Air atomization spray gun

Abstract

The utility model discloses an air atomization spray gun which comprises a main body, an air inlet mechanism, a liquid inlet mechanism and a spraying mechanism, wherein the air inlet mechanism, the liquid inlet mechanism and the spraying mechanism are arranged in the main body; the spraying mechanism comprises a gas pipe and a liquid pipe which are arranged on the main body, the liquid pipe and the gas pipe are coaxially arranged, and the liquid pipe is located on the inner side of the gas pipe; the liquid pipe and the gas pipe both extend out of the main body, and a bent section is arranged on an extending section outside the main body; wherein the gas pipe is communicated with an outlet of the gas channel in the main body; and the liquid pipe is communicated with the liquid channel in the main body. According to the air atomization spray gun, the gas pipe and the liquid pipe which are coaxially arranged are adopted in the spray mechanism, and the bent sections are arranged on the extending sections, extending out of the main body, of the gas pipe and the liquid pipe; the spraying angle of the air atomization spray gun is changed by selecting the gas pipe and the liquid pipe with different bending angles, so that the air atomization spray gun adapts to a specific spraying environment, and the application range of the air atomization spray gun is enlarged.

Description

Technical Field

[0001] The utility model relates to the technical field of atomizing spray guns, in particular to an air atomizing spray gun. Background Art

[0002] As the country attaches great importance to energy conservation and environmental protection and the people's demand for a high-quality living environment, the production requirements for air atomizing spray guns are getting higher and higher. At present, the common feedback from the market on the production process of air atomizing spray gun cylinders is: limited installation conditions, and the complex environment inside the pipeline and mold cannot meet the spray requirements.

[0003] Therefore, in order to solve the above problems, it is necessary to design a dual-fluid atomizing nozzle that is easy to install, has adjustable spray volume and spray particles, and is suitable for precise position spraying and specific environments with complex pipes and molds, inclination angles, and limited installation conditions. Utility Model Content

[0004] In order to overcome the deficiencies in the prior art, the utility model provides an air atomizing spray gun, which can be suitable for spraying work in different complex spraying environments and has a wider application range.

[0005] The technical solution of the utility model to solve the above technical problems is:

[0006] An air atomizing spray gun comprises a main body, an air inlet mechanism, a liquid inlet mechanism and a spray mechanism arranged in the main body, wherein the spray mechanism comprises a gas pipe and a liquid pipe arranged on the main body, wherein the liquid pipe is coaxially arranged with the gas pipe, and the liquid pipe is located on the inner side of the gas pipe; the liquid pipe and the gas pipe both extend to the outside of the main body, and a curved section is arranged on the extended section outside the main body; wherein the gas pipe is connected to the outlet of the gas channel in the main body; and the liquid pipe is connected to the liquid channel in the main body.

[0007] Preferably, the air intake mechanism comprises an upper cover and an air intake port arranged on the upper cover, wherein the upper cover is mounted on the main body, a gas flow channel is arranged on the upper cover, and the gas flow channel is connected to a gas channel in the main body.

[0008] Preferably, the liquid inlet mechanism comprises a liquid inlet provided on the main body, wherein the liquid inlet is provided on a side wall of the main body and communicates with a liquid channel on the main body.

[0009] Preferably, the main body is also provided with a liquid cap, an air pipe cap and a nut for mounting the liquid cap and the air pipe cap on the main body; wherein, the main body is provided with a first mounting groove for mounting the liquid cap, and the liquid cap is mounted in the first mounting groove; a first liquid pipeline is arranged in the liquid cap, a liquid inlay is arranged in the air pipe cap, and a gas pipeline and a second liquid pipeline are arranged in the liquid inlay; wherein, the second liquid pipeline is arranged in the middle of the liquid inlay; the gas pipelines are divided into multiple groups, and the multiple groups of gas pipelines are evenly arranged along the circumferential direction of the liquid inlay; the inlet of the first liquid pipeline is connected with the outlet of the liquid channel, and the outlet of the first liquid pipeline is connected with the inlet of the second liquid pipeline; the outlet of the second liquid pipeline is connected with the liquid pipe.

