint, and prevent During the process of mobile spraying, the paint spreads chaotically due to airflow, and the temperature and humidity of the paint are controlled to prevent the paint particles scattered between the spraying component and the sprayed object from condensing in extreme working environments, or the solvent volatilizes too quickly , so that it cannot maintain the original fluid characteristics and affect the spraying effect, and it can also prevent impurities such as dust in the air from mixing into the paint, and the twisted air flow has a certain angle relative to the spraying paint particles in a straight line, which can make the paint particles side 2. In this application, since the local electric field strength exceeds the ionization field strength of the gas near the tip electrode of the high-voltage electro-acupuncture needle, the gas is ionized and excited, and thus corona discharge occurs, causing atomization The paint captures electrons under the action of the high-voltage DC electric field and is negatively charged. Due to electrostatic attraction, the negatively charged paint particles are painted along the direction of the electric force line and adsorbed to the surface of the workpiece. Therefore, there is basically no paint jet rebound and paint fog. Due to the scattering phenomenon, the loss of paint mist is very small, and due to the action of the high-voltage electrostatic field, the dispersion of paint particles is high, and the distribution in the jet is also relatively uniform, so the coating formed on the surface of the painted workpiece is also relatively smooth and uniform, and the paint film has a high degree of dispersion. Adhesion is high.

3. in this application, when the magnetic force ring in the spray cover is energized, the magnetic force that the negative pole points to the center of the circle is generated, because the magnetic force cancels each other out in the annular ring, therefore, the magnetic force is smaller the closer to the center of the annular ring, and there is no magnetic force in the center of the circle, right. The negative charge (charged paint) passing through the ring produces the effect of homosexual repulsion and gathering towards the center, and the closer the edge is to the greater the repulsive force, the paint spraying range can be adjusted by adjusting the magnetic force of the electromagnet.

Description of drawings

Fig. 1 is the structural representation of a kind of spraying range adjustable spraying machine for building decoration;

Fig. 2 is a kind of spraying device structure schematic diagram of a spraying range-adjustable building decoration spraying machine;

3 is a schematic structural diagram of a blower assembly and a spray assembly of a spraying range-adjustable building decoration sprayer;

Figure 4 is a schematic diagram of the structure of the deflector of a spraying range-adjustable spraying machine for building decoration and decoration;

Fig. 5 is a kind of structural representation of spraying range adjustable spraying machine for building decoration;

In the figure: 1, Y track; 2, X track; 3, Z track; 4, platform one; 5, platform two; 6, spraying device; 7, storage tank; 8, blower assembly; 81, blower shell body; 82, air pipe; 83, deflector; 84, universal joint two; 85, universal joint one; 86, telescopic rod; 87, feed pipe; 88, telescopic ring; 89, adjustment ring; 9, Spraying device; 91, spray head; 92, intermittent feeding rotor; 93, high voltage electric needle; 94, atomizing disc; 95, propeller; 10, spray cover; 11, magnetic ring; 111, shield cover; 112, electromagnet ; 12. High pressure package; 13. Air generator.

Detailed ways

Referring to FIG. 1 , in an embodiment of the present invention, a spraying machine for building decoration and decoration with an adjustable spraying range includes a spraying device 6 , wherein the spraying device 6 is arranged in a three-axis moving platform, and the three-axis moving platform There is also a storage tank 7 that can move forward and backward and left and right following the spraying device 6. The spraying device 6 can spray negatively charged atomized paint and can adjust the spraying range of the atomized paint.

In this embodiment, the three-axis moving platform includes a Y track 1, an X track 2 and a Z track 3. Both ends of the X track 2 are respectively movably arranged on the two Y tracks, and the Y track is arranged on the On the frame, a platform one 4 is movably provided on the X track, a storage tank 4 is fixed on the platform one 4, and a Z track is movably provided along the vertical direction, and the Z track can be moved. A second platform 5 is movably provided, and a spraying device 6 is fixed on the second platform 5;

The interconnection of the Y track 1, the X track 2, the Z track 3 and the platform one 4 is provided with a drive device, which can be a synchronous belt drive or a rack and pinion drive, which is the prior art, and will not be repeated here;

The top of the Z track 3 is provided with a chain lifting device, which drives the up and down movement of the driving platform 2 5 through its winding to ensure the stability of the platform 2 5. Because the Z track 3 itself can move up and down relative to the X track 2, and the platform The second 5 can move up and down relative to the Z track 3, so the up and down range of the spraying range is large, and the dead angle and dead zone are small;

Moreover, the Z track 3 is slightly longer than the height of the Y track 1 to ensure that it can be sprayed to the object to be coated at the bottom of the equipment;

The X-track 2 is composed of at least one track that can be spliced back and forth, and the length of the X-track 2 can be extended by splicing multiple sections, improving its scope of application, and facilitating disassembly and turnover transportation.

