CN117816398A - Quick-pressure atomizing spray gun - Google Patents

Abstract

The invention discloses a quick-pressure type atomizing spray gun, which relates to the technical field of spray guns and comprises a gun body, wherein a paint nozzle is arranged at the front side of the gun body, and a liquid spraying channel, a paint control thimble, a spray-shaped air inlet channel and a spray-shaped control thimble are arranged in the gun body; an air cap is arranged on the paint nozzle; the middle position of the air cap is provided with an air cap middle through hole, and the front side of the paint nozzle is provided with a paint spraying outlet; an air flow channel groove is formed in the outer side of the paint spraying outlet, and the groove wall of the air flow channel groove is arc-shaped; through adopting the air cap to cooperate the air channel groove design of coating nozzle, air channel groove spun pressure send air current makes coating jet spun coating and air formation mix better, can break up high viscosity, high molecular weight's coating rapidly to better supplementary atomizing air hole's atomizing, solve the too concentrated in the centre of coating and atomized problem that does not open.

Description

Quick-pressure atomizing spray gun

Technical Field

The invention relates to the technical field of spray guns, in particular to a quick-pressure type atomizing spray gun.

Background

Spray guns are the primary tools used in spray applications. The paint liquid of the spray gun is mixed with compressed air and pressurized, and then paint mist is sprayed out. When the existing spray gun needs to atomize high-viscosity high-molecular-weight paint, the air pressure is increased, and the paint can be scattered through the high pressure of the spray-width atomizing holes. The air pressure sprayed out of the middle of the spray gun can only spray paint, so that the paint can flow, and the atomization effect is limited. The mode is easy to cause the coating to be scattered in a transitional way, so that the coating is wasted, the environment-friendly trend is not met, the coating water mist is not beneficial to forming a reliable enough atomization wrapping effect, the spraying shape is easy to deform and unstable, and the coating spraying effect is not uniform enough.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the invention provides a quick-pressure type atomizing spray gun.

The technical scheme adopted for solving the technical problems is as follows: the quick-pressure type atomizing spray gun comprises a gun body, wherein a coating nozzle is arranged at the front side of the gun body, and a liquid spraying channel, a coating control thimble, a spray-shaped air inlet channel and a spray-shaped control thimble are arranged in the gun body; an air cap is arranged on the paint nozzle, a space is reserved between the inner side of the air cap and the paint nozzle to serve as a spray-shaped cavity, and the spray-shaped cavity is communicated with the spray-shaped air inlet channel; the middle position of the air cap is provided with an air cap middle through hole, the front side of the paint nozzle is provided with a paint spraying outlet, and the paint spraying outlet penetrates through the air cap middle through hole and extends out of the air cap; an air flow channel groove is formed in the outer side of the paint spraying outlet, an air flow channel is formed between the air flow channel groove and the middle through hole of the air cap, and the groove wall of the air flow channel groove is arc-shaped.

According to the quick-pressure atomizing spray gun provided by the invention, the design of the air channel groove by adopting the air cap to be matched with the paint nozzle has at least the following technical effects: the compressed air flow sprayed from the air flow channel groove enables the paint sprayed from the paint spraying port to be better mixed with air, and the high-viscosity and high-molecular-weight paint can be rapidly scattered, so that atomization of the atomized air holes is better assisted, and the problem that the paint is too concentrated in the middle and cannot be atomized is solved.

As some preferred embodiments of the present invention, an included angle a is formed between the axis of the paint spraying port and the axis of the air channel, and the value of a is 1-60 degrees.

As some preferred embodiments of the present invention, the air flow channel groove is distributed around the paint ejection outlet.

As some preferred embodiments of the present invention, the air channel slot has a major arc-shaped opening at its front side outlet.

As some preferred embodiments of the invention, the two sides of the air cap are provided with spray breadth angles, and the spray breadth angles are provided with spray breadth holes.

As some preferred embodiments of the present invention, the air cap is provided with pressurizing holes, and the pressurizing holes are distributed around the middle through hole of the air cap.

As some preferred embodiments of the present invention, the paint ejection port includes a tapered narrowed aperture portion on the rear side and a straight ejection aperture portion on the front side.