[0010] Preferably, the liquid inlet component also includes a piston shut-off needle and a valve opening mechanism for driving the piston shut-off needle to move to open the first liquid pipeline in the liquid cap, wherein the piston shut-off needle is installed in the main body through an elastic component; the elastic force of the elastic component prompts the piston shut-off needle to block the inlet of the first liquid pipeline in the liquid cap; and the valve opening mechanism is used to drive the piston shut-off needle to overcome the elastic force of the elastic component to move so as to prompt the piston shut-off needle to open the inlet of the first liquid pipeline in the liquid cap.

[0011] Preferably, the piston shut-off needle comprises a pin and a tip portion and a piston portion arranged on the pin, wherein the outer diameter of the piston portion is larger than the outer diameter of the pin; an opening portion cooperating with the tip portion is arranged at the inlet of the first liquid pipeline in the liquid cap; a groove is arranged on the main body at a position corresponding to the piston portion; a second mounting groove is arranged on the piston portion, and the elastic component comprises a compression spring, one end of the compression spring acts on the upper cover, and the other end acts in the second mounting groove; the elastic force of the compression spring prompts the tip portion to cooperate with the opening portion to block the inlet of the first liquid pipeline in the liquid cap.

[0012] Preferably, the air inlet is in two groups, namely the first air inlet and the second air inlet, and correspondingly, the gas flow channels are also in two groups, namely the first gas flow channel and the second gas flow channel; the gas channels are also in two groups, namely the first gas channel and the second gas channel; wherein, the first air inlet, the first gas flow channel and the first gas channel are connected in sequence, and the outlet of the first gas channel is connected to the gas pipeline in the liquid inlay; the second air inlet, the second gas flow channel and the second gas channel are connected in sequence, and the outlet of the second gas channel is connected to the second mounting groove; wherein, the high-pressure gas in the second gas channel prompts the piston part of the piston shut-off needle to overcome the elastic force of the compression spring and move to open the inlet of the first liquid pipeline in the liquid cap.

[0013] Preferably, the liquid inlet mechanism also includes an opening adjustment mechanism for adjusting the distance between the tip of the piston shut-off needle and the opening of the liquid cap, the opening adjustment mechanism includes a stroke adjustment nut, the stroke adjustment nut is installed in the middle of the upper cover and is connected to the upper cover by a thread; one end of the compression spring is located in the second mounting groove of the piston part, and the other end is located in the limit groove of the stroke adjustment nut.

[0014] Preferably, the opening adjustment mechanism also includes an adjustment component for adjusting the tightness of the stroke adjustment nut, the adjustment component includes a steel ball, a tension spring and an adjustment screw, wherein a radially extending adjustment hole is provided on the upper cover, the steel ball is arranged in the adjustment hole; the adjustment screw is installed on the adjustment hole; the tension spring is located between the steel ball and the adjustment screw, and the elastic force of the tension spring causes the steel ball to press against the outer side of the stroke adjustment nut.

[0015] Compared with the prior art, the utility model has the following advantages and beneficial effects:

[0016] The spray mechanism in the air atomizing spray gun of the utility model adopts a coaxially arranged gas pipe and liquid pipe, and the extended sections of the gas pipe and the liquid pipe extending out of the main body are provided with bending sections. The spray angle of the air atomizing spray gun of the utility model is changed by selecting gas pipes and liquid pipes with different bending angles, so as to adapt to a specific spraying environment, thereby increasing the application range of the air atomizing spray gun of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 and Figure 2 The utility model is a schematic structural diagram of the air atomizing spray gun from two different perspectives.

[0018] Figure 3 It is a cross-sectional view of the air atomizing spray gun of the utility model.