Please refer to FIG. 2 , in this embodiment, the spraying device 6 includes a spraying cover 10, a spraying assembly 9 and an air blowing assembly 8, and the spraying assembly 9 and the blowing assembly 8 are coaxially arranged in the spraying cover 10. The spray assembly 9 can spray the mist paint and apply negative charge to it, and the blower assembly 8 can blow out and guide air around the mist paint sprayed by the spray assembly 9;

The shell of the spraying cover 10 is provided with at least one magnetic ring 11 , the magnetic ring 11 can be energized to generate a negative magnetic field pointing to the center of the circle, and adjust the concentration of the negatively charged mist paint.

Referring to FIG. 3 , in this embodiment, the blower assembly 8 includes a deflector 83 , an adjustment ring 89 and a blower casing 81 . The blower casing 81 is a cylindrical cavity with a feed pipe 87 in the center. , the feed pipe 87 is connected with the spray assembly 9 through;

A plurality of deflectors 83 are arranged in the blower housing 81 along the circumference of the spray assembly 9 , and the outer corner of the deflector 83 away from the center of the circle is connected to the edge of the blower housing 81 through a universal ball 85 , a corner of the inner side of the deflector 83 close to the center of the circle is connected with the adjustment ring 89 through the universal ball II 84, and the deflector 83 can be tilted and rotated through the rotation and forward push of the adjustment ring 89;

The rear end of the deflector 83 is an air channel 82, and the air channel 82 is provided with high-pressure air by the air generator 13, and the air generator 13 can adjust at least one of the air pressure, flow rate, temperature, and humidity of the air. a characteristic.

Please refer to FIG. 3 and FIG. 4 , in this embodiment, the second universal ball 84 and the adjustment ring 89 are connected through the universal ball groove, and the universal ball groove in the adjustment ring 89 is a circle to connect the universal ball A groove in which the second ball 84 is confined and can allow the second universal ball 84 to move along it, the adjusting ring 89 has a ring of teeth on the side away from the groove of the universal ball, which engages with it through a plurality of The gear is connected with the telescopic ring 88;

The gears can rotate relative to the telescopic ring 88, and one of the gears is driven by a motor. The back of the telescopic ring 88 is provided with a telescopic rod 86;

The high-pressure air blown out of the air passage 82 is separated by the deflector 83 which is inclined and twisted at a certain angle, and can form a spiral twisted air flow, which covers the mist paint sprayed by the spray assembly 9, guides the path of the paint, and prevents movement. During the spraying process, the paint spreads chaotically due to airflow, and the temperature and humidity of the paint are controlled to prevent the paint particles scattered between the spraying component 9 and the sprayed object from condensing or the solvent volatilizes too quickly in extreme working environments. , so that it cannot maintain the original fluid characteristics and affect the spraying effect, and it can also prevent impurities such as dust in the air from mixing into the paint;

The twisted air flow has a certain angle relative to the sprayed paint particles in a straight line, so that the paint particles can be dispersed laterally and mixed with the air more evenly. related.

Referring to FIG. 3 , in this embodiment, the spray assembly 9 includes an intermittent feeding rotor 92 , a nozzle 91 and a high-voltage electric needle 93 , the nozzle 91 is fixedly connected with the feeding pipe 87 , and the nozzle 91 has a circular shape inside. The intermittent feeding rotor 92 is rotatably arranged in the cavity. The intermittent feeding rotor 92 has a plurality of blades distributed around the circumference. Cavities, each independent cavity can send the paint in the feed pipe 87 to the front end of the nozzle 91 by rotating, and is driven by the propeller 95 to spray the paint;

Through the separated cavity in the intermittent feeding rotor 92, the leakage of the current emitted by the high-voltage electric needle 93 to the lower potential position inside the device is blocked;

When the conductive and non-conductive paint is inside the device, corona current leakage at the high voltage electrical needle 93 and current caused by spark discharges flow through the paint and the resulting inductive separation can alter one or more of the paint Fluid properties, such as viscosity, resistivity, and surface tension, and thus can change the charge-to-mass ratio of the spray results, changes in charge-to-mass ratio affect spray molding and may hinder spray quality metrics;

In another embodiment, a conductive shield is added to the outer shell of the spray assembly 9 to provide it with a high voltage potential, which can also reduce the risk of current flowing from a location with a lower potential.

Please refer to FIG. 5 , in this embodiment, the front end of the nozzle 91 is provided with an atomizing disk 94, and the vertical section of the atomizing disk 94 is an “E”-shaped curve, which can spread the paint pressure around the center of the circle. The atomizing disc 94 is provided with outwardly inclined spray holes, which can spray the paint in a diffused manner.