As some preferred embodiments of the present invention, an included angle b is formed between the hole wall extension line of the conical narrowing hole portion and the axis of the straight ejection hole portion, and the value of b is 5-38.

As some preferred embodiments of the invention, an air distribution plate is arranged outside the paint nozzle, the air distribution plate is positioned between the spray-shaped air inlet channel and the spray-shaped cavity, and air distribution holes are formed in the air distribution plate.

As some preferred embodiments of the invention, the rear side edge position of the paint nozzle and the rear side edge position of the air distribution plate are provided with sealing inclined planes, and an included angle d is formed between the sealing inclined planes and the axis of the paint spraying hole, and the included angle d is 12-23 degrees.

The beneficial effects of the invention are as follows:

1. the air flow channel groove is used for spraying the paint to the paint spraying port, so that the paint sprayed out of the paint spraying port is mixed with air better, the high-viscosity high-molecular-weight paint can be rapidly dispersed, the atomization of the atomized air holes is better assisted, the problem that the paint is too concentrated in the middle to be atomized is solved, and the paint spraying port is equivalent to the double-action effect of pulling out the paint and atomizing the paint.

2. The air pressure used by the quick-pressure type atomizing spray gun is lower than that of the traditional spray gun by 16%, the atomizing transfer efficiency is 15% higher than that of the traditional spray gun, and the stability of an atomizing effect is improved by 18%;

3. compared with the traditional spray gun, the quick-pressure type atomizing spray gun can save 15% of paint, the spraying speed of a user is improved by 18% compared with that of the original spray gun, the application range of the paint is wide, and the quick-pressure type atomizing spray gun is suitable for paint containing metal powder, powdery paint, high-viscosity glue, high-viscosity water paint and the like.

Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Drawings

Additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings, in which:

FIG. 1 is a perspective view of a rapid-pressure atomizing spray gun of the present invention;

FIG. 2 is a perspective cross-sectional view of the rapid-pressure atomizing spray gun of the present invention;

FIG. 3 is a perspective cross-sectional view of the position of the paint nozzle, air cap of the present invention;

FIG. 4 is a schematic view of the structure of the paint nozzle, air cap position of the present invention;

FIG. 5 is a combined schematic of the paint nozzle, air cap position of the present invention;

FIG. 6 is a combined schematic view of another angle of the paint nozzle, air cap position of the present invention;

FIG. 7 is a perspective cross-sectional view of a paint nozzle of the present invention;

fig. 8 is a partial perspective view of the paint ejection port of the present invention.

Reference numerals:

gun body 100, spray channel 110, spray connector 111, paint control thimble 120, thimble adjustment assembly 121, spray-shaped air inlet channel 130, air inlet cavity 131, air valve cavity 132, transition cavity 133, spray-shaped cavity 134, spray-shaped control thimble 140, spray-shaped control assembly 141, air inlet connector 150, air inlet adjustment assembly 160, and grip handle 170; paint nozzle 200, paint ejection port 210, tapered narrowed hole portion 211, straight ejection hole portion 212, air flow channel 220, major arc opening 221, air distribution plate 230, air distribution hole 231, sealing slope 240; an air cap 300, a spray cavity 310, an air cap middle through hole 320, a spray amplitude angle 330, a spray amplitude hole 331 and a pressurizing hole 340.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

In the description of the present invention, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present invention and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present invention.

In the description of the present invention, plural means two or more, and greater than, less than, exceeding, etc. are understood to exclude this number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present invention can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

Fig. 1 is a perspective view of an embodiment of the present invention, and referring to fig. 1, an embodiment of the present invention provides a rapid-compression type atomizing spray gun for performing a spraying operation, and spraying paint to form a spray to cover a wall surface or a work piece.

