阅读说明：本技术 喷漆枪的喷嘴结构 (Nozzle structure of paint spray gun ) 是由 施念祖 于 2020-07-02 设计创作，主要内容包括：本发明公开了一种喷漆枪的喷嘴结构,其喷嘴的前端设一喷孔,并以该喷孔为中心往前端向外扩张设一导引环面,该导引环面与该喷孔间形成45度～75度的导引夹角,且该喷嘴由前端外周贯穿至该导引环面等距设有数个呈U形状的空气弧槽,借此,利用空气弧槽U形设计形成的等宽槽径,让高压气体通过空气弧槽时的流量一致,进而增加高压气体通过以及导出的流量,增加油漆颜料的碰撞分解机会,令油漆颜料在受到充足的高压气体推挤带动下分子能更为细致,同时加大油漆颜料的喷出流量,确实将油漆颜料从喷嘴前端导引带出,大幅提升喷漆效率,保证喷漆作业的均匀度。(The invention discloses a nozzle structure of a paint spray gun, wherein the front end of the nozzle is provided with a spray hole, a guide ring surface is outwards expanded from the spray hole to the front end, a guide included angle of 45-75 degrees is formed between the guide ring surface and the spray hole, and a plurality of U-shaped air arc grooves are equidistantly arranged from the periphery of the front end of the nozzle to the guide ring surface, so that the equal-width groove diameter formed by the U-shaped design of the air arc grooves is utilized to ensure that the flow of high-pressure gas is consistent when the high-pressure gas passes through the air arc grooves, thereby increasing the flow of the high-pressure gas passing and guiding out, increasing the collision decomposition chance of the paint pigment, leading the paint pigment to be more delicate under the pushing and pushing of sufficient high-pressure gas, meanwhile, the spraying flow of the paint pigment is increased, the paint pigment is guided out from the front end of the nozzle, the paint spraying efficiency is greatly improved, and the uniformity of the paint spraying operation is ensured.)

1. A spray nozzle structure of a paint spray gun is characterized in that a spray hole is formed in the front end of the spray nozzle, a guide ring surface is arranged on the front end of the spray nozzle in an outward expanding mode by taking the spray hole as a center, a guide included angle (a) is formed between the guide ring surface and the spray hole, the angle of the guide included angle (a) ranges from 45 degrees to 75 degrees, and a plurality of U-shaped air arc grooves are formed in the spray nozzle in an equidistant mode from the periphery of the front end to the guide ring surface.

2. The nozzle arrangement of claim 1, wherein the angle (a) formed between the guide ring surface and the nozzle opening is 60 degrees.

3. The nozzle arrangement of a paint spray gun according to claim 1, wherein the length (b) of the air arc groove is between 2.5mm and 3.5 mm.

4. The nozzle structure of a paint spray gun according to claim 1, wherein the opening width (c) of the air arc groove is 0.8mm to 1.2 mm.

5. The nozzle arrangement of a paint spray gun according to claim 1, wherein the two sides of the air arc slot are parallel.

6. The nozzle structure of claim 1, wherein the two sides of the air arc groove are non-parallel and have an outward-extending included angle (e), and the angle of the outward-extending included angle (e) is between 1 degree and 9 degrees.

7. The nozzle structure of claim 1, wherein the nozzle is further covered by an air cap when the nozzle is mounted on a paint spray gun, the air cap has a through hole at the center thereof, the front end of the nozzle forms a protruding section (f) outside the through hole, and the length of the protruding section (f) is between 0.7mm and 1.2 mm.

8. The nozzle structure of claim 1, wherein the guiding ring surface of the nozzle extends forward and tapers to form an inner contracting ring surface, and a guiding angle (g) is formed between the inner contracting ring surface and the nozzle hole, and the guiding angle (g) is between 30 degrees and 45 degrees.

9. Nozzle arrangement for a paint spray gun according to claim 8, characterized in that the angle of the guide angle (g) is 38 degrees.

