CN216500114U

CN216500114U - Low-pressure low-flow atomizing spray gun

Info

Publication number: CN216500114U
Application number: CN202122636430.0U
Authority: CN
Inventors: 卢永发
Original assignee: Foshan Nanhai Prona Air Tool Manufacturing Ltd
Current assignee: Foshan Nanhai Prona Air Tool Manufacturing Ltd
Priority date: 2021-10-29
Filing date: 2021-10-29
Publication date: 2022-05-13
Anticipated expiration: 2031-10-29

Abstract

The utility model discloses a low-pressure low-flow atomization spray gun, which comprises a gun body, wherein a spray cover assembly is arranged on the gun body, a main through pipe and an ejector pin are arranged in the gun body, and a coating passage is also arranged on the gun body and communicated with the main through pipe; the spray cover assembly comprises a middle nozzle piece, a piston cavity is arranged at the rear side of the gun body, and an air piston valve is arranged in the piston cavity; the piston cavity is a linear cavity, the left side and the right side of the front side of the piston cavity are provided with side air inlet joints, the lower side of the piston cavity is provided with a lower air inlet joint, and the lower air inlet joint is positioned at the rear side of the side air inlet joint; through the design of the piston cavity matched side air inlet joint and the lower air inlet joint which adopt the linear cavity, the atomizing spray gun can work normally in a low-pressure and low-flow mode, the scattering of the coating is reduced, the sprayed object is prevented from being blown and shaken by air, and the spray gun is particularly suitable for the sprayed material with high adhesive force.

Description

Low-pressure low-flow atomizing spray gun

Technical Field

The utility model relates to the technical field of spray guns, in particular to an atomization spray gun suitable for low pressure and low flow.

Background

In the existing processing process, spray coatings such as coatings, adhesives and the like are usually sprayed by a spray gun, the existing spray gun needs to directly release the coatings from a main spray hole through high-pressure air flow without pressure release, and the formed high-pressure air impacts the coatings into small particles at an outlet. For some spray coatings or workpiece materials (for example, the requirement for adhesion is higher), when the spray coating is sprayed on a workpiece at high pressure, a sufficiently uniform surface may not be obtained, and meanwhile, because the speed of the sprayed gas is faster than that of the atomized paint, the sprayed gas can be in a large amount and forcefully collided with the surface of the workpiece and then rebounded, and the paint which does not reach the surface of the workpiece is scattered, and the workpiece may also be blown by the high-pressure gas to shake and deform, so that the spray coating cannot be effectively adhered to the workpiece, and the spraying effect is directly influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defects of the prior art, the utility model provides a low-pressure low-flow atomization spray gun.

The technical scheme adopted by the utility model for solving the technical problems is as follows: the low-pressure low-flow atomization spray gun comprises a gun body, wherein a spray cover assembly is arranged on the gun body, a main through pipe and a thimble are arranged in the gun body, and a coating channel is also arranged on the gun body and communicated with the main through pipe; the spray cover assembly comprises a middle nozzle piece, the output end of the main through pipe is communicated with the middle nozzle piece, a piston cavity is arranged at the rear side of the gun body, an air piston valve is arranged in the piston cavity, the front side of the ejector pin penetrates into the middle nozzle piece, and the rear side of the ejector pin penetrates into the air piston valve; the piston cavity is a linear cavity, side air inlet joints are arranged on the left side and the right side of the front side of the piston cavity, a lower air inlet joint is arranged on the lower side of the piston cavity, and the lower air inlet joint is located on the rear side of the side air inlet joint.

According to the low-pressure low-flow atomization spray gun provided by the utility model, the piston cavity with the linear cavity is matched with the side air inlet joint and the lower air inlet joint, so that the atomization spray gun can work normally in a low-pressure low-flow mode, the scattering of paint is reduced, the sprayed objects are prevented from being blown and shaken by air, and the low-pressure low-flow atomization spray gun is particularly suitable for spray paint with high required adhesive force.

As some preferred embodiments of the present invention, the main through pipe includes a diversion cavity on the front side, a diversion cover is disposed in the diversion cavity, and a diversion hole is disposed on the diversion cover.

As some preferred embodiments of the present invention, a buffer ring is disposed on the shunting cover, and a gap is left between the buffer ring and the inner wall of the shunting cavity.