In this embodiment, a plurality of high-voltage electric needles 93 are provided at the front end of the nozzle 91 and around the atomizing disc 94 . Sharp corner discharge area, so that the micronized paint captures electrons and is negatively charged;

Due to the small radius of curvature of the high-voltage electro-needle 93, near the tip electrode, the local electric field strength exceeds the ionization field strength of the gas, so that the gas is ionized and excited, so corona discharge occurs, and the atomized paint is under the action of the high-voltage DC electric field. The electrons are captured and negatively charged. Due to electrostatic attraction, the negatively charged paint particles are painted along the direction of the electric force line and adsorbed onto the surface of the workpiece. Therefore, there is basically no paint jet rebound and paint mist scattering phenomenon, and the paint mist loss is very small. Due to the effect of high-voltage electrostatic field, the dispersion of paint particles is high, and the distribution in the jet is relatively uniform, so the coating formed on the surface of the painted workpiece is also relatively smooth and uniform, and the adhesion of the paint film is high.

In this embodiment, the magnetic ring 11 includes an electromagnet 112 and a shielding cover 111, a plurality of the electromagnets 112 are circumferentially distributed in the spraying cover 10, and the negative electrode of each electromagnet 112 faces inward;

When each electromagnet 112 is energized at the same time, a magnetic force with the negative pole pointing to the center of the circle is generated. Since the magnetic forces cancel each other in the circle, the closer to the center of the circle, the smaller the magnetic force, and there is no magnetic force in the center of the circle. (Electrified paint) produces the effect of same-sex repulsion and gathers toward the center, and the closer the edge is to the greater the repulsive force, the paint spraying range can be adjusted by adjusting the magnetic force of the electromagnet 112;

In addition, since the outer side of the electromagnet 112 is the positive electrode, the outer side of the spraying cover 10 will be positive, and the paint sprayed outside the spraying cover 10, especially the paint with small kinetic energy and scattered edges, will be attracted and adsorbed outside it. Therefore, the outer side of the electromagnet 112 is provided with a shielding cover 111 to surround it, so as to isolate the magnetic force.

In the specific implementation, the spraying device 6 is arranged in a three-axis mobile platform, wherein the X track can be extended by multi-stage splicing according to the needs of the implementation site. The baffles 83 are separated, which can form a spiral twisted air flow, cover the mist paint sprayed by the spray assembly 9, guide the path of the paint, and prevent the paint from spreading chaotically due to the airflow during the process of moving spraying, and the temperature of the paint and the temperature of the paint Humidity is controlled, and impurities such as dust in the air can be prevented from mixing into the paint;

The atomized paint passes through the high-voltage electric needle 93, and corona discharges near the tip electrode, so that the atomized paint captures electrons under the action of the high-voltage DC electric field and is negatively charged. The direction is painted and adsorbed on the surface of the workpiece, and due to the action of the high-voltage electrostatic field, the dispersion of the paint particles is high, and the distribution in the jet is also relatively uniform;

When the mist paint is in the spraying cover 11, since the magnetic force ring 11 generates a magnetic force with the negative pole pointing to the center of the circle, it has the effect of gathering towards the center due to the repulsion of the same sex, and the closer the edge is, the greater the repulsion force is, so it can be adjusted by adjusting the magnetic force. The size of the magnetic force of the ring 11 can adjust the paint spraying range;

In another embodiment, the effect of adjusting the spraying angle can be achieved by applying different currents to each electromagnet 112 in the magnetic force ring 11 so that the magnetic force center is deviated from the center of the circle.

The above are only preferred specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. The equivalent replacement or modification of the solution and its inventive concept shall be included within the protection scope of the present invention.

Claims (9)