[0019] Figure 4 and Figure 5 Schematic diagram of the structure from two different perspectives of the main body and the liquid cap.

[0020] Figure 6 Schematic diagram of the structure of the tracheal cap and liquid inlay.

[0021] Figure 7 It is a schematic diagram of the structure of the piston cut-off needle.

[0022] Figure 8 It is the movement route map of high-pressure gas, high-pressure liquid and atomized gas, among which V1 is the movement route map of high-pressure gas; V2 is the movement route map of atomized gas; V3 is the movement route map of high-pressure liquid. DETAILED DESCRIPTION

[0023] The present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0024] See also Figure 1-Figure 8 The air atomizing spray gun of the utility model comprises a main body 6, an air inlet mechanism, a liquid inlet mechanism and a spray mechanism arranged in the main body 6, wherein:

[0025] The air intake mechanism comprises an upper cover 1 and an air intake port arranged on the upper cover 1, wherein the upper cover 1 is mounted on the main body 6 by means of a hexagon socket head screw 18, and a gas flow channel is arranged on the upper cover 1, and the gas flow channel is communicated with a gas channel in the main body 6;

[0026] The liquid inlet mechanism comprises a liquid inlet 4c arranged on the main body 6, wherein the liquid inlet 4c is arranged on the side wall of the main body 6 and communicates with the liquid channel on the main body 6;

[0027] The spray mechanism comprises a gas pipe 12 and a liquid pipe 13 arranged on the main body 6, wherein the liquid pipe 13 is coaxially arranged with the gas pipe 12 and both extend to the outside of the main body 6; the liquid pipe 13 is located on the inner side of the gas pipe 12; the main body 6 is also provided with a liquid cap 8, an air pipe cap 9 and a nut 10 for mounting the liquid cap 8 and the air pipe cap 9 on the main body 6; wherein the main body 6 is provided with a first mounting groove for mounting the liquid cap 8, and the liquid cap 8 is mounted in the first mounting groove; a first liquid pipeline is arranged in the liquid cap 8; and a nut 10 is arranged in the air pipe cap 9. A liquid inlay 11 is provided, and the liquid inlay 11 is connected to the liquid cap 8. A gas pipeline 112 and a second liquid pipeline 111 are provided in the liquid inlay 11; wherein the second liquid pipeline 111 is provided in the middle of the liquid inlay 11; the gas pipelines 112 are multiple groups, and the multiple groups of gas pipelines 112 are evenly arranged along the circumferential direction of the liquid inlay 11; the inlet of the first liquid pipeline is connected to the outlet of the liquid channel, and the outlet of the first liquid pipeline is connected to the inlet of the second liquid pipeline 111; and the outlet of the second liquid pipeline 111 is connected to the liquid pipe 13.

[0028] See also Figure 1-Figure 8 The liquid inlet component also includes a piston shut-off needle 7 and a valve opening mechanism for driving the piston shut-off needle 7 to move to open the first liquid pipeline of the liquid cap 8, wherein the piston shut-off needle 7 is installed in the main body 6 through an elastic component; the elastic force of the elastic component prompts the piston shut-off needle 7 to block the inlet of the first liquid pipeline of the liquid cap 8; the valve opening mechanism is used to drive the piston shut-off needle 7 to overcome the elastic force of the elastic component to move so as to prompt the piston shut-off needle 7 to open the inlet of the first liquid pipeline of the liquid cap 8.

