An automatic spray gun

Abstract

The invention discloses an automatic spray gun, comprising a gun body, wherein a horizontal through pipe is arranged in the center of the gun body, a nozzle assembly is arranged at the front end of the gun body, and a diverter ring cover is arranged between the nozzle assembly and the front end of the gun body; a paint inlet pipe, a main air inlet pipe, a spray width air inlet pipe and an atomizing air inlet pipe are arranged on the outer wall of the gun body. The automatic spray gun divides the air intake of the spray width air inlet pipe and the atomizing air inlet pipe into two paths, one path controls the air volume for the spray width and the atomizing air volume through different control knobs, and the other path is used to control the stroke of the ejector pin, so that the horizontal stroke of the ejector pin can adapt to different spray width air volumes and atomizing air volumes, so that the paint spraying volume reaches the best, the paint is less scattered, the adhesion rate is high, and the advantages of saving paint, saving cost and protecting the environment are achieved.

Description

Technical Field

[0001] The invention relates to the field of spray guns, in particular to an automatic spray gun. Background Art

[0002] The paint liquid is transported to the automatic spray gun through a pump, and the needle valve is opened by compressed air to start the liquid spraying; at the same time, the compressed air is sprayed through the nozzle (21) by opening the valve switch, and the liquid is atomized by the compressed air and then sprayed onto the surface to be sprayed.

[0003] An automatic spray gun is disclosed in Chinese patent CN2017202544894, which discloses a technical solution for an automatic spray gun. However, the spray gun cannot solve the problem of stable spray width and atomization effect when the amount of paint sprayed is very small. Summary of the invention

[0004] In order to overcome the deficiencies of the prior art, the present invention provides an automatic spray gun with compact structure, simple structure, stable spray width and atomization effect.

[0005] The technical solution adopted by the present invention to solve its technical problem is:

[0006] An automatic spray gun comprises a gun body, wherein a horizontal through-tube is arranged in the center of the gun body, a nozzle assembly is arranged at the front end of the gun body, and a spray air passage and an atomizing air passage are arranged on the nozzle assembly; a diverter ring cover is arranged between the nozzle assembly and the front end of the gun body, an air outlet hole connected with the spray air passage is opened on the circular surface of the diverter ring cover, and the hollow part of the diverter ring cover corresponds to the position of the horizontal through-tube; a paint control assembly is arranged at the rear end of the gun body, and a ejector assembly controlled by the paint control assembly is arranged on the horizontal through-tube, a piston chamber is formed between the ejector assembly and the rear end of the gun body, and the front end of the ejector assembly Insert into the nozzle assembly; a paint inlet pipe, a main air inlet pipe, a spray air inlet pipe and an atomizing air inlet pipe are provided on the outer wall of the gun body; the paint inlet pipe is connected with the horizontal through pipe, the main air inlet pipe is opened at the rear end of the gun body and is connected with the piston cavity; the spray air inlet pipe is opened at the rear end of the gun body and is connected with the piston cavity, the spray air inlet pipe is opened at the front end of the gun body on the back side of the air outlet after passing through the control knob I; the atomizing air inlet pipe is opened at the rear end of the gun body and is connected with the piston cavity, the atomizing air inlet pipe is opened at the front end of the horizontal through pipe after passing through the control knob II and is connected with the atomizing airway.

[0007] As a preferred option, the nozzle assembly includes a nozzle and a spray cover covering the front end of the nozzle, the spray cover is symmetrically provided with spray angles, the spray angles are provided with spray outlets facing inward, the spray outlets are connected with the spray airway, and the spray cover is respectively provided with a circular nozzle and a hole-shaped nozzle symmetrically arranged on both sides of the circular nozzle; the nozzle is divided into a nozzle tube and a ring plate matched with the hollow part of the diversion ring cover, the front end of the nozzle tube is inserted into the circular nozzle, and the rear end is inserted into the horizontal through pipe, a gap is formed between the front end of the nozzle tube and the circular nozzle, and an air hole connected with the atomization airway is opened on the ring plate, and the atomization airway is connected with the circular nozzle and the hole-shaped nozzle.