10. The nozzle arrangement of claim 1, wherein the air arc slot has an R-angle at both ends of the bottom, the R-angle being between 0.2mmR and 0.5 mmR.

11. The nozzle arrangement of a paint spray gun according to claim 10, wherein the R angle of the air arc groove has a dimension of 0.4 mmR.

Technical Field

The present invention relates to a nozzle, and more particularly, to a nozzle structure of a paint spray gun.

Background

Referring to fig. 12 to 16, a nozzle structure of a conventional paint spray gun includes a nozzle 30 having a front end provided with a discharge port 31, an inner periphery of the nozzle being expanded toward the front end with the discharge port 31 as a center to form a guide wall 32, and a plurality of V-shaped air grooves 33 being formed on the outer periphery of the nozzle 30 toward the guide wall 32 at the front end in a longitudinal direction; when the nozzle 30 is installed with a paint spraying gun 40, the front of the nozzle 30 is further covered and limited by an air cap 41, a through hole 411 is formed at the center of the front end of the air cap 41 for the front end of the nozzle 30 to pass through, and an annular slit 412 is formed between the front end of the nozzle 30 and the through hole 411 for guiding the air flow out and mixing the paint pigment A guided out from the spray opening 31, thereby guiding the paint pigment A out for painting.

The known structure can be seen to have some disadvantages, mainly for the following reasons: the air slot 33 around the nozzle 30 is V-shaped, that is, a tapered slot with a narrow front part and a wide rear part is formed in the air slot 33, so that when the high-pressure gas B for painting passes through, the high-pressure gas B firstly contacts with the tapered slot of the air slot 33, the high-pressure gas B is already limited in flow when initially passing through the air slot 33, the flow rate of the passing air flow is greatly reduced, the power of the paint pigment a taken out is affected, the amount of sprayed pigment is reduced, the probability of collision and splitting of the pigment is reduced, the paint molecules are coarse and the painting effect is poor, and when the air flow rate is insufficient, the pigment can flow back, and further attach to the air cap 41 or pass through the through hole 411, the annular slot 412 is blocked seriously, the painting operation is affected in a vicious circle, and the practicability is not achieved.

In view of the above, the present inventors have made various experiments on the manufacturing, development and design of related products for many years, and have made detailed design and careful evaluation to achieve the above objectives, and finally have obtained a practical invention.

Disclosure of Invention

The present invention is directed to a nozzle structure of a paint spray gun, which comprises:

the nozzle has a nozzle hole in the front end, a guide ring surface extending outwards from the nozzle hole to the front end, and a guide included angle a formed between the guide ring surface and the nozzle hole, wherein the angle of the guide included angle a is 45-75 degrees, and a plurality of U-shaped air arc grooves are equidistantly arranged from the outer periphery of the front end to the guide ring surface.

Preferably, the angle of the guiding included angle a formed between the guiding ring surface and the nozzle hole is 60 degrees.

Preferably, the length b of the air arc groove is between 2.5mm and 3.5 mm.

Preferably, the width c of the opening of the air arc groove is between 0.8mm and 1.2 mm.

Preferably, two sides of the air arc groove are parallel.

Preferably, the two side edges of the air arc groove are not parallel and have an outward-expanding included angle e, and the angle of the outward-expanding included angle e is between 1 degree and 9 degrees.

Preferably, the nozzle is further covered by an air cap when being mounted with a paint spray gun, a through hole is formed in the center of the air cap for the front end of the nozzle to protrude through, a protruding section f is formed at the front end of the nozzle outside the through hole, and the length of the protruding section f is between 0.7mm and 1.2 mm.

Preferably, the guiding ring surface of the nozzle extends forward and tapers to form an inner contracting ring surface, a guiding included angle g is formed between the inner contracting ring surface and the spray hole, and the guiding included angle g is between 30 degrees and 45 degrees.