As some preferred embodiments of the present invention, the spray cover assembly includes a spray horn, a spray air passage is provided in the spray horn, a spray nozzle is provided on the spray horn, a spray width adjusting cavity is provided on the gun body, the spray width adjusting cavity is communicated with the spray air passage, and a spray adjusting knob is provided on the spray width adjusting cavity.

As some preferred embodiments of the present invention, an auxiliary atomizing opening is provided between the intermediate nozzle member and the nozzle orifice.

As some preferable embodiments of the utility model, a stainless steel inlaid pipe is arranged in the main through pipe.

As some preferred embodiments of the present invention, the air piston valve includes a first connection ring, a second sealing ring, and a third sealing ring, the first connection ring and the second sealing ring are connected to each other, and the second sealing ring and the third sealing ring are connected to each other through connection columns, and a gap is left between the connection columns.

As some preferred embodiments of the utility model, the rear side of the piston cavity is provided with a thimble guide seat, a thimble spring and a paint knob.

The utility model has the beneficial effects that:

1. the spray gun can work in a low-pressure low-flow state, so that the paint scattering is reduced, sprayed objects are not blown by air to shake, and the spray gun is suitable for spray paints with high required adhesive force;

2. the side air inlet joint and the lower air inlet joint can simultaneously intake air, and can provide stable and sufficient air flow;

3. the piston cavity space of the linear cavity is large, the air inlet and outlet spaces of the part structure part are large, more air can be stored, the obstruction to air flow can be reduced, the pressure is kept stable, and the air flow is more uniform and smooth;

4. the distributing cavity is matched with the distributing hole of the distributing cover, so that the air can be more uniform and stable after flowing through;

5. the reposition of redundant personnel chamber space of spouting lid subassembly department is big, and the cooperation spouts the width of cloth spout can be evenly broken up paint under the condition of lower inlet pressure, and the width of cloth length reaches the meet the demands, atomizes softly, the fine effect of granule to coating flies apart and lacks, improves the coating adhesion rate.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a perspective view of the present invention;

FIG. 2 is a perspective view of another angle of the present invention;

FIG. 3 is a cross-sectional view of the present invention;

FIG. 4 is a schematic cross-sectional view of the present invention;

FIG. 5 is a partial cross-sectional view of the position of the spray cap assembly of the present invention;

FIG. 6 is a perspective view of the diverter cap of the present invention;

fig. 7 is a perspective view of the air piston valve of the present invention.

Reference numerals:

the gun comprises a gun body 100, a main through pipe 110, a stainless steel embedding pipe 111, a shunt cavity 120, a piston cavity 130, a spray amplitude adjusting cavity 140 and a spray adjusting knob 141; the spray cover assembly 200, the middle nozzle piece 210, the spray amplitude angle 220, the spray amplitude air passage 221, the spray amplitude nozzle 222 and the auxiliary atomization opening 223; a coating channel 300, a side air inlet joint 400, a lower air inlet joint 500 and a thimble 600; an air piston valve 700, a first connecting ring 710, a second sealing ring 720, a third sealing ring 730 and a connecting column 740; a diversion cover 800, a diversion hole 810 and a buffer ring 820; thimble guide 900, thimble spring 910, coating knob 920.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. Rather, the utility model can be practiced without these specific details, i.e., those skilled in the art can more effectively introduce the essential nature of their work to others skilled in the art using the description and presentation herein.

Furthermore, it should be noted that the terms "front side", "rear side", "left side", "right side", "upper side", "lower side", and the like used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from the geometric center of a specific part, respectively, and those skilled in the art should not understand that the technology beyond the scope of the present application is simply and innovatively adjustable in the directions.

If the description of "first", "second", etc. is used for the purpose of distinguishing technical features, it is not intended to indicate or imply relative importance or to implicitly indicate the number of indicated technical features or to implicitly indicate the precedence of the indicated technical features.

It should be understood that the detailed description and specific examples, while indicating the scope of the utility model, are intended for purposes of illustration only and are not intended to limit the scope of the utility model. Well-known manufacturing methods, control procedures, component dimensions, material compositions, pipe arrangements, etc., have not been described in detail since they are readily understood by those of ordinary skill in the art, in order to avoid obscuring the present invention.