Further, referring to fig. 2, the fast-pressure type atomizing spray gun of the present invention includes a gun body 100, a paint nozzle 200 is disposed at the front side of the gun body 100, and a spray liquid channel 110, a paint control thimble 120, a spray-shaped air inlet channel 130, and a spray-shaped control thimble 140 are disposed in the gun body 100. Spray control pin 140 is within spray intake passage 130. By injecting the paint liquid into the paint liquid channel 110 in the gun body 100, compressed air is introduced into the spray-shaped air inlet channel 130 in the gun body 100, once the gun body 100 controls the back paint control thimble 120 to open the gun body 100, the air of the spray-shaped air inlet channel 130 is mixed with the paint liquid of the paint liquid channel 110 to form atomized fine fog drops. The spray control ejector pin 140 in the spray air inlet channel 130 can control the gas flow entering the paint nozzle 200 from the spray air inlet channel 130 to be mixed with the liquid by adjusting the clearance between the spray control ejector pin 140 and the outlet of the spray air inlet channel 130, so as to control the spray size. The working principle of the above process can refer to a similar atomizing spray gun device in the prior art, and is not repeated here.

Still further, referring to fig. 3 and 4, the paint nozzle 200 is provided with an air cap 300, and a space is left between the inner side of the air cap 300 and the paint nozzle 200 as a spray-shaped cavity 310, and the spray-shaped cavity 310 is communicated with the spray-shaped air inlet channel 130, i.e. the air flow of the spray-shaped air inlet channel 130 enters the position of the spray-shaped cavity 310.

Still further, referring to fig. 5 and 6, an air cap 300 has an air cap middle through hole 320 at a middle position thereof, and a paint ejection port 210 is provided at a front side of the paint nozzle 200, the paint ejection port 210 extends out of the air cap 300 through the air cap middle through hole 320, and paint is ejected from the paint ejection port 210 through the liquid ejection passage 110.

Still further, referring to fig. 7 and 8, an air flow channel groove 220 is provided outside the paint ejection port 210, and an air flow channel is formed between the air flow channel groove 220 and the air cap intermediate through hole 320, and the wall of the air flow channel groove 220 has an arc shape. The air flow of the spray-shaped cavity 310 can be sprayed out of the air cap 300 along the air flow channel 220.

In actual operation, the paint of the fast-pressure atomizing spray gun of the present invention enters the spray channel 110 of the gun body 100 and is sprayed out from the paint spraying outlet 210 of the paint nozzle 200, meanwhile, the high-pressure air of the spray gun of the present invention enters the spray-shaped air inlet channel 130, and the high-pressure air of the spray-shaped air inlet channel 130 is sprayed out along the air flow channel 220 through the spray-shaped cavity 310, so that the air flow for pressure feeding can be rapidly introduced. The pressurized air flow ensures that the paint is better mixed with air, and the high-viscosity and high-molecular-weight paint can be rapidly dispersed, so that the atomization of the atomization air holes is better assisted, and the paint cannot be too concentrated in the middle and cannot be atomized.

In some embodiments, referring to fig. 4, an included angle a is formed between the axis of the paint spraying port 210 and the axis of the air channel slot 220, and a is 1 ° to 60 °, so that the pressurized air of the air channel slot 220 better cuts into the paint sprayed from the paint spraying port 210.

In some embodiments, referring to fig. 5 and 6, the air flow channels 220 are distributed around the paint outlet 210 to create a more uniform forced air flow to uniformly break up the paint.

In some embodiments, the front side outlet of the air flow channel 220 has a major arc opening 221, so that the air flow in the air flow channel 220 near the paint spraying outlet 210 is larger than the air flow far from the paint spraying outlet 210, so that the compressed air can be concentrated more, and the air around the nozzle can well wrap the atomized paint for protection, thereby forming an integral atomization effect.

In some embodiments, referring to fig. 3, the air cap 300 is provided with a spray angle 330 on both sides, and the spray angle 330 is provided with a spray hole 331.

In some embodiments, referring to fig. 3 and 5, the air cap 300 is provided with pressurizing holes 340, and the pressurizing holes 340 are distributed around the middle through hole of the air cap 300.

In this embodiment, the number of the pressurizing holes 340 is optionally 5 to 16, and the diameter size phi is in the range of 0.9-phi 1.8 mm. The size of the vent hole can adjust and control the internal pressure of the spray cover, and can be set differently according to different viscosity characteristics of the paint or different spray distances.