[0008] As a preferred option, the paint control assembly includes a knob guide seat threadedly connected to the rear end of the gun body, a knob ejector pin mounted on the knob guide seat and cooperating with the ejector pin assembly, and an ejector spring is installed between the ejector pin assembly and the knob ejector pin.

[0009] As a preferred option, the ejector assembly includes an ejector clamp inserted into the horizontal through-tube, an ejector inserted into the ejector clamp, and an ejector clamp seat for fixing the ejector, the ejector clamp seat is located at the rear end of the gun body and closes the rear end of the gun body, and the ejector generates horizontal movement in the horizontal through-tube driven by the ejector clamp seat.

[0010] As a preferred option, the diverter ring cover is provided with an air-conducting pressure-reducing groove.

[0011] As a preferred option, there are two paint inlet pipes.

[0012] The beneficial effects of the present invention are as follows: the automatic spray gun divides the air intake of the spray width air intake pipe and the atomization air intake pipe into two paths, one path controls the air volume for spray width and atomization through different control knobs, and the other path is used to control the stroke of the ejector pin, so that the horizontal stroke of the ejector pin can adapt to different spray width air volumes and atomization air volumes, so that the paint spraying volume reaches the best, the paint is less dispersed, and the adhesion rate is high, thereby achieving the advantages of saving paint, saving costs, and protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0014] Figure 1 It is a three-dimensional schematic diagram of the present invention;

[0015] Figure 2 It is a three-dimensional cross-sectional schematic diagram of the present invention;

[0016] Figure 3 is a three-dimensional schematic diagram of a paint inlet pipe of the present invention;

[0017] Figure 4 is a three-dimensional schematic diagram of a spray width air intake pipe of the present invention;

[0018] Figure 5 is a three-dimensional schematic diagram of the main air intake pipe of the present invention;

[0019] Figure 6 It is a three-dimensional schematic diagram of the atomizing air intake pipe of the present invention;

[0020] Figure 7 It is a partial enlarged schematic diagram of the spray width air intake pipe of the present invention;

[0021] Figure 8 It is a partial enlarged schematic diagram of the atomizing air intake pipe of the present invention;

[0022] Fig. 9 It is a schematic diagram of a shunt ring cover installed at the front end of the gun body of the present invention;

[0023] Fig.10 It is a three-dimensional schematic diagram of the front end of the gun body of the present invention without a diverter ring cover;

[0024] Fig.11 It is a three-dimensional schematic diagram of a spray cover of the present invention. DETAILED DESCRIPTION

[0025] Reference Figure 1-Figure 11 An automatic spray gun comprises a gun body 1, a horizontal through pipe 11 is arranged in the center of the gun body 1, a nozzle assembly 2 is arranged at the front end of the gun body 1, and a spray air passage 201 and an atomizing air passage 202 are arranged on the nozzle assembly 2; a diverter ring cover 3 is arranged between the nozzle assembly 2 and the front end of the gun body 1, and air is diverted into a spray airflow and an atomizing airflow through the diverter ring cover 3, and an air outlet 31 connected with the spray air passage 201 is opened on the outer edge of the diverter ring cover 3, and the hollow part of the diverter ring cover 3 corresponds to the position of the horizontal through pipe 11, a paint control assembly 4 is arranged at the rear end of the gun body 1, a piston chamber 101 is formed between the paint control assembly 4 and the rear end of the gun body 1, and a ejector assembly 5 controlled by the paint control assembly 4 is arranged on the horizontal through pipe 11, and the ejector assembly 5 and the rear end of the gun body 1 form a piston chamber 101, and the front end of the ejector assembly 5 is inserted into the nozzle assembly 2; the outer wall of the gun body 1 is provided with a paint inlet pipe 12, a main air inlet pipe 13, a spray width air inlet pipe 14, and an atomizing air inlet pipe 15; when in use, the paint is introduced into the gun body 1 through the paint inlet pipe 12, and two paint inlet pipes 12 can be used, and the gas is introduced into the gun body 1 through the spray width air inlet pipe 14 and the atomizing air inlet pipe 15, and the paint atomization and the spray width of the paint during spraying are controlled by the gas. At the same time, air is introduced into the piston chamber 101 through the main air inlet pipe 13, and the ejector assembly 5 is separated from the nozzle assembly 2 by pushing the ejector assembly 5, so that the paint can be sprayed out from the nozzle assembly 2 for spraying operation.