Fig. 1 is a perspective view of an embodiment of the present invention, fig. 2 is a perspective view of another angle of the present invention, and referring to fig. 1 and 2, an embodiment of the present invention provides a low-pressure low-flow atomizing spray gun including a gun body 100, and a spray cap assembly 200 is provided on the gun body 100. Referring to fig. 3 and 4, a main pipe 110 and a thimble 600 are provided in the gun body 100, and a paint passage 300 is further provided in the gun body 100 to communicate with the main pipe 110.

Further, the spray cover assembly 200 includes a middle nozzle member 210, an output end of the main pipe 110 is communicated with the middle nozzle member 210, a piston cavity 130 is disposed at a rear side of the gun body 100, an air piston valve 700 is disposed in the piston cavity 130, a front side of the thimble 600 is inserted into the middle nozzle member 210, and a rear side of the thimble 600 is inserted into the air piston valve 700.

Still further, the piston chamber 130 is a linear chamber, the left and right sides of the front side of the piston chamber 130 are provided with side air inlet joints 400, the lower side of the piston chamber 130 is provided with a lower air inlet joint 500, and the lower air inlet joint 500 is located at the rear side of the side air inlet joint 400. The side air intake joint 400 and the lower air intake joint 500 can intake air simultaneously, and compared with the design of simply increasing the intake power or increasing the air inlets, the design can provide stable air flow to meet the requirement.

The linear cavity design of the piston cavity 130 is beneficial to increasing the internal space of the gun body 100 and is large, the air inlet and outlet spaces of the part structure part are large, the side air inlet connector 400 and the lower air inlet connector 500 can be distributed more reasonably, more air can be stored, the obstruction to air flow can be reduced, the pressure is kept stable, and the air flow is more uniform and smooth.

The above disclosure of a low pressure low flow atomizing spray gun is only a preferred embodiment of the present invention, and is only for the purpose of illustrating the technical solution of the present invention, and not for the purpose of limiting the same. It will be understood by those skilled in the art that the foregoing technical solutions may be modified or supplemented by the prior art, or some of the technical features may be replaced by equivalents; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Reference will now be made in detail to some embodiments, wherein "an embodiment" is referred to herein as a particular feature, structure, or characteristic that may be included in at least one implementation of the present application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Furthermore, the details representative of one or more embodiments are not necessarily indicative of any particular order, nor are they intended to be limiting.

In some embodiments, the present atomizing spray gun is adapted for use in manual, automatic spray gun configurations.

In some embodiments, referring to fig. 5, the main tube 110 includes a front diversion cavity 120, and a diversion cover 800 is disposed in the diversion cavity 120. Referring to fig. 6, the diverting cover 800 is provided with a diverting hole 810. The distribution chamber 120 and the distribution holes 810 of the distribution cover 800 can make the air flow more uniform and stable after passing through. And the space of the shunting cavity 120 in the spray cover is large enough, so that the paint can be uniformly scattered under the condition of lower air inlet pressure, the spray amplitude length meets the requirement, the atomization is soft, the particles are fine, the coating is less in flying, and the coating adhesion rate is improved.

In some embodiments, the shunting cover 800 is provided with a buffering ring 820, and a gap is left between the buffering ring 820 and the inner wall of the shunting cavity 120, so as to buffer the sprayed paint and make the spraying effect more uniform.

In some embodiments, the nozzle cap assembly 200 includes a nozzle horn 220, a nozzle duct 221 is disposed in the nozzle horn 220, a nozzle 222 is disposed on the nozzle horn 220, a nozzle chamber 140 is disposed on the gun body 100, the nozzle chamber 140 is communicated with the nozzle duct 221, and a nozzle adjustment knob 141 is disposed on the nozzle chamber 140. In practice, the spray adjustment knob 141 is quick to adjust, requiring only 180 of rotation to fully open or close.

In some embodiments, an auxiliary atomization opening 223 is disposed between the middle nozzle member 210 and the nozzle orifice 222 to improve atomization.

In some embodiments, the stainless steel inlaid pipe 111 is disposed in the main pipe 110, so as to improve the corrosion resistance of the main pipe 110 and better adapt to different paint characteristics.