In some embodiments, the paint outlet 210 includes a tapered narrowed bore portion 211 on the rear side and a straight outlet bore portion 212 on the front side, with the inlet rear end being wide and narrowing gradually to the nozzle front end position, which facilitates faster air pressure delivery.

In some embodiments, referring to fig. 4, an included angle b is formed between the hole wall extension line of the tapered narrowing hole portion 211 and the axis of the straight ejection hole portion 212, and the value of b is 5 ° to 38 °, beyond which the atomization effect is not beneficial, and the intermittent and intermittent effect of the coating may occur.

In some embodiments, different angles are also required to be matched with the inner space of the spray cover, so that the size of the spray cover can be freely adjusted, and the air flow can be guided better. The diameter of the front end of the nozzle can be changed, and the nozzle has a shape matching effect with the middle hole of the spray cover, so that the internal pressure of the spray cover is always kept in a low-pressure state, and the internal pressure of the spray cover is kept below 1.0bar.

In some embodiments, different nozzle outside diameter sizes may feel the width of the spray pattern and the amount of coating protrusion, with the larger nozzle tip diameter, the larger nozzle cap diameter, and the wider spray pattern.

The nozzle can be protruded from the spray cover by 1.2mm, namely recessed from the spray cover by 0.5mm, the flow of the paint can be regulated and controlled by the change of the distance, and the paint can be suitable for more paint with different characteristics according to different paint supply pressure. The air of the atomizing holes of the ears at the two sides of the spray cover is slightly added, so that the paint can be simply and easily scattered and atomized into a uniform shape by using lower air pressure.

In some embodiments, the air distribution plate 230 is disposed outside the paint nozzle 200, the air distribution plate 230 is located between the spray-shaped air inlet channel 130 and the spray-shaped cavity 310, and the air distribution plate 230 is provided with air distribution holes 231.

In this embodiment, optionally, a sealing inclined plane 240 is disposed at the rear edge position of the paint nozzle 200 and the rear edge position of the air distribution plate 230, and an included angle d is formed between the sealing inclined plane 240 and the axis of the paint spraying hole 210, which takes a value of 12 ° to 23 °. That is, the sealing inclined surface 240 of the paint nozzle 200 and the air distribution plate 230 forms a relative seal with the gun body 100 for guiding the air flow through the air distribution holes 231 of the air distribution plate 230. The inner pressure (air flow passing through the air distribution holes 231) and the side pressure (air flow passing through the air distribution angles 330) air of the spray cover can be isolated only by screwing the light coating nozzle 200, and a sealing piece is not needed, so that the spray cover is more suitable for coatings with different characteristics, and the corrosion resistance and the wear resistance are improved.

In some embodiments, the nozzle of the fast-pressure atomizing spray gun of the present invention is designed with different structural modes, defining the aperture of the straight-line spray hole portion 212 as Φa, and the outer diameter of the paint spray hole 210 as Φb:

one is a low pressure structural mode (HVLP), which can produce high flow low pressure atomization effect, so that the internal pressure of the spray cover is lower than 0.7bar, and the requirement of a low pressure spray gun is met. The paint has the characteristics of more efficient transfer efficiency, strong adhesive force, less scattering and the like. The nozzle consists of more than 8 air distribution holes 231, and the aperture size phi is 0.6-phi 1.8. The paint ejection port 210 as the nozzle front end mechanism has a value of Φa from Φ3.5 to Φ5, and cooperates with the aperture Φb to produce an atomization effect in a non-use mode.

The other mode is a medium-pressure structure Mode (MP), the nozzle can produce a relatively large internal pressure effect, and can produce a relatively large pulling force and better paint scattering effect for paint with high viscosity. The nozzle consists of 4-10 air distribution holes 231, and the aperture size phi is 0.8-phi 1.6. The front end mechanism phi A of the nozzle is phi 3.0-phi 4.5, and the front end mechanism phi A is matched with the aperture phi B to generate an atomization effect of a non-use mode.