[0026] like Figure 3 As shown, the paint inlet pipe 12 is connected to the horizontal through pipe 11. After the paint enters the horizontal through pipe 11, it moves toward the tip of the nozzle 21 and is sprayed out.

[0027] like Figure 4-Figure 8 As shown, the main air inlet pipe 13 is opened at the rear end of the gun body 1 and is connected to the piston chamber 101; after the air enters the gun body 1 through the spray air inlet pipe 14, there are two directions, one way enters the piston chamber 101, and the other way passes through the control knob Ⅰ16 and the amount of entry is controlled by the control knob Ⅰ16, and then enters the spray air channel 201 on the nozzle assembly 2 through the air outlet 31 on the splitter ring cover 3. Two air guide pressure relief grooves 32 are designed on the splitter ring cover 3, which can reduce the pressure of the air, make the air flow smoother and more uniform, and reduce the turbulence; after the air enters the gun body 1 through the atomization air inlet pipe 15, there are two directions, one way enters the piston chamber 101, and the other way passes through the control knob Ⅱ17 and the amount of entry is controlled by the control knob Ⅱ17, and then enters the atomization air channel 202 on the nozzle assembly 2 after passing through the hollow part of the splitter ring cover 3;

[0028] like Figure 2 , Figure 4-Figure 8 As shown, the path of air on the nozzle assembly 2 is further described. The nozzle assembly 2 includes a nozzle 21 and a spray cover 22 covering the front end of the nozzle 21; wherein the spray cover 22 is respectively provided with a circular nozzle 221 and a hole-shaped nozzle 222 symmetrically arranged on both sides of the circular nozzle 221. The nozzle 21 is divided into a nozzle tube 211 and a ring plate 212 matched with the hollow part of the diversion ring cover 3. The front end of the nozzle tube 211 is inserted into the circular nozzle 221, and the rear end is inserted into the horizontal through pipe 11. A gap is formed between the front end of the nozzle tube 211 and the circular nozzle 221. The ring plate 212 is provided with a circular nozzle 221 and a circular nozzle 221. The plate 212 is provided with an air vent 213 connected to the atomizing air passage 202, and the atomizing air passage 202 is connected to the circular nozzle 221 and the hole-shaped nozzle 222; when in use, the paint passes through the horizontal through pipe 11 and the nozzle tube 211 and is ejected from the tip of the nozzle tube 211, and the air for atomization enters the front end of the gun body 1 and passes through the hollow part of the diverter ring cover 3 and the air vent 213 on the ring plate 212 in turn into the atomizing air passage 202, and is ejected from the circular nozzle 221 and the hole-shaped nozzle 222, so that the air and the paint are mixed to form an atomization effect;

[0029] like Fig.11 As shown, a spray angle 23 is symmetrically provided on the spray cover 22, and a spray nozzle 231 facing inward is provided on the spray angle 23. The spray nozzle 231 is connected to the spray air channel 201, and the air for controlling the spray width enters the front end of the gun body 1 through the air outlet 31 on the outer edge of the diverter ring cover 3, enters the spray air channel 201, and is sprayed out from the spray nozzle 231 on the spray angle 23; the atomized paint is blown away to form a fan-shaped atomization effect, thereby changing the spray width.