Preferably, the angle of the guiding angle g is 38 degrees.

Preferably, both ends of the bottom of the air arc groove are provided with R angles, and the size of the R angles is 0.2 mmR-0.5 mmR.

Preferably, the dimension of the R angle of the air arc groove is 0.4 mmR.

Compared with the prior art, the invention has the following effects: the front end periphery of this nozzle is equipped with the air arc groove that the several becomes the U-shaped, utilize the equal width groove footpath that air arc groove U-shaped design formed, the flow when letting high-pressure gas pass through the air arc groove is unanimous, and then increase the flow that high-pressure gas passes through and derives, increase paint pigment's collision decomposition chance, it can be more careful to make paint pigment receive sufficient high-pressure gas to push the molecule under the drive, increase paint pigment's blowout flow simultaneously, indeed take paint pigment out from the nozzle front end guide, promote the efficiency of spraying paint by a wide margin, guarantee the degree of consistency of the operation of spraying paint.

Drawings

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

FIG. 2 is a cross-sectional view of one embodiment of the present invention;

FIG. 3 is an enlarged partial cross-sectional view of the forward end of a nozzle in accordance with one embodiment of the present invention;

FIG. 4 is an enlarged partial side view of the forward end of a nozzle in accordance with one embodiment of the present invention;

FIG. 5 is an enlarged partial front view of the forward end of a nozzle in accordance with one embodiment of the present invention;

FIG. 6 is a schematic view of a paint gun according to an embodiment of the present invention in an installed and operating state;

FIG. 7 is an enlarged, fragmentary view of an embodiment of the present invention mounted to a spray gun;

FIG. 8 is a front view of the nozzle and air cap assembly of one embodiment of the present invention;

FIG. 9 is a perspective view of another embodiment of the present invention;

FIG. 10 is a cross-sectional view of another embodiment of the present invention;

FIG. 11 is an enlarged, fragmentary view of another embodiment of the present invention mounted with a spray gun;

FIG. 12 is a perspective view of a known nozzle;

FIG. 13 is an enlarged partial cross-sectional view of the front end of a known nozzle;

FIG. 14 is a schematic view of a conventional spray gun installed and in use;

FIG. 15 is an enlarged partial schematic view of a known installation with a spray gun;

fig. 16 is a front view of a known nozzle assembled with an air cap.

Symbolic illustration in the drawings:

(present invention)

10 a nozzle;

11, spraying holes;

12 a guide ring surface;

121 an inner contracted ring surface;

13 air arc grooves;

20 a paint spray gun;

21 an air cap;

211 perforating;

212 an annular slit;

a, paint pigment;

b, high-pressure gas;

a guiding included angle;

b, the length of the air arc groove;

c, the opening width of the air arc groove;

d is the spacing distance;

e, expanding an included angle outwards;

f, a convex section;

g, guiding an included angle;

(known)

30, a nozzle;

31 an ejection port;

32 guide the annular wall;

33 air slots;

40 spray guns;

41 air cap;

411 is perforated;

412 an annular slit;

a, paint pigment;

b, high-pressure gas.

Detailed Description

To further understand and appreciate the objects, features and functions of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings, in which:

firstly, referring to fig. 1, 2 and 3 in conjunction with fig. 4 and 5, a nozzle structure of a paint spray gun is disclosed, in which a nozzle hole 11 is formed at a front end of a nozzle 10, a guide ring surface 12 is outwardly expanded from the nozzle hole 11 to the front end, a guide included angle a is formed between the guide ring surface 12 and the nozzle hole 11, the angle of the guide included angle a is between 45 degrees and 75 degrees, the preferred angle of the guide included angle a is 60 degrees, and a plurality of air arc grooves 13 are formed in the nozzle 10, extending from the outer periphery to the front end, and penetrating through the guide ring surface 12.

The length b of the air arc groove 13 is between 2.5mm and 3.5mm, and the best air flow can be obtained.