In some embodiments, referring to fig. 3, the spray-shaped air inlet channel 130 includes an air inlet cavity 131, an air valve cavity 132, a transition cavity 133, and a spray-shaped cavity 134. The air valve chamber 132 is used to mount an air valve. After the high-pressure air of the external air source enters the air valve cavity 132 through the air inlet cavity 131, part of the high-pressure air pressurizes the paint, and meanwhile, the other high-pressure air reaches the position of the spray cavity 134 through the transition cavity 133, and is sprayed out as fast-pressure air flow along the air channel 220 through the spray cavity 310.

In some embodiments, referring to fig. 2 and 3, spray channel 110 is provided with spray connector 111 for externally connecting to a paint input source.

In some embodiments, a spray control assembly 141 is provided on the spray cavity 134 for controlling the paint input source pressure.

In some embodiments, the air inlet cavity 131 is provided with an air inlet connector 150 and an air inlet adjusting component 160, which are used for being externally connected with a high-pressure air input source, wherein the air inlet connector 150 is used for being externally connected with an air source, and the air flow rate is adjusted by the air inlet adjusting component 160.

In some embodiments, referring to fig. 1 and 2, a grip 170 is provided on the gun body 100, so that a user can hold the gun body 100 conveniently.

In the description of the present specification, reference to the term "some embodiments" or "what may be considered to be" etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. The utility model provides a fast-pressure type atomizing spray gun, includes the rifle body (100), rifle body (100) front side is provided with coating nozzle (200), be provided with liquid spray channel (110), coating control thimble (120), spout shape air inlet channel (130), spout shape control thimble (140) in the rifle body (100), its characterized in that:

an air cap (300) is arranged on the paint nozzle (200), a space is reserved between the inner side of the air cap (300) and the paint nozzle (200) to serve as a spray-shaped cavity (310), and the spray-shaped cavity (310) is communicated with the spray-shaped air inlet channel (130);

the middle position of the air cap (300) is provided with an air cap middle through hole (320), the front side of the paint nozzle (200) is provided with a paint spraying outlet (210), and the paint spraying outlet (210) penetrates through the air cap middle through hole (320) and stretches out of the air cap (300);

an air flow channel groove (220) is formed in the outer side of the paint spraying port (210), an air flow channel is formed between the air flow channel groove (220) and the air cap middle through hole (320), and the groove wall of the air flow channel groove (220) is arc-shaped.

2. A fast-pressure atomizing spray gun according to claim 1, wherein: an included angle a is formed between the axis of the paint spraying outlet (210) and the axis of the air flow channel (220), and the value of a is 1-60 degrees.

3. A fast-pressure atomizing spray gun according to claim 1, wherein: the air flow channel grooves (220) are distributed around the paint ejection outlet (210).

4. A fast-pressure atomizing spray gun according to claim 1, wherein: the front side outlet of the air channel groove (220) is provided with a major arc opening (221).

5. A fast-pressure atomizing spray gun according to claim 1, wherein: the two sides of the air cap (300) are provided with spray amplitude angles (330), and spray amplitude holes (331) are formed in the spray amplitude angles (330).

6. A fast-pressure atomizing spray gun according to claim 1, wherein: the air cap (300) is provided with pressurizing holes (340), and the pressurizing holes (340) are distributed around the middle through hole of the air cap (300).

7. A fast-pressure atomizing spray gun according to claim 1, wherein: the paint ejection port (210) includes a tapered narrowed aperture portion (211) on the rear side and a straight ejection aperture portion (212) on the front side.

8. A fast-pressure atomizing spray gun according to claim 7, wherein: an included angle b is formed between the hole wall extension line of the conical narrowing hole part (211) and the axis of the straight ejection hole part (212), and the value of b is 5-38 degrees.

9. A fast-pressure atomizing spray gun according to claim 1, wherein: the outside of coating nozzle (200) is provided with air distribution plate (230), air distribution plate (230) are located spout shape air inlet channel (130) with spout shape cavity (310), be provided with on air distribution plate (230) and distribute wind hole (231).

10. A fast-pressure atomizing spray gun according to claim 9, wherein: the rear edge position of the paint nozzle (200) and the rear edge position of the air distribution plate (230) are provided with sealing inclined planes (240), and an included angle d is formed between the sealing inclined planes (240) and the axis of the paint spraying outlet (210), and the included angle is 12-23 degrees.