[0030] like Figure 2 , Figure 4-Figure 8As shown, the activities between the paint control assembly 4 and the ejector assembly 5 are further described. The ejector assembly 5 includes an ejector clamp 51 inserted into the horizontal through pipe 11, an ejector 52 inserted into the ejector clamp 51, and an ejector clamp seat 53 for fixing the ejector 52. The ejector 52 is inserted into the nozzle tube 211 and closes the top end of the nozzle tube 211. The ejector clamp seat 53 is located at the rear end of the gun body 1. The ejector clamp 51 closes the rear end of the horizontal through pipe 11 to prevent the paint from leaking out from the rear end. When the air used to control the activity of the ejector 52 After entering the piston chamber 101 through the main air intake pipe 13, the spray air intake pipe 14, and the atomizing air intake pipe 15, the air pressure in the piston chamber 101 increases, which pushes the ejector pin clamping seat 53 to move backward, so that the ejector pin 52, driven by the ejector pin clamping seat 53, generates a backward horizontal movement in the horizontal through pipe 11, and a gap is formed between the ejector pin 52 and the inner wall of the nozzle pipe 211, so that the paint in the nozzle pipe 211 flows out; when the air intake of the main air intake pipe 13, the main air intake pipe 13, the spray air intake pipe 14, and the atomizing air intake pipe 15 is stopped, When the air pressure in the piston chamber 101 is less than the elastic restoring force of the ejector spring 43 installed between the ejector clamping seat 53 and the knob ejector 42, the ejector spring 43 pushes the ejector clamping seat 53 back to its original position, so that the paint supply stops; when the control knob I 16 and the control knob II 17 are rotated separately or simultaneously, and the air intake of the main air intake pipe 13 is maintained, the pressure in the piston chamber 101 can be flexibly controlled, such as rotating the control knob I 16 and the control knob II 17 simultaneously, respectively increasing the air in the atomizing air path and the spray width air path The amount of air entering the piston chamber 101 is reduced, and the pressure in the inner chamber is reduced accordingly, so that the ejector pin 52 is horizontally displaced under the drive of the ejector pin clamping seat 53, so that the gap between the ejector pin 52 and the inner wall of the nozzle tube 211 is reduced, and the amount of paint sprayed is very small. However, due to the increase in the amount of air entering the atomizing air path and the air entering the spray air path, the paint spraying effect maintains a large spray area and a uniform atomization effect; the paint sprayed by the spray gun is less scattered and has a high adhesion rate, thereby achieving the advantages of saving paint, saving costs, and protecting the environment.

[0031] In order to further control the amount of paint discharged, that is, the stroke of the ejector pin 52 leaving the top end port of the nozzle tube 211, the knob ejector pin 42 mounted on the knob guide seat 41 is rotated to compress the ejector pin spring 43, and at the same time, the distance between the upper limit ejector pin 44 of the knob ejector pin 42 and the ejector pin clamping seat 53 is reduced or increased to control the stroke of the ejector pin clamping seat 53, so that the stroke of the ejector pin 52 leaving the top end port of the nozzle tube 211 is controllable, thereby realizing the controllable amount of paint discharged; when the control knob I 16 and the control knob II 17 are rotated at the same time, the air intake in the atomizing air path and the air intake in the spray air path are reduced respectively, and the air intake in the main air intake pipe 13 is maintained, so that the piston chamber 101 As the amount of air entering the spray chamber increases, the pressure in the inner cavity increases accordingly. Due to the limitation of the limiting ejector pin 44, the horizontal displacement of the ejector pin 52 driven by the ejector pin clamping seat 53 is limited, so that the increase in the amount of paint sprayed can be controlled, avoiding excessive paint volume, resulting in poor atomization effect, uneven paint dispersion, low adhesion rate, and avoidance of paint waste; and by rotating the control knobs Ⅰ16 and Ⅱ17 respectively, the air intake in the atomization air path and the air intake in the spray air path can be controlled respectively, and the air volume and pressure in the air pressure chamber are kept constant, thereby maintaining the stability of the paint spray amount, making the paint atomization effect and the fan-shaped atomization effect stable, and ensuring the final atomization dispersion effect and adhesion rate of the paint.

[0032] According to the above principle, the present invention can also make appropriate changes and modifications to the above implementation. Therefore, the present invention is not limited to the specific implementation disclosed and described above, and some modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention.

