SPRAY GUN NOZZLE

Abstract

A spray gun nozzle is provided, including: a hood located outside a central nozzle and connected to a spray gun; an annular snout sleeved on the hood and connected to the hood, wherein the annular spout includes: a first pipe body; a second pipe body sleeved with the first pipe body; an annular bottom surface connected with an end of the first pipe body and an end of the second pipe body, wherein the first pipe body, the second pipe body and the annular bottom surface form an annular cavity; and an annular spout air inlet provided on the annular bottom surface and communicated with the annular cavity; and an annular spout air inlet pipe connected with the annular spout air inlet.

Claims

1. A spray gun nozzle, comprising: a hood located outside a central nozzle and connected to a spray gun; an annular spout sleeved on the hood and connected to the hood, wherein the annular spout comprises: a first pipe body; a second pipe body sleeved with the first pipe body; an annular bottom surface connected with an end of the first pipe body and an end of the second pipe body, wherein the first pipe body, the second pipe body and the annular bottom surface form an annular cavity; and an annular spout air inlet provided on the annular bottom surface and communicated with the annular cavity; and an annular spout air inlet pipe connected with the annular spout air inlet.

2. The spray gun nozzle according to claim 1, wherein a diameter of the first pipe body is greater than a diameter of the second pipe body.

3. The spray gun nozzle according to claim 1, wherein a difference between a diameter of the first pipe body and a diameter of the second pipe body is 1 mm-3 mm.

4. The spray gun nozzle according to claim 1, wherein a number of the annular spout air inlet is at least two.

5. The spray gun nozzle according to claim 4, wherein the annular spout air inlets are distributed on the annular bottom surface evenly.

6. The spray gun nozzle according to claim 1, wherein an inner wall of the annular spout and an outer wall of the hood are provided with threads, and the annular spout and the hood are connected through the threads.

7. The spray gun nozzle according to claim 1, wherein an inner wall of the annular spout air inlet and an outer wall of the annular spout air inlet pipe are provided with threads, and the annular spout air inlet and the annular spout air inlet pipe are connected through the threads.

8. The spray gun nozzle according to claim 1, further comprising: a sealing pad provided between the annular spout air inlet and the annular spout air inlet pipe.

9. The spray gun nozzle according to claim 1, wherein the central nozzle is connected to a paint tank through a pipe.

10. The spray gun nozzle according to claim 1, further comprising: a central nozzle air inlet connected to an inner cavity of a gun body through a gun handle, wherein air is entered through the central nozzle air inlet to atomize a paint sprayed from the central nozzle.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0022] FIG. 1 is a schematic structural diagram of the present disclosure;

[0023] FIG. 2 is a schematic structural diagram of an annular spout.

REFERENCE NUMERALS

[0024] central nozzle 1; hood 2; annular spout 3; central nozzle air inlet 4; annular spout air inlet pipe 5; paint tank 6; gun handle 7; gun body 8; first pipe body 3-1; second pipe body 3-2; annular bottom surface 3-3; annular spout air inlet 3-4,

DETAILED DESCRIPTION OF EMBODIMENTS

[0025] The present disclosure will be further described in detail with reference to the accompanying drawings.

[0026] Spray guns have problems of paint escape and uneven spraying during the spraying processes. The embodiments of the present disclosure provide a spray gun nozzle. By adding an annular spout on a hood of the spray gun, an annular spray is formed, which serves as a protective airflow so as to prevent the central spray from entraining surrounding air and ensure a uniform radial speed distribution.

[0027] As shown in FIGS. 1-2, a spray gun nozzle provided by the embodiments of the present disclosure includes: a hood 2, an annular spout 3 and an annular spout air inlet pipe 5. The hood 2 is located outside a central nozzle 1 and is connected to a spray gun. The annular spout air inlet pipe 5 is connected to an annular spout air inlet 3-4. The central nozzle 1, the hood 2 and the annular spout 3 are arranged coaxially from the inside to the outside, The spray gun nozzle provided by the embodiments of the present disclosure further includes: a central nozzle air inlet 4 which is connected to an inner cavity of a gun body 8 through a gun handle 7, air is entered through the central nozzle air inlet to atomize a paint sprayed from the central nozzle.