In some embodiments, referring to fig. 7, the air piston valve 700 includes a first sealing ring 710, a second sealing ring 720, and a third sealing ring 730. The first connecting ring 710 and the second sealing ring 720, the second sealing ring 720 and the third sealing ring 730 are connected through a connecting column 740, and gaps are reserved between the connecting columns 740. The space between the first connecting ring 710 and the second sealing ring 720 corresponds to the position of the air inlet joint 400 at the side, and the space between the second sealing ring 720 and the third sealing ring 730 corresponds to the position of the air inlet joint 500 at the lower side, so that the air inlet of the air inlet joint 400 at the side and the air inlet joint 500 at the lower side can be realized by the design, the air flow interference can not occur, and the spraying liquid can be uniformly output under the condition of low-pressure air outlet.

In some embodiments, plunger cavity 130 is provided with a spike guide 900, a spike spring 910, and a paint knob 920 on the rear side. The thimble guide base 900 is used for guiding the thimble 600 and the air piston valve 700, and the thimble spring 910 and the coating knob 920 are matched to adjust the thrust of the thimble 600, so as to realize the precise control effect.

The present invention can be modified and adapted appropriately from the above-described embodiments, according to the principles described above. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and variations of the present invention should fall within the scope of the claims of the present invention.

Claims

1. The utility model provides a low pressure low flow atomizing spray gun, includes the rifle body (100), be provided with on the rifle body (100) and spout lid subassembly (200), be provided with main siphunculus (110) and thimble (600) in the rifle body (100), still be provided with on the rifle body (100) coating passageway (300) with main siphunculus (110) intercommunication, its characterized in that:

the spray cover assembly (200) comprises a middle nozzle piece (210), the output end of the main through pipe (110) is communicated with the middle nozzle piece (210), a piston cavity (130) is arranged on the rear side of the gun body (100), an air piston valve (700) is arranged in the piston cavity (130), the front side of the ejector pin (600) penetrates into the middle nozzle piece (210), and the rear side of the ejector pin (600) penetrates into the air piston valve (700);

the piston cavity (130) is a linear cavity, side air inlet joints (400) are arranged on the left side and the right side of the front side of the piston cavity (130), a lower air inlet joint (500) is arranged on the lower side of the piston cavity (130), and the lower air inlet joint (500) is located on the rear side of the side air inlet joint (400).

2. A low pressure low flow atomizing spray gun as set forth in claim 1 wherein: the main through pipe (110) comprises a shunting cavity (120) on the front side, a shunting cover (800) is arranged in the shunting cavity (120), and a shunting hole (810) is formed in the shunting cover (800).

3. A low pressure low flow atomizing spray gun in accordance with claim 2 wherein: a buffering ring (820) is arranged on the flow dividing cover (800), and a gap is reserved between the buffering ring (820) and the inner wall of the flow dividing cavity (120).

4. A low pressure low flow atomizing spray gun as set forth in claim 1 wherein: the spray cover assembly (200) comprises a spray width angle (220), a spray width air passage (221) is arranged in the spray width angle (220), a spray width nozzle (222) is arranged on the spray width angle (220), a spray width adjusting cavity (140) is arranged on the gun body (100), the spray width adjusting cavity (140) is communicated with the spray width air passage (221), and a spray width adjusting knob (141) is arranged on the spray width adjusting cavity (140).

5. A low pressure low flow atomizing spray gun in accordance with claim 4 wherein: an auxiliary atomizing opening (223) is arranged between the middle nozzle piece (210) and the spray width nozzle (222).

6. A low pressure low flow atomizing spray gun as set forth in claim 1 wherein: a stainless steel inlaid pipe (111) is arranged in the main through pipe (110).

7. A low pressure low flow atomizing spray gun as set forth in claim 1 wherein: the air piston valve (700) comprises a first connecting ring (710), a second sealing ring (720) and a third sealing ring (730), wherein the first connecting ring (710) and the second sealing ring (720) are connected with each other, the second sealing ring (720) and the third sealing ring (730) are connected with each other through a connecting column (740), and a gap is reserved between the connecting columns (740).

8. A low pressure low flow atomizing spray gun as set forth in claim 1 or 7 wherein: and a thimble guide seat (900), a thimble spring (910) and a coating knob (920) are arranged on the rear side of the piston cavity (130).