[0029] See also Figure 1-Figure 8 The piston shut-off needle 7 includes an ejector pin 701, a tip portion 702 and a piston portion 703 arranged on the ejector pin 701, wherein the outer diameter of the piston portion 703 is greater than the outer diameter of the ejector pin 701; an opening portion cooperating with the tip portion 702 is arranged at the inlet of the first liquid pipeline of the liquid cap 8; a groove is arranged on the main body 6 at a position corresponding to the piston portion 703; a second mounting groove is arranged on the piston portion 703, and the elastic component includes a compression spring 14, one end of the compression spring 14 acts on the upper cover 1, and the other end acts in the second mounting groove;

[0030] The elastic force of the compression spring 14 causes the tip portion 702 to cooperate with the opening portion to block the inlet of the first liquid conduit of the liquid cap 8;

[0031] In this embodiment, the air inlet is divided into two groups, namely, the first air inlet 4a (arranged on the front of the upper cover 1) and the second air inlet 4b (arranged on the side of the upper cover 1). Correspondingly, the gas flow passage is divided into two groups, namely, the first gas flow passage and the second gas flow passage; the gas channel is divided into two groups, namely, the first gas channel 4d and the second gas channel; wherein, the first air inlet 4a, the first gas flow passage and the first gas channel 4d are connected in sequence (see Figure 8 V2 in the figure), the outlet of the first gas channel 4d is connected to the gas pipeline 112 in the liquid inlay 11; the second gas inlet 4b, the second gas flow channel and the second gas channel are connected in sequence (see Figure 8 V1 in the figure), the outlet of the second gas channel is connected to the second mounting groove; the high-pressure gas in the second gas channel prompts the piston portion 703 of the piston shut-off needle 7 to overcome the elastic force of the compression spring 14 to move to open the inlet of the first liquid pipeline of the liquid cap 8.

[0032] See also Figure 1-Figure 8 The liquid inlet mechanism also includes an opening adjustment mechanism for adjusting the distance between the tip 702 of the piston shut-off needle 7 and the opening of the liquid cap 8, and the opening adjustment mechanism includes a stroke adjustment nut 3, which is installed in the middle of the upper cover 1 and is threadedly connected to the upper cover 1; one end of the compression spring 14 is located in the second installation groove of the piston part 703, and the other end is located in the limit groove of the stroke adjustment nut 3. By rotating the stroke adjustment nut 3, the stroke adjustment nut 3 can be driven to perform linear motion, thereby adjusting the compression amount of the compression spring 14. In this way, under the action of the same high-pressure gas in the second gas channel, the movement stroke of the piston shut-off needle 7 will also change, thereby changing the distance between the tip 702 of the ejector pin 701 and the opening of the liquid cap 8, thereby changing the opening of the opening of the liquid cap 8, thereby adjusting the liquid flow entering the liquid cap 8.

[0033] See also Figure 1-Figure 8The opening adjustment mechanism also includes an adjustment component for adjusting the tightness of the stroke adjustment nut 3, the adjustment component includes a steel ball 2, a tension spring 5 and an adjustment screw 20, wherein a radially extending adjustment hole is provided on the upper cover 1, the steel ball 2 is arranged in the adjustment hole, and the adjustment screw 20 is installed on the adjustment hole, the tension spring 5 is located between the steel ball 2 and the adjustment screw 20, and the elastic force of the tension spring 5 causes the steel ball 2 to press against the outer side of the stroke adjustment nut 3; by rotating the adjustment screw 20, the adjustment screw 20 is driven to make a linear motion in the adjustment hole, and then the compression amount of the tension spring 5 is adjusted, so as to change the contact force between the steel ball 2 and the stroke adjustment nut 3, and then change the tightness of the stroke adjustment nut 3.

[0034] See also Figure 1-Figure 8 A sealing ring 17 is provided at the connection portion between the liquid cap 8 and the liquid inlay 11; a sealing ring 15 is provided between the ejector pin 701 and the main body 6, and the sealing ring 15 is installed on the main body 6; a sealing ring 16 is also provided between the piston part 703 and the side wall of the second mounting groove, and the sealing ring 16 is installed on the piston part 703; by providing the above-mentioned sealing rings, a good sealing effect can be achieved, and in this embodiment, the sealing ring can be an O-ring.

[0035] Finally, the number 19 in the figure is a hexagon socket screw, which can be used to block the gas and liquid channels.