Claims

1. An automatic spray gun, characterized in that: The invention comprises a gun body (1), wherein a horizontal through-tube (11) is provided in the center of the gun body (1), a nozzle assembly (2) is provided at the front end of the gun body (1), and a spray air passage (201) and an atomizing air passage (202) are provided on the nozzle assembly (2); a flow dividing ring cover (3) is provided between the nozzle assembly (2) and the front end of the gun body (1), and an air outlet hole (31) communicating with the spray air passage (201) is provided on the circular surface of the flow dividing ring cover (3), and the hollow part of the flow dividing ring cover (3) corresponds to the position of the horizontal through-tube (11), and the gun body (1) A paint control assembly (4) is installed at the rear end, and a pin assembly (5) controlled by the paint control assembly (4) is installed on the horizontal through pipe (11). A piston chamber (101) is formed between the pin assembly (5) and the rear end of the gun body (1), and the front end of the pin assembly (5) is inserted into the nozzle assembly (2); a paint inlet pipe (12), a main air inlet pipe (13), a spray air inlet pipe (14), and an atomization air inlet pipe (15) are provided on the outer wall of the gun body (1). The paint inlet pipe (12) and the horizontal through pipe (11) are connected to each other. The main air inlet pipe (13) is opened at the rear end of the gun body (1) and is connected to the piston chamber (101); the spray air inlet pipe (14) is opened at the rear end of the gun body (1) and is connected to the piston chamber (101); the spray air inlet pipe (14) is opened at the front end of the gun body (1) on the back side of the air outlet (31) after passing through the control knob I (16); the atomization air inlet pipe (15) is opened at the rear end of the gun body (1) and is connected to the piston chamber (101); the atomization air inlet pipe (15) is opened at the rear end of the gun body (1) and is connected to the piston chamber (101); the atomization air inlet pipe (15) is opened after passing through the control knob II (17) The ejector assembly (5) is located at one side of the front end of the horizontal through pipe (11) and is in communication with the atomizing airway (202); the ejector assembly (5) comprises an ejector fastener (51) inserted into the horizontal through pipe (11), an ejector (52) inserted into the ejector fastener (51), and an ejector fastener seat (53) for fixing the ejector (52); the ejector fastener seat (53) is located at the rear end of the gun body (1) and closes the rear end of the gun body (1); the ejector (52) generates horizontal movement in the horizontal through pipe (11) under the drive of the ejector fastener seat (53).

2. An automatic spray gun according to claim 1, characterized in that: The nozzle assembly (2) comprises a nozzle (21), a spray cover (22) covering the front end of the nozzle (21), the spray cover (22) being symmetrically provided with spray angles (23), the spray angles (23) being provided with spray outlets (231) facing inward, the spray outlets (231) being communicated with the spray air passage (201), the spray cover (22) being respectively provided with circular outlets (221) and hole-shaped outlets (222) symmetrically provided on both sides of the circular outlet (221); the nozzle (21) being symmetrically provided with a spray angle (23) and a spray outlet (231) facing inward, the spray outlets (231) being communicated with the spray air passage (201); The invention comprises a nozzle tube (211) and a ring plate (212) matched with the hollow part of the diverter ring cover (3); the front end of the nozzle tube (211) is inserted into the circular nozzle opening (221), and the rear end is inserted into the horizontal through pipe (11); a gap is formed between the front end of the nozzle tube (211) and the circular nozzle opening (221); a vent hole (213) connected to the atomizing air passage (202) is formed on the ring plate (212); and the atomizing air passage (202) is connected to the circular nozzle opening (221) and the hole-shaped nozzle opening (222).

3. An automatic spray gun according to claim 1, characterized in that: The paint control assembly (4) comprises a knob guide seat (41) threadedly connected to the rear end of the gun body (1), a knob ejector pin (42) mounted on the knob guide seat (41) and cooperating with the ejector pin assembly (5), and an ejector pin spring (43) is mounted between the ejector pin assembly (5) and the knob ejector pin (42).

4. An automatic spray gun according to claim 1, characterized in that: The diverter ring cover (3) is provided with an air-conducting pressure-reducing groove (32).

5. An automatic spray gun according to claim 1, characterized in that: There are two paint inlet pipes (12).

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