[0028] The annular spout 3 includes: a first pipe body 3-1, a second pipe body 3-2, an annular bottom surface 3-3 and an annular spout air inlet 3-4, The first pipe body 3-1 is sleeved with the second pipe body 3-2. The annular bottom surface 3-3 is connected to an end of the first pipe body 3-1 and an end of the second pipe body 3-2, and the first pipe body 3-1, the second pipe body 3-2 and the annular bottom surface 3-3 form an annular cavity. The annular spout air inlet 3-4 is provided on the annular bottom surface 3-3, and the annular spout air inlet 3-4 is communicated with the annular cavity.

[0029] In the embodiments of the present disclosure, a diameter of the first pipe body 3-1 is greater than a diameter of the second pipe body 3-2. The first pipe body 3-1 and the second pipe body 3-2 are arranged coaxially, and each of the first pipe body 3-1 and the second pipe body 3-2 is connected to one side of the annular bottom surface 3-3.

[0030] In the embodiments of the present disclosure, an inner wall of the second pipe body 3-2 of the annular spout 3 and the hood 2 are provided with threads, and the annular spout 3 and the hood 2 are connected by the threads. In the present disclosure, the annular spout 3 is installed on the hood 2 of an existing air spray gun, and the threads are the key to connecting the annular spout 3 and the hood 2.

[0031] Further, an inner wall of the annular spout air inlet 3-4 and an outer wall of an annular spout air inlet pipe 5 are provided with threads, and the annular spout air inlet 3-4 and the annular spout air inlet pipe 5 are connected by the threads. At least two annular spout air inlets 3-4 are distributed on the annular bottom surface 3-3 evenly, so as to ensure a more even gas suction.

[0032] In the embodiments of the present disclosure, when the air spray gun is operating, the paint is sprayed out from the central nozzle 1 from a paint tank 6 through a pipe, air is sprayed out from the central nozzle air inlet 4 through the gun body 8, the central nozzle 1 forms a main jet, that is a central jet. A speed of the central jet is, for example, about 60 m/s, an operating temperature of the central jet is, for example, 2-4 atm, and a corresponding flow rate of the central jet is about 96 L/min

[0033] The diameter of the first pipe body 3-1 of the annular spout 3 is, for example, about 36 mm, the diameter of the second pipe body 3-2 is, for example, about 35 mm, and the first pipe body 3-1 and the second pipe body 3-2. form an annular air cavity of 1 mm. The annular spout 3 and the central nozzle 1 operate at the same time to form an annular jet with a speed of, for example, 60 m/s, The annular jet is sprayed to an operating surface through a hollow pipe, and may form an annular protective air flow surrounding the central nozzle 1, so as to prevent the central jet from exchanging momentum with ambient air, so that a radial speed of the central jet may be distributed evenly, and problems of escaping and polluting the environment may be reduced, thereby the spraying efficiency of the paint may be improved.

[0034] The beneficial effect of the present disclosure is: while the central nozzle is working, an annular air curtain is activated, the annular spout air inlet sucks air from an air intake device through the annular spout air inlet pipe. Air is entered into the annular cavity between the first pipe body and the second pipe body, and then sprayed from the annular cavity to formed the annular air curtain to the operating surface. An annular protective air flow may be formed surrounding the central nozzle, so as to prevent the central jet from exchanging momentum with ambient air, so that a radial speed of the central jet may be distributed evenly, and problems of escaping and polluting the environment may be reduced, thereby the spraying efficiency of the paint may be improved. The spray gun nozzle provided by the embodiments of the present disclosure solves problems of waste of paint due to paint escape, stuff harm and other issues, and may improve the efficiency of the painting operation. The technical processing of the spray gun nozzle provided by the embodiments of the present disclosure is easy to implement, and the production difficulty and cost are reduced.

[0035] The above-mentioned embodiments of the present disclosure do not constitute a limitation to the protection scope of the present disclosure. Any modifications and changes made based on the technical concept of the present disclosure should fall within the protection scope of the present disclosure.