1. a spraying range-adjustable building decoration spraying machine, comprising spraying device (6), is characterized in that, described spraying device (6) is arranged in the three-axis mobile platform, and is also provided in the three-axis mobile platform. There is a storage tank (7) that can move forward and backward and left and right following the spraying device (6), the spraying device (6) can spray negatively charged atomized paint, and can adjust the spraying range of the atomized paint. 2. A spraying machine for building decoration and decoration with adjustable spraying range according to claim 1, wherein the three-axis mobile platform comprises a Y track (1), an X track (2) and a Z track (3) , the two ends of the X rail (2) are respectively movably arranged on two Y rails, the Y rail is arranged on the frame, and the X rail is movably provided with a platform one (4), so A storage tank (7) is fixed on the platform one (4), which is movably provided with a Z track along the vertical direction, and a platform two (5) is movably provided on the Z track, and the platform two ( 5) A spraying device (6) is fixed on it; A drive device is provided at the interconnection of the Y track (1), the X track (2), the Z track (3) and the platform one (4); The top of the Z track (3) is provided with a chain lifting device, and the up and down movement of the driving platform two (5) is driven by its winding; The X track (2) is composed of at least one track that can be spliced back and forth. 3. A kind of spraying machine for building decoration and decoration with adjustable spraying range according to claim 1, is characterized in that, described spraying device (6) comprises spraying cover (10), spraying assembly (9) and blower assembly ( 8), the spray assembly (9) and the blower assembly (8) are coaxially arranged in the spray hood (10), the spray assembly (9) can spray the mist paint and apply a negative charge to it, the The blower assembly (8) can blow out guiding air around the mist paint sprayed by the spray assembly (9); The shell of the spraying cover (10) is provided with at least one magnetic ring (11), the magnetic ring (11) can be energized to generate a negative magnetic field pointing to the center of the circle, and adjust the aggregation degree of the negatively charged mist paint. 4. A spraying machine for building decoration and decoration with adjustable spraying range according to claim 3, characterized in that the blower assembly (8) comprises a deflector (83), an adjustment ring (89) and a blower a casing (81), the blast casing (81) is a cylindrical cavity, the center is a feed pipe (87), and the feed pipe (87) is throughly connected with the spray assembly (9); A plurality of deflectors (83) are arranged in the blast housing (81) along the circumference of the spray assembly (9), and a corner of the outer side of the deflector (83) away from the center of the circle passes through a universal ball 1 (85). ) is connected with the edge of the blower housing (81), and the inner corner of the deflector (83) close to the center of the circle is connected with the adjustment ring (89) through the second universal ball (84), which can be rotated and adjusted by the adjustment ring (89). Push forward to tilt and rotate the deflector (83); The rear end of the guide plate (83) is an air passage (82), and the air passage (82) is provided with high-pressure air by an air generator (13), and the air generator (13) can at least adjust the air flow. A characteristic of air pressure, flow, temperature, and humidity. 5. A spraying machine for building decoration and decoration with an adjustable spraying range according to claim 4, wherein the second universal ball (84) and the adjustment ring (89) are connected through the universal ball groove, so The gimbal ball groove in the adjusting ring (89) can confine the gimbal ball two (84) in it and allow the gimbal ball two (84) to move along it, and the adjusting ring (89) is away from One side of the universal ball groove is provided with a ring of tooth grooves, which is connected with the telescopic ring (88) through a plurality of gears meshing with it; The gears can rotate relative to the telescopic ring (88), and one of the gears is driven by a motor, and a telescopic rod (86) is provided on the back of the telescopic ring (88). 6. A spraying machine for building decoration and decoration with adjustable spraying range according to claim 3, wherein the spraying assembly (9) comprises an intermittent feeding rotor (92), a nozzle (91) and a high-voltage electric Needle (93), the nozzle (91) is fixedly connected with the feeding pipe (87), the nozzle (91) has a circular cavity, and the cavity is rotatably provided with an intermittent feeding rotor (92), so The intermittent feeding rotor (92) has a plurality of blades distributed around the circumference, and the blades are attached to the inner wall of the cavity of the nozzle (91) to divide the interior into a plurality of independent cavities, and each independent cavity can rotate the feed. The paint in the material pipeline (87) is sent to the front end of the nozzle (91), and is driven by the propeller (95) to eject the paint. 7. A spraying machine for building decoration and decoration with adjustable spraying range according to claim 6, wherein the front end of the nozzle (91) is provided with an atomizing disc (94), and the atomizing disc (94) ) is an "E"-shaped curve in vertical section, which can spread the paint pressure around the center of the circle, and the atomizing disc (94) is provided with outwardly inclined spray holes, which can spray the paint in a diffused manner. 8. A spraying machine for building decoration and decoration with an adjustable spraying range according to claim 7, wherein the front end of the nozzle (91) and the periphery of the atomizing disc (94) are provided with multiple high-voltage electric Needle (93), the high-voltage electric needle (93) is provided with high-voltage electricity by the high-voltage package (12), and a sharp-angle discharge area is formed in the area surrounded by the high-voltage electric needle (93), so that the micronized paint captures electrons and is negatively charged. 9 . The spraying machine for building decoration and decoration with adjustable spraying range according to claim 3 , wherein the magnetic ring ( 11 ) comprises an electromagnet ( 112 ) and a shielding cover ( 111 ), and a plurality of the The electromagnets (112) are circumferentially distributed in the spraying cover (10), the negative pole of each electromagnet (112) faces inward, and the outer side of the electromagnet (112) is surrounded by a circle of shielding covers (111).

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