[0036] See also Figure 1-Figure 8 The working principle of the air atomizing spray gun of the utility model is:

[0037] First, the air inlet pipe is connected to the first air inlet 4a and the second air inlet 4b respectively, and the liquid inlet pipe is connected to the liquid inlet 4c, then the atomizing gas is introduced into the first air inlet 4a, the high-pressure gas is introduced into the second air inlet 4b, and the high-pressure liquid is introduced into the liquid inlet 4c, wherein the high-pressure gas passes through the second gas flow channel and the second gas channel in sequence and then enters the gap between the piston part 703 and the second mounting groove, so as to cause the piston part 703 to overcome the elastic force of the compression spring 14 and move in the reverse direction, thereby causing the ejector pin 703 to move in the opposite direction. The tip 702 of the piston 703 is separated from the opening of the liquid cap 8, so that the high-pressure liquid entering from the liquid channel will enter the first liquid pipeline of the liquid cap 8, then enter the second liquid pipeline 111 in the liquid inlay 11, and finally enter the liquid pipe 13; while the atomized gas entering from the first gas inlet 4a passes through the first gas flow channel, the first gas channel 4d and the second gas pipeline 112 in sequence, and enters the gas pipe 12; finally, the atomized gas and the high-pressure liquid are sprayed out from the gas pipe 12 and the liquid pipe 13 respectively. When the spraying is completed, the high-pressure gas between the piston part 703 and the second mounting groove can be depressurized by the pressure relief valve, so that the piston cut-off needle 7 is blocked at the inlet of the first liquid pipeline of the liquid cap 8 under the elastic force of the compression spring 14 (that is, the tip 702 cooperates with the opening).

[0038] During the spraying process, the stroke adjustment nut 3 can be rotated to drive the stroke adjustment nut 3 to make a linear motion, thereby adjusting the compression amount of the compression spring 14. In this way, under the action of the same high-pressure gas in the second gas channel, the movement stroke of the piston cut-off needle 7 will also change, thereby changing the distance between the tip 702 of the ejector pin 701 and the opening of the liquid cap 8, thereby changing the opening of the opening of the liquid cap 8, thereby adjusting the liquid flow entering the liquid cap 8. In this process, the adjusting screw 20 can be rotated to drive the adjusting screw 20 to make a linear motion in the adjusting hole, thereby adjusting the compression amount of the tension spring 5, thereby changing the contact force between the steel ball 2 and the stroke adjustment nut 3, thereby changing the tightness of the stroke adjustment nut 3.

[0039] The above is a preferred implementation mode of the present invention, but the implementation mode of the present invention is not limited by the above content. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. An air atomizing spray gun, comprising a main body, an air inlet mechanism, a liquid inlet mechanism and a spray mechanism arranged in the main body, characterized in that: The spray mechanism includes a gas pipe and a liquid pipe arranged on the main body, wherein the liquid pipe is coaxially arranged with the gas pipe, and the liquid pipe is located on the inner side of the gas pipe; the liquid pipe and the gas pipe both extend outside the main body, and a bending section is arranged on the extension section outside the main body; wherein the gas pipe is connected to the outlet of the gas channel in the main body; and the liquid pipe is connected to the liquid channel in the main body.

2. The air atomizing spray gun according to claim 1, characterized in that: The air intake mechanism comprises an upper cover and an air intake port arranged on the upper cover, wherein the upper cover is mounted on the main body, a gas flow channel is arranged on the upper cover, and the gas flow channel is communicated with a gas channel in the main body.

3. The air atomizing spray gun according to claim 2, characterized in that: The liquid inlet mechanism comprises a liquid inlet arranged on the main body, wherein the liquid inlet is arranged on the side wall of the main body and communicated with the liquid channel on the main body.