The opening width c of the air arc groove 13 is between 0.8mm and 1.2mm, and the opening width c is preferably 1.0 mm. The center of the nozzle hole 11 at the front end of the nozzle 10 and the bottom surface of the air arc groove 13 have a spacing distance d, which is between 0.8mm and 1.2mm, so as to have better airflow guiding flow velocity, achieve better physical and chemical effects, and facilitate cleaning.

The two sides of the air arc groove 13 are parallel.

The two side edges of the air arc groove 13 are not parallel and have an outward-expanding included angle e, and the angle of the outward-expanding included angle e is between 1 degree and 9 degrees.

The two ends of the bottom of the air arc groove 13 are provided with an angle R, the size of the angle R is between 0.2mmR and 0.5mmR, namely the radius of the arc angle of the angle R is between 0.2mm and 0.5mm, the size of the angle R is 0.4mmR as the best, namely the radius of the arc angle of the angle R is 0.4 mm.

Referring to fig. 6, 7 and 8, the nozzle 10 and a paint spray gun 20 are further covered by an air cap 21 when they are installed, a through hole 211 is formed in the center of the air cap 21 for the front end of the nozzle 10 to protrude through, and a protruding section f is formed at the front end of the nozzle 10 outside the through hole 211, the length of the protruding section f is between 0.7mm and 1.2mm, and an annular slit 212 is formed between the front end of the nozzle 10 and the through hole 211.

With reference to fig. 6, 7 and 8, when the paint spraying gun 20 is used for spraying paint, the paint pigment a is sprayed out through the spraying hole 11, and the high-pressure air B is guided out through the annular slit 212 formed between the outer periphery of the nozzle 10 and the through hole 211 of the air cap 21, so that the paint pigment a is guided out and mixed by the high-pressure air B to achieve the purpose of spraying paint, when the high-pressure air passes through the annular slit 212, because the outer periphery of the front end of the nozzle 10 is provided with a plurality of U-shaped air arc grooves 13, the constant-width groove diameter formed by the U-shaped design of the air arc grooves 13 enables the flow rate of the high-pressure air B passing through the air arc grooves 13 to be consistent, thereby increasing the flow rate of the high-pressure air B passing through and guiding out, increasing the collision and decomposition chance of the paint pigment, enabling the paint pigment a to be more finely molecular under the pushing of sufficient high-pressure air, and increasing the spraying flow rate of, the paint pigment A is guided and taken out from the front end of the nozzle 10, so as to avoid remaining on the periphery of the air cap 21 or between the annular slits 212, greatly improve the paint spraying efficiency and ensure the uniformity of the paint spraying operation.

In addition, when the paint spraying device is used, the paint can generate an initial materialization effect by using the low-pressure air of 7.5psi, and the paint can generate the initial materialization effect by using the traditional method which needs 14.5psi, so that the paint spraying device can also be applied to the paint spraying operation of the low-pressure air, and the practicability of the structure is greatly improved.

In another embodiment of the structure, referring to fig. 9, 10 and 11, the guiding ring surface 12 of the nozzle 10 further extends forward and is tapered to have an inner contracting ring surface 121, a guiding included angle g is formed between the inner contracting ring surface 121 and the nozzle hole 11, the guiding included angle g is between 30 degrees and 45 degrees, and the optimal angle of the guiding included angle g is 38 degrees, so that the front end of the nozzle 10 has the guiding ring surface 12 and the inner contracting ring surface 121 with different angles; when the nozzle 10 and the paint gun 20 are installed, they are further covered by the air cap 21, the through hole 211 of the air cap 21 is used for the front end of the nozzle 10 to protrude out, and the front end of the nozzle 10 forms a protruding section f outside the through hole 211, the length of the protruding section f is between 0.7mm and 1.2 mm.

The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the invention; all equivalent changes and modifications made according to the scope of the claims of the present invention should be covered by the present invention.