4. The air atomizing spray gun according to claim 3, characterized in that: The main body is also provided with a liquid cap, an air pipe cap and a nut for mounting the liquid cap and the air pipe cap on the main body; wherein, the main body is provided with a first mounting groove for mounting the liquid cap, and the liquid cap is mounted in the first mounting groove; a first liquid pipeline is arranged in the liquid cap, a liquid inlay is arranged in the air pipe cap, and a gas pipeline and a second liquid pipeline are arranged in the liquid inlay; wherein, the second liquid pipeline is arranged in the middle of the liquid inlay; the gas pipelines are divided into multiple groups, and the multiple groups of gas pipelines are evenly arranged along the circumferential direction of the liquid inlay; the inlet of the first liquid pipeline is connected with the outlet of the liquid channel, and the outlet of the first liquid pipeline is connected with the inlet of the second liquid pipeline; the outlet of the second liquid pipeline is connected with the liquid pipe.

5. The air atomizing spray gun according to claim 4, characterized in that: The liquid inlet mechanism also includes a piston shut-off needle and a valve opening mechanism for driving the piston shut-off needle to move to open the first liquid pipeline in the liquid cap, wherein the piston shut-off needle is installed in the main body through an elastic component; the elastic force of the elastic component prompts the piston shut-off needle to block the inlet of the first liquid pipeline in the liquid cap; and the valve opening mechanism is used to drive the piston shut-off needle to overcome the elastic force of the elastic component to move so as to prompt the piston shut-off needle to open the inlet of the first liquid pipeline in the liquid cap.

6. The air atomizing spray gun according to claim 5, characterized in that: The piston shut-off needle comprises an ejector pin and a tip portion and a piston portion arranged on the ejector pin, wherein the outer diameter of the piston portion is larger than the outer diameter of the ejector pin; an opening portion cooperating with the tip portion is arranged at the inlet of the first liquid pipeline in the liquid cap; a groove is arranged on the main body at a position corresponding to the piston portion; a second mounting groove is arranged on the piston portion, and the elastic component comprises a compression spring, one end of the compression spring acts on the upper cover, and the other end acts in the second mounting groove; the elastic force of the compression spring prompts the tip portion to cooperate with the opening portion to block the inlet of the first liquid pipeline in the liquid cap.

7. The air atomizing spray gun according to claim 6, characterized in that: The air inlet is divided into two groups, namely the first air inlet and the second air inlet, and correspondingly, the gas flow channels are also divided into two groups, namely the first gas flow channel and the second gas flow channel; the gas channels are also divided into two groups, namely the first gas channel and the second gas channel; wherein, the first air inlet, the first gas flow channel and the first gas channel are connected in sequence, and the outlet of the first gas channel is connected to the gas pipeline in the liquid inlay; the second air inlet, the second gas flow channel and the second gas channel are connected in sequence, and the outlet of the second gas channel is connected to the second mounting groove; wherein, the high-pressure gas in the second gas channel prompts the piston part of the piston shut-off needle to overcome the elastic force of the compression spring to move to open the inlet of the first liquid pipeline in the liquid cap.

8. The air atomizing spray gun according to claim 7, characterized in that: The liquid inlet mechanism also includes an opening adjustment mechanism for adjusting the distance between the tip of the piston shut-off needle and the opening of the liquid cap, the opening adjustment mechanism includes a stroke adjustment nut, the stroke adjustment nut is installed in the middle of the upper cover and is connected to the upper cover by a thread; one end of the compression spring is located in the second mounting groove of the piston part, and the other end is located in the limit groove of the stroke adjustment nut.

9. The air atomizing spray gun according to claim 8, characterized in that: The opening adjustment mechanism also includes an adjustment component for adjusting the tightness of the stroke adjustment nut, the adjustment component includes a steel ball, a tension spring and an adjustment screw, wherein a radially extending adjustment hole is provided on the upper cover, the steel ball is arranged in the adjustment hole; the adjustment screw is installed on the adjustment hole; the tension spring is located between the steel ball and the adjustment screw, and the elastic force of the tension spring causes the steel ball to press against the outer side of the stroke adjustment nut.

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